JP2023119924A - bearing wall - Google Patents

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

The present invention relates to a bearing wall reinforced against horizontal loads by diagonal members.

Structures using turnbuckle braces and structures using flat bars are known as load-bearing walls. Further, Patent Document 1 discloses a load-bearing wall using square steel pipes as diagonal members.

JP 2017-179989 A

However, load-bearing walls using turnbuckle braces are relatively expensive due to the need for turnbuckles to tension the braces. On the other hand, in the load-bearing wall using the flat bar, since the turnbuckle cannot be used, the flat bar cannot be tensioned. For this reason, initial tension cannot be applied to the flat bar, and the flat bar may be bent due to manufacturing accuracy and construction accuracy, and the initial rigidity of the load-bearing wall is low. A structure in which the diagonal members are rectangular steel pipes also has the same problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide a load-bearing wall that can be tensioned even if the diagonal member is a flat bar or the like.

The load-bearing wall of the present invention is a load-bearing wall in which mounting portions provided at both ends of diagonal members are connected to connection members fixed to a building skeleton,
The mounting portion on one side of the diagonal member has an insertion hole in the direction of the center line of the diagonal member,
The mounting portion on the one side and the connection member are spaced apart in the center line direction,
A male screw portion provided on one side of the mounting portion on the one side and the connection member and passed through the insertion hole and a female screw portion on the other side are screwed together,
The mounting portion on the one side is pulled toward the connecting member by movement of either one of the male screw portion and the female screw portion due to the screw engagement.

With the above configuration, the mounting portion on one side is pulled toward the connecting member by the movement of either one of the male screw portion and the female screw portion due to the screwing of the male screw portion and the female screw portion. This flat bar can be tensioned even in a structure using square steel pipes or the like.

The mounting portion on one side may have a plate portion positioned apart from the end face of the diagonal member, and the plate portion may have the insertion hole. According to this, the male threaded portion or the female threaded portion can be provided on the mounting portion on the one side at the separated portion.

The mounting portion on the other side located on the opposite side of the one side may be fixed to the connecting member by a bolt screwed in a direction perpendicular to the wall surface of the load-bearing wall. According to this, the mounting portion on the other side is a simple connection using the shear strength of the bolt, and the workability of on-site fabrication of the load-bearing wall is improved.

A connection member to which the mounting portion on the one side is connected has the female screw portion, and a headed bolt, which is the male screw portion provided on the mounting portion on the one side, is inserted through the insertion hole and the female threaded portion is inserted into the female screw portion. It may be screwed onto the threaded portion.

Alternatively, the connection member to which the mounting portion on the one side is connected is provided with the male screw portion, and the male screw portion having the nut, which is the female screw portion provided on the mounting portion on the one side, is inserted through the insertion hole. It may be screwed onto the threaded portion.

In the load-bearing wall, even if rotation about the center line of the diagonal member in the mounting portion on one side is prevented by locking a locking portion provided in the mounting portion to the connecting member. good. According to this, it is possible to prevent the diagonal member from being twisted when the diagonal member is tightened by screwing the male thread portion and the female thread portion.

The locking portion may be positioned closer to the pillar as the frame than the male thread portion and the female thread portion. According to this, since the male screw portion and the like can be arranged and operated from the side where the pillar is not located, workability in manufacturing the load-bearing wall is improved.

According to the present invention, even in a structure using a flat bar or the like as a diagonal member, the tension can be applied, the initial tension can be introduced in the diagonal member, and the deflection of the diagonal member due to manufacturing accuracy and construction accuracy can be suppressed. The effect is that the initial rigidity of the load-bearing wall can be increased by eliminating the problem.

FIG. 4 is an explanatory diagram showing the internal structure of a load-bearing wall using the flat bar of the embodiment as a diagonal member; Figure 2 is a schematic perspective view of a tensioning mount for the flat bar of Figure 1; Fig. 2 shows the connection of the mounting portion for tensioning of the load-bearing wall of Fig. 1 to the lower connecting member, and Fig. 1A is an explanatory view showing the mounting portion separated from the lower connecting member; FIG. (B) is an explanatory diagram showing a connection state. Fig. 10 shows the connection of the mounting portion for tensioning of the load-bearing wall of another embodiment to the lower connecting member; 3B is an explanatory diagram showing the connection state. FIG. 5 is a partially enlarged view showing a lower connecting member to which the mounting portion for tensioning of the flat bar of FIG. 4 is connected; FIG. 11 is an explanatory view showing a state in which a mounting portion for tensioning a load-bearing wall according to another embodiment is connected to a lower connecting member; FIG. 7 is a partial enlarged view showing a state in which the locking portion of the mounting portion for tensioning the flat bar of FIG. 6 is locked to the lower connecting member; FIG. 11 is an explanatory view showing a mounting portion for tensioning of a load-bearing wall using a round steel brace of another embodiment as a diagonal material, separated from a lower connecting member.

(Embodiment 1)
An embodiment according to one aspect of the present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1, the load-bearing wall 1 of this embodiment includes flat bars 2, which are diagonal members, in a cross shape. A plate-like mounting portion 21 positioned on the upper end side of each flat bar 2 is connected to an upper connecting member 3 positioned on the upper side of a pillar 100 that is the skeleton of the building. Similarly, the mounting portion 22 for tension located on the lower end side of each flat bar 2 is connected to the lower connecting member 4 located on the lower side of the column 100 . Moreover, the load-bearing wall 1 is provided with crosspieces, plywood, gypsum board, etc. on the outer surface side of such an internal structure.

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 the upper connection member 3 also has a through hole in a direction perpendicular to the wall surface of the bearing wall 1 . is formed. The mounting portion 21 is fixed to the upper connecting member 3 by inserting the bolt of the bolt/nut 31 into the through hole and tightening the nut on the bolt. That is, the upper side of the flat bar 2 is fixed to the upper connecting member 3 by the shear strength of the bolt. The nuts of the bolts and nuts 31 may be fixed to the upper connection member 3 by welding or the like.

On the other hand, as shown in FIG. 2, the tension mounting portion 22 of the flat bar 2 includes a flange 22a fixed at one end to the narrow side surface of the flat bar 2 by welding or the like, and these flanges 22a. An end plate portion 22b fixed by welding or the like is provided on the other end side of 22a. The end plate portion 22b is positioned apart from the edge (end surface) of the flat bar 2, and a male screw portion 5, which will be described later, can be provided at this spaced portion. An insertion hole 22c is formed in the end plate portion 22b in the direction of the center line of the flat bar 2. As shown in FIG.

As shown in FIGS. 3A and 3B, the mounting plate portion 41 of the lower connecting member 4 is fixed to the facing surfaces of the adjacent columns 100, 100 by welding or the like. Two support plates 42 positioned apart in the wall thickness direction of the load-bearing wall 1 are fixed to the mounting plate portion 41 by welding or the like. A connection plate portion 43 facing 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 43 a is cut in the connecting plate portion 43 in the center line direction of the flat bar 2 . The end plate portion 22b of the mounting portion 22 and the connecting plate portion 43 of the lower connecting member 4 are separated from each other in the direction of the center line of the flat bar 2 by, for example, about 10 mm in design.

The male screw portion 5 is inserted into the insertion hole 22c from the spaced portion between the end plate portion 22b and the edge of the flat bar 2. As shown in FIG. 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 in the mounting portion 22 for tensioning, is inserted through the insertion hole 22c and screwed into the female screw portion 43a of the lower connecting member 4. As shown in FIG. A locking nut 6 is screwed onto the threaded portion of the male threaded portion 5 protruding from the insertion hole 22c with, for example, a spring washer interposed therebetween.

When the male screw portion (headed bolt) 5 is screwed into the female screw portion 43a, the head portion of the male screw portion 5 moves downward, and the end plate portion 22b moves toward the connecting plate portion. It is drawn to the 43 side. That is, the mounting portion 22 of the flat bar 2 is connected to the lower connecting member 4 by screwing the female screw portion 43a and the male screw portion 5, and the position of the head by screwing the male screw portion 5 is adjusted. Due to the displacement, it is pulled toward the lower connecting member 4 side.

Even when the flat bar 2 is under tension, the end plate portion 22b of the mounting portion 22 and the connecting plate portion 43 are kept separated from each other, as shown in FIG. 3(B). The nut 6 is tightened toward the end plate portion 22b while the predetermined tension is generated, and the male screw portion 5 is fixed without loosening.

With the above configuration, the mounting portion 22 on the one side moves toward the lower connecting member 4 by moving the head portion of the male screw portion 5 by screwing the male screw portion 5 into the female screw portion 43a. Therefore, even in the structure using the flat bar 2 as the diagonal member, the flat bar 2 can be tensioned. With the structure using 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. eccentricity with respect to the center of the column 100 can be reduced or eliminated.

In addition, since the mounting portion 21 is fixed to the upper connecting member 3 by the bolt and nut 31, the mounting portion 21 on the other side is a simple connection using the shear strength of the bolt. The workability of on-site production is improved.

In addition, in FIG. 3A, for the sake of convenience, the mounting portion 22 is shown with a large distance from the lower connecting member 4 in order to facilitate the illustration of the positional relationship of the members. In the production of the load-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 bolts and nuts 31. As shown in FIG. In this connected state, the mounting portion 22 on one side is positioned apart from the connecting plate portion 43, and in this separated state, the male screw portion (headed bolt) 5 provided on the mounting portion 22 side is inserted into the female screw portion 43a. It can be screwed in by screwing it in. Further, if the mounting portion 22 and the connecting plate portion 43 are spaced apart, not only due to the tension of the flat bar 2, but also due to manufacturing and construction errors of the bearing wall 1, the mounting portion 22 and the connecting plate portion 43 may be separated from each other. There is also the advantage of being able to absorb errors in the positional relationship between

(Embodiment 2)
Next, Embodiment 2 will be described. In this second embodiment, the same reference numerals are given to the same constituent elements as in the first embodiment, and the description thereof will be omitted. In the load-bearing wall 1 of the second embodiment, the structure of the flat bar 2 itself is the same as that of the first embodiment.

The load-bearing wall 1 of Embodiment 2 includes a lower connecting member 4A, as shown in FIGS. 4(A) and 4(B). The lower connecting member 4A has a high nut 44 on the center line of the flat bar 2. As shown in FIG. As shown in FIG. 5, the high nut 44 has the center of the screw hole positioned at the center of the plate thickness of one support plate 42 and is fixed to the support plate 42 by welding or the like. A stud bolt is screwed to the high nut 44 as the male screw portion 5A, for example. The upper portion of the male screw portion 5A is inserted through the insertion hole 22c of the flat bar 2 from below and protrudes upward from the end plate portion 22b. A female threaded portion 7, which is a nut with a disc spring, inserted in a spaced apart portion between the end plate portion 22b and the edge of the flat bar 2, is screwed into the male threaded portion 5A.

The mounting portion 22 of the flat bar 2 is connected to the lower connecting member 4A by screwing the female screw portion 7 and the male screw portion 5A, as described above. The mounting portion 22 of the flat bar 2 is pulled toward the lower connecting member 4A due to the displacement of the female screw portion 7 caused by the screwing of the female screw portion 7 . The predetermined tension state of the flat bar 2 is maintained by tightening the nut 6 on the end plate portion 22b side.

With the above configuration, the mounting portion 22 on the one side is pulled toward the lower connecting member 4 by moving the female thread portion 7 by screwing the female thread portion 7 to be screwed into the male thread portion 5A. Therefore, even in the structure using the flat bar 2 as the diagonal member, the flat bar 2 can be tensioned.

In the field construction of the bearing wall 1 of Embodiment 2, the flat bar 2 is moved downward from the state shown in FIG. , the flat bar 2 can be temporarily received by the lower connecting member 4A. In this temporary receiving state, the attachment portion 21 of the flat bar 2 can be connected to the upper connecting member 3 with the bolts and nuts 31, so that workability in manufacturing the load-bearing wall 1 on site is improved. It is also possible to first connect the mounting portion 21 to the upper connecting member 3, bend the flat bar 2, and insert the male screw portion 5A into the insertion hole 22c of the mounting portion 22. FIG.

The female threaded portion 7 to be inserted into the space between the end plate portion 22b and the edge of the flat bar 2 is a nut, and is thinner than the headed bolt. It can be narrow.

Further, the stud bolt as the male screw portion 5A can be a high-strength bolt, and the female screw portion 7 can be a high-strength nut. If it is possible to combine high-strength bolts and nuts in this way, it is possible to prevent screw crushing and the like.

In the above example, the high nut 44 is attached to the lower connecting member 4A, and the stud bolt is screwed into the high nut 44 as the male screw portion 5A. A threaded round steel or the like may be welded to the lower connecting member 4A.

Further, as shown in FIG. 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 is, for example, a projecting portion in which the lower side of the flange 22a closer to the column 100 projects downward than the end plate portion 22b, and is positioned at the tip of this projecting portion, as shown in FIG. , and a slit 22d engaged with the support plate 42 of the lower connecting member 4A. The width of the slit 22d is slightly wider than the plate thickness of the support plate 42 of the lower connecting member 4A, so that the slit 22d can be fitted into the support plate 42. As shown in FIG. That is, the rotation of the mounting portion 22 on one side about the center line of the flat bar 2 is prevented by locking the locking portion 221 provided in the mounting portion 22 to the upper connecting member 4 . be. This prevents the flat bar 2 from being twisted when the flat bar 2 is tightened by screwing the male screw portion 5A and the female screw portion 7 together.

Further, when the engaging portion 221 is located closer to the column 100 than the male thread portion 5A and the female thread portion 7, the male thread portion 5A and the female thread portion 7 are arranged from the side where the column 100 is not located. , the nut 6 can be arranged and operated, so workability of the load-bearing wall 1 on site is improved.

The length (height) from the opening of the slit 22d to the inner end surface is such that a predetermined gap is formed between the flat bar 2 and the upper end surface of the support plate 42 when a predetermined tension is obtained. Length (height). A predetermined clearance is defined as the clearance in design, and if the clearance range is managed during construction on site, it becomes easy to obtain an appropriate tension state of the flat bar 2 .

The mounting portion 22 of the load-bearing wall 1 of Embodiment 1 can also be provided with the locking portion 221 that is locked to the lower connecting member 4 . In the case of this configuration, for example, a plate-like portion into which the slit 22d of the locking portion 221 is fitted is formed at the end face of the connecting plate portion 43 of the lower connecting member 4 on the column side or at the center of the upper end of the mounting plate portion 41. be done.

Further, as a diagonal member, instead of the flat bar 2, as shown in FIG. 8, a brace 2A having a structure in which the flat bar main body portion is a round steel 23 can be used. The brace 2A has, for example, a connection plate portion 22f with a screw hole at the brace 2A side end of the flange 22a, and the screw portion 23a at the end of the brace 2A is screwed into the screw hole. Then, for example, the brace 2A is fixed to the connection plate portion 22f by screwing the nut 6A with a spring washer or the like interposed at the end portion of the brace 2A that has escaped from the connection plate portion 22f. A connection plate is fixed to the other end of the brace 2A by welding, for example, similarly to the upper end of the flat bar 2. As shown in FIG. Further, such a brace 2A can also be provided with the locking portion 221 described above.

It is also possible to use a diagonal member having a structure in which round steel braces are provided at both ends of the flat bar portion so that the flat bar portion is positioned on the center side (crossing portion side). Alternatively, a square steel pipe may be used as the diagonal member, and a mounting portion 22 may be provided at one end of the square steel pipe, and the mounting portion 22 may be connected to the lower connecting member 4. In addition, a plate having an insertion hole at the end of the square steel pipe is fixed by welding or the like to use the plate as a mounting portion, and a part of the side surface on the end side of the square steel pipe is cut to form a notch portion. The male threaded portion 5 and the female threaded portion 7 may be passed through the insertion hole through the notch portion.

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 embodiment within the same scope as the present invention or within an equivalent scope.

Reference Signs List 1: bearing wall 2: flat bar 2A: brace 3: upper connecting member 4: lower connecting member 4A: lower connecting member 5: male screw portion 5A: male screw portion 6: nut 6A: nut 7: female screw portion 21 : Mounting portion 22 : Mounting portion 22a : Flange 22b : End plate portion 22c : Insertion hole 22d : Slit 22f : Connection plate portion 23 : Round steel 23a : Screw portion 31 : Nut 41 : Mounting plate portion 42 : Support plate 43 : Connection Plate portion 43a: Female screw portion 44: High nut 100: Column 221: Locking portion

Claims (7)

A load-bearing wall in which mounting portions provided at both ends of diagonal members are connected to connection members fixed to a building skeleton,
The mounting portion on one side of the diagonal member has an insertion hole in the direction of the center line of the diagonal member,
The mounting portion on the one side and the connection member are spaced apart in the center line direction,
A male screw portion provided on one side of the mounting portion on the one side and the connection member and passed through the insertion hole and a female screw portion on the other side are screwed together,
A force-bearing wall, wherein the mounting portion on the one side is pulled toward the connecting member by movement of either one of the male screw portion and the female screw portion due to the screwing. 2. The load-bearing wall according to claim 1, wherein the mounting portion on one side has a plate portion positioned apart from the end face of the diagonal member, and the plate portion has the insertion hole. bearing wall. 3. In the load-bearing wall according to claim 1, the mounting portion on the other side located on the opposite side of the one side is connected to the connection member by a bolt screwed in a direction perpendicular to the wall surface of the load-bearing wall. A load-bearing wall characterized in that it is fixed. In the load-bearing wall according to any one of claims 1 to 3, a connection member to which the mounting portion on the one side is connected is provided with the female screw portion, and is provided on the mounting portion on the one side. A load-bearing wall, wherein the headed bolt, which is the male screw portion, is inserted through the insertion hole and screwed into the female screw portion. In the load-bearing wall according to any one of claims 1 to 3, a connection member to which the mounting portion on the one side is connected is provided with the male screw portion, and is provided on the mounting portion on the one side. A force-bearing wall, wherein a nut, which is the female screw portion, is screwed onto the male screw portion inserted through the insertion hole. 6. The load-bearing wall according to claim 1, wherein the rotation of the mounting portion on one side about the center line of the diagonal member is controlled by a locking portion provided in the mounting portion. A load-bearing wall that is blocked by being locked to the connection member. 7. The load-bearing wall according to claim 6, wherein the locking portion is positioned closer to the column as the skeleton than the male screw portion and the female screw portion.

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