WO2007032093A1

WO2007032093A1 - Plastic fastener with unauthorized opening prevention function, and method and device for producing the same

Info

Publication number: WO2007032093A1
Application number: PCT/JP2005/017586
Authority: WO
Inventors: Juichi Kasai
Original assignee: Juichi Kasai
Priority date: 2005-09-13
Filing date: 2005-09-26
Publication date: 2007-03-22
Also published as: US20090129708A1; EP1941990A1; CN101263001B; CN101263001A; EP1941990A4

Abstract

A plastic fastener (1) with an unauthorized opening prevention function, in which a pair of engagement sections (1A, 1B) is formed on the surface of a plastic film (F). A tear tape (5) is separatably adhered, in the longitudinal direction of the plastic fastener, to the top surface on the opening side of the plastic fastener, and this enables unauthorized or erroneous opening to be recognized at a glance. The plastic fastener (1) is guided between two spaced apart and parallel guide rails (3A, 3B) and, simultaneously, between pairs of guide rollers (2A, 2B). The tear tape (5) having on one side an easily separatable plastic fastener layer is guided to between the guide rails (3A, 3B), and the plastic fastener (1) and the tear tape (5) are hot stamped for fusion bonding by a heating body.

Description

Specification

Plastic chuck with tamper-evident prevention function, manufacturing method thereof and manufacturing apparatus

Technical field

[0001] The present invention relates to a plastic chuck, a plastic chuck with a slider, and a bag with a chuck, which are used for packaging containers for foods, medicines, electronic parts, etc. Related to prevention of tampering.

Background art

[0002] Bags equipped with plastic chucks are often used as packaging materials for foods, medicines, electronic parts and other various items. Especially, plastic chucks with sliders are easy to open and can be resealed. It is used a lot.

[0003] Along with the variety of items to be packaged, a higher degree of airtightness is required, and

To provide functions that can be confirmed to be opened after hermetic packaging, because it can be opened after fraudulent packaging for illegal purposes or mistakes and foreign matter is mixed in or the quality of the contents is impaired. Is desired.

[0004] The inventor of the present application has shown an example of a plastic chuck with a slider having a function of preventing unauthorized opening in WO 2005/048763 A1 (Patent Document 1).

[0005] In the example shown in Fig. 14 (partial cross-sectional perspective view) and Fig. 15 which is a sectional view taken along the line AA 'of the above publication, in the bag body provided with the chuck with the slider, the slider at the top of the bag body And the chuck part is covered with a perforated cover film. In this example, when opening for the first time, the cover film is cut along the perforation, and then the chuck is opened and closed with a slider. However, this has the disadvantages of poor appearance and poor industrial productivity.

In the example shown in FIG. 16 (partial cross-sectional perspective view) and FIG. 17 which is a cross-sectional view taken along the line BB ′ of the publication, in the bag body provided with the slider-attached chuck, the sewing machine is provided inside the bag body. A partition film with eyes is provided. In this example, the first time you open the slider After opening the chuck, the perforation of the partition film is opened. The appearance and productivity are good. However, when the contents are fine particles such as powder, there is a problem that the fine particles are clogged in the partition film and smooth discharge cannot be performed.

[0007] In FIG. 18 of the above publication, in a bag body equipped with a chuck with a slider, the top of the chuck is spot welded with the slider 1 in the closed position, and the spot welded portion is cut with a slider at the first opening. An example of a scheme to take is shown. In this example, when the chuck is closed, the films on the top of the chuck are in close contact with each other, so it is difficult to determine from the appearance whether the spot weld is cut off or not.

In the example shown in FIG. 19 of the above publication, a perforation is provided in the upper part of the chuck (a part above the engaging part), and a part of the upper part of the chuck is cut out with the chuck closed. The slider is installed in When opening, the upper part of the chuck is cut from the perforation with a slider, but it may not be cut well. In addition, this method cannot be used unless the chuck's engagement force is the type with the flange (upper part) protruding upward.

[0009] Although the method shown in Figs. 14 and 16 of the above publication has an advantage that the sealing of the bag body can be secured even if the perforation is adopted, the sealing property of the bag body is not good for the chuck in the methods shown in Figs. Because it depends on airtightness, it cannot be used for long-term storage such as retort food.

[0010] In addition, the inventor of the present application disclosed in Japanese Patent Application Laid-Open No. 2004-26193 (Patent Document 3) that one claw in a plastic chuck having a pair of male and female claws in order to prevent unauthorized opening of the chuck. It was proposed that a cover piece covering the opening side end portion of the other claws is provided at the opening side end portion of the other claws, and this covering piece and the opening side end portions of the other claws are welded. However, Patent Document 3 does not specifically disclose an apparatus or method for industrially performing such welding.

[0011] Further, the inventor of the present application disclosed in WO 03/022697 A1 (Patent Document 2) a slider that can be applied to a highly airtight plastic chuck in which an engaging portion of a plastic chuck is welded via an easily peelable plastic layer. Disclosed. Although such a high airtight plastic chuck has a large opening strength, the slider disclosed in Patent Document 2 is a small and powerful slider that can open even a plastic chuck having a large opening strength. [0012] Then, in the Patent Document 1, the inventor of the present application uses an ultrasonic wave to weld the easily peelable plastic layer in the plastic chuck having the easily peelable plastic layer extending in the longitudinal direction of the plastic chuck, and the weld portion has a peel strength. A method for continuously producing a highly airtight plastic chuck with a certain range has been disclosed.

Patent Literature l: WO 2005/048763 A1

Patent Document 2: WO 03/022697 A1

Patent Document 3: Japanese Patent Laid-Open No. 2004-26193

Patent Document 4: Japanese Unexamined Patent Application Publication No. 2004-209841

Patent Document 5: Japanese Unexamined Patent Application Publication No. 2004-196321

Disclosure of the invention

Problems to be solved by the invention

[0013] The present invention solves the problems of the conventional plastic chuck as described above, and if the plastic chuck is opened improperly or mistakenly, it is recognized that the plastic chuck has been opened immediately from the outside. Therefore, it is an object of the present invention to provide a plastic chuck that prevents unauthorized opening and can be produced efficiently.

[0014] Another object of the present invention is to provide an apparatus and a manufacturing method for manufacturing such a plastic chuck with an unauthorized opening preventing function.

Means for solving the problem

[0015] In the present invention, a tear tape having an easily peelable plastic layer is detachably welded to the top surface on the opening side of the plastic chuck, or the top surface on the opening side of the plastic chuck is welded so as to be cut in the longitudinal direction. This is the main feature. In the present invention, the top surface on the opening side of the plastic chuck is a portion composed of two edges extending in the longitudinal direction of the chuck on the opening side of two plastic films on which a pair of engaging portions are formed. That is, it is not necessarily a flat surface.

[0016] According to the present invention, the two elongated guide rails for guiding the outer surface of the opening side end portion of the plastic chuck having a pair of engaging portions formed on the surface of the plastic film are parallel to each other. A set of two guide rollers arranged to hold the plastic film on the contents side in the vicinity of the engaging portion of the plastic chuck is the guide rail. A plurality of sets are installed opposite to each other, and the rotation axis of each guide roller is arranged in a direction orthogonal to the guide rail, and is heated on the opposite side of the guide rail from the guide roller. A body is disposed opposite the gap between the two guide rails, and the heating body is moved closer to and away from the guide rails in order to heat the opening side top surface of the plastic chuck sandwiched between the guide rails. The object is achieved by an apparatus for manufacturing a plastic chuck with an unauthorized opening preventing function, characterized in that a moving means for enabling movement is provided.

[0017] In addition, by installing a tear tape supply device that feeds the tear tape into the gap between the guide rails in the manufacturing apparatus, the tear tape can be welded to the top surface of the opening side of the plastic chuck so as to be peeled off. The object can be achieved.

[0018] In the manufacturing apparatus, the heating body may be a plate-like body having an edge parallel to the guide rail, and the edge of the edge may be linear or uneven. Alternatively, a rotatable disk having a rotation axis orthogonal to the longitudinal direction of the guide rail and the moving direction of the heating body may be used as the heating body.

[0019] In addition, the manufacturing apparatus may include at least one connection portion where the two guide rails are connected to each other on the heating body side. In this case, the calorie heating body shall have an edge part where the part facing the connection part is a concave part so that it does not collide with the connection part when it moves forward against the guide rail.

[0020] According to the present invention, a plurality of guide rollers composed of two elongated guide rails arranged in parallel with a gap between each other, and one set and two sets installed facing the guide rail. Further, a plastic chuck having a pair of engaging portions formed on the surface of the plastic film is supplied to guide the outer surface of the opening side end portion of the plastic chuck to the gap between the guide rails and the engaging portion of the plastic chuck. The plastic film on the contents side in the vicinity of is held between the guide rollers of each set, and the movement of the plastic chuck is stopped in the clamped state, and the opening side top surface of the stopped plastic chuck is parallel to the guide rail. A plastic with a tamper-evident-preventing function, characterized in that it is hot-stamped by a heated body having an edge and welded so that it can be cut. The above object is achieved by the manufacturing method of the kuchak. [0021] Further, according to the present invention, a plurality of guides composed of two elongated guide rails arranged in parallel with a gap between each other, and one set and two guides installed opposite to the guide rail. The roller is supplied with a plastic chuck having a pair of engaging portions formed on the surface of the plastic film and a tear tape provided with an easily peelable plastic layer on one side, and at the time of the supply, the easily peelable plastic layer of the tear tape is supplied. The outer surface of the opening side end of the plastic chuck is guided to the gap of the guide rail and the tear tape is guided to the gap, and at the same time, the plastic chuck is opened. The plastic film on the contents side in the vicinity of the engaging part is clamped between the guide rollers of each set, and the plastic is held in the clamped state. The movement of the chuck and the tear tape is stopped, a heating element having an edge parallel to the guide rail is inserted into the gap of the guide rail, and the opening side top surface of the stopped plastic chuck and the tear tape are heated. The above-mentioned object is achieved by a method of manufacturing a plastic chuck with an anti-tampering function, characterized in that the top surface of the opening side of the plastic chuck and the easily peelable plastic layer of the tear tape are welded so that they can be peeled off. To do.

[0022] In the manufacturing method, the plastic chuck or the plastic chuck and the tear tape are stopped and the welding is performed using a heating body having an edge parallel to the guide rail. Welding may be performed. In this case, in the manufacturing apparatus, using a rotatable heating disk having a rotation axis orthogonal to the longitudinal direction of the guide rail and the moving direction of the heating body, the hot stamping is performed continuously for welding. You may go.

[0023] According to the present invention, the plastic chuck having a pair of engaging portions formed on the surface of the plastic film, and on the opening side top surface of the plastic chuck along the longitudinal direction of the plastic chuck. The object is achieved by a plastic chuck with a tamper-evident prevention function characterized in that a tear tape is peelably bonded.

In this case, it is preferable that the peelable tear tape has a width of 0.5 mm or more and a range equal to or less than a value obtained by adding 4 mm to the thickness of the chuck. The peelable tear tape may be continuously bonded in the longitudinal direction of the plastic chuck, or may be attached in a broken line shape. [0025] The plastic chuck of the present invention includes a slider! /, Prefer to be.

[0026] Further, according to the present invention, a plastic chuck having a tear tape bonded to the opening-side top surface or a plastic chuck having the opening-side top surface continuously welded in the longitudinal direction is provided in the opening of the bag body. The above object is achieved by a bag body equipped with a plastic chuck with an unauthorized opening preventing function, which is characterized by being mounted.

The invention's effect

According to the manufacturing apparatus and the manufacturing method of the present invention, the top surface on the opening side of the plastic chuck is welded so as to be cut in the longitudinal direction, or the easily peelable plastic layer is provided on the top surface on the opening side of the plastic chuck. It is possible to industrially efficiently produce a plastic chuck in which the tear tape is peelably welded.

[0028] In the plastic chuck of the present invention, the tear tape having the easily peelable plastic layer is welded to the top surface on the opening side so as to be peelable, so that if the plastic chuck is opened improperly or mistakenly, the tear tape It will come off. Such a state cannot be restored to the original state even if a person who has committed fraud attempts to restore it. And it can be seen from the fact that it has been opened. In particular, when tear tape is used, even if a part of the tape is peeled off, the peeled-off portion of the tear tape will open, so it is obvious that you tried to open it. Also, if you make a lot of slits by cutting into the tear tape from the side edge, the tear tape will break if you try to peel the tear tape from the side edge, so you know that you tried to open it illegally . In the case of a plastic chuck with a slider, if this slit is formed by cutting it diagonally against the closed end of the chuck, the tear tape will break or tear if the slider is moved with the tear tape still attached. So you know that you tried to open it illegally or accidentally.

[0029] In the case of a plastic chuck in which the top surface on the opening side is welded so as to be cut in the longitudinal direction, if the plastic chuck is opened improperly or mistakenly, the welded portion on the top surface on the opening side is cut. It is clear that it was opened and tried to open.

[0030] In this way, since everyone shares the fact that opening is immediately seen through the appearance, there is no feeling of unauthorized opening. In other words, tampering can be prevented. [0031] Since the plastic chuck of the present invention can be industrially produced using a machine, it can be produced efficiently.

[0032] Further, as disclosed in Patent Document 1 or 2 described above, the engaging portion of the plastic chuck also has a pair of male and female claws, and a continuous clamping wall is provided inside one claws and the other claws. Provided is a bag with a slider that can be re-sealed after being opened on the premise of long-term storage by adding the function of preventing unauthorized opening of the present invention to a highly airtight plastic chuck having a continuous pressing rib inside the nail. be able to.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings.

[0034] The plastic chuck that is the subject of the present invention has any shape of the engaging portion as long as the pair of engaging portions 1A and IB are formed on the surfaces of the two plastic films F and F. In addition, the engagement portion force may be provided with a flange portion extending outward, or may be provided!

[0035] Further, in the present invention, the opening side top surface of the plastic chuck is a position at the end on the opening side, and the engaging portion may be the end or the flange portion may be the end. The end can be flat or curved, and the shape is not particularly limited.

[0036] The engaging portion of the plastic chuck 1 in the embodiment shown in FIGS. 1 and 2 is composed of a pair of male and female claws 1A and IB, and does not have a flange portion. The side surfaces TA and TB (see Fig. 2) are the opening side top surfaces of the plastic chuck.

In FIG. 1 and FIG. 2, a pair of elongated rectangular parallelepiped guide rails 3A and 3B are arranged in parallel with each other with a gap therebetween. These guide rails 3A and 3B are used to guide the two outer surfaces 1C and 1C at the opening end of the plastic chuck 1. The opening end of the plastic chuck 1 is inserted into the gap between the guide rails 3A and 3B. Is inserted. In this embodiment, the tear tape 5 is inserted into the gap between the guide rails 3A and 3B. The tear tape 5 has an easily peelable plastic layer 5E on one side, and the easily peelable plastic layer 5E is inserted so as to come into contact with the opening side top surfaces TA and TB of the plastic chuck 1.

[0038] As shown in FIG. 1 and FIG. 2, a pair of guide rollers 2A and 2B are opposed to the guide rails 3A and 3B, and a plurality of sets of guide rollers 2A and 2B are spaced apart in the longitudinal direction of the guide rails 3A and 3B. Installed ing. The guide rollers 2A and 2B are for holding the plastic films F and F on the contents side near the engaging portion of the plastic chuck 1. The rotation shafts 8A and 8B of the guide rollers 2A and 2B are arranged in a direction orthogonal to the guide rails 3A and 3B. Each guide roller 2A, 2B is preferably supported on the rotary shafts 8A, 8B via bearings.

[0039] On the side opposite to the guide rollers 2A and 2B with respect to the guide rails 3A and 3B, the heating element 4 is arranged to face the gap between the two guide rails 3A and 3B. The heating element 4 is connected to a moving means 6, such as an actuator, for moving the guide rails 3A and 3B so as to approach and separate. The heating element 4 is for heating the opening side top surfaces TA and TB of the plastic chuck 1 sandwiched between the guide rails 3A and 3B. The heating means 4 is directed to the gap between the guide rails 3A and 3B by the moving means 6. 1 and 2 advance to the position indicated by the two-dot chain line, and in the embodiment shown in FIGS. 1 and 2, the tear tape 5 and the top surfaces TA and TB of the plastic chuck 1 are heated.

In the embodiment shown in FIGS. 1 and 2, the heating element 4 is a plate-like body having an edge 4A parallel to the guide rails 3A and 3B, and the edge 4B of the edge 4A is linear. If the edge 4B of the heating element 4 is linear, a continuous weld can be formed. Although not shown, the edge 4B of the edge 4A of the heating element 4 may be uneven. In this case, a dotted-line weld can be formed.

In the embodiment shown in FIGS. 1 and 2, the tear tape 5 is welded to the opening side top surface of the plastic chuck 1 as follows.

[0042] Not shown, plastic chuck feeder and tear tape feeder force Plastic chuck 1 and tear tape 5 are fed between guide rails 3A and 3B and between guide rollers 2A and 2B. In this case, the easily peelable plastic layer 5E of the tear tape 5 is fed in contact with the opening side top surfaces TA and TB of the plastic chuck 1, and is inserted into the gap between the guide rails 3A and 3B outside the opening side end of the plastic chuck 1. Guides the surface 1C and 1C and guides the tape 5 to the gap. At the same time, the plastic films F and F on the contents side near the engaging portion 1A and IB of the plastic chuck 1 are clamped between the guide rollers 2A and 2B of each set. In this state, the movement of the plastic chuck 1 and the tear tape 5 is stopped. In this stopped state, the plastic chuck sandwiched between the guide rails 3 A and 3B 1 The opening side top surfaces TA and TB of the tape and the easily peelable plastic layer 5E of the tear tape 5 are in contact with each other. In the present invention, “the state of maintaining contact” means that the tear tape 5 and the top surface TA, TB of the plastic chuck 1 are close to each other in parallel, and the two come into contact with each other and are slightly adhered to each other. The state of being away from.

[0043] Next, the actuator 6 is actuated to be positioned at the standby position, and the plate-like heating element 4 is advanced to the position indicated by the two-dot chain line and inserted into the gap between the guide rails 3A and 3B. . Open plate top surface TA, TB and tear tape 5 of plastic chuck 1 that is stopped. The easy peeling plastic layer 5E of the tear tape 5 is melted by hot stamping, and the tear tape 5 is welded to the opening side top surfaces TA and TB of the plastic chuck 1 so as to be peelable. At this time, the form to be welded is determined by the shape of the edge 4B of the edge 4A of the plate-like heating element 4, and when the edge 4B is straight, it is welded linearly, or when the edge 4B is uneven, it is welded in dotted lines. . Thereafter, the actuator 6 is actuated again, and the plate-like heating element 4 is moved back to the standby position.

[0044] When the welding is completed, the plastic chuck 1 and the tear tape 5 are moved in the direction of the arrow indicated by OU T in FIG. 1, and between the guide rails 3A and 3B and between the guide rollers 2A and 2B. Unwelded plastic chuck 1 and tear tape 5 are fed in the direction of the arrow force OUT indicated by IN.

[0045] By repeating the above welding operation, the plastic chuck 1 in which the tear tape 5 is welded to the opening-side top surfaces TA and TB can be continuously manufactured.

As described above, according to the embodiment shown in FIGS. 1 and 2, a pair of male and female claws 1A and tear tapes 5 are attached to the opening side top surfaces TA and TB of the plastic chuck 1 made of IB. The welded plastic chuck having the function of preventing unauthorized opening of the present invention is manufactured.

FIG. 3 shows another example of the plastic chuck that can be manufactured by the apparatus shown in FIGS. 1 and 2. In the embodiment shown in FIG. 3, the tear tape 5 is not used, and the opening side top surfaces TA and TB of the plastic chuck 1 are welded to form a weld TS that continuously extends in the longitudinal direction of the chuck. It is a thing.

[0048] Such a weld TS is formed as follows. In the apparatus shown in FIGS. 1 and 2, a pair of engaging portions 1A and IB are provided between the guide rails 3A and 3B and between the guide rollers 2A and 2B. Supply the long film with plastic chuck F. The outer surface 1C at the opening end of the plastic chuck is guided to the gap between the guide rails 3A and 3B, and the plastic chuck F on the contents side near the IB is connected to the engaging part 1A of the plastic chuck. Hold it in 2B, and stop the movement of the plastic film F in the holding state. Then, the heating element 4 with the edge 4B of the edge 4A being linear is inserted into the gap between the guide rails 3A and 3B, and the opening side top surfaces TA and TB of the plastic chuck that is stopped are connected to the linear shape of the heating element 4. Hot stamping is performed by the edge 4B to form a weld TS that continuously extends in the longitudinal direction of the chuck.

[0049] Thereafter, the plastic film F is transferred in the OUT direction, a slider is attached, heat sealing HS is performed in a direction perpendicular to the longitudinal direction of the plastic film F, and the filling opening is closed after filling the contents. And then cut at the heat seal portion HS. In this way, it is possible to manufacture a bag having a plastic chuck with an unauthorized opening prevention function filled with the contents.

[0050] As shown in Fig. 3, in order to manufacture a plastic chuck with the opening side top surfaces TA and TB welded, at least a part of the engagement side 1A and the opening side end surfaces TA and TB of the IB It is preferable that an easily peelable plastic layer is formed on the opening side end faces TA and TB of any one of the overlapping portions. If it does in this way, the welding part TS of the longitudinal direction of a chuck | zipper can be easily cut | disconnected by a slider.

[0051] FIG. 4 is another embodiment of the plastic chuck manufacturing apparatus with an unauthorized opening preventing function of the present invention, which is a perspective view similar to FIG. 1, and FIG. 5 is a cross-sectional view taken along line B- of FIG. . In the embodiment shown in FIG. 1 and FIG. 2 described above, the force applied when the plastic chuck 1 and the tear tape 5 were stopped when welding was performed. The embodiment shown in FIG. 4 and FIG. This is an apparatus for welding while moving the tear tape 5 to the chuck 1. The guide rollers 2A and 2B and the guide rails 3A and 3B are the same as those of the apparatus shown in FIGS. In the embodiment shown in FIGS. 4 and 5, the heating element 4 is a rotatable disk. The heating disk 4 is rotatably supported by a rotating shaft 7 and is connected to a moving means 6 such as an actuator for moving the guide rails 3A and 3B so as to be close to and away from the guide rails 3A and 3B. The rotating shaft 7 is relative to the longitudinal direction of the guide rail and the moving direction of the heating disk 4. So as to be orthogonal to each other. When the edge of the heating disk 4 is made into a smooth circle, a continuous weld can be formed, and when the edge of the heating disk 4 is made into a gear, a dotted weld can be formed.

In the embodiment shown in FIGS. 4 and 5, the tear tape 5 is welded to the opening side top surface of the plastic chuck 1 as follows.

[0053] From a plastic chuck supply device and a tear tape supply device (not shown), a plastic chuck 1 having a pair of engaging portions 1A and IB and a tear tape 5 having an easily peelable plastic layer 5E on one side are spaced from each other. Supply between two elongated, rectangular parallelepiped shaped guide rails 3A, 3B and between a set of two guide rollers 2A, 2B. In this supply, as described with reference to FIGS. 1 and 2, the easily peelable plastic layer 5E of the tear tape 5 is brought into contact with the top surfaces TA and TB of the plastic chuck opening side, and the opening side end of the plastic chuck is set. The outer surfaces 1C and 1C of the part are guided to the gap between the guide rails 3A and 3B, and the tear tape 5 is also guided to the gap. At the same time, the plastic films F and F on the contents side near the engaging portion 1A and IB of the plastic chuck 1 are sandwiched between the guide rollers 2A and 2B of each set. Then, without stopping the plastic chuck 1 and the tear tape 5, move the rotatable heating disk 4 to the position indicated by the two-dot chain line and insert it into the gap between the guide rails 3A and 3B. . The heated disk 4 at the advanced position presses the tear tape 5 against the opening-side top surfaces TA and TB of the plastic chuck 1 and performs hot stamping while rotating in the moving direction as the plastic chuck 1 and the tear tape 5 move. Then, the opening side top surfaces TA and TB of the plastic chuck 1 and the easily peelable plastic layer 5E of the tear tape 5 are welded so as to be peelable.

[0054] In this embodiment, since the heating disk 4 can move between the forward position indicated by the two-dot chain line and the standby position indicated by the solid line, the heating disk 4 is stopped at the forward position, and the plastic chuck 1 Further, the tear tape 5 can be continuously welded by moving it continuously. Further, while the plastic chuck 1 and the tear tape 5 are continuously moving, the heating disk 4 can be intermittently welded by reciprocating between the forward movement position and the standby position.

[0055] Also in the apparatus shown in FIGS. 4 and 5, hot stamping is performed without using the tier tape 5. By performing the steps, it is possible to manufacture a plastic chuck having the opening side top surfaces TA and TB of the plastic chuck 1 as shown in FIG.

[0056] It should be noted that the present inventor does not provide a plurality of pairs of guide rollers 2A, 2B in order to sandwich the plastic films F, F on the contents side in the vicinity of the engaging portion of the plastic chuck 1, instead of providing a plurality of pairs of guide rollers 2A, 2B. We considered using the same guide rail as 3B. However, when such a guide rail is used, when the heating element 4 is pressed against the top surface of the opening side of the plastic chuck, the base of the engaging portion of the chuck strongly bites into the guide rail. When moving in the longitudinal direction, a frictional resistance is generated in the moving direction, and the frictional resistance varies greatly with time (the friction increases or decreases with time). For this reason, the chuck tape may be stretched at a speed of about 30 mZ required by a normal bag making machine, and the chuck may be deformed by frictional heat or elongation. For this reason, it is not very practical to use a guide rail to hold the plastic film on the contents side.

On the other hand, when the guide roller is used as in the present invention, the friction in the moving direction is generated when the plastic chuck moves in the longitudinal direction even if the base portion of the engaging portion of the chuck bites into the guide rail. Resistance is extremely small. In particular, friction resistance hardly occurs with rollers with bearings.

[0058] In terms of friction resistance, the two outer surfaces 1C and 1C at the opening end of the plastic chuck 1 have two guide rails 3A and 3B for guiding the clearance between them. The frictional resistance can be lowered by considering the thickness of the end portion and setting the distance appropriately.

[0059] Further, the inventor of the present application does not provide guide rails 3A and 3B to guide the two outer surfaces 1C and 1C and the tear tape 5 at the opening side end of the plastic chuck 1, but guide rollers 2A and 2B. It was also considered to use the same guide roller. However, if such a guide roller is used, if the tear tape speed fluctuates suddenly when the supply of the tear tape 5 starts or stops and the tape undulates, the tear tape may be caught in the gap between the guide rollers. The problem of entanglement with the guide roller occurs. On the other hand, when the guide rails 3A and 3B are used as in the present invention, such a problem does not occur. FIG. 6 shows another embodiment of the guide rails 3A and 3B and the plastic chuck. FIGS. 6 (a) and 6 (b) are cross-sectional views corresponding to the AA ′ cross-sectional view of FIG. 1, but are different examples.

[0061] In the embodiment shown in Fig. 6 (a), the guide rails 3A, 3B are elongated and rectangular in shape as a whole, but grooves 3C, 3C extending in the longitudinal direction are formed on the mutually opposing surfaces of the guide rail. Is provided. The upper and lower edges of the tier tape 5 enter into the grooves 3C and 3C and are planned. Further, the plastic chuck 1 of this embodiment is a type in which the engaging portions 1A and the flange portions FLA and FLB protrude from the IB force. The thickness of both flange portions FLA and FLB is smaller than the thickness of the engaging portions 1A and IB. Therefore, the gap between the guide rails 3A and 3B at the locations for guiding the flange portions FLA and FLB is narrower than that of the embodiment shown in FIGS. 1 and 2, but the heating elements of the guide rails 3A and 3B The gap on the side where 4 is inserted is widened for easy insertion.

[0062] When the guide rails 3A and 3B as shown in Fig. 6 (a) are used, the tear tape 5 can be reliably guided, and the opening side top surface of the tear tape 5 and the plastic chuck (in this embodiment, Can be kept in contact with the flanges FLA and FLB. Also, if the speed of the tear tape 5 fluctuates rapidly, the tape will wave, but if you use the guide rails 3A and 3B in Fig. 6 (a), the edge of the tear tape 5 will guide to the grooves 3C and 3C. As such, such problems do not arise.

In the embodiment shown in FIG. 6 (b), the plastic chuck 1 has flange portions FLA and FLB, and protrusions FPA and FPB are provided at the end portions of the flange portion. Further, the engaging portions 1 A and IB of the chuck are different from those shown in FIGS. 1 to 6 (&), and the force that is a pair of male and female claws has a continuous pressing rib, The claw has a continuous clamping wall. In this embodiment, the guide rails 3A and 3B are thin and are guided with the flange portions FLA and FLB sandwiched between the protrusions FPA and FPB. Since the guide rails 3A and 3B in this embodiment do not have a portion for guiding the tear tape, the guide rails 3A and 3B cannot be used when the tear tape is used, but the opening side top surface TA, TB ( In this embodiment, an easily peelable plastic layer is provided on the projections FPA and FPB) and is suitable for welding.

[0064] In the embodiment shown in Figs. 6 (a) and (b), the guide rollers 2A and 2B, the heating element 4 and the like This is the same as that described in the examples of FIGS. 1 and 2 and the examples of FIGS. 4 and 5, and the welding method can be performed as described in the examples.

[0065] Figs. 7 (a) and (b) are perspective views showing another embodiment of the plastic chuck of the present invention, (a) shows a state in which a tear tape is welded, and (b) shows Indicates that a part of the tear tape has been peeled off. Similar to the plastic chuck shown in FIG. 6 (a), the plastic chuck 1 of this embodiment has an engaging portion 1A and flange portions FLA and FLB that extend outwardly, and the opening side top surfaces TA and TB. The tear tape 5 is welded in a broken line TS. Thus, when the welding is in a broken line shape, concentrated stress acts on the peeling portion TS when the tear tape 5 is peeled off, so that there is an advantage that the tear tape 5 can be easily peeled even if the peel strength is strong.

[0066] In the present invention, the welding in the form of a broken line means that the shape of the welded portion TS is a short straight line, a dotted line consisting of points such as a circle, a square, a pattern, or a short straight line. This includes not only the use of the tear tape 5, but also the case where the top surface of the chuck is welded directly.

As shown in FIGS. 7 (a) and 7 (b), it is preferable that slits 5A cut from the side edges of the tear tape 5 are provided in the tear tape 5 with an interval in the longitudinal direction. When the slit 5A is provided in this way, if the tear tape 5 is peeled from the side, that is, from the side edge, a part of the tear tape 5 is peeled off, the tear tape 5 is cut in the middle because of the slit 5A. Therefore, it is clear that they have been removed illegally.

[0068] Further, it is preferable that the slit 5A of the tear tape 5 is cut obliquely from the side edge toward the closed end of the plastic chuck, that is, less than the angle Θ force. In this way, when the tear tape 5 is peeled off by force from the open end of the chuck to the closed end, the tear tape 5 can be continuously peeled off without being interrupted.

[0069] In addition, in the case of a plastic chuck with a slider, if the slider is forcibly driven with the tear tape attached to the chuck from the closed end to the open end, the tear tape 5 is cut by the movement of the slider. It can be seen at a glance that it has been removed illegally. In this case, the slit angle 0 is preferably in the range of 20 ° to 60 °. If it is less than the angle Θ force, the slit 5A becomes longer, so that the slit portion may hang down and the appearance may be deteriorated. When the angle Θ force exceeds 0 °, the slider Easy peeling part of tear tape 5 The peeling force of TS becomes weaker than the cutting force of tear tape 5, and the easy peeling part TS peels off without tearing the tear tape 5, and it is unclear that it has been illegally peeled off. There is a risk of becoming.

[0070] It should be noted that the position of slit 5A (interval between slits) and the number of slits 5A in tier tape 5 are not particularly limited as long as it is found that they have been illegally peeled off. It may be provided in such a way that it may be provided in a part of the length direction. Preferably, it is provided on both side edges of the tear tape as shown.

[0071] As shown in FIG. 7 (b), the width n (unit: millimeter) of the tier tape 5 is in the range of the following inequality when the thickness of the opening side top surface is m (unit: millimeter). It is preferable. 0. 5≤n≤m + 4 (Unit: mm)

In other words, if the width n (millimeter) of the tear tape 5 is less than 0.5 mm, the tear tape 5 may break when the tear tape is peeled off, and if it exceeds (m + 4) mm, the slider mounting portion However, the tear tape may protrude from the slider, which may deteriorate the appearance. When the slit 5A is provided in the tear tape 5, it is preferable that the width of the remaining portion (the portion that should be cut) is 0.5 mm or more at a position where the slit 5A exists.

FIG. 8 is a perspective view showing another embodiment of the guide rail of the present invention, in which the guide roller and the heating body are not shown. The guide rails 3A, 3 in this embodiment have the same cross-sectional shape as that shown in FIG. The two guide rails 3A and 3B are provided with at least one connection portion 3D, preferably two or more, connected to each other on the heating body (not shown) side. If the connecting portion 3D is provided in this way, even if the speed of the tear tape 5 fluctuates rapidly and the tape undulates and the groove 3C force of the guide rails 3A and 3B is likely to come off, such a tear tape 5 The connection part 3D restricts the movement of the groove to prevent the groove 3C from falling off. Therefore, the manufacturing speed (that is, the moving speed of the plastic chuck 1 and the tear tape 5) can be increased.

[0073] When manufacturing a bag body that includes the plastic chuck of the present invention and is filled with the contents, any of the following methods may be used.

[0074] After filling a normal bag with a chuck, the chuck is closed, and the present invention Using the above method, the top surface TA, TB of the opening side of the plastic chuck is welded directly or with tear tape to form a bag with an unauthorized opening prevention function.

[0075] Alternatively, before filling the contents, the opening side top surfaces TA, TB of the plastic chuck are welded directly or using a tear tape to form a bag body having an unauthorized opening prevention function, and the bag. Open part force on the lower and side surfaces of the body Fill the contents by a known method, and heat-seal and close the filling hole to make a bag with an unauthorized opening prevention function.

[0076] When the former and the latter production methods are compared, the latter is preferable because of higher production efficiency.

[0077] Further, a bag body containing contents automatically filled with contents can be manufactured by carrying out the method of the present invention during the bag making process.

Hereinafter, as an embodiment of the method of the present invention, a process for producing a bag body containing contents automatically filled with contents in the bag making process will be described with reference to FIG.

[0079] The two films constituting the bag fed from the film roll Yl, Υ2 are supplied to the bag making machine via the dancer roll Υ4. On the other hand, a high-sealing chuck in which the male and female claws are welded in advance through the easily peelable plastic layer at the chuck engaging portion is set at a predetermined position on the film by extending the chuck roll. A film with a highly sealed chuck is formed by intermittently welding the chuck to the film in steps 5 and 6.

[0080] This highly sealed film with a chuck is point-sealed at the end portion of the chuck bag with an ultrasonic heat sealer Υ9, and then two parallel films in the apparatus of the present invention shown in Figs. Guide rails 3 mm and 3 mm and multiple sets of guide rollers 2 mm and 2 mm are guided to a chuck guide Ύ10. On the other hand, a tier tape having an easily peelable plastic layer is fed from the tier tape roll 、 7 and guided to the chuck guide Ύ10 via the dancer roll Υ8 while maintaining a constant tension. In the chuck guide Ύ10, the welding device Yl composed of the heating element 4 and the moving means 6 in the apparatus of the present invention shown in FIGS. 1 is hot stamped intermittently. As a result, a tamper-proof portion with a tear tape welded to the top surface of the opening side of the chuck is formed.

[0081] The depth of the hot stamp is a force S that can be adjusted to any depth by adjusting the stroke of the moving means (actuator) 6 in the welding apparatus Y11. The range is 0.1 mm or more and 0.5 mm or less. Is preferred. If the force varies depending on the dimensional accuracy of the chuck, if less than 0.1 mm, the tear strength of the tear tape may become uneven or a part with insufficient welding may occur. If the thickness exceeds 0.5 mm, the peel strength may be too strong. If the tape width is narrow, the tear tape may break during peeling or the chuck may be deformed.

[0082] Film with a plastic chuck to which an unauthorized opening prevention part has been added is subjected to an opening prevention process such as a notch at a predetermined position of the closed end of the chuck with the closed end processing device Y12, and the slider is automatically opened with the automatic mounting device Y13. Attach the slider to the processed position. At this time, the slider is supplied from the slider automatic supply device Y14.

[0083] Subsequently, the longitudinal heat sealer Y15 heat-seal the chuck and the film part of the bag in a direction perpendicular to the chuck at a position to be the end of the bag, and then the filling machine Y16 from the bottom of the bag. Fill the contents. Then, after closing the bottom portion with the heat sealing machine Y17, the heat seal portion between the chuck and the film of the bag body is cut at the position to be the end portion of the bag body with the guillotine cutter Y18. As a result, it is possible to produce a high-tightness zippered bag body Y19 with a slider to which a tamper-evident prevention section filled with contents as a product is added.

[0084] When the heat seal part of the film of the chuck and the bag body is cut at the position to be the end of the bag body with the guillotine cutter Y18 without using the heat sealing machine Y17 and the filling machine Y16, the bag A highly airtight zippered bag with a slider to which a tamper-evident part with an open bottom is added is obtained.

[0085] With regard to the slider automatic mounting method, the inventor of the present application may use the method described in detail in Patent Document 4 (Japanese Patent Laid-Open No. 2004-209841), and the processing method for the closed end of the chuck. In this case, the inventor should use the method described in detail in Patent Document 5 (Japanese Laid-Open Patent Publication No. 2004-196321)!

Another embodiment of the process for manufacturing the plastic chuck having the unauthorized opening preventing function of the present invention will be described with reference to the process chart shown in FIG.

[0087] The claw of the engaging portion is welded from the chuck roll Y30 !,! /, The tape-shaped plastic chuck is fed, and the ultrasonic horn H-1 and the anvil A-1 are spaced apart from each other. Insert the easy-to-peel plastic layer part of the claw of the plastic chuck between them, and pass the plastic chuck between the ultrasonic horn H-1 and anvil A-1 at a constant speed to easily The release plastic layer is continuously melt bonded by ultrasonic waves. Subsequently, while feeding the plastic chuck with the claws welded to the chuck guide Ύ10 of the present invention and supplying the tier tape from the tier tape roll Y7, the rotating hot plate 4 as shown in FIG. 4 and FIG. Continuously hot stamping is performed by the welding device Y11 including the moving means 6. As a result, a highly airtight plastic chuck with a tamper-evident prevention part can be continuously manufactured. And this is wound up to make a chuck roll Y33.

[0088] When supplying the chuck roll Y33 with such a tamper-evident prevention part to the bag making machine process shown in FIG. 9, in the process of FIG. 9, the tear tape roll Y7, the chuck guide ΎΙΟ and the welding apparatus Y11 Is not used.

Note that the inventor of the present application previously described in detail in Patent Document l (WO 2005/048763 A1) regarding the process of making a highly sealed chuck in which the claws of the engaging portion are welded via an easily peelable plastic layer. Explained.

Example

A specific embodiment of the present invention will be described with reference to FIG. Film rolls Yl and Υ2 are each wrapped with a dry laminated film so that the inside is a linear low-density polyethylene resin (L LDPE) with a thickness of 40 and PET with a thickness of 20μ on the outside. Yes. This film is used to form a bag body, and is fed from the film roll Yl, Υ2 and supplied to the bag making machine via the dancer roll Υ4.

On the other hand, the high airtight chuck is wound on the chuck roll 3. In this high airtight chuck, a pair of engaging portions are formed on the surface of a tape-shaped plastic film F made of linear low density polyethylene (L LDPE), and at the end of the engaging portion on the opening side. This is a plastic chuck as shown in FIG. 6 (b) provided with a flange portion having a protrusion, and the claw portion of the engaging portion is bonded through an easily peelable plastic layer. The protrusion of the flange is necessary when opening with the slider, and the thickness of the protrusion on the opening side is 1.5 mm.

[0092] This high airtight chuck is fed out from the chuck roll Y3 and set at a predetermined position of the film for the bag body fed from the film roll Yl, Υ2, and then the chuck is inserted into the film with the heat sealing machines Υ5, Υ6. Welds. In this way, a film with a highly sealed chuck Formed.

[0093] The film with a high-sealing chuck was point-sealed at the chuck portion to be the end portion of the chuck bag with an ultrasonic heat sealing machine Y9, and then guided to a chuck guide rod 10 provided with a guide rail as shown in FIG. The guide rail is 400mm long and has two elongated rectangular parallelepiped shapes arranged parallel to each other at an interval. As shown in Fig. 8, the groove has a groove depth q force Slmm and groove width p is lmm. The total thickness S of the part for sandwiching the flange part and the groove part is 2mm, and the thickness t from the groove part to the side on the heating element side is lmm. Is connected at nine places. In addition, the guide roller, which has one set and two forces in the chuck guide rod 10, has a diameter of 12 mm, and eight such guide rollers are provided. As shown in Fig. 6 (a), the outer surface of the end of the flange portion of the chuck is sandwiched between the guide rails, and the plastic film on the contents side near the engaging portion of the highly sealed chuck is interposed between the guide rollers. Was pinched.

[0094] On the other hand, a 15 mm thick polyethylene terephthalate resin (PET) and 30 easy-peelable resin laminated 3 mm wide tear tape is fed from the tear tape roll Y7, and tension of 60 gf is passed through the dancer roll Y8. In this state, it was introduced into the guide rail groove of the chuck guide Ύ10. And with the top surface of the opening side of the high-tightness chuck and the easy peeling layer of the tear tape kept in contact with each other, it was hot-stamped to a depth of 0.3 mm by a welding device Y11 kept at 190 ° C, and the plastic A tamper tape was formed on the top surface of the chuck on the opening side with a tear tape welded in a broken line shape. In addition, the shape of the hot stamping part (edge) of the heating element in the welding device Y11 is the one in which rectangular points with a side length of 0.8 mm X O. 3 mm are arranged at intervals of 5 mm in the long side direction. The stamped shape was a broken line.

[0095] The film with the plastic chuck to which such an unauthorized opening prevention portion is added is further moved, and the closing end processing device Y12 performs opening prevention processing such as a notch at a predetermined position of the closing end of the chuck, and an automatic slider mounting device A slider was installed at the position where Y13 was processed to prevent opening. At this time, the slider was supplied from an automatic slider supply device Y14.

[0096] Subsequently, the longitudinal heat sealer Y15 heat seals the chuck and the film portion of the bag body at a position to be the end of the bag body in a direction perpendicular to the chuck, and then the bag with the guillotine cutter Y18. The heat seal part of the chuck and the bag film was cut at a position to be the end part of the body. As a result, a bag body having a high-tightness chuck with a slider, to which a chuck portion is 180 mm in length and depth is 260 mm, and an unsealing prevention portion in which the bottom portion of the bag body is opened is added (this book) was obtained. In the examples, the heat sealing machine Y17 and the filling machine Y16 described in FIG. 9 were not used).

[0097] Such a bag could be manufactured at a rate of 50 sheets per minute. As for the bag strength produced, 20 sheets were sampled and the chuck closing end force tear tape was peeled off. The peel strength at 90 ° peel was an average of 224 gf and standard deviation 41.9 gf, respectively.

As a result, it was determined that anyone can easily peel off the tear tape. In addition, it was confirmed that the tear tape that had been peeled off could not be restored and that it was effective in preventing unauthorized opening.

[0099] After the tear tape was peeled off, when the slider was slid from the closed end of the chuck toward the open end, the plastic chuck welded via the easily peelable plastic layer was easily peeled off and opened. Furthermore, the plastic chuck could be resealed when the slider was slid toward the closed end as well as the open end force.

Brief Description of Drawings

[0100] [FIG. 1] An embodiment of a manufacturing apparatus of a plastic chuck with an unauthorized opening preventing function of the present invention and a perspective view of a long plastic chuck and a long tear tape processed by this apparatus. A cross section of a long plastic chuck and a long tear tape.

[Fig. 2] A—C cross-sectional view of FIG. 1 (some hatchings are omitted to show the cross section).

FIG. 3 is a perspective view showing an embodiment of a bag body provided with a plastic chuck with an unauthorized opening preventing function of the present invention, and a part thereof is shown in cross section.

FIG. 4 is another embodiment of the plastic chuck manufacturing apparatus with an unauthorized opening preventing function of the present invention, and is a perspective view similar to FIG.

[Fig. 5] is a cross-sectional view taken along the line B-B 'in Fig. 4 (the hatching for showing the cross section is partially omitted).

[Fig. 6] Figs. 6 (a) and (b) are cross-sectional views of A- Fig. 1 (hatching for showing the cross section is Is a cross-sectional view corresponding to each other, but shows different embodiments.

[Fig. 7] Figs. 7 (a) and 7 (b) are perspective views showing another embodiment of the plastic chuck of the present invention, (a) shows a state where a tear tape is welded, and (b) shows Shows a part of tear tape peeled off.

FIG. 8 is a perspective view showing another embodiment of the guide rail of the present invention.

FIG. 9 is a process diagram showing an embodiment of a process for producing a bag body having a plastic chuck with a slider having an unauthorized opening preventing function according to the present invention in an opening.

FIG. 10 is a process diagram showing another embodiment of a process for producing a plastic chuck having an unauthorized opening preventing function according to the present invention.

Explanation of symbols

1 Plastic chuck

1A, IB plastic chuck engagement

2A, 2B Guide roller

3A, 3B guide rail

4 Heating body

5 Tier tape

6 Means of transportation

F Finolem

Claims

The scope of the claims

[1] Two elongate guide rails for guiding the outer surface of the opening side end of the plastic chuck having a pair of engaging portions formed on the surface of the plastic film are arranged in parallel to each other, and the plastic A set of two guide rollers for sandwiching the plastic film on the contents side near the engaging portion of the chuck is installed facing the guide rail, and the rotation shaft of each guide roller is It is arranged in a direction orthogonal to the guide rail, and a heating element is arranged on the opposite side of the guide rail from the guide roller so as to face the gap between the two guide rails. In order to heat the opening-side top surface of the plastic chuck sandwiched between, there is provided moving means for moving the heating body so as to be able to approach and separate from the guide rail. And tamper-resistant plastic zipper of the manufacturing apparatus, characterized in that are.

[2] Two elongate guide rails for guiding the outer surface of the opening side end portion of the plastic chuck having a pair of engaging portions formed on the surface of the plastic film are arranged in parallel to each other, and the plastic A set of two guide rollers for sandwiching the plastic film on the contents side near the engaging portion of the chuck is installed facing the guide rail, and the rotation shaft of each guide roller is It is arranged in a direction orthogonal to the guide rail, and a heating element is arranged on the opposite side of the guide rail from the guide roller so as to face the gap between the two guide rails. In order to heat the opening-side top surface of the plastic chuck sandwiched between, there is provided moving means for moving the heating body so as to be able to approach and separate from the guide rail. Apparatus for manufacturing a tamper-resistant plastic zipper, wherein the tear tape feeder Komu send a tear tape to the gap between the gas Idoreru is installed.

[3] The unauthorized opening according to claim 1 or 2, wherein the heating body is a plate-like body having an edge parallel to the guide rail, and the edge of the edge is linear or uneven. Equipment for manufacturing plastic chucks with prevention functions.

[4] The heating element is a rotatable disk, and the disk has a rotation axis orthogonal to the longitudinal direction of the guide rail and the moving direction of the hot body. Equipment for manufacturing plastic chucks with the function of preventing unauthorized opening as described in 1 or 2.

[5] The unauthorized opening prevention machine according to claim 1 or 2, wherein the two guide rails are provided with at least one connection portion to be connected to each other on the heating body side. Production equipment for plastic chucks with performance.

[6] Two elongated guide rails arranged parallel to each other with a gap between each other, and one set of two guide rollers installed opposite to the guide rail, on the surface of the plastic film Supplying a plastic chuck having a pair of engaging portions to guide the outer surface of the opening side end portion of the plastic chuck to the gap between the guide rails, and contents in the vicinity of the engaging portion of the plastic chuck The plastic film on the side is sandwiched between the respective sets of guide rollers, and the movement of the plastic chuck is stopped in the sandwiched state, and the opening side top surface of the stopped plastic chuck has an edge parallel to the guide rail. Of manufacturing a plastic chuck with a function to prevent unsealing Law.

[7] Two elongated guide rails arranged parallel to each other with a gap between each other, and one set of two guide rollers installed opposite to the guide rail, on the surface of the plastic film A plastic chuck having a pair of engaging portions and a tear tape having an easy-release plastic layer provided on one side are supplied, and the easy-release plastic layer of the tear tape can contact the top surface of the plastic chuck opening side at the time of supply. The outer surface of the opening end portion of the plastic chuck is guided to the gap of the guide rail and the tear tape is guided to the gap, and at the same time, the content side near the engaging portion of the plastic chuck is A plastic film is sandwiched between the guide rollers of each group, and the plastic chuck and the tear tape are sandwiched. The heater is stopped, the heating element having an edge parallel to the guide rail is inserted into the gap between the guide rails, and the opening side top surface of the stopped plastic chuck and the tear tape are heated by the heating element. A method of manufacturing a plastic chuck with a tamper-evident-preventing function, comprising stamping and welding the opening side top surface of the plastic chuck and an easily peelable plastic layer of the tear tape in a peelable manner.

[8] Two elongated guide rails arranged in parallel with a gap between each other, and one set of two guide rollers installed opposite to the guide rail, and a plurality of guide rollers, plastic A plastic chuck having a pair of engaging portions formed on the surface of the film is supplied, and the outer surface of the opening side end portion of the plastic chuck is guided to the gap of the guide rail. The plastic film on the content side in the vicinity is sandwiched between the guide rollers of the respective sets, and the plastic chuck is formed by a rotatable heating disk having a rotation axis orthogonal to the longitudinal direction of the guide rail and the moving direction of the heating body. A method of manufacturing a plastic chuck with an unauthorized opening preventing function, wherein the top surface of the opening side of the plastic chuck is continuously hot-stamped during movement and welded so as to be cut.

[9] Two elongated guide rails arranged parallel to each other with a gap between each other, and one set of two guide rollers installed opposite the guide rail, on the surface of the plastic film A plastic chuck having a pair of engaging portions and a tear tape having an easy-release plastic layer provided on one side are supplied, and the easy-release plastic layer of the tear tape can contact the top surface of the plastic chuck opening side at the time of supply. The outer surface of the opening end portion of the plastic chuck is guided to the gap of the guide rail and the tear tape is guided to the gap, and at the same time, the content side near the engaging portion of the plastic chuck is A plastic film is sandwiched between the guide rollers of each of the groups, and the longitudinal direction of the guide rail and the moving direction of the heating body are A rotatable heating disk having an orthogonal rotation axis is inserted into the gap between the guide rails, and the top surface of the opening side of the plastic chuck and the tear tape are moved between the plastic chuck and the tear tape. A method for producing a plastic chuck with an anti-unsealing function, wherein hot-stamping is performed with a heating disk, and the top surface of the opening side of the plastic chuck and the easily peelable plastic layer of the tear tape are welded so as to be peelable.

[10] In a plastic chuck having a pair of engaging portions formed on the surface of the plastic film, a tear tape is detachably bonded to the opening side top surface of the plastic chuck along the longitudinal direction of the plastic chuck. This is a plastic chuck with a tamper-evident prevention function.

[11] The tamper-resistant function as set forth in claim 10, wherein the peelable tear tape has a width of 0.5 mm or more and a range of not more than 4 mm plus the thickness of the chuck. Plastic chuck.

[12] The plastic with a tamper-evident-preventing function according to claim 10 or 11, wherein the peelable tear tape is formed with slits cut from the side edges at intervals in the longitudinal direction. Chuck.

13. The plastic chuck with an unauthorized opening preventing function according to claim 12, wherein the slit of the tear tape is in a state of being obliquely cut toward the closed end of the plastic chuck.

14. The plastic chuck with an unauthorized opening preventing function according to any one of claims 10 to 13, wherein the peelable tear tape is bonded in a broken line shape in the longitudinal direction of the plastic chuck.

[15] The plastic chuck has a slider, and is characterized in that it has a slider.

5. A plastic chuck with an unauthorized opening prevention function described in any one of 4 above.

[16] A bag comprising a plastic chuck with a tamper-evident prevention function, wherein the plastic chuck according to any one of claims 10 to 15 is attached to an opening of the bag.