JP2007308919A - Method and structure for strengthening wall, having column exposed on external surface, of existing house - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a structure for seismically strengthening a place of a wall where a column is exposed on an external surface and which is crossed by a horizontal piece of timber, in an existing house constructed by a wooden framework method. <P>SOLUTION: In the place of the wall where the column is exposed on the external surface and which is crossed by the horizontal piece 8 of timber in the existing house, an internal wall material is removed while keeping the horizontal piece 8 of timber, a ceiling and a floor in an as-is state. A batten 7 is removed from a frame of the wall, which is composed of upper and lower exposed horizontal members 1 and 2, right and left columns 4 and 3, the batten 7, etc.; and a plurality of crossrails 5 are mounted between the right and left columns. While a wall surface material 6 for strength is mounted on the indoor side surfaces of the plurality of crossrails 5, the upper and lower crossrails 5a and 5b for connection, which are attached in the state of getting close to the upper and lower parts of the horizontal piece 8 of timber, are connected together by means of a strength member 11 in a place where structural plywood 6 cannot be attached on the backside of the horizontal piece 8 of timber. A flat plate-type strength member 11A and a brace-type strength member 11B are used as the strength member 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for reinforcing a true wall in an existing wooden frame construction method house and a true wall reinforcing structure using the method.

  In the wooden frame construction method house, as shown in Fig. 1, in order to improve the strength of the wall (wall magnification), in the wall part where the upper and lower horizontal members 1, 2 and the left and right columns 3, 4 exist, Are connected by a plurality of horizontal bars 5, and a structural plywood 6 (one of the wall materials for strength) is driven from above. This structure is also used for seismic reinforcement of existing wooden framed construction houses, and it is possible to construct only the walls that need reinforcement from the indoor side. Patent document 1 is the example.

Japanese Patent Laid-Open No. 2004-263500

  In the conventional reinforcing structure, a plurality of horizontal beams 5 are attached between columns 3 and 4 erected between upper and lower horizontal members 1 and 2, and a structural plywood extends over the columns 3 and 4 and the horizontal beam 5 from above. 6 is used as a bearing wall, so it is relatively easy to construct in the case of a large wall structure. However, in the case of a true wall structure, as shown in FIGS. 2 and 3 (in order to show the structure, the inner wall material is removed and the outer wall material is omitted), the through 7 and the long press 8, the peripheral edge 9a, and the splint 9b It cannot be constructed in the same way. That is, it is difficult to place the cross rail 5 because the through 7 exists. Further, if the through hole 7 is removed, the through hole 10 remaining in the pillars 3 and 4 is obstructed, and there is a place where the hardware for fixing the horizontal beam 5 cannot be fixed to the column, and the horizontal beam 5 cannot be disposed at an appropriate position. In addition, if only the inner wall is removed and the ceiling and flooring materials are left as they are in order to keep the construction on a small scale, the floor 7 or the floor located above the ceiling line (C / L) or near the ceiling, or the floor It is difficult to remove the through 7 located near (floor line F / L), and it is also difficult to remove the through 7 located on the back side (outside of the outside) of the peripheral edge 9a and the long press 8. is there.

In addition, the long press 8 and the peripheral edge 9a are attached by providing notches in the columns 3 and 4, and are located on the inner side (outside of the room) from the indoor side surface of the column 4 (FIG. 4). The structural plywood 6 that needs to be attached continuously across the horizontal rails 5 and 5 is cut up and down, and the structural plywood 6 that is continuous on the back side (outdoor side) of the long press 8 and the attachment head 9b is provided. Difficult to place. Furthermore, the long press 8, the peripheral edge 9a, and the splint 9b are exposed to the indoor side, and are continuous on one wall surface of the four walls constituting the room. If it is removed, even if repaired after construction, only that part will stand out differently from other parts. Then, if the long press 8 and the surrounding edge 9a are left as they are, and the construction is made by using the cross rail 5 and the structural plywood 6, the upper structural plywood 6 and the lower structural plywood on the back side of the long pressing 8 and the surrounding edge 9a. These will be attached with the space between them 6 and the degree of reinforcement will be reduced.
In the present invention, a plurality of horizontal beams 5 are attached between columns 3 and 4, and a structural plywood 6 or the like (hereinafter referred to as a load-bearing wall material 6) is applied to the columns 3 and 4 and the horizontal beam 5 for reinforcement. It is an object of the present invention to provide a reinforcing method and a structure that can apply the reinforcing structure to a true wall portion of an existing house by a wooden frame construction method.

At the true wall location of the existing house, the load-bearing wall material 6 is attached to the horizontal beam 5 disposed between the left and right columns 3 and 4 separately (with a gap) above and below the long press 8 and positioned above and below the long press 8. The crosspieces 5a and 5b are joined by a load bearing member 11 (FIGS. 6 and 8) that resists the shearing force applied to the wall.
The load bearing member 11 includes a flat plate type 11A and a bracing type 11B, both of which are attached between the lower surface of the upper horizontal beam 5a and the upper surface of the lower horizontal beam 5b, and are thus continuous between the horizontal beams 5a and 5b. Can be attached.
The reinforcement hardware 12 may be used in combination with the top and bottom horizontal members 1 and 2 and the tops and column bases of the left and right columns 3 and 4, respectively, to enhance the earthquake resistance.

A load bearing member that resists the shearing force that the shaft assembly (column + horizontal member + wall surface material) receives on the back side of the true wall where the long press 8 is disposed and where the load bearing wall material 6 cannot be continued vertically 11, the true wall portion can be reinforced to the same extent as in the case of the large wall.
Since the long press 8 and the surrounding edge 9a are not removed, the indoor atmosphere after construction does not change from before construction.

[Example 1]
FIG. 5 is a reinforcing structure as a result of carrying out the reinforcing method (construction method) according to the present invention, and is a reinforcing structure (referred to as a reinforcing true wall) obtained by reinforcing the true wall portion (referred to as an existing true wall) in FIG. The structure of the present invention will be described together with the procedure of the reinforcing method.
The long push 8 of the existing true wall 8, the surrounding edge 9a, and the splint 9b are left as they are without being damaged, and the inner wall material is removed. Next, the through 7 located between the pillars 3 and 4 on both sides is removed by cutting or the like. At this time, the penetration 7 above the ceiling line (C · L) and the penetration 7 below the floor line (F · L) may be left as they are. In this embodiment, the through 7 above the ceiling line (C · L) is left, and the through 7 below the floor line (F · L) is removed. After removing the through hole 7, the through hole 10 remains in the columns 3 and 4.

  Five horizontal bars 5 (horizontal bars 5a to 5e) are abutted against the inner surfaces of the left and right columns 3 and 4, and are attached to the columns 3 and 4 using L-shaped hardware 13 above and below each end. Two of these horizontal bars 5 are arranged close to the top and bottom of the long press 8 in a front view, and as a result, two horizontal bars 5 are arranged with two above the long press 8 and three below. Yes. The horizontal bars 5 arranged close to the upper and lower sides of the long press 8 will be particularly referred to as a connecting upper horizontal bar 5a and a connecting lower horizontal bar 5b. The interval between the horizontal bars 5 is determined in accordance with the vertical dimension of the load-bearing wall material 6 to be attached.

As shown in the figure, the horizontal beam 5 is attached by fixing the vertical beam 14 to the inner surfaces of the columns 3 and 4, and then fixing both ends of the horizontal beam 5 to the vertical beam 14 using L-shaped hardware 13. Yes. When the vertical beam 14 is used, the L-shaped metal piece 13 can be used without being obstructed by the through hole 10, and the vertical wall 14 of the load-bearing wall material 6 is attached to the vertical beam 14, whereby the load-bearing wall material 6. Can be firmly fixed to the frame.
In the first embodiment, the joints between the pillar heads of the columns 3 and 4 and the upper horizontal member 1 are fastened with a hole-down type pull-out resistance metal 15, and the column base and the lower horizontal member are fastened with a hole-down hardware 16. is doing. The hole-down type reinforcement hardware (pull-out resistance metal) 15 has a horizontal member side member fixed to the lower surface of the upper horizontal member 1, a column side member fixed to the inner surfaces of the columns 3 and 4, and a drawing bolt. The pulling bolt is inserted into the cylindrical engaging portion of the column side member from below, the upper end is screwed into the horizontal member side member, and the nut is screwed into the portion protruding from the lower portion of the cylindrical engaging portion. At the same time, the columns 3 and 4 are attracted to the upper horizontal member 1 by engaging with the cylindrical engaging portion and tightening the nut.

  Once the upper and lower horizontal members 1, 2 and the left and right columns 3, 4 and the plurality of horizontal beams 5 form a frame, the load-bearing wall material 6 is nailed to the side surfaces of the horizontal beam 5 and the vertical beam 14 with the nails or the like. Fix it. At this time, the space connecting the indoor side surfaces of the connecting upper horizontal beam 5a and the lower connecting horizontal beam 5b is not sufficient to dispose the load bearing wall material 6 with the back side of the long press 8 (outdoor side). During this time, the upper and lower load-bearing wall materials 6 are discontinuous. Therefore, the load bearing member 11 is attached between the upper connecting horizontal beam 5a and the lower connecting horizontal beam 5b.

  In the first embodiment, the load bearing member 11 is a flat plate type 11A, and includes an upper half plate 17 and a lower half plate 18 of a rectangular metal plate (FIG. 6). The upper half plate 17 is formed as an upper mounting piece 20 having an upper side bent horizontally toward the indoor side and having a screw hole 19, and long holes 21a are formed on both sides near the lower side. The lower half plate 18 is formed as a lower mounting piece 23 having a lower side bent horizontally toward the indoor side and having a screw hole 22, and long holes 21b are formed on both sides from the upper side. The long holes 21a and 21b are long in the vertical direction and are formed at the same position, and when they are polymerized, a portion penetrating in the indoor / outdoor direction is generated.

  The vertical dimension of the upper half plate 17 and the lower half plate 18 is such that the lower half portion and the upper half portion overlap each other when the upper half plate 17 and the lower half plate 18 are attached to the upper connecting cross beam 5a and the lower connecting cross beam 5b, respectively (FIG. 8). Each horizontal width is shorter than between the left and right columns 3 and 4, and when attached to the upper and lower connecting horizontal bars 5a and 5b, the hand can be turned to the back side between the columns 3 and 4 on both sides. It is said that the interval of remains. The long holes 21a and 21b are formed at positions where the bolts and nuts 24 can be operated by a hand that is turned around to the back side.

  The upper half plate 17 applies the upper mounting piece 20 to the lower surface of the connecting upper horizontal beam 5a and screws it from the indoor side (FIG. 8), and the lower half plate 18 connects the lower mounting piece 23 to the lower horizontal beam 5b for connecting. Attach to the top surface with screws from the room side. Next, the overlapped portion is fastened with bolts and nuts 24 through the long holes 21a and 21b. The variation in the vertical dimension between the connecting upper horizontal beam 5a and the lower connecting horizontal beam 5b can be adjusted by the positions of the long holes 21a and 21b with respect to the bolts and nuts 24.

  With the above structure, the upper and lower horizontal members 1, the left and right columns 3, 4, the plurality of horizontal rails 5, the load-bearing wall material 6, and the load-bearing member 11 constitute a frame. In this frame structure, a plurality of horizontal beams 5 are fixed by a load-bearing wall material 6, and further, a lack of reinforcement by the load-bearing wall material 6 separated vertically at the back portion of the long press 8 (the upper horizontal beam 5 a for connection) Since the connecting lower horizontal bars 5b) are connected by the load-bearing members 11, the same reinforcing effect as that for the large wall can be obtained despite the presence of the long press 8. Since the upper half plate 17 and the lower half plate 18 are formed by bending the upper mounting piece 20 and the lower mounting piece 23 to the indoor side, as shown in FIG. They can be mounted without interfering with them and thus without damaging them.

[Example 2]
The arrangement of the upper half plate 17 and the lower half plate 18 may be reversed as shown in FIG. The upper half plate 17 and the lower half plate 18 may be attached to the horizontal rail 5 in advance, and then disposed between the left and right columns 3 and 4 for attachment.
Example 3
10 and 11 are examples in which the load bearing member 11 is formed from a single metal member 28. The upper side and the lower side of the metal member 28 are bent to the indoor side to form an upper mounting piece 20 and a lower mounting piece 23 similar to those in the first embodiment. At the time of attachment, although the space between the upper and lower sides cannot be adjusted, it can be attached in the same state as in FIG. 8 between the upper connecting horizontal beam 5a and the lower connecting horizontal beam 5b as in the first embodiment. There is an advantage that the structure is simple and can be provided at low cost.

Example 4
12 and 13, the structure in which the strength member 11 is arranged between the upper connecting horizontal beam 5a and the lower connecting horizontal beam 5b in the first embodiment is modified, and the upper horizontal beam 5a is not used and the upper horizontal beam 5a is not used. Use the crosspiece 5c. That is, the load bearing member 11 is attached between the connecting lower horizontal beam 5b (simply referred to as the horizontal beam 5b) and the horizontal beam 5c. Although the uppermost through 7 must be removed, the number of crosspieces 5 can be reduced, and the effort of attaching a smaller load bearing wall material 6 above the load bearing member 11 can be saved. Further, if the auxiliary vertical beam 29 which is the same as the vertical beam 14 is used in the upper part of the long press 8, the vertical side of the load-bearing wall material 6 can be fixed to the indoor side surface of the auxiliary beam. The flutter of 6 can be suppressed and it can be attached securely. Furthermore, when the auxiliary vertical rail 29 is used, the four horizontal rails 5 can be aligned to the same length, and the work is easy.
In FIG. 12, the reinforcing hardware 15 (12) is shown in a removed state for easy understanding of the drawing.

As the load bearing member 11 used in the fourth embodiment, one having the structure as shown in the first to third embodiments can be used, but one having a large vertical dimension is required. Further, the load bearing member 11 of the fourth embodiment has the same structure as that of the first and second embodiments, but the upper half plate 17 and the lower half plate 18 have the same size and the same form. When rotated by 180 °, the lower half plate 18 is obtained, so that it can be used in common at the top and bottom. That is, it is only necessary to prepare two types of products.
If it demonstrates as the upper half board 17, the upper attachment piece 20 will be formed in the upper side, and the notch 30 which becomes deep upwards in the center of a lower side is formed, and it is a U-shaped form as a whole. Long holes 21a and 21b are provided at portions corresponding to both legs of the U-shape. The size of the notch 30 is 150 mm deep and 200 mm wide in this embodiment.

As shown in FIG. 12, the upper half plate 17 and the lower half plate 18 are attached by overlapping a part between the upper horizontal beam 5c and the lower horizontal beam 5b sandwiching the back portion of the long press 8 up and down. Then, the working hole 31 (FIG. 12) penetrating indoors and outdoors can be made to the extent that the wrist can be inserted into the center of the load bearing member 11 by superposition of the notches 30, 30 at the superposition location. It is possible to operate the bolts and nuts 24 inserted into the long holes 21a and 21b by inserting their hands to the back side. By forming the working hole 31, the side of the load-bearing member 11 is blocked by the auxiliary vertical rail 29, and even if the hand cannot be inserted, the upper half plate 17 and the lower half are formed using the bolts and nuts 24. The plate 18 can be securely fixed. Further, since it is not necessary to provide a space for inserting hands on both the left and right sides of the upper half plate 17 and the lower half plate 18, the widths of the upper half plate 17 and the lower half plate 18 are made sufficiently large so The resistance of the set can be increased.
In Example 4, a notch 30 is formed in the center of the lower side or the upper side of the upper half plate 17 and the lower half plate 18, respectively, so that when these are overlapped, a through hole is formed in the indoor / outdoor direction. However, the present invention is not limited to this, and any structure may be used as long as the upper half plate 17 and the lower half plate 18 are superposed to form a through-hole penetrating in the indoor / outdoor direction so that the wrist can be inserted into the superposed portion.

Example 5
The fifth embodiment is different from the first to fourth embodiments in the structure of the load bearing member 11. As shown in FIG. 14, the strength-bearing member 11 of the fifth embodiment is a bracing type 11 </ b> B that includes two bracing members 25 that intersect with each other and mounting pieces 26 a and 26 b at both ends. The mounting pieces 26a and 26b are screwed against the lower surface of the upper connecting horizontal rail 5a and the upper surface of the lower connecting horizontal rail 5b. The bracing member 25 is a metal flat plate, and the attachment pieces 26a and 26b are L-shaped members that integrally have a horizontal portion and a vertical portion by pressing a rectangular metal plate in this embodiment. A vertical portion of each attachment piece 26 is rotatably attached to an end portion of the bracing member 25 with a bolt / nut 27 or the like.

In the same manner as in the case of the flat plate type 11A, the brace strength members 11B are screwed to the lower surface of the upper cross rail 5a for connection from the indoor side with the attachment pieces 26a, 26a on the upper end side of the cross bracing members 25, 25, Further, the attachment pieces 26b, 26b on the lower end side are attached to the upper surface of the connecting lower horizontal rail 5b by screwing from the indoor side. Thereby, the location where the reinforcement structure by the load-bearing wall material 6 is divided on the back side of the long press 8 is connected, and the reinforcement effect almost similar to the case of the large wall in which the load-bearing wall material 6 is continuous is provided as described above. Obtainable.
In the case of the bracing strength member 11B, the vertical angle between the connecting upper horizontal beam 5a and the connecting lower horizontal beam 5b can be adjusted by changing the crossing angle of the bracing members 25, 25.

Since the flat plate type strength member 11B firmly fixes the space between the upper horizontal beam 5a for connection and the lower horizontal beam 5b for connection by a flat plate, the frame body has a rigid structure against the shearing force received by the wall. The bracing strength member 11B follows the deformation of the frame body to some extent because the attachment pieces 26a and 26b can rotate at the end of the bracing member 25 and the two bracing members 25 are not connected. It becomes a flexible structure against the shearing force that the wall receives. The flexible structure is sticky to deformation, making it easy to prevent complete collapse of the house.
Even the bracing type 11B can be used by being attached between the upper horizontal beam 5c and the lower horizontal beam 5b as in the fourth embodiment.

The embodiment has been described above. It is important that the load-bearing member 11 has rigidity capable of resisting the shearing force received by the shaft set and can be fixed from the indoor side to the lower surface of the connecting upper horizontal beam 5a and the upper surface of the connecting lower horizontal beam 5b.
The load bearing member 11 can also be formed of a single metal plate whose vertical dimension cannot be adjusted.
Furthermore, L-shaped hardware can be attached to the upper side and the lower side of the structural plywood to form the load bearing member 11. This is fixed between the lower surface of the upper connecting cross beam 5a and the upper surface of the lower connecting cross beam 5b from the indoor side by using hardware on the upper side and the lower side.

Front view of reinforced wall structure (conventional example) Front view from the indoor side explaining the frame of the true wall with long press Side view showing the section of the true wall in cross section Side view showing the frame of the true wall (enlarged main part during conventional reinforcement) Front view seen from the outdoor side of the true wall where the strength member is attached (Example 1) Perspective view of flat plate bearing member (disassembled) Perspective view of flat-type load-bearing member (Example 1) Longitudinal sectional view of a true wall with a load bearing member (partially enlarged) Front view seen from the outdoor side of the true wall where the strength member is attached (Example 2) Front view seen from the outdoor side of the true wall where the strength member is attached (Example 3) Perspective view of flat-type load bearing member (Example 3) Front view as seen from the outdoor side of the true wall where the strength member is attached (Example 4) Perspective view of flat-type load bearing member (Example 4) Perspective view of bracing strength members

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper horizontal material 2 Lower horizontal material 3 Left column 4 Right column 5 Horizontal beam 5a Upper horizontal beam for connection 5b Lower horizontal beam for connection 6 Wall material for load-bearing (plywood for structure)
7 through 8 long press 9a surrounding edge 9b splint 10 through hole 11 bearing member 11A flat plate bearing member 11B bracing bearing member 12 reinforcement bracket 13 L-shaped bracket 14 vertical rail 15 hole down type reinforcement bracket 16 hole down bracket 17 upper half Plate 18 Lower half plate 19 Screw holes 20 Upper mounting pieces 21a, 21b Long holes 22 Screw holes 23 Lower mounting pieces 24 Bolts / nuts 25 Bracing members 26a, 26b Mounting pieces 27 Bolts / nuts 28 One continuous metal member 29 Auxiliary Vertical beam 30 Notch 31 Working hole

Claims (10)

  This is a method of reinforcing a true wall structure with a long press in an existing house, removing the inter-column members that connect the left and right columns, such as the inner wall material and penetration, in the reinforcement location without damaging the long press, ceiling material, and flooring. After that, join the left and right pillars with a plurality of horizontal rails and apply the load bearing wall material between the upper and lower horizontal rails. On the back side of the long press, the upper horizontal rail for connection and the lower Install the horizontal beam close to the long press, and replace it with the load-bearing wall material between the upper horizontal beam for connection and the lower horizontal beam for connection, and the inside of the lower surface of the upper horizontal beam for connection and the upper surface of the lower horizontal beam for connection. A method of reinforcing a true wall in an existing house, comprising a mounting piece that can be fixed from a wall and fixing a load bearing member against shearing force applied to the wall.   Before installing the horizontal beam, the vertical beam is fixed to the inner surface of the left and right columns, and both ends of the horizontal beam are fixed to the vertical beam, so that the left and right columns are connected by multiple horizontal beams. The true wall reinforcement method in the existing house of Claim 1.   3. The true wall reinforcing structure in an existing house according to claim 1 or 2, wherein a pulling resistance metal is used at a joint portion between the horizontal member and the pillar constituting the true wall to reinforce the joint portion.   This is a true wall structure reinforcement structure with a long push in an existing house, in which the left and right pillars are joined by a plurality of horizontal rails in the frame from which the members between the left and right pillars such as penetrations at the reinforcement points are removed. The upper and lower horizontal rails are joined by a load-bearing wall material, and on the back side of the long press, the lower beam of the upper horizontal beam is replaced with the load-bearing wall material between the horizontal beams located above and below the long press as viewed from the front. A true-wall reinforcing structure in an existing house, characterized in that a load-bearing member that resists the shearing force applied to the wall is continuously connected to the upper surface of the lower cross rail and an attachment piece that can be fixed from the indoor side.   This is a true wall structure reinforcement structure with a long push in an existing house, in which the left and right pillars are joined by a plurality of horizontal rails in the frame from which the members between the left and right pillars such as penetrations at the reinforcement points are removed. On the back side of the long press, the upper horizontal beam for connection and the lower horizontal beam for connection are mounted close to the long press at the vertical position of the long press as viewed from the front, and the upper and lower horizontal beams are connected by a load-bearing wall material. The wall between the upper horizontal beam for connection and the lower horizontal beam for connection is provided with a mounting piece that can be fixed from the inside to the lower surface of the upper horizontal beam for connection and the upper surface of the lower horizontal beam for connection, instead of the wall material for strength. A true-wall reinforcing structure in an existing house, which is connected by a load-bearing member that resists the shearing force applied to the housing.   The true-wall reinforcing structure in an existing house according to claim 4 or 5, wherein the load bearing member is a rectangular metal plate and includes an attachment piece whose upper side and lower side are bent horizontally toward the indoor side.   The load bearing member is composed of an upper half plate and a lower half plate of a rectangular metal plate, and an upper mounting piece that is bent horizontally toward the indoor side is formed on the upper side of the upper half plate, and horizontally toward the indoor side on the lower side of the lower half plate. 6. The existing housing according to claim 5, wherein a bent lower mounting piece is formed, and the upper half plate and the lower half plate are partially overlapped, and the portion is fixed with a bolt and a nut. True wall reinforcement structure.   The upper half plate and the lower half plate can be fixed by adjusting the dimensions of the upper part and the lower part by combining a part of the partially overlapped long hole and bolt and nut. Item 7. A true wall reinforcement structure for an existing house according to Item 6.   The true wall reinforcing structure according to claim 7 or 8, wherein when the upper half plate and the lower half plate are superposed, a working hole penetrating in the indoor / outdoor direction is formed so that the wrist can be inserted into the superposed portion.   5. The true-wall reinforcing structure in an existing house according to claim 4, wherein the strength member is a brace that joins between the upper horizontal rail for connection and the lower horizontal rail for connection.

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