Wooden member connecting members, wooden seismic-resistant members, and the high nuts and lag screw bolts that make them up.

Abstract

This invention provides wooden member connecting members, wooden seismic-resistant members, and high nuts and lag screw bolts that constitute them, which are less prone to buckling than conventional materials. [Solution] The device comprises a bolt 1 that engages with a gusset plate 9, a lag screw bolt 5 fixed to the bottom 4a side of the pilot hole 4 and having a hollow portion 55 that opens to the rear end 54 of the screw, a rod 6 having first threaded portions S1 and second threaded portions S2 at both ends 6a and 6b that screw into a high nut 7 and the lag screw bolt 5, and an expandable portion E extending between them, and a high nut 7 that screws into the bolt 1 and the rod 6, all arranged coaxially Q with the pilot hole 4. The high nut 7 or the lag screw bolt 5 has a non-threaded portion N within the hollow portions 71, 55 that allows displacement of the expandable portion E in the axial direction Z. The high nut 7 has a length L longer than the maximum assumed extension length MAX of the expandable portion E inserted into the pilot hole 4, and its displacement direction is constrained to the axial direction Z by the inner surface 4d of the pilot hole 4.

Description

Technical Field

[0001] The present invention relates to a wooden member connecting member, a wooden seismic member, and the high nuts and lag screw bolts constituting them.

Background Art

[0002] In recent years, in order to contribute to the realization of carbon neutrality and the prevention of global warming, the use of wood in buildings has been demanded. As part of this, a connecting member that joins a reinforced concrete structure and a wooden member with a metal joining tool is disclosed in, for example, Patent Document 1.

[0003] FIG. 1 is a partial cross-sectional view of a conventional connecting member 500 that connects a joined member 2 and a wooden member 3 using only a metal joining tool. FIG. 1(A) is a partial cross-sectional view of the connecting member 500, FIG. 1(B) is a partial enlarged view of FIG. 1(A), and FIG. 1(C) is a partial enlarged view of FIG. 1(A) showing the state when a repeated load acts during an earthquake. In the conventional connecting member 500, a single steel bar 560 and two nuts 570A, 570B connect a gusset plate 509 fixed to the joined member 2 and a screw member 550 embedded in the wooden member 3. At that time, the gusset plate 509 was sandwiched between two nuts 570A, 570B screwed onto the steel bar 560, and one end of the steel bar 560 was connected to the joined member 2. The connection between the other end of the steel bar 560 and the wooden member 3 was made by screwing the other end of the steel bar 560 into the female thread 557 of the hollow hole 552 of the screw member 550 embedded in the wooden member 3. With this structure, the conventional connecting member 500 absorbed the kinetic energy during an earthquake by the elongation of the steel bar 560.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

[0005] As shown in Figure 1, in the conventional connecting member 500, the nut 570A on the wooden member 3 side is embedded in a pre-drilled hole 4 provided in the wooden member 3. Conventionally, when a large tensile force is applied to the steel rod 560 due to an earthquake, the steel rod 560 between the female thread 557 of the screw member 550 and the nuts 570A and 570B stretches, as shown in Figure 1(C), and the nut 570A comes out of the pre-drilled hole 4. Once the nut 570A comes out of the pre-drilled hole 4, it is no longer constrained radially by the pre-drilled hole 4 and can move in any direction. As a result, the nut 570A that emerged from the pilot hole 4 would detach from the shaft Q of the pilot hole 4 and be unable to return to the pilot hole 4, or excessive force would be applied to the shaft of the steel rod 560 due to the compressive force being applied while both ends were not coaxial, causing the steel rod 560 to buckle.

[0006] This invention was devised to solve the problems described above. In other words, the objective of this invention is to provide wooden member connecting members, wooden seismic-resistant members, and high nuts and lag screw bolts that constitute them, which are less prone to buckling than conventional ones. [Means for solving the problem]

[0007] According to the present invention, a wooden member connecting member for joining a wooden member and a member to be joined, A gusset plate fixed to the member to be joined, A bolt that engages with the gusset plate, A tall nut that is screwed onto the aforementioned bolt, A lag screw bolt having a male screw for wood provided on the circumferential surface of the shaft, fixed to the bottom side of a pre-drilled hole opening in the open end face of the wooden member, a hollow portion opening at the rear end of the screw, and a female screw portion provided in the hollow portion, The rod material comprises a rod tip and the female screw portion of the lag screw bolt, which are screwed together, and a second screw portion, which are screwed together, with an expandable portion between the rod tip and the high nut, The bolt, the tall nut, the rod, and the lag screw bolt share the same axis as the pre-drilled hole. Furthermore, the wooden member connecting member is provided with a non-threaded portion in either the hollow portion of the tall nut or the hollow portion of the lag screw bolt, or both, that allows displacement of the expansion and contraction portion in the axial direction of the pre-drilled hole. The tall nut is inserted into the pre-drilled hole to a length longer than the maximum expected extension length of the expandable portion, and the direction of displacement is constrained to the axial direction by the inner surface of the pre-drilled hole, thereby providing a wood member connecting member.

[0008] Furthermore, according to the present invention, a wooden seismic-resistant member comprising the wooden member connecting member described above, A wood-based thick panel surface consisting of multiple wood panels arranged horizontally in a front view, or a single wood panel, The aforementioned thick wooden panel is surrounded on all four sides by a reinforced concrete, steel-reinforced concrete, or steel-framed column and beam frame, The system includes wooden connecting members that are positioned diagonally from the four corners of each wooden panel toward the center of the wooden panel, connecting the column and beam frame to each wooden panel. The aforementioned wooden member is the aforementioned wooden panel, The member to be joined is the column-beam frame, A wooden seismic-resistant member is provided, on the inside of the column-beam frame, to which a plurality of the gusset plates are fixed.

[0009] Furthermore, according to the present invention, the lag screw bolt that constitutes the wooden member connecting member described above is The lag screw bolt has the screw female thread portion located at the tip of the hollow portion, The lag screw bolt has a hollow enlarged diameter portion that extends axially between the rear end of the screw and the female thread portion of the screw, and whose minimum inner diameter is larger than the maximum diameter of the first threaded portion of the rod or the maximum inner diameter of the female thread portion of the screw. The lag screw bolt is provided in which the hollow, enlarged diameter portion of the lag screw bolt limits the displacement of the expansion and contraction portion in the radial direction around the axis.

[0010] Furthermore, according to the present invention, the wooden member connecting member and the wooden member described above are provided. The aforementioned wooden member is a column or a beam, and a wooden seismic-resistant member is provided.

[0011] Furthermore, according to the present invention, a hollow portion that penetrates axially from one end to the other end, A nut female thread portion is provided at one end of the hollow portion, The hollow portion comprises a high nut hollow enlarged diameter portion that extends in the axial direction from the other end to the nut female thread portion, A tall nut is provided in which the minimum inner diameter of the hollow enlarged portion of the tall nut is larger than the maximum inner diameter of the female thread portion of the nut. [Effects of the Invention]

[0012] According to the present invention described above, since the tall nut is inserted into the pre-hole over a range longer than the maximum expected extension length of the telescopic part, the tall nut will not come out of the pre-hole even when the rod is extended to its maximum extent. Therefore, it is possible to prevent buckling of the rod material caused by the high nut, which has come out of the pre-drilled hole, being unable to return to the pre-drilled hole when subjected to compressive force.

[0013] Furthermore, the tip of the rod of the lag screw bolt that screws onto it is fixed coaxially with the pre-drilled hole. Because the rod is positioned coaxially with the pre-drilled hole, the rod extends axially along the axis. The rear end of the rod is screwed onto a tall nut that is screwed onto the bolt, and the bolt and tall nut are also positioned coaxially with the pre-drilled hole. The inner surface of the pre-drilled hole then restrains the direction of displacement of the tall nut in the axial direction. In this invention, the pre-drilled hole not only functions as a hole for fixing the wooden member connecting member inside the wooden member, but also as a guide that directs the movement of the tall nut only in the axial direction.

[0014] In this configuration, the rod material has both ends always on the axis, and the movement of the rear end of the rod is restricted to the axial direction as it extends and retracts. Therefore, the wooden member connecting member of the present invention can prevent the bar material from buckling due to the deviation of the center of the rear end of the bar.

[0015] Furthermore, the wooden member connecting member of the present invention has an expansion and contraction portion between a first screwing portion that is screwed into a lag screw bolt and a second screwing portion that is screwed into a high nut. And the wooden member connecting member of the present invention has a non-screwing portion that allows displacement in the axial direction of the expansion and contraction portion in either one or both of the hollow portions of the high nut and the hollow portion of the lag screw bolt. That is, the wooden member connecting member of the present invention has a portion (non-screwing portion) that is in the hollow portion of the high nut or the lag screw bolt but not screwed with the high nut or the lag screw bolt in the expansion and contraction portion of the bar material. And both the high nut and the lag screw bolt are arranged coaxially with the pilot hole.

[0016] Therefore, when a compressive force is applied to the wooden member connecting member due to an earthquake, the high nut or the lag screw bolt with the non-screwing portion prevents the bar material from moving radially with respect to the axis and coming off the axis. Thereby, the wooden member connecting member of the present invention can also prevent the buckling of the bar material due to the deviation of the center of the expansion and contraction portion.

Brief Description of the Drawings

[0017] [Figure 1] It is a partial cross-sectional view of a conventional connecting member that connects a joined member and a wooden member using only a metal joining tool. [Figure 2] It is a right-side cross-sectional view of the wooden member connecting member of the first embodiment. [Figure 3] It is a right-side cross-sectional view of the wooden member connecting member of the first embodiment comparing before receiving a tensile force and when receiving a tensile force. [Figure 4] It is a right-side cross-sectional view of the wooden member connecting member of the first embodiment comparing before receiving a compressive force and when receiving a compressive force. [Figure 5] It is an explanatory view of the non-screwing portion of the first to third embodiments. [Figure 6] It is an explanatory view of the non-screwing portion of the fourth to sixth embodiments. [Figure 7] This is an explanatory diagram of the method for connecting wooden member connecting members according to the first embodiment. [Figure 8] This is a front view of the wooden seismic-resistant member of the first embodiment as seen from the interior. [Figure 9] This is an enlarged cross-sectional view of portion M in Figure 8 of the wooden seismic-resistant member of the first embodiment, which uses the wooden member connecting member of the first embodiment. [Figure 10] This is an explanatory diagram of the resistance mechanism of the wooden seismic-resistant member of the first embodiment. [Figure 11] This is a view from the SS arrow in Figure 8. [Figure 12] This is an enlarged cross-sectional view of portion M in Figure 8 of the wooden seismic-resistant member of the second embodiment, which uses the wooden member connecting member of the second embodiment. [Figure 13] Figure 12 shows a view along the JJ arrow and a cross-sectional view along the KK line. [Figure 14] (A) A right side cross-sectional view of the wooden member connecting member of the third embodiment, (B) a front cross-sectional view of the tall nut of the wooden member connecting member of the third embodiment, (C) a view from arrow II in Figure 14(B) (plan view), and (D) a front view. [Figure 15] This is a right-side cross-sectional view of a wooden member connecting member of a fourth embodiment for illustrating the absorption of compressive force. [Modes for carrying out the invention]

[0018] Embodiments of the present invention will be described below with reference to the drawings. Common parts in each figure are denoted by the same reference numerals, and redundant explanations are omitted.

[0019] (First Embodiment) Figure 2 is a right side cross-sectional view of the wooden member connecting member 10 of the first embodiment. Figure 2(A) is a right side cross-sectional view cut to show the outer shapes of the tall nut 7 and lag screw bolt 5. In this figure, 10 is the wooden member connecting member, 2 is the member to be joined, 3 is the wooden member, 3a is the open end face, 4 is the pre-drilled hole, and 11 is the washer. The wooden member connecting member 10 in this embodiment is a connecting member that joins the wooden member 3 and the member to be joined 2. The member to be joined 2 may be, for example, a reinforced concrete, steel-reinforced concrete, steel frame, metal, or wooden member.

[0020] The wooden component 3 may be solid wood, LVL (laminated veneer lumber), CLT (cross-laminated timber), or other laminated timber. CLT is a wood-based panel made by gluing together layers of sawn timbers or small timbers so that the direction of the boards is perpendicular to that of each layer. LVL is a wood-based panel made by laminating and gluing together veneers with the grain direction aligned. Both CLT and LVL are characterized by their high seismic resistance and fire resistance. The wooden member 3 is provided with a pre-drilled hole 4. The pre-drilled hole 4 is provided with a diameter large enough to accommodate a lag screw bolt 5, and is an opening on the end face of the wooden member 3 with a closed bottom 4a. Hereinafter, the end face of the wooden member 3 where the pre-drilled hole 4 is located will be referred to as the "open end face 3a". Preferably, the inner surface 4d of the pre-drilled hole 4 is a cylindrical surface extending in the axial direction Z.

[0021] Furthermore, in the following explanation, the direction in which the axis Q of the pilot hole 4 extends is called the axial direction Z, the direction in the axial direction Z where the bottom 4a of the pilot hole 4 is located is called the "tip side", and the direction opposite to the tip side in the axial direction Z is called the "rear end side". In addition, in the following explanation, the end of the lag screw bolt 5 that faces the tip side when inserted into the pilot hole 4 is called the screw tip 56, and the end on the opposite side is called the screw rear end 54.

[0022] The wooden member connecting member 10 of the first embodiment comprises a bolt 1, a lag screw bolt 5, a rod 6, a tall nut 7, and a gusset plate 9. The bolt 1, the hole 91a in the gusset plate 9 through which the bolt 1 passes, the tall nut 7, the rod 6, and the lag screw bolt 5 are arranged in this order in the axial direction Z from the rear end, and their respective axes are arranged to be coaxial with the axis Q of the pre-drilled hole 4. Since the pre-drilled hole 4, the hole 91a in the gusset plate 9, and these parts 1, 7, 6, and 5 are coaxial, the same symbol Q will be used to denote the axis of these parts 1, 7, 6, 5 and the hole 91a in the following description.

[0023] The lag screw bolt 5 of this embodiment is a fastener that lacks a hexagonal nut at the head and has a wood-cutting male thread 52 around the shaft portion 51. The lag screw bolt 5 is screwed into the pre-drilled hole 4 from the screw tip portion 56 using a special machine and fixed to the bottom 4a side of the pre-drilled hole 4. This fixes the lag screw bolt 5 coaxially with the pre-drilled hole 4. By screwing the lag screw bolt 5 into the pre-drilled hole 4 of the wooden member 3, the wood-cutting male thread 52 provided on the circumferential surface of the shaft portion 51 engages with the wood structure, preventing the lag screw bolt 5 from coming loose. Furthermore, the lag screw bolt 5 is fixed to the pre-hole 4 with the screw rear end 54, where the hollow portion 55 opens, facing the rear end of the pre-hole 4.

[0024] The inner diameter of the pilot hole 4 may be the same as the outer diameter (root diameter dimension) of the thread root of the lag screw bolt 5. However, if the lag screw bolt 5 does not come out of the wood member 3 even when a large force is applied, the inner diameter of the pilot hole 4 may be the length between the maximum diameter of the lag screw bolt 5 (outer diameter of the wood male thread 52) and the root diameter dimension of the wood male thread 52.

[0025] The rod 6 is a metal rod-shaped member that is thinner than the lag screw bolt 5 and has male threads 61 and 62 at at least both ends 6a and 6b. The rod 6 is inserted into the pilot hole 4 from the end with the male thread 61 that screws onto the lag screw bolt 5. In the following description, the end that screws onto the lag screw bolt 5 is called the "rod tip 6a," and the end that screws onto the tall nut 7 is called the "rod rear end 6b."

[0026] The strength of the rod 6 is set to be less than the anchoring strength of the lag screw bolt 5 to the wooden member 3. The strength of the rod 6 can be increased or decreased by changing the strength of the material of the rod 6 and the thickness of the rod 6. The material of the rod 6 is preferably steel, but it may be stainless steel or other metals.

[0027] Furthermore, the bar material 6 is manufactured to have elongation capacity. For example, the material of the bar material 6 is preferably rolled steel bar for building structures with excellent tensile strength (e.g., SNR490B). The male threads 61 and 62 are preferably rolled threads that do not break in any part until the bar material 6 has undergone sufficient plastic deformation. The bar material 6 may have the same thread configuration, thickness, or material as the male threads 61 and 62.

[0028] The tall nut 7 has a hollow portion 71 that penetrates axially Z from one end 7a to the other end 7b. Inside the hollow portion 71, there is a female nut thread portion 72 into which both the male thread 62 of the rear end 6b of the rod material 6 and the bolt 1 can be screwed. This allows the tall nut 7 to be positioned and connected coaxially with the rod 6 and the bolt 1. The tall nut 7 is preferably made of carbon steel or stainless steel. The outer surface of the tall nut 7 is a cylindrical surface or a plurality of planes extending parallel to the axis Q. The tall nut 7 may be, for example, a hexagonal nut that is long in the axial direction Z.

[0029] The bolt 1 is inserted into the hole 91a of the gusset plate 9 and engages with the gusset plate 9 by screwing it onto one end 7a of the tall nut 7 located beyond the hole 91a. Bolt 1 is preferably a high-strength bolt with greater tensile strength than the rod 6.

[0030] The gusset plate 9 is a metal fitting made of steel or the like, which is fixed to the member to be joined 2. Preferably, the gusset plate 9 is fixed to the member to be joined 2 by a headed stud 44 or a bolt. The gusset plate 9 also has a flange portion 91 on the wood member side, a flange portion 92 on the member to be joined side, and a web portion 93.

[0031] The wooden member side flange portion 91 is a flange that extends parallel to the open end surface 3a of the wooden member 3 at a position facing the open end surface 3a, and is provided with a hole 91a through which the bolt 1 passes. Because the portion of the gusset plate 9 that engages with the bolt 1 is a through hole (hole 91a), the engagement portion between the bolt 1 and the gusset plate 9 is prevented from shifting radially around axis Q, thereby preventing buckling of the wooden member connecting member 10.

[0032] The flange portion 92 on the joined member side is a flange that extends along the joined member 2. The web portion 93 is a plate-shaped portion that extends between the flange portion 92 on the joined member side and the flange portion 91 on the wood member side.

[0033] Figure 2(B) is a right-side cross-sectional view taken to show the hollow portion 71 of the tall nut 7 and the hollow portion 55 of the lag screw bolt 5. In this figure, S1 represents the first threaded portion, S2 the second threaded portion, S3 the third threaded portion, E the expansion portion, N the non-threaded portion, and T the shrinkage allowance. The first threaded portion S1 is the axial Z range in which the male thread 61 on the tip 6a of the rod material 6 and the female thread 57 of the lag screw bolt 5 are screwed together. The second threaded portion S2 is the axial Z range in which the male thread 62 on the rear end 6b of the rod material 6 and the female thread 72 of the high nut 7 are screwed together.

[0034] The wooden member connecting member 10 has a range (non-threaded portion N) between the first threaded portion S1 and the second threaded portion S2 where the rod 6 is screwed onto the high nut 7 and the lag screw bolt 5, and inside the hollow portions 55, 71, where the rod 6 is not screwed onto the high nut 7 and the lag screw bolt 5. In the example shown in Figure 2(B), two non-threaded portions N are provided, one inside the hollow portion 55 of the lag screw bolt 5 and the other inside the hollow portion 72 of the tall nut 7.

[0035] The tip 6a of the rod 6 is provided with a male thread 61 that can be screwed onto the lag screw bolt 5, and the rear end 6b of the rod is provided with a male thread 62 that can be screwed onto the tall nut 7. By screwing the male thread 61 into the female thread portion 57 of the lag screw bolt 5, the rod 6 and the lag screw bolt 5 can be screw-fitted together. The female thread portion 57 of the lag screw bolt 5 is provided coaxially with the shaft portion 51 of the lag screw bolt 5. Therefore, by simply screwing the rod 6 into the female thread portion 57 of the lag screw bolt 5, the rod 6 and the lag screw bolt 5 can be connected coaxially. As a result, even if the lag screw bolt 5 is in a place that is not directly visible to a person, such as the bottom of the pilot hole 4 as shown in the figure, it can always be connected coaxially by simply inserting the tip portion 6a of the rod into the lag screw bolt 5 and screwing it in.

[0036] Depending on the shape of the hollow portions 71 and 55 of the tall nut 7 and lag screw bolt 5 to which the rod material 6 is combined, the rod material 6 may have male threads 61 and 62 only at both ends 6a and 6b, as shown in Figure 2(B), or it may be threaded all the way through. Furthermore, the rod 6 has an expandable section E between the first threaded section S1 and the second threaded section S2. When a tensile force is applied due to an earthquake or the like, the expandable section E stretches and can absorb the tensile force.

[0037] The female thread portion 72 of the tall nut 7 is provided on at least one end 7a side of the hollow portion 71. For example, as shown in Figure 2(B), the tall nut 7 may have a hollow portion 71 with a female threaded portion 72 and a tall nut hollow enlarged diameter portion 73 extending axially Z from the other end 7b to the female threaded portion 72. In this case, the minimum inner diameter of the tall nut hollow enlarged diameter portion 73 is set to be larger than the maximum diameter of the rod material 6 of the second threaded portion S2 (i.e., the outer diameter of the male thread 62 at the rear end 6b of the rod) or the maximum inner diameter of the hollow portion 72 in the second threaded portion S2 (i.e., the root diameter of the female threaded portion 72).

[0038] With this configuration, if the rod material 6 has a constant maximum diameter from the tip 6a to the rear end 6b, the rod material 6 cannot come into contact with the inner circumferential surface of the hollow enlarged diameter portion 73 of the high nut, regardless of whether the rod material 6 is fully threaded or only has male threads at both ends 6a and 6b. Therefore, the wooden member connecting member 10 can form a non-threaded portion N in the hollow enlarged diameter portion 73 of the high nut. In other words, the non-threaded portion N provided inside the hollow portion 72 of the high nut 7 is located in the range between the second threaded portion S2 and the other end 7b (tip of the high nut 7b) which is located closer to the tip than the second threaded portion S2. It goes without saying that even if the shaft portion 63 between the male threads 61 and 62 at both ends 6a and 6b of the rod material 6 is smaller than the maximum diameter (outer diameter) of the male threads 61 and 62, a non-threaded portion N will be formed in the hollow enlarged diameter portion 73 of the high nut.

[0039] The lag screw bolt 5 of this embodiment has a hollow portion 55 extending in the axial direction Z, and a screw female thread portion 57 provided on the inner circumferential surface of the hollow portion 55. The hollow portion 55 and the screw female thread portion 57 are provided coaxially with the lag screw bolt 5. The hollow portion 55 must open at least to the rear end 54 of the screw, as shown in Figure 2(B), but it may also extend in the axial direction Z and penetrate to the screw tip 56.

[0040] The female screw portion 57 is configured to be screwable with the rod 6, and by screwing it with the rod 6, it forms the first screw portion S1. The female screw thread portion 57 is provided at least on the screw tip 56 side of the hollow portion 55. Depending on the shape of the rod material 6 to be combined, the female screw thread portion 57 may be provided over the entire hollow portion 55.

[0041] For example, as shown in Figure 2(B), a non-threaded portion N may be formed by providing a hollow enlarged diameter portion 58 of the lag screw bolt 5 in the hollow portion 55 on the rear end side of the female screw portion 57. The hollow enlarged diameter portion 58 of the lag screw bolt is a portion of the hollow portion 55 in which the minimum inner diameter is larger than the maximum diameter of the first threaded portion S1 of the rod material 6 (i.e., the outer diameter of the male thread 61 at the tip portion 6a of the rod) or the maximum inner diameter of the female screw portion 57 (i.e., the root diameter). As a result, a non-threaded portion N is formed in the area between the screw female thread portion 57 located at the tip of the hollow portion 55 of the lag screw bolt 5 and the screw rear end portion 54. In the following description, when referring to the high nut hollow enlarged diameter portion 73 and the lag screw bolt hollow enlarged diameter portion 58 collectively, they will simply be referred to as "hollow enlarged diameter portion 73, 58".

[0042] Bolt 1 is preferably a high-strength bolt with a tensile strength greater than that of the bar material 6. Bolt 1 may be a high-tension bolt made of high-tensile steel with a tensile strength of 490 N / mm2 or more and less than 1,000 N / mm2, or ultra-high-tensile steel with a tensile strength of 1,000 N / mm2 or more, or it may be a medium-strength bolt.

[0043] As shown in Figure 1(C), when tension is applied to the steel rod 560 of the conventional connecting member 500 due to an earthquake or the like, the portion screwed into the female thread hardly elongates, and only the portion not screwed into the female thread elongates. This "portion not screwed into the female thread" includes two locations: the shaft portion between the female thread and nut 570A of the screw member 550 (hereinafter referred to as the intermediate shaft portion 561), and the shaft portion between the two nuts 570A and 570B (the inter-nut shaft portion 563). In other words, when tension is applied to the steel rod 560 of the conventional connecting member 500, not only the intermediate shaft portion 561 of the steel rod 560 but also the inter-nut shaft portion 563 elongates. Once the steel rod 560 stretches, it attempts to return to its original length due to elastic force, but it cannot return to its complete original length. Therefore, once it stretches, the nut-interval shaft portion 563 of the steel rod 560 remains stretched, widening the gap between the two nuts 570A and 570B, preventing the gusset plate 509 from being sandwiched, and loosening the connection between the joined member 2 and the steel rod 560. As a result, when compressive force is subsequently applied to the steel rod due to repeated loads during an earthquake, the steel rod 560 shifts in the axial direction Z by the length that the nut-interval shaft portion 563 has stretched, which reduces the amount of compressive force that the conventional connecting member 500 can absorb.

[0044] Furthermore, the nut-to-nut shaft portion 563 stretched, preventing the nuts 570A and 570B from gripping the gusset plate 509. This caused the steel rod 560 to oscillate within the hole 509a of the gusset plate 509, leading to buckling before it could exert its compressive force absorption capacity. On the other hand, if a metal with high tensile strength is selected for the steel rod 560 in order to prevent the elongation of the inter-nut shaft portion 563 of the conventional connecting member 500, then the intermediate shaft portion 561 of the steel rod 560 will also not elongate, resulting in a problem where it will not be able to absorb tensile force.

[0045] In contrast, the wooden member connecting member 10 of this embodiment engages with the gusset plate 9 using a high-strength bolt 1 and a high nut 7, and can further connect a rod 6 made of steel or stainless steel (for example, SNR490B) with excellent tensile strength to the high nut 7. In other words, by connecting in this manner, the wooden member connecting member 10 can construct the expandable portion E, which corresponds to the conventional intermediate shaft portion 561, with a rod 6 with excellent tensile strength, and the range corresponding to the conventional inter-nut shaft portion 563 can be constructed with the shaft portion 1a of the high-strength bolt 1, which has greater tensile strength than the rod 6. In the wooden member connecting member 10 of this embodiment, the "range corresponding to the conventional inter-nut shaft portion 563" is the range of the shaft portion 1a of the bolt 1 between the third threaded portion S3 between the bolt 1 and the high nut 7 and the head 1b of the bolt 1.

[0046] This configuration ensures that the wooden member connecting member 10 does not loosen the connection between the gusset plate 9 and the bolt 1 even when subjected to tensile forces such as earthquakes. Therefore, the shaft portion 1a of the rod 6 and the bolt 1 does not detach from the axis Q, making it less prone to buckling. In addition, the wooden member connecting member 10 allows the rod 6 to absorb both tensile and compressive forces by connecting the high-strength bolt 1 and the rod 6 with a high nut 7.

[0047] It is preferable that the hollow, enlarged diameter portion 73 of the tall nut restricts (limits) the direction in which the rod 6 located at the non-threaded portion N of the tall nut 7 (i.e., the expandable portion E located inside the hollow portion 72) is displaced, to only the axial direction Z. In other words, it is preferable that the inner circumferential surface of the hollow, enlarged diameter portion 73 of the tall nut surrounds the outer circumferential surface of the rod 6 with a small gap that allows the rod 6 located at the non-threaded portion N to be displaced in the axial direction Z, but not in the radial direction.

[0048] Similarly, it is preferable that the hollow enlarged diameter portion 58 of the lag screw bolt restricts (limits) the direction in which the rod 6 located at the non-threaded portion N of the lag screw bolt 5 (i.e., the expandable portion E located inside the hollow portion 55) is displaced, only in the axial direction Z. That is, it is preferable that the inner circumferential surface of the hollow enlarged diameter portion 58 of the lag screw bolt surrounds the outer circumferential surface of the rod 6 with a small gap that allows the rod 6 located at the non-threaded portion N to be displaced in the axial direction Z, but not in the radial direction. This prevents the rod 6 at the non-threaded portion N from moving radially and coming off the axis Q when a compressive force is applied to the wooden member connecting member 10 due to an earthquake, thus preventing buckling of the rod 6.

[0049] Figure 3 is a right-side cross-sectional view of the wooden member connecting member 10 of the first embodiment, comparing the state before and after being subjected to tensile force. Figure 3(A) shows the wooden member connecting member 10 before being subjected to tensile force, and Figure 3(B) shows the wooden member connecting member 10 at the point when the rod 6 is stretched by the maximum tensile force within the expected range. In this figure, S1 is the first threaded portion, S2 is the second threaded portion, E is the expandable portion, N is the non-threaded portion, T is the shrinkage allowance, MAX is the maximum assumed elongation length of the expandable portion, and L represents the axial length Z of the area in which the high nut 7 of the wooden member connecting member 10 is inserted into the pre-hole 4 before being subjected to tensile force (before use).

[0050] The expandable portion E of the rod 6 elongates in the axial direction Z when subjected to tensile force. In the following explanation, the length of the "elongation" of the expandable portion E of the rod 6 when subjected to the maximum kinetic energy within the assumed range (for example, the kinetic energy during a large earthquake) is referred to as the "maximum assumed elongation length MAX". In other words, the maximum assumed elongation length MAX is the "length of the expandable portion E of the rod 6 when subjected to the maximum kinetic energy within the assumed range E max "From "The length of the expandable portion E of the rod 6 before it is subjected to tensile force E pre This is the length after subtracting the "". The wooden member connecting member 10 of this embodiment is characterized in that, before being subjected to tensile force (before use), the axial length L of the range in which the tall nut 7 is inserted from the tip 7b of the tall nut into the pre-hole 4 is longer than the maximum assumed elongation length MAX of the expandable portion E. In other words, the wooden member connecting member 10 of this embodiment satisfies the following equation 1. L > MAX ... (Equation 1) "The length L in the axial direction Z of the range in which the tall nut 7 is inserted from the tip 7b of the tall nut into the pre-hole 4 before being subjected to tensile force" means "the length in the axial direction Z of the wooden member connecting member 10 from the tip 7b of the tall nut to the open end face 3a before being subjected to tensile force."

[0051] With this configuration, even when the rod 6 is extended to its maximum extent, the tall nut 7 of the wooden member connecting member 10 can continue to insert its tip 7b into the pre-hole 4. In other words, even when the rod 6 is fully extended, the tall nut 7 will not come out of the pre-hole 4. This means that the rear end 6b of the rod 6, which is screwed into the tall nut 7, will not move to a position off the axis Q of the pre-hole 4. As a result, during an earthquake, the rod 6 expands and contracts while the bolt 1, the hole 91a of the gusset plate 9, the tall nut 7, the rod 6, and the lag screw bolt 5 are all coaxial with the pre-hole 4. Therefore, since the ends 6a and 6b of the rod 6 do not experience axial misalignment, the wooden member connecting member 10 can suppress buckling of the rod 6.

[0052] Furthermore, it is preferable that the length L of the wooden member connecting member 10 in this embodiment satisfies the following equation 2. In equation 2, φ represents the outer diameter length of the tall nut 7. L > MAX + 0.1 × φ ... (Equation 2) In other words, when the rod 6 receives the maximum kinetic energy within the expected range, at least the tip 7b of the high nut 7 is inserted into the pre-hole 4.

[0053] Therefore, even when the rod 6 is fully extended, the high nut 7, with a length of 0.1 × φ, is inserted into the pre-hole 4 from the tip 7b of the high nut. As a result, the outer surface of the high nut 7 is supported by the inner surface 4d of the pre-hole 4, preventing the high nut 7 from wobbling relative to the pre-hole 4. As a result, by satisfying equation 2, the wooden member connecting member 10 of this embodiment can further prevent buckling of the rod 6 due to misalignment of the central axes of both ends 6a and 6b of the rod 6.

[0054] Furthermore, the direction of displacement of the tall nut 7 of the wooden member connecting member 10 in this embodiment is constrained to the axial direction Z by the inner surface 4d of the pre-drilled hole 4. In other words, the diameter of the pre-drilled hole 4 is set to a size that allows the tall nut 7 to move in the axial direction Z, but prevents it from moving in the radial direction around axis Q. That is, a gap of the necessary distance is provided between the tall nut 7 and the inner surface 4d of the pre-drilled hole 4 so that the tall nut 7 can move smoothly in the axial direction Z. For example, it is preferable that the diameter of the pre-drilled hole 4 be slightly larger (for example, 0.1 to 5.0 mm) than the outer diameter length φ of the tall nut 7. This configuration allows the rod 6 to extend to its maximum extent, further preventing the high nut 7, which is inserted into the pre-hole 4 only within a range of 0.1 × φ from the tip 7b of the high nut, from wobbling relative to the pre-hole 4.

[0055] Furthermore, the inner surface 4d of the pilot hole 4 surrounds the outer surface of the high nut 7 with a small gap between them. The outer surface of the high nut 7 is a cylindrical surface or multiple planes extending parallel to the axis Q, while the inner surface 4d of the pilot hole 4 is a cylindrical surface extending in the axial direction Z. Therefore, the inner surface 4d of the pre-drilled hole 4, which has a diameter slightly larger than the outer diameter length φ of the high nut 7, restricts the displacement direction of the high nut 7 to the axial direction Z. Furthermore, since neither the outer surface of the high nut 7 nor the inner surface 4d of the pre-drilled hole 4 has any radially protruding irregularities, the outer surface of the high nut 7 can slide smoothly against the inner surface 4d of the pre-drilled hole 4.

[0056] In other words, the pre-drilled hole 4 in this embodiment not only functions as a "hole" for embedding and fixing the wooden member connecting member 10 inside the wooden member 3, but also functions as a "guide rail" that guides the movement of the tall nut 7 only in the axial direction Z. Therefore, with this configuration, the wooden member connecting member 10 of this embodiment can prevent buckling of the rod 6 because the rod tip 6a of the rod 6 is fixed on the axis Q and the rod rear end 6b does not move to a position away from the axis Q.

[0057] The configuration of this wooden member connecting member 10, in which the inner surface 4d of the pre-drilled hole 4 constrains the displacement direction of the high nut 7 in the axial direction Z, is only possible because the means for fixing the tip 6a of the rod material 6 inside the pre-drilled hole 4 is a lag screw bolt 5. For example, GIUA (Glue in unbonded anchor) has been conventionally known as a connecting structure for joining reinforced concrete structures and wooden members 3.

[0058] GIUA is a connecting structure in which epoxy resin (adhesive) is filled into the pre-hole 4 to bond the tip of the steel rod to the wooden member 3, while simultaneously forming an unbonded section on the rear end of the steel rod. The unbonded section is the part of the steel rod that is not fixed to the wooden member 3 by the epoxy resin. In GIUA, the unbonded section is formed by wrapping tape around the steel rod to prevent the epoxy resin from directly touching the steel rod. When fixing the steel rod to the pre-hole 4, the procedure involves inserting the tape-wrapped steel rod into the pre-hole 4, and then injecting the epoxy resin through the gap between the inner surface 4d of the pre-hole 4 and the tape. Therefore, in the case of a connecting member of the type in which a steel rod is connected to a wooden member 3 with epoxy resin, a gap of sufficient size is required between the tape-wrapped steel rod and the inner surface 4d of the pre-hole 4 to inject the viscous epoxy resin down to the bottom 4a of the pre-hole 4. In other words, if the gap between the inner surface 4d of the pre-hole 4 and the tall nut 7 is very small, the epoxy resin cannot be injected to the bottom 4a of the pre-hole 4, and the GIUA cannot be formed.

[0059] Furthermore, near the opening 4b of the pre-hole 4, the epoxy resin hardens between the tape and the inner surface 4d of the pre-hole 4, conforming to the shape of the tape. This creates irregularities in the epoxy resin near the opening 4b of the pre-hole 4. These irregularities then cause the high nut 7 to catch when sliding in the axial direction Z. Therefore, in construction methods such as GIUA, where steel rods are connected to wooden members 3 with epoxy resin, the inner surface 4d of the pre-drilled hole 4 could not be used as a "guide rail" for sliding the tall nut 7 in the axial direction Z.

[0060] In other words, in this embodiment, the wooden member connecting member 10 does not require a gap for injecting epoxy resin because the metal rod tip 6a is fixed with a lag screw bolt 5, so the inner surface 4d of the pilot hole 4 can be positioned as close as possible to the outer surface of the high nut 7. Therefore, the wooden member connecting member 10 of the present invention can use the inner surface 4d of the pre-drilled hole 4 as a guide rail that guides the direction in which the tall nut 7 is displaced in the axial direction Z.

[0061] Furthermore, in this embodiment, the wooden member connecting member 10 is composed entirely of metal parts 1, 9, 7, 6, 5, and 11, so the parts 1, 9, 7, 6, 5, and 11 can be reused as metal materials. Therefore, the wooden member connecting member 10 can provide a building with a low environmental impact.

[0062] Figure 4 is a right-side cross-sectional view of the wooden member connecting member 10 of the first embodiment, comparing the state before (before use) and after being subjected to compressive force. Figure 4(A) shows the wooden member connecting member 10 before being subjected to compressive force, and Figure 4(B) shows the wooden member connecting member 10 after being subjected to compressive force.

[0063] In the first embodiment, the lag screw bolt 5 has its screw rear end 54 positioned close to the high nut 7. That is, the screw rear end 54 of the lag screw bolt 5 and the high nut tip 7b of the high nut 7 are not in contact, nor are they far apart, but are positioned close to each other. In other words, there is a gap in the axial direction Z between the lag screw bolt 5 and the high nut 7. In the following description, the range between the screw rear end 54 of the lag screw bolt 5 and the high nut tip 7b of the high nut 7 will be referred to as the "shrinkage allowance T". At the shrinkage allowance T, the rod 6 is exposed in the interior 4c of the pilot hole 4. At both ends of the shrinkage allowance T in the axial direction Z, the radial movement of the rod 6 is restricted by the opening at the tip of the hollow enlarged diameter portion 73 of the high nut and the opening at the rear of the hollow enlarged diameter portion 58 of the lag screw bolt.

[0064] Furthermore, the lag screw bolt 5 is fixed coaxially with the pilot hole 4, and the tall nut 7 is inserted into the pilot hole 4 to a length longer than the maximum assumed extension length of the expandable portion E, and the direction of displacement of the tall nut 7 is constrained to the axial Z by the inner surface 4d of the pilot hole 4. In other words, the inner surface 4d of the pilot hole 4 guides the outer surface of the tall nut 7 only in the axial Z direction. Therefore, even if tensile and compressive forces are applied to the wooden member connecting member 10 due to an earthquake or the like, the positions of both ends 6a and 6b of the rod 6 are always maintained on axis Q.

[0065] In this state, the wooden member connecting member 10 of this embodiment has a shrinkage allowance T, so when a compressive force is applied, the expansion and contraction portion E of the rod 6 shrinks in the axial direction Z, thereby absorbing the compressive force. As the expandable portion E contracts in the axial direction Z, the lag screw bolt 5 and the tall nut 7 move closer together. In other words, when the expandable portion E of the rod 6 contracts, the lag screw bolt 5 and the tall nut 7 do not collide, so the compression of the rod 6 is not hindered by the lag screw bolt 5 and the tall nut 7. Therefore, the wooden member connecting member 10 of this embodiment can absorb large compressive forces because it has a contraction allowance T.

[0066] Furthermore, since the expandable portion E includes not only the shrinkage allowance T but also the non-threaded portion N, even if the shrinkage allowance T is made small to reduce the range in which radial displacement is not restricted and prevent buckling, the expandable portion E can still be made larger than the shrinkage allowance T. Therefore, while reducing the possibility of buckling, it is possible to absorb more kinetic energy than in the case where there is no non-threaded portion N (i.e., when only the axial portion of the rod 6 in the shrinkage allowance T expands and contracts).

[0067] Furthermore, in the first embodiment, the open end face 3a of the wooden member 3 is the rearmost end face 3b of the wooden member 3 that is closest to the opposing surface 91b of the gusset plate 9 and extends parallel to the opposing surface 91b, and is located at a distance from the opposing surface 91b. The rearmost end face 3b refers to the end face of the wooden member 3 located at the rearmost end. In the wooden member connecting member 10 of the first embodiment, the last end face 3b of the wooden member 3 itself is provided with an opening 4b of the pre-hole 4, and a gap is provided between the last end face 3b and the gusset plate 9. The gap between the last end face 3b and the gusset plate 9 is set to be larger in the axial direction Z than the shrinkage allowance T. Alternatively, the size of the gap between the last end face 3b and the gusset plate 9 may be set to be larger than the length in the axial direction Z over which the expansion and contraction portion E of the rod 6 subjected to compressive force shrinks to its maximum extent.

[0068] With this configuration, the wooden member connecting member 10 of the first embodiment absorbs compressive force solely through the expansion and contraction of the rod 6, and even when the rod 6 is compressed to its maximum extent, the wooden member 3 does not come into contact with the gusset plate 9. Therefore, even in the event of a major earthquake, the wooden member 3 will not be destroyed, and the compressive force will be absorbed solely by the rod member 6. For example, if the wooden member connecting member 10 is used in the wooden seismic-resistant member 100, the wooden panel 32 will not break until the very end, and the wooden seismic-resistant member 100 will continue to absorb the compressive force.

[0069] Furthermore, in this embodiment, the wooden member connecting member 10 has a gap between the last end face 3b and the gusset plate 9, allowing a tool such as a wrench G2 to be inserted into the gap and the high nut 7 to be tightened. Therefore, the wooden member connecting member 10 of this embodiment can achieve good workability because there is a gap between the last end face 3b and the gusset plate 9.

[0070] Furthermore, in this embodiment, the wooden member connecting member 10, as described above, has a configuration in which the tall nut 7 does not come out of the pre-drilled hole 4, and the tall nut 7 is screwed onto both the shaft portion 1a of the bolt 1 and the rod 6. In other words, the shaft portion 1a of the bolt 1 or the rod 6 and the tall nut 7 form a double structure which is exposed in the gap between the opposing surface 91b of the gusset plate 9 and the rearmost end surface 3b of the wooden member 3. The wooden member connecting member 10 of the present invention can obtain great strength because the portion exposed from the pre-drilled hole 4 is a double metal structure, thereby preventing buckling of the portion between the gusset plate 9 and the rearmost end surface 3b.

[0071] Next, the non-threaded portion N will be described in detail. The non-threaded portion N is the range that allows displacement of the expansion / contraction portion E of the rod 6 in the axial direction Z of the pre-drilled hole 4 relative to either the tall nut 7 or the lag screw bolt 5, or both. In the first to third embodiments, the non-threaded portion N is formed by the shape of the hollow portions 71 and 55 of the tall nut 7 or the lag screw bolt 5.

[0072] Figure 5 is an explanatory diagram of the non-threaded portion N in the first to third embodiments. Figure 5(A) is a front cross-sectional view of the high nut 7 and lag screw bolt 5 that form the non-threaded portion N in the first embodiment. Figure 5(B) is a front view of the rod material 6 that can form the non-threaded portion N in the first to third embodiments. In this figure, 60A is a rod 6 that has male threads 61 and 62 only at both ends 6a and 6b, and does not have male threads on the shaft portion 63 between the male threads 61 and 62. 60B is a rod 6 that is fully threaded, with male threads provided on the entire outer surface. 60C is a rod 6 in which the shaft portion 63 is thinner than the minimum diameter (root diameter) of the male threads 61 and 62 provided at both ends 6a and 6b.

[0073] (First embodiment of non-threaded portion N) In the first embodiment, the non-threaded portion N is formed on both the tip portion 7b (other end portion 7b) of the tall nut 7 and the screw rear end portion 54 of the lag screw bolt 5. Figures 2 to 4 above illustrate this non-threaded portion N of the first embodiment. As shown in Figure 5(B), at least three types of rod materials 60A, 60B, and 60C can be used to form the non-threaded portion N of the first embodiment, specifically the high nut 7 and the lag screw bolt 5.

[0074] The rod 60A has male threads 61 and 62 only at both ends 6a and 6b, and the shaft portion 63 extending in the axial direction Z between the male threads 61 and 62 does not have male threads. Preferably, the maximum diameter (outer diameter) of the male threads 61 and 62 of the rod material 60A and the diameter of the shaft portion 63 are the same. The shaft portion 63 can be made as thick as possible when the maximum diameter (outer diameter) of the male threads 61 and 62 and the diameter of the shaft portion 63 are the same. However, the diameter of the shaft portion 63 may be greater than or equal to the minimum diameter (root diameter) of the male threads 61 and 62, and less than the maximum diameter (outer diameter) of the male threads 61 and 62. Furthermore, the diameter of the shaft portion 63 may be greater than the maximum diameter (outer diameter) of the male threads 61 and 62, as long as a small gap is created between the hollow enlarged diameter portion 73 of the high nut and the hollow enlarged diameter portion 58 of the lag screw bolt.

[0075] The pitch of the male thread 62 on the rear end 6b of the rod is the same as the pitch of the male thread on the shaft portion 1a of the bolt 1. Furthermore, if the male thread 61 at the tip 6a of the rod is screwed into the lag screw bolt 5 and the rear end 6b of the rod is screwed into the tall nut 7, the pitch of the male thread 61 at the tip 6a of the rod and the pitch of the male thread 62 at the rear end 6b of the rod may be different.

[0076] The rod 60B is a fully threaded rod 6 with male threads provided along its entire outer surface. In the rod 60B, the male thread 61 located at the tip 6a of the rod forms the first threaded portion S1, and the male thread 62 located at the rear end 6b of the rod forms the second threaded portion S2. It is preferable that the maximum diameter (outer diameter) of the male thread located at the telescopic section E of the rod 60B is the same as the maximum diameter of the male threads 61 and 62 at both ends 6a and 6b. Furthermore, if the male thread 61 at the tip end 6a of the rod is screwed into the lag screw bolt 5 and the rear end 6b of the rod is screwed into the high nut 7, the pitches of the male threads 61 and 62 at the tip end 6a and the rear end 6b of the rod may be different.

[0077] The rod material 60C that forms the non-threaded portion N in the first embodiment is a rod material 6 in which the diameter of the shaft portion 63 is smaller than the minimum diameter (root diameter) of at least one of the male threads 61 at the tip portion 6a of the rod or the male threads 62 at the rear end portion 6b of the rod. In the first embodiment, the diameter of the shaft portion 63 of the rod material 60C that forms the non-threaded portion N is set to be slightly smaller than the inner diameter of both the hollow enlarged diameter portion 73 of the high nut and the hollow enlarged diameter portion 58 of the lag screw bolt. This allows the hollow enlarged diameter portions 73 and 58 to restrain the displacement direction of the expansion and contraction portion E of the rod material 6 in the axial direction Z.

[0078] The tall nut 7 forming the non-threaded portion N in the first embodiment has a hollow portion 71 comprising a nut female thread portion 72 and a tall nut hollow enlarged diameter portion 73. The non-threaded portion N on the tall nut side is formed by the tall nut hollow enlarged diameter portion 73. The tall nut hollow enlarged diameter portion 73 extends axially Z toward the rear end from the other end 7b of the tall nut 7 to the nut female thread portion 72. The minimum inner diameter of the hollow enlarged diameter portion 73 of the tall nut is set to be larger than the maximum inner diameter (root diameter) of the female thread portion 72 of the tall nut 7.

[0079] Alternatively, the minimum inner diameter of the hollow enlarged diameter portion 73 of the high nut is set to be larger than the maximum diameter of the rod material 6. For example, suppose a rod 60A has a cylindrical surface extending in the axial direction Z on the outer circumferential surface of the shaft portion 63, and male threads 61 and 62 only at both ends 6a and 6b, and a high nut 7 is screwed into it. In this case, the minimum inner diameter of the hollow enlarged diameter portion 73 of the high nut may be set to be larger than the maximum diameter of the rod 6 at the second screw portion S2 (i.e., the outer diameter of the male thread 62 at the rear end 6b of the rod). When the high nut 7 and the rod 6 are screwed together, it is preferable that the gap between the inner circumferential surface of the hollow enlarged diameter portion 73 of the high nut and the expandable portion E of the rod 6 is of a size necessary to allow the expandable portion E to displace smoothly in the axial direction Z relative to the inner circumferential surface of the hollow enlarged diameter portion 73 of the high nut. Furthermore, when screwing in a fully threaded rod 60B, the minimum inner diameter of the hollow enlarged diameter portion 73 of the high nut is set to be larger than the outer diameter of the male thread located at the non-threaded portion N on the high nut side.

[0080] The lag screw bolt 5 forming the non-threaded portion N in the first embodiment comprises a screw female thread portion 57 located at the tip of the hollow portion 55, and a lag screw bolt hollow enlarged diameter portion 58 extending in the axial direction Z between the screw female thread portion 57 and the screw rear end portion 54. The non-threaded portion N on the lag screw bolt side is formed by the lag screw bolt hollow enlarged diameter portion 58. The minimum inner diameter of the hollow enlarged diameter section 58 of the lag screw bolt is set to be larger than the maximum inner diameter (root diameter) of the female thread section 57 of the screw.

[0081] Alternatively, the minimum inner diameter of the hollow enlarged diameter portion 58 of the lag screw bolt is set to be larger than the maximum diameter of the bar material 6. For example, suppose a rod 60A having a cylindrical surface on its outer circumference and a shaft portion 63 without threads is screwed into a female screw portion 57. In this case, the minimum inner diameter of the hollow enlarged diameter portion 58 of the lag screw bolt may be set to be larger than the maximum diameter of the rod 6 at the first screw portion S1 (i.e., the outer diameter of the male thread 61 at the rod tip portion 6a). When the lag screw bolt 5 and the rod 6 are screwed together, it is preferable that the gap between the inner surface of the hollow enlarged diameter portion 58 of the lag screw bolt and the expandable portion E of the rod 6 is large enough to allow the expandable portion E to displace smoothly in the axial direction Z relative to the inner surface of the hollow enlarged diameter portion 58 of the lag screw bolt. Furthermore, when screwing in a fully threaded rod 60B, the minimum inner diameter of the hollow enlarged diameter portion 58 of the lag screw bolt is set to be larger than the outer diameter of the male thread located at the non-threaded portion N on the lag screw bolt side.

[0082] With this configuration, in the non-threaded portion N, the inner circumferential surfaces of the hollow enlarged diameter portions 73 and 58 do not come into contact with the outer circumferential surface of the rod 6. Therefore, the non-threaded portion N can be easily formed at a specific position simply by screwing the high nut 7, the rod 6, and the lag screw bolt 5 together.

[0083] (Second embodiment of non-screwed portion N) Figure 5(C) is a front cross-sectional view of the high nut 7 and lag screw bolt 5 forming the non-threaded portion N in the second embodiment. The non-threaded portion N of the second embodiment is characterized by being formed only on the tall nut side. In other words, the non-threaded portion N of the second embodiment is formed by screwing a tall nut 7 having a tall nut hollow enlarged diameter portion 73 and a lag screw bolt 5 without a lag screw bolt hollow enlarged diameter portion 58 onto a rod 6.

[0084] The hollow portion 55 of the lag screw bolt 5 is provided with a female screw thread portion 57 extending from the tip to the rear end. The rod material 6 is the same as the rod materials 60A, 60B, and 60C that form the non-threaded portion N in the first embodiment. Furthermore, the other configurations, usage methods, manufacturing methods, installation methods, and effects of the high nut 7 and lag screw bolt 5 forming the second embodiment of the non-threaded portion N are the same as those of the high nut 7 and lag screw bolt 5 forming the first embodiment of the non-threaded portion N.

[0085] (Third embodiment of the non-screwed portion N) Figure 5(D) is a front cross-sectional view of the high nut 7 and lag screw bolt 5 forming the non-threaded portion N in the third embodiment. The non-threaded portion N of the third embodiment is characterized by being formed only on the lag screw bolt side. In other words, the non-threaded portion N of the third embodiment is formed by screwing a tall nut 7 without a tall nut hollow enlarged diameter portion 73 and a lag screw bolt 5 having a lag screw bolt hollow enlarged diameter portion 58 onto a rod 6.

[0086] The tall nut 7 has a nut female thread portion 72 that extends throughout the entire hollow portion 71. The rod material 6 is the same as the rod materials 60A, 60B, and 60C that form the non-threaded portion N in the first embodiment. Furthermore, the other configurations, usage methods, manufacturing methods, installation methods, and effects of the high nut 7 and lag screw bolt 5 forming the third embodiment of the non-threaded portion N are the same as those of the high nut 7 and lag screw bolt 5 forming the first embodiment of the non-threaded portion N.

[0087] (Fourth to sixth examples of non-screwed portion N) The non-threaded portion N may be located between the second threaded portion S2 and the tip portion 7b of the high nut 7 within the hollow portion 71 of the high nut 7, or between the rear end portion 54 of the screw and the first threaded portion S1 within the hollow portion 55 of the lag screw bolt 5. Alternatively, the non-threaded portion N may be located in both locations. In this non-threaded portion N, the maximum diameter of the expandable portion E of the rod 6 is set to be smaller than the minimum diameter of the rod 6 in the threaded portions S1 and S2 closest to the non-threaded portion N. This will be explained in detail below.

[0088] Figure 6 is an explanatory diagram of the non-threaded portion N in the fourth to sixth embodiments. Figure 6(E) is a front view of the rod 60C that forms the non-threaded portion N in the fourth to sixth embodiments. The rod 60C is a rod 6 in which the shaft portion 63 is thinner than the minimum diameter (root diameter) of the male threads 61 and 62 provided at both ends 6a and 6b. Figure 6(F) is a front cross-sectional view of the high nut 7 and lag screw bolt 5 that form the non-threaded portion N of the fourth embodiment, and Figure 6(G) shows the rod 6 of Figure 6(E) and the high nut 7 and lag screw bolt 5 of Figure 6(F) when they are screwed together. Figure 6(H) is a front cross-sectional view of the high nut 7 and lag screw bolt 5 of the fifth embodiment, and Figure 6(I) is a front cross-sectional view of the high nut 7 and lag screw bolt 5 of the sixth embodiment. In Figures 6(H) and 6(I), the position of the rod 60C is indicated by a dashed line.

[0089] In the fourth to sixth embodiments, the tall nut 7 forming the non-threaded portion N has a nut female thread portion 72 formed throughout the entire hollow portion 71. In the fourth to sixth embodiments, the lag screw bolt 5 forming the non-threaded portion N also has a screw female thread portion 57 formed throughout the entire hollow portion 55. In the fourth to sixth embodiments, the non-threaded portion N is formed by the fact that the shaft portion 63 of the rod material 6 is thinner than the minimum diameter of the male threads 61 and 62 (the diameter of the shaft portion 63 is smaller than the root diameter of the male threads 61 and 62).

[0090] In the fourth embodiment, the non-threaded portion N is formed on both the tall nut 7 and the lag screw bolt 5. That is, the male thread 62 on the rear end side of the rod 6 is screwed into the female thread portion 72 of the nut at a position spaced apart from the tip portion 7b of the tall nut toward the rear end, and the male thread 61 on the tip side is screwed into the female thread portion 57 of the screw at a position spaced apart from the rear end portion 54 of the screw toward the tip. The other configurations and effects of the high nut 7 and lag screw bolt 5 forming the fourth embodiment of the non-threaded portion N are the same as those of the high nut 7 and lag screw bolt 5 forming the first embodiment of the non-threaded portion N.

[0091] In the fifth embodiment, the non-threaded portion N is formed only on the tall nut 7, as shown in Figure 6(H). In the sixth embodiment, the non-threaded portion N is formed only on the lag screw bolt 5, as shown in Figure 6(I). The other configurations and effects of the high nut 7 and lag screw bolt 5 forming the fifth and sixth embodiments of the non-threaded portion N are the same as those of the high nut 7 and lag screw bolt 5 forming the fourth embodiment of the non-threaded portion N, respectively.

[0092] Next, the method for connecting the wooden member connecting member 10 of this embodiment will be described. Figure 7 is an explanatory diagram of the method for connecting the wooden member connecting member 10 in the first embodiment. In Figure 7, the process progresses from (A) to (E).

[0093] First, as shown in Figure 7(A), a pilot hole 4 is made in the open end face 3a of the wooden member 3. The inner diameter of the pilot hole 4 is the same as the root diameter of the wood male thread 52 of the lag screw bolt 5, or a dimension between the maximum diameter (outer diameter) and the root diameter of the wood male thread 52 of the lag screw bolt 5, and is set to be slightly larger than the outer diameter length φ of the tall nut 7.

[0094] Next, as shown in Figure 7(B), the lag screw bolt 5 is screwed into the pilot hole 4 from the screw tip 56 with the rear end 54 facing the rear end. This fixes the lag screw bolt 5 coaxially with the pilot hole 4. The lag screw bolt 5 is fixed deep inside the pilot hole 4 (near the bottom 4a). Next, as shown in Figure 7(C), the rod 6 is inserted into the pre-hole 4 from the end (rod tip 6a) that has a male thread 62 that can be screwed onto the lag screw bolt 5, and then placed into the hollow part 55 of the lag screw bolt 5, and the male thread 62 is screwed into the screw female thread part 57. Once this first screwing part S1 is completed, the rod 6 can be fixed coaxially with the pre-hole 4.

[0095] Next, as shown in Figure 7(D), the rear end 6b of the rod material 6 is inserted into the hollow portion 71 of the tall nut 7 from the tip portion 7b of the tall nut, and the female thread portion 72 of the nut is screwed onto the male thread 62. In this case, since the installation of the tall nut 7, the rod 6, and the lag screw bolt 5 is performed inside the pre-drilled hole 4, the position of the tall nut 7 relative to the rod 6 and the position of the rod 6 relative to the lag screw bolt 5 cannot be visually confirmed from the outside of the wooden member 3. In this case, in the wooden member connecting member 10 in which the non-threaded portion N is formed as described above in the first to third embodiments, the position and length of the non-threaded portion N and the shrinkage allowance T can be aligned by using the rod 60A.

[0096] In other words, the shaft portion 63 of the rod 60A that forms the non-threaded portion N in the first to third embodiments cannot enter the nut female thread portion 72 or the screw female thread portion 57. Therefore, when the shaft portion 63 reaches the boundary between the hollow enlarged diameter portion 73, 58 and the female thread portion 72, 57, it becomes impossible to rotate the rod 60A or the tall nut 7 any further. This means that by assembling the same parts, it is always possible to form a non-threaded portion N and a shrinkage allowance T of the same length in the same position. Therefore, in a wooden seismic-resistant member 100 that includes multiple wooden member connecting members 10, the position, length, and strength of the non-threaded portion N and the shrinkage allowance T of the wooden member connecting members 10 connected to the wooden panel 32 can be aligned.

[0097] Furthermore, it is preferable to rotate the tall nut 7 until the rear end 7a of the tall nut is closer to the front end than the finished height H of the tall nut 7 in the completed wooden member connecting member 10. This is effective when the gusset plate 9 is fixed to the member to be joined 2 before the wooden member 3. As a result, the portion of the high nut 7 that protrudes from the wooden member 3 is shorter than when it is completed. Therefore, by moving the wooden member 3 (for example, the wooden panel 32) in the state shown in Figure 7(D) parallel to the opposing surface 91b of the gusset plate 9, it becomes easier to install the wooden member 3.

[0098] For example, if the non-threaded portion N of the wooden member connecting member 10 is one of the first to third embodiments, the position of the tall nut 7 when it can no longer be turned may be configured to be closer to the tip than the finished height H. As a result, by rotating the tall nut 7 by the same amount in the direction of tightening the tall nut 7 onto the bolt 1 in Figure 7(E), it is possible to always form a non-threaded portion N and a shrinkage allowance T of the same length at the same position, even if the gusset plate 9 is fixed to the joined member 2 before the wooden member 3.

[0099] On the other hand, in the case of the wooden member connecting member 10 that forms the non-threaded portion N in the fourth to sixth embodiments, by changing the way the parts 5, 6, and 7 are installed, the amount of compressive and tensile force absorbed and the durability performance of the wooden member connecting member 10 can be adjusted even if the same parts 5, 6, and 7 are used. In other words, by changing the depth of the pilot hole 4, the installation depth of the lag screw bolt 5, and the position in which the high nut 7 is screwed onto the rod 6, the presence and length of the shrinkage allowance T, the position and length of the non-threaded portion N, and whether or not the rear end 7a of the high nut protrudes from the pilot hole 4 can be changed.

[0100] Next, move the wooden member 3 (for example, the wooden panel 32) in the state shown in Figure 7(D) to align the holes 91a in the gusset plate 9, the washer 11, and the hole in the tall nut 7 as shown in Figure 7(E), and then fix it with the bolt 1. At this time, it is preferable to rotate the tall nut 7 in the opposite direction to that shown in Figure 7(D) (in the direction in which the tall nut 7 is tightened onto the bolt 1) after the shaft portion 1a of the bolt 1, which has passed through the hole 91a of the gusset plate 9, has been screwed into the tall nut 7. This ensures that the head 1b of the bolt 1, the tall nut 7, and the washer 11 sandwich the gusset plate 9 (in this figure, the flange portion 91 on the wood member side) without any gaps, thus preventing buckling of the rod 6 caused by looseness at the connection between the bolt 1 and the tall nut 7 and the gusset plate 9.

[0101] Next, we will describe the wooden seismic-resistant member 100 of the first embodiment, which uses the wooden member connecting member 10 of the first embodiment. Figure 8 is a front view of the wooden seismic-resistant member 100 of the first embodiment as seen from the interior. In this figure, 10 is a wooden member connecting member, 20 is a column-beam frame, 21 is a column, 22 is a beam, 9 is a gusset plate, 31 is a wooden thick plate facing material, 32A, 32B, and 32C are wooden panels of different widths, and 100 is a wooden seismic-resistant member. When referring to the wooden panels 32A, 32B, and 32C collectively, they are written as wooden panel 32. Figure 8 illustrates a wooden seismic-resistant member 100 used as a load-bearing wall in an apartment building. The wooden seismic-resistant member 100 may also be a partition wall separating adjacent units or a partition wall within a dwelling unit.

[0102] The column-beam frame 20 consists of columns 21 and beams 22 made of reinforced concrete (RC) or steel-reinforced concrete (SRC) that constitute the framework of the apartment building. This column-beam frame 20 corresponds to the joined member 2 in the wooden member connecting member 10 of this embodiment.

[0103] The wooden seismic-resistant member 100 of this embodiment is characterized by a configuration in which the wooden thick-panel material 31 is surrounded on all four sides by columns 21 and beams 22 made of reinforced concrete (RC) or steel-reinforced concrete (SRC). By surrounding the wooden thick-panel material 31 on all four sides with a column and beam frame 20 made of RC or SRC, which has high fire resistance, even if the wooden thick-panel material 31 is destroyed in a fire, the columns 21 and beams 22 can maintain the structure of the building and prevent collapse. As a result, the wooden seismic-resistant member 100 has sufficient fire resistance as a main structural component even if the wooden thick-panel material 31 is not covered with fire-resistant material 41, so the wooden thick-panel material 31 can be used in an exposed state.

[0104] The wood-based thick panel surface material 31 is composed of multiple wood panels 32 made of CLT or LVL. Each of these wood panels 32 corresponds to a wood member 3 in the wood member connecting member 10 of this embodiment. Multiple wood panels 32 are arranged flush horizontally in a front view from the interior side to form a single wood-based thick panel surface 31. In this figure, five or six wood panels 32 are arranged side by side adjacent to each other. For example, if the wood-based thick panel surface 31 is CLT and the orientation of the exposed panels on the interior side surface is vertical as shown in the figure, the boundaries between adjacent wood panels 32 blend in with the boundaries of the sawn panels within the CLT. As a result, the wood-based thick panel surface 31 appears to be made up of a single large sheet of CLT. However, the composition of the wood-based thick panel surface 31 is not limited to this, and it may also be made up of a single wood panel 32.

[0105] Each wooden panel 32 is designed to be light enough to be installed by hand (for example, 150 kg or less) and is sized (for example, 1,200 mm wide, 2,400 mm high, and 100 mm thick). The width of the wooden panels 32 does not have to be uniform. For example, in this diagram, three different widths of wooden panels 32 are used. The wide wooden panel 32A in the center of the lower floor is 1,575 mm wide, while the narrower wooden panel 32B located directly above it on the upper floor is 787.5 mm wide. The width of the wide wooden panel 32A is exactly twice that of the narrower wooden panel 32B. The width of the other wooden panels 32 is uniform, at 1,000 mm.

[0106] Each wooden panel 32 is provided with diagonally cut notches 36 at its four corners when viewed from the front. The virtual centerline A of the upper and lower beams 22 of the wooden panel 32 and the virtual vertical line B extending along both sides 35 of the wooden panel 32 intersect at four points, forming a virtual rectangle. Hereafter, the diagonal of this virtual rectangle will be referred to as the virtual diagonal D for explanatory purposes. The wooden member connecting members 10 are provided at the four corners of the wooden panel 32 so that the rods 6 and lag screw bolts 5 extend along or parallel to this virtual diagonal D. As a result, the rods 6 of the wooden member connecting members 10 are provided so that they extend diagonally from the notches 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 virtual diagonal D.

[0107] Therefore, as shown in the diagram with the wide wood panel 32A and the narrow wood panel 32B, if the width of the wood panel 32 changes, the angle of the virtual diagonal D also changes, and the angle at which the pre-drilled holes 4 are made will differ depending on the width of the wood panel 32. Figure 8 also illustrates a case where the virtual vertical line B aligns between the upper and lower floors, as shown by the two wooden panels 32B on the upper floor and the wooden panel 32A on the lower floor. However, this is not the only example; the virtual vertical line B does not have to align between the upper and lower floors.

[0108] Figure 9 is an enlarged cross-sectional view of portion M in Figure 8 of the wooden seismic-resistant member 100 of the first embodiment, using the wooden member connecting member 10 of the first embodiment. In this figure, the wooden panel 32 is cut vertically along a plane parallel to the front so that the inside of the pre-drilled hole 4 is visible. In Figure 9, 10 is a wooden member connecting member, 21 is a column, 22 is a beam, 9 is a gusset plate, 93 is a web section, 94 is a rib section, 91 is a wooden member side flange section, 91a is a hole, 32 is a wooden panel, and 100 is a wooden seismic-resistant member.

[0109] As shown in Figure 9, notches 36 are provided at the four corners of the wooden panel 32. These notches 36 are cut out by a slope 33 whose extension intersects at least with the top surface 34 or the bottom surface and the side surface 35. The open end surface 3a of the wooden panel 32 illustrated in Figure 9 is this slope 33. Multiple wooden member connecting members 10 can be provided side by side in one notch 36. This allows the component forces F2 and F3, which will be described later, to be distributed among the multiple wooden member connecting members 10. It is preferable that the slope 33 is a plane perpendicular to the virtual diagonal D of each wood panel 32. By having the slope 33 be a plane perpendicular to the virtual diagonal D of each wood panel 32, the component forces F2 and F3 acting on the wood member connecting member 10 can be distributed evenly.

[0110] The wooden panel 32 is fixed between the column-beam frame 20 and the surrounding areas (top surface 34 and side surface 35 in Figure 9) separated by a gap 43. This gap 43 is set at a distance that prevents the wooden panel 32 from interfering with the column-beam frame 20 during an earthquake.

[0111] Pre-drilled holes 4 opening into notches 36 are provided at the four corners of the wood panel 32. The axis Q of the pre-drilled holes 4 extends from the notches 36 along or parallel to the virtual diagonal D. In the example of Figure 9, three wood member connecting members 10 are embedded in the four corners of the wood panel 32 parallel to the virtual diagonal D. In other words, the entire axis Q of the pre-drilled holes 4 of the wood member connecting members 10 provided at the four corners of the wood panel 32 is contained within a virtual plane V parallel to the virtual diagonal D. If any part of the wood member connecting member 10 deviates from this virtual plane V, the wood member connecting member 10 becomes more susceptible to buckling. Note that one wood member connecting member 10 may be provided in each notch 36, or multiple members may be provided.

[0112] A gusset plate 9 is fixed to the inside of the column-beam frame 20, which is made of reinforced concrete (RC) or steel-reinforced concrete (SRC). The gusset plate 9 is a steel fitting and has a web portion 93, a flange portion 92 on the side of the joined member, a flange portion 91 on the side of the wooden member, and a rib portion 94. The web portion 93 is a member that extends in a plate-like shape to match the shape of the notch 36 between the flange portion 92 on the joined member side that extends along the side surface of the column-beam frame 20 and the flange portion 91 on the wood member side that extends parallel to the open end face 3a of the wood panel 32. The flange portion 92 on the joined member side of the gusset plate 9 located at the corner formed by the column 21 and the beam 22 is at a right angle and is fixed along the beam 22 with multiple headed studs 44 when attached to the column-beam frame 20. The flange portion 92 on the joined member side of the gusset plate 9 fixed in a location not in contact with the column 21 has a straight shape and is fixed along the upper or lower beam 22 with multiple headed studs 44 as shown in Figure 9.

[0113] Furthermore, the wood member side flange portion 91 is located at the end of the web portion 93 and is positioned facing the open end face 3a of the wood panel 32. The wood member side flange portion 91 extends perpendicular to the virtual diagonal line D and has a hole 91a into which the shaft portion 1a of the bolt 1 of the wood member connecting member 10 can be inserted.

[0114] The rib portion 94 extends in a columnar or plate-like shape from the wood member side flange portion 91 to the joined member side flange portion 92. In this embodiment, the rib portion 94 extends straight from the wood member side flange portion 91 to the joined member side flange portion 92, either parallel to the virtual diagonal D or perpendicular to the wood member side flange portion 91, as shown in Figure 9. Preferably, the thickness of the rib portion 94 in the front-to-back direction in this figure is the same as that of the wood member side flange portion 91. This structure of the rib portion 94 allows for strong support of the wood member side flange portion 91. Note that the shape of the gusset plate 9 is not limited to that shown in Figure 9. For example, as shown in Figure 8, the gusset plate 9 located between two wooden panels 32 has two wooden flange portions 91 on each side, with a shape and angle that follows the open end faces 3a of the two opposing wooden panels 32.

[0115] As explained in Figure 7, the wooden seismic-resistant member 100 is installed on the column-beam frame 20 by moving the wooden panel 32 in the state shown in Figure 7(D) between the upper, lower, left, and right gusset plates 9, aligning the holes 91a in the gusset plates 9 with the holes in the tall nuts 7, and fixing them with bolts 1. This connects the wooden panel 32 to the gusset plate 9.

[0116] Figure 10 is an explanatory diagram of the resistance mechanism of the wooden seismic-resistant member 100 of the first embodiment. In this figure, the distortion of the column-beam frame 20 is exaggerated to make the explanation easier to understand. The white arrows in this figure represent the horizontal force F1 acting on the column-beam frame 20 due to an earthquake, etc., and the rotational force generated by the horizontal force F1. The resistance forces R1 and R2 generated in the wooden seismic-resistant member 100 against these forces are represented by the black arrows. In this figure, D represents a virtual diagonal, and C represents the center of the wooden panel 32, which is the intersection of the virtual diagonals D. The resistance mechanism of the wooden seismic-resistant member 100 will be explained in detail below, using the wooden panel 32 on the far left of the diagram as an example.

[0117] When an earthquake occurs in an apartment building, the upper and lower beams 22 of the column-beam frame 20 are subjected to opposite horizontal forces F1. For example, as shown in the figure, the upper beam 22 is subjected to a horizontal force F1 moving from left to right, and the lower beam 22 is subjected to a horizontal force F1 moving from right to left (white straight arrows). The wooden member connecting member 10 consists of bolts 1, high nuts 7, rods 6, and lag screw bolts 5 that are screwed in series and extend parallel to the virtual diagonal D, with the bolts 1 and high nuts 7 connected to the gusset plate 9. As a result, the force applied to the beam 22 is transmitted from the gusset plate 9 to the rods 6. At that time, a portion of the horizontal force F1 applied to the beam 22 is decomposed into components parallel to the virtual diagonal D (F2, F3) and components perpendicular to the virtual diagonal D (not shown).

[0118] For example, in the case of the wooden member connecting members 10 located at the four corners of the wooden panel 32 in the upper left of the diagram, a component force F2 parallel to the virtual diagonal D, resulting from the decomposition of a portion of the horizontal force F1 acting on the upper beam 22 from left to right, pushes the gusset plate 9 toward the center C of the wooden panel 32. In this diagram, three wooden member connecting members 10 are connected to one gusset plate 9. The rear end 6b of the rod 6 is connected to the wooden flange portion 91 of the gusset plate 9 via a bolt 1 and a tall nut 7. As a result, the rear end 6b of the rod 6 moves in accordance with the movement of the wooden flange portion 91.

[0119] In this configuration, the component force F2 parallel to the virtual diagonal D, generated by the decomposition of the horizontal force F1, is transmitted as a compressive force from the flange portion 91 on the wood member side to the rod 6 via the high nut 7, pushing the rear end 6b of the rod toward the center C of the wood panel 32. Around the rod 6 at the non-threaded portion N, there are the inner circumferential surfaces of the hollow enlarged diameter portions 73, 58 of the high nut 7 or the lag screw bolt 5. Therefore, the range in which the expansion and contraction portion E of the rod 6 can bend is limited by the inner diameter of the hollow enlarged diameter portions 73, 58. Furthermore, there is only a small gap between the inner circumferential surfaces of the hollow enlarged diameter portions 73, 58 and the outer surface of the rod 6 at the non-threaded portion N. Therefore, the inner circumferential surfaces of the hollow enlarged diameter sections 73 and 58 prevent the rod 6 located at the non-threaded section N from bending. This prevents buckling due to misalignment of the rod 6.

[0120] Furthermore, a resistance force R1 is generated at the extension portion E of the rod 6 that resists the component force F2. This resistance force R1 pushes the flange portion 91 on the wood member side back toward the rear end. This allows it to resist the horizontal force F1 that pushes the upper beam 22 from left to right.

[0121] Next, in this figure, we will describe the wooden member connecting members 10 located at the four upper right corners of the same wooden panel 32. The axis Q of these wooden member connecting members 10 extends along a virtual diagonal D that runs from the upper right to the lower left. Therefore, when a horizontal force F1 is applied to the upper beam 22 pushing from left to right, a force is applied to the gusset plate 9 in a direction that moves it away from the wooden panel 32. In other words, the component force F3, which is generated from the decomposition of this horizontal force F1 and is parallel to the virtual diagonal D, pulls the wooden member side flange portion 91 of the gusset plate 9 toward the rear end in the axial direction Z. As a result, the rear end portion 6b of the rod member 6 is pulled toward the rear end via the bolt 1 and the tall nut 7. The tip portion 6a of the rod member 6 is screwed into the lag screw bolt 5 which is firmly screwed into the wooden panel 32. The displacement of the extension portion E of the rod member 6 in the axial direction Z is not constrained by anything. Therefore, the tensile force applied to the rear end 6b of the rod 6 causes the expandable portion E of the rod 6 to stretch, absorbing a portion of the component force F3. Also, as the stretched rod 6 tries to return to its original shape due to elastic force, a resistive force R2 is generated that pulls the gusset plate 9 toward the tip. The wooden member connecting member 10 is able to resist the horizontal force F1 pushing the upper beam 22 from left to right because this resistive force R2 pulls the wooden member side flange portion 91 of the gusset plate 9 toward the tip.

[0122] In this embodiment, the wooden seismic-resistant member 100 transmits the horizontal force F1 transmitted from the column-beam frame 20 to the rod 6, and resists the horizontal force F1 with the elastic force of the expandable portion E of the rod 6. For larger forces, the wooden member connecting member 10 absorbs the force by the plastic deformation of the rod 6. Furthermore, the wooden panel itself is made of CLT or LVL, which have excellent seismic performance. In addition, the wooden member connecting member 10 extends the pre-drilled holes 4 and the axes Q of each component 1, 7, 6, and 5 diagonally from the four corners of the wooden panel 32 along or parallel to the virtual diagonal D, and the expandable portion E of the rod 6 expands and contracts due to the elastic force. Therefore, the wooden seismic-resistant member 100 can resist the horizontal force F1 applied to the column-beam frame 20. Furthermore, when an even larger force is applied, the expansion and contraction portion E of the rod member 6 undergoes plastic deformation and absorbs the force.

[0123] Furthermore, since the wooden seismic-resistant member 100 is positioned diagonally from the four corners of the wooden panel 32 toward the center C, it is possible to obtain greater load-bearing capacity and high deformation performance with fewer connecting hardware than when connecting with steel plate insertion drift pin joints and embedded bolt joints.

[0124] Furthermore, since multiple wooden panels 32 are combined to form one wooden thick-panel surface material 31, the weight of each wooden panel 32 can be set to any size (width) so that it can be installed manually. Therefore, the wooden panels 32 can be carried in from the entrance on a trolley or the like, and old wooden panels 32 can be carried out. Consequently, the wooden seismic-resistant member 100 of this embodiment does not require a large lifting machine to lift the wooden panels 32, so the wooden seismic-resistant member 100 can be replaced even after completion. This means that, for example, if it becomes necessary to replace the wooden panels 32 due to a fire, the damaged wooden panels 32 can be replaced with new wooden panels 32. Also, when performing seismic retrofitting work, the wooden seismic-resistant member 100 can be installed as a new load-bearing wall by connecting the gusset plate 9 and the wooden panel 32 to the column-beam frame 20 where there was a normal wall.

[0125] Figure 11 is a view along the SS arrow in Figure 8. In this figure, 10 represents a wooden member connecting member, 100 represents a wooden seismic-resistant member, 20 represents a column-beam frame, 21 represents a column, 22 represents a beam, 32 represents a wooden panel, 3a represents an open end face, 41 represents a fire-resistant material, and 42 represents a sound-absorbing material. Also in this figure, 9 represents a gusset plate, 93 represents a web section, 91 represents a wooden member side flange section, 94 represents a rib section, 5 represents a lag screw bolt, 6 represents a rod, and 7 represents a tall nut. In apartment buildings, partition walls between adjacent units are often load-bearing walls. The wooden seismic-resistant member 100 in this diagram is a partition wall installed between adjacent dwelling units. Generally, when using wooden thick panel material 31 for walls that are part of the main structural components, a certain level of fire resistance is required depending on the building's use, size, or location. Furthermore, when using the wooden seismic-resistant member 100 as a partition wall, in addition to the fire resistance required for the main structural components, it also needs fire resistance to prevent the spread of fire to adjacent units and sound insulation.

[0126] As shown in this figure, when the wooden seismic-resistant member 100 of this embodiment is used as a partition wall, the cross-sectional structure is a laminated structure in which wooden thick plate surface material 31, fire-resistant material 41, sound-absorbing material 42, fire-resistant material 41, and wooden thick plate surface material 31 are arranged in that order. In other words, inside the column-beam frame 20, one pair of thick wooden panel panels 31 are placed on the innermost side of the dwelling unit, and a pair of fire-resistant materials 41 are placed between the pair of thick wooden panel panels 31, along the back side of each panel. Sound-absorbing material 42 is placed between the pair of fire-resistant materials 41. Although only the sound-absorbing material 42 is shown in this figure, a base material is also placed at the location where the sound-absorbing material 42 is placed (for example, behind the sound-absorbing material 42 in this figure). With this configuration, the wooden seismic-resistant member 100 has the laminated structure described above.

[0127] The fire-resistant material 41 may be, for example, gypsum board. The sound-absorbing material 42 may be, for example, glass wool board. Alternatively, instead of placing the sound-absorbing material 42, gaps for sound insulation may be placed as an air layer. The fire-resistant material 41 and sound-absorbing material 42 are in close contact with the inside of the column-beam frame 20. As a result, two adjacent dwelling units are completely separated by the fire-resistant material 41 and sound-absorbing material 42.

[0128] As described above, the wooden seismic-resistant member 100 of this embodiment has a fire-resistant material 41 and a sound-absorbing material 42 between two wooden thick panel materials 31, so that the wooden thick panel materials 31 can be used in an exposed state while ensuring fire resistance and sound insulation performance. In other words, for example, if a fire occurs in the dwelling unit on the right side of the diagram, even if the thick wooden panel 31 on the right side of the diagram is destroyed by fire, the fire-resistant material 41 on the right, the sound-absorbing material 42, the fire-resistant material 41 on the left, and the thick wooden panel 31 will remain unburned.

[0129] Therefore, even if the wood-based thick panel material 31 is used in an exposed state, the fire-resistant material 41 attached to the inside of the wood-based thick panel material 31 can prevent the spread of fire to the adjacent door, thus allowing the wood-based seismic-resistant member 100 to be used in the partition wall between doors. Furthermore, even if the thick wooden panel 31 on the right side is destroyed by fire, the thick wooden panel 31 on the left side remains unburned, so in terms of load-bearing capacity, the wooden seismic-resistant member 100 can maintain its seismic performance as a load-bearing wall. Therefore, even until the thick wooden panel 31 on the right side is replaced during the restoration work, the remaining wooden seismic-resistant member 100 can function as a load-bearing wall.

[0130] In this way, by using the wooden seismic-resistant member 100 in the partition wall, even if the wooden thick panel material 31 is used in an exposed state, the fire resistance, sound insulation, and seismic resistance of the partition wall can be maintained at a high level.

[0131] (Second Embodiment) Figure 12 is an enlarged cross-sectional view of portion M in Figure 8 of the wooden seismic-resistant member 100 of the second embodiment, which uses the wooden member connecting member 10 of the second embodiment. The second embodiment of the wooden seismic-resistant member 100, which uses the wooden member connecting member 10 of the second embodiment, has a wooden panel 32 that has a rearmost end surface 3b around the open end surface 3a, which is at the rear end of the open end surface 3a and in contact with the opposing surface 91b of the gusset plate 9. In other words, the second embodiment of the wooden member connecting member 10 differs from the first embodiment in that the rearmost end surface 3b that is in contact with the opposing surface 91b of the gusset plate 9 and the open end surface 3a where the pre-hole 4 is opened are separate surfaces, and the opening 4b of the pre-hole 4 is at the front end of the rearmost end surface 3b.

[0132] In this embodiment, the wooden seismic-resistant member 100 using the wooden member connecting member 10 receives the compressive force transmitted from the gusset plate 9 to the wooden member not only at the high nut 7 but also at the last end face 3b of the wooden panel 32. As a result, energy is absorbed not only by the compression of the expansion and contraction portion E of the rod 6, but also by the compression of the wooden member 3 (wooden panel 32). Therefore, the wooden seismic-resistant member 100 using the wooden member connecting member 10 of the second embodiment can exhibit greater resistance to compressive force than the first embodiment.

[0133] Figure 13 shows the view from the JJ arrow in Figure 12 and a cross-sectional view of KK. Figures 13(A), 13(C), and 13(E) are the view from the JJ arrow in Figure 12. Figures 13(B), 13(D), and 13(F) are cross-sectional views of KK in Figure 12. In this figure, G1 is the socket for turning nuts on an electric drill, G2 is the wrench, 3a is the open end face, 3b is the rear end face, 3c is the wood surface of the wood member 3, 3d is the wood back surface of the wood member 3, 3e is the opening, and 91b is the opposing surface of the gusset plate 9.

[0134] (First embodiment of wood panel 32) Figures 13(A) and 13(B) are a view along the JJ arrow and a cross-sectional view along the KK arrow in Figure 12, respectively, when the wood panel 32 is the first embodiment. The wooden panel 32 of the first embodiment is characterized in that the space extending in the axial direction Z from the opening end face 3a to the rearmost end face 3b (a cylindrical space enclosed by a dashed line in the figure) is open only on the rear end side. For example, as shown in the figure, a recess sized to accommodate the nut-rotating socket G1 of an electric drill is provided on the rear end face 3b, and a pilot hole 4 may be opened at the bottom of the recess.

[0135] When connecting the wooden panel 32 of this embodiment to the member to be joined 2, first, the tall nut 7 is rotated with the nut rotating socket G1 until the rear end 7a of the tall nut 7 is flush with the last end face 3b. Alternatively, the tall nut 7 may be rotated until the rear end 7a of the tall nut is positioned towards the front end by the thickness of the washer 11, beyond the rearmost end face 3b.

[0136] After that, the washer 11 and gusset plate 9 are placed over the rearmost end face 3b and secured with bolt 1. In other words, in this embodiment, the tall nut 7 cannot be turned from the outside of the wooden panel 32 after the gusset plate 9 has been placed over the rearmost end face 3b. Therefore, the tall nut 7 is first fixed to the finished height H (the height that is flush with the rearmost end face 3b), and then the gusset plate 9 is placed over it and the bolt 1 is tightened securely to connect the wooden member connecting member 10 to the gusset plate 9. Other features, effects, manufacturing method, and construction method of the wooden seismic-resistant member 100 of the second embodiment, which uses the wooden panel 32 of the first embodiment, are the same as those of the wooden seismic-resistant member 100 of the first embodiment.

[0137] (Second embodiment of wood panel 32) Figures 13(C) and 13(D) are a view along the JJ arrow and a cross-sectional view along the KK arrow in Figure 12, respectively, when the wood panel 32 is the second embodiment. The wood panel 32 of the second embodiment is characterized in that the space extending in the axial direction Z from the open end face 3a to the rear end face 3b (the space enclosed by the dashed line in the figure) has openings 3e in two directions: towards the rear end and towards the wood surface 3c.

[0138] This configuration allows the wrench G2 to be inserted from the opening 3e on the interior side (wood surface 3c side), enabling the bolt 1 to be rotated while the high nut 7 is held in place with the wrench G2. Furthermore, even after the wood panel 32 has been fastened to the gusset plate 9 with the bolt 1, the high nut 7 can be securely tightened onto the bolt 1. Therefore, since loosening of the connection to the gusset plate 9 is eliminated, a wooden seismic-resistant member 100 can be provided in which the rod 6 is even less prone to buckling. Also, since the high nut 7 can be contacted from the wood surface 3c side, it is easier to install than when the wooden panel 32 is the first embodiment. Other features, effects, and manufacturing methods of the second embodiment of the wooden seismic-resistant member 100 using the wooden panel 32 of the second embodiment are the same as when the wooden panel 32 is the first embodiment.

[0139] (Third embodiment of wood panel 32) Figures 13(E) and 13(F) are a view along the JJ arrow and a cross-sectional view along the KK arrow in Figure 12, respectively, when the wood panel 32 is the third embodiment. The third embodiment of the wood panel 32 is characterized in that the space extending in the axial direction Z from the opening end face 3a to the rearmost end face 3b (a rectangular parallelepiped space enclosed by a dashed line in the figure) has openings 3e in three directions: the rear end side, the wood surface 3c side, and the wood back side 3d side.

[0140] In the third embodiment, the space described above penetrates from the wood surface 3c to the wood back surface 3d, making it easy to create the shapes of the open end face 3a and the rear end face 3b. In other words, the open end face 3a can be easily formed by cutting a rectangular notch into the rear end face 3b. Furthermore, as in the second embodiment, the wooden panel 32 can contact the tall nut 7 from the opening 3e on the indoor side (wood surface 3c side), so the tall nut 7 can be tightened tightly with the wrench G2, preventing buckling of the rod 6 due to loosening of the fastening with the gusset plate 9. Other features, effects, and manufacturing methods of the wooden seismic-resistant member 100 of the second embodiment using the wooden panel 32 of the third embodiment are the same as when the wooden panel 32 is of the second embodiment.

[0141] (Third embodiment) Figure 14 shows (A) a right side cross-sectional view of the wooden member connecting member 10 of the third embodiment, (B) a front cross-sectional view of the high nut 7 of the wooden member connecting member 10 of the third embodiment, (C) a view from arrow II in Figure 14(B) (plan view), and (D) a front view. The third embodiment of the wooden seismic-resistant member 100 is characterized in that the rearmost end face 3b of the wooden panel 32 is in contact with the opposing surface 91b of the gusset plate 9, and a pre-drilled hole 4 is opened in the rearmost end face 3b. In other words, the open end face 3a of the third embodiment is the rearmost end face 3b that is in contact with the gusset plate 9.

[0142] In the third embodiment, the rear end 7a of the tall nut 7 of the wooden member connecting member 10 may be provided with a slotted or slotted groove 74 for inserting a slotted or slotted screwdriver. Figure 14 shows that a slotted groove 74 is provided on the rear end 7a of the tall nut. Because the tall nut 7 is provided with a groove 74 for turning with a screwdriver, the tall nut 7 can be turned until the rear end 7a of the tall nut is flush with the last end face 3b of the wooden member 3, or until it is submerged in the pre-hole 4 by the thickness of the washer 11 beyond the last end face 3b.

[0143] This allows the gusset plate 9 to be securely fastened to the rearmost end face 3b with the bolt 1, thereby enabling a firm connection between the high nut 7 and the bolt 1. In the third embodiment of the wooden member connecting member 10, the configuration for rotating the high nut 7 may be done by other means. The other configurations, usage methods, manufacturing methods, installation methods, and effects of the wooden member connecting member 10 of the third embodiment are the same as those of the first or second embodiment.

[0144] (Fourth Embodiment) Figure 15 is a right-side cross-sectional view of the wooden member connecting member 10 of the fourth embodiment for illustrating the absorption of compressive force. Figure 15(A) shows the wooden member connecting member 10 before being subjected to tensile force (before use), Figure 15(B) shows it after being subjected to tensile force, and Figure 15(C) shows it after being subjected to compressive force after Figure 15(B). The wooden member connecting member 10 of the fourth embodiment differs from the first to third embodiments in that it has no shrinkage allowance T. That is, as shown in Figure 15(A), the screw rear end 54 of the lag screw bolt 5 of the fourth embodiment, before tensile force is applied (before use), abuts against the tip 7b of the high nut 7.

[0145] When a tensile force is applied to the rod 6 due to an earthquake or the like, as shown in Figure 15(B), the expansion and contraction portion E of the rod 6 stretches due to the tensile force, absorbing a portion of the tensile force, and then attempts to return to its original length due to elastic force. However, since the rod 6 does not return completely to its original length, after the tensile force is applied, a gap U in the axial direction Z is created between the screw rear end 54 of the lag screw bolt 5 and the high nut tip 7b of the high nut 7 by the amount that the expansion and contraction portion E has stretched. This gap U performs a function similar to the contraction allowance T. In other words, after being subjected to a tensile force, the high nut 7 and the lag screw bolt 5 can move closer together by the distance of the gap U created by the stretching of the rod 6. Subsequently, when the wooden member connecting member 10 is subjected to a compressive force, the expansion and contraction portion E of the rod 6 plastically deforms by the distance of the gap U, and can absorb a portion of the compressive force. Although Figure 15 shows the same wood panel 32 as in Figure 13(F), the wood member 3 to which the wood member connecting member 10 of the fourth embodiment is connected is not limited to this, and may be any shape of wood member 3 from the first to third embodiments. The other configurations, usage methods, manufacturing methods, installation methods, and effects of the wooden member connecting member 10 of the fourth embodiment are the same as those of the first to third embodiments.

[0146] (Fifth embodiment) In the embodiments described above, examples were given where the wooden member 3 is a wooden panel 32 or where the wooden member connecting member 10 is used in a wooden seismic-resistant member 100. However, the wooden member connecting member 10 of the present invention may also be used to connect the ends of columns and beams. The wooden member 3 to which the wooden member connecting member 10 of the fifth embodiment is joined may be a long member such as a square bar or a round bar, and may be a wooden column or a wooden beam. In other words, the wooden seismic-resistant member 100 of the fifth embodiment may be a structure that uses the wooden member connecting member 10 of the first to fourth embodiments to connect the ends of wooden columns or beams. In addition, the number of wooden member connecting members 10 (for example, the number of lag screw bolts, etc.) and shape (for example, the shape of the gusset plate 9) of the wooden seismic-resistant member 100 of this embodiment can also be arbitrarily set.

[0147] For example, the wooden member connecting member 10 of the fifth embodiment may constitute a wooden member connecting structure of the fifth embodiment by joining a wooden column and a wooden beam. In the fifth embodiment, one gusset plate 9 is placed between the column and the beam. When the column is considered as "wooden member 3" in the wooden member connecting member 10, the beam corresponds to "member to be joined 2" in the wooden member connecting member 10. Similarly, when the beam is considered as "wooden member 3" in the wooden member connecting member 10, the column corresponds to "member to be joined 2" in the wooden member connecting member 10.

[0148] In this case, pre-drilled holes 4 are provided in both the wooden column and the wooden beam, and they are connected to a gusset plate 9 provided between the column and the beam by wooden member connecting members 10. In this case, it is preferable that at least one of the column and beam has an open end face 3a or a rear end face 3b in its longitudinal direction.

[0149] Alternatively, the wooden seismic-resistant member 100 of the fifth embodiment may be a hybrid structure formed by joining a wooden column or wooden beam with a reinforced concrete, steel-reinforced concrete, or steel frame structure. In this case, wooden columns or wooden beams fall under the category of wooden members 3, while reinforced concrete, steel-reinforced concrete, or steel-framed structures fall under the category of joined members 2. Furthermore, it is preferable that the end face in the longitudinal direction of the column or beam be either an open end face 3a or a rearmost end face 3b.

[0150] For example, if the wooden seismic-resistant member 100 of the fifth embodiment is a mixed structure, it may be a structure in which a gusset plate 9 is fixed on a reinforced concrete floor and wooden columns are erected on top of it. In that case, the reinforced concrete floor corresponds to the "connected member 2" in the wooden member connecting member 10, and the columns correspond to the "wooden member 3" in the wooden member connecting member 10. The wooden member connecting member 10 of the fifth embodiment, the other configurations, usage methods, manufacturing methods, construction methods, and effects of the mixed structure of the fifth embodiment are the same as those of the first to fourth embodiments.

[0151] According to the present invention described above, since the tall nut 7 is inserted into the pre-hole 4 over a range longer than the maximum expected extension length of the expandable portion E, even when the rod 6 is extended to its maximum extent, the tall nut 7 will not come out of the pre-hole 4. Therefore, buckling of the rod 6 caused by the high nut 7 being unable to return to the pre-hole 4 when subjected to compressive force after being dislodged from the pre-hole 4 can be prevented.

[0152] Furthermore, the tip 6a of the rod stock 6 that screws onto the lag screw bolt 5 is fixed coaxially with the pilot hole 4. Since the rod stock 6 is positioned coaxially with the pilot hole 4, the rod stock 6 extends axially Z along axis Q. The rear end 6b of the rod stock 6 is screwed onto a tall nut 7 that is screwed onto a bolt 1, and the bolt 1 and tall nut 7 are also positioned coaxially with the pilot hole 4. The inner surface of the pilot hole 4 then restrains the direction of displacement of the tall nut 7 in the axial direction Z. In this invention, the pre-drilled hole 4 not only functions as a hole for fixing the wooden member connecting member 10 inside the wooden member 3, but also functions as a guide that directs the movement of the tall nut 7 only in the axial direction Z.

[0153] In this configuration, the rod 6 has both ends 6a and 6b always on axis Q, and the movement of the rear end 6b of the rod is restricted to the axial direction Z, allowing it to expand and contract. Therefore, the wooden member connecting member 10 of the present invention can prevent the rod 6 from buckling due to a misalignment of the center of the rear end 6b of the rod.

[0154] Furthermore, the wooden member connecting member 10 of the present invention has an expandable portion E between the rod 6 and the first threaded portion S1 that screws onto the lag screw bolt 5 and the second threaded portion S2 that screws onto the tall nut 7. The wooden member connecting member 10 of the present invention has a non-threaded portion N in either the hollow portion 71 of the tall nut 7 or the hollow portion 55 of the lag screw bolt 5, or both, that allows displacement of the expandable portion E in the axial direction Z. In other words, the wooden member connecting member 10 of the present invention has a portion (non-threaded portion N) in the telescopic portion E of the rod 6 that is located within the hollow portions 71, 55 of the tall nut 7 or lag screw bolt 5 but is not screwed into the tall nut 7 or lag screw bolt 5. Both the tall nut 7 and the lag screw bolt 5 are arranged coaxially with the pre-drilled hole 4.

[0155] Therefore, when a compressive force is applied to the wooden member connecting member 10 due to an earthquake, the tall nut 7 or lag screw bolt 5 located at the non-threaded portion N prevents the rod 6 from moving radially relative to the axis Q and coming off the axis Q. As a result, the wooden member connecting member 10 of the present invention can also prevent buckling of the rod 6 due to the misalignment of the center of the expandable portion E.

[0156] It should be noted that the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention. [Explanation of symbols]

[0157] 1 bolt (high-strength bolt), 1a shaft, 1b head, 2 Parts to be joined, 3 wooden member, 3a open end face, 3b rearmost end face, 3c wooden surface, 3d wooden back side, 3e opening, 4 tip hole, 4a bottom, 4b opening, 4c inner cavity, 4d inner surface, 5 lag screw bolt, 51 shaft part, 52 wood thread, 54 Rear end of screw, 55 Hollow part of lag screw bolt, 56 Screw tip, 57 Screw female thread section, 58 Hollow enlarged diameter section of lag screw bolt, 6,60A,60B,60C bar material, 6a Rod tip, 6b Rod rear end, 61 Male thread at the tip of the rod, 62 Male thread at the rear end of the rod, 63 Shaft portion, 7. High nut, 7a. One end of the high nut (rear end of the high nut), 7b The other end of the tall nut (tip of the tall nut), 71 Hollow part of the tall nut, 72 Female threaded part of the nut, 73 High nut hollow enlarged diameter section, 74 Groove, 9 gusset plates, 91 Flange portion on the wood member side, 91a Hole, 91b Opposing surface, 92 Flange portion on the member to be joined, 93 Web section, 94 Rib section 10 Wooden member connecting member, 11 Washers, 20 Column-beam frame, 21 Columns, 22 Beams, 31. Wood-based thick paneling material, 32 wood panels, 32A A wood panel with a width of 1,575 mm. 32B A wood panel with a width of 787.5 mm. 32C: A wooden panel with a width of 1,000 mm. 33 Slope, 34 Top surface, 35 Side surface, 36 Notch, 41 Fireproof materials, 42 Sound absorbing materials, 43. The gap between the column-beam frame and the timber panel, 44 studs with heads, 100 wooden seismic-resistant members, 500 Conventional connecting member, 509 Gusset plate, 550 Screw component, 557 Female thread, 552 Hollow hole, 560 Steel rod, 561 Intermediate shaft section, 563 Shaft section between nuts, 570A, 570B nuts, A. The virtual centerline of the beam, B Virtual vertical line, C The center of the wood panel, which is the intersection of the virtual diagonals. D virtual diagonal, E telescopic part, E max The length of the extension portion of the rod when subjected to the maximum kinetic energy within the expected range, E pre The length of the expanded portion of the rod before it is subjected to tensile force, F1 Horizontal force pushing horizontally against the beam, F2, F3 are components of the horizontal force parallel to the virtual diagonal D. G1 Socket for turning nuts on electric drills, G2 Wrench, H Finished height, L The axial length of the area in which the tall nut of the wooden connecting member is inserted into the pre-drilled hole before use. MAX Maximum expected extension length of the stretchable part, N Non-threaded part, Q axis, R1, R2 Resistance force generated in wooden seismic-resistant members against horizontal forces, S1 First screw section, S2 2nd threaded part, T shrinkage allowance, U gap, V virtual plane, Z axis direction

Claims

1. A wooden member connecting member for joining a wooden member and a member to be joined, A gusset plate fixed to the member to be joined, A bolt that engages with the gusset plate, A tall nut that is screwed onto the aforementioned bolt, A lag screw bolt having a male screw for wood provided on the circumferential surface of the shaft, fixed to the bottom side of a pre-drilled hole opening in the open end face of the wooden member, a hollow portion opening at the rear end of the screw, and a female screw portion provided in the hollow portion, The rod material comprises a rod tip and the female screw portion of the lag screw bolt, which are screwed together, and a second screw portion, which are screwed together, with an expandable portion between the rod tip and the high nut, The bolt, the tall nut, the rod, and the lag screw bolt share the same axis as the pre-drilled hole. Furthermore, the wooden member connecting member is provided with a non-threaded portion in either the hollow portion of the tall nut or the hollow portion of the lag screw bolt, or both, that allows displacement of the expansion and contraction portion in the axial direction of the pre-drilled hole. The aforementioned tall nut is a wooden member connecting member, in which a length longer than the maximum expected extension length of the expandable portion is inserted into the pre-drilled hole, and the direction of displacement is constrained in the axial direction by the inner surface of the pre-drilled hole.

2. The wood member connecting member according to claim 1, wherein the lag screw bolt has the rear end of the screw in a position close to the high nut.

3. The wood member connecting member according to claim 1, wherein the bolt is a high-strength bolt having greater tensile strength than the rod material.

4. The non-threaded portion is the area between the second threaded portion and the tip of the high nut located further forward than the second threaded portion. The tall nut has a tall nut hollow enlarged diameter portion in the non-threaded portion, the minimum inner diameter of which is larger than the maximum diameter of the second threaded portion of the rod material or the maximum inner diameter of the hollow portion of the tall nut in the second threaded portion. The wooden member connecting member according to claim 1, wherein the hollow, enlarged diameter portion of the tall nut restricts the displacement of the expandable portion in the radial direction around the axis.

5. The non-threaded portion is the area between the female threaded portion of the screw located at the tip of the hollow portion of the lag screw bolt and the rear end of the screw. The lag screw bolt has a hollow enlarged diameter portion in the non-threaded portion, the minimum inner diameter of which is larger than the maximum diameter of the first threaded portion of the rod or the maximum inner diameter of the female thread portion of the screw. The wood member connecting member according to claim 1, wherein the hollow, expanded diameter portion of the lag screw bolt restricts the displacement of the expanding / contracting portion in the radial direction around the axis.

6. The non-threaded portion is located in at least one of the following locations: between the second threaded portion and the tip of the high nut within the hollow portion of the high nut, and between the rear end of the screw and the first threaded portion within the hollow portion of the lag screw bolt. The entire hollow section is threaded with an internal screw. The wooden member connecting member according to claim 1, wherein the maximum diameter of the expandable portion in the non-threaded portion is smaller than the minimum diameter of the rod material in the first threaded portion or the second threaded portion closest to the non-threaded portion.

7. The wood member connecting member according to claim 1, wherein the open end face is the rearmost end face of the wood member that is closest to the opposing surface of the gusset plate and extends parallel to the opposing surface, and is positioned at a distance from the opposing surface.

8. The wooden member connecting member according to claim 1, wherein the wooden member has a rearmost end surface around the open end surface that contacts the opposing surface of the gusset plate at a rear end side of the open end surface.

9. The wood member connecting member according to claim 8, wherein the space extending in the axial direction from the opening end face to the rearmost end face opens at least on the wood surface side and the rear end side of the wood member.

10. The wooden member connecting member according to claim 1, wherein the open end face is the rearmost end face that contacts the opposing surface of the gusset plate.

11. The rear end of the screw abuts against the tall nut, as described in claim 1.

12. A wooden seismic-resistant member comprising a wooden member connecting member as described in claim 1, A wood-based thick panel surface consisting of multiple wood panels or a single wood panel arranged horizontally on a surface in a front view, The aforementioned thick wooden panel is surrounded on all four sides by a reinforced concrete, steel-reinforced concrete, or steel-framed column and beam frame, The system includes wooden connecting members that are positioned diagonally from the four corners of each wooden panel toward the center of the wooden panel, connecting the column and beam frame to each wooden panel. The aforementioned wooden member is the aforementioned wooden panel, The member to be joined is the column-beam frame, A wooden seismic-resistant member, in which multiple gusset plates are fixed to the inside of the column-beam frame.

13. The aforementioned wooden panel has notches at its four corners, which are cut out by a slope that intersects its upper or lower surface with its side surface. The wooden seismic-resistant member according to claim 12, wherein the slope is the open end face or the rearmost end face extending parallel to the opposing surface of the gusset plate at the rear end of the open end face.

14. A lag screw bolt constituting a wooden member connecting member as described in claim 1, The lag screw bolt has the screw female thread portion located at the tip of the hollow portion, Between the rear end of the screw and the female thread portion of the screw, there is a hollow enlarged diameter portion of the lag screw bolt that extends in the axial direction and has a minimum inner diameter larger than the maximum diameter of the first threaded portion of the rod or the maximum inner diameter of the female thread portion of the screw, The hollow, enlarged diameter portion of the lag screw bolt limits the displacement of the expansion and contraction portion in the radial direction around the axis.

15. The wooden member connecting member and the wooden member as described in claim 1 are provided, The aforementioned wooden member is a column or beam, a wooden seismic-resistant member.

16. A hollow section that penetrates axially from one end to the other, A nut female thread portion is provided at one end of the hollow portion, The hollow portion comprises a high nut hollow enlarged diameter portion that extends in the axial direction from the other end to the nut female thread portion, A tall nut wherein the minimum inner diameter of the hollow enlarged portion of the tall nut is larger than the maximum inner diameter of the female thread portion of the nut.

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