JPH0319606Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to the attachment and detachment of a fastening member and a member to be fastened, and particularly to a fastening device that can be easily removed when the fastening member is removed.

(Prior art) Generally, the method of fastening the fastened member and the fastened member is as follows:
Fastening parts such as screws, stop rings, and spring pins are used for fastening, and tools suitable for the fastening parts are used for fastening.

(Problems with the prior art) However, in the conventional fastening method described above, processing is required for both the fastened member and the fastened member, and furthermore, the fastening parts and special tools are required. This increases costs, requires work such as fixing the fastening parts when fastening, and is difficult to remove after fastening except for fastening methods that use screws. However, there is a problem or drawback that the work is time-consuming.

(Means for Solving the Problems) The present invention is aimed at solving the above-mentioned problems and drawbacks, and as shown in FIG. An insertion hole 1d is provided for inserting the insertion hole 1d.
By providing a pair of cut teeth 1a on the inner periphery of d at positions facing each other, and providing a withdrawal hole 1b on the outer periphery thereof for use in removal and an escape groove 1c at a position substantially orthogonal to the withdrawal hole 1b. , is characterized in that the fastening member 2 can be easily attached and detached.

(Example) An example of the present invention will be described below in detail based on the drawings. However, if the symbols in each drawing have the same function and form, the same symbols as those in Figure 1 will be used.
Different forms with the same function are distinguished by adding a dash to the one in Figure 1.

As shown in FIG. 1, the fastened member 1 is formed with an insertion hole 1d into which the fastening portion 2a of the fastening member 2 to be fastened to the fastened member 1 can be inserted, and the inner circumference of the through hole 1d is A pair of cutting teeth 1a are formed at positions facing each other, and an insertion hole 1 of the cutting teeth 1a is further formed.
A recessed groove 1c is formed on the outer periphery of the cutting tooth 1a, and a detachment hole 1b used for removal is provided near the outer periphery of the insertion hole 1d which is substantially perpendicular to the cutting tooth 1a. At this time, the interval between the cutting teeth 1a is set slightly narrower than the size of the fastening portion 2a. Also, cutting tooth 1a
As shown in FIG. 2, the fastening portion 2a may be bent in the opposite direction to the insertion side. This has the advantage that the fastening portion 2a can be easily inserted. When fastening facing each other,
As shown in FIG. 3, the fastening portion 2a of the fastening member 2 is
Insert into the insertion hole 1d of the member 1 to be fastened. Then, the cutting teeth 1a are pushed in the insertion direction and come to bite the outer periphery of the fastening portion 2a, so that the fastening portion 2a is firmly fastened. or,
Since the interval between the cutting teeth 1a of the fastener is formed to be slightly narrower than the size of the fastening part 2a, the cutting teeth 1a will bite into the outer periphery of the fastening part 2a even if tension is applied in the opposite direction to the insertion direction. It won't come off.

Furthermore, for removal, use a general commercially available tool (such as radio pliers) in the removal hole shown in Figure 1.
Apply force in the direction of arrow A shown in FIG. Then, the relief groove 1c provided on the outer periphery of the insertion hole 1d of the cutting tooth 1a is deformed due to the applied force, and the cutting tooth 1
As shown in FIG.
The interval between the cutting teeth 1a is wider than the size of the fastening portion 2a, and the fastening portion 2a can be easily removed.

In the above-described embodiment, the cutting teeth 1a are bent, but as shown in FIG. 5, the same effect as described above can be obtained even if the cutting teeth 1a' are not bent.

Furthermore, this fastening device can be applied even when the fastening portion 2a has various shapes such as cylindrical, rectangular, and polygonal.

(Effects of the invention) As described above, according to the invention, when fastening a fastened member and a fastening member, the insertion hole through which the fastening portion of the fastening member can be inserted into the fastened member and the inner periphery of the insertion hole face each other. The fastening part is provided with a protruding cut tooth, an escape groove formed around the cut tooth, and a breakaway hole drilled in a direction substantially perpendicular to the cut tooth and near the outer periphery of the insertion hole. All you have to do is insert the Only the fastening member needs to be processed, and this can be done simultaneously using a mold, which is effective in reducing costs.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, and is a perspective view showing the relationship between a fastened member 1 and a fastened member 2;
The figures are a front view and a sectional view showing the structure of the fastened member, FIGS. 3 and 4 are partial sectional views showing the fastened state and the removed state, and FIG. 5 is a fastened member that is another embodiment of the present invention. FIG. 2 is a front view and a sectional view showing the structure of the member. 1... member to be fastened, 1a... cut tooth, 1b...
...Separation hole, 1c...Escape groove, 1d...Insertion hole, 2
... Fastening member, 2a ... Fastening portion.

Claims (1)

[Scope of utility model registration request] an insertion hole into which a fastening portion of a fastening member to be fastened to a fastened member can be inserted; a pair of cut teeth protruding from opposing positions on an inner circumference of the insertion hole;
an escape groove formed around the insertion hole of the cutting tooth;
A fastening device characterized by comprising a withdrawal hole bored in a direction substantially perpendicular to the cutting teeth and near the outer periphery of the insertion hole.