JP7356695B2 - wooden building structure - Google Patents

Description

The present invention relates to the construction of new wooden buildings.

The structure of conventional wooden buildings is either a wooden frame structure made up of pillars, beams, and foundations, or a wooden frame wall structure made up of multiple flat plates (2x4 structure). ) is common.

The wooden frame structure is the traditional type used in the most wooden buildings in Japan, and is a structure in which various pillars are assembled using vertical wood, and foundations and beams are assembled using horizontal wood. The shaft supports the load from above. Then, flooring materials are laid on top of these frameworks to form the floor. In this way, the wooden frame structure is assembled using linear wood, so there are fewer structural restrictions and a higher degree of freedom in floor plan and design.

On the other hand, a wooden frame wall structure is often used in the United States and other countries, and is a structure in which a frame is made using specified lumber, and a box is made from wooden panels covered with plywood. While the wooden frame structure mentioned above has a "shaft," it is made up of "planes," and is supported by walls instead of columns, and floors and ceilings instead of beams. In addition, compared to wooden frame structures, construction is relatively easy and does not depend on the skill of the craftsman, and the construction period is short.

As mentioned above, conventional wooden framework structures have few structural restrictions and have a high degree of freedom in floor plan and design, but on the other hand, they are difficult to construct and depend on the skill of the craftsman. Also, the construction period is relatively long. On the other hand, while wooden frame wall structures are relatively easy to construct, do not depend on the skill of the craftsman, and require a short construction period, they are subject to limitations and have a low degree of freedom. Furthermore, although wooden frame wall structures are less dependent on the skill of craftsmen, wooden frame structures are the mainstream in Japan.

An object of the present invention is to provide a new wooden building structure that is easier to construct than conventional wooden frame structures, has a shorter construction period, and has a very high degree of freedom without the constraints of wooden frame wall structures.

The structure of the wooden building according to one aspect of the present invention includes a first flat plate part in which long plates extending in a first direction are lined up and bonded together, and a long plate part extending in a second direction perpendicular to the first direction are lined up and bonded together. a plurality of plate materials in which second flat plate portions are alternately laminated, and a plurality of pillar materials, the upper surface or the lower surface of the plate materials and the end of the pillar material are joined, and the plate material The first flat plate part or the second flat plate part functions as a beam.

According to this configuration, the vertical timber in the conventional wooden framework structure is used as a pillar, and the horizontal timber such as a beam is made of a first flat plate part consisting of a long plate extending in the first direction of the board material or extending in the second direction. By being carried by the second flat plate part made up of long plates, it can fit within the framework of a conventional wooden frame structure, but it also eliminates the need for horizontal members, making construction easier and shortening the construction period. becomes possible. Similarly, eliminating the need for joists also facilitates construction and shortens the construction period.

Furthermore, since this structure fits within the framework of a conventional wooden frame structure, it is relatively easy for Japanese craftsmen to handle it. Furthermore, by replacing horizontal wood with board materials, it is expected that the sound insulation performance of the floor and in-plane shear rigidity will be improved.

In addition, in the case of conventional wooden frame structures, it was necessary to calculate and design the vertical ratio of columns and walls. The direct-below ratio of columns is a value indicating how many first-floor columns are below second-floor columns. The direct wall ratio is a value that indicates how much of the load-bearing wall on the first floor is below the load-bearing wall on the second floor. Specifically, the ratio of directly under columns = (number of columns with the same column position on the 1st and 2nd floors / number of columns on the upper floor) x 100 (%), the ratio of directly under walls = (load-bearing walls on the 1st and 2nd floors) The ratio of the length of the wall with the same position/length of the wall on the upper floor) x 100 (%) is called the direct-down ratio.

As shown in Figure 11, it can be seen that the higher the direct hit rate, the less damage caused by earthquakes, etc., and the damage decreases significantly when the direct hit rate reaches 50 to 60%. Therefore, it is currently recommended that the direct-down ratio be 60% or more, and in the case of conventional wooden frame structures, it is recommended that this be incorporated into the design.

On the other hand, with the structure of the present invention described above, it is possible to provide seismic resistance equivalent to or greater than the direct impact rate of 100% (see FIGS. 12 and 13). These figures are graphs showing the amount of deformation and deformation ratio when a load is applied to the structure. As shown in this graph, the structure of the present invention described above has strong earthquake resistance, and at the same time, can be designed without much consideration of the direct impact ratio. In other words, it is possible to create wooden buildings with various structures while providing strong earthquake resistance.

Moreover, in the structure of this wooden building, the board material has a plurality of holes on the upper surface or the lower surface. According to this configuration, by fitting the end portion of the pillar material into this hole, the plate material and the pillar material can be firmly joined. Note that the hole in the plate material may have a shape into which the end of the pillar material fits as is, or in the case of a configuration in which the end of the pillar material has a protrusion, the hole may have a shape into which the protrusion fits.

Moreover, the structure of this wooden building further includes a foundation arranged below the wooden building, and the board is arranged on the foundation, or the board is arranged on the foundation via a foundation. According to this configuration, the foundation in the conventional wooden framework structure is no longer an essential component, and the elimination of the foundation further facilitates construction and shortens the construction period. Furthermore, by using the board material as a floor, it becomes possible to standardize the foundation due to the very high surface rigidity of this board material. Furthermore, since the planks are simply laid on a standardized foundation, the construction period can be significantly shortened, leading to significant cost reductions. In addition, if the structure is based on a foundation, the structure will be similar to a conventional wooden frame structure, and it will be relatively easy for conventional craftsmen to handle it.

In addition, conventionally, foundations were required for the overhanging parts as shown in the broken line in Figure 14, but by using plate materials, the high out-of-plane rigidity of the plate material allows it to withstand the load with a cantilevered structure. The foundation of the part is no longer required. Therefore, as mentioned above, a rectangular foundation can be used, reducing construction time and costs, and standardizing the foundation. In addition, when installing a balcony, for example, pillars were required to support it in conventional structures, but by using this plate material, it is now possible to support the balcony part on a cantilever, which eliminates the pillars that were previously required. It can be made unnecessary. According to the inventors' experiments, it was possible to support a 3 m overhang with a cantilever.

Moreover, in the structure of this wooden building, a joining member is arranged at the joining part between the upper end or lower end of the pillar material and the board material. According to this configuration, even when there is no hole in the plate material, the column material and the plate material can be joined by the joining member. Furthermore, even if there are holes in the plate materials, they can be firmly joined by the joining member.

Moreover, the structure of this wooden building is provided with braces on a surface formed by the two pillars and an upper or lower plate joined to the two pillars. Here, the braces include double braces and single braces made of long plate-like plates, K-shaped braces, chin-shaped braces, and brace dampers made of steel bars and shaped steel such as angles. According to this configuration, the strength and earthquake resistance of the wooden building are improved.

Further, in the structure of this wooden building, a face plate may be provided on a surface formed by the two pillars and an upper or lower plate joined to the two pillars. .

Further, in the structure of this wooden building, a predetermined number of pillars among the plurality of pillars are arranged along the first direction, and a column row consisting of the predetermined number of pillars is arranged along the first direction. They are arranged in parallel in a row along the second direction, and the first flat plate part or the second flat plate part of the plate material functions as a beam or a joist. By arranging the plurality of pillar materials in this way, the long plate extending in the first direction of the first flat plate part of the plate material or the long plate extending in the second direction of the second flat plate part of the plate material can effectively function as a horizontal member. Demonstrate.

Further, the structure of this wooden building is such that the boards are stacked such that the first flat plate part and the second flat plate part are alternately stacked, and the first flat plate part is exposed on the upper and lower surfaces of the board. The first flat plate part and the second flat plate part are alternately stacked, and the first flat plate part is arranged on the uppermost surface and the lowermost surface, and the uppermost surface is arranged so as to sandwich them. The first flat plate portions are further disposed above and below the bottom surface, respectively.

According to this configuration, the first flat plate part is disposed on the upper surface and the lower surface of the plate material, and the second flat plate part is sandwiched between the first flat plate part (in the case of three layers), or the first flat plate part and the second flat plate part are sandwiched between the first flat plate part and the second flat plate part. The flat plate portion and the first flat plate portion are alternately laminated (in the case of five or more layers).

In addition, the structure of this wooden building is such that the first flat plate part and the second flat plate part are alternately stacked on the board, and the first flat part is exposed on either the upper surface or the lower surface of the board, The plates are laminated so that the second flat plate portion is exposed on the other of the upper and lower surfaces of the plates. According to this configuration, the number of the first flat plate portions and the second flat plate portions of the plate material are the same, and the strength in the vertical and horizontal directions becomes approximately equal.

In addition, the structure of this wooden building includes a plurality of the above-mentioned plate members, and the first plate member is arranged above a first column group composed of a predetermined number of column members among the plurality of column members, and The upper end of the column group and the lower surface of the first plate are joined, a second plate is disposed below the first column group, and the lower end of the first column group and the lower surface of the first plate are joined. The upper surface of the second plate member is joined to the upper surface of the second plate member, and the second plate member is arranged above the second column group made up of a predetermined number of pillar members among the plurality of pillar members, and the second plate member is The upper end portion and the lower surface of the second plate member are joined.

Further, in the structure of this wooden building, the lower end of the second group of columns and the upper surface of the foundation are joined. Alternatively, a third plate member may be disposed below the second column group, and the lower end of the second column group and the upper surface of the third plate member may be joined.

In addition, the structure of this wooden building includes a plurality of the above-mentioned board materials, the first board material has the plurality of holes provided on the top surface and the bottom surface, and the second board material has the plurality of holes provided at least on the bottom surface, A first plate is attached above a first group of columns among the plurality of columns by fitting one protrusion of the first group into a hole in the lower surface of the first plate, and The base is attached below the first group of columns by fitting the other protrusion of the first group into the hole of the base, and the base is attached above the second group of columns among the plurality of columns. A second plate is attached by fitting one protrusion of the second group of columns into a hole on the lower surface of the second plate, and a first plate below the second group of columns, The second pillar group may be attached by fitting the other protrusion into a hole in the upper surface of the first plate.

In addition, the structure of this wooden building includes a first flat plate section made up of long plates extending in a first direction, and a second flat plate section made up of long plates extending in a second direction perpendicular to the first direction. and a plurality of pillar materials, the plate material having a plurality of holes into which ends of the plurality of pillar materials fit, respectively, and the plurality of pillar materials having a plurality of holes. The plate material is disposed above, the plurality of pillars are fitted into holes of the plate material, respectively, and attached, the first flat plate part of the plate material functions as a beam, and the second flat plate part functions as a joist. It may also be a configuration.

The structure of the wooden building according to one aspect of the present invention includes a first flat plate part formed by arranging elongated plates extending in a first direction, and an elongated plate part formed by arranging elongated plates extending in a second direction perpendicular to the first direction. a plurality of pillars, the plate is arranged above the plurality of pillars, and the plurality of pillars and the plate are joined. The first flat plate portion of the plate material may function as a beam, and the second flat plate portion may function as a joist.

According to the present invention, construction is easier and the construction period is shorter than conventional wooden frame structures, and there are fewer restrictions and a higher degree of freedom than wooden frame wall structures.

1 is a schematic diagram showing the structure of a wooden building according to an embodiment of the present invention. It is an explanatory view showing a joint part of a column material and a base. FIG. 3 is an explanatory diagram showing a joint between a pillar material and a plate material. It is an explanatory view showing a column material and a board material. It is an explanatory view showing correspondence between board material and constituent members of a conventional wooden frame structure. It is a schematic diagram showing the structure of a wooden building with braces attached. It is an explanatory view showing a joint part of a column material and a foundation. It is a schematic diagram which shows the modification of the structure of a wooden building. It is a schematic diagram which shows the modification of the structure of a wooden building. It is an explanatory view showing a junction of a column material and a board material of a modification of the structure of a wooden building. It is an explanatory view showing a junction of a column material and a board material of a modification of the structure of a wooden building. 1 is a schematic diagram showing the structure of a wooden building according to an embodiment of the present invention. It is a graph showing the direct fall rate and the accident accident rate in a conventional wooden frame structure. It is a graph which shows the deformation amount at the time of an earthquake with respect to the direct fall rate in the conventional wooden frame structure and the wooden building structure of the present invention. It is a graph showing the deformation ratio at the time of an earthquake to the direct fall rate in the conventional wooden frame structure and the wooden building structure of the present invention. It is an explanatory diagram about a foundation and a foundation. It is a graph showing the bearing strength of a floor of a conventional wooden frame structure and a floor of a wooden building structure of the present invention.

Hereinafter, one embodiment of the present invention will be described based on the drawings, but the present invention is not limited to the following embodiment. In this embodiment, the structure of a two-story wooden building will be described as an example, but the present invention is also applicable to one-story, three-story or more wooden buildings. In addition, in this embodiment, as an example, a plate material having a three-layer structure in which one second flat plate part is sandwiched between two first flat plate parts will be used. A plate material having three or more layers is also applicable. In addition, in this embodiment, an example will be explained in which a column material having a protrusion at the end and a plate material having a hole on the top or bottom surface are used. It is also possible to use plate materials without

<First embodiment>
(Structure of wooden building)
FIG. 1 is a schematic diagram showing the structure of a wooden building according to an embodiment of the present invention. FIG. 2 is an explanatory diagram showing a joint between a pillar material and a foundation. FIG. 3 is an explanatory diagram showing a joint between a pillar material and a plate material. FIG. 4 is an explanatory diagram showing the pillar material and the plate material. FIG. 5 is an explanatory diagram showing the correspondence between the plate materials and the constituent members of a conventional wooden framework structure.

As shown in FIG. 1, the wooden building 10 has a two-story structure, and mainly includes a lower foundation 4, a foundation 3 on the foundation, a plurality of pillars 2, and two plates 1. Prepare as a configuration. Although FIG. 1 shows a configuration without a roof, a roof structure similar to that of a conventional wooden frame structure may be used.

The foundation 4 is made of reinforcing bars and concrete, and is laid on the ground, like a conventional wooden frame structure. The base 3 is a horizontal wooden material made of cypress, for example, and is fixed to the base 4 with anchor bolts. Further, a plurality of holes 31 are provided on the upper surface of the base 3, and these holes 31 fit into the protrusions 21 of the pillar material 2 (see FIG. 2).

The pillar material 2 is a wooden vertical material made of, for example, cedar, and is provided with a protrusion 21 at the lower end and a protrusion 22 at the upper end (see FIG. 4). Further, at the joint where the protrusion 21 of the pillar 2 and the hole 31 of the base 3 fit together, a metal fitting 5 screwed across the pillar 2 and the base 3 is used as a reinforcing material (see Fig. 2). ).

As shown in FIGS. 3, 4, and 5, the plate material 1 includes a first flat plate part 11 in which a plurality of long wooden boards extending in a first direction The second flat plate portion 12 is a plate material in which a plurality of long wooden plates extending in the Y direction are lined up and bonded together, and the second flat plate portions 12 are alternately stacked and bonded together. Specifically, the plate material 1 of this embodiment has a three-layer structure in which one second flat plate part 12 is stacked between two first flat plate parts 11 facing each other.

Note that the three-layer structure of the plate material 1 is an example of the present embodiment, and a five-layer structure in which three first flat plate parts 11 and two second flat plate parts 12 are interposed between each, or a Seven-layer structure with four flat plate parts 11 and three second flat plate parts 12, and in order from the bottom, two first flat plate parts 11, one second flat plate part 12, and one first flat plate part 11. , a seven-layer structure including one second flat plate portion 12 and two first flat plate portions 11 may be used. Further, each long plate may have the same width, but it is also possible to configure the flat plate portion using long plates having different widths.

In addition, two boards 1 are used in the wooden building 10, and one is the lower board 1 (the lower board is referred to as "1A") which becomes the ceiling of the first floor and the floor of the second floor of the wooden building 10. The other one is the upper board 1 (the upper board is referred to as "1B") which becomes the ceiling of the second floor. The lower plate material 1A has a plurality of holes 13 formed on its lower surface at positions corresponding to the plurality of pillar materials 2 serving as the first floor pillars, into which the protrusions 22 at the upper ends of the pillar materials 2 fit. In addition, the lower plate material 1A has a plurality of holes 13 formed on its upper surface at positions corresponding to the plurality of pillar materials 2 that will become the pillars of the second floor, into which the protrusions 21 at the lower end fit (see FIG. 4). .

At each joint where the hole 13 on the lower surface of the board 1A and the protrusion 22 of the pillar 2 of the first floor part fit together, a metal fitting is screwed so as to span the board 1A and the pillar 2. In addition, at each joint where the hole 13 on the top surface of the plate material 1A and the protrusion 21 of the column material 2 on the second floor part fit together, the plate material 1A and the column material are similarly connected. A metal piece screwed across two parts is used as a reinforcing material (see reference numeral 6 in FIG. 3).

On the other hand, the upper plate material 1B, which serves as the ceiling of the second floor of the wooden building 10, has protrusions 22 at the upper ends of the pillar materials 2 fitted in positions corresponding to the plurality of pillar materials 2, which serve as the pillars of the second floor, on the lower surface. A plurality of holes 13 are formed. Then, at each joint where the hole 13 on the lower surface of the plate material 1B and the protrusion 22 of the pillar material 2 of the first floor part fit together, a metal fitting is screwed so as to span the plate material 1B and the pillar material 2. is used as a reinforcing material.

As shown in FIG. 5, in this plate material 1, a plurality of long plates extending in the first direction X of the first flat plate portion 11 correspond to horizontal members such as beams and girders in a conventional wooden frame structure. As a result, the elongated plate of the second flat plate portion 12 extending in the second direction Y corresponds to a crossbar, that is, a joist, which is passed under the floor to support the floorboard in a conventional wooden framework structure.

(Effects of this embodiment)
With this configuration, the pillars and the long plates of the first flat plate portions 11 corresponding to the horizontal members have a structure similar to that of a conventional wooden frame structure. Furthermore, since the long plate of the second flat plate portion 12 corresponds to a joist, the horizontal structural members and joists in a conventional frame structure, that is, the horizontal structural surface of a conventional wooden frame structure, are It can be replaced with a plate material 1 in which two flat plate parts 12 are laminated. This eliminates the need for horizontal members and flooring for the framework in conventional framework structures, making construction easier and shortening the construction period.

In addition, the inventors of the present application conducted tests to verify the effects of this embodiment. The first test compared the seismic resistance of a conventional frame structure (with various dipping ratios) and the structure of this embodiment, and examined the amount of deformation and deformation ratio when a load was applied to each structure. It is used to measure The smaller the amount of deformation or the deformation ratio, the higher the earthquake resistance. The results are shown in FIGS. 12 and 13.

As shown in FIGS. 12 and 13, the structure of this embodiment was found to have earthquake resistance equal to or higher than that of 100% direct impact. In this manner, the structure of this embodiment provides strong earthquake resistance and at the same time allows for flexible design without much consideration of the direct impact ratio. In other words, it is possible to create wooden buildings with various structures while providing strong earthquake resistance.

The second test was about the rigidity of the floor. The inventors of the present application conducted tests on the rigidity of the floor in the structure of this embodiment, and compared the results with the results of a floor with a conventional frame structure. Note that the conventionally constructed floor is one in which commonly used plywood flooring is nailed to a framework.

In this test, a load is applied from the side surface of each floor, that is, from the end surface in the thickness direction in a direction horizontal to the floor surface, and the yield strength of the floor is measured from the amount of deformation of the floor at that time. This is generally referred to as a horizontal shear test. In addition, regarding the test results of the floor of the conventional frame structure, the test results of the publicly known literature were used, and the test results of this embodiment were compared with the test results.

FIG. 15 is a graph showing the test results, in which (a) is the floor of this embodiment, and (b) is a graph showing the relationship between the shear stress and the deformation angle obtained from the shear force test. ) is a conventional frame structure floor, and is a graph showing the relationship between shear strength and deformation angle obtained from a shear force test of a nailed plywood floor. As shown in FIG. 15, the yield strength of the floor (standard) of the conventional frame structure at 1/150 rad (0.0067 rad) is approximately 11.8 kN/ ^m2 , but the yield strength of the floor of this embodiment is: From the graph, it is about 2.5 N/mm ² , and when this is multiplied by the thickness of 150 mm and the width of 1000 mm, it becomes about 375 kN/m ² . Then, when each proof stress is divided by 1.96 kN (wall magnification 1.0), the floor of the conventional frame structure is 6 times as strong, and the floor of this embodiment is 191 times as strong. From this result, it was found that the rigidity of the floor of this embodiment was significantly improved compared to the conventional floor.

(Modification 1)
FIG. 6 is a schematic diagram showing the structure of a wooden building equipped with braces. FIG. 7 is an explanatory diagram showing the joint between the pillar material and the base. As shown in FIGS. 6 and 7, the wooden building of this embodiment is provided with braces diagonally connecting the joints between the pillars 2 and the foundations 3 and the joints between the pillars 2 and the plates 1. good. Furthermore, braces may be provided to diagonally connect the joints of the pillar material 2 and the plate material 1.

Specifically, as shown in FIG. 7, braces 7 are installed from the joint between the pillar 2 and the base 3 to the joint between the adjacent pillar 2 and the lower surface of the plate 1 (not shown). Moreover, the brace 7 is fixed to the column material 2 by metal fittings 8, for example. Note that the shape of the hardware 8 is just an example, and a hardware with a different structure may be used. Further, this embodiment is an example in which a single brace is installed, and it is also possible to install a double brace.

In this way, the structure of the wooden building of this embodiment can be fitted with braces in the same way as conventional wooden frame structures, and by providing braces connecting each joint diagonally, strength and earthquake resistance can be improved. This makes it possible to improve performance.

(Modification 2)
FIG. 8A is a diagram showing another modification of the structure of a wooden building, and is a schematic diagram showing a structure with a panel attached. As shown in FIG. 8A, the wooden building of this embodiment has a surface surrounded by two pillars 2, a foundation 3, and a board 1, and a surface surrounded by two pillars 2 and two boards 1. A material 9 may be provided.

(Modification 3)
FIG. 8B is a diagram showing another modified example of the structure of a wooden building. In the above embodiment, a plurality of pillars are arranged vertically and horizontally as in the conventional wooden frame construction method, but the present invention By using this structure, as shown in FIG. 8B, it is also possible to arrange the pillars sparsely without arranging them vertically and horizontally. In the conventional wooden frame construction method, sufficient strength could not be obtained with such a sparse arrangement, but by using the present invention, sufficient strength can be obtained even with a sparse arrangement.

(Modification 4)
FIG. 9A is a diagram showing another modification of the structure of a wooden building, in which the protrusion 21 is not provided at the end of the pillar, and the end of the pillar is fitted into the hole in the board as it is. FIG. 3 is a diagram showing a joint between a board and a pillar showing the structure of a wooden building. As shown in FIG. 9A, the wooden building of this embodiment has a structure in which the ends of the pillars 2 do not have protrusions 21, and the ends of the pillars 2 are fitted into the holes of the board 1 as they are. Further, as shown in FIG. 9B, a structure may be adopted in which the plate and the pillar are fixed with metal fittings or the like without providing holes in the plate.

<Second embodiment>
Next, a second embodiment having a different structure from the first embodiment described above will be described. FIG. 10 is a schematic diagram showing the structure of a wooden building according to the second embodiment. The main difference from the first embodiment described above is that the base 3 is eliminated and the plate material 1 is placed on the foundation 4. The differences will be mainly explained below. Note that the same reference numerals are used for components having the same structure as in the first embodiment.

As shown in FIG. 10, the wooden building 20 has a two-story structure and mainly includes a lower foundation 4, a plurality of pillars 2, and three plates 1. Although FIG. 10 shows a configuration without a roof, a roof structure similar to that of a conventional wooden frame structure may be used. In addition, three boards 1 are used in the wooden building 20, one is the lower board 1 (the lower board is referred to as "1X") which becomes the floor of the first floor of the wooden building 20; One is the lower board 1 (the central board is referred to as "1Y"), which becomes the ceiling of the first floor and the floor of the second floor of the wooden building 20, and the other is the upper board 1 (the upper board is referred to as "1Y"), which becomes the ceiling of the second floor. The plate material is referred to as "1Z").

The foundation 4 is made of reinforcing bars and concrete, and is laid on the ground, like a conventional wooden frame structure. The board material 1X is spread over the upper surface of the foundation 4, and the board material 1X and the foundation 4 are tightly connected by, for example, anchor bolts. Further, a plurality of holes 13 are provided on the upper surface of the plate material 1X, and the holes 13 fit into the protrusions 21 of the pillar material 2. Note that the pillar material 2 is a wooden vertical material made of, for example, cedar, and is provided with a protrusion 21 at the lower end and a protrusion 22 at the upper end.

A plurality of holes 13 into which protrusions 22 at the upper ends of the pillars 2 are fitted are formed on the lower surface of the central plate 1Y at positions corresponding to the plurality of pillars 2 serving as the pillars of the first floor. In addition, the central board 1Y has a plurality of holes 13 formed on its upper surface at positions corresponding to the plurality of pillars 2 that will become the pillars of the second floor, into which the protrusions 21 at the lower end fit (see Fig. 4). .

At each joint where the hole 13 on the lower surface of the plate material 1Y and the protrusion 22 of the pillar material 2 of the first floor part fit, a metal fitting is screwed so as to span the plate material 1Y and the pillar material 2. is used as a reinforcing material. In addition, screws are similarly secured to the joints where the holes 13 on the top surface of the board 1Y and the protrusions 21 of the pillars 2 on the second floor fit together so as to span the board 1Y and the pillars 2. The metal fittings are used as reinforcing materials (see reference numeral 6 in FIG. 3).

On the other hand, the upper plate material 1Z, which serves as the ceiling of the second floor of the wooden building 20, has protrusions 22 at the upper ends of the pillar materials 2 fitted in positions corresponding to the plurality of pillar materials 2, which serve as the pillars of the second floor, on the lower surface. A plurality of holes 13 are formed. Then, at each joint where the hole 13 on the lower surface of the board 1Z and the protrusion 22 of the pillar 2 on the first floor are fitted, there is a metal fitting screwed so as to span the board 1Z and the pillar 2. is used as a reinforcing material.

With this configuration, in addition to the effects of the first embodiment described above, there is no need to assemble the foundation 3 on the foundation 4 or to separately lay flooring material, and it is sufficient to fix the board material 1 and the foundation 4, so that Construction is easier, the construction period can be significantly shortened, and costs can be greatly reduced. It also becomes possible to standardize the foundation.

As mentioned above, the preferred embodiments of the present invention have been described with reference to the drawings, but various additions, changes, or deletions can be made without departing from the spirit of the present invention. For example, although the above embodiment is an example of a plate material having a structure in which the first flat plate part has a larger number of laminated layers than the second flat plate part, the present invention is not limited to this, and the first flat plate part and the second flat plate part are alternately laminated in the same number of layers. It is also possible to use a plate material made of aluminum.

1 Plate 11 First flat plate part 12 Second flat plate part 13 Hole 2 Pillar 21 Projection 22 Projection 3 Foundation 31 Hole 4 Foundation 5 Hardware 6 Hardware 7 Bracing 8 Hardware 9 Panel material 10 Wooden building 20 Wooden building

Claims (7)

A plurality of alternately laminated first flat plate portions in which long plates extending in a first direction are lined up and bonded together, and second flat plate portions in which long plates extending in a second direction perpendicular to the first direction are lined up and bonded. board material,
a plurality of pillars having protrusions at their ends for joining with the plate materials,
The plate material has a plurality of holes on an upper surface or a lower surface into which the protrusions of the plurality of pillar materials fit, respectively,
The hole of the plate material and the protrusion of the pillar material are fitted and attached,
In the plurality of pillar materials, a predetermined number of pillar materials are arranged along the first direction, and a first flat plate portion of the plate material functions as a beam,
further comprising a foundation placed below the wooden building, and placing the board on the foundation, or placing the board on the foundation via a foundation;
A structure of a wooden building in which the lower plate material and the upper plate material are connected via the pillar material . A joining member is disposed at the joint between the upper end or the lower end of the pillar material and the plate material,
The structure of a wooden building according to claim 1. A brace is provided on a surface formed by the two pillars and an upper or lower plate joined to the two pillars.
The structure of a wooden building according to claim 1. A face material is provided on a surface formed by the two pillar materials and an upper or lower plate material joined to the two pillar materials,
The structure of a wooden building according to claim 1. A column row consisting of the predetermined number of column materials is arranged in a row along the second direction parallel to the first direction,
The first flat plate part or the second flat plate part of the plate material functions as a beam or a joist,
The structure of a wooden building according to claim 1. The plate material is
The first flat plate part and the second flat plate part are stacked alternately, and the first flat plate part is stacked so that the first flat plate part is exposed on the upper and lower surfaces of the plate material,
Alternatively, the first flat plate part and the second flat plate part are alternately stacked, and the first flat plate part is arranged on the uppermost surface and the lowermost surface, and the first flat plate part is placed on the uppermost surface and the lowermost surface so as to sandwich them. The first flat plate portions are further arranged below the lower surface,
The structure of a wooden building according to claim 1. The plate material is
The first flat plate portion and the second flat plate portion are alternately stacked,
The plates are laminated so that the first flat plate portion is exposed on either the upper surface or the lower surface of the plate material, and the second flat plate portion is exposed on the other of the upper surface or the lower surface of the plate material.
The structure of a wooden building according to claim 1.

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