WO2021043425A1

WO2021043425A1 - Floor cleaning machine and method for operating a floor cleaning machine

Info

Publication number: WO2021043425A1
Application number: PCT/EP2019/073879
Authority: WO
Inventors: Fabian MOSER
Original assignee: Alfred Kärcher SE & Co. KG
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2021-03-11
Also published as: CN114340459B; EP4233662A3; CN116725436A; CN114340459A; EP4025105B1; EP4025105A1; PL4025105T3; US20220386839A1; EP4025105C0; EP4233662A2

Abstract

The invention relates to a floor cleaning machine comprising: a floor head (12); at least one cleaning roller (14) mounted on the floor head (12); a tank device (46) mounted on the floor head (12); and at least one sweeping element (70) associated with the at least one cleaning roller (14). In order to provide such a floor cleaning machine which picks up coarse dirt in an optimised manner, according to the invention the at least one sweeping element (70) is mounted on the tank device (46) and at least one portion (52) of the tank device (46), on which portion the at least one sweeping element (70) is mounted, can be moved relative to the floor head (12) in a cleaning operation.

Description

FLOOR CLEANING MACHINE AND METHOD OF OPERATING A FLOOR CLEANING MACHINE

The invention relates to a floor cleaning machine, comprising a floor head, at least one cleaning roller which is arranged on the floor head, a tank device which is arranged on the floor head, and at least one sweeping element which is assigned to the at least one cleaning roller.

The invention also relates to a method for operating a floor cleaning machine, in which a cleaning roller is angeord net on a floor head and coarse dirt is fed to the rotating cleaning roller via a sweeping element.

WO 2018/099567 A1 discloses a cleaning device with a movable sliding element for dirty fluid.

US 2017/0071437 A1 discloses a cleaning robot.

WO 2008/135120 A1 discloses a mobile sweeper with a brush roller and sweeping edge.

US 2004/0181888 A1 discloses a further cleaning device.

US 2003/0028982 A1 discloses a sweeper.

EP 1 179 314 A1 discloses a sweeper with a roller brush.

US 4,701,969 discloses a sweeper with a rotating brush.

Further sweeping devices are disclosed in CN 104939758 and CN 2899698. US 2006/0150363 A1 discloses a floor cleaning machine.

CN 2516091 discloses a floor mopping machine.

From WO 2016/058901 Al, WO 2016/058856 Al, WO 2017/063663 Al,

Surface cleaning machines are known from WO 2016/058879 A1 and WO 2016/058956 A1. A surface cleaning machine is also known from WO 2016/058907 A1.

The invention is based on the object of providing a floor cleaning machine of the type mentioned at the outset, which has an optimized coarse dirt absorption function.

This object is achieved according to the invention in the floor cleaning machine mentioned at the outset in that the at least one sweeping element is arranged on the tank device and that at least a portion of the tank device on which the at least one sweeping element is arranged is movable relative to the floor head in a cleaning operation.

It has been shown that it is advantageous if the at least one sweeping element is positioned with respect to a sweeping edge at a defined fixed distance from the floor to be cleaned. Due to the movable arrangement of the tank device or the corresponding sub-area of the tank device to the bottom head, a corresponding fixed distance can be set, even if the diameter of the cleaning roller changes, for example due to wear, or it is an adaptation to manufacturing tolerances with regard to the cleaning roller or a bearing the cleaning roller possible.

In particular, it is provided that the at least one sweeping element and the tank device are designed such that the at least one sweeping element is at a defined fixed distance from a floor to be cleaned in a cleaning operation. It has been shown that when this fixed distance was too small, then the at least one sweeping element, for example, at joints or transitions on the floor to be cleaned or can get caught. If this distance is too great, dirt particles can be run over and are not picked up. By setting a defined fixed distance, on the one hand, there is an optimized operating mode for an operator, the entanglement or the like on uneven floors such as joints being reduced, and on the other hand, there is an optimized cleaning result with regard to coarse dirt.

It has been shown that it is favorable if the defined distance from the floor is greater than zero and in particular is greater than 0.5 mm and in particular is greater than 0.7 mm and is in particular approximately 1 mm. This defined distance is in particular a height distance between a sweeping edge of the at least one sweeping element and the floor. This is an effective way of preventing hooking on uneven floors.

It has also proven to be beneficial if the defined distance is less than 1.5 mm and, in particular, is less than 1.3 mm and, in particular, at approx.

1 mm. This results in an optimized cleaning result with regard to coarse dirt. Corresponding particles can be collected via the at least one sweeping element, which is fed to the at least one cleaning roller and taken away from it.

In an advantageous embodiment, the at least one sweeping element is arranged on a floor or on a side wall of the tank device. In this way, the at least one sweeping element can be positioned in a simple manner with respect to the associated at least one cleaning roller.

It is particularly advantageous if at least one support element for a floor to be cleaned is arranged on the at least one Kehrele element and / or the tank device, which supports the at least one Kehrele element at a defined fixed distance from the floor to be cleaned. The at least one support element makes contact with the floor to be cleaned. This results in an optimized cleaning result with simple operability for a user. Due to the mobility of the tank device or the sub-area of the tank device on which the at least one Kehrele element is arranged, this defined Ab was (and is) set permanently even with different diameters of the at least one cleaning roller.

It is advantageous if at least one of the following is provided: the at least one support element is designed as a rib on the at least one sweeping element and / or the tank device; a plurality of support elements are provided; Between adjacent support elements there is a free area which does not contact the floor to be cleaned; the support elements are arranged in a row, in particular a longitudinal direction of the row being at least approximately parallel to an axis of rotation of the at least one cleaning roller; the at least one support element is designed as a sliding element or rolling element for the floor to be cleaned.

The or support element provides a fixed distance between the at least one sweeping element and the floor to be cleaned. The result is an optimized cleaning effect, even for coarse dirt particles, with the floor cleaning machine being easy to operate. The at least one Abstützele element slides over the floor to be cleaned or rolls over it. A plurality of support elements results in an optimized positioning of the at least one sweeping element. The free space between adjacent support elements minimizes the frictional force with respect to the floor to be cleaned or the influence of the support elements on the floor to be cleaned minimized. The arrangement in a row, which sits on the at least one sweeping element, for example, results in a simple structural design.

It is particularly advantageous if the tank device or the part of the tank device on which the at least one sweeping element is arranged is mounted in a floating manner on a tank device holder of the bottom head. This always results in a defined fixed distance between a sweeping edge of the at least one sweeping element and the floor to be cleaned, even with different diameters of the at least one cleaning roller (for example due to wear or manufacturing tolerances).

In a structurally simple embodiment, the tank device or the partial area of the tank device on which the at least one Kehrele element is arranged is mounted hanging on the floor head. In this way, a corresponding floating mounting with a mobility of the tank device or the partial area of the tank device can be achieved in a simple manner in order in turn to set a defined fixed distance between a sweeping edge of the sweeping element and the ground.

It is particularly advantageous if the tank device or the part of the tank device on which the at least one sweeping element is arranged is movably mounted on the floor head at least in a z-direction, with at least one of the following: the z-direction is transverse and in particular oriented perpendicular to an axis of rotation of the at least one cleaning roller; the z-direction is oriented transversely and in particular at least approximately perpendicular to a support plane of the at least one cleaning roller for a floor to be cleaned; the z-direction is oriented at least approximately parallel to a removal direction of the tank device from the bottom head.

In this way, a fixed distance between a sweeping edge of the sweeping element and a floor to be cleaned can be set in a cleaning operation in a simple manner.

It is possible that the tank device or the partial area of the tank device on which the at least one sweeping element is arranged is also mounted on the bottom head such that it can be moved in at least one further direction transverse to the z-direction. This results in a further tolerance compensation.

In particular, it is provided that the at least one sweeping element is arranged and designed such that it feeds dirt particles to the at least one cleaning roller, such dirt particles being carried along by the at least one cleaning roller by rotating the at least one cleaning roller. The at least one sweeping element collects dirt particles to a certain extent and makes them "available" to the at least one cleaning roller, the at least one cleaning roller then in turn transporting the dirt particles in order to be able to finally feed them to the tank device.

In an advantageous embodiment, the tank device is designed as a tank device for dirty fluid. This is in particular adjacent to the at least one cleaning roller. Dirty fluid (including possibly coarse dirt particles) can then be conveyed directly from the at least one cleaning roller into the tank device. In particular, this promotion can take place without a fan.

In an advantageous embodiment, at least one feed channel for dirty fluid is provided from the at least one cleaning roller to a receiving space of the tank device. It can be so effective Remove dirty fluid with a short flow path from the at least one cleaning roller and couple it into the tank device.

Conveniently, a sealing device is provided, which is arranged on the tank device or the sub-area of the tank device on which the at least one sweeping element sits, and which the at least one feed channel opposite the bottom head regardless of a position of the tank device or the sub-area of the tank device a coupling element for the at least one feed channel. A fluid-tight supply of dirty fluid to the receiving space of the tank device can thereby also be achieved with a movable tank device or a movable partial area of the tank device (in particular with a mobility to the coupling element).

In particular, the coupling element is seated on the floor head, with in particular at least one of the following: the sealing device is designed to be movable and / or elastic; at least one scraper for the min least one cleaning roller sits on the coupling element; the tank device or the partial area of the tank device on which the at least one sweeping element is arranged is movable in relation to the coupling element in a cleaning operation.

In this way, in particular, dirt fluid can be removed from the cleaning roller in an optimized manner. A fluid-tight at least one feed channel for feeding dirty fluid into a receiving space of the tank device can be achieved in a simple manner. The tank device can be implemented in a movable manner in order to produce a fixed distance between a sweeping edge and a floor to be cleaned, regardless of a diameter of the at least one cleaning roller. In a structurally simple embodiment, the tank device or the sub-area of the tank device on which the at least one sweeping element is arranged is power-driven and in particular gravity-driven, or, for example by a spring device, in the direction of a plane of the at least one cleaning roller to be cleaned Pressed ground. It can easily adjust the position of the tank device itself in order to obtain a fixed distance between a sweeping edge of the Kehrele element and the floor to be cleaned, regardless of the diameter of the at least one cleaning roller.

In an advantageous embodiment, a stripping device is provided for stripping dirty fluid from the at least one cleaning roller and for coupling it into the tank device. By means of the stripping device, the at least one cleaning roller can to a certain extent be wringed out in order to be able to remove dirty fluid from it.

In a favorable embodiment, the at least one cleaning roller has a textile trim, such as a microfiber trim, and in particular a scraper of a stripping device is immersed in the textile trim. This results in an optimized detachment effect for dirty fluid from the at least one cleaning roller.

In one embodiment, the at least one cleaning roller is designed in two parts and a central drive is provided. This enables cleaning close to the edge. The at least one cleaning roller can be designed and positioned in such a way that it extends to a lateral end of the floor head.

It is favorable if a tank device for cleaning liquid and a supply device for cleaning liquid are provided from the tank device to the at least one cleaning roller and / or to a floor to be cleaned. Due to a wiping effect, there is a better cleaning result. Dirt on a surface to be cleaned can be loosened by cleaning liquid (which is especially fresh water or fresh water with a surfactant additive, for example). The at least one cleaning roller acts mechanically on the dirt due to its rotation.

It is advantageous if a pin bar with pins for hair pick-up is provided, with pins in particular resting against a textile trim or being immersed in the textile trim of the at least one cleaning roller. In this way, hair can be picked up and collected from the floor to be cleaned. The result is an optimized cleaning result.

It is advantageous if, based on a normal direction of rotation of the at least one cleaning roller in a cleaning operation, the at least one sweeping element is connected in front of a scraper for the at least one cleaning roller. In this way, dirt particles which are collected by the at least one sweeping element can be carried away by the at least one cleaning roller and thereby carried away from the sweeping element. These then reach the scraper, where the dirt fluid (including dirt particles) can be detached.

In one embodiment, a first cleaning roller and a second cleaning roller are provided, the second cleaning roller being arranged at a distance from the first cleaning roller on the floor head, in particular with at least one of the following: a first axis of rotation of the first cleaning roller and a second axis of rotation of the second cleaning roller are oriented parallel to each other; In a normal operating mode of the floor cleaning machine, the first cleaning roller and the second cleaning roller rotate in opposite directions. This results in an optimized cleaning result. In particular, the tank device is arranged between the first cleaning roller and the second cleaning roller. This can be positioned in a "stable" manner.

In particular, a first sweeping element is assigned to the first cleaning roller and / or a second sweeping element is assigned to the second cleaning roller. The first sweeping element and the second sweeping element are advantageously arranged on the same tank device.

In one embodiment, the floor cleaning machine is hand-held and hand-guided. There is a holding device for an operator is provided, wel che is arranged on the floor head (and in particular is pivotally arranged), wherein the floor cleaning machine can be operated by a standing operator.

In an alternative embodiment, the floor cleaning machine is designed to be self-propelled and self-steering and, in particular, is designed as a wiping robot.

According to the invention, a method for operating a floor cleaning machine is provided, in which a cleaning roller is arranged on a floor head and coarse dirt is fed to the rotating cleaning roller via a sweeping element, the sweeping element being arranged on a tank device and the tank device or a portion of the tank device, on which the sweeping element is arranged, is movable to the floor head in a cleaning operation, and in which there is a defined fixed distance of the sweeping element to the floor in the cleaning operation.

The method according to the invention has the advantages already explained in connection with the floor cleaning machine according to the invention. In particular, the method according to the invention can be carried out on the floor cleaning machine according to the invention or the floor cleaning machine according to the invention can be operated with the method according to the invention.

It is particularly advantageous if the sweeping element is supported on the floor to be cleaned via at least one support element (in cleaning mode), the at least one support element being arranged on the sweeping element and / or the tank device. In this way, the defined fixed distance between a sweeping edge of the sweeping element and the floor to be cleaned can be achieved in a simple manner. This defined distance remains the same, even if a diameter of the at least one cleaning roller changes, for example due to wear, or if there are manufacturing tolerances with regard to cleaning rollers.

The following description of preferred embodiments is used in conjunction with the drawings to explain the invention in more detail. Show it:

FIG. 1 shows a partial representation of an embodiment of a floor cleaning machine according to the invention, a holding (rod) device being shown in a partial representation and only part of a two-part (front) cleaning roller being shown;

FIG. 2 shows a side view of the floor cleaning machine according to FIG. 1;

FIG. 3 shows an enlarged illustration of area A according to FIG. 2 at the moment the cleaning roller is placed on a floor to be cleaned;

FIG. 4 shows the same view as FIG. 3, the cleaning roller being attached longer and having its diameter reduced; FIG. 5 shows an exemplary embodiment of a tank device or a partial area of a tank device in a perspective illustration;

FIG. 6 shows a side view of the tank device or of the partial area according to FIG. 5;

FIG. 7 shows a sectional view along the line 7-7 according to FIG. 6;

FIG. 8 shows a sectional view of the floor cleaning machine according to FIG. 1 in the area of the front cleaning roller in a first position of a pin strip;

FIG. 9 shows the same view as FIG. 8 in a second position of the pin bar;

FIG. 10 shows the same view as FIG. 8 in a third position of the pin bar;

FIG. 11 shows a perspective illustration of an exemplary embodiment of a pin strip;

FIG. 12: a further perspective illustration of the pin strip according to FIG. 11;

FIG. 13: a further perspective illustration of the pin strip according to FIG. 11;

FIG. 14 shows a side view of the pin strip according to FIG. 11;

FIG. 15 shows a front view of the pin strip according to FIG. 11; Figure 16 shows a further embodiment of an inventive

Floor cleaning machine (in training as a self-propelled and self-steering floor cleaning machine); and

FIG. 17 shows a further exemplary embodiment of a hand-held and hand-guided floor cleaning machine.

An embodiment of a floor cleaning machine according to the invention, which is shown in FIGS. 1 and 2 in a partial representation and denoted by 10, is designed as a hand-held and hand-guided floor cleaning machine which can be operated by a standing operator.

The floor cleaning machine 10 comprises a floor head 12. At least one cleaning roller 14 is arranged on the floor head 12. In the embodiment shown, a first cleaning roller 14a and a second cleaning roller 14b are rotatably mounted on the floor head 12. The first cleaning roller 14a and the second cleaning roller 14b are spaced apart and thereby oriented parallel to one another.

The first cleaning roller 14a is rotatable about a first axis of rotation 16a. The second cleaning roller 14b is rotatable about a second axis of rotation 16b. The first axis of rotation 16a and the second axis of rotation 16b are parallel to one another.

A first shaft 18 for the first cleaning roller 14a is arranged on the bottom head 12. The second cleaning roller 14b is assigned a second shaft (not visible in the drawings). The first shaft 18 and the second shaft are each connected to a drive motor via a transmission device. This drive motor is seated in particular on the floor head 12.

It is provided that, at least for a normal operating mode of the floor cleaning machine 10, the first cleaning roller 14a and the second cleaning roller 14b are operated in opposite directions and, in particular, are operated at the same rotational speed. With regard to exemplary embodiments for the drive motor and the transmission device, reference is made to the unpublished German patent application No. 10 2019 109 946.3 of April 15, 2019 by the same applicant. Reference is made to this document in its entirety.

In one embodiment, the first cleaning roller 14a and the second cleaning roller 14b are each formed in two parts. The first shaft 18 comprises a first shaft region 20 and a second shaft region 22.

The respective first part, such as the first part 24 of the first cleaning roller 14a, is seated on the first shaft region 20. The second part of the first cleaning roller 14a is not shown in FIGS. The second part 26 of the second cleaning roller 14b is visible there.

A central drive is provided for the rotational drive of the first cleaning roller 14a and the second cleaning roller 14b. A torque-effective coupling of the drive motor to the cleaning rollers 14a or 14b takes place in a central area between the outer ends. In particular, the first cleaning roller 14a and the second cleaning roller 14b extend as far as a side edge 28 of the floor head 12. This enables cleaning close to the edge.

In this context, reference is made to DE 10 2019 109 946 as an example.

In one embodiment, a cleaning roller 14 comprises a textile trim 30 which is arranged on a corresponding cylindrical holder 32.

In a cleaning operation of the floor cleaning machine 10, the floor head 12 is supported on a floor 34 to be cleaned (FIG. 2) via the first cleaning roller 14a and the second cleaning roller 14b. The floor- head 12 with its cleaning rollers 14a, 14b has a support plane 36 for the floor 34. The floor 34 to be cleaned is in particular a hard floor.

The floor cleaning machine 10 comprises a holding device 38. This is designed in particular as a holding rod device (only part of it is shown in FIGS. 1 and 2). The holding device 38 is pivotably articulated to the floor head 12 via a pivot joint 40. A pivot axis 42 of the pivotability of the holding device 38 to the bottom head 12 is in particular oriented parallel to the first axis of rotation 16a and the second axis of rotation 16b.

There can also be further pivotability about a pivot axis 44 which is locked transversely to the pivot axis 42. The pivot axis 42 is in particular parallel to the support plane 36.

The floor cleaning machine 10 is hand-held. The holding device 38 is designed so that an operator can guide the floor cleaning machine 10 over the floor 34 to be cleaned, the floor head 12 being supported on the floor 34 via the cleaning rollers 14a, 14b, and the operator at a distance from the floor head 12 himself the bottom 34 stands; The hand-held floor cleaning machine 10 is designed in particular so that it can be operated by a standing operator. In this context, reference is made to DE 10 2019 109 946.

A tank device 46 is detachably arranged on the bottom head 12. The tank device 46 is detachably positioned on a tank device holder 48 of the bottom head 12. The tank device 46 can be detached in a removal direction 50 (FIG. 1) from the bottom head 12 downwards.

The removal direction 50 is oriented in particular perpendicular to the support plane 36. On the holder 48, the tank device 46 is positioned between the first cleaning roller 14a and the second cleaning roller 14b. The Tankeinrich device 46 is used to receive dirty fluid, which is "removed" from the cleaning rollers 14a, 14b and the tank device 46 is supplied.

In the embodiment shown, a single tank device 46 is provided for the first cleaning roller 14a and the second cleaning roller 14b.

In principle, it is also possible that the first cleaning roller 14a and the second cleaning roller 14b are each assigned a separate tank, so that the tank device comprises two separate or connected parts.

The tank device 46 is arranged in particular in such a way that dirty fluid can be coupled in directly from the cleaning rollers 14 without a fan (without suction). This is explained in more detail below.

The tank device 46 (see also FIGS. 5 to 7) comprises a trough 52 with (at least) one receiving space 54 for dirty fluid. The trough 52 has a bottom 56 on which a circumferential wall 58 is arranged. The receiving space 54 is formed between the bottom 56 and the wall 58.

In one exemplary embodiment, the trough 52 has an at least approximately cuboid external shape.

The tank device 46 comprises a cover 60. The cover 60 (FIG. 7) can be an element that is separate from the base head 12. In particular, the tank device 46 with the cover 62 can then be removed from the tank device holder 48. In an alternative embodiment, the cover of the tank device 46 is formed on the bottom head 12, for example by the tank device holder 48. In this embodiment, only the trough 52 can be removed from the floor head 12 and the corresponding cover remains on the floor head 12.

During a cleaning operation of the floor cleaning machine 10, an underside of the floor 56 of the tank device 46 faces the floor 34 to be cleaned. A first side wall 62 of the wall 58 faces the first cleaning roller 14a, and a second side wall 64 opposite the first side wall 62 of the wall 58 faces the second cleaning roller 14b.

In one embodiment, the first side wall 62 and the second side wall 64 each have a recess 66 which is used to partially accommodate the transmission device via which the corresponding shaft (such as the first shaft 18) is coupled to the drive motor with a torque effect. The recess 66 is arranged centrally on the corresponding side wall 62, 64.

In one embodiment, fixing elements 68 are arranged on the trough 52. These are designed in particular in the shape of a dome. The fixing elements 68 are used to fix the tank device 46 via the tray 52 on the tank device holder 48 (see Figure 7) and in particular for a hanging fixation and thereby a floating mounting of the tray 52 on the floor head 12 (see Figure 7). This is explained in more detail below.

The fixing elements 68 also serve, in particular, for centering and, if necessary, additional fixing of the cover 60 on the tub 52, provided that such a separate cover 60 is provided. The cover 60 then has corresponding recesses 74 (FIG. 7) through which the fixing elements 68 are immersed. A first sweeping element 70, which is assigned to the first cleaning roller 14a, is arranged on the floor head 12. Furthermore, a second sweeping element 72 is arranged on the floor head 12, which is assigned to the second cleaning roller 14b. The sweeping elements 70, 72 serve to collect dirt particles (in particular coarse dirt particles) and to feed them to the respective assigned cleaning roller 14a or 14b. These dirt particles can then be carried along by the cleaning roller 14a or 14b and can be coupled into the tank device 46.

The first sweeping element 70 and the second sweeping element 72 each have a sweeping edge 76. The sweeping edge 76 is adjacent to the textile trim 30 of the corresponding cleaning roller 14 and can rest against it or dip into it. In this context, reference is made to WO 2016/058956 A1, to which reference is expressly made.

The respective sweeping element 70, 72 with its sweeping edge 76 extends in particular at least approximately over the entire length of the associated cleaning roller 14. The sweeping edge 76 is aligned parallel to the corresponding axis of rotation 16a, 16b.

The first sweeping element 70 is arranged on the first side wall 62 at a distance from the bottom 56 of the tub 52. Correspondingly, the second sweeping element 72 is arranged on the second side wall 64 at a distance from the floor 56

It is possible that the respective sweeping element 70, 72 is formed from a rigid material or has a certain inherent elasticity.

The sweeping elements 70, 72 have, in particular facing the respective cleaning roller 14a, 14b, a contour which is adapted to the cleaning roller 14a, 14b. The first sweeping element 70 and the second sweeping element 72 are arranged on the trough 52 and thereby on the respective side wall 62 and 64 (front and rear side walls).

In principle, it is also possible for the first sweeping element 70 and / or the second sweeping element 72 to be arranged on the floor 56 with a corresponding design of the trough 52.

The first sweeping element 70 and the second sweeping element 72 are each firmly connected to the trough 52 so that they can be removed with the trough 52 from the floor head 12 and are moved along with the trough 52 to the floor head 12 when the trough 52 is movable.

It is provided that when the floor cleaning machine 10 is in operation, the respective sweeping edge 76 of the first sweeping element 70 and of the second sweeping element 72 is at a defined fixed distance D from the floor 34 to be cleaned (compare FIGS. 3 and 4). This defined distance D is independent of the diameter of the associated cleaning roller 14 and thus independent, for example, of wear on the textile trim 30. It is also independent of manufacturing tolerances.

The distance D is specified for an optimized cleaning result with regard to the coarse dirt collecting function of the sweeping element 70, 72. If the distance D is too small, then the respective sweeping element 70 or 72 can hook ver in joints, transitions or the like on the floor 34 to be cleaned and it is difficult to operate. If the distance D is too large, then there is a deteriorated coarse dirt collecting function.

In particular, the distance D is greater than zero and preferably greater than 0.5 mm and preferably greater than 0.7 mm. Furthermore, it is provided in particular that the defined distance D is less than 1.5 mm and in particular less than 1.3 mm. In a preferred embodiment, the distance D is approximately 1 mm.

In order to provide this defined distance D in a cleaning operation of the floor cleaning machine 10, support elements 78 are provided (FIGS. 3, 4) with which the first sweeping element 70 and the second sweeping element 72 are supported on the floor 34 to be cleaned. The Abstützele elements 78 are designed as sliding elements which slide over the floor 34 during the cleaning operation of the floor cleaning machine 10.

The support elements 78 are designed in such a way that the sweeping edge 76 is located at the distance D from the floor 34.

In one embodiment, the support elements 78 are formed by spaced-apart ribs 80 which are arranged on the respective sweeping element 70, 72. These ribs 80 extend beyond the turning edge 76 in the direction of the support plane 36 in order to achieve the support function on the floor 34.

Between adjacent support elements 78 or ribs 80 there is a free space via which the corresponding sweeping element 70, 72 does not contact the floor 34.

In particular, a row of support elements 78, in particular in the form of ribs, is provided on a respective sweeping element 70, 72. A corresponding row has a longitudinal direction which is parallel to the corresponding axis of rotation 16a, 16b of the associated cleaning roller 14a or 14b.

As an alternative or in addition, it is possible for support elements 78 to be arranged on the tank device 46 and thereby on the bottom 56 of the trough 52. When the floor cleaning machine 10 is in operation, the tank device 46 is supported on the floor 34 to be cleaned via the support elements 78. So that the distance D remains independent of the special situation of the cleaning roller 14, the tank device 46 or a part of the tank device (the trough 52) is floatingly mounted on the bottom head 12 and on the tank device holder 48. The tank device 46 is movable in a z-direction 82 with respect to the sub-area on which the sweeping elements 70, 72 are arranged. This z-direction 82 lies transversely and in particular perpendicular to the support plane 36 of the cleaning rollers 14 on the floor 34.

Furthermore, the z-direction 82 is oriented transversely and in particular perpendicular to the axes of rotation 16a, 16b.

Furthermore, it is preferably provided that the z-direction 82 is oriented transversely and in particular perpendicular to the pivot axis 42.

Due to the mobility of the trough 52 with the sweeping elements 70, 72 in the z-direction 82 and the corresponding floating mounting on the floor head 11, the sweeping edge 76 is always at the fixed distance D from the floor 34, regardless of the specific diameter of the cleaning rollers 14. The mobility of the trough 52 in the z-direction 82 results in an automatic setting of this fixed distance D between the sweeping edge 76 and the floor 34 during a cleaning operation. The support elements 78 ensure “correct” positioning of the sweeping elements 70, 72 in relation to the floor 34.

In one embodiment, the mobility of the tank device 46 or of the sub-area on which the sweeping elements 70, 72 (of the tub 52) sit is achieved by hanging the tub 52 on the floor head 12. In particular, the mounting is such that, on the one hand, this fixed distance D can be set and, on the other hand, when the floor head 12 is lifted from the floor 34, the trough 52 does not fall off. For this purpose, for example, corresponding counter-fixing elements are assigned to the fixing elements 68 on the tank device holder 48, which enable the mobility in the z-direction 82 and prevent falling off.

In particular, a release force and / or special release movement is then necessary in order to be able to remove the tank device 46 in the removal direction 50 from the bottom head 12.

In particular, the mobility in the z-direction 82 is then also set in such a way that the compensation with regard to the fixed distance D is made possible without the tank device 46 sitting “too loosely” on the bottom head 12.

In one embodiment, for example, there is a web on adjacent fixing elements 68, which is then positioned in a corresponding receptacle of the tank device holder 48 when the tank device 46 is fixed to the bottom head 12 and is movable in the z-direction 82, the mobility is limited to a corresponding distance, and a solution of the tank device 46 from the tank device holder 48 is blocked without additional measures.

It is basically possible that the tank device 46 as a whole with the cover 60 can be moved in the z-direction 82 with respect to the bottom head 12, or that, for example, the tub 52 can move with respect to a cover 60 or a cover formed by the tank device holder 48 is movable in the z-direction 82.

It can also be provided that the tank device 46 or the partial area of the tank device 46 on which the sweeping elements 70, 72 are located can be moved in at least one transverse direction 84a, 84b (compare FIG. 5) to the z-direction 82 and is floating in the process is mounted on the tank device holder 48.

The floor cleaning machine 10 comprises a tank device 86 for cleaning liquid (FIG. 1). This tank device 86 for cleaning liquid takes up a cleaning liquid, which can be fed directly or indirectly to the floor 34 to be cleaned via a feed device 88.

The cleaning liquid is, in particular, fresh water to which a cleaning agent additive and, in particular, a surfactant-based cleaning agent additive can be added. In principle, it is also possible for the tank device 86 to have separate tanks for fresh water and detergent additive and for appropriate mixing to take place.

In one embodiment, cleaning liquid is supplied to the corresponding cleaning roller 14 via the supply device 88; The textile trim 30 of the corresponding cleaning roller 14 is then moistened by means of cleaning fluid.

Contamination on a floor 34 can be loosened by the cleaning liquid. In addition, there is a mechanical action on the dirt via the corresponding cleaning roller 14. There is a rotary wiping movement of the cleaning roller 14 on the floor 34.

In one embodiment, the tank device 86 is arranged on the holding device 38. In principle, it is also possible for it to be arranged on the base head 12.

In this case, reference is made, for example, to WO 2017/15345 A1 or DE 10 2019 109 946.

Reference is also made to WO 2016 // 058901 A1 by way of example. For example, in a cleaning operation of the floor cleaning machine 10 in which the cleaning rollers 14 are rotated, cleaning agent is automatically supplied from the tank device 86 via the supply device 88 to the cleaning rollers 14 by opening a valve or switching a pump. A scraper device 90 is arranged on the bottom head 12, associated with each of the cleaning rollers 14 (see FIG. 8). The scraper device 90 comprises a scraper 92 which is immersed in the textile trim 30 of the associated cleaning roller 14a, 14b. Dirty fluid can be detached from the associated cleaning roller 14 by means of the corresponding scraper 92 and conveyed into the tank device 46. In this context, reference is made to WO 2019/086083 A1.

For this purpose (at least) one feed channel 94 is provided which opens into the receiving space 54.

In one embodiment, the wiper 92 is arranged on a coupling element 96. An opening 97 for the feed channel 94 is arranged on the coupling element 96. The scraper 92 forms a mouth wall for the mouth 97. In particular, the tank device 46 or the partial area on which the sweeping elements 70, 72 are located can be moved in the z-direction 82 relative to the coupling element 96.

In order to enable this mobility on the tank device 46 and to obtain a tight feed channel 94, a sealing device 98 is provided, which seals the feed channel 94 against the Einkopplungsele element 96, in order to at different positions of the tank device 46 in the z-direction to the coupling element 96 to obtain a fluid-tight feed channel 94 to.

The scraper 92 is positioned at a distance from the respective sweeping element 70, 72.

In one embodiment, it is provided that the corresponding cleaning roller 14 rotates in such a direction of rotation 100 that the scraper 92 is arranged downstream of the corresponding sweeping element 70 or 72. Coarse dirt, which is picked up by the corresponding sweeping element 70, 72, can thereby be removed by the corresponding cleaning Transport roller 14 to the scraper 92. Dirt is fluidly detached at the scraper 92 and conveyed into the receiving space 54 via the at least one feed channel 94.

It is possible, for example, for the coupling element 96 and / or the feed channel 94 to be arranged on a cover 60 of the tank device 46. In this context, reference is made to WO 2019/029821 A1.

It is then particularly advantageous if the trough 52 is movable with respect to this cover 60 in order to enable it to move in the z-direction 82, in order to be able to set the fixed distance D with respect to the turning edges 76 to the floor 34.

With regard to the floating tank device 46, the floor cleaning machine 10 functions as follows:

In a cleaning operation of the floor cleaning machine 10, it is placed on the floor 34 to be cleaned via the cleaning rollers 14a, 14b and shifted over it.

The cleaning rollers 14a, 14b are acted upon with cleaning fluid from the tank device 86. The cleaning rollers 14a, 14b rotate in the direction of rotation 100 and in particular they rotate in opposite directions.

The textile trim 30 is moistened. The cleaning rollers 14a, 14b we ken with a corresponding trimming area on the floor 34 to be cleaned. There is a mechanical action, and dirt is moistened in order to improve its detachment.

Coarse dirt is collected via the sweeping elements 70, 72 and can be taken along in the direction of rotation 100 by the corresponding cleaning roller 14a, 14b. Dirty fluid, including coarse dirt, can be detached from the cleaning roller 14 at the respective scraper 92 and is then conveyed into the tank device 46 and into the corresponding receiving space 54.

The sweeping elements 70, 72 are arranged on the trough 52 and thereby on the tank device 46 or on a partial area of the tank device 46. The trough 52 with the sweeping elements 70, 72 is mounted on the floor head 12 in a floating manner in the z-direction 82. In the cleaning operation, the tub 52 is supported by the support elements 78 on the floor 34 to be cleaned. The fixed, defined distance D between the sweeping edge 76 and the floor 34 is automatically set.

This automatic setting takes place in the case of different trim thicknesses B of the corresponding cleaning roller 14a, 14b (compare FIGS. 3 and 4). The trim thickness B can change, for example, with a corresponding wear of the cleaning roller 14, or can also be different due to manufacturing tolerances.

For example, the textile trim 30 is also more strongly compressed in an installation area on the floor 34 to be cleaned than outside (compare FIGS. 3 and 4). When the tank device 46 is full, the width B can be smaller than when it is empty.

The floating mounting of the tank device 46 or the tub 52 enables the tub 52 to move in relation to the axis of rotation 16a or 16b of the corresponding cleaning roller 14 in the z-direction 82 assumes different positions to the axis of rotation 16a.

As mentioned, this always results in the fixed distance D between the sweeping edge 76 and the floor 34, regardless of the situation at the cleaning roller 14. This in turn results in an optimized coarse dirt collection function for the respective sweeping element 70, 72. This on the one hand prevents hooking on the floor 34 and on the other hand prevents larger particles from "slipping through" under the respective sweeping element 70, 72.

The corresponding function is ensured regardless of manufacturing tolerances and over the service life of the cleaning roller 14 with wear of the textile trim 30 (with a reduction in the diameter of the cleaning rollers 14).

In one embodiment, it is provided that the tank device 46 or the trough 52 is mounted on the floor head 12 in such a way that it is pressed against the floor 34 by force, so that the support elements 78 rest on the floor 34. The weight of the tub 52 automatically positions the sweeping edge 76 at the fixed distance D from the floor 32.

As an alternative or in addition, it is possible for a spring device 102 to press the trough 52 in a direction 104 towards the support plane 36 (see FIG. 3). The spring device 102 is supported in particular on the tank device holder 48 and on the tub 52 in order to correspondingly press the support elements 78 against the floor 34.

A pin strip 106 with a plurality of pins 108 is arranged on the base head 12. The pins 108 of the pin strip 106 are pins which lie against the textile trim 30 or protrude into the textile trim 30 of the associated cleaning roller 14a, 14b.

The pin strip 106 is used to pick up hair in the manner of a hairbrush.

The pins 108 are made in particular from a plastic material. The pin strip 106 is arranged on the floor head 12 in such a way that it can be removed as a whole by an operator. The operator can then clean the pin header 106 with hair entangled therein.

The pin header 106 comprises a carrier 110 on which the pins 108 are arranged. The pins 108 protrude beyond the carrier 110.

The pins 108 extend in a pin direction 114. They have a flat end face 116. In particular, a pin 108 on the end face 116 has a diameter in the range between 0.1 mm and 0.5 mm. In one embodiment, this diameter at the end face 116 is approximately 0.3 mm.

In one embodiment, the pin strip 106 is formed on a coupling element 118. The coupling element 118 is posi tioned on the floor head 12. The coupling element 118 can be removed as a whole from the base head 12, or the pin strip 106 can be removed from the coupling element 118.

The coupling element 118 comprises a holder 120. The carrier 110 of the pin strip 106 with the pins 108 is seated firmly or detachably on the holder 120 (see above).

Furthermore, the stripper 92 is seated on the holder 120 of the coupling element 118 at a distance from the pins 108.

In one embodiment, the opening 97 is also at least partially formed on the coupling element 118.

A first row 122a and a second row 122b of pins 108 are arranged on the carrier 110, which is in particular firmly seated on the holder 120.

The first row 122a and the second row 122b extend in a longitudinal direction 124 (FIG. 11). In particular, the end faces 116 of the pins are located 108 in a row 122a or 122b on a line parallel to the longitudinal direction 124.

With the pin strip 106 positioned on the floor head 12, the longitudinal direction 124 is parallel to the corresponding first axis of rotation 16a for the first cleaning roller 14a or to the second axis of rotation 16b for the second cleaning roller 14b.

The longitudinal direction 124 is also at least approximately parallel to the support plane 36.

The second row 122b is spaced apart from the first row 122a in a transverse direction 126.

In the exemplary embodiment shown, the pins 108 in the first row 122a and in the second row 122b each lie on one line.

In principle, it is possible that pins are also offset in the transverse direction 126 within a row.

The rows 122a, 122b in particular have a length which essentially corresponds to a length of the associated cleaning roller 14a, 14b, or is somewhat shorter. As a result, hair uptake is essentially ensured over the entire length of the corresponding cleaning roller 14.

Coupling elements 128 and, in particular, latching elements, via which the pin strip 106 can be connected to a corresponding counter element on the base head 12 and, in particular, can be latched, are seated on the holder 120 and in particular on the carrier 110. The coupling elements 128 and their counter-elements are designed in such a way that an operator can loosen the pin strip 106 or the coupling element 128 in a simple manner, in particular for cleaning purposes, and insert it again. When the floor cleaning machine 10 is in operation, the pins 108 of the pin strip 106 are in contact with the textile trim 30 or are immersed in it, see FIG. 10 in particular.

When the floor cleaning machine 10 is in operation, the scraper 92 is immersed to a depth Ti (FIG. 10) in the textile trim 30 of the corresponding cleaning roller 14. A corresponding immersion depth of pins 108 is T ₂ .

The immersion depth T ₂ is in the range between (including) 0 mm and (including) 4 mm, with an immersion depth of 0 mm meaning that the pins 108 with the end face 112 are in contact with the textile trim 30.

In particular, it is provided that the pins 108 protrude into the textile trim 30 to the same extent or less than the wiper 92 (as the mouth wall for wiping off dirty fluid and coupling it into the tank device 46).

In particular, a difference Ti - T _{2 is} in the range between (inclusive)

0 mm and (including) 1 mm lying.

Pins 108 and in particular all pins 108 on pin strip 106 are aligned in pin direction 114. This pin direction 140 is oriented transversely and in particular perpendicular to the corresponding axis of rotation 16a or 16b of the associated cleaning roller 14.

The pin direction 140 is also oriented parallel or obliquely to the z-direction 82. A corresponding angle 130 of the pin direction 114 to the z direction 82 (and thus also to a normal to the support plane 36) is, for example, in the range between 0 ° and 10 °. Furthermore, the pin direction 140 lies parallel to or at an acute angle 132 to the stripper 92 (see FIG. 10). This angle 132 is in particular in the range between 0 ° and 25 °.

An optimized result for hair pick-up has been obtained when the pin direction 114 and the stripper 92 are not aligned parallel to one another, but are aligned at an acute angle and in particular an acute angle of approximately 20 °.

The pins 108 on the pin strip 106 are arranged in a manner similar to elements on a hairbrush in order to achieve an optimized hair pick-up. In relation to the direction of rotation 100, the pin strip 106 is arranged downstream of the stripper 92. Hair that has not been coupled into the mouth 97 can be picked up by the pin strip 106.

The pin strip 106 is resiliently mounted on the base head 12. As an alternative or in addition, the wiper 92 with the mouth 97 is acted upon by force and, in particular, is mounted on the base head 12 in a spring-loaded manner.

In the exemplary embodiment shown, the coupling element 118 is acted upon by force and, in particular, is mounted on the base head 12 in a spring-loaded manner. As a result, the pin strip 106 and the wiper 92 are jointly acted upon by force and, in particular, are mounted on the base head 12 under spring pressure.

The coupling element 118 is movable in a movement axis 134 and, in particular, is mounted on the floor head 12 so as to be displaceable.

The coupling element 118 is seated on a displacement guide 136. The axis of movement 134 is oriented transversely and in particular perpendicular to the respective axis of rotation 16a and 16b. The movement axis 134 lies in particular at an acute angle to the z direction 82.

The movement axis 134 also lies at an acute angle to the normal to the support plane 36.

The movement axis 134 is aligned in particular with a central axis of the cleaning roller 14 associated with it.

In one embodiment, the movement axis 134 is oriented parallel to the stripper 92.

A spring device 138 for applying force is assigned to the coupling element 118 (see FIG. 8). The spring device 138 exerts a spring force which strives to press the coupling element 118 with the pin strip 106 and the scraper 92 against the textile trim 30 of the associated cleaning roller 14.

In one embodiment, the coupling element 118 comprises a contact element 140 with a contact surface 142 as a contact surface for the textile trim 30. The contact surface 142 can contact the textile trim 30 without penetrating it.

In particular, the pins 108 and the scraper 92 extend over the contact surface 142. The contact element 140 forms a stop for the coupling element 118 to the corresponding cleaning roller 14. It is designed so that the pins 108 with the desired immersion depth T ₂ and the Immerse the scraper 92 with the desired immersion depth Ti in the textile trim 30.

Irrespective of the diameter 30 of the corresponding cleaning roller 14, it is guaranteed that the corresponding (preset) immersion depth Ti and immersion depth T _{2 is} achieved. By the spring device 138 the contact element 140 is pressed against the surface of the cleaning roller 14, regardless of the diameter of the cleaning roller 14.

Even if, for example, the diameter of the cleaning roller 14 is reduced due to the wear of the textile trim 30, the depth Ti and T ₂ specified for an optimized cleaning result is retained.

Corresponding manufacturing tolerances can also be compensated for by the displaceable mounting and spring mounting of the coupling element 118.

The coupling element 118 ensures that the distance from the textile trim 30 remains the same regardless of the state or the configuration of the corresponding cleaning roller 14. This results in an optimized wiping result for both dirty fluids and hair. The immersion depths Ti and T ₂ are independent of tolerances, roller diameter and wear. In this way, an optimized dirt pick-up (including hair pick-up) can be ensured. On the one hand, too little penetration is prevented (which can have a negative effect on dirt pick-up), and on the other hand, excessive penetration (which can mean increased power consumption of the floor cleaning machine 10 and increased motor load and gear load) is prevented.

The spring device 138 can be formed by one or more spiral springs. The application of force can, for example, also be formed by one or more rubber buffers. It is also possible for a pressure cylinder, for example, to be provided for the application of force.

In principle, it is also possible that the abutment of the abutment element 140 on the textile trim 30 of the associated cleaning roller 14 is only heavily power-driven. In the embodiment described, a coupling element 118 is provided on which both the pin strip 106 and the wiper 92 are arranged.

In principle, it is possible for separate movable and, in particular, displaceable elements for the pin strip 106 and for the wiper 92 to be provided.

It is also possible that either only the pin strip 106 is movably and in particular displaceably mounted, or only the stripper 92 is displaceably mounted.

In FIGS. 8 to 10, different positions of the coupling element 118 on its displacement guide 136 relative to the first cleaning roller 14a are shown.

The positions shown in FIGS. 8 and 9 are transitional positions for explaining the basic mode of operation.

FIG. 10 shows a final position in which the contact surface 142 rests on the outside of the textile trim 30, so that the pins 108 and the stripper 92 penetrate into the textile trim 30 _{with the specified immersion depth Ti or T 2.}

As mentioned above, it can also be provided, for example, that the pins 108 only touch the textile trim 30 and do not penetrate it (with an immersion depth T ₂ of 0 mm).

The position shown in FIG. 9 is in particular also a position for the coupling element 118 if, for example, the cleaning roller 14 is to be replaced. It is possible that a floating tank, as described with reference to the floor cleaning machine 10, is also used in a floor cleaning machine 144 (FIG. 16), which is designed to be self-propelled and in particular self-steering. A tank device for cleaning liquid is then also arranged on such a floor cleaning machine, which has a floor head 146, in particular on the floor head.

With regard to the floating storage of the tank device for dirty fluid, on which one or more sweeping elements are arranged, the function is the same as described above.

The floor cleaning machine 144 can also be equipped with one or more pin strips 106 for picking up hair.

Furthermore, it is possible that a corresponding pin strip 106 and / or a scraper 92 for a corresponding cleaning roller 14 are movably and in particular displaceably and in particular mounted with a force.

Another exemplary embodiment of a floor cleaning machine 148 (FIG. 16) comprises a floor head 150. The floor head 150 is supported by a single cleaning roller 152 on a floor to be cleaned in a cleaning operation. At the bottom head 150 sits a removable Tankein direction 154 for dirty fluid.

The bottom head 150 is seen ver with a pin strip corresponding to the pin strip 106, which is seated in particular on the tank device 154.

It is provided in particular that the pin strip 106 and / or a corresponding scraper for the cleaning roller 152 are movably and in particular particularly displaceably and, in particular, spring-loaded, as described above. List of reference symbols

Floor cleaning machine

Bottom head a first cleaning roller b second cleaning roller a first axis of rotation b second axis of rotation first shaft first shaft region second shaft region first part second part

Side edge of textile trim

holder

ground

Support level

Holding device

Swivel joint

Swivel axis

Tank facility

Tank equipment holder

Direction of removal

Tub

Recording room

ground

Wall

cover

Side wall

Side wall Recess

Fixing element first sweeping element second sweeping element

Recess

Sweeping edge

Support elements

Ribs z-direction a, 84b transverse direction

Tank facility for cleaning liquid

Feeding device

Scraper device

Scraper

Feed channel

Coupling element

mouth

Sealing device 0 direction of rotation 2 spring device 4 direction 6 pin strip 8 pin 0 carrier 2 face 4 pin direction 6 face 8 coupling element 0 holder 2a first row 2b second row 4 longitudinal direction 6 transverse direction 128 coupling element

130 wave

132 wave

134 axis of motion

136 Displacement Guide

138 spring device

140 investment element

142 contact surface

144 floor cleaning machine

146 bottom head

148 Floor cleaning machine

150 bottom head

152 Cleaning roller

154 Tank facility

D Distance to the floor 34

Ti, T ₂ immersion depth

Claims

PATENT CLAIMS

1. Floor cleaning machine, comprising a floor head (12; 146), at least one cleaning roller (14) which is arranged on the floor head (12; 146), a tank device (46) which is arranged on the floor head (12; 146) , and at least one sweeping element (70; 72) which is assigned to the at least one cleaning roller (14), characterized in that the at least one sweeping element (70; 72) is arranged on the tank device (46) and that at least one partial area ( 52) the tank device (46), on which the at least one sweeping element (70; 72) is arranged, is movable in a cleaning operation relative to the bottom head (12; 146).

2. Floor cleaning machine according to claim 1, characterized in that the at least one sweeping element (70, 72) and the tank device (46) are designed so that the at least one sweeping element (70;

72) is in a cleaning operation at a defined fixed distance (D) from a floor (34) to be cleaned.

3. Floor cleaning machine according to claim 2, characterized in that the defined distance (D) in particular based on a sweeping edge (76) to the floor (34) is greater than zero and in particular greater than 0.5 mm and in particular greater than 0.7 mm and especially at approx.

1 mm.

4. Floor cleaning machine according to claim 2 or 3, characterized in that the defined distance (D) in particular based on a sweeping edge (76) is less than 1.5 mm and in particular less than

1.3 mm and in particular about 1 mm.

5. Floor cleaning machine according to one of the preceding claims, characterized in that the at least one sweeping element (70;

72) on a bottom (56) or on a side wall (62; 64) of the tank device (46) is arranged.

6. Floor cleaning machine according to one of the preceding claims, characterized in that on the at least one sweeping element (70; 72) and / or the tank device (46) at least one Abstützele element (78) for a floor to be cleaned (34) is arranged, which which holds at least one sweeping element (70; 72) at a defined fixed distance (D) from the floor (34) to be cleaned.

7. Floor cleaning machine according to claim 6, characterized by at least one of the following: the at least one support element (78) is designed as a rib (80) on the at least one sweeping element (70; 72) and / or the tank device (46); a plurality of support elements (78) are provided; Between adjacent support elements (78) there is a free area which does not contact the floor (34) to be cleaned; the support elements (78) are arranged in a row, in particular a longitudinal direction of the row being at least approximately parallel to an axis of rotation (16a, 16b) of the at least one cleaning roller (14); the at least one support element (78) is designed as a sliding element or rolling element for the floor (34) to be cleaned.

8. Floor cleaning machine according to one of the preceding claims, characterized in that the tank device (46) or the partial area (52) of the tank device (46) on which the at least one sweeping element (70; 72) is arranged, floating on a tank device -Holder (48) of the bottom head (12; 146) is mounted.

9. Floor cleaning machine according to one of the preceding claims, characterized in that the tank device (46) or the partial area (52) of the tank device (46) on which the at least one sweeping element (70; 72) is arranged, hanging on the floor head ( 12; 146) is stored.

10. Floor cleaning machine according to one of the preceding claims, characterized in that the tank device (46) or the partial area (52) of the tank device (46) on which the at least one sweeping element (70; 72) is arranged, at least in a z- Direction (82) is movably mounted on the bottom head (12; 146), with at least one of the following: the z-direction (82) is oriented transversely and in particular perpendicular to an axis of rotation (16a, 16b) of the at least one cleaning roller (14) ; the z-direction (82) is oriented transversely and in particular at least approximately approximately perpendicular to a support plane (36) of the at least one cleaning roller (14a, 14b) for a floor (34) to be cleaned; the z-direction (82) is oriented at least approximately parallel to a removal direction (50) of the tank device (46) from the bottom head (12; 146).

11. Floor cleaning machine according to claim 10, characterized in that the tank device (46) or the partial area (52) of the tank device (46) on which the at least one sweeping element (70; 72) is arranged in at least one direction (84a; 84b) is movably mounted on the base head (12; 146) transversely to the z-direction (82).

12. Floor cleaning machine according to one of the preceding claims, characterized in that the at least one sweeping element (70;

72) is arranged and designed so that it supplies dirt particles to the at least one cleaning roller (14), such dirt particles being carried along by the at least one cleaning roller (14) by the rotation of the at least one cleaning roller (14).

13. Floor cleaning machine according to claim 12, characterized in that the tank device (46) is formed as a tank device for dirty fluid.

14. Floor cleaning machine according to claim 12 or 13, characterized by at least one feed channel (94) for dirty fluid from the at least one cleaning roller (14) to a receiving space (54) of the tank device (46).

15. Floor cleaning machine according to claim 14, characterized by a sealing device (98) which is arranged on the tank device (46) or the partial area (52) of the tank device (46) on which the at least one sweeping element (70; 72) is seated, and which seals the at least one feed channel (94) independently of a position of the tank device (46) or of the partial area (52) of the tank device (46) with respect to a coupling element (118) for the at least one feed channel (94).

16. Floor cleaning machine according to claim 15, characterized in that the coupling element (118) is seated on the floor head (12; 146), in particular with at least one of the following: the sealing device (98) is made movable and / or elastic; at least one stripping element (92) for the at least one cleaning roller (14) is seated on the coupling element (118); an opening (97) for the at least one feed channel (94) is arranged on the coupling element (118); the at least one stripping element (92) forms a mouth wall; the tank device (46) or the sub-area (52) of the tank device (46) on which the at least one sweeping element (70; 72) is arranged is movable in relation to the coupling element (118) in a cleaning operation.

17. Floor cleaning machine according to one of the preceding claims, characterized in that the tank device (46) or the part (52) of the tank device (46) on which the at least one sweeping element (70; 72) is arranged, driven by gravity, or by a The spring device (102) is pressed in the direction of a support plane (36) of the at least one cleaning roller (14a; 14b) against a floor (34) to be cleaned.

18. Floor cleaning machine according to one of the preceding claims, characterized by a stripping device (90) for stripping dirty fluid from the at least one cleaning roller (14) and for coupling into the tank device (46).

19. Floor cleaning machine according to one of the preceding claims, characterized in that the at least one cleaning roller (14) has a textile trim (30), and in particular that a scraper (92) of a stripping device (90) is immersed in the textile trim (30) is.

20. Floor cleaning machine according to one of the preceding claims, characterized in that the at least one cleaning roller (14) is designed in two parts and a central drive is provided.

21. Floor cleaning machine according to one of the preceding claims, characterized by a tank device (86) for cleaning liquid speed and a supply device (88) for cleaning liquid to the at least one cleaning roller (14) and / or to a floor to be cleaned (34).

22. Floor cleaning machine according to one of the preceding claims, characterized by a pin strip (106) with pins (108) for receiving hair, wherein in particular pins (108) are immersed on a textile trim (30) of the at least one cleaning roller (14) or on this issue.

23. Floor cleaning machine according to one of the preceding claims, characterized in that, based on a normal direction of rotation (100) of the at least one cleaning roller (14) in a cleaning operation, the at least one sweeping element (70; 72) has a scraper (92) for the at least one Cleaning roller (14) is connected upstream.

24. Floor cleaning machine according to one of the preceding claims, characterized by a first cleaning roller (14a) and a second cleaning roller (14b), which is spaced apart from the first cleaning roller (14a) on the floor head (12), in particular with at least one of the following : a first axis of rotation (16a) of the first cleaning roller (14a) and a second axis of rotation (16b) of the second cleaning roller (14b) are oriented parallel to one another; In a normal operating mode of the floor cleaning machine, the first cleaning roller (14a) and the second cleaning roller (14b) rotate in opposite directions.

25. Floor cleaning machine according to claim 24, characterized in that the first cleaning roller (14a) is assigned a first sweeping element (70) and / or the second cleaning roller (14b) is assigned a second sweeping element (72).

26. Floor cleaning machine according to one of the preceding claims, characterized by a holding device (38) for an operator, which is arranged on the floor head (12), wherein the floor cleaning machine is in particular hand-held or hand-operated, and this in particular by a standing operator is operable.

27. Floor cleaning machine according to one of claims 1 to 25, marked is characterized by a self-propelled and self-steering training.

28. A method for operating a floor cleaning machine, in particular according to one of the preceding claims, in which a cleaning roller (14) is arranged on a floor head (12) and coarse dirt is fed to the rotating cleaning roller (14) via a sweeping element (70), wherein the sweeping element (70) is arranged on a tank device (46) and the tank device (46) or a portion (52) of the tank device (46), on which the sweeping element (70) is arranged, is movable to the floor head in a cleaning operation (12), and in which in the cleaning operation there is a defined fixed distance D of the sweeping element (70) to a floor (34).

29. The method according to claim 28, characterized in that the sweeping element (70) is supported via at least one support element (78) on the floor (34) to be cleaned, the at least one support element (78) on the sweeping element (70) and / or the tank device (46) is arranged.