Column-beam joint structure

Abstract

To improve construction rationality in column-beam joint structures at joints between column heads of wooden columns and wooden beams.SOLUTION: A column-beam joint structure comprises a wooden column with a groove formed on its upper surface, a wooden beam inserted into the groove of the wooden column, and a cap member attached to the upper surface of the wooden column to inhibit the wood beam from being pulled out of the groove.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The technology disclosed in this specification relates to a column-beam joint structure between a wooden column and a wooden beam. [Background technology]

[0002] Various structures are known as column-beam joint structures between wooden columns and wooden beams (hereinafter collectively referred to as "wooden materials"). For example, a column-beam joint structure is known in which a wooden beam is inserted into a through-hole formed in a wooden column and joined to the wooden column (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-7436 A Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional column-beam joint structures, the joint between the head of the wooden column and the wooden beam requires processing to form a through hole in the wooden column, which is time-consuming to construct. Thus, there is room for improvement in the rationality of construction in conventional column-beam joint structures.

[0005] This specification discloses a technique that can solve at least a part of the above-mentioned problems. [Means for solving the problem]

[0006] The technology disclosed in this specification can be realized, for example, in the following forms.

[0007] (1) The column-beam joint structure disclosed in this specification comprises a wooden column having a groove formed on an upper surface thereof, a wooden beam inserted into the groove of the wooden column, and a cap member attached to the upper surface of the wooden column so as to prevent the wooden beam from slipping out of the groove.

[0008] According to this column-beam joint structure, a through-joint between the head of the wooden column and the wooden beam can be realized by forming a groove that is easier to process without forming a through hole in the wooden column and adopting a cap member that prevents the wooden beam from slipping out of the groove. As a result, the rationality of the construction of the column-beam joint structure can be improved.

[0009] (2) In the above-mentioned beam-column joint structure, the cap member may have a first fixing part fixed to the upper surface of the wooden column, a second fixing part facing the first fixing part across the groove and fixed to the upper surface of the wooden column, and a beam facing part connecting the first fixing part and the second fixing part and facing the wooden beam in the up-down direction. With this configuration, the cap member can be firmly attached to the upper surface of the wooden column, and the occurrence of the cap member coming off can be suppressed.

[0010] (3) The column-beam joint structure may further include a fixing member for fixing the beam-facing portion of the cap member to the upper surface of the wooden beam. With this configuration, it is possible to suppress the relative movement of the wooden beam with respect to the wooden column.

[0011] (4) In the above-mentioned column-beam joint structure, a plurality of the cap members may be arranged in the longitudinal direction of the wooden beam. With this configuration, it is possible to more reliably prevent the wooden beam from slipping out of the groove of the wooden column.

[0012] The technology disclosed in this specification can be realized in various forms, for example, in the form of a column-beam joint structure, a building having such a column-beam joint structure, a manufacturing method or construction method thereof, etc. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is an explanatory diagram showing the configuration of a building 100 according to an embodiment of the present invention. [Diagram 2] FIG. 1 is an explanatory diagram showing the external configuration of a joint 119 between a column capital 19 of a wooden column 10 and a wooden beam 20. [Diagram 3] FIG. 1 is an explanatory diagram showing a cross-sectional configuration of a joint 119. [Figure 4] FIG. 4 is an explanatory diagram showing a cross-sectional configuration of a joint 119 taken along the line IV-IV in FIG. 3; [Diagram 5] FIG. 4 is an explanatory diagram showing a cross-sectional configuration of a joint 119 at the position VV in FIG. 3. [Figure 6] FIG. 6 is an explanatory diagram showing a cross-sectional configuration of a joint 119 taken along the line VI-VI in FIG. 3; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] A. Embodiment: Fig. 1 is an explanatory diagram showing the configuration of a building 100 in this embodiment. Fig. 1 shows the external configuration of a part of the building 100. In the following description, the Z-axis direction in the figure is also referred to as the "up-down direction" or "height direction," the positive Z-axis direction is also referred to as the "upward direction," and the negative Z-axis direction is also referred to as the "downward direction."

[0015] The building 100 of this embodiment is a stage-like building with a floor surface 101 constructed at an elevated position. The building 100 includes a foundation 90, wooden columns 10, wooden beams 20, joists 102, and floor materials 103.

[0016] The foundation 90 constitutes the lowest part of the building 100 and is a structure that transmits the load from above to the ground. The foundation 90 is made of, for example, reinforced concrete. The foundation 90 may be a spread foundation or a pile foundation.

[0017] The wooden column 10 is a vertical member for transmitting the load of a floor structure or the like to the foundation 90. The wooden column 10 is made of wood. In this embodiment, the wooden column 10 is made of symmetrical different grade laminated lumber (e.g., Scots pine E95-F270 or Japanese cypress E95-F270, etc.). The cross section of the wooden column 10 is, for example, approximately rectangular, 420 mm x 420 mm.

[0018] The wooden beam 20 is a horizontal member that connects to the wooden columns 10 and supports the load of a floor structure and the like. The wooden beam 20 is made of wood. In this embodiment, the wooden beam 20 is made of symmetrical different grade laminated lumber (e.g., cedar E65-F225 or Scotch pine E105-F300, etc.). The cross section of the wooden beam 20 is, for example, approximately rectangular, 210 mm×420 mm to 210 mm×780 mm. Hereinafter, the wooden columns 10 and the wooden beam 20 are also collectively referred to as wooden members 10, 20.

[0019] The flooring 103 is a plate-like member that constitutes a floor structure. The flooring 103 is made of wood. In this embodiment, the flooring 103 is made of Cross Laminated Timber (CLT) (for example, S90-3-3 cypress, S90-5-5 cypress, or Mx90-3-3 exterior: cypress, interior: cedar, etc.). The thickness of the flooring 103 is, for example, about 90 mm to 150 mm. A material other than wood (for example, a membrane material) may be used as at least a part of the flooring 103.

[0020] The joists 102 are horizontal members that support the floor materials 103 that make up the floor structure. The joists 102 are made of wood. In this embodiment, the joists 102 are made of symmetrical different grade laminated lumber (e.g., Scots pine E105-F300, etc.). The cross section of the joists 102 is, for example, approximately rectangular, measuring 120 mm×270 mm to 120 mm×330 mm. The arrangement pitch of the joists 102 is, for example, about 1800 mm.

[0021] The building 100 of this embodiment is a building having a wooden rigid frame structure composed of wooden columns 10 and wooden beams 20. Therefore, each joint between the wooden columns 10 and the wooden beams 20 is a moment-resisting joint having rotational rigidity. Hereinafter, among the joints between the wooden columns 10 and the wooden beams 20, a column-beam joint structure 119A of each joint 119 between the column capital part 19 of the wooden column 10 and the wooden beams 20 will be described.

[0022] Figure 2 is an explanatory diagram showing the external configuration of joint 119 between the column capital part 19 of wooden column 10 and wooden beam 20, Figure 3 is an explanatory diagram showing the cross-sectional configuration of joint 119, Figure 4 is an explanatory diagram showing the cross-sectional configuration of joint 119 at position IV-IV in Figure 3, Figure 5 is an explanatory diagram showing the cross-sectional configuration of joint 119 at position VV in Figure 3, and Figure 6 is an explanatory diagram showing the cross-sectional configuration of joint 119 at position VI-VI in Figure 3.

[0023] In this embodiment, a groove 18 is formed in the upper surface 17 of the wooden column 10 at a joint 119 between the column capital portion 19 of the wooden column 10 and the wooden beam 20. The wooden beam 20 is joined to the wooden column 10 in a state where it is inserted over the entire groove 18 formed in the wooden column 10. In other words, the joint 119 is a so-called through joint.

[0024] The groove 18 formed in the wooden column 10 extends parallel to the longitudinal direction (X-axis direction) of the wooden beam 20. The cross section of the groove 18 has a shape that matches the cross section of the wooden beam 20. In this embodiment, since the cross section of the wooden beam 20 is approximately rectangular, the cross section of the groove 18 is also approximately rectangular that matches the cross section of the wooden beam 20.

[0025] The wooden beam 20 is inserted into a groove 18 formed in the wooden column 10. A sinking prevention plate 30 is disposed on the underside of the portion of the wooden beam 20 inserted into the groove 18. The sinking prevention plate 30 is, for example, a flat steel piece having a thickness of 19 mm.

[0026] The joint 119 between the column capital part 19 of the wooden column 10 and the wooden beam 20 further includes a cap member 70. The cap member 70 is attached to the upper surface 17 of the wooden column 10 so as to prevent the wooden beam 20 from slipping out of the groove 18. In this embodiment, two cap members 70 aligned in the longitudinal direction (X-axis direction) of the wooden beam 20 are provided for one wooden column 10. The cap member 70 is formed, for example, from a steel material, and more specifically, is formed, for example, from a channel steel (C-150×75×9×12.5, etc.).

[0027] The cap member 70 is a rod-shaped member extending in the width direction (Y-axis direction) of the wooden beam 20. The cap member 70 has a first fixing portion 71, a second fixing portion 72, and a beam facing portion 73. The first fixing portion 71 and the second fixing portion 72 face each other across the groove 18. The first fixing portion 71 and the second fixing portion 72 are fixed to the upper surface 17 of the wooden column 10. The first fixing portion 71 and the second fixing portion 72 are fixed, for example, by fastening an anchor member 74 (e.g., deformed bar D25) embedded and fixed in the wooden column 10, a nut 75, and a square washer 79. The anchor member 74 is fixed to the wooden column 10 by, for example, a GIR (Glued-in Rod) construction method using epoxy resin adhesive injection.

[0028] The beam-facing portion 73 of the cap member 70 connects the first fixing portion 71 and the second fixing portion 72, and faces the wooden beam 20 in the vertical direction. The interference between the beam-facing portion 73 of the cap member 70 and the wooden beam 20 prevents the wooden beam 20 from coming out of the groove 18.

[0029] In this embodiment, the beam facing portion 73 of the cap member 70 and the sinking prevention plate 30 are connected to each other by, for example, a lag screw bolt 76 (e.g., φ35). The beam facing portion 73 of the cap member 70 and the upper surface 21 of the wooden beam 20 are fixed by a beam lateral displacement prevention screw 77. At least one of the lag screw bolt 76 and the beam lateral displacement prevention screw 77 is an example of a fixing member.

[0030] As described above, the column-beam joint structure 119A of the joint 119 between the wooden column 10 and the wooden beam 20 in the building 100 of this embodiment includes the wooden column 10, the wooden beam 20, and the cap member 70. The groove 18 is formed on the upper surface 17 of the wooden column 10. The wooden beam 20 is inserted into the groove 18 of the wooden column 10. The cap member 70 is attached to the upper surface 17 of the wooden column 10 so as to prevent the wooden beam 20 from slipping out of the groove 18 of the wooden column 10. Therefore, according to the column-beam joint structure 119A of this embodiment, a groove 18 that is easier to process is formed without forming a through hole in the wooden column 10, and by adopting the cap member 70 that prevents the wooden beam 20 from slipping out of the groove 18, a through joint between the wooden column 10 and the wooden beam 20 can be realized. As a result, the rationality of the construction of the column-beam joint structure 119A can be improved.

[0031] In addition, in the column-beam joint structure 119A of this embodiment, the cap member 70 has a first fixing portion 71, a second fixing portion 72, and a beam facing portion 73. The first fixing portion 71 is fixed to the upper surface 17 of the wooden column 10. The second fixing portion 72 faces the first fixing portion 71 across the groove 18 and is fixed to the upper surface 17 of the wooden column 10. The beam facing portion 73 connects the first fixing portion 71 and the second fixing portion 72, and faces the wooden beam 20 in the up-down direction. Therefore, according to the column-beam joint structure 119A of this embodiment, the cap member 70 can be firmly attached to the upper surface 17 of the wooden column 10, and the occurrence of the cap member 70 coming off can be suppressed.

[0032] Moreover, the column-beam joint structure 119A of this embodiment further includes a lag screw bolt 76 and a beam lateral displacement prevention screw 77 as fixing members for fixing the beam-facing portion 73 of the cap member 70 to the upper surface 21 of the wooden beam 20. Therefore, according to the column-beam joint structure 119A of this embodiment, the relative movement of the wooden beam 20 with respect to the wooden column 10 can be suppressed.

[0033] Moreover, the column-beam joint structure 119A of this embodiment includes a plurality of cap members 70 arranged in the longitudinal direction of the wooden beam 20. Therefore, according to the column-beam joint structure 119A of this embodiment, it is possible to more reliably prevent the wooden beam 20 from slipping out of the groove 18 of the wooden column 10.

[0034] B. Variations: The technology disclosed in this specification is not limited to the above-described embodiments, and can be modified in various forms without departing from the spirit of the invention. For example, the following modifications are also possible.

[0035] The configurations of the building 100 and the beam-column joint structure 119A in the above embodiment are merely examples and can be modified in various ways. For example, in the above embodiment, the number, shape, arrangement, etc. of the cap members 70 of the beam-column joint structure 119A can be modified in various ways.

[0036] In the above embodiment, the lag screw bolt 76 and the beam-facing screw 77 are used to fix the beam-facing portion 73 of the cap member 70 to the upper surface 21 of the wooden beam 20, but at least one of these may be omitted. [Explanation of symbols]

[0037] 10: Wooden column 17: Top surface 18: Groove 19: Column head 20: Wooden beam 21: Top surface 30: Anti-sinking plate 70: Cap member 71: First fixing part 72: Second fixing part 73: Beam facing part 74: Anchor member 75: Nut 76: Lag screw bolt 77: Screw for preventing beam from shifting sideways 79: Square washer 90: Foundation 100: Building 101: Floor surface 102: Joist material 103: Floor material 119: Joint 119A: Column-beam joint structure

Claims

1. A column-beam joint structure, A wooden pillar having a groove formed on the upper surface; A wooden beam inserted into the groove of the wooden column; A cap member attached to the upper surface of the wooden column to prevent the wooden beam from slipping out of the groove; A column-beam joint structure.

2. The column-beam joint structure according to claim 1, The cap member is A first fixing part fixed to the upper surface of the wooden pole; A second fixing portion opposed to the first fixing portion across the groove and fixed to the upper surface of the wooden pole; A beam facing portion that connects the first fixing portion and the second fixing portion and faces the wooden beam in the vertical direction; A column-beam joint structure having the above structure.

3. The column-beam joint structure according to claim 2, further comprising: A column-beam joint structure comprising a fixing member that fixes the beam-facing portion of the cap member to the upper surface of the wooden beam.

4. The column-beam joint structure according to any one of claims 1 to 3, A column-beam joint structure comprising a plurality of the cap members arranged in the longitudinal direction of the wooden beam.

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