Frame element with a support head, and building scaffold comprising such a frame element

Abstract

The invention relates to a frame element (10) comprising a frame pipe (12) into which a threaded spindle (16) is partly introduced at one end. The threaded spindle (16) is guided in the frame pipe (12) by at least one spindle positioning groove (24, 26, 28), in particular multiple spindle positioning grooves (24, 26, 28). The frame pipe (12) is mechanically reinforced by the spindle positioning groove(s) (24, 26, 28) in the region of the threaded spindle (16) received in the frame pipe (12). At the same time, the maximum inclination of the threaded spindle (16) in the frame pipe (12) is reduced by the spindle positioning grooves (24, 26, 28). Overall, a force can thus be substantially more strongly applied to the frame element (10) in the direction of the longitudinal axis (23b) of the frame pipe (12). At the other end, the frame pipe (12) has at least one pin positioning groove (40, 42), in particular multiple pin positioning grooves (40, 42). Alternatively or in addition thereto, the frame pipe (12) can have at least one reinforcing groove in the region of a node point. Alternatively or in addition thereto, the frame pipe (12) can have at least one additional reinforcing groove between two node points.

1 . A frame element ( 10 ) fora building scaffold ( 74 ), the frame element ( 10 ) having the following:
 a) A support head ( 76 ) having a threaded spindle ( 16 );   b) a frame pipe ( 12 ) that can be mounted vertically in the building scaffold ( 74 ) having a spindle receiving portion ( 14 ) on a first axial frame pipe end ( 34 ), the threaded spindle ( 16 ) being introduced partially into the spindle receiving portion ( 14 );   c) a spindle nut ( 20 ) mounted to the threaded spindle ( 16 ), the support head ( 76 ) introducing its vertical load into the frame pipe ( 12 ) via the threaded spindle ( 16 ) in the mounted state of the frame element ( 10 ).   
       characterized in that the spindle receiving portion ( 14 ) has a first spindle positioning groove ( 24 ) that reduces the inner diameter of frame pipe ( 12 ). 
     
     
         2 . The frame element according to  claim 1 , characterized in that the first spindle positioning groove ( 24 ) radially centers the threaded spindle ( 16 ) in the frame pipe ( 12 ) in such a way that the longitudinal axis ( 23   a ) of the threaded spindle ( 16 ) is inclined at the angle ß relative to the longitudinal axis ( 23   b ) of the frame pipe ( 12 ), the angle ß being less than 1°. 
     
     
         3 . The frame element according to  claim 1  or  2 , characterized in that the first spindle positioning groove ( 24 ) extends in the circumferential direction of the frame pipe ( 12 ), the first spindle positioning groove ( 24 ) being designed to be discontinuous or circumferential in the circumferential direction of the frame pipe ( 12 ). 
     
     
         4 . The frame element according to any of the preceding claims, characterized in that the axial spacing of the first spindle positioning groove ( 24 ) from the first axial frame pipe end ( 34 ) is smaller than the inner diameter of the spindle receiving portion ( 14 ). 
     
     
         5 . The frame element according to any of the preceding claims, characterized in that the spindle receiving portion ( 14 ) has a second spindle positioning groove ( 26 ) that is axially spaced apart from the first spindle positioning groove ( 24 ) and reduces the inner diameter of the frame pipe ( 12 ). 
     
     
         6 . The frame element according to  claim 5 , characterized in that the spindle receiving portion ( 14 ) has a third spindle positioning groove ( 28 ) that is axially further spaced from the first spindle positioning groove ( 24 ) than the second spindle positioning groove ( 26 ) and reduces the inner diameter of the frame pipe ( 12 ). 
     
     
         7 . The frame element according to  claim 6 , characterized in that the third spindle positioning groove ( 28 ) is axially spaced not as far from the second spindle positioning groove ( 26 ) as the second spindle positioning groove ( 26 ) is from the first spindle positioning groove ( 24 ). 
     
     
         8 . The frame element according to any of the preceding claims, characterized in that the frame pipe ( 12 ) has a pin receiving portion ( 38 ) at its second axial frame pipe end ( 36 ) into which a pin ( 32 ) of a further frame element ( 30 ) can be introduced, the pin receiving portion ( 38 ) having a first pin positioning groove ( 40 ) that reduces the inner diameter of the frame pipe ( 12 ). 
     
     
         9 . The frame element according to  claim 8 , characterized in that the pin receiving portion ( 38 ) has a second pin positioning groove ( 42 ) that is axially spaced apart from the first pin positioning groove ( 40 ) and reduces the inner diameter of the frame pipe ( 12 ). 
     
     
         10 . The frame element according to any of the preceding claims, characterized in that the frame pipe ( 12 ) has a node point ( 44 ) on which
 a) a crossbar ( 48 ,  50 ) of the frame element ( 10 ) is connected to the frame pipe ( 12 ), or   b) a coupling point ( 46 ), in particular in the form of a rosette, is designed for connecting a crossbar ( 48 ,  50 ),   
       the frame pipe ( 12 ) having a first reinforcing groove ( 54 ) in the region of the node point ( 44 ) that is spaced less than 15 cm from the node point ( 44 ) in a first axial direction ( 56 ) and
 i. reduces the inner diameter of frame pipe ( 12 ) or 
 ii. increases the outer diameter of frame pipe ( 12 ). 
 
     
     
         11 . The frame element according to  claim 10 , characterized in that the frame pipe ( 12 ) has a further reinforcing nut ( 64 ) in the region of the node point ( 44 ) that is spaced less than 15 cm from the node point ( 44 ) in a second axial direction ( 66 ) opposite the first axial direction ( 56 ) and
 i. reduces the inner diameter of frame pipe ( 12 ) or   ii. increases the outer diameter of frame pipe ( 12 ).   
     
     
         12 . A building scaffold ( 74 ) having a frame element ( 10 ) according to any of the preceding claims.