Patent ID: 7818863

Claim:
A method for mounting an automotive window glass by which a window glass, which is held by a window glass holding member provided at a free end of an altitude-adjustable robot arm, and which is at least curved in a crosswise direction corresponding to a width direction of a body of an automobile, is positioned on a window glass mounting opening provided on the automobile body, and is mounted onto a window glass mounting surface on a circumference of the window glass mounting opening, comprising the steps of: moving the window glass to a position located above the window glass mounting opening according to a mounting position on the window glass mounting surface by driving and controlling the robot arm; irradiating right and left ends of the window glass approximately at a same position as each other at least in the crosswise direction of the window glass with at least one slit laser beam irradiated downward from an upward position at an angle with regard to a perpendicular direction relative to a surface of the window glass held by the window glass holding member across the right and the left ends of the window glass, the window glass mounting surface and a surface of the automobile body at a position which is higher than that of the window glass mounting surface outside the window glass mounting surface; photographing bent laser beams, which are formed, using the at least one slit laser beam irradiated across the right and left ends of the window glass, the window glass mounting surface and the surface of the automobile body, the bent laser beams being formed by clearances in the perpendicular direction relative to the surface of the window glass, the clearances being located between the automobile body and the window glass; calculating, at least, a difference between the clearances, in the perpendicular direction relative to the surface of the window glass, between the right and left ends of the window glass and the surface of the automobile body based on a predetermined processed image generated by image processing of photographed images of the laser beams, and calculating a rotation amount in a rotation direction around the perpendicular direction relative to the surface of the window glass, wherein the rotation amount is required to be adjusted in such a way that the calculated difference between the clearances becomes zero; rotation adjusting the window glass held by the window glass holding member by driving and controlling the robot arm according to the calculated rotation amount; and mounting the window glass, which has been rotation adjusted, onto the window glass mounting surface by pressing the window glass onto the window glass mounting surface in the perpendicular direction to the surface of the window glass.