JPH11277437A - Blasting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the floating of a seal member from a wall surface due to the injection pressure of the grinding material by arranging an auxiliary seal means in an inner wall part of a main seal member or near there in a side to be ground by the grinding material from a grinding nozzle. SOLUTION: A lip part 7 is integrally formed with an inner wall part of a main seal member 5. The lip part 7 is extended from the inner wall part of the main seal member 5 inward of a space 20 so as to abut on the wall surface l, and a tip thereof is folded inward of the space 20 so as to be turned up. The lip part 7 is provided in the space 20 at a side, to which the grinding material is injected from a grinding material nozzle 6, namely, over from a side of a blast device 10 to a front side or a rear side thereof. With this structure, floating of the main seal member 5 from the wall surface 1 due to the injection pressure of the grinding material is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blasting apparatus that can move while maintaining a state of being attracted to a wall surface.

[0002]

2. Description of the Related Art As is well known, it is quite difficult to manually or manually clean the inner and outer walls and bottom of a ship, a high-rise building, or a large tank or the like, or adjust the substrate before painting. Things. Therefore, it is considered that these operations are performed automatically without relying on humans.
Various devices for this purpose have been proposed. For example, in Japanese Patent Publication No. 60-28715, basically, a casing that forms a space between the outer wall surface, wheels that drive the apparatus body, and a decompression space are defined in cooperation with the casing and the outer wall surface. An apparatus is disclosed that includes a seal and a pressure reducing source for discharging a fluid from a pressure reducing space, and is attached to a wall surface and moves along the wall surface.

In addition, Japanese Patent Publication No. 60-26752 discloses an apparatus provided with a mechanism for projecting and blasting an abrasive material onto a wall surface which moves by suction, in addition to this basic structure. According to the above-described apparatus, for example, an abrasive material such as a steel grid can be projected to remove dust and dirt on a wall surface and to peel an old coating film. Further, the present applicant has disclosed in Japanese Patent Application No. 7-252678 a polishing material nozzle for projecting a polishing material in addition to the above-described configuration.
A device was proposed in which one end side is opposed to a wall surface and is provided in a casing so as to be swingable, so that the abrasive can be uniformly projected over a wider range on the wall surface.

[0004]

By the way, in the case of cleaning the wall surface, generally, in order to perform a good cleaning process, the wall surface contained in the decompression space between the casing and the wall surface is compressed. It is necessary to project the abrasive material accelerated by air, but in the blast device, the projection of the abrasive material causes the inner wall of the sealing member sealing the depressurized space at the periphery of the casing. On the other hand, a projection pressure due to the pneumatic pressure of the compressed air and the collision pressure of the abrasive is applied. In a conventional blast device, the seal member may be instantaneously lifted from a wall surface by receiving a predetermined or higher projection pressure. In such a case, part of the abrasive material projected on the wall surface or the dust separated from the wall surface by the abrasive material jumps out of the casing from between the raised seal member and the wall surface, and the abrasive material is removed. The scavenging material cannot be collected well, resulting in environmental pollution due to dust.

The present invention has been made in view of the above technical problems, and has as its object to provide a blast device that prevents a seal member from floating from a wall surface due to a projection pressure of a polishing material.

[0006]

The invention according to claim 1 of the present invention (hereinafter referred to as the first invention) comprises a casing forming a space between a wall to be cleaned and a peripheral edge of the casing. A main seal member that is mounted on or in the vicinity thereof and hermetically seals a gap between the casing and the wall surface, one end side is open to the space, the other end side is connected to a decompression device, and one end side is the space. Facing the wall in the department,
In a blasting device having an abrasive material nozzle whose other end is connected to an abrasive material supply device, at least on the side where the abrasive material is projected by the abrasive nozzle in the space, the main seal member An auxiliary seal means is provided at or near the inner wall portion and is provided to prevent the main seal member from floating from the wall surface due to the projection pressure of the abrasive.

In the invention according to claim 2 of the present invention (hereinafter referred to as a second invention), a lip integrally formed on the inner wall of the main seal member is provided as the auxiliary sealing means. It is characterized by the following.

Further, in the invention according to claim 3 of the present invention (hereinafter referred to as a third invention), one end is fixed to the inner wall portion of the casing inside the main seal member as the auxiliary sealing means. The shielded seal provided is provided.

The invention according to claim 4 of the present invention (hereinafter referred to as a fourth invention) is characterized in that the closed space formed between the shield seal and the main seal member which is in close contact with the wall surface, It is characterized by being connected to an auxiliary pressure reducing device capable of adjusting the pressure in the closed space.

Further, the invention according to claim 5 of the present invention (hereinafter referred to as a fifth invention) is characterized in that the auxiliary sealing means is provided on the inner wall portion of the casing near the main seal member, the tip of which is the wall surface. The brush member is pressed through the elastic member.

The invention according to claim 6 of the present invention (hereinafter referred to as a sixth invention) is characterized in that the abrasive material nozzle can adjust the angle within a predetermined range in order to change the projection direction of the abrasive material. It is characterized by having.

Still further, according to a seventh aspect of the present invention (hereinafter, referred to as a seventh aspect), the apparatus main body is driven in a state in which the pressure reducing device is driven to reduce the pressure in the space through the pressure reducing passage. Moving means along the wall surface, the moving means comprising a wheel member rolling on the wall surface and a motor for rotating the wheel member. is there.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described.
This will be described in detail with reference to the accompanying drawings. Embodiment 1 FIG. FIG. 1 shows a state in which a blast device 10 according to Embodiment 1 of the present invention is attracted to a wall surface 1. FIG. 2 is a perspective view of the blast device 10 arranged on the wall surface 1. The blast device 10 includes:
The casing 3 is provided with a substantially conical casing 3. When the blasting device 10 is disposed on the wall surface 1, the casing 3 has a space 20 between the blast device 10 and the wall surface 1 as shown in FIG. 1.
Is formed. A main seal member 5 is mounted on a peripheral portion of a portion corresponding to the wall surface 1 of the casing 3, and the main seal member 5 hermetically seals between the peripheral portion of the casing 3 and the wall surface 1. .

The casing 3 is provided with a decompression passage 14 having one end opening to the space 20 and the other end communicating with a decompression device (not shown). Further, the casing 3 has an abrasive material nozzle 6 whose one end is opposed to the wall surface 1 and whose other end is connected to an abrasive supply device (not shown).
Is provided. As can be clearly understood from FIG. 1, the blasting device nozzle 6 is arranged such that one end thereof is substantially perpendicular to the wall surface 1 with the blast device 10 disposed on the wall surface 1. Mounted in position. As will be described in detail later, this abrasive material nozzle 6
The angle can be adjusted within a predetermined range while being held by a receiver 8 provided on the upper side of the casing 3, and the abrasive can be projected onto the predetermined angle range of the wall surface 1 included in the space 20. . Further, as shown in FIG.
Frame members 16A extending parallel to each other,
16B is attached, and these frame members 1
Wheel members 17A and 17B are provided in 6A and 16B, respectively. These wheel members 17A and 17B have drive motors 18A and 18B, respectively.

In a state where the blast device 10 is disposed on the wall surface 1, the pressure reducing device (not shown) is driven, and the space 2 is passed through a pressure reducing passage 14 communicating with the pressure reducing device.
By depressurizing the inside of 0, the blast device 10 main body can be adsorbed to the wall surface 1. At this time, between the wall surface 1 and the casing 3 via the main seal member 5 fastened and fixed to the peripheral edge of the casing 3 by the screw member 19,
The substantially closed space 20 is formed. FIG.
4 and FIG. 4 are an overall plan view of the main seal member 5 and a cross-sectional explanatory view of the main seal member 5 in a state of being in close contact with the wall surface 1, respectively. The main seal member 5 has a substantially circular shape corresponding to the periphery of the substantially conical casing 3. The main seal member 5 is made of a non-breathable, flexible material, and the adhesion to the wall surface 1 is improved as the space 20 is depressurized. Then, even when the wall surface 1 has fine irregularities, the abdomen of the main seal member 5 closely adheres to the wall surface 1 while flexibly corresponding to the irregularities,
Similarly, a sufficient sealed state can be ensured.

In this embodiment, as can be clearly seen from FIG. 4, a lip 7 is integrally formed on the inner wall of the main seal member 5. The lip portion 7 extends from the inner wall portion of the main seal member 5 to the inside of the space portion 20 and abuts on the wall surface 1, and is folded back so that the tip thereof is directed upward toward the inside of the space portion 20. ing. The lip portion 7 is, on the side where the abrasive material is projected from the abrasive material nozzle 6 in the space portion 20, that is, in the present embodiment, the side of the blast device 10 (the left and right sides in FIG. 3). From the front side to the rear side. Here, the blast device 10 by the moving means is used.
With reference to the traveling direction, the side facing the traveling direction is the front side, the opposite side is the rear side, and the side facing the direction perpendicular to the traveling direction is the lateral side.

The lip portion 7 is made of a non-breathable and flexible material similarly to the main seal member 5. The inner surface is in close contact with the wall surface 1 and shields the contact surface between the wall surface 1 and the main seal member 5 and its vicinity. Thereby, the contact surface of the wall surface 1 and the main seal member 5 is protected from the projection pressure of the abrasive material. In this embodiment, the provision of such a lip portion 7 prevents the main seal member 5 to be in close contact with the wall surface from being lifted off the wall surface 1 by the projection pressure of the abrasive material, and separates from the abrasive material or the wall surface. This prevents the generated dust from passing between the main seal member 5 and the wall surface 1 and jumping out of the casing 3. Further, in this embodiment, since the lip portion 7 is integrally formed with the main seal member 5, the main seal member 5 can be easily handled when assembling the blast device 10, and the number of steps for attaching to the casing 3 increases. Absent.

With the blast device 10 adsorbed on the wall surface 1, the abrasive material accelerated by compressed air is projected from the abrasive material nozzle 6 toward the wall surface 1. A part of the surface of the cleaning material nozzle 6 is formed in a spherical shape.
A receiver 8 having a shape corresponding to the spherical portion 6a is provided on the casing 3 side, and holds the spherical portion 6a of the abrasive material nozzle 6 with respect to the casing 3. In order to ensure airtightness between the abrasive material nozzle 6 and its receiver 8, a seal (not shown) is provided on the contact surface between the two members. In the present embodiment, as the abrasive material projected from the abrasive material nozzle 6, for example, 0.5 to
0.7 mmφ steel grit was used.

As can be clearly understood from FIG. 2, in the blasting apparatus 10 according to the present embodiment, a motor 9 is installed outside the casing 3 adjacent to the above-mentioned abrasive material nozzle 6, and the output of the motor 9 One end of a link member 12 is connected to a disk-shaped eccentric adapter 11 attached to a shaft. The other end of the link member 12 has a holder 13 for holding the abrasive material nozzle 6 outside the casing 3.
It is connected to. The nozzle holder 13 is attached to the casing 3 so as to be rotatable around a fulcrum 13a. By driving the motor 9, the link member 1 is connected via the eccentric adapter 11.
2 is driven in the axial direction, whereby the holding member 13 rotates about the fulcrum 13a. As a result, the abrasive material nozzle 6 swings right and left, and the projection direction of the abrasive material on the wall surface 1 changes. It is supposed to be. In the present embodiment, the blasting material nozzle 6 swings along a direction perpendicular to the traveling direction of the blast device 10 main body. in this way,
By attaching the above-mentioned abrasive material nozzle 6 to the casing 3 so as to be swingable, it is possible to project the abrasive material on the wall surface 1 in a wider range. The abrasive material projected from the abrasive material nozzle 6 into the space portion 20 and colliding with the wall surface 1 is sucked and collected through the pressure reducing passage 14 by the pressure reducing device (not shown).

In a state where the blast device 10 is attracted to the wall surface 1, the wall surface 1 is cleaned, and in the present embodiment, the drive motors 18A, 18B are driven, and the respective wheel members 17A, 17B are moved to the wall surface. By driving the blast device 10 on the wall 1, the blast device 10 can be moved along the wall surface 1. Here, since the blast device 10 can move while adsorbing to the wall surface 1, the drive motors 18A, 1
The power of the wheel members 17A and 17B driven by 8B is compared with the friction force acting between the wall surface 1 and the main seal member 5,
The frictional force acting between the wall surface 1 and the wheel members 17A, 17B is set to be larger. As described above, in the present embodiment, the blast device 10 is self-propelledly moved along the wall surface 1, and the entire wall surface 1 is sequentially blasted.

Embodiment 2 FIG. Next, the structure of the main seal member 25 and its vicinity in the blast device according to Embodiment 2 of the present invention will be described. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and further description is omitted. 5 and 6 are a plan view showing the entirety of the main seal member 25 in the blast device, and a cross-sectional explanatory view of the main seal member 25 in a state of being in close contact with the wall surface 1, respectively. The main seal member 25 has a substantially circular shape corresponding to the peripheral edge of the substantially conical casing 33, and is fastened and fixed to the peripheral edge of the casing 33 by the screw member 19. The main seal member 25 is made of a non-breathable and flexible material, and the adhesion to the wall surface 1 is enhanced as the space 20 is depressurized. And
Even when the wall surface 1 has fine irregularities, the abdomen of the main seal member 35 closely adheres to the wall surface 1 while flexibly corresponding to the irregularities, and a sufficient sealed state can be similarly secured.

In this embodiment, as can be clearly seen from FIG. 6, a shield made of a non-breathable and flexible material like the main seal member 25 is provided on the inner wall of the casing 23 near the main seal member 25. The seal 27 is fastened and fixed with a screw member 29. The shielding seal 27 extends from the inner wall of the casing 23 to the inside of the space 20 and abuts on the wall surface 1, and is folded back so that its tip is directed upward toward the inside of the space 20. . The shielding seal 27 is formed in a substantially circular shape corresponding to the main seal member 25, and is arranged along the main seal member 25 in the space 20. Furthermore, in this embodiment, the main seal member 25, the shielding seal 27, the wall surface 1, the casing 2
A through-hole 35 is provided in the peripheral space 40 formed between the first through-hole 3 and the second through-hole 3. The through-hole 35 communicates through a joint member 38 to an auxiliary pressure reducing device (not shown) capable of adjusting the pressure in the closed peripheral space 40.

When the blasting apparatus main body is attracted to the wall surface 1, the shielding seal 27 is attached to the main sealing member 2.
Inside 5, it is in close contact with wall surface 1. At this time, by driving the auxiliary pressure reducing device, for example, the peripheral space 40
Is set to be lower than the pressure of the space 20 on the inner side thereof, the adhesion of the shielding seal 27 and the main seal member 25 to the wall surface 1 can be increased. As described above, when the shielding seal 27 is in close contact with the wall surface 1, the wall surface 1 and the main seal member 25 are closed.
Of the main seal member 25 is protected from the projection pressure accompanying the projection of the abrasive material.

As described above, in this embodiment, by providing such a shielding seal 27, it is possible to prevent the main seal member 25 to be in close contact with the wall surface 1 from rising from the wall surface 1 by the projection pressure of the abrasive. This prevents the abrasive material or dust separated by the abrasive material from jumping out of the casing 23 after passing between the main seal member 25 and the wall surface 1. Further, by driving the auxiliary pressure reducing device to increase the adhesion of the shielding seal 27 and the main seal member 25 to the wall surface 1, the main seal member 25 rises from the wall surface 1 by the projection pressure of the abrasive. This can be prevented more reliably.

Embodiment 3 Next, the structure of the main seal member 45 and the vicinity thereof in the blast device according to Embodiment 3 of the present invention will be described. FIG. 7 and FIG.
3A and 3B are a plan view showing the entirety of the main seal member 45 and a cross-sectional explanatory view of the main seal member 45 in a state of being in close contact with the wall surface 1, respectively. The main seal member 45 is made of a non-breathable and flexible material, and has a substantially circular shape corresponding to the peripheral portion of the substantially conical casing 43, as in the case of the second embodiment. It is fastened and fixed to the periphery by a screw member 19.

In this embodiment, as can be clearly understood from FIG. 8, a brush member 47 is attached to the inner wall portion of the casing 43 near the main seal member 45 via a spring member 48 having a U-shaped cross section. Have been. The brush member 47 is fastened and fixed to the lower end of a spring member 48 fastened to the casing 43 by a screw member 49 using a screw member 51. The brush member 47 is located in the space 20 on the side where the abrasive is projected from the abrasive nozzle 6, that is, on the side of the blast device 10 (FIG. 7).
Are arranged from the left and right sides) to the front side and the rear side.

In a state where the blast device main body is attracted to the wall surface 1, the tip of the brush member 47 is pressed against the wall surface 1 by the elastic force of the spring member 48 inside the main seal member 45. Can be Thus, when the brush member 47 is pressed against the wall surface 1,
The close contact surface between the wall surface 1 and the main seal member 45 and the vicinity thereof are shielded, so that the close contact surface between the wall surface 1 and the main seal member 45 is protected from the projection pressure accompanying the projection of the abrasive. In this embodiment, by providing such a brush member 47, the main seal member 45 is prevented from floating from the wall surface 1 due to the projection pressure of the abrasive material, and is separated from the wall surface by the abrasive material and the abrasive material. The dust is prevented from passing through the space between the main seal member 45 and the wall surface 1 and jumping out of the casing 43.

It should be noted that the present invention is not limited to the above-exemplified embodiment, and it is needless to say that various improvements or design changes can be made without departing from the gist of the present invention.

[0029]

According to the first aspect of the present invention, the main seal is provided at least on the side where the abrasive is projected by the abrasive nozzle into the space formed between the wall surface to be cleaned and the casing. Auxiliary sealing means which is disposed at or near the inner wall portion of the member and can be in close contact with the wall surface in the space portion is provided, so that the main seal member is prevented from floating from the wall surface due to the projection pressure of the abrasive. In addition, it is possible to prevent dust removed from the abrasive material or the wall surface from passing through the space between the main seal member and the wall surface and jumping out of the casing.

According to the second aspect of the present invention, as the auxiliary sealing means, the lip portion is integrally formed on the inner wall portion of the main seal member, and the main seal member rises from the wall surface by the projection pressure of the abrasive. Is prevented.
It is possible to prevent dust removed from the abrasive material or the wall surface from passing through the space between the main seal member and the wall surface and jumping out of the casing.

Further, according to the third aspect of the present invention, as the auxiliary sealing means, a shielding seal is provided on the inner wall of the casing along the main sealing member, and the main sealing member projects the abrasive material. Since it is prevented from rising from the wall surface due to the pressure, it is possible to prevent the abrasive material or dust separated from the wall surface from passing through the space between the main seal member and the wall surface and jumping out of the casing.

Further, according to the fourth aspect of the present invention, it is possible to adjust the pressure in the space formed between the wall surface, the main seal member and the shielding seal by driving the auxiliary pressure reducing device. By setting the pressure in the space to be lower than the pressure in the space to which the blast material is supplied, it is possible to enhance the adhesion of the shielding seal and the main seal member to the wall surface. In this case, it is possible to more reliably prevent the main seal member from rising from the wall surface due to the projection pressure of the abrasive.

According to the fifth aspect of the present invention, a brush member pressed against the wall surface is provided on the inner wall portion of the casing via the elastic member near the main seal member.
Since the main seal member is prevented from rising from the wall surface due to the projection pressure of the abrasive material, dust separated from the abrasive material or the wall surface passes between the main seal member and the wall surface and jumps out of the casing. Can be avoided.

Further, according to the sixth aspect of the present invention, since the abrasive material nozzle is movable and the projection direction can be adjusted in angle, by changing the projection direction during the abrasive material projection,
A wider range can be cleaned on the wall surface in the space.

Still further, according to the seventh aspect of the present invention, since the blast device includes a moving means including a wheel member and a drive motor for driving the wheel member,
It is possible to move smoothly on the wall in a self-propelled manner.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view of a blast device according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view showing a state where the blast device is arranged on a wall surface.

FIG. 3 is a plan view showing the entire main seal member in the blast device.

FIG. 4 is an explanatory partial cross-sectional view showing a structure of the main seal member and its vicinity.

FIG. 5 is a plan view showing the entire main seal member in the blast device according to Embodiment 2 of the present invention.

FIG. 6 is a partial cross-sectional explanatory view showing a main seal member according to the second embodiment and a structure in the vicinity thereof;

FIG. 7 is a plan view showing an entire main seal member in a blast device according to Embodiment 3 of the present invention.

FIG. 8 is a partial sectional explanatory view showing a main seal member according to the third embodiment and a structure in the vicinity thereof;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wall surface 3,23,43 ... Casing 5, 25, 45 ... Main seal member 6 ... Abrasive material nozzle 7 ... Lip part 9 ... Nozzle swing motor 10 ... Blasting device 14 ... Pressure reducing passage 17A, 17B ... Wheel member 18A , 18B ... drive motor 20 ... space part 27 ... shielding seal 47 ... brush member 48 ... spring member

Claims (7)

[Claims] 1. A casing forming a space between a wall to be cleaned and a main seal member mounted on or near a peripheral edge of the casing to hermetically seal a gap between the casing and the wall. One end side is open to the space, the other end side is a decompression passage communicating with the decompression device, and one end side is opposed to the wall surface in the space part, and the other end is connected to the polishing material supply device with the abrasive material nozzle. In the blasting device, in the space, at least on the side where the abrasive is projected by the abrasive nozzle, disposed at or near the inner wall portion of the main seal member, and the projection pressure of the abrasive A blasting device provided with auxiliary sealing means for preventing the main seal member from rising from the wall surface. 2. The blast device according to claim 1, wherein a lip portion integrally formed on an inner wall portion of the main seal member is provided as the auxiliary sealing means. 3. The blast device according to claim 1, wherein a shielding seal having one end fixed to an inner wall portion of the casing is provided inside the main sealing member as the auxiliary sealing means. . 4. A method according to claim 1, wherein the closed space formed between the shielding seal and the main seal member, which is in close contact with the wall surface, communicates with an auxiliary pressure reducing device capable of adjusting the pressure in the closed space. The blast device according to claim 3, wherein 5. A brush member, whose tip is pressed against the wall surface, is attached to an inner wall portion of the casing in the vicinity of the main seal member via an elastic member as the auxiliary sealing means. The blasting device according to claim 1, wherein 6. The cleaning material nozzle according to claim 1, wherein an angle of the polishing material nozzle can be adjusted within a predetermined range in order to change a projection direction of the polishing material. Blast equipment. 7. A moving means for driving the pressure reducing device to move the apparatus main body along the wall surface in a state where the pressure in the space is reduced through the pressure reducing passage, wherein the moving means is provided on the wall surface. The blast device according to any one of claims 1 to 6, comprising a wheel member that rolls upward and a motor that rotationally drives the wheel member.