JP2630178B2 - Work positioning jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved technique for a jig for stacking and stocking a large number of workpieces and aligning (hereinafter, centering) the stacked workpieces.

[0002]

2. Description of the Related Art Conventionally, when a work is supplied to a machine tool by a robot or a loader hand, a stocker such as an index table or a rotary work feeder for stacking and stocking a large number of works has been used. A jig is used so that the center of the works to be stacked is constant so that the setup can be easily changed even if the specifications or the like are changed. For example, as shown in FIGS. 7 and 8, a crescent-shaped opening 1 is formed on a work mounting plate 1 on which a work is mounted and a cover 2.
a, 1a, 2a, 2a, etc., and planetary gears 4, 4 rotatably supported between the cover 2 and the gear case 3.
An internal gear 5 that is rotatable along the outer circumference by meshing with the planetary gear 4 is disposed, and a knob 7 projects outside the internal gear 5, and a guide rod 6 is erected on the planetary gear 4. The openings 1a, 1a, 2a, 2a,.
It is configured to protrude further upward and rotate the planetary gears 4. 4 by rotation of the internal gear 5. The workpieces are stacked on the workpiece mounting plate 1 of the positioning jig thus configured, and the knob 7 is moved. When rotated, the internal gear 5 is rotated to rotate the planetary gears 4.4.4, and the rotation of the planetary gears 4,4.4.4 causes the guide rods 6.6.6 to open the openings 1a.1a. The workpiece is moved to the center side along 1a so that the work is centered.

As another structure, as shown in FIG. 9, a sun gear 9 is rotatably arranged at the center, and gears 10, 10, 10 are rotatably arranged around the sun gear 9 on the same radius. And mesh with the sun gear 9,
The guide rods 11, 11 and 11 are erected on 10 respectively,
Crescent-shaped openings 12a, 12a opened in the cover 12.
When the workpieces are projected upward from 12a and stacked one on top of the other and one of the guide rods 11 is moved toward the center, the gear 1
0 is rotated, the sun gear 9 is rotated, and the other gears 10 are simultaneously rotated to guide the guide rod 11 erected on the gear 10.
Therefore, the work is also moved in the center direction to center the work.

[0004]

However, the positioning jig constructed in this way requires the use of gears of the number of guide rods and gears at the center or outside, and also requires a bearing or the like to make the rotation smooth. Since it had been used, the material cost was high, and it was necessary to assemble it with high precision, so that the manufacturing cost was high. Since centering is performed while rotating the guide rod in an arc shape, the work may also rotate due to friction with the guide rod, and the friction may cause circumferential displacement or damage. Also, the guide rod moves along an arc-shaped trajectory.
Therefore, depending on the size of the work to be centered,
Robot hand to pick up a work in a fixed posture
The guide rod interferes with the position, etc.
In some cases, it was not possible to transfer the work.

[0005]

The first aspect of the present invention uses the following means to solve the above-mentioned problems. That is, in a positioning jig that aligns the centers of the work stacked in several stages, a pinion is arranged below the center of the work mounting plate, and a plurality of rack plates having a rack meshing with the pinion are radially arranged, Guide rods are erected at the ends of the rack plate, and the rack plate is placed below the work mounting plate.
The rate is slidable radially around the pinion.
The rack plate insertion hole
Narrower than the entrance hole, standing on another rack plate
Guide bar slide that guides the guide bar so that it can move in the radial direction
A rack holder having a moving hole;
The rack plate insertion holes and other rack plate
Guide rod sliding holes so that they match each other.
Place these rack holders on the top plate
And a bottom plate.
The rack plate guided by the plate insertion hole is
By sliding in the radial direction around the pinion,
That is what you want to do . According to a second aspect of the present invention, in addition to the configuration of the first aspect, a pinion insertion hole is formed in each of the rack plates, and a rack is formed on one longitudinal side of the pinion insertion hole. .

[0006]

According to the first aspect of the present invention, when one guide rod is moved in the radial direction around the pinion, the pinion is rotated by the rack plate on which the guide rod is erected, and the pinion is rotated. Accordingly, another rack plate (guide bar) meshed with the pinion similarly moves in the radial direction around the pinion. Also,
The rack plate insertion holes provided in the
Sliding of the rack plate around the nonion in the radial direction
Is guided. The top and bottom of the rack plate
Plate, rack holder or bottom plate
It slides between the plates. According to the second aspect of the invention, by inserting the pinion into the pinion insertion hole, the rack formed on one side in the longitudinal direction of the pinion insertion hole meshes with the pinion.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The problems and means to be solved by the present invention are as described above. Next, embodiments of the present invention shown in the accompanying drawings will be described. 1 is a plan view of a positioning jig of the present invention, FIG. 2 is a sectional view taken along line XX in FIG. 1, FIG. 3 is a plan view of a rack holder, FIG. 4 is a plan view of a rack plate, FIG. Is a top plate plan view.

As shown in FIGS. 1 and 2, the positioning jig of the present invention is assembled so as to overlap a circular bottom plate 15, rack holders 16, 16, 16, top plate 19, and work mounting plate 20. Has been
Each is made of a steel plate and formed by punching. On the work mounting plate 20, guide rods 22 project upward, and the guide rods 22
After the work is placed in the center between the two and is centered, the work placing plate 20 is raised, taken out by a robot hand or the like, and supplied to a machine tool such as a lathe. I have.

As shown in FIG. 3, the rack holder 16 has a rectangular rack plate insertion hole 16a in the diameter direction, and a rack plate 17 is inserted into the rack plate insertion hole 16a so as to be slidable in the radial direction. Guide rod sliding holes 16b, 16b are opened in the radial direction at positions shifted by 120 ° from the rack plate insertion hole 16a, and guide rods 22 erected on another rack plate 17 are inserted in the radial direction. I can guide you to. A lift rod through hole 16c is opened on one side of the guide rod sliding hole 16b, and a bolt insertion hole 16d is opened on the other side, and rack fastening holes 16e and 16e are opened on both sides of the guide rod sliding hole 16b. Each of the holes is also opened at a position shifted by 120 °, and when three rack holders 16, 16 and 16 configured in the same shape are stacked, they are shifted by 120 ° so that the holes are aligned. It is composed.

As shown in FIG. 4, the rack plate 17 has a guide rod 22 at one end (circumferential side) and a set screw 25 (FIG. 2) for fixing a lower end. A hole 17a is opened, and a pinion insertion hole 17
b is opened, and a rack 17c is formed on one longitudinal side of the pinion insertion hole 17b, and the rack 17c is formed by laser processing or the like. The pinion 21 is inserted into the pinion insertion hole 17b so as to mesh with the rack 17c, and the pinion 21 is meshed with other racks 17c.

As shown in FIG. 5, the bottom plate 15 radially opens an oval escape hole 15a so that the lower end of the set screw 25 does not come into contact with the bottom plate 15. Since only the guide rod 22 erected at the position interferes, only one is provided. A pinion support hole 15b is opened in the center, and a lift rod through hole 16c and a bolt insertion hole 16 opened in the rack holder 16 are provided.
d, lift rod through-holes 15c, bolt insertion holes 15d,
The rack fastening screw hole 15e is opened.

As shown in FIG. 6, the top plate 19 has a pinion support hole 19, like the bottom plate 15.
b, lift rod through hole 19c, bolt insertion hole 19d,
The rack fastening hole 19e is opened, and the guide rod sliding hole 19a is inserted into the rack plate insertion hole 1 of the rack holder 16.
6a and the guide rod sliding hole 16b are opened in an oblong shape. As shown in FIG. 1, the work mounting plate 20 has a guide rod sliding hole 19 formed in the top plate 19.
The guide rod sliding hole 20a is opened in accordance with a. The insertion hole 20b is opened so as to insert the upper end of the lift rod 23 in accordance with the lift rod through hole 19c. 16c ・ 15
c, the work placement plate 20 is raised by lifting when the work is taken out. Further, a through hole 20c is opened at the center of the work mounting plate 20 in correspondence with the pinion support hole 19b. In this embodiment, three guide rods 22 are shown, but four or more guide rods may be provided.

The workpieces are stacked and stocked on the workpiece mounting plate 20 of the positioning jig configured as described above.
When an arbitrary guide rod 22 is pushed toward the center, the rack plate 17 slides toward the center in the rack plate insertion hole 16a, and the pinion 21 is rotated by sliding of a rack 17c formed in the rack plate 17, Due to the rotation of the pinion 21, the other rack plates 17 are simultaneously slid in the center direction by the same distance, and the guide rods 22, 22, 22 are simultaneously moved in the center direction, whereby the work is centered.

[0014]

As described above, the present invention has the following advantages. That is, according to the first aspect of the present invention, the plate excluding the pinion and the like constituting the positioning jig can be manufactured by sheet metal processing, so that the manufacturing is easier than the conventional configuration using a spur gear, and the positioning accuracy is improved. Material costs, assembly costs, etc. could be significantly reduced without any change. In addition, since the guide rod is moved in the radial direction, centering can be performed at the shortest distance, and scratches and the like due to friction are minimized.
Furthermore, since the guide rod moves linearly in the radial direction, no matter what size the workpiece is moved, it can be used for a robot hand or the like that picks up a workpiece in a fixed posture. Can avoid interference,
Work transfer can be always performed well.
In addition, the rack plate can be rack-played on the rack holder.
Can be guided by the
The rate sliding in the radial direction (movement of the guide rod) is ensured.
Easy to perform and better centering work
You can do it. In addition, rack holder
Because each rack is
Simple processing to form the port insertion hole and guide rod sliding hole
It only needs to be done. Also, duplicate rack holders of the same shape
By preparing several sheets, the cost can be reduced.
You. Also, the rack plate always has the top and
Plate, rack holder or bottom plate
Stable sliding because it is sandwiched between the plates
It has the effect of being able to do it. According to the second aspect of the present invention, the rack can be more reliably and easily engaged with the pinion, and the assembling operation can be easily performed.

[Brief description of the drawings]

FIG. 1 is a plan view of a positioning jig of the present invention.

FIG. 2 is a sectional view taken along line XX in FIG.

FIG. 3 is a plan view of a rack holder.

FIG. 4 is a plan view of a rack plate.

FIG. 5 is a plan view of a bottom plate.

FIG. 6 is a plan view of a top plate.

FIG. 7 is a plan view of a conventional positioning jig.

FIG. 8 is a side sectional view of the same.

FIG. 9 is a plan view of another conventional positioning jig.

[Explanation of symbols]

 17 rack plate 17c rack 20 work mounting plate 21 pinion 22 guide rod

Claims (2)

(57) [Claims] In a positioning jig for aligning the centers of works stacked in several stages, a pinion is arranged below a center portion of a work mounting plate, and a plurality of rack plates having a rack meshing with the pinion are radially arranged. arrangement and, erected each guide rod on the end of said rack plate, said
Place the rack plate under the work loading plate.
A guide that slides radially around the nonion
Rack plate insertion hole and the rack plate insertion hole
Guide rods that are narrow and stand upright on other rack plates
With a guide rod sliding hole that guides it so that it can move in the radial direction.
A rack holder is provided for
Guide plate slides in the rack plate insertion hole and other rack plates
Position the holes so that the positions of the holes match each other.
Top and bottom of the rack holder
The rack plate is inserted between the plates.
Insert the rack plate guided by the hole into the pinion.
Centering by sliding in the radial direction as the center
Work positioning jig, characterized in that that. 2. The rack plate according to claim 1, wherein a pinion insertion hole is formed in each of said rack plates, and a rack is formed on one side in the longitudinal direction of said pinion insertion hole.
Work positioning jig.