TWI415989B - Leakage prevention device for upper hook mechanism - Google Patents

Abstract

The invention relates to an oil leak preventing device for an upwards curved needle mechanism. A columned upwards curved needle guiding body capable of being freely and rotationally inserted and kept on a circular hole formed on an upwards curved needle guiding component is formed with an upper communicating slotted hole and a lower communicating slotted hole orthogonal with a communicating hole for sliding and lifting of an upwards curved needle table, an oil seal ring elastically and glidingly contacting the outer peripheral face of the upwards curved needle table and provided with a labial part for scraping lubricating oil is inserted in the upper communicating slotted hole, and an oil suction ring capable of sucking and keeping the scraped residual lubricating oil is inserted in the lower communicating slotted hole, therefore, the oil leak preventing device can reliably and favorably exert scraping function of the residual lubricating oil, can reliably prevent the scraped residual lubricating oil from being attached to the outer peripheral face of the upwards curved needle table again to disperse upwards, and can stably maintain the oil link preventing function for a long term.

Description

Oil leakage prevention device for upper hook mechanism

The present invention relates to an oil leakage preventing device for an upper hook mechanism in a copying cart. More specifically, the present invention relates to an oil leakage preventing device which constitutes an upper hook mechanism in such a manner as to excessively lubricate the lubricating oil supplied to the outer peripheral surface of the upper hook table in order to improve the high-speed running performance of the sewing machine. The oil does not move up and down with the sliding movement of the upper hook table, and in particular, it does not leak or scatter on the upper portion of the upper hook guiding member to contaminate the wire or the cloth. More specifically, the present invention relates to an oil leakage preventing device for an upper hook mechanism, the basic configuration comprising: an upper hook guiding member fixed to the frame; and a cylindrical upper hook guiding body formed on the upper thread The circular hole of the hook guiding member is rotatably fitted around the center of the circle; the upper hooking table is slidably inserted into a hole formed through the radial direction of the upper hook guiding body, and is at the upper end thereof Fixing the upper hook; the link mechanism connecting the lower end of the upper hook to the upper hook shaft in a linked state, so that the upper hook is guided to the upper hook guide body along with the forward and reverse reciprocating rotation of the upper hook shaft And sliding up and down around the center of the circle; and a lubricating oil supply means for supplying lubricating oil to the outer peripheral surface of the upper hook.

As an oil leakage preventing device having the above-described basic configuration of the upper hook mechanism, it has been proposed and known in the prior art, that is, for example, Japanese Patent Laid-Open No. Hei 9-66184 or In the same manner as disclosed in Japanese Patent Application No. 2004-187940, the peripheral surface of the upper wire hooking table is in sliding contact with the periphery of the hole at the upper end of the through hole formed by the upper wire hooking body, that is, the metal contact is scraped, and is supplied to the outer peripheral surface of the upper wire hook table and attached. And the excess portion of the lubricating oil that is lifted when the upper hook is raised, so that the excessive lubricating oil scraped is accumulated in the upper end portion of the oil tank or in the opening around the upper end of the through hole, and the oil groove faces in order to rotate The upper hook portion of the upper hook guiding member is curved and formed in an arc shape along the upper peripheral surface of the upper hook guiding member so as to be freely fitted and held in a cylindrical upper hook guiding body. The accumulated excess lubricating oil is recovered (discharged) to the machine by gravity and the negative pressure caused by the rotary motion of the upper hook guiding body in the arcuate oil groove or by the forced attraction force formed by the pump. Below the shelf.

However, in the above-mentioned oil leakage preventing device of the above-mentioned conventional upper hook mechanism, the lubricating oil adhering to the outer peripheral surface of the upper hook table is scraped by the metal contact between the outer peripheral surface of the upper hook and the upper hook portion of the upper hook guiding member. In order to exert a sufficient and sufficient scraping action so as not to disperse the excessive lubricating oil upward, and in order to prevent the peripheral surface of the upper hook and the upper hook and the upper hook guiding member from being around the hole (or the through hole) There is a need for a high processing technique that is very precise and appropriately sets the gap between the two. Further, there is a problem that no matter how long the precision and the appropriate gap can be set, the wear of the sewing machine is gradually increased due to the wear of the sewing machine for a long period of time, and the scraping action of the excess lubricating oil deteriorates with time, resulting in a specific result. The oil leakage prevention function gradually decreases. For example, the amount of flying oil above the lubricating oil increases, and further, the lubricating oil flows down the outer circumferential surface of the upper hook table. And dirty racks, etc.

In order to solve the problem of the oil leakage preventing device of the above-mentioned conventional upper hook mechanism, the applicant of the present invention has developed the oil leakage prevention of the upper hook mechanism which is disclosed in Japanese Laid-Open Patent Publication No. 2006-150025. The device has been patented (hereinafter, referred to as the applied technology).

The oil leakage preventing device of the above-mentioned technically applied upper hook mechanism developed by the applicant of the present application adopts the following configuration: as shown in Fig. 17 and Fig. 18 of the main part thereof, the hook guide body 6 is attached to the cylindrical shape, and the hook is hooked for the upper thread. The through hole 7 that is slidably inserted in the radial direction and penetrated in the radial direction of the upper hook guiding body 6 is orthogonally formed in the thickness direction of the upper hook guiding body 6 to form two upper and lower through holes 19 and 20, wherein The through hole 19 is embedded with an oil seal ring 21 to which an elastic lip 21a is attached, and the elastic lip 21a elastically slides in contact with the outer peripheral surface of the upper hook table 8 to scrape excess oil adhering to the outer peripheral surface. In part, on the other hand, the oil absorbing ring 22 that absorbs the excess lubricating oil scraped off is embedded in the through-hole 20 in the lower portion.

According to the prior art developed by the applicant of the present invention, the outer peripheral surface of the upper hook table 8 is elastically slidingly contacted with the elastic lip 21a of the oil seal ring 21, that is, the non-metallic elastic contact is scraped and attached to the outer circumference of the upper hook table 8. The excess portion of the lubricating oil on the surface can prevent the gap between the two (the outer peripheral surface of the upper hook table 8 and the lip 21a) from being formed in an appropriate gap state, and can be extremely reduced. And so on, so that not only the scraping action of the excess lubricating oil can be fully utilized, but also the excess lubricating oil scraped off by the elastic lip 21a of the oil seal ring 21 can be immediately disposed in the oil. The oil absorbing ring 22 at the lower portion of the seal ring 21 is absorbed and held, whereby dust can be prevented from being mixed into the excess lubricating oil, and excess lubricating oil can be prevented from flowing along the outer peripheral surface of the upper thread hook 8 or the inner circumferential surface of the through hole 7. Bottom and dirty racks, etc. Further, a part of the excess lubricating oil absorbed and held by the oil absorbing ring 22 can be re-supplied to the outer circumferential surface of the upper thread hooking table 8, and can be recycled to the lubrication of the upper thread hooking table 8, thereby reducing the overall amount of lubricating oil used. Moreover, the effect of the lifting movement of the upper hook table 8 can be maintained smoothly for a long period of time, so that the problem of the oil leakage preventing device of the above-mentioned conventional upper wire hook mechanism can be solved.

However, as a result of further research on the applied technology developed by the applicant of the present application, it was found that the following problems still exist. That is, a portion of the excess lubricating oil scraped off by the elastic lip 21a of the oil seal ring 21 is wound back to the outer peripheral portion of the oil seal ring 21 and accumulated between the oil seal ring 21 and the inner peripheral surface of the end of the through hole 19. In the formed fine space portion x, the lubricating oil accumulated in the fine space portion x is twisted toward the upper side of the oil seal ring 21 in accordance with the reciprocal rotation of the upper hook guide body 6, and the lubricating oil that is turned upward is attached again. It is scattered on the outer peripheral surface of the upper hook table 8 and is scattered upwards, so that oil leakage occurs in a short-term use. In particular, the more the amount of oil supplied to the outer peripheral surface of the upper hook table 8 is increased, the more the oil leakage occurs in a short-term use, and the problem that the specific oil leakage preventing function cannot be stably maintained for a long period of time is left.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an oil leakage preventing device for an upper hook mechanism, which can always be used satisfactorily. The scraping action of excess lubricating oil not only prevents dust from being mixed into the excess lubricating oil, but also prevents the excessively scraped lubricating oil from reattaching to the outer peripheral surface of the upper hook table even when the oil supply amount is increased. It is scattered upwards to maintain a specific oil leakage prevention function for a long period of time.

An oil leakage preventing device for a wire hook mechanism according to the invention of claim 1 of the present invention, comprising: an upper hook guiding member fixed to the frame; and a cylindrical upper hook guiding body And rotatably fitted around the center of the circle in the circular hole formed by the upper hook guiding member; the upper hooking surface is slidably inserted through the radial direction of the upper hook guiding body a hole, and an upper hook is fixed at an upper end thereof; a link mechanism connecting the lower end of the upper hook to the upper hook shaft in a linked state, so that the upper hook is rotated by the forward and reverse reciprocating rotation of the upper hook shaft The upper hook guiding body guides and slides up and down while being tilted around the center of the circle; and a lubricating oil supply means for supplying lubricating oil to the outer peripheral surface of the upper hooking table; the above-mentioned cylindrical upper hook guiding body, and the above The through holes are formed in the through-state in a thickness direction in the thickness direction of the upper hook guiding body, and the upper and lower long holes are formed in the through hole. An oil seal ring of the lip, the elastic lip elastically slidingly contacting the outer peripheral surface of the upper hooking surface to scrape the excess portion of the lubricating oil attached to the outer peripheral surface, and is embedded in the through hole in the lower portion An oil suction ring for absorbing the excessively scraped lubricating oil, wherein the oil leakage preventing device of the upper hook mechanism is characterized in that the upper portion of the upper hook guiding body penetrates into the long hole and is installed on the outer periphery of the oil seal ring There is a porous member that can absorb the lubricating oil scraped by the above elastic lip.

According to the invention of claim 1 having the characteristics as described above, it is a matter of course that the effect of the applied technology developed by the applicant of the present invention is that the non-metallic elastic contact is used for scraping adhesion. The excess portion of the lubricating oil on the outer surface of the upper hooking surface, so that no excess gap is formed between the outer peripheral surface and the lip of the upper hooking table, and the gap is adhered in an appropriate gap state, and the wear thereof can be greatly reduced. Therefore, the scraping action of the excess lubricating oil is always fully utilized; and the excess lubricating oil scraped off by the elastic lip of the oil seal ring is immediately absorbed and held by the oil absorbing ring disposed at the lower portion of the oil seal ring, thereby suppressing The dust is mixed into the excess lubricating oil, and the excess lubricating oil can also be prevented from flowing down the outer circumferential surface of the upper hook surface or the inner circumferential surface of the through hole to contaminate the frame, etc.; and the excessive lubrication absorbed by the oil suction ring One part of the oil is again supplied to the outer peripheral surface of the upper hook table, thereby recycling the lubrication of the upper hook table, thereby reducing the overall amount of lubricating oil used. And the long-term smooth maintenance of the lifting movement of the upper hook.

In addition, the porous member can absorb and retain the excess lubricating oil which is scraped by the elastic lip of the oil seal ring and wraps around to the outer portion of the oil seal ring, thereby preventing the part of the excess lubricating oil scraped as much as possible. When the upper hook guide is reciprocally rotated, it is slid toward the upper side of the oil seal ring and adheres again to the outer peripheral surface of the upper hook table and is scattered upward, thereby preventing the oil leakage prevention function in a short period of time. Therefore, it is possible to stably maintain the specificity for a long period of time. The oil leakage prevention function has a remarkable effect.

Further, in order to achieve the same object as the above, the oil leakage preventing device for the wire hook mechanism of the invention of claim 4 of the present invention, The utility model comprises: an upper hook guiding member fixed to the frame; a cylindrical upper thread hook guiding body rotatably fitted around the center of the circle in the circular hole formed by the upper hook guiding member; the upper hook a slidably inserted through a hole formed in a radial direction of the upper hook guiding body, and an upper hook is fixed at an upper end thereof; and a link mechanism that connects the lower end of the upper hook to the interlocking state The upper hook shaft is caused to be guided to the upper hook guiding body with the forward and reverse reciprocating rotation of the upper hook shaft, and is slid and raised while being tilted around the center of the circle; and the lubricating oil supply means is directed to the upper thread The outer peripheral surface of the hooking table is supplied with lubricating oil; and the cylindrical upper hook guiding body is formed with the upper and lower long holes in the thickness direction of the upper hook guiding body in a penetrating state orthogonal to the through hole, wherein the upper and lower long holes are formed in the upper portion An oil seal ring with an elastic lip is embedded in the through hole, and the elastic lip is elastically slidingly contacted with the outer peripheral surface of the upper thread hook to scrape and adhere to the outer peripheral surface. The excess portion of the lubricating oil and the oil absorbing ring capable of absorbing and retaining the excessively scraped lubricating oil are embedded in the through hole of the lower portion, and the oil leakage preventing device of the upper thread hook mechanism is characterized in that the upper thread hook guide A porous member capable of absorbing the lubricating oil scraped by the elastic lip is attached to the outer peripheral portion of the upper portion of the oil seal ring, and is provided with forced recovery by the porous member. Lubricating means for lubricating oil.

According to the invention of the fourth aspect of the invention, which is characterized by the above-described features, in addition to the effects of the invention of the first aspect of the invention, the following effects can be exhibited: in order to maintain the upper line smoothly during high-speed operation of the sewing machine The lubrication performance of the hook table increases the oil supply to the upper hook table, When the amount of excess lubricating oil scraped off increases, the absorption amount of the porous member increases to a saturated state, and oil leakage occurs at an earlier stage. However, in this case, forced recovery is possible. By forcibly recovering the lubricating oil absorbed by the porous member and discharging the oil, it is possible to more reliably and reasonably prevent the excess lubricating oil from adhering again to the outer peripheral surface of the upper hook table and thereby causing the upward scattering to occur, thereby achieving the desired The oil leakage prevention function and its continuous effect are significantly improved.

In the oil leakage preventing device for the wire hook mechanism according to the invention of the first or fourth aspect of the invention, the oil leakage preventing device of the upper wire hook guiding body may be provided at a position higher than the oil seal ring in the through hole of the upper wire hook guiding body. A dustproof sealing ring with an elastic lip for dustproof sealing, the elastic lip for preventing dust from entering the through hole from the upper portion of the upper hook guiding body (Application No. 2, Item 5) Or in the oil seal ring, in addition to the elastic lip for scraping the excess lubricating oil, the elastic lip for dustproof sealing is integrally formed, and the elastic lip for the dust seal is used to prevent dust from the upper hook guiding body The upper portion penetrates into the through hole (the third and sixth items of the patent application), thereby preventing the scraping elastic lip and the upper hook guiding the outer peripheral surface of the dust from entering the through hole from the upper portion. There is a problem such as wear and the like, or mixing into the excessively scraped lubricating oil, which causes problems such as a decrease in lubricating performance. In particular, in the case of using an oil seal ring in which the scraping elastic lip and the dust seal elastic lip are integrally formed with the excess lubricating oil, only a single oil seal ring can be used, so that simplification of construction and assembly can be achieved. Further, the dustproof effect described above can be exerted to prevent the occurrence of a problem of deterioration in lubricating performance.

Further, as a means for forcibly recovering the lubricating oil in the oil leakage preventing device of the wire hook mechanism of the invention of the fourth aspect of the invention, it may be any one of the following, that is, as shown in the seventh paragraph of the patent application scope In the oil drain hole and the suction pump, the oil groove is formed on the upper hook guide body so that the lubricating oil absorbed by the porous member flows down to the oil suction ring side to connect and connect the upper and lower through holes. The oil drain hole is formed by forcibly collecting the lubricating oil absorbed and held by the oil absorbing ring, including the lubricating oil flowing down through the oil groove, and is formed in a state in which the front suction port opening is connected to the through hole of the lower portion. The rack, the suction pump is connected to the oil drain hole, or is constituted by an oil drain hole and a suction pump as shown in the eighth item of the patent application, wherein the oil drain hole is directly forcibly recovered and absorbed by the porous member. The lubricating oil is formed on the frame in a state in which the front end suction port opening is connected to the upper through hole, and the suction pump is connected to the oil discharge hole.

Further, as an oil groove which is a component of the lubricating oil forced recovery means in the oil leakage preventing device of the wire hook mechanism of the invention of the fourth aspect of the invention, it is preferable that the oil groove is as shown in item 9 of the patent application, A plurality of oil grooves are formed at positions on the left and right sides of the guide body in the direction of the rotation axis, and the left and right sides are substantially symmetrical about the sliding axis of the upper hook table. In this case, the lubricating oil which is absorbed by the porous member in the outer peripheral portion of the oil seal ring and which is saturated can be deflected to the left and right with the reciprocating rotation of the upper hook guide, and smoothly flows down through the lower oil groove. The lower portion penetrates the oil suction ring side in the long hole, and the forced recovery of excess lubricating oil can be further reliably and quickly performed, thereby achieving the desired oil leakage prevention effect. Further improvement.

Hereinafter, embodiments of the present invention will be described based on the drawings.

Fig. 1 is a view showing a frame 1 in a crepe car in which the oil leakage preventing device of the wire hook mechanism according to the first embodiment of the present invention is mounted, in a state in which the cover (not shown) attached to the front side is removed. In the front view of the whole, an upper hook mechanism 2 appears on the front side of the frame 1.

2 is an exploded perspective view of the upper hook mechanism 2, FIG. 3 is an assembled perspective view of the upper hook mechanism 2, and FIG. 4 is a front view of the upper hook mechanism 2. In the figures, 3 is attached to the upper hook guiding member on the front surface of the frame 1 via the fixing screw 4, and the circular hole 5 in the feeding direction is formed at the front end portion of the upper hook guiding member 3 so as to be The upper and lower sides have a state facing the openings 5A, 5B of the upper surface and the lower surface of the upper hook guiding member 3. In the circular hole 5, the cylindrical hook guiding body 6 is rotatably fitted around the center of the circle, and the cylindrical hook guiding body 6 is formed in a state in which it penetrates in the radial direction. The hole 7 is slidably inserted into the through hole 7 and has a cylindrical upper thread hook 8 .

The upper hook 10 is fixed to the upper end portion of the upper hook table 8 via a fixing screw 9, and the lower end portion of the upper hook table 8 is rotatably coupled to the other end of the upper hook shank 13 via the cylindrical pin 14. The upper hook shank 13 is fixed at its bottom end by a fastening screw 12 to rotate with the sewing machine main shaft (not shown) to reciprocally rotate the upper hook shaft 11 so as to be in the up and down direction (the arrow u-d in FIG. 4). Direction) reciprocating rocking motion by the on-line The hook crank 13 and the cylindrical pin 14 constitute a link mechanism which is guided to the upper hook guide body 6 and surrounds the center of the circle with the forward and reverse reciprocating rotation of the upper hook shaft 11 The tilting movement slides up and down.

The wick 15 impregnated with the lubricating oil is filled in the hollow portion of the cylindrical pin 14 constituting the link mechanism, and is horizontally disposed and fixed to the lower position of the inside of the frame 1 and has a notch portion at the upper surface portion thereof. The oil supply cylinder 16 of the 16a is also filled with a wick 17, and one end of the oil core 17 is slightly protruded from the end surface of the oil supply cylinder 16 to be in sliding contact with the lower end portion of the upper thread hook table 8. By the above-mentioned constituent items, the lubricating oil supply means is immersed in the oil at the lower end portion and the protruding end portion of the oil core 17 intermittently when the upper thread hooking portion 8 is slidably moved up and down. One of the lubricating oil in the core 17 is partially splashed, and is intermittently brought into contact with the protruding end portion of the oil core 17, and is turned to the side of the oil core 15, and the lubricating oil held in the oil core 15 gradually oozes out and adheres to the pin 14. In the above-described lubricating oil, the adhered lubricating oil is scattered by the reciprocal rotation of the pin 14 and becomes a spray, and functions to supply the lubricating oil to the outer peripheral surface 8a of the upper thread hook 8 .

In the above-described hook-up mechanism 2 having a basic configuration as described above, as shown in FIGS. 5 to 9, the cylindrical upper hook guiding body 6 is orthogonal to the through-hole 7 in the radial direction. The upper and lower long holes 19 and 20 are formed in the thickness direction of the upper hook guiding body 6 in a through state. In the two through-holes 19 and 20, an oil seal ring 21 in which an elastic lip 21a and a dust seal elastic lip 21b are integrally formed on the inner peripheral surface side is embedded in the upper through hole 19, and the elastic lip is formed. 21a and the outer peripheral surface 8a of the above-mentioned upper hook table 8 The excess portion of the lubricating oil supplied by the lubricating oil supply means and attached to the outer peripheral surface 8a is scraped elastically by sliding contact, and the dust seal elastic lip 21b prevents dust from being applied from the upper portion of the upper hook guiding body 6. Intrusion into the through hole 7 and in the outer peripheral portion of the oil seal ring 21 is filled in a state in which a fine space portion formed between the oil seal ring 21 and the inner peripheral surface of the end of the long hole 19 is filled. The porous member 25 such as sponge, which absorbs a part of the excess lubricating oil scraped by the elastic lip 21a.

On the other hand, an oil absorbing ring 22 composed of a felt or the like which can absorb and retain a part of lubricating oil is embedded in the through hole 20 at the lower portion of the upper hook guiding body 6, and the lubricating oil is the elastic lip of the oil sealing ring 21 described above. The excess lubricating oil scraped off by the edge 21a flows down along the fine gap between the outer peripheral surface of the upper hook table 8 and the inner peripheral surface of the through hole 7.

Further, as shown in FIG. 1, an oil discharge hole 23 is formed in the frame 1 in an inclined state, and the length of the oil discharge hole 23 is from the lower end portion of the frame 1 to the vicinity of the front end portion of the upper thread hook guiding member 3. until. The lower end portion of the oil drain hole 23 is connected to a pump (not shown) such as an axle pump or a gear pump via a drain pipe (not shown), and is shown on the upper end portion and the oil drain hole 23 as shown in FIG. A suction port 24 having an opening connected to the upper hook guiding body 6 and forming an upper through hole 19 is formed by orthogonally perforating, and the pump and the oil drain hole 23 constitute a lubricating oil forced recovery means, and the lubricating oil forced recovery means The excess oil which is absorbed and held by the porous member 25 is forcibly recovered (discharged) from the suction port 24 by the oil drain hole 23 described above.

Next, the operation of the smashing vehicle including the oil leakage preventing device of the wire hook mechanism 2 according to the first embodiment described above will be described.

The upper hook shank 13 reciprocates in the direction of the arrow u-d of FIG. 4 with the forward and reverse reciprocating rotation of the upper hook shaft 11 in conjunction with the rotation of the sewing machine main shaft (not shown), and the upper hook shank 13 In the reciprocating rocking motion, the upper hooking table 8 slides up and down in the direction of the arrow u1-d1 of FIG. 4 in the through hole 7 of the upper thread hook guiding body 6, and the upper thread hook guiding body 6 surrounds the circular hole 5 of the upper thread hook guiding member 3 The center of the circle rotates back and forth. Thereby, the upper hook 10 moves as shown by an arrow a in FIG. 4, and moves in a manner of drawing a parabolic trajectory, and cooperates with a needle (not shown) and a lower thread hook to form an edge lock seam.

In the edge locking operation, when the upper thread hook 8 is slid and raised, the lower end portion is intermittently slidably contacted with the protruding end portion of the oil core 17 in the oil supply cylinder 16, and is impregnated into the oil core 17. One of the lubricating oil is partially splashed, and from the oil core 17 to the oil core 15 side, the lubricating oil held in the oil core 15 gradually oozes out and adheres to the pin 14, and the adhered lubricating oil is accompanied by the reciprocation of the pin 14. Rotating and scattering in a spray shape, lubricating oil is supplied to the outer peripheral surface 8a of the upper thread hook table 8 and adhered to the outer peripheral surface 8a. Thereby, the lubricity of the sliding up and down of the upper hook hook 8 in the upper hook mechanism 2 can be satisfactorily maintained.

Further, the excess portion of the lubricating oil adhering to the outer peripheral surface 8a of the upper hook table 8 is scraped by the elastic contact of the outer peripheral surface 8a of the upper hook table 8 with the elastic lip 21a of the oil seal ring 21, so that It is possible to prevent the excessive lubricating oil from scattering (oil leakage) above the upper hook guiding body 6 and the upper hook guiding member 3, and causing occurrences such as fouling lines or cloth.

Further, by the elastic contact with the elastic lip 21a of the oil seal ring 21, part of the excess lubricating oil scraped by the outer peripheral surface 8a of the upper hook table 8 is shun. The fine gap between the outer circumferential surface of the upper hook table 8 and the inner circumferential surface of the through hole 7 flows down, and is immediately absorbed and held by the oil absorbing ring 22 disposed at the lower portion of the oil seal ring 21, thereby preventing excessive lubrication. The oil flows downward along the outer circumferential surface 8a of the upper thread hook 8 or the inner circumferential surface of the through hole 7, thereby deteriorating the state of the frame 1 and the like, and lubricating oil absorbed and held by the oil suction ring 22 from the oil suction ring 22 The inner circumferential surface is again supplied to the outer circumferential surface 8a of the upper thread hook table 8, thereby recycling it in the lifting movement of the upper thread hook table 8, so that no lubricating oil is wasted, the overall amount of lubricating oil can be reduced, and the oil can be used for a long time. Slidingly maintains the lifting movement of the upper hook table 8.

On the other hand, the remaining portion of the excess lubricating oil scraped off by the outer peripheral surface 8a of the upper hook table 8 by elastic contact with the elastic lip 21a of the oil seal ring 21 is wound back to the outer periphery of the oil seal ring 21 The porous member 25 is absorbed and held. Further, when the sewing machine is operated at a high speed, even if the amount of oil supplied to the upper hook table 8 is increased, the amount of excess lubricating oil scraped off by the elastic lip 21a of the oil seal ring 21 increases. As a result, the amount of absorbed oil of the porous member 25 increases and reaches a saturated state, and the lubricating oil absorbed by the porous member 25 can be forcibly recovered and discharged by the above-described lubricating oil forced recovery means. Thereby, it is possible to prevent a part of the excessively scraped lubricating oil from being smashed toward the upper side of the oil seal ring 21 with the reciprocal rotation of the upper thread hook guide body 3, and again attached to the outer peripheral surface 8a of the upper thread hook table 8, and then scattered upward. In the short term, the oil leakage prevention function is reduced, so that the expected oil leakage prevention function can be stably maintained for a long period of time.

Further, the elastic lip 21b integrally formed on the oil seal ring 21 prevents dust such as swarf falling from the upper portion of the upper hook guiding member 3 from entering the through hole 7, thereby preventing the dust from entering the upper hook. Table 8 The outer peripheral surface 8a and the inner peripheral surface of the through hole 7 are caused by abrasion or the like, or mixed with the excessively scraped lubricating oil to cause problems such as a decrease in lubricating performance.

As described above, it is possible to maintain the lubricity by continuously supplying the lubricating oil, thereby preventing the line or the cloth from being stained due to the scattering of the lubricating oil upward, that is, the function of preventing the oil leakage prevention, and the circulation of the excess lubricating oil. The function and the function of preventing dust from entering the through hole 7 and dust from being mixed into the excess lubricating oil are combined, whereby the operation of the copying vehicle can be maintained smoothly and stably for a long period of time.

FIG. 11 to FIG. 16 are enlarged views of a main part of a lubricating oil forced recovery means in the oil leakage preventing device of the wire hook mechanism according to the second embodiment of the present invention. In the second embodiment, the upper and lower through-holes 19 and 20 are formed to be orthogonal to the through-holes 7 in the radial direction of the upper hook guiding body 6, as shown in FIG. 6 on both sides 6a, 6b of the direction of the rotation axis, and a total of four oil grooves 26 are formed at a position substantially symmetrical with respect to the center of the sliding axis of the above-mentioned line hook table 8, and are formed on the frame 1 by perforation in an inclined state. The lower end portion is connected to the upper end of the oil drain hole 23 of a pump (not shown) such as an axle pump or a gear pump via a drain pipe (not shown), and the suction port 24 is connected to the upper wire hook as shown in FIG. The lower portion of the body 6 is formed through the long hole 20, and the oil drain hole 23 to which the suction port 24 is attached, the pump and the oil groove 26 constitute a lubricating oil forced recovery means. The other components are the same as those in the first embodiment, and therefore, the same reference numerals will be given to the corresponding members and the parts, and the detailed description will be omitted.

The oil leakage preventing device of the wire hook mechanism 2 of the second embodiment is provided The operation of the tampering cart is basically the same as that described in the first embodiment, but excessive lubrication is scraped from the outer peripheral surface 8a of the upper hooking table 8 by elastic contact with the elastic lip 21a of the oil seal ring 21. Since the post-oil treatment is different from that of the first embodiment, the above-described excess lubricating oil post-treatment will be described below.

That is, the excess lubricating oil scraped from the outer peripheral surface 8a of the upper hooking table 8 and wound back to the outer peripheral portion of the oil seal ring 21 by the elastic contact with the elastic lip 21a of the oil seal ring 21 is made of the porous member 25 The lubricating oil that is absorbed and held, but the porous member 25 is in a saturated state and cannot be absorbed, flows through the oil groove 26 and flows down to the lower through hole 20 side, and passes through the outer peripheral surface 8a of the upper hook line 8 or through. The lubricating oil flowing down the inner peripheral surface of the hole 7 is absorbed and held by the oil absorbing ring 22, and the lubricating oil absorbed and held by the oil absorbing ring 22 is forcibly recovered by the lubricating oil forced recovery means and drained. Therefore, even in the case of the second embodiment, particularly when the oil supply amount to the outer peripheral surface 8a of the upper thread hooking table 8 is increased, it is possible to prevent a part of the excessive lubricating oil scraped from being accompanied by the upper thread hook guiding body 3. The reciprocating rotation is applied to the upper side of the oil seal ring 21 and is again attached to the outer peripheral surface 8a of the upper thread hook 8 to be scattered upward, and the oil leakage prevention function is reduced in the short-term, so that the expected oil leakage prevention function can be stably maintained for a long period of time. .

Further, in the above-described first and second embodiments, the dust seal elastic lip 21b and the excessive lubricating oil scraping elastic lip 21a are integrally formed on the oil seal ring 21, but the oil seal ring 21 may be used. In addition, a dust seal ring to which the elastic lip for dust seal is attached is separately provided, and the dust seal ring is fitted into the through hole 7 of the upper hook guide body 6 at a position higher than the oil seal ring 21. In this case, the upper hook guiding body 6 and the upper thread can be surely prevented. The dust scattered in the upper portion of the hook guiding member 3 intrudes into the fitting position of the oil seal ring 21 having the scraping elastic lip 21a of the excess lubricating oil, and the effect of preventing the occurrence of the above problem can be further enhanced. The problem is that dust invades between the outer peripheral surface 8a of the upper hook table 8 and the inner peripheral surface of the through hole 7 to cause wear thereof or the like, or to mix in the excess lubricating oil scraped off, which causes a decrease in lubricating performance.

Further, in the first embodiment, the suction port 24 that connects the oil drain hole 23 of the pump to the upper end of the upper hook guide body 6 is connected to the upper hook guide body 6, but may be formed. As shown by the broken line in Fig. 10, the opening is also connected to the suction opening 24' of the lower through hole 20.

Further, as shown in the above-described embodiment, the oil drain hole 23 of the frame 1 is formed by perforating in a straight line state from the lower end portion of the frame 1 to the vicinity of the end portion of the upper hook guiding member 3 before the end portion. However, the present invention is not limited thereto, and may be formed by combining a hole having a slight inclination slope and formed in a horizontal state with a hole formed in the vertical state and connected to the hole.

1‧‧‧Rack

2‧‧‧Upline hook mechanism

3‧‧‧Upline hook guiding member

5‧‧‧round hole

6‧‧‧Upline hook guide

7‧‧‧through holes

8‧‧‧Online hook

8a‧‧‧On the outside of the hook line

10‧‧‧Online hook

11‧‧‧Upline hook shaft

13‧‧‧Upline hook crank (main elements of the linkage mechanism)

15, 17‧‧‧ oil core (main elements of lubricant supply means)

19, 20‧‧‧through long holes

21‧‧‧ oil seal ring

22‧‧‧ Oil suction ring

23‧‧‧ Oil drain hole

24‧‧‧ attracting mouth

25‧‧‧Porous components

26‧‧‧ oil tank

Fig. 1 is a front elevational view showing the entire frame of the sewing machine in which the oil leakage preventing device of the wire hook mechanism according to the first embodiment of the present invention is mounted, in a state in which the state of the front cover is removed.

Figure 2 is an exploded perspective view of the upper hook mechanism.

Fig. 3 is an assembled perspective view of the above-mentioned upper hook mechanism.

Figure 4 is a front elevational view of the upper hook mechanism described above.

Fig. 5 is an enlarged front elevational view showing the main part of the upper hook mechanism.

Fig. 6 is an enlarged plan view showing the main part of the upper hook mechanism.

Figure 7 is a cross-sectional view taken along line A-A of Figure 5.

Figure 8 is a longitudinal sectional view taken along line B-B of Figure 6.

Figure 9 is a longitudinal sectional view taken along line C-C of Figure 5.

Fig. 10 is a longitudinal sectional side view showing the vicinity of the loading portion of the upper hook mechanism.

Figure 11 is an enlarged front elevational view showing the main part of the hook mechanism of the second embodiment of the present invention.

Figure 12 is an enlarged plan view showing the main part of the above-described upper hook mechanism.

Figure 13 is a cross-sectional view taken along line D-D of Figure 11.

Figure 14 is a longitudinal sectional view taken along line E-E of Figure 12 .

Figure 15 is a cross-sectional view taken along line F-F of Figure 11 .

Fig. 16 is a longitudinal sectional side view showing the vicinity of the loading portion of the upper hook mechanism.

Figure 17 is an enlarged front elevational view of the main portion of the thread hook mechanism above the technology that the applicant has applied for.

Fig. 18 is an enlarged plan view showing the main part of the upper hook mechanism.

2‧‧‧Upline hook mechanism

3‧‧‧Upline hook guiding member

4, 9‧‧‧ fixing screws

5‧‧‧round hole

5A, 5B‧‧‧ openings

6‧‧‧Upline hook guide

7‧‧‧through holes

8‧‧‧Online hook

8a‧‧‧On the outside of the hook line

10‧‧‧Online hook

11‧‧‧Upline hook shaft

12‧‧‧ fastening screws

13‧‧‧Upline hook crank

14‧‧ ‧ sales

15, 17‧‧‧ oil core

16‧‧‧Supply cartridge

16a‧‧‧Gap section

19, 20‧‧‧through long holes

21‧‧‧ oil seal ring

22‧‧‧ Oil suction ring

25‧‧‧Porous components

Claims (3)

An oil leakage preventing device for an upper hook mechanism, comprising: an upper hook guiding member fixed to the frame; and a cylindrical upper hook guiding body rotatably embedded in a circular hole formed on the upper hook guiding member And being held around the center of the circle of the circular hole; the upper hook table is slidably inserted into the hole formed through the diameter direction of the upper hook guiding body, and the upper hook is fixed at the upper end thereof; a mechanism that connects the lower end of the upper hook to the upper hook shaft in an interlocking state, so that the upper hook is guided by the upper hook guide body and surrounds the circular hole with the forward and reverse reciprocating rotation of the upper hook shaft The center of the circle is slid and lifted while being tilted; and the lubricating oil supply means supplies lubricating oil to the outer peripheral surface of the upper hooking table; and the diameter of the upper hook guiding body on the cylindrical upper hook guiding body The hole formed in the direction is formed in the through-state in the thickness direction of the upper hook guiding body with two upper and lower long holes, wherein the upper long hole is embedded with elasticity The edge of the oil seal ring elastically slides in contact with the outer peripheral surface of the upper thread hooking surface to scrape the excess portion of the lubricating oil attached to the outer peripheral surface, and is embedded in the long hole of the lower portion to be absorbed and retained. An oil absorbing ring of an excessively scraped lubricating oil, characterized in that: in the long hole of the upper portion of the upper hook guiding body, a peripheral portion of the oil seal ring is attached to absorb the scraped by the elastic lip a porous member of a lubricating oil, and a lubricating oil forced recovery means for forcibly recovering lubricating oil absorbed by the porous member; the lubricating oil forced recovery means comprising an oil groove, an oil drain hole, and a suction pump, wherein the oil groove is guided Lubrication absorbed by the above porous member The oil flows down to the oil suction ring side to form an upper hook guide body that communicates with the upper and lower long holes, and the oil drain hole forcibly recovers the oil suction ring including the lubricating oil flowing through the oil groove. The lubricating oil that has been absorbed and held is formed in the frame in a state where the front suction port opening is connected to the long hole of the lower portion, and the suction pump is connected to the oil drain hole. An oil leakage preventing device for a wire hook mechanism according to the first aspect of the patent application, wherein the oil seal ring is provided with an elastic lip for dust-proof sealing, in addition to an elastic lip for scraping with excess lubricating oil. The dust seal elastic lip is for preventing dust from entering the hole formed in the radial direction of the upper hook guide from the upper portion of the upper hook guide. The oil leakage preventing device of the wire hook mechanism according to the first or second aspect of the invention, wherein the oil groove is substantially on both sides in the direction of the rotation axis of the upper hook guiding body and about the sliding axis of the upper hook table. A plurality of positions are formed at the position of the symmetry.