JP2019124041A - Road surface cutting device and road surface cutting method - Google Patents

Abstract

To provide a road surface cutting device and a road surface cutting method capable of effectively suctioning dust.SOLUTION: A road surface device 10 is configured to cut a road surface by rotating a circular blade 12. The road surface device includes: a blade cover 14 for accommodating at least a part of the blade 12 in a space provided between the cutting surface and the road surface during cutting of the road surface; a spraying means 16 for spraying a liquid into a space; and a suction means 18 for suctioning a space.SELECTED DRAWING: Figure 1

Description

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

  In order to replace the old manhole cover and receptacle, the road surface around the manhole is cut off, removed, replaced with a new manhole cover and receptacle, and then the road surface around the manhole is filled with a filler. .

  Patent Document 1 describes a road surface cutter 100 on which a curved blade 101 is mounted and tilting means for tilting a cover for storing the same up and down with respect to the road surface. The road surface cutter 100 can cut the road surface by tilting the blade 101 rotated by the motor toward the road surface.

JP, 2014-5601, A

  However, a method for effectively sucking dust generated when cutting a road surface such as asphalt is under development.

  The inventors of the present application connected the suction means to the cover of the blade and conducted an experiment to suction dust generated by cutting, but if the road surface is uneven, a large gap is formed between the cover and the road surface In some cases, dust may rise to the outside.

  On the other hand, if the road surface is cut while supplying a large amount of water, dust can be prevented from rising into the atmosphere, but a large amount of polluted water contaminated with dust will flow out to the surroundings, so contamination of the vacuum with contaminated water Suction work and cleaning will be required. However, it was also found that dust can not be effectively aspirated if only a small amount of water is supplied locally only.

  Then, an object of this invention is to provide the road surface cutting device and the road surface cutting method which can attract | suck effectively the dust which generate | occur | produces when cutting a road surface.

  The road surface cutting device according to an aspect of the present invention is a road surface cutting device that cuts a road surface by rotating a circular blade. And, a cover for providing a space between the road surface and at least a part of the blade during cutting of the road surface, a spraying means for spraying liquid in the space, and a suction means for sucking the space And.

  According to this aspect, the cover for containing at least a part of the blade in the space provided between the road surface during cutting of the road surface, the spraying means for spraying the liquid in the space, and the suction for the space Since it is equipped with the suction means, it is possible to suppress the rising of the dust without requiring a large amount of water, and to suction the dust effectively. Furthermore, the blades can be cooled with the liquid to be sprayed.

  Here, "fog" refers to a state in which a large number of small liquid particles float 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. In addition to the mist, a non-mist liquid may be supplied.

  In addition, the blade includes a curved surface and a back surface, and a plurality of outer peripheral blades provided on the side surface connecting the surface and the back surface, and the spraying means is configured to supply the fog toward the side surface of the blade. It may be Alternatively, it may be a disk blade whose front and back surfaces are flat.

  According to this aspect, since the spraying means supplies the mist toward the side of the blade, it becomes possible to supply the mist to both the front and back sides of the blade. As a result, water flows into both sides of the cutting groove as the blade rotates, so dust can be effectively prevented from rising.

  Here, the “curved surface” of the “blade” means that the cross section including the rotation axis of the blade includes a curve. The curves include, for example, higher order curves such as arcs or parabolas, but some may be straight. When the cross section including the rotation axis of the blade is an arc, the curved surface of the blade includes a spherical surface.

  In addition, the cover may include a frame facing the road surface and a side face connected to the frame and extendable in a direction perpendicular to the road surface during cutting of the road surface by the blade.

  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 stretchability of the side surface. For this reason, dust can be prevented from rising outside the cover.

  Here, “connection” is not limited to direct connection, but also includes indirect connection by interposing another object.

  Moreover, the road surface cutting device according to one aspect of the present invention cuts the road surface by rotating a circular blade. And a cover for providing a space for accommodating a part of the blade during cutting of the road surface, and a spraying means for spraying a 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 the rising of the dust without requiring a large amount of water and to suction the dust effectively.

  Moreover, the road surface cutting method according to an aspect of the present invention is a road surface cutting method in which a road surface is cut by rotating a circular blade. And, while holding a part of the blade in the space provided between the cover and the road surface, spraying the liquid into the space and rotating the blade to cut the road surface while suctioning; Including.

  According to this aspect, the fluid is sprayed into the space in the cover and the blade is rotated to cut the road surface while suctioning, so that it is possible to suppress the dust from rising without requiring a large amount of water, and dust Can be effectively aspirated.

  According to the present invention, it is possible to provide a road surface cutting device and a road surface cutting method capable of effectively sucking dust.

A perspective view of the road surface cutting device 10 according to the first embodiment Side view of the blade cover 14 according to the first embodiment The perspective view of blade 12 concerning a 1st embodiment

First Embodiment
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same element and the overlapping description is abbreviate | omitted. In addition, the following embodiments are exemplifications for describing the present invention, and the present invention is not limited to the embodiments. Furthermore, the present invention can be variously modified without departing from the scope of the invention.

  FIG. 1 is a perspective view of a road surface cutting device 10 according to this 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), spraying means 16 for spraying a liquid into a space in the blade cover 14 and supplying a mist, and the inside of the blade cover 14. And suction means 18 for suctioning the space.

  The spraying means 16 comprises 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. There is provided a nozzle 16D for atomizing the water passing through the tube 16C and feeding it into the blade cover 14. The nozzle 16D supplies misty liquid into the blade cover 14 by discharging low pressure or high pressure water from a plurality of holes having a small cross section. 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 portion 14A and a plate-like fringe portion 14B provided so as to extend in the horizontal direction parallel to the road surface from the lower end of the main body portion 14A. And a bellows 14C (an example of an “stretchable portion”) connected to the outer edge of the fringe portion 14B and extending and contracting in a direction perpendicular to the road surface, and a rectangular frame shaped stable portion 14D connected to the lower end of the bellows 14C (“frame Section), four shafts 14E1 to 14E4 fixed to four corners of the stable section 14D and provided in a direction perpendicular to the road surface, and for sucking dust in the blade cover 14 by the suction unit 18. The connection unit 14F is provided.

  The main body portion 14A includes two substantially semicircular side surfaces and a cylindrical upper surface connecting the two side surfaces. The main body portion 14A is provided to be slightly larger than the blade 12 so as to be able to accommodate the blade 12 therein, and is formed to have a radius larger by about 10 to 50 mm than the radius of the blade 12 in a side view, for example. . The main body portion 14A and the fringe portion 14B can be provided by resin, metal or the like. In the present embodiment, the main body portion 14A and the fringe portion 14B are provided by a metal having a higher soundproof effect.

  The bellows 14C is provided from cloth, metal, plastic or the like, and can be expanded and contracted in the direction perpendicular to the road surface by providing a structure in which mountain folds and valley folds are repeated. The stable portion 14D connected to the lower end of the bellows 14C is provided from wood, metal or the like having a weight sufficient 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 at the four corner portions of the fringe portion 14B. The shafts 14E1 to 14E4 respectively pass through the respective through holes to restrict horizontal movement of the fringe portion 14B and the main body portion 14A integrally formed with the stable portion 14D, and the bellows 14C. Has a function to guide the expansion and contraction direction of Further, since the tops of the shafts 14E1 to 14E4 are formed larger than the hole diameter of the through hole, the main body 14A is configured so as not to be separated from the stable portion 14D above the heights of the shafts 14E1 to 14E4. ing.

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

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

  In the present embodiment, the nozzle 16D is positioned at approximately 120 degrees (approximately 60 degrees in elevation), assuming that the angle at which the blade 12 emerges from the road surface to the ground is 0 degrees on the basis of the rotation axis AX. , The rotational axis AX is provided to face obliquely downward.

  The nozzles 16D are provided in the upper half area of the blade cover 14 (in this embodiment, about 85% of the height of the blade cover 14), and thus supply fog to a wide area of the space in the blade cover 14. be able to. In addition, since fog is supplied to the blade 12 which intrudes into the road surface from now on, it may be expected that the sharpness of the blade 12 can 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 where the rotation axis AX is present, from a position of 90 degrees just above the rotation axis AX. Alternatively, the nozzle 16D may be provided to face horizontally or obliquely upward from the area of the lower half of the blade cover 14. Also, a plurality of nozzles may be provided.

  Further, with respect to the position of the nozzle 16D in the rotation axis AX direction, the nozzle 16D is preferably installed at a position facing the side surface on which the outer peripheral blade of the blade 12 is provided. This makes it possible to supply fog to both the front and back of the blade 12.

  As described later, in the present embodiment, the blade 12 has a spherically curved surface. Therefore, the position in the direction of the rotation axis AX advances as the distance from the center of the blade 12 approaches the outer periphery. For this reason, in the present embodiment, the nozzle 16D is provided at a position apart from the center in the rotation axis AX direction of the side surface forming the cylindrical surface of the main body portion 14A.

  As a result of the above configuration, the mist is supplied toward the center of the blade 12 from the nozzle 16D provided at a position separated by about 10 to 50 mm from the side on which the outer peripheral blade of the blade 12 is provided.

  Furthermore, the blade cover 14 is provided with a connection portion 14F for suctioning dust in the blade cover 14 by 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 connection portion 14F is provided with the connection portion 14F at a position where the blade 12 emerges from the road surface to the ground. ing. The connection portion 14F communicates with the space in the blade cover 14 and is provided with an upward opening. Therefore, by performing suction from this opening, dust that rises on the ground can be effectively sucked as the blade 12 rotates.

  In addition, the opening of the connection portion 14F and the nozzle 16D are provided in different regions when the space in the blade cover 14 is bisected in a plane perpendicular to the road surface including the rotation axis AX (in FIG. 2, the nozzle 16D Is provided on the left side of the rotation axis AX, and the opening of the connection portion 14F is provided on the right side of the rotation axis AX). Therefore, it can be suppressed that the mist supplied from the nozzle 16D is sucked without being diffused into the space in the blade cover 14.

  However, the present invention is not limited to this. For example, the nozzle 16D may be provided at the center and a plurality of openings may be provided at the end to promote the diffusion of the fog.

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

  Contaminated water containing dust in the blade cover 14 flows into the separation means 18B through the tube 18A by the pump 18E. The separation means 18B is for separating polluted water on the principle of a cyclone which separates by centrifugal force, and has a side face part having a circular horizontal cross section whose area gradually decreases downward as well as on this side face Among the polluted water rotating along the opening, an opening provided at the connection with the dust collection box 18C (“the lower An example of the opening "and an opening (an example of the" upper opening ") provided for discharging from the upper side the gas and the particles that are not discharged to the dust collection box 18C are formed. The upper opening communicates with the tube 18D, and the other end of the tube 18D communicates with the pump 18E. However, it is also possible to use a suction method other than the cyclone type. For example, a vacuum cleaner such as a double motor type may be connected to the blade cover 14 by a hose to directly suck dust.

  FIG. 3 shows the blade 12. The blade 12 is formed in a circular shape, and turns around the rotation axis AX2 while being rotated by itself about the rotation axis AX, thereby cutting the road surface into a circle. The blade 12 includes a spherical or curved surface 12A and a back surface 12B, and a side surface 12C on which a plurality of outer peripheral blades are formed. The blade 12 is mainly made of copper in which a diamond tip is embedded. The diameter of the blade 12 may be various depending on the application and the like, but has a radius of 250 mm in side view, for example. Moreover, you may use the disk shaped thing for cut | disconnecting a road surface linearly as a braid | blade.

  Also, the road surface cutting device 10 includes a motor for rotating the blade 12, a wheel for moving the blade 12 and the blade cover 14, a tilting means for tilting the blade 12 and the blade cover 14 up and down with respect to the road surface, etc. Is equipped.

  Below, the road surface cutting method which cut | disconnects the iron cover and outer frame of a manhole which needs repair | repair on a round spherical surface on the surrounding pavement using such a road surface cutting device 10 is demonstrated.

  First, a center jig for engaging the road surface cutting device 10 is fixed to the center of the target manhole, and the center jig of the road surface cutting device 10 is engaged with the center jig.

  Then, while lowering the blade 12 whose upper part is stored in the blade cover 14 and the blade cover 14 in the direction of the road surface using the tilting means, the cutting of the road surface is started by rotating the blade 12 about the rotation axis AX. Do.

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

  At the same time, 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 as a mist into the main body 14A of the blade cover 14. Since the nozzle 16D faces the side surface 12C of the blade 12, a part of the mist jetted from the nozzle 16D adheres to both the front surface 12A and the back surface 12B of the blade 12 to promote cooling of the blade 12 and , To suppress the sharpness. In addition, the means to spray is not restricted to this.

  In addition, since the mist adheres to the front surface 12A and the back surface 12B of the blade 12, water enters both sides of the cutting groove. Such moisture is absorbed by dust such as asphalt powder and aggregate powder generated by cutting to become wet particles, so that the dust is prevented from rising. For this reason, it can control that dry dust etc. scatter in the atmosphere and reach a living environment.

  The pump 18E sucks moist dust and the like from the opening provided in the connection portion 14F of the blade cover 14. The suctioned dust or the like rotates and descends along the side surface of the separation unit 18B, and is discharged to the dust collection box 18C from the opening provided below. For this reason, the dust etc. which arose by cutting | disconnection can be collect | recovered efficiently and can be discarded. The gas and particulates that are not recovered are drawn into the pump 18E through the tube 18D from the opening provided above.

  Then, the road surface cutting device 10 is centered on the rotation axis AX2 passing through the center of the manhole while engaging with the center jig that is fixed to the center of the manhole and includes a shaft portion erected in the vertical direction from the center of the manhole. To turn. Along with this, the blade cover 14 and the blade 12 also pivot about the manhole.

  At this time, even if the road surface is uneven or has a difference in height, the stable portion 14D can be inclined according to the road surface since the bellows 14C is provided. For this reason, the gap with the road surface can be suppressed. Further, since the shafts 14E1 to 14E4 restrict the horizontal movement of the fringe portion 14B and the main body portion 14A integrally formed with the shaft with respect to the stable portion 14D, the bellows 14C expands and contracts smoothly and flexibly. It is possible to

  By turning the center of the manhole several times, the iron cover and outer frame of the manhole can be cut on a circular spherical surface together with the surrounding pavement. Thereafter, the cut chunks are separated, lifted and removed, and then a new manhole is provided and the periphery is filled with mortar or the like to complete the repair of the manhole.

  As described above, since the mist is supplied from the nozzle 16D into the blade cover 14, it is possible to uniformly supply water to the front and back surfaces of the blade 12 as compared to the case of supplying water. As a result, it is possible to suppress the dust from rising. However, the fog may be supplied only to the front surface or the rear surface of the blade 12. Also, the mist may be supplied using a plurality of nozzles.

  Further, since the dust and the like are suctioned from the position where the blade 12 comes out from the road surface, the diffusion of the dust and the like can be suppressed. However, dust etc. may be sucked from different positions.

  Further, since the suctioned dust and the like are centrifuged and collected based on the principle of the cyclone using the separating means 18B, it is possible to efficiently collect the wet dust and the like. As a result, the load on the pump 18E can be reduced. In addition, maintenance such as clogging of the filter of the pump 18E is reduced.

  In addition, since the mist is supplied, the polluted water remaining on the road surface is also limited. For this reason, the amount of water required for cleaning after work is reduced, and the time and effort for cleaning is also reduced.

  Since the blade cover 14 has a cylindrical shape in accordance with the shape of the blade 12, the volume of the space in 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. For example, the shape of the blade cover 14 may be square to reduce the manufacturing cost.

  Moreover, although the braid | blade 12 was spherical shape, it is not restricted to this, You may apply this invention to the road surface cutting device using a braid | blade with a linear cross section.

  The embodiments described above are for the purpose of facilitating the understanding of the present invention, and are not for the purpose of limiting the present invention. The elements included in the embodiment and the arrangement, the material, the conditions, the shape, the size, and the like of the elements are not limited to those illustrated, and can be changed as appropriate.

DESCRIPTION OF SYMBOLS 10 ... Road surface cutting device, 12 ... Blade, 12A ... Surface, 12B ... Back surface, 12C ... Side, 14 ... Blade cover, 14A ... Body part, 14B ... Fringe part, 14C ... Belly, 14D ... Stable part, 14F ... Connection part , 16 ... spraying means, 16A ... tubes, 16B ... pumps, 16C ... tubes, 16D ... nozzles, 18 ... suction means, 18A ... tubes, 18B ... separating means, 18C ... dust collection box, 18D ... tubes, 18E ... pumps

Claims (9)

In a road surface cutting device which cuts a road surface by rotating a circular blade,
A cover for providing a space between the road surface and at least a part of the blade during cutting of the road surface;
Spraying means for spraying liquid in the space;
Suction means for suctioning the space;
Road cutting device provided with The blade includes a curved surface and a back surface, and a plurality of outer peripheral blades provided on side surfaces connecting the front and back surfaces,
The road cutting device according to claim 1, wherein the spraying means is configured to supply a mist toward the side surface of the blade.   The cover is characterized by including a frame portion facing the road surface and an expandable portion connected to the frame portion and capable of expanding and contracting in a direction perpendicular to the road surface during cutting of the road surface by the blade. The road surface cutting device according to claim 1 or 2.   The said cover is further provided with the main-body part connected to the upper end of the said expansion-contraction part, and the shaft for restrict | limiting the horizontal movement of the said main-body part with respect to the said frame part in any one of Claim 1 to 3 Road surface cutting device as described.   The suction means includes a centrifugal separation unit that separates, by centrifugal force, a suction material containing the liquid, and is provided below the centrifugal separation unit to discharge a part of the suction material that descends due to the centrifugal separation. A separating means having a lower opening and an upper opening for discharging another part of the aspirate not discharged from the lower opening to the outside of the centrifugal separation unit. A road surface cutting device according to any one of Items 1 to 4. The spraying means comprises a nozzle for spraying a mist,
The cover is formed with an opening connected to the suction means,
In the space in which the blade is stored by the cover, the nozzle is provided in one area including the rotation axis and divided into two in a plane perpendicular to the road surface, and the opening is formed in the other area. The road surface cutting device according to any one of claims 1 to 5, characterized in that: A road surface cutting device for cutting a road surface by rotating a circular blade, comprising: a cover for providing a space for accommodating a part of the blade during cutting of the road surface;
Spraying means for spraying a liquid into the space;
The road surface cutting device is provided with an opening connected to suction means for suctioning the atmosphere in the space on the cover. In the road surface cutting method of cutting a road surface by rotating a circular blade,
With at least a portion of the blade housed in the space provided between the cover and the road surface,
Spraying a liquid into the space and rotating the blade to cut the road surface while suctioning the space;
Road cutting methods including.   9. The cover according to claim 8, further comprising: a frame portion facing the road surface during cutting of the road surface by the blade; and an expansion and contraction portion connected to the frame portion and extendable and contractible in a direction perpendicular to the road surface. Road cutting method.

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