EP3042599A2 - Self-propelled floor cleaning appliance comprising a floor cleaning roller for applying a floor cleaning liquid - Google Patents

Abstract

The invention relates to a self-propelled floor care appliance for the automated care of floor surfaces, comprising a drive system (3) for moving the floor care appliance over the floor surface to be maintained and a device control which controls the floor care appliance along a travel path, and a floor care roll containing rotatable floor care liquid (20) ( 10) for applying the floor care liquid (20) to the floor surface to be cared for. The self-propelled floor care appliance is characterized in that the floor care roller (10) has an outer hollow roller body (11) in which an inner hollow roller body (15), which is movable relative to the outer roller body (11), is arranged to receive the floor care fluid (20). wherein the inner roller body (15) depending on its position relative to the outer roller body (11) is sealed so that leakage of soil care fluid (20) from the inner roller body (15) is prevented.

Description

The invention relates to a self-propelled ground care device for automated floor care, comprising a drive system for moving the floor care device over the floor surface to be maintained and a device control controlling the floor care device along a driveway, and a floor care roll containing rotatable and floor care liquid for applying the floor care liquid the floor area to be cared for.

Self-propelled floor cleaning devices are used for automated cleaning of floor surfaces. They are for example designed as vacuum cleaners, which are then usually referred to as vacuum robots. Furthermore, self-propelled cleaning devices for wiping a floor are known and combi devices that can clean by sucking and wiping.

In self-propelled floor wiping equipment, wiping liquid is typically applied to the floor by means of a pump system via spray nozzles. Such a system is expensive and only useful if a larger amount of liquid must be applied. If liquid is applied primarily for cleaning purposes, but for care purposes, it is usually sufficient to apply a smaller amount of liquid. Such floor care liquids are, for example, oil or wax-containing and serve the care of hard floors such as parquet or plank floors.

To apply care liquids in small quantities, for example, the aforementioned floor care roller can be used. The floor care roll stores the floor care liquid and releases it in small quantities, preferably while it is rotating. By rotating the roller, the floor care liquid is applied to the floor and worked into it, whereby the floor can be polished as well. With the floor care roller, a floor care device can store and apply floor care liquid without the need for a complex pump system.

The floor care roll can also be designed to be compatible with a brush roll of a vacuum robot with respect to their outer dimensions and their storage, so that they can be easily replaced with an existing brush roll. In this way, a vacuum robot can be easily converted to the floor care device.

In particular, when the floor care roll is to be stored over a longer period, there may be an undesirable escape of the floor care liquid. Longer storage times occur, for example, before a first use, when the floor care roll is pre-filled with soil care liquid manufacturer. If the floor care roll was only partially emptied during a care operation, storage may also be provided for a longer period of time until a next use.

It is therefore an object of the present invention to provide a self-propelled floor care device with a care roller, in which leakage of floor care fluid is prevented even when stored for a long period of time.

This object is achieved by a self-propelled floor cleaning device having the features of the independent claim. Advantageous embodiments and further developments are the subject of the dependent claims.

An inventive self-propelled floor care device of the type mentioned is characterized in that the floor care roller has an outer hollow roller body in which a relative to the outer roller body movable inner hollow roller body for receiving the floor care liquid is arranged, wherein the inner roller body depending on its position relative to the outer roller body is sealed so that leakage of soil care fluid from the inner roller body is prevented.

The floor care roller thus has two hollow roller bodies arranged one inside the other, the floor care fluid being stored in the interior of the roller body. The roller bodies have a valve function: Depending on the relative position of the roller bodies to each other, escape of floor care fluid is either prevented or possible.

Regardless of any additional mechanisms that allow leakage of the floor care fluid only during rotation and dose the floor care fluid in the care operation, in this way a secure seal of the reservoir of the floor care fluid is given. Even with prolonged storage of floor care roll leakage of soil care fluid is prevented.

As an additional mechanism, bores arranged in a lateral surface of the outer roller body may be covered on at least one side by a membrane, preferably of a synthetic material, in particular a textile material. The membrane is selected so that it is impermeable to the floor care liquid at standstill of the roll body substantially. Only with a rotation of the roller body press on the Floor care liquid acting centrifugal forces through the membrane. The membrane thus becomes permeable to the soil care fluid. Alternatively, bores arranged in a lateral surface of the outer roller body can be closed by a respective fiber plug containing preferably polyester fibers. Capillary forces of the fibers of the fiber stoppers retain the floor care liquid unless the roll body rotates.

In an advantageous embodiment of the self-propelled floor care device, the valve function is achieved in that in a lateral surface of the outer roller body and in a lateral surface of the inner roller body respectively bores are present, which are positioned in a position of the inner roller body relative to the outer roller body not congruent to each other and are positioned in a different position at least partially congruent to each other. Accordingly, only at congruent (hereinafter also referred to as aligned) holes positioned floor care fluid escape from the inner roller body.

In this case, the inner roller body relative to the outer roller body along its longitudinal axis slidably and / or rotatably disposed in the outer roller body to move the roller body relative to each other.

In a further advantageous embodiment of the self-propelled ground care device, the inner roller body is accessible from the outside manually manually relative to the outer roller body in position variable. Preferably, the inner roller body to change its position with at least one outwardly projecting bearing pin, which is suitable for the rotatable mounting of the floor care roller coupled. Thus, the desired state - inner roller body sealed or not -each manually adjusted as needed.

In a further advantageous embodiment of the self-propelled floor care device, a drive for rotating the floor care roller acts on the inner roller body. Preferably, the inner roller body is rotatably coupled to at least one outwardly projecting bearing pin and / or an outer end face, wherein the drive acts on the bearing pin and / or the outer end face. In this way, the drive torque of the floor care roll is automatically used in its rotational movement to activate the exit of the floor care liquid.

In a further advantageous embodiment of the self-propelled floor care device, the inner roller body is sealed in at least one area with a pierceable sealing film. Preferably, a mandrel is arranged in the interior of the outer roller body, which is suitable for piercing the sealing film when the inner roller body moves. The inner roller body can be glued by means of the sealing film, for example, at its edge can be securely sealed and sealed during the manufacturing process of the floor care roll. By piercing the sealing foil occurs a leakage of the floor care liquid and thus a one-time activation of the floor care roll.

In a further advantageous embodiment of the self-propelled ground care device, an absorbent layer, preferably a nonwoven layer, can be fixed to the outer roller body for applying the floor care fluid. This layer can be formed tubular and pushed onto the outer roller body. Alternatively, the absorbent layer can be wound in adjacent and / or superimposed webs on the outer roller body. The co-rotating absorbent layer distributes the exiting soil care fluid and carries it to the ground. In addition, it serves an effective polish of the soil.

Figur 1

eine schematische Seitendarstellung eines Bodenpflegegeräts mit einer Bodenpflegewalze;

Figur 2

schematische Schnittdarstellungen eines ersten Ausführungsbeispiels einer Bodenpflegewalze in drei verschiedenen Betriebszuständen;

Figur 3

eine schematische Schnittdarstellung der Bodenpflegewalze der Figur 2 in Längsrichtung;

Figur 4

schematische Schnittdarstellungen eines zweiten Ausführungsbeispiels einer Bodenpflegewalze in zwei verschiedenen Betriebszuständen;

Figur 5

eine schematische Schnittdarstellung eines dritten Ausführungsbeispiels einer Bodenpflegewalze; und

Figur 6

eine schematische Schnittdarstellung eines vierten Ausführungsbeispiels einer Bodenpflegewalze.

The invention will be explained in more detail by means of embodiments with reference to figures. The figures show:

FIG. 1

a schematic side view of a floor care device with a floor care roller;

FIG. 2

schematic sectional views of a first embodiment of a floor care roll in three different operating conditions;

FIG. 3

a schematic sectional view of the floor care roll of FIG. 2 longitudinal;

FIG. 4

schematic sectional views of a second embodiment of a floor care roll in two different operating conditions;

FIG. 5

a schematic sectional view of a third embodiment of a floor care roller; and

FIG. 6

a schematic sectional view of a fourth embodiment of a floor care roll.

In the FIG. 1 a modified suction robot 1 as an embodiment of a floor care device is shown schematically in a partially sectioned side view. The vacuum robot 1 has arranged on or in a housing 2 a drive system 3, which acts on two drive wheels 4, one arranged on each side of the vacuum robot 1. The drive wheels 4 can be driven independently of one another via drive motors of the drive system 3 which are not shown separately here. Further, a support wheel 5 is provided, which is either pivotable or as a rotatable ball in all directions is trained. With independent control of the direction of rotation and / or rotational speed of the drive wheels 4, the vacuum robot 1 can perform movements with independently adjustable rotational and translational speeds on a floor surface to be maintained.

In the central region of the vacuum robot 1, a suction mouth 6 is arranged, which is connected in a known manner with a dust cassette 7 and a suction fan 8. In the area of the dust cassette, a filter system, e.g. with a vacuum cleaner bag arranged.

The vacuum robot 1 is controlled by a device control, not shown here, which comprises one or more microcontrollers. The device control controls the individual components of the vacuum robot 1, such as e.g. the drive system 3 or the suction fan 8. In addition, the device control on a navigation system that plans a guideway of the vacuum robot 1 and causes the route is traveled. For navigation purposes to avoid collisions with obstacles also long and / or kurzreichweitige sensors are present, which are evaluated by the device control or the navigation system. These sensors can e.g. work optically or acoustically.

The in FIG. 1 Suction robot 1 shown is modified to a floor care device in that it has a floor care roller 10 for applying a floor care fluid.

The floor care roller 10, hereinafter also referred to as care roller 10, is arranged in the region of the suction mouth 6. It extends substantially over the entire width of the suction mouth 6 and thus also of the vacuum robot 1. If the illustrated vacuum robot 1 used in unmodified form for cleaning a bottom surface, instead of the care roller 10, a brush roller can be arranged. This is rotated by vacuum robot 1 via drive motors and brushes dust and dirt particles with radially projecting bristles in the region of the suction mouth 6, for example, from the fibers of a carpet, so that they can be easily sucked into the suction 6.

When using the vacuum robot 1 as a floor care appliance, the brushing roller is exchanged for the care roller 10 shown, which can also be set in rotation by the vacuum robot 1. A change between the use of the vacuum robot 1 as a floor cleaning device and as a floor care device can be done quickly and easily by replacing the brush roller or care roller 10 accordingly. In a further development of the illustrated vacuum robot 1, the change between the brushing roller and care roller 10 can also be made automated by, for example, in the area of a charging station of the Vacuum robot 1 is a storage and recording option for the brushing roller or the care roller 10 is provided so that the vacuum robot 1 can replace them independently.

Inside the care roller 10 is an in FIG. 1 Bottom care fluid, not shown, which preferably exits only during rotation of the care roller 10 from this and is applied by this on the floor to be cared for. In addition, according to the invention additional precautions are taken to prevent leakage of the soil care fluid in the possibly long storage period before a first use and possibly also in subsequent longer breaks in use.

In FIG. 2 a first embodiment of a care roller 10 is shown in a schematic sectional view in three partial images a, b and c. The partial images a and b show the care roller 10 in a rest position, whereas partial image c reproduces the care device 10 rotating in the care operation.

The care device 10 comprises an outer roller body 11, in its central portion through which the cut in FIG. 2 is guided, is formed hollow cylindrical. Distributed over the circumference and over the length of the outer roller body 11 are bores 12 introduced into the wall of the roller body 11.

Outside on the roll body 11, a nonwoven layer 13 is arranged as an absorbent layer. The nonwoven layer 13 may be formed tubular and be pushed from one side to the outer roller body 11. The starting material of the nonwoven layer 13 may alternatively be flat and placed around the outer roller body 11 and fixed there on the outer roller body 11. For this example, an adhesive connection or a connection by means of a hook and loop fastener is suitable. In order to avoid an axially running seam along the surface of the outer roller body 11, the nonwoven layer 13 may be precut in such a way that a seam extends helically along the surface of the outer roller body 11, possibly with several screw threads.

On the inside of the wall of the roller body 11, a membrane 14 is arranged. The membrane 14 covers at least the holes 12, but may also extend over the entire inner circumferential surface of the outer roller body 11. The function of the membrane 14 will be described below in connection with the subfigure c of FIG. 2 explained in more detail.

Concentric with the outer roller body 11, an inner roller body 15 is arranged adjacent to the membrane 14 in the interior of the outer roller body 11. The inner roller body 15 is in terms of its outer diameter to the inner diameter of the outer Roll body 11 adapted so that a good fit of the two roller body 11, 15 is given taking into account the intermediate membrane 14, the inner roller body 15 but can still be rotated relative to the outer roller body 11. With regard to their extension in the axial direction, the roller bodies 11, 15 are adapted to one another such that no appreciable relative movement between the outer and inner roller bodies 11, 15 is possible in the direction of the longitudinal axis of the care roller 10.

In the lateral surface of the inner roller body 15 are also holes 16 are introduced in the wall analogous to the holes 12 in the outer roller body 11. The inner roller body 15 is a hollow body, wherein the cavity formed in its interior is at least partially filled with a floor care fluid 20. In the subfigures a and b of FIG. 2 is such a floor care liquid 20, hereinafter abbreviated also referred to as care liquid 20, filled to a water level 21. In the axial direction of the inner roller body 15 is closed on both sides, for example, with inserted or integrally molded end caps. The care liquid 20 can thus escape from the inner roller body 15 only through the bores 16.

Part of the a FIG. 2 shows the care roller 10 in a storage state. In this state, the inner roller body 15 is rotated relative to the outer roller body 11 such that none of the bores 16 is positioned congruent with one of the bores 12. In the illustrated state, no care liquid 20 can escape from the inner roller body 15. This state of the care roller 10 is also called "deactivated" below. The two roller bodies 11,15 together with their holes 12,16 a valve mechanism that prevents leakage of the care liquid 20. A seal is achieved in particular by a snug fit of the inner roller body 15 in the outer roller body 11. The intermediate membrane 14 may additionally have a sealing effect.

In part figure b an operating condition of the care roller 10 is shown, in which the inner roller body 15 is rotated relative to the outer roller body 11, that the holes 16 and 12 are in pairs in alignment and corresponding care liquid 20 in principle through the holes 16 and 12 of the Cavity in the inner roller body 15 can reach the nonwoven layer 13. This state of the care roller 10 is also called "activated" below.

In the activated state shown in the sub-figure b prevented in the illustrated embodiment, the membrane 14 which is disposed between the bores 16 and 12, an unhindered leakage of the care liquid 20 in the nonwoven layer 13. The membrane 14 is a permeable membrane, however, is initially not permeable to the occurring low hydrostatic pressures that the care liquid 20 exerts on the membrane 14 in the illustrated state. Accordingly, in the state shown in subfigure b, care liquid 20 does not initially pass through the membrane 14 and through the bores 12.

Part c finally shows the care roller 10 in a nursing mode. During operation of the floor care appliance, the care roller 10 is set in rotation, as in the subfigure c of FIG. 2 is indicated. In this case, speeds in the range of about 400 to about 1200 revolutions per minute can be achieved.

Due to the rotation and the centripetal forces to be applied, the care liquid 20 is pressed outwards against the membrane 14. The care liquid 20 is distributed by the rotation substantially also hollow cylindrical on the inner wall of the inner roller body 15. The centrifugal forces occurring in reaction to the Zentripetalkräfte then press the care liquid 20 through the membrane 14 and subsequently through the holes 12 in the nonwoven layer 13th

The membrane 14 may be made of a synthetic material, for example. If the centrifugal forces occurring during the rotation of the care roller 10 exceed the forces necessary for the penetration of liquid into the membrane, the membrane 14 becomes permeable to the care liquid 20. For a given membrane 14, a dosage of the amount of care liquid 20 delivered per unit time can be adjusted by varying the rotational speed.

For the care of a floor, for example a hard floor such as a plank floor or a parquet, the floor care appliance moves with rotating floor care roller 10 over the soil to be maintained, the nonwoven layer 13 has contact with the soil surface. As a result of the rotation of the care roller 10, the floor care liquid 20 is applied to the floor via the nonwoven layer 13 and, at the same time, the floor is polished by the nonwoven layer 13. It is provided that at a standstill of the ground care device, the rotational movement of the care roller 10 stops to prevent an excessive order of care liquid 20 at the appropriate location. During use of the care roller 10 may be provided to turn off the suction fan 8. Alternatively, it is possible to operate the suction fan 8, possibly at a lower speed than in the pure suction mode, in the care operation to suck in dirt particles before they are taken up by the rotating care roller 10 or thrown.

It should be noted that in the in FIG. 2 illustrated embodiment, instead of the membrane 14, other elements can be used to the care liquid 20th dosed out. For example, the holes 12 may be formed so small that only small amounts of care liquid 20 can escape, even if the holes 16 and the holes 12 are positioned in alignment with each other. Alternatively, it is also possible to arrange 12 fiber plugs in the holes. These may for example be inserted and / or glued to the outer roller body 11. The fiber plugs are made of a fiber material, in particular a polyester fiber material. In their construction, the fiber stoppers may, for example, correspond to fiber mines as used in fiber pens. The capillary forces acting within the fiber stoppers prevent unhindered passage of the care liquid 20 into the nonwoven layer 13, even if the inner and outer roller bodies 11, 15 are positioned relative to one another such that the bores 12, 16 are aligned with one another in principle.

In FIG. 3 is shown in a longitudinal section through a care roller 10, as a rotation of the outer and the inner roller body 11, 15 can be brought to one another from the outside. In the example of the FIG. 3 shown care roller 10 corresponds in structure in principle in FIG. 2 shown. For clarity, the holes 12,16 in the inner or outer roller body 11, 15 in the FIG. 3 not shown. In the FIG. 3 shown care roller 10 is also shown shortened. It is understood that it can have a greater length than its diameter FIG. 3 reproduces.

According to the example of FIG. 3 forms an end face of the inner roller body 15 an outer end face of the care roller 10. From the opposite side of the outer roller body 11 is attached to the inner roller body 15, wherein the outer roller body 11 is constructed as a one-sided closed tube, so that an end face of the outer roller body the second end face of the care roller 10 forms. At each of the end faces, a bearing pin 17 is arranged centrally, with which the care roller 10 can be rotatably mounted in the floor care device. The end faces of the care roller 10 can now be rotated against each other, which leads to a rotation of the inner roller body 15 relative to the outer roller body 11. In this case, stops may be provided, in particular a stop in the relative position of the two roller bodies 11, 15 to each other, in which the bores 16 and 12 are aligned with each other.

Activation of the care roller 10 can for example be done manually by the end faces of the care roller 10 are rotated relative to each other before the first use. In addition to the abovementioned stop, a detent position can also be provided, such that the inner and outer roller bodies 11, 15 engage in the activated and / or deactivated position.

In addition to the manual activation and automatic activation of the care roller 10 may be provided if they are in the rotating operating condition (see. Figure 2c ) is located. For this purpose, for example, the inner roller body 15 and the outer roller body 10 may be connected to each other via a spring, that in the idle state of the deactivated state (see. FIG. 2a ) is taken. To operate the care roller 10 can then be provided that the care roller 10 is driven to rotate on the inner roller body 15 and the associated end face or the bearing pin 17 mounted there, so in the embodiment of FIG. 3 On the right side of the care roller 10. Frictional forces experienced by the nonwoven layer 13 on the floor to be cared, then automatically lead to a rotation of the outer roller body 11 relative to the inner roller body 15, whereby the care roller 10 in the activated state with mutually aligned holes 12, 16 is transferred. The drive torque of the care roller 10 during its rotational movement is thus used to activate the exit of the care liquid 20. Shortly before completion of the care process, the floor care device can leave the care roller 10 rotate briefly in another direction, thereby ensuring that the holes 12,16 are no longer one above the other. The care roller 10 is then deactivated for permanent storage.

FIG. 4 shows a second embodiment of a care roller 10 for use in a floor care device. The same reference numerals in this as in the following figures identify the same or equivalent elements as in the previously described figures.

Also in FIG. 4 Care roller 10 shown in two partial images a, b has an inner roller body 15 and an outer roller body 11, each with holes 12 and 16, respectively. Again, a membrane 14 is disposed between the outside of the inner roller body 15 and the inside of the outer roller body 11. Also as in the first embodiment, the care liquid 20 is filled in the cavity in the inner roller body 15. Apart from the holes 16, the inner roller body 15 is hermetically sealed. An externally applied to the care roller 10 absorbent layer, such as a nonwoven layer is not shown here for reasons of clarity.

Part a shows the care roller 10 in a deactivated state in which an outlet of care liquid 20 is independent of the retention effect of the membrane 14 is prevented by that none of the holes 16 of the inner roller body 15 is positioned on one of the bores 12 of the outer roller body 11.

Part of the b FIG. 4 on the other hand shows the activated state in which the holes 12, 16 are positioned in alignment over one another and thus leakage of care liquid 20th is possible in principle. In contrast to the first embodiment, the inner roller body 15 is not rotated relative to the outer roller body 11 for the transition between the activated and deactivated state, but shifted along the longitudinal axis (rotation axis) of the care roller 10.

In FIG. 5 is shown in a further embodiment, as a displacement of the inner roller body 15 relative to the outer roller body 11 along the axis of rotation of the care roller 10 can be brought from the outside. In the embodiment of the FIG. 5 For this purpose, the bearing pins 17 are also axially movable, whereby the inner roller body 15 can be pushed back and forth within the outer roller body 11.

In a combination of the two embodiments described, it is conceivable that the transition between deactivated and activated state of the care roller 10 is not exclusively via a rotary motion or exclusively via a translational movement, but for example spirally via a combined rotational and translational movement. Via corresponding guide curves, which are attached to the outside of the inner roller body 15 or inside of the outer roller body 11 and extending in these guide pins on the other roller body, such a spiral movement for the two roller bodies 11, 15 can be predetermined to each other.

FIG. 6 shows a further embodiment of a care roller 10, the example in the floor care device of FIG. 1 can be used. In the embodiments of the previously shown FIGS. 2 to 5 In each case, an activation could be carried out for the use of the care roller 10 and subsequently also a deactivation in order to store the care roller 10 after a use in which the care fluid 20 has not been completely used up. The embodiment of FIG. 6 shows a nursing roller 10 which can be activated only once and can no longer be deactivated.

Even with the care roller 10 of FIG. 6 an outer roller body 11 is provided with holes 12. As with the examples of FIGS. 4 and 5 For reasons of clarity, an externally applied absorbent layer (nonwoven layer) is not shown.

Further, in turn, an inner roller body 15 is disposed within the outer roller body 11, in which the care liquid 20 is stored. Unlike in the embodiments previously shown, the outer diameter of the inner roller body 15 is smaller than the inner diameter of the outer roller body 11. In the lateral surface of the inner roller body 15, no holes are provided. Instead, a large-area opening in an end face of the inner roller body 15 is arranged, which after filling the Care liquid 20 in the manufacturing process with a sealing film 18, which can be glued or welded, for example, is closed.

The inner roller body 15 is axially movable relative to the outer roller body 11, whereby the sealing film 18 can be pressed against a mounted on the inside of an end face of the outer roller body 11 mandrel 19. The mandrel 19 penetrates and destroys the sealing film 18, whereby care liquid 20 runs from the inner roller body 15 into the remaining cavity of the outer roller body 11 and thus can pass through the bores 12 into the surrounding nonwoven layer. Even if in the FIG. 6 not shown, in turn, a membrane may be provided which covers the holes 12 and prevents uncontrolled outflow of the soil liquid 20 after activation. Alternatively, said fiber plug may be disposed in the bores 12.

In order to prevent an unwanted premature activation, the inner roller body 15 in the in FIG. 6 be shown position relative to the outer roller body 11 fixed. For this purpose, a latching connection may be provided or else a material-locking connection, for example an adhesive connection, which must first be broken.

A similar kind of in FIG. 6 shown activation is also conceivable that the inner roller body 15 is not displaced in the outer roller body 11, however, that the outer roller body 11 can be deformed in its longitudinal direction so that the mandrel 19, the sealing film 18 pierces. In this case, the care roller 10 may be dimensioned so that this deformation must be made in order to use the care roller 10 in the floor care device. In this way, activation is mandatory at the first use.

reference numeral

1

robotic vacuum

2

casing

3

drive system

4

drive wheel

5

stabilizer

6

saugmund

7

dust cassette

8th

aspirator

10

(Floor) care roller

11

outer roller body

12

drilling

13

nonwoven layer

14

membrane

15

inner roller body

16

drilling

17

pivot

18

sealing film

19

mandrel

20

(Soil) care liquid

21

water level

Claims (14)

A self-propelled floor care appliance for automated floor care, comprising a drive system (3) for moving the floor care device over the floor surface to be maintained and a device control controlling the floor care device along a driveway, and a floor care roller (10) containing rotatable floor care fluid (20) Applying the floor care liquid (20) to the floor area to be cared for, characterized in that
the floor care roller (10) has an outer hollow roller body (11) in which an inner hollow roller body (15) for receiving the floor care fluid (20) is moved relative to the outer roller body (11), the inner roller body (15) being dependent on its position relative to the outer roller body (11) is sealed so that leakage of soil care fluid (20) from the inner roller body (15) is prevented. Self-propelled ground care device according to claim 1, wherein in a lateral surface of the outer roller body (11) and in a lateral surface of the inner roller body (15) bores (12, 16) are present, in a position of the inner roller body (15) relative to the outer Roll body (11) are not positioned congruent to each other and are positioned in a different position at least partially congruent to each other. Self-propelled ground care device according to claim 1 or 2, wherein the inner roller body (15) relative to the outer roller body (11) along its longitudinal axis displaceable in the outer roller body (11) is arranged. Self-propelled ground care device according to one of claims 1 to 3, wherein the inner roller body (15) relative to the outer roller body (11) is rotatably arranged in the outer roller body (11). Self-propelled ground care device according to one of claims 1 to 4, wherein the inner roller body (15) accessible from the outside manually in relation to the outer roller body (11) is variable in position. Self-propelled ground care device according to claim 5, wherein the inner roller body (15) for changing its position with at least one outwardly projecting bearing pin (17), which is suitable for rotatably supporting the floor care roller, coupled. Self-propelled floor care appliance according to one of claims 1 to 6, in which a drive for rotating the floor care roller (10) acts on the inner roller body (15). Self-propelled ground care device according to claim 7, wherein the inner roller body (15) with at least one outwardly projecting bearing pin (17) and / or an outer end surface is rotatably coupled, wherein the drive on the bearing pin (17) and / or the outer end face acts , Floor care appliance according to claim 1, wherein the inner roller body (15) is sealed in at least one area with a pierceable sealing film (18). Self-propelled ground care device according to claim 9, in which a mandrel (19) is arranged in the interior of the outer roller body (11), which is suitable for piercing the sealing film (18) when the inner roller body (15) moves. Self-propelled ground care device according to one of claims 1 to 10, wherein the outer roller body (11) is formed so that soil care fluid (20) only emerges from the roller body (11) when it is rotated. Self-propelled ground care device according to claim 11, wherein in a lateral surface of the outer roller body (11) arranged holes (12) on at least one side of a membrane (14), preferably made of a synthetic material, covered. Self-propelled floor care appliance according to claim 11, in which bores (12) arranged in a lateral surface of the outer roller body (11) are closed by a respective fiber plug (18) which preferably contains polyester fibers. Self-propelled ground care device according to one of claims 1 to 14, wherein on the outer roller body (11) an absorbent layer, preferably a nonwoven layer (13), for applying the floor care fluid (20) can be fixed.

Images