Patent Publication Number: US-4319469-A

Title: Pattern mechanism for a warp knitting machine

Description:
This invention relates to a pattern mechanism for a warp knitting machine. More particularly, this invention relates to a pattern mechanism for shogging guide bars of a warp knitting machine. 
     As is known, warp knitting machines have been constructed with various types of guide bars which are shogged from time-to-time in accordance with a programmed pattern via a pattern mechanism. One known pattern mechanism, such as described in U.S. Pat. No. 4,139,997, which is of the &#34;additive&#34; type, has employed final control elements in the form of eccentrics which are driven by a suitable drive to shog the guide bars via tension elements. Usually, each pattern mechanism is associated with one guide bar. Thus, if there are a multiplicity of guide bars or belts, the pattern mechanisms take up considerable space. Further, the drive for the individual final control elements is very complicated and access to the final control elements is very restricted. Thus, it has been difficult and time-consuming to adjust the individual final control elements for each guide bar. 
     Accordingly, it is an object of the invention to simplify the mounting of a drive for the final control elements of a pattern mechanism of the additive type in a warp knitting machine. 
     It is another object of the invention to make the final control elements of a pattern mechanism of a warp knitting machine accessible for adjustment. 
     Briefly, the invention provides a pattern mechanism for at least a pair of guide bars of a warp knitting machine which is comprised of a pair of tension elements, an elongated carrier member, rows of final control elements and a common drive. 
     The tension elements are each secured at one end to a respective guide bar while the carrier member extends between the two tension elements and is releasable from the drive. 
     The control elements are mounted on and along opposite sides of the carrier member to define pairs of interconnected control elements while the common drive includes a drive shaft connected to at least two pairs of interconnected control elements. 
     With this construction, the number of drive shafts for a plurality of final control elements is reduced. Since the carrier member is releasable from the drive shaft, the carrier member can easily be taken out and tensioned on a suitably-constructed assembly or adjusting frame on which the final control elements are freely accessible and can be adjusted. 
    
    
     These and other objects and advantages of the invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings in which: 
     FIG. 1 illustrates a view of a pattern mechanism according to the invention; and 
     FIG. 2 illustrates a view of the pattern mechanism taken in the direction indicated by the arrow A in FIG. 1. 
    
    
     Referring to FIG. 1, a warp knitting machine includes a plurality of guide bars 1 which are driven in a shogging direction from time-to-time. As indicated, pairs of guide bars are driven via a simple pattern mechanism off a common drive. 
     Each pattern mechanism includes a pair of tension elements 2, each of which is secured at one end to a respective guide bar 1 and which is guided over a guide pulley 3 and secured at the opposite end to an abutment 6. Each pattern mechanism also includes an elongated carrier member 7 of channel shape which extends between and along the tension elements 2 in parallel relation. This carrier member 7 has the abutments 6 mounted near one end in a suitable manner to anchor the tension elements 2. 
     A pair of rows of final control elements 4a, 4b, constructed as eccentrics, as is known, are mounted on and along opposite sides of the carrier member 7 with each pair being interconnected via a stub shaft rotatably mounted in the walls of the carrier member 7. These control elements 4a, 4b alternate with rollers 5 which are also mounted on and along the carrier member 7 to engage and adjustably deflect a respective tension element in known manner. The control elements 4a, 4b also have dog clutches (not shown) for example, as described in German O.S. 27 41 200. 
     A plurality of gears 8 are also disposed in the pattern mechanism to connect the control element pairs to a common drive. As shown, a gear 8 (i.e., toothed wheel) is mounted on each stub shaft interconnecting two control elements 4a, 4b between the legs of the carrier member 7 while a gear 8 is located between and meshes with two gears 8 of the interconnected pairs of control elements 4a, 4b. The gears 8 and control elements 4a, 4b are interconnected to form two sets of control elements on the carrier member 7. 
     The drive as constructed includes a pair of drive shafts 10, each of which carries a multiplicity of gears 9, only one of which is shown. Each gear 9 of a shaft 10 meshes with a central gear 8 of a control element set of a given pattern mechanism in order to impart a driving force to the control elements 4a, 4b of the set simultaneously relative to the tension elements 2. 
     The carrier member 7 is mounted to be removed upwards or sideways, depending upon the position of the member, from the gears 9 on the shafts 10 and mounted separately in an adjusting frame. When in the adjusting frame, the final control elements 4a, 4b are freely accessible and can be adjusted. 
     The invention thus provides a pattern mechanism in which the final control elements can be made readily accessible for adjustment in a relatively simple manner.