JP2002294876A - Column fastening structure and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably, surely, and rigidly join upper and lower columns in the simple constitution. SOLUTION: This fastening structure of the columns 21 has an widening tool 70 for mutually expansively opening mutually juxtaposed fitting bodies 61, and engaging an engaging projection part 61A of the respective fitting bodies 61 with an upper annular groove 28 of the upper column 21, and a lower annular groove 29 of the lower column 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, as a fastening structure for rigidly connecting upper and lower columns, as described in Japanese Patent Application Laid-Open No. 12-192554, a fitting body inserted inside an upper column and a lower column is engaged with an upper column. In some cases, the fitting portion and the lower pillar are fitted to the lower engaging portion, and the fitting body sandwiches the upper and lower engaging portions. At this time, as a fitting drive mechanism for keeping the fitting body fitted in the upper and lower engaging portions, a mechanism for expanding the curved plate-like body to which the fitting body is fixed, and a mechanism for expanding the upper and lower links provided with the fitting body. There has been proposed a method in which a fitting body is fixed to a side portion of a side plate wedge-coupled to upper and lower wedge plates, and the upper and lower wedge plates are pulled by bolts, and the fitting body is pushed using a taper screw or a gear. .

[0003]

However, in the case of using a curved plate as the fitting drive mechanism, when an external force acts to separate the upper and lower columns in the axial direction, the curved plate is bent and deformed. May come off.

[0004] The structure of a fitting drive mechanism using a link, a mechanism using a side plate wedge-bonded to a wedge plate, or a mechanism using a tapered screw or gear is complicated.

An object of the present invention is to stably and securely join upper and lower columns with a simple structure.

[0006]

According to a first aspect of the present invention, there is provided a fastening structure for a pillar for vertically fastening an upper pillar and a lower pillar, wherein the inner circumference of the upper pillar includes an upper annular groove and the inner circumference of the lower pillar. A plurality of engaging projections on the outer surface of a plurality of fitting bodies arranged side by side along the inner periphery of the upper pillar and the lower pillar, and the aligned fitting bodies are expanded to each other, and each fitting body is expanded. Is provided with an expanding tool for engaging the engaging projection of (1) with the upper annular groove of the upper column and the lower annular groove of the lower column.

According to a second aspect of the present invention, in the first aspect of the present invention, the spreader is a wedge pushed between adjacent fittings.

According to a third aspect of the present invention, in the second aspect, the wedge comprises an upper wedge and a lower wedge which are pushed up and down between adjacent fittings, and the upper wedge and the lower wedge are attracted to each other. This has a pulling bolt.

According to a fourth aspect of the present invention, in the second aspect of the present invention, the wedge is further provided on one side above or below between the adjacent fittings, and above or below the adjacent fittings. And an end plate which abuts on the other end of the end plate, and has a drawing bolt for drawing the wedge to the end plate.

According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, a stopper for supporting a fitting body is further provided on an inner surface of the lower pillar.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the spreader comprises upper and lower conical plates formed by conically winding a flat plate, and the upper and lower conical plates face their recesses. Then, the outer edges thereof are engaged with the upper end and the lower end, respectively, of the fitting bodies arranged side by side, and have pulling bolts for pulling the upper and lower conical plates toward each other and expanding them.

According to a seventh aspect of the present invention, there is provided a method of fastening a pillar using the pillar fastening structure according to any one of the first to sixth aspects, wherein the step of vertically aligning the upper pillar and the lower pillar is performed, and The step of inserting the union into the upper pillar and the lower pillar, and engaging the engaging projections of each fitting body with the upper annular groove of the upper pillar and the lower annular groove of the lower pillar, and using the expanding tool to align the fitting bodies in a row. And a step of expanding each other.

[0013]

According to the first aspect of the present invention, the following operations are provided. The engaging members arranged side by side along the inner periphery of the upper column and the lower column are expanded by a spreader, and the engaging projections of the engaging members are engaged with the upper annular groove of the upper column and the lower annular groove of the lower column. With the simple structure, the upper and lower columns can be stably and securely joined.

According to the second aspect of the invention, the following effects are obtained. The spreader is constructed simply by pushing the wedge between the adjacent fittings, and the construction is simple. The fitting body does not come off until the contact surface between the wedge and the fitting body yields, and the engaging projections of the fitting body can be stably maintained in engagement with the upper annular groove of the upper column and the lower annular groove of the lower column.

According to the third aspect of the invention, the following effects are obtained. The upper wedge and the lower wedge are drawn toward each other by the pulling bolt, so that the fitting body can be reliably expanded.

According to the fourth aspect of the invention, the following effects are obtained. The wedge and the end plate are attracted to each other by the attracting bolt, so that the fitting body can be reliably expanded.

According to the fifth aspect of the invention, the following operations are provided. Since the stopper of the fitting body is provided on the inner surface of the lower pillar, the fitting body can be placed on the stopper during the engagement process of the fitting body, and can be temporarily held securely inside the lower pillar.

According to the sixth aspect of the invention, the following operations are provided. The expansion device is configured by expanding the upper and lower conical plates, and the configuration is simple. The expansion reaction force of the upper and lower conical plates acts along the plate surface, and the buckling strength in the plate surface is strong. The engagement with the lower annular groove of the column can be stably maintained.

According to the seventh aspect of the invention, the following effects are obtained. The upper and lower pillars can be easily and stably and securely connected. The upper pillar and the lower pillar can be easily separated and disassembled by releasing the engagement projection of the fitting body from the upper annular groove of the upper pillar and the lower annular groove of the lower pillar.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a process of installing 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, FIG. 6 (A) is an overall side view, FIG. 6 (B) is a sectional view of a main part, FIG. 6 (C) is an exploded perspective view, and FIG. 7 is a perspective view showing a fastener of the first embodiment. Figures 8 show the fasteners inserted into the column,
(A) is a half sectional view, (B) is a plan view, (C) is a side view,
9A and 9B show a fastening state by the fastener, FIG. 9A is a half sectional view, FIG. 9B is a plan view, FIG. 9C is a side view, and FIG. 11 is a sectional view showing an engagement projection of the fitting body, and FIG.
(B) is an end view showing a large convex portion, (C) is an end view showing a small convex portion, FIG. 12 shows a restraining structure of a fitting body, (A) is a plan view using a magnet, and (B) is FIG. 13 is a plan view using a spring, and FIG.
FIG. 14 is a cross-sectional view using a bend of a wedge, FIG. 14B is a cross-sectional view using a spring, and FIG.
(A) is a plan view inserted into a pillar, (B) is a plan view in a fastening state, (C) is a perspective view showing a wedge, FIG. 15 is a side view showing a fastener of the third embodiment, and FIG. FIG. 8A is a side view showing a state before the expansion, FIG.
Is a side view showing an expanded state, FIG. 17 is a plan view showing a fastener of the fifth embodiment, FIG. 18 is a perspective view showing a fastener of the sixth embodiment, and FIG. 19 is a view showing the fastener of the seventh embodiment. Plan view,
20A and 20B show a state where the fastener is inserted into a pillar of the eighth embodiment, where FIG. 20A is a cross-sectional view, FIG. 20B is a plan view, FIG. FIG. 22 (B) is a plan view, FIG. 22 is a perspective view showing a conical plate, and FIG. 23 is a perspective view showing an engaged state of the conical plate and the fitting body.

(First Embodiment) (FIGS. 1 to 13) As shown in FIG. 1, a unit building 10 transports a plurality of building units 11 produced at a factory 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, as the building unit to which the present invention is applied,
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 straddling the lower end of a column 31 made of a square steel pipe 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 to a column 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 and 7) 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) (FIG. 6) As shown in FIG. 6, the fastening tool 50 includes a socket-shaped engaging portion 51 which is inserted into the inside of the column 21 and is engaged with a bolt 73 of the fastener 60 described later, and a column. An operating part 52, such as a T-shaped handle, a torque wrench, or an impact wrench, which is located outside the housing 21 to rotate the engaging part 51, and a shaft part 53 extending between the engaging part 51 and the operating part 52. Having. 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 at the center of its concave conical surface.
Provided, the outer diameter of the guide 54 is smaller than the inner diameter of the column 21,
It is set larger than half the inner diameter of the column 21.

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 73
, Or by rotating the fastening tool 50,
The bolt 73 can be easily introduced into and engaged with the engaging portion 51 at the center of the guide 54.

The fastening tool 50 only needs to apply a part of the concave conical surface of the guide 54 to the bolt 73. Therefore, when the bolt 73 is located at the center of the column 21, the outer diameter of the guide 54 is
The diameter can be reduced to half of the inner diameter of 1 to reduce the weight.

Even if the bolt 73 is displaced from the center of the column 21, a part of the concave conical surface of the guide 54
In this case, if the distance L between the bolt 73 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 is reached.

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 into and pulled out of the pillar 21.

(Fastener) (FIGS. 7 to 13) When the fastener 60 is used, 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 annular groove 28 on the inner periphery thereof, and the lower column 21 has a lower annular groove 29 on the inner periphery thereof. The upper annular groove 28 may be formed integrally with the main body 21A of the upper column 21, or may be provided in an additional ring body 21B added to the lower end of the main body 21A of the upper column 21 by welding or the like. The lower annular groove 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.

However, as shown in FIGS. 7 to 9, the fasteners 60 are provided on the outer surfaces of three fitting bodies 61 which are arranged at equal intervals along the inner periphery of the upper column 21 and the lower column 21 and are arranged side by side. And a plurality of engagement projections 61A. Engagement convex portion 61 of fitting body 61
A is an upper annular groove 28 of the upper column 21 and a lower annular groove 2 of the lower column 21.
9 can be engaged.

Each of the fasteners 60 is provided with an engaging projection 6
1A is the upper annular groove 28 of the upper pillar 21 and the lower annular groove 2 of the lower pillar 21
9 and an expanding tool 70 for expanding the mutually adjacent fitting bodies 61 to each other. The expanding device 70 is composed of three upper wedges 71 and lower wedges 72 that are pushed up and down between adjacent fitting bodies 61, and has a pulling bolt 73 that pulls the upper wedge 71 and the lower wedge 72 together. And 3
The upper wedges 71 are integrated with the boss B1, the three lower wedges 72 are integrated with the boss B2, and the bolts 73 are inserted from the center holes of the bosses B1 into the center holes of the bosses B2.
A nut 74 is screwed onto the tip.

When the fastener 60 is inserted into the column 21, the three fittings 61 are not separated separately.
In addition, it is surrounded and restrained by the breaking wire 75 with the expanding force applied thereafter. Further, a stopper 76 for supporting the fitting body 61 is provided on the inner surface of the main body 21A of the lower pillar 21 or the additional ring body 21B, and the fitting body 61 inserted into the pillar 21 is provided.
Is placed on the stopper 76 and can be temporarily held.

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.

The lower-floor building unit 11A is fixed to the foundation 12. The fitting body 61 of the fastener 60 is placed and temporarily placed on the stopper 76 inside the lower pillar 21 of the lower-floor building unit 11A (FIG. 8).

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 abutted against the lower pillar 21 of the lower floor building unit 11A.

The engaging portion 51 of the fastening tool 50 is inserted from the upper end opening of the upper column 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 The guide 5 is placed on the bolt 73 of the fastener 60.
The bolt 73 is fitted to the central engaging portion 51 of 4 and introduced.
Get engaged.

By rotating the fastening tool 50, the bolt 73 is rotated via the engaging portion 51. The spreader 70 of the fastener 60 draws the upper wedge 71 and the lower wedge 72 together with the rotation of the bolt 73, and the upper wedge 71
And the wedge surfaces 71A, 72A of the lower wedge 72 are pressed against the upper and lower wedge surfaces 62, 63 of the adjacent fittings 61, and the fittings 61 are expanded. Thereby, each fitting body 61
The upper pillar 21 and the lower pillar 2
1 is engaged with the lower annular groove 29, and as a result, the upper and lower columns 21 are fastened (FIG. 9).

The fastening portion 51 of the fastening tool 50 is
And pulls the fastening tool 50 out of the upper end opening of the upper column 21.

The annular groove 2 provided in the upper column 21 and the lower column 21
The size of the peaks and valleys of the engaging projections 61A of the fitting body 61 is preferably smaller than that of the engaging projections 8 and 29 (FIG. 11). That is,
The central radius R of the engaging portion between the engaging convex portion 61A and the annular grooves 28 and 29 is the same (the force per unit width becomes equal), and the total area of the root area a of the engaging convex portion 61A is made equal. Increasing the number of engaging projections 61A (reducing the size) in this state improves the yield of the material, increases the cross-sectional area b of the valley, and is advantageous in strength, and reduces the height c of the crest to engage. The bending deformation of the protrusion 61A is small, and the rigidity of the engagement protrusion 61A can be increased. As in this embodiment, the upper and lower annular grooves 28, 2
In the case where 9 is composed of a plurality of grooves, the space between the grooves is a convex portion, and the ridges and valleys of the plurality of engaging convex portions 61A are grooves. That is,
Even if the groove and the projection are reversed, this is included in the present invention.

In addition to the above-described wire 75, a magnet 75A provided on the opposite side of each of the fittings 61 serves as a restraining means for preventing the three fittings 61 constituting the fastener 60 from being separated apart. The inner surface of each of the fitting bodies 61 is attached by a spring 75 (FIG. 12A).
B attracts and joins each other (FIG. 12
(B)) may be adopted.

The upper wedge 71 and the lower wedge 72 of the spreader 70 are always drawn together by a pulling bolt 73.
It is desirable to always expand the fitting body 61. FIG.
13 (A) maintains the expanding force by the elastic deflection of the upper wedge 71 and the lower wedge 72, and FIG. 13 (B) illustrates the one in which a spring 77 is interposed between the nut 74 of the bolt 73 and the lower wedge 72. .

In the case of the fastener 60, the fitting 61
When the angle α formed between the wedge surfaces 62 and 63 of the fastener 60 with respect to the direction perpendicular to the central axis of the fastener 60 is within 90 degrees and is close to 90 degrees, the phase is caused by the external force F1 that separates the upper and lower columns 21 from each other. When the force F2 for reducing the diameter of the adjacent fittings 61, 61 is applied, the wedges 62, 63 and the wedges 71, 72 of the fitting 61 are determined by the force of the F2 pushing out the upper wedge 71 and the lower wedge 72. The friction force generated between the surfaces 71A and 72A becomes larger, and the upper wedge 71 and the lower wedge 7
2 can stabilize the engagement maintaining state of the fitting body 61. If the frictional force generated between the wedge surfaces 62 and 63 of the fitting body 61 and the wedge surfaces 71A and 72A of the wedges 71 and 72 is large, the pulling bolt 73 may be unnecessary.

Therefore, according to the present embodiment, the following operations are provided. Fitting bodies 61 lined up along the inner circumference of the upper pillar 21 and the lower pillar 21
Are spread by a spreader 70, and the engagement protrusion 61A of the fitting body 61 is maintained in engagement with the upper annular groove 28 and the lower annular groove 29 of the lower pillar 21 by a simple configuration. The upper and lower columns 21 can be rigidly and stably joined.

Wedges 71, 7 between adjacent fittings 61
The spreader 70 is constructed simply by pushing the 2 in, and the construction is simple. The fitting body 61 does not come off until the contact surface between the wedges 71 and 72 and the fitting body 61 yields.
Of the upper pillar 21 with the upper annular groove 28 and the lower pillar 21
Engagement with the lower annular groove 29 can be stably maintained.

The upper wedge 71 and the lower wedge 72 are drawn toward each other by a pulling bolt 73, so that the fitting body 61 can be reliably opened.

Since the stopper 76 of the fitting 61 is provided on the inner surface of the lower pillar 21, the fitting 61
Is placed on the stopper 76 and can be temporarily held securely inside the lower pillar 21.

The upper column 21 and the lower column 21 can be easily, stably and securely connected. The engaging projection 61A of the fitting body 61 is
By disengaging from the upper annular groove 28 and the lower annular groove 29 of the lower column 21, the upper column 21 and the lower column 21 can be easily separated and disassembled.

(Second Embodiment) (FIG. 14) The point that the fastener 60 of the second embodiment of FIG. 14 differs from the first embodiment is that the spreader 70 separates the three upper wedges 71 from each other, And the three lower wedges 72 are separated from each other, and the corresponding upper wedge 71 and lower wedge 72
3 to attract each other.

(Third Embodiment) (FIG. 15) The fastener 60 of the third embodiment shown in FIG. 15 is different from that of the first embodiment in that the spreader 70 has a wedge 81 adjacent to the fitting 6
1 and an end plate 82 which abuts against the lower end surfaces of the adjacent fitting bodies 61, and pulls a wedge 81 toward the end plate 82.
(Not shown). Wedge surface 6 of fitting body 61 adjacent to wedge surface 81A of wedge 81
It is pressed against 2.

According to the third embodiment, the wedge 81 and the end plate 82 are pulled toward each other by the pulling bolt 83, so that the fitting body 61 can be reliably opened.

(Fourth Embodiment) (FIG. 16) The difference between the fastener 60 of the fourth embodiment shown in FIG. 16 and the third embodiment is that the spreader 70 has a wedge 81 with a spear tip and a fitting body 61. The angle α formed by the wedge surface 62 with respect to the direction perpendicular to the center axis of the fastener 60 is 90 degrees. In this case, the pulling bolt 83 can be omitted.

Fifth Embodiment (FIG. 17) The fastener 60 of the fifth embodiment shown in FIG. 17 is different from the first and second embodiments in that the spreader 70 has three wedges 71 ( The wedge surface 71A (72A) of 72) is a V-shaped convex surface, and the wedge surface 62 (63) of the fitting body 61 is a V-shaped concave surface.

Sixth Embodiment (FIG. 18) The fastener 60 of the sixth embodiment shown in FIG. 18 is different from the first and second embodiments in that the spreader 70 has upper and lower wedges 71 and 72. Is used, and only a single wedge 91 is pushed between the adjacent fitting bodies 61.

(Seventh Embodiment) (FIG. 19) The fastener 60 of the seventh embodiment shown in FIG. 19 is different from the first and second embodiments in that three fasteners 61 are not used.
That is, two fitting bodies 61 are used.

(Eighth Embodiment) (FIGS. 20 to 23) The fastener 60 of the eighth embodiment shown in FIGS. 20 and 21 is different from that of the first embodiment in that the spreader 70 makes the flat plate 101 conical. The upper and lower conical plates 102 and 103 are wound (FIG. 22). And the upper and lower conical plates 1
In a state where the recesses 02 and 103 face the concave portions, their outer edges are engaged with the engaging grooves 104A and 104B provided at the upper end and the lower end of the fitting body 61 (FIG. 2).
3) A nut 106 is screwed onto a pulling bolt 105 inserted into a hole provided at the center of the upper and lower conical plates 102 and 103, so that the upper and lower conical plates 102 and 103 can be pulled together and expanded. , FIG. 21).

According to the eighth embodiment, the upper and lower conical plates 10
The expansion device 70 is configured by expanding the components 2 and 103, and the configuration is simple. The expansion reaction force of the upper and lower conical plates 102 and 103 acts along the plate surface, and the buckling strength in the plate surface is strong.
Can be stably engaged with the upper annular groove 28 of the upper column 21 and the lower annular groove 29 of the lower column 21. Also, the conical plates 102, 103
Engagement groove 1 at the upper end and lower end of fitting body 61 lined with the outer edge of
Since it is engaged with each of 04A and 104B, when it is inserted into pillar 21, it can be restrained so that three fitting bodies 61 do not separate apart.

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 may 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 columns of building units constituting a unit building, but can be widely applied to fastening of general columns.

[0063]

As described above, according to the present invention, the upper and lower columns can be stably and securely joined with a simple structure.

[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, (A) is an overall side view,
(B) is a sectional view of a main part, and (C) is an exploded perspective view.

FIG. 7 is a perspective view showing a fastener of the first embodiment.

FIGS. 8A and 8B show a fastener inserted into a pillar, wherein FIG. 8A is a half sectional view, FIG. 8B is a plan view, and FIG. 8C is a side view.

9A and 9B show a fastening state by a fastener, FIG. 9A is a half sectional view, FIG. 9B is a plan view, and FIG. 9C is a side view.

FIG. 10 is a side view showing a fastening reaction force acting on the fastener.

11A and 11B show an engaging projection of the fitting body, FIG. 11A is a cross-sectional view showing a fastening state with a column, FIG. 11B is an end view showing a large projection, and FIG. 11C is a small projection. FIG.

12A and 12B show a restraining structure of a fitting body, wherein FIG. 12A is a plan view using a magnet, and FIG. 12B is a plan view using a spring.

FIG. 13 shows a fastening maintaining state by the fastener,
(A) is a cross-sectional view using wedge bending, and (B) is a cross-sectional view using a spring.

FIG. 14 shows a fastener according to a second embodiment,
(A) is a plan view inserted into a pillar, (B) is a plan view in a fastening state, and (C) is a perspective view showing a wedge.

FIG. 15 is a side view showing a fastener of the third embodiment.

FIG. 16 shows a fastener according to a fourth embodiment,
(A) is a side view showing a state before expansion, and (B) is a side view showing an expansion state.

FIG. 17 is a plan view showing a fastener according to a fifth embodiment.

FIG. 18 is a perspective view showing a fastener of the sixth embodiment.

FIG. 19 is a plan view showing a fastener according to a seventh embodiment.

FIG. 20 shows a state where the fastener of the eighth embodiment has been inserted into a pillar, where (A) is a cross-sectional view and (B) is a plan view.

FIG. 21 shows a fastening state by a fastener;
(A) is a sectional view, and (B) is a plan view.

FIG. 22 is a perspective view showing a conical plate.

FIG. 23 is a perspective view showing an engaged state between the conical plate and the fitting body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Upper pillar, lower pillar 28 Upper annular groove 29 Lower annular groove 60 Fastener 61 Fitting body 61A Engagement convex part 62, 63 Wedge surface 70 Spreader 71 Upper wedge 72 Lower wedge 71A, 72A Wedge surface 73 Pulling bolt 76 Stopper 81 Wedge 82 End plate 83 Pulling bolt 91 Wedge 101 Flat plate 102, 103 Conical plate 104A, 104B Engagement groove 105 Pulling bolt

Continued on the front page F term (reference) 2E125 AA03 AB17 AC16 AG03 BB16 BB29 BD01 BE07 BF01 CA32 CA43 DA03

Claims (7)

[Claims] 1. A fastening structure for a pillar for vertically fastening an upper pillar and a lower pillar, wherein the upper pillar has an upper annular groove on the inner periphery and the lower pillar has a lower annular groove on the inner periphery of the lower pillar. A plurality of engagement projections are provided on the outer surface of the plurality of engagement bodies arranged side by side along the inner periphery of the column, and the aligned engagement bodies are expanded to each other, and the engagement projections of each engagement body are formed in an upper ring of the upper pillar. A fastening structure for a column, comprising: an expanding tool for engaging the groove and the lower annular groove of the lower column. 2. The column fastening structure according to claim 1, wherein the spreader is a wedge pushed between adjacent fittings. 3. The wedge according to claim 2, wherein the wedge comprises an upper wedge and a lower wedge which are pushed up and down between adjacent fittings, and has a pulling bolt for pulling the upper wedge and the lower wedge together. Column fastening structure. 4. An end plate, wherein the wedge is provided on one side above or below between adjacent fittings, and abuts against the other end above or below those adjacent fittings. 3. The column fastening structure according to claim 2, further comprising a drawing bolt for drawing the wedge to the end plate. 5. The column fastening structure according to claim 1, further comprising a stopper on an inner surface of said lower column for supporting a fitting body. 6. The upper end of a fitting body in which the spreader comprises upper and lower conical plates obtained by winding a flat plate into a conical shape, and the upper and lower conical plates face their recesses in a state of facing their recesses. A pulling bolt engaged with each of the lower and upper end portions and pulling the upper and lower conical plates toward each other and expanding them.
The column fastening structure according to 1. 7. A method for fastening a column using the column fastening structure according to claim 1, wherein the upper and lower columns are vertically aligned, and A step of inserting the fitting projections of the respective fitting bodies into the upper annular groove of the upper pillar and the lower annular groove of the lower pillar, and expanding the mutually aligned fitting bodies by the spreader; And a method for fastening a column comprising: