JPH0729138Y2 - Scaffold for dismantling tower-like structures - Google Patents

Description

[Detailed Description of the Invention] << Industrial Application Field >> The present invention relates to a scaffold for dismantling a tower-like structure, and more particularly to a scaffold for dismantling a tower-like structure that enables safe and economical dismantling work. is there.

<< Prior Art >> As a technique for dismantling a tower-like structure such as a chimney, various means have been developed in the past, for example, as shown in FIG.

That is, as shown in FIG. 5 (A), a band 3 is wound from the ground 1 to an upper outer peripheral surface of a tower-shaped structure (eg, a chimney 2), and the work scaffold 4 is fixed by a frictional force due to the tightening of the band 3. A reaction force is generated, and at least two bands 3 are used to rearrange the reaction force and gradually raise the work platform 4. Then, while dismantling the chimney 2 from above, the working scaffold 4 is gradually lowered while using at least two bands 3 in the same manner as described above to rebalance the reaction force.
The work scaffold 4 is integrally formed in a substantially planar donut shape having an inner diameter slightly larger than the outer circumference of the chimney 2 and is vertically movable integrally.

Also, instead of the reaction force of the band 3 described above, FIG.
As shown in FIG. 2, there is also one in which a hook 5 is attached to the upper end edge of the chimney 2 and the above-mentioned work scaffold 4 having a substantially donut shape in a plane is connected to the hook 5 via a wire 6. In this example, the lifting device 7 is arranged in the middle of the wire 6, and the lifting device 7 is operated to vertically move the work scaffold 4.

<Problems to be Solved by the Invention> However, in the above-mentioned conventional means, the reaction force for fixing and raising the work scaffold 4 depends on the frictional force due to the tightening of the band 3, and therefore the band 3 should be equipped accordingly. It is necessary to increase the equipment cost of band 3.

Further, the worker who is on the work scaffold 4 must raise and lower the work scaffold 4, and there is a risk of falling.

Further, since the working scaffold 4 is raised and lowered while changing the reaction force, there are various problems such as a longer construction period.

Further, even when the work scaffold 4 is attached to the chimney 2 via the hook 5, the person who operates the elevating device 7 must also move up and down while riding on the work scaffold 4, and the same problem as described above occurs. Had.

The present invention has been made in view of the above points, and its purpose is to perform a tower structure dismantling work capable of performing dismantling work while satisfying all of safety, economic efficiency, construction period, and the like. To provide a foothold.

<Means for Solving the Problem> In order to achieve the above object, the present invention is a work scaffold for disassembling the tower-shaped structure, which is provided along the outer periphery of the tower-shaped structure, Work in which the work scaffolding is composed of a plurality of scaffolding units, the scaffolding units are independently movable up and down, and the movement of the scaffolding unit is moved to another scaffolding unit in a stationary state. Member,
Alternatively, it is characterized in that it can be performed by the operation of a worker in another place.

Further, preferably, the scaffold for dismantling a tower-like structure according to the present invention (hereinafter referred to as scaffold) is provided at least in the vicinity of the work floor on the tower-like structure side of each scaffolding unit of each of the plurality of units. A sliding plate in contact with the outer periphery of the tower-like structure, a pulley provided on the scaffolding unit component near the sliding plate installation location, and a circumferential direction of all scaffolding units through the pulleys of all scaffolding units. The scaffold tightening device for the outer peripheral side of the tower-shaped structure, which comprises a rope provided in the above, is provided.

<Operation> In the scaffold for dismantling a tower-like structure according to the present invention, the scaffolding for dismantling work is composed of a plurality of scaffolding units, and each scaffolding unit can be independently moved up and down by remote control. it can.

Therefore, when the dismantling work progresses and the work scaffolding is lowered, a worker riding on one scaffolding unit lowers another scaffolding unit by a predetermined amount by remote control (at this time,
Multiple or all scaffolding units may be lowered).

Next, the worker moves onto the scaffolding unit that was lowered in the previous step, and further descends other scaffolding units (including those used in the previous step). In this way, the scaffolding unit is sequentially moved down.

At this time, since the worker is operating remotely, it is safe because no person needs to be on the scaffolding unit during movement.

Further, in order to ensure safety, the present invention uses a scaffolding tightening device, the sliding plate of this device is brought into contact with the outer peripheral surface of the tower-shaped structure, and is installed in the circumferential direction of all scaffolding units via pulleys. All the scaffolding units may be fixed to the outer peripheral surface of the tower-like structure by tightening the ropes.

<Example> Hereinafter, a preferred example of a scaffold for dismantling a tower-like structure according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a basic configuration diagram showing an embodiment of the present invention.
As shown in the figure, a lifting reaction force member 31 is detachably attached to the upper edge of a tower-like structure (eg, a chimney) T.
A work scaffold 16 is suspended via a wire 33 whose upper end is connected to the outer end of 31. An elevating device 32 is arranged in the middle of the wire 33.

Here, in the present invention, the work scaffold 16 is composed of scaffold units 16a, b, c ...

Next, each part will be described in detail with reference to FIG. 2. In the present embodiment, the working scaffold according to the present invention has three scaffolding units 16.
It is divided into a to c. Then, if these three scaffolding units 16a to 16c are connected, the tower structure T
The scaffolding is a box-shaped body having a generally donut-shaped cross section and a substantially rectangular vertical cross-section along the outer circumference.

Further, these three scaffolding units 16a to 16c have work floors 20a to 20c at substantially the center in the vertical direction.
An outer hanging point 21 is provided near both ends of the tower structure T side, and an inner hanging point 22 is provided inside from the outer hanging point 21 along the tower structure T side of the work floor.

Further, an elevating device mounting point 24 is provided below the work floor approximately at the center of the line connecting the outer suspension point 21 and the inner suspension point 22 along the tower-like structure side of the work floor.

Then, the above-mentioned inner and outer suspension points (the outer suspension points in FIG. 2)
21) is shown so that it can be connected to the first fixed reaction force member 12a provided on the top of the tower-shaped structure T in the process of being disassembled via the suspending member 14 and the turnbuckle 26.

Here, the first fixed reaction force member 12a has a hook-shaped structure having a substantially U-shaped cross section that is hung from the outer side to the inner side of the structure T at the top of the tower-shaped structure T. Then, the upper side of the tower-like structure T is made to slide, for example, so that its length can be adjusted according to the change in the wall thickness of the tower-like structure T, and the fixed reaction force member and the connecting member 30 are provided to face each other to prevent falling. Connected.

As the suspending member 14, for example, a wire rope or a chain can be used.

On the other hand, the lifting device attachment point 24 can be connected to the lifting reaction force member 31 provided on the top of the tower-like structure T in the process of disassembly via the lifting device 32 and the wire 33.

The lifting reaction force member 31 is the first fixed reaction force member 12 described above.
It has a structure similar to that of a. As the lifting device 32, a winder for gondola, a motor block, a hydraulic chill hole, a motor winch, etc. are used for remote operation, and a worker rides on a scaffolding unit to be lifted and operated. When doing so, a lever block, a chain block, a manual winch or the like is used.

Furthermore, the scaffolding units 16a to 16c can be connected by a rope 34 to prevent them from falling. The gap l between the scaffold units 16a to 16c can follow the change in the diameter of the conical tower structure when the scaffold of this example is moved up and down along the outer circumference of the conical tower structure. Is done.

In addition, the scaffold of this example is provided with scaffold tightening devices R for stabilizing the scaffold and the like at two places, near the work floors 20a to 20c and the lower part of each unit.

An embodiment of the scaffold tightening device R will be described with reference to FIG.

In the figure, reference numeral 36 denotes a sliding plate that is in contact with the outer periphery of the tower-shaped structure T, and scaffolding units 16a to 16c near the sliding plate 36.
A shaft 38 is erected on the upper surface of the components (work floors 20a to 20c in this example), and a pulley 39 is pivotally attached to the shaft 38.

A rope 40 is provided in the circumferential direction of all the scaffolding units 16a to 16c via the pulley 39. In this embodiment, in order to prevent the rope 40 from coming off the pulley 39,
A guide plate 42 having a generally U-shaped cross section is provided so as to face the pulley 39.

Next, a work procedure for disassembling the tower-shaped structure T using the scaffold of this example will be described with reference to FIGS. 4 (A) to 4 (J).

First, as shown in FIG. 4 (A), the scaffold shown in FIGS. 1 and 2 is assembled on the ground around the tower-like structure (chimney in this example) T to be dismantled, and ascends and descends to the top of the chimney T. A reaction material 31 is provided.

Then, the lifting device attachment points 24 of the scaffold units 16a to 16c and the lifting reaction force member 31 are connected via the lifting device 32 and the wire 33 (see FIGS. 3B and 3G).

After connection, first, a worker who rides on the work floor 20a of the scaffolding unit 16a moves the other scaffolding unit 16b to a certain height (from the work floor 20a of the scaffolding unit 16a to the work floor 20b of the scaffolding unit 16b. High enough to move safely, here 0.5
m)) and raise it by remote control. Next, a worker who has transferred from the work floor 20a to the work floor 20b moves the scaffolding unit 16a to a certain height (from the work floor 20b to the work floor 20a.
Height that can be safely transferred to, that is, 0.5 × 2 = 1
up to m) by remote control.

In addition, in order to safely transfer from the work floor 20a to the work floor 20b, a ladder, a bridge, or other appropriate means that can be easily attached and detached between the scaffolding unit 16a and the scaffolding unit 16b can be used.

Then, by repeating this operation, as shown in FIG. 4 (B),
The scaffolding unit 16b is raised to the top, and then the worker who has transferred to the work floor 20b raises the scaffolding unit 16a to the same height as the scaffolding unit 16b.

Thereafter, the operator remotely operates the work floor 20a or 20b to raise the scaffolding unit 16c from the ground all at once, and position the scaffolding units 16a to 16c at the same height as shown in FIG. 4 (C). .

Next, install the first fixed reaction material 12a on the top of the chimney T,
The first fixed reaction material 12a and the outer suspension points 21 of the scaffolding units 16a to 16c are connected to each other via the suspension material 14 and the turnbuckle 26, and the ropes for preventing the fall between the scaffolding units 16a to 16c. Connect with 34 (see FIG. 4 (C) and FIGS. 2 (B), (C)). After this, the rope 40 of the scaffolding tightening device R shown in FIG. 3 provided at two places near the work floors 20a-b and each part of each scaffolding unit 16a-c is tightened, and each scaffolding unit 16a-c is attached to the chimney. It is fixed to the outer periphery of T via a sliding plate 36. Then, the lifting reaction force member 31 and the wire 33 are removed.

To each scaffolding unit 16a to 16c, a sheet or the like (S in FIG. 2A) is attached to the outer periphery of each scaffolding unit 16a to 16c at the time of assembling the scaffolding on the ground in FIG. 4A. It is preferable to perform soundproof and dustproof processing. And FIG. 4 (C)
In this state, it is desirable to install a sheet or the like between the scaffolding units 16a to 16c and also on the roof portion to complete the soundproof and dustproof treatment.

Then, as shown in FIG. 4 (D), the working floors 20a to 20c
The chimney T is dismantled to the required height (for example, about 1 m) except for the worker who rides on it and the place where the first fixed reaction force member 12a is installed (for example, the chimney is crushed, and the debris is cut into the chimney. T drop inside).

Then, as shown in FIG. 4 (E), a second fixed reaction force member 12b different from the first fixed reaction force member 12a is provided on the top of the portion disassembled in the above step, The fixed reaction force member 12b is connected to the inner hanging point 22 via the hanging member 14. After that, the turnbuckle 26 provided on the suspending member 14 attached to the first fixed reaction force member 12a is loosened, and the load of each scaffolding unit 16a to 16c is rearranged to the above inner suspending point 22 and then the first The fixed reaction force member 12a and the hanging member 14 of are removed.

In this state, as shown in FIG. 4 (F), the portion which was previously disassembled and left is disassembled in the same manner as above.

As mentioned above, each scaffolding unit is first attached to the outer hanging point 21.
It is not limited to the order of disassembling by applying the loads of 16a to 16c, then performing the load reshaping of each scaffolding unit 16a to 16c at the inner suspension point 22 and disassembling the remaining portion, and the order may be reversed.

After the dismantling of the first stage is completed as described above, the fourth stage
As shown in FIG. (G), a lifting reaction force member 31 is provided on the top of the disassembled portion, and the lifting reaction force member 31 and each scaffold unit 16a.
..- c are connected to the lifting device attachment point 24 via the lifting device 32 and the wire 33, and the lifting device 32 is slightly actuated to such an extent that the suspending member 14 of the second fixed reaction force member 12b is loosened, and each scaffold unit 16a.
The load of ~ c is changed to the lifting device attachment point 24 and the second
The fixed reaction force member 12b and the hanging member 14 of are removed. At the same time, the first fixed reaction force member 12a is provided, and the first fixed reaction force member 12a and the outer hanging point 21 are connected to the hanging member 14 and the turnbuckle 2.
Connect via 6. At this time, the hanging material 14 is in a slackened state.

Then, the rope 40 of the scaffold tightening device R is unwound, and the scaffold units 16a to 16c are unfixed from the outer peripheral surface of the chimney T.

In this state, first, as shown in FIG. 4 (H), for example, an operator who rides on the work floor 20b of the scaffolding unit 16b moves another scaffolding unit 16a to a certain height (such as a seat for soundproofing and dustproofing). The height of each scaffolding unit 16a to 16c can be lowered without removing it, and is lowered by remote control to several cm to several tens of cm, for example. Next, the worker transfers from the work floor 20b to another work floor 20c, and as shown in FIG. 3 (I), the scaffolding unit 16a, which the worker had moved to in the previous process, is first lowered to the scaffolding unit 16a. Lower to the same height. Furthermore,
Workers are already down from work floor 20c Scaffolding unit 1
Transfer to 6a (or 16b) work floor 20a (or 20b),
As described above, the descending height of the scaffolding unit 16a is several cm to several 1
Since it is about 0 cm, you can safely transfer without using the ladder etc. (of course you can use it). Then, the scaffolding unit 16c is lowered to the same height as the previously lowered scaffolding units 16a and 16b, as shown in FIG. 4 (J).

By repeating the above operation, each of the scaffold units 16a to 16c is lowered to a predetermined height, that is, until the suspension member 14 is tensioned and the load of each of the scaffold units 16a to 16c moves to the outer suspension point 21.

Then, the disassembly of the second stage is performed in the same manner as the first stage. When the dismantling of the second stage is completed, the scaffolding units 16a to 16c are again lowered to the predetermined height as described above, and the dismantling of the third stage is performed. By repeating this operation, the entire chimney T is disassembled.

It should be noted that, in the present invention, the number of units (for example, the scaffolding unit 16c) is not limited to the one unit lowering as described above.
Scaffolding unit 16a and scaffolding unit 16 on the working floor 20c of
b) can be lowered simultaneously.

Also, if permitted by the Labor Standards Inspection Office, all scaffolding units 16a-c may be lowered simultaneously on any of the work floors 20a-c of the scaffolding units 16a-c.

Furthermore, when it is not necessary to remove or restore the joints with adjacent scaffolding units such as seats for soundproofing and dustproof, it is not necessary to gradually lower each scaffolding unit, so each scaffolding unit should be moved once. It is also possible to lower all at once to a predetermined height by operating. However, the worker should be able to safely transfer from the work floor of the scaffolding unit to be finally lowered to the work floor of the scaffolding unit that has already been lowered by using a ladder or the like. Also, even if it is necessary to remove or restore the joints with adjacent scaffolding units such as seats for soundproofing and dustproof, it will take more work, but each unit will be lowered to the predetermined height at once by one operation. Of course, it's good.

Further, when the descent of one scaffolding unit is completed, the load of the scaffolding unit is transferred to the outer suspension point as described above, so that the elevating device, the elevating reaction force member, and the wire are unnecessary. Therefore, the elevating device, the elevating reaction force material, and the wire for one scaffolding unit may be prepared and used for each scaffolding unit to perform the above descending operation.

Although the above description has been made on the case where the scaffolding unit is divided into three scaffolding units, the present invention is not limited to this, and it goes without saying that the scaffolding unit may be divided into two or four or more scaffolding units. However, even if the number is too large, the work such as transfer becomes complicated, and thus it is appropriately determined.

Also, the size of one unit depends on the capacity of the lifting device,
It is appropriately selected depending on how to take reaction force when fixing and lifting.

<< Effect of Device >> As described above in detail, the dismantling work using the scaffold according to the present invention has the following effects as compared with the conventional dismantling method.

(1) Since the reaction force for fixing and lifting the scaffolding unit is performed by the reaction force material and suspension material provided on the top of the tower-like structure in the process of dismantling, the equipment cost for fixing and lifting the unit is low. .

(2) Since the units are lifted and lowered by remote control on the work floor of units other than the unit to be lifted and lowered, there is no risk of a worker falling from the unit being lifted and it is safe.

(3) Installation of a device for raising and lowering the unit is extremely easy, and the raising and lowering operation of the unit can be performed in a short time.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram showing an embodiment according to the present invention, and FIG.
Figures (A) to (C) are views showing an embodiment of the scaffold according to the present invention. Fig. 2 (A) is a plan view and Fig. 2 (B) is I-I in Fig. 2 (A). A line sectional view, FIG. 2 (C) is a development view, and a third view
FIG. 4 is a diagram showing an embodiment of a scaffolding tightening device used for a scaffold according to the present invention, and FIGS. 4 (A) to (J) are procedures for disassembling a tower-like structure using the scaffold according to the present invention. FIG. 5 is a view showing a conventional dismantling method of a tower-shaped structure. T: Tower structure 16a, b, c: Scaffolding unit 24: Lifting device attachment point 31: Lifting reaction material, 32: Lifting device 33: Wire, 36: Sliding plate 39: Pulley, 40 ... rope

Claims (2)

[Scope of utility model registration request] 1. A work scaffold provided along an outer periphery of a tower-like structure for disassembling the tower-like structure, the work scaffold being composed of scaffolding units divided into a plurality of parts. Each of the scaffolding units is independently movable up and down, and the movement of the scaffolding unit can be performed by an operation of a worker who has moved to another scaffolding unit in a stationary state or an operator in another place. A scaffold for dismantling a tower-like structure characterized by the above. 2. A sliding plate which is provided at least in the vicinity of the working floor on the tower-like structure side of each scaffolding unit and is in contact with the outer periphery of the tower-like structure, and a scaffolding unit near the place where the sliding plate is installed. A scaffold fastening device for the outer peripheral side of the tower-shaped structure, which comprises a pulley provided in the component material and a rope provided in the circumferential direction of all scaffold units via the pulley of all scaffold units. The scaffold for dismantling a tower-like structure according to claim 1.