JP2000192665A - Tool and method for tightening column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform locking by smoothly being matched to a tightening tool positioned in a column by projecting a locking part inserted in a column and locked on the tightening tool on the circumference to provide a guide coming into contact with the inner face of the column. SOLUTION: A conical guide 54 projected on the circumference of a locking part 51 for a tightening tool 50 and coming into contact with the inner face of a column 21 is provided. Next, an upper story building unit is mounted on a lower story building unit, the upper column 21 of the upper story building unit is mounted on the edge of the interposition projection part 62 of the fitting body 61 of the tightening tool 60 temporarily set on the lower column 21 of the lower story building unit, and the upper column 21 is vertically matched to the lower column 21. Next, the locking part 51 is inserted in an inner part from the upper end opening part of the upper column 21, the outer edge part of the guide 54 is abutted on the inner face of the column 21, the recess conical face of the guide 54 is mounted on the bolt 71 of the tightening tool 60, and the bolt 71 is matched on the locking part 51 of the center of the guide 54 to be introduced and locked. Thereby the locking part 51 of the edge of the tightening tool 50 is smoothly matched on the tightening tool 60 positioned in the column to be locked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a column fastening tool and method.

[0002]

2. Description of the Related Art Conventionally, when building a unit building,
As described in Japanese Patent Application Laid-Open No. 50-147113, as a method of fastening columns of upper and lower building units, a lower end plate provided at a lower end of an upper pillar and an upper end plate provided at an upper end of a lower pillar are provided. Are bolted in a pillar. At this time, in the prior art, using a fastening tool inserted into the pillar from outside the pillar, the nut gripped by the box spanner at the tip of the fastening tool, the tip screw of the bolt rising from the upper end plate of the lower floor building unit It is fastened in accordance with the part.

[0003]

However, the prior art has the following problems. A great deal of difficulty is involved in matching the nut gripped by the box spanner at the tip of the fastening tool to the tip thread of the bolt in the column.

By setting the outer diameter of the box spanner of the fastening tool to be slightly smaller than the inner diameter of the column, the spanner inserted into the column can be guided by the inner surface of the column to position the spanner at the center of the column. However, in this case, there is a problem in that the diameter of the box spanner becomes large and the operation weight of the fastening tool becomes excessive, and that it can only handle bolts located at the center of the column.

SUMMARY OF THE INVENTION It is an object of the present invention to easily and smoothly engage an engaging portion at a tip end of a fastening tool operated from outside a pillar with a fastener located inside the pillar.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided a column fastening tool for operating a fastener inserted into an upper column and a lower column from the outside of the column. An engaging portion that is attached to the tool, an operating portion that is located outside the column and that rotates the engaging portion, and a shaft portion that extends between the engaging portion and the operating portion; And a guide projecting around the inner surface of the pillar.

According to a second aspect of the present invention, there is provided the building according to the first aspect, wherein the guide has a conical plate shape, an engaging portion is provided on a central axis of a concave conical surface of the guide, and the guide is provided outside the guide. The diameter is set to be smaller than the column inner diameter and larger than half of the column inner diameter.

According to a third aspect of the present invention, there is provided the building according to the first aspect, wherein the guide has a plate shape that can be elastically deformed, and an engaging portion is provided on a center axis of the guide to reduce an outer diameter of the guide. It is designed to be set slightly larger than the inner diameter of the column.

According to a fourth aspect of the present invention, in the building, the upper floor building unit is mounted on the lower floor building unit, and the upper pillar of the upper floor building unit and the lower pillar of the lower floor building unit are provided. A method for fastening a column to be fastened by using the fastening tool according to any one of the above, wherein a step of vertically joining an upper pillar and a lower pillar, and inserting the fastening tool into the upper pillar and the lower pillar, and an engaging portion thereof And a step of rotating the fastening tool to fasten the fastener by rotating the fastening tool.

[0010]

According to the first aspect of the present invention, the following operations are provided. By hitting the outer edge of the guide provided so as to protrude around the engaging part at the tip of the fastening tool to the inner surface of the pillar,
The central engaging portion of the guide can be smoothly engaged with the fastener in the column. The guide is like an umbrella and is simple and lightweight.

According to the present invention, the following effects are obtained. Since the guide has a conical plate shape and is provided with an engaging portion on the central axis of the concave conical surface, after the fastener in the column is captured by a part of the concave conical surface, the fastener is moved to the conical surface. Can be smoothly introduced into the engaging portion located at the central top of the vehicle.

Since the outer diameter of the guide is set to be smaller than the inner diameter of the pillar and larger than half of the inner diameter of the pillar, the outer edge of the guide is placed on the inner surface of the pillar, and the guide is moved along the inner circumference of the pillar. The fastener can be reliably captured by the guide, either at the center in the inside or at any position away from the center in the column.

Since the outer diameter of the guide can be reduced to almost half of the inner diameter of the column, the weight can be reduced. In addition, since the outer diameter of the guide can be smaller than the inner diameter of the column, even if the opening diameter of the upper end of the column serving as the guide insertion port is smaller than the inner diameter of the column, the guide can be inserted,
Can be withdrawn.

According to the third aspect of the present invention, the following effects are obtained. Since the guide is slightly larger than the inner diameter of the column and has a plate shape that can be elastically deformed, when the guide is pushed into the inner surface of the column, the engaging portion on the center axis of the guide is immediately centered at the center of the column, and this engaging is performed. The part can be engaged with the fastener in the center of the column as it is.

Since the guide is slightly larger than the inner diameter of the column, it is deformed into a corrugated shape when it is pushed into and inserted into or pulled out from the inner surface of the column, but can withstand elasticity.

Since the guide can be elastically deformed, even if the upper end opening diameter of the pillar serving as the guide insertion port is smaller than the pillar inner diameter,
Guides can be inserted and pulled out. In addition, a guide having the same size can be adapted to another inner diameter of a pillar that is different due to a change in the thickness of a constituent plate of the pillar or the like, and the frequency of replacement of guides in a fastening tool can be reduced.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the installation process of a unit building, (A) is a perspective view showing a foundation, (B) is a perspective view showing a first floor portion, and (C) is a perspective view showing a second floor portion. FIG. 2, FIG. 2 is a side view showing a building unit, FIG. 3 is a side view showing another example of a building unit, FIG. 4 is a perspective view showing another example of a building unit, and FIG. FIG. 6 shows a fastening tool of the first embodiment, (A) is an overall side view,
(B) is a sectional view of a main part, (C) is an exploded perspective view, FIG. 7 is a sectional view showing a fastener, FIG. 8 shows a fastener inserted in a pillar, and (A) is an example of a circular pillar. , (B) is a plan view showing another example of a circular section column, (C) is a plan view showing an example of a rectangular section column, and (D) is a plan view showing another example of a rectangular section column. 9 shows a fastening process of a column, (A) is a sectional view showing an intermediate fastening state, (B) is a sectional view showing a completed fastening state,
10A and 10B show a use state of the fastening tool, FIG. 10A is a cross-sectional view showing a captured state of the fastener, FIG. 10B is a sectional view showing a state where the fastener is displaced from the center of the column, and FIG. 11 is a cross-sectional view showing the state of insertion and withdrawal from the column, FIG. 11 shows the fastening tool of the second embodiment, (A) is an overall side view, (B) is an exploded perspective view, and FIG. (A) is a plan view showing an example of a column having a circular cross section, (B) is a plan view showing an example of a column having a rectangular cross section, FIG. 13 shows an example of mounting a guide, and FIG. FIG. 14B is a side view showing an example in which a plurality of guides are stacked and mounted, FIG. 14B is a side view showing an example in which a plurality of guides are mounted separately, and FIG. 14 shows a guide deformation state of a fastening tool inserted in a pillar. FIG. 15 is a sectional view showing a state in which the fastening tool is inserted into and pulled out of the column.

(First Embodiment) (FIGS. 1 to 10) As shown in FIG. 1, a unit building 10 transports a plurality of factory-produced building units 11 to a construction site.
A foundation 12 is provided in advance at the construction site, and the building unit 11 is lifted and installed on the foundation 12.

(Building Unit) (FIGS. 2 to 5) At this time, the building unit to which the present invention is applied includes:
2 to 5 can be exemplified.

The building unit 11 shown in FIG. 2 is composed of a skeleton structure in which a column 21 and a floor beam 22 are joined, and a corner of a floor beam frame 23 in which four floor beams 22 are framed in a rectangular shape. The outer diaphragm 24 is welded to the column joint, which is a part, and the column 21 having a circular cross section is inserted into each outer diaphragm 24, and the outer diaphragm 24 is welded to an arbitrary height position of the column 21 without a ceiling beam. It is what was constituted. As the column 21, a round steel pipe or the like having a circular cross section can be adopted, and as the floor beam 22, a C-shaped steel or the like can be adopted. In the building unit 11, a floor panel 23 </ b> A is attached to the floor beam frame 23, and a ceiling panel 23 </ b> B is attached to the upper end of the column 21.

The building unit 11 shown in FIG. 3 is different from the building unit 11 shown in FIG. That is, in this building unit 11, the outer diaphragm 27 is welded to a column joint, which is a corner portion of a ceiling beam frame 26 in which four ceiling beams 25 are framed in a rectangular shape or a trapezoidal shape. A pillar 21 having a circular cross section is inserted into the column 21, and an outer diaphragm 27 is welded to an arbitrary height position of the pillar 21 to have a ceiling beam 25 in addition to the above-mentioned floor beam 22. In this building unit 11, in addition to the floor panel 23A being attached on the floor beam frame 23, a ceiling panel 26A is attached below the ceiling beam frame 26 for use.

The building unit 11 shown in FIG. 4 has a short groove-shaped floor beam 32 spanning between lower ends of columns 31 made of square steel pipes at four corners.
Is attached by welding and the long grooved floor beam 3
2 is attached by welding, and a mounting piece 3
3, a ceiling surface support member 34 is attached.

In the building unit 11 shown in FIG. 5, a short groove-shaped joint piece 42 is attached by welding between columns 41 made of square steel pipes at four corners by welding, and a short groove extending between the upper and lower joint pieces 42 is provided. Shaped ceiling beam 43 and floor beam 44
Are attached, and long groove-shaped ceiling beams 43 and floor beams 44 are attached.
A plurality of wooden beams 45 are erected between
A plurality of small beams 4 made of a square steel pipe between the long floor beams 44
6 is constructed.

(Column fastening structure) (FIGS. 6 to 10) However, in the unit building 10, the building unit 1
When any one of FIGS. 2 to 5 is adopted as 1, the upper-floor building unit 1 is placed on the lower-floor building unit 11 </ b> A.
1B, the lower pillar 21 of the lower-floor building unit 11A (or the pillar 31 of the building unit 11 in FIG. 4, the pillar 41 of the building unit 11 in FIG. 5, and so on) and the upper-floor building unit 1
Fastener 60 inserted into upper column 21 of 1B (FIG. 7)
Are fastened by the fastening tool 50 of FIG. 6 to fasten the upper column 21 and the lower column 21.

Hereinafter, each of the fastening tool 50 and the fastening tool 60 will be described. (Fastening Tool) (FIGS. 6 and 10) As shown in FIG. 6, the fastening tool 50 is a socket-shaped engaging portion 51 which is inserted into the inside of the column 21 and is engaged with a bolt 71 of the fastener 60 which will be described later. And an operating portion 52 such as a T-shaped handle, a torque wrench, or an impact wrench which is located outside the pillar 21 and rotationally operates the engaging portion 51, and extends between the engaging portion 51 and the operating portion 52. It has a shaft 53. The shaft portion 53 includes a square protrusion 53A that is fitted and connected to the square hole of the engagement portion 51, and includes a square hole 53B that is fitted and connected to the square protrusion of the operation portion 52.

At this time, the fastening tool 50 has a guide 54 projecting around the engaging portion 51 and in contact with the inner surface of the column 21. The guide 54 has a conical plate shape made of metal or plastic, and has an engaging portion 51 provided on the central axis of the concave conical surface. The outer diameter of the guide 54 is smaller than the inner diameter of the column 21, and is half the inner diameter of the column 21. It is set larger.

That is, in the fastening tool 50, the outer edge of the guide 54 inserted into the column 21 is applied to the inner surface of the column 21 and the concave conical surface of the guide 54 is
Of the fastening tool 50 and the bolt 71
, Or by rotating the fastening tool 50,
The bolt 71 can be easily introduced into and engaged with the engaging portion 51 at the center of the guide 54.

Since the fastening tool 50 only needs to apply a part of the concave conical surface of the guide 54 to the bolt 71, when the bolt 71 is at the center of the column 21, the outer diameter of the guide 54 is
1 can be reduced to half of the inner diameter and the weight can be reduced (FIG. 10).
(A)).

Even if the bolt 71 is displaced from the center of the column 21, a part of the concave conical surface of the guide 54 is
In this case, if the distance L between the bolt 71 and the inner surface of the column 21 is longer than the radius of the guide 54, the usable range of the fastening tool 50 becomes (FIG. 10B).

Further, since the outer diameter of the guide 54 of the fastening tool 50 can be smaller than the inner diameter of the column 21, even if the inner diameter of the upper end opening of the column 21 into which the fastening tool 50 is inserted is smaller than the inner diameter of the column 21, It can be inserted and pulled out from the pillar 21 (FIG. 10)
(C)).

(Fastener) (FIGS. 7 to 9) When using the fastener 60, the lower pillar 21 of the lower floor building unit 11A and the upper pillar 21 of the upper floor building unit 11B are used as shown in FIG. The upper column 21 has an upper engaging portion 28 that protrudes like a flange on the inner surface thereof, and the inner surface of the lower column 21 has a lower engaging portion 29 that protrudes like a flange. The upper engagement portion 28
It may be formed integrally with the main body 21A of the upper column 21, and the upper column 2
It may be provided on an additional ring body 21B added to the lower end of the main body 21A by welding or the like. The lower engaging portion 29 may also be formed integrally with the main body 21A of the lower pillar 21, or may be provided on an additional ring body 21B added to the upper end of the main body 21A of the lower pillar 21 by welding or the like. .

FIGS. 8 (A) and 8 (B) show an upper engaging portion 28 and a lower engaging portion 29 on a pillar 21 having a circular cross section made of a round steel pipe or the like in the building unit 11 of FIGS. Show what you have. FIGS. 8C and 8D show the building unit 11 of FIGS. 4 and 5 in which columns 31 and 41 made of square steel pipes are provided with an upper engaging portion 28 and a lower engaging portion 29. .

However, the fastener 60 is fitted to the upper engaging portion 28 of the upper column 21 and the lower engaging portion 29 of the lower column 21 to sandwich the engaging portions 28 and 29, thereby forming A fitting body 61 for fastening the column 21 and a fitting drive mechanism 70 for the fitting body 61 are provided. Here, the fitting drive mechanism 70 is operated by the above-described fastening tool 50, and the fitting body 6
1 is the upper engaging portion 28 of the upper pillar 21 and the lower engaging portion 29 of the lower pillar 21
The fitting bodies 61 can be pushed outward so as to be fitted to the fitting bodies 61.

More specifically, the fitting drive mechanism 70 comprises a bolt 71 and a curved ring plate 72 whose upper and lower ends are rotatably inserted into the bolt 71. The fitting body 61 is fixed to each of the side portions 73 provided at three (or four) positions as welding positions by welding or the like. The bolt 71 is loosely inserted from the upper plate of the plate-shaped body 72 and is screwed to the nut 24 welded to the lower plate. The rotation of the bolt 71 by the fastening tool 50 causes the ring of the plate-shaped body 72 to be squeezed and deformed from above and below, thereby causing the side portion of the plate-shaped body 72 to expand outward, resulting in each fitting. This is to push the union 61 outward (FIG. 9).

The fitting drive mechanism 70 may have the fitting body 61 at two or more equally spaced positions on the outer periphery of the plate-shaped body 72. FIG.
(A) and (C) show a configuration in which a total of three fitting bodies 61 are provided at three equally spaced positions on the outer periphery of the plate-like body 72. 8 (B) and 8 (D) show a configuration in which a total of four fitting bodies 61 are provided at four equally-spaced positions on the outer periphery of the plate-shaped body 72.

At this time, in the fitting body 61, it is preferable that the engaging portions 28 and 29 of the upper and lower columns 21 and the fitting surface of the fitting body 61 have a gradient. In the case where the inclination is provided, the fitting of the fitting body 61 to the engaging portions 28 and 29 can be performed more smoothly than that in the case of employing the straight engaging portions 28 and 29 and the fitting body 61. . In addition, the fitting body 61 is simply
The fitting body 61 can be tightly fitted to the engaging portions 28 and 29 without leaving a clearance only by pushing and fitting the fittings 8 and 29.

In the fitting body 61, a wedge-shaped interposition projection 62 interposed between the end surfaces of the upper column 21 and the lower column 21 is provided. The interposition protrusion 62 provided on the fitting body 61 is
When the fitting body 61 is fitted to the upper engaging portion 28 and the lower engaging portion 29 of the lower pillar 21, the fitting body 61 is located at a predetermined pushing position between the end faces of the upper and lower pillars 21 and can be seen from the outside. 61 can be visually confirmed. Also,
In the fitting process in which the fitting body 61 is inserted into the upper pillar 21 and the lower pillar 21, the distal end of the interposition protrusion 62 of the fitting body 61 is
And temporarily placed on the end face of the fitting body 61.
The upper pillar 21 can be installed on the tip of the interposed projection 62 of the above, and the joining operation of the upper pillar 21 and the lower pillar 21 by the fitting body 61 can be started.

Hereinafter, a procedure for fastening the upper column 21 and the lower column 21 by the fastener 60 using the fastening tool 50 will be described. (1) The lower-floor building unit 11A is fixed to the foundation 12.

(2) The distal end of the interposition protrusion 62 of the fitting body 61 constituting the fastener 60 is placed on the upper end surface of the lower pillar 21 of the lower floor building unit 11A, and the fastener 60 is temporarily placed.

(3) The upper floor building unit 11B is mounted on the lower floor building unit 11A, and the upper pillar 21 of the upper floor building unit 11B is temporarily placed on the lower pillar 21 of the lower floor building unit 11A. (2) The upper pillar 21 and the lower pillar 21 are placed on the tip of the interposition protrusion 62 of the fitting body 61 in FIG.

(4) The engaging portion 51 of the fastening tool 50 is
From the upper end opening of the upper pillar 21 and the lower pillar 21,
The outer edge of the guide 54 around the engaging portion 51 is applied to the inner surface of the column 21, and the concave conical surface of the guide 54 is
0 on the bolt 71, and the engaging portion 51 at the center of the guide 54.
The bolt 71 is aligned with the bolt and introduced and engaged (FIG. 9).
(A)).

(5) By rotating the fastening tool 50, the bolt 71 is rotated via the engaging portion 51. The fitting drive mechanism 70 of the fastener 60 deforms the curved ring plate 72 from above and below with the rotation of the bolt 71, and the fitting body 61 is moved outward by the expanding operation of the plate 72. Push it. As a result, the fitting body 61 pushes the interposed protrusion 62 between the end surfaces of the upper and lower columns 21 while moving the upper column 21.
The upper and lower engaging portions 28 and 29 are fitted into the lower engaging portion 29 of the lower column 21 to clamp the engaging portions 28 and 29, and as a result, the upper and lower columns 21 are fastened (FIG. 9B). .

(6) The fastening portion 51 of the fastening tool 50 is
0 from the bolt 71, and the fastening tool 50 is
Pull out from the top opening of the.

The fastener 60 is retained in the upper and lower columns 21, and the bolt 71 of the fastener 60 is
Is rotated in the opposite direction to the above (5), the fitting body 61 is pulled back inward, and the upper
The engagement between the lower engaging portion 29 and the lower engaging portion 29 of the lower column 21 is released, and as a result, the upper and lower columns 21 can be separated and disassembled.

Therefore, according to the present embodiment, the following operations are provided. The outer edge of the guide 54 provided so as to protrude around the engaging portion 51 at the tip of the fastening tool 50 is applied to the inner surface of the column, so that the central engaging portion 51 of the guide 54 can be more smoothly inserted into the column 21. It can be engaged with and engaged with the bolt 71 of the fastener 60. The guide 54 is shaped like an umbrella and is simple and lightweight.

Since the guide 54 has a conical plate shape and has the engaging portion 51 on the central axis of the concave conical surface, the bolt 71 of the fastener 60 in the column 21 is captured by a part of the concave conical surface. After that, the bolt 71 of the fastener 60 can be smoothly introduced into the engaging portion 51 located at the top of the center of the conical surface.

The outer diameter of the guide 54 is smaller than the inner diameter of the column,
The guide 54 is set larger than half of the inner diameter of the column.
When the guide 54 is moved along the inner periphery of the column 21 by placing the outer edge of the column on the inner surface of the column 21, the bolt 71 of the fastener 60 at the center of the column 21 or any bolt away from the center of the column 21 Any of the bolts 71 of the fastener 60 located at the position (1) can be reliably captured by the guide 54.

Since the outer diameter of the guide 54 can be reduced to almost half of the inner diameter of the column, the weight can be reduced. The guide 54
Can be smaller than the inner diameter of the column, so that the guide 54 can be inserted and pulled out even if the opening diameter of the upper end of the column 21 serving as the insertion port of the guide 54 is smaller than the inner diameter of the column.

(Second Embodiment) (FIGS. 11 to 15) The fastening tool 50A of the second embodiment is different from the fastening tool 50 of the first embodiment, as shown in FIG.
Is provided with a guide 55 instead of. Guide 55
Is held between the upper and lower screw collars 56A and 56B at the lower end of the shaft portion 53 to which the engaging portion 51 is connected, and protrudes around the engaging portion 51 in a state where the shaft portion 53 is rotatable. Is provided.

The guide 55 is a thin plate made of a material having a high yield point and capable of being elastically deformed, such as spring steel or plastic. The guide 55 is a disk, a square plate, and a wing-shaped plate having a plurality of wings, the outer diameter of which is set to be slightly larger than the inner diameter of the column 21, and the engaging portion 51 is arranged on the central axis thereof. . FIG. 12A shows a fastening tool 50A provided with a guide 55 made of three wing-like plates used as a pillar 21 having a circular cross section made of a round steel pipe in the building unit 11 of FIGS. 12 (B) shows a fastening tool 50A provided with a guide 55 consisting of four wing-like plates, and a column 3 of square section made of square steel pipe in the building unit 11 of FIGS.
1 and 41 are shown.

In the fastening tool 50A, when the guide 55 is elastically deformed and pushed into the column 21 (the same applies to the columns 31 and 41), the engaging tool on the center axis of the guide 55 under the action of the spring force of the guide 55. The attachment portion 51 is immediately centered on the center of the pillar 21, and the engagement portion 51 is aligned with the bolt 71 of the fastener 60 at the center in the pillar 21 and is engaged. At this time, the guide 5 provided at the lower end of the shaft 53
5 is not limited to one sheet, but as shown in FIG. 13A, the spring force can be adjusted by using a plurality of sheets in a stacked manner. Further, as shown in FIG. 13B, a plurality of guides 55 are formed.
If the guides 55 are spaced from each other with the intermediate collar 56C interposed therebetween, the centering retention of the engaging portion 51 by the guides 55 can be improved.

Therefore, according to the present embodiment, the following operations are provided. Since the guide 55 is slightly larger than the inner diameter of the column and has a plate shape that can be elastically deformed, when the guide 55 is pushed into the inner surface of the column 21, the engaging portion 51 on the central axis of the guide 55 is immediately moved to the center of the column 21. Centering, and this attachment part 51
Can be engaged with the bolt 71 of the fastener 60 at the center in the column 21 as it is.

Since the guide 55 is slightly larger than the inner diameter of the column, it is deformed repeatedly into a corrugated plate when inserted into or pulled out of the inner surface of the column 21.
Withstands elasticity (FIG. 14).

Since the guide 55 can be elastically deformed, the guide 55 can be inserted and pulled out even if the opening diameter of the upper end of the column 21 serving as the insertion port of the guide 55 is smaller than the column inner diameter (FIG. 1).
5). In addition, the guide 55 of the same size can be adapted to another pillar inner diameter that is different due to a change in the thickness of the column 21 and the like, and the frequency of replacement of the guide 55 in the fastening tool 50A can be reduced.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and the design can be changed without departing from the scope of the present invention. The present invention is also included in the present invention. For example, the present invention is not limited to fastening columns of building units constituting a unit building, but can be widely applied to fastening of general columns.

[0056]

As described above, according to the present invention, the engaging portion at the tip of the fastening tool operated from outside the column can be easily and smoothly fitted to the fastener located inside the column. Can be.

[Brief description of the drawings]

FIG. 1 shows the installation process of a unit building, (A)
Is a perspective view showing a foundation, (B) is a perspective view showing a first floor portion,
(C) is a perspective view showing the second floor portion.

FIG. 2 is a side view showing a building unit.

FIG. 3 is a side view showing another example of the building unit.

FIG. 4 is a perspective view showing another example of a building unit.

FIG. 5 is a perspective view showing another example of a building unit.

FIG. 6 shows a fastening tool according to the first embodiment, and (A)
Is an overall side view, (B) is a cross-sectional view of a main part, and (C) is an exploded perspective view.

FIG. 7 is a sectional view showing a fastener.

FIG. 8 shows the fastener inserted into the post, (A)
Is a plan view showing an example of a circular cross section column, (B) is a plan view showing another example of a circular cross section column, (C) is a plan view showing an example of a rectangular cross section column, and (D) is another plan view of a square cross section column. It is a top view which shows the example of.

FIGS. 9A and 9B show a fastening process of a column, FIG. 9A is a sectional view showing an intermediate fastening state, and FIG. 9B is a sectional view showing a fastening completed state.

FIG. 10 shows a use state of the fastening tool, and (A)
Is a cross-sectional view showing a state in which the fastener is captured, (B) is a cross-sectional view showing a state in which the fastener is displaced from the center of the column, and (C) is a cross-sectional view showing a state in which the fastener is inserted into and pulled out of the column. .

FIG. 11 shows a fastening tool according to a second embodiment,
(A) is an overall side view, and (B) is an exploded perspective view.

FIGS. 12A and 12B show a state in which the fastening tool is inserted into the column, FIG. 12A is a plan view showing an example of a circular column, and FIG. 12B is a plan view showing an example of a rectangular column.

13A and 13B show an example of mounting guides, FIG. 13A is a side view showing an example in which a plurality of guides are mounted on top of each other, and FIG.
FIG. 4 is a side view showing an example in which a plurality of guides are mounted separately.

FIG. 14 is a cross-sectional view showing a deformation state of a guide of a fastening tool inserted into a pillar.

FIG. 15 is a cross-sectional view showing a state in which a fastening tool is inserted into and pulled out of a pillar.

[Explanation of symbols]

 21 Pillar 50, 50A Fastening tool 51 Engagement part 52 Operation part 53 Shaft part 54, 55 Guide 60 Fastener

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E125 AA03 AB16 AB17 AC16 BB29 BB36 CA78 2E174 DA12 DA22 DA31 DA63 DA65 DA67

Claims (4)

[Claims] 1. A fastening tool for a pillar for fastening a fastener inserted into an upper pillar and a lower pillar from outside the pillar, comprising: an engaging part inserted into the pillar and engaged with the fastener;
An operating portion that is located outside the pillar and that pivotally operates the engaging portion; and a shaft portion that extends between the engaging portion and the operating portion, and that protrudes around the engaging portion and contacts the inner surface of the pillar. A tool for fastening a column, comprising a guide. 2. The guide has a conical plate shape, an engaging portion is provided on the central axis of the concave conical surface of the guide, and the outer diameter of the guide is set smaller than the inner diameter of the column and larger than half of the inner diameter of the column. The fastening tool for a column according to claim 1. 3. The tool according to claim 1, wherein the guide has a plate shape that can be elastically deformed, an engaging portion is provided on a central axis of the guide, and an outer diameter of the guide is set slightly larger than an inner diameter of the column. 4. The fastening according to claim 1, wherein the upper floor building unit is mounted on the lower floor building unit, and the upper pillar of the upper floor building unit and the lower pillar of the lower floor building unit are connected. A method of fastening a column to be fastened using a tool, comprising: a step of vertically joining an upper column and a lower column; inserting a fastening tool into the upper column and a lower column; And a step of rotating a fastening tool to perform a fastening operation of the fastener.