JPH06101709A - Fastening member - Google Patents

Abstract

PURPOSE:To provide a fastening member which can perform both of fastening work and releasing work easily and quickly. CONSTITUTION:A fastening member 1 is inserted into a hole 10 from its one projection part 2 side. Then, by reaction force, which acts on the outer circumference face of one side of the projection part 2, from the inner circumference face of the hole 10, one side of the projection part 2 and a rod body 4 are elastically deformed to be contracted in the radial direction so as to be inserted and fitted into the hole 10, and then one side of the projection part 2 is projected to the outside from the opening part of the hole 10 in one side of a plate body 8 and regains the original form, so that two plate bodies 8, 9 are fastened each other. To release fastening, the fastening member 1 is rotated in the predetermined direction (the direction moving in an arrow direction) using a hexagonal hole 6 in the other side of the projection part 3 so as to move to the arrow direction by screw action between a spiral groove 7 and the opening edge part of the hole 10, and one side of the projection part 2 and the rod body are elastically deformed to be contracted in the radial direction so that the fastening member 1 can be pulled out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening member for fastening a member to be fastened composed of at least two plate members.

[0002]

2. Description of the Related Art Conventionally, as a fastening member for fastening a member to be fastened composed of at least two plate-like members, there is a so-called snap fit, which will be described below.

FIG. 5 shows a conventional fastening method using a fastening member, (A) is a cross-sectional view of a main part showing a state of fastening the fastening member, and (B) is a cross-sectional view of a main part showing a completed fastening state. Is.

The conventional fastening member 21 has hemispherical projections 22 and 23 each having a cross-sectional dimension larger than the cross-sectional dimension of the rod-shaped body 24 at both ends of the rod-shaped body 24.
Slot 25 extending from 2 to the other protrusion 23
Is formed, and one of the protrusions 22 and the rod-shaped body 24 is elastically deformed in the radial direction and can be reduced. Figure 5
(A), the fastening member 21 is pushed in the direction of the arrow from one plate-shaped body 26 side into the hole 28 penetrating the two stacked plate-shaped bodies 26, 27 that are the members to be fastened. Then, the reaction force from the inner peripheral surface of the hole 28 that acts on the one protruding portion 22 elastically deforms the one protruding portion 22 and the rod-shaped body 24 to reduce the diameter in the radial direction, and is fitted into the hole 28, so that the one The projecting portion 22 projects outward from the opening of the other plate-shaped body 27 and returns to the original shape. As a result, one protrusion 22 of the fastening member 21 engages with the peripheral edge of the opening of the other plate 27, and the other protrusion 23 engages with the peripheral edge of the opening of the one plate 26. Then, the two plate-like bodies 26 and 27 are fastened.

[0005]

In the above-mentioned conventional technique, since the member to be fastened can be fastened only by pushing the fastening member into the hole at the time of fastening, compared with the fastening method using screws, bolts and nuts. The fastening work is easy. However, when disassembling the product for product recycling,
The following inconvenience occurs.

In order to release the fastening without damaging the plate-like body which is the fastening member or the member to be fastened, it is necessary to reduce one of the projecting portions formed with the slits in the radial direction and pull out from the hole. However, in general, there is a case where one of the projecting portions in which a slit is formed is present on the inner side of the product, which causes a problem in the work for releasing the fastening.

The present invention has been made in view of the above-mentioned problems of the prior art. Fastening and unfastening operations can be performed easily and quickly without damaging the fastening members or the fastened members. The purpose is to realize a member.

[0008]

In order to achieve the above object, the fastening member of the present invention has protrusions larger than the cross-sectional dimension of the rod at both ends of the rod, and one protrusion has a rod shape. A fastening member having a slit extending to the body, wherein a surface of one of the protrusions having the slit is opposed to the other protrusion is a conical surface, and a spiral is formed on the conical surface. It is characterized in that a groove is formed.

[0009]

The fastening member can be fastened by pushing the fastening member into the hole penetrating the fastened member from the one protruding portion side where the slit is formed. On the contrary, when releasing the fastening, rotate the other protruding part side with a rotating tool etc.,
The fastening member moves toward the other protruding portion side and is drawn into the hole by the screw action of the spiral groove and the opening edge portion of the hole that abuts against the spiral groove. As a result, the reaction force from the hole inner peripheral surface that acts on one of the protrusions elastically deforms one of the protrusions and the rod-shaped body to reduce the diameter in the radial direction, and the fastening member can be pulled out from the hole.

[0010]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a first embodiment, (A) is a longitudinal sectional view and (B) is a plan view.

In the fastening member 1 of this embodiment, one end portion of the rod-shaped body 4 has one substantially spherical protrusion 2 having a cross-sectional dimension larger than that of the rod-shaped body 4, and the other end portion. Has a columnar protruding portion 3 having a larger cross-sectional dimension than the rod-shaped body 4. In addition, the rod-shaped body 4 is projected from the one protruding portion 2.
A slot 5 extending in the direction is formed, and the surface on the rod-shaped body side that is the surface of the one protruding portion 2 facing the other protruding portion 3 is formed into a conical surface, and the spiral groove 7 is formed in the conical surface. Has been formed. Therefore, the rod-shaped body 4 is elastically deformable, and when one protrusion 2 is pressed from the direction in which the slot 5 is sandwiched, the rod-shaped body 4 is elastically deformed within the range in which the mutually opposing surfaces of the slot 5 come into contact with each other, and the rod 4 is sandwiched. When the pressure is released, it returns to its original shape.

Further, in this embodiment, a hexagonal hole 6 is formed on the surface of the other protruding portion 3 on the side opposite to the rod-shaped body.

Next, a method of fastening and unfastening using the fastening member of this embodiment will be described with reference to FIG.

In the case of fastening, as in the conventional example shown in FIG. 5, a hole for penetrating one projecting portion 2 in which the slit 5 is formed through two plate-like bodies 8 and 9 which are members to be fastened. Abut on the opening edge of 10, and then push in. Then, the reaction force from the inner peripheral surface of the hole 10 acting on the outer peripheral surface of the one protruding portion 2 reduces the gap between the one protruding portion 2 and the rod-shaped body 4 in the slot 5, that is, in the radial direction. It is contracted by elastic deformation and fitted into the hole 10, and the one protruding portion 2 projects outward from the opening portion of the hole 10 of the one plate-like body 8 and returns to the original shape. As a result, a part of the spiral groove 7 of the one protruding portion 2 of the fastening member 1 is locked to the opening peripheral portion of the hole 10 of the one plate-shaped body 8, and the other protruding portion 3 of the other plate. The two plate-like bodies 8 are engaged with the peripheral portions of the openings of the holes 10 of the body 9;
9 is concluded.

When the fastening is released, a wrench is engaged with the hexagonal hole 6 of the other protruding portion 3 and the fastening member 1 is rotated in a predetermined direction (direction of moving in the direction of the arrow). Engages with the peripheral edge of the opening, so that the protrusion 2 of one of the fastening members 1 moves in the direction of being drawn into the hole 10 by a screw action as if it were a screw. As a result, due to the reaction force from the inner peripheral surface of the hole 10 that acts on the one protruding portion 2,
One of the protrusions 2 and the rod-shaped body 4 is elastically deformed and contracted in the radial direction, and can be pulled out from the other protrusion 3 side.

Next, a second embodiment will be described.

As shown in FIGS. 3A and 3B, the fastening member 11 of this embodiment has a rod-shaped body 14 having the same shape as that of the first embodiment, one protrusion 12 and a slot 15. Mochi,
Since only the shape of the other protruding portion 13 is different, description of the same portion will be omitted and different portions will be described.

The other protruding portion 13 has a substantially hemispherical shape, and a groove 16 is formed at the top thereof so that the tip of a driver or the like can be fitted therein. Needless to say, this groove may have a cross shape.

The manufacturing cost of this embodiment is lower than that of the first embodiment because the processing is simple.

FIG. 4 is a sectional view of the main part showing a modified example of the fastening method using the fastening member of the second embodiment of the present invention. In this modification, the edge portion of the opening of the hole 20 of one plate-like body 18 is chamfered, and the chamfered surface is provided with the spiral groove 1 of the fastening member 11.
7 is formed with a spiral groove 18a that meshes with each other.

In this modified example, the engagement between the two spiral grooves 17 and 18a is good, so that the fastening can be released more easily.

In the present invention, the outer shape of the other projecting portion may be various shapes such as a polygonal column and an elliptic column other than the above-mentioned embodiments. Further, the slot is provided to elastically deform so as to be deformable in the radial direction, and the number thereof can be two or more depending on the material of the fastening member and the like.

[0024]

Since the present invention is configured as described above, it has the following effects.

Since the fastening and unfastening operations can be performed easily and quickly, and the fastening can be released without damaging the fastening members and the fastened members, the fastened members can be disassembled and reused.

[Brief description of drawings]

FIG. 1 shows a first embodiment of a fastening member of the present invention, (A)
Is a longitudinal sectional view, and (B) is a plan view.

2A and 2B show an example of a fastening and unfastening method using the fastening member shown in FIG. 1, in which FIG. 2A is a sectional view of a main part showing a state at the time of fastening, and FIG. FIG.

FIG. 3 shows a second embodiment of the fastening member of the present invention, (A)
Is a longitudinal sectional view, and (B) is a plan view.

4 is a cross-sectional view of main parts showing a modified example of the fastening method using the fastening member shown in FIG.

5A and 5B show a conventional fastening member and a fastening method using the same, in which FIG. 5A is a sectional view of a main part showing a state in the middle of fastening, and FIG. 5B is a sectional view of a main part showing a state of completion of fastening. is there.

[Explanation of symbols]

 1, 11 Fastening member 2, 12 One protruding part 3, 13 Other protruding part 4, 14 Rod-shaped body 5, 15 Slot 6 Hexagonal hole 7, 17 Helical groove 16 Groove 8, 18 One plate-shaped body 9, 19 The other plate-shaped body 10, 20 holes

Claims (2)

[Claims] 1. A fastening member having protrusions larger than the cross-sectional dimension of the rod-shaped body at both ends of the rod-shaped body and formed with slits extending from one of the protrusions to the rod-shaped body. A fastening member characterized in that a surface of one of the projecting portions formed with a split is opposed to the other projecting portion is a conical surface, and a spiral groove is formed in the conical surface. 2. The fastening member according to claim 1, wherein an engaging portion for engaging the rotary tool is formed on an outer surface of the other protruding portion.