DE102022127925A1 - Sweeper with height adjustment device - Google Patents

Abstract

Sweeper, comprising a chassis (12), a rear wheel device (20) and a front wheel device (22), which are arranged on the chassis (12) and which define a setup plane (26) of the sweeper on a surface to be cleaned (24), a push bar (42) which is arranged on the chassis (12), a sweepings container (108) which sits on the chassis (12), at least one main sweeping roller (54) which is arranged on the chassis (12) so as to be rotatable about a rotation axis (56), a height adjustment device (72) via which a height position of the rotation axis (56) of the at least one main sweeping roller (54) relative to the setup plane (26) can be adjusted, and a handle (84) which can be pivoted to the chassis (12), which is mechanically coupled to the height adjustment device (72), and via which a height position of the rotation axis (56) relative to the setup plane (26) can be adjusted by an operator. is lockably adjustable, characterized in that the handle (84) has an end position (98) in which the at least one main sweeping roller (54) is spaced from the installation plane (26).

Description

The invention relates to a sweeper comprising a chassis, a rear wheel device and a front wheel device which are arranged on the chassis and which define a setup plane of the sweeper on a surface to be cleaned, a push bar which is arranged on the chassis, a sweeping waste container which sits on the chassis, at least one main sweeping roller which is arranged on the chassis so as to be rotatable about an axis of rotation, a height adjustment device via which a height position of the axis of rotation of the at least one main sweeping roller can be adjusted to the setup plane, and a handle which can be pivoted to the chassis, which is mechanically coupled to the height adjustment device, and via which a height position of the axis of rotation to the setup plane can be set in a lockable manner by an operator.

From the EP 1 531 202 B1 A sweeper with a housing, a waste container and a sweeping roller covered by the housing, which is mounted on a height adjustment device so that it can rotate about a rotation axis, is known. The height adjustment device can be pivoted about a pivot axis aligned parallel to the rotation axis by means of an adjustment mechanism, wherein the adjustment mechanism has a pivot arm which can pivot about the pivot axis, which protrudes from the housing and can be releasably locked in different pivot positions, and wherein the height adjustment device comprises two support arms which can pivot about the pivot axis and on which the sweeping roller is rotatably mounted. The support arms are rigidly connected to one another via a cross strut, wherein the pivot arm is fixed to the cross strut and protrudes from the cross strut in a radial direction with respect to the pivot axis.

The EN 10 2018 104 749 A1 discloses a sweeper comprising a chassis, at least one broom which is arranged on the chassis, and a height adjustment device which is associated with the at least one broom and via which a height position of the at least one broom relative to the chassis can be adjusted.

The EN 10 2018 104 744 A1 discloses a sweeper comprising a chassis, a rear wheel device which is arranged on the chassis, and a push bar which is pivotably arranged on the chassis. A foot tread area is provided which is arranged on the chassis in the area of the rear wheel device, wherein starting from a sweeper correctly positioned on a base, the sweeper as a whole can be positioned away from the base into a parking position by an operator by stepping on the foot bar when supported by the rear wheel device on the base.

The invention is based on the object of providing a sweeper of the type mentioned above, which is easy to operate and has long operating times.

This object is achieved according to the invention in the sweeper mentioned at the outset in that the handle has an end position in which the at least one main sweeping roller is spaced from the installation plane.

Basically, at least one main sweeping roller experiences a mechanical load when it acts on a surface to be cleaned. Bristles of the main sweeping roller are bent.

If there is a permanent mechanical load even outside of sweeping operations, this can lead to a shortened service life of the corresponding main sweeping roller.

In the solution according to the invention, there is an end position of the handle in which the at least one main sweeping roller is lifted off the installation plane so that there is no contact and thus no mechanical stress.

In addition, such an end position with a raised installation level can also be advantageous for pure driving operation of the sweeper without cleaning function, for example to be able to drive over an area that is not to be cleaned or to park or store the sweeper.

By means of the corresponding end position of the handle, in which the at least one main sweeping roller is raised above the installation level, the sweeping machine can also be stored upright on a floor above its installation level while protecting the at least one main sweeping roller.

Because at least one main sweeping roller is lifted from the installation level when the handle is in an end position, this corresponding position can be reached by an operator in a simple and intuitive manner.

• - eine Schwenkbewegung des Handgriffs aus der Endstellung heraus verringert einen Höhenabstand der Rotationsachse zu der Aufstellebene;
• - eine Schwenkbewegung des Handgriffs aus der Endstellung heraus vergrößert einen Anpressdruck der mindestens einen Hauptkehrwalze an die zu reinigende Fläche;
• - es gibt genau eine Endstellung, in welcher die mindestens eine Hauptkehrwalze beabstandet zu der Aufstellebene ist;
• - in jeder Festlegungsstellung des Handgriffs außerhalb der Endstellung berührt die mindestens eine Hauptkehrwalze die Aufstellebene;
• - eine Schwenkbewegung des Handgriffs aus der Endstellung heraus, in welcher die mindestens eine Hauptkehrwalze beabstandet zu der Aufstellebene ist, ist von der Aufstellebene weg.

It is advantageous if at least one of the following is provided:

• - a pivoting movement of the handle from the end position reduces the height distance between the rotation axis and the installation plane;
• - a pivoting movement of the handle from the end position increases the contact pressure of at least one main sweeping roller on the surface to be cleaned;
• - there is exactly one end position in which the at least one main sweeping roller is spaced from the installation plane;
• - in any fixing position of the handle outside the end position, at least one main sweeping roller touches the installation plane;
• - a pivoting movement of the handle from the end position in which the at least one main sweeping roller is spaced from the installation plane, is away from the installation plane.

This results in a structurally simple design with optimized usability.

• - eine Schwenkachse für die Schwenkbeweglichkeit des Handgriffs zu dem Fahrgestell ist parallel zu der Rotationsachse der mindestens einen Hauptkehrwalze;
• - eine Schwenkachse für die Schwenkbeweglichkeit des Handgriffs zu dem Fahrgestell ist parallel zu einer Radachse der Hinterradeinrichtung;
• - eine Schwenkachse der Schwenkbeweglichkeit des Handgriffs zu dem Fahrgestell ist quer und insbesondere senkrecht zu einer Vorwärtsfahrtrichtung der Kehrmaschine;
• - eine Schwenkachse der Schwenkbeweglichkeit des Handgriffs zu dem Fahrgestell ist parallel zu einer Schwenkachse des Schubbügels, wobei der Schubbügel schwenkbar zu dem Fahrgestell ist.

It is also advantageous if at least one of the following is provided:

• - a pivot axis for the pivoting mobility of the handle to the chassis is parallel to the axis of rotation of the at least one main sweeping roller;
• - a pivot axis for the pivoting mobility of the handle to the chassis is parallel to a wheel axis of the rear wheel device;
• - a pivot axis of the pivoting mobility of the handle to the chassis is transverse and in particular perpendicular to a forward travel direction of the sweeper;
• - a pivot axis of the pivoting mobility of the handle to the chassis is parallel to a pivot axis of the push bar, wherein the push bar is pivotable to the chassis.

This results in easy operation of the height adjustment of at least one main sweeping roller to the installation level.

In one embodiment, at least one stop is provided against which the handle and/or an element of the height adjustment device rests in the end position in which the at least one main sweeping roller is spaced from the installation plane. This makes it particularly easy to block further pivoting of the handle beyond this end position.

In one embodiment, the handle is assigned a track device, which in particular comprises a circular path when the handle can be pivoted relative to the chassis. Continuous or preferably discrete positions of the handle, which correspond to pivot positions, can be defined on the track device. This also defines the height positions of the at least one main sweeping roller relative to the installation plane.

In a structural embodiment, the height adjustment device comprises a swing device which is mounted on the chassis so as to be rotatable about a rotation axis, wherein the at least one main sweeping roller is held on the swing device so as to be rotatable about the rotation axis. In this context, reference is made to the EP 1 531 202 B1 to which express reference is made. A height adjustment device can be implemented in a structurally simple manner. Furthermore, the handle can be mechanically coupled to the height adjustment device in a simple manner. In particular, a height position can then be set and fixed directly using the handle.

• - die Drehachse der Schwingeneinrichtung ist beabstandet zu der Rotationsachse der mindestens einen Hauptkehrwalze;
• - die Drehachse der Schwingeneinrichtung und die Rotationsachse der mindestens einen Hauptkehrwalze sind parallel zueinander orientiert.

It is beneficial if at least one of the following is provided:

• - the axis of rotation of the swing device is spaced from the axis of rotation of the at least one main sweeping roller;
• - the axis of rotation of the swing device and the axis of rotation of at least one main sweeping roller are oriented parallel to each other.

The height position can be easily adjusted by turning the swing arm.

• - der Handgriff ist starr mit der Schwingeneinrichtung verbunden;
• - der Handgriff ist bezogen auf die Drehachse der Schwingeneinrichtung exzentrisch mit der Schwingeneinrichtung verbunden.

Furthermore, it is advantageous if the handle is connected to the swing device, in particular to at least one of the following:

• - the handle is rigidly connected to the swing arm;
• - the handle is connected to the swing arm device eccentrically with respect to the axis of rotation of the swing arm device.

The handle can then be pivoted to the chassis in a simple manner by rotating the swing mechanism to the chassis. A pivoting position of the handle to the chassis then corresponds directly to a specific height position of the at least one main sweeping roller (with its axis of rotation) to the installation level. This results in a structurally simple design for height adjustment.

In one embodiment, the swing device comprises a first region, a second region and a third region, wherein the second area is located between the first area and the third area and the swing device is held on the chassis in the second area so that it can rotate about the axis of rotation, wherein the at least one main sweeping roller is held in the first area and wherein the handle is connected to the swing device in the third area. This results in a height adjustment device with a simple design, in which a height position of the at least one main sweeping roller in relation to the installation level can be set and also fixed directly via a pivoting position of the handle.

In one embodiment, the handle is assigned a plurality of discrete positions, wherein in particular this plurality of discrete positions are arranged on a track device and at which the handle can be fixed with respect to its pivoting movement, wherein a discrete position is assigned to a specific height position of the rotation axis in relation to the installation plane. This results in simple and intuitive operation.

In a structurally favorable embodiment, the handle comprises a form-fitting element which serves to determine a pivoting position of the handle in relation to the chassis and in particular to determine a height position of the rotation axis of the at least one main sweeping roller in relation to the installation plane. In this way, a corresponding height position of the at least one main sweeping roller in relation to the installation plane can be set and also determined in a simple manner via the handle.

It can be provided that the form-fitting element is mounted on a rod in a movable and in particular linearly displaceable manner, with the handle being mechanically connected to the height adjustment device via the rod. This results in a structurally simple design of the height adjustment, including the determination of a selected height position.

• - das Formschlusselement ist als Hülse ausgebildet, welche insbesondere auf einer Stange sitzt;
• - an einer Bahneinrichtung, an welcher der Handgriff beweglich ist, sind ein oder mehrere Gegenelemente für das Formschlusselement für eine Formschlussverbindung angeordnet, wobei bei einer Formschlussverbindung eine Schwenkbeweglichkeit des Handgriffs zu dem Fahrgestell gesperrt ist;
• - das Formschlusselement ist durch eine Federeinrichtung federbeaufschlagt, wobei zur Aufhebung einer Formschlussverbindung ein Bediener über Bewegung des Formschlusselements eine Federkraft der Federeinrichtung überwinden muss.

It is advantageous if at least one of the following is provided:

• - the form-locking element is designed as a sleeve which sits in particular on a rod;
• - on a track device on which the handle is movable, one or more counter elements for the form-locking element for a form-locking connection are arranged, wherein in the case of a form-locking connection, a pivoting mobility of the handle relative to the chassis is blocked;
• - the form-locking element is spring-loaded by a spring device, whereby in order to release a form-locking connection an operator must overcome a spring force of the spring device by moving the form-locking element.

Due to the design of the form-locking element as a sleeve, it can be easily moved by an operator, in particular to release a form-locking connection and to pivot the handle (and thus to adjust the height of at least one main sweeping roller).

The track device makes it easy to set and define the height positions of at least one main sweeping roller. This can be done in an intuitive manner for an operator.

In a normal state, when the form-locking element is active and no operator force is applied, the spring device determines a certain height position. To adjust it, an operator must overcome the spring force of the spring device and, in particular, move the form-locking element. This largely prevents, for example, unintentional adjustment.

In one embodiment, the chassis has a first area on which the height adjustment device, the at least one main sweeping roller and the handle are arranged, and has a second area on which the sweeping waste container is held, wherein the second area follows the first area in a longitudinal direction of the chassis. This results in a structurally favorable structure for the sweeping machine. In particular, a division into a sweeping waste container area (second area) and a first area can be obtained on which functional components of the sweeping machine are arranged.

It is advantageous if at least one main sweeping roller is positioned between the rear wheels of the rear wheel device on the chassis. During a sweeping process, the debris that is driven over can then be guided into the debris container via the at least one main sweeping roller.

In an advantageous embodiment, a storage device with a storage surface for one or more objects is provided, wherein the storage device is held by the chassis and is inclined parallel to the installation plane or at most at an angle of 10° to the installation plane. Objects such as a bucket can then be placed on the storage device during cleaning or driving operations (with the vehicle lifted at least at least one sweeping roller) with the sweeper. Objects can be stored on the sweeper when it is parked.

In one embodiment, a suction fan device is provided, by means of which an interior of the waste container can be subjected to a negative pressure flow, and a filter device for a negative pressure flow is provided. Basically, during a sweeping process, dust is thrown up by the action of at least one sweeping roller on a floor to be cleaned. This can pollute the environment. A relevant proportion of this dust can be sucked away by the suction fan device, thereby reducing the environmental pollution.

The sweeper is designed in particular as a hand-held sweeper, which can be guided over the floor to be cleaned using the push bar. In one embodiment, no separate motor is provided for the at least one main sweeping roller. When an operator guides the sweeper over an area to be cleaned and the at least one main sweeping roller acts on the area to be cleaned, this causes the at least one main sweeping roller to rotate around the axis of rotation. Alternatively, it can also be provided that a separate motor for the at least one main sweeping roller rotates it around the axis of rotation.

• 1 eine perspektivische Darstellung eines ersten Ausführungsbeispiels einer erfindungsgemäßen Kehrmaschine;
• 2 eine Hinteransicht der Kehrmaschine gemäß 1 mit angehobener Hauptkehrwalze;
• 3 eine Schnittansicht der Kehrmaschine gemäß 2 längs der Linie 3-3 gemäß 2;
• 4 die gleiche Ansicht wie 2 mit herabgelassener Hauptkehrwalze;
• 5 eine Schnittansicht längs der Linie 5-5 der Kehrmaschine gemäß 4;
• 6 eine perspektivische Darstellung eines zweiten Ausführungsbeispiels einer erfindungsgemäßen Kehrmaschine;
• 7 eine Schnittansicht der Kehrmaschine gemäß 6; und
• 8 eine vergrößerte Darstellung des Berichts A gemäß 7.

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

• 1 a perspective view of a first embodiment of a sweeper according to the invention;
• 2 a rear view of the sweeper according to 1 with raised main sweeper roller;
• 3 a sectional view of the sweeper according to 2 along line 3-3 according to 2 ;
• 4 the same view as 2 with main sweeper roller lowered;
• 5 a sectional view along the line 5-5 of the sweeper according to 4 ;
• 6 a perspective view of a second embodiment of a sweeper according to the invention;
• 7 a sectional view of the sweeper according to 6 ; and
• 8th an enlarged version of Report A according to 7 .

A first embodiment of a sweeper according to the invention, which is shown in the 1 to 5 shown and designated 10, comprises a chassis 12. The chassis 12 forms the body or base of the sweeper 10 and holds (directly or indirectly) the components of the sweeper 10. The chassis 12 ensures the mechanical stability of the sweeper 10 and holds its components.

The chassis 12 has a front end 14 and a rear end 16. A longitudinal axis 18 of the chassis 12 (and thus also of the sweeper 10) runs between the front end 14 and the rear end 16.

The sweeper 10 is movable via a rear wheel device 20 and a front wheel device 22 on a surface 24 to be cleaned (cf. 3 ). The rear wheel device 20 and the front wheel device 22 define a mounting plane 26 of the sweeper 10 on the surface 24 to be cleaned. If the surface 24 to be cleaned is flat, then the mounting plane 26 coincides with the surface to be cleaned.

The rear wheel device 20 is arranged on the chassis 12 in the area of the rear end 16. The rear wheel device 20 has a right rear wheel 30 and a left rear wheel 32 in relation to a forward travel direction 28 of the sweeper 10. The right rear wheel 30 and the left rear wheel 32 are spaced apart from one another in a transverse direction 34. The transverse direction 34 is perpendicular to the longitudinal axis 18 and parallel to the installation plane 26.

The right rear wheel 30 and the left rear wheel 32 are positioned on the chassis 12 so that they can rotate about a common wheel axis 36. The wheel axis 36 is parallel to the transverse direction 34. It is perpendicular to the longitudinal axis 18. It is perpendicular to the forward direction 28. The wheel axis 36 is parallel to the installation plane 26.

The right rear wheel 30 and the left rear wheel 32 are each arranged on the side of the chassis 12. In one embodiment, they extend to the rear end 16 (cf. 1 ).

In one embodiment, the front wheel device 22 is or comprises a roller 38 and in particular a steering roller. The front wheel device 22 with the (at least one) roller 38 is arranged in the region of the front end 14.

In one embodiment, the roller 38 lies on a center plane 40 of the chassis 12 (cf. 2 ). The central plane 40 is perpendicular to the installation plane 26. The transverse direction 34 is perpendicular to the center plane 40. The longitudinal axis 18 lies in the center plane 40. The center plane 40 is a plane which is centrally located between the right rear wheel 30 and the left rear wheel 32.

The roller 38 is rotatable about a roller axis. In the forward travel direction 28 of the sweeper 10, this roller axis is parallel to the wheel axis 36. The wheel axis 36 is a fixed axis in relation to the chassis 12. The position of the roller axis in relation to the chassis 12 depends on the position of the roller 38 if it is designed as a steering roller.

The roller axis of the roller 38 is parallel to the installation plane 26.

The sweeper 10 comprises a push bar 42, which is arranged on the chassis in the area of the rear end 16 and in particular in the area of the rear wheel device 20. An operator standing on the floor 24 to be cleaned can use the push bar 42 to guide and in particular push the sweeper 10 over the floor to be cleaned.

In one embodiment, no motor drive is provided for the sweeper 10 and the travel movement is operator-driven (via operator force).

In one embodiment, the push bar 42 can be pivoted about a pivot axis 44 to the chassis 12. A defined pivot position of the push bar 42 to the chassis 12 can be set continuously or in stages. This means that the push bar 42 can be pivoted for storing the sweeper 10 in such a way that the height of the sweeper 10 is minimized in a height direction 46 perpendicular to the installation plane 26 and, for example, does not protrude beyond the top of the sweeper 10.

Due to the pivotability of the push bar 42 about the pivot axis 44, the size of the sweeper 10 can be adjusted to suit an operator during sweeping operation.

The pivot axis 44 is parallel to the installation plane 26. It is perpendicular to the center plane 40. It is perpendicular to the longitudinal axis 18 of the chassis 12.

In one embodiment, a corresponding pivot bearing for the pivotable connection of the push bar 42 to the chassis 12 is arranged such that the pivot axis 44 lies in the height direction 46 above the wheel axis 36 of the rear wheel device 20.

In one embodiment, the push bar comprises a first rod portion 48 which is pivotally connected to the chassis 12 in the region of the left rear wheel 32 and a spaced second rod portion 50 which is pivotally connected to the chassis 12 in the region of the right rear wheel 30.

The first rod portion 48 and the second rod portion 50 are connected to the chassis 12 via a distal end portion. A third rod portion 52 is provided which connects the first rod portion 48 and the second rod portion 50 to one another in a proximal end portion. The third rod portion 52 is a primary holding portion for an operator who guides the sweeper 10 over the surface 24 to be cleaned.

A main sweeping roller 54 is arranged on the chassis 12 and is rotatable about a rotation axis 56. The main sweeping roller 54 comprises a cylindrical carrier 58 on which a plurality of bristles are arranged.

The rotation axis 56 is parallel to the installation plane 26. It is parallel to the wheel axis 36 or parallel to the pivot axis 44. It is perpendicular to the center plane 40. It is parallel to the transverse direction 34. The rotation axis 56 is perpendicular to the longitudinal axis 18. It is perpendicular to the forward direction 28.

During sweeping operation of the sweeper 10, the bristles of the main sweeping roller 54 act on the surface 24 to be cleaned (cf. 5 ; in 5 a position of the main sweeping roller 54 is shown in which it touches the surface 24 to be cleaned with its bristles and thereby acts mechanically on it. This leads to a corresponding deformation of the bristles, which in 5 is not shown for presentational reasons.)

The main sweeping roller 54 is arranged between the left rear wheel 32 and the right rear wheel 30 in the region of the rear end 16 of the chassis 12.

A swing device 60 is positioned on the chassis 12 via a pivot bearing 62. The pivot bearing 62 defines a rotation axis 64.

The axis of rotation 64 is parallel to the installation plane 26. It is parallel to the rotation axis 56. It is perpendicular to the center plane 40. It is parallel to the wheel axis 36. It is parallel to the transverse direction 34. It is perpendicular to the longitudinal axis 18.

The swing device 60 has a first region 66, a second region 68, and a third region 70. The second region 68 lies between the first region 66 and the third region 70. The swing device 60 with the pivot bearing 62 is held on the chassis 12 via the second region 68.

In the first region, the main sweeping roller 54 is held on the swing device 60 so as to be rotatable about the rotation axis 56 via a corresponding roller pivot bearing.

Depending on the rotational position of the swing device 60 about the rotation axis 64, the rotation axis 56 of the main sweeping roller 54 is at different height positions (in the height direction 46) to the installation plane 26. This is explained in more detail below.

A height adjustment device 72 is formed via the swing device 60, with which the height position of the main sweeping roller 54 of the installation level 26 can be adjusted depending on the rotational position of the swing device 60 about the rotation axis 64.

It can be provided that the swing device 60 is assigned a guide device in order to guide it with respect to the chassis 12 and thus the main sweeping roller 54.

In one embodiment, the swing mechanism comprises spaced apart swing elements which are connected to one another and are connected to one another, for example, at the third region 70. Between the spaced apart swing elements, the main sweeping roller 54 is positioned at the first region 66 on the corresponding pivot bearing for rotation about the rotation axis 56.

The chassis 12 comprises a first region 74, at which the rear end 16 is located, and a second region 76, which follows the first region 74 in the longitudinal axis 18 and at which the front end 14 is located.

A housing 78 is arranged on the first region 74, which has a housing interior 80 (cf. 3 ). The height adjustment device 72 is arranged in the housing interior 80.

The housing 78 has a wall 82 as a boundary to the second region 76.

In particular, a pivot bearing for the main sweeping roller 54 is also arranged in the housing interior 80 for its rotatable mounting about the rotation axis 56. Furthermore, the swing device 60 with the pivot bearing 62 is arranged in the housing interior 80.

A handle 84 is provided for an operator to adjust the height of the main sweeping roller 54 in relation to the installation plane 26. The handle 84 comprises a rod 86. This rod 86 is rigidly connected to the third region 70 of the swing device 60; the handle 84 is mechanically coupled to the swing device 60 via the rod 86.

The handle 84 can thus be rotated or pivoted relative to the chassis 12 via the rotation axis 64.

A track device 88 is located on the housing 78. The track device 88 serves to determine a specific rotational position or swivel position of the handle 84 in relation to the chassis 12. It also indicates to an operator which rotational position the handle 84 is in in relation to the chassis 12. The specific rotational position in turn corresponds to a height position of the main sweeping roller 54 (relative to the rotation axis 56) above the installation level 26.

The track device 88 comprises a circular track 90 with opposing circular track elements, between which there is a slot. The rod 86 is inserted through the slot.

A form-locking element 92 is located on the rod 86 outside the housing interior 80. This form-locking element 92 serves to determine a pivoting position (rotational position) of the handle 84 on the circular path 90 and thereby also to determine a specific rotational position of the swing device 60 in relation to the chassis 12.

Counter elements 94 and in particular spaced-apart discrete elements 94 are arranged on the circular path 90. These correspond to the form-locking element 92 in such a way that in certain discrete positions the form-locking element 92 can be latched onto the counter element 94, thereby preventing the handle 84 from pivoting relative to the chassis 12. This in turn prevents the swinging device 60 from rotating about the axis of rotation 64. This in turn means that a certain height position of the main sweeping roller 54 (relative to its axis of rotation 56) relative to the installation plane 26 is fixed.

The form-locking element 92 is guided on the rod 86 in a movable and, in particular, linearly displaceable manner.

In one embodiment, the form-locking element 92 is designed as a sleeve which is guided linearly displaceably on the rod.

The form-locking element 92 is connected via a spring device 96 (cf. 5 ) is supported on the rod 86. A spring force of the spring device 96 acts in such a way that it presses the form-locking element 92 against the housing 78 and thereby against the track device 88. When a certain position of the form-locking element 92 in relation to the counter elements 94 is reached, a form-locking takes place and the pivotability of the handle 84 (in any direction) is blocked.

An operator can remove the positive locking between the positive locking element 92 and the counter elements 94 by pulling the positive locking element 92 away from the rod 86 (away from the rotation axis 64). To do this, he must overcome the spring force of the spring device 96. After removing the positive locking between the positive locking element 92 and the counter elements 94, he can then pivot the handle 84 relative to the chassis 12 and then adjust the height position of the main sweeping roller 54 to the installation plane 26.

If he then no longer exerts any force, the positive locking element 92 can move again in the direction of the track device 88 and a positive locking can be ensured. As mentioned above, in particular discrete positive locking positions of the handle 84 on the track device 88 are provided.

In this context, reference is made to the EP 1 531 202 B1 , in which a corresponding elastically prestressed handle is disclosed.

The handle 84 is between a first end position 98 ( 1 , 3 , 4 ) and a second end position (not shown in the figures) about the axis of rotation 64 pivotable to the chassis 12. The first end position 98 is a position of the handle 84 in which the swing device 60 is positioned such that the main sweeping roller 54 has the greatest distance to the installation plane 26 with respect to its axis of rotation 56 in relation to all other positions.

The second end position is a position of the handle 84 in which the swing device 60 with the main sweeping roller 54 is positioned such that the rotation axis 56 has the smallest distance to the installation plane 26.

When the handle 84 pivots out of the first end position 98, the distance between the rotation axis 56 and the installation plane 26 decreases.

In one embodiment ( 3 to 6 ), the handle 84 is oriented at an acute angle to the installation plane 26 with respect to the rod 86. When pivoting out of the first end position 98, the angle between the handle 84 and the installation plane 26 increases (which leads to a lowering of the rotation axis 56).

In the first end position 98 and the second end position, the handle 84 can be fixed and in particular locked relative to the chassis 12, in particular via the track device 88 by engagement of the counter elements 94 on the form-fitting element 92.

It can additionally be provided that the first end position 98 and/or the second end position is defined by a stop 100. When the handle 84 reaches the first end position 98, the handle 84 and/or an element of the height adjustment device 72 rests against the stop 100.

In one embodiment, the stop 100 is formed on the track device 88 and forms, for example, a boundary wall of the slot of the track device 88, which (in the described embodiment) specifies the minimum pivot angle and blocks further pivoting toward the installation plane 26.

In a similar way, a stop can also be assigned to the second end position.

The first end position 98 is such that in this first end position 98 of the handle 84 the main sweeping roller 54 is spaced from the installation plane 26. Bristles 102 of the main sweeping roller 54 are spaced from the installation plane 26 and do not touch it.

In the first end position 98, the main sweeping roller 54 is raised relative to the installation level 26.

In the first end position 98 of the handle 84 with the main sweeping roller 54 raised, the sweeping machine 10 can be guided over a floor surface without the main sweeping roller 54 coming into mechanical contact with the floor surface. The first end position 98 of the handle 84 provides a driving mode to a certain extent.

Furthermore, in the first end position 98 of the handle 84, the main sweeping roller 54 can be "relieved". Its bristles 102 do not touch the ground on which the sweeping machine 10 is positioned. As a result, they do not experience any deformation. They are thus relieved of load when not in use and their service life can thus be extended.

In the 1 to 3 such a driving state or storage state of the sweeper 10 is shown, in which the handle 84 is in its first end position 98 and thus the main sweeping roller 54 is spaced from the installation plane 26. There is a distance between the tips of the bristles 102 and the installation plane 26. In 3 a corresponding minimum distance is indicated by the reference numeral 104.

Outside the first end position 98, the main sweeping roller 54 is lowered and touches the installation plane 26 in such a way that a surface 24 to be cleaned is touched ( 4 , 5 ).

This means that bristles 102 are bent due to contact with the floor 24 to be cleaned. This is in the 4 and 5 not shown for illustrative reasons. The bristles 102 lie in a partial area against the surface 24 to be cleaned in order to be able to act on it mechanically.

The further the handle 84 is pivoted out of the first end position 98 (with corresponding locking via the form-locking element 92 and the counter elements 94), the lower the rotation axis 56 is in the height direction 46 to the installation plane 26.

By adjusting the respective pivot position accordingly, an adjustment to the nature of the surface 24 to be cleaned can be made and, for example, a contact pressure on the surface 24 to be cleaned can also be set. Furthermore, bristle wear can be compensated by selecting the appropriate pivot position.

The chassis 12 comprises a base support 106. The front wheel device 22 is seated directly on the base support 106. The base support 106 has a plate-shaped design at least in the second region 76 of the chassis 12.

A sweepings container 108 is detachably held on the base support 106 on the second region 76 of the chassis 12. The sweepings container 108 serves to receive sweepings, which are conveyed by the main sweeping roller 54 into an interior space 110 of the sweepings container 108.

The sweepings container 108 is designed as a box. It comprises a wall 112 which surrounds the interior 110. The wall 112 is open on a front side 114 which faces the housing 78 when the sweepings container 108 is seated on the chassis 12. Sweepings can be conveyed into the interior 110 via a corresponding opening 116 of the sweepings container 108 during sweeping operation of the sweeping machine 10. When the sweepings container 108 is removed from the sweeping machine 10, the sweepings container 108 can be emptied via the opening 116.

The wall 112 of the waste container 108 comprises a bottom wall 118. When the waste container 108 is seated on the chassis 12, the bottom wall 118 faces the base support 106 and is supported in particular on the latter.

Opposite the bottom wall 118, the waste container 108 has a ceiling wall 120.

The top wall 120 and the bottom wall 118 are connected by a side wall 122. This side wall has a front area 124 which is arranged at the front end 14 or faces it. The opening 116 on the waste container 108 is positioned opposite this front area 124.

In one embodiment, the bottom wall 118 and the top wall 120 are essentially straight. The front area 124 includes steps (see 3 ). These serve for the positive positioning of the waste container 108 on the chassis 12 and also for providing recesses for mounting elements of the front wheel device 22.

The wall 82 of the housing 78 is essentially straight. It is inclined at an acute angle to the installation plane 26. In the embodiment shown, this acute angle is approximately 70°. The wall 112 is adapted to this inclination of the wall 82 of the housing 78 at the opening 116. As a result, the waste container 108, when it is seated on the chassis 12, can also be supported on the wall 82 downwards towards the installation plane 26.

A holding device, designated as a whole by 126, is arranged on the chassis 12 and holds the waste container 108 on the chassis 12. This holding device 126 comprises the wall 82 and further form-fitting elements, which ensure appropriate support of the waste container 108. In particular, lateral form-fitting elements 128 (cf. 1 ) and front form-locking elements 130 (cf. 3 ) are provided which prevent the dirt container 108 from moving outwards in the transverse direction 34 (lateral form-locking elements 128) and in the longitudinal axis 18 towards the front end 14 (front form-locking element 130) when it is properly positioned on the chassis 12. The wall 82 of the housing 78 ensures that the outward movement towards the rear end 16 is blocked.

Furthermore, the chassis 12 with the second region 68 provides support downwards. As mentioned, the wall 82 also provides support downwards towards the installation plane 26. The front form-fitting element 130 can also be designed in such a way that support downwards is provided.

The waste container 108 is positioned on the chassis 12 in such a way that it can be removed upwards in a direction opposite to the direction of the installation plane 26 and, in particular, can be removed without tools. No screws or the like need to be loosened in order to remove the waste container.

The housing 78 has an opening 132 on the wall 82, which is assigned to the main sweeping roller 54. Sweepings can be conveyed through the opening 132 by means of the main sweeping roller 54 through the opening 116 into the sweepings container 108.

On the first area 74 of the chassis 12, in the area of the opening 132, there is a ramp 134 which leads from the installation level 26 to the opening 132.

Without force loading, the ramp 134 is oriented at an acute angle to the installation plane 26, in such a way that an inclined plane to the opening 132 is formed for sweepings.

Sweepings are thrown into the opening 132 by the main sweeping roller 54. The ramp supports this throwing. At the same time, it forms an apron or boundary surface, which essentially prevents sweepings from being thrown by the main sweeping roller 54 below the base support 106 in the direction of the roller 38.

In one embodiment, the ramp 134 is movable. It can be movably mounted on the chassis 12 and/or have its own mobility through a corresponding design made of an elastic material such as a rubber material.

In one embodiment, one or two side brushes 136 are arranged on the chassis 12. In the embodiment shown, one side brush 136 is arranged on each side.

A side brush is held by an arm 138, in particular lockably pivotable to the chassis 12.

A broom holder 140 is attached to the arm 138. A round brush 142 with corresponding bristles is attached to the broom holder 140.

In particular, the round brush is inclined at a small acute angle (for example in the order of 30°) to the installation plane 26.

A lateral position of the corresponding side broom 136 can be determined via the pivotable side arm 138. The arm 138 can be pivoted in particular towards the chassis 12 in order to provide a space-optimized storage position for the sweeper 12.

A free space 144 is formed between the installation level 26 and the base support 106. It is the task of the side brushes 136 to transport sweepings in such a way that they can be driven over the free space 144 and then can be thrown through the opening 132 into the sweepings container 108 by means of the main sweeping roller 54.

In one embodiment, a handle 146 is arranged on the chassis 12 in the region of the front end 14, by means of which the sweeper 10 can be carried.

• Bei einem Reinigungsbetrieb ist die Kehrmaschine 10 über die Aufstellebene 26 auf der zu reinigenden Fläche 24 aufgestellt. Der Schubbügel 42 ist so positioniert, dass ein auf der zu reinigenden Fläche 24 aufstehender Bediener die Kehrmaschine 10 über die zu reinigende Fläche 24 (mit Muskelkraft) schieben kann.

The sweeper 10 works as follows:

• During cleaning operation, the sweeper 10 is set up on the surface 24 to be cleaned via the installation level 26. The push bar 42 is positioned such that an operator standing on the surface 24 to be cleaned can push the sweeper 10 over the surface 24 to be cleaned (using muscle power).

Before a cleaning operation, the main sweeping roller 54 is in a height position at which it is spaced apart from the installation plane 26 and thus does not touch the surface 24 to be cleaned. This is achieved by the first end position 98 of the handle 84.

Before cleaning, an operator moves the handle 84 out of the first end position 98 and ensures that the form-fitting element 92 engages with the corresponding counter-elements 94 in the desired position of the main sweeping roller 54. The corresponding position of the fixed handle 84 outside the first end position 98 ensures that the main sweeping roller 54 (with its bristles 102) touches the surface 24 to be cleaned. Depending on the position of the handle 84 as a pivoting position relative to the rotation axis 64, the rotation axis 86 of the main sweeping roller 54 is at different heights relative to the installation plane 26. This allows adaptation to the specific surface to be cleaned.

An operator then pushes the sweeper 10 over the area 24 to be cleaned. The main sweeper roller 54 can be rotated about the rotation axis 56. A driving movement of the sweeper 10 on the floor 24 to be cleaned causes the main sweeper roller 54 to rotate about the rotation axis 56. The direction of rotation is such that sweepings that are on the area to be cleaned in front of the main sweeper roller 54 are carried along by the latter and thrown over the ramp 134 through the opening 132 into the sweepings container 108.

The sweeping machine 10 picks up sweeping material which is located below the base support 106 in front of the main sweeping roller 54.

A length of the main sweeping roller in a direction parallel to the axis of rotation 56 (in the transverse direction 34) of the chassis 12 is 50% and preferably at least 70% and in particular at least 80% of the corresponding width of the chassis 12 in this area.

By means of one or two side brushes 136, sweepings can initially be picked up outside the "track" of the chassis 12 and conveyed into this track. When the sweeping machine 10 drives over it, the main sweeping roller 54 can then also pick up this sweepings and throw them into the sweepings container 108.

The height adjustment device 72 with the handle 84 and the first end position 98, in which the main sweeping roller 54 is spaced apart from the installation plane 26 (so that none of the bristles 102 are on the installation plane 26), results in a "cleaning-free" driving operation of the sweeping machine 10. Such a driving operation is used, for example, to stow the sweeping machine or to specifically "switch off" the sweeping function by the main sweeping roller 54. Furthermore, when the sweeping machine 10 is switched off, the main sweeping roller 54 is protected because the bristles 102 are then not subjected to mechanical stress. Contact between bristles 102 and a floor leads to bristles bending and thus to mechanical stress.

For a cleaning operation, the position of the main sweeping roller 54 can be adjusted by operating the handle 84 from the first end position 98 via the height adjustment device 72 in order to be able to carry out an optimized cleaning process adapted to the surface 24 to be cleaned.

For example, bristle wear can also be compensated by adjusting the height setting.

In particular, outside the first end position 98, a plurality of discrete positions of the handle 84 and thus also a plurality of discrete height positions of the rotation axis 56 or the installation plane 26 are possible. In one embodiment, three or four such discrete positions are provided outside the first end position 98.

The sweeper 10 comprises a storage device 148. This storage device 148 is designed such that, when the sweeper 10 is set up with the installation level 26, objects and in particular a bucket can be placed on the sweeper 10 and in particular can also be transported with the sweeper 10 during a driving movement.

For the sweeper 10 ( 1 to 5 ), the storage device 148 is arranged or formed on the waste container 108.

The storage device 148 comprises a storage surface 150. The storage surface 150 is flat at least with respect to an envelope. This is explained in more detail below.

The storage area has a width B of at least 20 cm in one width direction (cf. 1 ). The width direction is parallel to the transverse direction 34 and perpendicular to the longitudinal axis 18.

In a specific example, the width B is 30 cm.

Furthermore, the storage surface 150 has a length L in a longitudinal direction parallel to the longitudinal axis 18, which is at least 20 cm.

In a specific example, the length L is 30 cm.

Furthermore, the storage area 150 has a surface area of at least 400 cm ² and in particular 500 cm ² . This surface area is at least approximately the product of the length L and the width B.

In a specific example, the surface area is 900 cm ² .

In particular, the storage surface 150 is designed such that, for example, a 10 l household bucket or a 20 l construction bucket can be positioned on the storage surface 150.

The storage surface 150 of the storage device 148 is arranged on the sweeper 10 in such a way that an object (such as a bucket) can be placed on the storage surface 150 from above. and then the storage surface 150 supports the object downwards.

The storage surface 150 is designed to be parallel to the installation plane 26, at least with respect to its envelope, or is oriented at a small acute angle of at most 10° to the installation plane 26. This prevents the object from slipping, at least when the surface 24 is flat. An anti-slip device can also be provided, which is described in more detail below.

In the sweeper 10, the storage device 148 is formed on the waste container 108 and thereby on the ceiling wall 120. An outer side 152 of the ceiling wall 120 forms or comprises the storage surface 150.

Accordingly, even when the sweeping waste container 108 is removed from the sweeping machine 10, the storage surface 150 is removed from the sweeping machine 10.

The storage surface 150 is arranged within an edge wall 154. The edge wall comprises a first lateral wall 156 which extends at least approximately parallel to the longitudinal axis 18. It further comprises a second lateral edge wall 158 which is spaced parallel to the first lateral wall 156. The first lateral wall 156 and the second lateral wall 158 are connected by an end wall 160. The end wall 160 is aligned at least approximately parallel to the transverse direction 34.

The front wall 160 faces the housing 78. The front wall 160 and the first lateral wall 156 and the second lateral wall 158 are designed such that a continuous and in particular step-free transition from the waste container 108 to the housing 78 at its top is achieved when the waste container 108 is properly seated on the sweeping machine 10.

The edge wall 154 is open towards the front end 14 (when the waste container 108 is attached to the sweeper 10); it is open facing away from the front wall 160. This allows water, in particular, which may collect on the storage surface 150 or would otherwise collect, to flow forward (towards the front end 14).

The storage surface 150 lies between the first lateral wall 156, the front wall 160 and the second lateral wall 158. A distance between the first lateral wall 156 and the second lateral wall 158 essentially defines the width B of the storage surface 150.

A distance between the end wall 116 and the opposite front end defines the length L.

Opposite the edge wall 154, the storage surface 150 is recessed.

A handle 162 is arranged on the edge wall 154 and thereby on the front wall 160. The handle 162 comprises a bracket with a free space 164 for the operator's fingers to pass through.

The dirt container 108 can be grasped via the handle 162 and removed from the sweeper 10 or inserted into the sweeper 10.

The edge wall 154 prevents objects positioned on the storage surface 150 from falling sideways and to the rear.

The storage surface 150 is assigned an anti-slip device 166. The anti-slip device 166 serves to at least make it more difficult for objects placed on the storage surface 150 to slip.

In one embodiment, the anti-slip device 166 comprises spaced webs 168 which are aligned parallel to the longitudinal axis 18 or parallel to the lateral walls 156, 158. The webs 168 are aligned transversely and in particular perpendicularly to the end wall 160.

The webs 168 are made of a slip-resistant material such as a corresponding rubber material or plastic material, at least in an area that comes into contact with an object to be deposited.

In such an embodiment, an envelope of the storage surface 150 is formed by an envelope surface on the webs 168.

The anti-slip device 168 can also have other designs, such as a slip-resistant mat which is fixedly or removably positioned between the walls 156, 158, 160.

In one embodiment, the storage surface 150 is assigned at least one fastening element, via which a fixation of objects which are positioned on the storage surface 150 (such as a bucket) can be achieved.

In one embodiment, it is provided that a fastening recess 170 or fastening eyelet 170 is arranged on the first lateral wall 156 and the second lateral wall 158. Such a fastening recess 170 is an opening which is in particular continuous between an outer side of the edge wall 154 and a space above the storage surface 150.

In such a fastening recess 170, for example, a hook of a quick release can be accommodated or a tensioning belt can be pulled through.

In one embodiment, exactly one fastening recess 170 is arranged on the first lateral wall 156 and the second lateral wall 158, wherein these fastening recesses are aligned with one another; a connecting line between these fastening recesses 170 lies parallel to the end wall 160 or parallel to the transverse direction 34 or perpendicular to the longitudinal axis 18.

Several fastening recesses 170 can also be provided per lateral wall 156 or 158.

For example, a fastening recess can also be arranged in the front area 124 of the waste container 108 or several fastening recesses can be arranged. For example, a quick release can then be arranged between such a fastening recess and the handle 162 (with its free space 164) or a tensioning belt can be passed through. In such an embodiment, a cross-guiding of a tensioning belt (between a fastening recess on the front area 124 and a fastening recess 170 on a lateral wall 156 or 158) is also possible.

Furthermore, it is also possible that one or more storage openings 172 ( 1 ) are arranged or formed. In such a storage opening 172, for example, a screwdriver or the like can be accommodated.

The storage area 150 can be used to carry an object or several objects, such as a bucket, during a cleaning operation of the sweeper 10. Such an object can be additionally secured using fastening elements 170 in order to prevent it from falling down during a corresponding driving operation.

Even when the sweeper 10 is parked and the installation level 26 is resting on a floor (in which case the handle 84 in particular is brought into the first end position 98), objects can be stored on the sweeper 10 via the storage surface 150.

The storage area 150 is arranged on the sweeping waste container 108 in the sweeping machine 10. If the sweeping waste container 108 is fixed to the chassis 12, then the storage area 150 is located in particular above the wheel axis 36 and above the rotation axis 56 of the main sweeping roller 54 with respect to the height direction 46. Furthermore, the storage area is then preferably located above the side brush(es) 136 with respect to the height direction 56.

In the 1 In the embodiment shown, the pivot axis 44 of the push bar 42 is located above the storage surface 150.

Another embodiment of a sweeper, which is in the 6 to 8 shown and designated 180, comprises a chassis 182 on which a rear wheel device 184, a front wheel device 186, side brushes 188 and a main sweeping roller 190 are arranged. The arrangement is basically the same as described above with reference to the sweeper 10.

Furthermore, a height adjustment device is provided, which is basically designed in the same way as the height adjustment device 72 of the sweeping machine 10 described above. A handle 192 is provided, which has a first setting in which the main sweeping roller 190 is spaced from a mounting plane 26. (The same reference numeral is used here as for the sweeping machine 10.)

A removable waste container 194 is mounted on the chassis 182.

A housing 196 is provided which corresponds to the housing 78.

In contrast to the housing 78 of the sweeper 10, the housing 196 also accommodates a suction fan device 198 for generating a negative pressure flow (suction flow).

A switch 200 is arranged on the housing 196, via which a motor (and in particular electric motor) of the suction fan device 198 can be activated or deactivated.

The housing 196 has a receptacle 202 for one or more batteries 204, which provide the electrical energy for operating the suction fan device 198.

The dirt container is provided with an opening 208 on its upper side 206 (which faces away from the installation plane 26). When the dirt container 194 is seated on the sweeping machine 180, a channel device 210 is connected to the opening 208, which connects an interior of the dirt container 194 with the suction fan device 198 in a fluid-effective manner (effective for a suction flow).

A filter device 212 is arranged on the duct device 210, which filters out dust particles and prevents them from reaching the blower motor or an impeller device of the suction blower device 198.

In one embodiment, the filter device 212 comprises a housing 214, which has a corresponding filter of the filter device 212. The housing 214 is a filter box of the filter device 212.

In relation to the suction flow, the filter device 212 is connected upstream of the suction fan device 198. In relation to the suction flow, it is connected downstream of the opening 208.

The housing 214 forms a bridge 216 between the channel device 210 and the housing 196, which is fixedly mounted on the chassis 182.

In the area of the housing 214, the waste container 194 is spaced apart from this housing 214.

The combination of channel device 210 and housing 214 is designed such that the waste container 194 can be easily removed from the chassis 182 and reinserted with a corresponding solution of the connection of the channel device 210 to the opening 208 or the production of this connection.

A storage device 218 with a storage surface 220 for one or more objects is formed on the bridge 216 and in particular on an upper side 222 of the housing 214. This upper side 222 of the housing 214 faces away from the waste container 194.

The storage surface 220 itself or an envelope lies parallel to the installation plane 26 or at an acute angle of at most 10° to it.

In particular, it has a length L of at least 20 cm and a width of at least 20 cm. Furthermore, it has a surface area of at least 400 ^cm2 .

In a concrete example, the length L is 24 cm, the width B is 23 cm and the surface area is 552 cm ² .

The storage surface 220 can be provided with an anti-slip device as described above with reference to the anti-slip device 166. For example, corresponding webs or an anti-slip mat are provided.

In the embodiment shown, the housing 214 has an edge wall 224 which extends in a height direction transversely and in particular perpendicular to the installation plane 26 in the direction of the waste container 194.

At least one fastening recess 226 is arranged on the edge wall 224 (see also the 7 and 8th ), which is open towards the installation level 26.

The edge wall 224 is a wall which extends parallel to the corresponding longitudinal axis (transverse to a rotation axis of the main sweeping roller 190).

A hook, such as the hook of a quick release, can be positioned on the fastening recess 226. This allows an object (such as a bucket) to be positioned on the storage surface 220.

In the sweeper 180, in particular the storage surface 220 is a highest point of the sweeper 180 relative to the installation plane 26 with the exception of a push bar 228.

The use of the bridge 216 as a storage area 220 results in an optimized use of space on the sweeper 180.

The storage device 218 with the storage surface 220 is arranged between the housing 196, which is firmly connected to the chassis 182, and the channel device 210.

In relation to the height direction perpendicular to the installation plane 26, the waste container 194 is arranged between the installation plane 26 and the storage surface 220. It can also be provided that the waste container 194 is positioned in this direction between the installation plane 26 and the suction fan device 198 in the housing 196.

The waste container 194 is also positioned between the filter device 212 and the installation level 26.

In principle, it is also possible for the channel device 210 to be designed accordingly and for the storage device 218 to be formed on the channel device 210. For example, the filter device 212 is then arranged on the housing 196.

When the sweeper 180 is in operation, a vacuum flow is provided by the suction fan device 198, which acts on the interior of the waste container 194. This vacuum flow primarily serves to minimize "dust distribution" into the environment during a sweeping process with the sweeper 180. When the sweeper 180 is cleaning with the rotating main sweeping roller 190, dust is generally swirled up, which can then be sucked away via the suction fan device 198. The suction fan device 198 primarily serves to suck up such swirled up dust and not necessarily primarily to suck up dust directly from a surface 24 to be cleaned.

In principle, it is also possible for the sweeper 180 to have the main sweeping roller 190 driven by a corresponding motor.

Otherwise, the sweeper 180 functions basically the same as the sweeper 10 with regard to the height adjustment of the main sweeper roller 190 and its distanced positioning from the installation plane in a first setting of the handle 192. Furthermore, the sweeper 180 functions basically the same as the sweeper 10 with regard to the storage device 218.

List of reference symbols

10

Sweeper (first embodiment)

12

chassis

14

front end

16

rear end

18

Longitudinal axis

20

Rear wheel setup

22

Front wheel setup

24

surface to be cleaned

26

Installation level

28

Forward direction

30

right rear wheel

32

left rear wheel

34

Transverse direction

36

Wheel axle

38

role

40

Middle level

42

Push bar

44

Swivel axis

46

Altitude direction

48

first bar area

50

second bar area

52

third bar area

54

Main sweeper roller

56

Rotation axis

58

carrier

60

Swing arm device

62

Pivot bearing

64

Rotation axis

66

first area

68

second area

70

third area

72

Height adjustment device

74

first area

76

second area

78

Housing

80

Housing interior

82

Wall

84

Handle

86

pole

88

Railway equipment

90

Circular orbit

92

Form-locking element

94

Counter elements

96

Spring device

98

first end position

100

attack

102

Bristles

104

Distance

106

Base carrier

108

Waste container

110

inner space

112

Wall

114

Front side

116

opening

118

Floor wall

120

Ceiling wall

122

Side wall

124

Front area

126

Holding device

128

lateral form-locking element

130

front form-fitting element

132

opening

134

ramp

136

Side brush

138

poor

140

Broom holder

142

Round brush

144

free space

146

Handle

148

Storage facility

150

Storage area

152

Outside

154

Edge wall

156

first lateral wall

158

second lateral wall

160

Front wall

162

Handle

164

free space

166

Anti-slip device

168

Bridges

170

Mounting recess

172

Storage recess

180

Sweeper (second embodiment)

182

chassis

184

Rear wheel setup

186

Front wheel setup

188

Side brush

190

Main sweeper roller

192

Handle

194

Waste container

196

Housing

198

Suction fan device

200

Switch

202

Recording

204

battery

206

Top

208

opening

210

Channel installation

212

Filter device

214

Housing

216

Bridge

218

Storage facility

220

Storage area

222

Top

224

Edge wall

226

Mounting recess

228

Push bar

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions.

Cited patent literature

• EP 1531202 B1 [0002, 0019, 0083]
• DE 102018104749 A1 [0003]
• DE 102018104744 A1 [0004]

Claims (18)

Sweeping machine, comprising a chassis (12; 182), a rear wheel device (20; 184) and a front wheel device (22; 186) which are arranged on the chassis (12; 182) and which define a setup plane (26) of the sweeping machine on a surface to be cleaned (24), a push bar (42; 228) which is arranged on the chassis (12; 182), a sweeping waste container (108; 194) which sits on the chassis (12; 182), at least one main sweeping roller (54; 190) which is arranged on the chassis (12; 182) so as to be rotatable about an axis of rotation (56), a height adjustment device (72) via which a height position of the axis of rotation (56) of the at least one main sweeping roller (54; 190) relative to the setup plane (26) can be adjusted, and a handle (84; 192), which can be pivoted relative to the chassis (12; 182), which is mechanically coupled to the height adjustment device (72), and via which a height position of the rotation axis (56) relative to the installation plane (26) can be set in a lockable manner by an operator, characterized in that the handle (84; 192) has an end position (98) in which the at least one main sweeping roller (54; 190) is spaced apart from the installation plane (26). Sweeper after Claim 1 , characterized by at least one of the following: - a pivoting movement of the handle (84; 192) out of the end position (98) reduces a vertical distance between the axis of rotation (56) and the installation plane (26); - a pivoting movement of the handle (84; 192) out of the end position (98) increases a contact pressure of the at least one main sweeping roller (54; 190) on the surface to be cleaned (24); - there is exactly one end position (98) in which the at least one main sweeping roller (54; 190) is at a distance from the installation plane (26); - in every fixing position of the handle (84; 192) outside the end position (98), the at least one main sweeping roller (54; 190) touches the installation plane (26); - a pivoting movement of the handle (84; 192) from the end position (98) in which the at least one main sweeping roller (54; 192) is spaced from the installation plane (26), is away from the installation plane (26). Sweeper after Claim 1 or 2 , characterized by at least one of the following: - a pivot axis (64) for the pivoting mobility of the handle (84; 192) to the chassis (12; 182) is parallel to the rotation axis (56) of the at least one main sweeping roller (54; 192); - a pivot axis (64) for the pivoting mobility of the handle (84; 192) to the chassis (12; 182) is parallel to a wheel axis (36) of the rear wheel device (20); - a pivot axis (64) of the pivoting mobility of the handle (84; 192) to the chassis (12; 182) is transverse and in particular perpendicular to a forward travel direction (28) of the sweeper; - a pivot axis (64) of the pivoting mobility of the handle (84; 192) to the chassis (12; 182) is parallel to a pivot axis (44) of the push bar (42), wherein the push bar (42) is pivotable to the chassis (12; 182). Sweeping machine according to one of the preceding claims, characterized by at least one stop (100) against which the handle (84; 192) and/or an element of the height adjustment device (72) rests in the end position (98) in which the at least one main sweeping roller (54; 192) is spaced from the installation plane (26). Sweeping machine according to one of the preceding claims, characterized in that the handle (84; 192) is assigned a track device (88), which in particular comprises a circular path when the handle (84; 192) can be pivoted to the chassis (12; 192). Sweeping machine according to one of the preceding claims, characterized in that the height adjustment device (72) comprises a swing device (60) which is seated on the chassis (12; 182) so as to be rotatable about an axis of rotation (64), wherein the at least one main sweeping roller (54; 190) is held on the swing device (60) so as to be rotatable about the axis of rotation (56). Sweeper after Claim 6 , characterized by at least one of the following: - the axis of rotation (64) of the swing device (60) is spaced from the axis of rotation (56) of the at least one main sweeping roller (54; 190); - the axis of rotation (64) of the swing device (60) and the axis of rotation (56) of the at least one main sweeping roller (54; 190) are oriented parallel to one another. Sweeper after Claim 6 or 7 , characterized in that the handle (84; 192) is connected to the swing device (60), in particular to at least one of the following: - the handle (84; 192) is rigidly connected to the swing device (60); - the handle (84; 192) is connected eccentrically to the swing device (60) with respect to the axis of rotation (64) of the swing device (60). Sweeper after one of the Claims 6 until 8th , characterized in that the swing device (60) has a first region (66), a second region (68) and a third region (70), wherein the second region (68) lies between the first region (66) and the third region (70) and the swing device (60) is held on the chassis (12; 182) at the second region (68) so as to be rotatable about the axis of rotation (64), wherein the at least one main sweeping roller (54; 190) is held on the first region (66), and wherein the handle (84; 192) is connected to the swing device (60) at the third region (70). Sweeping machine according to one of the preceding claims, characterized in that the handle (84; 192) is assigned a plurality of discrete positions at which the handle (84; 192) can be fixed with respect to its pivoting movement, wherein a discrete position is assigned to a specific height position of the rotation axis (56) in relation to the installation plane (26). Sweeping machine according to one of the preceding claims, characterized in that the handle (84; 192) comprises a form-fitting element (92) which serves to determine a pivoting position of the handle (84; 192) relative to the chassis (12; 182) and in particular to determine a height position of the rotation axis (56) of the at least one main sweeping roller (54; 190) relative to the installation plane (26). Sweeper after Claim 11 , characterized in that the form-fitting element (92) is movably and in particular linearly displaceably seated on a rod (86), wherein the handle (84; 192) is mechanically connected to the height adjustment device (72) via the rod (86). Sweeper after Claim 11 or 12 , characterized by at least one of the following: - the form-locking element (92) is designed as a sleeve which sits in particular on a rod (86); - on a track device (88) on which the handle (84; 192) is movable, one or more counter elements (94) for the form-locking element (92) are arranged for a form-locking connection, wherein in the case of a form-locking connection, a pivoting mobility of the handle (84; 192) relative to the chassis (12; 182) is blocked; - the form-locking element (92) is spring-loaded by a spring device (96), wherein in order to cancel a form-locking connection an operator must overcome a spring force of the spring device (96) by moving the form-locking element (92). Sweeping machine according to one of the preceding claims, characterized in that the chassis (12; 182) has a first region (74) on which the height adjustment device (72), the at least one main sweeping roller (54; 190) and the handle (84; 192) are arranged, and a second region (76) on which the sweepings container (108; 194) is held, wherein in a longitudinal direction (18) of the chassis (12; 182) the second region (76) follows the first region (74). Sweeping machine according to one of the preceding claims, characterized in that the at least one main sweeping roller (54; 190) is positioned between rear wheels (30, 32) of the rear wheel device (20; 184) on the chassis (12; 182). Sweeping machine according to one of the preceding claims, characterized in that a storage device (148; 218) with a storage surface (150; 220) for one or more objects is provided, wherein the storage device (148; 218) is held by the chassis (12; 182) and is parallel to the installation plane (26) or is inclined at a maximum angle of 10° to the installation plane (26). Sweeping machine according to one of the preceding claims, characterized by a suction fan device (198), by means of which an interior of the sweepings container (194) can be subjected to a negative pressure flow, and by a filter device (212) for the negative pressure flow. Sweeping machine according to one of the preceding claims, characterized by a design as a hand-held sweeping machine, which can be guided over the floor (24) to be cleaned via the push bar (42; 228).

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