Connection structure of wooden frame, and connection method of wooden frame

Abstract

To provide a connection structure of wooden frames and a connection method of wooden frames that are easy to construct and can increase strength of horizontal members at a connection portion between vertical members and horizontal members.SOLUTION: A connection structure 10 of wooden frames connects a wooden column 11 where a through-hole 13 having upper and lower inner surfaces facing each other in a vertical direction is formed, with a wooden beam 12 passing through the through-hole 13. The connection structure 10 comprises: a first bearing plate 16 provided on the upper inner surface; and a pressing portion 21 pressing the first bearing plate 16 and the beam 12 so as to separate them from each other inside the through-hole 13. A reinforcing plate 30 is joined to a surface facing the inner side surface of the through-hole 13 in the beam 12.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a connection structure and a connection method for a wooden frame structure in which a wooden vertical member and a wooden horizontal member are connected.

Background Art

[0002] Conventionally, as a connection structure for a wooden frame structure having a wooden vertical member and a wooden horizontal member, a structure is known in which the vertical member and the horizontal member are connected in a state where the horizontal member penetrates through a through-hole formed in the vertical member. As such a connection structure for a wooden frame structure, for example, Patent Document 1 discloses a technique for connecting a vertical member and a horizontal member using a connecting fitting or the like.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the above-described connection structure for a wooden frame structure, it is required that the construction is easy and the load-bearing capacity of the horizontal member is increased at the connection portion between the vertical member and the horizontal member.

Means for Solving the Problems

[0005] The connection structure for a wooden frame structure that solves the above problems connects a wooden vertical member having a through-hole formed with an upper inner surface and a lower inner surface facing each other in the vertical direction and a wooden horizontal member that penetrates through the through-hole. The connection structure for a wooden frame structure includes a pressure plate provided on one of the upper inner surface and the lower inner surface, and a pressing portion that presses the pressure plate and the horizontal member so as to be separated from each other inside the through-hole. A reinforcing plate is joined to a surface of the horizontal member that faces the inner side surface of the through-hole.

Effects of the Invention

[0006] According to the present invention, it is possible to provide a connection structure and a connection method for a wooden structure that are easy to construct and can enhance the load-bearing capacity of a horizontal member at the connection portion between a vertical member and a horizontal member.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0008] With reference to FIGS. 1 to 8, an embodiment of a connection structure and a connection method of a wooden structure will be described. As shown in FIG. 1, the connection structure 10 of the wooden structure is a structure in which a column 11, which is a wooden vertical member, and a beam 12, which is a wooden horizontal member, are connected. The column 11 extends in the vertical direction. The column 11 has a through hole 13 through which the beam 12 passes. The through hole 13 is formed in a rectangular cross-sectional shape having a width larger than the beam width of the beam 12 and a height larger than the beam depth of the beam 12. The beam 12 is connected to the column 11 by a connection portion 15 at a portion disposed inside the through hole 13.

[0009] (Connection portion) As shown in FIG. 2, the connection portion 15 (see FIG. 1) has a first pressure plate 16, a second pressure plate 17, a third pressure plate, and a pressing portion inside the through hole 13 of the column 11. Details of the third pressure plate and the pressing portion will be described with reference to FIG. 3, which will be described later.

[0010] The first pressure plate 16 is made of a material having a higher strength than wood, such as a steel plate. The first pressure plate 16 is attached to the upper inner surface 13a of the through hole 13 by screws (not shown). The first pressure plate 16 is formed in a shape that covers the entire upper inner surface 13a of the through hole 13.

[0011] The second pressure plate 17 is made of a material having a higher strength than wood, such as a steel plate. The second pressure plate 17 is attached to the lower inner surface 13b of the through hole 13 by screws (not shown). The second pressure plate 17 is formed in a shape that covers the entire lower inner surface 13b of the through hole 13 and has an overhanging portion 17a that protrudes from the through hole 13 in the longitudinal direction of the beam 12. Further, since the second pressure plate 17 covers the entire lower inner surface 13b of the through hole 13 having a width larger than the beam width of the beam 12, it is configured to be able to abut against a reinforcing plate described later in the vertical direction. In the through hole 13, the surface connecting the upper inner surface 13a and the lower inner surface 13b is the inner side surface.

[0012] As shown in FIG. 3, the third support pressure plate 20 is made of a material with higher strength than wood, such as a steel plate. The third support pressure plate 20 covers the entire upper surface of the portion disposed inside the through hole 13 in the beam 12, and is formed in a shape having an overhanging portion 20a that protrudes from the through hole 13 in the longitudinal direction of the beam 12. Further, the third support pressure plate 20 is formed in a shape that protrudes from the beam 12 in the width direction of the beam 12 so as to be in contact with the reinforcing plate 30 described later in the vertical direction.

[0013] The pressing portion 21 is a member that presses the first support pressure plate 16 (see FIG. 2) and the third support pressure plate 20 so as to be separated from each other. In the present embodiment, the pressing portion 21 is provided at positions that press each corner portion of each of the first support pressure plate 16 and the third support pressure plate 20.

[0014] As shown in FIG. 4, the pressing portion 21 includes a lag screw bolt 22, a hexagon bolt 23, and a hexagon nut 24. The lag screw bolt 22 is embedded in the beam 12 (see FIG. 1). The lag screw bolt 22 extends vertically inside the beam 12 such that the upper end is exposed from the upper surface 12a of the beam 12 and the lower end is exposed from the lower surface 12b of the beam 12 (see FIG. 1). A female screw portion 25 into which the hexagon bolt 23 is screwed is formed at the end of the lag screw bolt 22 on the side of the third support pressure plate 20.

[0015] The hexagon bolt 23 is a bolt member. The hexagon bolt 23 is screwed into the female screw portion 25 of the lag screw bolt 22 through an insertion hole 26 formed in the third support pressure plate 20. The hexagon nut 24 is screwed onto the shaft portion of the hexagon bolt 23 between the third support pressure plate 20 and the head of the hexagon bolt 23. The insertion hole 26 is formed in a size that allows the third support pressure plate 20 to lock the hexagon nut 24.

[0016] As shown in Fig. 5(a), in a state where the pressing portion 21 is disposed inside the through hole 13, the hexagonal bolt 23 is rotated with respect to the lag screw bolt 22 so that the head of the hexagonal bolt 23 is separated from the beam 12, thereby pressing the first support plate 16 against the upper inner surface 13a of the column 11.

[0017] Also, as shown in Fig. 5(b), the pressing portion 21 is configured to press the third support plate 20 against the upper surface 12a of the beam 12 by rotating the hexagonal nut 24 with respect to the hexagonal bolt 23 so as to be separated from the head of the hexagonal bolt 23.

[0018] That is, the pressing portion 21 is configured to press the first support plate 16 and the third support plate 20 so as to be separated from each other by the rotation of the hexagonal bolt 23 with respect to the lag screw bolt 22 and the rotation of the hexagonal nut 24 with respect to the hexagonal bolt 23.

[0019] (Reinforcing plate) As shown in Fig. 6, the beam 12 has reinforcing plates 30 joined to the surfaces facing the inner side surfaces of the through hole 13, that is, the side surfaces of the portion disposed inside the through hole 13, specifically, the front side surface and the back side surface in the drawing in Fig. 6.

[0020] The reinforcing plate 30 is composed of a rectangular steel plate that covers the entire area between the pair of pressing portions 21 in a side view of the beam 12. Specifically, the reinforcing plate 30 is formed in a shape such that in the area between the pair of lag screw bolts 22, the upper end surface 30a is flush with the upper surface 12a of the beam 12 and the lower end surface 30b is flush with the lower surface 12b of the beam 12. That is, the reinforcing plate 30 is formed in a shape such that the upper end surface 30a abuts against the third support plate 20 and the lower end surface 30b abuts against the second support plate 17 (see Figs. 1 and 2) in a state where the beam 12 is connected to the column 11.

[0021] The reinforcing plate 30 is formed with a plurality of joining holes 31. The reinforcing plate 30 is joined to the side surface of the beam 12 by a joining member (not shown) such as a screw that passes through the joining hole 31 and is screwed into the beam 12. The joining member is preferably a countersunk head screw from the viewpoint of suppressing the protrusion of the reinforcing plate 30 to the outside.

[0022] The joining holes 31 are formed in the central portion and the outer peripheral portion of the reinforcing plate 30. The joining holes 31 formed in the central portion are formed around the center of the reinforcing plate 30. In the present embodiment, the joining holes 31 formed in the central portion are provided at positions sandwiching the center of the reinforcing plate 30 in the vertical direction.

[0023] As shown in FIG. 7, the plurality of joining holes 31 formed in the outer peripheral portion are arranged along the outer peripheral portion of the reinforcing plate 30. Further, the joining holes 31 are formed such that the reinforcing plate 30 is joined to the beam 12 by the same number of joining members (not shown) at each end portion 17A of the reinforcing plate 30 in the longitudinal direction of the beam 12 and at each end portion 17B of the reinforcing plate 30 in the vertical direction. In the present embodiment, the reinforcing plate 30 is joined to the beam 12 by 14 joining members at each of the end portions 17A and 17B.

[0024] (Construction method) An example of the construction method of the connection structure 10 (see FIG. 1) of the wooden structure described above will be described. In the present embodiment, for example, outside the construction site such as a factory, a first step which is a pre-connection step of the column 11 and a second step which is a pre-connection step of the beam 12 are performed. Thereafter, a third step of connecting the column 11 and the beam 12 is performed at the construction site.

[0025] In the first step, as shown in FIG. 2, after forming the through hole 13 in the column 11, the first support plate 16 and the second support plate 17 are joined inside the through hole 13. In the second step, as shown in FIG. 3, the third support plate 20 and the pressing portion 21 are provided on the beam 12, and the reinforcing plate 30 is joined.

[0026] In the third step, after inserting the beam 12 into the through hole 13 of the column 11 installed at a predetermined position, alignment between the column 11 and the beam 12 is performed. Then, as shown in FIGS. 5(a) and 5(b), by appropriately rotating each of the hexagonal bolt 23 and the hexagonal nut 24, the first pressing plate 16 and the third pressing plate 20 are pressed by the pressing portion 21 so as to be separated from each other. Thereby, the column 11 and the beam 12 are connected by the connecting portion 15 (see FIG. 1).

[0027] As shown in FIG. 8, when the column 11 and the beam 12 are in a connected state, the lower end surface 30b of the reinforcing plate 30 that is flush with the lower surface 12b of the beam 12 (see FIG. 6) abuts against the second pressing plate 17. That is, the column 11 and the beam 12 are connected in a state where the reinforcing plate 30 abuts against the second pressing plate 17 and the third pressing plate 20 in the vertical direction.

[0028] The operation and effect of this embodiment will be described. (1) According to the connection structure 10 of the wooden structure, the side surface of the portion of the beam 12 disposed inside the through hole 13 is reinforced by the steel reinforcing plate 30. Thereby, the load-bearing capacity of the beam 12 can be increased at the connection portion with the column 11.

[0029] (2) According to the connection structure 10 of the wooden structure, when connecting the column 11 and the beam 12, it is only necessary to operate the pressing portion 21 after passing the beam 12 through the through hole 13 of the column 11, so the construction is easy.

[0030] (3) According to the connection structure 10 of the wooden structure, the column 11 and the beam 12 can be easily disassembled by releasing the pressing by the pressing portion 21. Further, the column 11 and the beam 12 after disassembly can be reused.

[0031] (4) The reinforcing plate 30 is provided so as to cover the area between the pair of lag screw bolts 22 in the side view of the beam 12. Thereby, while reliably avoiding interference between the lag screw bolts 22 and the joining member, the beam 12 can be reinforced with a larger reinforcing plate 30. Further, since the reinforcing plate 30 is less visible from the outside in the state where the column 11 and the beam 12 are connected, the design property of the connection structure 10 of the wooden structure can be improved.

[0032] (5) The reinforcing plate 30 is joined to the beam 12 at the center portion and the outer peripheral portion of the reinforcing plate 30. Thereby, the beam 12 can be effectively reinforced by the reinforcing plate 30.

[0033] (6) The reinforcing plate 30 is provided so as to abut on the second bearing plate 17 and the third bearing plate 20 in the vertical direction. That is, the reinforcing plate 30 is provided so as to be restrained by the second bearing plate 17 and the third bearing plate 20 in the vertical direction when the column 11 and the beam 12 are in a connected state. Thereby, the reinforcing plate 30 can be effectively used as a resistance when a vertical load acts on the beam 12. As a result, the shear strength of the beam 12 at the connection portion with the column 11 can be further increased.

[0034] (7) The reinforcing plate 30 is joined to the beam 12 with the same number of joining members at each end portion 17A in the longitudinal direction of the beam 12 and each end portion 17B in the height direction of the beam 12. Thereby, the outer peripheral portion of the reinforcing plate 30 can be joined to the beam 12 with a uniform joining strength.

[0035] (8) The second bearing plate 17 has a protruding portion 17a that protrudes from the through hole 13. Thereby, since the contact area between the beam 12 and the second bearing plate 17 becomes large, the shear strength of the beam 12 at the connection portion with the column 11 can be further increased. Further, the indentation of the second bearing plate 17 into the column 11 can be suppressed.

[0036] (9) The third bearing plate 20 has a protruding portion 20a that protrudes from the through hole 13. As a result, the contact area between the beam 12 and the third bearing plate 20 increases, so that the load-bearing capacity of the beam 12 at the connection portion with the column 11 can be further enhanced.

[0037] This embodiment can be implemented with the following modifications. This embodiment and the following modification examples can be implemented in combination with each other within a technically non-conflicting range. · In the connection structure 10 of the wooden structure, the connection portion 15 only needs to be able to press the first bearing plate 16 and the beam 12 so as to be separated from each other inside the through hole 13. That is, the connection portion 15 may be constituted by, for example, the first bearing plate 16 and a pressing portion 21 constituted by a lag screw bolt 22 and a hexagon bolt 23. Also, for example, the pressing portion 21 may be constituted by a wedge material or the like disposed between the first bearing plate 16 and the beam 12 after the beam 12 is inserted into the through hole 13. In this case, from the viewpoint of preventing the wedge material from sinking into the beam 12, it is preferable that the third bearing plate 20 is provided on the beam 12.

[0038] · The reinforcing plate 30 is joined to the beam 12 at both the central portion and the outer peripheral portion, but the joining position can be changed. For example, the reinforcing plate 30 may have a configuration in which the central portion is joined to the beam 12, or a configuration in which the outer peripheral portion is joined to the beam 12. Also, for example, the joining position of the reinforcing plate 30 may be determined based on the results of various simulations and various experiments.

[0039] · The reinforcing plate 30 is provided so as to cover the entire region between the lag screw bolts 22 in the longitudinal direction of the beam 12. Not limited to this, the reinforcing plate 30 may be provided so as to cover a part of the region between the lag screw bolts 22, or may be provided so as to cover the entire side surface of the portion disposed inside the through hole 13.

[0040] · In the above-described embodiment, the connection structure 10 of the wooden structure has been described with the column 11 as the vertical member and the beam 12 as the horizontal member. However, the vertical and horizontal members are not limited to the column 11 and the beam 12.

Explanation of Reference Numerals

[0041] 10... connection structure, 11... column as vertical member, 12... beam as horizontal member, 12a... upper surface, 12b... lower surface, 13... through hole, 13a... upper inner surface, 13b... lower inner surface, 15... connection portion, 16... first pressure plate, 17... second pressure plate, 17a... protruding portion, 20... third pressure plate, 20a... protruding portion, 21... pressing portion, 22... lag screw bolt, 23... hexagon bolt, 24... hexagon nut, 25... female screw portion, 26... insertion hole, 30... reinforcement plate, 30a... upper end surface, 30b... lower end surface, 31... joining hole.

Claims

1. A connection structure for a wooden frame structure that connects a wooden vertical member having a through hole formed with upper and lower inner surfaces facing each other in the vertical direction and a wooden horizontal member passing through the through hole, a support pressure plate provided on one of the upper inner surface and the lower inner surface, and a pressing portion that presses the support pressure plate and the horizontal member so as to be separated from each other inside the through hole, wherein a reinforcing plate is joined to a surface of the horizontal member facing the inner side surface of the through hole Connection structure of a wooden frame structure.

2. The pressing portion has at least a pair of lag screw bolts in the longitudinal direction of the horizontal member, the pair of lag screw bolts are each embedded so as to extend in the vertical direction inside the horizontal member and have female screw portions into which bolt members for pressing the support pressure plate are screwed, and the reinforcing plate is provided so as to cover a region between the pair of lag screw bolts in a side view of the horizontal member The connection structure of the wooden frame structure according to claim 1.

3. The reinforcing plate is joined to the horizontal member at the center portion and the outer peripheral portion of the reinforcing plate The connection structure of the wooden frame structure according to claim 2.

4. The support pressure plate is a first support pressure plate, The connection structure is, a second support pressure plate provided on the other of the upper inner surface and the lower inner surface and pressed by the pressing portion against the horizontal member, and a third support pressure plate provided on the horizontal member so as to face the first support pressure plate and pressed by the pressing portion against the horizontal member, wherein the reinforcing plate is provided so as to contact the second support pressure plate and the third support pressure plate in the vertical direction The connection structure of the wooden frame structure according to any one of claims 1 to 3.

5. A connection method for a wooden frame structure that connects a wooden vertical member having a through hole formed with upper and lower inner surfaces facing each other in the vertical direction and a wooden horizontal member passing through the through hole, a first step of providing a support pressure plate on the upper inner surface or the lower inner surface, a second step of joining a reinforcing plate to a surface of the horizontal member facing the inner side surface of the through hole, and a third step of inserting the horizontal member into the through hole after completion of the first step and the second step and pressing the support pressure plate and the horizontal member with a pressing portion so as to be separated from each other inside the through hole Connection method of a wooden frame structure.

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