Patent ID: 8256244

Claim:
A method for bending a glass sheet, comprising: a forming step which includes placing a glass sheet softened by heating between a forming support frame and a forming surface of a forming mold, and pressing the glass sheet with the forming support frame and the forming surface of the forming mold to bend the glass sheet in a predetermined curved shape; and a transferring step which includes holding the glass sheet of the predetermined curved shape on a forming mold and transferring the glass sheet from the forming mold to a conveyance support frame configured to support an edge portion of the glass sheet to convey to a next step, wherein the forming step and the transferring step are performed inside a furnace, the forming step includes correcting a forming position including correcting a displacement of a press position with respect to the forming support frame and the forming mold by moving the position of the forming mold at the time of pressing the glass sheet with the forming support frame and the forming mold inside the furnace, the transferring step includes correcting a transfer position including correcting a displacement of a transfer position of the glass sheet with respect to the forming mold and the conveyance support frame by moving the position of the forming mold at the time of transferring the glass sheet of a predetermined curved shape onto the conveyance support frame inside the furnace, the correcting a forming position includes retrieving the press position with respect to the forming support frame and the forming mold, memorized in a first memory device, to correct the position of the forming mold and detecting newly a displacement of press position thereby renewing the press position memorized in the first memory device, the correcting a transfer position includes retrieving the transfer position of the glass sheet with respect to the forming mold and the conveyance support frame, memorized in a second memory device, to correct the position of the forming mold and detecting newly a displacement of transfer position thereby renewing the transfer position memorized in the second memory device, the detecting newly a displacement includes detecting a displacement based on a position of a movable plate with respect to a flange, the movable plate being movable with respect to the flange while the movable plate is suspended from the flange in an unlocked state, and the correcting a forming position includes moving the forming mold to cancel the displacement detected based on the position of the movable plate and setting the forming position by fixing the movable plate to the flange at the position.