Construction method of through-joint structure

Abstract

To provide a through-joint structure of a wooden pillar and a wooden beam capable of suppressing uneven distribution of stress in a through joint.SOLUTION: A construction method of a through-joint structure for inserting a pair of wedge members 80 between the upper surface 40U of the wooden beam 40 and the upper inner wall surface 22U of the through hole 22, respectively on both sides of the through hole 22 of the wooden pillar 20 through which the wooden beam 40 penetrated. The method includes the following steps of: extending a jack 70 between a pair of wedge members 80 and a pair of reaction members 62 that are interconnected to each other and placed on the outside of the pair of wedge members 80 to take a reaction from the reaction members 62; and inserting the wedge member 80 between the upper surface 40U of the wooden beam 40 and the upper inner wall surface 22U of the through hole 22.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a construction method for a through-joint structure.

Background Art

[0002] In a through-joint structure of a wooden column and a wooden beam, a connecting structure is known in which each of a pair of wedge members driven into a through-hole of the wooden column from both sides is biased toward the through-hole side by a compression spring to suppress the pair of wedge members from coming out during an earthquake (see, for example, Patent Document 1).

[0003] Also, in a through-joint structure of a wooden column and a wooden beam, a connecting structure is known in which a pair of wedge members driven into a through-hole of the wooden column from both sides are connected by bolts and nuts to suppress the pair of wedge members from coming out during an earthquake (see, for example, Patent Documents 2 and 3).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in a through-joint structure of a wooden column and a wooden beam, wedge members are driven between the upper inner wall surface of the through-hole of the wooden column and the upper surface of the wooden beam from both sides of the through-hole of the wooden column by a hammer or the like.

[0006] However, in this case, a difference is likely to occur in the driving amounts of a pair of wedge members driven into both sides of the through-hole of the wooden column, and stress may be concentrated at the through-joint portion.

[0007] In view of the above facts, an object of the present invention is to suppress the uneven distribution of stress in the through-joint portion in the through-joint structure of a wooden column and a wooden beam.

Means for Solving the Problems

[0008] The construction method of the through-joint structure according to claim 1 is a construction method of a through-joint structure in which a pair of wedge members are respectively fitted between the upper surface of the wooden beam and the upper inner wall surface of the through-hole of the wooden column through which the wooden beam penetrates. The jack between a pair of the wedge members and a pair of reaction members arranged outside the pair of wedge members and connected to each other is extended, and the reaction force is taken by the reaction members to push the wedge members between the upper surface of the wooden beam and the upper inner wall surface of the through-hole.

[0009] According to the construction method of the through-joint structure according to claim 1, the jack between a pair of wedge members and a pair of reaction members arranged outside the pair of wedge members and connected to each other is extended. As a result, the jack takes the reaction force by the reaction members and pushes the wedge members between the upper surface of the wooden beam and the upper inner wall surface of the through-hole.

[0010] As a result, since the pushing force of the jack acts on the pair of wedge members substantially evenly through the pair of reaction members, the pushing amounts of the pair of wedge members with respect to the through-hole of the wooden column can be made substantially equal. Therefore, the uneven distribution of stress in the through-joint portion of the wooden column and the wooden beam can be suppressed.

[0011] Further, when the wedge member is driven between the upper surface of the wooden beam and the upper inner wall surface of the through-hole of the wooden column with a hammer or the like, if the hammer or the like interferes with the upper surface of the wooden beam, the upper surface may be recessed.

[0012] On the other hand, in the present invention, as described above, since the wedge member is pushed between the upper surface of the wooden beam and the upper inner wall surface of the through-hole of the wooden column by the jack, it is possible to suppress the dent or the like on the upper surface of the wooden beam.

[0013] The through-joint structure according to claim 2, in the construction method of the through-joint structure according to claim 1, extends the jacks respectively provided between the pair of said wedge members and the pair of said reaction members.

[0014] According to the construction method of the through-joint structure according to claim 2, the jacks respectively provided between the pair of wedge members and the pair of reaction members are extended. Thereby, the pushing-in amount of the pair of wedge members pushed between the upper surface of the wooden beam and the upper inner wall surface of the through-hole of the wooden column can be easily adjusted.

[0015] The through-joint structure according to claim 3, in the construction method of the through-joint structure according to claim 1 or claim 2, the reaction member is placed on the upper surface of the wooden beam via a protective cover.

[0016] According to the construction method of the through-joint structure according to claim 3, the reaction member is placed on the upper surface of the wooden beam via a protective cover. By placing the reaction member on the upper surface of the wooden beam via such a protective cover, damage etc. to the upper surface of the wooden beam can be suppressed.

Effect of the Invention

[0017] As described above, according to the present invention, in the through-joint structure of a wooden column and a wooden beam, uneven distribution of stress at the through-joint portion can be suppressed.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0019] Hereinafter, an embodiment will be described with reference to the drawings.

[0020] (Through-joint structure of wooden columns and beams) First, the through-joint structure of wooden columns and beams according to this embodiment will be described.

[0021] In FIGS. 1 and 2, a wooden column 20 and a wooden beam 40 to which the through-joint structure of wooden columns and beams according to this embodiment is applied are shown. The wooden column 20 and the wooden beam 40 are formed of a wooden material such as laminated wood, for example. The wooden column 20 and the wooden beam 40 are through-jointed at the through-joint portion J.

[0022] (Wooden column) The wooden column 20 is formed in a rectangular cross-section (prismatic shape). Further, as shown in FIG. 2, the wooden column 20 has a joint portion 20A to which the wooden beam 40 is joined. A through-hole 22 is formed in a side surface 20S of the joint portion 20A. The through-hole 22 penetrates the joint portion 20A in the width direction of the wooden column 20 (the material axis direction of the wooden beam 40). The cross-sectional shape of the through-hole 22 is a rectangular shape corresponding to the cross-sectional shape of the wooden beam 40.

[0023] (Wedge receiving member) As shown in FIG. 1, a wedge receiving member 30 is attached to the upper inner wall surface 22U of the through-hole 22. The wedge receiving member 30 is a member that fills the gap between the upper inner wall surface 22U of the through-hole 22 and an inclined surface 80U of a pair of wedge members 80 described later.

[0024] The upper surface 30U of the wedge receiving member 30 is a flat surface (horizontal surface). The wedge receiving member 30 is fixed to the upper inner wall surface 22U of the through-hole 22 by, for example, screws (not shown) in a state of being overlapped with the upper inner wall surface 22U of the through-hole 22.

[0025] The lower surface of the wedge receiving member 30 is formed in a substantially triangular shape that is convex downward when viewed in the beam width direction of the wooden beam 40. A pair of inclined surfaces 30L are formed on the lower surface of the wedge receiving member 30. The pair of inclined surfaces 30L are inclined upward from the central side to both end sides of the wedge receiving member 30 when viewed in the beam width direction of the wooden beam 40.

[0026] (Wooden beam) As shown in FIG. 2, the wooden beam 40 is formed in a rectangular cross-sectional shape. Further, the wooden beam 40 is passed through the through hole 22 of the wooden column 20. Note that the wooden beam 40 is installed between a pair of adjacent wooden columns 20 and constitutes a structure together with the pair of wooden columns 20.

[0027] As shown in FIG. 1, 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 through hole 22 of the wooden column 20, and its lower surface 40L is placed on the lower inner wall surface 22L of the through hole 22. On the other hand, the beam portion 40B is arranged outside the through hole 22 of the wooden column 20.

[0028] (Wedge member) The pair of wedge members 80 are fixing members that fix the wooden beam 40 to the wooden column 20 by filling the gap between the inclined surface 30L of the wedge receiving member 30 provided on the upper inner wall surface 22U of the through hole 22 of the wooden column 20 and the upper surface 40U of the wooden beam 40.

[0029] Specifically, the pair of wedge members 80 are made of, for example, metal and are triangular as a whole when viewed in the beam width direction of the wooden beam 40. The lower surface 80L of each wedge member 80 is a flat surface (horizontal plane) and is placed on the upper surface 40U of the wooden beam 40.

[0030] The upper surface of each wedge member 80 is an inclined surface 80U that is inclined downward toward the wooden column 20 side when viewed in the beam width direction of the wooden beam 40. The inclination angle of this inclined surface 80U is substantially the same as the inclination angle of the inclined surface 30L of the above-described wedge receiving member 30. This inclined surface 80U is overlapped with the inclined surface 30L of the wedge receiving member 30.

[0031] Here, a pair of wedge members 80 are fitted (driven) between the inclined surface 30L of the wedge receiving member 30 and the upper surface 40U of the wooden beam 40 from both sides of the through-hole 22 of the wooden column 20. Thereby, the wooden beam 40 is fixed to the wooden column 20.

[0032] (Construction method of the through-joint structure) Next, an example of the construction method of the through-joint structure according to the present embodiment will be described.

[0033] (Wooden beam installation process) First, in the wooden beam installation process, for example, the wooden beam 40 is lifted by a hoist (not shown) or the like, and the wooden beam 40 is passed through the through-hole 22 of the erected wooden column 20. Then, the joint portion 40A of the wooden beam 40 is disposed in the through-hole 22 of the wooden column 20.

[0034] (Pushing-in device installation process) Next, as shown in FIGS. 3, 4, and 5, a pushing-in device 60 is installed on the upper surface 40U of the beam portion 40B of the wooden beam 40 via a protective cover 50. The protective cover 50 is formed of a metal plate or the like.

[0035] The protective cover 50 is bent into a C-shaped cross-section with an open bottom. This protective cover 50 is placed over the upper part of the beam portion 40B of the wooden beam 40, covering the upper surface 40U and the upper parts of the side surfaces 40S on both sides of the beam portion 40B.

[0036] Note that the shape of the protective cover 50 is not limited to the C-shaped cross-section, and may be, for example, a flat plate or the like. Further, the protective cover 50 may be provided as necessary and can be omitted as appropriate.

[0037] As shown in FIG. 3, the pushing device 60 includes a pair of reaction members 62, a pair of connecting rods 64, and a pair of jacks 70. The pair of reaction members 62 are formed of H-shaped steel as an example. Further, the pair of reaction members 62 are arranged on the beam portions 40B of the wooden beams 40 arranged on both sides of the wooden column 20 with the longitudinal direction being the beam width direction of the wooden beam 40.

[0038] The intermediate portion in the longitudinal direction of each reaction member 62 is placed on the upper surface 40U of the beam portion 40B of the wooden beam 40 via the protective cover 50. Further, the pair of reaction members 62 are arranged outside a pair of wedge members 80 temporarily inserted between the upper inner wall surface 22U of the through hole 22 of the wooden column 20 and the upper surface 40U of the wooden beam 40 from both sides of the through hole 22 of the wooden column 20.

[0039] The pair of reaction members 62 are arranged to face each other with the pair of wedge members 80 interposed therebetween. Further, the pair of reaction members 62 are arranged at positions separated outward from the pair of wedge members 80. Thereby, an installation space for the jack 70 described later is formed between the pair of reaction members 62 and the pair of wedge members 80. The pair of reaction members 62 are connected via a pair of connecting rods 64.

[0040] Note that the pair of reaction members 62 are not limited to H-shaped steel and may be formed of, for example, C-shaped steel, steel pipe steel, or the like.

[0041] The pair of connecting rods 64 are formed of PC steel bars as an example. Further, the pair of connecting rods 64 are arranged on both sides of the wooden column 20 along the material axis direction of the wooden beam 40. Note that the connecting rod 64 is an example of a connecting member.

[0042] Both ends of the pair of connecting rods 64 are slidably passed through connecting holes (not shown) formed at both ends in the longitudinal direction of the pair of reaction members 62. Thereby, the pair of reaction members 62 are made movable (slidable) along the pair of connecting rods 64.

[0043] Male threads are formed at both ends of the pair of connecting rods 64. By tightening nuts 66 on both ends of the pair of connecting rods 64, the pair of reaction members 62 are restricted from moving (sliding) away from each other. Also, the distance (position) between the pair of reaction members 62 can be adjusted according to the tightening amount of the nuts 66 with respect to the connecting rods 64. Jacks 70 are respectively installed between the pair of reaction members 62 and the pair of wedge members 80.

[0044] As shown in FIGS. 3, 4, and 5, each jack 70 is, for example, a hydraulic jack and is placed on the upper surface 40U of the wooden beam 40 via a protective cover 50. Also, each jack 70 has a cylinder (jack body) 70A arranged with its axial direction along the material axial direction of the wooden beam 40, and a piston (ram) 70B that expands and contracts in the material axial direction of the wooden beam 40 with respect to the cylinder 70A. This jack 70 is configured to push the wedge member 80 toward the wooden column 20 by taking the reaction force of the reaction member 62 when it is actuated.

[0045] Here, in the installation process of the pushing device, on both sides of the wooden column 20, a pair of reaction members 62 are placed on the upper surface 40U of the beam portion 40B of the wooden beam 40 via a protective cover 50, and the pair of reaction members 62 are connected by a pair of connecting rods 64. Also, jacks 70 are respectively installed between the pair of reaction members 62 and the pair of wedge members 80.

[0046] Note that the installation order of the pair of reaction members 62, the pair of connecting rods 64, and the pair of jacks 70 can be changed as appropriate.

[0047] (Wedge member pushing process) Next, in the wedge member pressing step, each jack 70 is actuated to extend the piston 70B of the cylinder 70A toward the wedge member 80. As a result, each jack 70 takes a reaction force from each reaction member 62 and presses the wedge member 80 between the upper surface 40U of the wooden beam 40 and the upper inner wall surface 22U of the through hole 22 of the wooden column 20. As a result, each wedge member 80 is fitted between the upper surface 40U of the wooden beam 40 and the upper inner wall surface 22U of the through hole 22 of the wooden column 20, and the wooden beam 40 is fixed to the wooden column 20.

[0048] (Effect) Next, the effects of the present embodiment will be described.

[0049] According to the present embodiment, as described above, in the wedge member pressing step, the piston 70B of the jack 70 installed between the pair of wedge members 80 and the pair of reaction members 62 arranged outside the pair of wedge members 80 and connected to each other is extended. As a result, each jack 70 takes a reaction force from each reaction member 62 and presses the wedge member 80 between the upper surface 40U of the wooden beam 40 and the upper inner wall surface 22U of the through hole 22.

[0050] As a result, since the pushing force of the jack 70 acts on the pair of wedge members 80 substantially evenly via the pair of reaction members 62, the pushing amounts of the pair of wedge members 80 with respect to the through hole 22 of the wooden column 20 can be made substantially even. Therefore, uneven distribution of stress at the through-joint J of the wooden column 20 and the wooden beam 40 can be suppressed.

[0051] Further, in the present embodiment, the jacks 70 provided between the pair of wedge members 80 and the pair of reaction members 62 are extended. As a result, the pushing amounts of the pair of wedge members 80 pushed between the upper surface 40U of the wooden beam 40 and the upper inner wall surface 22U of the through hole 22 of the wooden column 20 can be easily adjusted.

[0052] Also, when the wedge member 80 is driven in between the upper surface 40U of the wooden beam 40 and the upper inner wall surface 22U of the through hole 22 of the wooden column 20 with a hammer or the like, if the hammer or the like interferes with the upper surface 40U of the wooden beam 40, the upper surface 40U may be recessed.

[0053] In contrast, in the present embodiment, as described above, since the wedge member 80 is pushed in by the jack 70 between the upper surface 40U of the wooden beam 40 and the upper inner wall surface 22U of the through hole 22 of the wooden column 20, it is possible to suppress dents and the like on the upper surface 40U of the wooden beam 40.

[0054] Further, the reaction force member 62 and the jack 70 are placed on the upper surface 40U of the wooden beam 40 via the protective cover 50. By placing the reaction force member 62 and the jack 70 on the upper surface 40U of the wooden beam 40 via the protective cover 50 in this way, it is possible to suppress scratches and the like on the upper surface 40U of the wooden beam 40.

[0055] (Modification example) Next, a modification example of the above embodiment will be described.

[0056] In the above embodiment, the jacks 70 are respectively installed between the pair of reaction force members 62 and the pair of wedge members 80. However, the jack 70 may be installed only between, for example, one reaction force member 62 and one wedge member 80. In this case, the other reaction force member 62 and the other wedge member 80 may be brought into contact with each other via a spacer, for example, or may be brought into direct contact with each other.

[0057] Further, in the above embodiment, the connecting member is the connecting rod 64. However, the connecting member is not limited to the connecting rod 64, and may be, for example, a wire material such as PC steel wire or wire rope, or a shaped steel such as H-shaped steel.

[0058] Further, in the above embodiment, the wedge receiving member 30 is attached to the upper inner wall surface 22U of the through hole 22 of the wooden column 20. However, the wedge receiving member 30 may be provided as necessary and can be appropriately omitted. Also, the shapes of the wedge receiving member 30 and the wedge member 80 can be appropriately changed.

[0059] The above describes one embodiment of the present invention. However, the present invention is not limited to such embodiments, and one embodiment and various modifications may be appropriately combined and used, and of course, it can be implemented in various forms without departing from the gist of the present invention.

Explanation of Reference Numerals

[0060] 20 Wooden column 22 Through-hole 22U Upper inner wall surface 40 Wooden beam 40U Upper surface 50 Protection cover 62 Reaction member 70 Jack 80 Wedge member

Claims

1. A construction method of a through-joint structure in which a pair of wedge members are respectively fitted between the upper surface of the wooden beam and the upper inner wall surface of the through-hole on both sides of the through-hole of the wooden column through which the wooden beam passes, extending a jack between the pair of the wedge members and a pair of reaction members arranged outside the pair of the wedge members and connected to each other, taking reaction force on the reaction members, and pushing the wedge members between the upper surface of the wooden beam and the upper inner wall surface of the through-hole, A construction method of a through-joint structure.

2. Extending the jacks respectively provided between the pair of the wedge members and the pair of the reaction members, The construction method of the through-joint structure according to Claim 1.

3. The reaction member is placed on the upper surface of the wooden beam through a protective cover, The construction method of the through-joint structure according to Claim 1 or Claim 2.

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