WO1997017504A1

WO1997017504A1 - Construction for joining post and beam or post and post to each other

Info

Publication number: WO1997017504A1
Application number: PCT/JP1996/003247
Authority: WO
Inventors: Nobutaka Tamura
Original assignee: Nobutaka Tamura
Priority date: 1995-11-06
Filing date: 1996-11-06
Publication date: 1997-05-15
Also published as: AU7505396A

Abstract

A cylindrical body (20) has a through hole having substantially the same cross-sectional shape as that of a steel pipe post (10), and is fitted over the steel pipe post (10). The cylindrical body (20) is fitted over the steel pipe post (10) with its through hole fitted over the steel pipe post (10) and is secured to the outside of the steel pipe post (10) by means of a weld (31). One end of a bracket (40) is fixed to the cylindrical body (20) thus fitted and secured, and the other end of the bracket (40) is connected to a beam.

Description

Akira Itoda Pillar-to-beam or pillar-to-column joining structure

The present invention relates to a column-to-beam or column-to-column joining structure, and more particularly, to joining a beam (eg, a steel beam) or a column (eg, a steel tube column) to a column (eg, a steel tube column) in a civil engineering / construction structure. The present invention relates to a column-to-beam or column-to-column joining structure suitable for use in a vehicle. Background technology

2. Description of the Related Art Conventionally, when connecting a steel tubular column and a steel beam in a steel-framed building such as a house, a connecting beam (bracket), which is composed of a beam member cut short, is usually connected to the column side. A long steel frame material to be used as a beam is joined. An example of such a conventional column-beam joint structure (hereinafter, referred to as a first conventional structure) will be described with reference to FIGS. 38 to 41 as follows.

First, as shown in Fig. 38 (a), a steel tube column 100 with a square cross section is cut horizontally at the beam joint to obtain an intermediate part 101, an upper part 102 and a lower part 103. . Next, as shown in Fig. 38 (b), grooves 101a and 101b are provided at the upper and lower ends of the middle part 101, and grooves 102a are formed at the lower end of the upper part 102. And a groove 103a at the upper end of the lower part 103.

Subsequently, as shown in FIG. 39 (a), the backing material 104 is fixed to the inside of the intermediate portion 101, the upper portion 102 and the lower portion 103 by welding, respectively. Then, as shown in Fig. 39 (b), the diaphragm 1

After interposition of the intermediate part 105, as shown in Fig. 40 (a), the intermediate part 101, the upper part 102 and the lower part 103 are arranged on the same straight line, and temporarily welded. Thus, the middle part 101, the upper part 102 and the lower part 103 are integrated with each other. In FIG. 40 (a), reference numeral 106 denotes a temporary weld.

Further, as shown in FIG. 40 (b), the temporary welding portion 106 is fully welded to complete the joining of the intermediate portion 101, the upper portion 102, and the lower portion 103. Fig. 40 (b) shows Reference numeral 107 denotes a main welded portion.

Then, as shown in FIG. 41, one end of a bracket 200 composed of an upper flange 202, a lower flange 203 and a web 201 is joined to the side surface of the pillar 100 by welding. At this time, the upper flange 202 and the lower flange 203 of the bracket 200 are welded to the corresponding side surfaces of the diaphragm 105, and the web 201 is welded to the side surface of the intermediate portion 101. I do.

Finally, one end of a steel beam (not shown) having the same cross-sectional shape as the bracket 200 is joined to the other end of the bracket 200 by welding, and the joining operation of the beam is completed.

Instead of welding, it is also possible to join using high-strength ports. Another example of this type of conventional column-beam joint structure (hereinafter referred to as a second conventional structure) is disclosed in Japanese Patent Laid-Open Publication No. Heisei 5-2-147069. In the second conventional structure, a plate-like member is welded to a beam joining position on a side surface of a steel pipe column, and a bracket for beam joining is welded to an outer surface of the plate-like member. This plate-shaped member can be wound around the outer periphery of the steel pipe column and welded.

Still another example of this type of conventional column-beam joint structure (hereinafter, referred to as a third conventional structure) is disclosed in Japanese Patent Application Laid-Open No. 3-27141439. In the third conventional structure, at the joint between the steel pipe column and the steel beam, the outer periphery of the steel pipe column is surrounded by a reinforcing member having a predetermined rigidity, and the steel beam is bolted using the screw holes provided in the reinforcing member. Yes, it is.

Still another example of this type of conventional column-beam joint structure (hereinafter, referred to as a fourth conventional structure) is disclosed in Japanese Utility Model Laid-Open No. 61-020602. In this fourth conventional structure, a large flat plate and a small flat plate which are located in the direction perpendicular to each other and have the same thickness and a difference of the same dimension as the thickness in the width dimension are connected at their edges to form an L-shaped section. In this method, a pair of L-shaped section steels are formed and welded to the outer surface of the rectangular column base body with the side end faces of the small plate being close to the inner end of the large plate.

In the first conventional structure described above, the steel tube column 100 is cut at the beam joint, divided into an intermediate portion 101, an upper portion 102, and a lower portion 103, and then divided through a diaphragm 105. It is necessary to join again by welding. For this reason, not only is the work complicated, but also it is difficult to adjust the beam joint position for each steel pipe column 100. In addition, since the cut steel pipe columns 100 are joined by welding, there is a problem that bending rigidity is low.

In the above-mentioned second conventional structure, a plate-like member is welded to a beam joint position on the side surface of a steel pipe column, and a beam-joining bracket is welded to the outer surface of the plate-like member. After cutting the steel pipe column at the beam joint, it is no longer necessary to integrate it. However, when welding the plate-shaped member to the outside of the steel pipe column, it is necessary to hold the plate-shaped member in a predetermined position in close contact with the steel pipe column. In addition, when wrapping a plate-shaped member around a steel tube column and welding it, it is necessary to wrap a plate member with high rigidity and heavy weight around the steel tube column and hold it. Have difficulty.

In the third conventional structure described above, the outer periphery of the steel pipe column is surrounded by a reinforcing member having a predetermined rigidity, and the steel beam is bolt-joined using screw holes provided in the reinforcing member. When enclosing, it is necessary to hold the reinforcing member in a predetermined position in a state in which the reinforcing member is in close contact with the outer periphery of the steel pipe column, and then fix them by porting or welding. Therefore, there is a problem that the work is difficult as in the case of the above-mentioned second conventional structure.

In the fourth conventional structure described above, a pair of L-shaped section steels are welded to the outer surface of the square pillar and the side end surface of the small flat plate is close to the inner surface end of the large flat plate. As in the case of the conventional structure and the third conventional structure, there is a problem that work is difficult.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a column-to-beam or column-to-column connection structure in which the operation of connecting a beam to a column can be performed more easily and more quickly than the conventional structure.

Another object of the present invention is to provide a joint structure between a column and a beam or a column and a column, which has low production costs as well as low operation costs.

Still another object of the present invention is to provide a column-to-beam or column-to-column connection structure in which a beam can be easily and quickly joined to columns of different sizes. Disclosure of the invention

(1) A joint structure of a first column and a beam according to the present invention includes a cylindrical body having a through-hole having a cross-sectional shape substantially the same as the cross-sectional shape of the column and capable of being fitted to the outside of the column. Become The tubular body is fitted to the outside of the pillar by passing the through hole through the pillar, and is fixed to the outside of the pillar, and uses the fitted and secured tubular body. The beam is connected to the column.

It is preferable that the cylindrical body is fixed to the column by welding at least at one of the upper and lower ends. This is because the fixing strength and the simplicity of the operation are good. The above-mentioned cylindrical body may be fixed to the pillar using a locking member such as a bottle or a bolt.

It is preferable that the cylindrical body has a window on a side surface thereof, and the cylindrical body is welded to the column through the window. This is because the bonding strength and the simplicity of the work are further improved as compared with the case where no window is provided.

It is preferable that the tubular body has thick portions at both upper and lower ends, and the tubular body is fixed to the column via the thick portions. This is because the bonding strength of the bracket and the like is improved as compared with the case where the thick part is not provided.

(2) The joint structure of the second column and the beam according to the present invention has a first through-hole having a cross-sectional shape substantially the same as the cross-sectional shape of the first column and capable of fitting the first column, A cylindrical body having a cross-sectional shape substantially the same as the cross-sectional shape of the second column, and having a second through-hole into which the second column can be fitted; and the first and second columns. Are fitted and fixed inside the first and second through holes, respectively, and the beams are joined to the first and second pillars by using the fitted and fixed cylindrical body. It is characterized by doing so. The size of the first and second tubular bodies may be different may be the same _c

(3) The joint structure of the third pillar and the beam according to the present invention has a through-hole having substantially the same cross-sectional shape as the first pillar and capable of fitting the first pillar, A cylindrical body having a support surface capable of supporting the column, wherein the first column is fitted and fixed inside the through hole, and the second column is fixed on the support surface And a beam is joined to the first column using the fitted / fixed tubular body.

This joint structure between the third column and the beam is suitable when the size of the first column is different from the size of the second column, and in that case, the size of the first column is It is preferably larger than the size of the second column. (4) The joint structure between the first pillar and the pillar according to the present invention has a first through-hole having substantially the same sectional shape as that of the first pillar and capable of fitting the first pillar, A cylindrical body having a cross-sectional shape substantially the same as the cross-sectional shape of the second column, and having a second through-hole into which the second column can be fitted; and the first and second columns. Are fitted and fixed inside the first and second through holes, respectively, and the first and second columns are joined to each other by the fitted and fixed cylindrical body. It is characterized by the following.

(5) The joint structure between the second pillar and the pillar according to the present invention includes a through-hole having substantially the same sectional shape as the first pillar and capable of fitting the first pillar, A cylindrical body having a support surface capable of supporting the column, wherein the first column is fitted and fixed inside the through hole, and the second column is fixed on the support surface And the first and second columns are joined to each other by using the fitted and fixed cylindrical body.

(6) In the first column-beam joining structure of the present invention, the column may have any cross-sectional shape, but for example, a rectangular or circular cross-sectional shape is preferable. The same applies to the first and second columns in the joint structure of the second and third columns and beams of the present invention. Also, in the joint structure of the first and second columns and columns of the present invention, The size of the first and second pillars may be the same or different. Further, the centers of the first and second columns may respectively correspond to the centers of the cylindrical bodies, or the centers of at least one of the first and second columns may be the centers of the cylindrical bodies. They may be skewed.

In the joint structure of the first pillar and the beam according to the present invention, it is sufficient that the cross-sectional shape of the through-hole of the cylindrical body is substantially the same as the cross-sectional shape of the pillar, and does not need to exactly match. In short, it is only necessary that the tubular body can be fitted outside the pillar. The same applies to the joint structure of the second and third columns and beams of the present invention, and the first and second columns in the joint structure of the first and second columns and columns of the present invention.

A method for fixing the cylindrical body fitted to the column in the first column and beam joint structure of the present invention, the second and third column and beam joint structures of the first and second aspects of the present invention And the first or second column fitted in the joint structure of the second column and the column. The method of fixing the cylindrical body is arbitrary. It may be fixed by welding, or may be fixed by bolting or binning.

In the joint structure of the first to third columns and beams of the present invention, one end of a connection beam (bracket) as a joining member is usually fixed to the tubular body, and the other end of the joining member is attached to the other end of the joining member. The beams are joined. However, it is a matter of course that the beam may be directly joined to the cylindrical body.

The first to third joint structures of columns and beams of the present invention and the first and second joint structures of columns and columns of the present invention join columns and beams or columns and columns in building structures and civil engineering structures. The present invention can be applied to any location, for example, to architectural structures other than steel structures and civil structures such as underground shopping malls and roads.

In the joint structure of the first to third columns and beams of the present invention and the joint structure of the first and second columns and columns of the present invention, the material of the cylindrical body and the joining member is, for example, SS400 (J1SG3101 rolled steel for general structures), SM490A (J1SG3106 rolled steel for welded structures) is preferred, but other steel and non-steel materials also require strength Can be used appropriately according to

The tubular body may be integrally formed by a mechanical cutting process, or may be integrally formed by rolling, drawing, or the like.

(7) The first joint structure between a column and a beam according to the present invention includes a cylindrical body having a through-hole having a cross-sectional shape substantially the same as the cross-sectional shape of the column and capable of being fitted to the outside of the column. The tubular body is fitted to the outside of the pillar by inserting the through hole into the pillar, and is fixed to the outside of the pillar. The fitted and secured tubular body is used for the pillar. The beam is joined to For this reason, when joining a beam to a column, the through-hole of the cylindrical body is inserted through the column so that the cylindrical body is fitted to the outside of the column, and then welded, bolted or binned It only needs to be fixed by any method.

In other words, since the tubular body is fitted on the outside of the column, it can be easily fixed simply by holding it from below. It is not necessary to hold the tubular body while keeping it tightly attached to the column as in the case of the above-mentioned conventional structure.

As described above, in the first column / beam joining structure of the present invention, the beam joining operation to the column can be performed easily and quickly. This leads to a reduction in work costs. Further, since the cylindrical body has a through-hole having a cross section substantially the same as the cross section of the column and can be fitted to the outside of the column, the manufacturing cost is low.

(8) In the joint structure of the second pillar and the beam according to the present invention, the first through-hole having substantially the same sectional shape as the first pillar and capable of fitting the first pillar, A cylindrical body having a cross-sectional shape substantially the same as the cross-sectional shape of the second column and having a second through-hole into which the second column can be fitted; The column is fitted and fixed inside the first and second through holes, respectively, and a beam is joined to the first and second column using the fitted and fixed cylindrical body. Like that. For this reason, the work of joining the beams to columns of different sizes can be performed easily and quickly.

(9) In the joint structure of the third column and the beam according to the present invention, the second column has a cross-sectional shape substantially the same as the cross-sectional shape of the first column, A cylindrical body having a support surface capable of supporting the column, wherein the first column is fitted and fixed inside the through hole, and the second column is provided on the support surface. The beam is fixed to the first column using the fitted / fixed cylindrical body. For this reason, it is possible to easily and quickly join a beam to columns of different sizes.

(10) In the joint structure of the first pillar and the pillar according to the present invention, the first through-hole having substantially the same sectional shape as that of the first pillar and capable of fitting the first pillar is provided. A cylindrical body having a cross-sectional shape substantially the same as the cross-sectional shape of the second column, and having a second through hole to which the second column can be fitted. The first pillar and the second pillar are fitted and fixed inside the first and second through holes, respectively, and the first and second pillars are joined to each other by the fitted and fixed cylindrical body. I have. For this reason, the joining operation of the pillars can be performed easily and quickly.

(11) In the joint structure of the second pillar and the pillar according to the present invention, the through-hole having a sectional shape substantially the same as the sectional shape of the first pillar and capable of fitting the first pillar is provided. A cylindrical body having a support surface capable of supporting the second column, wherein the first column is fitted and fixed inside the through-hole, and the second column is the support surface. Fixed on top and its mating

• The first and second columns are joined to each other by using the fixed cylindrical body. Therefore, as in the case of the first column-column connection structure, the column-column connection operation can be performed easily and quickly. The second column is fixed on the support surface. Since it is attached, there is an advantage that it is possible to easily cope with a shift in the fixed position of the first and second columns. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 (a) is a perspective view of an essential part of a first embodiment of a joint structure between a column and a beam according to the present invention, and FIG. 1 (b) is a cross-sectional view along the line AA.

FIG. 2 is a perspective view of a steel pipe column and a tubular body used in the column-beam joint structure of the first embodiment.

FIG. 3 is a perspective view showing a configuration in which a bracket is ported to a joint structure between a column and a beam according to the first embodiment, before brackets are joined.

FIG. 4 is a perspective view after the bracket is joined, showing a configuration in which the bracket is bolted to the joint structure between the column and the beam according to the first embodiment.

FIGS. 5 (a) and 5 (b) are perspective views after the bracket is joined, showing a configuration in which the bracket is joined to the joint structure between the column and the beam of the first embodiment by welding.

FIG. 6 is a perspective view of a steel pipe column and a cylindrical body used in a second embodiment of the joint structure between a column and a beam according to the present invention.

FIG. 7 is a perspective view of a main part of a joint structure between a column and a beam according to the second embodiment.

FIG. 8 is a sectional view taken along line BB of FIG.

FIG. 9 is a perspective view of a cylindrical body used in a third embodiment of the joint structure between a column and a beam according to the present invention.

FIG. 10 is a perspective view after the bracket is joined, showing a configuration in which the bracket is joined to the joint structure of the column and the beam of the third embodiment by welding.

FIG. 11 is a perspective view of a cylindrical body used in a fourth embodiment of the joint structure between a column and a beam according to the present invention.

FIG. 12 is a perspective view after the brackets are joined, showing a configuration in which the brackets are joined to the column / beam joining structure of the fourth embodiment by welding.

FIG. 13 is a perspective view showing a structure in which a bracket is bolted to a fifth embodiment of the joint structure between a column and a beam according to the present invention, before the bracket is joined.

FIG. 14 shows a structure in which a bracket is bolted to the joint structure between a column and a beam according to the fifth embodiment. FIG. 4 is a perspective view showing a structure after bracket joining.

FIG. 15 is a perspective view of a cylindrical body used in a sixth embodiment of the joint structure between a column and a beam according to the present invention.

FIG. 16 is a perspective view after the bracket is joined, showing a configuration in which the bracket is joined to the joint structure of the column and the beam of the sixth embodiment by welding.

FIG. 17 is a perspective view of a cylindrical body used in a seventh embodiment of the joint structure between a column and a beam according to the present invention.

FIG. 18 is a side view showing a modification of the cylindrical body used for the joint structure between the column and the beam in the seventh embodiment.

FIG. 19 is a side view showing a modified example of the projecting portion of the cylindrical body used in the column / beam joint structure of the fourth embodiment.

FIG. 20 is a schematic plan view showing a modification of the connection state of the brackets in the joint structure between the column and the beam in the first to seventh embodiments.

FIG. 21 is a perspective view of a relevant part of an eighth embodiment of the joint structure between a column and a beam according to the present invention. FIG. 22 is a perspective view of a steel pipe column and a tubular body used in the column-beam joint structure of the eighth embodiment.

FIG. 23 is a perspective view of a main part of a ninth embodiment of the joint structure between a column and a beam according to the present invention. FIG. 24 is a perspective view of a steel pipe column and a tubular body used for the column-beam joint structure of the ninth embodiment.

FIG. 25 is a sectional view of a joint structure between a column and a beam according to the ninth embodiment.

FIG. 26 is a schematic plan view showing a modification of the arrangement of the steel pipe columns in the column-beam joint structure of the ninth embodiment.

FIG. 27 is a perspective view of a main part of a tenth embodiment of the joint structure between a column and a beam according to the present invention. FIG. 28 is a perspective view of a steel pipe column and a tubular body used in the column-beam joining structure of the tenth embodiment.

FIG. 29 is a cross-sectional view of a cylindrical body used for the joint structure between the column and the beam in the tenth embodiment.

FIG. 30 is a perspective view of an essential part of a first embodiment of the joint structure between a column and a beam according to the present invention. Fig. 31 shows the steel pipe columns and cylindrical bodies used in the column-beam joint structure of the first embodiment. It is a perspective view of.

FIGS. 32 (a), (b) and (c) are perspective views showing examples of forming a cylindrical body. FIG. 33 (a), (b), (c) is a perspective view and a plan view showing another example of forming a tubular body.

FIG. 34 is a perspective view showing an actual application example of the present invention.

FIG. 35 is a perspective view showing another application example.

FIG. 36 is a perspective view of a cylindrical body showing another modification of the present invention.

FIGS. 37 (a) and (b) are a cross-sectional view of the cylindrical body of FIG. 36 applied to a column / beam joint structure, and an enlarged view thereof.

Fig. 38 is a perspective view showing one step of a conventional method for constructing a joint structure between a column and a beam. _C Fig. 39 is a perspective view showing one step of a conventional method for constructing a joint structure between a column and a beam. C Fig. 40 is a perspective view showing one step of a conventional method of constructing a joint structure between a column and a beam. _C Fig. 41 is a perspective view of a main part showing a conventional joint structure between a column and a beam. FIG. Embodiment of the Invention

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Here, an example in which the present invention joins an H-shaped steel beam to a steel pipe column will be described, but the present invention is not limited to these.

(First embodiment)

FIG. 1 and FIG. 2 show a first embodiment of the joint structure between a column and a beam according to the present invention. As shown in FIG. 2, the joint structure of this embodiment includes a steel pipe column 10 having a square cross section (square tube) and a steel tubular body (solid box) 20 having a square cross section (square tube). Consists of The steel tube column 10 has four flat sides 11 on the outside and a square cross-sectional hole 12 on the inside. The cylindrical body 20 has a through-hole 21 having a square cross section substantially the same as the cross-sectional shape of the steel pipe column 10 inside, and four flat sides 22 outside. At least one of the four side surfaces 22 is used as a joint surface of a beam or a bracket. A steel pipe column 10 can be fitted inside the through hole 21.

As shown in FIG. 1, the cylindrical body 20 is fitted on the outside of the copper pipe column 10 by inserting a steel pipe column 10 into the through hole 21. The cylindrical body 20 is also located at the joint position of the beam. It is fixed to the outside of the steel pipe column 10 by fillet welding. The welded portions 31 are formed along the four side surfaces 11 of the steel pipe column 10 so as to close gaps formed between the cylindrical body 20 and the steel column 10 at the upper and lower ends. In other words, the welded portions 31 at the upper and lower ends of the tubular body 20 extend along the entire circumference of the steel pipe column 10. The welded portion 31 may be at either the upper end or the lower end instead of the upper and lower ends of the cylindrical body 20.

In the joint structure of the first embodiment, a connection beam (bracket) 40 (here, formed of H-shaped steel) is fixed, for example, as shown in FIGS. In FIG. 3, a screw hole 23 is formed on one side surface 22 of the cylindrical body 20, and an end plate 50 is fixed to one end of the bracket 40 by welding. In the end plate 50, a through hole 51 is formed at a side surface, that is, at a position corresponding to each screw hole 23 of the joint surface 22. As shown in FIG. 4, after the bracket 40 is brought into contact with the entire opposing surface of the end plate 50 with the joint surface 22 of the cylindrical body 20, the bolt 40 is inserted through the through hole 51 of the end plate 50. It is fixed by screwing 60 into the corresponding screw hole 23 of the cylindrical body 20.

FIGS. 5A and 5B show an example in which the bracket 40 is directly fixed to the joint surface 22 of the cylindrical body 20 by welding. In the examples of FIGS. 3 and 4, the bracket 40 is fixed using the bolt 60 via the end plate 50, but in the joint structure of the first embodiment, welding is simplified as described above. A configuration is also possible. Fig. 5 (a) shows a case where a square steel pipe column 10 and a cylindrical body 20 are used, and Fig. 5 (b) shows a case where a circular steel pipe column 10 and a cylindrical body 20 are used. Shows the case when used. Here, the bracket may be welded in advance to the tubular body 20 or may be welded after fitting and fixing to the steel pipe column.

In FIG. 5 (a), the welded portion 71 is formed along the web 41 of the bracket 40 and the upper and lower flanges 42, 43. Also in FIG. 5 (b), the welded portion 71 is formed along the web 41 of the bracket 40 and the upper and lower flanges 42, 43. In FIG. 5 (b), the bracket The upper and lower flanges 42, 43 of the gate 40 are formed in an arc shape corresponding to the cylindrical outer surface 22 of the cylindrical body 20.

In the joint structure of the column and the beam of the first embodiment described above, the cylindrical body 20 has a through hole 21 having a cross section substantially the same as the cross section of the steel pipe column 10, and the outside of the steel pipe column 10. Can be fitted to The cylindrical body 20 is fitted to the outside of the steel pipe post 10 by inserting the through hole 21 into the steel pipe post 10 and is fixed to the outside of the steel pipe post 10. I have. For this reason, when joining a beam (not shown) formed of H-shaped steel to the steel pipe column 10, the cylindrical body 20 is inserted through the through-hole 21 of the cylindrical body 20, thereby forming the cylindrical body 10. It is only necessary to fit the 20 on the outside of the steel pipe column 10 and then fix it by any method such as welding, bolting or binning. Therefore, simply holding the tubular body 20 from below can easily fix the tubular body 10 to the steel pipe column 10, as in the case of the above-described conventional structure. It is not necessary to hold while keeping close to zero.

As described above, in the column and beam joining structure of the first embodiment, the joining operation of the beam to the copper tube column 10 can be performed easily and quickly. This leads to a reduction in working costs. Further, the cylindrical body 20 has a through hole 2 having a cross section substantially the same as the cross section of the steel pipe column 10.

It is sufficient if it has 1 and can be fitted to the outside of the steel pipe column 10, so that the manufacturing cost is low.

(Second embodiment)

6 to 8 show a second embodiment of the joint structure between a column and a beam according to the present invention. As shown in FIGS. 6 and 7, the joint structure of the second embodiment includes a steel pipe column 10 having a square cross section (square cylinder) and a steel tubular body having a square cross section (square cylinder). The point composed of 20 is the same as in the first embodiment. The second embodiment is different from the first embodiment in that a bin mosquito L 13 is formed on one side 11 of a steel pipe column 10 and one side 2 of a cylindrical body 20. 2 in that a bin hole 23 is formed at a position corresponding to the through hole 13.

As shown in FIG. 7, the tubular body 20 is fitted on the outside of the steel pipe post 10 by inserting a copper pipe post 10 into the through hole 21. The cylindrical body 20 is also fixed to the outside of the copper column 10 by welding at the joint position of the beam. The welded portions 31 are formed along the four side surfaces 11 of the copper pipe column 10 so as to close the gaps formed between the cylindrical body 20 and the steel column 10 at the upper and lower ends. . This point is the same as in the first embodiment, but in the second embodiment, as shown in FIG. 8, the steel pipe column 10 and the cylindrical body 20 are engaged with each other by the bin 80. ing. Thereby, in addition to the effect of the first embodiment, there is an advantage that the joining strength between the steel pipe column 10 and the cylindrical body 20 is further enhanced. FIG. 8 shows an engagement state between the steel pipe column 10 and the cylindrical body 20. The pin 80 penetrates the bin hole 13 of the cylindrical body 20 and the bin hole 23 of the steel pipe column 10, and the tip protrudes into the through hole 12 of the steel pipe column 10. Inside the via hole 23, the pin 80 is fixed by welding. The welded portion 32 is formed so as to fill the gap inside the bin hole 23, and

Although not shown, also in the joint structure of the second embodiment, the bracket 40 for beam joining can be fixed as shown in FIGS. 3 to 5, for example.

In the first embodiment, the example in which the screw hole 23 is formed on one side surface 22 of the cylindrical body 20 has been described. However, the end plate 50, the cylindrical body 20, and the steel pipe column 10 are described. By forming through holes that match each other and using a one-sided bolt, the same effect as in the second embodiment can be obtained. Here, "one-sided bolt" is a port that can be screwed into a screw hole from one direction and tightened and fixed.

(Third embodiment)

FIGS. 9 and 10 show a third embodiment of the joint structure between a column and a beam according to the present invention. As is clear from FIGS. 9 and 10, the joint structure of the third embodiment is the same as that of the first embodiment except that the configuration of the steel cylindrical body 20 used is different. It is.

The cylindrical body 20 of the third embodiment is equivalent to the cylindrical body 20 of the first embodiment provided with a window 24 as shown in FIG. The window 24 is formed by leaving only the joint surface 22 in a substantially I-shape and removing the center of the other three side surfaces 22.

Therefore, in the joint structure of the third embodiment, similarly to the first and second embodiments, in addition to the welded portions 31 formed on the upper and lower ends of the cylindrical body 20, the inner peripheral edge of the window 24 is also provided. By welding the tubular body 20 and the copper tube post 10 along the axis, there is an advantage that the fixing strength between the tubular body 20 and the steel tube post 10 can be made higher than in the first embodiment. . In this case, a weld 32 is formed along the entire inner peripheral edge of the window 24.

In the joining structure of the third embodiment, a bracket 40 for beam joining is fixed, for example, as shown in FIG. This fixed state is the same as that in FIG. 5 (a). Since the joining surface 22 of the cylindrical body 20 remains in a substantially I-shape, there is no problem in fixing the bracket 40. (Fourth embodiment)

FIGS. 11 and 12 show a fourth embodiment of the joint structure between a column and a beam according to the present invention. As is clear from FIGS. 11 and 12, the joint structure of the fourth embodiment is the same as that of the first embodiment except that the configuration of the steel cylindrical body 20 used is different. It is the same.

The cylindrical body 20 of the fourth embodiment is equivalent to the cylindrical body 20 of the first embodiment provided with projecting portions 25 as shown in FIG. One side surface 22 of these protrusions 25 is used as a joint surface. The thickness of the upper and lower ends of the cylindrical body 20 is increased by these protruding portions 25 as compared with the other portions.

In the joint structure according to the fourth embodiment, a bracket 40 for beam joining is fixed as shown in FIG. That is, the upper and lower flanges 4 2, 4 3 of the bracket 40 are joined to the joining surface 22 of the upper and lower protrusions 25, and the web 41 is joined to the side surface itself of the central tubular body 20. . Since the upper and lower ends 44 of the web 41 are cut out (scalloped), there is no problem in fixing the bracket 40 at all.

In the joint structure of the fourth embodiment, since the upper and lower flanges 42 and 43 of the bracket 40 are joined to the thicker upper and lower projecting portions 25, compared to the case of FIGS. There is an advantage that the strength of the joint of the cylindrical body 20 is increased.

As the protruding portions 25 formed at both upper and lower ends of the cylindrical body 20, a modified example as shown in FIG. 19 can be considered. FIG. 19 (a) shows the lower portion of the protruding portion 25 formed so as to have a concave arc-shaped cross section. This corresponds to the cross section of the protrusion 25 in FIG. FIG. 19 (b) shows that the lower part of the protruding portion 25 is formed so as to be perpendicular to the cross section. FIG. 19 (c) shows a lower portion of the protruding portion 25 formed to have a convex arcuate cross section. FIGS. 19 (d), (e), and (f) show the case where the protrusions 25 are provided slightly below the upper end of the cylindrical body 20. FIGS. ), (b) and (c) respectively.

(Fifth embodiment)

FIGS. 13 and 14 show a fifth embodiment of the joint structure between a column and a beam according to the present invention. This fifth embodiment is equivalent to the third embodiment shown in FIGS. 9 and 10, except that the beam joining bracket 40 is replaced with a bolt instead of welding. Tubular body 2 0 has a window 24. The joining condition of the bracket 40 is the same as that of Fig. 3.

O o

In the joint structure of the fifth embodiment, a beam joining bracket 40 is fixed by an end plate 50 by a bolt 60 as shown in FIG. Notches 52 are formed on both sides of the end plate 50 in correspondence with the substantially I-shaped joining surface 22 of the cylindrical body 20 to form a substantially I-shape.

In the joint structure of the fifth embodiment, similarly to the third embodiment, in addition to the welded portions 31 formed at the upper and lower ends of the cylindrical body 20, a welded portion is formed along the inner peripheral edge of the window 24. 32 is formed. As a result, there is an advantage that the fixing strength between the tubular body 20 and the steel pipe column 10 can be made higher than in the first embodiment.

(Sixth embodiment)

FIGS. 15 and 16 show a sixth embodiment of the joint structure between a column and a beam according to the present invention. This sixth embodiment corresponds to the fourth embodiment shown in FIGS. 11 and 12 in which a window 24 is formed in a cylindrical body 20. In other words, it corresponds to the third embodiment shown in FIGS. 9 and 10 in which the protrusions 25 are provided at the upper and lower ends of the cylindrical body 20, respectively. The bonding state of the bracket 40 is the same as that of FIG. In the joint structure of the sixth embodiment, a welded portion 32 is formed along the inner peripheral edge of the window 24 in addition to the welded portions 31 formed at the upper and lower ends of the cylindrical body 20. Therefore, there is an advantage that the fixing strength between the tubular body 20 and the steel pipe column 10 can be made higher than in the first and second embodiments. In addition, since the upper and lower flanges 42, 43 of the bracket 40 are joined to the thicker upper and lower projecting portions 25, the joints of the cylindrical body 20 are compared with those in FIGS. 5 and 10. There is also an advantage that the strength is increased.

Since the joint surface of the cylindrical body 20 remains in an approximately I shape, there is no problem in joining the bracket 40.

(Seventh embodiment)

FIG. 17 shows a cylindrical body used in a seventh embodiment of the joint structure between a column and a beam according to the present invention. The cylindrical body 20 of the seventh embodiment differs from the cylindrical body 20 of the third embodiment of FIG. 9 in that, instead of the window 24, two straight windows 26 extending in the vertical direction are opposed to each other. It corresponds to the one formed on the side surface 22. In the present invention, the side surface 22 of the cylindrical body 20 has such a shape. A window 26 can be formed.

FIG. 18 shows a modification of the window formed in the cylindrical body 20. FIG. 18 (a) shows a cylindrical body 20 in which two circular windows 26 are formed apart from each other on the side surface 22. In FIG. 18 (b), two square windows 26 are formed on the side surface 22 of the cylindrical body 20 so as to be vertically separated from each other. FIG. 18 (c) shows two triangular windows 26 formed on the side surface 22 of the cylindrical body 20 so as to be vertically separated from each other. Various other modifications are also conceivable. (Modified example)

In the first to seventh embodiments, the bracket 40 is described as being joined to only one side surface 22 of the cylindrical body 20. However, the present invention is not limited to this, and it is necessary to Of course, the bracket 40 can be joined to two or more side faces 22 of the cylindrical body 20. FIG. 20 shows an example in which the bracket 40 is joined to all four side surfaces 22 of the cylindrical body 20.

According to the first to seventh embodiments, since the steel pipe column 100 is a through column and is not cut and welded again unlike the first conventional structure, the rigidity is greatly improved. This has the effect of being extremely excellent in earthquake resistance. Needless to say, the rigidity and the earthquake resistance are further improved by welding the cylindrical bodies 20, 20 a, 20 b to the outside of the steel pipe column 10.

(Eighth embodiment)

Figs. 21 and 22 show an eighth embodiment of the joint structure between a column and a beam according to the present invention. C In the eighth embodiment, a steel pipe column 10 of the first embodiment is replaced with a square cross section. Used two steel pipe columns 10a and 10b of the same size. The cylindrical body 20 is the same as that of the first embodiment in FIGS. 1 and 2. The eighth embodiment also shows an embodiment of the joint structure between pillars according to the present invention.

The steel tube columns 10a and 10b have four flat sides 11a and lib on the outside, and square holes 12a and 12b on the inside. The steel pipe columns 10a and 10b are arranged linearly with their opposing ends in contact inside the tubular body 20. As can be seen from FIG. 21, the reinforcing diaphragm 81 is fixed to the lower inside of the through hole 12 a of the upper steel pipe column 10 a, and the reinforcing diaphragm 82 is connected to the lower steel pipe column 10. It is fixed to the inner upper end of the through hole 1 2b of b. The cylindrical body 20 is fixed to the outside of the steel pipe columns 10a and 10b by welding at the joint positions of the beams. The welded portions 31 are formed on the four sides 11 a, 1 1 of the steel pipe columns 10 a, 10 b so as to close the gaps formed between the upper and lower ends of the tubular body 20 and the steel pipe columns 10 a, 10 b. It is formed along b. Thus, the two steel pipe columns 10a, 10b are joined to each other and integrated.

In the joint structure of the eighth embodiment, a beam joining bracket 40 (here, formed of H-shaped steel) is fixed as shown in FIGS. 3 to 5, for example.

In the joint structure of the column and the beam of the eighth embodiment, the cylindrical body 20 has the through-hole 21 having the cross-sectional shape substantially the same as the cross-sectional shape of the two steel pipe columns 10a and 10b, and the steel pipe columns 10a and 10b. The cylindrical body 20 is fitted to the outside of the copper pipe columns 10a and 10b by inserting the through holes 21 into the steel pipe columns 10a and 1 Ob, and It is fixed to the outside of the steel pipe columns 10a and 10b. For this reason, when joining a beam (not shown) to the steel pipe columns 10a and 10b, the through-hole 21 of the cylindrical body 20 is inserted into the steel pipe columns 10a and 10b. It is only necessary to fit the outside of the steel pipe columns 10a and 10b and then fix them by any method such as welding, bolting or binning. Therefore, simply holding the tubular body 20 from below can easily fix the tubular body 20 to the steel pipe columns 10a and 1 Ob. It is not necessary to hold it tightly against a, 10b. As described above, in the joint structure of the column and the beam of the eighth embodiment, the work of joining the beam to the two copper tube columns 10a and 10b can be performed easily and quickly. This leads to a reduction in working costs. In addition, since the cylindrical body 20 has a through-hole 21 having a cross-sectional shape substantially the same as the cross-sectional shape of the copper pipe columns 10a and 10b, and it is sufficient if the cylindrical body 20 can be fitted to the outside of the steel pipe columns 10a and 10b. The manufacturing cost is also low.

Further, in the process of constructing the joint structure between the column and the beam, it is possible to simultaneously join the two steel pipe columns 10a and 10b.

(Ninth embodiment)

FIG. 23 to FIG. 25 show a ninth embodiment of the joint structure between a column and a beam according to the present invention. In the ninth embodiment, a steel tube column 10c having a square cross section larger in size than the upper steel tube column 10a is used in place of the lower steel tube column 1 Ob of the eighth embodiment. Also, Correspondingly, the cylindrical body 20a has a through-hole 21a in which the upper steel pipe column 10a can be fitted and a through-hole 21b in which the lower steel pipe column 10c can be fitted. have. A flat side surface 22a is formed in an upper portion corresponding to the through hole 21a, and a flat side surface 22c is formed in a lower portion corresponding to the through hole 21c. The ninth embodiment also shows another embodiment of the joint structure between pillars according to the present invention.

As shown in Fig. 24, the lower steel pipe column 10c has four flat sides 11c on the outside and a square cross-section hole 12c on the inside.

The lower copper column 10c is fitted into the lower through hole 21b of the cylindrical body 20a from below, and the upper steel column 10a is positioned above the cylindrical body 20a. Is fitted into the inside of the through hole 21a from above. The steel pipe columns 10a and 10c have their opposing ends in contact with each other inside the cylindrical body 20a, and are arranged substantially linearly in the vertical direction.

As can be seen from Fig. 25, the reinforcing diaphragm 81 is fixed to the lower inside of the through hole 12a of the upper steel pipe column 10a, and the reinforcing diaphragm 82 is connected to the lower steel pipe column 10a. The through hole of c is fixed to the inner upper end of 1 c.

The cylindrical body 20a is fixed to the outer sides of the copper tube columns 10a and 10c by welding at the joint positions of the beams. The welded portions 31 are made of steel pipe columns 10a, 10c so as to close the gaps formed between the steel pipe columns 10a, 10c at the upper and lower ends of the cylindrical body 20a. It is formed along one side lla and 1 1b respectively. Thus, the two steel pipe columns 10a, 10c are joined and integrated with each other.

In the joint structure of the ninth embodiment, for example, a bracket 40 (here, formed of H-section steel) for beam joining is provided on the flat side surface 22 a or 22 c of the cylindrical body 20 a. It is fixed as shown in Figs.

In the joint structure between a column and a beam according to the eighth embodiment, a cylindrical body 20a provides a joint structure of a beam, and simultaneously joins two steel pipe columns 10a and 10c having different sizes. There are other advantages.

In the eighth embodiment, the planar arrangement of the two steel pipe columns 10a, 10c and the cylindrical body 20a is as shown in FIG. 26 (c). That is, the center of the large-sized steel pipe column 10c coincides with the center of the cylindrical body 20a, and the small-sized steel pipe column 10a has the center of the cylindrical body 20a. To one corner. However, the arrangement is not limited to this, and it goes without saying that the arrangement shown in FIG. 26 (a) or FIG. 26 (b) is also possible. In Fig. 26 (a), the center of the cylindrical body 20a coincides with the center of the large steel pipe column 10c, and the center of the small steel pipe column 10a has the center of the cylinder. It is shifted toward the center of one side of the shape 20a. In Fig. 26 (b), the center of both steel pipe columns 10c and 10a coincides with the center of the cylindrical body 20a.

(10th embodiment)

FIGS. 27 to 29 show a tenth embodiment of the joint structure between a column and a beam according to the present invention. The tenth embodiment has the same configuration as that of the ninth embodiment except that a cylindrical body 20b closed on the upper surface is used instead of the cylindrical body 20a of the ninth embodiment. is there. The tenth embodiment also shows still another embodiment of the joint structure between pillars according to the present invention.

The configuration of the cylindrical body 20b is as shown in FIG. 29, and includes a top surface 26b, side surfaces 22c, and an internal space 21b. The internal space 21b is large enough to fit the large steel pipe column 10c. The outside has a flat side surface 22c.

In the tenth embodiment, the small-sized copper tube post 10a is placed on the upper surface 26b of the cylindrical body 2Ob and fixed by welding. Therefore, the welded part 31 is formed at the joint between the steel pipe column 10a and the cylindrical body 2Ob, in other words, at the lower end of the steel pipe column 10a. In the tenth embodiment, the small-sized steel pipe column 10a is fixed on the upper surface 26b of the cylindrical body 2Ob, so that even if the steel pipe columns 10a have different sizes, Has the advantage that it can be applied even if it is slightly different.

(Example 11)

FIG. 30 and FIG. 31 show a first embodiment of a joint structure between a column and a beam according to the present invention. The eleventh embodiment is different from the tenth embodiment in that a cylindrical body 20 b having a circular cross section is replaced with a cylindrical body 20 b having a square cross section and upper and lower steel pipe columns 10 a, 10 c. Corresponds to those using upper and lower steel tube columns 10a, 10c. In the eleventh embodiment, the same effects as in the tenth embodiment can be obtained. The eleventh embodiment also shows still another embodiment of the joint structure between pillars according to the present invention.

(Assembly construction method) The tubular bodies 20, 20a, 20b according to the present invention may be formed by cutting a square steel pipe to a predetermined length, or may be formed by pressing a circular steel pipe from all sides. Of course. In addition, four plate-shaped steel materials are welded into a square shape, and as shown in FIGS. 32 (a), (b) and (c), two channel-type steel materials are formed by welding. 33 As shown in Figures (a), (b) and (c), four L-shaped steel members can be formed by welding, and these flat steel members, channel steel members and L-shaped steel members can be formed. It can also be formed by arbitrarily combining die steel materials.

The tubular bodies 20, 20a, 20b are attached to the steel pipe columns 10 as follows. The cylindrical bodies 20, 20a, and 2 Ob are set up on the processing table, and the bracket 40 is welded to one or more side surfaces of the cylindrical bodies 20, 20a, and 20b. On the other hand, the steel pipe column 10 is placed on the pedestal and horizontally arranged, and the tubular bodies 20, 20a, 2 Ob to which the brackets 40 are welded are inserted and fitted in order from one end of the steel pipe column 10 to a predetermined position. Set to. Check the linearity and dimensional accuracy of the steel pipe column 10 and the cylindrical bodies 20, 20a, 2 Ob before welding the fillet. In addition, it is preferable to press-fit an iron plate having a height of about 6 to 9 mm into the gap between the steel pipe column 10 and the cylindrical bodies 20, 20a, and 2 Ob, in particular, into the gap between the square portions, and weld.

Then, the column-to-beam or column-to-column connection structure of the present invention is applied to an actual building as shown in FIG. That is, a plurality of steel pipe columns 10, 10 in which the tubular body 20 (or 20a, 20b) is fitted and fixed, the brackets 40 welded to the tubular body 20 face each other and are the same. It is built so that it is located on the line, and the beam B is joined between the end faces of the two brackets 40,40. In the example of FIG. 34, the bracket 40 and the beam B are bolted to each other through a well-known slyce plate S across the upper and lower flanges and the web. In FIG. 34, the backing metal is fixed by welding to the inside of the joint between the tubular body 20 and the bracket 40, but this is not essential in the present invention.

(Effect)

According to the column-to-beam or column-to-column joint structure of the present invention, the tubular part 20 to which the bracket 40 is joined is not the joint part (that is, the maximum stress part) unlike the conventional structure. The rigidity of column 10 and bracket 40 (or beam) is high, It can exhibit the maximum power of the material. According to the conventional structure, for example, the first conventional structure, when bending stress is transmitted from the beam (bracket 200) to the steel pipe column 100, there is a possibility that distortion occurs at almost the intermediate portion of the intermediate portion 101. However, according to the present invention, it has been confirmed by an experiment that even when a bending load is applied to a beam, almost no accompanying distortion occurs. In particular, as shown in FIG. 10, if the distance between the upper and lower ends of the cylindrical body 20 and the upper and lower flanges 42, 43 of the bracket 40 is set to be large, in other embodiments, However, the rigidity can be further increased.

According to the first and second embodiments and the seventh to eleventh embodiments, for example, as shown in FIG. 35, a bracket or a beam joined to each side surface of the cylindrical body 20 is provided. (In Fig. 35, beams B, B having different beam structures are joined to two cylindrical bodies 20.) Even if the sizes are different from each other, the cylinders are left as they are without haunching. Can be joined to the shape 20.

(Modified example)

The present invention is not limited to the above embodiments. For example, a small diameter (for example, a diameter of about 6 mm) penetrating inside and outside at an arbitrary position of the cylindrical body 20, 20 a, 20 b ) Air holes can also be formed. In this case, the location where the air hole is formed is preferably substantially at the middle position of the height of the cylindrical body, and is preferably a flat plate part avoiding the square part.

Further, the steel pipe column 10 and the cylindrical bodies 20, 20 a, and 20 Ob may have a rectangular cross section instead of a square cross section or a circular cross section. It is only necessary that the shape of the cross section of the shape be matched. Further, it goes without saying that the square cross section and the rectangular cross section may each have an inner corner having a curvature.

Further, as shown in FIGS. 36 and 37 (a) '(b), the cylindrical bodies 20, 20 a, and 20 b are made of four thick flat plate steel plates P, P. It can also be formed by welding. In this case, in order to improve the rigidity, it is preferable to weld flat stiffeners S 1 and S 2 to at least one of the upper and lower end surfaces. The tubular body having the stiffener S1 welded to the upper end face can be applied, for example, to the embodiment shown in FIG. 28 as it is, and the tubular body according to this example can be applied to the outer periphery of a steel pipe column. It is also possible to substitute for the intermediate portion 101 in the conventional structure without inserting. In this case, flat steel It has been confirmed that when the thickness of the plates P, P is twice or more the thickness of the upper and lower portions 102, 103, the same effects as those of the tubular bodies 20, 20a, 20b of the present invention can be obtained.

Claims

Scope of language

1. A cylindrical body having a through-hole having substantially the same cross-sectional shape as that of the column and having a cylindrical shape that can be fitted to the outside of the column, and the cylindrical body having the through-hole inserted through the column. Thereby, the beam is fitted to the outside of the column and fixed to the outside of the column, and the beam is joined to the column using the fitted and fixed cylindrical body. The feature is the joint structure of columns and beams.

2. The joint structure between a column and a beam according to claim 1, wherein the cylindrical body is fixed to the column at least at one of upper and lower ends by welding.

3. The joint structure between a column and a beam according to claim 1, wherein the tubular body is fixed to the column using a locking member.

4. The column and beam according to any one of claims 1 to 3, wherein the cylindrical body has a window on a side surface thereof, and the cylindrical body is welded to the column through the window. Joint structure.

5. The pillar according to any one of claims 1 to 4, wherein the tubular body has thick portions at both upper and lower ends, and the tubular body is fixed to the pillar via the thick portions. Beam and beam

6. The first pillar has a cross-sectional shape substantially the same as the cross-sectional shape of the first pillar, and has a first through-hole into which the first pillar can be fitted, and a cross-sectional shape substantially the same as the cross-sectional shape of the second pillar. And a cylindrical body having a second through hole to which the second column can be fitted, and the first and second columns are respectively provided inside the first and second through holes. A joint structure between a column and a beam, wherein the beam is joined to and fixed to the first and second columns using the fitted and fixed cylindrical body. .

7. The joint structure between a column and a beam according to claim 6, wherein the first and second cylindrical bodies have the same size.

8. The joint structure between a column and a beam according to claim 6, wherein the first and second cylindrical bodies have different sizes.

9. A cylindrical body having a cross-sectional shape substantially the same as the cross-sectional shape of the first column and having a through-hole into which the first column can be fitted, and a support surface capable of supporting the second column. The first column is fitted and fixed inside the through hole, and the second column is fixed to the support. A joint structure between a column and a beam, wherein the beam is joined to the first column using a tubular body fixed and fixed on a holding surface and using the fitted and fixed cylindrical body.

10. The joint structure between a column and a beam according to claim 9, wherein the size of the first cylindrical body is larger than the size of the second cylindrical body.

1 1. The first pillar has a cross-sectional shape that is substantially the same as the cross-sectional shape of the first column, and the first through-hole into which the first column can be fitted; And a cylindrical body having a second through-hole into which the second column can be fitted, and the first and second columns are provided inside the first and second through-holes. A column-to-column joining structure, wherein the first and second columns are joined to each other by a fitted and fixed cylindrical body.

12. The joint structure between pillars according to claim 11, wherein the first and second pillars have the same size.

13. The joint structure between pillars according to claim 11, wherein the first and second pillars have different sizes.

14. The joint structure between columns according to any one of claims 11 to 13, wherein the centers of the first and second columns coincide with the centers of the cylindrical bodies, respectively.

15. The joint structure between pillars according to any one of claims 11 to 13, wherein a center of at least one of the first and second pillars is shifted from a center of the cylindrical body.

16. A cylindrical body having a cross-sectional shape substantially the same as the cross-sectional shape of the first column and having a through-hole into which the first column can be fitted, and a support surface capable of supporting the second column. The first column is fitted and fixed inside the through hole, and the second column is fixed on the support surface, and the fitted and fixed cylindrical body is provided. A joint structure between pillars, wherein the first and second pillars are joined to each other by utilizing the following.

17. The joint structure between pillars according to claim 16, wherein the first and second pillars have the same size.

18. The joint structure between pillars according to claim 16, wherein the first and second pillars have different sizes.

19. The joint structure between columns according to any one of claims 16 to 18, wherein the centers of the first and second columns coincide with the centers of the cylindrical bodies, respectively.

20. The joint structure between columns according to any one of claims 16 to 18, wherein the center of at least one of the first and second columns is offset from the center of the cylindrical body.