JP2580362Y2 - Rotary direction positioning device for shaft parts - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for positioning a shaft part in a rotating direction, which can automatically position the shaft part when assembling the shaft part.

[0002]

2. Description of the Related Art Generally, when assembling a cylindrical or columnar shaft part in an automobile part or the like, a protrusion or the like is formed on a part of the shaft part, and the protrusion or the like is positioned at a predetermined position with respect to an object to be mounted. There is a case where the machined part is assembled in such a manner as to be as follows, or a specific machined part is formed in the object to be assembled, and the shaft part is assembled with the machined part in a fixed positional relationship.

In such a case, conventionally, for example, a mark for positioning is previously attached to the shaft component, and assembly is performed on the basis of the mark, or the assembly is performed after positioning using an appropriate measuring instrument. Has been adopted.

[0004]

However, in the above-mentioned conventional positioning means, the positioning operation is inefficient because the operator has to rely on the visual measurement of the operator. However, improvement measures for this were strongly desired.

SUMMARY OF THE INVENTION The present invention has been made in response to such a conventional demand, and has as its object to provide an apparatus for rotationally positioning a shaft part in which the positioning of the shaft part can be performed automatically and with high accuracy when the shaft part is assembled. Is the subject.

[0006]

According to the present invention, as a means for technically solving this problem, a shaft component having a projection on an end face is positioned by being sandwiched by a clamping device from both sides in the axial direction. A chuck unit that is formed so as to be movable in the axial direction via a cylinder, and has a plurality of roller claws disposed at the tip so as to be disengaged from the projection. The main part is provided with a detector for detecting the entrapment state, and the chuck part is attached by being urged by a spring so as to engage with the detector, and is formed to be rotatable by a servomotor. The gist is that.

[0007]

[Operation] The shaft component rolled and transferred from the previous process is clamped from both sides in the axial direction by a clamping device, and the tip chuck portion of one of the clamping devices is slowly rotated by a servomotor, and a plurality of roller claws are rotated. When it is removed from the protrusion formed on the end face of the sensor, the completion of the entrapment is detected by the detector. That is, when one of the roller claws is in contact with the protrusion, the spring is contracted and the chuck portion is in contact with the detector. The chuck portion is pushed forward by the force and detaches from the detector, and this time is the time when the entrapment is completed, and the detector detects this. After this detection, the servo motor is further rotated by a predetermined angle to perform multi-point positioning of the shaft component.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes a clamping device on one side, and a chuck portion 1 for clamping an end of a shaft component W at a tip end.
a.

Reference numeral 2 denotes a clamping device on the other side, which is formed so as 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. ing.

A chuck 2a is provided at the tip of the other-side clamping device 2, and the chuck 2a has a plurality of roller claws 2b formed on the end face of the shaft component W as shown in FIG. The pair of arc-shaped projections T are arranged at predetermined intervals in the circumferential direction so that they can be simultaneously positioned at the respective edge portions. The chuck portion 2a is urged forward by a spring 2d and is attached to the attachment portion 2c of the sandwiching device 2, so that the chuck portion 2a can move to some extent in the front-rear direction with respect to the attachment portion 2c.

The mounting portion 2c has a shaft 2e mounted on a rear portion thereof, is rotatably supported by the clamping device 2 via the shaft 2e, and receives a signal from a servo motor 5 provided on the upper portion of the clamping device 2. It is rotationally driven via a gear 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 portion of the sandwiching device 2 via a stay 8, and the chuck portion 2a
To detect the pinched state of the shaft component W.

The shaft component rotational direction positioning device according to the present invention is configured as described above. When the shaft component W is rolled and conveyed, the shaft component W is chucked, and firstly, the pinching device 1 on one side is turned into a cylinder. 3a, the clamping device 2 on the other side is moved forward by the cylinder 3 to clamp both ends of the shaft component W, thereby positioning the shaft component W.

That is, when the chuck part 2a of the other-side clamping device 2 clamps the shaft component W, one of the plurality of roller claws 2b is positioned on the arc-shaped projection T of the shaft component W. Then, the chuck portion 2a contracts the spring 2d and retreats to contact the detector 7 to detect that the entrapment is not completed.

On the basis of the incomplete detection signal, the servo motor 5 is driven to move the chuck 2a to the mounting 2c.
And the roller claw 2b moves in the circumferential direction and comes off from the protrusion T, and as shown in FIG.
Is released from above the protrusion T, the chuck portion 2a is pushed forward by the restoring force of the spring 2d and separates from the detector 7. Thus, the entry of the positioning claw (sandwich) of the shaft component W is detected. 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, the servo motor 5 is further rotated by a predetermined angle on the basis of the sandwiching completion detection signal, whereby the shaft component W can be positioned with respect to the workpiece (not shown).

In this manner, the positioning of the shaft component with respect to the workpiece can be performed automatically and with high precision, and as a result, multipoint positioning can be performed corresponding to the workpiece.
After the positioning, although not shown, the shaft component is pushed into the object to be assembled by a pushing device and assembled, or the shaft component is conveyed to a predetermined place by an appropriate conveying means in a state where the positioning is maintained, and the mounting machine is used. Steps such as assembling into an object to be assembled are performed.

It should be noted that the detector 7 changes the mounting position, changes the setting, and conversely, generates a pinch completion signal when the chuck portion 2a comes into contact, and generates an incomplete detection signal when the chuck portion 2a is separated. May be configured.

[0019]

[Effects of the Invention] As described above, according to the present invention,
Rolled and conveyed shaft component is clamped from both sides by the clamping device, and a plurality of roller claws are arranged in the chuck portion of one clamping device in the circumferential direction corresponding to the arc-shaped projections provided on the end surface of the shaft component. In addition, the chuck portion is attached by being urged by a spring, and is formed so as to be rotatable through a servomotor. Further, a pinch detector which engages with the chuck portion is provided, so that positioning of the shaft component can be performed. In addition to being able to be performed automatically, multi-point positioning with respect to the object to be mounted becomes possible, and excellent effects such as remarkably improving the efficiency of the assembling work and improving the assembling accuracy are achieved.

[Brief description of the 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.

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

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

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Clamping device 1a ... Chuck part 2 ... Clamping device 2a ... Chuck portion 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 parts T ... arc-shaped projection

Claims (1)

(57) [Scope of request for utility model registration] 1. A device for positioning a shaft component having a projection on an end face from both sides in the axial direction by a clamping device, wherein the clamping device on the projection side is positioned in a direction of an axis via a cylinder. A chuck portion having a plurality of roller claws disposed at the tip thereof so as to be disengaged from the protrusions, and a detector for detecting a sandwiched state is provided at a main portion, The part is mounted by being biased by a spring so as to engage with the detector, and is formed so as to be rotatable by a servomotor.