JP2006077795A - Angular pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection joint for detachably bolt-connecting angular pipes to each other in an L- or T-shape when assembling and constructing shelf frames using the angular pipes. <P>SOLUTION: The joint for connecting the angular pipes in a frontal T-shape comprises connection angularly cylindrical portions to be fitted into the angular pipes, protruded in a frontal T-shape ranging both rightward and leftward and upward from an angular cylindrical base bottom portion, and stepped abutting portions formed on both frontal sides of a connection portion between the angularly cylindrical base bottom portion and each connection angular cylindrical portion for receiving both side end faces of the angular pipes to be fitted to the connection angularly cylindrical portions. Hexagonal holes are opened in the connection angularly cylindrical portions in the frontal direction. Hexagonal nuts almost the same in shape are fitted to the hexagonal holes. Thus, the angular pipes are bolt-joined to the connection angularly cylindrical portions, respectively. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a square pipe joint for connecting a square pipe to a plane L shape or a T shape.

  Conventionally, various types of joints or connecting members for connecting a square pipe or the like to, for example, an L-shape are known, but those that connect a square pipe in a detachable manner easily and freely have not been known.

Japanese Patent Laid-Open No. 7-208416 JP 2002-57477 A JP 2003-247516 A

  An object of the present invention is to provide a connecting joint that can connect square pipes that can be detachably connected by bolting to a plane L type or T type when assembling and building a shelf frame or the like using square pipes.

  In the present invention, a connecting square tube portion for fitting into a square pipe is provided in a front T-shape projecting from the square tubular base portion to both the left and right lateral directions and the upward direction, and the square tubular base portion and each connection are provided. Stepped abutting portions for receiving both side end surfaces of the square pipes fitted to the respective connecting square tube portions are formed on both front sides of the connecting portion with the connecting square tube portions, respectively. The hexagonal holes are made transparent from the front direction, and hexagonal nuts of approximately the same shape are fitted into these hexagonal holes, respectively, so that the square pipe can be bolted to each connecting square tube part. The present invention relates to a joint for connecting a square pipe characterized by the above to a plane T type.

  Further, in the present invention, a connecting square tube portion for inserting a square pipe is provided in a front L-shape projecting in the lateral direction and the upward direction on either the left or right side of the rectangular tubular base portion, Stepped abutting portions for receiving the end faces of the square pipes fitted to the respective connecting square tube portions are formed on both sides of the front portion of the connecting portion with the square tubular base portion. The hexagonal holes are made transparent from the front direction, and hexagonal nuts of approximately the same shape are fitted into these hexagonal holes, respectively, so that the square pipe can be bolted to each connecting square tube part. The present invention relates to a joint for connecting a square pipe having a flat L shape.

  Further, in the present invention, a hexagonal hole is formed through the front center portion of the upward connecting rectangular tube portion, and a hexagonal nut of the same shape is fitted into the hexagonal hole. The projecting length is about twice the projecting length of the upward connecting square tube, and a hexagonal hole is formed in the front center of the inner half of the lateral connecting tube. This relates to a joint for fitting a hexagonal nut.

  In addition, the present invention provides a lightweight structure by piercing the outer half of the rectangular tube base portion and the lateral connection square tube portion to the respective outer shapes of the base portion and the outer half portion from the front. Related to joints.

  In the present invention, the hexagonal through hole and the joint having a through-hole in the above shape are extruded from the front shape of aluminum or an aluminum alloy and cut into a desired thickness in the extrusion direction. It relates to joints fitted with steel nuts of the same shape.

  The present invention also relates to a method for connecting square pipes in which three or two square pipes are connected to the front T-type or L-type using one square pipe joint.

  In the joint of the present invention, the connecting square tube part of the block metal fitting is inserted into the end face opening of the square pipe to be connected, and the square pipe is attached to the nut fitted to the connecting square tube part at a position close to the inserting end surface of the fitting square pipe. Screws the bolt with the head engaged through a washer, etc., and the square pipe wall surface is tightened and clamped between the joint surface and the bolt head to removably connect the fitting to the square pipe. Therefore, the connection operation can be performed easily and quickly, and the connection strength is excellent.

  In addition, because it has a multi-wall structure with multiple independent cutouts formed over the entire surface excluding the nut fittings of the joint block metal fittings, it is lightweight and has excellent strength as a joint. When manufactured, the effect is remarkable.

  Further, when the block metal fitting is made of aluminum, a long aluminum mold having a cross section of the front shape is extruded and cut into a predetermined thickness, so that the joint according to the present invention can be produced at low cost and in large quantities. .

  In the following, a joint for connecting aluminum square pipes to each other will be described with reference to the drawings, with the block metal fitting of the joint of the present invention made of aluminum, but the present invention is not limited to this.

FIG. 1 shows an aluminum joint for connecting an aluminum square pipe to a plane T shape, and a square pipe (P ₁₎ to be connected from the rectangular tube base (A) to both the left and right lateral directions and upward. ) (P ₂ ) (P ₃ ) Connecting rectangular tube portions (B), (B ′) and (C) for fitting into the front T-shape are connected to the rectangular tube base (A). Stepped abutting portions for receiving the front end faces of the square pipes (P ₁ ) (P ₂ ) (P ₃ ) on both sides of the front of the connecting portion with the rectangular tube portions (B), (B), and (C) 1) (1 ′) is formed, and hexagonal holes (2) are formed through these square tube portions (B), (B ′), and (C) from the front direction, respectively, and these hexagonal holes (2 ) Is fitted with a substantially hexagonal nut (3) made of steel.
(4) indicates a screw hole of the nut (3).
The rectangular base (A) is hollowed with a rectangular cavity (5) that matches the outer shape (horizontal rectangle).
The rectangular tube portion (C) has a protruding length (in the drawing, a substantially square shape) through which a hexagonal hole (2) can be formed in the center, but the rectangular tube portions (B) and (B ′) are rectangular tube portions. The projecting length is approximately twice the projecting length of (C), and hexagonal holes (2) are provided in the center of the front of the inner half of the rectangular tube sections (B) and (B ′), respectively. A square cavity (6) having the same outer shape as the outer half of the cylindrical portions (B) and (B ′) is cut out.
The joint is made by extruding aluminum or an aluminum alloy with the front shape as the extrusion surface, cutting it to a desired thickness in the extrusion direction, and press fitting a substantially identical steel nut into the hexagonal through hole.

FIG. 2 illustrates a method of connecting the pipes (P ₁ ) (P ₂ ) (P ₃ ) and the joint of the present invention. As shown in FIG. 1, the pipes (P ₃ ) fitted to the rectangular tube portion (C) are illustrated. ) Is fastened to the joint by a bolt (8) screwed into the screw hole (4) from the outside through a hole (7) previously formed in the pipe (P ₃ ).
(9) is the head of the bolt (8), (10) is a washer, and (11) is a spring washer.
Thus, the pipe (P ₃ ) is firmly clamped and fixed between the bolt head (9) and the embedded nut (3) of the rectangular tube portion (C).

FIG. 3 shows a joint for connecting a square pipe to the front L shape, and a hexagonal hole (2) is formed through the center of the front of the upward connecting square tube portion (D). A hexagonal nut (3) is fitted, and the protruding length of the connecting square tube portion (E) in the lateral direction is approximately twice the protruding length of the upward rectangular tube portion (D), and the inner half portion thereof A hexagonal hole (2) is formed in the center of the front surface of the, and a substantially identical hexagonal nut (3) is fitted thereto.
A hollow (6) having the same shape is opened from the front in the outer half of the rectangular tube (D).
(1) and (1 ′) are stepped abutting portions for receiving both front end surfaces of the square pipes (P ₄ ) and (P ₅ ) to be connected.
(5) shows the same-shaped cavity opened in the rectangular tube base (A).
Production of the joint and connection of the square pipes (P ₄ ) (P ₅ ) using the joint are performed in the same manner as in the first embodiment.

The top view which shows the usage condition of the coupling metal fitting of Example 1. Explanatory drawing showing the connection with the pipe The top view which shows the usage condition of the coupling metal fitting of Example 2.

Explanation of symbols

A ...... rectangular tube base portion B, B '...... connecting rectangular tube C ...... connecting rectangular tube D ...... connecting rectangular tube E ...... connecting rectangular tube P ₁ to P ₅ ...... Square pipe 1, 1 '... Stepped contact 2 ... Hexagonal hole 3 ... Hexagonal nut 4 ... Screw hole 5 ... Cavity 6 ... Cavity 7 ... Pipe hole 8 ... Bolt 9 ... Bolt head 10 ... Washer 11 ... Spring washer

Claims (5)

  A connecting square tube portion for fitting into a square pipe is projected in a front T-shape from the rectangular tubular base portion in both the left and right lateral directions and upward, and the square tubular base portion and each connecting square tube are projected. Stepped abutting parts are formed on both sides of the front of the connecting part to each other to receive both end faces of the square pipes fitted to each connecting square tube part. The hexagonal holes are made transparent, and the hexagonal nuts of substantially the same shape are fitted into the hexagonal holes, respectively, and the square pipes can be bolted to the respective connecting rectangular tube portions. A joint for connecting a characteristic square pipe to a flat T-shape.   A connecting square tube portion for inserting a square pipe is provided in a front L-shape projecting in the lateral direction or the upward direction on either the left or right side of the square tubular base portion, and each connecting square tube portion and the rectangular tubular base portion are provided. Stepped abutting portions for receiving the end faces of the square pipes fitted to the connecting square tube portions are respectively formed on both sides of the front of the connecting portion with the connecting portion. Each hexagonal hole is made transparent, and a hexagonal nut of approximately the same shape is fitted into each hexagonal hole so that the square pipe can be bolted to each connecting square tube portion. A joint for connecting the square pipe to the plane L shape.   A hexagonal hole is formed in the center of the front of the upper connecting square tube portion, and a hexagonal nut of the same shape is fitted into the hexagonal hole, and the protruding length of the horizontal connecting square tube portion is set upward. The projecting length of the connecting square tube portion is about twice as long, and a hexagonal hole is formed through the front half of the inner half of the horizontal connecting square tube portion. The joint according to claim 1 or 2, which is fitted.   From the front surface, a cavity corresponding to each outer shape of the base part and the outer half part is made transparent in the outer half part of the rectangular tubular base part and the lateral connection square tube part from the front to form a light weight structure. The joint according to any one of 3 to 3.   Aluminum or an aluminum alloy is extruded using the front shape of the joint having hexagonal through holes and through-holes as the extrusion surface, and cut to a desired thickness in the extrusion direction. The joint according to any one of claims 1 to 4, wherein:

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