JP2005532860A - Sewing machine with shock absorber - Google Patents

Abstract

In the sewing machine, in order to buffer the torsional vibration of the shaft (38) that performs the oscillating motion, the shaft is surrounded by a sleeve (41) that is fixed in position. A slit (43) is formed between the shaft (38) and the sleeve (41). The slit (43) is filled with a viscous substance (24) and sealed by a sealing element (44). When the shaft (38) and the sleeve (41) move relative to each other, the viscous material generates viscous friction to buffer the vibration.

Description

  The present invention relates to a sewing machine including a transmission member that intermittently performs a vibration motion and at least one shock absorber for reducing vibration generated by the transmission member.

  It is known that in a sewing machine, a shaft that drives a stitch forming and feeding means that performs vibrational motion or intermittent motion tends to cause torsional vibration. Due to such vibration, the transmission member affected by the vibration is worn out at an early stage, or an overshoot of the stitch forming feeding means occurs. As a result, for example, a zigzag movement of the needle bar becomes inaccurate, or in the case of a sewing machine equipped with a cloth feed that performs a square movement, the feed amount increases as the number of rotations of the sewing machine increases, so that the stitch length is growing.

  Patent Document 1 discloses many proposals for buffering this type of torsional vibration. For example, FIG. 13 shows a shock absorber for a vibration shaft, which has a sleeve surrounding the vibration shaft. One end of the sleeve is fixedly coupled to the vibration shaft, while the other end is frictionally coupled to the vibration shaft, so that the magnitude of the frictional force can be adjusted. When the vibration shaft is twisted by the action of torsional force, a relative motion is generated between the vibration shaft and the other end frictionally coupled to the vibration shaft. The braking force generated at that time cushions the generation of torsional vibration.

  However, this type of shock absorber has decisive drawbacks. Since wear occurs at the frictional connection between the sleeve and the vibration shaft, the set frictional force gradually changes, and as a result, new adjustments must be made again and again to ensure the desired buffer action. Moreover, if a certain wear limit is exceeded, the vibration shaft and / or sleeve must be replaced.

  FIG. 6 of Patent Document 1 shows a disk type shock absorber. This shock absorber has a disk-like inertia member that is loosely and rotatably provided on the hub of the upper shaft. The inertia member is surrounded by a closed housing fixedly connected to the upper shaft and filled with a viscous material. As the housing rotates, the inertia members are driven together at substantially the same speed. When the upper shaft is twisted by the action of a torsional force, the inertia member reacts against the direction change and the speed change that occur at that time, thus suppressing the occurrence of torsional vibration. Since the inertia member must have a relatively large diameter and a relatively large mass in order to obtain a sufficient buffering action, this disk type shock absorber requires a very large space. It is actually impossible to provide the inside of the sewing machine housing.

  Patent Document 2, which is considerably newer than Patent Document 1, relates to a drive mechanism for a needle bar vibration drive device of a zigzag sewing machine. Various solutions have been disclosed for buffering the vibration of the transmission member of the drive mechanism. In the first embodiment of the shock absorber shown in FIGS. 2 to 5, the fork-like lower end of the vibration shaft is supported by an eccentric pin that is rotatably supported, and the eccentric pin is a leaf spring that protrudes in the radial direction. It is fixed to be able to bend through. Since the direction of rotation of the drive member for the vibrating lever constantly changes, the frictional force generated at the end of the lever twists the eccentric pin, thus bending the leaf spring. For this reason, relative motion occurs between the leaf spring and the two raised opposing support members. This relative motion is very slight, but wears prematurely due to frictional corrosion. Furthermore, this type of shock absorber is very expensive to manufacture and assemble.

  In another modified embodiment of the shock absorber disclosed in Patent Document 2, an eccentric pin, a leaf spring, or a vibration lever is supported on the housing side via an elastic hard rubber member. Such a component is subject to a hysteresis action, thereby impairing the transmission accuracy of the drive movement.

Federal Republic of Germany Patent Publication No. 1012809 US Pat. No. 6,058,862

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vibration damping device that can be configured in a space-saving manner and that operates reliably without wear in a sewing machine provided with stitch formation feed means that performs vibration motion or intermittent motion.

  This problem is solved by the configuration described in claim 1.

  The technical idea of the present invention according to the above solution is that the drive mechanism of the slit forming means and / or the feeding means is formed so that a narrow but large-slit slit is formed that is filled with a viscous substance and hermetically sealed. By tightly enclosing the transmission member carrying out the rotational or translational movement with a capsule, liquid vibrations prevent additional vibrational movements superimposed on the vibrational movement or the actuating movement of the transmission member performing intermittent movement in the longitudinal direction, for example. There is to do.

  In this case, the buffering action relies on the internal displacement of the viscous material consuming a certain force between the boundary layers of the viscous material on the slit surface. At that time, the viscous friction generated inside the viscous material is proportional to the speed. In other words, when exercise starts from a stationary state, there is no movement resistance for the time being. The movement resistance is generated only when the movement is gradually increased, and the movement resistance is maximized when the movement speed is also maximized. That is, in the case of viscous friction, unlike the case of mechanical friction, it is not necessary to overcome the initial static friction, so that an ideal situation exists for buffering vibrations over the entire rotational speed range of the sewing machine.

  The shock absorber according to the present invention consists essentially of a capsule that surrounds the transmission member to be buffered, and the capsule is arranged at a very small distance from the transmission member in order to form a narrow slit. A very space-saving configuration is possible. Such a space-saving shock absorber can therefore also be arranged at the location of the housing, where the available space is already fully occupied by the assembled device and / or transmission element.

  Claim 2 shows the basic construction of the shock absorber according to the invention for a shaft that performs an oscillating motion, with a long sleeve utilizing the given length of the shaft and the slits necessary for better buffering results. This is advantageous because a large area can be obtained.

  To achieve this, according to claims 3 and 4, when the vibration shaft for the needle bar vibration device is supported in the housing arm, and the feed shaft for the cloth feed drive device is arranged in the substrate. In this case, each sleeve extends over a maximum distance between the respective support parts of the shaft or between the pivot parts of the other transmission members. In this case, since the position of the axis is almost unchanged, its inertia does not change.

  When the shaft is supported to the sleeve via the roller bearing as proposed in claim 5, it is not necessary to pay attention to the requirements for configuring the roller bearing when configuring the shock absorber. On the other hand, when the shock absorber is also configured as a sliding bearing for the shaft at the same time, in addition to an appropriate combination of materials, it is necessary to take care that the viscous material has excellent lubrication characteristics other than the buffer characteristics. .

  In order to compensate for the negative viscosity and temperature characteristics of general liquids, and thus also for the negative viscosity and temperature characteristics of viscous materials, according to claims 7 and 8, the components forming the slit are subjected to temperature expansion. It is formed from materials with different coefficients. That is, when the viscosity of the viscous material becomes lower as the temperature of the sewing machine increases, the slit becomes narrower due to the use of materials having different expansion coefficients, and as a result, the degree of buffering becomes substantially constant over a wide temperature range.

  As proposed in claim 9, when the light metal tube is arranged on the shaft with a pin so that an active outer slit and a passive inner slit are formed, the outer active slit is formed as a result of the temperature rise. Viscous material that is pushed out of the outer active slit when it narrows can escape into the passive inner slit.

  According to the configuration of the tenth aspect, it is possible to easily and quickly fill the slit with a viscous material again or again.

  If the length of the transmission member that is the object of vibration damping is too short to obtain a sufficiently large slit area using the sleeve, according to claims 11 and 12, in addition to the circumferential radial slit, or Instead of this slit, one or more slits can be formed in the correspondingly formed chamber of the sleeve. When the chamber is filled with the viscous material, the vibration damping action similar to that of the radial slit on the circumferential side can be obtained.

  The thirteenth aspect describes the basic structure of the shock absorber according to the present invention for a feed base that intermittently performs linear motion.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
A sewing machine housing 1 indicated by a broken line in FIG.

  An upper shaft 6 is supported in the arm 4. The upper shaft 6 carries a belt pulley 7 also used as a flywheel at one end and a crank 9 having a mass balance weight 8 at the other end. The crank 9 is drivingly coupled to a needle bar 11 supported by a needle bar vibration driving device 10 and is also coupled to a link balance 12. A needle 13 for guiding the thread is fixed to the needle bar 11. The needle 13 cooperates in a known manner with a looper (not shown) arranged in the substrate 2.

  The needle bar vibration drive device 10 is one component of the needle transport mechanism 14. The needle transport mechanism 14 has a vibration shaft 15 disposed in the arm 4, one end of the vibration shaft 15 is coupled to the needle bar vibration drive device 10 via a crank 16, and the other end is eccentric via a crank 17. Combined with the rod 18. The eccentric rod 18 can be driven by a stepping motor 19.

  A shock absorber 20 is attached to the vibration shaft 15. The shock absorber 20 has a long sleeve 21, which surrounds the vibration shaft 15 and is fixed to the housing 1 using a screw pin 22. A long ring-shaped slit 23 having a thickness of approximately 0.05 mm is formed between the sleeve 21 and the vibration shaft 15. The slit 23 is filled with a viscous material 24 (for example, a highly viscous chain lubricant), and both ends thereof are sealed with O-rings 25 respectively. In FIG. 2 and FIG. 3, only a part of the viscous material 24 is shown for easy understanding of the drawings, but actually, the slit 23 is completely filled.

  The sleeve 21 is also used as a carrier for the vibration shaft 15. In this case, the vibration shaft 15 is supported on the sleeve 21 via two needle bearings 26. In order to obtain a space-saving configuration, the needle 27 held in the needle cage rolls directly on the vibration shaft 15 and on the inner peripheral surface of each one larger diameter hole 28 provided in the sleeve 21. Roll directly. Reference numeral 29 denotes a position adjusting ring for determining the position of the vibration shaft 15 in the axial direction.

  The upper shaft 6 is drivingly coupled to a lower shaft 31 supported in the substrate 2 via a belt drive 30. The lower shaft 31 is also used as a lifting shaft, that is, it causes a lifting movement with respect to the cloth feed 33 arranged on the cloth feed carrier bar 34 via the eccentric drive device 32. An eccentric drive device 35 disposed on the lower shaft 31 is coupled to a link type feed adjusting member 36. A crank 37 used as a driven element of the link type feed adjusting member 36 is fixed to one end of the feed shaft 38. The other end of the feed shaft 38 is fixed with a crank 39 that is pivotally attached to the cloth feed carrier bar 34 and applies a feed motion to the cloth feed 33.

  A shock absorber 40 is attached to the feed shaft 38. This shock absorber 40 corresponds in principle to the shock absorber 20 for the vibration shaft 15. Therefore, the shock absorber 40 has a long sleeve 41 that surrounds the feed shaft 38 and is fixed to the substrate 2 by the screw pins 42. A long ring-shaped slit 43 having a thickness of approximately 0.05 mm is formed between the sleeve 41 and the feed shaft 38. The slits 43 are filled with the same viscous material 24 as the slits 23, and their ends are sealed with O-rings 44, respectively.

  The sleeve 41 is also used as a carrier for the feed shaft 38, in which case the feed shaft 38 is supported relative to the sleeve 41 via two needle bearings 45. The needle 46 held in the needle cage rolls on the feed shaft 38 and rolls on the inner peripheral surface of each one hole 47 of the sleeve 41.

  When the sewing machine operates, a motor (not shown) that is drivingly coupled to the belt pulley 7 rotates the upper shaft 6. This rotational motion is transmitted to the lower shaft 31 via the belt drive 30, and causes the cloth feed 33 to perform a square motion that combines the lifting motion and the feed motion. In this case, the length of the feed movement is determined by appropriately adjusting the feed adjustment member 36, and therefore the feed amount of the cloth feed 33 or the stitch length of the seam to be formed is determined. At the same time, the stepping motor 19 drives the needle transport mechanism 14 to generate a feed movement of the needle bar 11 synchronized with the feed movement of the cloth feed 33 when the needle 13 is punctured into the sewing product.

  Both shock absorbers 20 and 40 cause viscous friction in the viscous material 24 in the slits 23 and 43 when the vibration shaft 15 and the feed shaft 38 vibrate and perform a rotational motion. The magnitude of this viscous friction depends on the thickness of the slits 23, 43, the area of the slit surface, and the viscosity of the viscous material 24. Viscous friction occurs both in the case of the action motions carried out by the vibration shaft 15 and the feed shaft 38, that is, in the feed motions carried out by each, and also in the case of additional uncontrollable torsional vibrations superimposed on this feed motion. In this case, the action motion of the vibration shaft 15 and the feed shaft 38 is accurately performed with respect to time and distance by overcoming viscous friction by the stepping motor 19 and the feed adjusting member 36. On the other hand, the viscous friction brakes the vibration shaft 15 and the feed shaft 38 which are going to rotate further beyond the movement reversal point determined by the set feed amount of the needle bar 11 and the cloth feed 33, and in this way additionally. The superimposed torsional motion is buffered.

  5 and 6 show a shock absorber 40.1 associated with the shock absorber 40 so as to compensate for the negative viscosity and temperature effects of the viscous material 24. FIG. For this reason, in the shock absorber 40.1, a pipe 48 made of a light metal (for example, aluminum) is provided on a feed shaft 38 made of steel. The tube 48 is connected to the feed shaft 38 so as not to rotate relative to the feed shaft 38 by using a pin 49 and a parallel key 50 that pass therethrough. The slit 51 filled with the viscous material 24 is formed between the light metal tube 48 and the inner surface of the sleeve 41 made of steel.

  As the temperature increases, the viscosity of the viscous material 24 decreases. That is, the viscous material 24 has a somewhat lower viscosity. As a result, the viscous frictional resistance of the viscous material 24 is reduced. Since the thermal expansion coefficient of light metal is larger than that of steel, the slit 51 becomes narrow as the temperature rises. Thereby, the viscous frictional resistance inside the slit 51 is increased again. Since the action of the slit thickness change with temperature is in the opposite direction to the action of the viscosity change with temperature, the two actions at least partially cancel each other. As a result, in the shock absorber 40.1, the degree or degree of vibration damping is maintained sufficiently constant over a wide temperature range.

  In the case of the shock absorber 40.1, when the slit 51 becomes narrow, a part of the viscous substance 24 is pushed out toward the O-ring 44 in the axial direction. For this reason, the O-ring 44 is advantageously arranged so as to be movable. In the shock absorber 40.2 shown in connection with the shock absorber 40.1 in FIGS. 7 and 8, a special solution is proposed for receiving the viscous material 24 which is pushed out when the slit 51 becomes narrow. In this case, the light metal tube 48.1 which is similarly coupled to the feed shaft 38 so as not to rotate relative to the feed shaft 38 using the pin 49 and the parallel key 50 not only forms the outer slit 51 with respect to the sleeve 41 but also the feed shaft 38. The inner slit 52 is also formed. The slits 51 and 52 communicate with each other through a plurality of lateral holes 53. Since viscous friction occurs only in the outer slit 51, the outer slit 51 is an active slit. On the other hand, the inner slit 52 is a passive slit. When the temperature rises, the light metal has a larger coefficient of thermal expansion, so that the width of the outer slit 51 gradually becomes narrower, and the viscous material 24 pushed out from the outer slit 51 passes through the lateral hole 53 and becomes larger due to the temperature. Flows into the slit 52. When the temperature returns, the flow direction is reversed.

  FIG. 9 shows another modified embodiment related to the shock absorber 40 of FIG. In the case of this shock absorber 4.03, the feed shaft 38.1 has a vertical hole 54. The vertical hole 54 communicates with the slit 43 between the feed shaft 38.1 and the sleeve 41 through the horizontal hole 55. The end of the vertical hole 54 is closed by a lubricating nipple 56 that acts as a check valve. In the case of this shock absorber 40.3, the slit 43 can be particularly easily filled with the viscous substance 24, and refilling is possible if the viscous substance 24 flows out somewhat from the slit 43 and the O-ring 44. is there.

  The shock absorber 57 shown in FIGS. 10 and 11 is attached to a feed shaft 38.2 to which a crank 39 is fastened and fixed using a fastening ring 58. The feed shaft 38.2 is supported in a sleeve 59 which is fixedly arranged in the housing using two needle bearings 45. The sleeve 59 has a chamber 60 that is radially enlarged and open on one side. The inner side wall 61 of the chamber 60 is aligned with the shoulder 62 of the feed shaft 38.2.

  A plurality of disks 63 are arranged in the region of the chamber 60 on the feed shaft 38.2. These disks 63 are separated from each other by a spacer ring 64. The disk 63 on the feed shaft side is pressed against the shoulder 62 of the feed shaft 38.2 by the screw 65, the pressing ring 66, the already described tightening ring 58, the intermediate ring 67 and the other intermediate ring 68. As a result, the disk 63 on the feed shaft side is coupled to the feed shaft 38.2 so as not to rotate relative thereto.

  A plurality of sleeve-side disks 69 are engaged between the feed shaft-side disks 63. The sleeve side disks 69 are also separated from each other by the spacer ring 70. The sleeve-side disc 69 is pressed against the wall 61 of the chamber 60 by a threaded ring 71, whereby the sleeve-side disc 69 is coupled to the sleeve 59 so as not to rotate relative thereto.

  A narrow slit 72 in the axial direction is formed between the wall 61 and the disk 63 adjacent thereto and between the disks 63 and 69 arranged side by side. In the chamber 60, therefore, the slit 72 is also filled with the viscous material 24. Also in the embodiment illustrated in FIG. 11, only a part of the viscous material 24 is illustrated for easy understanding of the drawing. In practice, the viscous material 24 completely fills the slit 72 and the remaining hollow space of the chamber 60. The chamber 60 is sealed by an O-ring 73 provided between the threaded ring 71 and the intermediate ring 68 and an O-ring 74 provided between the sleeve 59 and the feed shaft 38.2.

  When the sewing machine is actuated, a relative movement occurs between the disk 69 on the sleeve side that is stationary and the disk 63 on the feed shaft side that is oscillating. At this time, the shock absorber 57 generates viscous friction in the viscous material 24 in the slit 72. The size depends on the thickness and size of the slit 72, that is, the total slit area in this case, and the viscosity of the viscous material 24, as in the case of the shock absorbers 20 and 40 described above. Therefore, the shock absorber 57 also causes a buffer action when torsional vibration of the feed shaft 38.2 occurs, thereby reducing the risk of overshoot of the cloth feed 33.

  FIG. 12 is a schematic view of a part of the buttonhole sewing machine. A housing 80 indicated by a one-dot chain line includes a substrate 81, a pedestal 82, and an arm 83, and the arm 83 moves to the head 84. A support rod 85 that can move up and down for the guide 86 of the sewn product holder 87 is supported in the arm 83. The guide 86 has a U-shaped guide plate 88 in cross section, and the guide plate 88 is fixed to the support rod 85 via two intermediate members 89 and one support plate 90. A flat sealing plate 91 is screwed to the lower surface of the guide plate 88. The sealing plate 91 and the guide plate 88 form a guide pipe line 92 (FIG. 14). A sliding plate 93 that is movable in the longitudinal direction is supported in the guide duct 92. A support block 94 is screwed to the upper surface of the sliding plate 93, and the support block 94 extends upward through a vertically long withdrawal portion 95 inside the guide plate 88.

  A bent carrier arm 96 is screwed to the carrier block 94. The carrying arm 96 carries the foot plate 97 of the sewing product holding body 87 at the other end. A drive rod 99 is pivotally attached to the support block 94 via a support pin 98. The other end of the drive rod 99 is coupled to the crank 100, and the crank 100 is fixed to the shaft 101 of the stepping motor 102 disposed in the housing 80.

  Between the inner surface of the guide plate 88 and the sliding plate 93 and between the inner surface of the sealing plate 91 and the sliding plate 63, there is a narrow slit 103 filled with the viscous material 104. Since the guide plate 88 and the sealing plate 91 form a sliding bearing together with the sliding plate 93, the viscous material 104 has a high viscosity, and therefore must not only be highly viscous but also have excellent lubricity. I must. For this purpose, a highly viscous chain lubricant is suitable.

  A flat container 105 is provided to seal the guide 86. The container member 105 tightly surrounds the lower surface of the sealing plate 91 and the side wall of the guide plate 88, and is fixed to the guide plate 88 by a plurality of screws 106. The withdrawal portion 95 is sealed using a flat cover plate 107 fixed to the carrying block 94. Two flat compensation pipes 108 extending in the longitudinal direction are formed on the upper surface of the sliding plate 93. The guide 86 forms a shock absorber 109 together with the slit 103 filled with the viscous material 104, the container-like member 105, and the cover plate 107.

  The intermittent rotational movement generated by the stepping motor 102 is transmitted to the simple vertical movement of the sliding plate 93 in the fixed position guide 86 via the crank 100 and the drive rod 99, whereby the sewing product holding body 87 is moved. Carry out a feed movement according to the required stitch length.

  The shock absorber 109 causes viscous friction of the viscous material 104 in the slit 103 during intermittent movement of the sliding plate 93. The size depends on the thickness of the slit 103 and its size, that is, the total slit area and the viscosity of the viscous material 104. In this way, the shock absorber 109 can buffer the vibration generated between the shaft 101 and the sliding plate 93 inside the drive train, and thus the overshoot of the sewn product holder 87 can be prevented.

  In this case, the compensation line 108 enables the pressure balance of the air confined in the guide 86 during the movement of the sliding plate 93. Further, at the end position of the sliding plate 93, the viscous material 104 flowing out from the slit 103 is pushed into the compensation pipe line 108, and from there, it can return to the upper slit 103 again. This allows the viscous material 104 to be uniformly distributed in all four slits 103.

It is the schematic of the stitch formation feed means of a sewing machine provided with the buffer device for transmission members which perform a vibration motion. It is a schematic enlarged view of a needle bar vibration drive device provided with a shock absorber and an attached vibration shaft. FIG. 3 is an enlarged sectional view taken along line II-II in FIG. 2. It is a schematic enlarged view of the feed shaft provided with the buffering device. It is the schematic corresponding to FIG. 4 of the feed shaft provided with 1st modified embodiment of the buffering device. It is an expanded sectional view by line VI-VI of FIG. It is the schematic corresponding to FIG. 4 of the feed shaft provided with 2nd deformation | transformation embodiment of the buffering device. FIG. 8 is an enlarged detail view of FIG. 7. It is the schematic corresponding to FIG. 4 of the feed shaft provided with other deformation | transformation embodiment of a buffering device. It is the schematic of the feed shaft provided with the buffer device which has the slit of an axial direction. It is an expanded sectional view of the shock absorber of FIG. It is a perspective view of the drive mechanism of the button clamp provided with the buffering device for a feed stand which performs intermittent motion. It is sectional drawing by line XIII-XIII of FIG. FIG. 14 is a cross-sectional view taken along line XIV-XIV in FIG. 13.

Claims (13)

A housing (1; 80);
Stitch forming and feeding means (15, 38; 93) for performing vibrational motion or intermittent motion;
A transmission member supported in the housing (1; 80) and coupled to the stitch forming feed means (15, 38; 93), the transmission member generating or transmitting the vibration or intermittent movement;
At least one capsule (21, 41; 59, 86) fixed to the housing (1; 80) and surrounding one component (15, 38; 93) of the stitch-forming feed means for oscillating or intermittent movement When,
Narrow and wide slits (23, 43; 51; 72; 103) formed between the capsule (21, 41; 59, 86) and the one component (15, 38; 93);
A viscous substance (24; 104) filled in the slit (23, 43; 51; 72; 103);
Sealing elements (25, 44; 73, 74; 105, 107) for sealing the slits (23, 43; 51; 72; 103);
Sewing machine equipped with. The capsule is formed as an elongate sleeve (21, 41; 59) to cover the vibrating shaft (15, 38) or to buffer the vibration of the vibrating shaft (15, 38). 41; 59) according to claim 1, characterized in that it is sealed against the shaft (15, 38) via two packing rings (25, 44; 73, 74) provided in its end regions. The described sewing machine. A needle bar (11) supported so as to be able to vibrate, and a vibration drive unit (17, 17) coupled to the needle bar vibration drive unit (10) via a shaft (15) supported in the housing arm (4). 18) The sewing machine according to claim 2, comprising:
The oscillating shaft that is the object of buffering vibration is the shaft (15) used to drive the needle bar vibration drive device (10), and the sleeve (21) extends into the housing arm (4) over the maximum distance. A sewing machine characterized by being present. It has a cloth feed (33) arranged on the cloth feed support bar (34) as a feed means, and the cloth feed (33) is square via a lifting shaft (31) and a feed shaft (38) driven by vibration. 4. Sewing machine according to claim 2 or 3, wherein the stitch adjustment member (36) is connected to the feed shaft (38) via a follower member (37) by performing a movement.
The vibrating shaft that is the object of buffering vibrations is the feed shaft (38), and the sleeve (41) is pivotally attached to the follower member (37) of the stitch adjusting member (36) and the cloth feed carrier over the maximum distance. Sewing machine, characterized in that it extends between the pivot point of the crank (39) relative to the bar (34). A sleeve (21, 41; 59) is formed as a carrier for the oscillating shaft (15, 38), which is a target for damping vibration, and the oscillating shaft (15, 38) is a roller bearing (26, 45). The sewing machine according to any one of claims 2 to 4, characterized in that the sewing machine is supported on the sleeve (21, 41; 59) via a). The sewing machine according to any one of claims 2 to 4, wherein the sleeve is configured as a part of a long sliding bearing, and the viscous material is also used as a lubricant for the sliding bearing. . The constituent members (41, 48) forming the slit (51) are made of materials having different temperature expansion coefficients, and the slit (51) is configured to be narrowed when the temperature rises. Item 7. The sewing machine according to any one of Items 1 to 6. The shaft (38) and the sleeve (41) are made of steel, and a light metal tube (48) is arranged on the shaft (38) so as not to rotate relative to the shaft (38). The sewing machine according to claim 7. A light metal tube (48.1) is secured on the shaft (38) using a laterally extending pin (49) and a parallel key (50), and the outer surface of the light metal tube (48.1) and a sleeve (41) An active slit (51) is formed between the inner surface of the light metal tube (48.1) and the shaft (38), and both slits (51, 52) are formed. 9) The sewing machine according to claim 8, characterized in that they are in communication with each other by means of lateral holes (53). The shaft (38.1) has a longitudinal hole (54), which is closed by a lubrication nipple (56) acting as a check valve, and slit (43) by at least one lateral hole (55). The sewing machine according to claim 1, wherein the sewing machine is in communication with the sewing machine. In addition to the radial slit or in place of the radial slit, it is relatively non-rotatable with at least one disk (63) and sleeve (59) which are non-rotatably coupled with the shaft (38.2). At least one other disk (69) to be joined is placed in the radially expanding chamber (60) of the sleeve (59), and at least an axial narrow slit (72) is between these disks (63, 69). Sewing machine according to any one of claims 2 to 10, characterized in that it is formed and the chamber (60) and at least one slit (72) are filled with a viscous substance (24). A plurality of discs (63) on the shaft side separated from each other by a spacer ring (64) are fixed to the shoulder (62) of the shaft (38.2) using screws (65), and similarly A corresponding number of sleeve-side discs (69) separated from each other by a spacer ring (70), said disc (69) engaged between the shaft-side discs (63) being threaded rings ( Sewing machine according to claim 11, characterized in that it is pressed against the wall (61) of the chamber (60) by 71). The capsule is formed as a box (guide 86) to cover the intermittently moving feed base (sliding plate 93) or to dampen the vibration of the feed base, and the inner surface of the box is the feed base (93). Sewing machine according to claim 1, characterized in that a slit (103) is formed with the adjacent surfaces of.

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