Door opening-and-closing apparatus for vehicle

A door opening-and-closing apparatus for a vehicle, comprising:

• a driving unit adapted to be disposed on a door of the vehicle for opening and closing a door opening formed in a body of the vehicle and having a driving source, a drum, which is rotatably driven by the driving source, and a first cable and a second cable, said cables are wound around the drum, have first and second end portions, respectively, and are configured to be connected to the vehicle body;
• a rotating shaft having a predetermined length and adapted to be fixed to the vehicle door and extend in a vehicle width direction;
• a first pulley supported by the rotating shaft so as to be rotatable thereabout and having a first guide groove, within which one of the first and second cables, which is reeled in and reeled out from the drum, is engaged when said one cable is connected to the vehicle body;
• a second pulley supported by the rotating shaft so as to be rotatable thereabout and arranged in parallel with the first pulley, said second pulley having a second guide groove, within which the other one of the first and second cables, which is reeled in and reeled out from the drum, is engaged when the other cable is connected to the vehicle body;
• and
• an attachment member adapted to be fixed to the vehicle door and supporting the rotating shaft, wherein the first and second pulleys are rotatably disposed on the rotating shaft in a state where the first and second pulleys are placed on one another in an axial direction of the rotating shaft with a predetermined surface of the first pulley facing a predetermined surface of the second pulley;
• and
• a rigid protruding portion being an integral one piece element with one of the first and second pulleys and extending over a contact surface extended line towards the other one of the first and second pulleys in the axial direction, and an annular recessed portion is integrally formed in the other one of the first and second pulleys;
• wherein, when the first and second pulleys are correctly assembled on the rotating shaft, the protruding portion is inserted into the annular recessed portion with a clearance therebetween so that relative rotation between the first and second pulleys is allowed;
• and
• wherein, when the first and second pulleys are not correctly assembly on the rotating shaft, the protruding portion is not inserted into the annular recessed portion and the predetermined length of the rotating shaft is not sufficient to support both the first and second pulleys.