Outer wall mounting structure and construction method of outer wall mounting structure

Abstract

To provide an exterior wall mounting hardware, an exterior wall mounting structure, and a construction method of the exterior wall mounting structure that enable one-person work and improve workability.SOLUTION: An exterior wall mounting hardware 1 is an exterior wall mounting hardware 1 for fixing an exterior wall material 4 formed in an L-shaped cross section having a vertical portion 40 and a horizontal portion 41 to a beam 3 having a horizontal flat lower flange portion 30 at least at its lower end, which comprises: a vertical flat first plate portion 10 fixed to an interior side surface of the vertical portion 40 of the exterior wall material 4; a second plate portion 11 extending horizontally from the lower end of the first plate portion 10 and fixed in contact with the lower surface of the lower flange portion 30; and a fastening arm portion 12 extending horizontally from the first plate portion 10 and abutting the upper surface of the lower flange portion 30.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to an outer wall mounting structure using an outer wall mounting metal fitting for fixing an outer wall material formed in an L-shaped cross section to a beam, and a construction method of the outer wall mounting structure. tool

Background Art

[0002] Conventionally, an outer wall mounting structure is known in which an angled outer wall mounting bracket fixed to an outer wall material is fixed to a building frame such as a beam or a column, and the outer wall material is attached to the building frame (see Patent Documents 1 to 3). Specifically, such an outer wall mounting structure is, for example, by bringing one mounting surface of the outer wall mounting bracket into contact with a frame-shaped or rail-shaped steel material formed on the back surface of the outer wall material and fixing it with bolts and nuts, and bringing the other mounting surface of the outer wall mounting bracket into contact with a mounting portion formed in a horizontal plate shape on the building frame and fixing it with bolts and nuts.

[0003] Among such outer wall mounting structures, for example, as described in Patent Document 1, a vertical long hole for inserting a bolt is formed in one mounting surface of the outer wall mounting bracket, and a horizontal long hole for inserting a bolt is formed in the other mounting surface of the outer wall mounting bracket, so that unevenness or level adjustment of the outer wall material can be performed.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] ​When constructing such an outer wall mounting structure, it is necessary to perform the operation of tightening bolts and nuts while holding the outer wall material in a desired position, and at least two workers, namely, at least one worker who holds the outer wall material and one or more workers who tighten the bolts and nuts, are required. Similarly, when adjusting unevenness or level, at least two workers are required, namely, one or more workers who hold the outer wall and one or more workers who loosen and tighten the bolts and nuts again.

[0006] The present invention aims to enable one-person operation and improve workability. outer An object of the present invention is to provide a wall mounting structure and a method for constructing an outer wall mounting structure.

Means for Solving the Problems

[0008] The outer wall mounting structure of the present invention a beam provided with a horizontal flat plate-like lower flange portion at least at the lower end thereof, and an outer wall member formed in an L-shaped cross section having a vertical portion and a horizontal portion, and a groove portion of a C-shaped steel formed in a horizontal direction along the back surface of the vertical portion, and the an outer wall mounting fitting for fixing an outer wall material to the beam having the lower flange portion, is an outer wall mounting structure including, and the outer wall mounting fitting is the on the the a vertical flat plate-shaped first plate portion fixed to the indoor side surface of the vertical portion of the outer wall material, a second plate portion extending horizontally from the lower end of the first plate portion and fixed in contact with the lower surface of the lower flange portion, and a locking arm portion extending horizontally from the first plate portion and in contact with the upper surface of the lower flange portion.

[0009] The outer wall mounting structure of the present invention further includes a mounting plate housed in the groove portion and having screw holes, and a mounting bolt inserted into a mounting hole formed in the first plate portion and screwed into the screw holes to attach the outer wall mounting fitting to the outer wall material. The mounting hole is a long hole elongated in the vertical direction.

[0010] The outer wall mounting structure of the present invention is characterized in that the mounting bolt is an extremely low-profile bolt.

[0011] The outer wall mounting structure of the present invention is characterized in that a fixing hole into which a fixing bolt is inserted is formed in the lower flange portion of the beam, and an insertion hole into which the fixing bolt is inserted is formed in the second plate portion. The insertion hole is a long hole elongated in the extending direction of the second plate portion.

[0012] The outer wall mounting structure of the present invention is characterized in that the fixing bolt is inserted into the insertion hole and the fixing hole from below, and a nut is fastened above the lower flange portion.

[0013] In the outer wall mounting structure of the present invention, the horizontal portion of the outer wall material is formed to protrude from the lower end of the vertical portion so that a part of the lower flange portion overlaps the upper side, the fixing hole is formed in the lower flange portion at a position where the horizontal portion does not overlap, and the second plate portion extends in the horizontal direction more than the lower flange portion, and an insertion hole is formed at a position overlapping the fixing hole.

[0014] The outer wall mounting structure of the present invention is characterized in that the beam is a reinforcing beam formed by fixing a shaped steel formed in an upside-down T shape to the lower surface of an H-shaped steel.

[0015] The construction method of the outer wall mounting structure of the present invention is a construction method of any of the above outer wall mounting structures, and includes a step of attaching the first plate portion of the outer wall mounting fitting to the inner surface of the vertical portion of the outer wall material, a step of sandwiching and holding the lower flange portion of the beam between the locking arm portion and the second plate portion of the outer wall mounting fitting to which the outer wall material is attached, and a step of fixing the lower flange portion and the second plate portion.

Effects of the Invention

[0016] In the present invention According to the outer wall mounting structure , the outer wall mounting fitting isWith the first plate portion fixed to the indoor side surface of the vertical portion of the outer wall member having an L-shaped cross section, the locking arm portion abuts against the upper surface of the lower flange portion of the beam, and the second plate portion abuts against the lower surface of the lower flange portion. Therefore, the lower flange portion can be sandwiched and held between the locking arm portion and the second plate portion. Accordingly, with the outer wall member fixed to the first plate portion, the outer wall mounting fitting can be temporarily placed on the lower flange portion, and it is not necessary to fix the second plate portion and the lower flange portion while lifting the outer wall member to the position where it should be fixed. Thus, the work of attaching the outer wall member to the beam can be carried out by one person. Also, since it is temporarily placed before fixing the second plate portion and the lower flange portion, the work of adjusting the position of the outer wall member can be made easier.

[0017] According to the outer wall mounting structure of the present invention, it includes a beam provided with a lower flange portion at the lower end, an outer wall member formed in an L-shape having a vertical portion and a horizontal portion, with a groove portion of a C-shaped steel formed horizontally along the back surface of the vertical portion, and the above-mentioned outer wall mounting fitting. Therefore, with the outer wall member fixed to the first plate portion, by sandwiching the lower flange portion between the locking arm portion and the second plate portion, the outer wall mounting fitting can be temporarily placed on the lower flange portion, and the work of attaching the outer wall member to the beam can be safely carried out by one person. Also, by temporarily placing it, the work of adjusting the position of the outer wall member can be made easier.

[0018] According to the outer wall mounting structure of the present invention, a mounting plate is housed in a groove portion formed on the back surface of the vertical portion of the outer wall member, and a mounting bolt inserted into a mounting hole formed in the first plate portion of the outer wall mounting fitting is screwed into a screw hole of the mounting plate, so that the outer wall mounting fitting is fixed to the outer wall member. Since the mounting hole into which the mounting bolt is inserted is an elongated hole that is long in the vertical direction, the position of the outer wall member with respect to the outer wall mounting fitting can be adjusted up and down, and the vertical position of the outer wall member attached to the beam can be adjusted.

[0019] According to the outer wall mounting structure of the present invention, since the mounting hole is an elongated hole that is long in the vertical direction as described above, the mounting bolt can move up and down within the range of the mounting hole with respect to the outer wall mounting fitting. Although there is a possibility that the bolt head of the mounting bolt may interfere with a beam or the like, since the mounting bolt is an extremely low-profile bolt, such interference can be suppressed.

[0020] According to the outer wall mounting structure of the present invention, by inserting a fixing bolt into a fixing hole formed in the lower flange portion of the beam and an insertion hole formed in the second plate portion of the outer wall mounting fitting, the beam and the outer wall mounting fitting are fixed. Since the insertion hole is an elongated hole that is long in the extending direction of the second plate portion, the outer wall mounting fitting and the outer wall material fixed to the outer wall mounting fitting can be moved relative to the beam, and the unevenness of the outer wall material can be adjusted.

[0021] According to the outer wall mounting structure of the present invention, the fixing bolt is inserted into the insertion hole and the fixing hole from below, and the nut is fastened above the lower flange portion. Therefore, only the bolt head is formed below the fixing bolt, so that the fixing bolt does not protrude significantly downward, and it is possible to prevent members such as the horizontal portion of the outer wall material and the edge of the soffit from interfering with the fixing bolt.

[0022] According to the outer wall mounting structure of the present invention, the horizontal portion of the outer wall material protrudes from the lower end of the vertical portion so that a part of the lower flange portion overlaps the upper side. The fixing hole formed in the lower flange portion is formed at a position where the horizontal portion does not overlap. The second plate portion extends in the horizontal direction more than the lower flange portion, and the insertion hole is formed at a position overlapping the fixing hole. Therefore, when inserting the fixing bolt to fix the outer wall mounting fitting to which the outer wall material is fixed and the beam, the horizontal portion of the outer wall material does not get in the way, and the fixing work to the beam can be made relatively easy.

[0023] According to the outer wall mounting structure of the present invention, the beam is a reinforcing beam formed by fixing a shaped steel formed in an upside-down T shape to the lower surface of an H-shaped steel. Compared with the case of a simple H-shaped steel beam, the space for an operator to insert an arm, a tool, etc. is small, but since it is a configuration that is temporarily placed and fixed from below, the work of processing the outer wall material can be performed relatively easily.

[0024] According to the construction method of the outer wall mounting structure of the present invention, the method includes a step of attaching the first plate portion of the outer wall mounting fitting to the indoor side surface of the vertical portion of the outer wall material, and a step of sandwiching and holding the lower flange portion of the beam with the locking arm portion and the second plate portion of the outer wall mounting fitting to which the outer wall material is attached, and a step of fixing the lower flange portion and the second plate portion. Therefore, an operator can relatively easily perform the construction work of the outer wall mounting structure alone.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0026] Hereinafter, the outer wall mounting fitting 1, the outer wall mounting structure 2, and the construction method of the outer wall mounting structure according to the present invention will be described with reference to the respective drawings. The building in which the outer wall mounting structure 2 of the present embodiment is arranged is, for example, a steel-frame house. The building in which the outer wall mounting structure 2 in the present invention is provided is not limited to a house, and can be used in various facilities regardless of whether they are residential or non-residential. The outer wall mounting structure 2 in the present embodiment is a structure in which an outer wall material 4 is fixed to a beam 3 arranged on a ridge portion formed on the upper edge of the outdoor side of an opening (not shown) via an outer wall mounting fitting 1.

[0027] As shown in Fig. 3, the beam 3 is a reinforcing beam formed by fixing a shaped steel formed in an upside-down T shape to the lower surface of an H-shaped steel formed by connecting upper and lower flanges with a web, and the upper and lower three-stage flanges are connected by a web provided at the center in the width direction to form a parallel shape. Among the three-stage flanges of the beam 3, the outer wall mounting fitting 1 is fixed to the lowermost lower flange portion 30. The shape of the beam 3 in the outer wall mounting structure 2 of the present invention is not limited to the above-described reinforcing beam, but at least a lower flange portion 30 is formed at the lowermost end of the beam 3.

[0028] The outer wall material 4 is, for example, a concrete plate material formed in an L-shaped cross section having a vertical portion 40 and a horizontal portion 41 extending indoors from the lower end of the vertical portion 40. A C-shaped steel extending in the horizontal direction is embedded in the back surface of the vertical portion 40 of the outer wall material 4 to form a groove portion 42. Although not shown, an uneven pattern is formed on the outdoor side surface of the vertical portion 40 of the outer wall material 4.

[0029] As shown in Figs. 1 to 3, the outer wall mounting fitting 1 is formed by bending a steel plate, and includes a flat plate-shaped first plate portion 10 formed vertically, a second plate portion 11 bent and extending horizontally from the lower end of the first plate portion 10, and two locking arm portions 12 bent and extending horizontally from the left and right side ends of the first plate portion 10, respectively. The first plate portion 10 is a rectangular flat plate fixed to the indoor side surface of the vertical portion 40 of the outer wall material 4. An attachment hole 13 for fixing the outer wall mounting fitting 1 to the groove portion 42 of the outer wall material 4 is formed in the first plate portion 10. The attachment hole 13 is a vertically long oblong hole formed along the center line in the width direction of the first plate portion 10. The attachment hole 13 can insert the threaded portion of the attachment bolt 14, and the head of the attachment bolt 14 cannot be inserted. The attachment plate 15 is formed on a flat plate and has a threaded hole 16 into which the threaded portion of the attachment bolt 14 can be screwed at the center. The attachment bolt 14 is an extremely low head bolt. The height of the head of the extremely low head bolt is, for example, 1.5 mm or less, and it is preferably lower within the range that provides the necessary joining strength of the outer wall material 4 and the outer wall mounting fitting 1.

[0030] The second plate portion 11 extends horizontally from the lower end of the first plate portion 10, abuts against and is fixed to the lower surface of the lower flange portion 30 of the beam 3. The extension length of the second plate portion 11 from the lower end of the first plate portion 10 is slightly longer than the width of the lower flange portion 30 of the beam 3, and the second plate portion 11 extends to the edge separating from the outer wall member 4 of the lower flange portion 30. The second plate portion 11 extends indoors longer than the protruding length of the horizontal portion 41 of the outer wall member 4, and the tip of the second plate portion 11 is formed to protrude from the horizontal portion 41 of the outer wall. An insertion hole 18 into which the fixing bolt 17 can be inserted is formed in the second plate portion 11. The fixing bolt 17 is inserted into the insertion hole 18 from below, and further inserted into a fixing hole 19 formed in the lower flange portion 30 of the beam 3, and the nut 20 is tightened to fix the second plate portion 11 to the lower flange portion 30. The fixing hole 19 is formed at a position separated from the outer wall member 4 of the lower flange portion 30, and the insertion hole 18 is formed at a position overlapping the fixing hole 19 of the second plate portion 11. The position where the insertion hole 18 is formed is the position where the second plate portion 11 protrudes from the horizontal portion 41 of the outer wall member 4, and the outer wall mounting fitting 1 can be fixed to the lower flange portion 30 without the horizontal portion 41 of the outer wall member 4 getting in the way. The fixing hole 19 formed in the lower flange portion 30 of the beam 3 is a through hole slightly larger than the nominal diameter of the threaded portion of the fixing bolt 17, and the insertion hole 18 formed in the second plate portion 11 is an elongated hole long in the extending direction of the second plate portion 11. Since the insertion hole 18 is an elongated hole, the outer wall mounting fitting 1 can be moved along the length direction of the insertion hole 18 with the fixing bolt 17 inserted into the insertion hole 18, and the unevenness of the vertical portion 40 of the outer wall member 4 can be adjusted.

[0031] The locking wrist portions 12 are formed by horizontally extending upward from both side edges of the first plate portion 10 to above the second plate portion 11 respectively. The locking wrist portions 12 are parallel to the second plate portion 11 and form a gap substantially equal to the thickness of the lower flange portion 30 therebetween. By arranging the beam 3 between the locking wrist portions 12 and the second plate portion 11 of the outer wall mounting fitting 1, the outer wall mounting fitting 1 can be temporarily placed on the beam 3, and the outer wall material 4 fixed to the outer wall mounting fitting 1 can also be temporarily placed. In this way, after fixing the outer wall material 4 to the first plate portion 10 and temporarily placing the outer wall mounting fitting 1 on the lower flange portion 30, and performing the operation of lifting the outer wall material 4 to the position to be fixed, the operation of fixing the second plate portion 11 and the lower flange portion 30 with the fixing bolt 17 can be carried out, and the operation of attaching the outer wall material 4 to the beam 3 can be performed by one person. Also, since it is temporarily placed before fixing the second plate portion 11 and the lower flange portion 30, the operation of adjusting the position of the outer wall material 4 can be made easy.

[0032] As shown in FIG. 3, above the vertical portion 40 of the outer wall material 4, an upper outer wall material 5 fixed to the building body is arranged with a joint width opened from the upper end of the outer wall material 4, and the backup material 21 and the joint material 22 are filled to form a horizontal joint. Also, on the indoor side of the horizontal portion 41 of the outer wall material 4, a soffit edge 23 is provided and the soffit board material 24 is laid. A gap is formed between the edge of the soffit board material 24 and the horizontal portion 41 of the outer wall material 4, and a soffit parting material 25 is provided.

[0033] A construction method for an outer wall mounting structure for constructing the outer wall mounting structure as described above first performs a step of attaching an outer wall mounting fitting 1 to an outer wall member 4 as shown in FIG. 4. Specifically, first, a mounting plate 15 is inserted into a groove portion 42 formed on the indoor side surface of the vertical portion 40 of the outer wall member 4. The mounting plate 15 is formed such that the length of the short side is shorter than the opening between the lips of the groove portion 42, and the length of the long side is longer than the opening between the lips. Therefore, after inserting the mounting plate 15 into the groove portion 42 with the short side of the mounting plate 15 facing the width direction of the opening of the groove portion 42, the mounting plate 15 is rotated 90 degrees to be housed in the groove portion 42. Then, the first plate portion 10 of the outer wall mounting fitting 1 is brought into contact with the lip of the groove portion 42, the mounting bolt 14 is inserted into the mounting hole 13 formed in the first plate portion 10, screwed into the screw hole 16 of the mounting plate 15, and the mounting bolt 14 is further tightened to sandwich the lip of the groove portion 42 between the mounting plate 15 and the first plate portion 10, thereby attaching the outer wall mounting fitting 1 to the outer wall member 4. When the outer wall member 4 is attached to the outer wall mounting fitting 1, the second plate portion 11 of the outer wall mounting fitting 1 extends longer than the horizontal portion 41 of the outer wall member 4, and the insertion hole 18 of the second plate portion 11 is arranged at a position where it does not overlap with the horizontal portion 41 of the outer wall member 4.

[0034] Then, as shown in FIG. 6, the outer wall member 4 with the outer wall mounting fitting 1 attached is lifted to the position where the outer wall member 4 is to be arranged, and the lower flange portion 30 of the beam 3 is sandwiched between the locking arm portion 12 and the second plate portion 11 of the outer wall mounting fitting 1, so that the outer wall member 4 is temporarily placed on the beam 3. Next, the height position of the outer wall member 4 in the state of being temporarily placed on the beam 3 is confirmed. If it is necessary to adjust the height of the outer wall member 4 up and down, the outer wall member 4 is once removed from the beam 3. At this time, since the outer wall mounting fitting 1 attached to the outer wall member 4 only sandwiches the lower flange portion 30 of the beam 3 between the locking arm portion 12 and the second plate portion 11, the outer wall member 4 can be removed from the beam 3 very easily. Then, the mounting bolt 14 is loosened, the position of the outer wall member 4 in the height direction with respect to the outer wall mounting fitting 1 is adjusted along the mounting hole 13, the mounting bolt 14 is tightened again, the outer wall mounting fitting 1 is attached to the outer wall member 4, and again, the lower flange portion 30 of the beam 3 is sandwiched between the locking arm portion 12 and the second plate portion 11 of the outer wall mounting fitting 1, and the outer wall member 4 is temporarily placed on the beam 3. At this time, as shown in FIG. 5, by adjusting the position of the outer wall member 4 in the height direction, the bolt head of the mounting bolt 14 moves up and down along the mounting hole 13 which is a long hole vertically long, and the bolt head approaches the lower flange portion 30 of the beam 3. However, since the mounting bolt 14 is an extremely low-profile bolt, the bolt head and the lower flange portion 30 do not interfere with each other, and the position adjustment of the outer wall member 4 in the height direction can be appropriately performed.

[0035] Then, as shown in FIG. 7, the fixing bolt 17 is inserted into the insertion hole 18 formed in the second plate portion 11 of the outer wall mounting fitting 1 from below, and further inserted into the fixing hole 19 formed in the lower flange portion 30 of the beam 3. By tightening the nut 20 on the fixing bolt 17 above the lower flange portion 30, the second plate portion 11 and the lower flange portion 30 are connected. Since the fixing bolt 17 is inserted from below, only the bolt head of the fixing bolt 17 protrudes from the lower side of the second plate portion 11, and the threaded portion of the fixing bolt 17 does not protrude downward as in the case of fixing from above. As shown in FIG. 8, interference with other members such as the eaves edge 23 can be prevented. Further, the outer wall mounting fitting 1 sandwiches the lower flange portion 30 between the locking arm portion 12 and the second plate portion 11, so that the outer wall material 4 and the outer wall mounting fitting 1 are temporarily placed. Therefore, when inserting and fixing the fixing bolt 17 into the insertion hole 18 and the fixing hole 19 from below, it is not necessary for the operator to support the outer wall material 4 and the outer wall mounting fitting 1, and the operator can perform the work relatively easily alone. At this time, before completely tightening the fixing bolt 17 and the nut 20, the unevenness of the vertical portion 40 of the outer wall material 4 is adjusted. The insertion hole 18 formed in the second plate portion 11 into which the fixing bolt 17 is inserted is an elongated hole, and since the outer wall mounting fitting 1 is temporarily placed by sandwiching the lower flange portion 30 between the locking arm portion 12 and the second plate portion 11, the unevenness can be adjusted by pulling the outer wall mounting fitting 1 outward or pushing it inward. When the unevenness is adjusted, the fixing bolt 17 is tightened sufficiently to fix the outer wall mounting fitting 1 and the lower flange portion 30, and the outer wall material 4 is fixed to the beam 3.

[0036] Thereafter, as shown in FIG. 8, the eaves edge 23 is fixed, the soffit board material 24 is laid, and further, as shown in FIG. 3, the soffit parting material 25 is installed at the edge of the soffit board material 24. Further, between the upper side of the vertical portion 40 of the outer wall material 4 and the upper outer wall material 5, a backup material 21 and a joint material 22 are filled in the formed gap to form a horizontal joint.

[0037] It goes without saying that the embodiments of the present invention are not limited to the above-described embodiments and can be appropriately changed without departing from the scope of the idea of the present invention.

Industrial Applicability

[0038] The outer wall mounting fitting 1, the outer wall mounting structure 2, and the construction method of the outer wall mounting structure according to the present invention are suitable as an outer wall mounting fitting 1, an outer wall mounting structure 2, and a construction method of the outer wall mounting structure for attaching an outer wall material 4 having an L-shaped cross section to a beam 3 disposed on a ridge portion formed at an upper edge on the outdoor side of an opening of a house.

Explanation of Reference Numerals

[0039] 1 Outer wall mounting fitting 2 Outer wall mounting structure 3 Beam 4 Outer wall material 10 First plate portion 11 Second plate portion 12 Locking arm portion 13 Mounting hole 14 Mounting bolt 15 Mounting plate 16 Screw hole 17 Fixing bolt 18 Insertion hole 19 Fixing hole 30 Lower flange portion 40 Vertical portion 41 Horizontal portion 42 Groove portion

Claims

1. A beam provided with a horizontal flat lower flange portion at least at the lower end, an outer wall member formed in an L-shaped cross-section having a vertical portion and a horizontal portion, and a groove portion of a C-shaped steel formed horizontally along the back surface of the vertical portion, an outer wall mounting fitting for fixing the outer wall member to the beam having the lower flange portion, An outer wall mounting structure comprising: The outer wall mounting fitting includes: a vertical flat first plate portion fixed to the indoor side surface of the vertical portion of the outer wall member, a second plate portion extending horizontally from the lower end of the first plate portion and contacting and fixed to the lower surface of the lower flange portion, a locking arm portion extending horizontally from the first plate portion and contacting the upper surface of the lower flange portion, and is characterized by an outer wall mounting structure.

2. a mounting plate housed in the groove portion and having screw holes, and a mounting bolt that is inserted into a mounting hole formed in the first plate portion and screwed into the screw holes to attach the outer wall mounting fitting to the outer wall member. The outer wall mounting structure according to claim 1, wherein the mounting hole is a long hole elongated in the vertical direction.

3. The outer wall mounting structure according to claim 2, wherein the mounting bolt is an extremely low head bolt.

4. A fixing hole into which a fixing bolt is inserted is formed in the lower flange portion of the beam, and an insertion hole into which the fixing bolt is inserted is formed in the second plate portion. The outer wall mounting structure according to claim 2 or claim 3, wherein the insertion hole is a long hole elongated in the extending direction of the second plate portion.

5. The outer wall mounting structure according to claim 4, wherein the fixing bolt is inserted into the insertion hole and the fixing hole from below, and a nut is fastened above the lower flange portion.

6.

7.

8. The horizontal portion of the outer wall member protrudes from the lower end of the vertical portion so that a part of the lower flange portion overlaps the upper side. The fixing hole is formed in the lower flange portion at a position where the horizontal portion does not overlap. The outer wall mounting structure according to claim 5, wherein the second plate portion extends in the horizontal direction more than the lower flange portion, and an insertion hole is formed at a position overlapping the fixing hole.

7. The outer wall mounting structure according to any one of claims 1 to 6, wherein the beam is a reinforcing beam formed by fixing a steel shape formed in an upside-down T shape to the lower surface of an H-shaped steel.

8. A construction method of the outer wall mounting structure according to any one of claims 1 to 7, comprising: a step of attaching the first plate portion of the outer wall mounting fitting to the indoor side surface of the vertical portion of the outer wall member; a step of sandwiching and holding the lower flange portion of the beam between the locking arm portion and the second plate portion of the outer wall mounting fitting to which the outer wall member is attached; a step of fixing the lower flange portion and the second plate portion; A construction method of an outer wall mounting structure, characterized by comprising the above steps.

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