A projection hinge is a type of door hinge specifically designed to allow a door to open fully to a wide angle, typically up to 180 degrees.
These hinges are similar to Parliament hinges and are used to enable doors to open fully up to 180 degrees. Their unique design facilitates this extended range of motion.
How Projection Hinges Work
The key to the projection hinge's function lies in its construction, as highlighted in the reference:
- Broad Leaf Design: Projection hinges feature a broad leaf (the part that attaches to the door or frame).
- Offset Fixing Points: The fixing points (where screws are drilled) on this broad leaf are positioned or "drilled toward the edge" of the leaf.
- Pivot Point Placement: This positioning of the fixing points allows the hinge's pivot point (the knuckle where the hinge rotates) to be located further away from the edge of the door compared to standard hinges.
This offset pivot point creates extra clearance between the door and the frame or wall, preventing the door from hitting the surrounding structure and enabling it to swing through a full 180-degree arc.
Key Features and Benefits
- Maximum Door Swing: Allows doors to lie flat against the adjacent wall when fully open.
- Increased Clearance: Provides additional space between the door edge and the frame when opening.
- Improved Accessibility: Ideal for situations where maximum access through a doorway is required.
- Durable Construction: Typically built to support the door while accommodating the extended swing.
Common Applications
Projection hinges are often used in situations where maximum opening width is crucial, such as:
- Rooms requiring full, unimpeded access.
- Where furniture or equipment needs to pass through doorways easily.
- In commercial or public buildings to meet accessibility requirements.
By positioning the hinge's pivot point outwards, projection hinges effectively "project" the door away from the frame as it opens, ensuring a complete 180-degree swing.
