JPS59142007A - Chuck device - Google Patents

Abstract

PURPOSE:To secure both relative position and timing between a workpiece being transported and a collet chuck by restraining the movement of said collet chuck in the direction vertical to an index table and allowing claws to be opened and closed only in the radial direction. CONSTITUTION:In a chuck device 14, the claw part 16 of the chuck 14 holds an electrolytic capacitor 20, which is transported to an automatic transporting device (not shown) in the front stage, by means of an index table 2 which makes intermittent rotating movement at a certain timing. The workpiece 20 undergoes a curling process, etc. and transferred to an automatic transporting device (not shown) in the rear stage to undergo another processing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chuck device for an object to be conveyed in an automatic assembly machine for electrolytic capacitors, etc., and in particular to a device for gripping an object to be conveyed without moving the collet chuck in its axial direction at all, and for chucking the object. The present invention relates to a chuck device that can be released to ensure the positional relationship between a conveyed object and a collet chuck.

In a conventional chuck device of this type, a collet chuck was configured to slide up and down with respect to an index table. In other words, the collet chuck slides upward and its claws become free and open to receive the conveyed object, and then slides downward and the claws close and open to receive the conveyed object. I was beginning to grasp it.

By the way, the chuck device installed on the index table also constitutes a part of a series of automatic conveyance devices, and the series of automatic conveyance devices can only perform its work if the positional relationship and timing of all of them are reliably maintained. It is something that maximizes efficiency.

However, in the conventional technology, the collet chuck of the chuck device slides vertically relative to the index table with respect to the transported object with a predetermined positional relationship and timing, so the positional relationship between the collet chuck and the transported object is This method also has the disadvantage that the timing is uncertain, and the receiving and passing of the conveyed objects cannot be carried out smoothly.

The present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and its purpose is to restrain the movement of the collet chuck in the chuck device in the vertical direction with respect to the Intex table, so that the jaws thereof can be restrained. The collet chuck moves only in the radial direction to open and close to receive and grip the conveyed object, thereby ensuring the positional relationship and timing between the conveyed object and the collet chuck, and This improves the assembly precision of products in an automatic assembly machine, and further improves the work efficiency of a series of automatic conveyance devices in the automatic assembly machine.

In short, the present invention provides an object equipped with at least two claws that can open and close an object to be transported, such as an electrolytic capacitor, in the radial direction of the object, grip it from at least two directions, and release it at a predetermined timing. a collet chuck configured to elastically open with respect to an index table that rotates intermittently in a free state so that the claw portion can release the conveyed object; and a collet chuck that slides vertically on the index table. a collet chuck opening/closing member that is freely inserted and inserted so that its upper opening abuts the lower surface of the claw portion of the collet chuck; and pressing the collet chuck opening/closing member in a direction in which the claw portion of the collet chuck closes. The collet chuck opening/closing member is characterized by comprising an elastic body and a suppressing member that presses the collet chuck opening/closing member in a direction in which the claw portion of the collet chuck opens against the pressing force of the elastic body. .

The present invention will be explained below based on embodiments shown in the drawings. 1st
2 and 3, a chuck device 1 is attached to a part of an index table 2 that rotates intermittently at predetermined timings, and the chuck device 1 is attached to a part of an index table 2 that rotates intermittently at predetermined timings. A circular opening 2a is formed vertically through the opening 2a, and counterbore portions 2b+2C concentric therewith are formed at the upper and lower parts of the opening, respectively. The upper and lower counterbore portions are in communication with each other through vertical round holes 2d and 2e located opposite to each other in the radial direction, and the round holes are respectively reduced by the lower blade to form a round hole 2f. 2
g. Further, a hole 2h for preventing rotation of related members is formed in the lower counterbore portion 2C.

A fixing plate 3 is fixed to the lower counterbore portion 2C, and the fixing plate has a circular center hole 3a, and notches 3b and 3c facing radially from the center hole. is formed. The fixing plate 3 is fixed to the lower counterbore 2C by a pair of tightening screws 4 and 5 through through holes 3d and 3e formed in the fixing plate.

A collar member 6 is press-fitted into the opening 2a of the index table 2. Next, a housing 7, which is an example of a collet chuck opening/closing member, is inserted into the opening 2a. A flange portion 7b and a collar portion 7C are formed concentrically with this portion. A pair of opposing notches 7d are formed below the cylindrical portion 7a, and therefore a pair of opposing legs 7f and 7g are formed below the cylindrical portion 7a. Further, the seventh rank portion 7b has a pair of through holes 7b facing each other in the radial direction.
71 is formed, and another through hole 7j is formed to prevent rotation of the housing 7 and the housing 70. In addition, the inner surface 7h of the collar portion 7C is in the shape of a taper that becomes narrower from the top to the bottom. Also, the cylindrical portion 7a is formed with a horizontal hole 71 for guiding related members. A guide pin 8 is inserted into the side hole.

The housing 7 is inserted into the opening 2a of the index table 2, the flange part 7b of the housing fits into the upper counterbore part 2b of the opening, and the lower leg parts 7f and 7g of the circular restraint part 7a are connected to the fixing plate 3. It is adapted to engage with the notches 3b and 3C of.

Next, the positioning pin 9 is inserted into the through hole 7j formed in the flange portion 7b of the housing 7 and the hole 2h formed in the lower counterbore portion 2C of the opening 2a, and the housing 7 is inserted into the opening 2a.
Regarding L7, it is positioned and prevented from rotating.

A coil spring 10, which is an example of an elastic body, is installed in each of the round holes 2d and 2e that connect the upper and lower probing portions 2b+2C of the opening 2a.
．． 11 is inserted, and the upper end of the coil spring is connected to the housing 7.
The housing is pressed against the lower surface of the flange portion 7b to constantly press the housing upward. The through holes 7h and 7t of the flange and the round holes 2d and 2e of the rounded portions 2b+2c
Butches 12 and 13, which are examples of suppressing members, are inserted through the coil springs 10 and 11, respectively. Gutsushabin 12.13 is the spine 12a.

13a and shaft portions 12b and 1ab, respectively, the heads of which are located on the upper surface of the flange portion 7b, and the lower portions of the shaft portions are located within the downwardly reduced portions 2f and 2g- of the round hole 2d+2e, respectively. It is supposed to be done. Therefore, 12.
By pressing the head 12a+ 138 of 13 downward, the housing 7 is made to slide downward against the coil spring 10.11.

Next, the housing 7 accommodates a collet chuck 14. The collet chuck is composed of a base 15 and a claw 16, and the base has a screw hole 15a.
is formed, and a vertical guide groove 1 is formed on the outside.
5b is formed. The claw portion 16 is an enlarged upper portion 16a.
and a lower reduced portion 16b, the enlarged portion has an upper surface 16C tapered upward, and a lower surface 16C thereof.
d has a tapered shape that becomes thinner toward the bottom. Further, the claw portion 16 is formed with a through hole 16e that communicates with the upper end of the screw hole 15a of the base portion 15 along its central axis, and furthermore, the claw portion 14 has four holes formed opposite to the center of the through hole. Two grooves 16f, 16g.

It is divided into four parts 1eh and 1si, and is given elasticity so that it can open and close in the radial direction. Note that the through hole 16e is enlarged in the middle and forms a space 16j.

It's being transported again! A positioning pin 17 for supporting a conveyed object such as a capacitor 20 at a predetermined level is inserted into the collet chuck 14 from its base 15, and then the collet chuck is housed in the housing 7. The positioning bin 17 has an enlarged part 17a formed in the middle thereof, and the positioning bin 17 has an enlarged part 17a formed in the middle thereof.
b and a lower bin portion 17C. Housing 7
Inside, the collet chuck 14 is fixed to the fixing plate 3 by fixing screws 18. The fixing screw has head 1
8a, a threaded portion 18b, and a boss portion 18C provided at the tip of the threaded portion, and further provided with a shaft hole 18d along its central axis.

Inside the housing 7, the base 15 of the plet chuck 14 is supported on the fixing plate 3, and the fixing screw 18 is screwed into the threaded hole 15a of the base 15 of the collet chuck 14 from the lower side of the fixing plate through the center hole 3a. fixed plate 3
Fixed. At this time, the lower pin part 17C of the positioning pin 1''7 is inserted into the shaft hole 18C of the fixing screw 18, and the enlarged part 17a of the positioning pin 17 is inserted into the boss part 18C of the fixing screw 18 within the space 16j of the collet chuck 14. Further, the upper part of the upper bin part 17b of the positioning bin 17 is located in the through hole 16e of the claw part 16 of the collet chuck 14. In this case, the top part 17d of the upper bin part 17b is supported.
1, that is, the position of the top portion 17d for supporting the conveyed object such as the electrolytic capacitor 20 is determined by the screwing degree of the fixing screw 18.

During assembly, the guide pin 8 is inserted into the horizontal hole 71 formed in the cylindrical portion 7a of the housing 70, and its free end is inserted into the guide groove 1 formed in the base 15 of the collet chuck 14.
5b, the outward movement of the guide pin 8' is prevented by the collar member 6. In addition, in this assembly state, the tapered inner surface 7h of the collar portion 7C of the nozzle 7 is connected to the enlarged portion 1 of the claw portion 16 of the cigaret chuck 14 by the action of the coil spring 10.11.
The claw portion is brought into a closed state by contacting the tapered lower surface 16d of 6a.

Upper counterbore portion 2b formed on index table 2
is closed with a cover plate 30. The cover plate is approximately circular and has a center hole 30a and a pair of holes 30b and 30C formed radially opposite to each other with respect to the center hole, and has a collar portion concentric with the center hole 3Qa on its lower surface. 30d is formed. The cover plate 30 is fixed to the index table by three countersunk screws 31, 32, and 33 through countersunk screw through holes 306.30f and 30g formed in the cover plate, and in this case, the collet chuck 14
The enlarged claw portion 116a of the claw portion 16 and the collar portion 7C of the nozzle 7 are concentrated upward from the center hole 30a of the cover plate.
Parts of the holes 30b and 30C of the cover plate 30 respectively protrude upward.

The present invention is constructed as described above, and its operation will be explained below. In Figures 1, 2 and 3,
The chuck device 1 is an automatic conveyance device (not shown) in which the jaws 16 of the cigaret chuck 14 are moved by the intermittently rotating movement of the Intex table 2 at predetermined timings.
grips the conveyed object, for example, the electrolytic capacitor 20, and after the electrolytic capacitor is subjected to a process such as curling, it is delivered to a subsequent automatic conveyance device (not shown) for further processing. is now being applied. That is, when the electrolytic capacitor 20 is conveyed at the same timing when the chuck device 1 is stationary, the heads x2a+ 138 of the butshabins 12 and 13 are moved as shown by arrow A by an automatic device (not shown). The index table 2 is pressed downward. Therefore, the housing 7 slides downward within the opening 2a of the index table 2 against the coil springs 10, 11, and the collar portion 7
C(7) The tapered inner surface 7h is separated from the tapered lower surface 16d of the claw portion 16 of the collet chuck 14. Therefore, the claw portion is in a free state and opens in the radial direction due to its elasticity. The electrolytic capacitor 20 transported at this time is placed on the top 17d of the positioning bin 17.

Next, when the pressing force on the bushings 12 and 13 is removed, the housing 7 slides upward against the index table 2 due to the pressing force of the coil springs 10 and 11, and the tapered inner surface 7h of the collar portion 7C. comes into contact with the tapered lower surface 16d of the claw portion 16. Therefore, the claw portion closes in the radial direction and grips the electrolytic capacitor 20. Thereafter, the INTEX table 2 starts rotating, and after the N and M capacitors 20 are subjected to a predetermined process such as curling, when they are transported to a predetermined position, the push pins 12 and 13 are suppressed downward again. Claw portion 16 of collet chuck 14
opens in the radial direction, releases the electrolytic capacitor 20, and transfers the electrolytic capacitor to a subsequent automatic transport device.

In this embodiment, the claw portion 16 of the collet chuck 14 is shown divided into four parts by the grooves xsf, 16g, 1sh, and xsi, but the claw part may be divided into two or three parts by the grooves 16f and 16h. Further, the housing 7 is prevented from rotating within the opening slot 2a by the vertical pin 9, and the horizontal pin 8 prevents the housing 7 from rotating within the chuck opening 2a. Since it is guided along the index table 2, its vertical movement relative to the index table 2 is ensured. Further, the collet chuck 14 is fixed to the index table 2, and the housing 7 as a collet chuck opening/closing member does not slide vertically with respect to the index table 2, so the mutual positional relationship and timing of the collet chuck 14 and the transported object are Welfare will be ensured.

Since the present invention is configured and operates as described above, the collet chuck of the chuck device is fixed so as not to slide vertically relative to the index table,
Since the claw portion moves only in the radial direction to open and close to grip the conveyed object, the distance between the conveyed object and the collet chuck is 11r! Person A and timing will be reliable 5
cjJJIL is obtained.

Further, as a result, the assembly accuracy of products in the automatic assembly machine can be improved, and the working vehicles of the series of automatic conveyance devices in the automatic assembly machine can be further improved.

[Brief explanation of the drawing]

1iBJ relates to an embodiment of the present invention, in which Fig. 1 is an external perspective view of a collet chuck device attached to an index table, Fig. 2 is a longitudinal sectional view of the collet chuck device, and Fig. 3 is a collet chuck device. FIG. 1 is a chuck device, 2 is an index table, 7 is a housing that is an example of a collet chuck opening/closing member, 7C is an upper opening, 10.11 is a coil spring that is an example of an elastic body, 12.13 is a washer bin that is an example of a suppressing member, 14
1 is a collet chuck, and 16 is a claw portion. % Applicant: 7 East Engineering Co., Ltd. Patent Attorney Kazuo Uchida, Figure 1

Claims (1)

[Claims] A device equipped with at least two claws that can open and close an object to be transported, such as an electrolytic capacitor, in the radial direction to grip it from at least two heights, and to release it intermittently at a predetermined timing. A collet chuck is configured such that the claw portion elastically opens with respect to the rotating index table in a free state so as to release the conveyed object, and the collet chuck is fitted into the index table so as to be slidable in the vertical direction. a collet chuck opening/closing member whose upper opening abuts the lower surface of the claw portion of the collet chuck; an elastic body that presses the collet chuck opening/closing member in a direction in which the claw portion of the collet chuck closes; A chuck device comprising: a suppressing member configured to press the collet chuck opening/closing member in a direction in which the i-th claw portion of the collet chuck opens against the pressing force of the elastic body. −