JP2769715B2 - Speed controller for floor washer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is used in the technical field of a floor cleaning machine for cleaning a floor with a brush (pad). The present invention relates to a speed adjusting device for a floor cleaning machine in which the running speed of the surface cleaning machine can be arbitrarily adjusted in accordance with the degree of cleaning.

[Conventional technology]

A floor scrubber (scrubber) configured to wash the floor with a rotating brush while spraying a detergent solution or fresh water, and to absorb and wipe off the cleaning wastewater with a squeegee,
A self-propelled walking system in which workers drive the washer while walking,
There is a self-propelled boarding type in which an operator rides on a washing machine and operates.In the case of a self-propelled walking type floor washing machine, an operation handle is provided at the rear of the vehicle body, and after turning on the main switch, this handle is used. When the operator pushes down, the traveling motor operates and the car body travels, and the rotating surface and the squeegee are used to clean and absorb the floor surface, and to wipe off the floor. It is configured such that it can be arbitrarily adjusted by a hand lever provided on the operation handle.

However, as described above, the floor washer having a structure that travels when the operating handle is pressed down is easy to operate in terms of operation from top to bottom, and has the advantage of not being tired even for long hours of operation, There was a danger of accidentally pushing down the operating handle and inadvertently driving.

Therefore, the operation panel provided at the rear of the vehicle
Provide a neutral-reverse seesaw safety switch,
A safety device having a structure in which the safety switch is switched from [neutral] to [forward] or [reverse] after the main switch is turned on, and the vehicle is driven by depressing the operation handle has been considered.

[Problems to be solved by the invention]

However, even if the above-described safety device is provided, if the safety switch is set to, for example, [forward], there is a danger that the washing machine will run on its own if the operation handle is erroneously operated. It was not a practical solution.

In addition, it is necessary to perform the switching operation of the safety switch and the lever operation for speed adjustment while depressing the operation handle, which is very troublesome and has a problem with safety, and if a brake operation is added to this, In addition, there is a problem that the driving operation becomes more and more complicated, and it is impossible to drive safely unless a specialized worker is used, and there is a problem that women and the like cannot easily drive.

Therefore, a technical problem of the present invention is to prevent a dangerous runaway due to an erroneous operation of an operation handle, and also to make it possible to control a speed and a brake operation extremely easily, so that anyone can operate a floor washer safely. It is.

[Means for solving the problem]

Means taken in the present invention to solve the above technical problems are as follows.

When the operating handle is pressed down against the resilience, the drive motor switch is turned on to enable running, and when the operating handle is released, the operating handle is automatically reset, and the switch is turned off. (1) A hand switch provided on the operation handle while the operation handle is depressed to turn on the switch of the travel motor. Only when the vehicle is turned on, there is provided a running motor starting means configured to start the running motor and start the running of the washer.

(2) After the running motor starts and starts running, the operation handle is depressed to turn off the hand switch while the running motor switch is turned on. Speed accelerating means for increasing the number of revolutions and allowing the washing machine to run at the set normal speed is provided.

(3) After the traveling motor is started and traveling starts, the operation handle is depressed and the switch of the traveling motor is kept turned on while the switch of the traveling motor is kept on, or when the switch is turned on again. A speed reduction means for causing the washing machine to run at a reduced speed while suppressing the rotation speed of the traveling motor to a set minimum speed.

(4) When the operating handle is depressed, the electromagnetic brake built into the traveling motor is released in the first stage, and then the traveling motor is switched on in the second stage.

[Action]

 The above means works as follows.

In the element described in the above (1), even if the operation handle is pushed down and the switch of the traveling motor is turned on, the washing machine does not run unless the hand switch provided on the operation handle is turned on. The runaway of the aircraft can be prevented.

After the running of the washing machine is started by turning on the driving motor by pressing down the operation handle and the element described in the above (2) and turning on the hand switch, simply release the hand switch to turn off the hand switch. Since the speed of the washing machine can be increased to a normal speed, the speed of the washing machine can be adjusted very easily and safely.

The factor described in the above (3) is that if the hand switch is kept on at the start of the washer, the speed of the washer can be suppressed to the minimum speed, so that the curve operation and the U-turn operation at the start can be easily performed. In addition to being able to be performed safely, it is also possible to easily perform a curve operation or a U-turn operation during normal operation simply by turning on the hand switch.

The elements described in the above (4) can be operated by inertia during running or downhill, etc. by releasing the electromagnetic brake by depressing the first stage of the operation handle, so that the moving operation of the washer becomes easy. At the same time, when the operating handle is released, the electromagnetic brake is applied and the parking brake is applied in the same manner as when the traveling motor stops, so that it is safe in an emergency or the like, and the slope can be stopped.

As described above, the technical problems described above can be solved by the above means, and the problems of the conventional technology can be solved.

〔Example〕

Hereinafter, a preferred embodiment of the speed controller for a floor washer according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are a side view and a plan view, respectively, showing an example of a floor cleaning machine to which a speed adjusting device according to the present invention is attached.
In the figure, 1 is a vehicle body, 2a and 2b are wheels and casters for traveling, 2M
Denotes a running motor for rotating the wheels 2a, 2T denotes an electromagnetic brake built in the motor 2M, and 3 denotes a cleaning brush rotated by the motor 3M.

5S and 5T are for fresh water (for detergent liquid) mounted on the vehicle body 1.
The fresh water tank 5S supplies fresh water or detergent liquid for cleaning to the brush 3 from the fresh water tank 5S. 4 is a sewage suction blower attached to the sewage tank 5T, which is rotated by a motor 4M.
The suction force acts on the squeegee 7 through the sewage tank 5T and the water absorption hose 6 to suck and collect the cleaning sewage on the floor surface into the sewage tank 5T.

Reference numeral 8 denotes an operation handle which is vertically rotatably mounted on left and right brackets 1a, 1a projecting from both ends 8a, 8a on the rear surface of the vehicle body 1. The handle 8 receives a pulling action of a spring (not shown). The horizontal position (see FIG. 1) is always maintained. Reference numeral 9 denotes a hand switch attached to the operation handle 8 for both starting and speed adjustment, and reference numerals 10 and 11 denote the squeegee 7 attached to the vehicle body 1 via a rotating piece 7a.
, A lever that moves up and down via the suspension string 7b, MS denotes a main switch for operation, and V denotes a power supply battery for each of the motors 2M, 3M, and 4M.

FIG. 3 is a block diagram showing the traveling switch mechanism of the operating handle 8. In the drawing, reference numerals 8b and 8c denote double cams connected to the end 8a of the handle 8, and 12 and 13 designate cams. When the operating handle 8 is depressed by these micro switches which are turned on and off in sequence by the dual cams 8b and 8c, the first cam 8b turns on the first micro switch 12 in the first stage, and the electromagnetic brake described above is turned on. Release 2T, then 2nd stage, 2nd cam
8c is a mechanism in which the second microswitch 13 is turned on, and the switch 2S (see FIG. 4) of the traveling motor 2M is turned on. When released, the operating handle 8 is automatically returned to the horizontal position by a spring and rotated, so that the second micro switch 13 and the first micro switch 12 are sequentially turned off.

FIG. 4 is a block diagram showing an electrical configuration of the present invention, in which a CPU 21 and a memory 22 storing a system program are stored.
The control unit 20 includes the motors 2M, 3M, 4M and the electromagnetic brake 2T, the battery V, and the switches 9, 12, 1 through the bus 23 and the interface circuit 24.
3 are connected, and these motors 2M, 3M, 4M and the electromagnetic brake 2T are turned on / off signals sent from the switches 9, 12, 13 in accordance with the system program stored in the memory 22. Each is controlled and operated to operate the floor washer.

The memory 22 is stored in the memory 22 only when the hand switch 9 is turned on while the operation handle 8 is pressed down and the switch 2S of the running motor 2M is turned on. After the motor start program (motor starting means) for starting the 2M and the running motor 2M are started, the operating handle 8 is pressed down and the switch 2S of the running motor 2M is turned on, and the above-mentioned hand is held. When the switch 9 is turned off, a speed acceleration program (speed acceleration means) for increasing the rotation speed of the traveling motor 2M to a normal speed is stored.

Further, after the running motor 2M is started, the operation handle 8 is depressed after the running motor 2M is started, and the switch 2S of the running motor 2M is continuously turned on. A speed deceleration program (speed deceleration means) for decelerating to a minimum speed at which the number of rotations is set is stored.

FIG. 5 is a flowchart for explaining the processing procedure of the speed adjustment for the floor cleaning machine executed according to the program stored in the memory 22.

That is, when the main switch MS is turned on in step S1, and then the operation handle 8 is pressed down in step S2, first, the third step S3 is executed in the first stage, and the first micro switch 12 is turned on. The fourth step S4 is executed to release the electromagnetic brake 2T.

Next, the fifth step S5 is executed in the second stage, and the second step
The micro switch 13 is turned on, the sixth step S6 is executed, and the switch 2S of the traveling motor 2M is turned on.

In this state, that is, in a state where the first and second micro switches 12 and 13 are turned on by pushing down the operation handle 8, furthermore,
When the hand switch 9 is turned on in the seventh step S7, the next step S8 is executed, and only here, the traveling motor 2M starts operating, and the wheels 2a are rotated to start the washing machine.

After the start, first, a ninth step S9 is executed,
It is determined whether the hand switch 9 remains on or off.

When it is determined in step S9 that the hand switch 9 is turned on, the next step S10 is executed, and the traveling motor 2 is turned on.
The number of rotations of M is reduced, and the washing machine runs at the set minimum speed. On the other hand, when it is determined that the hand switch 9 is turned off in the ninth step S9,
Step S11 is executed to increase the rotation speed of the traveling motor 2M, and cause the washer to travel at the set regular speed.

In the next step S12, it is determined whether or not the operation handle 8 has been raised, that is, whether or not the first and second micro switches 12, 13 have been turned off. , 13 are turned off, first, the switch 2S of the traveling motor 2M is turned off in step S13, then, in step S14, the traveling motor 2M is stopped, and in the next step S15, the electromagnetic brake 2T is driven by the traveling motor. Two
Lock M and stop driving.

If it is determined that the operation handle 8 is not depressed in the twelfth step S12 described above, steps S9 and S1 are performed.
Steps S0 and S11 are repeatedly executed, and the traveling of the cleaning machine is continued.
Further, even after the depression of the operating handle 8 is released, unless the main switch MS is turned off in step S16, if the operating handle 8 is pressed again, each step from step S3 is executed again, and the washing machine can be freely operated. Needless to say, it is possible to drive the vehicle.

〔effect〕

Since the speed controller for a floor washer according to the present invention is as described above, it does not start only by depressing the operation handle, and does not start unless the hand switch is pressed together. In addition to preventing erroneous operation caused by hanging and running, the speed of the washing machine can be switched between minimum speed and regular speed simply by turning on and off the hand switch provided on the operation handle, so operation is easy and anyone However, it has the advantage of safe driving, and the operating handle releases the electromagnetic brake in one stage and switches on the traveling motor in the second stage.
Since the step system is adopted, it is possible to perform various traveling such as being able to coast by running the washing machine by releasing only the electromagnetic brake or downhill etc. It is suitable for a floor cleaning machine.

[Brief description of the drawings]

1 and 2 are a side view and a plan view of a floor washer provided with a speed adjusting device according to the present invention, FIG. 3 is a configuration diagram of a switch mechanism portion of an operation handle, and FIG. FIG. 5 is a block diagram showing an electric configuration, and FIG. 5 is a flowchart for explaining a processing procedure of the traveling operation. 1 is a vehicle body, 2a is a wheel, 2M is a running motor, 2S is a switch, 2T is an electromagnetic brake, 8 is an operation handle, 9 is a hand switch, 12 and 13 are first and second micro switches, and 20 is a control unit. .

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tetsu Arai 8123 Kiga, Hosoe-cho, Husa-gun, Shizuoka Tokai Amano Corporation (58) Field surveyed (Int. Cl. ⁶ , DB name) A47L 11/00-11 / 40 E01H 1/08 B60K 41/20

Claims (2)

(57) [Claims] When the operating handle is depressed against the resilience, a switch of the traveling motor is turned on to enable traveling, and when the operating handle is released, the operating handle automatically returns. In addition, in the floor washer configured so that the switch is turned off to stop traveling, the operation handle is provided on the operation handle in a state where the operation handle is pressed down to turn on the switch of the traveling motor. Only when the hand switch is turned on, the starting means for the running motor configured to start the running motor and start the running of the washing machine, and after the running motor starts and starts running. If the hand switch is turned off while the operation handle is depressed and the switch of the traveling motor is turned on, the rotation speed of the traveling motor is increased to start the washing machine. A speed acceleration means capable of running at a fixed regular speed, and after the running motor is started and running, the operation handle is depressed and the switch of the running motor is turned on, and the above-mentioned hand is maintained. A floor-cleaning device comprising: a speed reduction unit that keeps the switch on or keeps turning on the switch again, and controls the rotation speed of the traveling motor to a set minimum speed so that the cleaning machine travels at a reduced speed. Speed control device for machine. 2. The system according to claim 1, wherein when the operating handle is depressed, the electromagnetic brake built into the traveling motor is released in the first stage, and then the traveling motor is switched on in the second stage. The speed controller for a floor cleaning machine according to claim 1.