Method of setting a self-drilling, chemically anchorable fastening element and a self-drilling chemically anchorable fastening element

Abstract

A method of setting a self-drilling chemically anchorable fastening element ( 11; 51 ) includes mounting of an adaptor ( 31 ) on the second end ( 18; 58 ) of the shaft ( 12; 52 ) of the fastening element ( 11; 51 ), connecting the drilling power tool ( 41 ) with the adaptor ( 31 ), the adaptor having an engagement element ( 32 ) for the tool chuck ( 42 ), drilling a borehole ( 7 ) in the constructional component ( 6 ) with the self-drilling fastening element ( 11; 51 ), rotating the fastening element ( 11; 51 ) in a first rotational direction (R 1 ), forcing out the hardenable mass located in the receiving space of the shaft of the fastening element from the fastening element with an ejection device, and pre-stressing the fastening element ( 11; 51 ) after at least partial hardening of the hardenable mass ( 15; 55 ) by rotating the adaptor ( 31 ) in a second rotational direction (R 2 ) opposite the first rotational direction (R 1 ), with at least a section of the adaptor ( 31 ) being displaced in a direction of the first end ( 17; 57 ) of the shaft ( 12; 52 ) of the fastening element.

1 . A method of setting a self-drilling, chemically anchorable fastening element ( 11 ;  51 ) with use of a drilling power tool ( 41 ), the fastening element ( 11 ;  51 ) having a shaft ( 12 ;  52 ) with a receiving space ( 14 ;  54 ) for a hardenable mass ( 15 ;  55 ) provided in the fastening element ( 11 ;  51 ), a drilling head ( 16 ;  56 ) provided at a first end ( 17 ;  57 ) of the shaft ( 12 ;  52 ), and a thread-shaped outer profile ( 19 ;  59 ) provided at least partially at a second end ( 18 ,  58 ), the method comprising the steps:
 providing an adaptor ( 31 ) mountable on the second end ( 18 ;  58 ) of the shaft ( 12 ;  52 ) and having engagement means ( 32 ) for a chuck ( 42 ) of the drilling power tool ( 41 ) and provided on an outer side of the adaptor ( 31 ), and a thread-shaped inner profile ( 33 ) complementary to the thread-shaped outer profile ( 19 ;  59 ) on the shaft ( 12 ;  52 );   mounting of the adaptor ( 31 ) on the second end ( 18 ;  58 ) of the shaft ( 12 ;  52 ) of the fastening element ( 11 ;  51 );   connecting the drilling power tool ( 41 ) with the adaptor ( 31 );   drilling a borehole ( 7 ) in the constructional component ( 6 ) with the self-drilling fastening element ( 11 ;  51 ), rotating the fastening element ( 11 ;  51 ) in a first rotational direction (R 1 );   forcing out the hardenable mass ( 15 ;  55 ) located in the receiving space ( 14 ;  54 ) from the fastening element ( 11 ;  51 ) with an ejection device; and   pre-stressing the fastening element ( 11 ;  51 ) after at least partial hardening of the hardenable mass ( 15 ;  55 ) by rotating the adaptor ( 31 ) in a second rotational direction (R 2 ) opposite the first rotational direction (R 1 ), whereby at least a section of the adaptor ( 31 ) is displaced in a direction of the first end ( 17 ;  57 ) of the shaft ( 12 ;  52 ) of the fastening element.   
   
   
       2 . A setting method according to  claim 1 , wherein a stop ( 36 ) for the adaptor ( 31 ) is provided at the second end ( 18 ) of the shaft ( 12 ) of the fastening element ( 11 ). 
   
   
       3 . A setting method according to  claim 1 , wherein the drilling power tool ( 41 ) is provided with a constant motor ( 43 ) for drilling and pre-stressing. 
   
   
       4 . A setting method according to  claim 1 , wherein the thread-shaped outer profile ( 19 ;  59 ) at the second end of the shaft ( 12 ;  52 ) extends in a direction corresponding to the second rotational direction (R 2 ). 
   
   
       5 . A self-drilling, chemically anchorable, fastening element, comprising a shaft ( 52 ) with a receiving space ( 14 ;  54 ) for a hardenable mass ( 15 ;  55 ) provided in the fastening element ( 11 ;  51 ); a drilling head ( 16 ;  56 ) provided at a first end ( 17 ;  57 ) of the shaft ( 12 ;  52 ); a thread-shaped outer profile ( 19 ;  59 ) provided at least partially at a second end ( 18 ,  58 ); and a further thread-shaped outer profile ( 60 ) extending from the first end ( 57 ) of the shaft ( 52 ) in a direction corresponding to a first rotational direction (R 1 ) of the fastening element ( 52 ), the thread-shaped outer profile ( 59 ) that extends from the second end ( 58 ) of the shaft ( 52 ), extending in a direction opposite an extension direction of the further thread-shaped outer profile ( 60 ). 
   
   
       6 . A fastening element according to  claim 5 , wherein a pitch of the thread-shaped outer profile ( 59 ) extending from the second end ( 58 ) of the shaft ( 52 ) is flatter than a pitch of the further thread-shaped outer profile ( 60 ).