| 摘要 |
A control device for an automatic door operator 13 includes a highly compact stop assembly employing a plurality of disc-type springs 70 confined within a housing and cooperable with a plunger 71; the assembly being fixed to one of a pair of adjacently disposed rotatable gears in the drive train of an automatic electro-mechanical door operating mechanism. The involved gears are disposed in overlapping relationship is, and the stop assembly is engageable a with the periphery of one of the gears in response to partial rotation of the other whereby to limit their relative rotation and limit door opening operation. The disc-springs are capable of producing impact resistance of a relatively high value and of sufficient magnitude to protect the mechanical drive train from expected overload forces. Adaptation of the disc-spring concept for the door stop permits an extremely compact stop device capable of being mounted within the limited confines of a header mounted or under-the-floor mounted housing for the operator mechanism, thereby satisfying desired esthetic requirements while avoiding operational defects prevalent with heretofore known hydraulic or pneumatic door stops. The door operator 13 is actuated by an electrical drive motor (not shown), initiated by a mat switch 16, through a gear train mechanism. <IMAGE> |
