Exterior wall repair method

Abstract

To provide an exterior wall repair method that improves workability during exterior wall repair operations on structures while enabling reduction of exterior wall repair costs.SOLUTION: Each dwelling unit (1) of a structure (100) is provided with a balcony (2) protruding horizontally outward from an exterior wall (10). An exterior wall repair method for repairing the exterior wall (10) of the structure (100) comprises the steps of: attaching at least one fixing member (30) to the exterior wall (10) of the dwelling unit (1) to be repaired; installing an elevated work platform (20) on a floor surface (6) of the balcony (2) of the dwelling unit (1) to be repaired; fixing the elevated work platform (20) to the exterior wall (10) by connecting the elevated work platform (20) installed on the floor surface (6) to the at least one fixing member (30); and repairing the exterior wall (10) from atop the elevated work platform (20).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an exterior wall repair method for repairing the exterior wall of a structure. [Background technology]

[0002] For example, Japanese Patent Application Laid-Open Publication No. 2010-203183 (Patent Document 1) discloses an exterior wall repair method for repairing the exterior walls of structures such as apartment buildings. In this exterior wall repair method, temporary scaffolding such as framework scaffolding is erected around the exterior walls of structures such as reinforced concrete (RC), aerated concrete (ALC), or steel-frame structures.

[0003] The temporary scaffolding is fixed to the exterior wall of the structure by connecting multiple fixing members that connect to the temporary scaffolding to anchors driven into the exterior wall of the structure.The assembled temporary scaffolding is then surrounded by a protective sheet to prevent the scattering of exterior wall paint and other materials while the exterior wall repair work is carried out. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-203183 Summary of the Invention [Problem to be solved by the invention]

[0005] In high-rise structures such as tower apartment buildings, ALC is widely used for exterior walls to reduce the weight of the structure. Because ALC has lower compressive strength than regular concrete, driving anchors into ALC can reduce the strength of the ALC and cause localized damage to the ALC. For this reason, several precautions have been established for driving anchors into ALC, and there are concerns that this could reduce workability when setting up temporary scaffolding.

[0006] In addition, because driving anchors into ALC requires advanced technical skills, the number of contractors who can undertake exterior wall repair work on high-rise structures will be limited, which raises concerns that the costs of exterior wall repair work will increase as a result.

[0007] The present disclosure has been made to solve such problems, and the purpose of the present disclosure is to provide an exterior wall repair method that can improve the workability in exterior wall repair work of a structure and enable a reduction in the cost of exterior wall repair work. [Means for solving the problem]

[0008] The exterior wall repair method according to the present disclosure is a method for repairing the exterior wall of a structure. Each dwelling unit in the structure has a balcony that protrudes horizontally from the exterior wall toward the outdoors. The exterior wall repair method includes the steps of attaching at least one fixing member to the exterior wall of the dwelling unit to be repaired, installing an aerial work platform on the floor of the balcony of the dwelling unit to be repaired, connecting the aerial work platform installed on the floor to the at least one fixing member to secure the aerial work platform to the exterior wall, and repairing the exterior wall from the aerial work platform. [Effects of the Invention]

[0009] According to the present disclosure, it is possible to improve the workability in repairing the exterior walls of structures and reduce the costs of repairing the exterior walls. [Brief explanation of the drawings]

[0010] [Figure 1] This is a vertical cross-sectional side view showing the general structure of the balconies of each dwelling unit in the structure. [Figure 2] 1 is a diagram illustrating an example of a fixing structure for a high-altitude work platform. FIG. [Figure 3] FIG. 10 is a diagram illustrating a method for stretching a protective sheet. [Figure 4] FIG. [Figure 5] 1 is a flowchart showing the steps of an exterior wall repair work method according to the present embodiment. [Figure 6] 1 is an example of a floor plan of each floor of a structure. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals, and description thereof will not be repeated.

[0012] First, an exterior wall repair method according to an embodiment of the present disclosure will be described with reference to Fig. 1. The exterior wall repair method according to this embodiment can be applied to exterior wall repair work of a multi-story structure such as an apartment building. In particular, it can be suitably applied to exterior wall repair work of a structure in which ALC is used for the exterior walls of each dwelling unit.

[0013] Fig. 1 is a longitudinal side view showing the schematic structure of a balcony of a dwelling unit 1 on one floor of a structure 100. As shown in Fig. 1, each dwelling unit 1 of the structure 100 is provided with a balcony 2 that protrudes horizontally from an exterior wall 10 toward the outdoors. The balcony 2 and the indoor living room are connected via windows to allow access.

[0014] The balcony 2 of each dwelling unit 1 is separated from the balcony 2 of the adjacent dwelling unit 1 by a partition (not shown). This allows the continuous balcony 2 to be shared by at least two or more dwelling units 1 on the same floor.

[0015] The balcony 2 has a floor 4, a handrail wall 12 surrounding the floor 4, and a handrail 14. A drain ditch 8 is provided on the handrail wall 12 side of the floor surface 6 of the floor 4. The floor surface 6 gently slopes from the exterior wall 10 towards the drain ditch 8 so that wastewater from the outdoor unit of an air conditioner and the like flows into the drain ditch 8. The surface of the floor 4 opposite the floor surface 6 becomes the ceiling 9 of the dwelling unit 1 on the lower floor.

[0016] The handrail wall 12 has a plurality of handrail posts erected at appropriate intervals along at least one side of the periphery of the floor 4, and wall materials attached to the handrail posts. Handrails 14 are attached to the upper ends of the handrail posts and the wall materials.

[0017] <High altitude work platform> When repairing the exterior wall 10 of the dwelling unit 1, an aerial work platform 20 is installed on the floor surface 6 of the balcony 2. The aerial work platform 20 assists the worker M in working at height when repairing the ceiling 9 and the side surface of the floor 4 of the dwelling unit 1 on the upper floor.

[0018] If the floor surface 6 slopes from the exterior wall 10 toward the drainage ditch 8, a board 18 is installed on the floor surface 6 to level the installation surface of the aerial work platform 20. The aerial work platform 20 is installed on the board 18. The weight of the aerial work platform 20 is less than the load-bearing capacity of the balcony 2.

[0019] The aerial work platform 20 is a portable aerial work platform that is carried onto the balcony 2 of the dwelling unit 1 to be repaired. After the exterior wall repair work is completed, the aerial work platform 20 is moved to the balcony 2 of the next dwelling unit 1 to be repaired.

[0020] The size of the aerial work platform 20 is not particularly limited as long as it can be installed on the floor surface 6 of the balcony 2 of each dwelling unit 1. The aerial work platform 20 may be a known type, such as a folding stepladder or a rechargeable aerial work platform that can be raised and lowered electrically.

[0021] 1, the aerial work platform 20 is a rechargeable aerial work platform. The aerial work platform 20 has a frame 21 that is generally rectangular in plan view, a deck 22 that carries and raises and lowers a worker M, and a scissor sling mechanism 23 that raises and lowers the deck 22 on the frame 21.

[0022] A plurality of wheels 24 are attached to the bottom surface of the frame 21 so that the aerial work platform 20 can be moved by pushing it by hand, etc. A locking mechanism for locking the wheels 24 is provided on the aerial work platform 20 so that the aerial work platform 20 does not move while the worker M is standing on the deck 22 performing exterior wall repair work.

[0023] Handrails 25 are provided around the deck 22 for the safety of the worker M. The worker M wears a safety belt, and the end of a wire 28 connected to the safety belt is engaged with the handrail 25 via a hook. The worker M on the deck 22 can operate the control panel 26 to drive the scissor sling mechanism 23 and raise or lower the deck 22.

[0024] At least one fixing member 30 for fixing the aerial work platform 20 to the exterior wall 10 is attached to the exterior wall 10 of the dwelling unit 1. Figure 2 is a diagram illustrating an example of a fixing structure for the aerial work platform 20.

[0025] 2, for example, a wall hook is used as the fixing member 30. The fixing member 30 has a flat plate portion 31 and an annular portion 33 standing upright from the plate portion 31. The plate portion 31 has a plurality of through holes 32 penetrating in the thickness direction. The screw members 34 are passed through the through holes 32 of the plate portion 31 and then screwed into the outer wall 10.

[0026] A torque wrench, torque driver, torque screwdriver, or the like can be used as a tool for fastening the screw member 34 into the exterior wall 10. These tools are configured to be able to measure and adjust the fastening torque. Therefore, by using these tools, the screw member 34 can be fastened with a predetermined appropriate torque, regardless of the skill level of the worker M.

[0027] When ALC is used for the exterior wall 10, a screw member for ALC (for example, an ALC anchor, an ALC biz, an ALC drive, etc.) is used as the screw member 34. By properly adjusting the tightening torque of the screw member 34 for ALC using the above-mentioned tool, even a worker with low skill can easily attach the fixing member 30 to the exterior wall 10.

[0028] By connecting the aerial work platform 20 to a fixing member 30 attached to the exterior wall 10, the aerial work platform 20 is fixed to the exterior wall 10. The connecting member 40 that connects the aerial work platform 20 and the fixing member 30 has, for example, a wire-like shape, one end of which is connected to at least one of the frame 21, deck 22 and handrail 25 of the aerial work platform 20, and the other end of which is connected to the fixing member 30.

[0029] The aerial work platform 20 may be firmly fixed to the exterior wall 10 so as to be immovable relative to the floor surface 6 of the balcony 2. Alternatively, the aerial work platform 20 may be fixed to the exterior wall 10 so as to be movable on the floor surface 6 of the balcony 2.

[0030] The number of fixing members 30 for fixing the aerial work platform 20 may be one or more. The shape of the fixing members 30 is not particularly limited as long as they can be attached to the exterior wall 10. The shape of the connecting member 40 is not particularly limited as long as they can connect the aerial work platform 20 and the fixing members 30.

[0031] As shown in FIG. 1 , the exterior wall 10 may further be fitted with at least one fixing member 30 for engaging a worker M to the exterior wall 10 so as to be able to move on the deck 22. For example, a wire-like connecting member 40 connected to a safety belt or safety vest of the worker M may be engaged with the fixing member 30. By engaging the worker M to the exterior wall 10, the safety of the worker M on the deck 22 can be further improved. The number of fixing members 30 for engaging the worker M to the exterior wall 10 may be one or more.

[0032] The worker M may carry a camera 80 for photographing the area to be repaired. In the example of FIG. 1, the camera 80 is configured to be worn on the head of the worker M and to photograph an image of the worker M's field of view. The camera 80 stores the photographed image data in a memory within the camera 80. Alternatively, the camera 80 may be configured to be communicatively connected to a management device that manages the structure 100 and to transmit the photographed image data to the management device. This makes it possible to remotely grasp the deterioration state of the exterior wall 10 and the work content of the worker M in real time.

[0033] <Protective Sheet> To prevent paint and dust from scattering and tools from falling during the exterior wall repair work, the balcony 2 of the dwelling unit 1 to be repaired is covered with a protective sheet 50. The protective sheet 50 is stretched from the balcony 2 of a dwelling unit 1 on a higher floor than the dwelling unit 1 to be repaired. The method of stretching the protective sheet 50 will be explained using Figure 3.

[0034] Figure 3 is a side view that schematically shows the exterior of the structure 100. Figure 3 schematically shows the balcony 2 of the dwelling unit 1 to be repaired, and the balconies 2 of the dwelling units 1 on the upper and lower floors of the dwelling unit 1.

[0035] As shown in Figure 1, an aerial work platform 20 is installed on a balcony 2 of a dwelling unit 1 to be repaired. The aerial work platform 20 is fixed to an exterior wall 10 of the dwelling unit 1 to be repaired.

[0036] The protective sheet 50 is stretched to cover the balcony 2 of at least one dwelling unit 1 on the floor to be repaired. Specifically, the protective sheet 50 is generally rectangular and has an upper end 52 and a lower end 54. The upper end 52 of the protective sheet 50 is attached to the balcony 2 of the dwelling unit 1 on a floor above the at least one dwelling unit 1 on the floor to be repaired. In the example of FIG. 3, a wire 56 attached to the upper end 52 of the protective sheet 50 is tied to the handrail 14 of the balcony 2 of the dwelling unit 1 on the upper floor. The lower end 54 of the protective sheet 50 is attached to the handrail 14 of the balcony 2 of the dwelling unit 1 on a floor below the floor to be repaired. In the example of FIG. 3, a wire 58 attached to the lower end 54 of the protective sheet 50 is tied to the handrail 14 of the balcony 2 of the dwelling unit 1 on the lower floor. There are no particular limitations on the method of attaching the upper end 52 and the lower end 54 of the protective sheet 50.

[0037] In the example of Figure 3, the upper end 52 of the protective sheet 50 is attached to the handrail 14 of the balcony 2 of the dwelling unit 1 that is one floor above the dwelling unit 1 to be repaired, and the lower end 54 of the protective sheet 50 is attached to the handrail 14 of the balcony 2 of the dwelling unit 1 that is one floor below the dwelling unit 1 to be repaired. However, this is not limited to this, and the upper end 52 of the protective sheet 50 may be attached to the handrail 14 of the balcony 2 of the dwelling unit 1 that is two or more floors above the dwelling unit 1 to be repaired, and the lower end 54 of the protective sheet 50 may be attached to the handrail 14 of the balcony 2 of the dwelling unit 1 that is two or more floors below the dwelling unit 1 to be repaired. In this case, the number of floors to be repaired will be two or more, and the dwelling units 1 to be repaired will be multiple dwelling units 1 on two or more floors to be repaired.

[0038] By attaching the upper end 52 and lower end 54 of the protective sheet 50 to the balcony 2, as shown in Figure 1, the gap between the balcony 2 of the dwelling unit 1 to be repaired and the protective sheet 50 may become narrow. In this case, there is a possibility that the protective sheet 50 may come into contact with the side of the floor 4 of the balcony 2 or the handrail wall 12 during the exterior wall repair work. To avoid this situation, a preventive member 60 is attached to the handrail 14 to prevent contact between the balcony 2 of the dwelling unit 1 to be repaired and the protective sheet 50.

[0039] The prevention member 60 is a flat plate having a substantially rectangular shape and has long and short sides. The prevention member 60 is placed on the handrail 14 so that its long side extends along the extension direction of the handrail 14. The length of the short side of the prevention member 60 is set to a length that prevents contact between the protective sheet 50 and the floor 4 and the handrail wall 12. The shape of the prevention member 60 is not particularly limited as long as it can be attached to the handrail 14. Furthermore, the position where the prevention member 60 is attached is not limited to the handrail 14, as long as it does not interfere with exterior wall repair work.

[0040] In this embodiment, by attaching the upper end 52 and lower end 54 of the protective sheet 50 to the balcony 2 of another dwelling unit 1 on the same floor or another dwelling unit 1 on a different floor, the protective sheet 50 can be moved horizontally and vertically along the exterior wall 10 of the structure 100. Figure 4 is a perspective view of the exterior of the structure 100. A method for moving the protective sheet 50 will be described using Figure 4.

[0041] In the example of Figure 4, protective sheet 50 is stretched so as to cover balconies 2 of two dwelling units 1 on the floor to be repaired. Upper ends 52 of protective sheet 50 are attached to handrails 14 of balconies 2 of two dwelling units 1 on floors above the two dwelling units 1 on the floor to be repaired, and lower ends 54 of protective sheet 50 are attached to handrails 14 of balconies 2 of two dwelling units 1 on floors below the two dwelling units 1 on the floor to be repaired.

[0042] When the exterior wall repair work on the two dwelling units 1 to be repaired is completed, worker M moves the protective sheet 50 to cover the balconies 2 of the next two dwelling units 1 to be repaired. In a certain situation, if the next repair targets are two dwelling units 1 on the same floor as the two dwelling units 1 in question, worker M moves the protective sheet 50 horizontally (in the direction of arrow A in the figure). Specifically, worker M removes the upper end 52 of the protective sheet 50 from the handrails 14 of the balconies 2 of the two current dwelling units 1 and replaces them with the handrails 14 of the balconies 2 of two other dwelling units 1 on the same floor as the two current dwelling units 1. Worker M also removes the lower end 54 of the protective sheet 50 from the handrails 14 of the balconies 2 of the two current dwelling units 1 and replaces them with the handrails 14 of the balconies 2 of two other dwelling units 1 on the same floor as the two current dwelling units 1.

[0043] In another situation, if the next repair targets are two dwelling units 1 on the floors below the two dwelling units 1 for which exterior wall repair work has been performed, worker M moves protective sheet 50 vertically (in the direction of arrow B in the figure). Specifically, worker M removes upper end 52 of protective sheet 50 from handrails 14 of balconies 2 of the two current dwelling units 1 and reattaches it to handrails 14 of balconies 2 of two other dwelling units 1 on the floors below those two dwelling units 1. Worker M also removes lower end 54 of protective sheet 50 from handrails 14 of balconies 2 of the two current dwelling units 1 and reattaches it to handrails 14 of balconies 2 of two other dwelling units 1 on the floors below those two dwelling units 1.

[0044] In this way, the balcony 2 of each dwelling unit 1 of the structure 100 is covered with the protective sheet 50 during the period when the exterior wall repair work is being carried out on at least one dwelling unit 1, including that dwelling unit 1, but the balcony 2 is left open before and after the exterior wall repair work is carried out. This makes it possible to shorten the period during which the balcony 2 of each dwelling unit 1 is covered with the protective sheet 50, compared to the conventional technology in which the entire temporary scaffolding is covered with the protective sheet.

[0045] Therefore, the protective sheet 50 shortens the period during which sunlight and ventilation inside the rooms of each dwelling unit 1 are reduced, thereby improving the comfort of the residents of each dwelling unit 1. In addition, the protective sheet 50 shortens the period during which it is easy for suspicious persons to enter the balcony 2, thereby improving the safety of the residents of each dwelling unit 1.

[0046] <Exterior wall repair work method> Next, the procedure of the external wall repair work method according to the present embodiment will be described with reference to the flowchart of FIG.

[0047] As shown in Figure 5, the first step S01 is to carry in an aerial work platform 20 onto the balcony 2 of the floor to be repaired. Figure 6 is an example of a floor plan of each floor of a structure 100. In the example of Figure 6, the balconies 2 on each floor are continuous, and the balconies 2 of each dwelling unit 1 are separated by partition boards 70. The partition boards 70 are usually fixed to the balcony 2 using screw members to the exterior wall 10 and the handrail wall 12. The partition boards 70 can be easily removed from the balcony 2 by removing the screw members.

[0048] An emergency door 72 leading to the balcony 2 on each floor is provided in the common corridor 110 of each floor. In step S01, the aerial work platform 20 is carried into the balcony 2 through this emergency door 72. If an emergency door 72 is not provided on each floor, the aerial work platform 20 may be carried into the balcony 2 through the interior of one of the dwelling units 1.

[0049] Next, step S02 is carried out, in which protective sheet 50 is stretched. In step S02, as shown in FIG. 3, protective sheet 50 is stretched so as to cover balcony 2 of at least one dwelling unit 1 on the floor to be repaired. An upper end 52 of protective sheet 50 is attached to handrail 14 of balcony 2 of at least one dwelling unit 1 on a floor above at least one dwelling unit 1 on the floor to be repaired. A lower end 54 of protective sheet 50 is attached to handrail 14 of balcony 2 of at least one dwelling unit 1 on a floor below at least one dwelling unit 1 on the floor to be repaired. In step S02, a preventive member 60 is attached to handrail 14 of balcony 2 of dwelling unit 1 on the floor to be repaired.

[0050] Next, in step S03, a step of attaching fixing members 30 to the exterior wall 10 of the dwelling unit 1 to be repaired is carried out. In step S02, as shown in Figures 1 and 2, at least one fixing member 30 is attached to the exterior wall 10 with a screw member 34. If ALC is used for the exterior wall 10, the screw member 34 for ALC is fastened to the exterior wall 10 using a tool capable of adjusting the fastening torque, such as a torque driver.

[0051] Next, in step S04, a step of installing an aerial work platform 20 on the balcony 2 of the dwelling unit 1 to be repaired is carried out. In step S04, as shown in Fig. 1, the aerial work platform 20 is installed on the floor surface 6 of the balcony 2 via a board 18. If the floor surface 6 is level, the aerial work platform 20 may be set directly on the floor surface 6 without the board 18.

[0052] Next, in step S05, a step of fixing the aerial work platform 20 installed on the floor surface 6 to the exterior wall 10 is carried out. In step S05, as shown in FIG. 1 , the aerial work platform 20 is connected to at least one fixing member 30 attached to the exterior wall 10. The aerial work platform 20 may be firmly fixed to the exterior wall 10 so as to not move on the floor surface 6 of the balcony 2, or may be fixed to the exterior wall 10 so as to be movable on the floor surface 6.

[0053] Next, in step S06, a step of engaging the worker M with the exterior wall 10 is performed. In step S06, the worker M is engaged with the exterior wall 10 by connecting the worker M to at least one fixing member 30 attached to the exterior wall 10.

[0054] Next, in step S07, a step of repairing the exterior wall 10 is carried out from the aerial work platform 20. In step S07, a camera 80 attached to the head of the worker M on the aerial work platform 20 may capture an image of the field of view of the worker M. The camera 80 may transmit image data capturing the deterioration state of the exterior wall 10 and the work content of the worker M to a management device.

[0055] Next, in step S08, a step of removing the aerial work platform 20 from the fixing member 30 is carried out. Step S08 is carried out after the exterior wall repair work at a high altitude is completed and the worker M descends from the deck 22 of the aerial work platform 20. In step S08, the worker M is also removed from the fixing member 30.

[0056] Next, in step S09, a check is performed to determine whether the exterior wall repair work has been completed for all dwelling units 1 on the floor to be repaired. If the exterior wall repair work has not been completed for all dwelling units 1 on the floor to be repaired (NO in step S09), step S10 is performed to move the protective sheet 50. In step S10, as shown in FIG. 4, the protective sheet 50 is moved horizontally (in the direction of arrow A) so as to cover the balcony 2 of at least one dwelling unit 1 on the floor to be repaired next. Specifically, the upper end 52 of the protective sheet 50 is attached to the handrail 14 of the balcony 2 of the dwelling unit 1 on a floor above the at least one other dwelling unit 1, and the lower end 54 of the protective sheet 50 is attached to the handrail 14 of the balcony 2 of the dwelling unit 1 on a floor below the at least one other dwelling unit 1. If the balcony 2 of the dwelling unit 1 to be repaired next is already covered with the protective sheet 50, step S10 can be skipped.

[0057] Next, in step S11, the aerial work platform 20 is moved to the balcony 2 of the next dwelling unit 1 to be repaired. In step S11, the partition plate 70 is removed, and the aerial work platform 20 is moved to the balcony 2 of the next dwelling unit 1 to be repaired. The arrows in FIG. 6 show an example of the movement route of the aerial work platform 20 on the floor to be repaired. In the example of FIG. 6, each time the exterior wall repair work on the dwelling unit 1 to be repaired is completed, the partition plate 70 on the balcony 2 of that dwelling unit 1 is removed, and the aerial work platform 20 is moved to the balcony 2 of the adjacent dwelling unit 1, thereby completing the exterior wall repair work on all dwelling units 1 on the floor to be repaired. After step S11 is performed, the process returns to step S03, and the exterior wall repair work on the next dwelling unit 1 to be repaired is carried out.

[0058] When the exterior wall repair work for all of the dwelling units 1 on the floor to be repaired is completed (YES in S09), step S12 is carried out, in which the aerial work platform 20 is carried out from the balcony 2 on the floor to be repaired.

[0059] Next, in step S13, a step is carried out to confirm whether or not the exterior wall repair work has been completed for all dwelling units 1 on all floors of the structure 100. If the exterior wall repair work has not been completed for all dwelling units 1 on all floors (NO in S13), the process returns to step S01, and the aerial work platform 20 is carried in to the balcony 2 on the next floor to be repaired. Then, in steps S02 to S11, the exterior wall repair work is carried out for each dwelling unit 1 on the next floor to be repaired.

[0060] When the repair work on the exterior walls of all the dwelling units 1 on all the floors has been completed (YES in S13), the repair work on the exterior walls of the structure 100 is completed.

[0061] <Effects> In the exterior wall repair work method according to this embodiment, an aerial work platform is installed on the floor of the balcony of the dwelling unit to be repaired, and the exterior wall repair work is carried out using this aerial work platform. Therefore, the process of assembling temporary scaffolding such as framework scaffolding around the exterior wall of the structure is not required.

[0062] Conventionally, in the process of assembling temporary scaffolding, anchors are driven into the exterior wall of the structure to secure the scaffolding to the structure. When ALC is used for the exterior wall of the structure, advanced techniques are required to drive the anchors, which reduces the workability when setting up the temporary scaffolding and raises concerns about rising exterior wall repair costs. As described above, according to this embodiment, the process of assembling the temporary scaffolding is unnecessary, thereby improving the workability of exterior wall repair work. Furthermore, it is possible to suppress the rise in exterior wall repair costs. This effect can be particularly noticeable in high-rise structures such as tower apartment buildings, where ALC is used extensively for the exterior walls.

[0063] In the exterior wall repair work method according to this embodiment, a step of attaching fixing members to the exterior wall is carried out in order to secure an aerial work platform to the exterior wall of the dwelling unit to be repaired. If ALC is used for the exterior wall, this step is carried out using screws for ALC and a tool that can adjust the tightening torque of the screws, so that the fixing members can be easily attached to the exterior wall regardless of the worker's level of skill.

[0064] In the exterior wall repair work method according to this embodiment, the worker engages with the exterior wall of the dwelling unit to be repaired, so the safety of the worker working at height can be ensured.

[0065] In the exterior wall repair work method according to this embodiment, a protective sheet is stretched over the balcony of at least one dwelling unit on the floor to be repaired. Therefore, compared to the conventional technique of covering temporary scaffolding with a protective sheet, the period during which the balconies of each dwelling unit are covered with the protective sheet can be shortened. This makes it possible to improve the comfort and safety of the residents of each dwelling unit during the exterior wall repair work period of the structure.

[0066] In addition, in the exterior wall repair work method according to this embodiment, protective sheets are stretched over the balconies of the dwelling units on the upper and lower floors of the dwelling unit to be repaired, which allows the protective sheets to be easily moved each time the exterior wall repair work for each dwelling unit is completed.

[0067] <Modification> (1) In the above-described embodiment, the aerial work platform 20 is fixed to the exterior wall 10 of the dwelling unit 1 to be repaired, and a configuration is described in which a worker M on the deck 22 of the aerial work platform 20 engages with the exterior wall 10. However, depending on the nature of the work at height, a configuration in which another worker on the balcony 2 pulls the end of a wire connected to the worker M's safety belt or the like may be added. For example, in a situation in which a worker M on the deck 22 leans his or her upper body over the handrail wall 12 to perform repair work around the ceiling 9, the safety of the worker M can be further improved by having another worker pull the worker M toward the exterior wall 10.

[0068] (2) The fixing members 30 attached to the exterior walls 10 of each dwelling unit 1 can be left attached to the exterior walls 10 without being removed after the exterior wall repair work is completed. This allows the step of attaching the fixing members 30 (S03 in FIG. 5) to be omitted during the next exterior wall repair work. Furthermore, in the event of a disaster, the fixing members 30 can also be used as members for engaging evacuation wires, etc.

[0069] (3) The exterior wall repair work method according to this embodiment may be used in combination with a conventional exterior wall repair work method using temporary scaffolding. For example, the exterior wall repair work method according to this embodiment may be applied to the upper floors of the structure 100 where ALC is used for the exterior walls 10, and the conventional exterior wall repair work method may be applied to the lower floors where concrete is used for the exterior walls 10.

[0070] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The technical scope of the present disclosure is defined by the claims, not by the description of the above embodiments, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0071] 1 dwelling unit, 2 balcony, 4 floor, 6 floor surface, 8 drainage ditch, 9 ceiling, 10 exterior wall, 12 handrail wall, 14, 25 handrail, 20 aerial work platform, 21 frame, 22 deck, 23 scissor sling mechanism, 24 wheel, 26 control panel, 28, 56, 58 wire, 30 fixing member, 31 plate part, 32 through hole, 33 ring part, 34 screw member, 40 connecting member, 50 protective sheet, 60 prevention member, 70 partition board, 72 emergency door, 80 camera, 100 structure, 110 common corridor, M worker.

Claims

1. An exterior wall repair method for repairing an exterior wall of a structure, comprising: Each dwelling unit of the structure is provided with a balcony that protrudes horizontally from the exterior wall toward the outdoors, attaching at least one fastening member to the exterior wall of the dwelling unit to be repaired; A step of installing an aerial work platform on the floor surface of the balcony of the dwelling unit to be repaired; a step of connecting the aerial work platform installed on the floor surface to the at least one fixing member, thereby fixing the aerial work platform to the exterior wall; and repairing the exterior wall from the elevated work platform.

2. The method further includes a step of stretching a protective sheet to cover the balcony of at least one dwelling unit on the floor to be repaired, The step of stretching the curing sheet includes: A step of fixing an upper end of the protective sheet to the balcony of at least one dwelling unit on a floor above the at least one dwelling unit on the floor to be repaired; 2. An exterior wall repair method according to claim 1, further comprising a step of fixing the lower end of the protective sheet to the balcony of at least one dwelling unit on a floor lower than the at least one dwelling unit on the floor to be repaired.

3. The step of stretching the curing sheet includes: Further comprising the step of moving the curing sheet after the step of repairing the exterior wall of the at least one dwelling unit on the repair target floor is completed, 3. The exterior wall repair construction method according to claim 2, wherein the step of moving the protective sheet includes a step of attaching each of the upper and lower ends of the protective sheet to the balcony of at least one other dwelling unit on the same floor or at least one dwelling unit on a different floor.

4. 4. The exterior wall repair construction method according to claim 1, further comprising the step of engaging a worker on the aerial work platform with the exterior wall by connecting the worker to the at least one fixing member.

5. 4. The exterior wall repair construction method according to claim 1, wherein the step of attaching at least one fixing member includes a step of attaching each fixing member to the exterior wall with a screw member.

6. The balconies of each dwelling unit on the same floor of the structure are separated by partitions, 4. An exterior wall repair construction method according to claim 1, further comprising the step of removing the partition plate and moving the aerial work platform to the balcony of an adjacent dwelling unit after the step of repairing the exterior wall is completed.

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