JP4147582B2 - Dust collection device for road sweeper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dust collection device for a road cleaning vehicle that blows a return air flow from a blower from an air blowing nozzle over substantially the entire length of a pickup head and collects dust on a road surface.
[0002]
[Prior art]
In a pickup head of a reflux type road surface cleaning vehicle, conventionally, an air flow supplied from a blower through a pressure feeding duct is blown from an air blowing nozzle (orifice port) having a constant angle with respect to the road surface over the entire length of the pickup head. The dust above is raised and sucked and collected from the suction duct at one end of the pickup head to the hopper. There exists a thing disclosed by patent document 1 as such. The pickup head has a pressure-feed duct connected to one end side in the longitudinal direction and a suction duct connected to the other end side so as to eject an air flow from a blowout port (air blow nozzle) continuous over the entire length in the longitudinal direction. It has become. The air outlet has a constant angle with respect to the road surface, but the opening width is narrow on the pumping duct side and the suction duct side is widened to increase the suction capacity on the suction duct side where the amount of dust increases. Yes.
[0003]
Further, although an air blowing nozzle is not provided over the entire length of the pickup head, Patent Document 2 discloses an example in which the angle of the air blowing nozzle with respect to the road surface is not constant. In this, a large number of air blowing nozzles are arranged in the vehicle width direction, and these air blowing nozzles are alternately arranged vertically and at a predetermined angle toward the road surface at predetermined intervals in the width direction. It is arranged in. Then, suction guides (suction ducts) are arranged in the vehicle width direction as shown in FIG.
[0004]
Further, Patent Document 3 discloses a cleaning device for permeable pavement, in which an angle of a nozzle for injecting water toward the permeable pavement surface is changed at a moving speed of the vehicle. Yes. Patent Document 4 is also a cleaning device (pickup head) for water-permeable pavement, and the cleaning device is provided with a nozzle that can be rotated over its entire length. Mouth is formed. In this nozzle, the air injection angle with respect to the pavement surface is changed depending on the cleaning speed. The pickup head is provided with two outlet ducts and two suction ducts symmetrically on both sides of the center in the vehicle width direction.
[0005]
Moreover, in patent document 5, the opening adjustment member which divides | segments the blowing outlet (air blowing nozzle) covering the full width of a pick-up head into a some area, and adjusts the opening degree of a blowing outlet corresponding to each area of an outlet. An air flow adjusting mechanism is provided. The pickup head has a suction duct on the left side, and an air flow adjustment mechanism is provided in the section on the suction duct side of the air outlet. The opening adjustment member (swing plate) swings to adjust the opening in the front-rear direction. The cleaning work according to the amount of dust and road conditions can be performed as possible (see FIG. 2 of Patent Document 5), and the opening adjustment member acts as a throttle for the outlet. In particular, when dust is concentrated on the road shoulder side, the air outlet on the side opposite to the road shoulder side is closed, and the air outlet on the road shoulder side is fully opened to eject an air flow with an increased air volume.
[0006]
[Patent Document 1]
Utility Model Registration No. 2506993 [Patent Document 2]
JP-A-7-247523 [Patent Document 3]
Japanese Patent Laid-Open No. 10-88540 [Patent Document 4]
Japanese Patent Application No. 2002-123534 [Patent Document 5]
Japanese Patent Laid-Open No. 5-321220
[Problems to be solved by the invention]
In the pickup head of the reflux-type road cleaning vehicle described in the prior art, air is blown from an air blowing nozzle having a constant angle with respect to the road surface over its entire length, and dust is sucked from a suction duct at one end of the pickup head. A part of the blown airflow blown out from the air blowing nozzle portion close to the suction duct is sucked into the suction duct before it effectively acts on the road surface, causing unevenness in the cleaning effect in the longitudinal direction of the pickup head and improving the cleaning efficiency. It is falling. In the thing of patent document 1, the improvement of the cleaning effect is aimed at by widening the opening width by the side of the suction duct of a blower outlet, and increasing a blower air flow rate. However, since the angle of the air outlet of the pickup head with respect to the road surface is constant over the entire length, a part of the air flow on the suction duct side is sucked by the suction duct as described above, so that there is a problem that the cleaning efficiency is lowered.
[0008]
In Patent Document 2, a suction duct is arranged to face a plurality of blowing nozzles arranged in the vehicle width direction, and the suction duct is not arranged to be biased to one side in the vehicle width direction. Moreover, in the thing of patent document 3, only the cleaning apparatus which changed the angle of the nozzle which injects water toward a water-permeable pavement surface with the moving speed of a vehicle is disclosed, and an air recirculation type road surface cleaning is disclosed. Not a car pickup head. Patent Document 4 is also a cleaning device for water-permeable pavement, in which the air injection angle of the nozzle formed with the air injection port over the entire length of the pickup head is variable with respect to the pavement surface depending on the cleaning speed, and is constant over the entire length. In addition, the suction duct is not arranged so as to be biased to one side in the vehicle width direction.
[0009]
In Patent Document 5, an air flow adjusting mechanism is provided in a range of the air outlet on the suction duct side, and the opening amount of the air outlet is increased or narrowed according to the cleaning situation by swinging the opening adjusting member. In the range on the duct side and the other range, the angle at which the air flow blows out from the outlet to the road surface is different, but it is not intended to produce a uniform cleaning effect over the entire length of the outlet. .
The problem of the present application is to improve the cleaning efficiency by making it difficult for a part of the airflow from the orifice opening to be sucked into the suction duct in a predetermined range close to the suction duct, and to clean the road surface evenly across the entire width of the pickup head. An object of the present invention is to provide a device for collecting dust and the like of a road cleaning vehicle that produces an effect.
[0010]
[Means for Solving the Problems]
And in the present invention for solving the problems, the partition inside the pickup head over the substantially entire width of the vehicle to an upper pressure chamber by a partition plate and the lower suction chamber, pickup head behind the partition plate rear portion and the partition plate An air blowing nozzle is formed over the entire length of the pickup head between the wind direction plate fixed to the front and fixed to the inside, and a pressure feeding duct for supplying an air flow from the blower is connected to the compressed air chamber. in the recovery device, such as dust, made to communicate with the suction chamber in the longitudinal end portions of the pick-up head suction duct communicating with the suction side, the angle of the rear direction with respect to the road surface of the wind direction plate forming the air blow nozzle, the air Of the total length of the blowout nozzle, the angle θ1 is set in a predetermined range close to the suction duct, the angle θ2 is set in the other range, and the angle θ1> angle. Characterized in that the 2 (claim 1). According to this, the rearward angle θ1 with respect to the road surface of the wind direction plate that forms the air blowing nozzle in a predetermined range close to the suction duct is set to an angle that is closer to the vertical, and the blown air flow from the nozzle portion having the angle θ1 is the road surface. Since the distance between the point acting on the suction duct and the suction opening of the suction duct is farther than when blowing at the angle θ2, the air flow from the blowing nozzle in a predetermined range near the suction duct is less likely to be sucked into the suction duct, and the air Since the flow effectively acts on the road surface, the cleaning efficiency is improved.
[0011]
The angles θ1, θ2 and the predetermined range are set so that the road surface cleaning state in the predetermined range blowing at the angle θ1 and the road surface cleaning state in the other range blowing at the angle θ2 are substantially the same. This range is set (claim 2). As described above, the road surface cleaning state is approximately the same over the entire length of the pickup head, so that there is no unevenness in the cleaning effect in the entire length direction of the pickup head.
[0012]
The predetermined range is 30 to 40% of the total nozzle length (Claim 3). There is a lot of dust on the road shoulder side, and in order to increase the cleaning efficiency, a suction nozzle is generally provided within 30 to 40% from the road shoulder side of the pickup head, so if the predetermined range is set to 30 to 40% accordingly It is effective to prevent the air flow from being sucked by the suction nozzle.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to FIGS. In FIG. 1, a pickup head 2, which is a dust collection device for the road cleaning vehicle 1, is disposed between the front and rear wheels 4 and 5 of the vehicle 3. The pickup head 2 is suspended so as to be movable up and down between a grounding position for grounding with respect to the road surface R shown in FIG. 2 and a storage position spaced from the road surface R (not shown). Reference numeral 6 denotes a side brush (gatab room) that sweeps dust toward the center of the cleaning vehicle 1.
[0014]
The pickup head 2 has an overall length that extends over substantially the entire width of the vehicle 3. The hood main body 7 of the pickup head 2 is welded to the left and right side plates 8 and 9 by bending the front and rear as shown in FIG. A partition plate 13 is provided at the lower end of the front plate 10 and is bent obliquely downward toward the rear between the left and right side plates 8 and 9. The partition plate 13 partitions the inside of the pickup head 2 into an upper compressed air chamber 14 and a lower suction chamber 15. The upper compressed air chamber 14 is formed by being surrounded by the partition plate 13, the left and right side plates 8, 9 and the top plate 12, and the suction chamber 15 is formed by the partition plate 13, the left and right dirt shoes 16, and the rubber front. It is formed surrounded by a flap 17 and a rear flap 18. The dirt shoe 16 is attached to the outside of the left and right side walls 8 and 9 in the vehicle width direction so as to move in contact with the road surface R during cleaning, the front flap 17 is attached to the lower side of the front portion of the partition plate 13, and the rear flap 18 Are respectively attached to the rear side of the rear plate 11 and a wind direction plate mounting body 19 to be described later, so that an air flow blown from an air blowing nozzle (orifice port) 20 to be described later does not leak from the front and rear and the left and right directions. .
[0015]
The other end of the pressure-feed duct 21 that is connected to a blower (not shown) and supplies an air flow is welded to the upper surface of the top plate 12 that is close to the road shoulder in the vehicle width direction (left side of the cleaning vehicle in the present embodiment). It communicates with the pressure chamber 14. Further, in the vicinity of the pressure feeding duct 21 and on the left side (close to the shoulder) of the pressure feeding duct 21, the other end of the suction duct 22 whose one end communicates with the suction side of the blower through a hopper (not shown) passes through the top plate 12. It is welded to the partition plate 13 and communicates with the suction chamber 15. As shown in FIG. 1, the suction duct 22 is connected to a position within 40% from the left side of the entire length of the pickup head 2.
[0016]
The wind direction plate mounting body 19 is laid across the left and right side plates 8 and 9 behind the partition plate 13, and the wind direction plate mounting body 19 has a left and right wind direction so that the angle with respect to the road surface R is different in the entire length of the wind direction plate mounting body 19. As shown in FIG. 2, the air blowing nozzles (orifices) over the substantially entire length of the pickup head 2 between the left and right wind direction plates 23 and 24 and the rear end portion 13a of the partition plate 13, as shown in FIG. Mouth) 20 is formed. As shown in FIG. 3, the wind direction plate mounting body 19 has an intermediate plate 27 interposed between the left and right side plates 25, 26 at a predetermined position of 30 to 40% from the left side corresponding to the position of the suction duct 22. Then, between the left and right side plates 25 and 26 and the intermediate plate 27, as shown in FIGS. 2, 5, and 6, left and right rear plates 28 and 29 connected to the rear plate 11, and left and right upper plates 30 are provided. 31 and left and right lower plates 32, 33 that are inclined so as to be lowered forward from the tips of the left and right upper plates 30, 31 and bent rearward toward the rear plates 28, 29, respectively. Configured. Between the left and right upper plates 30 and 31 of the wind direction plate mounting body 19 and the rear plate 11, a gasket (not shown) is inserted over the entire length. Further, as shown in FIG. 5, the inclined surface 35 of the left lower plate 32 of the wind direction plate mounting body 19 is set to an angle θ1 with respect to the road surface R, and as shown in FIG. The inclined surface 36 is set to an angle θ2 with respect to the road surface R, and the angle θ1> the angle θ2.
[0017]
As shown in FIGS. 3 to 6, the left wind direction plate 23 is provided on the inclined surface 35 of the lower left plate 32 between the left side plate 25 and the intermediate plate 27 of the wind direction plate mounting body 19, and the right wind direction The plate 24 is provided on the inclined surface 36 of the lower right plate 33 across the right side plate 26 and the intermediate plate 27. Thus, the air blowing nozzle 20 is directed toward the road surface R at an angle θ1 within a predetermined range L1 of 30 to 40% from the left side close to the suction duct 22 in the entire length of the air blowing nozzle 20, and the other right side In the range L2, the light is directed toward the road surface R at an angle θ2. As shown in FIG. 4, the lower end positions of the left and right wind direction plates 23 and 24 are straight in the vehicle width direction, and are thus formed between the left and right wind direction plates 23 and 24 and the rear end portion 13 a of the partition plate 13. The opening width of the air blowing nozzle 20 is constant, but may be increased as it approaches the suction duct. The predetermined range and the angle θ1 are a state where the air flow is blown from the air blowing nozzle 20 at the angle θ1 in the predetermined range L1 and the road surface R is cleaned, and the air is blown from the air blowing nozzle 20 at the angle θ2 in the other range L2. It is set to be approximately the same as the state where the flow is blown and the road surface R is cleaned. The angle θ2 is an angle with respect to the road surface R that has been conventionally employed.
[0018]
Next, the operation will be described. The side brush 6 is rotated with the pickup head 2 as a grounding position, and an air flow is blown from the entire length of the air blowing nozzle 20 toward the road surface R. The dust on the road surface R swept away by the side brush 6 is blown up by the air flow, and the dust is sucked by the suction duct 22 and collected by the collection hopper. At this time, the air flow blown from the air blowing nozzle 20 at an angle θ1 in a predetermined range L1 close to the suction duct 22 is blown at a large angle (an angle closer to the vertical) with respect to the road surface R, so the angle θ1 The distance L3 between the point where the blown air flow from the nozzle portion acts on the road surface R and the suction opening of the suction duct 22 is {FIG. 7 (a)}, and the suction opening of the suction duct 22 is blown at an angle θ2. Is less than the distance L4 {(b) of FIG. 7}, a part of the air flow is hardly sucked into the suction duct 22, and the air flow acting on the road surface R is not reduced, and the air flow is reduced to the road surface R. Effectively acting on the road surface R to blow up dust. Further, in the other range L2 away from the suction duct 22, the air flow is blown from the air blowing nozzle 20 at an angle θ2 gentler than the angle θ1, but the air flow is away from the suction duct 22, It effectively blows up dust on the road surface R without being affected by the suction of the suction duct 22. Since the road surface cleaning state by the air flow blown at the angle θ1 in the predetermined range L1 is substantially the same as the road surface cleaning state by the air flow blown at the angle θ2 in the other range L2, the pickup head 2 The occurrence of cleaning unevenness is suppressed over the entire length, and a uniform cleaning effect is produced. According to the applicant, the best results were obtained at an angle θ1 = 65 ° and an angle θ2 = 53 °.
[0019]
【The invention's effect】
As described above, according to the present invention, air is blown out between the rear end portion of the partition plate and the wind direction plate that is fixed in the pickup head at the rear of the partition plate over the substantially entire length of the pickup head. The angle of the rear direction with respect to the road surface of the wind direction plate forming the nozzle and forming the air blowing nozzle is an angle θ1 in a predetermined range close to the suction duct among the air blowing nozzles, and an angle θ2 in the other ranges, Since the angle θ1> the angle θ2, the airflow from the air blowing nozzle is less likely to be sucked from the opening of the suction duct in a predetermined range where the airflow is blown at an angle closer to the road surface. Since the air flow to be applied effectively acts on the road surface, the cleaning efficiency is improved. Further, the angles θ1 and θ2 and the predetermined range are set so that the road surface cleaning state in a predetermined range blowing at the angle θ1 and the road surface cleaning state in the other range blowing at the angle θ2 are substantially the same. Therefore, there is no uneven cleaning effect in the entire length direction of the pickup head. In the case where the predetermined range is set to 30 to 40% of the total length of the nozzle, the predetermined range corresponds to the connection position of the suction nozzle connected to the pickup head. It is effective in preventing airflow inhalation.
[Brief description of the drawings]
FIG. 1 is a plan view showing an outline of a road sweeper equipped with a dust collecting device of the present invention.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a view as viewed from III in FIG. 2;
4 is a cross-sectional view taken along the line IV-IV in FIG. 3;
FIG. 5 is an explanatory view showing a blowing nozzle in a predetermined range.
FIG. 6 is an explanatory view showing a blowing nozzle in a range other than that.
FIG. 7 is an explanatory diagram showing a relationship between a blown air flow at an angle θ1 and a blown air flow at an angle θ2 and a suction duct.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Road surface cleaning vehicle 2 Pickup head 3 Vehicle 13 Partition plate 14 Pressure air chamber 15 Suction chamber 20 Air blowing nozzle 21 Pressure feed duct 22 Suction ducts 23 and 24 Wind direction plate L1 Predetermined range L2 Other range R Road surface θ1 Predetermined range Angle θ2 Angle in other range

Claims (3)

The inside of the pickup head over the entire width of the vehicle is divided into an upper compressed air chamber and a lower suction chamber by a partition plate , and directed toward the front fixed in the pickup head at the rear end of the partition plate and behind the partition plate. An air blowing nozzle is formed over the entire length of the pickup head between the lowering wind direction plate, a pressure-feed duct that supplies the air flow from the blower communicates with the compressed air chamber, and a suction duct that communicates with the suction side of the blower is picked up In a dust collecting device communicating with the suction chamber at one longitudinal end of the head, the angle of the rearward direction with respect to the road surface of the wind direction plate forming the air blowing nozzle is set to the suction of the total length of the air blowing nozzle. An angle θ1 is set in a predetermined range close to the duct, an angle θ2 is set in the other range, and an angle θ1> angle θ2 is set. Car of the recovery device such as dust.   The angles θ1, θ2 and the predetermined range are set so that the road surface cleaning state in the predetermined range blowing at the angle θ1 and the road surface cleaning state in the other range blowing at the angle θ2 are substantially the same. The range of the above is set, The collection device of the dust etc. of the road surface cleaning car of Claim 1 characterized by the above-mentioned.   The said predetermined | prescribed range is 30 to 40% of nozzle full length, The collection | recovery apparatus of the dust etc. of the road surface cleaning vehicle of Claim 1 or 2 characterized by the above-mentioned.

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