EP2063755B1 - Portable domestic floor wet cleaning device and dampening device for a wiping roller - Google Patents

Description

The invention relates to a movable household floor cleaning device according to the features of the preamble of claim 1.

Floor cleaning devices of the type in question are known among other things also for the household sector. Such in question household appliances have a cleaning serving, rotating wiping roller over which the processing of the care or to be cleaned soil is achieved.

From the US 2001/00422828 A1 a household floor cleaning device is known which has two spaced in the direction of travel wiping rollers, which can be blocked depending on the direction of travel. In case of blockage, the device must be moved against both blocked wiping rollers. It can also be both rolls are raised at the same time, but then none of the rollers is in contact with the ground.

Based on the stated prior art, the invention is concerned with the task of providing a household floor cleaning device that can be handled conveniently by forming a wiper edge by a lockable roller.

This object is achieved in the subject matter of claim 1, wherein it is geared to that in the direction of travel not blocked wiping roller is raised in a vertically spaced position to be processed ground, while the blocked wiping roller rests on the ground.

Accordingly, when a change of direction, the wiping roller previously forming the wiping edge is moved to a position inactive raised position with respect to tillage and the previously inactive wiping roller in the active, the Wischkante bidding active position lowered. To block the lowered wiping roller, the means described below can be used, such as the blocking by engaging in a locking toothing. The raising and lowering of the wiping roller can be achieved electromechanically in response to a sensor detecting the direction of travel. Preferably, a mechanical embodiment is further in the way that the two wiping rollers are mounted in a common rocker element, with a rocker axis extending parallel to the wiping roller axes. Depending on the direction of travel, the bistable rocker falls in one or the other position for displacement of the respective wiping roller in the bottom loading wiping edge position. Here take the respective wiper roller axis and the rocker axis receiving planes to each other at an obtuse angle. This is more than 90 ° and is in a preferred embodiment facing away from the floor to be cleaned. The obtuse angle between the planes can continue to be about 180 °; however, an obtuse angle of less than 180 ° is preferred; for example, 175, 160 or 150 °.

The wiping roller blocking in one direction of travel of the device forms a line-like wiping edge. The roller is operated virtually static, so that it is moved at a standstill on the ground to be cleaned. The wiping edge extends transversely to the direction of travel of the device and takes over the cleaning of the soil.

The effect of the stationary wiping edge on the soil to be cleaned and the relative movement of this edge to the ground dissolves, binds and removes dirt. When moving the device in the opposite direction, if necessary, the two wiping rollers change their states, so that then forms the other wiping roller by blocking the wiper edge. Accordingly, according to this embodiment always results in a fixed Wiper edge in one direction of travel of the device. Thus, it is provided in one embodiment that the viewed in the direction of travel of the device front wiping roller forms a wiping edge. Alternatively, it is provided in an embodiment that always blocks the viewed in the direction of travel rear wiping roller to form the wiper edge. Furthermore, a wiping edge sets in by blocking a wiping roller in only one device traveling direction, while in the opposite direction of travel both wiping rollers rotate without blocking. In this context, it lends itself further to block both wiping rollers in one direction of travel and to let rotate freely in the opposite direction.

The proposed device is suitable both for dry floor cleaning, in which in particular one or both blocked wiping rollers act in one and / or other direction abrasive to the ground, as well as for wet floor cleaning, in which at least one of the wiping rollers is moistened.

It can further be provided that the blocking of the wiping roller in one direction of travel is achieved by a blocking latching or clamping device. It can always block the viewed in the direction of travel of the device front wiping roller. The determination of the wiping roller to form the wiper edge is achieved by a blocking latching engagement in this position. The determination can be further achieved, for example, by magnetic attachment. As an alternative, the wiping roller can also be clamped to block it. For this purpose, slot guides can be provided in the device chassis, in which the wiping roller is relatively displaceable in the direction of travel, so in particular by a few millimeters, for example from two to five millimeters, but also six to ten millimeters. The displacement of the wiping roller takes place in the course of reversing the direction of travel, in which the roller guided in the oblong holes is fed to a clamping position. In This clamping position acts, for example, a blocking wheel rotatably connected to the roller against a chassisseitige clamping edge, resulting in the blocking of the wiping roller and the formation of the wiper edge. In a new direction change the blocking wheel is again distanced to the clamping edge, after which the wiping roller is freely rotatable again. Also, depending on the direction of travel, a blocking inducing element of the corresponding wiping roller can be fed mechanically or electromechanically, this further optionally depending on a respective direction of travel sensing sensor or the like. In one embodiment, it is provided that the wiping roller provided with a saw toothing Section, which cooperates blocking only in one direction with a housing side hinged latching finger. In this case, a fine saw toothing is furthermore preferably provided, so that the desired blocked position for forming the wiping edge is rapidly reached when the direction of travel changes and the blocking of the wiping roller is correspondingly blocked. Thus, the effective sawtooth portion is preferably provided with more than four teeth, and so on with more than fifteen teeth, such as forty-five, sixty or ninety teeth, which, in one embodiment, distribute evenly over the circumference of a fastener section concentric with the wiping roller.

In an alternative embodiment of the subject invention it is provided that the non-blocked wiping roller is raised in a vertically spaced position to be processed ground, while the blocked wiping roller rests on the ground. Accordingly, when a change of direction, the wiping roller previously forming the wiping edge is moved to a raised position which is inactive with regard to tillage, and the previously inactive wiping roller is lowered into the active active position providing the wiping edge. To block the lowered wiping roller, the means already described can find application, such as blocking by engaging in a locking toothing. The raising and lowering of the wiping rollers can be achieved electromechanically in response to a sensor detecting the direction of travel. Preferred is a mechanical design, so on in the way that the two wiping rollers are mounted in a common rocker element, with a space parallel to the wiper roller axes extending rocker axis. Depending on the direction of travel, the bistable rocker falls in one or the other position for displacement of the respective wiping roller in the bottom loading wiping edge position. Here take the respective wiper roller axis and the rocker axis receiving planes to each other at an obtuse angle. This is more than 90 ° and is in a preferred embodiment facing away from the floor to be cleaned. The obtuse angle between the planes can continue to be about 180 °; however, an obtuse angle of less than 180 °, for example 175.160 or 150 °, is preferred.

In addition to being supported by the wiping rollers, the device may alternatively be supported by rollers or sliders on the floor to be maintained, so that the rocking motion concentrates solely on the rocker element. Alternatively, the device can serve as such as a rocker without separate rocker element. Regardless of the specific configuration of the rocker, the rocker switch depending on the forward or Rückhubbewegung the preferred stalk guided device done, so for example by a sensory detection of the stroke direction and signal evaluation motor-controlled rocker switch. The applied by the user Vor- or. Rückhubkraft can also be used purely mechanically, so for example, a connection joint between the device and guide stem or the like. In the pre-stroke or Rückhubrichtung be limited abutment. The displacement distances are track dimensions in the millimeter range, for example in the range from 5 to a total of 20 mm. This relative displacement of the connecting joint or a portion of the joint is transmitted via a on the Rocker acting lever mechanism. Also, the rocking movement of the entire device can be implemented similarly with this variant, for example, in an education of the connecting joint as Drehkippgelenk whose axis and a space parallel thereto, the device center of gravity receiving axis in the rocker neutral orientation of the device are perpendicular to each other. Again, the force caused by the user in a forward displacement of the device causes a corresponding tilting of the device for ground contact of the front in the direction of travel wiping roller. When pulling on the device handle, the device tilts accordingly about the rocker axis, so that thereafter the previously active wiping roller is raised and the other wiping roller is lowered.

In a preferred embodiment, the front in the direction of travel wiping roller is always blocked to form a wiper edge, while the considered in the direction of travel rear wiping roller runs freely or dwells in the raised inactive position. Alternatively, it is also possible for the wiping roller which is behind in the direction of travel to block, while the front wiping roller viewed in the same direction runs freely rotating or is raised. Also, both wiping rollers can block in one direction of travel while they rotate freely in the other direction of travel.

In a further development, it proves to be particularly advantageous that, depending on a change of direction of travel on the blocked wiping roller, a rotational position changed with respect to the last blocking position of this wiping roller is established. In the course of a wet cleaning of a soil therefore the existing roll surface is optimally utilized. This dirty almost uniformly over the entire circumference and can thus be fully utilized to Rückanschmutzung on the ground. In a following after a change of direction in a direction of travel wiping roller is due to the concomitant blocking of the wiping roller a random reached blocking rotation position. In the only by the friction to the floor to be cleaned wiping roller arise at each change of direction random wiping edges on the respective active wiping roller. Alternatively, the blocked rotational position can be achieved by rotating the wiping roller by a predetermined angular amount, this further for example by rotating the wiping roller in a raised position thereof. Thus, a segmental rotation of the inactive, ie not forming the wiping edge wiping roller is reached. The wiping roller is correspondingly rotated by a predetermined angle. The number of different wiping edges viewed over the circumference of the wiping roller is therefore predetermined. Thus, in particular as a function of the roll diameter, a segmental further rotation of the roll can be provided by a few angular degrees, for example by 2 ° to 5 °, in order to offer a new wiper edge for the next change of direction. The segmental further rotation of the inactive, ie not the wiping edge forming wiping roller can be done in the raised, ie spaced apart from the ground to be cleaned position of the roller.

In an exemplary embodiment, the segmental further rotation of the wiping roller is initially provided with a free-running impeller that detects the travel movement of the device. This is rotated in the course of the device movement in the direction of travel. Depending on the direction of travel causes the follower impeller, the displacement of the wiping roller by a predetermined angular amount. When moving in the opposite direction of travel, this wiping roller adjustment is prepared by a predetermined angular amount. For this purpose, it is provided in a preferred embodiment that the impeller for displacing the wiping roller by a predetermined angular amount by means of a Ausrückzapfens acting on a displaceable lever. The release pin is arranged eccentrically to the impeller axis for this purpose. The lever is displaced in a shift from a prepared position on the release pin for segmental displacement of the wiping roller and is in this position with further displacement of the device in the selected direction and corresponding direction of rotation of the impeller of the Ausrückzapfen overflowable. The lever has a driving projection for cooperation with a gearwheel which can be driven by the wiping roller. This is preferably formed like a tooth, cross-section adapted to the tooth gaps of the gear. The linear displacement of the lever as a result of a rear application via the release pin is preferably designed so that in the course of this shift further rotation of the gear is achieved by a tooth. Also, the shift of the gear by more than one tooth, for example, each stroke by two teeth or three teeth is possible. The lever is in the shifted displacement position, ie secured in the position after reaching the segmental further rotation of the wiping roller to block the wiping roller against an automatic return displacement. This is achieved for example by a pawl, which cooperates positively with the lever in the shifted displacement position. In compliance with the selected direction of travel, this pawl of the release pin is overflowable. When changing the direction of travel and concomitant change in the direction of rotation of the impeller of Ausrückzapfen acts on the pawl, that it is displaced to release the lever. The latter is shifted back to the starting position, which is done spring assisted in a preferred embodiment. In this rearwarded position of the driving projection of the lever is associated with a tooth gap ready for the next gear shift in a direction change. It is further preferred in this regard that the Rückverlagerungsmaß the lever is adapted to a distance measure of two adjacent tooth spaces of the gear.

One of the wiping rollers is to be moistened in connection with a wet cleaning of the floor with a liquid, for example water mixed with a cleaning agent, in particular the wiping roller providing the wiping edge. It is further preferred that both wiping rollers moisten are, this further combinatively also depending on the selected direction of travel of the device. With respect to the usual direction of travel of the device, a third Nachwischwalze is arranged in a development of the subject invention between the two wiping rollers. These, like the wiping rollers, can also be covered with a cleaning cloth or the like, for example with a microfiber cloth. The Nachwischwalze preferably has a relation to the two other wiping rollers larger diameter and is also constantly driven, so about an electric motor. The Nachwischwalze always rotates in one direction, this regardless of the direction of travel of the device. Solutions provide, however, to adjust the direction of rotation of Nachwischwalze especially for longer travel distances of the device in only one direction to the direction of travel, this further example, automatically triggered depending on the Verfahrrichtungswechsel. Also, the Nachwischwalze can be arranged in the simplest way mitlaufend, consequently, the rotational speed of the Nachwischwalze is dependent on the travel speed of the device. In an electromotive drive the Nachwischwalze, however, the rotational speed of the same may be greater or smaller than the travel speed of the device.

In a further preferred embodiment of the subject invention, the wiping rollers and / or the Nachwischwalze are spanned with a removable cleaning cloth. This may be a microfiber cloth, which is for example Velcro connected to the wiping roller. Alternatively, the cleaning cloth can also be drawn like a stocking over the wiping roller. In any case, a simple handling for removing the cleaning cloth is given to this a cleaning, such as a washing machine cleaning supply.

With an arrangement of the two wiping rollers in a rocker element, it is provided in a preferred embodiment of the article that the axis of the wiping roller arranged between the wiping rollers is at the same time the rocker axis. About the Nachwischwalze can also act the crucial moment on the rocker to let them turn over, so that the corresponding wiping roller falls into the bottom loading blocking position.

Also, the active, according to the wiping edge forming wiper roll or alternatively both wiping rollers can be simultaneously rotated stepwise, for example, the rotational speed is generally selected to be lower than a conventional travel speed of the device, so that between at least one of the wiping rollers and to be cleaned Soil slips. This results in an at least intermittently resulting wiping edge.

It can be provided between two spaced in the direction of travel, in each case wettable wiping rollers disposed between the wettable wiping rollers Nachwischwalze. According to this embodiment, a soil wet cleaning device of the type in question is created, by means of which a wiper cleaning in particular of hard floors can be achieved in a simple and convenient way for the user. There are two, preferably in each direction - ie usually viewed from the user front and rear - associated wiper rollers provided, which are further preferably humidified depending on the direction of travel. About the moistened wiping wheels of the soil to be cleaned is moistened again, in this regard, a mist-wet tillage is preferred. Accordingly, it requires only small amounts of liquid. The two wiping rollers are assigned edge edge near the front side and the rear side of the device assigned, this continues to extend transversely to the usual direction of travel of the device, which at the same time the machining width is defined over the axial roller length. Independent of the respective direction of travel to the front or to the rear, the Nachwischwalze is connected in each case behind the front in the direction of travel wiping roller, which also actively engages in tillage. This takes, for example, excess amounts of liquid from the ground and possibly not picked up by the first wiping roller dirt particles and leaves preferably a mist-moist coating on the cleaned soil.

The Nachwischwalze is humidified in one embodiment of the subject invention, is correspondingly actively added by means of a liquid supply with liquid. The liquid supply can be done continuously or intermittently. Further alternatively, the Nachwischwalze can not be humidified. This can also be regulated individually, for example, depending on the degree of soiling or on the type of floor covering. In addition, the Nachwischwalze may have a larger diameter than one or both wettable wiping rollers, which latter also have the same diameter in one embodiment. Thus, the diameter of the Nachwischwalze corresponds to about 1.1 to 2 times the wiping roller diameter, such as 1.3 to 1.5 times. A possible embodiment provides that the Nachwischwalze has a smaller or equal diameter than one or both wiping rollers. Thus, the diameter of the Nachwischwalze example, the 0.7 to 1 times, so on, for example, 0.75 to 0.9 times the diameter of a wiper roll correspond.

In a further development of the subject invention, it is provided that the two wiping rollers are rotatable, of which, however, blocks one in each direction of travel of the device. The blocking in the direction of travel of the device wiping roll here forms a line-like wiping edge. The roller is operated virtually static, so that it is moved at a standstill on the ground to be cleaned. The wiping edge extends here transversely to the direction of travel of the device and takes over the cleaning of the soil.

The effect of the stationary wiping edge on the soil to be cleaned and the relative movement of this edge to the ground dissolves, binds and removes dirt. When moving the device in the opposite direction, the two wiping rollers change their states, so that then forms the other wiping roller by blocking the wiper edge. Accordingly, according to this embodiment always results in a fixed Wiper edge in the front area viewed in the direction of travel of the device. Alternatively it can be provided in one embodiment that always blocks the viewed in the direction of travel rear wiping roller to form the wiper edge.

Further, it can be provided that both wiping rollers rest on the floor to be cleaned in each direction of travel and that the blocking of the wiping roller in one direction of travel is achieved by a blocking latching or clamping engagement, while in the other direction of travel the engagement is prevented and the wiping roller runs along , Thus, it is always possible to block the front wiping roller viewed in the direction of travel of the device while the rear, correspondingly trailing wiping roller runs along. In a change of direction of the device accordingly also change the states of the wiping rollers, so that thereafter the previously follower wiping roller then blocked and the previously forming the wiper edge wiping roller runs freely. The determination of the wiping roller to form the wiper edge is achieved by a blocking latching engagement in this position. The determination can be further achieved, for example, by magnetic attachment. As an alternative, the wiping roller can also be clamped to block it. For this purpose, slot guides can be provided in the device chassis, in which the wiping roller is relatively displaceable in the direction of travel, so in particular by a few millimeters, for example from two to five millimeters, but also six to ten millimeters. The displacement of the wiping roller takes place in the course of reversing the direction of travel, in which the roller guided in the oblong holes is fed to a clamping position. In this clamping position, for example, a blocking wheel rotatably connected to the roller acts against a chassis-side clamping edge, which leads to the blocking of the wiping roller and to the formation of the wiping edge. In a new direction change the blocking wheel is again distanced to the clamping edge, after which the wiping roller is freely rotatable again. Also, depending on the direction of travel, a blocking-inducing element of the corresponding wiping roller can be supplied mechanically or electromechanically, this further optionally in dependence In one embodiment, it is provided that the wiping roller has a section provided with a saw toothing, which cooperates blocking only in one direction of travel with a detent finger hinged on the housing side, while in the other direction of travel and associated opposite counteracted Rotation of the wiping roller of the locking fingers ratchet over the saw teeth. In this case, a fine saw toothing is furthermore preferably provided, so that the desired blocked position for forming the wiping edge is rapidly reached when the direction of travel changes and the blocking of the wiping roller is correspondingly blocked. Thus, the effective sawtooth portion is preferably provided with more than four teeth, and so on with more than fifteen teeth, such as forty-five, sixty or ninety teeth, which, in one embodiment, distribute evenly over the circumference of a fastener section concentric with the wiping roller.

In an alternative embodiment of the subject invention it is provided that the non-blocked wiping roller is raised in a vertically spaced position to be processed ground, while the blocked wiping roller rests on the ground. Accordingly, when a change of direction, the wiping roller previously forming the wiping edge is moved to a raised position which is inactive with regard to tillage, and the previously inactive wiping roller is lowered into the active active position providing the wiping edge. To block the lowered wiping roller, the means already described can be used, such as the blocking by engaging in a locking toothing. The raising and lowering of the wiping rollers can be achieved electromechanically in response to a sensor detecting the direction of travel. Preferred is a mechanical design, so on in the way that the two wiping rollers are mounted in a common rocker element, with a space parallel to the wiper roller axes extending rocker axis. Depending on the direction of travel, the bistable rocker falls in one or the other position for displacement of the respective wiping roller in the soil loading end Wiping edge position. Here take the respective wiper roller axis and the rocker axis receiving planes to each other at an obtuse angle. This is more than 90 ° and is in a preferred embodiment facing away from the floor to be cleaned. The obtuse angle between the planes can continue to be about 180 °; however, an obtuse angle of less than 180 °, for example 175.160 or 150 °, is preferred.

The device can be supported by rollers or sliders on the floor to be cared for, so that the rocking motion concentrates solely on the rocker element. Alternatively, the device can serve as such as a rocker without separate rocker element. Regardless of the specific configuration of the rocker, the rocker switch depending on the forward or Rückhubbewegung of preferably stalk guided device done, so for example by a sensory detection of the stroke direction and signal evaluation motor-controlled rocker switch. The forward or return stroke force applied by the user can also be used purely mechanically, so that, for example, a connecting joint between the device and guide stem or the like can be displaced in a stop-limited manner in the pre-lifting or return stroke direction. The displacement distances are track dimensions in the millimeter range, for example in the range from 5 to a total of 20 mm. This relative displacement of the connecting joint or a portion of the joint is transmitted via a lever mechanism acting on the rocker. Also, the rocking movement of the entire device can be implemented similarly with this variant, for example, in an education of the connecting joint as Drehkippgelenk whose axis and a space parallel thereto, the device center of gravity receiving axis in the rocker neutral orientation of the device are perpendicular to each other. Again, the force caused by the user in a forward displacement of the device causes a corresponding tilting of the device for ground contact of the front in the direction of travel wiping roller. When pulling on the device handle tilts accordingly the device around the rocker axis, so that thereafter the previously active wiping roller is raised and the other wiping roller is lowered.

In a preferred embodiment, the front in the direction of travel wiping roller is always blocked to form a wiper edge, while the considered in the direction of travel rear wiping roller runs freely or dwells in the raised inactive position. Alternatively, it is also possible for the wiping roller which is behind in the direction of travel to block, while the front wiping roller viewed in the same direction runs freely rotating or is raised.

In a further development, it proves to be particularly advantageous that, depending on a change of direction of travel on the blocked wiping roller, a rotational position changed with respect to the last blocking position of this wiping roller is established. In the course of a wet cleaning of a soil therefore the existing roll surface is optimally utilized. This dirty almost uniformly over the entire circumference and can thus be fully utilized to Rückanschmutzung on the ground. In a following after a change of direction in a direction wiping roller is due to the concomitant blocking of the wiping roller a randomly reached blocking rotational position. In the only by the friction to the floor to be cleaned wiping roller arise at each change of direction random wiping edges on the respective active wiping roller. Alternatively, the blocked rotational position can be achieved by rotating the wiping roller by a predetermined angular amount, this further for example by rotating the wiping roller in a raised position thereof. Thus, a segmental rotation of the inactive, ie not forming the wiping edge wiping roller is reached. The wiping roller is correspondingly rotated by a predetermined angle. The number of different wiping edges viewed over the circumference of the wiping roller is therefore predetermined. Thus, in particular depending on the roll diameter, a segmental further rotation of the roller by a few degrees, for example by 2 ° to 5 ° be provided to offer hereafter for the next change of direction a new wiper edge. The segmental further rotation of the inactive, ie not the wiping edge forming wiping roller can be done in the raised, ie spaced apart from the ground to be cleaned position of the roller.

In an exemplary embodiment, for segmental further rotation of the wiping roller, first a free-running impeller which detects the travel movement of the device is provided. This is rotated in the course of the device movement in the direction of travel. Depending on the direction of travel causes the follower impeller, the displacement of the wiping roller by a predetermined angular amount. When moving in the opposite direction of travel, this wiping roller adjustment is prepared by a predetermined angular amount. For this purpose, it is provided in a preferred embodiment that the impeller for displacing the wiping roller by a predetermined angular amount by means of a Ausrückzapfens acting on a displaceable lever. The release pin is arranged eccentrically to the impeller axis for this purpose. The lever is displaced in a shift from a prepared position on the release pin for segmental displacement of the wiping roller and is overflowable in this position upon further displacement of the device in the selected direction and corresponding direction of rotation of the impeller of the release pin. The lever has a driving projection for cooperation with a gearwheel which can be driven by the wiping roller. This is preferably formed like a tooth, cross-section adapted to the tooth gaps of the gear. The linear displacement of the lever as a result of a rear application via the release pin is preferably designed so that in the course of this shift further rotation of the gear is achieved by a tooth. Also, the shift of the gear by more than one tooth, for example, each stroke by two teeth or three teeth is possible. The lever is in the shifted displacement position, ie secured in the position after reaching the segmental further rotation of the wiping roller to block the wiping roller against an automatic return displacement. This is for example achieved by a pawl which cooperates positively with the lever in the shifted displacement position. In compliance with the selected direction of travel, this pawl of the release pin is overflowable. When changing the direction of travel and concomitant change in the direction of rotation of the impeller of Ausrückzapfen acts on the pawl, that it is displaced to release the lever. The latter is shifted back to the starting position, which is done spring assisted in a preferred embodiment. In this rearwarded position of the driving projection of the lever is associated with a tooth gap ready for the next gear shift in a direction change. It is further preferred in this regard that the Rückverlagerungsmaß the lever is adapted to a distance measure of two adjacent tooth spaces of the gear.

A further facilitation of tillage, in particular the wet soil treatment is achieved in that an extraction is provided. According to this embodiment, the usual hard floor cleaning, namely sweeping or vacuuming, wiping and wiping is achieved with only one device. It does not require the handling of several different devices accordingly. The suction can be done separately and independently of the wipe processing, so on, for example, temporally separated. Thus, first with the device, an extraction of the soil to be cleaned can be carried out, after which, for example, by switching the wiping function is brought about. In this regard, however, preference is given to direct tillage by suction and subsequent wiping, which is achieved by positioning the suction in the direction of travel in front of the respective wiping roller. Thus, a suction is provided limited to the area of one or both wiping rollers. The extraction takes place in an advantageous manner over the entire device width, ie more preferably at least over the axial length of the wiping rollers. If each wiping roller is associated with a suction, both extraction sections can always be activated in the course of soil cultivation, independently of the respective direction of travel.

In a further development of the subject invention is provided in this regard that with two distance in the direction of travel distance corresponding to the wiping rollers suction switching the suction depending on the direction of travel is possible, which causes an intensification of the suction in the range of each activated suction. This is further generally considered in the direction of travel each front suction before the associated wiping roller. With two in the direction of travel corresponding to the distance of the wiping rollers distanced suction combined their Absaugwege preferably within the unit and lead to a suction / blower unit, which may be located further inside the device, but alternatively be provided externally provided via a device-side interface can.

In one embodiment, the wiping roller or both wiping rollers are moistened by capillary transport, for example by arranging a bristle strip extending over the length of the wiping roller, which is in contact with the rear to form a liquid tank. The free ends of the bristle strip are in direct contact with the roll surface. Alternatively, a kind of wick or the like can be interposed. Also, the liquid may be delivered to the wiping rollers via a pump or a pressure controlled cylinder. Also conceivable are solutions in which the liquid is fed gravimetrically to the roller. The liquid application to the roller after transport from the tank into the roller area can be achieved via nozzles, drip strips or slit membranes.

Further alternatively or also in combination with the above-described solutions, it is provided that the wiping roller is moistened by a time-limited, possibly repeating, liquid free jet passing through a jet maximum. This free jet is released via a nozzle, wherein a fluid pressure generated for example via a pump in the way is released to the nozzle slider-like, for example by means of a valve. This results from the closed position initially an increasing beam intensity, which decreases again after passing through a maximum beam in the course of valve closing intensity. It may further be provided that the liquid application is clocked on the roller, takes place in an interval-like manner, which order can be further activated or deactivated as a function of the direction of travel of the device. A nozzle is associated with an end of the wiping roller, according to which the moistening takes place by means of the free jet of liquid from one end of the wiping roller oriented along the longitudinal extent of the roller in the direction of the distal end of the roller. Due to the intended initially increasing beam intensity and passing through a maximum beam preferably in the region of the end of the wiping roller opposite the nozzle and the beam intensity decreasing thereafter, a uniform moistening of the wiping roller over its entire length is achieved starting from only one side. Further, two nozzles may be provided which are arranged facing each other, so on, each one nozzle associated with one end of the wiping roller. A particularly uniform application of liquid to the floor to be maintained or cleaned is achieved by assigning the jet in vertical projection to the zenith of the wiping roller.

One embodiment provides that the wiping roller is moistened via a plurality of nozzles directed towards the zenith of the wiping roller. In this regard, two or more nozzles may be provided, which are further aligned substantially perpendicular to the axis of rotation of the wiping roller. In addition, four, six or nine to twelve such nozzles can be arranged on top of the roller, moreover, each further integer value over two. The liquid application via these nozzles can be continuous, this more preferably only when the associated wiping roller is blocked and offers the wiping edge. An interval moistening of the wiping roller via the nozzles is possible. The nozzles are further in juxtaposition arranged along a space parallel to the shaft axis. In this orientation, it is advisable to supply the nozzles for temporary moistening of the wiping roller via a common supply line. Thus, furthermore, the nozzles can be formed directly out of a liquid feed line aligned parallel to the shaft axis. According to this embodiment, a uniform moistening of the wiping roller is made possible in a favorable manner.

In a further preferred embodiment, the Nachwischwalze is driven, so in particular via an integrated integrated in the device electric motor. The Nachwischwalze may in this regard have a preferred direction of rotation is directed either in the usual direction of travel forward or opposite thereto. It is also conceivable in this regard, an embodiment in which, in particular at longer rectified trajectories, such as in the wet cleaning of longer corridors or the like., With the change of the direction of travel of the device at the same time a rotation reversal of the Nachwischwalze is performed. The rotational speed of the Nachwischwalze is in any case different from the usual travel speed of the device, so more preferably a multiple faster than the usual travel speed of the device in the course of a conventional, hand-held operation of the same. Also possible are solutions in which the rotational speed of the Nachwischwalze is less than the traversing speed of the device, which sets a slip in the Nachwischwalze. In a further alternative embodiment, the Nachwischwalze is not actively driven, but formed mitlaufend.

The receiving the cleaning fluid tank of the device is arranged in a preferred embodiment, at least to a greater extent between the wiping rollers. This can continue to be formed to a large extent unterflurseitig the device. Such a liquid tank can be further filled with water or with a finished water-detergent mixture. Alternatively, a two-chamber tank is conceivable, the water and detergent concentrate (in the form of liquid, powder, Taps or the like.) Separately and mixed for use in a suitable manner ready for use.

The wiping rollers and / or the Nachwischwalze pollute the surface side in particular their spanned cleaning cloth or the like. In the course of tillage. As a result, it is necessary to clean the rollers. For this purpose, the rollers, ie the wiping rollers and / or the Nachwischwalze removably arranged in the device. In order to create a hygienic solution, the rollers may be provided with corresponding handling tabs, so that a removal of the rolls without direct contact with the dirty cleaning surfaces can be achieved. The rollers are further designed to be washable. Also, a solution is conceivable in which all rolls to be cleaned, namely in a preferred embodiment, the two wiping rollers and the Nachwischwalze are held together removable in a cassette, which cassette is easily removed by the user from the device. This also creates a hygienic solution. Another alternative is also a solution in which the wiping rollers and / or the Nachwischwalze are covered with a removable cleaning cloth, such as microfiber cloth. In order to offer an intermediate cleaning of the rollers in the wet processing of large rooms or multiple rooms, an intermediate cleaning station may further be provided, which optionally have a cleaning liquid having rotating brushes or the like. Mechanically act on the rollers of the patch on this station device. It is possible that the station-side brushes are actively driven and these work against the device-side rollers with removal of the collected dirt, especially the coarse dirt. Also, the station can passive, ie not actively driven cooperate with the device by the rollers of the device are rotated and these work against fixed brushes of the station.

In order to prevent the picking up of liquid via the suction device, a moisture separator is provided further in the provided suction channel of the device. This is designed so that a differentiation of dirt or dust particles and water particles is achieved in the suction air flow, so that the dirt and dust particles fed to a dust filter and the separated liquid can be fed back into the tank. Alternatively, the moisture separator may also be designed so that when a predetermined degree of moisture in the suction air is exceeded, the suction channel is blocked and thus a further suction is prevented.

It is also possible to provide a moisture sensor monitoring the suction channel, which measures the degree of moisture in the particle-laden suction air. In the case of a detected liquid or in the case of exceeding a predetermined moisture measure in the suction channel, a blower delivering the suction is switched off or at least reduced to a minimum power not sufficient for a liquid transport. According to this embodiment, a suction of a medium with increased moisture content is certainly counteracted. In particular, the absorption of liquids is thereby prevented.

As a humidity sensor, a capacitive sensor can be used. Such sensors are known for example from the technical field of moisture measuring devices for walls. Here, the sensor is tuned such that it reacts only to water particles and outputs a signal analogous to the detected moisture quantity. Such a sensor can be used in the flow channel of the device, so further preferably in an angled channel section, so that the sensor in the area of the resulting impact surface of possible moisture particles also reliably detects them. The determined sensor value is processed by a downstream electronics and with a predetermined setpoint whose exceeded exceedance results in an immediate safety shutdown of the vacuum cleaner.

The proposed device can be designed as a self-propelled device in the sense of a suction / wiping robot, but also as an attachment for a conventional household vacuum cleaner, on which vacuum cleaner on the one hand, the power supply of the attachment. On the other hand, via the vacuum cleaner and the suction air flow connection is achieved, including the device-side Absaugwege combined via a conventional rotary / tilting joint as a device interface with the vacuum cleaner.

Fig. 1

in perspektivischer Darstellung ein Haushalts-Bodenreinigungsgerät in Form eines Feuchtreinigungs-Vorsatzgerätes mit angeschlossenem Staubsauger;

Fig. 2

das Bodenreinigungsgerät in einer perspektivischen Ein-zeldarstellung nach Abnahme einer Gerätehaube;

Fig. 3

die Ansicht gemäß dem Pfeil III in Fig. 2;

Fig. 4

die Ansicht gemäß dem Pfeil IV in Fig. 2;

Fig. 5

die Unteransicht gegen das Gerät;

Fig. 6

die Stirnansicht gegen das Gerät gemäß dem Pfeil VI in Fig. 2;

Fig. 7

die Rückansicht gegen das Gerät gemäß dem Pfeil VII in Fig. 2;

Fig. 8

den schematischen Schnitt gemäß der Linie VIII-VIII in Fig. 5;

Fig. 9

den schematischen Schnitt gemäß der Linie IX-IX in Fig. 5;

Fig. 10

eine schematische, geraffte Schnittdarstellung gemäß der Linie X-X in Fig. 5;

Fig. 11

das Bodenreinigungsgerät der ersten Ausführungsform in einer perspektivischen Explosionsdarstellung;

Fig. 12

einen Querschnitt durch das Gerät in einer zweiten Ausführungsform einer Walze zugeordnete Befeuchtungseinrichtung betreffend;

Fig. 13

den Schnitt gemäß der Linie XIII-XIII in Fig. 12;

Fig. 14

einen Querschnitt gemäß Fig. 9, eine alternative Ausgestaltung betreffend;

Fig. 15

das Reinigungsgerät in einer Seitenansicht, eine weitere Ausführungsform betreffend;

Fig. 16

eine schematische Längsschnittdarstellung des Gerätes nach Fig. 15;

Fig. 17

eine der Fig. 15 entsprechende Darstellung, jedoch bei einer Verlagerung des Geräts in die entgegen gesetzte Richtung;

Fig. 18

eine der Fig. 16 entsprechende Darstellung, jedoch die Stellung gemäß Fig. 17 betreffend;

Fig. 19

in einer weiteren Ausführungsform eine Wischwalze mit einem drehfest daran angeordnetem Blockierrad, bei Lagerung der Wischwalze in Langlochführungen des Gerätegehäuses, die Freilaufstellung der Wischwalze betreffend;

Fig. 20

eine der Fig. 19 entsprechende Darstellung, jedoch die Klemm-Blockierstellung betreffend;

Fig. 21

einen Querschnitt durch das Blockierrad in der Klemm-Blockierstellung;

Fig. 22

eine schematische Perspektivdarstellung einer Mechanik zur Verlagerung der Wischwalze um einen vorbestimmten Winkelbetrag in Abhängigkeit von der Fahrrichtung des Geräts.

Below, the invention with reference to the accompanying drawings, which illustrates only exemplary embodiments, explained in more detail. It shows:

Fig. 1

in perspective a household floor cleaning device in the form of a wet cleaning attachment with attached vacuum cleaner;

Fig. 2

the floor cleaning device in a perspective Einzzelarstellung after removal of a device hood;

Fig. 3

the view according to the arrow III in Fig. 2 ;

Fig. 4

the view according to the arrow IV in Fig. 2 ;

Fig. 5

the bottom view against the device;

Fig. 6

the front view against the device according to the arrow VI in Fig. 2 ;

Fig. 7

the rear view against the device according to the arrow VII in Fig. 2 ;

Fig. 8

the schematic section according to the line VIII-VIII in Fig. 5 ;

Fig. 9

the schematic section along the line IX-IX in Fig. 5 ;

Fig. 10

a schematic, ruched sectional view along the line XX in Fig. 5 ;

Fig. 11

the floor cleaning device of the first embodiment in an exploded perspective view;

Fig. 12

a cross-section through the device in a second embodiment of a roller associated humidification concerning;

Fig. 13

the section according to the line XIII-XIII in Fig. 12 ;

Fig. 14

a cross section according to Fig. 9 relating to an alternative embodiment;

Fig. 15

the cleaning device in a side view, relating to a further embodiment;

Fig. 16

a schematic longitudinal sectional view of the device according to Fig. 15 ;

Fig. 17

one of the Fig. 15 corresponding representation, but with a displacement of the device in the opposite direction;

Fig. 18

one of the Fig. 16 corresponding representation, but the position according to Fig. 17 concerning;

Fig. 19

in a further embodiment, a wiping roller with a blocking wheel arranged thereon in a rotationally fixed manner, during storage of the wiping roller in slot guides of the device housing, concerning the freewheeling position of the wiping roller;

Fig. 20

one of the Fig. 19 corresponding representation, but concerning the clamp blocking position;

Fig. 21

a cross section through the blocking wheel in the clamping blocking position;

Fig. 22

a schematic perspective view of a mechanism for displacing the wiping roller by a predetermined angular amount as a function of the direction of travel of the device.

Shown and described is first with reference to Fig. 1 a movable household floor cleaning device 1 as an attachment 2 for a stalk guided here household vacuum cleaner 3. The latter has in a conventional form a basic housing 4, in which a suction / blower unit, not shown, is arranged. About this a suction air flow is achievable.

On the basic housing 4 of the vacuum cleaner 3 is a, not shown, a filter bag receiving cartridge 5 is hinged. The filter bag is used to filter the dirt-laden suction air.

To guide the vacuum cleaner 3, this is provided with a fixed to the base housing 4 handle 6. This has at the end a handle 7. The electrical supply takes place via an incoming electric cable 8 in the handle.

Trained as a wet cleaning device floor cleaning device 1 is connected via a rotary / tilting joint 9 to the vacuum cleaner 3 both electrically and fluidically. The hinge 9 offers the possibility of tilting the vacuum cleaner 3 relative to the attachment 2 in the course of the usual work. Further, that joint 9 have a so-called parking position, in which the connected vacuum cleaner 3 via a 90 ° position, d. H. displaced beyond a vertical orientation of the same in the direction of an end face of the device 1 and rastgehaltert in this position. This position can be further connected to switching functions, such as a power reduction of the suction fan and / or the shutdown vacuum cleaner side and / or header side electric motors.

The floor cleaning device 1 is adapted to the dimensions of conventional attachments in the form of suction nozzles and / or brush cleaning devices. Accordingly, a height of the floor cleaning device 1 is selected, which allows the driving under common furniture; this is achieved for example by a height of about 150 mm. The width considered transversely to a usual travel direction r corresponds approximately to a factor of 3 to 4 times the height of the device, this further for a substantially approximately square ground plan.

The device 1 is provided on the underside with three passing through the chassis floor and in the operating position on the floor to be cleaned 10 resting rollers. There are two wiping rollers 11, 12 and a Nachwischwalze 13 are provided in this regard. About these rollers, the device 1 is supported on the floor 10.

In an alternative embodiment, the chassis 16 may have separate rollers over which the device 1 is supported on the floor 10 to be cleaned. In this case, the wiping rollers 11, 12 and optionally the Nachwischwalze 13 are guided only with their own weight and / or under a defined Federvorbelastung on the floor 10. It is achieved as a decoupling of the user via the handle 6 initiated force and the weight of the device.

The rollers all extend transversely to the usual direction of travel r and accordingly also transversely to the direction of travel r opposite direction r ', which directions of movement r and r' the usual working movement of the user of a vacuum cleaner results, namely generally alternately back and forth, this further optionally below Dodge lightly out of the linear to work on a next path.

The wiping roller 11 is assigned to the end region 14 of the device, while the other wiping roller 12 is positioned in the rear region 15. In this rear region 15, the aforementioned rotary / tilting joint 9 is formed on the upper side.

The wiping rollers 11 and 12 extend approximately over the entire transverse to the direction of travel r or r 'considered device width, so further specifically in the illustrated example about 85% of this width.

According to the above-described arrangement, the wiping roller 11 is arranged at the front during movement of the device 1 in the direction of travel and the wiping roller 12 at the rear, while in a process of the wiper device 1 in direction r 'the wiping roller 12 is positioned at the front and the wiping roller 11 at the rear.

Between the two wiping rollers 11 and 12 is in the in the Fig. 1 to 11 illustrated first embodiment immediately adjacent to the wiping roller 11, the Nachwischwalze 13 is positioned. This is initially designed compared to the wiping rollers 11 and 12 viewed in the axial direction shorter, according to the illustrated embodiment has only an axial length corresponding to about 75% of the measured in the same direction housing width. In addition, the Nachwischwalze 13 with respect to each wiping roller 11, 12 increased in diameter. Thus, in the illustrated embodiment, both wiping rollers 11 and 12 of the same diameter, while the diameter of the Nachwischwalze 13 is increased in comparison to about 1.3 times.

The parallel aligned axes of the wiping rollers 11 and 12 and the Nachwischwalze 13 are positioned so that the rollers span a common support plane underside.

By between the Nachwischwalze 13 and the wiper roller 12 resulting region is also a unterflurseitig the chassis 16 is transverse to the direction of travel r and r 'extending tank 17 is provided. This is on the one hand in the region of a housing broadside over in an approximately right-angled upward section 18. This is provided with a filler neck 19 which is covered in the operating position of a screw 20. About the filler neck 19, the tank can be filled with a cleaning liquid.

The filler neck 19 passes through a device hood 21, which also forms side skirts, and front and rear aprons, which aprons are provided on the underside with directed to the bottom 10 sealing strips 53. The aprons extend in the direction of the floor to be cared for 10 and end with their sealing line 53 at a slight distance to this, so that the cleaning area of the device 1 is covered approximately to the sides.

Each wiping roller 11 is associated with a suction region 22, 23, this further in each case directly upstream of the travel direction r or r '. Thus, the suction region 22 is arranged in the direction of travel r in front of the wiping roller 11 and the suction region 23 in the direction of travel r 'in front of the wiping roller 12.

Essentially, the suction areas 22, 23 are nozzle-like, extending over the entire housing width extending, wherein in the resulting slot-like nozzle mouth 24 to even out the suction ratios over the entire width of the housing baffles 25 are provided.

The downwardly directed in the direction of the bottom 10 to be cleaned, open Absaugbereiche 22, 23 continue in below the device hood 21 guided channel-like Absaugwege 26, 27, which are brought together in over coverage to the unterflurseitig provided tank 17 to a flow channel 28. The latter is connected to the formed in the rotary / tilting joint 9 channel 29, via which the suction line connection to the vacuum cleaner 3 takes place.

In the flow channel 28, further in the angled transition region to the formed in the rotary / tilting joint 9 channel 29, a capacitive sensor S is arranged. This serves as a humidity sensor, which is tuned so that it only reacts to water particles and outputs a signal analogous to the detected moisture quantity. The arrangement of the sensor S is in this case chosen so that it represents a baffle for possible moisture particles. The determined sensor value is processed by a downstream electronics and compared with a predetermined setpoint. If an excess is detected, an immediate shutdown of the vacuum cleaner or a reduction that is insufficient for fluid transport to a minimum capacity occurs. According to this embodiment, the absorption of a medium with an increased degree of moisture is reliably counteracted. In particular, the absorption of liquids is thereby prevented.

Both suction areas 22 and 23 are active after switching on the vacuum cleaner 3 and corresponding application of the suction power, so that correspondingly sucked in via both suction areas 22 and 23. An alternative solution envisages activating only the suction area 22 or 23 at the front in the travel direction r or r 'and deactivating the other suction area 23, 22 so as to achieve approximately maximum suction power in the respectively active suction area.

The Nachwischwalze 13 is actively driven. For this purpose, an integrated in the device 1 electric motor 30, which acts on a drive shaft 32 via a transmission gear 31. The latter is provided with a coupling teeth 33.

The first formed as a cylindrical hollow body Nachwischwalze 13 is provided at one end with a form-fitting insertable coupling part 34. This has outside wall radially projecting driving means 35, which engage in corresponding, not shown in the drawings, the inside of the Nachwischwalze 13 molded driving recesses. Centrally, the coupling part 34 is provided with a hub 36 which is formed on the inside for cooperation with the coupling teeth 33 of the drive shaft 32. About the hub 36 and the coupling part 34, the positive rotational drive of the Nachwischwalze 13 is reached.

On the other hand, the Nachwischwalze 13 is supported and supported in both the axial and radial direction by a chassisseitig settable centering pin 37th

The Nachwischwalze 13 is always rotationally driven in the operating state of the device 1.

The two wiping rollers 11 and 12 are not actively driven against the Nachwischwalze 13. These have initially extended in the axial direction on the respective end face protruding axle stub 38, with which the wiping rollers 11 and 12 einliegen in corresponding axle mounts 39 of the chassis 16. About this axial securing of the wiping rollers 11 and 12 is achieved.

In the region of the drive side of the Nachwischwalze 13 facing ends of the wiping rollers 11 and 12 carry there formed Achskörperstummel 38 each have a gear 40, 41. This is non-rotatably connected to the Achskörperstummel 38 and herewith the wiping roller 11 and 12 respectively.

The two gears 40 and 41 each have circumferentially a saw toothing. These counter-teeth 42 and 43 act together with chassisseitig set, rebounding formed detent fingers 44 and 45. From the opposite teeth of the two wiping rollers 11 and 12 arise in connection with the corresponding acting locking fingers 44 and 45 directional rotational driving the wiping rollers 11 and 12 or blocks , wherein a rotation of a wiping roller 11 or 12 is achieved solely by frictional engagement with the soil to be processed 10 in the course of tillage and the associated displacement of the device.

As is apparent in particular from the schematic representation in FIG Fig. 10 can be seen, the saw teeth 42 and 43 selected so that at a forward displacement of the device 1 in the direction r the front wiper roller 11 blocked by corresponding action of the locking finger 44 on the saw teeth 42, while the rear wiping roller 12 in ratchet-like evasion of the corresponding locking finger 45 via the saw teeth 43 turns freely. In accordance with the opposite direction of travel (arrows r '), the state changes to the effect that now the wiping roller 11 rotates, while then blocks the front wiper roller 12 in the direction of travel.

By respectively blocking wiping roller 11 or 12, this is operated statically in this state. This means that it is pushed over the floor to be cleaned 10 at a standstill. This produces a wiping edge along the contact line between the wiping roller and the floor 10 to be cleaned. This wiping edge takes over the cleaning of the soil by the movement of this temporary edge relative to the bottom 10, whereby the dirt is dissolved, bound and transported away.

When changing the direction of travel, for example, from direction r to r 'or vice versa, the wiping edge changes to the other wiping roller, which then blocks, while the wiping edge previously offering wiping roller rotates freely. This has the consequence that at a next change of the direction of travel, a new, randomly reached wiping edge is formed, which has the advantage of an approximately uniform soiling of the entire roll surface in the course of a cleaning process. Correspondingly, new, clean wiping edges are set up again and again until a return soiling onto the ground.

The wiping rollers 11 and 12 as well as the Nachwischwalze 13 are circumferentially coated by a cloth-like cleaning pad 46, 47, for example in the form of a microfiber cloth.

Next, the rollers 11 to 13 can be removed from the device 1, so in particular laterally pulled out of the device 1 optionally after lifting the device cover 21 to forward the rollers for cleaning.

The wiping rollers 11 and 12 are moistened for the wet cleaning of the floor 10. For this purpose, in the space through the chassis 16, the respective wiping roller 11 and 12 overlapping space nozzles 48 are provided. These will supplied via hose lines, not shown, with the interposition of a pump 49 from the tank 17.

Each wiping roller 11 and 12 are associated with two nozzles 48, so further each viewed in the axial direction of a nozzle end, wherein further the two of a wiping roller 11 and 12 associated nozzles 48 are aligned zugerichtet each other.

In each case, the blocked wiping roller 11 or 12 is moistened via the nozzles 48, so on according to the direction of travel of the device, the respective front, the wiper edge offering wiper roller 11 or 12. The nozzles 48, which are associated with the freely rotatable wiping roller 12, 11 are disabled. The respective feed of the nozzles 48 of the blocked wiping roller 11 or 12 is controlled depending on the direction of an electronics 50, not shown.

The change from one pair of nozzles to the other pair of nozzles as a function of a Verfahrrichtungswechsel via a pump 49 associated, not shown valve, which operates, for example, slide-like. This results in an activation of the nozzles 48, a liquid free jet with initially increasing beam intensity up to a strong jet in the beam maximum, after which the jet intensity decreases again in the course of the slide-like closing of the valve. In a design of the facing nozzles 48, in which each nozzle 48 wets the associated roller over half the axial length, according to this embodiment, a uniform liquid application to the roller is achieved, this further in vertical projection associated with the zenith of the wiping roller 11 and 12 respectively Alternatively, for example, a rotary element or a rotary valve can be used for valve design.

About capillary paths, the applied liquid is spent by the respective cleaning pad 46 and 47 in the region of adjusting wiper edge.

An alternative embodiment of the moistening device for the wiping roller 11 or 12 is in the Fig. 12 and 13 shown. Here, the tank 17 or the liquid stored in the tank 17 is in direct contact with a humidifying device. The latter is formed by a bristle strip 51, which is responsible for the Kapillartransport. This bristle strip 51 extends above the rolling zenith over the entire axial length of the roller, wherein the free ends of the bristles wet a parallel to the roller axis aligned wick 52. From the saturated wick 52, the liquid is removed via the associated wiping roller 11 and 12 respectively. The capillary transport can also be achieved by a sponge body or other capillary-acting elements.

In Fig. 14 a further alternative embodiment of a moistening device for a wiping roller 11 and 12 is shown. This moistening device is formed by a plurality of nozzles 54 which are directed towards the zenith of the wiping roller 11 or 12 and are arranged in juxtaposition along a space parallel to the wiping roller axis x. In the illustrated embodiment, these are 27 of such nozzles 54, which are supplied together via a distributor-forming feed line 55. The proposed embodiment, a uniform humidification of the wiping roller 11 and 12 is achieved.

The 15 to 18 show in another embodiment, an alternative embodiment of the floor cleaning device 1. This has initially compared to the first embodiment, a structurally smaller tank 17. This is designed in particular flatter, which allows a placement associated with the device surface. Accordingly, the tank 17 extends above the Wiping rollers 11 and 12 and the Nachwischwalze 13, so that the latter viewed in the respective direction of travel compared to the first embodiment can be placed closer to each other. In the illustrated embodiment, the Nachwischwalze 13 is centrally positioned as viewed in the direction of travel between the wiping rollers 11 and 12, further in this embodiment, the Nachwischwalze 13 has a diameter of the wiping roller 11 and 12 corresponding diameter.

In contrast to the first embodiment, in which regardless of the direction of travel always both wiping rollers 11 and 12 have contact with the floor to be cleaned 10, is in the in the FIGS. 15 and 16 illustrated embodiment, a lifting of the inactive, that is not the wiping edge bidding wiper roller 11 or 12 is provided. Accordingly, the inactive wiping roller is lifted from the floor to be cleaned 10, while the other wiping roller, here considered in the direction of travel front wiping roller blocks with the floor to be cleaned 10 cooperatively forms the wiper edge.

This is solved in the illustrated embodiment by the rotatable mounting of the wiping rollers 11 and 12 in a rocker element 56. This has in a side view according to the representations in the Fig. 15 and 18 two rocker arms 57, 58 on. There are in this regard in the region of both side walls of the device such rocker arms 57 and 58 are provided between the free ends of the wiping rollers 11 and 12 extend. The axle body stubs 38 of the wiping rollers 11 and 12 find a rotation of the respective wiping roller permitting receptacle in the region of the free ends of the rocker arms 57, 58. The centrally between the wiper roller axes x receiving receptacles of the rocker arms 57, 58 resulting rocker axis coincides with the axis of rotation y the Nachwischwalze 13. The respective wiper roller axis x and the rocker axis receiving planes E and E 'close to each other to the top of the device opening obtuse angle beta of about 165 °. The plane E is assigned to the wiping roller 11 and the plane E 'of the wiping roller 12.

Depending on the direction of travel r or r 'falls in front of each wiper roller 11 and 12 respectively in the active position down, d. H. in the contact position to be cared for floor 10, in which position also the activated wiping roller 11 and 12 is blocked. This can be achieved in the simplest way by a ratchet-like blocking according to the first embodiment.

About the rocker element 56 in the direction of travel rear wiper roller 11 and 12 is raised and thus distanced from the ground 10 to be cleaned.

The active wiping roller 11 and 12 associated level E and E 'runs at a Nachwischwalze 13 with the same diameter at a parallel distance to be cleaned bottom 10, while the inactive wiping roller 11 and 12 associated level E and E' to increase the wiping roller is pivoted out of the horizontal by the angle alpha of about 15 °, this further while canceling the blocking of the associated wiping roller.

In the raised position, a segmental further rotation of the wiping roller can be achieved in order to offer a new wiping edge at the next change of direction and corresponding lowering of the wiping roller.

The controlled rockers is derived in the illustrated embodiment, depending on the applied by the user forward and Rückhubbewegung. As a result, the wiper device 1 is initially supported by rollers 85 on the floor 10 to be maintained. The stem 6 receiving rotational / tilting joint 9 is guided in the device, further in the region of the tilting joint axis in chassisseitigen slot recesses 89. Accordingly, the tilting joint 9 is a linear displacement, further a substantially parallel Soil displacement allows this to continue over a distance of up to, for example, 15 mm. For this purpose, guide pins 88 engage in the slot recesses 89, which guide pins 88 at the same time receive the tilting axis of the tilting joint 9.

At the tilting joint 9, a control lever 87 is connected. This acts on a steering lever 86, which is rotatably connected to the rocker element 56. The steering lever 86 is in this case positioned in the region of an angle bisector between the rocker arms 57 and 58 and has in the illustrated embodiment, upwards, d. H. turned away from the chassis floor.

During a feed movement of the wiper device 1, a force P is introduced via the handle 6 and thus also via the rotary / tilting joint 9, which causes a limited forward displacement of the rotary / tilting joint 9 relative to the device 1 over a few millimeters, with co-advancement the control lever 87, whereby over the steering lever 86, a tilting of the rocker element 56 in the position shown in FIG Fig. 15 respectively. Fig. 16 is effected. Similarly, a return stroke on the stem 6 is required to move the wiper device 1 in the opposite direction of travel r ', this along with a correspondingly acting return P', which on the displaced pivot joint 9 and the control lever 87, the pivoting of the steering lever 86 beyond the vertical position entails. The rocker element 56 falls accordingly in the position shown in the figures in the FIGS. 17 and 18 ,

By arranging the steering lever 86 with an orientation downward in the direction of the chassis bottom and corresponding arrangement of the steering lever 86, a reversal of the direction of action can be achieved, so that at a feed and corresponding force P the rear wiping roller and at a return stroke with a corresponding force P ' the front wiping roller tilts into the active position.

The Fig. 19 to 21 show a further embodiment for blocking the wiping roller 11 and 12 in the one direction of travel r or r '.

The wiping roller is associated with one end provided with a rotatably connected blocking wheel 60. This is reduced in diameter with respect to the outer diameter of the wiping roller 11, 12 and further axially to the facing end face of the wiping roller 11, 12 while leaving a gap. Facing away from the wiping roller 11, 12 projects beyond the blocking wheel 60 centrally of the axle body stub 38 of the wiping roller 11, 12th

This Achskörperstummel 38 is - optionally as well as the exposed between the wiping roller and lock wheel Achskörperabschnitt- in a slot guide 62 a. This is formed from a chassis portion 70 and extends in the direction of travel r or r '. The at the opposite end of the wiper roller 60 wiper roller end shaped axle stub also lies in a chassis side shaped slot guide, so that the entire wiper roller 11 and 12 in the direction of travel r and r 'in the slot guides 62 relative to the device housing is displaced. This further on a linear dimension, which corresponds to about 1 times to 1.5 times the stub axle diameter.

Assigned to the circumferential surface 71 of the blocking wheel 60, the chassis 16 has a perpendicular to the wiper roller axis x aligned wall 72. This is in the direction of travel r or r ', in which the wiping roller 11 and 12 free-rotating, ie not a wiping edge forming blocked upstream in the direction of wiper roller axis x, this about half a radial dimension of the blocking wheel 60. The down in Direction of the circumferential surface 71 of the blocking wheel 60 facing edge of the chassis wall 72 protrudes downward beyond a zenith of the blocking wheel 60 intersecting Bodenparallele out.

In the Mitlaufstellung the wiper roller 11 and 12 (in the representations of Fig. 19 to 21 the direction of travel r) is the circumferential surface 71 of the blocking wheel 60 to the facing clamping edge 61 of the chassis wall 72 spaced. When changing the direction of travel (here from r to r '), a relative displacement of the wiping roller 11, 12 as shown in FIG FIGS. 20 and 21 , wherein the axle stub 38 are displaced in the slot guides 62 in the direction of the other slot end position. The circumferential surface 71 of the blocking wheel 60 occurs against the clamping edge 61 of the chassis wall 72. Due to this clamping blocks the wiping roller 11, 12 to form a randomly occupied wiping edge position.

In the illustration in Fig. 22 is an exemplary solution for segmental further rotation of the wiping roller 11, 12, optionally shown in a raised position of the roller. The direction of travel of the device 1 is detected in this embodiment by a free-running, the ground to be cleaned 10 contacting impeller 64 whose impeller axis is arranged parallel to the space Wischwalzenachse x.

The impeller 64 carries a parallel to the impeller axis aligned and arranged coaxially with this Ausrückzapfen 65. This serves to cooperate with a chassisseitig content Erten lever 66th

The lever 66 is supported in the illustrated embodiment tiltably about a parallel to the wiper roller axis x aligned axis on a carriage 73. The carriage movement is directed in the direction of travel r or r '.

The carriage 73 interacts with a slide guide 74 fixed on the chassis side, whereby the slide 73 and hereof the lever 66 is loaded into a basic position by means of a compression spring 75 acting on the slide 73 in the slide guide 74.

The lever 66 is held about the middle of its longitudinal extension considered in the direction of travel tiltably on the carriage 73. The in the direction of action of the compression spring 75 facing end of the lever 66 is formed as a driving shoulder 76. This protrudes in the basic position as in Fig. 22 shown in the circular path of movement of the Ausrückzapfens 65th

That the driving shoulder 76 facing away from the front end of the lever 66 is provided with a in the illustrated embodiment, down in the direction of the floor to be cared 10 driving projection 67. This is tooth-shaped in cross-section. This end portion of the lever 66 is loaded by a top-acting, provided between the lever 66 and an associated carriage ceiling compression spring 77.

The driving projection 67 cooperates with the toothing 78 of a toothed wheel 68. This gear 68 in turn meshes with a driven gear 79 of reduced diameter. This is rotatably connected to the wiping roller 11 and 12 respectively.

In a taken-in direction of travel, the rotation of the impeller 64 according to the arrow a in Fig. 22 causes the release pin 65 overflows in the course of its circular motion, the driving shoulder 76 of the lever 66 in its normal position.

In a change of direction and corresponding rotation of the impeller 64 according to the arrow b, the action of the driving shoulder 76 causes by the Ausrückzapfen 65, a linear movement of the lever 66 together with the carriage 73 against the force of the compression spring 75, which on the engagement of driving projection 67 and toothing 78th Further, due to the pressure load on the spring 77, a rotational displacement of the gear 68 by a predetermined angular amount, so here by the angular amount of two adjacent tooth gaps of the teeth 78 to each other. About the output gear 79 is correspondingly the wiping roller 11 and 12 rotated by a predefined angle, so that a new wiping edge is offered.

The vorverlagerte position of the lever 66 is secured by overrunning the driving shoulder 76 of the release pin 65. For this purpose, a pawl 69 is provided. This is likewise rotationally supported on the chassis side, with an axis of rotation which is aligned parallel to the tilt axis of the lever 66. The pawl 69 has a fork-shaped locking portion 80. This fork-shaped locking portion 80 accommodates in the pre-displaced lever position a locking shoulder 81 formed by a deflection section of the lever 66 in the region of the driving shoulder 76. A simultaneously formed on the pawl 69 release lever 82 is overrun in this blocking position by the further moving on a circular line Ausrückzapfen 65 without effect on the lever 66.

In the new direction of travel and concomitant rotation of the impeller 64 in the direction of travel r of the release pin 65 meets the facing inner edge of the release lever 82, which initially causes over the locking portion 80 of the pawl 69 tilting of the lever about the tilt axis by depression of the locking shoulder area. Accordingly, the opposite end is raised with the driving projection 67 against the force of the compression spring 77, to cancel the teeth between gear 68 and driving projection 67. The force acting in the direction of travel spring 75 also pushes the carriage 73 with the lever 66 back to the starting position, which under Release of the pawl 69 by the further drehverlagernden release pin 65 of the lever 66 and the driving projection 67 for engagement in the next tooth gap of the gear 68 drops. Thus, the displacement of the wiping roller 11 and 12 at the next change in direction by the predetermined angular extent according to the distance between two adjacent tooth gaps of the gear 68 is prepared taking into account the achieved by the gears 68 and 79 translation.

The described household floor cleaning device 1 is designed for sucking and misting wiping hard surfaces of all kinds, so in particular tile floors, laminate or parquet floors, but also stoneware floors. The cleaning of inclined surface up to vertical surfaces is possible. The dampening process is always preceded by a suction, in particular for receiving coarse dirt particles to fine dust.

All disclosed features are essential to the invention. The disclosure of the associated / attached priority documents (copy of the prior application) is hereby also incorporated in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application.

Claims (15)

1. Displaceable domestic floor-cleaning appliance (1), comprising a mopping roller (11), it being possible to move the appliance (1) in conventional manner in two directions (r, r') of travel which are opposite to one another, whereby two mopping rollers (11, 12) are provided which are spaced apart in the direction (r) of travel and which can both rotate, but of which at least one blocks at least in one direction (r, r') of travel of the appliance (1) characterized in that the unblocked mopping roller (11, 12) is raised into a position which is at a vertical spacing from the floor (10) to be treated, whereas the blocked mopping roller (11, 12) is supported on the floor (10).
2. Displaceable domestic floor-cleaning appliance (1) according to Claim 1, characterized in that a third driven post-mopping roller (13) is disposed between the two driven mopping rollers (11, 12).
3. Displaceable domestic floor-cleaning appliance (1) according to Claim 1 or 2, characterized in that a suction means is provided, that the suction is provided such that it is restricted to the region of one or two mopping rollers (11, 12) and that it is possible to switch over the suction as a function of the direction (r, r') of travel when there are two suction regions (22, 23) which are at a distance from one another in the direction (r) of travel in accordance with the spacing of the mopping rollers (11, 12).
4. Domestic floor-cleaning applicance according to one of the preceding claims, characterized in that the blocking mopping roller (11, 12) has a portion which is provided with a sawtooth feature (42, 43) and interacts, in a blocking manner, only in one direction (r, r') of travel, with a latching finger (44, 45) which is secured to the housing in a spring-biased manner.
5. Domestic floor-cleaning appliance according to one of the preceding claims, characterized in that the blocking mopping roller (11, 12) is mounted in slotted guides (62) which are oriented in the direction (r, r') of travel and has a blocking wheel (60) which is connected to the roller in a rotationally fixed manner and interacts with an appliance housing-side clamping edge (61) after relative displacement of the mopping roller (11, 12) in the guides (62) in order to block rotation of the mopping roller (11, 12).
6. Domestic floor-cleaning appliance according to one of the preceding claims, characterized in that the two mopping rollers (11, 12) are mounted in a common rocker element (56), with a rocker axis which runs parallel in space to the mopping roller axes (x).
7. Domestic floor-cleaning appliance according to Claim 6, characterized in that the planes (E, E') which incorporate the respective mopping roller axis (x) and the rocker axis enclose an obtuse angle (β) with respect to one another.
8. Domestic floor-cleaning appliance according to one of the preceding claims, characterized in that a freely-running wheel (64) is provided which detects the travelling movement of the appliance (1) and either causes or arranges for displacement of the mopping roller (11, 12) through a predetermined angle as a function of the direction (r, r') of travel.
9. Domestic floor-cleaning appliance according to Claim 8, characterized in that the freely-running wheel (64) acts on a displaceable lever (66) by means of a disengagement pin (65) for the purpose of displacing the mopping roller (11, 12) through a predetermined angle.
10. Domestic floor-cleaning appliance according to Claim 9, characterized in that the lever (66) has a drive projection (67) which interacts with a gearwheel (68) which can drive the mopping roller (11, 12).
11. Displaceable domestic floor-cleaning appliance (1) according to one of the preceding claims, characterized by two mopping rollers (11, 12) which are spaced apart in the direction (r) of travel and are each wettable, and a post-mopping roller (13) which is disposed between the wettable mopping rollers (11, 12).
12. Displaceable domestic floor-cleaning appliance (1) according to Claim 11, characterized in that the post-mopping roller (13) can be wetted.
13. Domestic floor-cleaning appliance according to one of the Claims 11 or 12, characterized in that the post-mopping roller (13) has a larger diameter than one or both of the wettable mopping rollers (11, 12).
14. Domestic floor-cleaning appliance according to one of the Claims 11-13, characterized in that the post-mopping roller (13) has a smaller diameter than, or an identical diameter to, one or both of the mopping rollers (11, 12).
15. Domestic floor-cleaning appliance according to one of the preceding claims, characterized in that a rotational position which is changed compared to the last blocking position of the blocked mopping roller (11, 12) is established on this mopping roller (11, 12) as a function of a change in the direction of travel.

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