JP4310911B2 - Cleaning machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cleaner that sweeps up dust on a road surface with a sweeping brush and transports it with an elevator.
[0002]
[Prior art]
Conventionally, as this type of cleaner, there is known a road surface cleaning vehicle including a sweeping brush that sweeps up dust on a road surface and an elevator that carries the cleaned dust up to a hopper. The sweeping brush and the elevator are rotated forward and backward in the same direction by separate hydraulic motors connected in series to the hydraulic pump, and the sweeping brush is moved up and down by the manual operation lever to the ground position and the retracted position. At the time of road surface cleaning, the sweeping brush is lowered to the grounding position, and the sweeping brush and the elevator are rotated in the positive direction. In addition, when the elevator bites a deformed object such as a bag or string, the sweeping brush and the elevator are rotated in the reverse direction so that the deformed object can be removed.
[0003]
[Problems to be solved by the invention]
However, according to the conventional cleaner, the elevator can be rotated forward and backward regardless of the position of the sweeping brush. Therefore, if the elevator is rotated reversely to remove irregularities during the cleaning operation, the sweeping brush is also reversed simultaneously. There was a problem that the dust was scattered and the dust was scattered to the rear of the vehicle body and soiled the cleaned road surface. In addition, since the rotational directions of the sweeping brush and the elevator are suddenly switched, there is a problem that an impact is generated in each hydraulic motor.
[0004]
Therefore, an object of the present invention is to reversely rotate the elevator as necessary only when the sweeping brush is retracted, and to remove irregularities from the elevator without soiling the road surface, and to impact the sweeping brush and the drive mechanism of the elevator. It is to provide a cleaning machine that can be protected from.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a cleaner according to the invention of claim 1 stores a sweeping brush that sweeps up dust on a road surface, an elevator that carries the sweeped-up dust, and a sweeping brush in a grounded position. A lifting and lowering device that moves up and down to a position, a drive mechanism that rotates the sweeping brush and the elevator, and a control device that controls the drive mechanism, and the control device rotates the sweeping brush and the elevator forward at the grounding position of the sweeping brush. The switching means for reversely rotating the elevator at any time in the retracted position is provided.
[0006]
According to a second aspect of the present invention, in the cleaning machine, the switching means detects a grounding position and a storage position of the sweeping brush, a forward rotation circuit that normally rotates the sweeping brush and the elevator at the grounding position, and a storage position. And a reverse circuit that reversely rotates the elevator and a switch that opens and closes the reverse circuit.
[0007]
According to a third aspect of the present invention, there is provided a cleaner according to the invention, wherein the elevating device includes a rotatable manual operation lever, a link mechanism that moves the sweeping brush up and down in conjunction with the manual operation lever, and a fulcrum of the manual operation lever. And a cam for operating the device.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which the present invention is embodied in a road sweeper will be described with reference to the drawings. As shown in FIG. 1, in this road cleaning vehicle, a housing 2 is provided at a lower portion of a vehicle body 1, and a sweeping brush 3 that sweeps up dust on the road surface and dust that has been swept up are disposed inside the housing 2. An elevator 4 that is carried to a hopper (not shown) is provided in parallel. The sweeping brush 3 is supported on the rear side of the elevator 4 (rear of the vehicle body 1) by an arm 5 so as to be swingable up and down around a support shaft 6, and is rotated forward and backward by a hydraulic motor 7. The elevator 4 includes two jumping plates 8 that are attached to a rotating shaft 9, and the rotating shaft 9 is rotated forward and backward by a hydraulic motor 10. Note that an endless belt with a scraper can also be used as the elevator 4.
[0009]
In the vicinity of the driver's seat 12, a manual operation lever 13 that raises and lowers the sweeping brush 3 to the ground position and the storage position, a limit switch 16 as a detector that detects the grounding position and the storage position of the sweeping brush 3, A cam plate 14 that operates the limit switch 16 at a fulcrum portion of the manual operation lever 13 and a latch plate 15 that latches the manual operation lever 13 at two operation positions are provided. The manual operation lever 13 and the cam plate 14 are connected by a pin 17 and supported by a common shaft 18 so as to be integrally rotatable. The cam plate 14 is connected to the arm 5 via a rod 19, a lever 20, and a rod 21, and these members constitute a link mechanism 22 that moves the sweeping brush 3 up and down in conjunction with the manual operation lever 13. The latch plate 15 is formed with a pair of upper and lower notches 23 and 24 into which the manual operation lever 13 is fitted.
[0010]
When the manual operation lever 13 is fitted into the upper cutout 23, the sweeping brush 3 is held at the retracted position away from the road surface, the limit switch 16 is switched to one side by the cam plate 14, and the limit switch 16 The storage position of the sweeping brush 3 is detected. Further, when the manual operation lever 13 is fitted into the lower notch 24, the sweeping brush 3 is held at the ground contact position in contact with the road surface, the limit switch 16 is switched to the opposite side by the cam plate 14, and the limit switch 16 The ground contact position of the sweeping brush 3 is detected. When the manual operation lever 13 is removed from the retaining plate 15, the sweeping brush 3 swings following the unevenness of the road surface at the ground contact position.
[0011]
FIG. 2 shows the hydraulic drive mechanism 26 of the sweeping brush 3 and the elevator 4. The drive mechanism 26 is configured by connecting a hydraulic motor 7 that drives the sweeping brush 3 and a hydraulic motor 10 that drives the elevator 4 in series to a hydraulic pump 28 via a switching valve 27. When one solenoid 27a of the switching valve 27 is excited, the sweeping brush 3 and the elevator 4 are rotated forward in the same direction, respectively, and when the other solenoid 27b is excited, the sweeping brush 3 and the elevator 4 are excited. Are rotated backward in the same direction.
[0012]
FIG. 3 shows an electric control device 30 that controls the switching valve 27. The control device 30 is provided with a forward rotation circuit 31 for driving the solenoid 27a, a reverse rotation circuit 32 for driving the solenoid 27b, and an automatic return type push button switch 33 for opening and closing the reverse rotation circuit 32 at any time. . The forward rotation circuit 31 and the reverse rotation circuit 32 are connected to the power source 34 via the limit switch 16, and the push button switch 33 is provided on an operation panel (not shown) near the driver's seat 12. Note that the forward rotation circuit 31 and the reverse rotation circuit 32 may be connected to the power supply 34 via separate switches.
[0013]
When the limit switch 16 detects the grounding position of the sweeping brush 3, the forward rotation circuit 31 is energized, the solenoid 27a is excited, and the sweeping brush 3 and the elevator 4 are rotated forward. When the limit switch 16 detects the retracted position of the sweeping brush 3 and the push button switch 33 is pressed, the reverse rotation circuit 32 is energized, the solenoid 27b is excited, and the sweeping brush 3 and the elevator 4 are reversed. It is rotated. Therefore, the limit switch 16, the forward rotation circuit 31, the reverse rotation circuit 32, and the push button switch 33 constitute switching means for switching the rotation directions of the sweeping brush 3 and the elevator 4.
[0014]
According to the road sweeper configured as described above, since the reverse rotation of the sweeping brush 3 and the elevator 4 is prohibited at the ground contact position of the sweeping brush 3, when the elevator 4 bites a deformed object. After the sweeping brush 3 is disposed at the retracted position, the pushbutton switch 33 is operated to reversely rotate the sweeping brush 3 and the elevator 4. If it carries out like this, a deformed object can be removed from the elevator 4 without polluting the cleaned road surface. Further, since the sweeping brush 3 and the elevator 4 are reversely rotated in a temporarily stopped state, there is no possibility that the hydraulic motors 7 and 10 are shocked, and the life of the hydraulic drive mechanism 26 can be improved.
[0015]
The present invention is not limited to the above-described embodiment. For example, the sweeping brush and the elevator are each a single drive circuit so that only the elevator rotates reversely when stored, or the sweeping brush and the elevator are electrically driven. In the range which does not deviate from the gist of the present invention, such as driving, controlling the drive mechanism of the sweeping brush and the elevator with a hydraulic control device, and applying the present invention to various industrial cleaners other than the road sweeper. It is also possible to carry out by appropriately changing the shape and configuration of each part.
[0016]
【The invention's effect】
As described above in detail, according to the cleaning machine of the present invention, the elevator is reversely rotated as necessary only when the sweeping brush is retracted. An excellent effect of protecting the drive mechanism of the brush and the elevator from an impact is achieved.
[Brief description of the drawings]
FIG. 1 is a side view of an essential part of a road cleaning vehicle showing an embodiment of the present invention.
2 is a circuit diagram showing a hydraulic drive mechanism of a sweeping brush and an elevator in the road sweeper of FIG. 1. FIG.
FIG. 3 is a circuit diagram showing an electric control device of the hydraulic drive mechanism of FIG. 2;
[Explanation of symbols]
3 .... Sweeping brush, 4 .... Elevator, 7, 10 .... Hydraulic motor, 13 .... Manual operation lever, 14 .... Cam plate, 16 .... Limit switch, 22 .... Link mechanism, 26 .... Hydraulic drive Mechanism, 30 ... Electric control device, 31 ... Forward rotation circuit, 32 ... Reverse rotation circuit, 33 ... Push button switch.

Claims (3)

A sweeping brush that sweeps up dust on the road surface, an elevator that carries the swept up dust, an elevating device that raises and lowers the sweeping brush to a ground position and a storage position, and a drive mechanism that rotates the sweeping brush and the elevator And a control device for controlling the drive mechanism, and the control device is provided with switching means for normally rotating the sweeping brush and the elevator at the ground contact position of the sweeping brush and reversely rotating the elevator at any time in the retracted position. . The switching means detects a grounding position and a retracted position of the sweeping brush, a forward rotation circuit that normally rotates the sweeping brush and the elevator at the grounding position, and a reverse rotation circuit that reversely rotates the elevator at the retracted position; The cleaning machine according to claim 1, further comprising a switch for opening and closing the reverse rotation circuit. 3. The lifting device includes a rotatable manual operation lever, a link mechanism for moving up and down the sweeping brush in conjunction with the manual operation lever, and a cam for operating the detector at a fulcrum portion of the manual operation lever. The cleaning machine described.

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