EP1237457A1

EP1237457A1 - Cleaning device for the surface of a facade

Info

Publication number: EP1237457A1
Application number: EP00982752A
Authority: EP
Inventors: Julius Thurnher
Original assignee: Thurnher Julius
Current assignee: THURNHER, JULIUS
Priority date: 1999-12-16
Filing date: 2000-12-11
Publication date: 2002-09-11
Anticipated expiration: 2020-12-11
Also published as: ATE240677T1; US20030140438A1; CN1170507C; JP3795397B2; DE50002307D1; WO2001043614A1; CA2394382A1; ES2199886T3; CN1423539A; US7007334B2; ATA212599A; AU1975301A; JP2003516792A; AT411728B; CA2394382C; EP1237457B1

Abstract

A cleaning device ( 9 ) for a facade surface ( 3 ) of a building ( 1 ), comprising at least one elongate wiper strip unit ( 10 ) movable back and forth along at least one guide rail unit ( 6 ) by means of a stationarily arranged drive motor ( 45 ), the wiper strip unit extending at right angles to the guide rail unit ( 6 ), and comprising at least one cleaning fluid line ( 29 ) with which spray nozzles ( 31 ) directed towards the surface ( 2 ) to be cleaned are connected; for a simple, space-saving design thereof, the wiper strip unit ( 10 ) includes at least one carrier ( 19 ) slidingly guided in the guide rail unit ( 6 ), the carrier being tightly connected to a linear driving element ( 32 ), e.g. a toothed belt ( 33 ) that is movable along the guide rail unit ( 6 ), the stationarily arranged drive motor ( 45 ) being associated with this driving element.

Description

Cleaning device for a facade surface

The invention relates to a facade cleaning device for a facade surface of a building, with at least one elongated wiper strip unit that can be moved back and forth with the help of a stationary drive motor along at least one guide rail unit, and extends at right angles to the guide rail unit, and with at least one cleaning liquid line with which the surface to be cleaned is connected to directed spray nozzles.

Such a cleaning device is known from EP 709 054 A, wherein in one embodiment of this known cleaning device the wiper strip unit is moved horizontally over the height of the facade and in another vertically along guide rails which are attached to the facade. The wiper strip unit of this known cleaning device is equipped with its own motors, on the one hand to drive the wiper strip unit along the guide rails, in which driven gearwheels engage with a stationary toothed rail, and on the other hand to drive a pump in order to counteract cleaning liquid via the spray nozzles provided in the area of the wiper strip to spray the surface to be cleaned. This known cleaning device is therefore quite complex in construction, the effort being all the more important since several such cleaning devices are arranged side by side per facade and each of these cleaning devices has a wiper strip unit with its own motor drive, etc. In addition, the wiper strip units, which can be moved in the manner of a car, are relatively voluminous due to the installation of the two motors and the pump for the cleaning liquid, although it would be desirable for the cleaning devices not to impair the appearance of the building facades or not to impair them significantly.

A window cleaning device is known from EP 0 047 344 A1, in which a spraying and / or wiping unit with the aid of a spindle and a nut mounted on the spindle, which is rigidly connected to the spraying or wiping unit, along the window pane is movable. Such a spindle drive is relatively complex and massive, and this is all the more true if a spindle drive extends over the entire height of a Building - in the case of a facade cleaning device - must extend, where then there is also a high risk of self-locking.

US Pat. No. 4,257,138 A describes a comparable automatic window cleaning device in which a cleaning unit is slidably mounted by means of spindles arranged on both sides of a window pane. In addition, a brush unit is provided which is rotatably driven by a bevel gear drive. Here, too, there is again a complex construction of the drive of the cleaning unit.

DE 39 23 070 A shows a window cleaning device with a cleaning element which is movably arranged on a window frame and which contains a brush between two rubber strips. A cleaning solution is supplied from the side into the space between the rubber strips, but this is only distributed unevenly over the width, especially in the case of larger widths of the surface to be cleaned.

Finally, EP 302 343 A discloses a windshield cleaning system, in particular for motor vehicles, in which a windshield wiper can be moved back and forth along a window with the aid of two opposing belts as drive means. With the help of opposing belts, an inclined position of the windshield wiper should be made possible, but a rather complex drive device is obtained which is only suitable for small window panes.

It is now the aim of the invention to provide a cleaning device of the type mentioned, which has a simple, efficient design that takes up little space, so that it hardly catches the eye on a building facade, and moreover simply on existing building facades in retrospect can be attached. In addition, the risk of jamming or self-locking of the drive should be low.

The cleaning device according to the invention of the type mentioned at the outset is characterized in that the wiper strip unit has at least one driver which is slidably guided in the guide rail unit and is firmly connected to a linear drive element which can be moved along the guide rail unit and to which the stationary drive motor is assigned. With such a construction, the above objective is advantageously met, wherein in particular, the wiper strip unit can be kept comparatively compact and small, since it has no drive units to take up. The linear drive element, which is driven back and forth, is accommodated in the guide rail unit, and it can be, for example, a drive cable, a drive belt or the like. , preferably a toothed belt; this drive element is firmly coupled to the driver of the wiper strip unit, which is thus driven back and forth by the drive element and takes the actual wiper strip unit along with it along the facade surface to be cleaned. The risk of self-locking of the drive compared to known spindle drives can be significantly reduced, which also reduces the time and costs for any repair or maintenance work. In the case of small versions, it would theoretically be conceivable for such a driver to be present only on one side of the wiper strip unit, so that the wiper strip unit projects freely from the driver, ie from the guide rail unit; this would also be conceivable above all if the reciprocating movement of the wiper strip unit with the driver is horizontal. However, in view of the then simpler guide construction, a vertical movement of the wiper strip unit is preferably provided, the wiper strip unit also having a corresponding width for the purpose of cleaning larger facade surfaces in one cleaning process, so that it is then expedient to carry drivers at both ends of the wiper strip unit attached to guide the wiper strip unit on both sides in guide rail units. The drive elements in the guide rail units can be driven by a common stationary drive motor, via appropriate gears and shafts, so that the effort involved is additionally reduced, apart from the fact that a stationary drive motor already helps to reduce the design effort for the cleaning device.

As already mentioned, the drive element could be a rope or a belt, for example, and it would also be conceivable to unwind this drive element from drums or to wind them on drums if the wiper strip unit is to be moved back and forth. However, for efficient, space-saving training, it has proven to be particularly advantageous if the drive element is an endless drive element which is arranged around two wheels which are arranged in a stationary manner beyond the reversal points of the movement stroke of the wiper strip unit or the like. is looped, one of which can be driven by the drive motor.

If the wiper strip is designed with a correspondingly rigid strip body or support body, it can be connected directly to the driver, so that no further structural measures are necessary for the attachment of the wiper strip. However, in order to be able to design the wiper strips, which wear out during operation, as a simple wear part, and also with a view to a covering desired for protection reasons and for optical reasons, it is particularly advantageous if the driver is connected to a housing of the wiper strip unit, in which a wiper strip is attached, which protrudes with a long side through a slot opening of the housing. In order to be able to compensate for assembly tolerances in the area of the guide rail units and the carriers guided therein, which under certain circumstances can lead to slightly different distances between the guide rail units, it is also advantageous if the housing can be adjusted in the longitudinal direction with the carrier , e.g. is connected via a pin-slot arrangement.

In order that the wiper strip can be easily moved over obstacles present on the facade surface to be cleaned without excessive stress, it is also advantageous if the wiper strip is accommodated so that it can move back and forth in the housing to the surface to be cleaned. In view of a simple, effective construction, it is also advantageous if the wiper strip is resiliently biased towards the slot opening of the housing. To achieve a controlled evasive movement of the wiper strip, it is particularly advantageous if the wiper strip is connected to a cam follower projecting out of the housing through an opening, to which, if necessary, at least one control cam is assigned, which is horizontal in the area of a surface opposite the plane of the surface to be cleaned projecting facade part, such as a connecting profile between glass panes, is arranged, the wiper strip being movable back over the projecting facade part by the cam follower moved over the control cam in the housing. cn F Di ^| Q Φ cn CΛ Ω φ 0 rt Hi tr s Φ Di ir 4 g iQ <ü

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Unit 10, the plate 48 can be firmly connected to the housing 12, for example by screwing or welding or riveting. The horizontal mobility given by the pin-slot arrangement 52, 51 can compensate for any manufacturing and assembly tolerances when attaching the guide rail units 6 to the facade 3, should the respective adjacent guide rail units 6, between which the respective one lies, on the basis of these tolerances Wiper strip unit 10 extends, do not have a constant distance over the entire height of the building 1.

As already mentioned above, the wiper strip 14 is arranged in the housing 12 of the wiper strip unit 10 so as to be adjustable inwards and outwards, the spring 17 pressing the wiper strip 14 outwards, ie against the glass surface 2. As a result, the wiper strip 14 can move into the housing 12 in the event of obstacles on the facade surface 3, so that its front lip part 53 (see FIG. 5) is protected. In order to control this retraction movement, control cams 54 can be attached to the guide rail unit 6 in the area of such obstacles, ie projecting facade parts, on the facade surface 3, which are formed, for example, by the aforementioned horizontal connecting profiles 5 between the glass surfaces 2, cf. in particular also FIGS. 3 and 4 and FIGS. 5 to 7. These control cams 54 can each be attached to the cover profile 26, for example screwed on. The profile surround 15 of the respective wiper strip 14 is also firmly connected to a bearing part 55 for a freely rotatable roller 56 provided as a cam follower. When the wiper strip unit 10 moves up and down, when the toothed belt 33 is driven, the roller 56 thus runs against the respective control cam 54, which is designed with corresponding ramps 57, 58, and lifts the wiper strip 14 from the glass surface 2 or more precisely from the obstacle, ie from the connection profile 5, cf. 5, 6 (where the roller 56 is just rolling over the upper ramp 57) and FIG. 7 (according to which the roller 56 has pulled the wiper strip 14 fully back). Following this, the compression spring 17 only shown in FIG. 5 presses the wiper strip 14 back towards the glass surface 2 when it moves over the ramp 58 to the guide rail unit 6 so that it can continue its cleaning activity there. The spray nozzles 31 can have nozzle cross sections or spacings which vary over the height of the building 1 in order to compensate for a pressure drop which results from the height of the line 29 or the facade 3; In the arrangement according to FIG. 1, the spray nozzles 31, the higher they are arranged, can be arranged closer together, and they can also have smaller nozzle openings so that the cleaning liquid is sprayed onto the glass surfaces 2 sufficiently far even at greater heights ,

Claims

Claims:

1.Cleaning device for a facade surface of a building, with at least one elongated wiper strip unit which can be moved back and forth along at least one guide rail unit with the aid of a stationary drive motor, and with at least one cleaning liquid line, with which the surface to be cleaned extends at a right angle to the guide rail unit Directional spray nozzles are connected, characterized in that the wiper strip unit (10) has at least one driver (19) which is guided in the guide rail unit (6) and is firmly connected to a linear drive element (32) which can be moved along the guide rail unit (6) and which the stationary drive motor (45) is assigned.

2. Cleaning device according to claim 1, characterized in that a toothed belt (33) is provided as the drive element (32).

3. Cleaning device according to claim 1 or 2, characterized in that the drive element (32) is an endless drive element which around two beyond the reversal points of the movement stroke of the wiper strip unit (10) stationary wheels or the like. (42, 43) is looped, one of which can be driven by the drive motor (45).

4. Cleaning device according to one of claims 1 to 3, characterized in that the driver (19) with a housing (12) of the wiper strip unit (10) is connected, in which a wiper strip (14) is attached, which is provided with a longitudinal side by a Slit opening (13) of the housing (12) protrudes.

5. Cleaning device according to claim 4, characterized in that the housing (12) with the driver (19) is adjustably connected in its longitudinal direction.

6. Cleaning device according to claim 5, characterized in that the housing (12) with the driver (19) via a pin-slot arrangement (52,51) is connected.

7. _R cleaning device according to any one of claims 4 to 6, characterized in that the wiper strip (14) in the housing (12) to the surface to be cleaned (2) back and is accommodated movable back and forth.

8. Cleaning device according to claim 7, characterized in that the wiper strip (14) is resiliently biased towards the slot opening (13) of the housing (12).

9. Cleaning device according to claim 7 or 8, characterized in that the wiper strip (14) is connected to a cam follower projecting through an opening laterally from the housing (12), to which at least one control cam is assigned, which is in the area of one opposite the plane of the surface (2) to be cleaned projecting horizontally projecting facade part, such as a connecting profile between glass panes, the wiper strip (14) being able to be moved back in the housing (12) when the projecting facade part is passed over by the cam follower moved via the control cam.

10. Cleaning device according to claim 9, characterized in that the cam follower is formed with a freely rotatably mounted roller.

11. Cleaning device according to claim 9 or 10, characterized in that the control cam is mounted on the guide rail unit (6).

12. Cleaning device according to one of claims 1 to 11, characterized in that the driver (19) is formed with a plurality of firmly connected clamping parts (36, 37), between which the drive element (32) is fixed.

13. Cleaning device according to claim 12, characterized in that the driver (19) is formed with two clamping parts (36, 37).

14. Cleaning device according to claim 12 or 13, characterized in that one of the clamping parts (37) has a toothed rail part (19 ') fixedly arranged on it, which with the as Drive element (32) provided toothed belt (33) is engaged.

15. Cleaning device according to one of claims 1 to 14, characterized in that the guide rail unit (6) is formed by interconnected, a plurality of channels (20, 28) defining profiles (21, 26), wherein in one channel (20) the through a longitudinal slot is guided by the driver (19) projecting outwards.

16. Cleaning device according to one of claims 1 to 15, characterized in that the guide rail unit (6) has a base profile (21) set up for attachment to the facade and an associated cover profile (26) which is closed by a cover strip (30) Contains receiving channel (28) for the cleaning liquid line (29).

17. Cleaning device according to one of claims 1 to 16, characterized in that the spray nozzles (31) are stationary on the guide rail unit (6).

18. Cleaning device according to claim 17, characterized in that the spray nozzles (31) are attached to the cover strip (30) and are connected through this cover strip (30) to the cleaning liquid line (29).

19. Cleaning device according to claim 14 or 15, characterized in that the spray nozzles (31) along the guide rail unit (6) have varying nozzle cross sections and / or varying mutual distances.

20. Cleaning device according to one of claims 15 to 19, characterized in that the base profile (21) with at least one L-shaped cross-section projection (22) has a guide channel (40) for the returning run (39) of the endless drive element (32) defined.

21. Cleaning device according to one of claims 15 to 20, characterized in that the base profile (21) on the rear side facing away from the cover profile (26) receiving channels (23) for Has seals (24).