Abstract:
The invention relates to a vehicle wash system comprising a first treatment unit ( 2 ) arranged on a frame ( 1 ) so as to be height-adjustable and at least one second treatment unit ( 3 ) arranged on the frame ( 1 ) so as to be height-adjustable. In order to reduce the components required for driving and controlling the treatment units ( 2, 3 ) the latter are coupled to a common drive motor ( 11 ) via a traction mechanism drive ( 12, 13, 14, 15 ) for their mutual adjustment.

Description:
FIELD OF THE INVENTION 
       [0001]    The invention relates to a vehicle wash system comprising a plurality of wash units. 
       BACKGROUND OF THE INVENTION 
       [0002]    As a rule, a vehicle wash system also has, apart from one or more horizontal height-adjustable wash units, such as, for example, roof brushes, additional height-adjustable treatment units in the form of horizontal drying nozzles or the like. Such horizontal treatment units are commonly moved by means of separate hoist drives independent of each other. As a rule, this occurs via a winder drive by means of cable drives or flat belt drives or by means of toothed belt drives with corresponding deflection means and counterweights. In this connection, each of the units, such as roof brushes or horizontal drying nozzles, is equipped with a dedicated hoist motor, that admittedly requires a correspondingly high cost for the drive and control thereof. 
       SUMMARY OF THE INVENTION 
       [0003]    The problem of the invention is to create a vehicle wash system of the aforementioned type that, at a low cost for the control and drive thereof, enables a reliable cleaning and drying of a vehicle. 
         [0004]    This problem is solved by means of a vehicle wash system having the features as set forth in the independent claim(s). Expedient improvements and advantageous embodiments of the invention are the object of the dependent claims. 
         [0005]    An essential advantage of the vehicle wash system according to the invention is that a plurality of treatment units can be moved via a traction mechanism drive by means of a single drive motor. This can reduce the number of drive motors and lower the expenditure for control. In addition, the simplified drive concept enables a cost savings. 
         [0006]    In a particularly expedient embodiment, the traction mechanism drive comprises a traction member and deflection rolls, via which the traction member is guided to one of the treatment units by a drive element set into rotation by the drive motor. Guidance of the traction member designed, for example, as a cable, belt or chain can be configured so that the drive motor is fastened in a stationary manner to the frame, wherein the traction member, starting from the drive motor, is guided first via a deflection roll on one of the treatment units in the manner of a loose roll of a pulley and furthermore deflected a second time via stationary deflection rolls on the frame and subsequently fastened to the second treatment unit. 
         [0007]    In an alternative execution, the drive motor can however also be fastened to one of the two height-adjustable treatment units and the traction member guided from there to the second treatment unit only via stationary deflection rolls on the frame. 
         [0008]    The drive can be designed, for example, as a winder drive, with one end of the traction member being wound on a drive roll set into rotation by the drive motor and the other end of the traction member being connected to the first treatment unit. The drive can also occur, particularly with the use of a chain or toothed belt as the traction member, via one deflection and a positive-fit drive element in the form of a sprocket wheel, belt pulley or the like. 
         [0009]    Allocated to at least one of the treatment units is a locking arrangement, by means of which the respective treatment unit can be arrested in a preset end position, preferably the upper end position. Provided there is a sufficiently large weight difference between the treatment units, the locking arrangement can be provided only for the heavier treatment unit. However, corresponding locking arrangements can be mounted to both treatment units. 
         [0010]    For a portal wash system the frame can be designed, for example, as a movable portal, wherein during cleaning, the wash brushes and drying nozzles, apart from a horizontal shifting, are also moved in the longitudinal direction of the vehicle. In the event of a vehicle wash plant in which a vehicle is moved in the longitudinal direction of the vehicle during cleaning, for example by means of a belt conveyor or chain conveyor, the frame can also be of a stationary execution. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0011]    Additional distinctive features and advantages of the invention arise from the following description of two embodiments with the aid of the drawing. Shown are: 
           [0012]      FIG. 1 , a schematic side view of one part of a vehicle wash system comprising a horizontal wash brush and a horizontal drying arrangement in a first operating position; 
           [0013]      FIG. 2 , a schematic side view of the part of the vehicle wash system from  FIG. 1 , in a second operating position; 
           [0014]      FIG. 3 , a schematic of one part of an additional vehicle wash system comprising a horizontal wash brush and a horizontal drying arrangement in a first operating position and 
           [0015]      FIG. 4 , a schematic side view of the part of the vehicle wash system from  FIG. 3  in a second operating position. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0016]    The vehicle wash system represented schematically in different positions in side view in  FIGS. 1 and 2  comprises a frame  1 , executed here as a portal, on which are arranged in a height-adjustable manner a first treatment unit  2  executed as a horizontal brush and a second treatment unit  3  designed as a drying arrangement. The first treatment unit  2  comprises a wash brush  4  that is rotatable about a horizontal axis and driven by a motor and that is guided to be vertically sliding on the frame  1  by means of vertical guides  5  and guide blocks  6 . For the execution shown, the second treatment unit  3  is realized as a horizontal roof dryer having a housing  7  and a nozzle head  8  directed downward, which run crosswise to the longitudinal direction of the vehicle across the entire vehicle width and which, by means of vertical guides  9  and guide blocks  10  allocated thereto, are likewise guided to be vertically sliding on the frame  1  executed as a portal. After a vehicle has been washed, an air flow produced by a blower and introduced into the housing  7  can be directed to the upper side of the vehicle by means of the nozzle head  8  in order to dry the vehicle. The vehicle wash system comprises, apart from the horizontal brush, side brushes as well and side dryers that, however, are not depicted here. These likewise can be arranged on the portal-like frame  1  or on an additional portal or frame. 
         [0017]    For the embodiment depicted in  FIGS. 1 and 2 , a drive motor  11  is arranged on the frame  1  executed as a portal; said drive motor is coupled to the two treatment units  2  and  3  by means of a traction member  12  executed as a cable, belt or chain and diverse deflection rolls. The traction member  12  is guided by means of a first deflection roll  13  on the second treatment unit  3  and two stationary deflection rolls  14  and  15  on the frame  1 , where one end of the traction member  12  is wound upon a drive roll  16  that rotates by means of the drive motor  11  and the other end of the traction member  12  is fastened to the first treatment unit  2 . 
         [0018]    Additionally fastened to the frame  1  is a locking arrangement  17  by means of which the second treatment unit  3  can be arrested in an upper end position. For the embodiment shown, the locking arrangement  17  comprises a pivoting stop  18  that can be made to pivot, via a lever  20 , by means of a pneumatically or hydraulically activated actuating cylinder or other suitable actuating drive  19 , between a downward-folded release position according to  FIG. 1  and an upward-folded stop position according to  FIG. 2 . In the upward-folded stop position, the stop  18  rests against the underside of the block  10  and prevents lowering of the second treatment unit  3 . Also fastened to the frame  1  is an upper stop  21  for the first treatment unit  2 . 
         [0019]    For the execution shown, there is a weight difference between the two treatment units  2  and  3 , wherein the first treatment unit  2  is lighter than the second treatment unit  3  and the difference in weight is selected such that the first treatment unit  2  is drawn against the stop  21  by the heavier second treatment unit  3  according to  FIG. 1 , provided that the second treatment unit  3  is not arrested. 
         [0020]    If for the position depicted in  FIG. 1  the traction member  12  is rolled up by a corresponding rotation of the drive roll  16 , the second treatment unit  3  is raised and can be moved from a lower position depicted by solid lines to an upper end position depicted by dashed lines. If by activating the locking arrangement  17  the second treatment unit  3  is arrested in the upper end position according to  FIG. 2 , the deflection roll  13  acts as a stationary deflection roll and the first treatment unit  2  can be moved upward or downward by means of a corresponding rotation of the drive roll  16 . 
         [0021]    Provided that the difference in weight of the treatment units is sufficiently great, a locking device is required only on the heavier treatment unit since when activating the drive motor, only the heavier treatment unit will move and the lighter one is drawn against the mechanical end stop. However, for other weight relationships, locking devices can also be provided on both treatment units. 
         [0022]    This drive principle can be used to mutually adjust both treatment units by means of one single drive motor. If the first treatment unit is a matter of, for example, a wash brush and the second treatment unit is a matter of a drying arrangement on one portal, this in no way whatsoever represents a restricting of the operation of the vehicle wash system, since the wash brush and the drying arrangement are effective in any case in separate passes over the portal. 
         [0023]    The second embodiment of a vehicle wash system represented in  FIGS. 3 and 4  differs from the first embodiment only in that the drive motor  11  with drive roll  16 , rather than being in a stationary arrangement on the frame  1 , is arranged on the vertically sliding second treatment unit  3 . Since the basic construction otherwise corresponds to the embodiment of  FIGS. 1 and 2 , corresponding components also are given the same reference numbers. Here, the traction element  12  is guided only via two deflection rolls  14  and  15  in a stationary arrangement on the frame  1 , wherein one end of the traction member  12  is fastened to the first treatment unit  2  and the other end of the traction member  12  is wound upon the drive roll  16  of the drive motor  11  fastened to the second treatment unit  3 . 
         [0024]    If for the position depicted in  FIG. 3 , the drive roll  16  is rotated by the drive motor  11  in order to roll up the traction member  12 , the second treatment unit  3  also is raised here and can be moved from a lower position represented in solid lines to an upper end position represented in dashed lines. If the second treatment unit  3 , by means of activating the locking arrangement  17 , is arrested in the upper end position according to  FIG. 4 , the treatment unit  2  can be lowered and raised afresh by means of a corresponding rotation of the drive roll  16 . 
         [0025]    The invention is not limited to the embodiments described above and represented in the drawings. It thus goes without saying that in lieu of a horizontal wash brush and horizontal drying arrangement, other treatment units can also be moved by means of the aforementioned drive concept.