Formwork Anchor as well as a Method for Anchoring Formwork Elements and a Method for Removing a Formwork Anchor

Abstract

A formwork anchor comprises a threaded rod, screwable into a thread formed in a first formwork element, a shiftable and exchangeable cone provided on the threaded rod and a removal element that is connectable with the cone and to which a removal force can be applied to remove the cone from hardened concrete. A method for anchoring formwork elements comprises the steps of screwing a threaded rod of a formwork anchor into a thread that is formed in a first formwork element, connecting a shiftable and exchangeable cone provided on the threaded rod with a removal element and shifting the cone and the removal element relative to the threaded rod in the direction of the first formwork element. A method for removing a formwork anchor comprises the steps of removing a threaded rod of the formwork anchor from a thread formed in a first formwork element, whereby a cone provided on the formwork anchor shifts relative to the threaded rod, loosening the cone from the hardened concrete, and jointly removing the threaded rod and the cone.

1 . A formwork anchor comprising: 
 a threaded rod, screwable into a thread formed in a first formwork element;    a shiftable and exchangeable cone provided on said threaded rod, and    a removal element connectable to said cone for applying a removal force in order to remove said cone from hardened concrete.    
   
   
       2 . The formwork anchor according to  claim 1 , wherein the removal element is connectable to the cone by means of a left-hand thread.  
   
   
       3 . The formwork anchor according to  claim 1 , wherein the removal element comprises at least one actuation opening.  
   
   
       4 . The formwork anchor according to  claim 1 , wherein the removal element comprises at least one actuation section.  
   
   
       5 . The formwork anchor according to  claim 1 , comprising a stressing device for pressing the cone against the first formwork element.  
   
   
       6 . The formwork anchor according to  claim 5 , wherein the stressing device is actuated by means of a nut in conjunction with the threaded rod.  
   
   
       7 . The formwork anchor according to  claim 5 , wherein at least one resilient member is provided between the stressing device and the removal element and/or the cone.  
   
   
       8 . The formwork anchor according to  claim 5 , wherein the removal element and the stressing device are shiftably connected with one another.  
   
   
       9 . The formwork anchor according to  claim 1 , comprising several cones having a different length and a uniform larger end diameter.  
   
   
       10 . The formwork anchor according to  claim 1 , comprising a nut screwable onto the first formwork element on which the thread is formed.  
   
   
       11 . The formwork anchor according to  claim 1  in combination with at least one formwork element.  
   
   
       12 . A method for anchoring formwork elements, comprising the following steps: 
 screwing a threaded rod of a formwork anchor into a thread that is formed in a first formwork element;    connecting a shiftable and exchangeable cone provided on said threaded rod with a removal element; and    shifting said cone and said removal element relative to said threaded rod in the direction of the first formwork element.    
   
   
       13 . The method according to  claim 12 , wherein the cone is pre-stressed against the formwork surface of the first formwork element.  
   
   
       14 . The method according to  claim 13 , wherein during pre-stressing of the cone, at least one resilient member is pre-stressed.  
   
   
       15 . The method according to  claim 13 , wherein during pre-stressing of the cone, the removal element and a stressing device are shifted relative to one another.  
   
   
       16 . The method according to  claim 12 , wherein a nut is first fixed to the first formwork element on which a thread is formed.  
   
   
       17 . The method according to  claim 13 , wherein during pre-stressing of the cone, at least one resilient member is compressed.  
   
   
       18 . The method for removing a formwork anchor, comprising the following steps: 
 removing a threaded rod of the formwork anchor from a thread formed in a first formwork element, whereby a cone provided on said formwork anchor shifts relative to said threaded rod;    loosening said cone from a hardened concrete; and    jointly removing said threaded rod and said cone.    
   
   
       19 . The method according to  claim 18 , wherein the cone is loosened by means of rotational or axial movement.