JPH04265341A - Device for joining column - Google Patents

Abstract

PURPOSE:To connect the columns with a bolt so that a joining section is not projected to the outside. CONSTITUTION:A joining cylindrical body 5 is projected to the end of one column 2, and the end of the other column 1 is inserted into the cylindrical body 5. A bolt 18 is inserted from the outside through opening sections 23 and 25 formed on the cylindrical body 5 and the column 1 to move it to bolt holes 10, 11 and 14, and both joining cylindrical body 5 and column 1 are fastened with the bolt 18.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a column-to-column joint structure used in steel-frame buildings using steel pipe columns.

0002

2. Description of the Related Art Generally, there are two methods for joining steel pipe columns such as square steel pipes: on-site welding and bolt joining via joining plates. In field welding, fin-shaped plates with bolt holes are welded to the ends of each column in advance, and these plates are temporarily fastened with bolts at the site via another plate. After welding the ends together, the plate is cut off. On the other hand, the bolt connection method involves welding horizontal joint plates to the ends of the columns in advance, aligning these joint plates, and connecting them with vertical bolts.

0003

[Problems to be Solved by the Invention] In the above-mentioned conventional joint structure, the on-site welding method requires welding fin-like plates in advance, and furthermore, it is difficult to weld these fin-like plates on-site. Since it is removed at the end after it has been removed, there is a drawback that the number of processing steps and work hours increases, leading to high costs. Another disadvantage of on-site welding is that it is difficult to control the quality of welding. On the other hand, in bolted joints using horizontal joint plates, the joint plates protrude horizontally at the column joints, so the space between the columns becomes narrower, making it difficult for external wall mounting brackets and other metal fittings to be connected. There are disadvantages in that there are restrictions on the installation of parts and the arrangement of openings such as windows. Furthermore, in such a structure, there is a problem that the joint strength is weak because the load transmission part is located outside the column.

[0004] The present invention has been made with the aim of eliminating such conventional drawbacks.

[0005]

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a bolt hole and a bolt inserted into the bolt hole at the end of one of the upper and lower pillars that are joined to each other. A joining cylinder is provided with an opening that is large enough to accommodate the head and communicates with the bolt hole, and the other cylinder is provided with a bolt hole and an opening that match the bolt hole and the opening. The present invention is characterized in that the end of the pillar is inserted and the end of the other pillar and the joining cylinder are tightly connected with a bolt inserted into the bolt hole.

[0006]

[Embodiment] FIG. 1 is a perspective view of a joint portion before pillar joining. Of an upper pillar 1 and a lower pillar 2 that are joined to each other, the upper end of the lower pillar 2 is connected to the lower pillar through a diaphragm 4. A beam joining cylinder 3 having the same cross section as 2 is welded. Furthermore, another diaphragm 4 is welded to the upper end surface of this joining cylinder 3. Reference numeral 5 denotes an outer cylindrical body for joining the columns, which has a cross section larger than that of the columns 1 and 2, and its lower end is welded to the upper surface of the diaphragm 4 on the upper side. This outer cylinder 5
An inner cylinder 6 having the same cross-sectional shape as the outer cylinder 5 and smaller in cross-section than the columns 1 and 2 as shown in FIG. 2 is welded to the upper surface of the diaphragm 4 at its lower end. A slit 9 is formed in the corner portion of each of these cylinders 5 and 6 from the upper end to the vicinity of the lower end so as to cut out the corner portion.

Four joining bolt holes 10 and 11 are formed in each side surface of each of the cylindrical bodies 5 and 6, respectively. Furthermore,
Similarly, on the side, there are two vertically opposing bolt holes 10,
A circular opening 2 large enough to fit the bolt head in the middle of 11
3 is formed, and this opening 23 and the bolt holes 1 above and below it are formed.
0 and 11 are communicated with each other through a communication port 24 that is approximately the same size as the bolt holes 10 and 11. In addition,
The upper end of the inner cylindrical body 6 is slightly bent inward to connect both cylindrical bodies 5.
, 6 is widened. Further, a bolt hole 14, an opening 25, and a communication port 26 are formed at the lower end of the upper column 1 to fit the bolt holes 10 and 11 of each cylinder 5 and 6. The diaphragms 4, 4 at both the upper and lower ends of the joining cylinder 3 have four flanges 8 integrally protruding from their end faces in a cross shape, and between the flanges 8, 8, which are vertically opposed to each other, there are web plates 7, respectively. Welded the web plate 7 and flange 8.
, 8, a vertical joining plate 15 is welded to the ends of the beam joining brackets 16 having an H-shaped cross section. Further, bolt holes 17 for joining are formed in the joining plate 15.

FIG. 2 is a perspective view of the pillars 1 and 2 in a joined state, and FIG. 3 is a cross-sectional view of the main parts. The upper column 1 has the same size and the same cross section as the lower column 2, and its lower end is inserted into the gap 13 between the outer cylinder 5 and the inner cylinder 6 from above, and the inner cylinder 6 and the outer cylinder 5 and each bolt hole 10 of column 2
, 11, and 14, and insert the bolt 18 from the head side through the opening 23, and connect the communication port 2.
4 and 26 to the bolt holes 10, 11, and 14, and is fixed by tightening a nut 27 screwed onto the tip of the bolt 18. The bolt at this time is bolt 1
8 and the outer periphery of the nut 27, and then tighten this nut 27.
A structure that allows the bolt 18 to be rotated from the side is used. At that time, the upper column 1 is placed in the gap 13.
A positioning stand 19 on which the lower end of the bolt is placed is fixed, so that the positions of the bolt holes 10, 11, and 14 can be easily aligned. Furthermore, although the column 2 and the joining cylinders 5 and 6 are joined by friction welding, each side of each joining cylinder 5 and 6 is separated by a slit 9, so when tightening the bolts, they are separated. By slightly bending the sides, it comes into close contact with the side surface of the upper column 1, ensuring joint strength.

At the tip of the beam joining bracket 16, the tip of a beam 20 made of H-beam steel is joined to the plate 21 fixed to the tip and the joining plate 15 by bolts 28.

0010

[Effects of the Invention] As described above, in this invention, the end of one column is inserted into the connecting cylinder protruding from the end of the other column and these are bolted to each other. There are fewer quality control problems, and since positioning can be done simply by inserting the end of the column, there is no need for the troublesome work of welding a temporary fixing plate and cutting it off at the end, resulting in lower costs. It has a construction effect. On the other hand, since the joining cylinder and the column are directly joined with bolts, the joining plate does not protrude laterally, and there is no inconvenience such as restrictions on attachment of external wall fittings, etc. In addition, since the load transmission section is within the cross section of the column, the joint strength is also increased.

Furthermore, in this invention, since an opening large enough to accommodate the head of the bolt is formed on the side surface of the joining cylinder, the bolt is inserted from the head side through this opening and is inserted into the bolt hole. By moving it, it can be attached to the bolt hole, so there is no need to weld the back nut to the inner surface of the inner cylindrical body, and even if an opening is taken into consideration, processing costs can be reduced. At that time, use a commercially available high-tensile bolt for torque management that grips the tips of the nut and bolt from the outside and rotates them, and when the tightening torque reaches a specified value, the gripped portion of the bolt tip is cut off. It is possible,
The advantage is that inexpensive bolt parts can be used.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a joint before joining, showing an embodiment of the present invention.

FIG. 2 is a perspective view of the bonded state.

FIG. 3 is a side view showing a main part in a joined state in a longitudinal section.

FIG. 4 is a perspective view of the inner cylinder.

[Explanation of symbols]

1 Lower pillar 2 Upper pillar 3 Cylindrical body for beam joining 5 Outer cylinder 6 Inner tube 9 Slit 10 Bolt hole 11 Bolt hole 14 Bolt hole 16 Bracket 18 bolts 23 Opening 24 Communication port 25 Opening 26 Communication port

Claims (5)

[Claims] Claim 1: At the end of one of the upper and lower columns that are joined to each other, an opening is provided that is large enough to accommodate a bolt hole and the head of a bolt inserted into the bolt hole, and that communicates with the bolt hole. protrudingly provided with a connecting cylindrical body, and inserting into this cylindrical body the end of the other column having a bolt hole and an opening that match the bolt hole and opening; A column joining device characterized in that the and the joining cylindrical body are tightly connected by bolts inserted into the bolt holes. 2. The cylinder for joining the columns is a double structure consisting of an inner cylinder and an outer cylinder, both of which are provided with bolt holes and the openings communicating with the bolt holes so as to match each other. 2. The column joining device according to claim 1, wherein the lower end of the upper side column is inserted between the two cylindrical bodies. 3. The column joining device according to claim 1, wherein the joining cylinder has a rectangular cross section, and a slit is formed over a certain length from the upper end of the corner portion. 4. A cylinder for beam connection is welded to the upper end of the lower side column via a diaphragm, and a lower end of the cylinder for column connection is welded to the upper surface of the diaphragm at the upper end of the cylinder for beam connection. The column joining device according to any one of claims 1 to 3. 5. The column joining device according to claim 4, wherein a joining bracket is welded to the outer surface of the beam joining cylinder.