Joining structure of wooden materials to steel structural materials and joining method of wooden materials to steel structural materials

Abstract

To provide a joining structure for joining wooden materials to steel structural materials, which can be joined using general-purpose screws without any special processing being performed on the wooden materials in advance, and a joining method for joining wooden materials to steel structural materials. [Solution] A structure 1 for joining wooden material to steel structural material comprises a steel structural material 2 having a circular through hole 4, a wooden material 3 joined to the top surface of the steel structural material 2, a circular annular flat washer 5 fixed to the outer periphery of the circular through hole 4 on the underside of the steel structural material 2, and a wood screw 6 that passes through a central hole 9 of the flat washer 5 and the circular through hole 4 of the steel structural material 2 to join the wooden material 3 from below, wherein the diameter of the screw head 12 of the wood screw 6 is shorter than the diameter of the circular through hole 4, the diameter of the outer periphery of the flat washer 5 is longer than the diameter of the circular through hole 4 and the diameter of the central hole 9 of the flat washer 5 is shorter than the diameter of the screw head 12 of the wood screw 6, and the flat washer 5 has a positioning portion 10 that protrudes so as to contact the inner periphery of the circular through hole 4.

Description

[Technical Field]

[0001] The present invention relates to a joining structure of a wooden material to a steel structural material and a method of joining a wooden material to a steel structural material. [Background technology]

[0002] Conventionally, wooden materials have been fastened to steel structural members such as steel beams to secure various components, for example, wooden timbers such as framework members or furring members are fastened to the flanges of H-shaped steel beams. When fastening wooden materials to steel structural members, through holes are formed in the wooden material in advance, and bolts are inserted into circular through holes provided in flat parts such as the flanges of the steel structural members and the through holes in the wooden material, and then fastened with nuts from the opposite side to fasten the steel structural member and the wooden material.

[0003] In order to further improve the workability of joining steel structural members and wooden members, instead of joining using bolts and nuts, a method has been proposed in which a flat piece of wood is placed on the side of a circular through-hole in the steel structural member opposite the wooden member side, and a screw is driven through the wooden piece and the circular through-hole into the wooden member (see Patent Document 1). With this configuration, even if the diameter of the screw head is smaller than the circular through-hole, it is possible to join the wooden member to the steel structural member by inserting the piece of wood. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-348967 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when joining wooden materials to steel structural materials using a circular through-hole with a diameter larger than the screw head by inserting a piece of wood between them, it is necessary to mark the screw position on the piece of wood in advance, which increases the amount of work required. Also, it is difficult to drive the screw into the center of the circular through-hole, and if the wooden material is thin, the wooden material may not be sufficiently fixed depending on the position where the screw is driven.

[0006] Therefore, the present invention aims to provide a joining structure for joining wooden materials to steel structural materials, which can be joined using general-purpose screws without any special prior processing of the wooden materials, and a joining method for joining wooden materials to steel structural materials. [Means for solving the problem]

[0007] A first invention for solving the above problems provides a joining structure for joining wooden material to steel structural material, comprising: a steel structural material having a circular through hole; a wooden material joined to the upper surface of the steel structural material; a circular annular flat washer fixed to the outer periphery of the circular through hole on the underside of the steel structural material; and a wood screw that passes through a center hole of the flat washer and the circular through hole of the steel structural material to join the wooden material from below, the diameter of the head of the wood screw being shorter than the diameter of the circular through hole, the diameter of the outer periphery of the flat washer being longer than the diameter of the circular through hole, and the diameter of the center hole of the flat washer being shorter than the diameter of the head of the wood screw, and the flat washer is formed with a positioning portion that protrudes so as to contact the inner periphery of the circular through hole, The steel structural material is an H-shaped steel beam with flanges arranged above and below, the flanges having the circular through-holes formed in advance, the wooden material is a square timber joined to the upper surface of either the upper or lower flange along the length of the H-shaped steel beam, the positioning portion is concentric with the outer circumferential circle and center hole of the flat washer, and is formed in a circle that is in contact with the inner periphery of the circular through-hole, the positioning portion is formed to protrude toward the circular through-hole, an adhesive layer is formed only outside the positioning portion of the flat washer, and the positioning portion protrudes toward the steel structural material beyond the adhesive layer. .

[0008] The joining structure of a wooden material to a steel structural material of the second invention comprises a steel structural material having a circular through hole, a wooden material joined to the upper surface of the steel structural material, a circular annular flat washer fixed to the outer periphery of the circular through hole on the underside of the steel structural material, and a wood screw that passes through a center hole of the flat washer and the circular through hole of the steel structural material to join the wooden material from below, wherein the diameter of the head of the wood screw is shorter than the diameter of the circular through hole, the diameter of the outer periphery of the flat washer is longer than the diameter of the circular through hole, the diameter of the center hole of the flat washer is shorter than the diameter of the head of the wood screw, and the flat washer has a positioning portion formed on it that protrudes so as to contact the inner periphery of the circular through hole, The steel structural material is an H-shaped steel beam with flanges arranged above and below, and the circular through holes are formed in the flanges in advance. The wooden material is a square timber that is joined to the top surface of either the upper or lower flange along the length of the H-shaped steel beam. The flat washer has magnetic force and can be attached and detached to the steel structural material.

[0009] The third invention is a structure for joining wooden material to a steel structural material according to the first or second invention, wherein the positioning portions are formed at a plurality of positions concentric with the outer periphery and central hole of the flat washer, and at a plurality of positions tangent to the inner periphery of the circular through hole, so as to protrude toward the circular through hole.

[0010] The fourth invention is a structure for joining wooden material to a steel structural material according to any one of the first to third inventions, wherein the positioning portion is concentric with the outer circumference and center hole of the flat washer, and is formed in a circle that is tangent to the inner circumference of the circular through hole, and the positioning portion protrudes toward the circular through hole.

[0013] The fifth invention is any one of the first to fourth inventions. The invention provides a method for joining wooden material to steel structural material, which forms a joint structure of wooden material to steel structural material, and includes the steps of placing the wooden material on the upper surface of the steel structural material, temporarily fastening the flat washer to the lower surface of the steel structural material, and joining the wooden screw to the wooden material from below through the central hole of the flat washer and the circular through hole of the steel structural material. [Effects of the Invention]

[0014] 1st or 2ndAccording to the structure for joining wooden materials to steel structural members, the wooden material is placed on the top surface of a steel structural member having a circular through-hole, a flat washer is fixed to the outer periphery of the circular through-hole on the underside of the steel structural member, and a wood screw is fastened from below through the flat washer's central hole and the circular through-hole in the steel structural member to join the wooden material and the steel structural member. If the diameter of the wood screw head is smaller than the diameter of the circular through-hole, the diameter of the flat washer's outer periphery is longer than the diameter of the circular through-hole and the diameter of the flat washer's central hole is shorter than the diameter of the wood screw head, so that the wood screw head abuts against the flat washer and is fixed. This allows the wooden material to be joined to the steel structural member without any special prior processing and using a general-purpose screw of sufficient diameter to fasten the wood screw. Furthermore, the positioning portion ensures that the flat washer is positioned appropriately relative to the circular through-hole, allowing the wood screw to be driven in the appropriate position, improving installation accuracy.

[0015] 1st or 2nd According to the joining structure of wooden materials to steel structural materials of the present invention, the steel structural materials are H-shaped steel beams with flanges arranged above and below, and circular through holes are formed in the flanges in advance, and the wooden materials are square timbers that are joined to the top surface of either the upper or lower flange along the length of the H-shaped steel beam.Therefore, when fixing the square timber wooden materials to the top surface of the flanges using the circular through holes originally provided in the flanges of the H-shaped steel beam, they can be fixed using wood screws with heads that have a smaller diameter than the diameter of the circular through holes provided in the flanges, so there is no need to make the diameter of the wood screws larger than necessary, and the wooden materials can be joined with sufficient strength.

[0016] According to the joining structure of wooden material to steel structural material of the third invention, the positioning portions are formed at multiple positions concentric with the outer periphery and center hole of the flat washer, and at multiple positions tangent to the inner periphery of the circular through hole, protruding toward the circular through hole. Therefore, the flat washer is positioned at the appropriate position and the wood screw is driven into the wooden material at the appropriate position, so that the wooden material and steel structural material can be joined with appropriate strength.

[0017] According to the joining structure of wooden material to steel structural material of the fourth invention, the positioning portion is formed in a circle that is concentric with the outer circle and center hole of the flat washer and is in contact with the inner circumference of the circular through hole, so that the flat washer can be positioned easily and reliably, and by placing the flat washer in the appropriate position and driving the wood screw in appropriately, the wooden material and steel structural material can be joined with appropriate strength.

[0018] First Invention According to the structure for joining wooden material to steel structural material, the adhesive layer is formed only outside the positioning portion of the flat washer, and the positioning portion protrudes further toward the steel structural material than the adhesive layer. Therefore, when the flat washer is not positioned in the appropriate position, the positioning portion acts as a spacer and the adhesive layer does not come into contact with the steel structural material. When the positioning portion is inserted into the circular through-hole, the adhesive layer comes into contact with the steel structural material and can be temporarily fixed. Therefore, the flat washer can be positioned in the appropriate position, and temporary fixing can also improve workability.

[0019] Second Invention According to the structure for joining wooden material to steel structural material, the flat washer has magnetic force and is detachable from the steel structural material, so that the flat washer can be easily temporarily fixed in an appropriate position on the steel structural material.

[0020] Fifth Invention According to the method of joining wooden materials to steel structural materials, a flat washer is temporarily attached to the underside of the steel structural material, and then a wood screw is driven into the wooden material from below through the center hole of the flat washer and the circular through hole of the steel structural material, making construction easier and allowing the wood screw to be driven into the appropriate position. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a perspective view illustrating the configuration of a joining structure for joining a wooden material to a steel structural material. [Figure 2] FIG. 1 is a cross-sectional view illustrating the configuration of a joining structure of a wooden material to a steel structural material. [Figure 3] 1A and 1B are diagrams illustrating the configuration of a flat washer, where (A) is a plan view, (B) is a cross-sectional view, and (C) is an enlarged view of the α portion of (B). [Figure 4] A diagram explaining the dimensions of the circular through hole in the steel structural material, the center hole in the flat washer, and the screw head of the wood screw. [Figure 5] 10 is a diagram illustrating the process of placing a wooden material on the top surface of a steel structural material and temporarily fastening a flat washer to the bottom surface of the steel structural material. [Figure 6] This is a diagram explaining the process of attaching a wood screw to a wooden material from below, passing it through the center hole of a flat washer and the circular through hole of a steel structural material. [Figure 7] FIG. 10 is a diagram illustrating the state in which a wooden material and a steel structural material are joined by screwing a wood screw into the wooden material. [Figure 8] FIG. 10 is a diagram illustrating a first modified example in which the flat washer is configured to have magnetic force instead of having an adhesive layer. [Figure 9] 10A and 10B are diagrams illustrating a state in which the positioning portion has been changed from a circular ring shape to a shape of multiple protrusions. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, embodiments of a joining structure 1 and joining method for wooden materials to steel structural materials of the present invention will be described with reference to the drawings. The joining structure 1 for wooden materials to steel structural materials is a structure in which a wooden material 3 is joined to the upper surface of a steel structural material 2 that constitutes a building. As shown in Figures 1 and 2, the joining structure 1 for wooden materials to steel structural materials includes a steel structural material 2 having a circular through hole 4, a wooden material 3 joined to the upper surface of the steel structural material 2, a flat washer 5 fixed to the outer periphery of the circular through hole 4 on the underside of the steel structural material 2, and a wood screw 6 that passes through a center hole 9 of the flat washer 5 and the circular through hole 4 of the steel structural material 2 to join the wooden material 3 from below.

[0023] The steel structural member 2 is, for example, an H-shaped steel beam that serves as the structural frame of a building. The H-shaped steel beam has flanges 7 installed horizontally at the top and bottom, and the upper and lower flanges 7 are connected by a web 8, and each flange 7 has a plurality of circular through holes 4 arranged in a row. The wooden member 3 is a square timber that serves as a base for fixing various components used in the building to the steel structural member 2.

[0024] As shown in FIG. 3 , the flat washer 5 is a flat annular shape, with a central hole 9 and an outer periphery formed concentrically. The flat washer 5 is formed with a positioning portion 10 for positioning the flat washer 5 so that it overlaps with the circular through-hole 4 when the flat washer 5 is abutted against the flange 7 of the steel structural material 2. The positioning portion 10 is a circular step. The positioning portion 10, the central hole 9, and the outer periphery of the flat washer 5 are arranged concentrically. When the flat washer 5 is abutted against the steel structural material 2, the positioning portion 10 protrudes toward the steel structural material 2 and is formed so as to be inserted into the circular through-hole 4. The positioning portion 10 is formed with a diameter slightly smaller than the circular through-hole 4, and when the positioning portion 10 is inserted into the circular through-hole 4, the positioning portion 10 abuts against the inner periphery of the circular through-hole 4, positioning the flat washer 5 in the appropriate position. The positioning portion 10 is formed so that its diameter decreases in the protruding direction, making it easy to insert the positioning portion 10 into the circular through-hole 4.

[0025] An adhesive layer 11 is formed on the surface of the flat washer 5 radially outward from the positioning portion 10 and facing the steel structural material 2. The adhesive layer 11 is formed by spreading a thin layer of adhesive, and temporarily fixes the flat washer 5 to the steel structural material 2 during construction. The positioning portion 10 is formed radially inward from the position where the adhesive layer 11 of the flat washer 5 is formed, and the length of the positioning portion 10 protruding toward the steel structural material 2 is longer than the thickness of the adhesive layer 11. As a result, when the flat washer 5 is positioned so that the positioning portion 10 is offset from the position of the circular through-hole 4, the positioning portion 10 abuts against the underside of the steel structural material 2, and the positioning portion 10 acts as a spacer to prevent the adhesive from adhering to the steel structural material 2. When the positioning portion 10 is inserted into the circular through-hole 4 of the steel structural material 2, the adhesive layer 11 adheres to the steel structural material 2.

[0026] As shown in Figure 4, the outer diameter d of flat washer 5 is longer than the diameter a of circular through hole 4 in steel structural material 2, and positioning portion 10 is slightly smaller in diameter than circular through hole 4, so that flat washer 5 is positioned in the appropriate position when positioning portion 10 abuts against the inner circumference of circular through hole 4. Diameter b of center hole 9 of flat washer 5 is formed shorter than diameter c of screw head 12 of wood screw 6, which will be described later, so that even if diameter c of screw head 12 is smaller than diameter a of circular through hole 4, wooden material 3 can be joined to steel structural material 2 by driving wood screw 6 into wooden material 3.

[0027] 2 and 4, the wood screw 6 is a screw that is screwed into the wooden material 3 and has a screw head 12 and a threaded portion 13 extending from the screw head 12. The screw head 12 has a flat top surface shaped like a countersunk screw, and is provided with, for example, a Phillips groove into which a screwdriver can be inserted. Note that the wood screw 6 is not limited to the above configuration, and any screw may be used as long as it has dimensions that allow it to join the steel structural material 2 and the wooden material 3 via the flat washer 5.

[0028] Thus, with the joining structure 1 for joining wooden material to steel structural material of this embodiment, even if the circular through hole 4 is larger than the screw head 12, the wooden material 3 can be joined to the steel structural material 2 without any special prior processing of the wooden material 3 or the steel structural material 2, and by using a general-purpose wood screw 6. Moreover, by positioning the flat washer 5 in an appropriate position using the positioning part 10, the wood screw 6 can be driven into the wooden material 3 at an appropriate position, so the wooden material 3 and the steel structural material 2 can be joined with appropriate strength.

[0029] To join a wooden material to a steel structural material, first, as shown in Figure 5, wooden material 3 is placed on the top surface of flange 7 of steel structural material 2. Next, flat washer 5 is temporarily fixed to the underside of flange 7 of steel structural material 2. Specifically, the position of flat washer 5 is adjusted so that positioning portion 10 of flat washer 5 is inserted into circular through-hole 4 of steel structural material 2, and adhesive layer 11 of flat washer 5 is abutted from below against the underside of flange 7 of steel structural material 2 to temporarily fix it. Since center hole 9 of flat washer 5 is formed concentrically with positioning portion 10, inserting positioning portion 10 into circular through-hole 4 positions center hole 9 of flat washer 5 in the center of circular through-hole 4.

[0030] Then, as shown in Figure 6, a wood screw 6 is threaded from below through the central hole 9 of the flat washer 5 and the circular through-hole 4 of the steel structural member 2 into the wooden member 3. In this way, the screw head 12 of the wood screw 6 pulls the flat washer 5 toward the wooden member 3, and as shown in Figure 7, the flat washer 5 and the wooden member 3 sandwich the flange 7 of the steel structural member 2, joining the wooden member 3 and the steel structural member 2.

[0031] The position where the wooden material 3 is joined is not limited to the upper flange 7 of the H-shaped steel beam as the steel structural material 2. It may also be the lower flange 7 of the H-shaped steel beam. Furthermore, it is not limited to the H-shaped steel beam, and may be a beam made of other steel materials such as channel steel or C-shaped steel.

[0032] In the structure 1 and method for joining wooden materials to steel structural materials in this embodiment, the flat washer 5 is configured so that the adhesive layer 11 is formed only outside the positioning portion 10, but this configuration is not limited to this. As shown in Fig. 8, in the structure 1 and method for joining wooden materials to steel structural materials of the first modified example, the flat washer 5 has magnetic force and is configured so that it can be attached and detached to the steel structural material 2. In other words, instead of providing the adhesive layer 11, the entire flat washer 5 is made magnetic, so that it can be temporarily fixed to the steel structural material 2.

[0033] Furthermore, in the structure 1 and method for joining wooden materials to steel structural members according to this embodiment, the flat washer 5 has a circular shape with the positioning portions 10 in contact with the inner periphery of the circular through-hole 4, but this is not limited to this configuration. In the structure 1 and method for joining wooden materials to steel structural members according to the second modified example, as shown in FIG. 9 , the positioning portions 10 may be formed to protrude from positions on the outer periphery of the flat washer 5 and on the concentric circle with the central hole 9, and at multiple positions that are in contact with the inner periphery of the circular through-hole 4. In this case, it is preferable that the positioning portions 10 are provided at three or more equally spaced locations. If the positioning portions 10 are provided at three or more locations, when these three or more positioning portions 10 are inserted into the circular through-hole 4, the three or more positioning portions 10 come into contact with the circular through-hole 4 of the steel structural member 2, thereby positioning the flat washer 5 in the appropriate position.

[0034] It goes without saying that the embodiments of the present invention are not limited to the above-described embodiments, and can be modified as appropriate without departing from the scope of the concept of the present invention.

[0035] This specification discloses the following techniques:

[0036] [Appendix 1] The structural member comprises a steel structural material having a circular through hole, a wooden material joined to the upper surface of the steel structural material, a circular annular flat washer fixed to the outer periphery of the circular through hole on the underside of the steel structural material, and a wood screw that passes through a central hole in the flat washer and the circular through hole of the steel structural material to join the wooden material from below, wherein the diameter of the head of the wood screw is shorter than the diameter of the circular through hole, the diameter of the outer periphery of the flat washer is longer than the diameter of the circular through hole, and the diameter of the central hole of the flat washer is shorter than the diameter of the head of the wood screw, and the flat washer has a positioning portion that protrudes so as to contact the inner periphery of the circular through hole.

[0037] According to the structure for joining wooden materials to steel structural materials described in Appendix 1, the wooden material is placed on the top surface of a steel structural material having a circular through-hole, a flat washer is fixed to the outer periphery of the circular through-hole on the underside of the steel structural material, and a wood screw is fastened from below through the center hole of the flat washer and the circular through-hole in the steel structural material to join the wooden material and the steel structural material. If the diameter of the head of the wood screw is smaller than the diameter of the circular through-hole, the diameter of the outer periphery of the flat washer is longer than the diameter of the circular through-hole and the diameter of the center hole of the flat washer is shorter than the diameter of the head of the wood screw, so the head of the wood screw abuts against the flat washer and is fixed. This allows the wooden material to be joined to the steel structural material without any special prior processing and using a general-purpose screw of sufficient diameter to fasten the wood screw. Furthermore, the positioning portion ensures that the flat washer is positioned appropriately relative to the circular through-hole, allowing the wood screw to be driven in the appropriate position, improving construction accuracy.

[0038] [Appendix 2] In the joining structure of wooden material to steel structural material of Appendix 1, the steel structural material is an H-shaped steel beam with flanges arranged above and below, the circular through holes are formed in the flanges in advance, and the wooden material is a square timber joined to the top surface of either the upper or lower flange along the length direction of the H-shaped steel beam.

[0039] According to the joining structure of wooden materials to steel structural materials in Appendix 2, the steel structural materials are H-shaped steel beams with flanges arranged above and below, and circular through holes are formed in the flanges in advance, and the wooden materials are square timbers that are joined to the top surface of either the upper or lower flange along the length of the H-shaped steel beam.Therefore, when using the circular through holes originally provided in the flanges of the H-shaped steel beam to fix the square timber wooden materials to the top surface of the flanges, they can be fixed with wood screws whose heads have a smaller diameter than the diameter of the circular through holes provided in the flanges, so there is no need to use wood screws with a larger diameter than necessary, and the wooden materials can be joined with sufficient strength.

[0040] [Appendix 3] In the joining structure of wooden material to steel structural material of Appendix 2, the positioning portions are formed at a plurality of positions concentric with the outer periphery and center hole of the flat washer, and at a plurality of positions tangent to the inner periphery of the circular through hole, so as to protrude toward the circular through hole.

[0041] According to the joining structure of wooden material to steel structural material in Appendix 3, the positioning portions are formed at a plurality of positions concentric with the outer periphery and center hole of the flat washer, and at a plurality of positions tangent to the inner periphery of the circular through hole, so that they protrude toward the circular through hole. Therefore, the flat washer is positioned in an appropriate position, and the head of the wood screw is driven into the wooden material at an appropriate position, so that the wooden material and steel structural material can be joined with appropriate strength.

[0042] [Appendix 4] In the joining structure of wooden material to steel structural material of Appendix 2, the positioning portion is formed in a circular shape that is concentric with the outer circle and center hole of the flat washer and is in contact with the inner circumference of the circular through hole, and the positioning portion is formed to protrude toward the circular through hole.

[0043] According to the joining structure of wooden material to steel structural material in Appendix 4, the positioning portion is formed in a circle that is concentric with the outer circle and center hole of the flat washer and is in contact with the inner circumference of the circular through-hole, so that the flat washer can be positioned easily and reliably, and by placing the flat washer in the appropriate position and driving the wood screw in appropriately, the wooden material and steel structural material can be joined with appropriate strength.

[0044] [Appendix 5] In the joining structure of wooden material to steel structural material of Appendix 4, an adhesive layer is formed only outside the positioning portion of the flat washer, and the positioning portion protrudes toward the steel structural material beyond the adhesive layer.

[0045] According to the joining structure of wooden material to steel structural material in Appendix 5, the adhesive layer is formed only outside the positioning portion of the flat washer, and the positioning portion protrudes further toward the steel structural material than the adhesive layer. Therefore, when the flat washer is not positioned in the appropriate position, the positioning portion acts as a spacer and the adhesive layer does not come into contact with the steel structural material. When the positioning portion is inserted into the circular through-hole, the adhesive layer comes into contact with the steel structural material and can be temporarily fixed. Therefore, the flat washer can be positioned in the appropriate position, and temporary fixing can also improve workability.

[0046] [Appendix 6] In the structure for joining wooden material to steel structural material of Appendix 2, the flat washer has magnetic force and is detachable from the steel structural material.

[0047] According to the joining structure of wooden material to steel structural material in Appendix 6, the flat washer has magnetic force and is detachable from the steel structural material, so the flat washer can be easily temporarily fixed in the appropriate position on the steel structural material.

[0048] [Appendix 7] A method for joining wooden material to steel structural material to form a joining structure of wooden material to steel structural material according to Appendix 5 or Appendix 6, comprising the steps of: placing the wooden material on the upper surface of the steel structural material; temporarily fastening the flat washer to the lower surface of the steel structural material; and joining the wood screw to the wooden material from below through the central hole of the flat washer and the circular through-hole of the steel structural material.

[0049] According to the method of joining wooden materials to steel structural materials in Appendix 7, a flat washer is temporarily attached to the underside of the steel structural material, and then a wood screw is driven into the wooden material from below through the center hole of the flat washer and the circular through-hole in the steel structural material, making construction easier and allowing the wood screw to be driven into the appropriate position. [Industrial Applicability]

[0050] The structure and method for joining wooden materials to steel structural materials according to the present invention are suitable as a structure and method for joining wooden substrates to the steel structural frame of a building. [Explanation of symbols]

[0051] 1... Joint structure of wooden material to steel structural material, 2... Steel structural material, 3... Wooden material, 4... Circular through hole, 5... Flat washer, 6... Wood screw, 7... Flange, 9... Center hole, 10... Positioning part, 11... Adhesive layer, 12... Screw head

Claims

1. a steel structural member having a circular through hole; a wooden material joined to the upper surface of the steel structural material; a circular annular flat washer fixed to the outer periphery of the circular through hole on the lower surface of the steel structural material; a wood screw that passes through the central hole of the flat washer and the circular through-hole of the steel structural material and joins the wooden material from below; Equipped with The diameter of the head of the wood screw is smaller than the diameter of the circular through hole, The diameter of the outer periphery of the flat washer is longer than the diameter of the circular through hole, The diameter of the center hole of the flat washer is smaller than the diameter of the head of the wood screw, The flat washer has a positioning portion formed thereon that protrudes so as to contact the inner periphery of the circular through hole, The steel structural member is an H-shaped steel beam with flanges arranged above and below, The circular through hole is formed in the flange in advance, The wooden material is a square timber joined to the upper surface of either the upper or lower flange along the length direction of the H-shaped steel beam, the positioning portion is formed in a circular shape that is concentric with the outer circumferential circle and the center hole of the flat washer and that is in contact with the inner periphery of the circular through hole, and the positioning portion is formed to protrude toward the circular through hole, an adhesive layer is formed only on the outer side of the positioning portion of the flat washer; The positioning portion protrudes toward the steel structural material beyond the adhesive layer. Joining structure of wooden materials to steel structural members.

2. a steel structural member having a circular through hole; a wooden material joined to the upper surface of the steel structural material; a circular annular flat washer fixed to the outer periphery of the circular through hole on the lower surface of the steel structural material; a wood screw that passes through the central hole of the flat washer and the circular through-hole of the steel structural material and joins the wooden material from below; Equipped with The diameter of the head of the wood screw is smaller than the diameter of the circular through hole, The diameter of the outer periphery of the flat washer is longer than the diameter of the circular through hole, The diameter of the center hole of the flat washer is smaller than the diameter of the head of the wood screw, The flat washer has a positioning portion formed thereon that protrudes so as to contact the inner periphery of the circular through hole, The steel structural member is an H-shaped steel beam with flanges arranged above and below, The circular through hole is formed in the flange in advance, The wooden material is a square timber joined to the upper surface of either the upper or lower flange along the length direction of the H-shaped steel beam, The flat washer has magnetic force and is detachable from the steel structural member. Joining structure of wooden materials to steel structural members.

3. The positioning portions are formed at a plurality of positions concentric with the outer periphery and the center hole of the flat washer and at a plurality of positions tangent to the inner periphery of the circular through hole, the positioning portions protruding toward the circular through hole. The joining structure of wooden material to steel structural material according to claim 2.

4. The positioning portion is formed in a circular shape that is concentric with the outer circumferential circle and the center hole of the flat washer and is in contact with the inner periphery of the circular through hole, and the positioning portion is formed to protrude toward the circular through hole. The joining structure of wooden material to steel structural material according to claim 2.

5. A method for joining wooden materials to steel structural materials, forming a joining structure of wooden materials to steel structural materials according to any one of claims 1 to 4, comprising: placing the wooden material on top of the steel structural material; a step of temporarily fastening the flat washer to the underside of the steel structural material; a step of inserting the wood screw from below through the central hole of the flat washer and the circular through-hole of the steel structural material to join it to the wooden material; A method for joining wooden materials to steel structural materials.

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