Polishing brush

Abstract

A polishing brush ( 1 ) includes grinding element bundles ( 22 ) each including wire-shaped grinding elements ( 21 ) formed of an assembly of inorganic filaments impregnated and solidified with resin, and a grinding element holder ( 23 ) that holds the grinding element bundles ( 22 ). The grinding element holder ( 23 ) has an annular grinding element holding groove ( 28 ), and an adhesive ( 29 ) is filled in the grinding element holding groove ( 28 ). Respective base end portions ( 22 a ) of the grinding element bundles ( 22 ) are inserted in the grinding element holding groove ( 28 ) in such a state as to be kept apart from each other and are fixed to the grinding element holder ( 23 ) with the adhesive ( 29 ). Even when the diameter size or the like of each grinding element bundle ( 22 ) is larger than the width of the groove, the grinding element bundles ( 22 ) are deformed to conform to the groove, thereby being inserted into the groove.

1 . A polishing brush comprising:
 a plurality of wire-shaped grinding elements; and   a grinding element holder holding the wire-shaped grinding elements, wherein   the grinding element holder has a groove, and   first end portions of the wire-shaped grinding elements are inserted in the groove and fixed to the grinding element holder with an adhesive filling the groove.   
     
     
         2 . The polishing brush according to  claim 1 , wherein
 the wire-shaped grinding elements are subdivided to form a plurality of grinding element bundles, and the grinding element bundles are fixed to the grinding element holder in such a state as to be kept apart from each other.   
     
     
         3 . The polishing brush according to  claim 2 , wherein
 the groove is an annular groove formed around the axis of center of rotation, and   the grinding element bundles are inserted at regular intervals in the annular groove.   
     
     
         4 . The polishing brush according to  claim 2 , wherein each of the grinding element bundles has a circular shape in cross section in a direction orthogonal to a length direction of each of the wire-shaped grinding elements at an end portion of the grinding element bundle inserted in the groove. 
     
     
         5 . The polishing brush according to  claim 1 , wherein each of the wire-shaped grinding elements is formed of an assembly of inorganic filaments impregnated and solidified with resin.