JP2022011480A - Suspended scaffold equipment and suspended scaffold operation method - Google Patents

Abstract

To prevent damage to a suspended scaffold even in a case of rough sea conditions.SOLUTION: The suspended scaffold equipment comprises a suspended scaffold 2 suspended from a pier 101 installed above a body of water and arranged below the pier 101, and an electric hoist 4 that raises and lowers the suspended scaffold 2. When a worker rides on the suspended scaffold 2 to perform work, the electric hoist 4 can set the suspended scaffold 2 at a first height, and at a predetermined time not during work, the electric hoist 4 can set the suspended scaffold 2 at a second height closer to the pier 101 side than the first height.SELECTED DRAWING: Figure 3

Description

Regarding suspension scaffolding equipment used when constructing revetment equipment and its operation method.

For example, in the construction of a new pier / revetment facility, which is a civil engineering structure in the coastal area of the sea, it may be necessary to suspend the suspended scaffolding from the pier and place it under the pier as temporary work. be. At this time, the installation height of the suspended scaffold is set to be higher than a predetermined height from the sea surface based on the sea conditions of the surrounding sea area, and the work can be carried out on the suspended scaffold.

On the other hand, there is known a method of erection of a suspended scaffold in which the suspended scaffold can be easily erected on a bridge (see, for example, Patent Document 1). In this erection method, the suspended scaffold with a float is floated on the water to the lower part of the bridge, the suspended scaffold with a float is pulled up from the water surface toward the back surface of the bridge, and the suspended scaffold with a float is fixed to the bridge.

Japanese Patent No. 6018691

By the way, if the sea conditions are roughened by stormy weather such as typhoons after installing the suspended scaffolding, the suspended scaffolding may be damaged by the effects of high tides, waves, strong winds, etc., and it may take a lot of labor, time and cost to restore it. rice field. In order to prevent such damage, it was necessary to remove the suspended scaffolding in advance when stormy weather was predicted, but it took a lot of labor, time, and cost to remove and re-install it. Further, even in the erection method described in Patent Document 1, since the suspended scaffold with a float is suspended and fixed to the bridge, the height of the suspended scaffold with a float remains at a height at which work can always be performed (because it is close to the sea surface). ), If the sea surface becomes rough, the suspended scaffold with float may be damaged.

Therefore, an object of the present invention is to provide a suspended scaffolding facility and a suspended scaffolding operation method that can prevent and suppress damage to the suspended scaffolding even if the sea condition is rough.

In order to solve the above problems, the invention of claim 1 comprises a suspended scaffold suspended from a structure installed above the water area and arranged below the structure, and an elevating means for raising and lowering the suspended scaffold. When the worker rides on the suspended scaffold to perform the work, the suspended scaffold can be arranged at the first height by the elevating means, and the elevating means can be used at a predetermined time other than the work. The suspended scaffolding facility is characterized in that the suspended scaffolding can be arranged at a second height closer to the structure side than the first height.

The invention of claim 2 is characterized in that the suspended scaffolding equipment according to claim 1 is provided with a supporting means for supporting the suspended scaffold when the suspended scaffold is at the first height.

The invention of claim 3 is characterized in that, in the suspended scaffolding equipment according to claim 1 or 2, the suspended scaffold is made of a perforated plate having a larger hole occupancy than the non-hole portion.

The invention of claim 4 is characterized in that, in the suspension scaffolding equipment according to claims 1 to 3, a plurality of the elevating means are provided, and the plurality of the elevating means can be started at the same time.

According to the fifth aspect of the present invention, the suspended scaffolding which is arranged below the structure installed above the water area and which can be raised and lowered is arranged at the first height when the worker rides on the suspended scaffolding and performs the work. The suspended scaffolding operation method is characterized in that the scaffolding is arranged at a second height closer to the structure side than the first height at a predetermined time other than the work.

The invention of claim 6 is characterized in that, in the suspension scaffolding operation method according to claim 5, when a plurality of elevating means for raising and lowering the suspended scaffolding are provided, the plurality of the raising and lowering means are simultaneously activated.

According to the first aspect of the present invention, the suspended scaffolding is arranged by the elevating means at a second height closer to the structure side than the first height, that is, at a height farther from the water surface at a predetermined time other than the working time. It is possible. For this reason, for example, by arranging the suspended scaffolding at a second height near the structure side after the work of the day is completed (at a predetermined time), even if the sea elephant becomes rough, high tides and waves can be generated. It is possible to prevent and suppress damage to the suspended scaffolding due to the influence of strong winds. As a result, it is possible to reduce the labor, time, and cost required for the restoration.

According to the second aspect of the present invention, when the suspended scaffold is at the first height, that is, when the worker rides on the suspended scaffold to perform the work, the suspended scaffold is supported by the supporting means, so that the suspended scaffold is on the suspended scaffold. It is possible to work stably with.

According to the third aspect of the present invention, since the suspended scaffold is composed of the perforated plate, the water pressure that the suspended scaffold receives from seawater or the like is relaxed, and it is possible to further prevent or suppress the damage of the suspended scaffold. .. Further, since the suspended scaffold is composed of the perforated plate, the suspended scaffold can be reduced in weight, and the lifting means for raising and lowering the suspended scaffold can be simplified and reduced in weight.

According to the invention of claim 4, since a plurality of elevating means can be started at the same time, the suspended scaffold can be raised and lowered at the same time by the plurality of elevating means, and the suspended scaffold can be raised and lowered appropriately (parallel) without bias. It is possible to make it.

According to the fifth aspect of the present invention, the suspended scaffolding is arranged at a second height closer to the structure side than the first height, that is, at a height farther from the water surface, at a predetermined time other than the working time. Therefore, as in the invention of claim 1, for example, by arranging the suspended scaffolding at a second height close to the structure side after the work of one day is completed (at a predetermined time), even if the sea image becomes rough. Even if it does, it is possible to prevent and suppress damage to the suspended scaffolding due to the effects of high tides, waves, and strong winds. As a result, it is possible to reduce the labor, time, and cost required for the restoration.

According to the invention of claim 6, since a plurality of elevating means are activated at the same time, the suspended scaffold can be raised and lowered at the same time by a plurality of elevating means as in the invention of claim 4, and the suspension scaffolding can be appropriately (parallel) without bias. It is possible to raise and lower the suspended scaffolding in a stable manner.

It is a front view which shows the state at the time of work of the suspension scaffolding equipment which concerns on embodiment of this invention. It is a plan view (a) which shows the frame body of the suspension scaffold of the suspension scaffolding equipment of FIG. 1, and the front view (b) which shows the arrangement position of the chain which suspends a frame body. It is a cross-sectional view (hatching omitted) of AA of the suspension scaffolding equipment of FIG. It is a top view which shows the expand panel of the suspension scaffold of the suspension scaffold equipment of FIG. It is a figure which shows the connecting structure of the expanded panel of the suspension scaffolding equipment of FIG. It is a perspective view which shows the suspension state of the suspension scaffold of the suspension scaffolding equipment of FIG. It is a side view (a) and a front view (b) which show the periphery of the electric hoist of the suspension scaffolding equipment of FIG. It is a front view which shows the state of the suspension scaffolding equipment of FIG. 1 at a predetermined time. FIG. 8 is a cross-sectional view taken along the line BB of FIG. 8 (hatching omitted).

Hereinafter, the present invention will be described based on the illustrated embodiment.

1 to 9 show the embodiment, FIG. 1 is a front view showing a working state of the suspended scaffolding equipment 1 according to the embodiment, and FIG. 8 is a front view showing the working state of the suspended scaffolding equipment 1. It is a front view which shows the state at a predetermined time other than time. This suspended scaffolding facility 1 is a scaffolding facility for workers to ride when constructing a structure installed above the water area, and in this embodiment, the water area is the sea area W and the structure is located in the coastal area of the sea area. The case where the pier 101 is installed will be described below as an example.

Here, in the pier 101, a slab (main girder) 103 is erected between the dolphins (major pillars) 102, and the central portion of the slab 103 is supported by the intermediate pillar 104, and such a structure is continuously configured. ing. Further, as shown in FIG. 3, fall prevention fences (handrails) 103a are provided on both side edges of the slab 103 in the longitudinal direction.

The suspended scaffolding equipment 1 mainly includes a suspended scaffolding 2, various chains (supporting means) 31 and 32, and an electric hoist (elevating means) 4.

The suspension scaffold 2 is suspended from the pier 101 and is arranged below the pier 101 (just below the slab 103) for a worker or the like to ride on. From the frame 21 and the expand panel (perforated plate) 22 or the like. It is configured. As shown in FIG. 2A, the frame 21 is a frame in which a plurality of single pipes (metal pipes) 211 to 213 are assembled in a lattice plate shape, and the lattice holes are substantially rectangular. The outer contour of the plane of the frame 21 is substantially rectangular, the length in the short direction is set longer than the width of the slab 103, and the length in the long direction is the dolphin 102 and the intermediate column in this embodiment. It is set to be slightly smaller than the length of the slab 103 between 104 and 104. On the other hand, a plurality of frame bodies 21 may be arranged between the dolphin 102 and the intermediate column 104 along the longitudinal direction of the slab 103. Further, as shown in FIG. 3, handrails 214 that stand up perpendicular to the plane of the frame body 21 are arranged on both long sides of the frame body 21.

As shown in FIG. 4, the expanded panel 22 is a plate in which the occupancy rate of the hole 22a is larger than the occupancy rate of the non-hole portion 22b. In this embodiment, a metal plate having staggered cuts is spread out. It is a net-like plate in which rhombic and hexagonal holes 22a are formed. The planar shape of the expanding panel 22 is a substantially rectangular shape that closes the lattice holes of the frame body 21, and a plurality of expanding panels 22 are connected and arranged on the upper surface of the frame body 21.

Specifically, a plurality of expanding panels 22 are spread on the frame 21 while overlapping the ends of the adjacent expanding panels 22 on the single tubes 211 to 213. Then, as shown in FIG. 5, both screw portions 221a of the U-shaped bolt 221 are inserted into the overlapping portion of the end portions of the expand panel 22 so as to sandwich the single pipes 211 to 213, and the nut 222 is inserted into the double screw portions 221a. It is tightened. As a result, the plurality of expand panels 22 are attached to the frame 21 while being connected without gaps.

The chains 31 and 32 are deformable metal chains that support the suspended scaffold 2 when the suspended scaffold 2 is at the first height, that is, when an operator rides on the suspended scaffold 2 to perform work. It is a thing. As shown in FIG. 2B, the suspension chain 31 is a chain that extends in a substantially vertical direction to support the suspension scaffold 2, and its upper end is fixed and connected to the lower surface of the slab 103 or the suspension chain pedestal 5 described later. , The lower end is fixed to the suspended scaffold 2. Specifically, the suspension chain 31 whose lower end is fixed to the first support point P1 along the longitudinal direction at the center of the frame 21 shown in FIGS. 2A and 6 has a slab at its upper end. It is fixed to the lower surface of 103. Further, the suspension chain 31 whose lower end is fixed to the second support point P2 on both long sides of the frame 21 has its upper end fixed to the suspension chain pedestal 5.

The length of the suspension chain 31, that is, the first height of the suspension scaffold 2 during work, allows an operator to ride on the suspension scaffold 2 and perform proper work, and is normal based on the sea conditions of the surrounding sea area. Occasionally, the suspended scaffold 2 is set to be separated from the sea surface by a predetermined distance or more to ensure safety. Here, the work in the present invention includes all operations performed on the pier 101, such as construction, inspection, and repair. Further, the strength and the number of arrangements of the suspension chains 31 are set so that the suspension scaffold 2 on which the operator rides can be stably supported.

As shown in FIG. 2B, the anti-sway chain 32 is a chain that prevents the suspended scaffold 2 from shaking, and is arranged on both edges of the suspended scaffold 2 (both long sides of the frame 21). ing. That is, the upper end portion is fixed and connected to the side surface of the dolphin 102 or the intermediate pillar 104, and the lower end portion is fixed to the central portion of the frame 21 of the suspension scaffold 2 diagonally downward. Further, the strength and the number of arrangements of the anti-sway chain 32 are set so as to effectively prevent and suppress the suspension scaffold 2 on which the operator rides from shaking.

The electric hoist 4 is an elevator that raises and lowers the suspension scaffold 2, and a plurality of electric hoists 4 are arranged along the longitudinal direction of the slab 103. That is, as shown in FIGS. 1 and 3, a plurality of suspension chain mounts 5 are continuously arranged on both side surfaces of the slab 103 at predetermined intervals. In this embodiment, the suspension chain pedestal 5 is made of an angle member having an L-shaped cross section, and as shown in FIG. 7, is connected to a vertical portion 51 and an upper portion of the vertical portion 51 and extends substantially horizontally. It has a horizontal portion 52. The vertical portion 51 is fixed to the side surface of the slab 103 with anchor bolts 53, and the vertical portion 51 and the horizontal portion 52 are connected by a reinforcing plate 54 extending diagonally.

The electric hoist 4 is attached to a predetermined suspension chain mount 5 among such a plurality of suspension chain mounts 5. That is, the number and position of the electric hoists 4 are arranged so that the suspended scaffolding 2 can be raised and lowered stably based on the size and weight of the hanging scaffold 2 and the capacity (elevable weight) of the electric hoist 4. It is set. Here, the arrangement position is set so that the electric hoists 4 face each other across the slab 103.

Further, the electric hoist 4 is suspended and attached to the horizontal portion 52 of the suspension chain mount 5, and as shown in FIG. 3, the tip end portion of the load chain 41 of the electric hoist 4 faces the above-mentioned frame body 21. It is connected to the second support point P2. Therefore, the upper end portion of the suspension chain 31 is fixed to the horizontal portion 52 of the suspension chain pedestal 5 to which the electric hoist 4 is not attached, and the lower end portion thereof is fixed to the opposite second support point P2. That is, the load chain 41 is connected to a part of the second support points P2, and the suspension chain 31 is fixed to the remaining second support points P2.

Such electric hoists 4 are grouped, and a plurality of grouped electric hoists 4 can be started at the same time. That is, in this embodiment, a plurality of electric hoists 4 for raising and lowering one suspension scaffold 2 (for example, four in this embodiment) are grouped together, and the plurality of electric hoists 4 are used as one remote controller. It is possible to control at the same time with 42. Specifically, in a short-range wireless system, one remote controller 42 and four electric hoists 4 are grouped so that a control signal can be simultaneously transmitted from one remote controller 42 to four electric hoists 4. It has become. The remote controller 42 can also individually start and control each electric hoist 4.

With such an electric hoist 4, the suspended scaffold 2 is arranged at the first height during work, and the suspended scaffold 2 is placed at a second height closer to the slab 103 side than the first height at a predetermined time other than during work. It can be arranged in a scaffold. That is, by lowering the suspension scaffold 2 with the electric hoist 4 before the work, the height of the suspension scaffold 2 becomes the first height as shown in FIGS. 1 and 3, and the suspension scaffold 2 becomes the height as described above. Workers will be able to get on board and work properly. Here, the electric hoist 4 is provided with a lower limit limiter so that when the suspended scaffold 2 reaches the first height, it cannot descend any further. At this time, the chains 31 and 32 are also stretched and appropriate. Supports the hanging scaffold 2.

Further, for example, by raising the suspension scaffold 2 with the electric hoist 4 after the work of one day is completed (at a predetermined time), the suspension scaffold 2 is raised from the first height as shown in FIGS. 8 and 9. It is arranged at a second height closer to the slab 103 side, that is, at a height farther from the water surface. Here, the second height is closer to the lower surface of the slab 103, and is a height that can prevent and suppress damage to the suspended scaffold 2 due to the effects of high tides, waves, strong winds, etc. even if the sea conditions are rough. be. Further, the electric hoist 4 is provided with an upper limit limiter so that when the suspended scaffold 2 reaches the second height, it does not rise any further and does not hit the slab 103. At this time, the chains 31 and 32 are loosened. It will be in a state.

Next, an operation method (suspension scaffold operation method) of the suspension scaffold facility 1 having such a configuration will be described.

First, when an operator rides on the suspended scaffold 2 to perform the work, as described above, the four electric hoists 4 are simultaneously lowered and activated by one remote controller 42 to raise the suspended scaffold 2 to the first height. Let it descend. After performing such a descent operation on all the suspended scaffolds 2, operations such as construction and inspection are performed on the suspended scaffolds 2.

Further, for example, when the work is interrupted after the work of the day is completed, the work is interrupted due to the rough sea, or when stormy weather is predicted (at a predetermined time), one remote controller 42 can be used for four electric hoists 4. At the same time, the suspension scaffold 2 is raised to a second height close to the slab 103 side. Such an ascending operation is performed on all the suspended scaffolds 2. Then, when the work is started again, the suspended scaffold 2 is lowered to the first height in the same manner.

According to the suspended scaffolding equipment 1 and the suspended scaffolding operation method having such a configuration, the suspended scaffolding 2 is set to a second height closer to the slab 103 side than the first height by the electric hoist 4 at a predetermined time other than the working time. That is, it can be arranged at a height farther from the water surface. For this reason, for example, by arranging the suspended scaffolding 2 at a second height near the slab 103 side after the work of the day is completed (at a predetermined time), the sea elephant may be roughened by stormy weather such as a typhoon. However, it is possible to prevent or suppress the damage of the suspended scaffold 2 due to the influence of high tide, waves, strong wind, etc. without removing the suspended scaffold 2. As a result, it is possible to reduce the labor, time, and cost required for the restoration.

Further, when the suspended scaffold 2 is at the first height, that is, when the worker rides on the suspended scaffold 2 to perform the work, the suspended scaffold 2 is supported by the chains 31 and 32, so that the suspended scaffold 2 is supported on the suspended scaffold 2. It is possible to work stably.

Further, since the suspended scaffold 2 is composed of the expanding panel 22 having many holes, the water pressure received by the suspended scaffold 2 from seawater or the like is relaxed, and it is possible to further prevent or suppress the damage of the suspended scaffold 2. Will be. Further, since the suspended scaffold 2 is configured by the expand panel 22, the weight of the suspended scaffold 2 can be reduced, and the electric hoist 4 for raising and lowering the suspended scaffold 2 is simplified and reduced in weight (lightening capacity). ) Is possible.

Further, since a plurality of electric hoists 4 can be started at the same time, the suspension scaffold 2 can be raised and lowered at the same time by the plurality of electric hoists 4, and the suspension scaffold 2 can be raised and lowered appropriately (parallel) without bias. It will be possible. Moreover, since a plurality of electric hoists 4 can be activated and controlled by one remote controller 42, the number of personnel required to operate the electric hoists 4 can be reduced.

Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above-described embodiment, and even if there is a design change or the like within a range that does not deviate from the gist of the present invention. Included in the invention. For example, in the above embodiment, the case where the water area is the sea area W has been described, but the water area may be a river or the like, and the case where the structure is the pier 101 has been described, but it is another structure. May be good. Further, although a plurality of electric hoists 4 are grouped so that they can be activated simultaneously by one remote controller 42, a plurality of operators each hold one remote controller 42 of the electric hoist 4 and give a signal of a signaler. A plurality of electric hoists 4 may be started at the same time according to the guidance.

1 Suspended scaffolding equipment 2 Suspended scaffolding 21 Frame 22 Expanded panel (perforated plate)
31 Suspended chain (supporting means)
32 Anti-sway chain (supporting means)
4 Electric hoist (elevating means)
42 Remote control 5 Suspended chain stand 101 Pier (construction)
102 Dolphin 103 Slab 104 Intermediate pillar W Sea area (water area)

Claims (6)

Suspended scaffolding suspended from a structure installed above the body of water and disposed below the structure,
Ascending / descending means for raising / lowering the suspended scaffolding,
When the worker rides on the suspended scaffold to perform the work, the suspended scaffold can be arranged at the first height by the elevating means, and the elevating means can be used at a predetermined time other than the work. The suspended scaffold can be arranged at a second height closer to the structure side than the first height.
Suspended scaffolding equipment characterized by that. A support means for supporting the suspended scaffold when the suspended scaffold is at the first height is provided.
The suspended scaffolding equipment according to claim 1. The suspended scaffold is made of a perforated plate having a larger hole occupancy than the non-hole part.
The suspended scaffolding equipment according to any one of claims 1 or 2. A plurality of the elevating means are provided, and the plurality of elevating means can be activated at the same time.
The suspended scaffolding equipment according to any one of claims 1 to 3, characterized in that. The suspended scaffolding that is arranged below the structure installed above the water area and can be raised and lowered is arranged at the first height when the worker rides on the suspended scaffolding and performs the work, except during the work. At a predetermined time, it is arranged at a second height closer to the structure side than the first height.
A method of operating a suspended scaffold that is characterized by this. When a plurality of elevating means for raising and lowering the suspended scaffold are provided, the plurality of elevating means are activated at the same time.
The suspended scaffolding operation method according to claim 5, wherein the scaffolding is operated.

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