JP2008291945A - Pipe joint for folding pipe rack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint for a folding pipe rack for frequently repeated transport and storage for lease and rental use, eliminating complicatedness in setting up, durable to long-period use to prevent oscillation, and achieving smooth opening and closing. <P>SOLUTION: In this pipe joint of the folding pipe rack, a depth pipe engagement member as a folding member of a pipe joint, which was a cause of oscillations in a prior art, is integrally molded, and a pipe joint body is divided into two in a vertical direction from a center of the bearing hole, so that a regular cylindrical rotary shaft integrally formed in a fitting groove passes through a regular circular bearing hole bored at a rotation supporting part extending at a pipe joint body base. While the rotary shaft is nipped by the bearing hole, which is divided into the right and left semi-circular parts, a lock pin or the like is press-fit in a lock hole bored on a joint face of the pipe joint body and integrated into one body. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pipe joint of a product display pipe shelf for leasing and rental, and in particular, folding a whole shelf by adopting a structure in which a pipe support part in a depth direction linked to a pipe joint base part is rotatable in a horizontal direction. The present invention relates to a pipe joint for folded pipe shelves that can be used.

  The pipe joint of the initial folding pipe shelf is a flange type in which the tip of a flat plate extending in the depth direction of the shelf is formed in a semicircular shape from the base where multiple pipe insertion parts intersect at a right angle, and a bearing hole is opened in the center The rotation support portion is fitted into a fitting groove provided in the pipe fitting member in the depth direction, and is engaged with a screw as a rotation shaft.

  However, since pipe fittings engaged by screws impair the appearance of the entire shelf, two types of pipe fittings of the same type with the upper and lower screwing positions changed are necessary. However, there was a drawback that it loosened and fell off.

  Therefore, the inventor of the present invention has a configuration in which the pipe fitting member in the depth direction is divided into two parts in the vertical direction, and a cylindrical dowel serving as a rotating shaft is projected on one side and a shaft on the other side. After providing a hole and performing surface treatment, the invention was completed by inserting the bearing hole of the rotation support portion and press-fitting with a press, and obtained a patent. (Patent No. 3204494)

  The pipe joint of the patent solved the problem of aesthetics, eliminated the trouble of assembling pipe shelves, and reduced the stock type of pipe joints, but the size of using 16 mm square pipes The press-fitting strength cannot be said to be sufficient due to the restrictions of the above, and the fitting part of the depth pipe fitting member that sandwiches the rotation support part widens as the press-fitting part loosens as it is frequently folded and leased and leased and transported. As a result, there arises a problem that the shaking in the depth direction of the pipe shelf becomes large.

  Therefore, the inventor of the present invention provides a notch portion in the bearing hole of the rotation support portion extended to the base portion of the pipe joint to provide a mounting shaft for the rotation shaft, and the depth pipe insertion member is fitted to the rotation support portion. The groove and the cylinder are made into an integral mold with a substantially parallel elliptical column-shaped rotation shaft that is scraped off in two parallels slightly narrower than the mounting opening, and a resin rotation is used to prevent displacement of the rotation shaft. We applied for a patent again with a configuration using a moving shaft pressing member. (Patent application 2003-104621)

  However, when the folded pipe shelf is expanded again, the corners of the pivot shaft, which has a substantially parallel elliptical columnar shape, are worn by rubbing against the notch portion of the bearing hole, and smooth rotation is possible as the shelf is repeatedly installed and stored. It turned out to be a cause of hindrance.

JP 2004-270908 A Patent No. 3204494

  The prior art by the inventor of the present invention solves the problem of aesthetics of the pipe joint for folded pipe shelves, eliminates the complexity when assembling the pipe shelves by reducing the type of the pipe joints, and allows the undulation in the depth direction. However, it is a new issue to provide a pipe joint for folded pipe shelves that is less likely to wear on the rotating part even after repeated installation, folding, storage, and transportation by lease and rental use. It was.

  In order to solve the above-described problems, a pipe joint for a folded pipe shelf according to the present invention is a pipe joint for a folded pipe shelf configured such that a pipe member in a depth direction can be folded at right angles to a pipe member in a frontage direction. A pipe joint having a semicircular tip formed at the center of a flat plate-like rotation support portion extending in a depth direction of the shelf from a base portion where a plurality of pipe insertion portions intersect at a right angle, and having a bearing hole at the center thereof In a pipe joint having a structure in which a main body is engaged with a fitting groove formed in a pipe fitting portion in the depth so that the rotary support portion is rotatably held by a rotary shaft, the pipe joint main body 10 is connected to the rotary support portion. A structure in which the rotating shaft 22 formed integrally with the pipe fitting portion 12 in the depth is joined and joined so as to be fitted into the bearing hole 14 by being divided into two vertically from the center of the bearing hole 14 of the thirteen. It is.

Moreover, it is also the structure by which the pipe-joint main body formed by dividing into two is united and joined by the some locking pin which is another member with the some locking hole pierced by both the mating surfaces.
Further, the pipe joint main body formed by dividing into two parts may be integrated by a plurality of dowel holes drilled in one of the mating surfaces and a plurality of dowels protruding from the other of the mating surfaces.
Furthermore, a semicircular groove is provided in the full width in the longitudinal direction of both mating surfaces so that the pipe joint body formed in two parts becomes a through hole for a power cord such as a lighting fixture. It is also possible to adopt a structure in which grooves are joined to form through holes.

  The depth pipe insertion member according to the present invention is formed integrally, the rotation shaft is a regular cylinder, and the bearing hole of the rotation support portion of the pipe joint body needs to be a perfect circle. In order to pass the integrally formed rotating shaft through the bearing hole, the present invention is manufactured by dividing the pipe joint main body into two parts in the vertical direction from the center of the bearing hole of the rotating support part, and separately manufacturing them in semicircles. After the rotation shaft of the depth pipe insertion member is sandwiched in the formed bearing hole, it is configured to be combined and integrated using a dowel, a locking pin, or the like.

  The pipe joint for a folded pipe shelf according to the present invention eliminates the aesthetic difficulties, assembly difficulties, and screw drop-out caused by using a screw on the rotating shaft, and the depth pipe insertion member is integrated. This eliminates the shaking of the pipe shelf in the depth direction due to the looseness of the rotating shaft.

  The pipe joint body is divided into two parts in the vertical direction, the bearing holes of the pivot support part are united into a perfect circle, and the pivot shaft is a regular cylinder. Withstand use. (The actual number of rotations by folding the shelf is extremely small compared to the number of rotations of the rotating shaft of general machinery, so there is no problem if it is a friction between a perfect circle and a perfect circle.) In molding, a through hole for a power cord such as a luminaire that requires secondary processing can be easily formed, and the weight of the product can be reduced.

  In the best mode of implementation of the present invention, the plurality of pipes to be engaged are rectangular pipes of 16 to 19 mm square, and are engaged in a state where they are shifted 45 degrees with respect to the horizontal and vertical directions. This is a pipe joint for a folded pipe shelf for forming a framework and mounting a shelf board on a 45 ° inclined portion to realize a product display shelf.

  Hereinafter, the pipe joint for folded pipe shelves according to the present invention (hereinafter referred to as “the pipe joint”) will be described in detail based on the embodiments shown in the drawings. FIG. 1 is a perspective view showing an overall state of the pipe joint 1 according to the present invention before the union, and is composed of a left part, a right part, a plurality of locking pins 30 and a depth pipe insertion member 20 of the pipe joint body 10. The The pipe joint main body 10 is in a state of being divided into two parts from the center of the bearing hole 14 of the rotation support part 13 extended to the base part 11 where a plurality of pipe insertion parts 12 intersect to the pipe insertion part 12 in the vertical direction.

  A plurality of locking holes 16 are formed in the left and right mating surfaces, and the depth pipe is inserted into the left and right symmetrical semicircular bearing holes 14 cut out in the mating surfaces of the left and right rotation support portions 13. At the same time that the rotation shaft 22 of the member 20 is sandwiched, a plurality of locking pins 30 are press-fitted into the locking holes 16 and the left and right are combined and integrated.

  The depth pipe insertion member 20 is integrally formed by providing a pipe insertion portion 12, a fitting groove 21 for sandwiching the turning support portion 13 of the pipe joint body 10, and a cylindrical turning shaft 22 in the fitting groove. It is.

  FIG. 2 is a plan sectional view of the pipe joint 1 which is integrated and completed. The state where the rotation shaft 22 of the depth pipe insertion member 20 is held in the bearing hole 14 of the rotation support portion 13 divided into two parts is shown. The pipe joint body 10 is united by the locking pin 30 so that the bearing hole 14 becomes a perfect circle, and the pivot shaft 22 having a perfectly circular cross section is firmly engaged with the pivot shaft 22. Moreover, the semicircle groove | channel provided in the mating surface vertical direction full width becomes a circular through-hole (through-hole 15) by uniting.

  FIG. 3 is a perspective view of the completed pipe joint 1. In the present embodiment, the pipe insertion portion 12 intersecting at the base portion 11 has five locations including the insertion member 20 of the depth pipe, but two, three, and four types are conceivable. Folding pipe shelves are assembled.

  Folding pipe shelves are already used in many department stores, mass merchandising stores, etc. by conventional techniques, but in the pipe joint for folding pipe shelves of the present invention, the depth pipe insertion member is integrally formed including the rotating shaft. Therefore, leasing and rental that transport and storage are repeated frequently by realizing smoother opening and closing of the shelf while eliminating the complexity of inventory and inventory caused to eliminate the aesthetic difficulties of pipe shelves As a fixture, it is possible to provide a folded pipe shelf that can withstand long-term use as compared to products according to the prior art.

  In addition, by providing a through hole in the vertical direction of the main body, not only can a power cord such as a luminaire be connected, but also a significant reduction in product weight is achieved, contributing to a reduction in raw materials.

It is a perspective view which shows the state before the union | combination of the whole pipe joint of this invention. It is a plane sectional view of the pipe joint after union of the present invention. It is a perspective view of the completed pipe joint of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe joint 10 Pipe main body 11 Base 12 Pipe insertion part 13 Rotation support part 14 Bearing hole 15 Through hole 16 Locking hole 20 Depth pipe insertion member 21 Fitting groove 22 Rotating shaft 30 Locking pin

Claims (4)

A pipe joint for folding pipe shelves that allows the pipe member in the depth direction to be folded at a right angle with respect to the pipe member in the frontage direction. The tip of the flat plate-shaped rotation support portion provided is formed in a semicircular shape, and the rotation is inserted into the fitting groove formed in the pipe fitting portion in the depth in the pipe joint body having a bearing hole formed in the center thereof. In a pipe joint having a structure in which a support portion is rotatably sandwiched by a rotation shaft,
The pipe joint main body 10 is divided into two in the longitudinal direction from the center of the bearing hole 14 of the rotation support portion 13, and the rotation shaft 22 formed integrally with the pipe fitting portion 12 in the depth is inserted into the bearing hole 14. A pipe joint for a folded pipe shelf, characterized in that it is a united and joined structure so as to be in a state. The folding joint according to claim 1, wherein the pipe joint main body formed by dividing into two is joined and joined by a plurality of locking holes which are formed on both mating surfaces and a plurality of locking pins which are separate members. Pipe shelf fittings. The pipe joint main body formed by dividing into two parts is integrated by a plurality of dowel holes drilled in one of the mating surfaces and a plurality of dowels protruding from the other of the mating surfaces. Folding pipe shelf fittings as described. A semicircular groove is provided in the full width in the vertical direction of both mating surfaces so that the pipe joint body formed by dividing into two is a through hole for a power cord of a lighting fixture, etc. The pipe joint for a folded pipe shelf according to claim 1, wherein a through hole is formed.

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