Construction method of exterior building material support structure

Abstract

To provide a construction method for an exterior building material support structure that can provide an exterior building material support structure with ensured waterproofness in a small number of construction man-hours. 【Solution means】A construction method for an exterior building material support structure that supports an exterior building material partitioning between the inside and outside of a building includes a waterproof sealant installation step of installing a waterproof sealant along the width direction of the exterior building material on a support concrete, and an angle member including a first plate portion for supporting the exterior building material and a second plate portion extending so as to intersect the first plate portion, and an angle member installation step of installing the angle member along the width direction so as to sandwich a waterproof sealant between the first plate portion and the support concrete, an angle member fixing step of fixing the first plate portion of the angle member to the support concrete, and an exterior building material assembling step of assembling the exterior building material to the angle member so that the outdoor side surface of the second plate portion and the indoor side surface of the exterior building material face each other.

Description

Technical Field

[0001] The present disclosure relates to a construction method of an exterior building material support structure.

Background Art

[0002] Conventionally, an exterior building material support structure for supporting exterior building materials that partition the inside and outside of a building is known. The exterior building material support structure supports the exterior building materials at a desired height from the upper surface of the supporting concrete and prevents water derived from rain or the like from entering the room from below the exterior building materials.

[0003] For example, Patent Document 1 describes a rising portion that is provided separately on the floor surface and is arranged so as to close a gap between an outer wall material or a sash and the floor surface. A calcium silicate board, a plywood, or the like is adopted for the rising portion. By installing a covering member or the like on the rising portion, a waterproof structure that prevents water from entering the room from below the outer wall or the sash is realized.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in Patent Document 1, in order to realize the waterproof structure, after installing the rising portion (calcium silicate board, plywood, etc.), a covering member, a joiner, a waterproof sheet, etc. are installed, so the construction man-hours for realizing the waterproof structure increase. When the construction man-hours increase, there is a risk that the construction period of the building will be prolonged.

[0006] In view of the above circumstances, at least some embodiments of the present invention aim to provide a construction method that can provide an exterior building material support structure with ensured waterproofness with fewer construction man-hours.

Means for Solving the Problem

[0007] The construction method of the exterior building material support structure according to at least some embodiments of the present invention is a construction method of an exterior building material support structure for supporting an exterior building material that partitions the inside and outside of a building, a waterproof sealant installation step of installing a waterproof sealant along the width direction of the exterior building material on the support concrete, an angle member including a first plate portion for supporting an exterior building material and a second plate portion extending so as to intersect the first plate portion, and an angle member installation step of installing the angle member along the width direction so as to sandwich a waterproof sealant between the first plate portion and the support concrete, an angle member fixing step of fixing the first plate portion of the angle member to the support concrete, an exterior building material assembly step of assembling the exterior building material to the angle member so that the outdoor side surface of the second plate portion faces the indoor side surface of the exterior building material, and comprises.

Advantages of the Invention

[0008] In at least some embodiments of the present invention, an exterior building material support structure with ensured waterproofness can be provided with a small number of construction man-hours.

Brief Description of the Drawings

[0009]

Figure 1

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MODE FOR CARRYING OUT THE INVENTION

[0010] Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples.

[0011] First, with reference to FIGS. 1 to 3, the configuration of an exterior building material support structure according to some embodiments will be described. Hereinafter, the exterior building material support structure may be abbreviated as "support structure". FIG. 1 is a cross-sectional view of an exterior building material support structure in the width direction of an exterior building material according to an embodiment. Figure 2 is a schematic diagram showing the state of the waterproof sealing material before and after deformation according to an embodiment. Note that the general shape of the waterproof sealing material before deformation is drawn with a two-dot chain line, and the general shape of the waterproof sealing material after deformation is drawn with a solid line. Figure 3 is a cross-sectional view of an exterior building material support structure according to an embodiment, and is a cross-sectional view of the exterior building material support structure shown in Figure 1 cut along line A-A.

[0012] The exterior building material support structure 1 is for supporting an exterior building material 2 that partitions the inside and outside of a building 9. The exterior building material 2 includes an outdoor side surface 2a facing the outside of the building 9 and an indoor side surface 2b facing the inside of the building 9 as shown in Figure 1. In the embodiment shown in Figure 1, the exterior building material 2 is a lightweight cellular concrete building material (ALC). In other embodiments not shown, the exterior building material 2 may be, for example, a sash or an extruded cement board (ECP).

[0013] In some embodiments, as shown in Figures 1 and 3, the exterior building material support structure 1 includes a support concrete 3, and an angle member 4 and a waterproof sealing material 5 that extend along the width direction X2 of the exterior building material 2 on the support concrete 3. The waterproof sealing material 5 is installed in a state of being sandwiched between the upper surface 31 of the support concrete 3 and the lower surface (the lower surface 42c of the first plate portion 42 described later) of the angle member 4 in the height direction X1 of the exterior building material 2. Note that the support concrete 3 may be, for example, a slab concrete that constitutes the building 9 or a beam concrete.

[0014] As shown in Figure 1, the angle member 4 includes a first plate portion 42 that extends along the thickness direction X3 of the exterior building material 2 and a second plate portion 44 that extends along the indoor side surface 2b of the exterior building material 2. The second plate portion 44 is connected to the first plate portion 42 and extends along the height direction X1.

[0015] As shown in FIG. 1, the first plate portion 42 includes an outdoor-side end portion 42A on the outdoor side in the thickness direction X3 and an indoor-side end portion 42B on the indoor side in the thickness direction X3. In the embodiment shown in FIG. 1, the first plate portion 42 is connected to the second plate portion 44 at the indoor-side end portion 42B. That is, the angle member 4 has an L-shaped cross-sectional shape when viewed from the width direction X2. Thus, the angle member 4 may be, for example, an equal-leg angle steel or an unequal-leg angle steel. In other embodiments (not shown), the first plate portion 42 may be connected to the second plate portion 44 at a position between the outdoor-side end portion 42A and the indoor-side end portion 42B in the thickness direction X3. That is, the angle member 4 may have a T-shaped cross-sectional shape when viewed from the width direction X2.

[0016] In some embodiments, the outdoor-side end portion 42A of the first plate portion 42 has an end face 42a in the thickness direction X3. The end face 42a of the first plate portion 42 is located on the indoor side of the outdoor-side side face 2a of the exterior building material 2 and on the outdoor side of the indoor-side side face 2b when viewed from the height direction X1. In the embodiment shown in FIG. 1, when the position of the indoor-side side face 2b of the exterior building material 2 in the thickness direction X3 is set to 0% and the position of the outdoor-side side face 2a is set to 100%, the end face 42a of the first plate portion 42 is located at a thickness-direction position of 40% to 60%. In other embodiments (not shown), the end face 42a of the first plate portion 42 may be located at the same position as the outdoor-side side face 2a of the exterior building material 2 in the thickness direction X3.

[0017] At least a part of the first plate portion 42 is located between the upper surface 31 of the support concrete 3 and the lower surface 2c of the exterior building material 2 in the height direction X1 as described above. Therefore, the first plate portion 42 transmits the load received from the exterior building material 2 located above the first plate portion 42 to the support concrete 3 via the waterproof sealant 5. That is, the first plate portion 42 supports the exterior building material 2 in the height direction X1.

[0018] In the embodiments shown in FIGS. 1 and 3, the first plate portion 42 supports the exterior building material 2 via the filling material 7. That is, the filling material 7 is located between the first plate portion 42 and the lower surface 2c of the exterior building material 2 in the height direction X1. In the embodiments illustrated in FIGS. 1 and 3, the filling material 7 is a refractory material. The type of the refractory material is not particularly limited, and for example, it may be rock wool. In other embodiments (not shown), the first plate portion 42 directly supports the exterior building material 2. That is, the first plate portion 42 is arranged so as to be in direct contact with the lower surface 2c of the exterior building material 2.

[0019] The waterproof sealant 5 installed on the upper surface 31 of the support concrete 3 is installed in a state of being sandwiched between the upper surface 31 of the support concrete 3 and the lower surface 42c of the first plate portion 42 as shown in FIGS. 1 to 3. That is, the waterproof sealant 5 is installed in a deformed state under the load in the height direction X1 from the first plate portion 42. More specifically, as shown in FIG. 2, the waterproof sealant 5 viewed from the width direction X2 has a cross-sectional shape as illustrated by the two-dot chain line before the first plate portion 42 is installed. Thereafter, when the first plate portion 42 is installed, the cross-sectional shape of the waterproof sealant 5 deforms so that the height decreases and it spreads in the thickness direction X3 as shown by the solid line in FIG. 2. The waterproof sealant 5 is not particularly limited, and for example, it may be butyl rubber.

[0020] According to the above-described configuration, it is possible to prevent water from entering the room from between the upper surface 31 of the support concrete 3 and the lower surface 42c of the first plate portion 42 of the angle member 4. Therefore, it is possible to effectively prevent water from entering the room from the outside.

[0021] In the embodiments shown in FIGS. 1 to 3, the lower surface 42c of the first plate portion 42 is a flat surface extending along the upper surface 31 of the support concrete 3. In other embodiments (not shown), a recess may be provided on the lower surface 42c of the first plate portion 42. At this time, the depth of the recess on the lower surface 42c is shallower than the height of the waterproof sealant 5. By installing the first plate portion 42 so that the waterproof sealant 5 is received in the recess on the lower surface 42c, the waterproof sealant 5 is sandwiched between the support concrete 3 and the first plate portion 42, and the positioning of the first plate portion 42 in the thickness direction X3 can be easily performed.

[0022] In the embodiment shown in FIG. 1, the first plate portion 42 of the angle member 4 is fixed to the support concrete 3 by the anchor 8. The shaft portion 82 of the anchor 8 penetrates the first plate portion 42 along the height direction X1 and is fixed in the hole 33 provided in the support concrete 3 or in the hole 33 formed by driving the shaft portion 82 into the support concrete 3. The head portion 84 of the anchor 8 abuts against the upper surface 42d of the first plate portion 42 and fixes the first plate portion 42 in the height direction X1. Note that the type of the anchor 8 is not particularly limited, and it may be a metal-based anchor or an adhesive anchor.

[0023] According to the above configuration, the waterproof sealant 5 is more reliably sandwiched between the upper surface 31 of the support concrete 3 and the lower surface 42c of the first plate portion 42, so that the waterproof performance between the support concrete 3 and the first plate portion 42 can be improved.

[0024] In the embodiment shown in FIG. 1, the waterproof sealant 5 is located on the outdoor side of the anchor 8. That is, the indoor-side end surface 5b of the waterproof sealant 5 in the thickness direction X3 is located on the outdoor side of the anchor 8 in the thickness direction X3.

[0025] According to the above configuration, it becomes difficult for the water that has entered between the support concrete 3 and the first plate portion 42 to reach the anchor 8. Therefore, the deterioration of the anchor 8 can be prevented, and the durability of the support structure 1 can be improved.

[0026] In the embodiment shown in FIG. 3, the waterproof sealant 5 includes a first portion 52 extending along the width direction X2 and a second portion 56 rising from an end portion 54 of the first portion 52 in the width direction X2.

[0027] As described above, the first part 52 is installed in a state of being sandwiched between the upper surface 31 of the support concrete 3 and the lower surface 42c of the first plate portion 42.

[0028] As shown in FIG. 3, the second part 56 extends along the side surface 202 of the structure 200 adjacent to the support structure 1. That is, the second part 56 extends along the height direction X1. Note that the structure 200 is not particularly limited and may be, for example, an outer wall or a column of the building 9.

[0029] According to the above configuration, even if water accumulates outside the building 9, it is possible to more effectively prevent water from entering from the outside to the inside. Therefore, the waterproof property of the support structure 1 can be further improved.

[0030] In the embodiment shown in FIG. 3, the end portion 54 of the first part 52 abuts against the side surface 202 of the structure 200 adjacent to the exterior building material support structure 1. Further, at least a part of the second part 56 is located between the first plate portion 42 of the angle member 4 and the side surface 202 of the structure 200 in the width direction X2.

[0031] As shown in FIG. 3, it is preferable that the height h of the second part 56 satisfies the condition of 0.25 ≦ h / H ≦ 1 when the distance between the lower surface 2c of the exterior building material 2 and the upper surface 31 of the support concrete 3 is H. By the second part 56 satisfying the above conditions, even if water accumulates outside the building 9, it is possible to more reliably prevent water from entering from the outside to the inside.

[0032] In the embodiment shown in FIG. 1, the exterior building material support structure 1 may include a plate member 102 and bolts 104 for fixing the plate member 102 to the indoor side surface 2b of the exterior building material 2. The plate member 102 is configured to sandwich the upper end portion 44D of the second plate portion 44 located above the height position of the lower surface 2c of the exterior building material 2 between the plate member 102 and the exterior building material 2 in the thickness direction X3. Therefore, the exterior building material 2 is fixed in the thickness direction X3.

[0033] Next, with reference to FIGS. 1, 4, and 5, a further configuration of the exterior building material support structure according to some embodiments will be described. FIG. 4 is a view showing an embodiment in region B shown in FIG. 1, and is a partially enlarged view of a cross-sectional view of the exterior building material support structure. FIG. 5 is a view showing another embodiment in region B shown in FIG. 1, and is a partially enlarged view of a cross-sectional view of the exterior building material support structure.

[0034] In some embodiments, the exterior building material support structure 1 (1A, 1B) further includes at least one waterproof seal 20 (22, 24) installed on the outdoor side of the angle member 4, as shown in FIGS. 1, 4, and 5. That is, the indoor side surface 20b (22b, 24b) of the waterproof seal 20 (22, 24) is located on the outdoor side of the end surface 42a of the first plate portion 42. Further, the waterproof seal 20 (22, 24) extends along the width direction X2 between the support concrete 3 and the exterior building material 2. Note that the waterproof seal 20 (22, 24) is not particularly limited and may be polyurethane or silicone.

[0035] According to the above configuration, it becomes difficult for water to enter between the support concrete 3 and the first plate portion 42. Therefore, the waterproof property of the exterior building material support structure 1 (1A, 1B) can be further enhanced.

[0036] In the embodiments shown in FIGS. 1, 4, and 5, the indoor side surface 22b (20b) of the waterproof seal 22 (20) is in contact with the end surface 42a of the first plate portion 42. Therefore, even if water intrudes from between the exterior building material 2 and the waterproof seal 20, it becomes difficult for water to intrude between the angle member 4 and the support concrete 3. Further, the indoor side surface 22b (20b) of the waterproof seal 22 (20) may be in contact with the end surface 5a of the waterproof seal material 5.

[0037] In the embodiments shown in FIGS. 1, 4, and 5, the lower surface 20c (22c, 24c) of the waterproof seal 20 (22, 24) is adhered to the upper surface 31 of the supporting concrete 3. Similarly, the upper surface 20d (22d, 24d) of the waterproof seal 20 (22, 24) is adhered to the lower surface 2c of the exterior building material 2. Therefore, it is difficult for water to enter between the supporting concrete 3 and the first plate portion 42.

[0038] In the embodiments shown in FIGS. 1, 4, and 5, the waterproof seal 20 includes a pair of waterproof seals 22 and 24 arranged side by side in the thickness direction X3. That is, one waterproof seal 22 and the other waterproof seal 24 are separate from each other and are arranged side by side in the thickness direction X3. One waterproof seal 22 is installed between the end face 42a of the first plate portion 42 and the indoor side surface 24b of the other waterproof seal 24 in the thickness direction X3. That is, the other waterproof seal 24 is installed outside the outdoor side surface 22a of one waterproof seal 22. Further, one waterproof seal 22 and the other waterproof seal 24 may be arranged in contact with each other or separated from each other in the thickness direction X3. Note that the pair of waterproof seals 22 and 24 may be made of the same material as each other or different materials from each other.

[0039] According to the above configuration, when lateral shaking such as an earthquake occurs, the possibility that the waterproof seals 22 and 24 pull on each other and break can be reduced. Therefore, the durability of the exterior building material support structure 1 (1A, 1B) can be enhanced.

[0040] In an embodiment not shown, the pair of waterproof seals 22 and 24 are arranged so as not to adhere to each other. That is, the pair of waterproof seals 22 and 24 are not adhered by an adhesive or the like.

[0041] In the embodiments shown in FIGS. 1 and 4, a pair of waterproof seals 22 and 24 are arranged such that one waterproof seal 22 is spaced apart from the other waterproof seal 24. That is, the outdoor side surface 22a of one waterproof seal 22 and the indoor side surface 24b of the other waterproof seal 24 are arranged with a distance X therebetween in the thickness direction X3. At this time, a gap G is formed between the pair of waterproof seals 22 and 24.

[0042] According to the above configuration, when lateral shaking such as an earthquake occurs, the possibility that the waterproof seals 22 and 24 rub against each other and are damaged can be reduced. Therefore, the durability of the exterior building material support structure 1(1A) can be further enhanced.

[0043] Note that the distance X between the outdoor side surface 22a of one waterproof seal 22 and the indoor side surface 24b of the other waterproof seal 24 is preferably 10 mm or less. If the distance X is too large, the gap G may become a place where water accumulates. The water accumulated in the gap G may cause mold growth and deterioration of the surrounding members. Therefore, by setting the distance X to 10 mm or less, the possibility of mold growth and deterioration of the surrounding members can be suppressed.

[0044] In the embodiment shown in FIG. 5, the exterior building material support structure 1B further includes a backup material 30 installed between the pair of waterproof seals 22 and 24. That is, the backup material 30 is installed between the outdoor side surface 22a of one waterproof seal 22 and the indoor side surface 24b of the other waterproof seal 24.

[0045] According to the above configuration, when lateral shaking such as an earthquake occurs, the possibility that the waterproof seals 22 and 24 rub against each other and are damaged can be reduced. Therefore, the durability of the exterior building material support structure 1(1B) can be further enhanced.

[0046] In the embodiment shown in FIG. 5, the backup material 30 is made of a material that is difficult to adhere to both of the pair of waterproof seals 22 and 24. Therefore, the outdoor side surface 30a of the backup material 30 and the indoor side surface 24b of the waterproof seal 24 are not adhered to each other. Similarly, the indoor side surface 30b of the backup material 30 and the outdoor side surface 22a of the waterproof seal 22 are not adhered to each other. Therefore, when lateral shaking such as an earthquake occurs, the waterproof seals 22 and 24 can be pulled against each other through the backup material 30, reducing the possibility that the waterproof seals 22 and 24 break. The material of the backup material 30 is not particularly limited, and for example, it may be polyethylene. Note that the backup material 30 may be a sponge in which air bubbles are formed inside the backup material 30. Since the sponge as the backup material 30 has cushioning properties, the compressed backup material 30 can be installed between the upper surface 31 of the support concrete 3 and the lower surface 2c of the exterior building material 2. At this time, since the restoring force of the backup material 30 acts on the support concrete 3 and the exterior building material 2 along the height direction X1, the backup material 30 can be easily fixed.

[0047] In some embodiments, as shown in FIGS. 1, 4, and 5, the exterior building material support structure 1 (1A, 1B) further includes a waterproof film 60 that extends along the height direction X1 of the exterior building material 2 from the upper surface 31 of the support concrete 3 on the outdoor side. The waterproof film 60 includes a vertical attachment portion 62 that is attached to the outdoor side surface 2a of the exterior building material 2.

[0048] According to the above configuration, the gap between the exterior building material 2 and the support concrete 3 can be closed. Therefore, the waterproof property of the exterior building material support structure 1 (1A, 1B) can be further enhanced.

[0049] In the embodiments shown in FIGS. 1, 4, and 5, the vertical attachment portion 62 has a first surface 62b that faces the outdoor side surface 2a of the exterior building material 2, and is attached to the outdoor side surface 2a of the exterior building material 2 on the first surface 62b.

[0050] In the embodiments shown in FIGS. 1, 4, and 5, the vertical attachment portion 62 is located below the first surface 62b and further includes a second surface 62c facing the waterproof seal 24 (20). The vertical attachment portion 62 is attached to the outdoor side surface 24a (20a) of the waterproof seal 24 (20) at the second surface 62c. Since the vertical attachment portion 62 is attached to the exterior building material 2 and the waterproof seal 24 (20), it is possible to more effectively prevent water from entering between the exterior building material 2 and the waterproof seal 24 (20), as well as between the waterproof seal 24 (20) and the support concrete 3.

[0051] In some embodiments, as shown in FIGS. 1, 4, and 5, the waterproof membrane 60 further includes a horizontal attachment portion 64 that extends outward from the lower end 62C of the vertical attachment portion 62 and is attached to the upper surface 31 of the support concrete 3.

[0052] According to the above configuration, it is possible to more effectively prevent water from entering along the upper surface 31 of the support concrete 3. Therefore, the waterproof performance of the exterior building material support structure 1 (1A, 1B) can be further improved.

[0053] Note that the waterproof membrane 60 may be a sheet-like sealing material or a membrane formed by solidifying a liquid waterproof agent. Further, since the waterproof membrane 60 is exposed to sunlight and rainfall, high waterproof performance and weather resistance are required. Therefore, the waterproof membrane 60 is preferably, for example, a urethane-based coating film.

[0054] Subsequently, with reference to FIGS. 6 to 12, a construction method of an exterior building material support structure according to some embodiments for constructing the above-described exterior building material support structure 1 will be described. FIG. 6 is a flowchart for explaining a construction method of an exterior building material support structure according to an embodiment. FIG. 7 is a flowchart for explaining sub-steps included in the waterproof seal installation step in the flowchart shown in FIG. 6. FIG. 8 is a schematic cross-sectional view showing an angle member installation step in a construction method of an exterior building material support structure according to an embodiment. FIG. 9 is a schematic cross-sectional view of a structure obtained by the procedure up to the exterior building material assembly step in the construction method of the exterior building material support structure according to one embodiment. FIG. 10 is a schematic cross-sectional view for explaining the waterproof seal installation step in the construction method of the exterior building material support structure according to one embodiment. FIG. 11 is a schematic cross-sectional view for explaining the waterproof seal installation step in the construction method of the exterior building material according to another embodiment. FIG. 12 is a schematic cross-sectional view of a structure obtained after the waterproof seal installation step in the construction method of the exterior building material support structure according to one embodiment.

[0055] In some embodiments, as shown in FIG. 6, the construction method of the exterior building material support structure 1 includes a waterproof sealant installation step S10, an angle member installation step S20, an angle member fixing step S30, and an exterior building material assembly step S40.

[0056] In the waterproof sealant installation step S10, as shown in FIG. 8, the waterproof sealant 5 is installed on the support concrete 3 along the width direction X2 of the exterior building material 2. Specifically, the waterproof sealant 5 is installed on the upper surface 31 of the support concrete 3.

[0057] In some embodiments, after applying a paste-like sealant to the upper surface 31 of the support concrete 3 and curing it, the sealant may be installed as the waterproof sealant 5. Therefore, the waterproof sealant 5 can be easily installed. In other embodiments, the waterproof sealant 5 may be installed by attaching a solid sealant to the upper surface 31 of the support concrete 3 along the width direction X2 of the exterior building material 2 on the support concrete 3. By using a solid sealant, a sealant processed into a desired shape can be prepared in advance as the waterproof sealant 5.

[0058] After installing the waterproof sealant 5 on the support concrete 3, the angle member installation step S20 is performed. In the angle member installation step S20, as shown in FIG. 8, the angle member 4 is installed along the width direction X2 of the exterior building material 2 so as to sandwich the waterproof sealant 5 between the first plate portion 42 of the angle member 4 and the support concrete 3. That is, in the angle member installation step S20, the first plate portion 42 of the angle member 4 is pressed against the waterproof sealant 5 from above the waterproof sealant 5, and the angle member 4 is installed so as to sandwich the waterproof sealant 5 between the lower surface 42c of the first plate portion 42 and the upper surface 31 of the support concrete 3. The angle member 4 includes a first plate portion 42 for supporting the exterior building material 2 and a second plate portion 44 extending so as to intersect the first plate portion 42. After the angle member installation step S20, as described above, the first plate portion 42 extends along the thickness direction X3 of the exterior building material 2, and the second plate portion 44 extends along the height direction X1 of the exterior building material 2.

[0059] After installing the angle member 4, an angle member fixing step S30 is performed. In the angle member fixing step S30, the first plate portion 42 of the angle member 4 is fixed to the support concrete 3. The method of fixing the first plate portion 42 of the angle member 4 to the support concrete 3 is not particularly limited. For example, as shown in FIG. 9, it may be fixed using an anchor 8, or it may be fixed by welding the base plate pre-fixed to the support concrete 3 and the first plate portion 42.

[0060] After fixing the angle member 4 to the support concrete 3, an exterior building material assembling step S40 is performed. In the exterior building material assembling step S40, as shown in FIG. 9, the exterior building material 2 is assembled to the angle member 4 so that the outdoor side surface 44a of the second plate portion 44 of the angle member 4 and the indoor side surface 2b of the exterior building material 2 face each other.

[0061] In the embodiment shown in FIG. 9, in the exterior building material assembly step S40, the exterior building material 2 is assembled to the angle member 4 using the plate member 102 and the bolt 104 for fixing the plate member 102 to the indoor side surface 2b of the exterior building material 2. Specifically, the exterior building material 2 is assembled to the angle member 4 by sandwiching the upper end portion 44D of the second plate portion 44 of the angle member 4 between the indoor side surface 2b of the exterior building material 2 and the outdoor side surface 102a of the plate member 102 fixed to the exterior building material 2 by the bolt 104.

[0062] In one embodiment, the exterior building material 2 is assembled to the angle member 4 such that the upper end portion 44D of the second plate portion 44 of the angle member 4 is inserted between the indoor side surface 2b of the exterior building material 2 and the outdoor side surface 102a of the plate member 102. At this time, the upper end portion 44D of the second plate portion 44 may be inserted between the indoor side surface 2b of the exterior building material 2 and the outdoor side surface 102a of the plate member 102 along the height direction X1 of the exterior building material 2. Similarly, the upper end portion 44D of the second plate portion 44 may be inserted between the indoor side surface 2b of the exterior building material 2 and the outdoor side surface 102a of the plate member 102 along the width direction X2 of the exterior building material 2.

[0063] In another embodiment, with the exterior building material 2 held such that the indoor side surface 2b of the exterior building material 2 faces the outdoor side surface 44a of the second plate portion 44 of the angle member 4, the plate member 102 is fixed to the outdoor side surface 2a of the exterior building material 2 by the bolt 104. When the plate member 102 is fixed to the indoor side surface 2b of the exterior building material 2, the upper end portion 44D of the second plate portion 44 is sandwiched between the indoor side surface 2b of the exterior building material 2 and the outdoor side surface 102a of the plate member 102.

[0064] In other embodiments (not shown), when assembling the exterior building material 2 to the angle member 4, methods other than using the plate member 102 and the bolt 104 may be used. The method of assembling the exterior building material 2 to the angle member 4 is not particularly limited. For example, the second plate portion 44 of the angle member 4 may be fixed to the exterior building material 2 by bolts, or the outdoor side surface 44a of the second plate portion 44 and the indoor side surface 2b of the exterior building material 2 may be fixed by welding or an adhesive.

[0065] According to the above construction method, the angle member 4 is installed along the width direction X2 of the exterior building material 2 so that the waterproof sealant 5 is sandwiched between the angle member 4 for supporting the exterior building material 2 and the support concrete 3. Then, the first plate portion 42 of the angle member 4 is fixed to the support concrete 3. And the exterior building material 2 is assembled to the angle member 4 so that the outdoor side surface 44a of the second plate portion 44 of the angle member 4 faces the indoor side surface 2b of the exterior building material 2, so that the support structure 1 with ensured waterproofness can be provided with a small number of construction man-hours.

[0066] In some embodiments, the waterproof sealant installation step S10 includes a first portion installation step for installing the first portion 52 of the above-described waterproof sealant 5 and a second portion installation step for installing the second portion 56 of the above-described waterproof sealant 5. The first portion installation step is a step of installing the first portion 52 of the waterproof sealant 5 along the width direction X2 of the exterior building material 2 on the support concrete 3. The second portion installation step is a step of rising from the end portion 54 of the first portion 52 in the width direction X2 of the exterior building material 2 and installing the second portion 56 of the waterproof sealant 5 along the side surface 202 of the adjacent structure 200. Specifically, as shown in FIG. 3, after installing the waterproof sealant 5 along the width direction X2 of the exterior building material 2 up to the side surface 202 of the structure 200 on the upper surface 31 of the support concrete 3, the waterproof sealant 5 is installed on the side surface 202 up to the position of the height h. Alternatively, after installing the waterproof sealant 5 from the position of the height h to the upper surface 31 of the support concrete 3 on the side surface 202 of the structure 200, the waterproof sealant 5 may be installed along the width direction X2 of the exterior building material 2 on the upper surface 31. As described above, since the waterproof sealant 5 (second portion 56) is installed up to the position of the height h on the side surface 202 of the structure 200, even if water accumulates outdoors in the building 9, water intrusion from the outdoors to the indoors can be prevented.

[0067] In addition, when the paste-like sealing material is cured to form the waterproof sealing material 5, the sealing material can be continuously applied to the upper surface 31 of the support concrete 3 and the side surface 202 of the structure 200. Further, when the solid sealing material is used as the waterproof sealing material 5, a single sealing material can be continuously attached to the upper surface 31 of the support concrete 3 and the side surface 202 of the structure 200.

[0068] In the embodiment shown in FIG. 9, in the angle member fixing step S30, the first plate portion 42 of the angle member 4 is fixed to the support concrete 3 by the anchor 8. That is, in the angle member fixing step S30, the shaft portion 82 of the anchor 8 is passed through the first plate portion 42 of the angle member 4, and the shaft portion 82 is fixed to the hole 33 formed in the support concrete 3. On the other hand, the head portion 84 of the anchor 8 is brought into contact with the upper surface 42d of the first plate portion 42, and the first plate portion 42 is fixed to the support concrete 3 in the height direction X1 of the exterior building material 2. By fixing the first plate portion 42 to the support concrete 3 by the anchor 8, the waterproof sealing material 5 can be more reliably sandwiched between the upper surface 31 of the support concrete 3 and the lower surface 42c of the first plate portion 42. Therefore, the waterproof performance between the support concrete 3 and the first plate portion 42 can be improved.

[0069] In the embodiment illustrated in FIG. 9, in the angle member fixing step S30, the first plate portion 42 is fixed to the support concrete 3 by passing the anchor 8 through the first plate portion 42 on the indoor side of the waterproof sealing material 5. Therefore, it is difficult for water that has entered between the support concrete 3 and the first plate portion 42 from the outdoors to reach the anchor 8, so deterioration of the anchor 8 can be prevented. That is, the support structure 1 with more improved durability can be provided.

[0070] In some embodiments, after the angle member fixing step S30 and before the exterior building material assembling step S40, a filler 7 is disposed on the upper surface 42d of the first plate portion 42 of the angle member 4. After disposing the filler 7 on the upper surface 42d of the first plate portion 42, the exterior building material assembling step S40 is performed. Since the exterior building material 2 is assembled to the angle member 4 after the installation of the filler 7, the filler 7 can be effectively installed in the gap between the lower surface 2c of the exterior building material 2 and the upper surface 42d of the first plate portion 42.

[0071] In some embodiments, as shown in FIG. 6, the construction method of the exterior building material support structure 1 further includes a waterproof seal installation step S50 after the exterior building material assembling step S40. The waterproof seal installation step S50 is a step of installing at least one waterproof seal 20 (22, 24) outside the angle member 4 along the width direction X2 of the exterior building material 2 between the support concrete 3 and the exterior building material 2. That is, after assembling the exterior building material 2 to the angle member 4, the waterproof seal installation step S50 is performed. At this time, as shown in FIGS. 9 to 12, the waterproof seal 20 (22, 24) is installed in the gap G between the support concrete 3 and the exterior building material 2 outside the angle member 4. Therefore, since the gap G between the exterior building material 2 and the support concrete 3 is blocked by the waterproof seal 20 (22, 24), it is difficult for water to enter between the support concrete 3 and the first plate portion 42. Therefore, a support structure 1 with better waterproof performance can be provided.

[0072] In some embodiments, as shown in FIG. 7, the waterproof seal installation step S50 includes a first waterproof seal installation step S52 of installing the first waterproof seal 22, and a second waterproof seal installation step S56 of installing the second waterproof seal 24 after the first waterproof seal installation step S52. That is, the first waterproof seal 22 and the second waterproof seal 24 are installed as the waterproof seal 20. As shown in FIGS. 10 and 12, the second waterproof seal 24 is installed at a distance outside the first waterproof seal 22 on the outdoor side. Further, the second waterproof seal 24 is installed so that a gap G is formed between the first waterproof seal 22 and the second waterproof seal 24. Note that the first waterproof seal 22 and the second waterproof seal 24 respectively correspond to one of the pair of waterproof seals 22 and 24 described above, namely, one waterproof seal 22 and the other waterproof seal 24. Since the second waterproof seal 24 is installed at a distance outside the first waterproof seal 22 on the outdoor side, when lateral shaking such as an earthquake occurs, the possibility that the waterproof seals (20 (22, 24)) pull on each other and break can be reduced. Therefore, a support structure 1 with higher durability can be provided.

[0073] In the embodiment shown in FIG. 7, the waterproof seal installation step S50 further includes a backup material installation step S54 of installing a backup material 30 outside the first waterproof seal 22 on the outdoor side between the first waterproof seal installation step S52 and the second waterproof seal installation step S56. At this time, in the second waterproof seal installation step S56, the second waterproof seal 24 is installed outside the backup material 30 on the outdoor side. That is, as shown in FIG. 11, after installing the first waterproof seal 22, the backup material 30 is installed in the gap G outside the first waterproof seal 22 on the outdoor side. After installing the backup material 30, the second waterproof seal 24 is installed in the gap G outside the backup material 30 on the outdoor side. Since the backup material 30 is installed between the first waterproof seal 22 and the second waterproof seal 24, when lateral shaking such as an earthquake occurs, the possibility that the first waterproof seal 22 and the second waterproof seal 24 rub against each other and are damaged can be reduced. Therefore, a support structure 1 with higher durability can be provided.

[0074] In one embodiment, a paste-like sealing material may be filled into the gap G and cured, and then the sealing material may be disposed in the gap G as a waterproof seal 20 (22, 24). By using the paste-like sealing material as the waterproof seal 20 (22, 24), the gap between the exterior building material 2 and the supporting concrete 3 can be effectively filled. Therefore, the waterproof property and durability of the support structure 1 can be further improved. In other embodiments, a solid sealing material processed into the shape of the gap G may be embedded in the gap G as a waterproof seal 20 (22, 24). By using the solid sealing material as the waterproof seal 20 (22, 24), the sealing material processed into the shape of the gap G can be prepared in advance, so that the placement operation of the waterproof seal 20 (22, 24) can be completed promptly.

[0075] In some embodiments, as shown in FIG. 6, the construction method of the exterior building material support structure 1 further includes a waterproof film attaching step S60 after the exterior building material assembling step S40. The waterproof film attaching step S60 is a step of attaching a waterproof film 60 at least to the outdoor side surface 2a of the exterior building material 2 so as to extend along the height direction X1 of the exterior building material 2 from the upper surface 31 of the supporting concrete 3 on the outdoor side. That is, as shown in FIG. 12, after the exterior building material 2 is assembled to the angle member 4, on the outdoor side, the waterproof film 60 is attached from the upper surface 31 of the supporting concrete 3 to a height position above the lower surface 2c of the exterior building material 2. Therefore, on the outdoor side, the gap between the exterior building material 2 and the supporting concrete 3 is blocked by the waterproof film 60, so that the support structure 1 with improved waterproof property can be provided.

[0076] In the embodiment shown in FIG. 6, the waterproof film attaching step S60 is performed after the exterior building material assembling step S40 and after the waterproof seal installing step S50. That is, as shown in FIG. 12, the waterproof film 60 is attached to the upper surface 31 of the supporting concrete 3, the outdoor side surface 2a of the exterior building material 2, and the outdoor side surface 20a (24a) of the waterproof seal 20 (24).

[0077] In one embodiment, as shown in FIG. 12, in the waterproof film attachment step S60, the waterproof film 60 is attached to the upper surface 31 of the support concrete 3 so as to extend outward from the position of the outdoor side surface 2a of the exterior building material 2 toward the outdoor side.

[0078] In one embodiment, a sheet-like material may be attached to the outdoor side surface 2a of the exterior building material 2 as the waterproof film 60. By using the sheet-like material as the waterproof film 60, the waterproof film 60 processed into a desired shape can be prepared in advance, so that the attachment work of the waterproof film 60 can be completed promptly. In other embodiments, a liquid waterproof agent may be solidified to form the waterproof film 60. By solidifying the liquid waterproof agent to form the waterproof film 60, the gap between the exterior building material 2 and the support concrete 3 can be effectively filled. Therefore, the waterproofness and durability of the support structure 1 can be further improved.

[0079] Summarizing the characteristic configurations of the construction method of the exterior building material support structure 1 according to some of the above embodiments, it is as follows.

[0080] [1] The construction method of the exterior building material support structure (1 (1A, 1B)) according to some embodiments is A construction method of an exterior building material support structure (1 (1A, 1B)) that supports an exterior building material (2) that partitions the indoor and outdoor of a building (9), A waterproof sealant installation step (S10) of installing a waterproof sealant (5) along the width direction (X2) of the exterior building material (2) on the support concrete (3); An angle member (4) including a first plate portion (42) for supporting the exterior building material (2) and a second plate portion (44) extending so as to intersect the first plate portion (42), and a waterproof sealant (5) is sandwiched between the first plate portion (42) and the support concrete (3). An angle member installation step (S20) of installing the angle member (4) along the width direction (X2); An angle member fixing step (S30) of fixing the first plate portion (42) of the angle member (4) to the support concrete (3); An exterior building material assembling step (S40) of assembling the exterior building material (2) to the angle member (4) such that the outdoor side surface (44a) of the second plate portion (44) of the angle member (4) faces the indoor side surface (2b) of the exterior building material (2). It is provided with.

[0081] According to the construction method of [1] above, in the angle member installation step (S20), the angle member (4) is installed along the width direction (X2) of the exterior building material (2) so as to sandwich the waterproof sealant (5) between the angle member (4) for supporting the exterior building material (2) and the support concrete (3). Then, in the angle member fixing step (S30), since the first plate portion (42) of the angle member (4) is fixed to the support concrete (3), waterproofness between the first plate portion (42) and the support concrete (3) can be ensured. And in the exterior building material assembling step (S40), the exterior building material (2) is assembled to the angle member (4) such that the outdoor side surface (44a) of the second plate portion (44) of the angle member (4) faces the indoor side surface (2a) of the exterior building material (2), so that an exterior building material support structure (1(1A, 1B)) with ensured waterproofness can be provided with a small number of construction man-hours.

[0082] [2] In some embodiments, in the construction method of [1] above, In the angle member fixing step (S30), the first plate portion (42) is fixed to the support concrete (3) by passing an anchor (8) through the first plate portion (42) on the indoor side of the waterproof sealant (5).

[0083] According to the construction method of [2] above, in the angle member fixing step (S30), since the first plate portion (42) is fixed to the support concrete (3) by passing the anchor (8) through the first plate portion (42) on the outdoor side of the waterproof sealant (5), water that has entered between the support concrete (3) and the first plate portion (42) from the outside is less likely to reach the anchor (8). Therefore, deterioration of the anchor (8) can be prevented, and an exterior building material support structure (1(1A, 1B)) with more improved durability can be provided.

[0084] [3] In some embodiments, in the construction method of [1] or [2] above, the waterproof sealant installation step (S10) is a first part installation step (S12) of installing a first part (52) of the waterproof sealant (5) along the width direction (X2) on the support concrete (3), a second part installation step (S14) of rising from the end (54) of the first part (52) in the width direction (X2) and installing a second part (56) of the waterproof sealant (5) along the side surface (202) of the adjacent structure (200), and includes.

[0085] According to the construction method of [3] above, in the second part installation step (S14) of the waterproof sealant installation step (S10), it rises from the end (54) of the first part (52) in the width direction (X2) and installs the second part (56) of the waterproof sealant (5) along the side surface (202) of the adjacent structure (200). Since the second part (56) extends along the side surface (202) of the structure (200), even if water accumulates outside the building (9), the intrusion of water from the outside to the inside can be more effectively prevented. Therefore, an exterior building material support structure (1 (1A, 1B)) with better waterproof performance can be provided.

[0086] [4] In some embodiments, in any of the construction methods of [1] to [3] above, the construction method of the exterior building material support structure (1 (1A, 1B)) is after the exterior building material assembly step (S40), further includes a waterproof seal installation step (S50) of installing at least one waterproof seal (20 (22, 24)) outside the angle member (4) along the width direction (X2) between the support concrete (3) and the exterior building material (2).

[0087] According to the construction method of [4] above, after the step of assembling exterior building materials (S40), a waterproof seal installation step (S50) is performed, and at least one waterproof seal (20 (22, 24)) is installed on the outdoor side of the angle member (4). Since the gap (G) between the exterior building material (2) and the support concrete (3) is blocked by the waterproof seal (20 (22, 24)), it becomes difficult for water to enter between the support concrete (3) and the first plate portion (42). Therefore, an exterior building material support structure (1 (1A, 1B)) with improved waterproof performance can be provided.

[0088] [5] In some embodiments, in the construction method of [4] above, The waterproof seal installation step (S50) includes a first waterproof seal installation step (S52) of installing the first waterproof seal (22), and a second waterproof seal installation step (S56) of installing the second waterproof seal (24) at a distance from the first waterproof seal (22) on the outdoor side after the first waterproof seal installation step (S52). It includes.

[0089] When a plurality of waterproof seals are adhesively arranged with each other in the thickness direction (X3) of the exterior building material (2), there is a risk that the waterproof seals may pull on each other due to lateral shaking such as an earthquake. If the waterproof seals pull on each other, the waterproof seals may break, and the waterproof performance of the exterior building material support structure may deteriorate. In this regard, according to the construction method of [5] above, after installing the first waterproof seal (22) in the first waterproof seal installation step (S52), the second waterproof seal (24) is installed at a distance from the first waterproof seal (22) on the outdoor side in the second waterproof seal installation step (S56). Therefore, when lateral shaking such as an earthquake occurs, the possibility that the waterproof seals (20 (22, 24)) pull on each other and break can be reduced. Therefore, an exterior building material support structure (1 (1A, 1B)) with improved durability can be provided.

[0090] [6] In some embodiments, in the construction method of [5] above, The waterproof seal installation step (S50) further includes a backup material installation step (S54) of installing a backup material (30) outside the first waterproof seal (22) between the first waterproof seal installation step (S52) and the second waterproof seal installation step (S56). In the second waterproof seal installation step (S56), a second waterproof seal (24) is installed outside the backup material (30).

[0091] According to the construction method of [6] above, after the first waterproof seal installation step (S52) and before the second waterproof seal installation step (S56), the backup material installation step (S54) is performed. Since the backup material (30) can be installed between the first waterproof seal (22) and the second waterproof seal (24), when lateral shaking such as an earthquake occurs, the possibility that the first waterproof seal (22) and the second waterproof seal (24) rub against each other and are damaged can be reduced. Therefore, an exterior building material support structure (1(1A, 1B)) with improved durability can be provided.

[0092] [7] In some embodiments, in the construction method of [1] to [6] above, the exterior building material support structure (1(1A, 1B)) further includes a waterproof film pasting step (S60) of pasting a waterproof film (60) on at least the outdoor side surface (2a) of the exterior building material (2) so as to extend along the height direction (X1) of the exterior building material (2) from the upper surface (31) of the support concrete (3) on the outdoor side after the exterior building material assembly step (S40).

[0093] According to the construction method of [7] above, since the waterproof film pasting step (S60) is carried out after the exterior building material assembling step (S40), at least on the outdoor side, the waterproof film (60) can be pasted on at least the outdoor side surface (2a) of the exterior building material (2) so as to extend along the height direction (X1) of the exterior building material (2) from the upper surface (31) of the support concrete (3). Since the gap between the exterior building material (2) and the support concrete (3) is blocked by the waterproof film (60) on the outdoor side, an exterior building material support structure (1(1A, 1B)) with better waterproof performance can be provided.

[0094] As described above, several embodiments of the present invention have been described. Of course, modifications may be made to the above-described embodiments without departing from the spirit of the present invention.

[0095] In this specification, expressions representing relative or absolute arrangements such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric", or "coaxial" not only strictly represent such arrangements, but also represent a state of being relatively displaced with tolerances or at an angle or distance such that the same function can be obtained. For example, expressions representing that things such as "identical", "equal", and "homogeneous" are in an equal state not only strictly represent an equal state, but also represent a state in which there are tolerances or differences such that the same function can be obtained. Also, in this specification, expressions representing shapes such as a rectangular shape or a cylindrical shape not only represent shapes such as a rectangular shape or a cylindrical shape in a geometrically strict sense, but also represent shapes including concave and convex portions, chamfered portions, etc. within a range where the same effect can be obtained. Also, in this specification, the expressions "comprising", "including", or "having" for one component are not exclusive expressions excluding the existence of other components.

Explanation of Reference Numerals

[0096] 1(1A, 1B): Exterior building material support structure (support structure) 2: Exterior building material 2a: Outdoor side surface 2b: Inner side surface 3: Support concrete 4: Angle member 5: Waterproof sealing material 8: Anchor 9: Building 20: Waterproof seal 22: First waterproof seal 24: Second waterproof seal 30: Backup material 31: Upper surface 42: First plate part 44: Second plate part 52: First part 54: End part 56: Second part 60: Waterproof film 200: Structure 202: Side surface S10: Waterproof sealing material installation step S20: Angle member installation step S30: Angle member fixing step S40: Exterior building material assembly step S50: Waterproof seal installation step S52: First waterproof seal installation step S54: Backup material installation step S56: Second waterproof seal installation step S60: Waterproof film pasting step X1: Height direction X2: Width direction

Claims

1. A construction method for an exterior building material support structure that supports an exterior building material that separates the indoor and outdoor areas of a building, comprising the steps of: A waterproof sealant installation step of installing a waterproof sealant on the supporting concrete along the width direction of the exterior building material; an angle member including a first plate portion for supporting an exterior building material and a second plate portion extending so as to cross the first plate portion, the angle member being installed along the width direction so as to sandwich the waterproof sealant between the first plate portion and the supporting concrete; and an angle member fixing step of fixing the first plate portion of the angle member to the supporting concrete; an exterior building material assembling step of assembling the exterior building material to the angle member so that an outdoor side surface of the second plate portion faces an indoor side surface of the exterior building material; Equipped with The waterproof sealant installation step includes: a first portion installation step of installing a first portion of the waterproof sealant on the supporting concrete along the width direction; a second portion installation step of installing a second portion of the waterproof sealant along a side surface of an adjacent structure, the second portion rising from an end of the first portion in the width direction; Includes Method of construction of exterior building material support structure.

2. In the angle member fixing step, an anchor is inserted into the first plate portion on the indoor side of the waterproof sealant, thereby fixing the first plate portion to the supporting concrete. A method for constructing the exterior building material support structure according to claim 1.

3. The method further includes a waterproof seal installation step of installing at least one waterproof seal between the supporting concrete and the exterior building material on the outdoor side of the angle member along the width direction after the exterior building material installation step. A method for constructing the exterior building material support structure according to claim 1 or 2.

4. The waterproof seal installation step includes: a first waterproof seal installation step of installing a first waterproof seal; a second waterproof seal installation step of installing a second waterproof seal on the outdoor side at a distance from the first waterproof seal after the first waterproof seal installation step; Includes A method for constructing the exterior building material support structure according to claim 3.

5. The waterproof seal installation step further includes a backup material installation step of installing a backup material on the outdoor side of the first waterproof seal between the first waterproof seal installation step and the second waterproof seal installation step, In the second waterproof seal installation step, the second waterproof seal is installed on the outdoor side of the back-up material. A method for constructing the exterior building material support structure according to claim 4.

6. The method further includes a waterproofing film attachment step of attaching a waterproofing film to at least the exterior side of the exterior building material so as to extend from the upper surface of the supporting concrete along the height direction of the exterior building material on the exterior side after the exterior building material assembly step. A method for constructing the exterior building material support structure according to claim 1 or 2.

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