JPS635209B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for positioning a workpiece such as a spline at a constant angular phase position.

In order to automatically assemble workpieces such as splines, conventionally the workpieces were fed to a predetermined position from a chute.
This is done by moving the work holder forward and engaging the splines of the work and the splines of the holder. If the splines of the workpiece and the splines of the holder do not match, pull the holder in, rotate it 2° to 3°, and move it forward again. If the splines still do not fit together, the operation is repeated until they mesh.

Such conventional devices have the disadvantage that the mechanism is very complicated and the hydraulic and electrical circuits are difficult.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a novel configuration that is simple in structure and yet can reliably align the workpiece.

The present invention will be described below with reference to the drawings. A workpiece 10 is an internal spline (or internal gear) having a wheel on its inner periphery. The workpiece 10 is fed over a chute 12 having an inclined bottom surface. A first guide 14 is provided near one end of the chute 12;
It serves to temporarily stop the work at a position indicated by 10', hereinafter referred to as the first position. 1st guide 1
4, a pair of side panels 16 and a ceiling panel 18
A second guide (FIG. 2) is arranged which temporarily stops the workpiece in a position indicated by 10'' and hereinafter referred to as the second position.
The center with the position is indicated by O ₁ and O ₂ respectively, and δ in Figure 2
There is a discrepancy as shown in .

Reference numeral 20 denotes a claw member that meshes with the teeth of the workpiece, and the workpiece 1 is moved by the horizontal drive cylinder 22 as shown by arrow A in the figure.
0 horizontally in the direction of the center hole, and at the same time, is moved up and down on a vertical line 25 passing through the center O ₂ of the second position 10'' of the workpiece by the vertical drive cylinder 24 in the direction of arrow B.

A spline holder 26 receives the workpiece positioned by the claw members 20. The holder has projections and depressions that engage with the teeth of the spline, and has a notch 26a that engages with the claw member 20.
The holder 26 can be driven back and forth as shown by arrow C, and in horizontal planes on the left and right as shown by arrow D.

A spline collet 30 serves to grip the workpiece held by the holder 26.

Next, to describe the operation, the workpiece 10 introduced from the sheet 12 is moved to the first position of 10' by the guide 14.
Stop in position. As the cylinder 22 is driven, the claw 20 moves forward and enters the workpiece at the position 10'.
At this time, the claw 20 is at the center of the workpiece 10 as shown in FIG.
It is eccentric to O ₁ .

Next, as the cylinder 24 is driven, the pawl 20 rises and comes into contact with the teeth of the workpiece 10 at the position 10'.
At this time, the unevenness of the workpiece and the unevenness of the claw 20 do not necessarily mesh with each other at first, but the center line of movement of the claw 20
5 is eccentric from the center O ₁ of the workpiece at the start, the workpiece rotates in the direction of arrow E under its own weight after the claw 20 and the workpiece engage. Therefore, while rising, the unevenness of the workpiece and the unevenness of the claw 20 are sure to mesh with each other, and the workpiece and the claw 20 come to the second position indicated by 10''.
By meshing with 0, the angular phase of the workpiece is always held constant.

After that, the spline holder 26 moves forward, but
Since the angular position of the workpiece is held constant,
The workpiece is fitted into the holder 26 and removed from the claw 20 by the retreat of the holder 26. Then, by moving the holder in the direction of arrow D and moving it forward in the direction of arrow C, the workpiece 10 can be transferred to the collet 30.

As described above, in the present invention, by starting the claw 20 eccentrically with respect to the center _O1 of the work, the claw and the work can be reliably engaged and positioning can be performed.

FIG. 3 shows a case where the workpiece 110 has external teeth, and in this case, the pawl 120 has a shape that can mesh with the external teeth of the workpiece. The manner in which the pawl 120 is initially started from an eccentric position is the same as in the previous embodiment.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of the device of the present invention, FIG. 2 is a side view, and FIG. 3 is a diagram showing the shape of a claw member according to a modified example. 10... workpiece, 10'... first position of workpiece,
10″...Second position of workpiece, 12...Shoot,
14...first guide, 16, 18...second guide, 20...claw member.

Claims (1)

[Claims] 1. A chute for a workpiece having teeth formed on the inner or outer periphery of a spline, etc.; a first guide provided at one end of the chute to hold the workpiece in a first position; and a first guide located above the stopper. , a second guide that holds the workpiece in a second position whose center is laterally shifted from the first position;
It consists of a claw member that moves up and down on a vertical line passing through the center of the position and holds the workpiece rotatably by its own weight, and a means for driving the claw member to move the workpiece from the first position to the second position, so that the workpiece is in the first position. A workpiece such as a spline, which is characterized in that the workpiece rotates by its own weight due to eccentricity until the teeth of the workpiece engage with a pawl member when moving from the first position toward the second position, and thereafter is held in the engaged state. positioning device.