Patent ID: 7097002

Claim:
An elevator door drive device for opening and closing at least one car door leaf and a corresponding shaft door leaf, comprising: a coupling mechanism mounted at the car door leaf for transmitting the movement of the car door leaf to the shaft door leaf, said coupling mechanism including two entraining runners oriented parallel to a travel direction of the elevator car and mounted on adjusting means, said adjusting means being pivotable in opposite directions about a pivot axis for adjusting spacing between said entraining runners, said entraining runners acting on at least one coupling element arranged at the shaft door leaf; a drive unit transmitting closing and opening movements to the car door leaf by way of a linearly acting drive means, said drive means engaging the car door leaf through said coupling mechanism to lead said entraining runners to engage the at least one coupling element before the start of the door leaf opening movement and moving said entraining runners back to a setting spaced from the at least one coupling element after an end of the door leaf closing movement, wherein said adjusting means has a groove that is radially spaced from said pivot axis, and including a detent lug on a catch and being complementary with said groove to temporarily block a pivot movement of said adjusting means in both of the pivot directions; and wherein the car and the shaft have doors with at least two centrally closing door leaves and including two of said coupling mechanisms each mounted at a respective one of the car door leaves, a catch abutment arranged between said catches of said two coupling mechanisms, said catch abutment being displaceable in a movement direction of the two door leaves, said catch abutment moving by a respective one of two ends a respective one of said two catches away from an engagement position with a corresponding one of said adjusting means.