| 摘要 |
A door closing apparatus for closing a hinged door in which a door closer is attached to a spring unit which in turn is mounted on the door frame by a bracket. The spring unit has a torsion spring within a housing which rotates on the bracket. One end of the spring is affixed to the housing and the other end of the spring is held from rotating by a ratchet type mechanism. The ratchet mechanism may be rotated to adjust the spring. The door closer is capable of adjustment by rotating the closer cylinder. In order to rotate the cylinder, it must be disconnected from the door. A stop on the bracket engages an abutment on the housing to prevent the closer from snapping back when it is disconnected from the door. The stop and abutment are also of assistance when adjusting the tension of the spring on the housing. |
