JP7552075B2 - Joint structure, column-beam joint structure, and construction method of joint structure - Google Patents

Description

The present invention relates to a joint structure, a column-beam joint structure, and a construction method for the joint structure.

A column-beam joint structure is known in which the columns and beams are made of multiple layers of overlapping wooden boards, forming joints without using steel plates such as gusset plates (see, for example, Patent Document 1). In the column-beam joint structure of Patent Document 1, the joints between the columns and beams are a mixture of beam-dominated and column-dominated areas, and the glued-in rod (GIR) method is used to join the members (wooden boards) at the column-dominated areas, in which a steel rod is inserted into the joint of the wood and fixed with adhesive. Another method of joining members is the notched joint method, in which a notch is formed in both members to allow them to fit together.

JP 2019-203321 A

However, the GIR method requires complicated processing and steps, such as drilling holes and filling with adhesive, and there is a risk that performance may vary significantly depending on the adhesive filling conditions, etc.

In addition, when using the half-cutting method, when cutting the components to form the notch, due to the influence of machining precision, it was necessary to form the notch slightly larger than the design value in order to ensure that the two components would fit together securely. This raised the risk of gaps occurring when the components were joined together, reducing the precision of the joint.

The present invention was made in consideration of these circumstances, and aims to simplify joining and improve accuracy.

In order to achieve this object, the joint structure of the present invention is a joint structure for a column and a beam, in which a first member having a longitudinal direction in a first direction and a second member having a longitudinal direction in a second direction intersecting the first direction are joined at a predetermined joint, the first member having a first base layer member disposed on one side in a third direction intersecting the first and second directions, and a first laminated member laminated on the other side in the third direction of the first base layer member, the first laminated member having a first separated portion formed at the joint and spaced apart in the first direction, and the second member having a first base layer member disposed on the other side in the third direction. and a second laminate member stacked on one side of the second base member in the third direction and having a second separation portion spaced apart in the second direction at the joint, wherein the second base member is fitted into the first separation portion of the first laminate member and the first base member is fitted into the second separation portion of the second laminate member, the first base member and the second base member are stacked in the third direction to form the joint, and each member of the joint structure is joined not with an adhesive but with a binder, drift pin, or bolt.

With this type of joining structure, the two members (first member, second member) are each made into a laminated structure, so that the cutout portions (first separation portion, second separation portion) can be easily and accurately formed. In addition, compared to joining using the GIR method, processing is simpler. This simplifies joining and improves precision.

In such a joint structure, it is desirable that the fiber direction of the first base layer member and the first laminate member is along the first direction, and the fiber direction of the second base layer member and the second laminate member is along the second direction.

This type of joint structure can increase the strength and rigidity of each component in the longitudinal direction, and can also increase the strength and rigidity of the joints.

In order to achieve this objective, the column-beam joint structure of the present invention is characterized in that a column having the first member described above is joined to a beam having the second member.

This type of column-beam joint structure simplifies the joining of columns and beams and improves their accuracy.

In such a column-beam joint structure, the joint structure may be configured by stacking multiple layers in the third direction.

This type of column-beam joint structure simplifies the joining of columns and beams and improves their accuracy.

Such a column-beam joint structure may include a third member whose longitudinal direction is the first direction, and a fourth member whose longitudinal direction is the second direction and divides the third member in the first direction, and a pair of the joint structures may be provided on both sides of the third direction sandwiching the third member and the fourth member.

This type of column-beam joint structure can simplify and improve the accuracy of joining columns and beams. It can also increase the strength and rigidity of the joints between columns and beams.

In order to achieve this object, the construction method of the joint structure of the present invention is characterized by having the steps of stacking and fixing the first base layer member of the first member and the second base layer member of the second member in the third direction at the joint, fixing the first laminated member to the other side of the first base layer member in the third direction while abutting against the second base layer member, and fixing the second laminated member to the one side of the second base layer member in the third direction while abutting against the first base layer member.

This method of constructing a joint structure allows the joint structure to be formed easily and accurately.

In order to achieve this objective, the construction method of the joint structure of the present invention is characterized by having the steps of arranging the second laminated members of the second member on both sides of the first base member of the first member in the second direction, sandwiching the first base member, fixing the second base member to the other side of the first base member and the second laminated member in the third direction while abutting the second laminated member against the first base member, and fixing the first laminated member to the other side of the first base member in the third direction while abutting it against the second base member.

This method of constructing a joint structure makes it easier and more accurate to form the joint structure.

The present invention makes it possible to simplify joining and improve accuracy.

FIG. 2 is a perspective view showing a column-beam joint structure according to the first embodiment. FIG. 2 is an exploded perspective view of the joining unit 40. 3A to 3C are explanatory diagrams showing an example of a method for installing the joint unit 40. FIG. 4A to 4D are explanatory diagrams showing modified examples of the method of installing the joint unit 40. FIG. 5A to 5C are explanatory diagrams showing another modified example of the method of installing the joint unit 40. FIG. FIG. 6 is a perspective view showing a column-beam joint structure according to a second embodiment. FIG. 11 is a perspective view showing a column-beam joint structure of a comparative example. FIG. 2 is an exploded perspective view showing the configuration of a column-beam joint structure of a comparative example. 1 is a perspective view showing a joint structure with an intervening beam 200 joined between beams 120 provided on adjacent columns 110. FIG.

First Embodiment
Hereinafter, a column-beam joint structure using the joint structure according to the present invention will be described with reference to the drawings. Before describing this embodiment, a comparative example will be described first.

Comparative Example
FIG. 7 is a perspective view showing a column-beam joint structure of a comparative example. FIG. 8 is an exploded perspective view showing the configuration of the column-beam joint structure of the comparative example. In this comparative example, as shown in the figure, an X direction, a Y direction, and a Z direction perpendicular to each other are defined. The Z direction is the up-down direction (i.e., the direction along the vertical direction) when the column is erected vertically. Hereinafter, the Z direction is also referred to as the up-down direction. The X direction and the Y direction are directions perpendicular to the up-down direction (horizontal directions). Here, the stacking direction of the wooden boards constituting the column-beam joint structure is defined as the Y direction, and the horizontal direction perpendicular to the Y direction (and the Z direction) is defined as the X direction.

As shown in Figures 7 and 8, the column 110 and beam 120 joined by the column-beam joint structure of the comparative example have a roughly rectangular cross section, and are made of three laminated wooden boards made of lumber, laminated lumber, LVL, etc., and are integrated by a binding material 130 penetrating in the stacking direction (Y direction). Note that in the drawings, only a portion of the binding material 130 is shown, since showing all of the binding materials that bind the stacked wooden boards and all of the binding materials that join the column and beam would make the drawings unclear.

In this comparative example, the wooden board located in the middle of the three wooden boards that make up the column 110 is referred to as the column inner wooden board 111, and the pair of wooden boards that sandwich the column inner wooden board 111 on both sides are referred to as the column outer wooden board 112. In addition, the wooden board located in the middle of the three wooden boards that make up the beam 120 is referred to as the beam inner wooden board 121, and the pair of wooden boards that sandwich the beam inner wooden board 121 on both sides are referred to as the beam outer wooden board 122.

The three wooden boards that make up the column 110 and the three wooden boards that make up the beam 120 are laminated veneer materials made by laminating and gluing multiple veneers together, and each wooden board is mainly made of LVL that is laminated with the grain direction aligned (specifically, with the exception of the wooden board 121 inside the beam). In addition, the wooden board 121 inside the beam is made of plywood that is laminated with the grain direction crossed at right angles.

The wooden boards (lumber) that make up the columns 110 and beams 120 are known to be highly anisotropic materials, with high strength and rigidity in the direction of the fibers and low strength and rigidity in directions other than the direction of the fibers. In Figures 7 and 8, the fiber direction of each wooden board is indicated by an arrow on the surface of each wooden board.

The column 110 has an inner column wood board 111 and a pair of outer column wood boards 112, and the fibers of both the inner column wood board 111 and the pair of outer column wood boards 112 run in the vertical direction (Z direction).

The beam 120 has an inner beam wooden board 121 and a pair of outer beam wooden boards 122.

As mentioned above, the wooden boards 121 on the inside of the beams are made of plywood made by laminating and gluing multiple veneers with their fiber directions perpendicular to each other, and have a mixture of fibers aligned along the longitudinal direction (here, the X direction) and fibers aligned perpendicular to the longitudinal direction (here, the Z direction). The ratio of fibers aligned along the vertical direction (Z direction) is approximately 50%.

The pair of beam outer wood boards 122 have their fibers oriented along the longitudinal direction of the beam 120 (here, the X direction), and one end face cut into a rectangular shape is abutted against the side of the column outer wood board 112. The beam outer wood board 122 and the column outer wood board 112 are joined by a steel rod 140 that runs along the longitudinal direction (X direction) of the beam 120 and spans between the beam outer wood board 122 and the column outer wood board 112.

To join the two beam outer wood boards 122 separated by the column outer wood board 112, beam openings 122a are provided along the X direction from the end face on the column 110 side, and the column outer wood board 112 has column openings 112a along the X direction that penetrate the column outer wood board 112.

The beam opening 122a and the column opening 112a are provided in a position that will connect when the column outer wooden board 112 and the beam outer wooden board 122 are joined. The steel rod 140 is placed across the beam opening 122a and the column opening 112a and is bonded with adhesive. This joining method in which a steel rod or the like is inserted into the joint of the wood and fixed with adhesive is called the GIR method.

The beam-inside wooden board 121 is provided between a pair of column-outside wooden boards 112 and a pair of beam-outside wooden boards 122. The beam-inside wooden board 121 is stacked in the stacking direction (Y direction) with the two beam-outside wooden boards 122 joined to both sides of the column-outside wooden board 112, and is joined to the column-outside wooden board 112 and the two beam-outside wooden boards 122 by a fastening material 130.

At the end of the beam 120, a pair of beam outer wooden boards 122 protrude outward (away from the column 110) from the beam inner wooden boards 121. The protruding portion of the beam outer wooden boards 122 has a through hole 122c that penetrates in the thickness direction (here, the Y direction).

As shown in FIG. 8, the column-inside wooden board 111 is divided into upper and lower parts by the beam-inside wooden board 121. These upper and lower column-inside wooden boards 111 are both stacked in the stacking direction (Y direction) with the column-outside wooden board 112, and the lower surface of the upper column-inside wooden board 111 is abutted against the upper surface of the beam-inside wooden board 121, and the upper surface of the lower column-inside wooden board 111 is abutted against the lower surface of the beam-inside wooden board 121, and they are joined to the pair of column-outside wooden boards 112 by the fasteners 130.

According to the column-beam joint structure of this comparative example, at the joint between the column 110 and the beam 120, there is a mixture of areas where the column 110 divides the beam 120 (so-called column-first joint) and areas where the beam 120 divides the column 110 (so-called beam-first joint). This results in high initial rigidity and less residual deformation. It is therefore possible to provide a column-beam joint structure with high joint strength and rigidity.

In addition, the fiber direction of the column-inside wood board 111 and about half (about 50%) of the fiber direction of the beam-inside wood board 121 that divides the column-inside wood board 111 are in the same direction. For this reason, the bending moment of the beam 120 is likely to act as a support pressure on the divided portion of the column-inside wood board 111 from the divided beam-inside wood board 121 in the longitudinal direction (fiber direction) of the column 110, making it less likely that damage will occur, such as the end of the beam 120 sinking into the column 110. In addition, since the area on which the support pressure from the beam-inside wood board 121 acts is the entire width of the column 110, it is possible to ensure a wider area on which the support pressure acts.

In this example, plywood is used as the wooden board 121 on the inside of the beam, but it is not limited to plywood. For example, LVL (with the fiber direction aligned in the vertical direction), LVB, LVLB types, and stacked LVL (LVL laminate) may be used. In these cases, the ratio of fiber direction aligned in the vertical direction is preferably 15 to 100%. This makes it easier for the bending moment of the beam 120 to act as a support pressure from the wooden board 121 on the inside of the beam in the fiber direction of the column 110, compared to when all fiber directions are aligned in the longitudinal direction (X direction) of the wooden board 121 on the inside of the beam. It also increases the strength and rigidity of the column 110 against vertical loads.

The beam-inside wooden board 121 of the beam 120 divides the column-inside wooden board 111, with the underside of the upper column-inside wooden board 111 abutting the upper side of the beam-inside wooden board 121 and the upper side of the lower column-inside wooden board 111 abutting the lower side of the beam-inside wooden board 121. Therefore, the joint between the column 110 and the beam 120 has high initial rigidity and is less likely to have residual deformation. Furthermore, the pair of column-outside wooden boards 112 sandwiching the column-inside wooden board 111 have the same fiber direction as the column-inside wooden board 111, so it is possible to ensure high strength for the column 110. Therefore, it is possible to create a column-beam joint structure with high strength and rigidity at the joint.

Figure 9 is a perspective view showing the joint structure with the spaced beam 200 that is joined between the beams 120 provided on adjacent columns 110.

The columns 110 to which the beams 120 are joined by the column-beam joint structure are provided at appropriate intervals. When the intervals between the columns 110 are large (wide), spaced beams 200 are joined between the beams 120 joined to the adjacent columns 110, as shown in FIG. 9. The spaced beam 200 has a spaced beam inner wooden board 221 whose fiber direction runs along the longitudinal direction of the spaced beam 200, and a pair of spaced beam outer wooden boards 222 that sandwich the spaced beam inner wooden board 221 from both sides and whose fiber direction runs along the longitudinal direction of the spaced beam 200.

As shown in FIG. 9, in the spaced beam 200, the spaced beam inner wooden board 221 protrudes outward in the longitudinal direction beyond a pair of spaced beam outer wooden boards 222. In this protruding portion, a penetration hole 221c for inserting the binding material 130 is formed at a position overlapping in the Y direction with the penetration hole 122c of the beam outer wooden board 122.

The beam 120 and the interposed beam 200 are joined by inserting the fastening material 130 into the penetration holes 122c and 221c, with the protruding portion of the interposed beam inner wooden board 221 sandwiched between the protruding portions of the pair of beam outer wooden boards 122 of the beam 120 on both sides.

In this way, by bridging the space between the adjacent columns 110, it is possible to widen the space between the adjacent columns 110. In this example, the end (protruding portion) of the spaced beam inner wooden board 221 is sandwiched from both sides by the protruding portions of the pair of beam outer wooden boards 122 of the beam 120 and joined by the binding material 130, but this is not limited to the above, and the relationship of the unevenness of the beam end may be reversed. That is, the pair of spaced beam outer wooden boards 222 may protrude outward from the spaced beam inner wooden boards 221, and the beam inner wooden board 121 may protrude outward from the pair of beam outer wooden boards 122. Then, the protruding portions of the pair of spaced beam outer wooden boards 222 may be sandwiched from both sides by the protruding portions of the beam inner wooden boards 121 and joined by a binding material or the like.

Also, if no intervening beams are used (when the ends of the beams 120 are joined together), the ends of adjacent beams 120 may be joined using a fastening material or the like with a splice material (not shown) placed (inserted) in the space formed when the ends of the beams 120 are butted together (the space formed by a pair of opposing column outer wooden boards 112 and beam inner wooden boards 121).

In the comparative example described above, the beam outer wooden board 122 and the column outer wooden board 112 are joined by the GIR method using a steel rod 140. However, this type of GIR method has the problem that the processing and steps, such as forming holes (column opening 112a, beam opening 122a) and filling with adhesive, are complicated. In addition, there is a risk that performance will vary significantly depending on the adhesive filling condition.

In addition, a known method for joining two components is the notch joining method, in which notches are formed in both components to allow the two components to join together. However, when the notches are formed by cutting wood, the processing precision has a large effect, and there is a risk that the precision of the joint will decrease (resulting in rattling, etc.).

Therefore, this embodiment aims to simplify and improve the accuracy of joining components (wooden boards) in a column-beam joint structure.

<<Present embodiment>>
FIG. 1 is a perspective view showing a column-beam joint structure according to the first embodiment.

The column-beam joint structure of this embodiment constitutes the joint (joint) between the columns and beams of a building. In this embodiment, the target building is a wooden building, and the column-beam joint structure is made of wooden members. As in the comparative example, this embodiment also defines three mutually orthogonal directions (X direction, Y direction, and Z direction). That is, the Z direction (up-down direction) is the direction along the vertical direction, and the X and Y directions are directions perpendicular to the vertical direction (horizontal directions). The Y direction is the stacking direction of the wooden boards that constitute the column-beam joint structure, and the X direction is the direction perpendicular to the Y and Z directions.

As shown in FIG. 1, the column-beam joint structure of this embodiment is a cross-shaped joint between a column 10 aligned along the Z direction (corresponding to the first direction) and a beam 20 aligned along the X direction (corresponding to the second direction). As in the comparative example (FIG. 7), the column 10 and the beam 20 have a substantially rectangular cross section, and three (three sets) of plank-shaped wooden boards such as lumber, laminated lumber, and LVL are stacked in the Y direction (corresponding to the third direction), with a binding material 30 penetrating in the stacking direction (Y direction) to integrate them. Note that in the drawing, as in the comparative example, only a portion of the binding material 30 is shown.

In this embodiment, the wooden board located in the middle of the three sets of wooden boards that make up the column 10 is referred to as the column inner wooden board 11, and the pair of wooden boards that sandwich the column inner wooden board 11 on both sides are referred to as the column outer wooden boards 12, 12'. Also, the wooden board located in the middle of the three sets of wooden boards that make up the beam 20 is referred to as the beam inner wooden board 21, and the pair of wooden boards that sandwich the beam inner wooden board 21 on both sides are referred to as the beam outer wooden boards 22, 22'.

Of the three sets of wooden boards that make up the column 10 and the three sets of wooden boards that make up the beam 20, the middle (inner) column inner wooden board 11 and beam inner wooden board 21 have the same configuration as the column inner wooden board 111 and beam inner wooden board 121 of the comparative example, respectively. Therefore, a description thereof will be omitted. In this embodiment, the column inner wooden board 11 corresponds to the third member, and the beam inner wooden board 21 corresponds to the fourth member that divides the column inner wooden board 11 in the Z direction (up and down). With this configuration, the strength and rigidity of the joint between the column 10 and the beam 20 can be increased, as in the comparative example.

In this embodiment, as shown in FIG. 1, a column outer wooden board 12 (corresponding to a first member) with a longitudinal direction in the Z direction and a beam outer wooden board 22 (corresponding to a second member) with a longitudinal direction in the X direction are joined at the intersection (corresponding to a joint) between the column 10 and the beam 20. The structure in which the column outer wooden board 12 and the beam outer wooden board 22 are joined is called a joint unit 40 (corresponding to a joint structure). The column outer wooden board 12' and the beam outer wooden board 22' also form a joint unit 40. Then, joint units 40 are arranged on both sides of the column inner wooden board 11 and the beam inner wooden board 21, and they are joined by the binding material 30 to form the column-beam joint structure shown in FIG. 1.

The joint unit 40 between the column outer wood board 12' and the beam outer wood board 22' is the inverted joint unit 40 between the column outer wood board 12 and the beam outer wood board 22, and has the same configuration. Therefore, the joint unit 40 between the column outer wood board 12 and the beam outer wood board 22 will be described below.

<Configuration of Joining Unit 40 (Joining Structure)>
Fig. 2 is an exploded perspective view of the joining unit 40. Here, as shown in Fig. 2, one side and the other side are defined in the Y direction (the direction in which the members are stacked). Specifically, the front side of the paper surface is defined as one side, and the back side of the paper surface is defined as the other side.

The joint unit 40 is a joint in which the column outer wood board 12, whose longitudinal direction is the Z direction, and the beam outer wood board 22, whose longitudinal direction is the X direction, are joined so as to cross (in a cross shape) at the joint. In this embodiment, LVL is used for each member (each layer) constituting the column outer wood board 12 and the beam outer wood board 22, and the fiber direction is along the longitudinal direction of each (see Figures 1 and 2). That is, the fiber direction of the column outer wood board 12 is along the Z direction, and the fiber direction of the beam outer wood board 22 is along the X direction. This can increase the strength and rigidity of each member in the longitudinal direction. In addition, at the joint between the column outer wood board 12 and the beam outer wood board 22, as described later, the column outer wood board 12 and the beam outer wood board 22 are laminated with half the thickness, so that the ratio of the fiber direction along the Z direction (up and down direction) is about 50%. This can increase the strength and rigidity at the joint.

As shown in Figures 1 and 2, the column outer wooden board 12 of this embodiment has a column base member 12a (corresponding to the first base member) and a column laminate member 12b (corresponding to the first laminate member). The thicknesses of the column base member 12a and the column laminate member 12b are each half the thickness of the column outer wooden board 12 (in other words, the thickness of the joint unit 40).

The column base member 12a is a plate-shaped member that constitutes half the thickness of the column outer wooden board 12 and is arranged on one side of the column outer wooden board 12 in the Y direction.

The column laminate member 12b is laminated on the other side of the column base member 12a in the Y direction. However, the column laminate member 12b is not provided at the joint with the beam outer wood board 22 (the joint between the column 10 and the beam 20). As a result, the column laminate member 12b has a column side separation portion 12b' (corresponding to the first separation portion) that is separated in the Z direction.

As shown in Figs. 1 and 2, the beam outer wooden board 22 has a beam base member 22a (corresponding to the second base member) and a beam laminate member 22b (corresponding to the second laminate member). The thicknesses of the beam base member 22a and the beam laminate member 22b are each half the thickness of the beam outer wooden board 22 (in other words, the thickness of the joint unit 40).

The beam base member 22a is a plate-shaped member that constitutes half the thickness of the beam outer wooden board 22 and is arranged on the other side of the beam outer wooden board 22 in the Y direction.

The beam laminated member 22b is laminated on one side of the beam base member 22a in the Y direction. However, the beam laminated member 22b is not provided at the joint with the column outer wood board material 12 (the joint between the column 10 and the beam 20). As a result, the beam laminated member 22b has a beam side separation portion 22b' (corresponding to a second separation portion) that is separated in the X direction.

Then, the beam base member 22a of the beam outside wood board 22 is fitted to the column side separation portion 12b' of the column laminate member 12b of the column outside wood board 12, and the column base member 12a of the column outside wood board 12 is fitted to the beam side separation portion 22b' of the beam laminate member 22b of the beam outside wood board 22. As a result, the column base member 12a and the beam base member 22a are stacked in the Y direction to form a joint. With this configuration, it is possible to transmit a moment between the two members (the column outside wood board 12 and the beam outside wood board 22).

In the joint unit 40 of this embodiment, compared to the joint structure using the GIR method of the comparative example, there is no need to process holes (column opening 112a, beam opening 122a) or fill the holes with adhesive, and the column outer wooden board 12 and beam outer wooden board 22 can be easily joined without using steel rods.

In addition, if the notches (corresponding to the column-side separation section 12b' and the beam-side separation section 22b') are formed by cutting wood, the processing accuracy will have a large effect, and in order to reliably join (fit) the components together, the notches must be formed slightly larger than the design value. This raises the risk of gaps occurring when the components are joined together, making it difficult to improve the precision of the joint.

In contrast, in this embodiment, the column outer wooden board 12 and the beam outer wooden board 22 each have a two-layer laminated structure, so the separation sections (column side separation section 12b', beam side separation section 22b') can be easily formed with high precision without cutting wood (see the construction method described below). This improves the precision of the joint and suppresses rattling, etc.

<Method of Installing Joint Unit 40>
3A to 3C are explanatory diagrams showing an example of a method for installing the joint unit 40. FIG.

First, a column base member 12a and a pair of column laminate members 12b formed to a predetermined size are prepared, and as shown in FIG. 3A, a pair of column laminate members 12b are joined (fixed) using adhesive at a predetermined position on one side of the column base member 12a. As a result, as shown in FIG. 3B, the column laminate member 12b is laminated on the column base member 12a, and a column outer wood board 12 with a column side separation portion 12b' is formed between the pair of column laminate members 12b. At this time, the column side separation portion 12b' is formed according to the arrangement of the pair of column laminate members 12b, so that the position and length of the column side separation portion 12b' are easily adjusted. In addition, the concave depth of the separation portion 12b' in the column outer wood board 12 is determined by the thickness of the column laminate member 12b. Therefore, compared to the case where a notch portion (separation portion 12b') is formed by cutting wood, processing is simple and can be formed with high precision.

Although not shown, in the same manner as in FIG. 3A, the beam base member 22b is joined (fixed) to the beam laminate member 22a, and a beam outer side wooden board 22 is formed with a beam side separation portion 22b' between the beam laminate members 22b.

Then, as shown in FIG. 3B, adhesive is applied to the column base member 12a at the column side separation portion 12b' of the column outer wood board 12, and the column outer wood board 12 and the beam outer wood board 22 are combined. That is, the beam base member 22a is joined to the column side separation portion 12b' of the column laminate member 12b, and the column base member 12a is joined to the beam side separation portion 22b' of the beam laminate member 22b. As a result, the column base member 12a and the beam base member 22a are laminated at the joint, and as shown in FIG. 3C, a joint unit 40 is formed in which the column outer wood board 12 and the beam outer wood board 22 are joined.

This construction method allows the members to be joined more easily than in the comparative example (GIR method). Also, compared to cutting wood to form the notches (column-side separation section 12b', beam-side separation section 22b'), the joint unit 40 can be formed more easily and with higher precision.

Figures 4A to 4D are explanatory diagrams showing modified examples of the construction method of the joint unit 40.

In this example, first, as shown in FIG. 4A, adhesive is applied to the entire surface of one side of the column base member 12a, and as shown in FIG. 4B, the beam base member 22a is arranged (stacked) so as to cross at the joint. Furthermore, as shown in FIG. 4C, the column laminate member 12b is arranged (stacked) in a pair on the column base member 12a while butting against the beam base member 22a. Also, as shown in FIG. 4D, a pair of beam laminate members 22b is arranged (stacked) on the beam base member 22a using adhesive. At this time, each pair of beam laminate members 22b is butted against the column base member 12a. When stacking the beam laminate member 22b on the beam base member 22a, the member in the state of FIG. 4C may be turned over. As a result, a joint unit 40 in which the column outer wood board 12 and the beam outer wood board 22 are joined is formed. In this modified example, the separation sections (column-side separation section 12b' and beam-side separation section 22b') are automatically formed (there is no need to prepare them in advance), so the joint unit 40 can be formed more easily and accurately.

Figures 5A to 5C are explanatory diagrams showing another modified example of the construction method of the joint unit 40.

In this example, first, as shown in FIG. 5A, the beam laminate members 22b are arranged side by side on both sides of the column base member 12a, and adhesive is applied to the entire surface of one side.

Next, while a pair of beam laminated members 22b are butted against the column base member 12a, the beam base member 22a is placed on top of the column base member 12a and the beam laminated member 22b (the other side in the y direction in FIG. 2) as shown in FIG. 5B. This joins (fixes) the beam base member 22a and the beam laminated member 22b to form the beam outer wood board 22.

As shown in FIG. 5C, the column laminated member 12b is placed in pair on top of the column base member 12a (the other side in the y direction in FIG. 2) while being butted against the beam base member 22a. This forms the column outer wooden board 12 in which the column base member 12a and the column laminated member 12b are laminated, and also forms the joint unit 40 in which the column outer wooden board 12 and the beam outer wooden board 22 are joined.

In this modified example, the joining unit 40 can be formed more easily and accurately.

Second Embodiment
Fig. 6 is a perspective view showing a column-beam joint structure according to the second embodiment. Note that the same components as those in the first embodiment (Fig. 1) are given the same reference numerals and the description thereof will be omitted.

The column-beam joint structure of the second embodiment is obtained by removing the column-inside wooden board 11 and the beam-inside wooden board 21 of the first embodiment, and stacking (stacking) two joint units 40 in the y direction.

In this type of beam-column joint structure, it is possible to simplify the joint and improve the accuracy, as in the first embodiment. However, in the case of this beam-column joint structure, the joining method shown in FIG. 9 cannot be used to join the beam ends, so the joints must be joined using the GIR method or a method such as fixing with drift pins via a metal joining member (such as a steel plate).

In the second embodiment, two joint units 40 are stacked (laminated) in the Y direction to form a column-beam joint structure, but this is not limited to this. For example, three or more may be stacked. Also, a column-beam joint structure may be formed with only one joint unit 40. In other words, the thickness of each layer constituting the column outer wood board 12 and the beam outer wood board 22 may be doubled from that in FIG. 6, and a column-beam joint structure of the same thickness as that in FIG. 6 may be formed with one joint unit 40.

===Other embodiments===
The above-mentioned embodiment is for the purpose of facilitating understanding of the present invention, and is not intended to limit the present invention. The present invention can be modified or improved without departing from the spirit of the present invention, and it goes without saying that the present invention includes equivalents thereof.

In the above embodiment, LVL was used for each member that constitutes the joint unit 40, but this is not limited to this. For example, plywood may also be used. Even in this case, it is possible to transmit a moment between two members and to resist forces in two directions.

In addition, in the above-described embodiment, the components of the joining unit 40 were joined (fixed) with adhesive, but this is not limited thereto, and they may be joined, for example, with binding material, drift pins, bolts, etc.

10 Pillar, 11 Pillar inner wooden board (third member),
12, 12': Column outer wooden board (first member),
12a: column base member (first base member), 12b: column laminate member (first laminate member),
12b' pillar side spaced portion (first spaced portion),
20 Beam, 21 Beam inner wooden board (fourth member),
22, 22' Beam outer wooden board (second member),
22a beam base member (second base member), 22b beam laminate member (second laminate member),
22b' Beam side separation part (second separation part),
30 binding material, 40 joint unit (joint structure),
110 Column, 111 Column inner wood board material,
112 Column outer wood board material, 112a Column hole,
120 Beam, 121 Beam inner wood board material,
122 beam outer wooden board, 122a beam hole, 122c penetration hole,
130 binding material, 140 steel rods,
200 Interposed beams,
221: Wooden board inside the spacer beam; 221c: Penetration hole;
222 Intermediate beam outer wood board material

Claims (7)

It is a structure with pillars and beams joined together.
A joint structure in which a first member having a longitudinal direction in a first direction and a second member having a longitudinal direction in a second direction intersecting the first direction are joined at a predetermined joint,
The first member is
a first base member disposed on one side of a third direction intersecting the first direction and the second direction;
a first laminated member that is laminated on the other side of the first base layer member in the third direction and has a first separated portion formed at the joint portion that is separated in the first direction;
having
The second member is
A second base layer member disposed on the other side in the third direction;
a second laminated member laminated on the one side of the second base layer member in the third direction and having a second separated portion formed at the joint portion so as to be separated in the second direction;
having
the second base layer member is fitted into the first spaced portion of the first laminated member, the first base layer member is fitted into the second spaced portion of the second laminated member, and the first base layer member and the second base layer member are laminated in the third direction to form the joint portion,
Each member of the joint structure is not joined by adhesive but by a binder, drift pin, or bolt.
A joining structure characterized by: The joint structure according to claim 1,
The fiber direction of the first base layer member and the first laminated member is along the first direction,
The fiber direction of the second base layer member and the second laminated member is along the second direction.
A joining structure characterized by: A column-beam joint structure characterized in that a column having the first member described in claim 1 or claim 2 is joined to a beam having the second member. The column-beam joint structure according to claim 3,
The joining structure is configured by stacking a plurality of the joining structures in the third direction.
A column-beam joint structure characterized by: The column-beam joint structure according to claim 3,
A third member having a longitudinal direction in the first direction;
a fourth member having a longitudinal direction in the second direction and dividing the third member in the first direction;
Equipped with
A pair of the joining structures is provided on both sides in the third direction between the third member and the fourth member.
A column-beam joint structure characterized by: A method for constructing the joint structure according to claim 1 or 2,
a step of overlapping and fixing the first base layer member of the first member and the second base layer member of the second member in the third direction at the joint portion;
a step of fixing the first laminated member to the second base layer member while abutting the first laminated member against the second base layer member on the other side of the first base layer member in the third direction;
a step of fixing the second laminated member to the first base layer member while abutting the second laminated member against the first base layer member on the one side in the third direction of the second base layer member;
A construction method for a joint structure comprising the steps of: A method for constructing the joint structure according to claim 1 or 2,
a step of disposing the second laminated members of the second member on both sides of the first base layer member of the first member in the second direction;
a step of fixing the second base layer member to the other side of the first base layer member and the second laminated member in the third direction while abutting the second laminated member against the first base layer member;
a step of fixing the first laminated member to the second base layer member while abutting the first laminated member against the second base layer member on the other side of the first base layer member in the third direction;
A construction method for a joint structure comprising the steps of:

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