JP2003343103A - Method for removing dustproof membrane - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for removing a dustproof membrane capable of effectively preventing secondary pollution while removal cost from a skeleton frame body is lowered. <P>SOLUTION: The method for removing the dustproof membrane 40 is employed for removing, after completion of dismantling, the dustproof membrane 40 stretched on the skeleton frame body 20 covering object equipment X to be dismantled when the object equipment X is dismantled. A floor sheet is spread all over a floor within the frame body 20 in advance (floor sheet spreading process P1), the membrane 40 is suspended and lowered successively (dustproof membrane suspending-and-lowering process P3) while air within the membrane 40 is being sucked and the sucked air is being cleaned (polluted air sucking process P2), and then the membrane 40 stacked on the floor sheet 60 is folded in a state of being wrapped in the floor sheet 60 (dustproof membrane folding process P4). <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing a dustproof film, which removes a dustproof film provided so as to cover various facilities in order to prevent dust from scattering when the facilities are removed. .

[0002]

2. Description of the Related Art Conventionally, in order to prevent scattering of dust when dismantling a hazardous substance treatment facility such as a waste treatment plant or a wastewater treatment plant that treats an object containing a hazardous substance, the hazardous substance treatment facility has been used. Is generally covered with a dustproof film. Since such a dustproof film is in a state in which a large amount of dust containing harmful substances scattered during the removal work of the hazardous substance treatment facility is adhered, if it is removed carelessly when the removal work is completed, this dustproof film Dust is re-scattered and harmful substances are diffused into the atmosphere, which may cause secondary pollution.

In order to eliminate such inconvenience, conventionally, a method of removing the dustproof film 100 as shown in FIG. 6 has been adopted. This removal method includes a cleaning process Q1 for cleaning the inner surface of the dustproof film 100, a film removal process Q2 for removing the dustproof film 100 cleaned in the cleaning process Q1, and a dustproof film 100 removed in the film removal process Q2. It comprises a film cutting step Q3 for finely cutting.

In the cleaning step Q1, the dust-proof film 100 stretched over the frame structure 101 covering the harmful substance treatment facility (not shown because it has been removed in FIG. 6).
The cleaning water is jetted and supplied toward the inner surface of the dustproof film 100, whereby the dust containing harmful substances attached to the inner surface of the dustproof film 100 is washed off.

The film removing step Q2 is a film suspending step Q2.
21 and the film cutting step Q22, and the dustproof film 100
Is removed from the frame body 101 through any of the steps. Incidentally, when the film suspending process Q21 is selected, the dustproof film 100 is unlocked from the frame 101 in a state where the proper position of the dustproof film 100 is supported by the suspension rope 103 in advance. The dust-proof film 100 is folded and removed from the framework frame 101 by lowering the suspension rope 103. On the other hand, when the film cutting step Q22 is selected, the dust-proof film 100 is roughly cut with the cutting jig 104 such as scissors while being stretched on the skeleton frame body 101. Removed from body 101.

In the film cutting step Q3, the dustproof film 100 removed from the frame framework 101 in the film removing step Q2 is finely cut by a predetermined cutting device 105 brought into the frame framework 101. It The dustproof film 100 that has been finely cut is carried out of the skeleton frame body 101, whereby a series of removal work of the dustproof film 100 is completed.

[0007]

In the conventional method of removing the dustproof film 100 as described above, the washing water used for washing in the washing step Q1 is the dustproof film 10 first.
Since the polluted water containing the harmful substances attached to 0 is discharged onto the floor in the framework 101, the polluted water is treated by the wastewater treatment facility temporarily installed in the framework 101. Alternatively, it is necessary to take measures such as outsourcing to the outside of the system to carry out a predetermined wastewater treatment facility, which raises a problem of increasing the cost.

Further, when removing the dustproof film 100 from the skeleton frame body 101 in the film removing step Q2, dust or foreign matter containing harmful substances remaining on the dustproof film 100 even though it has been washed in advance. However, there is also a problem in that the above may scatter in the next film cutting step Q3, which may cause secondary contamination.

The present invention has been made to solve the above-mentioned problems, and a dustproof film capable of effectively preventing the occurrence of secondary pollution while ensuring the reduction of the removal cost. The purpose is to provide a removal method.

[0010]

The invention according to claim 1 is
A method of removing a dustproof film that is stretched over the frame framework so as to cover the target equipment during the dismantling work after the dismantling work is completed. The body is spread, the dustproof film is successively hung while sucking air in the dustproof film, and then the dustproof film in a state of being stacked on the sheet body is wrapped by the sheet body and folded. .

According to the present invention, the dustproof film hung from the frame is a sheet spread on the floor in a state where the air adhered to the inner surface of the dustproof film is cleaned and the dust adhered to the inner surface does not scatter to the outside. Since it is stacked on the body and folded so that it is wrapped in the sheet body in this state,
The dust adhering to the inner surface of the dust-proof film is reliably prevented from scattering to the outside during these operations, and thereby, environmental pollution due to the scattering accompanied by the dust of harmful substances can be effectively prevented.

Further, since it is possible to remove the dustproof film without pre-cleaning the inner surface of the dustproof film or cutting the dustproof film removed from the frame as has been conventionally done, the removal cost can be reduced accordingly. It can contribute to the reduction.

Incidentally, the dust-proof film folded together with the sheet body is transferred to a dedicated harmful substance treatment facility and subjected to appropriate detoxification treatment in the harmful substance treatment facility.

The invention according to claim 2 is the invention according to claim 1 or 2.
In the invention described above, the bottom edge portion of the dust-proof film having the opened lower end surface and the peripheral portion of the sheet body are joined to each other to form a bag.

According to the present invention, since the lower edge portion of the dustproof film and the peripheral portion of the sheet body are joined to each other to close the gap between them, dust is surely leaked from this portion. To be prevented.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the described invention, the suction air is subjected to a cleaning treatment by diverting a predetermined dust collector used during the disassembling work.

According to the present invention, since the cleaning of the air in the dustproof film is performed by diverting the dust collector used at the time of the dismantling work, equipment for newly cleaning the contaminated air is additionally provided. It is not necessary to provide the above, which contributes to the reduction of equipment cost.

According to a fourth aspect of the invention, in the invention according to any one of the first to third aspects, the dustproof membrane is provided with a frame for supporting a membrane on a ceiling portion thereof, and the dustproof membrane is suspended. The unloading process is characterized in that the frame is hung in a suspended state.

According to the present invention, the presence of the frame makes it possible to easily hang the dustproof film in a state where the ceiling portion maintains the same height level, so that the hanging operation can be performed in an orderly manner. . Therefore, if a frame is not used, many hanging ropes must be used to maintain the same height level of the ceiling, and the hanging work becomes complicated and smooth. Although such an inconvenience arises, this inconvenience is eliminated by adopting the frame body.

Further, the invention according to any one of claims 1 to 4 does not exclude that the inner surface of the dustproof film is washed, and the inner surface of the dustproof film is washed before folding the dustproof film. You may do so (Claim 5). By doing so, it becomes possible to perform the removal treatment of the dustproof film in a state in which the scattering of harmful substances to the outside is further reliably suppressed. In particular, less dust is generated when the dustproof film is folded.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Prior to describing the method for removing a dustproof film according to the present invention, a dismantling process of equipment containing harmful substances will be described. FIG. 1 is a partially cutaway perspective view showing an embodiment of a dustproof temporary building for dismantling work which is a target of the method for removing a dustproof film according to the present invention, and FIG.
It is a line sectional view. Note that FIG. 2 shows a state in which the dismantling target facility X (indicated by a chain double-dashed line) is removed and the floor sheet 60 is laid.

As shown in these figures, the dustproof temporary building 10 constructed during the dismantling work is used to cover the dismantling target equipment X when the dismantling target equipment X is dismantled. A frame 20 that is constructed so as to surround the equipment X to be dismantled, an exterior body 30 that is constructed so as to further surround the frame 20, and a dust proof that is stretched on the inner surface side of the frame 20. It is composed of a membrane 40 and a dustproof membrane 40 for adjusting the pressure in the framework frame 20 to a negative pressure so that the dust generated by the disassembling process in the framework framework 20 is prevented from leaking from the framework frame 20. It has a basic configuration.

The equipment X to be dismantled includes refuse incineration equipment, wastewater treatment equipment, large dust collectors, desulfurization equipment,
Examples include pollution control equipment such as denitration equipment.

In the present embodiment, the framework frame 20 is a so-called structurally strong so-called truss in which a large number of pipe-shaped unit rods 21 are assembled via a spherical joint 22 so as to form many triangles. The structure is adopted and built. The framework frame 20 is not limited to the truss structure, and various framework structures can be adopted. Such frame framework 20
Is a concrete foundation 1 that follows the shape of the facility X to be demolished in plan view, which has been pre-constructed on the site around the facility X to be demolished.
It is formed by assembling the unit rod 21 on top of 1 through the spherical joint 22.

As shown in FIG. 2, the dust-proof film 40 is stretched around the inner peripheral surface of the frame 20 by using an unillustrated locking member such as a rope. And a ceiling film 42 laid on the ceiling portion of the frame body 20. Among the peripheral membrane 41 and the ceiling membrane 42, especially the ceiling membrane 4
2 is attached to the ceiling portion on the inner surface side of the skeleton frame body 20 via a flat plate-shaped frame body 43 formed by vertically and horizontally assembling the pipe body. The flat frame 43
Is locked to the upper surface side of the ceiling membrane 42, so that it can be easily removed from the dustproof membrane 40 after the hanging operation of the dustproof membrane 40 described later is completed.

In the present embodiment, the dustproof film 40 is made of a thin woven product obtained by weaving fibers made of chlorine-free synthetic resin such as polyethylene and polypropylene.

When the dismantling work in the dustproof temporary building 10 is completed, a large amount of dust containing harmful substances adheres to the surface of the dustproof film 40, so that the contaminated dustproof film 40 is removed. It cannot be reused and is normally disposed of. Therefore, since a new dustproof film 40 is used every time the dismantling work is performed, it is desirable that the dustproof film 40, which is such a consumable item, be low in cost in order to reduce the cost of the dismantling work. In this respect, polyethylene, polypropylene and the like are inexpensive and therefore advantageous as the material of the dustproof film 40. Further, since olefinic hydrocarbons such as polyethylene and polypropylene do not contain chlorine, no harmful substances such as dioxins are generated even when subjected to incineration treatment, and the material of the dustproof film 40 to be finally incinerated. Is also suitable as

The dustproof film 40 can be made of an inexpensive and lightweight product because the dustproof temporary building 10 is provided with the exterior body 30 on the outer surface side of the frame 20. That is, since the skeleton frame body 20 is covered by the exterior body 30, the skeleton frame body 20 is not directly affected by weather conditions such as wind and rain and solar radiation, and thus the dustproof film 40 can be a thin and lightweight product. Of.

Then, the dustproof film 40 (which has been formed wide in advance by a heat-welding process at the manufacturing factory of the dustproof film 40) is stretched over the frame 20 and the adjacent dustproof film 40.
The joint portions are connected to each other by a method as shown in FIG. 4, which will be described later, so that even if the inside of the dustproof film 40 has a negative pressure due to the driving of the suction blower 51, the short-circuit air into the dustproof film 40 can be prevented. Intrusion is surely prevented.

The exterior body 30 has an outer wall film 31 stretched further on the outer peripheral surface side of an outer frame composed of a number of unit rods 21 and spherical joints 22 on the outer side of the skeleton frame body 20, and a ceiling of the skeleton frame body 20. And a roof 32 that covers the upper part of the part.

In this embodiment, the outer wall film 31 is made of a thick olefin resin sheet such as polyethylene or polypropylene. Such a synthetic resin sheet is used because the outer wall film 31 is directly exposed to the outside air and is directly affected by weather conditions such as wind and rain and direct sunlight, and the dustproof film after the dismantling work is completed. Since it is reused instead of being disposed of like 40, a thick synthetic resin sheet such as polyethylene or polypropylene having excellent weather resistance and high strength is adopted so as to endure these.

The joint portions of the outer wall film 31 are joined to each other by heat welding using a joining film, direct hot air welding of the outer wall films 31 to each other, or adhesion with an adhesive, whereby the outer wall film 31 is formed. I try not to be disturbed by the strong wind. Furthermore, a plurality of gallans 33 for taking in the outside air are provided at appropriate places on the outer wall film 31, and the outside air is taken into the framework frame body 20 through the gap space 12 of the framework frame body 20 from the galan 33. There is.

The roof 32 is constructed by using a corrugated plate made of metal. The roof 32 is constructed as a so-called gable roof on the top of the frame 20 so that the central part is a watershed and a downward slope is formed toward the edge in the width direction, whereby the rainwater flows smoothly. To be done. The roof 32 is not limited to being made of metal, and a synthetic resin flat plate or corrugated sheet, or a lightweight roof material such as a tent film material can also be suitably used.

Furthermore, in a proper place on the outer wall surface of the outer casing 30,
As shown in FIG. 1, a building 34 for carrying in and out is constructed for carrying out the dismantled objects generated in the dismantling process of the dismantling target facility X and carrying in necessary equipment.

This loading / unloading building 34 has a building main body 35 having a gable roof, and a first door 36 for opening and closing an opening provided in the building main body 35 for communicating with the temporary dustproof building 10. The building main body 35 is provided with a second door 37 provided between the inside and the outside. At the time of carrying out the dismantled object, the first door 36 is opened and the dismantled object is once moved into the building main body 35, and then the first door 36 is closed and then the second door 37 is opened to carry out the dismantled object. The framework frame 2
The dust inside 0 does not leak directly to the outside. When carrying the equipment into the framework frame 20, contrary to the above, the second door 37 is opened and closed and then the first door 36 is opened and closed.

The pressure adjusting means 50 includes a suction blower 51 installed on the site outside the temporary dustproof building 10 and a suction duct 52 laid between the suction blower 51 and the dustproof film 40. The dust collecting filter 53 provided in the suction duct 52 is provided. Then, when the suction blower 51 is driven during the dismantling construction of the equipment X to be dismantled, the inside of the dustproof film 40 becomes a negative pressure due to the air being extracted through the suction duct 52, whereby the outside air is exposed to the galan 33 of the exterior body 30. , The clearance space 1 in the frame 20
It passes through the dust-proof film 40 and is introduced into the dust-proof film 40.

The dust generated by the dismantling process is removed by the dust collecting filter 53 provided in the suction duct 52, and clean air is discharged from the suction blower 51 to the outside.

The dustproof temporary building 1 constructed as described above
According to 0, the equipment X to be dismantled is in a state of being doubly surrounded by the dust-proof film 40 and the exterior body 30, and particularly the pressure adjusting means for preventing the leakage of dust inside the frame 20. The dust generated in the dustproof temporary building 10 during the dismantling process of the dismantling target facility X due to the synergistic effect of the double measure with the pressure regulation by 50,
Leakage from the dustproof temporary building 10 to the outside is effectively suppressed, and it is possible to reliably prevent the inconvenience that the surroundings of the dismantling construction site are contaminated with the leaked dust.

Further, the exterior body 30 is provided outside the frame body 20.
With the provision of, the inside of the dustproof film 40 is not directly affected by weather conditions such as wind and rain, and the dismantling work can always be performed in a stable state.

The pressure adjusting means 50 comprises a suction blower 51 for adjusting the negative pressure inside the framework frame 20, and a suction duct 5 connecting the suction blower 51 and the interior of the framework frame 20.
2 and the dust collection filter 53 provided in the suction duct 52, driving the suction blower 51 causes a negative pressure in the framework frame 20 and causes the outside air to be exposed to the outside air. As indicated by an arrow, the dust is sucked into the framework frame 20, and thereby dust generated during the dismantling work in the framework frame 20 can be reliably prevented from scattering to the outside.

Moreover, the air in the framework frame 20 sucked by the driving of the suction blower 51 is the dust collecting filter 5 provided in the suction duct 52 on the upstream side of the suction blower 51.
Since it is cleaned by 3 and then released to the outside, it is possible to reliably prevent the inconvenience that the dust generated in the dustproof film 40 is entrained in the suction air sucked by the suction blower 51 and scattered to the outside.

The method of removing the dustproof film according to the present invention is the same as the frame 20 in the temporary dustproof building 10 as described above.
The dustproof film 40 stretched on the inner surface side of is removed after the dismantling process of the dismantling target facility X is completed. FIG. 3 is a process drawing showing the first embodiment of the method for removing a dustproof film according to the present invention. As shown in this figure, the dustproof film 40
Is a floor sheet laying process P1, a contaminated air suction process P2, and a dust-proof film suspending process P3 that is executed simultaneously with the contaminated air suction process P2 in a state where the contaminated air suction process P2 is continued, and a dust-proof process. It is removed from the frame 20 by passing through the membrane folding step P4.

In the floor sheet laying step P1, the dustproof temporary building 1 is provided before the dustproof film 40 is removed.
A floor sheet (sheet body) 60 is laid on the floor F in 0. The floor sheet 60 is spread for the following reasons.

That is, when the equipment X to be dismantled is dismantled and carried out of the temporary dustproof building 10, the floor F surface in the temporary dustproof building 10 is not necessarily flat, and various equipment is removed. Since there are a lot of subsequent irregularities, when dust containing the harmful substances peeled off from the dustproof film 40 falls and accumulates on the floor F when the dustproof film 40 is removed, this dust is removed. Although an extra work must be performed on the floor sheet 60, in order to eliminate the extra work by receiving the falling dust by the floor sheet 60, and the suspended dust-proof film 40 is wrapped with the floor sheet 60, whereby the dust-proof film is provided. This is to prevent recurrence of dust when handling 40.

The floor sheet 60 is made of a material similar to that of the outer wall film 31 such as an olefin-based thick synthetic resin sheet such as polyethylene or polypropylene, which effectively prevents the permeation and scattering of dust captured. I am trying to do it.

Further, in the floor sheet laying step P1, the lower end portion (skirt portion) of the peripheral membrane 41 and the peripheral edge portion 61 of the floor sheet 60 are joined to each other, and the inside of the dustproof film 40 is made into a substantially sealed state. As a result, in the next step (polluted air suction step P2), driving of the suction blower 51 introduces a short circuit of outside air into the dustproof film 40 through the skirt of the peripheral membrane 41, and conversely leaks polluted air from the dustproof film 40. In addition, it is possible to prevent the inner surface side of the dustproof film 40 from being exposed to the outside air during the folding process of the dustproof film 40 in the subsequent dustproof film folding step P4.

4A and 4B are views showing an embodiment of a joint structure of the skirt portion of the dustproof film 40 and the peripheral edge portion of the floor sheet 60. FIG. 4A is a partially cutaway perspective view, and FIG. It is a longitudinal cross-sectional view of (a). As shown in FIG. 4, the joining structure 90 between the skirt portion of the dustproof film 40 and the peripheral edge portion of the floor sheet 60 is
A belt-shaped sheet 91 that is attached to the lower portion of the inner surface of the dustproof film 40 and covers the entire inner surface, and a rope 92 that is woven between the belt-shaped sheet 91 and the peripheral edge portion 61 of the floor sheet 60.
And a flap film 93 that covers the joint portion of the both from the inside.

The belt-shaped sheet 91 has its upper edge portion welded to the inner surface side of the dustproof film 40 over the entire length thereof, and has a plurality of eyelets 94 attached to the lower edge portion in a row at a predetermined pitch. On the other hand, a plurality of eyelets 94 are provided on the peripheral edge portion 61 of the floor sheet 60 so as to correspond to the eyelets 94 of the belt-shaped sheet 91.

Then, with the lower edge of the dustproof film 40 folded back inward, the peripheral edge 61 of the floor sheet 60.
Is opposed to the lower end edge of the belt-like sheet 91, and in this state, the rope 92 is inserted into each eyelet 94 of the belt-like sheet 91 and the peripheral edge portion 61 of the floor sheet 60 in a zigzag shape, whereby the dust-proof film 40 and the floor sheet. 60 and 60 are joined to each other via a belt-shaped sheet 91 and a rope 92.

The flap film 93 is for closing a laterally extending gap at a joint portion between the strip-shaped sheet 91 and the floor sheet 60, and has a laterally long upper flap film 93a and a lower flap film. And 93b.
A columnar winding portion 93c formed by winding the flap films 93a and 93b is provided at the connecting portion of the upper and lower flap films 93a and 93b. The wound portion 93c and the lower flap film 93
An adhesive tape 95 is laid between the tape and the tape b so that the winding portion 93c can retain its shape without being rewound.

The upper edge of the upper flap film 93a is welded to the dustproof film 40 and the lower flap film 93b while the wound portion 93c faces the gap between the strip-shaped sheet 91 and the peripheral edge portion 61 of the floor sheet 60. The lower edge of the sheet is welded to the floor sheet 60, so that the gap formed between the strip sheet 91 and the peripheral edge portion 61 of the floor sheet 60 is almost completely closed from the inside.

In the contaminated air suction step P2, the air in the dustproof film 40 is sucked and cleaned to prevent the dust floating in the dustproof film 40 from being released to the outside. ing. And in this process, the pressure adjusting means 50 used in the dismantling work of the dismantling target equipment X.
The air in the dustproof film 40 is sucked by driving the suction blower 51, and the sucked air is cleaned by the dust collecting filter 53 and discharged to the outside.

The dustproof film suspending step P3 is performed in the dustproof film 40.
While the air inside is being sucked (that is, the contaminated air suction step P2 is being continued), the dustproof film 40
Is the process of hanging. In order to execute the dustproof film suspending process P3, a winch 70 is temporarily installed on the site near the dustproof temporary building 10. The wire 72 drawn from the drum 71 of the winch 70 is connected to the flat plate-shaped frame body 43 via a predetermined number of pulleys 73 provided at appropriate places on the roof 32 of the dustproof temporary building 10.

After that, the perimeter membrane 41 is locked to the inner peripheral surface of the framework frame body 20, and the frame framework body 20 of the plate-like frame body 43.
The lock on the ceiling is released. Continue winch 7
The flat frame 43 is lowered by feeding the wire 72 out of the drum 71 by driving 0, and the dustproof film 40 is sequentially hung while the ceiling film 42 is kept horizontal.

By providing the flat plate-like frame body 43 on the ceiling film 42 of the dustproof film 40, the flat plate-like frame body 43 plays the role of a weight (weight) for lowering the ceiling film 42, and the gravity prevents dust. Since the air in the membrane 40 is in a compressed state, the air is promptly discharged to the outside through the suction duct 52 and the dust collecting filter 53 together with the driving of the suction blower 51.

Then, in a state in which the dustproof film 40 is hung on the floor sheet 60, the flat plate-shaped frame body 43 is attached to the dustproof film 40.
Is removed from the ceiling membrane 42 of the. In this case, since the flat plate-shaped frame body 43 is locked to the upper surface side of the ceiling film 42, the removal work of the flat plate-shaped frame body 43 from the ceiling film 42 is performed by the dustproof film 4.
It can be performed on the outside of 0, and the workability of removing the flat frame 43 is improved.

On the other hand, the flat plate-shaped frame 43 has the dustproof film 40.
If it is provided inside the, the worker has to fold it into a narrow space and enter the contaminated environment in the dust-proof film 40 contaminated with dust, but the flat frame 43 is dust-proofed. Providing on the outside of the membrane 40 eliminates this disadvantage.

Since the dustproof film 40 hung on the floorsheet 60 is closed by the floorsheet 60 whose bottom opening is spread on the floor F, the dustproof film 40 to which dust containing harmful substances adheres. The inner surface of the dustproof film 40 is surrounded by the outer surface of the dustproof film 40 and the floor sheet 60. Therefore, the dust containing the harmful substance adhered to the inner surface of the dustproof film 40 is The inconvenience of scattering to the outside is surely prevented.

In the dustproof film folding step P4, the dustproof film 40 suspended in the previous dustproof film suspending step P3 is folded together with the floor sheet 60. In this folding process, the dustproof film 40 is wrapped with the floor sheet 60. By doing so, in combination with the use of the joining structure 90, the dustproof film 40 contaminated with harmful substances is prevented from being exposed to the outside as much as possible, and the dustproof film 40 is prevented from being harmful during subsequent handling. It is possible to effectively prevent the scattering of the substance into the atmosphere.

Then, the dustproof film 40 folded in the dustproof film folding step P4 is carried out from the dustproof temporary building 10 to the outside, and then mounted on a transportation vehicle and carried to a predetermined harmful substance treatment facility (not shown). Then, appropriate processing is performed here.

FIG. 5 is a process drawing showing a second embodiment of the method for removing a dustproof film according to the present invention. In this embodiment, the dustproof membrane 40 is removed from the frame 20 through the floor sheet laying step P1, the contaminated air suction step P2, the dustproof membrane suspending step P3, and the dustproof membrane folding step P4. The present embodiment is the same as that of the first embodiment, but is different from the previous embodiment in that the dust-proof film washing step P2 ′ is executed before the dust-proof film suspending step P3 in the contaminated air suction step P2. ing.

The dustproof film washing step P2 'is a step of washing off the dust adhering to the inner surface of the dustproof film 40 prior to the dustproof film suspending step P3 of suspending the dustproof film 40 in the contaminated air suction step P2. is there. That is, in this dustproof film cleaning step P2 ', an operator who wears a predetermined protective clothing and enters the dustproof film 40 operates the compressed air jetting jig 80 such as an air jet gun to clean the dustproof film 40 inside. By injecting compressed air toward the surface, the dust adhering to the inner surface of the dustproof film 40 is removed. The dust removed from the inner surface of the dustproof film 40 is captured by the dust collecting filter 53 by driving the suction blower 51.

In the steps other than the dustproof film cleaning step P2 'in the method of removing the dustproof film of the second embodiment (floor sheet laying step P1, dustproof film hanging step P3 and dustproof film folding step P4), Processing similar to that of the embodiment is executed.

According to the dustproof film removing method of the second embodiment, in the dustproof film cleaning step P2 ', the dust adhering to the inner surface of the dustproof film 40 is actively removed and captured by the dust collecting filter 53. Therefore, the dustproof membrane folding process P
Dust generation during the folding process of the dustproof film 40 in 4 is reduced, which effectively suppresses dust contamination in the temporary dustproof building 10 and contributes to cleaning of the work environment.

As described in detail above, the method of removing the dustproof film 40 of the present invention is performed when the predetermined dismantling target equipment X is dismantled.
The dustproof film 40 stretched over the framework frame 20 so as to cover the facility X to be dismantled is removed after the dismantling work is completed, and the floor sheet 60 is spread over the floor in the framework frame 20 in advance. (Floor sheet laying process P1),
Subsequently, the air in the dustproof film 40 is sucked to clean the sucked air (polluted air suction step P2), and the dustproof film 4 is removed.
0 is hung down in sequence (dust-proof film hanging step P3),
The dustproof film 40 stacked on the floorsheet 60 is folded by enclosing it with the floorsheet 60 (dustproof film folding step P4).

Therefore, the dustproof film 40 hung from the frame 20 is spread on the floor F in a state where the air adhering to the inside of the dustproof film 40 is cleaned and the dust adhering to the inner surface is not scattered to the outside. Since it is stacked on 60 and is folded so as to be wrapped by the floor sheet 60 in this state, the dust adhering to the inner surface of the dustproof film 40 is reliably prevented from scattering to the outside during these operations. As a result, it is possible to effectively prevent environmental pollution due to scattering of harmful substances along with dust.

The dustproof film 40 folded together with the floor sheet 60 is transferred to a dedicated harmful substance treatment facility,
Since the detoxification treatment is appropriately performed in the harmful substance treatment facility, it is possible to reliably prevent the inconvenience of causing environmental pollution due to scattering of dust containing a harmful substance in the removal work of the dustproof film 40.

Further, the cleaning process of the contaminated air in the dustproof film 40 is performed by diverting the pressure adjusting means 50 equipped with the suction blower 51 and the dust collecting filter 53 used at the time of the disassembling operation of the equipment X to be dismantled. Since it is performed, it is not necessary to separately provide a device for cleaning the contaminated air, which contributes to the reduction of the equipment cost.

The dustproof film 40 has a ceiling film 4
2 is provided with a flat plate-like frame body 43 for supporting the membrane, and the hanging process of the dustproof film 40 is performed in a state in which the flat plate-like frame body 43 is suspended.
Due to the presence of the dust film 40, the ceiling film 42 is hung while the ceiling film 42 is maintained at the same height level, which allows the ceiling film 42 to be maintained at the same height level without using many lifting ropes. However, the dustproof film 40 can be lowered evenly and the work of hanging the dustproof film 40 can be facilitated.

Further, in the removing method of the second embodiment, the cleaning process is performed by injecting compressed air to the inner surface of the dustproof film 40 before suspending the dustproof film 40. The amount of dust emitted from the dustproof film 40 during the folding process of the dustproof film 40 in the film folding step P4 and the subsequent handling is reduced, and the dust containing harmful substances can be more reliably suppressed from scattering to the outside.

The present invention is not limited to the above-mentioned embodiment, but also includes the following contents.

(1) In the above embodiment, the dustproof temporary building 10 has the exterior body 30 on the outer surface side of the frame 20.
However, the present invention is not limited to the provision of the dustproof temporary building 10 including the exterior body 30, and the skeleton frame body 20 may be provided with the dustproof film 4.
A temporary building for dust protection may be configured by providing only 0.

(2) In the second embodiment described above, the dustproof film 4 is formed by jetting compressed air in the dustproof film cleaning step P2 '.
Although the air cleaning that removes the dust adhering to the inner surface side of No.
The cleaning process in 2'is not limited to the air cleaning, and the dust adhering to the dustproof film 40 can be removed by the water washing process by spraying the cleaning water on the inner surface of the dustproof film 40. May be. However, when such a water washing treatment is adopted, it is necessary to treat the waste water containing the harmful substances accumulated on the floor F.

Instead of air cleaning or water cleaning, finely pulverized dry ice powder particles are sprayed onto the dustproof film 40 at high pressure so that the dust adhering to the dustproof film 40 is captured by the dry ice. A dry ice cleaning method may be adopted. According to this cleaning method, the dust particles are trapped and dropped, and the dry ice particles are vacuum-sucked, and then collected and left at a predetermined place, so that the dust particles are naturally separated by sublimation of the dry ice particles. The post-treatment such as dust collection treatment and water treatment, which is required in the case of washing with water or water, becomes unnecessary, which can contribute to the reduction of the treatment cost.

(3) In the above embodiment, the air in the dustproof film 40 is forcibly sucked and discharged by driving the suction blower 51. Instead of this, the flat frame 43 is replaced. A predetermined weight may be placed on the top of the dustproof film 40, and the air in the dustproof film 40 may be discharged only by the volume reduction process of the dustproof film 40 through the flat frame 43 by the weight of the weight. In this case, the volume reduction rate of the dustproof film 40 can be controlled by adjusting the weight of the weight. By doing so, for example, when the suction blower 51 is not adopted in the dismantling work of the dismantling target equipment X,
Even if it is adopted or removed after the dismantling work is completed, since the internal air can be exhausted by reducing the volume of the dustproof film 40 due to the weight of the weight, the dust collecting filter 53 is provided in the suction duct 52. By providing only the exhaust air, it becomes possible to purify the exhaust air.

(4) In the above embodiment, an olefin-based synthetic resin such as polyethylene or polypropylene is used as the outer wall film 31, but in the present invention, the outer wall film 31 is an olefin-based synthetic resin sheet. Not limited to this, various sheets such as sheets made of nylon-based synthetic resin such as polyamide, and sheets made of natural fiber-based material such as cotton and hemp should be adopted. You can Furthermore, when the outer wall film 31 is repeatedly used, since it is not subjected to incineration treatment, a polyvinyl chloride-based synthetic resin sheet may be adopted as the outer wall film 31.

(5) In the above embodiment, the dustproof film 40 is made of synthetic resin containing no chlorine such as polyethylene and polypropylene, but in the post-treatment of the dustproof film 40 after being removed. When a melting furnace that is pyrolyzed at a high temperature is used, even if a dust-proof film 40 made of polyvinyl chloride is used, harmful substances such as dioxin are not produced, and therefore the polyvinyl chloride dust-proof film is not produced. 40 can be adopted. Since the dustproof film 40 made of polyvinyl chloride is inexpensive, it is economically advantageous.

(6) In the above embodiment, the belt-like sheet 91, the rope 92 and the flap film 93 as shown in FIG. 4 are provided between the lower end edge of the dustproof film 40 and the peripheral edge 61 of the floor sheet 60. Although the joining structure 90 is provided, the present invention is not limited to the joining structure 90 between the dustproof film 40 and the floor sheet 60 being composed of the belt-like sheet 91, the rope 92 and the flap film 93. Instead, for example, a plurality of weights such as concrete blocks may be placed at predetermined intervals at the stacking position of the folded-back portion of the lower edge portion of the dustproof film 40 and the peripheral edge portion 61 of the floor sheet 60. By doing so, the dustproof film 40
The joining structure between the floor sheet 60 and the floor sheet 60 becomes simple.

However, when such a joining structure is adopted, in the folding process of the dustproof film 40 in the dustproof film folding step P4, the dustproof film 40 should be carefully exposed so that its inner surface side is not exposed to the outside. It is necessary to wrap it with the sheet 60.

[0080]

According to the present invention, the dustproof film hung from the frame structure is stacked on the sheet body laid on the floor while the internal air is removed by suction, and is wrapped by the sheet body in this state. Since it folds in this way, for example, by preventing dust adhering to the inner surface during the cleaning process of suction air from scattering to the outside, it adheres to the inner surface of the dustproof film during the operation of suspending or folding the dustproof film. It is possible to reliably prevent the dust from being scattered to the outside, and to effectively prevent environmental pollution caused by the harmful substances being scattered along with the dust.

Further, since the dustproof film removed from the frame structure, which is conventionally performed, is not cut, it is possible to contribute to the reduction of the removal cost.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a structure for dismantling construction which is a target of a method for removing a dustproof film according to the present invention.

FIG. 2 is a sectional view taken along line AA of the structure for dismantling work shown in FIG.

FIG. 3 is a process drawing showing a first embodiment of a method for removing a dustproof film according to the present invention.

FIG. 4 is a diagram showing an embodiment of a joint structure of a hem portion of a dustproof film and a peripheral edge portion of a floor sheet, in which (a) is a partially cutaway perspective view, and (b) is a vertical sectional view of (a). It is a side view.

FIG. 5 is a process drawing showing a second embodiment of the dustproof film removing method according to the present invention.

FIG. 6 is a process diagram illustrating a conventional method for removing a dustproof film.

[Explanation of symbols]

10 Dustproof Temporary Building (Structure for Demolition Work) 11 Concrete Foundation 12 Gap Space 20 Frame Frame 21 Unit Rod 22 Spherical Joint 30 Exterior Body 31 Outer Wall Membrane 32 Roof 33 Galan 34 Carrying In / Out Building 35 Building Main Body 36 1st Door 37 Second door 40 Dust-proof film 41 Peripheral film 42 Ceiling film 43 Flat plate frame 50 Pressure adjusting means 51 Suction blower 52 Suction duct 53 Dust collecting filter 60 Floor sheet (sheet body) 61 Peripheral part 70 Winch 71 Drum 72 Wire 73 Pulley 80 Air-blowing jig 90 Bonding structure 91 Belt-shaped sheet 92 Rope 93 Flap film 94 Eyelet 95 Adhesive tape F Floor P1 Floor sheet laying process P2 Contaminated air suction process P2 'Dust-proof film cleaning process P3 Dust-proof film hanging process P4 Dust-proof membrane folding process X Equipment to be dismantled

Claims (5)

[Claims] 1. A method of removing a dustproof film, which is stretched over a framework frame so as to cover the target equipment of the dismantling work at the time of dismantling work, after the dismantling work is completed. The sheet body is spread on the floor of, and the dustproof membrane is successively hung down while sucking air in the dustproof membrane, and then the dustproof membranes stacked on the sheet body are wrapped by the sheet body and folded. How to remove the dustproof film. 2. The method for removing a dustproof film according to claim 1, wherein a lower end edge portion of the dustproof membrane having an opened lower end surface and a peripheral edge portion of the sheet body are joined to each other to form a bag shape. . 3. The method for removing a dustproof film according to claim 1, wherein the suction air is subjected to a cleaning treatment by diverting a predetermined dust collector used during the disassembling work. 4. The dustproof membrane is provided with a frame body for supporting a membrane on a ceiling portion thereof, and the hanging treatment of the dustproof membrane is carried out by hanging the frame body in a suspended state. The method for removing the dustproof film according to any one of claims 1 to 3, which is characterized in that. 5. The method for removing a dustproof film according to claim 1, wherein an inner surface of the dustproof film is washed before folding the dustproof film.