JP7367126B2 - Road cutting device and road cutting method - Google Patents

Description

The present invention relates to a road cutting device and a road cutting method.

In order to replace aging manhole covers and receiving frames, the road surface around the manholes is cut and removed, replaced with new manhole covers and receiving frames, and then the road surface around the manholes is filled with filler. .

Patent Document 1 describes a road surface cutter 100 to which a curved blade 101 is mounted and a tilting means for vertically tilting a road surface cutter 100 and a cover that houses the cutter with respect to the road surface. The road cutter 100 can cut into a road surface by tilting a blade 101 rotated by a motor toward the road surface.

Unexamined Japanese Patent Publication No. 2014-5601

However, a method for effectively suctioning dust generated when cutting road surfaces such as asphalt is still under development.

The inventors of the present application conducted an experiment in which a suction means was connected to the cover of the blade to suck up the dust generated by cutting, and found that when the road surface was uneven, a large gap was created between the cover and the road surface. Therefore, dust may be scattered outside.

On the other hand, if the road surface is cut while supplying a large amount of water, it is possible to prevent dust from rising into the atmosphere, but a large amount of contaminated water mixed with dust will flow out into the surrounding area, so it is difficult to remove the contaminated water using a vacuum. Suction work and cleaning will be required. However, it was also found that if a small amount of water is used, the water is only supplied locally, and dust cannot be effectively sucked out.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a road cutting device and a road cutting method that can effectively suck up dust generated when cutting a road surface.

A road cutting device according to one aspect of the present invention is a road cutting device that cuts a road surface by rotating a circular blade. and a cover for providing a space between the road surface and the road surface for accommodating at least a portion of the blade while cutting the road surface, a spraying means for spraying a liquid into the space, and a suction means for sucking the space. and.

According to this aspect, there is provided a cover for accommodating at least a portion of the blade in a space provided between the road surface and the road surface during cutting, a spraying means for spraying liquid into the space, and a spray means for sucking the space. Since the vacuum cleaner is equipped with a suction means, it is possible to suppress the dust from being thrown up and to effectively suck the dust without requiring a large amount of water. Additionally, the blades can be cooled by the sprayed liquid.

Here, "fog" refers to a state in which many small liquid droplets are suspended in the air. However, the liquid is not limited to pure water, and may be an aqueous solution such as tap water or a chemical solution. Further, a non-fog liquid may be supplied together with the mist.

Further, the blade includes a front surface and a back surface made of curved surfaces, and a plurality of peripheral blades provided on a side surface connecting the front surface and the back surface, and the spraying means is configured to supply mist toward the side surface of the blade. You can leave it there. Alternatively, the blade may be a disk whose front and back surfaces are planar.

According to this aspect, the spraying means supplies the mist toward the side surface of the blade, so it becomes possible to supply the mist to both the front side and the back side of the blade. As a result, water flows into both sides of the cutting groove as the blade rotates, so it is possible to effectively suppress dust from being thrown up.

Here, the "curved surface" of the "blade" means that the cross section of the blade including the rotation axis includes a curve. The curve includes, for example, a higher-order curve such as a circular arc or a parabola, but a portion thereof may be a straight line. When the cross section of the blade including the rotational axis is a circular arc, the curved surface of the blade includes a spherical surface.

Further, the cover may include a frame portion that faces the road surface while the blade is cutting the road surface, and a side surface portion that is connected to the frame portion and can expand and contract in a direction perpendicular to the road surface.

According to this aspect, the gap between the cover and the road surface can be reduced even if the road surface is uneven, due to the weight of the frame and the elasticity of the side surface. Therefore, it is possible to suppress dust from being scattered to the outside of the cover.

Here, "connection" is not limited to the case of direct connection, but also includes the case of indirect connection with another object intervening.

Further, a road cutting device according to one aspect of the present invention cuts a road surface by rotating a circular blade. The cover is provided with a cover for providing a space between the road surface and the road surface in which a part of the blade is housed during cutting, and a spraying means for spraying liquid into the space. An opening is provided which is connected to suction means for suctioning.

According to this aspect, by connecting the suction means to the opening, it is possible to suppress dust from being thrown up and to effectively suction the dust without requiring a large amount of water.

Further, a road surface cutting method according to one aspect of the present invention is a road surface cutting method in which a road surface is cut by rotating a circular blade. and a step of cutting the road surface by rotating the blade while spraying and suctioning a liquid into the space with a part of the blade accommodated in the space provided between the cover and the road surface. include.

According to this aspect, the blade is rotated to cut the road surface while spraying and suctioning the liquid into the space inside the cover, so it is possible to suppress the scattering of dust without requiring a large amount of water, and to reduce the amount of dust. can be effectively sucked.

According to the present invention, it is possible to provide a road cutting device and a road cutting method that can effectively suck dust.

A perspective view of a road cutting device 10 according to a first embodiment Side view of the blade cover 14 according to the first embodiment A perspective view of the blade 12 according to the first embodiment

[First embodiment]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the same elements are given the same reference numerals and redundant explanations will be omitted. Moreover, the following embodiments are illustrative for explaining the present invention, and the present invention is not intended to be limited only to the embodiments. Furthermore, various modifications can be made to the present invention without departing from the gist thereof.

FIG. 1 is a perspective view of a road cutting device 10 according to the present embodiment, FIG. 2 is a side view of a blade cover 14 (an example of a "cover"), and FIG. 3 is a blade for cutting a road surface. 12 is a perspective view of FIG.

The road cutting device 10 includes a blade cover 14 for housing the blade 12 (FIG. 3), a spraying means 16 for spraying a liquid into the space inside the blade cover 14 to supply mist, and a spraying means 16 for supplying mist to the space inside the blade cover 14. and a suction means 18 for suctioning the space.

The spraying means 16 includes a tube 16A for sucking water from the tank, a pump 16B for sucking water from the tank via the tube 16A and discharging it at low pressure or high pressure, and a tube 16C for discharging water from the pump 16B. It is provided with a nozzle 16D that turns the water that has passed through the tube 16C into mist and supplies it into the blade cover 14. The nozzle 16D supplies a mist of liquid into the blade cover 14 by discharging low-pressure or high-pressure water from a plurality of holes with a small cross-sectional area. The mounting position of the nozzle 16D will be described later.

As shown in FIGS. 1 and 2, the blade cover 14 includes a semi-cylindrical main body 14A and a plate-shaped fringe part 14B that extends from the lower end of the main body 14A in a horizontal direction parallel to the road surface. , a bellows 14C (an example of an "expandable part") connected to the outer edge of the fringe part 14B and expands and contracts in a direction perpendicular to the road surface, and a rectangular frame-shaped stable part 14D (an example of a "frame") connected to the lower end of the bellows 14C (an example of "part"), four shafts 14E1 to 14E4 fixed to four corners of the stable part 14D and provided in a direction perpendicular to the road surface, and a suction means 18 for sucking dust inside the blade cover 14. A connecting portion 14F is provided.

The main body portion 14A includes two substantially semicircular side surfaces and a cylindrical upper surface connecting these two side surfaces. The main body portion 14A is provided to be slightly larger than the blade 12 so that the blade 12 can be accommodated therein, and is formed to have a radius that is approximately 10 to 50 mm larger than the radius of the blade 12 in a side view, for example. . The main body portion 14A and the fringe portion 14B may be made of resin, metal, or the like. In this embodiment, the main body portion 14A and the fringe portion 14B are made of metal with higher soundproofing effect.

The bellows 14C is made of cloth, metal, plastic, or the like, and has a structure in which mountain folds and valley folds are repeated, so that it can expand and contract in a direction perpendicular to the road surface. Further, the stable portion 14D connected to the lower end of the bellows 14C is made of wood, metal, or the like and has sufficient weight to pull the lower end of the bellows 14C in the direction of the road surface.

Further, as shown in FIG. 1, through holes are formed in the four corners of the fringe portion 14B. The shafts 14E1 to 14E4 pass through the respective through holes to restrict horizontal movement of the fringe portion 14B and the main body portion 14A formed integrally therewith with respect to the stable portion 14D, and prevent the bellows 14C from moving in the horizontal direction. It has the function of guiding the direction of expansion and contraction. Further, since the tops of the shafts 14E1 to 14E4 are formed larger than the diameters of the through holes, the main body portion 14A is configured so as not to be separated from the stable portion 14D by more than the height of the shafts 14E1 to 14E4. ing.

Further, the blade cover 14 includes a support portion for rotatably supporting the blade 12 around the rotation axis AX. A motor is connected to this support portion, and the blade 12 can be rotated in the direction of arrow AR (FIG. 2) around the rotation axis AX.

As shown in FIG. 2, in this embodiment, the nozzle 16D is installed on the cylindrical side surface of the main body portion 14A of the blade cover 14, facing in the direction of the rotation axis AX. The blade 12 cuts the road surface by moving to the right or left in the drawing while rotating in the direction of the arrow AR around the rotation axis AX.

In this embodiment, the nozzle 16D is located at a position of approximately 120 degrees (a position of approximately 60 degrees in elevation) when the angle at which the blade 12 emerges from the road surface to the ground is 0 degrees with reference to the rotation axis AX. The rotation axis AX is provided facing diagonally downward.

Since the nozzle 16D is provided in the upper half area of the blade cover 14 (in this embodiment, at a position of about 85% of the height of the blade cover 14), it supplies mist to a wide area of the space inside the blade cover 14. be able to. Furthermore, since fog is supplied to the blade 12 that is about to enter the road surface, it may be expected that the sharpness of the blade 12 will be improved.

However, the present invention is not limited to this, and for example, the nozzle 16D may be installed so as to face directly below the rotation axis AX from a 90 degree position directly above the rotation axis AX, Alternatively, the nozzle 16D may be provided so as to face horizontally or diagonally upward from the lower half region of the blade cover 14. Further, a plurality of nozzles may be provided.

Further, regarding the position of the nozzle 16D in the direction of the rotation axis AX, it is preferable that the nozzle 16D be installed at a position facing the side surface where the outer peripheral edge of the blade 12 is provided. This makes it possible to supply mist to both the front and back surfaces of the blade 12.

As described later, in this embodiment, the blade 12 has a spherical curved surface. Therefore, the further away from the center of the blade 12 and closer to the outer periphery the position in the direction of the rotation axis AX progresses. Therefore, in this embodiment, the nozzle 16D is provided at a position spaced apart from the center of the cylindrical side surface of the main body 14A in the direction of the rotation axis AX.

As a result of the above configuration, mist is supplied toward the center of the blade 12 from the nozzle 16D provided at a position approximately 10 to 50 mm away from the side surface where the outer peripheral edge of the blade 12 is provided.

Further, the blade cover 14 includes a connecting portion 14F for sucking dust inside the blade cover 14 using the suction means 18.

As shown in FIG. 2, since the blade 12 rotates in the direction of the arrow AR around the rotation axis AX, the connecting portion 14F is provided at a position where the blade 12 comes out from the road surface to the ground. ing. The connecting portion 14F is provided with an opening that communicates with the space inside the blade cover 14 and faces upward. Therefore, by suctioning through this opening, it is possible to effectively suction the dust that is thrown up on the ground as the blade 12 rotates.

Further, the opening of the connecting portion 14F and the nozzle 16D are provided in different areas when the space inside the blade cover 14 is divided into two by a plane that includes the rotation axis AX and is perpendicular to the road surface (in FIG. 2, the nozzle 16D is provided on the left side of the rotation axis AX, and the opening of the connecting portion 14F is provided on the right side of the rotation axis AX). Therefore, it is possible to prevent the mist supplied from the nozzle 16D from being sucked into the space inside the blade cover 14 without being diffused.

However, the present invention is not limited to this, and for example, the nozzle 16D may be provided in the center and a plurality of openings may be provided at the ends to promote the diffusion of the mist.

As shown in FIG. 1, the connecting portion 14F is connected to the suction means 18. The suction means 18 includes a tube 18A communicating with the opening of the connecting portion 14F, a separation means 18B (an example of a "centrifugal separation section") communicating with the other end of the tube 18A, and a collection device provided below the separation means 18B. It includes a dust box 18C, a tube 18D provided above the separation means 18B, and a pump 18E connected to the tube 18D.

The pump 18E causes the dirty water containing dust in the blade cover 14 to flow into the separation means 18B via the tube 18A. The separation means 18B is for separating polluted water using the principle of a cyclone that separates by centrifugal force, and is provided with a side portion having a circular horizontal cross-section whose area gradually decreases toward the bottom. Among the polluted water that rotates along the axis, an opening (a "downward" An opening (an example of an "upper opening") provided in the dust collection box 18C for exhausting gas and particulates that have not been discharged from above (an example of an "upper opening") is formed. The upper opening communicates with tube 18D, and the other end of tube 18D communicates with pump 18E. However, it is also possible to use a suction method other than the cyclone method. For example, a vacuum cleaner such as a double motor type may be connected to the blade cover 14 with a hose to directly suck dust.

FIG. 3 shows the blade 12. The blade 12 is formed in a circular shape, and is used to cut the road surface in a circular shape by rotating around the rotation axis AX2 and rotating around the rotation axis AX2. This blade 12 includes a front surface 12A and a back surface 12B that are spherical or curved, and a side surface 12C on which a plurality of peripheral blades are formed. This blade 12 is mainly made of copper with embedded diamond chips. The diameter of the blade 12 can be varied depending on the application, but for example, the blade 12 has a radius of 250 mm when viewed from the side. Further, as the blade, a disk-shaped blade for cutting the road surface in a straight line may be used.

The road cutting device 10 also includes a motor for rotating the blade 12, wheels for moving the blade 12 and the blade cover 14, and tilting means for tilting the blade 12 and the blade cover 14 up and down with respect to the road surface. It is equipped with

Below, a road surface cutting method will be described in which the iron cover and outer frame of a manhole that requires repair are cut into a circular spherical surface along with the surrounding pavement using such a road surface cutting device 10.

First, a center jig for engaging the road cutting device 10 is fixed at the center of the target manhole, and this center jig and the center portion of the road cutting device 10 are engaged.

Then, while lowering the blade cover 14 and the blade 12 whose upper part is housed in the blade cover 14 toward the road surface using a tilting means, the blade 12 is rotated about the rotation axis AX to start cutting the road surface. do.

At this time, 100 mm to 200 mm of the lower part of the blade 12 is below the road surface, and the rest is above the road surface. Further, the stable portion 14D, which is the lower end of the blade cover 14, faces the road surface and is separated from the road surface by approximately several millimeters. Further, approximately the upper half of the blade cover 14 is housed in a space within the main body 14A, and the lower half of the blade cover 14, which is above the road surface, is housed in a space surrounded by the bellows 14C. Therefore, the portion of the blade 12 above the road surface is housed in a space surrounded by the blade cover 14 and the road surface. Therefore, it is possible to suppress noise such as high-frequency noise generated when cutting the road surface from leaking to the outside.

At the same time, the low-pressure or high-pressure water supplied from the pump 16B to the nozzle 16D passes through a plurality of holes provided in the nozzle 16D, and is supplied into the main body 14A of the blade cover 14 as mist. Since the nozzle 16D faces the side surface 12C of the blade 12, a portion of the mist sprayed from the nozzle 16D adheres to both the front surface 12A and the back surface 12B of the blade 12, promoting cooling of the blade 12, and , suppresses deterioration of sharpness. Note that the means for spraying is not limited to this.

Furthermore, since the mist adheres to the front surface 12A and back surface 12B of the blade 12, water enters both sides of the cutting groove. This moisture is absorbed by the dust such as asphalt powder and aggregate powder generated by cutting and becomes moist particles, thereby suppressing the dust from being thrown up. Therefore, it is possible to prevent dry dust and the like from scattering into the atmosphere and reaching the living environment.

The pump 18E sucks moist dust and the like from an opening provided in the connecting portion 14F of the blade cover 14. The sucked dust and the like descend while rotating along the side surface of the separation means 18B, and are discharged into the dust collection box 18C from an opening provided below. Therefore, dust and the like generated by cutting can be efficiently collected and disposed of. Unrecovered gas and particles are sucked into the pump 18E through the tube 18D from the opening provided above.

Then, while engaging with a center jig fixed to the center of the manhole and having a shaft section vertically erected from the center of the manhole, the road cutting device 10 rotates around a rotation axis AX2 passing through the center of the manhole. rotate. Along with this, the blade cover 14 and the blade 12 also rotate around the manhole.

At this time, even if there are irregularities or height differences in the road surface, since the bellows 14C is provided, the stable portion 14D can tilt according to the road surface. Therefore, the gap with the road surface can be reduced. Further, since the shafts 14E1 to 14E4 restrict horizontal movement of the fringe portion 14B and the main body portion 14A formed integrally therewith with respect to the stable portion 14D, the bellows 14C smoothly and flexibly expands and contracts. It becomes possible to do so.

By turning the center of the manhole several times, the iron cover and outer frame of the manhole can be cut into a circular spherical shape along with the surrounding pavement. After that, the cut chunks are separated and lifted up and removed, a new manhole is installed, and the surrounding area is filled with mortar, etc., thereby completing the repair of the manhole.

As described above, since the mist is supplied from the nozzle 16D into the blade cover 14, it becomes possible to uniformly supply moisture to the front and back surfaces of the blade 12, compared to the case where water is supplied. As a result, scattering of dust can be suppressed. However, the mist may be supplied only to the front surface or the back surface of the blade 12. Further, the mist may be supplied using a plurality of nozzles.

Further, since the blade 12 sucks dust and the like from the position where it emerges from the road surface, it is possible to suppress the dust and the like from spreading. However, dust etc. may be sucked from different positions.

Furthermore, since the separator 18B is used to centrifugally separate and collect the sucked dust and the like based on the principle of a cyclone, it becomes possible to efficiently collect the wet dust and the like. As a result, the load on the pump 18E can be reduced. Moreover, maintenance such as clogging of the filter of the pump 18E is also reduced.

Furthermore, since fog is supplied, the amount of polluted water remaining on the road surface is limited. Therefore, the amount of water required for cleaning after work is reduced, and the effort required for cleaning is also reduced.

Since the blade cover 14 has a cylindrical shape to match the shape of the blade 12, the volume of the space inside the blade cover 14 can be reduced, and the dust collection efficiency can be improved. However, the shape of the blade cover 14 is not limited to this, and may be made into a rectangular shape, for example, in order to reduce manufacturing costs.

Further, although the blade 12 has a spherical shape, the present invention is not limited to this, and the present invention may be applied to a road cutting device using a blade having a straight cross section.

The embodiments described above are intended to facilitate understanding of the present invention, and are not intended to be interpreted as limiting the present invention. Each element included in the embodiment, as well as its arrangement, material, conditions, shape, size, etc., are not limited to those illustrated, and can be changed as appropriate.

DESCRIPTION OF SYMBOLS 10...Road surface cutting device, 12...Blade, 12A...Front surface, 12B...Back surface, 12C...Side surface, 14...Blade cover, 14A...Main part, 14B...Fringe part, 14C...Bows, 14D...Stable part, 14F...Connection part , 16... Spraying means, 16A... Tube, 16B... Pump, 16C... Tube, 16D... Nozzle, 18... Suction means, 18A... Tube, 18B... Separation means, 18C... Dust collection box, 18D... Tube, 18E... Pump

Claims (5)

In a road cutting device that cuts the road surface by rotating a circular blade,
a cover for providing a space between the road surface and the road surface for accommodating at least a portion of the blade while cutting the road surface;
a spraying means for spraying a liquid into the space;
suction means for suctioning the space;
Equipped with
The blade includes a front surface, a back surface, and a side surface on which a peripheral blade is provided,
The spraying means includes a nozzle for spraying mist,
The nozzle is installed in an upper half area of the cover at a position spaced outward from the blade when the blade is viewed from the surface,
The cover is
a main body portion for storing the blade;
a plate-shaped fringe part provided to spread horizontally from the lower end of the main body part;
a frame portion that faces the road surface while the blade is cutting the road surface;
A telescopic part connected to the frame part and the fringe part and capable of expanding and contracting in a direction perpendicular to the road surface,
The shaft further includes a shaft fixed to the frame and passing through a through hole formed in the fringe to restrict horizontal movement of the main body with respect to the frame.
Road cutting equipment. The road cutting device according to claim 1 , wherein the blade has a spherical curved surface . The nozzle is installed facing diagonally downward where the rotation axis of the blade exists, and is spaced apart from the center of the side surface of the cover in the direction of the rotation axis so as to face the side surface where the peripheral blade is provided. The road cutting device according to claim 1 , wherein the road cutting device is installed at a position where the road cutting device is installed at a position where the road cutting device is installed at a position where The road cutting device according to claim 1, wherein a tip of the nozzle does not protrude from the cover . The cover further includes a connection part for sucking dust inside the cover,
The connecting portion is provided with an opening that communicates with the space within the cover,
Claim 1: The nozzle and the opening are provided in different areas when the space inside the cover is divided into two by a plane that includes the rotation axis of the blade and is perpendicular to the road surface. The road cutting device described in .

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