JP4709645B2 - Building foundation bundles, under-floor structures of buildings and buildings - Google Patents

Description

  The present invention relates to a building foundation bundle, a building underfloor structure, and a building.

  As a basic bundle of buildings, as described in Patent Document 1, there is one having a bundle main body standing up under the floor and a support provided on the upper end of the bundle main body to support the lower surface of the floor beam of the building. . The bundle body has a turnbuckle body, upper bolts and lower bolts are screwed onto both upper and lower ends of the turnbuckle body, the upper bolts and lower bolts are reversely threaded, and the above-described receiver is attached to the upper end of the upper bolt. And a slab seating tool is fixed to the lower end of the lower bolt.

The installer goes under the floor of the building and secures the foundation bundle supporter with screws, nails, etc. to the lower surface of the floor beam of the building. The installation level of the bundle body is determined by adjusting the length of the bundle body by rotating the turnbuckle barrel. It is intended to prevent the deflection and vibration of the floor beams after building.
JP2001-115629

  The foundation bundle of Patent Document 1 requires the installer to go under the floor at the time of installation, so that the workability is poor and the construction cost is high.

  An object of the present invention is to make it possible to install a foundation bundle standing on the floor and supporting a floor beam from above the floor.

The invention of claim 1 is fixed to a bundle main body standing up under the floor, an upper bolt that is screwed to the bundle main body and extends upward from below the floor beam, and an intermediate portion of the upper bolt closer to the bundle main body, A receiver that supports the lower surface of the floor beam as the upper bolt is rotated upward by rotation of the upper bolt, and a fixture that is attached to the upper end of the upper bolt and supports the upper surface of the floor beam. A foundation bundle of a building , wherein the upper bolt is inserted into a space between adjacent floor beams, and the receiving plate is fixed to the upper bolt, and the upper surface of the receiving plate is inserted into the upper bolt. And a lower plate of the floor beam, and includes a sliding plate extending over both adjacent floor beams, and an embossed portion is provided on the surface where the receiving plate is in sliding contact with the sliding plate .

According to a second aspect of the present invention, in the first aspect of the invention, the bundle body has a turnbuckle cylinder, and upper and lower bolts are screwed onto both upper and lower ends of the turnbuckle cylinder. They are made to have reverse screws .

According to a third aspect of the present invention, in the first or second aspect of the present invention, a tool locking portion is provided on the upper end surface of the upper bolt .

According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, the fixing device further includes a fixing plate that is inserted into the upper bolt, and a nut that is screwed to the upper bolt to back up the fixing plate. It is what I did.

The invention of claim 5, further characterized in that in the invention of claim 4, wherein the fixing plate, in which so as to be fixed to the upper surface of the floor beam by screws.

According to a sixth aspect of the present invention, in the fourth or fifth aspect of the present invention, the fixing plate further includes an engaging protrusion that engages with the space between adjacent floor beams around the insertion hole for the upper bolt. It is intended to be equipped with .

According to a seventh aspect of the invention, in the sixth aspect of the invention, the engaging projection is an annular body welded to a fixed plate .

According to an eighth aspect of the present invention, in the sixth aspect of the present invention, the engaging protrusion is a bent piece formed by notching two opposite points around the insertion hole for the upper bolt in the fixing plate. It is a thing.

According to a ninth aspect of the present invention, in the invention according to any one of the first to eighth aspects , a slab seating tool is fixed to the lower end portion of the lower bolt .

The invention of claim 10 is an underfloor structure of a building using the foundation bundle according to any one of claims 1 to 9 .

The invention of claim 11 is a building using the foundation bundle according to any one of claims 1 to 9 .

(Claim 1)
(a) a base bundle is fixed to a bundle body standing up below the floor, an upper bolt that is screwed to the bundle body and extends upward from below the floor beam, and an intermediate portion of the upper bolt closer to the bundle body; A receiver that supports the lower surface of the floor beam as the upper bolt is rotated upward by rotation of the upper bolt, and a fixture that is attached to the upper end of the upper bolt and supports the upper surface of the floor beam. I did it. Therefore, by rotating the upper bolt that extends upward from below the floor beam after the bundle main body is erected from the floor, the height of the support fixed to the intermediate portion of the upper bolt is adjusted. Move it to the bottom surface of the floor beam and adjust the floor beam installation level. After that, by attaching a fixture to the upper end of the upper bolt, the floor beam can be clamped from above and below by the receiver and the fixture, and the floor beam can be fixedly supported at a certain installation level. Thereby, the foundation bundle standing up under the floor and supporting the floor beam can be installed from the floor, so that the construction workability can be improved and the construction cost can be reduced.

(b) The upper bolts are inserted into the space between adjacent floor beams so that the upper bolts are stably connected to the adjacent floor beams and the floor beams are stably supported at a certain installation level. it can.
(c) a receiving plate fixed to the upper bolt in a middle portion of the upper bolt, and a sliding plate inserted through the upper bolt and interposed between the upper surface of the receiving plate and the lower surface of the floor beam It was made to become. Therefore, when the upper bolt is rotated from the floor, the receiving plate fixed to the upper bolt is slid with respect to the sliding plate to facilitate rotation, and the height adjustment of the receiving plate is facilitated.
(d) By providing an embossed portion on one of the surfaces of the receiving plate and the sliding plate that are in sliding contact with each other in (c) above, the receiving plate is further easily slid with respect to the sliding plate, and the height of the receiving plate is further adjusted. It becomes easy.

(Claim 2 )
( e ) The bundle body has a turnbuckle barrel, and upper and lower bolts are screwed onto both upper and lower ends of the turnbuckle barrel so that the upper and lower bolts are reverse screws. Therefore, in the unlikely event of the uneven settlement after the construction of the unit building, the installation level of the floor beam can be corrected by adjusting the length of the bundle body by rotating the turnbuckle cylinder from under the floor.

(Claim 3 )
( f ) By providing a tool locking portion on the upper end surface of the upper bolt, the upper bolt can be easily and reliably rotated from the floor.

(Claim 4 )
( g ) A fixing member attached to the upper end of the upper bolt can be simply configured by a fixing plate inserted through the upper bolt and a nut that is screwed onto the upper bolt to back up the fixing plate.

(Claim 5)
(h) The fixing plate (g) described above is fixed to the upper surface of the floor beam with screws. Therefore, it is possible to prevent the upper bolts from wobbling within the interval between the adjacent floor beams, and as a result, the standing state of the bundle main body can be stabilized and strengthened.
(Claims 6-8 )
( i ) The fixing plate of ( g ) described above is provided with an engaging protrusion that engages with the space between the floor beams of adjacent building units around the insertion hole for the upper bolt, so that the upper bolt is It is possible to prevent wobbling within the space between adjacent floor beams, and thus to stabilize and erect the bundle body.

(Claim 9 )
( j ) By fixing the slab seating tool to the lower end of the lower bolt, the bundle body can be stably erected under the floor.

(Claim 10 )
(K) in the basic flux is used under the floor structure of a building, can be realized above (a) ~ (j).

(Claim 11 )
( l ) The above-mentioned (a) to ( j ) can be realized for the foundation bundle used in the building.

1 is a plan view showing adjacent building units installed so as to form a unit building , FIG. 2 is a perspective view showing the building units, FIG. 3 is a cross-sectional view showing the floor structure of the building units, and FIG. FIG. 5 is a plan view of FIG. 4, FIG. 6 is a perspective view showing an upper bolt and a receiving plate, FIG. 7 is a construction process diagram showing the installation procedure of the foundation bundle, and FIG. 8 is a modification of the foundation bundle. 9 is a front view showing the basic bundle of Reference Example 1 , FIG. 10 is a plan view of FIG. 9, FIG. 11 is a front view showing the basic bundle of Reference Example 2 , and FIG. 12 is a plan view of FIG. It is.

As shown in FIG. 1, the unit building 10 is constructed by installing a steel foundation 11 or the like on a concrete slab 1 (FIG. 4) and installing a plurality of building units 20 on the steel foundation 11. The foundation 11 may be a normal RC foundation instead of a steel foundation.

  The building unit 20 is a frame structure in which columns 21, floor beams 22 and ceiling beams 23 are connected in a box shape. As shown in FIGS. 2 and 3, the building unit 20 according to the present embodiment spans a steel beam floor girder 22 between lower ends of four square steel pipe columns 21, and forms between the upper ends of the columns 21. It is constructed by spanning steel ceiling beams 23. A plurality of floor beams 22A are supported on the opposite long side floor beams 22 and a plurality of floor joists 22B are supported on the floor beams 22A, and a floor plate is disposed on the floor joists 22B. 22C is pasted. A plurality of ceiling joists 23A are supported on the opposing long-side ceiling girder 23, and a ceiling plate 23B is attached below the ceiling joists 23A.

  In order to prevent the bending and vibration of the floor beams 22 of each building unit 20 after the unit building 10 is constructed, the middle portion of the floor beams 22 of each building unit 20 is supported by a steel foundation bundle 30. The foundation bundle 30 is installed on the concrete slab 1 and configured as follows.

  As shown in FIGS. 4 and 5, the foundation bundle 30 has a bundle body 31 </ b> A that is erected on the concrete slab 1. The bundle body 31 has a steel turnbuckle body 31A, and upper bolts 32 and lower bolts 33 are screwed to both upper and lower ends of the turnbuckle body 31A, and the upper bolts 32 and the lower bolts 33 are reversely threaded. .

  The upper bolt 32 is screwed into the turnbuckle body 31A as the bundle main body 31, and is installed after the bundle main body 31 is erected, and is disposed within an interval between the floor beams 22 of the adjacent building units 20 and 20. A slab seating tool 34 such as a steel disk is fixed to the lower end of the lower bolt 33 by welding or caulking, and the slab seating tool 34 is fixed to the concrete slab 1 with a concrete screw 34A or an adhesive.

  The foundation bundle 30 is fixed to an intermediate portion of the upper bolt 32 near the turnbuckle body 31A, and receives the lower flange of the floor girder 22 in accordance with the upward screwing by the rotation operation of the upper bolt 32 and supports the same. 35. A tool locking portion 32A such as a hexagonal cut hole that can be locked by a hexagon wrench or the like is provided on the top upper end surface of the upper bolt 32.

  The receiving member 35 is a steel plate or other receiving plate 36 fixed to the upper bolt 32 by welding or caulking or the like, and is inserted into the upper bolt 32 so as to be rotatable relative to the upper surface of the receiving plate 36 and the lower flange of the floor girder 22. And a sliding plate 37 such as a steel disk interposed between the lower surface of the steel plate. As shown in FIG. 6, hemispherical embossed portions 36A are provided at a plurality of circumferential positions on the upper surface of the receiving plate 36 in one of the surfaces of the receiving plate 36 and the sliding plate 37 that are in sliding contact with each other.

  The foundation bundle 30 has a fixture 38 that is attached to the upper end of the upper bolt 32 and abuts against the upper surface of the upper flange of the floor beam 22 to support it. The fixing tool 38 includes a fixing plate 39 such as a steel square plate inserted through the upper bolt 32, and a nut 40 that is screwed onto the upper bolt 32 to back up the fixing plate 39. The fixing plate 39 is fastened and fixed to the upper flange of the floor beam 22 by screws 39A or the like.

Hereinafter, the installation procedure of the foundation bundle 30 will be described (FIG. 7).
(1) The slab sitting tool 34 provided on the lower bolt 33 of the bundle body 31 is fixed to the concrete slab 1 (FIG. 7A).

  (2) In the unit building 10, corner portions of adjacent building units 20 are installed on the steel foundation 11. The upper bolts 32 screwed to the bundle main body 31 of the above (1) are disposed within the interval formed by the middle part of the floor beams 22 of the building unit 20 and extend upward from below the floor beams 22 ( FIG. 7 (B)).

  (3) A hexagon wrench or the like is locked to the tool locking portion 32A of the upper bolt 32, the upper bolt 32 is rotated from the floor, and the height of the support 35 fixed to the intermediate portion of the upper bolt 32 is adjusted. The installation level of the floor girder 22 is adjusted by moving it up to the lower surface of the floor girder 22. The receiving plate 36 of the receiving device 35 hits the lower surface of the floor beam 22 via the sliding plate 37 (FIG. 7C).

  (4) The fixing tool 38 (fixing plate 39 and nut 40) is attached to the upper end of the upper bolt 32 (FIG. 7D). The floor girder 22 is sandwiched from above and below by the receiver 35 and the fixture 38, and the floor girder 22 is fixedly supported at a fixed installation level.

  When it is necessary to adjust the installation level of the floor girder 22 after the unit building 10 is constructed, the turnbuckle body 31A is rotated by an operator who goes under the floor to rotate the bundle body 31 (upper bolt 32, lower bolt 33). The installation level of the floor girder 22 can be corrected by adjusting the length.

According to the present embodiment, the following operational effects can be obtained.
(a) A base bundle 30 is erected under the floor, and an upper bolt 32 that is screwed to the bundle main body 31 and is disposed within an interval between the floor beams 22 of adjacent building units 20. The upper bolt 32 is fixed to an intermediate portion of the upper bolt 32 near the bundle main body 31 and supports the lower surface of the floor beam 22 as the upper bolt 32 rotates upwardly. A fixing tool 38 that is attached and supports the upper surface of the floor girder 22 is provided. Accordingly, the building units 20 adjacent to each other after the bundle main body 31 is erected are installed, and the upper bolts 32 that are arranged within the space between the building units 20 and are stably connected to the floor beams 22 are installed on the floor. , The support 35 fixed to the intermediate portion of the upper bolt 32 is moved up so as to adjust the height and applied to the lower surface of the floor beam 22 to adjust the installation level of the floor beam 22. Thereafter, by attaching a fixture 38 to the upper end portion of the upper bolt 32, the floor girder 22 is sandwiched from above and below by the receiver 35 and the fixture 38, and the floor girder 22 is stably and fixed at a certain installation level. Can be supported. Thereby, the foundation bundle 30 which stands up under the floor and supports the floor beam 22 can be installed from the floor, so that the workability can be improved and the construction cost can be reduced.

  (b) The bundle body 31 has a turnbuckle body 31A, and upper bolts 32 and lower bolts 33 are screwed onto both upper and lower ends of the turnbuckle body 31A so that the upper bolts 32 and the lower bolts 33 are reverse screws. I made it. Accordingly, when the unit building 10 is constructed, the installation level of the floor beam 22 may be corrected by adjusting the length of the bundle body 31 by rotating the turnbuckle body 31A from the bottom of the floor in the unlikely event of settlement. it can.

  (c) By providing the tool locking portion 32A on the upper end surface of the upper bolt 32, the upper bolt 32 can be simply and reliably rotated from the floor.

  (d) The fixture 38 attached to the upper end of the upper bolt 32 is simplified by the fixing plate 39 inserted through the upper bolt 32 and the nut 40 screwed onto the upper bolt 32 to back up the fixing plate 39. Can be configured.

  (e) A receiving plate 36 fixed to the upper bolt 32 and a receiving plate 35 fixed to an intermediate portion of the upper bolt 32; and a space between the upper surface of the receiving plate 36 and the lower surface of the floor beam 22 through the upper bolt 32. And a sliding plate 37 interposed between the two. Therefore, when the upper bolt 32 is rotated from the floor, the receiving plate 36 fixed to the upper bolt 32 is slid with respect to the sliding plate 37 to facilitate rotation, and the height adjustment of the receiving plate 36 is facilitated.

  (f) Since the embossed portion 36A is provided on one of the surfaces of the receiving plate 36 and the sliding plate 37 that are in sliding contact with each other, the receiving plate 36 is further easily slid with respect to the sliding plate 37. The height adjustment becomes easier.

  (g) By fixing the slab seating tool 34 to the lower end portion of the lower bolt 33, the bundle body 31 can be stably erected under the floor.

  (h) With respect to the foundation bundle 30 used for the underfloor structure of the unit building 10, the above-described (a) to (g) can be realized.

  (i) With respect to the foundation bundle 30 used for the unit building 10, the above-described (a) to (g) can be realized.

  In the modified example of FIG. 8, the fixing plate 39 of the fixture 38 attached to the upper end of the upper bolt 32 is placed around the insertion hole 51 for the upper bolt 32 and the floor beams of the adjacent building units 20, 20. This is because the engaging protrusions 52 that engage with each other at intervals formed by the two members 22 are provided. The engaging protrusion 52 can be formed of an annular body that is welded around the insertion hole 51 on the lower surface of the fixed plate 39, and is bent by notching two opposite points around the insertion hole 51 of the fixed plate 39. It can be configured by a piece or the like. The engaging protrusion 52 of the fixing plate 39 inserted through the upper bolt 32 and placed on the upper surface of the adjacent floor girder 22 is formed between the web outer surface of one floor girder 22 and the web outer surface of the other floor girder 22. Relative to both. According to this, it is possible to prevent the upper bolt 32 from wobbling within the space between the adjacent floor beams 22, 22, and as a result, the standing state of the bundle main body 31 can be made stable and strong.

( Reference Example 1 )
The reference example 1 in FIGS. 9 and 10 is not limited to the adjacent floor beams 22 of the unit building 10 by the same foundation bundle 30 as in the above-described embodiment, but is a single steel floor beam 101 of a general building or unit building 10. Is supported at a certain installation level.

The base bundle 30 is configured in substantially the same manner as in the above embodiment , and includes a bundle body 31, an upper bolt 32, a lower bolt 33, a slab seating tool 34, a receiving tool 35, a receiving plate 36, a sliding plate 37, and a fixing tool 38. The fixing plate 39 and the nut 40 are provided as follows. Note that the receiving member 35, the receiving plate 36, the sliding plate 37, and the fixing plate 39 are set to sizes that match the flange width of the floor beam 101.

  (1) The slab seating tool 34 provided on the lower bolt 33 of the bundle body 31 is fixed to the concrete slab 1.

  (2) The floor beam 101 of the building is installed, and the upper bolt 32 screwed to the bundle body 31 of (1) described above is inserted into the loose holes 102 of the upper and lower flanges of the floor beam 101.

  (3) A hexagon wrench or the like is locked to the tool locking portion 32A of the upper bolt 32, the upper bolt 32 is rotated from the floor, and the height of the support 35 fixed to the intermediate portion of the upper bolt 32 is adjusted. The installation level of the floor beam 101 is adjusted by moving it up and touching the lower surface of the lower flange of the floor beam 101. The receiving plate 36 of the receiving device 35 hits the lower surface of the lower flange of the floor beam 101 through the sliding plate 37.

  (4) Attach the fixture 38 (fixing plate 39 and nut 40) to the upper end of the upper bolt 32. The floor beam 101 is sandwiched from above and below by the receiver 35 and the fixture 38, and the floor beam 101 is fixedly supported at a certain installation level. The fixing plate 39 is fastened and fixed to the upper flange of the floor beam 101 by screws 39A or the like.

  When it is necessary to adjust the installation level of the floor beam 101 after the building is constructed, the turnbuckle body 31A is rotated by an operator who goes under the floor, and the length of the bundle body 31 (upper bolt 32, lower bolt 33). By adjusting, the installation level of the floor beam 101 can be corrected.

By being inserted loosely hole 102 of the upper bolt 32 floor beams 101, the upper bolt 32 stably connected to the floor beam 101, the floor beams 101 can be stably supported at a constant installation level.

If the fixing plate 39 includes an engaging protrusion that engages with the loose hole 102 of the floor beam 101 around the insertion hole for the upper bolt 32, the upper bolt 32 is disposed in the loose hole 102 of the floor beam 101. As a result, it is possible to prevent the wobbling of the bundle body 31 and to stabilize and erect the bundle body 31.

( Reference Example 2 )
The reference example 2 of FIGS. 11 and 12 is not limited to the adjacent floor beams 22 of the unit building 10 by the same foundation bundle 30 as in the above-described embodiment . The same) is supported at a certain installation level.

The base bundle 30 is configured in substantially the same manner as in the above embodiment , and includes a bundle body 31, an upper bolt 32, a lower bolt 33, a slab seating tool 34, a receiving tool 35, a receiving plate 36, a sliding plate 37, and a fixing tool 38. The fixing plate 39 and the nut 40 are provided as follows. The receiving member 35, the receiving plate 36, the sliding plate 37, and the fixing plate 39 are sized to fit the width of the wooden base 201.

  (1) The slab seating tool 34 provided on the lower bolt 33 of the bundle body 31 is fixed to the concrete slab 1.

  (2) The wooden base 201 of the building is installed, and the upper bolt 32 screwed into the bundle body 31 of (1) is inserted into the loose hole 202 of the wooden base 201.

  (3) A hexagon wrench or the like is locked to the tool locking portion 32A of the upper bolt 32, the upper bolt 32 is rotated from the floor, and the height of the support 35 fixed to the intermediate portion of the upper bolt 32 is adjusted. The installation level of the wooden base 201 is adjusted by touching the lower surface of the wooden base 201. The receiving plate 36 of the receiving device 35 hits the lower surface of the wooden base 201 through the sliding plate 37.

  (4) Attach the fixture 38 (fixing plate 39 and nut 40) to the upper end of the upper bolt 32. A wooden base 201 is sandwiched from above and below by the receiver 35 and the fixture 38, and the wooden base 201 is fixedly supported at a certain installation level.

  When it is necessary to adjust the installation level of the wooden base 201 after the building is constructed, the turnbuckle body 31A is rotated by an operator who goes under the floor, and the length of the bundle body 31 (upper bolt 32, lower bolt 33). By adjusting the setting level, the installation level of the wooden base 201 can be corrected.

By the upper bolt 32 is inserted loosely hole 202 of the wooden base 201, the upper bolt 32 stably connected to the wooden base 201 can be supported stably wooden foundation 201 at a constant installation level.

If the fixing plate 39 includes an engaging protrusion that engages with the loose hole 202 of the wooden base 201 around the insertion hole for the upper bolt 32, the upper bolt 32 is disposed in the loose hole 202 of the wooden base 201. As a result, it is possible to prevent the wobbling of the bundle body 31 and to stabilize and erect the bundle body 31.

  The embodiment of the present invention has been described with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. Included in the invention.

FIG. 1 is a plan view showing adjacent building units installed so as to constitute a unit building. FIG. 2 is a perspective view showing the building unit. FIG. 3 is a sectional view showing the floor structure of the building unit. FIG. 4 is a front view showing the foundation bundle. FIG. 5 is a plan view of FIG. FIG. 6 is a perspective view showing the upper bolt and the receiving plate. FIG. 7 is a construction process diagram showing the installation procedure of the foundation bundle. FIG. 8 is a front view showing a modification of the foundation bundle. FIG. 9 is a front view showing the foundation bundle of Reference Example 1. FIG. FIG. 10 is a plan view of FIG. FIG. 11 is a front view showing a foundation bundle of Reference Example 2 . FIG. 12 is a plan view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Unit building 20 Building unit 22 Floor girder 30 Foundation bundle 31 Bundle body 31A Turnbuckle trunk 32 Upper bolt 32A Tool latching part 33 Lower bolt 34 Slab seat 35 Fixed plate
39A Screw 40 Nut 51 Insertion hole 52 Engaging protrusion

Claims (11)

A bundle body standing under the floor;
An upper bolt that is screwed to the bundle body and extends upward from below the floor beam;
A support that is fixed to the middle portion of the upper bolt near the bundle body and supports the lower surface of the floor beam in accordance with the upward screwing by the rotation operation of the upper bolt;
A foundation bundle of a building having a fixture attached to the upper end of the upper bolt and supporting the upper surface of the floor beam ,
The upper bolt is inserted into the space between adjacent floor beams,
The receiving device is composed of a receiving plate fixed to the upper bolt, and a sliding plate that is inserted into the upper bolt and interposed between the upper surface of the receiving plate and the lower surface of the floor beam, and extends over both adjacent floor beams. A building foundation bundle with an embossed part on the surface where the backing plate slides on the sliding plate . 2. The building foundation bundle according to claim 1 , wherein the bundle body has a turnbuckle body, upper bolts and lower bolts are screwed onto both upper and lower ends of the turnbuckle body, and the upper bolts and the lower bolts are mutually reverse screws. . The building foundation bundle of Claim 1 or 2 provided with the tool latching | locking part in the upper end surface of the said upper volt | bolt. The building foundation bundle according to any one of claims 1 to 3 , wherein the fixing member includes a fixing plate inserted into the upper bolt and a nut screwed onto the upper bolt to back up the fixing plate. The building foundation bundle according to claim 4, wherein the fixing plate is fixed to the upper surface of the floor beam by screws. The building foundation bundle according to claim 4 or 5 , wherein the fixing plate includes an engaging protrusion that engages with an interval between adjacent floor beams around an insertion hole for the upper bolt. The building foundation bundle according to claim 6, wherein the engaging protrusion is an annular body welded to a fixed plate. The building foundation bundle according to claim 6, wherein the engaging protrusion is a bent piece formed by notching two opposing points around the insertion hole for the upper bolt in the fixing plate. The building foundation bundle in any one of Claims 1-8 formed by fixing a slab seating tool to the lower end part of the said lower volt | bolt. Underfloor structure of a building using the basic bundle according to any one of claims 1-9. Building using basic bundle according to any one of claims 1-9.

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