Oil feeding device of sewing machine

Abstract

The present invention provides an oil supply device for a sewing machine capable of stably supplying lubricant. The oil supply device (100) of the sewing machine has: an oil pan (10) as a lubricant storage part for storing lubricant supplied to each part of the sewing machine (200); An oil supply pump (20) as a delivery device for the lubricant in the disc (10); an upper shaft (30) as a rotating shaft for supplying lubricant to its interior by the oil supply pump (20); communicated with the inside of the upper shaft and Lubricant supply channel (40) for oil supply part; lubricant is supplied from upper shaft (30) to first and second oil core members (50a, 50b) of oil supply part by capillary phenomenon. By supplying oil to one end of the first oil core member (50a) from the first discharge hole (33) formed on the upper shaft (30), excessive oil supply when the sewing machine (200) stops can be prevented.

Description

Technical field [0001] The present invention relates to an oil supply device for a sewing machine that supplies lubricant from an oil pan at the bottom of the sewing machine to various parts of the sewing machine. Background technique [0002] In the sewing machine, a mechanism for high-speed sliding of components such as the needle bar and the needle bar arch in the needle up-and-down mechanism is provided, and a lubricating mechanism for supplying lubricant to the sliding portion and the like is provided. [0003] As this lubricating mechanism, there is known a lubricating device for a sewing machine that has a reservoir for storing a lubricant, and an oil wick whose one end is immersed in the lubricant stored in the reservoir to supply lubricant to various parts of the sewing machine (For example, refer to Patent Document 1). In addition, there is also known an oil supply device for a sewing machine that uses a pump that uses a rotating sewing machine spindle or the like as a ...

AI Technical Summary

Problems solved by technology

[0006] However, in the conventional sewing machine oil supply device described in Patent Document 1, there is a problem that, since one end of the oil wick is immersed in the storage portion, even when the sewing machine is in a stopped state, the impregnated The lubricant in the oil core is still supplied from the storage part, so the lubricant supplied to the sliding part is too much and stays at the front end of the machine head above the sewing position. Oil leaks from the machine head to the outside, which may stain the sewing product

[0007] In addition, there is a problem in the sewing machine lubricating device described in the above-mentioned Patent Document 2 that, since the driving source of the pump as the supply device for forcibly supplying the lubricant is linked with the driving of the sewing machine, for example, although such a Sufficient lubricant supply can be maintained when the sewing machine is running at high speed, but when the sewing machine is running at low speed, the supply of lubricant is insufficient, which will lead to overheating and locking of the above-mentioned sliding parts, etc.

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