Security bollard

Abstract

A security bollard comprising: an outer sleeve arranged to be set in the ground in a generally vertical orientation; a post telescopically or otherwise slidably received within the outer sleeve for movement between respective retracted and extended positions with respect to the sleeve; and locking means which is arranged to lock the post in its extended condition with respect to the sleeve and which is frangible or readily accessible exteriorly of the post, to allow the post to be moved from its extended to its retracted condition with respect to the outer sleeve.

1 . A security bollard comprising: 
 an outer sleeve arranged to be set in the ground in a generally vertical orientation;    a post telescopically or otherwise slidably received within the outer sleeve for movement between respective retracted and extended positions with respect to the sleeve; and    locking means which is arranged to lock the post in its extended condition with respect to the sleeve and which is frangible or readily accessible exteriorly of the post, to allow the post to be moved from its extended to its retracted condition with respect to the outer sleeve.    
   
   
       2 . A securing bollard according to  claim 1 , wherein the inner post comprises respective outer and inner elongate members of which the outer is telescopically or otherwise slidably received within the outer sleeve and the inner member is rotatable about its longitudinal axis with respect to the outer member between respective unlocking and locking positions.  
   
   
       3 . A security bollard according to  claim 2 , wherein the inner member comprises means arranged to engage with a complementary-shaped slot in the outer sleeve, upon rotation of the inner member with respect to the outer member, to retain the post in its extended condition with respect to the outer sleeve.  
   
   
       4 . A security bollard according to  claim 2 , wherein the inner member is tubular or solid.  
   
   
       5 . A security bollard according to  claim 3 , wherein said engaging means comprises a radially-extending  
   
   
       6 . A security bollard according to  claim 5 , wherein when the spigot of the inner member is engaged within the slot(s) and the inner member is rotated, to retain the post in its extended condition with respect to the outer sleeve, the inner member can be simultaneously rotated from its unlocking to its locking position with respect to the outer member.  
   
   
       7 . A security bollard according to  claim 2 , wherein the outer and inner elongate members are circular in cross-section.  
   
   
       8 . A security bollard according to  claim 7 , wherein the inner elongate member has a pair of diametrically opposed spigots which engage in respective ones of a pair of slots in diagonally-opposed corner regions of a square-cross-sectioned outer sleeve.  
   
   
       9 . A security bollard according to  claim 8 , wherein the pair of slots are linear.  
   
   
       10 . A security bollard according to  claim 8 , wherein the pair of slots are dog-legged or cranked.  
   
   
       11 . A security bollard according to  claim 2 , wherein said locking means includes, in part, respective apertures in the top ends of the outer and inner members, which apertures are in-register with each other when the inner member is in its locking position and are not in-register with each other when the inner member is in its unlocking position with respect to the outer member.  
   
   
       12 . A security bollard according to  claim 11 , wherein, when the two apertures in the respective top ends of the inner and outer members are in-register with each other, a frangible or readily-removable element is receivable through the in-register apertures, to maintain the inner member in its locking position with respect to the outer member, thereby retaining the post in its extended condition with respect to the outer sleeve.  
   
   
       13 . A security bollard according to  claim 12 , wherein the frangible or readily-removable element comprises a closed loop of heavy duty wire or the U-shaped arm of a padlock.  
   
   
       14 . A security bollard according to  claim 1 , wherein the top end of the post includes a manoeuvring handle which, when not in use, sits in a correspondingly-shaped recess provided in the top end of the inner member, generally flush therewith.