JP2019027480A - Joint, joined body and joining method - Google Patents

Abstract

To provide a joint capable of efficiently performing a joining operation of various kinds of rod-like bodies such as steel pipe and pile.SOLUTION: A joint 10X for joining a set of rod-like bodies 20A, 20B which respectively have opening parts 24A, 24B opened to the outer circumferential side of flange parts 21A, 21B having circular contour is provided. The joint 10X includes a connection unit 11 which connects a set of flange parts while flange parts of a set of rod-like bodies are abutted on each other and a fixing unit 12 which fixes the connection unit to the set of rod-like bodies by fastening the connection unit from the outer circumferential side. The connection unit 11 includes a plurality of connection members 11a arranged in a circumferential direction on the outer circumferential side of the set of flange parts and each of the plurality of connection members includes a pinching part 11bb arranged so as to pinch the set of flange parts from both sides of axial directions of the set of rod-like bodies and a projection part 11c projected from the pinching part so as to be inserted to an insertion part 25 formed by combining the opening parts of the sets of flange parts with each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a joint for joining various rod-like bodies such as steel pipes and piles, a joined body joined by the joint, and a method for joining the rod-like bodies by the joint.

  Patent Document 1 describes providing a mechanical joint capable of efficiently and quickly performing a steel pipe connection operation at a construction site. Therefore, in patent document 1, in the state which faced | matched a pair of protrusion part which each was provided in the edge part of two steel pipes and protruded outside rather than the outer peripheral surface of a steel pipe, and the edge parts of two steel pipes were faced | matched A plurality of connecting members mounted from the outside of the protrusions and formed with grooves for receiving the pair of protrusions on the inner peripheral surface, and a cylinder mounted outside the plurality of connection members mounted on the pair of protrusions A steel pipe joint structure is described, characterized in that it comprises a shaped fixing member.

JP 2009-270429 A (summary)

  The present invention provides a joint capable of efficiently carrying out joining work of various rod-like bodies such as steel pipes and piles.

  One embodiment of the present invention is a joint that joins a pair of rod-like bodies each having an opening that opens to the outer peripheral side of a flange portion having a circular outer shape. This joint includes a connection unit that connects a pair of flange portions in a state in which the flange portions of a pair of rod-shaped bodies are butted together, and a fixing unit that is fixed to the set of rod-shaped bodies by tightening the connection unit from the outer peripheral side. including. The connection unit includes a plurality of connection members arranged circumferentially on the outer peripheral side of the set of flange portions, and each of the plurality of connection members is a set of flange portions from both sides in the axial direction of the set of rod-shaped bodies. And a projecting portion protruding from the sandwiching portion so as to be inserted into the insertion portion formed by combining the openings of the pair of flange portions.

  In this joint, the flange portions of a pair of rod-shaped bodies are butted together, and the opening portions are combined to form an insertion portion so that the sandwiching portions of the connection members sandwich the pair of flange portions. When the protruding portion is inserted into the inserting portion, the protruding portion is caught by the inserting portion, so that it is easy to maintain the temporarily fixed state in which the sandwiching portion is disposed so as to sandwich the pair of flange portions. Therefore, it is possible to efficiently perform the tightening operation by the fixing unit from the outer peripheral side to each connection member temporarily fixed in the circumferential direction of the set of flange portions. As a result, each connecting member is fastened and fixed to a set of rod-like bodies in a state where the sandwiching portions are arranged so as to sandwich the set of flange portions, so that the set of rod-like bodies is pulled apart in the axial direction. Can be prevented. Furthermore, when the protruding portion of each connecting member is inserted into the insertion portion, the rotational torque of one rod-shaped body can be transmitted to the other rod-shaped body via the protruding portion.

  The insertion portion may be a square shape or a circular shape, but when the insertion portion is a quadrangular shape, the protruding portion preferably includes a square columnar portion formed so as to be inserted along the insertion portion. . By inserting the quadrangular columnar portion along the quadrangular insertion portion, it is easy to further stabilize the temporarily fixed state of each connecting member, and to improve the transmission efficiency of the rotational torque.

  When the insertion portion has a rhombus shape having a diagonal line perpendicular to the axial direction, the quadrangular columnar portion preferably includes a rhomboid columnar portion formed so as to be inserted along the insertion portion. By inserting a rhombus columnar section along a rhombus-shaped insertion section having a diagonal line perpendicular to the axial direction, the direction in which the rotational torque is transmitted, that is, the cross section in the shear direction can be increased, thereby improving the shear resistance. Cheap.

  Preferably, the plurality of connecting members each include a split male screw portion that is combined in the circumferential direction to form a male screw portion, and the fixing unit includes a female screw portion that can be fastened to the male screw portion. Since each connection member is temporarily fixed in the circumferential direction of a set of flange portions, it is easy to form a male screw portion in the circumferential direction by combining the divided male screw portions of each connection member. Therefore, the female screw portion of the fixed unit can be simply and efficiently screwed to the male screw portions of the plurality of temporarily joined joining members.

  The flange portion is formed continuously in the circumferential direction, and the opening is preferably a groove shape cut out from the outer peripheral surface of the flange portion. The flange portion may be formed intermittently in the circumferential direction. In this case, the opening portion only needs to be opened on the outer peripheral side of the flange portion, but the flange portion is continuously formed in the circumferential direction. Then, by notching the groove-shaped opening in the flange portion itself, the axial force acting on the set of rod-shaped bodies can be borne on the entire circumference of the flange portion.

  Another aspect of the present invention is a joined body including the joint and a set of rod-like bodies joined by the joint.

  Yet another embodiment of the present invention is a joining method for joining a set of rod-like bodies by joints. Each of the set of rod-shaped bodies includes a flange portion having a circular outer shape and an opening portion opened to the outer peripheral side of the flange portion, and the joint is in a state where the flange portions of the pair of rod-shaped bodies are in contact with each other. The connection unit includes a plurality of connection members arranged circumferentially on the outer peripheral side of the set of flange portions, and each of the plurality of connection members includes a set of flanges. Including a protruding portion that protrudes so as to be inserted into an insertion portion that is formed by combining the openings of the portion, and the joining method includes inserting each of the plurality of connecting members into the insertion portion by inserting the protruding portion into the insertion portion. Including temporarily fixing the flange portion of the set.

  It is possible to provide a joint that can efficiently perform the joining work of various rod-shaped bodies such as steel pipes and piles.

The connection body using the connection unit which is the 1st Embodiment of this invention is shown, (a) is a perspective view, (b) is a cross-sectional perspective view, (c) is a cc arrow line view, (d) is a perspective view. dd sectional drawing. The disassembled perspective view of the connection body shown in FIG. The figure which shows the method of connecting two rod-shaped bodies using the connection unit shown in FIG. The connection body using the connection unit which is the 2nd Embodiment of this invention is shown, (a) is a perspective view, (b) is a cross-sectional perspective view, (c) is a cc arrow line view, (d) is a perspective view. dd sectional drawing. The connection body using the connection unit which is the 3rd Embodiment of this invention is shown, (a) is a perspective view, (b) is a cross-sectional perspective view, (c) is a cc arrow line view, (d) is a perspective view. dd sectional drawing.

(First embodiment)
FIG. 1 shows a joined body 100 using a joint 10X according to the first embodiment of the present invention, where (a) is a perspective view, (b) is a sectional perspective view, and (c) is c. -C arrow line view, (d) is dd sectional drawing. FIG. 2 is an exploded perspective view of the joined body 100.

  The joined body 100 includes a joint 10X and a pair of rod-like bodies 20A and 20B joined by the joint 10X. In this embodiment, the rod-like bodies 20A and 20B are steel pipes whose outer shapes are circular, and these steel pipes are joined by a joint 10X to form a steel pipe pile.

  Ring-shaped end plates 21A and 21B having a circular outer shape are attached as flange portions to the upper end of one steel pipe 20A disposed below and the lower end of the other steel pipe 20B disposed above, respectively. In this embodiment, the end plates 21A and 21B are attached to the ends of the steel pipes 20A and 20B by welding, respectively. In addition, 22 in a figure is a backing ring at the time of welding.

  The outer diameters of the end plates 21A and 21B are larger than the outer diameters of the steel pipes 20A and 20B, and the inner diameters of the end plates 21A and 21B are smaller than the inner diameters of the steel pipes 20A and 20B. Therefore, when the end plates 21A and 21B are attached to the end portions of the steel pipes 20A and 20B, the outer peripheral side portions of the end plates 21A and 21B become flange protrusions 23A and 23B that protrude outward from the outer peripheral surface of the steel pipes 20A and 20B. , Constituting a part of the flange portion. That is, in this embodiment, the end plates 21A and 21B form a set of flange portions 21A and 21B, and the set of flange portions 21A and 21B are continuously formed in the circumferential direction.

  The pair of flange portions 21A and 21B have openings 24A and 24B that are open on the outer peripheral side thereof. In this embodiment, the opening portions 24A and 24B extend from the outer peripheral surfaces of the flange portions 21A and 21B toward the center portion of the steel pipes 20A and 20B (the center portion in the cross section perpendicular to the axial direction of the steel pipes 20A and 20B). It has a groove shape cut out. In this embodiment, three openings 24A and 24B are provided at equal intervals along the circumferential direction of the flanges 21A and 21B of the steel pipes 20A and 20B, and the openings 24A and 24B are equal. It has an opening width (groove width) and is formed horizontally toward the center of the steel pipes 20A and 20B. And the opening parts 24A and 24B form a rectangular-shaped (square or rectangular shape in this embodiment) insertion part 25 in a state where the flange parts 21A and 21B are abutted with each other. The number of openings 24A and 24B is not limited to three, but may be two or four, and can be set to a necessary number according to the magnitude of the rotational torque to be transmitted.

  The joint 10X that joins the steel pipes 20A and 20B includes a connection unit 11 that connects the pair of flange parts 21A and 21B in a state where the flange parts 21A and 21B of the pair of steel pipes 20A and 20B face each other, and the connection unit 11 And a fixing unit 12 that is fixed to the pair of steel pipes 20A and 20B by tightening from the outer peripheral side.

  There are a plurality of connection units 11 arranged in the circumferential direction on the outer peripheral side of the pair of flange portions 21A and 21B (in this embodiment, there are three, but the number is not limited to this, for example, the number of openings 24A and 24B) 2 or 4 in total) may be included. Each connecting member 11a has an arc shape along the outer shape of the pair of flange portions 21A and 21B, and in a state where the flange portions 21A and 21B are abutted against each other on the inner peripheral side, the pair of steel pipes 20A and 20A, A sandwiching portion 11b is disposed so as to sandwich the pair of flange portions 21A and 21B from both sides in the axial direction of 20B, and a projecting portion 11c projecting from the sandwiching portion 11b. The projecting portion 11c includes a quadrangular columnar portion 11d so as to be inserted along a quadrangular insertion portion 25 formed by combining the openings 24A and 24B of the pair of flange portions 21A and 21B described above. . These connecting members 11a are mounted from the outer peripheral side of the pair of flange portions 21A and 21B and combined in the circumferential direction to form a substantially ring shape surrounding the set of flange portions 21A and 21B. In this embodiment, the outer peripheral surface of each connecting member 11a has a tapered shape that decreases in diameter toward the bottom, which is the penetration direction of the steel pipe pile 100, and a split male screw portion 11e is provided on the outer peripheral surface. Yes. These divided male screw portions 11e form male screw portions 11f when the connecting members 11 are combined in the circumferential direction.

  The fixing unit 12 is fixed to a pair of steel pipes 20A and 20B by mounting on the outer peripheral side of each connection member 11a (connection unit 11) constituting the above-described substantially ring shape, and tightening the connection unit 11 from the outer peripheral side. To do. In this embodiment, the fixing unit 12 has a cylindrical shape, and is fastened (screw-coupled) to the male screw portion 11f formed by combining the divided male screw portions 11e of the connection members 11 in the circumferential direction on the inner peripheral surface thereof. A possible female thread portion 12f is included. The inner peripheral surface of the fixed unit 12 has a tapered shape that decreases in diameter toward the bottom, which is the penetration direction of the steel pipe pile 100, like the outer peripheral surface of each connecting member 11a. The outer peripheral surface of the fixed unit 12 is also a steel pipe pile. It has a taper shape with a diameter decreasing toward the bottom which is 100 penetration directions.

  Next, a method for joining a pair of steel pipes 20A and 20B using the joint 10X will be described mainly with reference to FIG. 3A to 3F, the upper stage is a perspective view and the lower stage is a cross-sectional view.

  FIG. 3A shows the lower steel pipe 20A, but an end plate 21A is attached in advance as a flange portion to the end (upper end) of the lower steel pipe 20A (FIG. 3B). Although not shown in FIGS. 3A and 3B, the end plate 21B is also attached as a flange portion in advance to the end portion (lower end) of the upper steel pipe 20B. And when joining the upper steel pipe 20B to the lower steel pipe 20A, as shown in FIG.3 (b), the fixed unit 12 is arrange | positioned in the position surrounding the outer periphery of the lower steel pipe 20A. Although not shown in FIG. 3 (b), the fixed unit 12 is placed at the position shown in FIG. 3 (b), for example, by placing it on a temporary cradle installed on the outer peripheral side of the lower steel pipe 20A. Can do.

  Next, as shown in FIG.3 (c), flange part 21A, 21B of steel pipe 20A, 20B is faced | matched so that flange protrusion part 23A, 23B and opening part 24A, 24B may align. Thereby, the opening portions 24A and 24B are combined to form the rectangular insertion portion 25. Thereafter, as shown in FIGS. 3D and 3E, the sandwiching portions 11b of the connecting members 11a are in a state of sandwiching a pair of flange portions 21A and 21B (flange projecting portions 23A and 23B). The protruding portion 11 c is inserted into the insertion portion 25. Thus, by inserting the protruding portion 11c of each connection member 11a into the insertion portion 25, each connection member 11a is temporarily fixed in the circumferential direction of the flange portions 21A and 21B of the steel pipes 20A and 20B. That is, when the protruding portion 11c of the connecting member 11a is inserted into the inserting portion 25, the upper end of the protruding portion 11c hits the upper end of the inserting portion 25 even if the connecting member 11a tries to drop off due to its own weight. It is easy to maintain the temporarily fixed state arrange | positioned so that flange part 21A, 21B (flange protrusion part 23A, 23B) may be pinched | interposed. In other words, the length of the protrusion 11 c and the clearance between the protrusion 11 c and the insertion part 25 are designed so that the upper end of the protrusion 11 c is caught by the upper end of the insertion part 25.

  Finally, as shown in FIG. 3 (f), the fixed unit 12 is mounted on the outer peripheral side of the connection unit 11, and the connection unit 11 is tightened from the outer peripheral side, thereby connecting the connection unit 11 to a set of steel pipes 20A. , 20B. In this embodiment, the female screw portion 12f provided on the inner peripheral surface of the fixed unit 12 and the male screw portion 11f formed on the outer peripheral side of the connection unit 11 are fastened (screw-coupled). At this time, since each connection member 11a is temporarily fixed in the circumferential direction of the pair of flange portions 21A and 21B as described above, the male screw portion 11f is circumferentially combined by combining the divided male screw portions 11e of each connection member 11a. Easy to form. Therefore, the female screw portion 12f of the fixed unit 12 can be screw-coupled easily and efficiently to the male screw portion 11f of the plurality of temporarily joined joining members 11a.

  The fixing unit 12 can be mounted on the outer peripheral side of the connection unit 11 by pushing means other than screw connection, for example, the fixing unit 12 having a tapered surface, and the connection unit 11 can be tightened from the outer peripheral side. It is. Also in this case, since each connecting member 11a is temporarily fixed in the circumferential direction of the pair of flange portions 21A and 21B, the fixing unit 12 is tightened from the outer peripheral side to each temporarily fixed connecting member 11a. It can be done efficiently.

  Thus, the joined body (steel pipe pile) 100 shown in FIG. 1 is obtained. Although such a steel pipe pile may be penetrated into the ground while rotating around its axis, in this steel pipe pile 100, since the protruding part 11c is inserted into the insertion part 25, the protruding part 11c is Thus, the rotational torque of one steel pipe 20A can be transmitted to the other steel pipe 20B, and when the steel pipe pile 100 is actually penetrated into the ground, the rotational torque of the upper steel pipe 20B is reduced via the protrusion 11c. Can be transmitted to the steel pipe 20A. Further, since the pair of flange portions 21A and 21B are sandwiched by the sandwiching portion 11, the pair of steel pipes 20A and 20B can be prevented from being separated in the axial direction (vertical direction). Furthermore, when joining a set of steel pipes 20A and 20B using the joint 10X, the connection members 11a can be temporarily fixed in the circumferential direction of the set of flange portions 21A and 21B as described above. The fastening operation by the fixing unit 12 can be efficiently performed from the outer peripheral side to each stopped connection member 11a. Moreover, in this embodiment, since the protrusion part 11c contains the square columnar part 11d of the shape along the square-shaped insertion part 25, by inserting this square columnar part 11d along the square-shaped insertion part 25, It is easy to further stabilize the temporarily fixed state of each connection member 11a, and it is easy to improve the transmission efficiency of rotational torque. In addition, in this embodiment, since the outer peripheral surface of the fixed unit 12 has a tapered shape whose diameter is reduced toward the bottom, which is the penetration direction of the steel pipe pile 100, the fixed unit 12 is inserted when the steel pipe pile 100 penetrates into the ground. It is hard to come off and the resistance at the time of penetration can be reduced.

  In this embodiment, the outer peripheral surface of each connecting member 11a and the inner peripheral surface of the fixed unit 12 are each tapered so that the diameter decreases toward the penetration direction of the steel pipe pile 100. It can also be made into the taper shape which expands in diameter. As shown in FIG. 3, the taper shape that decreases in diameter needs to be attached to each connection member 11 a while lifting the fixing unit 12 upward. In this case, the fixed unit 12 can be mounted while being temporarily placed on each connection member 11a, so that the mounting operation of the fixed unit 12 becomes easy.

(Second Embodiment)
FIG. 4 shows a joined body 100 using a joint 10Y according to the second embodiment of the present invention, where (a) is a perspective view, (b) is a cross-sectional perspective view, and (c) is c. -C arrow line view, (d) is dd sectional drawing. The joint 10Y shown in FIG. 4 is substantially the same as the joint 10X shown in FIG. 1 except for the shapes of the openings 24A and 24B and the protrusion 11c. Therefore, in the joint 10Y shown in FIG. 4, the same reference numerals are given to substantially the same components as those of the joint 10X shown in FIG. 1, and the description thereof is omitted.

  In this joint 10Y, the openings 24A and 24B are in the shape of rhombus having diagonal lines perpendicular to the axial direction of the pair of steel pipes 20A and 20B in a state where the flange parts 21A and 21B of the pair of steel pipes 20A and 20B are butted together. The insertion part 25 is formed. Further, the protruding portion 11c (square columnar portion 11d) includes a rhomboid columnar portion 11g formed so as to be inserted along the rhombus-shaped insertion portion 25. Thereby, since the cross section of the direction (shear direction) which rotational torque transmits can be enlarged, it is easy to improve shear resistance. That is, the shear resistance in the direction (shear direction) in which the rotational torque is transmitted in the pair of steel pipes 20A and 20B is the cross section L of the protruding portion 11c on the abutting surface between the flange portions 21A and 21B (see FIG. 4C). However, since the cross section L of the projecting portion 11c is a cross section along the diagonal line of the rhomboid columnar portion 11g, it can be made larger than the square columnar portion 11d in the joint 10X shown in FIG. Easy to improve. In other words, when the same rotational torque (shear resistance) is transmitted (burdened), the protruding portion 11c can be made smaller in the rhombic columnar portion 11g than in the rectangular columnar portion 11d.

  Further, as shown in FIG. 4C, an axial force P acts on the flange portions 21A and 21B of the pair of joined steel pipes 20A and 20B. In order to transmit the axial force P smoothly. If the insertion portion 25 is square or rectangular like the joint 10X shown in FIG. 1, a certain thickness is required from the bottom of the square or rectangle. On the other hand, when the insertion portion 25 has a rhombus shape like the joint 10Y of this embodiment, the axial force P is caused by the triangular portion S formed downward from the abutting surface between the flange portions 21A and 21B. As a result, the thickness of the flange portions 21A and 21B of the steel pipes 20A and 20B can be reduced.

(Third embodiment)
FIG. 5 shows a joined body 100 using a joint 10Z according to a third embodiment of the present invention, where (a) is a perspective view, (b) is a sectional perspective view, and (c) is c. -C arrow line view, (d) is dd sectional drawing. The joint 10Z shown in FIG. 5 is substantially the same as the joint 10X shown in FIG. 1 except for the shapes of the openings 24A and 24B and the protrusion 11c, and the inner diameters of the flanges 21A and 21B. . Accordingly, in the joint 10Z shown in FIG. 5, the same reference numerals are given to substantially the same components as the joint 10X shown in FIG. 1, and the description thereof is omitted.

  In this joint 10Z, the openings 24A and 24B have a tapered shape in which the opening width becomes narrower toward the center of the steel pipes 20A and 20B, and the insertion part 25 formed by combining these openings 24A and 24B is also a steel pipe. It has a tapered shape that decreases toward the center of 20A and 20B. Further, the projecting portion 11 c also has a tapered shape that fits into the tapered insertion portion 25. Thereby, it becomes easy to insert each protrusion part 11c in each insertion part 25, and workability | operativity improves.

  Further, in the joint 10Z, the inner diameters of the flange portions 21A and 21B are smaller than the inner diameters of the flange portions 21A and 21B of the joint 10X shown in FIG. 1, and female screw portions 26A and 26B are provided on the inner hole surfaces thereof. Accordingly, for example, by connecting a male screw portion of a lifting tool (not shown) to the female screw portion 26A of the lower flange portion 21A, the lower steel pipe 20A is lifted by using this lifting tool to carry and carry the positioning. It can be carried out. Although not shown in FIG. 5, the upper steel pipe 20B is suspended in the same manner by attaching the same flange portion as the flange portion 21A attached to the upper end of the lower steel pipe 20A to the upper end of the upper steel pipe 20B. It can also be lifted using a tool to carry and align with the lower steel pipe 20A.

  In the above embodiment, the protruding portion 11c of each connecting member 11a has a length that covers substantially the entire length of the insertion portion 25. However, the protruding portion 11c only needs to be long enough to be inserted into the insertion portion 25. That is, the protruding portion 11 c can have a length that can be inserted only into the outer peripheral portion of the insertion portion 25. Thus, even if the protruding portion 11c is short, it functions as a temporary fixing or the like as described above, and compared with the case where there is no protruding portion 11c, rotational torque transmission from one steel pipe 20A to the other steel pipe 20B, and at that time It also contributes to the shear resistance. In addition, when shortening the protrusion part 11c, another member can also be inserted in the inner peripheral side part of the insertion part 25 in which the protrusion part 11c is not inserted. In this case, the protrusion 11c can be given priority to the temporary fixing function, and the rotational torque transmission function can be performed mainly by a separate member. Moreover, although the shape of the protrusion part 11c was a square shape in the above embodiment, it can also be made into a column shape or a truncated cone shape.

  Furthermore, in the above embodiment, although flange part 21A, 21B was formed continuously in the circumferential direction, it can also be formed intermittently in the circumferential direction. In this case, the opening part should just open the part which the flange part interrupted to the outer peripheral side. However, if the flange is formed continuously in the circumferential direction and the opening is formed in a groove shape cut out from the outer peripheral surface of the flange, the axial force acting on the set of rod-shaped bodies can be applied to the entire circumference of the flange. It is preferable in that it can be burdened with.

  Moreover, in the above embodiment, although 1 set of steel pipe 20A, 20B was joined as 1 set of rod-shaped bodies, 1 set of cylinders and prisms can also be joined. In short, the joint of the present invention can join a pair of rod-shaped bodies having a flange portion whose outer shape is circular.

100 joined body (steel pipe pile)
10X, 10Y, 10Z Joint 11 Connection unit 11a Connection member 11b Nipping part 11c Projection part 11d Square columnar part 11e Split male thread part 11f Male thread part 11g Rhombus columnar part 12 Fixing unit 12f Female thread part 20A, 20B Steel pipe (rod-like body)
21A, 21B end plate (flange)
22 Backing Ring 23A, 23B Flange Protrusion 24A, 24B Opening 25 Insertion 26A, 26B Female Thread

Claims (7)

A joint that joins a pair of rod-shaped bodies each having an opening that is open to the outer peripheral side of a flange portion having a circular outer shape,
A connection unit for connecting the set of flange portions in a state where the flange portions of the set of rod-shaped bodies are in contact with each other, and a fixing unit for fixing the connection unit to the set of rod-shaped bodies by tightening the connection unit from the outer peripheral side. Including
The connection unit includes a plurality of connection members arranged circumferentially on the outer peripheral side of the set of flange portions,
Each of the plurality of connecting members includes a sandwiching portion disposed so as to sandwich the pair of flange portions from both sides in the axial direction of the pair of rod-shaped bodies, and the openings of the pair of flange portions. A joint including a projecting portion projecting from the sandwiching portion so as to be inserted into an insertion portion formed in combination. The insertion portion is rectangular.
The joint according to claim 1, wherein the protruding portion includes a quadrangular columnar portion formed so as to be inserted along the insertion portion. The insertion portion has a rhombus shape having a diagonal line perpendicular to the axial direction,
The joint according to claim 2, wherein the square columnar portion includes a rhomboid columnar portion formed so as to be inserted along the insertion portion. The plurality of connecting members each include a split male screw portion that is combined in the circumferential direction to form a male screw portion,
The joint according to any one of claims 1 to 3, wherein the fixing unit includes a female screw portion that can be fastened to the male screw portion.   The joint according to any one of claims 1 to 4, wherein the flange portion is continuously formed in a circumferential direction, and the opening has a groove shape cut out from an outer peripheral surface of the flange portion. The joint according to any one of claims 1 to 5,
A joined body comprising the set of rod-like bodies joined by the joint. A joining method for joining a pair of rod-like bodies by a joint,
Each of the set of rod-shaped bodies includes a flange portion having a circular outer shape, and an opening portion opened to the outer peripheral side of the flange portion,
The joint includes a connection unit that connects the set of flange portions in a state in which the flange portions of the set of rod-shaped bodies are in contact with each other, and the connection unit is arranged around an outer peripheral side of the set of flange portions. A plurality of connection members arranged in a direction, each of the plurality of connection members protruding so as to be inserted into an insertion portion formed by combining the openings of the pair of flange portions Part
The joining method includes joining the plurality of connecting members temporarily to the set of flange portions by inserting the protruding portion into the insertion portion.

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