JP7429185B2 - Ceiling surface cleaning method using a ceiling surface cleaning vehicle - Google Patents

Description

The present invention relates to a ceiling surface cleaning method using a ceiling surface cleaning vehicle, and in particular to a ceiling surface cleaning method in which a ceiling surface cleaning unit equipped with a dry type sanding machine is mounted on a work deck that can be raised and lowered of an aerial work vehicle. This invention relates to a ceiling surface cleaning method using a surface cleaning vehicle.

For example, many box culvert type road tunnels have been constructed as concrete structures on the Metropolitan Expressway and other roads, and many of them have been in service for more than 30 years. For this reason, various types of repair work, including prevention of concrete pieces from falling off, are being carried out on the ceiling surfaces of concrete structures such as old road tunnels.

On the other hand, when performing surface treatment work (base preparation work) as part of repair work on the walls of concrete structures, it is generally done by polishing the concrete surface using a water jet-based polishing device. (For example, see Patent Document 1 and Patent Document 2).However, these surface cleaning devices using water jets generate a large amount of water, so they do not clean the surface of the concrete structure. It is difficult to construct the For this reason, a ceiling surface polishing device and a cleaning method have been developed that make it possible to efficiently polish the ceiling surface of a box culvert type road tunnel using a known dry type polishing device. (For example, see Patent Document 3 and Patent Document 4).

Japanese Patent Application Publication No. 2000-141354 Japanese Patent Application Publication No. 2005-254156 JP 2017-40103 Publication JP 2017-40104 Publication

However, in the ceiling surface polishing apparatus and method described in Patent Document 3 and Patent Document 4, the height of the guide column that guides the elevation of the elevating frame mounted on the transport vehicle is limited by the Road Traffic Act. Therefore, there are restrictions on the height of the ceiling surface that can be applied, and the outrigger part is difficult to install because it is necessary to adjust the loading platform of the transport vehicle to be horizontal or almost horizontal. It is difficult to use it in the workplace.

For this reason, in Japanese Patent Application No. 2020-215265 filed on the same date, the applicant proposed that even if the downward ceiling surface on which the cleaning work is to be performed is at a considerable height, the dry sanding equipment cannot be used to clean concrete structures. Disclosed is a ceiling surface cleaning vehicle that can efficiently polish the ceiling surface of a vehicle and can perform the cleaning work without adjusting the loading platform of the vehicle to be horizontal or approximately horizontal.

On the other hand, the ceiling surface cleaning vehicle described in Japanese Patent Application No. 2020-215265 is configured by mounting a ceiling surface cleaning unit equipped with a dry-type sanding machine on the work deck of an aerial work vehicle that can be raised and lowered. Therefore, in order to be able to efficiently grind the ceiling surface, at the spot on the ceiling surface to be polished, immediately move the cutting disc of the dry cleaner to a stable position along the ceiling surface to be polished. It is necessary to be able to move the device while keeping it in contact with the device.

According to the present invention, at a location where a ceiling surface is to be polished, a cutting disk of a dry type sanding machine of a ceiling surface polishing unit mounted on a work deck that can be raised and lowered of an aerial work vehicle is immediately moved to the surface of the ceiling surface to be polished. An object of the present invention is to provide a method for cleaning a ceiling surface using a ceiling surface cleaning vehicle, which can efficiently perform ceiling surface polishing work by moving the ceiling surface along the surface of the vehicle while making stable contact with the ceiling surface. shall be.

The present invention provides a ceiling surface cleaning method using a ceiling surface cleaning vehicle configured by mounting a ceiling surface cleaning unit equipped with a dry type sander on a liftable work deck of an aerial work vehicle, the method comprising: The ceiling surface polishing unit includes a base frame section, the dry sanding machine, a moving rail section provided on the upper surface of the base frame section for moving the dry sanding machine, and the base frame section and the working section. Lifting jacks are interposed between the deck and the base frame section, and distance sensors are disposed on the four sides of the base frame section and measure the distance to the ceiling surface in a non-contact manner. At least two contact sensors are arranged on both sides of the dry sanding machine to detect contact with the ceiling surface, and when the work deck is not raised, the The step of driving the work vehicle and moving the ceiling surface cleaning vehicle to the ceiling surface cleaning location, and at the moved ceiling surface cleaning location, raising the work deck and moving the ceiling surface cleaning unit a step of arranging the dry sanding machine close to the ceiling surface, and controlling the drive of the lifting jack while measuring the distance to the ceiling surface with the distance sensor without contact, so that the dry sanding machine is moved by the movable rail section. A step of adjusting the inclination of the ceiling surface cleaning unit so that the running surface is arranged parallel to the ceiling surface, and after adjusting the inclination of the ceiling surface polishing unit, simultaneously driving the lifting jacks installed on all four sides. and raising the ceiling surface polishing unit until the contact sensor comes into contact with the ceiling surface while maintaining the running surface of the dry sanding machine parallel to the ceiling surface, and then, The method includes the step of: moving the dry type sander along a moving rail section while pressing a cutting disk of the dry type cleaner against the ceiling surface, thereby cleaning the ceiling surface at the location to be polished; The above object has been achieved by providing a ceiling surface cleaning method using a ceiling surface cleaning vehicle.

In the ceiling surface cleaning method using the ceiling surface cleaning vehicle of the present invention, the ceiling surface cleaning unit is arranged such that the traveling surface of the dry type sanding machine by the moving rail section is arranged parallel to the ceiling surface. In the process of adjusting the inclination, the expansion and contraction of the two lifting jacks installed on one side are controlled so that the running surface in the direction perpendicular to the direction in which the two lifting jacks are lined up is aligned with the ceiling in the same direction. After adjustment so that they are arranged parallel to the surface, the two lifting jacks installed on one side are aligned in a direction perpendicular to the direction in which the two lifting jacks installed on one side are lined up. It is preferable to control so that the running surface in the direction perpendicular to the direction in which these two lifting jacks are lined up is arranged parallel to the ceiling surface in the same direction.

Further, in the method for cleaning a ceiling surface using a ceiling surface cleaning vehicle of the present invention, the contact sensor contacts the ceiling surface while the running surface of the dry cleaner is kept in a state parallel to the ceiling surface. In the step of raising the ceiling surface polishing unit to the ceiling surface, it is preferable that the driving of all the lifting jacks be controlled to automatically stop at the same time when at least one of the contact sensors comes into contact with the ceiling surface.

Further, in the ceiling surface polishing method using a ceiling surface polishing vehicle of the present invention, the above-mentioned aerial work vehicle is equipped with roller jacks provided at four corner regions of a loading platform portion of the aerial work vehicle, and the above-mentioned dry grinding By moving the vacuum cleaner along the movable rail section, after the process of cleaning the ceiling surface at the location to be polished, the running surface of the dry vacuum cleaner is maintained in a state parallel to the ceiling surface. , with the lower end rollers of the roller jacks in the four locations in contact with the road surface, the ceiling surface cleaning unit installed on the work deck is operated at low speed to the next adjacent polishing location. Preferably, it includes a step of moving to the next location to be polished.

According to the ceiling surface cleaning method using a ceiling surface cleaning vehicle of the present invention, at the location to be polished on the ceiling surface, the ceiling surface cleaning unit mounted on the work deck that can be raised and lowered of the aerial work vehicle is immediately cleaned. A cutting disk of a dry type sanding machine can be moved along the ceiling surface to be polished while being in stable contact with the ceiling surface, and the ceiling surface can be efficiently polished.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view illustrating a ceiling cleaning vehicle in which a ceiling cleaning method according to a preferred embodiment of the present invention is carried out. FIG. 2 is a side view of a ceiling surface cleaning unit that constitutes a ceiling surface cleaning vehicle. It is a top view of the ceiling surface cleaning unit which comprises the vehicle for ceiling surface cleaning. FIG. 2 is a front view of a ceiling surface cleaning unit that constitutes a ceiling surface cleaning vehicle. (a) is a side view, (b) is a rear view, and (d) is a plan view of the dry type sanding machine.

A ceiling surface cleaning method according to a preferred embodiment of the present invention is a method for cleaning a ceiling surface 50 using a ceiling surface cleaning vehicle shown in FIG. A downward-facing ceiling surface 50 of a box culvert type road tunnel that has been aged for more than 30 years is constructed by mounting a ceiling surface cleaning unit 10 on a work deck 41 that can be raised and lowered of an aerial work vehicle 40. This method is used as a method for cleaning the ceiling surface with the dry type sander 30 of the vehicle 1 for cleaning the ceiling surface. In the ceiling surface cleaning method of the present embodiment, the ceiling surface cleaning vehicle 1 performs the cleaning work by having a dry type sanding machine 30 mounted on a work deck 41 of a known aerial work vehicle 40. Even when the downward ceiling surface 50 is located at a considerable height, the downward ceiling surface of a box culvert type road tunnel, which is a concrete structure, can be efficiently polished. . In addition, the ceiling surface cleaning method of the present embodiment allows the cutting disk 36a of the dry cleaner 30 to move along the ceiling surface 50 to be polished while being in stable contact with the ceiling surface 50, thereby efficiently cleaning the ceiling surface. It has a function that allows you to perform grinding work.

The ceiling surface cleaning method using the ceiling surface cleaning vehicle of the present embodiment includes mounting the ceiling surface cleaning unit 10 equipped with the dry type sanding machine 30 on the work deck 41 of the aerial work vehicle 40 that can be raised and lowered. A method of cleaning a ceiling surface using a vehicle for cleaning a ceiling surface, which includes a ceiling surface cleaning unit 10, a base frame section 11, a dry type sanding machine 30, and a top surface section of the base frame section 11. Lifting jacks 15 installed on all sides of the base frame 11 are interposed between the movable rail section 18 provided to move the dry sanding machine 30, the base frame section 11, and the work deck 41, and the base frame section. Distance sensors 16 are arranged on all sides of the dry cleaner 11 to measure the distance to the ceiling surface 50 without contact, and distance sensors 16 are arranged on both sides of the dry sander 30 to detect contact with the ceiling surface 50. The contact sensor 17 is configured to include at least two contact sensors 17. The ceiling surface cleaning method includes the steps of driving the aerial work vehicle 40 with the work deck 41 not raised and moving the ceiling surface cleaning vehicle 1 to the cleaning location on the ceiling surface 50; At the location to be polished on the ceiling surface 50, the work deck 41 is raised to place the ceiling surface cleaning unit 10 close to the ceiling surface, and the distance to the ceiling surface 50 is measured in a non-contact manner by the distance sensor 16. and controlling the drive of the lifting jack 15 to adjust the inclination of the ceiling surface polishing unit 10 so that the running surface of the dry type sanding machine 30 by the moving rail section 18 is arranged parallel to the ceiling surface 50. After adjusting the inclination of the ceiling surface polishing unit 10, the lifting jacks 15 installed on all sides are simultaneously driven to maintain the state in which the running surface of the dry type sanding machine 30 is arranged parallel to the ceiling surface 50. A process of raising the ceiling surface polishing unit 10 until the contact sensor 17 comes into contact with the ceiling surface 50, and then, with the cutting disc 36a of the dry type sander 30 pressed against the ceiling surface 50, the dry type sanding machine 30 is The step of cleaning the ceiling surface 50 at the location to be cleaned by moving the cleaning device along the moving rail section 18 includes the step of cleaning the ceiling surface 50 at the cleaning location.

In this embodiment, the box culvert type road tunnel whose ceiling surface 50 is polished by the ceiling surface cleaning unit 10 is formed using a known construction method using, for example, cast-in-place concrete or precast concrete. It is a hollow, rectangular cross-sectional tunnel with a width of about 5.0 to 7.0 m and a width of about 10.0 to 20.0 m. In a box culvert type road tunnel, if the road surface 51 (see FIG. 1) formed at the bottom of the hollow rectangular cross-sectional shape has a vertical slope, the ceiling surface 50 also has a similar or approximately The tunnel is constructed with the ceiling surface 50 inclined in the direction in which the tunnel extends so as to have a similar vertical slope. In a box culvert type road tunnel, when the road surface 51 formed at the bottom of a hollow rectangular cross-sectional shape has a cross slope, the ceiling surface 50 is preferably not inclined with a similar cross slope. It is constructed with a ceiling surface 50 formed horizontally or approximately horizontally in the transverse direction.

In addition, in this embodiment, the aerial work vehicle 40 in which the ceiling surface polishing unit 10 is installed on the work deck 41 has a work deck 41 that can be raised and lowered, for example, by a known lifting mechanism 42, as shown in FIG. This is a work vehicle installed in a loading platform 43 of a truck, and allows workers to perform various types of high-place work using the flat work floor of a work deck 41 as a foothold. In addition, by installing various devices and equipment using the flat work floor of the work deck 41 as a support frame, it is possible to perform high-altitude work using these devices and devices, for example, by operating them from the ground using a remote controller (not shown). It is now possible to do this. In this embodiment, the work deck 41 can be raised and lowered from the loading platform 43 of the aerial work vehicle 40 to a height of preferably about 0 to 3.4 m, for example, by operating a remote controller from the ground. For example, even on the ceiling surface 50 located at a considerable height of about 4.0 to 7.5 m from the road surface 51, the ceiling surface cleaning unit 10 installed on the work deck 41 can efficiently perform the cleaning work. It is now possible to do so.

In addition to the ceiling surface cleaning unit 10, a control panel, air equipment, a generator, a dust collector, a compressor, etc. can be loaded onto the work deck 41 of the aerial work vehicle 40. If all of these devices and equipment cannot be loaded onto the work deck 41 of the aerial work vehicle 40, an auxiliary transport vehicle (not shown) such as a 2t truck may be used to load the generator, dust collector, etc. The loaded compressor and the like are transported to the cleaning location on the ceiling surface 50, and at the cleaning location on the ceiling surface 50, these devices and the ceiling surface cleaning unit 10 are connected using a one-touch joint, a cam lock, a connector, etc. By connecting using a known connection means, the ceiling surface 50 can be cleaned.

In this embodiment, the base frame part 11 constituting the ceiling surface cleaning unit 10 is formed into a three-dimensional frame shape by assembling, for example, channel steel, angle iron, etc. It has a rectangular planar shape with a width in the left-right direction Y of about 1750 mm and a length in the front-rear direction X of about 3000 mm, which can fit in the work deck 41 (see FIG. 3). The base frame portion 11 includes a rectangular frame-shaped upper frame portion 12 that constitutes the base frame portion 11, and is provided on both sides of the long side direction (front-back direction X) to extend in the short side direction (horizontal direction Y). A moving rail, which will be described later, is provided on the upper end surface of the pair of attached side channel steels 12a, and on the upper end surface of the intermediate channel steel 12b provided in the intermediate portion of these pair of side channel steels 12a. The left-right rail members 18a constituting the portion 18 are laid so as to extend parallel to each other.

As shown in FIG. 3, the moving rail portion 18 provided on the upper surface of the upper frame portion 12 of the base frame portion 11 is a left-right rail member that moves the dry sanding machine 30 in the left-right direction (short side direction) Y. 18a, and a longitudinal direction rail member 18b for moving the dry type sanding machine 30 in the longitudinal direction (long side direction) X. As described above, the left-right rail member 18a is laid on the upper end surface of the pair of side channel steel 12a and intermediate channel steel 12b attached to the upper frame section 12 forming the base frame section 11, They are provided in three rows extending parallel to the short side direction Y of the upper frame portion 12. On the left-right rail member 18a, a transverse frame portion 46 on which the front-back rail member 18b is laid is placed so as to be movable in the left-right direction Y.

The transverse frame portion 46 is formed by assembling channel steel, angle iron, etc., for example, and has a width in the left-right direction Y of about 600 mm, and a length in the front-rear direction X that is slightly longer than the length of the base frame portion 11, for example. It has a rectangular planar shape that is vertically elongated in the front-rear direction X and has a size of about 3200 mm. Front and rear direction rail members 18b are respectively laid on the upper end surfaces of the long side channel steels 46a arranged on the left and right long side portions forming the transverse frame portion 46. On the longitudinal direction rail member 18b, a dry type sanding machine 30 is placed so as to be movable in the longitudinal direction X. A surface defined by the upper end surfaces of the pair of front-rear rail members 18b and including these upper end surfaces forms a running surface of the dry sanding machine 30.

The transverse frame section 46 also includes running wheels 46b for moving the transverse frame section 46 along the left-right rail member 18a laid on the upper surface of the upper frame section 12 of the base frame section 11. A travel drive device 46c (see FIG. 4) is attached. In this embodiment, the moving rail section 18 includes a horizontal rail member 18a, a longitudinal rail member 18b, a transverse frame section 46, running wheels 46b, a running drive device 46c, and the like.

The dry type sanding machine 30 is provided movably in the long side direction (back-and-forth direction As shown in a) to (c), a traveling base portion 31, an intermediate plate portion 33 disposed above the traveling base portion 31 with a load cell 32 interposed between the traveling base portion 31, A cleaning machine mounting plate 35 is disposed further above the intermediate plate part 33 with an air cylinder 34 interposed between it and the intermediate plate part 33, and a cleaning machine is supported and mounted on the cleaning machine mounting plate 35. It is configured to include a main body 36. Guide shafts 37 are installed upwardly from the four corner portions of the traveling base portion 31, and guide shafts 37 are provided at the four corner portions of the cleaning machine mounting plate 35. By installing the linear bushes 38 respectively, the grinder mounting plate 35 can be raised and lowered in a stable state as the air cylinder 34 expands and contracts, guided by the guide shaft 37 and the linear bushes 38. It is now possible to do so. The air cylinder 34 is configured to be able to press the cutting disk 36a of the cleaner body 36 against the ceiling surface 50.

The main body 36 of the grinder can be used by appropriately modifying various known grinding machines capable of forming a flat work surface by grinding a concrete floor or the like. As such a grinding machine, for example, the product name "New Tornado" (manufactured by CRT Corporation) can be preferably used. The cleaner main body 36 includes a cutting disk 36a, a suction dust collector 36b, a drive motor 36c, and the like. Further, a scattering prevention member (not shown) made of a flexible spatula member, brush-like member, or the like is provided so as to surround the cutting disk 36a. This effectively prevents the dust generated when grinding is performed by pressing the cutting disk 36a facing upward against the ceiling surface 50 of a box culvert type road tunnel from leaking out of the main body 36 of the grinder. possible to avoid. A discharge pipe 49 is provided connected to the cleaner main body 36 (see FIGS. 1 and 2).

On the traveling base part 31 of the dry type sanding machine 30, the dry type sanding machine 30 is made to travel along a longitudinal direction rail member 18b laid on the upper end surface of the long side channel steel 46a of the transverse frame part 46. For this purpose, running wheels 31a and a running drive device 31b are attached. As a result, the dry type sanding machine 30 can travel in the longitudinal direction By moving the transverse frame part 46 along the left-right rail member 18a laid on the upper surface of the upper frame part 12 of the base frame part 11, it can also be moved in the short side direction Y of the base frame part 11. It has become.

Air cylinders 34 are extendably disposed between the intermediate plate portion 33 of the dry-type sanding machine 30 and the sanding machine mounting plate 35, and are attached to the front and rear parts of the sanding machine mounting plate 35, respectively. The pressing force of the cleaning machine main body 36 against the ceiling surface of the road tunnel, which is measured by the load cell 32 interposed between the traveling base part 31 and the intermediate plate part 33, is, for example, 0.3 to 0. The cutting disk 36a of the cleaner main body 36 can be pressed against the ceiling surface 50 while the cleaner mounting plate 35 is raised and lowered so that the pressure becomes 9 MPa. By using the air cylinder 34 as a cylinder member for raising and lowering the cleaning machine mounting plate 35, it is possible to follow the irregularities of about ±40 mm that exist on the ceiling surface 50 of the road tunnel and absorb these irregularities. It becomes possible.

In the present embodiment, the ceiling surface cleaning unit 10 is installed on all sides of the base frame part 11, interposed between the base frame part 11 and the work deck 41 of the aerial work vehicle 40, which is a support frame. distance sensors 16 that are arranged on all sides of the base frame section 11 to measure the distance to the ceiling surface 50 in a non-contact manner; It includes at least two contact sensors 17 that detect contact with the surface 50.

The lifting jack 15 includes a lower frame part 13 having a rectangular frame shape, which is assembled into a three-dimensional frame shape via an upper frame part 12 of a base frame part 11 and a connecting frame part 14 having a truss structure. It is attached to the lower frame portion 13 and the connecting frame portion 14 at four corner portions by bolting or welding. The lower frame portion 13 is formed to have a shorter length in the long side direction X than the upper frame portion 12 . As a result, the lifting jacks 15 are provided at four locations in the four corner regions of the base frame portion 11 in a state where they can be expanded and contracted in the vertical direction.

In this embodiment, for example, a screw jack can be preferably used as each lifting jack 15. The lifting jack 15 can be extended and contracted by, for example, a driving force from a drive motor (not shown), preferably by operation from a remote controller. The lifting jack 15 is attached with a drive main body part 15a connected to a drive motor connected to the lower frame part 13 and a connecting frame part 14, and with an extendable part 15b (see FIG. 4) extending in the vertical direction. ing. Furthermore, an installation board section 15c is attached to the lower end of the telescopic section 15b of the lifting jack 15. By placing these four installation board parts 15c in close contact with the work floor formed by the work deck 41 of the aerial work vehicle 40, the ceiling surface polishing unit 10 can be installed on the work deck of the aerial work vehicle 40. 41, it becomes possible to install it in a stable state. By expanding and contracting each of the lifting jacks 15 arranged in the four corner areas, the running surface of the base frame part 11 and the moving rail part 18 attached to the upper frame part 12 on the upper surface thereof can be moved up and down. The inclination of the running surface can be easily adjusted so that the running surface is parallel or substantially parallel to the ceiling surface 50 to be polished.

In this embodiment, the distance sensors 16, which are disposed on all sides of the base frame section 11 and measure the distance to the ceiling surface 50 in a non-contact manner, detect reflected waves when electromagnetic waves are emitted toward the ceiling surface 50, for example. This is a known non-contact sensor that can detect the distance from the ceiling surface 50 of the road tunnel. In the present embodiment, the distance sensor 16 is provided at the base end portion of an upright rod 48 that is erected from the distal end portion of an overhanging support plate 47 that is provided overhanging in the front-rear direction X from each of the four corner portions of the base frame portion 11. It is attached at four locations so as to protrude from the base end portion (see FIGS. 2 and 3).

In this embodiment, the contact sensors 17, which are arranged on both sides of the dry sanding machine 30 to detect contact with the ceiling surface 50, have a non-contact distance sensor 16 attached to the base end. By being attached to the tip of the upright rod 48 that stands up from the above-mentioned overhanging support plate 47 provided at the four corners of the base frame section 11, the base frame section preferably sandwiches the dry sanding machine 30. They are provided in four locations, at least two locations, on both end portions in the long side direction of 11. The contact sensor 17 is arranged at a position higher than the cutting disk 36a of the main body 36 of the dry-type sanding machine 30, for example, at a position about 5 cm higher than the cutting disk 36a. When the contact sensor 17 comes into contact with the ceiling surface 50, it is possible to stop the lifting jack 15 from lifting the cleaner body 36 and the cutting disk 36a.

The contact sensor 17 is a known sensor that includes, for example, a sensor body that is biased upwardly by a spring member, a limit switch, a switch adjuster, etc., and preferably the sensor body is a spring member. The contact with the ceiling surface 50 can be detected by being pushed in against the biasing force.

In order to polish the ceiling surface 50 of a box culvert type road tunnel using the ceiling surface cleaning vehicle 1 of this embodiment having the above-described configuration, the work deck 41 of the aerial work vehicle 40 must be raised. In this state, the ceiling surface cleaning unit 10 is loaded onto the work deck 41 and moved to the location where the ceiling surface 50 is to be polished. Since the aerial work vehicle 40 can run on the road like a general vehicle, the ceiling surface cleaning unit 10 can be quickly moved to the location where the ceiling surface 50 is to be polished in the road tunnel.

At the location where the ceiling surface 50 of a box culvert type road tunnel is to be polished, auxiliary equipment such as a generator, dust collector, compressor, etc., and the ceiling surface cleaning unit 10, which are loaded onto the following auxiliary transport vehicle as necessary, are used. For example, connect them using a connection means such as a one-touch joint, cam lock, or connector. After that, using a remote controller such as a pendant switch connected to a control panel (not shown) provided on the aerial work vehicle 40, the cleaning work of the ceiling surface 50 is performed as follows. It will be.

That is, as shown in FIG. 1, in the cleaning method of polishing the downward ceiling surface 50 of a box culvert type road tunnel, which is a concrete structure, using the ceiling surface cleaning vehicle 1 of the present embodiment, as shown in FIG. A ceiling surface cleaning vehicle 1 loaded with a ceiling surface cleaning unit 10 on a work deck 41 of an aerial work vehicle 40 is moved to a location where a ceiling surface 50 is to be polished. Thereafter, by extending the roller jacks 44 at four locations provided at the four corner regions of the platform portion 43 of the aerial work vehicle 40, the roller portions 44a at the lower ends of the jacks 44 are brought into contact with the road surface 51. Then, the aerial work vehicle 40 with the work deck 41 movable up and down and its loading platform 43 are installed at the work location in a stable state. In the ceiling surface cleaning vehicle 1 of this embodiment, there is no need to adjust the loading platform portion 43 of the installed aerial work vehicle 40 so that it is horizontal or approximately horizontal.

Next, by operating the remote controller and preferably viewing a monitor screen provided on the control panel, the height of the aerial work vehicle 40 is adjusted while checking the distance to the ceiling surface 50 detected by each distance sensor 16. The lifting mechanism 42 is driven and controlled to move the work deck 41 on which the ceiling surface cleaning unit 10 is installed such that the distance between the cutting disc 36a of the cleaning machine body 36 of the dry type sanding machine 30 and the ceiling surface 50 is 170, for example. The ceiling surface polishing unit 10 is placed close to the ceiling surface 50 by raising the ceiling surface to about 200 mm. In this embodiment, the ceiling surface 50 is arranged at a considerable height position of about 4.0 to 7.5 m from the road surface 51, but the lifting mechanism 42 of the aerial work vehicle 40 is controlled to raise and lower the work deck 40. By raising the ceiling surface cleaning unit 10, it becomes possible to smoothly arrange the ceiling surface cleaning unit 10 close to the ceiling surface 50.

Here, the loading platform portion 43 of the aerial work vehicle 40 is arranged, for example, on the slope of the road surface 51 and is not necessarily arranged horizontally. It is necessary to adjust the traveling surface of the main body 36 of the cleaning machine by the elevated work deck 41 and the moving rail section 18 of the ceiling surface polishing unit 10 mounted thereon so that it is arranged parallel to the ceiling surface 50. .

In order to adjust the running surface of the cleaning machine body 36 in the ceiling surface cleaning unit 10 mounted on the work deck 41 so that it is arranged parallel to the ceiling surface 50, first, for example, the short side of the base frame section 11 is While controlling the expansion and contraction of the two lifting jacks 15 provided on one side in the direction Y and checking the distance to the ceiling surface 50 using the distance sensor 16, preferably in the short side direction perpendicular to the axial direction of the tunnel. At Y, adjustment is made so that the running surface of the cleaner main body 36 and the ceiling surface 50 are arranged parallel to each other.

Thereafter, for example, while controlling the expansion and contraction of the two lifting jacks 15 provided on one side in the long side direction is adjusted so that the running surface of the cleaner main body 36 and the ceiling surface 50 are arranged parallel to each other in the long side direction X along the axial direction of the tunnel. These allow the entire running surface to be arranged parallel or substantially parallel to the ceiling surface 50.

Once the entire running surface is arranged parallel or substantially parallel to the ceiling surface 50, for example, the lifting jacks 15 arranged at the four corner areas of the base frame section 11 are controlled to extend simultaneously. The base frame part 11 and the main body of the cleaner attached thereto remain in a state where the entire part is arranged parallel or substantially parallel to the ceiling surface 50 until the contact sensor 17 detects contact with the ceiling surface 50. Raise 36.

By simultaneously extending the lifting jacks 15 at four locations, the base frame portion 11 and the cleaner main body 36 are raised, and when the contact sensor 17 detects contact with the ceiling surface 50, the base frame portion 11 and the cleaner are lifted. By controlling the remote controller so that the lifting of the main body 36 is automatically stopped, the base frame portion 11 that has automatically stopped is preferably connected to the cutting disk 36a of the main body 36 of the dry-type sanding machine 30. The entire running surface is parallel or approximately parallel to the ceiling surface 50 so that the cleaner main body 36 can move vertically and horizontally while maintaining a predetermined gap of about 5 cm between the main body 36 and the ceiling surface 50. It becomes possible to arrange it as follows.

In this way, while maintaining a predetermined gap of about 5 cm between the cutting disk 36a of the sweeper body 36 and the ceiling surface 50, the running surface of the moving rail section 18 is set parallel to or parallel to the ceiling surface 50. Once they are arranged so that they are approximately parallel to each other, for example, with the dry-type sanding machine 30 installed at the starting position on the running surface, the cutting disc 36a of the main body 36 of the sanding machine is rotated by the drive motor 36c, and at the same time, the air cylinder 34 For example, with a pressing force of 0.3 to 0.9 MPa, a scattering prevention member (not shown) such as a spatula member or a brush-like member around the cutting disk 36a is pressed against the ceiling surface 50 together with the cutting disk 36a.

Once the cutting disk 36a is rotated and pressed against the ceiling surface 50 together with the scattering prevention member around it, while maintaining this state, the cutting disk 36a is cut, for example, by dry cutting along the longitudinal rail member 18b installed on the transverse frame portion 46. The cleaning machine 30 is automatically run from a starting position at one end in the long side direction X toward the other end. The longitudinal rail member 18b is preferably provided with limit switches at both ends thereof, so that when the dry sanding machine 30 reaches the other end by traveling on the longitudinal rail member 18b, Running will stop automatically.

When the dry sanding machine 30 automatically stops at the other end of the longitudinal rail member 18b, the transverse frame portion 46 is moved in the short side direction Y by about 200 to 300 mm, for example, along the horizontal rail member 18a. make it stop. Thereafter, the dry sanding machine 30 is automatically moved along the longitudinal direction rail member 18b of the transverse frame portion 46 from the other end in the long side direction X, as described above. In this way, while rotating the cutting disk 36a, the dry sanding machine 30 is moved and stopped in the long side direction along the front-rear rail member 18b, and the traverse frame portion 46 is moved along the left-right rail member 18a. By repeating the movement and stopping in the short side direction Y, the entire ceiling surface 50 at the cleaning location where the aerial work vehicle 40 is installed can be efficiently polished.

Therefore, in the ceiling surface cleaning method using the ceiling surface cleaning vehicle of this embodiment, the aerial work vehicle 40 is operated with the work deck 41 not raised, and the ceiling surface cleaning vehicle 1 is moved to the ceiling surface. 50, at the moved ceiling surface 50 to be polished, the work deck 41 is raised to place the ceiling surface cleaning unit 10 close to the ceiling surface, and the distance sensor 16 While measuring the distance to the ceiling surface 50 in a non-contact manner, the drive of the lifting jack 15 is controlled so that the running surface of the dry sanding machine 30 by the moving rail section 18 is arranged parallel to the ceiling surface 50. The process of adjusting the inclination of the ceiling surface polishing unit 10 and once the inclination of the ceiling surface polishing unit 10 is adjusted, the lifting jacks 15 installed on all sides are simultaneously driven to raise the running surface of the dry type sanding machine 30 to the ceiling. A process of raising the ceiling surface polishing unit 10 until the contact sensor 17 comes into contact with the ceiling surface 50 while maintaining the state in which it is arranged parallel to the surface 50, and then moving the cutting disc 36a of the dry cleaner 30 to the ceiling. By moving the dry type sanding machine 30 along the moving rail section 18 while being pressed against the surface 50, the structure includes the step of cleaning the ceiling surface 50 at the location to be polished. .

In addition, in the ceiling surface cleaning method using the ceiling surface cleaning vehicle of the present embodiment, the ceiling surface cleaning unit 10, preferably by controlling the expansion and contraction of the two lifting jacks 15 provided on one side in the short side direction Y, and adjusting the direction in which the two lifting jacks 15 are lined up (in the long side direction). After adjusting so that the running surface in the direction perpendicular to X) (short side direction Y) is arranged parallel to the ceiling surface in the same direction, The running surface in the long side direction X, which is perpendicular to the direction in which the two lifting jacks 15 provided on one side in the side direction X are lined up (short side direction Y), is a ceiling surface in the same direction as this. It is designed to be adjusted so that it is placed parallel to the

Furthermore, in the ceiling surface cleaning method using the ceiling surface cleaning vehicle of the present embodiment, the contact sensor 17 is connected to the ceiling surface 50 while maintaining the running surface of the dry cleaner 30 parallel to the ceiling surface 50. In the process of raising the ceiling surface polishing unit 10 until it comes into contact with the ceiling surface, when at least one contact sensor 17 comes into contact with the ceiling surface, the driving of all the lifting jacks 15 is controlled to automatically stop at the same time. ing.

When the entire ceiling surface 50 has been polished at the cleaning location where the aerial work vehicle 40 is installed, the lifting jacks 15 placed at the four corner areas of the base frame portion 11 are simultaneously retracted. The dry sanding machine 30 is lowered together with the base frame part 11 by, for example, about 10 cm under controlled conditions, preferably with the running surface of the moving rail part 18 kept parallel or substantially parallel to the ceiling surface 50. After the dry type sanding machine 30 is lowered together with the base frame part 11 and the scattering prevention members of the cutting disc 36a are separated from the ceiling surface 50, the scattering prevention members of the cutting disc 36a are preferably installed in the four corner areas of the platform part 43 of the aerial work vehicle 40. The roller parts 44a at the lower ends of the roller jacks 44 at four locations are brought into contact with the road surface 51, and the height work vehicle 40 and its loading platform 43 are kept stable. The vehicle 40 is driven at a low speed to move the ceiling surface polishing unit 10 installed on the work deck 41, which is a support frame, to the next polishing location adjacent to the current cleaning location.

That is, in the ceiling surface cleaning method using the ceiling surface cleaning vehicle of the present embodiment, the aerial work vehicle 40 is equipped with roller jacks 44 provided at the four corner regions of the platform portion 43, By moving the dry type sanding machine 30 along the moving rail part 18, after the step of cleaning the ceiling surface 50 at the cleaning location, the running surface of the dry type sanding machine 30 is arranged parallel to the ceiling surface 50. While maintaining this state, the roller jacks 44 at the four locations are driven at low speed to the next grinding location with the roller portions 44a at the lower ends of the roller jacks 44 in contact with the road surface 51, and then placed on the work deck 41. This includes the step of moving the installed ceiling surface cleaning unit 10 to the next cleaning location.

When the ceiling surface cleaning unit 10 is moved to the next location to be cleaned, the same steps as described above are repeated at the next location to be cleaned, thereby cleaning the entire ceiling surface 50 at the next location.

Further, by repeatedly moving the ceiling surface cleaning unit 10 and cleaning the ceiling surface 50 at the moved cleaning location, for example, once the cleaning of the ceiling surface 50 at the entire construction site of the cleaning work is completed, Preferably, the lifting jacks 15 disposed at four corner areas of the base frame section 11 are fully retracted to lower the ceiling surface cleaning unit 10, and the dry type sanding machine 30 is moved to the center of the running surface. The work deck 41 on which the ceiling surface polishing unit 10 is installed is lowered to the storage position in the loading platform portion 43 by moving and fixing it, and then driving and controlling the lifting mechanism 42 of the aerial work vehicle 40 to The aerial work vehicle 40 equipped with the surface polishing unit 10 can be brought into a state where it can travel to another construction site.

Therefore, according to the ceiling surface cleaning method using the ceiling surface cleaning vehicle 1 of the present embodiment, the ceiling surface cleaning unit 10 includes the base frame section 11 in which the moving rail section 18 is provided on the upper surface section, and the base frame Lifting jacks 15 are interposed between the part 11 and the work deck 41 and installed on all sides of the base frame part 11, and lifting jacks 15 are installed on all sides of the base frame part 11 to control the distance from the ceiling surface 50 without contact. It is configured to include a distance sensor 16 that measures the distance at the ceiling surface 50, and at least two contact sensors 17 that are placed on both sides of the dry sanding machine 30 to detect contact with the ceiling surface 50. After the cleaning unit 10 is supported by the work deck 41 and installed below the ceiling surface 50, the movable rail section 18 moves the running surface of the dry type sanding machine 30 from the ceiling surface 50 to a predetermined distance. It has the function of being able to be arranged in parallel or substantially parallel at intervals. As a result, at the point to be polished on the ceiling surface, the cutting disc of the dry type sander of the ceiling surface polishing unit mounted on the work deck of the aerial work vehicle that can be raised and lowered can be quickly moved to the ceiling surface to be polished. By making it possible to move the ceiling surface while making stable contact with the ceiling surface, it is possible to efficiently perform cleaning work on the ceiling surface. In addition, since the lifting mechanism 42 of the aerial work vehicle 40 is driven and controlled to raise the work deck 41 on which the ceiling surface cleaning unit 10 is installed, the downward ceiling surface 50 on which the cleaning work is performed is raised to a considerable height. Even if the ceiling surface 50 is located at a certain position, the cutting disk 36a of the dry type sanding machine 30 can be easily reached and the ceiling surface 50 can be cleaned.

Note that the present invention is not limited to the above embodiments, and various changes can be made. For example, the concrete structure whose ceiling surface is polished by the ceiling surface cleaning method of the present invention does not necessarily have to be a box culvert type road tunnel, but the concrete structure may be a concrete girder of a concrete bridge, etc. The bottom surface portion can also be used as the ceiling surface to be polished by the ceiling surface cleaning method of the present invention. Additionally, out of the four distance sensors placed on the four sides of the base frame, three of the distance sensors can be used to control the lifting and lowering of the jack so that the distance to the ceiling remains the same. can.

1 Ceiling surface cleaning vehicle 10 Ceiling surface cleaning unit 11 Base frame section 12 Upper frame section 12a Side channel steel 12b Intermediate channel steel 13 Lower frame section 14 Connection frame section 15 Lifting jack 15a Drive main body section 15b Telescoping Part 15c Installation board part 16 Distance sensor 17 Contact sensor 18 Moving rail part 18a Left-right rail member 18b Front-rear rail member 30 Dry type sanding machine 31 Traveling base part 31a Traveling wheel 31b Traveling drive device 32 Load cell 33 Intermediate plate part 34 Air Cylinder 35 Grinding machine mounting plate 36 Grinding machine body 36a Cutting disc 36b Suction dust collector 36c Drive motor 40 Aerial work vehicle 41 Work deck (support frame)
42 Lifting mechanism 43 Loading platform portion 44 Roller jack 44a Roller portion 46 Traversing frame portion 46a Long side channel steel 46b Running wheels 46c Traveling drive device 47 Overhang support plate 48 Standing rod 50 Ceiling surface 51 Road surface X Long side direction ( Longitudinal direction)
Y Short side direction (left/right direction)

Claims (4)

A ceiling surface cleaning method using a ceiling surface cleaning vehicle configured by mounting a ceiling surface cleaning unit equipped with a dry-type sander on a liftable work deck of an aerial work vehicle, the method comprising:
The ceiling surface polishing unit includes a base frame section, the dry sanding machine, a moving rail section provided on the upper surface of the base frame section for moving the dry sanding machine, the base frame section and the dry sanding machine. Lifting jacks are interposed between the work deck and installed on the four sides of the base frame, and distance sensors are installed on the four sides of the base frame to measure the distance to the ceiling surface in a non-contact manner. , at least two contact sensors arranged on both sides of the dry sanding machine to detect contact with the ceiling surface;
a step of driving the aerial work vehicle in a state where the work deck is not raised and moving the ceiling surface cleaning vehicle to a location to be polished on the ceiling surface;
At the moved ceiling surface cleaning location, the work deck is raised to place the ceiling surface cleaning unit close to the ceiling surface, and the distance to the ceiling surface is measured by the distance sensor in a non-contact manner. and controlling the drive of the lifting jack to adjust the inclination of the ceiling surface polishing unit so that the traveling surface of the dry type sanding machine by the movable rail section is arranged parallel to the ceiling surface; After adjusting the inclination of the ceiling surface polishing unit, the lifting jacks installed on all four sides are simultaneously driven to maintain the running surface of the dry type sanding machine parallel to the ceiling surface, and the contact Raising the ceiling surface cleaning unit until the sensor comes into contact with the ceiling surface, and then moving the dry type sander onto the moving rail section while pressing the cutting disc of the dry type cleaner against the ceiling surface. A method for cleaning a ceiling surface using a ceiling surface cleaning vehicle, which includes the step of cleaning the ceiling surface at the location to be polished by moving the vehicle along the same direction. In the step of adjusting the inclination of the ceiling surface polishing unit so that the running surface of the dry type sanding machine by the movable rail section is arranged parallel to the ceiling surface, two lifting jacks provided on one side are used. After controlling the expansion and contraction of the jacks so that the running surface in the direction perpendicular to the direction in which the two lifting jacks are lined up is parallel to the ceiling surface in the same direction, the By controlling the expansion and contraction of the two lifting jacks installed on one side in the direction in which the two lifting jacks are lined up, the running surface in the direction perpendicular to the direction in which these two lifting jacks are lined up is 2. A ceiling surface cleaning method using a ceiling surface cleaning vehicle according to claim 1, wherein the vehicle is adjusted so as to be arranged parallel to the ceiling surface in the same direction. In the step of raising the ceiling surface polishing unit until the contact sensor comes into contact with the ceiling surface while keeping the running surface of the dry type sanding machine parallel to the ceiling surface, the step of raising the ceiling surface polishing unit until the contact sensor contacts the ceiling surface, 3. The ceiling surface cleaning method using a ceiling surface cleaning vehicle according to claim 1 or 2, wherein when the sensor comes into contact with the ceiling surface, driving of all the lifting jacks is controlled to automatically stop at the same time. The above-mentioned aerial work vehicle is equipped with roller jacks provided at four corner areas of the loading platform thereof,
By moving the dry type sanding machine along the moving rail part, after the step of cleaning the ceiling surface at the cleaning location, a state where the running surface of the dry type sanding machine is arranged parallel to the ceiling surface is achieved. With the lower end rollers of the four roller jacks in contact with the road surface, the roller jack is operated at low speed to the next adjacent grinding point, and the ceiling surface grinder installed on the work deck is A ceiling surface cleaning method using a ceiling surface cleaning vehicle according to any one of claims 1 to 3, including the step of moving the cleaning unit to the next cleaning location.

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