Method for attaching fastening metal fitting

Abstract

To provide a method for attaching a fastening metal fitting, which can easily perform the work of attaching the fastening metal fitting.SOLUTION: The method for attaching a fastening metal fitting is a method for attaching a fastening metal fitting 1, which holds temporary scaffolding S to be installed outside the exterior wall, to the exterior wall (exterior wall panel B1) of a building. The method includes a pilot hole forming step of forming pilot holes on the surface of the exterior wall, and a metal fitting attachment step of attaching the fastening metal fitting 1 at a position corresponding to the pilot hole formed on the surface of the exterior wall. In the pilot hole forming step, a pilot hole is formed so as to penetrate at least the surface material that constitutes the surface of the exterior wall. In the metal fitting attachment step, a fastening screw is driven along the pilot hole, and the fastening metal fitting 1 is attached on the surface of the exterior wall by the fastening screw.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a method for attaching a connecting fitting, and more particularly to a method for attaching a connecting fitting for holding a temporary structure installed outside the outer wall of a building to the outer wall of the building.

Background Art

[0002] Conventionally, during the construction or repair (retrofitting) of a building, temporary structures such as temporary scaffolds and temporary handrails are installed for performing construction work from the outdoor side. At this time, in order to stabilize the temporary structure installed outside the building's frame, a connecting fitting for connecting the building's frame and the temporary structure is used (see, for example, Patent Documents 1 and 2). Note that the connecting fitting may be directly attached to the temporary structure or may be attached to a connecting member that holds the temporary structure.

[0003] The connecting fitting of Patent Document 1 is fixed to the surface of the outer wall panel to hold the temporary scaffold and is connected to a connecting member fixed to the temporary scaffold. Further, after the completion of the construction or repair of the building, the connecting fitting is covered with a cover material to ensure the designability of the building. The guide jig of the connecting fitting of Patent Document 2 is a guide jig for fixing the connecting fitting to the surface of the outer wall panel. By using the guide jig, even a person who is not used to the work can perform the work of fixing the connecting fitting to the surface of the outer wall panel.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, when attaching the connecting fitting to the surface of the outer wall (outer wall panel), depending on the type and thickness of the outer wall, it may not be possible to suitably attach the connecting fitting. Also, depending on the type and size of the building, the attachment position of the connecting fitting may vary. Even in such cases, it has been required that the attachment work can be suitably performed.

[0006] An object of the present invention is to provide a method for attaching a connecting fitting that can perform the attachment work of the connecting fitting more easily than before. Another object of the present invention is to provide a method for attaching a connecting fitting that can suitably perform the attachment work of the connecting fitting by using a guide jig.

Means for Solving the Problems

[0007] The above problems are solved by a method for attaching a connecting fitting according to the present invention, which is a method for attaching a connecting fitting that holds a temporary structure installed outside the outer wall to the outer wall of a building, the method including: a pilot hole forming step of forming a pilot hole in the surface of the outer wall; and a fitting attachment step of attaching the connecting fitting at a position corresponding to the pilot hole formed in the surface of the outer wall, wherein in the pilot hole forming step, the pilot hole is formed so as to at least penetrate a facing material constituting the surface of the outer wall, and in the fitting attachment step, a fastening member is driven along the pilot hole, and the connecting fitting is attached to the surface of the outer wall by the fastening member. With the above configuration, it is possible to realize a method for attaching a connecting fitting that can perform the attachment work of the connecting fitting more easily than before. Specifically, in the above method, after forming a pilot hole so as to at least penetrate a facing material constituting the surface of the outer wall, a fastening member is driven along the pilot hole, and the connecting fitting is attached to the surface of the outer wall by the fastening member. Therefore, regardless of the type and thickness of the outer wall, the fastening member of the connecting fitting can be suitably driven in. If a pilot hole is not formed on the surface of the outer wall, the cutting powder (shavings) of the facing material of the outer wall may get caught on the tip or thread (thread groove) of the fastening member, causing a load on the facing material and resulting in cracking. Also, the fastening member may stop advancing in the fastening direction, or the tip of the fastening member may break off.

[0008] At this time, the outer wall is an outer wall panel having the facing material, a heat insulating member disposed on the back side of the facing material, and a frame disposed on the back side of the heat insulating member. In the pilot hole forming step, the pilot hole is formed so as to penetrate the facing material and the heat insulating member of the outer wall panel. In the fitting attachment step, a fastening screw as the fastening member is driven along the pilot hole, and the fastening screw is fastened so as to penetrate the facing material, the heat insulating member, and the frame. With the above configuration, the connecting fitting can be easily attached to the surface of the outer wall panel. In particular, by forming a pilot hole so as to penetrate the facing material and the heat insulating member of the outer wall panel, it is possible to prevent the cutting powder of the facing material from getting caught on the tip or thread of the fastening screw, and to prevent the heat insulating member from being wound around. Also, as described above, by fastening the fastening screw to the facing material, the heat insulating member, and the frame of the outer wall panel, the connecting fitting can be firmly fixed.

[0009] At this time, the outer wall panel is disposed between the facing material and the heat insulating member, and further has a base member for ensuring air permeability. In the pilot hole forming step, the pilot hole is formed so as to penetrate the facing material, the base member, and the heat insulating member of the outer wall panel. In the fitting attachment step, the fastening screw is fastened so as to penetrate the facing material, the base member, the heat insulating member, and the frame. As described above, by forming a pilot hole targeting the base member of the outer wall panel and fastening the fastening screw to the facing material, the base member, the heat insulating member, and the frame of the outer wall panel, the connecting fitting can be fixed more firmly.

[0010] At this time, it is preferable to further include a cutting powder removing step of removing the cutting powder formed by penetrating the facing material from the lower hole and / or around the lower hole after the lower hole forming step and before the fitting attaching step. With the above configuration, the fastening member of the connecting fitting can be suitably driven in regardless of the type and thickness of the facing material of the outer wall.

[0011] At this time, the fastening member is a fastening screw having a screw on the surface of the fastening member. In the lower hole forming step, it is preferable to form the lower hole having an outer diameter of 80 to 88% of the outer diameter of the screw of the fastening screw on the surface of the outer wall. With the above configuration, the fastening member can be suitably driven in along the lower hole.

[0012] At this time, before the lower hole forming step, a jig attaching step of attaching a guide jig for positioning the connecting fitting to the surface of the outer wall, and before the lower hole forming step, a fitting arranging step of arranging the connecting fitting on the surface of the outer wall in a state of being held by the guide jig are further included. In the lower hole forming step, it is preferable to form the lower hole in a surface portion of the surface of the outer wall corresponding to the screw insertion hole of the connecting fitting positioned on the surface of the outer wall. With the above configuration, the connecting fitting can be easily positioned on the surface of the outer wall by using the guide jig. Also, by using the guide jig (by using the screw insertion hole of the connecting fitting held by the guide jig), the lower hole can be accurately formed on the surface of the outer wall.

[0013] At this time, the guide jig has a base portion disposed on the surface of the outer wall, and an insertion portion that protrudes from the back surface of the base portion toward the outer wall and is inserted into the joint between the outer walls arranged in the frontage direction or the vertical direction of the building. On the surface of the base portion, a holding hole is formed that penetrates from the surface of the base portion to the back surface and has a size through which the connecting fitting can pass. In the jig attachment step, the insertion portion of the guide jig is inserted into the joint, and in the fitting arrangement step, the connecting fitting is arranged inside the holding hole of the guide jig. In the pilot hole forming step, it is preferable to form the pilot hole using the holding hole of the guide jig and the screw insertion hole of the connecting fitting as guide holes. With the above configuration, it is possible to easily perform the work of attaching the connecting fitting by using a guide jig having a simpler shape than before. Also, with the above configuration, it is possible to suitably form a pilot hole on the surface of the outer wall using the holding hole of the guide jig and the screw insertion hole of the connecting fitting as guide holes.

Effect of the Invention

[0014] According to the method for attaching the connecting fitting of the present invention, it is possible to perform the work of attaching the connecting fitting more easily than before. Also, it is possible to easily perform the work of attaching the connecting fitting by using a guide jig.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 8

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Figure 10

Figure 11

Mode for Carrying Out the Invention

[0016] Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 11. This embodiment relates to a "method for attaching a connecting fitting" that enables easy attachment work of a connecting fitting. First, the connecting fitting and the guide jig will be described, and then the method for attaching the connecting fitting will be described.

[0017] <Use of the Connecting Fitting> As shown in FIG. 1, the connecting fitting 1 is a connecting fitting attached to the surface of the outer wall panel B1 that constitutes the building frame B, and is used to hold the temporary scaffold S installed outside the frame B. In addition to being used to hold the temporary scaffold S, the connecting fitting 1 may also be used to hold a temporary structure for preventing falls, such as a temporary handrail.

[0018] Note that as shown in FIGS. 1, 8, and 9, the building frame B includes a plurality of outer wall panels B1, B2 (outer walls) arranged in the frontage direction and the vertical direction of the building, a joint B3 formed between the outer wall panels B1, B2, and columns B4 arranged inside the outer wall panels B1, B2. The outer wall panel B1 is a building panel installed facing the outside of the building. Specifically, as shown in FIGS. 8 and 9, the outer wall panel B1 includes a panel frame B1a having a U-shaped cross-section assembled in a rectangular frame shape, a heat insulating board B1b disposed on the surface of the panel frame B1a, a base member B1c disposed on the surface of the heat insulating board B1b, and a finishing surface material B1d disposed on the surface of the base member B1c. The base member B1c, also referred to as a body edge, is a member for ensuring air permeability and is arranged at intervals in the frontage direction of the building. A heat insulating material (for example, glass wool) is disposed in the region surrounded by the panel frame B1a.

[0019] A joint B3 (gap) is formed between the left and right outer wall panels B1 and B2 in consideration of expansion due to temperature changes and the like. After the construction work or repair work of the building is completed, the joint B3 will be filled with a joint material (for example, a sealing material or a dry gasket). In this embodiment, the connecting fitting 1 is fixed to the surface of the outer wall panel B1, but it is not particularly limited. The connecting fitting 1 may be fixed to the surface of a building panel installed facing the outside of the building. Specifically, the connecting fitting 1 may be fixed to the surface of the waist wall panel, or may be fixed to the surface of the eaves panel or the ceiling panel.

[0020] Also, as shown in FIG. 1, the connecting fitting 1 is connected to a connecting member S4 that holds the temporary scaffold S. The temporary scaffold S is a temporary structure used during the construction or repair of the building and is installed outside the building frame B. The temporary scaffold S includes a plurality of vertically long columns S1, a plurality of connecting members S2 that are bridged over adjacent columns S1 and extend in the building's overhang direction, and a plurality of scaffold boards S3 that are bridged over adjacent connecting members S2 and extend in the building's frontage direction. The connecting member S4 is a member used to hold the temporary scaffold S with respect to the building frame B. The connecting member S4 includes a connecting member S4a provided on the building body B side in the building's protruding width direction and connected to the connecting fitting 1, a telescopic member S4b extending from the connecting member S4a toward the temporary scaffold S side and being telescopically extendable, and a clamp S4c provided at the extending end of the telescopic member S4b and attached to the temporary scaffold S (support column S1).

[0021] Note that the connecting fitting 1 is connected to the connecting member S4 that holds the temporary scaffold S, but it is not particularly limited. It may be directly connected to the temporary scaffold S (for example, support column S1 or scaffold board S3) and directly hold the temporary scaffold S.

[0022] As described above, as shown in FIG. 1, the connecting fitting 1 is connected to the temporary scaffold S or the connecting member S4 fixed to the temporary scaffold S during the construction or repair of the building. After the construction work or repair work of the building is completed, as shown in FIG. 2, the connecting fitting 1 is covered with the cover material 40 to ensure the design property of the building.

[0023] <Configuration of the connecting fitting> As shown in FIGS. 3 to 6, the connecting fitting 1 includes an elliptical fitting main body 10, a water stop material 20 attached to the back surface of the fitting main body 10, fastening screws 30 for fixing the fitting main body 10, and a cover material 40 that covers the fitting main body 10 from the outside as shown in FIG. 2.

[0024] A connection hole 11 for connecting to the connecting member S4 (connecting member S4a) is formed at the central portion of the surface of the fitting main body 10. The connection hole 11 is capable of being screwed with the connecting member S4a (connection bolt) of the connecting member S4. In addition, screw insertion holes 12 for passing the fastening screws 30 are respectively formed at both end portions of the surface of the fitting main body 10 that sandwich the connection hole 11. Screw insertion holes 21 are also formed at portions of the water stop material 20 corresponding to the screw insertion holes 12.

[0025] As shown in FIG. 3, the waterstop material 20 is, for example, a rubber waterstop material that directly abuts against the surface of the outer wall panel B1 (finished surface material B1d). As shown in FIGS. 5, 8, and 9, the fastening screw 30 penetrates through the fitting body 10 and the waterstop material 20, further penetrates through the finished surface material B1d, the base member B1c, and the heat insulation board B1b of the outer wall panel B1, and is attached so as to reach the panel frame B1a. As shown in FIGS. 6 to 8, by fixing the connecting fitting 1 (fitting body 10, waterstop material 20, and fastening screw 30) to the surface of the outer wall panel B1, a temporary scaffold S (connecting member S4) can be connected to the building body B.

[0026] As shown in FIG. 2, the cover material 40 is a decorative cover for ensuring the design property of the outer wall panel B1, and is arranged so as to cover the fitting body 10, the waterstop material 20, and the fastening screw 30 from the outside. By doing so, after the construction work or repair work of the building is completed, the connecting fitting 1 can be made inconspicuous and the appearance of the building can be improved.

[0027] The connecting fitting 1 is fixed at a position spaced a predetermined distance from the joint B3 on the surface of the outer wall panel B1 of the building body B. For example, the connecting fitting 1 is fixed at an end position on the surface of the outer wall panel B1 closer to the joint B3 and corresponding to the panel frame B1a. As shown in FIGS. 1 and 2, the connecting fittings 1 are arranged at predetermined intervals along the vertical direction and the frontage direction of the building. More specifically, the plurality of connecting fittings 1 are arranged with their positions aligned in the vertical direction and their positions aligned in the frontage direction. Note that depending on the type and size of the building, the fixing positions of the connecting fittings 1 are different. That is, the separation positions from the joint B3 of the building are different. Even in such a case, by using the guide jig 101, the fixing positions of the connecting fittings 1 can be arbitrarily determined.

[0028] <Guide jig> As shown in FIGS. 3 to 5, the guide jig 101 is used to position and attach the connecting fitting 1 to the surface of the outer wall panel B1. Specifically, when the guide jig 101 is attached to the outer wall panel B1 and the connecting fitting 1 is housed inside the guide jig 101, the guide jig 101 holds the connecting fitting 1 in a state where the connecting fitting 1 faces the surface of the outer wall panel B1.

[0029] As shown in FIGS. 3 to 5 and FIG. 8, the guide jig 101 includes a base portion 110 disposed to face the surface of the outer wall panel B1, and a insertion portion 120 that protrudes from the back surface of the base portion 110 toward the outer wall panel B1 and is inserted into the joint B3 between the first outer wall panel B1 and the second outer wall panel B2. The base portion 110 and the insertion portion 120 are integrally formed from the same resin material. Note that the guide jig 101 may be manufactured by integral molding using a mold, or may be manufactured by cutting out a resin block.

[0030] The base portion 110 has a rectangular plate shape and extends longitudinally along the arrangement direction of the first outer wall panel B1 and the second outer wall panel B2. On the surface of the base portion 110, a holding hole 130 is formed that penetrates from the surface to the back surface of the base portion 110 and has a size through which the connecting fitting 1 can pass.

[0031] The insertion portion 120 has a rectangular plate shape and has a size that can be inserted into the joint B3. The insertion portion 120 is provided on the side of one end portion 111 in the extending direction of the base portion 110. Specifically, the insertion portion 120 is disposed at a position slightly inside the one end portion 111 in the extending direction of the base portion 110. The insertion portion 120 extends so as to be orthogonal to the base portion 110. When the insertion portion 120 is inserted into the joint B3, it abuts against the first outer wall panel B1 and the second outer wall panel B2 and is attached.

[0032] The holding hole 130 has a size that allows the connecting fitting 1 to pass through, and is a through hole with an elliptical cross-section corresponding to the shape of the connecting fitting 1. The holding hole 130 is disposed on the other end portion 112 side rather than the insertion portion 120 in the extending direction of the base portion 110. A plurality of holding holes 130 are formed so as to be arranged along the extending direction of the base portion 110. Specifically, the holding hole 130 includes a first holding hole 131, a second holding hole 132, and a third holding hole 133.

[0033] The first holding hole 131 is formed on the one end portion 111 side in the extending direction of the base portion 110. The second holding hole 132 is formed on the other end portion 112 side rather than the first holding hole 131, and is arranged so as to partially overlap with the first holding hole 131. The third holding hole 133 is formed on the other end portion 112 side rather than the second holding hole 132, and is arranged at a distance from the second holding hole 132. These holding holes 131 to 133 are each arranged at a position separated by a predetermined distance from the position where the insertion portion 120 is provided in the extending direction of the base portion 110. By doing so, even when the fixing position of the connecting fitting 1, that is, the separation position from the joint B3, varies depending on the type and size of the building, it becomes a guide jig 101 that can cope with such a case. That is, by selecting any one of the plurality of holding holes 131 to 133, the fixing position of the connecting fitting 1 can be arbitrarily determined.

[0034] In the above configuration, as shown in FIGS. 3 and 4, the insertion portion 120 and the holding hole 130 are arranged so as to be aligned in the length direction of the base portion 110. And the length (vertical length) of the insertion portion 120 in the width direction of the base portion 110 is the same as the length (vertical length) of the holding hole 130 in the width direction of the base portion 110. By doing so, the size of the base portion 110 can be made more compact. That is, the size of the guide jig 101 can be made compact. Incidentally, the length of the insertion portion 120 may be shorter than the length of the holding hole 130.

[0035] In the above configuration, as shown in FIG. 3, when the guide jig 101 is attached to the housing B, the base portion 110 is disposed to face the surface of the first outer wall panel B1, and one end portion 111 of the base portion 110 is disposed to face the surface of the second outer wall panel B2 via the joint B3. By doing so, the base portion 110 is disposed to face not only the surface of the first outer wall panel B1 but also the surface of the second outer wall panel B2. Therefore, the base portion 110 can be stably disposed on the surface of the outer wall panel B1. That is, the guide jig 101 can be stably attached to the housing B.

[0036] With the above-described guide jig 101, the fixing operation of the connecting fitting 1 can be easily performed while having a simpler shape than before. Further, even when the fixing position of the connecting fitting 1 varies depending on the type and size of the building, the fixing operation of the connecting fitting 1 can be favorably performed.

[0037] <Method for attaching connecting fitting> Next, a method for attaching the connecting fitting will be described with reference to FIGS. 10 and 11. The method includes at least a “jig attachment step”, a “fitting arrangement step”, a “pilot hole formation step”, a “cutting powder removal step”, a “fitting attachment step”, a “jig removal step”, and a “scaffold connection step”. Details will be described below. In the construction of the building, description of construction steps other than the above will be omitted.

[0038] In the “jig attachment step”, an operator attaches the guide jig 101 to the surface of a predetermined portion of the outer wall panel B1 (S1 (Step 1)). Specifically, as shown in FIG. 3, the operator inserts the insertion portion 120 of the guide jig 101 into the joint B3 of the housing B and attaches it to the outer wall panel B1. At this time, the base portion 110 of the guide jig 101 is disposed to face the surface of the outer wall panel B1. When the guide jig 101 is attached to the outer wall panel B1, the operator does not have to hold the guide jig 101.

[0039] In the "metal fitting arrangement step", as shown in FIGS. 3 and 4, the operator arranges the connecting metal fitting 1 (metal fitting body 10) inside the holding hole 130 of the guide jig 101 (S2). At this time, the metal fitting body 10 is held by the guide jig 101 in a state facing the surface of the outer wall panel B1.

[0040] In the "pilot hole forming step", as shown in FIGS. 4 and 10, the operator forms a pilot hole H on the surface of the outer wall panel B1 (S3). Specifically, the operator forms the pilot hole H by using a tool T (driving tool) to penetrate the finish surface material B1d, the base member B1c, and the heat insulating board B1b of the outer wall panel B1. At this time, the operator may form the pilot hole H in the surface portion of the surface of the outer wall panel B1 corresponding to the screw insertion hole 12 of the connecting metal fitting 1. More specifically, it is preferable to form the pilot hole H using the holding hole 130 of the guide jig 101 and the screw insertion hole 12 of the connecting metal fitting 1 as guide holes.

[0041] When forming the pilot hole H, it is preferable to form a pilot hole H having an outer diameter of 80 to 88% of the outer diameter of the screw of the fastening screw 30. For example, if a pilot hole smaller than the above 80% outer diameter is formed, problems are likely to occur due to the influence of cutting powder. Also, if a pilot hole larger than the above 88% outer diameter is formed, it becomes difficult for the screw of the fastening screw to bite. Note that for the fastening screw 30 having an outer diameter of 5 mm, it is preferable to form a pilot hole H having an outer diameter of 4 to 4.4 mm, and preferably a pilot hole H having an outer diameter of 4.2 mm.

[0042] In the "cutting powder removal step", the operator removes the cutting powder formed by penetrating the finish surface material B1d during the formation of the pilot hole from the pilot hole and the periphery of the pilot hole (S4). Specifically, the operator removes the cutting powder (swarf) formed by the penetration of the finishing surface material B1d and the base member B1c from the counterbore, and also removes the fiber pieces formed by the penetration of the heat insulating board B1b from the counterbore. By doing so, if a counterbore is not formed on the surface of the outer wall panel B1, it is possible to prevent the cutting powder or fiber pieces from being caught by the tip (cutting edge) of the fastening screw 30 or the screw, and to prevent a load from being applied to the finishing surface material B1d. In addition, if cutting powder or the like accumulates on the thread of the fastening screw 30, the resistance increases when the fastening screw 30 is fastened, and for example, the fastening to the frame is hindered.

[0043] In the "metal fitting attachment step", as shown in FIGS. 5 and 6, with the metal fitting body 10 held by the guide jig 101, the operator drives the fastening screw 30 into the screw insertion hole 12 of the metal fitting body 10 (S5). For example, when the operator drives the fastening screw 30 using the tool T, the connecting metal fitting 1 and the guide jig 101 can be released from the hand and the work can be carried out. Specifically, the operator drives the fastening screw 30 along the pre-formed counterbore H, and attaches the connecting metal fitting to the surface of the outer wall panel B1 with the fastening screw 30. At this time, the operator fastens the fastening screw 30 so as to penetrate the finishing surface material B1d, the base member B1c, the heat insulating board B1b, and the panel frame B1a. By doing so, the connecting metal fitting 1 can be fixed more firmly.

[0044] In the "jig removal step", as shown in FIG. 6, the operator removes the guide jig 101 from the outer wall panel B1 (S6). Specifically, the operator can easily remove the guide jig 101 by pulling the guide jig 101 outward in the building width direction. After the guide jig 101 is removed, the connecting metal fitting 1 remains and is fixed to the surface of the outer wall panel B1.

[0045] In the "scaffold connection process", as shown in Fig. 7, an operator connects a connecting member S4 (connecting member S4a) to the connection hole 11 of the connecting fitting 1. Then, the operator connects the housing B and the temporary scaffold S via the connecting fitting 1 and the connecting member S4.

[0046] With the above connecting fitting attachment method, the attachment work of the connecting fitting can be performed more easily than before. Among the above S1 to S7, the "fixture attachment process" of S1 and the "fixture removal process" of S6 do not have to be performed.

[0047] <Other Embodiments> In the above embodiment, as shown in Figs. 4 and 10, an operator forms a pilot hole H so as to penetrate the finish surface material B1d, the base member B1c, and the heat insulation board B1b of the outer wall panel B1, but it is not particularly limited and can be changed. The operator may form a pilot hole so as to penetrate at least the finish surface material B1d. For example, a pilot hole may be formed only in the finish surface material B1d. A pilot hole may be formed from the finish surface material B1d to the panel frame B1a. Alternatively, a pilot hole may be formed avoiding the base member B1c.

[0048] In the above embodiment, as shown in Figs. 8 to 10, an operator fastens a fastening screw 30 so as to penetrate the finish surface material B1d, the base member B1c, the heat insulation board B1b, and the panel frame B1a, but it is not particularly limited. For example, the operator may fasten the fastening screw 30 so as to penetrate the outer wall having the finish surface material B1d and penetrate the housing frame located inside the outer wall (it is not necessary to assemble it to the panel frame of the outer wall panel). Examples of the housing frame include columns, beams, and metal fittings provided on columns or beams.

[0049] In the above embodiment, as shown in Figs. 4 and 5, the connecting fitting 1 is attached using the guide jig 101, but it is not particularly limited, and the guide jig 101 does not have to be used.

[0050] In the above-described embodiment, the method for attaching the connecting fitting according to the present invention has been mainly described. However, the above embodiment is merely an example for facilitating the understanding of the present invention, and does not limit the present invention. The present invention can be changed and improved without departing from its gist, and it goes without saying that equivalents thereof are included in the present invention.

Explanation of Signs

[0051] B Building body (building body) B1 Outer wall panel (first outer wall panel, first outer wall) B1a Panel frame (frame) B1b Heat insulation board (heat insulation member) B1c Base member B1d Finishing surface material (surface material) B1e Heat insulating material (heat insulating wool) B2 Second outer wall panel (second outer wall) B2d Finishing surface material (surface material) B3 Joint (gap) B4 Column S Temporary scaffold (temporary structure) S1 Support column S2 Connecting member S3 Scaffold board S4 Connecting member S4a Connection member S4b Telescopic member S4c Clamp 1 Connecting fitting 10 Fitting body 11 Connection hole 12 Screw insertion hole 20 Waterproof material 21 Screw insertion hole 30 Fastening screw (fastening member) 40 Cover material 101 Guide jig 110 Base part 111 One end part 112 The other end part 120 Insertion part 130 Holding hole 131 First holding hole 132 Second holding hole 133 Third holding hole T Tool H Lower hole

Claims

1. A method for attaching a connecting fitting for holding a temporary structure installed outside the outer wall to the outer wall of a building, the method comprising: a step of forming a pilot hole on the surface of the outer wall; a step of attaching the connecting fitting at a position corresponding to the pilot hole formed on the surface of the outer wall, wherein, in the step of forming the pilot hole, the pilot hole is formed so as to penetrate at least the facing material constituting the surface of the outer wall; and in the step of attaching the fitting, a fastening member is driven along the pilot hole, and the connecting fitting is attached to the surface of the outer wall by the fastening member.

2. The outer wall is an outer wall panel having the facing material, a heat insulating member disposed on the back side of the facing material, and a frame disposed on the back side of the heat insulating member, wherein, in the step of forming the pilot hole, the pilot hole is formed so as to penetrate the facing material and the heat insulating member of the outer wall panel; and in the step of attaching the fitting, a fastening screw as the fastening member is driven along the pilot hole, and the fastening screw is fastened so as to penetrate the facing material, the heat insulating member, and the frame. The method for attaching a connecting fitting according to claim 1.

3. The outer wall panel is further provided with a base member disposed between the facing material and the heat insulating member for ensuring air permeability, wherein, in the step of forming the pilot hole, the pilot hole is formed so as to penetrate the facing material, the base member, and the heat insulating member of the outer wall panel; and in the step of attaching the fitting, the fastening screw is fastened so as to penetrate the facing material, the base member, the heat insulating member, and the frame. The method for attaching a connecting fitting according to claim 2.

4. The method for attaching a connecting fitting according to any one of claims 1 to 3, further comprising a step of removing cutting powder formed by penetrating the facing material from the pilot hole and / or around the pilot hole after the step of forming the pilot hole and before the step of attaching the fitting.

5. The fastening member is a fastening screw having a screw on the surface thereof, wherein, in the step of forming the pilot hole, the pilot hole having an outer diameter of 80 to 88% of the outer diameter of the screw of the fastening screw is formed on the surface of the outer wall. The method for attaching a connecting fitting according to any one of claims 1 to 3.

6. Before the step of forming the lower hole, a jig attachment step of attaching a guide jig for positioning the connecting fitting to the surface of the outer wall; Before the step of forming the lower hole, a fitting arrangement step of arranging the connecting fitting on the surface of the outer wall in a state of being held by the guide jig; and further includes, In the step of forming the lower hole, a lower hole is formed in a surface portion of the surface of the outer wall corresponding to the screw insertion hole of the connecting fitting positioned on the surface of the outer wall. The method for attaching a connecting fitting according to any one of claims 1 to 3, characterized in that.

7. The guide jig has a base portion disposed on the surface of the outer wall, and a plug-in portion that protrudes from the back surface of the base portion toward the outer wall and is inserted into a joint between the outer walls arranged in the building frontage direction or the vertical direction. On the surface of the base portion, a holding hole is formed that penetrates from the surface of the base portion to the back surface and has a size through which the connecting fitting can pass. In the jig attachment step, the plug-in portion of the guide jig is inserted into the joint. In the fitting arrangement step, the connecting fitting is arranged inside the holding hole of the guide jig. In the step of forming the lower hole, the lower hole is formed using the holding hole of the guide jig and the screw insertion hole of the connecting fitting as guide holes. The method for attaching a connecting fitting according to claim 6, characterized in that.

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