JPH05305047A - Carpet cleaner and detergent feed control method for carpet cleaner - Google Patents

Abstract

PURPOSE:To provide a carpet cleaner capable of feeding the optimum quantity of bubbles for cleaning to the carpet surface by invariably stabilizing the feed quantity of a detergent, the generation quantity of bubbles, and the homogeneity of bubbles. CONSTITUTION:The discharge air of a blower 20 applying the suction force sucking bubbles to a nozzle 25 is fed to a bubble generator 15 coupled with porous bodies with different meshes and a blowout port 21c to feed finely rectified bubbles and dry the carpet surface after cleaning, and the revolving speed of a pump 13 feeding a detergent to the bubble generator 15 is controlled in response to the speed of the carpet cleaner detected by a speed sensor to adjust the feed quantity of bubbles.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is devised so that foam of a detergent liquid is brushed with a cleaning brush while being supplied to a carpet surface, and dirty water (foam) after cleaning is sucked by a nozzle and collected in a dirty water tank. The present invention relates to a carpet cleaning machine and a method for controlling the supply of a detergent solution suitable for use in the carpet cleaning machine.

[0002]

2. Description of the Related Art A dry-form type carpet cleaning machine for preparing bubbles in advance and brushing them with a cleaning brush while dripping the bubbles onto the surface of the carpet to remove dirt on the surface has been conventionally known from Japanese Patent Application Laid-Open No. 57-57. -142228 gazette, the same 58-440.
25, 58-83929 and 60-3.
There are various types of structures as seen in Japanese Patent No. 4426, etc., but all of these carpet cleaning machines only perform brush cleaning while dropping bubbles, and after cleaning, the surface of the carpet becomes dirty ( Since the sewage) remains as it is, it takes a lot of time and labor to remove it, and the drying time becomes long.

On the other hand, the carpet cleaning machine described in Japanese Patent Laid-Open No. 58-61720 has a foam generator for generating foam and a rotary brush for brushing, and also collects suction of foam after cleaning. Since the mouth (nozzle) is provided, there is an advantage that the drying time after the cleaning can be shortened by sucking the foam soiled by the cleaning into the recovery port.

[0004]

However, in the case of the carpet washing machine described in the above-mentioned Japanese Patent Laid-Open No. 58-61720, in addition to the washing machine, a blower or the like which exerts a suction action on the recovery port. However, there is a problem that the structure of the entire washing machine is complicated and the price is increased.
In addition, the above-mentioned recovery port cannot completely absorb the moisture that has penetrated into the fiber by simply absorbing the dirty foam after cleaning from the surface of the carpet, so even if it is said that the finish is quick, it will be completely dry. There was a problem that it took quite a while.

In addition, in the conventional carpet washing machines described in the above-mentioned publications, detergent liquid is pressurized by a pump or a turbine to form bubbles, and the bubbles are dropped on the surface of the carpet for brushing. However, there is no means for adjusting the amount of foam to be dropped to an amount suitable for cleaning in any conventional carpet cleaning machine, and there is a problem that the cleaning effect varies depending on the amount of foam. ..

That is, if the amount of the dropped (supplied) foam is too large, there is a problem that it becomes difficult to dry or that the detergent liquid remains in the fibers of the carpet. On the contrary, if it is too small, sufficient cleaning cannot be performed and stains occur. There is a problem that it remains, especially in the case of a carpet washing machine in which a worker pulls by hand and cleans while running, because there is considerable variation in the running speed depending on the worker, regardless of the running speed. When a constant amount of foam is constantly supplied, various problems due to the above-mentioned excessive supply or insufficient supply occur.

Therefore, a technical object of the present invention is to supply the optimum amount of foam to the carpet surface for cleaning by making the supply amount of the detergent liquid, the foam generation amount, and the homogeneity of the foam always stable. It is to be.

[0008]

[Means for Solving the Problems] Means taken in the present invention for solving the above technical problems are as follows. In a carpet washer configured such that foam of detergent liquid is supplied to the surface of the carpet by the pressure of the pump while running and brushed with a cleaning brush, and the waste water after brushing is sucked into a waste water tank through a nozzle. And

(1) The exhaust of the blower which exerts a suction action on the nozzle through the waste water tank is supplied as pressurized air through a duct to a foam generator which foams the detergent liquid and supplies it to the carpet surface. It should be configured so that it is supplied as drying air through a duct to the air outlet provided between the cleaning brush and the nozzle.

(2) A foam generator for supplying foam of detergent liquid to the carpet surface, a main pipe to which a detergent liquid supply pipe and a blower exhaust supply pipe are connected, and a discharge which is horizontally connected to the lower end of the main pipe. The main pipe is composed of two kinds of porous bodies having different ventilation rates, which are connected in series, and the bottom of the discharge pipe is provided with a bubble discharge hole.

(3) A speed sensor configured to detect a traveling speed by constantly pressing a sensor wheel mounted between the left and right traveling wheels against the surface of the carpet by the force of a spring.

(4) The washing area is calculated from the traveling speed of the carpet washer detected by the speed sensor and the width of the washing brush, and the total amount of detergent solution used is calculated from the washing area and the required amount of detergent solution per square. And calculate the number of revolutions of the pump from the total amount of use and the amount of discharge per revolution of the pump, and rotate the pump at the calculated number of revolutions to supply the detergent liquid to the foam generator. ..

[0013]

The above means operates as follows. According to the above-mentioned means (1), the suction force and the exhaust force of one blower are exerted on the nozzle, the bubble generator and the air outlet to collectively generate and supply the bubble and suck the bubble. Since it is possible to reduce the cost by simplifying the structure of the carpet cleaning machine, the exhaust time of the blower is blown from the air outlet toward the cleaned carpet surface, reducing the drying time of the carpet wet with foam. Similarly, since the blower exhaust gas is supplied to the foam generator to forcefully generate foam, it is not necessary to increase the pressure of the pump that supplies the detergent liquid to the foam generator, and therefore the size is small. Enables the use of low pressure pumps to further reduce the cost of carpet washing machines.

According to the above-mentioned means (2), the detergent liquid supplied to the main pipe is compressed by passing it through the porous body by applying a pressure from the exhaust of the blower and passing it through the porous body. The bubbles can be generated and discharged from the discharge hole of the pipe to the carpet surface, and two types of porous bodies with different ventilation rates (mesh or cell) can be used in series. Because
For example, if a porous body having a fine mesh is first passed and then a porous body having a coarse mesh is passed, the size of bubbles can be made uniform by repeating compression action twice with different strengths. In addition, it is possible to provide the optimum foam for cleaning with fine grain because the wood grain is kept in an independent state without the foam being integrated again.

According to the above-mentioned means (3), the traveling speed of the carpet washer can be accurately measured and the spring can be accurately measured even when the carpet washer is traveling straight and curved. Since the speed sensor is pressed against the carpet surface by the force of (1) and is grounded in a stable state, it is possible to measure the traveling speed without error regardless of the unevenness of the carpet surface.

According to the above-mentioned means (4), the amount of detergent liquid used per area can be set to a predetermined amount.
Therefore, when the traveling speed of the carpet washing machine becomes faster, the rotation speed of the pump increases and the supply amount of the detergent liquid increases, while when the traveling speed becomes slower, the rotation speed of the pump decreases and the supply amount of the detergent liquid decreases. It is possible to supply a detergent liquid at a constant ratio (detergent weight ratio) with respect to the weight of the carpet and to exert an excellent cleaning effect. 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.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the above-described carpet cleaning machine and a method for controlling the supply of detergent liquid in the carpet cleaning machine according to the present invention will be described in detail below with reference to the accompanying drawings. 1 is a partial cross-sectional side view of a carpet cleaning machine according to the present invention, and FIG.
Is also a partial sectional front view, and in these drawings, 1 is a machine body, 2 and 3 are tanks of detergent solution S and waste water DW contained in the machine body 1, 1a is a handle attached to the rear part of the body 1, 1b is both tanks 2,
A cover body for covering the upper surface of 3; 1T, a body frame provided on the bottom surface of the body 1; 4; a drainage drain hose attached to the wastewater tank 3; 1R is a display panel provided on the rear part of the machine body 1, where a display part for digitally displaying the speed of the carpet cleaning machine, for example, by a bar graph, and a power ON / OFF
A display unit, a blower suction ON / OFF display unit, and a brush rotation ON / OFF display unit are provided.

Next, 5a is an axle having left and right running wheels 5, 5 attached thereto, 6 is a sensor wheel for detecting the running speed of the carpet cleaning machine, and 6S is a speed sensor. Of the rotating arm 7 in which the upper end of the bracket 1Ta is vertically attached to the bracket 1Ta vertically extending from the bottom surface of the machine body frame 1T so as to be located in the middle of the traveling wheels 5 and 5. It is attached to the lower end,
The spring 7S attached to the rotating arm 7 receives the pulling power of the spring 7S to constantly contact the carpet surface with a constant pressure so that the traveling speed of the carpet washing machine can be accurately transmitted to the speed sensor 6S for measurement. ..

Reference numeral 8 denotes a foot lever attached to a bracket 1Tb vertically provided at a central portion of the machine body frame 1T by means of a shaft 1Tc so as to be vertically rotatable. When the foot plate 8a of the foot lever 8 is depressed downward, Pressing shaft 8b attached to the tip
4 guide poles 1Td in total for the seat plate indicated by 9
(The other three are not shown in the drawing) and is raised so that the cleaning brush and the like attached to the seat plate 9 can be lifted.

Reference numerals 10 and 11 are a pair of front and rear cleaning brushes attached to the lower side of the seat plate 9, and these cleaning brushes 10 and 11 are similarly attached to the seat plate 9 using a fixed ring 9a. The motor 12 is used as a drive source to relatively rotate to brush the carpet surface. That is, 1
Reference numerals 0a and 11a are interlocking gears that mesh with the drive gear 12a of the motor 12 and rotate in a relatively interlocking manner.
And pulleys 10c and 11c attached to the tips of the rotating shafts 10d and 11d attached to the cleaning brushes 10 and 1a.
The belts 10V and 11V are hung between the pulleys 10b and 11b attached to the rotating shaft of the cleaning brush 1.
0 and 11 rotate relative to each other to brush the carpet surface.

Reference numeral 13 is a pump which is also attached to the seat plate 9. The suction pipe 13a of the pump 13 is inserted into the above-mentioned detergent liquid tank 2 so that the detergent liquid S can be sucked through the strainer 14, The delivery pipe 13b is also connected to the foam generator 15 mounted on the seat plate 9, and the detergent liquid S sucked from the detergent liquid tank 2 through the suction pipe 13a is supplied to the foam generator 15 to generate bubbles. Is configured to.

The bubble generator 15 is formed by connecting a discharge pipe 16 to the lower end of a straight pipe type main pipe 15b as shown in FIG.
The delivery pipe 13b of the pump 13 is connected to the upper end of the main pipe 15b, and the branch pipe 15a laterally branched to the upper end of the main pipe 15b has a hose 21a for supplying the exhaust air of an air blower described later. Two types of upper and lower porous bodies 15S and 15T having different airflow rates are connected in series inside the main pipe 15b, and further, a large number of bubble discharge holes 16a are formed on the bottom surface of the discharge pipe 16. ... has been drilled.

As the porous bodies 15S and 15T, for example, polyurethane foams having different numbers of cells are used. That is, the number of cells of the upper porous body 15S is 11 to 1
Using 6 fine mesh polyurethane foam,
The lower porous body 15T uses a polyurethane mesh having a coarse mesh with a cell number of 6 to 10, and first applies a strong compressive force to the detergent liquid supplied by the fine mesh porous body 15S of the first stage. Fine bubbles, then the second
By passing the coarse mesh porous body 15T, the bubbles are made uniform in size, and the bubbles are rectified so that the bubbles are not integrated with each other to form an optimal bubble having a fine grain, and this is discharged. It is constructed so that it can be dropped onto the carpet surface from the pipe 16 through the discharge holes 16a.

Next, 20 is a blower mounted inside the machine frame 1T, and the suction pipe 22 of this blower 20 stands up so that the inlet 22a, to which the float valve 22b is mounted, protrudes above the inside of the dirty water tank 3. The suction hose 24 which is installed to exert a suction action in the dirty water tank 3 and has its tip opening 24a opened in the dirty water tank 3
The exhaust duct 21 connected to the exhaust port (discharge port) of the blower 20 is bifurcated in the middle, and the hose 21a is connected to one port of the blower 20. Via the hose 21b to the air outlet 21c provided between the nozzle 25 and the cleaning brush 10. And blower 2
The exhaust air discharged from 0 is sent to the bubble generator 15 and the air outlet 21c to generate bubbles and dry the carpet surface.

As shown in FIG. 1, the nozzle 25 is provided with a suction port 25a at the lower end and a connection port 25b at the upper end to which the suction port of the suction hose 24 is connected. The support plate 25F is rotatably pivotally attached to the front surface of the machine body 1, and the upper portion of the support plate 25F is clamped between the adjusting bolt 26a and the compression spring 26b attached to the bracket 26 projecting from the front surface of the machine body 1, thereby making It is attached to 1 so as to be swingable.

FIG. 3 is a block diagram illustrating the electrical construction of the control device mounted on the carpet cleaning machine according to the present invention.
Memory unit 31 storing the CPU 30 and program memory
In addition to the display panel 1R and the speed detection sensor 6S described above, the interface circuit 32 connected between the operation switch 33 for starting and the detergent liquid pump 1
3 is connected to the drive motor 13M and the flow rate sensor 13S (both are integrally provided in the pump 13), and when the carpet cleaning machine has a self-propelled structure, the self-propelled motor 1
M (not shown in FIG. 1 and FIG. 2) is connected and each is controlled and operated according to a system program stored in the memory unit 31, and in particular, the pump 13 is a carpet washing machine. The number of revolutions is controlled to be fast when the speed is fast and slow when the speed is slow so that the supply amount of the detergent solution S is automatically adjusted.

That is, the supply amount of the detergent liquid S by the pump 13 is determined by the program stored in the memory unit 31 in accordance with the traveling speed according to the following procedure. Speed sensor 6S that detects the rotation of the sensor wheel 6
The number of rotations / minute of the sensor wheel 6 is detected according to the detection signal sent from the sensor wheel 6. Next, the speed / minute of the carpet washing machine is calculated from the outer diameter of the sensor wheel 6 and its rotation speed. Then, the cleaning area (S / min) is calculated from the width dimension (cleaning width) of the cleaning brushes 10 and 11 and the speed / minute.
(Washing width × speed / min) Further, the required amount of detergent (Vg / min) is calculated from the washing area (S / min) and the preset amount of required detergent per square. (S × required amount per square) Next, from the required detergent amount (Vg / min) and the detergent supply amount v per one rotation of the pump 13, the rotation speed / min of the pump 13 is calculated. (V ÷ v) Finally, the rotation speed of the pump 13 is adjusted to the rotation speed / minute calculated by controlling the drive motor 13M.

Therefore, when the traveling speed of the carpet washing machine is high, the required amount of detergent (Vg / min) increases and the rotation speed / min of the pump 13 also increases, so that the supply amount of the detergent liquid S by the pump 13 increases. On the contrary, when the traveling speed of the carpet cleaning machine is slow, the required amount of detergent (Vg / min) decreases and the rotation speed of the pump 13 drops, so the supply amount of the detergent solution S by the pump 13 decreases. be able to.

Since the present invention has the configuration as described above,
After turning on the operation switch 33, the handle 1a is pulled by hand to rotate the wheel 5 and the cleaning brushes 10 and 11 as shown in FIG.
When the vehicle is driven to the right in the above, the detergent solution S is sent into the foam generator 15 by the pump 13, and the exhaust air of the blower 20 is supplied to the foam generator 15 to apply pressure, S is two porous bodies 1 with different meshes
Discharge holes 1 of the pipe 16 are compressed and foamed in the 5S and 15T, and are rectified to form fine-grained foam.
6a ... is sequentially dropped onto the carpet surface, which is then washed with a brush 1.
It can be washed by brushing with 0, 11.

Further, the exhaust air from the blower 20 is blown out at the outlet 21c.
Since it is sprayed on the carpet surface after brushing more, it is possible to accelerate the drying time of the carpet surface wet with foam,
Further, since the suction force of the blower 20 reaches the nozzle 25 through the pipe 22 and the hose 24, the dirty water (dirty foam) after cleaning can be sucked from the carpet surface and collected in the dirty water tank 3.

Further, in the present invention, the rotation speed of the pump 13 is automatically adjusted according to the traveling speed of the carpet washing machine, and when the speed is high, the supply amount of the detergent solution S is increased to increase the amount of foam and the speed is increased. If it is late, the amount of foam is reduced to reduce the amount of foam, so that the carpet can always be washed in an optimum state.

In determining the amount of the detergent liquid S, the preset amount of detergent required per square is determined by experiments and empirical rules such that the detergent weight is 25% by weight of the hair portion of the carpet. Is proved to be optimal, and since the hair portion of the carpet is approximately 10% by weight of the whole, the total weight of the carpet / 1 square × 10% weight ratio × 0.25 = per square The required amount of detergent, calculated by.

[0033]

As described above, according to the carpet cleaning machine and the method for controlling the supply of the detergent liquid in the carpet cleaning machine according to the present invention, the foam having fine wood grain and suitable for cleaning is supplied to the carpet surface. While brushing, and then blowing the exhaust air of a blower to the brushed carpet surface to collect the dirty foam through the nozzle to the dirty water tank, it is possible to exert excellent cleaning effect and drying effect, and at the same time, the carpet Since the amount of foam supply can be adjusted according to the running speed of the washing machine, even if the running speed varies depending on the operator's guide, it is possible to always perform the optimum cleaning with the optimum amount of foam. The effect is extremely high.

[Brief description of drawings]

FIG. 1 is a partial sectional side view showing a configuration of a carpet cleaning machine according to the present invention.

FIG. 2 is a partially sectional front view of the carpet cleaning machine according to the present invention.

FIG. 3 is a block diagram illustrating an electrical configuration of a control device used in the present invention.

FIG. 4 is a perspective view of a foam generator.

[Explanation of symbols]

 1 Aircraft 2 Detergent liquid tank 3 Soil water tank 5 Running wheel 6 Sensor wheel 7S Spring 6S Speed sensor 10, 11 Cleaning brush 13 Pump 15 Foam generator 15b Main pipe 15S, 15T Porous body 16 Discharge pipe 16a Discharge hole 20 Blower 21c Air outlet 25 Nozzle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuichi Terada 8123, Kiga, Hosoe-cho, Inasa-gun, Shizuoka Prefecture Amano Co., Ltd. Hosoe Works

Claims (4)

[Claims] 1. A structure in which foam of detergent liquid is supplied to the surface of a carpet by a pump pressure while running and brushed with a cleaning brush, and the dirty water after brushing is sucked into a dirty water tank through a nozzle. In a carpet cleaning machine, the exhaust of the blower that exerts a suction action on the nozzle through the dirty water tank is supplied as pressurized air through a duct to the foam generator that foams the detergent liquid and supplies it to the carpet surface. Is supplied to the air outlet provided between the cleaning brush and the nozzle as a drying air through a duct. 2. A foam generator for supplying foam of detergent liquid to a carpet surface, a main pipe to which a detergent liquid supply pipe and a blower exhaust gas supply pipe are connected, and a discharge which is horizontally connected to a lower end of the main pipe. It is characterized in that it is constituted by a pipe, two kinds of porous bodies having different ventilation rates are fitted in series inside the main pipe, and a bubble discharge hole is formed on the bottom surface of the discharge pipe. The carpet cleaning machine according to claim 1. 3. A speed sensor configured to detect a traveling speed by constantly pressing a sensor wheel attached to the middle of the left and right traveling wheels against the surface of the carpet by the force of a spring. The carpet cleaning machine according to claim 1. 4. The carpet washing machine according to claim 1, wherein the washing area is calculated from the running speed of the carpet washing machine detected by the speed sensor and the width of the washing brush, and the washing area and the detergent per square The total amount of detergent liquid used is calculated from the required amount of liquid, and the pump rotation speed is calculated from this total usage amount and the discharge amount per rotation of the pump, and the pump is rotated at this calculated rotation speed. A method for controlling the supply of detergent liquid in a carpet washing machine, characterized in that the detergent liquid is supplied to a foam generator by means of the above.