Suspended scaffold expansion method and support member for expansion scaffold

Abstract

To provide a suspended scaffold expansion method capable of efficiently performing work for expanding a suspended scaffold SOLUTION: The suspension scaffold expansion method includes a scaffold frame preparation step of preparing an expansion scaffold frame 70 in which a plurality of pipes are connected to each other on the suspension scaffold 100, a support member mounting step of mounting the mounting part 10 of the support member 1 on a part of the plurality of pipes of the expansion scaffold frame 70, an expansion scaffold frame moving step of lifting the expansion scaffold frame 70 by using an expansion scaffold frame lifting device M and moving the expansion scaffold frame 70 to the outside of the suspension scaffold 100, an expansion scaffold frame support step of supporting the expansion scaffold frame 70 on the suspension scaffold 100 so that the support part 20 of the support member 1 is placed on the suspension scaffold 100, and an expansion scaffold frame connection step of connecting pipes other than the pipes supported by the support member 1 to the suspension scaffold 100 and then connecting the pipes from which the support member 1 is removed to the suspension scaffold 100.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a suspended scaffolding expansion method for expanding a suspended scaffolding relative to an existing scaffolding, and to a support member for supporting an expansion scaffolding used when expanding a suspended scaffolding. [Background technology]

[0002] A method for extending a suspended scaffolding from an existing scaffolding is known. For example, Patent Document 1 discloses a method for extending a suspended scaffolding including a plurality of main single pipes and a plurality of sub-single pipes tied to the main single pipes, by sending the sub-single pipes outward from the existing scaffolding.

[0003] Specifically, in Patent Document 1, a temporary single pipe is first suspended from a building pipe directly above the secondary single pipe of the existing scaffolding so that it can be extended outside the existing scaffolding. Next, a connecting member is used to connect the tip of a new secondary single pipe to the tip of the existing scaffolding secondary single pipe, and a hanging member is used to connect the new secondary single pipe approximately two-fifths of the way from its tip to a support pipe on the existing scaffolding. Next, the new secondary single pipe is extended outside the existing scaffolding so that it is suspended from the temporary single pipe via the connecting member and the hanging member. Next, a new main single pipe is tied to the underside of the new secondary single pipe while a scaffolding board is hung across it, and the new main single pipe is hung from the building pipe using a chain or the like. After that, the hanging member is removed from the new secondary single pipe, the scaffolding board is hung to the specified position, the connecting member is removed, and a finishing board is laid to obtain an expanded scaffolding. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2013-221324 Summary of the Invention [Problem to be solved by the invention]

[0005] In the method disclosed in Patent Document 1, in order to install a new extension scaffolding on an existing scaffolding, a worker must attach a connecting member and a hanging member to each of the new sub-pipes to be connected. The worker must then feed the new sub-pipes one by one outside the existing scaffolding. Therefore, the worker must connect the fed sub-pipes to the existing scaffolding, stand on a scaffolding board suspended over the sub-pipes, and connect the sub-pipes to the new main pipe placed below them outside the scaffolding board. Therefore, the installation work of the extension scaffolding is complicated, and the work of expanding the suspended scaffolding may take a long time.

[0006] In response to this, for example, a method can be considered in which an expansion scaffold (scaffolding frame) is formed by assembling multiple sub-single pipes and main single pipes in a frame shape on the existing scaffolding, and then this scaffolding frame is connected to the existing scaffolding. With this method, the multiple sub-single pipes can be sent out together outside the existing scaffolding, and the work of connecting the multiple sub-single pipes and the main single pipe outside the existing scaffolding is also unnecessary.

[0007] However, in order to connect such a scaffolding frame to an existing scaffolding, the scaffolding frame must be lifted out of the existing scaffolding. To do this, a worker must lift the entire scaffolding frame out of the existing scaffolding, for example, using a scaffolding frame lifting device that lifts the scaffolding frame relative to the existing scaffolding or structure. At this time, there is a possibility that the ends of the multiple sub-single pipes connected to the existing scaffolding may rotate and move around the connection points of the scaffolding frame with the scaffolding frame lifting device. Therefore, a worker must support each end of the multiple sub-single pipes to prevent them from rotating and moving.

[0008] Therefore, there is a demand for a method for expanding a suspended scaffold that can efficiently perform the work of expanding a suspended scaffold.

[0009] An object of the present invention is to provide a method for expanding a suspended scaffolding that can efficiently perform the work of expanding a suspended scaffolding. [Means for solving the problem]

[0010] A suspended scaffolding expansion method according to one embodiment of the present invention is a suspended scaffolding expansion method for expanding a suspended scaffolding relative to an existing scaffolding. The suspended scaffolding expansion method includes an expansion scaffolding frame preparation process for preparing an expansion scaffolding frame on the existing scaffolding, in which a plurality of longitudinally extending pipes are connected together widthwise; a support member attachment process for attaching one end of a support member extending in one direction to the end of some of the plurality of pipes of the expansion scaffolding frame; an expansion scaffolding frame movement process for lifting the expansion scaffolding frame with the attached support member using an expansion scaffolding lifting device and moving it outside the existing scaffolding; an expansion scaffolding frame support process for placing the other end of the support member on the existing scaffolding to support the expansion scaffolding frame with respect to the existing scaffolding; and an expansion scaffolding frame connection process for connecting the ends of the pipes other than the some of the pipes of the expansion scaffolding frame supported by the support members to the existing scaffolding, and then connecting the ends of the some of the pipes from which the support members have been removed to the existing scaffolding (first method).

[0011] According to the above-mentioned method, the extension scaffolding frame to which the multiple pipes are connected can be prepared on the existing scaffolding and then sent out to the outside of the existing scaffolding. Therefore, since the multiple pipes are sent out to the outside of the existing scaffolding in a connected state, workability can be improved compared to when single pipes are sent out one by one and connected outside the existing scaffolding.

[0012] When connecting the extension scaffolding frame to the existing scaffolding, the extension scaffolding frame is hoisted using an extension scaffolding hoisting device so that the ends of the multiple pipes in the extension scaffolding frame are positioned outside the existing scaffolding. At this time, the ends of the multiple pipes constituting the extension scaffolding frame must be supported by multiple workers so that the extension scaffolding frame does not rotate around the connection position of the extension scaffolding frame with the scaffolding frame hoisting device and move.

[0013] In the above-described method, one end of a support member is attached to the end of a part of the pipe of the expansion scaffolding frame, and then the expansion scaffolding frame is lifted up outside the existing scaffolding and the other end of the support member is placed on the existing scaffolding, thereby supporting the expansion scaffolding frame against the existing scaffolding.

[0014] Therefore, when the extension scaffolding frame is lifted using the extension scaffolding lifting device so that the ends of the multiple pipes in the extension scaffolding frame are positioned outside the existing scaffolding, the extension scaffolding frame does not rotate around the connection position with the extension scaffolding lifting device and does not move. Therefore, since there is no need to support the pipes to which the support members are attached, the number of workers supporting the extension scaffolding frame can be reduced. Therefore, even a smaller number of workers can connect the extension scaffolding frame to the existing scaffolding.

[0015] Therefore, a method for expanding a suspended scaffolding can be provided that allows the work of expanding a suspended scaffolding to be carried out efficiently.

[0016] In the first method, in the support member mounting process, the support member is positioned relative to the tip of the part of the pipe of the expansion scaffolding frame by a positioning portion located between the one end side and the other end side of the support member (second method).

[0017] According to the above-described method, the support member can be positioned relative to the tip of a portion of the tube of the expansion scaffolding frame by the positioning portion, so that the support member can be easily attached to the end of the portion of the tube.

[0018] In the second method, in the support member installation process, one end of the support member is inserted into the end of a portion of the tube of the expansion scaffolding frame, and the positioning portion protruding in a direction intersecting the extension direction of the support member is brought into contact with the tip of the portion of the tube to position it (third method).

[0019] According to the above-described method, by inserting one end of the support member into the end of a tube of the expandable scaffolding frame, the position of the support member relative to the expandable scaffolding frame can be determined by the positioning part, thereby making it possible to easily position and attach the support member to the end of the tube of the expandable scaffolding frame.

[0020] In the second method, in the support member mounting process, the support member is positioned relative to the tip of a portion of the pipe of the expansion scaffolding frame by a positioning part, and the position of the support member relative to the end of the portion of the pipe is fixed by a fixing member (fourth method).

[0021] This allows the support members to be positioned and fixed to the ends of the pipes of the expansion scaffolding frame by the fixing members, thereby preventing the support members from slipping out of the ends of the pipes, and thus allowing the expansion scaffolding frame to be more reliably supported by the support members against the existing scaffolding.

[0022] In the first method, the other end of the support member has a flat plate shape with a width dimension greater than a thickness dimension. In the expansion scaffolding frame supporting step, one end of the support member is attached to an end of a pipe of the expansion scaffolding frame, and one end of the other end in the width direction of the support member is brought into contact with the existing scaffolding (fifth method).

[0023] According to the above-described method, the other end of the support member can be placed on the existing scaffolding in such a position that the width direction of the other end of the support member coincides with the vertical direction.

[0024] Here, the other end of the support member has a flat plate shape with a width dimension greater than a thickness dimension, and therefore has higher rigidity in the width direction than in the thickness direction, so that the other end of the support member is less likely to bend in the vertical direction when the width direction is aligned with the vertical direction.

[0025] This allows the extension scaffolding frame to be supported on the existing scaffolding using the other end of the support member, which is less likely to bend vertically. Therefore, workers can perform suspension scaffolding expansion work with the extension scaffolding frame more stably supported on the existing scaffolding.

[0026] A support member for an expansion scaffolding according to one embodiment of the present invention is a support member for supporting an expansion scaffolding to be expanded relative to an existing scaffolding. The support member has an attachment part configured to be detachable to the end of some of the pipes in an expansion scaffolding frame in which a plurality of longitudinally extending pipes are connected together in the width direction, and a support part that protrudes from the end when the attachment part is attached to the end of the some of the pipes (first configuration).

[0027] According to the above-mentioned configuration, after attaching an attachment portion to the end of a part of the pipe of the expansion scaffolding frame, the expansion scaffolding frame can be supported relative to the existing scaffolding by lifting the expansion scaffolding frame outside the existing scaffolding and placing at least a part of the support portion on the existing scaffolding.

[0028] Therefore, when the extension scaffolding frame is lifted using an extension scaffolding lifting device so that the ends of the multiple pipes of the extension scaffolding frame are positioned outside the existing scaffolding, the extension scaffolding frame does not rotate around the connection position with the extension scaffolding lifting device. This eliminates the need for workers to support the pipes to which the support members are attached, thereby reducing the number of workers required to support the extension scaffolding frame. This allows the extension scaffolding frame to be connected to the existing scaffolding with a smaller number of workers.

[0029] Therefore, it is possible to provide a support member for an extension scaffolding that allows the work of expanding a suspended scaffolding to be carried out efficiently.

[0030] In the first configuration, the support member further includes a positioning portion between the mounting portion and the support portion, and the positioning portion protrudes from the mounting portion in a direction intersecting the direction in which the mounting portion extends (second configuration).

[0031] According to the above-described configuration, when the mounting portion of the support member is inserted into the end of a tube of a part of the expansion scaffolding frame, the positioning portion located between the mounting portion and the support portion comes into contact with the tip of the tube.

[0032] This allows the support member to be easily positioned relative to the end of the pipe by the positioning portion. Furthermore, since the support member can be prevented from moving further in the insertion direction when the mounting portion is inserted into the end of the pipe, the support member can be prevented from moving further in the insertion direction when placed on the existing scaffolding. Therefore, the expansion scaffolding frame can be more easily and stably supported relative to the existing scaffolding.

[0033] In the second configuration, the mounting portion has a hole portion through which a fixing member that penetrates the end of the pipe can pass when inserted into the end of a part of the pipe of the expansion scaffolding frame and positioned relative to the end by the positioning portion (third configuration).

[0034] According to the above-mentioned configuration, the mounting portion is inserted into the end of a pipe of the expansion scaffolding frame, and the mounting portion is positioned relative to the end, and the fixing member that penetrates the end of the pipe also penetrates the hole in the mounting portion, so that the support member can be fixed in a positioned state relative to the end. Therefore, the expansion scaffolding frame can be more reliably supported by the support member against the existing scaffolding.

[0035] In the first configuration, the mounting portion and the support portion have a flat plate shape with a width dimension greater than a thickness dimension. The mounting portion is configured to be insertable in the longitudinal direction into a slit-shaped opening extending in the vertical direction provided at the end of one of the pipes of the expansion scaffolding frame, with the width direction of the mounting portion coinciding with the vertical direction. The support portion is configured so that the width direction coincides with the vertical direction when the mounting portion is inserted into the opening of one of the pipes (fourth configuration).

[0036] In the above-described configuration, by inserting the mounting part into the opening provided at the end of a part of the tube of the expansion scaffolding frame, the support member can be attached to the end so that the width direction of the support part coincides with the up-down direction. Moreover, by inserting the flat mounting part into the slit-shaped opening, it is possible to prevent the support member from rotating in the circumferential direction of the tube.

[0037] Here, the flat support part has a width dimension greater than a thickness dimension, and is therefore more rigid in the width direction than in the thickness direction. Therefore, by aligning the width direction of the support part with the vertical direction, the support part is less likely to bend in the vertical direction than in the left-right direction. Therefore, according to the above-mentioned configuration, the support part can be used to support the expansion scaffolding frame more stably relative to the existing scaffolding. [Effects of the Invention]

[0038] According to an exemplary embodiment of the present invention, a suspended scaffolding expansion method includes an expansion scaffolding frame preparation process for preparing an expansion scaffolding frame on an existing scaffolding, the expansion scaffolding frame having a plurality of pipes connected to each other; a support member attachment process for attaching one end of a support member extending in one direction to some of the plurality of pipes of the expansion scaffolding frame; an expansion scaffolding frame movement process for lifting the expansion scaffolding frame using an expansion scaffolding lifting device and moving it outside the existing scaffolding; an expansion scaffolding frame support process for supporting the expansion scaffolding frame with respect to the existing scaffolding so that the other end of the support member is placed on the existing scaffolding; and an expansion scaffolding frame connection process for connecting pipes other than those supported by the support members to the existing scaffolding, and then connecting the some of the pipes from which the support members have been removed to the existing scaffolding.

[0039] According to an exemplary embodiment of the present invention, a support member that supports an expansion scaffolding against an existing scaffolding has an attachment portion that is detachably configured to be attached to the end of a portion of the pipes in an expansion scaffolding frame in which a plurality of pipes are connected to each other, and a support portion that extends in the longitudinal direction from the attachment portion so as to protrude from the end of the portion of the pipe when the attachment portion is attached to the portion of the pipe.

[0040] With this method or configuration, workers do not need to support the pipes to which the support members are attached, so even fewer workers can connect the extension scaffolding frame to the existing scaffolding. This makes it possible to efficiently extend the suspended scaffolding. [Brief explanation of the drawings]

[0041] [Figure 1] FIG. 1 is a diagram schematically showing how an extension scaffolding frame is supported on a suspended scaffolding using a support member. [Figure 2] FIG. 2 is a perspective view showing a part of the suspended scaffolding and the extension scaffolding. [Figure 3] FIG. 3 is an end view taken along line III-III in FIG. 2, showing the connection structure between the suspended scaffolding and the extension scaffolding via the connecting portion. [Figure 4] FIG. 4 is a top view schematically showing how the extension scaffolding is connected to the suspended scaffolding using a support member. [Figure 5] FIG. 5 is a side view that schematically shows how the extension scaffolding is connected to the suspended scaffolding using the support member. [Figure 6] FIG. 6 is a perspective view showing a state in which a fixing member is inserted into a support member that has been inserted into an end portion of a first expansion tube. [Figure 7] FIG. 7 is a top view of the support member. [Figure 8] FIG. 8 is a side view of the support member. [Figure 9] FIG. 9 is a flowchart showing a method for expanding a suspended scaffolding. [Figure 10] FIG. 10 is a diagram showing a schematic view of how the support member is inserted into the end of the first expansion tube after the expansion scaffold frame is assembled. [Figure 11] FIG. 11 is a diagram showing a schematic view of how the extension scaffolding frame is supported on the suspended scaffolding using the extension scaffolding lifting device and the support member. [Figure 12]Figure 12 is a schematic diagram showing how some of the multiple expansion first tubes of the expansion scaffolding frame, other than the expansion first tubes to which support members are attached, are connected to the suspended scaffolding. [Figure 13] Figure 13 is a schematic diagram showing how the support members are removed, the extension scaffolding frame is connected to the lifting scaffolding, the extension scaffolding frame is supported on the structure using the lifting members, and the extension scaffolding lifting device is removed. DETAILED DESCRIPTION OF THE INVENTION

[0042] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals and description thereof will not be repeated.

[0043] In addition, in each figure used in this specification, the arrangement of each component is shown schematically to explain the interrelationship between each component, and differs from the actual dimensional ratio, etc.

[0044] In the following description, the direction in which the scaffolding plank 95 extends will be referred to as the horizontal direction, and the thickness direction of the scaffolding plank 95 will be referred to as the up-down direction. The horizontal direction not only refers to a direction horizontal to the ground, but also includes a direction inclined to the ground to the extent that it functions as a suspended scaffolding 100. The up-down direction is the vertical direction or a direction perpendicular to the horizontal direction.

[0045] In the following description, expressions such as "fix," "connect," and "attach" include not only cases where members are directly fixed to each other, but also cases where members are fixed via other members. In other words, in the following description, expressions such as "fix" include both direct and indirect fixation of members to each other.

[0046] (Embodiment) Fig. 1 is a diagram showing a schematic view of an extension scaffolding frame 70 being supported relative to a suspended scaffolding 100 using a support member 1. As shown in Fig. 1, the support member 1 according to the embodiment is a member for supporting, relative to the suspended scaffolding 100, the extension scaffolding frame 70 that has been lifted up outside the suspended scaffolding 100 by an extension scaffolding lifting device M during the extension work of the suspended scaffolding 100.

[0047] To explain the details of the support member 1, the suspended scaffolding 100, the extension scaffolding E, and the extension scaffolding hoisting device M will be described in order with reference to Figs. 2 to 5. Fig. 2 is a perspective view showing a part of the suspended scaffolding 100 and the extension scaffolding E. Fig. 3 is an end view taken along line III-III in Fig. 2, and shows the connection structure between the suspended scaffolding 100 and the extension scaffolding E by the connecting part 93. Fig. 4 is a top view schematically showing how the extension scaffolding E is connected to the suspended scaffolding 100 using the support member 1. Fig. 5 is a side view schematically showing how the extension scaffolding E is connected to the suspended scaffolding 100 using the support member 1.

[0048] (hanging scaffolding) 2, the suspended scaffolding 100 is installed below a structure (not shown) by being suspended from the structure using a suspension member 99. The suspended scaffolding 100 is used, for example, in the construction of bridges and the like.

[0049] The suspended scaffolding 100 has a plurality of scaffolding support members 91, a plurality of connecting portions 93, a plurality of scaffolding planks 95, and a plurality of suspension members 99. The suspended scaffolding 100 corresponds to the existing scaffolding of the present invention.

[0050] The plurality of scaffolding support members 91 are configured by connecting a plurality of pipes extending horizontally in a lattice pattern. The plurality of scaffolding support members 91 include a first pipe 91a and a second pipe 91b.

[0051] The first pipe 91a extends in a first horizontal direction, which is a predetermined horizontal direction. The second pipe 91b extends in a second horizontal direction, which is a direction perpendicular to the first horizontal direction. The multiple scaffolding support members 91 are formed in a lattice pattern by connecting the first pipes 91a and the second pipes 91b by multiple connecting parts 93.

[0052] The multiple connecting portions 93 are arranged at predetermined intervals in the second horizontal direction of the second pipe 91b and are fixed to the second pipe 91b. As shown in Fig. 3, the multiple connecting portions 93 have flange shapes that protrude in the first horizontal direction and in the up-down direction from the outer peripheral surface of the second pipe 91b. The portions of the connecting portions 93 located at the ends of the suspended scaffolding 100 that protrude in the first horizontal direction connect the ends of the first pipe 91a and the end 72 of the expansion scaffolding frame 70 of the expansion scaffolding E described below.

[0053] As shown in Figure 2, the multiple scaffolding planks 95 are panels supported so as to extend horizontally by the multiple scaffolding support members 91. The multiple scaffolding planks 95 are hung across a pair of first pipes 91a. The multiple scaffolding planks 95 form the floor surface of a workplace for workers working on the suspended scaffolding 100.

[0054] The multiple hanging members 99 are linear support members and are formed of, for example, wires or chains. The upper ends of the multiple hanging members 99 are fixed to a structure (not shown). The lower ends of the multiple hanging members 99 are connected to the upwardly protruding portions of the multiple connecting portions 93. The multiple hanging members 99 suspend the multiple scaffolding support members 91 relative to the structure.

[0055] (Expansion scaffolding) As shown in Figures 4 and 5, the expansion scaffolding E is formed by fixing an expansion scaffolding board 79 onto an expansion scaffolding frame 70 in which a number of pipes are connected in a frame shape. The expansion scaffolding E is connected to a connecting part 93 located at the first horizontal end of the suspended scaffolding 100 for the purpose of expanding the suspended scaffolding 100. The expansion scaffolding E has the expansion scaffolding frame 70 and the expansion scaffolding board 79.

[0056] The expansion scaffolding frame 70 is formed by connecting a plurality of pipes in a frame shape. The expansion scaffolding frame 70 has a plurality of first expansion pipes 71, one second expansion pipe 75, and a plurality of connection parts 76.

[0057] The multiple first expansion tubes 71 are each tube members extending in a first horizontal direction and are arranged side by side in the width direction, which is a direction perpendicular to the longitudinal direction. In this embodiment, the expansion scaffolding frame 70 has, for example, three first expansion tubes 71. The expansion scaffolding frame 70 may have two first expansion tubes 71, or may have four or more. The multiple first expansion tubes 71 correspond to the multiple tubes in the present invention.

[0058] The second expansion pipe 75 is a pipe that extends in the width direction of the first expansion pipe 71. The multiple connection parts 76 have a flange shape similar to the connecting parts 93 of the suspended scaffolding 100. The multiple connection parts 76 are arranged at predetermined intervals in the direction in which the second expansion pipe 75 extends (the width direction of the first expansion pipe 71), and are fixed to the second expansion pipe 75.

[0059] The second expansion tube 75 connects the plurality of first expansion tubes 71 in the width direction by connecting one end of the first expansion tube 71 in the longitudinal direction to the connection portion 76.

[0060] The other longitudinal end portions 72 of the plurality of first expansion tubes 71 are free ends. Each of the other longitudinal end portions 72 has an opening 73 at the end in the longitudinal direction.

[0061] As will be described in more detail below, the opening 73 has a slit shape that extends in the vertical direction. The portion of the connecting part 93 fixed to the second pipe 91b of the suspended scaffolding 100 that protrudes in the first horizontal direction is a plate shape that extends in the vertical direction. The plate-shaped portion of the connecting part 93 that protrudes in the first horizontal direction is inserted into the slit-shaped opening 73.

[0062] A pair of through-holes penetrating in the second horizontal direction are formed in the end 72 of the first expansion pipe 71. A flange hole penetrating in the second horizontal direction is formed in the plate-shaped portion of the connecting part 93 protruding in the first horizontal direction. When the connecting part 93 is inserted into the opening 73, the pair of through-holes formed in the end 72 of the first expansion pipe 71 and the flange hole of the connecting part 93 overlap in the second horizontal direction. Then, a wedge-shaped fixing member is inserted into the pair of through-holes in the end 72 of the first expansion pipe 71 and the flange hole of the connecting part 93 that overlap in the second horizontal direction. This allows the suspended scaffolding 100 and the expansion scaffolding frame 70 to be connected. The opening 73 is also configured to allow the mounting part 10 of the support member 1, which will be described later, to be inserted. A detailed description of the mounting structure of the support member 1 to the opening 73 will be given later.

[0063] The extension scaffolding board 79 is a panel member similar to the scaffolding board 95, and is supported so as to extend horizontally by the extension scaffolding frame 70. The extension scaffolding board 79 is spanned across a pair of first extension pipes 71 of the extension scaffolding frame 70. The extension scaffolding board 79 functions as the floor surface of the work area of ​​the extension scaffolding E.

[0064] (Extended scaffolding lifting device) The expansion scaffolding frame 70 having the above-described configuration is lifted up outside the hanging scaffolding 100 relative to the hanging scaffolding 100 by the expansion scaffolding hoisting device M. As shown in FIG. 5 , the extension scaffolding hoisting device M is a device that supports the extension scaffolding E, which has been extended outside the hanging scaffolding 100, relative to the hanging scaffolding 100 until it is connected to a lifting member 99. The extension scaffolding hoisting device M supports the extension scaffolding frame 70 relative to the hanging scaffolding 100 together with a support member 1, which will be described later. The extension scaffolding hoisting device M has a configuration similar to that of the hanging scaffolding assembling device disclosed in Japanese Patent Application Laid-Open No. 2024-33799.

[0065] The extension scaffolding lifting device M moves the extension scaffolding frame 70 in a lifted state outside the lifting scaffolding 100. The extension scaffolding lifting device M lifts the extension scaffolding frame 70 outside the lifting scaffolding 100 in an attitude such that the longitudinal direction of the first extension tube 71 coincides with the first horizontal direction and the width direction of the first extension tube 71 coincides with the second horizontal direction.

[0066] The extension scaffolding hoisting device M is fixed to an end of the hanging scaffolding 100 in the first horizontal direction. A portion of the extension scaffolding hoisting device M protrudes beyond the hanging scaffolding 100 in the first horizontal direction. The extension scaffolding hoisting device M has a hanging member M1 that is movable in the first horizontal direction outside the hanging scaffolding 100. The hanging member M1 is attached to one end of the first extension tube 71 of the extension scaffolding frame 70 in the longitudinal direction. The extension scaffolding hoisting device M moves the hanging member M1 attached to the first extension tube 71 in the first horizontal direction, thereby moving the extension scaffolding frame 70 in the first horizontal direction so that the entire extension scaffolding frame 70 is positioned outside the hanging scaffolding 100. The extension scaffolding hoisting device M is detachable from the hanging scaffolding 100.

[0067] (support member) The support member 1 will be described with reference to Figures 1, 4, 5, 7, and 8. Figure 7 is a top view of the support member 1. Figure 8 is a side view of the support member 1. As shown in Figures 1, 4, and 5, the support member 1 is a member for supporting the extension scaffolding frame 70, which has been lifted up outside the lifting scaffolding 100 by the extension scaffolding lifting device M, relative to the lifting scaffolding 100.

[0068] As shown in Figures 7 and 8, the support member 1 has an attachment portion 10, a support portion 20, and a positioning portion 30. The attachment portion 10 and the support portion 20 each have a flat plate shape extending in the longitudinal direction. The support member 1 has a shape that extends in one direction due to the attachment portion 10 and the support portion 20. The attachment portion 10 and the support portion 20 each have a width W1 that is longer than a thickness T1. The attachment portion 10 is located on one side of the support member 1 in the longitudinal direction. The support portion 20 is located on the other side of the support member 1 in the longitudinal direction. In this embodiment, the attachment portion 10 and the support portion 20 are formed from a single flat plate member. Note that the attachment portion and the support portion may each be formed from separate members.

[0069] The positioning portion 30 is located between the mounting portion 10 and the support portion 20 in the longitudinal direction. As shown in FIG. 7, the positioning portion 30 protrudes relative to the mounting portion 10 in a direction intersecting the direction in which the mounting portion 10 extends. Specifically, the positioning portion 30 protrudes beyond the mounting portion 10 on one side and the other side in the thickness direction of the mounting portion 10. A protruding length T2 of the positioning portion 30 from the mounting portion 10 is greater than a thickness T1 of the mounting portion 10. In this embodiment, the positioning portion 30 is formed of a tubular member.

[0070] 7 and 8, the mounting portion 10 protrudes in one longitudinal direction from the positioning portion 30. The support portion 20 protrudes in the other longitudinal direction from the positioning portion 30. The longitudinal length D2 of the support portion 20 is longer than the longitudinal length D1 of the mounting portion 10.

[0071] The mounting portion 10 has a hole 15 penetrating through in the thickness direction at a position close to the positioning portion 30. The hole 15 has a size that allows a fixing member K, which will be described later, to be inserted therethrough. The fixing member K will be described later.

[0072] (Support member mounting structure) The mounting structure of the support member 1 to the expansion scaffolding frame 70 will be described with reference to Fig. 6. Fig. 6 is a perspective view showing how a fixing member K is inserted into the support member 1 inserted into the end 72 of the first expansion tube 71.

[0073] As shown in Figure 6, the mounting portion 10 is fixed by a fixing member K while being inserted into the end portion 72 of one of the multiple expansion first tubes 71 in the expansion scaffolding frame 70.

[0074] As shown in FIG. 6, the end portions 72 of the plurality of first expansion tubes 71 in the expansion scaffolding frame 70 each have an opening 73 and a pair of through-hole portions 74, 74.

[0075] The opening 73 is located at the tip 72a in the first horizontal direction of the end 72 of the first expansion tube 71. The opening 73 has a slit shape that extends in the vertical direction. The opening 73 has a shape and size that allows the plate-shaped mounting part 10 to be inserted in the first horizontal direction. Therefore, the opening 73 is configured so that the mounting part 10 of the support member 1 can be attached and detached in the first horizontal direction.

[0076] Specifically, the mounting part 10 is inserted into the opening 73 in an orientation in which the longitudinal direction is aligned with the first horizontal direction, the thickness direction is aligned with the second horizontal direction, and the width direction is aligned with the up-down direction. As a result, when the support member 1 is attached to the end part 72 of the first expansion tube 71, it does not rotate in the circumferential direction of the first expansion tube 71 relative to the end part 72 of the first expansion tube 71.

[0077] The positioning portion 30 comes into contact with the tip 72a of the first expansion tube 71 when the mounting portion 10 is inserted into the opening 73. Here, as described above, the positioning portion 30 protrudes from the mounting portion 10 on one side and the other in the thickness direction of the mounting portion 10, so the positioning portion 30 easily comes into contact with the tip 72a of the first expansion tube 71. This allows the support member 1 to be easily positioned in the axial direction with respect to the end portion 72 of the first expansion tube 71.

[0078] The support parts 20 of the support member 1 attached to the ends 72 of the first expansion tubes 71 protrude from the ends 72 of the plurality of first expansion tubes 71 in the longitudinal direction (first horizontal direction).

[0079] The pair of through-holes 74, 74 penetrate the end portion 72 in the second horizontal direction at a position close to the tip 72a of the first expansion tube 71. As described above, the mounting portion 10 of the support member 1 is provided with a hole 15 that penetrates the mounting portion 10 in the thickness direction at a position close to the positioning portion 30. Therefore, when the mounting portion 10 is inserted into the opening 73 and the positioning portion 30 is brought into contact with the tip 72a of the first expansion tube 71, the pair of through-holes 74, 74 and the hole 15 of the mounting portion 10 overlap each other in the second horizontal direction. In this state, the fixing member K is inserted in the second horizontal direction into the pair of through-holes 74, 74 and the hole 15 of the mounting portion 10.

[0080] The fixing member K is, for example, a wedge-shaped member made of metal. With the mounting portion 10 inserted into the opening 73 and the positioning portion 30 in contact with the tip 72a of the first expansion tube 71, the fixing member K can penetrate the pair of through-holes 74, 74 at the end 72 of the first expansion tube 71 and the hole 15 of the mounting portion 10 in the second horizontal direction. This allows the fixing member K to fix the mounting portion 10 to the end 72 of the first expansion tube 71. This prevents the support member 1 from slipping out of the end 72 of the first expansion tube 71 in the axial direction.

[0081] Because the fixing member K has a wedge shape, the width dimension of one longitudinal side of the fixing member K is smaller than the width dimension of the other longitudinal side. The width dimension of one longitudinal side of the fixing member K is smaller than the size of the pair of through-holes 74, 74 and the hole 15. The width dimension of the other longitudinal side of the fixing member K is larger than the size of the pair of through-holes 74, 74 and the hole 15. When the fixing member K is inserted into the pair of through-holes 74, 74 and the hole 15 from one longitudinal side, the other longitudinal side of the fixing member K comes into contact with the peripheral edge of the through-hole 74. In this way, the fixing member K can fasten the support member 1 to the end 72 of the first expansion tube 71. The fixing member K inserted into the through-holes 74, 74 and the hole 15 can be removed from the through-holes 74, 74 and the hole 15 by moving the fixing member K in the direction opposite to the insertion direction. That is, the fixing member K allows the support member 1 to be attached to and detached from the end portion 72 of the first expansion tube 71.

[0082] As will be described later, the expansion scaffolding frame 70, in which the mounting part 10 of the support member 1 is attached to the end part 72 of the first expansion pipe 71, is lifted by the expansion scaffolding lifting device M, while the support part 20 of the support member 1 is placed on the existing scaffolding 90. In this way, the expansion scaffolding frame 70 can be supported relative to the suspended scaffolding 100 by the expansion scaffolding lifting device M and the support member 1.

[0083] (How to extend a suspended scaffold) Next, a method for expanding a suspended scaffolding will be described with reference to Figures 9 to 13. Figure 9 is a diagram showing a flowchart of the method for expanding a suspended scaffolding. Figure 10 is a diagram showing a schematic diagram of inserting a support member 1 into an end 72 of a first expansion tube 71 after assembling an expansion scaffolding frame 70. Figure 11 is a diagram showing a schematic diagram of supporting the expansion scaffolding frame 70 relative to a suspended scaffolding 100 using an expansion scaffolding lifting device M and a support member 1. Figure 12 is a diagram showing a schematic diagram of connecting, to the suspended scaffolding 100, first expansion tubes 71y other than some first expansion tubes 71x to which support members 1 are attached, among the multiple first expansion tubes 71 of the expansion scaffolding frame 70. Figure 13 is a schematic diagram showing how the support member 1 is removed, the expansion scaffolding frame 70 is connected to the lifting scaffolding 100, the expansion scaffolding frame 70 is supported on the structure using the lifting member 99, and the expansion scaffolding lifting device M is removed.

[0084] 9 starts (START), in step S1, the expansion scaffolding frame 70 is assembled on the suspended scaffolding 100 by connecting multiple first expansion pipes 71 to multiple connection parts 76 fixed to the second expansion pipes 75. In this embodiment, three first expansion pipes 71 are connected to one second expansion pipe 75.

[0085] In the following step S2, the mounting portion 10 of the support member 1 is inserted into the end portion 72 of some of the multiple first expansion tubes 71 of the expansion scaffolding frame 70 assembled in step S1. In this embodiment, the support member 1 is attached to the end portion 72 of the first expansion tube 71 located at one end in the width direction of the expansion scaffolding frame 70. At this time, the mounting portion 10 is inserted into a slit-shaped opening 73 extending in the vertical direction formed in the end portion 72, with the width direction aligned with the vertical direction.

[0086] In the next step S3, the support member 1 is inserted into the end portion 72 of a part of the first expansion tube 71 until the positioning portion 30 contacts the tip 72a of the first expansion tube 71. This positions the support member 1 relative to the first expansion tube 71. At this time, the hole portion 15 of the attachment portion 10 and the pair of through-hole portions 74, 74 at the end portion 72 of the first expansion tube 71 overlap each other in the thickness direction of the attachment portion 10.

[0087] Then, in step S4, the wedge-shaped fixing member K is inserted into the hole 15 of the mounting portion 10 and the pair of through-holes 74, 74 at the end portion 72 of the first expansion tube 71. This fixes the support member 1 to the end portion 72 of the first expansion tube 71.

[0088] Next, in step S5, as shown in Fig. 11, the extension scaffolding hoisting device M is attached to the end of the hanging scaffolding 100 in the first horizontal direction. At this time, a part of the extension scaffolding hoisting device M protrudes further in one direction in the first horizontal direction than the hanging scaffolding 100. The hanging member M1 is supported so as to be movable in one direction and the other direction in the first horizontal direction relative to the extension scaffolding hoisting device M. In other words, the hanging member M1 is supported so as to be movable in one direction and the other direction in the first horizontal direction also relative to the part of the extension scaffolding hoisting device M protruding from the hanging scaffolding 100.

[0089] Next, in step S6, the orientation of the expansion scaffolding frame 70 is adjusted so that the longitudinal direction of the first expansion pipe 71 coincides with the first horizontal direction and the support member 1 is positioned on the other side of the expansion scaffolding frame 70 in the first horizontal direction. Also, the position of the hanging member M1 is moved to the vicinity of the suspended scaffolding 100 or above the suspended scaffolding 100. Then, the hanging member M1 of the expansion scaffolding lifting device M is connected to one end side of the expansion scaffolding frame 70 in the first horizontal direction. In this way, the expansion scaffolding frame 70 and the hanging member M1 are connected at the connection position P.

[0090] In the following step S7, the hanging member M1 to which the extension scaffolding frame 70 is connected is moved in the first horizontal direction so as to move away from the suspended scaffolding 100. More specifically, the hanging member M1 is moved to one side in the first horizontal direction until the entire extension scaffolding frame 70 is positioned outside the suspended scaffolding 100 and the support part 20 of the support member 1 rests on the end of the suspended scaffolding 100.

[0091] In step S8, the support part 20 of the support member 1 is placed on the suspended scaffolding 100, and the extension scaffolding frame 70, which has been lifted by the extension scaffolding lifting device M outside the suspended scaffolding 100, is supported relative to the suspended scaffolding 100. That is, in step S8, the support part 20 is placed on the suspended scaffolding 100, and the extension scaffolding frame 70 with the mounting part 10 attached is supported relative to the suspended scaffolding 100. At this time, the posture of the support part 20 is such that the width direction of the support part 20 coincides with the up-down direction. Therefore, the lower end part of the support part 20 in the width direction comes into contact with the suspended scaffolding 100.

[0092] Here, in step S8, as described above, the length of the support part 20 is longer than the length of the mounting part 10, so it is easy to place the support part 20 on the suspended scaffolding 100. Therefore, it is easy to perform the work of supporting the extension scaffolding frame 70 with respect to the suspended scaffolding 100 using the support member 1.

[0093] In the subsequent step S9, as shown in Figure 12, of the multiple expansion first tubes 71 in the expansion scaffolding frame 70, the end portions 72y of the expansion first tubes 71y other than some of the expansion first tubes 71x to which the support members 1 are attached are connected to the suspended scaffolding 100.

[0094] Of the multiple first expansion tubes 71, some of the first expansion tubes to which the support member 1 is attached are referred to as first expansion tubes 71x, and their ends are referred to as ends 72x. Of the multiple first expansion tubes, the remaining tubes other than the first expansion tubes 71x are referred to as first expansion tubes 71y, and their ends are referred to as ends 72y.

[0095] In step S10, as shown in Figures 12 and 13, the support members 1 are removed from the ends 72x of some of the first expansion tubes 71x. Then, the ends 72x of some of the first expansion tubes 71x from which the support members 1 have been removed are connected to the suspended scaffolding 100. In this manner, the expansion scaffolding frame 70 is connected to the suspended scaffolding 100.

[0096] In step S11, although not specifically shown, an extension scaffolding board 79 is fixed onto the extension scaffolding frame 70 connected to the scaffolding 100.

[0097] In the following step S12, as shown in Fig. 13, the upper end of the hanging member 99 is attached to a structure not shown. Then, the lower end of the hanging member 99 is attached to the connection part 76 fixed to the second expansion pipe 75 of the expansion scaffolding frame 70. In this way, the expansion scaffolding frame 70 with the expansion scaffolding board 79 fixed thereto is lifted up relative to a structure not shown.

[0098] In step S13, the hanging members M1 are removed from the expansion scaffolding frame 70, and the expansion scaffolding lifting device M is removed from the suspended scaffolding 100. Through the above steps, the suspended scaffolding 100 is expanded.

[0099] Note that step S1 corresponds to the expansion scaffolding frame preparation process, steps S2 to S4 correspond to the support member installation process, steps S5 to S7 correspond to the expansion scaffolding frame moving process, step S8 corresponds to the expansion scaffolding frame support process, and steps S9 to S10 correspond to the expansion scaffolding frame connection process.

[0100] The suspended scaffolding expansion method according to this embodiment described above is a suspended scaffolding expansion method for expanding an expansion scaffolding E relative to a suspended scaffolding 100. The suspended scaffolding expansion method includes a scaffolding frame preparation step of preparing an expansion scaffolding frame 70 on the suspended scaffolding 100, in which a plurality of tubes 71 extending in the longitudinal direction are connected together in the width direction; a support member attachment step of attaching mounting parts 10 of support members 1 to end parts 72 (72x) of some of the tubes 71 (71x) of the expansion scaffolding frame 70; and a step of lifting the expansion scaffolding frame 70 to which the support members 1 are attached using an expansion scaffolding lifting device M and lifting the expansion scaffolding frame 70 with the support members 1 attached. The method includes a scaffolding frame moving process for moving the scaffolding frame outside the site 100, a scaffolding frame supporting process for placing the support part 20 of the support member 1 on the suspended scaffolding 100 and supporting the expansion scaffolding frame 70 relative to the suspended scaffolding 100, and a scaffolding frame connecting process for connecting the end 72y of the pipe 71y other than some of the pipes 71x of the expansion scaffolding frame 70 supported by the support member 1 to the suspended scaffolding 100, and then connecting the end 72x of some of the pipes 71x from which the support member 1 has been removed to the suspended scaffolding 100.

[0101] According to the above-described method, the expansion scaffolding frame 70, in which a plurality of first expansion pipes 71 are connected via second expansion pipes 75, can be prepared on the suspended scaffolding 100 and then sent out to the outside of the suspended scaffolding 100. Therefore, since a plurality of first expansion pipes 71 are sent out to the outside of the suspended scaffolding 100 in a state in which they are connected via second expansion pipes 75, workability can be improved compared to when single pipes are sent out one by one and connected outside the suspended scaffolding 100.

[0102] Incidentally, when connecting the expansion scaffolding frame 70 to the suspended scaffolding 100, the expansion scaffolding frame 70 is lifted using an expansion scaffolding hoisting device M so that the end portions 72 of the multiple first expansion pipes 71 in the expansion scaffolding frame 70 are positioned outside the suspended scaffolding 100. At this time, the end portions 72 of the multiple first expansion pipes 71 that make up the expansion scaffolding frame 70 need to be supported by multiple workers so that the expansion scaffolding frame 70 does not rotate and move around the connection position P of the expansion scaffolding frame 70 with the expansion scaffolding hoisting device M.

[0103] In the above-described method, the mounting portion 10 of the support member 1 is attached to the end portion 72 of a part of the first expansion pipe 71 of the expansion scaffolding frame 70, and then the support portion 20 of the support member 1 is placed on the suspended scaffolding 100 while the expansion scaffolding frame 70 is lifted up outside the suspended scaffolding 100, thereby supporting the expansion scaffolding frame 70 relative to the suspended scaffolding 100.

[0104] Therefore, when the expansion scaffolding frame 70 is lifted using the expansion scaffolding lifting device M so that the ends 72 of the multiple first expansion tubes 71 in the expansion scaffolding frame 70 are positioned outside the suspended scaffolding 100, the expansion scaffolding frame 70 does not rotate around the connection position P with the expansion scaffolding lifting device M. Therefore, since there is no need to support the first expansion tubes 71 to which the support members 1 are attached, the number of workers supporting the expansion scaffolding frame 70 can be reduced. Therefore, the expansion scaffolding frame 70 can be connected to the suspended scaffolding 100 with a smaller number of workers.

[0105] Therefore, a suspended scaffolding expansion method can be provided that allows the work of expanding the suspended scaffolding 100 to be carried out efficiently.

[0106] In this embodiment, in the support member mounting process, the support member 1 is positioned relative to the tip 72 of the first expansion tube 71, which is part of the expansion scaffolding frame 70, by the positioning portion 30 located between the mounting portion 10 and the support portion 20 of the support member 1.

[0107] According to the above-described method, the positioning portion 30 can position the support member 1 relative to the tip 72 of a portion of the first expansion tube 71 of the expansion scaffolding frame 70, so that the support member 1 can be easily attached to the end 72 of a portion of the first expansion tube 71.

[0108] In this embodiment, in the support member installation process, the installation portion 10 of the support member 1 is inserted into the end portion 72 of a part of the first expansion tube 71 of the expansion scaffolding frame 70, and the positioning portion 30 protruding in a direction intersecting the extension direction of the support member 1 is brought into contact with the tip portion 72 of the part of the first expansion tube 71, thereby positioning the support member 1.

[0109] According to the above-described method, by inserting the mounting portion 10 of the support member 1 into the end portion 72 of the first expansion tube 71 that is part of the expansion scaffolding frame 70, the position of the support member 1 relative to the expansion scaffolding frame 70 can be determined by the positioning portion 30. This allows the support member 1 to be easily positioned and attached to the end portion 72 of the first expansion tube 71 that is part of the expansion scaffolding frame 70.

[0110] In this embodiment, in the support member installation process, the support member 1 is positioned relative to the tip 72 of a portion of the expansion first tube 71 of the expansion scaffolding frame 70 by the positioning section 30, and the position of the support member 1 relative to the end 72 of the portion of the expansion first tube 71 is fixed by the fixing member K.

[0111] As a result, the fixing member K can fix the support member 1 in a positioned state relative to the end 72 of the first expansion tube 71 that is a part of the expansion scaffolding frame 70. Therefore, the support member 1 can be prevented from slipping out of the end 72 of the first expansion tube 71. Therefore, the support member 1 can more reliably support the expansion scaffolding frame 70 relative to the suspended scaffolding 100.

[0112] In this embodiment, the support part 20 of the support member 1 has a flat plate shape with a width dimension greater than a thickness dimension. In the expansion scaffolding frame support process, one end in the width direction of the support part 20 of the support member 1 is brought into contact with the top of the suspended scaffolding 100, with the mounting part 10 of the support member 1 attached to the end part 72 of the first expansion pipe 71 that is part of the expansion scaffolding frame 70.

[0113] According to the above-described method, the support part 20 of the support member 1 can be placed on the existing scaffolding in a position in which the width direction of the support part 20 of the support member 1 coincides with the up-down direction.

[0114] Here, the support part 20 of the support member 1 has a flat plate shape with a width dimension greater than a thickness dimension, and therefore has higher rigidity in the width direction than in the thickness direction. Therefore, when the support part 20 of the support member 1 is oriented with its width direction aligned with the up-down direction, it is difficult to bend in the up-down direction.

[0115] This allows the extension scaffolding frame 70 to be supported relative to the suspended scaffolding 100 using the support parts 20 of the support member 1, which are less likely to bend in the vertical direction. Therefore, workers can perform suspended scaffolding expansion work in a state in which the extension scaffolding frame 70 is more stably supported relative to the suspended scaffolding 100.

[0116] The support member 1 of the expansion scaffolding frame 70 according to the present embodiment described above is a member that supports the expansion scaffolding frame 70 that is expanded relative to the suspended scaffolding 100. The support member 1 has an attachment portion 10 that is configured to be attachable and detachable to end portions 72 of some of the multiple first expansion tubes 71 among the multiple first expansion tubes 71 in the expansion scaffolding frame 70, in which multiple first expansion tubes 71 extending in the longitudinal direction are connected together in the width direction, and a support portion 20 that protrudes from the end portions 72 when the attachment portion 10 is attached to the end portions 72 of some of the first expansion tubes 71.

[0117] According to the above-mentioned configuration, the mounting portion 10 is attached to the end portion 72 of a part of the first expansion pipe 71 of the expansion scaffolding frame 70, and then the expansion scaffolding frame 70 is lifted up outside the suspended scaffolding 100 and at least a part of the support portion 20 is placed on the suspended scaffolding 100, thereby supporting the expansion scaffolding frame 70 relative to the suspended scaffolding 100.

[0118] Therefore, when the expansion scaffolding frame 70 is lifted using the expansion scaffolding lifting device M so that the ends 72 of the multiple first expansion tubes 71 of the expansion scaffolding frame 70 are positioned outside the suspended scaffolding 100, the expansion scaffolding frame 70 does not rotate around the connection position P with the expansion scaffolding lifting device M. This eliminates the need for workers to support the first expansion tubes 71 to which the support members 1 are attached, allowing the number of workers supporting the expansion scaffolding frame 70 to be reduced. This means that the expansion scaffolding frame 70 can be connected to the suspended scaffolding 100 with a smaller number of workers.

[0119] Therefore, it is possible to provide a support member 1 for an expansion scaffolding frame that allows the work of expanding the suspended scaffolding 100 to be carried out efficiently.

[0120] In this embodiment, the support member 1 further has a positioning portion 30 between the mounting portion 10 and the support portion 20. The positioning portion 30 protrudes from the mounting portion 10 in a direction intersecting the direction in which the mounting portion 10 extends.

[0121] According to the above-mentioned configuration, when the mounting portion 10 of the support member 1 is inserted into the end portion 72 of the first expansion tube 71 that is part of the expansion scaffolding frame 70, the positioning portion 30 located between the mounting portion 10 and the support portion 20 comes into contact with the tip 72a of the first expansion tube 71.

[0122] This allows the positioning portion 30 to easily position the support member 1 relative to the end portions 72 of some of the first expansion tubes 71. Furthermore, when the mounting portion 10 is inserted into the end portions 72 of some of the first expansion tubes 71, the support member 1 can be prevented from moving any further in the insertion direction, and therefore when the support member 1 is placed on the suspended scaffolding 100, the support member 1 can be prevented from moving in the insertion direction. Therefore, the expansion scaffolding frame 70 can be supported more easily and stably relative to the suspended scaffolding 100.

[0123] In this embodiment, the mounting portion 10 has a hole portion 15 through which a fixing member K can pass, which penetrates the end 72 of the first expansion tube 71 when it is inserted into the end 72 of a part of the expansion scaffolding frame 70 and positioned relative to the end 72 by the positioning portion 30.

[0124] According to the above-described configuration, when the mounting part 10 is inserted into the end part 72 of the first expansion tube 71 that is a part of the expansion scaffolding frame 70 and the mounting part 10 is positioned relative to the end part 72, the fixing member K that penetrates the end part 72 of the first expansion tube 71 also penetrates the hole part 15 of the mounting part 10, thereby fixing the support member 1 in a positioned state relative to the end part 72. Therefore, the support member 1 can more reliably support the expansion scaffolding frame 70 relative to the suspended scaffolding 100.

[0125] In this embodiment, the mounting portion 10 and the support portion 20 have a flat plate shape with a width dimension greater than a thickness dimension. The mounting portion 10 is configured to be insertable longitudinally into a vertically extending slit-shaped opening 73 provided at an end 72 of a first expansion tube 71 that is part of the expansion scaffolding frame 70, with the width direction of the mounting portion 10 coinciding with the vertical direction. The support portion 20 is arranged so that the width direction coincides with the vertical direction when the mounting portion 10 is inserted into the opening 73 of the first expansion tube 71.

[0126] In the above-described configuration, by inserting the mounting part 10 into the opening 73 provided at the end 72 of the first expansion tube 71, which is a part of the expansion scaffolding frame 70, the support member 1 can be attached to the end 72 so that the width direction of the support part 20 coincides with the up-down direction. Moreover, by inserting the flat mounting part 10 into the slit-shaped opening 73, the support member 1 can be prevented from rotating in the circumferential direction of the first expansion tube 71.

[0127] Here, the flat support part 20, which has a width dimension greater than a thickness dimension, has higher rigidity in the width direction than in the thickness direction. Therefore, by aligning the width direction of the support part 20 with the vertical direction, the support part 20 is less likely to bend in the vertical direction than in the left-right direction. Therefore, with the above-mentioned configuration, the support part 20 can be used to support the extension scaffolding frame 70 with respect to the suspended scaffolding 100 in a more stable state.

[0128] (Other embodiments) Although the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiments, and it is possible to appropriately modify the above-described embodiments within the scope of the spirit of the present invention.

[0129] In the above embodiment, the support member 1 has an attachment portion 10, a support portion 20, and a positioning portion 30. The support member does not necessarily have to have a positioning portion. In this case, the attachment portion and the support portion may be integrally formed.

[0130] In the above embodiment, the mounting portion 10 and the support portion 20 have a flat plate shape. However, the mounting portion and the support portion may have a shape other than a flat plate as long as they extend in one direction. The mounting portion and the support portion may be, for example, columnar.

[0131] In the above embodiment, the positioning portion 30 protrudes beyond the mounting portion 10 on one side and the other side in the thickness direction of the mounting portion 10. However, the positioning portion may protrude on one side in the thickness direction of the mounting portion.

[0132] The positioning portion may have any configuration as long as it can be positioned relative to the end of the first expansion tube. In other words, the positioning portion does not have to protrude from the attachment portion. The positioning portion may be, for example, a mark or the like marked on the flat plate member of the support member. For example, the position of the support member relative to the first expansion tube may be determined by aligning the mark with the end of the first expansion tube.

[0133] In the above embodiment, the longitudinal length of the support part 20 is configured to be longer than the longitudinal length of the mounting part 10. However, as long as the support part can support the extension scaffolding frame to which the mounting part is attached relative to the suspended scaffolding, the longitudinal length of the support part may be configured to be shorter than the longitudinal length of the mounting part.

[0134] In the above embodiment, the extension scaffolding lifting device M has the same configuration as the suspension scaffolding assembly device disclosed in Japanese Patent Application Laid-Open No. 2024-33799. However, the extension scaffolding lifting device may have any configuration as long as it can lift the extension scaffolding frame relative to the suspension scaffolding outside the suspension scaffolding.

[0135] In the above embodiment, the expansion scaffolding frame 70 is constructed by connecting multiple first expansion pipes 71 to one second expansion pipe 75. However, the expansion scaffolding frame may have any configuration as long as it is connectable to the suspended scaffolding and capable of supporting the expansion scaffolding boards. The expansion scaffolding frame may be constructed, for example, by connecting multiple first expansion pipes to multiple second expansion pipes. The expansion scaffolding frame may be a structure that includes a tubular member extending in the vertical direction in part.

[0136] In the above embodiment, the support member 1 is fixed by the fixing member K with the mounting portion 10 inserted into the end portion 72 of one of the multiple first expansion tubes 71 in the expansion scaffolding frame 70. However, the support member may be fixed to the end portion of the first expansion tube in any manner. For example, the support member may have a structure in which it is fixed by inserting the mounting portion into the end portion of the first expansion tube, such as a fitting structure. In this case, no fixing member is required to fix the support member to the end portion of the first expansion tube.

[0137] In the above embodiment, one support member 1 is attached to the end 72 of the first expansion tube 71 located at one end in the width direction of the expansion scaffolding frame 70. However, the support member may also be attached to an end of the first expansion tube located at a position other than one end in the width direction of the expansion scaffolding frame. Also, multiple support members may be attached to the ends of multiple first expansion tubes. [Industrial Applicability]

[0138] The present invention can be used in a suspended scaffolding expansion method for expanding a suspended scaffolding. [Explanation of symbols]

[0139] 1 Support member 10 Mounting part 15 Hole 20 Support part 30 Positioning part E. Expansion scaffolding 70 Expansion scaffolding frame 71, 71x, 71y Extension 1st Pipe 72,72x,72y end 72a tip 73 Opening 74 Through-hole section 75 Second extension tube 76 Connection 79 Expansion scaffolding board 100 Hanging scaffolding 91 Scaffolding support members 91a 1st pipe 91b 2nd pipe 93 Connecting part 95 Scaffolding Planks 99 Hanging members M Extended Scaffolding Lifting Device M1 Hanging material K fixing member

Claims

1. A suspended scaffolding extension method for extending a suspended scaffolding to an existing scaffolding, An expansion scaffolding frame preparation process for preparing an expansion scaffolding frame on the existing scaffolding, in which a plurality of pipes extending in the longitudinal direction are connected to each other in the width direction; a support member attachment process for attaching one end side of a support member extending in one direction to an end of a part of the plurality of pipes of the expansion scaffolding frame; An expansion scaffolding frame moving process in which the expansion scaffolding frame to which the support member is attached is lifted using an expansion scaffolding lifting device and moved outside the existing scaffolding; An expansion scaffolding frame supporting process in which the other end side of the support member is placed on the existing scaffolding to support the expansion scaffolding frame with respect to the existing scaffolding; an expansion scaffolding frame connecting process for connecting the ends of the pipes other than the part of the pipes of the expansion scaffolding frame supported by the support members to the existing scaffolding, and then connecting the ends of the part of the pipes from which the support members have been removed to the existing scaffolding; having How to extend a suspended scaffold.

2. The method for extending a suspended scaffolding according to claim 1, In the support member mounting step, the support member is positioned relative to the tip of the part of the pipe of the expansion scaffolding frame by a positioning portion located between the one end side and the other end side of the support member. How to extend a suspended scaffold.

3. The suspended scaffolding extension method according to claim 2, In the support member mounting step, one end of the support member is inserted into the end of a part of the pipe of the expansion scaffolding frame, and the positioning portion protruding in a direction intersecting the extension direction of the support member is brought into contact with the tip of the part of the pipe to position it. How to extend a suspended scaffold.

4. The suspended scaffolding extension method according to claim 2, In the support member mounting step, the support member is positioned relative to the tip of a portion of the pipe of the expansion scaffolding frame by a positioning portion, and the position of the support member relative to the end of the portion of the pipe is fixed by a fixing member. How to extend a suspended scaffold.

5. The method for extending a suspended scaffolding according to claim 1, The other end of the support member has a flat plate shape with a width dimension greater than a thickness dimension, In the expansion scaffolding frame supporting step, one end of the support member is attached to an end of a pipe of the expansion scaffolding frame, and one end of the other end of the support member in the width direction is brought into contact with the existing scaffolding. How to extend a suspended scaffold.

6. A support member for supporting an expansion scaffold to be expanded relative to an existing scaffold, An attachment portion configured to be detachable to the end portions of some of the pipes in an expansion scaffolding frame in which a plurality of pipes extending in the longitudinal direction are connected to each other in the width direction; a support portion that protrudes from the end portion when the attachment portion is attached to the end portion of the part of the pipe; having Support member.

7. 7. The support member of claim 6, a positioning portion between the mounting portion and the support portion; The positioning portion protrudes relative to the mounting portion in a direction intersecting a direction in which the mounting portion extends. Support member.

8. 8. The support member of claim 7, The mounting portion is The expansion scaffolding frame has a hole through which a fixing member can penetrate the end of the pipe when the expansion scaffolding frame is inserted into the end of the pipe of the part of the expansion scaffolding frame and positioned with respect to the end by the positioning part. Support member.

9. 7. The support member of claim 6, the mounting portion and the support portion each have a flat plate shape with a width greater than a thickness, The mounting portion is configured to be insertable in the longitudinal direction into a slit-shaped opening extending in the vertical direction provided at the end of a pipe of the expansion scaffolding frame, with the width direction of the mounting portion coinciding with the vertical direction, The support portion is provided so that a width direction thereof coincides with a vertical direction when the attachment portion is inserted into the opening of the part of the pipe. Support member.

Images