JPH0234489Y2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Purpose of the Invention The present invention relates to a structure for preventing loosening of a support such as a microphone stand.

Conventionally, when holding a support such as a microphone stand that is installed on the floor, a thin circular stand is installed on the floor at the bottom end, a through hole is made in the center, and a short cylindrical support support is installed on the floor. The pipe-shaped support was screwed into the support screw, and the pipe-shaped support was screwed into the support screw to hold the support.

However, this method simply fits the lower part of the support into the support screw and fastens it with a rotating screw, so if external vibration or pressure is applied, the rotation tends to loosen, so adhesives may be used. , or the fixing screw is inserted into the support screw through the outside support, but these methods not only make it difficult to remove the support again, but also cause the thread of the support screw to be pressed. There were also drawbacks such as breakage.

The present invention focused on the mounting structure of these columns and was devised to solve many of the drawbacks mentioned above.The present invention has been developed to solve the many drawbacks mentioned above. This invention was made with the aim of providing a structure for preventing loosening of the support pillar, which allows the support support to be fixed without rotating, and which is easy to handle and has a simple structure.

(2) Structure of the invention Examples of the invention will be described below in detail based on the drawings.

FIG. 1 shows a sectional view of a main part of the structure for preventing loosening of a column according to the present invention, in which a concave portion 1a curved in an arc is formed on the circumferential side near the upper end of the column receiving screw 1. The shape of the support screw 1 is as follows:
The whole has a short, almost cylindrical shape, and a flange-like protrusion 1b is formed on the circumferential surface of the upper end, and the above-mentioned recess 1a is formed below this protrusion 1b, and the entire lower part is approximately the upper half. A spiral thread 1c is formed in the lower half, and a flat surface 1d is formed substantially in the lower half.

In order to hold and fix the above-described support screw 1 to a stand 2 installed on a floor or the like, a through hole is provided in the center of the stand 2 that matches the flat surface 1d of the support screw 1. The flat surface 1d is welded and fixed to the welded part, that is, the strut receiving screw 1 above the welded part.
A screw thread on the inner peripheral surface of the lower end of the support 3 is rotationally fitted into the thread 1c of the support 3, and the support 3 is rotationally tightened until the lower end surface of the support 3 comes into contact with the top surface of the base 2. At this time, the above-mentioned strut receiving screw 1
An insertion opening 3a into which the fixing screw 4 is to be inserted is inserted into one part of the column 3 at a position corresponding to the recess 1a in
is provided to form a thread on the inner periphery, and this insertion opening 3
A fixing screw 4 is screwed to the column a, and the tip 4a of the fixing screw 4 is brought into contact with the recess 1a of the column receiving screw 1 to fix the column 3. As a result, vibration and pressure are applied to the column 3 from the outside. Therefore, even if the support 3 tries to rotate, the protrusion 1b at the upper end of the support screw 1 will
Since the fixing screw 4 protrudes from the recess 1a,
The side surface of the fixing screw 4 hits the protrusion 1b, and the support 3
Loosening is to be prevented.

(3) Effects of the invention In the pillar loosening mechanism of the present invention, which has the above-described structure, the pillar is provided with an insertion opening for inserting a fixing screw, and a recess is formed in the upper part of the conventional pillar receiving screw. The rotation of the column has the practicality of making the molding process extremely easy as it only requires forming, and since the construction work is also simple, anyone can assemble it uniformly and reliably without making any mistakes. This is an idea that made it possible to prevent this.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part of the structure for preventing loosening of a strut according to the present invention, and FIG. 2 is an exploded view of the same. 1... Prop support screw, 1a... Recess, 1b... Protrusion, 1c... Screw thread, 1d... Flat surface, 2...
Base, 3... Support, 3a... Insertion port, 4... Fixing screw, 4a... Tip.

Claims (1)

[Scope of utility model registration request] A support screw having a short, almost cylindrical shape, with its lower part welded and fixed to a through hole in the center of the stand, has a flange-like protrusion on the circumferential surface of the upper end, and a recess curved in an arc below the protrusion. Further, a thread is formed below the thread, and on the other hand, one insertion hole is provided in the column that is rotatably fitted to the column receiving screw at a position corresponding to the recess, and the fixing screw is inserted into the insertion hole. A mechanism for preventing loosening of a column, characterized in that the tip of the column is brought into contact with a concave portion of a column receiving screw.