Wooden member connecting structure and wooden earthquake-resistant wall equipped with same

Abstract

To provide a wooden member connecting structure which allows not only parts but also wooden members to be reused and has high deformation performance, and a wooden earthquake-resistant wall equipped with the same.SOLUTION: All of components 5 to 10 are made of metal. A gusset plate 10 is fixed to a joined member 2 and has a wooden member side flange portion 16 that extends parallel to an end face 3a of a wooden member 3. A headless lag screw bolt 5 has a wood male thread 52 on the circumferential surface and a female thread 51 on one end face 54, and is screwed into the bottom side of a tip hole 4 of the wooden member 3 from the other end face side and embedded in the range from the center of the tip hole 4 to a bottom 4b. A metal rod 6 has a nut male thread 62 and a mating bolt male thread 64 on both ends of a rod shaft portion 65 that extends linearly. The mating bolt male thread 64 screws into the female thread 51. A connector 7 is detachably connected to the wooden member side flange portion 16.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a wooden member connecting structure that connects wooden members and members to be connected, and a wooden earthquake-resistant wall including the same. [Background technology]

[0002] In order to contribute to achieving carbon neutrality and preventing global warming, there has been a demand in recent years for the use of wood in buildings. As part of this, GIR (Glued-in Rod) and GIUA (Glue in unbonded anchor) are known as connection structures for joining reinforced concrete structures to wooden members such as CLT (cross laminated timber) and LVL (laminated veneer lumber). These connection structures are disclosed in Patent Document 1, for example.

[0003] Figure 1 is a partial cross-sectional view of conventional joint structures, GIR200 and GIUA300. Figure 1(A) shows GIR200. In this figure, 200 is the GIR, 2 is the joined member, 3 is the wooden member, 231 is a crack caused by the destruction of the wooden member 3, 4 is the tip hole, 400 is epoxy resin, and 260 is a steel rod. GIR200 is a connection structure in which a steel rod 260 is inserted into a tip hole 4 drilled in a wooden member 3, and epoxy resin 400 (adhesive) is injected into the entire tip hole 4. In GIR200, the epoxy resin 400 firmly bonds the entire part of the steel rod 260 inside the tip hole to the wooden member 3. GIR200 is known as a typical steel rod insertion adhesive joint.

[0004] Figure 1(B) shows GIUA300. In this figure, 300 is GIUA, 360 is the steel rod used in GIUA300, 370 is the unbonded part, 2 is the joined material, 3 is the wooden material, 4 is the tip hole, and 400 is the epoxy resin. GIUA300 is a connection structure in which epoxy resin 400 is filled into tip hole 4 to bond steel rod 360 and wooden member 3, while having an unbonded portion 370 on the opening side of tip hole 4. The unbonded portion 370 is the area of ​​steel rod 360 that is not fixed to wooden member 3 by epoxy resin 400. In this figure, the unbonded portion 370 is formed by wrapping tape around steel rod 360 to prevent epoxy resin 400 from directly touching steel rod 360.

[0005] Fig. 2 is a partial cross-sectional view of a conventional connecting structure 500 using a metal connector. Fig. 2(A) is a partial cross-sectional view of the connecting structure 500 when it is connected to the workpieces 2, and Fig. 2(B) is a partial cross-sectional view of the connecting structure 500 when a long bolt 560 breaks. Fig. 2(C) is an enlarged view of part L in Fig. 2(B). Note that Fig. 2(B) shows the thickness of the long bolt 560 and the size of the tool T at the same scale as Fig. 5 described later.

[0006] A connection structure 500 using metal connectors is disclosed in, for example, Patent Document 2. In the connecting structure 500 of Patent Document 2, a long bolt 560 is fixed to a wooden member 3 by screwing it into a screw member 550 that is screwed into the wooden member 3 so that an end face 554 that abuts against the connecting metal fitting fits with an end face 3a of the wooden member 3. Specifically, the screw member 550 has a hollow hole 552 formed in the axial direction from the end face 554 that abuts against the connecting metal fitting to near the center of its entire length, and a female thread 551 is cut into the bottom of the hollow hole 552. The long bolt 560 is fixed to the wooden member 3 by screwing a male thread 564 at a tip end 563 of the long bolt 560 into the female thread 551. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2021-188326 A [Patent Document 2] JP 2007-77611 A Summary of the Invention [Problem to be solved by the invention]

[0008] As shown in Figure 1(A), GIR200 has low deformation performance because the entire steel rod 260 in the tip hole and the wooden member 3 are firmly bonded with epoxy resin 400. Therefore, in a building using GIR200, when a large force is applied, the wooden member 3 is destroyed before the steel rod 260, so the structural strength required in the event of a major earthquake must be increased, and as a result, the structural members have to be made larger. In contrast, GIUA300 shown in Figure 1(B) has an unbonded section 370 that does not bond the steel rod 360 to the wooden member 3, allowing the steel rod 360 to expand and contract without damaging the wooden member 3 until large deformation occurs, thereby absorbing energy. As a result, GIUA300 was able to increase the deformation performance, which was an issue with GIR200.

[0009] However, epoxy resin 400, an essential material in GIR200 and GIUA300, is a material that cannot be reused, so GIR200 and GIUA300 have a large environmental impact. Furthermore, in the case of GIR200 and GIUA300, the steel rods 260, 360 and the wooden members 3 are firmly bonded with epoxy resin 400, so the steel rods 260, 360 cannot be removed without destroying the wooden members 3. Therefore, even if the steel rods 260, 360 are damaged by a major earthquake or the like and the wooden members 3 are intact, it is not possible to replace only the steel rods 260, 360 and reuse the wooden members 3 as they were before the damage, and the wooden members 3 become waste material.

[0010] On the other hand, the connecting structure 500 of Patent Document 2 in FIG. 2 connects wooden members 3 only with metal connectors without using epoxy resin, and therefore at first glance appears to be reusable, but in reality it is not. When the shaft 565 of the long bolt 560 breaks as shown in FIG. 2(B), the tip side of the long bolt 560 remains in the hollow hole 552 of the screw member 550. Since the tip 563 of the long bolt 560 is screwed into the bottom of the hollow hole 552, it cannot be removed unless the shaft 565 of the long bolt 560 is rotated. However, since there is not much of a gap 566 between the inner surface of the hollow hole 552 and the side surface of the shaft 565 of the long bolt 560, a tool T such as pliers cannot enter the gap 566, and the broken long bolt 560 cannot be removed. Furthermore, because the hollow hole 552 of the screw member 550 is blocked by the broken long bolt 560, a tool for removing the screw member 550 cannot be attached to the screw member 550. Therefore, the only way to remove the screw member 550 from the wooden member 3 is to destroy the wooden member 3. Therefore, even if only the long bolt 560 is damaged, the only way to remove the long bolt 560 is to destroy the wooden member 3, so the only way to repair it is to replace the entire wooden member 3 to which the long bolt 560 is fixed with a new one.

[0011] Moreover, even if the screw member 550 can be somehow removed from the wooden member 3, the threads of the screw member 550 are firmly screwed into the wooden member 3, so forcibly removing the screw member 550 will wear down and damage the inner surface of the tip hole. Even if a new screw member 550 is screwed into such a worn tip hole, there is still concern about its strength. Therefore, even if there is no damage to the screw member 550 or the wooden member 3, if the long bolt 560 breaks, the connecting structure 500 including the wooden member 3 must be replaced in its entirety. Therefore, after repair, the wooden member 3 cannot be reused as the same member for the same purpose as before the damage, and the removed wooden member 3 must be disposed of as waste.

[0012] In light of these circumstances, and in order to further reduce the environmental impact, there was a need to develop a new connecting structure that would be composed entirely of parts made from recyclable materials while maintaining the same high deformation performance compared to GIUA300, and that would also allow the wooden components themselves to be reused.

[0013] The present invention has been devised to solve the above-mentioned problems. That is, the object of the present invention is to provide a wooden member connection structure that allows not only the parts but also the wooden members to be reused, and has high deformation performance, and a wooden earthquake-resistant wall equipped with the same. [Means for solving the problem]

[0014] According to the present invention, there is provided a wooden member connecting structure for connecting a wooden member and a connected member, comprising: a gusset plate having a wooden member side flange portion fixed to the joined member and extending parallel to an end surface of the wooden member; a headless lag screw bolt made of metal, the headless lag screw bolt having a male thread for wood provided on the peripheral surface of the shaft portion and a female thread provided in the axial direction from one end face, the headless lag screw bolt being screwed from the other end face side of the shaft portion into the bottom side of a pilot hole opening on the end face of the wooden member, the headless lag screw bolt being embedded in the range from the center to the bottom in the longitudinal direction of the pilot hole; A metal rod made of metal having a male thread for a nut provided at one end, a male thread for a mating bolt provided at the other end and capable of being screwed into the female thread, and a rod-shaped rod shaft portion extending linearly between the male thread for the nut and the male thread for the mating bolt; and a metal connector that detachably connects the male nut thread to the wooden member side flange portion.

[0015] According to the present invention, there is provided a wooden earthquake-resistant wall having the above-mentioned wooden member connection structure, A wood-based thick board surface material composed of a plurality of wood panels aligned flush in the horizontal direction when viewed from the front; A column-beam frame of reinforced concrete or steel-reinforced concrete construction surrounding the four periphery of the wood-based thick board surface material; A plurality of the gusset plates fixed to the inside of the column-beam frame; The wooden member connecting structure is disposed diagonally from the four corners of each wooden panel toward the center of the wooden panel, and connects the gusset plate and each wooden panel, The wooden member is the wood panel, The member to be joined is a wooden earthquake-resistant wall, which is the column-beam frame. Effect of the Invention

[0016] According to the present invention described above, both ends of the metal rod are connected to the gusset plate and headless lag screw bolt fixed to the joined members, and the circumferential surface of the rod shaft of the metal rod is not fixed to the surrounding parts. Therefore, when a large force is applied to the wooden member connection structure of the present invention, the rod shaft can expand and contract in its axial direction, so that the wooden member connection structure of the present invention can absorb energy. This allows the wooden member connection structure of the present invention to have a large deformation performance.

[0017] The metal rod is indirectly connected to the wood member by being screwed into a headless lag screw bolt that is screwed into the wood member, so that it can be easily removed from the wood member and replaced with a new metal rod by simply rotating the metal rod in the opposite direction without damaging the wood member.

[0018] Furthermore, in the wooden member connecting structure, the headless lag screw bolt is embedded in the range from the center to the bottom in the longitudinal direction of the tip hole, so there is a wide gap around the rod shaft of the metal rod. Therefore, in the present invention, even if the rod shaft breaks, a tool can enter the wide gap, so the broken rod shaft can be grasped with the tool, rotated around its axis, and released from the headless lag screw bolt, allowing it to be removed from the tip hole. Therefore, in the wooden member connecting structure, even if the metal rod breaks at the rod shaft, it can be easily removed from the tip hole without destroying the wooden member. In addition, because the metal rods can be replaced without destroying the wooden members, the headless lag screws and bolts and wooden members used before the repair can continue to be used as the same parts even after the repair. Therefore, the wooden member connection structure allows the wooden members to be reused even after the repair.

[0019] Furthermore, since all of the components of the wooden member connecting structure are made of metal, these components can be reused as metal materials. Therefore, the wooden member connection structure can provide a building with a low environmental impact because not only the components that make up the structure, such as headless lag screw bolts, metal rods, connectors, and gusset plates, but also the wooden members can be reused. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a partial cross-sectional view of a conventional connecting structure of a GIR and a GIUA. [Diagram 2] FIG. 1 is a partial cross-sectional view of a conventional connection structure using a metal connector. [Diagram 3] FIG. 2 is a front cross-sectional view of the wooden member connecting structure of the first embodiment. [Figure 4] 3A to 3C are explanatory diagrams of a connecting method of the wooden member connecting structure of the first embodiment. [Diagram 5] 1A to 1C are explanatory diagrams of the repair process for the wooden member connection structure of the first embodiment in which the metal rod is broken. [Figure 6] This is a front view of a wooden earthquake-resistant wall as seen from the inside of the room. [Figure 7] FIG. 7 is an enlarged view of a portion M in FIG. 6. [Figure 8] FIG. 8 is a view taken along the arrow in FIG. [Figure 9] FIG. 2 is an explanatory diagram of the resistance mechanism of the wooden earthquake-resistant wall of the first embodiment. [Figure 10] FIG. 7 is a view taken along the arrow SS in FIG. 6. [Figure 11] 7 is an enlarged view of a portion U in FIG. 6 when the wooden earthquake-resistant wall is the second embodiment. FIG. [Figure 12] 7 is an enlarged view of part M in FIG. 6 when the wooden member connecting structure of the second embodiment is used in a wooden earthquake-resistant wall. [Figure 13] FIG. 11 is a front cross-sectional view of a wooden member connecting structure according to a third embodiment. [Figure 14] FIG. 11 is a front cross-sectional view of the wooden member connecting structure of the third embodiment when a large force is applied. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, common parts in each drawing are given the same reference numerals, and duplicated explanations will be omitted.

[0022] (First embodiment) FIG. 3 is a front cross-sectional view of the wooden member connecting structure 1 of the first embodiment. In this diagram, 1 is a wooden member connecting structure, 2 is the members to be joined, 3 is a wooden member, 3a is an end face, 4 is a tip hole, 4b is the bottom of tip hole 4, 4c is the opening of tip hole 4, and 4e is an enlarged portion of tip hole 4. Also, 5 is a headless lag screw bolt, 55 is the other end face, 6 is a metal rod, 71 is a nut, 8 is a washer, 9 is a metal tube, and 10 is a gusset plate. The wooden member connecting structure 1 of this embodiment is a connecting structure that connects a wooden member 3 and a connected member 2. The connected member 2 may be, for example, any of reinforced concrete, steel-reinforced concrete, metal, and wooden members.

[0023] The wooden member 3 may be solid wood, LVL (Laminated Veneer Lumber), CLT (Cross Laminated Timber), or other laminated lumber. CLT is a wood board material made by gluing layers of sawn boards or small square timber together so that the boards cross each other at right angles. LVL is a wood board material made by laminating and gluing veneers with the grain aligned in the same direction. Both CLT and LVL are characterized by their high earthquake resistance and fire resistance. The wooden member 3 is provided with a tip hole 4. The tip hole 4 is provided with a diameter large enough to receive a headless lag screw bolt 5, and is a hole that opens to an end face 3a of the wooden member 3 and has a closed bottom 4b.

[0024] The components 5, 6, 7, 9, and 10 included in the wooden member connection structure 1 of this embodiment are the headless lag screw bolt 5, the metal rod 6, the metal tube 9, the connector 7, and the gusset plate 10, all of which are made of metal. The connector 7 of this embodiment is a nut 71 and a washer 8.

[0025] The headless lag screw bolt 5 of this embodiment does not have a hexagonal nut with a head, and is a connector having a male thread machined around a shaft portion 53. A female thread 51 is provided in the axial direction on one end face 54 of the shaft portion 53. The female thread 51 is coaxial with the shaft portion 53. The length of the shaft portion 53 of the headless lag screw bolt 5 is 1 / 4 to 3 / 4 of the depth of the pilot hole 4. The headless lag screw bolt 5 is screwed from the other end side to the bottom side of the tip hole 4, with the female threads 51 facing backward (i.e., toward the opening side of the tip hole 4). When the headless lag screw bolt 5 is screwed into the tip hole 4 of the wooden member 3, the male wood threads 52 provided on the circumferential surface of the shaft portion 53 engage with the wood tissue and cannot be removed. As a result, the headless lag screw bolt 5 is embedded in the range from the center in the longitudinal direction of the tip hole 4 to the bottom 4b. The "center in the longitudinal direction of the tip hole 4" refers to the range from the opening 4c to 1 / 4 to 3 / 4 of the depth of the tip hole 4.

[0026] The inner diameter of the tip hole 4 in the longitudinal direction from the center to the bottom 4b may be the same as the outer diameter (root diameter) of the thread root of the headless lag screw bolt 5. However, if the headless lag screw bolt 5 does not come out of the wooden member 3 even when a large force is applied, the inner diameter of the tip hole 4 in the range from the center to the bottom 4b may be a length between the maximum diameter of the headless lag screw bolt 5 and the root diameter of the male wood thread 52. Furthermore, unlike Patent Document 2, the wooden member connecting structure 1 of this embodiment has no parts that screw into the wooden member 3 near the opening of the end hole 4, so the inner diameter near the opening of the end hole 4 (near the end face 3a of the wooden member 3) can be made larger than the inner diameter in the range from the center to the bottom 4b. Therefore, the inner diameter near the opening of the end hole 4 can be set to be the same as the outer diameter of the nut 71 or larger than the outer diameter of the nut 71, as shown in the figure.

[0027] Hereinafter, the portion in the vicinity of the opening where the inner diameter of the tip hole 4 is larger than the inner diameter of the range from the center to the bottom 4b is referred to as the "expanded portion 4e." The expanded portion 4e is provided at the end of the opening side of the tip hole, and is a portion whose inner diameter is larger than the outer diameter of the connector 7 between the wooden member side flange portion 16 and the wooden member 3, and whose inner diameter is larger than the range from the center to the bottom 4b of the tip hole 4. The existence of the expanded portion 4e in the vicinity of the opening of the tip hole 4 can prevent the nut 71 from hitting the wooden member 3 when the rod shaft portion 65 is deflected by a large force such as a major earthquake. The expanded portion 4e may be provided in a position deeper than the range that the nut 71 can reach when a large force such as a major earthquake is applied to the wooden member connecting structure 1.

[0028] The metal rod 6 is a rod-shaped member made of metal and thinner than the headless lag screw bolt 5. The metal rod 6 has a male thread 62 for a nut provided at one end 61, a male thread 64 for a mating bolt provided at the other end 63, and a rod-shaped rod shaft portion 65 extending linearly between the male thread 62 for a nut and the male thread 64 for a mating bolt. These male threads 62, 64 are both formed by rolling. The male thread 64 for a mating bolt is screwed into the female thread 51 of the headless lag screw bolt 5, so that the metal rod 6 and the headless lag screw bolt 5 can be screwed together. The female thread 51 of the headless lag screw bolt 5 is coaxial with the shaft portion 53 of the headless lag screw bolt 5, so that the metal rod 6 and the headless lag screw bolt 5 can be coaxially connected by simply screwing the metal rod 6 into the female thread 51 of the headless lag screw bolt 5. As a result, even if the headless lag screw bolt 5 is located in a place that is not directly visible to people, such as the bottom of the tip hole 4 as shown in the figure, it can always be coaxially connected by simply screwing the mating bolt male thread 64 into the headless lag screw bolt 5. Furthermore, the metal rod 6 has a male thread 62 for a nut at one end 61 thereof, into which the connector 7 is screwed.

[0029] The tip hole 4 has a diameter sufficient to receive the headless lag screw bolt 5 , and since the metal rod 6 is thinner than the headless lag screw bolt 5 , the metal rod 6 is thinner than the inner diameter of the tip hole 4 . The strength of the metal bar 6 is set to be smaller than the fixing strength of the headless lag screw bolt 5 to the wooden member 3. The strength of the metal bar 6 can be increased or decreased by changing the strength of the material of the metal bar 6 and the diameter of the metal bar 6. The material of the metal bar 6 is preferably steel, but may be stainless steel or other metals.

[0030] The metal rod 6 is also manufactured to have elongation capacity. For example, the material of the metal rod 6 is preferably rolled steel bar for building construction (e.g., SNR490B) which has excellent tensile strength. The nut male thread 62 and the mating bolt male thread 64 of the metal rod 6 are preferably rolled threads in which the difference in tensile strength between the threaded portion and the rod shaft portion 65 is small and breakage of each portion does not occur until the rod shaft portion 65 is sufficiently plastically deformed. The metal rod 6 may have the same thread configuration, thickness, material, etc. of the nut male thread 62 and the mating bolt male thread 64 as the ABR anchor. The length of the metal rod 6 is preferably shorter than the standard for the ABR anchor.

[0031] The gusset plate 10 is a metal fitting made of steel or the like that is fixed to the workpieces 2. The gusset plate 10 is preferably fixed to the workpieces 2 by headed studs 44 or bolts 45. The gusset plate 10 also has a web portion 14, a flange portion 15 on the joined member side, and a flange portion 16 on the wooden member side, and may or may not have a rib portion 17 described below.

[0032] The joined member side flange portion 15 is a flange extending along the joined members 2 . The wooden member side flange portion 16 is a flange that extends parallel to the end face 3 a of the wooden member 3 . The web portion 14 is a plate-like portion extending between the flange portion 15 of the joined member side and the flange portion 16 of the wooden member side.

[0033] The wooden member side flange portion 16 is provided at an end portion of the web portion 14 in a position facing the end face 3 a of the wooden member 3 . The wooden member side flange portion 16 is provided with a groove 18 for inserting and connecting the metal rod 6 or a hole 19 for passing the metal rod 6 therethrough.

[0034] For example, the groove 18 of the wooden member flange 16 extends in a direction in which the wooden member 3 can be moved and opens in that direction. For example, in the example of Fig. 3, the groove 18 of the wooden member flange 16 opens toward the front of the page. With this configuration, the wooden member connecting structure 1 of the first embodiment can remove the wooden member 3 from the joined member 2 by loosening the nut 71 and moving the wooden member 3 along the groove 18 toward the front of the page.

[0035] For example, if the wooden member side flange portion 16 in Figure 3 has a hole 19 and the wooden member 3 can be moved downward in this figure, the wooden member 3 can be removed from the joined member 2 by removing the top two nuts 71B, 71C and then moving the wooden member 3 together with the wooden member 3 downward in the figure.

[0036] The connector 7 is a component that detachably connects the wooden member side flange portion 16 of the gusset plate 10 and the male nut thread 62 of the metal bar 6 . The wooden member connecting structure 1 of the first embodiment has, for example, a nut 71 and a washer 8 as a connector 7 that screws into the nut male thread 62 to connect the metal rod 6 to the joined member 2. For example, in the wooden member connecting structure 1 of the example in this figure, multiple nuts 71 are screwed into the nut male thread 62 of the metal rod 6 that is passed through the groove 18 or hole 19, and the multiple nuts 71 sandwich the wooden member side flange portion 16 from both sides. In this way, the connector 7 indirectly connects the metal rod 6 to the joined member 2.

[0037] Both the nut 71 and the washer 8 are preferably made of carbon steel or stainless steel. For example, it is preferable that one nut 71 is arranged in front of the joined members 2 in the axial direction of the metal rod 6, and two are arranged behind. In the following description, the nut 71 arranged on the front side (i.e., on the wooden member side) of the joined members 2 in the axial direction of the metal rod 6 is called a front nut 71A. Of the two nuts 71 arranged behind the joined members 2 in the axial direction of the metal rod 6, the nut 71 adjacent to the washer 8 is called a rear nut 71B. The nut 71 adjacent to the rear nut 71B and arranged on the rearmost side of the metal rod 6 is called an end nut 71C.

[0038] For example, first, the front nut 71A is screwed onto the nut male thread 62, and the front nut 71A is rotated to move it towards the rod shaft portion within the nut male thread 62. The part of the metal rod 6 that is rearward of the front nut 71A is inserted into the groove 18 provided in the gusset plate 10, and a washer 8, a rear nut 71B, and an end nut 71C are attached to the nut male thread 62 protruding beyond the groove 18. The nuts 71 are then moved in this state, and the joined members 2 are sandwiched in the axial direction of the metal rod 6 between the rear nut 71B, the washer 8, and the front nut 71A. In this way, the connector 7 of the wooden member connecting structure 1 can connect the metal rod 6 to the joined members 2. When the connection between the metal rod 6 and the workpieces 2 is completed, it is preferable that the other end surface 92 of the metal pipe 9 is not in contact with the nearest front nut 71A.

[0039] The metal tube 9 is a hollow cylindrical metal tube having a hollow portion 91 whose inner diameter is larger than the maximum diameter of the metal rod 6. The outer diameter of the metal tube 9 is smaller than the inner diameter of the tip hole 4. The inner diameter of the hollow portion 91 of the metal tube 9 is also larger than the outer diameter of the male nut thread 62 of the metal rod 6. The material of the metal pipe 9 does not have to be a metal material as strong as the metal rod 6 or the headless lag screw bolt 5. In other words, the material of the metal pipe 9 may be any material that has sufficient strength to prevent the metal rod 6 from buckling when a large force is applied to the wooden member connection structure 1 due to a major earthquake or the like. The material of the metal pipe 9 may be, for example, SS400 (general structural rolled steel).

[0040] When attaching the metal tube 9 to the metal rod 6, the mating bolt male thread 64 of the metal rod 6 is first screwed into the female thread 51 of the headless lag screw bolt 5, and then one end 61 of the metal rod 6 is passed through the hollow portion 91 of the metal tube 9, and the metal tube 9 is inserted into the tip hole 4 as is. In this manner, with the metal rod 6 passing through the hollow portion 91, the metal tube 9 surrounds the rod shaft portion 65 within the tip hole on the opening side (the rear side in the axial direction of the metal rod 6) of the headless lag screw bolt 5. By providing the metal tube 9, the gap 66 around the rod shaft portion 65 is narrowed, and the range in which the rod shaft portion 65 can move in a direction intersecting the axial direction of the metal rod 6 is narrowed, so that the rod shaft portion 65 can be prevented from buckling when the one end 61 of the metal rod 6 is pressed toward the other end 63.

[0041] When the metal tube 9 is inserted into the tip hole 4, it is preferable that the other end face 92 is deeper than the opening 4c of the tip hole 4. Furthermore, when the metal tube 9 is inserted into the tip hole 4, it is preferable that the other end face 92 is closer to the bottom than the expanded portion 4e. In other words, the axial length of the metal tube 9 is preferably shorter than the distance from one end face 54 (rear end face) of the headless lag screw bolt 5 screwed into the pilot hole 4 to the connector 7. Furthermore, the axial length of the metal tube 9 is most preferably shorter than the shortest distance from one end face 54 of the headless lag screw bolt 5 to the connector 7 when the nut male thread 62 is pushed toward the other end 63 with a large force due to a major earthquake or the like, causing the metal rod 6 to bend. This makes it possible to prevent a large force from being applied from the workpieces 2 to the headless lag screw bolt 5 via the metal tube 9.

[0042] In the wooden member connecting structure 1 of this embodiment, both ends of the metal rod 6 are connected to the members 2 and the headless lag screw bolt 5, and the circumferential surface of the rod shaft part 65 between them passes through the hollow part 91 of the metal pipe 9 and is not fixed to anything. Therefore, when a large force is applied in a major earthquake or the like, the rod shaft part 65 expands and contracts, so that the wooden member connecting structure 1 can absorb energy. This allows the wooden member connecting structure 1 of this embodiment to have large deformation performance.

[0043] Furthermore, since the metal rod 6 in this embodiment has a strength smaller than the fixing strength of the headless lag screw bolt 5 to the wooden member 3, when a large force is applied to the wooden member connecting structure 1, the metal rod 6 expands and contracts and deforms first, thereby absorbing the force and making it possible to suppress damage to the wooden members 3. In other words, when a large force is applied, the metal rod 6 expands and contracts and deforms before the wooden members 3 are destroyed, and therefore is the first part of the wooden member connecting structure 1 to be damaged. Therefore, even if a large force is applied to the wooden member connecting structure 1, the wooden members 3 are not destroyed, and the wooden member connecting structure 1 can be easily repaired by simply replacing the deformed metal rod 6 with a new one.

[0044] Moreover, the metal rod 6 is indirectly connected to the wooden member 3 via the headless lag screw bolt 5 by screwing into the wooden member 3. This allows the metal rod 6 to be easily removed from the wooden member 3 without damaging the wooden member 3 and replaced with a new metal rod 6. Therefore, because the metal rod 6 is easy to replace, the wooden member connecting structure 1 can be easily repaired without destroying the wooden member 3.

[0045] In addition, all of the components of the wooden member connection structure 1 are made of metal, including the metal rods 6, so the deformed metal rods 6 can be reused as metal material. Therefore, the wooden member connection structure 1 can provide a building with a low environmental impact. Furthermore, the headless lag screw bolt 5 of this embodiment has a shorter overall length relative to the depth of the tip hole 4 than the screw member 550 of Patent Document 2, so the area for male threading can be narrower than that of the screw member 550, and less metal is required as raw material. Furthermore, the wooden member connecting structure 1 of this embodiment can prevent the metal rod 6 from buckling without special processing such as male threading on the metal tube 9 or manufacturing the metal tube 9 from a special material. Therefore, the wooden member connecting structure 1 can be manufactured at a lower cost than the connecting structure 500 of Patent Document 2.

[0046] Next, a connecting method for the wooden member connecting structure of this embodiment will be described. Fig. 4 is an explanatory diagram of the connecting method of the wooden member connecting structure of the first embodiment. In Fig. 4, the process progresses from (A) to (D). In this figure, 1 is a wooden member connecting structure, 3 is a wooden member, 3a is an end face, 4 is a tip hole, 4b is the bottom of tip hole 4, 4c is the opening of tip hole 4, 5 is a headless lag screw bolt, 6 is a metal rod, and 9 is a metal pipe.

[0047] First, as shown in Fig. 4(A), a pilot hole 4 is drilled in an end surface 3a of a wooden member 3. The inner diameter of the pilot hole 4 may be the same as the root diameter of the male wood thread 52 of the headless lag screw bolt 5, or may be a dimension between the maximum diameter and the root diameter of the male wood thread 52 of the headless lag screw bolt 5.

[0048] Next, as shown in FIG. 4(B), one end face 54 of the headless lag screw bolt 5 is directed rearward, and the headless lag screw bolt 5 is screwed into the tip hole 4 all the way. Next, as shown in FIG. 4(C), a metal rod 6 is inserted into the tip hole 4 and the mating bolt male thread 64 is screwed into the female thread 51 of the headless lag screw bolt 5.

[0049] 4(D), the metal rod 6 is passed from one end 61 of the metal rod 6 into the hollow portion 91 of the metal tube 9. Since the inner diameter of the metal tube 9 is larger than that of the metal rod 6 and the outer diameter is smaller than that of the pilot hole 4, it is inserted directly into the pilot hole 4 and fits in front of the headless lag screw bolt 5. Thereafter, the nut 71B is screwed onto the male nut thread 62, and the metal rod 6 is joined to the member 2 to be joined.

[0050] The process for attaching the wooden member connecting structure 1 to the wooden member 3 is not limited to this. For example, a pilot hole 4 may be drilled in the wooden member 3, a metal rod 6 may be screwed into the headless lag screw bolt 5 outside the wooden member 3, and a metal tube 9 may be passed through the metal rod 6. Then, the headless lag screw bolt 5 combined with the metal rod 6 and the metal tube 9 may be screwed into the pilot hole 4.

[0051] In the wooden member connecting structure 1 of this embodiment, the headless lag screw bolt 5 and the metal tube 9 are separate parts, so if the metal rod 6 breaks, the possibility of being able to remove just the metal rod 6 from the tip hole 4 is higher than in the conventional connecting structure 500 of Patent Document 2. This will be explained with reference to FIG. 5 is an explanatory diagram of a repair process for the wooden member connection structure 1 of the first embodiment in which the metal rod 6 is broken. In this diagram, 3 is a wooden member, 4 is a tip hole, 4a is an inner wall surface of the tip hole 4, 4c is an opening of the tip hole 4, 5 is a headless lag screw bolt, 6 is a metal rod, 9 is a metal tube, and T is a tool.

[0052] Fig. 5(A) is a partial cross-sectional view of the wooden member connecting structure 1 of the first embodiment in which the metal rod 6 has broken. Fig. 5(B) shows the process of removing the broken metal rod 6 from the headless lag screw bolt 5. Fig. 5(C) shows the process of inserting a new metal rod 6 into the headless lag screw bolt 5 after the broken metal rod 6 has been removed. Fig. 5(D) is a VV cross-sectional view of Fig. 5(A), and Fig. 5(E) is a WW cross-sectional view of Fig. 5(B). For ease of comparison with the conventional connecting structure 500, Fig. 5 illustrates an example in which the metal rod 6 has the same thickness as that in Fig. 2(B). Fig. 5 also illustrates the thickness of the metal rod 6 and the size of the tool T at the same scale as that in Fig. 2(B). Fig. 5(B) also illustrates an example in which the distance from the end face 3a of the broken wooden member 3 to the metal rod 6 is the same as that in Fig. 2(B).

[0053] The strength of the metal rod 6 in this embodiment is set to be smaller than the fixing strength of the headless lag screw bolt 5 to the wooden member 3. As a result, if a large force is applied to the wooden member connecting structure 1 due to a major earthquake or the like, it is expected that the headless lag screw bolt 5 and the wooden member 3 will not be damaged even if the metal rod 6 is damaged. In such a case, the headless lag screw bolt 5 and the wooden member 3 can be used continuously as is by simply replacing the damaged metal rod 6 with a new one.

[0054] For example, suppose that the rod shaft portion 65 is broken as shown in Fig. 5(A). As shown in Fig. 5(D), when the metal tube 9 remains in the tip hole 4, the gap 66 around the rod shaft portion 65 is too narrow to insert the tip of the tool T. However, in the wooden member connecting structure 1 of this embodiment, the headless lag screw bolt 5 and the metal tube 9 are configured as separate parts. The metal tube 9 is simply inserted into the tip hole 4 through the hollow part 91 of the metal rod 6, and is not fixed to the other adjacent parts 5, 7, 9, 10 or the inner wall surface 4a of the tip hole 4. With this configuration, the wooden member connecting structure 1 allows the metal tube 9 to be easily removed from the tip hole 4 by pinching the rear end of the metal tube 9.

[0055] As a result, a gap 4d is formed between the inner wall surface 4a of the tip hole 4 and the rod shaft portion 65. In other words, by removing the metal tube 9, the gap 66 around the rod shaft portion 65 becomes larger as shown in Fig. 5(E), and a larger space can be secured around the rod shaft portion 65 than before the metal tube 9 was removed.

[0056] 5(B), the space around the rod shank 65 is wider, so that the tool T can be inserted deeper into the tip hole 4. Also, because a wider space (gap 4d) can be secured around the rod shank 65, the tip of the tool T can be inserted into this gap 4d. This makes it possible to remove the metal rod 6 from the headless lag screw bolt 5 by gripping the broken rod shank 65 with the tool T and rotating it around its axis. Furthermore, by embedding the headless lag screw bolt 5 only in the range from the center to the bottom of the tip hole 4, an enlarged portion 4e can be provided near the opening of the tip hole 4, and the inner diameter near the opening of the tip hole 4 is larger, allowing the tool T to be inserted deeper into the tip hole 4. Therefore, the wooden member connecting structure 1 of this embodiment can increase the probability that the broken metal rod 6 can be removed if the metal rod 6 breaks deep in the tip hole 4.

[0057] Thereafter, as shown in Figure 5(C), the wooden member connection structure 1 can be repaired by connecting a new metal rod 6 to the headless lag screw bolt 5 and the joined members 2 as before. In addition, since the broken metal rod 6 can be removed without destroying the wooden members 3 and the headless lag screw bolt 5, the same wooden members 3 and headless lag screw bolt 5 can continue to be used even after the repair. Therefore, there is no need to dispose of the wooden members 3, and they can be reused after the repair. In addition, since the broken metal rod 6 is made of metal, it can be reused as a metal material. Therefore, in the wooden member connecting structure 1 of this embodiment, all of the parts, including the wooden members 3, can be reused.

[0058] (First embodiment) Next, a description will be given of an example of the wooden member connecting structure 1 of the first embodiment. The first example is a wooden earthquake-resistant wall 100 that uses the wooden member connecting structure 1 of the first embodiment. Fig. 6 is a front view of a wooden earthquake-resistant wall 100 as seen from the inside of a room. In this figure, 1 is a wooden member connecting structure, 20 is a column-beam frame, 21 is a column, 22 is a beam, 10 is a gusset plate, 31 is a wooden thick board surface material, 32A, 32B, and 32C are wooden panels of different widths, and 100 is a wooden earthquake-resistant wall. When referring to the wooden panels 32A, 32B, and 32C collectively, they are referred to as wooden panel 32. 6 shows an example of a wooden earthquake-resistant wall 100 used as a load-bearing wall in an apartment building. The wooden earthquake-resistant wall 100 may be a boundary wall separating adjacent units, or a partition wall within a dwelling unit.

[0059] The column-beam frame 20 is made up of columns 21 and beams 22 of reinforced concrete construction (hereinafter referred to as RC construction) or steel-reinforced concrete construction (hereinafter referred to as SRC construction) that constitute the framework of an apartment building.

[0060] The wooden earthquake-resistant wall 100 of this embodiment is characterized by a structure in which the wooden thick plank surface material 31 is surrounded on all four sides by RC or SRC columns 21 and beams 22. By surrounding the wooden thick plank surface material 31 on all four sides with the highly fire-resistant RC or SRC column-beam frame 20, the columns 21 and beams 22 can maintain the structure of the building and prevent collapse even if the wooden thick plank surface material 31 is lost in the event of a fire. As a result, the wooden earthquake-resistant wall 100 has sufficient fire resistance as a main structural part even if the wooden thick plank surface material 31 is not covered with the fire-resistant material 41, so the wooden thick plank surface material 31 can be used in exposed wood.

[0061] The wood-based thick plank surface material 31 is composed of a plurality of wood panels 32 made of CLT or LVL. Each of these wood panels 32 corresponds to a wood member 3 in the wooden member connecting structure 1 of this embodiment. A number of wood panels 32 are lined up flush horizontally when viewed from the front from inside the room, forming a single wood plank panel 31. In this figure, four wood panels 32 are lined up side by side and adjacent to each other. For example, if the wood plank panel 31 is CLT and the boards exposed on the surface on the interior side are oriented vertically as shown in the figure, the boundaries between adjacent wood panels 32 will blend into the boundaries between the sawn boards within the CLT. This makes the wood plank panel 31 look like it is made up of a single large sheet of CLT.

[0062] Each wooden panel 32 is sized (for example, width 1,200 mm, height 2,400 mm, thickness 100 mm) so that its weight (for example, 150 kg or less) can be manually installed. The width of the wood panels 32 does not have to be uniform. For example, in the case of this figure, three different widths of wood panels 32 are used. The wide wood panel 32A in the center of the lower floor is 1,575 mm wide, and the small wood panel 32B located directly above it on the upper floor is 787.5 mm wide. The width of the wide wood panel 32A is exactly twice as wide as the small wood panel 32B. The other wood panels 32 have a uniform width of 1,000 mm.

[0063] Each wooden panel 32 has four corners, as viewed from the front, each of which is provided with an obliquely cut notch 36 . An imaginary center line A of the beams 22 above and below the wooden panel 32 and an imaginary vertical line B extending along both side surfaces 35 of the wooden panel 32 intersect at four points to form an imaginary rectangle. Hereinafter, for the sake of explanation, the diagonal of this imaginary rectangle will be referred to as an imaginary diagonal D. In the wooden member connecting structure 1, the metal rods 6 and headless lag screw bolts 5 are provided at the four corners of the wooden panel 32 so as to extend along the imaginary diagonal D or to extend parallel to the imaginary diagonal D. As a result, the metal rods 6 of the wooden member connecting structure 1 are provided so as to extend obliquely from the cutouts 36 at the four corners of the wooden panel 32 toward the center C of the wooden panel 32, which is the intersection of the imaginary diagonal D.

[0064] Therefore, if the width of the wood panel 32 changes, such as in the wide wood panel 32A and the narrow wood panel 32B in the figure, the angle of the imaginary diagonal D also changes, and the angle at which the tip hole 4 is provided will differ depending on the width of the wood panel 32. 6 also illustrates a case where the imaginary vertical lines B of the upper and lower floors are aligned, such as two wooden panels 32B of the upper floor and two wooden panels 32A of the lower floor. However, the present invention is not limited to this, and the imaginary vertical lines B of the upper and lower floors do not have to be aligned.

[0065] Fig. 7 is an enlarged view of part M in Fig. 6. In this view, the wooden panel 32 is cut vertically on a plane parallel to the front so that the inside of the tip hole 4 can be seen. Fig. 8 is a view as viewed from the arrows in Fig. 7. Fig. 8(A) is a view as viewed from the arrow NN, Fig. 8(B) is a view as viewed from the arrow PP, and Fig. 8(C) is a view as viewed from the arrow QQ. Note that in Fig. 8(A), the illustration of the wooden panel 32 is omitted. In Fig. 7 and Fig. 8, 1 is a wooden member connecting structure, 4 is a tip hole, 4b is a bottom of the tip hole 4, 4c is an opening of the tip hole 4, 5 is a headless lag screw bolt, 52 is a male thread for wood, 53 is a shaft of the headless lag screw bolt 5, 71A is a front nut, 71B is a rear nut, and 71C is an end nut. Also, in Fig. 7 and Fig. 8, 6 is a metal rod, 21 is a column, 22 is a beam, 10 is a gusset plate, 14 is a web portion, 17 is a rib portion, 16 is a flange portion on the wooden member side, 18 is a groove, 18a is an opening of the groove, 32 is a wooden panel, and 100 is a wooden earthquake-resistant wall. In the following description, the direction toward the center C in a front view of the wooden panel 32 is called the "bottom side of the tip hole 4" or the "center side", and the direction away from the center C is called the "opening side of the tip hole 4" or the "outside of the imaginary diagonal line D".

[0066] As shown in Figure 7, the four corners of the wood panel 32 are provided with cutouts 36 having a plane that intersects with the top surface 34 or bottom surface and the side surface 35. Hereinafter, this plane will be referred to as a slope 33. As the cutouts 36 of the wood panel 32 have slopes 33, multiple wooden member connecting structures 1 can be provided side-by-side in one cutout 36. This makes it possible to distribute component forces F2 and F3, which will be described later, to multiple wooden member connecting structures 1. Furthermore, it is preferable that the slope 33 is a plane perpendicular to the imaginary diagonal D of each wood panel 32. By having the slope 33 be a plane perpendicular to the imaginary diagonal D of each wood panel 32, the component forces F2 and F3 acting on the wooden member connecting structure 1 provided on the slope 33 can be evenly distributed.

[0067] The wooden panel 32 is fixed with a gap 43 between the column-beam frame 20 and the four sides (top surface 34 and side surface 35 in FIG. 7) adjacent to the column-beam frame 20. This gap 43 is set at a distance that will prevent the wooden panel 32 from interfering with the column-beam frame 20 in the event of an earthquake.

[0068] The four corners of the wood panel 32 are provided with pilot holes 4 that open into the cutouts 36. The pilot holes 4 extend from the cutouts 36 along or parallel to the imaginary diagonal line D. As a result, the headless lag screw bolts 5, metal rods 6, and metal tubes 9 inserted into the pilot holes 4 are also arranged along or parallel to the imaginary diagonal line D. In the example of FIG. 7, three wood member connecting structures 1 are embedded in the four corners of the wood panel 32 parallel to the imaginary diagonal line D. Note that one or more wood member connecting structures 1 may be provided in one cutout 36.

[0069] A gusset plate 10 is fixed to the inside of a RC or SRC column-beam frame 20. The gusset plate 10 is a steel metal fitting, and has a web portion 14, a flange portion 15 on the joined member side, a flange portion 16 on the wooden member side, and a rib portion 17. The web portion 14 is a plate-like member extending to match the shape of the cutout portion 36 between the flange portion 15 of the joined member extending along the side of the column-beam frame 20 and the flange portion 16 of the wooden member extending parallel to the slope 33 of the wood panel 32. The joined member side flange portion 15 of the gusset plate 10 located at the corner formed by the column 21 and beam 22 forms a right angle, and is fixed by multiple headed studs 44 along both the column 21 and the beam 22 when attached to the column-beam frame 20. The joined member side flange portion 15 of the gusset plate 10 fixed in a location not in contact with the column 21 has a linear shape, and is fixed by multiple headed studs 44 along the upper or lower beam 22 as shown in Figure 7.

[0070] The wooden member flange 16 is provided at the end of the web 14, facing the slope 33 of the wooden panel 32. The wooden member flange 16 extends perpendicular to the imaginary diagonal D and has a groove 18 for receiving the metal rod 6 of the wooden member connection structure 1. As shown in FIG. 8(A), the groove 18 opens toward the room side (the front side in the front view of FIG. 7) when the gusset plate 10 is attached to the column-beam frame 20. In this figure, all the grooves 18 of all the gusset plates 10 connected to the four corners of one wooden panel 32 extend from the opening 18a in parallel with each other from the front side to the back side in the front view. In other words, all the grooves 18 of all the gusset plates 10 connected to the four corners of one wooden panel 32 extend in the direction in which the wooden panel 32 can move, and the openings 18a face in the same direction. With this configuration, the wooden panel 32 with the wooden member connecting structure 1 embedded in its four corners can be moved in its thickness direction X to move the side of the male nut thread 62 of the metal rod 6 along the groove 18 of the wooden member side flange portion 16, thereby enabling it to be detached from the column beam frame 20. Therefore, the wooden panel 32 can be easily removed from the column beam frame 20 without destroying any of the column beam frame 20, wooden panel 32, gusset plate 10, and wooden member connecting structure 1.

[0071] Furthermore, the rib portions 17 extend in a columnar or plate shape from the wooden member flange portion 16 to the joined member flange portion 15. In this embodiment, the rib portions 17 extend straight from the wooden member flange portion 16 to the joined member flange portion 15, either parallel to the imaginary diagonal D as shown in Figure 7, or perpendicularly from the wooden member flange portion 16. It is preferable that the thickness of the rib portions 17 in the front-to-rear direction in this figure is the same as that of the wooden member flange portion 16. This structure of the rib portions 17 enables the wooden member flange portion 16 between the grooves 18 to be firmly supported. The shape of the gusset plate 10 is not limited to that shown in Fig. 7. For example, as shown in Fig. 6, the gusset plate 10 located between two wooden panels 32 has two wooden member side flanges 16 on both sides, each of which has a shape and angle that conforms to the slopes 33 of the two opposing wooden panels 32.

[0072] The wooden earthquake-resistant wall 100 is provided with nuts 71 that connect the gusset plate 10 and the metal rod 6. The male nut threads 62 of the metal rod 6 are fitted into the grooves 18 of the gusset plate 10, and the upper and lower parts of the wooden member flange portion 16 are sandwiched between the nuts 71, thereby connecting the male nut threads 62 of the metal rod 6 to the gusset plate 10. In this way, the wooden panel 32 is connected to the gusset plate 10.

[0073] 9 is an explanatory diagram of the resistance mechanism of the wooden shear wall 100 of the first embodiment. In this diagram, the distortion of the column-beam frame 20 is exaggerated to make the explanation easier to understand. The white arrows in this diagram represent the horizontal force F1 applied to the column-beam frame 20 by an earthquake or the like, and the rotational force caused by the horizontal force F1. The resistance forces R1 and R2 generated in the wooden shear wall 100 against these forces are represented by black arrows. In this diagram, D represents an imaginary diagonal, and C represents the center of the wooden panel 32, which is the intersection of the imaginary diagonal D. The resistance mechanism of the wooden earthquake-resistant wall 100 will be described in detail below using the wooden panel 32 on the far left of the figure as an example.

[0074] When an earthquake occurs in an apartment building, a horizontal force F1 acts on the upper beam 22 and the lower beam 22 of the column-beam frame 20 in opposite directions. For example, as shown in the figure, the horizontal force F1 acting from left to right acts on the upper beam 22, and the horizontal force F1 acting from right to left acts on the lower beam 22 (white straight arrows). In the wooden member connection structure 1, the metal rod 6 and the headless lag screw bolt 5 screwed in series extend parallel to the imaginary diagonal line D, and one end 61 of the metal rod 6 is connected to the gusset plate 10, so that the force acting on the beam 22 is transmitted from the gusset plate 10 to the metal rod 6. As a result, part of the horizontal force F1 acting on the beam 22 is resolved into component forces (F2, F3) parallel to the imaginary diagonal line D and a component force (not shown) perpendicular to the imaginary diagonal line D.

[0075] For example, in the case of the wooden member connecting structures 1 at the four corners of the wooden panel 32 at the top left of the figure, a component force F2 parallel to the imaginary diagonal line D, which is generated by the disintegration of a part of the horizontal force F1 from left to right applied to the upper beam 22, pushes the gusset plate 10 toward the center C of the wooden panel 32. In this figure, three wooden member connecting structures 1 are connected to one gusset plate 10. The metal rods 6 of each wooden member connecting structure 1 are inserted into the three grooves 18 of the wooden member flange portion 16. In this figure, the side of the metal rod 6 is inserted into the groove 18 of the wooden member flange portion 16 from the front to the back of the paper in the direction perpendicular to the paper. Each wooden member connecting structure 1 is fixed to the wooden member flange portion 16 by clamping both sides of the wooden member flange portion 16 with multiple nuts 71 that screw into the metal rods 6. As a result, one end 62 of the metal rod 6 moves following the movement of the wooden member flange portion 16.

[0076] With this configuration, a component force F2 parallel to the imaginary diagonal line D, which is generated by decomposing the horizontal force F1, is transmitted from the wooden member flange 16 to the front nut 71A and pushes one end 61 of the metal rod 6 toward the center C of the wood panel 32. The rod shaft 65 simply passes through the hollow portion 91 of the metal tube 9 and is not fixed at its periphery, so the metal rod 6 can move in the axial direction. However, since the side wall of the metal tube 9 surrounds the rod shaft 65, the range in which the rod shaft 65 can bend is limited by the inner diameter of the metal tube 9. Therefore, the wooden member connecting structure 1 is able to absorb the component force F2 by the rod shaft 65 bending inside the hollow portion 91 of the metal tube 9. In addition, since the metal tube 9 surrounds the rod shaft portion 65, the metal rod 6 cannot bend to such an extent that the rod shaft portion 65 buckles. Therefore, by having the metal tube 9, the wooden member connection structure 1 can prevent the rod shaft portion 65 from buckling.

[0077] Furthermore, a resistance force R1 that resists the component force F2 is generated in the rod shaft portion 65. This pushes back the wooden member side flange portion 16 toward the axial rear end side of the metal bar 6. This makes it possible to resist the horizontal force F1 pushing the upper beam 22 from left to right.

[0078] Next, in this figure, the wooden member connecting structure 1 at the four upper right corners of the same wooden panel 32 will be described. In this wooden member connecting structure 1, the metal rod 6 and the headless lag screw bolt 5 extend along the imaginary diagonal line D extending from the upper right to the lower left. Therefore, when a horizontal force F1 is applied to the upper beam 22 from left to right, a force is applied in the direction in which the gusset plate 10 moves away from the wooden panel 32. In other words, a component force F3 parallel to the imaginary diagonal line D generated by decomposing the horizontal force F1 pulls the wooden member side flange portion 16 of the gusset plate 10 to the outside of the imaginary diagonal line D. As a result, one end 61 of the metal rod 6 is pulled to the outside of the imaginary diagonal line D via the nut 71. The other end 63 of the metal rod 6 is screwed into the headless lag screw bolt 5 firmly screwed into the wooden panel 32, and the peripheral surface of the rod shaft portion 65 is not restrained by anything, so the rod shaft portion 65 is stretched by the tensile force applied to the one end 61 of the metal rod 6, absorbing part of the component force F3. Furthermore, as the stretched metal rod 6 attempts to return to its original shape due to elastic force, a resistance force R2 is generated that pulls the gusset plate 10 toward the center. Because the resistance force R2 pulls the wooden member side flange portion 16 of the gusset plate 10 toward the center, the wooden member connecting structure 1 is able to resist the horizontal force F1 that pushes the upper beam 22 from left to right.

[0079] In this way, the wooden shear wall 100 of this embodiment transmits the horizontal force F1 transmitted from the column-beam frame 20 to the metal pipes 9 via the gusset plates 10 and nuts 71, resists the force with the elastic force of the rod shafts 65, and absorbs larger forces by plastically deforming. Moreover, the wooden panels themselves are made of CLT or LVL, which have excellent earthquake resistance. Furthermore, the wooden member connecting structure 1 has metal rods 6 extending from the four corners of the wooden panels 32 along the imaginary diagonal line D or diagonally parallel to the imaginary diagonal line D, and the rod shafts 65 expand and contract due to their elastic force. Therefore, the wooden earthquake-resistant wall 100 can resist the horizontal force F1 applied to the column-beam frame 20. When a larger force is applied, the rod shaft portion 65 undergoes plastic deformation and absorbs the force.

[0080] Furthermore, the wooden earthquake-resistant wall 100 has the wooden member connecting structure 1 arranged diagonally from the four corners of the wooden panel 32 toward the center C, so that it is possible to obtain greater strength and higher deformation performance with fewer connecting hardware than when connecting with steel plate insertion drift pin joints and embedded bolt joints.

[0081] Moreover, the grooves 18 of the wooden member-side flange portion 16 of the gusset plate 10 open to the indoor side, and the grooves 18 extend in parallel toward the rear side in a front view, making post-construction possible. In other words, by removing the nuts 71 and washers 8 located on the outside of the imaginary diagonal D from the male nut threads 62 of the metal rods 6 and moving the wooden panel 32 together with the wooden member connecting structure 1 toward the indoor side, the wooden panel 32 can be removed from the column-beam frame 20.

[0082] In addition, since a plurality of wood panels 32 are combined to form one wood-based thick board surface material 31, the wood panels 32 can be provided in any size so that the weight and size (width) of each wood panel 32 can be installed manually. Therefore, the wood panels 32 can be carried in from the entrance on a dolly or the like, and the old wood panels 32 can be carried out. Therefore, the wood earthquake-resistant wall 100 of this embodiment does not require a large lifting machine to lift the wood panels 32, so that the wood earthquake-resistant wall 100 can be renewed even after completion of construction. This allows the damaged wood panels 32 to be replaced with new wood panels 32 when it becomes necessary to replace the wood panels 32 due to, for example, a fire. In addition, when performing earthquake-resistant renovation work, the wood earthquake-resistant wall 100 can be installed as a new load-bearing wall by connecting the gusset plate 10 and the wood panels 32 to the column-beam frame 20 where the normal wall was.

[0083] Figure 10 is a view taken along the arrow SS in Figure 6. In this figure, 1 denotes a wooden member connecting structure, 100 denotes a wooden earthquake-resistant wall, 20 denotes a column-beam frame, 21 denotes a column, 22 denotes a beam, 32 denotes a wooden panel, 33 denotes a slope, 41 denotes a fireproof material, and 42 denotes a sound-absorbing material. In addition, in this figure, 10 denotes a gusset plate, 14 denotes a web, 16 denotes a flange portion on the wooden member side, 17 denotes a rib portion, 18 denotes a groove, 5 denotes a headless lag screw bolt, 6 denotes a metal rod, 65 denotes a rod shaft portion, and 9 denotes a metal pipe. In apartment buildings, the partition walls that separate adjacent units are often used as load-bearing walls. The wooden earthquake-resistant wall 100 in this figure is a partition wall installed between adjacent dwelling units. In general, when using wooden thick board paneling 31 for a wall that is a main structural part, a certain level of fire resistance is required depending on the purpose, size, or region of the building. Furthermore, when using the wooden earthquake-resistant wall 100 as a partition wall, in addition to the fire resistance required for the main structural part, it is also required to have fire resistance to prevent the fire from spreading to adjacent units and sound insulation performance.

[0084] As shown in this figure, when the wooden earthquake-resistant wall 100 of this embodiment is used as a partition wall, the cross-sectional structure is a layered structure in which wood-based thick board panel 31, fire-resistant material 41, sound-absorbing material 42, fire-resistant material 41, and wood-based thick board panel 31 are arranged in that order. That is, inside the column-beam frame 20, a pair of wood-based thick board panels 31 are arranged one on each side of the room inside the dwelling unit, and a pair of fire-resistant materials 41 are arranged between the pair of wood-based thick board panels 31 so as to follow the back side of each of the wood-based thick board panels 31. Sound-absorbing material 42 is arranged between the pair of fire-resistant materials 41. Note that in this drawing, only the sound-absorbing material 42 is shown, but a base material is also arranged at the position where the sound-absorbing material 42 is arranged (for example, the rear side of the sound-absorbing material 42 in this drawing). With this configuration, the wood earthquake-resistant wall 100 has the laminated structure described above.

[0085] The fireproof material 41 may be, for example, a plaster board. The sound absorbing material 42 may be, for example, a glass wool board. Alternatively, instead of arranging the sound absorbing material 42, a gap may be arranged as an air layer for the purpose of sound insulation. The four peripheries of the fireproof material 41 and the sound-absorbing material 42 are in close contact with the inside of the column-beam frame 20. As a result, the two adjacent dwelling units are completely separated by the fireproof material 41 and the sound-absorbing material 42.

[0086] In this way, the wooden earthquake-resistant wall 100 of this embodiment has fire-resistant material 41 and sound-absorbing material 42 between two wooden thick board panels 31, so that the wooden thick board panels 31 can be used in their exposed state while ensuring fire resistance and sound insulation performance. In other words, for example, if a fire breaks out in the apartment on the right side of the figure, even if the wood-based thick board panel 31 on the right side of the figure is burned down, the fire-resistant material 41 on the right side, the sound-absorbing material 42, the fire-resistant material 41 on the left side, and the wood-based thick board panel 31 will remain unburned.

[0087] Therefore, even if the wood-based thick board panel 31 is used in its exposed state, the fireproof material 41 attached to the inside of the wood-based thick board panel 31 can prevent the fire from spreading to the neighboring house, so that the wood earthquake-resistant wall 100 can be used as a partition wall. Even if the right-side wooden thick panel 31 is burned down, the left-side wooden thick panel 31 remains unburned, so that the wooden earthquake-resistant wall 100 can maintain its earthquake resistance as a bearing wall. Therefore, the unburned wooden earthquake-resistant wall 100 can function as a bearing wall until the right-side wooden thick panel 31 is replaced during restoration work.

[0088] In this way, by using the wooden earthquake-resistant wall 100 as a partition wall, even if the wood-based thick board panel 31 is used in its exposed state, the fire resistance, sound insulation, and earthquake resistance of the partition wall can be maintained at a high level.

[0089] (Second Example) Next, a wooden earthquake-resistant wall 100 according to a second embodiment will be described as an example of the wooden member connecting structure 1 according to the first embodiment. Fig. 11 is an enlarged view of the U part in Fig. 6 when the wooden earthquake-resistant wall 100 is the second embodiment. In this figure, the wooden panel 32 is cut vertically on a plane parallel to the front so that the inside of the tip hole 4 can be seen. In Fig. 11, 1 is a wooden member connecting structure, 4 is a tip hole, 4b is the bottom of the tip hole 4, 4c is the opening of the tip hole 4, 5 is a headless lag screw bolt, 52 is a male thread for wood, 53 is the shaft of the headless lag screw bolt 5, 71A is a front nut, 71B is a rear nut, and 71C is an end nut. Also in Fig. 11, 6 is a metal rod, 21 is a column, 22 is a beam, 10 is a gusset plate, 14 is a web portion, 17 is a rib portion, 16 is a flange portion on the wooden member side, 18 is a groove, 32 is a wooden panel, and 100 is a wooden earthquake-resistant wall.

[0090] The second embodiment differs from the first embodiment in the shape of the rib portion 17 of the gusset plate 10 and in the fasteners for fastening the gusset plate 10 to the column-beam frame 20. Unlike the first embodiment, the rib portion 17 of the second embodiment bends as it extends from the flange portion 16 on the wooden member side to the flange portion 15 on the joined member side. Specifically, the portion of the rib portion 17 close to the flange portion 16 on the wooden member side extends perpendicular to the flange portion 16 on the wooden member side from a portion of the flange portion 16 on the wooden member side that does not have grooves 18 or holes 19. The portion of the rib portion 17 close to the flange portion 15 on the joined member side extends perpendicular to the flange portion 15 on the joined member side. A hole 15a through which a bolt 45 passes is provided between the rib portions 17 of the flange portion 15 on the joined member side.

[0091] Due to this shape of the rib portion 17, the rib portion 17 extends avoiding the hole 15a of the flange portion 15 of the joined member and its surroundings, so the bolt 45 protruding from the hole 15a does not hit the rib portion 17. In addition, the bolt 45 protruding from the hole 15a and the portion of the rib portion 17 close to the flange portion 15 of the joined member extend parallel to each other, so that a wide space can be secured between the bolt 45 and the rib portion 17. As a result, there is no risk of the rib portion 17 interfering with the work of attaching the nut 46 to the bolt 45. Other configurations, methods of use, and effects of the second embodiment are similar to those of the first embodiment.

[0092] (Third Example) The wooden member connecting structure 1 may be used for connecting both ends of a column or for the main reinforcement of a beam. The other configurations and effects of the third embodiment are similar to those of the first or second embodiment.

[0093] Second embodiment Next, a wooden member connecting structure 1 according to a second embodiment will be described. Fig. 12 is an enlarged arrow view of part M in Fig. 6 when the wooden member connecting structure 1 of the second embodiment is used in a wooden earthquake-resistant wall 100. In this figure, 1 is the wooden member connecting structure, 2 is the members to be joined, 3 is the wooden members, 3a is the end face, 4 is the tip hole, 4b is the bottom of the tip hole 4, 4c is the opening of the tip hole 4, 5 is the headless lag screw bolt, 6 is the metal rod, 7 is the connector, 9 is the metal pipe, and 10 is the gusset plate.

[0094] The connector 7 of the second embodiment includes a long nut 72 , a headed bolt 73 , a washer 8 , and a gusset plate 10 . The wooden member connecting structure 1 of the second embodiment uses a gusset plate 10 having a hole 19 formed in the wooden member side flange portion 16. The wooden member connecting structure 1 gusset plate 10 having a hole 19 is stronger than a gusset plate 10 having a groove 18, so the rib portion 17 may not be required. The absence of the rib portion 17 allows the gusset plate 10 to be lighter, and the manufacturing cost to be reduced. However, the present invention is not limited to this, and the gusset plate 10 of the second embodiment may have the rib portion 17 as well as the hole 19.

[0095] The long nut 72 has an internal female thread and is longer in the axial direction than the front nut 71A of the first embodiment. The male nut thread 62 of the metal rod 6 is screwed into one end 72a of the long nut 72. Since the axial length of the long nut 72 is longer than that of the front nut 71A of the first embodiment, the depth of the enlarged portion 4e of the tip hole 4 may be set deeper than that of the first embodiment, as shown in the drawing. This provides the effect that the tool T can reach deeper into the tip hole 4 in the repair process than in the first embodiment.

[0096] Furthermore, since the long nut 72 is longer than the front nut 71A of the first embodiment, the metal rod 6 and the metal tube 9 may be shorter than those in the first embodiment. Of course, a metal rod 6 or metal tube 9 of the same length as in the first embodiment can be used in the wooden member connecting structure 1 of the second embodiment, and the tip hole 4 can be made deeper since the long nut 72 is longer than the front nut 71A of the first embodiment.

[0097] The headed bolt 73 may be a high tension bolt made of, for example, high tensile steel having a tensile strength of 490 N / mm2 or more and less than 1,000 N / mm2, or ultra-high tensile steel having a tensile strength of 1,000 N / mm2 or more. Alternatively, the headed bolt 73 may be a medium bolt. The headed bolt 73 has a shaft 73b inserted into a hole 19 in the gusset plate 10. The shaft 73b of the headed bolt 73 that has passed through the hole 19 is screwed into the other end 72b of the long nut 72.

[0098] With this configuration, the wooden member connecting structure 1 of the second embodiment clamps the wooden member side flange portion 16 of the gusset plate 10 in the axial direction of the metal bar 6 between the other end 72b of the long nut 72 and the head 73a of the headed bolt 73. As a result, in the wooden member connecting structure 1 of the second embodiment, similarly to the first embodiment, the force pressing the wooden member side flange portion 16 of the gusset plate 10 toward the bottom side of the tip hole 4 can be transmitted to the metal rod 6 via the long nut 72 instead of the front nut 71A of the first embodiment. As a result, a resistance force R1 that resists the component force F2 is generated in the rod shaft portion 65 of the second embodiment, and this resistance force R1 pushes back the wooden member side flange portion 16.

[0099] Furthermore, when a tensile force acting in a direction away from the wooden member 3 is applied to the gusset plate 10, the wooden member side flange 16 pulls the head 73a of the headed bolt 73 in a direction away from the wooden member 3. This tensile force is transmitted from the shaft 73b of the headed bolt 73 and the long nut 72 to one end 61 of the metal rod 6, stretching the rod shaft 65. As a result, the stretched metal rod 6 tries to return to its original shape due to elastic force, generating a resistance force R2 that pulls the gusset plate 10 toward the bottom side of the tip hole 4. Therefore, the wooden member connecting structure 1 of the second embodiment can also have high deformability like the first embodiment.

[0100] Furthermore, in the wooden member connecting structure 1 of the second embodiment, the wooden member 3 can be removed from the joined members 2 by removing the headed bolts 73 and moving the wooden member 3 parallel to the wooden member-side flanges 16 of the gusset plates 10. That is, in the case of Figure 12, for example, the direction parallel to all of the wooden member-side flanges 16 at the four corners of the wooden panel 32, including the gusset plates 10 not shown in the figure, is the direction perpendicular to the page. By moving the wooden panel 32 in this direction, the wooden panel 32 can be attached to and detached from the column-beam frame 20. Other configurations, connection methods, repair processes, and effects of the second embodiment, and the configurations and effects of the first to third examples of the second embodiment are similar to those of the first embodiment.

[0101] Third embodiment Fig. 13 is a front cross-sectional view of a wooden member connecting structure 1 of a third embodiment. In this figure, 1 is a wooden member connecting structure, 2 is members to be joined, 3 is wooden members, 3a is an end face, 4 is a tip hole, 4b is a bottom of tip hole 4, 4c is an opening of tip hole 4, 5 is a headless lag screw bolt, and 55 is the other end face. In addition, 6 is a metal rod, 71 is a nut, 8 is a washer, 9 is a metal tube, and 10 is a gusset plate. The gusset plate 10 of this embodiment may have either a groove 18 or a hole 19. The wooden member connecting structure 1 of the third embodiment differs from the first embodiment in that it does not have a front nut 71A and a metal tube 9. That is, the wooden member connecting structure 1 of the third embodiment has a nut 71 that screws into the nut male thread 62 only on the joined member side of the groove 18 and hole 19 of the gusset plate 10. The nut 71 is attached so as to contact the flange portion 16 on the wooden member side. Tip hole 4 in this embodiment does not necessarily have to have enlarged portion 4e, but may have enlarged portion 4e.

[0102] 14A and 14B are front cross-sectional views of the wooden member connecting structure 1 of the third embodiment when a large force is applied thereto. Fig. 14A shows the state when a tensile force in a direction away from the wooden member 3 is applied to the gusset plate 10. In the wooden member connecting structure 1 of this embodiment, nuts 71B and 71C are only provided on the joined member side of the wooden member flange 16, and no nut 71A is provided between the gusset plate 10 and the wooden member 3. With this configuration, the tensile force acting in the direction in which the gusset plate 10 moves away from the wooden member 3 is transmitted to the metal rod 6 via the rear nut 71B and end nut 71C, stretching the rod shaft 65. This generates a resistance force R2 in the stretched metal rod 6 that tries to return it to its original shape due to its elastic force, and the metal rod 6 pulls the gusset plate 10 toward the bottom side of the tip hole 4. Therefore, the wooden member connecting structure 1 of the third embodiment can have a deformation performance higher than that of GIR200, although it is not as high as those of the first and second embodiments.

[0103] FIG. 14(B) is a front cross-sectional view of the wooden member connecting structure 1 of the third embodiment when a force pushing toward the wooden member 3 is applied to the gusset plate 10. On the other hand, since the wooden member connection structure 1 of this embodiment does not have the front nut 71A, the force pushing the gusset plate 10 toward the wooden member 3 is not transmitted to the metal rod 6. When a force pushing the gusset plate 10 toward the wooden member 3 is applied to the gusset plate 10, the rear nut 71B and the end nut 71C leave the wooden member side flange portion 16, and one end 61 of the extended metal rod 6 protrudes from the wooden member side flange portion 16. Since one end 61 of the metal rod 6 does not follow the movement of the wooden member side flange portion 16, the rod shaft portion 65 does not bend even if a force pushing the metal rod 6 toward the wooden member 3 is applied to the metal rod 6. Therefore, even if a force pushing the gusset plate 10 toward the wooden member 3 is applied, the metal rod 6 does not buckle, so there is no need to provide a metal tube 9 in the wooden member connection structure 1 of the third embodiment.

[0104] In this way, since the wooden member connecting structure 1 of the third embodiment does not have the front nut 71A and the metal tube 9, the manufacturing costs can be reduced compared to the wooden member connecting structures 1 of the first and second embodiments.

[0105] 5 for the first embodiment, if the metal rod 6 of the third embodiment breaks, there will be a gap 66 around the rod shaft portion 65 of the metal rod 6, the gap having the same width as that after the metal tube 9 is pulled out in the wooden member connection structure 1 of the first embodiment (FIG. 5(B)). Therefore, the gap 66 around the rod shaft portion 65 of the metal rod 6 of the third embodiment is also wide, allowing the tool T to be inserted deep inside. Furthermore, because the headless lag screw bolt 5 is connected to the tissue of the wooden member 3 only in the portion from the center to the bottom 4b in the longitudinal direction of the tip hole 4, the inner diameter near the opening of the tip hole 4 does not affect the performance of the wooden member connecting structure 1. Therefore, an enlarged portion 4e may be provided in the tip hole 4 to widen the inner diameter near the opening so that the tool T can be inserted all the way to the back, and the broken metal rod 6 may be removed. Therefore, in the wooden member connecting structure 1 of this embodiment, even if the metal rod 6 breaks at the rod shaft portion 65, the metal rod 6 can be easily replaced without destroying the wooden member 3, and the headless lag screw bolt 5 and wooden member 3 used before the repair can be reused after the repair.

[0106] In the third embodiment, the wooden member connecting structure 1 has a gusset plate 10 having a groove 18, as in the first embodiment, and the wooden member 3 may be removed from the joined member 2 by removing the rear nut 71B and the end nut 71C and then moving the wooden member 3 along the groove 18. 3 and the metal rod 6 does not come into contact with the flange portion 15 of the joined member or the joined member 2, the wooden member 3 may be removed from the joined member 2 by another method. For example, the wooden member 3 may be removed from the joined member 2 by removing the nuts 71B, 71C, rotating the metal rod 6 to release it from the headless lag screw bolt 5, and pulling the metal rod 6 out of the groove 18 or hole 19 of the gusset plate 10. Other configurations, connection methods, repair processes, and effects of the third embodiment, and the configurations and effects of the first to third examples of the third embodiment are similar to those of the first embodiment.

[0107] According to the present invention described above, both ends of the metal rod 6 are connected to the members 2 and the headless lag screw bolt 5, and the circumferential surface of the rod shaft portion 65 between them passes through the hollow portion 91 of the metal pipe 9 and is not fixed to anything. Therefore, when a large force is applied in a major earthquake or the like, the rod shaft portion 65 of the wooden member connecting structure 1 of the present invention can absorb energy because the rod shaft portion 65 can expand and contract in its axial direction. This allows the wooden member connecting structure 1 of the present invention to have large deformation performance.

[0108] The metal rod 6 is indirectly connected to the wooden member 3 by being screwed into the headless lag screw bolt 5 screwed into the wooden member 3. Therefore, by simply turning the metal rod 6 in the reverse direction, the metal rod 6 can be easily removed from the wooden member 3 without damaging the wooden member 3, and replaced with a new metal rod 6.

[0109] Moreover, in the wooden member connecting structure 1 of the first and second embodiments, the headless lag screw bolt 5 and the metal pipe 9 are configured as separate parts, so that the metal pipe 9 can be easily removed from the tip hole 4. This allows the gap 66 around the rod shaft portion 65 to be widened, so that a tool T can be inserted into the gap 66 to grasp the broken rod shaft portion 65, rotate it around its axis, and release the headless lag screw bolt 5 from the screw engagement and remove it from the tip hole 4. Also, in the wooden member connecting structure 1 of the third embodiment, the gap 66 around the rod shaft portion 65 is kept wide, so that the broken rod shaft portion 65 can be easily removed by inserting a tool T into the gap 66. Therefore, in the wooden member connecting structure 1 of the present invention, even if the metal rod 6 breaks at the rod shaft portion 65, the metal rod 6 can be easily removed from the tip hole 4 without destroying the wooden member 3. In addition, because the metal rod 6 can be replaced without destroying the wooden members 3, the headless lag screw bolts 5 and wooden members 3 used before the repair can continue to be used as the same parts even after the repair. Therefore, the wooden member connection structure 1 allows the wooden members 3 to be reused even after the repair.

[0110] Furthermore, all of the components 5, 6, 7, 9, and 10 of the wooden member connecting structure 1 are made of metal and do not use the epoxy resin 400, so that all of the components can be reused as metal materials. Therefore, since all of the parts 5, 6, 7, 9, 10 as well as the wooden member 3 of the wooden member connecting structure 1 are reusable, it is possible to provide a building with a low environmental impact.

[0111] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0112] 1 Wooden member connection structure, 2 Parts to be joined, 3 wood member, 3a end face, 4 tip hole, 4a inner wall surface, 4b bottom, 4c opening, 4d gap, 4e enlarged portion, 5 Headless lag screw bolt, 51 female thread, 52 male thread for wood, 53 shaft portion, 54 one end surface, 55 other end surface, 6 metal rod, 61 one end, 62 male thread for nut, 63 other end, 64 male thread for bolt, 65 rod shaft, 66 gap around the rod shaft, 7 Connector, 71 Nut, 71A Front Nut, 71B Rear Nut, 71C End Nut, 72 long nut, 72a one end of the long nut, 72b the other end of the long nut, 73 Head bolt, 73a Head of head bolt, 73b Head bolt shaft, 8 washers, 9 Metal tube, 91 Hollow part, 92 Other end surface, 93 One end surface, 10 gusset plate, 14 web portion, 15 Flange portion of the joined member side, 15a: a hole provided in the flange portion of the joined member; 16 Wooden member side flange portion, 17 rib portion, 18 groove, 18a groove opening, 19 hole, 20 Column-beam frame, 21 Column, 22 Beam, 31 Wood-based thick board surface material, 32 Wood panels, 32A 1,575mm wide wood panel, 32B: 787.5mm wide wood panel, 32C 1,000mm wide wood panel, 33 bevel, 34 top surface, 35 side surface, 36 notch, 41 Fireproof materials, 42 Sound absorbing materials, 43 Gaps between the column-beam frame and the wood panel, 44 Headed stud, 45 Bolt, 46 Nut, 100 Wood shear wall, 200 GIR, 231 Crack, 260 Steel Bars, 300 GIUA, 360 Steel Bar, 370 Unbonded Part, 400 epoxy resin, 500 Conventional joint structure using metal connectors, 550 screw member, 551 female thread, 552 hollow hole, 554 end surface, 560 Long bolt, 563 Tip, 564 Male thread, 565 Shaft, 566 A gap between the inner surface of the hollow hole of the screw member and the side of the shaft of the long bolt; A is the imaginary center line of the beam, B Imaginary vertical line, C The center of the wood panel, which is the intersection of the imaginary diagonals. D virtual diagonal, F1 Horizontal force pushing the beam horizontally, F2,F3 are components of horizontal force parallel to the imaginary diagonal D, R1, R2: Resistance force generated in wooden shear walls against horizontal force, T-tool, X Thickness direction of wood panel

Claims

1. A wooden member connecting structure for connecting a wooden member and a connected member, a gusset plate having a wooden member side flange portion fixed to the joined member and extending parallel to an end surface of the wooden member; a headless lag screw bolt made of metal, the headless lag screw bolt having a male thread for wood provided on the peripheral surface of the shaft portion and a female thread provided in the axial direction from one end face, the headless lag screw bolt being screwed from the other end face side of the shaft portion into the bottom side of a pilot hole opening on the end face of the wooden member, the headless lag screw bolt being embedded in the range from the center to the bottom in the longitudinal direction of the pilot hole; A metal rod made of metal having a male thread for a nut provided at one end, a male thread for a mating bolt provided at the other end and capable of being screwed into the female thread, and a rod-shaped rod shaft portion extending linearly between the male thread for the nut and the male thread for the mating bolt; A wooden member connecting structure comprising: a metal connecting device that detachably connects the male nut screw to the wooden member side flange portion.

2. a hollow cylindrical metal tube made of metal having an inner diameter larger than the maximum diameter of the metal rod and an outer diameter smaller than the inner diameter of the tip hole, The wooden member side flange portion has a groove through which the metal rod passes, The connector has a plurality of nuts that screw into the male nut threads inserted into the grooves and sandwich the wooden member flange portion in the axial direction of the metal rod, 2. The wooden member connecting structure according to claim 1, wherein the metal pipe surrounds the rod shaft portion within the tip hole on the opening side of the headless lag screw bolt with the metal rod passed through the hollow portion.

3. a hollow cylindrical metal tube made of metal having an inner diameter larger than the maximum diameter of the metal rod and an outer diameter smaller than the inner diameter of the tip hole, The wooden member side flange portion has a hole through which the metal rod passes, The connector includes a long nut having an internal female thread and one end of which is screwed onto the nut male thread, and a headed bolt having a shaft inserted into and passing through the hole and screwed onto the other end of the long nut, The metal tube surrounds the rod shaft portion within the tip hole on the opening side of the headless lag screw bolt with the metal rod passed through the hollow portion, 2. The wooden member connecting structure according to claim 1, wherein the long nut and the head of the headed bolt sandwich the wooden member side flange portion in the axial direction of the metal bar.

4. The wooden member side flange portion has a groove or a hole through which the metal rod passes, 2. The wooden member connecting structure according to claim 1, wherein the connecting device has a nut that contacts the wooden member flange portion and screws onto the nut male thread only on the joined member side of the groove or hole.

5. 2. The wooden member connecting structure according to claim 1, wherein the strength of the metal rod is smaller than the fixing strength of the headless lag screw bolt to the wooden member.

6. 4. The wooden member connecting structure according to claim 2, wherein the axial length of the metal pipe is shorter than the distance from the one end face of the headless lag screw bolt screwed into the pilot hole to the connector.

7. The wooden member connection structure according to claim 1, wherein all grooves of the wooden member side flange portions of all the gusset plates connected to one of the wooden members extend parallel to each other in a direction in which the wooden members can move and have openings facing in the same direction.

8. 2. The wooden member connecting structure according to claim 1, wherein the end hole has an enlarged portion at its opening end, the enlarged portion having an inner diameter larger than the outer diameter of the connector between the wooden member side flange portion and the wooden member, and the inner diameter is larger than the range from the center to the bottom of the end hole.

9. A wooden earthquake-resistant wall comprising the wooden member connection structure according to claim 1, A wood-based thick board surface material composed of a plurality of wood panels aligned flush in the horizontal direction when viewed from the front; A column-beam frame of reinforced concrete or steel-reinforced concrete construction surrounding the four periphery of the wood-based thick board surface material; A plurality of the gusset plates fixed to the inside of the column-beam frame; The wooden member connecting structure is disposed diagonally from the four corners of each wooden panel toward the center of the wooden panel, and connects the gusset plate and each wooden panel, The wooden member is the wood panel, A wooden earthquake-resistant wall, wherein the joined members are the column-beam frames.

10. The wood panel has a notch at each of the four corners, the notch having a slope that intersects with the upper or lower surface and the side surface, 10. The wooden earthquake-resistant wall according to claim 9, wherein the end face of the wooden member where the pilot hole is opened is the inclined surface.

11. The wooden member connecting structure according to claim 1 , wherein the wooden members are made of CLT or LVL.

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