JP2009142410A - Feeding regulating mechanism for sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a feeding regulating mechanism for a sewing machine which can prevent noises from being generated by a switching motion in the feeding direction of a sewing object. <P>SOLUTION: The sewing machine M comprises a feeding regulating dial 21, a feeding regulator 22, a feeding amount regulating mechanism 35, and a solenoid 54. In this case, the feeding regulating dial 21 is equipped with a shaft member 21a, and is installed on the machine frame F in a manner to be able to advance/retract. The feeding regulator 22 is equipped with a cam surface 22a for the setting of a normal direction feeding amount, and a cam surface 22b for the setting of a reverse direction feeding amount, and is turnably installed on the machine frame F in such a manner that either one of the cam surfaces 22a and 22b may come into contact with the shaft member 21a. The feeding amount regulating mechanism 35 is operation-connected with the feeding regulator 22, and generates a fabric feeding amount in response to the feeding amount which has been set by the feeding regulating dial 21. The solenoid 54 is operation-connected with the feeding regulator 22, and turns the feeding regulator 22 until one of the cam surfaces 22a and 22b selectively comes into contact with the shaft member 21a of the feeding regulating dial 21. In the sewing machine M, on the feeding regulator 22, a weight body 7 and an elastic member 8 which absorb the vibration when coming into contact with the shaft member 21a of the feeding regulating dial 21 are installed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a feed adjusting mechanism for a sewing machine that adjusts a feed amount and a feed direction of a sewing object.

  Conventionally, industrial sewing machines and household sewing machines have a feed mechanism that drives a feed dog for feeding an object to be sewn, and a feed adjustment mechanism that can switch the feed direction of the feed mechanism between a forward direction and a reverse direction. ing. As a prior art of this feed adjustment mechanism, for example, there is one described in Patent Document 1.

  This prior art feed adjustment mechanism includes a feed adjustment dial provided on a machine frame of a sewing machine, a feed adjuster that adjusts an inclination angle in accordance with an adjustment amount of the feed adjustment dial, and a switch shaft provided on the feed adjuster. A feed amount adjustment mechanism that adjusts the cloth feed amount according to the inclination angle of the feed adjuster, and a feed adjustment that is operatively connected to the feed adjuster and abuts against the shaft member of the feed adjustment dial. And a reverse stitching lever for switching the feed direction by the feed mechanism by switching the contact portion of the tool.

JP 2006-247044 A

  In the conventional feed adjustment mechanism, when the operator operates the reverse stitching lever, the contact portion of the feed adjuster that contacts the shaft member of the adjustment dial is switched. At this time, one of the two contact portions of the feed adjuster that has been in contact so far is separated from the shaft member of the feed adjustment dial, and the other contact portion that has been separated so far is the feed adjustment. It contacts the shaft member of the dial. The feed adjuster receives an impact by such a switching operation involving the separation and the subsequent contact, and generates an impact sound.

  At this time, in the above-described conventional feed adjustment mechanism, in order to prevent the reaction force generated by the feed mechanism or the feed adjustment mechanism from being transmitted to the feed adjuster via the switch shaft, The vibration suppression mechanism which divides in the middle and suppresses a vibration is interposed in the divided part. By adopting such a structure, it can be considered that the impact sound of the feed adjuster generated by the switching operation can also be suppressed.

  However, in this case, since the vibration is suppressed by the vibration suppression mechanism located away from the feed adjuster that is the source of the impact sound, the vibration generated by the feed adjuster is transmitted to the middle of the switch shaft. Therefore, it was not enough as a measure to prevent the impact noise of the feed adjuster.

  An object of the present invention is to provide a feed adjusting mechanism for a sewing machine that can prevent noise from being generated by an operation of switching the feed direction of a sewing object.

  In order to achieve the above object, a feed adjusting mechanism for a sewing machine according to a first aspect of the present invention includes a feed adjusting dial that includes a shaft member and that can be moved forward and backward in a machine frame of the sewing machine, and a first contact for setting a forward feed amount. And a second abutting portion for setting the reverse feed amount, and is rotated to the machine frame so that one of the first abutting portion and the second abutting portion abuts on the shaft member. A feed adjuster provided in a possible manner, a feed amount adjusting mechanism that is operatively connected to the feed adjuster and generates a cloth feed amount according to a feed amount set by the feed adjustment dial, and is operatively connected to the feed adjuster. A sewing machine comprising: a switching drive body that rotates the feed adjuster until one of the first abutment portion and the second abutment portion selectively abuts the shaft member of the feed adjustment dial; Vibration that absorbs vibration when the adjuster contacts the shaft member of the feed adjustment dial. Characterized by providing an absorber.

  In general, in a sewing machine, a feed mechanism feeds a sewing object in a forward direction or a reverse direction, and performs sewing of the sewing object. In the sewing machine feed adjusting mechanism according to the first invention of the present application, when the operator wants to adjust the feed amount of the sewing object, when the operator turns the feed adjusting dial, the shaft member rotates the feed adjuster via the contact portion. Move. The feed amount adjusting mechanism causes the feed mechanism to generate a feed amount corresponding to the set rotation amount in accordance with the rotation amount.

  When the operator wants to switch the feed direction of the sewing object from the normal direction to the reverse direction (or from the reverse direction to the normal direction) during the sewing operation, the operator operates the reverse stitching lever. When the reverse solenoid is attached to the sewing machine, the reverse solenoid is driven. The contact portion of the feed adjuster that contacts the shaft member of the feed adjustment dial is switched by a switching drive body such as a reverse rotation lever or reverse rotation solenoid. The switching of the abutting portion is such that one of the two abutting portions that has been abutting so far is separated from the shaft member of the feed adjusting dial, and the other abutting portion that has been separated so far is fed. It will contact | abut to the shaft member of an adjustment dial. The feed adjuster receives an impact by such a switching operation involving the separation and the subsequent contact, and generates an impact sound. In the first invention of the present application, the vibration absorber provided in the feed adjuster vibrates itself, so that the kinetic energy due to the impact as described above can be absorbed. As a result, the sewing machine feed adjusting mechanism of the first invention of the present application can prevent noise from being generated by the switching operation and can eliminate the operator's discomfort.

  The feed adjustment mechanism for a sewing machine according to a second aspect of the invention is characterized in that, in the first invention, the vibration absorber includes a weight body and an elastic member that connects the weight body to the feed adjuster.

  The weight body elastically connected to the feed adjuster via the elastic member absorbs vibration due to impact while vibrating itself. Thereby, the feed adjusting mechanism of the sewing machine according to the second aspect of the present invention can prevent the generation of noise due to the switching of the contact portion of the feed adjuster.

  According to a third aspect of the present invention, there is provided a feed adjusting mechanism for a sewing machine according to the first invention, wherein the vibration absorber is configured by connecting a weight made of an elastic material to the feed adjuster.

  A weight body made of an elastic material connected to the feed adjuster absorbs vibration due to impact while vibrating itself. Thereby, the feed adjusting mechanism for the sewing machine according to the third aspect of the present invention can prevent the generation of noise due to the switching of the contact portion of the feed adjuster.

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent that noise generate | occur | produces by switching operation | movement of the feed direction of a sewing target object, and can remove an operator's discomfort.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the sewing machine M includes a bed portion 1, a pedestal portion 2 erected on the right side of the bed portion 1, and an upper portion of the pedestal portion 2 to the left so as to face the bed portion 1. It has an arm part 3 that extends and a head part 4 provided on the left part of the arm part 3. The bed portion 1 includes a thread trimming mechanism (not shown), a rotary hook (not shown), and the like, and a bobbin around which a lower thread is wound is detachably mounted on the rotary hook.

  As shown in FIG. 2, the arm portion 3 has an upper shaft 6 that is driven by a sewing motor (not shown), and the head portion 4 is a needle bar drive mechanism 9 that drives the needle bar 5 up and down by the upper shaft 6. Etc.

  Here, the sewing machine M has a feed adjustment mechanism 20 that adjusts the feed amount and feed direction of the cloth that is the sewing object. As shown in FIG. 2, the feed adjusting mechanism 20 includes a shaft member 21 a that is screwed into a screw hole formed in the machine frame F of the pedestal column portion 2 in the front-rear direction. The adjustment dial 21 includes a cam surface 22a (first contact portion) for setting the forward feed amount and a cam surface 22b (second contact portion) for setting the reverse feed amount. The feed adjuster 22 is provided on the machine frame F so as to be rotatable so that any one of the contact members 22 a contacts the shaft member 21 a of the adjustment dial 21.

  The feed adjustment mechanism 20 is operatively connected to the feed adjuster 22 and generates a cloth feed amount corresponding to the feed amount set by the feed adjustment dial 21. A feed direction switching mechanism 50 that switches between the two, and a feed mechanism 10 that is operatively connected to the feed amount adjusting mechanism 35 and the feed direction switching mechanism 50 to drive the feed dog 14 in the front-rear direction (cloth feed direction) and in the vertical direction. Have

  First, the feed mechanism 10 will be described. FIG. 2 is a perspective view showing a schematic configuration of the feed adjusting mechanism 20 from below. As shown in FIG. 2, the bed portion 1 includes a lower shaft 11 facing in the left-right direction that is rotatably supported by the machine frame F. The lower shaft 11 is driven in a predetermined rotational direction when the driving force of the sewing machine motor is transmitted through a timing belt (not shown). Further, the lower shaft 11 has an eccentric shaft 12 fixed to the left end portion, and further, the left end portion of the eccentric shaft 12 is connected to the rear end portion of the feed base 15 via the vertical movement link 13. The feed base 15 removably supports the feed dog 14 on its upper surface. When the lower shaft 11 is rotationally driven by the sewing machine motor, the feed dog 14 swings its front end portion via the eccentric shaft 12 and the vertical movement link 13. Swings up and down as a moving fulcrum.

  On the other hand, in the bed portion 1, a horizontal feed shaft 16 that is rotatably supported by the machine frame F is disposed substantially parallel to the lower shaft 11 on the front side of the lower shaft 11. The horizontal feed shaft 16 has a feed lever 17 fixed to the left end, and the upper end of the feed lever 17 pivotally supports the front end of the feed base 15. When the lower shaft 11 is rotationally driven by the sewing machine motor, the horizontal feed shaft 16 swings through the feed adjusting link body 60 (detailed structure will be described later), and the feed dog 14 moves back and forth.

  With the configuration described above, when the feed dog 14 is driven so as to swing upward when moving backward and then swing downward when moving forward, the feed dog 14 moves backward. Since it protrudes from the needle plate, it is forward feed. On the other hand, when the feed dog 14 is driven so as to swing upward when moving forward and then swing downward when moving backward, the feed dog 14 protrudes from the needle plate while swinging forward. Therefore, reverse feed is performed. Although the details will be described later, the feed direction switching mechanism 50 performs the feed direction switching based on the operator's input.

  Next, the feed adjustment dial 21 and the feed adjuster 22 will be described. As shown in FIG. 2, a shaft member 21 a of the feed adjustment dial 21 is rotatably engaged with a screw hole formed in the machine frame F of the pedestal column portion 2 in the front-rear direction. That is, the feed adjustment dial 21 moves forward and backward (moves back and forth) via the shaft member 21a by a turning operation by the operator. The feed adjuster 22 located on the rear side of the shaft member 21 a has V-shaped feed cam surfaces 22 a and 22 b, and the machine frame F is connected to the feed adjuster 22 via a pivot shaft 23 that is directed to the left and right. It is pivotally supported. The feed adjuster 22 has a weight body 7 having a weight larger than that of the feed adjuster 22 and an elastic member 8 such as a leaf spring for connecting the weight body 7 to the feed adjuster 22 at the rear end. (However, it is not shown in FIG. 2; see FIG. 7 described later).

  The rear end portion of the feed adjuster 22 is connected to the upper end portion of the first connection link 24 substantially in the vertical direction via the pivot pin 51, and the lower end portion of the first connection link 24 is one end of the connection arm 53. Connect to the side. The other end side of the connecting arm 53 is rotatably connected to the front end portion of the plunger 55 of the solenoid 54 (switching drive body).

  Next, the feed adjuster 22 is operatively connected to the feed adjuster 22 via the first connection link 24 and the second connection link 52, and the feed adjuster 22 generates a feed amount by the feed dog 14 according to the rotation angle of the feed adjuster 22. The amount adjusting mechanism 35 will be described.

  As shown in FIG. 2 and FIG. 3, switching as a rotating shaft located on the front side of the lower shaft 11 and connected to the lower end of the first connecting link 24 and one end side of the connecting arm 53 via the second connecting link 52. The operating shaft 61 is fixed to the left end portion of the instrument shaft 59, and the operating lever 61 is connected to the rear end portion of the substantially arc-shaped arc-shaped link 62. The front end portion of the arc-shaped link 62 is connected to the right end portion of the substantially U-shaped posture switching body 64 whose rotation posture can be changed around the shaft 63 positioned behind the horizontal feed shaft 16, and to the posture switching body 64. It connects via the fixed pin 65 provided so that rotation is possible.

  Inside the posture switching body 64, a pair of rotation links 66, 66 are rotatably connected to the posture switching body 64 via a fixed pin 65 on one end side. Further, on the further inner side of the rotation links 66, 66, a pair of output side links 70, 70 are connected to the rotation links 66, 66 on one end side via a moving pin 67 (see FIGS. 3 to 6 described later). In addition to being connected to the end side, the other end side is rotatably connected to a lever 69 fixed to the right end portion of the horizontal feed shaft 16 via a pin 68 (see FIGS. 3 to 6 described later).

  In addition, the rear end side is eccentrically connected to the lower shaft 11, and the front end side of the input side link 71 that moves forward and backward with the rotation of the lower shaft 11 is connected to the moving pin 67 on the inner side of one end side of the output side links 70 and 70. Link. A link body 60 (referred to as a feed adjustment link body 60) composed of the posture switching body 64, the rotation link 66, the input link 71, and the output link 70 is referred to as the movement amount of the output link 70. The movement amount of the output link 70 is changed by changing the posture of the posture switching body 64.

  With such a structure of the feed adjustment link body 60, the switcher shaft 59 is connected via the first and second connection links 24 and 52 based on the rotation angle of the feed adjuster 22 corresponding to the adjustment amount of the feed adjustment dial 21. Is rotated, the attitude switching body 64 changes the rotation attitude via the operating lever 61 and the arc-shaped link 62 according to the rotation amount. As a result, the feed adjusting link body 60 swings the front end portion of the input side link 71 at a ratio corresponding to the rotation angle of the posture switching body 64 via the output side link 70 and the lever 69. Is converted into a circumferential swing. As a result, the feed adjusting link body 60 generates a cloth feed amount corresponding to the turning amount of the switcher shaft 59. In this way, the feed amount adjusting mechanism 35 adjusts the cloth feed amount according to the rotation angle of the feed adjuster 22.

  Next, the feed direction switching mechanism 50 will be described. When the operator operates a feed direction changeover switch (not shown) to set the feed direction to the forward direction, the plunger 55 of the solenoid 54 extends forward as shown in FIGS. As a result, the connecting arm 53 is rotated, and the posture switching body 64 is inclined in the forward direction via the second connecting link 52, the switch shaft 59, the operating lever 61, and the arc-shaped link 62 (in FIGS. 3 and 4). The rotation posture is changed in the direction of arrow A).

  As a result, as shown in FIG. 3, when the input side link 71 moves backward (in the direction of arrow R in the figure), the lever 69 and the horizontal feed shaft 16 are rotated in the clockwise direction (in the direction of arrow X in the figure). The feed dog 14 moves in the forward direction. On the other hand, as shown in FIG. 4, when the input side link 71 moves forward (in the direction of arrow F in the figure), the lever 69 and the horizontal feed shaft 16 are rotated counterclockwise (in the direction of arrow Y in the figure). ) And the feed dog 14 moves backward. The forward / backward movement of the input side link 71 corresponds to the upward / downward movement of the feed dog 14 by the vertical movement link 13. In short, when the vertical movement link 13 moves upward (when the feed dog 14 protrudes from the needle plate), the input side link 71 moves forward as shown in FIG. 4 and moves the feed dog backward. . When the vertical movement link 13 moves downward (when the feed dog 14 sinks from the needle plate), the input side link 71 moves rearward as shown in FIG. 3 and moves the feed dog 14 forward. . With the above operation, forward feeding is performed.

  Further, in the above, when the plunger 55 of the solenoid 54 extends forward and the connecting arm 53 rotates, the first connecting link 24 connected to one end side (rear end side) of the connecting arm 53 is moved downward. Moving. As a result, the feed adjuster 22 rotates about the pivot shaft 23 as a fulcrum, and the cam surface 22a for setting the forward feed amount comes into contact with the shaft member 21a of the adjustment dial 21 (see FIG. 7A described later). ).

  On the other hand, when the operator operates a feed direction changeover switch (not shown) to change the feed direction to the reverse direction, the plunger 55 of the solenoid 54 contracts backward as shown in FIGS. As a result, the connecting arm 53 rotates, and the posture switching body 64 does not tilt backward via the second connecting link 52, the switch shaft 59, the operating lever 61, and the arc-shaped link 62 (FIG. 5, FIG. 5). (6) (the direction of arrow B).

  In other words, the fixed pin 65 as a pivot point of the pivot link 66 is positioned forward of the straight line connecting the movable pin 67 and the pin 68 at both ends of the output link 70 during forward feed. When the plunger 55 of the solenoid 54 is shortened rearward, the position of the fixed pin moves rearward from the straight line connecting the moving pin 67 and the pin 68 at both ends of the output link 70. As a result of this movement, the rotation direction of the lever 69 and the horizontal feed shaft 16 when the input side link 71 moves forward (when the vertical movement link 13 moves upward) is the clockwise direction of FIGS. Switch to.

  As shown in FIG. 5, when the input side link 71 moves rearward (in the direction of the arrow R in the figure), that is, when the vertical movement link 13 moves downward, the lever 69 and the horizontal feed shaft 16 are opposite. It rotates in the clockwise direction (the direction of arrow Y in the figure), and the feed dog 14 moves backward. On the other hand, as shown in FIG. 6, when the input side link 71 swings forward (in the direction of arrow F in the figure), that is, when the vertical movement link 13 moves upward, the lever 69 and the horizontal feed shaft 16 rotates in the clockwise direction (the direction of the arrow X in the figure), and the feed dog 14 moves in the forward direction. Therefore, by the above operation, the feed dog 14 swings upward when moving forward and swings downward when moving backward, so that reverse feed is performed.

  Further, in the above, when the plunger 55 of the solenoid 54 is contracted rearward and the connecting arm 53 is rotated, the first connecting link 24 connected to one end side (rear end side) of the connecting arm 53 is directed upward. Moving. As a result, the feed adjuster 22 rotates about the pivot shaft 23 as a fulcrum, and the cam surface 22b for setting the reverse feed amount comes into contact with the shaft member 21a of the adjustment dial 21 (see FIG. 7B described later). ).

  Next, the weight 7 (vibration absorber) and the elastic member 8 (vibration absorber) such as a leaf spring connecting the weight 7 to the feed adjuster 22 provided at the rear end of the feed adjuster 22 will be described. To do.

  As described above, when the feed direction is the positive direction, the cam surface 22a of the feed adjuster 22 contacts the shaft member 21a of the adjustment dial 21 as shown in FIG. On the other hand, when the feed direction is the reverse direction, the cam surface 22b of the feed adjuster 22 contacts the shaft member 21a of the adjustment dial 21 as shown in FIG. Each time the operator operates a feed direction changeover switch (not shown) to switch the feed direction to the forward direction or the reverse direction, the feed adjuster 22 rotates, and the cam surface that contacts the shaft member 21a of the feed adjustment dial 21 is a cam. The surface is switched to the surface 22a or the cam surface 22b. That is, of the two cam surfaces 22a and 22b, the one cam surface that has been in contact so far is separated from the shaft member 21a of the feed adjustment dial 21, and the other cam surface that has been separated so far is the feed adjustment dial 21. It will contact | abut to the shaft member 21a.

  The feed adjuster 22 receives an impact by such a switching operation involving separation and subsequent contact, and generates an impact sound. When the cam surface of the feed switch 22 collides with the shaft member 21 a of the adjustment dial 21, the weight body 7 provided at the rear end of the feed adjuster 22 vibrates itself via the elastic member 8. The vibration of the weight body 7 absorbs the kinetic energy due to the collision with the shaft member 21a, and prevents the noise of the feed adjuster 22 due to the switching operation.

  Next, the operation and effect of the feed adjustment mechanism 20 configured as described above will be described.

  Generally, in a sewing machine, a feed mechanism feeds a sewing object in the forward direction or the reverse direction, and performs sewing on the sewing object. When the operator wants to adjust the feed amount of the sewing object, when the operator turns the feed adjustment dial 21, the shaft member 21a rotates the feed adjuster 22 via the cam surfaces 22a and 22b. The feed amount adjusting mechanism 35 generates a feed amount corresponding to the set rotation amount in the feed mechanism according to the rotation amount.

  When the operator wants to switch the feed direction of the sewing object from the normal direction to the reverse direction (or from the reverse direction to the normal direction) during the sewing operation, the operator operates the changeover switch. The solenoid 54 is driven. The cam surface of the feed adjuster 22 that contacts the shaft member 21 a of the feed adjustment dial 21 is switched by the solenoid 54. This switching of the cam surface is such that one of the two cam surfaces 22a, 22b that has been in contact with the cam surface is separated from the shaft member 21a of the feed adjustment dial 21, and the other cam surface that has been separated so far is It will contact the shaft member 21a of the feed adjustment dial 21. The feed adjuster 22 receives an impact by such a switching operation involving separation and subsequent contact, and generates an impact sound. In the present embodiment, the weight body 7 provided in the feed adjuster 22 vibrates itself through the elastic member 8 so that the kinetic energy due to the impact as described above can be absorbed. As a result, the feed adjusting mechanism 20 of the sewing machine M according to the present embodiment can prevent noise from being generated by the switching operation and can remove the operator's discomfort.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit and technical idea of the present invention. Hereinafter, such modifications will be described in order.

(1) When the weight body is made of an elastic material In the above embodiment, the vibration absorber is formed by providing the weight body 7 via the elastic member 8 at the rear end of the feed adjuster 22. Not exclusively. For example, as shown in FIG. 8, the weight body itself may be formed of an elastic body such as a vibration-proof rubber, and the weight body 7 </ b> A may be provided in the feed adjuster 22. Alternatively, as shown in FIG. 9, the elastic member and the weight body may be integrally configured such that the elastic member 8A includes the weight body 7 therein.

(2) When applied to a sewing machine having a reverse stitching lever In the above embodiment, the case where the present invention is applied to a sewing machine that uses a solenoid to switch the feed direction has been described as an example. In addition, the present invention may be applied to a sewing machine in which the feed direction is switched by the reverse stitching lever 45. Also in this case, the same effect as the above embodiment can be obtained.

  In addition to those already described above, the methods according to the above-described embodiments and modifications may be used in appropriate combination.

  In addition, although not illustrated one by one, the present invention is implemented with various modifications without departing from the spirit of the present invention.

It is a front view showing the whole structure of a sewing machine which has a feed adjustment mechanism which is one embodiment of the present invention. It is a perspective view showing the whole structure of the feed adjustment mechanism which is one embodiment of the present invention from the lower part. It is a figure showing operation | movement of the feed adjustment link body when a feed direction is a positive direction. It is a figure showing operation | movement of the feed adjustment link body when a feed direction is a positive direction. It is a figure showing operation | movement of the feed adjustment link body in case a feed direction is a reverse direction. It is a figure showing operation | movement of the feed adjustment link body in case a feed direction is a reverse direction. FIG. 7A is a side view conceptually showing the overall configuration of a feed adjuster provided with a weight body and an elastic member. FIG. 7A shows a case where the feed direction is a forward direction and FIG. 7B shows a case where the feed direction is a reverse direction. FIG. It is a figure showing the modification which comprised the weight body with the elastic material. It is a figure showing the modification which comprised the weight body and the elastic material integrally. It is a front view showing the whole structure of a sewing machine which has a reverse stitching lever.

Explanation of symbols

7 Weight body (vibration absorber)
8 Elastic member (vibration absorber)
20 Feed adjustment mechanism 21 Feed adjustment dial 21a Shaft member 22 Feed adjuster 22a Cam surface (first contact portion)
22b Cam surface (second contact part)
35 Feed amount adjustment mechanism 54 Solenoid (switching drive)
59 Switching shaft 60 Feed adjusting link body F Machine frame M Sewing machine

Claims (3)

A feed adjustment dial provided with a shaft member so as to be movable back and forth in the machine frame of the sewing machine;
A first abutting portion for setting a forward feed amount and a second abutting portion for setting a reverse feed amount, and one of the first abutting portion and the second abutting portion is the A feed adjuster provided rotatably on the machine frame so as to contact the shaft member;
A feed amount adjusting mechanism that is operatively connected to the feed adjuster and generates a cloth feed amount according to a feed amount set by the feed adjustment dial;
A switching driver that is operatively connected to the feed adjuster and rotates the feed adjuster until one of the first contact portion and the second contact portion selectively contacts the shaft member of the feed adjustment dial. In a sewing machine having
A sewing machine feed adjusting mechanism, wherein the feed adjuster is provided with a vibration absorber that absorbs vibrations when contacting the shaft member of the feed adjusting dial. The sewing machine feed adjustment mechanism according to claim 1,
The vibration absorber is
A weight,
A sewing machine feed adjustment mechanism comprising: an elastic member that connects the weight body to the feed regulator. The sewing machine feed adjustment mechanism according to claim 1,
The vibration absorber,
A sewing machine feed adjusting mechanism comprising a weight body made of an elastic material and connected to the feed adjuster.

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