Importance

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Abstract

An arrangement in a swing door apparatus comprising a door closer provided with a return spring, which door closer comprises a body part and inside it a movable piston member, which is in force transmitting connection with a driving shaft, which is turned in accordance with the movements of the door, and an actuator, for instance an electric motor, the operating shaft of which may be in operative connection with said piston means for providing the opening movement of the door by utilizing a worm shaft, one end of which is driven by a drive nut connected to the piston member and the other end may be connected to said operating shaft of the actuator. The worm shaft comprises a worm section and a shaft section integrated thereto and provided with a flange member, which is in cooperation with a thrust bearing unit so that the moving of the worm shaft in the axial direction with respect to the body part of the door closer is prevented. Coupling means are arranged between the operating shaft of the actuator and the shaft section of the worm shaft, which coupling means are arranged to disconnect the force transmitting connection between the actuator and the shaft section of the worm shaft and to provide said force transmitting connection for accomplishing the opening movement of the door.

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First Claim