Movable roof device for scaffold and scaffold for bridge

Abstract

To provide a movable roof device for a scaffold capable of performing work on a main girder of a bridge even in bad weather.SOLUTION: A movable roof device 1 for a scaffold includes: a plurality of rail parts 10 supported by scaffold board support parts 71 that support a plurality of plate-shaped scaffold boards 73 arranged along a main girder 91 of a bridge 90 with respect to the main girder 91 to extend in an extending direction of the main girder 91 along the main girder 91; and a movable roof part 50 having a roof body part 20 covering a part of a top surface S of the main girder 91 and a part of the scaffold board 73 in plan view and a moving part 30 supporting the roof body part 20 movably in an extending direction with respect to the plurality of rail parts 10, and movable on the plurality of rail parts 10 in the extending direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a movable roof device for scaffolding and a scaffolding for bridges, which covers a part of the main girder and a part of the scaffolding board of a bridge and has a movable roof section that can move in the extension direction of the main girder. [Background technology]

[0002] In the construction of bridges such as road bridges, a configuration for covering the area when concrete is being poured is known. Specifically, for example, Patent Document 1 discloses a mobile roof system for pouring composite slab concrete that can cover the bottom steel plate when pouring the composite slab concrete.

[0003] The movable roof equipment for pouring composite slab concrete in Patent Document 1 has multiple rails made up of side steel plates and rail members fixed to inspection rods, and a movable roof in which a protective sheet is stretched over a framework made up of multiple vertical and horizontal ribs and roller members are attached to the vertical ribs. Patent Document 1 discloses that the movable roof, which has a simple configuration, covers the bottom steel plate, preventing temperature rise due to sunlight, thereby promoting sufficient initial strength of the concrete and making it possible to suppress cracking due to autogenous shrinkage after hardening. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-144854 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, bridge deck replacement work is carried out when an aging deck is replaced with a new one. In this deck replacement work, workers work on the main girders of the bridge, so bridge scaffolding is set up with scaffolding boards that extend along the extension direction of the main girders. One example of work on the main girders is the work of removing paint and concrete pieces that have adhered to the main girders of the bridge after removing the old existing deck and before installing a new deck (cleaning work). In this cleanup work, the workers need to stand on the scaffolding boards and work on the top surface of the main girders.

[0006] However, in bad weather, such as rain, the top surface of the main girder and the scaffolding planks may become wet due to rain, which may affect the work efficiency and quality of the workers. Therefore, there is a need for a device that allows the workers to continue working on the main girder on the scaffolding planks even in bad weather.

[0007] An object of the present invention is to provide a movable roof device for scaffolding that enables work on the main girders of a bridge even in bad weather. [Means for solving the problem]

[0008] A movable roof device for scaffolding according to one embodiment of the present invention comprises a plurality of rail sections supported by scaffolding board support sections that support a plurality of plate-shaped scaffolding boards arranged along the main girders of a bridge so as to extend in the extension direction of the main girders, a roof main body section that covers part of the top surface of the main girders and part of the scaffolding boards in a planar view, and a movable section that supports the roof main body section so that it can move in the extension direction relative to the plurality of rail sections, and is movable on the plurality of rail sections in the extension direction (first configuration).

[0009] According to the above-mentioned configuration, the roof body of the movable roof unit can cover a part of the top surface of the main girder and a part of the scaffolding board on which a worker stands to perform work on that part of the top surface. Moreover, the movable unit of the movable roof unit can move the roof body unit relative to the multiple rails extending in the extension direction.

[0010] This allows the movable roof section to move in the extension direction in accordance with the position of the worker moving on the scaffolding board in the extension direction. Therefore, even if it is raining when the worker is working on a portion of the top surface of the main girder, the portion of the top surface of the main girder and the worker on the scaffolding board can be prevented from getting wet by the rain. Thus, a movable roof device for scaffolding can be provided that enables work on the main girders of a bridge even in bad weather.

[0011] In the first configuration of the movable roof device for scaffolding, the roof main body portion has a roof portion located above the top surface of the main girder and the scaffolding board, and overlapping with part of the top surface of the main girder and part of the scaffolding board in a plan view, and a roof support portion whose upper portion is connected to the roof portion and whose lower portion is connected to the movable portion, supporting the roof portion (second configuration).

[0012] This allows the roof support section to support the roof section at a distance above the rail sections, thus ensuring a working space below the roof section, and improving the ease with which workers can work on the top surface of the main girder.

[0013] In the second configuration of the movable roof device for scaffolding, the roof support portion has a plurality of pillar-shaped support portions extending in the vertical direction, and a plurality of horizontal connecting portions extending horizontally and connecting the plurality of support portions to each other in the horizontal direction (third configuration).

[0014] This makes it possible to obtain a structure in which a plurality of support columns are reinforced by a plurality of horizontal connecting portions, thereby enabling the roof portion to be supported by a stronger roof support portion.

[0015] In the third configuration of the mobile roof device for scaffolding, the roof main body has roof connecting parts that connect the roof part to the plurality of support parts, and support connecting parts that connect the plurality of support parts to the plurality of horizontal connecting parts. The roof connecting parts and the support connecting parts are each configured to be disassembled (fourth configuration).

[0016] This allows the roof portion, the plurality of support columns, and the plurality of horizontal connecting portions to be disassembled separately, making it easier to remove the main roof portion.

[0017] In the second configuration of the movable roof device for scaffolding, the roof portion, in a plan view, covers the top surface of the main girder and the scaffolding board in the width direction, which is a direction perpendicular to the extension direction (fifth configuration).

[0018] This prevents the top surfaces of the main girders and the scaffolding planks from being exposed in the width direction from the roof in a plan view, so that even in rainy weather, for example, workers on the scaffolding planks and the top surfaces of the main girders can be more reliably prevented from getting wet.

[0019] In the second configuration of the mobile roof device for scaffolding, the length of the shortest support pillar among the plurality of support pillars is shorter than the horizontal distance between the farthest support pillars among the plurality of support pillars (sixth configuration).

[0020] By supporting the roof with multiple support columns as described above, the installation height of the roof can be lowered, which allows the roof to be supported more stably by the multiple rails.

[0021] In the first configuration of the movable roof device for scaffolding, the multiple rail portions have rails that extend in the extension direction and along which the movable portion moves, and a wheel derailment prevention portion that includes a pair of side wall portions that extend upward from both widthwise ends of the rail when viewed in the extension direction (seventh configuration).

[0022] In the above-described configuration, the movable section can move in the extension direction on the rail, but cannot move in the width direction due to the side walls of the track derailment prevention section. Therefore, the movable section can move in the extension direction without derailing in the width direction. This makes it easier to move the movable roof section in the extension direction.

[0023] A bridge scaffolding according to one embodiment of the present invention comprises a plurality of plate-shaped scaffolding boards arranged to extend in the extension direction of the main girder of the bridge, a scaffolding board support section that supports the plurality of scaffolding boards relative to the main girder, and a movable roof device for scaffolding described in any one of the configurations of claims 1 to 7 (eighth configuration).

[0024] This allows for the provision of a bridge scaffolding in which the movable roof device can be moved in the extension direction along the main girders and scaffolding boards of the bridge, thereby enabling work on the main girders of the bridge to be carried out even in bad weather.

[0025] In the bridge scaffolding of the eighth configuration, the plurality of scaffolding boards are arranged on one side and the other side of the width direction, which is a direction perpendicular to the extension direction of the main girder in a plan view. The roof body portion of the scaffolding mobile roof device covers the top surface of the main girder and the plurality of scaffolding boards in the width direction in a plan view (ninth configuration).

[0026] This allows workers to work on the top surface of the main girder from multiple scaffolding boards placed on one side and the other side of the main girder in the width direction. Moreover, the workers will not get wet from rain or the like on either scaffolding board. Therefore, work on the top surface of the main girder can be improved even in bad weather.

[0027] In the bridge scaffolding of the ninth configuration, the scaffolding board support portion supports the plurality of scaffolding boards on one side and the other side of the width direction relative to the main girder in a plan view. Both ends of the scaffolding board support portion in the width direction are located outward from both ends of the plurality of scaffolding boards arranged on one side and the other side of the width direction in a plan view. The plurality of rail portions of the scaffolding mobile roof device are supported on both ends of the scaffolding board support portion in the width direction (tenth configuration).

[0028] In the above-described configuration, the rail portions are supported on both widthwise ends of the scaffolding plank support portions, outward of both widthwise ends of the scaffolding planks. This ensures that workers on the scaffolding planks are protected from rain and other factors. Furthermore, because the rail portions are not located between the main girders and the scaffolding planks, work on the top surface of the main girders is not impeded. This allows for the realization of bridge scaffolding that is more reliably protected from rain and other factors while providing better workability. [Effects of the Invention]

[0029] A movable roof device for scaffolding according to one embodiment of the present invention comprises a plurality of rail sections supported by scaffolding board support sections that support a plurality of plate-shaped scaffolding boards arranged along the main girders of a bridge so as to extend in the extension direction of the main girders, a roof main body section that covers part of the top surface of the main girders and part of the scaffolding boards in a planar view, and a movable roof section that supports the roof main body section so that it can move in the extension direction relative to the plurality of rail sections, and is movable on the plurality of rail sections in the extension direction.

[0030] This allows the movable roof section covering part of the top surface of the main girder and part of the scaffolding board to move in the extension direction to match the position of the worker on the scaffolding board working on the top surface of the main girder. Therefore, even if it is raining, for example, the part of the top surface of the main girder and the worker on the scaffolding board can be prevented from getting wet by the rain. Thus, a movable roof device for scaffolding can be provided that allows work on the main girders of a bridge even in bad weather. [Brief explanation of the drawings]

[0031] [Figure 1] FIG. 1 is a perspective view showing a schematic configuration of a bridge scaffolding on which a mobile roof device for scaffolding is installed. [Figure 2] FIG. 2 is a view of a bridge scaffolding on which a mobile roof device for scaffolding is installed, viewed in the direction of extension of the main girder. [Figure 3] FIG. 3 is a perspective view showing a schematic configuration of a plurality of rail portions. [Figure 4] FIG. 4 is a view of the rail portions as viewed in the extension direction. [Figure 5] FIG. 5 is a diagram showing a schematic configuration of one side rail portion. [Figure 6] FIG. 6 is a plan view of the mobile roof device for scaffolding. [Figure 7] FIG. 7 is a view of the mobile roof device for scaffolding as seen in the extension direction. [Figure 8] FIG. 8 is a view of the mobile roof device for scaffolding as viewed in the width direction. [Figure 9] FIG. 9 is a diagram showing a connection structure between a rail main body and a moving part. DETAILED DESCRIPTION OF THE INVENTION

[0032] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals, and their description will not be repeated. Furthermore, the dimensions of the components in each drawing do not faithfully represent the actual dimensions of the components, the dimensional ratios of the components, etc.

[0033] In the following description, the direction in which the scaffolding plank 73 extends is referred to as the horizontal direction, and the thickness direction of the scaffolding plank 73 is referred to as the up-down direction. The horizontal direction includes not only a direction horizontal to the ground, but also a direction inclined to the ground to the extent that it functions as a bridge scaffolding 70. The up-down direction is the vertical direction or a direction perpendicular to the horizontal direction. Of the horizontal directions, the direction in which the main girder 91 of the bridge 90 extends is referred to as the extension direction, and the direction perpendicular to the extension direction in a plan view is referred to as the width direction.

[0034] Furthermore, in the following description, the expressions "fix," "connect," and "attach" (hereinafter referred to as "fixing") 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, the expression "fixing" includes both direct and indirect fixing of members to each other.

[0035] (Embodiment) The mobile roof device for scaffolding 1 is installed on a bridge scaffolding 70 that is temporarily set up to perform work on a main girder 91 of a bridge 90. First, the bridge 90 and the bridge scaffolding 70 will be briefly described.

[0036] (Bridges) FIG. 1 is a perspective view showing the schematic configuration of a bridge scaffolding 70 on which a mobile roof device for scaffolding 1 is installed. FIG. 2 is a view of the bridge scaffolding 70 of FIG. 1 as seen in the extension direction of a main girder 91. As shown in FIGS. 1 and 2, a bridge 90 is a road structure erected to cross obstacles such as rivers, buildings, or other traffic routes. The bridge 90 includes, for example, a road bridge. The bridge 90 has a deck slab and multiple main girders 91.

[0037] The deck is a floor material on which vehicles such as cars and motorcycles can travel. The deck is supported by a plurality of main girders 91 extending in the extension direction. The deck is made of, for example, asphalt. The deck is provided so as to be replaceable with respect to the plurality of main girders 91.

[0038] The main girders 91 extend in the extension direction between the deck slab and the installation surface. A plurality of the main girders 91 are arranged in the width direction. The main girders 91 have the shape of, for example, H-shaped steel or I-shaped steel.

[0039] As shown in Figures 1 and 2, the main girder 91 has a lower flange (not shown), a web 911, and an upper flange 912. The lower flange is located at the lower end of the main girder 91 and is a plate-like structure extending horizontally. The lower flange is placed on the installation surface via a support (not shown). The web 911 is a plate-like structure extending upward from the lower flange. The upper flange 912 is a plate-like structure extending horizontally and is connected to the upper end of the web 911. The upper flange 912 contacts the bottom surface of the deck slab and supports the deck slab.

[0040] (bridge scaffolding) For example, a bridge 90 having the above-described configuration is subjected to deck replacement work to replace a deteriorated deck with a new deck. In the deck replacement work, after the deteriorated deck is removed, a bridge scaffolding 70 is temporarily set up to perform work on the top surface S of the upper flange 912 of the main girder 91. In this embodiment, a scaffolding mobile roof device 1 is installed on the bridge scaffolding 70 so that work can be performed even in bad weather.

[0041] As shown in FIGS. 1 and 2, the bridge scaffolding 70 has a scaffolding board support portion 71, a plurality of scaffolding boards 73, and a main girder inter-scaffolding 79.

[0042] The scaffolding board support portion 71 is constructed by connecting a plurality of pipe materials so as to support a plurality of scaffolding boards 73 extending along the main girder 91 relative to the main girder 91.

[0043] 2, the scaffolding board support portion 71 includes a one-side scaffolding board support portion 71a and an other-side scaffolding board support portion 71b. When viewed in the extension direction of the main girder 91, the one-side scaffolding board support portion 71a is located on one side of the width direction of the main girder 91. When viewed in the extension direction of the main girder 91, the other-side scaffolding board support portion 71b is located on the other side of the width direction of the main girder 91.

[0044] The one-side scaffolding board support portion 71a and the other-side scaffolding board support portion 71b have a configuration that is line-symmetrical in the width direction with the main girder 91 as the center. For this reason, the following mainly describes only the one-side scaffolding board support portion 71a.

[0045] The one-side scaffolding board support portion 71a has a plurality of scaffolding board support members 711a and an extension direction connecting member 715a.

[0046] The multiple scaffolding board support members 711a are fixed to the main girder 91 while being arranged at predetermined intervals in the extension direction of the main girder 91. The scaffolding board support member 711a has a support body portion 712a and a board support portion 713a.

[0047] The support body 712a is a pipe member that extends in the vertical direction along the web 911 of the main girder 91. The support body 712a is attached between the upper flange 912 and the lower flange.

[0048] The plate support portion 713a is tubular and extends horizontally, and is connected to the upper portion of the support body portion 712a. When viewed in the extension direction, the plate support portion 713a protrudes outward in the width direction relative to the support body portion 712a, which is the opposite direction from the direction in which the web 911 of the main girder 91 is positioned relative to the support body portion 712a. The multiple scaffolding plates 73 are supported by the multiple plate support portions 713a aligned in the extension direction.

[0049] The extension direction connecting member 715a is a pipe material that connects, in the extension direction, the upper parts of multiple scaffolding board support members 711a that are lined up in the extension direction of the main girder 91. The multiple scaffolding board support members 711a that are connected together in the extension direction by the extension direction connecting member 715a can support the multiple scaffolding boards 73 more stably.

[0050] As described above, the one-side scaffolding board support portion 71a and the other-side scaffolding board support portion 71b are configured to be line-symmetrical in the width direction with the main girder 91 at the center. That is, the other-side scaffolding board support portion 71b has multiple scaffolding board support members 711b and extension direction connecting members 715b. The scaffolding board support member 711b has a support main body portion 712b and a board support portion 713b.

[0051] The multiple scaffolding boards 73 are supported by the scaffolding board support parts 71 so as to extend in the extension direction along the main girder 91. The multiple scaffolding boards 73 include a one-side scaffolding board 73a and an other-side scaffolding board 73b. The one-side scaffolding board 73a is located on one side of the width direction relative to the main girder 91 when viewed in the extension direction of the main girder 91. The other-side scaffolding board 73b is located on the other side of the width direction relative to the main girder 91 when viewed in the extension direction of the main girder 91. The scaffolding boards 73a and 73b are, for example, metal plates. Since known scaffolding board panels can be used for the scaffolding boards 73a and 73b, detailed description thereof will be omitted.

[0052] The inter-girder scaffolding 79 is a temporary scaffolding located below the multiple scaffolding boards 73 and extending in both the extension and width directions. The inter-girder scaffolding 79 is connected to the other-side scaffolding board support portion 71b, which is fixed to one of the main girders 91 adjacent in the width direction, and the one-side scaffolding board support portion 71a, which is fixed to the other main girder 91. This connects the scaffolding board support portions 71 in the width direction by the inter-girder scaffolding 79. Therefore, the scaffolding board support portions 71 can more stably support the multiple scaffolding boards 73. The inter-girder scaffolding 79 also has multiple scaffolding boards 791. Therefore, workers can work not only on the multiple scaffolding boards 73 but also on the scaffolding boards 791 of the inter-girder scaffolding 79.

[0053] (Scaffolding mobile roof device) Next, the movable roof device for scaffolding 1 will be described with reference to Figures 1 to 9. The movable roof device for scaffolding 1 is a device that moves in the extension direction along the main girder 91 while covering part of the top surface S of the upper flange 912 of the main girder 91 and part of the scaffolding board 73. The movable roof device for scaffolding 1 has a plurality of rail units 10 and a movable roof unit 50.

[0054] Fig. 3 is a diagram showing a schematic configuration of the multiple rail sections 10. Fig. 4 is a diagram showing the multiple rail sections 10 viewed in the extension direction. Fig. 5 is a diagram showing a schematic configuration of one side rail section 10a. The multiple rail sections 10 support a movable roof section 50, which will be described later, so that it can move in the extension direction. As shown in Figs. 3 and 4, the multiple rail sections 10 are supported by scaffolding board support sections 71 so as to extend in the extension direction along the main girder 91 and the multiple scaffolding boards 73.

[0055] The multiple rail portions 10 include one-side rail portions 10a and other-side rail portions 10b. The one-side rail portion 10a is connected to a one-side scaffolding board support portion 71a fixed to one widthwise side 91a of the main girder 91. The other-side rail portion 10b is connected to an other-side scaffolding board support portion 71b fixed to the other widthwise side 91b of the main girder 91. In other words, the multiple rail portions 10 are located on one side and the other side of the main girder 91 in the width direction.

[0056] The one-side rail portion 10a and the other-side rail portion 10b have a configuration that is line-symmetrical in the width direction with the main girder 91 as the center. Therefore, the following mainly describes only the one-side rail portion 10a.

[0057] As shown in FIGS. 3, 4, and 5, the one-side rail portion 10a has a plurality of rail support portions 11a and a rail main body portion 19a.

[0058] The rail main body 19a is disposed on one side of the width direction relative to the main girder 91, and extends in the extension direction along the bridge 90 and scaffolding boards 73. As shown in FIG. 5, the rail main body 19a has a U-shaped cross section with an opening at the top when viewed in the extension direction. The rail main body 19a supports the moving section 30 (described below) connected to the lower part of the movable roof section 50 so that it can move in the extension direction. A detailed description of the connection structure between the rail main body 19 and the moving section 30 will be given later.

[0059] The rail support portions 11a support the rail main body portion 19a relative to the one-side scaffolding board support portion 71a. Therefore, the rail support portions 11a are aligned in the extension direction on one side of the width direction relative to the main girder 91.

[0060] The rail support portion 11a has a support portion main body 111a and a rail attachment portion 112a.

[0061] 4 and 5, the support body 111a is a pipe member extending in the vertical direction between the one-side scaffolding board support part 71a and the rail mounting part 112a. More specifically, the lower end side of the support body 111a, which is located on one side of the main girder 91 in the width direction, is connected to one end of the board support part 713a of the scaffolding board support part 71a.

[0062] The rail body 19a is attached to the rail attachment portion 112a. The rail attachment portion 112a includes a base portion 121a, a pair of attachment members 122a, and a fixing member 123a.

[0063] The base portion 121a is a plate member connected to the upper end side of the support portion main body 111a of the rail support portion 11a. The rail main body portion 19a is placed on the base portion 121a.

[0064] The pair of mounting members 122a are members located outward in the width direction relative to the rail main body 19a installed on the base portion 121a when viewed in the extension direction. That is, the pair of mounting members 122a are located on one side and the other side in the width direction relative to the rail support portion 11a. Both widthwise ends of the pair of mounting members 122a are fixed to the base portion 121a by fixing members 123a. This positions the pair of mounting members 122a so that the rail main body 19a does not move in the width direction on the base portion 121a. In this embodiment, the fixing members 123a are bolts and nuts. However, the fixing members 123a may have other configurations as long as they can fix the base portion 121a and the pair of mounting members 122a.

[0065] As described above, the one-side rail portion 10a and the other-side rail portion 10b are configured to be line-symmetrical in the width direction with the main girder 91 at the center. That is, the other-side rail portion 10b has multiple rail support portions 11b and a rail main body portion 19b. The rail support portion 11b has a support portion main body 111b and a rail mounting portion 112b. The rail mounting portion 112b has, in the width direction with the main girder 91 at the center, a base portion configured line-symmetrical with the base portion 121a, a pair of mounting members configured line-symmetrical with the pair of mounting members 122a, and a fixing member configured line-symmetrical with the fixing member 123a.

[0066] Figure 6 is a plan view of the mobile roof device for scaffolding 1. Figure 7 is a view of the mobile roof device for scaffolding 1 viewed in the extension direction. Figure 8 is a view of the mobile roof device for scaffolding 1 viewed in the width direction. As shown in Figures 6, 7 and 8, the mobile roof unit 50 moves in the extension direction along the bridge 90 and scaffolding boards 73 by moving on multiple rail units 10. The mobile roof unit 50 has a roof main body unit 20 and a moving unit 30.

[0067] The roof main body portion 20 is a roof unit that covers a portion of the top surface S of the upper flange 912 of the main girder 91 and a portion of the multiple scaffolding boards 73. The roof main body portion 20 has a roof portion 21, a roof support portion 25, a roof connection portion 27, a support connection portion 28, and a lower connection portion 29.

[0068] The roof section 21 is located on top of the roof main body section 20 and is supported by the roof support section 25. The roof section 21 has roof panels 211 and a roof frame 212. As shown in FIG. 6, the roof panels 211 are flat plate materials having a width dimension that covers the main girders 91 and multiple scaffolding panels 73 in the width direction in a plan view. The roof panels 211 cover the roof frame 212. The roof panels 211 are, for example, corrugated sheets, galvanized iron sheets, panels, etc. As shown in FIGS. 7 and 8, the roof frame 212 has multiple pipe materials assembled in a frame shape. The roof frame 212 supports the roof panels 211.

[0069] 6, roof portion 21 covers a portion of main girder 91 and a portion of the multiple scaffolding boards 73a, 73b in a plan view. Specifically, roof portion 21 is located above top surface S of main girder 91 and scaffolding boards 73a, 73b, and covers a portion of main girder 91 in the extension direction and a portion of the multiple scaffolding boards 73a, 73b in the extension direction in a plan view. By moving roof portion 21 in the extension direction, roof portion 21 can be moved in the extension direction relative to main girder 91 and the multiple scaffolding boards 73a, 73b.

[0070] In a plan view, the roof portion 21 covers the main girder 91 and the multiple scaffolding boards 73a, 73b in the width direction. Specifically, as shown in Fig. 6, the width direction length W1 of the roof portion 21 is longer than the distance W2 between one width direction end of the one side scaffolding board 73a and the other width direction end of the other side scaffolding board 73b. In other words, the width direction length W1 of the roof portion 21 is longer than the distance W2 between both width direction ends of the multiple scaffolding boards 73.

[0071] Roof support section 25 supports roof section 21 relative to multiple rail sections 10 via moving section 30, which will be described later. Specifically, the upper part of roof support section 25 is connected to roof section 21, and the lower part of roof support section 25 is connected to moving section 30. Roof support section 25 has multiple support sections 251 and horizontal connecting sections 252.

[0072] The multiple support columns 251 are pipe members extending in the vertical direction, and are located on one side and the other side of the width direction of the main girder 91 when viewed in the extension direction of the main girder 91, and are lined up at predetermined intervals in the extension direction. The multiple support columns 251 support the roof section 21. Roof connection sections 27 are provided at the upper ends of the multiple support columns 251. Lower connection sections 29 are provided at the lower ends of the multiple support columns 251.

[0073] The horizontal connecting portions 252 are pipe members extending horizontally, and connect the plurality of support portions 251 together in the horizontal direction. The horizontal connecting portions 252 include extension direction members 253 extending in the extension direction and width direction members 254 extending in the width direction. As shown in FIG. 8, the extension direction members 253 connect the plurality of support portions 251 adjacent to each other in the extension direction in the extension direction. As shown in FIG. 7, the width direction members 254 connect the plurality of support portions 251 adjacent to each other in the width direction in the width direction.

[0074] As shown in Figure 7, the length L1 of the multiple support columns 251a located on one side in the width direction is shorter than the length L2 of the multiple support columns 251b located on the other side in the width direction. As a result, the roof section 21 supported by the multiple support columns 251 is inclined in the width direction as described above. By inclining the roof section 21 in the width direction in this way, it is possible to prevent rainwater from accumulating on the top surface of the roof shingles 211. This makes it possible to prevent corrosion of the roof shingles 211 due to rainwater.

[0075] 8, the length L1 of a support column 251 that is shorter in the vertical direction than the other support columns 251 is shorter than the distance D1 between the support columns 251 located at both ends in the extension direction. Specifically, in the example shown in FIG. 8, the length L1 of a support column 251 that is shorter in the vertical direction than the other support columns 251 is shorter than the distance D1 between the support column 2511 located at one end in the extension direction and the support column 2512 located at the other end in the extension direction. This allows the installation height of the roof section 21 on the roof main body section 20 to be designed low.

[0076] As shown in Fig. 7, roof connection parts 27 connect roof section 21 and roof support part 25. Specifically, roof connection parts 27 connect roof frame 212 and the upper ends of multiple support parts 251. Roof connection parts 27 are, for example, clamps provided on the upper ends of multiple support parts 251. Roof connection parts 27 connect roof section 21 and roof support part 25 so that they can be assembled or disassembled.

[0077] The support pillar connecting portions 28 connect the plurality of support pillars 251 and the horizontal connecting portions 252. The support pillar connecting portions 28 include, for example, attached portions provided midway along the length of the plurality of support pillars 251, and attaching portions provided at both ends of the horizontal connecting portions 252. The attached portions and the attaching portions may be structured, for example, using a known wedge-type connecting structure. The support pillar connecting portions 28 connect the plurality of support pillars 251 and the horizontal connecting portions 252 so that they can be assembled or disassembled.

[0078] The lower connection parts 29 connect the roof support part 25 and the moving part 30. Specifically, the lower connection parts 29 connect the lower ends of the plurality of support parts 251 and the width direction support members 31. The lower connection parts 29 are, for example, clamps provided at the lower ends of the plurality of support parts 251. The roof support part 25 and the moving part 30 are connected by the lower connection parts 29 so that they can be assembled or disassembled.

[0079] As described above, the roof connection portion 27, the support connection portion 28, or the lower connection portion 29 makes it easier to assemble and remove the roof main body portion 20.

[0080] 9 is a diagram showing the connection structure between the rail main body portion 19 and the moving portion 30. As shown in FIGS. 7, 8, and 9, the moving portion 30 is connected to the lower ends of multiple support portions 251, and supports the roof main body portion 20 so that it can move in the extension direction relative to the multiple rail portions 10. The moving portion 30 has width-direction support members 31, roller support portions 33, and rollers 35.

[0081] The width-direction support member 31 is a pipe member extending in the width direction between the lower end of a support column 251a located on one side in the width direction and the lower end of a support column 251b located on the other side in the width direction. The width-direction support member 31 is connected to the lower ends of the multiple support columns 251 via lower connection portions 29. Therefore, the width-direction support member 31 is aligned in the extension direction at the same positions as the lower ends of the multiple support columns 251 aligned in the extension direction. Roller support portions 33 are connected to one end of the width-direction support member 31 and the other end of the width direction.

[0082] The roller support portion 33 is a member for connecting the rollers 35 to the width-direction support member 31. The upper end of the roller support portion 33 has a known clamp shape and is detachably connected to the width-direction support member 31. A pair of rollers 35 is rotatably connected to the lower end of the roller support portion 33. The pair of rollers 35 has a known configuration. Therefore, a description of the pair of rollers 35 will be omitted.

[0083] (Connection structure between moving part and rail body) As shown in Figure 9, the moving section 30 is arranged to be movable in the extension direction relative to the rail main body sections 19 of the multiple rail sections 10. As described above, the rail main body sections 19 have a U-shaped cross section with an opening at the top when viewed in the extension direction. The rail main body sections 19 have a rail 191 and a wheel derailment prevention section 192.

[0084] The rail 191 is the bottom of the rail main body 19 and extends in the extension direction. The rollers 35 of the moving part 30 move on the rail 191 in the extension direction.

[0085] The wheel derailment prevention portion 192 prevents the rollers 35 located on the rail 191 from derailing to the side or upward. The wheel derailment prevention portion 192 has a pair of side wall portions 194, 195 and a pair of upper wall portions 197, 198.

[0086] The pair of side walls 194, 195 are plate-shaped and extend upward from both ends of the rail 191 in the width direction when viewed in the extension direction of the rail main body 19, and also extend in the extension direction on the rail 191. The pair of side walls 194, 195 prevent the roller 35 from coming off in the width direction while moving on the rail 191.

[0087] When viewed in the extension direction of the rail main body 19, the pair of upper wall portions 197, 198 extend in directions approaching each other from the upper ends of the pair of side wall portions 194, 195. The pair of upper wall portions 197, 198 are plate-shaped and also extend in the extension direction. The pair of upper wall portions 197, 198 are positioned so as to cover both widthwise end sides of the roller 35 in a plan view. The pair of upper wall portions 197, 198 restrict upward movement of the roller 35 relative to the rail 191.

[0088] According to the configuration of this embodiment, the roof main body portion 20 of the movable roof portion 50 can cover a part of the top surface S of the main girder 91 and a part of the scaffolding board 73 on which the worker stands. Moreover, the moving portion 30 can move the roof main body portion 20 relative to the multiple rail portions 10.

[0089] This allows the movable roof section 50 to be moved in the extension direction in accordance with the position of a worker moving in the extension direction on the scaffolding plank 73. Therefore, even if it is raining when a worker is working on a portion of the top surface S of the main girder 91, the portion of the top surface S of the main girder 91 and the worker on the scaffolding plank 73 can be prevented from getting wet by the rain. Therefore, it is possible to provide a movable roof device for scaffolding 1 that allows work on the main girder 91 of the bridge 90 even in bad weather.

[0090] Furthermore, according to the configuration of this embodiment, the roof main body portion 20 has a roof portion 21 that is located above the top surface S of the main girder 91 and the scaffolding board 73 and overlaps with a portion of the top surface S of the main girder 91 and a portion of the scaffolding board 73 in a planar view, and a roof support portion 25 that is connected at the top to the roof portion 21 and has a moving portion 30 connected at the bottom, thereby supporting the roof portion 21.

[0091] As a result, the roof support portion 25 can support the roof portion 21 at a distance above the plurality of rail portions 10. Therefore, a working space can be secured below the roof portion 21. This improves the workability of workers on the top surface S of the main girder 91.

[0092] Furthermore, according to the configuration of this embodiment, the roof support portion 25 has a plurality of pillar-shaped support portions 251 extending in the vertical direction, and a plurality of horizontal connecting portions 252 extending horizontally and connecting the plurality of support portions 251 together horizontally.

[0093] This makes it possible to obtain a structure in which the plurality of support pillars 251 are reinforced by the plurality of horizontal connecting portions 252. Therefore, the roof portion 21 can be supported by the stronger roof support portion 25.

[0094] Furthermore, according to the configuration of this embodiment, the roof main body portion 20 has roof connection portions 27 that connect the roof portion 21 and the plurality of support portions 251, and support column connection portions 28 that connect the plurality of support columns 251 and the plurality of horizontal coupling portions 252. The roof connection portions 27 and the support column connection portions 28 are each configured to be disassembled.

[0095] This allows the roof portion 21, the plurality of support pillars 251, and the plurality of horizontal connecting portions 252 to be disassembled separately. This makes it easier to remove the roof main body portion 20.

[0096] Furthermore, according to the configuration of this embodiment, the roof portion 21 covers the top surface S of the main girder 91 and the scaffolding board 73 in the width direction in a plan view.

[0097] As a result, the top surface S of the main girder 91 and the scaffolding board 73 are not exposed in the width direction from the roof portion 21 in a plan view. Therefore, even in rainy weather, for example, it is possible to more reliably prevent workers on the scaffolding board 73 and the top surface S of the main girder 91 from getting wet by rain.

[0098] Furthermore, according to the configuration of this embodiment, the length L1 of the shortest support column among the plurality of support columns 251 is shorter than the distance D1 between the support columns among the plurality of support columns 251 that are furthest apart in the extension direction.

[0099] This allows the installation height of the roof portion 21 to be lowered, and therefore the roof portion 21 can be supported by the plurality of rail portions 10 in a more stable manner.

[0100] Furthermore, according to the configuration of this embodiment, the multiple rail sections 10 have a rail 191 that extends in the extension direction and along which the moving section 30 moves, and a wheel-off prevention section 192 that includes a pair of side wall sections 194, 195 that extend upward from both ends of the width of the rail 191 when viewed in the extension direction.

[0101] As a result, the movable section 30 can move in the extension direction on the rails 191, but cannot move in the width direction due to the side walls 194, 195 of the wheel-off prevention section 192. Therefore, the movable section 30 can move in the extension direction without coming off the rails in the width direction. This makes it easier to move the movable roof section 50 in the extension direction.

[0102] Furthermore, the configuration of this embodiment can provide a bridge scaffolding 70 equipped with a mobile roof device for scaffolding 1 that can move in the extension direction along the main girder 91 of the bridge 90 and the scaffolding plank 73. This allows work to be performed on the main girder 91 of the bridge 90 even in bad weather.

[0103] Furthermore, according to the configuration of this embodiment, the multiple scaffolding boards 73 are arranged on one side and the other side in the width direction relative to the main girder 91 in a plan view. The roof main body portion 20 covers the top surface S of the main girder 91 and the multiple scaffolding boards 73 in the width direction in a plan view.

[0104] This allows workers to work on the top surface S of the main girder 91 on multiple scaffolding boards 73 arranged on one side and the other side of the width direction of the main girder 91. Moreover, workers will not get wet from rain or the like on either scaffolding board 73. Therefore, workability on the top surface S of the main girder 91 can be improved even in bad weather.

[0105] Furthermore, according to this embodiment, the scaffolding board support portion 71 supports the plurality of scaffolding boards 73 on one side and the other side in the width direction relative to the main girder 91 in a plan view. In a plan view, both ends in the width direction of the scaffolding board support portion 71 are located outward from both ends in the width direction of the plurality of scaffolding boards 73 arranged on one side and the other side in the width direction. The plurality of rail portions 10 are supported on both ends in the width direction of the scaffolding board support portion 71.

[0106] The multiple rail sections 10 are supported on both widthwise ends of the multiple scaffolding plank support sections 71, outboard of both widthwise ends of the multiple scaffolding planks 73. This makes it possible to obtain a configuration that more reliably prevents workers on the multiple scaffolding planks 73 from getting wet from rain and the like. Moreover, because the multiple rail sections 10 are not located between the main girder 91 and the scaffolding planks 73, work on the top surface S of the main girder 91 is not hindered. Therefore, it is possible to realize a bridge scaffolding 70 that is more reliably protected from rain and the like, while also providing better workability.

[0107] (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.

[0108] In the embodiment, the bridge scaffolding 70 has an inter-girder scaffolding 79. However, the bridge scaffolding does not have to have an inter-girder scaffolding.

[0109] In the above embodiment, the scaffolding board support portion 71 and the scaffolding board 73 are located on one side and the other side in the width direction relative to the main girder 91. However, the scaffolding board support portion and the scaffolding board may be located on only one side in the width direction relative to the main girder.

[0110] In the above embodiment, the multiple rail portions 10 are located on one side and the other side in the width direction relative to the main girder 91. However, the multiple rail portions may be located on only one side in the width direction relative to the main girder.

[0111] In the above embodiment, the roof portion 21 covers, in the width direction, the top surface S of one of the multiple main girders 91 lined up in the width direction and the scaffolding boards 73 located on one side and the other side of the one main girder 91 in the width direction. However, the roof portion may also cover, in the width direction, the top surfaces of other main girders of the multiple main girders lined up in the width direction. The roof portion may also cover, in the width direction, the scaffolding boards located on one side and the other side of the other main girder. The roof portion may also cover, in the width direction, the multiple main girders lined up in the width direction and the multiple scaffolding boards lined up in the width direction.

[0112] In the above embodiment, the multiple rail portions 10 extend in the extension direction along the main girder 91 and the scaffolding plank 73. However, the multiple rail portions may extend along the main girder or the scaffolding plank. The multiple rail portions may extend along the main girder but not along the scaffolding plank. The multiple rail portions may extend along the scaffolding plank but not along the main girder.

[0113] In the above embodiment, the moving section 30 has width-direction support members 31. However, the moving section does not have to have width-direction support members. The rollers may be directly connected to the lower ends of the multiple support columns.

[0114] In the above embodiment, the roof main body 20 does not have panels or the like on the side surfaces in the width direction and extension direction of the roof support 25. However, the roof main body may have panels or the like on the side surfaces in the width direction or extension direction of the roof support. The panels or the like may be connected to, for example, multiple support columns or horizontal connecting parts in the roof support via known connecting members such as clamps. By providing the panels or the like, it is possible to prevent the top surface of the main girders and workers on the scaffolding boards from being exposed to the rain, even in rainy weather accompanied by crosswinds.

[0115] In the above embodiment, the scaffolding movable roof device 1 is installed on one of the main girders 91 arranged in the width direction. However, multiple scaffolding movable roof devices may be installed on multiple main girders. This allows work to be performed on multiple main girders simultaneously. Moreover, since the multiple installed scaffolding movable roof devices can move independently of each other in the extension direction, work can be performed according to the working pace of each worker. This further improves work efficiency.

[0116] The support body may have an extension / contraction mechanism that allows it to extend and contract in the vertical direction. For example, the support body may employ a known extension / contraction mechanism such as a hydraulic cylinder mechanism. This allows the vertical length of the rail support body to be adjusted. Therefore, the height of the rail body supported by the rail support body can be adjusted.

[0117] The rail sections may each have a movement prevention device that prevents the movable section from moving in the extension direction, thereby preventing the movable roof section from moving unintentionally due to, for example, wind.

[0118] In the above embodiment, the roof connection portions 27 are, for example, clamps or the like provided on the upper ends of the plurality of support portions 251. However, the roof connection portions may have any configuration as long as they are capable of assembling or disassembling the roof portion and the roof support portion.

[0119] In the above embodiment, the column connection portion 28 includes, for example, attached portions provided on the plurality of column portions 251 and attachment portions provided on both ends of the horizontal coupling portion 252. However, the column connection portion may have any configuration as long as it is capable of assembling or disassembling the plurality of column portions and the horizontal coupling portion. For example, it may be a clamp provided on both ends of the horizontal coupling portion.

[0120] In the above embodiment, the lower connection portions 29 are, for example, clamps or the like provided at the lower ends of the plurality of support portions 251. However, the lower connection portions may have any configuration as long as they are capable of assembling or disassembling the roof support portion and the moving portion.

[0121] In the above embodiment, the movable roof device for scaffolding 1 has two support columns 251a, 251b of different lengths in the width direction. However, the movable roof device for scaffolding may have three or more support columns of different lengths in the width direction. In this case, the length of the shortest support column may be shorter than the distance between the support column located at one end in the extension direction and the support column located at the other end in the extension direction.

[0122] In the above embodiment, the length L1 of the shortest support column 251 is shorter than the distance D1 between the support columns 251 that are furthest apart in the extension direction. However, the length of the shortest support column may also be shorter than the distance between the support columns 251 that are furthest apart in the horizontal direction. For example, the length of the shortest support column may be shorter than the widthwise distance between the support columns located at both ends of the roof support column in the width direction. The length of the shortest support column may also be shorter than the horizontal distance between the support column located at one end of the roof support column in the extension direction and on one side of the width direction, and the support column located at the other end of the roof support column in the extension direction and on the other side of the width direction. This allows the installation height of the roof section to be lowered. Therefore, the roof section can be supported more stably by the multiple rail sections. [Industrial Applicability]

[0123] The present invention can be used in bridge scaffolding. [Explanation of symbols]

[0124] 1. Mobile roof device for scaffolding 10 Rail section 10a One side rail portion, 10b Other side rail portion 11a Rail support part (one side), 11b Rail support part (other side) 111a Support body (one side), 111b Support body (other side) 112a rail mounting portion (one side), 112b rail mounting portion (other side) 121a Base (one side) 122a Pair of mounting members (one side) 123a Fixing member (one side) 19 Rail body 19a Rail body (one side), 19b Rail body (other side) 191 Rail 192 Wheel derailment prevention unit 194, 195 Pair of side walls 197,198 Pair of upper walls 20 Roof body 21 Roof 211 Roof shingles 212 Roof frame 25 Roof support 251 Post section 251a strut part (one side), 251b strut part (other side), 2511 Support section (one end in the stretching direction), 2512 Support section (other end in the extension direction) 252 Horizontal connection 253 Extension direction member 254 Width direction member 27 Roof connection 28 Pillar connection 29 Lower connection 30 Moving Part 31 Width direction support member 33 Roller support part 35 Laura 50 Moving roof section 70 Bridge scaffolding 71 Scaffolding board support part 71a one side scaffolding board support part, 71b other side scaffolding board support part 711a scaffolding board support member (one side), 711b scaffolding board support member (other side) 712a Support body (one side), 712b Support body (other side) 713a Plate support part (one side), 713b Plate support part (other side) 715a Extension direction connecting member (one side), 715b Extension direction connecting member (other side) 73 Scaffolding board 73a One side scaffolding board, 73b Other side scaffolding board 79 Main girder scaffolding 791 Scaffolding board (between main girders) 90 Bridges 91 Main girder 91a One side (main girder), 91b Other side (main girder) 911 Web 912 Upper flange S Top surface (upper flange) W1 Width of roof W2 Distance between both ends of the scaffolding board in the width direction L1 Length of support part (one side) L2 Length of the support part (other side) D1 Distance between support posts

Claims

1. A plurality of rail portions supported by scaffolding board support portions that support a plurality of plate-shaped scaffolding boards arranged along the main girder so as to extend in the extension direction of the main girder along the main girder of the bridge, relative to the main girder; A movable roof section that has a roof main body section that covers a part of the top surface of the main girder and a part of the scaffolding board in a plan view, and a movable section that supports the roof main body section so that it can move in the extension direction relative to the plurality of rail sections, and is movable on the plurality of rail sections in the extension direction; having Mobile roof device for scaffolding.

2. The moving roof device for scaffolding according to claim 1, The roof main body portion is A roof portion located above the top surface of the main girder and the scaffolding board and overlapping a part of the top surface of the main girder and a part of the scaffolding board in a plan view; a roof support part having an upper part connected to the roof part and a lower part connected to the moving part, and supporting the roof part; having Mobile roof device for scaffolding.

3. The moving roof device for scaffolding according to claim 2, The roof support portion is a plurality of pillar-shaped support parts extending in the vertical direction; a plurality of horizontal connecting portions extending in a horizontal direction and connecting the plurality of support portions to each other in the horizontal direction; having Mobile roof device for scaffolding.

4. The moving roof device for scaffolding according to claim 3, The roof main body portion is a roof connection portion that connects the roof portion and the plurality of support portions; a column connection portion that connects the plurality of column portions and the plurality of horizontal connecting portions; The roof connection portion and the pillar connection portion are each configured to be disassembled. Mobile roof device for scaffolding.

5. The moving roof device for scaffolding according to claim 2, The roof portion is In plan view, the top surface of the main girder and the scaffolding board are covered in the width direction, which is a direction perpendicular to the extension direction. Mobile roof device for scaffolding.

6. The moving roof device for scaffolding according to claim 2, The length of the shortest support column among the plurality of support columns is shorter than the horizontal distance between the farthest support columns among the plurality of support columns, Mobile roof device for scaffolding.

7. 2. The moving roof device for scaffolding according to claim 1, The plurality of rail portions include: a rail extending in the extension direction and along which the moving portion moves; a pair of side wall portions extending upward from both ends of the rail in the width direction as viewed in the extension direction; and having Mobile roof device for scaffolding.

8. A plurality of plate-shaped scaffolding plates arranged along the main girder of the bridge so as to extend in the extension direction of the main girder; A scaffolding board support portion that supports the plurality of scaffolding boards on the main girder; A movable roof device for scaffolding according to any one of claims 1 to 7; having Bridge scaffolding.

9. The bridge scaffolding according to claim 8, The plurality of scaffolding planks are In a plan view, the main beam is arranged on one side and the other side in the width direction, which is a direction perpendicular to the extension direction, The roof body portion of the scaffolding mobile roof device is In plan view, the top surface of the main girder and the plurality of scaffolding boards are covered in the width direction. Bridge scaffolding.

10. The bridge scaffolding according to claim 9, The scaffolding board support portion is In a plan view, the plurality of scaffolding boards are supported on one side and the other side of the width direction relative to the main girder, Both ends in the width direction of the scaffolding board support portion, In a plan view, it is located outward from both ends of the width direction of the plurality of scaffolding boards arranged on one side and the other side of the width direction, The plurality of rail portions of the scaffolding movable roof device are Supported at both ends in the width direction of the scaffolding board support part, Bridge scaffolding.

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