| 摘要 |
<p>A security closure mechanism includes a receptor trap (3) and a transit trap (4). The transit trap (4) includes a carrier (5) on which the trap mechanism is detachably mounted, the trap mechanism including a housing (6), a closure member (8) rotatably mounted in the housing having a first position (29) in which the trap mechanism is in an open position and a second position (28) in which the trap mechanism is in a closed position with the passageway blocked by the closure member (8), and means (15, 20) for restricting rotation of the closure member between the open and closed conditions. The arrangement of the trap mechanism and the carrier (5) is such that when the trap mechanism is mounted on the carrier in the open condition (29) the mechanism cannot be removed from the carrier and the trap mechanism has to be moved to the closed position (30) for removal from the carrier. The means (15, 20) for restricting rotation of the closure member (8) is arranged to lock the trap mechanism in the closed condition.</p> |
