JP2020007757A - Column connection structure and column connection method - Google Patents

Abstract

To provide a column connection structure and a column connection method capable of simplifying a welding step using an automatic welder, and capable of securing connection position accuracy.SOLUTION: A column connection structure 1 includes: a lower column 10 having a diaphragm 14 at an upper end; an upper column 20 whose lower end 22 is welded to the diaphragm 14; and a connection member 30 whose upper end part 32 is fixed to a side surface of the upper column 20, whose lower end part 31 is fixed to the diaphragm 14, and in which a work interval 34 where an automatic welder 40 can pass is formed between an intermediate part 33 and the side surface of the upper column 20.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a pillar connection structure and a pillar connection method.

In a steel structure building, steel columns and beams that have been factory-built in advance are carried into a building site and are sequentially connected by welding. Tubular steel pipe columns are often used for steel columns, and in addition to welding the steel pipe columns slightly above the beam-column joint, welding of the upper diaphragm of the beam-column joint to the steel pipe column has been proposed (Patent Documents) 1).
Automation of robots (automatic welding machines) has been advanced for welding steel pipe columns.
For example, an annular rail is installed around an end of a steel pipe column, and an automatic welding machine is run along the rail to weld the entire circumference of the steel pipe column (see Patent Document 2).
The welding of the upper diaphragm of the beam-column joint and the steel pipe column proposed in Patent Literature 1 has a welding posture bent down to the feet by hand, and is difficult to perform. However, robot welding is easy.
In robot welding between steel pipe columns, erection pieces are used to increase mutual positional accuracy. In order to avoid interference between the erection piece and the automatic welding machine, it has been proposed to limit the moving range of the automatic welding machine for each section and finely adjust the direction of the automatic welding machine depending on the welding position (see Patent Document 3). .
In addition, for the erection piece along the surface of the steel pipe column, a shaft member called “Kirin” that can be adjusted in expansion and contraction is used between the column and the nearest beam upper surface (see Patent Document 4). However, the purpose of this shaft member is to control the overall posture of the steel column, and is different from the purpose of increasing the positional accuracy of the connection portion between the columns.

JP-A-6-158717 JP 2000-135594 A JP 2018-53626 A JP-A-1-239268

According to Patent Document 3 described above, even when an erection piece is used for connecting steel pipe columns, a revolving-type automatic welding machine can be used. However, in Patent Literature 3, there is a problem that the movement of the automatic welding machine is performed in each section, so that the entire circumference of the column cannot be continuously welded, and the welding process is complicated.
On the other hand, without a positioning means such as an erection piece, it was difficult to improve the horizontal positional accuracy when connecting the steel pipe columns.

  An object of the present invention is to provide a column connection structure and a column connection method that can simplify a welding process using an automatic welding machine and ensure connection position accuracy.

  The pillar connection structure of the present invention includes a lower pillar having a diaphragm at an upper end, an upper pillar having a lower end welded to the diaphragm, an upper end fixed to a side surface of the upper pillar, and a lower end having the diaphragm or the diaphragm. A connection member fixed to a building member fixed to the connection member, wherein a working interval through which an automatic welding machine can pass is formed between an intermediate portion between the upper end portion and the lower end portion and a side surface of the upper column. It is characterized by having.

In the present invention, the other end of the connecting member and the diaphragm may be directly fixed, or indirectly fixed via another building member such as a beam connected to the side surface of the lower pillar. You may.
In the present invention, since the lower end of the upper column is welded and fixed to the surface of the diaphragm of the lower column, the horizontal positional accuracy required at the time of welding can be eased as compared with the case where the column ends are flat-welded. . Therefore, as a positioning means for the upper column and the lower column at the time of welding, instead of an erection piece directly connected to the side surface of each column, a connecting member separated from the side surface of the upper column by a working interval can be used. As a result, an annular space including the working interval is formed around the upper pillar, and the automatic welding machine makes a round through this space, so that the entire periphery welding between the lower end of the upper pillar and the diaphragm can be performed collectively. Thus, the welding process using the automatic welding machine can be simplified, and the connection position accuracy can be ensured.

In the pillar connection structure of the present invention, it is preferable that the connection member has a rod-like shape and is arranged so as to be inclined away from the side surface of the upper pillar as it approaches the lower end.
According to the present invention, a large working space can be secured around the side surface near the lower end of the upper column, and the structure can be simplified because the rod-shaped connecting member is used.

In the pillar connection structure of the present invention, it is preferable that the connection member has a telescopic mechanism for adjusting a length from the upper end to the lower end.
In the present invention, by adjusting the length from the upper end to the lower end by the expansion and contraction mechanism, it is possible to match the actual dimensions from the fixed portion to the upper column to the fixed portion to the lower column. Further, by operating the expansion and contraction mechanism while the upper end and the lower end are connected, the arrangement and the angle of the upper pillar with respect to the lower pillar can be adjusted.

In the pillar connection structure of the present invention, it is preferable that a positioning member for positioning the upper pillar is fixed to the diaphragm.
According to this aspect of the invention, the positioning member fixed to the diaphragm allows the upper column to be positioned in the horizontal direction with respect to the diaphragm, thereby assisting the positioning by the connecting member. That is, the positioning of the diaphragm and the upper pillar by the connection member is an indirect positioning function that is separated from the respective connection portions by a working interval. Here, by adding a direct positioning function by a positioning member fixed to the diaphragm, positioning accuracy can be improved.
At this time, the positioning member may be installed on the surface of the diaphragm inside the upper pillar and engage with the lower end of the upper pillar, for example, and may be installed on the outer side of the upper pillar like an erection piece to pass through the automatic welding machine. There is no hindrance. Therefore, by positioning the diaphragm and the upper column with the connecting member and the positioning member, the automatic welding machine is installed in the annular space including the working interval while sufficiently securing the connection accuracy between the upper column and the lower column. It becomes possible to pass.

In the pillar connection structure of the present invention, it is preferable that the positioning member is an annular backing member that can be fitted inside a lower end of the upper pillar.
In the present invention, the backing member used for welding the upper column and the lower column can be used also as a positioning member for positioning the upper column, and the structure can be simplified.
In addition, a contact member that contacts the backing member inserted from below is installed inside the upper pillar, so that a desired groove is secured between the lower end of the upper pillar and the diaphragm. Is desirable.

In the pillar connection structure of the present invention, the positioning member is a plurality of engaging members arranged in a circumferential direction, and the engaging members are respectively attached to a backing member fixed inside a lower end of the upper pillar. Preferably, it is engageable.
In the present invention as described above, the backing member fixed to the upper pillar can be positioned by the engaging member fixed to the diaphragm, and the positioning member applied to the diaphragm can be simplified.

In the pillar connection structure of the present invention, the lower pillar has a beam-to-column joint at an upper end side, a beam extending laterally is connected to the beam-to-column joint, and the diaphragm is a beam-to-column joint. Is preferably arranged at the same height as the upper surface of the beam.
In the present invention as described above, the configuration of the present invention can be realized by using the diaphragm used for the ordinary beam-column joint, and an increase in the number of parts and an increase in cost can be avoided.
The diaphragm constituting the present invention may be separate from the diaphragm used for the beam-column joint. For example, a short column is installed on the upper surface of the upper diaphragm of the beam-column joint, and the connection diaphragm is provided at the upper end thereof. May be fixed, and the upper column may be connected to the diaphragm.

The pillar connection method of the present invention is a pillar connection method of welding and connecting an upper end surface of a lower pillar and a lower end surface of an upper pillar, wherein a diaphragm is formed at an upper end of the lower pillar, and an upper end is formed of the upper pillar. A connecting member fixed to the side surface and a lower end portion fixed to the diaphragm or a building member fixed to the diaphragm is provided, and a predetermined working interval is formed between the connecting member and the side surface of the upper pillar. In addition, an automatic welding machine is installed at the work interval, the automatic welding machine makes a round along the side surface of the upper column, and the lower end of the upper column is welded to the diaphragm over the entire circumference.
In the present invention as described above, it is possible to obtain the same functions and effects as described in the column connection structure of the present invention.

In the column connection method of the present invention, it is preferable that a positioning member is fixed to the diaphragm, and the upper column is positioned by the positioning member when installing the connection member.
According to the present invention, it is possible to obtain the same effects as those described above regarding the positioning member in the pillar connection structure of the present invention.

In the pillar connection method of the present invention, it is preferable that the positioning member is an annular backing member that can be fitted inside a lower end of the upper pillar.
According to the present invention, it is possible to obtain the same effects as those described above with respect to the positioning member using the backing member in the pillar connection structure of the present invention.

In the pillar connection method of the present invention,
It is preferable that the positioning member is a plurality of engaging members arranged in a circumferential direction, and the engaging members are respectively engageable with a backing member fixed inside a lower end of the upper pillar. .
In the present invention as described above, it is possible to obtain the same operational effects as described above with respect to the positioning member using the engaging member that engages with the backing member in the pillar connection structure of the present invention.

  Advantageous Effects of Invention According to the present invention, it is possible to provide a column connection structure and a column connection method that can simplify a welding process using an automatic welding machine and ensure connection position accuracy.

1 is a side view showing a first embodiment of a pillar connection structure of the present invention. The side view which shows the state which decomposed | disassembled the pillar connection structure of the said 1st Embodiment. FIG. 3 is a plan view showing the column connection structure of the first embodiment. FIG. 3 is a cross-sectional view showing a positioning member before connection according to the first embodiment. FIG. 4 is a cross-sectional view showing the positioning member after connection according to the first embodiment. Sectional drawing which shows the positioning member before connection of 2nd Embodiment of this invention. Sectional drawing which shows the positioning member after the connection of the said 2nd Embodiment. The side view which shows 3rd Embodiment of the pillar connection structure of this invention. The side view showing a 4th embodiment of the pillar connection structure of the present invention.

[First Embodiment]
1 to 5 show a first embodiment of a pillar connection structure of the present invention.
1 to 3, a pillar connection structure 1 is formed by connecting a lower pillar 10 and an upper pillar 20.
The lower pillar 10 has a vertically arranged hollow steel tube pillar 11 having a rectangular cross section, and has a beam-column joint 12 at the upper end thereof.
The beam-to-column joint 12 has a short intermediate column 13 which has the same cross section as the steel tube column 11 but has a short length. Diaphragms 14 and 15 are fixed to the upper and lower surfaces, respectively, by full circumference welding. The beam-to-column joint 12 is fixed to the steel pipe column 11 by welding the entire upper end of the steel pipe column 11 to the lower diaphragm 15.

H-shaped steel beams 16 are connected to the side surfaces of the beam-column joint 12, respectively. The beam 16 fixed to the beam-column joint 12 is a short connection, and a series of beams is formed by separately connecting long beams.
The upper and lower flanges 161 and 162 of the beam member 16 are arranged at the same height as the diaphragms 14 and 15, respectively, and their edges are fixed by welding. The web 163 of the beam 16 is fixed to the side surface of the intermediate column 13 by welding.
A bracket 17 is formed on the beam member 16 at a position on the upper surface of the upper flange 161 away from the beam-column joint 12.

The upper column 20 has a steel column 21 having the same cross section as the steel column 11, and a lower end 22 thereof is connected to the upper surface of the diaphragm 14 of the lower column 10. A bracket 27 is formed on a side surface of the steel pipe column 21 at a position away from the lower end 22.
The bracket 27 of the upper pillar 20 and the bracket 17 of the lower pillar 10 are connected by a connecting member 30.

  The connection member 30 has an intermediate portion 33 formed of a steel pipe, an upper end portion 32 connected to the bracket 27 of the upper column 20 with a bolt nut, and a lower end portion 31 connected to the bracket 17 of the lower column 10 with a bolt nut. As a result, the lower end 31 of the connection member 30 is fixed to the diaphragm 14 via the beam 16 as a building member. The building member is not limited to the beam member 16, but may be another member fixed to the diaphragm 14. Further, the diaphragm 14 may be extended and the bracket 17 may be directly fixed to the diaphragm 14.

The connecting member 30 is provided with a telescopic mechanism 35 between the intermediate portion 33 and the lower end portion 31. The expansion / contraction mechanism 35 is constituted by a so-called “Kirin” having a screw shaft in the longitudinal direction of the connection member 30 and a nut screwed to the connection member 30, and operating the pin outside the nut to rotate the nut, thereby connecting the connection member 30. Can be extended and contracted in the longitudinal direction.
In the connection member 30, the length from the upper end 32 to the lower end 31 can be adjusted by expanding and contracting the expansion mechanism 35, and the connection between the bracket 27, which is a fixed portion to the upper column 20, and the lower column 10, Can be adjusted to the actual dimensions up to the bracket 17 which is the fixed part of the bracket. By operating the expansion / contraction mechanism 35 with the upper end 32 and the lower end 31 connected, the arrangement and angle of the upper pillar 20 with respect to the lower pillar 10 can be adjusted.

Since the bracket 27 is formed on the surface of the steel pipe column 21 and the bracket 17 is formed at a position apart from the beam-to-column joint 12 of the beam 16, the connecting member 30 has a lower end 31 with respect to the upper end 32. The closer to, the more distant it is from the steel tube column 21.
When assembled as the column connection structure 1 (see FIG. 1), a work space 34 having an intended width is formed between the intermediate portion 33 of the connection member 30 and the surface of the steel pipe column 21. An annular space including the working interval 34 is formed inside the connection member 30 around the vicinity of the lower end 22 of the steel pipe column 21.

When the lower column 10 and the upper column 20 are connected, an automatic welding machine 40 for performing full circumference welding is installed in the annular space including the working interval 34 described above.
The automatic welding machine 40 has an annular rail 41 mounted around the steel pipe column 21, and a torch 42 that can circulate along the rail 41. The torch 42 can make a round of the welded portion between the periphery of the lower end 22 of the steel pipe column 21 and the diaphragm 14 by passing through the annular space including the working interval 34.

In order to position the lower end 22 of the steel pipe column 21 to be welded and the diaphragm 14 in the horizontal direction, the diaphragm 14 is provided with a positioning member.
4 and 5, on the surface of the diaphragm 14, a backing member 51 as a positioning member is provided. The backing member 51 is an annular steel material that can be fitted inside the lower end 22 of the steel pipe column 21, and is intermittently or continuously welded and fixed to the surface of the diaphragm 14 from the inside.

A plurality of contact members 52 are fixed to the inside of the steel pipe column 21 at a predetermined height from the lower end by welding at predetermined intervals in the circumferential direction. In addition, the contact member 52 may be a continuous member that goes around the inside of the steel pipe column 21.
When the backing member 51 fixed to the diaphragm 14 is fitted from the lower end 22 of the steel pipe column 21, the upper end of the backing member 51 comes into contact with the contact member 52, and beyond that, the steel pipe column 21 and the diaphragm 14 Stops approaching. In this state, a predetermined gap is formed between the lower end 22 of the steel pipe column 21 and the surface of the diaphragm 14, and the gap is closed by the backing member 51 from the back side, and is welded by the torch 42 of the automatic welding machine 40. It becomes possible (see FIG. 5).

In the first embodiment, the pillar connection structure 1 is assembled in the following procedure, and the lower pillar 10 and the upper pillar 20 are connected.
First, the steel column 11, the intermediate column 13, the diaphragms 14, 15 and the beam 16 are welded to assemble the lower column 10 at the factory, and the upper column 20 is formed by the steel column 21. The bracket 17 and the backing member 51 are welded to the lower pillar 10. The bracket 27 and the contact member 52 are welded to the upper column 20. Further, the connection member 30 is prepared.

The manufactured lower pillar 10, upper pillar 20, and connecting member 30 are transported to a construction site and are sequentially assembled.
First, after fixing the lower column 10, the upper column 20 is suspended and arranged on the upper surface side of the lower column 10. Then, the lower column 10 and the upper column 20 are connected by the connecting member 30, and the lower end 22 of the upper column 20 is placed directly above the backing member 51 of the diaphragm 14 by adjusting the fixed position of both ends of the connecting member 30. (See FIG. 4).
Next, the upper pillar 20 is lowered, and the backing member 51 is fitted into the upper pillar 20 from the lower end 22 so that the backing member 51 is in contact with the contact member 52.
Then, the automatic welding machine 40 is mounted on the steel pipe column 21 and the torch 42 is moved along the rail 41, thereby welding the lower end 22 of the steel pipe column 21 to the entire surface of the diaphragm 14 (see FIG. 5).
As described above, the lower column 10 and the upper column 20 are welded.

According to this embodiment, the following effects can be obtained.
In the present embodiment, since the lower end 22 of the upper column 20 is fixed to the surface of the diaphragm 14 of the lower column 10 by welding, the horizontal positional accuracy required at the time of welding is reduced as compared with the case where the column ends are flat-welded. Can be relaxed. For this reason, as the positioning means of the upper pillar 20 and the lower pillar 10 at the time of welding, not the erection piece directly connected to the side face of each pillar, but the connecting member 30 separated from the side face of the upper pillar 20 by a working interval. be able to. As a result, an annular space including the working interval 34 is formed around the upper column 20, and the automatic welding machine 40 makes a round through this space, so that the lower end 22 of the upper column 20 and the diaphragm 14 are welded all around. Can be performed collectively, and the welding position using the automatic welding machine 40 can be simplified, and the connection position accuracy can be ensured.

  In the present embodiment, a rod-shaped member is used as the connecting member 30, and the connecting member 30 is arranged so as to be inclined away from the side surface of the upper pillar 20 as it approaches the lower end 31. For this reason, a large working space 34 can be secured around the side surface near the lower end 22 of the upper pillar 20, and the structure can be simplified.

In the present embodiment, the backing member 51 is fixed to the diaphragm 14 to serve as a positioning member for positioning the upper pillar 20.
For this reason, the upper pillar 20 can be positioned in the horizontal direction with respect to the diaphragm 14, and the positioning by the connecting member 30 can be assisted. That is, the positioning of the diaphragm 14 and the upper column 20 by the connecting member 30 is an indirect positioning function in which the working space 34 is separated from each connecting portion. Here, the positioning accuracy can be enhanced by adding a direct positioning function by the backing member 51 fixed to the diaphragm 14.

  Further, the backing member 51 used as a positioning member is provided on the surface of the diaphragm 14 inside the upper column 20 and engages with the lower end 22 of the upper column 20. It does not hinder the passage of the automatic welding machine 40 by being installed outside. Therefore, by positioning the diaphragm 14 and the upper column 20 with the connecting member 30 and the backing member 51 serving as a positioning member, the work can be performed while sufficiently securing the connection accuracy between the upper column 20 and the lower column 10. The automatic welding machine 40 can pass through the annular space including the interval 34.

In the present embodiment, an annular backing member 51 that can be fitted inside the lower end 22 of the upper pillar 20 is used as a positioning member for the upper pillar 20 and the lower pillar 10. Therefore, the backing member 51 used at the time of welding the upper pillar 20 and the lower pillar 10 can also be used as a positioning member for positioning the upper pillar 20, and the structure can be simplified.
Furthermore, since the contact member 52 that contacts the backing member 51 inserted from below is installed inside the upper pillar 20, the intended groove is formed between the lower end 22 of the upper pillar 20 and the diaphragm 14. Can be secured.

In the present embodiment, the lower pillar 10 has a beam-to-column joint 12 on the upper end side, a beam 16 extending laterally is connected to the beam-to-column joint 12, and the diaphragm 14 is connected to the beam-to-column joint 12. Are arranged at the same height as the upper surface of the beam 16.
For this reason, the diaphragm 14 of the ordinary column-beam joint 12 can be used as it is as the diaphragm of the present invention, and an increase in the number of parts and an increase in cost can be avoided.

[Second embodiment]
6 and 7 show a pillar connection structure 2 according to a second embodiment of the present invention.
The pillar connection structure 2 of the present embodiment has the same basic configuration as the pillar connection structure 1 of the first embodiment (see FIGS. 1 to 3). On the other hand, a positioning member (FIGS. 4 and 5) formed on the diaphragm 14 is different from the column connection structure 1 of the first embodiment. For this reason, the description of the common configuration will be omitted using the same reference numerals, and the duplicated description will be omitted, and different portions will be described below.

6 and 7, an annular backing member 53 is fitted to the lower end 22 of the upper column 20 and is fixed to the inner surface of the steel tube column 21 by welding.
A plurality of engaging members 54 as positioning members are arranged in the circumferential direction on the surface of the diaphragm 14, and are respectively fixed by welding to the diaphragm 14. The engagement member 54 may be a continuous member or an annular member that can be fitted inside the backing member 53.
By fitting the engaging member 54 fixed to the diaphragm 14 from the lower surface side of the backing member 53 of the upper column 20, the upper column 20 and the diaphragm 14 are positioned in the horizontal direction. In addition, a predetermined gap is formed between the lower end 22 of the upper pillar 20 and the surface of the diaphragm 14 by the lower end of the backing member 53 abutting on the surface of the diaphragm 14. This gap is closed by the backing member 53 from the back side, and is ready for welding by the torch 42 of the automatic welding machine 40 (see FIG. 7).

  According to the second embodiment, the same effects as those of the first embodiment can be obtained. Further, the backing member 53 fixed to the upper pillar 20 can be positioned by the engaging member 54 fixed to the diaphragm 14, and the positioning member applied to the diaphragm 14 can be simplified.

[Third embodiment]
FIG. 8 shows a pillar connection structure 3 according to a third embodiment of the present invention.
The pillar connection structure 3 of the present embodiment has the same basic configuration as the pillar connection structure 1 of the first embodiment (see FIGS. 1 to 3). For this reason, the description of the common configuration will be omitted using the same reference numerals, and the duplicated description will be omitted, and different portions will be described below.
In the first embodiment described above, the connection member 30 having the intermediate portion 33 made of steel pipe and the expansion / contraction mechanism 35 (see FIGS. 1 and 2) is used. On the other hand, in the present embodiment, as shown in FIG. 8, an intermediate portion of the connection member 30 is formed of the wire 36, and a turnbuckle 37 is provided in the middle of the wire 36 as an expansion mechanism.

In this embodiment, by manually operating the turnbuckle 37, the connecting member 30 can be expanded and contracted, that is, the length from the upper end 32 to the lower end 31 can be adjusted.
Since the connection member 30 of the present embodiment uses the wire 36, the connection member 30 is limited to transmitting a tensile force. However, when the connecting members 30 are provided on all sides of the upper pillar 20 (when the lower pillar 10 and the upper pillar 20 are used for the center pillar of a building), the pulling forces from opposite sides are applied to lower the pillars. The upper pillar 20 can be displaced in both directions with respect to the side pillar 10.
When there is no connecting member 30 on the opposite side of the upper pillar 20, such as when the lower pillar 10 and the upper pillar 20 are used as a side pillar or a square pillar of a building, it is used in the above-described first and second embodiments. It is preferable to use a connecting member 30 made of a wrought steel pipe and having an expansion mechanism 35.

[Fourth embodiment]
FIG. 9 shows a pillar connection structure 4 according to a fourth embodiment of the present invention.
The pillar connection structure 4 of the present embodiment has the same basic configuration as the pillar connection structure 1 of the first embodiment (see FIGS. 1 to 3). For this reason, the description of the common configuration will be omitted using the same reference numerals, and the duplicated description will be omitted, and different portions will be described below.
In the first embodiment described above, the upper pillar 20 is connected to the diaphragm 14 that forms the upper surface of the beam-to-column joint 12 of the lower pillar 10. On the other hand, in the present embodiment, the diaphragm connecting the upper columns 20 is different from the diaphragm 14 of the beam-column joint 12.

As shown in FIG. 9, in the present embodiment, a short column member 18 is fixed to the upper surface of the diaphragm 14 of the beam-column joint 12, and a diaphragm 19 is fixed to the upper surface.
The upper pillar 20 has a lower end connected to the surface of the diaphragm 19. In connection, the configuration of the above-described first embodiment (FIGS. 4 and 5) or the configuration of the second embodiment (FIGS. 6 and 7) can be appropriately used as a positioning member.
Further, the connecting member 30 is not limited to the steel pipe connecting member 30 having the expansion and contraction mechanism 35 as in the first embodiment (see FIGS. 1 and 2), but the wire 36 and the turnbuckle as in the third embodiment. The connecting member 30 using 37 (see FIG. 8) may be used.
According to the fourth embodiment, the same effects as those of the first embodiment can be obtained. Further, the welding position between the lower end 22 of the upper column 20 and the surface of the diaphragm 19 can be made higher than the beam member 16, and the automatic welding machine 40 can be arranged right beside the welding position.

(Modification)
Note that the present invention is not limited to the above-described embodiment, and modifications and the like within a range that can achieve the object of the present invention are included in the present invention.
The connecting member 30 is not limited to the connecting member 30 made of a steel pipe having the above-described telescopic mechanism 35 (see FIGS. 1 and 2) and the connecting member 30 using the wire 36 and the turnbuckle 37 (see FIG. 8). L-shaped steel, H-shaped or T-shaped steel may be used. Even when using these steel materials, it is preferable to provide the extension mechanism 35 in the middle.
The extension mechanism 35 is not limited to the so-called “Kirin” structure as in the first embodiment. For example, if a nut is fixed to one steel pipe, the head of a bolt is fixed to the other steel pipe, and these bolts and nuts are screwed together to form a pair of steel pipes, the connection member 30 is formed by a series of steel pipes. An intermediate portion 33 is formed, and a telescopic mechanism 35 is formed by bolts and nuts on the way. In such a connecting member 30, by rotating the other steel pipe with respect to the one steel pipe, the connecting member 30 can be expanded and contracted, and the length can be adjusted.
The connection member 30 is not limited to a configuration in which the upper end 32 is connected to the bracket 27 of the upper pillar 20 with a bolt and a nut, and the lower end 31 is connected to the bracket 17 of the lower pillar 10 with a bolt and a nut. May be used. Further, the steel pipe or the steel material of the connecting member 30 is not limited to a straight rod shape, and may be an L-shaped or arc-shaped member with a middle bent.

The steel pipe column 11 of the lower column 10, the intermediate column 13, and the steel column 21 of the upper column 20 are not limited to hollow and square cross-sections, but may have other cross-sections such as circular cross-sections.
In the above embodiment, the lower column 10 having the column-beam joint 12 on the upper surface is used, and the upper column 20 is connected to the upper diaphragm 14, but the lower column 10 has no column-beam joint 12. May be used. In this case, a diaphragm for connecting the upper column 20 may be fixed to the upper end of the steel tube column 11 constituting the lower column 10.
In addition, the detailed configuration, shape, dimensions, and the like of the pillar connection structures 1, 2, and 3 can be appropriately changed in implementation.

  INDUSTRIAL APPLICATION This invention can be utilized as a pillar connection structure and a pillar connection method.

  1, 2, 3, 4 ... pillar connection structure, 10 ... lower pillar, 11 ... steel pipe pillar, 12 ... pillar-beam joint, 13 ... intermediate pillar, 14, 15, 19 ... diaphragm, 16 ... beam material, 161, 162: flange, 163: web, 17, 27: bracket, 18: column member, 20: upper column, 21: steel pipe column, 22: lower end, 30: connecting member, 31: lower end, 32: upper end, 33 ... Intermediate part, 34: working interval, 35: telescopic mechanism, 36: wire, intermediate part, 37: turnbuckle, telescopic mechanism, 40: automatic welding machine, 41: rail, 42: torch, 51: positioning member Backing member, 52: abutting member, 53: backing member, 54: an engaging member that is a positioning member.

The pillar connection structure of the present invention includes a lower pillar having a diaphragm at an upper end, an upper pillar having a lower end welded to the diaphragm, an upper end fixed to a side surface of the upper pillar, and a lower end having the diaphragm or the diaphragm. A connection member fixed to a building member fixed to the connection member, wherein a working interval through which an automatic welding machine can pass is formed between an intermediate portion between the upper end portion and the lower end portion and a side surface of the upper column. Yes, and the diaphragm, the positioning member for positioning the upper pillar is fixed, the positioning member is characterized backing member der Rukoto the fittable ring inside the lower end of the upper pillar .

In the present invention, the other end of the connecting member and the diaphragm may be directly fixed, or indirectly fixed via another building member such as a beam connected to the side surface of the lower pillar. You may.
In the present invention, since the lower end of the upper column is welded and fixed to the surface of the diaphragm of the lower column, the horizontal positional accuracy required at the time of welding can be eased as compared with the case where the column ends are flat-welded. . Therefore, as a positioning means for the upper column and the lower column at the time of welding, instead of an erection piece directly connected to the side surface of each column, a connecting member separated from the side surface of the upper column by a working interval can be used. As a result, an annular space including the working interval is formed around the upper pillar, and the automatic welding machine makes a round through this space, so that the entire periphery welding between the lower end of the upper pillar and the diaphragm can be performed collectively. Thus, the welding process using the automatic welding machine can be simplified, and the connection position accuracy can be ensured.
According to the present invention, the positioning member fixed to the diaphragm allows the upper column to be positioned in the horizontal direction with respect to the diaphragm, thereby assisting the positioning by the connecting member. That is, the positioning of the diaphragm and the upper pillar by the connection member is an indirect positioning function that is separated from the respective connection portions by a working interval. Here, by adding a direct positioning function by a positioning member fixed to the diaphragm, positioning accuracy can be improved.
At this time, the positioning member may be installed on the surface of the diaphragm inside the upper pillar and engage with the lower end of the upper pillar, for example, and may be installed on the outer side of the upper pillar like an erection piece to pass through the automatic welding machine. There is no hindrance. Therefore, by positioning the diaphragm and the upper column with the connecting member and the positioning member, the automatic welding machine is installed in the annular space including the working interval while sufficiently securing the connection accuracy between the upper column and the lower column. It becomes possible to pass.
In the present invention, the backing member used for welding the upper column and the lower column can be used also as a positioning member for positioning the upper column, and the structure can be simplified.

In the pillar connection structure of the present invention, it is preferable that a contact member that contacts the backing member inserted from below is installed inside the upper pillar.
According to the present invention, an intended groove can be secured between the lower end of the upper pillar and the diaphragm.

The pillar connection method of the present invention is a pillar connection method in which an upper end surface of a lower pillar and a lower end surface of an upper pillar are welded and connected, and a diaphragm is formed at an upper end of the lower pillar, and the diaphragm is used as a positioning member. An annular backing member that can be fitted inside the lower end of the upper pillar is fixed,
In a state where the upper column is positioned by the positioning member, a connection member having an upper end fixed to a side surface of the upper column and a lower end fixed to the diaphragm or a building member fixed to the diaphragm is installed. A predetermined working interval is formed between the connection member and the side surface of the upper pillar, an automatic welding machine is installed at the working interval, and the automatic welding machine makes a round along the side surface of the upper pillar, The lower end of the upper pillar is welded to the diaphragm over the entire circumference.
In the present invention as described above, it is possible to obtain the same functions and effects as described in the column connection structure of the present invention.

  In the pillar connection method of the present invention, it is preferable that a contact member that contacts the backing member inserted from below is installed inside the upper pillar.
  According to the present invention, an intended groove can be secured between the lower end of the upper pillar and the diaphragm.

1 is a side view showing a first embodiment of a pillar connection structure of the present invention. The side view which shows the state which decomposed | disassembled the pillar connection structure of the said 1st Embodiment. FIG. 3 is a plan view showing the column connection structure of the first embodiment. FIG. 3 is a cross-sectional view showing a positioning member before connection according to the first embodiment. FIG. 4 is a cross-sectional view showing the positioning member after connection according to the first embodiment. Sectional drawing which shows the positioning member before connection of 2nd Embodiment which is not included in this invention. Sectional drawing which shows the positioning member after the connection of the said 2nd Embodiment. The side view which shows 3rd Embodiment of the pillar connection structure of this invention. The side view showing a 4th embodiment of the pillar connection structure of the present invention.

[Second embodiment]
6 and 7 show a pillar connection structure 2 according to a second embodiment that is not included in the present invention.
The pillar connection structure 2 of the present embodiment has the same basic configuration as the pillar connection structure 1 of the first embodiment (see FIGS. 1 to 3). On the other hand, a positioning member (FIGS. 4 and 5) formed on the diaphragm 14 is different from the column connection structure 1 of the first embodiment. For this reason, the description of the common configuration will be omitted using the same reference numerals, and the duplicated description will be omitted, and different portions will be described below.

Claims (11)

A lower pillar having a diaphragm at the upper end,
An upper pillar whose lower end is welded to the diaphragm,
The upper end is fixed to the side surface of the upper column, the lower end is fixed to the diaphragm or a building member fixed to the diaphragm, and the middle portion between the upper end and the lower end and the side surface of the upper column. A connection member between which a working interval is formed through which an automatic welding machine can pass. The pillar connection structure according to claim 1,
The column connection structure, wherein the connection member has a rod shape, and is arranged so as to be inclined away from a side surface of the upper column as it is closer to the lower end. In the pillar connection structure according to claim 1 or 2,
The column connection structure, wherein the connection member has a telescopic mechanism for adjusting a length from the upper end to the lower end. The pillar connection structure according to any one of claims 1 to 3,
A pillar connection structure, wherein a positioning member for positioning the upper pillar is fixed to the diaphragm. The pillar connection structure according to claim 4,
The pillar connection structure, wherein the positioning member is an annular backing member that can be fitted inside the lower end of the upper pillar. The pillar connection structure according to claim 4,
The positioning member is a plurality of engaging members arranged in the circumferential direction,
The pillar connection structure, wherein each of the engagement members is engageable with a backing member fixed inside a lower end of the upper pillar. In the pillar connection structure according to any one of claims 1 to 6,
The lower pillar has a beam-column joint on the upper end side, and a beam extending laterally is connected to the beam-joint.
The column connection structure, wherein the diaphragm is arranged on the upper surface side of the beam-column joint at the same height as the upper surface of the beam. A pillar connection method for welding and connecting an upper end surface of a lower pillar and a lower end surface of an upper pillar,
A diaphragm is formed at the upper end of the lower pillar, and a connecting member whose upper end is fixed to the side surface of the upper pillar and whose lower end is fixed to the diaphragm or a building member fixed to the diaphragm is installed. A predetermined working interval is formed between the member and the side surface of the upper column,
An automatic welding machine is installed at the work interval, the automatic welding machine makes a round along the side surface of the upper column, and the lower end of the upper column is welded to the diaphragm over the entire circumference. In the pillar connection method according to claim 8,
A pillar connection method, wherein a positioning member is fixed to the diaphragm, and the upper column is positioned by the positioning member when installing the connection member. The pillar connection method according to claim 9,
The column connection method, wherein the positioning member is an annular backing member that can be fitted inside a lower end of the upper column. The pillar connection method according to claim 9,
The positioning member is a plurality of engaging members arranged in the circumferential direction,
The method according to claim 1, wherein the engaging member is engageable with a backing member fixed inside a lower end of the upper column.

Images