Swiveling roll bar

Abstract

The invention relates to a swivelable roll bar, in particular for construction vehicles, with two vertical carriers, each of which has a pair of spars, whereby in each, one spar is connected swivelably through a link joint with the another spar, and the link joint comprises a lock and a stop. The stop consists of a joint stiffener, which is built as an extension of one spar and partially grips about the end of the other. In addition to that, the lock has a continuously adjustable final control element, with which the joint stiffener can be braced against the other spar. With the grip about the other spar, the flexural strength of the link joint of the swivelable roll bar is increased. Further, the bracing of the joint stiffener against the other spar eliminates the play in the link joint. The joint stiffener is preferably built as a U-shaped tubular segment that is attached to the latter as an extension of the spar.

1 . A swivelable roll bar with two vertical carriers, each one of which has one pair of spars, whereby, in each, one spar is connected swivelably through a link joint with the other spar and the link joint has a lock and a stop, 
 wherein,    the stop comprises a joint stiffener, which comprises a spar and which partly grips around the other spar; and that the lock comprises a continuously adjustable final control element, with which the joint stiffener can be braced against the other spar.    
   
   
       2 . A swivelable roll bar according to  claim 1 , 
 wherein,    the line of action of the lock lies essentially in the swivel plane of the spar.    
   
   
       3 . A swivelable roll bar according to  claim 1 , 
 wherein,    the joint stiffener comprises a U-shaped receiver.    
   
   
       4 . A swivelable roll bar according to  claim 3 , 
 wherein,    the U-shaped receiver is built with stationary attachment to one spar.    
   
   
       5 . A swivelable roll bar according to  claim 1 , 
 wherein,    the joint stiffener grips the other spar from three sides.    
   
   
       6 . A swivelable roll bar according to  claim 1 , 
 wherein,    the link joint comprises a hinge, whereby one, movable part of the hinge is the joint stiffener on one spar and the other part of the hinge is a hinge bearing, which is fastened on the other hinge.    
   
   
       7 . A swivelable roll bar according to  claim 1 , 
 wherein,    the final control element comprises a clamping screw.    
   
   
       8 . A swivelable roll bar according to  claim 7 , 
 wherein,    the lock comprises a clamping bolt.    
   
   
       9 . A swivelable roll bar according to  claim 8 , 
 wherein,    the joint stiffener has a recess in the region of the clamping bolt, whereby the recess is built in such a fashion that, in one position, the clamping bolt braces the joint stiffener against the other hinge, and in the other position, releases the joint stiffener.    
   
   
       10 . A swivelable roll bar according to  claim 1 , 
 wherein,    the lock consists of comprises a swivel bar with a clamping screw, whereby the swivel bar is swivelable about the joint stiffener and the clamping screw is the final control element.    
   
   
       11 . A swivelable roll bar according to  claim 10 , 
 wherein,    the clamping screw is built as a tommy screw.    
   
   
       12 . A swivelable roll bar according to  claim 1 , 
 wherein,    the lock is an eccentric clamp.    
   
   
       13 . A swivelable roll bar according to  claim 1 , 
 wherein,    the lock has a 2-arm swivel bar, whereby one arm of the swivel bar comprises a final control element and the other arm is swivelable about the joint stiffener.    
   
   
       14 . A swivelable roll bar according to  claim 1 , 
 wherein,    the link joint has an elastic bearing support, whereby the elastic bearing is arranged in such a fashion that on bracing, the joint stiffener is pressed against the other spar.