| 摘要 |
<p>PURPOSE: A suspension device and a suspension system are provided to improve safety by using a safety unit composed to be moved to releasing position manually without additional tools. CONSTITUTION: A suspension device comprises a shaft(2), a roller(3), and a safety unit(4). The shaft is fixed to a carrier(1). The roller comprises a circumferential groove for the latching of a contact component(5) through an inner frictional method. The roller is mounted in the roller to be rotated. The safety unit is composed to be moved manually to a releasing position from a locking position and returned to the locking position automatically.</p> |
