| 摘要 |
PURPOSE:To extract an inner tube from an outer tube by a claw rod without giving damage by providing a working rod and a rotatable claw rod in a holder movable along the axis of a composite tube, positioning the tip of the claw rod at the axis when the working rod retreats, and making it parallel to the axis when the working rod advances. CONSTITUTION:A projection (c) for engagement is provided near the end of inner face of an inner tube (b). Outer face of an outer tube (a) is held by pressing, and the working rod 9 of an extracting device is positioned on the extension line of the axis of the inner tube (b). Then, the working rod 9 is brought to the state of retreat by an operation lever 11. A holder 2 is advanced, and when the claw 16 of claw rod 13 enters from the open end of the inner tube (b) and passes the projection (c) for engagement, the advance of the holder 2 is stopped. When the working rod 9 is made to the state of advance by the operation lever 11, the claw rod 13 becomes parallel to the working rod 9 and an engaging stepped part 19 of the claw 16 is engaged with the projection (c) for engagement. When the holder 2 is retreated, the inner tube (b) is moved with the holder 2 and extracted from the outer tube (a). |
