JP7061774B2 - High-strength bearing wall - Google Patents

Description

The present invention relates to a high-strength load-bearing wall.

The bearing wall used in the frame wall construction method (two-by-four construction method) is formed by attaching a plate material to a frame in which vertical and horizontal members are combined in a frame shape. As the bearing wall used in the one- and two-story houses, a bearing wall having a wall magnification of 3 to 5 is adopted, and generally, a bearing wall having a wall magnification of 4 is adopted. In a three-story house, a larger wall magnification is required, but conventionally, a bearing wall having a wall magnification equivalent to 10 (hereinafter, may be referred to as "10 times wall") may be used. In a bearing wall having such a large wall magnification, the joint between the vertical member and the horizontal member needs to be stronger than that of a normal bearing wall. Therefore, the vertical member and the horizontal member of the 10-fold wall are joined by using a nail as shown in Patent Document 1. In the nail of Patent Document 1, a screw portion is formed at the tip end portion, and a ring portion which is not a screw shape is formed at the base end portion. The ring portion comprises a plurality of ring states with a tapered inclined surface along the circumferential direction of the shaft portion of the nail. The tapered inclined surface is widened so that the base end side of the nail has a large diameter, and has an effect of preventing the nail from coming off. The ring portion is fitted into the horizontal member, and the screw portion is fitted into the vertical member.

Japanese Unexamined Patent Publication No. 2000-283131

By the way, there are cases where a building with four or more floors is constructed by the frame wall construction method, but if the existing 10 times wall is used here, the amount of bearing wall used will increase and the openings such as windows will become smaller. There was a problem that the restrictions on the design of the building became large. Therefore, a bearing wall with a larger wall magnification is required, but since there is no generally usable high-strength bearing wall, two 10-fold walls may be stacked in the thickness direction. However, in that case, there is a problem that the wall thickness becomes large and the construction is difficult.

Therefore, in recent years, the development of a high-strength load-bearing wall having a wall magnification equivalent to 30 (hereinafter, may be referred to as “30 times wall”) has been promoted. With such a 30-fold wall, the restrictions on the design are reduced and the construction is facilitated. However, since the strength of the 30-fold wall is very high, when the upper cross member and the lower cross member try to shift due to an earthquake, the frame does not deform into a parallelogram and tries to rotate. .. Therefore, there is a problem that the end portion of the vertical member is sunk into the surface of the horizontal member. Further, in the 30-fold wall, a large pulling force acts on the fixing member for fixing the vertical member and the horizontal member, and there is a possibility that the fixing member is pulled out from the vertical member or the horizontal member.

Therefore, it is an object of the present invention to provide a high-strength load-bearing wall capable of suppressing the sinking of a vertical member into a horizontal member and the pulling out of a fixing member.

The present invention for solving the above-mentioned problems is a high-strength bearing wall including a frame formed by combining a horizontal member and a vertical member in a frame shape and a plate material laid on the frame. The cross member is connected to the wood screw of a full-screw type in which screw threads are formed over the entire length of the body, and the length of the wood screw is twice the height dimension of the cross member, 89 mm. As described above, the upper end surface of the vertical member is in contact with the lower surface of the horizontal member on the upper side, the lower end surface of the vertical member is in contact with the upper surface of the horizontal member on the lower side, and the wood screw on the upper side is on the upper side. The lumber screw at the lower part is screwed downward from the upper surface of the cross member, and the wood screw at the lower part is screwed upward from the lower surface of the cross member. The plate material is composed of a particle board. , It is laid on both sides of the frame and fixed to the frame via nails, the head of the nail has a flat head flat shape, and the diameter of the head is 7.9 mm or more and 8.7 mm or more. Small, the shaft of the nail comprises a screw thread, a column and a stepped taper from the tip to the base, one of which is offset inward from the outer perimeter of the frame. The double outer and inner fringes were secured to the frame by the nails staggered on the inner rim, and the other plate was placed on a single rim that was offset inward from the outer rim of the frame. A high-strength bearing wall characterized by being fixed to the frame with the nails .

According to the high-strength load-bearing wall having such a structure, the screw screw is screwed into both the vertical member and the horizontal member, so that even if the high-strength load-bearing wall tries to rotate, the vertical member tries to press the horizontal member. The stress to be applied is transmitted from the vertical member to the cross member via the screw screw on the tip side, the main body of the wood screw, and the screw screw on the base end side. That is, the stress from the vertical material is not only transmitted from the end face (wood mouth) of the vertical material to the surface of the horizontal material, but also dispersed at the insertion portion of the wood screw and transmitted to the horizontal material. Can be received and does not concentrate locally on the surface of the cross member. Therefore, it is possible to prevent the end portion of the vertical member from digging into the surface of the horizontal member. Further, since the wood screw of the all-screw type is used, the wood screw is screwed with the vertical member and the horizontal member over the entire length of the body. Therefore, it is possible to suppress the pulling out of the wood screw which is a fixing member. Further, since the length of the wood screw is more than twice the height dimension of the cross member, a large amount of stress from the vertical member can be transmitted by the wood screw. In addition, the plate material is fixed to the frame via nails, the head of the nail has a flat head flat shape, and the shaft part of the nail has a screw screw part, a columnar part, and a step from the tip side to the base end side. Since it is provided with a tapered portion, it is possible to firmly bond the plate material and the frame and prevent the plate material from coming off the frame. Further, since the diameter of the head of the nail is 7.9 mm or more and smaller than 8.7 mm, the plate material can be pressed in a large area. Therefore, it is possible to prevent the plate material from coming off the nail. Further, since the plate material is made of particle board, the strength of the high-strength bearing wall can be increased, and the strength can be adjusted by changing the thickness of the plate material.

According to the present invention, it is possible to obtain excellent effects such as the ability to prevent the vertical member from being sunk into the horizontal member and the fixing member from being pulled out.

It is a side view which showed the high strength bearing wall which concerns on embodiment of this invention. It is a horizontal sectional view which showed the high strength bearing wall which concerns on embodiment of this invention. It is a side sectional view which showed the high strength bearing wall which concerns on embodiment of this invention. It is a side view which showed the wood screw of the all-screw type which connects a vertical member and a horizontal member. It is a side view which showed the nail which connects a plate material to a frame. It is a side view which showed the state which the thick plate material was connected to the frame. It is a side view which showed the state which the thin plate material was connected to the frame.

The high-strength load-bearing wall according to the embodiment of the present invention will be described in detail with reference to the drawings. The high-strength bearing wall of the present embodiment has high strength and is mainly applied to a wooden building having four or more layers. As shown in FIG. 1, the high-strength load-bearing wall 1 is installed between the base 3 installed on the foundation 2 and the upper beam 4. In this embodiment, two high-strength bearing walls 1 are connected to the left and right. In the high-strength bearing wall 1, the left-right width of the plate material 20 described later is the width of one bearing wall. The connection configuration of the high-strength load-bearing wall 1 is not limited to the one in which two pieces are connected to the left and right, and may be a single piece or may be one in which three or more pieces are connected.

As shown in FIGS. 1 to 3, the high-strength load-bearing wall 1 includes a frame 10 and a plate material 20. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 3 is a cross-sectional view taken along the line BB of FIG.

In the frame 10 of the present embodiment, two high-strength bearing walls 1 and 1 minutes are formed together. The frame 10 is formed by combining a horizontal member 11 and a vertical member 12 in a frame shape. The frame 10 is placed on the base 3, and the upper end surface is in contact with the lower surface of the through member 5 provided in the lower part of the beam 4. The cross member 11 is composed of an upper beam member 13 and a lower beam member 14. The upper beam member 13 is made of laminated lumber for Douglas fir structure having a thickness of 89 mm and a width of 140 mm, and is fixed to the lower surface of the through member 5. The lower beam member 14 is made of laminated lumber for Douglas fir structure having a thickness of 89 mm and a width of 140 mm, and is fixed to the upper surface of the base 3.

The vertical member 12 is composed of a column member 15 and a stud member 16. The pillar material 15 is made of, for example, a 140 mm square Douglas-fir structural laminated lumber. The pillar material 15 is provided at two places on the left and right ends of the plate material 20. In the portion provided at the connecting portion of the two plate materials 20 and 20, one pillar material 15 is shared for fixing the plate materials 20 and 20 on both the left and right sides. The stud member 16 is made of a framed wall construction method structural lumber having a thickness of 38 mm and a width of 140 mm. The stud member 16 is provided between the adjacent column members 15, 15.

The upper end surface of the pillar member 15 is in contact with the lower surface of the upper beam member 13. On the other hand, the lower end surface of the pillar member 15 is in contact with the upper surface of the lower beam member 14. The pillar member 15 is fixed to the upper beam member 13 and the lower beam member 14 via the wood screw 30. The upper wood screw 30 is screwed downward from the upper surface of the upper beam member 13 and penetrates, and the tip end portion is screwed into the upper end portion of the pillar member 15. The lower wood screw 30 is screwed upward from the lower surface of the lower beam member 14 and penetrates, and the tip end portion is screwed into the lower end portion of the pillar member 15.

As shown in FIG. 4, the wood screw 30 is a full-screw type in which a screw screw 32 is formed over the entire length of the body portion 31. The wood screw 30 includes a body portion 31 and a head portion 33. A tool hole 34 into which a tool is fitted is formed in the head 33. The length of the wood screw 30 is, for example, approximately 180 mm, which is more than twice the height dimension (thickness 89 mm) of the cross member 11. As a result, the screw length screwed into the vertical member 12 is longer than the screw length screwed into the horizontal member 11. The length of the wood screw 30 may be longer than 180 mm. The nominal diameter of the wood screw 30 (outer diameter of the tip of the screw thread of the screw screw 32) is approximately 8 mm, and the valley diameter (outer diameter of the valley of the screw thread) is approximately 5 mm.

The stud member 16 is fixed to the upper beam member 13 and the lower beam member 14 via ordinary nails (not shown).

The plate material 20 is composed of a particle board formed by heating and compressing wood chips. The plate material 20 is provided on both the outer wall side and the indoor side of the frame 10. The thickness of the plate material 21 on the outer wall side is, for example, 20 mm, and the thickness of the plate material 22 on the indoor side is, for example, 12 mm. The plate material 20 is fixed to the frame 10 via a nail 40. The thickness of the plate material is an example, and is appropriately set according to the required strength.

As shown in FIG. 5, the nail 40 includes a head portion 41 and a shaft portion 43. The head 41 has a flat head shape. The diameter of the head 41 is, for example, 7.9 mm. The diameter of the head 41 may be 7.9 mm or more, preferably up to 8.7 mm. The shaft portion 43 includes a screw screw portion 44, a cylindrical portion 45, and a stepped tapered portion 46. The screw screw portion 44 is provided at the tip end portion of the shaft portion 43. The tip of the screw screw portion 44 is sharp. Due to the presence of the screw screw portion 44, when the nail 40 is driven in, the nail 40 is immersed in the frame 10 while rotating. The cylindrical portion 45 has a cylindrical shape with a flat surface, and is provided adjacent to the base end side of the screw screw portion 44. The diameter of the columnar portion 45 (typical diameter of the shaft portion 43) is 3.72 mm, which is thicker than the nail for attaching the plate material used for a general bearing wall. The diameter of the head 41 is at least twice the diameter of the cylindrical portion 45. The stepped tapered portion 46 is configured by forming a plurality of skirt-shaped tapered portions whose diameters increase toward the base end side, and suppresses the extraction of the nail 40 while allowing the insertion of the nail 40. It has a structure. The stepped tapered portion 46 is provided adjacent to the base end side of the cylindrical portion 45.

In order to fix the plate material 21 on the outer wall side to the frame 10, as shown in FIG. 6, the outer peripheral edge of the frame 10 (the upper edge of the upper beam material 13, the outer edges of the pillar materials 15 at the left and right ends, and the lower beam material 14). The nail 40 is driven on the outer peripheral edge line 47a and the inner peripheral edge line 47b (both are shown by a two-dot chain line in FIG. 6) along the outer peripheral line (the outer peripheral line connecting the lower edge). The outer peripheral edge line 47a is arranged at a position offset inward by 15 mm from the outer peripheral edge of the frame 10. Further, the inner peripheral edge line 47b is arranged at a position offset inward by 15 mm from the outer peripheral edge line 47a. The nails 40 are arranged on the outer peripheral edge line 47a at a pitch of 80 mm. Further, the nails 40 are arranged at a pitch of 80 mm even on the inner peripheral edge line 47b. The nails 40, 40 ... On the outer peripheral edge line 47a and the nails 40, 40 ... On the inner peripheral edge line 47b are arranged so as to have a staggered relationship. Further, the nail 40 is also arranged on the center line 48 passing through the center of the stud member 16. The nails 40 are arranged on the center line 48 at a pitch of 200 mm.

In order to fix the plate material 22 on the indoor side to the frame 10, as shown in FIG. 7, a nail 40 is placed on the peripheral edge line 47 (indicated by the alternate long and short dash line in FIG. 7) along the outer peripheral edge of the frame 10. I'm typing. In the plate material 22 on the indoor side, the nail 40 is shot on the peripheral line 47, which is not double but single. The peripheral edge line 47 is arranged at a position offset inward by 15 mm from the outer peripheral edge of the frame 10. The nails 40 are arranged on the peripheral line 47 at a pitch of 50 mm. Further, the nail 40 is also arranged on the center line 48 passing through the center of the stud member 16. The nails 40 are arranged on the center line 48 at a pitch of 200 mm.

The arrangement position and arrangement pitch of the nails 40 for fixing the plate materials 21 and 22 described above are examples, and are appropriately set according to the plate thickness of the plate materials 21 and 22 and the required strength of the high-strength bearing wall 1. Will be done.

According to the high-strength bearing wall 1 of the present embodiment, since the screw screw 32 of the all-screw type wood screw 30 is screwed into both the cross member 11 and the vertical member 12, the wood screw 30 is referred to as the cross member 11. It is in close contact with both of the vertical members 12 without any gaps. Therefore, even if the high-strength bearing wall 1 tries to rotate due to the stress of an earthquake or the like, the stress that the vertical member 12 tries to press the cross member 11 is from the vertical member 12 to the tip of the screw screw 32 and the body 31 of the wood screw 30. It is transmitted to the cross member 11 via the main body portion of the screw screw 32 and the base end side of the screw screw 32. That is, the stress from the vertical member 12 is not only transmitted from the end surface (wood end) of the vertical member 12 to the surface of the horizontal member 11, but also dispersed at the insertion portion of the wood screw 30 and transmitted to the horizontal member 11. It can be received over the entire height (plate thickness) of 11, and is not locally concentrated on the surface of the cross member 11. Therefore, since the surface of the cross member 11 is not pressed intensively, it is possible to prevent the end portion of the vertical member 12 from being sunk into the surface of the cross member 11. Further, since the all-screw type wood screw 30 is used, the wood screw 30 is screwed with the vertical member 12 and the horizontal member 11 over the entire length of the body portion 31. Therefore, it is possible to suppress the pulling out of the wood screw 30 which is a fixing member.
Can be prevented.

In particular, in the present embodiment, the length of the wood screw 30 is more than twice the height dimension of the cross member 11, so that the stress from the vertical member 12 is received by the wood screw 30 and most of it is transmitted to the cross member 11. Can be made to.

Further, in the high-strength bearing wall of the present invention, since the head 41 of the plate material 20 is fixed to the frame 10 by a flat-headed flat-shaped nail 40 having a large area of 7.9 mm in diameter, the plate material 20 is fixed to the frame 10 by the nail 40. 20 is held down in a large area. Therefore, it is possible to prevent the plate member 20 from coming out of the head 41 of the nail 40 and separating from the nail 40. Therefore, the plate material 20 and the frame 10 can be firmly bonded to prevent the plate material 20 from coming off the frame 10. Further, since the screw screw portion 44 of the shaft portion 43 of the nail 40 is in close contact with the frame 10 and the stepped tapered portion 46 suppresses the nail 40 from being pulled out from the frame 10, the plate material 20 and the frame 10 are fixed. The strength is greatly increased. Further, since the diameter of the shaft portion 43 of the nail 40 is large, it is possible to counter a large shearing force.
Since the number of nails 40 to be constructed is large, it is preferable that the size of the head is limited to the size that can be constructed by a nail gun.

Since the plate material 21 on the outer wall side is fixed to the frame 10 with the double outer peripheral edge line 47a and the nails 40, 40 ... On the inner peripheral edge line 47b, it can be firmly fixed. Further, since the nails 40 are staggered, stress can be distributed in a well-balanced manner between the outer peripheral edge line 47a and the inner peripheral edge line 47b.

On the other hand, since the plate material 20 is made of particle board, the strength of the high-strength bearing wall 1 can be increased, and the strength can be adjusted by changing the plate thickness of the plate material 20. Further, by laying the plate material 20 on both sides of the frame 10, the strength of the high-strength load-bearing wall 1 can be further increased.

Although the embodiment for carrying out the present invention has been described above, the present invention is not limited to the above-described embodiment, and the design can be appropriately changed without departing from the spirit of the present invention. For example, in the above embodiment, the lumber 30 is used only for connecting the pillar 15 and the cross member 11, but may be used for connecting the stud 16 and the cross member 11. Further, the length of the wood screw 30 may be lengthened, and the screwing length between the screw screw 32 of the wood screw 30 and the vertical member 12 may be lengthened. By doing so, the strength of the high-strength load-bearing wall 1 can be further increased.

Further, in the above embodiment, the plate material 20 is provided on both sides of the frame 10, but the plate material 20 is not limited to this. When the required strength is small, the plate material 20 may be provided on one side of the frame 10. With this configuration, the strength of the high-strength load-bearing wall 1 can be adjusted as appropriate.

1 High-strength bearing wall 10 Frame 11 Horizontal material 12 Vertical material 20 Plate material 21 (Outer wall side) Plate material 22 (Indoor side) Plate material 30 Wood screw 31 Body 32 Screw screw 33 Head 40 Nail 41 Head 43 Shaft 44 Screw Threaded part 45 Cylindrical part 46 Stepped tapered part

Claims (1)

A high-strength load-bearing wall including a frame formed by combining horizontal members and vertical members in a frame shape, and a plate material laid on the frame.
The vertical member and the horizontal member are connected by a full-screw type wood screw in which a screw screw is formed over the entire length of the body.
The length of the wood screw is more than twice the height dimension of the cross member, 89 mm.
The upper end surface of the vertical member is in contact with the lower surface of the horizontal member on the upper side, and the lower end surface of the vertical member is in contact with the upper surface of the horizontal member on the lower side.
The upper wood screw is screwed downward from the upper surface of the upper cross member, and the lower wood screw is screwed upward from the lower surface of the lower cross member.
The plate material is composed of a particle board, is laid on both sides of the frame, and is fixed to the frame via nails.
The head of the nail has a flat head shape, and the diameter of the head is 7.9 mm or more and smaller than 8.7 mm.
The shaft portion of the nail includes a screw screw portion, a cylindrical portion, and a stepped tapered portion from the tip end side to the base end side.
One plate material is fixed to the frame by a double outer peripheral edge line offset inward from the outer peripheral edge of the frame and the nails arranged in a staggered pattern on the inner peripheral edge line.
The other plate material is a high-strength load-bearing wall characterized in that it is fixed to the frame by the nails arranged on a single peripheral edge line offset inward from the outer peripheral edge of the frame.

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