JP2010025190A - Square pipe joint structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a square pipe joint structure capable of easily connecting and fixing a joint in a square pipe with excellent work efficiency, capable of suppressing the weight of the joint part, and capable of achieving a light weight structure without having influence on the structure design even in a heavy construction, and excellent in work efficiency and reliability. <P>SOLUTION: In the joint structure of the square pipe for coupling and fixing the square pipe by an insertion way, the joint part comprises a square pipe having the same diameter, and drawing work is executed to an insertion part as the connecting part corresponding to the thickness, and the square pipe is inserted into the insertion part to which drawing work is executed, and is fixed, and is jointed. The square pipe is the basic shaft stake coupled by the joint structure. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a square pipe joint structure for connecting and fixing a square pipe and a square pipe.

  As a conventional square pipe joint structure, when a square steel pipe (square pipe) or the like is used as a structure (framework), it can be joined by welding or fixed with screws using an L-shaped bracket or an insertion bracket. Mainstream.

Further, in Japanese Patent Application Laid-Open No. 2003-49814, a quadrangular concave portion 2 is formed in each surface 1 ′ of the hexahedron 1, and a female screw hole 3 facing the inside of the hexahedron 1 is formed in each concave portion 2. The main body block 4 is formed, and a quadrangular convex portion 5 that fits into the quadrangular concave portion 2 is formed on the outer surface 6 ′ of one end portion of the hollow arm block 6, and a through hole that matches the screw hole 3 at the one end portion. 7, a bolt head 8 ′ is rotatably engaged with the inner surface 6 a at one end, and a bolt 8 that is screwed into the screw hole 3 through the through hole 7. A joint structure in which the outer periphery 4 sides 6 '' are arranged in parallel on the inside of the 4 sides 1 "with an interval r, and the main body block 4, the hollow arm block 6 and the bolt 8 are formed so as to be disassembled and assembled. Is disclosed.
JP 2003-49814 A

  In the conventional square pipe joint structure, when welding is performed in the field, there are many cases where the welding work is difficult, and there is a problem in workability.

  In addition, since the L-type bracket, the insertion bracket, and the like are bolted, workability is better than welding, but the material cost and transport cost of a strong and sturdy bracket are increased, and the weight is also increased.

  In the above Japanese Patent Application Laid-Open No. 2003-49814, the main body block and the hollow arm block are fixed with bolts 8 and the joint portion is heavy, and it seems effective for lightweight objects such as furniture and tables. A heavy object such as a structure is not suitable because the weight of the joint is too heavy.

  The present invention has been made to solve such a problem, and the purpose thereof is to easily connect and fix the joint in the square pipe with good workability, and to suppress the weight of the joint portion, in a heavy structure. Another object of the present invention is to provide a square pipe joint structure that can realize a lightweight structure that does not affect the structural design, has good workability, and is highly reliable.

  In order to solve the above-described problem, in claim 1 of the present invention, in a joint structure of a square pipe in which a square pipe is connected and fixed in a plug-in manner, the joint portion is a square pipe of the same diameter, The insertion part is made into a square pipe joint structure characterized by being subjected to drawing processing for the plate thickness, and being joined by inserting and fixing a square pipe into the drawn insertion part. It is.

  The square pipe can be drawn using Utility Model No. 2120022 (square pipe drawing device) of the present applicant. For drawing, it is preferable to draw a portion corresponding to the thickness of the connecting portion of the tip of the square pipe of the same diameter as the other square pipe to be connected. It is preferable that no step occurs on the outer surface after connection.

  According to a second aspect of the present invention, the square pipe joint structure is characterized in that a liner pipe for bolting is provided inside the square pipe of the insertion portion.

  The liner pipe is for preventing the square pipe from being deformed by tightening the bolt at the time of connection and maintaining accuracy, and is a pipe material having an inner diameter larger than the diameter of the bolt to be used. Any one can be used as long as it can withstand.

  Moreover, in Claim 3 of this invention, a square pipe is made into the foundation axial pile characterized by being connected by the said joint structure.

  The foundation pile is usually cylindrical, but in the present invention, a square pipe is used by connecting the square pipe and injecting concrete milk into the square pipe and solidifying it.

  By making the cross-sectional shape a quadrangle, it is possible to dramatically increase the strength against the problem of weakness in lateral force, which is a problem of cylindrical piles. Unprecedented horizontal piles can be realized.

  The square pipe joint structure of the present invention has the following effects.

  1) Connection work is easy and workability is high.

  2) Square pipes can be connected to each other without requiring a special joint member.

  3) Since the shape of the connecting portion is a fitting type by high-precision drawing, there is no backlash or blurring, and the connection can be made with high accuracy, so that distortion and displacement after connection are less likely to occur, and reliability and safety are high.

  4) The connecting member only draws the square pipe itself, and does not use a bracket material for connection. Therefore, the connecting member is light in weight and suitable for reducing the weight of the heavy structure.

  5) Since the drawing process corresponding to the plate thickness does not cause a step on the outer surface and the joint member is not exposed, the appearance is good.

  6) Since it is an insertion joint, it can be easily connected, and a highly accurate and reliable joint structure can be realized.

  7) By using the joint structure of the foundation shaft pile, it is possible to realize a prismatic pile having a high transverse strength and a square cross section.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a view showing an embodiment of a square pipe corner joint using the joint structure of the present invention.

  This joint structure is a multi-directional joint for connecting six-direction square pipes, and can easily connect upper, lower, front and rear, and left and right square pipes.

  The joint portion 1 has a joint portion 1a on the tip side of a square pipe projecting in six directions drawn by a drawing device by an amount corresponding to the plate thickness, and a bolt 2 for fixing is attached to the drawn portion 1a which is the joint portion. A through hole 3 for insertion is provided. Further, a liner pipe 4 is provided in the through hole 3 portion inside the joint 1a of the joint. The liner pipe 4 supports the square pipe so that it is not deformed when tightened with bolts and nuts. A liner pipe 4 is provided in each through hole 3.

  By inserting the square pipe 5 connected to the coupling portion 1a of the multidirectional joint 1 and fixing it with the nut 7 through the bolt 2 into the through hole 6, the square pipe can be firmly coupled.

  In addition, since the joint portion is made of only a square pipe, no special instrument or bracket is required, and the joint portion is lightweight and effective as a framework for a heavy structure. Moreover, it is a plug-in type, has high accuracy, has no connecting bracket, etc., and has a good appearance design.

  FIG. 2 is a diagram showing an embodiment of a square pipe L-type joint using the joint structure of the present invention. As in FIG. 1, the joint portion 10 has one of the connecting portions 10a squeezed by an amount corresponding to the plate thickness, the other connecting portion 10b remains as it is, and the tip end portion 11a of the square pipe 11 to be connected is a plate. It has been drawn by the thickness equivalent. Reference numeral 12 denotes a reinforcing rib.

  FIG. 3 is a view showing an embodiment of a square pipe T-type joint using the joint structure of the present invention. As in FIG. 1, the joint portion 20 is drawn at the front end side of the connecting portions 20 a and 20 b in the two horizontal directions corresponding to the plate thickness, and the connecting portion 20 b in the vertical direction is not drawn. The front end portion 21a of the square pipe 21 to be joined is drawn by an amount corresponding to the plate thickness.

  FIG. 4 is a view showing an embodiment of a square pipe cross joint using the joint structure of the present invention. As in FIG. 1, the joint portion 30 is formed by drawing the four-direction connecting portions 30 a corresponding to the plate thickness. 31 is a liner pipe.

  FIG. 5 is a view showing an embodiment of a square pipe prefabricated steel frame using the joint structure of the present invention. As in FIG. 1, the steel joint portion 40 is drawn on one side by an amount corresponding to the plate thickness, and the other side 40b is left as it is and can be connected in a plug-in manner.

  FIG. 6 is a view showing an embodiment of a square pipe intermediate beam joint using the joint structure of the present invention. The intermediate beam is installed across the U-shaped member 50, and the connecting portion 51 of the square pipe has the drawing portion of the connecting portion 51 a corresponding to the plate thickness as in FIG. Insert and fix with bolts.

  FIG. 7 is a view showing an embodiment of a corner pipe three-way corner joint using the joint structure of the present invention. As in FIG. 1, the joint portion 60 is drawn by a portion corresponding to the thickness of the joint portion 60 a in the two horizontal directions, and the joint portion 60 a of the square pipe 61 to be coupled is left as it is, with the joint portion 60 b in the vertical direction remaining unchanged. Are drawn by the amount corresponding to the plate thickness, which are inserted and connected and fixed with bolts and nuts.

  FIG. 8 is a view showing an embodiment of a foundation shaft pile using the joint structure of the present invention. In the joint structure of the pile, as in FIG. 1, the upper end portion 70a of the square pipe pile 70 has been drawn by an amount corresponding to the plate thickness, and the lower end portion 70b is left as it is (not drawn). When the pile is driven, the next square pipe pile is fitted from above and fixed with bolts 71 and nuts 72. After pile driving, concrete is poured into the square pipe to make a concrete pile.

  Thus, according to the present invention, it is easy to connect the square pipes, and since it is only inserted and bolted, workability is good, no special member such as a bracket is required, light weight, easy to carry, and weight. The weight of the structure frame can be reduced.

It is a figure which shows the Example of the square pipe corner joint using the joint structure of this invention. It is a figure which shows the Example of the square pipe L-type joint using the joint structure of this invention. It is a figure which shows the Example of the square pipe T-type joint using the joint structure of this invention. It is a figure which shows the Example of the square pipe cross joint using the joint structure of this invention. It is a figure which shows the Example of the square pipe prefabricated steel frame using the joint structure of this invention. It is a figure which shows the Example of the square pipe intermediate beam joint using the joint structure of this invention. It is a figure which shows the Example of the square pipe 3 direction corner joint using the joint structure of this invention. It is a figure which shows the Example of the foundation shaft pile using the joint structure of this invention.

Explanation of symbols

1, 10, 20, 30, 40, 50, 60 Joint part 1a, 10a, 20a, 20b, 30a, 40a, 40b, 50a, 60a, 60b Joint part 2, 71 Bolt 3, 6 Through hole 4 Liner pipe 5, 11 Square pipe to be connected 7, 72 Nut
70 Square pipe pile 70a Upper end of square pipe pile 70b Lower end of square pipe pile

Claims (3)

In the joint structure of square pipes that connect and fix square pipes in a plug-in type,
The joint part consists of square pipes of the same diameter, and the insertion part that is the connecting part is subjected to drawing processing for the plate thickness, and by inserting and fixing the square pipe into the drawn insertion part Square pipe joint structure characterized by being jointed. The square pipe joint structure according to claim 1, wherein a liner pipe for bolting is provided inside the square pipe of the insertion portion. A foundation shaft pile in which square pipes are connected by the joint structure according to claim 1 or 2.