| 摘要 |
PROBLEM TO BE SOLVED: To provide a plate bending machine capable of carrying out quickly holding fixation of a workpiece with a bottom die and a top die and release of the workpiece.SOLUTION: A plate bending machine includes an upper frame 9 provided with a top die 7 and arranged in a freely swinging way on a lower frame 5 provided with a bottom die 3, an eccentric shaft 19 between an upper wall 21U of an auxiliary frame 21 arranged on the upper frame and the upper frame, a clamping force imparting member 13 with its upper end side pivot-connected to the eccentric shaft and its lower end side pivot-connected to the lower frame, a lower adjustment block freely advanceable/retreatable between the eccentric shaft and the upper frame and an upper adjustment block freely advanceable/retreatable between the eccentric shaft and the auxiliary frame and auxiliary adjustment parts 23A and 25A each arranged in the lower adjustment block and the upper adjustment block. In the state that the auxiliary adjustment part of the lower adjustment block advances between the eccentric shaft and the upper frame, the auxiliary adjustment part of the upper adjustment block advances freely between the eccentric shaft and the auxiliary frame. |
