| 摘要 |
PROBLEM TO BE SOLVED: To enable a tube joining even in a narrow place by using a clamp cylinder and forcibly driving plural heads provided at both central parts of an internal clamp and on the external circumference parts. SOLUTION: Clamps 30, are formed into the same shape and arranged oppositely and symmetrically, on each external circumference part, either of three circular-arc clamp heads 31 constituted by dividing a circular-cylinder body into three bodies in the peripheral direction is supported freely movable in the radius direction. A slider 23 supported movable in the direction of center line at the central part of the clamp 30 is driven back and forth by a clamp cylinder 36 fixed to the central part of the clamp 30. Three clamp heads 31 are connected to the slider 32 with a lever 33. One end part of the lever 33 is connected to the clamp head 31 with a pin 34, and another end thereof is connected to the slider 32 with a pin 35. Therefore, three clamp heads 31 are driven back and forth synchronously with the radius direction by a clamp cylinder 36. |
