Buckle Folding Machine

Abstract

A buckle folding machine with a plurality of parallel working rollers that are mounted together in a support that is rotationally mounted in the machine frame and that, via a drive, can be rotated for drawing in, folding, and ejecting the article to be folded, at least one of the rotating working rollers being displaceable, characterized in that the displaceable working roller as buckling roller ( 11 ) is a component of a radially movable buckling body ( 1 ) that can be tilted about a longitudinal axis that runs parallel to the working rollers ( 15, 16, and 17 ), the buckling body ( 1 ) cooperating with the adjacent working rollers ( 15, 16, and 17 ) for buckling the article ( 18 ) to be folded and for feeding it. to a folding gap and using at least one segment of a spreading cam ( 34 ) can be forcibly displaced into a position for permitting passage and into a position for buckling the article ( 18 ) to be folded.

1 . A buckle folding machine with a plurality of parallel working rollers that are mounted together in a support that is rotationally mounted in the machine frame and that, via a drive, can be rotated for drawing in, folding, and ejecting the article to be folded, at least one of the rotating working rollers being displaceable wherein the displaceable working roller serving as buckling roller is a component of a radially movable buckling body that can be tilted about a longitudinal axis that runs parallel to the working rollers, the buckling body cooperating with the adjacent working rollers for buckling the article to be folded and for feeding it to a folding gap and using at least one segment of a spreading cam can be forcibly displaced into a position for permitting passage and into a position for buckling the article to be folded. 
   
   
       2 . The buckle folding machine in accordance with  claim 1  wherein the buckling body includes a mount and a buckling roller mounted rotatable therein, the mount covering the buckling roller along its longitudinal axis on at least one side. 
   
   
       3 . The buckle folding machine in accordance with  claim 2  wherein the mount of the radially displaceable buckling body can be displaced between the working rollers with one side that covers the buckling roller during the buckling process in order to feed the article to be folded to a folding gap. 
   
   
       4 . The buckle folding machine in accordance with  claim 2  wherein the mount of the buckling body is mounted via at least two compression springs relative to the support such that the buckling body can be largely radially displaced against the spring force. 
   
   
       5 . The buckle folding machine in accordance with  claim 2  wherein the mount of the buckling body is provided with cylindrical bearing pins situated on both ends and on which control rollers are seated, the control rollers displacing the buckling body largely radially and against the force of the compression springs by rolling over a spreading cam that is mounted in the machine frame. 
   
   
       6 . The buckle folding machine in accordance with  claim 5  wherein the bearing axle of the buckling roller is positioned offset from the bearing axle of the support and to the bearing axle of the control rollers, so that the buckling body can be tilted about the bearing axle of the support and so that also there is a press-fit connection between the buckling roller and a second working roller during the buckling process even for different thicknesses of articles to be folded. 
   
   
       7 . The buckle folding machine in accordance with  claim 1  wherein adjacent the buckling body is a guide bar. that runs with the support and that partially covers the adjacent working roller and that together with the buckling body forms a feed shaft for the article to be folded. 
   
   
       8 . The buckle folding machine in accordance with  1  wherein a pair of feed rollers is provided that together with adjacent working rollers feeds the article to be folded into the machine in a known manner and makes the first fold in the article to be folded, the bearing axles of the pair of feed rollers being guided along the end disks of the support that are formed as a control cam. 
   
   
       9 . The buckle folding machine in accordance with  claim 8  wherein the feed rollers are connected to one another via rocker elements, the rocker elements carrying a blocking surface that is arranged to prevent the article to be folded from breaking out when the first buckling loop is formed between the feed rollers.