EP2941996A1 - Floor cleaning machine - Google Patents

Abstract

A floor cleaning machine, comprising a supporting structure (2) that has, along a forward travel direction (3) of the machine, a front part (2a) and a rear part (2b) and supports a brush (4), which can be actuated rotationally, about a rotation axis (4a) that is arranged substantially vertically in use, and a squeegee (7) located in a rear position with respect to the brush (4) along the forward travel direction (3) of the machine; the squeegee (7) is mounted rotatably about an oscillation axis that is substantially parallel to the rotation axis (4a) of the brush (4) and connection means (8) are provided which can be activated on command and are adapted to couple rigidly the squeegee (7) to the brush (4) in its rotation about the rotation axis (4a), in order to move the squeegee (7) from the rear position to a forward position with respect to the brush (4), along the forward travel direction (3) of the machine.

Description

• The present invention relates to a floor cleaning machine.
• Floor cleaning machines are known which are equipped with a brush that rotates about a vertical axis and are provided with at least one nozzle for dispensing a washing liquid.
• Furthermore, these machines have a squeegee, which is arranged in a rear position with respect to the brush along the forward travel direction of the machine and slides in contact with the floor, allowing to collect the washing liquid and the dirt removed by the action of the brush so that they can be picked up by an intake, associated with the machine, so as to leave the floor dry and clean during the forward travel of the machine.
• This type of machine suffers the drawback that when it is moved backward, i.e., in the opposite direction with respect to their normal forward travel direction, they leave the floor wet, since the squeegee is unable, in this situation, to collect the washing liquid released by the dispensing nozzle.
• The aim of the present invention is to solve this drawback, by providing a floor cleaning machine that allows the squeegee to collect the washing liquid and dirt even when the machine is moved in the opposite direction with respect to its forward travel direction.
• Within this aim, an object of the invention is to provide a floor cleaning machine that can be practical to use for the user.
• Another object of the present invention is to provide a floor cleaning machine that has an extremely simple structure.
• This aim and these and other objects that will become better apparent hereinafter are achieved by the floor cleaning machine according to the invention as defined inclaim 1.
• Further characteristics and advantages will become better apparent from the description of a preferred but not exclusive embodiment of the floor cleaning machine according to the invention, illustrated by way of nonlimiting example in the accompanying drawings, wherein:
• Figure 1 is a schematic side elevation view of the machine according to the invention, with parts omitted for the sake of simplicity;
• Figure 2 is a side elevation view of the machine according to the invention, in which a portion is shown in cross-section along a vertical plane;
• Figure 3 is a side elevation view of the machine according to the invention in the inclined position, with its front part raised;
• Figure 4 is a view of the machine in the condition ofFigure 3, with a part shown in cross-section along a vertical plane;
• Figure 5 is an enlarged-scale view of a detail ofFigure 4;
• Figure 6 is a side view of the machine according to the invention in the inclined condition ofFigure 3, in which the squeegee is located in front of the brush;
• Figure 7 is a side elevation view of machine according to the invention in a condition in which it is not tilted;
• Figure 8 is a sectional view of the machine according to the invention, taken along a vertical plane and in a backward-tilted condition, with its front part raised;
• Figure 9 is a top plan view of the machine according to the invention, with the squeegee arranged in a forward position.
• With reference to the figures, a floor cleaning machine according to the invention, designated generally by thereference numeral 1, comprises a supportingstructure 2, which has, along aforward travel direction 3 of the machine, afront part 2a and arear part 2b.
• In particular, the supportingstructure 2, on its side directed toward thefloor 100, supports abrush 4, which can be actuated by motor means 5 with a rotary motion about arotation axis 4a that is arranged, during use, substantially vertically.
• In particular, thebrush 4 can, for example, be constituted by adisk 6a that can be coupled detachably to the actuation shaft of the motor means 5.Bristles 6b are anchored to thedisk 6a and are intended to act by friction on thefloor 100.
• Optionally, one or more nozzles for dispensing a washing liquid can be associated with the supportingstructure 2.
• Asqueegee 7 is further associated with the supportingstructure 2 and is located in the rear position with respect to thebrush 4 along theforward travel direction 3 of the machine.
• In particular, according to the illustrated example, thesqueegee 7 is formed as usual by an arc-like supportingbody 7a, which is extended around a portion of thebrush 4 and to which one or moreflexible laminas 7b, intended to slide on thefloor 100, are coupled.
• According to the invention, thesqueegee 7 is mounted so that it can rotate about an oscillation axis that is substantially parallel to or, more preferably, substantially coincides with therotation axis 4a of thebrush 4.
• Also according to the invention, there are connection means 8, which can be activated on command and are adapted to integrally associate thesqueegee 7 with thebrush 4, so that thesqueegee 7 can be turned by the brush about its oscillation axis, so as to move thesqueegee 7 from the position behind thebrush 4, along theforward travel direction 3 of the machine, to a diametrically opposite position, in which it is arranged in practice in front of said brush, again along theforward travel direction 3 of the machine.
• In this manner, once thesqueegee 7 has been moved to said front position, it is possible to move the supportingstructure 2 in the opposite direction with respect to theforward travel direction 3, i.e., backwards or in reverse, with thesqueegee 7 always in a position behind thebrush 4 and therefore capable of acting on thefloor 100 after thebrush 4, so as to be able to collect effectively the washing liquid emitted by the dispensing nozzles and the dirt removed by thebrush 4, leaving thefloor 100 dry and clean.
• Advantageously, the connection means 8 can be activated by tilting the supportingstructure 2, lifting itsfront part 2a from thefloor 100, with respect to itsrear part 2b, as shown in particular inFigure 8.
• For example, this tilt of the supportingstructure 2 can be achieved by the user by using as a lever anelongated handle 20, which rises upward from therear part 2b of the supporting structure and by pivoting onwheels 21, conveniently associated with therear part 2b of the supportingstructure 2, in a position that lies behind the assembly constituted by thebrush 4 and by thesqueegee 7.
• In particular, the user, by pushing downward on the grip end 20a of thehandle 20, can rotate the supportingstructure 2 around the region of contact with thefloor 100 of its rear part, constituted by thewheels 21, so as to raise from the floor itsfront part 2a with respect to itsrear part 2b, as shown by way of example inFigure 3 and inFigure 8.
• Advantageously, stop means are also provided which are adapted to stop the rotation performed by thesqueegee 7 integrally with thebrush 4 when thesqueegee 7 is located at the front position, preventing it from continuing beyond in rotation.
• For example, the stop means can be constituted by a resting surface, which is formed in thefront part 2b of the supportingstructure 2 and is intended to be engaged by abutment by a portion of thesqueegee 7.
• As shown, thesqueegee 7 conveniently is connected to an end of a supportingarm 9, which is pivoted, at its other end, to the supportingstructure 2 about the oscillation axis of thesqueegee 7.
• Advantageously, the connection means 8 comprise afriction body 10, which is supported by the supportingarm 9 and is adapted to make contact with thebrush 4, following the activation of the connection means 8, so as to integrally couple the supportingarm 9 and therefore the squeegee 7 with respect to the brush.
• More particularly, the supportingarm 9 can rotate with respect to the supportingstructure 2 also about anarticulation axis 9a that is substantially perpendicular to said oscillation axis of thesqueegee 7, in order to allow thefriction body 10 to pass from an inactive condition, shown in particular inFigure 2, in which it is disengaged from thebrush 4, when the supportingstructure 2 is in a position that is not inclined with respect to the floor, to an active condition, in which thefriction body 10 is supported in contact with friction against thebrush 4 when the supportingstructure 2 is moved to an inclined condition with lifting of itsfront part 2a from thefloor 100 with respect to itsrear part 2b and vice versa.
• In particular, thefriction body 10 is arranged so as to face the upper face of thedisk 6a of thebrush 4, so as to be able to make contact with it when it is in its active condition.
• Conveniently, thefriction body 10 can be made of elastically yielding material, such as for example rubber or the like, and for example can be fixed to the supportingarm 9 by means of a threadedportion 10a, which is integral therewith and can be engaged by a lockingnut 10b.
• Operation of the machine according to the invention is as follows.
• In order to clean thefloor 100, the motor means 5 of thebrush 4 are activated so that it can move with a rotary motion about itsown rotation axis 4a.
• By causing the advancement of the supportingstructure 2 along theforward travel direction 3, thebrush 4 acts progressively on the various regions of thefloor 100, removing the dirt that is present with the aid of the washing liquid emitted by the dispensing nozzles, and thesqueegee 7 collects the washing liquid and the removed dirt.
• In this situation, the supporting structure is in a condition that is not inclined with respect to thefloor 100 and thefriction body 10 is spaced from thebrush 4 and accordingly thesqueegee 7 is uncoupled with respect to the rotation of thebrush 4.
• If the user wishes to move the supportingstructure 2 in the opposite direction with respect to theforward travel direction 3, he/she first of all tilts the supportingstructure 2 so as to raise itsfront part 2a from thefloor 100 with respect to therear part 2b, pivoting on the wheels, as shown inFigure 8.
• By doing so, thebrush 4 and thesqueegee 7 rise from thefloor 100 and, by losing contact with thefloor 100, rotate, due to its own weight, the supportingarm 9 about thearticulation axis 9a, with consequent approach of thefriction body 10 to thedisk 6a of thebrush 4 until thefriction body 10 makes contact with thedisc 6a of thebrush 4.
• Once thefriction body 10 has made contact with thedisc 6a of thebrush 4, thesqueegee 7 is turned by thebrush 4 about its own oscillation axis, thus moving from the position behind the brush to the position in front of said brush, remaining in this position thanks to its retention caused by the stop means.
• At this point the user can return the supportingstructure 2 to a non-tilted condition, lowering again thefront part 2a of the supportingstructure 2 and then, as shown inFigure 9, can move the machine in the opposite direction with respect to theforward travel direction 3, thesqueegee 7 being always able to operate in a position that lies behind thebrush 4.
• To then return thesqueegee 7 back to the rear position, it is sufficient for the user to move the machine in theforward travel direction 3 in order to achieve the automatic rotation of thesqueegee 7 about its own oscillation axis from the front position to the rear position, due to the friction of thesqueegee 7 with thefloor 100.
• From what has been described above it is evident that the invention is capable of achieving fully the intended aim, since it allows to clean the floor both by making the machine travel in its normal forward travel direction and by moving it in the opposite direction.
• All the characteristics of the invention indicated above as advantageous, convenient or the like may also be omitted or be replaced with equivalents.
• The individual characteristics described with reference to general teachings or particular embodiments may all be present in other embodiments or may replace characteristics in these embodiments.
• The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims.
• In practice, the materials used, so long as they are compatible with the specific use, as well as the shapes and dimensions, may be any according to requirements.
• All the details may further be replaced with other technically equivalent elements.
• The disclosures in Italian Patent Application No.VR2014A000120 from which this application claims priority are incorporated herein by reference.
• Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.

Claims (6)

1. A floor cleaning machine, comprising a supporting structure (2) that has, along a forward travel direction (3) of the machine, a front part (2a) and a rear part (2b), said supporting structure (2) supporting a brush (4), which can be actuated rotationally, about a rotation axis (4a) that is arranged substantially vertically in use, and a squeegee (7) located in a rear position with respect to said brush (4) along said forward travel direction (3) of the machine,characterized in that said squeegee (7) is mounted rotatably about an oscillation axis that is substantially parallel to said rotation axis (4a) of said brush (4), connection means (8) being provided which can be activated on command and are adapted to couple rigidly said squeegee (7) to said brush (4) in rotation about said rotation axis (4a), in order to move said squeegee (7) from said rear position to a forward position with respect to said brush (4), along said forward travel direction (3) of the machine.
2. The machine according to claim 1,characterized in that said connection means (8) can be activated by means of an inclination of said supporting structure (2), with lifting of said front part (2a) from the floor with respect to said rear part (2b).
3. The machine according to one or more of the preceding claims,characterized in that it comprises stop means adapted to stop the integral rotation of said squeegee (7) with said brush (4) at said front position.
4. The machine according to one or more of the preceding claims,characterized in that said squeegee (7) is connected to one end of a supporting arm (9) that is pivoted, at its other end, to said supporting structure (2) about said oscillation axis.
5. The machine according to one or more of the preceding claims,characterized in that said connection means (8) comprise a friction body (10) that is supported by said supporting arm (9) and is adapted to make contact with said brush (4), so as to render said supporting arm (9) integral with said brush (4).
6. The machine according to one or more of the preceding claims,characterized in that said supporting arm (9) can rotate with respect to said supporting structure (2) about an articulation axis (9a) that is substantially perpendicular to said oscillation axis, in order to allow said friction body (10) to pass from an inactive condition, in which it is disengaged from said brush (4), with said supporting structure (2) in a non-tilted condition, to an active condition, in which said friction body (10) is in contact with friction against said brush (4), with said supporting structure (2) in the inclined condition, with lifting of said front part (2a) from the floor with respect to said rear part (2b), and vice versa.

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