Wooden column-beam joint structure

Abstract

To improve workability of a wooden beam to be joined to an upper end of a wooden column.SOLUTION: A wooden column-beam joint structure comprises: a wooden column 20; a wooden beam 40 that penetrates a groove 22 formed on an upper surface 20U of the wooden column 20; and a plurality of through bolts 50 that are arranged along a beam width direction of the wooden beam 40 to join a connection part 40A of the wooden beam 40 arranged in the groove 22 to an upper end of the wooden column 20.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a joining structure of wooden columns and beams.

Background Art

[0002] There is known a column-beam joining structure in which a wooden beam is inserted into an opening of a receiving steel beam protruding laterally from a column, the uneven grooves of the receiving steel beam and the wooden beam are fitted together, and a hardening material is filled in the gap between the receiving steel beam and the wooden beam (see, for example, Patent Document 1).

[0003] Also, there is known a column-beam joining structure in which the base end portion of a beam member is inserted into the upper opening portion of a column having a C-shaped cross section, and the column and the base end portion of the beam member are connected by a connecting fitting (for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, when joining the end portion of a wooden beam to the upper end portion of a wooden column, for example, at the top floor of a structure, etc., it is necessary to provide shoring for supporting the wooden beam, etc., which takes time and effort in construction.

[0006] In consideration of the above facts, an object of the present invention is to improve the workability of a wooden beam joined to the upper end portion of a wooden column.

Means for Solving the Problems

[0007] The joint structure of a wooden column and beam according to claim 1 comprises a wooden column, a wooden beam penetrating a groove formed on the upper surface of the wooden column, and a plurality of joint members arranged along the beam width direction of the wooden beam and joining the joint of the wooden beam disposed within the groove and the upper end of the wooden column.

[0008] According to the joint structure of a wooden column and beam according to claim 1, the wooden beam penetrates a groove formed on the upper surface of the wooden column. Further, the plurality of joint members are arranged along the beam width direction of the wooden beam. By these joint members, the upper end of the wooden column and the joint of the wooden beam disposed within the groove of the wooden column are joined.

[0009] By passing the wooden beam through the groove formed on the upper surface of the wooden column in this way, the joint of the wooden beam is supported by the wooden column. Therefore, when joining the wooden beam to the upper end of the wooden column, it is possible to omit a shoring or the like for supporting the wooden beam, or reduce the number of shorings or the like. Accordingly, the workability of the wooden beam joined to the upper end of the wooden column can be improved.

[0010] Further, by disposing the joint of the wooden beam within the groove formed on the upper surface of the wooden column, the upper end of the wooden column and the joint of the wooden beam can be easily joined by the plurality of joint members. Accordingly, the workability of the wooden beam joined to the upper end of the wooden column can be further improved.

[0011] The joint structure of a wooden column and beam according to claim 2 is the joint structure of a wooden column and beam according to claim 1, wherein the joint member penetrates the joint in the beam width direction.

[0012] According to the joint structure of a wooden column and beam according to claim 2, the joint member penetrates the joint of the wooden beam in the beam width direction. By passing the joint member through the joint of the wooden beam in the beam width direction in this way, the joint and the side wall portions of the wooden column on both sides thereof can be easily joined. Accordingly, the workability of the wooden beam can be further improved.

[0013] The joining structure of the wooden column and beam according to claim 3 is the joining structure of the wooden column and beam according to claim 1 or claim 2, wherein the bottom surface of the groove portion is inclined when viewed from the beam width direction, and the wooden beam is arranged along the bottom surface of the groove portion.

[0014] According to the joining structure of the wooden column and beam according to claim 3, the bottom surface of the groove portion formed on the upper surface of the wooden column is inclined when viewed from the beam width direction of the wooden beam. By arranging the wooden beam along the bottom surface of this groove portion, the wooden beam can be easily inclined at a predetermined angle. Therefore, the workability of the wooden beam can be further improved.

Effect of the Invention

[0015] As described above, according to the present invention, the workability of the wooden beam joined to the upper end portion of the wooden column can be improved.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0017] Hereinafter, an embodiment will be described with reference to the drawings.

[0018] (Through-joining structure of wooden column and beam) Figures 1, 2, and 3 show a wooden column 20 and a wooden beam 40 to which the through-joint structure of the wooden column and beam according to this embodiment is applied. The wooden column 20 and the wooden beam 40 are formed of wooden materials such as laminated wood, for example.

[0019] (Wooden column) As an example, the wooden column 20 is the column on the top floor of the structure and supports the wooden beam 40 that constitutes the roof beam described later. Further, the wooden column 20 is formed in a rectangular cross-section (prismatic shape). The upper end portion 20A of this wooden column 20 is a joint portion to which the wooden beam 40 is joined.

[0020] The upper surface 20U of the wooden column 20 is an inclined surface inclined according to the inclination angle of the wooden beam 40. A groove portion 22 is formed in the upper surface 20U of the wooden column 20. The groove portion 22 penetrates the upper end portion 20A of the wooden column 20 in the width direction of the wooden column 20 (the material axis direction of the wooden beam 40). The bottom surface 22L of this groove portion 22 is an inclined surface inclined according to the inclination angle of the wooden beam 40, similarly to the upper surface 20U of the wooden column 20.

[0021] As shown in FIGS. 2 and 4, the cross-sectional shape of the groove portion 22 is a U shape corresponding to the cross-sectional shape of the wooden beam 40 when viewed from the material axis direction of the wooden beam 40. A plurality of joint holes 24 into which a through bolt 50 described later is inserted are formed in both side wall portions 20A1 on both sides of the groove portion 22 at the upper end portion 20A of the wooden column 20, respectively.

[0022] The plurality of joint holes 24 are circular through holes that penetrate a pair of side wall portions 20A1 facing each other in the beam width direction of the wooden beam 40 in the beam width direction. Further, the plurality of joint holes 24 formed in one side wall portion 20A1 and the plurality of joint holes 24 formed in the other side wall portion 20A1 are arranged to face each other.

[0023] Counterbores 26 that communicate with the joint holes 24 are formed in the outer surfaces 20S of the pair of side wall portions 20A1. The counterbores 26 are circular holes having a diameter larger than that of the joint holes 24. Nuts 52 tightened to both ends of the through bolt 50 are accommodated in the counterbores 26.

[0024] The countersink 26 is blocked by the plug 28. The plug 28 is formed in a disk shape by, for example, a wood material and is fitted into the countersink 26. By this plug 28, the design property of the wooden column 20 is enhanced by covering the through bolts 50 and nuts 52 described later. Note that the countersink 26 and the plug 28 may be provided as necessary and can be omitted as appropriate.

[0025] (Wooden beam) As shown in FIGS. 1, 3, and 5, the wooden beam 40 is, as an example, a roof beam (inclined beam) that constitutes the roof of a structure and is inclined at a predetermined angle with respect to the horizontal direction. Further, the wooden beam 40 is formed in a rectangular cross-sectional shape. This wooden beam 40 penetrates the groove portion 22 of the wooden column 20.

[0026] The wooden beam 40 has a joint portion 40A and beam portions 40B respectively arranged on both sides of the joint portion 40A. The joint portion 40A is arranged in the groove portion 22 of the wooden column 20, and its lower surface 40L is placed on the bottom surface 22L of the groove portion 22. Further, the upper surface 40U of the joint portion 40A is substantially flush with the upper surface 20U of the wooden column 20. On the other hand, the beam portion 40B is arranged outside the groove portion 22 of the wooden column 20.

[0027] Note that the upper surface 40U of the joint portion 40A is not limited to being substantially flush with the upper surface 20U of the wooden column 20, and for example, there may be a step between the upper surface 40U of the joint portion 40A and the upper surface 20U of the wooden column 20.

[0028] As shown in FIGS. 2 and 4, a plurality of joining holes 44 through which a plurality of through bolts 50 are respectively passed are formed in the joint portion 40A of the wooden beam 40. The plurality of joining holes 44 are circular through holes that penetrate the joint portion 40A of the wooden beam 40 in the beam width direction. Further, the plurality of joining holes 44 communicate with a plurality of joining holes 24 formed in the side wall portions 20A1 on both sides of the wooden column 20 in a state where the joint portion 40A of the wooden beam 40 is arranged in the groove portion 22 of the wooden column 20. The through bolts 50 are respectively inserted into these joining holes 24 and 44.

[0029] (Through bolt) As shown in FIG. 2, a plurality of through bolts 50 are arranged along the beam width direction of the wooden beam 40. These through bolts 50 are inserted into the joining holes 24 formed in the upper end portion 20A of the wooden column 20 and the joining holes 44 formed in the joint portion 40A of the wooden beam 40.

[0030] Male threads are formed at both ends of each through bolt 50. By tightening nuts 52 at both ends of each through bolt 50, the upper end portion 20A of the wooden column 20 and the joint portion 40A of the wooden beam 40 are joined. Note that the through bolt 50 is an example of a joining member.

[0031] (Function) Next, the function of this embodiment will be described.

[0032] As shown in FIGS. 1 and 3, according to this embodiment, the wooden beam 40 penetrates the groove portion 22 formed in the upper surface 20U of the wooden column 20. Further, a plurality of through bolts 50 are arranged along the beam width direction of the wooden beam 40. By these through bolts 50, the upper end portion 20A of the wooden column 20 and the joint portion 40A of the wooden beam 40 disposed in the groove portion 22 of the wooden column 20 are joined.

[0033] By passing the wooden beam 40 through the groove portion 22 formed in the upper surface 20U of the wooden column 20 in this way, the lower surface 40L of the joint portion 40A of the wooden beam 40 is supported by the bottom surface 22L of the groove portion 22. Therefore, when joining the wooden beam 40 to the upper end portion 20A of the wooden column 20, it is possible to omit a shoring or the like for supporting the wooden beam 40, or reduce the number of shorings or the like. Accordingly, the workability of the wooden beam 40 joined to the upper end portion 20A of the wooden column 20 can be improved.

[0034] Further, by disposing the joint portion 40A of the wooden beam 40 in the groove portion 22 formed in the upper surface 20U of the wooden column 20, the upper end portion 20A of the wooden column 20 and the joint portion 40A of the wooden beam 40 can be easily joined by a plurality of through bolts 50.

[0035] Furthermore, the through bolt 50 penetrates the joint portion 40A of the wooden beam 40 in the beam width direction. By passing the through bolt 50 through the joint portion 40A of the wooden beam 40 in the beam width direction in this way, the joint portion 40A and the side wall portions 20A1 of the wooden columns 20 on both sides thereof can be easily joined.

[0036] Furthermore, the bottom surface 22L of the groove portion 22 formed on the upper surface 20U of the wooden column 20 is inclined when viewed from the beam width direction of the wooden beam 40. By arranging the wooden beam 40 along the bottom surface of the groove portion 22, the wooden beam 40 can be easily inclined at a predetermined angle. Therefore, the workability of the wooden beam 40 joined to the upper end portion 20A of the wooden column 20 can be further improved.

[0037] (Modification example) Next, a modification example of the above embodiment will be described.

[0038] In the above embodiment, the joining member for joining the upper end portion 20A of the wooden column 20 and the joint portion 40A of the wooden beam 40 is the through bolt 50. However, the joining member is not limited to the through bolt 50, and for example, a drift pin that penetrates the joint portion 40A of the wooden beam 40 in the beam width direction, or a rod-shaped member (joining pin) such as a steel bar may also be used.

[0039] Also, for rod-shaped members such as a drift and a steel bar, without the joint portion 40A of the wooden beam 40 being penetrated in the beam width direction, for example, a rod-shaped member that joins one side wall portion 20A1 of the wooden column 20 and the joint portion 40A, and a rod-shaped member that joins the other side wall portion 20A1 and the joint portion 40A may be provided separately.

[0040] Also, the joining member is not limited to a rod-shaped member, and for example, a wedge member fitted into the gap between the groove portion 22 of the wooden column 20 and the joint portion 40A of the wooden beam 40, or hardware for joining the side wall portion 20A1 of the wooden column 20 and the joint portion 40A of the wooden beam 40 may also be used.

[0041] In the above-described embodiment, the upper surface 20U of the wooden column 20 is an inclined surface. However, the upper surface 20U of the wooden column 20 is not limited to an inclined surface and may be, for example, a horizontal surface.

[0042] In the above-described embodiment, the wooden beam 40 is an inclined beam. However, the wooden beam 40 is not limited to an inclined beam and may be, for example, a general beam arranged substantially horizontally. In the case where the wooden beam 40 is a general beam arranged substantially horizontally, the bottom surface 22L of the groove portion 22 of the wooden column 20 is, for example, a horizontal surface.

[0043] In the above-described embodiment, the wooden beam 40 is a roof beam. However, the wooden beam 40 is not limited to a roof beam and may be other beams.

[0044] As described above, one embodiment of the present invention has been described. However, the present invention is not limited to such an embodiment, and one embodiment and various modifications may be used in appropriate combination, and it goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention.

Explanation of Reference Numerals

[0045] 20 Wooden column 20A Upper end portion 20U Upper surface 22 Groove portion 22L Bottom surface 40 Wooden beam 40A Joint portion 50 Through bolt (joint member)

Claims

1. A wooden column, a wooden beam penetrating a groove formed on the upper surface of the wooden column, and a plurality of joining members arranged along the beam width direction of the wooden beam and joining the joint portion of the wooden beam disposed in the groove and the upper end portion of the wooden column. A joining structure of a wooden column and beam comprising the above.

2. The joining member penetrates the joint portion in the beam width direction. The joining structure of a wooden column and beam according to Claim 1.

3. The bottom surface of the groove is inclined when viewed from the beam width direction. The wooden beam is disposed along the bottom surface of the groove. The joining structure of a wooden column and beam according to Claim 1 or Claim 2.

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