JP4878161B2 - Steel tube column joining method and joining jig - Google Patents

Description

  The present invention relates to a method for joining steel pipe columns and a steel pipe column joining jig used for joining the steel pipe columns, wherein an upper column made of steel pipe can be easily joined to a lower column made of steel pipe by bolt joining. Applicable for joining steel pipe columns and concrete filled steel pipe columns.

  In general, welding is used as a method of joining the lower end of the upper column made of steel pipe to the upper end of the lower column made of steel pipe. At this time, until the welding of the joint portion is completed, for example, as shown in FIG. The erection pieces 22 and 22 project from the ends of the lower column 20 and the upper column 21 respectively, and the erection pieces 22 and 22 are connected by a plurality of connecting plates 23 and temporary fixing bolts 24 to thereby connect the lower column 20 and the upper column. The column 21 is temporarily joined.

  By the way, in joining by welding, the quality of welding is greatly influenced by the weather and the skill of the operator, and there is a problem of lack of reliability. Therefore, joining by high-strength bolts is desirable.

  Until now, the lower column 20 and the upper column 21 temporarily joined as described above are joined to each other by the high-strength bolts, corresponding to the bolt holes formed at the ends of the columns of the lower column 20 and the upper column 21. The joining plate temporarily attached with the joining nut is attached to the inside of the joint portion between the lower column 20 and the upper column 21, and the joining plate formed with a bolt hole is attached to the outside of the joint portion. The joint bolt is tightened from the bolt hole to the inner joint nut.

  Further, a high-strength bolt may be fastened to a joining nut attached to the inside of the lower column 20 and the upper column 21 directly from the outside of the lower column 20 and the upper column 21 without attaching a joining plate to the outside of the joint portion. It has been broken.

  Even in this joining method, it is necessary to temporarily join the lower column and the upper column until all of the joining bolts have been tightened. However, in the joining method using the conventional erection piece, the erection piece is the joint part. It cannot be used because it obstructs the joining plate attached to the outside of the plate.

  In addition, as a most appropriate method, a method of using a joining plate and tightening a temporary fixing bolt from a bolt hole of the outer joining plate to an inner joining nut can be considered.

JP-A-9-137511

  However, the bolt holes and joint nuts may be damaged by the temporary fixing bolts. In addition, the bolt holes generally have some play against the temporary fixing bolts. Since there is relatively little play between the bolt holes, the bolt holes are displaced and it is sometimes difficult to fasten the permanent bolts. In addition, even though a single joining plate has a considerable weight, handling is troublesome because a plurality of joining plates are used.

  The present invention has been made to solve the above-described problems, and a steel pipe column joining method and a joining method that allow a top column to be securely and efficiently joined to a lower column made of a steel pipe by bolt joining. It aims at providing the jig for steel pipe column joining used.

The method for joining steel pipe columns according to claim 1 uses a joining jig 8 and a drift pin 9 to join a lower end portion of an upper column 2 made of steel pipe to an upper end portion of a lower column 1 made of steel pipe , and a plurality of joining plates 3 and joining. In a method for joining steel pipe columns joined by a plate 4 and a plurality of joining bolts 5 , a joining plate 4 having a plurality of bolt holes 4a, a plurality of joining nuts 6 communicating with the bolt holes 4a, and a plurality of bolt holes 3a are provided. A step of temporarily assembling the joining plate 3 with a joining jig 8 formed in a ring shape having the same cross-sectional shape and the same dimensions as the lower pillar 1 and the upper pillar 2, and the joining plate 3 and the joining plate 4 are joined to the lower pillar 1 The lower end side of the joining plate 4 and the joining plate 3 to the inner side and the outer side of the lower column 1, respectively, Temporarily fixing the joining plate 3 and the joining plate 4 to the upper end portion of the lower pillar 1 by inserting the drift pins 9 into the bolt holes 3 a of the joint 3, the bolt holes 1 a of the lower pillar 1, and the bolt holes 4 a of the joining plate 4. And a step of installing a lower end portion of the upper column 2 at an upper end portion of the lower column 1 and attaching an upper end side of the bonding plate 4 and the bonding plate 3 to the inner side and the outer side of the upper column 2, respectively. The joining bolt 5 is inserted from the bolt hole 3a of the joining plate 3 into the bolt hole 1a of the lower pillar 1, the bolt hole 2a of the upper pillar 2, and the bolt hole 4a of the joining plate 4, and screwed into the joining nut 6. It is characterized by comprising the steps of:

  In particular, the present invention makes it possible to firmly join the lower pillar and the upper pillar by attaching joining plates to both the inside and the outside of the joint portion between the lower pillar and the upper pillar.

  In addition, since the joining plate for main installation is used as a joining member for temporarily joining the lower column and the upper column, it is very economical, and since a drift pin is used instead of the temporary fixing bolt, a bolt hole is used. The joint nut is not damaged, and the bolt hole is not displaced because there is almost no margin between the bolt hole and the drift pin, so that the joint bolt for permanent installation can be securely tightened.

The method for joining steel pipe columns according to claim 2 uses a joining jig 8 and a drift pin 9 to connect a lower end portion of an upper column 2 made of steel pipe to an upper end portion of a lower column 1 made of steel pipe , and a plurality of joining plates 4 and a plurality. In the method of joining steel pipe columns to be joined by the joining bolts 5 , the joining plate 4 having a plurality of bolt holes 4 a and a plurality of joining nuts 6 communicating with the bolt holes 4 a has the same cross-sectional shape as the lower pillar 1 and the upper pillar 2. And a step of temporarily assembling with the joining jig 8 formed in a ring shape of the same size, the joining plate 4 is transferred to the upper end of the lower pillar 1, and the lower end side of the joining plate 4 is placed on the lower pillar 1. And attaching the drift plate 9 to the bolt hole 1a of the lower pillar 1 and the bolt hole 4a of the joining plate 4 to attach the joining plate 4 to the lower pillar 1 A step of temporarily fixing to an end portion, a step of installing a lower end portion of the upper column 2 at an upper end portion of the lower column 1, a step of attaching the upper end side of the joining plate 4 to the inside of the upper column 2, It is characterized by comprising the steps of inserting the joining bolt 5 from the bolt hole 1a of the lower pillar 1 and the bolt hole 2a of the upper pillar 2 into the bolt hole 4a of the joining plate 4 and screwing into the joining nut 6. .

  In particular, the present invention can easily and economically join the lower column and the upper column by attaching the junction plate only to the inside of the joint portion between the lower column and the upper column and omitting the outer junction plate. It is a thing.

  In any of the joining methods of claim 1 and claim 2, when the lower end portion of the upper column is disposed at the upper end portion of the lower column, both end portions may abut each other (metal touch), or You may provide a fixed clearance between both ends, without abutting both ends.

The method for joining steel pipe columns according to claim 3 is the method for joining steel pipe columns according to claim 1 or 2, wherein the joining nut 6 is attached to the joining plate 4 by a nut holder 7 .

  The nut holder used here is a nut holding case formed so that a plurality of joining nuts can be held at predetermined intervals so as not to be rotated when fastening the joining bolts screwed to the joining nuts. Thus, it can be easily fixed to the joining plate by welding or the like.

The steel pipe column joining jig according to claim 4, wherein when the upper column 2 made of steel pipe is joined to the lower column 1 made of steel pipe by the plurality of joining plates 3 and 4 and the plurality of joining bolts 5 , the joining plate 3 and 4 is a steel pipe column joining jig used for temporarily assembling 4 and is formed in a ring shape having the same cross-sectional shape and the same dimensions as the lower column 1 and the upper column 2, and the joining plate 3 and A bolt hole 8a for bolting 4 is formed.

  According to the present invention, a plurality of joining plates having a considerable weight can be temporarily assembled in accordance with the shape and dimensions of the lower column and the upper column, and simultaneously set on the upper end of the lower column. Up. Moreover, the said metal fitting for joining can be easily formed from the same steel pipe as a lower pillar and an upper pillar.

  The present invention uses the joining plate and the drift pin for the final joining as temporary joining members, so that the lower end of the upper column is extremely efficiently and firmly secured to the upper end of the lower column by a plurality of joining plates and joining bolts. It has the effect that it can be joined.

  By using the joining jig of the present invention, it is possible to simultaneously set a plurality of joining plates having a considerable weight on the upper end portion of the lower column, so that the working efficiency is greatly improved.

  1 (a) and 1 (b) show a joint between a lower column and an upper column made of steel pipes. In the figure, the lower column 1 is abutted against the upper end of the lower column 1, and the lower column 1 and the upper column 2 are joined by a plurality of joining plates 3 and a joining plate 4 and a plurality of joining bolts 5.

  The joining plate 3 is attached to the outside of each surface of the lower pillar 1 and the upper pillar 2 so as to straddle between both pillars 1 and 2, and the joining plate 4 is both inside the respective faces of the lower pillar 1 and the upper pillar 2. Attached across the pillars 1 and 2 respectively.

  Of the joining bolts 5, the joining bolts 5 fastened to the lower pillar 1 side are bolt holes 3 a, bolt holes 1 a and bolts formed in the joining plate 3, each side part of the lower pillar 1, and the joining plate 4, respectively. Each of the holes 4a passes through the hole 4a and is screwed into a joint nut 6 attached to the back side of the joint plate 4.

  Moreover, the joining bolt 5 fastened to the upper pillar 2 side passes through the bolt hole 3a, the bolt hole 2a, and the bolt hole 4a formed in the joining plate 3, each side part of the upper pillar 2 and the joining plate 4, respectively. , And screwed to a joining nut 6 attached to the back side of the joining plate 4.

  The joining nut 6 is attached to the back side of the joining plate 4 by a nut holder 7. The nut holder 7 is a nut holding case for holding a plurality of joining nuts 6 one by one in accordance with the position of the bolt 4 a of the joining plate 4 so as not to be rotated when the joining bolt 5 is tightened, and is welded to the joining plate 4. Has been. Note that a high-strength bolt is used as the joining bolt 5.

  When the lower column 1 and the upper column 2 are joined, for example, as shown in FIG. 2, in order to set the joining plate 3 and the joining plate 4 on the upper end of the lower column 1, joining as shown in FIG. A jig 8 is used.

  Further, in order to temporarily fix the joining plate 3 and the joining plate 4 to the upper end portion of the lower column 1, for example, a drift pin 9 as shown in FIGS. 6 and 7 is used.

  The joining jig 8 is formed in a rectangular ring shape having the same cross-sectional shape and the same dimensions as the lower pillar 1 and the upper pillar 2, and a bolt hole 8a is formed at the center of each side portion. The bolt hole 8a is formed at a position corresponding to the bolt hole 3a and the bolt hole 4a formed at the upper end portion among the plurality of bolt holes 3a and the bolt holes 4a formed in the joining plate 3 and the joining plate 4, respectively. . Further, a hanging string 8b is attached to the joining jig 8 so as to be hung by a crane or the like.

  Then, by using this joining jig 8, the joining plate 3 and the joining plate 4 are respectively connected to the outer side and the inside of each side portion of the joining jig 8, and the bolt holes 3 a and 4 a of each plate and the bolt of the joining jig 8. The plurality of joining plates 3 and joining plates 4 can be simultaneously transferred to the upper end of the lower column 1 by being bolted by temporary bolts 10 penetrating the holes 8a and suspended by a crane or the like.

  FIGS. 7A, 7B and 7C show an example of a drift pin. The drift pin 9 includes a central large-diameter portion 9a and small-diameter portions 9b and 9b formed at both ends of the large-diameter portion 9a. It is formed in a rod shape.

  When the small diameter portions 9b, 9b at both ends are successively inserted into the bolt holes 3a of the joining plate 3, the bolt holes 1a of the lower column 1, and the bolt holes 4a of the joining plate 4, the bolt holes 3a, the bolt holes 1a and The bolt holes 4a are formed to have outer diameters that substantially match the inner diameters of the bolt holes 3a, the bolt holes 1a, and the bolt holes 4a so that the bolt holes 4a completely coincide with each other on the same axis. The small-diameter portion 9 b is formed in such a length that it reaches the inside of the bolt hole 4 a of the joining plate 4 but does not reach the joining nut 6.

  Further, in particular, the drift pin 9 shown in FIG. 7 (c) is a length that is screwed into a drift pin main body having small diameter portions 9b and 9b at both ends and a male screw portion 9c at the center, and a male screw portion 9c at the center. A large-diameter portion 9a made of a nut is formed. Then, by turning the large-diameter portion 9a made of a long nut and appropriately moving in the axial direction of the drift pin main body, the small-diameter portions at both ends according to the total depth of the bolt hole 3a, the bolt hole 1a and the bolt hole 4a The length of 9b can be changed freely.

  Next, a method for joining steel pipe columns according to the present invention will be described based on the example shown in FIGS.

  First, the joining plate 3 and the joining plate 4 are set on each side of the upper end of the lower column 1. In this case, each joining plate 3 and joining plate 4 are temporarily assembled on the ground by means of a joining jig 8 and then suspended by a crane and transferred to the upper end of the lower column 1.

  The joining plate 3 is set with the lower half of the joining plate 3 attached to the outer side of the lower pillar 1 and the upper half protruding above the lower pillar 1. The joining plate 4 is set with the lower half of the joining plate 4 attached to the inner side of the lower pillar 1 and the upper half protruding above the lower pillar 1.

  Then, by continuously inserting the small diameter portion 9b of the drift pin 9 into the bolt hole 3a of each joining plate 3, the bolt hole 1a of the lower pillar 1 and the bolt hole 4a of the joining plate 4 as shown in FIG. Each joining plate 3 and joining plate 4 are temporarily fixed to each side part of the upper end part of the lower pillar 1.

  The drift pin 9 is inserted into at least two bolt holes for each joining plate. By inserting the small-diameter portion 9b of the drift pin 9 into the bolt hole, the bolt holes 3a, 1a and 4a can be matched. Further, by inserting the joining bolt 5 into at least one bolt hole thus aligned and screwing the tip of the joining bolt 5 into the joining nut 6, it is possible to prevent the joining plate 3 and the joining plate 4 from being accidentally dropped. can do.

  Next, the joining bolt 5 is inserted into the bolt hole 3 a into which the drift pin 9 is not inserted, the bolt hole 1 a of the lower pillar 1, and the bolt hole 4 a of the joining plate 4, and the tip of the joining bolt 5 is screwed into the joining nut 6. Match. At this stage, each joining bolt 5 is not tightened to the end, but is loosely tightened so that the load of the upper column 2 does not act on the joining bolt 5.

  Next, the joining jig 8 is removed, and the lower end of the upper column 2 is butted against the upper end of the lower column 1. And the upper half of each joining plate 3 is attached to each outer side part of the lower end part of the upper column 2, and the upper half of each joining plate 4 is attached to each inner part.

  Next, the small-diameter portion 9b of the drift pin 9 is inserted into the bolt hole 3a of each joint plate 3, the bolt hole 2a of the upper column 2, and the bolt hole 4a of each joint plate 4, and the position of each bolt hole is determined. Match. Then, the joining bolts 5 are continuously inserted into the corresponding bolt holes, and the tips of the joining bolts 5 are screwed into the joining nuts 6. Further, the drift pin 9 is extracted from the bolt hole in which the drift pin 9 is inserted, the joining bolt 5 is inserted, and the tip thereof is screwed into the joining nut 6.

  Then, the joining bolts 5 on the lower pillar 1 side and the upper pillar 2 side are firmly tightened to the end, and the joining of the lower pillar 1 and the upper pillar 2 is completed as shown in FIGS. 1 (a) and 1 (b). .

  FIG. 8 and FIG. 9 show the joint part of the pillar in which the lower pillar 1 and the upper pillar 2 are joined only by the inner joining plate 4 and the plurality of joining bolts 5 without the outer joining plate 3. FIGS. 10A to 10D show the joining procedure, and the only difference from the joining method described in FIGS. 2 and 3 is that no joining plate is used.

  According to the present invention, a lower column and an upper column made of a steel pipe can be joined very efficiently and firmly by a joining bolt instead of welding.

The junction part of the lower pillar and upper pillar which consist of steel pipes is shown, (a) is the perspective view, (b) is a cross-sectional view. It is a perspective view which shows the state which set the some joining plate using the jig for joining to the upper end part of a lower pillar. It is a perspective view which shows the state which temporarily fixes a some joining plate to the upper end part of a lower pillar, and joins the lower end part of an upper pillar. It is a perspective view which shows the state which temporarily fixes a some joining plate to the upper end part of a lower pillar, and joins the lower end part of an upper pillar. It is a perspective view of the jig for joining used when setting a joining plate to the upper end part of a lower pillar. It is sectional drawing which shows the use condition of a drift pin. (A), (b) is sectional drawing which shows the use condition of a drift pin, (c) is a front view which shows the other example of a drift pin. It is a perspective view which shows the junction part of the lower pillar and upper pillar which consist of steel pipes. It is a perspective view which shows the state which set the some joining plate using the jig for joining to the upper end part of a lower pillar. (A)-(d) is a perspective view which shows the procedure which joins the lower end part of an upper pillar to the upper end part of a lower pillar. It is a perspective view which shows the state which temporarily joined the lower pillar and upper pillar which consist of steel pipes.

Explanation of symbols

1 Lower pillar 2 Upper pillar 3 Joining plate (joint plate with bolt holes)
4 Joining plate (joint plate with bolt holes and joining nuts)
5 Joining bolt 6 Joining nut 7 Nut holder 8 Joining jig 9 Drift pin 9a Large diameter portion 9b Small diameter portion 10 Temporary bolt

Claims (4)

The lower end of the upper column 2 made of steel pipe to the upper end of the lower column 1 using a bonding jig 8 and the drift pin 9 made of steel, joined by a plurality of bonding plate 3 and the junction plates 4 and a plurality of fastening bolt 5 steel In the column joining method , a plurality of bolt holes 4a, a joining plate 4 having a plurality of joining nuts 6 communicating with the bolt holes 4a, and a joining plate 3 having a plurality of bolt holes 3a are connected to the lower pillar 1 and the upper pillar 2 respectively. And a step of temporarily assembling with the joining jig 8 formed in a ring shape having the same cross-sectional shape and the same dimensions, the joining plate 3 and the joining plate 4 are transferred to the upper end portion of the lower column 1 and the joining plate 4 And attaching the lower end side of the joining plate 3 to the inside and outside of the lower pillar 1 respectively, and the bolt hole 3a of the joining plate 3 and the bottom pillar 1 A step of temporarily fixing the joining plate 3 and the joining plate 4 to the upper end of the lower pillar 1 by inserting the drift pin 9 into the bolt hole 4a of the joint hole 1a and the joining plate 4, and the upper end of the lower pillar 1 A lower end portion of the upper column 2, a step of attaching the upper end side of the bonding plate 4 and the bonding plate 3 to the inner side and the outer side of the upper column 2, and the bolt hole 3 a of the bonding plate 3, A steel pipe column comprising a step of inserting a joining bolt 5 into a bolt hole 1a of the lower pillar 1, a bolt hole 2a of the upper pillar 2, and a bolt hole 4a of the joining plate 4 and screwing into the joining nut 6 . Joining method. A steel pipe column joining method in which the lower end portion of the upper column 2 made of steel pipe is joined to the upper end portion of the lower column 1 made of steel pipe by using a joining jig 8 and a drift pin 9 by a plurality of joining plates 4 and a plurality of joining bolts 5 . The joint plate 4 having a plurality of bolt holes 4a and a plurality of joint nuts 6 communicating with the bolt holes 4a is formed into a ring shape having the same cross-sectional shape and the same dimensions as the lower pillar 1 and the upper pillar 2. A step of temporarily assembling with the jig 8, a step of transferring the joining plate 4 to the upper end of the lower column 1, attaching a lower end side of the joining plate 4 to the inside of the lower column 1, and the lower column 1 A step of temporarily fixing the joining plate 4 to the upper end of the lower column 1 by inserting a drift pin 9 into the bolt hole 1a of the joining plate 4 and the bolt hole 4a of the joining plate 4; The lower end of the upper column 2 is installed at the upper end of the first column 2, the upper end side of the joining plate 4 is attached to the inner side of the upper column 2, the bolt holes 1 a of the lower column 1, and the upper column 2 A steel pipe column joining method comprising the steps of inserting a joining bolt 5 from a bolt hole 2a into a bolt hole 4a of a joining plate 4 and screwing it into the joining nut 6 . Joint nut 6 the bonding method according to claim 1 or 2, wherein the tubular columns, characterized in that attached to the joining plate 4 by a nut holder 7. A steel pipe column used for temporarily assembling the joining plates 3 and 4 when the upper pillar 2 made of steel pipe is joined to the lower pillar 1 made of steel pipe by a plurality of joining plates 3 and 4 and a plurality of joining bolts 5 . A joining jig, which is formed in a ring shape having the same cross-sectional shape and the same dimensions as the lower pillar 1 and the upper pillar 2, and a bolt hole 8a for bolting the joining plates 3 and 4 is formed in the side part. A steel pipe column joining jig characterized by comprising:

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