| 摘要 |
PURPOSE: A door-hanging device of a door closer for fireproofing purpose is provided to reduce the unit cost of a product, to shorten assembling hours by improving assembly efficiency and to prevent the damage by cutting off smoke rapidly and easily. CONSTITUTION: The door-hanging device of a door closer for fireproofing purpose comprises a bearing body(21) having a guide groove(22) and a hanging groove(23), a rotary body(31) having a ball installed elastically by a spring, two control gear bolts(51) fastened to each fitting groove, a center gear(52) attached to the lower end of a bearing-fixing pipe(41), and a geared motor gear(62) attached to a geared motor connected with a smoke sensing-controlling unit, wherein two control gear bolts(51), the center gear(52) and the geared motor gear(62) are engaged to be rotated together. |
