JP7209543B2 - Joining member, and box-shaped building unit and building using the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to a strip-shaped joining member for joining two materials to be joined, and a box-shaped building unit and a building using the same.

A cross laminated timber (CLT) is a panel laminated and adhered so that the fiber directions of each layer are orthogonal to each other. Because CLT panels are cross-laminated, they have more stable strength than laminated lumber that has been used as building materials, are less likely to deform, have strength comparable to concrete, and have excellent heat insulation properties. Characteristic.

Conventionally, a housing structure using this CLT panel has been proposed. For example, Patent Literature 1 describes constructing a building by arranging two or more box-shaped panels such as CLT panels so as to be supported by their own weight and without using special connecting tools. In addition, Patent Document 1 also describes that a connecting tool such as a hinge may be used, or a convex portion or a concave portion may be provided on the joint surface.

In addition, as a joining structure of CLT panels, for example, in Patent Document 2, two or more CLT panels are extended so as to cross each other and rod-shaped large-diameter binding members and small-diameter binding members are embedded in the CLT panels, and an adhesive is used. are described.

Japanese Patent No. 6271061 JP 2018-9327 A

The building described in Patent Document 1 enables construction of a building without using a special connector, and uses a connector such as a hinge or provides a convex portion or a concave portion on the joint surface. However, basically, the arrangement of the CLT panels is devised so that they are supported by their own weight. not a thing

In addition, in the joint structure described in Patent Document 2, embedding holes are formed in the CLT panel, and rod-shaped large-diameter and small-diameter binding members are inserted into the embedding holes, but the CLT panel is quite heavy. Therefore, it is necessary to assemble using a crane, and it is very difficult to insert the fastening member inserted into the embedding hole of one CLT panel into the embedding hole of the other CLT panel.

Accordingly, the present invention provides a stripped joining member that can easily join two members to be joined such as a CLT panel, a box-shaped building unit using the same, and a building using the same. intended to

A joining member of the present invention is a shredded joining member for joining a first member to be joined and a second member to be joined, and is an opening formed in the first member to be joined, and a second member to be joined. and an opening formed in the second member to be joined, which widens inward from the joining surface of the first member to be joined. It is composed of a second member having a shape corresponding to the shape of the opening, and bolts and nuts to be tightened from the tightening surfaces, which are the outer surfaces of the first and second members sandwiching the joint surface between the first and second members. It is a thing.

When the stripped joining member of the present invention is inserted into the opening formed in the first member to be joined and the opening formed in the second member to be joined, the stripped joining member causes the first member to be joined and the second member to be joined. The materials to be joined are joined. In addition, when the fastening between the first and second materials to be bonded is weak, the first and second materials to be bonded are attracted to each other by tightening the bolts and nuts, and are tightened firmly. becomes possible.

Here, the joint member of the present invention includes a counterbore formed for embedding a bolt and nut in the tightening surface, and a lateral direction of the tightening surface so as to sandwich both side surfaces of the first member and the second member. It is desirable that the protective metal fitting has a washer portion that extends over the groove and is bent along the inner surface of the counterbore, and includes a protective metal fitting that is interposed between the bolt/nut and the counterbore. As a result, when the first member and the second member are tightened by the bolt and nut, the protective metal fittings sandwich both side surfaces of the first member and the second member, thereby preventing the first member and the second member from cracking. can do.

In addition, a plurality of counterbore portions are formed side by side in the longitudinal direction of the tightening surface, and a plurality of bolts and nuts are provided to tighten the first member and the second member at respective positions of the plurality of counterbore portions. It is desirable that the protective metal fitting has a connection portion that connects the washer portions corresponding to the plurality of counterbore portions. The first member and the second member are tightened by bolts and nuts at respective positions of a plurality of counterbore portions formed side by side in the longitudinal direction of the tightening surface, so that the first member and the second member are twisted. can be prevented. In addition, in the protective metal fitting, the washer portions corresponding to the plurality of counterbore portions are connected by the connecting portion, so that the plurality of bolts/nuts and the protective metal fitting are integrated to form the first member and the second member. Join.

The box-shaped building unit of the present invention is a box-shaped building unit formed by arranging CLT panels on each side of a rectangular parallelepiped and joining adjacent CLT panels with the joining member of the present invention, The orthogonal portion of each surface of the rectangular parallelepiped is such that the butt end surface or the end surface of the second CLT panel as the second member to be joined is the first The end face or end face of the CLT panel and the outer main face of the second CLT panel are butted so that they are flush with each other and joined by a joining member. Joining members were inserted into the opening formed in the CLT panel and the opening formed in the second CLT panel from the butt end surface or end surface of the first CLT panel and the outer main surface side of the second CLT panel. Structure.

According to the box-shaped building unit of the present invention, the CLT panels are arranged on each side of the rectangular parallelepiped, and when the adjacent CLT panels are joined together, the opening of the first CLT panel opening outward and the opening of the first CLT panel are joined together. When the joining member of the present invention is inserted into the openings of the two CLT panels, the first CLT panel and the second CLT panel are tightened and joined.

(1) A shredded joining member for joining a first member to be joined and a second member to be joined. A first member having a shape corresponding to the shape of the opening that expands toward the inside, and an opening formed in the second member to be joined, the opening having a shape that expands toward the inside from the joining surface of the first member to be joined. A joining member composed of a second member having a corresponding shape and bolts and nuts that are tightened from the tightening surfaces, which are the outer surfaces of the first member and the second member, sandwiching the joining surface of the first member and the second member. Accordingly, it is possible to easily join two members to be joined.

(2) a counterbore formed for embedding a bolt and nut in the tightening surface, and a counterbore extending in the lateral direction of the tightening surface so as to sandwich both side surfaces of the first member and the second member; The protective metal fitting has a washer portion that is bent along the inner surface, and includes the protective metal fitting interposed between the bolt/nut and the recessed portion. It is possible to prevent cracking of the first member and the second member when the members are tightened.

(3) A plurality of counterbore portions are formed side by side in the longitudinal direction of the tightening surface, and a plurality of bolts and nuts are provided to tighten the first member and the second member at respective positions of the plurality of counterbore portions. The protective fitting has a connection portion that connects the washer portions corresponding to the plurality of counterbore portions, thereby preventing the first member and the second member from being twisted, and furthermore, preventing the first member and the second member from being twisted. Since the first member and the second member are joined integrally with the protective fitting, the first member and the second member can be joined stably.

(4) The joint portion by the joint member is connected to the opening formed in the first CLT panel and the opening formed in the second CLT panel, and the joint member is connected to the end surface or end surface of the first CLT panel and the end surface of the first CLT panel. Since the CLT panel is inserted from the outer main surface side of the two CLT panels, the CLT panels are arranged on each surface of the rectangular parallelepiped, and the opening of the first CLT panel and the second CLT that are open outward By inserting the joining members into the openings of the panels, the CLT panels can be easily joined to obtain a box-shaped building unit. Also, a building can be obtained by connecting a plurality of such box-shaped building units.

1 is a perspective view of a box building unit according to an embodiment of the invention; FIG. Figure 2 is a front view of the box building unit of Figure 1; 3 is a left side view of FIG. 2; FIG. FIG. 2 is an exploded perspective view of a joint portion of the CLT panel, enlarging the IV section of FIG. 1; It is a perspective view of a joint member. FIG. 6 is an exploded perspective view of the joining member of FIG. 5; FIG. 6 is a plan view of the joining member of FIG. 5; FIG. 6 is a front view of the joining member of FIG. 5; FIG. 6 is a bottom view of the joining member of FIG. 5; Figure 2 is a perspective view of a building using the box building unit of Figure 1; FIG. 11 is an exploded perspective view showing another embodiment of a joining member; FIG. 12 is a partially cutaway front view of the joining member of FIG. 11; FIG. 12 is a perspective view of the protective fitting of FIG. 11;

1 is a perspective view of a box-shaped building unit according to an embodiment of the present invention, FIG. 2 is a front view of the box-shaped building unit of FIG. 1, FIG. 3 is a left side view of FIG. 2, and FIG. 5 is a perspective view of the joint member; FIG. 6 is an exploded perspective view of the joint member of FIG. 5; FIG. 7 is a plan view of the joint member of FIG. 8 is a front view, and FIG. 9 is a bottom view.

As shown in FIGS. 1 to 3, the box-shaped building unit 1 according to the embodiment of the present invention includes CLT panels 10, 11, 12, 13, 14, 15, 16, 17, . CLT panels 10, 11, 12, 13, 14, 15, 16, 17, which are arranged on surfaces (ceiling surface, floor surface and four side wall surfaces) and serve as adjacent first and second members to be joined, . . are joined together using a joining member 2 which will be described later.

The orthogonal portion of each surface of this rectangular parallelepiped (box-shaped building unit 1) is set to the inner main surface of one (first) CLT panel as the first member to be joined and the other (second) as the second member to be joined. 2) A structure in which the end face or end face of the CLT panel is butted and joined so that the end end face or end face of the first CLT panel and the outer main surface of the second CLT panel are flush with each other. be. The end face of the CLT panel means the end face in the longitudinal direction of the CLT panel, and the end face of the CLT panel means the end face in the short direction of the CLT panel.

For example, the orthogonal portion between the CLT panel 10 on the ceiling surface and the CLT panel 11 on the side wall surface of the box-shaped building unit 1 is such that the wood end surface 11s of the CLT panel 11 is aligned with the inner main surface 10i of the CLT panel 10. The wood end surface 10s of 10 and the outer main surface 11o of the CLT panel 11 are butted against each other and joined by the joining member 2 so as to be the same. The orthogonal portion between the CLT panel 10 on the ceiling surface and the CLT panel 15 on the sidewall surface, the orthogonal portion between the CLT panel 13 on the sidewall surface and the CLT panel 14 on the sidewall surface, the CLT panel 16 on the sidewall surface and the CLT panel 17 on the sidewall surface. The same is true for the orthogonal part of . The same applies to the orthogonal portions between the CLT panels on the rear side, which do not appear in FIG.

The joint portion by the joint member 2 is such that the end face or end face of one (first) CLT panel and the outer principal face are wider on the outer principal face side than on the inner principal face side of the first CLT panel. The end face or end face of the other (second) CLT panel and at least the outer main face of the other (second) CLT panel are opened so that the inside of the second CLT panel is wider than the end end face or end face of the second CLT panel. It is opened like this. That is, the opening formed in the first CLT panel has a shape that expands inwardly from the joint surface with the second CLT panel, and the opening formed in the second CLT panel is the first CLT panel. It is a shape that expands as it goes inward from the joint surface.

For example, as shown in FIG. 4, at the joint between the CLT panel 10 and the CLT panel 11, an opening 10n is formed by opening the end surface 10s, the inner main surface 10i, and the outer main surface 10o of the CLT panel 10. An opening 11n is formed in the CLT panel 11 by opening the end surface 11s, the inner main surface 11i and the outer main surface 11o. The opening 10n is formed in an inverted isosceles trapezoidal shape in which the upper base is longer than the lower base when viewed from the end surface 10s, that is, the outer main surface 10o of the CLT panel 10 is wider than the inner main surface 10i. . The opening 11n is symmetrical with the opening 10n, and has an isosceles trapezoidal shape in which the upper base is shorter than the lower base when viewed from the outer main surface 11o. It is formed so that the far side (lower side in FIG. 4) is wider. The same applies to the joints of the orthogonal portions of the other CLT panels.

The joint member 2 is a julienne (butterfly joint) joint member having a shape corresponding to the openings 10n and 11n as described above. As shown in FIGS. 5 to 9, the joining member 2 includes a first member 21 having a shape corresponding to the opening 10n of the CLT panel 10 and a second member 22 having a shape corresponding to the opening 11n of the CLT panel 11. consists of The first member 21 and the second member 22 are separated from the tightening surfaces 21f and 22f, which are the outer surfaces of the first member 21 and the second member, sandwiching the joint surfaces 21e and 22e of the first member 21 and the second member 22. They are connected by a bolt 23 and a nut 24 as bolts and nuts to be tightened. Two bolts 23 are fixed on the plate 25 .

The first member 21 and the second member 22 are made of CLT, MDF (medium density fiberboard), wood, or the like. The first member 21 and the second member 22 have shapes corresponding to the openings 10n and 11n. However, the trapezoidal leg portion 21a of the first member 21 and the trapezoidal leg portion 22a of the second member 22 are arranged so that the joining member 2 is positioned outside of the box-shaped building unit 1 (on the end surface of the first CLT panel or the wood surface). end face and the outer main surface side of the second CLT panel) into the openings 10n and 11n, that is, in the example of FIG. , a slope is provided so that a force that clamps the CLT panels 10 and 11 together acts.

Holes 21b and 22b through which bolts 23 pass are formed in the first member 21 and the second member 22, respectively. A trapezoidal bottom portion 21c (tightening surface 21f) of the first member 21 is formed with a recessed portion 21d so that the nut 24 and the washer 26 do not protrude. A trapezoidal bottom portion 22c (tightening surface 22f) of the second member 22 is formed with a recessed portion 22d so that the plate 25 does not protrude. The joining member 2 is formed by passing the first member 21 and the second member 22 having the above-described configurations through the bolts 23 of the plate 25 and tightening them with the nuts 24 via the washers 26 to connect them.

The box-shaped building unit 1 having the above configuration has CLT panels 10, 11, 12, 13, 14, 15, 16, 17, . are placed, and the stripped joint members 2 are inserted into the openings 10n, 11n, etc., which are opened toward the outside of the adjacent CLT panels 10, 11, 12, 13, 14, 15, 16, 17, . It is possible to join easily by moving.

In particular, in this box-shaped building unit 1, when the CLT panel 10 and the CLT panel 11 are not tightly fastened together, the joining member 2 can be fixed by tightening the bolts 23 and nuts 24 from the outer main surface 10o side of the CLT panel 10. It is possible to tighten the first member 21 and the second member 22, and firmly tighten the CLT panel 10, the CLT panel 11, and the like. By forming the first member 21 and the second member 22 from an elastic member such as rubber, the box-shaped building unit 1 can have a seismic isolation structure.

In addition, in the box-shaped building unit 1 of this embodiment, the CLT panel 11 and the CLT panels 12 and 13 adjacent to each other in each plane of the rectangular parallelepiped are similarly provided with openings and are joined using the joining member 2 . The same is true for joining the CLT panel 15 and the CLT panels 14 and 16 together.

It is also possible to construct a building by connecting a plurality of the box-shaped building units 1 as shown in FIG.

Next, another embodiment of the joining member that joins the first member to be joined and the second member to be joined will be described. 11 is an exploded perspective view showing another embodiment of the joint member, FIG. 12 is a partially cutaway front view of the joint member of FIG. 11, and FIG. 13 is a perspective view of the protective fitting of FIG. 11 to 13, the same components as those of the joint member 2 described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

The joining member 2A shown in FIGS. 11 and 12 includes a first member 21 and a second member 22, a plurality of bolts 27 and nuts 28 as bolts and nuts for tightening the first member 21 and the second member 22, and a protective metal fitting. 3.

The fastening surfaces 21f and 22f of the first member 21 and the second member 22 are formed with recesses 29 for embedding the bolts 27 and nuts 28 therein. The counterbore 29 is a rectangular recess when viewed from a direction perpendicular to the fastening surfaces 21f and 22f. A plurality of counterbore portions 29 are formed side by side in the longitudinal direction of the fastening surfaces 21f and 22f.

As shown in FIG. 13 , the protective fitting 3 includes clamping portions 30a and 30b that clamp both side surfaces 21g, 21h, 22g, and 22h of the first member 21 and the second member 22, respectively, and along the inner surface of the undercut portion 29. It has a washer portion 31 and a connecting portion 32 that connects the clamping portions 30 a and 30 b and the washer portion 31 . The protective fitting 3 has a structure in which a holding portion 30a, a connecting portion 32, a washer portion 31, a connecting portion 32, and a holding portion 30b are connected in this order. , 22g and 22h in the lateral direction of the tightening surfaces 21f and 22f.

The washer portion 31 has a concave shape bent along the inner surface of the seat portion 29, and has a through hole 31a through which the bolt 27 passes. A plurality of washer portions 31 are provided corresponding to the plurality of counterbore portions 29 . The connecting portion 32 connects the plurality of washer portions 31 together.

In the joining member 2</b>A having the above configuration, the protective fitting 3 is interposed between the bolt 27 and the nut 28 and the recess 29 when joining the first member 21 and the second member 22 . Then, the first member 21 and the second member 22 are tightened with the bolts 27 and the nuts 28 at respective positions of the plurality of counterbore portions 29 .

In this joining member 2A, when the first member 21 and the second member 22 are tightened by the bolt 27 and the nut 28, the clamping portions 30a and 30b of the protective fitting 3 are held on both side surfaces of the first member 21 and the second member 22. 21g, 21h, 22g, and 22h are sandwiched between the first member 21 and the second member 22 to prevent the first member 21 and the second member 22 from expanding in the lateral direction of the tightening surfaces 21f and 22f, and the first member 21 and the second member 22 are cracked. to prevent

Further, in this joint member 2A, the first member 21 and the second member 22 are tightened by bolts 27 and nuts 28 at respective positions of a plurality of counterbore portions 29 formed side by side in the longitudinal direction of the tightening surfaces 21f and 22f. Therefore, twisting of the first member 21 and the second member 22 can be prevented. Furthermore, in this joining member 2A, since the washer portions 31 corresponding to the plurality of counterbore portions 29 are connected to each other by the connecting portion 32, the plurality of bolts 27 and nuts 28 and the protective fitting 3 are integrated to form the first joint. Since the 1st member 21 and the 2nd member 22 are joined, the 1st member 21 and the 2nd member 22 can be joined stably.

INDUSTRIAL APPLICABILITY The present invention is useful as a box-shaped building unit in which CLT panels are joined together and a building using the same.

1 box-shaped building unit 2, 2A joint member 3 protective fitting 10, 11, 12, 13, 14, 15, 16, 17 CLT panel 21 first member 22 second member 29 counterbore 30a, 30b clamping portion 31 washer Part 31a Through hole 32 Connecting part

Claims (5)

A stripped joining member made of wood for joining a first CLT panel and a second CLT panel used in a residential building ,
a first member having a solid interior and a shape corresponding to the opening formed in the first CLT panel , the opening expanding toward the inside from the joint surface with the second CLT panel ; ,
a second member having a solid interior and a shape corresponding to the opening formed in the second CLT panel , the opening expanding inwardly from the joint surface with the first CLT panel ; ,
A joint member comprising a bolt and nut to be tightened from tightening surfaces, which are outer surfaces of the first member and the second member, sandwiching a joint surface between the first member and the second member. a counterbore formed for embedding the bolt/nut in the tightening surface;
A protective fitting having a washer portion that extends in the lateral direction of the tightening surface so as to sandwich both side surfaces of the first member and the second member and that is bent along the inner surface of the counterbore. 2. The joining member according to claim 1, further comprising a protective fitting interposed between said bolt/nut and said counterbore . A plurality of counterbore portions are formed side by side in the longitudinal direction of the tightening surface,
The bolts and nuts are plural, and tighten the first member and the second member at respective positions of the plural counterbore portions ,
3. The joining member according to claim 2, wherein said protective fitting has a connecting portion for connecting said washers corresponding to a plurality of said counterbore portions. A box-shaped building unit formed by arranging CLT panels on each side of a rectangular parallelepiped and joining adjacent CLT panels with the joining member according to any one of claims 1 to 3,
The orthogonal portion of each face of the rectangular parallelepiped is such that the end face or end face of the second CLT panel is the end face or end face of the first CLT panel with respect to the inner main surface of the first CLT panel. A structure in which the outer main surface of the second CLT panel is butted flush with the outer main surface and joined by the joining member,
The joint portion by the joint member is such that the joint member is connected to the opening formed in the first CLT panel and the opening formed in the second CLT panel, and the joint member is the end face or end face of the first CLT panel. A box-shaped building unit having a structure inserted from the outer main surface side of the second CLT panel. A building in which a plurality of box-shaped building units according to claim 4 are connected.

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