JP6974186B2 - Outer wall fixed structure - Google Patents

Description

The present invention relates to an outer wall fixing structure of a building.

Patent Document 1 discloses a mounting structure of a thin-painted ALC panel in which an anchor is not embedded inside. The mounting bracket used in the mounting structure of this ALC panel is provided so that the standing piece and the edge contact piece form a small space between the joints, and the nut stands up and is fixed. The mounting bracket and the ALC panel are fixed by screwing the bolt inserted from the counterbore portion dug on the surface side of the ALC panel with the nut.

According to the mounting structure of the ALC panel having the above configuration, it can be mounted only from the surface side of the ALC panel, the end face of the ALC panel is accurately positioned at a predetermined position, the joint spacing between the panels is reduced, and sufficient mounting strength is obtained. Is to have.

Japanese Unexamined Patent Publication No. 10-131366

By the way, when an ALC (lightweight cellular concrete) panel is used as an outer wall of a building, a vertical wall of the ALC panel having a predetermined reference width is used, for example, an anchor and mounting hardware installed in the middle portion in the width direction of the ALC panel. There is a method of attaching an ALC panel to the building frame. Here, if an ALC panel narrower than a predetermined reference width can be used, the degree of freedom in design such as moving an opening portion such as a sash to the end is increased. However, when processing an ALC panel having a predetermined reference width in order to obtain a narrow ALC panel, a portion including an anchor is cut off, and the obtained narrow ALC panel has a structure without an anchor. In that case, it is necessary to separately provide a fixed structure for the outer wall.

In addition, the conventional ALC panel mounting structure proposed for thin-painted ALC panels without anchors has a complicated structure of mounting brackets to be used, and in order to improve the mounting strength, it is separately used. Since it is necessary to attach other fixing brackets to other building frames, the number of members increases. Further, since bolts are inserted and attached from the counterbore portion dug on the surface side of the ALC panel, it is necessary to repair the counterbore portion.

In view of the above facts, the present invention can reinforce a narrow ALC outer wall panel without anchors, while being able to be fixed to a beam or foundation with a simple configuration with fewer members, as well as counterbore and counterbore portions. The purpose is to obtain an outer wall fixing structure that does not require repair.

The outer wall fixing structure according to the first aspect includes an ALC outer wall panel which is narrower than a reference width and is formed in a straight line with no bent portion in a plan view without an anchor, and the design surface side of the ALC outer wall panel. Is fixed to the back surface of the ALC outer wall panel by a screw penetrating the ALC outer wall panel, abuts on the back surface of the ALC outer wall panel, and extends from the lower end to the vicinity of the upper end of the ALC outer wall panel. The lower part is provided with an upper mounting member and a reinforcing plate provided with a lower mounting member, which are configured to be mountable directly to the beam or the foundation or via other members.

According to the outer wall fixing structure according to the first aspect, the reinforcing plate screw-fixed to the back surface of the ALC outer wall panel having no anchor and narrower than the reference width comes into contact with the ALC outer wall panel and the lower end of the ALC outer wall panel. The narrow ALC outer wall panel is reinforced by extending from to near the upper end. The reinforcing plate is attached to the beam or the foundation by the upper mounting member and the lower mounting member provided on the upper part and the lower part of the reinforcing plate, and as a result, the ALC outer wall panel is fixed to the beam or the foundation. By adopting a configuration in which the mounting member is provided on the reinforcing plate having a reinforcing function, the reinforcing plate and the mounting member are fixed to the ALC outer wall panel, and further fixed to the building frame by the mounting member. ALC exterior wall panels without anchors can be fixed to beams or foundations with a simple configuration with few members.

Further, in order to fix the reinforcing plate to the back surface of the ALC outer wall panel, a screw inserted from the design surface side of the ALC outer wall panel is used. For this reason, it is only necessary to fill a small dent with the diameter of the head of the screw with putty, and to perform the counterbore work required when embedding bolts, nuts, washers, etc. in the ALC outer wall panel, and the counterbore part. No repair required.

The outer wall fixing structure according to the second aspect is configured in the outer wall fixing structure according to the first aspect so that the upper mounting member can be directly attached to the beam, and the lower mounting member is fixed to the foundation and the pillar. It is configured to be attachable to the foundation via a column base plate to which the lower end portion of the is connected.

According to the outer wall fixing structure according to the second aspect, the upper mounting member is directly fixed to the beam, and the lower mounting member is fixed to the foundation via the column base plate fixed to the foundation. Since the column base plate, which is also used for fixing other building members, is used, no additional members are required to fix the ALC outer wall panel, even if it is a narrow ALC outer wall panel without anchors. The ALC outer wall panel can be fixed to the beam or foundation with a simple configuration with few members.

The outer wall fixing structure according to the third aspect is configured such that the upper mounting member and the lower mounting member can be directly attached to the beam in the outer wall fixing structure according to the first aspect.

According to the outer wall fixing structure according to the third aspect, the ALC outer wall panel is fixed by directly attaching the upper mounting member and the lower mounting member provided on the reinforcing plate to the beam. Since the upper mounting member and the lower mounting member are directly fixed to the beam which is the building frame, even a narrow ALC outer wall panel without an anchor can be fixed to the building frame by a simple configuration with a small number of members. Can be done.

The outer wall fixing structure according to the fourth aspect is configured in the outer wall fixing structure according to the first aspect so that the upper mounting member can be directly attached to the beam, and the lower mounting member is a waterproof base fixed to the beam. It is configured to be attachable to the beam via a material.

According to the outer wall fixing structure according to the fourth aspect, the lower mounting member is fixed to the beam via the waterproof base material. Even in a configuration where it is difficult to fix directly to the beam, the waterproof base material is used, so no additional member is required to fix the ALC outer wall panel, and it is a narrow ALC outer wall panel without anchors. The ALC outer wall panel can be fixed to the beam by a simple configuration with a small number of members.

The outer wall fixing structure according to the fifth aspect is the outer wall fixing structure according to any one of the first to fourth aspects, wherein the reinforcing plate is substantially from the back surface of the ALC outer wall panel along the side surface of the ALC outer wall panel. It has a bent portion that is bent vertically.

According to the outer wall fixing structure according to the fifth aspect, since the reinforcing plate fixed to the back surface of the ALC outer wall panel includes a bent portion bent along the side surface of the ALC outer wall panel, the reinforcing plate is used as the ALC outer wall panel. Positioning in the width direction when fixing to is easy. Further, since the reinforcing plate is provided with a bent portion, the rigidity of the reinforcing plate is increased. Therefore, the bending and twisting of the reinforcing plate in contact with the back surface of the ALC outer wall panel is suppressed. As a result, damage to the ALC outer wall panel can be suppressed or prevented.

The outer wall fixing structure according to the sixth aspect is the outer wall fixing structure according to any one of the first to fifth aspects, wherein the upper mounting member and the lower mounting member are fixed to the reinforcing plate by welding. At least one of the upper mounting member and the lower mounting member is fixed to the beam or the foundation at at least two points.

According to the outer wall fixing structure according to the sixth aspect, since the upper mounting member and the lower mounting member are fixed to the reinforcing plate by welding, they can be firmly fixed to the reinforcing plate. Further, since at least one of the upper mounting member and the lower mounting member is fixed to the beam or the foundation at at least two points, the rotation of the reinforcing plate is suppressed or prevented as compared with the case where it is fixed at one point. As a result, the fixing of the ALC outer wall panel can be further strengthened.

In the outer wall fixing structure according to the seventh aspect, in the outer wall fixing structure according to the fifth aspect, another building member is fixed to the bent portion.

According to the outer wall fixing structure according to the seventh aspect, since the bent portion of the reinforcing plate can be used as a base for fixing other building members, an additional fixing base for fixing other building members can be used. The number of members can be reduced by effectively utilizing a part of the ALC outer wall fixing structure for other purposes.

As described above, the outer wall fixing structure according to the present invention can fix the ALC outer wall without an anchor to a beam or a foundation by a simple configuration with a small number of members, and can also perform counterbore work and counterbore. It has an excellent effect that it does not require repair of parts.

It is a plan sectional view which shows a part of the 2nd floor part of the building to which the outer wall fixing structure which concerns on this embodiment is applied. It is an enlarged plan sectional view of the arrow view part of line A of FIG. 1, and is also a plan sectional view which shows the inside corner part of the 2nd floor part including the outer wall fixing structure which concerns on this embodiment. It is a schematic diagram which shows how the narrow ALC outer wall panel which does not have an anchor can be obtained by processing the ALC outer wall panel of a reference width. It is a vertical sectional view which shows the outer wall fixing structure which concerns on this embodiment. (A) is a perspective view which shows the lower part of the reinforcing plate and the lower part mounting member of the 1st floor part in the outer wall fixing structure shown in FIG. It is a plan sectional view which shows. FIG. 6 is a sectional view taken along line 6-6 of FIG. It is an enlarged vertical sectional view which shows the main part when the outer wall fixing structure which concerns on this embodiment is applied to the outer wall of the 2nd floor part facing a balcony. 7 is an enlarged view showing a joint portion between the lower mounting member and the reinforcing plate shown in FIG. 7, where FIG. 7A is a perspective view and FIG. 7B is a vertical sectional view. It is a vertical sectional view which shows the structure when the outer wall fixing structure which concerns on this embodiment is applied to a parapet. It is a cross-sectional view which shows the structure in the case where the reinforcing plate of the outer wall fixing structure which concerns on this embodiment is used as the fixing base of a chamber door frame.

Hereinafter, embodiments of the outer wall fixing structure according to the present invention will be described with reference to FIGS. 1 to 10.

<Building structure to which the outer wall fixing structure is applied>
FIG. 1 shows a plan sectional view showing a part of a second floor portion of a building to which the outer wall fixing structure according to the present embodiment is applied. Building 10 is, for example, a three-story house in which a building frame is constructed with a steel frame structure. Here, the second floor portion to which the outer wall fixing structure according to the present embodiment is applied will be described. As shown in FIG. 1, the second floor portion of the building 10 includes balconies 12 and 14 and living rooms 16 and 18. Further, on the outdoor side of the building 10, a plurality of ALC outer wall panels 20 and 22 are arranged side by side in the horizontal direction, and on the outdoor side facing the balconies 12 and 14, two ALC outer wall panels 20 and 22 are arranged on the outdoor side. It is erected at a substantially vertical angle to form the inside corners 24, 26, and 28. Sashes 30, 32 are provided adjacent to the ALC outer wall panel 22 forming the inside corners 24, 26, 28. Of the ALC outer wall panels 20 and 22 forming the inner corners 24, 26 and 28, the ALC outer wall panel 22 adjacent to the sashes 30 and 32 is narrower than the ALC outer wall panel 20 not adjacent to the sashes 30 and 32. It is formed.

FIG. 2 is an enlarged plan sectional view of the arrowhead portion taken along line A of FIG. 1, and also shows an inside corner portion 24 of a second floor portion including an outer wall fixing structure 34 according to the present embodiment. Although details will be described later, the outer wall fixing structure 34 on the second floor includes a narrow ALC outer wall panel 22, a reinforcing plate 38 fixed to the ALC outer wall panel 22 by screws 36, and an indoor surface of the reinforcing plate 38 ( It is configured to include a lower mounting member 40 as an L-shaped "lower mounting member" fixed to the upper part of the back surface) and an upper mounting member 42 (see FIG. 4) as an "upper mounting member". There is.

3 (A) and 3 (B) show narrow ALC outer wall panels 22, 22'with no or part of anchors by cutting ALC outer wall panels 50, 50'of reference width (eg, 490 mm). Is shown to be obtained. As shown in FIG. 3A, anchors 52 and 54 are embedded in the ALC outer wall panel 50 having a reference width at two locations above and below the central portion in the width direction. By cutting the ALC outer wall panel 50 having a reference width along a single straight line, the virtual line B, a narrow ALC outer wall panel 22 that does not include the anchors 52 and 54 can be obtained. As another example, as shown in FIG. 3B, by cutting the reference width ALC outer wall panel 50'with a crank-shaped virtual line C, only the upper anchor 52' is included and the lower anchor is included. A narrow ALC outer wall panel 22'not including 54' is obtained. As an example, the rectangular narrow ALC outer wall panel 22 shown in FIG. 3 (A) is used in the inside corners 24, 26, 28 shown in FIGS. 1 and 2 described above, and is used in FIG. 3 (B). The inverted L-shaped narrow ALC outer wall panel 22'shown is used as an outer wall panel of a general part arranged adjacent to an entrance door opening (not shown). The inverted L-shaped narrow ALC outer wall panel 22'is further divided into two upper and lower rectangular panels, and the ALC outer wall panel including the anchor 52'and the narrow ALC outer wall panel not including the anchor at all are separated. As a result, the outer wall fixing structure 34 according to the present embodiment may be applied to the narrow ALC outer wall panel that does not include the anchor at all.
The "reference width" in the present specification refers to a width adopted when a certain number of ALC outer wall panels of the same standard are manufactured, and the reference width is 490 mm in this embodiment, but it is adopted for a design, for example. The reference width may be another value depending on the size of the pattern to be formed and the like.

FIG. 4 shows a vertical cross-sectional view (shown above the alternate long and short dash line 2SL) showing the lower part of the second floor portion shown as a 4-4 line cross-sectional view of FIG. A vertical cross-sectional view (shown below the alternate long and short dash line 2SL) showing the first floor portion to which the outer wall fixing structure 34 is applied is shown in the same drawing for convenience of explanation. As shown in this figure, the building 10 to which the outer wall fixing structure 34 is applied has a concrete foundation 60 as a base under the building frame constructed by the steel frame structure. Anchor bolts (not shown) are erected on the upper surface of the foundation 60 at predetermined intervals. Further, a column base plate 62 as a rectangular flat plate-shaped "other member" is placed on the upper surface of the foundation 60 at the place where the column is installed. As shown in FIG. 5B, a column fitting portion 64 in which the lower end portion of a column (not shown) is fitted and joined to the column by welding or the like is formed in the central portion of the column base plate 62. There is. Further, the column base plate 62 is formed with a pair of bolt insertion holes 66 with the column fitting portion 64 interposed therebetween at the central portions at both ends in the longitudinal direction. Anchor bolts (not shown) erected on the upper surface of the foundation 60 are inserted into the bolt insertion holes 66 of the column base plate 62 and fastened and fixed by nuts (not shown) to fix the column base plate 62 on the foundation 60. ing. Female threaded portions 68 are formed at the four corners of the column base plate 62.

Returning to FIG. 4, a plurality of columns (not shown) are erected on the foundation 60, and a beam 44 made of H-shaped steel is laid between the upper ends of the columns and the upper ends of the adjacent columns. It constitutes the first floor. A pillar on the second floor (not shown) is erected on the beam 44, and a beam (not shown) is bridged over the upper end of the pillar on the second floor. The beam 44 forming a part of the building frame is made of H-shaped steel whose longitudinal direction is orthogonal to the paper surface in FIG. 4, and the upper flange 44A and lower flange 44B whose plate thickness direction is the vertical direction of the building, and the beam. The width direction of the 44 is the plate thickness direction, and the web 44C connecting the lower surface of the upper flange 44A and the upper surface of the lower flange 44B at the center of each width direction is provided. The upper surface of the upper flange 44A constitutes a slable line (shown as a long and short dash line 2SL) on the upper surface, and the lower flange 44B is supported by a pillar. The upper flange 44A and the lower flange 44B are formed with a plurality of through holes 46 (see FIG. 6) in the longitudinal direction, respectively, on the indoor side and the outdoor side of the connecting portion with the web 44C.

<Structure of main parts of this embodiment>
Next, the configuration of the main part of the outer wall fixing structure 34 will be described in detail.

As shown in FIG. 4, the outer wall fixing structure 34 of the first floor portion includes a narrow ALC outer wall panel 22, a reinforcing plate 38 fixed to the ALC outer wall panel 22 by screws 36, and an indoor surface of the reinforcing plate 38. It is configured to include an upper mounting member 42 as an "upper mounting member" fixed to the upper part of the above, and a foundation side mounting member 72 as a "lower mounting member".

The narrow ALC outer wall panel 22 constituting the main part of the outer wall fixing structure 34 is formed in the shape of a rectangular plate (see FIG. 3A), and is viewed from above the first-order slab line (shown as the alternate long and short dash line 1SL). It extends substantially vertically to the second-order slab line (shown as the alternate long and short dash line 2SL). A reinforcing plate 38 is fixed to the back surface 22B (indoor side surface) of the narrow ALC outer wall panel 22 by screws 36 inserted from the design surface 22A side (outdoor side) of the ALC outer wall panel 22. As an example, the thickness of the ALC outer wall panel 22 including the design surface is 100 mm, the width is 165 mm, 175 mm, 185 mm, and the like.

As shown in FIGS. 4, 5 (A) and 6, the reinforcing plate 38 abuts on the back surface 22B of the ALC outer wall panel 22 and extends from the lower end to the vicinity of the upper end of the ALC outer wall panel 22 with the base 38A. , Made of metal composed of a bent portion 38B formed by extending from one end in the width direction of the base 38A to the outdoor side and being bent substantially vertically from the back surface 22B of the ALC outer wall panel 22 along one side surface 22C. It is a board of. In the embodiment shown in FIG. 6, the width of the base 38A of the reinforcing plate 38 is the same as the width of the ALC outer wall panel 22, but in order to avoid interference with other members, for example, the opening frame, the base 38A of the reinforcing plate 38 The width of the ALC outer wall panel 22 may be narrower than the width of the ALC outer wall panel 22. The bent portion 38B extends from the lower end to the upper end of the reinforcing plate 38, and stands substantially vertically from one end in the width direction of the base 38A to the outdoor side, and is in contact with the side surface 22C of the ALC outer wall panel 22. It serves as a guide for positioning in the width direction when the reinforcing plate 38 is fixed to the ALC outer wall panel 22.

As shown in FIGS. 4 and 6, the screw 36 for fixing the reinforcing plate 38 to the ALC outer wall panel 22 is inserted from the design surface 22A side of the ALC outer wall panel 22 and penetrates the base 38A of the reinforcing plate 38. It protrudes to the outdoor side of the base 38A. The reinforcing plate 38 is inserted so that the screws 36 are arranged at the center in the width direction of the base 38A of the reinforcing plate 38, and a plurality of screws 36 are inserted at a predetermined pitch (for example, 500 mm) in the vertical direction. Is fixed to the ALC outer wall panel 22. The reinforcing plate 38 may be temporarily fixed with an adhesive before being screwed to the ALC outer wall panel 22.

As shown in FIG. 4, the base 38A of the reinforcing plate 38 on the first floor is attached to the column base plate 62 at the lower end of the surface (rear surface) opposite to the surface abutting the ALC outer wall panel 22. The foundation side mounting member 72 as a possiblely configured "lower mounting member" is joined by welding. Further, an upper mounting member 42 as an "upper mounting member" configured to be mountable on the lower flange 44B of the beam 44 is joined to the upper end of the back surface of the base 38A by welding.

As shown in FIGS. 4 and 5A, the foundation side mounting member 72 has a bottom wall portion 72A mounted on a column base plate 62 fixed on the foundation 60 and a longitudinal direction of the beam 44. It is composed of a vertical wall portion 72B whose plate thickness direction is 1, and is formed in an L shape when viewed from the outdoor side. As shown in FIG. 5A, an insertion hole 74 is formed in the bottom wall portion 72A, and the insertion hole 74 is a female screw portion 68 formed in the column base plate 62 (see FIG. 5B). It is arranged coaxially with and is fastened and fixed by a male screw 70 (see FIG. 4). As shown in FIG. 5A, the vertical wall portion 72B is joined by welding with the upper portion of the side surface on the outdoor side abutting against the lower end of the back surface of the base portion 38A of the reinforcing plate 38. The lower part of the outdoor side surface of the vertical wall portion 72B is not joined to the base 38A of the reinforcing plate 38, and the vertical wall portion 72B protrudes below the lower end of the base 38A, so that the bottom wall portion 72A is reinforced. It is located below the lower end of the base 38A of the plate 38. As a result, the ALC outer wall panel 22 is fixed to the column base plate 62 on the foundation 60 via the foundation side mounting member 72 in a state where the lower end of the ALC outer wall panel 22 and the foundation 60 are separated in the vertical direction. (See Fig. 4).

As shown in FIGS. 4 and 6, the upper mounting member 42 is attached to the beam 44 by being abutted against the lower surface of the lower flange 44B of the beam 44 and fastened and fixed, and the reinforcing plate 38. It is composed of a joint portion 42B joined by welding to the upper end of the back surface of the base portion 38A, and is formed in an L shape when viewed from the side surface of the ALC outer wall panel 22. Two mounting holes 48 are formed in the mounting portion 42A in the longitudinal direction (see FIG. 6), and the distance between the two mounting holes 48 is one of the through holes 46 formed in the lower flange 44B of the beam 44. It is configured to be the same as the distance between the two. The two mounting holes 48 of the mounting portion 42A are arranged coaxially with the two through holes 46 on the outdoor side of the lower flange 44B, and the bolt 76 inserted from the side of the lower flange 44B is screwed into the nut 78 to be fastened and fixed. Has been done. At this time, the outdoor side end portion of the mounting portion 42A is configured to protrude to the outdoor side from the outdoor side end portion of the lower flange 44B. As a result, the outdoor side ends of the upper flange 44A and the lower flange 44B of the beam 44 and the back surface of the ALC outer wall panel 22 are separated from each other, and a clearance is provided as an adjustment allowance for an error in building the skeleton. There is.

The joint portion 42B of the upper mounting member 42 is joined by welding with the lower portion of the surface on the outdoor side abutting against the upper end of the back surface of the base portion 38A of the reinforcing plate 38. Since the fixing position of the joint portion 42B in the width direction of the base portion 38A is determined by the relative relationship between the position of the through hole 46 of the lower flange 44B of the beam 44 and the installation position of the ALC outer wall panel 22, FIGS. 2 and 6 As shown in the above, the upper mounting member 42 may be fixed at a position protruding outward in the width direction of the ALC outer wall panel 22, or may be fixed at a position within the width of the ALC outer wall panel 22. Further, the fixed position of the joint portion 42B in the width direction of the base portion 38A may be closer to the end portion side where the bent portion 38B is formed (see FIG. 6), or the end portion on the opposite side to the bent portion 38B. You may stop by (see Fig. 2). In the present embodiment, only one foundation side mounting member 72 as the "lower mounting member" is joined to the lower end of the reinforcing plate 38, but two foundation side mounting members 72 are joined to the lower end of the reinforcing plate 38. You may try to do it. Further, in the present embodiment, the upper mounting member 42 is provided with two mounting holes 48, but three or more may be provided. Further, in the present embodiment, the foundation side mounting member 72 and the upper mounting member 42 are joined to the reinforcing plate 38 by welding, but at least a part of the lower end and the upper end of the base portion 38A of the reinforcing plate 38 is bent, respectively. The foundation side mounting member 72 and the upper mounting member 42 may be formed by a method and integrally molded with the reinforcing plate 38.

As shown in FIG. 4, when a narrow ALC outer wall panel 22 is applied to the second floor portion, a lower mounting member 40 as a "lower mounting member" is joined to the lower end of the reinforcing plate 38 by welding. The ALC outer wall panel 22 is fixed to the beam 44 by fastening and fixing the lower mounting member 40 to the upper flange 44A of the beam 44. The lower mounting member 40 has the same configuration as the upper mounting member 42 as the "upper mounting member" of the first floor portion, but is mounted on the upper flange 44A in the direction upside down from the upper mounting member 42. That is, the mounting portion 40A of the lower mounting member 40 is placed in contact with the upper surface of the upper flange 44A, and the bolt 80 is inserted into each of the two mounting holes 48 (see FIG. 2) from the side of the upper flange 44A. Then, it is screwed into the nut 82 and fastened and fixed at two points. The joint portion 40B extends upward from the outdoor side end portion of the mounting portion 40A, is in contact with the lower end of the back surface of the base portion 38A of the reinforcing plate 38 of the second floor portion, and is joined by welding. The upper end of the reinforcing plate 38 of the second floor portion is fixed to the lower flange of the upper beam (not shown) of the second floor portion via the upper mounting member 42 in the same manner as the fixing of the upper end of the first floor portion shown in FIG. ing.

As shown in FIG. 7, when the narrow ALC outer wall panel 22 is applied to the portion facing the balcony on the second floor, the balcony ALC floor 84 and the fireproof material 86 are arranged under the ALC outer wall panel 22. At the same time, the start-up of waterproofing is formed by the waterproof base material 88 as "another member". Therefore, the distance between the lower end of the reinforcing plate 38 and the upper flange 44A of the beam 44 is large, and the reinforcing plate 38 cannot be directly attached to the upper flange 44A by the lower mounting member 40. Therefore, the hook metal fitting 90 as the "lower mounting member" is joined to the vicinity of the lower end of the back surface of the base portion 38A by welding, and is hooked on the upper end of the waterproof base material 88 fixed to the upper flange 44A to obtain the waterproof base material 88. The reinforcing plate 38 is attached to the upper flange 44A via the above.

As shown in FIGS. 8A and 8B, the hook metal fitting 90 has a first vertical wall portion 90A that is brought into contact with the vicinity of the lower end of the back surface of the base portion 38A of the reinforcing plate 38 and is joined by welding. A stepped portion 90B extending diagonally downward from the lower end of the first vertical wall portion 90A to the indoor side, and a second vertical wall portion 90C extending downward in parallel with the base portion 38A of the reinforcing plate 38 from the lower end of the stepped portion 90B. It is composed of a guide portion 90D extending diagonally downward from the lower end of the second vertical wall portion 90C to the indoor side. The waterproof base material 88 to which the hook metal fitting 90 is attached is composed of a base portion 88A bolted to the upper flange 44A of the beam 44 and a rising portion 88B extending upward from the indoor side end portion of the base portion 88A. (See FIG. 7). The hook metal fitting 90 fixes the reinforcing plate 38 to the waterproof base material 88 by sandwiching the rising portion 88B of the waterproof base material 88 between the second vertical wall portion 90C and the back surface of the base portion 38A of the reinforcing plate 38. It is configured in. Therefore, the step between the first vertical wall portion 90A and the second vertical wall portion 90C (distance d between the back surface of the base portion 38A of the reinforcing plate 38 and the second vertical wall portion 90C) is the rising portion 88B of the waterproof base material 88. It is set to be substantially the same as the plate thickness of. The guide portion 90D is provided as a guide for facilitating the hooking metal fitting 90 when it is attached to the waterproof base material 88. In the present embodiment, the hook metal fitting 90 has a width of 50 mm, a height of 85 mm, and a step (distance d) between the first vertical wall portion 90A and the second vertical wall portion 90C of 4 mm. Two are provided at the same height near the lower end of the back surface of the base 38A of the reinforcing plate 38, but other dimensions may be used depending on the thickness of the waterproof base material 88, the width of the ALC outer wall panel 22, and the like. Three or more may be provided.

FIG. 9 shows a vertical sectional view showing a configuration when the outer wall fixing structure 34 according to the present embodiment is applied to the parapet. The narrow ALC outer wall panel 100 applied to the parapet portion of the top floor (3rd floor) is extended above the main body 102 covering the outdoor side of the top floor and the roof slab line (shown as a virtual line RSL). The parapet portion 104 formed in the above is integrally formed. Similarly, the reinforcing plate 106 is also the back surface of the parapet portion 104 of the ALC outer wall panel 100, which is extended above the roof slab line (RSL) and the main body portion 108 which is in contact with the back surface of the main body portion 102 of the ALC outer wall panel 100. The extension portion 110 that is in contact with the surface is integrally formed. The main body 108 includes a base 108A and a bent 108B, and the extension 110 includes a base 110A and a bent 110B. An upper mounting member 112 as an "upper mounting member" is joined to the lower end of the back surface of the base portion 110A of the extension portion 110 by welding. The upper mounting member 42 as the "upper mounting member" of the first floor portion shown in FIG. 4 is joined to the upper end of the reinforcing plate 38, whereas the upper mounting member 112 is the lower end of the extension portion 110 of the reinforcing plate 106. Since it is joined to, it is joined below the upper end of the reinforcing plate 106. The upper mounting member 112 has the same configuration as the lower mounting member 40 shown in FIG. 4, and is composed of a mounting portion 112A and a joint portion 112B. The mounting portion 112A is the upper flange 114A of the beam 114. It is fastened and fixed to the upper surface at two points. However, while the lower mounting member 40 on the second floor is a "lower mounting member" joined to the lower end of the base 38A of the reinforcing plate 38, the upper mounting member 112 is joined near the upper end of the reinforcing plate 106. The difference is that it is an "upper mounting member".

FIG. 10 shows a state in which the reinforcing plate 120 of the outer wall fixing structure 34 according to the present embodiment is used as a fixing base for the chamber door frame 122. Here, the chamber door 124 rotatably fixed to the chamber door frame 122 is, for example, the door of the gas meter box 126. The ALC outer wall panel 128 is fixed to a foundation and a beam (not shown) by a foundation side mounting member 72 (not shown) and an upper mounting member 42, respectively. The reinforcing plate 120 is composed of a base portion 120A and a bent portion 120B, and the bent portion 120B is extended from the bent portion 38B shown in FIG. 6 and is wider than the bent portion 38B. The mounting bracket 130 previously joined to the chamber door frame 122 is abutted against the bent portion 120B of the reinforcing plate 120, and the screw 132 inserted from the side of the chamber door frame 122 is inserted into the mounting bracket 130 (not shown) and bent. The chamber door frame 122 is fixed to the ALC outer wall panel 128 via the reinforcing plate 120 by penetrating the portion 120B and being screwed into the ALC outer wall panel 128 from the side surface.

(Action / effect)
Next, the operation and effect of this embodiment will be described.

First, by processing the ALC outer wall panel 50 having a reference width, a narrow ALC outer wall panel 22 without anchors 52 and 54 can be obtained. The widthwise end of the reinforcing plate 38 is bent substantially vertically, and the bent portion 38B is formed in advance. An upper mounting member 42 is preliminarily joined to the upper end of the back surface of the back surface of the base 38A of the reinforcing plate 38 used for the first floor portion, and a foundation side mounting member 72 is preliminarily joined to the lower end by welding.

Next, the reinforcing plate 38 is fixed to the ALC outer wall panel 22. Specifically, by bringing the bent portion 38B into contact with the side surface 22C of the narrow ALC outer wall panel 22, the reinforcing plate 38 is positioned in the width direction with respect to the ALC outer wall panel 22, and the lower end of the reinforcing plate 38 is positioned. It is positioned in the vertical direction so as to match the lower end of the ALC outer wall panel 22, and the reinforcing plate 38 is temporarily fixed to the ALC outer wall panel 22 with an adhesive. In this state, a plurality of screws 36 are inserted from the design surface 22A side of the ALC outer wall panel 22, penetrate the ALC outer wall panel 22, and penetrate the central portion of the base 38A of the reinforcing plate 38 in the width direction, so that the reinforcing plate 38 is inserted. It is fixed to the ALC outer wall panel 22.

After that, at the construction site, the upper mounting member 42 and the foundation side mounting member 72 provided on the reinforcing plate 38 are mounted on the beam 44 and the foundation 60 constructed in advance, respectively. Specifically, the mounting portion 42A of the upper mounting member 42 is in contact with the lower surface of the lower flange 44B of the beam 44, and the two mounting holes 48 of the mounting portion 42A are the two through holes 46 on the outdoor side of the lower flange 44B. In the coaxially arranged state, the bolt 76 inserted from above (from the side of the lower flange 44B) is screwed into the nut 78, and the upper mounting member 42 is mounted on the beam 44. Further, the insertion hole 74 provided in the bottom wall portion 72A of the foundation side mounting member 72 is arranged coaxially with the female screw portion 68 formed in the column base plate 62 fixed to the foundation 60, and is inserted from above. The male screw 70 is screwed in, and the foundation side mounting member 72 is attached to the foundation 60 via the column base plate 62.

In the narrow ALC outer wall panel 22 used for the second floor, the upper mounting member 42 is welded to the upper end of the back surface of the base 38A of the reinforcing plate 38, and the lower mounting member 40 or the hook metal fitting 90 is welded to the lower end. Pre-welded. When the lower mounting member 40 is used at the lower end, it is bolted to the upper flange 44A of the beam 44 at the construction site. When the hook metal fitting 90 is used at the lower end, the guide portion 90D is hooked on the upper end of the rising portion 88B of the waterproof base material 88 to form the second vertical wall portion 90C and the back surface of the base portion 38A of the reinforcing plate 38. The reinforcing plate 38 is fixed to the waterproof base material 88 by sandwiching the rising portion 88B of the waterproof base material 88 between the two.

As described above, in the present embodiment, the reinforcing plate 38 screw-fixed to the back surface 22B of the ALC outer wall panel 22 having no anchor and narrower than the reference width comes into contact with the ALC outer wall panel 22 and the lower end of the ALC outer wall panel 22. Since it extends from the top to the vicinity of the upper end, the narrow ALC outer wall panel 22 is reinforced. An upper mounting member 42 is welded to the upper end of the back surface of the base 38A of the reinforcing plate 38, and a foundation side mounting member 72 (lower mounting member 40 or hook metal fitting 90 in the case of the second floor portion) is welded to the lower end. Pre-welded with. Then, the upper mounting member 42 and the foundation side mounting member 72 are mounted on the beam 44 and the foundation 60, respectively, and as a result, the ALC outer wall panel is fixed to the beam 44 and the foundation 60. The upper mounting member 42 and the foundation side mounting member 72 are provided on the reinforcing plate 38, and by adopting a configuration in which the reinforcing plate and the mounting member are not directly fixed to the ALC outer wall panel 22, the reinforcing plate and the mounting member are fixed to the ALC outer wall panel. Further, the ALC outer wall panel 22 without an anchor can be fixed to the beam 44 and the foundation 60 with a simple configuration using a small number of members as compared with the case of fixing to the building frame with mounting members.

Further, in the present embodiment, since the screw 36 is inserted from the design surface (22A) side of the ALC outer wall panel 22 in order to fix the reinforcing plate 38 to the back surface 22B of the ALC outer wall panel 22, the head of the screw 36 is inserted. All you have to do is fill a small dent with a diameter (for example, about 10 mm in diameter) with putty, and you need to do the counterbore work required when embedding bolts, nuts, washers, etc. in the ALC outer wall panel, and repair the counterbore part. No need to reconstruct the design.

Further, in the present embodiment, even in a configuration in which it is difficult to directly fix the mounting member of the reinforcing plate 38 to the beam 44 or the foundation 60, the column base plate 62 used for fixing other building members and the waterproof base material. Since it is fixed via 88, the narrow ALC outer wall panel 22 without anchors can be fixed to the beam 44 or foundation 60 with a simple configuration with a small number of members without the need for additional members.

Further, the reinforcing plate 38 is provided with a bent portion 38B that is bent along the side surface of the ALC outer wall panel, and when the reinforcing plate 38 is fixed to the ALC outer wall panel 22, the bent portion 38B is narrowed. By abutting on the side surface 22C of the ALC outer wall panel 22, the reinforcing plate 38 can be positioned in the width direction with respect to the ALC outer wall panel 22. Further, since the reinforcing plate 38 is provided with the bent portion 38B, the rigidity of the reinforcing plate 38 is increased, and the bending and twisting of the reinforcing plate 38 in contact with the back surface 22B of the ALC outer wall panel 22 is suppressed. As a result, damage to the ALC outer wall panel 22 can be suppressed or prevented.

Further, the upper mounting member 42 and the lower mounting member 40 are provided with two mounting holes 48 so as to be fastened and fixed to the lower flange 44B and the upper flange 44A at two points, respectively. Further, at least two hook metal fittings 90 for attaching to the waterproof base material 88 are provided, and are fixed to the waterproof base material at two points. As described above, at least one of the upper and lower parts of the mounting member provided on the upper part and the lower part of the reinforcing plate 38 is fixed to the beam 44 or another member at at least two points, so that the case is fixed at one point. In comparison, the rotation of the reinforcing plate can be suppressed or prevented, and as a result, the fixing of the ALC outer wall panel 22 can be further strengthened.

Further, since the bent portion 120B of the reinforcing plate 120 can be used as a fixing base for the chamber door frame 122, an additional fixing base for fixing the chamber door frame 122 is not required, and one of the ALC outer wall fixing structures 34. The number of members can be reduced by effectively utilizing the parts for other purposes.

10 Building 22 Narrow ALC outer wall panel 34 Outer wall fixing structure 36 Screw 38 Reinforcing plate 38B Bent part 40 Lower mounting member (lower mounting member)
42 Upper mounting member (upper mounting member)
44 Beam 60 Foundation 62 Column base plate (other members)
72 Foundation mounting member (lower mounting member)
88 Waterproof base material (other materials)
90 Hook bracket (lower mounting member)
100 Narrow ALC outer wall panel 106 Reinforcing plate 108B Bending part 110B Bending part 112 Upper mounting member (upper mounting member)
114 Beam 120 Reinforcing plate 120B Bent part 122 Chamber door frame (other building materials)
128 Narrow ALC outer wall panel

Claims (7)

An ALC outer wall panel that does not have an anchor, is narrower than the reference width , and is formed in a straight line with no bends in a plan view.
It is fixed to the back surface of the ALC outer wall panel by a screw penetrating the ALC outer wall panel from the design surface side of the ALC outer wall panel, abuts on the back surface of the ALC outer wall panel, and extends from the lower end to the vicinity of the upper end of the ALC outer wall panel. Reinforcing plates that are extended and provided with upper and lower mounting members on the top and bottom that can be mounted directly on the beam or foundation or via other members, respectively.
The outer wall fixing structure is equipped with. The upper mounting member is configured to be directly mountable on the beam.
The outer wall fixing structure according to claim 1, wherein the lower mounting member is fixed to the foundation and can be mounted to the foundation via a column base plate to which the lower end of the column is connected. The outer wall fixing structure according to claim 1, wherein the upper mounting member and the lower mounting member are configured to be directly mountable to the beam. The upper mounting member is configured to be directly mountable on the beam.
The outer wall fixing structure according to claim 1, wherein the lower mounting member is configured to be mountable to the beam via a waterproof base material fixed to the beam. The outer wall fixing structure according to any one of claims 1 to 4, wherein the reinforcing plate includes a bent portion that is bent substantially vertically from the back surface of the ALC outer wall panel along the side surface of the ALC outer wall panel. The upper mounting member and the lower mounting member are fixed to the reinforcing plate by welding, and at least one of the upper mounting member and the lower mounting member is fixed to the beam or the foundation at at least two points. , The outer wall fixing structure according to any one of claims 1 to 5. The outer wall fixing structure according to claim 5, wherein another building member is fixed to the bent portion.

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