JPH0593725U - Rotation direction positioning device for shaft parts - Google Patents

Abstract

(57) [Summary] [Purpose] To enable automatic and highly accurate positioning when assembling shaft parts. [Structure] A device for performing positioning by sandwiching a shaft component having a projection on its end face from both sides in the axial direction, wherein the sandwiching device on the projection side moves in the axial direction via a cylinder. A chuck portion having a plurality of roller claws formed so as to be detachable from the protrusion is provided at the tip, and a detector for detecting the sandwiched state is provided at a main portion. The chuck part is urged by a spring so as to be engaged with the detector and attached, and is formed so as to be rotatable by a servomotor.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotational direction positioning device for a shaft component, which is automatically positioned when the shaft component is assembled.

[0002]

[Prior Art]

 Generally, when assembling a cylindrical or columnar shaft part in an automobile part, etc., a protrusion or the like is formed on a part of the shaft part so that the protrusion or the like is at a fixed position with respect to the object to be assembled. Or, there is a case where a specific machined part is formed on the object to be assembled and the shaft part is assembled to the machined part in a fixed positional relationship.

In such a case, conventionally, for example, a mark for alignment has been previously attached to the shaft part, and a means for assembling on the basis of the mark or positioning after using an appropriate measuring instrument and then assembling has been used. Has been taken.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional positioning means, the alignment work is inefficient because the operator has to rely on the visual inspection of the worker, and the variation and deterioration of the alignment accuracy cannot be denied, and a countermeasure for this is strongly desired. It was rare.

The present invention has been made in order to meet such a conventional demand, and provides a rotational direction positioning device for a shaft component, which enables automatic and highly accurate positioning when the shaft component is assembled. The challenge is to provide.

[0006]

[Means for Solving the Problems]

 As a means for technically solving this problem, the present invention is a device for performing positioning by sandwiching a shaft component having a projection on its end face from both sides in the axial direction thereof with a sandwiching device. The pinching device on the protrusion side is formed so as to be movable in the axial direction via a cylinder, and a chuck part having a plurality of roller claws arranged so as to be disengaged from the protrusion is provided at the tip, and the main part is provided. Is provided with a detector for detecting the sandwiched state, and the chuck portion is attached by being biased by a spring so as to engage with the detector, and is formed so as to be rotatable by a servomotor. Is.

[0007]

[Work]

 The shaft parts that have been rolled and transferred from the previous process are sandwiched from both sides in the axial direction by a sandwiching device, the tip chuck part of one of the sandwiching devices is slowly rotated by a servo motor, and a plurality of roller claws are attached to the end surface of the shaft component. When it is removed from the protrusion formed on, the detector detects the completion of pinching. That is, when one of the roller claws is in contact with the protrusion, the spring is contracted and the chuck is in contact with the detector, but when all the roller claws come off the protrusion, the spring is restored. The chuck part is pushed forward by the force and disengages from the detector, and this time is the time when the sandwiching is completed, and the detector detects this. After this detection, the servo motor is rotated further by a predetermined angle to enable multi-point positioning of the shaft part.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In FIG. 1, reference numeral 1 is a sandwiching device on one side, which is provided with a chuck portion 1a for sandwiching an end portion of a shaft component W at its tip portion.

Reference numeral 2 denotes a sandwiching device on the other side, which is configured to be movable in the front-rear direction (left-right direction in the figure) along a guide rail 4 via a cylinder 3 installed on the side as shown in FIG. Is made.

A chuck portion 2a is provided at the tip of the other side of the pinching device 2, and a plurality of roller claws 2b are formed on the end surface of the shaft part W as shown in FIG. The pair of arcuate protrusions T are circumferentially arranged at predetermined intervals so that they can be simultaneously positioned at the respective edge portions. The chuck portion 2a is biased forward by a spring 2d to be attached to a mounting portion 2c of the sandwiching device 2, and is capable of moving to a certain extent in the front-rear direction with respect to the mounting portion 2c.

A shaft 2e is attached to a rear portion of the mounting portion 2c, and the mounting portion 2c is rotatably supported by the sandwiching device 2 via the shaft 2e, and a servo motor 5 provided above the sandwiching device 2 is provided. Is rotationally driven via a gear transmission mechanism 6. Therefore, the chuck portion 2a can rotate together with the mounting portion 2c.

Reference numeral 7 denotes a detector attached to the upper part of the pinching device 2 via a stay 8 so that the pinch state of the shaft part W can be detected by engaging with the chuck portion 2a.

The rotation direction positioning device for a shaft component according to the present invention is configured as described above, and when the shaft component W is rolled and conveyed, the shaft component W is chucked and first the sandwiching device 1 on one side is a cylinder. 3a, the clamping device 2 on the other side advances by the cylinder 3 to clamp both ends of the shaft part W, and the position of the shaft part W can be determined.

That is, when the chuck portion 2a of the other side clamping device 2 clamps the shaft component W, any one of the plurality of roller claws 2b is positioned on the arc-shaped protrusion T of the shaft component W. Then, the chuck portion 2a retracts by contracting the spring 2d and comes into contact with the detector 7 to detect that the pinching is not completed.

Based on this incompletion detection signal, the servo motor 5 is driven to cause the chuck portion 2a to rotate a little together with the mounting portion 2c, and the roller claw 2b moves in the circumferential direction to come off the protrusion T, as shown in FIG. When all the roller claws 2b are disengaged from the protrusion T as described above, the chuck portion 2a is pushed forward by the restoring force of the spring 2d and separated from the detector 7. As a result, it is detected that the shaft component W has the positioning claws (sandwiched). During rotation, the work W is clamped by another chuck to prevent co-rotation, and after the positioning claw is inserted, the chuck is unclamped and rotated to a predetermined position.

Further, based on the pinching completion detection signal, the shaft part W can be positioned with respect to the object to be assembled (not shown) by further rotating the servo motor 5 by a predetermined angle.

In this way, the shaft component can be automatically and accurately positioned with respect to the object to be assembled, and as a result, multipoint positioning can be performed corresponding to the object to be assembled. After positioning, although not shown, the shaft part is pushed into the object to be assembled by the pushing device or assembled, or the shaft part is conveyed to a predetermined place by an appropriate conveying means while maintaining the positioning, and the assembling machine The steps such as assembling into the object to be assembled are carried out.

Incidentally, the detector 7 changes the mounting position, changes the setting and, contrary to the above, issues a pinch completion signal when the chuck portion 2a comes into contact, and issues an incomplete detection signal when the chuck portion 2a is separated. It may be configured as follows.

[0019]

[Effect of the device]

 As described above, according to the present invention, a shaft component that has been rolled and conveyed is clamped from both sides by a clamping device, and a plurality of roller claws are provided on the end face of the shaft component on the chuck portion of one clamping device. It is arranged in the circumferential direction corresponding to the arc-shaped projection, and its chuck part is biased by a spring to be attached, and it is formed so as to be axially rotatable via a servo motor. Since the detector is provided, the shaft parts can be automatically positioned and multi-point positioning can be performed for the object to be assembled, significantly improving the assembly work efficiency and improving the assembly accuracy. The excellent effect of.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a plan view of the same.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a sectional view taken along line BB of the same.

FIG. 5 is a perspective view of a shaft component.

[Explanation of symbols]

1 ... Clamping device 1a ... Chuck part 2 ... Clamping device 2a ... Chuck part 2b ... Roller claw
2c ... Mounting part 2d ... Spring 2e ... Shaft
3, 3a ... Cylinder 4 ... Guide rail 5 ... Servo motor 6 ... Transmission mechanism 7 ... Detector 8 ... Stay W ... Shaft component T ... Arc-shaped projection

Claims (1)

[Scope of utility model registration request] 1. A device for performing positioning by sandwiching a shaft component having a protrusion on its end face from both sides in the axial direction thereof, wherein the sandwiching device on the protrusion side is in the axial direction via a cylinder. A chuck part having a plurality of roller claws that are movably formed on the tip and is arranged so as to be separated from the protrusion is provided, and a detector for detecting a sandwiched state is provided at a main part, and the chuck is provided. The rotational direction positioning device for a shaft component is characterized in that the part is attached by being biased by a spring so as to be engaged with the detector, and is formed so as to be rotatable by a servomotor.