| 摘要 |
PURPOSE:To make whole constitution compact and low cost and prevent deformation of a work by making lifting up and reversing of a work doubly at a time by a driving source and making time for reversing longer. CONSTITUTION:When a rotation shaft is rotated once, an oscillation arm 10 is oscillated once by link mechanisms 12, 13, and a jaw support member 4 ascends and descends once. As an elliptic cam 22 rotates once at the same time, the first bracket 14 rotates in positive direction by specified angle, and rotates again in direction by the same angle. Accordingly, a jaw for work clamp supported by the support member 4 is reversed by 180 deg. and rotated again by 180 deg. in reverse direction to restore original state. Thus, by setting 180 deg. normal rotation and 180 deg. reverse rotation of the jaw properly against ascent and descent of the support member 4 devising the shape of peripheral face of the elliptic cam 22, the jaw can be reversed while clamping the work as shown by chain lines. |
