JPS5937365B2 - powered vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power-driven vacuum cleaner, and particularly to a power-driven vacuum cleaner whose dust box can be dumped.

Generally, power-powered vacuum cleaners have a main brush for sweeping dust inside the cleaning chamber formed almost in the center of the main body, and can dump the dust box into a box storage space formed at the front of the main body. The dust box is equipped with a sweep port formed at the lower rear end of the dust box and opened in the vicinity of the main brush.

Therefore, while driving other than during cleaning work, the dust in the dust box may fall out of the sweep port due to vibration and stain the road surface, and when the dust box is damped to release the collected dust, the main brush Dust is emitted over a wide area from the vicinity to the front wheel position, and sometimes the front wheels are buried in dust and cannot move, and since the driver's seat is near the main brush, dust is generated near the driver's seat. This was not only unsanitary as it caused a lot of water to rise, but also caused problems in terms of maintenance of the equipment.

The present invention aims to provide a power-driven vacuum cleaner that eliminates the above-mentioned conventional problems by attaching an openable/closable shutter to the sweep opening of the dust box.

Hereinafter, illustrated embodiments embodying the present invention will be described in detail.

As shown in Figs. 1 and 2, this vacuum cleaner is equipped with a main body part 1 extending in the longitudinal direction of the vehicle and spaced apart in the direction of lateral force. An engine compartment 2 that houses an internal combustion engine that is a power source is installed, and a driver's seat 3 is installed in the upper part of the engine compartment 2, and a control bundle 4, a control lever 5, etc. are installed in front of the driver's seat 3. .

A cleaning chamber 6 which is open at the front and bottom and extends in a direction across the vehicle is formed below the center of the main vehicle body part 1, and inside this cleaning chamber 6 is a dust sweeper rotatably driven by a hydraulic motor M. A main brush 7 for cleaning is installed inside the vehicle and extends in the vehicle width direction, and this main brush 7 is supported so as to be movable up and down by a lift mechanism (not shown).

Further, a side brush 9 supported by a brush arm 8 is disposed in front of one side of the main vehicle body portion 1, and this side brush 9 is rotationally driven via a mechanical or hydraulic power transmission mechanism. It is raised and lowered by appropriate means.

A dust box 10 for collecting dust is arranged in a box storage space formed in the front part of the main vehicle body part 1, and this dust box 10 includes a dust pan 11 for storing dust swept by the main brush γ, and a filter. 12
It consists of an upper housing 13 equipped with
When the dust box 10 is held in the correct position, the sweep port 14 formed at the lower rear end of the dust pan 11 faces the main brush 8, and the rear end of the upper housing 13 is connected to the duct 16 of the blower 15. and are separably joined.

The dust box 10 is supported by a lift arm 17 and a guide rail 22 at the front and rear so as to be dampable.

That is, a pair of left and right lift arms 17 whose base ends are pivotally connected by a pin 18 protruding from the upper center of the main vehicle body portion 1 extend toward the lower front, and their front ends touch the front side surface of the dust box 10. The front side of the dust box 10 is supported by being pivotally connected to a pin 19 protruding from the front side.

The lift arm 17 is connected below the lift arm 17 to a piston rod 21 of a dump cylinder 20 whose base end is pivotally connected to the main vehicle body part 1, and is rotated up and down around the pin 18 by the dump cylinder 20. be done.

On the other hand, the pair of left and right guide rails 22 are connected to the dust box 1.
It extends and is fixed to the main vehicle body part 1 at the part facing the left and right side walls of the idle rail 22 so as to form an upward slope toward the front. A roller 23 protruding from the rear side surface of the dust box 10 is removably fitted, thereby supporting the rear side of the dust box 10.

Therefore, when the piston rod 21 of the dump cylinder 20 is extended, the dust box 10 falls forward while being guided by the guide rail 22 so that the sweep opening 14 faces downward as the lift arm 17 rotates upward. It performs a damping effect.

Therefore, the sweep opening 14 of the dust box 10 configured and supported as described above has a shutter 24 that can be opened and closed.
is provided.

That is, the upper end of the shutter 24 is rotatably supported by a pin 25 on the upper edge of the sweep port 14, and when the shutter 24 is rotated downward, its lower edge is placed on the bottom surface of the sweep port 14 in the vehicle width direction. The sweep opening 14 is closed by coming into contact with the upper end edge of a medium-high protrusion 26 which is extended and fixed to guide the sweep and prevent spills from falling out.

Further, the shutter cylinder 27 for rotating the shutter 24 has its base end pivotally attached to the upper part of the rear wall of the dust box 10 by a pin 28, and a piston rod 29 extending obliquely downward is connected to the base end of the shutter 24. It is connected to an interlocking arm 30 via a pin 31.

Note that 32 is a lip made of rubber or synthetic resin for guiding dust to the sweep port 14 when the main brush 7 performs a cleaning operation.

In this embodiment, the shutter 24 of the sweep port 14 is hydraulically controlled to close the sweep port 14 during the cleaning action when the main brush 7 rotates, and sometimes during the damping action of the dust box 10 when the dust is discharged. The sweep port 14 is configured to be opened and closed during other normal driving, and this will be explained below with reference to the hydraulic circuit diagram in FIG. 5.

In the figure, numeral 33 indicates a 6-point, 3-position type control valve that is switched and controlled by the operating lever 5, and one port on the inflow side of the control valve 33 is connected to a main pipe line 34 leading to the hydraulic pump P. Another port is connected to a branch line 36 that branches from the main line 34 and includes a reverse valve 35, and yet another port is connected to a return line 37 leading to the oil tank T, and the main line The line 34 and the return line 37 are connected by a line 40 that includes a relief valve 38 and a throttle valve 39 in series.

Further, one port on the outflow side of the control valve 33 is connected to the first pressure pipe 41 leading to the head side of the shutter cylinder 27, and the other port is connected to the shutter cylinder 27 via the hydraulic motor M of the main brush 7.
A second pressure line 43 including a check valve 42 leading to the rond side of the
The other port is connected to a third pressure line 44 leading to the head side of the dump cylinder 20, and the first pressure line 41 is connected to the return line 37 by an on-off valve 46. It is connected via a conduit 47 including.

The on-off valve 46 is configured to be switched by both a pressure switch 48 provided in the second pressure pipe 43 and a solenoid 49.
It is controlled by a limit switch 50 that is turned on when the damping action is performed.

Further, the pipe line 51 connects a position near the shutter cylinder 27 in the first pressure pipe line 41 and an intermediate position between the relief valve 38 and the throttle valve 39 in the pipe line 40, and connects the rod side of the shutter cylinder 27. The oil is returned to the oil tank T via the throttle valve 39.

This embodiment is constructed as described above, and its operation will be explained below.

During normal driving without cleaning, the control valve 33
is switched to the non-cleaning position (intermediate position) as shown in FIG.

Therefore, the main pipe line 34 of the hydraulic pump P is connected to the first pressure pipe line 41 leading to the head side of the shutter cylinder 27,
In addition, the rod side of the shutter cylinder 27 communicates with the oil tank T via the conduit 51, the throttle valve 39, and the return conduit 37, and in this state, the on-off valve 46 is held in the closed position, so that the hydraulic pump The hydraulic oil from P is forced to be sent to the head side of the shutter cylinder 27.

Therefore, the piston rod 29 of the shutter cylinder 27 protrudes to rotate the shutter 24 downward and close the sweep opening 14.

Also, at this time, the second pressure line 43 of the hydraulic motor M for the main brush and the third pressure line 4 of the dump cylinder 20 are
4 are both connected to the return line 37.

That is, in the normal running state, as shown in FIG. 2, the sweep opening 14 of the dust box 10 is closed by the shutter 24, the main brush 7 is maintained in a stopped state, and the dust box 10 is also maintained in its normal position.

Next, when the control valve 33 is switched to the cleaning position (left side position in the figure) using the operating lever 5 in order to clean the road surface, the hydraulic oil from the hydraulic pump P is transferred from the branch pipe 36 to the second pressure pipe 43. Then, it is force-fed to a hydraulic motor M, which rotates the main brush 7 and is force-fed to the rod side of the shutter cylinder 27.

At this time, as the oil pressure in the second pressure pipe 43 increases, the pressure switch 48 turns ON, and the solenoid 49 activates the on-off valve 4.
6 is switched to the open position, oil on the head side of the shutter cylinder 27 flows from the first pressure pipe 41 to the on-off valve 46.
Since the oil returns to the oil tank T via the conduit 47 including the conduit 47 and the return conduit 37, the piston rod 29 of the shutter cylinder 27 contracts to rotate the shutter 24 upward and open the sweep port 14.

Note that at this time, the dump cylinder 20 is in communication with the oil tank T, and the dust box 10 remains in the correct position, so the rotation of the main brush 7 sweeps the dust on the road surface from the sweep opening 14 into the dust box 10. (See Figure 3).

Note that after the shutter 24 is opened, the hydraulic oil pumped from the hydraulic pump P flows from the pipe 51 to the oil tank T via the throttle valve 39 and the return pipe 37.
The drive motor M of the main brush 7 rotates continuously,
The rotation speed of the main brush 7 can be adjusted as appropriate by configuring the throttle amount of the throttle valve 39 to be variable.

After the cleaning operation is completed, the control valve 33 is switched to the non-cleaning position (the intermediate position shown in the figure) again, and the shutter 24 closes the sweep opening 14 and stops the rotation of the main brush 7, as described above.

When discarding the dust collected in the dust box 10, after driving to the designated location, switch the control valve 33 to the dump position (right position in the figure), and the hydraulic oil from the hydraulic pump P is diverted. Since the dust is fed under pressure from the pipe line 36 to the dump cylinder 20 via the third pressure pipe line 44, the lift arm 17 is rotated upward by the protrusion of the piston rod 21 of the dump cylinder 20, and the dust box 10 is moved along the guide rail 22. Damp while guiding.

When the dump cylinder 20 reaches the stroke end, the limit switch 50 is turned on by a dog (not shown) provided on the piston rod 21 or the lift arm 17, etc.
Then, the on-off valve 46 is switched to the open position by the solenoid 49, and the head side of the shutter cylinder 27 communicates with the oil tank T via the on-off valve 46.

On the other hand, when the oil pressure in the main line 34 exceeds the specified value as the dump cylinder 20 reaches the stroke end, the hydraulic oil in the main line 34 is transferred from the line 40 through the IJ valve 38 and the line 51. It is fed under pressure to the rod side of the shutter cylinder 27.

Therefore, the piston rod 29 of the shutter cylinder 27
is reduced, the shutter 24 rotates upward to open the sweep opening 14, and the dust in the dust box 10 is discharged (see FIG. 4).

After releasing the dust, if the control valve 33 is switched to the non-cleaning position again, the oil in the dump cylinder 20 returns from the third pressure pipe 44 to the return pipe 37 to the oil tank T, so that the dump cylinder 20 is reduced. With the operation, the dust box 10 returns to the normal position, and at this time, the on-off valve 46 also returns to the closed position as the limit switch 50 is turned off.

Therefore, as described above, the hydraulic oil from the hydraulic pump P is pumped to the head side of the shutter cylinder 27, and the oil on the rond side is returned to the oil tank T. 14 returns to its original state to close it.

In the above embodiment, the shutter 24 opens and closes the sweep port 14 in conjunction with the rotation of the main brush 7 and the damping operation of the dust box 10, but this can be done using a completely separate hydraulic circuit. There is no problem in configuring it to control.

As described in detail above, the present invention adds a shutter to the dust box sweep opening so that the sweep opening can be opened and closed. Therefore, by keeping the shutter closed during normal driving, it is possible to keep the dust inside the dust box closed. This prevents the collected dust from spilling out, and when the dust is released, the dust box is completely damped before the shutter is opened, allowing the dust to be released all at once without scattering it far from the front wheels. be.

Furthermore, the present invention is configured such that the opening and closing operations of the shutter are performed in conjunction with the rotating operation of the main brush and the damping operation of the dust box, so that no special operation is required for opening and closing the shutter. The shutter can be opened and closed by switching between cleaning, non-cleaning, dumping, etc. using a conventional operating lever, and has the advantage that the operability is not complicated or difficult.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view showing an example of a power-driven vacuum cleaner, FIG. 2 is a side view showing the vehicle part with imaginary lines, and FIG. 3 is a main view showing the cleaning state. Part side view,
FIG. 4 is a side view of the main parts showing the damping state, and FIG. 5 is a hydraulic circuit diagram. 1...Main vehicle body part, 7...Main brush, 10...Dust box, 14...
・Sweeping port, 20...Dump cylinder, 22...
...Guide rail, 24...Shutter,
27... Shutter cylinder, 33...
・Control valve, M...Hydraulic motor, P
······Hydraulic pump.

Claims (1)

[Claims] 1. The cleaning chamber, which extends in the longitudinal direction of the vehicle and is spaced apart in the direction of lateral force, is formed in the lower blade approximately at the center of the main vehicle body.
A main brush for dust sweeping, which is rotated by a hydraulic motor, is installed inside, and a box storage space formed at the front of the main vehicle body has a sweeping port that doubles as a discharge port and opens opposite the main brush. A power-driven vacuum cleaner is equipped with a dust box that can be dumped by a lift arm that is rotatable up and down that is operated by a dump cylinder, and a shutter that is operated by a shutter cylinder is provided at a sweep opening of the dust box. In addition to being installed so that it can be opened and closed, the shutter cylinder is operated in the direction of closing the shutter when the control valve for the dust box is in the neutral position, and the control valve is operated in the drive position of the main brush hydraulic motor or the dump position of the dump cylinder for the dust box. A power-driven vacuum cleaner characterized in that a hydraulic circuit is configured such that a shutter cylinder is operated in a direction to open a shutter when the switch is switched to the shutter cylinder.