JPH0739938Y2 - Road surface cleaning device dust discharge mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a mechanism for discharging dust in a hopper of a road surface cleaning device.

[Conventional technology]

The road surface cleaning device is provided with a rotating brush in the hopper, and the rotating brush is projected downward from the opening of the lower surface of the hopper to collect dust on the road surface into the hopper with the rotating brush to clean the road surface. The cleaning device is mounted on a vehicle body so as to be able to move up and down to form a road surface cleaning vehicle.

For example, a road surface cleaning machine can be moved up and down by connecting a hopper to the tip of an arm that is swingably supported on a vehicle body and swinging the arm up and down.

In such a road surface cleaning vehicle, the dust collected in the road surface cleaning device may be loaded on the bed of the dump truck so that the dust in the hopper can be discharged.

For example, as shown in FIG. 8, a rotating brush c is provided in the rear part b of the hopper a, and a front part d of the hopper a is vertically rotatable by a cylinder e, and an arm f mounted on the rear part b of the hopper a is attached. The front part d of the hopper a is rocked upward by the cylinder e and rocked upward to discharge the dust to the bed g of the dump truck.

[Problems to be solved by the device]

With such a dust discharging mechanism, when the front part d of the hopper a is rocked, it may interfere with the cargo bed g, and the distance between the bottom surface of the hopper a and the top surface of the cargo bed g, that is, the damping clearance H must be increased. Since the dust is discharged from the high position to the loading platform g, not only the dust is spilled from the loading platform g, but also the lifting stroke of the road surface cleaning device needs to be increased.

Then, this invention aims at providing the road surface cleaning apparatus which can solve the above-mentioned subject.

[Means and Actions for Solving the Problems]

A plurality of bottom plates for opening and closing the front opening of the hopper are provided so as to be vertically swingable, and a mechanism for vertically swinging the bottom plates is arranged between the inner and outer side walls to swing the bottom plate downward. By moving, the dust in the hopper can be discharged, and the vertical swinging mechanism can be hidden from the outside.

〔Example〕

(Overall Structure of Road Cleaning Vehicle) As shown in FIGS. 5 and 6, a vehicle body 1 is formed by connecting a rear vehicle body 2 and a front vehicle body 3 by a vertical pin 4 so as to be swingable left and right. A driver's cab 5 and rear wheels 6 are provided, and a front vehicle body 3 is provided with front wheels 7.

In the front vehicle body 3, the upper plate 8 and the lower plate 9 are connected by a connecting vertical plate 10, and a pair of left and right vertical frames 11, 11 are fixed to the left and right edges of the upper plate 8 and the lower plate 9, respectively. 8 and upper and lower brackets 12 and 13 provided at the rear end of the lower plate 9 are connected to the bracket 14 of the rear vehicle body 2 by vertical pins 4, and the vertical frame 11 is formed by an inner plate 15, an outer plate 16 and a connecting plate 17. The steering cylinder 20 is pivotally attached to the bracket 18 provided on the inner side plate 15 and the protruding piece 19 of the bracket 14, and the steering cylinder 20 is extended and contracted to form the rear vehicle body 2. The front vehicle body 3 swings left and right around the vertical pin 4.

A road surface cleaning device is attached to the front body 3 via a lift mechanism 21.
22 is mounted so that it can be raised and lowered.

(Details of Lift Mechanism 21) As shown in FIGS. 5 and 6, a pair of left and right lift arms 30 and 30 can be vertically swung by pins 31 and 31 in the vertical middle of the pair of left and right vertical frames 11 and 11. And a bracket 3 mounted on a horizontal punch 32 that is horizontally supported between the upper parts of the pair of left and right vertical frames 11 and 11.
3, a pair of left and right links 35, 35 are vertically swingably supported via pins 34, and the link 35 and the lift arm 30 are pivotally attached to the road surface cleaning device 22 by pins 36, 37, respectively, and are parallel four-bar links. A mechanism 38 is configured, and an elevating cylinder 39 is pivotally attached to each of the pair of vertical frames 14, 14 and the pair of lift arms 30, 30, and the road cleaning device 22 is vertically moved by expanding and contracting the elevating cylinder 39. It is designed to move in parallel with.

A connecting member 40 is horizontally connected between the pair of left and right lift arms 30 and a damper mechanism 41 is provided on both left and right sides of the connecting member 40. The damper mechanism 41 has a cylindrical shape as shown in FIG.
A pestle body 43 is slidably fitted in the hood 42, and the pestle body 43 is urged downward by a spring 44 so as to project from the cylindrical body 42. The pestle body 43 is formed by the pair of left and right vertical frames 14, 14 described above. Facing the receiving pestle 46 provided on the cross member 45 laid horizontally between the front portions of the
Is screwed into the cross member 45 and fixed with a lock nut 47, and the lock nut 47 is loosened to tighten the receiving pestle 46, and the slack can be adjusted to move up and down.

(Function of Damper Mechanism 41) When the lift arm 30 is moved down to bring the road surface cleaning device 22 closer to the road surface, the pestle 43 of the damper mechanism 41 hits the receiving pestle 46, and a part of the weight of the road surface cleaning device 22 becomes a spring. Even if the road surface cleaning device 22 is in a semi-floating state by acting on the front vehicle body 3 via 44, a part of the weight of the road surface cleaning device 22 can be supported by the front vehicle body 3 to improve the load balance and act on the vehicle body 1. As a result, the forward turning moment is reduced, and the vehicle body 1 can be downsized.

(Details of Road Surface Cleaning Device) As shown in FIGS. 1 to 3, the road surface cleaning device 22 includes a hopper 50, and the hopper 50 has a rear wall 51, an upper wall 52, and a front wall 53.
And the left and right side walls 54, 54 make a casing opened at the bottom,
The side wall 54 has a hollow shape with an inner side wall 54a and an outer side wall 54b, an intermediate lateral wall 55 is horizontally extended along the front-rear direction between the left and right inner side walls 54a, 54a, and a holding plate 56 is horizontally extended on the lower front and rear intermediate portions. A rear opening 57 and a front opening 58, and a part of the rotary brush 59 projects downward from the rear opening 57, and the first and second bottom plates 60, 61 rock up and down in the front opening 58. It is movably supported and can be opened and closed. Rear casters 62 are attached to the left and right sides of the rear wall 51, and front casters 63 are attached to the left and right sides of the front wall 53.

The base portion of the first bottom plate 60 is, as shown in FIG. 2, left and right rotating shafts 6 supported by shaft supporting portions 64 provided on the left and right inner side walls 54a, 54a.
It is fixed horizontally between 5,65, and the first lever 66 is attached to its rotating shaft 65.
The base portion of the second bottom plate 61 is laterally fixed between the left and right rotary shafts 68, 68 supported by shaft support portions 67 provided on the left and right inner side walls 54a, 54a as shown in FIG. And its rotation axis 6
The second lever 69 is firmly attached to 8.

The first and second levers 66, 69 are disposed between the inner wall 54a and the outer wall 54b and connected by a connecting punch 70, and the cylinder 72 is connected to the first lever 66 and the bracket 71 fixed to the front wall 53. When the cylinder 72 is extended, the first lever 66 swings backward and the first bottom plate 60 swings downward together with the rotary shaft 65, and the swing of the first lever 66 causes the connecting punch 70 to pass through. When the second lever 69 swings backward, the second bottom plate 61 swings downward together with the rotating shaft 68 to open the front opening 58, and the cylinder 72 is contracted. 2 bottom plate 60,61
Oscillates upward to close the front opening portion 58, and these constitute a mechanism for oscillating the bottom plate up and down.

The connecting pestle 70 is screwed into the screw hole 74a of the first pestle 74 with the threaded portion 75a of the second pestle 75 and fixed with the lock nut 76, and the lock nut 76 is loosened to rotate relative to the connecting pestle 70. The length is adjustable, and the first lever 66 and the second lever 69 can be connected so that the second bottom plate 61 is in the closed position after the cylinder 72 is contracted to bring the first bottom plate 60 into the closed position.

(Dust Discharging Operation) As shown in FIG. 4, the lift arm 30 is swung upward to raise the road surface cleaning device 22 and position it on the dump truck bed 77, and the cylinder 72 is extended to move the first.・ Second bottom plate 6
Swing 0, 61 downward to open front opening 58 and hopper
Dispose of the waste in 50 and load it on the loading platform 77.

At this time, since the first and second bottom plates 60 and 61 swing downward, the damping clearance H can be reduced without interfering with the loading platform 77.

[Effect of device]

Swing the bottom plates downward to allow the front opening 58 of the hopper 50 to
Since the dust inside the hopper 50 can be discharged by opening the dump truck, the dumping clearance when loading dust onto the loading platform of the dump truck can be reduced, and the dust does not fall off from the loading platform.

Since the mechanism for vertically swinging the plurality of bottom plates is disposed between the inner side wall 54a and the outer side wall 54b of the side wall 54, they are not exposed to the outside and have a good appearance, and are not exposed to wind and rain. The durability is improved.

[Brief description of drawings]

1 is a partially cutaway front view of a road surface cleaning device, FIG. 2 and FIG.
Fig. 1 is a sectional view taken along the line II-II and III-III in Fig. 1, Fig. 4 is a diagram for explaining the dust discharging operation, Fig. 5 and Fig. 6 are front views, plan views and Fig. 7 of the road cleaning vehicle. FIG. 8 is a sectional view of the damper mechanism, and FIG. 50 is a hopper, 51 is a rear wall, 52 is an upper wall, 53 is a front wall, 53 is a side wall, 54 is a side wall, 54a is an inner side wall, 54b is an outer side wall, 57 is a rear opening, 58 is a front opening, and 59 is a rotating brush. , 60, 61 are the first and second bottom plates.

Claims (1)

[Scope of utility model registration request] 1. A rotating brush 59 is provided in a casing-shaped hopper 50 having a rear opening 57, a front opening 58, and a rear opening 57, and a front wall 53, a front wall 53, and left and right side walls 54. In the road surface cleaning device provided with a part projecting downward from the rear opening 57, the left and right side walls 54 are formed in a hollow shape by an inner side wall 54a and an outer side wall 54b, and a front part is provided between the left and right inner side walls 54a, 54a. A plurality of bottom plates for opening and closing the openings 58 are arranged so as to be vertically swingable, and a mechanism for vertically swinging the plurality of bottom plates is arranged between the inner side wall 54a and the outer side wall 54b. Dust discharge mechanism for road cleaning equipment.