CN102152164A - Isolator switching device - Google Patents
Isolator switching device Download PDFInfo
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- CN102152164A CN102152164A CN2010106162745A CN201010616274A CN102152164A CN 102152164 A CN102152164 A CN 102152164A CN 2010106162745 A CN2010106162745 A CN 2010106162745A CN 201010616274 A CN201010616274 A CN 201010616274A CN 102152164 A CN102152164 A CN 102152164A
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Abstract
The invention discloses an isolator switching device, which comprises an isolator (2), a cylinder executive component (31) moving the isolator (2) via fluid pressure, a supply loop (4) supplying work flow to the cylinder executive component (31), and control components (46, 5). When change of the work fluid pressure or fluid related parameters in the supply loop (4) is detected by a detecting component (45) during the isolator (2) controlled by an operating component (42) and moving between close and open states, the control components control the work fluid of the cylinder executive component (31) to ensure the stop or reverse movement of the isolator (2).
Description
Technical field
Technology disclosed herein relates to a kind of for example in various industrial equipments such as manufacturing installation, processing unit (plant) and working equipment, between the operate portions that is equivalent to this equipment grade by the operating personnel of isolated subject and this equipment between, be used for the switching device that comprises sliders such as covering, door that both are kept apart, particularly a kind of anti-interference mechanism (safety device) of this slider.
Background technology
For example, in various industrial equipments such as manufacturing installation, processing unit (plant) and working equipment for example, for guaranteeing safety near the operating personnel that operate this equipment etc., sometimes can be provided with between the operate portions of described equipment grade and operating personnel between with the two covering of keeping apart (lid), door leaf sliders such as (doors).Such slider generally can move between following two states.First kind of state in this two states is, as mentioned above, in the course of work of device, such slider between described operate portions grade and operating personnel between with the two state of keeping apart (this state, according to shape of slider etc. is not necessarily to be in closed condition, but for ease of explanation, be called closed condition below); Second kind of state is, when device stops, for example they can touch operate portions and grade when guaranteeing that operating personnel maintain etc., allow such slider from described operate portions grade and operating personnel between leave, not to the two state of being isolated (with above-mentioned the same, might not become the state of opening down in the shape of some slider etc., but, be called open mode) for ease of explanation.
We are known: in order to carry out the Push And Release of such slider automatically, and the useful cylinder source that is used as power in each communique below for example, putting down in writing.What urgently wish is, under the structure of opening, closing slider automatically, be provided with one when this slider moves particularly slider from open mode when closed condition moves, operating personnel, other barrier can not interfere with slider, prevent the safety device that operating personnel, other barrier are clamped by slider.
It is as follows that for example Japanese publication communique spy opens the invention of being put down in writing in the flat 5-16053 communique: such safety device constitutes: the end edge portion that the hollow projectile cartridge gonosome has been located at the switch door of along continuous straight runs slippage, when having barrier to interfere described hollow projectile cartridge gonosome to be crushed in the process of carrying out slippage at this switch door, variation by internal pressure detects it, and allows this door stop.
For example day disclosure utility model communique is real drives the safety device of being put down in writing in the flat 6-42044 communique and constitutes: install a small-sized secondary door that can relatively move on the automatic opening and closing door of along continuous straight runs slippage more in addition, utilize limit switch will in the process of this automatic opening and closing door slippage, have barrier to interfere and make described secondary door move this situation to detect, and allow this automatic opening and closing door stop or reverse moving.
It is as follows that for example Japanese publication communique spy drives the safety device of putting down in writing in the 2000-354936 communique: except the switch door leaf of the peristome of opening, closing slippage along the vertical direction, also this peristome is installed one and contain the closely detection bodies of switch, utilize described closely switch that barrier is sandwiched between the opening edge portion of peristome and the switch door leaf detection bodies and moved this situation and detect, and allow the switch door leaf stop or reverse moving.In " prior art " hurdle of this communique, also put down in writing following technology contents: area sensor is arranged in the moving range of described switch door leaf, when detecting barrier when crossing this situation by area sensor, allow the switch door leaf stop or reverse moving.
But, as disclosed safety device in described each communique, utilizing various sensors directly to detect under the situation of interference, on the one hand, sensor is more expensive, and on the other hand, can there be the dead angle in the detection of sensor, and this accuracy of detection is not necessarily very high.Increase sensor if eliminate such dead angle, the number of sensors that then for example is to be increased is many more, and cost will be high more.On the other hand, only depending on the increase number of sensors is that extremely difficulty is eliminated the dead angle fully, can't avoid detecting and omit.
Summary of the invention
Technology disclosed herein is finished in view of the premises.Its purpose is: in the switching device of the slider that possesses automatic open and close, be implemented at an easy rate in the switch motion of slider open and close that precision detects slider well and barrier is interfered this situation, can allow this slider stop reliably or reverse mobile safety device.
The present application people are not the interference situations that is conceived to directly detect slider and barrier, but the cylinder execution unit that utilizes fluid pressure to allow this slider move have been carried out various research and inquirement.Its result, the present application it is found that: with pressure or the relevant parameter of flow with the working fluid of the supply circuit of working fluid supply cylinder execution unit, in the process that described slider is moving, be certain under the normal condition, but when described slider and barrier interfere, described parameter can change, and the present invention finishes according to above discovery.
Particularly, technology disclosed herein relates to a kind of switching device of slider.This switching device comprises slider, cylinder execution unit, supply circuit, functional unit, detection part and control assembly.Wherein, described slider is used for being kept apart mutually by isolated subject and described operating personnel described between the regulation of industrial equipment is by isolated subject and operating personnel; Described cylinder execution unit is bound up on the described slider, and utilizes fluid pressure to allow described slider move with described closed condition of being kept apart by isolated subject and described operating personnel with between not with described open mode of being kept apart by isolated subject and described operating personnel; Described supply circuit is connected on the described cylinder execution unit, and working fluid is supplied with this cylinder execution unit; Described functional unit is located on the described supply circuit, and by control described working fluid is supplied with described cylinder execution unit and allow the work of described cylinder execution unit, moves between described closed condition and open mode to guarantee described slider; Pressure or the relevant parameter of flow with described working fluid detected at the assigned position place of described detection part on described supply circuit; Described control assembly, when had by the detected parameter of described detection part in the process that just between described closed condition and described open mode, is moving by the described functional unit of operation at described slider change in, control is to the supply of the described working fluid of described cylinder execution unit, to guarantee that described slider stops or reverse moving.
Here; " industrial equipment " is mainly to be included in places such as factory to make, process, be shaped and the equipment such as manufacturing installation, processing unit (plant) and working equipment of processing etc.; " industrial equipment by isolated subject " is; in the course of work of industrial equipment; contact, run into and be involved in this by the operating personnel that prevent to operate this industrial equipment etc. reliably, protect operating personnel and/or by the part that should protect of isolated subject by isolated subject.For example from protection operating personnel's viewpoint, the part of the cutter that the part that is included in the work of industrial equipment high speed by isolated subject is for example cut etc. etc." slider " can comprise will whole be covered the covering (lid) that gets up by isolated subject, be arranged on by the door leaf between isolated subject and the operating personnel (door) or shutter etc." (slider) in off position and between the open mode move " comprising: slider path in accordance with regulations from assigned position move to the situation of the another location different with it, for example as launching and roll shutter, utilize the variation of slider shape to switch the situation etc. of closed condition or open mode.
" having utilized the cylinder execution unit of fluid pressure " is to possess for example for the cylinder chamber that has come air pressure or oil pressure, and this fluid can be converted to the execution unit of mechanical energy, comprise by control and supply with fluid pressure, on the direction of regulation, do the reciprocating execution unit of linearity and be the center execution unit that carries out wobbling action etc. with the axle of regulation.
" functional unit " is that operating personnel etc. operate, and can control the parts of the working fluid of supply cylinder execution unit, can comprise for example supply of switch operating fluid and the transfer valve of non-supply.For example, functional unit can be made of the operation valve that directly manually carries out the change action of this transfer valve, also can be made of operated operated keys such as operating personnel by the electric magnetic valve that carries out described change action with for the change action that carries out this magnetic valve.
" detect the detection part of the parameter relevant " and be the pressure, flow, pressure-dependent special parameter of testing fluid or the parts of relevant special parameter with flow with the pressure of working fluid or flow, can contain output corresponding to the so-called sensor (pressure sensor, flow sensor etc.) of the signal of telecommunication of these parameter sizes, carry out and the corresponding mechanically operated parts of parameter size (for example, compression zone moves the parts with the big or small corresponding amount of pressure).
At described detection part is under the situation of electrical structure, and " control assembly " can comprise with the state of working fluid supply cylinder execution unit and the magnetic valve that state of working fluid supply cylinder execution unit is not switched and accept from the signal of telecommunication of described detection part to the circuit of the signal of telecommunication of described magnetic valve output regulation and constitute.Here said " circuit " can comprise: circuit that hardware ground constitutes and the software circuit that processor and combination of software are got up.At described detection part is under the situation of frame for movement, can mainly be converted to the formation control assemblies such as parts (for example attaching parts) of the change action of transfer valve by the mechanical action with described detection part.
Under this structure, according to the working fluid of the operation of functional unit being controlled the supply cylinder execution unit, slider just can move thus in off position or between the open mode.That is to say that slider is switched to closed condition or open mode according to operating personnel's operation.In the process that described slider is moving, under the normal condition, the parameter relevant with the pressure of the working fluid at regulation position on the supply circuit or flow is necessarily constant.
With respect to this, when this slider and for example operating personnel in the process that slider is moving interfered etc., this interference became the resistance that the obstruction slider moves, and can the working fluid that the drive source that allow this slider move is promptly supplied with execution unit be impacted.Therefore, certain constant described parameter can change when interfering under the normal condition.By the situation of change of detection part detected parameters, control assembly is according to the working fluid of the situation of change control supply cylinder execution unit of detected parameter, to guarantee that slider stops or reverse moving.When interference has taken place with barrier in this slider in the process that slider is moving like this, because slider stops or be reverse mobile and can the situation that operating personnel are clamped by slider be prevented trouble before it happens.
So,, be not to utilize sensor etc. directly to detect slider to interfere this situation, so can solve because of the caused expensiveization problem of use sensor with barrier because under described structure.Meanwhile, the dead angle problem of sensor is also solved.That is to say, because under described structure, utilize with supply circuit on the pressure of working fluid or the situation of change of the relevant parameter of flow detect, so no matter barrier partly interferes which of slider, this parameter can both be changed slider and barrier interfere this situation to detect.Therefore, the problem at dead angle can not occur, can precision detect the interference situation of slider and barrier well.Consequently, can realize the safety device of high measurement accuracy at an easy rate.
Described control assembly can constitute: when the value by the detected parameter of described detection part has surpassed the threshold value that configures in advance, its control is to the supply of the described working fluid of described cylinder execution unit, to guarantee that described slider stops or reverse moving.
According to this structure, be according to the interference situation that relatively detects slider of detected parameter value and threshold value, so promptly can realize high accuracy detection to the interference situation of slider with an easy structure.Here, " parameter value surpass configure in advance threshold value " comprises parameter value becomes greater than the value of threshold value and parameter value and becomes value both of these case less than threshold value.
Under this structure, the switching device of described slider can also comprise: detecting described slider is not the state-detection parts of described closed condition or described open mode; Described control assembly can also constitute: detected described slider by described state-detection parts is not closed condition or open mode and when by the detected parameter value of described detection part variation having been arranged, its control is to the supply of the described working fluid of described cylinder execution unit, to guarantee that described slider stops or reverse moving.
Being in closed condition or open mode at described slider is that slider is when remaining static, because neither the cylinder execution unit is supplied with working fluid, do not discharge working fluid from the cylinder execution unit yet, therefore with supply circuit on the pressure of working fluid or the relevant described parameter of flow be a definite value, but this value also can appear above being the situation of certain value under the state of described threshold value.In this case, might flase drop measure slider this situation has taken place to interfere.Therefore, by in conjunction with utilizing by the state of the detected slider of state-detection parts that is not being closed condition or not being this situation of open mode and comparison that detected parameter value and threshold value are carried out, just can precision detect the interference that slider is taken place when mobile well.
Described control assembly can constitute: when the rate of change by the detected parameter of described detection part has surpassed the threshold value that configures in advance, its control is to the supply of the described working fluid of described cylinder execution unit, to guarantee that described slider stops or reverse moving.
According to this structure, because be not, but detect the interference of slider according to the rate of change of parameter according to parameter value, survey the interference situation of slider so can prevent flase drop, accuracy of detection can further improve.
Described slider can constitute lifting on above-below direction, described cylinder execution unit has piston rod, this piston rod is accompanied by the supply of described working fluid and discharges on above-below direction elongation and shrink, and allows the lifting between open mode and closed condition of described slider.Described control assembly can constitute: when just towards the process that closed condition moves, having at described slider by the detected parameter value of described detection part from described open mode change in, the working fluid of described cylinder execution unit is supplied with in its control, to guarantee that described slider stops or reverse moving.
Description of drawings
Shown in Figure 1 is the approximate three-dimensional map that is provided with the cable processing apparatus of the related safety head of embodiment;
Fig. 2 is a vertical view of roughly representing the formation of cable processing apparatus;
Fig. 3 is the circuit diagram of formation in the air pressure loop of expression switching device, and shown is the state that lid is opened;
Fig. 4 is the circuit diagram of formation in the air pressure loop of expression switching device, and shown is the state of cover closing;
Fig. 5 is the circuit diagram of formation in the air pressure loop of expression switching device, and the abnormal condition of interference has taken place for shown is in the process that lid descends lid and barrier;
Fig. 6 is the circuit diagram of the formation of expression control circuit;
Fig. 7 (a) and Fig. 7 (b) are the figure of one of variation waveform example of the detected value of expression pressure sensor, Fig. 7 (a) expression be waveform when not interfering, shown in Fig. 7 (b) is waveform when having taken place to interfere.
Description of reference numerals
1 cable processing apparatus
2 safety heads (slider)
3 switching devices
31 cylinders (cylinder execution unit)
311 piston rods
32 automatic switches (state-detection parts)
4 supply circuits
42 operation valves (functional unit)
45 pressure sensors (detection part)
46 magnetic valves (control assembly)
5 control circuits (control assembly)
The specific embodiment
Below, the embodiment to safety device describes in conjunction with the accompanying drawings.In addition, following preferred implementation is only used for illustrating the example of the present invention's essence.Fig. 1 be shown schematically in comprise as the switching device of the safety head 2 of one of slider example, as the cable processing apparatus 1 of one of industrial equipment.Cable processing apparatus 1 is a kind of very long insulated wire to be cut into certain length, strips the insulating barrier at the both ends of this insulated wire that has scaled off, terminal is pressed solidly the device at the electric wire both ends of having been peelled off at this insulating barrier.
As shown in Figure 1 and Figure 2, various device is arranged on the upper surface of workbench 10, promptly constitutes cable processing apparatus 1.The left side of paper in Fig. 2 is provided with insulated wire W spool wound thereon, omits diagram, and this cable processing apparatus 1 (with reference to the hollow arrow direction among Fig. 2) is supplied with on the left side of insulated wire W paper from Fig. 2 of extracting out from this spool towards the right side.In addition, in the following description, for ease of explanation, the electric wire direction of the supply is decided to be fore-and-aft direction (paper left and right directions among Fig. 2), the supply side of electric wire is called the front side, a side opposite with the front side is called rear side, will be decided to be left and right directions (paper above-below direction among Fig. 2) with the direction of the direction of the supply quadrature of electric wire, claim that the paper upside is the left side among Fig. 2, the paper downside is the right side.
Particularly, cable processing apparatus 1 comprises: length measuring roller 11 and F type pincers 12 and R type pincers 13.Wherein, length measuring roller 11 is arranged in supply one side (front side) of electric wire on the upper surface of workbench and is positioned at the substantial middle position of left and right directions, and is that unit sends insulated wire W discontinuously towards the rear with the certain-length; These F type pincers 12 are supplied with downstream (rear side) with the electric wire that R type pincers 13 are arranged in this length measuring roller 11, will clamp from the insulated wire W that this length measuring roller 11 is sent.Between F type pincers 12 and R type pincers 13, be provided with the cutting insulated wire, peel off the cutter 14 of insulating barrier.Be provided with the front side in the left side of F type pincers 12 and press solidly machine 15; Be provided with rear side on the right side of R type pincers 13 and press solidly machine 16.Simultaneously, be provided with electric wire in the position that presses solidly machine 16 near described rear side and discharge machine 17.Here, the overview of in this cable processing apparatus 1 processing of insulated wire W being moved is described.Clamp the insulated wire W that 13 clampings are sent from length measuring roller 11 by F type pincers 12 with the R type, utilize cutter 14 to carry out the cutting work of insulated wire W in the centre position of F type pincers 12 and R type pincers 13.Afterwards, the F type clamps 12 clampings and insulated wire W and move towards the rear, and cutter 14 contact with the rearward end of this insulated wire W, and the F type clamps 12 and moves towards the direction of returning the home position from this state, so just has only the insulating barrier of the rearward end of insulated wire W to be peelled off.Equally, insulated wire W by clamping plate 13 clampings and move towards the place ahead, cutter 14 contact with the leading section of this insulated wire W afterwards, and R type pincers 13 move towards the direction of returning the home position from this state, so just have only the insulating barrier of the leading section of insulated wire W to be peelled off.After like this insulating barrier of wire end being peelled off, just clamp 12 clampings and the solid machine 15 of insulated wire W side pressure forward and move, meanwhile, clamp 13 clampings by the R type and the solid machine 16 of insulated wire W side pressure backwards and move (with reference to the chain-dotted line among Fig. 2) by the F type.Then, under this state, press solidly in the front side machine 15 and rear side press solidly machine 16 carry out respectively with terminal T press solidly electric wire W each end press solidly action, the F type clamps 12 clampings and insulated wire W and return the home position, on the other hand, R type pincers 13 just return the home position after insulated wire W is given electric wire and discharges machine 17 not clamping insulated wire W, and that obtain from electric wire discharge machine 17 is the insulated wire W that disposes that terminal T has pressed solidly at two ends.Such action is carried out continuously.In addition, cut here insulated wire W, peel off insulating barrier and all carry out with cutter 14.But in addition, can also possess three cutter, for example be respectively cutting insulated wire W cutter, peel off electric wire W leading section insulating barrier cutter and peel off the cutter of insulating barrier of the rearward end of electric wire W.
Like this, in this cable processing apparatus 1, be provided with aforesaid, safety head 2 that various machines 11～17 on day plate are kept apart with operating personnel and the switching device thereof of in this carries out the course of work that electric wire handles, being used for being arranged in.As shown in Figure 1, safety head 2 mainly is made of above one and four sides, is the rectangle covering of an open lower side, is arranged to all cover the state that gets up (with reference to the chain-dotted line among Fig. 1 with being arranged in each machine 11～17 on the upper surface of workbench 10.Claim that below this state is the closed condition of lid), be by isolated subject with each machine 11～17 therefrom, the operating personnel of they and this cable processing apparatus 1 are kept apart.Here, if constitute each face of described safety head 2 by the parts that for example have the transparency, even allowing safety head 2 become in closed condition covers each machine 11～17 get up, also can pass through these safety head 2 visual each machines 11～17 so, consider it is preferred way from the operation aspect.This safety head 2 is with the whole large-scale lids of getting up that cover of the upper surface of workbench 10, mainly constitutes by the plate-shaped member that constitutes each face with in order to the frame of fixing these plate-shaped members with transparency, and be the heavier lid of weight, detailed icon omits.
Safety head 2 constitutes: when cable processing apparatus 1 is idle, for described each machine 11～17 being maintained etc. shown in solid line among Fig. 1, can make described safety head 2 begin to move towards the top from its closed condition, allow the state that each machine 11～17 exposes (below, claim that also this state is the open mode of lid).That is to say that not to be that armrest is moving carry out in the lifting of safety head 2 on above-below direction, but utilize switching device 3 to carry out automatically.
As Fig. 1, shown in Figure 3, switching device 3 comprises that a pair of being attached at allows the cylinder 31,31 of these safety head 2 liftings and the supply circuit 4 that will supply with each cylinder 31,31 and air is discharged from each cylinder 31,31 as the air that working fluid is used on the safety head 2.
In this embodiment, cylinder 31 is one air only can be supplied with the unidirectional drive cylinder of a side of piston, does the side that piston rod 311 that linear reciprocation moves exists only in cylinder 31.As shown in Figure 1, this cylinder 31 is arranged to press solidly machine 15 and rear side on the upper surface of workbench 10 and described front side and presses solidly near the machine 16 state that its cylinder axis is established along the vertical direction.The leading section of the piston rod 311 of each cylinder 31 is fixed on the safety head 2, safety head 2 constitutes: safety head 2 is accompanied by the piston rod 311 vertical upwards elongations that are in contraction state and rises, safety head 2 is switched to open mode from closed condition, and, as described later, safety head 2 is by the weight of himself, is accompanied by piston rod 311 vertical contractions that are in elongation state down and descends, and safety head 2 is switched to closed condition from open mode.
One of among Fig. 3-5 shown in the example, supply circuit 4 comprise and omit that illustrated air supply source is communicated with mainly supply with road 41 and be located at manual operating valve 42 on this master's supply road 41.Operation valve 42 is a kind of valves of being operated by the operating personnel of operation cable processing apparatus 1 for the lifting of carrying out safety head 2.As shown in Figure 1, this operation valve 42 is arranged on the workbench 10 of cable processing apparatus 1.Operation valve 42 switches to following two states with supply circuit 4, promptly under first kind of state, main upstream side and the downstream of supplying with road 41 is connected with each other, and air is supplied with each cylinder 31 (with reference to Fig. 3); Under second kind of state, cut off the main road 41 of supplying with and to be discharged to (with reference to Fig. 4) in the atmosphere from the air of each cylinder 31.
The main downstream branch that supplies with road 41, and be connected on each cylinder in the described a pair of cylinder 31,31, each branch road 43 is provided with speed control valve 44.This speed control valve 44 is adjusted to the rising or falling speed of the elongation of the piston rod 311 of cylinder 31 and contraction speed or even safety head the speed of regulation.
The downstream of each branch road 43 is connected cylinder cap one side (side that piston rod is not outstanding) of cylinder 31, and so, when by main when supplying with road 41 and each branch road 43 air being fed to cylinder 31, this piston rod 311 just can extend, and as mentioned above, safety head 2 rises.On the other hand, as described later in detail, when by to the handover operation of operation valve 42 and can be with air when cylinder 31 is discharged, piston rod 311 just can shrink under the effect of the weight of safety head 2, and as mentioned above, safety head 2 descends.
On branch road 43, also be provided with the pressure sensor 45 that detects air pressure, this pressure sensor 45 constitutes: when judging pressure according to the air pressure on the branch road 43 and surpassed the threshold value (pressure is lower than the threshold value of regulation) of regulation, just output signal (connection), the details aftermentioned.
Supply with the downstream (that is to say the difference position of branch road 43) on road 41 and operate the magnetic valve 46 that also is provided with the air of changeable supply cylinder 31 between the valve 42 main.This magnetic valve 46 is valves of a changeable abnormal condition that couples together for normal condition that described operation valve 42 and described difference position are coupled together and the bypass 47 that will be set to the described operation valve 42 of bypass and described difference position.Under normal condition, that is to say that as described later, when it was not interfered with barrier etc. when safety head 2 liftings, described magnetic valve 46 was set to normal condition.When magnetic valve 46 was under the situation of normal condition like this and will operates valve 42 and be set at the air feed state, air was supplied to each cylinder 31, and safety head 2 rises, as shown in Figure 3.On the other hand, when magnetic valve 46 was under the situation of normal condition like this and allow operation valve 42 be in exhaust condition, air was discharged from each cylinder 31, and safety head 2 descends, as shown in Figure 4.Like this, utilize just can manual control safety head 2 to the handover operation of operation valve 42 lifting.
With respect to this, be at magnetic valve 46 under the situation of abnormal condition, because the difference position is connected with bypass 47 as shown in Figure 5, so the state of unattended operation valve 42 how, that is to say that when operation valve 42 was in exhaust condition, air also can be through bypass 47 supply cylinders 31 exactly.Therefore, magnetic valve 46 is when normal condition switches to abnormal condition when for example be accompanied by the process that the handover operation of operation valve 42 is descended at safety head 2 in, and by air being supplied with each cylinder 31, piston rod 311 is just reverse to be moved.That is to say that safety head 2 just rises.In addition, the structure of supply circuit 4 is not limited to Fig. 3-structure shown in Figure 5, can also adopt other suitable structure.
Shown in Figure 6 is the example of a structure of control circuit 5.In the figure, symbol 55 representatives have applied the power line of the DC voltage of regulation, and symbol 56 is represented earth connection.This control circuit 5 roughly by the pressure detection circuit portion 51 that comprises pressure sensor 45, with described magnetic valve 46 switch to abnormal condition very circuit part 52, comprise that the cylinder location testing circuit portion 53 of described automatic switch 32 and the involution circuit part 54 that allows described magnetic valve 46 revert to normal condition constitute.
In pressure detection circuit portion 51, the T1 relay is connected on the pressure sensor 45.As mentioned above, when the air pressure on the branch road 43 surpassed the threshold value of regulation, by pressure sensor 45 output signal T1, relay just was energized.Being arranged on T1a switch (relay tip) in the unusual circuit part 52 is accompanied by the energising of T1 relay and connects.
On the other hand, in cylinder location testing circuit portion 53, be connected with the K1 relay on the automatic switch 32, as mentioned above, when piston rod 311 had shunk, by automatic switch 32 output signals, the K1 relay just was energized.The K1b switch (relay tip) that is located in the unusual circuit part 52 is under normal circumstances connected, and this K1b switch is accompanied by the energising of K1 relay and disconnects.
So, in unusual circuit part 52, after described T1a switch and K1b switch were all connected, magnetic valve 46 just switched to abnormal condition.That is to say, magnetic valve 46 safety head 2 be not air pressure on closed condition (K switch 1b connection) and the branch road 43 when surpassing the threshold value of regulation (switch T1a connection) can switch to abnormal condition.
Be provided with manually operated reset switch 57 in involution circuit part 54, this reset switch 57 is carried out making operation, magnetic valve 46 is switched to normal condition.Therefore, this reset switch 57 is one after magnetic valve 46 becomes abnormal condition as mentioned above, in order to allow described magnetic valve 46 return normal condition by the switch of operating personnel's operation.
Next, describe with reference to the working condition of accompanying drawing the switching device of the aforesaid safety head 2 of structure.At first, when allowing safety head 2 risings that are in closed condition, should operate valve 42 by operating personnel's operating operation valve 42 and switch to the air feed state.This moment, magnetic valve 46 was in normal condition.So, supply with each cylinder 31 from the air of (for example adding what main power source just can be worked in advance) air supply source through main road 41, operation valve 42, magnetic valve 46 and each branch road 43 supplied with, the piston rod 311 of each cylinder 31 extends (with reference to Fig. 3) therefrom.Its result, the safety head 2 of closed condition rises, and changes (with reference to the solid line among Fig. 1) towards open mode.Here, for example non-return valve can be located on the supply circuit 4,, also keep the air pressure in the cylinder 31, make safety head 2 stay open state even stop air supply.
When allowing safety head 2 declines that are in open mode,, switched to exhaust condition should operate valve 42 by operating personnel's operating operation valve 42.This moment, magnetic valve 46 was in normal condition.Therefore, as shown in Figure 4, because the air in the cylinder 31 is discharged in the atmosphere through each branch road 43, magnetic valve 46 and operation valve 42, so piston rod 311 shrinks by the weight of safety head 2, safety head 2 descends.In addition, can also on branch road 43, rapid escape valve be set, air is discharged therefrom.
Here, shown in Fig. 7 (a) and Fig. 7 (b) be detected in the process that safety head 2 descends the result of the air pressure value on the branch road 43.Shown in Fig. 7 (a) is the situation that does not descend from open mode towards closed condition with barrier etc. at safety head 2 with interfering.As shown in the drawing, under the situation that safety head 2 does not interfere with barrier etc., air pressure is a certain value in the decline process of safety head 2 substantially.So air pressure can not surpass the threshold value (littler than threshold value) configure in advance, as mentioned above, pressure sensor 45 just can output signal, so magnetic valve 46 can not be switched to abnormal condition.Its result, safety head 2 drops to upper/lower positions and becomes closed condition.In addition, when safety head 2 drops to upper/lower positions and when becoming closed condition, air pressure can surpass the threshold value that configures in advance, but because automatic switch 32 is connected, K switch 1b disconnects, so magnetic valve 46 can not be switched to abnormal condition (with reference to Fig. 6).
With respect to this, shown in Fig. 7 (b) to be safety head 2 with barrier etc. interfere the time air pressure.Under the situation that safety head 2 and barrier etc. interfere, barrier becomes the resistance that safety head 2 descends, and air pressure will change.Therefore air pressure surpasses the threshold value (less than threshold value) of regulation.In this case, because pressure sensor 45 output signals, so switch T1a connects (at this moment, because automatic switch 32 disconnects, so K switch 1b connects), magnetic valve 46 switches to abnormal condition (with reference to Fig. 5, Fig. 6).As shown in Figure 5, if magnetic valve 46 switched to abnormal condition,, also can be supplied to each cylinder 31 through bypass 47 from the air of air supply source, so piston rod 311 elongations even then operation valve 42 is in exhaust condition.That is to say, safety head in the decline 2 reverse moving and rising, safety head 2 becomes open mode.So, the safety head 2 in descending just can prevent that operating personnel from being clamped in possible trouble by safety head 2 by safety head 2 reverse moving when for example operating personnel interfere.In addition, when safety head 2 becomes under the action of such safety device after the open mode when this safety head 2 switched to closed condition,, allow magnetic valve 46 involutions be normal condition by reset switch 57 is carried out making operation.By allowing operation valve 42 become exhaust condition like this, just can allow safety head 2 descend.
In the switching device 3 of the safety head 2 under this structure, detect the interference situation of safety head 2 and barrier by the variation that detects the pressure on the supply circuit 4 of air being supplied with and being discharged from cylinder 31.Therefore, directly detect safety head 2 and barrier the interference situation, sensors such as area sensor, limit switch, Proximity Sensor have not just needed, and problem can not take place yet at the detection dead angle of the following issuable sensor of the situation that has disposed such sensor.That is to say no matter barrier in which position and safety head 2 interferes, this barrier all can become under the such situation of the resistance of safety head 2 down maneuvers, and the air pressure on the supply circuit 4 can change.For example, when the downside barrier that is being in decline process safe lid 2 and this safety head 2 interfere, air pressure on the supply circuit 4 can change certainly, be exactly safety head 2 in decline from the side under the such situation of pressurized, the air pressure on the supply circuit 4 also can change.Therefore, can be reliably and precision detect the interference situation of safety head 2 and barrier well.And, because only can detect the variation of air pressure,, be favourable so can constitute safety device at an easy rate with a pressure sensor 45.
Described pressure sensor 45 has the structure of a meeting output signal when air pressure surpasses the threshold value that configures in advance, even so make a pressure sensor simple in structure, also precision detects the interference situation of described safety head 2 and barrier well as mentioned above.In this case, although when safety head 2 moves to upper/lower positions, pressure sensor 45 also can output signal, but this output signal does not represent to have taken place interference, therefore, still the automatic switch 32 of this pressure sensor 45 and the position of detecting cylinder 31 to be combined use, could get rid of flase drop reliably and survey, interfere accuracy of detection to improve thereby can make.In addition, the position of the piston rod 311 in the cylinder 31 is not limited to be detected by automatic switch 32, can also utilize that for example limit switch, Proximity Sensor etc. detect.Under this structure, when safety head 2 moves to upper/lower positions the safety device work that do not allow, so when safety head 2 is positioned at upper/lower positions, can form certain clearance between the upper surface of its lower end and workbench 10, for example operating personnel's finger can not clamped so big sizeable gaps such as gap.
(other embodiment)
In addition, under described structure,, make safety head 2 reverse mobile, but in addition, also can allow safety head 2 stop when detecting safety head 2 and barrier when interference has taken place.This can realize by the structure that changes described magnetic valve 46.
Under described structure, the pressure of the air on the supply circuit 4 as detected parameters, but is not limited to this, can also be with the flow of the air on the supply circuit 4 as detected parameters.That is to say that in the process that safety head 20 descends, the flow of air is necessarily constant under the normal condition, but when interference had taken place for safety head 2 and barrier, the same flow with pressure can change also.Hence one can see that, by detecting the variation of flow, also just can precision well the interference situation of safety head 2 and barrier be detected.Here, flow detection sensor can be arranged in than operation valve 42 also under suitable position, downstream on (as mentioned above,, preferably flow sensor being located on the position of this rapid escape valve in addition) being provided with under the situation of rapid escape valve.And, can also be that relevant suitable parameter detects to the suitable parameter relevant with air pressure on the supply circuit 4 or with flow.
Under described structure, the hardware-type structure that allows control circuit 5 constitute to contain relay, but moreover can also allow the control circuit be a software-type circuit that processor and software are combined.As long as this circuit is accomplished, processor basis according to control program work judges from the signal of pressure sensor 45 with from the signal of automatic switch 32 whether two signals are output, when two signals all were output, the signal that output is used for magnetic valve 46 is switched to abnormal condition got final product.Be used in combination such software-type circuit and the pressure sensor of for example exporting the air pressure value on the supply circuit 4 seriatim, be convenient to calculate the rate of change of the detected pressure value of this sensor.Shown in the example among Fig. 7 (b), when interference had taken place for safety head 2 and barrier, rate of change may be owing to force value becomes greatly, therefore, in the time of can surpassing the threshold value of regulation at the rate of change of force value, detect safety head 2 and barrier this situation has taken place to interfere.And, in such software-type circuit, can also allow described operation valve 42 constitute magnetic valve, by this circuit controls magnetic valve.That is to say, can switch the operational circumstances of for example console switch state according to operating personnel by described circuit, with the lifting of handover security lid 2 to described magnetic valve.
Under described structure, the variable quantity of the air pressure on the supply circuit 4 signal of telecommunication as pressure sensor 45 is taken out, but in addition, this situation of threshold value that the air pressure on the supply circuit 4 can also be surpassed regulation as mechanicalness action take out.In this case, this mechanicalness action is passed to control valve (corresponding to the valve of described magnetic valve 46) through for example chain mechanism, and this state is switched, just can realize the reverse mobile of safety head 2.
Under described structure, make cylinder 31 be the unidirectional drive cylinder, but in addition, can also allow this cylinder be the bi-directional drive cylinder.In this case, also be to detect the interference situation of safety head 2 and barrier by detecting the situation of change of in the course of work of cylinder 31 air pressure on supply circuit or flow.As allowing the execution unit of safety head 2 liftings, be not limited to cylinder 31, this execution unit can also be an oil cylinder for example.That is to say that the working fluid that supply circuit 4 is supplied with is not an air, but work oil.
Here, safety head 2 with cable processing apparatus 1 is that example illustrates present technique, but technology disclosed herein is not limited to the safety head 2 of cable processing apparatus 1, technology disclosed herein can be widely used in places such as mainly being included in factory make, process, be shaped and the industrial equipment of manufacturing installation, processing unit (plant) and the working equipment etc. of processing etc. in as safety device etc.As shown in Figure 1, in this industrial equipment, safety head is not limited to the covering (lid) that all be surrounded with the part that operating personnel keep apart, and safety head can also be for example door leaf (door), shutter.
Like this, the slider as the general name of lid, door and shutter etc. is not limited to said structure lifting along the vertical direction (moving), and this slider can also be one and follow the usual practice as the structure of horizontal direction slippage.It for example can be the such structure that can launch or roll of shutter.As long as the action situation of execution unit is done suitable setting according to the motion conditions of slider.Therefore, be not limited to the same piston rod with said structure as execution unit and do the linearity reciprocating motion, can also adopt supply and non-supply according to working fluid is that the such execution unit of oscillating motion is carried out at the center with the axle of stipulating.
Industrial applicibility
In sum, the switching device of slider disclosed herein is realized reliably and accurately detecting the interference situation of slider and barrier for cheapness, thus can carry out reliably slider stop or the safety device of reverse movement of great use.
Claims (5)
1. the switching device of a slider is characterized in that:
The switching device of this slider comprises:
Slider, this slider in industrial equipment, stipulate by between isolated subject and the operating personnel, be used for being kept apart mutually by isolated subject and described operating personnel with described,
The cylinder execution unit, this cylinder execution unit is bound up on the described slider, utilize fluid pressure to allow described slider move to described closed condition of being isolated with between to described open mode of not isolated by isolated subject and described operating personnel by isolated subject and described operating personnel
Supply circuit, this supply circuit is connected with described cylinder execution unit, and working fluid is supplied with this cylinder execution unit,
Functional unit, this functional unit is arranged in the described supply circuit, and this functional unit allows the work of described cylinder execution unit by control to the supply of the described working fluid of described cylinder execution unit, moves between described closed condition and open mode to guarantee described slider
Pressure or the relevant parameter of flow with described working fluid detected at detection part, this detection part assigned position place on described supply circuit, and
Control assembly, when by the detected parameter of described detection part variation having been arranged in the process that between described closed condition and described open mode, moves by operation described functional unit described slider, this control assembly control is to the supply of the described working fluid of described cylinder execution unit, to guarantee that described slider stops or reverse moving.
2. the switching device of slider according to claim 1 is characterized in that:
Described control assembly constitutes: when the value by the detected parameter of described detection part has surpassed the threshold value that configures in advance, this control assembly is just controlled the supply to the described working fluid of described cylinder execution unit, to guarantee that described slider stops or reverse moving.
3. the switching device of slider according to claim 2 is characterized in that:
The switching device of this slider also comprises: detecting described slider is not the state-detection parts of described closed condition or described open mode,
Described control assembly constitutes: what detected described slider by described state-detection parts is not closed condition or this situation of open mode and when by the value of the detected parameter of described detection part variation having been arranged, this control assembly control stops or reverse moving to guarantee described slider the supply of the described working fluid of described cylinder execution unit.
4. the switching device of slider according to claim 1 is characterized in that:
Described control assembly constitutes: when the rate of change by the detected parameter of described detection part had surpassed the threshold value that configures in advance, this control assembly control stopped or reverse moving to guarantee described slider the supply of the described working fluid of described cylinder execution unit.
5. according to the switching device of the described slider of each claim in the claim 1 to 4, it is characterized in that:
Described slider constitutes lifting along the vertical direction,
Described cylinder execution unit has piston rod, the supply that this piston rod is accompanied by described working fluid with discharge on above-below direction elongation and shrink, and allow the lifting between open mode and closed condition of described slider,
Described control assembly constitutes: when at described slider just when described open mode has had variation by the value of the detected parameter of described detection part towards the process that closed condition moves, this control assembly control stops or reverse moving to guarantee described slider the supply of the described working fluid of described cylinder execution unit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010024102A JP5616646B2 (en) | 2010-02-05 | 2010-02-05 | Safety cover opening and closing device |
| JP2010-024102 | 2010-02-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102152164A true CN102152164A (en) | 2011-08-17 |
| CN102152164B CN102152164B (en) | 2015-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010616274.5A Active CN102152164B (en) | 2010-02-05 | 2010-12-30 | Isolator switching device |
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| Country | Link |
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| JP (1) | JP5616646B2 (en) |
| CN (1) | CN102152164B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106891199A (en) * | 2015-12-18 | 2017-06-27 | 发那科株式会社 | Lathe |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6841731B2 (en) * | 2017-07-03 | 2021-03-10 | 新明和工業株式会社 | Elevating safety cover device and electric wire processing device equipped with it |
| WO2021090396A1 (en) * | 2019-11-06 | 2021-05-14 | 株式会社 エー・アンド・デイ | Balance scales windshield |
| WO2022059101A1 (en) * | 2020-09-16 | 2022-03-24 | 株式会社 エー・アンド・デイ | Windshield for electronic balance |
| JP7402596B2 (en) | 2020-12-03 | 2023-12-21 | 株式会社エー・アンド・デイ | Windshield for electronic balances |
| CN113579834B (en) * | 2021-08-20 | 2022-06-28 | 中国机械总院集团海西(福建)分院有限公司 | Numerical control machine tool with automatic cleaning and collecting functions |
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| JPH0642044U (en) * | 1992-11-24 | 1994-06-03 | オークマ株式会社 | Automatic door with sub door |
| JPH09229873A (en) * | 1996-02-21 | 1997-09-05 | Sumitomo Metal Ind Ltd | Method and apparatus for detecting abnormality of bite |
| US6324880B1 (en) * | 1999-04-28 | 2001-12-04 | Nissan Motor Co., Ltd. | Method for hemming and hemming system |
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| CN106891199A (en) * | 2015-12-18 | 2017-06-27 | 发那科株式会社 | Lathe |
| CN106891199B (en) * | 2015-12-18 | 2019-08-06 | 发那科株式会社 | Lathe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5616646B2 (en) | 2014-10-29 |
| CN102152164B (en) | 2015-03-04 |
| JP2011161531A (en) | 2011-08-25 |
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