EP2678478B1 - Mobile sweeping machine with at least one side brush - Google Patents

Description

The invention relates to a mobile sweeping machine for sweeping a floor surface having the features of the preamble of claim 1.

By means of such sweeping machines, a floor surface can be swept, for example, a walkway, a road or the floor surface of a factory floor. By means of a Kehrgutaufnahmeeinrichtung debris can be absorbed by the floor surface to be cleaned and transferred to a hopper, which can be acted upon by a suction unit with negative pressure. In the flow path between the hopper and the suction unit a Staubabscheideeinrichtung is arranged, with the aid of dust and dirt particles can be separated from the sucked air. The sweep receiving device may for example comprise a suction mouth, which is arranged at the free end of a suction tube, so that the bottom surface can be sucked. Alternatively or additionally, at least one brush roller can be used, which can be rotated about a horizontal axis of rotation and with the aid of which the debris can be picked up from the bottom surface and transferred to the hopper. In addition, at least one side brush is used, which can be rotated about a nearly vertically oriented axis of rotation and protrudes laterally beyond the outer contour of the sweeper. With the help of the side broom, for example, a gutter can be swept, wherein the debris can be transferred by means of the side brush in the direction of a longitudinally aligned center axis of the sweeper, so that the debris can then be detected by the sweeping material receiving device and transferred to the hopper.

The use of the at least one side broom is often associated with a considerable amount of dust. In order to keep the dust low, is in the US 2009/0090385 A1 proposed to associate each side broom with a dust duct over which the whirled up from the side brush Dust can be guided to Kehrgutaufnahmeeinrichtung. The dust guide channel comprises a first channel side wall and a second channel side wall, which are connected to each other via a duct ceiling wall. At the US 2009/0090385 A1 known sweeper, the side brush is arranged in the dust duct, so that the axis of rotation of the side brush between the first and the second channel side wall is located. The dust guide channel surrounds the side brushes in the manner of a housing and extends to the sweeping material receiving device, via which the dust guide channel is in flow communication with the dust separation device.

Although providing a housing for the side brush makes it possible to minimize the dust generation when using the side broom, but it is a considerable amount of energy in the form of a very powerful suction unit required to cause sufficient suction flow within the dust duct.

From the GB 2 420 813 A is a mobile sweeper with the features of the preamble of claim 1 known. In this sweeper two arranged in the direction of travel of the sweeper at the same height side brushes are used, which protrude beyond the outer contour of the sweeper. In the direction of travel behind the axes of rotation of the side brush a sweeping material receiving device in the form of a suction nozzle is arranged in a central region of the sweeper, which has two side walls and a ceiling wall. The suction nozzle is connected via a suction line with a hopper in flow communication, which can be acted upon by a suction unit with negative pressure. In the flow path between the hopper and the suction unit a Staubabscheideeinrichtung is positioned in the form of a cyclone. The two side walls of the suction nozzle form, together with the top wall, a dust guide channel, wherein in each case one side wall extends into the region between the axis of rotation of a side brush and the other side wall.

Object of the present invention is to develop a mobile sweeper of the generic type such that the detection of the whirled up dust from the side brush can be done with less energy use.

This object is achieved by a mobile sweeper with the features of claim 1.

In the sweeping machine according to the invention, the first channel side wall and the second channel side wall are arranged on the same side of the side brush, to which the dust guide channel is assigned. The axis of rotation of the side broom is located outside the dust duct, to which the fluidized dust can be supplied by the side brush. The distance between the two channel side walls can be chosen relatively small, in particular, it can be chosen considerably smaller than the diameter of the side broom. As a result, the flow cross section of the dust guide channel can be chosen to be relatively small, and this in turn means that a considerable suction flow can form within the dust guide channel, without requiring a considerable amount of energy. Under the effect of the suction flow, the dust raised by the side brush may be supplied to the dust collecting device, so that the fluidized dust may be separated.

According to the invention, the at least one side brush, to which a dust guide channel is assigned, dips along a partial area of its outer circumference into the dust guide channel. This allows a particularly effective transfer of the fluidized dust in the dust duct. The subregion of the outer circumference of the side broom immersed in the dust guide channel may, for example, extend over an angular range of at least 30 °, advantageously over an angular range of less than 90 °, for example over an angular range of 40 ° to 70 °.

The Staubabscheideeinrichtung may for example comprise at least one filter. Alternatively or additionally, the Staubabscheideeinrichtung include a cyclone, with the aid of which the dust can be separated from the sucked air.

The distance between the two channel side walls can be selected smaller than the radius of the side brush, which is assigned to the dust duct. For example, it may be provided that the distance between the two channel side walls is smaller than half the radius of the side brush, the distance may be, for example, a third to a quarter of the radius of the side broom.

The sweeping machine according to the invention may have a single side brush and this side brush may be associated with a dust duct. It can also be provided that the sweeper has a plurality of side brushes, wherein at least one side brushes a dust guide channel is assigned. In particular, each side brush of the sweeper may be assigned a separate dust duct. It can also be provided that the sweeper has at least two side brushes, which is associated with a common dust duct. The at least two side brushes with a common dust duct can be arranged one behind the other in the direction of travel of the sweeper.

In a particularly preferred embodiment of the sweeping machine according to the invention, the at least one side brush, which is assigned a dust guide channel, engages under the first channel side wall of the associated dust guide channel, wherein the first channel side wall between the axis of rotation of the side brush and the second channel side wall is arranged. In the region in which the first channel sidewall is engaged by the side brush, the first channel sidewall may be spaced from the bottom surface, ie, the first channel sidewall may define a lateral opening of the dust duct over which the side brush is inserted into the dust duct along a portion of its outer periphery.

Conveniently, the dust duct is positioned between the axis of rotation of the associated side brush and a longitudinally aligned central axis of the sweeper.

The second channel side wall extends in an advantageous embodiment of the invention in the amount of the associated side broom to the bottom surface.

In particular, it can be provided that the second channel side wall is inclined inwardly in its direction of the bottom surface edge region in the dust duct. This has the advantage that with the help of the second channel side wall dust can be lifted from the floor surface by the inclined edge region of the second channel side wall slides along the bottom surface.

The second channel side wall is conveniently made at least at the level of the associated side broom of an elastically deformable material. In the amount of the associated side brush, the second channel side wall may extend to the floor surface to be cleaned and slide along this, for example, in the manner of a sealing lip.

The first channel side wall is made in a preferred embodiment of the invention, at least in the amount of the associated side broom made of an elastically deformable material. It can be at the level of the side brush a distance from the floor surface to be cleaned and thus form a lateral opening of the dust duct over which the associated side brush along a portion of its outer periphery can enter the dust duct.

The dust duct is favorably aligned at least in the amount of the associated side brush obliquely to the longitudinally aligned center axis of the sweeper. The angle of inclination of the dust guide channel to the central axis is advantageously 5 ° to 30 °.

It is advantageous if the dust guide channel is inclined at least in the amount of the associated side brush in the direction of the side brush.

A particularly effective detection of the dust raised by the side brush is achieved in a preferred embodiment in that the dust duct is open at its front end facing away from the sweeping material receiving device. About the front end can occur while driving the sweeper of the wind in the dust duct, so that the dust introduced by the side brush in the dust duct can be particularly effectively supplied to the Staubabscheideeinrichtung.

It is advantageous if the dust duct projecting forward relative to the direction of travel of the sweeper on the associated side brush.

Advantageously, the dust duct is made in its over the side brush protruding end of an elastically deformable material. This reduces the risk of damaging the dust duct when the sweeper hits an obstacle.

It is particularly advantageous if the channel side walls of at least one dust guide channel are adjustable relative to the bottom surface. This gives the possibility to change the position of the channel side walls relative to the bottom surface. If the channel side walls wear on their edge area facing the bottom surface, the channel side walls can be readjusted.

It is particularly advantageous if the second channel side wall, which is arranged on the side of the first channel side wall facing away from the associated side brush, has a projection to the bottom surface, so that it protrudes at the Sliding floor surface. The supernatant may be, for example, 3 mm to 15 mm.

The two channel side walls preferably run parallel to one another.

The distance of the channel side walls is in an advantageous embodiment 4 cm to 15 cm.

The duct ceiling wall, in a preferred embodiment of the invention, at least at the level of the associated side broom to the bottom surface at a distance of 8 cm to 40 cm.

At least one dust duct can run along the bottom surface over its entire length. However, it can also be provided that at least one dust guide channel has a rear end region, which is arranged at a distance from the bottom surface in relation to the direction of travel, in that, in addition to the two channel side walls and the channel ceiling wall, the dust guide channel has a channel bottom wall arranged at a distance from the bottom surface. The channel bottom wall may extend, for example, from the sweeping material receiving device or the hopper up to the level of the rear end region of the associated side brush in the direction of travel.

The channel bottom wall of the dust guide channel preferably has a distance of at least 7 cm from the bottom surface.

When using a arranged at a distance from the bottom surface channel bottom wall of a dust duct, it is advantageous if the dust duct has a arranged in the direction of travel of the sweeper at the front end of the channel bottom wall channel wall which extends to the bottom surface and conveniently has a projection to the bottom surface. The rear wall of the channel delimits at the rear a channel section which is open to the floor surface of the dust-carrying channel. The open channel section extends in height of the associated side broom, conveniently the open channel section extends in the direction of travel forward to the free end of the associated dust duct. Contrary to the direction of travel of the sweeper can connect to the open channel portion of the dust duct a bottom-side closed channel section with a channel bottom wall, which is arranged at a distance from the bottom surface. The closed channel section can in particular open into the sweeping material receiving device or the sweeping material container or, for example, into a suction line, via which the dust guide channel is connected to the dust separation device.

As already mentioned, the sweeping material receiving device may have a sweeping roller rotatable about a horizontal axis of rotation. The broom is conveniently surrounded by a sweeping box. At least one dust duct can open into the sweeping box.

It is advantageous if at least one dust duct opens into the hopper. Such a configuration is particularly advantageous when the hopper is arranged in the direction of travel of the sweeper in front of a sweeping roller of Kehrgutaufnahmeeinrichtung.

It can be provided that the sweeping material receiving device comprises a suction mouth for sucking debris from the bottom surface to be swept, the suction mouth being connected to the sweepings container via a suction line. At least one dust duct can open into the suction line.

In a particularly preferred embodiment of the invention, a front cover is arranged in the direction of travel of the sweeper before at least one side brush, which is associated with a dust duct. The use of a front cover allows an additional reduction of dust generation when using the side broom. The front cover can oppose Connect the direction of rotation of the side brush to the first channel side wall of the assigned dust duct.

The front cover is suitably oriented at an angle of 55 ° to 90 ° to the longitudinally aligned central axis of the sweeper.

Preferably, the front cover extends to the bottom surface, d. H. it can rest on the floor surface.

It is advantageous if the front cover is inclined in its side facing the bottom surface edge region in the direction of the side brush. In particular, it can be provided that the front cover has a projection to the bottom surface and slides along the bottom surface.

Preferably, the front cover is made of an elastically deformable material.

It is particularly advantageous if the front cover is held on an elastically deformable holder. This reduces the risk of damage to the front cover if the sweeper hits an obstacle. The elastically deformable holder may for example comprise a helical spring, which is favorably oriented horizontally or vertically.

A particularly effective reduction of dust is achieved in an advantageous embodiment in that from the side brush facing the rear side of the front cover protrudes a rib, which has a distance from the bottom surface. The rib preferably extends over the entire length of the front cover.

Conveniently, the rib projecting from the front cover on the rear side covers over a partial area of the outer circumference of the side brush free ends of the bristles of the side broom. The side brush thus plunges along a portion of its outer periphery into an area that extends along the back of the front cover and is covered by the protruding rib. Over this area, the dust raised from the bottom surface can be fed to the dust guide channel which adjoins the front cover in the direction of rotation of the side brush.

Figur 1:

eine teilweise geschnittene Seitenansicht einer ersten Ausführungsform einer fahrbaren Kehrmaschine mit einem Seitenbesen, dem ein Staubführungskanal und eine Frontabdeckung zugeordnet sind;

Figur 2:

eine schematische Veranschaulichung des Zusammenwirkens des Seitenbesens aus Figur 1 mit der Frontabdeckung und dem Staubführungskanal;

Figur 3:

eine Schnittansicht des Staubführungskanals längs der Linie 3-3 in Figur 2;

Figur 4:

eine Schnittansicht des Staubführungskanals längs der Linie 4-4 in Figur 2:

Figur 5:

eine Schnittansicht des Staubführungskanals längs der Linie 5-5 in Figur 2;

Figur 6:

eine Schnittansicht der Frontabdeckung längs der Linie 6-6 in Figur 2;

Figur 7:

eine Schnittansicht der Frontabdeckung entsprechend Figur 6, wobei die Frontabdeckung an einer alternativen Halterung gehalten ist;

Figur 8:

eine Schnittansicht des Staubführungskanals längs der Linie 8-8 in Figur 2;

Figur 9:

eine Schnittansicht gemäß Figur 8 einer ersten alternativen Ausgestaltung des Staubführungskanals;

Figur 10:

eine Schnittansicht gemäß Figur 8 einer zweiten alternativen Ausgestaltung des Staubführungskanals;

Figur 11:

eine Schnittansicht entsprechend Figur 8 einer dritten alternativen Ausgestaltung des Staubführungskanals;

Figur 12:

eine schematische Veranschaulichung des Zusammenwirkens des Seitenbesens mit der Frontabdeckung und dem Staubführungskanal bei einer zweiten Ausführungsform der Kehrmaschine, und

Figur 13:

eine teilweise geschnittene Seitenansicht einer dritten Ausführungsform der Kehrmaschine.

The following description of preferred embodiments of the invention is used in conjunction with the drawings for further explanation. Show it:

FIG. 1:

a partially sectioned side view of a first embodiment of a mobile sweeper with a side brush, which are associated with a dust duct and a front cover;

FIG. 2:

a schematic illustration of the interaction of the side broom FIG. 1 with the front cover and the dust duct;

FIG. 3:

a sectional view of the dust guide channel along the line 3-3 in FIG. 2 ;

FIG. 4:

a sectional view of the dust guide channel along the line 4-4 in FIG. 2 :

FIG. 5:

a sectional view of the dust guide channel along the line 5-5 in FIG. 2 ;

FIG. 6:

a sectional view of the front cover along the line 6-6 in FIG. 2 ;

FIG. 7:

a sectional view of the front cover accordingly FIG. 6 wherein the front cover is held on an alternative support;

FIG. 8:

a sectional view of the dust guide channel along the line 8-8 in FIG. 2 ;

FIG. 9:

a sectional view according to FIG. 8 a first alternative embodiment of the dust duct;

FIG. 10:

a sectional view according to FIG. 8 a second alternative embodiment of the dust duct;

FIG. 11:

a sectional view accordingly FIG. 8 a third alternative embodiment of the dust duct;

FIG. 12:

a schematic illustration of the interaction of the side brush with the front cover and the dust duct in a second embodiment of the sweeper, and

FIG. 13:

a partially sectioned side view of a third embodiment of the sweeper.

In the FIGS. 1 to 11 is schematically illustrated a first embodiment of a mobile sweeping machine according to the invention, which is generally occupied by the reference numeral 10. It comprises a chassis 12, on which a steerable front wheel 14 and two rotatable about a common axis of rotation rear wheels are mounted, wherein in FIG. 1 only one rear wheel 16 is shown. By means of a drive motor, not shown in the drawing, the sweeper 10 can be moved along a floor surface 18 to be swept. The user can sit on a driver's seat 20 and steer the sweeper 10 by means of a steering wheel 22.

Between the rear wheels 16 and the front wheel 14, a Kehrgutaufnahmeeinrichtung 24 is arranged on the underside of the chassis 12 with a about a horizontal axis of rotation 26 rotatable sweeping roller 28 which is surrounded by a sweeping box 30. The sweeping box 30 has an arcuate curved end wall 32, to which, opposite to the direction of travel 34 of the sweeper 10, a ceiling wall 36 connects. The back of the sweeping box 30 is bounded by a rear wall 38 which has a distance from the ceiling wall 36. To the rear wall 38, opposite to the direction of travel 34 is followed by a dirt hopper 40 which is in fluid communication with a suction unit 44 via a suction channel 42. At the inlet 46 of the suction channel 42, a Staubabscheideeinrichtung arranged in the form of a filter 48. By means of the suction unit 44, the hopper 40 can be subjected to negative pressure, so that a suction flows from the sweeping box 30 via the hopper 40 and the suction channel 42 to the suction unit 44th The suction air flows through the filter 48, whereby dust and dirt particles can be separated by means of the filter 48. From the suction unit 44, the sucked suction air can be discharged through outlet ports 50 to the environment.

Laterally next to the front wheel 14, a side brush 52 is rotatably mounted about a nearly vertically oriented axis of rotation 54. The side brush 52 is designed as a plate brush and comprises a plurality of bristles 56 which are fixed to a brush plate 58 and aligned obliquely to the axis of rotation 54. Such side brushes are known per se to those skilled in the art.

The side brush 52 protrudes laterally beyond the outer contour of the sweeper 10 and allows, for example sweeping a gutter, the debris can be moved due to the direction of rotation 60 of the side brush 52 in the direction of the longitudinally aligned central axis 62 of the sweeper 10, so that the debris then in the further drive of the sweeper 10 of the Sweeping roller 28 is received and can be transferred to the hopper 40.

In order to keep the dust development low when using the side brush 52, the sweeping machine 10 has a dust guide channel 64 which is associated with the side brush 52 in such a manner that the dust raised by the side brush 52 can be conveyed via the dust receiving device 24 to the dust removal device (filter 48) by means of the dust guide channel 64. can be supplied. The dust guide channel 64 has a rectilinear first channel section 66, which extends from an orifice 68 on the end wall 32 of the sweeping box 30 and extends parallel to the central axis 62. The first channel section 66 is adjoined by a rectilinear second channel section 70, which is aligned obliquely to the central axis 62 and inclined to the side brush 52. In the illustrated embodiment, the inclination angle of the second channel portion 70 to the central axis 62 is about 15 °. Based on the direction of travel 34, the second channel section is arranged approximately at the same height as the side brush 52.

The dust guide channel 64 is defined by a first channel side wall 72 facing the side brush 52 and a second channel side wall 74 facing away from the side brush 52, which project downward from a channel ceiling wall 76 in the direction of the bottom surface 18. The two channel side walls 72 and 74 are parallel to each other, the distance between the two channel side walls 72, 74 is in the illustrated embodiment about 7 cm. In the first channel section 66 and also in a subsequent rear region of the second channel section 70, the first channel side wall 72 extends to the bottom surface 18, wherein it has a protrusion of about 5 mm at the rear end portion of the second channel section, so that they during travel the sweeping machine 10 slides along the bottom surface 18 and is arcuately curved. In the remaining region of the second channel section 70, the first channel side wall 72 terminates at a distance from the bottom surface 18, thereby defining a lateral opening 80 of the dust guide channel 64, via which the side brush 52 engages along a portion of its outer periphery with the bristles 56 in the dust guide channel 64. The portion of the outer periphery in which the bristles 56 of the side brush 52 dip into the dust guide channel 64 extends in the illustrated embodiment over an angular range of about 60 °.

The first channel side wall 72 is made of an elastically deformable material, for example a plastic material.

The second channel side wall 74 extends in both the first channel portion 66 and the second channel portion 70 to the bottom surface 18, wherein in the second channel portion 70 has a protrusion of about 5 mm and slides while driving the sweeper 10 on the bottom surface 18. With its edge facing the bottom surface 18, the second channel side wall 74 in the second channel portion 70 is arcuately curved, this is in particular from the FIGS. 3 to 5 clear.

The in the direction of travel 34 forward over the side brush 52 protruding end portion 82 of the dust guide channel 64 is integrally made of an elastically deformable material, d. H. In this end region 82 not only the two channel side walls 72 and 74 are made of an elastically deformable material but also the duct ceiling wall 76. The risk of damaging the dust duct 64 when hitting an obstacle is kept low.

On the front side, the side brush 52 is covered by a front cover 84, which adjoins the first channel side wall 72 at an angle opposite to the direction of rotation 60 and which is held on an elastically deformable holder 86. In the in the FIGS. 1 and 6 illustrated embodiment, the holder 86 comprises a vertically oriented coil spring 88, on the one hand to a rigidly connected to the chassis bracket 89 and on the other hand connected to a front panel 84 connected to the holding plate 90. The front cover 84 is configured in the manner of an apron, which is made of an elastically deformable material and which has a projection to the bottom surface 18 so that it is curved arcuately while driving the sweeper 10 and slides along the bottom surface 18.

An alternative mounting of the front cover 84 is in FIG. 7 shown schematically. In this embodiment, an elastically deformable holder 87 is used with a horizontally oriented coil spring 91 which is fixed to a first spring leg 92 at a rigidly connected to the bracket 89 support arm 93, and with a second spring leg 94, the horizontal coil spring 91 at the Front cover 84 held. Both the in FIG. 6 shown vertically oriented coil spring 88 and the in FIG. 7 shown horizontally oriented coil spring 91 form an elastically deformable support for the front cover 84, so that the risk of damage to the front cover 84 can be kept low when hitting an obstacle.

At a distance from the bottom surface 18 is from the rear side 96 of the front cover 84 from the side brush 52 facing longitudinal rib 98 from which extends along the entire rear side 96 of the front cover 84.

The distance of the front cover 84 to the side brush 52 is selected such that the bristles 56 engage under a portion of the outer periphery of the side brush 52, the longitudinal rib 98, d. H. the free ends of the bristles 56 extend along a portion of the outer periphery of the side brush 52 into an area adjacent the front cover 84 that is covered by the longitudinal rib 98.

The dust guide channel 64 is open at its free, the debris hopper 40 facing away from the end 78, so that while driving the sweeper 10 wind can enter the dust guide channel 64 front side. This assists in the absorption of dust which is supplied from the side brush 52 via the side opening 80 to the dust guide channel 64. Via the dust guide channel 64, the fluidized dust of the Kehrgutaufnahmeeinrichtung 24 can be supplied by the dust enters via the orifice 68 in the sweeping box 30 and then transferred under the action of suction suction caused by the suction 44 and the rotational movement of the sweeping roller 28 in the hopper 40. Dust entrained by the suction air can then be deposited on the filter 48.

The dust guide channel 64 may extend over its entire length along the bottom surface 18 and also the mouth opening 68 of the end wall 32 of the sweeping box 30 may extend to the bottom surface 18. This is in the FIGS. 1 and 8th shown.

Alternatively, it may be provided that the mouth opening 68 occupies a distance to the bottom surface 18 and on the end wall 32 in the region between the mouth opening 68 and the bottom surface 18 a sweeping lip 100 is arranged, which slides along the bottom surface 18 while driving the sweeper 10. This is in FIG. 9 shown. The channel ceiling wall 76 may be inclined in such a configuration in the first channel portion 66 to the horizontal.

Alternatively, it can also be provided that the dust guide channel 64 has an open channel section which extends directly along the bottom surface 18, and additionally a closed channel section with a channel bottom wall 102, which is positioned at a distance from the bottom surface 18. This will be out of the Figures 10 and 11 clear. In particular, at the level of the side brush 52 to the front end 78 of the dust duct 64 at the in the Figures 10 and 11 illustrated embodiments to the bottom surface 18 designed to be open, whereas a rear end portion forms a closed channel portion 104 extending over part of the total length the dust guide channel 64 extends. At the front end of the channel bottom wall 102 may extend to the bottom surface 18 extending sealing lip 106, which preferably has a projection to the bottom surface 18 and while driving the sweeper 10 slides along this. The sealing lip 106 forms the rear end of the open to the bottom surface channel portion of the dust guide channel 64th

In the in the FIGS. 1 to 11 shown first embodiment of the sweeper 10, the sweeping material receiving device 24, the sweeping roller 28. A second embodiment of the sweeper according to the invention is in FIG. 12 represented and generally occupied by the reference numeral 107. This embodiment is largely identical to the above-described first embodiment, for identical components are in FIG. 12 Therefore, the same reference numerals as in the FIGS. 1 to 11 and to avoid repetition, reference is made to the foregoing with respect to these components. Instead of the broom 28 comes in the in FIG. 12 For the sweeping material receiving device 24 shown, a suction mouth 108 is used, to which a suction line 110 connects in the direction of the sweeping goods container 40. By means of the suction mouth 108 debris can be sucked from the bottom surface 18. The arranged on the inside of the side brush 52 dust guide channel 64 opens at the in FIG. 12 illustrated embodiment above the suction mouth 108 in the suction line 110, so that the registered from the side brush 52 in the dust duct 64 dust can be sucked through the suction line 110.

A third embodiment of the sweeper according to the invention is in FIG. 13 represented and in total occupied by the reference numeral 115. It is largely identical to the above with reference to the FIGS. 1 to 11 explained first embodiment. For identical components are therefore in FIG. 13 the same reference numerals as in the FIGS. 1 to 11 and with respect to these components, to avoid repetition referred to above. From the in the FIGS. 1 to 11 illustrated sweeper 10 is different in FIG. 13 illustrated sweeper 115 characterized in that instead of the hopper 40, a hopper 117 is used, which is arranged in the direction of travel 34 of the sweeper 115 in front of the sweeping roller 28. The Kehrgutaufnahmeeinrichtung 24 with the sweeping roller 28 transfers the recorded from the bottom surface 18 dirt and dust particles via a sweeping threshold 119 in the direction 34 forward into the hopper 117. The sweepings container 117 has a bottom wall 121 which connects to the sweeping threshold 119 and the is connected via an end wall 123 with a ceiling wall 125 of the hopper 117. Above the sweeping roller 28 of the sweeper 115 extends a suction 127, which is connected via the suction passage 42 with the suction unit 44 in flow communication. About the suction chamber 127 and the suction channel 42 of the hopper 117 can be acted upon by the suction unit 44 with negative pressure.

The end wall 123 of the hopper 117 has an orifice 129, to which the dust guide channel 64 connects, already in connection with the sweeper 10 with reference to the FIGS. 1 to 11 was explained in detail. In contrast to the first embodiment thus discharges the dust duct 64 at the in FIG. 13 illustrated third embodiment directly into the hopper 117th

By providing the dust guide channel 64, both in the in the FIGS. 1 to 11 illustrated first embodiment as well as in the in the Figures 12 and 13 shown second and third embodiments on the central axis 62 facing the inside of the side brush 52 is arranged, the dust can be kept very low when using the side brush 52. An additional reduction is achieved by the use of the front cover 84, which shoots against the direction of rotation 60 to the lateral opening 80 of the dust guide channel 64 and covers the side brush 52 front. The front cover 84 is shown in FIGS Embodiments at an angle of about 80 ° to the central axis 62 inclined, wherein the dust guide channel 64 facing away from the outer end of the front cover 84 protrudes in the direction of travel 34 via the dust guide channel 64 facing inner end.

Claims (22)

1. Mobile sweeping machine (10, 107, 115) for sweeping a floor surface, having a sweepings receptacle (40, 117) which is able to be applied with underpressure by a suction unit (44) and which is in flow connection with a sweepings uptake device (24), and having a dust separating device (48) which is arranged in the flow path between the sweepings receptacle (40, 117) and the suction unit (44), and having at least one side brush (52) which is rotatable about a rotational axis (54) and which projects laterally over the outer contour of the sweeping machine (10, 107, 115), wherein associated with at least one side brush (52) is a dust guide channel (64) which comprises a first and a second channel side wall (72, 74) as well as a channel ceiling wall (76) and which is in flow connection with the dust separating device (48), and wherein the first channel side wall (72) extends into the region between the rotational axis (54) of the at least one associated side brush (52) and the second channel side wall (74), characterized in that the at least one side brush (52) with which a dust guide channel (64) is associated dips into the associated dust guide channel (64) along a portion of its outer circumference.
2. Mobile sweeping machine in accordance with Claim 1, characterized in that the at least one side brush (52) with which a dust guide channel (64) is associated engages below the first channel side wall (72) of the associated dust guide channel (64), wherein the first channel side wall (72) is arranged between the rotational axis (54) of the side brush (52) and the second channel side wall (74).
3. Mobile sweeping machine in accordance with Claim 1 or 2, characterized in that the second channel side wall (74) at the level of the associated side brush (52) extends up to the floor surface (18).
4. Mobile sweeping machine in accordance with any one of the preceding Claims, characterized in that the second channel side wall (74) in its rim region facing the floor surface (18) is inclined inwardly into the dust guide channel (64).
5. Mobile sweeping machine in accordance with any one of the preceding Claims, characterized in that the second channel side wall (74) at least at the level of the associated side brush (52) is made from an elastically deformable material.
6. Mobile sweeping machine in accordance with any one of the preceding Claims, characterized in that the first channel side wall (72) at least at the level of the associated side brush (52) is made from an elastically deformable material.
7. Mobile sweeping machine in accordance with any one of the preceding Claims, characterized in that the dust guide channel (64) at least at the level of the associated side brush (52) is aligned obliquely to the longitudinally aligned central axis (62) of the sweeping machine (10).
8. Mobile sweeping machine in accordance with any one of the preceding Claims, characterized in that the dust guide channel (64) at least at the level of the associated side brush (52) is inclined in the direction to the side brush.
9. Mobile sweeping machine in accordance with Claim 7 or 8, characterized in that the dust guide channel (64) at the level of the associated side brush (52) is inclined at an angle of 5° to 30° to the longitudinally aligned central axis (62) of the sweeping machine (10, 107, 115).
10. Mobile sweeping machine in accordance with any one of the preceding Claims, characterized in that the dust guide channel (64) is open at its front end remote from the sweepings uptake device (24).
11. Mobile sweeping machine in accordance with any one of the preceding Claims, characterized in that the dust guide channel (64) projects forwardly over the associated side brush (52) with respect to the direction of travel (34) of the sweeping machine (10, 107, 115).
12. Mobile sweeping machine in accordance with Claim 11, characterized in that the dust guide channel (64) in its region projecting over the associated side brush (52) is made from an elastically deformable material.
13. Mobile sweeping machine in accordance with any one of the preceding Claims, characterized in that the sweepings uptake device (24) has a sweeping roller (28) which is rotatable about a horizontal rotational axis (26) and which is surrounded by a sweeper well (30), wherein at least one dust guide channel (64) opens into the sweeper well (30).
14. Mobile sweeping machine in accordance with any one of the preceding Claims, characterized in that at least one dust guide channel (64) opens into the sweepings receptacle (117).
15. Mobile sweeping machine in accordance with any one of the preceding Claims, characterized in that the sweepings uptake device comprises a suction orifice (108) for drawing up sweepings from the floor surface (18), wherein the suction orifice (108) is connected to the sweepings receptacle (40) by way of a suction line (110) and at least one dust guide channel (64) opens into the suction line (110).
16. Mobile sweeping machine in accordance with any one of the preceding Claims, characterized in that a front covering (84) is arranged, in travel direction (34) of the sweeping machine (10, 107, 115), in front of at least one side brush (52) with which a dust guide channel (64) is associated.
17. Mobile sweeping machine in accordance with Claim 16, characterized in that the front covering (84) is inclined at an angle of 55° to 90° to the longitudinally aligned central axis (62) of the sweeping machine (10, 107, 115).
18. Mobile sweeping machine in accordance with Claim 16 or 17, characterized in that the front covering (84) extends up to the floor surface (18).
19. Mobile sweeping machine in accordance with any one of Claims 16 to 18, characterized in that the front covering (84) in its rim region facing the floor surface (18) is inclined in the direction to the side brush (52).
20. Mobile sweeping machine in accordance with any one of Claims 16 to 19, characterized in that the front covering (84) is made from an elastically deformable material.
21. Mobile sweeping machine in accordance with any one of Claims 16 to 20, characterized in that the front covering (84) is held on an elastically deformable holder (86).
22. Mobile sweeping machine in accordance with any one of Claims 16 to 21, characterized in that a rib (98) which has a distance to the floor surface (18) projects from the rear side (96) of the front covering (84) facing the side brush (52).

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