JPH0426641B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a road cleaning device suitable for cleaning roadside deposits such as volcanic ash that easily contain water and harden when dried.

[Conventional technology]

The lower end of a conventional roadside deposit loading conveyor,
A road surface cleaning device in which a rotating brush that sweeps roadside deposits into a loading port provided on the rear surface is attached between guide walls on both sides of the vehicle body whose lower end is in approximately sliding contact with the road surface is disclosed in Japanese Patent Publication No. 51-41782, etc. A road cleaning device is shown in Japanese Patent Publication No. 14362/1973, etc., in which a suction port for a suction pipe to an on-board vacuum storage tank is attached to the front end of a wheeled cover that covers a rotating brush that sweeps roadside deposits forward. ing.

[Problem that the invention seeks to solve]

When using this conventional device to clean volcanic ash that has accumulated on road surfaces,
In the device described in Publication No. 41782, as the rotating brush rotates, some of the volcanic ash attached to the brush bristles is discharged backwards, resulting in a considerable amount of uncleaned material, which must be cleaned again using another cleaning vehicle. In addition, the dust in the volcanic ash tends to spread back and forth, creating a sanitary problem, so if you clean while sprinkling water on the volcanic ash, the amount of volcanic ash adhering to the bristles will further increase, increasing the amount of residue left after cleaning.

In the case of the device described in the latter publication, if the layer of volcanic ash A deposited on the road is thick and the gap t between the surface of the ash and the lower end of the front wall of the second cover 6 is small, as shown in FIG. Because the intake air is restricted by the gap,
The speed of the air flow in the suction pipe 9 decreases, and the settling volcanic ash begins to adhere to the suction port of the suction pipe and grow (this is especially the case when the volcanic ash becomes moist due to rainwater or water spraying). When the adhering mass B grows, the ash suction power decreases and the road surface cannot be completely cleaned. Moreover, if the thickness of the layer deposited on the road is so thick that no gap t is formed, as shown by the chain line D in FIG. 6, it becomes impossible to clean the road surface.

[Means for solving problems]

The present invention addresses this problem, and includes a first cover that forms a box-like body with an open bottom end, with the bottom end of the conveyor case of the conveyor 2 having an open top discharge port inside the vehicle-mounted vacuum storage tank 1 as the front wall. 3 is provided with means for bringing the lower edges of both side walls into approximately sliding contact with the road surface, and a rotating brush 5 for sweeping roadside deposits such as volcanic ash into a loading port provided at the rear surface of the lower end of the conveyor case is installed in the first rotary brush 5. A first vacuum cleaner installed inside the cover, and a second cover 6 forming a box-like body with an open bottom end.
A means is provided for bringing the lower edges of both side walls and the rear wall into substantially sliding contact with the road surface, and a rotary brush 8 for sweeping away roadside deposits forward and upward is attached to the rear inside the second cover. A second vacuum cleaner is formed by connecting a roadside deposit suction pipe 9 to the on-vehicle vacuum storage tank 1 to a second cover portion between the front wall and the rotating brush 8, and the first cover 3 is connected to the second cover 6. Both covers are attached to the vehicle in which the vacuum storage tank 1 is installed so that the conveyor case is towed further forward, and the gap a between the lower end of the front wall of the second cover 6 and the road surface is made smaller than the gap a between the lower end of the conveyor case and the road surface. It is characterized by being smaller than the gap b between the two.

[Effect]

According to the above configuration, roadside deposits such as volcanic ash that are relatively sent into the first cover 3 through the gap b between the lower end of the conveyor case and the road surface due to low-speed driving of a vehicle equipped with a vacuum storage tank are removed by the rotating brush. 5 into the loading port at the lower end of the conveyor case, and loaded into the vacuum storage tank 1 by the conveyor 2. The volcanic ash that adheres to the rotating brush 5 and is discharged to the rear thereof accumulates between the rotating brush and the rear wall of the first cover 3, but some of it is transported back to the loading port of the conveyor case by the rotating brush 5. The remaining volcanic ash is swept away and discharged rearward from the gap c between the lower end of the rear wall of the first cover and the road surface.

In this case, if the roadside sediment (ash) contains rainwater, etc., its specific gravity is high and it solidifies easily, so the ash is easily swept into the loading port of the conveyor case by the rotating brush 5. As a result, roadside deposits adhere to the rotating brush and dry when being sent rearward, thereby reducing the moisture content of the ash discharged rearward from the gap c. In addition, if the roadside deposits are dry, the rotation of the rotating brush 5 will remove the first
The dust generated inside the cover 3 passes through a small air passage formed inside the conveyor case to the vacuum storage tank 1.
Since the dust is sucked by the dust, there is almost no risk of dust coming out outside the first cover.

Moreover, since an air passage is necessarily formed between the surface of roadside deposits discharged from the gap c of the first cover 3 and the lower end of the front wall of the second cover 6, the air inside the second cover The roadside deposits (ash) swept forward and upward by the rotating brush 8 are transported to the vacuum storage tank 1 through the suction pipe 9 along with the airflow vacuumed through the air passage.
be loaded into the If the cross-sectional area of the air passage is set so that the air flow velocity within the suction pipe 9 is greater than the sedimentation velocity of the roadside sediment components, no deposits of volcanic ash or the like will be formed at the suction port of the suction pipe.

〔Example〕

1 to 5 show an embodiment of the present invention, in which a vacuum storage tank 1 includes a water tank 10 for moistening suction ash in a suction pipe 9 with jet water, a duct 11 provided at the top of the vacuum storage tank, and a vacuum storage tank 1. The vacuum storage tank is integrally mounted with a filter net 12 and the like stretched over the communication port between the rear end of the duct and the vacuum storage tank 1, and is pivoted to the rear end of the vehicle body 14 of the automobile 13 with a pin 15 so as to be tiltable rearward. A discharge door 16 is provided at the rear end of the vehicle for discharging roadside deposits that have settled there.
A blower 17 maintains a vacuum inside the storage tank 1. The blower 17 is mounted on the vehicle body 14, and the front part of the duct 11 normally rests on the blower cover 18, so that the suction port 17a of the blower 17 is placed in the air. Connects to the duct.

The conveyor 2 includes a guide drum 20 and a drive drum 21 that are rotatably attached to the top and bottom of a conveyor case 19.
A rubber conveyor belt 22 shown in FIGS. 4 and 5 is applied to the conveyor belt 22.
is a transverse isolation 22b on the outer periphery of the endless belt 22a.
and a corrugated side wall 22c that connects the side ends of the elastic bucket.
A hydraulic motor 23 for driving the conveyor 1 in the direction of the arrow in FIG. 1 is attached to the side wall of the conveyor case 19. The upper part of the conveyor case 19 is tiltably pivoted by a pin 26 to a bracket 25 installed on the vehicle body 14 via a bracket 24 installed on the lower surface of the conveyor case 19.
The upper end of the conveyor case protrudes into the vacuum storage tank 1, and a discharge port 27 is provided at the upper end and rear surface. Reference numeral 28 denotes a loading port provided on the rear surface of the lower end of the conveyor case, and the lower end of the loading port 28 shown in the figure has a slope that allows the rear end to slide approximately on the roadside deposits due to the elasticity of a weak spring 29 and its own weight. A guide plate 30 is mounted on a pivot 31 so as to be vertically swingable. The tip portion 30a of the illustrated inclined guide plate 30 is a rubber plate.

Both sides of the lower part of the conveyor case 19 are attached to the tops of both sides of the first cover 3 so that the inclination can be adjusted by appropriate mounting brackets 32, and the first cover 3 is attached to the lower end of the conveyor case in cooperation with the lower end of the conveyor case that closes the front end of the first cover 3. forms an open box-like body. 1st cover 3
The skirts 33 made of rubber plates attached to the lower part of the wall plates on both sides are connected to the vehicle body 14 with the wheels (casters) 4 attached on both sides of the rear end, respectively, and the top sides of the front end so as to be in contact with the road surface. It is supported by a removable towing rod 34 (FIG. 2). 35
is a single-acting air cylinder attached to the vehicle body 14 so as to lift and rotate the first vacuum cleaner around a pin 26 when not cleaning, and the first cover 3 is supported at the lower end of the piston rod via a chain 36. . Therefore, when the air cylinder 35 contracts, the conveyor case 19 rotates to the position shown by the chain line in FIG.

The rotating brush 5 is rotatably attached between both parallel vertical side wall plates of the first cover 3, and its cylindrical drum 5a is driven in the direction of the arrow by a hydraulic motor 37 attached to the first cover. Brush bristles (piano wire) 5b planted on the outer periphery of the drum
sweeps roadside deposits into the conveyor side loading port 28. The brush bristles 5b are the rotating brush 8 on the second vacuum cleaner side.
It is preferable that the bending rigidity, that is, the sweeping force, be greater than that of the brush bristles.

Reference numeral 38 denotes a skirt made of a rubber plate attached to the lower part of the rear wall plate 3a of the first cover so as to be adjustable up and down, and a slight gap c can be formed between the skirt 38 and the road surface. The skirt lifting/lowering mechanism is a simple one, such as providing a vertical long hole in the base plate attached to the upper part of the skirt, and screwing a bolt passing through the long hole into the rear wall plate 3a, thereby reducing the gap c to zero. It is possible to do so. The skirt 33 is also preferably attached to the first cover side wall plate so as to be adjustable up and down, and a rubber gasket 39 or the like is preferably attached to the gap between the first cover 3 and the conveyor case 19 as appropriate.

A sealing device 40 is attached to the front wall plate 1a of the vacuum storage tank 1 so that the conveyor case 19 can be inserted and removed when the vacuum storage tank is rotated about the pin 15. The sealing device 40 may have a simple structure in which a rubber gasket 41 guided by a suitable guide mechanism is pressed against the conveyor case 19 by a spring 42.

The second vacuum cleaner includes a second cover 6 in the shape of a rectangular parallelepiped with its lower end open, and a skirt 43 made of a rubber plate attached to the lower part of both side wall plates and the rear wall plate so as to be adjustable up and down.
The wheels (casters) 7 on both sides of the rear end and both sides of the top of the front end are mounted on the vehicle body 1 so that the wheels 44 are in almost sliding contact with the road surface.
4 and a vertical traction mechanism 45 (FIG. 2). The traction mechanism 45 includes a guide means on the vehicle body side that guides the front end of the second cover so that it can move up and down, and a ground pressure reducing tension spring that biases the front end of the second cover in the pulling direction.

A rotary brush 8 mounted rearward within the second cover 6 over substantially its entire width in a conventional manner is driven in the direction of the arrow by a hydraulic motor 46 mounted on the cover, and the rotary brush 8 and the front wall of the second cover The suction port 47 of the flexible suction pipe 9 is connected to the second cover top plate between the second cover top plate and the plate 6b. The upper end of the flexible suction pipe 9 is supported by a support member 48 installed on the vehicle body 14, and when the vacuum storage tank 1 etc. is resting on the vehicle body as shown in FIG. The upper end of the suction pipe 9 is separably connected to the discharge port 49 provided. The outlet 49 is inclined or curved toward the center of the vacuum storage tank as shown in FIG.
a, and the air, ash, etc. sucked out from the discharge port 49 are dispersed by the vacuum storage tank ceiling plate 1b to the side opposite to the conveyor side discharge port 27, and the ash, etc. is sedimented and separated almost evenly when passing through the vacuum storage tank.

Note that, like the first vacuum cleaner, a hydraulic cylinder 50 for lifting the second cover 6 from the road surface when not cleaning is attached to the vehicle body. Reference numeral 51 denotes a cutter brush that can be extended to the side of the vehicle 13, and is similar to the conventional type for sweeping roadside deposits into the first cover 3, but is not used when the thickness of volcanic ash deposits is large.

Also, as shown in Figs. 4 and 5, the conveyor 2
However, an elastic bucket belt with extendable corrugated side walls 22c on both sides is attached to the conveyor belt 22, which is connected to the endless belt 22a so that it can rotate, with a gap of 4 mm or more through which volcanic ash, etc. can pass. In the case of an inclined conveyor consisting of a conveyor case 19 surrounding a conveyor belt, the dust generated in the first cover 3 due to the rotation of the rotating brush 5 is sucked into the vacuum storage tank 1 through the gap, so that volcanic ash is Even if it is dry, there is no fear that dust will spread before and after the first cover. Of course, the cross-sectional area of the air passage formed at the conveyor case loading port by this gap is significantly smaller than the cross-sectional area of the air passage in the suction pipe 9.

〔Effect of the invention〕

According to the present invention, the first vacuum cleaner cleans the volcanic ash etc. in advance of the second vacuum cleaner so that the thickness of the volcanic ash etc. accumulated on the road becomes a thickness that can be cleaned by the second vacuum cleaner. Even if volcanic ash is deposited on the road with a thickness of about 70 to 160 mm, it can be cleaned in one time regardless of the humidity or dryness of the volcanic ash, and there is no problem with hygiene due to the generation of dust during cleaning. The effect is that there is no risk of causing problems.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention;
Figure 2 is a side view showing its overall configuration, Figure 3 is a cross-sectional view of Figure 2, Figures 4 and 5 are a front view and longitudinal side view of the conveyor belt, and Figure 6 is a
FIG. 3 is a longitudinal sectional side view when the vacuum cleaner is used alone. 11...Duct, 12...Filter screen, 13...Car, 17...Blower, 17a...Blower suction port.

Claims (1)

[Claims] 1. A lower end of a conveyor case of a conveyor 2 having an upper end discharge port opened in an on-vehicle vacuum chamber 1 is used as a front wall,
A first cover 3 forming a box-like body with an open bottom end
The first cover is provided with a means for bringing the lower edges of both side walls into substantially sliding contact with the road surface, and a rotating brush 5 for sweeping roadside deposits such as volcanic ash into a loading port provided at the rear surface of the lower end of the conveyor case. a first vacuum cleaner installed inside the vacuum cleaner, and a second vacuum cleaner forming a box-like body with an open bottom end.
The cover 6 is provided with means for bringing the lower edges of its side walls and rear wall into approximately sliding contact with the road surface, and a rotary brush 8 for sweeping away roadside deposits forward and upward is attached to the rear inside the second cover. 2 Cover front wall and rotating brush 8
and a second vacuum cleaner formed by connecting a roadside deposit suction pipe 9 to the on-vehicle vacuum storage tank 1 to a second cover part between the first cover 3 and the second cover 6. Both covers are attached to the vehicle equipped with the vacuum storage tank 1 so that the gap a between the lower end of the front wall of the second cover 6 and the road surface is smaller than the gap b between the lower end of the conveyor case and the road surface. A road cleaning device characterized by: 2. In order to prevent adhering lumps of volcanic ash, etc. from forming at the suction port of the suction pipe 9, the gap a between the lower end of the front wall of the second cover and the road surface is changed from the gap a between the lower end of the rear wall of the first cover and the road surface. The road cleaning device according to claim 1, wherein the road surface cleaning device is larger than c.