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 Art

[0002] Conventionally, as one of the techniques for providing a scaffold around the frame (column or wall) of a building under construction, a technique has been proposed in which a plurality of scaffolds are provided so as to surround the frame and are fixed with metal fittings that allow the scaffolds to slide vertically relative to each other (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the technique described in Patent Document 1 above, as described above, since a plurality of scaffolds are provided so as to surround the frame, for example, when lifting and lowering a suspended load using a crane in the vicinity of the plurality of scaffolds, there is a risk that the frame or the suspended load may be damaged due to contact between any of the plurality of scaffolds and the frame or the suspended load. Therefore, there is room for improvement from the viewpoint of safely performing such lifting and lowering operations.

[0005] The present invention has been made in view of the above, and an object thereof is to provide a scaffold that enables safe lifting and lowering operations of an object to be lifted and lowered.

Means for Solving the Problems

[0006] In order to solve the above-described problems and achieve the object, the scaffold according to claim 1 is a scaffold installed on the outer periphery of a structural member constituting a structure, and is a pair of first scaffold portions that project outward from the structural member. The scaffold includes a pair of first scaffold portions each having a first scaffold main body and a support frame that supports the first scaffold main body, and a second scaffold portion that is removably provided between the pair of first scaffold portions. At least one of the support frames of the pair of first scaffold portions is configured to be able to change the projecting direction of the first scaffold portion by turning.

[0007] The scaffold according to claim 2 is the scaffold according to claim 1, wherein the second scaffold portion includes a second scaffold main body, and a connection portion that is connected to one of the pair of first scaffold portions via a first hinge portion and is connected to the second scaffold main body via a second hinge portion.

[0008] The scaffold according to claim 3 is the scaffold according to claim 1 or 2, and is a third scaffold portion that is provided immovably on the structural member side with respect to the first scaffold main body of the pair of first scaffold portions. The scaffold includes a third scaffold portion that is arranged at a position capable of supporting the first scaffold portion when one of the pair of first scaffold portions projects in a predetermined direction.

[0009] The scaffold according to claim 4 is the scaffold according to any one of claims 1 to 3, and is a handrail portion provided on at least one of the pair of first scaffold portions. The scaffold includes a handrail portion that is movable up and down with respect to the first scaffold portion.

Advantages of the Invention

[0010] According to the scaffold described in claim 1, it is a pair of first scaffold parts that project outward from the structural member, and includes a pair of first scaffold parts each having a first scaffold main body and a support frame for supporting the first scaffold main body, and a second scaffold part that is removably provided between the pair of first scaffold parts. Since at least one of the support frames of the pair of first scaffold parts is configured to be able to change the projecting direction of the first scaffold part by turning, the projecting direction of the first scaffold part can be changed, and the scaffold can be installed according to the situation. Therefore, compared with the prior art (a technique of simply providing a plurality of scaffolds so as to surround the structure), it is easier to avoid contact between the first scaffold part and the structural member, its peripheral members, or the object to be lifted during the lifting operation of the object to be lifted and lowered. Thus, it becomes possible to perform the lifting operation safely.

[0011] According to the scaffold described in claim 2, since the second scaffold part includes a connection part that is connected to one of the pair of first scaffold parts via a first hinge part and is connected to the second scaffold main body via a second hinge part, the attachment and detachment operations of the second scaffold part to the first scaffold part can be easily performed without turning at least one of the pair of first scaffold parts. Also, in a state where the second scaffold part is removed from the first scaffold part, it becomes easier to arrange the second scaffold part at a position that does not hinder the lifting operation.

[0012] According to the scaffold described in claim 3, it is a third scaffold part that is provided non-rotatably on the side of the structural member rather than the first scaffold main body of the pair of first scaffold parts, and includes a third scaffold part that is arranged at a position capable of supporting the first scaffold part when one of the pair of first scaffold parts projects in a predetermined direction. Therefore, the structural member can be surrounded without gaps, and the possibility of materials and the like falling can be reduced. Also, the influence of shaking or the like in at least one of the pair of first scaffold parts can be reduced, and the stability of the installation of the scaffold can be enhanced.

[0013] According to the scaffold described in claim 4, it is a handrail provided on at least one of the pair of first scaffold parts, and is provided with a handrail that can move up and down with respect to the first scaffold part. Therefore, the handrail can be moved up and down with respect to the first scaffold part according to the situation, and it becomes easier to avoid contact between the handrail and the structural member, its peripheral members, or the object to be lifted during the lifting operation.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0015] Hereinafter, with reference to the attached drawings, embodiments of the scaffold according to the present invention will be described in detail. First, after explaining the basic concept of [I] the embodiment, [II] the specific content of the embodiment will be described, and finally, [III] modifications to the embodiment will be described. However, the present invention is not limited by the embodiments.

[0016] 〔I〕Basic Concept of the Embodiment First, the basic concept of the embodiment will be explained. The embodiment generally relates to a scaffold installed on the outer periphery of a structural member constituting a structure.

[0017] Here, the specific structure and type of the "structure" are arbitrary. For example, it is a concept that includes architectural structures such as office buildings, public facilities, commercial facilities, and apartment houses (as an example, condominiums, etc.), and civil engineering structures such as bridges. In the embodiment, it will be described as an office building under construction.

[0018] Also, the "structural member" means a part of the constituent elements of a structure and is a member positioned so as to be surrounded by a scaffold. For example, it is a concept that includes the framework of a structure (as an example, column materials, wall materials, etc.) and attachments attached to the framework (as an example, reinforcing members for reinforcing the framework, etc.). In the embodiment, it will be described as a column material of a structure.

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

[0020] Also, the "scaffold" is a structure for a worker to step on during work at a high place. For example, it is a concept that includes a temporary scaffold provided on a structure only during the period when work is being carried out and a permanent scaffold constantly provided on a structure regardless of the period when work is being carried out. In the embodiment, it will be described as a temporary scaffold.

[0021] 〔II〕Specific Content of the Embodiment Next, the specific content of the embodiment will be described.

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

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

[0024] FIG. 1 is a perspective view conceptually showing a scaffold 10 according to an embodiment of the present invention, and is a perspective view showing an installation state when other operations than the lifting operation described later are performed. Here, the X direction in FIG. 1 is the left-right direction or the width direction of the scaffold 10 (-X direction is the left direction of the scaffold 10, +X direction is the right direction of the scaffold 10), the Y direction in FIG. 1 is the front-rear direction of the scaffold 10 (+Y direction is the front direction of the scaffold 10, -Y direction is the rear direction of the scaffold 10), and the Z direction in FIG. 1 is the up-down direction of the scaffold 10 (+Z direction is the upward direction of the scaffold 10, -Z direction is the downward direction of the scaffold 10).

[0025] The structure 1 is, for example, a steel-frame (or reinforced concrete) building structure (specifically, an office building having a plurality of floors under construction), and as shown in FIG. 1, it includes a floor material (not shown), column members 2, beam members 3, and wall materials (not shown).

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

[0027] Further, the column members 2 support the floor materials, and a plurality of them are provided between the floor materials (that is, in the space of each floor of the structure 1). Hereinafter, among the plurality of column members 2, the column member 2a located so as to be surrounded by the scaffold 10 is referred to as a "structural member 2a".

[0028] In the embodiment, behind this structural member 2a, there is provided a lifting object H (for example, a curing frame for curing the structural member 2a, which is a curing frame formed by combining a plurality of steel frame materials) that is lifted and lowered using a lifting means such as a crane (not shown), and is detachably attached to the structural member 2a. Further, hereinafter, the operation of lifting and lowering this lifting object H (specifically, the operation of lifting and lowering the lifting object H and the scaffold 10) is referred to as a "lifting operation".

[0029] Further, the beam members 3 support the floor materials, and a plurality of them are provided at positions where they can contact the lower surfaces of the respective floor materials, or are provided between the floor materials on the same floor.

[0030] In addition, the wall material is for partitioning between the floor materials, and a plurality of them are provided between the floor materials.

[0031] (Configuration - Scaffold) Next, the scaffold 10 will be described.

[0032] FIG. 2 is a plan view of the scaffold 10 in FIG. 1 (partial illustration omitted). Further, FIG. 3 is a cross-sectional view taken along the line A - A in FIG. 2 (partial illustration omitted). Further, FIG. 4 is a cross-sectional view taken along the line B - B in FIG. 2 (partial illustration omitted).

[0033] The scaffold 10 is a structure for a worker M to step on during work at a high place. As shown in FIG. 1, it is provided on the outer periphery of the structural member 2a (in the embodiment, only one is provided and is detachably attached to the object H to be lifted and lowered), and includes a first scaffold part 20, a second scaffold part 30, a third scaffold part 40, a fourth scaffold part 50, a first handrail part 60, and a second handrail part 70.

[0034] (Configuration - Scaffold - First Scaffold Part) The first scaffold part 20 is a part of the basic structure of the scaffold 10. As shown in FIGS. 1 and 2, it is respectively provided on each of the left and right sides of the structural member 2a so as to protrude outward from the structural member 2a (in FIGS. 1 and 2, a pair of first scaffold parts 20 are provided so as to protrude forward), and each includes a first scaffold body 21 and a support frame 22.

[0035] Hereinafter, among the pair of first scaffold parts 20, the first scaffold part 20a located on the left side of the structural member 2a will be referred to as the "left - side first scaffold part 20a", and the first scaffold part 20b located on the right side of the structural member 2a will be referred to as the "right - side first scaffold part 20b" as necessary.

[0036] (Configuration - Scaffold - First Scaffold Part - First Scaffold Body) The first scaffold body 21 is the basic structure of the first scaffold part 20. As shown in FIG. 2, it is provided substantially horizontally in the vicinity of the structural member 2a, and includes an outer - side scaffold body 21a and an inner - side scaffold body 21b.

[0037] Among these, the outer scaffold body 21a is a part of the basic structure of the first scaffold body 21, and is configured using, for example, a known scaffold plate material (as an example, a steel scaffold plate material). As shown in FIG. 2, it is provided at a distance from the structural member 2a.

[0038] Also, the inner scaffold body 21b is another part of the basic structure of the first scaffold body 21, and is configured using, for example, a known scaffold plate material (as an example, a steel scaffold plate material). As shown in FIG. 2, it is provided between the outer scaffold body 21a and the structural member 2a, and is rotatably connected to the outer scaffold body 21a around an axis along the front-rear direction by a hinge portion (such as a hinge, etc.) not shown.

[0039] Also, the specific shapes and sizes of the outer scaffold body 21a and the inner scaffold 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 scaffold body 21a and the planar shape of the inner scaffold body 21b are each set to be substantially rectangular, but it is not limited to this. For example, they may each be set to a shape other than a substantially rectangular shape (such as a substantially elliptical shape, etc.).

[0041] Also, the length of the outer scaffold body 21a in the left-right direction is set to be shorter than the length of the structural member 2a in the left-right direction, but it is not limited to this. For example, it may be set to be equal to or longer than the length of the structural member 2a in the left-right direction. Also, the length of the outer scaffold body 21a in the front-rear direction is set to be longer than the length of the structural member 2a in the front-rear direction, but it is not limited to this. For example, it may be set to be equal to or shorter than the length of the structural member 2a in the front-rear direction. Also, the length (thickness) of the outer scaffold body 21a in the up-down direction is set to a thickness capable of supporting a predetermined load.

[0042] Also, the length of the inner scaffold body 21b in the left-right direction is set to be shorter than the length of the outer scaffold body 21a in the left-right direction. Also, the length of the inner scaffold body 21b in the front-rear direction is set to be longer than the length of the outer scaffold body 21a in the front-rear direction. Also, the length (thickness) of the inner scaffold body 21b in the up-down direction is set to a thickness capable of supporting a predetermined load.

[0043] (Configuration - Scaffold - First Scaffold Part - Support Frame) Returning to FIG. 1, the support frame 22 is for supporting the first scaffold body 21, and as shown in FIGS. 1 to 3, it is provided in the vicinity of the first scaffold body 21.

[0044] Also, 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 scaffold parts 20 is configured to be able to change the protruding direction of the first scaffold part 20 by turning.

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

[0046] (Configuration - Scaffold - First Scaffold Part - Support Frame - First Support Frame Part) The first support frame part 22a is a part of the basic structure of the support frame 22. This first support frame part 22a is configured by combining, for example, a known scaffold frame material (as an example, a steel scaffold frame material, etc.) by means of fixtures or welding, etc., and as shown in FIGS. 2 and 3, it is provided so as to cover the periphery of the first scaffold body 21.

[0047] (Configuration - Scaffold - First Scaffold Part - Support Frame - Second Support Frame Part) The second support frame part 22b is another part of the basic structure of the support frame 22. This second support frame part 22b is configured using, for example, a known scaffold frame material (as an example, a steel scaffold frame material, etc.), and as shown in FIG. 3, it is provided below the first support frame part 22a.

[0048] Specifically, the front end part of the second support frame part 22b is inclined and arranged so as to be positioned above the rear end part of the second support frame part 22b, and the front end part of the second support frame part 22b is connected to the first support frame part 22a by a fixture or the like.

[0049] (Configuration - Scaffold - First Scaffold Part - Support Frame - Third Support Frame Part) The third support frame part 22c is another part of the basic structure of the support frame 22. This third support frame part 22c is configured using, for example, a known scaffold frame material (as an example, a steel scaffold frame material, etc.), and as shown in FIG. 3, it is provided substantially vertically behind the first support frame part 22a and the second support frame part 22b.

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

[0051] In the embodiment, when preventing the third support frame part 22c from turning unintentionally, a turning restriction part (not shown in the figure. For example, a stopper material, etc.) for restricting the turning of the third support frame part 22c is detachably attached to the upper first turning member 23 among the pair of first turning members 23 through a through hole not shown in the figure with respect to the first turning member 23.

[0052] With such a configuration of the support frame 22, the overhanging direction of the first scaffold portion 20 can be changed, and the scaffold 10 can be installed according to the situation.

[0053] With the first scaffold portion 20 as described above, it becomes easier to avoid contact between the first scaffold portion 20 and the structural member 2a or the member 4 of another structure 1 (for example, a beam member 3 or a column member 2, etc.; hereinafter referred to as "peripheral member 4") during the lifting operation.

[0054] (Configuration - Scaffold - Second Scaffold Portion) Returning to FIG. 1, the second scaffold portion 30 is another part of the basic structure of the scaffold 10. As shown in FIGS. 1, 2, and 4, this second scaffold portion 30 is removably provided between a pair of first scaffold portions 20 and includes a second scaffold main body 31 and a connecting portion 32.

[0055] (Configuration - Scaffold - Second Scaffold Portion - Second Scaffold Main Body) Returning to FIG. 2, the second scaffold main body 31 is the basic structure of the second scaffold portion 30. This second scaffold main body 31 is configured using, for example, a known scaffold plate material (as an example, a steel scaffold plate material), and as shown in FIG. 2, it is provided so as to be able to contact the front side portion of each of the pair of first scaffold portions 20 above the pair of first scaffold portions 20.

[0056] Also, although the specific shape and size of the second scaffold main body 31 are arbitrary, in the embodiment, they are set as follows.

[0057] That is, as shown in FIG. 2, the planar shape of the second scaffold main body 31 is set to be substantially rectangular, respectively, but it is not limited to this. For example, it may be set to a shape other than a substantially rectangular shape (for example, a substantially elliptical shape, etc.), respectively.

[0058] In addition, regarding the length of the second scaffold body 31 in the left - right direction, it is set to be longer than the length of the structural member 2a in the left - right direction. Regarding the length of the second scaffold body 31 in the front - rear direction, it is set to be shorter than the length of the structural member 2a in the front - rear direction, but it is not limited to this. For example, it may be set to be equal to or longer than the length of the structural member 2a in the front - rear direction. Regarding the length (thickness) of the second scaffold body 31 in the up - down direction, it is set to a thickness capable of supporting a predetermined load.

[0059] Note that in the embodiment, as shown in FIG. 2, when holding the state of being in contact with the front - side portions of each of the pair of first scaffold portions 20, a movement restricting portion 33 (for example, a stopper material or the like) for restricting the movement of the second scaffold body 31 is detachably attached to either one of the pair of first scaffold portions 20 (in FIG. 2, the left - side first scaffold portion 20a).

[0060] (Configuration - Scaffold - Second Scaffold Portion - Connection Portion) The connection portion 32 is for connecting the second scaffold body 31 and either one of the pair of first scaffold portions 20 (in the embodiment, the right - side first scaffold portion 20b). This second scaffold body 31 is configured using, for example, a known connection member (as an example, a steel connection member shorter than the longitudinal direction of the second scaffold body 31), and is provided in the vicinity of the right - side first scaffold portion 20b as shown in FIG. 4.

[0061] Also, the method of connecting the second scaffold body 31 and either one of the pair of first scaffold portions 20 using the connection portion 32 is arbitrary. In the embodiment, the connection portion 32 and either one of the pair of first scaffold portions 20 are connected via a first hinge portion 34, and the connection portion 32 and the second scaffold body 31 are connected via a second hinge portion 35. Among these, the first hinge portion 34 is a member for enabling the connection portion 32 to pivot around an axis along the front - rear direction, and the second hinge portion 35 is a member for enabling the second scaffold body 31 to pivot around an axis along the front - rear direction.

[0062] Specifically, as shown in FIG. 4, the right end portion of the connecting portion 32 and the first scaffold portion 20b on the right side are connected via the first hinge portion 34, and the left end portion of the connecting portion 32 and the right end portion of the second scaffold main body 31 or the vicinity thereof are connected via the second hinge portion 35.

[0063] With such a second scaffold portion 30, the attachment work and detachment work of the second scaffold portion 30 to / from the first scaffold portion 20 can be easily performed without rotating at least one of the pair of first scaffold portions 20. Further, as shown in FIG. 4, in a state where the second scaffold portion 30 is detached from the first scaffold portion 20, it becomes easy to arrange the second scaffold portion 30 at a position that does not hinder the lifting work.

[0064] (Configuration - Scaffold - Third Scaffold Portion) Returning to FIG. 2, the third scaffold portion 40 is another part of the basic structure of the scaffold 10. This third scaffold portion 40 is configured using, for example, a known scaffold plate material (as an example, a steel scaffold plate material), and as shown in FIG. 2, it is respectively provided non - rotatably on the left - hand side and the right - hand side of the structural member 2a, on the side of the structural member 2a rather than the first scaffold main body 21 of the pair of first scaffold portions 20 (that is, a pair of third scaffold portions 40 are provided).

[0065] Specifically, each of the pair of third scaffold portions 40 is respectively arranged at a position where it can support the first scaffold portion when one of the pair of first scaffold portions projects in a predetermined direction, and is respectively connected to the lifting target H by a fixture or the like. More specifically, as shown in FIG. 2, the left - hand third scaffold portion 40 is arranged so as to contact the lower surface of the inner scaffold main body 21b and / or the lower surface of the first support frame portion 22a of the left - hand first scaffold portion 20a when the left - hand first scaffold portion 20a projects forward. Also, the right - hand third scaffold portion 40 is arranged so as to contact the lower surface of the inner scaffold main body 21b and / or the lower surface of the first support frame portion 22a of the right - hand first scaffold portion 20b when the right - hand first scaffold portion 20b projects forward.

[0066] With such a third scaffold portion 40, the structural member 2a can be surrounded without gaps, and the possibility of materials or the like falling can be reduced. Further, the influence of shaking or the like in either one of at least a pair of first scaffold portions 20 can be reduced, and the stability of the installation of the scaffold can be enhanced.

[0067] (Configuration - Scaffold - Fourth Scaffold Portion) The fourth scaffold portion 50 is another part of the basic structure of the scaffold 10. This fourth scaffold portion 50 is configured using, for example, a known scaffold board material (as an example, a steel scaffold board material), and as shown in FIG. 2, it is provided between a pair of third scaffold portions 40 on the rear side of the structural member 2a. Specifically, it is respectively connected to the lifting object H by a fixture or the like, and is pivotally connected about an axis along the left - right direction by a second pivoting member (for example, a gas spring or the like) attached to the lifting object H and not shown in the figure.

[0068] With such a fourth scaffold portion 50, the structural member 2a can be surrounded even more without gaps, and the possibility of materials or the like falling can be further reduced.

[0069] (Configuration - Scaffold - First Handrail Portion) Returning to FIG. 1, the first handrail portion 60 is a handrail portion for preventing a person from falling from the scaffold 10 by grasping the first handrail portion 60. This first handrail portion 60 is configured using, for example, a known scaffold handrail material (as an example, a steel scaffold handrail material), and as shown in FIGS. 1 and 2, it is provided on each of a pair of first scaffold portions 20.

[0070] Specifically, the first handrail portion 60 is respectively erected on the front - side portion (however, excluding the portion corresponding to the second scaffold portion 30) of the first support frame portion 22a of each of the pair of first scaffold portions 20.

[0071] Also, although the specific configuration of the first handrail portion 60 is arbitrary, in the embodiment, it is configured to be vertically movable with respect to the first scaffold portion 20.

[0072] Specifically, as shown in FIGS. 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) for restricting the vertical movement of the first handrail portion 60. Further, the first handrail portion 60 is provided with an engagement control mechanism (not shown) capable of holding and releasing the engagement state between the first handrail portion 60 and the stopper material by a predetermined operation. When the engagement state between the first handrail portion 60 and the stopper material is released by the engagement control mechanism, the first handrail portion 60 can be vertically moved through the insertion hole, and when the engagement state between the first handrail portion 60 and the stopper material is held by the engagement control mechanism, the first handrail portion 60 can be made to function so as to restrict the vertical movement of the first handrail portion 60.

[0073] With such a first handrail portion 60, various operations can be safely performed on the scaffold 10, and the first handrail portion 60 can be vertically moved relative to the first scaffold portion 20 according to the situation. Therefore, for example, when the above engagement state is maintained, the first handrail portion 60 can function as a handrail. On the other hand, when the above engagement state is released, although the first handrail portion 60 cannot function as a handrail by moving the first handrail portion 60 downward, it becomes easier to avoid contact between the first handrail portion 60 and the structural member 2a or the peripheral member 4 during the lifting and lowering operation.

[0074] (Configuration - Scaffold - Second Handrail Portion) Returning to FIG. 2, the second handrail portion 70 is for preventing a person from falling from the scaffold 10 by grasping the second handrail portion 70. This second handrail portion 70 is configured using, for example, a known handrail material for a scaffold (as an example, a steel handrail material for a scaffold), and is provided on each of the pair of first scaffold portions 20 as shown in FIGS. 2 and 3.

[0075] Specifically, the second handrail portion 70 is erected on the rear side portion of each of the first support frame portions 22a of the pair of first scaffold portions 20 (however, excluding the portion corresponding to the third scaffold portion 40), and is fixed to the first support frame portion 22a by a fixture or the like.

[0076] With such a second handrail portion 70, various operations on the scaffold 10 can be performed safely.

[0077] Due to the configuration of the scaffold 10 as described above, compared with the prior art (a technique of providing a plurality of scaffolds so as to simply surround the body), it becomes easier to avoid contact between the scaffold 10 and the structural member 2a or the peripheral member 4, and thus it becomes possible to perform the lifting operation safely.

[0078] (Regarding the installation method of the scaffold) Subsequently, the installation method of the scaffold 10 configured as described above will be described. FIG. 5 is a plan view showing the installation state when the lifting operation is performed, and is a view showing the region corresponding to FIG. 2.

[0079] The installation method of this scaffold 10 is roughly classified into an installation method (hereinafter referred to as the "first installation method") when other operations (for example, the installation work of members installed around the structural member 2a, etc.) other than the lifting operation are performed, and an installation method (hereinafter referred to as the "second installation method") when the lifting operation is performed. Hereinafter, each of the first installation method and the second installation method will be described.

[0080] (Regarding the installation method of the scaffold - the first installation method) First, the first installation method will be described.

[0081] For example, when the installation state of the scaffold 10 is the state shown in FIG. 5 before the above other operations are performed, first, by rotating the support frames 22 of the pair of first scaffold portions 20, a step of arranging the pair of first scaffold portions 20 so as to project forward is performed.

[0082] Next, by rotating the second scaffold main body 31 and the connecting portion 32, a step of arranging the second scaffold portion 30 so as to abut against the pair of first scaffold portions 20 is performed.

[0083] Subsequently, in each first handrail portion 60, the engagement control mechanism releases the engagement state between the first handrail portion 60 and the stopper member, moves the first handrail portion 60 upward through the insertion hole, and then the engagement control mechanism holds the engagement state between the first handrail portion 60 and the stopper member.

[0084] By performing the first installation method as described above, the installation state of the scaffold 10 can be switched to the state shown in FIG. 2. Thereby, the first scaffold portion 20 and the second scaffold portion 30 can function as scaffolds, and the above-mentioned other operations can be performed smoothly.

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

[0086] For example, when the installation state of the scaffold 10 is the state shown in FIG. 2 before the above-mentioned other operations are performed, first, in each first handrail portion 60, the engagement control mechanism releases the engagement state between the first handrail portion 60 and the stopper member, and moves the first handrail portion 60 downward through the insertion hole.

[0087] Next, by rotating the second scaffold body 31 and the connecting portion 32, the second scaffold portion 30 is arranged substantially vertically so that the second scaffold body 31 does not contact the pair of first scaffold portions 20.

[0088] Subsequently, by rotating the support frames 22 of the pair of first scaffold portions 20, the left first scaffold portion 20a is projected leftward and the right first scaffold portion 20b is projected rightward.

[0089] By performing the second installation method as described above, the installation state of the scaffold 10 can be switched to the state shown in FIG. 5. As a result, during the lifting operation, it is easier to avoid contact between the scaffold 10 (specifically, the first scaffold portion 20, the second scaffold portion 30, and the first handrail portion 60) and the structural member 2a or the peripheral member 4, so that the lifting operation can be performed safely.

[0090] (Effect of the Embodiment) According to the embodiment in this way, there are a pair of first scaffold portions 20 that project outward from the structural member 2a, and a pair of first scaffold portions 20 each having a first scaffold main body 21 and a support frame 22 that supports the first scaffold main body 21. Between the pair of first scaffold portions 20, a second scaffold portion 30 is detachably provided. Since at least one of the support frames 22 of the pair of first scaffold portions 20 is configured to be able to change the projecting direction of the first scaffold portion 20 by turning, the projecting direction of the first scaffold portion 20 can be changed, and the scaffold 10 can be installed according to the situation. Therefore, compared with the prior art (a technique of providing a plurality of scaffolds so as to simply surround the structure), it is easier to avoid contact between the first scaffold portion 20 and the structural member 2a or the peripheral member 4 during the lifting operation of the lifting target H, so that the lifting operation can be performed safely.

[0091] In addition, since the second scaffold portion 30 includes a second scaffold main body 31 and a connection portion 32 that is connected to one of the pair of first scaffold portions 20 via a first hinge portion 34 and is connected to the second scaffold main body 31 via a second hinge portion 35, the attachment work and removal work of the second scaffold portion 30 to / from the first scaffold portion 20 can be easily performed without turning at least one of the pair of first scaffold portions 20. Further, in a state where the second scaffold portion 30 is removed from the first scaffold portion 20, it is easy to arrange the second scaffold portion 30 at a position that does not hinder the lifting operation.

[0092] In addition, there is a third scaffold portion 40 that is provided non-rotatably on the side of the structural member 2a rather than the first scaffold main body 21 of the pair of first scaffold portions 20. Since the third scaffold portion 40 is arranged at a position where it can support the first scaffold portion 20 when one of the pair of first scaffold portions 20 projects in a predetermined direction, the structural member 2a can be surrounded without gaps, and the possibility of falling of materials and the like can be reduced. Further, the influence of shaking or the like in at least one of the pair of first scaffold portions 20 can be reduced, and the stability of the installation of the scaffold 10 can be enhanced.

[0093] Moreover, it is the first handrail portion 60 provided on at least one of the pair of first scaffold portions 20, and includes the first handrail portion 60 that can move up and down with respect to the first scaffold portion 20. Therefore, the first handrail portion 60 can be moved up and down with respect to the first scaffold portion 20 according to the situation, and it becomes easier to avoid contact between the first handrail portion 60 and the structural member 2a or the peripheral member 4 during the lifting operation.

[0094] [III] Modifications to the Embodiment As described above, the embodiments of the present invention have been described. However, the specific configurations and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. Hereinafter, such modifications will be described.

[0095] (Regarding the problems to be solved and the effects of the invention) First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described content. According to the present invention, it is also possible to solve problems not described above or to achieve effects not described above. Further, it may solve only some of the described problems or achieve only some of the described effects.

[0096] (Regarding shape, numerical value, structure, time series) Regarding the components exemplified in the embodiment and the drawings, the shape, numerical value, or the structure or time series mutual relationship of a plurality of components can be arbitrarily modified and improved within the scope of the technical idea of the present invention.

[0097] (Regarding the scaffold) In the above embodiment, it was described that the scaffold 10 includes the third scaffold portion 40, the fourth scaffold portion 50, the first handrail portion 60, and the second handrail portion 70. However, it is not limited to this. For example, at least one of the third scaffold portion 40, the fourth scaffold portion 50, the first handrail portion 60, or the second handrail portion 70 may be omitted.

[0098] In the above-described embodiment, it was explained that the number of scaffolds 10 installed on the structural member 2a is one, but it is not limited to this. For example, a plurality of scaffolds may be installed. As an example, the plurality of scaffolds 10 may be provided so as to be spaced apart from each other and substantially along the vertical direction.

[0099] In the above-described embodiment, it was explained that the scaffold 10 is attached to the object H to be lifted, but it is not limited to this. For example, it may be directly or indirectly attached to the structural member 2a. In this case, during the lifting operation of another object to be lifted (for example, a construction member or the like) different from the object H to be lifted, by installing the scaffold 10 by the above-described second installation method, contact between the scaffold 10 (for example, the first scaffold portion 20) and the other object to be lifted may be avoided.

[0100] (Regarding the first scaffold portion) In the above-described embodiment, it was explained that each of the support frames 22 of the pair of first scaffold portions 20 is configured to be able to change the protruding direction of the first scaffold portion 20 by turning, but it is not limited to this. For example, only one of the support frames 22 of the pair of first scaffold portions 20 may be configured to be able to change the protruding direction of the first scaffold portion 20 by turning.

[0101] In the above-described embodiment, it was explained that the first scaffold portion 20 includes the inner scaffold body 21b, but it is not limited to this. For example, the inner scaffold body 21b may be omitted.

[0102] (Regarding the second scaffold portion) In the above-described embodiment, it was explained that the second scaffold portion 30 includes the second scaffold body 31, the connecting portion 32, the first hinge portion 34, and the second hinge portion 35, but it is not limited to this.

[0103] For example, the second scaffold portion 30 may include only the second scaffold body 31 and a hinge portion that connects the second scaffold body 31 to either one of the pair of first scaffold portions 20. In this case, when turning the second scaffold body 31, it is preferable to arrange at least one of the pair of first scaffold portions 20 so as to protrude in a direction other than the front.

[0104] Alternatively, the second scaffold part 30 may include only a second scaffold main body 31 configured using a foldable scaffold plate material.

[0105] (Regarding the first handrail part) In the above-described embodiment, it has been described that the first handrail part 60 is configured to be vertically movable with respect to the first scaffold part 20. However, the present invention is not limited thereto. For example, it may be configured to be non-vertically movable with respect to the first scaffold part 20. As an example, it may be configured using a foldable handrail material, a telescopic handrail material, or a fixed handrail material.

[0106] (Supplementary Note) The scaffold of Supplementary Note 1 is a scaffold installed on the outer periphery of a structural member constituting a structure, and is a pair of first scaffold parts that project outward from the structural member. The scaffold includes a pair of first scaffold parts each having a first scaffold main body and a support frame for supporting the first scaffold main body, and a second scaffold part removably provided between the pair of first scaffold parts. At least one of the support frames of the pair of first scaffold parts is configured to be able to change the projecting direction of the first scaffold part by turning.

[0107] The scaffold of Supplementary Note 2 is the scaffold described in Supplementary Note 1, wherein the second scaffold part includes a second scaffold main body, and a connection part connected to one of the pair of first scaffold parts via a first hinge part and connected to the second scaffold main body via a second hinge part.

[0108] The scaffold of Supplementary Note 3 is the scaffold described in Supplementary Note 1 or 2, and is a third scaffold part provided non-rotatably on the structural member side of the first scaffold main body of the pair of first scaffold parts. When one of the pair of first scaffold parts projects in a predetermined direction, the scaffold includes a third scaffold part arranged at a position capable of supporting the first scaffold part.

[0109] The scaffold of Supplementary Note 4 is a handrail portion provided on at least one of the pair of first scaffold portions in the scaffold described in any one of Supplementary Notes 1 to 3, and includes a handrail portion that is vertically movable with respect to the first scaffold portion.

[0110] (Effect of Supplementary Note) According to the scaffold described in Supplementary Note 1, a pair of first scaffold portions that project outward from the structural member, a pair of first scaffold portions each having a first scaffold body and a support frame that supports the first scaffold body, and a second scaffold portion that is removably provided between the pair of first scaffold portions. Since at least one of the support frames of the pair of first scaffold portions is configured to be able to change the projecting direction of the first scaffold portion by turning, the projecting direction of the first scaffold portion can be changed, and the scaffold can be installed according to the situation. Therefore, compared with the prior art (a technique of simply providing a plurality of scaffolds so as to surround the building structure), it is easier to avoid contact between the first scaffold portion and the structural member, its peripheral members, or the object to be lifted during the lifting operation of the object to be lifted. Thus, the lifting operation can be performed safely.

[0111] According to the scaffold described in Supplementary Note 2, since the second scaffold portion includes a connection portion that is connected to one of the pair of first scaffold portions via a first hinge portion and is connected to the second scaffold body via a second hinge portion, the attachment and detachment operations of the second scaffold portion to and from the first scaffold portion can be easily performed without turning at least one of the pair of first scaffold portions. Also, in a state where the second scaffold portion is removed from the first scaffold portion, it becomes easier to arrange the second scaffold portion at a position that does not hinder the lifting operation.

[0112] According to the scaffold described in Supplementary Note 3, it is a third scaffold part that is provided immovably on the structural member side with respect to the first scaffold main body of the pair of first scaffold parts. Since one of the pair of first scaffold parts is projected in a predetermined direction and includes a third scaffold part that is arranged at a position capable of supporting the first scaffold part, the structural member can be surrounded without gaps, and the possibility of falling of materials or the like can be reduced. Further, it is possible to reduce the influence of shaking or the like in at least one of the pair of first scaffold parts, and the stability of the installation of the scaffold can be enhanced.

[0113] According to the scaffold described in Supplementary Note 4, it is a handrail part provided on at least one of the pair of first scaffold parts, and includes a handrail part that can move up and down with respect to the first scaffold part. Therefore, the handrail part can be moved up and down with respect to the first scaffold part according to the situation, and it becomes easier to avoid contact between the handrail part and the structural member, its peripheral members, or the object to be lifted and lowered during the lifting and lowering operation.

Explanation of Signs

[0114] 1 Structure 2 Column member 2a Structural member 3 Beam member 4 Peripheral member 10 Scaffold 20 First scaffold part 20a Left first scaffold part 20b Right first scaffold part 21 First scaffold main body 21a Outer scaffold main body 21b Inner scaffold main body 22 Support frame 22a First support frame part 22b Second support frame part 22c Third support frame part 23 First swivel member 23a Swivel shaft 30 Second scaffold part 31 Second scaffold main body 32 Connection part 33 Movement restriction part 34 First hinge part 35 Second hinge part 40 Third Scaffold Part 50 Fourth Scaffold Part 60 First Handrail Part 70 Second Handrail Part H Object to be Lifted and Lowered M Operator

Claims

1. A scaffolding that is 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 pair of first scaffolding sections having a first scaffolding body and a support frame supporting the first scaffolding body; A second scaffold portion is provided between the pair of first scaffold portions in a removable manner, 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. scaffold.

2. The second scaffold portion is A second scaffold body; A connection part connected to one of the pair of first scaffold parts via a first hinge part and connected to the second scaffold main body via a second hinge part.

2. The scaffolding of claim 1.

3. a third scaffold section that is non-rotatably provided on the structural member side of the first scaffold body of the pair of first scaffold sections, and the third scaffold section is disposed in a position capable of supporting the first scaffold section by extending one of the pair of first scaffold sections in a predetermined direction; 3. A scaffold according to claim 1 or 2.

4. A handrail section provided on at least one of the pair of first scaffold sections, the handrail section being movable up and down relative to the first scaffold section; 4. A scaffold according to any one of claims 1 to 3.

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