TW440630B - Sewing machine - Google Patents

Abstract

To the lower part of the supporting bush for supporting a needlebar to the lower wall of the head part of this sewing machine, a seal holder is attached so as to surround the projecting part of the needlebar projected to the outer side of the head part. In the inside of the seal holder, a seal ring in slidable contact with the peripheral surface of the needlebar and an energizing ring in elastic contact with the outer surface of the seal ring are fitted. The inner surface of the seal ring is pressed to the peripheral surface of the needle bar by the energizing ring, the lubricating oil stuck to the peripheral surface of the needle bar is captured to the inner surface of the seal ring and the captured lubricating oil is led through an oil discharge hole communicated inside the seal holder and an oil discharge pipe connected to the oil discharge hole to an oil storage part and recovered.

Description

4406 30 V. Description of the invention (1) Technical field of the invention The present invention relates to a sewing machine, and each of the knuckles on the frame of the sewing machine / k A 1 and s, and relates to the return of the lubricant provided with the shaft. A sewing machine that slides to perform a predetermined operation ~ a sigh device. Prior technology and its problems Each part of the sewing machine is provided with a shaft that advances and retracts the looper at one end of the sewing machine. The shaft is fixed to the support bushing and is supported by the structure. In order to lubricate the sliding contact portion of the bushing of such a sliding shaft, the machine's structure is such that the oil supplied to the bearing guides and slides inside the supporting bushing. However, in the case where such a kidney joint is used, it is unavoidable that the slide adhering to the moving shaft is taken out of the support and the slide stroke is extended throughout the sewing machine frame (and the side opposite to the supply side of the lubricant). The slide shaft is attached to the periphery of the slide. Fear. In addition, there are many sliding shafts, such as a needle bar and a tongue cover rod, which move the needle mounted on one end up and down on both sides of the support bushing. The cylindrical support shafts at the appropriate positions of these sliding machine frames are generally guided to slide in the axial direction and move well. It is indispensable for supporting industrial sewing that requires high-speed operation. ^ Bushings After lubricating the oil on one side, the α joints are lubricated with oil by using an oil lubrication command. The sliding shaft Yuda is on the outer side of the running surface of the moving shaft that supports the bushing, and the outer part of the bushing. . Therefore, the lubricating oil that is brought out along the inside and outside of the slippery and the second branch; the needle rod and other shafts = the external surface is scattered and soiled. The side becomes the internal slipper of the sewing machine frame.

j 4 4 06 30 'f V. Description of the invention (2) In the case of the shaft, the lubricating oil taken out along with the sliding shaft to the other side of the bushing of the branch building stains the inside of the sewing machine frame or leaks during long-term operation. To the outside of the sewing machine frame. Because of the above-mentioned matter, 'a sewing machine provided with a sliding shaft that slides with lubricating oil from one side of the supporting shaft is provided with a lubricant for capturing the lubricating oil attached to the peripheral surface of the sliding shaft on the other side of the supporting bushing. The recycling device used for recycling is conventionally used in Examined Japanese Utility Model Publication No. 59-11745 (1984) (Examined Japanese Utility Model Publication No. 59-11745 (1984)), and Unexamined Japanese Utility Model Publication No. 7-12G80 (Unexamined Japanese Utility Model Publication No. 7-12080 Cl 984)) and other disclosed recovery devices. Figures IA and IB are explanatory diagrams showing the structure of a conventional recovery device, and Figure 1A is a longitudinal sectional view near the support portion of the sliding shaft, and Figure 丨 β is a transverse sectional view taken along the line A-A of Figure A. As shown in FIGS. 1A and 1B, a needle bar 1 serving as a sliding shaft penetrates and is supported by a support bushing 3 fixed to the inside and outside of the lower wall of the upper frame 2 of the sewing machine, and is supported by the upper frame 2 The operation of the driving mechanism not shown above, the support bushing 3 slides in the axial direction as a guide. The lubricating oil 'for sliding the needle bar 1 is supplied to one side (upper end side) of the support bushing 3 facing the inner side of the upper frame 2 and penetrates into the sliding contact portion of the support shaft bushing 3 and the needle bar 1. After the lubrication of the sliding contact portion is performed, the other side (lower end side) of the support bushing 3 facing the outer side of the upper frame 2 is recovered by a recovery device 5 configured as follows. The recovery device 5 is mounted so as to surround the

4406 30 V. Description of the invention (3) — ~ —- The inside of the cover 50 of the protruding part of the needle bar 1 is provided with a felt ring 51 which is tightly wound around the outer periphery of the needle bar 1 as shown in FIG. An oil-conducting felt 5 2 of a part of the circumferential surface of the felt ring 51 is formed by extending the other side of the oil-conducting felt 5 2 into an oil-conducting pipe 53 connected to a part of the cover 50. The lubricating oil that supports one side of the bushing 3 and adheres to the needle bar 丨 is absorbed by the felt ring 51 that is in contact with the peripheral surface and captured. It is also guided by the capillary tube [through the oil guide hair charm 52 to the In the oil-conducting state, the oil-retaining part, which is not shown in the drawing connected to the other oil-conducting state, flows back. Miscellaneous materials can be trapped in the recovery device 5 configured as described above, and the felt ring 51 in contact with the peripheral surface of the needle bar 1 is deteriorated early due to the lubricating oil absorbed as described above, and its catching effect is easily removed. The problem of frequent replacement of the ring 51 is that if the replacement is neglected, the lubricating oil contained in the degraded felt ring is squeezed out due to the action of the needle bar 1, which promotes peripheral pollution. In addition, in the case where the sliding stroke of the needle bar 1 extends across the inside of the sewing machine frame, foreign matter at the beginning of the sewing machine frame is attached to the downwardly moving needle bar ^ peripheral surface, when the foreign matter moves upwards on the needle bar 1 Intrusion and slippage of the felt ring 51 obstruct the needle bar! The fear of smooth sliding. In addition, in the case of a foreign material with high hardness such as swarf, the connection with the foreign object = the sliding contact surface with the needle bar i 'will promote the hair% ring 51 shells: a problem, and the needle bar will be damaged. 1's perimeter. n Summary of the invention The present invention is based on the above-mentioned facts. A sewing machine is provided with a self-supporting mechanism. The purpose is to provide one side of a bushing and attach it to a slide.

4406 30 = The lubricating oil on the peripheral surface is collected, and it can effectively stop the other side of the liner from catching and allowing the recovery device to enter. The cover, net can invade the foreign matter from the other side of the supporting bushing. Sliding shafts such as rods have a good mouth for a long time; the risk of oil leakage orders needle rods and loopers. The part of the sewing machine of the present invention which is a part of the sewing machine frame includes: a sliding shaft, which is inserted and fixed to supply the support shaft. Lining-the cylindrical support is supported by the bushing, benefiting from the seal holder part, which slides in the axial direction under the lubrication of the supporting side; the dense protruding part; the sealing ring, the other side of the liner is arranged to surround The inner surface of the sliding surface of the sliding shaft is inserted into the seal holder and lubricated with the sliding surface; a bias ring is caught on one side of the support bush and attached to the sealing ring. The inner surface is pressed against the peripheral surface of the sliding wheel and the outer surface of the seal ring, and the inner surface of the seal ring is captured by the peripheral surface; The surface is biased and pressed on the surrounding surface of the sliding shaft protruding from the inside of the seal ring. The lubricating oil is used to support the lubricating oil on the other side of the shaft supporting the bushing. In the pig, the inner surface of the ring is captured and adhered to the sliding method to guide the lubricating oil in the sealing position inside the sealing ring to the oil retaining part through the oil guide path, which is suitable for the trapped capillary phenomenon and natural fall. Foreign matter on the peripheral surface of the sliding shaft, the surface blocks the other side of the supporting bushing, and the anti-slip contact part is damaged to prevent oil leakage. The invasion and sliding contact part of the sliding shaft are prevented. Multiple sets of seal rings can be set in the axial direction. The sealing ring makes it possible to capture the lubricating oil and block the difference. In addition, it is characterized by the words + a M 'seal ring made of fluororesin, the bias ring

^ 4406 30 V. Description of the invention (5)

Adopt rubber D In the present invention, the sealing ring slidingly contacting the sliding shaft is made of fluororesin such as pTFE (Poly Tetra Fluoro Ethylene), which has a small friction coefficient, excellent abrasion resistance and oil resistance, in order to reduce sliding resistance and improve durability The biasing ring biased by the sealing ring is made of rubber with high elasticity, so as to fully press the peripheral surface of the sliding shaft. The needle bar that moves the needle at the protruding end on the other side of the bushing up and down has the same characteristics

It is also characterized in that the sliding shaft system is mounted on the support using its sliding order. 1 B is a diagram illustrating conventional sewing ^. FIG. D I is a schematic illustration of a sewing machine according to the present invention.

Figures IA and 1B are explanatory views showing the structure of the Xi device, and Figure 2 is a sectional view showing the present invention. The structure of the main part of the recovery of the lubricating oil provided by the machine is the vertical implementation of the sewing machine. The sewing machine is shown in Fig. 3 (toward the melon of Fig. 2 and Fig. 4 to the drain pipe).发明 之 ， 向 向 的 面 图。 The invention ,! Example of a sectional view. Implementation of the prepared recovery device Description of the invention (6) An enlarged sectional view of the main part of Example 1. FIG. Β is an enlarged cross-sectional view showing the vicinity of the 6 褒 position of the seal ring and the bias ring of the recovery device shown in FIG. 5. ^ Fig. 7 is an enlarged sectional view of a main part of Example 2 showing a recovery device provided in the sewing machine of the present invention. Fig. 8 is a perspective view showing the application of the recovery device in the support part of the looper rod. < FIG. 9 is an enlarged cross-sectional view near the support portion of the looper.

Fig. 10 is an enlarged sectional view showing the second embodiment of the recovery device provided on the support portion of the looper rod. % Preferred Embodiments of the Invention The present invention is described in detail below with reference to the drawings showing the embodiments. Fig. 2 is a table ~ A longitudinal sectional view of the structure of the main part of the sewing machine of the present month ^ In addition, this figure shows an application example of an overlock machine for cross stitching, 1 as described below of the present invention Characteristic creation can of course also be applied to sewing machines outside Baodan. The needle bar 1 as a sliding shaft in Fig. 2 is installed on the front side of the overlock machine section 2 (on the right side of Fig. 2) so that its lower end is inclined forward.

The inside of the head portion 20 is surrounded by a peripheral wall having an appropriate thickness, and a hollow chamber having a cross-sectional shape as shown in the figure is enclosed. On the upper part of the head 20, the lower part 4 and the wall 22 are fixed, and the support shaft which penetrates inside and outside and is located on the same axis is viewed as 3b '. It tilts and slides freely in the axial direction.

Page 9 ^ 44 06 3 〇 V. Description of the invention (7) The lower end of the needle bar 1 is protruded below the supporting bush 3b at an appropriate length ′ to face the needle plate 23 on the lower frame 8. At this lower end portion, the supporting shaft bushings 3a, 3b above and below the needle U 'needle rod i are installed through the needle = fixing piece 10 (for up and down movement, the needle installed at the lower end of the needle rod 丨 丨Move up and down with the stroke of the needle plate up and down to sew the clip on the needle plate 23_ ί = " ρ20 The rear part of the inside of the chamber is configured on the structure using the transmission from the angle of production The axis orthogonal to the paper surface is repeatedly rotated to set the axis 9 and the axis 6 'to the needle rod drive shaft 6 to install the needle swinging arm 60. The needle rod 1 supported by the atm section is like the upper and lower support lining_ From =; =, towards the needle bar holder 12, the needle bar holds the knot smoothly. ♦ The front end of the needle swinging arm 60 extended toward the cymbal is connected to 1 3 and 5::: 1 needle bar drive shaft 6, needle swing The repeated rotation of the arm and the needle rod with the guard shaft 6 constitutes the driving mechanism of the needle rod 1. As the needle rod is driven, the needle rod is moved remotely via the needle rod ^ The needle swing arm 6 is placed up and down within a predetermined angle range浐 Cylinder stem 3 and island stick loser 12 convey the up and down movement of the oscillating needle stick 1: 3Λ3a, 3b. It shows a cross-sectional view of the head 20 and the direction of line 111 toward the door. As shown in the figure 3. It is added on the upper floor to one side of the upper frame 2 of the sewing machine. It is used to align the seam: within 卩. The transmission mechanism of the needle rod drive shaft 6 is lubricated. (The illustration is omitted) is used to supply the upper frame 2 and the head from the oil protection part not shown in the figure. The partition wall 24 between the members 丨 "is as shown in the table.

4406 30 V. Description of the invention (8) A " Wear and fix the oil supply pipe 25 in a position corresponding to the position of the front end of the needle swinging arm 60 at the inside of the head 20 and ^ position. An oil connection opening is provided on the protruding portion of the oil supply pipe 25 in the upper frame 2 so that the oil droplets of the lubricating oil scattered in the upper frame 2 can be used as shown in the figure by using the action of the transmission mechanism. It flows into the oil supply pipe 25 through this oil inlet. Then, a small-diameter oil supply opening is opened toward the protruding trajectory of the oil supply pipe 25 in the head 20 near the swing end of the needle swing arm, and the structure is such that it is used on the head outside the oil supply opening. The swing of the needle swinging arm 60 within 200 produces pressure, and the lubricating oil in the oil supply pipe 25 is sucked by the effect of the negative pressure, and it is shown by the arrow in the figure through the oil supply port to the head 20. Flying away. The front end of the needle swing arm 60 and the needle rod link j 3 of the needle rod holder 12 are connected in pairs by a hollow connection lock 14.纟 FIG. 3 shows a connecting portion of the needle bar holder 12 and the needle bar link 13. A felt 15 is buried in the * part of the connecting pin 14, so that the felt 15 is impregnated with the supply from the front end of the oil pipe holder = Part of the lubricating oil that is scattered from the mouth is supplied to the outer periphery of the connecting pin 14 to lubricate the needle bar holder 12 and the needle bar connecting rod n}, but the car body J β is connected to the front end of the needle swing arm 60 and the needle. The same is true for the link i 4 of the rod link 3. In addition, the lubricating oil sucked from the oil supply port at the front end of the oil supply pipe 25 = the entire area inside the head 20 is scattered, and the lubrication is scattered forward: the needle bar 1 and the upper and lower support bushings 3a, and the fitting of Park Part for moving the needle up and down. On the rear side of the support portion of the needle bar 丨, as shown in FIG. 2, a recess 26 protruding downwards is formed than the support portion, and the recess 26 is used in the structure to penetrate the partition wall 24 as shown in FIG. Oil drain holes 27 and up

Production of 'Boom 4 063 0', ------------------ ------- ________ V. Description of the invention (9) The internal communication of the frame 2 will be toward the head 20 The lubricating oil scattered in the lake and supplied to each part is concentrated in the recess 26 and returned to the upper frame 2 through the drain hole 27. In addition, inside the oil drain hole 27, an oil drain pipe 28 having a smaller diameter than that of the oil drain hole 28 is arranged so as to incline downward from the inside of the head 20 to the inside of the upper frame 2. The oil drain pipe 28 is bent forward and upward in the recess 26 as shown in FIG. 2, and is connected to the front wall of the recess 26 at a position lower than the support bushing 3b of the lower part of the support needle rod 1 and heads toward the head. 2〇 The lower part of the supporting bush 3b protruding from the outer side collects the lubricating oil 'recovered by the recovery device 4 constituted as shown below through the internal oil guide of the upper frame 2 which is not shown in the oil retaining section road. The oil drain pipe 28 shown in Fig. 3 is a hollow tube inside. The structure of the lubricant oil naturally flows inside the oil drain pipe 28 and is guided to the oil retaining portion to drain oil. Fig. 4 is a sectional view showing another embodiment of the drain pipe. A felt 29 is filled inside the oil discharge pipe 28 shown in FIG. 4, and the felt 29 is impregnated with the lubricating oil ' Here, in the case where this structure is adopted, the other end of the oil discharge pipe 28 is connected to a vacuum pump 'and the vacuum pump can be evacuated to improve the oil discharge. FIG. 5 is an enlarged cross-sectional view showing a main part of an embodiment of the recovery device 4. FIG. This recovery device 4 is similar to the recovery device 5 shown in FIGS. 1A and 1B. As described above, the recovery device 4 has a lubricating supply needle rod 1 on one side of the lower support bushing 3b (outside the head 20). As shown in FIG. 5, the lubricating oil attached to the peripheral surface of the needle bar 1 is recovered as a seal holder that surrounds the protruding portion of the needle bar 1 from the support bushing 3b outside the lower portion of the head 20. 40 of

Page 12 5. Description of the Invention (ίο) The seal ring 41 and the bias ring 42 are provided inside. The seal holder 40 is a solitary member having a through hole 43 through which the needle bar 1 can be inserted on the bottom surface. The bottom surface faces downward and is locked to the outer surface of the front wall of the recess 26 by a fixing screw 44. The outer surface of the lower portion of the head 20 protruding from the support bushing 3b is tightly attached, and is fixed in a state where the needle bar 1 is inserted through the through hole 43. The inside of the seal holder 40 fixed in this way is communicated with an oil drain hole 45 having a slope downward from the back side of u and formed through the wall in front of the recess 26. The open end of the oil drain hole 4 5 into the recess 26 is fitted to the end of the oil drain pipe 28 and the oil retained in the inside of the seal holder 4 is structurally passed through the oil drain hole 4 5 And the drain pipe 28 drains oil as shown above. In addition, in FIG. 5, the hollow oil drain pipe 28 is shown as shown in FIG. 3. However, as shown in FIG. 4, the oil drain pipe 28 filled with wool ft29 may be used. A recess 46 is formed inside the seal holder 40 coaxially with the through hole on the bottom surface and has a circular cross-section. The former ring 41 and the bias ring 42 are inserted into the recess 46 in the state where they are coaxially overlapped. Inside. Fig. 6 is an enlarged sectional view near the installation position of the seal ring and the bias ring. As shown in FIG. 6, the seal ring 41 on the ^ side is a ring with a rectangular cross section provided with a wedge-shaped tongue portion protruding inward on its inner surface ring, so that the front edge of the tongue portion 41 a contacts the seal holder 40. The peripheral surface of the needle bar 1 of the shaft center portion is provided with a predetermined gap between the upper surface of the sealing loss limit 401 and the outer surface of the lower portion of the tightly-connected head 20. The outer biasing ring 4 2 is a ring having a circular cross section. The sealing ring 41 is inserted between the outer surface of the sealing ring 41 and the inner surface of the recess 46 in an elastically deformed state between the two surfaces. Apply an inward biasing force on the outside. '

Page 13 ^ 06 3 0 V. Description of the invention (11) With the structure as described above, the inner surface of the seal ring 41, that is, the inner peripheral edge of the tongue portion 4a becomes the biasing force of the bias ring 42 on the outside. In the state pressed against the peripheral surface of the needle bar 1, the lubricating oil adhered to the peripheral surface of the needle bar 1 is scraped and caught by the inner peripheral edge of the tongue portion 41a, and does not leak to the outside of the support bushing 3b. The lubricating oil captured in this way is retained with the tongue 41 a as the bottom surface, as shown by the arrow in FIG. 5, and is guided rearward along the inclination of the mounting portion of the seal ring 41 to the outside of the lower part of the head 20 As shown above, it flows out through the ensured gap and flows into the drain pipe 28 through the drain hole 45 opened at the position. As shown above, it drains to the oil protection part inside the upper frame 2. oil. Then, in the recovery device 4 of the sewing machine of the present invention, the lubricating oil attached to the peripheral surface of the needle bar 1 as a sliding shaft is captured as if scraped on the inner surface of the seal ring 41 pressed against the peripheral surface, and passes through the path described above. Courtesy recycling. In addition, because the inner surface of the seal ring 41 facing the needle bar 1 is pressed by the bias of the bias ring 42 which is elastically connected to the outer surface of the seal ring 41, the capture is more reliable. In addition, because the captured lubricating oil does not infiltrate the seal ring 41 and stagnates on the upper portion, it does not have to accompany the slippage of the needle bar 1 and leaks out, and it can be recovered for a long period of time. The sealing ring 41 having the above-mentioned effect keeps the sliding resistance of the needle bar 1 low in the above-mentioned pressing state, and minimizes the deterioration accompanying the sliding itself. It also requires financial properties for the lubricating oil. For these realized materials, it is desirable to use a fluororesin such as Teflon (Poly Tetra Fluoro Ethylene), which has a small friction coefficient, excellent abrasion resistance and oil resistance. It ’s also required that the bias ring 4 2 give sufficient pressure to the seal ring 41

6 3 Q V. Description of the invention (12) ^ 2 I want to use elastic rubber. In addition, the # seal ring 41 is the same, because: to have sufficient resistance to the full oil retained in the upper part of it, it is best to use artificial Made of rubber with excellent oil resistance such as rubber. FIG. 7 is an enlarged sectional view showing the main part of the second embodiment of the recovery device 4. The recovery device 4 is provided with a sealing holder 4 on the outside of the lower part of the head 20 and surrounding the protrusion of the needle rod i from the support bushing 3b. As shown in FIG. 7, two sets of the seal ring 41 and the bias ring 42 are not stacked on the inside. The respective structures of the seal ring 41 and the bias ring 42 are the same as those of the first embodiment shown in FIG. 5 and FIG. 6. The stacking is shown in FIG. 7. The directions of the upper and lower seal rings 41 and 41 are opposite, more specifically. The directions of the tongue portions 41a, 41 ^ on the inner surface are opposite. In the recovery device 4, the upper seal ring 41 of the upper and lower seal rings 41, 41 has the same function as that of the first embodiment, and has the function of capturing the peripheral surface of the needle rod i = lubricating oil = When the sealing ring 41 protrudes below the support bushing 3, it blocks foreign matter such as swarf adhered to the outer surface of the needle bar 丨 and has a sealing ring 41 for preventing the needle bar 丨 and the upper part of the sealing ring 41 and the sliding contact portion of the support bushing 3b The intrusion acts as a foreign body seal. Because of this, it is maintained so as not to hinder the capture effect of the upper seal failure 41 on the lubricating oil, so that the above-mentioned recovery of the lubricating oil can be performed well. In addition, in Embodiment 1 shown in FIG. 5 and FIG. 6, the lower edge of the tongue portion 41a of the sealing ring 41 has a foreign body sealing effect, which can prevent the intrusion of foreign objects, but in order to improve the edge blocking effect, as shown in FIG. 7, All that is required is to have the upper and lower seal rings 41, 41. In addition, in FIG. 7, a pair of

Page 15 Λ06 30 V. Explanation of the invention (13) Sealing rings 41, 4 1 Inward false wishing description _ / 0 y Heart 9 ^ Bias structure, but using a single partial ring ring 42-up ^ pair It is also possible to use the ring 41... Bias structure. In addition, the pair of seal rings 41 and 41 shown in Fig. 7 have an inner mask-like effect. On the tongue of the leather-the seal pure 'this can get a correct / on the / of the / Λ example' illustrates the recovery of the lubricant 4 attached to the peripheral surface of the needle rod 1 as a sliding shaft Structure, but this 4 can be applied to the entire sliding shaft that slides on each part of the sewing machine. Device Fig. 8 is a perspective view showing an application example of the recovery device as described above on the support portion of the looper rod. In the figure, the inside of the frame 8 which is a machine that acts as a rotating shaft slides in the pumping direction, so that the lower frame 8 installed at the end of the frame 8 has a looper chamber 80 with a looper 70 and a parallel chamber on its side. Set up the institution room 81. The looper rod 7 is inserted through a cylindrical support bushing 3C fixedly mounted on the looper ㈣ and the mechanism chamber 8 and the partition wall 82, and is supported in the axial direction, and a looper drive mechanism 71 formed inside the chamber 81 In connection, the well-known action of the 1 = mechanism 71 is to move the bushing & as a guide to make two movements to make the protruding looper installed in the looper? ()advance and retreat. See the internal supply of the J structure chamber 81 to lubricate the looper drive mechanism 71, and the door; part of this lubricant is in the direction of the supporting bushing 3c: the peripheral wall of the protrusion has an opening 2 ~ shaft through its upper part On the other side of the liner 3c (toward the protruding side in the looper chamber 80), a recovery device f is provided.

Page 16 V. Description of the invention (14) 4 〇

Fig. 9 is an enlarged cross-sectional view near the support portion of the looper 7A. The recovery device 4 and the recovery dream shown in FIG. 5 and FIG. 6 are provided with a sealing ring 41 and a value inside the team device 40: like, in the shape of a dish holder * and a bias ring 42 . After the seal holder 40 is inserted through the partition wall 82 and supporting the bushing 3c protruding inside the looper chamber 80, the opening side of the seal sealing holder 40 is locked by the fixing screw 47 so as to surround the opening from the end. The protruding part of the looper 7. The inside of the seal holder 40 is in direct communication with the oil drain 8 which is engaged with the lower portion of the peripheral surface and the provided portion. 4 The structure of the seal ring 41 and the bias ring 42 inside the oil seal clamping benefit 40 is the same as that of the embodiment shown in FIG. 5 and FIG. 6 in terms of the installation form. The sealing ring 41 is biased, and the wedge-shaped tongue provided on the inner surface of the dense 41 is pressed against the looper? The peripheral surface 'is captured like a lubricating oil attached to the peripheral surface of the looper rod 7 and prevents leakage to the outside of the support bush 3c. The lubricating oil captured in this way is concentrated in the lower portion of the seal holder 40, and is guided and protected via the drain pipe 48 communicating with the position; and recovered. .... Fig. 10 is an enlarged sectional view of the implementation device 2 of the recovery device 4 which is not on the support portion of the looper rod 7. This recovery device 4 and the second embodiment of the supporting part of the needle bar 丨 (Fig. 7)-the sealing ring 41 and the biasing ring are arranged inside the sealing stopper 40 installed to surround the protruding part of the loop bar γ 42 sets of 2 sets are installed in the axial direction of the looper rod 7, and the seal ring 41 on the structure mechanism mechanism 81 side has the function of an oil seal to capture the sliding rule attached to the peripheral surface of the looper rod 7, and the looper chamber 8 The sealing ring 41 on the side has a function of catching the looper rod 7 attached to the looper chamber 80.

Page 17 4 In 〇6 3 〇 5. Description of the invention (15) Sealing effect of foreign matter on the peripheral surface In addition, in the embodiment shown in Fig. 9 and Fig. 10, the looper will be supported? The support = the end of the bushing 3c is used as a fixing part of the seal holder 40, but, like the recovery device 4 on the needle support part, it can also be constructed in the movable chamber 80 and the mechanism chamber 81. The partition wall 82g] defines a protrusion of the seal holder 4Q1. In the above embodiment, the Okamachi support part can be configured to use a seal clamp 40 provided separately from the support 2 lining 3b of the needle bar 1 or the support bush 3c of the looper bar 7 to form a seal inside. The ring 41 and the bias ring are sealed holders. However, a part of the support bushings 3b and 3c is used to form a seal holder. The seal ring 41 and the bias ring 42 can also be held in this structure. The above-mentioned effect is obtained. In the sewing machine of the present invention as described above, the seal ring biased from the outside by the bias ring is structured to be lubricated by the lubricating oil from one side of the support bushing. On the peripheral surface of the protruding part on the other side of the sliding shaft, the sealing ring is used to capture the lubricating oil attached to the peripheral surface and then guide the oil guard to securely capture and recover the lubricating oil. Foreign matter attached to the peripheral surface of the sliding shaft will not invade and support the sliding contact part of the bushing, and it will surely prevent the lubricant from leaking to the other side of the supporting bushing, which can make long-term stable sliding. ^ 'Monthly, The friction ring is used for the seal ring slidingly connected to the sliding shaft. Made of fluororesin with a small number, excellent abrasion resistance and oil resistance, the% elastic contact with the seal ring is made of rubber with high elasticity, and the seal ring is strongly pressed on the peripheral surface of the slide shaft under the suppression of the action on the slide shaft For more accurate capture and

P.18 3〇 5. Description of the invention (16) Recovery of lubricating oil. As shown above, because the support part of the needle bar and looper that slides at high speed during the sewing operation is provided with a recovery device equipped with a sealing ring and a bias ring, these needle bars and loopers are important parts of the sewing machine. The long-term operation of the rod is good. 5 It is easy to adapt to an increase in the sewing speed, etc., and the present invention exhibits excellent effects. In the above, the embodiments described in the detailed description of the invention are completely to clarify the technical content of the invention. The invention is not narrowly interpreted to be limited to such specific examples. In the spirit and application of the invention Various changes can be made within the scope of the patent scope.

Page 19

Claims (1)

k 44 06 3 0 乂 六 、 Usui Patent Fanyuan 1. Kind of sewing machine, characterized in that it includes: a sliding shaft, inserted through a cylindrical support fixed on a part of the sewing machine frame, and is supported 'and is supported in the Use the lubrication provided to one side of the support bushing to slide in the axial direction; " and Feifeng holder section, on the other side of the support bushing is arranged to surround the protruding portion of the sliding shaft; sealing ring ' It is held in the seal holder part and is in sliding contact with the peripheral surface of the sliding shaft. The inner surface captures the lubricating oil attached to the peripheral surface on one side of the support bushing; the bias ring, and the outer surface of the seal ring The spring is pressed and the seal is produced on the peripheral surface of the sliding shaft; and the inner oil guiding path of the garment is a lubricating oil part captured on the inner surface of the seal ring. Punching guide 2. The sewing machine according to item 1 of the patent application, wherein the close-fitting is made of fluororesin and the bias ring is made of rubber. 't ring mining 3. If the patent application scope of the first or second sewing machine, where the & is used to slide, order to install on the other side of the support bush * 2 β pin up and down needle Baton. Needle in particular 4. If the sewing machine in the first or the second of the scope of patent application is applied, the upper part uses the sliding sleeve to move the + f sliding sleeve to the other side of the supporting bushing. Baton. % Out of Life Page 20