| 摘要 |
A storage (3) is liftably installed on a cabinet support frame (2). A base section (11) is installed on the cabinet support frame (2) so as to be vertically movable by being driven by a motor (6). Sensor means (19) is provided between the base section (11) and the storage (3). The sensor means (19) detects the position, relative to the base section (11), of the storage (3). When the value detected is largely different from a value detected before the start of motor drive, the sensor means recognizes the storage (3) is in collision with an obstacle, and the motor (6) is stopped driving.
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