Tube element

Abstract

A tube construction wherein on at least one end there is constructed a hook for the releasable fastening to a different structural part. A holding part of the hook is inserted into the end of the tube, and the tube end and the holding part are pressed together. The hook consists thereby of two plates which are spaced apart, and between which is pivotally fastened a safety bolt provided with a hook eyelet. The safety bolt has a locking element facing its axis, and the safety bolt has on its edge face at least one shoulder laterally offset with respect to the axis, which shoulder projects beyond the plates of the hook.

What is claimed is:  
     
         1 . A tube element, for example, for braces, railings on scaffolding, support structures and similar tube constructions, in which at least at one end of the tube ends there is constructed a hook for the releasable fastening of the tube element on a different structural part, wherein a holding part of the hook is inserted into the tube end of the tube element, wherein the tube end and the holding part are pressed together, wherein the hook consists of two plates which are spaced from one another, and between which a safety bolt provided with a hook eyelet is pivotably fastened, wherein the safety bolt has a locking element facing toward an axis, and wherein the safety bolt has on its edge face at least one shoulder laterally offset with respect to the axis, which shoulder projects beyond the plates of the hook.  
     
     
         2 . The tube element according to  claim 1 , wherein the face of the safety bolt has two shoulders lying on both sides of the axis.  
     
     
         3 . The tube element according to  claim 1 , wherein the nose is shaped such that it projects in the closed position beyond the contour of the hook.  
     
     
         4 . The tube element according to  claim 1 , wherein the safety bolt has on the side opposite the nose a bearing surface, which in the open position of the safety bolt extends into the space of the hook eyelet.  
     
     
         5 . The tube element according to  claim 1 , wherein the locking element has a stepped locking surface.  
     
     
         6 . The tube element according to  claim 1 , wherein the shoulder extending toward the tube element has a nose supported on the hook and/or the tube element.  
     
     
         7 . The tube element according to  claim 1 , wherein the hook is punched out of a flat material, of which two parts are placed against one another, and wherein holes and/or face-side notches are provided in the holding part, into which holes and/or notches is pressed the material of the tube element.  
     
     
         8 . The tube element, for example, for braces, railings on scaffolding, support structures and similar tube constructions, in which on at least one end of the tube ends there is constructed a hook for the releasable fastening of the tube element on a different structural part, wherein the tube end is lined with a tube sleeve, the cross section of which is chosen in such a manner that the outer contour of the tube sleeve is approximately equal to the inner contour of the tube end, whereby the length of the tube sleeve exceeds the one of the hook, and wherein the hook is constructed on a holding web from end pieces of the tube end and of the tube sleeve, which end pieces are upset together flat in the area of the hook, so that a hook eyelet is removed from the holding web.  
     
     
         9 . The tube element according to  claim 8 , wherein the flat upset end pieces form a holding web which is symmetrical with respect to the longitudinal axis of the tube element.  
     
     
         10 . The tube element according to  claim 8 , wherein the flat upset end pieces are spaced from one another.  
     
     
         11 . The tube element according to  claim 10 , wherein a flat safety bolt is pivotal about a hook axis between the end pieces, which hook axis is arranged in the tube end and is positioned perpendicular to the longitudinal axis of the tube element.  
     
     
         12 . The tube element according to  claim 8 , beads or similar indentations are deepened into the surfaces of the flat upset end pieces of the tube end, which beads or indentations extend into the surfaces of the adjacent, flat upset end pieces of the tube sleeves.  
     
     
         13 . The tube element according to  claim 9 , wherein the free end face of the tube end and the outer face of the tube sleeve are flush with one another.  
     
     
         14 . The tube element according to  claim 8 , wherein the height of the recess of the hook eyelet is greater than its width, and wherein the height of the knob is greater than the width of the recess.  
     
     
         15 . The tube element according to  claim 14 , wherein the width of the recess of the hook eyelet becomes smaller toward its opening.