JP7324491B2 - DISPERSION PREVENTION DEVICE FOR COATING MATERIAL CONTAINING HAZARDOUS SUBSTANCES, PREVENTION METHOD, AND PREVENTION FOUNDATION - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for preventing scattering of coating materials containing hazardous substances, a method for preventing scattering of coating materials containing hazardous substances, and a scaffolding for preventing scattering of coating materials containing hazardous substances, and in particular to structures containing hazardous substances coated on buildings. An apparatus for preventing scattering of coating material containing harmful substances, a method for preventing scattering of coating material containing harmful substances, and a method for preventing scattering of dust of the coating material ground in a work area where the coating material is ground and peeled by a peeling means. The present invention relates to scattering prevention scaffolding for coating materials containing harmful substances.

Asbestos has long been used as a building material. Asbestos, commonly known as asbestos, is a naturally occurring, extremely fine mineral fiber with properties such as durability, heat resistance, chemical resistance, and electrical insulation. It was used in large quantities for various purposes such as sealing materials, heat insulating materials, etc.

However, when asbestos, which is an extremely fine mineral fiber, becomes dust and is inhaled through the respiratory tract, it causes damage to the pleura and bronchi, and eventually causes cancer such as lung cancer and mesothelioma. There is now a complete ban on the manufacture and use of asbestos.

However, although the manufacture and use of asbestos is now completely prohibited, asbestos has been used in large quantities in construction materials for many years. It is believed that many existing buildings still contain construction materials containing asbestos.

Asbestos, which has been widely used in construction materials in this way, not only scatters exposed asbestos in the form of dust, but it is also possible that large amounts of asbestos used in construction materials may scatter in the event of a disaster such as an earthquake. There is a need for measures to remove construction materials containing asbestos.

Asbestos is used not only in construction materials, friction materials, sealing materials, and heat insulating materials, but also in finish coating materials and base preparation coating materials. It was thought that the scattering of asbestos would be rare because it was fixed with resin or the like.

However, when dismantling a building, it is very difficult to remove the coating film of the coating material containing asbestos without breaking it. When dismantling a building coated with such an asbestos-containing coating material or recoating the coating, there is a risk that asbestos may scatter if there is a mistake in the treatment. Also, if the wall is broken without knowing that it contains asbestos, there is a danger that the asbestos will scatter.

Therefore, in order to prevent harmful substances such as asbestos dust from scattering outside the work area when dismantling the building or removing the interior materials of the building, etc., the work area should be made of plastic or the like. By enclosing it with a protective sheet and removing work in a negative pressure work area where the inside is maintained in a negative pressure state, the scattering of harmful substances is prevented.

In a negative pressure work area surrounded by such a curing sheet, the internal temperature rises and may cause heat stroke or dehydration. We are preparing the work environment.

However, as described above, by installing a cooling device, a dust collector, etc. in the negative pressure work area, it is possible to keep harmful substances in the negative pressure work area demarcated by the curing sheet, and to a certain extent the work environment can be improved. However, harmful substances are scattered around the workers, and there is a problem that the work environment is bad inside the negative pressure work area. Therefore, suction shot blasting and suction grinders have been developed to further improve the working environment in the negative pressure construction area (see Patent Document 1 or Patent Document 2, for example).

FIG. 3 is a cross-sectional view showing the configuration of the nozzle head disclosed in Patent Document 1. As shown in FIG.
As shown in FIG. 3, the suction type shot blasting 10 disclosed in Patent Document 1 includes grinding granules 11 for grinding a coating material 22 containing harmful substances coated on a wall surface 21 of a building 20. , which grinds the coating material 22 by colliding it with the wall surface 21 and sucks the dust separated from the wall surface 21 by grinding, and is equipped with a nozzle head 12, a particle recovery separation tank 13, and a pressure tank 14. ing.

The nozzle head 12 includes a cylindrical injection nozzle 12a for injecting the abrasive granules 11 toward the wall surface 21, and a connection for recovering the coating material 22 ground by colliding the abrasive granules 11 against the wall surface 21. It is composed of a metal cover portion 12c provided with a hole 12b.
One tip side of the cylindrical injection nozzle 12a is inserted into and fixed to a through hole formed in the center of the cover portion 12c and having the same diameter as the injection nozzle 12a.

A brush 12e having a predetermined length is provided at the peripheral end of the opening 12d of the cover portion 12c so as to contact the wall surface 21 or the coating material 22. The brush 12e is positioned at the peripheral end of the opening 12d. By coming into contact with the wall surface 21 or the coating material 22, it is possible to prevent dust from the peeled coating material 22 from scattering.

The injection nozzle 12a is fixed from the center of the cover portion 12c toward the center of the opening 12d so as to inject the abrasive granules 11 into the center of the area surrounded by the brush 12e.

A part of the cover portion 12c is provided with a connecting hole 12b for communicating with the internal space and connecting with the granular material collection/separation tank 13 via a suction hose 15 connected to a suction device (not shown here). there is A tip of a suction hose 15 is connected to the connecting hole 12b.

The granule recovery and separation tank 13 is for recovering the dust of the ground coating material 22 and the grinding granules 11 and separating the recovered dust of the coating material 22 and the grinding granules 11 .
Since the recovered grinding granules 11 are heavier than the dust of the coating material 22, they drop into the pressurized tank 14 provided below the granule recovery separation tank 13 and are recovered.

The dust on the coating material 22 is sucked by a suction hose 30 connected to the granular material collection and separation tank 13, and the air cleaned through a dust collector and an air cleaning device (not shown) is sucked by the suction device into the outside air. Ejected.

The abrasive granules 11 collected in the pressurized tank 14 are pressure-fed to the nozzle head 12 via the blast hose 16 after being subjected to air pressure. The abrasive granules 11 pressure-fed to the nozzle head 12 are jetted toward the wall surface 21 from the jet nozzle 12a. In this way, the abrasive granules 11 circulate through the nozzle head 12, the granule recovery separation tank 13, and the pressurized tank .

In the suction type shot blasting 10 , the operator holds the nozzle head 12 and presses the opening 12 d of the nozzle head 12 against the coating material 22 coated on the wall surface 21 .
When the pressurization tank 14 is driven while the nozzle head 12 is pressed against the wall surface 21, the abrasive granules 11 circulate through the nozzle head 12, the granule recovery/separation tank 13, and the pressurization tank 14. A coating material 22 coated on 21 is ground.

At this time, the air inside the cover portion 12c sealed by the cover portion 12c and the brush 12e is sucked from the suction hose 15 connected to the connecting hole 12b by the suction operation of the suction device, and at the same time the air is removed by grinding. The dust of the coating material 22 and the grinding granules 11 are sucked from the front end of the suction hose 15 toward the rear end.

The dust of the coating material 22 sucked through the suction hose 15 and the grinding granules 11 are separated in the granule recovery separation tank 13, and the dust of the coating material 22 moves from the front end to the rear end of the suction hose 30. It is sucked towards.

As a result, the dust of the coating material 22 removed by the suction type shot blasting 10 is sucked by the suction device, and the cleaned air is discharged to the outside air through the dust collector and the air cleaning device, so that the negative pressure construction zone Better working environment inside.

FIG. 4 is a cross-sectional view showing the configuration of the suction grinder disclosed in Patent Document 2. As shown in FIG.
As shown in FIG. 4, the suction grinder 40 disclosed in Patent Document 2 includes a main body portion 41 having a motor portion for rotating and driving (not shown), and a motor portion protruding from the main body portion 41 and provided in the main body portion 41. A motor shaft 42 that rotates by rotational driving, a disk-shaped grinding wheel 43 connected to the tip of the motor shaft 42, and a metal cover part provided to cover the motor shaft 42 and the grinding wheel 43 from the main body part 41. 44.

One tip side of the body portion 41 is inserted into a through hole formed in the center portion of the cover portion 44 and having the same diameter as the diameter of the body portion 41 and is fixed. The grinding surface 43a of the grinding wheel 43 connected to the tip of the motor shaft 42, which protrudes from the tip of the main body 41, is exposed from the opening 44a of the cover 44. .

The grinding wheel 43 is, for example, a disc-shaped grindstone, and has a grinding surface 43a with a large number of irregularities, and is formed in a disc shape from a hard material such as aluminum oxide or silicon. Further, the grinding wheel 43 is rotated by a motor part incorporated in the main body part 41 to rotate, so that the coating material 22 applied to the wall surface 21 can be peeled off.

A brush 45 having a predetermined length is provided at the peripheral edge of the opening 44a of the cover 44 so as to be in contact with the wall surface 21 or the coating material 22. The brush 45 is positioned at the peripheral edge of the opening 44a. By coming into contact with the wall surface 21 or the coating material 22, it is possible to prevent dust from the peeled coating material 22 from scattering.

A part of the cover portion 44 is provided with a connecting hole 44b that communicates with the internal space and connects with a suction hose 30 connected to a suction device (not shown). The tip of the suction hose 30 is connected to the connecting hole 44b.

In the suction grinder 40 , the operator drives the motor unit incorporated in the main body 41 while gripping the main body 41 . Next, the operator brings the suction grinder 40 closer to the coating material 22 coated on the wall surface 21 with the opening 44a thereof facing.

Next, the worker grinds the coating material 22 coated on the wall surface 21 with the grinding surface 43 a of the rotating grinding wheel 43 while pressing the tip of the brush 45 against the coating material 22 coated on the wall surface 21 .
At this time, the air inside the cover portion 44 sealed by the cover portion 44 and the brush 45 is sucked from the suction hose 30 connected to the connecting hole 44b by the suction operation of the suction device, and at the same time, the air inside the cover portion 44 is removed by grinding. Dust on the coating material 22 is sucked from the front end to the rear end of the suction hose 30, and the air cleaned through a dust collector or an air cleaning device (not shown) is sucked by the suction device and discharged to the outside air. be.

As a result, the dust of the coating material 22 peeled off by the suction grinder 40 is sucked by the suction device, and the air purified through the dust collector and the air cleaning device is discharged to the outside air. Better working environment in

Japanese Patent Application Laid-Open No. 2015-4223 Japanese Patent Application Laid-Open No. 2016-3509

However, even with the suction type shot blast 10 and the suction type grinder 40 disclosed in Patent Document 1 and Patent Document 2, there is a problem that dust particles of harmful substances such as asbestos that cannot be completely sucked scatter.

Specifically, in the techniques disclosed in Patent Document 1 and Patent Document 2, the coating material 22 is applied to the openings 12d and 44a, which are the suction surfaces of grinding means such as the suction shot blast 10 and the suction grinder 40. The coating material 22 is ground while being pressed against the wall surface 21 .

However, since these are manually operated by workers, if there is a gap between the wall surface 21 coated with the coating material 22 and the suction surface of these grinding means, the coating material must be removed from the gap. It is conceivable that 22 dust leaks.

This may be solved by firmly pressing the suction type shot blast 10 or the suction type grinder 40 against the wall surface 21 coated with the coating material 22, but the wall surface 21 coated with the coating material 22 is not necessarily flat. It cannot be said that there is.

For example, if the wall surface 21 has an uneven surface, if the uneven surface and the openings 12d and 44a, which are the suction surfaces of the grinding means, do not match exactly, gaps will occur, and dust from the coating material 22 will pass through the gaps. is likely to leak.

Further, if the grinding means such as the suction shot blast 10 or the suction grinder 40 does not completely suck the coating material 22 that has been ground and peeled off from the wall surface 21, the grinding means is separated from the wall surface 21. , the opening 12d, which is the suction surface, is exposed, and dust from the coating material 22 is scattered by the grinding granules 11 ejected from the suction type shot blast 10 and the grinding wheel 43 rotating by the suction type grinder 40.

The cover portion 12c and the cover portion 44 are configured to cover the opening portions 12d and 44a, which are the suction surfaces, and inside the cover portion 12c and the cover portion 44, it is possible to determine whether the dust of the coating material 22 has been completely sucked. It is impossible for the operator to judge whether the dust of the coating material 22 that has not been completely sucked remains inside the cover portion 12c or the cover portion 44 when the grinding means is separated from the wall surface 21. In this case, the dust of the coating material 22 is violently scattered, which poses a very serious problem.

The present invention has been made in view of the above points, and provides a hazardous substance scattering prevention device, a hazardous substance scattering prevention method, and a hazardous substance scattering prevention scaffold for preventing the scattering of harmful substances generated during grinding work. With the goal.

In order to solve the above-mentioned problems, the present invention aims to prevent the scattering of dust from the ground coating material in a working area where the coating material containing harmful substances coated on the building is ground and peeled off by a peeling means. and spraying means for spraying misty water droplets from above the building toward the inside of the work area, and the work area containing the misty water droplets sprayed by the spraying means There is provided a scattering prevention device for coating materials containing harmful substances, characterized by comprising suction means for sucking and purifying the air inside.

As a result, the spraying means sprays misty water droplets from above the building toward the inside of the work area, and the suction means sucks the air in the work area containing the misty water droplets sprayed by the spraying means. to purify.

In addition, in the present invention, a coating material containing a harmful substance applied to a building is ground by a peeling means and peeled off, and the coating material containing the harmful substance is ground in a working area to prevent the scattering of dust from the coating material containing the harmful substance. In the anti-scattering method, the spraying means sprays mist-like water droplets from above the building toward the inside of the work area; and the suction means includes the mist-like water droplets sprayed by the spraying means. and a step of sucking and purifying air in a work area.

As a result, the spraying means sprays misty water droplets from above the building toward the inside of the work area, and the suction means sucks the air in the work area containing the misty water droplets sprayed by the spraying means. to purify.

In addition, in the present invention, a coating material containing a harmful substance applied to a building is ground by a peeling means and peeled off, and the coating material containing the harmful substance is ground in a working area to prevent the scattering of dust from the coating material containing the harmful substance. In the anti-scattering scaffolding, a spraying means for spraying misty water droplets at a predetermined interval from above the building toward the inside of the work area, and the work area containing the misty water droplets sprayed by the spraying means There is provided a scaffold for preventing scattering of coating materials containing harmful substances, characterized by comprising suction means for sucking and purifying the air.

As a result, the spraying means sprays misty water droplets from above the building toward the inside of the work area, and the suction means sucks the air in the work area containing the misty water droplets sprayed by the spraying means. to purify.

According to the apparatus for preventing scattering of coating materials containing hazardous substances, the method for preventing scattering of coating materials containing hazardous substances, and the scaffolding for preventing scattering of coating materials containing hazardous substances of the present invention, the spray means is directed toward the inside of the work area. sprays misty water droplets from above the building, and the suction means sucks and purifies the air in the work area containing the misty water droplets sprayed by the spraying means, so that the misty water droplets sprayed by the spraying means The water droplets absorb the dust of harmful substances generated during the grinding work and fall, and the suction means sucks the air in the work area containing the dust of the harmful substances that has absorbed the dust of the harmful substances. It is possible to prevent scattering of harmful substances.

1 is a cross-sectional view showing a harmful substance scattering prevention device according to an embodiment; FIG. Fig. 2 is a cross-sectional view showing a sprayer installed on a scaffold; FIG. 2 is a cross-sectional view showing the configuration of a nozzle head disclosed in Patent Document 1; FIG. 2 is a cross-sectional view showing the configuration of a suction grinder disclosed in Patent Document 2;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a sectional view showing a harmful substance scattering prevention device according to this embodiment.
Hazardous substance scattering prevention device 100 of the present embodiment employs removal work in which worker 400 grinds and removes coating material 22 containing harmful substances such as asbestos coated on wall surface 21 of building 200. This is to prevent the dust of the coating material 22 generated when the coating material 22 is peeled off from the wall surface 21 from scattering around.

As shown in FIG. 1, a scaffolding 300, which is a provisional structure, is assembled around the periphery of a building 200 to serve as a foothold for people working at heights in general construction work. By getting on the scaffold 300, the worker 400 can grind and remove the coating material 22 containing harmful substances coated on the wall surface 21 of the building 200 at any height. The following description will be made with the area inside the scaffolding 300 assembled on the peripheral surface of the building 200 as the working area.

The hazardous substance scattering prevention device 100 includes a pressure feeder main body 110, a sprayer 120 arranged at a desired position on the scaffolding 300 for spraying water droplets in the form of a mist, a delivery pipe 130 connecting the pressure feeder main body 110 to the sprayer 120, and a coating. A suction device 140 for collecting dust from the material 22 and discharging harmless air, and a waterproof sheet 150 are provided.

The pump body 110 is placed on a stable location, such as the ground adjacent to the building 200, and is connected to the atomizer 120 via a delivery tube 130, powered by power supplied by a power supply, not shown here. A pumping device for delivering the object through the tube 130 to the sprayer 120 .

The object here is moisture or gas required for spraying by the sprayer 120 . In addition, the pump body 110 can be provided with a mist generating means for generating mist, in which case the pump body 110 is an object which is a mist of water droplets and gas generated by the mist generating means through the delivery pipe 130. Material is pumped to atomizer 120 .

The delivery pipe 130 connects the pump body 110 and the sprayer 120 arranged at a desired position on the scaffolding 300 to deliver the object pumped from the pump body 110 to the sprayer 120.

For example, the delivery pipe 130 is a rigid delivery pipe made of metal or the like that is fixed together with the scaffolding 300 in advance. It is connected to the atomizer 120 placed at the desired location.

By forming the scaffolding 300 in a desired shape in advance so that the delivery pipe 130 is connected when the scaffolding 300 is assembled, the rigid delivery pipe improves workability and easily scatters harmful substances. A prevention device 100 can be installed.

Also, the delivery pipe 130 may be a flexible delivery pipe made of rubber, vinyl, or the like. In this case, the delivery pipe 130 can be routed to the assembled scaffolding 300 via an arbitrary route. As a result, the harmful substance scattering prevention device 100 can be easily incorporated into the existing scaffolding 300 .

The sprayer 120 is for spraying water droplets in the form of a mist from an object pumped from the pump body 110 through the delivery pipe 130, and is placed at a desired position on the scaffolding 300 to spray the wall surface of the building 200. Atomized water droplets are jetted toward 21 and the worker 400 .

A plurality of sprayers 120 can be arranged at desired positions on the scaffolding 300. In this case, the delivery pipe 130 can be branched from the pump main body 110 to the delivery pipe 130 at any position.

The mist-like water droplets sprayed by the sprayer 120 are directed toward the wall surface 21 provided in the building 200 and the worker 400, and dust of the coating material 22 peeled off from the wall surface 21 by the removal work performed at the worker 400. Adsorb.

Eventually, the misty water droplets sprayed by the sprayer 120 and the misty water droplets absorbing the dust of the coating material 22 fall vertically downward along the wall surface 21 of the building 200 due to their weight.
As a result, even if the dust of the coating material 22 scatters due to the removal work of the operator 400, the mist-like water droplets sprayed by the sprayer 120 absorb the dust of the coating material 22 and cause the dust to drop. It is possible to prevent the spread of dust from the material 22 .

In addition, as the mist-like water droplets sprayed by the sprayer 120 fall vertically downward along the wall surface 21 of the building 200, the air flow near the wall surface 21 of the building 200 is vertically downward. work. As a result, the dust of the coating material 22 also moves along with the air flow in the vertically downward direction. As a result, it is possible to prevent the dust from the coating material 22 from spreading.

Suction device 140 is a vacuum device for collecting dust from coating material 22 and discharging harmless air using power supplied by a power supply device (not shown). , and sucks the dust of the coating material 22 falling from above and mist-like water droplets adsorbing the dust of the coating material 22. - 特許庁

For example, the suction device 140 includes a suction port for taking outside air into the suction device 140, a filter for cleaning the air taken in the suction device 140, a roots blower, an electric motor, and normalized air inside the main body of the device. It has an exhaust port with a silencer function that discharges , and these internal devices are connected by an exhaust pipe. Moreover, the suction port and the exhaust port are separated by a waterproof sheet 150, which will be described later.

As a specific example, in the suction device 140, the roots blower is rotated by driving the electric motor, and the gas sucked into the main body of the device through the suction port and the exhaust pipe is discharged to the outside through the exhaust port. , generating a suction force at the suction port.

By this suction force, dust of the coating material 22 falling from the upper part and misty water droplets adsorbing the dust of the coating material 22 can be sucked in the vicinity of the bottom adjacent to the wall surface 21 of the building 200. - 特許庁

The suction capacity of the suction device 140 varies depending on the number and size of the roots blowers rotated inside the device main body. The mist-like water droplets adsorbing the dust and the dust of the coating material 22 can be efficiently formed.

Further, since the suction force is high, the suction port of the suction device 140 is connected or branched by a suction hose or the like, and the dust of the coating material 22 or the dust of the coating material 22 is adsorbed at a desired position of the scaffolding 300 to obtain a mist-like dust. You may make it suck a water droplet.

Further, a dust collector for collecting dust from the coating material 22 or mist-like water droplets that have adsorbed the dust from the coating material 22 can be installed in front of the suction device 140 on the suction side.
Further, an air purifier may be provided between the suction device 140 and the dust collector for further purifying the air after the dust has been collected by the dust collector.

The dust collector is, for example, a receiver tank that detachably incorporates a dust collection filter called a bag filter that removes fine dust, soot, and fine harmful substances. It is provided with a dust collection tank main body to be stored and a dust collection bag installed inside the dust collection tank main body to store the collected dust.

The dust collector is connected to a suction device 140 or an air purifying device at the rear by a suction hose or the like. The dust of the coating material 22 and the mist-like water droplets adsorbing the dust of the coating material 22 are sucked and collected by the dust collection filter.

An air purifying device is a device detachably incorporating a HEPA filter called a HEPA (High Efficiency Particulate Air Filter) filter for removing dirt, dust, etc. from the air to clean the air. and a device main body that houses the filter inside.

The dust collector is connected to the front of the dust collector and to the rear of the suction device 140 by a suction hose or the like, and the air near the bottom adjacent to the wall surface 21 of the building 200 is sucked into the dust collector by the suction force of the suction device 140. This further purifies the air after the dust collector collects dust.

By arranging the dust collector and the air cleaning device in front of the suction device 140 on the suction side in this way, the air discharged by the suction device 140 to the outside can be made cleaner. Moreover, the burden on the suction device 140 that performs suction operation can be reduced.

The waterproof sheet 150 serves to prevent the mist-like water droplets sprayed by the sprayer 120 from leaking out of the work area, or to prevent moisture from entering the work area from the outside.

Mainly to prevent the mist-like water droplets sprayed by the sprayer 120 from leaking outside from the work area, a waterproof sheet 151 is placed on the ground on which the scaffolding 300 is installed from the wall surface 21 to the outside of the scaffolding 300. be laid.
Moreover, the waterproof sheet 151 is vertically provided in the vicinity of the central portion of the suction device 140 so as to straddle the suction port and the exhaust port and partition the working area from the outside air.

These waterproof sheets 151 prevent mist-like water droplets sprayed by the sprayer 120 falling vertically downward and mist-like water droplets adsorbing the dust of the coating material 22 from leaking outside from the work area. can be done.

A waterproof sheet 152 is provided on the top of the scaffolding 300 as a waterproof sheet 150 for preventing moisture from entering the work area from the outside. It is provided to cover between

By arranging this waterproof sheet 152, it is possible to prevent rain from entering the work area during rainy weather. As a result, removal work can be efficiently performed even in rainy weather.

Further, by arranging the waterproof sheet 152, it is possible to prevent the misty water droplets sprayed by the sprayer 120 and the misty water droplets adsorbing the dust of the coating material 22 from leaking outside from the working area.

Usually, the worker 400 grinds and removes the coating material 22 containing harmful substances such as asbestos coated on the wall surface 21 of the building 200 from the upper part of the building 200. As it ends, the process proceeds toward the bottom of the building 200 .

At this time, by installing the waterproof sheet 152 in front of the uppermost part where the work is performed, the rain that enters from the outside, the mist-like water droplets sprayed by the sprayer 120, and the mist-like water droplets that adsorb the dust of the coating material 22 are prevented. , can be prevented from leaking outside from the work area.

Next, a procedure for removing the coating material 210 containing harmful substances, which is performed using the harmful substance scattering prevention device 100 of the present embodiment, will be described.
First, a machine operator 410 (not shown) drives the pump body 110 and the suction device 140 . As a result, misty water droplets are sprayed through the sprayer 120 within the working area, and the falling misty water droplets and air are sucked by the suction device 140 and exhausted outside the working area.

In this state, the worker 400 who performs the peeling work of the coating material 22 grinds the coating material 22 using the aforementioned peeling device or the like, and peels off the coating material 22 .
The dust of the coating material 22 generated by this work is sucked by a removing device or the like, or scatters around the operator 400 .

The dust of the coating material 22 scattered around the worker 400 is absorbed by the atomized water droplets sprayed by the sprayer 120 or falls vertically downward.
The dust of the coating material 22 falling vertically downward and the dust of the coating material 22 adsorbed by mist-like water droplets sprayed by the sprayer 120 are eventually sucked into the suction device 140 by the suction force of the suction device 140 and purified. The filtered air is exhausted outside the work area. As a result, it is possible to prevent harmful substances from scattering during the grinding operation.

In this embodiment, an example in which the inside and outside of the work area are not covered with an airtight member has been described. The work area can be partitioned in an airtight state by providing the cover in such a manner. As a result, the dust of the coating material 22 generated in the work area, the mist-like water droplets sprayed by the sprayer 120, and the dust of the coating material 22 adsorbing the dust of the coating material 22 are further prevented from leaking to the outside. be able to.

Furthermore, the atomized water droplets sprayed by the sprayer 120 cause the dust of the coating material 22 to be adsorbed or fall vertically downward, so that the dust of the coating material 22 is scattered within the airtightly partitioned work area. and the operator 400 can work in a safe environment.

Furthermore, when the work area is partitioned in an airtight state, the inside of the work area becomes in a negative pressure state due to the suction and exhaust operations of the suction device 140 . As a result, it is possible to prevent air containing dust from the coating material 22 in the work area and mist-like water droplets sprayed by the sprayer 120 from leaking out of the work area.

FIG. 2 is a cross-sectional view showing a sprayer installed on a scaffold.
As shown in FIG. 2, sprayers 120 are positioned at desired locations on scaffolding 300 to spray a mist of water droplets.

Specifically, the sprayer 120 is installed so as not to interfere with the work of the worker 400, for example, the intersection of the lower side of the upper floor tread 310 and the frame 320 provided in the assembled scaffolding 300,
Here, it may be fixed to a handrail or the like of the scaffolding 300 (not shown).

Also, the sprayers 120 are installed on the scaffolding 300 at predetermined intervals. The interval at which the sprayers 120 are installed may be adjusted according to the spray amount of mist-like water droplets sprayed by the sprayers 120 .
Specifically, when the spray amount of the mist-like water droplets sprayed by the sprayer 120 is small, it can be installed on the lower surface of the footboard 310 provided on the scaffolding 300 on each floor, or the mist-like water droplets sprayed by the sprayer 120 can be installed. If the amount of sprayed water droplets is large, it can be installed on the lower surface of the footboard 310 provided on the scaffolding 300 on the alternate floor.

A plurality of sprayers 120 can also be installed in the passage direction of the tread 310, and in this case also, the intervals at which the sprayers 120 are installed can be adjusted according to the amount of water droplets sprayed by the sprayers 120.

It should be noted that these sprayers 120 may be arranged at intervals such that the spray areas in which the sprayers 120 spray mist-like water droplets overlap each other. As a result, the spray area spreads over the entire work area, and the dust of the coating material 22 is absorbed by the sprayed water droplets in the entire work area. can be aspirated and exhausted.

The sprayer 120 is fixed at a desired position on the scaffolding 300. When the sprayer 120 is fixed on the scaffolding 300, the spraying direction of the sprayer 120 can be arbitrarily changed to flexibly adjust the spraying angle. An adjustment fixture 121 may be used.

Accordingly, the spray direction of the mist-like water droplets sprayed by the sprayer 120 can be arbitrarily set. Basically, the spray direction of the mist-like water droplets sprayed by the sprayer 120 is fixed toward the wall surface 21 of the building 200 and downward. The direction may be changed to the working direction of worker 400 .

In addition, the sprayer 120 pressure-feeds misty water droplets generated by the mist generating means provided in the pumping machine main body 110 through the delivery pipe 130, and the sprayer 120 sprays the misty water droplets. The pump body 110 may pump water to the sprayer 120 through 130, and the sprayer 120 may generate and spray a mist of water droplets.

In this case, for example, the sprayer 120 is provided with a water holding tank 122 for holding the water pressure-fed from the pressure-fed machine body 110, and the sprayer 120 is provided with mist-like water droplets generated by a mist generating means (not shown) provided in the sprayer 120. to spray.

Examples of fog generating means included in the pressure transmitter main body 110 and the sprayer 120 include an ultrasonic fog generating device that atomizes the moisture in the water holding tank 122 by irradiating ultrasonic waves to the moisture in the water holding tank 122, and and a steam type fog generator that heats to generate steam.

In the case of an ultrasonic fog generator, since water droplets are generated in the form of a mist by ultrasonic waves, no heat is required, so cold water droplets in the form of a mist can be sprayed into the work area even in hot weather such as summer. This allows the worker 400 to work comfortably within the work area.

Also, in the case of a steam type fog generator, since water is heated to generate steam, warm water droplets in the form of a mist can be sprayed into the work area even in cold seasons such as winter. This allows the worker 400 to work comfortably within the work area.

Further, the atomizer 120 can also use a hybrid fog generator that combines an ultrasonic fog generator and a steam fog generator.
It should be noted that, if the spray amount of the mist-like water droplets sprayed by the sprayer 120 is large, it may affect the electric tool held by the worker 400 for grinding work. Specifically, the aforementioned suction grinder and the like can be used.

Since this suction grinder grinds the coating material 210 by rotating the grinding wheel with the supplied electric power, if a large amount of water droplets is sprayed, the electric tool may be short-circuited and broken. In addition, the operator 400 may be electrocuted.
For this reason, it is desirable that the atomized water droplets ejected by the sprayer 120 have a particle size and an ejection amount that do not affect electronic devices such as electric tools that perform grinding operations.

In addition, the atomized water droplets sprayed by the sprayer 120 absorb the dust of the coating material 210 and cause them to fall vertically downward. There is a risk that the dust will scatter again. For this reason, it is desirable that the mist-like water droplets ejected by the sprayer 120 have a particle size and an ejection amount that do not evaporate until the suction device 140 sucks them after they are ejected by the sprayer 120 .

REFERENCE SIGNS LIST 100 Harmful substance scattering prevention device 110 Pumping machine body 120 Sprayer 121 Angle adjustment fixture 122 Water retention tank 130 Delivery pipe 140 Suction device 150, 151, 152 Waterproof sheet 200 Building 210 Painting material 300 Scaffolding 310 Tread 320 Frame 400, 410 Work person

Claims (14)

A scattering prevention device for a coating material containing a hazardous substance that prevents the scattering of dust from the coating material that has been ground in a work area where the coating material containing a hazardous substance coated on a building is ground and stripped by a stripping means,
The height direction, the width direction, and the depth direction of the building so as to surround the work area, and the spraying areas to which the water droplets are sprayed are overlapped in the height direction, the width direction, and the depth direction, and the spray direction of the water droplets is the building. a plurality of spray means disposed obliquely downward on the object side ;
a suction means for sucking and purifying the air in the working area containing the atomized water droplets sprayed by the spraying means;
A scattering prevention device for a coating material containing a hazardous substance, comprising: The spraying means is
Placed on a scaffold installed to separate the outside and the inside of the work area;
The anti-scattering device for coating materials containing harmful substances according to claim 1. A pumping means for pumping the misty water droplets generated by the fogging means, comprising a mist generating means for generating the misty water droplets;
connecting means for connecting the spraying means and the pumping means;
The anti-scattering device for coating materials containing harmful substances according to claim 1 , characterized by comprising: The connecting means is
4. The anti-scattering device for coating materials containing harmful substances according to claim 3 , wherein the scaffolding is a flexible pipe member having flexibility that can be arranged in any route on the installed scaffolding. The connecting means is
It is a connecting pipe member that is fixed to the scaffold to be installed and connected along a predetermined route along with the assembly of the scaffold.
The anti-scattering device for coating materials containing harmful substances according to claim 3 , characterized in that: The spraying means is
angle adjusting means capable of adjusting the direction of spraying the misty water droplets at an arbitrary angle;
The anti-scattering device for coating materials containing harmful substances according to claim 1 , characterized by comprising: the spraying means includes the mist generating means in place of the pressure-feeding means, and the pressure-feeding means pressure-feeds moisture for the mist generating means to generate the mist-like water droplets;
The anti-scattering device for coating materials containing harmful substances according to claim 3 , characterized in that: The fog generating means is
It is a steam type fog generator that heats moisture to generate steam,
The anti-scattering device for coating materials containing harmful substances according to claim 3 , characterized in that: The fog generating means is
It is an ultrasonic fog generator that atomizes water by irradiating it with ultrasonic waves.
The anti-scattering device for coating materials containing harmful substances according to claim 3 , characterized in that: The scaffold is
an airtight covering that covers the work area in an airtight state;
The anti-scattering device for coating materials containing harmful substances according to claim 2, characterized by comprising: The peeling means is
A power drive unit driven by the supplied power,
The particle size of the mist-like water droplets sprayed by the spraying means is
The particle size is such that the power drive unit is not affected;
The anti-scattering device for coating materials containing harmful substances according to claim 1. The particle size of the mist-like water droplets sprayed by the spraying means is
The particle size is such that it does not evaporate until it is sucked by the suction means;
The anti-scattering device for coating materials containing harmful substances according to claim 1. In a method for preventing scattering of coating material containing hazardous substances, the method comprises:
The height direction, the width direction, and the depth direction of the building so as to surround the work area, and the spraying areas to which the water droplets are sprayed are overlapped in the height direction, the width direction, and the depth direction, and the spraying direction of the water droplets is the construction. a step of arranging a plurality of spray means directed obliquely downward on the object side ;
a step of sucking and purifying the air in the working area containing the atomized water droplets sprayed by the spraying means;
A method for preventing scattering of a coating material containing a hazardous substance, comprising: Scaffolding for preventing scattering of coating materials containing harmful substances that prevents scattering of dust of the coating materials ground in a work area in which the coating materials containing harmful substances coated on a building are ground and peeled by a peeling means,
The height direction, the width direction, and the depth direction of the building so as to surround the work area, and the spraying areas to which the water droplets are sprayed are overlapped in the height direction, the width direction, and the depth direction, and the spraying direction of the water droplets is the construction. a plurality of spray means disposed obliquely downward on the object side ;
a suction means for sucking and purifying the air in the working area containing the atomized water droplets sprayed by the spraying means;
Scaffolding for preventing scattering of coating materials containing hazardous substances, characterized by comprising: