Door staying mechanisms
DOOR STAYS are mechanisms to keep a door shut or stay it in a particular open position. Normally stays are used to keep a shutter closing down, and so used on the internal (opening) face of the shutter, whereas latches and such mechanisms are used for preventing the opening of the shutter. Some stay mechanism is required to restrict movement of a pivoted door in one direction. Stays can be placed at the bottom, midway or at the top of the shutter. Other staying mechanisms are:stoppers, door restrictor door-stops, door catch, door closer and friction stays.
WEDGE STAY: A wedge is one of the oldest stay systems. It is made from wood, metal or stone. Wedges function due to friction from the floor surface.
WINGED STAYS: These are hinged flaps that can be opened out over the side of the stile of the shutter to prevent the door closing. These are fixed at handle height and so comfortable to operate.
PRESSURE STAYS work with vacuum or suction created in a hollowed rubber rim.
These are at floor level and so foot operated. Some stays when not used have an extra mechanism that turns to the closing edge of the door to keep it slightly ajar. These makes, it safer for children and old persons hurting their knuckles.
DOOR HOLDERS: These are fixed at the back of the door (where a wall or such striking face is available). The door side attachment is held by vacuum, magnet or mechanical snapping.SHUTTER HOLDERS or PREVENTORS: These are essentially restrictive arrangements that prevent a shutter from opening to full width.
These are used for hinged, pivoted and sliding doors to regulate the entry or exit. The mechanisms include stretchable ropes, chains or armed levers. Automatic doors have sensors that judge the width of the passage required and regulate the opening width.