JPS60204519A - Workpiece feed level adjusting device - Google Patents

Abstract

PURPOSE:To make the feed of workpieces smooth in a workpiece feed level adjusting device when workpieces are fed between positions having different heights, by constituting the workpiece feed level adjusting device with a workpiece table elevating mechanism, a stopping and holding mechanism and a workpiece shifting mechanism. CONSTITUTION:Cylinders 19a, 19b are actuated to retract a stopper 18a, and a workpiece W is shifted from an unmanned carrier vehicle 41 onto a set table 12 after a stopper 18b is extended. Then the cylinder 19a is actuated to extend the stopper 18a to fix the workpiece W. Then a motor 23 and a hydraulic pump 22 are operated to move up a lifter 21 until the bottom section of the workpiece set table 12 comes up above an upper stopper 24. Then, a support column is rotated by a rotary actuator 32 to rotate the stopper 24 by an angle of 90deg., and then the supply of hydraulic pressure to the lifter 21 is stopped to allow the workpiece set table 12 to be lowered by its weight until it comes to be flush with a loading bed 51. Then the workpiece W is shifted. Thus, the shift of the workpiece may be made smooth.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is used when a workpiece (workpiece) is transferred from one position to another position having a different height. This invention relates to a work transfer height adjustment device.

[Technical background of the invention and its problems]

In FA (factory automation), FMS (flexible manufacturing systems), etc., a system is adopted in which workpieces are sequentially transported using automatic guided vehicles for NO machine tools, etc., which are arranged in large numbers.

The height of the workpiece mounting surface of an automatic guided vehicle is constant, but the table height of each machine tool is different, so conventionally the installation level of each machine tool was adjusted and all were placed at the same height. The layout was such that workpieces could be transferred easily. Therefore, it is necessary to adjust the installation level of each machine tool, and when replacing or relocating a machine tool, it is necessary to make major changes to the layout.

[Purpose of the invention]

The present invention has been made in consideration of these points,
It is an object of the present invention to provide a workpiece transfer height adjustment device that can smoothly transfer a workpiece to different height positions.

[Summary of the invention]

The workpiece transfer height adjustment device according to the present invention includes a workpiece mounting table on which a workpiece to be transferred is placed, a lifting mechanism that moves the workpiece mounting table up and down, and a stop holding mechanism that stops and holds the workpiece mounting table at a predetermined height. It consists of a mechanism and a workpiece transfer mechanism that is placed on a workpiece mounting table and transfers the hole workpiece to a predetermined position.

According to the present invention, the workpiece received on the workpiece mounting table is
The workpiece can be moved up and down to a predetermined height by the elevating mechanism, and while that height is held by the stop and hold mechanism, the workpiece transfer mechanism can be operated to transfer the workpiece to the next predetermined position.

By disposing the device according to the present invention between two positions having different heights, it is possible to smoothly transfer a workpiece between the two positions.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a work transfer height adjusting device according to the present invention. The work transfer height adjustment device [10 is disposed between a lower frame 11 forming the bottom of the device, a work mounting table 12 on which the work to be transferred is placed, and the lower frame 11 and the work mounting table 12. an elevating mechanism that moves the workpiece mounting table 12 up and down, and a workpiece mounting table 12
It consists of a stop and hold mechanism that stops and holds the workpiece at a predetermined height, and a workpiece transfer mechanism that transfers the workpiece placed on the workpiece mounting table 12 to a predetermined position.

The workpiece mounting table 12 has a substantially U-shaped cross section with an open upper side, and a plurality of workpiece transfer rollers 13 and guide rows 214 are disposed in the longitudinal direction on both upper ends. The work transfer row 213 is shown to be rotationally driven by the air motor 17 via the chain 15 and sprocket 16i. Further, on the extensions of both ends of the workpiece transfer roller row, there are stoppers 18a and 18, respectively.
b, and the stoppers 18a, 18b are moved up and down by cylinders 19a, 19b.

A lifter 21 that is moved up and down by hydraulic pressure is disposed on the lower surface side of the row loading table 12. The lifter 21 is moved up and down by a hydraulic pump 22 disposed on the lower frame 11 and a pump driving motor.

A stop holding mechanism is further provided between the lower frame 11 and the workpiece mounting table 12, and includes an upper stopper 25 and a lower stopper 25 for stopping and holding the workpiece mounting table 12 in the upper position and the lower position, respectively. There is. The upper stopper U and the lower stone/<25 are each attached and fixed to the same pillar 26 at a predetermined interval, and the lower end of the pillar 26 is rotatably supported by a thrust bearing 27. The upper stopper 25 is made of roots arranged in an oval shape, and the lower stopper 25 is made of two pieces arranged oppositely to hold the support 26.
It is attached by tightening and fixing the split member with a bolt 28. A sprocket 29 is fixedly mounted on the lower end of the support column, and by rotating this sprocket 29 with a chain 31't'' and an L-tlow clear actuator 32, the support U can be rotationally driven.

An oblong hole 33 into which the upper stopper can be inserted is bored at the bottom of the workpiece mounting table 12.

The oval-shaped hole 33 is longer than the maximum length of the upper stopper.
The lower stopper 25 also has a smaller width than the lower stopper 25 .

Next, the operation of this embodiment having such a configuration will be explained with reference to FIGS. 2 to 4.

FIG. 2 shows the workpiece mounting between an automatic guided vehicle 41 that transports the workpiece W and a mounting table 51 to which the workpiece W is supplied (for example, a table of a machine tool or a supply table that supplies the workpiece to the table of a machine tool). Figure b shows a state in which the heights of the mounting surfaces have a difference of Hl.

First, the workpiece W that has been transported by the automatic guided vehicle 41 is
The workpiece is transferred to the workpiece transfer height adjustment device 11i10, but in this case, the workpiece transfer height adjustment device 10 is
2 descends and is stopped and held by the lower stopper in the next state.

Operate cylinders 19a and 19kl to stop the cylinder (18a
is retracted and the stopper 18b4 is brought into the protruding state, and then the workpiece W is transferred from the automatic guided vehicle 41 side to the workpiece mounting table 12 side. This transfer work is performed, for example, by a transfer device provided on the automatic guided vehicle 41.

When the workpiece W is transferred and placed on the workpiece mounting table 12, the cylinder 19a is activated and the stopper 18m protrudes, thereby preventing the workpiece W from falling. Subsequently, by operating the motor 23 and the hydraulic pump 22, the lid 21 is raised to the hydraulic pressure. The lifter 21 is raised until the bottom of the workpiece mounting table 12 reaches a height Hl higher than the upper stopper 24. This rising operation is controlled, for example, by a limit switch 52 provided on the mounting 851. In this raised position, the mounting surface of the workpiece mounting table 12 is raised by the height of the mounting table 51 machining H3 (see FIG. 8). During this upward movement of the workpiece mounting table 12, the upper stopper and the oblong hole 33 provided at the bottom of the workpiece mounting table 12 have their longitudinal directions facing in the same direction, and the upper stopper moves smoothly. It can be inserted and removed through the oval hole 33.

Next, the rotary actuator 32 is actuated to
is rotated to rotate the upper stopper 24 by 90°. Subsequently, when the supply of pressure oil to the lifter 21 is stopped, the workpiece mounting table 12 descends due to its own weight, and the bottom portion abuts the upper stopper U, so that the workpiece mounting table 12 is stopped and held. In this case, since the longitudinal axes of the upper stopper 24 and the oval hole 33 are perpendicular to each other, it is impossible for the upper stopper U to enter the oval hole 33 (for example, when the workpiece mounting table 12 is stopped). The holding motion is maintained.

As a result, the workpiece mounting table 12 and the mounting table 51 are at the same level, and the work W is smoothly transferred to the mounting table 51 side by the operation of the air motor 17 and the workpiece transfer roller 13 (see FIG. 4). Incidentally, when transferring the workpiece W, the stopper 18b is kept retracted from the cylinder 19b by 4. After transferring the workpiece W, the lifter 21 is raised again. Move the workpiece mounting table 12 from the upper stopper to H.
Rotate the support column 26 by 90 degrees while lifting it to a height of 3 degrees. Subsequently, when the pressure oil supply to the lifter 21 is stopped, the upper stopper 24- of the workpiece mounting table 12 is moved to the oblong hole 3.
3, it descends and comes into contact with the lower stopper, where it is stopped and held. Since the workpiece mounting table 12 is stopped and held by the lower stopper section, the level of the workpiece mounting table 12 is at the same level as the automatic guided vehicle 41, and the subsequent carrying-in operation of the workpiece W is made possible. Such a series of operations of the work transfer height adjustment device 10 can be performed using a normal sequence control technique.

Further, the operation of transferring the workpiece W from the mounting table 51 to the automatic guided vehicle 41 can be performed by the reverse operation to that described above.

The first and eighth positions of the workpiece mounting table 12 determined separately for the upper stopper and the lower stopper 5 can be changed by changing the mounting positions of the upper stopper part and the lower stopper part to the pillars 26. Easily adjustable.

In other words, the height of the upper stopper can be adjusted by setting the support 26 as a screw-fixed double tube with a nesting hole, and adjusting the amount of screwing of the support part on the side where the upper stopper is fixed to the other part. This can be done by changing the lower stopper 25.
The height of the lower stopper 25 is determined by loosening the pole 28.
The mounting position can be adjusted by moving the mounting position to 6.

In addition, even if the heights of the two mounting surfaces on which the workpieces are transferred change, they can be easily adjusted.

Note that the workpiece W is normally transferred using a pallet.

According to this embodiment, even if there is a difference in height between the automatic guided vehicle 41 and the mounting table 51, the workpiece transfer height adjustment device 10 can be installed between them. By doing so, the entire transfer of the workpiece W can be carried out smoothly.

Therefore, there is no need to adjust the level of the mounting table 51 according to the level of one automatic guided vehicle 41 as in the conventional case, and the layout of machine tools etc. is easy.

#! FIG. 6 is a plan view showing a layout when the work transfer height 1llllI device IO according to the present invention is applied to a factory in which an NO machine tool 64 is installed. The workpiece transfer height adjustment device 10 is disposed between the automatic guided vehicle 41 and the automatic pallet changer 51, and allows smooth transfer of the work W even when the levels of the automatic guided vehicle 41 and automatic pallet changer 51 are different. It can be carried out. In addition, No. machine tool 54, automatic pallet changer 51
There is no need to adjust the level according to the automatic guided vehicle 41,
The installation work becomes easier. Incidentally, reference numeral 53 is a transfer/detachment device which is disposed between the No. machine tool 54 and the automatic pallet changer 51, and performs the transfer work of workpieces between the two.

FIG. 6 shows a work transfer height adjusting device 10 according to the present invention.
Numerous conveyor lines 761a, 61b, 61c
FIG. 2 is a plan view illustrating an example of the arrangement in a factory. Thus conveyor lines 61&, 61b.

A work transfer height adjustment device 10 is installed at each end of 61c.
By disposing a
Even if the levels of a, 61b, and 610 are Jl, no special level adjustment is required.

〔Effect of the invention〕

As explained above, according to the present invention, two
By disposing the workpiece between the two mounting surfaces, the workpiece can be transferred smoothly without having to adjust these mounting surfaces to the same level in advance. This eliminates the need for individual level adjustments of machine tools, such as floor work, in unmanned factories that use automated guided vehicles to transport workpieces to multiple machine tools. Layout can be done easily. In addition, by applying the present invention to existing machine tools, it is possible to easily make an existing factory unmanned. Furthermore, since the workpiece mounting table is stopped and held by the upper and lower stoppers, the holding level is stable and heavy objects can be transferred.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the work transfer height 1lAI adjustment device according to the present invention, FIGS. 2 to 4 are explanatory diagrams showing the operation of the embodiment shown in FIG. 1, and FIGS. Fig. 6 is a plan view showing an example in which the present invention is applied, Fig. 5 shows an example in which it is arranged in a machine tool equipped with an automatic pallet changer, and Fig. 6 shows an example in which it is arranged in relation to a plurality of belt conveyors. ing. 12... Workpiece mounting table, 21... Lifter, Sae...
Upper stopper, δ...lower stopper, ah...post, 33
...Oval hole, 41...Automated guided vehicle, 51...
Mounting table, W...work. Applicant's agent Kiyomi Inomata／・Figure／／） Figure 2 Figure 5 Hole 6 Figure

Claims (1)

[Claims] 1. A workpiece mounting table on which a workpiece to be transferred is placed, an elevating mechanism that moves the workpiece table up and down, and a stop-holding mechanism that stops and holds the workpiece table at a predetermined height. and,
A workpiece transfer height adjustment device comprising: a workpiece transfer mechanism that transfers the workpiece placed on the workpiece mounting table to a predetermined position. 2. The workpiece transfer height as set forth in claim 1, wherein the stop and hold mechanism includes an upper stopper and a lower stopper for stopping and holding the workpiece in the upper and lower positions, respectively. Adjustment device. 8. A patent claim characterized in that the upper stopper has an oval shape and is rotatable by 90'', and the bottom of the workpiece mounting table is provided with an oval hole through which the upper stopper can be inserted. The workpiece transfer height adjusting device according to item 2.