Security barrier

Abstract

A security barrier apparatus that includes a ground sleeve that is concreted into the ground at finish grade height and a uniquely configured jam member that is movable within the ground sleeve from a first free position to a second jammed position in engagement with the inner wall of the tubular sleeve. Connected to the jam member and extending upwardly therefrom is an elongated tension bar having an upper, internally threaded portion that is receivable within the hollow body portion of the apparatus. The jam member includes a tapered wall portion that is mateable with a tapered wall portion provided on the lower portion of the apparatus. A draw bolt extends through the cover of the ground sleeve and is adapted to threadably engage the upper threaded portion of the tension bar. Rotation of the draw bolt will cause the jam member to move upwardly within the ground sleeve in a manner to cause the tapered surface of the jam member to move into jamming engagement with the tapered surface of the ground sleeve securely locking the apparatus in place.

1 . A barrier apparatus comprising:
 (a) a sleeve having an upper portion and a lower portion;   (b) a jam member disposed within said lower portion of said sleeve, said jam member being movable within said sleeve from a first free position to a second jammed position in engagement with said tubular sleeve;   (c) a bollard body having an upper portion and a lower portion, said lower portion of said bollard body being receivable within said. upper portion of said sleeve;   (d) an elongated tension bar disposed within said bollard body and extending from said upper portion thereof to said lower portion thereof, said tension bar having an upper portion and a lower portion interconnected with said jam member; and   (e) actuating means operably interconnected with said tension bar for moving said jam member from said first free position to said second jammed position.   
   
   
       2 . The apparatus as defined in  claim 1  in which said upper portion of said elongated tension bar is threaded and in which said actuating means comprises a draw bolt threadably engageable with said upper portion of said elongated tension bar sleeve. 
   
   
       3 . The apparatus as defined in  claim 1  in which said bollard body and said jam member are generally cylindrical in shape. 
   
   
       4 . The apparatus as defined in  claim 3  in which said bollard body has a radially outwardly extending flange disposed between said upper and lower portions thereof. 
   
   
       5 . The apparatus as defined in  claim 4  in which said jam member includes a lower tapered wall portion and in which said lower portion of said bollard body includes a tapered surface mateable with said tapered wall portion of said jam member. 
   
   
       6 . The apparatus as defined in  claim 5  in which said sleeve has a longitudinal axis and in which said tapered surfaces of said jam member and said bollard body extend at an angle of approximately 30° with respect to said longitudinal axis. 
   
   
       7 . The apparatus as defined in  claim 5 , further including a plurality of apertured washers disposed within said bollard body for guiding travel of said tension bar therewithin. 
   
   
       8 . A barrier apparatus for controlling access to a controlled space comprising:
 (a) a subterranean tubular sleeve having an upper and lower portion;   (b) a generally cylindrically shaped jam member disposed within said lower portion of said sleeve, said jam member being movable within said sleeve from a first free position to a second jammed position in engagement with said tubular sleeve;   (c) a generally cylindrically shaped bollard body having an upper portion and a lower portion, said lower portion of said bollard body being receivable within said upper portion of said sleeve;   (d) an elongated tension bar disposed within said bollard body and extending from said upper portion thereof to said lower portion thereof, said tension bar having a threaded upper portion and a lower portion interconnected with said jam member; and   (e) actuating means interconnected with said tension bar for moving said jam member from said first free position to said second jammed position, said actuating means comprising a draw bolt threadably engageable with said upper portion of said elongated tension bar.   
   
   
       9 . The apparatus as defined in  claim 8 , in which said bollard body further includes a ground engaging flange disposed intermediate said upper portion and said lower portion. 
   
   
       10 . The apparatus as defined in  claim 8  in which said upper portion of said bollard body is open and in which said apparatus further includes a cover for closing said open end of said bollard body. 
   
   
       11 . The apparatus as defined in  claim 10  in which, said cover has an upper surface and is provided with an aperture and in which said draw bolt includes a threaded shank portion and an interconnected head portion, said threaded shank portion extending through said aperture in said cover and said head portion engaging said upper surface of said cover. 
   
   
       12 . The apparatus as defined in  claim 11  in which said jam member includes a lower tapered wall portion and in which said lower portion of said bollard body includes a tapered surface mateable with said tapered wall portion of said jam member, whereby rotation of said draw bolt will urge said tapered wall portion of said jam member into engagement with said tapered surface of said lower body of said bollard and will move said jam member into jamming engagement with said subterranean tubular sleeve. 
   
   
       13 . The apparatus as defined in  claim 12  in which said sleeve has a longitudinal axis and in which said tapered surfaces of said jam member and said bollard body extend at an acute angle with respect to said longitudinal axis. 
   
   
       14 . The apparatus as defined in  claim 13  in which said acute angle is approximately 30°. 
   
   
       15 . The apparatus as defined in  claim 13 , further including a plurality of alignment washers disposed within said bollard body for guiding the travel of said tension bar therewithin. 
   
   
       16 . A barrier apparatus for controlling access to a controlled space comprising:
 (a) a subterranean tubular sleeve having an upper portion and a lower portion;   (b) a generally cylindrically shaped jam member disposed within said lower portion of said sleeve, said jam member being movable within said sleeve from a first free position to a second jammed position in engagement with said tubular sleeve;   (c) a generally cylindrically shaped bollard body having an upper portion and a lower portion, said lower portion of said bollard body being receivable within said upper portion of said sleeve;   (d) a first apertured plate disposed within said bollard body;   (e) an elongated tension bar disposed within said bollard body and extending from said upper portion thereof to said lower portion thereof, said tension bar having a threaded upper portion and a lower portion interconnected with said jam member; and   (f) a draw bolt threadably engageable with said upper portion of said elongated tension bar sleeve, said draw bolt having a threaded shank portion extending through said first apertured plate and a head portion in engagement with said aperture plate.   
   
   
       17 . The apparatus as defined in  claim 16  further including a second apertured plate disposed within said bollard body at a spaced-apart location from said first apertured plate and a cover member removably connected to said bollard body. 
   
   
       18 . The apparatus as defined in  claim 17 , further including locking means carried by said second apertured plate for preventing unauthorized access to said draw bolt. 
   
   
       19 . The apparatus as defined in  claim 18  in which said locking means comprises a staple connected to said second apertured plate. 
   
   
       20 . The apparatus as defined in  claim 19  in which said locking means further comprises a lock releasably interconnected with said staple.