JPH0351208U

JPH0351208U -

Info

Publication number: JPH0351208U
Application number: JP11189789U
Authority: JP
Priority date: 1989-09-25
Filing date: 1989-09-25
Publication date: 1991-05-17

Description

[Brief explanation of drawings]

第１図は本考案の回転防止機構付きボルトの一
実施例を示す側面図である。第２図は第１図の押
広部およびその近傍を拡大して示す縦断面図であ
る。第３図は第１被締結部材を受け台に配置した
状態を示す縦断面図である。第４図は本考案の回
転防止機構付きボルトを第１被締結部材の挿通孔
に挿入する状態を示す縦断面図である。第５図は
押広部が受け台の受け部により押し広げられる状
態を示す縦断面図である。第６図は押広部が第１
被締結部材に係止された状態を示す縦断面図であ
る。第７図は受け台の受け部およびその近傍を示
す縦断面図である。第８図は本考案の回転防止機
構付きボルトを使用して、第１被締結部材と第２
被締結部材とを締結した状態を示す縦断面図であ
る。第９図は従来の回転防止機構付きボルトを示
す側面図である。第１０図は第９図のＸ−Ｘ線に
沿う横断面図である。第１１図は第９図の回転防
止機構付きボルトを使用して、第１被締結部材と
第２被締結部材とを締結する状態を示す縦断面図
である。主要な部分の符号の説明、４１……頭部、４３
……脚部、４５……大径部、４７…突条、４９…
…螺子、５１……小径部、５３……テーパ部、５
５……第１被締結部材、５７……挿通孔、５９…
…押広部、６７……受け部。 FIG. 1 is a side view showing one embodiment of a bolt with a rotation prevention mechanism of the present invention. FIG. 2 is an enlarged vertical sectional view showing the push-out portion and its vicinity in FIG. 1. FIG. 3 is a longitudinal cross-sectional view showing a state in which the first fastened member is placed on a pedestal. FIG. 4 is a longitudinal sectional view showing the state in which the bolt with the anti-rotation mechanism of the present invention is inserted into the insertion hole of the first fastened member. FIG. 5 is a longitudinal cross-sectional view showing a state in which the spreading part is pushed out by the receiving part of the pedestal. In Figure 6, the push wide part is the first
FIG. 3 is a longitudinal cross-sectional view showing a state in which the member is locked to a member to be fastened. FIG. 7 is a longitudinal cross-sectional view showing the receiving portion of the pedestal and its vicinity. Figure 8 shows the first fastened member and the second fastened member using the rotation prevention mechanism bolt of the present invention.
FIG. 3 is a longitudinal cross-sectional view showing a state in which the member to be fastened is fastened. FIG. 9 is a side view showing a conventional bolt with a rotation prevention mechanism. FIG. 10 is a cross-sectional view taken along line X--X in FIG. 9. FIG. 11 is a longitudinal sectional view showing a state in which a first member to be fastened and a second member to be fastened are fastened using the bolt with the anti-rotation mechanism shown in FIG. 9. FIG. Explanation of symbols of main parts, 41...Head, 43
...Leg portion, 45...Large diameter portion, 47...Protrusion, 49...
...Screw, 51...Small diameter part, 53...Tapered part, 5
5...First fastened member, 57...Through hole, 59...
...Pushing part, 67...Receiving part.

Claims

[Scope of utility model registration request]

Consisting of a head and a leg, a large diameter part is formed on the head side of the leg, and the outer periphery thereof has a large number of protrusions along the axial direction of the leg, and the tip of the leg A small diameter part is formed on the outer periphery of the part with a screw into which the nut is screwed, and further, the large diameter part and the small diameter part are connected through a tapered part, and a part is formed between the head part and the nut. A plurality of members to be fastened are disposed in the first member to be fastened, and the tapered portion is protruded from a surface on the small diameter side of the first member to be fastened that comes into contact with the head, and the first member to be fastened is arranged in the receiving portion. In the bolt with a rotation prevention mechanism in which the large diameter portion of the leg is press-fitted into the insertion hole of the bolt, the bolt is pushed outward by the receiving portion and is locked to the surface of the first fastened member on the small diameter side. A bolt with an anti-rotation mechanism, characterized in that a widened part is formed in the tapered part.