JP2693139B2 - How to join hollow columns and metal fittings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining a hollow column and a metal fitting for attaching a metal fitting to an outer surface or an inner surface of a metal hollow column.

[0002]

2. Description of the Related Art Conventionally, a metal fitting used for connecting another member such as a beam or a brace to an outer surface of a hollow metal column having a rectangular cross section has been used. For mounting the metal fitting, for example, a tapped hole is formed in the outer surface of the hollow column, and a bolt is screwed into the tapped hole of the hollow column through the through hole of the metal fitting while the metal fitting is in contact with the outer surface of the hollow column. By doing so, the fittings are attached.

In another example, a user holds a bolt body in his hand and puts his hand through an end opening of the hollow column to project the bolt body from the inside to the outside of the hollow column, and attaches a bracket to the bolt body. Like that.

[0004]

However, in the above-mentioned conventional example using the former tapped hole, the mounting strength of the bracket by the bolt body is weak, so that a large load is applied. It is difficult to adopt a structure for mounting the metal fittings of the supporting portion. In the case of the latter, it is difficult to insert the bolt up to the point where it cannot be reached.In addition, it is difficult to put the bolt out of the hollow column in accordance with the position of the hole provided in the hollow column. However, there is a problem that it is difficult to perform the work. Also, in the case of a long hollow column with a long length, it is not possible to connect the metal fittings because it is not possible to reach deep inside the hollow column, and in reality the length of the worker's arm The above method can be applied only to a hollow column having a length approximately equal to the dimension.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems. Even if a hollow pillar is inaccessible inside, the bolt body can be easily pulled out from the inside, and the bolt body that has been drawn out can be obtained. It is an object of the present invention to provide a joining method of a hollow column and a metal fitting in which a nut can be easily screwed in a state where the metal is temporarily fixed and a metal fitting can be firmly attached to an outer surface or an inner surface of the hollow column.

[0006]

In order to achieve the above object, in the invention of claim 1, the head 1b of the bolt body 1 is supported and the bolt body 1 is inserted into the hollow column 3 in an inverted state. Then, the hanging tool 6 is inserted into the hollow pillar 3 through the bolt holes 5 of the outer metal fitting 4 and the hollow pillar 3 which are attached along the outer surface of the hollow pillar 3, and then the bolt body 1 is lifted by the hanging tool 6. Bolt 1 is temporarily fixed in a state where the shaft portion 1a of the bolt body 1 is projected to the outside from the bolt hole 5, and then the bolt body 1 is projected to the outside.
The nut 7 is screwed into the shaft portion 1a of the
Are joined to each other.

According to the second aspect of the present invention, the shaft portion 1a of the bolt body 1 in a state of supporting and supporting the head portion 1b is inserted into the bolt hole 5 of the inner metal fitting 8 attached along the inner surface of the hollow column 3. In this state, the bolt body 1 and the inner metal fitting 8 are inserted into the hollow pillar 3, and then the bolt body 1 and the inner metal fitting 8 are lifted by the suspending tool 6 inserted into the hollow pillar 3 from the bolt hole 5 of the hollow pillar 3. The shaft portion 1a of the bolt body 1 is temporarily fixed in a state where it is projected to the outside from the bolt hole 5 of the hollow column 3, and then the nut portion 7 is screwed onto the shaft portion 1a of the bolt body 1 that protrudes to the outside to form a hollow column. The inner metal fitting 8 is attached to the inner surface of the metal plate 3.

According to a third aspect of the present invention, in the first or second aspect, the bolt body 1 has an upper surface 1b of the insertion jig 11 of the insertion jig 11 having the support plate 9 and the elongated handle 10. It is fitted in the support hole 12 and supported in an inverted state, and is arranged inside the hollow column 3 by inserting the support plate 9 into the hollow column 3 with the handle 10.

According to a fourth aspect of the present invention, in the first or second aspect, the suspending tool 6 has magnetic attachment means 2 at a lower end portion thereof, and the bolt body 1 is magnetically attached to the suspending tool 6 to be lifted. It is what In the invention of claim 5, claim 4
In the above, the magnetic attachment means 2 provided on the hanger 6 is covered with a cylindrical body 18 that does not pass magnetism, and the bolt body 1 has a shaft portion 1a.
It is characterized in that it is magnetically attached to the suspending tool 6 and is lifted up in a state in which

According to a sixth aspect of the present invention, in the first or second aspect, the hanging tool 6 is formed by the tube 19, and the bolt body 1 is lifted in a state where the shaft portion 1a is sucked into the tube 19. It is characterized by.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION On the outer surface or inner surface of a hollow column 3 having a U-shaped cross section, a metal fitting for reinforcing the hollow column 3 or connecting other members to the hollow column 3 is attached. The mounting of the metal fitting is performed by a bolt body 1 such as a torcia-type high tension bolt.

In the present invention, when the hollow pillar 3 and the metal fitting are joined using the bolt body 1, the shaft portion 1a of the bolt body 1 is projected from the inside of the hollow pillar 3 to the outside of the hollow pillar 3. The hollow column 3 and the metal fitting are joined to each other by using the bolt body 1 by screwing the nut 7 onto the shaft portion 1a of the body 1. When inserting and arranging the bolt body 1 into the hollow column 3, an insertion jig 11 as shown in FIGS. 7 and 8 is used.

The insertion jig 11 is mainly constructed by connecting a long bar-shaped handle 10 to one end of a support plate 9. The support plate 9 is made of a thin plate member having a substantially U-shaped cross section and having projecting pieces 9b projecting obliquely downward from both ends of the substrate 9a. The bolt body 1 is inverted on the upper surface as shown in FIG. There are provided a plurality of holding bodies 15 constituting the support holes 12 for holding in a state where they are held. The holding body 15 is formed of a rubber plate or the like having a concave portion 16, and the like.
By fitting the head 1b of the bolt body 1 into the concave portion 16, the bolt body 1 can be held in an inverted state. A part of the recess 16 is cut out and is open to the outside. When the head 1 b of the bolt body 1 is fitted into the recess 16, the cut 16
The end piece becomes an elastic piece at the portion a, and the head 1b of the bolt body 1 can be pressed and held in the recess 16 by the pressing force of the elastic piece and held in an inverted state. I have.

The height of the above-mentioned protrusion 9b is the bolt body 1
Is slightly larger than the height of the head 1b. Further, as the structure of the support plate 9 for holding the head portion 1b of the bolt body 1 and holding the bolt body 1 in the upright state, in addition to the above-described configuration, as shown in FIG. In which an electromagnet 20 or a permanent magnet capable of magnetically holding the head portion 1b of the bolt body 1 is installed, or as shown in FIG. 31, the head portion of the bolt body 1 is placed in the proper position on the upper surface of the support plate 9. The head 1b of the bolt body 1 is installed at an appropriate position on the upper surface of the support plate 9 as shown in FIG. 32, in which a sticky adhesive member 21 capable of adhesively holding 1b is installed.
It is conceivable that a pair of spring plates 22 that can hold the above are installed. When the bolt body 1 is pulled upward, the electromagnet 20 described above stops the magnetic force to facilitate the lifting movement of the bolt body 1, and
The adhesive force of the adhesive member 21 is such that the head portion 1b of the bolt body 1 can be adhered to hold the bolt body 1 in an inverted state and that the bolt body 1 is easily detached when the bolt body 1 is lifted upward. Also, in the above, the spring force is such that the bolt body 1 can be held in an inverted state and is easily released when the bolt body 1 is lifted upward.

As the handle 10 attached to the support plate 9, the bolt body 1 can be inserted into the hollow pillar 3 together with the support plate 9 in a state where the bolt body 1 is inverted with respect to the support plate 9 as shown in FIG. It is long as shown in. The suspending tool 6 for hoisting and supporting the bolt body 1 is mainly constituted by providing a magnetizing means 2 at a lower end portion of a bar material. By magnetizing the shaft portion 1a of the bolt body 1 by the magnetizing means 2, The bolt body 1 can be lifted. The magnetizing means 2 is constituted by arranging a magnet 2a such as a permanent magnet or an electromagnet at the lower end of the bar, or arranging a magnetic body such as a metal plate at the lower end of the bar and using this magnetic body by a magnet. It is possible to use a magnetized material.

In addition to the above-mentioned suspending tool 6, as shown in FIG. 24, the magnetizing means 2 is covered with a cylindrical body 18 which does not pass magnetism to the lower portion of the rod member, and the bolt body 1
Alternatively, the shaft 1a may be inserted into the cylindrical body 18 and magnetically attached to the hanging tool 6 so as to be lifted. In this case, since the magnetic attachment means 2 is covered with the cylindrical body 18 when the suspending tool 6 is inserted into the bolt hole 5, the suspending tool 6 is magnetically attached to the opening edge of the bolt hole 5. The magnetizing means 2 can be attached to the shaft portion 1a of the bolt body 1.
The work of hoisting the bolt body 1 by the hanger 6 magnetically attached to the hanger can be easily performed without taking time and effort.
Further, since the shaft portion 1a of the bolt body 1 is inserted into the cylindrical body 18 to hold the bolt body 1, the bolt body 1 can be lifted in a stable state.

Further, the suspending tool 6 may be composed of a tube 19 as shown in FIG. 25, and the suction device 23 may be provided on the tube 19. In this structure, the bolt body 1 is lifted while the shaft portion 1a is sucked into the tube 19. Further, as the hanging tool 6, as shown in FIG. 26, a holding cylinder 24 made of semi-hard rubber as used in a tire may be provided at least at the lower end portion. Of course, the whole may be made of semi-hard rubber. In this case, FIG.
As shown in (b), the holding cylinder 24 at the lower end of the suspender 6 inserted into the hollow column 3 through the bolt hole 5 is attached to the bolt hole 5.
The bolt hole 5 is lifted by being fitted on the shaft portion 1a.

Further, the hanging tool 6 may be a scissors jig 25 as shown in FIG. In this structure, the tip portion of the jig 25 is inserted into the hollow column 3 through the bolt hole 5, and the handle portion 26 is operated to hold the shaft portion 1a of the bolt hole 5 at the tip portion of the jig 25. The bolt hole 5 is lifted. Further, as the suspending tool 6, as shown in FIG. 28, a sticking member 27 may be provided on the tip of the bar. The adhesive member 27 has an adhesive property that can be easily removed without a trace by an operator's manual force after adhering. In this structure, the tip of the rod is inserted into the hollow column 3 through the bolt hole 5, and the adhesive member 27 at the tip is adhered to the shaft 1a of the bolt 1 to lift the bolt 1. Is.

Further, the hanging tool 6 may be as shown in FIG. In this structure, a holding cylinder 29 having a screw portion capable of being screwed into a screw portion provided on the shaft portion 1a of the bolt body 1 is provided on the inner surface of the lower portion of the cylinder body 28, and the hollow portion is hollow from the bolt hole 5. After being inserted into the pillar 3, the holding cylinder 29 can be screwed onto the shaft portion of the bolt body 1 to lift the bolt body 1.

As shown in FIG. 10, an outer metal fitting 4 as a metal fitting is arranged on the outer surface of the hollow pillar 3, and the bolt hole 5 provided in the hollow pillar 3 and the bolt hole 5 provided in the outer metal fitting 4 are aligned with each other. In this state, the bolt body 1 is arranged in an inverted state in the hollow column 3 via the support plate 9, and in this state, the above-mentioned suspending tool 6 is attached to the outer metal fitting 4 and the bolt hole 5 of the hollow column 3.
The head portion 1b of the bolt body 1 is disengaged from the recessed portion 16 of the support plate 9 and the shaft portion 1a of the bolt body 1 is projected to the outside of the bolt body 1 by inserting it inside and pulling the bolt body 1 upward. Then, the nut 7 is screwed onto the shaft portion 1a of the bolt body 1 after this, but in order to hold the shaft portion 1a of the bolt body 1 in a state of protruding from the bolt hole 5, the shaft of the bolt body 1 is held. A plate-like stopper 13 as shown in FIG. 6 is attached to the portion 1a so that the bolt body 1 can be temporarily held in a state in which the shaft portion 1a projects from the bolt hole 5 to the outside.

The plate-like stopper 13 is formed in an L-shape by a vertical piece 13a and a horizontal piece 13b made of a thin plate material, and a notch 14 which is recessed inward is formed in the middle of the front end of the horizontal piece 13b. It is provided. The cut portion 14 has a width dimension at the entrance portion larger than the diameter of the shaft portion 1a of the bolt body 1, and has a width dimension narrower toward the back, and the shaft portion 1a protruding from the bolt hole 5 is formed. The inner edge of the notch 14 is engaged with the threaded portion of the shaft portion 1a by being pushed into the notch 14 so that the bolt 1
Without falling into the hollow column 3, the shaft portion 1a
It is temporarily held in a more protruding state.

The upper edge portion of the vertical piece 13a is folded back. By folding the upper edge in this way, when the operator holds the vertical piece 13a of the plate-like stopper 13 by hand, the cut end of the vertical piece 3a is cut. The edge is not exposed to the upper edge, and it is possible to prevent the operator from cutting the hand when using the plate-like stopper 13. Then, when attaching the outer metal fitting 4 to the outer surface of the hollow column 3, a construction procedure will be described in the case where the hanging tool 6 having the magnetic attachment means 2 at the lower end is used as the hanging tool 6 used.

An outer metal fitting 4 is arranged on the outer surface of the hollow pillar 3, and the bolt hole 5 formed in the hollow pillar 3 and the bolt hole 5 formed in the outer metal fitting 4 are aligned with each other, as shown in FIG. The head portion 1b of the bolt body 1 is fitted into the recess 16 of the support plate 9 so as to be inverted with respect to the support plate 9, and the plurality of bolt bodies 1 are held on the support plate 9 in an inverted state. As shown in FIG. 11, a plurality of bolt bodies 1 are inserted and arranged inside the hollow column 3 together with the support plate 9 via the handle 10.

Next, the bolt body 1 is moved to the inner side of the hollow column 3 together with the support plate 9 through the handle 10. Here, the bolt body 1 can be easily attached to the inner side of the hollow column 3 which cannot be reached by the operator's arm due to the long handle 10.
Can be inserted and placed. Then, the bolt body 1 is positioned below the bolt hole 5 of the hollow column 3 and the outer fitting 4,
As shown in FIG. 2 and FIG. 12, the hollow column 3 is inserted from the bolt hole 5
The tip portion of the hanger 6 is inserted into the inside of the hanger 6 so that the magnetic attachment means 2 of the hanger 6 is magnetically attached to the shaft portion 1a of the bolt body 1 and the bolt body 1 is pulled upward to form a recess 16 in the support plate 9. The head portion 1b of the bolt body 1 held by the shaft portion 1a of the bolt body 1 is disengaged from the recessed portion 16 and the shaft portion 1a of the bolt body 1 projects outward from the bolt hole 5 of the outer metal fitting 4 as shown in FIGS. . Then, in this state, the plate-like stopper 13 is engaged with the shaft portion 1a of the bolt hole 5 as shown in FIG.
As shown in FIG. 14, the bolt body 1 is temporarily fixed with the bolt body 1 protruding further outward. In this way, the hanging device 6
As shown in FIG. 15, using the plate-like stoppers 13, the bolt bodies 1 are sequentially protruded from the bolt holes 5 to be temporarily fixed.

Next, the nut 7 is screwed onto the shaft portion 1a via the washer 17 as shown in FIG. 16 while the plate-shaped stopper 13 is temporarily fixed. Then, by removing the plate-like stopper 13 from the shaft portion 1a and tightening each nut 7 in a state where the nut 7 is screwed to the shaft portion 1a of each bolt body 1, as shown in FIG. The outer metal fitting 4 is joined to the outer surface of the hollow column 3 in such a manner that the nut 7 is screwed onto the shaft portion 1a of the bolt body 1 projecting toward the outside.

By repeating the above-described work in sequence, the outer metal fitting 4 as a metal fitting is joined to the entire outer surface of the hollow column 3 by the bolt body 1 as shown in FIG. Where the outer fitting 4
Is not limited to the case where it is provided on the entire outer surface of the hollow column 3, but may be attached only to an arbitrary outer surface of the outer surface of the hollow column 3. In the illustrated one, a case is shown in which the bolt body 1 having a flat lower surface side of the head 1b of the bolt body 1 to be brought into contact with the inner surface of the hollow pillar 3 is shown. A bolt body 1 provided with a fine projection on the lower surface side of the head 1b may be used, or a spring washer may be inserted between the lower surface of the head 1b of the bolt body 1 and the inner surface of the hollow column 3. When the nut 7 is tightened, the bolt body 1 may be prevented from rotating around.

Even if the hollow pillar 3 is long and inaccessible, the shaft 1 of the bolt body 1 can be easily pulled out by pulling the bolt body 1 inserted thereinto to the outside by means of the hanger 6.
Since a can be projected from the inside of the hollow column 3 to the outside, the metal fitting can be easily joined to the outer surface of the hollow column 3 with a small number of steps. Further, in the illustrated one, the outer metal fitting 4 has a substantially T shape, and has a shape capable of connecting other members such as beams and braces, but the hollow pillar 3 is reinforced. It may be in the form of a thin flat plate.

18 to 20 show a case where the inner metal fitting 8 as a metal fitting is mounted inside the hollow column 3. In this case, the head 1b of the bolt body 1 is fitted into the recess 16 of the support plate 9 so that it is inverted with respect to the support plate 9, and a plurality of bolt bodies 1 are inverted with respect to the support plate 9. Then, as shown in FIG. 18, the inner metal fitting 8 is attached to the bolt body 1 by inserting the bolt holes 5 into the shaft portions 1a of the bolt bodies 1. In this state, the support plate 9, each bolt body 1, and the inner metal fitting 8 are inserted and arranged in the hollow column 3 while holding the handle 10.

Here, the long shank 10 allows the bolt body 1 to be easily inserted and arranged even inside the hollow column 3 which cannot be reached by the operator's arm. And
Position the bolt body 1 below the bolt hole 5 of the hollow column 3,
As shown in FIG. 19, a plurality of suspenders 6 are used to insert the tip of the suspender 6 into the hollow column 3 through the bolt holes 5, and the suspender 6 moves the bolt body 1 and the inner metal fitting 8 upward. Raise to. Here, the head 1b of the bolt body 1 held in the recessed portion 16 of the support plate 9 is lifted up by the suspending tool 6 so that the head portion 1b of the bolt body 1 is disengaged from the recessed portion 16 and the shaft portion of the bolt body 1 is removed. 1a is an outer metal fitting 4 as shown in FIG.
Of the bolt body 5, and then in this state, the plate-like stopper 13 is engaged with the shaft portion 1a of the bolt hole 5 so that the bolt body 1 is retained with the shaft portion 1a protruding from the bolt hole 5 to the outside. Temporarily stop. Next, the washer 17 is attached to the shaft portion 1a while the plate-like stopper 13 is temporarily fixed.
The nut 7 is screwed onto the shaft portion 1a of each bolt body 1 and the plate-like stopper 13 is screwed onto the shaft portion 1a of the bolt body 1.
As shown in FIG. 20, the nut 7 is screwed onto the shaft portion 1a of the bolt body 1 projecting from the inside to the outside of the hollow column 3 by detaching the nut 7 and tightening the nuts 7. The inner metal fitting 8 is joined to the inner surface of the pillar 3.

In the illustrated example, a case is shown in which the bolt body 1 having a flat lower surface side of the head 1b of the bolt body 1 to be brought into contact with the surface of the inner metal fitting 8 is shown. However, a bolt body 1 provided with a fine projection on the lower surface side of the head 1b may be used, or a spring washer may be inserted between the lower surface of the head 1b of the bolt body 1 and the surface of the inner metal fitting 8. In this way, when the nut 7 is tightened, the bolt body 1 may be prevented from rotating around.

Even if the hollow pillar 3 is long and inaccessible, the shaft of the bolt body 1 can be easily attached by magnetically attaching the suspender 6 to the bolt body 1 inserted therein and pulling it out. The portion 1a can be projected from the inside of the hollow column 3 to the outside, and the fitting of the metal fitting to the inner surface of the hollow column 3 can be easily performed with a small number of steps. 21 to 23, the inner metal fitting 8 as a metal fitting is mounted inside the hollow pillar 3 and the outer metal fitting 4 as a metal fitting is mounted outside the hollow pillar 3.
Shows the case of mounting.

In this structure, the outer metal fitting 4 is arranged on the outer surface of the hollow pillar 3, and the bolt hole 5 bored in the hollow pillar 3 and the bolt hole 5 bored in the outer metal fitting 4 are aligned with each other. , The head portion 1b of the bolt body 1 is fitted into the recess 16 of the support plate 9 so as to be inverted with respect to the support plate 9, and the plurality of bolt bodies 1 are held with the support plate 9 in the inverted state. The inner metal fitting 8 is attached to the bolt body 1 by inserting the bolt holes 5 into the shaft portions 1a of the bolt bodies 1 as shown in FIG. In this state, the support plate 9, each bolt body 1, and the inner metal fitting 8 are inserted and arranged in the hollow column 3 while holding the handle 10.

Then, the bolt body 1 is positioned below the bolt hole 5 of the hollow column 3, and a plurality of suspenders 6 are used to suspend it from the bolt hole 5 inside the hollow column 3 as shown in FIG. The tip of the tool 6 is inserted and the bolt body 1 and the inner metal fitting 8 are pulled up by the lifting tool 6. Here, the head 1b of the bolt body 1 held in the recessed portion 16 of the support plate 9 is lifted up by the suspending tool 6 so that the head portion 1b of the bolt body 1 comes off the recessed portion 16 and the shaft portion of the bolt body 1 is removed. As shown in FIG. 22, 1a projects outward from the bolt hole 5 of the outer metal fitting 4,
Then, in this state, the plate-like stopper 13 is engaged with the shaft portion 1a of the bolt hole 5 to temporarily fix the bolt body 1 with the shaft portion 1a protruding outside from the bolt hole 5. Next, the nut 7 is screwed to the shaft portion 1a through the washer 17 while the plate stopper 13 is temporarily fixed, and the plate stopper 13 is screwed to the shaft portion 1a of each bolt body 1. 23 is removed from the shaft portion 1a and each nut 7 is tightened, and as shown in FIG. 23, the shaft portion 1a of the bolt body 1 projecting from the inside of the hollow column 3 toward the outside.
The inner metal fitting 8 is joined to the inner surface of the hollow column 3 by screwing the nut 7 to the outer metal fitting 4 and the outer metal fitting 4 is joined to the outer surface of the hollow column 3 by the bolt body 1.

In the illustrated example, the case where the bolt body 1 in which the lower surface side of the head portion 1b of the bolt body 1 to be brought into contact with the surface of the inner metal fitting 8 is flat is used is shown. However, the bolt body 1 in which a minute protrusion is provided on the lower surface side of the head portion 1b is used, or a spring washer is inserted between the lower surface of the head portion 1b of the bolt body 1 and the surface of the inner metal fitting 8. In this way, it is possible to prevent the bolt body 1 from rotating around when tightening the nut 7.

In this structure, even if the hollow pillar 3 is long and inaccessible to the inside, the bolt body 1 inserted inside can be easily pulled out to the outside by the suspender 6. The shaft portion 1a of the hollow pillar 3 can be protruded from the inside of the hollow pillar 3 to the outside, and the fitting of the fitting to the inner surface of the hollow pillar 3 can be easily performed with a small number of steps. At the inside of the hollow pillar 3 inside metal fitting 8
By arranging, the strength of the mounting portion of the outer metal fitting 4 can be improved, and the outer metal fitting 4, the inner metal fitting 8 and the hollow column 3 can be joined by the same bolt body 1. Is.

Further, in the illustrated example, the outer metal fitting 4 has a substantially T-shape, and has a shape capable of connecting other members such as beams and braces. It may be in the form of a thin flat plate for reinforcing 3.

[0037]

According to the first aspect of the present invention, an outer metal fitting is attached to the inside of the hollow column in a state where the head of the bolt is supported and the bolt is inverted, and is then attached along the outer surface of the hollow column. Insert the suspending tool into the hollow column through the overlapping bolt holes of the hollow pillar, then lift the bolt body with the suspending tool and temporarily fix it with the shaft part of the bolt body protruding outside from the bolt hole, and then externally. It is characterized in that the nut is screwed onto the shaft part of the protruding bolt body to join the outer metal fitting and the hollow column to each other, so that even if the hollow column cannot be reached inside, it is inserted inside. The shaft of the bolt body can be easily projected from the inside of the hollow column to the outside simply by locking the hanging device to the bolt and pulling it out. The metal fittings on the outer surface of the hollow pillar are less Those that can be easily performed have man-hours.

According to the second aspect of the present invention, the shaft portion of the bolt body, which is in an inverted state with the head being supported, is inserted into the bolt hole of the inner metal fitting mounted along the inner surface of the hollow column, and the inside of the bolt body is inserted. Insert the metal fitting inside the hollow pillar, then lift the bolt body and the inner metal fitting with the hanging tool inserted into the hollow pillar through the bolt hole of the hollow pillar, and project the shaft of the bolt body to the outside from the bolt hole of the hollow pillar. It is characterized in that the inner bracket is attached to the inner surface of the hollow column by temporarily fastening it in the state where it is attached, then screwing the nut onto the shaft part of the bolt that protrudes to the outside, so that the hollow column cannot be reached inside. However, the shaft of the bolt body can be easily projected from the inside of the hollow column to the outside simply by locking the hanging tool to the bolt body inserted inside and pulling it out. We adopted the form that the bolt body is projected from the inside to the outside. The bonding of metal to the outer surface of the reluctant hollow column with a small number of steps in which can be easily performed.

According to a third aspect of the present invention, in the bolt body according to the first or second aspect, the head portion of the bolt body is fitted into the support hole on the upper surface of the support plate of the insertion jig having the support plate and the elongated handle portion. The bolt is supported in an inverted state, and is arranged inside the hollow column by inserting the support plate into the hollow column with a handle portion. Therefore, in addition to the effect of claim 1 or 2, the bolt is provided. The body can be easily inserted and arranged at a predetermined position inside the hollow column in an inverted state.

The invention according to claim 4 is characterized in that, in claim 1 or claim 2, the suspending tool has magnetic attachment means at a lower end portion thereof, and the bolt body is magnetically attached to the suspending tool to be lifted. In addition to the effect of claim 1 or claim 2, the bolt body, which is difficult to see from the outside of the hollow column, can be easily lifted by magnetic attachment. The invention of claim 5 is
According to claim 4, the magnetic attachment means provided on the suspender is covered with a cylindrical body that is impermeable to magnetism, and the bolt body is magnetically attached to the suspender and lifted up with the shaft portion inserted in the cylindrical body. As a characteristic, in addition to the effect of claim 4, it is possible to prevent the lower end of the suspender from being magnetically attached to the metal fitting or the hollow column due to the difference in inserting the suspender into the bolt hole. Is. Further, since the cylindrical body is inserted into the shaft portion of the bolt body, the bolt body can be lifted in a stable state without damaging the shaft portion of the bolt body.

The invention of claim 6 is claim 1 or claim 2.
In (1), the hoisting tool is formed of a tube, and the bolt body is hoisted in a state where the shaft portion is sucked into the tube. It is possible to lift the bolt body in a stable state without damaging the shaft portion of the bolt body.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating a joining method according to the present invention.

FIG. 2 is an explanatory diagram illustrating a state in which a bolt body of the same is pulled up.

FIG. 3 is an explanatory view illustrating a joining state by a bolt body.

FIG. 4 is an explanatory diagram illustrating a state in which a plurality of metal fittings are joined.

FIG. 5 is an explanatory diagram illustrating a state in which a bolt body is supported on a support plate.

FIG. 6 is a perspective view showing a plate-like stopper.

FIG. 7 is a perspective view showing a support plate and a recess.

FIG. 8 is a perspective view of an insertion jig.

FIG. 9 is a perspective view showing an example of a bolt hole formed in a hollow column.

FIG. 10 is a perspective view showing an arrangement state of outer metal fittings on an outer surface of a hollow column.

FIG. 11 is an explanatory diagram for explaining the insertion state of the insertion jig into the hollow column.

FIG. 12 is an explanatory diagram illustrating a usage example of the hanging tool.

FIG. 13 is an explanatory diagram illustrating a usage example of the hanging tool.

FIG. 14 is an explanatory diagram illustrating an example of use of a plate-shaped stopper.

FIG. 15 is an explanatory diagram illustrating an example of use of a plate-shaped stopper.

FIG. 16 is an explanatory diagram illustrating a nut attachment state.

FIG. 17 is an explanatory diagram illustrating a nut attachment state.

FIG. 18 is an explanatory view illustrating a bonding method according to another example of the present invention.

FIG. 19 is an explanatory view illustrating a state in which the bolt body and the inner metal fitting are pulled up in the same as above.

FIG. 20 is an explanatory diagram illustrating a joining state by a bolt body.

FIG. 21 is an explanatory diagram illustrating a joining method according to still another example of the present invention.

FIG. 22 is an explanatory view illustrating a state in which the bolt body and the inner metal fitting are lifted up.

FIG. 23 is an explanatory diagram illustrating a joined state using a bolt body.

FIG. 24 is a view showing another example of the hanging tool, (a) is an explanatory view for explaining the arrangement state of the cylindrical body, and (b) is an explanatory view for explaining the use state.

FIG. 25 is an explanatory diagram illustrating another example of the hanging device.

FIG. 26 is a view showing another example of the hanging device, (a) is an explanatory view for explaining the shape of the lower end portion, and (b) is an explanatory view for explaining the usage state.

FIG. 27 is an explanatory diagram illustrating another example of the hanging device.

FIG. 28 is an explanatory view illustrating another example of the hanging tool.

FIG. 29 is an explanatory diagram illustrating another example of the hanging device.

FIG. 30 is a view showing another example of the support plate, (a) is an explanatory view for explaining a holding state of the bolt body, and (b) is a perspective view.

31A and 31B show another example of the support plate, FIG. 31A is an explanatory view for explaining a holding state of the bolt body, and FIG. 31B is a perspective view.

32A and 32B show another example of the support plate, FIG. 32A is an explanatory view illustrating a holding state of the bolt body, and FIG. 32B is a perspective view showing the holding state of the bolt body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bolt body 1a Shaft part 1b Head part 2 Magnetic sticking means 3 Hollow column 4 Outer metal fitting 5 Bolt hole 6 Lifting tool 7 Nut 8 Inner metal fitting 9 Support plate 10 Handle part 11 Insertion jig 12 Support hole 18 Cylindrical body 19 Tube

Claims (6)

(57) [Claims] 1. A bolt hole in which an outer metal member and a hollow column are overlapped with each other, the bolt being supported by the head of the bolt column, inserted into the hollow column in an inverted state, and then attached along the outer surface of the hollow column and the hollow column. Insert the suspender into the hollow pillar, then lift the bolt body with the suspender and temporarily secure the bolt body with the shaft of the bolt body protruding from the bolt hole. A method for joining a hollow pillar and a metal fitting, wherein a nut is screwed into the portion to join the outer fitting and the hollow pillar to each other. 2. The bolt body and the inner metal fitting inside the hollow pillar with the shaft portion of the bolt body in a state of supporting the head and being inserted up through the bolt hole of the inner metal fitting attached along the inner surface of the hollow pillar. Then, temporarily suspend the bolt body and the inner metal fitting with the hangers inserted into the hollow pillar through the bolt hole of the hollow pillar, and project the shaft of the bolt body to the outside from the bolt hole of the hollow pillar. A method for joining a hollow column and a metal fitting, characterized in that the inner metal fitting is attached to the inner surface of the hollow pillar by screwing a nut onto the shaft portion of the bolt body protruding to the outside and then screwing the nut. 3. The bolt body is supported in an upright state by being inserted into a support hole on an upper surface of a support plate of an insertion jig having a support plate and an elongated handle portion, and supported by the handle portion. 3. The method according to claim 1, wherein the plate is inserted into the hollow column by inserting the plate into the hollow column. 4. The joining of a hollow pillar and a metal fitting according to claim 1 or 2, wherein the suspender has a magnetic attachment means at a lower end thereof, and the bolt body is magnetically attached to the suspender to be lifted. Method. 5. The magnetic attachment means provided on the suspender is covered with a cylindrical body that does not transmit magnetism, and the bolt body is magnetically attached to the suspender and lifted up with the shaft portion inserted in the cylindrical body. 5. The method for joining a hollow column and a metal fitting according to claim 4. 6. The hollow pillar and the metal fitting according to claim 1 or 2, wherein the suspender is formed of a tube, and the bolt body is lifted in a state where the shaft portion is sucked into the tube. Joining method.