| 摘要 |
PURPOSE: To provide a wing drive device having hydraulic cylinders for opening and closing wings, and which can perform emergency opening and closing operation of wings upon failure by providing a hand pump unit in parallel with a motor driven hydraulic pump. CONSTITUTION: A power unit is composed of a motor driven pump 1, a solenoid valve 2, a check valve 3 and a hand pump unit 6 in parallel with the motor driven pump 1. When a handle 6a of the hand pump unit 6 is manipulated by a hand as necessary, oil in a hydraulic circuit is fed toward one side. With this arrangement, when the motor driven pump 1 fails so that the operation of wings in a wing track becomes inoperable, either the left wing or the right wing can be opened and closed by the hand pump unit 6 instead of the motor driven pump 1. For example, by manipulating the hand pump unit while pressing a vertical motion switch attached on a wing group body, the wing can be opened and closed. |
