Device for Grinding Spinning Cots

Abstract

The device has a rotating grinding surface and a receptacle into which a spinning cot to be ground is inserted. The receptacle is advanced in a direction toward the grinding surface until the spinning cot inserted into the receptacle contacts the grinding surface. A size determination device for determining the size of the spinning cot is provided, wherein the size determination device has distance sensors and a computing unit for deriving the size of the spinning cot. The distance sensors operate with measuring beams that have an orientation such that the measuring beams impinge on an outer peripheral surface of the spinning cot inserted into the receptacle on at least three points that are spaced apart from one another in a circumferential direction of the spinning cot.

1 . A device for grinding spinning cots, the device comprising: 
 a rotating grinding surface;    a receptacle into which the spinning cot to be ground is insertable;    means for advancing the receptacle in a direction toward the grinding surface until the spinning cot inserted into the receptacle contacts the grinding surface;    a size determination device for determining a size of the spinning cot inserted into the receptacle, wherein the size determination device comprises distance sensors and a computing unit for deriving the size of the spinning cot based on at least one geometric value acquired by the distance sensors;    wherein the distance sensors operate with measuring beams that have an orientation such that the measuring beams impinge on at least a first point, a second point, and a third point of an outer peripheral surface of the spinning cot inserted into the receptacle, wherein the first, second, and third points are spaced apart from one another in a circumferential direction of the spinning cot.    
   
   
       2 . The device according to  claim 1 , wherein the orientation of the measuring beams is such that all of the measuring beams impinge at a same axial length of the spinning cot on the outer peripheral surface of the spinning cot.  
   
   
       3 . The device according to  claim 1 , wherein the orientation of the measuring beams is such that at least a first one of the measuring beams is directed to the first point that is adjacent to a center axis of the spinning cot and at least a second one of the measuring beams is directed to the second point that is also adjacent to the center axis but on a side facing away from the first one of the measuring beams.  
   
   
       4 . The device according to  claim 3 , wherein the measuring beams are not parallel to one another.  
   
   
       5 . The device according to  claim 1 , further comprising a common holder, wherein the distance sensors are fastened to the common holder.  
   
   
       6 . The device according to  claim 5 , wherein the common holder has positive locking elements on which or in which the distance sensors are mounted.  
   
   
       7 . The device according to  claim 6 , wherein the distance sensors are additionally screwed onto the common holder.  
   
   
       8 . The device according to  claim 6 , wherein the common holder is rigidly connected to the receptacle.  
   
   
       9 . The device according to  claim 1 , wherein the distance sensors are rigidly connected to the receptacle.  
   
   
       10 . The device according to  claim 1 , wherein the distance sensors operate by triangulation.  
   
   
       11 . The device according to  claim 10 , wherein the distance sensors are laser distance sensors.  
   
   
       12 . The device according to  claim 1 , comprising a compressed air device for cleaning the distance sensors and the spinning cot.