JPS6359212U

JPS6359212U -

Info

Publication number: JPS6359212U
Application number: JP15333186U
Authority: JP
Priority date: 1986-10-06
Filing date: 1986-10-06
Publication date: 1988-04-20

Description

[Brief explanation of the drawing]

第１図はこの考案の実施例を示すねじの脱落防
止装置の断面図、第２図は同じく通し孔（楕円孔
）を示すための蓋の部分平面図、第３図は同じく
蓋と胴細ねじの係合を示す部分断面図、第４図は
従来のねじ脱落防止装置の断面図、第５図は別の
従来例を示すねじの脱落防止装置の断面図、第６
図は第５図における通し孔を示すための蓋の部分
平面図である。１……箱体（結合体）、３……蓋（被結合体）
、４……通し孔、６……胴細ねじ、１１……楕円
孔（通し孔）。 Fig. 1 is a sectional view of a screw fall prevention device showing an embodiment of this invention, Fig. 2 is a partial plan view of the lid showing the through hole (elliptical hole), and Fig. 3 is the same as the lid and the thin body. FIG. 4 is a sectional view of a conventional screw fall prevention device; FIG. 5 is a sectional view of another conventional screw fall prevention device; FIG.
The figure is a partial plan view of the lid to show the through holes in FIG. 5. 1... Box body (combined body), 3... Lid (bonded body)
, 4... Through hole, 6... Body thin screw, 11... Oval hole (through hole).

Claims

[Claims for Utility Model Registration] (1) A threaded member such as a bolt whose tip end passes through a through-hole in the joined body and is screwed into a threaded hole in the joined body when the joined body is separated, In a device for preventing a screw from falling off to be locked in a through hole, a thin body screw whose cylindrical portion has a smaller diameter than the diameter of the valley of the male thread is used for the screw member, and the through hole is
A device for preventing a screw from falling off, characterized in that it is formed into an oval shape with a small diameter slightly smaller than the outer diameter of the male thread of the thin body screw. (2) Utility Model Registration Scope of Claim 1. The screw fall prevention device according to claim 1, wherein the connected body is made of plastic.