JP3341406B2 - Positioning and fixing device - 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 and fixing members used for assembling all kinds of equipment.

[0002]

2. Description of the Related Art In recent years, there has been a remarkable reduction in size and cost of equipment. In assembling the equipment, it is necessary to separate a positioning part from a fixing part in order to accurately position and fix members. Always.

Hereinafter, the above-described conventional positioning and fixing device will be described with reference to the drawings. FIG. 3 is a sectional view of a conventional general positioning and fixing device.

A member 11 and a member 12 are fixed by fastening screws 13. The fastening female screw 14 is provided on the member 11 and is fastened to the fastening screw 13. The positioning protrusion 15 is provided on the member 11 and fits with a positioning hole 16 provided on the member 12. The through hole 17 is provided in the member 12, and the fastening screw 13 penetrates and is fastened to the fastening female screw 14.

The positioning and fixing method of the conventional positioning and fixing device configured as described above will be described below. The members 11 and 12 are positioned by fitting the positioning protrusions 15 into the positioning holes 16.
Then, the member 11 and the member 12 are fixed by passing the fastening screw 13 through the through hole 17 of the member 12 and fastening to the female screw 14 for fastening of the member 11.

[0006]

However, in the above arrangement, two or more positioning holes are required for one member and two or more positioning protrusions are required for the other member. Holes are required. That is, one member must have three or more holes, and the other member has two or more positioning protrusions and one or more holes. However, the members have also been reduced in size due to the downsizing of the equipment, and when positioning and fixing these downsized members, as described above, three or more holes for one member and two or more holes for the other member. It was not easy in terms of space to provide more than one positioning projection and one or more holes. Also, in order to increase the positioning accuracy between members, it is necessary to improve the dimensional accuracy of the positioning protrusion and the positioning hole and the accuracy of their spacing. However, it is necessary to consider the workability and dimensional variation during assembly. In addition, a small gap must be provided in the design, and there is a limit in improving the positioning accuracy. In addition, when these members are formed by sheet metal pressing, a large number of locations for positioning and fixing, such as projections and holes, which require different pressing steps, are required. However, there is a problem that the cost increases.

[0007]

In order to solve the above-mentioned problems, a positioning and fixing device according to the present invention comprises a first member having a positioning projection and a female screw for fastening, a positioning hole fitted with the positioning projection, and A second member having a through hole through which a fastening screw passes; and a spacing between the positioning projection and the fastening female screw in the first member, and a positioning hole in the second member. and it is obtained by construction in a state of taut to have a difference in intervals of the through hole.

[0008]

According to the above construction, the distance between the positioning projection and the female screw for fastening of the member having the positioning projection and the female screw for fastening is determined.
A member having a positioning hole to be fitted with the positioning protrusion and a through hole through which the fastening screw penetrates is slightly longer or shorter than the interval between the pair of holes, so that the outer diameter of the positioning protrusion and the inner diameter of the positioning hole are reduced. Since the gap and the gap between the outer diameter of the fastening screw and the inner diameter of the through hole are stretched, the two members are positioned and fixed.

[0009]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a positioning and fixing device according to an embodiment of the present invention. FIG. 2 is a plan view showing a positioning projection, positioning holes, through holes, and fastening screws of the positioning and fixing device. FIG. In FIG.
The member 1 is provided with a positioning projection 4 and a fastening internal thread 5, and the distance between the positioning projection 4 and the fastening internal thread 5 is L. The member 2 is provided with a positioning hole 6 fitted with the positioning protrusion 4 and a through hole 7 through which the fastening screw 3 passes.
The distance between the positioning hole 6 and the through hole 7 is M. The interval L is slightly longer than the interval M. The positioning hole 4 of the member 2 is fitted into the positioning protrusion 4 of the member 1, and the fastening screw 3 is inserted through the through hole 7 to thereby tighten the female screw 5 of the member 1.
2, the outer diameter portion 4a of the positioning projection 4 and the inner diameter portion 6a of the positioning hole 6 and the inner diameter portion 7a of the through hole 7 and the fastening screw 3 are formed as shown in FIG.
Since the outer diameter portion 3a of the member 1 comes into contact, that is, the positioning projection 4 and the fastening screw 3 of the member 1 are in a state of protruding against the positioning hole 6 and the through hole 7 of the member 2, the member 1 and the member 2 are positioned, Fixed.

In this embodiment, since the fastening screw 3 is used, the female screw 5 for fastening is threaded.
By using the tapping screw, the fastening female screw 5 of the member 1 can be formed as a through hole.
Can be omitted. Further, the combination of the positioning protrusion 4, the fastening female screw 5, the positioning hole 6, and the through hole 7 is not limited to the present embodiment. Even if the female screw 5 for fastening and the through hole 7 are provided in the opposite members, only the fastening direction of the fastening screw 3 is changed. The positioning and fixing device can be applied not only to a metal member such as a sheet metal press but also to a resin member.

[0012]

As described above, according to the present invention, the gap between the positioning projection and the fastening female screw of the member having the positioning projection and the fastening female screw, the positioning hole fitted with the positioning projection, and the fastening screw penetrate. By providing a difference in the distance between the pair of holes of the member having the through hole, the position of the two members is determined and fixed, so that even if the members are reduced in size, it is easy,
Positioning and fixing can be performed accurately and at low cost.

[Brief description of the drawings]

FIG. 1 is a sectional view of a positioning and fixing device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a state in which a positioning protrusion, a positioning hole, a through hole, and a fastening screw of the positioning and fixing device according to one embodiment of the present invention are stretched;

FIG. 3 is a sectional view of a conventional general positioning and fixing device.

[Explanation of symbols]

Reference Signs List 1 Member provided with positioning and fixing device of this embodiment 2 Member provided with positioning and fixing device of this embodiment 3 Fastening screw 3a Outer diameter portion of fastening screw 4 Positioning protrusion provided on member 1 4a Provided on member 1 Outer diameter portion of positioning protrusion 5 Female screw for fastening provided in member 1 6 Positioning hole 6a provided in member 2 Inner diameter portion of positioning hole provided in member 2 7 Through hole provided in member 2 7a Member 2 11 A member provided with a conventional positioning / fixing device 12 A member provided with a conventional positioning / fixing device 13 A fastening screw 14 A female screw for fastening provided on the member 11 15 A member provided on the member 11 Positioning protrusion 16 Positioning hole provided in member 12 17 Through hole provided in member 12 L Distance between positioning protrusion provided in member 1 and female screw for fastening M Provided in member 2 Interval of the positioning holes and through holes were

Claims (1)

(57) [Claims] 1. A first member having a positioning projection and a female screw for fastening, a second member having a positioning hole fitted with the positioning projection and a through hole through which the fastening screw passes, and the fastening screw. A positioning and fixing device in which the distance between the positioning projection and the female screw for fastening in the first member and the distance between the positioning hole and the through hole in the second member are different from each other and are in a state of being stretched .