JP2000213070A - Joining method for pipe body with join hardware by bolt and pipe body bolt conveyance device and pipe body bolt pulling out jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joining method for a pipe body such as a square steel pipe and a circular steel pipe capable of being tightened easily from outside with join hardware by a bolt using an inexpensive through bolt instead of an expansive on side bolt, a bolt conveyance device, and a bolt pulling out jig. SOLUTION: When a pipe body and join hardware are mutually joined by a bolt, a bolt conveyance device 15 provided with a bolt holder 14 nipping a plurality of bolts in a condition in which they stand straight is inserted into the pipe body and is stopped at a predetermined position, and a bolt pulling out jig 18 inserted with a washer 17 and a nut 12 is inserted into bolt holes of overlapped pipe elements and a bolt hole of the join hardware 5 from the outside. A tip part of the bolt nipped by the bolt holder is gripped and pulled out by a bolt grip cylinder 19 of this pulling out jig, the tip part of the bolt protrudes to the outside of the join hardware, and the washer and the nut are moved from the pulling out jig to the tip part of the bolt to screw-fit the nut and tighten them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a steel structure building, for example, using a tubular body such as a square steel pipe or a circular steel pipe having a closed cross section as a column member, and connecting the column member to a beam through a metal joint. The present invention relates to a bolt joining method applied for passing a joint metal to a pipe and joining with a bolt when attaching the pipe, a bolt conveying device in a pipe used in the joining method, and a bolt extracting jig in a pipe. The present invention is applied to a bolt joint in which a bolt is inserted into a bolt hole that is not accessible from the end of the tube.

[0002]

2. Description of the Related Art In recent years, in order to improve seismic resistance, a bidirectional rigid frame structure using a tubular member such as a square steel tube or a circular steel tube having a closed cross section as a column member and an H-shaped steel member as a beam member has been frequently used. For example, in order to join a rectangular steel pipe column having a closed cross section and a beam material to obtain a bidirectional rigid frame structure, a through-diaphragm type as shown in FIG. 15 is generally used. The connection between the diaphragm 2 and the diaphragm 2 and the mounting portion 4 of the H-shaped steel beam 3 as a beam material are performed by welding. In this construction method, there are many welding points, high welding technology and strict quality are indispensable, there is a problem that a long time is required for the construction, and the construction cost is high.

[0003] As a joining method for solving such a problem, a rectangular steel pipe column 1 and an H-shaped steel beam 3 are joined to a joining metal (split tee) 5 and an outer side, as shown in FIG. One-side bolt 6 that can be inserted and fastened from the front and can be easily tightened at the factory or construction site
There has been proposed a method of joining using the method. However, in this joining method, (1) since a large amount of expensive one-side bolts are used,
The joining cost increases. (2) If the bolt fastening fails, there are problems such as cutting and removing the bolt and the need for rework.

[0004] As a joining method for solving such a problem, there is a method of joining the rectangular steel tube column 1 and the H-shaped steel beam 3 to a joining metal (split tee) 5 using an inexpensive through bolt. In this joining method, the thickness of the square tubular column is large,
It is effective when sufficient strength can be secured by screwing a tap bolt that does not use a nut from the outside, but if sufficient strength cannot be secured, insert a through bolt from the inside of the square steel pipe column and By screwing the nut to the through bolt and tightening it on the outside, or by inserting the through bolt from the outside and screwing the nut on the inside and tightening it on the outside, the joining bracket (split tee) 5 It is conceivable to adopt a method of firmly fixing.

As such a joining method, there is, for example, an invention described in Japanese Patent No. 2693139. According to the present invention, as shown in FIG.
Are connected, and a plurality of holding bodies 41 having support holes 40 for holding the plurality of bolt bodies in an inverted state are provided.
3 is inserted into the hollow column 44 in a state where the bolt body 43 is inverted while supporting the head of the third column, and then an outer fitting 45 attached along the outer surface of the hollow column 44 and a bolt hole 46 where the hollow column 44 overlaps , 47 into the hollow column 44, as shown in FIGS. 17 (b) and (c).
The bolt body 43 is lifted up with a bolt, and the shaft portion 43s of the bolt body is temporarily fixed with a plate-shaped stopper 49 in a state of protruding from the bolt hole 47 to the outside. Into the outer fitting 45 and the hollow pillar 4
4 are joined to each other.

However, in the present invention, the bolt insertion jig 4
2 is inserted into the hollow pillar 44, and the bolt body 43 supported by the long and heavy insertion jig and the bolt holes 46 and 47 of the hollow pillar 44 are provided.
Does not have an effective structure for the positioning of the bolt insertion jig 42 because the positioning is troublesome and the frictional resistance between the insertion jig 42 and the inner surface of the hollow column 44 is large. Is large and poor in operability.

Further, in order to temporarily fix the bolt body 43 in a state of protruding outside from the bolt hole 47, the bolt body 43 is provided.
It is necessary to fit a plate-shaped stopper 49 having a notch into the shaft portion 43s, and it is troublesome. Since the hanging tool is removed from the bolt body in a temporarily fixed state and the nut is screwed, the time required from the temporary fixing to the screwing is required. There is a problem that time is long.
Furthermore, when the lifting of the bolt body is unsuccessful and the bolt body is dropped, there is a problem that the bolt body falls down or shifts in position, cannot be lifted again, and it takes time to start over.

[0008]

The present invention basically solves the problem of the invention described in Japanese Patent No. 2693139 in order to minimize the amount of expensive one-side bolts used. A method of joining a steel pipe (hereinafter referred to as a "pipe body") such as a square steel pipe, a circular steel pipe, or a column material thereof, which can be easily tightened from the outside using an inexpensive through bolt, and a bolt, and a bolt. An object of the present invention is to provide a transfer device and a bolt drawing jig.

[0009]

Means for Solving the Problems The present invention provides the following (1) to
It comprises the invention of (9). (1) When bolting a metal joint to a pipe, a bolt transfer device provided with a bolt holder holding a plurality of bolts in an upright state is inserted into the pipe, stopped at a predetermined position, and overlapped. A bolt pull-out jig through which a washer and a nut are inserted is inserted from the outside into the bolt hole of the tubular body and the bolt hole of the joint hardware, and the bolt holding cylinder at the tip of the pull-out jig is clamped by the bolt holder. The bolt is pulled out of the joint by pulling out the bolt extraction jig while holding the tip of the bolt with the bolt gripping tube, and then the washer and nut are pulled out from the extraction jig. A method for joining bolts to a tube and a joint metal, wherein the method is shifted to the above, and the nut is screwed and tightened. (2) In (1), when inserting the bolt conveying device into the pipe, a part of the bolt hole of the overlapped pipe and the bolt hole of the joint metal are selected, and the position detection jig is inserted. , Insert the bolt conveying device into the pipe and let the position detecting jig be detected by the position detector arranged on the bolt conveying device,
A method for joining bolts between a tube and a joint metal, wherein the bolt conveying device is stopped at a predetermined position. (3) A bolt conveying device to be inserted into a pipe, which has a traveling roller at a lower portion, a guide roller on both sides, and an operation bar connected to a conveying table, wherein the bolt is elastically mounted in an upright state with respect to a joint surface. When the bolt head is pulled out,
A bolt in a pipe, comprising a plurality of bolt holders capable of forming a support surface for closing the bolt head to prevent retreat, and a position detector for detecting a bolt hole in the pipe. Transport device. (4) In (3), the bolt holder for elastically holding the bolt in an upright state with respect to the joining surface is composed of an opposing bolt holder that can be elastically opened and closed by a replaceable spring body. An in-tube bolt conveying device, characterized in that an inclined surface is formed on the back side of a body bolt holding surface, and a supporting surface is formed to prevent the bolt head pulled out to the tip end surface from retreating. (5) In (3), the position detector for detecting the position of the bolt hole of the tube is a tip of a dummy bolt as a position detection jig inserted into the bolt hole of the tube and the bolt hole of the joint hardware. And a stopper for stopping the bolt conveying device at a predetermined position by locking the bolt conveying device at a predetermined position. (6) In (5), a dummy bolt which is inserted into the bolt hole of the tube and the bolt hole of the joint hardware and locks the stopper of the bolt conveying device, and is inserted into the bolt hole of the tube and the bolt hole of the joint hardware. When inserted, at least the shaft diameter of the portion located in the bolt hole of the tube is smaller than the bolt hole diameter of the tube and larger than the shaft diameter of the bolt, and the tip end projects into the tube. A dummy bolt for locking the stopper. (7) A bolt pull-out jig for pulling out a bolt elastically held upright in a bolt holder of a bolt transfer device inserted into a pipe through a bolt hole in which a pipe and a metal fitting joined to the pipe are overlapped. A gripping cylinder with a local slit for elastically gripping the bolt tip at one tip is replaceably mounted, and the other tip comprises a rod formed with a handle. At least the outer diameter of the tip region is formed to be smaller than the bolt hole diameter, the inner diameter of the nut, and the hole diameter of the washer, so that the washer and the nut can be inserted when the tube is inserted into the bolt hole in which the joint metal is overlapped. A jig for pulling out a bolt in a pipe, characterized by being characterized in that: (8) The jig for pulling out a bolt in a tube according to (7), wherein a claw that is engaged with the tip of the bolt is formed at the tip of the gripping cylinder. (9) The jig for withdrawing a bolt in a tube according to (7), wherein the distal end portion of the rod body or the holding cylinder has a magnetic attachment function using a permanent magnet.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, an inexpensive through bolt (including a torcia-type high-strength bolt) is used to connect a tube and a joint metal.
It is applied when joining with a nut using a nut, and when bolting the joining hardware to the tube, a bolt transfer device equipped with a bolt holder that holds a plurality of bolts in an upright state is inserted into the tube. Insert and stop in place,
From the outside, insert a bolt extraction jig through which a washer and a nut are inserted into the bolt hole of the superposed pipe and the bolt hole of the joint hardware, and insert the tip of the bolt (Torcia-type high-strength bolt) In the case of, grip the pin tail), pull it out through the bolt hole, project the tip of this bolt to the outside of the joining hardware, transfer the washer and nut to the tip of this bolt, and screw and tighten the nut It was made.

In the present invention, (1) a traveling roller is mounted on a bolt conveying device having a bolt holder elastically holding a bolt in an upright state with respect to a joining surface to reduce movement resistance and move the bolt. In addition, the guide rollers with springs are provided on both sides of the tube so as to be position-adjustable with respect to the inner surface of the tube, and the position accuracy is stably secured in response to a change in the tube size.

The bolt conveying device may be moved automatically or may be moved by manually operating a connected operation rod. In the case of manual operation, it is also effective to provide a distance scale on the operation rod to enable efficient movement and alignment of the bolt transfer device. This operation rod is prepared in a plurality of lengths so as to be able to select and use a preferable length depending on the distance by which the bolt transfer device is moved, or a joint portion close to the end of the pipe body. It is also possible to use an extendable or expandable one so that it can be used for joints far from the distance.Especially, when performing the bolt joining work with the pipe body slanted or vertical, move the bolt transfer device to the predetermined position. An engaging portion with a tube for suspending and supporting the tube may be provided. It is effective to attach an illuminating device to the bolt conveying device so that the position of the bolt tip in the tube can be sufficiently determined from the outside through the bolt hole.

(2) It is necessary to stop the bolt transfer device at a predetermined position in order to surely align the bolt hole of the tube with the tip of the bolt held by the bolt holder of the bolt transfer device. For this purpose, for example, a dummy bolt is inserted as a position detection jig into the bolt hole of the overlapped pipe and the bolt hole of the joint hardware, and a stopper is provided as a position detector on the bolt transport device that moves in the pipe. Then, by mechanically locking the stopper to the dummy bolt, the bolt transfer device can be easily and reliably stopped at a predetermined position.

This dummy bolt can also be used as a positioning jig when the bolt hole of the tube and the bolt hole of the metal joint are overlapped. When inserted, the shaft diameter of at least the portion located in the bolt hole of the tube is smaller than the bolt hole diameter of the tube in order to reduce the play between the bolt hole of the tube and secure the accuracy of alignment. It is important that the diameter is larger than the shaft diameter of the bolt, and that the tip portion protrudes into the tube.

Further, in order to prevent the dummy bolt from falling into the tube and to project the dummy bolt into the tube by a predetermined length corresponding to the stopper position, the dummy bolt is locked with a head, a locking portion or a taper. Preferably, a structure is formed. When forming the locking portion, it is also effective to be able to adjust the locking position.

Other means for stopping the bolt transfer device at a predetermined position include a tube, a joint hardware, and a position detector using electrical, optical, and mechanical means for the bolt transfer device; Jig) and other position detection means
A position detection system for running / stopping the bolt transport device based on the position detection information from the position detection means can be used. In this case, automatic operation or automatic operation and manual operation can be used together. It is effective to provide, for example, a rotation stopping mechanism (for example, a brake) for the traveling roller of the bolt transfer device so that the bolt transfer device does not deviate from a predetermined position. In this case, the operation of the operation rod and the position detector can be utilized.

(3) Although the bolt holder may be a cylindrical body, even if the bolt head diameter is slightly different, the bolt holder may be formed by forming a bolt head support surface at the upper end to secure a stable supporting position. From the viewpoint of preventing the bolt from retreating during the pulling process, the opposing bolt holding body that can be elastically opened and closed by a replaceable spring body elastically clamps the joint surface upright and secures the upright state stably. To be able to
It is more advantageous to form an inclined surface on the back side of the bolt holding surface of the bolt holding body to reduce the bolt pull-out resistance.

When the bolt head is pulled out of the bolt holder, the opposing bolt holding member is closed by the action of the spring body to form a support surface for preventing the bolt head pulled out from being retracted at the tip end surface. However, it is possible to prevent the bolt from retreating into the holding body. As the spring body used here, a small-diameter coil spring or rubber spring (for example, rubber band or string rubber) is inexpensive and easy to attach and detach. In particular, in the case of rubber bands, the clamping force can be easily adjusted, which is convenient.

Since the shape and size of the bolt, the hole diameter and the arrangement of the bolt often differ depending on the size of the tube, the type and size of the metal fittings, a dedicated bolt conveying device may be prepared for each type. In order to cope with a smaller number of bolt transfer devices, it is effective to adjust the position of each bolt holder.

As the position adjustment method, the bolt holder is fixed by screwing, and a screw hole arrangement pattern is selected in advance so as to be able to cope with a plurality of types. A general method such as sliding in the direction, pinning and fixing can be used. It is also possible to use a method in which a support plate of a batch exchange type in which bolt holders are arranged in advance corresponding to various sizes is prepared, and the support plate is mounted on a dual-purpose bolt transfer device. It is also effective to adjust the height position.For example, the support plate of the bolt holder can be supported on the transfer table via a height position adjustment mechanism, or the height of the bolt mounting table of the bolt holder can be changed. It is effective to

(4) A bolt pull-out jig is used to pull out a bolt elastically held by a bolt holder of a bolt transfer device at a predetermined position in a pipe through a bolt hole. It is easy to replaceably attach a gripping cylinder with a local slit that elastically grips the distal end portion to the distal end portion by screwing or the like, and it is also easy to remove the bolt from the distal end portion after pulling out the bolt. Also,
It is effective to form a taper at the inner end of the inner surface of the gripping tube so that the inner surface diameter increases outward, so that the inner end of the gripping tube can be easily fitted to the end of the bolt.

Since it is necessary to use a gripping cylinder corresponding to the shape and the outer diameter of the tip end of the bolt, it is advantageous to prepare a plurality of types of gripping cylinders so that they can be easily replaced. It is. Attaching the handle to the other end is advantageous in that the gripping cylinder is pushed into the end of the bolt and the bolt is easily pulled out.

A washer and a nut are inserted through at least a tip region of the bolt extracting jig including the gripping cylinder. Therefore, the outer diameter of the tip region is smaller than the bolt hole diameter, the nut inner diameter, and the washer hole diameter. Need to be. This drawer jig
It is formed of a hollow body together with the gripping cylinder, and when the draw-out jig is inserted from the bolt hole, the position of the tip of the bolt on the bolt conveying device can be checked with the handle through the hollow so that the position can be confirmed with the handle. It is effective to make In addition,
In order to reinforce the bolt gripping force of the pulling jig by the gripping cylinder, it is effective to form a claw that locks the bolt tip at the tip of the gripping cylinder, or to make the gripping cylinder have a magnetic attachment function with a magnet. It is.

The bolt joining to which the present invention is applied can be performed at a factory or a construction site. For example, when the bolt is bonded at a factory, a bolt transfer device is installed in a pipe with the pipe placed horizontally on a work table. Insertion, manual operation of the operating rod, and movement to stop at a predetermined position for joining. In general, when the pipe is a square steel pipe, four surfaces are bolted joint surfaces, and there are many cases where there are a plurality of joints in the longitudinal direction. It is necessary to stop at a plurality of joints in the direction and perform bolt joining.

If only one surface (upper surface) can be joined by a single insertion of the bolt transfer device, the pipe is turned four times, and the operation of entering and exiting the bolt transfer device is performed four times. Need to be performed, the work load is large and the required time is long.
It is preferable to reduce the number of outgoing operations as much as possible. In that sense,
In order to be able to bolt-join, for example, two joints within the same side (plane) of the rectangular steel pipe without changing the position of the bolt carrier, the bolt holder is connected to the bolt carrier for two joints (for example, four joints). × 2 places) is also effective.

As a method of turning the tube, for example, a method in which a wire is slung on the tube and a lifting point in a circumferential direction is selected by a crane to turn the tube at an arbitrary angle is simple. As another method, a turning device provided with a driving device can be used. For example, if the joining on the upper surface and the joining on both sides of the tube are performed within the range of one entry / exit operation of the bolt transfer device, the number of turns of the tube and the input / output of the bolt transfer device are determined. Reduce the number of outgoing operations (1
If it can be performed once, the number of turns can be one, and the input / output operation can be performed twice).

In this case, it is not possible to simultaneously perform the joining on the upper surface and the joining on the side surface of the tubular body at the same position because the bolt holder groups provided on the upper surface side and the side surface interfere with each other. In order not to interfere with the bolt holder group and the bolt holder for side joining, for example, a bolt holder group for side joining is displaced in the length direction from the position of the bolt holder group for top joining, for example, first, If joining is performed on the side surface and then the bolt transfer device is moved by the amount shifted and joining on the upper surface is performed, the joining on the upper surface can be performed without turning the pipe within the range of one entry and exit operation It is possible to perform the joining on the side.

If the bolt holders cannot be arranged at the same position on both sides due to the relationship between the length of the bolts and the dimensions of the tube, the bolt holders may interfere with each other in the same way as described above. In order not to dispose, the bolt holder group on the side is shifted at the front and back in the length direction, firstly bolted with the bolt of the front bolt holder group, and then only the amount shifted By moving the bolt conveying device so as to perform the bolt joining by the bolts of the bolt holder group on the rear side, the bolt joining is performed on both sides without turning the pipe within the range of one entry / exit operation. It is possible.

It is to be noted that the bolt transfer device may be inserted and joined only from one end side of the tube using one unit, or may be inserted and joined from both ends. When the pipe is long and has many bolted joints, two bolt transfer devices may be prepared and inserted from both sides of the pipe to perform simultaneous bolt joining.

Although the above description has been made by taking as an example the case where bolt connection between a rectangular tube and a metal joint is performed in a factory, the bolt joint between the tube and the metal joint in the present invention is basically performed as follows. Bolt joining between the circular tube and the joining hardware can also be performed. At the time of bolt connection between the circular tube and the metal joint, it is necessary to use a rotation stopping means so that the bolt connection operation can be performed smoothly.

The bolt joining operation can be performed not only at a factory but also at a construction site. When performed at a factory, the pipe is kept horizontal, and the upper surface side and the side surface are mainly bolted.In this case, at the construction site, in addition to the pipe being horizontal, The present invention may be performed in an oblique state or a vertical state, and the present invention is basically applicable to any state.

[0032]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, a split tee (joint metal) is used for a pipe used as a column material, ie, a square steel pipe column.
At the time of constructing a construction member as shown in FIG. 16 by attaching an H-shaped steel beam through a steel pipe, a split tee (joining hardware) is previously passed through a square steel pipe column at a factory, and a bolt (for example, a torcia-type high-strength bolt) is inserted. ) Is applied to the case of joining using).

In FIG. 1 (a), 1 is a square steel tubular column,
At two locations in the axial direction (here, location A and location B)
Each side (four sides) has a plurality of bolt holes 7 (4) for attaching split tees 5 as shown in FIG.
The split tee 5 has a square steel pipe column 1
Bolt holes 8 for bolting to
A beam 3 having a plurality of bolt holes 10 as shown in FIG.
Are provided with a plurality of bolt holes 9 for bolting the flanges 3f of the rectangular steel pipe column 1 to A,
At points B, A 'and B', the split tee 5 is brought into contact with the square steel pipe column 1 so that the bolt holes 7 and 8 overlap each other, and the bolt 11 is inserted through the bolt holes 7 and 8. And tighten the nut 12 by screwing.
A construction member as shown in (d) is constructed.

In this embodiment, such a construction member is constructed in a factory in advance.
As shown in the figure, the square steel pipe column 1 was placed sideways on a work table wt of a factory equipped with a crane (not shown) above, and through bolts were clamped in the square steel pipe column 1. A bolt conveying device 15 provided with a plurality of bolt holders 14a to 14d is inserted, and a rectangular steel pipe column 1 and a split tee 5 are formed on the upper surface side of the rectangular steel pipe column 1 using a bolt extracting jig 18.
2 shows an example in which bolt joining is performed.

FIGS. 2 and 3 show a dummy bolt 13 as a position detecting jig and a stopper 16 as a position detector, in which the bolt conveying device 15 is inserted into the rectangular steel pipe column 1 and the bolt holes 7 and 8 of the split tee 5. To stop at a predetermined position, and the bolt holders 14a to 14a
The four through bolts 11 elastically clamped by 14d are aligned with the rectangular steel pipe column 1 and the bolt holes 7 and 8 of the split tee 5, respectively. This shows a state in which the washer 17 is gripped by the gripping cylinder 19 at the tip of the bolt extraction jig 18 inserted.

In this case, this bolt connection is performed by connecting the square steel tube column 1
For example, for each side (face), one flange of a beam to be joined is joined in units of B (here, bolt joining at A is joined by one-side bolts at the site), and is square. The split tee 5 is brought into contact with the steel pipe column 1 so that the bolt holes 7 and 8 coincide with each other.
8, a bolt conveying device 15 having bolt holders 14a to 14d elastically holding a plurality of (four) through bolts 11 is inserted into the rectangular steel tube column 1 in which the dummy bolts 13 are inserted. Bolt transport device 1 for bolt 13
By contacting a stopper 16 disposed on the near side of the 5 (here, near the bolt holders 14a, 14b), the tip of each through-bolt 11 and each of the bolt holes 7, 8 are aligned.

After the positioning, the tip of each through-bolt 11 (pin tail in the case of a torcia-type high-strength bolt) is gripped by a bolt extracting jig 18 (holding cylinder 19) in which the nut 12 and the washer 17 are inserted. Pull out through bolt holes 7 and 8,
The tip of the thread forming portion of the through bolt 11 is projected outside,
The washer 17 and the nut 12 are moved (in this case, dropped) from the bolt extracting jig 18 (the gripping cylinder 19), and the nut 12 is screwed and tightened.
(The dummy bolt 13 and the bolt extraction jig 18 are removed at appropriate times).

As shown in FIG. 1D, a split tee 5 is bolted to the square steel pipe column 1 at a position B on each side (four sides). In this example, a bolt conveying device is used. With 15 stopped at the same position, bolt joining on each side (4 surfaces) cannot be performed.

For this reason, the rectangular steel pipe column 1 is turned in the circumferential direction, for example, by 90 ° using a crane (not shown), and then the bolt conveying device 15 is inserted into the rectangular steel pipe column 1 for each side (one surface). For each side (one surface), the bolt conveying device is stopped at the B position, and the bolts are joined, and the A 'position and the B' position (not shown) are further provided on the front side. In the case where there is, first, the bolt transfer device 15 is moved to the position B ′ to perform the bolt joining at the position B ′, and then the bolt transfer device 15 is once moved out of the square steel tubular column 1 to The bolt is loaded into the holder, and the bolt conveying device 15 is moved to the front B position in the square steel tubular column 1 to perform the bolt connection at the B position.

After the bolt connection at two places (B and B ') on this side (one surface) is completed in this way, the bolt transfer device 15 is once moved out of the square steel tube column 1 and retracted. , Rotate the square steel tube column 1 90 degrees with a crane,
The bolt joining of the next side (surface) is performed in the same manner as described above.

A basic configuration example of the bolt transport device 15, the dummy bolt 13, and the bolt extracting jig 18 used in the present invention, and an example of a bolt joining procedure by these operations will be described below.

As shown in FIGS. 2 and 3, the bolt conveying device 15 has a traveling roller 20 at a lower portion, and guide rollers 22a and 22b whose relative positions can be adjusted at the mounting position by the mounting bolt 21 on both sides. A carriage 24 having an operating rod 23 rotatably movable up and down, left and right and exchangeable.
The position of the bolt holders 14a to 14d, which elastically clamp the through bolt 11 in an upright state with respect to the joining surface, can be adjusted vertically by the position adjusting device 25, and the position of the bolt holders 14a to 14d can be adjusted by adjusting the mounting position by the mounting bolt 26. It is arranged as possible. Then, the frontmost bolt holders 14a, 1
A stopper 16 having a cutout for detecting the dummy bolt 13 inserted in the bolt holes 7 and 8 of the rectangular steel pipe column 1 and the split tee 5 is provided near 4b.

In the figure, reference numeral 27 denotes a brake for preventing a displacement of the bolt transfer device 15 stopped at a predetermined position. Reference numeral 28 denotes an illuminating lamp, and the bolt conveying device 1
5 is stopped at a predetermined position, the bolt holder 14a
The position of the tip of the through-bolt 11 gripped by 14d is for illuminating the bolt holes 7 and 8 from outside the bolt holes 7 and 8 for easy visual confirmation.

The bolt holders 14a to 14d provided in the bolt transfer device 15 have a structure as shown in FIG. (Here, the bolt holder 14a
A representative explanation is given below. That is, the bolt holder 14a is formed on the support members 29a and 29b (29a and 29b may be integrally formed) opposed to each other at a distance L larger than the diameter D of the head 11h of the through bolt 11 to be clamped. , The holding bodies 30a, 30b respectively
Are rotatably mounted, and the opposed holding bodies 30a, 3a
0b has a structure for applying a clamping force by a spring 31. A mounting table 32 for mounting the head 11h of the through bolt 11 is provided below the opposing supports 29a and 29b. , 29b, and 32 may be formed integrally.) In addition, a spring 3 is provided above the sandwiching bodies 30a and 30b.
1 forms an openable / closable holding hole 33 for holding the shaft portion 11s of the through bolt 11, and a support surface 30f capable of supporting the head 11h of the through bolt 11 at an upper end of the holding hole. .

The holding diameter a of the holding hole 33 is equal to the through bolt 11.
In order to stabilize the position accuracy when the
It is set slightly smaller than the diameter d of the s portion. Further, an inclined surface 30t is formed between the lower end of the holding hole 33 and the upper end inside the supports 29a and 29b.

The bolt 1 is inserted through the bolt holder 14a.
The operation of holding the bolts 1 is performed before the bolt conveying device 15 is inserted into the square steel tubular column 1, and by holding the through bolts 11 by hand in the state of FIG. 4, the elasticity of the spring 31 of the bolt holder 14a is adjusted. Pressing down with a pushing force exceeding the force (sets the elastic force and the holding force that can be easily pushed in.) The holding hole 33 is pryed open, and the through bolt 11 is moved in the state shown in FIG. With the elastic force of 31, the bolt holder 14a can be elastically held. In this state, the diameter a of the holding hole 33 is equal to the diameter d of the shaft 11s of the through bolt 11.
And almost match.

Next, when the through bolt 11 clamped by the holder 14a in this manner is pulled out by a bolt pulling jig 18 through which a washer and a nut are inserted, as shown in FIG. The head 11h is the holding body 30a, 30
By the effect of the inclined surface 30t of b, the holding hole 33 is gradually opened by easily overcoming the elastic force of the spring 31, and the head 11h of the through bolt 11 is released from being held by the holding bodies 30a and 30b. As shown in b), the holding bodies 30a, 30b
Returns to the state before the through bolt 11 is clamped by the elastic force of the spring 31.

In this state, the head 11 of the through bolt 11
h is supported by the support surface 30f on the upper surface of the holding body, and there is no risk of dropping (retreating) by its own weight. In this state, since the tip of the thread forming portion of the through bolt 11 projects outside as shown in FIG. 7C, the washer, the nut is dropped, the nut is screwed and tightened, and the drawing jig is used. 18 can be stably removed.

As shown in FIG. 8 (a), the bolt pull-out jig 18 used in the present invention
The gripping cylinder 19 formed with several longitudinal slits 34 for elasticity elastically gripping the distal end of the cylinder is replaceably mounted,
It consists of a rod 36 having a handle 35 formed at the other end,
The outer diameter of at least the distal end region of the holding cylinder 19 having the hole 19o and the rod 36 is the hole diameter of the bolt hole 7 of the square steel tubular column 1,
The diameter of the bolt hole 8 of the split tee 5, the inner diameter of the nut 12, and the diameter of the washer 17 are smaller than the diameter of the bolt hole 7.
And the bolt hole 8 so that the through bolt 11 can be easily pulled out from the bolt hole 7 and the bolt hole 8 in a gripped state.

The gripping cylinder 19 attached to the tip of the rod 36
Are prepared in accordance with the shape and diameter of the end of the through bolt 11 to be gripped, and when worn or damaged, need to be replaced. Female screw 3 on the inner surface of the tip of the rod 36 of the tool 18
6a, and cut a male screw 1
9a is cut so that the rod 36 and the holding cylinder 19 can be easily screwed together. Reference numeral 37 in FIG.
This is for confirming the position of the leading end of the through bolt 11 on the bolt transfer device while communicating with the hole 19o of the gripping cylinder 19 attached to the leading end of the bolt 6 and being inserted into the bolt holes 7 and 8.

Next, FIGS. 2 and 9 to 1 show an example of a bolt joining procedure of the square steel tubular column 1 and the split tee 5 using the above-described bolt conveying device 15 and the bolt extracting jig 18.
4 will be described.

(1) Square steel pipe column 1 and split tee 5
A bolt conveying device 15 is prepared in accordance with the size of the bolt holes 7, 8 and the arrangement thereof, and the through bolts 11 are pushed into the bolt holders 14a to 14d of the bolt conveying device from the head side. The holder is placed upright and held elastically.

(2) As shown in FIGS. 2 and 3, the square steel pipe column 1 is mounted on a worktable wt.
At the joint of the square steel pipe 5 and the split tee 5, the dummy bolts 13 are inserted into the bolt holes 7 and 8 on the near side (the insertion side of the bolt conveying device 15) so that the bolt holes 7 and 8 coincide with each other. The split tee 5 is brought into contact with the rectangular steel pipe column 1 so that the tip of the dummy bolt 13 protrudes into the square steel pipe column 1.

(3) Bolt transfer device 1 in rectangular steel tube column 1
5 is pushed by the operating rod 23, and the stopper 16 is brought into contact with the dummy bolt 13, so that the bolt holders 14a to 14d of the bolt transport device 15 (here, representatively described by the bolt holders 14b and 14d) are resilient. The ends of the through bolts 11 that have been properly held can be aligned with the bolt holes 7 and 8 of the square steel tubular column 1 and the split tee 5, respectively. In this state, the operating rod 23 is lowered to actuate the brake 27 and fix the position so that the position does not shift.

(4) A bolt extraction jig 18 in which a nut 12 and a washer 17 are inserted is inserted into the bolt holes 7 and 8 into which the dummy bolt 13 is not inserted. By pushing into the tip of the through bolt 11 elastically held by the bolt holder 14d,
By the action of the slit 34, the bolt 11
Elastically grips the tip of the.

(5) When the bolt extracting jig 18 is pulled up from the state shown in FIGS. 2 and 3, the state shown in FIG. 10 is passed through the state shown in FIG. 9, that is, the holding by the bolt holder 14d is released, and the through bolt 11 is supported by the support surface 30f at the upper end of the bolt holder 14d, and falls (retreats) into the bolt holder 14d under its own weight.
Don't worry. At this time, the tip of the thread forming portion of the through bolt 11 projects from the upper surface of the split tee 5, so that the washer 1 inserted through the bolt pull-out jig 18.
7 and the nut 12 are automatically dropped into the end of the thread forming portion of the through bolt 11, so that the nut 17 can be easily removed.
Can be screwed and tightened.

After the tightening, the gripping tube 19 of the draw-out jig 18 is removed from the tip of the through bolt 11, and the joining on the bolt holder 14d side is completed as shown in FIG. Then, after the dummy bolt 13 is pulled out from the bolt holes 7 and 8 on the front side, the bolt pulling jig 18 into which the nut 12 and the washer 17 are inserted is inserted from the bolt holes 7 and 8 into the bolt holder 14b. The distal end of the through bolt 11 is elastically gripped by the gripping cylinder 19 by the action of the slit 36 by pushing the gripping cylinder 19 at the distal end into the distal end of the through bolt 11 elastically held by the bolt holder 14b.

(6) Jig 1 for pulling out bolt from the state of FIG.
8 is pulled out, the state of FIG. 13 is passed through the state of FIG. 12, that is, the holding by the bolt holder 14b is released,
The head 11h of the through bolt 11 is attached to the bolt holder 14b.
Is supported by the support surface 30f at the upper end of the bolt holder 14b, and there is no fear of falling (retreating) into the bolt holder 14b by its own weight.

At this time, since the tip of the thread forming portion of the through bolt 11 projects from the upper surface of the split tee 5, the washer 17 and the nut 12 inserted into the bolt extracting jig 18 are screwed into the thread of the through bolt 11. Since the nut automatically shifts to the tip of the forming portion, the nut 12 is screwed and temporarily tightened. Then, as shown in FIG. Bolt transfer device 1
5 is moved outward (to avoid interference between the stopper 16 and the head of the through-bolt) and the temporarily tightened nut 12 is tightened, thereby completing the joining on the bolt holder 14b side.

(7) As shown in FIG. 1, when there are two joints on the side (one surface) of the rectangular steel tube column 1, a position B on the near side and a position B ′ on the front side, When the bolting at the point B ′ is completed, the bolt transport device 15 is once taken out, and
The above operations (1) to (6) are performed, and bolt joining is performed at the point B.

(8) When the bolt connection within the side (one surface) of the square steel tubular column 1 is completed, the wire is slung on the square steel tubular column 1 in the state where the bolt conveying device 15 is once taken out, and the lifting position is set. Is shifted by 90 degrees, suspended by a crane (not shown), turned around by 90 degrees, and the same operation as the above (1) to (7) is performed on the next side (the other surface). In this manner, the bolt joining is performed for each side of each side of the rectangular steel tubular column 1, and the entire joining can be completed.

The present invention is not limited to the above embodiment. For example, the above embodiment is applied to bolt joint between a square steel pipe column and a split tee, but can also be applied to bolt joint between a square steel pipe and other joint hardware at a construction site, The present invention is also applicable to the case where a circular steel pipe and a metal joint are bolted. This bolt connection can be performed not only at a factory but also at a construction site.

The structure and arrangement of the bolt transfer device (including bolt holders, guide rollers, position detectors, etc.), the structure of the drawing jig (holding cylinder), the structure and arrangement of the position detection jig, the bolt joining procedure, etc. There is a change within a range that satisfies the claims according to the size of the rectangular steel pipe column, the joint hardware, the beam, and the like to be joined, the shape and size of the bolt, the hole diameter of the bolt, the arrangement, and the like.

In the above-described embodiment, the bolt transfer device is provided with one (four) bolt holders for one joint, and the bolt holder is inserted into and removed from the rectangular steel pipe column in joint units. Bolt holders for two joints (for example, eight) are provided in the transfer device, and they can be inserted into and removed from the rectangular steel pipe column in units of two joints. A holder may be provided to reduce the number of times the bolt transfer device is inserted into and removed from the rectangular steel tube column.

In the above embodiment, the dummy bolt 1
When the pull-out jig 18 is inserted from the bolt holes 7 and 8 into which the bolt 3 has been inserted, and the bolt 11 is pulled up from the bolt holder, the head 11h of the bolt 11 interferes with the stopper 16 and cannot be pulled up. The stopper is retracted by moving the transport trolley. For example, a mechanism for retracting the stopper via the through bolt 11 or the like by inserting the pull-out jig 18 from the bolt holes 7 and 8 or by pulling up is used. Thereby, the retreating movement of the bolt transport trolley may be avoided.

[0066]

According to the present invention, pipes such as square steel pipes and circular steel pipes and metal fittings can be easily formed at a factory or a construction site by bolting using inexpensive through bolts. The amount can be greatly reduced, the bolt cost can be greatly reduced compared to the case where only one side bolt is used, and the construction period is shortened while reducing the labor burden, and the total construction cost is reduced. Significant savings can be made.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing an example of a joint structure of a rectangular steel pipe column and a beam to which the present invention is applied. FIG. 1 (a) is a three-dimensional explanatory view showing a rectangular steel pipe column, and FIG. Three-dimensional explanatory view showing a joint metal (split tee) used to attach the steel, (c) is a three-dimensional explanatory view showing a beam to be attached to the square steel pipe column via the joint metal, and (d) is a figure joined to the square steel pipe column The three-dimensional explanatory drawing which shows the example of the construction member which joined the metal by bolt.

FIG. 2 is a partial cross-sectional side view illustrating an embodiment of the present invention.

FIG. 3 is an explanatory plan view as seen from arrows Aa-Ab in FIG. 3;

4A is an explanatory side view showing a structural example of a bolt holder according to an embodiment of the present invention, and FIG.
FIG. 3C is an explanatory plan view taken along the line Ba-Bb in FIG.
(B) Side sectional explanatory drawing shown by Ca-Cb arrow of a figure.

5A is an explanatory side view showing an example of a state in which a through-bolt is attached to the bolt holder of FIG. 4; FIG.
FIG. 2 is an explanatory plan view as viewed in the direction of arrows Da-Db in FIG.

6A is an explanatory side view showing an example of a state in which a through-bolt is held by a bolt holder in FIG. 4; FIG.
(A) Plan view explanatory drawing shown by Ea-Eb arrow of a figure.

7A is an explanatory side view showing an example of a state in which a through-bolt is pulled up from the bolt holder in FIG. 4; FIG. 7B is a state in which the head of the through-bolt is supported at the upper end of the bolt holder; (C) is a side sectional view showing the leading position of the through bolt in the state shown in (b).

FIG. 8A is a side view showing an example of the structure of a drawer jig according to an embodiment of the present invention, and FIG. 8B is a three-dimensional view showing an example of the structure of the gripping cylinder shown in FIG.

FIG. 9 is a partially cutaway side sectional explanatory view showing an example of a bolt joining work procedure (an example of a bolt pulled up state) in the embodiment of the present invention.

FIG. 10 is a partially cutaway side sectional explanatory view showing an example of a bolt joining operation procedure (an example of a state in which a nut is screwed into a bolt) in the embodiment of the present invention.

FIG. 11 is a partially cut-away cross-sectional side sectional view showing an example of a bolt joining operation procedure in the embodiment of the present invention (an example of a state in which a nut is screwed to a bolt and an example of a state in which another bolt is gripped by a drawing jig); .

FIG. 12 is a partially cutaway side sectional explanatory view showing an example of a bolt joining operation procedure (an example of a pulled-up state of another bolt) in the embodiment of the present invention.

FIG. 13 is a partially cutaway side sectional explanatory view showing an example of a bolt joining operation procedure (an example of a nut screwing start state to another bolt) in the embodiment of the present invention.

FIG. 14 is a partially cut-away side cross-sectional view showing an example of a bolt joining operation procedure (an example of a state in which a nut is screwed into another bolt and an example of movement of a bolt conveying device to a next joining point) in the embodiment of the present invention. FIG.

FIG. 15 is a three-dimensional explanatory view showing an example of a joint structure between a square steel tubular column and a beam using a conventional through diaphragm.

FIG. 16 is a three-dimensional explanatory view showing an example of a conventional joint structure between a square steel pipe column and a beam using a metal joint and a one-side bolt.

FIG. 17 (a) is a three-dimensional explanatory view showing a structural example of a bolt insertion jig used in an example of a method of joining a hollow column and a beam using a conventional joining hardware and through bolts, and FIG. Sectional explanatory view showing a state in which a bolt insertion jig of FIG. (A) holding a bolt body in a pillar is inserted, and FIG. (C) shows a state in which the bolt body is lifted up from a holder of the bolt insertion jig by a hanging tool, and is externally mounted. Sectional explanatory drawing which shows the state temporarily fixed by the side.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Square steel pipe (column) 2 Diaphragm 3 H-section steel 4 Beam attachment part 5 Split tee (joining hardware) 6 One side bolt 7 Bolt hole (square steel pipe column) 8 Bolt hole (split tee) ... for joining square steel pipe column 9 Bolt hole (split tee) ... for beam joining 10 Bolt hole (beam) ... for split tee joining 11 Through bolt 11h Bolt head 11s Bolt shaft 12 Nut 13 Dummy bolt 14a to 14d
Bolt holder 15 Bolt transport device 16 Stopper 17 Washer 18 Bolt pull-out jig 19 Gripping cylinder 19a Male screw 19o Hole 20 Running roller 21 Mounting bolt (guide roller) 22a, 22b Guide roller 23 Operation rod 24 Carrier 25 Position adjustment mechanism 26 Mounting Bolt (bolt holder) 27 Brake 28 Illumination lamp 29a, 29b Support 30a, 30b Holder 30t Inclined surface 30f Support surface 31 Spring 32 Mounting table 33 Holding hole 34 Vertical slit 35 Handle 36 Rod 36a Female screw 37 Viewing hole 39 Insert Jig 40 Support hole 41 Holder 42 Insert jig 43 Bolt 43s Bolt shaft 44 Hollow column 45 Outer bracket 46 Bolt hole (hollow column) 47 Bolt hole (outer bracket) 48 Suspension tool 49 Plate stopper wt Work bench

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Nobuyoshi Uno 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Corporation Technology Development Division (72) Inventor Masahiro Nagata 2-6-3 Otemachi, Chiyoda-ku, Tokyo F-term in Nippon Steel Corporation (reference) 2E125 AA03 AA13 AB01 AB16 AB17 AC15 AC16 AG04 AG12 AG43 AG49 BB12 BB22 BB37 BD01 BE02 BE06 BF01 CA01 CA05 CA14 EA01 EA33

Claims (9)

[Claims] 1. When a metal joint is bolted to a tube,
A bolt transfer device equipped with a bolt holder that holds a plurality of bolts in an upright state is inserted into the pipe and stopped at a predetermined position, and the bolt holes of the overlapped pipe and the bolt holes of the joint hardware are externally connected to the bolt holes. Then, insert the bolt extraction jig through which the washer and nut are inserted, fit the bolt holding cylinder at the tip of this extraction jig into the tip of the bolt held by the bolt holder, and push it in. By pulling out the bolt extraction jig while holding it with the bolt gripping cylinder, it is projected to the outside of the joint hardware, the washer and nut are transferred from the extraction jig to the bolt tip, and the nut is screwed and tightened. Bolt joining method between pipe and joining hardware. 2. The method according to claim 1, wherein when the bolt conveying device is inserted into the tube, a part of the bolt hole of the overlapped tube and a part of the bolt hole of the joint metal are selected and a position detecting jig is inserted. 2. The method according to claim 1, further comprising: inserting the bolt conveying device into the pipe, detecting the position detecting jig with a position detector disposed on the bolt conveying device, and stopping the bolt conveying device at a predetermined position. The method for joining bolts between a pipe and a joint hardware according to the above. 3. A bolt conveying device to be inserted into a pipe, having a traveling roller at a lower portion, a guide roller on both sides, and a conveying table connected to an operation rod, wherein the bolt is mounted upright on a joint surface. A plurality of bolt holders capable of forming a support surface for holding and holding the bolt head when the bolt head is pulled out when the bolt head is pulled out, and a position detection for detecting a bolt hole in the pipe body. A bolt conveying device in a pipe, comprising a vessel. 4. A bolt holder for elastically holding a bolt in an upright state with respect to a joint surface, comprising a pair of opposing bolt clamps which can be elastically opened and closed by a replaceable spring body.
4. The bolt holding body according to claim 3, wherein an inclined surface is formed on the back side of the bolt holding surface of the bolt, and a support surface for preventing the bolt head pulled out to the tip end surface from retreating is formed. In-tube bolt transfer device. 5. A position detector for detecting a position of a bolt hole of a tube is engaged with a lower portion of a dummy bolt as a position detecting jig inserted into the bolt hole of the tube and a bolt hole of a metal joint. The bolt conveying device according to claim 3, wherein the stopper is a stopper for stopping the bolt conveying device at a predetermined position. 6. The dummy bolt according to claim 5, wherein the dummy bolt is inserted into the bolt hole of the pipe and the bolt hole of the metal fitting to lock a stopper of the bolt conveying device. When inserted into the hole, at least the shaft diameter of the portion located in the bolt hole of the tube is smaller than the bolt hole diameter of the tube, and larger than the shaft diameter of the bolt,
A dummy bolt for locking a stopper, the tip of which protrudes into a tube. 7. A bolt drawer for pulling out a bolt elastically held in an upright state by a bolt holder of a bolt conveying device inserted into a pipe through a bolt hole in which a pipe and a metal fitting joined to the pipe are overlapped. A jig, a bar having a local slit with a local slit for elastically gripping a bolt tip at one end, and a bar formed with a handle at the other end, comprising a gripping tube and a rod; At least the outer diameter of the distal end region of the body is formed to be smaller than the bolt hole diameter, the inner diameter of the nut, and the hole diameter of the washer, so that the washer and the nut can be inserted when inserted into the bolt hole where the pipe and the joint metal are overlapped. A bolt extracting jig for a tubular body, characterized in that: 8. The jig for pulling out a bolt in a pipe according to claim 7, wherein a claw for locking the tip of the bolt is formed at a tip of the gripping cylinder. 9. A jig for withdrawing a bolt in a tube according to claim 7, wherein the tip portion or the holding cylinder of the rod has a magnetic attaching function by a permanent magnet.