| 摘要 |
PURPOSE: A national flag hoisting device is provided to enable a hoist operator to easily hoist a national flag to a high position. CONSTITUTION: A national flag hoisting device comprises a base plate(10), a guide rail, a sliding cover(30), a shaft connection rod(40), and a spiral spring device. The base plate is installed in the longitudinal direction of a structure. The guide rail is formed on the base plate along the longitudinal direction thereof. The sliding cover receives the guide of the guide rail and slides vertically. The shaft connection rod is formed on the sliding cover and moves vertically with the sliding cover. The spiral spring device is formed on the upper part of the sliding cover and applies elastic restoring force on the sliding cover. |
