EP0391010A1 - Sweeping machine - Google Patents

Abstract

A sweeping machine with a driven sweeping roller (20) whose region which comes into engagement with the ground to be cleaned is during operation moved in the direction of the forward movement of the sweeping machine and directs the collected dirt forwards and upwards into the inlet (27) of a guide channel (25) open towards the sweeping roller, with a filter housing provided above the sweeping roller and with a dirt container (30), whose filling orifice is situated at the rear end of the guide channel (25) and into which is fed, via a dirt-guiding surface, the dirt collected by the sweeping roller, permits a displacement of the sweeping roller (20) for the purpose of adjusting the width of the inlet (27) between the outer circumference of the sweeping roller (20) and the bottom surface (26) of the guide channel (25), thereby making it possible to compensate for the wear of the bristles of the sweeping roller (20). In this sweeping machine, the distance of the front edge of the dirt-guiding surface from the outer circumference of the sweeping roller (20) can be altered. <IMAGE>

Description

The invention relates to a sweeper with a rotatingly driven sweeper roller mounted in a machine frame, the area which comes into engagement with the floor to be cleaned is moved during operation in the direction of the forward movement of the sweeper and the dirt picked up and forwards into the entry gap of one leads to the sweeping roller open guide channel, with a filter housing provided above the sweeping roller, the inlet opening of which faces the sweeping roller and adjacent to the outlet opening of which is arranged a blower generating an air flow flowing from the inlet opening to the outlet opening, and with a dirt container, the filling opening of which is located at the rear Located at the end of the guide channel and into which the dirt picked up by the sweeping roller is conveyed via a dirt guide surface.

Such sweepers in the form of so-called overhead throwers are generally known, and in order to achieve an effective absorption of the dirt coming into engagement with the sweeper roller, it is necessary that the dimensions solutions of the inlet gap of the guide channel are kept constant within relatively narrow limits. However, since the bristles of the sweeping roller are ground down during operation, the distance between the outer circumference of the sweeping roller and the bottom surface of the guide channel and thus the width of the inlet gap gradually increases during operation, with the ground contact also decreasing.

In order to reverse this increase in the width of the inlet gap and to keep the bristles of the sweeping roller in engagement with the floor to be cleaned, previously relatively complex sweeping roller assemblies have been provided. For example, the bristles of the sweeping roller were attached to supports distributed around the circumference and extending parallel to the sweeping roller axis of rotation, which were radially adjustable via holder arrangements accessible from the interior of the sweeping roller, so that the wear on the outer ends of the bristles was compensated for by radially outward displacement of the supports could be. The arrangements used were not only complicated, but were also relatively difficult to handle.

It is an object of the invention to provide a structurally simple and easy-to-use option for compensating for the abrasion of the bristles of the sweeping roller in a sweeper with the construction explained above.

To solve this problem, a sweeper of the type mentioned is designed according to the invention in such a way that the sweeping roller is displaceably mounted on the machine frame to adjust the width of the entry gap between the outer circumference of the sweeping roller and the bottom surface of the guide channel, and that the distance of the front edge of the dirt guide surface from the outer circumference the roller brush is changeable.

In the sweeper according to the invention, the setting of the width of the entry gap, including maintaining the engagement of the bristles and the floor, is carried out by shifting the entire sweeper roller, for which purpose this is connected, for example by means of rod-shaped links, to points of the machine frame lying in front of and above the axis of rotation of the sweeper roller and around these points is pivotally mounted.

However, this very simple possibility of adjusting the width of the inlet gap has the result that the circumference of the sweeping roller is removed from the front edge of the dirt guide surface, which is usually formed in known machines from the bottom wall of the dirt container in the region of the filling opening, so that the Dirt conveyed through the entry gap would no longer be transported in the desired manner through the guide channel and into the dirt container without the measure according to the invention of changing the distance of the front edge of the dirt guide surface from the outer circumference of the sweeping roller, but rather partially between dirt container and sweeping roller again the ground would fall. In the sweeper according to the invention, however, the user can both change the position of the sweeper roller in order to bring the width of the inlet gap between it and the bottom surface of the guide channel to the desired size, and also change the distance between the front edge of the dirt guide surface and the circumference of the sweeper roller to prevent dirt from passing between the dirt guide surface and the roller brush and getting back onto the floor.

In one embodiment of the invention, the dirt guide surface can be part of the dirt container. In this case, the dirt guide surface can be formed by the section of the bottom wall of the dirt container which adjoins the filling opening of the dirt container, and the distance of the dirt container from the circumference of the sweeping roller can be changed.

So that such a change in the distance can be made possible in a simple manner, the dirt container can be held in a hanging manner on the side holding rails attached to the machine frame, and holders for the dirt container can be formed at a distance from one another on the holding rails, so that the dirt container can be positioned by positioning it in the desired bracket with the front edge of its bottom wall can be brought into the correct distance from the broom.

In another embodiment of the invention, in the region of the lower edge of the inlet opening of the dirt container, a wall element projecting forward and forming the dirt-guiding surface can be pivotably attached, which extends over the entire width of the inlet opening and which can be locked in different inclination positions.

With the help of such a pivotally fastened wall element, it is possible to bridge the area between the front edge of the bottom wall of the dirt container and the circumference of the sweeper roller to such an extent that there is always an optimal distance between the circumference of the sweeper roller and the front edge of the wall element forming the dirt guide surface results and the dirt transported by the sweeping roller reaches the dirt container with the help of the wall element.

With such a structure, guide walls can be attached to the lateral ends of the wall element, which extend parallel and adjacent to the side walls adjoining the inlet opening of the dirt container and have the latching openings, which can optionally be brought into alignment with a receiving opening in the associated side wall, so that the wall element can be locked in its inclined position by means of locking elements extending through the respective receiving opening and the locking opening aligned with it is, which determines the distance between the circumference of the sweeping roller and the front edge of the dirt guide surface.

It should be mentioned that, in particular with such a structure, the invention can also be implemented without changing the actual dirt container connected to the sweeper if dirt containers are additionally used in the actual dirt containers which carry the wall element.

In another embodiment of the invention, a transition plate, which is held on the machine frame and forms the dirt-guiding surface, can be provided between the sweeping roller and the lower region of the inlet opening of the dirt container, the width of said transition plate essentially corresponding to the width of the lower region of the inlet opening and the rear edge of which extends over the lower front Edge of the inlet opening extends. The distance between the front edge of the transition plate and the outer circumference of the sweeping roller is variable, so that in this way the distance between the front edge of the bottom wall of the dirt container and the circumference of the sweeping roller bridges to the desired extent and thereby the dirt transported by the sweeping roller in the dirt container is thrown.

To change the position of the transition plate, it can be pivoted about an axis lying lower than its rear edge.

• Figur 1 zeigt in einer perspektivischen Darstellung eine Kehrmaschine schräg von vorn.
• Figur 2 zeigt vereinfacht die Kehrmaschine aus Figur 1 in einer anderen perspektivischen Ansicht, wobei innen liegende Teile angedeutet sind.
• Figur 3 zeigt in einer Prinzipdarstellung die Kehrmaschine aus den Figuren 1 und 2 von der Seite, wobei unterschiedliche Lagen der Kehrwalze, des Schmutz­behälters und der Einrichtung zur Anpassung an unterschiedliche Lagen der Kehrwalze zu erkennen sind.
• Figur 4 zeigt in einer Teildarstellung die Einrichtung zur Anpassung an die Lage der Kehrwalze aus Figur 3.
• Figur 5 zeigt in einer perspektivischen Teildarstellung einen an Teleskopschienen gehalterten Schmutzbehälter, wie er in einer Kehrmaschine gemäß Figuren 1 bis 4 eingesetzt werden kann, jedoch mit einer anderen Einrichtung zur Anpassung an unterschiedliche Stel­lungen der Kehrwalze.
• Figur 6 zeigt in einer Darstellung entsprechend Figur 3 eine Kehrmaschine, die jedoch eine andere Einrichtung zur Anpassung an unterschiedliche Positionen der Kehr­walze aufweist.
• Figuren 7 und 8 zeigen in Teildarstellungen die Einrichtung zur Anpassung aus Figur 6.

The invention is explained in more detail below with reference to the figures which show schematic exemplary embodiments.

• Figure 1 shows a perspective view of a sweeper diagonally from the front.
• FIG. 2 shows in simplified form the sweeper from FIG. 1 in another perspective view, with parts lying on the inside being indicated.
• FIG. 3 shows a basic illustration of the sweeper from FIGS. 1 and 2 from the side, different positions of the sweeping roller, the dirt container and the device for adapting to different positions of the sweeping roller being recognizable.
• FIG. 4 shows a partial representation of the device for adapting to the position of the sweeping roller from FIG. 3.
• FIG. 5 shows a perspective partial view of a dirt container held on telescopic rails, as can be used in a sweeper according to FIGS. 1 to 4, but with another device for adapting to different positions of the sweeping roller.
• FIG. 6 shows a sweeper in a representation corresponding to FIG. 3, but which has another device for adapting to different positions of the sweeper roller.
• FIGS. 7 and 8 show in partial representations the device for adaptation from FIG. 6.

The sweeper shown in FIGS. 1 and 2 has a frame 1 on which rear wheels 2 and 3 and a front guide wheel 4 which is pivotally mounted about a vertical axis are mounted in a manner which is not shown but is known. On the frame 1 there is a machine housing 5 in which the one, for example, which is driven by electric batteries Motor for driving the wheels 2 and 3 and for driving the usual blower is located, which sucks an air flow through the filter housing, not shown, arranged under the housing hood 6, which is held up in the usual manner, which can be pivoted, from the sweeping roller 20 to be described, which also is driven by the motor, sucks up swirled dust through an inlet opening above the sweeping roller 20 into the filter housing and deposits it there in a filter, while the air flow of the fan exits the filter housing through an outlet opening of the filter housing, not shown, and through openings 8 in the environment arrives. Such a machine structure is known, for example from the machine Hako-Jonas 1600 from the applicant (brochure "HAKO-Jonas 1600"), and also in this known machine a driven plate brush 9 is provided, which is held on a pivotable arm 10. The machine is guided by the user who walks behind the machine with the aid of a guide bracket 7.

On the frame 1, a rear wall 34, side walls 32 and 33 and a bottom wall 31 has a dirt container 30 which is open in the area between the wheels 2 and 3 and can be removed to the rear and which is open towards the front and above and thus forms an inlet opening. In front of this dirt container is the sweeping roller 20, which is rotatably supported parallel to the axes of rotation of the wheels 2 and 3, which consists of a roller body and bristles which are held thereon and are directed radially outwards and which is provided by the motor (not shown) provided in the motor housing 5 The usual way is driven so that it rotates clockwise about the axis 21 in the illustration according to FIG. 3, that is to say throws the dirt picked up from the floor forward.

The space accommodating the sweeping roller 22 is delimited laterally by walls 12 and 13 (FIGS. 1 and 5) (not shown in FIG. 3) fastened to the frame 1 and forwardly by a bottom wall 26 which, as shown in FIG a curved path extends upwards to then transition into a straight, slightly rising course and end shortly before the inlet opening of the dirt container 30 used, in which case there is an opening (not shown) which connects to the inlet opening of the also not shown , Forms under the housing cover 5 filter housing. At the front end of the bottom wall 26 a sealing tab 16 is attached, which hangs down and with its lower edge is normally in contact with the floor to be cleaned, so that dirt thrown forward by the sweeping roller 20 through an entry gap 27 into the between the circumference of the Sweeper roller 20 and bottom wall 26 formed guide channel 25 arrives and, as is usual with overhead throwers, is moved in this guide channel over the upper region of the circumference of the sweeper roller 20 and into the dirt container 30.

In use, the bristles of the sweeping roller 20 grind as a result of engagement with the floor to be cleaned, and in order to maintain the engagement of the bristles with the floor despite this grinding and on the other hand to achieve an entry gap 27 with dimensions that do not change too much, the sweeping roller is 20 held on links 22, one end of which is pivotally connected to the axis of rotation 21 of the sweeping roller 20 and the other end of which is pivotally attached to the frame 1 above and in front of the axis of rotation 21 in a manner not shown at 23. In the area between the two articulation points of the links 22, tensioning screws 24, which are schematically shown pivotably, are attached to these, which are also pivotally connected to the frame 1. By adjusting these clamping screws 24 can be easily How to lower the sweeping roller 20 when worn along an arc running around the points 23, as indicated in FIG. 3, in which the sweeping roller 20 is drawn out in its unused starting position and is shown in broken lines in a position lowered after wear.

With such a lowering movement, the minimum distance between the outer circumference of the sweeping roller 20 and the lower edge of the inlet opening of the dirt container 30 changes, so that a large part of the dirt transported by the sweeping roller no longer gets into the dirt container 30, but between the front edge of the inlet opening of the Dirt container 30 and the circumference of the sweeping roller 20 would fall back onto the floor. In the sweeper shown in FIG. 3, therefore, on the front edge of the inclined section of the bottom wall 31 (FIG. 4) of the dirt container 30, which at the same time forms the front edge of the inlet opening of the dirt container 30, is pivotable via an elastic connection 41 and extends transversely to the inlet opening Wall element 40 attached. At the lateral ends of the wall element 40, which forms a dirt-guiding surface, guide walls 42 (only one guide wall shown) are attached which run parallel to the side walls (only one side wall 32 shown) and thus extend perpendicular to the wall element 40. In the guide walls 42, latching openings 43 are formed on a circular arc around the axis of rotation formed by the elastic connecting element 41, and in the side walls 32 of the dirt container 30 there is in each case a receiving opening 44 (only one shown), with respect to which the guide walls 42 can be aligned in this way that one of the locking openings 43 is aligned with it, as is indicated in FIG. 4. In this position, a screw or the like, not shown, can be inserted through the receiving opening 44 and the locking opening 43 aligned with it. are guided and attached so that there is an unadjustable mounting of the wall element 40 on Dirt container 30 results, and the front edge of the wall element 40 is immediately adjacent to the circumference of the sweeping roller 20, as indicated in Figure 3. As a result, the dirt transported by the sweeping roller 20 reaches the dirt container 30 via the dirt guide surface formed by the top of the wall element 40.

If the sweeping roller 20 is adjusted in the manner indicated in FIG. 3 because of the wear and tear, the distance between the front edge of the wall element 40 of the dirt container 30 used and the circumference of the sweeping roller 20 increases. The user therefore becomes the dirt container 30 which is shown in FIG 3 schematically, but suspended in the telescope rails 35 shown in more detail in FIG. 5 to be described, move from its position into the removal position indicated by dashed lines in FIG. 3 (in the removal position shown in dashed lines, wall element 40 has been omitted to simplify the illustration). In this position he can put the screw or the like through the receiving opening 44 and the flush opening 43 aligned with it. remove and then pivot the wall element 40 further down into a position, as shown in dashed lines in Figure 3, so that the front edge of the wall element 40 is again immediately adjacent to the circumference of the sweeping roller 20 when the dirt container 30 is inserted. In such a position of the wall element 40 a screw or the like is then again. inserted through the receiving opening 44 and the locking opening 43 aligned with it in the side wall 42 and the wall element 40 locked in its position. The user then brings the dirt container 30 back into the position shown in solid lines in FIG.

It should be mentioned that on the back of the sweeping roller 20 below the wall element 40, a transversely extending sheet 14 for fastening a seal hanging downward lobe 15 is provided. Details of this structure can be found in FIGS. 8 and 9, which will be described below.

In the partial representation according to FIG. 5, in which the same reference numerals or the same reference numerals are used for the same parts as in FIGS. 3 and 4, some of which were additionally designated by ', the usual structure is also used in the exemplary embodiment according to FIG. 3 Telescopic rails 35 ', 36' for holding and moving the dirt container 30 'more clearly, and the dirt container 30' has in the upper region of its side walls 32 ', 33' handles 37 ', with the help of which he together with parts of the telescopic rails 35 'And 36' in a position corresponding to the dashed line in Figure 3 slightly raised in a known manner and then can be removed from the holder.

The provided on the side walls 12 and 13 receiving rails for the telescopic rails 35 'and 36' are recesses 50 formed into the support rollers of the telescopic rails indicated in Figure 5 can snap, so as to determine the insertion position of the dirt container 30 '. By choosing the appropriate locking recess, the dirt container 30 'can thus be brought into a position in which the front edge of its bottom wall 31' lies immediately adjacent to the circumference of the sweeping roller 20. As is immediately clear, when the sweeping roller 20 wears and the resulting displacement according to FIG. 3 occurs, the dirt container 30 'is positioned in locking recesses 50, which in FIG. 5 are always further to the left.

In the exemplary embodiment according to FIGS. 6 to 9, the same parts as in the previous exemplary embodiments are identified with the same reference numerals, but optionally additionally with ˝.

As can be seen in Figure 6, the structure of the sweeper shown is essentially the same as that of the sweepers described above, and there is in particular the same possibility for shifting the axis of rotation of the sweeping roller 20 to adapt to the abrasion of its bristles, as already provided above described. In a departure from the exemplary embodiments described above, the device for ensuring the transport of dirt conveyed by the sweeping roller 20 into the dirt container 30 is designed. This device has a transitional plate 140 which extends transversely across the inlet opening of the dirt container 30 and which forms the dirt guide surface with its upper side, the rear end of which extends into the dirt container 30 and which is fastened to a carrier plate 141. In each of the operating positions to be described, the transition plate 140 has an inclination such that its rear edge, which extends into the dirt container, is lower than its front edge, which is immediately adjacent to the circumference of the sweeping roller 20. The carrier plate 141 is pivotally attached to the transverse plate 14 ', which is arranged between the side walls 12' and 13 'held by the frame 1 and is welded to them, for example, and on the lower edge of which the sealing tab 15' which is normally in contact with the floor to be cleaned is hanging is attached. To connect the carrier plate 141 and the transverse plate 14˝ serve, as can be seen particularly in FIG. 7, pivoting connections 142 having bolts. Above these pivot connections 142 there are springs 143 between the transverse plate 14˝ and the carrier plate 141, which the carrier plate 141 faces forward Apply spring force. On the side of the support plate 141 facing the cross plate 14˝, threaded bolts 144 are fastened above the swivel connections 142, which extend through corresponding bores in the cross plate 14˝ and are screwed onto the nuts 145, which prevent the pivoting movement of the support plate 141 and thus the Limit transition plate 140 by the action of springs 143.

In the position shown in solid lines in FIG. 7, a large part of the transition plate 140 projects into the dirt container 30, while the front edge of the transition plate 140 is located directly adjacent to the circumference of the sweeping roller 20 shown in solid lines, which rotates about the axis of rotation 21. If the bristles of the sweeping roller 20 are ground off during operation, a circumference is obtained and, after appropriate pivoting, a position of the sweeping roller results, as is indicated by dashed lines in FIGS. 6 and 7. In order to ensure the introduction of the dirt conveyed by the sweeping roller 20 into the dirt container 30 in this position of the sweeping roller 20, the nut 145 on the threaded bolt 144 is rotated so that the carrier plate 141 and thus the transition plate 140 due to the force of the springs 143 in move a position as indicated by dashed lines in Figures 6 and 7. In this position, the transition plate 140 is less steeply inclined than in the position shown in the extended position, but its rear end is still in the region of the inlet opening of the dirt container 30, while its front edge is immediately adjacent to the sweeper roller, which is now shown in dashed lines and has a smaller diameter 20 lies. Therefore, the dirt transported by this continues to be conveyed into the dirt container 30 via the dirt guide surface formed by the top of the transition plate 140.

Claims (9)

1. Sweeper with a rotatingly driven sweeper roller (20) held in a machine frame (1), the area that comes into engagement with the floor to be cleaned is moved in operation in the direction of the forward movement of the sweeper and the dirt picked up in the front and up Inlet gap (27) of a guide channel (25) which is open towards the sweeping roller (20), with a filter housing provided above the sweeping roller (20), the inlet opening of which faces the sweeping roller and adjacent to the outlet opening of which generates an air flow flowing from the inlet opening to the outlet opening Blower is arranged, as well as with a dirt container (30), the filling opening of which is located at the rear end of the guide channel (25) and into which the dirt picked up by the sweeping roller (20) is conveyed via a dirt guide surface, characterized in that the sweeping roller (20 ) to adjust the width of the inlet gap (27) between external erem circumference of the sweeping roller (20) and bottom surface (26) of the guide channel (25) is supported displaceably on the machine frame (1) and that the distance of the front edge of the Schmutzleitfläche from the outer periphery of the sweeping roller (20) is variable. 2. Sweeper according to claim 1, characterized in that the sweeping roller (20) by means of rod-shaped link (22) with before and above the axis of rotation (21) of the sweeping roller (20) lying points (23) of the machine frame (i) connected and around them Points is pivotally mounted. 3. Sweeper according to claim 1 or 2, characterized in that the dirt guide surface is part of the dirt container (30 '). 4. Sweeper according to claim 3, characterized in that the dirt guide surface from the inlet opening of the dirt container (30 ') adjoining section of the bottom wall (31') of the dirt container (30 ') is formed and that the distance of the dirt container (30') from The scope of the sweeping roller (20) is changeable. 5. Sweeper according to claim 4, characterized in that the dirt container (30 ') attached to the machine frame (1) attached to the side holding rails is suspended and that on the holding rails spaced brackets (50) for the dirt container (30') are trained. 6. Sweeper according to claim 3, characterized in that in the region of the lower edge of the inlet opening of the dirt container (30) is pivotally attached a forwardly projecting wall element (40) forming the dirt guide surface, which extends over the entire width of the inlet opening and which extends can be locked in different inclination positions. 7. Sweeper according to claim 6, characterized in that guide walls (42) are attached to the lateral ends of the wall element (40) which extend parallel and adjacent to the side walls adjoining the inlet opening of the dirt container (30) and the latching openings (43 ) which can optionally be brought into alignment with a receiving opening (44) in the associated side wall (32), and that Wall element (40) can be locked in its inclined position by means of locking elements extending through the respective receiving opening (44) and the latching opening (43) aligned with it. 8. Sweeper according to claim 1 or 2, characterized in that between the sweeping roller (20) and the lower region of the inlet opening of the dirt container (30) is provided on the machine frame (1), the dirt guide surface forming transition plate (140) is provided, the width of which is substantially corresponds to the width of the lower region of the inlet opening and whose rear edge extends beyond the front lower edge of the inlet opening, and that the distance between the front edge of the transition plate (140) and the outer circumference of the sweeping roller (20) is variable. 9. Sweeper according to claim 8, characterized in that the transition plate (140) about a lower than its rear edge axis (142) is pivotally mounted and can be positioned in a predetermined position.

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