JPH05306003A - Pallet stocker - Google Patents

Abstract

PURPOSE:To carry in and out pallets at the same time by disposing a means which transports a pallet on lifting part side to pallet setting part side, and a means which is disposed in a different route from this means and transports a pallet on the pallet setting part side to the lifting part side. CONSTITUTION:For carrying plate materials W to be machined in a punch press machine 1, a pallet P where a desired plate material W to be machined stored in a device body 11 is placed is carried out by a stocker 10. In other words, an elevator 12 is lifted to locate the elevator 12 at a shelf position where a desired pallet P is stored. Next, a horizontal transfer device 25 is driven to run an endless chain 23 and transfer the pallet P to the elevator 12. Then the elevator 12 is lowered to locate it at a flush position to a pallet setting part 20 and transfer the pallet P onto a conveyer 40 and the pallet setting part 20. As a result, the plate material W to be machined on the pallet P is carried in the work table 2 of a punch press machine 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a pallet stocker,
In particular, the present invention relates to a pallet stocker for loading and unloading a pallet on which a processing plate material to be supplied to a plate material processing machine is placed.

[0002]

2. Description of the Related Art In a plate material processing line including a plate material processing machine such as a punch press machine, a stocker may be provided for supplying a plate material for processing to the plate material processing machine. This stocker is generally an apparatus main body having a plurality of shelves for accommodating pallets on which plate materials for processing are placed,
An elevator device that can be lifted up and down on the device body for loading and unloading pallets, and an elevator device that is provided on the opposite side of the elevator device with the device body sandwiched between, for placing the pallet taken out from the device body by the elevator device. It is provided with a table and a horizontal transfer device provided in the elevator device for transferring the pallet in the horizontal direction.

When the pallet is unloaded, the elevator device is moved to a shelf position for accommodating the pallet on which a desired plate is placed. Then, the pallet in the shelf is transferred to the elevator device side by the horizontal transfer device. Next, the elevator apparatus is driven so that the elevator apparatus faces the table. From this state, the horizontal transfer device is driven to transfer the pallet on the elevator device onto the table via the horizontal transfer device. In this way, the shipping process is completed. From this state, the plate material carrying-in device such as a loader carries the plate material on the table into the plate material processing machine.

When the pallet is stored, the pallet on which the remaining plate materials on the table are placed is transferred to the elevator device side by the horizontal transfer device. Next, the elevator device is moved up and down to move the elevator device to the empty shelf position of the device body. Then, the pallet on the elevator apparatus is stored in the apparatus main body by the horizontal transfer apparatus.

[0005]

In the conventional stocker, as described above, the pallet transfer between the elevator device and the table when the pallet is loaded and unloaded is carried out by the horizontal transfer device. For this reason, the unloading process cannot be performed when the pallet is loaded by the horizontal transfer device, which causes a problem that the loading and unloading time is long.

An object of the present invention is to provide a pallet stocker capable of shortening the loading / unloading time.

[0007]

A pallet stocker according to the present invention is a device for loading and unloading a pallet on which a processing plate material to be supplied to a plate material processing machine is placed. This apparatus includes a storage section, a lifting section, a pallet mounting section, and first and second transfer means. The accommodation section has a plurality of shelves and accommodates the pallet.
The elevating part is provided in the accommodating part so as to be able to ascend and descend, and is used for loading and unloading pallets for each of the shelves. The pallet mounting part is for mounting the pallet taken out from the storage part by the elevating part. The first transporting means is a means for transporting the pallet on the elevating section side to the pallet mounting section side, which is arranged in the accommodation section. The second carrying means is arranged on a path different from that of the first carrying means, and is means for carrying the pallet on the pallet mounting section side to the elevating section side.

[0008]

In the pallet stocker according to the present invention, when the pallet is unloaded, the elevating section is moved up and down, and the elevating section is arranged at the shelf position where the desired plate material is stored. Then, the pallet in the shelf is unloaded and moved to the elevating unit side. Next, the first transfer means in the storage section transfers the pallet on the elevating section side to the pallet mounting section side and places the pallet on the pallet mounting section. Then, the plate material for processing on the pallet mounting portion is supplied to the plate material processing machine.

When the pallet is stored, the pallet on the pallet placing section is conveyed to the elevating section side by the second conveying means through a route different from that of the first conveying means. Then, the elevating part is moved up and down, and the pallet on the elevating part side is stored in the shelf. On the other hand, when the pallet is conveyed between the pallet placing part and the elevating part by the second conveying means at the time of pallet loading, the pallet on which the plate material to be supplied next to the plate material processing machine is placed is discharged by the elevating part Then, it is delivered to the first transport means. Thereby, the warehousing process of carrying the pallet on the side of the first carrying means to the pallet placing section can be performed in parallel during pallet warehousing, and thus the warehousing time can be shortened.

[0010]

FIG. 1 shows a plate material processing line to which an embodiment of the present invention is applied. A punch press machine 1 as a plate material processing machine is arranged at one end of the plate material processing line. The punch press machine 1 is a processing machine for making a hole in the plate material W placed on the work table 2, and has a work holder 3 for gripping the plate material W. The work holder 3 is provided so as to be movable in the left-right direction inside a carriage 4 provided on the front end side of the work table 2. The carriage 4 is provided so as to be movable in the front-rear direction (vertical direction in FIG. 1).

A stocker 10 is arranged beside the punch press 1. The stocker 10 is the device body 1
1, an elevator 12 that can be lifted and lowered in the apparatus body 11, and a pallet mounting portion 20 that is provided on the opposite side of the apparatus body 11 from the elevator 12. As shown in FIGS. 2 and 3, the apparatus main body 11 has a plurality of shelves for accommodating the pallets P on which the plate materials W are placed. Each shelf is composed of left and right arm brackets 13, respectively.

The elevator 12 is used for loading and unloading the pallets P for each shelf. Elevator 12
Has a pair of left and right elevating frames 21. Each elevating frame 21 has a connecting member 22 disposed between them.
Are linked by. Further, an endless chain 23 is arranged on each lifting frame 21. Each of these endless chains 23 is attached with a pallet support piece 24 that projects inward in a cantilever manner. The endless chain 23 and the pallet support piece 24 constitute a horizontal transfer device 25 for transferring the pallet P carried on the elevator 12 in the horizontal direction (vertical direction in FIG. 1).

A motor 30 for raising and lowering the elevator 12 is mounted on the upper frame 6 (FIG. 2) of the apparatus main body 11.
Is provided. The motor 30 is arranged at an intermediate position in the left-right direction of the upper frame 6. A bevel gear 31 is attached to the rotary shaft end of the motor 30. On the other hand, a shaft 32 extending in the left-right direction is arranged on the upper frame 6. The shaft 32 is rotatably supported on the upper frame 6. A bevel gear 33 that meshes with the bevel gear 30 is attached to an axially intermediate position of the shaft 32. Further, sprockets 34 and 35 are attached to both ends of the shaft 32. Left and right vertical frames 7 that support the upper frame 6,
A sprocket 36 corresponding to each of the sprockets 34 and 35 is rotatably provided at the lower portion of the eight. Chains 37 are wound around the sprockets 34 and 36 and between the sprockets 35 and 36, respectively. Part of each lifting frame 23 of the elevator 12 is fixed to the chain 37. With this configuration, the elevator 12 is moved up and down by driving the motor 30.

The pallet mounting portion 20 is composed of a member fixed to the apparatus main body 11 and having a U-shape in plan view. The mounting height position of the pallet mounting portion 20 is the elevator 1
It is almost the same as the position when 2 is moved to the lowermost position. A conveyor 40 is provided below the lowermost shelf in the apparatus main body 11. This conveyor 40
Is for transporting the pallet P on the elevator 12 that has moved to the lowermost position to the pallet mounting portion 20 side. The conveyor 40 includes a pair of left and right sprockets 41, 42 and a chain 4 wound between them.
3 and a motor (not shown) for driving the sprockets 41 or 42.

On the other hand, the stocker 10 is arranged in a recess 45 formed in the working yard, as shown in FIGS. The device body 11 is supported by the leg frame 46 in the recess 45. A truck 50 with a lifter is provided in the recess 45. The lifter-equipped carriage 50 is for transporting the pallet on the pallet mounting shelf 20 onto the pallet support piece 24 of the elevator 12, and is movable in the recess 45 in the left-right direction in FIG. The lifter-equipped trolley 50 has a table 51 on which the pallet P is placed. The table 51 can be moved up and down by an elevating mechanism including a link mechanism 52 and a cylinder 53.

Although not shown, rails are horizontally installed above the punch press machine 1 and the stocker 10, and a loader as a plate material loading device is movably provided on the rails. Next, the operation will be described. When carrying the processing plate W into the punch press machine 1, the stocker 10 unloads the pallet P on which the desired processing plate W stored in the apparatus body 11 is placed. In this case, first, the elevator 12 is moved up and down, and the elevator 12 is arranged at the shelf position in which the desired plate material W is housed (see the alternate long and short dash line in FIG. 3). When the elevator 12 is moved up and down, the bevel gear 3 is driven by the drive of the motor 30.
The chain 37 is run through the shafts 0, 33, the shaft 32, and the sprockets 34, 35. This allows the chain 3
The elevator 12 partially fixed to 7 moves up and down. When the elevator 12 moves to the desired shelf position, the motor 3
Stop 0. Next, the horizontal transfer device 25 is driven to drive the endless chain 23 to take out the pallet P on which the desired plate material W is loaded from the bracket 13 and move it onto the elevating frame 21 of the elevator 12.

Next, the motor 12 is driven to move the elevator 12 to the lowermost position (solid line position in FIG. 3). At this time, the elevator 12 is placed at substantially the same height as the pallet rest 20. Next, the horizontal transfer device 25 and the conveyor 40 are driven to move the processing plate W on the elevator 12 together with the pallet P onto the conveyor 40. Next, when the pallet P is not placed on the pallet placing section 20, the conveyor 40 is driven to move the pallet P on the conveyor 40 onto the pallet placing section 20. The presence / absence of a pallet on the pallet mounting portion 20 is controlled by a detection switch (not shown). In this way, the shipping process of the pallet P is completed.

From the state in which the pallet P is placed on the pallet placing section 20, the plate material W on the pallet P is carried onto the work table 2 of the punch press machine 1 by driving a loader (not shown). In the punch press machine 1, the plate material W placed on the work table 2 is held by the work holder 3, and the plate material W is subjected to a predetermined processing while moving the work holder 3 and the carriage 4 in the left-right direction and the front-back direction, respectively. Done. Here, in the case of performing processing on a plurality of plate materials on the pallet mounting unit 20, the loader is appropriately driven to sequentially carry the plate materials into the punch press machine 1 and the processing process is continuously performed.

Next, the pallet P on the pallet rest 20 is shown.
When the truck is loaded, from the state in which the lifter-equipped carriage 50 is placed below the pallet placement portion 20 (see the solid line in FIG. 3),
The table 51 is lifted to move the table 51 into the opening 20a of the pallet mounting portion 20. As a result, the pallet P placed on the pallet rest 20 is transferred to the table 51 of the lifter-equipped carriage 50.
From this state, the trolley with lifter 50 is run, and FIG.
To the right end position (the position indicated by the alternate long and short dash line) and the table 51 is lowered. Next, the trolley with lifter 50
Is moved to the left end position in FIG. 3 and the table 51 is raised (see the alternate long and short dash line).

When there is a plate material to be processed next on the punch press machine 1 side and another pallet P needs to be delivered when the pallet is conveyed by the lifter-equipped carriage 50, the above-mentioned delivery processing is performed. Similarly, the pallet P on which the plate material W to be processed next is placed is placed on the elevator 12 by driving the elevator 12. Then, the elevator 12 is moved to the lowermost position, and the elevator 1
2 and the conveyor 40 are driven to move the pallet P on the elevator 12 side onto the conveyor 40. In this state, the warehousing operation is put in the sheltered state. Then, when the pallet unloading cart 50 is carried out from the pallet placing section 20, the conveyor 40 is driven again, and the pallet P on the conveyor 40 is conveyed onto the pallet placing section 20.

On the other hand, the lifter-equipped carriage 50 moved to the left end position in FIG. 3 is moved to the elevator 12 side to dispose the lifter-equipped carriage 50 in the elevator 12. From this state, the table 51 of the lifter-equipped carriage 50 is lowered (see the alternate long and short dash line in FIG. 3). As a result, the pallet P on the table 51 is placed on the elevating frame 21 of the elevator 12. Next, the elevator 12 is driven to move the elevator 12 to the empty shelf position, and the pallet P on the elevator 12 is loaded into the apparatus main body 11. In this way, the pallet receiving process is completed.

In this case, the conveyor 40 for transporting the pallet P from the elevator 12 side to the pallet placing section 20 side in the apparatus main body 11 and the pallet placing section 20 side to the elevator 12 side below the apparatus main body. Since the lifter-equipped carriage 50 for transporting the pallet P is provided, the pallet P loading / unloading process can be performed in parallel, and the loading / unloading time can be shortened. Particularly, when the pallets P are frequently loaded and unloaded, for example, in the case of high-mix low-volume production, the time can be significantly shortened. [Other Embodiments] In the above embodiment, the truck 50 with lifter is used.
Although the pallet transfer unit 20 and the elevator 12 are transferred and the pallet is conveyed between the pallet 20 and the elevator 12, the application of the present invention is not limited to this. For example, a transfer device for transferring pallets between the pallet mounting section 20 and the elevator 12 may be provided separately from the carriage for transferring the pallet between the pallet mounting shelf 20 and the elevator 12. ..

[0023]

In the pallet stocker according to the present invention,
The first to convey the pallet on the lifting section side to the pallet mounting section side
Since the carrying means and the second carrying means arranged on a different route from the first carrying means and carrying the pallet on the pallet loading section side to the elevating section side are provided, the pallet loading / unloading processing should be performed in parallel. It is possible to shorten the entry and exit time.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a plate material processing line to which an embodiment of the present invention is applied.

FIG. 2 is a schematic front view of the embodiment.

FIG. 3 is a schematic side view of the embodiment.

[Explanation of symbols]

 1 Punch Press Machine 10 Stocker 11 Machine Main Body 12 Elevator 20 Pallet Loading Section 40 Conveyor 50 Truck with Lifter

Claims (1)

[Claims] 1. A pallet accommodating section having a plurality of shelves; an elevating section for loading and unloading pallets to and from each of the shelves; a pallet mounting section for mounting a pallet taken out from the accommodating section; First conveying means arranged in the accommodating portion for conveying the pallet on the elevating part side to the placing part side; and a pallet on the placing part side arranged on a different route from the first conveying means. A pallet stocker provided with a second carrying means for carrying to the side.