JP7359589B2 - Asbestos removal and recovery equipment - Google Patents

Description

The present invention relates to an asbestos removal and recovery device.

BACKGROUND ART Conventionally, coating material stripping devices have been invented that strip coating materials such as asbestos coated on walls of structures.

Patent Document 1 describes a coating material stripping device that can be held with one hand and uses compressed air as a power source, rotates a rotating body, and peels off coating materials by applying the polished surface of the rotating body to a wall surface. has been done.
This coating material stripping device is provided with a rotating body and a cover that covers the polished area on the wall surface. This coating material removal device is equipped with a water supply port that injects water into the space covered by the cover, and by moistening the peeled off powder and wall surfaces in the space, the peeling powder is dispersed. is suppressed. This coating material stripping device is provided with an outlet for sucking muddy water mixed with peeling powder and water in the space, and can collect the muddy water to a predetermined location. A water supply tube that supplies water to the water supply port and an air supply hose that supplies compressed air that serves as a driving source to the air motor are separately provided.

Japanese Patent Application Publication No. 2018-59394

The coating material stripping device described in Patent Document 1 uses compressed air as a power source and water as a medium for preventing scattering and collecting stripping powder. Therefore, as described above, this coating material stripping device requires two types of systems: a compressed air supply system and a water supply and recovery system. Therefore, since two types of hoses, a water supply tube and an air supply hose, are provided, when carrying out work by holding the coating material stripping device by hand, there is a problem that the hoses are difficult to separate and work efficiency is reduced. Moreover, since this coating material stripping device requires two types of systems, the scale is large and the cost is likely to increase.

In view of the above circumstances, an object of the present invention is to provide an asbestos removal and recovery device that has good workability, is small in scale, and low in cost.

The present invention is an asbestos removal and recovery device that removes and recovers asbestos-containing walls, and includes a housing, a rotary cutter that cuts the asbestos-containing wall, and a rotating shaft that is supported by the housing, and a rotary cutter that cuts the asbestos-containing wall. a pressurized water supply channel for supplying pressurized water that applies rotational force; a cover having an opening and covering the rotary cutter and the cutting location; and a water jet stream branching from the pressurized water supply channel and communicating with a space inside the cover. and a suction section that communicates with the space inside the cover and creates a negative pressure inside the cover with the edge of the opening of the cover in close contact with the asbestos-containing wall, and the water jet flow path , branching from the return side flow path of the pressurized water supply flow path .

According to the present invention, since both the power source of the rotary cutter and the medium for preventing scattering and recovering the removed asbestos are water, the power source and the medium can be supplied and recovered in one system. . Therefore, the number of hoses connected to the asbestos removal and recovery device can be reduced, making it easier to separate the hoses and improving work efficiency. In addition, since water as a power source can be used as a medium for preventing and recovering asbestos, the flow path within the device can be easily configured, making it possible to reduce the scale and cost of asbestos removal and recovery devices. It is possible.

Furthermore, according to the present invention, the pressurized water in the return flow path after applying the driving force to the rotary cutter becomes a medium for preventing and recovering asbestos, so that the pressurized water can be used without reducing the driving force of the rotary cutter. Water can be efficiently injected into the cover by using the water in the supply channel.

The asbestos removal and recovery device of the present invention has good workability, is small in scale, and low in cost.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the asbestos removal and recovery apparatus based on 1st embodiment of this invention. It is a right side view showing the same asbestos removal and recovery device. It is a back view showing the same asbestos removal and recovery device. It is a front view showing a state where the movable cover of the same asbestos removal and collection device is opened. It is a right side view showing a state where the movable cover of the same asbestos removal and recovery device is opened. FIG. 2 is a right side view showing a state in which the asbestos removal and recovery device is equipped with a removable cover. FIG. 3 is a rear view showing a state in which the asbestos removal and recovery device is equipped with a removable cover.

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 7.
The asbestos removal and recovery device 1 according to the first embodiment of the present invention is a device used to cut and remove asbestos-containing structural materials on the walls of structures, and further recover them. used in contact. As shown in FIGS. 1 and 2, the asbestos removal and recovery device 1 includes a housing 2, a rotary cutter 3, a pressurized water supply channel 4, a cover 5, a water jet channel 6, a suction section 7, Equipped with.
Here, in the asbestos removal and recovery apparatus 1, the side where the rotary cutter 3 is exposed will be referred to as the back surface, and the opposite side will be referred to as the front surface, and the left and right direction will be described when looking from the back surface side to the front side.

The housing 2 includes a handle portion 21 and a main body portion 23. The handle portion 21 includes a cylindrical portion 211 and an operating portion 217.

The cylindrical portion 211 is formed into a substantially rectangular cylindrical shape. A partition insertion portion 213 is formed on the side surface on the back side of the cylindrical portion 211, and a fulcrum portion 214 is provided. A cylinder lid part 215 having a hole is provided at the base end 21a of the cylinder part 211.

The partition insertion portion 213 is formed by removing, for example, a cylindrical shape, and communicates the hollow portion of the cylindrical portion 211 with the outside.

The fulcrum portion 214 is provided closer to the proximal end 21a of the cylindrical portion 211 than the partition insertion portion 213 is. The fulcrum portion 214 is provided with the plate surfaces of two plate-like members facing each other, and a fulcrum portion through hole 21c is formed that passes through the plate surfaces from side to side. The fulcrum portion through hole 21c is formed with an axis perpendicular to the plate surface of the fulcrum portion 214 as a central axis.

The operating section 217 includes a handle 218, a lever plate 219, and a partition 220. The handle 218 is attached to the base end 21d of the lever plate 219.

A lever plate through hole 21f that penetrates the plate surface of the lever plate 219 from side to side is formed between the base end 21d and the tip 21e of the lever plate 219. The lever plate through hole 21f is formed with an axis perpendicular to the plate surface of the lever plate 219 as its central axis, and has the same diameter as the fulcrum portion through hole 21c of the fulcrum portion 214. An elliptical through hole 21g is formed on the tip end 21e side of the lever plate 219, with the center axis being an axis perpendicular to the plate surface of the lever plate 219.

The partition 220 includes a shaft portion 221, a water passage portion 222, a spring 225, and a connecting shaft 226. The shaft portion 221 has a cylindrical shape, for example, and has a diameter smaller than the diameter of the partition insertion portion 213 of the cylindrical portion 211 . The shaft portion 221 fits inside the partition insertion portion 213 of the cylindrical portion 211 and is slidable with respect to the partition insertion portion 213.

The water passage portion 222 is provided at the tip 21h of the shaft portion 221. The water passage section 222 is a rectangular parallelepiped member and includes a flow path forming section 223 and a water stop section 224 . The flow path forming portion 223 is provided on the opposite side from the tip 21h, and has a cylindrical flow path hole 21j formed therein. The axis of the channel hole 21j is parallel to the axis of the cylindrical portion 211. The water stop portion 224 is provided closer to the tip 21h than the channel hole 21j.

The spring 225 is provided to surround the shaft portion 221 and to be in contact with the inner surface of the handle portion 21 and one end of the water passage portion 222 .

The connecting shaft 226 is provided near the base end 21i of the shaft portion 221, and has a cylindrical shape that projects in one direction in the left-right direction. The diameter of the connecting shaft 226 is smaller than the short axis of the elliptical through hole 21g of the lever plate 219. The partition 220 is connected to the lever plate 219 by passing the connecting shaft 226 through the oval through hole 21g of the lever plate 219.

By making the lever plate through hole 21f of the lever plate 219 and the fulcrum part through hole 21c of the cylinder part 211 have the same axis using a hinge pin (not shown), the lever plate 219 can pass through the lever plate through hole 21f and the fulcrum part through hole 21c. It is arranged rotatably around the axis of the hole 21c.

The main body section 23 includes a substantially cylindrical cylindrical section 231 and a main body lid section 232 provided at the base end 23a of the cylindrical section 231. The cylindrical portion 231 has a communication port 23c on the circumferential surface near the base end 23a. The main body part 23 is connected to the tip 21b of the cylindrical part 211 of the handle part 21. The hollow portion of the main body portion 23 communicates with the hollow portion of the handle portion 21 via the communication port 23c.

The rotary cutter 3 includes a rotating shaft 31, a gear 32, a rotating body 33, and a cutter bit 34.

The rotating shaft 31 has a cylindrical shape and has reduced diameter portions 311 having a small diameter at both ends. The rotating shaft 31 is supported within the main body portion 23 of the housing 2 so as to be rotatable around an axial center line O by a supporting member such as a bearing (not shown).

The gear 32 has a hollow portion 32a formed around the center line L in the axial direction. The diameter of the hollow portion 32a is approximately the same as the diameter of the reduced diameter portion 311 of the rotating shaft 31, and is larger than the diameter of the reduced diameter portion 311. The gear 32 is fitted onto the rotating shaft 31 by passing one of the reduced diameter parts 311 through the hollow part 32a. Further, for example, by fitting uneven portions (not shown) provided in the hollow portion 32a and the reduced diameter portion 311, the rotating shaft 31 is locked to the gear 32, and rotation around the axis of the gear 32 is prevented. The rotating shaft 31 follows and rotates.

For example, the gear 32 is fixed to the rotating shaft 31 by fastening a bolt to a bolt hole provided in the reduced diameter portion 311 in the axial direction, thereby being pressed down by the head of the bolt. The gear 32 may be provided integrally with the rotating shaft 31.

The rotating body 33 includes a bottom portion 331 and a slope portion 332. The bottom portion 331 is a disk and has a hollow portion 33c formed around the centerline M in the axial direction. The slope portion 332 has a cylindrical shape, and a base end 33 a is connected to the circumferential surface of the bottom surface portion 331 . The inner diameter of the slope portion 332 increases as it moves away from the bottom portion along the axial direction.

The rotating body 33 is externally fitted onto the rotating shaft 31 by passing one of the reduced diameter portions 311 of the rotating shaft 31 into which the gear 32 is fitted through the hollow portion 33c. Further, for example, by fitting uneven portions (not shown) provided in the hollow portion 32a and the reduced diameter portion 311, respectively, the rotating shaft 31 is locked to the rotating body 33, and the rotating shaft 31 is rotated around the axis. The rotating body 33 follows and rotates.

For example, the rotating body 33 is fixed to the rotating shaft 31 by fastening a bolt to a bolt hole provided in the reduced diameter portion 311 in the axial direction, thereby being pressed down by the head of the bolt. The rotating body 33 may be provided integrally with the rotating shaft 31. The rotating body 33 is disposed on the back side of the tip 23b of the cylindrical portion 231 of the main body 23 and is exposed from the cylindrical portion 231.

The cutter bit 34 is made of hard metal, has a substantially rectangular parallelepiped shape, and has a recess 34a formed on one surface. The depression 34a has a substantially triangular prism shape. The cutter bit 34 is fixed to the rotating body 33 at a constant interval by welding the surface opposite to the surface on which the recess 34a is formed to the tip 33b of the slope portion 332 of the rotating body 33.

The pressurized water supply channel 4 includes a supply channel 41, a load section 42, and a return channel 43.

The supply side flow path 41 has a substantially cylindrical shape, and a base end 41 a is located outside the housing 2 from the base end 21 a of the cylindrical portion 211 of the housing 2 . The base end 41a is connected to the tip of a water supply hose (not shown). The supply side flow path 41 passes through the hollow portion of the cylinder portion 211 and extends to the main body portion 23 . The supply side flow path 41 extends to the vicinity of the gear 32 of the rotary cutter 3. The supply side flow path 41 is supported by the cylindrical portion 211 by a support member (not shown).

The supply side flow path 41 has an intermittent part 41c in the middle of the cylindrical part 211. The intermittent portion 41c is formed to sandwich the water passage portion 222 of the partition 220. The intermittent portion 41c overlaps the water stop portion 224 of the water passage portion 222 when no external force is applied to the handle 218 of the operation portion 217. A seal member (not shown) is provided in the gap between the intermittent portion 41c and the water passage portion 222.

The load section 42 has a cylindrical shape with a cavity 42a inside, and includes a load section through hole 42b, a supply port 421, a return port 422, a supply pipe 423, and a return pipe 424. The load portion through hole 42b is formed on the back side of the load portion 42 by removing the cylindrical shape. The load portion through hole 42b is larger in diameter than the rotating shaft 31 of the rotary cutter 3, and the rotating shaft 31 is inserted therethrough, and the gear 32 of the rotary cutter 3 is disposed in the cavity 42a. A sealing member (not shown) is provided in the gap between the load portion through hole 42b and the rotating shaft 31. The load section 42 is supported by the main body section 23 of the housing 2 by a support member (not shown).

The edge of the supply port 421 and the distal end 42c of the supply pipe 423 are joined, the distal end 41b of the supply side flow path 41 and the base end 42d of the supply pipe 423 are joined, and the hollow portion of the cavity 42a and the supply side flow path 41 is joined. are in communication. The edge of the return port 422 and the base end 42e of the return pipe 424 are joined.

The return side flow path 43 has a substantially cylindrical shape, a base end 43a is joined to a distal end 42f of a return pipe 424, and a hollow portion communicates with a cavity 42a of the load section 42. The tip 43b is located on the outside of the housing 2 from the base end 21a of the cylindrical portion 211 of the housing 2. The tip 43b is connected to the base end of a water return hose (not shown). The return side flow path 43 is supported by the cylindrical portion 211 by a support member (not shown).

The return side flow path 43 has a branch port 431 in the middle of the cylindrical portion 211 . The branch port 431 is formed by removing a cylindrical shape from the circumferential surface of the return side flow path 43, and communicates the outside of the return side flow path 43 with the flow path side.

The supply side flow path 41, the load section 42, and the return side flow path 43 of the pressurized water supply flow path 4 may be provided integrally.

The cover 5 includes a fixed cover 51, a movable cover 52, and a removable cover 53.

The fixed cover 51 includes a first upper plate 511 and a first side wall 512.
The first upper plate 511 has a substantially disk shape, and has a hollow portion 51a formed around the center line N in the axial direction. The diameter of the hollow portion 51a is larger than the diameter of the rotating shaft 31 of the rotary cutter 3, and the hollow portion 51a is fitted onto the rotating shaft 31. A sealing member (not shown) is provided in the gap between the hollow portion 51a and the rotating shaft 31.

The radius of the first upper plate 511 is larger than the radius of the rotating body 33 of the rotary cutter 3. The first upper plate 511 is elastically fixed to the tip 23b of the cylindrical portion 231 of the housing 2 by a spring or the like (not shown).

The first upper plate 511 has a cut portion 51b that is cut linearly along the plate surface at a position apart from the central axis N by a certain length.

The first upper plate 511 has an injection port 51c at a position away from the center line N. The injection port 51c is formed by removing the cylindrical shape from the first upper plate 511, and allows the front side and the back side of the first upper plate 511 to communicate with each other.

The first side wall 512 protrudes from the end of the first upper plate 511 toward the back side. The first side wall 512 protrudes from the cut portion 51b of the first upper plate 511 to a height higher than the tip 33b of the rotating body 33 of the rotary cutter 3 on the front side. The first side wall 512 protrudes from other than the cut portion 51b to a height near the tip 33b of the rotating body 33.

The first side wall 512 has a suction port 51d at a position other than the cut portion 51b. The suction port 51d has a substantially cylindrical shape.

The distance of the inner surface of the first side wall 512 at the position of the cut portion 51b from the center line O of the rotary cutter 3 is equivalent to the radius of the outer periphery of the tip 33b of the rotary body 33. The first side wall 512 includes a plate-shaped removable cover fixing portion 513 extending toward the center line O at the tip 51e at a position other than the cut portion 51b. A bolt hole 51f is formed in the detachable cover fixing portion 513.

The movable cover 52 includes a rotation fulcrum 521, a second upper plate 522, and a second side wall 523.
The rotation fulcrum portion 521 has a ring shape. The inner diameter of the center hole 52a of the rotation fulcrum 521 is larger than the diameter of the rotation shaft 31 of the rotary cutter 3, and the rotation fulcrum 521 is rotatably fitted around the rotation shaft 31.

The second upper plate 522 has a base end 52b connected to the rotation fulcrum 521, and the width increases as the position moves away from the central axis of the rotation fulcrum 521. The tip 52c of the second upper plate 522 has an arc shape, and the radius is larger than the radius of the first upper plate 511 of the fixed cover 51. The chord of the second upper plate 522 is longer than the cut portion 51b.

The movable cover 52 is provided so that it can be fixed by a fixing member (not shown) in a closed position that covers the cut portion 51b and an open position that exposes the cut portion 51b. FIG. 4 shows the movable cover 52 in an open state. FIG. 5 shows the movable cover 52 in an open state.

The second side wall 523 protrudes from the end of the second upper plate 522 toward the back side. The second side wall 523 protrudes to a height near the tip 33b of the rotating body 33 of the rotary cutter 3. The distance of the inner surface of the second side wall 523 from the center line O of the rotary cutter 3 is equivalent to the distance from the center line O of the outer periphery of the first side wall 512 at a position other than the cut portion 51b of the fixed cover 51.

As shown in FIGS. 6 and 7, the removable cover 53 includes a horizontal plate 531 and a vertical plate 532.
The horizontal plate 531 is a substantially rectangular parallelepiped, and a bolt hole 53a is formed near one end.
The vertical plate 532 is approximately a rectangular parallelepiped. The vertical plate 532 is provided at an end of the horizontal plate 531 opposite to the end where the bolt hole 53a is formed, and protrudes perpendicularly to the surface of the horizontal plate 531.

When attached, the removable cover 53 is fixed to the fixed cover 51 by passing bolts B through the bolt holes 53a and the bolt holes 51f of the fixed cover 51. When the detachable cover 53 is attached, the horizontal plate 531 is attached so as not to face the fixed cover 51.

The cover 5 forms an opening with the edge of the tip 51e of the fixed cover 51, the tip 52d of the movable cover 52, or the vertical plate 532 of the detachable cover 53.

The water injection channel 6 includes, for example, a cylindrical pipe 61 and a hose 62. The base end 61a of the tube 61 is joined to the edge of the branch port 431 of the return side flow path 43, and the hollow portion of the tube 61 and the hollow portion of the return side flow path 43 communicate with each other. The distal end 61b of the tube 61 is connected to the proximal end 62a of the hose 62, and the hollow portion of the tube 61 and the hollow portion of the hose 62 communicate with each other. The tip 62b of the hose 62 and the edge of the injection port 51c of the fixed cover 51 are joined, and the hollow part of the hose 62 and the space on the back side of the fixed cover 51 communicate with each other.

The suction part 7 has a substantially cylindrical shape. The base end 7a of the suction part 7 is joined to the edge of the suction port 51d of the cover 5, and the hollow part of the suction part 7 and the space on the back side of the cover 5 communicate with each other. The tip 7b of the suction part 7 is connected to the base end of a water return hose (not shown). The water return hose is equipped with a suction device.

Next, a method of removing and recovering asbestos-containing walls using the asbestos removal and recovery device 1 will be described.

The user first starts supplying water to the water supply hose. Water supplied from the water supply hose flows into the supply side flow path 41 of the pressurized water supply flow path 4, but is stopped by the water stop portion 224 of the partition 220 at the intermittent portion 41c.

The user holds the asbestos removal and recovery device 1 in his hand by placing his thumb on the front side of the cylindrical portion 211 of the handle portion 21 and placing his remaining fingers on the back side of the handle 218. Furthermore, with the hand opposite to the hand holding the asbestos removal and recovery device 1, the movable cover 52 of the cover 5 is fixed in a position covering the cut portion 51b of the fixed cover 51.

The user brings the cutter bit 34 of the rotary cutter 3, the tip 51e of the first side wall 512 of the fixed cover 51, and the tip 52d of the second side wall 523 of the movable cover 52 into close contact with the asbestos-containing wall. By bringing the tip 51e of the first side wall 512 of the fixed cover 51 and the tip 52d of the second side wall 523 of the movable cover 52 into close contact with the asbestos-containing wall, the area to be cut is covered by the fixed cover 51 and the movable cover 52. be exposed. By activating the suction device of the water return hose connected to the suction port 51d of the cover 5, the space covered by the cover 5 is made to have a negative pressure.

The user grasps the handle 218 and pulls it toward the front. When the handle 218 is pulled toward the front side, the lever plate 219 attached to the handle 218 rotates about the fulcrum through hole 21c of the fulcrum 214 of the housing 2 as a fulcrum. When the lever plate 219 rotates, the partition 220 connected to the lever plate 219 overcomes the restoring force of the spring 225 of the partition 220 and is pulled toward the back side.

As the partition 220 is pulled to the back side, the channel hole 21j of the channel forming part 223 of the partition 220 moves to the back side, and the channel hole 21j communicates with the hollow part of the supply side channel 41. By communicating between the channel hole 21j and the hollow portion of the supply-side channel 41, water that has been blocked by the water stop portion 224 of the partition 220 flows through the supply-side channel 41 over the partition 220.

The water that has flowed through the supply side channel 41 over the partition 220 flows into the load section 42 of the pressurized water supply channel 4 . The water that has flowed into the load section 42 applies pressure to the teeth of the gear 32 of the rotary cutter 3, giving rotational force to the gear 32. By applying rotational force to the gear 32, the rotating shaft 31 fixed to the gear 32 rotates, and the rotating body 33 fixed to the rotating shaft 31 rotates. As the rotating body 33 rotates, the cutter bit 34 fixed to the rotating body 33 rotates, and the asbestos-containing wall in close contact with the cutter bit 34 is cut.

The water that has flowed into the load section 42 applies pressure to the teeth of the gear 32 to rotate the gear 32, and then exits the load section 42 and flows out into the return side channel 43 of the pressurized water supply channel 4. A part of the water that has flowed into the return side flow path 43 passes through a branch port 431 formed in the return side flow path 43 and flows out into the water jet flow path 6 . The water flowing into the water injection flow path 6 passes through the pipe 61, the hose 62, and the injection port 51c of the fixed cover 51, and is injected into the space covered by the cover 5 and the asbestos-containing wall. Further, among the water that has flowed into the return side flow path 43, other water that does not flow out into the water jet flow path 6 is returned to the water return hose.

The water injected into the space covered by the cover 5 and the asbestos-containing wall contains the cut asbestos-containing wall and becomes muddy water. The muddy water passes through the suction port 51d of the fixed cover 51, flows out into the suction part 7, and is taken into the water return hose.

When cutting an asbestos-containing wall at a corner near a structure that is at an angle with the asbestos-containing wall, such as a corner between the asbestos-containing wall and the ceiling, the movable cover 52 and the cut portion 51b of the fixed cover 51 are exposed. Fixed in position. Furthermore, by bringing the first side wall 512 of the cut portion 51b of the fixed cover 51 into close contact with a structure having an angle with the asbestos-containing wall, the fixed cover 51, the asbestos-containing wall, and the structure having an angle with the asbestos-containing wall, Cover the area to be cut.

By bringing the first side wall 512 of the cut portion 51b into close contact with a structure having an angle with the asbestos-containing wall, the tip 33b of the rotating body 33 to which the cutter bit 34 is bonded can be brought close to the structure having an angle with the asbestos-containing wall. let By bringing the tip 33b close, the asbestos-containing wall near the structure that is at an angle with the asbestos-containing wall is cut.

When cutting the edge of an asbestos-containing wall, a removable cover 53 is attached to the fixed cover 51. By attaching the removable cover 53 to the fixed cover 51 and bringing the side surface of the vertical plate 532 into close contact with a surface of the asbestos-containing wall that is angled with respect to the surface to be cut, the area to be cut is covered with the cover 5.

The asbestos removal and recovery device 1 of this embodiment, which is configured and operated as described above, uses water as both the power source of the rotary cutter 3 and the medium for preventing scattering and recovering the removed asbestos-containing walls. , the power source and the medium can be supplied and recovered in one system. Therefore, the number of hoses connected to the asbestos removal and recovery device 1 can be reduced, the hoses can be easily handled, and work efficiency is improved. In addition, since water as a power source can be used as a medium for preventing scattering and recovering asbestos, the flow path within the device can be easily configured, so the scale of the asbestos removal and recovery device 1 can be reduced and costs can be reduced. is possible.

By configuring the cover 5 with the fixed cover 51, the movable cover 52, and the removable cover 53, it is possible to cut the flat parts, corners, and edges of the asbestos-containing wall while covering the part to be cut.

The pressurized water in the return flow path 43 after applying the driving force to the rotary cutter 3 serves as a medium for preventing and recovering asbestos, so the pressurized water in the return flow path 4 is used without reducing the driving force of the rotary cutter 3. Water can be efficiently injected into the cover 5 using water.

Although the embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the above embodiments, and the combination of components may be changed or changed without departing from the spirit of the present invention. Various changes can be made or deleted.

For example, the branch port 431 may be formed in the supply side flow path 41 instead of the return side flow path 43.

The movable cover 52 or the removable cover 53 may not be provided. When the movable cover 52 is not provided, the first side wall 512 of the cut portion 51b of the fixed cover 51 is made to protrude to a height near the tip 33b of the rotary body 33 of the rotary cutter 3.

1 Asbestos removal and recovery device 2 Housing 21 Handle section 23 Main body section 3 Rotating cutter 31 Rotating shaft 32 Gear 33 Rotating body 34 Cutter bit 4 Pressurized water supply channel 41 Supply side channel 42 Load section 43 Return side channel 5 Cover 51 Fixed cover 52 Movable cover 53 Removable cover 6 Water jet channel 61 Pipe 62 Hose 7 Suction part

Claims (1)

An asbestos removal and recovery device that removes and recovers asbestos-containing walls,
A casing and
a rotary cutter having a rotating shaft supported by the casing and cutting the asbestos-containing wall;
a pressurized water supply channel that supplies pressurized water that applies rotational force to the rotary cutter;
a cover having an opening and covering the rotary cutter and the cutting location;
a water injection flow path that branches from the pressurized water supply flow path and communicates with the space within the cover;
a suction part that communicates with the space inside the cover and creates a negative pressure inside the cover with the edge of the opening of the cover in close contact with the asbestos-containing wall ;
The water jet flow path branches from the return side flow path of the pressurized water supply flow path.
Asbestos removal and recovery equipment.

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