JPS63201203U

JPS63201203U -

Info

Publication number: JPS63201203U
Application number: JP9277287U
Authority: JP
Priority date: 1987-06-18
Filing date: 1987-06-18
Publication date: 1988-12-26

Description

[Brief explanation of the drawing]

図面は本考案の一実施例を示し、第１図は縦断
正面図、第２図は第１図の−線断面図、第３
図は第１図の部分拡大図で、第４図は使用の一例
を示す折畳梯子の概略図、第５図は第４図の部分
拡大側面図である。１……ねじ孔、２……ナツト、３……ねじ山、
４……切欠凹部、５……膨出部、６，６′……支
杆、７……枢着点、８……スプリング、９……ボ
ルト、１０……角錐状部材。 The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional front view, Fig. 2 is a sectional view taken along the line - - of Fig. 1, and Fig.
The figure is a partially enlarged view of FIG. 1, FIG. 4 is a schematic diagram of a folding ladder showing an example of its use, and FIG. 5 is a partially enlarged side view of FIG. 4. 1...Screw hole, 2...Nut, 3...Screw thread,
4...Notch recess, 5...Bulging part, 6, 6'... Support rod, 7... Pivot point, 8... Spring, 9... Bolt, 10... Pyramidal member.

Claims

[Claims for Utility Model Registration] (1) In a nut 2 having a threaded hole 1 into which the threaded portion of the bolt can be screwed, the threads 3 in the upper part of the threaded hole 1 are spaced apart in the circumferential direction. A lock nut characterized in that a notch recess 4 and a continuous bulge 5 for preventing loosening are provided on the edge of the notch recess 4. (2) The cutout recess 4 is a V-shaped recess whose depth gradually decreases from one end of the screw hole 1 to the other end, and is provided in an area of 20 to 40% of the length of the screw hole 1. The locking nut described in claim (1) of the utility model registration, which is (3) A utility model in which the bulging portion 5 is a built-up protruding edge formed opposite both edges of the notch recess 4, and is elastically deformed when a bolt is screwed together. A locking nut as set forth in claim (1) or (2) of the registered claims.