Wooden building construction methods

Abstract

To provide a wooden building construction method capable of preventing the rising of pillars from the foundation or lower cross members while preventing degradation of the design.SOLUTION: A wooden building construction method comprises a column base bolt arrangement step for arranging multiple column base bolts 51 corresponding to respective columns 111 in a foundation 90 so as to protrude upward from an upper surface 91 of the foundation 90, a column connection body formation step for forming a column connection body 110 to which each of the columns 111 is connected via a connection member and which has a lower insertion part 115 opening in a lower end surface of each of the columns 111 and extending vertically, a column base bolt insertion step for lowering the column connection body 110 to insert the column base bolt 51 into the lower insertion part 115, and a column base bolt fastening step for fastening the column base bolt 51 and the column 111, thereby connecting the column connection body 110 to the foundation 90.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to a construction method for wooden buildings. [Background technology]

[0002] Multi-story pagodas, such as three-story and five-story pagodas, are among Japan's traditional wooden buildings. While it is said that no multi-story pagodas have ever collapsed due to earthquakes, there are cases where they have collapsed due to strong wind pressure, such as that from a typhoon. When subjected to strong wind pressure, the pillars of each floor of a multi-story pagoda are lifted away from the foundation stones and cross members that support the base of the pillars. If the pillars on the first floor are lifted above a certain height, the multi-story pagoda will fall over and be completely destroyed.

[0003] Non-Patent Document 1 discloses a five-story pagoda in which steel tie rods are additionally installed to connect the beams on the top floor to the foundation in order to prevent the columns on each floor from lifting up from the foundation and cross members. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] Taisei Corporation website, [Searched on July 17, 2023], Internet<URL:https: / / www.taisei-techsolu.jp / solution / temple / hounenji_gojyunotou1.html > Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the case of the technology described in Non-Patent Document 1, the tie rods made of steel bars appear inside each layer, which causes a problem of impairing the design. This problem is not limited to multi-story towers, but occurs in the same way in any structure that prevents columns from lifting up from the foundation or from the cross members. [Means for solving the problem]

[0006] Various aspects of the construction method for wooden buildings to solve the above problems will be described. [Aspect 1] A wooden building construction method comprising: a plurality of wooden pillars; foundations or wooden lower cross members supporting the lower end surfaces of the pillars; and connecting members connecting the pillars; wherein each of the pillars, the foundations or the lower cross members, and the connecting members constitute a story; a column base bolt placement step of placing a plurality of column base bolts corresponding to each of the columns on the foundation or the lower cross member so as to protrude upward from an upper surface of the foundation or the lower cross member; a column connector forming process for forming a column connector in which each of the columns is connected via the connecting member, the column connector having an insertion portion that opens at the lower end surface of each of the columns and extends in the vertical direction; a column base bolt insertion process in which the column connector is lowered and the column base bolt is inserted into the insertion portion; and a column base bolt tightening step of fastening the column base bolt to the column to connect the column connector to the foundation or the lower cross member. Construction method of wooden buildings.

[0007] According to this construction method, in the column base bolt placement step, multiple column base bolts corresponding to each column are placed on the foundation or lower cross member so as to protrude upward from the top surface of the foundation or lower cross member. In the column connector formation step, the columns are connected via connecting members to form a column connector having insertion portions that open on the lower end surfaces of the columns and extend in the vertical direction. In the column base bolt insertion step, the column connector is lowered to insert the column base bolts into the insertion portions. In the column base bolt tightening step, the column base bolts are tightened to the columns, thereby connecting the column connector to the foundation or lower cross member. This makes it easy to build a wooden building in which the legs of multiple columns are connected to the foundation or lower cross member via column base bolts that extend in the vertical direction.

[0008] Furthermore, in wooden buildings constructed using this method, the uplift force acting on the base of the column is transmitted to the lower cross member or foundation via the column base bolts. In other words, by placing column base bolts at the base of the column, the column is able to withstand not only vertical compressive forces but also vertical tensile forces.

[0009] Furthermore, the column base bolts are inserted into the column bases, so they are not visible on the design surface, preventing the column base bolts from damaging the design of the wooden building.

[0010] [Aspect 2] The wooden building comprises multiple stories, a column capital bolt arranging step of arranging a column capital bolt on each of the columns so that the column bolt protrudes upward from the upper end surface of the column constituting the layer; an upper beam connector forming process for forming an upper beam connector that is configured by connecting a plurality of wooden upper beams and has a through-hole that penetrates the upper beams; a lower beam connector forming process for forming a lower beam connector configured by connecting a plurality of the lower beams and disposed above the upper beam connector; a column head bolt insertion step of lowering the upper cross-member connector to insert the column head bolt into the penetration portion; a beam connector forming step of connecting the upper beam connector and the lower beam connector via beam bolts extending in the vertical direction to form a beam connector before or after the column head bolt insertion step; a column head bolt tightening step for fastening the column head bolt to the upper cross member to connect the cross member connector to the column connector, In each of the layers, the column base bolt arrangement process, the column connector formation process, the column base bolt insertion process, the column base bolt tightening process, the column head bolt arrangement process, the upper cross member connector formation process, the lower cross member connector formation process, the column head bolt insertion process, the cross member connector formation process, and the column head bolt tightening process are performed. A method for constructing a wooden building according to aspect 1.

[0011] According to this construction method, in the column head bolt placement step, a column head bolt is placed on each column so as to protrude upward from the upper end face of the column constituting the corresponding story. In the upper beam connector formation step, a plurality of wooden upper beams are connected to form an upper beam connector having a through-hole penetrating the upper beams. In the lower beam connector formation step, a plurality of lower beams are connected to form a lower beam connector arranged above the upper beam connector. In the column head bolt insertion step, the beam connector is lowered and the column head bolt is inserted through the through-hole. In the beam connector formation step, the upper beam connector and the lower beam connector are connected via beam bolts extending in the vertical direction to form a beam connector. In the column head bolt tightening step, the column head bolt is tightened to the upper beam, thereby connecting the beam connector to the column connector. Furthermore, in each story of the wooden building, the following steps are performed: a column base bolt placement step, a column connector formation step, a column base bolt insertion step, a column base bolt tightening step, a column head bolt placement step, an upper cross member connector formation step, a lower cross member connector formation step, a column head bolt insertion step, a cross member connector formation step, and a column head bolt tightening step. This makes it easy to erect a wooden building with multiple stories in which the bases of multiple columns and the foundation or lower cross members are connected via column base bolts extending in the vertical direction, and the cross member connectors and the heads of multiple columns are connected via column head bolts extending in the vertical direction.

[0012] In wooden buildings constructed using this method, gravity and uplift forces are transmitted in the following order from the second floor onwards: lower beam connectors, upper beam connectors, columns, and lower beam connectors. In the first floor, gravity and uplift forces are transmitted in the following order: lower beam connectors, upper beam connectors, columns, and foundations. By placing column head bolts and column base bolts at the head and base of the columns, respectively, the columns are able to withstand not only vertical compressive forces but also vertical tensile forces.

[0013] In addition, by placing a cross member bolt between the upper cross member connector and the lower cross member connector arranged above the upper cross member connector, the axial force of the column can be transmitted from the column in the layer directly above to the column in that layer.

[0014] Furthermore, the column base bolts and column head bolts are inserted into the base and head of the column, respectively. Therefore, these bolts are not visible on the design surface, which prevents the bolts from damaging the design of the wooden building.

[0015] [Aspect 3] The wooden building is a multi-story tower. A construction method for a wooden building according to aspect 2.

[0016] This construction method effectively prevents the collapse of multi-story towers due to strong winds such as typhoons, while preventing the design of the towers from being damaged. [Aspect 4] In the column base bolt tightening process, a washer and a nut are attached to the upper end of the column base bolt, which is exposed inside a countersunk hole portion that opens on the outer surface of the column and communicates with the insertion portion, thereby tightening the column base bolt to the column. A construction method for a wooden building according to any one of aspects 1 to 3.

[0017] According to this construction method, a washer and nut can be attached to the upper end of the column base bolt through the countersunk groove, making it easy to fasten the column base bolt to the column. Also, because only the upper end of the column base bolt is exposed inside the countersunk groove, it is possible to further prevent the column base bolt from damaging the design of the wooden building. [Effects of the Invention]

[0018] According to the present invention, it is possible to easily erect a wooden building that can prevent columns from lifting up from the foundation or lower cross members while preventing damage to the design. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a perspective view showing the overall framework structure of a three-story tower in one embodiment. [Figure 2] FIG. 2(a) is a perspective view of a foundation in which column base bolts are arranged, and FIG. 2(b) is a plan view showing four column base bolts corresponding to one column. [Figure 3] FIG. 3 is a perspective view showing the first layer assembly. [Figure 4] FIG. 4 is a perspective view showing a two-layer assembly. [Figure 5] FIG. 5 is a perspective view showing a three-layer assembly. [Figure 6] FIG. 6 is an exploded perspective view of the column connector, the bracing connector, and the cross member connector that constitute the first-story assembly. [Figure 7] FIG. 7 is a partial plan view of the column connector of FIG. [Figure 8] FIG. 8 is a partial plan view of the cross member connector of FIG. [Figure 9] 9 is a partial side view of the braided assembly of FIG. 6. FIG. [Figure 10] FIG. 10 is a cross-sectional view showing the connection structure between the base of the column on the first floor and the foundation. [Figure 11] FIG. 11 is a cross-sectional view taken along line 11-11 in FIG. 13, showing the connection structure between the head of the column of the first story and the upper cross member. [Figure 12] FIG. 12 is a cross-sectional view taken along line 12-12 in FIG. 13, showing the connection structure between the legs of the columns on the second floor and the lower cross members. [Figure 13] FIG. 13 is a diagram corresponding to FIG. 8 and is a partial plan view showing the arrangement of the bolts. [Figure 14] FIG. 14 is a view corresponding to FIG. 11 and is a cross-sectional view showing the connection structure between the head of the column of the first story and the upper horizontal member in the modified example. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, with reference to Figs. 1 to 13, an embodiment in which the construction method for a wooden building is embodied as a construction method for a three-story wooden pagoda (hereinafter simply referred to as a tower) will be described. As shown in Figure 1, the tower comprises three layers (first, second, and third layers) consisting of a first layer assembly 100, a second layer assembly 200, and a third layer assembly 300. Each layer has four sides.

[0021] In the following description, the sides approaching and away from the center of the tower may be referred to as the inside and outside, respectively. Next, the assemblies 100, 200, and 300 of each layer will be described in detail.

[0022] <First layer assembly 100> As shown in FIGS. 3 and 6, the first story assembly 100 includes a column connector 110, a bracing connector 160, and a cross member connector 150.

[0023] (Column connection body 110) As shown in Figures 3, 6, and 7, the pillar connecting body 110 comprises a plurality of wooden pillars 111 (16 in this embodiment) erected on the upper surface of the foundation 90, and connecting members 120 that connect the pillars 111 together.

[0024] The 16 pillars 111 consist of 12 side pillars 112 and four Shiten pillars 113, and are arranged in a grid pattern in a plan view. Four side pillars 112 are provided on each side of the first floor. The four Shiten pillars 113 are surrounded by the 12 side pillars 112.

[0025] Wooden bases 121 that connect the pillars 111 are provided on the legs 114 of the pillars 111. The bases 121 are provided between adjacent side pillars 112 and between adjacent four pillars 113.

[0026] The connecting members 120 include cross members provided between adjacent side columns 112, between adjacent four-tiered columns 113, and between adjacent side columns 112 and four-tiered columns 113. The connecting members 120 are inserted through holes that penetrate the columns 111, or are inserted into holes formed on the outer surfaces of the columns 111.

[0027] As shown in Fig. 10, the leg 114 of the pillar 111 is provided with a lower insertion portion 115 that opens at the lower end surface of the pillar 111 and extends in the vertical direction. The lower insertion portion 115 is an elongated hole with a circular cross section. In this embodiment, one pillar 111 is provided with four lower insertion portions 115. The lower insertion portions 115 are located between the central axis and the outer surface of the pillar 111, and are provided at 90-degree intervals around the central axis.

[0028] A lower seat trench 116 is formed in the leg 114 of the pillar 111. The lower seat trench 116 opens to the outer surface of the pillar 111 and communicates with the lower insertion part 115. The lower seat trench 116 has an internal space in a substantially rectangular parallelepiped shape and communicates with the upper end of the lower insertion part 115.

[0029] As shown in FIGS. 7 and 11, a head portion 117 of the pillar 111 is provided with an upper insertion portion 118 that opens at the upper end surface of the pillar 111 and extends in the vertical direction. The upper insertion portions 118 are elongated holes with a circular cross section. In this embodiment, four or two upper insertion portions 118 are provided on one pillar 111. The upper insertion portions 118 are located between the central axis and the outer surface of the pillar 111, and are provided at 90-degree or 180-degree intervals around the central axis.

[0030] 11 , the pillar 111 is formed with an upper seat trench 119 that opens to the outer surface of the pillar 111 and communicates with the upper insertion part 118. The upper seat trench 119 has a substantially rectangular parallelepiped internal space and communicates with the lower end of the upper insertion part 118.

[0031] The lower portions of the column capital bolts 61, 62, which extend in the vertical direction, are inserted into the upper insertion portion 118. The upper portions of the column capital bolts 61, 62 protrude upward from the upper end surface of the column 111. The lower ends of the column capital bolts 61, 62 are exposed inside the upper trench washer portion 119. A washer 71 and a nut 72 are attached to the lower ends of the column capital bolts 61, 62.

[0032] Although not shown in the drawings, the upper seat trench 119 is filled with wood. (Basic 90) As shown in FIGS. 2(a) and 10, the foundation 90 is a concrete structure and has a flat upper surface 91.

[0033] The lower parts of a plurality of column base bolts 51, so-called anchor bolts, extending in the vertical direction are buried in the foundation 90. The upper parts of the column base bolts 51 protrude upward from the top surface 91.

[0034] As shown in FIG. 2(b), in this embodiment, four column base bolts 51 are provided corresponding to four lower insertion portions 115 provided on the leg portion 114 of the column 111. As shown in Figure 10, the upper part of the column base bolt 51 is inserted into the lower insertion part 115. The upper end of the column base bolt 51 is exposed inside the lower trench washer part 116. A washer 71 and a nut 72 are attached to the upper end of the column base bolt 51. In this way, the leg 114 of the column 111 and the foundation 90 are connected via the column base bolt 51.

[0035] Although not shown in the drawings, the lower seat trench 116 is subjected to wood filling treatment. (Place connection body 160) As shown in FIGS. 6, 9, and 11, a braid connector 160 is disposed above the side pillar 112 of the pillar 111.

[0036] The braid connecting body 160 comprises a braid main body 161 and a base wheel 165 which is arranged between the upper end faces of the side posts 112 and the braid main body 161 and has a square frame shape as a whole. The assembly body 161 comprises a daito 162 and a daito 164, and a bracket 163 arranged on the top surface of the daito 162 or the daito 164.

[0037] The braid main body 161 of this embodiment is a three-step-ahead braid, so-called three-step-ahead Tokyo ("To" is the character for "to" with the wood radical and "tou", and "kyo" is the character for "to" with the wood radical and "kyo"). The four heavenly pillars 113 are located inside the bracket connecting body 160 and are connected to the bracket connecting body 160 .

[0038] (Beam connector 150) As shown in Figures 3, 6, 8, and 11 to 13, the cross member connector 150 comprises an upper cross member connector 130 and a lower cross member connector 140 arranged above the upper cross member connector 130.

[0039] The upper beam connector 130 is formed by connecting a plurality of wooden upper beams 131, 132, and is disposed above the column connector 110. The upper beam connector 130 has a lattice shape as a whole.

[0040] Specifically, the upper cross member connector 130 has four upper cross members 131 extending parallel to one another and four upper cross members 132 extending perpendicular to the upper cross members 131 and parallel to one another. The joints between the upper cross members 131, 132 are half-open. The upper cross members 131, 132 are assembled in a lattice pattern so that the heights of the top faces of the upper cross members 131, 132 and the heights of the bottom faces of the upper cross members 131, 132 are the same, and are supported by the top faces of the bracket 163 located at the top of the bracing connector 160 and the top faces of the four heavenly pillars 113.

[0041] As shown in FIGS. 11 to 13, the upper end faces of the four pillars 113 support the lower faces of the two inner upper horizontal members 131 at the portions that intersect with the two inner upper horizontal members 132. As shown in FIGS. 11 and 13, the lower surface of the upper cross member 131 is supported by a braid connector 160 disposed on the upper end surface of the side post 112.

[0042] As shown in FIG. 11, the upper horizontal members 131, 132 are provided with through-holes 133, 134 that extend in the vertical direction and penetrate the upper horizontal members 131, 132. The upper part of the column head bolt 61 protruding upward from the upper end surface of the side column 112 passes through the assembly connector 160 and is inserted into a through-hole 133 that passes through the upper cross-member connector 130. A washer 71 and a nut 72 are attached to the upper end of the column head bolt 61 protruding upward from the top surface of the upper cross-member connector 130.

[0043] The upper part of the column capital bolt 62 protruding upward from the upper end surface of the four-tiered pillar 113 is inserted into a through-hole 134 that penetrates the upper cross members 131, 132. A washer 71 and a nut 72 are attached to the upper end of the column capital bolt 62 protruding upward from the top surface of the upper cross member 132.

[0044] In this way, the upper cross member connector 130 and the head 117 of the column 111 are connected via the column head bolts 61 and 62 that extend in the vertical direction and are inserted into the head 117 . 3, 6, 8, and 11 to 13, the lower beam connector 140 is formed by connecting a plurality of wooden lower beams 141, 142, and is disposed above the upper beam connector 130. The lower beam connector 140 has a lattice shape as a whole.

[0045] More specifically, the lower cross member connector 140 has four lower cross members 141 that extend parallel to one another and four lower cross members 142 that extend perpendicular to the lower cross members 141 and also parallel to one another. The lower cross members 142 are supported on the upper surface of the lower cross member 141. The joints between the lower cross members 141, 142 are cross jaws.

[0046] The upper cross member connector 130 and the lower cross member connector 140 are connected via a cross member bolt 41 extending in the vertical direction. <Two layer assembly 200> 1 and 4, the two-layer assembly 200 has a similar structure to the first layer assembly 100. For this reason, the same components of the two-layer assembly 200 as those of the first layer assembly 100 are given the same reference numerals, and the corresponding components are given the reference numeral "2**," which is the reference numeral "1**" of the components of the first layer assembly 100 plus "200," to avoid redundant explanations.

[0047] The following description will focus on the differences between the respective components of the second layer assembly 200 and the respective components of the first layer assembly 100. As shown in FIG. 4, the two-story assembly 200 includes a column connector 210, a braid connector 260, and a cross member connector 250.

[0048] (Column connection body 210) As shown in Figures 1 and 4, the pillar connector 210 comprises a plurality of wooden pillars 211 (16 in this embodiment) erected on the upper surface of the lower cross member 142, and connecting members 220 that connect the pillars 211 together.

[0049] The 16 pillars 211 consist of 12 side pillars 212 and four Shiten pillars 213, and are arranged in a grid pattern in a plan view. Four side pillars 212 are provided on each side of the second floor. The four Shiten pillars 213 are surrounded by the 12 side pillars 212.

[0050] 13, the side pillar 212 is arranged more inward than the side pillar 112 of the first floor. The four heavenly pillars 213 are arranged more inward than the four heavenly pillars 113 of the first floor. As shown in FIGS. 1 and 4, the leg 214 of the pillar 211 does not have a structure equivalent to the base 121 on the first floor.

[0051] The connecting members 220 include cross members provided between adjacent four pillars 213 and between adjacent side pillars 212 and four pillars 213. 3, 6, and 12, the lower portions of a plurality of column base bolts 51 extending in the vertical direction are inserted into the cross member connector 150 of the first-story assembly 100. The upper portions of the column base bolts 51 protrude upward from the upper surface of the lower cross member 142.

[0052] As shown in FIGS. 12 and 13, in this embodiment, four column base bolts 51 are provided corresponding to the four lower insertion portions 215 of the column 211. As shown in Figure 12, the upper part of the column base bolt 51 is inserted into the lower insertion part 215. The upper end part of the column base bolt 51 is exposed inside the lower groove washer part 216. A washer 71 and a nut 72 are attached to the upper end part of the column base bolt 51. In this way, the leg part 214 of the column 211 and the cross member connector 150 are connected via the column base bolt 51.

[0053] (250 beam connectors) As shown in FIG. 4, the horizontal member connector 250 includes an upper horizontal member connector 230 and a lower horizontal member connector 240 disposed above the upper horizontal member connector 230.

[0054] The upper beam connector 230 is formed by connecting a plurality of wooden upper beams 231, 232, and is disposed above the column connector 210. The upper beam connector 230 has a lattice shape as a whole.

[0055] Specifically, the upper cross-member connector 230 has four upper cross-members 231 extending parallel to one another and four upper cross-members 232 extending perpendicular to the upper cross-members 231 and parallel to one another. The joints between the upper cross-members 231, 232 are half-open. The upper cross-members 231, 232 are assembled in a lattice pattern so that the heights of the top faces of the upper cross-members 231, 232 and the heights of the bottom faces of the upper cross-members 231, 232 are the same, and are supported by the top face of the bracket (not shown) located at the top of the bracing connector 260 and the top face of the four-tiered pillar 213.

[0056] The lower beam connector 240 is formed by connecting a plurality of wooden lower beams 241, 242, and is disposed above the upper beam connector 230. The lower beam connector 240 has an overall lattice shape.

[0057] More specifically, the lower cross member connector 240 has three lower cross members 241 extending parallel to one another and three lower cross members 242 extending perpendicular to the lower cross members 241 and parallel to one another. The lower cross members 242 are supported on the upper surface of the lower cross member 241.

[0058] The central portions of the inner lower horizontal members 241, 242 are separated to allow clearance for the central pillar 80, which will be described later. Although not shown in the drawings, the upper cross member connector 230 and the lower cross member connector 240 are connected via cross member bolts that extend in the vertical direction.

[0059] <Three layer assembly 300> 1 and 5, the three-layer assembly 300 has a similar structure to the first layer assembly 100. For this reason, the same components of the three-layer assembly 300 as those of the first layer assembly 100 are given the same reference numerals, and the corresponding components are given the reference numeral "3**," which is the reference numeral "1**" of the components of the first layer assembly 100 plus "300," to avoid redundant explanations.

[0060] The differences between the respective components of the three-layer assembly 300 and the respective components of the first layer assembly 100 will be described below. As shown in FIG. 5, the three-story assembly 300 includes a column connector 310, a bracing connector 360, and a cross member connector 350.

[0061] (Column connection body 310) As shown in Figures 1 and 5, the pillar connector 310 comprises a plurality of wooden pillars 311 (12 in this embodiment) erected on the upper surface of the lower cross member 241, and connecting members 320 that connect the pillars 311 together.

[0062] The 12 pillars 311 consist of eight side pillars 312 and four Shiten pillars 313. Three side pillars 312 are provided on each side of the three floors. The four Shiten pillars 313 are surrounded by the eight side pillars 312.

[0063] The side pillar 312 is arranged more inward than the side pillars 212 on the second floor. The four heavenly pillars 313 are arranged more inward than the four heavenly pillars 213 on the second floor. As shown in FIGS. 1 and 5, the leg 314 of the pillar 311 is not provided with a structure equivalent to the base 121 on the first floor.

[0064] The connecting member 320 includes a cross member provided between adjacent side posts 312 . 4, the lower portions of a plurality of column base bolts 51 extending in the vertical direction are inserted into the cross member connector 250 of the two-story assembly 200. The upper portions of the column base bolts 51 protrude upward from the upper surfaces of the lower cross members 241, 242.

[0065] The upper part of the column base bolt 51 is inserted into a lower insertion part (not shown) provided in the leg part 314 of the column 311. Then, as in the second layer, the upper end part of the column base bolt 51 is exposed inside a lower trench part (not shown) provided in the leg part 314 of the column 311. A washer and a nut are attached to the upper end part of the column base bolt 51 (neither is shown). In this way, the leg part 314 of the column 311 and the cross-member connector 250 are connected via the column base bolt 51.

[0066] (Beam connector 350) As shown in FIG. 5, the horizontal member connector 350 includes an upper horizontal member connector 330 and a lower horizontal member connector 340 disposed above the upper horizontal member connector 330.

[0067] The upper cross member connector 330 is configured by connecting a plurality of wooden upper cross members 331 and 332 , and is disposed above the column connector 310 . Specifically, the upper cross-member connector 330 has two upper cross-members 331 extending parallel to each other with a gap between them, and two upper cross-members 332 extending perpendicular to the upper cross-members 331 and also extending parallel to each other with a gap between them. The joints between the upper cross-members 331, 332 are half-open. The upper cross-members 331, 332 are assembled in a grid pattern so that the heights of the top faces of the upper cross-members 331, 332 and the heights of the bottom faces of the upper cross-members 331, 332 are the same, and are supported on the top face of the bracket (not shown) located at the top of the bracing connector 360.

[0068] The lower beam connector 340 is configured by connecting a plurality of wooden lower beams 341 and 342 together, and is disposed above the upper beam connector 330 . More specifically, the lower cross-member connector 340 has two lower cross members 341 extending parallel to each other with a gap between them, and two lower cross members 342 extending perpendicular to the lower cross members 341 and also extending parallel to each other with a gap between them. The lower cross members 342 are supported on the upper surface of the lower cross members 341. The lower cross-member connector 340 as a whole has a grid shape.

[0069] Although not shown in the drawings, the upper cross member connector 330 and the lower cross member connector 340 are connected via a cross member bolt extending in the vertical direction. (Shinbashira 80) As shown in Figs. 1 and 4, a central pillar 80 is provided at the center of the tower to support a sorin (not shown) placed on the top of the roof.

[0070] 8, the lower surface of a receiving member 143 is supported between the upper surfaces of two lower horizontal members 141 on the inside of the first story. The lower end surface of the central pillar 80 is supported by the receiving member 143.

[0071] In such a tower, the side pillars 212, 312 and the four heavenly pillars 213, 313 are arranged more inward in the upper floors, and the width of the side surfaces is made smaller, that is, tapered. Next, the construction method of the tower of this embodiment will be described.

[0072] First, a plurality of column base bolts 51 corresponding to each of the columns 111 on the first floor are placed on the foundation 90 so as to protrude upward from the top surface of the foundation 90 (this is the column base bolt placing step). Furthermore, each of the pillars 111 is connected via a connecting member 120, and a pillar connector 110 is formed having a lower insertion portion 115 that opens at the lower end surface of each of the pillars 111 and extends in the vertical direction (this is the pillar connector forming process).

[0073] Furthermore, the column connector 110 is lowered to insert the column base bolts 51 into the lower insertion portions 115 (this is the column base bolt insertion step). At this time, it is preferable to use heavy machinery such as a crane.

[0074] Then, the column connector 110 is connected to the foundation 90 by fastening the column base bolt 51 to the column 111 (this is the column base bolt fastening step). Furthermore, column capital bolts 61, 62 are arranged on each of the columns 111 so as to protrude upward from the upper end surfaces of the columns 111 that constitute the first story (this is the column capital bolt arranging step).

[0075] Furthermore, a plurality of wooden upper beam members 131, 132 are connected to form an upper beam connector 130 having through-holes 133, 134 that penetrate the upper beam members 131, 132 (upper beam connector forming process). A plurality of lower beam members 141, 142 are connected to form a lower beam connector 140 that is disposed above the upper beam connector 130 (lower beam connector forming process). Then, the upper beam connector 130 and the lower beam connector 140 are connected via beam bolts 41 that extend in the vertical direction to form a beam connector 150 (below beam connector forming process).

[0076] Furthermore, the beam connector 150 is lowered to insert the column capital bolts 61, 62 into the through-holes 133, 134 (these are column capital bolt insertion steps). Then, the column capital bolts 61, 62 are fastened to the upper cross members 131, 132, whereby the cross member connector 150 is connected to the column connector 110 (this is the column capital bolt fastening step).

[0077] In this manner, the first floor assembly 100 is assembled on the foundation 90. Next, a plurality of column base bolts 51 corresponding to each of the columns 211 on the second floor are placed on the lower cross members 141, 142 so as to protrude upward from the top surface of the lower cross member 142 on the first floor (this is the column base bolt placement process).

[0078] Furthermore, each of the pillars 211 is connected via a connecting member 220, and a pillar connector 210 is formed having a lower insertion portion 215 that opens at the lower end surface of each of the pillars 211 and extends in the vertical direction (this is the pillar connector forming process).

[0079] Furthermore, the column connector 210 is lowered to insert the column base bolts 51 into the lower insertion portions 215 (this is the column base bolt insertion process). At this time, it is preferable to use heavy machinery such as a crane, as in the first story.

[0080] Then, the column connectors 110, 210 are connected to the lower cross members 141, 142 by fastening the column base bolts 51 to the column 211 (this completes the column base bolt fastening process). Furthermore, column capital bolts 61, 62 are arranged on each of the columns 211 so as to protrude upward from the upper end surfaces of the columns 211 that make up the second floor (this is the column capital bolt arranging step).

[0081] Furthermore, an upper beam connector 230 is formed by connecting a plurality of wooden upper beams 231, 232 and having a through-hole (not shown) that penetrates the upper beams 231, 232, and a lower beam connector 240 is formed by connecting a plurality of lower beams 241, 242 and is arranged above the upper beam connector 230. Then, the upper beam connector 230 and the lower beam connector 240 are connected via beam bolts (not shown) that extend in the vertical direction to form a beam connector 250 (this is the beam connector forming process).

[0082] Furthermore, the cross member connector 250 is lowered and the column head bolt (not shown) is inserted into the through-hole (not shown) (this is the column head bolt insertion step). Then, the column capital bolts 61, 62 are fastened to the upper horizontal members 231, 232, whereby the horizontal member connector 250 is connected to the column connector 210 (this is the column capital bolt fastening step).

[0083] In this way, the second-story assembly 200 is assembled on top of the lower cross member 142 of the first story. Finally, the three-tier assembly 300 is assembled on top of the lower cross member 242 of the second tier in the same manner as the two-tier assembly 200.

[0084] In this way, on each floor, the following processes are carried out: a process of placing bolts for the column base, a process of forming a column connector, a process of inserting bolts for the column base, a process of tightening bolts for the column base, a process of placing bolts for the column head, a process of forming a cross member connector, a process of inserting bolts for the column head, and a process of tightening bolts for the column head.

[0085] Next, the operation of this embodiment will be described. A tower having multiple stories can be easily constructed in which the legs 114, 214, 314 of multiple columns 111, 211, 311 are connected to the foundation 90 or lower cross members 141, 142, 241, 242 via column base bolts 51, and cross member connectors 150, 250, 350 are connected to the heads 117 of multiple columns 111, 211, 311 via column head bolts 61, 62.

[0086] In a tower constructed using this construction method, on the third floor, gravity and uplift forces are transmitted in order from lower beam connectors 340, upper beam connectors 330, columns 311, and lower beam connectors 240 on the second floor. On the second floor, gravity and uplift forces are transmitted in order from lower beam connectors 240, upper beam connectors 230, columns 211, and lower beam connectors 140 on the first floor. On the first floor, gravity and uplift forces are transmitted in order from lower beam connectors 140, upper beam connectors 130, columns 111, and foundation 90. That is, by placing the column head bolts 61, 62 and the column base bolts 51 on the heads 117 and legs 114, 214, 314 of the columns 111, 211, 311, respectively, the columns 111, 211, 311 are able to bear not only vertical compressive forces but also vertical tensile forces.

[0087] In addition, by placing a cross member bolt 41 between the upper cross member connector 130 and the lower cross member connector 140 arranged above the upper cross member connector 130, the axial force of the columns 211, 311 is transmitted from the columns 211, 311 in the floor immediately above to the columns 111, 211 in question.

[0088] Furthermore, the column base bolts 51 and column head bolts 61, 62 are inserted into the legs 114, 214, 314 and heads 117 of the columns 111, 211, 311, respectively. Therefore, these bolts 51, 61, 62 do not appear on the design surface of the tower. Therefore, it is possible to prevent the bolts 51, 61, 62 from damaging the design of the tower.

[0089] Next, the effects of this embodiment will be described. (1) The construction method for a three-story wooden pagoda includes a process of arranging bolts for column bases, a process of forming column connectors, a process of inserting bolts for column bases, a process of tightening bolts for column bases, a process of arranging bolts for column capital parts, a process of forming cross member connectors, and a process of tightening bolts for column capital parts.Then, on each story, the process of arranging bolts for column bases, the process of forming column connectors, the process of inserting bolts for column bases, the process of tightening bolts for column capital parts, the process of forming cross member connectors, the process of inserting bolts for column capital parts, and the process of tightening bolts for column capital parts are performed.

[0090] This configuration achieves the above-mentioned effects, and effectively prevents the wooden three-story pagoda from collapsing due to strong winds such as those caused by typhoons, while preventing the design of the wooden three-story pagoda from being damaged.

[0091] (2) In the column base bolt tightening process, a washer 71 and a nut 72 are attached to the upper end of the column base bolt 51 exposed inside the lower seat groove portion 116, thereby tightening the column base bolt 51 to the column 111.

[0092] According to this method, the washer 71 and the nut 72 can be attached to the upper end of the column base bolt 51 through the lower trench washer 116, making it easy to fasten the column base bolt 51 to the column 111. Furthermore, because only the upper end of the column base bolt 51 is exposed inside the lower trench washer 116, it is possible to further prevent the column base bolt 51 from damaging the design of the wooden building.

[0093] (3) The lower trench 116 is filled with wood, so the upper end of the column base bolt 51 is not exposed through the lower trench 116. This prevents the column base bolt 51 from damaging the design of the wooden building.

[0094] <Modification> This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0095] The braid body 161 is not limited to the three-step-ahead braid, so-called three-step-ahead Tokyo, but can be other braids such as two-step-ahead braids, or can be the so-called cloud Tokyo. The filling process for the lower seat trench portion 116 and the upper seat trench portion 119 may be omitted.

[0096] The present invention is not limited to the construction method of a three-story pagoda, but can also be embodied as the construction method of a five-story pagoda or a seven-story pagoda. The present invention is not limited to the construction of multi-story towers, but can also be applied to other wooden buildings such as temple gates, or to single-story wooden buildings. In this case, the column capital bolt placement process, cross member connector formation process, column capital bolt insertion process, and column capital bolt tightening process can be omitted.

[0097] In the above embodiment, after the cross member connector 150 is formed, the cross member connector 150 is lowered to insert the column head bolts 61, 62 into the through-holes 133, 134. Alternatively, before the cross member connector 150 is formed, only the upper cross member connector 130 may be lowered to insert the column head bolts 61, 62 into the through-holes 133, 134. In this case, after the column head bolt insertion step, the cross member connector 150 can be formed by connecting the upper cross member connector 130 and the lower cross member connector 140 via the cross member bolts 41 extending in the vertical direction. The same applies to two-story and three-story structures.

[0098] The number of side pillars 312 on the third floor can be set to 12, just like on the second floor. The number of column base bolts 51 and the number of column capital bolts 61, 62 provided on one column 111, 211, 311 may be changed.

[0099] The central pillar 80 may be extended to the first floor. The braid connector 160 can also be omitted. In this case, the side posts 112 can be extended to the height of the lower surface of the upper cross-member connector 130, as shown in Figure 14. [Explanation of symbols]

[0100] 41...Bolt for cross beam 51...Column base bolt 61,62...Column head bolts 71...Washer 72...Nut 80…Shinbashira 90…Fundamentals 91…Top surface 100...First layer assembly 110,210,310...Column connection body 111,211,311...pillars 112,212,312…Side pillar 113,213,313...Four Heavenly Pillars 114,214,314…legs 115, 215...Lower insertion part 116,216…Lower seat moat 117...Head 118...Upper insertion part 119…Upper seat moat 120, 220...Connecting member 121...Base 130, 230...Upper cross member connector 131,132,231,232…Upper horizontal member 133, 134...Penetration section 140, 240...Lower cross member connector 141,142,241,242…Lower horizontal member 143...Receiving member 150...Beam connector 160,260...braided connection body 161...Main body of the braid 162...Daito 163...Higigi 164...Dou 165...base 170...pillar 200…Two-layer assembly 300…Three layer assembly

Claims

1. A wooden building construction method comprising: a plurality of wooden pillars; foundations or wooden lower cross members supporting the lower end surfaces of the pillars; and connecting members connecting the pillars; wherein each of the pillars, the foundations or the lower cross members, and the connecting members constitute a story; a column base bolt placement step of placing a plurality of column base bolts corresponding to each of the columns on the foundation or the lower cross member so as to protrude upward from an upper surface of the foundation or the lower cross member; a column connector forming process for forming a column connector in which each of the columns is connected via the connecting member, the column connector having an insertion portion that opens at the lower end surface of each of the columns and extends in the vertical direction; a column base bolt insertion process in which the column connector is lowered and the column base bolt is inserted into the insertion portion; and a column base bolt tightening step of fastening the column base bolt to the column to connect the column connector to the foundation or the lower cross member. Construction method of wooden buildings.

2. In the column base bolt tightening step, a washer and a nut are attached to the upper end of the column base bolt, which is exposed inside a seat groove portion that opens on the outer surface of the column and communicates with the insertion portion, thereby tightening the column base bolt to the column. A method for constructing a wooden building according to claim 1.

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