JP6774142B2 - Mounting brackets, timber connecting brackets, wood connecting methods and buildings - Google Patents

Description

The present invention relates to a mounting bracket, a wood connecting bracket, a wood connecting method, and a building.

When constructing a building such as a house, in the conventional construction method, columns and beams are connected to form the frame of the house. The skeleton formed by these columns and beams must support the loads of the roofs, walls and other components that make up the house, and must withstand the shaking caused by an earthquake. Therefore, the joints of columns and beams, which are mainly composed of square timber, need to have a binding force that can withstand these loads. Then, as a method for bonding wood having such a bonding force, there is a method using metal fittings as described in Patent Document 1.

The method of joining wood described in Patent Document 1 is to engage a U-shaped metal fitting attached to one of the woods to be joined and a drift pin inserted through the wood processed so as to engage with the U-shaped metal fitting. Is. That is, the U-shaped metal fitting supports the load acting on the timber to be bonded via the drift pin. The drift pin is a rod-shaped body that has a shaft that penetrates the wood, and the weight of the members that make up the house and the force that acts on the joint due to shaking such as an earthquake are all supported through the drift pin. Become. When a large load acts on the drift pin, the stress is concentrated in the small-diameter hole through which the drift pin is mounted. Therefore, when the load becomes excessive, the drift pin is inserted. Wood may be destroyed around the holes.

Japanese Unexamined Patent Publication No. 2008-20392

The above-mentioned destruction of wood occurs when the drift pin has a small diameter and the area of the portion supporting the drift pin (contact area with the drift pin) is narrow, and the load is concentrated on this narrow area and the stress increases. However, if the diameter of the drift pin is simply increased to reduce stress concentration, the amount of wood scraped to form a hole through which the drift pin is formed increases, which reduces the strength of the wood itself. ..
The present invention has been invented in view of the above circumstances, and is a mounting bracket for a shaft member having a function similar to that of a drift pin or a drift pin, which can increase the bonding strength between woods without lowering the strength of the wood itself. The issue is the provision of

In order to solve the above problems, the present invention has the following configurations. That is,
A mounting bracket used to fasten wood to each other.
A connecting pin having a bottom wall portion having a hole portion penetrating the front and back in the center and a side wall portion erected over the entire outer edge of the bottom wall portion, and having a rod-shaped shaft portion is inserted or screwed into the hole portion. A mounting bracket characterized in that all or part of the load acting on the connecting pin is formed to be supportable via the side wall portion by being combined.

Further, the present invention is characterized by having the following configuration. That is,
A mounting bracket having a bottom wall portion having holes penetrating the front and back in the center and a side wall portion erected over the entire outer edge of the bottom wall portion.
A connecting pin having a rod-shaped shaft that can be inserted or screwed into the hole,
A wood connecting metal fitting having a fixing means for fixing the end portion of the connecting pin to the bottom wall portion.

Further, the present invention is characterized by having the following configuration. That is,
A mounting bracket having a bottom wall portion having holes penetrating the front and back in the center and a side wall portion erected over the entire outer edge of the bottom wall portion.
A connecting pin having a rod-shaped shaft that can be inserted or screwed into the hole,
It has a fixing means for fixing the end of the connecting pin to the bottom wall.
A through hole through which the connecting pin is inserted is formed in wood, and recesses into which the mounting bracket can be inserted are formed at both ends of the through hole.
A method for connecting wood, characterized in that both ends of a connecting pin inserted through the through hole are fixed via mounting brackets fitted into recesses formed at both ends of the through hole.

Further, the present invention is characterized by having the following configuration. That is,
It is a building that has multiple columns and multiple beams made of timber connected to each other as a skeleton.
A mounting bracket having a bottom wall portion provided with a hole portion penetrating the front and back in the center as a means for joining all or part of the wood to each other and a side wall portion erected over the entire outer edge of the bottom wall portion.
A connecting pin having a rod-shaped shaft that can be inserted or screwed into the hole,
A connecting means including a fixing means for fixing the end portion of the connecting pin to the bottom wall portion is provided.
A through hole through which the connecting pin is inserted is formed in wood, and recesses into which the mounting bracket can be inserted are formed at both ends of the through hole.
A building characterized in that both ends of a connecting pin inserted into the through hole are fixed via mounting brackets fitted into recesses formed at both ends of the through hole.

The present invention relates to a mounting bracket for connecting pins used to connect wood to each other, and by dispersing the load acting on the wood, the bonding strength can be increased and the breakage resistance of the wood can be increased. It has the effect of.
Further, since the mounting bracket is formed as a bottomed tubular shape, it is lighter in weight and can be manufactured at low cost than the bracket having substantially the same function and strength formed as a medium body. are doing.

It is explanatory drawing of the mounting bracket which concerns on this embodiment. It is explanatory drawing regarding the use example of the mounting bracket which concerns on this embodiment. It is explanatory drawing of the state in which the mounting bracket which concerns on this embodiment is attached to wood. It is explanatory drawing about the other use example of the mounting bracket which concerns on this embodiment. It is explanatory drawing of the mounting bracket which concerns on Example 1. FIG. It is explanatory drawing of the mounting bracket and the connecting pin which concerns on Example 2. FIG. It is explanatory drawing of the state in which the mounting bracket and the connecting pin which concerns on Example 2 are attached to wood. It is explanatory drawing of the state in which the mounting bracket and the connecting pin which concerns on Example 3 are attached to wood. It is explanatory drawing of the connection pin which concerns on Example 4. FIG. It is explanatory drawing of the connection pin which concerns on Example 5. FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
1A and 1B are explanatory views of a washer-shaped mounting bracket 1 according to a mode for carrying out the present invention, FIG. 1A shows an external perspective view, and FIG. 1B is shown in FIG. 1A. It shows a cross-sectional view in the direction of the AA line.
The mounting bracket 1 includes a bottom wall (bottom wall portion) 3 having a hole (hole portion) 2 penetrating the front and back in the center and a side wall (side wall portion) 4 erected over the entire outer edge of the bottom wall portion 3. It is a metal fitting with a low bottomed tubular shape.
As an example, a steel plate having a wall thickness of 1.6 mm is punched out in a circular shape, and while forming a circular hole 2 in the center, the outer peripheral edge is bent and bent up so as to form a continuous side wall 4 using a die. It is a thing. As the material constituting the mounting bracket 1, it is preferable to use a strong metal material such as iron, steel plate, or stainless steel. Further, the wall thickness is appropriately set according to the required strength.

The mounting bracket 1 is used for a portion where high bonding strength is required, such as a connection between columns and beams forming the skeleton of a building. FIG. 2 is an explanatory view of a usage example of the mounting bracket 1, and shows a case where the beam H is mounted on the pillar V.
In this example, the metal fitting 5 is attached to the pillar V, and the metal fittings 5 are connected to each other by supporting the shaft member attached to the beam H. Further, in this embodiment, as a shaft member having a rod-shaped shaft portion 6 supported by the metal fitting 5, a bolt 9 having a screw portion 7 at the tip and a hexagonal columnar head 8 at the other end is used. However, it may be formed in another form as long as it is in line with the gist of the present invention.

Then, as metal fittings for attaching the connecting pin (bolt 9) which is a shaft member to wood, mounting metal fittings 1 (1a, 1b) are attached to both side surfaces of the beam H, respectively. For mounting each mounting bracket 1, a counterbore portion 10 is formed on the surface of wood to be a mounting portion. The counterbore portion 10 is a dent formed at a predetermined depth from the surface of the wood.
The internal shape of the counterbore portion 10 is formed to be substantially the same as the outer shape of the mounting bracket 1, so that the mounting bracket 1 fits snugly. It is desirable that the depth of the counterbore portion 10 is formed slightly deeper than the height of the outer peripheral surface of the mounting bracket 1.

In the present embodiment, the outer peripheral shape of the mounting bracket 1 is formed as a low bottomed cylindrical body having a height of about 12 mm, which is about the same as the diameter of the bolt 9, and the inner surface shape of the counterbore portion 10 is the mounting bracket 1. It is formed as a cylindrical recess according to the outer peripheral shape of. If the outer peripheral shape of the mounting bracket 1 is a square cylinder shape, the inner surface shape of the counterbore portion 10 is also formed into a square cylinder shape, and the mounting bracket 1 is embedded so as to be fitted.
Further, the bottom surface 11 of the counterbore portion 10 is formed in a flat shape so that the entire bottom wall 3 of the mounting bracket 1 can be contacted.
Further, a through hole 12 penetrating the wood is formed in the center of the bottom surface 11 of the counterbore portion 10. In other words, counterbore portions 10 are formed at both ends of the through hole 12.

To attach the bolt 9 to the beam H, the threaded portion 7 at the tip is projected from the insertion side of the bolt 9 via the mounting bracket 1b, the counterbore portion 10, the through hole 12, the counterbore portion 10, and the mounting bracket 1a, and the nut is attached to this. This is done by screwing 13.
In the example shown in FIG. 2, a slit 14 is formed in the load direction acting on the bolt 9, and the bolt 9 is passed through the slit 14 so as to cross the inside of the slit 14. Further, a through hole 16 is provided in the upper part of the through hole 12 through which the bolt 9 is inserted, and a drift pin 15 which is a metal rod body is attached. The drift pin 15 is a metal pin having a diameter of 12 mm made of strong iron or stainless steel, penetrates through the slit 14 and engages with a predetermined portion of the receiving metal fitting 5.

When the shaft portion 6 of the bolt is inserted into and fixed to the pair of mounting brackets 1a and 1b housed in the counterbore 10 as described above, the shaft portion 6 and the mounting brackets 1a and 1b that come into contact with the through hole 12 of the bolt 9 are inserted. The load acting on the bolt 9 is supported by the entire wood (beam H) through the counterbore portion 10 in contact with the bolt 9.
When the beam H is attached to the pillar V, the beam H is supported by suspending the drift pin 15 and the bolt 9 on the receiving plate 17 of the receiving metal fitting 5 fixed to the pillar V.

In order to carry out the suspension as described above, a slit 14 formed in a portion having a predetermined depth from the center of the end surface of the beam H so as to be wide enough to fit the receiving metal fitting 5 in the vertical direction is provided. There is. The receiving plate 17 of the receiving metal fitting 5 is provided with a groove 18 and a hole 19 which are opened upward. The groove 18 has a width sufficient to accommodate the drift pin 15, and receives and supports the drift pin 15 inserted through the beam H. The hole 19 has a diameter sufficient to allow the shaft portion 6 of the bolt 9 to be inserted, and supports the shaft portion 6 of the bolt 9 inserted through the beam H.

When attaching the beam H to the column V, only the drift pin 15 is attached to the beam H in advance. Since the drift pin 15 is a type of pin that is driven and fixed to wood, it can be fixed without the need for an instrument.
When the drift pin 15 is driven in, it penetrates the inside of the slit 14. Therefore, when the slit 14 is fitted so as to cover the receiving plate 17 of the receiving metal fitting 5 from above, the drift pin 15 enters the groove 18 of the receiving plate 17 and enters the groove 18. It is supported by the bottom edge of the. That is, the beam H is placed on the receiving metal fitting 5 of the pillar V via the drift pin 15. As a result, the beam H is supported by the pillar V without being dropped.

After the beam H is supported by the drift pin 15, the bolt 9 is inserted into the through hole 12 of the beam H and the hole 19 of the metal fitting 5 to fix the beam H. FIG. 3 shows an external view in a state where the bolt 9 is fixed by the mounting brackets 1a and 1b, and a cross section (BB cross section) of the portion where the bolt 9 is attached.
As shown in the figure, both ends of the bolt 9 are supported by the mounting brackets 1a and 1b, and a load such as the weight of the beam H acts on both ends of the bolt 9 via the mounting brackets 1a and 1b. Further, the receiving metal fitting 5 supports the middle of the shaft portion 6 of the bolt 9 where the load of the beam H is concentrated inside the slit 14, whereby the beam H is attached to the pillar V.

When supporting the load of the beam H, if the load is supported only by the shaft member without providing the mounting brackets 1a and 1b, the contact area between the beam H (inside the through hole 12) and the shaft member is small, so that the shear acting on the beam H is applied. The stress is locally high. In other words, it is an image of supporting a large load by a thin tangent line in which the shaft portion 6 and the through hole 12 come into contact with each other.
On the other hand, since the mounting brackets 1a and 1b can be in contact with the wood as a wide surface instead of being in local contact with the wood as in the shaft portion 6, the shear stress acting on the contact portion with the beam H is reduced. .. Lower shear stress means more load to be supported, which means more strength against load.

In order to reduce the shear stress on the wood, the contact area may be increased by thickening the shaft member or the like that supports the wood. However, making the shaft member thicker means that the amount of wood scraped increases. As the amount of wood scraped increases, the strength of the wood itself decreases, so it is desirable to minimize the amount of wood scraped. From this point of view, a minimum number of counterbore portions is provided at both ends of the bolt 9, and mounting brackets 1a and 1b that come into contact with the inner surface of the counterbore are provided.

FIG. 4 is another example of use of the mounting brackets 1a and 1b and the shaft member, and shows a case where two square timbers K1 and K2 are overlapped and assembled as one strong timber. Although FIG. 4 shows only a part of the square timbers K1 and K2 for the sake of explanation, the square timbers K1 and K2 are long square timbers extending over several meters, and the mounting brackets 1a and 1a are provided at a plurality of locations in the longitudinal direction. A fastening portion using 1b is provided.
When two long square timbers are overlapped and fixed to make one square timber, the same through holes and counterbore as described above are formed on both of the overlapping square timbers K1 and K2, respectively, and the mounting bracket is used. 1a and 1b are attached, and a bolt 9 serving as a shaft member is inserted and fixed with a nut 13. When inserting this bolt, a flat washer 20 and a spring washer 21 are also used together if necessary. By doing so, it is possible to reinforce the seating surfaces of the mounting brackets 1a and 1b with the flat washers 20 and prevent the spring washers 21 from loosening after tightening.

Further, the fastening points using the mounting brackets 1a and 1b and the bolts 9 for the square timbers K1 and K2 are provided at a plurality of places in the longitudinal direction.
When such fastening points are provided at a plurality of places, the force acting on the directions H1 and H2 that bond the square timbers K1 and K2 to each other acts strongly to bring them into close contact with each other. At the same time, the force for preventing the displacement in the V1 and V2 directions acting between the square timbers K1 and K2 becomes stronger, and the strength against twisting also increases. Since the counterforce against the load generated in the V1 and V2 directions acting like a shearing force is mainly received by the outer peripheral surfaces of the mounting brackets 1a and 1b, it is compared with the case of fastening only with a shaft member such as a small diameter bolt. Therefore, high strength can be exhibited by performing the fastening method using the mounting brackets 1a and 1b.

(Other Example 1)
5A and 5B are explanatory views of a mounting bracket 25 of another form, FIG. 5A shows an external perspective view, and FIG. 5B is a cross section in the CC line direction shown in FIG. 5A. The figure is shown.
The mounting bracket 25 is erected over the entire outer edge of the bottom wall (bottom wall portion) 27 having a hole (hole portion) 26 penetrating the front and back in the center as in the mounting bracket 1 described above. It is a metal fitting having a low-height bottomed tubular shape having a side wall (side wall portion) 28.
Further, as an example, a steel plate having a wall thickness of 1.6 mm is punched out in a circular shape, and while forming a circular hole 2 in the center, the outer peripheral edge is bent and bent so as to form a continuous side wall 4 using a die. It was formed by raising it. As the material constituting the mounting bracket 1, it is preferable to use a strong metal material such as iron, steel plate, or stainless steel, and the wall thickness is appropriately set according to the required strength.

The mounting bracket 25 formed in this way forms a curved surface in which the bottom wall portion 27 is curved in the direction of projecting inward. This curved surface is a portion that bends when a bolt or nut is attached, and has the effect of making it difficult for the nut screwed into the bolt to loosen due to an effect like a spring washer. Therefore, in the example shown in FIG. 4, if the mounting bracket 25 is used instead of the mounting bracket 1, the spring washer 21 becomes unnecessary. Further, the flat washer 20 becomes unnecessary when the fastening strength may be low or when the strength is increased by increasing the thickness of the bottom wall portion 27 or the like.

(Other Example 2)
In each of the above examples, the case where the bolt is attached by using the mounting bracket 1 has been described, but it is also possible to use other than the bolt.
FIG. 6 is an explanatory view in the case where a solid pin (hereinafter referred to as “connecting pin”) 30 which is not threaded with respect to the mounting bracket 1 is attached by a pair of mounting brackets 1 (25).
As shown in FIG. 6A, the connecting pin 30 is, for example, a rod-shaped body formed in a cylinder having a diameter of 12 mm, and is made of iron, stainless steel, or other steel material. A pair of grooves 31 and 31 are formed in a portion of the connecting pin 30 slightly from the end to the center in a direction orthogonal to the longitudinal direction so as to leave a predetermined width of the central portion. Further, it has a wedge body 33 having a pair of bifurcated insertion portions 32, 32 that engage with the pair of grooves 31, 31.

The attachment of the connecting pin 30 is the same as the example shown in FIG. 2 and the like, and is attached to the wood in the state shown in FIG. 6 (b). FIG. 6B is a diagram in which the wood to be mounted is omitted, but the seating portion 10 and the through hole 12 are formed in the wood to mount the mounting bracket 1. After both ends of the connecting pin 30 are projected from the holes 2 in the center of the mounting bracket 1 (25), a pair of bifurcated wedges 33 are inserted into the pair of grooves 31 and 31 formed near both ends of the connecting pin 30. When the portions 32 and 32 are driven in, the mounting bracket 1 (25) and the connecting pin 30 are fixed.

FIG. 7 shows a cross-sectional view when the connecting pin 30 is attached to wood (beam H described above) by using the mounting bracket 25.
In order to fix the connecting pin 30 by the grooves 31 and 31 and the wedge body 33, the length of the through hole excluding the depth of the counterbore plus the wall thickness of the low wall of the mounting brackets 25 at both ends is added. And the distance between the grooves 31 formed at both ends of the connecting pin 30 is formed to be substantially equal. When the mounting bracket 25 is used, the low wall is curved, so that when the wedge body 33 is driven in, the low wall bends while maintaining elasticity. In this case, a force acting so as to be sandwiched between the mounting bracket 25 and the connecting pin 30 acts on the wedge body 33, so that the wedge is in a well-effective state and can be made difficult to come off.
The effect of the driven wedge body 33 can be strengthened by making the distance between the grooves 31 slightly shorter than the above.

(Other Example 3)
FIG. 8 is an explanatory view of another example of the connecting pin and the mounting bracket. The connecting pin 35 shown in FIG. 8 was formed not by a round bar but by a thin flat plate in the shape of an ice lolly stick.
A pair of grooves 36, 36 are formed in a portion slightly from the end to the center of the connecting pin 35 in a direction orthogonal to the longitudinal direction so as to leave a predetermined width of the central portion. A wedge body 38 having a pair of bifurcated insertion portions 37, 37 can be attached to the grooves 36, 36.

The mounting bracket 39 shown in FIG. 8 has substantially the same outer shape as the mounting bracket 1 or the mounting bracket 25 described above, but the hole 40 through which the connecting pin 35 is inserted is not a circular hole but a rectangular shape. Is different. This rectangular shape is formed to have an outer diameter that allows the connecting pin 35 to just penetrate.
The connecting pin 35 is fixed by mounting the wedge body 38 in the grooves 36, 36 of the connecting pin 35 inserted into the hole 40 of the mounting bracket 39.

(Other Example 4)
FIG. 9 represents another embodiment of the connecting pin. In the connecting pin 41 shown in the figure, the shaft portion 42 is a cylindrical round bar body, and both end portions 43 are formed in a flat plate shape. The usage of the connecting pin 41 is the same as that of the fourth embodiment described above, and it can be used together with the mounting bracket 39 having the rectangular hole 40 and fixed by the wedge body 38.
Since the connecting pin 41 has a round bar shape instead of the flat shaft portion of the fourth embodiment, the load can be received without deforming the shaft portion even when the load amount acting on the shaft portion is large. It is possible.

(Other Example 5)
10 (a) and 10 (b) show the connecting pin 45 according to another embodiment, and FIG. 10 (c) shows the external view of the mounting bracket 50 used for the connecting pin 45. In the connecting pin 45 shown in FIG. 10A, the shaft portion 46 is formed as a columnar round bar, the tip 47 is formed in a flat plate shape, and the male screw portion 48 is formed on the outer periphery of the base end portion. .. Further, a groove 49 that can be fitted with the wedge body 33 and the wedge body 38 described above is formed at the boundary portion between the shaft portion 46 and the tip 47.
The above-mentioned mounting bracket 39 and other mounting bracket 50 are used for mounting the connecting pin 45. The mounting bracket 50 is formed with a female screw portion 51 that can be screwed with the male screw portion 48 formed at the base end portion, and the male screw portion 48 of the connecting pin 45 is screwed into the female screw portion 51 of the mounting bracket 50. This makes it possible to combine the two. The portion of the mounting bracket 50 that forms the female thread portion 51 is formed as a nut 51 that is integrally coupled with the mounting bracket 50. The nut 51 may be formed separately from the mounting bracket 50.

When attaching the connecting pin 45 to the wood, the above-mentioned counterbore and through hole are formed in advance on the wood. A connecting pin 45 attached to the mounting bracket 50 is inserted into the counterbore and the through hole from one side of the through hole, and the tip 47 portion of the connecting pin 45, which is the other end, is inserted into the above-mentioned mounting bracket 39 and the wedge body. The 33 or the wedge body 38 is fitted.
It goes without saying that the examples described above can be appropriately combined within the scope of the claims, and the present invention is not limited to the above examples.

The present invention can be used for connecting timbers constituting buildings such as buildings.

1 (1a, 1b) Mounting bracket 2 holes (holes)
3 Bottom wall (bottom wall)
4 Side wall (side wall)
5 Receiving bracket 6 Shaft 7 Threaded 8 Head 9 Bolt 10 Seating 11 Bottom surface 12 Through hole 13 Nut 14 Slit 15 Drift pin 16 Through hole 17 Receiving plate 18 Groove 19 Hole 20 Flat washer 21 Spring washer 25 Mounting bracket 26 hole (Hole)
27 Bottom wall (bottom wall)
28 Side wall (side wall)
30 Connecting pin 31 Groove 32 Inserting part 33 Wedge body 35 Connecting pin 36 Groove 37 Inserting part 38 Wedge body 39 Mounting bracket 40 Hole 41 Connecting pin 42 Shaft part 43 Both ends 45 Connecting pin 46 Shaft part 47 Tip 48 Male thread part 49 Groove 50 Mounting bracket 51 Female thread

Claims (6)

It has a circular bottom wall portion with holes penetrating the front and back in the center and a side wall portion erected over the entire outer edge of the bottom wall portion.
By configuring the bottom wall portion as a curved surface protruding inward and inserting or screwing a connecting pin having a rod-shaped shaft portion into the hole portion, all or one of the loads acting on the connecting pin. A mounting bracket for a washer-shaped connecting pin, wherein the portion is formed so as to be supportable via the side wall portion. The mounting bracket according to claim 1, wherein the bottom wall portion is formed in a disk shape, and the side wall portion is formed by a bent portion in which the outer peripheral edge of the bottom wall portion is bent at a substantially right angle. The mounting bracket according to claim 1 or 2, wherein a nut is provided in the hole. A washer-shaped mounting bracket having a circular bottom wall portion having holes penetrating the front and back in the center and a side wall portion erected over the entire outer edge of the bottom wall portion.
A connecting pin having a rod-shaped shaft that can be inserted or screwed into the hole,
It has a fixing means for fixing the end of the connecting pin to the bottom wall.
A wood connecting metal fitting characterized in that the bottom wall portion of the mounting metal fitting is configured as a curved surface protruding inward . A washer-like structure having a disk-shaped curved surface protruding inward, a bottom wall portion having a hole portion penetrating the front and back in the center, and a side wall portion erected over the entire outer edge of the bottom wall portion. Mounting bracket and
A connecting pin having a rod-shaped shaft that can be inserted or screwed into the hole,
It has a fixing means for fixing the end of the connecting pin to the bottom wall.
A through hole through which the connecting pin is inserted is formed in wood, and recesses into which the mounting bracket can be inserted are formed at both ends of the through hole.
A method for connecting wood, characterized in that both ends of a connecting pin inserted through the through hole are fixed via mounting brackets fitted into recesses formed at both ends of the through hole. It is a building that has multiple columns and multiple beams made of timber connected to each other as a skeleton.
As a means of connecting all or part of the wood to each other, it is configured as a disk-shaped curved surface that protrudes inward, and at the bottom wall portion that has a hole that penetrates the front and back in the center and the entire outer edge of the bottom wall portion. A washer-shaped mounting bracket with a side wall that is erected over
A connecting pin having a rod-shaped shaft that can be inserted or screwed into the hole,
A connecting means including a fixing means for fixing the end of the connecting pin to the bottom wall portion is provided.
A through hole through which the connecting pin is inserted is formed in wood, and recesses into which the mounting bracket can be inserted are formed at both ends of the through hole.
A building characterized in that both ends of a connecting pin inserted into the through hole are fixed via mounting brackets fitted into recesses formed at both ends of the through hole.