Vibrating plate

Abstract

The invention relates to a vibrating plate ( 1 ), with a baseplate ( 2 ), set in vibration by means of a driving device ( 9 ), with at least one bottom plate ( 3 ), an upper plate ( 4 ) and a cell structure ( 5 ), arranged between the bottom plate ( 3 ) and the upper plate ( 4 ) to reinforce the base plate ( 2 ), as support components. According to the invention, the support components form a baseplate ( 2 ) with a natural resonance frequency 2 to 5 times, preferably 3 to 4 times the frequency of the vibration thereof. The support components ( 3, 4, 5, 8 ) are thus welded together to form a self-supporting body, such as to give a particularly stiff and light baseplate ( 2 ). As a result of the above properties, said vibrating plate ( 1 ) is particularly suitable for compacting uniform sands and snow, for example in the preparation of ski pistes.

1 . A vibration plate, having a baseplate, which may be set into vibration by an exciter device, having at least one ground plate, a top plate, and a cell structure, which is positioned between the ground plate and the top plate and stiffens the baseplate, as supporting components, wherein the supporting components form a baseplate having a stiffness in which the lowest natural frequency of the baseplate is at least 2 to 5 times, preferably at least 3 to 4 times the frequency of its vibration.  
   
   
       2 . The vibration plate according to  claim 1 , wherein the supporting components are welded to one another to form a self-supporting body.  
   
   
       3 . The vibration plate according to  claim 1 , wherein the vibration plate has a surface pressure because of its intrinsic weight between 0.1 N/cm 2  and 3 N/cm 2 .  
   
   
       4 . The vibration plate according to  claim 1  wherein the vibration of the baseplate may be set as desired at a frequency between 30 Hz and 60 Hz.  
   
   
       5 . The vibration plate according to  claim 1  wherein the vibration of the baseplate may be set as desired at an amplitude of more than 0.1 mm and less than 10 mm, preferably 5 mm.  
   
   
       6 . The vibration plate according to  claim 1  wherein the baseplate has at least one longitudinal girder welded to the cell structure as a further supporting component, which extends parallel to and over a significant part of a long side of the baseplate.  
   
   
       7 . The vibration plate according to  claim 1  wherein the longitudinal girder is positioned below the exciter device.  
   
   
       8 . The vibration plate according to  claim 1  wherein the longitudinal girder is implemented as a frame lying on the ground plate.  
   
   
       9 . The vibration plate according to  claim 1  wherein the individual cells of the cell structure each have a base, whose maximum lateral extension is 20 mm to 200 mm, preferably 56 mm to 162 mm.  
   
   
       10 . The vibration plate according to  claim 1  wherein the cell structure has cells having at least partially round bases.  
   
   
       11 . The vibration plate according to  claim 1  wherein the cell structure has at least partially differing cell shapes.  
   
   
       12 . The vibration plate according to  claim 1  wherein the cell structure has closed cell side walls.  
   
   
       13 . The vibration plate according to  claim 1  wherein planes of the cells parallel to the base each have the same shape and area as the base.  
   
   
       14 . The vibration plate according to  claim 1  wherein the cell structure is open on top.  
   
   
       15 . The vibration plate according to  claim 1  wherein the cell structure is partially closed on top by the top plate.  
   
   
       16 . The vibration plate according to  claim 1  wherein a profiled strip is attached externally to the ground plate.  
   
   
       17 . The vibration plate according to  claim 1  wherein the vibration plate has a vibration-insulated suspension for installation on a self-propelled support device, which is connected to one of the supporting components of the baseplate.  
   
   
       18 . The vibration plate according to  claim 1  wherein the exciter device is attached to at least one of the supporting components of the baseplate.  
   
   
       19 . The vibration plate according to  claim 1  wherein the exciter device may be coupled to a drive of the self-propelled support device and driven thereby.  
   
   
       20 . The vibration plate according to  claim 1  wherein the baseplate has an operating width essentially corresponding to its long side, which is at least approximately as wide as the self-propelled support device, particularly wider than the lane of the support device.  
   
   
       21 . The vibration plate according to to  claim 1  wherein the baseplate has a cross-section, in which the region of the ground plate lying forward in operating direction is curved upward together with a forward region of the top plate.  
   
   
       22 . The vibration plate according to  claim 1  wherein the baseplate has a cross-section in which the region of the top plate lying to the rear in the operating direction is slanted falling downward toward the ground plate.  
   
   
       23 . (canceled)