JPH0116219B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a workpiece unloading device that automatically loads and conveys workpieces processed by a transfer press, particularly a three-dimensional transfer press, onto a predetermined pallet.

2. Description of the Related Art Conventionally, methods shown in FIGS. 1 and 2 have been adopted as a method for processing a workpiece processed by a three-dimensional transfer press. Briefly, the workpiece W, which has been subjected to a predetermined press process in the transfer press machine TP, is supported by the fingers 2 of the transfer bar 1, which moves in three dimensions in conjunction with the ram of the transfer press TP, one pitch at a time. It is transported in the X direction. When the processed workpiece W reaches the P position, the workpiece W is transferred from the finger 2 to the conveyor 3,
The conveyor 3 transports the paper to the sorting table 4 . Finally, the workpieces W transferred onto the sorting table 4 are lined up by the worker M and loaded onto the pallet 6 on the cart 5.

In the case of such a conventional workpiece unloading device,
Even though the press machine itself is automated, the loading of processed workpieces still relies on the hands of workers, which limits the ability to save labor and improve productivity, and it is relatively tiring. The problem is that workers cannot be relieved from the strenuous work of transporting heavy objects.

This invention was made in view of the above points, and its purpose is to provide a workpiece unloading device that can automatically load processed workpieces without operator intervention. It is on offer.

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

First, the overall configuration of a transfer press line including the workpiece unloading device of the present invention will be explained based on FIG. 3. TP is a transfer press machine,
1 is a transfer bar of a transfer device that moves three-dimensionally in conjunction with the movement of the press ram 10; 11 is a material input device such as a sheet feeder provided at the front stage of the press machine TP; and 12 is a material input device installed at the rear stage of the press machine TP. This is the workpiece unloading device of the present invention, in which the workpiece W inputted from the material inputting device 11 is transferred to the press machine TP by the transfer bar 1.
After being subjected to a predetermined pressing process while being transported therein, the workpiece is transported to the workpiece transporting device 12.

4 and 5 show the workpiece unloading device 12.
13 is an alignment truck disposed below the transfer bar 1 having fingers 2, and this alignment truck 13 has a plurality of partition plates in order to align and stack the workpieces W in several rows. 1
4 and 14, and the transfer bar 1 is operated by a drive mechanism 15 mainly composed of a motor.
It runs between a work receiving position A and a transfer waiting position B on a rail 16 parallel to the workpiece.

Reference numeral 17 denotes workpiece pedestals arranged on both sides of the alignment cart 13, and this workpiece pedestal 17 is connected to a lifting mechanism 18.
The transfer bar 1 moves up and down by the operation of
While receiving the workpiece W from the transfer bar 1 by lowering it one pitch at a time in conjunction with the movement of the workpiece holder 17, the sixth
(see figure), when the loaded workpieces W reach a predetermined amount, the arrangement is such that the loaded workpieces W are transferred to the alignment truck 13 by descending below the loading surface of the alignment truck 13. be.

Further, reference numeral 19 denotes a workpiece retention mechanism disposed above the rear stage of the transfer bar 1, and this workpiece retention mechanism 19 is connected to a substantially L-shaped workpiece receiving arm 20
and a slider 22 equipped with a drive mechanism 21 for moving the work receiving arm 20 up and down,
Slider 22 including the workpiece receiving arm 20
It is equipped with a cylinder 23 and the like for sliding the entire device between the work receiving position A and the standby position _A1 . Then, as described later, the workpiece pedestal 17
Since the transfer bar 1 operates continuously even when the operator is transferring the work to the alignment cart 13, in such a case, the work receiving arm 20 is moved to the work receiving position A. Move forward and move the workpiece receiving arm 20 from the transfer bar 1 instead of the workpiece receiving stand 17.
The workpiece W is received on the upper part of the arm 20, and the workpiece W is thereby temporarily loaded and retained on the workpiece receiving arm 20.

24 is a conveyor disposed perpendicularly to the transfer bar 1; 25 is a transfer device that runs along a guide rail 27 on a frame 26; The transfer device 25 has a main body 29 equipped with a self-propelled mechanism and a lifting mechanism,
It is provided with an opening/closing mechanism 31 that moves up and down with respect to the main body 29 via a rod 30, and a claw body 32 that is opened/closed by the opening/closing mechanism 31. The transfer device 25 travels between the transfer standby position B and the transfer device C, receives the work W on the alignment cart 13 at the transfer standby position B, and pallets the work W at the transfer device C. It is designed to be transferred while remaining aligned at 28.

Next, the operation of the workpiece unloading device having the above configuration will be explained using FIG. 6 as well as FIGS. 4 and 5.

First, the transfer bar 1 having the fingers 2 moves as shown in FIG. 6 in conjunction with the movement of the press ram 10.
It performs three-dimensional movements as shown in _a1 to _a6 , receives the workpiece W at _a1 , advances it one step at a time, and releases the workpiece W at _a4 . Here, b ₁
Assuming that the workpiece receiving arm 20, which moves as shown in ~ _b4 , is moving forward to the workpiece receiving position A, the workpiece W released at _a4 as described above is transferred to the workpiece receiving arm 20, The work receiving arm 20 lowers one pitch each time it receives one work W, that is, while the transfer bar 1 is moving in the _a6 direction to receive the next work.

When the next workpiece W is similarly released at the _a4 position, this workpiece W is stacked on top of the previous workpiece, and thus the workpiece receiving arm 20 descends one pitch at a time to stack the workpieces W.

Next, when the number of stacked workpieces W on the workpiece receiving arm 20 reaches a predetermined amount, the workpiece receiving arm 20
When it reaches just before the lower limit position b ₃ , the workpieces W stacked on the workpiece receiving arm 20 are transferred to the workpiece holder 17 because the workpiece pedestal 17 is waiting at the upper limit position c ₁ at this time. The work receiving arm 20 once lowers to the lower limit position b ₃ and then retreats and rises to the standby position A ₁ via b ₄ and b ₁ and waits. Even after the workpiece W on the workpiece receiving arm 20 has been transferred to the workpiece receiving table 17, the transfer bar 1 continues to operate repeatedly, and is therefore released from the transfer bar 1 at _a4 . The workpieces W can now be directly stacked on the workpiece pedestal 17, and the workpiece pedestal 17, like the workpiece receiving arm 20, descends one pitch at a time each time a workpiece W is stacked, and the workpiece pedestal 17 descends one pitch at a time, and the workpiece pedestal 17 moves down one pitch at a time as the workpieces W are stacked one by one. New workpieces W are sequentially stacked on top of the workpieces W transferred from.

When the number of workpieces W stacked on the workpiece pedestal 17 in this manner reaches a predetermined set number, the workpiece pedestal 17 descends to the lower limit position _c2 , thereby receiving the stacked workpieces W in advance. Transfer to the alignment cart 13 waiting at position A. Here, even when the workpiece pedestal 17 is transferring the workpiece W to the alignment cart 13, the transfer bar 1 is still performing the three-dimensional movement described above. Simultaneously with the lowering of the pedestal 17, the workpiece receiving arm 20 advances again to the workpiece receiving position A, and instead of the workpiece pedestal 17, the workpiece receiving arm 20 receives and temporarily retains the workpiece W in the manner described above. Then, when the workpiece W is transferred from the workpiece pedestal 17 to the first space 13a on the alignment cart 13 defined by the partition plate 14, for example,
The alignment cart 13 is opened by a certain amount as shown in FIG.
d The workpiece holder 17 moves forward in _two directions, and then the workpiece pedestal 17 rises again to receive the workpiece W from the workpiece receiving arm 20, and thereafter the workpieces W are loaded in the same manner as described above.

On the other hand, by repeating the stacking of the workpieces W as described above, all the workpieces W are placed in the first, second, and third spaces 13a, 13b, and 13c on the alignment cart 13.
When the containers are stacked and become fully loaded, the sorting cart 13 travels all at once to the transfer standby position B and stops. At this time, the workpiece pedestal 17 remains at the lower limit position _c2 , so the workpiece receiving arm 20 advances again to the workpiece receiving position A and temporarily retains the workpiece W, as described above. When the alignment cart 13 reaches the transfer standby position B, the opening/closing mechanism 31 of the transfer device 25 waiting at that position descends, and the workpieces aligned and stacked on the alignment cart 13 are moved by the claws 32. While the workpieces are gripped and raised all at once, the empty alignment cart 13 returns to the initial position again, and with the return of the alignment cart 13, the workpiece pedestal 17 rises again to the upper limit position _C1. Repeat the previous action.

Subsequently, the transfer device 25, which has gripped the work W on the alignment cart 13 as described above, travels to the transfer device C where the pallet 28 is waiting.
At , the opening/closing mechanism 31 descends and opens the claw body 32, thereby transferring the works W to the pallet 28 while keeping them aligned and stacked. Then, when the workpiece W is transferred to the pallet 28, the transfer device 25 returns to the transfer standby position B, while the pallet 28 is carried out to the next process by the activation of the conveyor 24, and the next pallet is transferred in its place. It is carried into equipment C. Therefore, by repeating the above-described operations, the workpieces W can be loaded automatically without operator intervention.

As described above, according to the present invention, all the workpieces in the transfer press can be unloaded automatically, so there is no need for workers to be involved in the unloading of the workpieces, making the workpiece unloading work truly completely unmanned. In addition to greatly contributing to improvements in productivity and productivity, it also has the effect of freeing workers from the relatively physically tiring work of transporting heavy objects.

[Brief explanation of drawings]

FIG. 1 is a plan view schematically showing a conventional workpiece unloading device in a three-dimensional transfer press;
FIG. 2 is an explanatory side view of FIG. 1, FIG. 3 is an explanatory diagram showing the overall configuration of the workpiece unloading device according to the present invention,
4 is an enlarged view of the main part of FIG. 3, FIG. 5 is an explanatory plan view of FIG. 4, and FIG. 6 is an explanatory diagram for explaining the operating state of FIGS. 4 and 5. TP... Transfer press machine, A... Work receiving position, A ₁ ... Standby position, B... Transfer waiting position, C... Transfer position, W... Work, 1
... Transfer bar, 12 ... Workpiece unloading device, 13 ... Alignment cart, 17 ... Workpiece pedestal, 1
9... Work retention mechanism, 20... Work receiving arm, 24... Conveyor, 25... Transfer device, 28
...Palette.

Claims (1)

[Claims] 1 A device for aligning and loading processed workpieces carried out by a transfer bar of a transfer press onto a predetermined pallet via a workpiece pedestal, an alignment cart, and a transfer device, and arranged below the transfer bar. A sorting cart that runs between the work receiving position and a transfer standby position located later than the work receiving position and a transfer standby position subsequent to the transfer standby position and loaded with a predetermined pallet. a transfer device that travels between the transfer standby position and the transfer position and loads the workpieces aligned and stacked on the alignment cart onto a pallet; and the workpiece receiving position. A work holding mechanism mainly includes a work receiving arm that moves between a standby position and a work receiving arm that receives and stacks works from the transfer bar in conjunction with the movement of the transfer bar when the work receiving stand is in a state where it cannot receive the work. and, while receiving the workpieces from the workpiece retention mechanism at the workpiece receiving position, receiving and stacking the workpieces from the transfer bar in conjunction with the movement of the transfer bar, and aligning the stacked workpieces to the alignment cart. A workpiece unloading device for a transfer press, comprising a workpiece pedestal that can be moved up and down.