JP2023161813A - Junction structure and structure body - Google Patents

Abstract

To achieve a highly rigid and highly strong structure body while reducing amount of wood.SOLUTION: A junction structure comprises: a first member 10 having a pair of first junctions on lateral faces on both sides in a width direction; a second member 20 having a second junction connected to one first junction; and a third member 30 having a third junction connected to the other first junction. The first junction has a first convex part 11 having a first recess and a first concave part. The second junction has a second convex part 31 fitting to the first concave part and having a second recess and a second concave part fitting to the first convex part 11. The third junction has a third convex part fitting to the first concave part and having a third recess and a third concave part fitting to the first convex part 11. The junction structure has a first engaging member to be disposed in a first hole formed of the first recess and the second recess and a second engaging member to be disposed in a second hole formed of the first recess and the third recess. The second member and the third member are connected respectively at an angle with the first member.SELECTED DRAWING: Figure 1

Description

The present invention relates to a joining structure and a structure.

When high rigidity and strength are required for wooden structures (columns, beams, etc.), they are often made to have a large cross section. For example, Patent Document 1 discloses that wooden boards are joined together (increased in cross section) and applied to columns, beams, and the like.

Japanese Patent Application Publication No. 2015-145154

By increasing the cross-section, the amount of wood used will increase. By the way, as will be described later, if the plates are joined at an angle to each other, the amount of wood can be reduced without significantly affecting the rigidity and strength. However, when joining plate materials using hardware (for example, L-shaped hardware), the screws that attach the hardware may have low strength and rigidity. In addition, the presence of hardware impairs the texture of the wood, which is not desirable in terms of design. Furthermore, when bonding with an adhesive, there are concerns such as destruction of the adhesive interface and deterioration of the adhesive.

The present invention has been made in view of such problems, and its purpose is to realize a structure with high rigidity and high strength while reducing the amount of wood.

The main invention for achieving the above object includes a first member having a pair of first joints on both sides in the width direction, and a second member having a second joint joined to one of the first joints. and a third member having a third joint joined to the other first joint, the first joint having a first convex portion having a first recess and a first recess. and the second joint portion has a second convex portion that engages with the first concave portion and includes a second concave portion, and a second concave portion that engages with the first convex portion. , the third joint portion has a third convex portion that engages with the first concave portion and includes a third concave portion, and a third concave portion that engages with the first convex portion; a first engagement member that is disposed in a first hole formed by the first protrusion and the second recess, and prevents separation of the first protrusion and the second protrusion that are adjacent to each other through engagement; a second engagement that is disposed in a second hole formed by the first recess and the third recess, and that prevents separation between the adjacent first and third protrusions through engagement; The joining structure is characterized in that the second member and the third member are each joined at an angle to the first member.

Other features of the present invention will become apparent from the description of this specification and the accompanying drawings.

According to the present invention, a structure with high rigidity and high strength can be realized while reducing the amount of wood.

FIG. 1 is a schematic perspective view showing a structure 1 of this embodiment. FIG. 2 is an exploded perspective view of FIG. 1; FIG. 3 is a perspective view of a joint portion between the first member 10 and the second member 20. FIG. FIG. 4 is an exploded perspective view of FIG. 3; FIG. 3 is a perspective view of a joint portion between the first member 10 and the third member 30. FIG. 6 is an exploded perspective view of FIG. 5. FIG. 7A to 7C are diagrams showing examples of joining wooden plugs. It is a schematic perspective view which shows the structure 1' of a modification. It is a figure which shows the comparison of the performance by cross-sectional shape.

At least the following matters will become clear from this specification and the accompanying drawings.

a first member having a pair of first joints on both sides in the width direction; a second member having a second joint joined to one of the first joints; and a second member having a second joint joined to the other first joint. a third member having a third joint part to be joined, the first joint part having a first convex part having a first recessed part, and a first recess part, and the second joint part having a first concave part; has a second convex portion that engages with the first concave portion and includes a second concave portion, and a second concave portion that engages with the first convex portion; A third convex portion that engages with the concave portion and includes a third concave portion, and a third concave portion that engages with the first convex portion, and is formed by the first concave portion and the second concave portion. a first engagement member that is disposed in a first hole and prevents separation between the first protrusion and the second protrusion that are adjacent to each other through engagement; and the first recess and the third recess. and a second engaging member disposed in a second hole formed by the first convex portion and the third convex portion that are adjacent to each other by engagement, the second engaging member and a joining structure, wherein the third member is joined to the first member at an angle.

According to such a joining structure, a structure with high rigidity and high strength can be realized while reducing the amount of wood.

In such a joining structure, the angle may be a right angle.

According to such a joining structure, processing and joining of each member is easy.

In this joining structure, the first protrusion protrudes in the width direction, the second protrusion and the third protrusion protrude in a direction orthogonal to the width direction, and the first engagement member and It is desirable that the second engagement member is arranged along at least one of the width direction and the orthogonal direction.

According to such a joining structure, the first to third members can be joined at right angles to each other.

In such a joining structure, the angle may be an acute angle.

According to such a joint structure, high rigidity and strength can be achieved even if the amount of wood is reduced.

In such a joint structure, an end of the second member opposite to the second joint and an end of the third member opposite to the third joint may be joined. desirable.

According to such a joining structure, a closed cross section (a triangular prism structure having a hollow portion) can be formed only by the first to third members.

Furthermore, a structure characterized by being provided with any of the bonding structures described above becomes clear.

According to such a structure, high rigidity and high strength can be achieved while reducing the amount of wood.

It is desirable that such a structure has a hollow portion formed therein.

According to such a structure, rigidity and strength can be further increased.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

===This embodiment===
<About structure 1>
FIG. 1 is a schematic perspective view showing a structure 1 of this embodiment, and FIG. 2 is an exploded perspective view of FIG. 1. Further, FIG. 3 is a perspective view of a joint portion between the first member 10 and the second member 20, and FIG. 4 is an exploded perspective view of FIG. 3. Further, FIG. 5 is a perspective view of a joint portion between the first member 10 and the third member 30, and FIG. 6 is an exploded perspective view of FIG. In this embodiment, as shown in the figure, three mutually orthogonal directions (X direction, Y direction, and Z direction) are defined. The Z direction is a vertical direction (vertical direction), and the upper side in the vertical direction is defined as "upper", and the lower side in the vertical direction is defined as "lower". Further, the X direction and the Y direction are horizontal directions. In this embodiment, the X direction corresponds to the width direction of the first member 10, and the Y direction corresponds to the orthogonal direction.

The structure 1 of this embodiment includes a joining structure for joining wooden board members (first member 10, second member 20, and third member 30) to each other. Further, wooden plugs 40, 50 are used at the joints of each member. In this embodiment, the structure 1 is a wooden pillar, and is erected along the Z direction (vertical direction).

<About the first member 10>
The first member 10 is a substantially rectangular wooden board (for example, CLT (Cross Laminated Timber)), and its longitudinal direction is along the Z direction, its width direction is along the X direction, and its thickness direction is along the Y direction. It is located in Further, as shown in FIG. 2, the first member 10 includes a joint portion for joining the main body portion 10a constituting the main body with other members (here, the second member 20 and the third member 30). 10b.

A pair of joint parts 10b (corresponding to the first joint part) are provided on both sides of the main body part 10a in the width direction (X direction). Each of the pair of joint portions 10b has a plurality of convex portions 11 and a plurality of concave portions 12. The convex portions 11 and the concave portions 12 are arranged alternately in the Z direction.

The convex portion 11 (corresponding to the first convex portion) protrudes outward (outside in the X direction) from the main body portion 10a. The convex portion 11 has a substantially rectangular shape in plan view (when viewed in the Y direction). Further, as shown in FIG. 2 and the like, the convex portion 11 includes a recessed portion 13 and a recessed portion 14 on both sides in the Z direction.

The recessed portion 13 is provided along the thickness direction (here, the Y direction) of the first member 10 (convex portion 11). The recessed portion 13 is formed by cutting out the convex portion 11 in a semicircular shape, and is therefore recessed inside the convex portion 11 in a semicircular shape. In the convex portion 11, the recessed portion 13 is continuously provided from one end to the other end in the Y direction.

The recessed portion 14 is provided along the width direction (here, the X direction) of the first member 10. Further, the recessed portion 14 intersects with the recessed portion 13. The recess 14 is also formed by cutting out the protrusion 11 in a semicircular shape, and is therefore recessed inside the protrusion 11 in a semicircular shape.

Note that one of the recessed portion 13 and the recessed portion 14 (herein referred to as the recessed portion 13) corresponds to a first recessed portion.

The recess 12 (corresponding to the first recess) is a space provided between adjacent projections 11, and has approximately the same shape as the projection 11 (approximately rectangular in plan view).

<About the second member 20>
The second member 20 is a plate material similar to the first member 10, and is arranged so that its longitudinal direction is along the Z direction, its width direction is along the Y direction, and its thickness direction is along the X direction. That is, the second member 20 has an angle of 90 degrees with respect to the first member 10 (the angle between the second member 20 and the first member 10 is a right angle). Further, as shown in FIG. 2, the second member 20 includes a main body portion 20a constituting the main body and a joint portion 20b for joining with another member (here, the first member 10). There is.

The joint portion 20b (corresponding to a second joint portion) is provided on one side surface of the main body portion 20a in the width direction (Y direction). The joint portion 20b has a plurality of protrusions 21 and a plurality of recesses 22. The convex portions 21 and the concave portions 22 are arranged alternately in the Z direction.

The convex portion 21 (corresponding to the second convex portion) protrudes outward (towards the Y direction) from the main body portion 20a. The convex portion 21 has a substantially rectangular shape in plan view (when viewed in the X direction). Further, as shown in FIGS. 2, 4, etc., the convex portion 21 includes a recess 23 and a recess 24 on both sides in the Z direction.

The recessed portion 23 is provided along the width direction (here, the Y direction) of the second member 20. The recess 23 is formed by cutting out the protrusion 21 in a semicircular shape, and is therefore recessed inside the protrusion 21 in a semicircular shape. In the convex portion 21, the recessed portion 23 is continuously provided from one end to the other end in the Y direction. Note that the recess 23 is provided to face the recess 13 (first recess) of the first member 10, and corresponds to a second recess.

The recessed portion 24 is provided along the thickness direction (here, the X direction) of the second member 20. Further, the recessed portion 24 intersects with the recessed portion 23. The recess 24 is also formed by cutting out the protrusion 21 in a semicircular shape, and is therefore recessed inside the protrusion 21 in a semicircular shape. Note that the recess 24 is provided to face the recess 14 of the first member 10 .

The recess 22 (corresponding to the second recess) is a space provided between adjacent projections 21 and has approximately the same shape as the projection 21 (approximately rectangular in plan view).

<About the third member 30>
The third member 30 is a plate material similar to the first member 10 and the second member 20, and is arranged so that its longitudinal direction is along the Z direction, its width direction is along the Y direction, and its thickness direction is along the X direction. There is. That is, the third member 30 is parallel to the second member 20 and has an angle of 90 degrees with respect to the first member 10 (the angle between the third member 30 and the first member 10 is a right angle). Further, as shown in FIG. 2, the third member 30 includes a main body portion 30a constituting the main body and a joint portion 30b for joining with another member (here, the first member 10). There is.

The joint portion 30b (corresponding to the third joint portion) is provided on one side surface of the main body portion 30a in the width direction (Y direction). The joint portion 30b has a plurality of convex portions 31 and a plurality of concave portions 32. The convex portions 31 and the concave portions 32 are arranged alternately in the Z direction.

The convex portion 31 (corresponding to the third convex portion) protrudes outward (towards the Y direction) from the main body portion 30a. The convex portion 31 has a substantially rectangular shape in plan view (when viewed in the X direction). Further, as shown in FIGS. 2, 6, etc., the convex portion 31 includes a recessed portion 33 and a recessed portion 34 on both sides in the Z direction.

The recessed portion 33 is provided along the width direction (here, the Y direction) of the third member 30. The recess 33 is formed by cutting out the protrusion 31 in a semicircular shape, and is therefore recessed inside the protrusion 31 in a semicircular shape. In the convex portion 31, the recessed portion 33 is continuously provided from one end to the other end in the Y direction. Note that the recess 33 is provided so as to face the recess 13 (first recess) of the first member 10, and corresponds to a third recess.

The recessed portion 34 is provided along the thickness direction (here, the X direction) of the third member 30. Further, the recessed portion 34 intersects with the recessed portion 33. The recess 34 is also formed by cutting out the protrusion 31 in a semicircular shape, and is therefore recessed inside the protrusion 31 in a semicircular shape.

The recess 32 (corresponding to the third recess) is a space provided between adjacent projections 31 and has almost the same shape as the projection 31 (approximately rectangular in plan view).

<About wooden plugs 40 and 50>
The wooden plug 40 is inserted (arranged) along the Y direction into the hole H1 (see FIG. 3) formed by the recess 13 of the first member 10 and the recess 23 of the second member 20, and Separation (separation in the X direction) between the matching convex portions 11 and 21 is prevented by engagement.

Further, the wooden plug 40 is inserted into the hole H3 (see FIG. 5) formed by the recess 13 of the first member 10 and the recess 33 of the third member 30 along the Y direction, and Separation between the convex portions 11 and 31 (separation in the X direction) is prevented by engagement.

Note that the hole H1 is a circular hole formed by the hollow part 13 and the hollow part 23, and the hole H3 is a circular hole formed by the hollow part 13 and the hollow part 33 (a hole with the same shape as the hole H1). It is. For this reason, the wooden stopper 40 is a member having a circular cross section (cylindrical shape) so as to fit properly into the holes H1 and H3. In this embodiment, the hole H1 corresponds to a first hole, and the wooden plug 40 arranged in the hole H1 corresponds to a first engagement member. Further, the hole H3 corresponds to a second hole, and the wooden plug 40 arranged in the hole H3 corresponds to a second engagement member.

The wooden plug 50 is inserted along the X direction into the hole H2 (see FIG. 3) formed by the recess 14 of the first member 10 and the recess 24 of the second member 20, and is inserted into the adjacent convex part. 11 and the convex portion 21 (separation in the Y direction) is prevented by engagement.

Furthermore, the wooden plug 50 is inserted along the X direction into the hole H4 (see FIG. 5) formed by the recess 14 of the first member 10 and the recess 34 of the third member 30, and Separation between the convex portions 11 and 31 (separation in the Y direction) is prevented by engagement.

Note that the hole H2 is a circular hole formed by the hollow part 14 and the hollow part 24, and the hole H4 is a circular hole formed by the hollow part 14 and the hollow part 34 (a hole with the same shape as the hole H2). It is. Further, the lengths of the holes H2 and H4 (the lengths in the X direction) are shorter than the lengths of the holes H1 and H3 (the lengths in the Y direction). For this reason, the wooden plug 50 is a member that is shorter in length than the wooden plug 40 and has a circular (cylindrical) cross section so as to fit properly into the holes H2 and H4.

Further, as described above, the recess 14 intersects with the recess 13, and the recess 24 intersects with the recess 23. Therefore, the hole H2 formed by the hollow part 14 and the hollow part 24 communicates with the hole H1 formed by the hollow part 13 and the hollow part 23. Therefore, it is possible to bring the wooden plug 40 inserted into the hole H1 and the wooden plug 50 inserted into the hole H2 into contact.

Furthermore, the recess 14 intersects with the recess 13 , and the recess 34 intersects with the recess 33 . Therefore, the hole H4 formed by the recess 14 and the recess 34 communicates with the hole H3 formed by the recess 13 and the recess 33. Therefore, it is possible to bring the wooden plug 40 inserted into the hole H3 and the wooden plug 50 inserted into the hole H4 into contact.

<About the method of forming the joint>
Next, an example of a method for forming a joint portion will be described. Note that here, a method for forming the joint portion 10b of the first member 10 will be described.

First, prepare the first member 10 before processing (in a state in which the joint portion 10b is not formed), and drill a circular hole in advance at a predetermined position in the longitudinal direction (position corresponding to the recessed portions 13 and 14). Open accurately. Specifically, for the recessed part 13, a hole (a through hole in this embodiment) is made along the thickness direction of the first member 10, and for the recessed part 14, a hole is made so as to intersect with the hole (at the above-mentioned predetermined position). ) Drill a hole along the width direction.

Then, by using an automatic processing machine or the like, a concavo-convex process is performed, and the parts other than the convex parts 11 (that is, the parts of the concave parts 12) are removed. At this time, cut across the hole drilled with the above-mentioned drill, etc., leaving half (a semicircle) in the convex part. As a result, a convex portion 11 having semicircular concave portions (concave portions 13 and 14) in two directions and a joint portion 10b having a concave portion 12 are formed.

Note that the forming method is the same for the joint portion 20b of the second member 20 and the joint portion 30b of the third member, so the description thereof will be omitted.

In this embodiment, since the angles formed by each member (plate material) are right angles, there is no need for diagonal processing. Therefore, processing and joining of each member (each joint portion) is easy.

<About joining each member>
First, as shown in FIG. 4, while the first member 10 and the second member 20 form an angle of 90 degrees, one joint 10b of the first member 10 and the joint 20b of the second member 20 bring together. That is, the protrusion 11 of the joint 10b is fitted into the recess 22 of the joint 20b, and the protrusion 21 of the joint 20b is fitted into the recess 12 of the joint 10b.

At this time, a circular hole H1 along the thickness direction (here, the Y direction) of the first member 10 is formed by the recess 13 of the projection 11 and the recess 23 of the projection 21. Furthermore, the recess 14 of the convex portion 11 and the recess 24 of the convex portion 21 form a circular hole H2 that communicates with the hole H1 along the width direction of the first member 10 (here, the X direction).

Then, the wooden plug 40 is inserted into the formed hole H1. Furthermore, the wooden plug 50 is inserted into the hole H2 and brought into contact with the wooden plug 40. The wooden plugs 40 and 50 are similarly inserted (arranged) into all the holes H1 and H2 of the joint portions 10b and 20b. Thereby, the joint portion 10b and the joint portion 20b are joined.

Next, the first member 10 and the third member 30 are joined in the same manner. That is, as shown in FIG. 6, while the first member 10 and the third member 30 form an angle of 90 degrees, the other joint 10b of the first member 10 and the joint 30b of the third member 30 are connected. Bring together. That is, the protrusion 11 of the joint 10b is fitted into the recess 32 of the joint 30b, and the protrusion 31 of the joint 30b is fitted into the recess 12 of the joint 10b.

At this time, a circular hole H3 along the thickness direction (here, the Y direction) of the first member 10 is formed by the recessed part 13 of the convex part 11 and the recessed part 33 of the convex part 31. Furthermore, the recess 14 of the convex portion 11 and the recess 34 of the convex portion 31 form a circular hole H4 that communicates with the hole H3 along the width direction of the first member 10 (here, the X direction).

Then, the wooden plug 40 is inserted into the formed hole H3. Furthermore, the wooden plug 50 is inserted into the hole H4 and brought into contact with the wooden plug 40. The wooden plugs 40 and 50 are similarly inserted (arranged) into all the holes H and H4 of the joint portion 10b and the joint portion 30b. Thereby, the joint portion 10b and the joint portion 30b are joined.

Thereby, the first member 10, the second member 20, the third member 30, the wooden plug 40, and the wooden plug 50 are integrated to form the structure 1.

Here, if only one of the wooden plug 40 and the wooden plug 50 is provided at one joint (for example, the joint of the first member 10 and the second member 20) (only one of the holes H1 and H2 is provided). (if only one is formed), there is a risk that the member may not be properly prevented from coming off.

Specifically, when only the hole H1 is formed at the joint between the first member 10 and the second member 20, when the wooden plug 40 is inserted (placed) into the hole H1 along the Y direction, the first member 10 (convex portion 11) and the second member 20 (convex portion 21) become difficult to come off in the X direction. However, in the axial direction (Y direction) of the wooden plug 40, it is easy to come off (there is a possibility that it will come off). In this way, the member can be properly prevented from falling off in the direction perpendicular to the insertion direction of the wooden plug (the axial direction of the wooden plug), but it cannot be properly prevented from falling off in the insertion direction. There is a risk.

In contrast, in this embodiment, a hole H1 (H3) along the Y direction and a hole H2 (H4) along the X direction are provided in one joint, and the wooden plug 40 and the wooden plug 50 are respectively provided. The wooden plug 40 and the wooden plug 50 are brought into contact with each other by insertion (arrangement). Thereby, it is possible to properly prevent the film from falling off in both the X direction and the Y direction, so that it is possible to securely prevent the film from falling off.

In addition, by joining the wooden plug 40 and the wooden plug 50, it is possible to prevent the plug from coming off more reliably.

7A to 7C are diagrams showing examples of joining wooden plugs. Note that in FIGS. 7A to 7C, illustrations other than the wooden plug are omitted (only the wooden plug is shown).

In FIG. 7A, the contact portions of the wooden stopper 40 and the wooden stopper 50 are bonded together using an adhesive or the like. This makes it possible to more reliably prevent it from coming off. It also prevents the wooden plug from falling.

In FIG. 7B, wooden plugs 40' and 50' are used. The diameter of the wooden plug 40' is larger than that of the wooden plug 50', and a hole 41 slightly smaller than the diameter of the wooden plug 50' is formed on the side surface. A wooden plug 50' (tip portion) is press-fitted into this hole 41 using a hammer or the like. Thereby, the wooden plug 40' and the wooden plug 50' are joined.

Furthermore, in FIG. 7C, wooden plugs 40'' and 50'' are used. The wooden plug 40'' has a larger diameter than the wooden plug 50'', and has a screw hole 42 (female screw) formed on the side surface. Further, the wooden stopper 50'' has a threaded portion 52 (male thread) formed at its tip that corresponds to the screw hole 42 of the wooden stopper 40''. By screwing the threaded portion 52 of this wooden plug 50'' into the screw hole 42 of the wooden plug 40'', the wooden plug 40'' and the wooden plug 50'' are joined. In addition, in this embodiment, the threaded part 52 is formed only at the tip of the wooden plug 50', but this is not limited, and for example, it may be provided over the entire length of the wooden plug 50'.

<Modified example>
FIG. 8 is a schematic perspective view showing a modified structure 1'. The structure 1' includes a first member 10, a second member 20', and a third member 30'. Further, in this modification, two first members 10 are used.

The second member 20' has (a pair of) joint parts 20b with the first member 10 (joint parts 10b) on both sides in the width direction (Y direction).

Similarly, the third member 30' has (a pair of) joint parts 30b with the first member 10 (joint parts 10b) on both sides in the width direction (Y direction).

Then, the structure 1' is formed by joining the two first members 10, the second member 20', and the third member 30' in a rectangular shape as shown in the figure. Note that the joining (joining structure) of each member is the same as in the above-described embodiment, so a description thereof will be omitted. The structure 1' of this modification is a closed cross-section structure in which a hollow portion S is formed.

<About cross-sectional performance>
FIG. 9 is a diagram showing a comparison of performance depending on cross-sectional shape. Note that the unit of size (number) shown in the figure is mm.

Here, we will discuss a comparative example (full cross section) in which the square cross section is entirely made of wood, this embodiment (structure 1) with a U-shaped cross section (open cross section), and a square cross section (closed cross section). The cross-sectional area (A) and the moment of inertia (I) are calculated for each of the modified examples (structure 1') of the cross-section). Furthermore, for the structure 1, the moment of inertia of area (Ix) in the X-axis direction and the moment of inertia of area (Iy) in the Y-axis direction are calculated.

In addition, the numbers in parentheses under the cross-sectional area (A) and moment of inertia (I) in the figure represent the ratio (value when the comparative example is set to 1.0) with respect to the comparative example (full cross section). It shows.

In this embodiment (Structure 1), the cross-sectional area (A) is less than half (44%) of the comparative example, while the moment of inertia (Ix, Iy) is 60 to 70% of the comparative example. . In other words, even if the cross-sectional area is reduced by half or less, the moment of inertia of the cross-section does not become as small as the cross-sectional area (reduced by about 25 to 40%). Therefore, it can be said that it is possible to obtain high rigidity and strength with a small cross-sectional area.

Further, in the modified example (structure 1'), the cross-sectional area (A) is about half (55%) of the comparative example, whereas the moment of inertia (I) of the cross-sectional area is 80% of that of the comparative example. In other words, even if the cross-sectional area is reduced by about half, the moment of inertia of area is reduced by only 20%. Therefore, rigidity and strength can be further increased.

In this way, in this embodiment and the modified examples, it is possible to realize a structure with high rigidity and high strength while reducing the amount of wood. Additionally, since processing can be done using automatic processing machines, it has excellent workability, and is cheaper and less prone to deterioration than bonded structures that use hardware or adhesives.

===About other embodiments===
The embodiments described above are provided to facilitate understanding of the present invention, and are not intended to be interpreted as limiting the present invention. It goes without saying that the present invention may be modified and improved without departing from its spirit, and that the present invention includes equivalents thereof. In particular, even the embodiments described below are included in the present invention.

In the embodiment described above, the structure 1 (and structure 1') is a pillar, but the structure is not limited to this. For example, it may be a beam. That is, the Z direction may be a horizontal direction (the X direction or the Y direction may be a vertical direction). However, in this case, if the wooden plug (wood plug 40 or wooden plug 50) is placed on the lower side (downward) in the vertical direction, the wooden plug may fall off. Therefore, in this case, it is desirable to join the wooden plug 40 and the wooden plug 50 as shown in FIGS. 7A to 7C. This prevents it from falling off.

Further, in the above-described embodiment, the wooden plugs 40, 50 (and the holes H1 to H4) have a circular cross section, but the present invention is not limited to this. For example, the cross section may be rectangular (a rectangular shape with different lengths of adjacent sides), or the cross section may be square.

Further, in the embodiment described above, the angle between the second member 20 and the first member 10 and the angle between the third member 30 and the first member 10 were both right angles (the second member 20 and the first member 10 The three members 30 are joined at an angle of 90 degrees to the first member 10), but the present invention is not limited thereto.

For example, the angle between the second member 20 and the first member 10 and the angle between the third member 30 and the first member 10 may both be acute angles (greater than 0 degrees and smaller than 90 degrees). . In this case, the ends of each member are processed diagonally, and the same applies to the end of the second member 20 opposite to the joint 20b and the end of the third member 30 opposite to the joint 30b. A concavo-convex joint may be formed, and the ends thereof may be joined to form a triangular prism shape having a triangular cross section (closed cross section) and a hollow portion. In this case as well, it is possible to realize a structure with high rigidity and high strength while reducing the amount of wood.

Further, the angle between the second member 20 and the first member 10 and the angle between the third member 30 and the first member 10 may both be obtuse angles (an angle greater than 90 degrees and smaller than 180 degrees). . Even in this case, the rigidity and strength can be increased compared to the case where there is no angle.

Furthermore, in the above-described embodiment, each convex part is provided with two (two directions) recesses so as to intersect with each other, but the invention is not limited to this, and only one of the recesses may be provided (insertion of a wooden plug). (may be in just one direction). However, in the case of one direction, as mentioned above, it is easy to pull out in the insertion direction (axial direction) of the wooden plug, so for example, at the upper and lower sides of each convex part, (insertion direction) may be changed. Alternatively, the direction of the depressions may be changed for each protrusion arranged in the Z direction.

1 Structure 10 First member 10a Main body part 10b Joint part (first joint part)
11 Convex part (first convex part)
12 Recess (first recess)
13 Recessed part (first recessed part)
14 Recessed portion 20 Second member 20a Main body portion 20b Joint portion (second joint portion)
21 Convex portion (second convex portion)
22 Recess (second recess)
23 Recessed part (second recessed part)
24 Recessed portion 30 Third member 30a Main body portion 30b Joint portion (third joint portion)
31 Convex part (third convex part)
32 Recess (third recess)
33 Recessed part (third recessed part)
34 Hole 40 Wood plug 41 Hole 42 Screw hole 50 Wood plug 52 Thread H1 Hole (first hole)
H2 hole H3 hole (second hole)
H4 Hole S Hollow part

Claims (7)

a first member having a pair of first joints on both sides in the width direction;
a second member having a second joint part joined to one of the first joint parts;
a third member having a third joint joined to the other first joint;
Equipped with
The first joint portion has a first convex portion including a first recessed portion, and a first recessed portion,
The second joint portion includes a second convex portion that engages with the first concave portion and includes a second concave portion, and a second concave portion that engages with the first convex portion,
The third joint portion includes a third convex portion that engages with the first concave portion and includes a third concave portion, and a third concave portion that engages with the first convex portion,
a first engagement that is disposed in a first hole formed by the first recess and the second recess, and that prevents separation between the adjacent first and second protrusions through engagement; A joining member,
a second engagement that is disposed in a second hole formed by the first recess and the third recess, and that prevents separation between the adjacent first and third protrusions through engagement; A joining member,
Equipped with
the second member and the third member are each joined to the first member at an angle;
A joint structure characterized by: The joining structure according to claim 1,
the angle is a right angle;
A joint structure characterized by: The joining structure according to claim 2,
the first protrusion protrudes in the width direction;
The second convex portion and the third convex portion protrude in an orthogonal direction perpendicular to the width direction,
The first engaging member and the second engaging member are arranged along at least one of the width direction or the orthogonal direction,
A joint structure characterized by: The joining structure according to claim 1,
the angle is an acute angle;
A joint structure characterized by: The joining structure according to claim 4,
An end portion of the second member opposite to the second joint portion and an end portion of the third member opposite to the third joint portion are joined.
A joint structure characterized by: A structure comprising the joining structure according to any one of claims 1 to 5. The structure according to claim 6,
A hollow part is formed,
A structure characterized by:

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