Thread gripper for a rapier of a rapier loom

Abstract

The invention relates to a yarn clamp ( 13 ) for a gripper of a rapier weaving machine and comprises two clamp elements for clamping a filling yarn ( 2 ). Each clamp element is fitted with one clamping segment ( 20, 25 ) and the segments are located opposite each other. The clamping segment ( 20 ) of at least one of the clamp elements is adjustable by means of an adjustment device ( 30 ) relative to the other clamping segment ( 25 ) and relative to the main body ( 18 ) of the one clamping segment.

1 . A yarn clamp ( 13 ) for a gripper ( 1 ) of a rapier weaving machine having two clamp elements for clamping a filling yarn, each clamp element comprising a clamping segment ( 20 ,  25 ) whereby the clamping segments are disposed opposite each other, characterized in that 
 the clamping segment ( 20 ,  25 )of at least one of the clamp elements is adjustable relative to the clamping segment ( 25 ,  20 ) of the other clamp element and relative to its main body ( 18 ,  54 ,  59 ).    
     
     
         2 . Yarn clamp as claimed in  claim 1 , characterized in that a joint ( 37 ,  47 ) which is elastically bendable by means of an adjustment device ( 30 ,  31 ) is provided between the main body ( 18 ,  54 ,  59 ) of the clamp element and the adjustable clamping segment ( 20 ,  25 ).  
     
     
         3 . Yarn clamp as claimed in either of claims  1  and  2 , characterized in that the clamping segment ( 20 ) is mounted using a retention device ( 36 ) on the main body ( 54 ) and in that a bendable joint ( 37 ) is provided between the clamping segment( 20 ) and the retention device ( 36 ).  
     
     
         4 . Yarn clamp as claimed in either of claims  2  and  3 , characterized in that the adjustment device ( 30 ,  31 ) includes an adjusting screw ( 39 ,  49 ) mounted in the area of the joint ( 37 ,  47 ).  
     
     
         5 . Yarn clamp as claimed in one of claims  1  through  4 , characterized in that one clamp element is mounted in fixed manner and the other clamp element ( 24 ) is mounted so as to be relatively moveable with respect to it, and in that the fixed clamp element is fitted with the adjustable clamping segment ( 20 ).  
     
     
         6 . Yarn clamp as claimed in  claim 5 , characterized in that it comprises one fixed clamp element and one clamp element that is moveable relative thereto and in that the moveable clamp element ( 24 ) is a leaf spring constituting a clamping segment ( 25 ), the end ( 26 ) of said leaf spring located away from the clamping segment ( 25 ) being secured to an extension ( 27 ,  46 ) of the main body ( 18 ,  54 ) of the other clamp element.  
     
     
         7 . Yarn clamp as claimed in  claim 6 , characterized in that the position of the extension ( 46 ) of the main body ( 54 ) relative to the main body ( 54 ) is adjustable.  
     
     
         8 . Yarn clamp as claimed in one of claims  1  through  7 , characterized in that the moveable clamp element includes a pivotably supported lever ( 57 ,  59 ) which is fitted with a clamping segment ( 20 ) that is adjustable relative to one arm ( 59 ) of the lever.  
     
     
         9 . Yarn clamp as claimed in one of claims  1  through  8 , characterized in that at least one adjustment device ( 30 ,  31 ) is fitted with means ( 70 ,  75 ,  78 ) to limit the adjustment excursion.  
     
     
         10 . Yarn clamp as claimed in one of claims  1  through  9 , characterized in that one of the clamping segments ( 20 ) is fitted with a rib running along its longitudinal direction and which cooperates with a longitudinal groove ( 29 ) in the opposed clamping segment ( 25 ).