Reinforcement structure for wooden buildings

Abstract

To provide a reinforcement structure for a wooden building which can easily perform partial reinforcement with a simple configuration and can suppress deterioration of the appearance. [Solution] A reinforcing structure 26A for a wooden building comprises a flat first plate 30 having a length extending in front of and behind the intersection of a through column 6 and a girth 8 and fixed to the through column 6 with a plurality of coach screw bolts 28, and a pair of flat second plates 32L, 32R arranged on either side of the intersection so as to be perpendicular to the first plate 30 and fixed to the girth 8 with a plurality of coach screw bolts 28, the first plate having a plate insertion portion 34, one of the pair of second plates 32L, 32R having a flat connecting plate 36 inserted into the plate insertion portion 34, and the other having a plate accommodating portion 37 for accommodating the tip of the connecting plate 36 inserted into the plate insertion portion 34.

Description

[Technical field]

[0001] This invention relates to a reinforcement structure for wooden buildings, which reinforces the intersections between pillars, such as through columns, and cross members, such as girder beams, in wooden buildings such as wooden frame houses. [Background technology]

[0002] In wooden buildings, especially two- or three-story wooden houses, pillars such as through columns and tubular columns are used, and these pillars are connected to cross members such as beams, girders, and girder beams in a cross-shaped manner. At such joints, a tenon is inserted into a mortise hole to fit together, and this inevitably reduces the strength. Strength is particularly reduced in structures in which the through columns are separated into upper and lower parts by the girder beam. For this reason, there is a concern that when a large earthquake or strong wind (typhoon) hits, the weak joints (intersections) will be damaged, which will cause distortion in the entire frame, causing the house itself to tilt or collapse.

[0003] To address this problem, Patent Document 1 discloses a reinforcement device for wooden frame houses in which horizontal frames made of multiple channel steel are connected in series from above the girths around the perimeter of the wooden frame house and fixed to the girths with set screws, and fixed to the beams at the joints with set screws that pass through the girths. At the points corresponding to the corners, vertical frame members extending along the length of the columns are fixed to the columns with set screws and are connected to the horizontal frames with bolts via auxiliary members. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-321499 A Summary of the Invention [Problem to be solved by the invention]

[0005] In a configuration such as the reinforcing device described in Patent Document 1, in which channel steel is bolted to girder beams around the entire outer perimeter of a wooden frame house, the reinforcing structure becomes large-scale and the channel shape is exposed to the outside, making the appearance unattractive.

[0006] The present invention has been made in consideration of the above-mentioned points, and its purpose is to provide a reinforcement structure for a wooden building that can easily provide partial reinforcement with a simple configuration and suppresses the deterioration of the appearance. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the reinforcing structure (26A) for a wooden building of the present invention is a reinforcing structure for a wooden building that reinforces an intersection portion (24) between a pillar member (6) and a cross member (8), and is characterized in that it comprises a flat first plate (30) having a length including the intersection portion (24) and extending in front of and behind it, and fixed to the pillar member (6) or the cross member (8) with a plurality of bolts (28), and a pair of flat second plates (32L, 32R) arranged on both sides of the first plate (30) so as to be perpendicular to the first plate (30) across the intersection portion (24), and fixed to the pillar member (6) or the cross member (8) with a plurality of bolts (28), wherein the first plate (30) has a plate insertion portion (34), and at least one of the pair of second plates (32L, 32R) has a flat connecting plate (36) inserted into the plate insertion portion (34).

[0008] According to the reinforcement structure for wooden buildings of the present invention, partial reinforcement can be easily achieved with a simple configuration.

[0009] In addition, in the above-mentioned reinforcement structure (26A) for a wooden building, the intersection portion (24) may be a planar intersection, and one of the pair of second plates (32L, 32R) may have a connecting plate (36), and the other may have a plate accommodating portion (37) that accommodates the tip of the connecting plate (36) inserted into the plate insertion portion (34). This allows for easy installation and facilitates mechanical connection between the first plate and the pair of second plates.

[0010] Also, in the above-mentioned reinforcement structure (26B) for a wooden building, the intersection portion (48) may be a corner intersection, the first plate (50) is bent at a right angle, and each face (50a, 50b) is fixed to the adjacent faces (6a, 6b) of the pillar material (6) with a plurality of bolts (28) and each has a plate insertion portion (52), and the pair of second plates (32L, 32R) are fixed to the cross members (8) and each has a connecting plate (36). This allows partial reinforcement to be easily achieved with a simple structure even at corners.

[0011] In addition, in the above-mentioned reinforcement structure for wooden buildings (26A, 26B), the cross members may be configured as girths (8). This allows the weaker parts to be easily reinforced with a simple structure.

[0012] The above-mentioned reinforcement structure (26A, 26B) for a wooden building may have a first hook member (38) sandwiched between the first plate (30) and the pillar member (6) or the cross member (8), a first cover member (40) attached via the first hook member (38) and covering the first plate (30), a second hook member (42) sandwiched between a pair of second plates (32L, 32R) and the pillar member (6) or the cross member (8), and a pair of second cover members (44L, 44R) attached via the second hook member (42) and covering the pair of second plates (32L, 32R), respectively. This can prevent the appearance from becoming inferior after construction.

[0013] In the above-mentioned reinforcement structure (26A, 26B) for a wooden building, the first hook member (38) and the second hook member (42) may have engagement pieces (38b, 42b, 42c) that elastically deform when the first cover member (40, 54) and the second cover member (44L, 44R) are attached to each other and come into contact with the inner surfaces of the first cover member (40, 54) and the second cover member (44L, 44R). This allows the cover members to be attached by a simple pushing operation and to be held in place by elastic force. Effect of the Invention

[0014] According to the present invention, it is possible to easily reinforce the parts that need to be reinforced with a simple structure, and to prevent the appearance from becoming poor after construction. [Brief description of the drawings]

[0015] [Figure 1] 1 is a schematic front view showing a part of a wooden frame house having a reinforcement structure for a wooden building according to a first embodiment of the present invention; [Diagram 2] FIG. 2 is an exploded perspective view of the reinforcing structure for the wooden building shown in FIG. 1. [Diagram 3] FIG. 2 is a perspective view of a main part showing a state after the reinforcement structure for the wooden building shown in FIG. 1 has been fixed. [Figure 4] FIG. 2 is a perspective view of a main part showing a completed construction state of the reinforcement structure for the wooden building shown in FIG. [Diagram 5] FIG. 4 is a cross-sectional view of a main part showing the mounting configuration of the first cover member in the reinforcement structure of the wooden building shown in FIG. 1 (corresponding to the V1-V1 cross section in FIG. 4), where (a) is a view showing the state before mounting, and (b) is a view showing the state after mounting. [Figure 6] FIG. 4 is a cross-sectional view of a main part showing the mounting configuration of the second cover member in the reinforcement structure of the wooden building shown in FIG. 1 (corresponding to the V2-V2 cross section in FIG. 4), in which (a) is a view showing the state before mounting, and (b) is a view showing the state after mounting. [Figure 7] FIG. 4 is a perspective view of a main part of a reinforcement structure for a wooden building according to a second embodiment of the present invention, showing the state after being fixed. [Figure 8] FIG. 8 is an exploded perspective view of the reinforcing structure for the wooden building shown in FIG. 7. [Figure 9] FIG. 8 is a perspective view of a main part showing a completed construction state of the reinforcement structure for the wooden building shown in FIG. 7. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0017] [First embodiment] FIG. 1 shows a part of a two-story wooden frame house 2. In FIG. 1, F1 indicates the first floor, and F2 indicates the second floor. The wooden frame house 2 is composed of a foundation 4, a through column 6, a girder 8, a pipe column 10, an eaves beam 12, a diagonal brace 14, a partition 16, a window sill 18, a diagonal brace 20, and the like. As shown by an imaginary circle 22, a cross section 24 (shown by hatching) formed by a planar crossing of the through column 6 as a column material and the girder 8 as a cross member is reinforced by construction of a reinforcing structure 26A of a wooden building according to this embodiment. The outer surface of the wooden frame house 2 is actually covered with a mortar wall 46 (see FIG. 5), and the column material and the cross member are not visible. In FIG. 1, the arrow X direction is the horizontal direction or the left-right direction, and the arrow Y direction is the up-down direction. In the following, the reinforcing structure 26A of a wooden building is simply abbreviated as the reinforcing structure 26A.

[0018] As shown in FIG. 2, the reinforcing structure 26A includes a first plate 30 made of metal and flat, which has a length extending in the front-rear direction (here, vertical direction) including the intersection portion 24 and is fixed to the through-column 6 by a plurality of bolts 28, and a pair of second plates 32L, 32R made of metal and flat, which are arranged on both sides (here, left and right) of the first plate 30 so as to be perpendicular to the first plate 30 across the intersection portion 24 and are fixed to the girth 8 by a plurality of bolts 28. The first plate 30 has a plate insertion portion 34 on the surface of a portion corresponding to the intersection portion 24, and at least one of the pair of second plates 32L, 32R, here the second plate 32L on the left side in the figure, has a metal flat connecting plate 36 inserted into the plate insertion portion 34. The other of the pair of second plates 32L, 32R, the right second plate 32R, has a plate accommodating portion 37 at its left end portion for accommodating the tip of the connecting plate 36 inserted into the plate insertion portion 34.

[0019] The first plate 30, the second plates 32L, 32R, and the connecting plate 36 each have the same thickness. The first plate 30 has a plurality of bolt insertion holes 30a formed in the vertical direction while being alternately shifted left and right. Reference numeral 30b denotes a temporary fixing screw hole. The bolt 28 inserted into the bolt insertion hole 30a, penetrates the mortar wall 46, and is screwed into the through-column 6 is a coach screw bolt. The plate insertion portion 34 is formed by bending a metal plate into a U-shaped cross section, and is fixed to the first plate 30 by welding with the left and right open. The pair of second plates 32L, 32R have a plurality of bolt insertion holes 32a formed in the horizontal direction while being alternately shifted up and down. Reference numeral 32b denotes a temporary fixing screw hole. The connecting plate 36 is fixed to the right end of the left second plate 32L so as to protrude toward the intersection portion 24. The plate accommodating portion 37 is formed by bending a metal plate into a U-shaped cross section, similar to the plate insertion portion 34, and is fixed to the second plate 32R by welding with the left and right sides open. The internal space of the plate insertion portion 34 and the plate accommodating portion 37 is set to a size that allows the connecting plate 36 to be inserted smoothly and without rattling. The length m of the connecting plate 36 protruding from the second plate 32L is set to a size that protrudes slightly to the right from the plate accommodating portion 37 when the first plate 30 and the second plates 32L, 32R are assembled and fixed.

[0020] The reinforcing structure 26A also has two first hook members 38 that are sandwiched and spaced apart in the width direction (left-right direction) of the first plate 30 between the first plate 30 and the through column 6, more precisely between the upper end of the first plate 30 and the mortar wall 46, a first cover member 40 that is attached via the first hook members 38 and covers the first plate 30, a second hook member 42 that is sandwiched and positioned between the pair of second plates 32L, 32R and the girder 8, more precisely between the left and right ends of each of the second plates 32L, 32R and the mortar wall 46, and a pair of second cover members 44L, 44R that are attached via the second hook members 42 and cover the second plates 32L, 32R, respectively.

[0021] The first cover member 40 is made of a thin metal plate and has a U-shaped cross section, the upper end of which is closed by a side surface 40a with which the first hook member 38 engages, and the lower end is open. In addition, a notch recess 40b is formed on both side surfaces of the center of the first cover member 40 in the vertical direction to avoid interference with the second plates 32L and 32R. The left second cover member 44L is made of a thin metal plate and has a U-shaped cross section like the first cover member 40, the left end of which is closed by a side surface 44La, and the right end of which is open to avoid interference with the connecting plate 36. The second cover member 44R is also made of a thin metal plate and has a U-shaped cross section like the first cover member 40, the right end of which is closed by a side surface 44Ra, and the left end of which is open to avoid interference with the connecting plate 36. The upper and lower side surfaces 44Lb, 44Lc, 44Rb, and 44Rc of the second cover members 44L and 44R engage with the second hook member 42, respectively.

[0022] FIG. 3 shows a state in which the first plate 30 is fixed to the through-post 6 via a mortar wall 46, and the pair of second plates 32L, 32R are fixed to the girth 8 via the mortar wall 46 with the bolts 28. First, the first plate 30 is temporarily fixed to the through-post 6 with a fixing screw (not shown) through the temporary fixing screw hole 30b to position it, and then fixed with the bolts 28. Then, the second plate 32L is temporarily fixed to the girth 8 with a fixing screw (not shown) through the temporary fixing screw hole 32b in a state in which the connecting plate 36 is inserted through the plate insertion portion 34, and then fixed with the bolts 28. Next, the right second plate 32R is temporarily fixed to the girth 8 with a fixing screw (not shown) through the temporary fixing screw hole 32b in a state in which the tip of the connecting plate 36 is accommodated in the plate accommodation portion 37, and then fixed with the bolts 28. In this case, the second plate 32R may be fixed first, and then the second plate 32L may be fixed.

[0023] As described above, the first plate 30, the second plates 32L, 32R, and the connecting plate 36 have the same thickness, so that when the second plate 32L is arranged, there is no step between the first plate 30 and the connecting plate 36, and the connecting plate 36 can be smoothly inserted into the plate insertion portion 34. Also, when the second plate 32R is arranged, the connecting plate 36 can be smoothly accommodated in the plate accommodating portion 37. Since the second plates 32L, 32R can be fixed individually, the installation work is easy, and even if there is some positioning error in the left-right direction, it can be absorbed by the non-fixed sliding configuration of the connecting plate 36 with respect to the plate insertion portion 34 and the plate accommodating portion 37. By such a simple assembly, the first plate 30 and the second plates 32L, 32R can be mechanically connected, and the reinforcing structure 26A that is resistant to bending and the like can be easily and simply constructed.

[0024] The reinforcing structure 26A is substantially completed in terms of function as shown in Fig. 3, but in this embodiment, in order to suppress poor appearance, the outer surfaces of the first plate 30 and the second plates 32L, 32R are covered with the first cover member 40 and the second cover member 44L, 44R. Fig. 4 shows the appearance after the first cover member 40 and the second cover member 44L, 44R are fitted. The first cover member 40 and the second cover member 44L, 44R can be attached by simply pushing them from the front side of the corresponding first plate 30 and second plate 32L, 32R, respectively. This is so-called snap fitting.

[0025] As shown in FIG. 5(a), the first hook member 38 is composed of a clamping piece 38a extending in the vertical direction and clamped between the first plate 30 and the mortar wall 46, and an engagement piece 38b that bends outward from the upper end of the clamping piece 38a and extends to the outside and elastically deforms when the first cover member 40 is attached to abut against the inner surface of the first cover member 40, specifically, the inner surface of the side surface 40a. As shown in FIG. 5(b), when the first cover member 40 is pushed in from the front of the first plate 30, the engagement piece 38b elastically deforms downward to abut against the inner surface of the side surface 40a. The lower part of the first cover member 40 is positioned by the engagement of the notched recess 40b with the second plates 32L and 32R, so that the first cover member 40 is held by the elastic force of the first hook member 38.

[0026] As shown in Fig. 6(a), the second hook member 42 is composed of a clamping piece 42a extending in the vertical direction and clamped between the second plate 32L, 32R and the mortar wall 46, and engagement pieces 42b, 42c that extend outwardly from the upper and lower ends of the clamping piece 42a and elastically deform when the second cover members 44L, 44R are attached to abut against the inner surfaces of the second cover members 44L, 44R, specifically the inner surfaces of the upper and lower side surfaces 44Lb, 44Lc, 44Rb, 44Rc. As shown in Fig. 6(b), when the second cover members 44L, 44R are pushed in, the engagement piece 42b elastically deforms downward and the engagement piece 42b elastically deforms upward to abut against the inner surfaces of the upper and lower side surfaces 44Lb, 44Lc, 44Rb, 44Rc. As a result, both ends of the second cover members 44L, 44R are stably held by the elastic force of the second hook member 42.

[0027] After fitting the first cover member 40 and the second cover members 44L, 44R, they are masked with masking tape, and the boundaries between these cover members and the mortar wall 46 and the boundaries between the first cover member 40 and the second cover members 44L, 44R are filled with caulking material to perform waterproofing, etc. If there is a color difference with the mortar wall 46, the first cover member 40 and the second cover members 44L, 44R can be painted with paint of the same color as the mortar wall 46. If the material color of the first cover member 40 and the second cover members 44L, 44R is similar to the color of the mortar wall 46, color adjustment (painting) is not necessary.

[0028] [Second embodiment] The second embodiment will be described with reference to Figures 7 to 9. The same parts as those in the first embodiment are designated by the same reference numerals, and the explanation of the configuration and function already given will be omitted as appropriate unless otherwise necessary.

[0029] 7, in the reinforcing structure 26B according to this embodiment, the intersection 48 is formed as a corner intersection where two girths 8 intersect with the through-post 6. The first plate 50 is bent at a right angle, and each face 50a, 50b is fixed to the adjacent faces 6a, 6b of the through-post 6 with a plurality of bolts 28, respectively, and has a plate insertion portion 52 on the surface of the part corresponding to the intersection 48. The pair of second plates 32L, 32R are each fixed to the girths 8 with a plurality of bolts 28, and have a connecting plate 36 on the intersection 48 side.

[0030] As shown in Fig. 8, the first cover member 54 covering the first plate 50 also has a curved shape corresponding to the first plate 50, and its upper end is closed by a curved side surface 54a with which the first hook member 38 engages. A notched recess 54b is formed on both side surfaces of the center portion in the vertical direction of the first cover member 54 to avoid interference with the second plates 32L, 32R. In Fig. 8, reference numeral 50c denotes a bolt insertion hole, and 50d denotes a temporary fixing screw hole.

[0031] After the first plate 50 is fixed to the through-column 6, each of the second plates 32L, 32R is fixed by inserting the connecting plates 36 into the plate insertion portions 52. This essentially completes the reinforcement structure 26B at the corner intersection. In this embodiment as well, the first plate 50 and the second plates 32L, 32R can be mechanically connected by simple assembly, and the reinforcement structure 26B that is resistant to bending and the like can be easily and simply constructed.

[0032] 9 shows the external appearance after the first cover member 54 and the second cover members 44L, 44R are fitted together. The first cover member 54 and the second cover members 44L, 44R can be attached by simply pushing them together, as in the first embodiment, and waterproofing and color adjustment after fitting are also performed in the same manner.

[0033] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible within the scope of the technical ideas described in the utility model claims and the specification and drawings. For example, in the first embodiment, the first plate 30 is fixed to the through-column 6 as a column material, but it may be fixed to the girth 8 and the pair of second plates 32L, 32R may be fixed to the through-column 6. In addition, the construction is performed from the surface of the mortar wall 46, but in the case of a siding wall, since there is a heat insulating material on the inside, the siding wall is cut and directly fixed to the column material or cross member on the inside. The above example shows the construction on an existing wooden building, but the same reinforcing function can be obtained by directly constructing the cross member of the column material at the time of new construction.

[0034] In addition, in each of the above embodiments, the example of construction at the intersections 24, 48 between the through column 6 and the girth 8 is shown, but it is not limited thereto, and can be implemented at various intersections (including flat intersections and corner intersections) between pillar materials such as the pipe column 10 and horizontal members other than the girth 8. In addition, in a three-story wooden house, it is originally good to use a through column with a length of 6 m, but in some cases, 3 m through columns are fixed above and below the girth to reduce costs. Since the strength is reduced in such a configuration, construction of the reinforcing structures 26A, 26B according to the present invention is particularly suitable in such an example. In addition, the material of the first plate 30, etc. is not limited to metal, and it may be any material having the same mechanical strength as metal. [Explanation of symbols]

[0035] 2 Wooden frame house (wooden building) 6 Through pillars (pillar material) 8. Cross beam 10 Pipe Post 16 Studs 24, 48 Crossing site 26A, 26B Reinforcement structure for wooden buildings 28 Bolt (coach screw bolt) 30, 50 1st plate 32L, 32R 2nd plate 34, 52 Plate insertion part 36 Connecting plate 37 Plate storage section 38 First hook member 38a Clamping piece 38b Engagement piece 42 Second hook member 42a Clamping piece 42b, 42c engaging piece 46 Mortar Wall

Claims

1. A reinforcement structure for a wooden building that reinforces the intersections between columns and cross members, A flat first plate having a length including the intersection portion and extending in front and behind the intersection portion and fixed to the column material or the cross member with a plurality of bolts; A pair of flat second plates are arranged on both sides of the first plate so as to be perpendicular to the first plate across the intersection and are fixed to the column or the cross member with a plurality of bolts; Equipped with A reinforcement structure for a wooden building, characterized in that the first plate has a plate insertion portion, and at least one of the pair of second plates has a flat connecting plate inserted into the plate insertion portion.

2. The reinforcement structure for a wooden building as described in claim 1, characterized in that the intersection portion is a planar intersection, one of the pair of second plates has the connecting plate, and the other has a plate accommodating portion that accommodates the tip of the connecting plate inserted into the plate insertion portion.

3. The reinforcement structure for a wooden building as described in claim 1, characterized in that the intersection portion is a corner intersection, the first plate is bent at a right angle and each face is fixed to an adjacent face of the column material with a plurality of bolts and each has the plate insertion portion, and the pair of second plates are each fixed to the cross member and have the connecting plate.

4. A reinforcement structure for a wooden building according to any one of claims 1 to 3, characterized in that the cross member is a girder.

5. The reinforcement structure for a wooden building described in any one of claims 1 to 3, characterized in that it comprises a first hook member sandwiched between the first plate and the pillar material or the cross member, a first cover member attached via the first hook member and covering the first plate, a second hook member sandwiched between the pair of second plates and the pillar material or the cross member, and a pair of second cover members attached via the second hook member and respectively covering the pair of second plates.

6. The reinforcement structure for a wooden building as described in claim 5, characterized in that the first hook member and the second hook member have engaging pieces that elastically deform when the first cover member and the second cover member are attached and abut against the inner surfaces of the first cover member and the second cover member.

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