TUBE MANUFACTURING APPARATUS, AND EXISTING-TUBE RECONDITIONING METHOD USING THE TUBE MANUFACTURING APPARATUS

摘要

In one mode of embodiment, a tube manufacturing apparatus (1) has a shaping frame (2) comprising a plurality of link members (20) having pairs of link members (21 and 22) turnably connected through connecting pins (23). Further comprised are a folded link (30) having connecting members turnably connected to its two ends through the connecting pins (23) thereby to enlarge or reduce the diameter of the shaping frame (2), a drive unit (40) having connecting members (25 and 25) turnably connected to its two ends through the drive pins (23) thereby to feed a band-shaped material (100) forcibly from the inner side, and a joint unit (80) having the connecting members (21 and 22) turnably connected to its two ends through the connecting pins (23) and arranged in a joint portion (120) for the band-shaped member wound.