JP2018053499A - Wooden structural material connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wooden structural material connection structure capable of suppressing breakage of a beam or a column caused by a tensile force and facilitating structure analysis.SOLUTION: An upper column 2 is connected at a place of an end surface thereof to a first metal fitting 5A fixed to one surface of a beam 1, and a lower column 3 is connected at a place of an end surface thereof to a second metal fitting 5B fixed to a surface positioned on a side opposed to the surface. The first metal fitting 5A is fixed by two first long screw 6A, and the second metal fitting 5B is fixed by two second long screws 6B. A virtual-line first conical region rotated at a prescribed angle around the axes of the first long screws 6A at the tips of the first long screws 6A and a virtual-line second conical region rotated at a prescribed angle around the axes of the second long screws 6B at the tips of the second long screws 6B overlap each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a connecting structure of wood structure materials for connecting wood structure materials.

  As shown in FIG. 3, in the connecting structure of the beam winch in which the beam 101 is fixed up and down with the beam 100 interposed therebetween, conventionally, a hozo pipe 103 is passed between the beam 100 and each column 101, and The drift pin 104 was driven into the hozo pipe 103 from the side surface of the beam 100 or the column 101. Further, as shown in FIGS. 5 (A) and 5 (B), in the connecting structure of beam winches, in another conventional example, a double-cut bolt 105 is inserted into a hole penetrating from the upper surface to the lower surface of the beam 100. The metal fitting 106 is fixed to the double-sided bolt 105 with a nut 107, the protruding piece 106a of the metal fitting 106 is inserted into the slit 101a formed at the end of the column, and the pin 108 is driven into the protruding piece 106a from the side surface of the column 101. It was a structure.

  In Patent Document 1, a wooden column core material that supports a load, a first burnt-out layer that surrounds the outer periphery of the column core material, and a wooden first burnup layer that surrounds the outer periphery of the first burn-up layer, And a second plate that surrounds the side and bottom surfaces of the beam core material, a connecting plate that is fixed to the column core material and extends outward from the first flame stop layer, a wooden beam core material that supports a load, and A stop layer, a wooden second burn allowance layer surrounding the side surface and the lower surface of the second stop layer, and a connecting plate inserted in the beam length direction of the beam core from the end surface of the beam core. A beam provided with one longitudinal groove, and the connecting plate is inserted into the first longitudinal groove so that the side face of the first flame stop layer faces the end face of the second flame stop layer, and the second flame stop layer. In the state where the side and the lower side of the connecting plate are surrounded by the beam core. Column junction structure having a first coupling member for coupling the plate is disclosed.

JP 2012-219559 A

  However, in the structure shown in FIG. 3, when the column 101 exists at the end of the beam 100 as shown in FIG. 4, when a load is applied to the upper and lower columns 101 in a direction away from the beam 100, There was a risk that the beam 100 would break up and down.

  On the other hand, in the conventional structure shown in FIGS. 5 (A) and 5 (B), when a load is applied to the upper and lower columns 101 in a direction away from the beam 100, the double-cut bolt 105 exclusively bears the load. On the other hand, when a load is applied to the upper and lower columns 101 in the direction in which the beam 100 is compressed, the beam 100 receives the pressing of the metal fitting 106 by the surface, and the metal fitting 106 sinks into the surface of the beam 100. That happens. In such a structure, modeling for analysis is not easy, and in some cases, a large difference may occur between the result obtained by the analysis model and the actual structure.

  In view of the above circumstances, an object of the present invention is to provide a connecting structure of a wooden structure material in which a beam or a column is prevented from being broken by a pulling force and a structure analysis is easily performed.

  In order to solve the above problems, the connection structure of the wood structure material of the present invention is connected to the first metal fitting fixed to one surface of the first wood structure material at the end face side. A fixed connection structure in which the third wood structure material is connected to the second metal fitting fixed to the opposite surface located on the opposite side of the one surface at the end surface side, and disposed on the one surface. The first metal fitting fixed by one or a plurality of first long screws screwed from the one surface, and the second metal fitting arranged on the opposite surface was screwed from the opposite surface A first conical region formed by an imaginary line fixed by one or a plurality of second long screws and rotated at a predetermined angle with respect to the axis of the first long screw at the tip of the first long screw; The tip of the second long screw was rotated at a predetermined angle with respect to the axis of the second long screw. A second conical region, characterized in that the overlap by virtual lines.

  If it is said structure, the said 1st, 2nd metal fitting will be fixed to the said 1st wooden structure material with the said 1st, 2nd long screw, and the 1st cone area and said 1st with the said 1st, 2nd long screw Since the two conical regions overlap as described above, even if the first wooden structural member receives a load that is pulled in the direction of the one surface and the opposite surface, the load is Since it is received by the long screws and transmitted in the wood part between the first and second long screws, the wood part is not easily cracked by the pulling force. Further, when a load for compressing the first wood structure material is received from the direction of the one surface and the opposite surface, this load is also transmitted in the wood portion between the first and second long screws. It is easy to model the analysis, and it is possible to suppress the difference between the result obtained by the analysis model and the actual structure.

  The predetermined angle may be not less than 40 degrees and not more than 50 degrees. According to this, load transmission at the wood portion between the first and second long screws can be accurately performed.

  Further, the length of the overlap in the direction from the one surface to the opposite surface is h / 4 or more h with respect to the width h of the first wooden structure material in the direction from the one surface to the opposite surface. / 2 or less. According to this, load transmission at the wood portion between the first and second long screws can be accurately performed.

  The first long screw and the second long screw may have the same length. According to this, the said overlap can be produced in the center side of the width | variety of a said 1st wooden structure material.

  The first wood structure material may be a beam, and the second wood structure material and the third wood structure material may be columns. Alternatively, the first wood structure material may be a pillar, and the second wood structure material and the third wood structure material may be beams.

  If it is this invention, it will be suppressed that a beam or a column breaks with a tensile force, and there exists an effect that a structure analysis is easy to perform.

It is the schematic perspective view which showed the connection structure of the wooden structure material which concerns on embodiment of this invention. It is explanatory drawing which showed the overlap of the cone area | region by the long screw of the connection structure of FIG. It is the schematic perspective view which showed the connection structure of the conventional wooden structure material. It is explanatory drawing which showed the crack by the connection structure of FIG. It is the schematic perspective view which showed the connection structure of the other conventional wooden structure material.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1, the connection structure of the wood structure material of this embodiment is a 2nd wood structure material on the upper surface (one surface) of the cross-sectional square beam 1 which is a 1st wood structure material, for example. An upper column 2 having a wooden cross-section square is provided, and the lower column 3 of the wooden cross-section quadrangle, which is a third wood structure material, is arranged on the lower surface (opposite surface) of the beam 1 so that the central axis thereof coincides with the upper column 2 It is a beam-winning structure. The wooden structure material includes not only solid materials but also materials manufactured from wood, for example, laminated wood and plywood.

  A first metal fitting 5A is fixed to the upper surface of the beam 1, and a second metal fitting 5B is fixed to the lower surface of the beam 1. Note that the first metal fitting 5A and the second metal fitting 5B are referred to as the first and second metal fittings 5 when they are not particularly distinguished. The first and second metal fittings 5 have a substantially T-shaped cross section including a contact portion 51 that contacts the surface of the beam 1 and an upright portion 52 that rises from a substantially central position of the contact portion 51. . Further, screw insertion holes 51a are formed in the vertical direction in diagonal positions on each side of the contact portion 51 with the upright portion 52 as a boundary. In the upright portion 52, four insertion holes 52a are formed in the horizontal direction. The surface of the upright portion 52 where the insertion hole 52 a is formed is parallel to the side surface of the beam 1.

  A slit 2 a into which the upright portion 52 is inserted is formed at a substantially central side of the lower end surface of the upper column 2. Further, four pin insertion holes 2b corresponding to the insertion holes 52a are formed on the side surface (the side surface parallel to the slit 2a) on the lower end side of the upper column 2 in a direction intersecting the slit 2a. Yes. In a state where the upright portion 52 is inserted into the slit 2a, a pin (not shown) is press-fitted into the pin insertion hole 2b.

  Similarly, a slit 3 a into which the upright portion 52 is inserted is formed on the substantially central side of the upper end surface of the lower column 3. Further, four pin insertion holes 3b corresponding to the insertion holes 52a are formed in the side surface (the side surface parallel to the slit 2a) on the upper end side of the lower column 3 in a direction intersecting with the slit 2a. ing. In a state where the upright portion 52 is inserted into the slit 3a, a pin (not shown) is press-fitted into the pin insertion hole 3b.

  The first metal fitting 5A is fixed to the beam 1 by a first long screw 6A screwed through the screw insertion hole 51a. Similarly, the second metal fitting 5B is also fixed to the beam 1 by a second long screw 6B screwed through the screw insertion hole 51a. Here, the long screw is assumed to have a length of 10 cm or more. In screwing the first and second long screws 6A and 6B, a pilot hole 1a may be formed in the beam 1, or the first and second long screws 6A and 6B may be directly connected without a pilot hole. It may be screwed. When there is no pilot hole, the work time can be reduced accordingly.

  Further, the first long screw 6A and the second long screw 6B have the same length (for example, a length of 20 cm), and this length is the beam formation of the beam 1 (of the first wooden structure material). The width is longer than half of h. The thickness (nominal diameter) of the first long screw 6A and the second long screw 6B is, for example, about M10 to M16. Further, the first long screw 6A and the second long screw 6B are so-called all screw screws, but a non-screw portion may be present on the lower part of the head or a part of the screw tip side. The first long screw 6A and the second long screw 6B both have the washer portion 6a integrally at the lower end of the head, but the washer portion 6a may be separately provided. Further, a countersink portion into which the head portion enters may be formed at a portion of the end surface of the pillars 2 and 3 where the head portions of the first and second long screws 6A and 6B are located.

  As shown in FIG. 2, the first conical region 7A is formed by a virtual line rotated at an angle of 45 degrees with respect to the axis of the first long screw 6A at the tip of the first long screw 6A, and the second long screw 6A. At the tip of the screw 6B, the second conical region 7B is overlapped by an imaginary line rotated at an angle of 45 degrees with respect to the axis of the second long screw 6B.

  The length of the overlap in the direction from the one surface to the opposite surface with respect to the beam formation (the width of the first wooden structure material) h of the beam 1 in the direction from the one surface to the opposite surface. Is set to h / 3.

  With the above configuration, the first metal fitting 5A is fixed to the beam 1 by the first long screw 6A, and the second metal fitting 5B is fixed to the beam 1 by the second long screw 6B. Since the first conical region 7A and the second conical region 7B by the second long screw 6B overlap as described above, the beam 1 has received a load that is pulled in the direction of the one surface and the opposite surface. However, since this load is received by the first and second long screws 6A and 6B and transmitted in the wood portion between the first and second long screws 6A and 6B, the wood portion due to the pulling force. Cracks are less likely to occur. Further, when a load for compressing the beam 1 from the direction of the one surface and the opposite surface is received, the load is also received by the first and second long screws 6A and 6B and the first and second lengths. Since it is transmitted in the wood part between the screws 6A and 6B, it is easy to model the structure analysis, and it is possible to suppress the difference between the result obtained by the analysis model and the actual structure.

  In addition, such a structure can increase the contact area with the wood portion by the screw portions of the first and second long screws 6A and 6B, so that the rigidity is higher than that of a conventional bolt type or hozo pipe connection structure. Is obtained. Moreover, such a structure can be suitably used also in the case where a column is newly incorporated at a location where there is no column in the reform.

  When the angle forming the first and second conical regions 7A and 7B is about 45 degrees with respect to the axes of the first and second long screws 6A and 6B, the distance between the first and second long screws 6A and 6B is as follows. The load transmission in the wood part of can be performed accurately. The angle is not limited to 45 degrees and may be 40 degrees or more and 50 degrees or less.

  Further, with respect to the width h of the first wooden structure material in the direction from the one surface to the opposite surface, the length of the overlap in the direction from the one surface to the opposite surface is about h / 3. Then, load transmission at the wood portion between the first and second long screws 6A and 6B can be accurately performed. The length of the overlap is not limited to h / 3, and may be h / 4 or more and h / 2 or less.

  Further, when the lengths of the first long screw 6A and the second long screw 6B are the same, the overlap can be generated on the center side of the width of the beam 1. Of course, the first long screw 6A and the second long screw 6B are not limited to the same length.

  In the above example, the first wooden structural material is the beam 1 and the second wooden structural material and the third wooden structural material are the pillars 2 and 3, but the present invention is not limited thereto. The first wood structure material may be a pillar, and the second wood structure material and the third wood structure material may be a pillar-winning structure.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

1: Beam 1a: Pilot hole 2: Upper pillar 2a: Slit 2b: Pin insertion hole 3: Lower pillar 3a: Slit 3b: Pin insertion hole 5: Metal fitting 5A: First metal fitting 5B: Second metal fitting 6A: First length Screw 6B: Second long screw 6a: Washer portion 7A: First conical region 7B: Second conical region 51: Abutting portion 51a: Screw insertion hole 52: Upright portion 52a: Insertion hole

Claims (6)

The second wood structure material is connected to the first metal fitting fixed to one surface of the first wood structure material at the end surface side thereof, and is fixed to the opposite surface located on the opposite side to the one surface. It is a fixed connection structure in which the third wood structure material is connected to the metal fitting at the end face side,
The first metal fitting arranged on the one surface is fixed by one or a plurality of first long screws screwed from the one surface,
The second metal fitting arranged on the opposite surface is fixed by one or a plurality of second long screws screwed from the opposite surface,
A first conical region formed by an imaginary line rotated at a predetermined angle with respect to the axis of the first long screw at the tip of the first long screw, and the axis of the second long screw at the tip of the second long screw A connecting structure for a wooden structure material, characterized in that the second conical region is overlapped by a virtual line rotated at a predetermined angle with respect to a reference.   2. The connection structure of wood structure materials according to claim 1, wherein the predetermined angle is not less than 40 degrees and not more than 50 degrees.   The connection structure of the wooden structure materials according to claim 2, wherein the width h of the first wooden structure material in the direction from the one surface to the opposite surface is from the one surface to the opposite surface direction. A connecting structure for a wood structure material, wherein the overlap length is h / 4 or more and h / 2 or less.   In the connection structure of the wooden structure material of any one of Claims 1-3, the length of the said 1st long screw and the said 2nd long screw is the same, The length of the wooden structure material characterized by the above-mentioned Connected structure.   5. The connection structure of the wood structure materials according to claim 1, wherein the first wood structure material is a beam, and the second wood structure material and the third wood structure material are columns. A connecting structure of wood structure materials characterized by being.   The connection structure of the wooden structure materials according to any one of claims 1 to 4, wherein the first wooden structure material is a pillar, and the second wooden structure material and the third wooden structure material are beams. A connecting structure of wood structure materials characterized by being.

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