JPH0929572A - Device for adjusting position of jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically adjust the position of a jig upon a stop of a conveyer, by turning an eccentric cam so as to depress a lock plate through the intermediary of a lock pin so as to freely move the jig following the movement of an elevating rod along a rail. SOLUTION: A lower lever 20 of a C-like shape lever 21 crossing through a square hole 6 is depressed downward by lowering an elevating rod 30. An eccentric cam 18 is rotated by depressing the C-like shape lever 21, and a lock plate 15 is depressed through the intermediary of a ball 13, and the clamping and fixing of the rail 25 and a jig 1 is released so that the jig 1 freely slidable along the rail 25. In this condition, a servo-motor in a movable mechanism is driven so that the elevating rod 230 is moved to a predetermined position through the intermediary of a mover, and the jig 1 is moved to a predetermined position corresponding to a next workpiece.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention holds a work (workpiece) at a predetermined position by a jig on a pallet fixed on a conveyor, and when performing work while sequentially moving the work, The present invention relates to a jig position adjusting device in which a jig on a pallet being held can be easily moved according to the size of a work.

[0002]

2. Description of the Related Art Conventionally, on the upper surface of a pallet for holding a work, for example, a plurality of rails are arranged in an orthogonal direction, and a jig (a guide member for stably holding the work at a predetermined position) is provided on the rail. Was slidable and could be fixed at any position with bolts.

Therefore, when the position of the jig is moved when the size of the work is changed, the jig fixing bolt is loosened to move the jig to a predetermined position, and the bolt is tightened again at that position. It was done in a jig.

[0004]

In the above-mentioned conventional jig, one jig is usually provided with at least two bolts, and one pallet has 4 to 8 bolts. Since the tools are arranged and the conveyor is equipped with dozens of pallets, it takes a long time to move all the jigs on these pallets to the positions suitable for the new size work. I had to stop the conveyor.

In particular, in recent years when the streamlining of work has been called for,
It is not permissible to stop the conveyor during working hours, and the movement of jigs on the pallet must be carried out on factory holidays.

Further, a strong force is required for loosening or tightening a bolt by hand, and particularly when tightening a jig at a predetermined position, one hand is used to prevent the jig from being displaced during tightening the bolt. It was necessary to firmly tighten the bolt with the other hand while firmly supporting the tool, and this work required skill.

[0007]

SUMMARY OF THE INVENTION The present invention has solved the above-mentioned conventional problems and uses a strong spring to fix a jig to a rail without using a bolt. And the release of the fixation by the spring is performed via the cam by the lowering of the elevating rod, and
It is characterized in that the jig can be moved to a predetermined position by the horizontal movement of the elevating rod when descending, and the jig can be automatically fixed to the rail by elevating the elevating rod.

That is, according to the present invention, a jig 1 having a C-shaped channel rail 25 fixed to the upper surface of the pallet P with its opening edge portion 26 facing upward and having the work guide 2 on the outer side thereof.
Is arranged slidably along the upper surface of the rail 25, and the compression coil spring 12 is interposed between the flange 11 of the lock pin 10 having the flange 11 at the upper end and the bottom wall 4 of the jig 1. The lock plate 1 has a lower end portion of the lock pin 10 penetrating the lower wall 4 of the jig 1 so as to be vertically movable, and the lower end portion is slidably provided inside the rail 25.
5 and fixed above the lock pin 10 in the jig 1,
An eccentric cam 18 that comes in contact with and separates from the upper end of the lock pin 10 about a horizontal pin 22 is rotatably arranged, and a C-shaped lever 21 is provided on the eccentric cam 18 so as to project obliquely upward. The eccentric cam 18 is rotated via the C-shaped lever 21 by lowering the elevating rod 30 arranged above the rail, and the rail 25 is sandwiched between the rail 25 and the bottom wall 4 of the jig 1 by the action of the compression coil spring 12. The lock plate 15 which has been fixed by pressure is pushed down through the lock pin 10 to move the lifting rod 3
The jig 1 is free to move following the movement along the rail 25 of 0, and the jig 1 can be fixed to the rail 25 by the pressure of the compression coil spring 12 by the elevation of the elevating rod 30. Position adjusting device.

In the jig position adjusting apparatus according to the present invention, when the lifting rod 30 is lowered in the fixed state of the jig 1 shown in FIG. 1, the eccentric cam 1 is moved through the C-shaped lever 21.
8 rotates to the right, resisting the pressure of the spring 12 and locking pin 10
By pushing down as shown in FIG.
The lock plate 15 in the rail 25, which is fixed to the lower end of the, also moves down a little.

As a result, the clamping pressure between the jig 1 and the rail 25 is released. Therefore, when the elevating rod 30 is moved along the rail 25 to the target position, the jig 1 easily follows.

Next, at the predetermined position, the lifting rod 30
When the lever is raised, the eccentric cam 18 reversely rotates counterclockwise via the C-shaped lever 21 to release the pressing of the lock pin 10 by the eccentric cam 18 as shown in FIG. The plate 15 moves up to the bottom wall 4 of the jig 1.
The rail 25 is pinched between and, and the jig 1 is automatically fixed to the rail 25 by the action of the spring 12.

[0012]

1 is a vertical sectional side view of a jig position adjusting apparatus according to the present invention. The jig 1 is a work guide 2 corresponding to the shape of a work W held on a synthetic resin pallet P. As shown in FIG. A box-shaped one made of synthetic resin or metal with an outer part, and a vertical round hole 3 is formed in the upper part in the central part as shown in FIGS. A hole 5 is provided, a vertical rectangular hole 6 is also provided on the side of the round hole 3, and the square hole 6 and the round hole 3 are communicated with each other by a slit 7. On the opening edge 2 of the rail 25
6 has a guide protrusion 8 slidably fitted therein.
In addition, 9 is a spring guide provided upright in the lower part of the slit 7.

Reference numeral 10 is a lock pin having a flange 11 at the upper end thereof, and a strong compression coil spring 12 is interposed between the flange 11 and the bottom wall 4 of the jig 1, and the lower end thereof is provided with the pin hole. 5 and is fixed to a lock plate 15 slidably provided inside a rail 25. In addition, 1
Reference numeral 3 denotes a ball rotatably provided at the center of the upper end of the lock pin 10 for smoothly rotating the eccentric cam.

As shown in FIG. 2, the lock plate 15 has a convex portion 16 on the upper surface thereof which is slidably fitted in the opening edge portion 26 of the rail 25.
And has a thickness slightly smaller than the height of the inside of the rail 25, and is normally operated by the compression coil spring 12 as shown in FIG. The rail 25 is clamped and fixed at 4.

Reference numeral 18 denotes a plate-shaped eccentric cam provided above the lock pin 10, and a C-shaped lever 21 composed of an upper lever 19 and a lower lever 20 so as to project obliquely upward.
Is integrally provided, and the horizontal pin 22 is used as a fulcrum for about 45
° It is designed to rotate.

In the state of FIG. 1, that is, in the state where the upper lever 19 of the C-shaped lever 21 does not face the square hole 6, the eccentric cam 18 has the center of the horizontal pin 22 and the lower end (a) of the eccentric cam 18. The dimension between them is shorter than the dimension between the center of the horizontal pin 22 and the upper surface of the ball 13, the eccentric cam 18 and the upper surface of the ball 13 are not in contact, and the compression coil spring 12 is the flange 11 of the lock pin 10. The lock plate 15 in the rail 25 is pulled upward to fix the jig 1 to the rail 25.

On the other hand, in the lower right of the eccentric cam 18 (b).
At the point, the dimension between the center of the horizontal pin 22 and this point (b) is larger than the dimension between the center of the horizontal pin 22 and the upper surface of the ball 13, and the C-shaped lever 2 of the eccentric cam 18 is provided.
When 1 descends downward as shown by the chain double-dashed line in FIG. 1, the upper end of the ball 13 is pushed down at the point (b), and the lock plate 15 moves the lock plate 15 through the rail 2 through the lock pin 10.
As shown in FIG. 2, the jig 1 is separated from the lower surface of the opening edge portion 26 of the rail 25, and the jig 1 is unlocked so that the jig 1 can freely slide on the rail 25.

A C-shaped lever 21 provided so as to project obliquely above the eccentric cam 18 forms an obliquely upward C-shape by an upper lever 19 and a lower lever 20. 1 is directed diagonally upward as shown in FIG. 1, the upper lever 19 does not face the square hole 6, and only the lower lever 20 is located at the side of the horizontal pin 22.
Overhangs across.

Reference numeral 30 denotes an elevating rod which can be inserted into and removed from the square hole 6 of the jig 1. As shown in FIGS. 1 and 2, the tip and three rollers 31, 32 and 33 arranged at the upper part of the rod are two. The plate-shaped rod 34 is rotatably clamped from both sides.

Of the above three rollers, the roller 3 at the tip portion
An outer diameter 1 is narrower than the width of the plate-like rod 34, and the outer circumference of the plate-like rod 34 is provided at the lower end and the right side so as to project slightly from the plate-like rod 34. The rollers 31 and 32 are provided so as to project slightly to the left of the plate-shaped rod 34, and the distance between the rollers 31 and 32 is set so as to be within the C-type lever 21 as shown by the chain double-dashed line in FIG. . The uppermost roller 33 is the plate-like rod 3.
The outer diameter is slightly larger than the width of No. 4 and is provided at a position to be accommodated in the square hole 6 of the jig 1 when the elevating rod 30 descends as shown by the chain double-dashed line in FIG.

The elevating rod 30 is fixed to the lower end of a rod 40 which can be raised and lowered in the jig moving mechanism 35 shown in FIGS. That is, in the moving mechanism 35, the rod 40 can move up and down in the cylinder 39 vertically provided on the side of the moving body 38 that horizontally moves through the screw shaft 37 that is horizontally arranged by the rotation of the servo motor 36. It is provided, and the movement of each part is driven by computer control.

As shown in FIG. 4, the moving mechanism 35 is provided on the lower surface of the frame 41 arranged above the pallet P across the conveyor C in association with each jig 1 on the pallet P and moves. The center of the rod 40 of the mechanism 35 and the center of the square hole 6 of the jig 1 are aligned with each other.

The method for adjusting the position of the jig is as follows. When the conveyor C is stopped and the work W held by the jig 1 on the pallet P is being worked, as shown in FIG.
One pallet P1 is placed across the conveyor C and is positioned below the frame 41 having a plurality of moving mechanisms 35 on the lower surface.

When the rod 40 of the moving mechanism 35 is hydraulically lowered at the stop position of the conveyor C, the elevating rod 30 fixed to the lower end of the rod 40 is lowered, as shown in FIG.
It is inserted into the square hole 6 of the jig 1 as described above.

By lowering the lifting rod 30, the lower lever 20 of the C-shaped lever 21 which traverses the inside of the rectangular hole 6 is pushed down as shown by the chain double-dashed line in FIG. By pushing down the C-shaped lever 21, the eccentric cam 18 supported by the horizontal pin 22 rotates about 45 °, and as shown in FIG.
The upper surface of 3 is slightly pushed down at the point (b) of the eccentric cam 18, and the lock plate 15 is also pushed down by this pushing down, so that the clamping pressure between the rail 25 and the jig 1 is released, and the jig 1 is moved to the rail. It becomes a state where it can freely slide along 25.

In this state, the servomotor 36 of the moving mechanism 35 is driven and the lifting rod 3 is moved through the moving body 38.
When 0 is moved to a predetermined position, the jig 1 moves the lifting rod 30
And moves on the rail 25 following the movement of.

After the jig 1 is moved to a predetermined position corresponding to the next work W, the lifting rod 30 is hydraulically pulled up on the spot, and the intermediate roller 32 causes the C-shaped lever 21 to move.
Push up the upper lever 19 of the eccentric cam 18 about 45 °
The ball 13 is rotated to the left, and the pushing down of the ball 13 by the point (b) is released.

As a result, the compression coil spring 12 pushes the lower surface of the flange 11 upward, and the lock plate 15 at the lower end of the compression coil spring 12 is also pulled up with a strong force via the lock pin 10, so that the bottom of the jig 1 as shown in FIG. The rail 25 is clamped between the wall 4 and the lock plate 15, and the jig 1 is moved to the rail 2
Fix to 5.

After the conveyor C is stopped, the elevating rod 30 descends and is moved to a predetermined position, and then the elevating rod 30 is pulled up to fix the jig 1 again in about 15 seconds. In this case, this time is within the minimum time for stopping the conveyor C and performing various operations on the work W on the pallet P.

[0030]

According to the present invention, since a series of steps of fixing, moving and re-fixing the jig can be performed in a short time of tens of seconds, the jigs can be sequentially performed during the stop of the conveyor which is intermittently fed in the flow work.

Further, a series of operations for releasing, moving and re-fixing the jig is a series of lowering, moving and raising the lifting rod of the computer controlled moving mechanism arranged above the jig. By the operation, the jig can be automatically and accurately and surely without shifting.

Then, the next work of a different size can be immediately set and held on the pallet for which the movement adjustment of the jig has been completed, so that there is no waste of time waiting.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a jig fixing state according to the present invention.

FIG. 2 is a vertical cross-sectional front view of the present invention when the jig is released.

FIG. 3 is a plan view showing a state in which the jig of the present invention is installed on a pallet.

FIG. 4 is a bottom view of a moving mechanism arranged above the pallet so as to correspond to the jig.

FIG. 5 is a side view of the moving mechanism.

FIG. 6 is a plan view of a pallet fixed on a conveyor.

[Explanation of symbols]

1 Jig 3 Round hole 4
Bottom wall 6 Square hole 7 Slit 8
Guide protrusion 10 Lock pin 11 Flange 12
Compression coil spring 13 Ball 15 Lock plate
16 Convex part 18 Eccentric cam 19 Upper lever
20 Lower lever 21 C-type lever 22 Horizontal pin
25 rail 30 lifting rod 31.32.33. roller
35 moving mechanism

Claims (2)

[Claims] 1. A jig 25 having a work guide 2 on its outer side is fixed to the upper surface of the pallet P with a C-shaped channel-shaped rail 25 with its opening edge 26 facing upward. It is slidably arranged and has a flange 11 on the upper end.
A lower end of the lock pin 10 can be moved vertically below the bottom wall 4 of the jig 1 by interposing a compression coil spring 12 between the flange 11 of the lock pin 10 provided with and the bottom wall 4 of the jig 1. And the lower end is fixed to a lock plate 15 slidably provided inside the rail 25.
An eccentric cam 1 which is located above the lock pin 10 therein and which is brought into contact with and separated from the upper end of the lock pin 10 about a horizontal pin 22.
8 is rotatably arranged, a C-shaped lever 21 is provided on the eccentric cam 18 so as to project obliquely upward, and a C-type lever 2 is arranged by lowering an elevating rod 30 arranged above the jig 1.
1, the eccentric cam 18 is rotated, and the lock plate 15 that fixes the rail 25 between the bottom wall 4 of the jig 1 by the action of the compression coil spring 12 is fixed to the lock pin 10.
The jig 1 is moved freely by following the movement of the elevating rod 30 along the rail 25 by pushing down the elevating rod 30 to move the jig 1 to the rail 25 by the pressure of the compression coil spring 12. A jig position adjustment device that can be fixed. 2. The ball 1 is provided at the upper end of the center of the lock pin 10.
The jig position adjusting device according to claim 1, wherein the jig 3 is rotatably provided.