JP2022120525A - Reinforcement structure of wooden building - Google Patents

Abstract

To provide a reinforcement structure of a wooden building to reinforce a junction of the wooden building capable of enhancing earthquake resistance or workability.SOLUTION: A reinforcement structure of a wooden building has a plurality of anchor bolts 10 inserted into a concrete foundation 2 or a wooden material of the wooden building and fixed by an adhesive agent and a reinforcement board 20 coupled to the plurality of anchor bolts 10 at a plurality of positions. The reinforcement board has a vertical part, a horizontal part and an inclined part, and a cavity is formed between the vertical part, the horizontal part and the inclined part. A seal member is arranged between the reinforcement board and the wooden building, and a hole to release the adhesive agent 11 is formed at a position corresponding to an outer peripheral surface of the anchor bolt of the seal member.SELECTED DRAWING: Figure 2

Description

The present invention relates to a reinforcing structure for wooden buildings. In particular, it relates to a reinforcing structure for improving the seismic strength of a building constructed by a wooden frame construction method.

When a strong load is applied to a wooden building due to an earthquake or the like, an accident occurs in which the wooden building is damaged or collapses. In areas severely damaged by the 2016 Kumamoto earthquake, many wooden buildings collapsed, even if they conformed to the new 1981 earthquake resistance standards. In collapsed buildings, there were many cases in which joints such as pillars, girders, beams, foundations, and foundations were separated or destroyed. In order to improve earthquake resistance, a reinforcing structure is required to firmly fix the joints.

The inventor of the present application has developed a reinforcing structure for a wooden building disclosed in Patent Literature 1 in view of the circumstances as described above. In the reinforcing structure, a plurality of anchor bolts are fixed to the wooden building using an adhesive, and a reinforcing plate is connected to the plurality of anchor bolts, thereby strongly reinforcing the joints of the wooden building. .

JP 2019-20873 A

Although Patent Document 1 discloses the basic idea of reinforcing joints of a wooden building by connecting a plurality of anchor bolts to a reinforcing plate, the shape of the reinforcing plate, the connection structure of the anchor bolts and the reinforcing plate, etc. are disclosed. There was still room for further improvement.

The present invention provides a reinforcing structure for a wooden building that reinforces the joints of the wooden building by connecting a plurality of anchor bolts to a reinforcing plate, and is capable of improving earthquake resistance and workability. offer.

The present invention relates to a reinforcing structure for a wooden building, comprising: a plurality of anchor bolts inserted into a concrete foundation or wood of the wooden building and fixed with an adhesive; a connecting reinforcing plate, wherein the reinforcing plate has a shape having at least a vertical portion arranged in a vertical direction and a horizontal portion arranged in a horizontal direction; is connected to the anchor bolts fixed to the timber and to the anchor bolts fixed to the concrete foundation in at least two locations on the vertical portion, and the reinforcing plate is connected to the anchor bolt in at least one location on the horizontal portion. The reinforcing plate is connected to the anchor bolt fixed to the timber, and the reinforcing plate has an inclined portion connecting a position where the anchor bolt is connected on the vertical portion and a position where the anchor bolt is connected on the horizontal portion. Further, a cavity is formed between the vertical portion, the horizontal portion and the inclined portion.
In the reinforcement structure constructed as described above, the joints between the foundation of the wooden building and the timber are strongly fixed by the anchor bolts and reinforcing plates fixed with adhesive, thereby improving the earthquake resistance of the wooden building. It can be greatly improved. Further, by configuring the reinforcing plate with a vertical portion, a horizontal portion, and an inclined portion and forming a cavity therebetween, it is possible to suppress deformation of the reinforcing plate due to the load.

In the above configuration, a seal member is arranged between the reinforcing plate and the wooden building, and the seal member is formed with a notch for inserting the anchor bolt. It is preferable that a hole for releasing the adhesive is formed at a position corresponding to the outer peripheral surface.
In the reinforcing structure configured as described above, the sealing member can improve the adhesion between the reinforcing plate and the wooden building, so that the joint can be fixed more firmly. In addition, when the anchor bolt is inserted into the notch of the sealing member and inserted into the bolt hole formed in the wooden structure, the adhesive overflows from the bolt hole, which corresponds to the outer peripheral surface of the anchor bolt in the sealing member. A hole is formed in advance at the position, so that the overflowing adhesive can escape to the outside of the sealing member through the hole.

In the above configuration, the vertical portion, the horizontal portion, and the inclined portion may be formed from a single plate.
In the reinforcing structure configured as described above, since the reinforcing plate is formed from a single plate, the manufacturing cost of the reinforcing plate can be kept low and the strength of the reinforcing plate can be easily ensured.

In the above configuration, the cavity may be triangular.
In the reinforcing structure configured as described above, since the entire reinforcing plate forms a shape like a truss structure, the strength of the reinforcing plate can be efficiently ensured.

In the above configuration, the inclined portion formed from the position where the anchor bolt fixed to the wood of the vertical portion is connected, and the anchor bolt fixed to the concrete foundation of the vertical portion are connected. The inclined portion formed from the position may be orthogonal to each other.
In the reinforcing structure configured as described above, the two inclined portions are orthogonal to each other, so that the strength of the reinforcing plate can be improved.

In the arrangement, the horizontal portion is connected to the anchor bolts fixed to the timber in at least two places, and the slope formed from the position where the anchor bolts fixed to the timber of the vertical portion are connected. A square may be formed by connecting the portion and the inclined portion formed from the position where the anchor bolt fixed to the concrete foundation of the vertical portion is connected.
In the reinforcing structure configured as described above, since the shape of the connecting inclined portions is a square, the strength of the reinforcing plate can be improved.

In the above configuration, the reinforcing plate may be connected to the anchor bolt at the intersection of the vertical portion and the horizontal portion.
In the reinforcing structure configured as described above, the anchor bolt and the reinforcing plate are connected even at the intersection of the vertical portion and the horizontal portion, so that the connection between the foundation and the timber can be performed more firmly.

In the above configuration, the anchor bolt is partially inserted into a fixing hole provided in the reinforcing plate, and the remaining portion of the fixing hole is closed by welding, thereby connecting the reinforcing plate and the anchor bolt. It may be configured to be
In the reinforcing structure configured as described above, the anchor bolts and the reinforcing plate can be connected without using nuts, so it is difficult to impair the workability of wall materials and exterior materials, and the design of wooden buildings is enhanced. Hard to damage.

In the above configuration, the cut formed in the seal member may have a radial shape, and the hole may be formed on the cut.
In the reinforcing structure constructed as described above, the same sealing member can be used for anchor bolts of various diameters.

According to the present invention, there is provided a reinforcing structure for a wooden building that reinforces joints of a wooden building by connecting a plurality of anchor bolts to a reinforcing plate, and the reinforcing structure can further improve earthquake resistance and workability. can be provided.

It is a figure which shows the example of the mounting position of a reinforcement structure. FIG. 4 is a cross-sectional view showing an example in which a reinforcing structure is installed between the foundation and lower pillars of a wooden building; It is sectional drawing which shows the example which mounted|wore the reinforcement structure between the lower pillar and the upper pillar of a wooden building. It is a top view which shows an example of a reinforcing plate. FIG. 4 is a plan view showing another example of a reinforcing plate; It is a top view which shows an example of a sealing member. FIG. 4 is a cross-sectional view showing a state in which the reinforcing plate is fixed to the anchor bolt by welding; FIG. 4 is a cross-sectional view showing a state in which the reinforcing plate is fixed to the anchor bolt with nuts;

Embodiments of the invention will now be described with reference to the drawings, given by way of example.
FIG. 1 is a diagram showing an example of a mounting position when a reinforcing structure of the present invention is mounted on a wooden building 1. As shown in FIG. At the positions shown in FIGS. 1A and 1B, the reinforcing structure of the present invention is installed between the foundation 2 and the lower pillars (first story pillars) 3 of the wooden building 1. As shown in FIG. At this time, the base 5 and braces 6 arranged between or near the base 2 and the lower pillar 3 can also be attached at the same time. 1, the reinforcing structure of the present invention is mounted between the lower pillar 3 and the upper pillar (second floor pillar) 4 of the wooden building 1. As shown in FIG. At this time, the girders (or beams) 7 and braces 6 placed between or in the vicinity of the lower pillar 3 and the upper pillar 4 can also be attached at the same time. It should be noted that the mounting positions described above are merely examples, and the reinforcing structure of the present invention can be mounted at any location where two or more members are connected in a wooden building, particularly where three or more members are connected. It is effective when attached to a place where the Here, the foundation 2 is made of concrete, and the lower pillar 3, upper pillar 4, base 5, brace 6, and girder 7 are made of wood.

FIG. 2 is a sectional view showing an example in which a reinforcing structure is installed between the foundation 2 and the lower pillar 3 of the wooden building 1. As shown in FIG. In other words, this is an example in which a reinforcing structure is installed at the position of A or B in FIG. Bolt holes for inserting anchor bolts 10 are provided at a plurality of positions of the base 2, the lower pillar 3, and the base 5. Details of the positions where the bolt holes are formed will be described later. In this embodiment, the anchor bolt 10 has a diameter of 16-20 mm and a total length of 80-200 mm. Anchor bolts 10 are horizontally inserted into the bolt holes and arranged perpendicular to the wall surface of the wooden building 1 . An adhesive 11 is injected between the anchor bolt 10 and the bolt hole, and the anchor bolt 10 is firmly fixed to the foundation 2, the lower pillar 3, and the base 5 by the adhesive 11. - 特許庁HIT-RE500V3 manufactured by Hilti Corporation, which is an epoxy resin mortar, is used for the adhesive 11 . An anchor bolt 10 having one end fixed to the foundation 2, the lower pillar 3, and the foundation 5 is connected to the reinforcing plate 20 or the reinforcing plate 30 at the other end. The reinforcing plate 20 (30) is connected to a plurality of anchor bolts 10 at a plurality of positions. A method of connecting the anchor bolt 10 and the reinforcing plate 20 (30) will be described later.

FIG. 3 is a sectional view showing an example in which a reinforcing structure is installed between the lower pillar 3 and the upper pillar 4 of the wooden building 1. As shown in FIG. That is, this is an example in which a reinforcing structure is installed at the position of C or D in FIG. Bolt holes for inserting anchor bolts 10 are provided at a plurality of positions of the lower pillar 3, upper pillar 4, and girder 7. As shown in FIG. Anchor bolts 10 are horizontally inserted into the bolt holes and arranged perpendicular to the wall surface of the wooden building 1 . An adhesive 11 is injected between the anchor bolt 10 and the bolt hole, and the anchor bolt 10 is firmly fixed to the lower pillar 3, the upper pillar 4, and the girder 7 by the adhesive 11. - 特許庁An anchor bolt 10 fixed at one end to the lower pillar 3, upper pillar 4, and girder 7 is connected to a reinforcing plate 20 or a reinforcing plate 30 at the other end.

FIG. 4 is a plan view showing a reinforcing plate 20 as an example of the reinforcing plate. The reinforcing plate 20 is used at the position A or C in FIG. 1, that is, the position that is not the end portion in the lateral direction (the position where there are bases and girders on both left and right sides). The reinforcing plate 20 is a single steel plate (a single plate) having a predetermined thickness (9 mm in this embodiment). The reinforcing plate 20 has a vertical portion 21 arranged in the vertical direction, a horizontal portion 22 arranged in the horizontal direction, and an inclined portion 23 connecting the end of the vertical portion 21 and the end of the horizontal portion 22 . is doing. The vertical portion 21, the horizontal portion 22, and the inclined portion 23 are each formed in a linear shape having a predetermined width (70 mm in this embodiment), and the vertical portion 21 and the horizontal portion 22 are perpendicular to each other at the center. The reinforcing plate 20 as a whole has a substantially square outer shape in which four inclined portions 23 connect four ends of a vertical portion 21 and a horizontal portion 22 . As shown in FIG. 4, the corners of the square are slightly cut off in a straight line shape, and strictly speaking, the shape is an octagon. Between the vertical portion 21, the horizontal portion 22, and the inclined portion 23, four triangular (isosceles right triangle) cavities 24 are formed through the reinforcing plate 20 in the thickness direction.

A fixing hole 21A penetrating through the reinforcing plate 20 in the thickness direction is provided near the lower end of the vertical portion 21 . A fixing hole 21B penetrating through the reinforcing plate 20 in the thickness direction is provided near the upper end of the vertical portion 21 . Fixing holes 22A and 22B penetrating through the reinforcing plate 20 in the thickness direction are provided near the left and right ends of the horizontal portion 22 . A fixing hole 22</b>C is provided near the center of the horizontal portion 22 so as to pass through the reinforcing plate 20 in the thickness direction. It can also be said that the fixing hole 22C is formed at the portion where the vertical portion 21 and the horizontal portion 22 intersect. The vertical portion 21 has three through holes 21A, 22C, and 21B formed in a straight line in the vertical direction, and the horizontal portion 22 has three through holes 22A, 22C, and 22B formed in a straight line in the horizontal direction. You can also say The inclined portion 23 has positions (through holes 21A, 21B) where the anchor bolts 10 are connected on the vertical portion 21 and positions (through holes 22A, 22B) where the anchor bolts 10 are connected on the horizontal portion 22. tied. In this embodiment, the inclined portion 23 is inclined at 45° with respect to the vertical portion 21 and the horizontal portion 22 . As a result, the inclined portion 23 formed from the position of the through hole 21A and the inclined portion 23 formed from the position of the through hole 21B are orthogonal to each other. Furthermore, the shape connecting the two inclined portions 23 formed from the position of the through hole 21A and the two inclined portions 23 formed from the position of the through hole 21B is a square. Although it is possible to omit the fixing hole 23C, the fixing strength can be improved by providing the fixing hole 23C. The distance between the through-holes in the vertical direction (distance between the through-holes 21A and 22C, the distance between the through-holes 22C and 21B) and the distance between the through-holes in the horizontal direction (the distance between the through-holes 22A and 22C, The distances between the through holes 22C and the through holes 22B) are all the same, and are set to 187.5 mm in this embodiment. Although this distance can be changed, it is preferably 180 mm or more.

A case where the reinforcing plate 20 is fixed at the position A in FIG. 1 will be described below. In this case, the anchor bolt 10 fixed to the foundation 2 is inserted and connected to the fixing hole 21A. Further, the anchor bolt 10 fixed to the lower pillar 3 is inserted and connected to the fixing hole 21B. Anchor bolts 10 fixed to the base 4 are inserted and connected to the fixing holes 22A, 22B, and 22C. That is, the position of the through hole 21A is the position where the anchor bolt 10 fixed to the foundation 2 of the vertical portion 21 is connected, and the position of the through hole 21B is the anchor bolt 10 fixed to the lower pillar 3 of the vertical portion 21. is the position where is connected. As described above, the reinforcing plate 20 includes the anchor bolts 10 fixed to the lower pillar 3 (wood) and the anchor bolts fixed to the foundation 2 (concrete) at at least two locations (through holes 21A and 21B) of the vertical portion 21. 10, and are connected to anchor bolts 10 fixed to the base 5 (wood) at at least two locations (through holes 22A and 22B) of the horizontal portion 22. As shown in FIG.

The case where the reinforcing plate 20 is fixed at the position C in FIG. 1 will be described below. In this case, the anchor bolt 10 fixed to the lower pillar 3 is inserted and connected to the fixing hole 21A. Further, the anchor bolt 10 fixed to the upper pillar 4 is inserted and connected to the fixing hole 21B. Anchor bolts 10 fixed to the girder 7 are inserted and connected to the fixing holes 22A, 22B, and 22C. That is, the position of the through hole 21A is the position where the anchor bolt 10 fixed to the lower column 3 of the vertical portion 21 is connected, and the position of the through hole 21B is the position of the anchor bolt fixed to the upper column 4 of the vertical portion 21. 10 is connected.

FIG. 5 is a plan view showing a reinforcing plate 30 as another example of the reinforcing plate. The reinforcing plate 30 is used at the position B or D in FIG. 1, that is, the end position in the horizontal direction (the position where only one of the left and right sides has a base or girders). The reinforcing plate 30 has a substantially right-angled isosceles triangular shape with the left side portion omitted compared to the reinforcing plate 20 . The reinforcing plate 30 has the same structure as the reinforcing plate 20 unless otherwise specified in the following description. The reinforcing plate 30 has a vertical portion 31 arranged in the vertical direction, a horizontal portion 32 arranged in the horizontal direction, and an inclined portion 33 connecting the end of the vertical portion 31 and the end of the horizontal portion 32 . is doing. The vertical portion 31 , the horizontal portion 32 , and the inclined portion 33 are each formed in a linear shape having a predetermined width (70 mm in this embodiment), and the horizontal portion 32 extends from the center of the vertical portion 31 . The reinforcing plate 30 as a whole has a substantially isosceles triangular external shape in which two inclined portions 33 connect the upper and lower ends of the vertical portion 31 and the right end portion of the horizontal portion 32 . As shown in FIG. 5, the corners of the right-angled isosceles triangle are slightly cut off in a straight line, and strictly speaking, the shape is a hexagon. It is called external shape. Between the vertical portion 31 , the horizontal portion 32 and the inclined portion 33 , two triangular (isosceles right triangle) cavities 34 penetrating through the reinforcing plate 20 in the thickness direction are formed.

A fixing hole 31A that penetrates the reinforcing plate 30 in the thickness direction is provided near the lower end of the vertical portion 31 . A fixing hole 31B penetrating through the reinforcing plate 30 in the thickness direction is provided near the upper end of the vertical portion 31 . A fixing hole 32A is provided in the vicinity of the right end of the horizontal portion 32 so as to pass through the reinforcing plate 30 in the thickness direction. A fixing hole 32B is provided near the left end of the horizontal portion 32, that is, near the center of the vertical portion 31. As shown in FIG. It can also be said that the fixing hole 32B is formed at the portion where the vertical portion 31 and the horizontal portion 32 intersect. The vertical portion 31 has three through-holes 31A, 32B, and 31B formed in a straight line in the vertical direction, and the horizontal portion 32 has two through-holes 32A and 32B formed in a straight line in the horizontal direction. can also The inclined portion 33 connects the positions (through holes 31A and 31B) where the anchor bolts 10 are connected on the vertical portion 31 and the positions (through holes 32A) where the anchor bolts 10 are connected on the horizontal portion 32. there is In this embodiment, the inclined portion 33 is inclined at 45° with respect to the vertical portion 31 and the horizontal portion 32 . As a result, the inclined portion 33 formed from the position of the through hole 31A and the inclined portion 33 formed from the position of the through hole 31B are orthogonal to each other. Although the fixing hole 32B can be omitted, the fixing strength can be improved by providing the fixing hole 32B.

A case where the reinforcing plate 30 is fixed at the position B in FIG. 1 will be described below. In this case, the anchor bolt 10 fixed to the foundation 2 is inserted and connected to the fixing hole 31A. Further, the anchor bolt 10 fixed to the lower pillar 3 is inserted through the fixing hole 31B and connected. Anchor bolts 10 fixed to the base 4 are inserted and connected to the fixing holes 32A and 32B. That is, the position of the through hole 31A is the position where the anchor bolt 10 fixed to the base 2 of the vertical portion 21 is connected, and the position of the through hole 31B is the anchor bolt 10 fixed to the lower pillar 3 of the vertical portion 21. is the position where is connected. As described above, the reinforcing plate 30 is connected to the anchor bolts 10 fixed to the lower pillar 3 (wood) and the anchor bolts 10 fixed to the foundation 2 at at least two locations (through holes 31A and 31B) of the vertical portion 31. and is connected to the anchor bolt 10 fixed to the base 5 (wood) in at least one location (through hole 32A) of the horizontal portion 32 .

The case where the reinforcing plate 30 is fixed at the position D in FIG. 1 will be described below. In this case, the anchor bolt 10 fixed to the lower pillar 3 is inserted and connected to the fixing hole 31A. Further, the anchor bolt 10 fixed to the upper pillar 4 is inserted through the fixing hole 31B and connected. Anchor bolts 10 fixed to the girder 7 are inserted and connected to the fixing holes 32A and 32B. That is, the position of the through hole 31A is the position where the anchor bolt 10 fixed to the lower column 3 of the vertical portion 31 is connected, and the position of the through hole 31B is the position of the anchor bolt fixed to the upper column 4 of the vertical portion 31. 10 is connected.

In FIG. 5, the reinforcing plate 30 has a vertical portion 31 located on the left side and two inclined portions 33 located on the right side. However, this arrangement is only one example of the arrangement of the reinforcing plate 30 . It is also possible to rotate the reinforcing plate 30 by 180 degrees from the state shown in FIG. It is also possible to rotate the reinforcing plate 30 by 90° from the state shown in FIG. 5 so that the vertical portion 31 is horizontal and the horizontal portion 32 is vertical.

FIG. 6 is a plan view showing an example of the sealing member 40. As shown in FIG. The sealing member 40 is a rubber member arranged between the reinforcing plate 20 or the reinforcing plate 30 and the wooden building 1 . The sealing member 40 is formed in the shape of a regular octagonal sheet (thin plate). A notch 41 for inserting and penetrating an anchor bolt is formed in the center (center) of the seal member 40 . The seal member 40 has a radial shape extending evenly at 45° intervals in eight directions from the center. By inserting the anchor bolt 10 through the center of the notch 41 , the central portion of the seal member 40 is folded back to match the outer diameter of the anchor bolt 10 .

A hole 42 is formed on the notch 41 of the sealing member 40 to allow the adhesive 11 to escape. The hole 42 is a circular hole with a diameter of about 3 mm that passes through the sealing member in the thickness direction, and is provided at a position corresponding to the outer peripheral surface of the anchor bolt 10 . Here, the position corresponding to the outer peripheral surface is a position in the vicinity of contact with the outer peripheral surface of the threaded portion of the anchor bolt 10 when the anchor bolt 10 is inserted into the center of the seal member 40, and is not necessarily the position of the outer peripheral surface. does not imply an exact match with At least part of the hole 42 should be in contact with the outer peripheral surface of the anchor bolt 1 . By providing the holes 42, even when the adhesive 11 is inserted into the bolt holes in an amount more than necessary, the adhesive 11 escapes to the outside (from the side of the wooden building 1 to the side of the reinforcing plates 20, 30) through the holes 42. be able to. For this reason, the adhesive 11 can be injected into the bolt hole without strictly measuring the amount of the adhesive 11 to be used, thereby improving workability. In addition, if there is no hole 42, the amount of the adhesive 11 used may be insufficient due to the consideration not to inject too much adhesive 11. It is possible to sufficiently inject the adhesive 11 until it is discharged into the groove, thereby ensuring sufficient adhesiveness.

In FIG. 6, only one hole 42 is formed, but the number of holes 42 is not limited to this. The holes 42 may be provided at multiple positions on the seal member 40 . When the holes 42 are provided at a plurality of positions, the plurality of holes may be provided at the same distance from the center of the sealing member (on the dashed line in FIG. 6), or the holes may be formed at slightly different distances from the center. good. By offsetting the distance from the center, it is more likely that either hole will be located on the outer circumference of the anchor bolt 1 even when using anchor bolts 10 with different diameters.

The procedure for mounting the reinforcing structure of the present invention on the wooden building 1 will be described below. The reinforcement plate 20 will be described as an example, but the procedure is the same in the case of the reinforcement plate 30 as well, except that the number of bolts to be fixed is different. First, using a drill or the like, a bolt hole for inserting the anchor bolt 10 is drilled in the horizontal direction at the position where the anchor bolt 10 is to be arranged in the wooden building 1 . With the center of the bolt hole and the center of the seal member 40 aligned, the seal member 40 is fixed to the wooden building 1 with screws or the like. After inserting the adhesive 11 into the bolt hole, one end of the anchor bolt 10 is inserted into the bolt hole from the outside of the seal member 40 . The central portion of the seal member 40 is folded back inward (toward the wooden structure 1 side) at the position of the outer diameter of the anchor bolt 10 . When the anchor bolt 10 is inserted into the bolt hole, the adhesive 11 is pushed out from the bolt hole and discharged to the reinforcing plate 20 side through the hole 42 . After sufficient time (about 3 hours) has passed and the adhesive 11 injected into the bolt hole dries, the anchor bolt 10 is firmly fixed to the bolt hole. The next step may be performed without waiting for the adhesive 11 to dry.

Next, the reinforcing plate 20 is connected (fixed) to the anchor bolt 10 . Since the connection method to the anchor bolts 10 is the same for all of the fixing holes 21A, 21B, 21C, 22A, 22B, and 22C of the reinforcing plate 20, the reinforcing plate 20 is connected to the anchor bolts 10 at the fixing holes 21A below. A case will be described as an example. FIG. 7 is a cross-sectional view showing a state in which the reinforcing plate 20 is fixed to the anchor bolt 10 by welding. The other end of the anchor bolt 10 fixed to the wooden building 1 at one end is inserted into the fixing hole 21A of the reinforcing plate 20 halfway in the plate thickness direction (about the middle position). In this state, the rest of the fixing hole 21A is closed by welding (arc welding). Thereby, the other end side of the anchor bolt 10 and the fixing hole 21A of the reinforcing plate 20 are connected and fixed. A portion formed by welding is called a welded portion 25 . As shown in FIG. 7, the welded portion 25 fills the remaining half of the fixing hole 21A. Thereby, the anchor bolt 10 and the reinforcing plate 20 can be connected and fixed without using nuts. Since the anchor bolt 10 and the reinforcing plate 20 can be connected without exposing the nut to the outside of the reinforcing plate 20, the workability of the wall material and the exterior material is hardly impaired. Moreover, even when the reinforcing structure is exposed to the outside of the wooden building 1, the design of the wooden building 1 is less likely to be spoiled.

Another example of fixing method between the reinforcing plates 20 and 30 and the anchor bolt 10 will be described. FIG. 8 is a cross-sectional view showing a state in which the reinforcing plate 20 is fixed to the anchor bolt 10 with the nut 50. As shown in FIG. A reinforcing plate 20 is inserted through the other end of the anchor bolt 10 fixed to the wooden building 1 at one end. At this time, the reinforcing plate 20 is fixed to the anchor bolt 10 by inserting the nuts 50 into the anchor bolts 10 from both sides of the reinforcing plate 20 and screwing the nuts 50 into screw grooves formed in the anchor bolts 10 . The nuts 50 can firmly fix the reinforcing plate 20 to the anchor bolt 10 by using double nuts arranged two on each side of the reinforcing plate 20 . Seal members 51 and 52 such as washers are inserted between the nut 50 and the reinforcing plate 20 .

As described above, in the reinforced structure of the present invention, the joints of the members of the wooden building, particularly the concrete foundation and the lower pillars and timbers such as the base, are strengthened by a plurality of anchor bolts and reinforcing plates. It is possible to greatly improve the earthquake resistance of wooden buildings by reinforcing them. By fixing the anchor bolt having a relatively large outer diameter to the foundation or the wood with an adhesive, the anchor bolt cannot be easily pulled out even if a considerable force is applied in the pulling direction of the anchor bolt. In addition, since multiple anchor bolts are firmly connected to the high-strength reinforcing plate, even if force is applied in the direction that separates the joints of each member, the reinforcing plate does not deform easily and the joints of each member are maintained. can be done. The reinforcing plate has a vertical portion, a horizontal portion, and an inclined portion, so that the reinforcing structure can be installed at various joints of the wooden building. A triangular (isosceles right triangle) cavity is formed between the vertical section, horizontal section, and inclined section. Although the amount (area) of the plate material forming the reinforcing plate is reduced, the deformation of the reinforcing plate due to the load can be suppressed.

By arranging the sealing member between the reinforcing plate and the wooden building, the adhesion between the reinforcing plate and the anchor bolt can be improved, so that the joints of the wooden building can be connected more firmly. can. In addition, since the sealing member is in close contact with the side of the wooden building, the joint portion between the anchor bolt and the wooden building is less likely to be exposed to the outside, and the joint portion can be protected for a long period of time. A notch is formed in the sealing member, and the anchor bolt is inserted into the bolt hole formed in the wooden structure while the anchor bolt is inserted into the notch of the sealing member. Adhesive is injected into the bolt hole, and when the anchor bolt is inserted into the bolt hole, the adhesive overflows from the bolt hole. Here, since a hole is formed in advance at a position corresponding to the outer peripheral surface of the anchor bolt in the seal member, excess adhesive can escape to the outside through the hole. In this way, when the anchor bolt is inserted into the bolt hole, the adhesive can easily escape, the anchor bolt can be inserted sufficiently deep, and the adhesive can be sufficiently injected into the bolt hole. Furthermore, the adhesive discharged from the bolt holes and the holes of the seal member serves to bond the seal member to the wooden structure and the seal member to the reinforcing plate, thereby further improving the reinforcing performance.

In the above examples, anchor bolts with a diameter of 16 to 20 mm and a total length of 80 to 200 mm are used, but the anchor bolts to be used are not limited to this. The diameter and overall length can be appropriately selected according to the site to be used and the required reinforcement strength.

Although the epoxy resin mortar is used as the adhesive in the above examples, the adhesive is not limited to this. It is also possible to use other resin adhesives or adhesives other than resin adhesives. For example, AR Chemical Setter EX350 manufactured by Sanko Techno Co., Ltd. can be used as an adhesive.

In the above embodiment, the reinforcing plate is made of a single steel plate, but a plurality of steel plates may be combined to form a vertical portion, a horizontal portion, and an inclined portion. Moreover, as long as a member having sufficient strength is used, it is also possible to form the reinforcing plate with a member other than a steel plate.

In the above embodiment, the inclined portion of the reinforcing plate is inclined at 45° with respect to the vertical portion and the horizontal portion, but the angle of inclination is not limited to this. Also, the two slopes do not necessarily have to be perpendicular to each other. Therefore, the present invention can be realized even if the outer shape of the reinforcing plate is not a square or an isosceles right triangle.

In the above embodiment, a triangular (isosceles right triangle) cavity is formed between the vertical portion, the horizontal portion and the inclined portion. Here, a triangular (isosceles right triangle) cavity means that the general shape of the cavity is a triangle (isosceles right triangle). Therefore, isosceles right triangles include those whose right angles are not strictly right angles, those whose lengths of isosceles are not exactly the same, triangles whose vertices are rounded, and triangles whose sides are curved. Triangles also include triangles that have bulges or dents in the middle of each side. Moreover, as long as the reinforcing plate has a vertical portion, a horizontal portion, and an inclined portion, the present invention can be realized even if the shape of the cavity is not triangular.

In the above-described embodiment, the outer shape of the sealing member is a regular octagon, and a radial cut is formed in the center of the sealing member, but the shape of the sealing member is not limited to this. For example, the seal member may be circular in shape. Also, the position where the cut is formed does not necessarily have to be the center of the sealing member. The cut is not limited to a radial shape as long as it has a shape that allows the anchor bolt to pass through. The incisions may have shapes such as linear, circular, and rectangular.

In the above embodiments, the reinforcing structure of the present invention is explained on the premise that it is installed in the middle of construction of a new wooden building. It is also possible to use it as a means for improvement.

In addition, it cannot be overemphasized that this invention is not what is restricted to the said Example. It goes without saying for those skilled in the art that
・Applying the mutually replaceable members and configurations disclosed in the above examples by appropriately changing the combination ・Although not disclosed in the above examples, it is a known technology and the above examples Appropriately replace the members, configurations, etc. that are mutually replaceable with the members, configurations, etc. disclosed in the above, and apply them by changing the combination ・Although not disclosed in the above examples, known techniques It is an embodiment of the present invention that a person skilled in the art can appropriately replace the members and configurations that can be assumed as a substitute for the members and configurations disclosed in the above embodiments based on the above, and change the combination and apply it. It is disclosed as

DESCRIPTION OF SYMBOLS 1... Wooden building, 2... Foundation, 3... Lower pillar, 4... Upper pillar, 5... Foundation, 6... Brace, 7... Girder, 10... Anchor bolt, 11... Adhesive, 20... Reinforcing plate, 21... Vertical portion 22 Horizontal portion 23 Inclined portion 24 Cavity 25 Welded portion 30 Reinforcing plate 31 Vertical portion 32 Horizontal portion 33 Inclined portion 34 Cavity 40 Seal member , 41... notch, 42... hole, 50... nut.

Claims (8)

A reinforcing structure for a wooden building,
a plurality of anchor bolts inserted into a concrete foundation or wood of a wooden building and fixed with an adhesive;
a reinforcing plate connected to the plurality of anchor bolts at a plurality of positions;
The reinforcing plate has a shape having at least a vertical portion arranged in the vertical direction and a horizontal portion arranged in the horizontal direction,
The reinforcing plate is connected to the anchor bolts fixed to the wood and the anchor bolts fixed to the concrete foundation at at least two locations on the vertical portion,
The reinforcing plate is connected to the anchor bolt fixed to the wood at at least one location on the horizontal portion,
The reinforcing plate further has an inclined portion connecting a position where the anchor bolt is connected on the vertical portion and a position where the anchor bolt is connected on the horizontal portion,
A cavity is formed between the vertical portion, the horizontal portion and the inclined portion,
A sealing member is arranged between the reinforcing plate and the wooden building,
A notch for inserting the anchor bolt is formed in the sealing member,
A hole for releasing an adhesive is formed at a position corresponding to the outer peripheral surface of the anchor bolt of the seal member. A reinforcing structure for a wooden building according to claim 1,
The vertical portion, the horizontal portion, and the inclined portion are formed from a single plate. A reinforcing structure for a wooden building according to claim 1,
The cavities are triangular. A reinforcing structure for a wooden building according to claim 1,
The inclined portion formed from the position where the anchor bolt fixed to the wood of the vertical portion is connected, and the position where the anchor bolt fixed to the concrete foundation of the vertical portion is connected. and the inclined portions are perpendicular to each other. A reinforcing structure for a wooden building according to claim 1,
The horizontal portion is connected at least two points with the anchor bolts fixed to the timber,
The inclined portion formed from the position where the anchor bolt fixed to the wood of the vertical portion is connected, and the position where the anchor bolt fixed to the concrete foundation of the vertical portion is connected. characterized in that a shape formed by connecting the sloped portion is a square. A reinforcing structure for a wooden building according to claim 1,
The reinforcing plate is connected to the anchor bolt at a portion where the vertical portion and the horizontal portion intersect. A reinforcing structure for a wooden building according to claim 1,
The anchor bolt is partially inserted into a fixing hole provided in the reinforcing plate, and the rest of the fixing hole is closed by welding, thereby connecting the reinforcing plate and the anchor bolt. Characterized by A reinforcing structure for a wooden building according to claim 1,
the cut formed in the seal member has a radial shape,
The hole is formed on the notch.

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