JPH0359512U

JPH0359512U -

Info

Publication number: JPH0359512U
Application number: JP12002489U
Authority: JP
Priority date: 1989-10-12
Filing date: 1989-10-12
Publication date: 1991-06-12
Anticipated expiration: 2004-10-12
Also published as: JPH0716094Y2

Description

[Brief explanation of drawings]

第１図〜第３図は本考案の第１実施例を示し、
そのうち、第１図は第１のワツシヤの斜視図、第
２図は第２のワツシヤの斜視図、第３図はそれの
組合せ状態の縦断側面図、第４図ａ，ｂ，ｃは本
考案の共回り防止作用の説明用平面図、第５図は
第１のワツシヤの他の実施例を示す斜視図、第６
図は第１のワツシヤの更に別の実施例を示す平面
図、第７図は第１のワツシヤの他の実施例を示す
平面図、第８図はその−線断面図、第９図は
第２のワツシヤの他の実施例を示す斜視図、第１
０図は本考案の第２実施例の組合せ状態を示す縦
断側面図、第１１図は第２のワツシヤの更に別の
実施例を示す平面図、第１２図はその−
線断面図、第１３図は本考案の第３実施例を示す
ボルトの斜視図、第１４図は本考案の第３実施例
の組合せ状態を示す縦断側面図、第１５図は本考
案の第４実施例を示す縦断側面図である。１……第１のワツシヤ、２……第２のワツシヤ
、１ａ……係合部、２ａ……係合部、３……ボル
ト、４……ナツト、５，６……被締結部材、７…
…円形孔、８……環状凹溝、Ａ，Ｂ，Ｃ……凸部
、Ｄ，Ｄ′……ボルト胴部と円形孔との接触点。 1 to 3 show a first embodiment of the present invention,
Of these, Fig. 1 is a perspective view of the first washer, Fig. 2 is a perspective view of the second washer, Fig. 3 is a longitudinal cross-sectional side view of the assembled state, and Fig. 4 a, b, and c are views of the present invention. FIG. 5 is a perspective view showing another embodiment of the first washer, and FIG.
The figure is a plan view showing still another embodiment of the first washer, FIG. 7 is a plan view showing another embodiment of the first washer, FIG. A perspective view showing another embodiment of the washers No. 2, 1st
Fig. 0 is a vertical sectional side view showing a combined state of the second embodiment of the present invention, Fig. 11 is a plan view showing still another embodiment of the second washer, and Fig. 12 is a side view thereof.
13 is a perspective view of a bolt showing the third embodiment of the present invention, FIG. 14 is a longitudinal sectional side view showing the assembled state of the third embodiment of the present invention, and FIG. 15 is a perspective view of a bolt showing the third embodiment of the present invention. It is a longitudinal side view which shows a 4th Example. DESCRIPTION OF SYMBOLS 1... First washer, 2... Second washer, 1a... Engaging part, 2a... Engaging part, 3... Bolt, 4... Nut, 5, 6... Fastened member, 7 …
...Circular hole, 8...Annular groove, A, B, C...Protrusion, D, D'...Contact point between the bolt body and the circular hole.

Claims

[Scope of Claim for Utility Model Registration] (1) Having an engaging part for the head of a bolt or nut on the top surface, and inserting into the gap between the circular hole of the fastened member and the bolt body at two places on the inner circumference. a first washer having a convex portion inserted into the gap between the circular hole of the member to be fastened and the bolt barrel at one location on the inner periphery; A co-rotation prevention device for bolts, characterized in that the convex portions of the first washer are positioned between the convex portions of the first washer and used in combination. (2) The first washer and the second washer are integrated by being loosely engaged with each other so as to be relatively rotatable by the engaging portion on the outer periphery. A device to prevent bolts from rotating together. (3) A bolt with protrusions formed at two locations in the circumferential direction to be inserted into the gap between the circular hole of the fastened member and the bolt body, and a bolt that is inserted into the gap between the circular hole of the fastened member and the bolt body at one location on the inner circumference. 1. An apparatus for preventing co-rotation of bolts, characterized in that the washer is used by positioning the convex part of the washer between the convex parts of the bolt. (4) In cases where there is almost no gap between the bolt body and the circular hole in the fastened member, one annular groove concentric with the bolt is provided near the head of the bolt body, and the inside of this annular groove is 3. The device for preventing co-rotation of bolts according to claim 1, wherein the device is used by inserting the convex portion of the second washer between the convex portions of the first washer.