JPH0871024A - Floor cleaner - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] The present invention relates to a floor cleaning machine, which reduces the turning radius when changing the direction and prevents the vehicle from falling backward on a slope or a rough road with a step, thereby improving operability. An object is to provide an improved floor cleaning machine. [Structure] A bottom surface of a truck 1 is provided with a pair of driving wheels 2 and a driven wheel 3 in the front thereof at substantially the center thereof. In the floor cleaning machine equipped with the brush unit 6 and the suction nozzle 9, the auxiliary wheel 4 whose lower end is set to a required height h from the ground contact surface is provided at the rear part of the carriage, and the main body of the floor cleaning machine is rearward. And the center of gravity 5 of the main body is positioned in front of the drive shaft of the drive wheel in a state where the auxiliary wheel is grounded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor cleaning machine, and more particularly to a structure for arranging auxiliary wheels.

[0002]

2. Description of the Related Art A conventional floor cleaning machine will be described with reference to FIG. 5, 1 is a carriage, 2 is a drive wheel, 3 is a driven wheel, and 6 is a brush unit (not shown) having a motor and a water supply nozzle 6a in which two brushes are combined,
Reference numeral 8 denotes a dirty water tank of the water tanks mounted on the carriage 1, which is connected to the vacuum pump 10 and is connected from the suction nozzle 9 to the dirty water tank. Then, in front of or inside the brush unit 6 of the floor cleaning machine with the drive wheel 2, the cleaning liquid or fresh water is poured onto the floor surface from the fresh water tank 7 arranged in parallel with the dirty water tank along with the rotation of the brush, and after cleaning and polishing with the brush, dust is collected. The dirty residual water is sucked from the suction nozzle into the low pressure dirty water tank. However, when the body is turned, the center of gravity 5
Since the position is far from the drive shaft of the drive wheel, the radius of rotation is large, and when there is a slope or a step, it is easy to fall backward and there is a problem in the operability of the floor cleaner.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a floor cleaning machine, which has been made in view of the above-mentioned problems of the prior art. It is an object of the present invention to provide a floor cleaning machine that prevents falling of the vehicle to the rear and has improved operability.

[0004]

In order to achieve the above object, a pair of drive wheels, a driven wheel at the front of the drive wheel, a brush unit having a water supply nozzle, and a suction nozzle are arranged substantially at the center of the bottom surface of the carriage. In a floor cleaner equipped with a fresh water tank communicating with the water supply nozzle, a dirty water tank communicating with the suction nozzle, a vacuum pump, etc., on the bogie, at the rear of the bogie, the lower end from the ground surface. The feature is that an auxiliary wheel set to a required height is provided. Further, the main body of the floor cleaning device is tilted rearward, and the center of gravity of the main body is located in front of the drive shaft of the drive wheel in a state where the auxiliary wheel is in contact with the ground. Then, the required height from the ground contact surface of the auxiliary wheel is a mounting hole formed in a supporting leg mounting portion of the trolley corresponding to the mounting hole formed in the supporting leg and having a substantially oval shape that is long in the vertical direction. It is characterized in that it can be adjusted by the fixing hole of the bolt and the mounting bolt. Alternatively, the horizontal mounting position of the auxiliary wheel is a substantially oblong horizontal mounting hole formed in the supporting leg and a fixing hole for a mounting bolt formed in the supporting leg mounting portion of the truck corresponding to the mounting hole. And the mounting bolt can be adjusted.

[0005]

According to the present invention, a pair of drive wheels, a driven wheel at the front thereof, a brush unit having a water supply nozzle, and a suction nozzle are provided at approximately the center of the bottom surface of the carriage, and the above-mentioned In a floor cleaner equipped with a fresh water tank communicating with a water supply nozzle, a dirty water tank communicating with the suction nozzle, a vacuum pump, etc., an auxiliary wheel with a lower end set at a required height from the ground contact surface at the rear of the carriage. And the body of the floor cleaner tilts backward and the auxiliary wheel is in contact with the ground, the center of gravity of the body is located in front of the drive shaft of the drive wheel, and The required height from the grounding surface of the auxiliary wheel is a substantially oval vertical mounting hole formed in the support leg, and a mounting bolt formed in the support leg mounting portion of the bogie corresponding to the mounting hole. Adjustable with fixing holes and mounting bolts, or For the horizontal mounting position of the auxiliary wheel, attach a mounting hole to the support leg, and a mounting hole that is long in the horizontal direction and that is long in the horizontal direction. Since it can be adjusted with bolts, it usually has a three-wheel structure consisting of a driving wheel and a driven wheel, so the turning radius is small when changing direction, the driving wheel does not float on bad roads, and the ground pressure of the driving wheel is large and slips. On the other hand, the auxiliary wheels can prevent the fall when the vehicle leans backward on a slope or a bad road with steps.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The same parts as those in the conventional example have the same reference numerals. As shown in the side view of FIG. 1 and the rear view of FIG. 2, a trolley 1 is provided with a driving wheel 2, a driven wheel 3 in front, and an auxiliary wheel 4 in the rear. Further, a brush unit 6 having a water supply nozzle is mounted between the drive wheel 2 and the driven wheel 3. The trolley 1 is filled with a cleaning liquid or fresh water, and a sterilized water tub 8 which is inserted into the water supply nozzle, a sealed sewage tub 8 and a vacuum pump 10 are mounted, and sewage and dust on the floor are sucked behind the trolley. The suction nozzle 9 is arranged approximately in the width of the carriage, and is connected to the upper portion of the rear side surface of the waste water tank through a suction pipe (not shown). Here, the structure is such that the lower end of the auxiliary wheel is set to a required height h from the ground contact surface. For this reason, normally, the three-wheel structure including the drive wheel 2 and the driven wheel 3 has a small radius of rotation when the direction is changed, the drive wheel does not float on a bad road, and the ground pressure of the drive wheel is large to prevent slipping. On the other hand, when the main body is tilted rearward, the auxiliary wheels are grounded as shown in FIG. Even when the auxiliary wheels are in contact with the ground, the center of gravity 5 of the main body is located in front of the drive shaft of the drive wheels. Therefore, even in the case shown in FIG. 3, the main body can be returned to the normal horizontal state and can be prevented from tipping over when the vehicle leans backward on a slope or a bad road with steps. Further, as shown in FIG. 4, a mounting hole 4b of the supporting leg 4a is formed in a substantially oval shape in the vertical direction, and is fixed to a fixing hole of the supporting leg mounting portion 1a of the trolley by a mounting bolt 4c. The required height h from the ground contact surface can be adjusted. Therefore, the h can be set to an optimum value depending on the unevenness of the road surface. Alternatively, although not shown in the drawing, the mounting holes 4b of the supporting legs 4a are formed in a substantially oval shape in the horizontal direction, and are fixed to the fixing holes of the supporting leg mounting portion 1a of the trolley by the mounting bolts 4c. The horizontal position may be adjustable. Although the positions of the brush unit and the suction nozzle are specified in the above embodiment, the positions are not limited to these as long as they are the bottom of the carriage.

[0007]

As described above, according to the present invention, a pair of drive wheels, a driven wheel at the front thereof, a brush unit having a water supply nozzle, and a suction nozzle are arranged at approximately the center of the bottom surface of the carriage. , A fresh water tank communicating with the water supply nozzle on the carriage,
In a floor cleaning machine equipped with a waste water tank communicating with the suction nozzle and a vacuum pump, an auxiliary wheel having a lower end set to a required height from a ground surface is provided at a rear portion of the truck, and the floor cleaning is performed. With the main body of the machine tilted backward and the auxiliary wheels are in contact with the ground, the center of gravity of the main body should be located in front of the drive shaft of the drive wheels, and the required distance from the ground surface of the auxiliary wheels should be maintained. Adjust the height with the mounting holes formed in the support legs that are long in the vertical direction and the fixing holes for the mounting bolts that correspond to the mounting holes and that are formed in the support leg mounting portion of the truck, and the mounting bolts. If possible, or at the horizontal mounting position of the auxiliary wheel, a mounting hole formed in the supporting leg of the mounting hole and a mounting hole formed in the supporting leg mounting portion of the trolley corresponding to the mounting hole Since it can be adjusted with the fixing hole of and the mounting bolt Can reduce the rotation radius at the time of turning, also prevent falling backward in a rough road with a slope or step, it can provide a floor cleaning machine with improved operability.

[Brief description of drawings]

FIG. 1 is a side view of a floor cleaner according to an embodiment of the present invention.

FIG. 2 is a back view of the floor cleaning machine according to the embodiment of the present invention.

FIG. 3 is a side view showing a state where the floor cleaning machine according to the embodiment of the present invention is tilted rearward.

FIG. 4 is an enlarged side view of a main part of an auxiliary wheel in the floor cleaning machine according to the embodiment of the present invention.

FIG. 5 is a side view of a conventional floor cleaning machine.

[Explanation of symbols]

 1 trolley 1a Support leg mounting part 2 Drive wheel 3 Driven wheel 4 Auxiliary wheel 4a Auxiliary wheel support leg 4b Support leg mounting hole 4c Support leg mounting bolt 5 Center of gravity 6 Brush unit 6a Water supply nozzle 7 Fresh water tank 8 Waste water tank 9 Suction Nozzle 10 Vacuum pump h Required height

Claims (4)

[Claims] 1. A pair of drive wheels at approximately the center of the bottom surface of the bogie,
A driven wheel at its front part, a brush unit having a water supply nozzle, and a suction nozzle are arranged, and a fresh water tank communicating with the water supply nozzle, a dirty water tank communicating with the suction nozzle, and a vacuum pump are provided on a carriage. A floor cleaning machine equipped with the above, etc., characterized in that an auxiliary wheel whose lower end is set to a required height from a ground surface is provided at the rear part of the trolley. 2. The body of the floor cleaner tilts backward and the center of gravity of the body is located in front of the drive shaft of the drive wheel in a state where the auxiliary wheel is in contact with the ground. The floor cleaning machine according to Item 1. 3. A mounting hole having a required height of the auxiliary wheel, the mounting hole being formed in a supporting leg of the supporting wheel, the mounting hole being formed in a supporting leg mounting portion of a trolley corresponding to the mounting hole. 3. The floor cleaning machine according to claim 1, wherein the floor cleaning machine is adjustable by means of the fixing hole and the mounting bolt. 4. The horizontal mounting position of the auxiliary wheel is a substantially oval horizontal mounting hole formed in the support leg of the auxiliary wheel, and a mounting bolt formed in the support leg mounting portion of the truck corresponding to the mounting hole. 3. The floor cleaning machine according to claim 1, wherein the floor cleaning machine is adjustable by means of the fixing hole and the mounting bolt.