scaffold

Abstract

To provide a scaffold enabling safe lifting work of a lifting object.SOLUTION: A scaffold 10 installed on an outer periphery of a structural member 2a that constitutes a structure 1, includes: a pair of first scaffold portions 20 projecting outward from the structural member 2a, and having a first scaffold body 21 and a support frame 22 that supports the first scaffold body 21, respectively; and a second scaffold portion 30 detachably provided between the pair of first scaffold portions 20. At least one of the support frames 22 of the pair of first scaffold portions 20 is configured so that an overhanging direction of the first scaffold portion 20 can be changed by turning.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a scaffold. [Background technology]

[0002] Conventionally, one technique proposed for setting up scaffolding around the structure (pillars or walls) of a building under construction involves setting up multiple scaffoldings to surround the structure and securing them with metal fittings that allow them to slide up and down (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-184033 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the technology described in Patent Document 1, as mentioned above, multiple scaffoldings are provided to surround the main body, so for example, when a crane is used to raise or lower a load near multiple scaffoldings, there is a risk that the main body or the load may be damaged if any of the multiple scaffoldings comes into contact with the main body or the load, and therefore there is room for improvement from the perspective of safely performing such raising and lowering operations.

[0005] The present invention has been made in consideration of the above, and aims to provide a scaffold that enables lifting and lowering work on an object to be lifted and lowered safely. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems and achieve the object, the scaffolding described in claim 1 is a scaffolding to be installed on the outer periphery of a structural member that constitutes a structure, and is a pair of first scaffolding sections that protrude outward from the structural member, each of which has a first scaffolding body and a support frame that supports the first scaffolding body, and a second scaffolding section that is removably provided between the pair of first scaffolding sections, and at least one of the support frames of the pair of first scaffolding sections is configured to be able to freely change the protruding direction of the first scaffolding section by rotating. The second scaffolding section comprises a second scaffolding main body and a connecting section that is connected to either one of the pair of first scaffolding sections via a first hinge section and is also connected to the second scaffolding main body via a second hinge section.

[0007] The scaffolding according to claim 2 is the scaffolding according to claim 1, A handrail section is provided on at least one of the pair of first scaffolding sections, and is equipped with a handrail section that can move up and down relative to the first scaffolding section. [Effects of the Invention]

[0010] According to the scaffolding described in claim 1, the scaffolding comprises a pair of first scaffolding sections extending outward from a structural member, each of the pair of first scaffolding sections having a first scaffolding body and a support frame supporting the first scaffolding body, and a second scaffolding section removably provided between the pair of first scaffolding sections, and at least one of the support frames of the pair of first scaffolding sections is configured to be rotatable to change the extending direction of the first scaffolding section, making it possible to change the extending direction of the first scaffolding section and set up the scaffolding according to the situation. Therefore, compared to conventional technology (technology in which multiple scaffoldings are simply provided to surround a building frame), it is easier to avoid contact between the first scaffolding section and the structural member, its surrounding members, or the object to be lifted or lowered during lifting or lowering work, making it possible to perform lifting or lowering work safely. Furthermore, since the second scaffolding section includes a second scaffolding body and a connecting section that is connected to either one of the pair of first scaffolding sections via a first hinge section and is also connected to the second scaffolding body via a second hinge section, the second scaffolding section can be easily attached to and detached from the first scaffolding section without having to rotate at least one of the pair of first scaffolding sections. Furthermore, when the second scaffolding section is detached from the first scaffolding section, it is easy to position the second scaffolding section in a position that does not interfere with climbing and descending work.

[0011] According to the scaffolding of claim 2, This is a handrail section that is provided on at least one of a pair of first scaffolding sections and is capable of moving up and down relative to the first scaffolding section.As such, the handrail section can be moved up and down relative to the first scaffolding section depending on the situation, making it easier to avoid contact between the handrail section and structural components, their surrounding components, or the object being lifted or lowered during lifting or lowering operations. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view conceptually showing a scaffolding according to an embodiment of the present invention, illustrating the installation state when work other than lifting work is being performed. [Figure 2] FIG. 2 is a plan view of the scaffolding of FIG. 1 (partially omitted). [Figure 3] 3 is a cross-sectional view taken along the line AA in FIG. 2 (partially omitted). [Figure 4] 3 is a cross-sectional view taken along the line BB in FIG. 2 (partially omitted). [Figure 5] FIG. 3 is a plan view showing an installation state when lifting and lowering work is performed, showing an area corresponding to FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the scaffolding according to the present invention will be described in detail with reference to the accompanying drawings. First, [I] the basic concept of the embodiment will be explained, then [II] specific contents of the embodiment will be explained, and finally, [III] modified examples of the embodiment will be explained. However, the present invention is not limited to the embodiment.

[0016] [I] Basic Concept of the Embodiment First, the basic concept of the embodiment will be described. The embodiment generally relates to a scaffold that is installed around the periphery of a structural member that constitutes a structure.

[0017] Here, the specific structure and type of "structure" are arbitrary, but the concept includes, for example, architectural structures such as office buildings, public facilities, commercial facilities, and apartment buildings (e.g., condominiums), as well as civil engineering structures such as bridges, and in this embodiment, it will be described as an office building under construction.

[0018] Furthermore, "structural member" refers to a part of the constituent elements of a structure that is positioned so as to be surrounded by scaffolding, and is a concept that includes, for example, the structure's main body (e.g., pillars, wall materials, etc.) and accessories attached to the main body (e.g., reinforcing members that reinforce the main body), but in the embodiment, it will be described as a pillar material of the structure.

[0019] Also, the "outer periphery of a structural member" means the area surrounding the outside of the structural member.

[0020] Furthermore, "scaffolding" refers to a structure on which workers stand when working at heights, and is a concept that includes, for example, temporary scaffolding that is set up on a structure only while work is being performed, and permanent scaffolding that is set up on a structure at all times, regardless of whether work is being performed, but in the embodiment, it will be described as temporary scaffolding.

[0021] [II] Specific details of the embodiment Next, specific details of the embodiment will be described.

[0022] (composition) First, the configuration of the scaffolding 10 according to the embodiment and the configuration of the structure 1 to which the scaffolding 10 is applied will be described.

[0023] (Composition - Structure) First, the configuration of the structure 1 will be described.

[0024] Fig. 1 is a perspective view conceptually showing a scaffolding 10 according to an embodiment of the present invention, and is a perspective view showing an installation state when work other than the lifting work described below is being performed. Here, the X direction in Fig. 1 is referred to as the left-right direction or width direction of the scaffolding 10 (-X direction is the left direction of the scaffolding 10, and +X direction is the right direction of the scaffolding 10), the Y direction in Fig. 1 is referred to as the front-rear direction of the scaffolding 10 (+Y direction is the front direction of the scaffolding 10, and -Y direction is the rear direction of the scaffolding 10), and the Z direction in Fig. 1 is referred to as the up-down direction of the scaffolding 10 (+Z direction is the upward direction of the scaffolding 10, and -Z direction is the downward direction of the scaffolding 10).

[0025] The structure 1 is, for example, a steel-framed (or reinforced concrete) architectural structure (specifically, a multi-story office building under construction), and as shown in Figure 1, it comprises flooring (not shown), columns 2, beams 3, and wall materials (not shown).

[0026] Of these, the floor materials constitute the floors of the structure 1, and a plurality of them are arranged side by side in the vertical direction at intervals from each other.

[0027] The pillars 2 support the flooring, and are provided in multiple numbers between the floorings (i.e., in the space between each floor of the structure 1). Hereinafter, of the multiple pillars 2, pillars 2a that are positioned so as to be surrounded by the scaffolding 10 will be referred to as "structural members 2a."

[0028] In this embodiment, a lifting object H (for example, a curing frame for curing the structural member 2a, which is constructed by assembling a plurality of steel frame members) is provided behind the structural member 2a and is lifted and lowered using a lifting means such as a crane (not shown), and is detachably attached to the structural member 2a. In the following, the work of lifting and lowering the lifting object H (specifically, the work of lifting and lowering the lifting object H and the scaffolding 10) will be referred to as "lifting work."

[0029] The beams 3 support the flooring, and are provided in multiple positions so as to be able to come into contact with the underside of each flooring, or are provided between floorings on the same floor.

[0030] The wall materials are used to separate the floor materials from one another, and a plurality of wall materials are provided between the floor materials.

[0031] (Configuration - Scaffolding) Next, the scaffolding 10 will be described.

[0032] Fig. 2 is a plan view of the scaffolding 10 in Fig. 1 (partially omitted), Fig. 3 is a cross-sectional view taken along line AA in Fig. 2 (partially omitted), and Fig. 4 is a cross-sectional view taken along line BB in Fig. 2 (partially omitted).

[0033] The scaffolding 10 is a structure for a worker M to step on when working at heights, and as shown in Figure 1, is provided on the outer periphery of a structural member 2a (in the embodiment, only one is provided, and it is attached detachably to the object H to be lifted), and comprises a first scaffolding section 20, a second scaffolding section 30, a third scaffolding section 40, a fourth scaffolding section 50, a first handrail section 60, and a second handrail section 70.

[0034] (Configuration - Scaffolding - 1st Scaffolding Section) The first scaffolding sections 20 are part of the basic structure of the scaffolding 10. As shown in Figures 1 and 2, the first scaffolding sections 20 are provided on the left and right sides of the structural member 2a so as to protrude outward from the structural member 2a (in Figures 1 and 2, a pair of first scaffolding sections 20 are provided so as to protrude forward), and each includes a first scaffolding main body 21 and a support frame 22.

[0035] In the following, where necessary, of the pair of first scaffolding sections 20, the first scaffolding section 20a located on the left side of the structural member 2a will be referred to as the "left first scaffolding section 20a," and the first scaffolding section 20b located on the right side of the structural member 2a will be referred to as the "right first scaffolding section 20b."

[0036] (Configuration - Scaffolding - First Scaffolding Section - First Scaffolding Body) The first scaffolding body 21 is the basic structure of the first scaffolding section 20, and as shown in FIG. 2, is provided substantially horizontally in the vicinity of the structural member 2a, and comprises an outer scaffolding body 21a and an inner scaffolding body 21b.

[0037] Of these, the outer scaffolding body 21a is part of the basic structure of the first scaffolding body 21, and is constructed using, for example, known scaffolding boards (for example, steel scaffolding boards), and is arranged at a distance from the structural member 2a, as shown in Figure 2.

[0038] In addition, the inner scaffolding body 21b is another part of the basic structure of the first scaffolding body 21, and is constructed using, for example, known scaffolding boards (for example, steel scaffolding boards), and as shown in Figure 2, is provided between the outer scaffolding body 21a and the structural member 2a, and is connected to the outer scaffolding body 21a by a hinge part (for example, a hinge or the like) not shown in the figure so that it can rotate around an axis that runs along the fore-and-aft direction.

[0039] Furthermore, the specific shapes and sizes of the outer scaffolding body 21a and the inner scaffolding body 21b are arbitrary, but in the embodiment they are set as follows.

[0040] That is, as shown in FIG. 2, the planar shape of the outer scaffolding main body 21a and the planar shape of the inner scaffolding main body 21b are each set to be approximately rectangular, but this is not limited to this, and for example, they may each be set to a shape other than approximately rectangular (for example, approximately elliptical, etc.).

[0041] Furthermore, the left-right length of the outer scaffolding main body 21a is set to be shorter than the left-right length of the structural member 2a, but is not limited to this and may be set to be greater than or equal to the left-right length of the structural member 2a, for example. Furthermore, the front-to-rear length of the outer scaffolding main body 21a is set to be longer than the front-to-rear length of the structural member 2a, but is not limited to this and may be set to be less than or equal to the front-to-rear length of the structural member 2a, for example. Furthermore, the up-to-down length (thickness) of the outer scaffolding main body 21a is set to a thickness that can support a predetermined load.

[0042] Furthermore, the length in the left-right direction of the inner scaffolding main body 21b is set to be shorter than the length in the left-right direction of the outer scaffolding main body 21a. Furthermore, the length in the front-to-rear direction of the inner scaffolding main body 21b is set to be longer than the length in the front-to-rear direction of the outer scaffolding main body 21a. Furthermore, the length (thickness) in the up-down direction of the inner scaffolding main body 21b is set to a thickness that can support a predetermined load.

[0043] (Configuration - Scaffolding - First scaffolding section - Support frame) Returning to FIG. 1, the support frame 22 is for supporting the first scaffolding body 21, and is provided in the vicinity of the first scaffolding body 21 as shown in FIGS.

[0044] Furthermore, the specific configuration of this support frame 22 is arbitrary, but in the embodiment, each of the support frames 22 of the pair of first scaffolding sections 20 is configured so that the extension direction of the first scaffolding section 20 can be freely changed by rotating.

[0045] Specifically, as shown in FIG. 3, each of the support frames 22 of the pair of first scaffolding sections 20 includes a first support frame section 22a, a second support frame section 22b, and a third support frame section 22c.

[0046] (Configuration - Scaffolding - First scaffolding section - Support frame - First support frame section) The first support frame portion 22a is a part of the basic structure of the support frame 22. This first support frame portion 22a is formed, for example, by combining known scaffolding frame materials (for example, steel scaffolding frame materials) using fasteners or welding, and is provided so as to cover the periphery of the first scaffolding main body 21, as shown in Figs.

[0047] (Configuration - Scaffolding - First scaffolding section - Support frame - Second support frame section) The second support frame portion 22b is another part of the basic structure of the support frame 22. This second support frame portion 22b is configured using, for example, a known scaffolding frame material (for example, a steel scaffolding frame material), and is provided below the first support frame portion 22a, as shown in FIG.

[0048] Specifically, the front end of the second support frame portion 22b is inclined so as to be positioned higher than the rear end of the second support frame portion 22b, and the front end of the second support frame portion 22b is connected to the first support frame portion 22a by a fixing device or the like.

[0049] (Configuration - Scaffolding - 1st scaffolding section - Support frame - 3rd support frame section) The third support frame portion 22c is another part of the basic structure of the support frame 22. This third support frame portion 22c is configured using, for example, a known scaffolding frame material (for example, a steel scaffolding frame material), and as shown in Fig. 3, is provided substantially vertically and behind the first support frame portion 22a and the second support frame portion 22b.

[0050] Specifically, the upper end or a portion nearby thereof of the third support frame portion 22c is connected to the rear end of the first support frame portion 22a by a fixture or the like, and the lower end or a portion nearby thereof is connected to the rear end of the second support frame portion 22b by a fixture or the like. Furthermore, the third support frame portion 22c is connected to the lifting object H by a pair of first swivel members 23 (for example, the first swivel members 23 including the swivel shaft 23a) so as to be rotatable about an axis along the vertical direction.

[0051] In the embodiment, in order to prevent the third support frame portion 22c from rotating unintentionally, a rotation limiting portion (not shown, for example, a stopper member, etc.) for limiting the rotation of the third support frame portion 22c is detachably attached to the upper first swivel member 23 of the pair of first swivel members 23 via a through hole not shown.

[0052] Such a configuration of the support frame 22 allows the projection direction of the first scaffolding section 20 to be changed, making it possible to set up the scaffolding 10 according to the situation.

[0053] The first scaffolding section 20 as described above makes it easier to avoid contact between the first scaffolding section 20 and the structural member 2a or other members 4 of the structure 1 (for example, beams 3 or pillars 2, etc.; hereinafter referred to as "peripheral members 4") during climbing operations.

[0054] (Configuration - Scaffolding - Second Scaffolding Section) Returning to Fig. 1, the second scaffolding section 30 is another part of the basic structure of the scaffolding 10. As shown in Figs. 1, 2 and 4, the second scaffolding section 30 is detachably provided between a pair of first scaffolding sections 20, and includes a second scaffolding main body 31 and a connecting section 32.

[0055] (Configuration - Scaffolding - Second scaffolding section - Second scaffolding body) Returning to Fig. 2, the second scaffolding body 31 is the basic structure of the second scaffolding section 30. This second scaffolding body 31 is constructed using, for example, known scaffolding planks (for example, steel scaffolding planks), and is provided above the pair of first scaffolding sections 20 so as to be able to abut against the front portions of each of the pair of first scaffolding sections 20, as shown in Fig. 2.

[0056] Furthermore, the specific shape and size of the second scaffolding body 31 are arbitrary, but in this embodiment they are set as follows.

[0057] That is, as shown in Figure 2, the planar shape of the second scaffolding body 31 is set to be approximately rectangular, but this is not limited to this and, for example, it may be set to a shape other than approximately rectangular (for example, approximately elliptical, etc.).

[0058] Furthermore, the left-right length of the second scaffolding body 31 is set to be longer than the left-right length of the structural member 2a. Furthermore, the front-rear length of the second scaffolding body 31 is set to be shorter than the front-rear length of the structural member 2a, but this is not limitative and, for example, it may be set to be greater than the front-rear length of the structural member 2a. Furthermore, the up-down length (thickness) of the second scaffolding body 31 is set to a thickness that can support a predetermined load.

[0059] In the embodiment, as shown in Figure 2, when the second scaffold main body 31 is to be kept in contact with the front portions of each of the pair of first scaffold sections 20, a movement restriction section 33 (e.g., a stopper material, etc.) for restricting the movement of the second scaffold main body 31 is detachably attached to one of the pair of first scaffold sections 20 (in Figure 2, the left first scaffold section 20a).

[0060] (Configuration - Scaffolding - Second scaffolding section - Connection section) The connecting section 32 is for connecting the second scaffolding main body 31 to one of the pair of first scaffolding sections 20 (in the embodiment, the right-side first scaffolding section 20b). This second scaffolding main body 31 is constructed using, for example, a known connecting member (as an example, a steel connecting member that is shorter than the longitudinal direction of the second scaffolding main body 31), and is provided in the vicinity of the right-side first scaffolding section 20b, as shown in Fig. 4.

[0061] Furthermore, the method of connecting the second scaffolding main body 31 and either one of the pair of first scaffolding sections 20 using the connecting section 32 is arbitrary, but in the embodiment, the connecting section 32 and either one of the pair of first scaffolding sections 20 are connected via a first hinge section 34, and the connecting section 32 and the second scaffolding main body 31 are connected via a second hinge section 35. Of these, the first hinge section 34 is a member that enables the connecting section 32 to rotate around an axis that runs along the front-to-rear direction, and the second hinge section 35 is a member that enables the second scaffolding main body 31 to rotate around an axis that runs along the front-to-rear direction.

[0062] Specifically, as shown in Figure 4, the right end of the connection part 32 is connected to the right-side first scaffolding part 20b via a first hinge part 34, and the left end of the connection part 32 is connected to the right end of the second scaffolding main body 31 or a nearby part thereof via a second hinge part 35.

[0063] Such a second scaffolding section 30 makes it easy to attach and detach the second scaffolding section 30 to and from the first scaffolding section 20 without having to rotate at least one of the pair of first scaffolding sections 20. Furthermore, as shown in Fig. 4, when the second scaffolding section 30 is detached from the first scaffolding section 20, it becomes easy to position the second scaffolding section 30 in a position that does not interfere with ascending and descending operations.

[0064] (Configuration - Scaffolding - 3rd Scaffolding Section) Returning to Fig. 2, the third scaffolding section 40 is another part of the basic structure of the scaffolding 10. This third scaffolding section 40 is constructed using, for example, known scaffolding planks (for example, steel scaffolding planks), and as shown in Fig. 2, is provided on each of the left and right sides of the structural member 2a, on the structural member 2a side relative to the first scaffolding main bodies 21 of the pair of first scaffolding sections 20, so as not to be able to turn (i.e., a pair of third scaffolding sections 40 are provided).

[0065] Specifically, each of the pair of third scaffolding sections 40 is disposed in a position where it can support one of the pair of first scaffolding sections by extending one of the pair of first scaffolding sections in a predetermined direction, and is connected to the lifting target H by fasteners or the like. More specifically, as shown in FIG. 2, the left-side third scaffolding section 40 is disposed so as to abut against the underside of the inner scaffolding main body 21b of the left-side first scaffolding section 20a and / or the underside of the first support frame section 22a by extending the left-side first scaffolding section 20b forward. Furthermore, the right-side third scaffolding section 40 is disposed so as to abut against the underside of the inner scaffolding main body 21b of the right-side first scaffolding section 20b and / or the underside of the first support frame section 22a by extending the right-side first scaffolding section 20b forward.

[0066] Such a third scaffolding section 40 can tightly surround the structural member 2a, reducing the possibility of materials falling. It can also reduce the effects of shaking and the like in at least one of the pair of first scaffolding sections 20, improving the stability of the scaffolding installation.

[0067] (Configuration - Scaffolding - 4th Scaffolding Section) The fourth scaffolding section 50 is another part of the basic structure of the scaffolding 10. This fourth scaffolding section 50 is constructed using, for example, known scaffolding planks (for example, steel scaffolding planks), and as shown in Fig. 2, is provided between the pair of third scaffolding sections 40 on the rear side of the structural member 2a. Specifically, each is connected to the object H to be lifted or lowered by a fastener or the like, and is connected to the object H to be lifted or lowered so as to be rotatable about an axis along the left-right direction by a second swivel member (for example, a gas spring) (not shown) attached to the object H to be lifted or lowered.

[0068] Such a fourth scaffolding section 50 can enclose the structural member 2a even more tightly, further reducing the possibility of materials and the like falling.

[0069] (Configuration - Scaffolding - First handrail section) Returning to Fig. 1, the first handrail section 60 is a handrail section for preventing a person from falling from the scaffolding 10 by holding on to the first handrail section 60. This first handrail section 60 is made of, for example, a known scaffolding handrail material (one example is a steel scaffolding handrail material) or the like, and is provided on each of the pair of first scaffolding sections 20 as shown in Figs. 1 and 2.

[0070] Specifically, the first handrail section 60 is erected on the front portion of the first support frame section 22a of each of the pair of first scaffolding sections 20 (excluding the portion corresponding to the second scaffolding section 30).

[0071] Furthermore, the specific configuration of the first handrail section 60 is arbitrary, but in this embodiment it is configured to be movable up and down relative to the first scaffolding section 20.

[0072] 2 to 4, the first support frame portion 22a is provided with an insertion hole (not shown) through which the vertical frame material of the first handrail portion 60 can be inserted, and a stopper material (not shown) that limits the up and down movement of the first handrail portion 60. The first handrail portion 60 is also provided with an engagement control mechanism (not shown) that can maintain and release the engagement between the first handrail portion 60 and the stopper material through a predetermined operation. When the engagement control mechanism releases the engagement between the first handrail portion 60 and the stopper material, the first handrail portion 60 can be made to move up and down via the insertion hole, or when the engagement control mechanism maintains the engagement between the first handrail portion 60 and the stopper material, the first handrail portion 60 can be made to function to limit the up and down movement of the first handrail portion 60.

[0073] Such a first handrail section 60 allows various tasks to be performed safely on the scaffolding 10, and also allows the first handrail section 60 to be moved up and down relative to the first scaffolding section 20 depending on the situation. Therefore, for example, when the engaged state is maintained, the first handrail section 60 can function as a handrail. On the other hand, when the engaged state is released, the first handrail section 60 can be moved downward, which makes it easier to avoid contact between the first handrail section 60 and the structural member 2a or peripheral member 4 during ascending and descending work, although it does not allow the first handrail section 60 to function as a handrail.

[0074] (Configuration - Scaffolding - Second handrail section) Returning to Fig. 2, the second handrail section 70 is intended to prevent a person from falling off the scaffolding 10 by holding on to the second handrail section 70. The second handrail section 70 is made of, for example, a known scaffolding handrail material (for example, a steel scaffolding handrail material) or the like, and is provided on each of the pair of first scaffolding sections 20 as shown in Figs. 2 and 3.

[0075] Specifically, the second handrail section 70 is erected on the rear portion of the first support frame section 22a of each of the pair of first scaffolding sections 20 (excluding the portion corresponding to the third scaffolding section 40), and is fixed to the first support frame section 22a by a fixing device or the like.

[0076] Such a second handrail section 70 allows various tasks to be performed safely on the scaffolding 10.

[0077] The above-described configuration of the scaffolding 10 makes it easier to avoid contact between the scaffolding 10 and the structural members 2a or surrounding members 4 compared to conventional technology (technology in which multiple scaffoldings are simply provided to surround the main body), thereby enabling climbing and descending work to be carried out safely.

[0078] (How to set up scaffolding) Next, a method for installing the scaffolding 10 configured in this manner will be described. Fig. 5 is a plan view showing the installation state when ascending and descending work is performed, and shows the area corresponding to Fig. 2.

[0079] The installation methods for this scaffolding 10 are broadly divided into an installation method (hereinafter referred to as a "first installation method") for when work other than lifting work is to be performed (for example, work to attach members to be installed around the structural member 2a), and an installation method (hereinafter referred to as a "second installation method") for when lifting work is to be performed. Below, the first installation method and the second installation method will each be described.

[0080] (Scaffolding installation method - Installation method 1) First, the first installation method will be described.

[0081] For example, if the installation state of the scaffolding 10 is as shown in Figure 5 before the other work described above is performed, first, the support frames 22 of the pair of first scaffolding sections 20 are rotated to position the pair of first scaffolding sections 20 so that they extend forward.

[0082] Next, the second scaffolding body 31 and the connecting portion 32 are rotated to position the second scaffolding portion 30 so that it abuts against the pair of first scaffolding portions 20.

[0083] Next, at each first handrail section 60, the engagement control mechanism releases the engagement between the first handrail section 60 and the stopper material, and the first handrail section 60 is moved upward through the insertion hole, and then the engagement control mechanism maintains the engagement between the first handrail section 60 and the stopper material.

[0084] By performing the first installation method as described above, the installation state of the scaffolding 10 can be switched to the state shown in Fig. 2. This allows the first scaffolding section 20 and the second scaffolding section 30 to function as scaffolding, making it possible to smoothly perform the other work described above.

[0085] (Scaffolding installation method - Second installation method) Next, the second installation method will be described.

[0086] For example, when the installation state of the scaffolding 10 is as shown in Figure 2 before the other work is performed, first, at each first handrail section 60, the engagement control mechanism is used to release the engagement state between the first handrail section 60 and the stopper material, and the first handrail section 60 is moved downward through the insertion hole.

[0087] Next, a process is performed in which the second scaffolding body 31 and the connecting portion 32 are rotated to position the second scaffolding portion 30 approximately vertically so that the second scaffolding body 31 and the pair of first scaffolding portions 20 do not come into contact with each other.

[0088] Next, the support frames 22 of the pair of first scaffolding sections 20 are rotated to position the left first scaffolding section 20a so that it extends to the left, and the right first scaffolding section 20b so that it extends to the right.

[0089] By performing the second installation method as described above, the installation state of the scaffolding 10 can be switched to the state shown in Fig. 5. This makes it easier to avoid contact between the scaffolding 10 (specifically, the first scaffolding section 20, the second scaffolding section 30, and the first handrail section 60) and the structural member 2a or the peripheral member 4 during ascending and descending work, making it possible to perform ascending and descending work safely.

[0090] (Effects of the embodiment) As described above, according to the embodiment, a pair of first scaffolding sections 20 extend outward from the structural member 2a, each having a first scaffolding body 21 and a support frame 22 supporting the first scaffolding body 21, and a second scaffolding section 30 that is detachably provided between the pair of first scaffolding sections 20. At least one of the support frames 22 of the pair of first scaffolding sections 20 is configured to be able to rotate to change the extension direction of the first scaffolding section 20, so that the extension direction of the first scaffolding section 20 can be changed, and the scaffolding 10 can be installed according to the situation. Therefore, compared to the conventional technology (technology in which multiple scaffoldings are simply provided to surround a body), it is easier to avoid contact between the first scaffolding section 20 and the structural member 2a or surrounding members 4 during the lifting operation of the lifting object H, making it possible to perform the lifting operation safely.

[0091] Furthermore, the second scaffolding section 30 comprises a second scaffolding main body 31 and a connecting section 32 that is connected to one of the pair of first scaffolding sections 20 via a first hinge section 34 and is also connected to the second scaffolding main body 31 via a second hinge section 35, so that the second scaffolding section 30 can be easily attached to and detached from the first scaffolding section 20 without having to rotate at least one of the pair of first scaffolding sections 20. Furthermore, when the second scaffolding section 30 is detached from the first scaffolding section 20, it is easy to position the second scaffolding section 30 in a position that does not interfere with ascending and descending work.

[0092] Furthermore, the third scaffolding section 40 is provided so as not to be able to turn on the structural member 2a side of the first scaffolding main body 21 of the pair of first scaffolding sections 20, and by extending one of the pair of first scaffolding sections 20 in a predetermined direction, the third scaffolding section 40 is provided in a position where it can support the first scaffolding section 20, so that the structural member 2a can be enclosed without any gaps, reducing the possibility of materials falling. Furthermore, the effects of shaking and the like in at least one of the pair of first scaffolding sections 20 can be reduced, and the stability of the installation of the scaffolding 10 can be improved.

[0093] Furthermore, the first handrail section 60 is provided on at least one of the pair of first scaffolding sections 20 and is capable of moving up and down relative to the first scaffolding section 20. Therefore, the first handrail section 60 can be moved up and down relative to the first scaffolding section 20 depending on the situation, making it easier to avoid contact between the first handrail section 60 and the structural member 2a or surrounding member 4 during lifting and lowering operations.

[0094] [III] Modifications to the embodiment Although the embodiments of the present invention have been described above, the specific configurations and means of the present invention can be modified and improved as desired within the scope of the technical ideas of the inventions set forth in the claims. Such modifications will be described below.

[0095] (About the problem to be solved and the effects of the invention) First, the problems that the invention aims to solve and the effects of the invention are not limited to those described above, and the present invention may solve problems that are not described above or achieve effects that are not described above, or may solve only some of the problems that are described or achieve only some of the effects that are described.

[0096] (shape, numbers, structure, time series) The components illustrated in the embodiments and drawings may be modified and improved as desired within the scope of the technical concept of the present invention in terms of shape, numerical value, or the structure or chronological relationship of multiple components.

[0097] (About scaffolding) In the above embodiment, it has been described that the scaffolding 10 comprises the third scaffolding section 40, the fourth scaffolding section 50, the first handrail section 60, and the second handrail section 70, but this is not limited to this, and for example, at least one of the third scaffolding section 40, the fourth scaffolding section 50, the first handrail section 60, or the second handrail section 70 may be omitted.

[0098] In the above embodiment, the number of scaffoldings 10 installed for the structural member 2a is one, but this is not limiting, and for example, a plurality of scaffoldings 10 may be installed. As an example, the plurality of scaffoldings 10 may be installed so as to be spaced apart from each other and generally aligned in the vertical direction.

[0099] Furthermore, in the above embodiment, the scaffolding 10 is described as being attached to the lifting object H, but this is not limiting, and for example, the scaffolding 10 may be attached directly or indirectly to the structural member 2a. In this case, during lifting work on another lifting object (e.g., a construction member) different from the lifting object H, contact between the scaffolding 10 (e.g., the first scaffolding section 20) and the other lifting object may be avoided by installing the scaffolding 10 using the second installation method.

[0100] (Regarding the first scaffolding section) In the above embodiment, it has been described that each of the support frames 22 of the pair of first scaffolding sections 20 is configured to be able to freely change the overhang direction of the first scaffolding section 20 by rotating, but this is not limited to this. For example, only one of the support frames 22 of the pair of first scaffolding sections 20 may be configured to be able to freely change the overhang direction of the first scaffolding section 20 by rotating.

[0101] Furthermore, in the above embodiment, it has been described that the first scaffolding section 20 is provided with the inner scaffolding main body 21b, but this is not limiting, and for example, the inner scaffolding main body 21b may be omitted.

[0102] (Regarding the second scaffolding section) In the above embodiment, the second scaffolding section 30 is described as including the second scaffolding main body 31, the connection section 32, the first hinge section 34, and the second hinge section 35, but is not limited to this.

[0103] For example, the second scaffolding section 30 may include only the second scaffolding main body 31 and a hinge section connecting the second scaffolding main body 31 to either one of the pair of first scaffolding sections 20. In this case, when the second scaffolding main body 31 is rotated, it is preferable to position at least one of the pair of first scaffolding sections 20 so that it projects in a direction other than forward.

[0104] Alternatively, the second scaffolding section 30 may comprise only the second scaffolding body 31 constructed using foldable scaffolding planks.

[0105] (Regarding the first handrail section) In the above embodiment, the first handrail section 60 has been described as being configured to be movable up and down relative to the first scaffolding section 20, but this is not limiting, and for example, it may be configured to be unable to move up and down relative to the first scaffolding section 20. As an example, it may be configured as a foldable handrail material, an extendable handrail material, or a fixed handrail material.

[0106] (Addendum) The scaffolding in Appendix 1 is a scaffolding installed on the outer periphery of a structural member that constitutes a structure, and comprises a pair of first scaffolding sections that extend outward from the structural member, each of which has a first scaffolding body and a support frame that supports the first scaffolding body, and a second scaffolding section that is removably installed between the pair of first scaffolding sections, and at least one of the support frames of the pair of first scaffolding sections is configured to be swiveled so that the extension direction of the first scaffolding section can be freely changed.

[0107] The scaffolding of Appendix 2 is the scaffolding described in Appendix 1, wherein the second scaffolding section comprises a second scaffolding main body and a connecting section connected to either one of the pair of first scaffolding sections via a first hinge section and connected to the second scaffolding main body via a second hinge section.

[0108] The scaffolding of Appendix 3 is a scaffolding described in Appendix 1 or 2, which is a third scaffolding section that is non-rotatably arranged on the structural member side of the pair of first scaffolding sections relative to the first scaffolding main body, and is provided with a third scaffolding section that is positioned in a position where it can support one of the pair of first scaffolding sections by extending it in a predetermined direction.

[0109] The scaffolding of Appendix 4 is a handrail section provided on at least one of the pair of first scaffolding sections in the scaffolding described in any one of Appendixes 1 to 3, and is equipped with a handrail section that can move up and down relative to the first scaffolding section.

[0110] (Effect of supplementary notes) According to the scaffolding described in Appendix 1, the scaffolding comprises a pair of first scaffolding sections that extend outward from a structural member, each of the pair of first scaffolding sections having a first scaffolding body and a support frame that supports the first scaffolding body, and a second scaffolding section that is detachably installed between the pair of first scaffolding sections, and at least one of the support frames of the pair of first scaffolding sections is configured to be able to rotate to change the extension direction of the first scaffolding section, making it possible to change the extension direction of the first scaffolding section and install the scaffolding according to the situation. Therefore, compared to conventional technology (technology in which multiple scaffoldings are simply installed to surround a body), it is easier to avoid contact between the first scaffolding section and the structural member, its surrounding members, or the object to be lifted or lowered during lifting or lowering work, making it possible to perform lifting or lowering work safely.

[0111] According to the scaffolding described in Appendix 2, the second scaffolding section comprises a second scaffolding body and a connecting section connected to either one of the pair of first scaffolding sections via a first hinge section and connected to the second scaffolding body via a second hinge section, so that the second scaffolding section can be easily attached to and detached from the first scaffolding section without rotating at least one of the pair of first scaffolding sections. Also, when the second scaffolding section is detached from the first scaffolding section, it is easy to position the second scaffolding section in a position that does not interfere with climbing and descending work.

[0112] According to the scaffolding described in Supplementary Note 3, the third scaffolding section is provided on the structural member side of the pair of first scaffolding sections and is non-rotatable, and one of the pair of first scaffolding sections is extended in a predetermined direction, so that the third scaffolding section is positioned to be able to support the first scaffolding section, thereby tightly surrounding the structural member and reducing the possibility of materials falling.In addition, the effects of shaking, etc. in at least one of the pair of first scaffolding sections can be reduced, and the stability of the scaffolding installation can be improved.

[0113] According to the scaffolding described in Appendix 4, the handrail section is provided on at least one of a pair of first scaffolding sections and is capable of moving up and down relative to the first scaffolding section. Therefore, the handrail section can be moved up and down relative to the first scaffolding section depending on the situation, making it easier to avoid contact between the handrail section and structural members, their surrounding members, or the object being lifted or lowered during lifting or lowering operations. [Explanation of symbols]

[0114] 1 structure 2 Pillar material 2a Structural members 3 Beam material 4 Peripheral parts 10 Scaffolding 20 First Scaffolding Section 20a Left first scaffolding 20b 1st scaffold on the right side 21 First scaffolding body 21a Outer scaffold body 21b Inner scaffold body 22 Support frame 22a First support frame part 22b Second support frame part 22c Third support frame part 23 First pivot member 23a Swivel axis 30 Second Scaffolding Section 31 Second scaffolding body 32 Connection 33 Movement restriction section 34 First hinge part 35 Second hinge part 40 Third Scaffolding Section 50 4th Scaffolding Section 60 First handrail section 70 Second handrail section H Elevation target M worker

Claims

1. A scaffolding installed around the periphery of a structural member that constitutes a structure, a pair of first scaffolding sections extending outward from the structural member, each of the first scaffolding sections having a first scaffolding body and a support frame supporting the first scaffolding body; A second scaffolding section that is removably provided between the pair of first scaffolding sections, At least one of the support frames of the pair of first scaffolding sections is configured to be able to freely change the extension direction of the first scaffolding section by rotating, The second scaffolding portion is A second scaffolding body; a connecting portion connected to one of the pair of first scaffolding portions via a first hinge portion and connected to the second scaffolding main body via a second hinge portion; scaffold.

2. A handrail section provided on at least one of the pair of first scaffolding sections, the handrail section being capable of moving up and down relative to the first scaffolding section.

2. The scaffolding of claim 1.

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