JPS5940618Y2 - Pipe with threaded groove - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pipe having a thread receiving groove, and more particularly, to a pipe having a thread receiving groove that is easy to draw and that does not have eccentricity in the thread receiving groove after drawing.

Decorative pipes used for handrails, lattices, etc. are drawn to form uneven walls.

In order to facilitate the connection of this type of decorative pipe to other members such as girder members, a screw receiving groove is provided approximately at the center of the pipe and extends in its longitudinal direction.

If the side wall that forms the screw receiving groove is supported inside the pipe by a connecting wall extending from the inner wall of the pipe, these connecting walls and side walls will resist during drawing, and the pipe may not have the desired shape. Or, the screw receiving groove becomes eccentric after drawing, making it impossible to connect it to other parts.

The object of this invention is to provide a pipe with a threaded groove that eliminates the above-mentioned drawbacks.

An embodiment of this invention will be described with reference to the accompanying drawings.

The pipe 1 having a thread receiving groove has a thread receiving groove 3 approximately in the center of the pipe body 2.

The screw receiving groove 3 is defined by a side wall 4 having a circular cross section, and has an opening 5 that opens a part of the side wall 4.

Connecting walls 6 are positioned approximately 90 degrees from the center line of the opening 5 and extend in opposite directions from the outer peripheral surface of the side wall 4 in the tangential direction thereof.

An extension line of one connecting wall 6 is parallel to the other connecting wall 6.

A stepped portion 7 is formed at the connecting portion between the side wall 4 and the connecting wall 6 on the connecting wall 6 side.

The thickness of the connecting wall 6 is made to be approximately equal to or thinner than the thickness of the pipe body 2.

It is recommended to make slits in the connecting wall to facilitate deformation during drawing.

When the aforementioned pipe 1 is subjected to the drawing process, external force is applied to the connecting wall 6.
It concentrates on the connection part between the side wall 4 and the side wall 4, and the connection wall 6 deforms while causing a rupture phenomenon in this part, reducing the pipe diameter.

Since the connecting wall firmly supports the side wall 4 on the end face of the pipe after the drawing process, the drawing process does not affect the end face of the pipe, and the screw receiving groove 3 does not become eccentric.

As is clear from the above, even if the pipe end face is drawn, the screw receiving groove is firmly held by the connecting wall without being affected by the drawing process.

In addition, there is no eccentricity of the screw receiving groove on the pipe end surface, making it possible to easily screw the girder material, etc.

[Brief explanation of the drawing]

The figure is an end view showing a pipe according to an example of this invention. In the diagram: 1...Pipe, 2...Pipe body, 3...Screw receiving groove, 4...Side wall, 6
...Connecting wall, 7...Step part.

Claims (1)

[Scope of utility model registration request] A screw receiving groove is integrally provided approximately in the center via a pair of connecting walls,
An opening is provided in a part of the screw receiving groove, and the pair of connecting walls is located at an angle of approximately 90 degrees from the center of the opening, and the outer periphery of a side wall defining the screw receiving groove. A pipe having screw receiving grooves extending in opposite directions from a surface in a tangential direction thereof.