Cloth folding and guiding device of sewing machine

Abstract

A cloth fold-over guide device for sewing machine mounts the cloth W on the lower surface of a planar guide plate in a horizontal posture and guides the feed in a sewing advance direction, a movable guide member for path width change movable upwards so as to automatically increase the vertical width H of a path for the increase of the thickness when the thickness of a lower side cloth part Wu' folded over to the path formed under the guide plate is larger than normal thickness is supported through sponge-like rubber. With the structure of the invention, the sewing of stable sewing finish can be performed without generating the loose movement of cloth no matter which one of a thick cloth part and a thin cloth part passes through the path, and the cloth can be surely guided in a prescribed folding state.

Description

technical field [0001] The present invention relates to a cloth folding guide device for a sewing machine, in particular, to a cloth folding guide device for a sewing machine, which is structured as follows: the front and rear parts of clothes such as T-shirts or underwear are previously sewn together to form a cylindrical shape (Japanese : Pill-shaped) sewing fabric for edge flanging (裂引き いする), fold the end of the cylindrical sewing fabric to the lower side at the front of the needle drop, and keep the folded lower fabric part and upper fabric part in the specified folded state. The conveyance that reaches the needle drop section is guided. Background technique [0002] The cloth folding guide device of the sewing machine generally used in the prior art is constituted as shown in Fig. 5 and Fig. 6 . That is, it has: a flat plate-shaped guide plate 1, which is provided in front of the needle drop portion (not shown) of the sewing machine, placed in a horizontal posture wi...

AI Technical Summary

Problems solved by technology

When using the cloth folding guide device of the existing sewing machine with the above-mentioned structure to make the edge flanging of the cylindrical sewing cloth with such a thicker step part in the local part, the pre-existing step part will not be set. The lower cloth part Wu', which is set to have a larger thickness, is enough to be fixed by the size of the channel width H, that is, the channel width H shown in FIG. When the thinner lower cloth portion Wu of the stepped portion passes through the passage 3, the passage width H relative to the thickness t of the cloth W is too large, so the lower cloth portion Wu moves up and down or left and right, causing the sewn part to come off. Phenomena such as lines or wrinkles, and the disadvantage of unstable sewing results

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