EP2778286B1 - Front unit for road cleaning vehicle - Google Patents

Description

The invention relates to a stem for a road cleaning vehicle for cleaning a floor surface, in particular road or traffic area, of impurities, preferably for removing oils, fats and paints.

A stem for a street cleaning vehicle is a unit that is attached to the front of a vehicle, ie in the direction of travel, for cleaning a floor surface. With road cleaning vehicle so every vehicle is meant, which can be used by such a stem for cleaning a floor surface.

The publication DE 20 2010 010286 U1 relates to such a stem with in the working direction successively arranged work areas sweeping or sweeping unit, spraying or liquid unit and suction or suction unit, which are such that the respective cleaning tools in the respective work area are separately height adjustable and adjustable and / or folded up. This has the effect that, if necessary, the different work area or units can be switched on or off separately.

The publication EP 1 593 334 A2 discloses a mobile floor cleaning machine in which various modes of operation can be selected. Cleaning tools such as sweeping roller, disc brush and scouring roller can be activated. Through the floor cleaning machine, a cleaning liquid can be sprayed and sucked.

It is an object of the invention to provide against an improved prior art.

A stem with particularly low tax expense to be provided in particular. The object is solved by the features of claim 1. Advantageous embodiments emerge from the subclaims.

To solve the problem, a stem is provided in the following unit or work area can only be activated together. Namely, on the one hand the liquid unit, with the liquid can be applied to the ground, together with the suction unit for sucking off the liquid and impurities. Separately, the sweeping and vacuuming operations can also be activated only together, so as to introduce dirt into a cleaning hood of the stem and to suck.
With dirt or impurity solid and / or liquid dirt or contaminants of any kind are meant in untreated and / or bound by detergent or treated condition.
The idea behind this is the realization that either applying liquid together with suction is required, or sweeping and sucking. It is therefore not necessary to be able to activate all units separately from each other, as the document DE 20 2010 010286 U1 provides. Furthermore, a drive unit for separately moving the suction unit or a suction tube can be saved, whereby the stem can be made with very little effort.
In one embodiment, the sweeping unit and the suction unit as well as the liquid unit and the suction unit can only be combined be deactivated. A stem with particularly low control effort can be provided.
In one embodiment, it is also possible to simultaneously activate and / or deactivate the sweeping unit and the suction unit as well as the liquid unit and the suction unit. As a result, all three units can be activated together in order to achieve a particularly reliable cleaning of the floor surface for certain contaminant situations, for example, at the same time solid and liquid impurity components on the floor surface.

The stem is inventively constructed so that a movement can be performed, which is able to move the cleaning hood from a starting position to a working position and vice versa. There are two different working positions, namely an inclined position, in which the cleaning hood is inclined so that it encloses an angle with the horizontal when the stem is mounted on a street cleaning vehicle. This inclination is intended for sweeping and sweeping. It remains between the substrate and cleaning hood in operation a gap on the front. At the rear then preferably no gap between the substrate and Reinigungshaube.Mit front meant the side that lies during the usual driving the street cleaning vehicle forward, If the cleaning hood has been moved to the second working position, the cleaning hood is in a horizontal position. In the horizontal position, the cleaning hood extends parallel to the horizontal. During cleaning, there is basically no gap or at least substantially no gap between the cleaning hood and the substrate. In this working position, liquid is applied and then suctioned off. This serves to provide a technically simple constructed and reliable working stem.

In the initial position, the cleaning hood is always above its working position when the stem is attached to the street cleaning vehicle. The stem is lowered starting from this starting position and / or tilted to get into the working position. The movement into the working position takes place in a technically simple embodiment by gravity. The movement back to the starting position is preferably carried out by machine, for example hydraulically, pneumatically or electrically.

The initial position of the cleaning hood is preferably also a horizontal position to keep the required space low.

In one embodiment of the invention, the stem is constructed so that a tilting movement can be performed, which can tilt the cleaning hood from a substantially horizontal horizontal position in an inclined position and vice versa. By means of such a tilting movement can be made possible in a particularly simple manner that without an additional drive unit for separately moving the suction unit, the sweeping and sucking operations by the inclination and the operations apply liquid and suction can be realized by the horizontal position of the cleaning hood. In addition, the tilting allows a manual activation to take the horizontal position or the inclination, whereby an additional hydraulic unit can be saved. Furthermore, additional parts could be saved by the tilting movement, which generate when sweeping and sucking an opening to the cleaning hood for introducing the dirt in the cleaning hood and apply this opening in the operations liquid and close suction.

In one embodiment, the stem is such that when taking the inclined position of the cleaning hood, the sweeping unit and the suction unit are automatically activated and / or the liquid unit and the suction unit are automatically activated when the horizontal position of the cleaning hood is removed. In addition, a time delay of the activation can preferably be provided. By automatically activating the appropriate units, a reduced tax stem can be provided which allows for a particularly easy handling for the user. In one embodiment, the sweeping unit comprises at least one rotating sweeping brush, preferably exactly two sweeping brushes, for sweeping impurities centrally in front of the cleaning hood. Preferably, one or more sweeping brush pairs in front of the cleaning hood, ie in the direction of travel, arranged and rotate against each other from outside to inside. By providing one or more sweeping brushes or sweeping brush pairs for sweeping impurities in the center of the cleaning hood, a particularly efficient cleaning is made possible.

In one embodiment, the liquid unit is such that liquid is applied at high pressure to the bottom surface, preferably at 150 bar to 250 bar, preferably 180 bar to 220 bar, more preferably 190 bar to 210 bar at a flow rate of preferably 20 l / min to 40 l / min, preferably 25 l / min to 35 l / min, more preferably 28 l / min to 32 l / min. Tests have shown that such a pressure and flow rate allow particularly effective cleaning.

In one embodiment, the liquid unit is such that the liquid applied to the bottom surface comprises a surfactant

Component comprises, preferably in a proportion of 1% to 5%, preferably 2% to
4%, more preferably 2.5% to 3.5%. The addition of surfactant enables particularly effective cleaning.

In one embodiment, a spraying device for a pre-cleaning can additionally be activated, preferably with already activated sweeping unit and suction unit. The spraying device for pre-spraying liquid for a pre-cleaning brings liquid - separate from the aforementioned liquid unit for applying liquid - preferably in the area of sweeping brushes of the sweeping unit, for example on the sweeping brushes or next to the sweeping brushes. By pre-spraying of liquid through the spray, especially in the field of sweeping busts is possible that even heavy dirt can be solved very reliable.

In one embodiment, a special cleaning agent is used as spraying agent for the spraying device, which usually contains a surfactant and is sprayed at low pressure. By using the special cleaning agent instead of, for example, water as a spray it is possible that even heavy dirt can be solved particularly reliable. Furthermore, can be dispensed with by the provision of a special cleaning agent to high pre-spray pressure and thus a Vorsprüheinrichtung be made with very little effort.

In one embodiment, a bottom lip, which is disposed close to the vehicle, on the bottom surface, when the cleaning hood has been brought into the inclined position and drained. The bottom lip is preferably attached to the cleaning hood and in particular at the rear end, ie opposite to the direction of travel. But the bottom lip can also be arranged separately from the cleaning hood. With the help of such a bottom lip dirt can be introduced into the cleaning hood in an inclined position and sucked off, which would otherwise remain lying. A particularly thorough cleaning or a particularly high cleaning speed can be achieved.

In one embodiment, the inclined position releases a gap in the direction of travel, which may preferably be 20 mm to 200 mm, preferably 50 mm to 150 mm, particularly preferably 80 mm to 120 mm. By creating such a gap, the dirt can reach the area under the cleaning hood and be sucked off particularly effectively.

In one embodiment, the stem provides a horizontal position, which is designed in the discharged state so that between the cleaning hood and the ground surface, a closed space can be generated. By drained state, it is meant that the cleaning hood is located in a position lying mostly near the ground or lying on the ground, which is provided for cleaning the ground surface. Leakage of liquid and impurities can thus be minimized and a particularly thorough cleaning possible.

In one embodiment, the cleaning hood has at least one sealing lip, which seals the cleaning hood to the bottom surface in a horizontal position in the deflated state and is lifted off the bottom surface in an inclined position of the cleaning hood. If a sealing lip is made in one piece with the bottom lip, the term "sealing lip" refers to the section which is lifted off the bottom surface in an inclined position in the deflated state of the cleaning hood. By one or more such sealing lips a particularly thorough cleaning in horizontal position and a particularly low wear in skewed position can be made possible.

In one embodiment, the sealing lip and / or bottom lip made of plastic and in particular of elastic rubber mats. A sealing lip or bottom lip made of plastic allows a particularly good seal to the soil surface. A particularly thorough cleaning can be realized with little effort.

In one embodiment, the suction unit comprises at least one suction pipe arranged on the rear side of the cleaning hood, preferably exactly two suction pipes, in particular fixedly attached to the cleaning hood. Firmly attached means not movable or firmly mounted. By arranging a suction pipe, preferably two suction pipes, at the rear of the cleaning hood can be made possible in a particularly simple manner that a particularly efficient suction both in an inclined position and in horizontal position in the discharged state can be made possible. A separate drive for separately moving the suction pipe can be avoided.

In one embodiment, the stem is arranged so that the stem for rapid driving of the road cleaning vehicle can be brought into a raised from the ground basic position, in particular by a hydraulic device. You can raise or lower with a hydraulic device. By providing a basic position even a far away place of use can be reached very quickly and the contamination can be eliminated.

In one embodiment, the tilting of the cleaning hood into the oblique position and / or the movement into the horizontal position takes place electronically, preferably with a hydraulic adjusting unit, which is usually driven by a motor. Due to the electronic activation and the provision of a particular motor-operated hydraulic adjusting unit, via which the activation is motorized or automated, a particularly simple and associated with little effort handling for the user is possible.

In one embodiment, the tilting of the cleaning hood in the skew and / or the movement can be manually activated in the horizontal position. Manual activation of tilting in this context means a mechanical release, usually with the use of physical strength. Pressing a button is not a manual activation of tilting. A manual activation can be realized, for example, by manually releasing or locking a fuse. By manual activation, a stem can be made with very little effort.

In one embodiment, a cover for protection of hydraulics and electronics is provided. Through the cover a particularly long life of the stem and a low maintenance costs can be achieved.

In one embodiment, the stem has at least one roller and / or a pair of rollers for spacing the cleaning hood from the bottom surface in the drained state. Preferably, a pair of rollers at the rear of the stem, a further pair of rollers in the front and a steering roller are arranged at the front. By rolling a swinging up and down of the stem in the deflated condition of the cleaning hood in horizontal position and in an inclined position when cleaning a soil surface avoided and a constant distance of the cleaning hood from the soil surface can be ensured even with unevenness. The at least one pair of rollers causes a particularly large stabilization of the stem especially in an inclined position. The steering wheel causes a more even load distribution on the rollers and a particularly large stabilization of the front of the cleaning hood in horizontal position. A particularly efficient and reliable cleaning can be made possible.

In one embodiment, the width of the cleaning hood is 1000 to 2000 mm, preferably 1300 mm to 1700 mm, particularly preferably 1400 mm to 1600 mm. The width of the cleaning hood is typically measured between the rollers of the outer roller pair with the greatest distance to each other, as far as the rollers are arranged in pairs. By a stem with this width, a particularly efficient cleaning of the soil surface can be effected.

In one embodiment, the cover for hydraulics and electrics is made narrower than the cleaning hood and in particular 500 mm to 1000 mm, preferably 600 mm to 900 mm. Through a cover of this width, the user is granted a particularly large field of view on the contaminated floor surface when driving the street cleaning vehicle. A dirty floor surface can be cleaned very quickly and efficiently.

In one embodiment, the cleaning hood can be moved to the left and right relative to the cover and in particular 300 mm to 900 mm, preferably 450 mm to 750 mm. Edge areas of the soil surface, such as gutters, can be better achieved as needed. Furthermore, the field of view is not restricted by the relative movement of the cleaning hood to the cover. A dirty floor surface can be cleaned very quickly and efficiently.

In one embodiment, a lever mechanism for generating a tilting movement of the cleaning hood from the horizontal position to the inclined position and vice versa is provided. By this lever mechanism, the operations of applying liquid and suction, and sweeping and sucking without a drive unit for moving the suction unit separately can be realized. The stem can be produced with very little effort.

In one embodiment, the lever mechanism is such that the tilting movement is realized by means of a folding movement. A manual activation by manually releasing or locking a fuse for tilting in the skew or horizontal position can be so easily realized and a stem can be made with little effort.

In one embodiment, at least one fuse, in particular locking bolt, provided for releasing and locking the horizontal position and tilt. A manual activation of tilting in the skew or horizontal position can be particularly easily realized and a stem can be made with little effort.

In one embodiment, the lever mechanism is such that a tilting movement for taking the inclination manually activated only in the basic position and / or a tilting movement for taking the horizontal division can be manually activated only in the deflated state. A particularly simple manual activation of tilting in the skew or horizontal position is thus made possible.

• Figur 1: Vorbau (Draufsicht)
• Figur 2: Vorbau mit Reinigungshaube in Schrägstellung (Vorderansicht)
• Figur 3: Vorbau mit Reinigungshaube in Schrägstellung (Seitenansicht)
• Figur 4: Vorbau mit Reinigungshaube in Horizontalstellung (Seitenansicht)

The invention is based on the in the FIGS. 1 to 4 Illustrated embodiment explained in more detail. Show it:

• FIG. 1 : Stem (top view)
• FIG. 2 : Stem with cleaning hood in inclined position (front view)
• FIG. 3 : Stem with cleaning hood in inclined position (side view)
• FIG. 4 : Stem with cleaning hood in horizontal position (side view)

That in the FIGS. 1 to 4 embodiment shown relates to a stem 1 of a street cleaning vehicle for the special application The removal of oils, fats and paints from a road or traffic surface as the ground surface 2. A vehicle 3, which together with the stem 1 forms a road cleaning vehicle, usually has a width of 2.30 m. To attach the stem 1 front of the vehicle 3, ie in the direction of travel 5, serves a receptacle. 4

In practice, there are usually two applications. For one thing, a cleaning agent has already been applied to a contaminated floor section. For example, the fire brigade spread an oil binder over oil. For this case swept and sucked. Otherwise, by applying liquid and suction, the impurities such as oils, fats and / or colors are removed.

For the two applications mentioned above, two positions of a cleaning hood 7 are provided: an inclined position (FIG. Fig. 2 and 3 ) for the sweeping and sucking operations and a horizontal position ( Fig. 4 ) for the operations of applying liquid and suction.

Both positions of the cleaning hood 7 can only be activated manually in the present embodiment. The provided for manual activation lever mechanism 18 provides that the inclination of the cleaning hood 7 can be taken only from a raised basic position out. By pulling out the locking pin 19 from corresponding bolt receptacles, the cleaning hood 7 tilts due to gravity from the horizontal position in the inclined position. To lock the inclined position, the locking pins 19 are inserted again into the bolt receptacles.

A tilting of the cleaning hood 7 from the inclined position in the horizontal position is manually possible only in the discharged state ( Fig. 3 ). By pulling out the locking pin 19 from the Studs tilts the cleaning hood 7 due to gravity in the horizontal position in the discharged state. Again, the locking pin 19 must be reintegrated into the bolt receptacles to lock the horizontal position.

There is no particular order to follow when pulling out or inserting the locking pin 19 in the fuses. The bolt receptacles may include different openings for locking the inclination and horizontal position.

The use of locking pin 19 for locking and releasing positions of the cleaning hood 7 is particularly easy to implement by providing a folding movement of the lever mechanism 18 ( 3 and 4 ).

If electrical activation is desired as an alternative or in addition to manual activation, however, lever mechanism 18 can also be realized by means of a hydraulic adjusting unit.

By tilting the cleaning hood 7 in an inclined position, the sweeping unit and the suction unit are automatically activated and automatically activated by tilting in the horizontal position in the discharged state, the liquid unit and the suction unit.

Such activation is usually provided with a time delay, so that the user can calmly lock the position of the cleaning hood by inserting the locking pin 19 in the fuses before the operations are activated.

A separate or separate activation of the sweeping unit, the liquid unit and the suction unit is not possible in the present embodiment.

In the basic position, the stem is raised so far from the ground that a fast driving of the road cleaning vehicle, for example, up to 80 km / h is possible. The cleaning hood 7 can assume either the inclination or the horizontal position in the basic position. A hydraulic device 9 ensures the lowering and raising in the basic position, with loads of 100 to 200 kg are moved. The hydraulic device 9 is arranged together with the electrical system and other components of the stem under a cover 10 and protected. Illuminants 1 1 on the cover improve visibility in the dark.

FIG. 1 shows a cleaning hood 7 in an inclined position in the discharged state when sweeping and sucking. By the kehreinheit, which in FIG. 1 with the exception of the sweeping brushes 6 and in the FIGS. 2 to 4 is completely hidden, the dirt is swept in the center of the cleaning hood 7 using the two counter-rotating sweeping brush 6.

In order that the greatest possible proportion of the dirt so swept in front of the cleaning hood 7 can also be introduced and sucked into the cleaning hood 7, a gap 8 in the direction of travel 5 is released to the bottom surface 2, which is approximately 100 mm ( Fig. 2 and 3 ).

A bottom lip 13, which essentially consists of an elastic rubber mat, is fastened near the vehicle to the cleaning hood 7 in such a way that the bottom lip 13 essentially rests on the floor surface in an inclined position and can regularly grind over the ground during movement of the street cleaning vehicle. Particularly little dirt thus remains on a road section after passing this road section through the street cleaning vehicle. The remaining sealing lips 14 of the cleaning hood 7 are lifted from the ground.

To solve particularly heavy pollution is also an additional spray (in the FIGS. 1 to 4 not shown) for pre-spraying or pre-cleaning, which can be switched on in any operating state and sprayed with low pressure surfactant-containing detergent on or next to the sweeping brushes 6.

The cleaning hood 7 has at the rear end, ie opposite to the direction of travel 5, two suction pipes 12 of the suction unit. The entrained by the bottom lip 13 dirt can be sucked so effective. Furthermore, could be saved by moving the suction tubes 12 at the rear end of the cleaning hood 7, a separate drive for moving the suction unit. For both in inclined position and in horizontal position can attach to the cleaning hood 7 in a fixed position suction unit support a particularly effective cleaning.

FIG. 4 shows the stem 1 with cleaning hood 7 in horizontal position in the discharged state. In horizontal position of the cleaning hood 7 oils, fats and / or colors are removed from a road or traffic area by applying liquid through the liquid device and suction through the suction device.

A closed space can be created between the cleaning hood 7 and the bottom surface 2 by means of the sealing lips 14 and the bottom lip 13, which are generally resting on the ground or, when the road cleaning vehicle regularly moves over the ground. By a liquid supply line 15 of the liquid unit is applied under high pressure with 200 bar and a flow rate of about 30 l / min water with about 3% surfactant content to the soil surface 2 within the closed space. Leakage of liquid of the cleaning unit and / or impurities can be minimized by means of the sealing by the bottom lip 13 and the sealing lips 14 and a particularly thorough cleaning can be made possible.

The cleaning hood 7 is held by a steering roller 16 and two pairs of rollers 17 at a constant distance from the bottom surface 2. In an inclined position of the cleaning hood 7, the steering roller 16 is lifted from the ground.

The width of the cleaning hood is about 1500 mm measured between the rollers of the outer roller pair 17 and the cover 10 is about half as wide as the cleaning hood 7. From the in the FIGS. 1 and 2 shown center position of the cleaning hood 7, the cleaning hood 7 relative to the cover 10 about 500 mm to 700 mm to the left and right are moved to areas to the left or right of the vehicle contour, such as a gutter, capture.

Claims (9)

1. Front unit (1) for a road cleaning vehicle for cleaning a ground surface (2), in particular road or traffic surface, of dirt, specifically preferably for removing oils, fats and paints, having a sweeping unit for sweeping, a liquid unit for applying liquid to the ground surface (2) and a suction unit for sucking off the dirt, characterized in that the sweeping unit and the liquid unit can each only be activated together with the suction unit, wherein the front unit (1) is constructed in a way that a tilting and/or lowering movement can be carried out, which can bring a cleaning hood (7) of the front unit from an initial position into a working position and vice versa, wherein there are two working positions, namely a horizontal position in which the cleaning hood extends parallel to the horizontal for the working operations applying liquid and suction as well as an inclined position in which the cleaning hood is inclined in such a way that it forms an angle with the horizontal for the working operations sweeping and suction that bring the dirt into the cleaning hood and sucking it off.
2. Front unit (1) according to the preceding claim, characterized in that the sweeping unit and the suction unit can be automatically activated when reaching the inclined position of the cleaning hood (7) and/or the liquid unit and the suction unit can be automatically activated, preferably with a time delay, when reaching the horizontal position of the cleaning hood (7) in the lowered state.
3. Front unit (1) according to one of the preceding claims, characterized by a ground lip (13) which, when cleaning hood (7) is lowered, can abut on the ground surface (2) in inclined position and is preferably arranged at the cleaning hood (7), in particular at the rear end of the cleaning hood (7).
4. Front unit (1) according to one of the preceding claims, characterized by a gap (8) between the ground surface (2) and the lowered cleaning hood (7) in inclined position, which can preferably be 20 mm to 200 mm, preferably 50 mm to 150mm, particularly preferably 80 mm to 120mm in size.
5. Front unit (1) according to one of the preceding claims, characterized in that the suction unit has at least one suction pipe arranged at the rear side of the cleaning hood (7), which is fixed in particular firmly to the cleaning hood (7).
6. Front unit (1) according to one of the preceding claims, characterized by an initial position in which the front unit (1) is raised from the ground for fast driving of the road cleaning vehicle, in particular by a hydraulic device (9).
7. Front unit (1) according to one of the preceding claims, characterized by a lever mechanism (18) for creating a tilting movement of the cleaning hood (7), in particular by means of a folding movement.
8. Front unit (1) according to one of the preceding claims, characterized in that moving or tilting of the cleaning hood (7) can be manually activated to reach an inclined position and/or horizontal position.
9. Front unit (1) according to the preceding claim, characterized in that, for manually activating the tilting or moving of the cleaning hood (7), it is provided at least one safety device, in particular locking pin (19), for releasing and locking the horizontal position and inclined position of a cleaning hood.

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