Apparatus for the manufacture of leno cloths

Abstract

An apparatus for the manufacture of leno cloths in a weaving machine comprises a needle bar for the guidance of ground threads as well as guide means for leno threads. The guide means for the leno threads are horizontally movably mounted in order to laterally deflect the leno threads. In addition, the needle bar for the ground threads and the guide means for the leno threads are vertically movably mounted and are operatively connected to a dobby in order to be able to deflect the ground threads and the leno threads in the vertical direction, with at least the vertical deflection of the needle bar for the ground threads taking place via two heald drive bars which start from the dobby.

1 . Apparatus for the manufacture of leno cloths in a weaving machine, said weaving machine comprising a dobby as well as a reed ( 2 ,  2 ′) for the beating up of weft threads ( 19 ), and said apparatus ( 1 ) comprising a needle bar ( 7 ,  7 ′) for the guiding of ground threads ( 4 ,  4 ′) as well as guide means ( 8 ,  8 ′) for leno threads ( 3 ,  3 ′), said guide means for the leno threads being horizontally movably mounted in order to be able to laterally deflect the leno threads ( 3 ,  3 ′), said needle bar and said guide means for the leno threads being arranged ahead of the reed ( 2 ,  2 ′), and said needle bar and/or said guide means for the leno threads being vertically movably mounted and being operatively connected to the dobby in order to be able to deflect the ground threads ( 4 ,  4 ′) or the leno threads ( 3 ,  3 ′) respectively in the vertical direction, characterized in that 
 at least one of the operative connections between the needle bar ( 7 ,  7 ′) and the dobby and/or between the guide means ( 8 ,  8 ′) for the leno threads and the dobby respectively comprise a plurality of heald drives (drive bars) ( 13 . 1 ,  13 . 2 ) which start from the dobby.  
 
     
     
         2 . Apparatus in accordance with  claim 1 , with the heald drive bars ( 11 ,  13 . 1 ,  13 . 2 ) comprising vertically acting drive elements ( 10 ,  10 . 1 ,  10 . 2 ,  16 ,  16 . 1 ,  16 . 2 ) which are arranged distributed over the length of the needle bar for the ground threads ( 7 ,  7 ′) and/or the guide means ( 8 ,  8 ′) for the leno threads, and with the needle bar and/or the guide means for the leno threads respectively being operatively connected to the vertically acting drive elements via elastic coupling elements.  
     
     
         3 . Apparatus in accordance with  claim 1  or  claim 2 , with the needle bar for the ground threads ( 7 ,  7 ′) and/or the guide means ( 8 ,  8 ′) for the leno threads each being arranged on a frame structure ( 6 ,  9 ) which is provided with vertical struts ( 6   a ,  9   a ) which are arranged distributed over the length of the needle bar and/or of the guide means for the leno threads respectively.  
     
     
         4 . Apparatus in accordance with any one of the  claims 1  to  3 , comprising a frame ( 6 ) which is designed in box shape, on which the needle bar for the ground threads ( 7 ,  7 ′) is arranged together with a deflection element ( 5 ) for the ground threads, which is mounted so as to be vertically movable and which is actively connected to the dobby via at least two of the heald drive bars ( 13 . 1 ,  13 . 2 ) which depart from the dobby.  
     
     
         5 . Apparatus in accordance with  claim 4 , with the at least two heald drive bars ( 13 . 1 ,  13 . 2 ) being arranged spaced apart in the longitudinal direction of the ground and leno threads ( 4 ,  4 ′,  3 ,  3 ′).  
     
     
         6 . Apparatus in accordance with any one of the claims  4  or  5 , with the box shaped frame ( 6 ) being stiffened in the transverse direction by bridge-like elements ( 6   a ) and/or struts which are arranged distributed over the length of the frame ( 6 ).  
     
     
         7 . Apparatus in accordance with any one of the  claims 1  to  6 , comprising a plurality of rotatably mounted support levers ( 20 ) which are arranged distributed over the length of the needle bar for the ground threads ( 7 ,  7 ′) and to which the needle bar is connected, the support levers having a common axis of rotation which is arranged displaced from the needle bar in the longitudinal direction of the ground and leno threads ( 4 ,  4 ′,  3 ,  3 ′).  
     
     
         8 . Apparatus in accordance with any one of the  claims 1  to  6 , comprising a plurality of four-bar linkages which are arranged distributed over the length of the needle bar for the ground threads ( 7 ,  7 ′) and which each have two sides ( 21 . 3 ,  21 . 4 ) which extend substantially vertically, of which one side ( 21 . 3 ) is arranged firmly in the weaving machine and one is movable, with the movable side ( 21 . 4 ) being connected at the one end to the needle bar for the ground threads and at the other end to the vertically acting drive elements ( 16 . 1 ,  16 . 2 ).  
     
     
         9  Apparatus in accordance with any one of the  claims 1  to  8 , with the guide means ( 8 ,  8 ′) for the leno threads being actively connected to the dobby via a further heald drive bar ( 12 ) in order to be able to deflect the guide means ( 8 ,  8 ′) for the leno threads in the horizontal direction.  
     
     
         10 . Weaving machine comprising an apparatus ( 1 ) in accordance with any one of the  claims 1  to  9  for the manufacture of leno cloths.