Roller bearing structure in wooden frame

Abstract

To realize roller bearings as a structure for joints in wooden frames.SOLUTION: A roller bearing structure in a wooden frame comprises a first member at least partially formed of wooden material, a second member at least partially formed of wooden material and facing the first member in an up-and-down direction, and a support member. The support member is attached to the second member and is configured to contact the first member to support a vertical load while allowing relative displacement in a horizontal direction between the first member and the second member.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The technology disclosed in this specification relates to a roller bearing structure for a wooden frame. [Background technology]

[0002] 2. Description of the Related Art Known examples of joint structures for wooden frames made of wooden members include rigid joints and pin joints (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] A roller bearing is sometimes required as a joint structure for wooden structures to relieve stress caused by deformation of the structure. Conventionally, no roller bearing structure has been proposed as a joint structure for wooden structures.

[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) The roller bearing structure for a wooden frame disclosed in this specification comprises a first member at least partially made of a wood material, a second member at least partially made of a wood material and facing the first member in the vertical direction, and a support member. The support member is attached to the second member and configured to abut against the first member to support a vertical load while allowing relative horizontal displacement between the first member and the second member.

[0008] According to this roller bearing structure, it is possible to realize roller bearings as a structure for joints of wooden frames. This makes it possible to suppress horizontal forces from occurring at the joints due to large deformations of the frame, and improves the degree of freedom in frame design.

[0009] (2) In the above roller bearing structure, a recess may be formed in the first member, and at least a portion of the support member may be disposed in the recess. With this configuration, at least a portion of the support member can be prevented from being exposed to the outside world, thereby improving the aesthetic appearance.

[0010] (3) In the above roller bearing structure, the recess may extend in a first horizontal direction, and the support member may be configured to allow relative displacement between the first member and the second member in the first direction, but not allow relative displacement between the first member and the second member in another horizontal direction. With this configuration, a roller bearing that allows relative displacement between the first member and the second member only along one horizontal direction can be realized as a joint structure for a wooden frame.

[0011] (4) In the roller bearing structure, the support member may be made of steel. With this configuration, a roller bearing with relatively low friction can be realized.

[0012] (5) In the roller bearing structure, the first member may have a wooden member and a steel member attached to the wooden member and in contact with the support member. With this configuration, a roller bearing with even lower friction can be realized.

[0013] The technology disclosed in this specification can be realized in various forms, such as a roller bearing structure for a wooden frame, a wooden frame or building having the roller bearing structure, a manufacturing method or construction method thereof, etc. [Brief description of the drawings]

[0014] [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 a cross-sectional configuration of a joint 140 between a wooden diagonal beam 80 and a wooden beam 20. [Diagram 3] FIG. 3 is an explanatory diagram showing a cross-sectional configuration of a joint 140 taken along the line III-III in FIG. 2; [Figure 4] FIG. 4 is an explanatory diagram showing a planar configuration of a joint 140 taken along the line IV-IV in FIG. 2; [Diagram 5] FIG. 3 is an explanatory diagram showing a planar configuration of the joint 140 at the position VV in FIG. 2; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] 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."

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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. A frame structure formed by wooden columns and wooden beams is an example of a wooden frame structure.

[0020] 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.

[0021] 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.

[0022] 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 between the wooden columns 10 and the wooden beams 20 is a moment-resisting joint having rotational rigidity. The building 100 of this embodiment also has wooden diagonal beams 80 that extend obliquely relative to the horizontal plane as wooden beams, and has joints 140 between the wooden diagonal beams 80 and the wooden beams 20 that extend in the horizontal direction. Below, a roller support structure 140A of each joint 140 between the wooden diagonal beams 80 and the wooden beams 20 will be described.

[0023] Figure 2 is an explanatory diagram showing the cross-sectional structure of the joint 140 between the wooden diagonal beam 80 and the wooden beam 20, Figure 3 is an explanatory diagram showing the cross-sectional structure of the joint 140 at the position III-III in Figure 2, Figure 4 is an explanatory diagram showing the planar structure of the joint 140 at the position IV-IV in Figure 2, and Figure 5 is an explanatory diagram showing the planar structure of the joint 140 at the position VV in Figure 2.

[0024] In this embodiment, the joint 140 between the wooden diagonal beam 80 and the wooden beam 20 has a roller bearing structure 140A. The roller bearing structure 140A is a bearing structure that supports a load in the vertical direction while allowing relative displacement between two members in the horizontal direction. The roller bearing structure 140A includes the wooden beam 20, the wooden diagonal beam 80, and a support member 141.

[0025] The wooden beam 20 and the wooden diagonal beam 80 face each other in the up-down direction. In this embodiment, the wooden diagonal beam 80 is located above the wooden beam 20. The wooden beam 20 extends in the X-axis direction, and the horizontal projection of the wooden diagonal beam 80 also extends in the X-axis direction. In this specification, the extension direction of the horizontal projection of the wooden diagonal beam 80 is simply referred to as the extension direction of the wooden diagonal beam 80. The wooden beam 20 is an example of a second member.

[0026] A recess 82 is formed on the lower surface 81 of the wooden diagonal beam 80. The recess 82 extends horizontally. In this embodiment, the recess 82 extends in the extension direction (X-axis direction) of the wooden diagonal beam 80 and the wooden beam 20. The cross-sectional shape of the recess 82 is a constant, approximately rectangular shape over its entire length. The X-axis direction is an example of a first direction.

[0027] A plate member 83 is fixed to the bottom surface (upper surface) of a recess 82 formed in the wooden diagonal beam 80. The plate member 83 is, for example, a steel plate having a thickness of 9 mm. The width of the plate member 83 is, for example, about 80 mm, and the length of the plate member 83 is, for example, about 450 mm. In this embodiment, the planar shape of the plate member 83 is substantially the same as the shape of the bottom surface of the recess 82 formed in the wooden diagonal beam 80. The plate member 83 is fixed by, for example, four screws 84. In this specification, the wooden diagonal beam 80 to which the plate member 83 is attached is also simply referred to as the wooden diagonal beam 80. The wooden diagonal beam 80 is an example of a first member and a wooden member, and the plate member 83 is an example of a steel member.

[0028] The support member 141 has a flat plate portion 143 and a protruding portion 142. The flat plate portion 143 is made of a steel plate having a thickness of, for example, 9 mm. The width of the flat plate portion 143 is, for example, about 100 mm, and the length of the flat plate portion 143 is, for example, about 350 mm. The protruding portion 142 is a portion protruding upward from the flat plate portion 143. The protruding portion 142 is made of, for example, channel steel (C-75×40×5×7, etc.). The length of the protruding portion 142 in the extension direction (X-axis direction) is, for example, about 250 mm. The protruding portion 142 is joined to the flat plate portion 143 by, for example, welding. The support member 141 is fixed to the upper surface 21 of the wooden beam 20 by, for example, four screws 144 driven into the flat plate portion 143.

[0029] The shape and position of the recess 82 of the wooden diagonal beam 80 and the shape and position of the support member 141 are set in relation to each other. Specifically, their shape and position are set so that at least a part of the support member 141 is disposed in the recess 82. At this time, the upper surface of the protrusion 142 of the support member 141 abuts against the lower surface of the plate member 83 fixed to the recess 82 of the wooden diagonal beam 80. This ensures a clearance CL1 of a predetermined size (e.g., 15 mm) between the lower surface 81 of the wooden diagonal beam 80 and the upper surface 21 of the wooden beam 20.

[0030] In addition, in the recess 82 of the wooden diagonal beam 80, a clearance CL2 of a predetermined size (e.g., 2.5 mm) is secured on both sides of the protrusion 142 of the support member 141. Furthermore, in the recess 82, a space SP of a predetermined size (e.g., about 100 mm) is secured in front of and behind the protrusion 142 of the support member 141 in the extension direction (X-axis direction).

[0031] The support member 141 thus configured supports the vertical load acting through the diagonal wooden beam 80 while allowing relative displacement along the X-axis direction between the diagonal wooden beam 80 and the wooden beam 20. Note that the support member 141 does not allow relative displacement between the diagonal wooden beam 80 and the wooden beam 20 in horizontal directions other than the X-axis direction due to interference with the inner peripheral surface of the recess 82 of the diagonal wooden beam 80.

[0032] As described above, the roller bearing structure 140A of the joint 140 between the wooden beam 20 and the wooden diagonal beam 80 in the building 100 of this embodiment includes the wooden diagonal beam 80 to which the plate member 83 is attached, the wooden beam 20 facing the wooden diagonal beam 80 in the vertical direction, and the support member 141 attached to the wooden beam 20. The support member 141 is configured to abut against the wooden diagonal beam 80 to support a vertical load while allowing relative horizontal displacement between the wooden diagonal beam 80 and the wooden beam 20. Therefore, according to the roller bearing structure 140A of this embodiment, a roller bearing can be realized as a structure of the joint of the wooden frame. This makes it possible to suppress the generation of horizontal force at the joint due to large deformation of the frame, and improve the degree of freedom in frame design.

[0033] In addition, in the roller bearing structure 140A of this embodiment, a recess 82 is formed in the wooden diagonal beam 80, and at least a part of the support member 141 is disposed in the recess 82. Therefore, according to the roller bearing structure 140A of this embodiment, at least a part of the support member 141 can be prevented from being exposed from the outside, improving the aesthetic appearance.

[0034] In the roller bearing structure 140A of this embodiment, the recess 82 formed in the diagonal wooden beam 80 extends in the horizontal X-axis direction, and the support member 141 is configured to allow relative displacement between the diagonal wooden beam 80 and the wooden beam 20 in the X-axis direction, but not to allow relative displacement between the diagonal wooden beam 80 and the wooden beam 20 in other horizontal directions. Therefore, according to the roller bearing structure 140A of this embodiment, a roller bearing that allows relative displacement between the diagonal wooden beam 80 and the wooden beam 20 along only one horizontal direction can be realized as a joint structure for a wooden frame.

[0035] Furthermore, in the roller bearing structure 140A of this embodiment, the support member 141 is made of steel. Therefore, according to the roller bearing structure 140A of this embodiment, a roller bearing with relatively low friction can be realized.

[0036] In addition, in the roller bearing structure 140A of this embodiment, a steel plate member 83 that abuts against the support member 141 is attached to the wooden diagonal beam 80. Therefore, according to the roller bearing structure 140A of this embodiment, a roller bearing with even lower friction can be realized.

[0037] 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.

[0038] The configurations of the building 100 and the roller bearing structure 140A in the above embodiment are merely examples and can be modified in various ways. For example, in the above embodiment, at least a part of the support member 141 is disposed in the recess 82, but the entire support member 141 does not have to be disposed in the recess 82.

[0039] In the above embodiment, the material and size of each member are merely an example and can be modified in various ways. For example, in the above embodiment, the plate member 83 and the support member 141 are made of steel, but the plate member 83 and / or the support member 141 may be made of other materials. In this case, the plate member 83 and / or the support member 141 are preferably made of a material with a relatively small friction coefficient, such as a material treated with tetrafluoroethylene. Also, the plate member 83 may be omitted. [Explanation of symbols]

[0040] 10: Wooden column 20: Wooden beam 21: Top surface 80: Wooden diagonal beam 81: Bottom surface 82: Recess 83: Plate member 84: Screw 90: Foundation 100: Building 101: Floor surface 102: Joist material 103: Floor material 140: Joint 140A: Roller bearing structure 141: Support member 142: Convex portion 143: Flat plate portion 144: Screw

Claims

1. A roller bearing structure for a wooden frame, A first member at least partially made of a wood material; a second member at least a portion of which is made of a wood material and which faces the first member in the up-down direction; a support member attached to the second member and configured to abut against the first member to support a vertical load while allowing horizontal relative displacement between the first member and the second member; A roller bearing structure comprising:

2. 2. The roller bearing structure according to claim 1, The first member has a recess formed therein, At least a portion of the support member is disposed within the recess.

3. 3. The roller bearing structure according to claim 2, The recess extends in a horizontal first direction; A roller bearing structure, wherein the support member is configured to allow relative displacement between the first member and the second member in the first direction, while not allowing relative displacement between the first member and the second member in another horizontal direction.

4. A roller bearing structure according to any one of claims 1 to 3, The support member is made of steel.

5. 5. The roller bearing structure according to claim 4, The first member includes: Wood materials and A steel member attached to the wood member and abutting against the support member; A roller bearing structure having

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