JPH09100915A - Elastic packing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide elastic packing that can be mass-produced without the generation of fall from a fastener member in fastening. SOLUTION: A through hole 13 for a shank of a fastener member is formed in a packing body 12, made of elastic material, in such a way as to pierce from the surface to the back face. A plurality of protrusions 14 are provided at the inner periphery of the through hole 13. Because of a space secured between the protrusions 14, the elastic packing 11 is extended inward at the time of fastening the fastener member so as to eliminate the generation of fall from the fastener member, and the elastic packing 11 can be manufactured by punching using a press.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic packing for waterproofing, earthquake-proofing, etc., which is used by inserting it under the head of a fastener member when fastening various members with fastener members such as nails and screws. The present invention relates to a combination of the elastic packing and the fastener member.

[0002]

2. Description of the Related Art When various members are fastened with fastener members such as nails and screws, elastic packing is used for the purpose of waterproofing and earthquake-proofing the fastening portions.

A conventional elastic packing is shown in FIG.
As shown in (A) and (B), the insertion hole 3 of the shaft portion 2 of the fastener member 1 penetrates from the front surface to the back surface, and the elastic packing 4 formed in a disk shape having an inner and outer diameter is circular, and FIG. As described above, there is known the elastic packing 4a in which the thin wall portion 5 is provided around the inner periphery of the insertion hole 3.

[0004]

By the way, in the case of the former elastic packing 4, the inner diameter of the insertion hole 3 is the fastener member 1.
When the outer diameter of the shaft portion 2 is larger than the outer diameter of the shaft portion 2, when the head portion 6 of the fastener member 1 and the attachment 7 are compressed, as shown in FIG. 3B,
There is a problem that the elastic packing 4 extends outward due to compression, the periphery thereof protrudes from the head 6, and finally falls off from the fastener member 1.

If the insertion hole 3 is smaller than the diameter of the shaft portion of the fastener member 1, the inward extension due to compression clamps the shaft portion 2 so that it does not fall off immediately, but the fastener member 1 is strongly fastened. In such a case, since the inward extension is restricted, the outward extension is increased by being crushed, and the periphery is enlarged larger than the head portion 6 of the fastener member 1 and comes out of the head portion 6. There is.

On the other hand, the latter elastic packing 4a is
Since the thin wall portion 5 having an inner diameter smaller than the shaft portion diameter is provided on the inner circumference of the insertion hole 3, the thin wall portion 5 prevents the thin wall portion 5 from falling off from the fastener member 1, and when it is strongly compressed, There is an advantage that a space that allows the outward expansion can be secured, and the occurrence of the escape due to the excessive outward expansion can be prevented.

However, since the elastic packing 4a is made of an elastic synthetic resin or the like, the thin thick portion 5 is used.
The structure having a must be manufactured by means of injection molding using a mold, which is not suitable for mass production, and there is a problem that manufacturing cost and equipment cost are high.

Therefore, an object of the present invention is to provide an elastic packing that can be mass-produced by pressing and does not fall off when fastening a fastener member.

[0009]

In order to solve the above problems, the invention of claim 1 is characterized in that the packing body is formed with an insertion hole of a fastener member so as to penetrate from the front surface to the back surface.
A configuration is adopted in which a plurality of projections that are continuous from the front surface to the back surface are provided in the inner circumference of the insertion hole in the penetration direction of the insertion hole.

According to a second aspect of the present invention, there is provided a fastener member having a head portion at one end of the shaft portion and an elastic packing having a through hole for the shaft portion of the fastener member in the packing body, and the through hole of the packing body is a fastener. A plurality of projections are formed that are larger than the diameter of the shaft below the head of the member, and that are continuous from the front surface to the back surface in the penetration direction of the insertion hole, and a virtual circle connecting the tops of these projections. The diameter is set smaller than the diameter of the shaft portion under the head of the fastener member, and the elastic packing is attached to the shaft portion of the fastener member.

Here, the packing body is made of a synthetic resin having elasticity and is formed in a disk shape having an insertion hole and an outer diameter of a concentric circle. The protrusion provided on the inner circumference of the insertion hole is
They are arranged at equal intervals in the circumferential direction.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the illustrated examples shown in FIGS.

As shown in FIGS. 1 and 2, the elastic packing 1
In the packing body 12 made of elastic synthetic resin or the like, an insertion hole 13 of the shaft portion 2 of the fastener member 1 is formed so as to penetrate from the front surface to the back surface, and the insertion hole 13 is formed on the inner periphery of the insertion hole 13. It has a structure in which a plurality of protrusions 14 continuous from the front surface to the back surface are provided in the penetration direction of.

The packing body 12 has an outer diameter and an insertion hole 1.
3 is formed in a circular disk shape that is coaxially centered, and has an insertion hole 13
Is set to be slightly larger than the outer diameter of the shaft portion 2 below the head portion 6 of the fastener member 1, and the protrusion 14 projects inward in a substantially semicircular shape, U-shape, V-shape, etc. Two or more, preferably three or more, are provided at equal intervals in the circumferential direction of 13 and an imaginary circle a connecting the tops of these protrusions 14 is provided.
Is smaller than the diameter of the shaft portion under the head of the fastener member 1 or smaller than the twist diameter of the shaft portion 2.

As described above, since the elastic packing 11 has the same thickness as the packing body 12 and the projections 14 provided on the inner circumference of the insertion hole 13, it can be manufactured by punching with a press, and the cost can be reduced by mass production. Can be achieved.

The elastic packing of the present invention is constructed as described above, and by inserting the shaft portion 2 of the fastener member 1 into the insertion hole 13, the head portion 6 of the shaft member 2 of the fastener member 1 is inserted.
The elastic packing 11 is attached to the lower position of the combination.

Here, the diameter of the insertion hole 13 of the elastic packing 11, the projection amount of the protrusion 14, the thickness of the packing body 12 and the like may be set in accordance with the conditions of the fastener member 1 used in combination, and the packing body is also used. The outer diameter of 12 may be set to be equal to or smaller than the outer diameter of the head 6.

When the fastener member 1 with the elastic packing 11 is used and the fastener member 1 is screwed into the structure 8 or the like to fix the attachment 7, the structure shown in FIG.
As described above, the elastic packing 11 contacts the surface of the attachment 7.

When the fastener member 1 is further screwed in, the elastic packing 11 is compressed between the head portion 6 of the fastener member 1 and the attachment 7. At this time, the elastic packing 11 tries to extend into the free space.

In addition to the free space in the outer peripheral direction, the elastic packing 11 can secure a free space between the adjacent projections 14 which circumscribe the shaft portion 2 in a compressed state, and therefore, the compressed packing main body 12 is , Both inside and outside, and without being excessively pushed outward, as shown in FIG. 2B, when the fastener member 1 is completely tightened, the compressed elastic packing 11 is It fits within the outer diameter, does not fall off from the fastener member 1, and fulfills the waterproof and earthquake-proof functions of the fastening portion.

If three or more protrusions 14 are provided so as to have the same protrusion amount, the elastic packing 1 is attached to the shaft portion 2.
1 can be mounted coaxially, and it is possible to prevent the problem that the elastic packing 11 is biased at the time of fastening and the outer periphery protrudes from the head.

Further, since the protrusion 14 is partially provided on the inner periphery of the insertion hole 13, when the shaft portion 2 of the fastener member 1 is inserted into the insertion hole 13, this shaft portion has a large number of threads. Even in the case, it can be easily inserted.

Further, although the fastener member 1 is exemplified by the bolt in the illustrated case, it may be a nail.

[0024]

As described above, according to the present invention, an elastic packing that does not fall off from the fastener member when fastening the fastener member can be manufactured by punching with a press, and the elastic packing that does not fall off can be mass-produced. It is possible to provide an elastic packing which is inexpensive in cost.

Further, the combination of the elastic packing and the fastener member ensures that waterproofness and earthquake resistance can be obtained at the time of fastening.

[Brief description of the drawings]

FIG. 1A is a perspective view of an elastic packing, and FIG. 1B is a plan view of the same.

FIG. 2A is a vertical cross-sectional view showing a fastening series state of a combination body, and FIG. 2B is a vertical cross-sectional view showing a fastening completion state.

FIG. 3A is a perspective view showing a conventional elastic packing,
(B) is a longitudinal sectional view showing a fastening state of a combination body using the same as above.

FIG. 4 is a sectional view showing another example of a conventional elastic packing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fastener member 2 Shaft part 6 Head part 11 Elastic packing 12 Packing main body 13 Insertion hole 14 Protrusion

Claims (2)

[Claims] 1. A packing main body is formed with an insertion hole of a fastener member so as to penetrate from the front surface to the back surface, and a plurality of projections continuous from the front surface to the back surface in the penetration direction of the insertion hole are provided on the inner periphery of the insertion hole. Elastic packing. 2. A fastener member having a head portion at one end of a shaft portion, and an elastic packing having a through hole for the shaft portion of the fastener member in a packing body, wherein the through hole of the packing body is under the head portion of the fastener member. Is formed to have a diameter larger than the shaft portion diameter, and a plurality of projections that are continuous from the front surface to the back surface in the penetration direction of the insertion hole are provided on the inner circumference of the insertion hole, and the diameter of a virtual circle connecting the tops of these projections is Is smaller than the diameter of the shaft under the head of the fastener, and the elastic packing is attached to the shaft of the fastener member to form a combination of the fastener and the elastic packing.