| 摘要 |
PROBLEM TO BE SOLVED: To provide a fail safe structure for an air spring for a loading platform, capable of preventing a cargo from being damaged by minimizing vertical vibration on the floor of the loading platform even if the air spring does not function. SOLUTION: A bypass pipe 13 makes an right side air pipe 11 communicate with a left side air pipe 12. A right side valve 40 and a left side valve 42 of a shielding film protection cock 38 which are installed in the bypass pipe 13 open the bypass pipe 13 so as to be closable. A shielding film 37 which is set between the right side valve 40 and the left side valve 42 of the bypass pipe 13 closes the bypass pipe 13, and is broken when a difference between pipe inner pressure at the right side air pipe 11 side and pipe internal pressure at the left side air pipe 12 side of the bypass pipe 13 exceeds predetermined limit pressure. When the internal pressure at the right side air pipe 11 falls below the predetermined pressure, a stopper 14 which is installed in the right side air pipe 11 moves a rear end of a floor pan 7 from a non-lock position for allowing the vertical movement of the rear end of the floor pan with respect to a lower wall 18 toward a lock position for locking the rear end of the floor pan 7 at the lower wall 18 side. COPYRIGHT: (C)2011,JPO&INPIT |
