WO2002022478A2

WO2002022478A2 - Charging and discharging device for material in the form of a roll and a combination of a printing device and a charging and discharging device

Info

Publication number: WO2002022478A2
Application number: PCT/EP2000/013331
Authority: WO
Inventors: Mario Gandini
Original assignee: Durst Phototechnik Ag
Priority date: 2000-09-15
Filing date: 2000-12-29
Publication date: 2002-03-21
Also published as: ITBZ20000039A1; US20040011914A1; EP1318963A2; WO2002022478A3; AU2001226770A1; EP1318963B1; JP2004509036A; DE50009686D1; ITBZ20000039A0; ATE289970T1; IT1316141B1

Abstract

The invention relates to a charging and discharging device (10) for material in the form of a roll (34) embodied in the form of a carriage which is operated by a single user and comprises a bearing (16) for each lateral termination of a roll (34). The bearings can be raised and lowered and can be locked at least in a raised position.

Description

Loading and unloading device for roll material and combination of a printing device with a loading and unloading device

Technical field

The invention relates to a loading and unloading device for roll material and a combination of a printing device with such a loading and unloading device.

In the field of printing technology, there are often applications in which a medium that is in the form of roll material is to be printed. In other words, the medium to be printed is fed to a printing device in the form of a wound roll, from which the printing device unwinds the medium. At the output side of the printing device, the medium now printed is in turn wound up on a roll. The rolls to be fed to the printing device can have diameters of up to 30 cm and are accordingly heavy. State of the art

Up to now, the loading and unloading of printing devices, and in particular of ink-jet printing devices, has either been carried out by a crane, by means of which the roller was placed in a suitable mounting of the printing device or removed therefrom. Alternatively, loading systems are known in which the operation must be carried out by two people who insert the roll into the bearing of the printing device on both sides of the roll or at least monitor this. Such systems are comparatively complicated and require a special arrangement of the printing device with respect to the crane, in particular if the loading and unloading is carried out by means of a crane. Alternatively, if loading and unloading is carried out by two operators, this is relatively expensive due to the comparatively high workload.

Presentation of the invention

The invention has for its object to provide a loading and unloading device for roll material, by means of which the loading and unloading of roll material on printing devices can be simplified and made more cost-effective.

This object is achieved by the loading and unloading device described in claim 1.

Accordingly, on the one hand, the device is designed in such a way that it can be moved by a single operator. For this purpose, the loading and unloading device is a trolley educated. Accordingly, the loading and unloading device accordingly has rollers and a handle or similar device, by means of which the loading and unloading device can be operated by an operator even in the state that there is a comparatively heavy role in the loading and unloading

Unloading device is located, is movable. In order to mount the roll to be fed to or removed from a printing device, the loading and unloading device has a bearing for both lateral ends of the roll. The bearings can be raised and lowered and locked at least in the raised position.

Here, the mechanism that allows the roller to be raised and lowered is designed so that it can be accomplished by a single operator. This is possible, for example, by providing one or more levers. The roller bearing of the loading and unloading device is advantageously designed such that it is adapted to the position of the roller bearing of a printing device. In other words, the lowered position of the lateral roller bearings is provided in such a way that the roller is transferred to the mounting of the printing device in this position. If an unloading of a full roll is intended, the loading and unloading device is moved under the roll stored in the printing device, and the loading and unloading device takes over the roll by lifting the bearings.

Finally, the bearings of the loading and unloading device according to the invention can be locked at least in the raised position. This ensures that a roll that has been removed from a printing device and is to be moved to a different place is safe in the raised position remains. Likewise, until the point in time at which a roll is to be loaded into the bearing of the printing device, it is ensured that it remains in the raised position, which can be referred to as the transport position.

The orientation of the loading and unloading device with respect to the roll to be removed from a printing device or with respect to the roller bearing of the printing device to which a roll is to be transferred can be carried out, for example, by stops provided on the printing device in a suitable manner. By means of the invention, even heavy rolls of material, which previously had to be handled by means of a crane or with the help of two or more operators, can be transferred to a printing device in a simple manner or taken over by the latter. A roller can be inserted into the loading and unloading device according to the invention in a locally distant area, from where the roll can be brought to the printing device by a single operator by means of the movable loading and unloading device according to the invention and loaded into its storage ,

Preferred developments of the invention are described in the further claims.

For a simple construction of the loading and unloading device according to the invention, there are advantages if the two lateral bearings can be raised and lowered separately from one another. In principle, it is in fact possible that the two bearings are connected to one another, and can thus be raised and lowered by a single actuation process. However, this requires a comparative stable connection of the two bearings with each other, which must extend in particular over the entire roll width, which can be of the order of a few meters. In contrast, it is preferred according to the invention to design the two mountings to be raised and lowered separately from one another, so that the mounting on one side and then the mounting on the other side can be moved by a single operator.

In experiments, actuation of the bearings by levers has proven to be particularly advantageous. As a result, in particular a comparatively large lever arm of the actuating lever can be used so that a single operator can effortlessly feed even heavy rolls by lowering the bearings to a printing device, or can remove a printed roll by lifting the bearing from the printing device.

With regard to the bearings, a construction is conceivable in which the bearings remain in the lowered position due to their own weight. However, there are advantages if the bearings can also be locked in the lowered position. This ensures a defined position of the bearings, even if there is no role in them. If levers are used to actuate the bearings, the bearings can be locked in the lowered position, for example, by locking or locking the levers in their correspondingly raised state.

Both for the last-mentioned locking of the bearings in their lowered position and for the locking of the bearings in accordance with the invention its raised position, it is advantageous if for this purpose at least one locking element is provided which is biased into the closed position and which has a bevel pointing away from the locking position. This embodiment makes it possible for an actuating element, for example a lever, intended for the movement of the bearings, starting from an unlocked position when moving in the direction of the locked position, to first meet the bevel formed on the locking element and briefly apply the locking element against the presses on the locking element biasing force in its open position. After the actuating element has passed the locking element, the locking element snaps back into its closed position and prevents the locking element from getting out of locking. Preferably, no bevel is provided on the side of the locking element directed towards the locking position, so that unlocking can only take place when the locking element is actively actuated.

According to a further aspect, the invention relates to a combination of a printing device with a loading and unloading device in one of the embodiments described above. As can already be seen from the preceding description, the loading and unloading device according to the invention, with regard to the position of the bearings, in particular in their lowered position, must be adapted to the mounting of a printing device, so that when a printing device is loaded with a roller, the role of the storage of the loading - And unloading device is transferred to the storage of the printing device in a defined manner. The correct positioning of the loading and unloading device for this process, for example, by means of suitable stops on the printing device, to which the loading and unloading device can be placed. In this case, the correct positioning of the roller in the lateral direction will take place, for example, by a stop of the carriage on that side of the printing device on which the mounting of the printing device is designed such that the roller is in a defined position with respect to its width.

For safe operation of a printing device in connection with the loading and unloading device according to the invention, there are advantages if the printing device in the vicinity of the roller bearing has a securing element which prevents the roller from escaping in a first position. This is particularly advantageous on the side of the printing device on which a printed roll is wound up, since the roll is driven on this side, and the winding process can lead to forces and moments which act on the roll in such a way that in the worst case this can occur their storage emerges. Essentially, the securing element provided on the printing device is designed in such a way that the roller, which is located in the bearing, abuts the securing element when it is raised and is accordingly secured against escaping. However, the roll must be removed when loading and unloading. So that in this case the securing element is not a hindrance, it is designed and attached to the printing device in such a way that the loading and unloading device according to the invention move the securing element away during loading and unloading can be that a roll can be inserted into or removed from the bearing of the printing device.

In this case, the securing element is preferably designed to be pivotable, so that when the carriage is retracted it is pivoted in such a way that the removal or supply of the roller is no longer hindered. As soon as the loading and unloading device according to the invention is removed from the printing device, the securing element swivels back and secures the roller against undesired escape of the same.

Brief description of the drawings

The invention is explained in more detail below on the basis of an embodiment shown as an example in the drawings. Show it:

1 shows the loading and unloading device according to the invention in a perspective view;

2 shows the loading and unloading device according to the invention in a front view;

3 shows the loading and unloading device according to the invention together with a roller mounted therein and the roller bearing of a printing device; and

Fig. 4 is a side view of the loading and unloading device according to the invention together with part of a printing device. Detailed description of the preferred embodiment of the invention

As can be seen in FIG. 1, the loading and unloading device 10 according to the invention is essentially designed as a carriage which can be moved by means of rollers 12 and has a rectangular base frame 14. On the one hand, respective supports 16 are attached, into which a roller with both lateral ends can be inserted. The bearings 16 each have a recess into which the roller can be inserted by means of its lateral bearing pins. The two bearings 16 are rotatably supported in pedestals 18 which are fixedly attached to the frame 14. The mounting is carried out in each case by means of axes of rotation 20. The actuation of the two mounting 16 is accomplished by means of a separate lever 22 for each of the two mounting 16. Due to the fact that the lever is of considerable length with respect to the axis of rotation 20 and the end of the lever is significantly more distant from the axis of rotation 20 than the bearing 16, a single operator can also easily lift heavy rollers due to the large lever arm of the lever , This takes place starting from the position of the bearings 16 shown in FIG. 1 by the movement of the lever 22 downward, so that the bearing 16 accordingly moves upwards. Such actuation is required, for example, when unloading a printed roll of material from the printing device.

Specifically, each of the two levers 22 is moved separately from one another in the embodiment shown. By suitable locking elements 24, which are described in more detail below, each of the two levers 22 in the raised position of the bearing 16 can be locked. After the storage of the one side and subsequently the storage of the other side have thus been raised so that the roller has been lifted one after the other from the mounting of the printing device, the roller with the loading and unloading device according to the invention can be unloaded from the printing device when the bearings are raised and can be moved to any position. For this purpose, in the embodiment shown, a handle 26 is provided on the loading and unloading device according to the invention, by means of which a single operator can move the loading and unloading device according to the invention. Advantageously, at least two of the rollers 12 can be designed to be pivotable, so that the loading and unloading device according to the invention can be rotated and moved in any direction.

Finally, it should be noted that in the embodiment of a loading and unloading device 10 shown, locking devices 28 are also provided for the position in which the bearings are in the lowered state. In the position shown in FIG. 1, however, the locking devices have not yet been moved beyond the locking devices 28, in other words have not yet been pivoted upwards far enough to be locked or locked by these locking devices 28. Between the two locking positions, that is, the position below the locking element 24 and the position above the locking element 28, the two levers are each guided in a square tube with an elongated hole. The locking elements 24, 28 are biased into the closed position. It can be seen in FIG. 2 that the locking elements each advantageously have a bevel 30 pointing in the direction of the unlocking position. As a result, the respective lever 22 can be moved downward, for example, from its raised position shown in FIGS

Locking element 24 hits, presses it into the open position and can step past it. As soon as this has happened, the locking element 24 snaps back and in particular prevents the unwanted unlocking of the respective lever due to the design that is not bevelled on this side. If the bearing is to be lowered starting from the raised position, the locking element can be laterally displaced on both sides in succession by an actuating pin 32, so that the lever can move upwards and the bearing is lowered. In this way, for example, a new roll with roll material can be transferred to a printing device. The locking elements of the upper locking devices 28 are designed in a similar manner, so that the levers can be locked in a defined, upper position after the bearings have been lowered.

3 additionally shows how the loading and unloading device 10 according to the invention interacts with the roller bearing 38 of a printing device. A roller 34 is indicated in FIG. 3, which is to be transferred to the roller bearing 38 of a printing device. The roller 34 can, for example, by means of a crane, the traction means of which can be suspended in crane eyes 36, in the loading and Unloading device can be inserted. By means of the loading and unloading device according to the invention, the roller is moved to the position arranged in FIG. 3 on the roller bearing 38 of a printing device. Here, the roller 34 is moved into a defined position in that a stop 40 of the loading and unloading device according to the invention is brought into contact with a section of the printing device. The position of the roller 34 is defined in this direction by a further stop, which defines the position of the loading and unloading device according to the invention in its direction of travel.

As soon as the required position is reached, the roller 34 can be brought into the position shown in FIG. 3 by lowering the two bearings 16, which is done by actuating the two levers 22. In this position, a wheel 42 provided on the side of the roller 34 is inserted into the roller bearing 38 of the printing device and is therefore in a defined position. In particular, the position in the lateral direction can be defined in that the roller bearing 38 of the printing device has rollers which have a groove into which the comparatively narrow side rollers 42 of the material roller 34 are inserted. As mentioned, the two levers 22 can be raised further compared to the position shown in FIG. 3, so that they are held in an upper position by the upper locking devices 28. This also ensures in the event that the dead weight of the lever 22 would raise the bearing 16 by rotation about the pivot point 20, as soon as the roller was transferred to the printing device, that the bearing would remain in its lowered position, for example Starting from this position, a printed roll can be unloaded from the printing device.

4 shows a measure on a printing device which is loaded and unloaded by the loading and unloading device according to the invention, which measure advantageously ensures that the inserted roll is secured and at the same time loading and unloading with the aid of the loading according to the invention - And unloading device 10 not hindered. In the area of the printing device in which the roller bearing 38 is provided, a securing element 44 is provided on the printing device such that it can pivot about an axis 46. The securing element 44 is located above the lateral bearing roller 42 of the material roller 34 with respect to the axial direction of the roller 34 (ie the direction perpendicular to the plane of the drawing in FIG. 4). This means that the securing element is in its working position above the roller 42 in such a way that the latter cannot step out of their storage. The working position of the securing element 44 results from the position shown in FIG. 4 by a slight pivoting in the clockwise direction.

4 shows the position of the securing element 44 in which a section of the carriage, in the case shown a bearing block 18, has pivoted the securing element 44 by engagement with an actuating section 48 of the securing element 44. This pivoting is necessary so that the loading and unloading of the material roll 34 is not hindered by the loading and unloading device 10 according to the invention. Essentially, the bearing block 18 bumps into the loading and unloading device according to the invention Actuating section 48 and pivots the securing element 44 a little to the rear (to the right according to FIG. 4). In this position of the securing element 44, the roll 34 is no longer hindered from the bearing 38, so that the roll can be removed or a new roll can be fed. As soon as, for example, a new roller has been transferred to the roller bearing 38 of the printing device and the loading and unloading device 10 has been removed, the securing element 44 swivels back due to its own weight, and a section of the securing element 44 is located above the lateral roller 42 of the material roller 34 such that it cannot escape unintentionally. Overall, this creates a safe and at the same time simply constructed loading and unloading device in combination with an adapted pressure device, which enables heavy material rolls to be loaded and unloaded by a single person.

Claims

claims

1. loading and unloading device (10) for roll material, which is designed as a carriage that can be moved by a single operator and each has a bearing (16) for both lateral ends of a roll (34), the bearings (16) lifting - And can be lowered and locked at least in the raised position.

2. Loading and unloading device according to claim 1, characterized in that the bearings (16) can be raised and lowered separately from one another.

3. Loading and unloading device according to claim 1 or 2, characterized in that the bearings (16) are each operable by a lever (22).

4. Loading and unloading device according to at least one of the preceding claims, characterized in that the bearings (16) additionally in the lowered

Position can be locked.

5. Loading and unloading device, characterized by at least one of the preceding claims, wherein at least one pretensioned in the closed position locking member (24, 28) is provided which has a ^• of the locking position of pointing away bevel (30).

6. Combination of a printing device with a loading and unloading device according to at least one of the preceding claims, characterized in that the printing device in the vicinity of its roller bearings (38) has a securing element (44) which prevents the roller (34) from escaping and through the loading and unloading device (10) can be moved during loading and unloading in such a way that a roller (34) can be inserted and removed.

7. Combination of a printing device with a loading and unloading device according to claim 6, characterized in that the securing element (44) is designed to be pivotable.