DE2918699A1 - Flat workpiece stacker and unstacker - has lifting forks tilting between vertical and horizontal position on shaft - Google Patents

Abstract

The machine automatically stacks flat workpieces, having a frame with parallel roller conveyors and a sliding mechanism with suction cups. Between the conveyor (2) for the stack and each one (10, 10') handling the individual workpieces (4) is a horizontal shaft running parallel to the conveyor tracks. Arms (12) are spaced apart to form a fork which can tilt between horizontal and vertical positions. The shaft also moves up and down in vertical guides. The slides on which the shaft is mounted can be coupled to a rope or chain (13).

Description

Title:

"Device for automatic stacking and destacking plate-shaped Workpieces "The above invention relates to a device for automatic Stacking and destacking of sheet-shaped workpieces.

It is known that in modern processing lines for chipboard, which are mainly used for the nesting of idoobes, Sinrichtun come into use, with which the plate-shaped workpieces are stacked or can be stacked.

Most of these stacking devices have a frame, the one assigned to the first roller conveyor that works with a lifting device, with which the stack of plates is gradually lifted according to the removed plates will. It is also possible to slowly lower the lifting device, provided that the stacking height increases due to newly stacked plate-shaped workpieces.

In the interior of the aforementioned JjaschinengesteleS is also usually a second roller conveyor is provided, which is similar in height to the first roller conveyor staggered level is arranged.

The second roller conveyor, which is generally used for transport single plate-shaped workpieces are provided, a second lifting device is assigned, with which the individual plates from the second roller conveyor to a transmission device, which is usually provided with suction cups. It is also possible, that the itub device assigned to the second roller conveyor, that with the transmission device picks up moving plates and these, during the downward movement on the second The roller conveyor.

Usually, the known transmission device is from a Fahrges. ~ »Ell formed by horizontally arranged rails of the machine frame is recorded. The transmission device can carry out a back and forth travel movement, between the first roller conveyor, which receives the stack of panels, and the second Carry out the roller conveyor provided for the transport of the individual p] atten.

Another known stacking and stacking device for plate-shaped Work piece has a number of horizontally arranged forks that continuously or intermittently according to the paternoster principle. Everyone is for this of the forks articulated in one plane in two different articulation points with two connected in closed chain circles, whereby it is achieved that the above- Forks are always moved in a horizontal plane.

This known Ausfuehrungsforn has the disadvantage that it is relatively is costly. Furthermore, due to the need to split the forks in two from each other distant points always in a horizontal arranged level to store, there is a considerable need for this known stacking and stacking device Space requirement, which is not always available, mainly if this is known Installation in already existing processing lines for chipboard or similar plate-shaped workpieces are to be installed.

It is another device for stacking and destacking of plate-shaped Workpieces known in which a number of forks articulated with an endless one Chain is connected. In this known device, the fork arms are from a Rest position in a horizontal working position, with the help of Cams, control cams and similar tools brought. These elaborate Control means contribute to the fact that the known device has a considerable constructional and involves costs and is not entirely insensitive to disruptions is.

Another disadvantage inherent in this known device, can be seen in the fact that the stacking or

Destacking process actually only for plate-shaped workpieces limited dimensions is feasible.

Another disadvantage of all stacking and stacking systems described above. Destacking devices adheres to the fact that it is without any significant widening of the middle part of the machine frame is not possible, plate-shaped workpieces to lay down on two roller conveyors arranged in parallel next to each other or from these take off, and provide that these two roller tracks a further, centrally arranged roller conveyor is assigned, which receives the stack of panels.

The object of the above invention is to overcome the disadvantages of the above Avoid prior art and a device for stacking or destacking to create plate-shaped workpieces that are simple but robust in structure, which has a reduced overall width and offers the possibility, provided this should be necessary, the plate-shaped workpieces on two roller conveyors to store or remove from two roller conveyors, with between the two roller conveyors another single, centrally arranged roller conveyor for receiving the stack of panels is provided.

The task according to the invention is achieved in that between the roller conveyor for holding the stack of panels and each roller conveyor for the Transport of the individual plate-shaped workpieces, one horizontally and in parallel arranged to extend the roller conveyor longitudinal shaft is provided with im Arms arranged at a distance from one another are equipped to form a fork, that this shaft is pivotably mounted to said fork arms from a horizontal Position in a vertical position and vice versa and that the with Fork arms equipped shaft displaceable, to carry out an up and down movement, vertical guides.

Other features of the invention can now be as follows Description, as well as the subclaims.

The device according to the invention is now based on an exemplary embodiment described in more detail and shown schematically in the drawings.

1 shows a schematic view of the device according to the invention; FIG. 2 schematically shows a top view of the device according to FIG. 1; Fig. 3 shows a detail of the bearing for the shaft fitted with fork arms; Fig. 4 shows a detail of the shaft shown in Fig. 3, partly in section along the line IV-IV of Figure 3; Fig. 5 shows schematically the sequence of movements with fork arms equipped shaft, when using the device as a loading device; Fig. 6 shows schematically the sequence of movements of the shaft when using the invention Device as a stacking device.

As can be seen from FIG. 1, there is the overall designated 1 Device from a frame, which has a first roller conveyor 2, the one Device 3 for lifting or gradually lowering a stack of panels 4, 5 is assigned.

The plates 4 are removed from the stack 5 or

deposited on stack 5.

For this purpose a device 6 provided with suction cups 7 is provided, which is carried by a carriage 8 which can be moved in the transverse direction.

The car or cars 8 are e.g. movable through the upper horizontal ones Cross member 9 of the machine frame 1 was added.

The device 6, 8 equipped with suction cups 7 can move in translation from the position shown with solid lines (right side of Fig. 1) in the position 6 'shown with dashed lines (left side of Fig. 1) carry out.

To the side and parallel to roller conveyor 2 is another roller conveyor 10 is provided, but this second roller conveyor 10 is arranged in a higher position Plane provided as the roller conveyor 2.

Between two columns 11 of the machine frame 1 is one with forks 12 equipped device 16 is provided, which will be described in more detail later.

The device 16 equipped with forks 12 can move upwards and downwards below (arrow f in Fig. 1), with the aid of chains 13 in the columns 11 are provided to be moved.

Each chain 13 is at the bottom as well as at the top of the pillars 11 guided by drivable chain wheels 14 and 15.

During the machine frame 1 as well as the one equipped with suction cups 7 Carriages 6, 8 and roller tracks 2 and 10 generally belong to the state of technology, is the equipped with forks device 12, 16 together with their drive and Tax means new and inventive.

This device allows the known stacking or. Stacking devices to improve considerably for plate-shaped workpieces.

; with reference to Figs. 2, 3, 4, 5 and 6, this novel, with forks equipped device described in more detail.

As already mentioned, extends between the roller conveyor 2 and the roller conveyor 10 over the entire length of a pivot shaft 16, which with fork-shaped arms 12 is fitted (Fig. 2).

The shaft 16 is mounted in such a way that it swivels can perform around its longitudinal axis, thus the arms 12 both in a vertical as well as in a horizontal position (see also Fig.

3), with the fork-shaped arms 12 in the horizontal position, these come to rest between the conveyor rollers of the roller conveyor 10.

To enable the shaft 16 to swivel, this shaft 16 is arranged in a bearing block 17 with a guide piece 18 is connected. At each end of the shaft 16 is one of these bearing brackets 17, as well one of the guide pieces 18 is provided.

Each Fuehrungsstueck 18 is displaceable on a vertically arranged Guide rod 19 arranged with the corresponding column 11 of the machine frame 1 is firmly connected. For this purpose is the top and bottom of each guide rod connected to onsoles 20, for example by welding with the vertical Pillars 11 are connected.

The bearing and guide pieces 18 are also about small protruding Connecting arms 21 connected to a chain 13, which is guided by chain wheels 14, 15 and is driven. Each guide piece 18 also has a Console 22, which has a hydraulic piston-cylinder unit 23 or a similar Receives drive means. The piston rod 24 of the piston-cylinder unit 23 is stationary articulated with a lever arm 25 which is connected to the shaft 16.

With this lever arm 25 and the piston rod 24, the shaft 16, and the forked arms 12 are given a pivoting motion.

For the sake of simplicity, the pivoting device has been shown in FIG (23, 24) and the lifting device (18, 19) for the shaft 16 and the fork-shaped Arms 12 are only shown for one column 11, but it goes without saying that that the same components are also used for the second column 11 on the opposite side Side of the machine frame 1 is arranged, are provided.

Should the device described so far be two parallel next to each other arranged roller conveyors 10 are assigned, so it is necessary to have another Roller conveyor 10 (shown in Fig. 1 with dash-dotted lines) on the right-hand side of the plate stack 5 to be provided.

In this case it would also be necessary in the associated rack column 11 a further device for controlling and actuating a further pivotable and shaft 16 equipped with forked arms 12. This second Wave 16 would have to be carried out in its structure, as already described above. Further the cross member 9 would be to accommodate the movable carriages 6, 7, 8 to the right (Fig.l) to extend over the roller conveyor 10 '.

The device according to the invention works as follows: Should the device are used as a feeder (Fig. 5), the fork arms 12 of the pivot shaft 16 in a horizontal position, under the plate-shaped workpiece 5, which is from the Stack 5 has been lifted and the carriage 6 equipped with suction cups 7 has moved out of position 6 was moved into the position 6 ', arranged. The plate-shaped workpiece 4 is placed in this position on the fork-shaped arms 12 and remains in a horizontal position, while the arms 12 by actuating the chain 13 after wander down and place the plate 4 on the rollers of the roller conveyor 10.

Then, by pivoting the shaft 16 by gOo, the Arms 12 brought into their vertical position (shown with dash-dotted lines Position) to be in this vertical position again, together with the pivot shaft 16 to be moved upwards.

As soon as the free ends of the arms 12 emerged from the plane of the plate 4 are, the shaft 16 is pivoted again in the opposite direction by 90 °, whereby the arms 12 are again in a horizontal position under the one fitted with suction cups 7 Car 6, which is again in position 6 ', come to rest again record a plate-shaped workpiece 4. Following this, it repeats itself the previously described workflow.

Should the device 1 for stacking plattenfoermiger Work pieces 4 are used (Fig. 6), so is the pivotable shaft 6 with their horizontally arranged fork arms under a plate-shaped workpiece 4, the is on the roller conveyor 10.

By lifting the shaft 16, the fork arms 12 pass through the between the rollers 10 formed free spaces, thus the plate 4 in a horizontal position to lift and to the device 6 provided with suckers which is in the position 6 'is to be lifted.

Here the plate 5 is grasped by the suction cups 7 and becomes a stack of plates 5 promoted.

Following this, the pivot shaft 16 again performs a pivoting movement by 900, thus bringing the fork arms 12 into a vertical position and a Downward movement, approximately to the level of the roller conveyor 10.

When the roller conveyor 10 is reached, the shaft 16 again pivots off to thus bring the fork arms 12 again in a horizontal position to a to lift another plate 4 and to feed the suction cups 7 of the carriage 6.

Claims (9)

Title: "Device for automatic stacking and destacking plate-shaped Work pieces'? Claims 1. Device for automatic stacking and destacking Plate-shaped workpieces, consisting of a machine frame, the parallel arranged roller tracks as well as a displacement device equipped with suction cups is assigned, characterized in that between the roller conveyor (2) for the Receipt of the plate stack (5) and each roller conveyor (10, 10 ') for transport the individual plate-shaped workpieces (4), one horizontal and longitudinal shaft (16) arranged parallel to the extension of the roller conveyors (2, 10, 10 ') is provided with arms (12) arranged at a distance from one another for formation a fork is equipped that this shaft (16) is pivotably mounted to said fork arms (12) from a horizontal position to a vertical position and vice versa and that the shaft (16) equipped with fork arms (12) displaceable (18,19), to carry out an up and down movement, on vertical Guides (19) is stored. 2. Device according to claim 1, characterized in that the pivot shaft (16) receiving the sliding pieces (18) with a chain (13), a Rope or a similar drive means are in connection. 3. Device according to claim 2, characterized in that the drive means (13) together with drive and deflection cranks (14, 15) inside a column (11) of the machine frame (1) are arranged. 4. Device according to claim 1, characterized in that the sliding pieces (18) receiving the pivot shaft (16) from a vertically arranged one Guide and slide rod (19) are included and that each slide rod (19) is connected to the associated column (11) of the machine frame (1). 5. Device according to claim 1, characterized in that each sliding piece (18) has a protruding bracket (22) for receiving a piston-cylinder unit (23, 24), the piston rod (24) of this drive unit (23, 24) being articulated with a lever arm (25) is in operative connection, which is firmly with the Pivot shaft (16) is connected. 6. Device according to claim 1-5, characterized in that on both sides of the roller conveyor (2) receiving the stack of panels (5), another Roller conveyor (10, 10 ') is arranged and that between each of these roller conveyors (10, 10 ') and the centrally arranged track (2) for receiving the plate stack (5), a swivel arm (16) equipped with fork arms (12) with its drive and control means (13, 23) is provided. 7. Device according to claim 1, characterized in that the conveyor rollers of the roller conveyor (10, 10 ') assigned to the fork arms (12) are inclined to the conveying direction of the plates (4) are arranged. 8. Device according to claim 1, characterized in that the fork arms (12), during the pivoting movement through the between the rollers (10) Pass through created free spaces. 9. Device according to claim 1, characterized in that the swivel arm (16) equipped with fork arms (12) has a swivel movement of approximately 900 carries out.