Hangar Door

How It Works - Bifold Hangar Doors

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Developments in new technologies, agricultural machinery, bigger and bigger storage buildings are constructed, hangars, which needs to close entry-exit gates, to protect property from the weather conditions. Whatever that is, hangar for the industry, building for agricultural machinery or any other commercial project. Decision is clear – BIFOLD Hangar doors.

Basic structural and functional components of the hangar doors:

  • Leaf frame (1)
  • Hinges (2)
  • Side door locks (3)
  • Truss (4)
  • Bearing mounting plates with bearing placing section (5)
  • Lifting belts and rolling drums (6)
  • Shaft (7)
  • Electromechanical transmission (8)
  • Supporting bearing (9)
  • The control unit (10)
  • On-off switch (11)
  • The safety and warning devices;
  • Panel – heat insulation (12)

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Door operation principle
Folding metal door structure is raised by a special polyester lifting belts (each one's breaking point is 10,000 kg). Lifting belts at the bottom of the door are wrapped on the drum in several places evenly over the entire frame of the gate, that gates would open evenly and easy. Belts never entangles, nor makes noise, nor rust (as opposed to of steel cables). Door lifting belts are perhaps the most important advantage, because you don't need pulleys - less parts, less problems, less maintenance! Lifting belts are made of polyester material, so it is durable and reliable.

Door opening
While holding the door on-off switch, which is located on the control unit, electromechanical drives turns shaft and at the same time belts attached to drums begins to raise the gates. Side locks, mounted on a door frame on both sides, unbraces the gates and they start to rise. Gate rises to the top with the help of lifting straps and the upper end rigidly attached to the upper lintel. When doors reaches the predetermined height of the opening disconnectors on the electromechanical drives stops them.
Lifting speed – 0,08 m/s.

Door closure
While holding the door on-off switch, which is located on the control unit, electromechanical drive loosens shaft, cables became loose and lifting belts allows the doors to move slowly downward. After  landing, side locks presses and fixates doors to the building , thereby ensuring the security and stability of the gate.
Whole doors perimeter is sealed with rubber. Because of the dense, doubled rubber seal with the cloth inside, doors becomes resistant to any weather conditions!
The chain drive motor located in the aid, in case of power failure or breakdown of the door electromechanical actuators can lift or lower doors manually. For such situations there is dedicated emergency release lever and emergency lifting chain.
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