JP4547672B2 - Oil leakage prevention and dustproof device for sewing machine - Google Patents

Description

  In the present invention, like a cloth feed base in a sewing machine, the motion drive source is arranged inside the sewing machine frame, while the feed dog mounting portion is arranged so as to protrude outside through the opening of the sewing machine frame. In addition, in a sewing machine provided with a swing feed base that swings in the vertical direction, the lubricating oil splashed with oiling in the sewing machine frame leaks to the outside through the swing feed base and around the needle plate The present invention relates to an oil leakage prevention and dustproof device for a sewing machine that stains a part, a sewing cloth, and the like, and prevents external dust such as lint from entering the sewing machine frame through the opening.

  As an oil leakage prevention device of this kind of machine, conventionally, an oil barrier main body, which is fixed to the sewing machine frame so as to cover the opening of the sewing machine frame and has a window that allows the rocking displacement of the rocking feed base, A first elastic seal plate that is disposed on the inner surface side of the oil barrier body and has a fitting hole into which the swing feed base is fitted, and a state in which the swing feed base and the first elastic seal plate are allowed to move vertically. A main body seal presser for holding the first elastic seal plate between the oil barrier wall main body and a window for allowing the rocking displacement of the swing feed base are formed, and a predetermined gap is formed between the main body seal presser. An internal oil barrier fixed to the oil barrier main body in a state having a gap, a second elastic seal plate having a fitting hole into which the swing feed base is fitted, a swing feed base and a second elastic seal plate The second elastic seal plate is placed between the inner oil barrier and the vertical movement displacement of the second oil seal plate. When the swing feed base swings back and forth, the lubricating oil adhering to the outer peripheral surface of the swing feed base is first scraped off by the second elastic seal plate. The remaining lubricating oil is scraped off by the first elastic seal plate, and the scraped lubricating oil is naturally dropped down to the inside of the frame by gravity through a gap formed between the main body seal presser and the internal oil barrier ( It is known that the lubricating oil is prevented from staying in the first elastic sealing plate by flowing down, and as a result, the lubricating oil is prevented from leaking from the opening of the frame. (For example, refer to Patent Document 1).

  JP 2003-181186 A

  The conventional oil leakage prevention device for a sewing machine having the above-described structure is configured to feed the lubricating oil adhering to the outer peripheral surface of the swing feed base to the inner peripheral edge portions of the fitting holes of the second and first elastic seal plates and swing feed. Since it is scraped off in two stages by the sliding contact action with the relative movement in the front-rear direction with the outer peripheral surface of the base, the inner peripheral edge of the fitting hole of the elastic seal plate is used in order to fully exhibit the oil scraping action. The contact force (surface pressure) between the head and the outer periphery of the oscillating feed base must be set stronger. However, the stronger the contact force, the more likely it is to wear, and the contact force decreases with the wear. The scraping action of this will deteriorate over time. In addition, in the conventional oil leakage prevention device, the lubricating oil that has been scraped off is allowed to naturally flow down by gravity through a gap called a gap formed between the main body seal presser and the internal oil barrier, Not only is it difficult to let the highly viscous lubricating oil flow down smoothly in the frame without being stuck to the elastic seal plate, but in particular, a large amount of oil is supplied corresponding to continuous sewing work over a long period of time. If the amount of lubricating oil scraped off increases, the amount of natural flowing lubricant will not catch up with the amount of scraping, and more lubricant will gradually accumulate in the first elastic seal plate. There is a problem in that the sealing performance decreases over time during continuous sewing work, and the lubricating oil leaks out from the opening of the frame and cannot maintain the expected oil leakage prevention performance.

  Further, in the above conventional apparatus, the first elastic seal plate is provided in a state of elastic contact with the inner surface of the oil barrier main body, so that the function of scraping off the lubricating oil adhering to the outer peripheral surface of the swing feed base is provided. In addition, it also functions to prevent dust outside the frame from entering the inside of the frame from the opening, but the inner peripheral edge of the fitting hole of the first elastic seal plate is easily damaged as described above. In addition, since the scraped lubricant is likely to stay, the dust-proof function is impaired early, and external dust enters the frame, and the intruded dust enters the retained lubricant. As a result, there is a problem that both the oil leakage prevention performance and the dustproof performance cannot be stably maintained, such that the natural flow of the lubricating oil is hindered and the sealing performance is further reduced.

  The present invention has been made in view of the above-mentioned circumstances, and always exerts the scraping action of the lubricating oil surely and satisfactorily, prevents the accumulation of the scraping lubricating oil, and prevents the dust from being mixed into the lubricating oil. Another object of the present invention is to provide a sewing machine oil leakage prevention and dust prevention device capable of stably maintaining the desired oil leakage prevention performance and dust prevention performance for a long period of time even for continuous sewing work over a long period of time.

In order to achieve the above object, the oil leakage prevention and dustproof device for a sewing machine according to the present invention is attached to an opening of a sewing machine frame through which a swing feed base supported so as to be swingable in the front-rear and vertical directions is inserted. Preventing leakage of lubricating oil splashed as a result of refueling in the sewing machine frame from the opening and preventing external dust from entering the sewing machine frame through the opening; and A dustproof device, which is fixed to a sewing machine frame so as to cover the opening, has a feed base guide support that is formed with a window that allows the rocking displacement of the rocking feed base, and an inner surface side of the feed base guide support. The dust-proof elastic seal plate having a fitting hole into which the swing feed base is disposed, and the dust-proof elastic seal plate are sandwiched between the feed base guide support and the swing A front feed base seal guide that allows vertical movement displacement of the frame and the dustproof elastic seal plate and a window that allows rocking displacement of the swing feed base are formed between the front feed base seal guide and the front feed base seal guide. A rear feed base seal guide which is fixed to the feed base guide support by sandwiching a first elastic seal plate for preventing oil leakage on the inner side of the rear feed base seal guide, A second elastic seal plate for oil leakage prevention having a fitting hole for fitting, and the second elastic seal plate is sandwiched between the rear feed base seal guide, and the swing feed base and the oil leak prevention A seal presser that allows vertical displacement of the second elastic seal plate, and the front feed base seal guide and the rear feed arranged so as to sandwich the first elastic seal plate for preventing oil leakage Between the lower ends of the base seal guide, the first bullet An oil sump portion is formed that can store lubricating oil that is scraped off from the swing feed base by the seal plate, and the oil sump portion is connected to a pump and disposed in the sewing machine frame. The one end suction port is open-connected, and the lubricating oil stored in the oil reservoir is forcibly recovered at a predetermined location through an oil recovery pipe .

  According to the present invention having the above-described characteristic configuration, the lubricating oil adhering to the outer peripheral surface of the rocking feed base is not only scraped in order by the second and first elastic seal plates, but also by the scraping. It is possible to finally scrape off a small amount of lubricating oil remaining on the outer peripheral surface of the moving platform with the elastic seal plate for dust prevention. It is possible to reliably prevent the lubricating oil from leaking out. Moreover, the lubricating oil scraped off by the first elastic seal plate is immediately stored in the oil reservoir through the forced suction force of the pump, and the oil is forcedly recovered from the oil reservoir to a predetermined location through the oil recovery pipe. Therefore, even if a large amount of oil is supplied in response to continuous sewing work over a long period of time and the amount of highly viscous lubricating oil that is scraped off is high, the scraped A large amount of lubricating oil is always reliably and smoothly forcibly recovered to prevent the lubricating oil from staying on the first elastic seal plate, which ensures high sealing performance even during long continuous sewing operations. Can be secured.

  In addition, the window of the feed guide support fixed to the sewing machine frame so as to cover the opening of the sewing machine frame is closed with a dustproof elastic sealing plate, so that dust such as lint generated outside the sewing machine frame is opened. It is possible to prevent intrusion into the sewing machine frame through. In particular, the amount of oil scraped off by the elastic seal plate for dust protection is very small, and the deterioration of the dustproof function due to the retention of lubricating oil on this seal plate is very small. As a result, the dust is mixed into the lubricating oil and forced recovery is hindered, or the dust-proof elastic seal plate and the first elastic seal plate for preventing oil leakage are abnormally worn. It is also possible to suppress the oil leakage and to maintain the desired oil leakage prevention performance stably. In addition, the lubricating oil scraped off by the first elastic seal plate can be stored in the oil reservoir, and the stored lubricating oil can be forcibly recovered at a predetermined location through a predetermined passage called an oil recovery pipe. Like when dropping the dropped lubricating oil along the inner surface of the sewing machine frame by gravity, the parts inside the sewing machine frame will not be soiled with oil or excessively supplied to these parts. In addition to the oil leakage prevention performance and dustproof performance, it is possible to achieve an improvement in proper lubrication performance.

In the above-described sewing machine oil leakage prevention and dustproof device according to the present invention, as described in claim 2, one end suction port of the oil recovery pipe is formed near the lower end portion of the front feed base seal guide. and through holes and the lubricating oil stored in the feed bar guide the oil reservoir are opened connected to the oil reservoir through the through-hole formed and the machine frame which is formed on oil recovery through-slot to support The structure for forced recovery of the lubricating oil can be simplified by including the forced recovery structure by being configured to forcibly recover to a predetermined location through each through hole, through long hole and oil recovery pipe. Thus, when assembling a plurality of components, special considerations such as devising the assembling order are unnecessary, and the entire apparatus can be easily assembled.

  Moreover, in the oil leakage prevention and dustproof device of the sewing machine according to the present invention, as the seal retainer according to claim 3, the seal presser is also used by a feed guide which is divided into left and right parts and incorporated in the sewing machine frame. Therefore, the feed guide having the function of positioning the left and right positions of the swing feed base can also have a function of holding the second elastic seal plate for preventing oil leakage at a predetermined position and reducing the number of members. Can be further simplified.

  Furthermore, in the oil leakage prevention and dustproof device for a sewing machine according to the present invention, as described in claim 4, when at least the first elastic seal plate is moved downward in the oil reservoir, the first elastic seal By adopting a structure that retains an oil-absorbing porous member that absorbs the lubricating oil scraped off from the swing feed base upon contact with the plate by capillary action, the lubricating oil scraped off by the first elastic seal plate is retained in the oil-absorbing porous body. By sucking immediately by capillary action due to the material member and leading to forced recovery, the scraped lubricating oil stays in the first elastic seal plate, and the staying amount increases every time the swinging movement of the swing feed base increases the sealing performance. Can be prevented from rapidly deteriorating, whereby the expected oil leakage prevention effect and further the dust prevention effect can be further improved.

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view of a main part showing a state in which an oil leakage prevention and dustproof device according to the present invention is incorporated in a bed part of an overlock sewing machine, FIG. 2 is an exploded perspective view of the main part, and FIG. It is an enlarged vertical side view.

  In each of these drawings, reference numeral 1 denotes a sewing machine frame constituting a bed portion, and an opening 2 is formed in a front surface portion 1 a of the sewing machine frame 1. Inside the sewing machine frame 1, a pair of front and rear swing feed bases 3 and 4 for a cloth feeding device are supported so as to swing back and forth and up and down. The front end portions 3a and 4a of 4 are inserted through the opening 2 and protrude to the outside of the sewing machine frame 1, and front and rear feed teeth (not shown) are attached to the protruding front end portions 3a and 4a. . The pair of front and rear swing feed bases 3 and 4 swings back and forth and up and down as shown by arrows X in FIG. 3 to perform a predetermined cloth feed operation by the feed dog. Since the drive mechanism of the feed bases 3 and 4 is conventionally known, illustration and description are omitted.

  The opening 2 of the sewing machine frame 1 prevents the lubricating oil scattered in the sewing machine frame 1 due to oil supply to various sliding parts and the like from leaking to the outside from the opening 2. An oil leakage prevention and dustproof device 5 for preventing dust such as yarn waste generated outside from entering the sewing machine frame 1 through the opening 2 is provided.

  This oil leakage prevention and dustproof device 5 is fixed to the front surface portion 1a of the sewing machine frame 1 via a screw 6 so as to cover the opening 2, and allows the rocking displacement of the rocking feed bases 3 and 4 to be swung. A dust guide elastic seal plate 8 having a feed base guide support 7 formed with a window 7a and a fitting hole 8a which is disposed on the inner surface side of the feed base guide support 7 and into which the swing feed bases 3 and 4 are fitted. And a window 10a for holding the rocking feed bases 3 and 4 and the dust-proof elastic seal plate 8 up and down. A front feed base seal guide 10 fixed to the feed base guide support 7 via the screw 9 and the screw 15 and a window 11a for allowing the swing displacement of the feed of the swing feed bases 3 and 4 are formed. And the front feed base seal guide 10 The feed base guide support 7 and the front feed are interposed via the screw 9 and the screw 15 with the first elastic seal plate 12 for preventing oil leakage having a fitting hole 12a into which the feed bases 3 and 4 are fitted. Leakage having a rear feed base seal guide 11 fixed to the base seal guide 10 and a fitting hole 13a which is disposed on the inner surface side of the rear feed base seal guide 11 and into which the swing feed bases 3 and 4 are fitted. The second elastic seal plate 13 for preventing oil and the second elastic seal plate 13 are sandwiched between the rear feed base seal guide 11 and the swing feed bases 3 and 4 and the second elastic seal plate 13 are It comprises a seal presser 14 that has a window 14a that allows vertical displacement and is fixed to the feed guide support 7 via the screw 9.

  The seal presser 14 is divided into left and right parts and is installed in the sewing machine frame 1, and is attached to the feed base guide support 7, the front feed base seal guide 10, and the rear feed base seal guide 11 via the screws 9. The pair of left and right feed base guides 14A and 14B are fixed. The dust-proof elastic seal plate 8 and the first and second elastic seal plates 12 and 13 for preventing oil leakage are made of various rubber materials having excellent oil resistance and elastic characteristics. In the embodiment, two sheets are laminated, but a single sheet may be used.

  A peripheral wall 16 that abuts on the peripheral edge of the rear end of the front feed base seal guide 10 is integrally formed on the peripheral edge of the front end of the rear feed base seal guide 11 so as to prevent oil leakage. An oil sump 17 that can store the lubricating oil scraped off from the swing feed bases 3 and 4 by the first elastic seal plate 12 is formed. The oil sump 17 is connected to the sewing machine frame 1 through a through hole 18 formed near the lower end of the front feed base seal guide 10 and an oil recovery through hole 19 formed in the feed base guide support 7. Is connected to a through long hole 20 formed in the front surface portion 1a. One end suction port 21a of an oil recovery pipe 21 connected to a pump (not shown) and disposed inside the sewing machine frame 1 is connected to the inside of the lower end of the through long hole 20 so that the oil reservoir part As shown by the arrows in FIG. 3, for example, an oil pan (not shown) that contains the lubricating oil through the through holes 18 and 19, the through long holes 20, and the oil recovery pipe 21. ) It is configured to forcibly collect at a predetermined location such as inside. In FIG. 3, reference numeral 23 denotes a through long hole 20 formed in the front surface portion 1 a of the sewing machine frame 1 among the oil recovery through holes 19 formed so as to penetrate the lower end of the feed base guide support 7. The plug 23 is packed and fixed in an unnecessary hole located below the communication connection point, and the plug 23 is formed of a metal such as a copper bar or a resin that does not absorb oil. .

Next, the operation of the overlock sewing machine provided with the oil leakage prevention and dustproof device 5 having the above configuration will be described.
As the sewing machine rotates, the pair of front and rear swing feed bases 3 and 4 swing back and forth and up and down as indicated by arrows X in FIG. A predetermined cloth feed operation is performed by front and rear feed dogs (not shown) attached to 3a and 4a. At this time, the lubricating oil scattered with the oil supply inside the sewing machine frame 1 is attached to the outer peripheral surfaces of the swing feed bases 3 and 4.

  The lubricating oil adhering to the outer peripheral surfaces of the oscillating feed bases 3 and 4 in this way is fitted to the second elastic seal plate 13 when the oscillating feed bases 3 and 4 are oscillated forward. While being scraped off by sliding on the inner peripheral edge of the joint hole 13a, the majority is scraped off by sliding on the inner peripheral edge of the fitting hole 12a of the first elastic seal plate 12. Further, a small amount of the lubricating oil remaining on the outer peripheral surface of the swing feed bases 3 and 4 due to these two stages of scraping finally also reaches the inner peripheral edge of the fitting hole 8a of the dustproof elastic seal plate 8. Since it will be scraped and scraped off, it will exhibit a high ability to scrape the lubricating oil as a whole, and reliably prevent the lubricating oil from leaking from the opening 2 of the front portion 1a of the sewing machine frame 1 to the outside of the sewing machine frame 1. can do.

  The lubricating oil scraped off by the second elastic seal plate 13 naturally flows down to the lower inside of the sewing machine frame 1 by gravity, while most of the lubricating oil scraped off by the first elastic seal plate 12 is oil. After being immediately stored in the reservoir 17, through the through holes 18 and 19, the through long holes 20, and the oil recovery pipe 21 in which the forced suction force by the pump is working, for example, in an oil pan containing lubricating oil or the like Since it will be forcibly collected at a predetermined location, even if a large amount of oil is supplied corresponding to continuous sewing work over a long period of time and the amount of highly viscous lubricating oil scraped off along with it is large, A large amount of the lubricating oil scraped off is always reliably and smoothly recovered to prevent the lubricating oil from staying in the first elastic seal plate 12, thereby achieving high sealing performance even during continuous sewing work over a long period of time. It can be ensured.

  Further, since the window 7a of the feed guide support 7 fixed to the sewing machine frame 1 so as to cover the opening 2 of the sewing machine frame 1 is closed by the dustproof elastic seal plate 8, it is generated outside the sewing machine frame 1. It is possible to prevent dust such as lint from entering the inside of the sewing machine frame 1 through the opening 2. In particular, the amount of oil scraped off by the dustproof elastic seal plate 8 is very small, and the dustproof function is hardly deteriorated due to the retention of lubricating oil on the seal plate 8. The performance can be stably maintained. As a result, the dust is mixed into the lubricating oil to obstruct forced recovery, or the dustproof elastic seal plate 8 and the first elastic seal plate 12 for preventing oil leakage are abnormal. It is also possible to suppress wear and maintain the desired oil leakage prevention performance stably.

  In addition, after the lubricating oil scraped off by the first elastic seal plate 12 for preventing oil leakage is stored in the oil reservoir 17, the through holes 18 and 19, the through long holes 20, and the oil recovery pipe 21 are determined. Since it is forcibly collected at a predetermined location through the passage, parts inside the sewing machine frame 1 will not be soiled with oil or excessively lubricated to these parts. In addition to performance, proper lubrication performance can be maintained.

  Furthermore, in the first embodiment, as the seal presser 14 in the oil leakage prevention and dustproof device 5, since it is shared by the feed base guides 14 </ b> A and 14 </ b> B that are divided into left and right and incorporated in the sewing machine frame 1, The seal presser 14 can serve both as a function for positioning the left and right positions of the swing feed bases 3 and 4 and a function for holding the second elastic seal plate 13 for preventing oil leakage at a predetermined position. As compared with the case where the feed guides are provided separately, the number of members can be reduced and the structure can be further simplified.

  FIG. 4 shows a second embodiment of the present invention, and is an enlarged vertical side view of the oil leakage prevention and dustproof device 5 according to the present invention incorporated in the sewing machine frame 1. In this embodiment, the front and rear seal guides 10, 10 are formed by bringing a peripheral wall 16 integrally formed from the front edge of the rear feed base seal guide 11 into contact with the rear edge of the front feed base seal guide 10. 11 is connected to a pump (not shown) and is connected to a pump (not shown), and one end suction port 21a of an oil recovery pipe 21 disposed inside the sewing machine frame 1 is directly opened and connected. As shown by the arrow in FIG. 4, the lubricating oil stored in the oil sump 17 is configured to be forcibly recovered at a predetermined location such as in an oil pan (not shown) through an oil recovery pipe 21. .

  In the case of this second embodiment, compared to the case of the first embodiment described above, the oil recovery pipe 21 cannot be held and incorporated in the sewing machine frame 1 in advance, so that the oil leakage prevention and dust prevention device When assembling each component of 5, special considerations such as devising the assembly order are necessary, and the structure for forced recovery of lubricating oil is slightly complicated, but in the case of the first embodiment It is possible to ensure equivalent oil leakage prevention and dustproof performance. In the second embodiment, the same members and the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In each of the above-described embodiments, the oil reservoir 17 has been described as a space. However, as shown in FIG. 5, the first elastic seal plate 12 is displaced downward in the oil reservoir 17. At this time, an oil-absorbing porous member 22 such as felt is held by contacting the lower end portion of the first elastic seal plate 12 and scraping off the lubricating oil scraped off from the outer peripheral surface of the swing feed bases 3 and 4 by capillary action. May be. In this case, since the lubricating oil scraped off by the first elastic seal plate 12 can be immediately sucked by capillary action by the oil-absorbing porous member 22 and guided to forced recovery, the scraped-off lubricating oil has the first elasticity. It can be prevented that the staying in the seal plate 12 is increased every time the swinging movements of the swing feed bases 3 and 4 and the seal performance is rapidly deteriorated. Furthermore, the dustproof effect can be further improved.

  In the case of FIG. 5, the oil-absorbing porous member 22 is brought into contact with the lower end portion of the first elastic seal plate 12 only when the first elastic seal plate 12 is displaced downward. As shown, an opening 12b is formed at the lower end of the intermediate thickness portion of the first elastic seal plate 12, and the oil-absorbing porous member 22 is placed in the oil reservoir 17 with a portion 22a entering the opening 12b. The first elastic seal plate 12 is always held in contact with the oil-absorbing porous member 22 regardless of the vertical movement displacement of the first elastic seal plate 12 to reduce the amount of oil staying in the first elastic seal plate 12, It is possible to further improve the sealing performance.

It is a schematic perspective view of the principal part in the overlock sewing machine in which the oil leakage prevention and dustproof device was incorporated in the first embodiment of the present invention. It is a disassembled perspective view of the principal part same as the above. It is an expanded vertical side view of the state which incorporated the oil leak prevention and dustproof device. It is an expanded vertical side view of the state which incorporated the oil leak prevention and dustproof device in 2nd embodiment of this invention. It is an expanded vertical side view of the principal part which shows other embodiment of this invention. It is an expansion vertical side view of the principal part which shows another embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sewing machine frame 2 Opening 3, 4 Oscillating feed stand 5 Oil leakage prevention and dust-proof device 7 Feed stand guide support 7a Window 8 Dust-proof elastic seal plate 8a Fitting hole 10 Front feed stand seal guide 11 Rear feed stand seal guide 11a Window 12 First elastic seal plate 12a for preventing oil leakage Fitting hole 13 Second elastic seal plate 13a for preventing oil leakage Fitting hole 14 Seal retainer 14A, 14B Dividing feed guide 17 Oil reservoir 18, 19 Through hole 20 Through-hole 21 Oil recovery pipe 21a One end suction port 22 Oil-absorbing porous member

Claims (4)

Attached to the opening of the sewing machine frame through which a swing feed base supported so as to be capable of swinging in the front-rear and up-down directions is inserted, and the lubricating oil scattered with the oil supply in the sewing machine frame leaks to the outside from the opening. An oil leakage preventive and dustproof device for a sewing machine that prevents external dust from entering the machine frame through the opening,
A feed base guide support fixed to a sewing machine frame so as to cover the opening and formed with a window allowing a swing displacement of the swing feed base, and disposed on the inner surface side of the feed base guide support. A dustproof elastic seal plate having a fitting hole into which the feed base is fitted, and the dustproof elastic seal plate are sandwiched between the feed base guide support and above and below the swing feed base and the dustproof elastic seal plate. A front feed base seal guide that allows dynamic displacement and a window that allows swing displacement of the swing feed base are formed, and a first elastic seal for preventing oil leakage between the front feed base seal guide. Oil leakage having a rear feed base seal guide that is fixed to the feed base guide support by sandwiching a plate, and a fitting hole that is disposed on the inner surface side of the rear feed base seal guide and into which the swing feed base is fitted. A second elastic sealing plate for preventing The second elastic sealing plate is sandwiched between the rear feed base seal guide, and a seal retainer to allow the vertical movement displacement of the second elastic sealing plate of the swing feed table and leakage oil for preventing,
Between the lower ends of the front feed base seal guide and the rear feed base seal guide, which are arranged so as to sandwich the first elastic seal plate for preventing oil leakage, the first elastic seal plate swings and feeds. An oil sump is formed that can store the lubricating oil that is scraped off from the stand and flows into the oil sump. One end of the oil recovery pipe that is connected to the pump and disposed in the sewing machine frame is opened in the oil sump. An oil leakage prevention and dustproof device for a sewing machine, which is configured to be connected and forcibly recover the lubricating oil stored in the oil reservoir to a predetermined location via an oil recovery pipe . One end suction port of the oil recovery pipe is, the front feed table seal guide the lower end near the formed through-hole and the feed base guide supports formed in the through-hole and the machine frame is formed in the oil recovery through Opened and connected to the oil reservoir through a long hole, the lubricating oil stored in the oil reservoir is configured to be forcibly recovered at a predetermined location via each through hole, through long hole and oil recovery pipe. The oil leakage prevention and dustproof device of the sewing machine according to claim 1.   3. The sewing machine oil leakage prevention and dustproof device according to claim 1, wherein the seal presser is also used by a feed base guide that is divided into left and right parts and incorporated in a sewing machine frame.   In the oil reservoir, at least when the first elastic seal plate is moved down and displaced, an oil-absorbing porous material that absorbs the lubricating oil that contacts the first elastic seal plate and is scraped off from the swing feed base by capillary action The oil leakage prevention and dustproof device for a sewing machine according to any one of claims 1 to 3, wherein the member is held.

Images