JP3204494B2 - Fitting for folding shelf - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint of a prefabricated pipe shelf used for a product display, and more particularly, to a pipe joint in a depth direction of the pipe joint which is formed to be horizontally rotated. It is an object of the present invention to provide a pipe joint for a product display shelf configured so that the whole can be folded.

[0002]

2. Description of the Related Art Conventional product display shelves are of a type assembled at the site where they are used. However, once assembled, they are rarely disassembled and reused, and are usually transported as they are assembled. Was often done. The storage and handling of shelves when moving or transporting or when not in use poses a problem, and a type that can be folded without taking up space has been developed for simplicity. In a conventional assembling type pipe shelf, pipe members are connected to each other by a pipe joint and assembled into a shelf. The pipe joint has a configuration in which the pipe fitting portion extends at a right angle from the base portion, and forms a shelf or a continuous shelf using a pipe fitting having a plurality of fitting portions prepared in advance for each corner. . When fitting the pipe into the fitting portion of the pipe joint, there is also a method of hitting with a hammer or the like, but the pipe fitting portion is formed by displacing the pipe fitting portion by 45 degrees with respect to the square pipe member, and the square pipe member is inserted into the fitting portion. A method of assembling by rotating a square pipe member by 45 degrees with a wrench or the like is also adopted.

[0003] The structure of a pipe joint used for a folding shelf in which a pipe member in the depth direction can be bent with respect to a pipe member in the frontage direction is formed from a base of the pipe joint in which a plurality of pipe fitting portions extend at right angles. A support portion having a semicircular tip is extended in the depth direction, a shaft hole is formed at the center of the support portion, and the flange-type rotary support portion is inserted into a pipe fitting portion in the depth direction. It is fitted into a fitting groove provided integrally with the extension part and is rotatably engaged with a screw.

[0004] However, pipe joints engaged by screws not only impair the appearance of the entire shelf as shown in FIG.
There is a drawback that the screws loosen and fall off during transportation, and play occurs during long-term use. Also, as shown in FIG. 3, a conventional pipe joint for a folding pipe shelf is provided with a corner on one side in the horizontal direction of the extension of the pipe fitting portion in the depth direction, and the entire shelf is opened when used. When the corners come into contact with the base of the pipe joint, the pipe in the depth direction is designed to be perpendicular to the pipe in the frontage direction, but there is a drawback that the folding direction is only one side .

[0005] There is also a pipe joint in which the base in the depth direction is extended to form a semicircular shape and can be folded to both the right and left. There was a disadvantage of becoming.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a shelf for a prefabricated product display, in which the fittings do not use screws that can be loosened and come off without losing their appearance. In this way, it is possible to fold in either the left or right direction, and furthermore, when the entire shelf is opened for use, the pipe in the depth direction is surely at right angles to the pipe in the frontage direction. Is to do.

[0007]

In order to achieve the above object, a pipe joint according to the present invention has a structure in which a pipe member in a depth direction can be bent with respect to a pipe member in a frontage direction. From the base where the pipe fitting part intersects at right angles, extend the support part with the tip part formed in a semicircular shape in the depth direction,
At the center, a shaft hole as a fulcrum of rotation is bored,
The pipe fitting portion in the depth direction is vertically divided into two parts, and the surface that comes into contact with the base is formed in an arc shape. A dowel serving as a rotation axis is protruded at the base of one pipe fitting portion, and the other pipe fitting portion is formed. A bearing hole in which the dowel fits is formed at the base of the dowel, and the dowel is rotatably engaged with a shaft hole of a support portion extending from the base. Further, the square pipe member is fitted in a pipe fitting part of a pipe joint formed integrally so that a plurality of pipe fitting parts intersect at right angles at the base part with the square pipe member displaced by 45 degrees, and after fitting, the square pipe is rotated by a wrench by 45 degrees. And is fixed to the pipe fitting portion.

Further, the supporting portion extending in the depth direction of the base portion has a hemispherical concave portion in the plane portion thereof, and the base portion of the pipe fitting portion divided into two is located at a position corresponding to the concave portion of the supporting portion. A cylindrical concave portion is provided to embed a coil spring and a bearing or a pin having a hemispherical tip, or a low semispherical convex portion is protruded at a position corresponding to the concave portion of the support portion to fit a pipe joint. It is possible to add a mechanism for stopping the rotation of the fitting portion so that the tip of the bearing or the pin or the semicircular convex portion fits into the concave portion of the support portion at the position where the portion is at a right angle.

[0009]

The pipe joint according to the present invention has a support portion provided with a shaft hole extending from a base portion in a depth direction, and a pipe fitting portion in a depth direction, which is divided into upper and lower parts, is connected to a shaft of the support portion through a dowel. It is configured to be rotatable in the hole, and when assembling the square pipe member into a three-dimensional shelf using various pipe joints in which a plurality of pipe fitting parts are integrally formed at the base, the depth direction The bendable pipe joint according to the present invention is used for the pipe joint used in the present invention. Similarly, a fitting that can be bent in the depth direction (front side) is attached to the opposite fitting.
As a result, the vertical pipe member and the horizontal (frontage direction) pipe member are connected and assembled by the non-rotating pipe joint and are not moved because they are assembled, but the depth pipe member can be folded by the pipe joint according to the present invention. The shelf can be folded so as to move laterally with the front and back surfaces shifted from the cubic state as a whole and folded into a flat plate shape.

Further, a concave portion is provided at the base of the support portion and the pipe fitting portion extending in the depth direction, and a coil spring and a bearing or a pin having a hemispherical tip are buried, and pressed at a right angle position. Since the tip of the bearing or the pin fits into the recess of the flat part, the rotation of the fitting part can be stopped at a right angle position, so that the right angle can be easily obtained at the time of use. There is no need to worry about the shelves shifting. In addition to the combination of the coil spring and the bearing, it is also possible to provide a semicircular projection. At the time of rotation, when the depth pipe is rotated in the horizontal direction against the pressing of the spring, the pin or the bearing is detached from the concave portion and can be rotated. The pipe joint for a folding foldable shelf according to the present invention has a structure in which the shelf is rotated by a dowel. When used, the springs ensure that the pipes in the opening and depth direction are at right angles to each other. Further, the vertically inserted fitting portions in the depth direction are press-fitted by a dowel or the like, and are fitted into the pipe after assembly, so that there is no fear of disassembly.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a pipe joint for a folding shelf according to the present invention. FIG. 1 is a perspective view showing the whole of a joint type folding shelf pipe joint according to the present invention, FIG. 2 is a sectional view of the joint type folding shelf tube joint according to the present invention, and FIG. FIG. 4 is a plan view of a folding shelf pipe joint displaced by 45 degrees, and FIG. 5 is a plan view of the assembled folding shelf pipe joint according to the present invention. The pipe joint 1 for an assembling-type folding shelf according to the present invention is configured such that a square pipe member is fitted into each fitting portion to constitute a shelf, and is vertical (vertical).
The fitting portion 10 includes a fitting portion 10 of the square pipe member in the direction x, a fitting portion 20 in the horizontal (horizontal) direction y, and a fitting portion 30 in the depth direction z. A different point from the conventional pipe joint is that the fitting portion 30 in the depth direction z is formed so as to be able to rotate by 180 degrees with respect to the base 3 of the pipe joint.

The prefabricated folding shelf is a framework of a frame that forms a cube composed of a vertical (vertical) direction pipe member, a horizontal (horizontal) direction pipe member, and a depth direction pipe member. In this configuration, a horizontal shelf board is mounted to display products. The pipe joint has a plurality of pipe fitting portions projecting from the base in a direction perpendicular to the base so as to form a shelf.The pipe fittings having different numbers of fitting portions are appropriately beaten in accordance with the shape of the shelf, and the shelf is appropriately beaten. It is a form to assemble the framework. The pipe joint for a folding shelf according to the present invention has a configuration in which a square pipe member is connected in each of a vertical (vertical) direction x, a horizontal (horizontal) direction y, and a depth direction z, and is fitted in the depth direction z. Only the part is formed rotatably. Although various types of folding shelves of this type have been disclosed, a technique for enabling the folding shelves and a part of a pipe joint used for the folding shelves to be rotatable is disclosed in Japanese Patent Application Laid-Open No. 7-16134, "Easy Assembling Folding Shelf". Are also disclosed. When fitting the square pipe into the pipe fitting portion of the fitting, the flat surface of the square pipe is fitted along the cut surfaces 21 and 31 of the pipe fitting portion, and then the square pipe member is turned 45 degrees using a tool such as a wrench. By rotating, the flat surface of the inner wall of the square pipe is joined to the uncut joint surfaces 22 and 32 of the fitting portions by pressing surfaces, and firmly connected.

The fitting portion 30 in the depth direction of the pipe joint according to the present invention has a structure that rotates 180 degrees horizontally in the horizontal direction, and is adjacent to and parallel to the fitting portion 20 in the horizontal (horizontal) direction shown in FIG. You can rotate until it becomes. Thereby, the assembled shelf can be folded sideways in a crushed state so as to be laterally moved while being assembled, and the pipe member in the depth direction can be bent with respect to the pipe member in the frontage direction. Becomes More specifically, a plurality of pipe fitting portions 10, 20, and 30 extend at right angles from the base portion 3 of the pipe joint. Of the plurality of pipe fitting portions, the fitting portion in the depth direction z has a support portion 33 extending from the base as shown in FIGS. 1 and 5, and a tip portion 33a of the support portion is formed in a semicircular shape. In addition, a shaft hole 35 is formed in the center of the support portion. The fitting portion 30 is rotatably mounted around the shaft hole 35 at the tip of the extending support portion.

The pipe fitting portion 30 in the depth direction includes fitting portions 30a and 30b divided into upper and lower portions and root portions 30c and 30.
d, and upper and lower surfaces 30 that abut against the base 3 of the base portion.
e and 30f are formed in an arc shape so as to be rotatable. In addition, a dowel 37 serving as a rotation shaft is protruded from a root portion 30c of one of the pipe fitting portions. At the same time, a bearing hole 39 through which the dowel is inserted is formed in a root portion 30d of the other pipe insertion portion, and the dowel 37 penetrates the shaft hole 35 of the support portion and is opposed to the root portion 30d. Is rotatably fitted into a bearing hole 39 provided in the first hole. Thereby, the fitting portion is rotatably mounted on the base. The fitting portion 30
a, 30b in order to secure a firm connection between
A dowel m is protruded, and a dowel receiving hole n is drilled at the opposite fitting portion 30b, and the dowel m is fitted into the receiving hole n, so that the fitting of the vertically divided fitting portion is firmly maintained. .

Since the assembling folding shelf using the pipe joint according to the present invention is assembled using the pipe joint having a rotating structure as described above, the pipe member in the depth direction is different from the pipe member in the frontage direction. It is bendable, and the pipe joint is integrally formed so that a plurality of pipe fittings intersect at a right angle at the base in a state of being displaced by 45 degrees with respect to the base, along the cutting surface of the pipe fitting. The square pipe is inserted, and the square pipe member is rotated 45 degrees using an instrument such as a wrench to press and join the plane of the inner wall of the square pipe to the joint surfaces 22 and 32 so that the shelf made of the square pipe can be folded. It is a configuration to assemble.

In addition, concave portions 41a and 41b are provided in the plane portion of the support portion extending in the depth direction, and a cylindrical concave portion is provided at a position corresponding to the concave portion of the support portion at the base of the pipe fitting portion divided into two. It is also possible to provide 43 or convex portions 45. A coil spring 49 and a pin 47 having a bearing or a hemispherical tip are buried in a recess formed at the base of the fitting portion at a right angle so that the tip of the bearing 47 or the pin fits into the recess of the flat portion. I do. Since the coil spring presses the hemispherical tip of the bearing or pin at the tip, the hemispherical tip of the bearing or pin press-fits into the recess at the position of the recess 41a of the support portion, and the rotation is fixed. As a result, the square pipe forming the shelf, which has been unstable in the past, can be stopped accurately at a right angle. When the shelf is folded, a hemispherical tip of the bearing 47 or the pin fitted into the concave portion 41a of the support portion moves and separates from the concave portion by applying a force against the pressing of the coil spring 47. The whole is folded and rotatable. Further, it is also possible to adopt a configuration in which a low semicircular convex portion 45 having a shape corresponding to the concave portion 41b is protruded from the flat portion of the support portion at a position corresponding to the concave portion at the base of the base portion of the fitting portion. The structure that fits into the recess of the support part,
Whether the combination of the cylindrical concave portion 47, the coil spring 49, and the bearing 47, the semicircular convex portion 45, or both of them can be appropriately selected.

In this type of conventional pipe joint, as shown in FIG. 4, screwing from the outside was required to rotate the fitting portion. Although there was a problem such as loosening or falling off during long-term use during the movement, the assembly of the folding shelf pipe joint of the present invention has a beautiful appearance because no screws are visible outside as shown in FIG. In addition, despite the rotatable configuration, there is no problem such as loosening or falling off.

[0018]

The pipe joint according to the present invention has the following effects since it has the above-described structure. (1) Since the pipe joint is engaged by a dowel without using a screw, the appearance is beautiful, and it can withstand transportation and long-term use, and there is no risk of rattling or loosening or falling off of the screw. (2) The pipe joint is configured to be rotatable in the depth direction, and can be easily folded laterally so as to be shifted laterally when transported or transported or when unnecessary. (3) Since the protrusion and the recess are provided at positions corresponding to the base of the rotating fitting portion and the support portion extending from the base portion of the fitting, the fitting portion is fitted. Are fitted statically at a right angle position, whereby the square pipe member constituting the shelf can easily be stopped at the right angle position.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the entirety of a pipe joint for an assembly-type folding shelf according to the present invention.

FIG. 2 is a sectional view of a pipe joint for an assembling folding shelf according to the present invention.

FIG. 3 is a plan view of a conventional joint for a folding shelf.

FIG. 4 is a plan view of a conventional pipe joint for a folding shelf that is displaced by 45 degrees.

FIG. 5 is a plan view of a pipe joint for an assembly-type folding shelf according to the present invention.

[Explanation of symbols]

 1: pipe joint 3: base 10, 20, 30: fitting portion 21, 31: cutting surface of pipe fitting portion 22, 32: joining surface of fitting portion 30a, 30b: fitting portion 30c, 30d: root portion of fitting portion 30e , 30f: abutment surface 33: support portion 35: shaft hole 37, m: dowel 39: bearing hole n: receiving hole 41a, 41b, 43 ,: concave portion 43: cylindrical concave portion 45: semicircular convex portion 47: bearing 49: Coil spring

Claims (3)

(57) [Claims] 1. A pipe joint of a folding pipe shelf having a structure in which a pipe member in a depth direction can be bent with respect to a pipe member in a frontage direction, wherein a plurality of pipe fitting portions intersect at right angles from a base portion to a tip portion in a depth direction. A support portion formed in a semicircular shape is extended, and a shaft hole serving as a fulcrum of rotation is drilled at the center thereof, and a pipe fitting portion in the depth direction is divided into two vertically and a surface that contacts the base portion is formed. The dowel is formed in an arc shape, and a dowel serving as a rotation axis is protrudingly provided at the base of one pipe fitting portion, and a bearing hole into which the dowel is fitted is formed at the base of the other pipe fitting portion. Characterized in that it is rotatably engaged with a shaft hole of a support portion extending from a base portion. 2. A pipe joint for a display shelf having a structure in which the pipe member in the depth direction can be bent with respect to the pipe member in the frontage direction, a plurality of pipe fitting portions are integrally formed so as to intersect at right angles at a base portion. The square pipe member is fitted into the pipe fitting portion of the fitted pipe fitting in a state of being displaced by 45 degrees, and after fitting, the square pipe is rotated by 45 degrees with a wrench and fixed to the pipe fitting portion. The pipe joint for an assembly type folding shelf according to claim 1. 3. The support portion extending in the depth direction of the base portion has a hemispherical concave portion in a plane portion thereof, and a base portion of a pipe fitting portion divided into two is located at a position corresponding to the concave portion of the support portion. A cylindrical concave portion is provided to embed a coil spring and a bearing or a pin having a hemispherical tip, or a low semispherical convex portion is protruded at a position corresponding to the concave portion of the support portion, and 2. A mechanism for stopping rotation of the fitting portion such that a tip of a bearing or a pin or a semicircular convex portion fits into a concave portion of the support portion at a position where the fitting portion is at a right angle. Pipe fitting for assembling folding shelf described