JP5140647B2 - Dust collection method, dust collection device, and road cleaning vehicle - Google Patents

Description

  The present invention relates to a dust collection method, a dust collection device, and a road cleaning vehicle, and more particularly, to a technique of a type that includes a rotating brush that contacts a road surface, cleans the road surface while sprinkling water, and collects dust together with water. .

In a road cleaning vehicle, a rotating brush is provided on the side of the vehicle body, the rotation center of the rotating brush is provided with a substantially vertical rotation center, and the cleaning surface (brush surface) of the rotating brush is a gutter on the side surface and the bottom surface. Contact. The water injection port at the tip of the water supply pipe connected to the water supply source is located in front of the rotary brush, and water is sprayed from the water injection port to the road surface just before the rotary brush. By sweeping, the dust is collected in a duct together with water by a suction method or the like. The road sweeper has a water tank, but the water spraying capacity is insufficient. Run a road sweeper to perform cleaning work. In addition, a technique has been proposed in which water mixed with a surfactant is sprinkled to increase the efficiency of watering (Patent Document 1), or water is not used at all by devising the arrangement of the duct structure and brush ( Patent Document 2).
JP 2002-81035 A Japanese Patent Laid-Open No. 11-93127

  Since the normal road cleaning work method is a work of a combination of a road cleaning vehicle and a water truck, there is a concern that the road surface is occupied widely and traffic congestion is caused. In the operation of only the road cleaning vehicle, it is necessary to cover the required amount of water only with the water tank provided in the road cleaning vehicle, and it is necessary to suppress the amount of water sprayed. In this case, it is difficult to suppress dust. That is, when water-saving spraying is performed, there is a concern that the sprayed water splashes before reaching the road surface due to the traveling wind speed and the number of rotations of the brush. And in the conventional road surface cleaning car, watering from a water injection port is performed in the near position (refer FIG.4 and FIG.5 of patent document 1, and FIG. 9 of patent document 2), and watering a road surface beforehand. Therefore, it was based on the idea to suppress the generation of dust caused during the scrub sweeping by the rotating brush. However, according to the inventor's actual running test, it is necessary to reduce the amount of water in a cleaning operation with a road cleaning vehicle alone without a water truck. It was found that it could not be moistened and the generation of dust could not be suppressed. Although the idea of incorporating a surfactant as in Patent Document 1 will be effective in suppressing dust, surfactants in general cannot be used to avoid concerns about secondary contamination with surfactants. The selection needed to be careful and was not necessarily common.

  The present invention has been made in view of the above problems, and an object of the present invention is to achieve efficient dust collection while suppressing the amount of water spray and without additives.

  According to the present invention, a method of scraping and collecting dust on a road surface by rotating a brush while sprinkling water from a water supply source, wherein the water spray is directly directed to the rotating brush. The dust collection method characterized by the above is provided.

  According to the present invention, the rotating brush for cleaning the road surface, the water supply pipe connected to the water supply source, the water injection port installed at the tip of the water supply pipe, and the collection of the dust scraped up by the rotary brush In the dust collecting apparatus including a duct, the dust collecting apparatus is provided in which the water jetting port is arranged so that the jetted water from the water jetting port is directly directed to the rotating brush. .

  Further, according to the present invention, a road surface cleaning vehicle for cleaning a road surface, particularly a gutter, having a rotation center substantially in the vertical direction, and a cleaning brush that contacts the gutter on the side surface and the bottom surface; Driving means for rotating the rotating brush inwardly around the rotation center, a guide plate extending laterally of the rotating brush on the side away from the gutter from the front of the rotating brush, and guiding on the downstream side in the rotating direction A suction duct connected to the plate; a water supply line connected to a water supply source; and a water injection port installed at a tip of the water supply line. There is provided a road sweeper characterized in that it is arranged so as to be directed directly to the road.

  In the road cleaning vehicle, the water jet port may be positioned in front of the rotating brush.

  In the present invention, water is sprayed directly from the water injection port toward the rotating brush, and the sprinkled water travels down the bristles of the rotating brush and flows down and is scattered by the centrifugal force of the rotating brush. The road surface is subjected to a scraping sweep. The brush that has been sprayed with water sweeps up the dust that is being scraped and swept by rotation, so the water sprayed on the brush can be brought into contact with the dust not only from the surface layer but also from the inside, so the entire dust that has been swept up It can be moistened and has an effect of being able to be collected in the duct while efficiently suppressing the dust from being rolled up.

FIG. 1 is a schematic perspective view of a road sweeper according to the present invention. FIG. 2 is a schematic perspective view of a portion in the vicinity of the rotating brush 10 in the road sweeper of the present invention. FIG. 3 is a side view for explaining the positional relationship between the watering nozzle 28 and the rotating brush 10.

  Hereinafter, embodiments of the present invention in a suction recovery type road cleaning vehicle will be described. However, the technical idea of the dust recovery of the present invention is not limited to the suction recovery type road cleaning vehicle. It can also be applied to general dust collection devices beyond cleaning vehicles. In FIG. 1, the code | symbol 1 is a gutter, and a gutter is located in the intersection of a road surface and a curbstone here, and means the side groove | channel of L cross section. 2 schematically shows a suction recovery type road cleaning vehicle, a rotary brush 10 is provided on the side of the lower surface of the vehicle body, and the rotary brush 10 is moved along the gutter 1 on the side of the road while traveling, The road surface is scraped and swept on the side surface and the bottom surface of the rotating brush 10, and dust accumulated on the road surface is scraped and collected.

  FIG. 2 is a perspective view showing only the main part of the present invention. The rotary brush 10 has a substantially vertical rotation center L, and bristles 14 are implanted on the lower surface of the substrate 12 so that the outer surface has a substantially conical shape. Configured. As schematically shown in FIG. 3, the substrate 12 is provided with a rotating shaft 16, and the rotating shaft 16 is supported by a bracket (not shown) extending in a cantilever manner from the vehicle body. Connected to a possible drive motor 18, the rotary brush 10 is driven to rotate around the vertical rotation center L as indicated by an arrow f. The guide plate 20 is fixed to the vehicle body side by well-known means. In FIG. 2, the guide plate 20 includes a front wall 20-1 extending in the vehicle body lateral direction between the front wheel 22 of the road cleaning vehicle and the rotary brush 10, and a front wall 20 -1 and a side wall 20-2 extending rearward from the front wall 20-1 at the inner side of the rotary brush 10. A dust collection duct 24 is opened behind the rotary brush 10 so as to be continuous with the guide plate 20, and collection into the duct 24 is performed along the guide plate 20 as indicated by a white arrow h. As the recovery method, a suction pump provided inside and recovering under suction can be easily adopted, but the recovery method is not necessarily limited to the suction method. The dust collection duct 24 is connected to a dust separator and a hopper (not shown) provided on the vehicle body, so that the dust and water are separated. One end of the water supply pipe 26 is connected to a water supply source such as a water supply pump 30 (FIG. 3) installed on the vehicle body, receives water supply as indicated by an arrow g, and a nozzle 28 (the water jet of the present invention) at the other end of the water supply pipe 26. Mouth). The nozzle 28 is provided for watering. In this embodiment, the nozzle 28 is arranged at a position behind the front wall 20-1 of the guide plate 20 but in front of the rotary brush 10. The installation position of the nozzle 28 is not necessarily limited to the position in front of the rotary brush 10, and can be a desired position where the desired dust collection effect can be obtained.

  As shown in FIG. 3, the water under pressure is sprinkled in a fan shape like F from the nozzle 28, but the arrangement of the rotary brush 10 with respect to the nozzle 28 is such that the water sprayed from the nozzle 28 is directed to the bristles 14 of the rotary brush 10. This is done so that substantially the entire amount of water ejected from the nozzle 28 is brought into direct contact with the portion of the bristles 14 on the front surface of the rotating brush 10. On the other hand, in the conventional watering method described in FIGS. 4 and 5 of Patent Document 1 and FIG. 9 of Patent Document 2, the nozzle is represented by an imaginary line 28A, and the watering from the nozzle 28A is a road surface like FA. The arrangement was such that the water was not directly sprinkled on the rotating brush 10. In the case of this conventional arrangement, the water spray FA is only performed locally on the surface of the dust accumulated on the road surface and does not penetrate inside the accumulated dust. There is a problem in that it is easily wound up as dust by the rotation of the downstream rotating brush 10.

  In the present invention, water is sprayed from the nozzle 28 toward the bristles 14 of the rotary brush 10 as shown by arrow F, and the sprinkled water flows down the bristles 14 of the rotary brush and flows down. While being scattered by the centrifugal force of 10, the road surface is scraped and swept by the rotating brush. Since the brush 10 that has been sprinkled can also come into contact with dust that is being scraped and swept, the spray water F to the rotating brush 10 is wetted by dust not only from the surface layer but also from the inside, and the effect of the water spray is increased. Therefore, it is possible to effectively collect the dust into the duct 24 while suppressing the dust from being rolled up. Moreover, since the water from the watering nozzle 28 cools the bristle brush 10 and reduces the cooling effect and frictional force of the water, the life of the brush can be extended. Further, the water from the watering nozzle 28 is described as being sprayed in a fan shape (conical shape), but it is also possible to spray the water toward the rotary brush 10 in a substantially straight line. Is a fitness factor. Further, the number of watering nozzles 28 is not limited to one, and a plurality of watering nozzles 28 can be installed as appropriate, and the number of nozzles and the installation site are selected so as to obtain an optimum effect. Furthermore, the number of rotations of the rotating brush 10 and the pressure and flow rate of the water sprayed from the watering nozzle 28 are also conforming factors for obtaining an optimum effect.

DESCRIPTION OF SYMBOLS 1 ... Gutter 10 ... Rotary brush 12 ... Board | substrate 14 ... Bristle 16 ... Rotary shaft 18 ... Drive motor 20 ... Guide plate 22 ... Front wheel 24 ... Dust collection duct 26 ... Water supply pipe 28 ... Nozzle

Claims (3)

A method of scraping and collecting dust on a road surface by rotating a brush while sprinkling water from a water supply source, wherein the water spray is located in front of the rotating brush and the center line is perpendicular to the vertical line. Dust that is formed using a water spray port that forms a water jet that is inclined rearward, so that substantially the entire amount of water sprayed from the water spray port is directed directly to the rotating brush. Collection method. A dust collecting apparatus for carrying out the method according to claim 1, comprising a rotary brush for cleaning a road surface, a water supply line connected to a water supply source, and a water injection port installed at the tip of the water supply line When, and a recovery duct scooped up dust by the rotating brush, the dust collection device for scraping and collecting the dust on the road surface by rotating the brush while sprinkling water from the water source, water supply conduit The front end of the rotary brush forms a backward bent portion at a front position of the rotating brush, and the water injection port provided in the bent portion is arranged so that the water sprayed from the water injection port is opposed to the rotary brush, and the water injection Dust collection, characterized in that the centerline of the water spray from the mouth is inclined backwards with respect to the vertical line, and the sprinkling is directed directly to the rotating brush for substantially the entire amount of water sprayed from the water jet apparatus. Comprising a dust collecting apparatus according to claim 2, a road sweepers for cleaning the gas Potter, rotating brushes essentially comprises a vertical rotational center, and rotating brushes that cleaning surface side and The dust collecting device is further configured to contact the gutter on the bottom surface, and further includes a driving means for rotating the rotating brush inwardly around the rotation center, and a rotating brush side on the side away from the gutter from the front portion of the rotating brush. A road cleaning vehicle comprising a guide plate extending in the direction and a dust collecting duct connected to the guide plate on the downstream side in the rotation direction.

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