JP2002039139A - Bolt having locking mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bolt that does not easily loosen as it is even when screwing is stopped at any position during screwing and is optimal to a level adjuster used for a table, although a bolt has a mechanism in which it does not easily loosen by fastening and thus a double nut is used for fixing it during fastening, but fastening operation of the double nut is complicated. SOLUTION: In this bolt having a locking mechanism, a groove 3 is provided over the entire length of a screw part 2 of the strong bolt 1 made of steel or the like, a filler 4 having high elasticity and coefficient of friction such as rubber is inserted into the groove 3, the filler 4 has a diameter slightly larger than root diameter of the screw part 2 and contact with a screw thread 6 of a counter female screw 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can be applied to commonly used bolts, and particularly relates to a level adjuster used for set bolts, desks, storage stands and the like.

[0002]

2. Description of the Related Art Many conventional locking mechanisms have a devised nut side, which is inconvenient when a counterpart body is provided with a tapped hole. In many cases, a spring seat is used so as not to be loosened, but there is no effect unless tightened, and it is useless in a loosened state. Therefore, in many cases, the male screw side or the female screw side is made of a resin having a large friction coefficient, but this resin made has a drawback in that the strength is weak.

[0003]

The bolt can be applied to a mere tapped hole, and there is no bolt which does not loosen at any position during screwing in and has high strength. The present invention has been made to solve this inconvenience.

[0004]

A groove (3) is provided over the entire length of the threaded portion (2) of a strong bolt (1) made of steel or the like.
A filler (4) having a high elasticity and a high coefficient of friction, such as rubber, is put in the groove (3), and the filler (4) is made slightly larger than the root diameter of the threaded portion (2). 5) A bolt with a locking mechanism configured to contact the thread (6) of (5).

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 and 2. A U-shaped groove (3) is provided over the entire length of a screw portion (2) of a steel bolt (1). A rubber filler (4) is inserted into the groove (3), and the filler (4) is slightly larger than the root diameter of the screw portion (2), and the thread (6) of the mating female screw (5) is formed. ).
The groove (3) also needs to have the shape shown in FIG. 3 so that the filler (4) does not fall off without the adhesive.

[0006]

According to the present invention, the bolt used when the bolt head is idle, that is, a set bolt or a level adjuster is most suitable for preventing loosening. Also,
In the case of an assembly type product, there is no fear of loosening during transportation and falling off or being lost even if the bolt of each part is not screwed into the female screw and tightened.

[Brief description of the drawings]

FIG. 1 is a front view and a sectional view of the present invention.

FIG. 2 is an enlarged sectional view of the thread of the present invention.

FIG. 3 is an enlarged sectional view of a groove according to the present invention.

[Explanation of symbols]

 1 Bolt 2 Thread 3 Groove 4 Filler 5 Female Thread 6 Thread

Claims (1)

[Claims] A groove (3) is provided over the entire length of a screw portion (2) of a bolt (1), and a filler (4) rich in elasticity and having a high friction coefficient like rubber is put in the groove (3). A bolt with a locking mechanism, wherein the filler (4) is slightly larger than the root diameter of the threaded portion (2) and is in contact with the thread (6) of the mating female screw (5).