JPH0558923U - Pipe fitting - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The present invention relates to improvement of pipe joints for square pipes such as assembly shelves, and in particular, to structurally join conventional rotary pipe joints and tap-in pipe joints The present invention relates to a composite type pipe joint, and relates to a pipe joint of a type in which a square pipe is fitted into a pipe fitting portion and then rotated and firmly fixed. [Structure] In a pipe joint 1, a pipe fitting portion 3 is formed into a tapered columnar body having a substantially octagonal cross section.
Is inserted into a square pipe and then rotated by 45 degrees to firmly surface-join the joint surface of the pipe fitting portion 3 and the inner wall 4a of the square pipe 4 to join and fix the pipe member 4 to form an assembly shelf. It is 1.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an improvement of a pipe joint for a square pipe, and more particularly to a composite pipe joint in which a conventional rotary pipe joint and a tap-in pipe joint are structurally connected.

[0002]

[Prior Art]

 Assembled pipe units are used for product display shelves and showcases at department stores and retail stores. In the case of the assembly type, in addition to the convenience of assembling on-site without the trouble of carrying and moving the shelves, there is an advantage that it can be assembled in a shape that matches the shape of the sales floor.

A pipe joint of a pipe member is mounted with a plurality of pipes by tapping a pipe fitting portion having an outer diameter substantially the same as the inner diameter of the pipe and a tapered pipe fitting portion into a round pipe member or a square pipe member with a hammer or the like. Many of them were assembled and assembled. Further, in the case of the square pipe member, there is a type in which the pipe fitting portion of the pipe joint is fitted into the square pipe member while being displaced by 45 degrees, and then the pipe joint is rotated by 45 degrees and fixed. ..

[0004]

[Problems to be solved by the device]

 In the conventional rotary pipe joint, it is easy to fit the fitting part to the square pipe and rotate it, but it is solid because the area of the joint part between the pipe inner wall and the fitting part is small in the fitted state. There was a drawback that the adhesion could not be guaranteed. For this reason, the continued use of the shelves caused looseness in the assembled shelves, causing the shelves to shake.

Further, after inserting the pipe fitting portion into the square pipe member, a material having some elasticity or contractibility is used as a material of the fitting portion or the fitting portion in order to assist the rotation of the square pipe member. However, there was a drawback that the joining state was not solid. Therefore, from this point as well, there is a possibility that the fitting state may become loose and the coupling of the pipe joint may loosen and fall out after many years of use.

On the other hand, in a tap-in type pipe joint, the fitting state is generally firm, but there is a drawback in that the work of hammering the pipe joint into the pipe is troublesome during assembly. Also, because there is a tolerance between the inner diameter of the pipe and the outer diameter of the fitting part, if you forcibly tap the pipe joint, the joint surface of the fitting part will be shaved and the inner wall of the pipe will be pressed strongly to reduce the outer diameter of the pipe. It was also a result of inflating.

The present invention is a composite pipe joint that solves the above-mentioned problems and structurally combines the advantages of the rotary pipe joint and the tapping pipe joint, and is easy to insert and fit. The purpose is to provide a solid pipe joint that is easily pivotable and is in a joined state.

[0008]

[Means for solving problems]

 In order to achieve the above-mentioned object, a pipe joint according to the present invention is a pipe joint in which a plurality of pipe fitting portions are integrally formed so as to intersect the base of a cube at right angles. Is formed into a tapered columnar body having a substantially octagonal cross section, and the fitting portion is inserted into the square pipe by rotating it by 45 degrees, and then is displaced by 45 degrees to firmly fix the joint portion of each pipe fitting portion to the inner wall of the square pipe. It is configured to abut and adhere to.

Further, in the pipe joint according to the present invention, the pipe fitting portion is formed into a columnar body having a substantially octagonal cross section, and the surface of the joint surface of the pipe fitting portion assists the rotation of the pipe and is firm. The structure is formed in a slightly convex curved surface so that the joined state is realized.

[0010]

[Work]

 In the pipe joint according to the present invention, the fitting portion of the pipe connector (pipe fitting) is displaced by 45 degrees to the ends of the plurality of square pipe members having substantially the same inner diameter, and then the square pipe is arranged at 45 degrees. It is a structure in which a shelf is created by rotating and firmly assembling pipes and pipe fittings.

First, a fitting portion of a pipe joint formed in a tapered columnar body having a substantially octagonal cross section is inserted into an end portion of a square pipe member. The number of fittings integrally formed on the base of a cube depends on the shape of the shelf, but in the case of a simple square shelf, all four corners are composed of three square pipe members that intersect at right angles. Therefore, there will be three fittings for the pipe joint.

[0012] Each of the fittings of the pipe joint is fitted with the end portion of the square pipe rotated by 45 degrees, and after fitting, it is rotated by 45 degrees with an instrument (wrench or the like) for rotating the square pipe member to join the fitting portions. Assemble the shelves by joining the pipe section and the inner wall of the pipe to firmly fix the pipe and the pipe joint.

[0013]

【Example】

 Hereinafter, a pipe joint according to the present invention will be described in detail based on an embodiment shown in the drawings.

FIG. 1 is a perspective view of a pipe joint according to the present invention. The pipe joint 1 is composed of a base portion 2 and a fitting portion 3. Although the pipe joint shown in the embodiment is made of die-cast, the material of the pipe joint is not limited to this. In addition, although it is possible to partially use different materials, in the embodiment, they are all made of the same metal material and are integrally formed by one mold.

The base 2 is made of a cube or a rectangular parallelepiped, and it is possible to implant fitting portions on each surface, and it is also possible to integrally provide fitting portions on all six surfaces. It is also possible to provide a plurality of fitting portions on the same surface.

The fitting portion 3 is made of the same metal material as that of the base portion, is a rod-shaped body having an approximately octagonal cross section, and is planted at a right angle on the surface of the base portion. Depending on the shape of the shelves, it is possible that they will be planted in a non-right angle. The tip 31 of the fitting portion is formed in a tapered shape, and is devised so that it can be fitted into the pipe easily. It is also possible to form the entire rod-shaped body of the fitting portion into a slightly tapered shape with the portion near the base portion thickened.

Although there is no limitation on the number of fitting portions to be implanted in the base portion of one pipe joint, it is usually 2 to 6 pieces. When connecting shelves vertically or horizontally, pipe joints with different numbers of fittings are required at each corner.

The pipe joint of the embodiment shown in FIG. 1 has a shape in which four fitting portions are planted, and is used as a joint between the cubic shelf and the shelf when assembling a rectangular shelf. It

FIG. 2 is a cross-sectional view of a columnar body having a substantially octagonal cross section, a view showing a bonding state thereof, and an enlarged view of a bonding surface.

The shape of the fitting portion is substantially octagonal in cross section, and includes a wide surface 3a and a joint surface 3b formed on a slightly convex surface. In this embodiment, the cross section is formed into a substantially octagonal shape, but if the bonding surface 3b is provided, the shapes of the other surfaces are not required. That is, the surfaces other than the joint surface are notches or corner reliefs for simply inserting the fitting portion into the end of the square pipe member by displacing it by 45 degrees, and the shape of the notch does not matter.

In the embodiment shown in FIG. 2, the notch portion is the wide surface 3a and is a flat notch. It is also conceivable that the notch is a groove, a groove, or a curved surface.

In use, as shown in the upper right of FIG. 1, the fitting portion 3 of the pipe joint is fitted into the end portion 4b of the square pipe member rotated by 45 degrees. In this embodiment, as shown in FIG. 3, the pipe member is fitted at an angle such that the wide surface 3a and the inner wall surface of the square pipe member are parallel to each other. After fitting, the pipe is clamped and fixed by a gripping tool such as a wrench, and rotated by 45 degrees to obtain the joined state shown in FIG.

In the joined state, the inner wall 4a of the square pipe member and the joining surface 3b of the fitting portion of the pipe joint are firmly face-joined. The joint surface 3b is formed in a slightly convex curved surface so that the pivot pipe can be easily rotated. Further, as shown in FIG. 4, in the fixed state, since the shape of the joint surface 3b is formed in a slightly convex curved surface, the outer wall of the square pipe member is slightly raised even after the rotational contact. As a result, the square pipe member is firmly assembled and fixed by the pipe joint.

[Effect of the device]

 The pipe joint according to the present invention has the following effects because it has the structure described in detail above. Even though the pipe joint is rotatable, the manufacturing cost is low because it is an integral molding of die casting, and the advantage of the small number of parts that is the characteristic of this type of assembly display can be utilized, so preparation of necessary parts Also, procurement is easy. Unlike conventional rotary pipe fittings, the structure is strong and durable enough to withstand many years of use. The fitting operation of the pipe joint into the square pipe member is easy, and the structure is such that it can be rotationally displaced by a simple tool, so handling and assembly are easy.

[Brief description of drawings]

FIG. 1 is a perspective view of the pipe joint of the present invention.

FIG. 2 is a cross-sectional view after displacement of a fitting portion.

FIG. 3 is a cross-sectional view showing a state where the fitting portion is fitted into the square pipe.

FIG. 4 is a partially enlarged sectional view of FIG.

[Explanation of symbols]

 1: Pipe joint 2: Base part 3: Fitting part 3a: Wide surface 3b: Joining surface 31: Fitting part tip 4: Square pipe member 4a: Inner wall

Claims (2)

[Scope of utility model registration request] 1. A pipe joint in which a plurality of pipe fitting portions are integrally formed so as to intersect a base of a cube at right angles, and the pipe fitting portions are inserted into a square pipe and then rotated by 45 degrees to join the pipe fitting portions. A pipe joint in which each pipe fitting portion is formed in a tapered columnar body having a substantially octagonal cross section so that the surface and the inner wall of the square pipe are firmly surface-joined to join and fix the pipe member. 2. The pipe fitting portion according to claim 1, wherein the surface of the joining surface of the pipe fitting portion formed of a columnar body having a substantially octagonal cross section is formed into a slightly convex curved surface. Characteristic pipe joint