| 摘要 |
A quick closing device of a door closer for a fire door is provided to function as a door closer and help the fire door to be completely closed in closing the door at the same time and improve external appearance. A quick closing device(10) of a door closer for a fire door comprises a main body(100), a control arm, a rotary arm, a quick door closing member, a connection member, a bush, a coupling screw, a spring, and a roller. The control arm(200) is fixed on a door frame and controls the length in installation by including a length adjusting part. One side of the rotary arm is connected to the front side of the main body, and the other end of the rotary arm is connected to the fire door. The quick door closing member(400) is fitted into a cut groove formed at the front side of the main body. In the connection member, a saw blade engaging with teeth of the quick closing member is formed and a fitting projection is formed to be coupled with the rotary arm. The bush adheres closely to the opposing side of the rapidity waste gate member in which the connecting member goes in gear. The coupling screw(700) passes though the bush, the quick door closing member, the connection member and the rotary arm. The spring(800) is fitted in the compression space prepared at the lower part of the main body. The roller(900) is formed in a holder supported in the spring and adheres closely to the outer circumference of the quick closing member. |
