JPH10151568A - Shield device for blast work and working booth used for this device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shield device capable of carrying out blast processing without using a curing net, closely adhering it on a surface to be processed regardless of its shape, making itself into closed structure, preventing leakage of dust and decreasing noise and its booth in eliminating coating films, deposits or blots on surfaces of elevated bridges, buildings or the like. SOLUTION: A working booth 20 is fixed on an elevating unit 12 provided on a frame 10 supported and fixed on a working bucket 101. Only a surface making contact with a surface to be processed of the booth 20 is opened, other surfaces are all closed, a hood 40 free to expand and contact along each of head ends of left and right side walls, a top board and a bottom board forming an opened surface is installed, and its head end part can be moved by a driving mechanism. Additionally, a gun insertion hole 27 to install a blast gun is provided on a closed surface of the booth 20, and a suction collection device consisting of a suction chamber 71 for collection of attachments peeled off from the surface to be processed and a blast material is provided on a lower part in the inside of the booth 20 by partitioning it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to removal of paint films on viaducts, buildings, tunnels and other structures or structures, and removal of paint films on high places or large structures such as railway vehicles and aircraft bodies. The present invention relates to a shielding device used for blasting used for removing rust, exhaust gas, dirt from factory smoke, oily smoke, and the like, and a work booth used for the device.

[0002]

2. Description of the Related Art The outer surface of a steel or concrete structure or building is painted to improve its durability. If this coating film is used for a long time,
Under the influence of the environment such as climate, the coating film is damaged, peeled off, rusted or discolored.In addition, vehicle exhaust gas, factory smoke, oily smoke, etc. Has occurred. In many cases, repainting is performed as a countermeasure. Before repainting, the entire surface of the coating film is cleaned and polished for substrate adjustment. In the past, the removal of old paint film and rust removal (known as scraping or filing work) is generally performed by hand using a manual tool such as a scraper, a wire brush, a power brush, a disk sander, or a power tool. Was. However, there is a drawback that sufficient base adjustment cannot be performed at a protruding portion such as a narrow portion, a concave portion, a bolt, a rivet, and the like, and the work requires a long time and costs.

Meanwhile, in order to improve the seismic performance of viaducts on expressways and national roads, bridge piers of railway bridges, and concrete columns of existing buildings in the wake of the Great Hanshin-Awaji Earthquake, steel plates are wrapped around existing columns for reinforcement. Is being promoted in large cities and suburbs. In this bridge reinforcement work, in order to maintain the integrity of the iron plate and the existing columns, the paint film on the existing columns is peeled off, and then the gap between the existing columns and the iron plate is filled with adhesive. .

[0004] The above-mentioned seismic retrofitting work is usually performed at night when traffic is low, but the conventional scraping work using a scraper, a wire brush, a power brush, a disk sander and the like requires a great deal of labor. There is a problem that the work efficiency per hour is poor, a characteristic metal noise is generated due to the work, and the dust (dust) is remarkably scattered, and the area around the site is dirty widely.

[0005]

Recently, there has been an attempt to employ a blasting treatment using a scattering prevention net for peeling and rust removal of a coating film. However, there is the following problem in the method of blasting after curing the site on the net, and the solution is desired. Curing work in high places or places where the net is difficult to stretch,
It takes time and effort to withdraw the net after work. Since the curing net is fixed, only fixed point work is possible. The net does not have a sufficient hermetic structure, and dust may leak out from gaps. Dust is stuck in the net like smoke, and it is difficult to visually inspect the blast work surface. The noise is terrible.

In view of the above-mentioned conventional problems, the present inventor has devised a dust shielding device capable of performing blast processing without using a curing net and a booth used in the device. That is, the present invention is used in a blasting device that uses a special blasting bead (blast material) and sprays it with air pressure to peel and pulverize the coating film and / or foreign substances attached to the coating film. It is an object of the present invention to propose a shielding device capable of easily sucking and collecting the dust and the adhering substances and the beads for cleaning, which are separated and separated, and a work booth used in the device.

[0007] The present invention is intended for seismic retrofitting of bridges or for removing paint films, deposits, dirt, and the like on the surface of a structure or a building, the surface of which is to be treated is a column having a circular cross section, a column having a square cross section, and other corner portions. Even if there is R or the surface to be treated has irregularities, the work booth is closely adhered to the surface to be treated without choosing the shape of the surface to be treated, and the inside of the booth is sealed. It is an object of the present invention to propose a shielding device which can be structured to reduce dust leakage from a gap and reduce noise and a booth used for the device.

Further, according to the present invention, the blasting operation can be performed while moving even in a high place or a place where the net is difficult to be stretched, and while the dust scattered from the surface to be treated and rises like smoke is removed by suction, the surface to be treated is directly removed. It is an object of the present invention to propose a shielding device capable of performing blasting work while visually observing and a booth used for the device.

[0009]

Means for Solving the Problems In order to achieve the above object, the structure of the shielding apparatus of the present invention comprises the following steps: (a) mounted on a frame, a surface in contact with a surface to be processed is released, and all other surfaces are A closed work booth, and (b) a member provided along an edge of the open surface of the booth and attached to the surface to be processed so as to be in contact with the surface to be processed. A hood made of a flexible sheet member,
(C) a drive mechanism for moving the tip of the hood;
(D) a mounting portion for a blast gun provided on the closed surface of the booth, and (e) a collection duct for blast material and adhering matter separated from a surface to be processed provided at a lower portion inside the booth. And

The apparatus of the present invention comprises: (a) a frame that can be supported and fixed on a gondola, lifter, rolling tower, hanging scaffold, shelf scaffold, or the like; (b) an elevating unit provided on the frame; Fixed to the lifting unit,
A work booth in which a surface abutting on the surface to be processed is released and all other surfaces are closed; and (d) an elevating mechanism for lifting or lowering the booth with respect to a frame via the elevating unit. (E) telescopic hoods mounted along the left and right side walls forming the release surface of the booth, the top plate and the bottom plate, respectively.
(F) a contact member integrally attached to the tip of the hood so as to be able to come into close contact with the surface to be processed, and (g) a drive mechanism capable of bringing the contact member into contact with the surface to be processed. (H) a blast gun insertion hole provided on at least one of the back surface or both side surfaces of the booth, (i) a work monitoring window provided as a part of the booth, and (j) a partition at a lower portion inside the booth. A suction chamber for sucking and collecting the separated matter and the blast material, (k) a duct connected to the suction chamber, and (l) a suction and collection device for the matter and the blast material. It is a shielding device.

[0011] The monitoring window can be seen through from outside.
As an example, it is formed as a part of a work booth using a tempered glass or an acrylic plate or the like, and can be formed at a plurality of locations on the back surface or both side surfaces of the booth. The monitoring window is provided slightly above the center of the booth so that the blast work on the surface to be processed can be easily seen.

Also, the position of the insertion hole of the blast material spraying gun is set in consideration of the ease of the blast operation, similarly to the monitoring window. The shape of the insertion hole is appropriately set in consideration of the ease of insertion and movement of the gun, such as a rectangle, a circle, and an H shape.

A guide plate is provided in the work booth to define a work processing chamber and a suction chamber for sucking and collecting the adhering matter and blast material separated from the surface to be processed. It is preferable to provide a slit (gap) at the lower end of the inclined plate for communicating the processing chamber and the suction chamber. Also, below the booth, a duct connected to the suction room,
A suction and recovery device for adhering matter and blast material separated from the surface to be processed is provided.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view in which a part of the device of the present invention is cut away, and FIG. 2 is an explanatory diagram showing an example of a use state of the device.

FIG. 2 shows a situation in which the shielding device having the work booth of the present invention is applied to a concrete coating film peeling work on a pier of a highway bridge. In FIG. 2, reference numeral 100 denotes a work bucket 101 having a telescopic device.
1 shows an aerial work vehicle equipped with Reference numeral 102 denotes an elevated girder, and reference numeral 103 denotes a pier in a simplified manner. Note that the bucket 101 of the present embodiment is a support member for fixing the apparatus of the present invention.

FIG. 3 is a rear view of the shielding device, FIG. 4 is a top view thereof, and FIG. 5 is a bottom view. 1 and 3,
Reference numeral 10 denotes a frame provided with fixed hooks 11 for suspending the bucket 101 serving as a support member. Reference numeral 20 denotes a work booth fixed to the frame 10, and the booth 20 lifts up or It is attached to the lifting unit 12 configured to be able to lift down as follows.

That is, a pair of left and right holding arms 13 extend from the lifting unit 12 toward the front of the frame, and the work booth is fixed thereon. Incidentally, the lifting unit 12 is configured to control a lifting motor 15 provided at a lower portion of the frame 10 by a lifting control handle 16 and operate by a pair of lifting chains 17 driven by the lifting motor.

The work booth 20 comprises a back plate 21, both side walls 2
This is a kind of box-type booth composed of 2, 23, a top plate 24, and a bottom plate 25. The front surface of the booth is open in a divergent shape, and the other surfaces are closed. As an example, this booth uses a metal frame as a framework,
The frame is surrounded by a metal plate such as an aluminum material or a synthetic resin plate, is formed in a box shape of about 1 m in length and width, and has a sled-like leg 90 at the lower part of the booth. Although this booth is formed in a box shape, the booth is not limited to this, and may be formed in a cylindrical shape or any other suitable shape.

A back plate 2 located substantially at the center of the booth
1 and both side walls 22 and 23 are formed with insertion holes 26 and 27 for an air gun for blowing blast material. The insertion hole 26 of the blast material spraying air gun of the back plate 21 is horizontally long as an example, and the holes 27 and 28 of the side walls 22 and 23 are round as an example. Each is internally adhered with a rubber-like shielding material 29 from inside to prevent dust and blast material from leaking.

Further, monitoring windows 30, 31, and 32 for visually observing the blasting work from the outside are formed in the back plate portion 21 and the side wall portions 22 and 23 slightly above the center of the booth 20. A lighting window 33 is formed in the top panel. A monitor camera and lighting equipment may be provided inside the booth instead of or together with the monitoring window or the lighting window.

The front panel 34 of the booth 20 has a back plate 21,
A bellows-type hood 40 is attached integrally with the side walls 22, 23, the top plate 24, and the bottom plate 25. A brush or a contact member 41 having a cushioning function, such as a brush, having a function of absorbing an impact when the hood comes into contact with the surface to be processed is attached to the tip of the hood. The contact member 41 is attached via a link member 42 having a plurality of joints so that the contact member 41 can be brought into close contact with the shape of the surface to be processed. Details of the bellows-type hood 40 and the brush 41 are shown in FIGS.

A damper 50 and a central telescopic drive mechanism 51 composed of central cylinders CY1 and CY1 'are arranged above the top plate and the bottom plate of the booth 20, respectively. The bellows-type hood 40 can protrude forward from the center of the hood by the action of the lever 51 ′ and come into contact with the surface to be processed. In addition, two cylinders CY2, CY2 ', CY3, CY are provided above and below the left and right portions of the bellows type hood 40.
Left and right telescopic drive mechanisms 60 and 61 made of 3 ′ are provided.
2 attached. The left and right portions of the hood are protruded forward so that they can be brought into contact with the surface to be processed. A crank 62 is interposed between the levers of the outer cylinders CY2 and CY2 'and the link member 42.

Each of the cylinders is controlled by a hood expansion / contraction drive mechanism, and the hood 40 is moved in cooperation with a crank 62 by extending and contracting the expansion / contraction lever.
For example, bend in an arc shape as in
Bend, etc., displace the hood by stretching it appropriately, etc., and bend it if there is an R in the corner of the column with a circular cross section or a square cross section, or other corners of the column, or if the surface to be processed has irregularities Even if they are present, they can be brought into close contact with them according to their shapes.

A suction chamber 71 is formed in the lower part of the inside of the booth 20 for sucking and collecting the adhering substances separated by the blasting operation and the blast material. This suction chamber 71
Is provided with a downwardly inclined guide plate 70 at a lower portion, and a processing chamber 72 is provided above and sandwiched between the inclined guide plates 70, and has a substantially triangular shape for sucking and collecting adhered substances and blast material peeled downward. A cross section of the suction chamber 71 is formed, and a slit (gap) 73 for communicating the processing chamber 72 and the suction chamber 71 is provided at the lower end of the inclined guide plate. Reference numeral 74 denotes a collection duct for connecting the suction chamber 71 and the suction and collection device.

Here, handling of the blast device and the shielding device of the present invention will be briefly described with reference to FIGS. First,
As shown in FIG. 2, this device is fixed to the work bucket 101,
After the telescopic device and the elevating unit 12 set the required height and position, the central cylinders CY1, CY
1 'and left and right cylinders CY2, CY2', CY3, CY
By operating 3 ′, the bellows-type hood 40 is extended, and the brush or abutting member 41 at the hood tip is brought into close contact with the outer surface of the pier 103. Next, the blast gun 82 is inserted into the insertion holes 26, 27, 28 of the blast material spray gun of the booth 20. And from this blast gun, blasting beads (blast material) are sprayed into the booth 20 to pulverize and peel off the coating film and the attached matter on the surface to be processed.

In FIG. 9, beads for blasting (blast material) in a pressurized tank 80 pass through a blast hose 81 by pressurized air, and are directed toward a surface to be treated in the booth 20 closely attached to a pier or the like. The dust and the blasting beads (blast material) scattered from the surface to be processed while being jetted are guided to the suction chamber 71 through the slit 73 below the booth by the suction air from the blower 83, and further to the duct 7.
4 and is sent to the collecting device 85 while sucking through the vacuum hose 84.

In the blasting operation, the lifting booth 16 is appropriately adjusted to move the entire booth 20 to the frame 1
Lift up or down with respect to 0. Further, the bellows-type hood 40 is extended by a bellows expansion / contraction drive mechanism, the brush 41 at the tip of the hood 40 is brought into close contact with the outer surface of the pier, and the inside of the booth is hermetically sealed to perform the blasting operation. Dust that scatters from the surface to be treated and rises like smoke is sucked into the lower suction chamber 71 and collected from the duct 74. Therefore, the surface to be processed can be seen through the monitoring window, and the dust does not leak from the gap in the booth.

In the shielding device of the above embodiment, the frame 10 is fixed to the work bucket 101 of the aerial work vehicle, but is not limited to this. For example, gondola, lifter,
It can be fixed to a supporting member such as a rolling tower, a suspended scaffold, or a shelf scaffold or a main scaffold. Food 4
Numeral 0 is only required to be formed of a flexible sheet material, and does not need to be bellows-shaped, and may have a telescopic structure, for example.

[0029]

As described above, the present invention is applicable to seismic strengthening of buildings or structures and other work of peeling off paint film, removing rust or removing dirt, and has a circular cross section of the surface to be treated. Columns with square cross section, and R at corners
Even when there is an irregularity or when the surface to be processed has irregularities, the surface to be processed can be brought into close contact with them without depending on the shape of the surface.

Further, according to the present invention, the net curing operation becomes unnecessary, and the continuous blasting operation can be performed while moving the booth. No dust leaks out of the booth gap. Visual inspection of the surface to be blasted is easy from the monitoring window of the booth. Blasting work can be performed with low noise. And other excellent effects.

[Brief description of the drawings]

FIG. 1 is a side view showing a part of the apparatus of the present invention in a cutaway manner.

FIG. 2 is an explanatory diagram showing an example of a use state of the present apparatus.

FIG. 3 is a rear view of the present apparatus.

FIG. 4 is a top view of the present apparatus.

FIG. 5 is a bottom view of the present apparatus.

FIG. 6 is an explanatory diagram showing expansion and contraction of a bellows-type hood.

FIG. 7 is an enlarged sectional view of the same hood in a reduced state.

FIG. 8 is an explanatory diagram showing a contact state between a column having a circular cross section or a column having a square cross section and a hood.

FIG. 9 is a piping diagram of the blast device and the shielding device of the present invention.

[Explanation of symbols]

 Reference Signs List 10 frame 11 hook 12 elevating unit 13 holding arm 14 telescopic link 15 elevating motor 16 elevating handle 17 elevating chain 20 work booth 21 back surface 22, 23 side surface 24 top surface 25 bottom surface 26, 27, 28 gun insertion hole 29 paste inside 30, 31, 32, 33 Window 40 Hood 41 Contact member 42 Link member 50 Damper 51 Telescopic drive mechanism 60 Telescopic drive mechanism 62 Crank 70 Inclined guide plate 71 Suction chamber 72 Processing chamber 73 Slit 74 Duct 80 Pressure tank 81 Blast hose 82 Blast gun 83 Blower 84 Vacuum hose 85 Recovery device 90 Legs 100 Work vehicle 101 Work bucket 102 Elevator girder 103 Bridge pier

Claims (8)

[Claims] (A) a work booth attached to a frame and having a surface in contact with a surface to be processed released and all other surfaces closed; (b) a work booth having the released surface of the booth A hood made of a flexible sheet member provided along the edge and attached to the surface to be processed and attached to the surface to be processed; and (c) moving the tip of the hood. (D) a mounting portion of a blast gun provided on a closed surface of the booth; and (e) a collection duct for removing adhered matter and a blast material provided from a surface to be processed provided in a lower portion of the booth. Shielding device. (A) a surface which is in contact with a surface to be processed is released;
A work booth in which all other surfaces are closed; (b) a hood made of bellows members provided along an edge of the opened surface of the booth; and (c) a work surface. An abutting member integrally attached to the tip of the hood so as to oppose and attached so as to be able to make close contact with the surface to be processed; and (d) a drive mechanism for moving the tip of the hood; (E) a mounting portion of a blast gun provided on at least one of the back surface or both side surfaces of the booth; (f) a monitoring window provided as a part of the booth; and (g) a monitoring window provided in a lower portion inside the booth. (H) a shielding device comprising a duct for connecting the separated chamber and the suction / collection device for the blast material with the collected room and the blast material. 3. A frame that can be supported and fixed on a gondola, lifter, rolling tower, hanging scaffold, shelf scaffold, or the like; (b) an elevating unit provided on the frame; and (c) fixing on the elevating unit. A work booth in which a surface abutting on the surface to be processed is released and all other surfaces are closed; and (d) lifting and lowering the booth with respect to a frame via the lifting unit. (E) left and right side walls forming the release surface of the booth;
(G) a telescopic hood attached along each end of the top plate and the bottom plate; (f) a contact member integrally attached to the end of the hood so as to be able to come into close contact with the surface to be processed; ) A drive mechanism capable of bringing the contact member into contact with the surface to be processed; (h) an insertion hole for a blast gun provided on at least one of the back surface or both side surfaces of the booth; A work monitoring window provided as a part thereof; (j) a suction chamber partitioned at a lower portion inside the booth for suction and recovery of separated adhered matter and blast material; and (k) a duct connected to the suction chamber. (1) A shielding device comprising an adhering substance and a blast material suction / recovery device. 4. A booth for blast work in which a surface abutting on a surface to be processed is released and all other surfaces are closed, and a bellows provided along an edge of the released surface of the booth. A hood forming a mold; a brush-shaped abutment member that can be brought into close contact with the surface to be processed and is integrally attached to a tip of the hood so as to face the surface to be processed; A drive mechanism for extending and retracting a hood integral with the contact member; an insertion hole for a blast gun provided on at least one of the back surface or both side surfaces of the booth; a work monitoring window formed as a part of the booth; A suction chamber, separated by a guide at the lower portion of the booth, for suctioning and recovering the adhered material and the blast material separated from the surface to be processed, and connecting the suction chamber to the separated blast material and the blast material suction / recovery device. A work booth characterized by a duct for connection. 5. The monitor window is formed as a part of a booth using a transparent acrylic plate or tempered glass or the like, and is formed at a plurality of locations on the back surface or both side surfaces of the work booth. The work booth described in. 6. The work booth according to claim 4, wherein the insertion holes of the blast gun are formed at a plurality of locations on the back surface or both side surfaces of the work booth. 7. A work processing chamber and a suction chamber for sucking and collecting adhering matter and blast material separated from the surface to be processed are provided by forming a downward inclined plate at an inner lower portion of the work booth. 7. The work booth according to claim 4, wherein a slit (gap) that connects the work processing chamber and the suction chamber is provided at a lower end of the inclined plate. 8. 8. The work booth according to claim 4, wherein an illumination lamp is provided in the work processing room.