JPH07127610A - Positioning and fixing device - Google Patents

Abstract

PURPOSE:To provide a fixing device for member positioning which can be applied even to small members and whose precision is excellent and whose low cost can be realized. CONSTITUTION:The device is made up of a member having a positioning projection 4 and a coupling female screw 5; a member 2 having a positioning hole 6 to be put on the positioning projection 4 and a penetration hole 7 into which a coupling screw 3 is to be penetrated; and the coupling screw 3, and by constitution in which differentiation is brought on between an interval of the member positioning projection 4 and the coupling female screw 5 and an interval of the member 2 positioning hole 6 and the penetration hole 7, the positions of the two members are decided and fixed, so even if the members are miniaturized, positioning fixation can be realized easily and with precision and inexpensively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning and fixing device for members used in assembling various devices.

[0002]

2. Description of the Related Art In recent years, there have been remarkable achievements in downsizing and cost reduction of equipment, but in the assembly thereof, in order to accurately position and fix the members, it is necessary to separate the positioning part and the fixing part. It is always.

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

The members 11 and 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 into the 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 constructed as described above will be described below. The member 11 and the member 12 are positioned by fitting the positioning protrusions 15 into the positioning holes 16.
Then, the fastening screw 13 is passed through the through hole 17 of the member 12 and fastened to the fastening female screw 14 of the member 11, whereby the member 11 and the member 12 are fixed.

[0006]

However, in the above structure, one member requires two or more positioning holes and the other member requires two or more positioning projections. In addition to these, one or more fixing holes are required. You need a hole. That is, one member must be provided with three or more holes, and the other member must be provided with two or more positioning protrusions and one or more holes. However, due to the downsizing of equipment, the members are also downsized, and when positioning and fixing these downsized members, as described above, three or more holes are provided for one member and two holes for the other member. It was not easy in terms of space to provide more than one positioning protrusion and more than one hole. In addition, in order to improve the positioning accuracy of the members, it is necessary to improve the dimensional accuracy of the positioning protrusion and the positioning hole and the accuracy of the distance between them, but it is necessary to consider workability during assembly and dimensional variation. However, a small gap has to be provided in the design, and there has been a limit in improving the positioning accuracy. Further, when these members are subjected to sheet metal press working, a large number of positions for fixing and fixing such as protrusions and holes, which are different press strokes, are required. Therefore, if the mold is used, the number of molds will increase. However, there is a problem that the cost becomes high.

[0007]

In order to solve the above-mentioned problems, a positioning and fixing device of the present invention comprises a first member having a positioning protrusion and a female screw for fastening, and a positioning hole to be fitted with the positioning protrusion. A second member having a through hole through which a fastening screw penetrates and the fastening screw, and a gap between the positioning protrusion and the female screw for fastening in the first member, and the positioning hole in the second member. And the above-mentioned through holes have different intervals.

[0008]

With the above structure, the distance between the positioning protrusion and the fastening internal screw of the member having the positioning protrusion and the fastening internal screw is
The outer diameter of the positioning projection and the inner diameter of the positioning hole can be adjusted by slightly increasing or decreasing the distance between the pair of holes of the member having the positioning hole that fits with the positioning projection and the through hole through which the fastening screw passes. Since the space and the outer diameter of the fastening screw and the inner diameter of the through hole are respectively stretched, the two members are positioned and fixed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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, and 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 are stretched. It is a figure. In FIG.
The member 1 is provided with a positioning protrusion 4 and a fastening female screw 5, and the distance between the positioning protrusion 4 and the fastening female screw 5 is L. The member 2 is provided with a positioning hole 6 that fits 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 distance L is slightly longer than the distance M. The positioning protrusion 6 of the member 1 is fitted into the positioning hole 6 of the member 2, and the fastening screw 3 is passed through the through hole 7 to tighten the female screw 5 for fastening the member 1.
2, the outer diameter portion 4a of the positioning protrusion 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 due to the difference between the distance L and the distance M.
The outer diameter portion 3a of the member 1 contacts, that is, the positioning protrusion 4 and the fastening screw 3 of the member 1 are in a tensioned state with respect to the positioning hole 6 and the through hole 7 of the member 2, so that the member 1 and the member 2 are positioned, Fixed.

In this embodiment, since the fastening screw 3 is used, the fastening female screw 5 is threaded.
By using the tapping screw, the fastening female screw 5 of the member 1 can be formed as a through hole.
The threading process of 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, and even if the positioning protrusion 4 and the positioning hole 6 are provided in opposite members, the function is not improved. It is equivalent, and even if the fastening female screw 5 and the through hole 7 are provided in opposite members, respectively, the fastening direction of the fastening screw 3 only changes. Further, the present positioning and fixing device can be applied not only to metal members such as sheet metal presses but also to resin members.

[0012]

As described above, according to the present invention, the gap between the positioning protrusion and the fastening female screw of the member having the positioning protrusion and the female screw for fastening, the positioning hole for fitting the positioning protrusion, 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 positions of the two members are determined and fixed, so that it is easy even if the members are downsized,
Positioning and fixing can be performed accurately and inexpensively.

[Brief description of 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 a positioning and fixing device according to an embodiment of the present invention are stretched.

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

[Explanation of symbols]

1 Member with Positioning and Fixing Device of this Embodiment 2 Member with Positioning and Fixing Device of This Embodiment 3 Fastening Screw 3a External Diameter of Fastening Screw 4 Positioning Protrusion 4a Provided on Member 1 Provided on Member 1 Outer diameter portion of positioning protrusion 5 Female screw for fastening provided on member 1 Positioning hole 6a provided on member 2 Inner diameter portion of positioning hole provided on member 2 Through hole 7a provided on member 2 Member 2 Inner diameter portion of through hole provided in 11 Member having conventional positioning and fixing device 12 Member having conventional positioning and fixing device 13 Fastening screw 14 Female screw for fastening 15 provided in member 11 Provided in member 11 Positioning protrusion 16 Positioning hole provided in the member 12 17 Through hole provided in the member L Distance between the positioning protrusion provided in the member 1 and the female screw for fastening M Provided in the member 2 Interval of the positioning holes and through holes were

Claims (1)

[Claims] 1. A first member having a positioning protrusion and a female screw for fastening, a second member having a positioning hole for fitting with the positioning protrusion and a through hole through which the fastening screw penetrates, and the fastening screw. A positioning and fixing device in which a distance between the positioning protrusion and the fastening female screw in the first member and a distance between the positioning hole and the through hole in the second member are different from each other.