Oil leakage-proof and dust-proof device of sewing machine

Abstract

The invention relates to a structure, wherein the dust-proof flexible sealing plate is clamped between the cloth feeding table guide element fixed to cover the seamer support and the front cloth feeding table sealing guide element; at the same time. between the front cloth feeding table sealing guide element and the back cloth feeding table sealing guide element, between the back cloth feeding table sealing guide element and the sealing compress cover, the first and second flexible sealing plates are clamped for avoid oil leakage; the lubricant scraped by the first flexible sealing plate from the outer circumference of cloth feeding table is stored in oil storage; the stored lubricant via oil recycle tube is recycled; therefore, the invention can realize the effect of lubricant, to avoid staying scraped lubricant; and realize better dust-proof effect.

Description

(1) Technical field [0001] The present invention relates to an anti-oil and dust-proof device for a sewing machine. In the sewing machine, a motion driving source such as a cloth feeding table for feeding cloth in the sewing machine is arranged inside the sewing machine frame, and there is a swinging cloth feeding table at the same time. The installation part of the cloth teeth protrudes outward through the opening of the sewing machine frame, so that the swing feeding table swings in the front, rear and up and down directions. The lubricating oil scattered from the oil leaks from the above-mentioned opening to the outside along the oscillating cloth feed table to pollute the periphery of the needle plate and the sewing cloth, etc., and prevent external dust such as thread ends from entering the sewing machine frame through the opening. (2) Background technology [0002] In the past, this kind of oil leakage prevention device for sewing machines is known. As described in JP-...

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Problems solved by technology

[0003] Because the existing sewing machine oil leakage preventing device having the above-mentioned structure is such that it utilizes the frictional contact accompanying the relative movement of the inner peripheral edge portions of the fitting holes of the second and first elastic sealing plates and the outer peripheral surface of the swing cloth feeding table in the front-rear direction. The function is to scrape off the lubricating oil attached to the outer peripheral surface of the swing cloth feed table in two steps. In order to fully exert this oil scraping effect, the contact between the inner peripheral edge of the matching hole of the elastic sealing plate and the outer peripheral surface of the swing cloth feed table must be The force (surface pressure) is set to be strong, but the stronger the contact force, the easier it is to wear. With this wear, the contact force decreases, and the effect of scraping oil becomes worse after a certain period of time.

In addition, in the existing oil leakage prevention device, because the scraped lubricating oil naturally flows down through the gap by gravity, the gap is the gap formed between the main body sealing gland and the internal oil-proof wall, which is inherently highly viscous Not only is it difficult for the lubricating oil to flow smoothly to the bottom of the frame without remaining on the elastic sealing plate, but especially, a large amount of lubricating oil should be supplied for continuous sewing work that lasts for a long time, and the lubricating oil that is scraped off will follow. As the amount increases, the natural flow of lubricating oil cannot catch up with the amount of scraping, and a large amount of lubricating oil immediately stays on the first elastic sealing plate. After falling, the lubricating oil leaks from the opening of the frame to the outside, and there is a problem that the expected oil leakage prevention performance cannot be maintained.

[0004] Moreover, in the above-mentioned existing device, because the first elastic sealing plate is arranged on the inner surface of the oil-proof wall main body in an elastically connected state, in addition to the function of scraping off the lubricating oil attached to the outer peripheral surface of the swing cloth feeding table, it also realizes preventing The dust-proof function that the dust outside the frame invades the inside of the frame from the opening, however, the inner peripheral edge of the matching hole of the first elastic sealing plate is easy to wear as described above, and because the scraped lubricating oil is easy to stay, the The dustproof function is damaged in the initial stage, and external dust enters the inside of the frame, and the dust that enters is mixed into the retained lubricating oil, which prevents the natural downflow of lubricating oil and further reduces the sealing performance. In this case, there are oil leakage prevention performance and The problem that the dustproof performance cannot be maintained very stably

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