Endurance wall

Abstract

To provide a bearing wall which can tension a diagonal member even if the diagonal member is a flat bar.SOLUTION: A bearing wall 1 is connected to connection members 3 and 4 where mounting parts 21 and 22 provided at both ends of a flat bar 2 that is a diagonal member are fixed to a skeleton of a building. The mounting part 22 on one side of the flat bar 2 has an insertion hole 22c in a central line direction of the flat bar 2. The mounting part 22 and the connection member 4 are connected to each other by a male screw part 5 passing through the insertion hole 22c, and a female screw part 43a screwed with the male screw part 5. The mounting part 22 is pulled to the side of the connection member 4 by movement generated by screwing of the male screw part 5 and the female screw part 43a.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] This invention relates to a bearing wall reinforced against horizontal loads by diagonal members. [Background technology]

[0002] Known shear walls include structures that use turnbuckle braces as diagonal members and structures that use flat bars. Patent Document 1 also discloses a shear wall that uses square steel pipes as diagonal members. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2017-179989 Summary of the Invention [Problem to be solved by the invention]

[0004] However, shear walls using the turnbuckle braces are expensive because they require turnbuckles to tension the braces. On the other hand, shear walls using flat bars cannot use turnbuckles, so the flat bars cannot be tensioned. This means that initial tension cannot be applied to the flat bars, and the flat bars can bend due to manufacturing and construction inaccuracies, resulting in low initial rigidity of the shear walls. Similar problems exist in structures where the diagonal members are square steel pipes.

[0005] An object of the present invention is to provide a bearing wall that can tension diagonal members even if they are flat bars or the like. [Means for solving the problem]

[0006] The shear wall of this invention is a shear wall in which the attachment parts provided at both ends of the diagonal members are connected to connecting members fixed to the skeleton of the building, The mounting portion on one side of the diagonal member has an insertion hole in the center line direction of the diagonal member, the mounting portion on one side and the connecting member are spaced apart in the center line direction, a male screw portion provided on either the mounting portion on one side or the connecting member and passed through the insertion hole is screwed into a female screw portion on the other side, The mounting portion on one side is pulled toward the connecting member by movement of either the male screw portion or the female screw portion due to the screw engagement.

[0007] With the above configuration, the movement of either the male screw portion or the female screw portion due to the screwing together pulls the mounting portion on one side toward the connecting member, so even in a structure that uses a flat bar, square steel pipe, etc. as the diagonal member, the flat bar can be tensioned.

[0008] The one-side mounting portion may have a plate portion located at a distance from the end face of the diagonal member, and the plate portion may have the insertion hole in it. In this way, the male screw portion or the female screw portion can be provided on the one-side mounting portion at the distance.

[0009] The other mounting portion located opposite the one side may be fixed to the connecting member by a bolt screwed into the wall surface of the bearing wall in a direction perpendicular to the wall surface of the bearing wall. This allows the other mounting portion to be easily connected using the shear strength of the bolt, improving workability in on-site construction of the bearing wall.

[0010] The connecting member to which the mounting portion on one side is connected may have the female screw portion, and a headed bolt, which is the male screw portion provided on the mounting portion on one side, may be inserted into the insertion hole and screwed into the female screw portion.

[0011] Alternatively, the connecting member to which the mounting portion on one side is connected may have the male screw portion, and the nut, which is the female screw portion provided on the mounting portion on one side, may be screwed onto the male screw portion inserted into the insertion hole.

[0012] In the shear wall, rotation of the diagonal member at the mounting portion on one side about the center line thereof may be prevented by a locking portion provided on the mounting portion being locked to the connecting member, thereby preventing twisting of the diagonal member when the diagonal member is tensioned by threading the male screw portion and the female screw portion together.

[0013] The locking portion may be located closer to the column of the frame than the male and female threads, which allows the male threads to be positioned and operated from the side where the column is not located, improving workability in constructing the bearing wall. [Effects of the Invention]

[0014] With the present invention, tensioning is possible even in structures that use flat bars or the like as diagonal members, and initial tension can be introduced into the diagonal members.Furthermore, deflection of the diagonal members due to manufacturing and construction inaccuracies can be eliminated, thereby achieving the effect of increasing the initial rigidity of the shear wall. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is an explanatory diagram showing the internal structure of a bearing wall using flat bars of an embodiment as diagonal members. [Figure 2] FIG. 2 is a schematic perspective view showing the tensioning attachment of the flat bar of FIG. 1; [Figure 3] This shows the connection of the tensioning attachment part of the shear wall in Figure 1 to the lower connecting member, where Figure (A) is an explanatory diagram showing the attachment part separated from the lower connecting member, and Figure (B) is an explanatory diagram showing the connected state. [Figure 4] This shows the connection of the tensioning attachment part of a shear wall to the lower connecting member in another embodiment, where Figure (A) is an explanatory diagram showing the attachment part separated from the lower connecting member, and Figure (B) is an explanatory diagram showing the connected state. [Figure 5] 5 is a partially enlarged view showing a lower connecting member to which the tensioning mounting portion of the flat bar in FIG. 4 is connected. [Figure 6]An explanatory diagram showing the state in which the tensioning mounting portion of a load-bearing wall in another embodiment is connected to the lower connecting member. [Figure 7] 7 is a partially enlarged view showing a state in which the locking portion of the mounting portion for tensioning the flat bar in FIG. 6 is locked to the lower connecting member. [Figure 8] FIG. 10 is an explanatory diagram showing the tensioning attachment portion of a load-bearing wall using a round steel brace of another embodiment as a diagonal member, separated from the lower connecting member. DETAILED DESCRIPTION OF THE INVENTION

[0016] (Embodiment 1) Hereinafter, an embodiment according to one aspect of the present invention will be described with reference to the accompanying drawings. As shown in Figure 1, the bearing wall 1 of this embodiment is equipped with a cross of flat bars 2, which are diagonal members. Plate-shaped mounting portions 21 located on the upper end of each flat bar 2 are connected to upper connecting members 3 located on the upper side of columns 100, which form the skeleton of the building. Similarly, tensioning mounting portions 22 located on the lower end of each flat bar 2 are connected to lower connecting members 4 located on the lower side of the columns 100. In addition, the bearing wall 1 is equipped with battens, plywood, gypsum board, etc. on the outer surface of this internal structure.

[0017] A through hole is formed in the mounting portion 21 of the flat bar 2 in a direction perpendicular to the wall surface of the bearing wall 1, and a through hole is also formed in the upper connecting member 3 in a direction perpendicular to the wall surface of the bearing wall 1. A bolt of the bolt-nut 31 is inserted into the through hole and a nut is tightened onto the bolt, thereby fixing the mounting portion 21 to the upper connecting member 3. In other words, the upper side of the flat bar 2 is fixed to the upper connecting member 3 by the shear strength of the bolt. The nut of the bolt-nut 31 may be fixed to the upper connecting member 3 by welding or the like.

[0018] 2, the tensioning attachment portion 22 of the flat bar 2 comprises a flange 22a fixed at one end to the narrow side of the flat bar 2 by welding or the like, and an end plate portion 22b fixed at the other end of the flange 22a by welding or the like. The end plate portion 22b is located away from the small end (end face) of the flat bar 2, and a male screw portion 5 (described later) can be provided at this space. An insertion hole 22c is formed in the end plate portion 22b in the direction of the center line of the flat bar 2.

[0019] As shown in Figures 3(A) and 3(B), the mounting plate portion 41 of the lower connecting member 4 is fixed by welding or the like to the opposing surfaces of adjacent columns 100, 100. Two support plates 42, spaced apart in the wall thickness direction of the bearing wall 1, are fixed to the mounting plate portion 41 by welding or the like. A connecting plate portion 43, which faces the end plate portion 22b, is fixed to the upper ends of the two support plates 42 by welding or the like. A female screw portion 43a is threaded in the center line direction of the flat bar 2 in the connecting plate portion 43. The end plate portion 22b of the mounting portion 22 and the connecting plate portion 43 of the lower connecting member 4 are designed to be spaced apart by, for example, about 10 mm in the center line direction of the flat bar 2.

[0020] A male screw portion 5 is inserted into the insertion hole 22c from the space between the end plate portion 22b and the end of the flat bar 2. In this embodiment, a headed bolt is used as the male screw portion 5. That is, the headed bolt, which is the male screw portion 5 provided on the tensioning mounting portion 22, is inserted into the insertion hole 22c and screwed into the female screw portion 43a of the lower connecting member 4. Furthermore, a locking nut 6 is screwed onto the threaded portion of the male screw portion 5 protruding from the insertion hole 22c, with, for example, a spring washer interposed therebetween.

[0021] When the male screw portion (headed bolt) 5 is screwed into the female screw portion 43a, the head of the male screw portion 5 moves downward, and the end plate portion 22b is drawn toward the connecting plate portion 43. That is, the mounting portion 22 of the flat bar 2 is connected to the lower connecting member 4 by the screwing of the female screw portion 43a and the male screw portion 5, and is drawn toward the lower connecting member 4 by the positional displacement of the head due to the screwing of the male screw portion 5.

[0022] 3(B), even when a predetermined tension is applied to the flat bar 2, the end plate portion 22b of the mounting portion 22 is maintained separated from the connecting plate portion 43. With the predetermined tension applied, the nut 6 is tightened onto the end plate portion 22b side, and the male screw portion 5 is secured against loosening.

[0023] With the above configuration, the head of the male screw portion 5, which is threaded into the female screw portion 43a, moves, pulling the mounting portion 22 on one side toward the lower connecting member 4, so even in a structure that uses a flat bar 2 as the diagonal member, the flat bar 2 can be tensioned. Furthermore, with a structure that uses this flat bar 2, the thickness of the intersection of the two flat bars 2 can be made thinner than the thickness of the intersection of the two round steel braces, and the eccentricity of the connecting members 3, 4 with respect to the center of the column 100 can be reduced or eliminated, making it possible to make the load-bearing wall 1 thinner than in a structure that uses round steel braces.

[0024] Furthermore, since the mounting portion 21 is fixed to the upper connecting member 3 by the bolt and nut 31, the other side mounting portion 21 is simply connected using the shear strength of the bolt, improving the workability of on-site construction of the shear wall 1.

[0025] In FIG. 3(A), the mounting portion 22 is shown spaced far away from the lower connecting member 4 for ease of illustrating the relative positions of the components. In constructing the bearing wall 1, for example, the mounting portion 21 on the other side of the flat bar 2 is first connected to the upper connecting member 3 with a bolt and nut 31. In this connected state, the mounting portion 22 on one side is positioned spaced apart from the connecting plate 43, and in this spaced-apart state, the male threaded portion (headed bolt) 5 on the mounting portion 22 side can be threaded into the female threaded portion 43a. Furthermore, the space between the mounting portion 22 and the connecting plate 43 not only contributes to tensioning the flat bar 2, but also has the advantage of absorbing errors in the positional relationship between the mounting portion 22 and the connecting plate 43 due to manufacturing or construction errors in the bearing wall 1.

[0026] (Embodiment 2) Next, a second embodiment will be described. In this second embodiment, components common to the first embodiment will be denoted by the same reference numerals, and their description will be omitted. In the bearing wall 1 of this second embodiment, the structure of the flat bar 2 itself is the same as that of the first embodiment.

[0027] As shown in Figures 4(A) and 4(B), the bearing wall 1 of this second embodiment includes a lower connecting member 4A. The lower connecting member 4A includes a high nut 44 on the center line of the flat bar 2. As shown in Figure 5, the screw hole center of this high nut 44 is positioned at the center of the plate thickness of one support plate 42, and it is fixed to the support plate 42 by welding or the like. A stud bolt is threaded into the high nut 44 as a male thread 5A. The upper part of the male thread 5A is inserted from below into the insertion hole 22c of the flat bar 2 and protrudes above the end plate 22b. A female thread 7, which is a nut with a disc spring inserted in the space between the end plate 22b and the small end of the flat bar 2, is threaded into the male thread 5A.

[0028] As described above, the mounting portion 22 of the flat bar 2 is connected to the lower connecting member 4A by threading the female screw portion 7 into the male screw portion 5A. Then, the mounting portion 22 of the flat bar 2 is pulled toward the lower connecting member 4A by the positional displacement of the female screw portion 7 caused by screwing the female screw portion 7. The predetermined tension state of the flat bar 2 is maintained by tightening the nut 6 toward the end plate portion 22b.

[0029] With the above configuration, the female screw portion 7, which is screwed into the male screw portion 5A, moves, pulling the mounting portion 22 on one side toward the lower connecting member 4, so that even in a structure that uses a flat bar 2 as the diagonal member, the flat bar 2 can be tensioned.

[0030] Furthermore, in on-site construction of the bearing wall 1 of embodiment 2, the flat bar 2 can be temporarily secured by the lower connecting member 4A by moving the flat bar 2 downward from the state shown in Fig. 4(A) and inserting the male screw portion 5A into the insertion hole 22c of the mounting portion 22. In this temporarily secured state, the mounting portion 21 of the flat bar 2 can be connected to the upper connecting member 3 with bolts and nuts 31, improving the ease of construction in on-site construction of the bearing wall 1. It is also possible to first connect the mounting portion 21 to the upper connecting member 3, flex the flat bar 2, and then insert the male screw portion 5A into the insertion hole 22c of the mounting portion 22.

[0031] Furthermore, the female screw portion 7 inserted into the gap between the end plate portion 22b and the end of the flat bar 2 is a nut, which is thinner than the headed bolt, so the gap distance at the gap can be narrow.

[0032] Furthermore, the stud bolt serving as the male thread portion 5A can be a high-strength bolt, and the female thread portion 7 can be a high-strength nut. If a combination of high-strength bolts and nuts is possible in this way, it is possible to prevent screw stripping and the like.

[0033] In the above example, a high nut 44 is attached to the lower connecting member 4A, and a stud bolt is screwed into this high nut 44 as a male thread portion 5A, but it is also possible to weld a threaded round steel bar or the like to the lower connecting member 4A as the male thread portion 5A without providing the high nut 44.

[0034] 6, the mounting portion 22 may have a locking portion 221 that is locked to the lower connecting member 4 at a position away from the center line of the flat bar 2. The locking portion 221 may, for example, be a protrusion formed by projecting the lower side of the flange 22a closer to the column 100 downward beyond the end plate portion 22b, and a slit 22d located at the tip of the protrusion and locked to the support plate 42 of the lower connecting member 4A, as shown in FIG. 7. The width of the slit 22d is slightly wider than the thickness of the support plate 42 of the lower connecting member 4A, allowing the slit 22d to fit into the support plate 42. In other words, rotation of the mounting portion 22 on one side about the center line of the flat bar 2 is prevented by the locking portion 221 provided on the mounting portion 22 being locked to the upper connecting member 4. This makes it possible to prevent twisting of the flat bar 2 when the flat bar 2 is tensioned by the engagement of the male screw portion 5A and the female screw portion 7.

[0035] Furthermore, if the locking portion 221 is located closer to the column 100 than the male screw portion 5A and the female screw portion 7, the male screw portion 5A, the female screw portion 7, and the nut 6 can be positioned and operated from the side where the column 100 is not located, thereby improving the ease of construction of the shear wall 1 on site.

[0036] The length (height) from the opening of the slit 22d to the rear end face is set to a length (height) that will form a predetermined gap between the upper end face of the support plate 42 and the flat bar 2 when the flat bar 2 is under a predetermined tension. If this predetermined gap is specified in the design and the gap range is controlled during on-site construction, it will be easy to obtain an appropriate tension state for the flat bar 2.

[0037] The mounting portion 22 of the bearing wall 1 of the first embodiment may also be provided with a locking portion 221 that is locked to the lower connecting member 4. In this configuration, for example, a plate-like portion into which the slit 22d of the locking portion 221 fits is formed on the end surface of the connecting plate portion 43 of the lower connecting member 4 on the column side or on the center of the upper end of the mounting plate portion 41.

[0038] As shown in FIG. 8, instead of the flat bars 2, braces 2A can be used as diagonal members, with the flat bar bodies made of round steel bars 23. The brace 2A has a connecting plate 22f with a threaded hole at the end of the flange 22a facing the brace 2A, and the threaded hole is threaded into the threaded hole to accommodate the threaded portion 23a at the end of the brace 2A. The brace 2A is then secured to the connecting plate 22f by, for example, threading a nut 6A, with a spring washer or the like, onto the end of the brace 2A that extends beyond the connecting plate 22f. A connecting plate is secured to the other end of the brace 2A by welding, for example, in the same manner as the upper end of the flat bar 2. Furthermore, the brace 2A can also have the locking portion 221.

[0039] It is also possible to use a diagonal member with a structure in which round steel braces are provided on both ends of the flat bar portion so that the flat bar portion is located on the center side (the intersection side). Alternatively, a square steel pipe may be used as the diagonal member, with an attachment portion 22 provided on one end of the square steel pipe and connected to the lower connecting member 4. Alternatively, a plate with an insertion hole may be fixed to the end of the square steel pipe by welding or the like to serve as the attachment portion, and a notch may be formed by cutting out a portion of the side surface on the end side of the square steel pipe, and the male screw portion 5 or female screw portion 7 may be passed through the notch into the insertion hole.

[0040] Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as the present invention or within an equivalent scope. [Explanation of symbols]

[0041] 1: Load-bearing wall 2: Flat bar 2A: Brace 3: Upper connecting member 4: Lower connecting member 4A: Lower connecting member 5: Male thread part 5A: Male thread part 6: Nut 6A: Nut 7: Female thread part 21: Mounting part 22: Mounting part 22a: Flange 22b: End plate part 22c: Insertion hole 22d: Slit 22f: Connection plate part 23: Round steel 23a: Screw part 31: Nut 41: Mounting plate 42: Support plate 43: Connecting plate part 43a: Female thread part 44: High nut 100: Pillar 221: Locking part

Claims

1. A shear wall in which the attachment parts provided at both ends of the flat bar, which is a diagonal member, are connected to connecting members fixed to the building frame, The mounting portion on one side of the flat bar has an insertion hole in the direction of the center line of the flat bar, the mounting portion on one side and the connecting member are spaced apart in the center line direction, a male screw portion provided on either the mounting portion on one side or the connecting member and passed through the insertion hole is screwed into a female screw portion on the other side, the mounting portion on one side is pulled toward the connecting member by movement of either the male screw portion or the female screw portion due to the screw engagement; The mounting portion on one side has a plate portion located away from the end face of the flat bar, on the other end side of a plate member one end of which is fixed to the narrow side of the flat bar, and this plate portion has the insertion hole.

2. 2. A shear wall according to claim 1, wherein the mounting portion on the other side opposite the one side is fixed to the connecting member by a bolt screwed into the wall surface of the shear wall in a direction perpendicular to the wall surface.

3. A shear wall in which the attachment parts provided at both ends of the diagonal members are connected to connecting members fixed to the building frame, The mounting portion on one side of the diagonal member has an insertion hole in the center line direction of the diagonal member, the mounting portion on one side and the connecting member are spaced apart in the center line direction, a male screw portion provided on either the mounting portion on one side or the connecting member and passed through the insertion hole is screwed into a female screw portion on the other side, the mounting portion on one side is pulled toward the connecting member by movement of either the male screw portion or the female screw portion due to the screw engagement; A shear wall characterized in that the connecting member to which the mounting portion on one side is connected has the female screw portion, and the headed bolt, which is the male screw portion provided on the mounting portion on one side, is inserted into the insertion hole and screwed into the female screw portion.

4. 3. A shear wall according to claim 1, wherein the connecting member to which the mounting portion on one side is connected is provided with the male screw portion, and the nut, which is the female screw portion provided on the mounting portion on one side, is threaded onto the male screw portion inserted into the insertion hole.

5. A shear wall as described in any one of claims 1 to 4, characterized in that rotation of the diagonal member at the mounting portion on one side around the center line of the diagonal member is prevented by a locking portion provided on the mounting portion being locked to the connecting member.

6. 6. The bearing wall according to claim 5, wherein the engaging portion is located closer to the column as the main body than the male screw portion and the female screw portion.

Images