JP2023020780A - Hold down for four stories - Google Patents

Abstract

To provide a hold-down metal fitting capable of withstanding both a drawing force (tension force) such as an earthquake, a strong wind (typhoon) and a compression force (sinking-in force) at the same time, and further a horizontal force (rolling) in left/right oblique directions and also capable of being used from lower floors to fourth floor.SOLUTION: In a hold down for four stories, two recessed triangle metal fittings arranged in a horizontal line are rotated at 90 degrees each other and covered, and joined by welding to an upper end of an M-shaped reinforcement pole, and similarly the two recessed triangle metal fittings arranged in the horizontal line are rotated at 90 degrees each other, inverted and covered and joined by welding to a lower end of the M-shaped reinforcement pole, wherein the M-shaped reinforcement pole is constituted so that a rectangular flat steel plate is folded symmetrically in a substantially M-shape to be fixed to two adjacent surfaces of the pole, and the recessed triangle metal fitting is constituted such that left and right leg parts of an isosceles trapezoid formed with the flat steel plate are folded at a right angle so as to form a right-angled triangle to a lower bottom and a hole is formed at a substantially central part of a support surface enclosed by an upper bottom and the lower bottom of a central part of the isosceles trapezoid.SELECTED DRAWING: Figure 3

Description

In a wooden building, this invention firmly connects the concrete foundation, the first floor, the upper second floor, the third floor, and the upper fourth floor, and the pull-out force (tensile force) of the wooden building. This relates to an anchor metal fitting that is installed for the purpose of increasing both compression force (penetration force).

Conventionally, in wooden construction, as shown in FIG. 1a of FIG. A structural plywood 5 is attached on the joist 7, a lower frame 6 is attached on the structural plywood 5, and a vertical frame 2 is attached on the upper surface of the lower frame 6. - 特許庁

In order to connect the concrete base 9 and the vertical frame 2 constructed in this way, the hold-down hardware 1 is fixed to the vertical frame 2 with screws 3, and the anchor bolts 10 and the hold-down hardware 1 are fixed with nuts 4. was

Furthermore, as shown in FIG. 1b, in order to construct the first and second floors of the wooden building and the second and third floors above it, the hole-down hardware 22 is turned upside down with screws 23 on the upper part of the vertical frame 24 of the lower floor. In addition, the hold-down hardware 13 is attached to the lower part of the vertical frame 11 on the upper floor with a screw 12, and the hold-down hardware 13 on the upper floor and the hold-down hardware 22 on the lower floor are connected by a connecting bolt 15 and a nut 14. It was fixed at 21.

In the above-mentioned conventional technology, hold-down metal fittings are attached to the vertical frame against the pull-out force (tensile force) due to earthquakes, strong winds (typhoons), etc., to prevent the building from floating or overturning due to earthquakes and strong winds. The hold-down hardware attached to the vertical frame was helpless against the compressive force (penetration force) applied to the building.

However, when a building shakes due to an earthquake, strong wind (typhoon), or the like, compression force (penetration force) and horizontal force (rolling force) are generated in addition to pull-out force (tensile force). Furthermore, horizontal force (rolling) is generated not only on one side of the building, but also on the left and right diagonal directions at the same time. Therefore, the anchor hardware (connecting hardware) using the anchor bolt 10 and the hold-down hardware 13 of FIG. 1 could not exhibit sufficient seismic resistance against lateral shaking of the building in all directions.

In the present invention, both pulling force (tensile force) and compressive force (embedding force) of earthquakes, strong winds (typhoon), etc., as well as horizontal force (rolling) in the left and right diagonal directions can be simultaneously withstood. To provide a hold-down hardware that can be used up to the fourth floor.

In order to solve such a problem, the invention described in claim 1 provides a hold-down hardware for attaching to the column base and column head of a column to prevent the wooden building from overturning during an earthquake or typhoon. In order to fix it to the surface, the M-shaped reinforcing column is made by bending a rectangular flat steel plate symmetrically in an M shape, and the left and right legs of the isosceles trapezoid made of flat steel plate are formed into a right triangle shape with respect to the bottom base. A recessed triangular metal fitting that is bent at a right angle so as to form a hole in the center of the support surface surrounded by the upper and lower bases of the isosceles trapezoid, and the upper end of the M-shaped reinforcing column, The two side-by-side recessed triangular metal fittings are rotated 90 degrees and joined by cover welding. It is characterized in that it is turned 90 degrees, turned upside down, and joined by cover welding.

In addition to the structure described in claim 1, the invention according to claim 2 has a V-shaped central part of the M-shaped reinforcing column in order to attach the M-shaped reinforcing column to two adjacent wall sides of the column. A plurality of holes are formed in the adjacent bent surfaces and fixed to the pillar with a hexagonal coach screw.

In addition to the structure described in claim 1 or 2, the invention according to claim 3 is arranged such that the concave triangular metal fittings are arranged at 90 The lower bases of the supporting surfaces of the two recessed triangular fittings rotated by degrees are joined by welding, and the recessed The bent part of the triangular metal fitting is joined by welding, and one side of the concave triangular metal fitting is joined by welding to the left and right V-shaped bent surfaces of the M-shaped reinforcing column, and the bottom of the other side is joined by welding. It is characterized in that it is welded to the center bent portion of the M-shaped reinforcing column.

According to the invention described in claim 1, in order to prevent a wooden building from overturning during an earthquake or typhoon, the hold-down hardware for attaching to the column base and the column head of the column is fixed to two adjacent surfaces of the column. , M-shaped reinforcing columns made by bending a rectangular flat steel plate symmetrically in an M shape, and the left and right legs of an isosceles trapezoid made of flat steel plate are perpendicular to the bottom base so as to form a right triangle shape. 2 are arranged side by side at the upper end of the M-shaped reinforcing column and the concave triangular metal fitting which is bent and formed with a hole approximately in the center of the support surface surrounded by the upper and lower bases of the central part of the isosceles trapezoid. The concave triangular metal fittings are rotated 90 degrees to each other and joined by cover welding, and similarly, two concave triangular metal fittings arranged side by side are rotated 90 degrees to each other at the lower end of the M-shaped reinforcing column and vertically By reversing and joining by cover welding, it can withstand both pulling force (tensile force) and compressive force (embedding force) due to earthquakes and strong winds (typhoons), as well as horizontal force (rolling) in left and right diagonal directions. It is durable, has a simple structure and is lightweight, so anyone can easily install it.

According to the second aspect of the invention, since the M-shaped reinforcing column is attached to two adjacent wall sides of the column, a plurality of holes are provided in the V-shaped adjacent bent surfaces at the central portion of the M-shaped reinforcing column. and fixed to the column with a hexagonal coach screw, it became possible to firmly fix the M-shaped reinforcing column to the column.

According to the third aspect of the invention, the concave triangular metal fittings are attached to the upper and lower ends of the V-shaped bent surface at the center of the M-shaped reinforcing column so that the two concave portions are rotated by 90 degrees with respect to each other. The lower base of the support surface of the triangular metal fitting is welded, and the bent portions of the concave triangular metal fitting are welded to the upper and lower ends of the curved surfaces of the left and right M-shaped reinforcing columns. Furthermore, one side surface of the concave triangular metal fitting is welded to the left and right V-shaped bent surfaces of the M-shaped reinforcing column, and the lower bottom of the other side is bent at the center of the M-shaped reinforcing column. By joining the parts by welding, it became possible to mass-produce them accurately at the factory.

Embodiments of the present invention will be described below.

2 to 9 show an embodiment of the invention.

FIG. 2 shows in perspective view a pillar 59 of a wooden building and a four-story hall-down 30 for attachment to the pillar 59 . Figure 2a shows in perspective view a four story halldown 30 of the present invention. The four-story hall-down 30 consists of rectangular flat steel plates with a thickness of 2.3 mm, a width of about 280 mm, and a length of about 2496 mm for mounting on the adjacent faces of the pillars 59 shown in FIG. The bent M-shaped reinforcing column 35 and the upper end of the M-shaped reinforcing column 35 are attached with a flat plate steel plate of 6 mm thickness in an isosceles trapezoid (lower base about 387 mm, upper base about 87 mm, height about 150 mm, left and right legs about 212 mm). ), and the left and right legs of the isosceles trapezoid formed in this way are bent at right angles to the lower base so as to form a right triangle shape and formed into a concave shape. The concave triangular metal fitting (A) 33 and the second concave triangular metal fitting (A) 49 are placed side by side with their legs facing downward, and placed on the upper end of the M-shaped reinforcing column 35 while being rotated 90 degrees with respect to each other. Joined by cover welding, and also at the lower end of the M-shaped reinforcing column 35, there are two first concave triangular metal fittings (A) 33 and second concave triangular metal fittings (A) 49 and the same shape. 2, the recessed triangular fitting (B) 39 and the second recessed triangular fitting (B) 43 are turned upside down and placed on the lower end of the M-shaped reinforcing column 35 and joined by welding. FIG. 2b shows a concrete foundation 66, base 65, joists 64, structural plywood 63, and lower frame 62 that constitute the first floor underfloor portion of a wooden building for mounting the four-story hall-down 30 described in FIG. 2a. , pillar 59, upper frame 58, head joint 57, floor frame 56, structural plywood 55, and upper frame 54 that constitute the ceiling portion of the first floor of the wooden building.

FIG. 3 shows the four-story hall-down 30 described in FIG. nut 38, second anchor bolt 42 and second anchor bolt nut 45, first hexagonal coach screw 37 (dimensions M12 x 75 mm), second hexagonal coach screw 46 (dimensions M12 x 75 mm) Further, it shows a state in which the first connecting bolt 34 and the first connecting bolt nut 31 and the second connecting bolt 48 and the second connecting bolt nut 51 are attached.

FIG. 4 shows the four-story hall-down 30 described in FIG. 2a in exploded view in FIG. 4a and in assembled view in FIG. 4b. The M-shaped reinforcing column 35 constituting the four-story hall-down 30 is a rectangular flat steel plate with a thickness of 2.3 mm, a width of about 280 mm, and a length of about 2496 mm, as shown in the drawing of the third triangle in FIG. , a first folded surface (A) 98 with a width of about 60 mm, and then a first folded surface (B) 99 with a width of about 80 mm that is bent at right angles to the first folded surface (A) 98, and then Then, a second folded surface (B) 101 with a width of about 80 mm that is folded at right angles to the first folded surface (B) 99, and then the second folded surface (B) 101 that is folded at right angles to The second folded surface (A) 100 with a width of about 60 mm is formed into an approximately M shape, and the tips at both ends (tip (B) 140 and tip (A) 141 shown in FIG. 7) are folded to increase strength. and approximately on the centerline of the first curved surface (B) 99 and the second curved surface (B) 101, six each for attaching the four-story hall-down 30 to the column 59 (shown in FIG. 2b). mounting holes are molded.

First concave triangular bracket (A) 33, second concave triangular bracket (A) 49, first concave triangular bracket (B) 39, second concave triangular bracket (B) shown in FIG. 4a 43 is a member of the same shape, and the first concave triangular metal fitting (A) 33 is a flat steel plate with a thickness of 6 mm formed into an isosceles trapezoid (lower base about 387 mm, upper base about 87 mm, height about 150 mm, left and right legs 212 mm), and the left and right legs of the isosceles trapezoid formed in this way are bent at right angles to the lower base so as to form a right triangle shape, thereby forming a central rectangle (length of about 87 mm, length of about 87 mm, a first support surface (A) 81 in the shape of a lateral side of about 150 mm) and a left and right isosceles right triangle (the length of each side is about 150 mm and the length of the hypotenuse is about 212 mm). A side surface (A) 82 and a first side surface (B) 83 are molded, and the first support surface (A) 81 has a first fixing hole ( A) 32 is molded. Four thus formed first concave triangular metal fittings (A) 33, second concave triangular metal fittings (A) 49, first concave triangular metal fittings (B) 39, and second concave metal fittings The triangular bracket (B) 43 is a member for attaching the four-story hall-down 30 to the column base and column head of the column 59 (shown in FIG. 2). With respect to the upper end (A) 94, the first reinforcing column upper end (B) 95, the second reinforcing column upper end (B) 96, and the second reinforcing column upper end (A) 97, the first concave A triangular fitting (A) 33 and a second concave triangular fitting (A) 49 are arranged side by side with their legs facing downward and rotated 90 degrees with respect to each other. (C) 102, first concave triangle for first reinforcing column lower end (D) 103, second reinforcing column lower end (D) 104, second reinforcing column lower end (C) 105 The metal fitting (B) 39 and the second concave triangular metal fitting (B) 43 are shown upside down and arranged with the legs facing upward.

4b shows the first concave triangular bracket (A) 33, the second concave triangular bracket (A) 49 and the first concave triangular bracket (B) 39, the second concave The triangular metal fitting (B) 43 is attached to the upper end of the M-shaped reinforcing column 35 (first reinforcing column upper end (A) 94, first reinforcing column upper end (B) 95, second reinforcing column upper end (B) 96). , the second reinforcing column upper end (A) 97), the lower end of the M-shaped reinforcing column 35 (the first reinforcing column lower end (C) 102, the first reinforcing column lower end (D) 103 and the second It shows a state where it is attached to the lower end of the reinforcing column (D) 104 and the lower end of the second reinforcing column (C) 105). A first concave portion 128 is formed with respect to the first reinforcing column upper end (A) 94, the first reinforcing column upper end (B) 95, and the central bent portion 128 at the upper end of the M-shaped reinforcing column 35 described in FIG. The first bent portion (A) 80, the first lower base (A) 85 and the first lower base (B) 84 of the triangular metal fitting (A) 33 are brought into contact with each other to cover the first reinforcing column. The upper end (A) 94, the upper end (B) 95 of the first reinforcing column and the contacting portion of the first concave triangular metal fitting (A) 33 are joined by welding, and the upper end of the M-shaped reinforcing column 35 is welded. The second concave triangular bracket (A) 49 is bent against the second reinforcing column upper end (A) 97, the second reinforcing column upper end (B) 96, and the central bent portion 128. The curved portion (A) 89, the second bottom bottom (A) 87 and the second bottom bottom (B) 92 are brought into contact and covered, and the second reinforcing column upper end (A) 97 and the second reinforcing column The contacting portion of the upper end (B) 96 and the second concave triangular fitting (A) 49 is joined by welding, and similarly, the lower end (C) 102 of the first reinforcing column of the M-shaped reinforcing column 35 and the A first concave triangular metal fitting (B) 39 formed in the same shape as the first concave triangular metal fitting (A) 33 for the first reinforcing column lower end (D) 103 and the central bent portion 128 is turned upside down, the first bent portion (B) 108, the first lower base (C) 106 and the first lower base (D) 111 are brought into contact with each other and covered, and the first reinforcing column The lower end (C) 102, the lower end (D) 103 of the first reinforcing column and the contacting portion of the first concave triangular metal fitting (B) 39 are joined by welding, and further the M-shaped reinforcing column 35 No. 2 reinforcing column lower end (C) 105, second reinforcing column lower end (D) 104, and center bent portion 128 are molded in the same shape as the second concave triangular metal fitting (A) 49. With the second recessed triangular fitting (B) 43 turned upside down, the second bent portion (B) 115, the second bottom (C) 113 and the second bottom (D) 119 are The second reinforcing column lower end (C) 105, the second reinforcing column lower end (D) 104 and the second concave triangular metal fitting (B) 43 are joined by welding. indicates a state in which the

Further, as shown in FIG. 4b, a first bottom (B) 84 at the end of a first side (B) 83 of the first concave triangle (A) 33 and a second concave triangle ( A) Join the second bottom (B) 92 at the end of the second side (B) 91 of 49 by welding, and further join the first bottom (B) 84 and the second bottom (B) 92 is joined to the first bent surface (B) 99 and the second bent surface (B) 101 of the M-shaped reinforcing column 35 by welding, and the first concave triangular metal fitting (B) 39 1 lower base (D) 111 and the second lower base (D) 119 of the second concave triangular metal fitting (B) 43 are joined by welding, and further the joined first lower base (D) 111 By joining the second lower bottom (D) 119 to the first bent surface (B) 99 and the second bent surface (B) 101 of the M-shaped reinforcing column 35 by welding, the upper end of the M-shaped reinforcing column 35 and at the lower end, a first concave triangular metal fitting (A) 33, a second concave triangular metal fitting (A) 49, a first concave triangular metal fitting (B) 39, and a second concave triangular metal fitting (B) 43 can be firmly fixed.

FIG. 5 shows the four-story hall-down 30 explained in FIG. It is attached by a bolt 127, a third connecting bolt nut 124, and a fourth connecting bolt nut 125, and furthermore, a fifth connecting bolt 122 and a sixth connecting bolt are attached to the upper frame 77, the floor frame 78, and the structural plywood 76. 123, the fifth connecting bolt nut 120, and the sixth connecting bolt nut 121 are attached.

FIG. 6 shows the four story hall-down 30 described in FIG. 4 in a third trigonometry drawing.

FIG. 7 shows the M-shaped reinforcing column 35 described in FIG. 4a in a third trigonometry drawing. The first Y mounting hole 148, the second Y mounting hole 149, the third Y mounting hole 150, and the fourth Y mounting hole 151 displayed on the first bent surface (B) 99 in the front view. , a fifth Y-street mounting hole 152, and a sixth Y-street mounting hole 153 for attaching the M-shaped reinforcing post 35 to the wooden building post 59 (shown in FIG. 2) with a hexagonal coach screw 37 (shown in FIG. 4). , the dimension A shown in the plan view indicates the width (approximately 60 mm) of the second reinforcing column upper end (A) 97 of the M-shaped reinforcing column 35 explained in FIG. Dimension B indicates the width (approximately 80 mm) of the second reinforcing column upper end (B) 96 of the M-shaped reinforcing column 35 described in FIG. Dimension C indicates the width (approximately 80 mm) of the first reinforcing column upper end (B) 95 of the M-shaped reinforcing column 35 explained in FIG. Dimension D indicates the width (approximately 60 mm) of the first reinforcing column upper end (A) 94 of the M-shaped reinforcing column 35 described in FIG. Dimension E shown in the front view indicates the dimension (approximately 100 mm) from the upper end of the M-shaped reinforcing column 35 to the first Y-shaped mounting hole 148 . Dimension F indicates the dimension from the first Y mounting hole 148 to the second Y mounting hole 149 (approximately 330 mm). Dimension G indicates the dimension (approximately 400 mm) from the second Y mounting hole 149 to the third Y mounting hole 150 . Dimension H indicates the dimension (approximately 400 mm) from the fourth Y mounting hole 151 to the fifth Y mounting hole 152 . Dimension I indicates the dimension (approximately 330 mm) from the fifth Y mounting hole 152 to the sixth Y mounting hole 153 . A dimension J indicates a dimension (approximately 100 mm) from the lower end of the M-shaped reinforcing column 35 to the sixth Y-shaped mounting hole 153 . Dimension K indicates the dimension from the top end to the bottom end of the M-shaped reinforcing column 35 (approximately 2496 mm). First X mounting holes 142, second X mounting holes 143, third X mounting holes 144, and fourth X mounting holes shown on the second bent surface (B) 101 shown in the left side view Hole 145, fifth X-street mounting hole 146, and sixth X-street mounting hole 147 are also attached to wooden building post 59 (shown in FIG. 2) by attaching M-shaped reinforcing post 35 to hexagonal coach screw 46 (shown in FIG. 4). A first Y mounting hole 148, a second Y mounting hole 148, and a second Y mounting hole 148 for mounting M-shaped reinforcing posts 35 on adjacent X and Y streets of post 59 (shown in FIG. 2) with identical sized hex coach screws. 149, the third Y mounting hole 150, the fourth Y mounting hole 151, the fifth Y mounting hole 152, and the sixth Y mounting hole 153. , the dimension Q is about 130 mm, the dimension R is about 330 mm, the dimension S is about 400 mm, the dimension T is about 400 mm, the dimension U is about 330 mm, and the dimension V is about 130 mm.

FIG. 8 shows the first concave triangular fitting (A) 33 and the second concave triangular fitting (A) 49 attached to the upper end of the M-shaped reinforcing column 35 described in FIG. .

FIG. 9 shows the four-story hall-down 30 described in FIGS. 3 and 5 attached to the corner post of a four-story wooden building.

Although the four-story hall-down according to the present invention has been described above in detail based on the embodiments, the present invention is not limited to the above embodiments and does not depart from the spirit of the invention. Even if various modifications are made within the scope, it goes without saying that they belong to the technical scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a construction example using anchor bolts in a conventional wooden building according to an embodiment of the present invention; FIG. 10 shows a perspective view of a pillar and a four-story hall-down attached to the pillar according to the same embodiment. FIG. 3 is a perspective view showing a state in which a four-story hall-down is attached to the pillar shown in FIG. 2 according to the same embodiment. FIG. 2 shows perspective views of a four-story hall-down according to the same embodiment, in an exploded state and an assembled state. FIG. 5 is a perspective view showing a state in which the four-story hold-down shown in FIG. 4 according to the same embodiment is attached to a pillar on the second floor. The four-story hall-down shown in FIG. 4 according to the same embodiment is shown in the third trigonometry. The M-shaped reinforcing column of the four-story hold-down shown in FIG. The drawing of the third trigonometry shows two concave triangular fittings attached to the upper end of the four-story hall-down shown in FIG. 4 according to the same embodiment. FIG. 2 is a perspective view showing a state in which a four-story hold-down according to the same embodiment is attached to a corner post of a four-story wooden building.

A Dimension B Dimension C Dimension D Dimension E Dimension F Dimension G Dimension H Dimension I Dimension J Dimension K Dimension L Dimension M Dimension N Dimension O Dimension P Dimension Q Dimension R Dimension S Dimension T Dimension U Dimension V Dimension 1 Hold-down hardware 2 Frame 3 Screw 4 Nut 5 Structural plywood 6 Lower frame 7 Joist 8 Foundation 9 Concrete foundation 10 Anchor bolt 11 Vertical frame 12 Screw 13 Hold-down hardware 14 Nut 15 Connecting bolt 16 Structural plywood 17 Lower frame 18 Floor frame 19 Head connection 20 Upper frame 21 Nut 22 Hold-down hardware 23 Screw 24 Vertical frame 30 Four-story hold-down 31 First connecting bolt nut 32 First frame fixing hole (A)
33 First concave triangular bracket (A)
34 First connecting bolt 35 M-shaped reinforcing column 36 First column mounting hole 37 First hexagonal coach screw 38 First anchor bolt nut 39 First recessed triangular bracket (B)
40 First frame fixing hole (B)
41 First anchor bolt 42 Second anchor bolt 43 Second recessed triangular fitting (B)
44 Second frame fixing hole B
45 Second anchor bolt nut 46 Second hexagonal coach screw 47 Second pillar mounting hole 48 Second connecting bolt 49 Second recessed triangular fitting (A)
50 Second frame fixing hole (A)
51 Second connecting bolt nut 52 First lower frame hole 53 Second lower frame hole 54 Lower frame 55 Structural plywood 56 Floor frame 57 Head joint 58 Upper frame 59 Column 60 Third lower frame hole 61 Fourth Lower frame hole 62 Lower frame 63 Structural plywood 64 Joist 65 Foundation 66 Concrete foundation 73 Upper frame 74 Floor frame 75 Structural plywood 76 Lower frame 77 Upper frame 78 Floor frame 79 Structural plywood 80 First bent portion (A)
81 first support surface (A)
82 first side (A)
83 first side (B)
84 first lower base (B)
85 First Lower Base (A)
86 first arrow 87 second lower base (A)
88 second support surface (A)
89 Second bent portion (A)
90 second aspect (A)
91 Second aspect (B)
92 Second lower base (B)
93 Second arrow 94 Upper end of first reinforcing column (A)
95 Upper end of first reinforcing column (B)
96 Upper end of second reinforcing column (B)
97 Upper end of second reinforcing column (A)
98 first folding surface (A)
99 first folding surface (B)
100 second folding surface (A)
101 second folding surface (B)
102 Lower end of first reinforcing column (C)
103 Lower end of first reinforcing column (D)
104 Lower end of second reinforcing column (D)
105 Lower end of second reinforcing column (C)
106 first lower base (C)
107 first side (C)
108 first bent portion (B)
109 first support surface (B)
110 first side (D)
111 first lower base (D)
112 third arrow 113 second lower base (C)
114 second side (C)
115 Second bent portion (B)
116 second support surface (B)
117 Second aspect (D)
118 fourth arrow 119 second lower base (D)
120 fifth connecting bolt nut 121 sixth connecting bolt nut 122 fifth connecting bolt 123 sixth connecting bolt 124 third connecting bolt nut 125 fourth connecting bolt nut 126 third connecting bolt 127 fourth connecting bolt 128 center bent portion 140 tip (B)
141 Tip (A)
142 First X mounting hole 143 Second X mounting hole 144 Third X mounting hole 145 Fourth X mounting hole 146 Fifth X mounting hole 147 Sixth X mounting hole 148 1 Y mounting hole 149 2nd Y mounting hole 150 3rd Y mounting hole 151 4th Y mounting hole 152 5th Y mounting hole 153 6th Y mounting hole 160 vertical frame 4th floor 161 Vertical frame 3rd floor 162 Vertical frame 2nd floor 163 Vertical frame 1st floor 164 Vertical frame 4th floor 165 Vertical frame 3rd floor 166 Vertical frame 2nd floor 167 Vertical frame 1st floor

Claims (3)

In order to prevent wooden buildings from overturning during earthquakes and typhoons, hold-down metal fittings for attaching to column bases and column capitals,
An M-shaped reinforcing column made by bending a rectangular flat steel plate symmetrically in an M shape in order to fix it to two adjacent sides of the column;
The left and right legs of an isosceles trapezoid formed of a flat steel plate are bent at right angles to the lower base so as to form a right triangle shape, and the support surface surrounded by the upper base and the lower base of the central part of the isosceles trapezoid A recessed triangular metal fitting with a hole molded roughly in the center of the
On the upper end of the M-shaped reinforcing column, two concave triangular metal fittings arranged side by side are rotated 90 degrees and joined by cover welding, and similarly, they are arranged side by side on the lower end of the M-shaped reinforcing column. A four-storied hold-down characterized in that two concave triangular metal fittings are rotated 90 degrees to each other, turned upside down, and joined by cover welding. In order to attach the M-shaped reinforcing column to two adjacent wall sides of the column, a plurality of holes are formed in the V-shaped adjacent bent surfaces at the center of the M-shaped reinforcing column and fixed to the column with a hexagonal coach screw. 2. A four story hall down according to claim 1. The recessed triangular metal fittings are welded to the upper and lower ends of the central V-shaped bent surface of the M-shaped reinforcing column, and the lower bases of the supporting surfaces of the two recessed triangular metal fittings rotated 90 degrees are welded to each other. Furthermore, the bent portions of the concave triangular metal fittings are joined by welding to the upper and lower ends of the left and right bent surfaces of the M-shaped reinforcing column. The side surface is welded to the left and right V-shaped bent surfaces of the M-shaped reinforcing column, and the bottom bottom of the other side is welded to the center bent portion of the M-shaped reinforcing column. A four-story hall down according to claim 1 or 2.

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