Joint structure of wooden beam

Abstract

To provide a joint structure of wooden beams easily avoiding mutual interference of connectors.SOLUTION: A joint structure of wooden beams comprises: a plurality of wooden beams (beams 30); steel columns (columns 20) which are provided at intersections of the plurality of wooden beams and whose lateral surface faces the end face of each wooden beam; and connectors 70 for joining the wooden beam with the steel column, which are embedded in the inside of the wooden beams and whose one end is fixed to the steel column.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a joint structure for a wooden beam. [Background technology]

[0002] Patent Document 1 below shows a joint structure between a first wooden structural member extending along a first axis and a second wooden structural member extending along a second axis. In this joint structure, a precast concrete structural member is disposed between the first wooden structural member and the second wooden structural member. Furthermore, first rods are embedded between the first wooden structural member on both sides of the precast concrete structural member, and similarly, second rods are embedded between the second wooden structural members on both sides of the precast concrete structural member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-62837 Summary of the Invention [Problem to be solved by the invention]

[0004] As shown in the above-mentioned Patent Document 1, when connectors such as rods are arranged across opposing wooden structural members, it is necessary to avoid interference between the intersecting connectors. Therefore, the cross-sectional dimensions of the wooden structural members and the PC structural members must be large enough to allow the intersecting connectors to be arranged overlapping each other. In such cases, the cross-sectional dimensions of the members may become excessively large. Furthermore, if the wooden structural members are not arranged in a straight line, it is difficult to arrange the connectors.

[0005] SUMMARY OF THE INVENTION In consideration of the above, an object of the present invention is to provide a joining structure for wooden beams that can easily avoid interference between connectors. [Means for solving the problem]

[0006] The wooden beam joint structure of claim 1 comprises a plurality of wooden beams, a steel column arranged at the intersection of the plurality of wooden beams and having a side surface facing the end face of each of the wooden beams, and connectors that are embedded inside the wooden beams and have one end fixed to the steel column, joining the wooden beams and the steel column.

[0007] In the wooden beam joint structure of claim 1, connectors are fixed to the steel columns, and the connectors join each wooden beam to the steel column.

[0008] This eliminates the need to place long connectors that penetrate the steel column between opposing beams, preventing interference between the connectors. Even if the opposing beams are not aligned in a straight line, the connectors can be placed along the axial direction of each beam, making it easier to ensure the strength of the connection between the wooden beam and the steel column.

[0009] In addition, because each connector is fixed to the steel column, installation is easier than when the connectors are separate. Furthermore, because the joint where the wooden beam is joined is integrated with the steel column, installation is easier than when the joint and the steel column are formed separately.

[0010] The wooden beam joint structure of claim 2 is the wooden beam joint structure of claim 1, wherein the connector is a hollow tube having an injection hole and a discharge hole, and the wooden beam has an insertion hole into which the connector is inserted, and grout material injected from the injection hole into the inside of the connector is discharged from the discharge hole and filled between the outer periphery of the connector and the inner wall of the insertion hole.

[0011] In the wooden beam joint structure of claim 2, the grout material injected into the connector fills the gap between the outer periphery of the connector and the inner periphery of the insertion hole, which suppresses rattle of the wooden beam relative to the connector and makes it easier to ensure the joint strength between the wooden beam and the steel column. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a joining structure for wooden beams that easily prevents interference between connectors. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a perspective view showing an example of a frame to which a wooden beam joint structure according to an embodiment of the present invention is applied. [Figure 2] FIG. 1A is a cross-sectional elevation view showing an example of a joint structure between a wooden beam and a wall body according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line BB in FIG. [Figure 3] FIG. 1A is a plan cross-sectional view showing an example of a joint structure between a wooden beam and a steel column according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line BB in FIG. [Figure 4] 1 is a perspective view showing an example of a method for installing a connector according to an embodiment of the present invention. [Figure 5] FIG. 10 is a cross-sectional plan view showing a modified example in which the core is omitted in the joint structure of a wooden beam according to an embodiment of the present invention. [Figure 6] FIG. 10 is a perspective view showing an example of a method for installing a connector in a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, a wooden beam joint structure according to an embodiment of the present invention will be described with reference to the drawings. Components indicated by the same reference numerals in each drawing are the same components. However, unless otherwise specified in the specification, each component is not limited to one, and may be present in multiple numbers.

[0015] Furthermore, descriptions of overlapping configurations and symbols in each drawing may be omitted. Note that the present disclosure is not limited to the following embodiments, and may be implemented by making appropriate modifications, such as omitting configurations, replacing them with different configurations, or combining one embodiment with various modified examples, within the scope of the purpose of the present disclosure.

[0016] <Frame> 1 shows a frame 10 to which a wooden beam joint structure according to an embodiment of the present invention is applied. The frame 10 is a column-beam frame formed of columns 20 and beams 30.

[0017] The columns 20 are round columns made of steel. As will be described in detail later, a core 40 that covers the columns 20 is joined to the upper end of at least some of the columns 20. The lower end of the columns 20 is fixed to the foundation 60. The beams 30 are wooden beams that span between the columns 20.

[0018] As shown in Figures 3(A) and (B), the ends of at least some of the beams 30 are joined to the columns 20 covered by the cores 40. Specifically, the ends of the beams 30 that span the columns 20 covered by the cores 40 are arranged in contact with the cores 40. The beams 30 are joined to the columns 20 by connectors 70. The cores 40 are wooden decorative materials. As will be described in more detail later, multiple beams 30 are arranged in contact with one core 40.

[0019] The beam 30 is formed using, for example, laminated cedar lumber, and the core 40 is formed using laminated larch lumber. This allows the strength of the core 40 (e.g., compressive strength, bending strength, shear strength) to be greater than the strength of the beam 30. However, as mentioned above, the core 40 is a decorative material, and its strength may be less than the strength of the beam 30.

[0020] A portion of the beam 30 is supported by a wall 50. The wall 50 is a bearing wall made of reinforced concrete, and its lower end is fixed to a foundation 60. Note that, in the present invention, the wall 50 is not necessarily required.

[0021] (Beam and wall joint structure) As shown in FIGS. 2A and 2B, some of the beams 30 are placed on a wall 50 and fixed to the wall 50 by connecting members 52, drift pins 54, and tension bolts 56.

[0022] The wall body 50 is disposed so that its in-plane direction is along the axial direction of the beam 30, and is disposed directly below the beam 30. A joining member 52 is fixed to the upper end of the wall body 50.

[0023] The joining member 52 includes a base plate 52A, a stud 52B, and a joining plate 52C.

[0024] Base plate 52A is a steel plate arranged along the upper end surface of wall body 50, and is arranged so that its upper surface is flush with the upper surface of wall body 50. Studs 52B are welded to the underside of base plate 52A, protrude downward, and are embedded in wall body 50. Joining plate 52C is a steel plate whose in-plane direction is vertical and aligned with the axial direction of beam 30, and has through holes H1 formed therein.

[0025] 2(B), an insertion hole into which the joining plate 52C is inserted is formed in the beam 30. An insertion hole H2 communicating with the through hole H1 of the joining plate 52C is also formed in the beam 30. A drift pin 54 is inserted into the insertion hole H2 and the through hole H1.

[0026] The lower end of a tension bolt 56 is embedded in the wall 50. The tension bolt 56 protrudes upward from the upper end surface of the wall 50, is inserted into a through-hole that passes through the beam 30 in the vertical direction, and is fixed to the wall 50 with a nut.

[0027] (Beam-column joint structure) 3(A) and (B), the column 20 is disposed at the intersection of multiple beams 30, with its side surfaces facing the end faces of each beam 30 across the core 40. Specifically, the column capital of the column 20 is covered by the core 40, and the end faces of multiple beams 30 are disposed in contact with the outer peripheral surface of this core 40.

[0028] The beams 30 are arranged radially relative to the core 40. The columns 20 covered by the core 40 and the beams 30 are joined using connectors 70 and grout material. As will be described in detail later, the grout material is filled into the connectors 70 from the direction indicated by the arrow in Figure 3(B).

[0029] An insertion hole 30A into which the connector 70 is inserted is formed in the end face of the beam 30. The insertion hole 30A is a bottomed hole that extends along the axial direction of the beam 30.

[0030] Furthermore, an insertion hole 40A through which the connector 70 is inserted is formed on the side surface of the core 40. The insertion hole 40A is a through hole that penetrates the side surface of the core 40 and the inner peripheral surface that contacts the column 20. The insertion hole 30A and the insertion hole 40A communicate with each other and are arranged in a straight line.

[0031] One end of the connector 70 is welded to the column 20. By covering the column 20 to which the connector 70 is welded with the core 40, the column 20 is formed with the connector 70 protruding from the outside of the core 40 covering the column capital.

[0032] The connectors 70 are inserted into the insertion holes 30A and are thereby embedded inside the beams 30. The connectors 70 are provided for each beam 30.

[0033] (Connector and insertion hole structure) As shown in Figure 4, connector 70 is a hollow tubular body that includes a main pipe 72 and a branch pipe 74. Main pipe 72 is a cylindrical body with an opening 72H formed at one end. Opening 72H is formed at the end of main pipe 72 that is inserted into insertion hole 30A. The other end of main pipe 72 is welded to column 20. Branch pipe 74 is a cylindrical body with one end connected to main pipe 72 and the other end with opening 74H formed therein.

[0034] A through hole 40B in which the branch pipe 74 is disposed is formed in the core 40. The through hole 40B passes through the core 40 between the upper end surface or the lower end surface and the insertion hole 40A.

[0035] When the connector 70 is positioned from the pillar 20 through the insertion hole 40A to the insertion hole 30A, a gap V is formed between the outer periphery of the connector 70 and the inner peripheral wall of the insertion hole 30A, the insertion hole 40A, and the inner peripheral wall of the through hole 40B.

[0036] Then, the tip of a grout filling jig is inserted into the opening 74H of the branch pipe 74, and the grout material is injected from the opening 74H into the inside of the connector 70, so that the grout material flows toward the opening 72H.

[0037] The grout then flows from the opening 72H toward the gap V and finally overflows from the through-hole 40B. The worker visually checks the overflowing grout and completes the grout injection work. This joins the beam 30 and the column 20 with the connector 70 and the grout. The main pipe 72 and the branch pipe 74 can be configured to be detachable, so that the branch pipe 74 can be inserted through the through-hole 40B and joined to the main pipe 72.

[0038] (Beam joint angle) In the frame 10, the angle at which the beams 30 are joined to the columns 20 is not particularly limited, but in the example shown in Figure 3(A), none of the multiple beams 30 joined to the core 40 are arranged on the same line.

[0039] <Action and effect> In the wooden beam joint structure according to the embodiment of the present invention, as shown in Figures 3(A) and 3(B), the end of the wooden beam 30 is arranged in contact with the wooden core 40. The connector 70 that joins the beam 30 to the column 20 is embedded from the column 20 through the inside of the core 40 and into the beam 30. As a result, from the outside, only the wooden parts are exposed at the joint between the beam 30 and the column 20, excluding the column 20.

[0040] In addition, in the wooden beam joining structure according to the embodiment of the present invention, as shown in Figures 3(A) and 3(B), connectors 70 are fixed to steel columns 20. The connectors 70 join each beam 30 and column 20 together.

[0041] Therefore, there is no need to arrange a long connector that penetrates the column 20 between opposing beams 30, and interference between the connectors 70 can be avoided. Furthermore, even if the opposing beams 30 are not arranged in a straight line, the connectors 70 can be arranged along the axial direction of each beam 30, making it easy to ensure the joint strength between the beams 30 and the column 20.

[0042] In addition, because each connector 70 is fixed to the column 20, construction is easier than when the connectors 70 are separate. Furthermore, because the joint where the beam 30 is joined is integrated with the column 20, construction is easier than when the joint and the column 20 are formed separately.

[0043] Furthermore, in the wooden beam joint structure according to the embodiment of the present invention, the column 20 is a round column made of steel, and there is no anisotropy in the strength of the column 20. Therefore, in the column 20 where bending stress is concentrated from multiple beams 30, it is possible to deal with the bending stress concentration.

[0044] Furthermore, in the wooden beam joint structure according to the embodiment of the present invention, the grout material injected into the connector 70 is filled between the outer periphery of the connector 70 and the inner periphery of the insertion hole 30A and the insertion hole 40A. This suppresses rattle of the beam 30 relative to the connector 70, and makes it easier to ensure the joint strength between the beam 30 and the column 20.

[0045] <Other embodiments> In the above embodiment, the pillar 20 is covered with the core 40 as a decorative material, but the embodiment of the present invention is not limited to this. For example, as shown in Fig. 5, the core 40 may be omitted.

[0046] In this case, the end faces of the beams 30 are machined to have a concave curved surface that conforms to the outer peripheral surface of the column 20. Also, the ends of the beams 30 are machined to have a tapered shape so that adjacent beams 30 do not interfere with each other. Furthermore, as shown in FIG. 6, a through hole 30B is formed in the beam 30, which passes through the insertion hole 30A and into which the branch pipe 74 is disposed. By forming the beam 30 in this manner, no decorative material is required, and the number of parts can be reduced. The through hole 30B can be opened on the upper end face, lower end face, or side face of the beam 30.

[0047] In the above embodiment, an example has been described in which the multiple beams 30 joined to the column 20 are not arranged on the same straight line, but the embodiment of the present invention is not limited to this. In the present invention, multiple beams 30 may be arranged on a straight line.

[0048] In addition, in the above embodiment, the core 40 and the beams 30 are formed using laminated timber, but the present invention is not limited to this. The material from which the core 40 and the beams 30 are formed is not particularly limited as long as it is a wood material.

[0049] In each of these embodiments, interference between the connectors 70 can be suppressed by providing a connector 70 for each beam 30. As described above, the present invention can be embodied in various embodiments. [Explanation of symbols]

[0050] 20 pillars (steel pillars) 30 beam (wooden pillar) 30A insertion hole 70 Connector 72 Injection hole 74 Discharge hole

Claims

1. Several wooden beams and a steel column disposed at an intersection of the plurality of wooden beams, the side surface of which faces the end surface of each of the wooden beams; a connector for connecting the wooden beam and the steel column, the connector being embedded in each of the wooden beams and having one end fixed to the steel column; Equipped with Jointed structure of wooden beams.

2. The connector comprises: A hollow tube having a discharge hole and an injection hole, The wooden beam is formed with an insertion hole into which the connector is inserted, The grout material injected into the connector from the injection hole is discharged from the discharge hole and filled between the outer periphery of the connector and the inner periphery of the insertion hole. The wooden beam joint structure according to claim 1.

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