Multi-Needle Chain-Stitch Sewing Machine

Abstract

The invention relates to a multi-needle chain-stitch sewing machine, for the production of mattress sheets, made from a sewed material, comprising several, in particular at least three sewed material layers, preferably with one sewed material layer made from an elastic material, for example sponge, and a cover layer with a sewing pattern, by means of a sewing machine and a supply device for the sewed material layers to be sewn. According to the invention, a multi-needle chain-stitch sewing machine may be further developed which avoids the problems of conventional solutions with which, in particular, a simple and economical feed of the sewed material layers to the sewing machine is possible without spoiling the sewing product, for example, by introduction of folds, whereby at least one feed device ( 5 ) is arranged between the supply device ( 3 ) and the sewing machine ( 2 ), along the entire feed length, lying on the material for sewing, which draws at least two sewed material layers from the supply device ( 13 ) and feeds the same into the sewing machine ( 2 ).

1 . Multi-needle chain-stitch sewing machine for the production of mattress sheets, made from a sewing material, comprising several, in particular at least three sewing material layers, preferably with one sewing material layer made from an elastic material, for example foamed material, and a cover layer with a sewing pattern, with a sewing unit and a supply device for the sewing material layers to be sewn, 
     characterized in 
     that between said supply device ( 3 ) and said sewing unit ( 2 ) at least one feed device ( 5 ) is arranged which rests against the sewing material over the whole feed length between the supply device ( 3 ) and the sewing unit ( 2 ), said feed device withdrawing at least two sewing material layers from the supply device ( 3 ) and feeding the same up and into the sewing unit ( 2 ). 
   
   
       2 . Multi-needle chain-stitch sewing machine according to  claim 1 , 
     characterized in 
     that the feed device ( 5 ) is formed as a conveyor belt ( 10 ) which rests on the surface of the sewing material layer ( 17 ) made from an elastic material which faces the cover sheet ( 19 ) of the sewing material. 
   
   
       3 . Multi-needle chain-stitch sewing machine according to  claim 1 , 
     characterized in 
     that the feed device ( 5 ) consists of two conveyor belts ( 10 ,  16 ) which are arranged oppositely and parallel to each other and between which the sewing material is conveyable. 
   
   
       4 . Multi-needle chain-stitch sewing machine according to  claim 1 , 
     characterized in 
     that the sewing material is movable in relation to the sewing unit ( 2 ) in a direction transversely with respect to the conveying direction of the sewing material. 
   
   
       5 . Multi-needle chain-stitch sewing machine according to  claim 1 , 
     characterized in 
     that the supply device ( 3 ) includes a continuous feed device, by means of which the sewing material layers, in particular at least the lowermost sewing material layer and the sewing material layer ( 17 ) made from an elastic material are conveyable in the direction of the sewing unit ( 2 ). 
   
   
       6 . Multi-needle chain-stitch sewing machine according to  claim 5 , 
     characterized in 
     that the feed device is formed as a conveyor belt ( 22 ), by means of which the sewing material layers are conveyable in the direction of the sewing unit ( 2 ). 
   
   
       7 . Multi-needle chain-stitch sewing machine according to  claim 6 , 
     characterized in 
     that the conveyor belt ( 22 ) is arranged in a frame ( 24 ) which is arranged for displacement in a direction extending at right angles to the conveying direction of the sewing material layers ( 17 ). 
   
   
       8 . Multi-needle chain-stitch sewing machine according to  claim 7 , 
     characterized in 
     that the displacement of the frame ( 24 ) is synchronized with the displacement of the sewing material in the feed device ( 5 ) in relation to the sewing unit ( 2 ). 
   
   
       9 . Multi-needle chain-stitch sewing machine according to  claim 6 , 
     characterized in 
     that the conveyor belt ( 22 ) of the supply device ( 3 ) is extended up to the conveyor belt ( 10 ), by means of which the sewing material may be fed to the sewing unit ( 2 ). 
   
   
       10 . Multi-needle chain-stitch sewing machine according to  claim 5 , 
     characterized in 
     that the sewing material layers may be placed on the feed device ( 5 ) in the form of lap rolls ( 4 ) in such a manner that the sewing material layers are taken up by the conveyor device and conveyed to the sewing unit. 
   
   
       11 . Multi-needle chain-stitch sewing machine according to  claim 10 , 
     characterized in 
     that the lap rolls ( 4 ) are supported in brackets in a manner to be fixed against any translational movement in the conveying direction of the conveyor device. 
   
   
       12 . Multi-needle chain-stitch sewing machine according to  claim 6 , 
     characterized in 
     that the sewing material layers may be laid on in the form of lap rolls ( 4 ), with said lap rolls ( 4 ) being supported in brackets in a manner fixed against any translational movement in the conveying direction of the conveyor belt ( 22 ). 
   
   
       13 . Multi-needle chain-stitch sewing machine according to  claim 5 , 
     characterized in 
     that the feed device of the supply device ( 3 ) is extended up and into the zone of a conveyor device ( 10 ), by means of which the sewing material may be fed to the sewing unit ( 2 ). 
   
   
       14 . Multi-needle chain-stitch sewing machine according to  claim 13 , 
     characterized in 
     that the transport and handling device ( 28 ) consists of a stand ( 30 ) having arranged therein one cross member ( 35 ) for each lap roll ( 4 ), said cross members each including a lifting device ( 34 ) for lifting and lowering a lap roll ( 4 ). 
   
   
       15 . Multi-needle chain-stitch sewing machine according to  claim 14 , 
     characterized in 
     that said cross members ( 35 ) are aligned transversely with respect to the conveying direction of the supply device ( 3 ) and are preferably supported for displacement in relation to the stand ( 30 ). 
   
   
       16 . Multi-needle chain-stitch sewing machine according to  claim 14 , 
     characterized in 
     that the lifting device ( 34 ) consists of a U-shaped gripper ( 39 ) with two legs ( 36 ) arranged on a web, which legs comprise hook members for receiving a shaft ( 38 ).