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A platform for research: civil engineering, architecture and urbanism
Door closer for normally-open fireproof door
The invention discloses a door closer for a normally-open fireproof door. According to the technical scheme, the door closer is characterized in that a vertical plate on an installation frame is hinged to a pawl, the pawl is connected with a transmission mechanism, and a control mechanism is arranged above the transmission mechanism; one end of a pull rod is hinged to the pawl, the other end of the pull rod is sleeved with a compression spring, one end of the compression spring abuts against the pull rod, and the other end of the compression spring abuts against a fixing seat; one end of a swing rod extends upwards to form a swing part, a reset spring is arranged between the swing part and the control mechanism, when the control mechanism drives the swing rod to swing, a bucking part of the swing rod swings downwards to disengage from a notch, the pull rod can slide forwards under the action of the compression spring, and therefore the pawl is driven to rotate relative to the pawl and disengage from a ratchet wheel. According to the door closer for the normally-open fireproof door, the elasticity potential energy of the compression spring can be directly transmitted to the pawl simply through one part of the pull rod, the elastic potential energy conversion efficiency of the compression spring is improved, the structure is simple, the manufacturing cost is lowered, and meanwhile operation is convenient.
Door closer for normally-open fireproof door
The invention discloses a door closer for a normally-open fireproof door. According to the technical scheme, the door closer is characterized in that a vertical plate on an installation frame is hinged to a pawl, the pawl is connected with a transmission mechanism, and a control mechanism is arranged above the transmission mechanism; one end of a pull rod is hinged to the pawl, the other end of the pull rod is sleeved with a compression spring, one end of the compression spring abuts against the pull rod, and the other end of the compression spring abuts against a fixing seat; one end of a swing rod extends upwards to form a swing part, a reset spring is arranged between the swing part and the control mechanism, when the control mechanism drives the swing rod to swing, a bucking part of the swing rod swings downwards to disengage from a notch, the pull rod can slide forwards under the action of the compression spring, and therefore the pawl is driven to rotate relative to the pawl and disengage from a ratchet wheel. According to the door closer for the normally-open fireproof door, the elasticity potential energy of the compression spring can be directly transmitted to the pawl simply through one part of the pull rod, the elastic potential energy conversion efficiency of the compression spring is improved, the structure is simple, the manufacturing cost is lowered, and meanwhile operation is convenient.
Door closer for normally-open fireproof door
LI ZHONGSHENG (author) / GAN XIANHU (author) / XU JIANFEI (author) / CHEN XIAOYONG (author) / XU JIANRU (author)
2015-07-22
Patent
Electronic Resource
English
IPC:
E05F
DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION
,
Vorrichtungen zum Bewegen der Flügel in die Offen- oder Schließstellung
Normally-open fireproof door self-locking door closer with control device
| European Patent Office | 2021