Pulling device of sewing machine

Abstract

The invention provides a pulling device of a sewing machine, which can make the sewing machine run stably at high speed. In the pulling device (100) with the clutch sleeve (53a, 53b) and the spacer (54) of the built-in one-way overrunning clutch, on the opposite end faces of the clutch sleeve (53a) and the spacer (54), respectively Two first thrust plates (56a, 56b) made of phosphor bronze are provided, and one second thrust plate (57) made of steel is provided between the two first thrust plates. Each first thrust plate is respectively engaged with the opposite end surfaces of the clutch sleeve (53a) and the spacer member, and can rotate integrally with them in the direction around the axis. In addition, an oil supply path (55) is formed on the clutch sleeve (53a), and through holes are formed on each of the first thrust plate and the second thrust plate. Guide grooves (A, B, C) for guiding grease are provided on the end surface of the second thrust plate, and grease can be supplied from the oil supply path.

Description

technical field [0001] The invention relates to a pulling device for a sewing machine. Background technique [0002] In the pulling device of the sewing machine that applies a pulling force toward the downstream side of the cloth feeding direction to the sewn object such as cloth, the upper and lower sides of the sewing position in the cloth feeding direction, that is, the downstream side of the needle drop position are arranged to face each other up and down. At least one of the roller and the lower roller rotates as a drive wheel, so that the cloth held between the gap between the two is sequentially conveyed to the downstream side. Also, a known pulling device of a sewing machine is equipped with an upper roller incorporating a clutch mechanism that converts the swing motion of the arm obtained from the main shaft rotated by the sewing machine motor via a cam mechanism or a link mechanism into one direction. intermittent rotary motion (for example, refer to Patent Docume...

AI Technical Summary

Problems solved by technology

Therefore, when the high-speed operation is stopped or the like, the thrust plate and the clutch spacer slide on the contact surface, and heat may be generated on the contact surface on the clutch sleeve side made of an aluminum-based material with low wear resistance. There is a problem that the stability of the sewing machine operation or the durability of the device cannot be guaranteed due to the fear of wear and tear.

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