JP6792338B2 - Wood structural material reinforcement structure - Google Patents

Description

The present invention relates to a wood structural material reinforcing structure that reinforces the periphery of an opening formed in the wood structural material.

As shown in FIG. 7, when a load in the vertical direction is applied to the wood beam 100, split 102 may occur in the beam longitudinal direction on both lateral sides of the opening 101 penetrating the wood beam 100 in the horizontal direction. Conventionally, the periphery of the opening 101 has been reinforced.

In Patent Document 1, for the purpose of preventing a decrease in the mechanical strength of the opening of the beam member due to the large laminated wood, a steel pipe is fitted and bonded to the opening that penetrates the laminated wood structural material in the horizontal direction, and the opening is formed. A reinforcing structure is disclosed in which a plurality of bolt holes penetrating in the vertical direction are perforated in the periphery, and the laminated wood structural material is tightened in the vertical direction by the bolts inserted through the bolt holes.

Further, Patent Document 2 discloses a method of arranging a reinforcing plate on the side surface of the beam on the peripheral side of the opening formed in the wooden beam to reinforce the beam.

Japanese Unexamined Patent Publication No. 08-209856 Patent No. 5239199

However, in the reinforcing structure of Patent Document 1, since a bolt hole penetrating in the vertical direction is formed around the opening, a cross-sectional defect may occur in the beam member due to the bolt hole, and the periphery of the opening may not be sufficiently reinforced. is there. Further, since the bolt has a structure in which an adhesive is injected, there is a drawback that the component cost becomes high and the building price rises.

Further, the reinforcing structure of Patent Document 2 has a drawback that it is difficult to use as a beam on the outer periphery of a building because a reinforcing plate is projected from the side surface of the beam.

In view of the above circumstances, it is an object of the present invention to provide a wood structural material reinforcing structure capable of easily reinforcing the periphery of the opening of a wooden structural material having an opening formed in the horizontal direction at low cost. ..

The wood structural material reinforcing structure of the present invention is a wood structural material reinforcing structure that reinforces the periphery of the opening of the wood structural material having an opening formed in the horizontal direction in order to solve the above problems, and has no leading hole. The rod-shaped fixing member with a screw portion that can be attached in is screwed in from the surface forming the long side of the wood structural material, and exceeds each split assumed area that is assumed to occur in the long side direction of the wood structural material from the opening. It is characterized by being intruded.

With the above configuration, the rod-shaped fixing member has entered beyond the assumed splitting area, and the screw portion resists slipping of the rod-shaped fixing member when splitting actually occurs in the assumed splitting area. Therefore, the occurrence of the split is suppressed. Further, since the rod-shaped fixing member can be attached to the wood structural material without a preceding hole, it is possible to eliminate a cross-sectional defect when forming a hole for inserting a bolt in the wood structural material, and the strength of the wood structural material can be eliminated. The decrease can be avoided. Further, since it is not necessary to provide a reinforcing plate on the side surface of the wooden structural material, the wooden structural material can be used on the outer peripheral side of the building without any problem.

The rod-shaped fixing member may be screwed in from a surface forming a long side of the wood structural material in which the opening is not formed. Rather than screwing the rod-shaped fixing member from the long side surface of the wood structural material in which the opening is formed, it is better to screw in from the long side surface of the wood structural material in which the opening is not formed. Screwing can be done easily and accurately.

A plurality of the rod-shaped fixing members may be provided on the side of each split assumption region. According to this, both sides of the opening can be reinforced with higher strength by the plurality of rod-shaped fixing members.

The plurality of rod-shaped fixing members on the side of each split assumption region may enter in opposite directions from the two or more surfaces forming the long side. According to this, stronger reinforcement can be performed as compared with the case where the rod-shaped fixing member is provided only from one of the two or more surfaces forming the long side.

The distance between the plurality of rod-shaped fixing members next to each other may be 2.5 dr or more, where the nominal diameter of the rod-shaped fixing members is dr. According to this, it is possible to secure the thickness of the portion between the adjacent rod-shaped fixing members and suppress the occurrence of cracks or the like at the portion.

Assuming that the diameter of the opening is R and the nominal diameter of the rod-shaped fixing member is dr, the rod-shaped fixing member has a range of 2.5 dr + R / 2 or more and R or less in the long side direction of the wood structural material from the center of the opening. It may be mounted inside. According to this, the thickness of the portion of the wood structural material from the peripheral surface side of the opening to the rod-shaped fixing member can be secured, cracks and the like can be suppressed in the portion, and the rod-shaped fixing member can be formed. Reinforcement around the opening can be appropriately performed so as not to be too far from the opening.

Assuming that the nominal diameter of the rod-shaped fixing member is dr, the rod-shaped fixing member may be mounted by forming an edge of 3 dr or more from the edge of the wood structural material. According to this, it is possible to secure the thickness of the portion between the rod-shaped fixing member and the edge of the wooden structural material, and to suppress the occurrence of cracks or the like at the portion.

According to the present invention, it is possible to easily reinforce the periphery of the opening of the wooden structural material having the opening formed in the horizontal direction at low cost.

It is explanatory drawing which showed the wood structural material reinforcement structure which concerns on embodiment of this invention. It is a side view which illustrates the screw used in the wood structural material reinforcement structure of FIG. It is explanatory drawing which showed the arrangement example of the screw of the wood structural material reinforcement structure of FIG. It is explanatory drawing which showed the arrangement example of the screw of the wood structural material reinforcement structure which concerns on other embodiment of this invention. It is explanatory drawing which showed the arrangement example of the screw of the wood structural material reinforcement structure which concerns on other embodiment of this invention. It is explanatory drawing which showed the arrangement example of the screw of the wood structural material reinforcement structure which concerns on other embodiment of this invention. It is explanatory drawing which showed that the opening formed in the timber beam is cracked by a vertical load.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, in the wood structural material reinforcing structure of this embodiment, a circular opening 1a penetrating in the horizontal direction is formed in the wood beam 1 which is a wood structural material in order to pass a pipe or the like. The structure is such that the periphery of the opening 1a is reinforced. The height (beam radius) H of the wood beam 1 is, for example, 180 mm or more, and the diameter R of the opening 1a is, for example, about 1/3 H to 1 / 2H. Of course, it is not limited to such dimensions. Further, the wood beam 1 may be a laminated wood or a solid wood.

In this wood structural material reinforcing structure, both lateral sides of the opening 1a are reinforced by long screws 2 which are rod-shaped fixing members. The long screw 2 has, for example, the full screw structure shown in FIG. 2, and can be screwed into the wood beam 1 without a leading hole. For example, a star-shaped recess for inserting a socket is formed on the head of the long screw 2.

The long screw 2 is screwed in from the upper surface and the lower surface, which are the surfaces forming the long sides of the wood beam 1 in which the opening 1a is not formed, respectively, in the wood beam 1 in the direction of the long side of the wood beam 1. It has entered beyond the assumed splitting area C, which is expected to occur.

As shown in FIG. 3, the split assumed region C is the end of the position where the diameter line of the opening 1a in the short side direction (height direction) of the wood beam 1 is rotated within a range of, for example, 45 degrees ± 5 degrees. It is said that the starting point is generated in the long side direction of the wood beam 1. In this embodiment, it is assumed that it occurs in the long side direction of the wood beam 1 starting from the end of the diameter line at the position rotated by 45 degrees. In this case, the split assumption area C is the upper end or the lower end of the opening 1a. It is set at the location of (2-√2) R / 4. In FIG. 3, the split assumption region C is shown on the upper right side of the opening 1a and the lower left side of the opening 1a, but can also be assumed on the lower right side and the upper left side of the opening 1a.

The long screw 2 has a length such that at least the tip thereof exceeds the (2-√2) R / 4 portion from the upper end or the lower end of the opening 1a, but is about 50 of the height H of the wood beam 1. It may have a length of% or more, more preferably 70% or more. Further, in the long screw 2, the length of the portion exceeding the split assumption region C and the length of the portion on the front side thereof may be substantially the same. Of course, the length screw 2 may have a length longer than the short side direction (height direction) of the wood beam 1.

Further, a plurality (for example, four) of the long screws 2 are provided on each lateral side (the side of each split assumption area C) of the opening 1a in the long side direction of the wood beam 1. Then, in the plurality of long screws 2 on each of the lateral sides, for example, adjacent long screws 2 are screwed in opposite directions from the upper and lower surfaces forming the long sides of the wood beam 1. In FIG. 3, the long screw 2 screwed from the upper surface forming the long side of the wood beam 1 is represented by a circle, and the long screw 2 screwed from the lower surface is indicated by a cross in the circle. Further, the distance between the adjacent long screws 2 existing on each of the lateral sides is 2.5 dr or more with respect to the center of the screws, where the nominal diameter of the long screws 2 is dr.

Further, the long screw 2 is mounted at a distance of 3 dr or more from the edge of the wood beam 1 with respect to the center of the screw. Further, the long screw 2 is provided within a range of 2.5 dr + R / 2 or more and R or less in the long side direction of the wood beam 1 from the center of the opening 1a with reference to the center of the screw. In this embodiment, in the four long screws 2 on each lateral side of the opening 1a, the two long screws 2 on the center side are farther from the center of the opening 1a than the two long screws 2 on the veranda. By shifting to, the distance between adjacent long screws 2 can be made longer.

With the above configuration, the long screw 2 has entered beyond the assumed split area C, and the screw portion thereof is subject to slippage of the long screw 2 when splitting actually occurs in the assumed split area C. Since it becomes a resistance, the occurrence of the split is suppressed. Further, since the long screw 2 can be attached to the wood beam 1 without a leading hole, it is possible to eliminate a cross-sectional defect when forming a hole for inserting a bolt in the wood beam 1, and the strength of the wood beam 1 can be eliminated. The decrease can be avoided. Further, since it is not necessary to provide a reinforcing plate on the side surface of the wood beam 1, the wood beam 1 can be used on the outer peripheral side of the building without any problem.

When a plurality of the long screws 2 are provided on each lateral side of the opening 1a (the side of each split assumption area C), both sides of the opening 1a can be reinforced with higher strength.

When the plurality of long screws 2 on each lateral side of the opening 1a (the side of each split assumption area C) enter in opposite directions from the two long side surfaces on which the opening 1a is not formed. As compared with the case where the long screw 2 is provided only from one side forming the long side, stronger reinforcement can be performed. Further, splitting can be prevented regardless of which side of the two long sides forming the long side receives the load. In particular, as described above, when the long screw 2 has a length of, for example, about 70% or more of the height H of the wood beam 1, the tip sides of the long screws 2 screwed from opposite sides of each other are over. Since it wraps, the reinforcing force can be further improved.

When the distance between the adjacent long screws 2 existing on each lateral side of the opening 1a is 2.5 dr or more, the thickness of the portion between the adjacent long screws 2 is secured, and the thickness of the portion is secured at the portion. It is possible to suppress the occurrence of cracks and the like.

When the long screw 2 is mounted within a range of 2.5 dr + R / 2 or more and R or less in the long side direction of the wood beam 1 from the center of the opening 1a, the peripheral surface side of the opening 1a of the wood beam 1 The thickness of the portion from to the long screw 2 to the long screw 2 can be secured, cracks and the like can be suppressed in the portion, and the long screw 2 is not too far from the opening 1a to reinforce the circumference of the opening. Can be done properly.

When the long screw 2 is attached by forming an edge of 3 dr or more from the edge of the wood beam 1, the thickness of the portion between the long screw 2 and the edge of the wood beam 1 is secured. It is possible to suppress the occurrence of cracks and the like at the site.

In the above embodiment, the above-mentioned wood beam 1 has been illustrated, but the wood structural material is not limited to this, and the wood pillar is also included. In this wood pillar, both sides of the opening 1a in the long side direction (longitudinal direction) are the upper and lower sides of the opening 1a, and the two sides forming the long side where the opening 1a is not formed are the two sides of the wood pillar. It becomes the side.

Further, the direction in which the long screw 2 enters is not limited to the direction parallel to the short side direction of the wood structural material (vertical direction in the wood beam 1), but as shown in FIG. 4, in the longitudinal direction of the wood structural material. It may be tilted slightly. In this case, at the place where the long screw 2 that has entered diagonally is closest to the opening 1a, the long screw 2 is 2.5dr + R / 2 or more R from the center of the opening 1a in the long side direction of the wooden structural material. It may be mounted within the following range. Further, even in such an oblique mounting structure, a plurality of the long screws 2 can be provided on both sides of the opening 1a in the long side direction of the wooden structural material, as in the non-oblique mounting structure shown in FIG. In addition, the distance between these long screws 2 can be set, and they can be mounted in opposite directions.

Further, the long screw 2 is not limited to being screwed from the surface (upper surface and lower surface in the wooden beam 1) forming the long side of the wooden structural material in which the opening 1a is not formed, and is not limited to that shown in FIG. As shown, it may be screwed diagonally from the surface forming the long side of the wood structural material in which the opening 1a is formed (the vertical surface in the wood beam 1). In order to facilitate screwing of the long screw 2, a shallow diagonal hole may be formed on the surface forming the long side of the wooden structural material in which the opening 1a is formed.

However, rather than screwing the long screw 2 from the surface forming the long side of the wood structural material in which the opening 1a is formed, screwing in from the surface forming the long side of the wood structural material in which the opening 1a is not formed. This can be done more easily and accurately. The surfaces forming the long sides of the wooden structural material in which the opening 1a is not formed are not limited to two surfaces (upper surface and lower surface in the wooden beam 1), and as shown in FIG. 6, the wooden structural material is formed. If the cross section is octagonal, there are 6 faces. The long screw 2 may be screwed in using all six surfaces.

Further, the full screw type was used as the long screw 2, but the present invention is not limited to this. For example, a partially screw type screw in which a screw portion is formed only on the side exceeding the split expected region C can be used. In this case, it is desirable to provide a washer between the head of the screw and the wooden structural material. Where there is no screw part of the screw, slippage is likely to occur and it does not resist the occurrence of splitting. However, if the washer is provided, the screw head is suppressed from entering the wooden structural material and the necessary resistance is required. Can be caused.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to those of the illustrated embodiments. It is possible to make various modifications and modifications to the illustrated embodiment within the same range as the present invention or within the same range.

1: Wood beam (wooden structural material)
1a: Aperture 2: Long screw (rod-shaped fixing member)
C: Expected split area

Claims (5)

A rod-shaped fixing member with a screw portion, which is a wooden structural material reinforcing structure for reinforcing the circumference of the wooden structural material having an opening formed in the horizontal direction and can be mounted without a leading hole, is a long side of the wooden structural material. It is screwed in from the surface forming the above, and enters beyond the expected split area on one side and the other side, which is expected to occur in the long side direction of the wood structural material across the opening, and the rod-shaped fixing member is on one side and the other. There are multiple pieces on each side ,
The plurality of rod-shaped fixing members on one side enter in opposite directions from the two or more surfaces forming the long side, and enter beyond the expected splitting area on the side closer to each rod-shaped fixing member.
The plurality of rod-shaped fixing members on the other side enter in opposite directions from the two or more surfaces forming the long side, and enter beyond the expected splitting area on the side close to each rod-shaped fixing member. Wood structural material reinforcement structure. In the wood structural material reinforcing structure according to claim 1, the rod-shaped fixing member is screwed from a surface forming a long side of the wood structural material in which the opening is not formed. Construction. In the wood structural material reinforcing structure according to claim 1 or 2, the distance between the plurality of rod-shaped fixing members on one side that are placed in opposite directions to each other, and the plurality of rod-shaped fixings on the other side. A wooden structural material reinforced structure characterized in that the distance between adjacent members placed in opposite directions is 2.5 dr or more, where the nominal diameter of the rod-shaped fixing member is dr. In the wood structural material reinforcing structure according to any one of claims 1 to 3 , if the diameter of the opening is R and the nominal diameter of the rod-shaped fixing member is dr, the rod-shaped fixing member has the opening. A wooden structural material reinforced structure characterized in that it is mounted within a range of 2.5 dr + R / 2 or more and R or less in the long side direction of the wooden structural material from the center of the above. In the wood structural material reinforcing structure according to any one of claims 1 to 4 , assuming that the nominal diameter of the rod-shaped fixing member is dr, the rod-shaped fixing member is 3 dr or more from the edge of the wood structural material. A wooden structural material reinforced structure characterized in that it is mounted with a margin formed.

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