Working device and method for assembling and disassembling construction scaffold

Abstract

To provide a working device that does not require the rearrangement work of the working device performed every time the working device passes through a bridge pier and can move in the bridge axial direction in a state in which a lower beam is disposed only on one side in the direction perpendicular to the bridge axis of the bridge pier and in a state in which the lower beam is disposed only on one side of the bridge pier, and a construction scaffold assembling and disassembling method for disassembling the scaffold using the working device.SOLUTION: A working device of the present invention includes an upper beam, a lower beam, a side beam, and a floor structure. The floor structure includes a center floor, a left floor, and a right floor. The left floor and the right floor are arranged in a substantially horizontal posture and are folded by rotating outward and downward around a substantially horizontal axis. The lower beam moves in a direction perpendicular to a bridge axis in a state in which the left floor and the right floor are folded.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to technology relating to work related to bridge construction work, such as assembling and dismantling scaffolding, and more specifically, to a mobile work device that can move in the bridge axis direction while avoiding bridge piers, and a construction scaffolding assembling and dismantling method using said device to assemble and dismantle scaffolding. [Background technology]

[0002] Bridge construction work is broadly divided into substructure work, such as abutments and piers, and superstructure work, which mainly involves constructing the deck, and superstructure work is generally carried out after the substructure work is completed. Normally, scaffolding (hereinafter, permanent scaffolding will be referred to as "construction scaffolding") is set up during superstructure work, and deck work, wall balustrade work, painting work, etc. are carried out using this construction scaffolding. Once deck work and wall balustrade work, which are the final stages of bridge construction work, are completed, the construction scaffolding is dismantled as no further work is required.

[0003] Dismantling scaffolding has been considered a difficult task due to the risk of workers falling or tools dropping. Up until now, careful safety management has been implemented, such as by establishing detailed work procedures and using safe construction machinery such as aerial work vehicles, but falls caused by personal misunderstandings or assumptions, or inexperience, cannot be completely avoided.

[0004] Scaffolding is required to dismantle construction scaffolding (hereinafter, scaffolding for dismantling is referred to as "demolition scaffolding"). Although it is possible to install conventional scaffolding such as single-pipe scaffolding or frame scaffolding, in cases where the clearance is large, such as bridges erected in valleys, the scale of such scaffolding becomes huge and unrealistic. In addition, it is also possible to use a bridge inspection vehicle that is placed on the deck and can extend its arm below the deck, but in this case, work efficiency is significantly reduced and safety is not sufficient in terms of preventing workers from falling or falling objects.

[0005] When conventional scaffolding or aerial work vehicles cannot be used, a demolition scaffolding that also serves as a protective work during the dismantling of the construction scaffolding may be installed. This demolition scaffolding has a lower beam placed below the construction scaffolding, and this lower beam functions as a scaffolding and prevents workers from falling or tools from dropping. This lower beam can be supported so that it is suspended from an upper beam placed on the deck, for example.

[0006] Normally, construction scaffolding is installed over almost the entire span, so when using demolition scaffolding, it is necessary to install it over almost the entire span. However, installing demolition scaffolding for the entire span at once is not realistic due to the high cost of materials (rentals) and the costs of installation and dismantling. For this reason, demolition scaffolding that can move in the bridge axis direction is sometimes used. Specifically, as the upper beam with the running body moves on the deck, the lower beam suspended and supported by the upper beam moves in the bridge axis direction.

[0007] The main girders of a bridge are supported by abutments installed on both ends, and in many cases, depending on the span length, they are supported by piers installed midway through the span, as shown in Figure 13. When using the above-mentioned mobile demolition scaffolding on a bridge with a pier midway through the span, the pier acts as an obstacle and the demolition scaffolding cannot move in the bridge axial direction. Therefore, Patent Document 1 proposes a technology that allows the scaffolding to move in the bridge axial direction while avoiding the pier. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2023-000184 A Summary of the Invention [Problem to be solved by the invention]

[0009] According to the technology disclosed in Patent Document 1, a gap can be formed between the substructure (left and right floor structures) that are divided near the center, making it possible to avoid the bridge pier. Specifically, the left and right floor structures are separated by rotating outward and downward, respectively, which allows a gap to be formed between them.

[0010] Considering that the demolition scaffolding must be dismantled and moved and then reassembled each time a pier is passed, the invention of Patent Document 1, which allows the scaffolding to pass through the pier easily and quickly, is an extremely effective technology. However, since the scaffolding must move with the left and right floor structures positioned on either side of the pier, this invention may not be applicable in cases where there are spatial constraints on either side, such as when another structure is nearby.

[0011] The object of the present invention is to solve the problems associated with the conventional technology, namely to provide a working device that does not require the reassembly of the working device each time a pier is passed, and that can move in the direction of the bridge axis with the lower beam positioned only on one side of the pier in the direction perpendicular to the bridge axis, and a construction scaffolding assembling and dismantling method using the working device to assemble and dismantle scaffolding. [Means for solving the problem]

[0012] The present invention was made by focusing on the fact that the lower beam having the floor structure is designed to move in a direction perpendicular to the bridge axis, and that at that time the floor surface is folded to make the cross-sectional size of the lower beam compact, and is an invention based on an unprecedented idea.

[0013] The working device of the present invention comprises an upper beam, a lower beam, a side beam, and a floor structure. The upper beam is disposed above the deck of the bridge in a direction perpendicular to the bridge axis, the lower beam is disposed below the deck in a direction perpendicular to the bridge axis, and the side beam is disposed outside the deck in the vertical direction. The floor structure provided on the upper surface of the lower beam includes a center floor, a left floor, and a right floor, and a slide mechanism provided below the side beam moves the lower beam in a direction perpendicular to the bridge axis. The upper end of the side beam is fixed to the upper beam. The lower beam moves in a direction perpendicular to the bridge axis by the slide mechanism while being supported by the side beam. The upper beam, the lower beam, and the side beam move in the bridge axis direction by a running body attached to the lower surface of the upper beam running on the deck in the bridge axis direction. The left floor and the right floor are disposed in a substantially horizontal (including horizontal) position, and are folded by rotating outward and downward around a substantially horizontal (including horizontal) axis. With the left and right floors folded, the lower beam moves perpendicular to the bridge axis.

[0014] The working device of the present invention may further include a rotation mechanism. The rotation mechanism provided on the side beam rotates the lower beam around a substantially vertical (including vertical) axis. In this case, the lower beam that has moved in a direction perpendicular to the bridge axis is rotated by the rotation mechanism, so that the lower beam is positioned outside the deck and in the direction of the bridge axis.

[0015] The working device of the present invention may be configured so that handrails are installed on the center floor and the left floor. The handrails are arranged in a substantially vertical (including vertical) position and are folded by rotating inward and downward around a substantially horizontal (including horizontal) axis. In this case, with the handrails folded and the left floor and right floor further folded, the lower beam moves in a direction perpendicular to the bridge axis.

[0016] The working device of the present invention may further include a left telescopic means and a right telescopic means. The left telescopic means has one end attached to the lower beam and the other end attached to the left floor, and the right telescopic means has one end attached to the lower beam and the other end attached to the right floor. In this case, when the left telescopic means and the right telescopic means are extended, the left floor and the right floor are arranged in a substantially horizontal (including horizontal) position, and when the left telescopic means and the right telescopic means are contracted, the left floor and the right floor are folded.

[0017] The construction scaffolding assembly and dismantling method of the present invention is a method for assembling or dismantling a construction scaffolding (scaffolding set up when constructing a bridge) using the working device of the present invention, and is a method including an installation process, a relocation process, and a partial assembly and dismantling process. In the installation process, the working device is installed so that the upper beam is above the deck, the lower beam is below the deck, and the side beams are on the outside of the deck. In the relocation process, the working device is moved in the bridge axis direction by running the traveling body, and in the partial assembly and dismantling process, the construction scaffolding within the range where the working device is placed after the movement is assembled or dismantled. Then, once the construction scaffolding is assembled or dismantled in the partial assembly and dismantling process, the relocation process is carried out again.

[0018] The construction scaffolding assembly and dismantling method of the present invention can also be a method further comprising a floor section storage step, a lower beam sliding step, and a lower beam rotating step. In this floor section storage step, the left and right floors arranged in a substantially horizontal (including horizontal) position are folded so as to approach the lower beam. In the lower beam sliding step, the lower beam is moved in a direction perpendicular to the bridge axis while the left and right floors are folded, and in the lower beam rotating step, the lower beam moved in the direction perpendicular to the bridge axis is rotated by a rotation mechanism to position the lower beam outside the deck slab in the bridge axis direction. In this case, in the relocation step when passing through the pier, the floor section storage step, the lower beam sliding step, and the lower beam rotating step are performed, and then the working device is moved in the bridge axis direction. Effect of the Invention

[0019] The working device and the construction scaffolding assembling and dismantling method of the present invention have the following effects. (1) When assembling or dismantling the scaffolding, the floor structure can be used as the scaffolding. As a result, it is possible to prevent industrial accidents such as falls by workers and damage to third parties caused by tools falling, especially in urban areas. (2) It is sufficient to install the working equipment only on a portion of the entire span of the bridge, and there is no need to replace the working equipment every time a pier is passed. Therefore, assembly and dismantling work can be carried out safely and in a shorter time than before. (3) It can be used as a scaffold for other work, such as touch-up work, painting the main body, assembling and dismantling deck formwork, assembling and dismantling scaffolding, bridge inspection work, and maintenance work. [Brief description of the drawings]

[0020] [Figure 1] A cross-sectional view showing a schematic diagram of construction scaffolding installed under the main girder supporting the bridge deck. [Diagram 2] 1 is a cross-sectional view perpendicular to the bridge axis showing the working device of the present invention. [Diagram 3] FIG. 2A is a cross-sectional view in the bridge axis direction showing the working device of the present invention, and FIG. 2B is a plan view showing the working device of the present invention. [Figure 4] FIG. 3 is a cross-sectional view in the bridge axis direction showing an example of a running body. [Diagram 5] (a) is a cross-sectional view in the bridge axis direction showing the floor structure "when in use", and (b) is a cross-sectional view in the bridge axis direction showing the floor structure on the right side "when stored". [Figure 6] (a) is a plan view showing the scaffold floor in use, and (b) is a plan view showing the scaffold floor in stored state. [Figure 7] A cross-sectional view in the bridge axis direction showing the sliding mechanism and the rotating mechanism attached near the lower end of the side beam. [Figure 8] FIG. 2 is a cross-sectional view perpendicular to the bridge axis, showing a schematic view of a lower beam supported by a slide mechanism so as to be slidable in the direction perpendicular to the bridge axis. [Figure 9](a) is a cross-sectional view in the direction perpendicular to the bridge axis, which shows a schematic diagram of the lower beam material held by the slide mechanism, and (b) is a cross-sectional view in the direction of the bridge axis, which shows a schematic diagram of the lower beam material held by the slide mechanism. Lower beam material 120H [Figure 10] FIG. 4 is a plan view showing a rotation mechanism attached near the lower end of the side beam. [Figure 11] (a) is a plan view showing the lower beam arranged perpendicular to the bridge axis, and (b) is a plan view showing the lower beam arranged in the direction of the bridge axis by rotating. [Figure 12] 1 is a flow chart showing the flow of main steps in the scaffolding assembly and disassembly method of the present invention. [Figure 13] FIG. 1 is a side view showing a schematic diagram of a bridge whose main girders are supported by abutments and piers. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] An embodiment of the working device and the construction scaffolding assembly and dismantling method of the present invention will be described with reference to the drawings. The present invention can be implemented for various bridge-related tasks such as scaffolding assembly and dismantling, main body painting work, touch-up work, deck formwork assembly and dismantling, bridge inspection work, and maintenance work, but for convenience, an example will be described here that targets the assembly and dismantling work of a construction scaffolding SF (permanent scaffolding for superstructure work) as shown in Figure 1. Figure 1 is a cross-sectional view that shows a schematic diagram of the construction scaffolding SF installed under the main girder MG that supports the bridge deck DC.

[0022] 1.Work equipment The method of assembling and dismantling a construction scaffold of the present invention is a method of assembling and dismantling a construction scaffold using the working device of the present invention. Therefore, the working device of the present invention will be described first, and then the method of assembling and dismantling a construction scaffold of the present invention will be described. Figures 2 and 3 show the working device 100 of the present invention, where Figure 2 is a cross-sectional view cut in a vertical plane perpendicular to the bridge axis, Figure 3(a) is a cross-sectional view cut in a vertical plane in the bridge axis direction, and Figure 3(b) is a plan view seen from above.

[0023] As shown in Fig. 2, the working device 100 of the present invention is configured to include an upper beam 110, a lower beam 120, a side beam 130, a floor structure 140, and a slide mechanism 150, and may further include a rotation mechanism 160 and telescopic means (left telescopic means and right telescopic means) described later. The upper beam 110, the lower beam 120, and the side beam 130 are beam materials whose axial dimension is superior to their cross-sectional dimensions, and among them, the upper beam 110 is disposed above the bridge deck DC in the direction perpendicular to the bridge axis, while the lower beam 120 is disposed below the bridge deck DC in the direction perpendicular to the bridge axis. The side beam 130 is disposed on the outside of the bridge deck DC in the vertical direction. Here, "outside the bridge deck DC" refers to a position away from the bridge deck DC to the left or right as viewed in the bridge axis direction, or in other words, a position that does not overlap with the bridge deck DC as viewed in the bridge axis direction.

[0024] A travelling body 111 is attached to the underside of the upper beam 110, and the upper beam 110 is supported by the bridge deck DC by placing the travelling body 111 on the upper surface of the bridge deck DC. The end of the upper beam 110 (the right end in FIG. 2) and the upper end of the side beam 130 are fixed, and the lower beam 120 is supported so as to be suspended by the side beam 130. In this way, the upper beam 110, the lower beam 120, and the side beam 130 are connected to each other, and when the travelling body 111 travels on the bridge deck DC in the bridge axis direction as described later, the upper beam 110, the lower beam 120, and the side beam 130 also move in the bridge axis direction. The lower beam 120 can be supported in a cantilever type structure by only the side beam 130, or can be supported at both ends together with the hanging wire WR hanging down from the upper beam 110 and the hanging wire WR hanging down from the main girder MG as shown in FIG. 2.

[0025] As shown in Fig. 3(a), a floor structure 140 is provided on the upper surface of the lower beam 120. This floor structure 140 is provided with a scaffold floor 141 that allows workers to safely assemble and dismantle the construction scaffold SF, and may further be provided with handrails 142 to prevent workers from falling.

[0026] Below, each of the main elements constituting the working apparatus 100 of the present invention will be described in detail.

[0027] (upper beam) As described above, the upper beam 110 is a beam material with excellent directional dimensions, and is disposed above the bridge deck DC and perpendicular to the bridge axis. This upper beam 110 supports the side beams 130 and the lower beam 120 on the bridge deck DC, and has a structure capable of resisting a predetermined bending moment and shear force, and can be, for example, a truss structure.

[0028] As shown in FIG. 4, a running body 111 is attached to the underside of the upper beam 110. This running body 111 can move on the bridge deck DC in the bridge axis direction. This figure shows an example in which wheels are used as the running body 111, and a mechanism for moving in the bridge axis direction is used to use a rail RL laid along the bridge axis direction. Specifically, the running body 111 (wheels) is placed on the rail RL, and the working device 100 is moved in the bridge axis direction by pulling a wire rope or the like connected to the upper beam 110 with a pulling means. The rail RL can be configured by installing a flat bar on a beam material such as a square steel pipe or H-shaped steel, and a chill hole, a chain block, a hoist, a winch, or the like can be used as the pulling means. It is advisable to provide a stopper at an appropriate position on the rail RL to prevent the working device 100 from falling off. The running body 111 is not limited to the configuration shown in FIG. 4, and any conventionally used technology can be used, such as a self-propelled type consisting of a combination of power and tires (or crawlers).

[0029] (Side beam) As described above, the side beam 130 is a beam material with excellent directional dimensions, and is disposed in the vertical direction outside the bridge deck DC. This side beam 130 supports the lower beam 120 by suspending it from above, and has a structure capable of resisting a predetermined bending moment and shear force, and can be, for example, a truss structure. A slide mechanism 150 and a rotation mechanism 160 are installed at the lower end (or around it) of the side beam 130, and this lower end (particularly the slide mechanism 150) supports the lower beam 120.

[0030] (lower beam) As described above, the lower beam 120 is a beam material with excellent directional dimensions, and is disposed below the bridge deck DC and perpendicular to the bridge axis. This lower beam 120 is supported from above by the side beams 130, and is structured to be capable of resisting bending moments and shear forces due to loads (its own weight, the weight of workers, etc.), and can be, for example, a truss structure.

[0031] (floor structure) 5 is a diagram showing the floor structure 140, where (a) is a cross-sectional view in the bridge axis direction showing the floor structure 140 in the "usage state", and (b) is a cross-sectional view in the bridge axis direction showing the floor structure 140 in the "storage state" on the right side. Here, the "use state" refers to the state when workers perform assembly and dismantling work on the construction scaffolding SF, and the scaffolding floor 141 forms a continuous plane. On the other hand, the "storage state" refers to the state when the lower beam 120 moves in the direction perpendicular to the bridge axis, as described later, and a part of the scaffolding floor 141 is folded up.

[0032] As shown in FIG. 5, the floor structure 140 includes a foothold floor 141 and may further include a handrail 142. The foothold floor 141 includes a center floor 141C disposed in the center, a left floor 141L disposed on the left side of the center floor 141C, and a right floor 141R disposed on the right side of the center floor 141C. The left floor 141L and the right floor 141R are hinged so as to rotate around a substantially horizontal (including horizontal) axis (in FIG. 5, the depth direction of the paper). Specifically, as shown in FIG. 5(b), the right floor 141R rotates around its left end (center end) so that its right end draws an arc, and similarly, the left floor 141L rotates around its right end (center end) so that its left end draws an arc. That is, the scaffold floor 141 in the used state is folded by rotating the left floor 141L outwardly downward (counterclockwise in the figure), and folded by rotating the right floor 141R outwardly downward (clockwise in the figure), so that the scaffold floor 141 is in the stored state. At this time, the left floor 141L and the right floor 141R hang down approximately vertically (including vertically) so as to approach the lower beam 120.

[0033] To rotate the left floor 141L and the right floor 141R, for example, a "telescopic means" such as a jack, part of which is telescopic, can be used. In the example of FIG. 5, a left telescopic means 171 for rotating the left floor 141L and a right telescopic means 172 for rotating the right floor 141R are provided. One end (the lower end in the figure) of the left telescopic means 171 is attached to a part of the lower beam 120, and the other end (the upper end in the figure) is attached to a part of the left floor 141L. Similarly, one end (the lower end in the figure) of the right telescopic means 172 is attached to a part of the lower beam 120, and the other end (the upper end in the figure) is attached to a part of the right floor 141R. As a result, when the left telescopic means 171 and the right telescopic means 172 are respectively extended, the left floor 141L and the right floor 141R are placed in an approximately horizontal (including horizontal) position in an operational state, whereas when the left telescopic means 171 and the right telescopic means 172 are respectively contracted, the left floor 141L and the right floor 141R are placed in a stored state in which they hang down approximately vertically (including vertically) downward.

[0034] As shown in FIG. 5(b), the handrail 142 can be hinged to rotate around a substantially horizontal (including horizontal) axis (in the figure, the depth direction of the paper), similar to the left floor 141L and the right floor 141R. In this case, the handrail 142 rotates so that its upper end draws an arc around its lower end. That is, the handrail 142 arranged in a substantially vertical (including vertical) position (i.e., in a used state) is folded by the handrail 142 attached to the left floor 141L rotating downward to the right (clockwise in the figure), and the handrail 142 attached to the right floor 141R rotating downward to the left (counterclockwise in the figure). At this time, the handrail 142 is arranged so as to be folded over the left floor 141L and the right floor 141R, and the left floor 141L and the right floor 141R rotate in this folded over state with the handrail 142.

[0035] In order to make the scaffold floor 141 in the used state more stable, a support material 173 can be provided as shown in FIG. 5(a). In addition to the left telescopic means 171 and the right telescopic means 172, the support material 173 supports the scaffold floor 141 from below, making the scaffold floor 141 in the used state more stable. However, when the scaffold floor 141 is changed from the used state to the stored state, this support material 173 becomes an obstacle. Therefore, it is preferable that one end of this support material 173 is hinged and the other is detachably connected, or both ends are detachably connected.

[0036] 6 is a plan view of the scaffold floor 141 seen from above, where (a) is a plan view showing the scaffold floor 141 in use, and (b) is a plan view showing the scaffold floor 141 in a stored state. As can be seen from this figure, the cross-sectional dimension (width dimension) of the scaffold floor 141 in the stored state is reduced and compact compared to the used state.

[0037] (Slide mechanism) Fig. 7 is a cross-sectional view in the bridge axis direction showing the slide mechanism 150 and the rotation mechanism 160 attached near the lower end of the side beam 130. As shown in this figure, the lower beam 120 is supported so as to be suspended near the lower end of the side beam 130, and more specifically, as shown in Fig. 8, it is supported so as to be able to slide in the direction perpendicular to the bridge axis by the slide mechanism 150.

[0038] FIG. 9 is a cross-sectional view showing a state where a member constituting the lower beam 120 (hereinafter referred to as the "lower beam material 120H") is gripped by the slide mechanism 150, where (a) is a cross-sectional view in the direction perpendicular to the bridge axis, and (b) is a cross-sectional view in the direction of the bridge axis. As shown in this figure, the slide mechanism 150 supports the lower beam 120 so as to suspend it by gripping a part of the lower beam material 120H. For example, as shown in FIG. 9(a), the slide mechanism 150 can be installed at two locations separated in the direction perpendicular to the bridge axis, and as shown in FIG. 9(b), each of the installation locations can be installed at two locations separated in the direction of the bridge axis, that is, four locations. Each slide mechanism 150 grips a part of the lower beam material 120H. The slide mechanism 150 has a rotating body such as a roller or a tire, and by gripping a part of the lower beam material 120H with the upper and lower rotating bodies, the lower beam 120 can slide in the direction perpendicular to the bridge axis. In the example of FIG. 9, an electric trolley is used as the slide mechanism 150, and upper and lower rotating bodies grip the upper flange of a lower beam 120H (H-shaped steel in this figure).

[0039] (Rotation mechanism) Fig. 10 is a plan view showing the rotation mechanism 160 attached near the lower end of the side beam 130. Fig. 11 is a plan view showing the state in which the lower beam 120 is rotated by the rotation mechanism 160, where (a) is a plan view showing the lower beam 120 arranged in a direction perpendicular to the bridge axis, and (b) is a plan view showing the lower beam 120 arranged in the bridge axis direction by rotation. The rotation mechanism 160 can use a device such as a turntable, and rotates the lower beam 120 on a substantially horizontal (including horizontal) plane as shown in Fig. 11.

[0040] (Example of use) In the assembly and dismantling work of the construction scaffold SF using the working device 100 of the present invention, an example of the procedure for the working device 100 to move in the bridge axis direction while avoiding the pier PR will be described. First, the handrail 142 attached to the left floor 141L is folded, and the handrail 142 attached to the right floor 141R is folded, so that the handrail 142 is arranged so as to overlap the left floor 141L and the right floor 141R. Next, in the state where the handrail 142 is folded and overlapped, the left floor 141L and the right floor 141R are rotated, respectively, to put the floor structure 140 into a stored state. For example, the left floor 141L is folded by contracting the left telescopic means 171, and the right floor 141R is folded by contracting the right telescopic means 172, so that the left floor 141L and the right floor 141R are arranged to hang down approximately vertically downward. At this time, if the scaffold floor 141 is supported by the support material 173, it is advisable to remove the support material 173 beforehand and then rotate the left floor 141L and the right floor 141R.

[0041] When the floor structure 140 is in the stored state, the slide mechanism 150 moves the lower beam 120 away from the bridge deck DC while in the stored state. Then, for example, when the lower beam 120 moves until the vicinity of the center of the lower beam 120 is positioned below the side beam 130, the rotation mechanism 160 rotates the lower beam 120. As a result, the lower beam 120 is positioned outside the bridge deck DC so that it is in the bridge axis direction, and the working device 100 can move in the bridge axis direction while avoiding the pier PR, even if there is one. Note that if the entire lower beam 120 can be moved to the outside of the bridge deck DC by the slide mechanism 150, the working device 100 can move while avoiding the pier PR, that is, the rotation mechanism 160 can be omitted.

[0042] 2. Scaffolding assembly and disassembly method Next, the construction scaffolding assembling and dismantling method of the present invention will be described with reference to Fig. 12. The construction scaffolding assembling and dismantling method of the present invention is a method for assembling and dismantling a construction scaffolding using the working device 100 described so far. Therefore, we will avoid any explanation that overlaps with the contents explained about the working device 100, and will only explain the contents unique to the construction scaffolding assembling and dismantling method of the present invention. In other words, the contents not described here are the same as those explained in "1. Working device".

[0043] FIG. 12 is a flow diagram showing the flow of the main steps of the construction scaffolding assembly and dismantling method of the present invention. As shown in this figure, first, the working device 100 of the present invention is installed on the bridge deck DC at a predetermined position in the bridge axis direction (for example, on the starting point side) (Step 201 in FIG. 12). Specifically, the working device 100 is installed so that the upper beam 110 is above the bridge deck DC, the lower beam 120 is below the bridge deck DC, and the side beam 130 is on the outside of the bridge deck DC. Then, the working device 100 is moved in the bridge axis direction. At this time, if there is a pier PR in the planned movement section (Yes in Step 202 in FIG. 12), the floor storage step (Step 203 in FIG. 12) is performed, while if there is no pier PR (No in Step 202 in FIG. 12), the relocation step (Step 206 in FIG. 12) and the partial assembly and dismantling step (Step 208 in FIG. 12) described later are performed.

[0044] In the floor section storage step (Step 203 in FIG. 12), the floor structure 140 is stored. Specifically, the handrail 142 attached to the left floor 141L is folded, and the handrail 142 attached to the right floor 141R is folded, so that the handrail 142 is arranged so as to overlap the left floor 141L and the right floor 141R. Next, in the folded-over state with the handrail 142, the left telescopic means 171 is contracted to fold the left floor 141L, and the right telescopic means 172 is contracted to fold the right floor 141R, so that the floor structure 140 is stored.

[0045] When the floor structure 140 is put into the stored state, the slide mechanism 150 moves the lower beam 120 away from the bridge deck DC while keeping it in the stored state (Step 204 in FIG. 12). Then, for example, when the lower beam 120 moves until the vicinity of the center thereof is positioned below the side beam 130, the rotation mechanism 160 rotates the lower beam 120 (Step 205 in FIG. 12). As a result, the lower beam 120 is positioned outside the bridge deck DC so that it is in the bridge axis direction, and the working device 100 can move in the bridge axis direction while avoiding even if there is a bridge pier PR (Step 206 in FIG. 12).

[0046] When the working device 100 advances in the bridge axis direction to a position beyond the pier PR, the lower beam 120 is returned to its original position so that the construction scaffold SF can be assembled or dismantled (Step 207 in FIG. 12). Specifically, the lower beam 120 is rotated by the rotation mechanism 160 to be positioned perpendicular to the bridge axis, and the lower beam 120 is moved by the slide mechanism 150 until it is positioned below the bridge deck DC. Then, the left telescopic means 171 is extended to position the left floor 141L in a substantially horizontal position, and the right telescopic means 172 is extended to position the left floor 141L in a substantially horizontal position, and each handrail 142 is positioned in a substantially vertical position, thereby putting the floor structure 140 into use.

[0047] When the floor structure 140 is put into use, the construction scaffolding SF within the range in which the working device 100 has been placed after movement is assembled or dismantled (Step 208 in FIG. 12). If there is still construction scaffolding SF to be assembled or dismantled (No in Step 209 in FIG. 12), Steps 202 to 208 are repeated, whereas when all the construction scaffolding SF has been assembled or dismantled (Yes in Step 209 in FIG. 12), the working device 100 is assembled or dismantled and removed from the bridge deck DC (Step 210 in FIG. 12). [Industrial Applicability]

[0048] The working device and the construction scaffolding assembly and dismantling method of the present invention can be used for bridges of all kinds, such as road bridges and railway bridges, and can be used for bridges that cross various types of bridges, such as bridges that cross rivers, overpasses, overpasses, etc. According to the present invention, it is possible to prevent accidents involving workers falling or tools dropping, and thus it is possible to prevent third party damage. In other words, considering that the present invention provides safer work, it can be said that the invention is not only applicable to industry, but also has the potential to make a great contribution to society. [Explanation of symbols]

[0049] 100 Working device of the present invention 110 (Work equipment) upper beam 111 (Work equipment) running body 120 (Working equipment) Lower beam 120H (Lower Beam) Lower Beam Material 130 Side beam (for working equipment) 140 (Floor structure for work equipment) 141 (floor structure) scaffolding floor 141C (Scaffolding Floor) Center Floor 141L (Scaffolding Floor) Left Side Floor 141R (Scaffolding Floor) Right Side Floor 142 (floor structure) handrail 150 (Work equipment) slide mechanism 160 Rotating mechanism (for working equipment) 171 (Working equipment) left telescopic means 172 Right telescopic means (for working equipment) 173 (Supporting material for work equipment) DC bridge deck slab MG main girder PR Bridge pier RL rail SF Construction scaffolding WR Suspension Wire

Claims

1. An upper beam disposed above the bridge deck and perpendicular to the bridge axis; A lower beam arranged below the deck and perpendicular to the bridge axis; A side beam disposed on the outer side of the floor slab in the vertical direction; A floor structure provided on an upper surface of the lower beam and including a center floor, a left floor, and a right floor; a slide mechanism provided below the side beam and configured to move the lower beam; The upper ends of the side beams are fixed to the upper beam, The lower beam is supported by the side beam and moves in a direction perpendicular to the bridge axis by the slide mechanism. A running body attached to the underside of the upper beam runs on the deck in the bridge axis direction, causing the upper beam, the lower beam, and the side beam to move in the bridge axis direction; The left side floor and the right side floor are arranged in a horizontal or substantially horizontal position and are folded by rotating outward and downward around a horizontal or substantially horizontal axis; With the left and right floors folded, the lower beam moves perpendicular to the bridge axis. A working device characterized by:

2. A rotation mechanism is provided on the side beam and rotates the lower beam around a vertical or approximately vertical axis, The lower beam that has moved in the direction perpendicular to the bridge axis is rotated by the rotation mechanism, so that the lower beam is disposed outside the deck and in the bridge axis direction.

2. The working device according to claim 1.

3. The floor structure includes handrails installed on the central floor and the left side floor, The handrail is arranged in a vertical or substantially vertical position and is folded by rotating inward and downward around a horizontal or substantially horizontal axis, With the handrail folded, the lower beam moves perpendicular to the bridge axis.

2. The working device according to claim 1.

4. A left telescopic means having one end attached to the lower beam and the other end attached to the left floor; A right telescopic means having one end attached to the lower beam and the other end attached to the right side floor, When the left telescopic means and the right telescopic means are extended, the left floor and the right floor are arranged in a horizontal or substantially horizontal position, When the left telescopic means and the right telescopic means are contracted, the left side floor and the right side floor are folded.

2. The working device according to claim 1.

5. A method for assembling or dismantling a construction scaffolding installed when constructing a bridge using the working device according to claim 1, an installation process of installing the working device so that the upper beam is above the deck, the lower beam is below the deck, and the side beam is outside the deck; A relocation process of moving the working device in the bridge axis direction by traveling the traveling body; A partial assembly and disassembly process for assembling or disassembling the construction scaffolding within the range in which the working device is arranged after the movement, When the construction scaffolding is assembled or disassembled in the partial assembly and disassembly process, the relocation process is performed again. A construction scaffolding assembly and disassembly method.

6. The working device has a rotation mechanism provided on the side beam and configured to rotate the lower beam around a vertical or approximately vertical axis, a floor section storing step of folding the left floor section and the right floor section arranged in a horizontal or substantially horizontal position so as to approach the lower beam; a lower beam sliding process of moving the lower beam in a direction perpendicular to the bridge axis while the left floor and the right floor are folded; A lower beam rotation process is further provided, in which the lower beam that has been moved in the direction perpendicular to the bridge axis is rotated by the rotation mechanism to position the lower beam outside the deck and in the bridge axis direction, In the relocation process when passing through a bridge pier, the floor storage process, the lower beam sliding process, and the lower beam rotation process are performed, and then the working device is moved in the bridge axis direction. The scaffolding assembling and dismantling method according to claim 5.

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