EP4186406B1 - Floor cleaning machine with bar device - Google Patents

Description

The invention relates to a floor cleaning machine which is hand-guided and/or hand-held, comprising a carrier device, at least one cleaning roller which is arranged on the carrier device, can be driven in rotation and is provided with a trim, a blower device for generating a suction flow, and a suction channel device for the suction flow, which provides at least one suction channel with a fluid-effective connection between the blower device and the at least one cleaning roller, wherein the at least one suction channel has at least one mouth towards the at least one cleaning roller and the at least one mouth has a first mouth wall and a spaced-apart second mouth wall, between which a mouth opening is formed, wherein when at least one cleaning roller is placed on a floor to be cleaned, the first mouth wall is positioned above the second mouth wall with respect to the direction of gravity.

From the WO 2010/140967 A1 is an arrangement for cleaning a dirty surface.

From the EP 2 177 128 A1 A brush arrangement for a floor cleaning device is known.

From the FR 2 797 895 A1 A cylindrical brush is known.

From the US 2002/0194692 A1 is a floor cleaning machine with a dispenser for cleaning fluid.

From the CH 607 578 A brush device that can be connected to a water pipe is known in which a brush roller that is permeable to water in the casing area is rotatably mounted on a perforated hollow shaft that can be fed with water.

From the DE 41 17 957 A1 A device for treating a surface is known which has a wiping device with a rag-like wiping element that can be guided over the surface to be cleaned, a moistening device for moistening the wiping element and a suction device for suctioning the wiping element. A floor cleaning machine according to the preamble of claim 1 is known from US20060236494 A1 known.

The invention is based on the object of providing a floor cleaning machine of the type mentioned above, which delivers an optimized cleaning result while being easy to handle.

This object is achieved according to the invention in that the first mouth wall and/or the second mouth wall rests against the trim of the at least one cleaning roller or projects into it, that a user holding unit is arranged on the carrier device, which comprises a rod device on which a handle is located, and that at least one cleaning liquid container is arranged on the user holding unit, which is in fluid connection with the at least one cleaning roller.

The fact that at least one outlet wall rests against the trim of the at least one cleaning roller or protrudes into it (i.e. dips into it) results in an optimized suction result. The at least one cleaning roller is guided past the at least one outlet, at which a negative pressure is applied, i.e. a suction flow is generated, and dirt can be sucked in.

In particular, a front side of the first mouth wall and/or a front side of the second mouth wall is at least approximately parallel to a rotation axis of the at least one cleaning roller. This results in effective suction. A wiping function with suction can be implemented.

In principle, the first mouth wall can rest against the trim or protrude into it and the second mouth wall can rest against the trim of the at least one cleaning roller or be spaced apart from it or protrude into it or, if the second mouth wall rests against the trim or protrudes into it, the first mouth wall can rest against the trim or protrude into it or be spaced apart. In particular, the first mouth wall rests against the trim or protrudes into it and a direction of rotation of the at least one cleaning roller is such that first a certain point of the at least one cleaning roller is guided past the second mouth wall and then past the first mouth wall. If the second mouth wall rests against the trim or protrudes into it, a direction of rotation is in particular such that a certain point of the at least one cleaning roller is guided past the first mouth wall and then past the second mouth wall.

In one embodiment, a contact element is arranged on the mouth, which rests on the trimmings or projects into them, and which projects transversely away from the first mouth wall or the second mouth wall, with a fluid seal between the contact element and the corresponding mouth wall. The contact element increases the area of contact or projection into the trimmings and a higher fluid tightness is achieved, which in turn improves the suction. The contact element forms (in cross section) a type of beak, which projects away from the first mouth wall or the second mouth wall. The at least one cleaning roller is guided past the contact element during rotation.

In one embodiment, the contact element is located on the first mouth wall. This makes it easy to achieve an improved suction effect. A fluid-tight seal between the contact element and the mouth can be easily achieved.

It is advantageous if the contact element facing the at least one cleaning roller has a curved contour that is adapted to the at least one cleaning roller. In particular, the contour has a circular contour that is adapted to a corresponding circular contour of the at least one cleaning roller, at least with respect to an envelope. This minimizes the frictional resistance caused by the at least one cleaning roller rotating past the contact element.

The contact element has a first end which is spaced from the mouth and has a second end which is positioned at the mouth, wherein the contact element is advantageously designed such that a negative pressure that arises at the first end is smaller than at the second end. This reduces the risk of a "fluid short circuit" through which fluid and in particular liquid could be sucked out in the area of the first end. This improves the cleaning result.

For example, a design for reducing the negative pressure that develops at the first end compared to the second end can be such that the contact element is made sufficiently long, whereby an increased friction surface is then provided. In one embodiment, the contact element has a first region with the first end and a second region with the second end, whereby a distance of the contact element at the first region to a rotation axis of the at least one cleaning roller is greater than at the second region. This allows the negative pressure that develops in the region of the first end to be reduced compared to the region at the second end and the risk of a liquid short circuit is reduced. This design can be achieved in a simple manner by a corresponding surface design of the contact element facing the at least one cleaning roller. For example, the contact element is designed in a step-like manner on the corresponding surface, with the step in particular having a smooth course (without sharp edges).

It is advantageous if the second mouth wall is arranged in front of the first mouth wall in relation to a direction of rotation of the at least one cleaning roller. A certain area on the cleaning roller is then guided past the second mouth wall and then the first mouth wall when the cleaning roller rotates. This results in effective suction and ease of use. This embodiment results in a short path for supplying dirt particles adhering to the trim to the mouth. In addition, this direction of rotation is advantageous when cleaning from a room using the corresponding floor cleaning machine.

In one embodiment, a distance between a front side of the first mouth wall and a rotation axis of the at least one cleaning roller is smaller than a distance between a front side of the second mouth wall and the rotation axis.

It is advantageous if the mouth opening of at least one mouth has at least an approximately rectangular cross-section. This allows the cleaning roller to be vacuumed from the outside over a large area and results in effective dirt extraction.

It is then appropriate if the at least one suction channel is tapered towards a separator device. This means that a type of funnel is arranged on the suction channel in order to enable effective dirt extraction from the cleaning roller. A large cross-sectional area can be provided at the mouth and in the further course of the at least one suction channel up to the taper, which is aerodynamically favorable. The flow velocity can be increased by tapering near the separator.

At least one cleaning fluid container is provided, which is in fluid connection with the at least one cleaning roller, wherein cleaning fluid is provided on the at least one cleaning roller. This allows the cleaning roller and in particular its coating to be moistened and a wiping function to be implemented with the floor cleaning machine. The appropriate cleaning fluid is provided via the cleaning fluid container. The cleaning fluid container is arranged on the floor cleaning machine in particular in a removable manner.

The at least one cleaning fluid container is arranged on the user holding unit. It can thus be effectively positioned on the floor cleaning machine and positioned above the at least one cleaning roller with respect to the direction of gravity.

It is advantageous if the blower device is arranged on the support device and/or the suction channel device is arranged on the support device. This results in a simple structural design.

In one embodiment, the suction channel device comprises a housing in which the at least one suction channel is arranged or formed. The housing can be used, for example, to accommodate a dirty liquid container and/or a separator device. It can also be used, for example, to accommodate a battery device and in particular a rechargeable battery device.

It is advantageous if an elastic device is provided, by means of which the suction channel device is pressed elastically against the at least one cleaning roller, wherein the elastic device in particular comprises a spring device is or comprises. This makes it easy to ensure that the first and/or second mouth wall rests against the trim of the at least one cleaning roller or is pressed into it. This corresponding functionality is ensured even if the trim is worn away, at least up to a certain threshold.

In one embodiment, the elastic device is supported on the carrier device via a first side. The carrier device then forms a mounting surface for the elastic device.

It is also possible for the elastic device to be supported on a first side on the blower device or a separator device. The blower device or separator device then forms a mounting surface for the elastic device.

In one embodiment, the elastic device is supported on the suction channel device via a second side. This exerts a corresponding pre-tensioning force directly on the suction channel device, which presses it with the first mouth wall against the trim.

It is also possible for the elastic device to be supported on a second side by the blower device or the separator device, whereby the blower device or the separator device is connected to the suction channel device, whereby the connection is a direct connection or a frictional connection. The suction channel device is then pressed against the trimmings directly or by frictional connection via the blower device or the separator device.

It is advantageous if a dirty liquid container is provided which is associated with a separator device. This allows dirty cleaning liquid to be collected. At a separator device, air is separated from liquid and solid components in a suction flow.

It is advantageous if the dirty liquid container is arranged on the suction channel device. This results in a compact structure and flow paths can be minimized.

The user holding unit is arranged on the carrier device and is pivotably mounted on a joint. An operator can then operate the floor cleaning machine easily and, for example, operate it with one hand. He can push or pull it and, in doing so, work on a larger floor area while minimizing changes of location.

For example, a pivot axis of the joint is parallel to a rotation axis of the at least one cleaning roller. This makes it easy to use.

The user holding unit comprises a rod device with a rod on which a handle is located. This results in a compact design and easy operation.

It is advantageous if, during a cleaning process, the floor cleaning machine is only supported on the floor by the at least one cleaning roller and is particularly characterized by a design without support wheels. This results in a compact structure. The entire weight of the floor cleaning machine can be supported by the at least one cleaning roller. A design without support wheels prevents abrasion marks on the floor to be cleaned.

It is advantageous if the direction of rotation of the at least one cleaning roller is from a line of contact with the floor to be cleaned towards the second mouth wall and then towards the first mouth wall and in particular the direction of rotation is clockwise when the at least one cleaning roller is placed on the floor. This allows a effective operation in which the floor cleaning machine is led out of a room to be cleaned.

It is particularly advantageous if the at least one cleaning roller is provided with grooves for generating air pulses in a suction flow. Short air pulses can be generated by means of grooves and in particular spaced-apart grooves which are rotated through the mouth at which the suction flow is present. Dirt which has adhered to the trim and in particular textile trim of the cleaning roller can be carried along by these. This enables an effective cleaning effect to be achieved.

A groove is formed in particular by a region free of or with reduced amounts of debris in order to be able to cause corresponding air pulses in the suction flow. A groove can basically have any shape, such as a slot or a cylinder.

In particular, a plurality of spaced grooves are provided, which are spaced apart in an axial direction of the at least one cleaning roller and a circumferential direction of the at least one cleaning roller. By means of a corresponding arrangement, dead areas on the at least one cleaning roller can be prevented and adhering dirt particles are effectively entrained essentially over the entire effective surface of the at least one cleaning roller. A groove can, for example, have a rectangular cross-section or a circular cross-section. Other groove shapes are also possible.

For example, a groove (particularly with a rectangular cross-section) has a length that is at most 10% of an axial length of the at least one cleaning roller.

Furthermore, it is advantageous, for example, if a groove (particularly in the case of a rectangular cross-section) has a width which is at most 5% of a circumferential length of the at least one cleaning roller.

In one embodiment, at least one sweeping lip is arranged on the suction channel device. The at least one sweeping lip can be used to implement a sweeping function in addition to the wiping function of the floor cleaning machine. By arranging it on the suction channel device, for example, coarse dirt on the floor that cannot be directly picked up by the wiping function of the at least one cleaning roller can be taken along by the at least one cleaning roller in an area between the at least one sweeping lip and the at least one cleaning roller and fed to the mouth with the suction flow.

In particular, the at least one sweeping lip is arranged and designed in such a way that coarse dirt between the at least one sweeping lip and the at least one cleaning roller is taken along by the at least one cleaning roller and fed to the at least one opening. This also allows coarse dirt to be vacuumed away.

Advantageously, the at least one sweeping lip separates a space behind the at least one cleaning roller and below the suction channel device towards the floor to be cleaned from the at least one cleaning roller when the at least one cleaning roller is placed on the floor. This allows a sweeping function to be implemented and coarse dirt to be taken along and removed.

It is advantageous if the at least one sweeping lip is arranged and/or designed to be movable and, in particular, is designed to be elastic. This allows it to be placed effectively on the floor to be cleaned in order to remove coarse dirt.

It is particularly advantageous if an air supply device is provided, through which air is provided to the at least one cleaning roller. In particular, if a sweeping lip is present, the suction power may no longer be sufficient due to insufficient air supply to the mouth.

The air supply device ensures that there is sufficient air supply to enable effective extraction even when a sweeping lip is present.

The supply air device comprises at least one channel with an outlet-side opening for supply air, which is directed towards the at least one cleaning roller, wherein in particular the at least one channel for supply air is arranged or formed on the suction channel device. In this way, supply air is supplied to the opening for the suction flow in a relatively direct manner in order to enable effective suction.

In particular, the at least one outlet-side opening for supply air is arranged between the at least one opening for the suction flow and the at least one sweeping lip. This results in effective suction even when a sweeping function is implemented.

It is also advantageous if the at least one channel has at least one inlet for supply air, via which supply air can be coupled in. This supply air is taken from the environment, for example, or it is process exhaust air or exhaust air from the blower device.

In one embodiment, the at least one inlet-side opening is arranged on an underside of the suction channel device and in particular is arranged on or near an end of the suction channel device associated with the at least one cleaning roller. This allows a supply of fresh air to be achieved with a simple structural design.

In a further embodiment, the at least one channel is guided along the suction channel device. This allows supply air to be provided, for example, by the blower device.

In particular, the at least one channel is then led to the blower device. For example, exhaust air from the blower device or cooling air from the blower device can then be used as supply air.

Figur 1

eine perspektivische Ansicht eines Ausführungsbeispiels einer erfindungsgemäßen Bodenreinigungsmaschine;

Figur 2

eine andere perspektivische Ansicht der Bodenreinigungsmaschine gemäß Figur 1;

Figur 3

eine Teilseitenansicht der Bodenreinigungsmaschine gemäß Figur 1 in der Richtung A;

Figur 4

eine Schnittansicht in einer Ebene parallel zur Zeichenebene gemäß Figur 3;

Figur 5(a)

eine vergrößerte Darstellung eines Bereichs an einer Reinigungswalze gemäß Figur 3;

Figur 5(b)

eine schematische Darstellung eines Anpressdrucks der Reinigungswalze auf einen zu reinigenden Boden in Abhängigkeit eines Drehwinkels;

Figur 6

eine schematische Darstellung eines ersten Ausführungsbeispiels einer elastischen Einrichtung;

Figur 7

eine schematische Darstellung eines zweiten Ausführungsbeispiels einer elastischen Einrichtung;

Figur 8

eine schematische Darstellung eines dritten Ausführungsbeispiels einer elastischen Einrichtung;

Figur 9

eine vergrößerte Darstellung eines Bereichs an der Reinigungswalze gemäß Figur 4;

Figur 10

eine Variante einer Bodenreinigungsmaschine in einer Teildarstellung ähnlich wie Figur 9;

Figur 11

eine Ansicht ähnlich wie Figur 5(a) bei einem weiteren Ausführungsbeispiel;

Figur 12

eine Draufsicht auf einen Teil der Bodenreinigungsmaschine gemäß Figur 1 in der Richtung B;

Figur 13

eine Schnittansicht längs der Linie 13-13 gemäß Figur 12;

Figur 14

eine vergrößerte Darstellung des Bereichs C gemäß Figur 9 bei einer Variante eines Ausführungsbeispiels;

Figur 15

eine ähnliche Darstellung wie in Figur 14 bei einer weiteren Variante; und

Figur 16

eine ähnliche Darstellung wie Figur 16 bei einer weiteren Variante.

The following description of preferred embodiments serves to explain the invention in more detail in conjunction with the drawings. They show:

Figure 1

a perspective view of an embodiment of a floor cleaning machine according to the invention;

Figure 2

another perspective view of the floor cleaning machine according to Figure 1 ;

Figure 3

a partial side view of the floor cleaning machine according to Figure 1 in direction A;

Figure 4

a sectional view in a plane parallel to the drawing plane according to Figure 3 ;

Figure 5(a)

an enlarged view of an area on a cleaning roller according to Figure 3 ;

Figure 5(b)

a schematic representation of a contact pressure of the cleaning roller on a floor to be cleaned as a function of an angle of rotation;

Figure 6

a schematic representation of a first embodiment of an elastic device;

Figure 7

a schematic representation of a second embodiment of an elastic device;

Figure 8

a schematic representation of a third embodiment of an elastic device;

Figure 9

an enlarged view of an area on the cleaning roller according to Figure 4 ;

Figure 10

a variant of a floor cleaning machine in a partial representation similar to Figure 9 ;

Figure 11

a view similar to Figure 5(a) in a further embodiment;

Figure 12

a plan view of a part of the floor cleaning machine according to Figure 1 in direction B;

Figure 13

a sectional view along the line 13-13 according to Figure 12 ;

Figure 14

an enlarged view of area C according to Figure 9 in a variant of an embodiment;

Figure 15

a similar representation as in Figure 14 in another variant; and

Figure 16

a similar representation as Figure 16 in another variant.

An example of a floor cleaning machine as shown in the Figures 1 and 2 shown in an overall view and designated there with 10, is a hand-guided and hand-held floor cleaning machine. This comprises a carrier device 12. The carrier device 12 is designed as a frame 14.

This frame 14 has a first frame rod 16 and a second frame rod 18. The second frame rod 18 is oriented transversely and in particular perpendicularly to the first frame rod 16 and is fixed to the first frame rod 16.

The first frame rod 16 and the second frame rod 18 span a plane. An element 20 is located on the first frame rod 16 and projects beyond this plane. The element 20 holds a joint 22 on which a rod device 24 is located. In the embodiment shown, the rod device 24 comprises a single rod.

The rod device 24 is held on the support device 12 via the joint 22 so that it can pivot about a pivot axis 26. The pivot axis 26 is at least approximately parallel to the first frame rod 16.

At one end of the rod device 24, which is opposite the end by which the rod device 24 is fixed to the joint 22, there is a handle 28. In one embodiment, the handle 28 comprises a closed bracket 30. It further comprises a grip element 32 at a distance from the bracket 30.

One or more switches 34 for switching a cleaning operation of the floor cleaning machine 10 on or off are located on the handle 28.

The rod device 24 with the handle 28 forms a user holding unit, via which a user can hold and guide the floor cleaning machine 10. The rod device 24 has such a length that a standing user of the floor cleaning machine 10, who is standing on the floor to be cleaned, can guide and operate the machine without having to bend down.

In one embodiment, the rod device 24 is designed such that its length and in particular the distance of the handle 28 to the joint 22 is lockably adjustable. This makes it possible to adapt to different users.

A cleaning roller 36 is located on the second joint rod 18 in the area of a front end of the carrier device 12. The cleaning roller 36 can be driven to rotate about a rotation axis 38. For this purpose, for example, a drive is provided which is positioned in an interior of the cleaning roller 36.

The rotation axis 38 is in particular parallel to the pivot axis 26.

A blower device 40 is also located on the carrier device 12. The blower device 40 generates a suction flow. A suction channel device 42 is arranged on the carrier device 12 between the blower device 40 in the cleaning roller 36. The suction channel device 24 provides a fluid-effective connection between the cleaning roller 36 and the blower device 40 in order to be able to discharge the suction flow generated by the blower device 40 away from the cleaning roller 36.

The blower device 40 is assigned a drive 44 and in particular an electric motor drive 44. This is also positioned on the carrier device 12.

The blower device 40 is assigned a separator device 46, by means of which an air portion can be separated from a residual portion (liquid with dirt particles) in the suction flow. The separator device 46 is connected upstream of the blower device 40 in the suction flow. It is positioned in particular on the suction channel device 42.

The separator device 46 is in turn associated with a dirty liquid container 48 in which dirty liquid can be collected. The Dirty liquid container 48 is in particular removably arranged on the carrier device 12 and in particular the suction channel device 42, so that it can be easily emptied and/or cleaned.

To clean a floor 50, the cleaning roller 36 is moistened. The floor cleaning machine 10 comprises a cleaning liquid container 52. In one embodiment, the cleaning liquid container 52 is arranged on the rod device 24 and is arranged in a removable manner, in particular for refilling. One or more liquid lines 53 lead from the cleaning container 52 to the cleaning roller 36.

The suction channel device 42 is the "mediating" unit between the blower device 40 and the cleaning roller 36. The suction flow is passed through it in order to carry out a separation in the separator device 46 and to separate an air portion from a residual portion. The suction flow basically contains air as a "carrier medium", with the corresponding negative pressure flow being produced by the blower device 40, and a liquid portion and a solid portion. The cleaning roller 36 is moistened using cleaning liquid (in particular water, possibly with additives) from the cleaning container 52, as will be explained in more detail below. This allows cleaning liquid to be applied to the floor 50 to be cleaned and dirt adhering to the floor can be softened. Liquid and dissolved dirt or undissolved dirt particles are sucked in and fed through the suction channel device 42 to the separator device 46.

The cleaning roller 36 comprises (see for example Figure 9 ) a hollow roller 54 with an interior 56. On the hollow roller 54 there is a trimming 58, in particular made of a textile material.

In one embodiment, the cleaning roller 36 is moistened internally.

Cleaning fluid is supplied to the interior 56 of the hollow roller 44 via the line 53. The hollow roller 54 is provided with corresponding openings to the trimmings 58. This allows cleaning fluid to escape and moisten the trimmings 58 and in turn be applied to the floor 50.

Furthermore, the cleaning roller 52 can be placed and in particular pushed onto a rotating shaft which is located on the carrier device 12 via the hollow roller 54 with the interior 56. The cleaning roller 36 can be fixed to this shaft in a rotationally fixed manner.

The suction channel device 42 comprises at least one suction channel 60 (cf. Figure 9 ). This suction channel 60 is arranged in the suction channel device 42 and leads from the cleaning roller 36 to the blower device 40.

In one embodiment, the blower device 40 with drive 44 is firmly attached to the carrier device 12 and in particular to the first frame rod 16. A drive 62 for the cleaning roller 36 is firmly fixed to the second articulated rod 18. In particular, a gear for transmitting torque to the shaft for the cleaning roller 36 is arranged in the second articulated rod 18.

In this embodiment, the drive 62 and the blower device 40 with drive motor 44 form a unit which is firmly attached to the carrier device 12.

From the suction duct device 42, starting from an air side of the separator device 46, a pipe 64 leads from a connection 66 on the suction duct device 42 to a corresponding connection of the blower device 40. Pipe bends 68a and 68b are located on the pipe 64. The pipe 64 and the pipe bends 68a, 68b are arranged outside the suction channel device 42 and the blower device 40. They are arranged, for example, on a side opposite the drive 62.

In one embodiment, the suction channel device 42 is designed as a housing 70. The at least one suction channel 60 can be arranged in a protected manner in this housing 70. Furthermore, the dirty liquid container 48 and the separator device 46 can be positioned in a protected manner in the housing.

The suction channel 60 has an opening 72 (see, for example, the Figures 4 and 9 ) which is open towards the cleaning roller 36. The cleaning roller 36 is suctioned off on an outside via this mouth 72 and the suction flow is coupled into the suction channel 60 and thus into the suction channel device 42. The mouth 72 comprises a first mouth wall 74 and a second mouth wall 76. A mouth opening 78 is formed between the first mouth wall 74 and the second mouth wall 76. The first mouth wall 74 is an upper mouth wall with respect to the second mouth wall 76. When the cleaning roller 36 is placed on the floor 50 to be cleaned for a cleaning process, the first mouth wall 74 lies above the second mouth wall 76 with respect to the direction of gravity.

Between the first mouth wall 74 and the second mouth wall 76 there are spaced transverse walls 75a, 75b.

The first mouth wall 74 has a front side 80a. The second mouth wall has a front side 80b (cf. Figure 9 ). The end faces 80a and 80b are at least approximately straight and parallel to one another. In particular, the end faces 80a and 80b are parallel to the axis of rotation 38.

The mouth opening 78 has a rectangular cross-section and preferably extends over the entire length of the cleaning roller 36, on which a trim 58 is arranged. A height of the mouth opening 78 (the distance between the first mouth wall 74 and the second mouth wall 76 at the mouth opening 78) is smaller than a diameter of the cleaning roller 36 and is, for example, at most 10% of the diameter of the cleaning roller 36.

The mouth opening 78 is arranged in a fourth quadrant 82 with respect to the cleaning roller 36 when the floor cleaning machine 10 is placed on the floor 50 in an operative mode and is supported by the cleaning roller 36, and a coordinate system is defined accordingly, which has axes parallel and perpendicular to the floor 50 and in which the center runs through the point of intersection of the axis of rotation 38.

The first mouth wall 74 rests against the trim 58 of the cleaning roller 36 or projects into it. Figures 3 and 9 an embodiment is shown in which the first mouth wall 74 projects into the trim 58.

The front side 80a of the first mouth wall 74 lies on the trim 58 or is immersed in the trim 58 ( Figures 4 and 9 ).

In the embodiment shown, the second mouth wall 76 rests against the trim 58; the front side 80b touches the trim 58 without protruding into it. In principle, it is also possible as an alternative for the mouth opening 78 to be set back with respect to the front side 80b opposite the cleaning roller 36 with the trim 58, i.e. that the front side 80b is spaced apart from the trim 58 or protrudes into the trim 58.

The suction channel 60 leads from the mouth 72 to the connection 66.

In one embodiment ( Figures 14 to 16 ), a contact element 200 is arranged at the mouth 72. In one embodiment, this contact element 200 is arranged on the first mouth wall 74, whereby a fluid tightness is established between the first mouth wall 74 and the contact element 200. The contact element 200 points transversely away from the first mouth wall 74.

The contact element 200 projects into the trim 58 of the cleaning roller 36. It dips into the trim 58 with a lower region.

In the system element 200, the immersion area is a partial area of the system element 200.

A contour 202 of the contact element 200 is adapted to the cleaning roller 36. In particular, the contour 202, which faces the cleaning roller 36, is curved with the same curvature as the cleaning roller 36.

The contact element 200 ensures improved fluid coupling into the orifice 72.

In another embodiment ( Figure 15 ) a contact element 204 is provided which sits on the first mouth wall 74 and projects transversely away from it. This contact element 204 has a first end 206 which is spaced apart from the first mouth wall 74. It also has a second end 208 which lies on the mouth 72 and thus on the mouth wall 74. The contact element 204 extends between the first end 206 and the second end 208.

The contact element 204 is not uniformly high (in cross-section) between the first end 206 and the second end 208. It has a first region 210, at which the first end 206 is located. This first region 210 merges into a second region 212 and in particular is continuous , with the second end 208 lying in the second region 212. An underside 214 of the contact element 204 has a greater distance from the rotation axis 38 of the cleaning roller 36 in the first region 210 than in the second region 212.

Basically, there is a negative pressure at the contact element 200 or 204. Due to the formation with the first area 210 and the second area 212, the negative pressure in the area of the first end 206 is reduced compared to the negative pressure in the area of the second end 208. This improves the suction effect, since in particular the risk of a liquid short circuit (the pulling out of liquid in the area of the first end 206) is reduced.

Advantageously, the contact element 200 or the contact element 204 have a length (between the first end 206 and the second end 208) which is greater than a corresponding opening length of the mouth 72.

In another embodiment, which is shown in Figure 16 As shown schematically, a contact element 216 is arranged on the first mouth wall 74. This is completely immersed in the trim 58 of the cleaning roller 36.

This contact element 216 has a first region 220 at a first end 218 and a second end 222 at the first mouth wall 74, which is formed in a second region 224. In the first region 220, the contact element 216 facing the cleaning roller 36 has a greater distance from the axis of rotation 38 than in the second region 224.

In this embodiment, both the first region 220 and the second region 224 are completely immersed in the trim 58.

The suction channel 60 tapers in one area towards the separator device 46. This forms a type of funnel 83 on the separator device 46 in order to obtain effective suction over the entire length of the cleaning roller 36 and to increase the flow speed for entry into the separator device.

In one embodiment, the cleaning roller 36 is driven in a rotating manner with a direction of rotation 84. The rotation of the cleaning roller 36 and the operation of the blower device 40 are switched simultaneously via the switch 34. The corresponding drive 62 for the rotation of the cleaning roller 36 and the drive 44 receive their drive energy, for example, from a rechargeable battery device, which is arranged, for example, in the housing 70 of the suction channel device 42 (not shown in the figures), or from mains power.

The direction of rotation 84 is such that a contact line 86 ( Figure 5(a) ) of the cleaning roller 36 on the floor 50 rotates away from the floor 50 towards the mouth 72. The direction of rotation 84 is such that, with respect to this, the second mouth wall 76 lies in front of the first mouth wall 74.

The direction of rotation 84, when the cleaning roller 36 is placed on the floor 50 during proper operation, is a clockwise rotation for a user standing on the floor 50.

By arranging the mouth 72 in the fourth quadrant 82, dirt carried from the floor 50 is passed through the third quadrant 88 and fed to the mouth 72 in the fourth quadrant 82.

In an alternative embodiment, the direction of rotation is opposite to the direction of rotation 84, i.e. the rotation is counterclockwise In this embodiment, the second mouth wall 76 rests against the trim 58 or protrudes into it. The first mouth wall 74 can then rest against the trim 58, be spaced from it or protrude into it. In this embodiment, dirt is picked up, the cleaning roller 36 then rotates from the second quadrant into the first quadrant and from there into the fourth quadrant and the suction takes place at the mouth 72.

A rotation speed of the cleaning roller 36 is in particular in the range between approximately 200 revolutions per minute and 400 revolutions per minute. The contact weight on the cleaning roller 36 is, for example, in the order of approximately 6 kg.

In Figure 5(b) The diagram shows the course of a contact force for a cleaning roller 36 with textile trim 58 as a function of a rotational position. The angle of rotation 0 refers to the line 86 as shown in Figure 5(a) is shown. At the angle of rotation 0, it touches the floor 50. This is where the greatest contact pressure is present. This causes a large line pressure and thus the highest water concentration. Dirt on the floor 50 is softened accordingly. If the cleaning roller 36 is rotated further, the contact pressure and thus also the water concentration decreases. The floor 50 can then be dried further by the cleaning roller 36.

This makes it possible to operate the cleaning roller 36 at a relatively low speed. This supports the cleaning performance and the residual moisture on the floor can be kept to a minimum. The floor 50 is protected even if there is a lack of cleaning fluid, thus reducing the risk of burning.

The suction channel device 42 with the mouth 72 is connected via an elastic device 90 ( Figure 6 ) is pressed against the cleaning roller 36 and is thus kept pre-tensioned. In Figure 6 This is shown schematically. The elastic Device 90 is supported on a first side 92 on the carrier device 12 and on a second side 94 on the separator device 46. In the corresponding embodiment, the separator device 46 and the suction channel device 42 form a unit. The separator device 46 and the suction channel device 42 are directly connected to one another. As a result, the suction channel device 42 is then pressed against the cleaning roller 36 by the elastic device 90 supported on the carrier device 12.

This in Figure 6 The arrangement shown schematically corresponds to the arrangement of the floor cleaning machine 10 according to the Figures 1 and 2 .

The elastic device 90 is formed by a spring device, for example with one or more spiral springs or spiral springs. The corresponding elastic device 90 is supported on the blower device 40.

In an alternative embodiment ( Figure 7 ), the separator device 46 and the suction channel device 42 are separated. The elastic device 90 with one or more springs is supported on the blower device 40 via the first side 92. It is supported on the separator device 46 via the second side 94 and presses it in the direction of the cleaning roller 36 via a corresponding pre-tension. The separator device 46 and the suction channel device 42 are connected to one another, although the connection is not direct, but rather a frictional connection. The separator device 46 therefore acts with a corresponding contact force on the suction channel device 42 and presses it onto the cleaning roller 36.

In another embodiment ( Figure 8 ), the elastic device 90 is supported on the carrier device 12 (or the blower device 40 or the separator device 46) via the first side 92 and is supported directly on the suction channel device 42 via the second side 94 and presses it directly against the cleaning roller 36 in order to generate the corresponding pre-tension.

In one embodiment (in particular Figures 9 to 11 ) the cleaning roller 36 is assigned (at least) one sweeping lip 96. The sweeping lip 96 is seated in a holder 98 ( Figures 9 and 10 , the sweeping lip is not shown in these figures.) The floor cleaning machine 10 has a front end 100 on the cleaning roller 36. The sweeping lip 96 is arranged behind the cleaning roller 36 with respect to this front end 100. It is fixed to an underside of the suction channel device 42.

The sweeping lip 96 closes off a space 102 between a bottom side 104 of the suction channel device 42, which is opposite the first mouth wall 74, and the cleaning roller 36.

A normal operating mode of the floor cleaning machine 10 is that it is pushed, i.e. pushed forward. The corresponding direction is shown in Figure 1 shown by the arrow with the reference number 106. The sweeping lip 96 is designed in such a way that it rests on the floor 50 and coarse dirt is "swept up" in the process. This coarse dirt in a space 108 between the sweeping lip 96 and the cleaning roller 36 is taken along by the cleaning roller 36 with its direction of rotation 84 and fed to the mouth 72 and can be sucked off there. Coarse dirt can also be sucked off by the sweeping lip 96.

The sweeping lip 96 is in particular arranged to be movable and/or designed to be movable. This is shown in Figure 11 indicated by the arrow with the reference number 110. The movable design is achieved, for example, by a rubber design with a correspondingly elastic rubber material. Alternatively or additionally, the sweeping lip 96 can also be arranged so as to be movable, for example pivotable, and in particular can be arranged so as to be movable on the suction channel device 42. For example, the sweeping lip 96 is then made from a correspondingly hard rubber material.

In order to obtain an optimized suction at the mouth 72 even in the presence of a sweeping lip 96, the floor cleaning machine 10 has an air supply device 112 (see Figures 9 and 10 ). The air supply device 112 provides additional air supply to the cleaning roller 36 at or near the mouth 72 in order to enable optimized suction.

In one embodiment ( Figure 9 ), the supply air device comprises (at least) one duct 114, which is arranged in the extraction duct device 42. This duct 114 has an inlet-side opening 116 for coupling in supply air and an outlet-side opening 118 for coupling out supply air which was coupled in via the inlet-side opening 116.

The inlet-side opening 118 is arranged on the underside 104 of the suction channel device 42 at a distance from the cleaning roller 36. The outlet-side opening 118 points towards the cleaning roller 36. In relation to the direction of rotation 84, the outlet-side opening 118 is arranged in front of the opening 72.

The outlet-side orifice 118 is arranged in particular in the fourth quadrant 82. It is located near the orifice 72.

In one embodiment, the end face 80b of the second mouth wall 76 also forms an end face of a wall in which an orifice opening of the outlet-side mouth 118 is located.

Supply air can then be coupled in from the room 102 and fed to the cleaning roller 36.

In another embodiment ( Figure 10 ), the supply air device 112 has (at least) one duct 120, which is connected on the inlet side to a corresponding opening (in Figure 10 not shown) is coupled to the blower device 40. For example, cooling air or exhaust air of the blower device 40 is used as supply air and then fed by the blower device 40 through the channel 120 to the cleaning roller 36. The channel 120 then runs in particular along the suction channel device 42.

An outlet-side orifice 118 is basically arranged as described above in the embodiment according to Figure 9 described.

In one embodiment ( Figures 12 and 13 ), the cleaning roller 36 is provided with grooves 122. Such a groove is formed in the trim 58. A groove 122 is formed, for example, by being a recess in the trim 58, at which no trim is arranged or at which a height of the trim 58 above the hollow roller 54 is lower than outside the corresponding groove 122.

In the exemplary embodiment, the groove is shown with a rectangular cross-section. The corresponding groove as a recess in the trim 58 can also have a different shape. For example, it can have a circular cross-section or another cross-sectional shape.

Such a groove 122 then has a space 124.

The cleaning roller 36 has a plurality of grooves 122 which are spaced apart in an axial direction 126 (which is parallel to the axis of rotation 38) and spaced apart in the circumferential direction 128.

The cleaning roller 36 is structured by the grooves 122. When the cleaning roller 36 rotates, a short air pulse is generated at the individual grooves 122 as the suction flow passes through the mouth 72. This air pulse can carry away dirt that has become caught in the trim 58.

In particular, the grooves 122 are evenly distributed on the cleaning roller 36 with respect to the circumferential direction 128 and the axial direction 126 in order to to largely prevent dead zones with regard to the entrainment of dirt.

For example, in the case of a rectangular cross-section of a groove 122, a length of a groove 122 in the axial direction 126 is at most 10% of the length of the cleaning roller 36 with trimming 58 in this axial direction 126.

Furthermore, it is advantageous if, in the case of a rectangular cross-section of a groove 122, a width of a groove 122 in the circumferential direction 128 amounts to at most 5% of a total circumference of the cleaning roller 36 on a surface of the facing 58.

When the floor cleaning machine 10 is in operation, it is only supported on the cleaning roller 36. In particular, the floor cleaning machine 10 is designed without support wheels. This prevents abrasion marks caused by support wheels.

The floor cleaning machine 10 works as follows:
The floor cleaning machine 10 is operated during a cleaning process in such a way that a rotation of the cleaning roller 36 in the direction of rotation 84 is driven by a corresponding drive. The blower device 40 ensures a corresponding negative pressure to provide a suction flow.

The cleaning roller 36 is moistened from the inside with cleaning fluid from the cleaning fluid container 52, whereby the trimmings 58 are moistened. Suction takes place at the mouth 72 through the suction channel device 42 on an outside of the cleaning roller 36.

The speed of the cleaning roller 36 is set so that water droplets are largely prevented from being thrown off the cleaning roller 36.

The direction of rotation 84 is preferably directed towards an operator who holds the floor cleaning machine 10 on the user holding unit. This allows normal operation, in which cleaning is carried out from a room to be cleaned, to be carried out effectively.

The suction channel device 42 with the mouth 72 is pressed against the cleaning roller 36 by the elastic device 90 and in particular by spring force so that effective suction takes place. In particular, the first mouth wall 74 rests against the trimmings 58 or penetrates into it.

The sweeping lip 96 provides a sweeping function for particles that are not directly taken away by the cleaning roller 36. The cleaning roller 36 is a wiping roller. The sweeping lip 96 ensures that coarse dirt also reaches the mouth 72 by being taken along by the cleaning roller 36.

Basically, if the sweeping lip 96 rests against the floor 50 to be cleaned, the air supply to the outlet 72 is hindered. The air supply device 112 ensures a sufficient air supply. Air can then be supplied from the environment or process exhaust air or blower device exhaust air can be supplied. This in turn enables good coarse dirt collection with sufficient residual moisture value.

The cleaning roller 36 rests on the floor 50. The highest contact pressure prevails at a contact line and the largest amount of cleaning fluid is provided there, which in turn can soften dirt on the floor 50. The contact pressure outside of this contact line 86 is correspondingly lower and the cleaning fluid concentration is then also lower. The floor 50 can then be dried further via the cleaning roller 36.

During a cleaning process, the entire weight of the device rests on the cleaning roller 36.

The cleaning roller 36 is structured via the grooves 122. As a result, short air pulses are generated when the suction flow passes through the mouth 72 in order to be able to carry away dirt that has become caught on the trim 58.

List of reference symbols

10

Floor cleaning machine

12

Carrier device

14

frame

16

First frame bar

18

Second frame rod

20

element

22

joint

24

Rod device

26

Swivel axis

28

Handle

30

hanger

32

Handle element

34

Switch

36

Cleaning roller

38

Rotation axis

40

Blower device

42

Suction duct device

44

drive

46

Separator device

48

Dirty liquid container

50

Floor

52

Cleaning fluid container

54

Hollow roller

56

inner space

58

Stock

60

Suction channel

62

drive

64

Pipe

66

Connection

68a

Pipe bend

68b

Pipe bend

70

Housing

72

mouth

74

First mouth wall

75a

Cross wall

75b

Cross wall

76

Second muzzle wall

78

Muzzle opening

80a

Front side

80b

Front side

82

Fourth quadrant

83

funnel

84

Rotation direction

86

Line of contact

88

Third quadrant

90

Elastic device

92

First page

94

Second page

96

Sweeping lip

98

Recording

100

Front end

102

Space

104

bottom

106

Arrow

108

Space

110

Arrow

112

Supply air system

114

channel

116

Entrance side mouth

118

Outlet side mouth

120

channel

122

Groove

124

Space

126

Axial direction

128

Circumferential direction

200

Investment element

202

contour

204

Investment element

206

First end

208

Second End

210

First area

212

Second area

214

bottom

216

Investment element

218

First end

220

First area

222

Second End

224

Second area

Claims (16)

1. Floor cleaning machine which is hand-guided and/or hand-held, comprising a support device (12), at least one cleaning roller (36) which is arranged on the support device (12), is capable of being driven in rotation and is provided with a cleaning substrate (58), a fan device (40) for creating a suction flow, and a suction channel device (42) for the suction flow which provides at least one suction channel (60) operatively connected for fluid communication between the fan device (40) and the at least one cleaning roller (36), wherein the at least one suction channel (60) has at least one mouth (72) towards the at least one cleaning roller (36) and wherein the at least one mouth (72) comprises a first mouth wall (74) and a spaced second mouth wall (76) having a mouth opening (78) formed therebetween, wherein the first mouth wall (74) is positioned above the second mouth wall (76) relative to the direction of gravity (g) when the at least one cleaning roller (36) is placed on a floor (50) that is to be cleaned, wherein a user holding unit is arranged on the support device (12), characterized in that the first mouth wall (74) and/or the second mouth wall (76) is in contact against or protrudes into the cleaning substrate (58) of the at least one cleaning roller (36), wherein the user holding unit comprises a stick device (24) having a handle (28) located thereon, and in that arranged on the user holding unit is at least one cleaning liquid container (52) which is operatively connected for fluid communication with the at least one cleaning roller (36).
2. Floor cleaning machine in accordance with claim 1, characterized in that an end face (80a) of the first mouth wall (74) and/or an end face (80b) of the second mouth wall (76) is at least approximately parallel to an axis of rotation (38) of the at least one cleaning roller (36).
3. Floor cleaning machine in accordance with claim 1 or 2, characterized in that the first mouth wall (74) is in contact against the cleaning substrate (58) or protrudes thereinto and the second mouth wall (76) is in contact against the cleaning substrate (56) of the at least one cleaning roller (36) or is spaced apart therefrom or protrudes thereinto, or in that the second mouth wall (76) is in contact against the cleaning substrate (56) or protrudes thereinto and the first mouth wall (74) is in contact against the cleaning substrate (56), is spaced apart therefrom or protrudes thereinto.
4. Floor cleaning machine in accordance with any one of the preceding claims, characterized in that the mouth (72) has arranged thereat a contact element (200; 204; 216) which is in contact against or protrudes into the cleaning substrate (58) and projects transversely away from the first mouth wall (74) or the second mouth wall (76), wherein a fluid seal is present between the contact element (200; 204; 216) and the corresponding mouth wall (74; 76), in particular with at least one of the following:

   - the contact element (200; 204; 216) is located at the first mouth wall (74);

   - the contact element (200; 204; 216) has, on a side thereof facing towards the at least one cleaning roller (36), a curved contour which is adapted to the at least one cleaning roller (36);

   - the contact element (204; 216) has a first end (206; 218) which is spaced from the mouth (72) and has a second end (208; 222) which is positioned at the mouth (72), and the contact element (204; 216) is configured such that a resultant negative pressure is less at the first end (206; 218) than at the second end (208; 222), in particular wherein the contact element (204; 216) has a first area (210; 220) comprising the first end (206; 218) and has a second area (212; 224) comprising the second end (208; 222), wherein a distance of the contact element (204; 216) from an axis of rotation (38) of the at least one cleaning roller (36) is larger at the first area (210; 220) than at the second area (212; 224).
5. Floor cleaning machine in accordance with any one of the preceding claims, characterized in that the second mouth wall (76) is arranged upstream of the first mouth wall (74) with respect to a direction of rotation (84) of the at least one cleaning roller (36).
6. Floor cleaning machine in accordance with any one of the preceding claims, characterized in that a distance of an end face (80a) of the first mouth wall (74) from an axis of rotation (84) of the at least one cleaning roller (36) is less than a distance of an end face (80b) of the second mouth wall (76) from said axis of rotation (84).
7. Floor cleaning machine in accordance with any one of the preceding claims, characterized in that the mouth opening (78) of the at least one mouth (72) is at least approximately rectangular in cross-section.
8. Floor cleaning machine in accordance with any one of the preceding claims, characterized in that the at least one suction channel (60) has a configuration that tapers in cross-section towards a separator device (46).
9. Floor cleaning machine in accordance with any one of the preceding claims, characterized in that the fan device (40) is arranged on the support device (12) and/or in that the suction channel device (42) is arranged on the support device (12).
10. Floor cleaning machine in accordance with any one of the preceding claims, characterized in that the suction channel device (42) comprises a housing (70) in which the at least one suction channel (60) is arranged or formed.
11. Floor cleaning machine in accordance with any one of the preceding claims, characterized by a dirty liquid container (48) that is associated with a separator device (46), and in particular
    characterized in that the dirty liquid container (48) is arranged at the suction channel device (42).
12. Floor cleaning machine in accordance with any one of the preceding claims, characterized in that the user holding unit is arranged for pivotal movement about a joint (22) on the support device (12) and in particular
    characterized in that a pivot axis (26) of the joint (22) is oriented parallel to an axis of rotation (38) of the at least one cleaning roller (36).
13. Floor cleaning machine in accordance with any one of the preceding claims, characterized in that a direction of rotation (84) of the at least one cleaning roller (36) is from a line of contact (86) with the floor (50) to be cleaned towards the second mouth wall (76) and then towards the first mouth wall (74), and in particular in that the direction of rotation (84) is clockwise when the at least one cleaning roller (36) is placed on the floor (50).
14. Floor cleaning machine in accordance with any one of the preceding claims, characterized in that at least one sweeping lip (96) is arranged at the suction channel device (42).
15. Floor cleaning machine in accordance with claim 14, characterized by at least one of the following:

    - the at least one sweeping lip (96) is arranged and configured such that coarse dirt between the at least one sweeping lip (96) and the at least one cleaning roller (36) is picked up by the at least one cleaning roller (36) and delivered to the at least one mouth (72);

    - the at least one sweeping lip (96) isolates a space (102) behind the at least one cleaning roller (36) and below the suction channel device (42) towards the floor (50) to be cleaned from the at least one cleaning roller (36) when the at least one cleaning roller (36) is placed against the floor (50);

    - the at least one sweeping lip (96) is movably arranged and/or movably configured and is in particular elastically configured;

    - the sweeping lip (96) is arranged behind the at least one cleaning roller (36) with respect to a front end (100) of the support device (12);

    - in a cleaning operation, the sweeping lip (96) is in contact against the floor (50).
16. Floor cleaning machine in accordance with claim 14 or 15, characterized by a supplementary air device (112) by way of which a supply of supplementary air is provided to the at least one cleaning roller (36), in particular with at least one of the following:

    - the supplementary air device comprises at least one channel (114; 120) having at least one outlet-side mouth (118) for supplementary air that is oriented towards the at least one cleaning roller (36), in particular wherein the at least one channel (114; 120) for supplementary air is arranged or formed at the suction channel device (42), and the at least one outlet-side mouth (118) for supplementary air is preferably arranged between the at least one mouth (72) for suction flow and the at least one sweeping lip (96);

    - the at least one channel (114; 120) has at least one inlet-side mouth (116) for supplementary air via which supplementary air is capable of being coupled in, in particular wherein the at least one inlet-side mouth (116) is arranged on an underside (104) of the suction channel device (42) and is in particular arranged at or near an end of the suction channel device (42) that is associated with the at least one cleaning roller (36);

    - the at least one channel (120) is routed along the suction channel device (42) and/or the at least one channel (120) is routed to the fan device (40).

Images