Abstract:
A device for removing dirt adhering to the tire ( 2 ) of a roller used for compacting soil and for spraying the tire ( 2 ) with water. The scraping unit ( 5, 6 ) and a nozzle system ( 10, 11, 12 ) are joined into one modular component and the scraper ( 6 ) forms a cavity ( 10 ) that is sealed off from a scraper support ( 5 ). A water supply pipe ( 11 ) leads into the cavity ( 10 ) from which nozzles ( 12 ) branch off through the wall of the scraper support ( 5 ).

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This application claims priority from PCT/EP97/06597, filed Nov. 26 1997. 
     The invention relates to a device for cleaning the tire of a soil tamping roller of adhering dirt and for spraying the tire with water, this device being provided in a known way with a stripping device which extends essentially perpendicularly to the direction of rotation of the tire over the tire region to be cleaned and which is fastened to a tire carrier in a fixed position in relation to the tire, with a nozzle arrangement which is fastened to the tire carrier in a fixed position in relation to the tire, and with nozzles, arranged at a distance from one another and approximately parallel to the stripping device, for spraying water onto the tire behind the stripper in the tire running direction. 
     2. Description of the Related Art 
     In the known devices of this type, the stripping device and the nozzle arrangement are provided as components which are separate from one another and which each have to be fastened independently to the tire carrier. 
     OBJECT AND SUMMARY OF THE INVENTION 
     The object of this invention is to provide a device for cleaning dirt and spraying a tire of a soil tamping rollers, which, as regards both its design and its mounting on the tire carrier, is improved, as compared with the known devices, in such a way that it requires a lower outlay in terms of manufacture and assembly. 
     According to the invention, the above object is achieved in that the stripping device and the nozzle arrangement are combined to form a structural unit and the latter is formed from a trough-like stripper holder, which extends continuously over the width of the tire region to the cleaned, and from a stripper, which is arranged in a stripper holder and which projects toward the tire from the stripper holder over the length of the latter, there being formed in the stripper a cavity which is sealed off relative to the stripper holder and extends over a substantial part of the length of the latter and into which a water inflow line opens and from which the nozzles branch off through the wall of the stripper holder. 
     The device according to the invention consists of only a few components which are each independently shaped in a simple way and which can easily be connected to one another to form the desired structural unit, and said device can also be mounted on a tire carrier in a very simple way because all its parts are combined to form a single structural unit. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The invention is explained in more detail below by means of an exemplary embodiment with reference to the drawing in which: 
     FIG. 1 shows the device mounted on the tire carrier and resting with its stripper against the tire, in side view as seen parallel to the tire axis, 
     FIG. 2 shows the device in a front view, as seen from the left by the observer of FIG. 1, the connection piece between the device and the tire carrier not being illustrated for the sake of greater clarity, and 
     FIG. 3 shows a cross section through a device in a section along the sectional line III—III in FIG.  2 . 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The device  1  illustrated in the drawing serves for cleaning a tire  2  of a soil tamping roller, the tire being indicated merely diagrammatically in FIG. 1, of adhering dirt and for spraying the tire  2  with water. 
     The device  1  is fastened, in the oblique position in relation to the tire  2  evident from FIG. 1, to the tire carrier  4 , likewise indicated merely diagrammatically in FIG. 1, by means of a connection element  3  which is not illustrated in FIG.  2  and FIG. 3 for the sake of clarity. 
     The device  1  has a stripping device and a nozzle arrangement which are combined to form a structural unit. This structural unit consists of a trough-like stripper holder  5 , and a stripper  6 . The stripper  6  is formed from two parts  5   a  and  5   b  and which extend continuously over the width of that region of the tire  2  to be cleaned. The stripper  6  is made of elastic plastic, is arranged in the stripper holder  5 , and has wide sides  6   a ,  6   b  parallel to one another and, with its end regions located on its end faces and on the left and right for the observer of FIG. 2, fills the cross section of the stripper holder  5  in an essentially liquid-tight manner. The material of the stripper is preferably polyurethane. 
     As already mentioned, the stripper holder  5  consists of two parts  5   a  and  5   b  which can be closed together by means of screw bolts  7   a  and nuts  7   b , extend in each case over the length of the stripper  6  and between them form a trough  9  for receiving the stripper  6  in a sealed-off manner. The trough  9  has an essentially rectangular U-shaped cross section. 
     As may best be seen from FIG. 2, the stripper  6  forms a cavity  10  which is sealed off relative to the stripper holder  5  and extends over a substantial part of the length of the stripper holder  5 . A water inflow line  11  branches off into the cavity  10  through the wall of the stripper holder part  5   a , and nozzles  12  branch off from the cavity  10  through the wall of the stripper holder part  5   b . The edge of the stripper  6  that is positioned adjacent the tire  2  extends essentially perpendicularly to the direction of rotation of the tire  2  and essentially parallel to the surface of the tire  2  over the region to be cleaned. Nozzles  12 , arranged at a distance from one another and approximately parallel to the stripper  6 , are arranged in such a way that the water emerging from them passes onto the tire  2  behind the stripper  6  in the tire running direction. 
     The two parts  5   a ,  5   b  forming the stripper holder are each have bent at right angles to the other parts  5   a ,  5   b  along their longitudinal edges which are located at the top in the position of use. A bent leg  5   c  of the part  5   a  faces the stripper  6  and has a width corresponding essentially to the thickness of the stripper  6 . The two parts  5   a ,  5   b  of the stripper holder are reinforced by the legs  5   c . Part  5   a is also at the lower end, by a further angled wall part  5   d , so that the stripper  6  is retained securely in the desired oblique position relative to the tire  2 , as is evident from FIG.  1 . 
     As is clear from FIG.  2  and FIG. 3, the part  5   b  located on the right for the observer of FIG.  3  and at the rear for the observer of FIG. 2 terminates, at its lower end facing the tire  2 , in tines  5   e . Tines  5   e  are angled toward the stripper holder part  5   a , and are distributed over the length of the part  5   b , and pass through the passage holes  13  of the stripper  6  and through orifices  14  in the part  5   a  of the stripper holder  5 . The orifices  14  have a smaller cross section than the passage holes. The tines  5   e  retain the stripper  6  immovably in the stripper holder  5  and, at the same time, ensure that the stripper parts  5   a ,  5   b  are in the desired predetermined position in relation to one another. 
     The connection of the two parts  5   a ,  5   b  of the stripper holder  5  under the stripper  6  by means of the screw bolts  7   a  and nuts  7   b  brings about secure releasable bracing of the stripper holder  5  against the stripper  6 , so that no water can flow out of the cavity  10  along the wide sides  6   a , 6 b  between the parts  5   a  and  5   b , on the one hand, and the stripper  6 , on the other hand. 
     As can be seen in FIG. 1, the stripper  6  is set preferably at an acute angle to the tire  2  counter to the running direction  13 . A second device  1  is located, at an opposite set angle, on the other side of the upper vertex of the tire  2  and performs the stripping function there in the opposite running direction of the tire  2 .