Sliding door

A sliding door comprising:

• a door body;
• bracket assemblies each including a first bracket on which a rolling wheel is rotatably supported and a second bracket arranged at a predetermined inclination angle and provided at an upper end thereof with an elastic suspension including an extensible rod, said first and second brackets being connected to each other through said extensible rod of said elastic suspension;
• said second bracket being mounted at a lower portion thereof on an upper portion of said door body;
• a rail including an upper rail surface and a lower rail surface and horizontally rigidly arranged above an entrance of an object to be operated by said sliding door;
• said lower rail surface of said rail being slanted at the same angle as said second bracket;
• said rolling wheel being carried on said upper rail surface of said rail, resulting in said door body being suspended by means of upward elastic force of said elastic suspension while being kept raised from a floor on which said object is installed;
• and
• a third bracket which is fixed at a lower portion thereof on an upper end of said door body and on which a driving wheel is rotatably supported while being slanted at the same angle as said bracket;
• said driving wheel being pressedly abutted against said lower rail surface by means of the upward elastic force of said elastic suspension;
• said lower rail surface of said rail being formed on a position thereof rendered opposite to said driving wheel of said door body when said door body is moved to the closing position with a tapered section on which said driving wheel strikes to extend said extensible rod against the upward elastic force of said elastic suspension, resulting in said door body being obliquely inward downward moved forcibly.