Column-beam joint structure

Abstract

To realize easier construction of joints.SOLUTION: A column-beam joint structure comprises a wooden column with a through hole, a wooden beam inserted into the through hole, and a wedge member inserted into a gap between the wooden beam and the inner peripheral surface of the through hole. The inner peripheral surface of the through hole has a tapered surface that slopes so that the gap narrows from the opening position of the through hole toward the deeper side.SELECTED DRAWING: Figure 3

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 beam-column joint structures, the gap between the wooden beam and the inner surface of the hole in the wooden column must be filled using two components: a wedge member and an angle washer, and there is room for improvement in terms of making construction easier.

[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) A column-beam joint structure disclosed in this specification includes a wooden column having a through hole formed therein, a wooden beam inserted into the through hole, and a wedge member inserted into a gap between the wooden beam and an inner peripheral surface of the through hole. The inner peripheral surface of the through hole has a tapered surface that is inclined from the opening position of the through hole toward the back side so that the gap narrows.

[0008] According to this column-beam joint structure, the gap can be filled using a wedge member without using an angle washer, thereby firmly fixing the wooden beam to the wooden column, thereby facilitating the construction of the joint.

[0009] (2) In the above-mentioned beam-column joint structure, the inner peripheral surface of the through-hole may have a first tapered surface that slopes from one opening position of the through-hole toward the rear side, and a second tapered surface that slopes from the other opening position of the through-hole toward the rear side, and the beam-column joint structure may include a first wedge member that abuts against the first tapered surface, and a second wedge member that abuts against the second tapered surface. With this configuration, the wooden beam can be more firmly fixed to the wooden column by using a pair of wedge members.

[0010] (3) In the above-mentioned beam-column joint structure, the inner peripheral surface of the through hole may be an upper inner peripheral surface. With this configuration, a wedge member can be used to fill the gap between the wooden beam and the upper inner peripheral surface of the through hole, making it possible to further facilitate construction of the joint.

[0011] 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]

[0012] [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 110 between 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 110. [Figure 4] FIG. 4 is an explanatory diagram showing a cross-sectional configuration of a joint 110 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 110 at a position VV in FIG. [Figure 6] FIG. 13 is an explanatory diagram showing the planar configuration of the sinking prevention plate 30. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] 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."

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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 110 between the wooden columns 10 and the wooden beams 20 is a moment-resisting joint having rotational rigidity. Below, the column-beam joint structure 110A of each joint 110 will be described.

[0021] Figure 2 is an explanatory diagram showing the external configuration of the joint 110 between the wooden column 10 and the wooden beam 20, Figure 3 is an explanatory diagram showing the cross-sectional configuration of the joint 110, Figure 4 is an explanatory diagram showing the cross-sectional configuration of the joint 110 at the position IV-IV in Figure 3, and Figure 5 is an explanatory diagram showing the cross-sectional configuration of the joint 110 at the position VV in Figure 3.

[0022] In this embodiment, at a joint 110 between the wooden column 10 and the wooden beam 20, a through hole 11 that penetrates horizontally is formed in the wooden column 10. The wooden beam 20 is joined to the wooden column 10 in a state where it is inserted into the through hole 11 formed in the wooden column 10. In other words, the joint 110 is a so-called through joint.

[0023] A sinking prevention plate 30 is disposed on the upper and lower surfaces of the portion of the wooden beam 20 inserted into the through hole 11. FIG. 6 is an explanatory diagram showing the planar configuration of the sinking prevention plate 30. The sinking prevention plate 30 is, for example, flat steel having a thickness of 19 mm. Six course thread holes 16 are formed in the sinking prevention plate 30. The upper and lower pair of sinking prevention plates 30 are connected to each other, for example, by lag screw bolts 32 (for example, φ35). In this embodiment, the pair of sinking prevention plates 30 is connected by eight lag screw bolts 32 arranged in two rows of four bolts each. The connection of the pair of sinking prevention plates 30 may be realized by other means, for example, GIR (Glued-in Rod).

[0024] When the wooden beam 20 is inserted into the through-hole 11 of the wooden column 10, a gap exists between the upper surface of the wooden beam 20 (more precisely, the upper surface of the anti-slump plate 30 disposed on the upper surface of the wooden beam 20) and the upper inner circumferential surface of the through-hole 11 of the wooden column 10. In order to fill the gap, a wedge member 40 having a substantially triangular cross section is inserted. The wedge member 40 is formed, for example, from laminated veneer lumber (LVL).

[0025] In this embodiment, a pair of wedge members 40 are used. That is, one wedge member 40 is inserted from one opening position of the through hole 11 of the wooden column 10, and the other wedge member 40 is inserted from the other opening position of the through hole 11. Each of the pair of wedge members 40 is divided into three along the width direction of the wooden beam 20, and as a result, two through holes 41 extending in the insertion direction (penetration direction of the through hole 11) are formed. The through hole 41 formed in one wedge member 40 communicates with the through hole 41 formed in the other wedge member 40. A tension bolt 50 (for example, M16 L = 590 mm) is inserted into the through hole 41 thus communicated, and two nuts 51 are fastened via a spacer 52 and torque is applied, thereby fixing the two wedge members 40 to each other. As a result, the lower surface of each wedge member 40 adheres closely to the sinking prevention plate 30, and the upper surface of each wedge member 40 adheres closely to the upper inner peripheral surface of the through-hole 11 of the wooden column 10, so that the wooden beam 20 is firmly fixed to the wooden column 10. One of the pair of wedge members 40 is an example of a first wedge member, and the other of the pair of wedge members 40 is an example of a second wedge member.

[0026] In this embodiment, the upper inner peripheral surface of the through hole 11 of the wooden column 10 has a tapered surface 12 that is inclined from the opening position of the through hole 11 toward the back side so that the above-mentioned gap (the gap between the upper surface of the wooden beam 20 and the upper inner peripheral surface of the through hole 11) becomes narrower (in other words, it is inclined downward toward the back side from the opening position of the through hole 11). In this embodiment, the upper inner peripheral surface of the through hole 11 is composed of two tapered surfaces 12, namely, a tapered surface 12 that is inclined toward the back side from one opening position of the through hole 11, and a tapered surface 12 that is inclined toward the back side from the other opening position of the through hole 11. When the upper surfaces of the pair of wedge members 40 abut against these tapered surfaces 12, the fastening force of the pair of wedge members 40 by the tension bolt 50 is transmitted to the upper inner peripheral surface of the through hole 11, and as a result, the wooden beam 20 is firmly fixed to the wooden column 10. One of the two tapered surfaces 12 is an example of a first tapered surface, and the other of the two tapered surfaces 12 is an example of a second tapered surface.

[0027] In this embodiment, screws 34 are driven into the portion of the wooden beam 20 inserted into the through-hole 11 of the wooden column 10. The screws 34 are driven in a direction (Z-axis direction) perpendicular to the fiber direction (Y-axis direction) of the wooden beam 20. As shown in Figs. 3 and 6, in this embodiment, eight screws 34 arranged in two rows of four screws each are driven into the wooden beam 20. That is, a plurality of screws 34 are lined up in the width direction (X-axis direction) and length direction (Y-axis direction) of the wooden beam 20. The diameter of the screws 34 is, for example, 8 mm, and the length of the screws 34 is, for example, 320 mm.

[0028] Of the eight screws 34, four screws 34 in two rows (hereinafter also referred to as "upper screws 34u") are driven downward from the upper surface of the wooden beam 20. On the other hand, the remaining eight screws 34 in two rows (hereinafter also referred to as "lower screws 34d") are driven upward from the lower surface of the wooden beam 20. The upper screws 34u and the lower screws 34d are alternately arranged in the longitudinal direction (Y-axis direction) of the wooden beam 20. In other words, one upper screw 34u is disposed between two lower screws 34d in the longitudinal direction of the wooden beam 20, and one lower screw 34d is disposed between two upper screws 34u in the longitudinal direction of the wooden beam 20. One of the upper screw 34u and the lower screw 34d is an example of a first screw, and the other of the upper screw 34u and the lower screw 34d is an example of a second screw.

[0029] In this embodiment, the eight screws 34 are driven into a central portion 20C in the longitudinal direction of the wooden beam 20, which is a portion of the wooden beam 20 inserted into the through-hole 11 of the wooden column 10. Here, the central portion 20C of the wooden beam 20 means a central portion when the portion of the wooden beam 20 inserted into the through-hole 11 is divided into thirds in the longitudinal direction of the wooden beam 20.

[0030] As described above, the column-beam joint structure 110A of the joint 110 in the building 100 of this embodiment includes the wooden column 10 and the wooden beam 20 joined to the wooden column 10. The wooden column 10 has a through hole 11, and the wooden beam 20 is inserted into the through hole 11. The column-beam joint structure 110A further includes a screw 34 that is driven into the part of the wooden beam 20 inserted into the through hole 11 in a direction perpendicular to the fiber direction of the wooden beam 20. Therefore, according to the column-beam joint structure 110A of this embodiment, when a large force acts on the joint 110, it is possible to suppress the occurrence of cracks in the fiber direction of the wooden beam 20. As a result, the wooden beam 20 can be significantly deformed while retaining the force, and the toughness performance of the joint 110 can be improved.

[0031] Moreover, the column-beam joint structure 110A of this embodiment includes an upper screw 34u driven into the upper surface of the wooden beam 20 and a lower screw 34d driven into the lower surface of the wooden beam 20. Therefore, according to the column-beam joint structure 110A of this embodiment, the screws 34 are arranged in both the upper and lower parts of the wooden beam 20, and when a large force is applied to the joint 110, it is possible to suppress the occurrence of cracks in the fiber direction in both the upper and lower parts of the wooden beam 20. As a result, the toughness performance of the joint 110 can be effectively improved.

[0032] In addition, in the column-beam joint structure 110A of this embodiment, one upper screw 34u is disposed between two lower screws 34d in the longitudinal direction of the wooden beam 20. Therefore, according to the column-beam joint structure 110A of this embodiment, the screws 34 are disposed in a well-balanced manner in both the upper and lower parts of the wooden beam 20, and when a large force is applied to the joint 110, it is possible to effectively suppress the occurrence of cracks in the fiber direction in both the upper and lower parts of the wooden beam 20. As a result, the toughness performance of the joint 110 can be further effectively improved. Similarly, in the column-beam joint structure 110A of this embodiment, one lower screw 34d is disposed between two upper screws 34u in the longitudinal direction of the wooden beam 20, so that in this respect, it is possible to effectively suppress the occurrence of cracks in the fiber direction in both the upper and lower parts of the wooden beam 20, and it is possible to further effectively improve the toughness performance of the joint 110.

[0033] Moreover, the column-beam joint structure 110A of this embodiment includes a plurality of screws 34 arranged in the width direction of the wooden beam 20. Therefore, according to the column-beam joint structure 110A of this embodiment, a plurality of screws 34 are arranged in the width direction of the wooden beam 20, and when a large force is applied to the joint 110, it is possible to suppress the occurrence of cracks in the fiber direction across the entire width direction of the wooden beam 20. As a result, the toughness performance of the joint 110 can be effectively improved.

[0034] In the beam-column joint structure 110A of this embodiment, the screw 34 is driven into the central portion 20C in the longitudinal direction of the wooden beam 20, which is the portion of the wooden beam 20 inserted into the through hole 11 of the wooden column 10. Therefore, according to the beam-column joint structure 110A of this embodiment, it is possible to suppress cracks in the fiber direction in the central portion 20C of the wooden beam 20, which is prone to cracks when a large force is applied to the joint 110, and it is possible to effectively improve the toughness performance of the joint 110.

[0035] The beam-column joint structure 110A of the joint 110 in the building 100 of this embodiment includes a wooden column 10 with a through hole 11 formed therein, a wooden beam 20 inserted into the through hole 11, and a wedge member 40 inserted into the gap between the wooden beam 20 and the inner peripheral surface of the through hole 11. The inner peripheral surface of the through hole 11 has a tapered surface 12 that is inclined from the opening position of the through hole 11 toward the back side so that the gap narrows. Therefore, according to the beam-column joint structure 110A of this embodiment, the wooden beam 20 can be firmly fixed to the wooden column 10 by filling the gap using the wedge member 40 without using an angle washer, and the construction of the joint 110 can be simplified.

[0036] In the column-beam joint structure 110A of the building 100 of this embodiment, the inner peripheral surface of the through hole 11 has a first tapered surface 12 that slopes from one opening position of the through hole 11 toward the back side, and a second tapered surface 12 that slopes from the other opening position of the through hole 11 toward the back side, and the column-beam joint structure 110A includes a first wedge member 40 that abuts against the first tapered surface 12, and a second wedge member 40 that abuts against the second tapered surface 12. Therefore, according to the column-beam joint structure 110A of this embodiment, the wooden beam 20 can be fixed to the wooden column 10 more firmly using the pair of wedge members 40.

[0037] In the column-beam joint structure 110A of the building 100 of this embodiment, the inner peripheral surface of the through hole 11 is the upper inner peripheral surface. Therefore, according to the column-beam joint structure 110A of this embodiment, the wedge member 40 can be used to fill the gap between the wooden beam 20 and the upper inner peripheral surface of the through hole 11, making it possible to further facilitate the construction of the joint 110.

[0038] 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.

[0039] The configurations of the building 100 and the beam-column joint structure 110A in the above embodiment are merely examples and can be modified in various ways. For example, in the above embodiment, the number, driving positions, and driving directions of the screws 34 into the wooden beams 20 can be modified in various ways.

[0040] In the above embodiment, the screw 34 is driven into the portion of the wooden beam 20 inserted into the through hole 11, but instead of or in addition to this, the screw 34 may be driven into another portion of the wooden beam 20, or the screw 34 may be driven into the wooden column 10. Also, driving the screw 34 into the wooden members 10, 20 may be omitted.

[0041] In the above embodiment, the joint 110 has a pair of tapered surfaces 12 and a pair of wedge members 40, but the joint 110 may have one tapered surface 12 and one wedge member 40, or the joint 110 may have three or more tapered surfaces 12 and three or more wedge members 40. In addition, the joint 110 does not have to have a tapered surface 12.

[0042] In the above embodiment, the wedge member 40 is inserted into the gap between the wooden beam 20 and the upper inner surface of the through hole 11 of the wooden column 10, but instead of this, or in addition, the wedge member 40 may be inserted into the gap between the wooden beam 20 and the other inner surface of the through hole 11.

[0043] In the above embodiment, a column-beam joint structure 110A has been described in which a wooden beam 20 is joined to a wooden column 10 while being inserted into a through hole 11 of the wooden column 10. However, the technology disclosed in this specification is not limited to such a joint structure and can be widely applied to general joint structures between a wooden column 10 and a wooden beam 20. [Explanation of symbols]

[0044] 11: Through hole 12: Tapered surface 16: Hole for course thread 20: Wooden beam 20C: Center 30: Anti-sinking plate 32: Lag screw bolt 34: Screw 34d: Lower screw 34u: Upper screw 40: Wedge member 41: Through hole 50: Pull bolt 51: Nut 52: Spacer 90: Foundation 100: Building 101: Floor surface 102: Joist material 103: Floor material 110: Joint 110A: Column-beam joint structure

Claims

1. A column-beam joint structure, A wooden pillar having a through hole formed therein; A wooden beam inserted into the through hole; A wedge member inserted into a gap between the wooden beam and an inner peripheral surface of the through hole; Equipped with A column-beam joint structure, wherein the inner surface of the through hole has a tapered surface that is inclined so that the gap narrows from the opening position of the through hole toward the back side.

2. The column-beam joint structure according to claim 1, the inner peripheral surface of the through hole has a first tapered surface inclined from one opening position of the through hole toward the back side, and a second tapered surface inclined from the other opening position of the through hole toward the back side, The column-beam joint structure comprises a first wedge member abutting the first tapered surface and a second wedge member abutting the second tapered surface.

3. The column-beam joint structure according to claim 1 or 2, A column-beam joint structure, wherein the inner surface of the through hole is the upper inner surface.

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