| 摘要 |
Disclosed is a rotary shuttle device for a sewing machine, in which an outer shuttle is comprised of three separate constructing elements so that only an excessively worn portion or a portion that requires replacement is selectively replaced. The outer shuttle comprises a main body (32) integrally provided with a base portion (34) which is disposed at the driving shaft, a first supporting portion (36) which is protruded at one side of the base portion (34) to have a first partial track groove (40) on an inner face thereof, and a second supporting portion (38) which is protruded at the other side of the base portion (34) to be opposite to the first supporting portion (36) and have a second partial track groove (42) on an inner face thereof; a track groove member (50) which is removably disposed between the first and second supporting portion (36, 38) and has a third partial track groove (52) communicated with the first partial track groove (40) of the first supporting portion (36) and the second partial track groove (42) of the second supporting portion (38); and a groove member (58) which is removably fixed to the second supporting portion (38) of the main body (32), and formed with a pointed end (66), a groove (64) through which the under thread wound on the bobbin is passed while being contacted therewith and a fourth partial track groove (60) communicated with the second partial track groove (42) of the second supporting portion (38). |
