JP2002238820A - Squeegee for floor face washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a squeegee for a floor face washer devised not to leave narrow unsucked line marks on the floor face even if filamentous dust clings to a squeegee while improving a dirty water recovery rate by spreading the suction effect of a blower over the whole squeegee to improve suction performance. SOLUTION: The center part of a squeegee frame 20T fitted with squeegee blades 21, 22 at the front and rear is provided with an air hole 20Z allowing a suction pipe 8B connecting a recovery hose 8 to communicate with a squeegee space 20R between both blades 21, 22. A bottom plate 25 with a communicating passage 27 opened, is fitted to the air hole 20Z, and it is so constituted that the squeegee blades 21, 22 come in face contact with a floor face F during suction operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a floor cleaning machine for cleaning a floor by spraying a cleaning liquid and rotating a cleaning brush or pad while moving a vehicle body. The present invention relates to a squeegee for a floor cleaning machine which collects cleaning waste water generated after cleaning by rotation of a cleaning brush or a pad by suctioning the cleaning waste water from a floor surface by a suction action of a blower.

[0002]

2. Description of the Related Art Conventionally, squeegees for floor cleaning machines have been disclosed, for example, in Japanese Unexamined Utility Model Publication No. 63-18966 and Japanese Unexamined Patent Publication No. 9-299303. Within the interval between the blades, a type is used in which the cleaning sewage is sucked and recovered from the floor surface by exerting a suction action of a blower.

[0003]

However, in the above-mentioned conventional squeegees, a suction pipe 30 for connecting a suction hose on the blower side is provided at the center of a squeegee frame 31 as shown in FIG. 31X between the front and rear squeegee blades 32, 33 attached to both sides of the
In the squeegee, a strong suction action can be exerted on the central part of the squeegee because the suction action is provided through the ventilation hole 30A. A sufficient suction effect cannot be exerted, and as a result, there is a problem that the recovery rate of the sewage is insufficient and the sewage is left unsucked on the floor surface. Incidentally, the average squeegee recovery rate of the above-mentioned conventional squeegee is about 91.1%. According to an experiment, for example, when a washing liquid of 20 liters is sprayed, the recovery amount is about 18.22 liters.
It has been found that a considerable amount of cleaning liquid remains on the floor.

[0004] Further, when there is slender thread-like dust such as hair on the floor, the floor F is washed with a floor washer and squeegee is sucked with a squeegee. While the suction performance is reduced due to the entanglement of the fibers 32 and 33, there is a problem that a fine streak-like trace of suction remains on the floor surface F due to the entangled thread-like dust, thereby contaminating the finish.

Therefore, the technical problem of the present invention is to improve the suction performance by distributing the suction function of the blower to the entire squeegee, thereby improving the recovery rate of the squeegee wastewater and preventing the squeegee from becoming entangled with thread-like debris. Another object of the present invention is to provide a squeegee for a floor washer that is devised so that a thin streaky suction mark is not left on the floor.

[0006]

Means for Solving the Problems (1) In order to solve the above-mentioned technical problem, according to the present invention, two sheets of a squeegee frame formed in a horizontal direction are spaced apart in front of and behind a horizontally long squeegee frame. The flexible squeegee blades are mounted on the squeegee blades, and the cleaning squeegee blades in front and behind the flexible squeegee blades are suctioned by a blower so that the cleaning sewage generated by the cleaning rotation of the cleaning brush or the pad is suctioned from the floor surface. A squeegee for a floor cleaning machine configured as described above, wherein a central portion of the squeegee blade has a ventilation hole that can exert the suction action of the blower through the suction pipe provided on the upper surface of the squeegee blade and within the squeegee interval. A small cross-sectional area that is open, partitions the suction tube side and the squeegee interval side into the vent hole, and partially communicates both sides. The bottom plate having the communication passage opened is attached.

As a result, sewage on the floor surface is first sucked onto the bottom plate through the communication passage by the suction action of the blower which has reached the space between the front and rear squeegee blades through the communication passage of the bottom plate. Then, since this sewage can be sent from the suction pipe to the blower side through a flexible hose or the like, a conventional squeegee that sucks the sewage on the floor surface directly to the blower side through the suction pipe and the flexible hose from within the squeegee blade interval. In comparison, it is possible to increase the suction efficiency and improve the recovery rate of wastewater.

(2) According to the present invention, the communication passage opened to the bottom plate is provided on the rear side with respect to the traveling direction of the squeegee.

According to the means described in the above (2), as the squeegee advances, the sewage sucked up into the space between the squeegee blades from the floor gradually moves along the inner surface of the rear squeegee blade to the center of the squeegee blade. Since it is sucked near the portion and finally sucked into the communication path opened to the rear side of the bottom plate, a high suction action is exhibited, and the recovery rate of wastewater can be increased.

(3) In the present invention, when the suction action of the blower is exerted within the squeegee interval, the lower ends of the front and rear squeegee blades are bent by the vacuum action generated within the squeegee interval. Then, the bent side surface is configured to be in surface contact with the floor surface.

(4) Further, according to the present invention, the width at which the lower end sides of the front and rear squeegee blades are bent and come into surface contact with the floor surface is configured to be 3 to 7 mm.

According to the means described in the above (3) and (4), the lower side of the squeegee blade is compared with a conventional squeegee that sucks wastewater by line contact of the edge of the squeegee blade with the floor surface. Due to the surface contact with the floor surface with a width of 3 to 7 mm and suction, even if slender trash such as hair is caught between the floor surface and the squeegee blade, suction leakage hardly occurs, and in a stringing state. It is unlikely that unsucked sewage remains on the floor. In addition, since the squeegee blade is in surface contact with the floor due to the balance between its own weight and the suction force, the suction force can always be maintained in the same state, and the squeegee blade is hardly worn due to the surface contact. Therefore, it is possible to prevent a decrease in suction performance due to use.

(5) In the present invention, the cross-sectional area of the squeegee interval located below the bottom plate when the suction action of the blower is applied within the squeegee interval is (C). ), The cross-sectional area of the communication passage of the bottom plate is (B), and the cross-sectional area of the suction tube is (A), so that the relationship between the cross-sectional areas is C <B <A. I have.

(6) In the present invention, as described in claim 6, the relationship among the cross-sectional areas A, B, and C is such that B =
The configuration is such that 0.1A to 0.3A and C = 0.05A to 0.2A.

According to the means described in the above (5) and (6), the sectional area of the suction path in the squeegee can be expressed as C <B <
The relationship of A, that is, the configuration is such that it gradually decreases as it goes forward, so that the wastewater can be reliably sucked from the floor surface with a strong force, and the sucked wastewater is smoothly sent out to the blower. Make it possible.

(7) In the present invention, among the front and rear squeegee blades attached to the squeegee frame, a large number of squeegee blades are provided at the lower end edge of the squeegee blade on the front side with respect to the traveling direction of the squeegee. While the notch grooves are provided at intervals, the intervals between these notch grooves are configured to become narrower toward both ends of the squeegee.

The suction force inside the squeegee by the blower is
It becomes weaker as it advances in the direction from the center to both ends of the squeegee, that is, in the direction away from the center. The squeegee is designed to be narrower toward the tip, increasing the amount of sewage sucked into the squeegee (the amount of external air), so that it can exhibit a substantially uniform suction force over the entire length of the squeegee. To

(8) Further, according to the present invention, the entire squeegee is formed in a substantially arcuate shape having both ends curved in the traveling direction of the squeegee. The interval is configured to be narrower toward both ends than the center.

According to the means described in the above (8), the entire squeegee is curved substantially in an arc shape, so that the squeegee collects and collects the contaminated water on the floor inside without proceeding to the outside as the squeegee advances. To achieve excellent suction performance, and narrow the relationship between the front and rear squeegee blades from the center to the tip to increase the suction force on the tip, so that the tip to the center It is possible to maintain the suction power of incoming sewage.

As described above, the technical problems described above can be solved by means of the above (1) to (8), and the problems of the conventional technology can be solved.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the squeegee for a floor cleaning machine according to the present invention will be described below with reference to the drawings. FIG. 1 illustrates an entire floor cleaning machine using a squeegee of the present invention. FIG. 2 is a plan sectional view of FIG.
In these drawings, the reference numeral 1 generally designates a vehicle body of a floor-cleaning machine, which is entirely composed of an upper half lid 1Y,
The lid portion 1Y is constituted by a lower half body portion 1X which can be freely opened and closed or detachably mounted by using a connection fitting (not shown) such as a hinge.

The lid portion 1Y is substantially entirely formed of a hollow sewage tank 10 using a synthetic resin material or the like.
An opening / closing lid 10A is provided on the upper surface, and a suction blower 7 operated by a DC motor 7M is mounted inside a compartment recessed at the center of the inner bottom, and the suction action of the suction blower 7 is performed. From the inside of the sewage tank 10 to the squeegee 20 according to the present invention provided at the rear of the machine body 1 through the recovery hose 8 (flexible hose), the sewage DW remaining on the floor surface due to the rotary cleaning of the cleaning brush (pad) described later. Is sucked and collected from the collection hose 8 into the sewage tank 10 through the distal end port 8A.

The vehicle body 1X is generally made of a synthetic resin material or the like, and is formed in a substantially box shape having an open top surface and one end surface (right end surface in the drawing), and a left end surface (right end surface). Both the front side), the left and right side walls, and the bottom plate are formed of hollow cleaning liquid tanks 9A and 9B for the cleaning liquid CW that communicate with each other, and the upper and right end surfaces are opened. The internal space of 1X is an installation space for a battery 6 for power supply and a motor 4M for rotating the cleaning brush 5.

The motor 4M is fixed to the bottom plate in the vehicle body 1X on which the brush motor 4M is mounted by using a motor base, and the rotating shaft 4X protrudes below the motor 4M via a speed reducer. A cleaning brush 5 (pad) is mounted on a mounting plate 4 provided on the rotating shaft 4X to rotate at high speed.
A cleaning liquid CW is supplied to the cleaning brush 5 from the cleaning liquid tanks 9A and 9B by a pump (not shown) to clean the floor.

Further, in the figure, reference numerals 2 and 3 denote traveling wheels mounted on the bottom of the vehicle body portion 1X. Of these wheels, particularly the rear wheels 2 constitute driving wheels which are rotated by a motor (not shown). I have. 1T is a driving handle, 1P is an operation panel provided at the rear of the vehicle body 1, and 11 is a sewage tank 1.
Hose for draining sewage water connected to the water supply port 9Y, a water supply port for supplying the cleaning liquid tank 9A, 9B with the cleaning liquid CW opened at the front portion of the lid portion, an opening / closing lid 9X covering the water supply port 9Y, and an opening lid 8B A suction pipe of the squeegee 20 for connecting a lower end of the collection hose 8, a squeegee lever 12 for turning on / off the suction blower motor 7M provided at a rear portion of the vehicle body 1 and for raising and lowering the squeegee 20, and a brush ground 13 The pressure adjusting lever 20 ′ is a connecting plate for connecting the squeegee 20 to the rear part of the vehicle body 1.

FIG. 3 is a front view illustrating the structure of the squeegee 20 according to the present invention, and FIG.
(B) The figure is a bottom view.
The nozzle 20T is provided on the lower side of the suction pipe 8B, and the left and right ends are curved in the traveling direction of the squeegee 20 so that the shape in a plan view is substantially as shown in FIGS. 2 and 4. A squeegee frame formed in a bow shape is provided with a nozzle 8C of the suction pipe 8B in a portion of an upper mounting base 20X of a ventilation hole 20Z provided in a central portion of the squeegee frame 20T.
Is fixed to the central portion of the squeegee frame 20T by connecting the flange 8T to the central portion of the squeegee frame 20T with the ventilation hole 20Z.

The squeegee frame 20 and 21 are
The front and rear squeegee blades, which are attached to the inside and outside (front and rear sides with respect to the traveling direction) of the T with mounting screws 24 at intervals in front and rear, respectively, are squeegees 20. Guide rollers attached to both ends of the
In FIG. 6, 21R and 22R are both squeegee blades 2.
When attaching the first and second squeegee frames 20T to both side surfaces of the squeegee frame 20T, reference numerals 20R denote the front and rear squeegee blades 2R in FIGS.
The squeegee interval constituted by the suction blower 7 and the squeegee interval 20R through the collection hose 8, the suction pipe 8B, the nozzle 8C, and the vent hole 20Z. It is configured.

The squeegee frame 20T described above is
As is clear from the description of FIG. 4, the width of the central portion in which the ventilation hole 20Z is formed is configured to be the widest, and the width is gradually narrowed toward the left and right end sides. As a result, the squeegee described above is formed. Since the interval 20R is configured such that the central portion is the widest and gradually narrows toward the left and right distal sides, a strong suction force is exerted on the distal portion side, and suction of sewage from the distal portion toward the central portion is performed. It is designed to maintain power.

FIGS. 7A and 7B are front views illustrating the structure of the rear squeegee blade 22 and the front squeegee blade 21 described above. .., 21X... Are provided, and both squeegee blades 21 and 22 include:
For example, if a rubber material having a hardness of 40 ° (± 5) is used and the lower end sides 21S and 22S of both blades are in contact with the floor surface F, the suction function of the suction blower 7 is applied to the squeegee interval 20R. The lower ends 21S and 22S of the squeegee blades 21 and 22 are bent as shown in FIG. 7C and FIG. 10 and are surface-bonded to the floor surface. It is constructed so that it is pulled forward by the surface washer and moves forward in the left direction in each figure. In FIG. 7 (c), each lower end 21S, 2 indicated by the symbol L
The surface contact width of the 2S is 3 to 7 mm, so that even if slender thread-like dust such as hair is entangled with the squeegee blades 21 and 22, sewage remaining in the stringing state is not left on the floor surface. Make up.

Of the front and rear squeegee blades, the lower end 21S of the front squeegee blade 21 has
As shown in FIG. 7 (b), a number of notched grooves 21A for taking in sewage are arranged and formed in large numbers, and the interval between adjacent notched grooves 21A is widened in the central portion side as shown in FIG. By forming the left and right tip sides narrow, it is configured such that a substantially uniform suction force can be exerted over the entire length of the squeegee.

FIG. 5 is an enlarged bottom view of the central portion of the squeegee 20, and FIG. 6A is a partially broken front view of the central portion of the squeegee 20 before the suction blower 7 starts operating. (B) is a partially cutaway front view of the central portion of the squeegee 20 in a state where the suction blower 7 is performing a suction operation. In these drawings, reference numeral 25 denotes ventilation of the squeegee frame 20T. A bottom plate fixed with mounting screws 26 ', 26' to the bottom surface of the central portion of the squeegee frame 20T so as to close the hole 20Z from the bottom surface side,
One side edge of the bottom plate 25, that is, the squeegee 20
A notch 25X is formed in the rear edge with respect to the traveling direction of the squeegee.
A communication passage 27 having a laterally elongated cross-sectional shape is formed to communicate between the two.

FIGS. 8 and 9 show the state of the squeegee blades 21 and 22 before and after the suction blower 7 is not operating, the suction pipe 8B, the communication passage 27, and the position below the bottom plate 25. The cross-sectional shape (details of the cross-sections AA, BB, and C) of the squeegee interval 20R is shown, and each cross-sectional area is AA = 992 mm 2, BB
= 185 mm 2 and C section detail = 311 mm 2, but these numerical values are of course only examples of implementation.

10 and 11 show a state in which the suction blower 7 performs a suction operation and the lower ends 21S and 22S of the front and rear squeegee blades 21 and 22 are bent by the suction force. AA cross section, BB cross section, and the shape of the C portion details are described.
The cross-sectional area of each part is AA = 992 mm 2, BB = 18
The C according to claim 5, wherein 5 mm 2 and C portion details = 87 mm 2.
The condition of <B <A, and B = 0.1 A or more according to claim 6.
The configuration satisfies the conditions of 0.3 A and C = 0.05 A to 0.2 A.

Therefore, during the suction operation of the suction blower 7, since the cross-sectional area of the suction path is gradually reduced as it goes ahead, the suction of the sewage DW from the floor F can be reliably performed with a strong force. In addition, the sucked sewage DW can be smoothly sent out to the suction blower 7 side, that is, the sewage tank 10 side through the collection hose 8.

In the present invention, as described above, the ventilation holes 20Z are used.
And a bottom plate 25 having an open communication passage 27 attached thereto, it is possible to increase the suction efficiency of the wastewater DW and improve the recovery rate thereof. For example, the conventional type shown in FIG. 12 and FIG. 91.1% squeegee recovery rate
However, the squeegee 20 of the present invention can improve this to about 96.84%.
For example, as a result of an experiment, it was found that when 20 l of the washing liquid was sprayed on the floor surface F, the recovered amount was about 19.37 l.

Incidentally, in the conventional squeegee shown in FIGS. 12 and 13, each cross-sectional area is AA = 1225 mm 2,
B = 873 mm 2, details of part C = 575 mm 2.

[0037]

As described above, according to the squeegee for a floor washer according to the present invention, it is possible to exhibit an excellent suction effect and at the same time to improve the recovery rate of sewage. Has the advantage of obtaining a strong sewage suction power with a suction blower, and cleanly removes sewage on the floor surface without leaving a thread-like suction mark even if hair-like thread-like dust is entangled. The quality of the floor cleaning by the floor cleaning machine can be further improved.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an example of a floor cleaning machine using a squeegee according to the present invention.

FIG. 2 is a plan sectional view of the floor cleaning machine shown in FIG. 1;

FIG. 3 is a front view of the squeegee according to the present invention.

FIG. 4A is a plan view of the squeegee shown in FIG. 3,
(B) The figure is a bottom view.

FIG. 5 is a bottom view of a squeegee showing an enlarged configuration of a main part of the present invention.

FIG. 6 (a) is a partially cutaway front view of a main part of the present invention,
(B) is a partially cutaway front view of a main part during a suction operation.

FIG. 7 (a) is a front view of a rear squeegee blade,
(B) is a front view of the front squeegee blade, and (c) is an explanatory view illustrating the bent state and the surface contact state of the lower end side of each squeegee blade.

FIG. 8 is a side sectional view of the squeegee according to the present invention.

9 (a) and 9 (b) are AA line and B line in FIG. 8, respectively.
FIG. 10 is a cross-sectional view taken along the line B, and FIG.

FIG. 10 is a side sectional view of the squeegee according to the present invention during a suction operation.

11A and 11B are cross-sectional views taken along lines AA and BB in FIG. 10, respectively, and FIG. 11C is a detailed view of a portion C in FIG.

FIG. 12 is a side sectional view of a conventional squeegee.

FIGS. 13A and 13B are cross-sectional views taken along lines AA and BB in FIG. 12, respectively, and FIG. 13C is a detailed view of a portion C in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Floor cleaning machine body 5 Cleaning brush or pad 7 Suction blower 8 Collection hose (flexible hose) 8B Suction pipe 10 Collection tank 20 Squeegee 20T Squeegee frame 20Z Vent hole 20R Squeegee interval 21,22 Squeegee blade 21A Notch groove 21S, 22S Lower end side of squeegee blade 25 Bottom plate 25X Notch 27 Communication passage F Floor surface

Claims (8)

[Claims] 1. A squeegee frame formed in a horizontal direction, two flexible squeegee blades are attached at an interval in front of and behind the squeegee frame. A squeegee for a floor cleaning machine configured to suction cleaning waste water generated by cleaning rotation of a cleaning brush or a pad from the floor, wherein a suction function of the blower is applied to a central portion of the squeegee blade. Open a ventilation hole that can be exerted into the squeegee interval through the suction tube provided on the upper surface, partition the suction tube side and the squeegee interval side in this ventilation hole portion, and partially on both sides. A squeegee for a floor washer, comprising a bottom plate having an open communication passage having a small cross-sectional area for communication. 2. The squeegee for a floor washer according to claim 1, wherein the communication path opened to the bottom plate is provided on the rear side with respect to the traveling direction of the squeegee. 3. When the suction action of the blower is exerted within the squeegee interval, the lower ends of the front and rear squeegee blades are bent by the vacuum action generated within the squeegee interval, and the bent side faces come into surface contact with the floor surface. The squeegee for a floor washer according to claim 1, wherein the squeegee is configured to perform the following. 4. The squeegee for a floor cleaning machine according to claim 3, wherein the width of the lower end side of the front and rear squeegee blades is bent to 3 to 7 mm so as to make surface contact with the floor. 5. The sectional area of the squeegee interval located below the bottom plate when the suction action of the blower is applied within the squeegee interval is defined as (C), and the sectional area of the communication passage of the bottom plate is defined as (B). And the cross-sectional area of the suction tube is (A)
5. The squeegee for a floor cleaning machine according to claim 1, wherein the relationship between the sectional areas is C <B <A. 6. The relation among the cross-sectional areas A, B, and C is expressed as B =
6. The squeegee for a floor washer according to claim 5, wherein 0.1A to 0.3A and C = 0.05A to 0.2A. 7. A plurality of notched grooves are provided at intervals at a lower end edge of a squeegee blade on the front side of a squeegee advancing direction among front and rear squeegee blades attached to a squeegee frame. 7. The squeegee for a floor washer according to claim 1, wherein the width of the squeegee is reduced toward both ends of the squeegee. 8. The entire squeegee is formed in a substantially arcuate shape in which both ends are curved in the traveling direction of the squeegee, and the distance between the front and rear squeegee blades becomes narrower toward the both ends from the center. The squeegee for a floor washer according to claim 1, wherein the squeegee is configured.