Wooden shaft assembly structure

Abstract

To provide a wooden framework having a wooden panel connected to a frame in a column-exposed style and capable of reducing both material cost and connection labor for a connector.SOLUTION: A wooden framework 100 is formed by a frame 90 including a wooden pole 10 and a wooden beam 20 or a foundation 30, a wooden panel 40 is arranged in a column-exposed style at the frame 90, and the wooden panel 40 is fixed to the pole 10 with a shaft-like fixing member 50 penetrating the pole 10 from a lateral surface 12 of the pole 10 at the outer side in an in-plane direction of the frame 90 and leading to the inside of the wooden panel 40.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a wooden frame structure. [Background technology]

[0002] In wooden frame construction using the wooden frame method, the frame is made up of wooden columns and wooden beams or foundations, and wooden panels such as structural plywood are typically used as shear walls, joined with nails or braces. When using thick wooden panels such as CLT (Cross Laminated Timber) for these shear walls, a large-wall construction would result in the wall thickness of the frame becoming unnecessarily large, which is uneconomical. Therefore, wooden panels are placed inside the frame in a solid-wall construction so that they fit within the width of the columns and beams of the frame.

[0003] When joining a frame and a wooden panel in this solid wall style, a commonly used method is to attach a steel plate with a pin hole to a wooden shaft member such as a beam or pillar, create a groove at the end of the wooden panel to accommodate the steel plate, and then abut the wooden shaft member and the wooden panel while accommodating the steel plate in the groove.After that, insert connecting hardware such as a bolt or screw from the outside of the wooden shaft member and pass the connecting hardware through the pin hole to join them.

[0004] More specifically, the steel plate is a steel plate unit in which a steel plate (for example, a first steel plate) fixed to the side of the wooden shaft member and a steel plate (for example, a second steel plate) accommodated in the accommodation groove of the wooden panel are joined together by welding or the like, and the first steel plate is connected to the wooden shaft member, and the second steel plate is connected to the wooden panel using unique connecting hardware. In other words, when connecting a wooden panel to a frame in a solid wall format, a steel plate unit is required instead of a single steel plate, and two types of connecting hardware are also required, so the material cost and effort required for these connecting devices become issues.

[0005] For these reasons, there is a need for technology that can reduce both the material costs and the labor required for connecting parts in wooden frame structures in which wooden panels are connected to the frame in a solid wall format.

[0006] Patent Document 1 proposes a CLT structure. The CLT structure includes a concrete foundation with horizontally extending reinforcing members, a wall panel made of laminated and glued planks with a longitudinal slit formed in its lower end, a joint plate partially embedded in the foundation, with at least a portion of its flat joint plate protruding upward from the top surface of the foundation, and a connecting member consisting of a drift pin that connects the joint plate to the wall panel when the joint plate protruding from the top surface of the foundation is inserted into the slit in the wall panel. The joint plate is positioned above the reinforcing members with its longitudinal direction aligned with the extension of the reinforcing members. The joint plate has a joint plate, a flange embedded in the foundation and extending from the joint plate in a direction intersecting the vertical direction, and an anchor embedded in the foundation and extending downward from the flange, with its lower end positioned below the reinforcing members. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2020-172743 Summary of the Invention [Problem to be solved by the invention]

[0008] Even in the CLT structure described in Patent Document 1, when connecting the wall panels to the foundation, connecting fittings consisting of a joining plate portion and a flange portion are required, and two types of connecting fittings, namely, drift pins and anchor members, are still required.

[0009] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a wooden frame structure in which wooden panels are connected to the frame in a solid wall format, which can reduce both the material costs required for connectors and the effort required for connection. [Means for solving the problem]

[0010] In order to achieve the above object, one aspect of the wooden frame structure according to the present invention is as follows: A wooden frame structure formed by a frame including wooden columns and wooden beams or foundations, The frame is characterized in that wooden panels are arranged in a solid wall format, and the wooden panels are fixed to the columns by axial fixing members that pass through the columns from the outer side of the column in the in-plane direction of the frame and lead to the inside of the wooden panels.

[0011] According to this aspect, in a wooden frame structure in which wood panels are arranged in a solid wall configuration, the wood panels are fixed to the columns with axial fixing members that penetrate the columns from the outer side of the frame in the in-plane direction and lead to the interior of the wood panels. This eliminates the need for steel plate units in which multiple steel plates are welded together, and since the columns and wood panels that make up the frame are fixed with a single type of axial fixing member, both the material costs and the connection labor required for connectors can be reduced. Here, bolts, screws, nails, drift pins, etc. can be used as axial fixing members. Furthermore, structural plywood, laminated lumber (material in which multiple pieces of lumber are fixed with adhesives, screws, etc.), CLT panels, etc. can be used as wood panels.

[0012] Another aspect of the wooden framework according to the present invention is as follows: The pillar is provided with a through hole, An axial groove is provided from the end of the wood panel to the inside, The through hole and the shaft-shaped groove are positioned to form a communication hole, and the shaft-shaped fixing member is inserted into the communication hole and driven in to be fixed.

[0013] According to this aspect, a through hole pre-installed in the pillar and an axial groove pre-installed in the wood panel are positioned relative to each other to form a communicating hole, and an axial fixing member is inserted into the communicating hole and hammered in and fixed, thereby allowing the axial fixing member to be hammered in highly accurately and efficiently at the desired hammering position.

[0014] Another aspect of the wooden framework according to the present invention is as follows: The wood panel is characterized in that it is fixed to the pillars on the left and right sides of the wood panel by the shaft-shaped fixing members, respectively.

[0015] According to this aspect, the wood panel is fixed to the pillars on the left and right of the wood panel, so that the fixing strength of the wood panel, which is fixed only to the pillars that make up the frame, can be increased.

[0016] Another aspect of the wooden framework according to the present invention is as follows: A first shear plate is embedded in the wood panel, and a portion of the first shear plate faces the interface between the wood panel and the column, The shaft-shaped fixing member penetrates the first shear plate.

[0017] According to this aspect, the first shear plate is embedded in the wood panel facing the interface between the wood panel and the column, and the axial fixing member penetrates the first shear plate to connect the column and the wood panel, thereby improving the shear strength of the axial fixing member and reducing the number of axial fixing members required. Although it is conceivable to embed this first shear plate in either the wood panel or the column, it is preferable to embed it in the wood panel because wood panels are generally softer than columns.

[0018] Another aspect of the wooden framework according to the present invention is as follows: A second shear plate is embedded in the column, and a portion of the second shear plate faces the interface between the column and the wood panel; The shaft-shaped fixing member penetrates both the second shear plate and the first shear plate.

[0019] According to this aspect, in addition to embedding the first shear plate in the wood panel, the second shear plate is embedded in the column, and the first and second shear plates abut at the interface between the column and the wood panel. The axial fixing member penetrates the first and second shear plates to connect the column and the wood panel. This further improves the shear strength of the axial fixing member and makes it possible to further reduce the number of axial fixing members required.

[0020] Another aspect of the wooden framework according to the present invention is as follows: The shaft-shaped fixing member is a drift pin.

[0021] According to this aspect, the axial fixing member is a drift pin, which increases the connection strength between the pillar and the wood panel. Furthermore, a drift pin is suitable as an axial fixing member that is inserted into and fixed to a communicating hole formed by positioning a through hole pre-made in the pillar and an axial groove pre-made in the wood panel relative to each other.

[0022] In another aspect of the wooden frame structure according to the present invention, The wooden panel and the beam or the base are fixed together by a tenon pipe.

[0023] According to this aspect, the wooden panel and the beam or base are fixed by the tenon pipe, so that the shear force generated in the wooden panel can be borne by the tenon pipe.

[0024] Another aspect of the wooden framework according to the present invention is as follows: The wood panel is characterized in that it is a CLT panel.

[0025] According to this aspect, since the wooden panels are CLT panels, a wide range of panels, for example up to 12m x 2.6m in length and width, can be applied, minimizing the number of panel joints on-site. This improves the strength of wooden frameworks and construction efficiency. Furthermore, since CLT panels are made by stacking multiple boards with their fibers crossed (orthogonal), they are resistant to deformation and are suitable for use as load-bearing walls.

[0026] In another aspect of the wooden frame structure according to the present invention, The front view shape of the wood panel is rectangular, The four corners of the rectangle are cut out.

[0027] According to this aspect, the four corners of the rectangular wooden panel when viewed from the front are cut out, so that when the wooden frame structure is deformed during an earthquake, the corners of the wooden panel come into contact with beams, foundations, etc., and the compressive force caused by pressing against each other prevents the load from increasing. [Effects of the Invention]

[0028] As can be understood from the above explanation, the wooden frame structure of the present invention can reduce both the material costs and the effort required for connecting devices in a wooden frame structure in which wood panels are connected to the frame in a solid wall format. [Brief explanation of the drawings]

[0029] [Figure 1] 1 is a front view showing an example of a wooden framework structure according to a first embodiment. FIG. [Figure 2] 2 is a view taken along the line II-II in FIG. 1, illustrating the state in which the pillar and the wood panel are fixed by the shaft-shaped fixing member. [Figure 3] 10(a) and 10(b) are both diagrams illustrating a state in which a shear plate is provided at the interface between the pillar and the wood panel, and an axial fixing member fixes both of them. [Figure 4] FIG. 1 is a perspective view of an example shear plate. [Figure 5]FIG. 1 is a structural model diagram of an example of a wooden framework structure according to the first embodiment. [Figure 6] FIG. 10 is a front view showing an example of a wooden framework structure according to a second embodiment. [Figure 7] FIG. 10 is a structural model diagram of an example of a wooden framework structure according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0030] An example of a wooden frame structure according to each embodiment will be described below with reference to the accompanying drawings. In this specification and drawings, substantially identical components will be designated by the same reference numerals to avoid redundant description.

[0031] [Wooden frame structure according to the first embodiment] First, an example of a wooden frame structure according to the first embodiment will be described with reference to Figures 1 to 5. Here, Figure 1 is a front view showing an example of a wooden frame structure according to the first embodiment, and Figure 2 is a view taken along the line II-II in Figure 1, illustrating how the pillars and wooden panels are fixed by shaft-shaped fixing members.

[0032] The wooden framework 100 is formed by a framework 90 including wooden columns 10, wooden beams 20, and a foundation 30, and wooden panels 40 are arranged in a solid wall style on the framework 90. ​​Here, the illustrated example shows the framework 90 for the first floor of a building, but when the framework is for the upper floors of a two-story or higher building, the framework is formed by left and right columns and top and bottom beams.

[0033] The wood panel 40 is fixed to the left and right columns 10 with its left and right side surfaces 41 abutting against the columns 10 on the left and right, its top surface 42 abutting against the beams 20, and its bottom surface 43 abutting against the base 30. More specifically, the wood panel 40 is fixed to the columns 10 with drift pins 50 (an example of shaft-shaped fixing members) that pass through the columns 10 and lead into the interior of the wood panel 40 from the outer side surface 12 of the columns 10 in the in-plane direction of the frame 90.

[0034] The wooden panel 40 has a rectangular shape when viewed from the front, with a height of h and a width of d. Structural plywood, laminated lumber, CLT panels, etc. can be used for the wooden panel 40, but CLT panels are preferred because they can be used in a wide range of panels up to 12 m x 2.6 m in length and width and can minimize the number of connection points between panels on site, which leads to improved strength of the wooden frame structure 100 and improved construction efficiency.

[0035] The center distance D between the left and right pillars 10 is available in a variety of forms ranging from 0.5 m to 2.0 m, and examples thereof include forms of 0.5 m, 0.75 m, 1.0 m, 1.5 m, and 2.0 m.

[0036] Notches 44 are provided at the four corners of the wooden panel 40. When a horizontal force F acts on the wooden frame structure 100 during an earthquake and causes deformation, these notches 44 prevent the corners of the wooden panel 40 from coming into contact with the left and right columns 10, beams 20, and foundations 30, and from increasing the load due to the compressive force caused by mutual pressing.

[0037] 1, the height h1 of the cutout 44 is set to d / 30 (1 / 30 radians) where d is the width of the wood panel 40. According to the inventors' experience, by setting the cutout 44 to 1 / 30 radians, when the frame 90 is deformed during an earthquake, the corners of the wood panel 40 will not come into contact with the beams 20 or foundation 30, and this experience is the basis for the design.

[0038] In addition, the length of the central region of the upper surface 42 and lower surface 43 of the wood panel 40, excluding the left and right cutouts 44, is set to d / 2 (the length of the cutouts 44 is set so that the length of the central region is d / 2).

[0039] As shown in Figure 2, a through hole 15 is provided in the pillar 10, and an axial groove 45 is provided from the end of the wood panel 40 to the inside, and the through hole 15 and the axial groove 45 are positioned to form a communicating hole 18. Here, the lengths of the through hole 15 and the axial groove 45 are set to be the same or approximately the same.

[0040] A drift pin 50 is inserted into the communication hole 18 and is driven in and fixed.

[0041] As shown in Figure 1, the left and right pillars 10 and the wood panel 40 are fixed together by a plurality of drift pins 50. The number of drift pins 50 on each side of the wood panel 40 can be determined using the following two formulas.

[0042] Specifically, the yield strength Py of the joint between the CLT panel and the column in the wooden frame structure 100 when a horizontal force F acts during an earthquake can be expressed by the following formula (1).

[0043]

number

[0044] In equation (1), ny × py corresponds to the shear yield strength Qy of all the drift pins in Figure 1.

[0045] On the other hand, in the seismic performance of wooden buildings, the inter-story deformation angle during an earthquake is generally set at 1 / 150, so the rigidity of the joint between the CLT panel and the column, P 150 can be expressed by the following equation (2).

[0046]

number

[0047] The required number of drift pins 50 is set by taking the smaller of the above formulas (1) and (2) as the design strength.

[0048] Figures 3(a) and (b) show a joint configuration that improves the shear strength at the interface between the column 10 and the wood panel 40. Both Figures 3(a) and (b) are diagrams that explain the state in which a shear plate is provided at the interface between the column and the wood panel, and an axial fixing member fixes both of them.

[0049] In the configuration shown in FIG. 3(a), a first shear plate 55A (shear plate 55) is embedded in a wood panel 40, and the first shear plate 55A faces the side surface 41 of the wood panel 40 (the interface with the pillar 10).

[0050] 4, the shear plate 55 has a disk 55a with pin holes 55c and a cylindrical wall 55b that stands along the outline of the disk 55a. The cylindrical wall 55b is embedded inside the wood panel 40, and the back surface of the disk 55a faces the interface with the column 10. The drift pins 50 penetrate the pin holes 55c and are embedded inside the wood panel 40.

[0051] 3(b), in addition to the first shear plate 55A embedded in the wood panel 40, a separate second shear plate 55B (shear plate 55) is embedded in the column 10, and the disk 55a of the second shear plate 55B also faces the interface with the wood panel 40, with the back surfaces of the disks 55a of the first shear plate 55A and the second shear plate 55B abutting against each other at the interface. Drift pins 50 pass through the pin holes 55c of both disks 55a and are embedded inside the wood panel 40.

[0052] In either of the configurations shown in Figures 3(a) and (b), the use of one or two shear plates 55 improves the shear strength of the interface between the column 10 and the wood panel 40, making it possible to reduce the number of drift pins 50 required for design calculations.

[0053] Here, the inventors have conducted verification experiments to determine the load capacity per drift pin in a configuration reinforced with one shear plate 55 as shown in FIG. 3(a) and a configuration reinforced with two shear plates 55 as shown in FIG. 3(b).

[0054] As a result, in the configuration of FIG. 3(a), the maximum load capacity reaches about 12 kN when the drift pin is displaced about 5 mm, and then plastic deformation occurs.

[0055] On the other hand, in the configuration shown in Figure 3(b), the maximum load capacity is about 15 kN when the drift pin is displaced about 10 mm, and then plastic deformation occurs.

[0056] That is, doubling the number of shear plates 55 only increases the load capacity by about 1.3 times, so from the viewpoint of cost-effectiveness, a form in which reinforcement is performed with one shear plate 55 is desirable.

[0057] Furthermore, since the wood panel 40 is generally softer than the pillar 10, when one shear plate 55 is provided at the interface, it is preferable to embed the shear plate 55 in the wood panel 40, as shown in Figure 3(a).

[0058] Figure 5 is a diagram showing an example of a structural model of the wooden post-and-beam frame 100 shown in Figure 1. In the structural model M1, the joints (joints) of the column C to the beam B1 or foundation B2 can be joints such as tenons, kama joints, dovetail joints, or joints using metal fittings such as tenon pipes, but all of these are represented by pins P1 in the structural model.

[0059] On the other hand, the connections between the left and right columns C and the wooden panel W using multiple drift pins can be modeled using springs Sp.

[0060] In the wooden frame structure 100 shown in Figure 1, the wooden panel 40 is fixed to the column 10 by a drift pin 50 that penetrates the column 10 from the outer side of the column 10 in the in-plane direction of the frame 90 and leads to the interior of the wooden panel 40. This eliminates the need for connecting jigs such as steel plate units, and since the column 10 and the wooden panel 40 can be fixed with a single type of axial fixing member, both the material cost required for the connecting device and the effort required for connection can be reduced.

[0061] [Wooden frame structure according to the second embodiment] Next, an example of a wooden frame structure according to the second embodiment will be described with reference to Figures 6 and 7. Here, Figure 6 is a front view showing an example of a wooden frame structure according to the second embodiment.

[0062] The wooden frame structure 100A differs from the wooden frame structure 100 in that the wooden panels 40, the beams 20, and the base 30 are fixed together via tenon pipes 60.

[0063] The tenon pipe 60 has a pin hole (not shown), and a pin 65 such as a drift pin is inserted into the pin hole, thereby fixing the tenon pipe 60 to the beam 20 and the base 30, and fixing the beam 20 and the base 30 to the upper surface 42 and lower surface 43 of the wood panel 40.

[0064] In the illustrated example, two tenon pipes 60 are provided on each of the upper surface 42 and the lower surface 43 of the wood panel 40, but the number of tenon pipes 60 is not limited to the illustrated example. In addition, when the diameter of the tenon pipe 60 is φ, the distance d2 between the two tenon pipes 60 is set to 5φ or more, and the distance d1 between the tenon pipe 60 and the cutout 44 is set to 2.5φ or more.

[0065] As shown in Figure 6, by fixing the upper and lower surfaces of the wood panel 40 to the beam 20 and the base 30 with a mortise and tenon pipe 60, the shear force S acting on the interface between the wood panel 40 and the beam 20, etc. when the frame 90 is deformed during an earthquake can be borne by the mortise and tenon pipe 60.

[0066] 7 is a diagram showing an example of a structural model of a wooden post-and-beam frame 100A. A structural model M2 can be formed by adding a pin P2, which is a model of a tenon pipe, to the structural model M1 shown in FIG.

[0067] It should be noted that the present invention is not limited to the configurations shown here, and other embodiments may be possible in which other components are combined with the configurations described in the above embodiments. In this regard, the present invention can be modified within the scope of the present invention, and can be appropriately determined depending on the application form. [Explanation of symbols]

[0068] 10: Pillar 11: Side 12: Side (outer side in the in-plane direction) 15:Through hole 18:Communication hole 20: Beam 30: Base 40: Wood panel (CLT panel) 41: Side 42:Top surface 43: Bottom surface 44: Notch 45: Axial groove 50: Axial fixing member (drift pin) 55: Shear Plate 55A: First shear plate 55B: Second shear plate 55a:Disc 55b: Cylinder wall 55c: pinhole 60: Mortise pipe 65: Pin 90: Frame 100,100A: Wooden frame structure F: Horizontal force Py: Yield strength Qy: Shear yield strength S: Shear force M1, M2: Structural models

Claims

1. A wooden frame structure formed by a frame including wooden columns and wooden beams or foundations, The frame has wood panels arranged in a solid wall format, and the wood panels are fixed to the columns by axial fixing members that pass through the columns from the outer side surfaces of the columns in the in-plane direction of the frame and lead to the interior of the wood panels; A first shear plate is embedded in the wood panel, and a portion of the first shear plate faces the interface between the wood panel and the column. A wooden frame structure, characterized in that the shaft-shaped fixing member penetrates the first shear plate.

2. The pillar is provided with a through hole, An axial groove is provided from the end of the wood panel to the inside, The wooden frame structure described in claim 1, characterized in that the through hole and the axial groove are positioned to form a communicating hole, and the axial fixing member is inserted into the communicating hole and driven in to be fixed.

3. 3. The wooden frame structure according to claim 1, wherein the wooden panel is fixed to the columns on the left and right of the wooden panel by the shaft-shaped fixing members.

4. A second shear plate is embedded in the column, and a portion of the second shear plate faces the interface between the column and the wood panel; 4. The wooden frame structure according to claim 1, wherein the shaft-shaped fixing member penetrates both the second shear plate and the first shear plate.

5. 5. The wooden frame structure according to claim 1, wherein the shaft-shaped fixing member is a drift pin.

6. 6. The wooden frame structure according to claim 1, wherein the wooden panels and the beams or the foundations are fixed together by tenon pipes.

7. The wooden frame structure according to any one of claims 1 to 6, wherein the wood panels are CLT panels.

8. The front view shape of the wood panel is rectangular, The wooden frame structure according to any one of claims 1 to 7, wherein four corners of the rectangle are cut out.

Images