JPS5919712A - Safety locking screw member - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION When tightening bolts and nuts, it is always difficult to prevent them from loosening.

Conventional methods include washers, crushing of plastic or rubber, forming spiral ribs (unevenness), adhesives, and various other methods, but although each method has achieved its purpose, it is still unavoidable to be dissatisfied. .

In particular, those that use adhesive or external force to prevent loosening are difficult to restore and finely adjust, and breakage occurs with damage to peaks and valleys. In addition, there are cases in which a slit Th is provided on the spiral, or a crest angle is made at a sharper angle than the other crest angle in order to elastically prevent loosening, but this leaves incomplete adhesion to the root and at the same time mechanically prevents the bold. In order to wipe out the weak points, the bold is attached to the other side (Nand) from the top of the screw thread to the root, all the way through the spiral.
In addition, strong adhesion (pressure) due to elastic restoring force can resist and prevent loosening. Also, there is no decrease in the performance of the bold due to repeated use in furnaces, fine adjustments, etc.Q Of course, there is also the worry of damage to the threads, etc., so do not use it.

This invention solves the above-mentioned problems by making maximum use of the entire d-flank surface (side surface) and departing from the conventional method.The manufacturing method is simple and can be easily and inexpensively rolled using the conventional rolling method. .

A similar result can be obtained by providing a curved surface like the bold on the reverse nine-nut side.

Figure 1 shows a bold spiral with a curved surface.
A is the top of the spiral mountain, and I3 is the HB portion approximately in the center of the mountain, which is bent at an acute angle of 60 degrees (50 degrees front and back) toward the top of the mountain to create a curved surface. Existing on the opposite side of Cil''iB, it forms an obtuse angle.

Figure 2 is a model diagram of crossing the mountain, where A in Figure 1 is a and B is l.
], C corresponds to C.

1 horsefly 21 years old

Claims (1)

[Claims] (The members are bolts and nuts. (2) A bolt is a screw thread formed in a spiral shape, and consists of a crest and a trough. A slightly curved surface is provided along the entire spiral and towards the top! (6) When this bold is connected to a normal Naratra, there is a curved surface in the spiral at the top of the bold mountain, so the bold mountain The parts elastically come into close contact with the side surfaces (flank faces) of each part of the nut over the entire helical surface, and the thread roots also come into complete contact with each other.