JPS6234744A - Chucking device for precision parts - Google Patents

Abstract

PURPOSE:To position and secure a precision part with high accuracy and reproduction by securing the precision part with a screw through a rotary force absorbing board to be guided through slide pins thereby absorbing the rotary force of screw. CONSTITUTION:A precision part 5 mounted on a work stage 1 is positioned through a pushing pin 3 toward the securing/positioning pins 2, 2 the a screw 15 is turned to lower said part 5 and a rotary force absorbing board 11 is lowered along the slide pins 6... while compressing the coil springs 8... to push the precise part 5 toward the work stage 1 at the projection 11a in the center of underface. Since the rotary force absorbing board 11 is guided elevatably but not rotatably by means of the slide pins 6..., the rotary force of the screw 15 is not transmitted to said board 11 which will move only in up/down direction. Consequently, when securing the precision part 5 by means of the screw 15, it can be positioned/secured with high accuracy and reproduction without rotating.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a chucking device for precision parts used for processing and measurement requiring fine positioning accuracy.

<Summary of the Invention> The present invention absorbs the rotational force of the screw by fixing the precision part with a screw through a rotational force absorption plate guided by a slide pin, thereby making it possible to fix the precision part with high precision and good reproducibility. It is designed to be positioned and fixed.

<Prior Art> In conventional precision component chucking devices, the position of the precision component is optically detected using a microscope, and the precision component is directly fixed with a fixing screw to perform positioning and fixation.

<Problems to be Solved by the Invention> However, in the above-mentioned conventional chucking device, the precision parts are directly fixed with the fixing screws, so when the fixing screws are tightened, the precision parts are slightly moved in the same direction as the fixing screws. rotation, causing variations in the positioning accuracy of precision parts. Therefore, when fixing precision parts, it is necessary to shift the precision parts slightly and fix them, which poses a problem in that it takes a lot of time to position and fix the precision parts.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a chucking device for precision parts that has a simple structure and can absorb the rotational force of a screw and position and fix precision parts with high accuracy and reproducibility. .

Means for Solving the Problems In order to achieve the above object, the precision parts chucking device of the present invention includes a fixed positioning pin installed upright on a work stage and a precision part placed on the work stage. The movable pressing unit that presses against the fixed positioning pin includes a pin, a slide pin provided upright on the work stage, a rotational force absorption plate that is guided by the slide pin so as to be movable up and down but not rotatable, and the rotational force absorption plate. It is characterized by having a screw that presses the plate against the precision part.

<Example> Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

As shown in FIGS. 1 and 2, fixed positioning pins 2.degree. 2 are erected and fixed to the work stage 2 at regular intervals from each other. The above work stage! A long hole 1a is provided in the hole 1a, and a pressing pin 3 is movably provided in the long hole.
and press it against the fixed positioning pin 2.2.

Also, slide pins 6 are attached to the four corners of the work stage 1.
6.6.6 is erected and fixed. Slide bushes 7.7, 7 are slidably provided on the slide pins 6.6, 6.6, respectively, and a rotational force absorbing plate 11 is fixed to the slide bushes. A compression coil spring 8 is compressed between the slide bush 7 and the work stage 1. A protrusion 11a is provided at the bottom of the rotational force absorption itt.
is formed so that the workpiece 5 can be pressed toward the workpiece stage l by this protrusion 11a. The tip of a fixing screw 15 screwed into the support plate 12 is rotatably fitted into the recess 11b provided at the center of the upper surface of the rotational force absorbing plate 11.

In the above configuration, the precision part 5 placed on the work stage 1 is pressed against the fixed positioning pin 2.2 and positioned by pressing it with the pin 3, and then the screw 15 is turned to lower it. The absorption plate 11 is a coil spring 8.8. ... while compressing the slide pin 6.6.・
The precision part 5 is guided down by the slide bushes 7°7, .

When the screw 15 descends while turning in this way, the rotational force absorbing plate 11 is also pressed by the screw 15 and lowered.
Since the rotational force absorbing plate 11 is guided by the slide pins 6°6, . moves only in the vertical direction. However, I bowed,
When fixing the precision component 5 with the screw 15 via the rotational force absorbing plate II, the precision component 5 is rotated as in the conventional manner.
The precision component 5 can be positioned and fixed with high precision and with the same precision repeatedly, that is, with high reproducibility.

In the above embodiment, the work stage l and the slide bush 7
I compressed the coil spring 8 between the screws! 5
When the rotating force absorbing plate 11 is raised, the rotational force absorbing plate 11 is automatically raised, and the precision component 5 can be released.

In the embodiment described above, the tip of the screw 15 is simply fitted into the recess 11b on the upper surface of the rotational force absorbing plate 11 in a detachable and rotatable manner, but the method of coupling the screw 15 and the rotational force absorbing plate 11 is a rotatable and rotatable method. It may be of a structure that cannot be detached at will.

<Effects of the Invention> As is clear from the above, according to the present invention, the fixed positioning pin and pressing can move the precision parts positioned by the pin,
Since it is fixed to the work stage with screws via a rotational force absorbing plate that is guided by a slide pin so that it can be raised and lowered but not rotated, precision parts can be positioned with high accuracy and repeatability with a simple component configuration. can be fixed,
Very useful and large effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of one embodiment of the precision parts chucking device of the present invention, and FIG. 2 is a cross-sectional view taken along the line ■--■ in FIG. ■...Work stage, 2...Fixed positioning pin,
3...Press pin, 5...Precision parts, 6...Slide pin, 11...Rotational force absorption plate, 15...Screw. Patent applicant: Sharp Corporation Agent
Patent attorney Aohaku Ao and 2 others Figure 1 FI No. 2111

Claims (1)

[Claims] (1) A fixed positioning pin erected on the work stage; A movable pressing pin that presses the precision component placed on the work stage toward the fixed locating pin; A slide pin erected on the work stage; A chucking device for precision parts, comprising: a rotational force absorbing plate that is guided by a slide pin so as to be movable up and down but not rotatable; and a screw that presses the rotational force absorption plate toward the precision part.