DE102019110634A1 - Floor cleaning machine - Google Patents

Abstract

A floor cleaning machine (1) with a machine frame (3), with a chassis (5) attached to the machine frame (3) for moving the floor cleaning machine (1) over a floor surface (7) to be cleaned, with a container (9) is shown and described. , which is attached to the machine frame (3) and in which a fresh water chamber (13) and a dirty water chamber (15) are provided, wherein means are provided to convey liquid from the floor surface to be cleaned (7) into the dirty water chamber (15) , and wherein the dirty water chamber (15) has means to drain liquid out of the dirty water chamber (15), with a flexible membrane (17), the membrane (17) in at least one fastening point (23) which extends in the vertical direction (25 ) is spaced from a bottom surface (27) of the container (9), is attached to the wall of the container (9), so that the fresh water chamber (13) and the dirty water chamber (15) between the bottom surface (27) of the Behä lters (9) and a horizontal plane (29) running through the fastening point (23) are separated from each other by the membrane (17), with either the fresh water chamber (13) the dirty water chamber (15) or the dirty water chamber (15) the fresh water chamber (13 ) surrounds, the membrane (17) seen in the vertical direction (25) below the fastening point (23) on the wall of the container (9) is fastened in such a way that an opening (19) in the membrane (17) and an opening (21) coincide in the wall of the container (9) so that liquid can flow through the opening (19) in the membrane (17) and through the opening (21) in the wall of the container (9).

Description

The present invention relates to a floor cleaning machine.

Floor cleaning machines are known from the prior art. For example, floor cleaning machines have a machine frame and a chassis attached to the machine frame for moving the floor cleaning machine over a floor surface to be cleaned. In addition, floor cleaning machines can have a container which is fastened to the machine frame and in which a fresh water chamber and a dirty water chamber are provided. The floor cleaning machine then usually has means to convey liquid from the fresh water chamber onto the floor surface to be cleaned. In addition, the floor cleaning machine has means to convey liquid from the floor surface to be cleaned into the dirty water chamber.

In order to separate the fresh water chamber and the dirty water chamber from one another, a flexible partition wall can be provided, which enables the volumes of the fresh water chamber and the dirty water chamber to change. In particular, it can thereby be achieved that during operation, when fresh water is applied to the floor surface to be cleaned and the fresh water chamber is emptied, the volume of the dirty water chamber is increased at the same time at the expense of the fresh water chamber. As a result, dirty water can in turn be absorbed to the same extent as fresh water is given off. With such a structure, the partition wall can be attached between two container sections. The attachment of the partition between the two container sections has proven to be comparatively complex, however, since the container has to be dismantled from the floor cleaning machine and the two container sections have to be detached from one another when the partition is to be replaced.

It is therefore the object of the present invention to provide a floor cleaning machine in which the replacement of a partition wall is easier than is the case in the prior art.

According to the invention, this object is achieved by a floor cleaning machine with the features of claim 1.

The floor cleaning machine has a machine frame and a chassis attached to the machine frame for moving the floor cleaning machine over a floor surface to be cleaned. The floor cleaning machine also has a container which is fastened to the machine frame and in which a fresh water chamber and a dirty water chamber are provided. Means are provided in order to convey liquid from the fresh water chamber onto the floor surface to be cleaned. Means are also provided to convey liquid from the floor surface to be cleaned into the waste water chamber. The waste water chamber has means to drain liquid from the waste water chamber. The floor cleaning machine also has a flexible membrane. The membrane is fastened to the wall of the container in at least one fastening point, which is spaced apart in the vertical direction from a bottom surface of the container, so that the fresh water chamber and the dirty water chamber are separated from each other between the bottom surface of the container and a horizontal plane through the membrane running through the fastening point are separated. Either the fresh water chamber surrounds the dirty water chamber or the dirty water chamber surrounds the fresh water chamber. The membrane is seen in the vertical direction below the fastening point on the wall, preferably on the bottom surface, of the container attached such that an opening in the membrane and an opening in the wall of the container coincide, so that liquid through the opening in the membrane and can flow through the opening in the wall of the container.

According to the invention, means are accordingly provided to convey liquid from the fresh water chamber onto the floor surface to be cleaned. The means can have a cleaning device of the floor cleaning machine, wherein the cleaning device can intervene with the floor surface to be cleaned and can apply liquid, in particular fresh water, from the fresh water chamber to the floor surface to be cleaned. The cleaning device can be connected to the fresh water chamber via a cleaning line, in particular a cleaning hose, of the floor cleaning machine, so that liquid can be brought from the fresh water chamber through the cleaning hose to the cleaning device and from there to the floor surface to be cleaned.

In addition, means are thus provided according to the invention in order to convey liquid from the floor surface to be cleaned into the dirty water chamber. The means can for example have a receiving device for liquid, which can be designed as a suction cup. With the receiving device, liquid, in particular dirty water, can be taken up from the floor surface to be cleaned. The receiving device can be connected to the dirty water chamber via a suction line, in particular a suction hose. In the waste water chamber can with the aid of a suction device designed as a suction turbine, for example, a negative pressure can be generated in relation to the pressure in the vicinity of the floor cleaning machine. As a result of this negative pressure, liquid, in particular dirty water, in the area of the receiving device can be drawn from the floor surface to be cleaned through the suction line into the dirty water chamber.

The waste water chamber has means to drain liquid from the waste water chamber. In particular, when the dirty water chamber is completely filled, it is necessary to empty it. For example, the container has an opening in its wall, for example in the bottom, which can also be referred to as a drain opening. A drain line, in particular a drain hose, via which liquid, in particular dirty water, can be drained into a drain in the floor, can be provided at the opening in the wall of the container.

The membrane is still flexible. This flexibility of the membrane enables its shape to be adapted to different filling levels of the container. For example, the fresh water chamber can be filled with a comparatively large amount of liquid and the dirty water chamber can be filled with a comparatively little liquid, which is often the case before the start of a cleaning run. The fresh water chamber can, however, also be filled with comparatively little liquid and the dirty water chamber can be filled with a comparatively large amount of liquid, which is often the case after a cleaning run. Both the fresh water chamber and the dirty water chamber can be filled with different amounts of liquid, and any combination of amounts of liquid in the fresh water chamber and the dirty water chamber can be referred to as a filling state of the container. Each of these filling states of the container puts the membrane in a corresponding operating state. In the event that the fresh water chamber is filled with a comparatively large amount of liquid and the dirty water chamber is filled with comparatively little liquid, the membrane can deform in the direction of the dirty water chamber, so that a comparatively large volume can be made available for the liquid in the fresh water chamber.

In the event that the fresh water chamber is filled with comparatively little liquid and the dirty water chamber is filled with a comparatively large amount of liquid, conversely the membrane can deform in the direction of the fresh water chamber, so that a comparatively large volume can be provided for the liquid in the dirty water chamber. A volume section of the container can thus be used successively both by the fresh water chamber and by the dirty water chamber.

The membrane is fastened to the wall of the container in at least one fastening point, which is spaced apart in the vertical direction from the bottom surface of the container, so that the fresh water chamber and the dirty water chamber are separated from one another between the bottom surface of the container and a horizontal plane through the membrane running through the fastening point are separated. The fastening of the membrane to the wall of the container can be made possible by a releasable connection between the membrane and the wall of the container, so that the membrane can be separated from the wall of the container and the membrane can be replaced. The at least one fastening point is spaced apart in the vertical direction from the bottom surface of the container, so that the flexible membrane can extend from the bottom surface of the container to the horizontal plane.

Either the fresh water chamber surrounds the dirty water chamber or the dirty water chamber surrounds the fresh water chamber. It is preferred that the fresh water chamber surrounds the dirty water chamber. If the fresh water chamber surrounds the dirty water chamber, the opening in the wall, preferably in the bottom surface, of the container can be referred to as a drain opening for the dirty water chamber. A drain line, in particular a drain hose, can be provided on the drain opening for the dirty water chamber, via which the dirty water can be drained into a drain in the floor. If the dirty water chamber surrounds the fresh water chamber, the opening in the wall, preferably in the bottom surface, of the container can be referred to as a drain opening for the fresh water. A drain line, in particular a drain hose, can be provided at the drain opening for the fresh water, via which liquid can be drained from the fresh water chamber, for example to a cleaning device already described. Alternatively, the fresh water chamber can be completely emptied via the drain opening, for example to transport the floor cleaning machine. With the help of the drain hose, liquid can be drained off in a controlled manner.

The membrane is seen in the vertical direction below the fastening point on the wall, preferably on the bottom surface, of the container attached such that an opening in the membrane and an opening in the wall of the container coincide, so that liquid through the opening in the membrane and can flow through the opening in the wall of the container. The Fastening the membrane to the wall of the container seen in the vertical direction below the fastening point can be made possible by a releasable connection between the membrane and the wall of the container, so that the membrane can be separated from the wall of the container and the membrane can be replaced.

Preferably, the membrane is attached to the bottom surface of the container so that the membrane can extend from the bottom surface of the container to the horizontal plane. The opening in the membrane and the opening in the wall of the container coincide. The coincidence of the opening in the membrane and the opening in the wall can be achieved by overlapping the projections of the openings on the horizontal plane. The opening in the membrane can be larger than the opening in the wall. In this case, the projection of the opening in the wall onto the horizontal plane can form a subset of the projection of the opening in the membrane onto the horizontal plane. The opening in the membrane can also be smaller than the opening in the wall. In this case, the projection of the opening in the membrane onto the horizontal plane can form a subset of the projection of the opening in the wall onto the horizontal plane. The two projections preferably form at least an intersection, so that liquid can flow through the opening in the membrane and through the opening in the wall of the container.

In summary, it can therefore be stated that the replacement of the membrane in the floor cleaning machine according to the invention is easier than is the case in the prior art. This is the case because the membrane is not held between two halves of the container, but is attached on the one hand to the attachment point and on the other hand in the area of the opening on the wall of the container and can thus be easily detached without dismantling the container.

In a preferred embodiment, the membrane, which can form a partition between the fresh water chamber and the dirty water chamber, is fluid-tight. The fluid-tight membrane ensures that the fresh water chamber and the dirty water chamber are separated from one another in such a fluid-tight manner that liquid cannot pass through the membrane either from the fresh water chamber into the dirty water chamber or from the dirty water chamber into the fresh water chamber.

In a further preferred embodiment, at least a section of the membrane is formed from a fine-meshed fabric, so that liquid can flow from the dirty water chamber through the section of the membrane into the fresh water chamber. The fine-meshed fabric can form a membrane filter so that dirt, preferably coarse dirt, and more preferably also fine dirt, is filtered out of the liquid when the liquid passes through the section of the membrane into the dirty water chamber.

In a preferred embodiment, the wall of the container has a wall flange to which the membrane is attached along a line, preferably running in the horizontal plane. The fastening of the membrane to the wall flange can be made possible by a detachable connection between the membrane and the wall flange, so that the membrane can be separated from the wall flange when the membrane has to be replaced. The wall flange offers a circumferential fastening option for the membrane, preferably in the horizontal plane, so that the membrane can separate the fresh water chamber and the dirty water chamber from one another, in particular in a fluid-tight manner, in an upper region of the membrane when viewed in the vertical direction.

In a further preferred embodiment, the bottom surface of the container has a bottom flange to which the membrane is attached along a line running in a bottom plane, and wherein the bottom plane preferably runs parallel to the horizontal plane. The attachment of the membrane to the bottom flange can be made possible by a releasable connection between the membrane and the bottom flange, so that the membrane can be separated from the bottom flange when the membrane has to be replaced. The bottom flange offers a circumferential fastening option for the membrane in the floor plane, so that the membrane can separate the fresh water chamber and the dirty water chamber from one another, in particular in a fluid-tight manner, in a lower region of the membrane when viewed in vertical direction.

In one embodiment or an independently inventive aspect of the present invention, a filling tube is provided in the dirty water chamber, the filling tube having an inlet opening and an outlet opening leading to the dirty water chamber, the outlet opening being arranged in the vertical direction below the inlet opening and with means are provided to convey liquid from the floor surface to be cleaned into the inlet opening. With the help of the filling tube, liquid can be fed into the waste water chamber in a controlled manner. According to the independent aspect of the present invention, a floor cleaning machine with a machine frame is provided with a chassis attached to the machine frame for moving the Floor cleaning machine over a floor surface to be cleaned, with a container which is fastened to the machine frame and in which a dirty water chamber is provided, a filling pipe being provided in the dirty water chamber, the filling pipe having an inlet opening and an outlet opening which leads to the dirty water chamber, wherein the outlet opening is arranged in the vertical direction below the inlet opening and wherein means are provided to convey liquid from the floor surface to be cleaned into the inlet opening.

In one embodiment, the filling pipe extends in the vertical direction in the waste water chamber. Extending the filling tube in the vertical direction enables liquid to be guided in a controlled manner from an area of the container that is upper in the vertical direction to a lower area of the container in the vertical direction.

In one embodiment, the floor cleaning machine has a first filter, the means for conveying liquid from the floor surface to be cleaned into the dirty water chamber being designed in such a way that liquid is conveyed from the floor surface to be cleaned through the first filter to the inlet opening of the filling pipe can be. The first filter can be a coarse dirt filter, so that coarse dirt is filtered out of the liquid before the liquid enters the filling tube through the inlet opening. Coarse dirt can for example have particles, each of which has a smallest outer diameter of at least 0.1 or 0.5 cm.

In one embodiment, a second filter is provided, which is arranged such that liquid can be conveyed from the outlet opening of the filling pipe through the second filter and into the dirty water chamber. The second filter can be a fine filter so that fine dirt is filtered out of the liquid before the liquid enters the dirty water chamber. Fine dirt can, for example, have particles, each of which has a smallest outer diameter of at least 0.01 or 0.1 cm. In particular, if the particles of the coarse dirt have a smallest outside diameter of at least 0.1 cm, the particles of the fine dirt have a smallest outside diameter of at least 0.01 cm. In addition, it is preferred that if the particles of the coarse dirt have a smallest external diameter of at least 0.5 cm, the particles of the fine dirt have a smallest external diameter of at least 0.1 cm.

In a further embodiment, a riser is also provided, which is arranged in the dirty water chamber and extends from the opening in the membrane and the opening in the wall of the container between an inlet opening provided on the riser and an outlet opening provided on the riser, wherein the The outlet opening of the riser is arranged in the vertical direction above the inlet opening of the riser and wherein the riser can be moved between a closed position and an open position, wherein in the closed position the inlet opening of the riser is in the opening in the membrane and the opening in the wall of the Container is arranged that a fluid-tight connection is formed between these and the inlet opening of the riser, and wherein in the open position the inlet opening is spaced from the opening in the membrane and the opening in the wall of the container a is arranged. In the closed position, the riser enables liquid to be conveyed through the riser into the waste water chamber. In the open position, the riser enables liquid to be drained from the dirty water chamber, in particular by the spacing of the inlet opening from the opening in the membrane and the opening in the wall of the container. Both the delivery of liquid into the waste water chamber and the delivery of liquid from the waste water chamber can take place within the opening in the membrane and the opening in the wall of the container. In the closed position, liquid can be conveyed from a suction hose through the inlet opening into the riser pipe and from there through the outlet opening into the dirty water chamber due to the negative pressure in the dirty water chamber. In the open position, liquid can be drained from the dirty water chamber through the suction hose. The suction hose can therefore also be used as a drain hose.

In a further embodiment, the opening in the wall of the container is connected to a drain hose which has an outlet section with an outlet opening, wherein the outlet section can be attached to a holding device of the floor cleaning machine so that the horizontal plane intersects the outlet section of the drain hose. When the outlet section is attached to the holding device of the floor cleaning machine, no liquid emerges from the opening in the wall of the container, even if the opening in the wall of the container is not closed.

• 1 zeigt eine schematische Perspektivansicht einer Ausführungsform einer erfindungsgemäßen Bodenreinigungsmaschine.
• 2 zeigt eine schematische Schnittansicht einer ersten Ausführungsform eines Behälters der Bodenreinigungsmaschine aus 1, wobei die Schmutzwasserkammer mit vergleichsweise viel Flüssigkeit gefüllt ist.
• 3 zeigt eine schematische Schnittansicht des Behälters aus 2, wobei die Frischwasserkammer mit vergleichsweise viel Flüssigkeit gefüllt ist.
• 4 zeigte eine schematische Schnittansicht einer zweiten Ausführungsform des Behälters der Bodenreinigungsmaschine aus 1, wobei eine Steigleitung in der Schmutzwasserkammer vorgesehen ist.
• 5 a), b) und c) zeigen Schnittansichten einer dritten Ausführungsform des Behälters der Bodenreinigungsmaschine aus 1, wobei unterschiedliche Füllzustände des Behälters dargestellt sind.
• 6 zeigt eine schematische Schnittansicht einer vierten Ausführungsform des Behälters der Bodenreinigungsmaschine aus 1, wobei eine erste Ausführungsform eines Füllrohrs sowie eine erste Ausführungsform eines ersten Filters und eine erste Ausführungsform eines zweiten Filters vorgesehen sind.
• 7 zeigt eine schematische Schnittansicht einer fünften Ausführungsform des Behälters der Bodenreinigungsmaschine aus 1, wobei eine zweite Ausführungsform des Füllrohrs sowie eine zweite Ausführungsform des ersten Filters und eine zweite Ausführungsform des zweiten Filters vorgesehen sind.
• 8 a) und b) zeigen eine sechste Ausführungsform des Behälters in einer schematischen Perspektivansicht (8 a)) und in einer schematischen Draufsicht (8 b)).
• 9 zeigt eine schematische Schnittansicht einer siebten Ausführungsform des Behälters der Bodenreinigungsmaschine in 1.

Further features, advantages and possible applications of the present invention emerge from the following description of the exemplary embodiments and the figures. In this case, all of the features described and / or illustrated in the form of themselves and in any combination form the subject matter of the invention independently their composition in the individual claims or their references. In the figures, the same reference symbols are also used for the same or similar objects.

• 1 shows a schematic perspective view of an embodiment of a floor cleaning machine according to the invention.
• 2 FIG. 13 shows a schematic sectional view of a first embodiment of a container of the floor cleaning machine from FIG 1 , whereby the dirty water chamber is filled with a comparatively large amount of liquid.
• 3 FIG. 11 shows a schematic sectional view of the container from FIG 2 , the fresh water chamber being filled with a comparatively large amount of liquid.
• 4th FIG. 12 shows a schematic sectional view of a second embodiment of the container of the floor cleaning machine from 1 , wherein a riser is provided in the waste water chamber.
• 5 a), b ) and c) show sectional views of a third embodiment of the container of the floor cleaning machine from FIG 1 , different filling states of the container are shown.
• 6 FIG. 11 shows a schematic sectional view of a fourth embodiment of the container of the floor cleaning machine from FIG 1 , wherein a first embodiment of a filling tube and a first embodiment of a first filter and a first embodiment of a second filter are provided.
• 7th FIG. 11 shows a schematic sectional view of a fifth embodiment of the container of the floor cleaning machine from FIG 1 , wherein a second embodiment of the filling tube and a second embodiment of the first filter and a second embodiment of the second filter are provided.
• 8 a) and b) show a sixth embodiment of the container in a schematic perspective view ( 8 a) ) and in a schematic plan view ( 8 b) ).
• 9 FIG. 11 shows a schematic sectional view of a seventh embodiment of the container of the floor cleaning machine in FIG 1 .

1 shows a schematic perspective view of an embodiment of a floor cleaning machine according to the invention 1 . The floor cleaning machine 1 has a machine frame 3 and one on the machine frame 3 attached landing gear 5 for moving the floor cleaning machine 1 over a floor area to be cleaned 7th on. The floor cleaning machine 1 has a container 9 on the one on the machine frame 3 is attached. On the container 9 is a cover element 11 provided that with the container 9 can be releasably connected and the container 9 covers from above.

2 shows a schematic sectional view of a first embodiment of the container 9 the floor cleaning machine 1 in 1 . In the container 9 are a fresh water chamber 13 and a waste water chamber 15th intended. The fresh water chamber 13 and the dirty water chamber 15th are through a flexible membrane 17th fluid-tight separated from each other. Alternatively, it is also conceivable that the membrane 17th is formed at least in sections or also completely from a fine-meshed fabric, so that liquid from the dirty water chamber 15th through the fine-meshed section of the membrane 17th in the fresh water chamber 13 can flow, but dirt contained in the liquid is filtered off at the fine-meshed section.

In the exemplary embodiment described here, the fresh water chamber is to ensure fluid-tight separation 13 and the dirty water chamber 15th apart the membrane 17th but designed to be fluid-tight. In the in 2 The illustrated embodiment surrounds the fresh water chamber 13 the dirty water chamber 15th . However, it can also be provided that the waste water chamber 15th the fresh water chamber 13 surrounds.

In the membrane 17th is an opening 19th . In the wall of the container 9 is also an opening 21st . The opening 19th in the membrane 17th and the opening 21st in the wall of the container 9 collapse, allowing liquid to pass through the opening 19th in the membrane 17th and through the opening 21st in the wall of the container 9 can flow.

The membrane 17th is in at least one attachment point 23 on the wall of the container 9 attached. The attachment point 23 is in the vertical direction 25th from a floor area 27 of the container 9 spaced. The membrane 17th is in the attachment point 23 on the wall of the container 9 attached so that the fresh water chamber 13 and the dirty water chamber 15th between the floor area 27 of the container 9 and one through the attachment point 23 running horizontal plane 29 through the membrane 17th are separated from each other in a fluid-tight manner.

At the in 2 The illustrated embodiment has the wall of the container 9 a wall flange 31 on where the diaphragm 17th along a, preferably in the horizontal plane 29 circumferential, line is attached. The membrane 17th is between the wall flange 31 and an upper attachment means 33 pinched that as sheet metal can be formed. The upper fastener 33 is with the wall flange 31 using screws 35 connected so that the membrane 17th between the wall flange 31 and the upper fastener 33 in the horizontal plane 29 is clamped all around.

The membrane 17th is in the vertical direction 25th seen below the attachment point 23 or the wall flange 31 on the floor surface 27 of the container 9 so attached that the opening 19th in the membrane 17th and the opening 21st in the wall of the container 9 collapse, allowing liquid to pass through the opening 19th in the membrane 17th and through the opening 21st in the wall of the container 9 can flow. The floor area 27 of the container 9 has a bottom flange 37 on where the diaphragm 17th along one in a ground plane 39 running line is attached. The ground level 39 runs parallel to the horizontal plane 29 . The membrane 17th is between the bottom flange 37 and a lower fastener 41 clamped, which can also be designed as a sheet metal. The lower fastener 41 is with the bottom flange 37 using screws 35 connected so that the membrane 17th between the bottom flange 37 and the lower fastener 41 in the ground level 39 is clamped all around.

By loosening the screws 35 can both the wall flange 31 and the upper fastener 33 as well as the bottom flange 37 and the lower fastener 41 be detached from each other so that the membrane 17th can be released from its assembled position and replaced.

The opening 21st in the wall of the container 9 is with a drain hose 43 connected so that liquid flows through the opening 21st in the wall of the container 9 and into the drain hose 43 can flow. The drain hose 43 is with a locking element 45 , which is designed here as a lid, with the container 9 connected, in particular via a to the closure element 45 provided internal thread and one on the container 9 provided external thread. The lower fastener 41 , the drain hose 43 and the closure element 45 can as a means of the dirty water chamber 15th which are designed to remove liquid from the waste water chamber 15th to drain out.

In 2 is a suction hose 47 with an exit port 49 shown, so that liquid from the floor surface to be cleaned 7th into the dirty water chamber 15th can be promoted. The suction hose 47 can be viewed as a means intended to remove liquid from the floor surface to be cleaned 7th into the dirty water chamber 15th to promote. In particular, in the waste water chamber 15th a negative pressure can be generated so that liquid flows through the suction hose 47 into the dirty water chamber 15th is promoted or sucked.

3 shows a schematic sectional view of the container 9 out 2 . In 2 is the fresh water chamber 13 filled with comparatively little liquid and the dirty water chamber 15th is filled with a comparatively large amount of liquid. In 3 is the fresh water chamber 13 on the other hand filled with a comparatively large amount of liquid and the dirty water chamber 15th is filled with comparatively little liquid. The membrane 17th is designed to be flexible, and due to the flexible design of the membrane 17th this can deform, so that a volume section of the container 9 one after the other from both the fresh water chamber 13 as well as from the waste water chamber 15th can be used. In particular, the volume of the waste water chamber 15th at the expense of the volume of the fresh water chamber 13 increase.

4th shows a schematic sectional view of a second embodiment of the container 9 the floor cleaning machine 1 out 1 , being a riser 51 with an inlet opening 53 and an exit port 55 in the dirty water chamber 15th is arranged. The riser 51 extends from the opening 19th in the membrane 17th and the opening 21st in the wall of the container 9 between the one on the riser 51 provided inlet opening 53 and the one on the riser 51 provided outlet opening 55 . The outlet opening 55 the riser 51 is in the vertical direction 25th above the inlet opening 53 the riser 51 arranged.

The riser 51 can be moved between a closed position and an open position. The inlet opening is in the closed position 53 the riser 51 so in the opening 19th in the membrane 17th and the opening 21st in the wall of the container 9 arranged that a fluid-tight connection between these and the inlet opening 53 the riser 51 is formed. The inlet opening is in the open position 53 spaced from the opening 19th in the membrane 17th and the opening 21st in the wall of the container 9 arranged. With the opening 21st in the wall of the container 9 is a suction hose 43 connected. In the closed position, negative pressure in the waste water chamber 15th Liquid from the suction hose 47 through the inlet opening 53 in the riser 51 and from there through the outlet opening 55 into the dirty water chamber 15th be promoted. In the open position, liquid can flow out of the waste water chamber 15th through the suction hose 47 be drained. The suction hose 47 can therefore also be used as a drain hose 43 be used.

5 a), b ) and c) show sectional views of a third embodiment of the container 9 the floor cleaning machine 1 out 1 , with different filling states of the container 9 are shown. These different filling states of the container 9 offset the flexible membrane 17th in different operating states. In 5 a) is the fresh water chamber 13 filled with a comparatively large amount of liquid and the dirty water chamber 15th is filled with comparatively little liquid. The flexible membrane 17th is towards the dirty water chamber 15th deformed so that a comparatively large volume for the liquid in the fresh water chamber 13 can be provided. This operating state of the membrane 17th is often reached before a cleaning trip when there is still no liquid in the waste water chamber 15th and the fresh water chamber 13 is still filled with liquid. In 5 b) are the fresh water chamber 13 and the dirty water chamber 15th filled with about the same amount of liquid. This operating state of the membrane 17th is often reached during a cleaning run. In 5 c) is the fresh water chamber 13 filled with comparatively little liquid and the dirty water chamber 15th is filled with a comparatively large amount of liquid. The membrane 17th is towards the fresh water chamber 13 deformed so that a comparatively large volume for the liquid in the waste water chamber 15th can be provided. This operating state of the membrane 17th is often reached after a cleaning run when there is hardly any liquid in the fresh water chamber 13 and the waste water chamber 15th is already filled with liquid.

The opening 21st in the wall of the container 9 is with the drain hose 43 connected, the one output section 57 with an exit port 59 having. The exit section 57 is on a holding device 61 the floor cleaning machine 1 attached so that the horizontal plane 29 the exit section 57 of the drain hose 43 cuts. The exit opening 59 is closed with a lid. The 5 a) , b) and c) show another drain hose 63 , the one in the bottom area of the fresh water chamber 13 arranged drain connection is connected to the fresh water chamber 13 for example, to transport the floor cleaning machine 1 can be completely emptied. With the help of the further drain hose 63 liquid can be drained away in a controlled manner. The other drain hose 63 has an exit section 65 with an exit port 67 on. The exit section 65 is on the holding device 61 the floor cleaning machine 1 attached so that the horizontal plane 29 the exit section 65 of the further drain hose 63 cuts. The exit opening 67 is closed with a lid.

6 shows a schematic sectional view of a fourth embodiment of the container 9 the floor cleaning machine 1 out 1 , wherein a first embodiment of a filling tube 69 and a first embodiment of a first filter 71 and a first embodiment of a second filter 73 are provided. The filling pipe 69 is in the dirty water chamber 15th arranged and extends in this in the vertical direction 25th . The filling pipe 69 has an entrance opening 75 and an exit port 77 on. The exit opening 77 is in the vertical direction 25th below the entrance opening 75 arranged and leads to the waste water chamber 15th . By a negative pressure in the container 9 can remove liquid from the floor surface to be cleaned 7th via the suction hose 47 into the entrance opening 75 be promoted. The means of getting liquid off the floor surface to be cleaned 7th into the dirty water chamber 15th to convey are designed in such a way that liquid from the floor surface to be cleaned 7th through the first filter 71 to the entrance opening 75 of the filling pipe 69 can be promoted. The second filter 73 is arranged so that liquid from the exit port 77 of the filling pipe 69 through the second filter 73 and into the dirty water chamber 15th can be promoted.

7th shows a schematic sectional view of a fifth embodiment of the container 9 the floor cleaning machine 1 in 1 , wherein a second embodiment of the filling tube 69 and a second embodiment of the first filter 71 and a second embodiment of the second filter 73 are provided. One embodiment of the wall flange 31 is shown where the diaphragm 17th can be attached.

8 a) and b) show a sixth embodiment of the container 9 in a schematic perspective view ( 8 a) ) and in a schematic plan view ( 8 b) ). One embodiment of the wall flange 31 is shown where the diaphragm 17th can be attached.

9 shows a schematic sectional view of a seventh embodiment of the container 9 the floor cleaning machine 1 in 1 . The cover element 11 is on the container 9 pivotally mounted so that the cover 11 can be pivoted between a closed position and an open position. In 9 is the cover element 11 shown in the open position in which the membrane 17th by loosening the screws 35 and removing the top fastener 33 and the lower fastener 41 can also be easily replaced.

List of reference symbols

1

Floor cleaning machine

3

Machine frame

5

landing gear

7th

Floor area

9

container

11

Cover element

13th

Fresh water chamber

15th

Waste water chamber

17th

membrane

19th

Opening in the membrane

21st

Opening in the wall of the container

23

Attachment point

25th

vertical direction

27

Bottom area of the container

29

horizontal plane

31

Wall flange

33

upper fastener

35

screw

37

Bottom flange

39

Ground level

41

lower fastening means

43

Drain hose

45

Closure element

47

Suction hose

49

Outlet opening of the suction hose

51

Riser

53

Inlet opening

55

Outlet opening

57

Exit section

59

Exit opening

61

Holding device

63

another drain hose

65

Exit section

67

Exit opening

69

Filling pipe

71

first filter

73

second filter

75

Entrance opening

77

Exit opening

Claims (11)

Floor cleaning machine (1) with a machine frame (3), with a chassis (5) attached to the machine frame (3) for moving the floor cleaning machine (1) over a floor surface (7) to be cleaned, with a container (9) which is fastened to the machine frame (3) and in which a fresh water chamber (13) and a dirty water chamber (15) are provided, wherein means are provided to convey liquid from the fresh water chamber (13) onto the floor surface (7) to be cleaned, and wherein means are provided to convey liquid from the floor surface (7) to be cleaned into the dirty water chamber (15), and the dirty water chamber (15) having means for draining liquid from the dirty water chamber (15), with a flexible membrane (17), wherein the membrane (17) is fastened to the wall of the container (9) in at least one fastening point (23), which is spaced in the vertical direction (25) from a bottom surface (27) of the container (9), so that the fresh water chamber ( 13) and the dirty water chamber (15) are separated from one another by the membrane (17) between the bottom surface (27) of the container (9) and a horizontal plane (29) running through the fastening point (23), wherein either the fresh water chamber (13) surrounds the dirty water chamber (15) or the dirty water chamber (15) surrounds the fresh water chamber (13), wherein the membrane (17) seen in the vertical direction (25) below the fastening point (23) on the wall, preferably on the bottom surface (27), of the container (9) is fastened such that an opening (19) in the membrane (17) and an opening (21) in the wall of the container (9) coincide so that liquid can flow through the opening (19) in the membrane (17) and through the opening (21) in the wall of the container (9) . Floor cleaning machine (1) after Claim 1 wherein the membrane (17) is fluid-tight. Floor cleaning machine (1) after Claim 1 , wherein at least a section of the membrane (17) is formed from a fine-meshed fabric so that liquid can flow from the dirty water chamber (15) through the section of the membrane (17) into the fresh water chamber (13). Floor cleaning machine (1) according to one of the preceding claims, wherein the wall of the container (9) has a wall flange (31) to which the membrane (17) is attached along a line, preferably running in the horizontal plane (29). Floor cleaning machine (1) according to one of the preceding claims, wherein the bottom surface (27) of the container (9) has a bottom flange (37) to which the membrane (17) is attached along a line running in a floor plane (39), and wherein the floor plane (39) preferably runs parallel to the horizontal plane (29). Floor cleaning machine (1) according to one of the preceding claims, wherein a filling pipe (69) is provided in the dirty water chamber (15), wherein the filling pipe (69) has an inlet opening (75) and an outlet opening (77) which leads to the waste water chamber (15), wherein the outlet opening (77) of the filling tube (69) is arranged in the vertical direction (25) below the inlet opening (75) of the filling tube (69) and wherein means are provided to convey liquid from the floor surface (7) to be cleaned into the inlet opening (75). Floor cleaning machine (1) after Claim 6 , wherein the filling pipe (69) extends in the vertical direction (25) in the dirty water chamber (15). Floor cleaning machine (1) after Claim 6 or 7th , the floor cleaning machine (1) having a first filter (71), the means for conveying liquid from the floor surface (7) to be cleaned into the dirty water chamber (15) being designed in such a way that liquid from the floor surface (7) to be cleaned ( 7) can be conveyed through the first filter (71) to the inlet opening (75) of the filling tube (69). Floor cleaning machine (1) according to one of the Claims 6 to 8th , wherein a second filter (73) is provided which is arranged so that liquid can be conveyed from the outlet opening (77) of the filling tube (69) through the second filter (73) and into the dirty water chamber (15). Floor cleaning machine (1) according to one of the preceding claims, wherein a riser (51) is provided which is arranged in the dirty water chamber (15) and extends from the opening (19) in the membrane (17) and the opening (21) in the The wall of the container (9) extends between an inlet opening (53) provided on the riser pipe (51) and an outlet opening (55) provided on the riser pipe (51), wherein the outlet opening (55) of the riser pipe (51) is arranged in the vertical direction (25) above the inlet opening (53) of the riser pipe (51) and wherein the riser (51) can be moved between a closed position and an open position, wherein in the closed position the inlet opening (53) of the riser (51) is arranged in the opening (19) in the membrane (17) and the opening (21) in the wall of the container (9) in such a way that a fluid-tight connection between them and the inlet opening (53) of the riser pipe (51) is formed, and wherein in the open position the inlet opening (53) is arranged at a distance from the opening (19) in the membrane (17) and the opening (21) in the wall of the container (9). Floor cleaning machine (1) according to one of the preceding claims, wherein the opening (21) in the wall of the container (9) is connected to a drainage hose (43) which has an outlet section (57) with an outlet opening (59), the outlet section (57) can be attached to a holding device (61) of the floor cleaning machine (1), so that the horizontal plane (29) intersects the outlet section (57) of the drainage hose (43).

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