JP2008228855A - Double squeegee type floor surface washer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double squeegee type floor surface washer contrived to automatically switch a valve action surely in both forward and backward movements and surely suck washing sewage after washing from a floor surface while simplifying the entire configuration and suppressing the number of components to be small. <P>SOLUTION: In the double squeegee type floor surface washer 1 provided with squeegees 10A and 10B for sewage suction on the front and back of a rotary brush 7, the width of suction ports 23B and 24B exerting a sucking action to the front and back squeegees 10A and 10B is configured to be sufficiently short relative to the length of flexible blades 20A, 21A, 20B and 21B constituting the squeegees 10A and 10B. Also, the entire squeegee unit 10 wherein the front and back squeegees 10A and 10B are integrally provided is configured vertically movably relative to a machine body 1T. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention belongs to the technical field of a floor cleaning machine (scrubber) that cleans a floor surface with a brush that rotates or reciprocates while traveling. Specifically, a suction squeegee for sewage is placed before and after the brush. The present invention relates to a double squeegee type floor washer.

A double squeegee type floor cleaning machine provided with a sewage suction squeegee before and after a rotating or reciprocating brush for cleaning the floor is already disclosed in, for example, Patent Document 1 or Patent Document 2 A flexible blade (solid blade) is formed by reversing and bending a flexible blade (rubber blade) provided on the front and rear squeegees according to the frictional resistance with the floor surface in accordance with the forward or backward movement of the floor cleaning machine. A mechanism that opens and closes between the blades to alternately switch suction and shut-off of the front and rear squeegees, and a switching valve interlocked internally by the frictional resistance between the flexible blades provided on the front and rear squeegees and the floor surface, A mechanism for alternately switching the vacuum path communicating with the front and rear squeegees has been proposed.
Japanese Patent Publication No. 7-61304 Japanese Patent No. 3338265

However, the conventional double squeegee type floor washer has various drawbacks as described below.
(1) In the “Scrubber” of Patent Document 1, the edge part over the entire width of the flexible blade (lip in the document) that collects sewage is used as a switching valve. When the permeable blade itself is overused, the elasticity such as flexibility and reversibility cannot be sufficiently maintained, and as a result, the valve function is deteriorated due to deterioration, and the switching between suction and shut-off occurs.
(2) In addition, when the dust is caught between the outer flexible blade (outer lip) and the inner flexible blade (inner lip), the valve function is stopped, and the stuck dust is the cause. Leaves streaks on the floor cleaned with
(3) Furthermore, this type of double squeegee type floor washer is often used mainly for cleaning and cleaning carpet and rug floors, and the cleaning water contains detergents and deodorizers, which are sewed. In some cases, the viscosity of the sewage may become slightly higher, and at that time, the contact portions of the flexible blades that have a valve function stick to each other and stick together. There was a problem that the permeable blade was dragged without being able to change its direction, resulting in damage to the device and the floor surface.

  On the other hand, in the “suction switching device in double squeegee type floor cleaning” of Patent Document 2, a dedicated switching valve is installed to open and close the switching valve in conjunction with the sliding movement of the slide plate. The equipment is complicated and has a large number of parts, and if dust accumulates in the internal switching valve mechanism due to long-term use, maintenance becomes necessary and easy maintenance-free floor cleaning. It was unsuitable for the machine.

  Therefore, the technical problem of the present invention is that the overall configuration is simple and the number of parts is reduced, and the valve action can be automatically switched in both forward and backward movements. It is to provide a double squeegee type floor washer that is devised so that suction can be performed.

(1) In order to solve the above technical problem, a double squeegee type floor surface cleaning machine according to claim 1 of the present invention is a rotating or reciprocating brush that cleans the floor surface while receiving the supply of cleaning water. Cover the outer periphery with a brush cover body, and provide a vacuum path on the outer periphery side of the brush cover body that leads to a vacuum source such as a blower, while vacuuming the cleaned sewage through the front suction port and the rear suction port leading to this vacuum path. A double squeegee type floor washer having front and rear suction ports provided in each of the front and rear squeegees for scooping up sewage. Are each composed of an outer flexible blade and an inner flexible blade, and the width of the front and rear suction ports is sufficiently shorter than the length of the flexible blade, and is located at a substantially central position of the flexible blade length. Only opening The flexible blade is frictionally engaged and contacted with the floor surface to bend in the direction opposite to the traveling direction at the time of the cleaning operation of the floor cleaning machine, and the outer flexible blade on the front side in the traveling direction. Of the front side or the rear side suction port, the suction port located on the front side in the traveling direction is shielded, and the rear side or the rear flexible blade is bent on the rear side in the traveling direction. The suction port on the side located on the rear side in the traveling direction among the front suction ports is set in an open state.

(2) Further, in the double squeegee type floor surface washer according to claim 2 of the present invention, the front and rear squeegees are respectively attached to the front and rear squeegee frames with the front and rear spaced apart from each other. The two flexible blades on the inner side and the two flexible blades are fitted between the two flexible blades so that the two front and rear flexible blades are maintained on the squeegee frame side while maintaining the above-mentioned distance. And a squeegee spacer to be fixed, and the shape of the bottom outer surface of the squeegee spacer is a curved surface similar to the natural bent shape of the outer flexible blade located on the front side in the traveling direction. Yes.

(3) Further, in the double squeegee type floor surface washer according to claim 3 of the present invention, the curved portion on the outer side of the bottom of each squeegee spacer in which the suction port leading to the vacuum path is formed in a substantially U-shaped cross section. It is characterized in that an opening is formed.

(4) Moreover, the double squeegee type floor cleaning machine according to claim 4 of the present invention constitutes a squeegee unit in which the front and rear squeegees are integrally connected to the squeegee frame, while the suction action from the vacuum source. And extending from the vacuum path to the front and rear suction ports through the leg-shaped ducts connected to the front and rear of the vacuum path and the squeegee spacers of the front and rear squeegees, respectively. The whole squeegee unit is attached to the body of the floor cleaning machine so as to be movable up and down.

(5) Further, in the double squeegee type floor surface washer according to claim 5 of the present invention, the entire squeegee unit movable up and down is due to other elastic means in addition to its own weight, or the own weight of the squeegee unit. It is characterized by being configured to be pressed in the floor direction only.

  According to the means according to claim 1 described in the above (1), when the floor washing machine is operated forward and backward, only the suction port on the squeegee side located on the front side in the advancing direction is shielded so Since only the suction force from the squeegee side on the rear side in the direction acts on the sewage suction, the sewage can be reliably recovered without losing the power of the vacuum source necessary for the suction. Furthermore, since the shielding of the suction port on the front side in the traveling direction acts only on the suction port having a sufficiently short width with respect to the width of the flexible blade, it is easy to release the shielding part when the direction is changed. There is no problem of sticking with cleaning sewage whose viscosity is increased by mixing with filth, and the shielding by the flexible blade is not released.

  Further, according to the means according to claims 2 and 3 described in the above (2) and (3), the outer flexible blade located on the front side in the advancing direction blocks the suction port while bending into a natural bent shape. For this reason, there is no local deformation of the flexible blade, the life of the flexible blade made of a rubber material or the like lasts long, and the suction port can be shielded and released reliably.

  Further, according to the means according to claim 4 described in the above (4), during the cleaning operation of the floor cleaning machine, the squeegee unit can collect the sewage by the front and rear squeegees while following the floor surface. Therefore, even if it is a flexible blade that has a uniform contact degree between the floor and the squeegee, has stable sewage recovery performance, and has changed its tendency to harden over a long period of use, it is the same as a new squeegee. Since the operation and suction port shielding operation can be performed, stable operation is always possible.

  Furthermore, according to the means according to claim 5 described in the above (5), the operation of the above (4) can be performed reliably, and can be temporarily performed when switching the forward and backward operation of the floor cleaning machine. When the bending direction of the flexible blade changes, the high load on the flexible blade is released elastically, and the squeegee unit moves up and down while the local deformation of the flexible blade is suppressed to complete the bending direction change. Therefore, it is possible to reduce the early deterioration of the flexible blade and the operation load and shock at the time of changing direction, it is easy to use for the operator, and the durability can be improved without causing excessive deformation for the flexible blade. it can.

  As described above, according to the double squeegee type floor surface washing machine according to the present invention, it is a circulation type in which the sewage after washing is filtered and reused. It is possible to provide a double squeegee type floor washer having a suction switching function that is high, has a simple component structure, is inexpensive, and has a small operation load for the operator.

  Hereinafter, an embodiment of a double squeegee type floor cleaning machine according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an example of a double squeegee type floor cleaning machine according to the present invention. The double squeegee type floor cleaning machine generally indicated by reference numeral 1 (hereinafter simply referred to as the floor cleaning machine 1) includes an airframe 1T, an upper surface cover body 1A covering the upper surface of the airframe 1T, and a traveling wheel 2 Washing water configured to be detachable from the rear part of the machine body 1T by a blower 3 as a vacuum source provided inside the upper surface cover body 1A, a blower motor 3M, and a fastener 4A such as a mounting fastener, for example. A tank 4, an operation handle 6 including an operation unit 5, and a brush case body 1B attached to the front of the machine body 1T are provided. Abstract Double squeegee device (squeegee unit) is provided there.

  Further, in FIG. 1, reference numeral 7 denotes a cleaning rotary brush attached to the inside of the brush case body 1B, 7M denotes a brush motor for rotating the rotary brush 7, and the outer peripheral surface of the rotary brush 7 excluding the bottom surface has a full length. Is covered with a brush cover body 7S (see FIG. 4) whose bottom surface is opened. Reference numeral 8 denotes a vacuum passage provided on the outer side (outer peripheral portion) of the substantially intermediate portion so as to straddle the brush cover body 7S covering the rotary brush 7, and the front side continuously provided before and after the vacuum passage 8 and Front and rear suction ports 8 </ b> X and 8 </ b> Y opened at the lower ends of the rear duct-like leg portions 8 </ b> A and 8 </ b> B are opened at the front and rear portions of the rotating brush 7.

  The vacuum path 8 is connected to the intake / water intake port 4C of the cleaning water tank 4 through a sewage recovery duct 8H, and the blower 3 is connected to the exhaust port 4B of the cleaning water tank 4 through an exhaust duct 3K. When the blower 3 is connected by communication and the blower 3 is sucked by the motor 3M, the suction action passes through the exhaust duct 3K → the washing water tank 4 → the sewage recovery duct 8H to the vacuum path 8, and further, each suction before and after that This occurs on the floor surface FL around the front rotary brush 7 (see FIG. 4) when the floor cleaning machine 1 is operated, reaching the ports 8X and 8Y (final suction ports 23B and 24B described below). The sewage after brush cleaning is sucked and collected (circulated) into the cleaning water tank 4, and the exhaust after suction is discharged from the exhaust cylinder 3Z of the blower 3 to the outside air through the exhaust duct 3K. That. In the figure, a line IN indicated by a thick solid line is a recovery route for washing sewage, and a line OUT indicated by a thick two-dot chain line indicates an exhaust route for the blower 3.

  Further, in the drawing, reference numeral 9P indicates that the cleaning water absorbed from the cleaning water tank 4 by the water absorbing action of the pump 9 is sent to the nozzle 9N (see FIG. 4) provided on the ceiling surface of the brush cover body 7S, and the rotating brush 7 A cleaning water supply pipe for supplying water to the cleaning water, and the cleaned sewage collected and sucked into the cleaning water tank 4 through the sewage recovery duct 8H is filtered by a filtration device (not shown) provided inside the cleaning water tank 4. Therefore, it is structured to be reused as cleaning water.

  Further, in FIG. 1, the reference numeral 10 generally indicates a double squeegee type squeegee unit provided on the bottom surface of the opened brush cover body 7S. The squeegee unit 10 has front and rear opening edges. The front squeegee 10A and the rear squeegee 10B are provided. Further, 10C and 10C are side guards provided on both sides of the front and rear squeegees 10A and 10B. The rotary brush 7 has the front and rear and both sides on the front and rear squeegees 10A and 10B and the side guard 10C, respectively. The bottom surface FL is cleaned by rotating at the bottom opening portion of the brush case body 1B surrounded by 10C.

  FIG. 2 is a perspective view of the squeegee unit 10 with the squeegee unit 10 removed as viewed from the bottom side of the floor cleaning machine 1, wherein 11 and 11 are the outer side surfaces of the side guards 10C and 10C of the squeegee unit 10. The left and right mounting plates 11A and 11A, which are respectively mounted, are long holes for mounting provided at the upper ends of the left and right mounting plates 11 and 11, and these long holes 11A and 11A are provided on both the left and right sides of the floor cleaning machine 1. Specifically, it is mounted on the mounting shafts 12 (one of which is omitted) protruding from the left and right side surfaces of the airframe 1T so as to be vertically movable, and the upper surface of the four corners of the squeegee unit 10 and the bottom surface of the airframe 1T. By interposing a plurality of springs 13 that urge the squeegee unit 10 downward between 1Z and the squeegee unit 10, the entire squeegee unit 10 has a floor surface FL (see FIG. 4) by its own weight and the elastic action of the springs 13. Elastically And it is configured to press.

  In FIG. 2, 1H is an opening for the rotating brush 7 formed on the bottom surface 1Z of the airframe 1T, 2F is a front wheel for traveling attached to the bottom surface 1Z, and 14 is a latch attached to the lower end of the operation handle 6. A plate 15 is a mounting shaft in which the operation handle 6 is rotatably mounted in the forward and backward directions of the floor cleaning machine 1 by attaching the locking plate 14 to the side surface of the upper surface cover body 1A. The engaging handle 17 is engaged with the floor cleaning machine 1 by engaging the locking pin 17 with one of a plurality of engaging grooves formed in the outer peripheral edge of the locking plate 14 by the elastic force of the spring. Can be fixed at an arbitrary angle. When an operator or the like steps on the pedal release plate 16, the engagement of the engagement plate 14 by the engagement pin 17 is released. , Mechanism that can freely rotate the operating handle 6 back and forth It has become.

  The operation handle 6 configured as described above is refracted freely in the front-rear direction with respect to the machine body 1T of the floor cleaning machine 1 to make it easy to operate, and as shown in FIG. In this state, the storage area area when not in use is reduced, and although not shown, the operation handle 6 is moved forward with respect to the airframe 1T, the washing water tank 4 is removed, and the floor surface is washed in that state. It is devised so that the storage space can be reduced by standing the entire machine 1 vertically.

Next, the configuration of the squeegee unit 10 described above will be described in detail with reference to the drawings. (1) in FIG. 3 is a perspective view showing the whole, and (2) is an exploded perspective view. Overall, an opening 10H is formed in the center by connecting and fixing two left and right ends of two main frames 10X and 10Y in parallel with two horizontal frames 10E and 10E. In the provided squeegee frame assembled into a substantially quadrilateral shape, the cross-sectional shapes of the front and rear main frames 10X and 10Y are each formed in a substantially U-shape downward. The upper ends of the outer and inner flexible blades 20A, 21A and 20B, 21B made of a rubber material or the like are spaced forward and backward with respect to the opened interiors of the main frames 10X and 10Y. And squeegee spacers 23 and 24 as shown in FIGS. 2 and 4 and screwed to each of the flexible blades 20A. , 21A and 20B, 21B are fixed to each of the main frames 10X, 10Y with their upper ends fixed, and the front and rear squeegees 10A, 10B are integrated in the front and rear. The double squeegee type squeegee unit 10 is assembled.

  As described above, the squeegee unit 10 configured as described above uses the side plates 11 and 11 attached to the left and right horizontal frames 10E and 10E so that the bottom side of the rotary brush 7 faces the opening 10H from above. In this state, it is attached to the machine body 1T so as to be movable up and down, and for this attachment, a suction port 8X having a substantially cylindrical cross section opened at the front ends of the duct-like leg portions 8A and 8B before and after the vacuum path 8. 4Y through insertion holes 10N and 10N provided in the main frames 10X and 10Y as shown in FIGS. 4 to 6, fitting holes 23A and 24A (opening in the center of the upper surface of the squeegee spacers 23 and 24, respectively. 3 (2)), it is slidably inserted into the internal cavities 23T and 24T (see FIG. 4), and openings are formed on the outer wall surfaces of these internal cavities 23T and 24T. That inlet 23B, relative to 24B, and is configured to exert a suction effect of the blower 3.

  The bottom shape of the squeegee spacers 23 and 24 is such that the outer flexible blades 20A and 20B positioned on the front side in the direction of travel (forward and backward) of the floor cleaning machine 1 are naturally bent as shown in FIG. It is formed in a curved surface having a substantially U-shaped cross section similar to the shape, and the length (lateral width) of each curved surface is sufficiently short with respect to the flexible blades 20A and 20B. The suction ports 23B and 24B described above are formed at substantially the center positions of the flexible blades 20A and 20B, and are configured to exert a suction action on the front and rear squeegees 10A and 10B. Yes.

  FIG. 4 is a side sectional view for explaining the operation of the double squeegee type squeegee unit 10. FIG. 4 (1) shows a state when the floor cleaning machine 1 is moving forward, and FIG. The state at the time of conversion is shown, and FIG. 3 (3) shows the state at the time of reverse movement, and at the time of forward movement and reverse movement, as shown in (1) and (3) of FIG. Due to the elastic force of the squeegee unit 10, the gap KZ is always maintained between the upper surface of the squeegee unit 10 and the bottom surface 1Z of the airframe 1T, and the flexible blades 20A, 21A and 20B, 21B of the squeegees 10A and 10B are placed on the floor surface. A cushioning action that elastically contacts the FL is exhibited. Further, at the time of turning in the front-rear direction, as shown in FIG. 4 (2), the entire squeegee unit 10 is raised by the gap KZ with respect to the floor surface FL due to the stress that each squeegee 10A, 10B receives from the floor surface FL. Thus, local deformation of each flexible blade 20A to 21B is prevented.

  Therefore, when the floor cleaning machine 1 is moved forward as shown in FIG. 4 (1) or moved backward as shown in FIG. 4 (3), the respective outer flexible blades 20A or 20B on the front side are brought into the suction ports 23B or 24B. As shown in FIG. 2, the suction ports 23B, 24B are sufficiently shorter than the width (length) of the flexible blades 20A, 20B, and the suction of the duct-like legs 8A, 8B Only the width (length) of the mouths 8X and 8Y is sufficient, and if the suction ports 23B and 24B are of that extent, the flexible blades 20A and 20B and the suction ports 23B and 24B Even if the suction ports 23B and 24B are stuck (the suction force by the suction action of the blower 3 is also acting), the stress generated in the flexible blades 20A and 20B other than the stuck part , Paste above It can be easily released.

  FIG. 5 is an enlarged sectional view further clarifying the operation of the front and rear squeegees 10A and 10B shown in FIG. 4 (only the front side squeegee 10A is shown in the drawing for convenience), (1) Indicates a state during forward movement, (2) during reverse, and (3) during reverse travel. Further, FIG. 6 illustrates a configuration of an embodiment in which the front and rear squeegees 10A and 10B, that is, the squeegee frame 10W are not movable up and down, for comparison with the present invention shown in FIG. ) Shows a state during forward movement, (2) shows a state during reverse rotation, and (3) shows a state during backward movement.

  As described above, the local bending of the flexible blade 20A as shown in FIG. 6 (2) is known to remarkably deteriorate the physical properties of the rubber by repeatedly acting. If the maximum elongation is not limited to about 30%, the physical properties (elasticity) are significantly deteriorated. In the state shown in FIG. 6 (2), the local elongation is well over 30%. Therefore, the surface of the rubber tends to harden due to deterioration of the durability of the rubber, and cracks are likely to occur. is there.

  Therefore, as shown in FIG. 5 (2), when the direction is changed, if the elasticity of the rubber is stronger, the squeegee frame 10W side moves upward to avoid local deformation of the rubber constituting the flexible blades 20A and 20B. Is a very effective means.

  Furthermore, since the pressure of the squeegee unit 10 and the negative pressure due to the suction action and, in some cases, the pressing force of the squeegee frame 10W are limited by the spring force, the squeegee frame 10W moves up and down at the time of direction change, and the outside (front side) is allowed In order to protect the flexible blades 20A and 20B, the flexible blades 20A and 20B are also positively affected, but there is little operational load and shock for the operator.

  In addition, during normal cleaning, the squeegee frame 10W moves up and down and comes into close contact with the floor FL appropriately, so that the efficiency of collecting sewage during cleaning is good. As a result, the power of the blower motor 3M as a vacuum source can be saved. The structure is simple and an inexpensive floor cleaning machine can be realized.

  In addition, while preventing local deformation of the flexible blade 20A or 20B, the rubber material, hardness, thickness, length, width, It is possible to determine the shape, etc., and to set the spring force by the springs 13... So as not to cause local deformation at that time, or to realize this without using the spring due to the weight of the squeegee unit 10. It goes without saying that it is a range.

  In addition, the squeegee unit shown in the embodiment of the present invention has a symmetrical configuration in the front and rear, and when only one side of the front and back is deteriorated, it can be reversed properly or the same parts can be used when replacing rubber. It also has the advantage that it is easy to assemble because it is attached back and forth.

  Furthermore, in the present invention, a floor cleaning machine using a brush that rotates or reciprocates is illustrated, but the number of brushes used is not one but a plurality, or the brush is swung or vibrated to clean the floor. Needless to say, a device that polishes the floor using a pad instead of a brush is also included in the technical scope of the present invention.

The perspective view explaining the external appearance and internal structure of the floor washing machine with which the double squeegee apparatus concerning this invention was implemented. The perspective view which looked at the floor-surface washing machine of the state which removed the double squeegee apparatus which concerns on this invention from the bottom face side. BRIEF DESCRIPTION OF THE DRAWINGS The structure of the double squeegee apparatus which concerns on this invention is shown, Comprising: (1) is a whole perspective view, (2) is the whole disassembled perspective view. It explains the operation of the double squeegee device according to the present invention, wherein (1) is a side sectional view at the time of forward movement, (2) is a side sectional view at the time of inversion, and (3) is a side sectional view at the time of backward movement. It explains operation | movement of the flexible blade in the double squeegee apparatus based on this invention, Comprising: (1) is an expanded sectional view at the time of advance, (2) is an expanded sectional view at the time of inversion, (3) is at the time of reverse drive FIG. The operation of the flexible blade when the squeegee unit is fixed is described, wherein (1) is an enlarged sectional view at the time of forward movement, (2) is an enlarged sectional view at the time of inversion, and (3) is a backward movement. FIG.

Explanation of symbols

1 Double squeegee type floor washer
1T Airframe
1Z Bottom
3 Blower
4 Washing water tank
6 Operation handle
7 Rotating brush
7S brush cover body
8 Vacuum path
8A, 8B Duct-shaped leg
8X, 8Y Front and rear suction ports
9 Pump
10 Squeegee units
10A, 10B Front and rear squeegees
10X, 10Y squeegee frame
20A, 21A, 20B, 21B Flexible blade
23, 24 Squeegee spacer
23B, 24B inlet
KZ Clearance (between bottom of aircraft and top of squeegee unit)
FL floor

Claims (5)

Cover the outer periphery of the rotating or reciprocating brush that cleans the floor surface while receiving the cleaning water supply with a brush cover body, and provide a vacuum path on the outer peripheral side of the brush cover body that leads to a vacuum source such as a blower. The rear sewage is configured to be sucked into the vacuum source through the front suction port and the rear suction port that lead to the vacuum path, and the front suction port and the rear suction port are respectively disposed on the front side and the rear side for collecting the sewage. A double squeegee type floor washer provided on the squeegee,
The front and rear squeegees each consist of an outer flexible blade and an inner flexible blade,
The width of the front and rear suction ports is sufficiently short with respect to the length of the flexible blade, and opens only at a substantially central position of the length of the flexible blade.
The flexible blade bends in a direction opposite to the traveling direction during the cleaning operation of the floor cleaning machine by frictionally engaging and contacting the floor surface,
By bending the outer flexible blade on the front side in the traveling direction, the suction port on the side located on the front side in the traveling direction of the front side or the rear side suction port is shielded, and the outer flexible blade on the rear side in the traveling direction is formed. A double squeegee type floor washer having the suction port located on the rear side in the direction of travel of the rear side or the front side suction port opened by the bending of the permeable blade.   Each of the front and rear squeegees is mounted on the front and rear squeegee frames at a distance from each other in the front-rear direction and between the outer and inner flexible blades, and between the two flexible blades. And the squeegee spacer that fixes the two front and rear flexible blades to the squeegee frame side while maintaining the above-mentioned distance, and the shape of the bottom outer surface of the squeegee spacer is 2. The double squeegee type floor washer according to claim 1, wherein the double squeegee type floor washer is formed in a curved surface shape similar to the natural bent shape of the outer flexible blade located on the front side in the traveling direction.   3. The double squeegee type according to claim 1, wherein the suction port leading to the vacuum path is formed in a curved surface portion outside the bottom of each squeegee spacer formed in a substantially U-shaped cross section. Floor cleaning machine.   While constituting a squeegee unit in which the front and rear squeegees are integrally connected to the squeegee frame, a suction duct from the vacuum source is provided with leg-shaped ducts provided continuously from the vacuum path to the front and rear of the vacuum path, and The interior of the squeegee spacers of the front and rear squeegee spacers extends to the front and rear suction ports, and the entire squeegee unit is attached to the floor cleaning machine body so as to be movable up and down. The double squeegee type floor surface washer according to claim 1, 2, or 3.   2. The entire squeegee unit that can move up and down is configured to be pressed in the floor direction by other elastic means in addition to its own weight, or only by its own weight. A double squeegee type floor washer according to 2, 3 or 4.

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