64 is raised a pre determined spaced apart distance above housing 66 and a lower end 70 of pin 62 is located adjacent a top end 72 of channel 66 a flange 74 on lower end 70 of pin 62 engages with a shoulder 76 of top end 72 to prevent the hinge pin 62 being lifted completely out of engagement with channel 66 in use as the barrier means 6 moves to a closed position lower end 70 of pin 62 moves towards end 78 of housing 68 and a lower edge 80 of housing 64 moves adjacent to and or into engagement with top edge 82 of housing 68 edges 80 and 82 typically have complementary inclined edges to provide a neat aesthetic appearance to housings 64 68 resilient biasing means in the form of a spring not shown are associated with the hinge pin 62 to bias the hinge 34 to a closed position thus whenever the barrier means is opened as soon as a user lets go of the barrier means said barrier means moves to a closed position and the base member of the barrier means follows the ramp 52 of the automatic closure mechanism to shut the barrier means the latch mechanism 38 includes a handle portion 84 provided at upper end 40 of the barrier means 6 as shown in fig6 a latch.