JP2005334003A - Feed device of sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a differential feed dog or a main feed dog from interfering with the groove end of a groove for feed dog of a throat plate by individually adjusting a main feed amount and a differential feed amount and changing the main feed amount or the differential feed amount like a conventional feed device in a feed device of a sewing machine provided with the main feed dog and the differential feed dog. <P>SOLUTION: In the feed device of the sewing machine, a main feed longitudinal shaft 14 for longitudinally moving a main feed base 2 and a different feed longitudinal shaft 41 for longitudinally moving a differential feed base 4 are both connected by a link mechanism composed of feed rods 16 and 42 fitted to and supported by the eccentric body 15 of a main shaft 5, arms 17 and 43 fixed to the feed longitudinal shafts 14 and 41 and first links 18 and 44 connecting the feed rods 16 and 42 and the arms 17 and 43, and main feed and differential feed are performed independent of each other. The main feed amount and the differential feed amount are adjusted by turning second links 21 and 46 pivoted to the feed rods 16 and 42 together with the first links 18 and 44. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a feed device for a sewing machine having a main feed dog and a differential feed dog.

  As a feed device for this type of sewing machine, the following Patent Document 1 discloses a main feed shaft that swings in conjunction with the main shaft and moves the main feed dog back and forth, and swings in conjunction with the main feed shaft, thereby providing a differential feed dog. Has a differential feed shaft that moves the main shaft back and forth, and adjusts the amount of main feed shaft oscillation in the transmission mechanism from the main shaft to the main feed shaft, thereby adjusting the feed amount of the main feed dog (hereinafter referred to as the main feed amount). A main feed adjusting mechanism that adjusts the amount of oscillation of the differential feed shaft to the transmission mechanism from the main feed shaft to the differential feed shaft, and thereby the feed amount of the differential feed dog (hereinafter referred to as the differential feed amount). ) Has been disclosed which is provided with a differential feed adjustment mechanism.

  In this feeder, when the main feed amount is changed, the differential feed amount is also changed, and only the main feed amount cannot be changed without changing the differential feed amount. Further, when the main feed amount is increased in a state where the differential ratio, which is the ratio between the differential feed amount and the main feed amount, is set to, for example, 1 or more, that is, the differential feed amount / main feed amount> 1, the differential feed is accompanied accordingly. Since the amount also increases, the differential feed dog may interfere with the groove end of the feed dog groove of the throat plate, so that a predetermined differential ratio cannot be set.

In the feed device disclosed in Patent Document 2 below, the longitudinal feed mechanism of the main feed dog and the longitudinal feed mechanism of the differential feed dog are respectively fitted to the feed shaft, the arm fixed to the feed shaft, and the eccentric body of the rotary shaft. It has a feed rod that is attached and supported, and a link that connects the feed rod and the arm.
JP 2002-239276 A JP-B 56-1118

  In the feed device disclosed in Patent Document 2, the main feed dog longitudinal movement mechanism and the differential feed dog longitudinal movement mechanism each have an eccentric body, and this eccentric body has the main feed dog longitudinal movement mechanism and the differential feed mechanism. Each was provided individually in the tooth back-and-forth movement mechanism.

  Further, in the conventional feeding device described above, the adjustment of the main feed amount and the adjustment of the differential feed amount are performed at different locations.

  SUMMARY OF THE INVENTION The main object of the present invention is to provide a sewing machine feed device in which the eccentric body of the main feed dog's longitudinal movement mechanism and the differential feed dog's longitudinal movement mechanism are made common to simplify the configuration and make the apparatus compact. Another object of the present invention is to provide a sewing machine feed device in which the main feed amount and the differential feed amount are adjusted in one place.

  The invention according to claim 1 includes a main feed base to which the main feed dog is fixed, a differential feed base that is provided in parallel to the main feed base and that has the differential feed dog fixed thereto, and the both feed bases in conjunction with the main shaft. Up and down mechanism to move the main feed table up and down, a main feed table back and forth mechanism to move the main feed table back and forth in conjunction with the main shaft, and a differential feed table to move the differential feed table back and forth in the same manner in conjunction with the main shaft It has a longitudinal motion mechanism, and the longitudinal motion mechanism for the main feed base and the longitudinal motion mechanism for the differential feed base are respectively fitted and supported on the feed shaft, the arm fixed to the feed shaft, and the eccentric portion of the main shaft. A feed rod, a first link connecting the arm and the feed rod, and the main feed base longitudinal movement mechanism and the differential feed base longitudinal movement mechanism are respectively connected to the main feed base and the differential feed base. A sewing machine feed device with a separate feed amount adjustment mechanism for adjusting the amount of forward and backward movement. Wherein the feed rod of the feed rod and the differential feed table forward-rearward movement mechanism Kodo mechanism is fitted to the same eccentric portion of the main shaft together.

  According to a second aspect of the present invention, there is provided a main feed base to which main feed dogs are fixed, a differential feed base that is arranged in parallel on the main feed base and to which differential feed teeth are fixed, and the both feed bases in conjunction with a main shaft. Up and down mechanism to move the main feed table up and down, a main feed table back and forth mechanism to move the main feed table back and forth in conjunction with the main shaft, and a differential feed table to move the differential feed table back and forth in the same manner in conjunction with the main shaft It has a longitudinal motion mechanism, and the longitudinal motion mechanism for the main feed base and the longitudinal motion mechanism for the differential feed base are respectively fitted and supported on the feed shaft, the arm fixed to the feed shaft, and the eccentric portion of the main shaft. A feed rod, a first link connecting the arm and the feed rod, and the main feed base longitudinal movement mechanism and the differential feed base longitudinal movement mechanism are respectively connected to the main feed base and the differential feed base. In a sewing machine feed device that is provided with a feed amount adjustment mechanism for adjusting the amount of longitudinal movement, A feed amount adjusting mechanism for adjusting the back movement amount has a first adjustment shaft, and a feed amount adjustment mechanism for adjusting the back and forth movement amount of the differential feed base has a second adjustment shaft, respectively. The two adjusting shafts have a double shaft structure in which one adjusting shaft forms a cylindrical shape and is inserted into the other adjusting shaft. Manual adjusting means is connected to each adjusting shaft. The first or second adjustment shaft is rotated by adjusting the amount of longitudinal movement of the main feed base or the differential feed base.

  Here, as a manual operation means, a dial, a lever, etc. can be used, for example.

  According to a third aspect of the present invention, in the second aspect of the invention, the other end of the second link having one end pivotally attached to the lever fixed to the first or second adjustment shaft is connected to the arm and the first link. It is characterized by being axially attached by the same axis.

  According to a fourth aspect of the present invention, in the invention according to the third aspect, the differential feed lever of the manual operation means is fixed to the second adjustment shaft, and the differential feed lever is fixed to the first adjustment shaft. It is characterized by being fixed to the main feed lever of the operation means by a first set screw so that the position can be adjusted.

  The invention according to claim 5 is characterized in that, in the invention according to claim 4, the main feed lever is fixed to the sewing machine frame by a second set screw so that the position can be adjusted.

  According to the first aspect of the invention, the main feed amount and the differential feed amount can be individually adjusted, and only the main feed amount can be changed without changing the differential feed amount. By changing the main feed amount or differential feed amount in the set state, the problem that the differential feed dog or the main feed dog interferes with the groove end of the feed dog groove of the needle plate can be solved. The forward / backward movement mechanism and the forward / backward movement mechanism of the differential feed dog are advantageous in that the feed rod is fitted into the same eccentric part and the eccentric part is used in common, making the configuration simple and making the device compact. Play.

  According to the invention of claim 2, since the first and second adjustment shafts have a double-shaft structure, the first and second adjustment shafts are compact, require less installation space, and the feed amount adjustment is integrated in one place. Therefore, the workability of adjusting the main feed amount and the differential feed amount is improved and each feed amount can be easily confirmed.

  According to the invention of claim 3, when the adjustment shaft is rotated by the operation of the manual operation means, the lever integrated with the adjustment shaft is also rotated, and the axis landing point with the second link is displaced. As a result, the swing range of the second link that swings due to the rotation of the eccentric portion of the main shaft changes, and the swing amount of the main feed shaft or differential feed shaft changes due to the change in the swing range of the second link. The main feed amount or differential feed amount changes. Since the feed amount is adjusted by changing the fulcrum position of the link by the link mechanism in this way, it is composed of an arc groove and a slider slidably fitted in the groove, and the position of the slider is adjusted along the arc groove. Compared with the feed amount adjusting device in which the feed amount is adjusted by this, the wear is less and the structure is simple and can be manufactured at low cost.

  According to the fourth aspect of the present invention, both the main feed amount and the differential feed amount can be adjusted by fixing the differential feed lever to the main feed lever with the first set screw.

  According to the invention of claim 5, by fixing the main feed lever to the sewing machine frame with the second set screw, it is possible to reliably adjust only the differential feed amount by operating only the differential feed lever. It becomes like this.

  Hereinafter, a sewing machine feeding device according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of the sewing machine as viewed from the front side, and FIG. 2 is a perspective view of the apparatus as viewed from the rear side.

  A main feed base 2 to which the main feed dog 1 is fixed and a differential feed base 4 to which the differential feed dog 3 is fixed are arranged side by side, and the feed bases 2 and 4 are respectively formed in two sides. . A square piece 6 rotatably supported by an eccentric pin (not shown) at the end of the main shaft 5 is mounted on the rear forks 2a and 4a on the rear side of each feed base 2, 4 so as to be slidable in the front-rear direction. A square piece 11 rotatably supported by a crank pin (not shown) protruding laterally from the arm 8 at the end of the vertical feed shaft 7 is slidable on the front forks 2b and 4b of the feed bases 2 and 4. It is installed.

  The vertical feed shaft 7 described above is connected to a vertical feed rod 12 which is parallel to the main shaft 5 and is supported by an arm 9 fixed to the vertical feed shaft 7 fitted to an eccentric body (not shown) of the main shaft 5. Accordingly, the vertical feed shaft 7 swings in conjunction with the rotation of the main shaft 5. In this way, the square pieces 6 and 11 mounted on the front and rear two branches 2a, 4a and 2b and 4b of the two feed bases 2 and 4 are both rotated by the rotation of the main shaft 5 and the swing of the vertical feed shaft 7 interlocked with the main shaft 5. The feed bases 2 and 4 are moved up and down. The main shaft 5 described above, the vertical feed shaft 7 that swings through the vertical feed rod 12 and the arm 9 by the rotation of the main shaft 5, the two feed bases 2, The square pieces 6, 11 and the like mounted on the front and rear two forks 2a, 4a and 2b, 4b constitute a vertical movement mechanism for the main feed base 2 and the differential feed base 4.

  Next, the longitudinal movement mechanism of the main feed base 2 and the differential feed base 4 will be described.

  The forward / backward movement mechanism of the main feed base 2 has a main feed front / rear shaft 14 parallel to the main shaft 5, and the main shaft 5 and the main feed front / rear shaft 14 are fixed to the main shaft 5 as shown in FIGS. 3 and 4. Are connected by a link mechanism comprising a main feed rod 16 fitted and supported by the eccentric body 15, an arm 17 fixed to the main feed front and rear shaft 14, and a first link 18 that connects the main feed rod 16 and the arm 17. A second link 21 is further pivotally attached to the pin 19 that pivotally attaches the main feed rod 16 and the first link 18, and the lever 23 fixed to the cylindrical first adjustment shaft 22 and the second link 21. The link 21 is pivotally attached by a pin 24.

  As shown in FIGS. 1 and 2, an arm 26 is fixed to the shaft end of the main feed front / rear shaft 14, and the arm 26 is connected to the main feed base 2 via a link 27.

  The forward / backward movement mechanism of the main feed base 2 is configured as described above. When the eccentric body 15 rotates, the arm 17 swings with the main feed front / rear shaft 14 while the second link 21 swings around the pin 24 as a fulcrum. As a result, the arm 26 also swings to move the main feed base 2 back and forth.

  5 and 6 show manual operation means of the first adjustment shaft 22, and the first adjustment shaft 22 that constitutes the main feed amount adjustment mechanism together with the lever 23 and the second link 21 includes a sewing machine. A main feed lever 31 is fixed to a shaft end protruding from the machine frame 29.

  An inner arc groove 35 and an outer arc groove 36 are formed on the display plate 34 fixed to the sewing machine frame 29 with a screw 33 via a collar 32, and are stepped on the end of the main feed lever 31. The screw 37 is slidably guided along the outer arc groove 36 of the display plate 34, and is fixed to the display plate 34 by an adjustment nut 38 as a second set screw. The adjusting nut 38 together with the main feed lever 31 constitutes a manual operating means for the adjusting shaft 22.

  The main feed amount is adjusted by operating the adjustment nut 38 along the outer arc groove 36 in a state where a stepped screw 55 (to be described later) is loosened and the adjustment nut 55a is loosened. That is, when the adjustment nut 38 is moved along the outer arc groove 36, the first adjustment shaft 22 rotates together with the main feed lever 31, and the position of the pin 24 that is the fulcrum of the link 21 causes the first adjustment shaft 22 to be curved. Move on the center arc. As a result, the swing range of the second link 21 that swings due to the rotation of the eccentric body 15 changes, and the swing range of the arm 17 and the main feed front / rear shaft 14 changes due to the change of the swing range of the link 21. The amount of forward / backward movement of the main feed base 2 changes according to the change in the swing range of the main feed front / rear shaft 14.

  The forward / backward movement mechanism of the differential feed base 4 has a differential feed front / rear shaft 41 parallel to the main shaft 5, and the main shaft 5 and the differential feed front / rear shaft 41 include the main shaft 5 as shown in FIGS. 3 and 7. The differential feed rod 42 fitted and supported along with the main feed rod 16 on the eccentric body 15 fixed to the head, the arm 43 fixed to the differential feed front / rear shaft 41, and the differential feed rod 42 and the arm 43 are connected. A second link 46 is further attached to a pin 45 that is connected by a link mechanism including the first link 44 and that attaches the differential feed rod 42 and the first link 44 in an axial manner, thereby forming the above-described cylindrical shape. A lever 48 and a second link 46 fixed to a second adjustment shaft 47, which is rotatably inserted into the first adjustment shaft 22 to form a double shaft structure, are attached by pins 49. The two feed rods 16 and 42 are disposed between the bush 5a supported by the sewing machine frame and the balancer 5b fixed to the main shaft 5, and the washer 5c rotatably supported by the main shaft 5 is disposed on the main feed rod 16. And the bush 5a. Thereby, the cylindrical portions of the feed rods 16 and 42 fitted to the single eccentric body 15 are guided and supported between the washer 5 c and the balancer 5 b in the axial direction of the main shaft 5. Further, by adopting such a configuration, it becomes possible to easily insert and pull out the cylindrical portions of the double feed rods 16 and 42 from the main shaft 5 and to quickly assemble and disassemble the sewing machine. Is not required to have a split structure, and the processing cost is reduced.

  As shown in FIGS. 1 and 2, an arm 51 is fixed to the shaft end of the differential feed front / rear shaft 41, and the arm 51 is connected to the differential feed base 4 via a link 52. Yes.

  The longitudinal movement mechanism of the differential feed base 4 is configured as described above. When the eccentric body 15 rotates, the arm 43 swings with the differential feed shaft 41 while the second link 46 swings around the pin 49 as a fulcrum. As a result, the arm 51 is also swung to move the differential feed base 4 back and forth.

  As shown in FIGS. 5 and 6, the second adjustment shaft 47 constituting the differential feed amount adjustment mechanism together with the lever 48 and the second link 46 has a shaft end protruding from the first adjustment shaft 22. A differential feed lever 54 is fixed to the head.

  A stepped screw 55 is inserted into the end of the differential feed lever 54, and the tip of the stepped screw 55 protruding from the differential feed lever 54 is guided by the arc groove 30 of the main feed lever 31 while being adjusted nuts. The main feed lever 31 and the differential feed lever 54 are fixed when fastened to 55a (first screw) and clamped by the adjusting nut 55a, while the stepped screw 55 is loosened to the main feed lever 31. When the fixing is released, the differential feed lever 54 can be rotated with respect to the main feed lever 31. The adjustment nut 55 a and the differential feed lever 54 constitute manual operation means for the second adjustment shaft 47.

  Adjustment of the differential feed amount is performed by operating the stepped screw 55 along the inner arc groove 35 in a state where the stepped screw 55 is loosened and the fixing to the main feed lever 31 is released. That is, when the stepped screw 55 is moved along the arc groove 35 of the display plate 34 and the arc groove 30 of the main feed lever 31, the second adjustment shaft 47 is rotated together with the differential feed lever 54, and the above-described second adjustment shaft 47 is rotated. A pin 49, which is a swing fulcrum of the link 46, moves on an arc whose center of curvature is the second adjustment shaft 47. As a result, the swing range of the second link 46 that swings due to the rotation of the eccentric body 15 changes, and the swing range of the arm 43 and the differential feed front / rear shaft 41 changes due to the change of the swing range of the link 46. The amount of back-and-forth movement of the differential feed base 4 changes according to the change in the swing range of the differential feed back and forth shaft 41.

  In the state where the adjustment nut 38 and the stepped screw 55 are loosened, as described above, the main feed lever 31 and the differential feed lever 54 can be individually rotated, and the main feed amount and the difference can be determined. Although the dynamic feed amount can be adjusted independently, the differential feed lever 54 is fixed to the main feed lever 31 in a state of being sandwiched between the stepped screw 55 and the adjustment nut 55a, and when the adjustment nut 38 is operated, Both the dynamic feed lever 54 and the main feed lever 31 are rotated, and the main feed amount and the differential feed amount change.

  8 and 9 show another example of the manual operation means. The main feed lever 61 fixed to the cylindrical first adjustment shaft 22 below the bed B and extending sideways has a first inner and outer periphery. The main feed lever 61 extends to the back side of the display plate 66 on which the needle 64 protruding from the lever 61 is fixed to the sewing machine frame 65. The stepped screw 61a fixed to the pointer 64 is fixed to the display plate 66 by screwing of an adjusting nut 68 that is screwed into the stepped screw 61a through an arc groove 67 formed in the display plate 66. The adjustment nut 68 as the second set screw is loosened so that it can rotate together with the first adjustment shaft 22.

  The differential feed lever 69 fixed to the second adjustment shaft 47 inserted into the first adjustment shaft 22 is bent through the arc hole 62, and one side thereof is located on the front side of the main feed lever 61, and the other The stepped screw 69a whose side extends to the back side of the main feed lever 61 and is fastened to the other side is driven by the adjustment nut 71 as a first set screw that is screwed into the differential feed lever 69 through the arc groove 63. While being fixed to the feed lever 61, the differential feed lever 69 can be rotated together with the second adjustment shaft 47 by loosening the adjustment nut 71.

  A stopper 72 projects from the differential feed lever 69 on the opposite side across the second adjustment shaft 47, and a stopper pin 73 that restricts the movable range of the stopper 72 on both sides of the stopper 72 on the sewing machine frame 65. Is arranged. In the figure, F indicates the cloth feeding direction, and the same applies to the following figures.

  In the manual operation means of the above-described embodiment, the adjustment nuts 38, 68, 71 are provided on one side of the first and second adjustment shafts 22, 47 on the side surface of the sewing machine, that is, before the first and second adjustment shafts 22, 47, or Although arranged rearwardly, a part or all of the adjustment nuts 38, 68, 71 may be arranged on the front side of the sewing machine, or the adjustment nuts 38, 68, 71 may be arranged on the first and second adjustment shafts. You may arrange | position on both sides of 22 and 47.

  In the embodiment shown in FIG. 10, the main feed lever 75 and the differential feed lever 76 are both bent at a right angle so that the side of the sewing machine faces the front of the sewing machine and the adjustment nut 77 attached to the front of the main feed lever 75 is screwed in. While the feed lever 75 is fixed to the machine frame, the main feed lever 75 is rotated around the first adjustment shaft 22 by loosening the adjustment nut 77 as the second set screw and moving it along the vertical hole 78. It is supposed to be moved. Further, the differential feed lever 76 is fixed to the main feed lever 75 by screwing an adjustment nut 81 as a first set screw to be screwed into the main feed lever 75 through a vertical hole 79 formed on the front side of the differential feed lever 76. On the other hand, when the adjustment nut 81 is loosened, the differential feed lever 76 can be rotated independently. In the figure, 82 is a scale for displaying the feed amount.

  FIG. 11 shows an example in which a vertical hole displaying a scale is formed in the main feed lever instead of being formed in the differential feed lever. That is, the main feed lever 84 is formed with a vertical hole 86 displaying a scale 85, and the differential feed lever 87 is driven by the adjustment nut 88 as a first set screw to be screwed into the differential feed lever 87. While being fixed to the feed lever 84, the adjustment nut 88 is loosened and moved along the vertical hole 86, so that the differential feed lever 87 can be rotated independently. In the figure, 89 is an adjustment nut as a second set screw for fixing the main feed lever 84 to the sewing machine frame.

  The manual operation means of each of the above embodiments includes the adjustment nuts 38, 68, 77, 89 for operating the main feed levers 31, 61, 75, 84 and the adjustment nut 71 for operating the differential feed levers 54, 69, 76, 87. , 81, 88 are examples in which one side of the sewing machine side surface or the front surface of the sewing machine is provided, but one of the adjustment nut provided on the main feed lever and the adjustment nut provided on the differential feed lever is The side of the sewing machine and the other may be provided on the front side of the sewing machine.

  In FIG. 12, one end of the main feed lever 91 is bent to the front side of the sewing machine, an adjustment nut 92 as a second set screw is attached to the bent portion, and a first set screw attached to the differential feed lever 93 is attached. FIG. 13 shows an example in which the adjusting nut 94 is arranged on the side surface of the sewing machine. FIG. 13 shows an example in which the arc groove 95 shown in FIG. The example which formed this is shown.

  The manual operation means of each of the embodiments described above includes an adjustment nut as a second set screw provided on the main feed lever and an adjustment nut as a first set screw provided on the differential feed lever. 14 shows an example provided on one side of the adjustment shaft. In the example shown in FIG. 14, the adjustment nut 102 for fixing the main feed lever 101 and the adjustment for fixing the differential feed lever 103 to the main feed lever 101 are shown. Nuts 104 are provided on both sides of the adjustment shaft. In the figure, the alternate long and short dash line indicates the axis of the adjustment axis. 10 to 13 similarly, the alternate long and short dash line indicates the axis of the adjustment axis.

The perspective view which looked at the feeder of the sewing machine concerning the present invention from the front. The perspective view which looked at the same feeder from back. The fragmentary sectional front view of the principal part of the feeder. The side view which shows the back-and-forth movement mechanism of a main feed stand. The manual operation means which adjusts a feed amount, and an exploded perspective view of the related member. FIG. The side view which shows the back-and-forth movement mechanism of a differential feed stand. The side view of the manual operation means which adjusts a feed dog. Sectional drawing of the manual operation means shown in FIG. The perspective view which shows another example of a manual operation means. The perspective view which shows another example of a manual operation means. The perspective view which shows another example of a manual operation means. The perspective view which shows another example of a manual operation means. The perspective view which shows the other example of a manual operation means.

Explanation of symbols

1. ・ Main feed dog 2 ・ ・ Main feed stand 3 ・ Differential feed dog 4 ・ ・ Differential feed stand 5 ・ ・ Spindle 6, 11 ・ ・ Square piece 7 ・ ・ Upper and lower feed shafts 8, 9, 17, 26 , 43, 51 ·· Arm 12 · · Vertical feed rod 14 · Main feed front and rear shaft 15 · · Eccentric body 16 · Main feed rods 18 and 44 · · First link 19, 24, 45, 49 · · · 21, 46 ··· Second link 22 · · First adjustment shaft 27 and 52 · · Links 29 and 65 · · Machine frame 31, 61, 75, 84, 91, 101 · · Main feed lever 34 · · Display plate 35 .. Inner arc groove 36 .. Outer arc groove 38, 68, 71, 77, 81, 88, 89, 92, 94, 102, 104.. Adjustment nut 41. Differential feed rod 47 ··· Second adjusting shaft 48 · · Lever 54, 69, 76, 87, 93, 97, 103 · Differential feed lever 62,63,67,95,98 ... arcuate groove 66 ... panel 79,86 ... vertical hole

Claims (5)

  A main feed base to which the main feed dog is fixed, a differential feed base that is arranged in parallel to the main feed base and to which the differential feed dog is fixed, and a vertical movement mechanism that moves both the feed bases up and down in conjunction with the main shaft. And a main feed base longitudinal movement mechanism that moves the main feed base back and forth in conjunction with the main shaft, and a differential feed base longitudinal movement mechanism that also moves the differential feed base back and forth in conjunction with the main shaft, The feed table longitudinal motion mechanism and the differential feed platform longitudinal motion mechanism are respectively a feed shaft, an arm fixed to the feed shaft, a feed rod fitted and supported on an eccentric portion of the main shaft, and the arm. A feed having a first link for connecting the feed rods, and the main feed base longitudinal movement mechanism and the differential feed base longitudinal movement mechanism adjusting the longitudinal movement amount of the main feed base and the differential feed base, respectively. In a sewing machine feed device with a separate amount adjustment mechanism, the feed rod of the main feed base forward / backward movement mechanism Sewing machine feed device characterized by feeding the rod of the differential feed base for longitudinal movement mechanism is fitted to the same eccentric portion of the main shaft together.   A main feed base to which the main feed dog is fixed, a differential feed base that is arranged in parallel to the main feed base and to which the differential feed dog is fixed, and a vertical movement mechanism that moves both the feed bases up and down in conjunction with the main shaft. And a main feed base longitudinal movement mechanism that moves the main feed base back and forth in conjunction with the main shaft, and a differential feed base longitudinal movement mechanism that also moves the differential feed base back and forth in conjunction with the main shaft, The feed table longitudinal motion mechanism and the differential feed platform longitudinal motion mechanism are respectively a feed shaft, an arm fixed to the feed shaft, a feed rod fitted and supported on an eccentric portion of the main shaft, and the arm. A feed having a first link for connecting the feed rods, and the main feed base longitudinal movement mechanism and the differential feed base longitudinal movement mechanism adjusting the longitudinal movement amount of the main feed base and the differential feed base, respectively. To adjust the amount of forward and backward movement of the main feed base in a sewing machine with a separate adjustment mechanism The feed amount adjustment mechanism has a first adjustment shaft, and the feed amount adjustment mechanism for adjusting the amount of forward / backward movement of the differential feed base has a second adjustment shaft, and the first and second adjustment shafts are The adjusting shaft has a cylindrical shape and is inserted into the other adjusting shaft to form a double shaft structure. Each adjusting shaft is connected to manual operating means, and the first or second operating means is operated by operating the manual operating means. A sewing machine feed device characterized by rotating an adjustment shaft to adjust the amount of longitudinal movement of a main feed stand or a differential feed stand.   The other end of the second link having one end pivotally attached to a lever fixed to the first or second adjustment shaft is coaxially attached to the arm and the first link. Sewing machine feeder.   The differential feed lever of the manual operation means is fixed to the second adjustment shaft, and the position of the differential feed lever can be adjusted to the main feed lever of the manual operation means fixed to the first adjustment shaft by the first set screw. The sewing machine feeder according to claim 2, wherein the sewing machine feeder is fixed to the sewing machine.   5. The sewing machine feeding apparatus according to claim 4, wherein the main feed lever is fixed to the sewing machine frame by a second set screw so that the position thereof can be adjusted.

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