JPH08277574A - Structure for interconnecting steel-pipe columns having different diameters - Google Patents

Abstract

PURPOSE: To interconnect upper and lower columns having different pipe diameters in stable quality by simple structure. CONSTITUTION: The connecting sections of an upper-side column 1 and a lower- side column 2 consisting of steel-pipe columns respectively are arranged between an upper-floor beam 12 and a lower-floor beam 13. The upper-side column 1 and the lower-side column 2 are joined through tapered cylinders 3. The tapered cylinders 3 have straight cylinder sections 3b, 3c having the same diameter as the outside diameters of the upper and lower columns 1, 2 while being continued from the upper and lower sections of tapered cylinder sections 3a. The upper-side straight cylinder sections 3b and the lower-side straight cylinder sections 3c are joined with each upper and lower column 1, 2 by one-side bolts and high-tensile bolts 6 together with splice plates 4, 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column-column joining structure of steel pipe columns having different diameters, in which upper and lower steel pipe columns having different pipe diameters are joined.

[0002]

2. Description of the Related Art Conventionally, in the case of joining upper and lower steel pipe columns having different pipe diameters, the column is generally drawn as shown in FIG.
This is done at the beam joints. That is, the upper and lower steel pipe columns 10
1 and 102, a tapered tube 103 is welded through diaphragms 104 and 105 to form the diaphragm 10
4, 105, upper and lower flanges 106a, 106 of the beam 106
Weld b. The beam 106 has a size in which the ends thereof are obliquely cut along the side surface of the tapered cylinder 103, and the tips of the upper and lower flanges 106a and 106b are butted against the end faces of the upper and lower diaphragms 104 and 105 having different sizes. It is being processed.

[0003]

As described above, since the column is conventionally drawn at the column-beam joint, it is necessary to process the end portion of the beam 106 so as to match the drawn shape of the column. There is a problem that the processing is complicated and the cost is high. Further, since the column-beam joint is a place where a large force acts in a complicated manner, it is necessary to keep the welding quality high, and quality control is not easy.

An object of the present invention is to provide a column-column joining structure of steel pipe columns with different diameters, in which upper and lower columns having different pipe diameters can be easily joined with a simple structure and quality control is easy.

[0005]

A column-column joint structure for steel pipe columns of different diameters according to the present invention comprises an upper column and a lower column, each of which is a steel column, and the upper and lower ends of which are the upper column and the lower column, respectively. It joins via the taper-shaped cylinder which became the same in outside diameter, and arrange | positions this joining part in the middle of an upper floor beam and a lower floor beam. The tapered cylinder is assumed to have a straight cylinder part having the same outer diameter as that of the upper and lower pillars, following the upper and lower parts of the tapered cylinder part, and the upper straight cylinder part and the lower straight cylinder part are respectively attached to the upper and lower pillars together with the attachment plate and the bolt. You may join. In the case of this configuration, it is preferable that one or both of the bolts on the straight tube portion side and the column side are one-side bolts among the bolts joining the upper and lower straight tube portions and the column of the tapered tube with the attachment plate. Further, the tapered cylinder may be a drawn product of a steel pipe. The "one-sided bolt" referred to in this specification is a general term for a shaft-shaped tightening tool that can be tightened by operating the one end side and plastically deforming the head part at the other end to expand the diameter, and is also called a blind bolt. Has been.

[0006]

[Advantage] According to this structure, since the joints of the tapered cylinders of the upper and lower columns of different diameters are arranged in the middle between the upper and lower beams, the flow of the force acting on the joints is simple and therefore the quality is high. Easy management and cost reduction. In the case where the tapered cylinder has the straight cylindrical portions on the upper and lower sides and the upper and lower columns are bolted together with the attachment plate, the upper and lower columns having different pipe diameters can be easily joined without welding. When one-sided bolts are used as the joining bolts, the joining work can be performed with a closed cross section, which makes the work easier. In this case, if one-side bolts of the type that can be retightened are used, temporary assembly can be easily performed. When the tapered tube is formed by drawing a steel pipe, the member cost can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. Column of different diameter steel pipe column according to this embodiment
In the column-joint structure, the joint between the upper rectangular steel pipe column 1 and the lower rectangular steel pipe column 2 having a larger pipe diameter than the upper rectangular steel pipe column 2 is arranged as shown in FIG. Place it in the middle position of 13,
The upper column 1 and the lower column 2 are joined via a tapered tube 3. The outer diameter of the upper end and the lower end of the tapered tube 3 is the same as the outer diameter of the upper column 1 and the lower column 2.

As shown in the plan view of FIG. 1 (B), the tapered barrel 3 is a rectangular tubular body having a square cross section in which the lower end opening and the upper end opening are aligned at the concentric position, and the taper tubular portion 3a is provided above and below. And upper and lower columns 1 and 2 and straight cylindrical portions 3b and 3c having the same outer diameter. Upper straight tube portion 3b and lower straight tube portion 3c
A plurality of bolt insertion holes 7a, 7b through which the one-side bolt 6 is inserted are formed on each of the four surfaces. The tapered tube 3 is formed by drawing a steel tube, and therefore, the thickness of the tube wall gradually increases from the tapered tube portion 3a to the upper straight tube portion 3b as shown in FIG. 1 (C). The tapered tube 3 may be a cast steel product such as cast iron or cast steel, or a forged product. In this case, the tube wall may have a constant thickness, or may have a gradually changing thickness as described above.

A plurality of bolt insertion holes 8 and 9 through which the one-side bolt 6 is inserted are formed in each of the four surfaces of the lower end of the upper steel pipe column 1 and the upper end of the lower steel pipe column 2. The upper straight tubular portion 3b of the tapered barrel 3 and the lower end of the upper steel tubular column 1, and the lower straight tubular portion 3c of the tapered barrel 3 and the lower end of the lower steel tubular column 2 are respectively one-sided with interposing plates 4 and 5. The bolts 6 are used to join the upper and lower columns 1 and 2 together.
The four upper attachment plates arranged across each surface of the lower end of the upper pillar 1 to the respective surfaces of the upper straight cylindrical portion 3b of the tapered cylinder 3 are aligned with the bolt insertion holes 8 of the upper pillar 1. And a plurality of bolt insertion holes 10b aligned with the bolt insertion holes 7a of the upper straight cylindrical portion 3b of the tapered cylinder 3 are formed. In addition, the lower straight tube portion 3c of the tapered tube 3
The four lower attachment plates 5 arranged across each surface of the lower pillar 2 to the upper surfaces of the lower pillars 2 are aligned with the bolt insertion holes 7b of the lower straight cylindrical portion 3c of the tapered cylinder 3. A plurality of bolt insertion holes 11 a and a plurality of bolt insertion holes 11 b aligned with the bolt insertion holes 9 at the upper end of the lower column 2 are formed.

The bolt connection between the lower end of the upper pillar 1 and the upper straight cylindrical portion 3b of the tapered cylinder 3 is made by connecting the one side bolt 6 from the bolt insertion hole 10a of the upper attachment plate 4 to the corresponding bolt insertion hole 8 of the upper pillar 1. The upper support plate 4 and the upper support plate 4 is fastened and fixed to the lower end of the upper pillar 1.
From the bolt insertion hole 10b to the upper straight tube portion 3 of the tapered tube 3
The one side bolt 6 is penetrated through the corresponding bolt insertion hole 7a of b, and the upper attachment plate 4 is fastened and fixed to the upper straight tube portion 3b of the tapered tube 3. The upper end of the lower column 2 and the lower straight tube portion 3c of the tapered tube 3 are
The one side bolt 6 is penetrated from the bolt insertion hole 11a of the lower attachment plate 5 to the corresponding bolt insertion hole 7b of the lower straight tubular portion 3c of the tapered cylinder 3 to move the lower attachment plate 5 to the lower side of the tapered cylinder 3. The one side bolt 6 is passed through the bolt insertion hole 11b of the lower side support plate 5 and the corresponding bolt insertion hole 9 of the lower side support plate 2 while being tightened and fixed to the straight tubular portion 3c, and the lower side support plate 5 is attached to the lower support side plate 2. It is done by tightening and fixing it on the upper end of the.

FIG. 3 shows an example of the one-side bolt 6 used for the above-mentioned bolt connection. This one side 6 is pin 3
7, a valve sleeve 38, a grip sleeve 39, a shear washer 40, a receiving washer 41, and a nut 4 which are arranged around the pin 37 in order from the pin head 37a side.
Shall have 2. The pin 37 has a break groove 37d in the middle of a threaded portion 37b following the round shaft portion 37e, and a pin head portion 37a having a diameter slightly larger than the pin diameter at the tip.
Further, a short pin tail 37c is provided following the screw portion 37b. The pin tail 37c has an outer diameter surface formed as an uneven surface for preventing slippage. The bubble sleeve 38 is made of a material softer than that of the grip sleeve 39 and is plastically deformable outward in the form of a brim by the load of the axial force. For example, the grip sleeve 39 is made of a hard steel alloy and the bubble sleeve 38 is made of a soft steel alloy. The washer 41 is
An annular groove 41a is formed on the side surface on the pin head side so that the outer peripheral portion of the shear washer 40 fits. The share washer 40 has an inner peripheral portion that engages with the end surface of the grip sleeve 39 and shears with a predetermined axial force. Further, in this example, the round shaft portion 37e of the pin 37 is
The distal end side portion 37e ₁ of the grip sleeve 3 is made slightly larger in diameter than the proximal end side portion 37e ₂ via the step portion 37f.
The inner diameter of 9 is smaller than that of the tip side portion 37e ₁ . The round shaft portion 37e may have the same diameter over the entire length.

The fastening operation of the one side bolt 6 can be performed by using a rotary electric fastening tool (not shown). That is, while the pin tail 37c is gripped by the tightening tool, the nut 42 is tightened by the box-shaped nut engaging portion of the tool. As a result, a compressive force acts between the pin head 37a and the shear washer 40, and the grip sleeve 3
9 and the valve sleeve 38 are sandwiched, and first, the valve sleeve 38 at the tip begins to plastically deform outward in a brim shape. That is, barbing occurs. Round shaft part 3 of pin 37
When 7e is stepped, the above-mentioned barbing occurs until the grip sleeve 39 engages with the step portion 37f. When the nut 42 is further tightened, the shear washer 40 is sheared and the grip sleeve 39 is moved to the shear washer 40.
Enter inside. As a result, when the flange-shaped deformed portion 38a of the valve sleeve 38 engages with the inner surface of the upper column 1 (the lower column 2, the upper straight tubular portion 3b of the tapered barrel 3, the lower straight tubular portion 3c),
Between the nut 42 and the brim-shaped deformed portion 38a, the upper side support plate 4 (lower side support plate 5) and the upper side column 1 (the lower side column 2, the upper straight tubular portion 3b of the tapered barrel 3, the lower straight tubular portion 3c). A tightening axial force is introduced into. When the nut 42 is further tightened and rotated, the pin tail 37c is inserted with a predetermined axial force introduced.
Is broken at the break groove 37d (FIG. 3 (B)).

When this one side bolt 6 is used,
Strong joining can be performed as follows. That is, due to the shearing of the shear washer 40, the tightening force between the nut 42 and the flange-shaped deformed portion 38a of the valve sleeve 38 is the same as that of the upper support plate 4 (lower support plate 5) and the upper post 1 (lower post). 2. The tightening force sandwiches the upper straight tube portion 3b and the lower straight tube portion 3c) of the tapered tube 3, and a strong tightening force is obtained. Further, in the case of this one side bolt 6, the following respective advantages can be obtained. First, since the flange-shaped deformed portion 38a of the valve sleeve 38, which serves as the head of the bolt, greatly expands, the inner support plate 3
The contact pressure with and becomes small, and the bolt hole diameter has a relatively acceptable width. For example, the problem that the edge of the bolt insertion hole 7a is deformed by the contact pressure and the bolt head is fitted is unlikely to occur.
Along with that, the supporting force of the bolt head formed of the collar-shaped deformed portion 38a is improved, the tightening force of the one-side bolt 5 is improved, and the efficiency is improved. Moreover, since the nut 42 is rotated and tightened, it can be tightened twice or retightened. In addition, an electric device is used for tightening, and it is easy to handle at the site.

FIG. 4 shows a second embodiment of the present invention. In the pillar-column joint structure of this embodiment, the one-side bolt 6 used to join the lower straight cylindrical portion 3c of the tapered cylinder 3 and the upper end of the lower pillar 2 in the first embodiment is used. In place of the high-strength bolt 16. The lower end of the upper column 1 and the upper straight tube portion 3b of the tapered tube 3 are joined by the one-side bolt 6 via the upper attachment plate 4, and other configurations are the same as in the case of the first embodiment. In the case of this embodiment, the lower straight cylinder portion 3c of the tapered cylinder 3 and the lower pillar 2 are bolted together by a high-strength bolt 14 in advance at a factory or the like, and the upper straight cylinder portion 3b of the tapered cylinder 3 is connected to the upper straight cylinder portion 3b. The bolt connection with the upper pillar 1 by the one side bolt 6 will be performed later on site. When the high-strength bolt 16 is joined, since the upper end side of the tapered barrel 3 is open, it is possible to easily carry out the joining work by inserting a hand into the tapered barrel 3. The high-strength bolt 16 may be temporarily tightened at first and then fully tightened after being joined by the one-side bolt 6.

FIG. 5 shows a third embodiment of the present invention. In the pillar-column joint structure of this embodiment, the one-side bolt 6 used to join the upper straight cylinder portion 3b of the tapered cylinder 3 and the lower end of the upper pillar 1 in the first embodiment is The high-strength bolt 16 is replaced. The upper end of the lower column 2 and the lower straight tube portion 3c of the tapered tube 3 are joined by the one side bolt 6 via the lower attachment plate 5, and other configurations are the same as in the case of the first embodiment. Is. In the case of this embodiment, the upper straight cylinder portion 3b of the tapered cylinder 3 and the upper pillar 1 are joined by a high-strength bolt 14 in advance in a factory or the like, and the lower straight cylinder portion 3c of the tapered cylinder 3 and the lower cylinder portion 3c are joined together. The bolt connection with the pillar 2 by the one side bolt 6 will be performed later on site.

6 (A) and 6 (B) respectively show a fourth embodiment of the present invention.
And a fifth embodiment is shown. In the pillar-column joint structure (FIG. 6 (A)) of the fourth embodiment, the lower straight cylinder portion 3c of the tapered cylinder 3 and the upper end of the lower pillar 2 are bolted to each other in the first embodiment. Instead of this, it is directly joined by welding 17. The lower end of the upper column 1 and the upper straight tube portion 3b of the tapered tube 3 are joined by the one side bolt 6 via the upper attachment plate 4, and other configurations are the same as in the first embodiment. In addition, the lower straight tube portion 3 of the tapered tube 3
Since c does not require a joining margin of the lower attachment plate 5, its height H ₁ is such that welding can be easily performed, for example, 50 mm.
The degree is enough. In the case of this embodiment, the welding of the lower straight tubular portion 3c of the tapered barrel 3 and the lower column 2 by welding 17 is performed at the factory, and the one-side bolt between the upper straight barrel portion 3b of the tapered barrel 3 and the upper column 1 is welded. Joining by 6 is performed on site. Since the joining by the welding 17 can be performed in the factory, the work and the quality control are facilitated.

The pillar-column joint structure of the fifth embodiment (see FIG. 6).
(B) is the tapered barrel 3 in the first embodiment.
Instead of bolting the upper straight cylindrical portion 3b and the lower end of the upper pillar 1, they are directly joined by welding 17. The upper end of the lower column 2 and the lower straight tube portion 3c of the tapered tube 3
And are joined by the one side bolt 6 via the lower attachment plate 5, and other configurations are the same as in the case of the first embodiment. Also in this case, since the upper straight tube portion 3b of the tapered tube 3 does not require a joining margin of the upper attachment plate 5, its height H ₂ is 50 mm, which is a height at which welding can be easily performed.
The degree is enough. In the case of this embodiment, the upper straight cylinder portion 3b of the tapered cylinder 3 and the upper pillar 1 are joined by welding 17 at the factory, and the one side bolt between the lower straight cylinder portion 3c of the tapered cylinder 3 and the lower pillar 2 is connected. Bolt connection by 6 is performed on site. Also in this case, since the joining by the welding 17 can be performed in the factory, the work and the quality control are easy.

7 (A) to 7 (D) respectively show a sixth embodiment of the present invention.
-The 8th example and its modification are shown. In the pillar-column joint structure (FIG. 7A) of the sixth embodiment, the lower end of the upper pillar 1 and the upper straight cylindrical portion 3b of the tapered cylinder 3 are sandwiched between the two upper and lower attachment plates 4, 4. One side bolt 6 through 14
And the upper end of the lower column 2 and the tapered tube 3
The lower straight cylindrical portion 3c is joined by the one side bolt 6 via the two lower attachment plates 5 and 15 sandwiching these. The upper attachment plate 14 and the lower attachment plate 15 arranged on the back side have the same shape as the upper attachment plate 4 and the lower attachment plate 5 arranged on the front side. Other configurations are first
This is the same as the embodiment. In the case of this embodiment, the upper and lower columns 1,
Since the abutting part between the taper tube 3 and the tapered tube 3 is sandwiched by the two attachment plates 4, 14 (5, 15) on the front and back sides, the two-side shear bolt connection is performed, so that the connection strength is improved. The tapered tube 3 is, for example, a drawn product of a steel pipe as shown in the example of FIG.
When the wall thickness of the tube wall is thicker in the upper straight tube portion 3b,
As shown in FIG. 7D, a liner plate 40 corresponding to the difference in wall thickness from the upper pillar 1 is interposed between the inner surface of the upper pillar 1 and the upper attachment plate 14 on the inner surface side.

The pillar-column joint structure of the seventh embodiment (see FIG. 7).
(B)) is the tapered barrel 3 in the sixth embodiment.
The one side bolt 6 used for joining the lower straight tubular portion 3c and the upper end of the lower column 2 is replaced with a high-strength bolt 16. The lower end of the upper pillar 1 and the upper straight cylindrical portion 3b of the tapered cylinder 3 are joined by the one side bolt 6 via the two upper and lower attachment plates 4 and 14, and other configurations are the same as those of the sixth embodiment. It is similar to the case. In the case of this embodiment, the lower straight cylinder portion 3c of the tapered cylinder 3 and the lower pillar 2 are joined by a high-strength bolt 14 in advance in a factory or the like, and the upper straight cylinder portion 3b of the tapered cylinder 3 and the upper straight cylinder portion 3b are joined together. The bolt connection with the pillar 1 by the one side bolt 6 will be performed later on site.

The pillar-column joint structure of the eighth embodiment (see FIG. 7).
(C) is a one-side bolt 6 used to join the upper straight tubular portion 3b of the tapered barrel 3 and the lower end of the upper column 1 in the sixth embodiment (FIG. 7A). In place of the high-strength bolt 16. Joining the lower end of the upper pillar 1 and the upper straight cylindrical portion 3b of the tapered cylinder 3 with the one side bolt 6 via the two upper and lower attachment plates 4 and 14,
The other configurations are the same as those in the sixth embodiment. In the case of this embodiment, the upper straight tube portion 3b of the tapered tube 3
And the upper pillar 1 are joined by a high-strength bolt 14 at a factory, and the lower straight cylinder portion 3c of the tapered cylinder 3 and the lower pillar 2 are joined by one-side bolts 6 on site.

FIGS. 8A and 8B show ninth and tenth embodiments of the present invention, respectively. The pillar-column joint structure (FIG. 8A) of the ninth embodiment is the same as that of the sixth embodiment (FIG. 7).
In (A)), the lower straight tube portion 3c of the tapered tube 3 and the upper end of the lower column 2 are directly joined by welding 17 instead of being bolted. The lower end of the upper pillar 1 and the upper straight cylindrical portion 3b of the tapered cylinder 3 are joined by the one side bolt 6 via the two upper and lower attachment plates 4 and 14, and other configurations are the same as those of the sixth embodiment. It is similar to the case.

The pillar-column joint structure of the tenth embodiment (see FIG. 8).
In FIG. 7B, in the sixth embodiment (FIG. 7A), instead of bolting the upper straight tubular portion 3b of the tapered barrel 3 and the lower end of the upper column 1, welding 17 is performed. It is directly bonded by. Upper end of lower pillar 2 and tapered barrel 3
The lower straight tube portion 3c is joined with the one side bolt 6 through the two lower attachment plates 5 and 15 on the front and back sides, and other configurations are the same as in the sixth embodiment.

In each of the above-mentioned embodiments, as the tapered cylinder 3, as shown in a plan view in FIG. 1B, a rectangular cylindrical body having a square cross section in which the lower end opening and the upper end opening are arranged concentrically is used. As shown in the plan view of FIG. 9A, the lower straight tubular portion 3
A taper shape in which the tapered cylindrical portion 3a and the upper straight cylindrical portion 3b are eccentric with respect to the lower straight cylindrical portion 3c so that one side surface is flush with the tapered cylindrical portion 3a and the upper straight cylindrical portion 3b. The cylindrical tube 3A may be used. In addition, FIG.
As shown in a plan view in (B), two adjacent two are astride the lower straight tubular portion 3c and the taper tubular portion 3a and the upper straight tubular portion 3b.
You may use the taper cylinder 3B of the shape which made the taper cylinder part 3a and the upper straight cylinder part 3b eccentric to one corner | angular part side with respect to the lower straight cylinder part 3c so that two side surfaces may become flush. The tapered cylinders 3, 3A and 3B shown in FIGS. 1B and 9A and 9B can be used properly as shown in a plan view of FIG. 9C, for example. That is, the non-eccentric tapered cylinder 3 is located inside the building, the tapered cylinder 3A eccentric to one side is located at an intermediate position on the outer circumference of the building, and the tapered cylinder 3B eccentric to the corner is located at a corner of the building circumference. Place each. As a result, the upper straight cylindrical portions 3b of the tapered cylinders 3A and 3B can be arranged at positions along the outer peripheral edge of the building, and it becomes easy to finish the outer wall surface of the building on the same plane, and the pillar centers of the upper pillars are concentric. Thus, the beams joined between these upper columns can be aligned at the concentric position.

10 and 11 show an eleventh embodiment of the present invention. In the column-column joint structure of this embodiment, the joint between the upper round steel pipe column 1A and the lower round steel pipe column 2A having a larger pipe diameter is used as in the case of FIG. 2 (B). Via the tapered cylinder 23, which is arranged at an intermediate position between the upper floor beam 12 and the lower floor beam 13 and whose outer diameters at the upper and lower ends are the same as the outer diameters of the upper column 1A and the lower column 2A. , The upper pillar 1
A and the lower side pillar 2A are joined.

As shown in the plan view of FIG. 10 (B), the tapered cylinder 23 is a cylindrical body having its lower end opening and upper end opening aligned in a concentric position. , 2B, the outer diameter of which is the same as that of the straight cylindrical portions 23b, 23.
c respectively. A plurality of bolt insertion holes for inserting the one-side bolt 6 in the upper straight tube portion 23b and the lower straight tube portion 23c at a plurality of positions in the circumferential direction, for example, in three equally divided positions, as in the first embodiment (FIG. 1). 7a and 7b are formed, respectively.

Lower end of upper steel pipe column 1A and lower steel pipe column 2
Also at the upper end of B, the bolt insertion hole 7 of the tapered tube 23
A plurality of bolt insertion holes 8 and 9 through which the one-side bolt 6 is inserted are formed at three circumferentially divided positions corresponding to the positions a and 7b, respectively, as in the first embodiment (FIG. 1). There is. The upper straight tube portion 23b of the tapered tube 23 and the lower end of the upper steel pipe column 1A, and the lower straight tube portion 23c of the tapered tube 23.
And the lower end of the lower steel pipe column 2A are attached plates 24, 2 respectively.
The upper and lower pillars 1A and 2A are joined to each other by the one-sided bolt 6 through 5. The three upper attachment plates 24 arranged across the surface of the lower end of the upper column 1A and the surface of the upper straight cylindrical portion 23b of the tapered cylinder 23 include the attachment plates 4 of the first embodiment (FIG. 1). Similarly, a plurality of bolt insertion holes 10a aligned with the bolt insertion holes 8 of the upper pillar 1A and a plurality of bolt insertion holes 10b aligned with the bolt insertion holes 7a of the upper straight tubular portion 23b of the tapered cylinder 23 are formed. There is. In addition, the lower straight cylinder of the tapered cylinder 23 is also included in the three lower attachment plates 25 arranged across the surface of the lower straight cylinder portion 23c of the tapered cylinder 23 and the surface of the upper end of the lower pillar 2. A plurality of bolt insertion holes 11a aligned with the bolt insertion holes 7b of the portion 23c,
A plurality of bolt insertion holes 11b aligned with the bolt insertion holes 9 at the upper end of the lower column 2A are formed. These upper side support plate 24 and lower side support plate 25 are shown in FIG.
As shown in (C), the upper and lower pillars 1A, 2A and the corresponding upper and lower straight cylindrical portions 23b, 23c of the tapered cylinder 23 are arc-shaped plates having an inner diameter surface with a smaller radius of curvature than the outer diameter surfaces, and are bolted to both sides. I'm trying to blend in. This improves the adhesion of the contact surfaces of the attachment plates 24, 25.

The lower end of the upper column 1A and the upper straight tube portion 23b of the tapered tube 23 are bolted to each other in the same manner as in the first embodiment (FIG. 1). That is, from the bolt insertion hole 10a of the upper attachment plate 24 to the corresponding bolt insertion hole 8 of the upper pillar 1A.
The one-side bolt 6 is passed through the upper support plate 24 and the upper support plate 24 is fastened and fixed to the lower end of the upper column 1A. In addition, from the bolt insertion hole 10b of the upper attachment plate 24 to the tapered tube 23
The one-sided bolt 6 is passed through the corresponding bolt insertion hole 7a of the upper straight tubular portion 23b, and the upper attachment plate 24 is fastened and fixed to the upper straight tubular portion 23b of the tapered tubular member 23. Also for the upper end of the lower pillar 2A and the lower straight cylindrical portion 23c of the tapered cylinder 23, the bolt insertion hole 11 of the lower attachment plate 25
The one side bolt 6 is penetrated from a to the corresponding bolt insertion hole 7b of the lower straight tubular portion 23c of the tapered barrel 23, and the lower attachment plate 25 is attached to the lower straight tubular portion 23 of the tapered barrel 23.
Tighten and fix to c. In addition, from the bolt insertion hole 11b of the lower attachment plate 25 to the corresponding bolt insertion hole 9 of the lower pillar 2A.
The one-sided bolt 6 is passed through the lower support plate 25 and the lower support plate 25 is fastened and fixed to the upper end of the lower column 2A.

FIG. 12 shows a twelfth embodiment of the present invention. The pillar-column joint structure of this embodiment is similar to the eleventh embodiment (FIG. 10) in that the lower straight tube portion 2 of the tapered tube 23 is
The one-side bolt 6 used to join the upper end of the lower pillar 2A with 3c is replaced with a high-strength bolt 16. The lower end of the upper pillar 1A and the upper straight cylinder portion 23b of the tapered cylinder 33 are connected to the one side bolt 6 via the upper attachment plate 24.
The joining and other structures are the same as in the eleventh embodiment. In the case of this embodiment, the tapered tube 2
High-strength bolt 14 between the lower straight tubular portion 23c of the third column 2c and the lower column 2A
Is first performed in the factory, and the upper straight tube portion 23b of the tapered tube 23 and the upper column 1A are joined by the one side bolt 6 on site.

FIG. 13 shows a thirteenth embodiment of the present invention. The pillar-column joint structure of this embodiment is similar to the eleventh embodiment (FIG. 10) in that the upper straight cylindrical portion 2 of the tapered cylinder 23 is
3b and the one side bolt 6 used for joining the lower end of the upper side pillar 1A were replaced with the high-strength bolt 16. The upper end of the lower pillar 2A and the lower straight cylindrical portion 23c of the tapered cylinder 23 are connected to the one side bolt 6 via the lower attachment plate 25.
The joining and other structures are the same as in the eleventh embodiment.

FIG. 14 shows a fourteenth embodiment of the present invention. The pillar-column joint structure of this embodiment is similar to the eleventh embodiment (FIG. 10) in that the lower straight tube portion 2 of the tapered tube 23 is
3c and the upper end of the lower column 2A are joined by bolts instead of being joined by bolts. The lower end of the upper pillar 1A and the upper straight cylindrical portion 23b of the tapered cylinder 23 are joined by the one-side bolt 6 via the upper attachment plate 24, and other configurations are the same as in the eleventh embodiment. In addition, the lower straight tube portion 23 of the tapered tube 23
Since c does not require a joining margin of the lower attachment plate 25, the height H ₁ thereof may be a height at which welding can be easily performed, for example, about 50 mm.

FIG. 15 shows a fifteenth embodiment of the present invention. The pillar-column joint structure of this embodiment is similar to the eleventh embodiment (FIG. 10) in that the upper straight cylindrical portion 2 of the tapered cylinder 23 is
3b and the lower end of the upper column 1A are joined by bolts instead of being joined by bolts. The upper end of the lower pillar 2A and the lower straight cylindrical portion 23c of the tapered cylinder 23 are joined by the one side bolt 6 via the lower attachment plate 25, and other configurations are the same as in the eleventh embodiment. Is. Also in this case, since the upper straight tube portion 23b of the tapered tube 23 does not require a joining margin of the upper attachment plate 24, the height H ₂ thereof may be about 50 mm.

FIG. 16 shows a sixteenth embodiment of the present invention. In the pillar-column joint structure of this embodiment, the lower end of the upper pillar 1A and the upper straight cylinder portion 23b of the tapered cylinder 23 are connected to each other by the one-side bolt 6 via two upper and lower attachment plates 24 and 34 sandwiching them. In addition to joining, the upper end of the lower pillar 2A and the lower straight tubular portion 23c of the tapered barrel 23 are joined by the one side bolt 6 via the two lower backing plates 25 and 35 sandwiching them. is there. The upper attachment plate 34 and the lower attachment plate 35 arranged on the back side are arc-shaped plates having substantially the same cross section as the upper attachment plate 24 and the lower attachment plate 25 arranged on the front side. It should be noted that these attachment plates 34 and 35 are shown in FIG.
As shown in (B) and (C), the radius of curvature of the outer diameter surface is made larger than the inner diameter surfaces of the corresponding upper and lower columns 1A and 2A and the upper and lower straight cylindrical portions 23b and 23c of the tapered cylinder 23, and the upper and lower portions are changed in accordance with bolt tightening. It is adapted to the surface of the pillars 1A, 2A and the like.

17A and 17B show a seventeenth embodiment of the present invention.
An example of is shown. The pillar-column joining structure of this embodiment is used to join the lower straight cylindrical portion 23c of the tapered cylinder 23 and the upper end of the lower pillar 2A in the sixteenth embodiment (FIG. 16). The one-side bolt 6 is replaced with a high-strength bolt 16. Lower end of upper pillar 1A and tapered tube 23
The upper straight tube portion 23b of the
Connection with the one-side bolt 6 via 4 and other configurations are the same as in the 16th embodiment.

17C and 17D show an eighteenth embodiment of the present invention.
An example of is shown. The pillar-column joint structure of this embodiment is similar to that of the sixteenth embodiment (FIG. 16), except that the tapered tube 23
The one side bolt 6 used to join the upper straight cylindrical portion 23b of the above and the lower end of the upper column 1A is replaced with the high strength bolt 16
Instead of. Lower end of upper pillar 1A and tapered barrel 2
The upper straight tube portion 23b of 3 and the upper back plate 24 of two front and back,
The connection with the one-side bolt 6 via 34 and other configurations are the same as in the 16th embodiment.

FIG. 18 shows a nineteenth embodiment of the present invention. The pillar-column joint structure of this embodiment is similar to the sixteenth embodiment (FIG. 16) in that the lower straight tube portion 2 of the tapered tube 23 is
3c and the upper end of the lower column 2A are joined by bolts instead of being joined by bolts. The lower end of the upper column 1A and the upper straight tube portion 23b of the tapered tube 23 are joined by the one-side bolt 6 via the two upper and lower attachment plates 24 and 34, and other configurations are the first.
This is similar to the case of the sixth embodiment. The tapered tube 23
Since the lower straight plate portion 23c does not require a joining margin for the lower attachment plates 25 and 35, the height H ₁ thereof may be about 50 mm.

FIG. 19 shows a twentieth embodiment of the present invention. The pillar-column joint structure of this embodiment is similar to the sixteenth embodiment (FIG. 16) in that the upper straight tube portion 2 of the tapered tube 23 is formed.
3b and the lower end of the upper column 1A are joined by bolts instead of being joined by bolts. The upper end of the lower pillar 2A and the lower straight tubular portion 23c of the tapered barrel 23 are joined by the one-side bolt 6 via the two lower backing plates 25 and 35 on the front and back sides, and other configurations are the first.
This is similar to the sixth embodiment. Also in this case, the tapered tube 23
Since the upper straight tube portion 23b does not require a joint margin for the upper attachment plates 24 and 34, the height H ₂ may be about 50 mm.

In the first to twentieth embodiments, as the tapered cylinder 23, a cylindrical body having a lower end opening and an upper end opening arranged in a concentric position is used as shown in a plan view of FIG. However, as shown in a plan view in FIG. 20, the lower straight tubular portion 2 is so arranged that a part of these surfaces is aligned across the lower straight tubular portion 23c and the taper tubular portion 23a and the upper straight tubular portion 23b.
3c, the tapered cylindrical portion 23a and the upper straight cylindrical portion 23b
A tapered cylinder 23A having a decentered shape may be used.

[0038]

EFFECTS OF THE INVENTION In the column-column joint structure for steel pipe columns of different diameters according to the present invention, since the joints of the upper and lower columns by the tapered cylinder are arranged between the upper and lower beams, the structure can be simplified. It is easy to process and assemble, the transmission of the force acting on the joint is simple, and the quality control is easy. Therefore, the upper and lower columns with different pipe diameters can be easily joined with a simple structure,
It leads to cost reduction. In the case of the invention of claim 2, since the upper and lower pillars have a straight cylindrical portion whose outer diameter is the same as that of the upper and lower pillars, the upper and lower pillars having different pipe diameters are bolted together with the attachment plate. , Can be easily joined without welding. In the case of the invention of claim 3, among the bolts joined by the attachment plate, one or both of the bolts on the straight cylinder portion side and the column side are one-sided bolts, so that a back nut is internally provided to the column of the closed cross section. Since it is not necessary to perform welding or the like, the joining work becomes easier. In the case of the invention of claim 4, since the tapered cylinder is a drawn product of a steel pipe, the member cost is low and an inexpensive joining structure can be obtained.

[Brief description of drawings]

FIG. 1A is an exploded perspective view of a pillar / column joint structure according to a first embodiment of the present invention, FIG. 1B is a plan view of a tapered cylinder used in the joint structure, and FIG. It is a longitudinal cross-sectional view of a tapered cylinder.

FIG. 2A is a perspective view of the same embodiment, and FIG. 2B is a front view showing a part of a steel frame structure of a building adopting the same embodiment.

FIG. 3 is a cross-sectional view showing a usage example of the one-side bolt used in the embodiment.

FIG. 4A is an exploded perspective view of a pillar-column joint structure according to a second embodiment of the present invention, FIG. 4B is a horizontal sectional view of a lower end joint portion of a tapered cylinder in the same embodiment, and FIG. [Fig. 3] is a horizontal sectional view of an upper end joint portion of the same tapered cylinder.

FIG. 5A is an exploded perspective view of a pillar-column joint structure of a third embodiment of the present invention, FIG. 5B is a horizontal sectional view of a lower end joint portion of a tapered cylinder in the same embodiment, and FIG. [Fig. 3] is a horizontal sectional view of an upper end joint portion of the same tapered cylinder.

6 (A) and 6 (B) are exploded perspective views of pillar-column joint structures according to fourth and fifth embodiments of the present invention, respectively.

7 (A) to (D) are partially cutaway front views of pillar-column joint structures of sixth to eighth embodiments of the present invention and their modifications, respectively.

8 (A) and 8 (B) are partially cutaway front views of pillar-column joint structures according to ninth and tenth embodiments of the present invention, respectively.

9A and 9B are plan views showing modified examples of the tapered cylinder, and FIG. 9C is a plan view of a steel frame structure of a building in which the tapered cylinder of each modified example is used properly.

FIG. 10A is an exploded perspective view of a pillar-column joint structure according to an eleventh embodiment of the present invention, and FIG. 10B is a plan view of a tapered cylinder used in the joint structure.

11A is a perspective view of the same embodiment, FIG. 11B is a cutaway plan view showing the relationship between the attachment plate and the pillar and the tapered cylinder in the same embodiment, and FIG. 11C is a view of FIG. FIG.

FIG. 12 (A) is an exploded perspective view of a pillar / column joint structure according to a twelfth embodiment of the present invention, (B) is a horizontal sectional view of a lower end joint portion of a tapered cylinder in the same embodiment, (C). [Fig. 3] is a horizontal sectional view of an upper end joint portion of the same tapered cylinder.

FIG. 13 (A) is an exploded perspective view of a pillar-column joint structure of a thirteenth embodiment of the present invention, (B) is a horizontal sectional view of a lower end joint portion of a tapered cylinder in the same embodiment, (C). [Fig. 3] is a horizontal sectional view of an upper end joint portion of the same tapered cylinder.

FIG. 14 is an exploded perspective view of a pillar-column joint structure of a fourteenth embodiment of the present invention.

FIG. 15 is an exploded perspective view of a pillar-column joint structure of a fifteenth embodiment of the present invention.

FIG. 16A is an exploded perspective view of a pillar-column joint structure of a sixteenth embodiment of the present invention, and FIG. 16B is a fracture plane showing the relationship between the attachment plate and the pillar and the tapered cylinder in the embodiment. Figure,
(C) is a partially enlarged view of FIG.

17 (A) and 17 (B) are horizontal cross-sectional views of the lower end joint portion of the tapered cylinder and the upper end joint portion of the tapered cylinder in the pillar-column joint structure of the seventeenth embodiment of the present invention. Figures (C) and (D) are pillars of the eighteenth embodiment of the present invention.
It is a horizontal cross-sectional view of the lower end joint portion of the tapered cylinder and the upper end joint portion of the same tapered cylinder in the column joint structure.

FIG. 18 is a perspective view of a pillar / column joint structure of an eighteenth embodiment of the present invention.

FIG. 19 is a perspective view of a pillar / column joint structure according to a nineteenth embodiment of the present invention.

FIG. 20 (A) is a perspective view of a pillar / column joining structure according to a twentieth embodiment of the present invention, and FIG. 20 (B) is a plan view showing each modification of the tapered cylinder.

FIG. 21 is a front view of a conventional example.

[Explanation of symbols]

1,1A ... upper side pillar, 2,2A ... lower side pillar, 3,3A, 3
B, 23, 23A ... Tapered cylinder, 3a, 23a ... Tapered cylinder part, 3b, 3c, 23b, 23c ... Straight cylinder part, 4, 5,
14, 15, 24, 25, 34, 35 ... Support plate, 6 ... One-side bolt, 12 ... Upper beam, 13 ... Lower beam, 16 ...
High-strength bolt, 17 ... Welding

Claims (4)

[Claims] 1. An upper column and a lower column, each of which is a steel pipe column, are joined to each other through a tapered tube whose upper and lower ends have the same outer diameter as the upper column and the lower column. A column-column connection structure of steel pipe columns with different diameters where the part is placed between the upper and lower beams. 2. The tapered cylinder has a straight cylinder part having the same outer diameter as the upper and lower pillars, which is continuous with the upper and lower sides of the tapered cylinder part,
The column-column joining structure for steel pipe columns of different diameters according to claim 1, wherein the upper straight tubular portion and the lower straight tubular portion are bolt-joined to the upper and lower columns together with the attachment plate. 3. The one or both of the bolts on the straight cylinder side and the pillar side of the bolts joining the upper and lower straight cylinders of the tapered cylinder and the pillar with the attachment plate are one-sided bolts. Column-column joint structure of steel pipe columns with different diameters. 4. The column-column joining structure for steel pipe columns of different diameters according to claim 1, 2 or 3, wherein the tapered cylinder is a drawn product of a steel pipe.