JPH02112557A - Asbestos remover for steel-frame beam - Google Patents

Abstract

PURPOSE:To greatly raise the efficiency of operation compared to manual operations for saving power required by a method in which a wire brush covered doubly with inner and outer hoods is set on a moving truck and asbestos is removed by electric power. CONSTITUTION:A rotary wire brush 15 is doubly covered with inner and outer hoods 8, and the inside of both the hoods is evacuated by air suction in such a way as to avoid the pollution of environments by the fine powder of asbestos. Flange-inserting slits 10 are formed to match various sizes of steel-frame beams 9 in front and back sides of the outer hood 8. The excess side space of the outer hood 8 below the beams 9 is closed by a movable hood 22 to prevent the occurrence of trouble even when the sizes are different. Asbestos can thus be removed from the beams 9 of various sires by only one device.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for removing asbestos sprayed onto steel beams of buildings.

(Prior Art) Asbestos is a natural mineral and has been widely used in the interior of buildings since ancient times because it has excellent fire resistance, heat resistance, and soundproofing effects.

However, in recent years, it has become clear that inhaling the microscopic fibers can penetrate the lungs and cause lung cancer, and work has begun to remove asbestos from buildings.

However, during removal, asbestos dust is scattered, so conventional removal work is carried out carefully by hand, taking into consideration the health and safety of workers and environmental protection.

First, cover the floors, walls, pipes, and ducts on both sides of the building with vinyl sheets.

Next, a scaffold for the work will be assembled, and this scaffold will also be covered with vinyl sheets.

A dust collector is installed before work begins, and dust is collected throughout the work area from beginning to end during work.

All workers will wear dust-proof clothing, dust-proof masks, and gloves, and use a spatula to scrape off asbestos adhering to the steel beams, and then use a wire brush to remove any residue. After the asbestos falls onto the floor of the building, it is swept up using creeping trees, etc., packed in a plastic bag, sealed, and taken outside.The floor is then cleaned by wiping it with a wet mop to ensure that no asbestos remains.

When entering and exiting the work area, workers must put on and take off dustproof clothing and masks in the changing room.

After removing asbestos, the vinyl sheets will be removed and disposed of, and the scaffolding will be dismantled.

(Problem to be solved by the invention) In the past, asbestos was not only inefficient because it was done manually, but also required skill to remove asbestos from steel beams because the work was done at high places. The disadvantage was that it was easy for this to occur. Additionally, during work, asbestos dust is scattered and suspended in the surrounding area, creating a poor working environment and posing a health risk.Also, workers have to wear highly airtight dust-proof clothing, which causes them to sweat, resulting in hard work. .

The present invention eliminates the disadvantages of conventional manual labor, and improves work efficiency through mechanization. It also completely removes asbestos from steel beams, and prevents asbestos from scattering to improve work safety. The purpose is to improve sexuality.

(Means for Solving the Problems) The present invention provides a rotary wire brush, an inner hood and an outer hood for dustproofing that double cover the outside of the brush, and a movable one that closes off an extra opening of the outer hood. It consists of a hood and a mobile trolley on which these are mounted.

The outer hood of the present invention has a structure in which the front and top surfaces of the hood that face the steel beams on which asbestos is attached are open, and the front and rear surfaces of the outer hood have a plurality of strips into which the flanges of the steel beams are slidably inserted. Drill a flange insertion slit.

An inner hood made of a flexible material that comes into contact with the steel beam is connected to the inside of the outer hood, and a gap for intake of outside air is formed between the inner and outer hoods.

A rotary wire brush is housed inside the inner hood, and the brush rotating shaft is installed so as to be movable up and down relative to the outer hood.

A movable hood is connected to the outer hood so as to be movable up and down, and an extra front opening of the outer hood that should be viewed below the steel beam is closed off by the movable hood.

A suction duct leading to a suction exhaust fan via a dust collector is connected to the bottom outlet of the outer hood of the present invention, and
These inner and outer hoods, movable hood, and rotary wire brush are mounted on a movable cart so that their heights can be adjusted.

(Function) To use the device of the present invention, the mobile cart is brought under the steel beam where asbestos is attached, and the open front part of the outer hood is connected to the web of the steel beam, and the open top part is connected to the upper flange of the steel beam. At the same time, the lower flange of the steel beam is inserted into one of the flange insertion slits on the front and rear surfaces of the outer hood, and the inner hood is brought into contact with the flange of the steel beam.

Then, the position of the movable hood is adjusted up and down to bring its upper side closer to the lower surface of the steel beam, thereby closing off the excess front opening of the outer hood that extends below the steel beam.

In this state, operate the suction device to vacuum the inside of the hood and rotate the wire brush to remove asbestos from the steel beams.

The stripped asbestos is trapped in the inner hood and does not scatter to the outside, and is also carried away by the air sucked in through the gap between the inner hood and the outer hood and discharged outside the machine through the suction duct from the outlet at the bottom of the outer hood. be done.

The moving trolley is moved forward along the length of the steel beam while stripping off asbestos in this way, and when it reaches the end of the steel beam, the wire brush is moved upwards or downwards to move the moving trolley back and remove the asbestos that is left behind. Rip it off as well. By repeating this forward and backward movement several times, all asbestos attached to the steel beams is removed.

The width of the web and the length of the seven lunges differ depending on the size of the steel beam, but by changing the vertical position of the movable hood and inserting the lower flange of the steel beam into the flange insertion slit at the corresponding position, the device of the present invention can be used. Steel beams of different sizes can be used as well.

(Example) Next, embodiments of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a self-propelled mobile trolley that can freely move forward and backward, and a base 3 is installed on it via a lift 2 that can be raised and lowered.

Reference numeral 4 denotes a moving frame formed by integrally connecting a vertical guide frame 4a and a horizontal saddle frame 4b, and the saddle frame 4b is provided with several sets of upper and lower idle wheels 5.

Then, a band-shaped guide rail 6 in the left and right direction is provided on the base 3, and this guide rail 6 is inserted between the upper and lower idle wheels 5,
A movable frame 4 is connected to a base 3 so as to be movable in the left-right direction with a guide rail 6 sandwiched between a pair of idle wheels 5. 7
is a frame moving hydraulic cylinder that moves the movable frame 4 along the guide rail 6.

A dustproof outer hood 8 is fixed to the upper part of the guide frame 4a. The outer hood 8 has a side surface facing the steel beam 9 (
It has an open top surface (left side in FIG. 1), and three flange insertion slits 10 into which the lower flange 9a of the steel beam 9 is slidably inserted are formed on its front and rear surfaces.

Inside the outer hood 8, a flexible inner hood 11 that comes into contact with the steel beam 9 is installed. The opening edge of the inner hood 11 that should be in contact with the steel beam 9 is covered with a brush 12 made of soft synthetic resin fiber.
It has a structure in which a rubber band plate 13 is superimposed on the steel beam 9, and when pressed against the surface of the steel beam 9, it bends and comes into close contact with the surface.

Note that if the brush 12 has a sufficiently high flocking density, the rubber band plate 13 can be omitted.

The inner hood 11 is fixed to the outer hood 8 along the side and upper opening edges of the opening, and forms a gap 14 between the inner hood 8 and the outer hood 8 for inhaling outside air. Further, in the inner tool 111 as well, a slit (not shown) into which the lower flange 9a of the steel beam 9 is inserted is formed in a cylindrical place corresponding to the flange insertion slit 10 of the outer hood 8.

A brush 10a is installed in these flange insertion slits 10 on the inside of the slit to, thereby closing the slit 10 so as to be openable and closable.

Next, reference numeral 15 denotes a rotary wire brush housed inside the inner hood 11, and as shown in an enlarged view in FIG.
5a, and eight rod-shaped brush portions 15b are arranged radially around the rotating shaft 16 adjacent thereto.

The outer diameter of this wire brush 15 is the web 9b of the steel beam 9.
The width is approximately equal to or at least does not exceed the width of the minimum standard.

The base end of the brush rotation shaft 16 slidably passes through a vertical through hole 17 formed in the machine wall of the outer hood 8 and is connected to a brush rotation motor 18 connected to the outside of the outer hood 8 . Then, two parallel guide grooves are formed inside the guide frame 4a,
A sliding plate 19 supporting the brush rotation motor 18 is fitted between both guide grooves. Reference numeral 21 denotes a brush lifting hydraulic cylinder installed on the guide frame 4a, and the tip of its telescoping rod is connected to one end of the sliding plate 19.

Reference numeral 22 denotes a movable hood provided on the outer periphery of the outer hood 8, which connects the open side portion of the outer hood 8 that should be viewed below the steel beam 9. A felt acid sealing material 23 is pasted vertically on the outer wall of the outer hood 8, so that the movable hood 2
The space between the movable hood 2 and the outer hood 8 is sealed regardless of the height of the movable hood 22.

A movable hood hydraulic cylinder 24 raises and lowers the movable hood 22 along the outer hood 8. 25 is movable hood 2
The slider 25 is slidably connected to a vertical guide pole 26 fixed to the outside of the outer hood 8, and the slider 25 is fixed to the outer hood 8 by expanding or contracting the cylinder 24.
The movable hood 22 is raised and lowered while following the guide ball 26.

A discharge port is opened at the bottom of the outer hood 8 and a suction duct 27 is connected thereto, and the other end of the duct 27 is connected to a drum 28 on the movable cart 1 for collecting asbestos.

The upper part of the drum 28 is further provided with a suction duct 27.
It is connected to a suction exhaust fan 32 via a cyclone 29 for dust collection, a bag filter 30 and a pre-filter 31.

However, to use the lever device, move the mobile trolley l to the asbestos A.
The height of the base 3 is adjusted using the lift 2, and the outer hood 8 is approached from the side of the steel beam 9 by driving the hydraulic cylinder 7 for moving the frame. Then, the opening edge of the inner hood 11 is brought into close contact with the steel beam 9, and the lower flange 9a of the steel beam 9 is inserted into the lower slit IO of the outer hood 8 as shown in FIG.

Next, the movable hood hydraulic cylinder 24 is driven to raise the movable hood 22, and the brush 22a provided on the upper opening edge of the movable hood 22 is raised.
is tightly attached to the lower surface of the lower flange 9a of the steel beam 9.

In this state, the motor 18 is started at %3, and while the wire brush 15 is rotated, the movable cart 1 is advanced along the length direction of the steel beam 9 from its starting end, and the upper surface of the web 9b of the steel beam 9 is Peel off the asbestos A on the bottom surface of the flange 9c.

Next, when the end of the steel beam 9 is reached, the brush lifting hydraulic cylinder 21 is driven to lower the brush rotating shaft 16, the motor 18, and the wire brush 15 a little, and this time, while moving the moving trolley l backward, the surface brush part 15a The asbestos A on the surface of the central part of the web 9b of the steel beam 9 is scraped off, and when it returns to the starting end of the steel beam 9, the hydraulic cylinder 21 for raising and lowering the brush is driven again to further lower the wire brush 15, and the movable trolley is moved. While moving forward again, asbestos adhering to the lower surface of the web 9b of the steel beam 9 and the upper surface of the lower flange portion 9a is removed (see FIG. 11).

In a small steel beam where the width of the web 9b is as narrow as the outer diameter of the wire brush 15, it is needless to say that it is sufficient to move the wire brush 15 along the steel beam once.

Asbestos on the lower surface of the lower flange will be removed separately.

During asbestos removal work using the wire brush 15, the suction device 32 is operated to suck outside air through the gap 14 between the inner and outer hoods 8 and 11, causing the scattered asbestos powder to collide with the inner hood 11 and leak to the outside. At the same time, this powder is carried by the airflow and is transferred from the bottom outlet of the outer hood 8 to the suction duct 27.
The speed of the airflow flowing through the zero gap 13, which is discharged through the drum 28 and collected into the drum can 28, is preferably X speed of 5 m/sec or more.

The discharged air is gradually filtered from the drum can 28 through a cyclone 29, a bag filter 30, and a pre-filter 31 to remove fine asbestos powder, and then released to the outside.

While the mobile trolley l is running, the hydraulic cylinder 7 for frame movement is operated to adjust the lateral positions of the inner and outer hoods 8.11, thereby preventing gaps from forming between the steel beams 9 and the inner hood 11. The wire brush 15 is pressed against the steel beam 9.

In this way, asbestos adhering to the steel beams 9 is removed, but generally a building consists of several types of steel beams of different sizes.
9 is used, so if the sizes are different, adjust the height of the base 3 to fit the outer hood 8 to the steel beam 9, and also adjust the upper and lower positions of the movable hood 22 to the width of the steel beam 9. Adjust accordingly.

12 and 13 are explanatory diagrams of this adjustment operation. In the case of a large steel beam with a wide web as shown in FIG. 12, the movable hood 22 is lowered, and in the case of a small steel beam with a narrow web as shown in FIG. 13, the movable hood 22 is raised. The outer hood 8 is provided with a plurality of slits 10 at heights corresponding to the dimensions of various steel beams when the upper surface opening is brought into contact with the upper 7 flange of the steel beam and the deck plate. Select the slit with the matching height and insert it.

A plurality of outer hoods 8 having different positions of the slits 10 may be prepared and replaced depending on the size of the steel beam.

The movable hood 22 may be a flat plate having the same area as the extra side opening of the outer hood 8.

The wire brush 15 may have an uneven surface to match the shape of the steel beam or deck plate.

It is even better if the mobile trolley l has a remote control unit.

(Effects of the Invention) In short, according to the present invention, a wire brush is installed on a moving cart and asbestos is removed using power, which greatly improves efficiency and saves labor compared to the conventional manual work using a spatula, etc. can be achieved.

In addition, since the outer periphery of the wire brush is covered with an inner hood and an outer hood, and the inside of both hoods is sucked and exhausted, there is no possibility that fine asbestos powder will leak outside and contaminate the surrounding environment. Improves work efficiency.

In addition, multiple flange insertion slits are drilled on the front and rear surfaces of the outer hood to accommodate steel beams of various sizes, and the movable hood connects the extra side openings of the outer hood that extend below the steel beams. Therefore, even if the steel beams have different sizes, their flanges can be inserted into any of the slits in the outer hood, and furthermore, when the movable hood is raised or lowered, the side openings of the outer hood can always be linked. Therefore, it is possible to remove asbestos from steel beams of various sizes with one device without any problems.

[Brief explanation of the drawing]

FIG. 1 is an overall front view of an asbestos removal device implementing the present invention.
Figure 2 is a right side view of Figure 1, Figure 3 is an explanatory diagram of the entire asbestos removal system with a suction exhaust fan connected to the device in Figure 1, and Figure 4 is an enlarged view of the main parts of Figure 1. 5 is a vertical sectional view thereof, FIG. 6 is a perspective view for explaining the inner and outer hoods of the device of the present invention, FIG. 7 is an enlarged sectional view of the main parts of the inner hood, and FIG. 8 is an outer hood. An enlarged front view of the main parts of the hood, Fig. 9 is a perspective view of the wire brush, Fig. 10 is a sectional view of a steel beam with asbestos attached, Fig. 11 is a process diagram of asbestos removal work using the device of the present invention, Fig. 12 and FIG. 13 are explanatory diagrams of work performed on steel beams of different sizes. 1 is a moving truck, 2 is a lift, 3 is a base, 4 is a moving frame, 7 is a hydraulic cylinder for the moving frame, 8 is an outer hood,
9 is a steel beam, 9a is a lower flange of the steel beam, 10 is a 7-lunge insertion slit, 11 is an inner hood, 14 is a gap, 15
18 is a wire brush, 18 is a brush rotation motor, 21 is a hydraulic cylinder for raising and lowering the brush, 22 is a movable hood, 24 is a hydraulic cylinder for movable hood, 27 is a suction duct, and 32 is a suction exhaust machine. Figure 4 Patent applicant Sato Kogyo Co., Ltd. (and one other person) agent
Hiroshi Kato (and 1 other person) and /LJ”n9 Figure Figure

Claims (1)

[Scope of Claims] An outer hood with open side and upper surfaces facing the steel beam is provided, and a plurality of flanges into which the flange portion of the steel beam is slidably inserted are inserted into the front and rear surfaces of the outer hood. A slit is bored, and a flexible inner hood that contacts the steel beam is connected to the inside of the outer hood, and a gap for outside air intake is formed between the inner and outer hoods, and a gap is formed inside the inner hood. An outer hood that accommodates a rotary wire brush and installs its brush rotation axis so that it can move up and down relative to the outer hood, and further connects a movable hood that can move up and down to the outer hood so as to extend below the steel beam. The side opening is closed off by this movable hood, and a suction duct is connected to the bottom outlet of the outer hood through a dust collector to a suction/exhaust fan, and these inner and outer hoods, movable hood, and wire brush are moved onto a moving trolley Asbestos removal equipment for steel beams that can be installed in a height-adjustable manner.