JP3102597U - Hollow pipe for assembly - Google Patents

Abstract

An object of the present invention is to provide a hollow pipe for assembling, which increases the structural strength of the pipe itself, reduces the weight per unit length in the axial direction of the pipe itself, secures necessary pipe strength, and is easy to manufacture. The purpose is to:
A rib having an outer diameter of 28 mm, a length of 4 m, an outer peripheral wall 2 of 1 mm, and a cross-shaped rib 3 integrally formed in a pipe in four directions from the center of the pipe. Have been. These ribs 3 are formed continuously in the longitudinal direction of the pipe and parallel to the axial direction of the pipe. Therefore, the inside of the pipe is partitioned into four spaces.
A radius having a radius of 0.5 is formed at a connection portion between the outer peripheral wall 2 and the ribs 3 of the pipe. These radiuses are for preventing stress from being concentrated on the connecting portions of the ribs 3 when a load is applied to the pipe.
[Selection diagram] Fig. 1

Description

  This invention relates to a hollow pipe for assembly manufactured by extrusion molding of, for example, aluminum.

  2. Description of the Related Art In factories, homes, and the like, an assembly pipe and a joint for assembling the assembly pipe are easily combined to assemble and use a lightweight three-dimensional structure such as a shelf. As this assembling pipe, a so-called resin-coated steel pipe in which the surface of a thin steel pipe is coated with a synthetic resin and bonded, a light metal pipe, a synthetic resin pipe, and the like are used.

Japanese Patent Publication No. 55-35206 (Patent Document 1) describes an extrusion molding method of a hollow pipe whose outer periphery is decorated in a spiral shape. By using the method and the die disclosed in this publication, a pipe having a peripheral wall shape that is spirally continuous along the pipe axis direction can be obtained. According to the company, this pipe can be expected to have a decorative effect that has never been seen before, and can be used in a wide range of applications.
JP-B-55-35206

  However, since the inside of the hollow pipe manufactured by the invention disclosed in Patent Document 1 is hollow, depending on the usage state of the pipe, the rigidity of the pipe may be insufficient and the hollow pipe may be deformed. It may occur. To increase the rigidity, the thickness of the pipe is increased, and the weight is increased.

  Further, in the case of a resin-coated steel pipe, since the resin is bonded to the steel pipe, there is a problem that it is difficult to reuse the pipe if the pipe for assembly becomes unnecessary or is bent and cannot be used.

  The present invention has been made in order to solve the above-mentioned problems, and increases the structural strength of the pipe itself, improves the strength against bending, and reduces the weight per unit length in the axial direction of the pipe itself. It is another object of the present invention to secure necessary pipe strength, maintain a constant strength in the circumferential direction of the pipe, and facilitate the manufacture of the pipe.

  In order to achieve this object, the hollow pipe for assembling according to claim 1 is formed integrally with the outer peripheral wall of the pipe radially from the central axis of the pipe to the outer periphery at equal angular intervals in the circumferential direction. And a plurality of ribs.

  The hollow pipe for assembling according to claim 2 is the hollow pipe according to claim 1, wherein the outer peripheral wall has a circular cross section.

  The hollow pipe for assembling according to claim 3 is the hollow pipe according to claim 1, wherein an outer shape of a cross section of the outer peripheral wall is a polygon, and a plurality of radially extending from a central axis of the pipe to respective inner angles of the polygon. Has ribs.

  A hollow pipe for assembling according to a fourth aspect is the hollow pipe according to any one of the first to third aspects, wherein the hollow pipe for assembling is formed by extruding aluminum.

  The hollow pipe for assembly of the present invention has the following effects because it is configured as described above.

  According to the hollow pipe for assembling according to the first aspect, since the plurality of ribs are formed integrally with the outer peripheral wall in the pipe radially from the center of the pipe to the outer periphery at equal angular intervals in the circumferential direction, the ribs are formed. Since the pipe wall is supported from the inside, the amount of deformation can be suppressed with respect to an external force applied to the pipe. In addition, by providing the ribs inside the pipe, the rigidity of the hollow pipe itself can be increased and the strength can be improved, so that the use of the hollow pipe and the range of use thereof can be expanded. In addition, there is an effect that the mass per unit length of the hollow pipe can be reduced.

  According to the assembling hollow pipe of the second aspect, in addition to the effect of the assembling hollow pipe of the first aspect, the outer circumference is circular, so that the rigidity is high and the assembling with the joint is easy. is there.

  According to the hollow pipe for assembling according to the third aspect, in addition to the effect of the hollow pipe for assembling according to the first aspect, the outer periphery is polygonal, so that it has a decorative effect on the appearance and the rib is centered. Therefore, there is an effect that the rigidity in the circumferential direction can be kept constant, and a hollow pipe whose strength does not extremely vary depending on the position where a load is applied can be obtained.

  According to the assembling hollow pipe according to the fourth aspect, in addition to the effect of the assembling hollow pipe according to any one of the first to third aspects, the assembling hollow pipe is formed by extruding aluminum. Therefore, there is an effect that it is particularly lightweight, has high rigidity, is hardly rusted, and has a decorative effect.

  Next, an embodiment of the present invention will be described. FIG. 1 is a perspective view of an assembling hollow pipe 1 according to the present invention. A rib 3 is integrally formed in a cross shape in the direction. These ribs 3 are formed continuously in the longitudinal direction of the pipe and parallel to the axial direction of the pipe. Therefore, the inside of the pipe is partitioned into four spaces.

A radius having a radius of 0.5 is formed at a connection portion between the outer peripheral wall 2 and the ribs 3 of the pipe. These radiuses are for preventing stress from being concentrated on a connecting portion between the outer peripheral wall 2 and the ribs 3 and a connecting portion between the ribs 3 when a load is applied to the pipe. The hollow pipe for assembly is formed by extruding aluminum.
Therefore, this hollow pipe for assembling was lightweight (310 g / m), increased in strength (1200 mm wide and withstands a load of 27 kg), and its use was greatly expanded. Further, since the hollow pipe for assembly is made of only aluminum, it can be recycled. A so-called resin-coated steel pipe in which the surface of a conventionally used thin-walled steel pipe is coated with a synthetic resin and bonded has a problem that it cannot be recycled.

  The outer peripheral wall 2 and the rib 3 of the assembling hollow pipe shown in FIG. 1 have a constant thickness, but the cross-sectional shape of the hollow pipe depends on the shape of the die for extruding and the method of dividing. Therefore, the shape and dimensions are not limited to those shown in FIG.

FIG. 2 shows a sectional shape of another embodiment of the hollow pipe for assembly.
2 (a), 2 (b) and 2 (c), the outer shape is circular, and the ribs in the pipe are (a) in two directions from the center of the pipe (in the shape of a letter). (C) is radially formed at equal intervals in five directions in three directions.

  (D) has a square outer shape and ribs are formed diagonally, and (e) has a square outer shape and ribs are formed parallel to the sides of the square of the outer shape.

  (F) is an outer shape of a regular pentagon, and ribs are formed radially from the center of the pipe to each inner angle.

  In addition, these hollow pipes for assembly may be formed by extruding aluminum, or may be formed of steel, resin, or the like.

FIG. 3 is a schematic perspective view of the hollow pipe for assembly of the present invention. It is a figure which shows the other example of the cross section of the hollow pipe for assembly.

Explanation of reference numerals

1 hollow pipe for assembly 2 outer peripheral wall 3 rib

Claims (4)

In the hollow pipe for assembly,
The outer wall of the pipe,
An assembling pipe comprising: a plurality of ribs formed integrally with the outer peripheral wall radially from a central axis of the pipe to an outer periphery at equal angular intervals in a circumferential direction.   The hollow pipe for assembling according to claim 1, wherein an outer shape of a cross section of the outer peripheral wall is circular.   The assembly pipe according to claim 1, wherein an outer shape of a cross section of the outer peripheral wall is a polygon, and has a plurality of ribs radially from a central axis of the pipe to respective interior angles of the polygon. The assembly pipe according to any one of claims 1 to 3, wherein the assembly hollow pipe is formed by extruding and molding aluminum.

Images