AN ACCESS CONTROL SYSTEM

Abstract: This invention relates to an access control system. More particularly, the invention relates to an access control system and to a a component for an access control system. An access control system includes a cubicle defining means mountable adjacent an access opening to a premises, the cubicle defining means defining a cubicle (24) and an opening (26) which is arranged transversely to the access opening (28) of the premises and a closure member (16) pivotally arranged relative to the access opening (28) to be pivotal through a predetermined arc, an included angle of the arc being an acute angle, the closure member (16) being pivotal between a first position at one end of the arc, in which the access opening (28) is closed off and a third position at the other end of the arc, past a second, intermediate position. The system also includes a releasable obstruction arrangement which is operatively mounted relative to the closure member (16) to releasably obstruct movement of the closure member from the second position to the first position.

Description: 1 AN ACCESS CONTROL SYSTEM THIS INVENTION relates to an access control system. More particularly, the invention relates to an access control system and to a component for an access control system. According to a first aspect of the invention, there is provided an access control system which includes a cubicle defining means mountable adjacent an access opening to a premises, the cubicle defining means defining a cubicle and an opening which is arranged transversely to the access opening of the premises; a closure member pivotally arranged relative to the access opening to be pivotal through a predetermined arc, an included angle of the arc being an acute angle, the closure member being pivotal between a first position at one end of the arc, in which the access opening is closed off and a third position at the other end of the arc, past a second, intermediate position; and a releasable obstruction arrangement which is operatively mounted relative to the closure member to releasably obstruct movement of the closure member from the second position to the first position. The access control system may also include an extension member, extending from the cubicle defining means to lie substantially in the 2 same plane as the closure member when the closure member is in the third position. The cubicle defining means, the closure member and the extension member may be configured so that, once a person is positioned within the cubicle, the closure member must be pivoted into a position at least proximate the said one or said further position to permit the person to exit the cubicle. The system may further include a booth having a portion which forms the cubicle defining means and a framework extending from the cubicle defining means which pivotally supports the closure member. The closure member may be in the form of a door. The system may yet further include a locking mechanism for locking the door in the second position for inhibiting access to the premises, in use. The locking mechanism may also be configured to lock the door in the first position and the third position. The system may include a detecting means for detecting the presence of the person within the cubicle. The system may also include an entering means for enabling the person to enter information to gain access to the premises. The entering means may be in the form of a key pad, a card reader, or the like. 3 Thus, the locking mechanism may include a control means which is responsive to the detecting means and the entering means for disabling the locking mechanism and allowing the door to be moved from its second position to its first or third position. The locking mechanism may include a manual override arrangement. The arrangement may be configured to permit a user to manually operate the locking mechanism in the event of a power failure. The extension member of the cubicle defining means may be in the form of a flap which extends from one wall of the cubicle defining means at an angle to said wall to lie in the plane of the door when the door is in its third position. Conveniently, to enable bulky objects to be conveyed into the premises through the system, the flap may be hingedly connected to said wall of the cubicle defining means to be pivoted out of the way. Further, if desired, the flap may be connected to the door via a linkage so that the flap moves to the position in said plane as the door is moved from its first position to its third position. The cubicle defining means may comprise, for new installations, three wall portions with the walls being arranged at right angles to each other to define the cubicle. Conversely, for existing premises, the cubicle defining means may only have two walls which are arranged at substantially right angles to each other with a third wall of the cubicle then being defined by an 4 existing wall of the premises. The system may include a drive means for driving the door between its first, second and third positions. The invention also extends to a component for an access control system, the component including a cubicle defining means mountable adjacent an access opening of a premises; and an extension extending from one wall of the cubicle defining means to close off a gap between a closure member and an end of the wall of the cubicle defining means. The invention is now described, by way of examples, with reference to the accompanying diagrammatic drawings. In the drawings, Figure 1 shows a three dimensional view of a first embodiment of an access control system, in accordance with the invention; Figure 2 shows a schematic, sectional plan view of the system of Figure 1 ; Figure 3 shows an end view of the system of Figure 1 ; Figure 4 shows a schematic representation of a locking mechanism of the system of Figure 1 ; 5 Figure 5 shows a schematic, three dimensional view of a second embodiment of an access control system, in accordance with the invention; Figure 6 shows a schematic plan view of the system of Figure 5; Figure 7 shows an inside view of the system of Figure 5; Figure 8 shows a side view of the system of Figure 5; and Figure 9 shows a cut-away view of part of a locking mechanism of the system of Figure 5. Referring to the drawings, reference numeral 1 0 generally designates a first embodiment of an access control system in the form of a security booth. The booth 10 comprises a framework 1 2 (Figure 2) on which a cubicle defining portion 14, which defines a cubicle 24, is supported. A closure member in the form of a door 1 6 is pivotally supported on the framework 1 2. The portion 14 includes a pair of opposed, side panels 1 5 and an end panel 1 7. One of the side panels 1 5.1 is mounted on a wall 1 9 of a building. An extension member in the form of a flap 1 8 extends from the opposed side panel 1 5.2 of the cubicle defining portion 14. The flap 1 8 is hingedly connected via a hinge 22 to the side panel 1 5.2 of the cubicle defining portion 14. 6 The door 1 6 is pivotal between a first position, as shown in solid lines in Figure 2 of the drawings, and a second position, as shown in dotted lines in Figure 2 of the drawings, through a predetermined arc of angle A. The angle A is an acute angle and, preferably, is less than 45° and, optimally, is about 30°. The cubicle defining portion 14 defines a cubicle 24 therein and the panels 1 5, 17 of the cubicle defining portion 14 define an opening 26 which extends at substantially right angles to an access opening 28 closed off by the door 1 6 when the door 1 6 is in its first position. The access opening 28 is bounded by a door frame 30 on which the door 1 6 is hingedly mounted via a hinge 32. The booth 10 includes a locking mechanism 34 (Figure 4) which is mounted in an enclosure 36 (Figure 1 ) above the booth 10, in use. The locking mechanism 34 includes a locking plate 38 and a pair of displacing members 40, 42 which act on the plate 38, as will be described in greater detail below. An upper edge of the door 16 carries a pin 44 thereon and the plate 38 has a number of catches 46 defined thereon which are engaged by the pin 44 when an attempt is made to move the door from its second position (as shown in solid lines in Figure 4 of the drawings) or an intermediate position to its first position. The plate 38 is pivotally mounted in the enclosure 36 via a pivot 7 pin 48 which extends through a slot 50 in the plate 38. When the door 1 6 is moved from its first position to its second position, the pin 44 can pass the catches 46 due to the pivotal mounting of the plate 38 about the pivot pin 48. In this regard it is to be noted that the displacing member 40 includes a piston/cylinder assembly 52 with a link 54 carried on a piston of the assembly 52. The link 54 has an elongate slot 56 defined therein to connect the link 54 to the plate 38 in a lost-motion manner. For this purpose, a pin 58 projects from the plate 38 and is received in the slot 56 of the link 54. In a similar manner, the displacing member 42 comprises a piston/cylinder assembly 60 with a link 62 connected to a piston of the assembly 60. The link 62 defines a slot 64 therein in which a pin 66, projecting from the plate 38, is received in a lost-motion manner. The locking mechanism 34 also includes an urging means in the form of a coil spring 68 which urges the plate 38 to the position as shown in Figure 4 of the drawings. As described above, when the door 1 6 is moved from its first position to its second position, the pin 44 slides past the catches 46 due to the displacement of the plate 38 in the direction of arrow 70. Once the pin 44 has passed the catches 46, the spring 68 returns the plate 38 to its rest position. The catches 46 are so shaped that should an unauthorised attempt 8 be made to move the door 1 6 from its second position to its first position, the pin 44 bears against one of the catches 46 and so inhibits return of the door 1 6 to its first position. To enable the door 1 6 to be returned from the second position to the first position, the booth 1 0 includes a detecting means in the form of an infra-red detector 72 therein. Further, the booth 10 includes an entering means in the form of a keypad 74. Hence, in use, should a person wish to gain access to the premises in which the booth 10 is mounted, the door 1 6 is moved from its first position to its second position to enable the person to enter the cubicle 24 of the cubicle defining portion 14. The detector 72 detects the presence of the person in the cubicle 24 and the person enters an access code via the keypad 74. Should the correct access code be entered, the link 54 of the piston/cylinder assembly 52 is retracted, in the direction of arrow 76, so moving the catches 46 out of the path of the pin 44. Thus, the door 1 6 can be moved from its second position to its first position to enable the person to pass the flap 1 8 into the interior of the premises. Should no person be detected by the detector 72 or the incorrect access code be entered via the keypad 74 the link 54 of the displacement member will not be retracted thereby inhibiting movement of the door 1 6 from its second position to its first position. 9 To enable bulky objects to be moved through the booth 1 0 into or out of the premises, the displacing member 42 is operated to cause the link 62 to be retracted in the direction of arrow 78. In so doing, a catch 80 defined by the plate 38 releases a pin 82 projecting from a top of the flap 1 8. The flap 1 8 can then be pivoted about the hinge 22 to lie against the panel 1 5.2 of the cubicle defining portion 14. It is to be noted that, to ensure that the flap 1 8 lies in the same plane as the door occupies when the door 1 6 is in its second position, the flap 18 abuts against an angled extension 84 of the panel 1 5.2 of the cubicle defining portion 14. In Figures 5 to 9, reference numeral 90 generally indicates a second embodiment of an access control system in the form of a security booth. With reference to Figures 1 to 4, like numerals refer to like parts, unless otherwise specified. Instead of being mechanically operated, the control booth 90 is electronically controlled. Thus, the control booth 90 includes a power supply 92 and a PLC (programmed logic controller) and user interface 94. The booth 90 has a roof 96 which is mounted on the panels 1 5. The roof 96 comprises a pair of spaced panels 98, namely a lower panel 98.1 and an upper panel 98.2. 10 The lower panel has three spaced slots 100 defined therein. A locking device 102 is mounted in an upper edge 104 of the door 1 6. The locking device 102 is in the form of a mortise-type lock which has a locking member 106 which is dimensioned to be received in any one of the slots 1 00. The locking device 102 is connected to the PLC 94 to be controlled thereby. A sensing device 108 is mounted proximate each slot 1 00 to detect the presence of the locking device 102 when the locking member 1 06 is aligned with any one of the slots 100. The sensing devices 1 08 are also connected to the PLC so that, when the locking member 1 06 is detected to be in alignment with any one of the slots 100, the PLC actuates the locking device 102 to extend the locking member 106 into any of the slots 100. The slots 100 are positioned so that, when the door 1 6 is in a first, closed position, as shown in Figure 6, the locking member 1 06 is received in a first slot 100.1 . When the door 1 6 is in a second, intermediate position, the locking member 106 is received in a second slot 1 00.2. When the door 1 6 is in a third, closed position, the locking member 106 is received in a third slot 1 00.3. The booth 90 is positioned so that, when the booth 90 is mounted on the wall 1 9 of the building, the door 1 6 closes an access opening 1 10 of the building, when the door 1 6 is in its first position. 1 1 The slots 100 are positioned so that, in order for a person to proceed from the access opening 1 10 to the cubicle 24, the door 1 6 must move at least into its second position. The side panel 1 5.2 has a control flap 1 1 2 hingedly mounted on a free end 1 14 thereof. The control flap 1 1 2 is pivotal from a first position and a second position, shown in Figures 5 and 6, in which a gap between the control flap 1 1 2 and the second slot 1 00.2 is enlarged. The control flap 1 1 2 is dimensioned so that when a person is in the cubicle 24, the door 16 is in its second position, and the flap 1 12 is in its first position, a user is prevented from exiting the cubicle 24. A solenoid door blocker 1 1 6 is mounted on the lower roof panel 98.1 . The solenoid roof blocker 1 1 6 is shown in more detail in Figure 9. The door blocker 1 1 6 includes an obstruction member 1 1 8 which is driven by a solenoid 1 20. The solenoid 1 20 is such that, in its fail-safe position, the obstruction member 1 1 8 extends downwardly through an opening 1 22 to project downwardly from the lower panel 98.1 . The blocker 1 1 6 is positioned adjacent the slot 1 00.2 intermediate the slots 1 00.1 and 100.2. The blocker 1 1 6 incorporates a sensor (not shown) which is capable of sensing the door 1 6 when the door 1 6 passes the opening 1 22. The sensor then serves to actuate the solenoid 1 20 so that the solenoid 1 20 releases the obstruction member 1 1 8 so that the obstruction member 1 1 8 inhibits the door 1 6 from returning to its first position once the door 1 6 has passed the opening 1 22. A further locking device 1 24 which is also in the form of a 1 2 mortise-type lock is mounted in a free side edge 1 26 of the door 1 6. A free side edge 1 28 of the panel 1 5.1 has a slotted recess which is dimensioned to receive a locking member of the locking device 1 24. The locking device 1 24 is key-operated so that a user can unlock or lock the device 1 24 via a key from inside the building. It is to be understood that the further locking device 1 24 can also be connected to the PLC 94 to be controlled thereby. In this case, instead of being key operated, the device 1 24 can be operated electronically, via a card or the like. The device 1 24 is connected to the PLC 94 so that, when a user unlocks the device 1 24, the locking member 1 06 moves out of the slot 1 00. 1 . In its operative position, the control flap 1 1 2 is locked in a position in which the flap 1 1 2 extends from the free end 1 1 4 of the panel 1 5.2 to constrain the movement of the door 1 6 between its first and third positions. A control flap lock 1 32 is mounted on the control flap 1 1 2 to permit the control flap 1 12 to be unlocked and pivoted into the cubicle 24. This permits the door 1 6 to pivot through 90°, if direct access to the building is required. This could be necessary for the movement of bulky equipment through the booth 90. A presence sensor 1 34 is mounted in the cubicle 24 to detect 1 3 the presence of a person within the cubicle 24. The presence sensor 1 34 is also connected to the PLC 94. A key pad 1 36 is mounted on the panel 1 5.1 to be accessible to a person in the cubicle 24. The key pad 1 36 is connected to the PLC 94 so that when a correct code is entered on the key pad 1 36, the PLC actuates the solenoid 1 20 to permit the door 1 6 to move into its first position. In order to enter the building, when the door 1 6 is in its first position, the door 1 6 is first unlocked. The door 1 6 is then pushed past the door blocker 1 1 6 which actuates to prevent the door 1 6 from being moved back into its first position. At this stage, there is sufficient space for the user to enter the cubicle 24 but not to exit the cubicle 24 into the building. The person then enters a code on the key pad 1 36. In the event that the code is recognised by the PLC 94, the obstruction member 1 1 8 is withdrawn to permit the door 1 6 to be moved back into its first position so that a person can exit the cubicle and enter the building. The PLC 94 is such that in the event that a presence of a person and the correct code entered on the key pad 1 36 are not simultaneous occurrences, the door obstruction member will not be withdrawn. It will be appreciated that this inhibits hostage situations within the cubicle 24. In the event that the door is moved into the second position, with the locking member 1 06 aligned with the slot 100.2 the sensing device 14 108.2 senses the presence of the door 16 and the PLC then actuates the locking device 102 so that the locking member 106 moves into the slot 100.2 thereby locking the door 16 in position. Release of the locking device 102 occurs in the same manner as release of the door blocker 1 16, as described above. In the event that the door 1 6 is moved into the third position with the locking member 106 aligned with the slot 100.3, then the sensing device 108.3 signals the PLC 94. The PLC 94 then actuates the locking device 102 and the locking member 106 is driven into the slot 100.3 so that the door 1 6 is locked in its third position. Since the obstruction member 1 18 moves into its blocked position in a fail-safe condition, this will occur should there be a power failure. The door blocker 1 1 6 is connected to a pair of barrel/cylinder locks 138. One lock 138.1 is accessible from outside the building. The other lock 138.2 is accessible from inside the building. A cable 145 is connected to the cylinder 140 of each block 138. Each cable 145 is connected to a rod 142 which is slidably mounted in a housing 144 of the blocker 1 16. The rod 142 is connected to a 90° camming arrangement 146. The camming arrangement 146 is connected to the obstruction member 1 18. Each cylinder 140 is configured to receive a high security key (not shown). Upon insertion and rotation of the key, each cylinder 140 can be removed from its associated barrel 148. By pulling the cylinder 140, and thus its associated cable 145, the rod 142 slides relative to the housing 144 and actuates the 90° camming arrangement 146 so that the obstruction member 1 18 is withdrawn from the 1 5 opening 1 22. The locking device 102 is also manually operable via a high security key so that the locking device can be overridden should a power failure occur. The control flap lock 132 is operable via a T-key which is insertable into a locking mechanism (not shown) above the control flap 1 1 2. It follows that the booth 90 can be opened and closed manually in the event of a power failure. The booth 90 includes an audible alarm (not shown) which is actuated should the power supply be returned to the control booth while the locking device 102, the control flap 1 12 and the blocker 1 1 6 are in the open condition as a result of being manually operated. It is an advantage of the invention that an access control booth 1 0 is provided which is of relatively low complexity and, accordingly, of relatively low cost. Further, the booth 1 0 occupies less space than conventional access control systems of which the applicant is aware. It is a further advantage of the invention that there is provided an access control booth 10, 90, which provides a means whereby a hostage 16 situation within the cubicle 24 is inhibited through co-operation of the presence sensor 134, the locking device 102 and the door blocker 116.

Claims: 1 7 CLAIMS: 1 . An access control system which includes a cubicle defining means mountable adjacent an access opening to a premises, the cubicle defining means defining a cubicle and an opening which is arranged transversely to the access opening of the premises; a closure member pivotally arranged relative to the access opening to be pivotal through a predetermined arc, an included angle of the arc being an acute angle, the closure member being pivotal between a first position at one end of the arc, in which the access opening is closed off and a third position at the other end of the arc, past a second, intermediate position; and a releasable obstruction arrangement which is operatively mounted relative to the closure member to releasably obstruct movement of the closure member from the second position to the first position. 2. The access control system as claimed in claim 1 , which includes an extension member, extending from the cubicle defining means to lie substantially in the same plane as the closure member when the closure member is in the third position. 3. The access control system as claimed in claim 1 , which includes a booth having a portion which forms the cubicle defining means and a framework extending from the cubicle defining means which pivotally supports the closure member. 1 8 4. The access control system as claimed in claim 1 , in which the closure member is in the form of a door. 5. The access control system as claimed in claim 1 , which includes a locking mechanism for locking the door in the second position for inhibiting access to the premises, in use. 6. The access control system as claimed in claim 5, in which the locking mechanism is configured to lock the door in the first position and the third position. 7. The access control system as claimed in claim 6, which includes a detecting means for detecting the presence of the person within the cubicle. 8. The access control system as claimed in claim 7, which includes an entering means for enabling the person to enter information to gain access to the premises. 9. The access control system as claimed in claim 8, in which the locking mechanism includes a control means which is responsive to the detecting means and the entering means for disabling the locking mechanism and allowing the door to be moved from its second position to its first or third position. 1 9 1 0. The access control system as claimed in claim 6, in which the locking mechanism includes a manual override arrangement, which is configured to permit a user to manually operate the locking mechanism in the event of a power failure. 1 1 . The access control system as claimed in claim 2, in which the extension member of the cubicle defining means is in the form of a flap which extends from one wall of the cubicle defining means at an angle to said wall to lie in the plane of the door when the door is in its third position. 1 2. The access control system as claimed in claim 1 1 , in which the flap is hingedly connected to said wall of the cubicle defining means to be pivoted out of the way to enable bulky objects to be conveyed into the premises. 1 3. The access control system as claimed in claim 1 1 , in which the flap is connected to the door via a linkage so that the flap moves to the position in said plane as the door is moved from its first position to its third position. 14. The access control system as claimed in claim 1 , in which the cubicle defining means comprises, for new installations, three wall portions with the walls being arranged at right angles to each other to define the cubicle. 20 1 5. The access control system as claimed in claim 1 , in which the cubicle defining means has, for existing premises, two walls which are arranged at substantially right angles to each other with a third wall of the cubicle then being defined by an existing wall of the premises. 1 6. The access control system as claimed in claim 1 , which includes a drive means for driving the closure member between its first, second and third positions. 1 7. A component for an access control system, the component including a cubicle defining means mountable adjacent an access opening of a premises; and an extension extending from one wall of the cubicle defining means to close off a gap between a closure member and an end of the wall of the cubicle defining means. 1 8. An access control system, substantially as herein described with reference to the accompanying drawings. 1 9. A component for an access control system, substantially as herein described with reference to the accompanying drawings.

Inventors: THOMAS MALCOLM WILLIAM, THOMAS, MALCOLM, WILLIAM
Applicants: THOMAS MALCOLM WILLIAM, THOMAS, MALCOLM, WILLIAM
Application year: 1999
Main classification: E05G5
IPC codes: E05G5, E06B5, G07C9