JPH079244U - Floor cleaner - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a floor cleaning machine having a water level adjusting mechanism that does not apply an excessive load to a blow pump. [Structure] The traveling unit travels with two front wheels 5 and two rear wheels 6 arranged at the bottom of the vehicle body, and the cleaning unit is provided on a trolley at the bottom of the vehicle body and rotates with a rotating brush in contact with the floor surface. , A clean water tank for containing cleaning liquid, a squeegee for sucking dust and dirty water after cleaning, and a sewage tank for storing dust and dirty water sucked from this squeegee. At the upper part of the sewage tank of the floor cleaning machine, a sewage drain hole for sucking the sewage on the floor from the squeegee and an intake hole for an intake pipe connected to a blow pump for depressurizing the inside of the tank to suck the sewage are opened. Further, a float switch is arranged at a predetermined height position in the dirty water tank, and a sluice valve is provided near the lower part of the intake hole of the intake pipe in combination with the float switch.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a floor cleaning machine with a water level adjusting function for sewage.

[0002]

[Prior art]

 Conventionally, floor cleaning machines have been generally commercialized for the purpose of labor saving in floor cleaning work in buildings and factories. This type of floor cleaning device is equipped with a cleaning tool such as a rotating brush that polishes the floor or a squeegee that performs a vacuum operation, and automatically cleans the floor while the entire device is running. FIG. 3 is a perspective sectional view showing the construction of such a floor cleaning machine, which is roughly divided into a traveling section, a cleaning section, a power source section and the like. The traveling section is driven by two front wheels 55 and two rear wheels 56, which are respectively disposed on the lower portion of the vehicle body, and the cleaning portion is disposed on the trolley at the lower portion of the vehicle body, and is a rotating brush 51 that rotates in contact with the floor surface. It is composed of a clean water tank 52 for containing cleaning liquid, a squeegee 53 for sucking dust and dirty water after cleaning, and a sewage tank 54 for storing dust and dirty water sucked from the squeegee 53. The power supply section supplies a power source for rotating the cleaning rotary brush 51, a driving power source for the blow pump 57 for sucking the dirty water into the dirty water tank 54 by the squeegee 53, and the like. The floor cleaning machine performs cleaning work as follows. That is, the cleaning liquid contained in the fresh water tank 52 is sprinkled on the floor surface, and the rotating brush 51 disposed at the lower part of the vehicle body is rotating to polish the floor surface, and dust and dirty water are moved along with the forward movement of the rotating brush 51. It is sucked by the squeegee 53 disposed at the rear of the and collected in the dirty water tank 54. In the upper part of the sewage tank 54, a drain hole 59 curved in an inverted U shape of a sewage pipe 58 for absorbing sewage from the squeegee 53, and an intake pipe 60 connected to a blow pump 57 for depressurizing the inside of the tank to suck up sewage The intake hole 61 is open. However, if sewage flows into the blow pump 57 from the intake hole 61 through the intake pipe 60, it may cause a failure of the blow pump. Therefore, the water level 62 on the sewage surface should not be higher than the intake hole 61. Therefore, it was necessary to prevent the dirty water from flowing into the intake pipe 60. As a method for this, conventionally, a float switch 63 is arranged at a predetermined height position in the tank, and when the sewage surface reaches this predetermined height, the float switch 63 is actuated, whereby the blow switch 63 is blown. Some stopped the pump 57 to suppress the rise of the sewage surface. Further, when the float switch 63 fails, a float valve 68 is provided in the intake suction hole 61 of the blow pump in combination with the float switch, and the float valve operates when the height of the float valve reaches the level of the dirty water. In some cases, this blocks the air outlet and suppresses the rise of the sewage surface. However, the above method has a problem that the air intake / suction port is frequently opened and closed by the float valve every time the surface of the dirty water rises and falls, and an excessive load is applied to the decompression pump each time. It was a thing.

[0003]

[Problems to be solved by the device]

 In view of the above conventional problems, the present invention is to provide a floor cleaning machine having a water level adjusting mechanism that does not apply an excessive load to a blow pump.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention has a through-hole and a partition valve that opens and closes the through-hole in a partition that separates a dirty water tank and a fresh water tank, and positions where the through-hole and the partition valve are arranged. Is near the lower part of the intake hole of the decompression pipe.

[0005]

[Action]

 With the above configuration, in the floor cleaning device according to the present invention, when the sewage surface of the sewage tank reaches a predetermined height, the sluice valve opens to the fresh water tank side to remove the sewage. When draining to the fresh water tank side and the sewage surface of the sewage tank does not reach the prescribed height, the sluice valve is closed so that the sewage water level of the sewage tank does not exceed the prescribed height. You can

[0006]

【Example】

 An embodiment of a floor cleaning machine according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of an essential part of a floor cleaning machine according to the present invention. The traveling part is driven by two front wheels 5 and two rear wheels 6 arranged at the lower part of the vehicle body, and the cleaning part is a trolley at the lower part of the vehicle body. A rotating brush 1 that rotates in contact with the floor, a clean water tank 2 that contains cleaning liquid, a squeegee 3 that sucks dust and dirty water after cleaning, and a dirty water that stores dust and dirty water sucked from this squeegee 3. It is composed of a tank 4 and the like. At the upper part of the sewage tank 4 of the floor cleaner, there are a drain hole 9 for sewage 8 that absorbs sewage on the floor 14 from the squeegee 3 that is a sewage suction port, and a blow pump 7 that depressurizes the tank and sucks sewage. The intake hole 11 of the connected intake pipe 10 is opened. The float switch 13 is arranged at a predetermined height position in the dirty water tank, and the sluice valve 15 is provided near the lower part of the intake hole of the intake pipe in combination with the method of the float switch.

Next, the operation of the floor cleaning machine will be described with reference to the cross-sectional view of the main part of FIG. In the embodiment shown in FIG. 2, a drain port 39 of a pipe 38 for sucking dirty water from the squeegee 33 and an intake air connected to a blow pump 37 for depressurizing the inside of the tank are provided above the dirty water tank 34 of the floor cleaner. The hole 41 is open. A partition valve 45 and a through hole 47 are provided in a partition wall 46 between the dirty water tank 34 and the fresh water tank 32. When the water level 42 on the dirty water surface is lower than the height of the partition valve 45, the blow pump 37 is used to discharge the dirty water tank 34. Since the side pressure is reduced and the atmospheric pressure becomes lower than that of the fresh water tank 32 side, the sluice valve 45 is pressed against the partition wall 46 side, and the through hole 47 is closed. As a result, the pressure reduction in the dirty water tank by the blow pump 37 is promoted, the suction of the dirty water into the tank is promoted, and the water level 42 on the dirty water surface rises. When the water level on the sewage surface eventually exceeds the height of the sluice valve 45, the sewage water pressure causes the sluice valve 15 to open to the fresh water tank 2 side so that the sewage passes through the through hole 17, as shown in FIG. Through it to the fresh water tank side and the water level in the dirty water tank drops. Since the positions of the through hole 17 and the sluice valve 15 are near the lower part of the intake hole of the decompression pipe, the water level 12 on the sewage surface does not reach the intake hole 14, and the sewage flows into the blow pump 7. There is no such thing.

[0008]

[Effect of device]

 As described above, according to the floor cleaning device of the present invention, since the partition valve is arranged on the partition wall between the waste water tank and the fresh water tank, the waste water surface may reach the air outlet of the blow pump. In addition, since the wastewater does not flow into the tank through the opening of the blow pump, the life of the tank can be extended without overloading the vacuum pump.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a floor cleaner according to the present invention.

FIG. 2 is a sectional view of an essential part for explaining the operation of the floor cleaning machine according to the present invention.

FIG. 3 is a sectional view of a main part of a conventional floor cleaning machine.

[Explanation of symbols]

 1 Rotating brush 2 Fresh water tank 3 Squeegee 4 Sewage tank 5 Front wheel 6 Rear wheel 7 Blow pump 8 Sewage pipe 9 Drain hole 10 Intake pipe 11 Intake hole 12 Water level 13 Float switch 14 Floor surface 15 Gate valve 16 Partition wall 17 Through hole

Claims (2)

[Scope of utility model registration request] 1. A running portion that is driven by front wheels and rear wheels disposed at a lower portion of a vehicle body, a rotating brush for cleaning that is disposed at a lower portion of the vehicle body and rotates in contact with a floor surface, and a fresh water tank that contains a cleaning liquid. And a squeegee for sucking dust and dirty water after cleaning, and a cleaning unit composed of a sewage tank for storing the dust and dirty water sucked from this squeegee, a power source for rotating the brush, and a sewage tank by the squeegee. A power supply unit for supplying a drive power source of a blow pump for sucking sewage, a traveling unit, a cleaning unit, a power supply unit, and a fresh water tank and a sewage tank of the cleaning unit are partitioned by a partition wall, Having a fresh water sprinkling pipe at the bottom, penetrating the floor surface of the sewage tank, at one end having an intake hole protruding above the sewage water storage section of the sewage tank,
The other end has a pressure reducing pipe connected to a blow pump disposed outside the wastewater tank, a wastewater discharge hole protruding above the wastewater storage portion of the wastewater tank at one end, and the other end of the floor of the wastewater tank. In a floor cleaning machine having a sewage pipe having a sewage suction port at a position facing the floor surface, a through hole at a position lower than the intake hole of the decompression pipe of the partition wall of the fresh water tank and the sewage tank. A sluice valve that opens and closes this through hole is provided, and when the sewage surface of the sewage tank reaches a predetermined height, the sluice valve opens to the fresh water tank side so that the sewage flows to the fresh water tank side. The floor surface, which is characterized in that the sewage water flows out and the sewage water of the sewage tank does not reach a predetermined height so that the sluice valve is closed so that the sewage water does not flow to the fresh water tank side.掃機. 2. A float switch is provided above the waste water tank according to claim 1, and the through hole and a partition valve are used together to provide a safety device in case of failure of the float switch. The floor cleaning machine according to claim 1.