JPH05220686A - Bore chuck mechanism - Google Patents

Abstract

PURPOSE:To always conform the bore center of a top disk to the shaft center of a chuck at the time of holding a plurality of discs in parallel by the chuck. CONSTITUTION:The depth of a groove 3 on a front edge side 2a provided on a claw 2 is minimized, and the depths of grooves 4, 5, 6 on the rear edge side 2b are set gradually deeper, so that a top disc is held in the state perfectly fitted to the groove, and the bore center of the top disc is conformed with the shaft center L of a chuck 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chuck mechanism used in general industrial equipment, and more particularly to an inner diameter chuck mechanism for gripping the inner diameter of a disc.

[0002]

2. Description of the Related Art In a conventional inner diameter chuck mechanism, as shown in FIG. 4, three claws 22 are radially opened and closed by a chuck 23, the claws 22 are fitted into an inner diameter side opening 21a of a disk 21, and the disk 21 The opening edge 21b is received in the groove 22a of the claw 22 to grip the disk 21.

In the conventional inner diameter chuck mechanism, the number of disks 21 to be held is limited to one.

[0004]

However, this conventional inner diameter chuck mechanism cannot hold a large number of discs.

Further, when a plurality of discs are forcibly gripped and grooves of the same shape are formed on the claw, the disc with the smallest inner diameter is gripped due to an error in the disc inner diameter, and it is not always the first. There is no guarantee that the center of the inner diameter of the disk and the axis of the inner diameter chuck will match, and this has hindered handling and positioning by a robot or the like.

It is an object of the present invention to provide an inner diameter chuck mechanism in which the center of the inner diameter of the leading disk and the axial center of the chuck coincide with each other when a plurality of disks are gripped.

[0007]

In order to achieve the above object, an inner diameter chuck mechanism according to the present invention is an inner diameter chuck mechanism having a chuck, at least three claws, and a groove, and the chuck is at least The three claws are opened and closed in a radial direction orthogonal to the axis, and at least three claws are fitted in the inner diameter side opening of the disc and abut on the opening edge so that the plurality of discs are arranged in parallel. A plurality of grooves are provided along the length direction of the claw to receive the opening edge of the disc, and the depth of the groove gradually increases from the front edge side to the rear edge side of the claw. It is set to be deep in.

[0008]

The plurality of grooves provided along the front edge side and the rear edge side of the claw are set so that the depth gradually increases.
Therefore, when supporting a plurality of discs, the groove on the leading side has the smallest diameter, and the leading disc is always held in the groove of the claw, and the inner diameter center of the leading disc and the chuck The axis matches.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG.
It is sectional drawing which shows the nail | claw which concerns on this invention.

In the figure, the inner diameter chuck mechanism according to the present embodiment includes a chuck 1, at least three claws 2 (three in the embodiment), and grooves (four rows of grooves in the embodiment) 3, 4, and 5. ，
6 and 6.

The chuck 1 opens and closes the three claws 2 in three radial directions orthogonal to the axis L.

The three claws 2 are formed on the inner diameter side opening 7 of the disk 7.
The disk 7 is fitted in a and abuts against the opening edge 7b to support the plurality of disks 7 in parallel.

A plurality of grooves 3 to 6 are provided along the length direction of the claw 2 to receive the opening edge 7b of the disk 7, and the depth of the grooves 3 to 6 is the front edge side 2a of the claw 2. Is set so as to gradually deepen toward the trailing edge side 2b.
That is, the depth of the groove 3 located on the front edge side 2a of the claw 2 is set to have the smallest diameter, and the depth of the groove is set to increase toward the rear edge side 2b.

Next, the operation will be described with reference to FIG. Figure 3
4 from disk 8 to disk 11 as shown in (a)
When one disk is chucked by the chuck 1, the inner diameter opening edge 8a of the leading disk 8 is received and gripped by the groove 3 on the front edge side 2a having the shallowest groove depth among the grooves of the claw 2, and the disk is held. The center of the inner diameter of 8 and the axis L of the chuck 1 coincide.

Regarding the other disks 9 to 11, since the grooves face the groove 4 having a shape deeper than the groove 3, the inner diameter opening edges 9a, 10 of the disks 9, 10, 11 are opposed to each other.
The a and 11a do not completely contact the grooves 4, 5 and 6 of the claw 2. Therefore, if a disk having an inner diameter slightly smaller than the inner diameter of the disk 8 is transferred from the disk 9 to the disk 11.
Even if inside, the center of the disk 8 and the chuck 1
It does not hinder the coincidence with the axis L of.

Next, the case where the chuck 1 chucks the disks 10 and 11 as shown in FIG. 3B will be described. At this time, the inner diameter of the leading disk 10 and the groove 5 are completely in contact with each other and gripped at this point, and the center of the inner diameter of the disk 10 and the axis L of the inner diameter chuck are aligned.

The distance R from the shaft center L of the inner diameter chuck of the claw 2 at that time is R> r, where r is the distance when four pieces are gripped.

Similarly, when there are three discs, the inner diameter of the leading disc 9 and the groove 4 are completely in contact and gripped at this point, and the center of the inner diameter of the disc 9 and the axis L of the inner diameter chuck coincide. ..

Although the number of grooves is four in this embodiment, the number of grooves may be two or more in the present invention.

[0020]

As described above, according to the present invention, by forming a groove that gradually becomes deeper from the leading edge side to the trailing edge side in the multiple-sheet picking claw fixed to the chuck, only the leading disk always has its groove. The center of the inner diameter and the axial center of the chuck can be aligned and gripped.

Therefore, it is possible to avoid a handling error or a trouble due to the displacement of the center when the disk is handled or positioned by a robot or the like.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a claw according to the present invention.

FIG. 3 is a cross-sectional view showing a state where a disc is chucked.

FIG. 4 is a perspective view showing a conventional example.

[Explanation of symbols]

 1 chuck 2 claws 3, 4, 5, 6 groove 7, 8, 9, 10, 11 disk L chuck 1 axis r chuck 1 axis L and claw 2 distance R chuck 1 axis L and claw Distance to 2

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI Technical display location G11B 5/84 Z 7303-5D 23/00 B 7201-5D

Claims (1)

[Claims] 1. An inner diameter chuck mechanism having a chuck, at least three claws, and a groove, wherein the chuck opens and closes at least three claws in a radial direction orthogonal to the axis. At least three claws are fitted into the inner diameter side opening of the disc and abut against the opening edge to support a plurality of the discs in parallel. A plurality of grooves are provided along the length direction of the claw. Is to receive the opening edge of the disc, and the depth of the groove is
An inner diameter chuck mechanism, wherein the inner diameter chuck mechanism is set so as to gradually become deeper from the front edge side of the claw toward the rear edge side.