JP2003001563A - Hood type blasting surface treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize and lighten a blasting surface treatment apparatus capable of removing painted films of a steel structure easily. SOLUTION: In the bottom face 4a of the hood 4 having the inserting hole 8 at its back end face to which the blasting nozzle 2 can be inserted, the discharge opening 11 to discharge the abrasives jetted from the blasting nozzle 2 and the removed paint films downward by gravity is provided. The bottom face 4a of the hood 4 is formed to slope downward gradually toward the discharge opening 11 so that the abrasives and the removed paint films are led to the discharge opening 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hood type blasting apparatus for removing a coating film by injecting an abrasive on a painted wall surface.

[0002]

2. Description of the Related Art Conventionally, a blasting device has been used to remove a coating material which has been applied to the wall surface of a steel structure and has deteriorated due to long-term use, and has peeled or cracked, to perform ground treatment. Was used.

As a conventional blasting apparatus, a blasting machine comprising a blast nozzle for injecting an abrasive, a hood provided to cover the periphery of the blast nozzle, and a suction device having a suction hose connected to the hood. A processor was provided.

The operation of the blast treatment device will be described with the target steel structure as a chimney barrel. Reference numeral 2 in FIGS. 7 and 8
Reference numeral 0 is a painted barrel. The tubular body 20 is covered with a curing sheet B around it. A work scaffold 21 is attached to the barrel 20, and a gondola 23 is suspended by a wire 22. The gondola 23 moves the barrel 20 up and down along the wall surface by the wire 22. And, these cylinder body 20, scaffold 21
A protective net C for covering the gondola 23 and the fall and removal of the removed coating film is stretched around the gondola 23.

When carrying out the work, the suction device of the blast treatment device is installed on the scaffold 21 or the gondola 23, and the hood provided so as to cover the periphery of the blast nozzle is pressed against the wall surface A of the barrel body 20 to blast. The abrasive is sprayed from the nozzle onto the wall surface A. Then, the abrasive collides with the wall surface A and the coating film is peeled off from the wall surface A.

The removed coating film that has been stripped off and the used abrasive material are sucked and collected from the hood through the suction hose into the suction device.

[0007]

However, in the above-mentioned blast treatment device, since the removal coating film received in the hood and the used abrasive are sucked by the suction device and discharged to the outside of the hood, the scaffold 21 or The gondola 23 needs a place to install the suction device, which makes it difficult to secure a foothold for the worker and may hinder the safety of the worker. Further, the device becomes large in scale, and a great deal of time and labor is required for moving the blast processing device on the scaffold 21 or for mounting and lowering it on the gondola 23.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a compact and lightweight blast treatment apparatus capable of removing a coating film of a structure extremely easily.

[0009]

In order to achieve the above object, a hood type blasting device according to claim 1 is provided with a blast nozzle for injecting sand or a steel shaving abrasive, and a part of the blast nozzle. It has a box shape and has a hood into which a blast nozzle is inserted from one end, and the opening of the hood is brought into contact with the painted wall surface, the abrasive is sprayed from the blast nozzle, and the coating film is applied from the wall surface. A blast treatment device for removing, characterized in that the hood has a discharge port formed on its lower surface, and the lower surface is inclined downward toward the discharge port.

That is, when the opening of the hood is brought into close contact with the painted wall surface and the abrasive is sprayed from the blast nozzle toward the wall, the removed coating film peeled off from the wall and the used abrasive are the hood. Since it is received inside, is moved toward the discharge port on the lower surface, and is naturally discharged below the discharge port, it is not necessary to provide a suction device, and the manufacturing cost can be reduced. In addition, since the suction device has been removed, the device is smaller and lighter, and the worker's foothold is secured.
The safety of the operator can be achieved, and the blast treatment device can be easily moved.

According to a second aspect of the present invention, there is provided a hood type blasting apparatus, wherein an opening portion of the hood is provided with a wheel which is brought into contact with the wall surface and a magnet which attracts the hood to the wall surface. Therefore, since the hood is attracted to the wall surface by the magnet, it is not necessary to manually press and hold the hood against the wall surface during work. Further, since the hood is attached to the wall surface by the magnet, the hood is moved vertically, horizontally and circumferentially of the wall surface, so that it is possible to continuously blast the coated surface while moving the hood. Become.

The hood type blast treatment device according to a third aspect is characterized in that the hood is supported on the wall surface side of a gondola movably installed along the wall surface.
In other words, when blasting the wall surface, the hood supported by the gondola can be applied to the wall surface, and when moving the gondola, the hood can be moved away from the wall surface and moved with the gondola, so efficient work is possible. Become.

According to a fourth aspect of the present invention, there is provided a hood type blasting apparatus, wherein the hood is supported by the gondola by a slide mechanism so as to be able to approach and separate from the wall surface. Therefore, the work of moving the hood close to and away from the wall surface is simplified, and the work can be facilitated.

The hood type blasting apparatus according to the fifth aspect is characterized in that the hood has an exhaust plate made of a mesh having a mesh size smaller than that of the abrasive.
Therefore, the air and the like sprayed from the blast nozzle together with the abrasive are exhausted through the exhaust plate made of mesh, so that the inside of the hood is kept at normal pressure and the normal blasting process can be performed.

In the hood type blasting apparatus according to the sixth aspect, the hood has an insertion opening at one end thereof through which the blast nozzle can be inserted while being held.
In other words, the operator grips the blast nozzle with his / her hand and moves the direction in which the blast nozzle faces in the hood to the left / right and up / down, whereby the wall surface in contact with the opening of the hood can be uniformly blasted.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION A hood type blasting apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 in FIGS. 1 and 2 denotes a hood type blasting apparatus according to the first embodiment of the present invention. This hood type blasting apparatus 1 is composed of a blast nozzle 2 for injecting sand or a steel shaving abrasive, and a box-shaped hood 4 having an opening 3 that abuts on a wall surface A that has been painted.

As shown in the figure, moving wheels 5 and magnets 6 for attracting the hood 4 to the wall surface A are provided at the four outer corners of the opening 3. The magnet 6 is provided so as to form a gap with respect to the wall surface A when the opening 3 is attracted to the wall surface A. As a result, the hood 4 can be moved along the wall surface 4 by the wheel 5 while the opening portion 3 is attached to the wall surface A. Also,
A rubber sheet 7 is attached to the inner peripheral surface of the hood 4.
The rubber sheet 7 functions as a shock absorbing material so that the abrasive material does not collide with the hood 4 and the hood 4 is not damaged. Further, a sealing rubber sheet 7a is provided on the periphery of the opening 3 of the hood 4, and the opening 3 of the hood 4 is brought into close contact with the wall surface A by the rubber sheet 7a.

An insertion opening 8 is formed on the rear end surface of the hood 4 which faces the opening 3. A rubber seal 9 having a cut is attached to the insertion port 8, and the blast nozzle 2 is grasped and inserted from the cut of the rubber seal 9. The rubber seal 9 is in close contact with the blast nozzle 2 while the blast nozzle 2 is gripped, and prevents the abrasive from leaking and scattering from the insertion port 8.

The upper surface of the hood 4 is composed of an exhaust plate 10 whose part is made of mesh. This exhaust plate 10
The mesh size is about 0.5 mm, which is smaller than the particle size of the abrasive so that the abrasive does not leak and scatter.

The lower surface 4a of the hood 4 has a discharge port 11 formed substantially in the center thereof, and the entire lower surface 4a is inclined downward toward the discharge port 11.

The upper portion of the gondola 23, which will be described later, is
As shown in FIG. 2, a rail 12 is provided, and a balancer 13 for canceling the own weight of the hood 4 is movably supported on the rail 12, and the hood 4 is hung on the balancer 13 via a wire 14. There is.

Next, a case where the hood type blasting apparatus 1 having the above structure is mounted on the gondola 23 to perform blasting will be described with reference to FIG.

First, the hood type blasting apparatus 1 is moved to the wall surface A for blasting.

After moving to the wall surface A to be blasted, as shown in FIG. 3, the opening 5 of the hood 4 is directed to the wall surface A, the wheel 5 is brought into contact with the wall surface A, and the attraction force of the magnet 6 is applied. Attach the hood 4 to the wall surface A. Next, the blast nozzle 2 is grasped and inserted through the cut of the rubber sheet 9 provided in the insertion opening 8 and is directed toward the wall surface A.

Then, the abrasive material 26 is supplied from the supply hose 24 to the blast nozzle 2, and the abrasive material 26 is vigorously jetted onto the wall surface A from the blast nozzle 2.

Then, the abrasive 26 collides with the wall surface A,
The coating film is stripped from the wall surface A. The removed coating film 27 that has been stripped off and the abrasive 26 that has collided with the wall surface A bounces back into the hood 4, then loses its momentum and falls onto the lower surface 4 a of the hood 4. The abrasive 26 and the removed coating film 27 that have dropped onto the lower surface 4a of the hood 4 move to the discharge port 11 along the inclination of the lower surface 4a. Abrasive material 26 collected in the outlet 11 and the removed coating film 2
7 naturally falls from the discharge port 11 and is discharged downward, and is collected by the baccan 28 placed on the lower scaffold 21 through the recovery hose 25 connected to the discharge port 11.

On the other hand, from the blast nozzle 2, the abrasive 26
The air injected together with the air is exhausted from the exhaust plate 10 of the hood 4.

The tip of the blast nozzle 2 is moved to move the hood 4
After the inner wall surface A is uniformly blasted, the hood 4 is manually pushed while the opening 3 of the hood 4 is in close contact with the wall surface A, the hood 4 is moved by the wheels 5, and the blast processing of the wall surface A is continued.

The one shown in FIG. 4 is the gondola 2 described above.
3 shows an example in which a recovery receiver 29 is provided, and the recovery receiver 29 receives the abrasive material 26 and the removed coating film 27 discharged from the discharge port 11 of the hood 4, and the pipe 29A below the same. It is adapted to be collected by the vacant 28 via the. Thereby, the weight of the hood 4 can be further reduced, and the working efficiency can be further improved.

As described above, according to the hood type blasting apparatus of the first embodiment, the used abrasive material 26 and the removed coating film 27 received on the lower surface 4a of the hood 4 are
It is moved to the discharge port 11 along the slope of the lower surface 4a, and is naturally dropped below the discharge port 11 to be discharged, passed through the recovery hose 25, and recovered by the bacchan 28. That is, it is not necessary to install a suction device for sucking the used abrasive material 26 and the removed coating film 27 received by the hood 4, and the facility cost can be reduced. Further, since the suction device is eliminated, the device is reduced in size and weight, the scaffolding of the worker can be ensured, the safety of the worker can be ensured, and the work of mounting the device on the gondola 23 becomes easy.

Further, the hood 4 is attracted to the wall surface A by the magnet 6 provided in the opening 3, and is moved along the wall surface A by the wheels 5 also provided in the opening 3, so that the hood 4 can be held by hand. Thus, it is possible to save the labor of pressing and holding the wall surface A, and it is possible to continuously blast the wall surface A while moving the hood 4.

Moreover, the blast nozzle 2 to the abrasive 26
The air injected together is exhausted through the exhaust plate 10 and the inside of the hood 4 is kept at normal pressure, so that normal blast treatment can be performed.

Further, since the hood 4 is provided with an insertion port 8 into which the blast nozzle 2 can be inserted while being gripped, the direction in which the blast nozzle 2 faces can be set to the left and right in the hood 4.
It can be moved up and down, and the wall surface A is uniformly blasted in the hood 4.

(Second Embodiment) Next, the structure of the hood type blasting apparatus of the second embodiment will be described with reference to FIGS. 5 and 6. In addition, the same reference numerals are given to the same structural portions as those of the first embodiment, and the description thereof will be omitted. 5 and 6
The reference numeral 30 is the hood type blast processing device of the second embodiment. The hood 31 of the hood type blast treatment device 30 is supported by the gondola 23 by the slide mechanism 32 with the opening 3 facing the wall surface A. The width of the hood 31 is formed to be substantially the same as the width of the gondola 23.

The slide mechanism 32 is provided on both side surfaces of the gondola 23 and has long guide plates 33 supported orthogonal to the wall surface A, and these guide plates 33, respectively.
Long hole 34 formed along the longitudinal direction of the guide plate 33
And a plurality of slide rods 35 welded to the side surface of the hood 31 and inserted into the long holes 34 of the guide plate 33.
The hood 31 is slid along the guide plate 33 by the slide mechanism 32, so that the hood 31 is supported movably in the approaching / separating direction with respect to the wall surface A.

Support rods 38 are provided at the four corners of the opening 3 of the hood 31. A handle 39 is attached to the support rod 38, and wheels 5 for movement are provided at the tip of the handle 39. And the handle 39
When is turned, the wheel 5 moves in the approaching / separating direction with respect to the wall surface A, so that the distance d between the wall surface A and the magnet 6 can be adjusted.

In order to perform the blast treatment using the hood type blast treatment device having the above structure, as in the first embodiment,
The opening 3 of the hood 31 faces the wall surface A, and the wheels 5 are placed on the wall surface A.
And the hood 4 is attached to the wall surface A by the attractive force of the magnet 6. Next, the blast nozzle 2 is grasped and inserted through the cut of the rubber sheet 9 provided in the insertion opening 8 and is directed toward the wall surface A.

Then, the abrasive material 26 is supplied from the supply hose 24 to the blast nozzle 2, and the abrasive material 26 is vigorously jetted from the blast nozzle 2 onto the wall surface A.

Then, as in the first embodiment, the abrasive 2
6 collides with the wall surface A, and the coating film is peeled off from the wall surface A. The removed coating film 27 that has been stripped off and the abrasive material 26 that has collided with the wall surface A are bounced back into the hood 31, then lose momentum and fall onto the lower surface 4 a of the hood 31. Lower surface 4 of hood 31
The abrasive 26 and the removed coating film 27 that have fallen to a move to the discharge port 11 along the slope of the lower surface 4a. The abrasive 26 and the removed coating film 27 collected in the discharge port 11 are naturally dropped from the discharge port 11 and discharged downward, and are collected through the recovery hose 25 to the baccan 28 placed on the lower scaffold 21. It

On the other hand, from the blast nozzle 2, the abrasive 26
The air injected together with the air is exhausted from the exhaust plate 10 of the hood 31.

While holding the blast nozzle 2, the inside of the insertion opening 7 is moved horizontally to uniformly blast the wall surface A in the hood 31, and when the blast processing is completed, the slide mechanism 32 separates the hood 31 from the wall surface A. , The gondola 23 is moved, and the wall surface A is further blasted.

In the case of this hood type blast treatment device, the handle 39 is turned to move the gap d between the magnet 6 and the wall surface A.
By expanding, the hood 31 becomes easier to separate from the wall surface A, and the movement of the hood 31 by the slide mechanism 32 becomes easier.

According to the hood type blast treatment device,
The used abrasive material 26 and the removed coating film 27 received on the lower surface 4a of the hood 31 are moved to the discharge port 11 along the slope of the lower surface 4a, and are naturally dropped below the discharge port 11 and discharged. The recovery hose 25 is passed through and the vacant 28
Will be collected. That is, it is not necessary to install a suction device for sucking the used abrasive material 26 and the removed coating film 27 received by the hood 31, and the facility cost can be reduced. In addition, since the suction device has been eliminated, the device is smaller and lighter, ensuring a foothold for workers,
The worker's safety can be improved.

Further, since the hood 31 is supported on the wall surface A side of the gondola 23 installed so as to be movable along the wall surface A, when the wall surface A is blasted, the hood 3 is used.
When 1 is applied to the wall surface A and the gondola 23 is moved,
The hood 31 can be moved away from the wall surface A and can be moved together with the gondola 23, which enables efficient work. Furthermore, since the hood 31 is supported by the slide mechanism 32 so as to be able to approach and separate from the wall surface A, the hood 31
The work of moving the wall closer to and away from the wall surface A is simplified, and the work can be facilitated.

Further, since the magnet 6 for attracting the hood 31 to the wall surface A is provided in the opening 3 of the hood 31, the hood 31 is attached to the wall surface A by the magnet 6, and the hood 31 is manually wall-mounted during the work. There is no need to press it against A and hold it.

Further, since the moving wheel 5 is provided at the opening 3 of the hood 31, the hood 31 is provided with a magnet 6.
With this, the wheels 5 can be moved in the up-down direction of the wall surface A together with the gondola 23 while being adsorbed on the wall surface A, and the wall surface A can be continuously blasted while the hood 31 is moved.

Further, since the hood 31 is provided with the insertion port 7 into which the blast nozzle 2 can be inserted while being held, by moving the direction in which the blast nozzle 2 faces in the horizontal direction of the insertion port 7, The wall surface A having a length substantially the same as the lateral width of the gondola 23 can be blasted.

[0049]

As described above, according to the hood type blasting apparatus of the present invention, the following effects can be obtained. According to the hood type blasting apparatus of claim 1, the blast nozzle is peeled off from the wall surface by injecting the abrasive material toward the wall surface with the opening portion of the hood being in close contact with the painted wall surface. It is not necessary to install a suction device because the removed coating film and the used abrasive material are received in the hood, moved toward the discharge port on the lower surface, and are naturally dropped below the discharge port to be discharged. The manufacturing cost can be reduced. Further, since the suction device is eliminated, the device is reduced in size and weight, the operator's foothold can be secured, the worker's safety can be improved, and the device can be easily moved.

According to the hood type blasting apparatus of the second aspect, the hood opening is provided with the wheels that are brought into contact with the wall surface and the magnet that attracts the hood to the wall surface. There is no need to press and hold against the wall by hand. Further, since the hood is moved along the wall surface by the wheels while being attached to the wall surface by the magnet, it is possible to continuously blast the coated surface while moving the hood.

According to the hood type blasting apparatus of the third aspect, since the hood is supported on the wall surface side of the gondola movably installed along the wall surface, when the wall surface is blasted, the gondola is blasted. When moving the gondola by pressing the hood supported by the wall against the wall, you can move the hood away from the wall and move it with the gondola.
Efficient work is possible.

According to the hood type blasting apparatus of the fourth aspect, since the hood is supported by the slide mechanism so as to be able to approach and separate from the wall surface, the work of bringing the hood into and away from the wall surface is simple. Therefore, the work can be facilitated.

According to the hood type blasting apparatus of the fifth aspect, the air and the like sprayed together with the abrasive from the blast nozzle are exhausted through the exhaust plate to keep the inside of the hood at a normal pressure. It can be performed.

According to the hood type blast treatment device of the sixth aspect, since the one end of the hood has an insertion port into which the blast nozzle can be inserted while being held, an operator holds the blast nozzle by hand. By moving the direction of the blast nozzle in the hood to the left and right and up and down, the wall surface can be uniformly blasted in the hood.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a hood type blast treatment device for explaining a hood type blast treatment device of a first embodiment example of the present invention.

FIG. 2 is a front view of the hood type blasting apparatus for explaining the hood type blasting apparatus of the first embodiment of the present invention.

FIG. 3 is a side view of a work site for explaining work performed by the hood type blasting apparatus according to the first embodiment of the present invention.

FIG. 4 is a side view at a work site for explaining a modified example of the hood type blast treatment device according to the first embodiment of the present invention.

FIG. 5 is a side view of the hood type blasting apparatus for explaining the hood type blasting apparatus of the second embodiment of the present invention.

FIG. 6 is a front view of the hood type blasting apparatus for explaining the hood type blasting apparatus of the second embodiment of the present invention.

FIG. 7 is a side view at the work site for explaining the work of the coating film of the chimney.

FIG. 8 is a plan view at the work site for explaining the work of the coating film of the chimney.

[Explanation of symbols]

1,30 Hood type blast treatment device 2 blast nozzle 3 openings 4,31 hood 4a lower surface 5 wheels 6 magnets 9 insertion slot 10 Exhaust plate 11 outlet 23 Gondola 26 Abrasive 32 slide mechanism A wall surface

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shigeo Inoue             4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture               Mitsubishi Heavy Industries Ltd. Hiroshima Research Center (72) Inventor Eiji Kato             5-34-6 Shiba, Minato-ku, Tokyo Mitsubishi Heavy Industries             Inside the corporation

Claims (6)

[Claims] 1. A blast nozzle for injecting sand or steel shavings, a hood having a box shape with a partial opening, and a hood into which the blast nozzle is inserted from one end. A blast treatment device for bringing an opening of the hood into contact with a wall surface, injecting the abrasive from the blast nozzle, and removing a coating film from the wall surface, wherein the hood has a discharge port on its lower surface. A hood type blasting device, wherein the hood is formed and the lower surface is inclined downward toward the discharge port. 2. The hood type according to claim 1, wherein the opening of the hood is provided with a wheel that abuts against the wall surface and a magnet that attracts the hood to the wall surface. Blast processing equipment. 3. The hood type blast treatment device according to claim 1, wherein the hood is supported on the wall surface side of a gondola movably installed along the wall surface. 4. The hood is formed by a slide mechanism,
The hood-type blast treatment device according to claim 3, wherein the hood type blast treatment device is supported by the gondola so as to be close to and away from the wall surface. 5. The hood-type blast treatment device according to claim 1, wherein the hood has an exhaust plate made of a mesh having a mesh size smaller than that of the abrasive. . 6. The hood type blast treatment device according to claim 1, wherein the hood has an insertion opening at one end thereof that can be inserted while gripping the blast nozzle.