Scaffolding structure for exterior wall construction

Abstract

To provide a scaffolding structure that is stably supported by overhang support members.SOLUTION: A scaffolding structure 30 for exterior wall construction which uses overhang support members 10 is installed above the height of a framework structure 53a of the first floor ceiling of a building 50 without using temporary shoring or temporary scaffolding erected from a ground surface 52, and serves as scaffolding for work when constructing the exterior wall of the upper floors of the building 50. A single-pipe clamp 31d is attached to the tip of an overhang panel portion 12 via a clamp joint metal fitting 63, and a plurality of horizontal main single-pipe pipes 32 and a plurality of vertical single-pipe pipes 33 are attached via the single-pipe clamp 31d. Scaffolding boards 35 are fixed to the vertical single-pipe pipes 33 via scaffolding brackets 34, of the plurality of horizontal main single-pipe pipes 32 and the plurality of vertical single-pipe pipes 33 assembled together lengthwise and widthwise.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a scaffolding structure for exterior wall construction, and in particular to a temporary scaffolding structure using overhanging support members that can be installed without using temporary supports and temporary scaffolding erected from the ground surface, and that serves as a work scaffolding when constructing the exterior walls of the upper floors of a building. [Background technology]

[0002] For example, when constructing a reinforced concrete building, eaves are sometimes provided so as to protrude from the concrete exterior wall portion. Furthermore, when forming the eaves that protrude outward from the concrete exterior wall portion as a single unit with the exterior wall portion using cast-in-place concrete, since the eaves protrude in a cantilevered manner, if the eaves need to be provided at a considerable height, such as on the exterior wall portion of an upper floor of a building, it requires a lot of work to assemble the formwork for pouring the concrete and to install shoring to support the formwork.

[0003] For this reason, a technology has been developed in which concrete eaves are manufactured in advance as precast concrete products (PCa eaves) in a factory or the like, and then the manufactured PCa eaves are joined at the building construction site so that they protrude from the concrete exterior wall portion (see, for example, Patent Document 1). In the concrete joint structure described in Patent Document 1, the base end of the PCa eaves is inserted into a joint recess formed by an upper bearing surface and a lower bearing surface, which protrudes outward from the side of a beam made of cast-in-place concrete installed in the exterior wall portion of the building, and the joint is connected. The bending moment generated in the joint recess due to the weight of the PCa eaves or an external load applied to the PCa eaves is transmitted to the beam via the bearing pressure of the upper bearing surface and the lower bearing surface of the joint recess, thereby supporting the protruding PCa eaves. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-84888 Summary of the Invention [Problem to be solved by the invention]

[0005] In the concrete joint structure described in Patent Document 1, if the overhang length of the PCa eaves is increased, the bending moment loaded on the upper and lower bearing surfaces of the joint recess will increase, making it difficult to support the PCa eaves in a stable state. Therefore, the applicant of the present application proposes a technology in which a precast concrete product with an eaves portion is manufactured, preferably an overhang support member with an L-shaped or T-shaped cross section, which comprises an exterior wall panel portion and an overhang panel portion that overhangs laterally outward from the exterior wall panel portion, and at the building construction site, the exterior wall panel portion is joined to the outer end of the framework structure of the ceiling portion of the first floor and the outer end of the framework structure of the ceiling portion of any floor above this, thereby supporting the overhang support member on these framework structures, thereby making it possible to provide an eaves portion with a considerable overhang length using the overhang panel portion in a more stable state (see Figure 1).

[0006] On the other hand, when installing eaves at a building construction site using an overhang support member that has, for example, an L-shaped or T-shaped cross-section and that comprises an exterior wall panel portion and an overhang panel portion, if the overhang length of the overhang panel portion is large, it will be necessary to support the overhang support member from below with shoring or the like during installation.However, at work sites where it is difficult to erect temporary shoring or set up temporary scaffolding from the ground surface around the building to be constructed due to relationships with adjacent various equipment structures and other installed objects, or separately ordered exterior construction work, such overhang support members will have to be installed at a specified height position on the building without shoring or scaffolding.

[0007] Furthermore, if it were possible to install an overhang support member having, for example, an L-shaped or T-shaped cross-sectional shape, which comprises an exterior wall panel portion and an overhang panel portion, at a predetermined height of the building to be constructed without shoring or scaffolding, it would be possible to assemble temporary scaffolding for constructing the upper floors of the building by utilizing the overhang panel portion of the overhang support member installed without shoring or scaffolding.

[0008] The present invention aims to provide a scaffolding structure for exterior wall construction that uses overhang support members and can be installed without using temporary supports or temporary scaffolding erected from the ground surface. [Means for solving the problem]

[0009] The present invention provides a scaffolding structure for exterior wall construction using a protruding support member, which is installed above the height position of the first floor ceiling of the framework structure of a building without using temporary shoring and temporary scaffolding erected from the ground surface, and serves as a scaffolding for work when constructing the exterior wall of the upper floor of the building. The protruding support member is configured to include an exterior wall panel portion to be placed on the exterior wall of the building, and a protruding panel portion protruding laterally outward from the exterior wall panel portion, and on the rear side of the exterior wall panel portion opposite to the protruding panel portion, The engaging hardware that engages with the framework structure is attached to the tip of the protruding panel portion, and clamp joint hardware for attaching a single pipe clamp is attached to each end of the protruding panel portion. The engaging hardware attached to the exterior wall panel portion is engaged with the engaging portion provided on the framework structure of the building, so that the protruding support member is fixed and installed at the height of at least two ceiling portions: the outer end of the framework structure of the first floor ceiling portion and the outer end of the framework structure of the upper floor ceiling portion located one or two or more floors above that. The above-mentioned object is achieved by providing a scaffolding structure for exterior wall construction in which a plurality of single-pipe clamps fixed to the clamp joint hardware are attached to the tip portions of the overhang panel portions of each of the overhang support members, so that main horizontal single-pipe pipes are attached in at least two tiers spaced apart in the vertical direction, extending laterally along the tip portions and fixed thereto, and a plurality of vertical single-pipe pipes are attached upright and spaced apart in the horizontal direction by connecting them to the main horizontal single-pipe pipes attached in at least two tiers, one above the other, via single-pipe clamps. A plurality of scaffolding brackets are attached at a predetermined height position, supported by each of the vertical single-pipe pipes, so as to protrude toward the framework of the building. A scaffolding board is supported by the attached scaffolding brackets and installed at a predetermined height position, extending laterally in the region between the framework of the building and the pipe installation surface formed by the main horizontal single-pipe pipes and the vertical single-pipe pipes assembled together lengthwise and widthwise.

[0010] Furthermore, in the scaffolding structure for exterior wall construction of the present invention, it is preferable that in the area between the main horizontal single pipe attached to the tip portion of the protruding panel portion of the protruding support member on the lower floor and the main horizontal single pipe attached to the tip portion of the protruding panel portion of the protruding support member on the upper floor, one or more secondary horizontal single pipes are attached, extending horizontally, and connected to multiple vertical single pipes via single pipe clamps.

[0011] Furthermore, in the scaffolding structure for exterior wall construction of the present invention, it is preferable that the protruding panel portion constituting the protruding support member is joined as a single unit so as to be separable from the exterior wall panel portion, and that when the scaffolding structure for exterior wall construction is removed, the protruding panel portion can be separated from the exterior wall panel portion and removed.

[0012] Furthermore, in the scaffolding structure for exterior wall construction of the present invention, it is preferable that the vertical single-pipe pipes for self-weight reinforcement are connected to the horizontal secondary single-pipe pipes connected to them via single-pipe clamps on the frame structure side of the building, and are installed upright in the vertical direction with their lower ends abutting against the upper surface of the protruding panel portion of the protruding support member and supported.

[0013] Furthermore, it is preferable that the scaffolding structure for exterior wall construction of the present invention has a protective net stretched over the pipe installation surface, which is made up of a plurality of horizontal main single-pipe pipes and a plurality of vertical single-pipe pipes assembled together vertically and horizontally, on the side opposite the frame structure of the building. [Effects of the Invention]

[0014] According to the scaffolding structure for exterior wall construction of the present invention, it is possible to provide a scaffolding structure that can be installed without using temporary supports and temporary scaffolding erected from the ground surface, and that is supported in a stably state. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a schematic cross-sectional view along the vertical direction of a scaffolding structure for exterior wall construction according to a preferred embodiment of the present invention. [Figure 2] FIG. 1 is a perspective view of an example of a protruding support member, showing the protruding support member being lifted up by a wire member in a preferred method of installing the protruding support member. [Figure 3] FIG. 4 is a cross-sectional view of the protruding support member. [Figure 4] FIG. 10 is a cross-sectional view of another protruding support member. [Figure 5] 10A to 10C are explanatory diagrams of work steps in a preferred method for installing the overhang support member. [Figure 6] 10A to 10C are explanatory diagrams of work steps in a preferred method for installing the overhang support member. [Figure 7] 10A to 10C are explanatory diagrams of work steps in a preferred method for installing the overhang support member. [Figure 8] 10A to 10C are explanatory diagrams of work steps in a preferred method for installing the overhang support member. [Figure 9] FIG. 10 is an enlarged cross-sectional view illustrating the structure of the attachment portion of the overhang support member to the framework structure. [Figure 10] A side view showing an example of a single-pipe clamp that can be used to attach a horizontal main single-pipe to the tip portion of a protruding panel portion and to attach a vertical single-pipe to the horizontal main single-pipe. [Figure 11] 10 is a schematic cross-sectional view showing the structure of a protruding support member according to another embodiment of the present invention in the vicinity of a portion where the protruding support member is attached to a framework structure. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] In a scaffolding structure 30 for exterior wall construction according to a preferred embodiment of the present invention, an overhang support member 10' having a T-shaped cross section and an overhang support member 10 having an L-shaped cross section are used as overhang support members. Overhang support member 10' having a T-shaped cross section is attached to frame structure 53c of the third floor ceiling of building 50, and overhang support member 10 having an L-shaped cross section is attached to frame structure 53a of the first floor ceiling and frame structure 53b of the second floor ceiling of building 50.

[0017] The scaffolding structure 30 for exterior wall construction in this embodiment is a scaffolding structure for exterior wall construction that uses overhanging support members 10, 10', as shown in Figure 1, and is installed above the height position of the framework structure 53a of the first floor ceiling of the building 50 without using temporary supports or temporary scaffolding erected from the ground surface 52, and serves as a work scaffolding when constructing the exterior walls of the upper floors of the building 50.This scaffolding structure for exterior wall construction uses overhanging support members 10, 10'. The protruding support members 10, 10' are composed of exterior wall panel portions 11, 11' arranged on the exterior wall portion 51 of the building 50, and protruding panel portions 12, 12' protruding laterally outward from the exterior wall panel portions 11, 11', and on the back side of the exterior wall panel portions 11, 11' opposite the protruding panel portions 12, 12', engaging hardware 13, 14 (see Figure 9) that engages with the frame structures 53a, 53b, 53c of the building 50 is attached, and on the tip portions of the protruding panel portions 12, 12', insert hardware 63 is attached as a clamp connecting hardware for attaching a single pipe clamp. The protruding support members 10, 10' are fixed and installed at the height of at least two ceiling portions: the outer end of the framework structure 53a of the first floor ceiling portion and the outer end of the framework structures 53b, 53c of the upper floor ceiling portion located one or more floors above that, by engaging the engaging hardware 13, 14 attached to the exterior wall panel portions 11, 11' with engaging portions provided on the framework structures 53a, 53b, 53c of the building 50.

[0018] In addition, in the scaffolding structure 30 for exterior wall construction, the tip portions of each of the protruding panel portions 12, 12' of the installed protruding support members 10, 10' are engaged with a plurality of single-pipe clamps 31 fixed to clamp joint hardware 63 for attaching single-pipe clamps, so that the horizontal main single-pipe pipes 32 are attached in at least two tiers spaced apart in the vertical direction, each extending horizontally along the tip portion and fixed thereto, and a plurality of vertical single-pipe pipes 33 are attached upright and spaced apart in the horizontal direction by connecting them to the horizontal main single-pipe pipes 32 attached in at least two tiers, one above the other, via the single-pipe clamps 31. A plurality of scaffolding brackets 34 are attached at a predetermined height position, each supported by a plurality of vertical single pipes 33, so as to protrude toward the framework structures 53a, 53b, 53c of the building 50, and a scaffolding board 35 is supported by these attached scaffolding brackets 34 and installed extending horizontally at a predetermined height position in the area between the framework structures 53a, 53b, 53c of the building 50 and the pipe installation surface made up of a plurality of horizontal main single pipes 32 and a plurality of vertical single pipes 33 assembled together vertically and horizontally. The tip portions of each of the protruding panel portions 12, 12' of these installed protruding support members 10, 10' are engaged with a plurality of single-pipe clamps 31 fixed to insert hardware 63 as clamp joint hardware, so that the horizontal main single-pipe pipes 32 are attached in at least two rows (three rows in this embodiment) spaced apart in the vertical direction, each extending horizontally along the tip portion and fixed in place, and a plurality of vertical single-pipe pipes 33 are attached upright and spaced apart in the horizontal direction by connecting them to the horizontal main single-pipe pipes 32 attached in at least two rows, one above the other, via the single-pipe clamps 31. A plurality of scaffolding brackets 34 are attached at a predetermined height position, each supported by a plurality of vertical single pipes 33, so as to protrude toward the framework structures 53a, 53b, 53c of the building 50, and a scaffolding board 35 is supported by these attached scaffolding brackets 34 and installed extending horizontally at a predetermined height position in the area between the framework structures 53a, 53b, 53c of the building 50 and the pipe installation surface made up of a plurality of horizontal main single pipes 32 and a plurality of vertical single pipes 33 assembled together vertically and horizontally.

[0019] As a result, the scaffolding structure 30 of this embodiment can be installed without using temporary supports and temporary scaffolding erected from the ground surface, and is a structure that is stably supported by the overhanging support members 10, 10', and is preferably used as scaffolding when constructing the exterior walls of the upper floors of a building.

[0020] In this embodiment, the scaffolding structure 30 for exterior wall construction using the overhang support member has one or more horizontal secondary single pipes 36 attached to the area between the main horizontal single pipe 32 attached to the tip portion of the overhang panel portion 12 of the overhang support member 10 on the lower floor and the main horizontal single pipe 32 attached to the tip portion of the overhang panel portion 12, 12' of the overhang support member 10, 10' on the upper floor, and extending horizontally, with one or more horizontal secondary single pipes 36 connected to multiple vertical single pipes 33 via well-known single pipe clamps 31.

[0021] The scaffolding structure is further stabilized by attaching the horizontal sub-pipes 36 between the horizontal main pipes 32. It also improves the flexibility of the attachment position of various items such as protective nets 38 and fall prevention devices relative to the pipe installation surface.

[0022] Furthermore, in this embodiment, the overhang support members 10, 10' are made of precast concrete, and it is difficult to separate the overhang panel portions 12, 12' from the exterior wall panel portions 11, 11' without destroying them. Alternatively, the overhang panel portions 12, 12' constituting the overhang support members 10, 10' can be joined as a single unit to the exterior wall panel portions 11, 11' so that they can be separated from the exterior wall panel portions 11, 11'. In this case, when the exterior wall construction scaffolding structure 30 is removed, the overhang panel portions 12, 12' can be separated from the exterior wall panel portions 11, 11' and removed as temporary members that are not used as structural materials for the building 50.

[0023] In addition, in this embodiment, the scaffolding structure 30 for exterior wall construction is preferably connected to a horizontal secondary single-pipe pipe 36 connected via a single-pipe clamp 31 on the frame structure 53a, 53b, 53c side of the building 50 of the multiple vertical single-pipe pipes 33, via a known single-pipe clamp 31, and the vertical single-pipe pipe 37 for self-weight reinforcement is installed upright in the vertical direction with its lower end abutting against the upper surface of the protruding panel portion 12 of the protruding support member 10 and supported.

[0024] This allows the scaffolding structure 30 to be supported in a more stable manner by the overhang panel portion 12 of the overhang support member 10.

[0025] Furthermore, in this embodiment, the scaffolding structure 30 for exterior wall construction can also have a protective net 38 stretched over it to cover the side of the pipe installation surface, which is preferably made up of multiple horizontal main single-pipe pipes 32 and multiple vertical single-pipe pipes 33 assembled together vertically and horizontally, opposite the frame structure of the building 50.

[0026] This makes it possible to more safely carry out various types of work using the assembled scaffolding structure 30. Work using the scaffolding structure 30 as a scaffolding includes various exterior construction work such as installing exterior panels, painting the exterior, and repairing the exterior.

[0027] In this embodiment, the protruding support member 10 having an L-shaped cross-section that is attached to the framework structure 53a of the first floor ceiling and the framework structure 53b of the second floor ceiling of the building 50 is manufactured in advance as a precast concrete product in a factory or the like, as shown in Figure 3, and has an L-shaped cross-section consisting of an exterior wall panel portion 11 having a vertically elongated rectangular cross-section with a height of approximately 805 mm and a thickness of approximately 180 mm, and an protruding panel portion 12 having a horizontally elongated rectangular cross-section with a width of approximately 655 mm and a thickness of approximately 155 mm, which is formed integrally with the lower end portion of the exterior wall panel portion 11 so as to bend vertically horizontally. The protruding support member 10 is formed horizontally with an extension of, for example, about 3 to 10 m (see Figure 2), and a plurality of upper engaging hardware 13 and lower engaging hardware 14 are fixed and attached as a single unit to the upper and lower parts of the back side of the exterior wall panel part 11, opposite the protruding panel part 12, at predetermined intervals in the horizontal direction.

[0028] The upper engaging hardware 13 is a hardware member formed by integrally joining an anchor plate 13c equipped with an anchor rod 13b to the outer peripheral surface of an angle piece 13a made of, for example, an angle iron. When manufacturing the overhang support member 10, the embedded base of the anchor plate 13c is embedded in concrete together with the anchor rod 13b, so that one side of the L-shaped cross-sectional angle piece 13a is aligned with the back surface of the exterior wall panel 11, and the other side is caused to overhang laterally and perpendicularly from the back surface, thereby firmly fixing the angle piece 13a as a unit to the upper back surface of the exterior wall panel 11. A bolt fastening hole is formed in the other side of the angle piece 13a, and a male threaded bolt 61 of a connecting hardware 60 attached as a fastening part 55 to the framework structure 53a of the first floor ceiling is fastened to this bolt fastening hole (see Figure 9).

[0029] The lower engaging hardware 14 is an insert hardware with a female threaded hole on the inside, and like the upper engaging hardware 13, it is embedded in concrete when manufacturing the overhang support member 10, so that it is fixed integrally to the lower back side of the exterior wall panel part 11 with the open end face of the female threaded hole facing the back side of the exterior wall panel part 11. A male threaded bolt member 62 (see Figure 9) whose fastening position relative to the framework structure 53a of the first floor ceiling is screwed into the lower engaging hardware 14.

[0030] In this embodiment, in order to enable the assembly of the scaffolding structure 30 described below, insert metal fittings 63 for attaching single pipe clamps are attached at a plurality of locations at predetermined intervals in the horizontal direction of the overhang support member 10 to the tip portion of the overhang panel portion 12 of the overhang support member 10. The insert metal fittings 63 for attaching single pipe clamps are also embedded in concrete when the overhang support member 10 is manufactured, so that they are fixed integrally to the overhang panel portion 12 with the open end face of the female screw hole facing the tip portion of the overhang panel portion 12 (see Figure 2).

[0031] The protruding support member 10' having a T-shaped cross section and attached to the framework structure 53c of the third floor ceiling of the building 50 is similarly manufactured in advance as a precast concrete product in a factory or the like, as shown in Figure 4, and has a T-shaped cross section consisting of an exterior wall panel portion 11' having a vertically elongated rectangular cross section with a height of approximately 655 mm and a thickness of approximately 180 mm, and an protruding panel portion 12' having a horizontally elongated rectangular cross section with a width of approximately 470 mm and a thickness of approximately 155 mm, which is formed integrally with the exterior wall panel portion 11' and protrudes vertically from the middle part of the exterior wall panel portion 11'. The protruding support member 10' is also formed horizontally to have an extension of, for example, about 3 to 10 m (see Figure 2), and like the protruding support member 10 having an L-shaped cross-sectional shape, a plurality of upper engaging hardware 13 and lower engaging hardware 14 are fixed and attached as a single unit to the upper and lower parts of the back side of the exterior wall panel portion 11', opposite the protruding panel portion 12', at predetermined intervals in the horizontal direction.

[0032] In addition, in the case of the protruding support member 10' having a T-shaped cross-sectional shape, similar to the protruding support member 10 having an L-shaped cross-sectional shape, insert metal fittings 63 as clamp joint metal fittings for attaching single pipe clamps are attached at multiple locations at predetermined intervals in the horizontal direction at the tip portion of the protruding panel portion 12'.

[0033] On the other hand, in this embodiment, as shown in Fig. 9, a connecting metal fitting 60 is attached to the framework structure 53a of the first floor ceiling as an engaged portion 55 that engages and joins the upper engaging metal fitting 13 provided on the overhang support member 10. In this embodiment, a perimeter beam 65 made of, for example, H-shaped steel is provided along the outer perimeter edge of the framework structure 53a of the first floor ceiling, and a support bracket 66 is attached by being joined to the perimeter beam 65 by welding or the like so as to be fixed as a unit so as to overhang outward. The connecting metal fitting 60 is attached by being fixed to the upper surface plate portion 66a of the support bracket 66 in the portion overhanging from the perimeter beam 65, with the male threaded bolt portion 61 extending upright from the upper surface plate portion 66a. With the male threaded bolt portion 61 inserted into a bolt fastening hole formed on the other side of the angle piece 13a of the upper engaging hardware 13 of the overhang support member 10, the other side is sandwiched between the pair of nut members 61a threaded onto the top and bottom of it, and the angle piece 13a is fastened at a predetermined height. This makes it possible to firmly fix the overhang support member 10, via the angle piece 13a and the upper engaging hardware 13, to the framework structure 53a of the first floor ceiling at a predetermined height.

[0034] In this embodiment, a side plate portion 66b is attached to the protruding tip portion of the support bracket 66, and a bolt insertion and fastening hole is formed in this side plate portion 66b at a position corresponding to the lower engaging hardware 14 formed by the insert hardware of the protruding support member 10. A male threaded bolt member 62 is inserted into this bolt insertion and fastening hole, and the tip portion of the male threaded bolt member 62 is screwed into the lower engaging hardware 14 formed by the insert hardware of the protruding support member 10. With the male threaded bolt member 62 inserted into the bolt insertion and fastening hole, the side plate portion 66b is sandwiched between the pair of nut members 62a threaded on the left and right sides of the side plate portion 66b and fastened, thereby making it possible to fasten the side plate portion 66b to a predetermined position in the lateral direction of the male threaded bolt member 62. This makes it possible to fix the protruding support member 10 to the framework structure 53a while adjusting the erection of the exterior wall panel portion 11 by adjusting the distance from the framework structure 53a of the first floor ceiling portion via the male threaded bolt member 62 and the lower engaging hardware 14 made of insert hardware.

[0035] As examples of the single-pipe clamps 31 for attaching the horizontal main pipe 32 to the tip portions of the overhanging panel sections 12, 12′ and the single-pipe clamps 31 for attaching the vertical single-pipe 33 to the horizontal main pipe 32, for example, a single-pipe clamp 31A shown in FIG. 10 can be used, which has a clamp body 31c with a first fixing portion 31a that is attached to the horizontal main pipe 32 and a second fixing portion 31b that is attached to the vertical single-pipe 33, and a bolt portion 31d that is threaded into an insert metal fitting 63. In the single-pipe clamp 31A, the clamp body 31c has a configuration similar to that of known single-pipe clamps. In the single-pipe clamp 31A, the bolt portion 31d may be integrally fixed to the clamp body 31c by welding or the like. In this case, for example, the bolt portion 31d can be threaded into the female threaded hole of the insert hardware 63 by rotating the entire clamp body 31c, or by rotating the first fixing portion 31a to which the bolt portion 31d is fixed if the first fixing portion 31a and the second fixing portion 31b are rotatably connected. The bolt portion 31d may be attached to the clamp body 31c so as to be rotatable about its axis independently of the clamp body 31c. In this case, the bolt portion 31d can be threaded into the female threaded hole of the insert hardware 63 by rotating only the bolt portion 31d. To facilitate the rotation operation for threading the bolt portion 31d, a portion having a non-circular cross section, such as a hexagonal or rectangular cross section, may be provided at the base end or the like of the bolt portion 31d, and this portion may be rotated using a wrench, an automatic rotation device, or the like.

[0036] A preferred method for attaching and constructing the overhang support members that allows for efficient construction of the scaffolding structure for exterior wall construction of this embodiment will now be described. A preferred embodiment of the method for installing an overhang support member according to the present invention is employed as a method for installing a canopy section made up of the overhang panel section 12 that is arranged to overhang the outer wall section 51 of the building 50, for example, when constructing a three-story building 50 as shown in Figure 1, by incorporating the overhang support member 10, which consists of an exterior wall panel section 11 and an overhang panel section 12, into the outer wall section 51 of the building 50, thereby enabling installation without shoring or scaffolding.

[0037] That is, in this embodiment, when installing the exterior wall panel section 11 of the three-story building 50, it is difficult to erect temporary shoring to support it from below from the surrounding ground surface 52 or to install temporary scaffolding on the surrounding ground surface 52 due to its relationship with various adjacent equipment structures and other installed objects, and with separately ordered exterior construction work, etc. Therefore, a construction method is adopted in which the overhang support member 10 can be easily installed at a predetermined height position of the building 50 to be constructed by working without shoring or scaffolding, which does not require these temporary shoring or scaffolding.

[0038] In addition, in the embodiment, the scaffolding structure 30 is assembled upward from the height position of the framework structure 53a of the first floor ceiling of the building 50 using the overhanging support member 10 attached to the outer wall portion 51 of the building 50 by the attachment and construction method of the overhanging support member, without installing temporary supports or temporary scaffolding erected from the ground surface 52, and can be used as scaffolding, for example, when constructing the outer wall of the upper floor portion of the building 50.

[0039] The method of installing and constructing the overhang support member of this embodiment is an installation and construction method that enables the precast concrete overhang support members 10, 10', which are incorporated and attached to the exterior wall portion 51 of the building 50, to be installed at a predetermined height without shoring or scaffolding, without using temporary shoring or temporary scaffolding erected from the ground surface 52. As shown in Figures 2 to 4, the overhang support members 10, 10' are composed of exterior wall panel portions 11, 11' that are arranged along the exterior wall portion 51 of the building 50, and overhang panel portions 12, 12' that overhang laterally and outwardly from the exterior wall panel portions 11, 11', and upper and lower engaging hardware 13 and lower engaging hardware 14 that engage with the building's framework structures 53a, 53b, 53c are attached to the upper and lower back sides of the exterior wall panel portions 11, 11', opposite the overhang panel portions 12, 12'.

[0040] As shown in FIGS. 5 to 8, which illustrate an overhang support member 10 having an L-shaped cross section that is to be placed at a height position of a framework structure 53a of the ceiling of the first floor of a three-story building 50, the method for attaching the overhang support member of this embodiment involves using a plurality of sling wire members 18, each of which is made up of a pair of wire members 18a, one end 18b of which is fastened to the upper end portion of the exterior wall panel portion 11 and the other end 18c of which is fastened to the protruding tip portion of the overhang panel portion 12, to transport the overhang support member 10 (see FIG. 2) that has been lifted by heavy lifting equipment to an attachment position of the framework structure 53a of the building 50, and attaching the overhang support member 10 to the upper portion of the exterior wall panel portion 11. The process includes a temporary fixing process (see Figures 5 and 6) in which a worker from the indoor side of the building 50 engages the installed upper engaging hardware 13 with the engaging portion 55 of the frame structure 53a to temporarily fix the overhang support member 10, a wire removal process (see Figure 7) in which a worker using the overhang panel portion 12 of the temporarily fixed overhang support member 10 as a foothold removes the wire material 18c of the sling wire member 18 from at least the overhang tip portion of the overhang panel portion 12, and a final fixing process (see Figure 8) in which, after adjusting the erection of the exterior wall panel portion 11, the upper engaging hardware 13, together with the lower engaging hardware 14, are engaged and fixed with the engaging portion 55 of the frame structure 50a.

[0041] In addition, in this embodiment, adjustment of the erection of the exterior wall panel portion 11 in this fixing process is preferably carried out by workers using a work platform 54 installed on the indoor side of the lower floor (first floor) of the building 50 as a scaffold (see Figure 8).

[0042] Furthermore, in this embodiment, the wire removal process or the final fixing process is preferably carried out by a worker who has attached a fall arrest device 58 to a safety facility 57, such as a safety fence, installed inside the building.

[0043] In this embodiment, for example, the overhang support member 10 having an L-shaped cross-section that is attached to the framework structure 53b of the second floor ceiling of a three-story building 50, and the overhang support member 10' having a T-shaped cross-section that is attached to the framework structure 53c of the third floor ceiling, can be supported by the framework structure 53b of the second floor ceiling or the framework structure 53c of the third floor ceiling and attached as a single unit to these by performing the same operations as the overhang support member 10 having an L-shaped cross-section that is attached to the framework structure 53a of the second floor ceiling.

[0044] In this embodiment, angle pieces 64a, made of, for example, angle irons and having locking holes, to which end 18b of one wire 18a of the sling wire member 18 is locked, are attached at multiple locations at predetermined intervals in the horizontal direction to the upper end portion of the exterior wall panel 11. Angle pieces 64b, made of, for example, angle irons and having locking holes, to which end 18c of the other wire 18a of the sling wire member 18 is locked, are attached at multiple locations at predetermined intervals in the horizontal direction to the protruding tip portion of the protruding panel 12.

[0045] In addition, an angle piece 64a to which end 18b of one wire material 18a of the sling wire member 18 is attached is attached at the upper end portion of the outer wall panel portion 11', and an angle piece 64b to which end 18c of the other wire material 18a of the sling wire member 18 is attached is attached at multiple locations at a predetermined interval in the horizontal direction at the protruding tip portion of the protruding panel portion 12'.

[0046] To attach a precast concrete overhang support member 10 to, for example, a framework structure 53a of the first floor ceiling of a building 50 using the method for attaching an overhang support member of this embodiment, in the temporary fixing step, as shown in Figures 5 and 6, multiple sling wire members 18 made of a pair of wire materials 18a, one end 18b of which is fastened to the upper end portion of the exterior wall panel portion 11 and the other end 18c of which is fastened to the protruding tip portion of the overhang panel portion 12, are used to lift the overhang support member 10 (see Figure 2) using heavy lifting equipment and transport it to the attachment position of the overhang support member 10 in the framework structure 53a of the building 50, and then, by a worker working from the indoor side of the building 50, the overhang support member 10 is temporarily fixed to the framework structure 53a via the upper engaging hardware 13 and the engaged portion 55 of the connecting hardware 60 of the framework structure 53a, as described above.

[0047] Thereafter, in the wire removal process, as shown in Figure 7, a worker using the protruding panel portion 12 of the temporarily fixed protruding support member 10 as a foothold removes the wire material 18c of the sling wire member 18 from at least the protruding tip portion 12a of the protruding panel portion 12. When using the protruding panel portion 12 as a foothold, the worker can safely perform the work by fastening fall arrest equipment 58 to safety equipment 57, such as a safety fence, preferably installed indoors.

[0048] Furthermore, in this fixing process, as shown in Figure 8, a worker using a workbench 54, preferably installed on the indoor side of the lower floor (first floor) of the building 50, as a scaffolding, adjusts the erection of the exterior wall panel portion 11 of the temporarily fixed overhang support member 10 via the above-mentioned male threaded bolt member 62 and the lower engaging hardware 14 made of insert hardware, and then fixes the upper engaging hardware 13 together with the lower engaging hardware 14 to the frame structure 50a by tightening the nut members 61a, 62a, respectively.This joins the overhang support member 10 as a single unit while firmly supporting it to the frame structure 50a, making it possible to provide a stable eave portion made of the overhang panel portion 12.

[0049] As a result, according to the installation method for the overhang support member of this embodiment, the overhang support member 10 comprising the exterior wall panel portion 11 and the overhang panel portion 12 can be easily installed at a predetermined height position of the building 50 to be constructed without any supports or scaffolding.

[0050] In this embodiment, as described above, the overhang support member 10, which has an L-shaped cross section and includes, for example, an exterior wall panel portion 11 and an overhang panel portion 12, is installed at a predetermined height of the building 50 to be constructed without shoring or scaffolding. Insert metal fittings 63 for attaching single-pipe clamps are attached to the tip of the overhang panel portion 12 at multiple locations at predetermined intervals in the horizontal direction of the overhang support member 10. Therefore, as shown in FIG. 1, by utilizing the overhang panel portion 12 of such an overhang support member 10 installed without shoring or scaffolding, it is possible to assemble temporary scaffolding for constructing the upper floors of the building 50 without erecting temporary shoring or the like from the ground surface 52.

[0051] That is, in this embodiment, the overhang support members 10, 10' are fixed and installed at least at two ceiling height positions: the outer end of the framework structure 53a of the first floor ceiling and the outer end of the framework structures 53b, 53c of the upper floor ceiling of the second or third floor, which is located one or two floors above that, by engaging the upper engaging hardware 13 attached to the exterior wall panel portion with the engaging portions 55 provided on the framework structures 53a, 53b, 53c of the building 50, and insert hardware 63 for attaching single pipe clamps is attached to the tip portions of the overhang panel portions 12, 12' of these overhang support members 10, 10', respectively.

[0052] As a result, in this embodiment, by engaging a plurality of known single-pipe clamps 31 fixed to insert hardware 63 with the tip portions of the protruding panel portions 12, 12' of each of these installed protruding support members 10, 10', the horizontal main single-pipe pipes 32 can be installed in at least two tiers spaced apart in the vertical direction, with each tier extending horizontally along the tip portions and fixed in place.

[0053] Furthermore, by connecting multiple vertical single pipes 33 to the horizontal main single pipes 32 attached at least in two upper and lower tiers via known single pipe clamps 31, multiple vertical single pipes 33 can be attached upright at intervals in the horizontal direction, and multiple scaffolding brackets 34 can be attached at a predetermined height position, each supported by the multiple vertical single pipes 33, so that they extend toward the frame structures 53a, 53b, 53c of the building 50.

[0054] Furthermore, by supporting scaffolding boards 35 on these attached scaffolding brackets 34 and installing them horizontally at a predetermined height in the area between the building's frame structure 53a, 53b, 53c and the pipe installation surface made up of multiple horizontal main single-pipe pipes 32 and multiple vertical single-pipe pipes 33 assembled together vertically and horizontally, a scaffolding structure 30 for exterior wall construction can be formed.

[0055] The scaffolding bracket 34 can be any one that can be fixed to the vertical single-tube pipe 33, and can be, for example, one that includes a board receiving portion of a scaffolding board 35 that has an engaging portion that can be engaged and disengaged with the vertical single-tube pipe 33, and a support portion that supports the board receiving portion from below. The scaffolding bracket 34 may be one that can be fixed to the vertical single-tube pipe 33 by engaging with an engaging portion such as an opening directly provided in the vertical single-tube pipe 33, or one that can be fixed to the vertical single-tube pipe 33 by engaging with an engaging portion fixed to the vertical single-tube pipe 33 by welding or the like.

[0056] In addition, in this embodiment, adjustment of the erection of the exterior wall panel portion 11 in this fixing process is preferably carried out by workers using a work platform 54 installed on the indoor side of the lower floor (first floor) of the building 50 as a scaffold (see Figure 8).

[0057] The scaffolding structure for the overhang support members of the present invention is not limited to the above-described embodiment, and various modifications are possible. Furthermore, the method for constructing the scaffolding structure for exterior wall construction is not limited to the above-described method for attaching the overhang support members, and various modifications are possible. For example, the overhang support member used in the scaffolding structure for exterior wall construction may be made of steel instead of precast concrete. FIG. 11 is a diagram showing the structure of a scaffolding structure for exterior wall construction using a steel overhang support member 100, in the vicinity of the attachment portion of the overhang support member 100 to the framework structure 53a. In the example shown in FIG. 11, the overhang support member 100 includes an exterior wall panel portion 111 and an overhang panel portion 112 fixed to the exterior wall panel 111 via fasteners such as bolts. The overhang panel portion 112 may be detachably joined to the exterior wall panel portion 111 as an integral part. Alternatively, the overhang panel portion 112 may be inseparably joined to the exterior wall panel portion 111 by welding or the like. Both the exterior wall panel portion 111 and the overhang panel portion 112 in the overhang support member 100 are made of steel. The overhang support member 100 is attached in a state of extending laterally along the longitudinal direction of the outer periphery beam 65 provided on the outer peripheral edge portion of the framework structure 53a of the first floor ceiling portion.

[0058] 11, a clamp joint hardware 63A made of an L-shaped angle bar having a bolt insertion fastening hole 63a is attached to the tip of the protruding panel portion 111 of the protruding support member 100 in a non-separable or separable manner by welding or bolts, etc. By inserting the bolt portion 31d of the bolted single pipe clamp 31A described above into the bolt insertion fastening hole 63a and tightening a nut, etc., the lateral main single pipe 32 can be attached to the tip of the protruding panel portion 112 via the single pipe clamp 31A. Similarly, the lateral main single pipe 32 can be attached to the ceiling of an upper floor, for example, to the frame structures 53b, 53c of the ceiling of the second and / or third floor, using the protruding support member 100.

[0059] Furthermore, the method of transporting the overhang support members 10, 10', 100 to an installation position at a predetermined height does not have to be a method of lifting them with heavy lifting equipment using the sling wire member 18. Furthermore, instead of fixing the single pipe clamp 31 to the insert hardware 63 via the bolt portion 31d directly attached to the single pipe clamp 31, the bolt portion 31d of a connecting hardware having a connection portion for the single pipe clamp 31 and the bolt portion 31d may be screwed into the insert hardware 63, and the single pipe clamp 31 may be fixed indirectly via the connecting hardware.

[0060] Furthermore, the engaged portion of the framework structure to which the upper engaging hardware attached to the exterior wall panel portion is engaged does not necessarily have to be provided on a support bracket that is integrally fixed to the framework structure so as to protrude outward. The protruding support member including the exterior wall panel portion and the protruding panel portion may have a cross-sectional shape such as an L-shape or a T-shape, or an H-shape, etc.

[0061] In addition, as the single pipe clamp 31 that connects the horizontal secondary single pipe 36 to the vertical single pipe 33, and the single pipe clamp 31 that connects the horizontal secondary single pipe 36 to the vertical single pipe 37 for self-weight support reinforcement, a known single pipe clamp 31 that does not have a bolt portion 31d can be used. In addition, the work of fixing the single-pipe clamp 31 to the tip of the protruding panel portion 12, 12' via the insert metal fittings 63 and the work of attaching the horizontal secondary single-pipe pipe 36 via the fixed single-pipe clamp 31 may be performed in whole or in part by workers using the protruding panel portion 12, 12' of the protruding support member installed in the temporary fixing process or the main fixing process as a foothold. [Explanation of symbols]

[0062] 10,10' overhang support member 11,11' exterior wall panel 12,12' extension panel 13 Upper engagement hardware 13a Angle piece 13b Anchor rod 13c anchor plate 14 Lower engagement hardware 18 Sling wire material 18a wire material 18b One end 18c Other end 30 Scaffolding structure for exterior wall construction 31 Single pipe clamp 31A Single pipe clamp with bolt 32 Horizontal main single pipe 33 Vertical single pipe 34 Scaffolding bracket 35 Scaffolding Plank 36 Horizontal secondary single pipe 37 Vertical single pipe for weight support reinforcement 38 Protective Net 50 Buildings 51 External wall part 52 Ground surface 53a First floor ceiling frame structure 53b Second floor ceiling frame structure 53c 3rd floor ceiling frame structure 54 Workbench 55 Locked part 57 Safety equipment 58 Fall arrest equipment 60 Metal joints 61a Nut member 61 Male thread bolt part 62 Male thread bolt component 62a Nut member 63 Clamp joint hardware for single pipe clamp installation 64a, 64b Angle piece 65 Perimeter beam 66 Support bracket

Claims

1. A scaffolding structure for exterior wall construction using overhanging support members is installed above the height position of the first floor ceiling of the building's framework structure without using temporary shoring and temporary scaffolding erected from the ground surface, and serves as a work scaffold when constructing the exterior wall of the upper floor of the building. The overhang support member is configured to include an exterior wall panel portion to be placed on the exterior wall portion of the building, and an overhang panel portion that overhangs laterally outward from the exterior wall panel portion, and an engaging hardware that engages with the framework structure of the building is attached to the back side of the exterior wall panel portion opposite the overhang panel portion, and a clamp joint hardware for attaching a single pipe clamp is attached to the tip portion of the overhang panel portion, The overhang support member is fixed and installed at the height of at least two ceiling portions, namely, the outer end of the framework structure of the ceiling portion of the first floor and the outer end of the framework structure of the ceiling portion of an upper floor located one or more floors above the first floor, by the engaging hardware attached to the exterior wall panel portion being engaged with the engaging portion provided on the framework structure of the building, The tip end portions of the protruding panel portions of each of the installed protruding support members are engaged with a plurality of single-pipe clamps fixed to the clamp joint hardware, so that horizontal main single-pipe pipes are attached in at least two stages spaced apart in the vertical direction, each extending horizontally along the tip end portion and fixed thereto; A plurality of vertical single pipes are attached in an upright position at intervals in the horizontal direction by being connected to the horizontal main single pipes attached in at least two tiers, upper and lower, via single pipe clamps, a plurality of scaffolding brackets are attached to the plurality of vertical single pipes at predetermined heights so as to project toward the framework of the building; A scaffolding structure for exterior wall construction in which scaffolding boards are supported by the attached scaffolding brackets and installed extending horizontally at a predetermined height in the area between the building's framework structure and the pipe installation surface made up of a plurality of horizontal main single-pipe pipes and a plurality of vertical single-pipe pipes assembled together vertically and horizontally.

2. 2. A scaffolding structure for exterior wall construction as described in claim 1, wherein in the area between the main horizontal single pipe attached to the tip portion of the protruding panel portion of the protruding support member on the lower floor and the main horizontal single pipe attached to the tip portion of the protruding panel portion of the protruding support member on the upper floor, one or more secondary horizontal single pipes are attached extending horizontally and connected to multiple vertical single pipes via single pipe clamps.

3. 3. A scaffolding structure for exterior wall construction as described in claim 1 or 2, wherein the protruding panel portion constituting the protruding support member is detachably joined to the exterior wall panel portion as a single unit, and when the scaffolding structure for exterior wall construction is removed, the protruding panel portion is separated from the exterior wall panel portion and removed.

4. 4. A scaffolding structure for exterior wall construction as described in claim 3, wherein the vertical single-pipe pipes for self-weight reinforcement are connected to the horizontal secondary single-pipe pipes connected to the building frame structure side of the plurality of vertical single-pipe pipes via single-pipe clamps, and the vertical single-pipe pipes for self-weight reinforcement are installed upright in the vertical direction with their lower ends abutted against the upper surface of the protruding panel portion of the protruding support member and supported.

5. 3. A scaffolding structure for exterior wall construction as described in claim 1 or 2, wherein a protective net is stretched to cover the pipe installation surface of the multiple horizontal main single-pipe pipes and multiple vertical single-pipe pipes assembled together vertically and horizontally, opposite the frame structure of the building.

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