Post Anchor and Post Comprising the Same

Abstract

Disclosed is a post anchor ( 1 ) comprising two final sections ( 11, 12 ), one ( 11 ) of which can be introduced into a post ( 10 ) while the other one ( 12 ) is used for fixing the anchor ( 1 ) to or in another element. The section ( 11 ) that can be introduced into the post represents a drill bit section ( 11 ) which is used for introducing a bore ( 20 ) into the post ( 10 ) in a substantially stress-free manner. The drill bit section ( 11 ) in the bore ( 20 ) is provided with essentially no axial clearance and is preferably embodied as a screw bit. The drill bit section ( 11 ) has a first smaller drill core diameter ( 31 ) in a first zone ( 31 ) bordering the tip thereof while having a larger drill core diameter ( 32 ) in a second zone ( 32 ) located closer to the other section ( 12 ) in the longitudinal direction thereof ( 13 ).

1 - 10 . (canceled) 
   
   
       11 . A post comprising:
 a drillhole provided in a longitudinal end surface of the post and   a post anchor,   wherein the post anchor comprises:
 a first section, being a drill bit section and extending into the drillhole of the post and 
 a second section intended for fastening on or in another element, 
 wherein the first section comprises:
 a first segment, adjacent to its tip and having a first drilling core diameter and 
 a second segment, arranged nearer to the second section and having a second drilling core diameter, 
 wherein the first drilling core diameter is smaller than the second drilling core diameter, 
 wherein the drillhole has substantially no radial play with said drill bit section. 
 
   
   
   
       12 . The post as claimed in  claim 11 , wherein an adhesive is provided in the free space between the drill bit section and the drill hole in radial direction. 
   
   
       13 . The post as claimed in  claim 11 , wherein an adhesive is provided in the free space between the drill bit section and the drill hole in axial direction. 
   
   
       14 . The post as claimed in  claim 11 , wherein the drill bit is an auger bit in the first and in the second segment. 
   
   
       15 . The post as claimed in  claim 11 , wherein the first section comprises a third segment, arranged between the first and second segment and having a drill core diameter which is larger than the drill core diameter of the first segment and smaller than the drill core diameter of the second segment. 
   
   
       16 . The post as claimed in  claim 11 , wherein it is designed in one piece and in that the other section is a threaded rod. 
   
   
       17 . The post as claimed in  claim 11 , wherein it is designed in one piece and in that the two sections abut. 
   
   
       18 . The post as claimed in  claim 11 , wherein the drill bore is provided centrally in the longitudinal end surface of the post. 
   
   
       19 . The post as claimed in  claim 11 , wherein the post is made of wood or of plastic materials. 
   
   
       20 . The post as claimed in  claim 11 , wherein the post has a square, elliptical, rectangular or polygonal cross section. 
   
   
       21 . A post anchor comprising:
 a first section, being a drill bit section and intended to extend into a drillhole of a post and   a second section intended for fastening on or in another element,   wherein the first section comprises
 a first segment, adjacent to its tip and having a first drilling core diameter and 
 a second segment, arranged nearer to the second section and having a second drilling core diameter, 
 wherein the first drilling core diameter is smaller than the second drilling core diameter. 
   
   
   
       22 . The post anchor as claimed in  claim 21 , wherein the ratio between the axial length of the first area having the first drilling core diameter to the area having the second drilling core diameter is between 1:3 and 1:1 
   
   
       23 . The post anchor as claimed in  claim 21 , wherein the first drilling core diameter is set between one fourth to one half of the external diameter of the drill bit and the second drilling core diameter is set between one half and ⅘ of the external diameter of the drill bit. 
   
   
       24 . A method of introducing a post anchor into a post, wherein the post comprises:
 a drillhole provided in a longitudinal end surface of the post and   a post anchor, and   wherein the post anchor comprises:
 a first section, being a drill bit section and extending into the drillhole of the post and 
 a second section intended for fastening on or in another element, 
 wherein the first section comprises:
 a first segment, adjacent to its tip and having a first drilling core diameter and 
 a second segment, arranged nearer to the second section and having a second drilling core diameter, 
 wherein the first drilling core diameter is smaller than the second drilling core diameter, 
 wherein the drillhole has substantially no radial play with said drill bit section, 
 the method comprising the steps of:
 drilling a drillhole in the post with the drill bit section of the post anchor, 
 introducing an adhesive into the drillhole with the drill bit section inserted so as to take up, by filling, any remaining radial play and the axial play of the drill bit section in the drillhole, or, alternatively, withdrawing the drill bit section, introducing adhesive into the drillhole and reinserting the drill bit section into the at least partially adhesive-filled drillhole. 
 
 
   
   
   
       25 . The method as claimed in  claim 24 , characterized in that, prior to introducing the adhesive, the post anchor is rotated back by an eighth to a half of a rotation.