JP6371887B2 - Feeding mechanism of feeding arm type sewing machine - Google Patents

Description

The present invention relates to a feeding arm type sewing machine that is easy to sew round and tubular items, and particularly to a feeding arm type sewing machine that is most suitable for feeding the fabric in the fabric feeding direction when sewing the two left and right fabrics together. It relates to the feed mechanism.
In the present invention, the dough feeding direction refers to the direction in which the cylinder extends from the bottom of the bed.
In the present invention, front and rear refer to the front and rear direction in the cloth feeding direction, and left and right refer to the left and right direction when the sewing machine is viewed from the front (the bed side before the cloth feeding direction). Also, “up and down” refers to the up and down direction of the sewing machine.

  Conventionally, as a feeding mechanism of this type of feeding arm type sewing machine, a feed dog interlocking lever (feeding base) is arranged inside the cylinder along the longitudinal direction of the cylinder extending horizontally in the lower part of the sewing machine, and the cloth is extended in the cylinder extending direction There is known a feeding mechanism of a feeding arm type sewing machine that transports along a belt (see Patent Document 1). The feed dog interlocking lever of the feed arm type sewing machine is composed of a front feed dog interlocking lever (main feed base) and a rear feed dog interlocking lever (differential feed base). Side by side. A front feed dog (main feed dog) and a back feed dog (differential feed dog) are respectively attached to the front ends of the front feed dog interlocking lever and the rear feed dog interlocking lever. The front feed dog and the rear feed dog are arranged one behind the other so that the front feed dog is positioned behind the rear feed dog.

Utility Model Registration No. 3151578 (Page 6-8, Figure 1-5)

  This type of feeding arm type sewing machine is for, for example, performing stitching of the crotch of briefs and shorts. Specifically, the left and right fabrics placed on the cylinder are set to a predetermined width from their respective edges. It sews over and over. The two left and right fabrics to be sewn are arranged side by side on the feed dog and conveyed in the fabric feed direction. However, in the conventional feed arm type sewing machine, the left and right fabrics to be sewn are different when the thickness and material are different. The amount of feed differs depending on the fabric, and when the curved portion is sewn, different amounts of feed are required for the left and right fabrics. Therefore, when the above-described sewing is performed in the conventional delivery arm type sewing machine, there is a problem that the sewing product is sewn in an undesired manner such as a shrinkage of the sewing product.

  Therefore, the present invention has been made to solve the above-described problems. Even when the thickness and material of the two right and left fabrics to be sewn are different or when a curved portion is sewn, the sewing finish desired by the operator can be obtained. An object of the present invention is to provide a feeding mechanism of a feeding arm type sewing machine capable of appropriately feeding two right and left fabrics.

The feeding mechanism of the feeding arm type sewing machine of the present invention will be described with reference to the reference numerals attached to FIGS. 1 to 4 in order to facilitate understanding of the contents of the invention, as described in claim 1.
Cylinders 1, 101 extending from the lower part of the bed 2, 102 to be erected in the dough feeding direction F;
Arms 3 and 103 extending from the end of the bed 2 and 102 in a direction crossing the dough feeding direction F;
A delivery arm type sewing machine that conveys in the fabric feed direction F fabrics placed side by side on the cylinder 1,101 by feed teeth that move elliptically in a vertical plane along the fabric feed direction F in conjunction with the main shaft. In the feed mechanism 6,106,
A main feed base 14, a first differential feed base 15 and a second differential feed base 16 arranged side by side in the cylinder 1, 101 along the extending direction of the cylinders 1, 101;
A main feed dog 19 that is attached to the tip of the main feed base 14 and conveys the fabrics arranged on the left and right in the fabric feed direction F;
1st difference which is located in the cloth feed direction F near side with respect to the said main feed dog 19, is attached to the front-end | tip of the said 1st differential feed stand 15, and conveys one of the cloth arranged in the right and left in the cloth feed direction F. A moving feed dog 20;
Positioned on the front side of the material feed direction F with respect to the main feed dog 19 and adjacent to the first differential feed dog 20 in a direction crossing the material feed direction F, the tip of the second differential feed base 16 A second differential feed dog 21 that conveys the other of the doughs arranged on the left and right in the dough feeding direction F;
A first differential feed amount adjustment that changes and adjusts the amount of movement of the first differential feed dog 20 and the first differential feed base 15 in the front-rear direction per one rotation of the main shaft (hereinafter referred to as a first differential feed amount). Mechanism 61;
Second differential feed amount adjustment for changing and adjusting the amount of movement of the second differential feed dog 21 and the second differential feed base 16 in the front-rear direction per one rotation of the main shaft (hereinafter referred to as second differential feed amount) A mechanism 71 is provided.
According to this, when the two right and left fabrics having different thicknesses and materials are sewed together or when the curved portion is sewed, the first differential feed amount adjusting mechanism 61 and the second differential feed amount adjusting mechanism 71 are provided. The first differential feed amount and the second differential feed amount can be individually adjusted, and a desired stitching can be performed.

The feeding mechanism of the feeding arm type sewing machine according to claim 1, as described in claim 2,
The first differential feed amount adjusting mechanism 61 includes a first operation member for adjusting a first differential feed amount provided outside the sewing machine,
The second differential feed amount adjusting mechanism 71 may include a second operation member for adjusting the second differential feed amount provided outside the sewing machine.
According to this, since the first operating member and the second operating member are provided outside the sewing machine, the first differential feed amount and the second differential feed amount can be adjusted very easily.

The feeding mechanism of the feeding arm type sewing machine according to claim 2, as described in claim 3,
The first differential feed dog 20 and the second differential feed dog 21 are located on the left side of the second differential feed dog 21 with respect to the material feed direction F. Are arranged on the left and right
The first operating member is disposed on the left side surface of the bed 2,102,
The second operating member may be arranged on the right side surface of the beds 2 and 102.
According to this, if it is desired to change and adjust the first differential feed amount by the first differential feed teeth 20 arranged on the left side with respect to the fabric feed direction F, the first arranged on the left side surface of the bed 2, 102. An operation member that changes and adjusts the differential feed dog corresponding to the differential feed amount on the differential feed amount side that is desired to be adjusted is arranged on the bed so that the operation member may be operated. Therefore, even if the first operation member and the second operation member are arranged on the side surfaces of the beds 2 and 102, the operator does not hesitate which operation member to operate, and the desired differential feed amount can be set. Change can be adjusted.

The feeding mechanism of the delivery arm type sewing machine according to claim 3, as described in claim 4,
The feed mechanisms 6 and 106 have an amount of movement of the main feed dog 19 and the main feed base 14 in the front-rear direction per one rotation of the main shaft (hereinafter referred to as main feed amount), a first differential feed amount and a second feed rate. A main differential feed amount adjusting mechanism 81 that collectively changes and adjusts the differential feed amount;
The main differential feed amount adjusting mechanism 81 includes a third operation member that is provided outside the sewing machine and collectively adjusts the main feed amount, the first differential feed amount, and the second differential feed amount. Can be adopted.
According to this, the main feed amount, the first differential feed amount, and the second differential feed amount can be collectively changed and adjusted by operating the third operation member provided outside the sewing machine.

  According to the feeding mechanism of the feeding arm type sewing machine of the present invention, when the thickness and the material are different between the two right and left fabrics to be sewn or when the curved portion is sewn, the feeding amount of the fabric is different for each of the left and right fabrics. Since it can be easily changed and adjusted, the two right and left fabrics can be fed so as to achieve the stitching desired by the operator.

It is a schematic perspective view which shows the external appearance of the feed mechanism in the delivery arm type sewing machine of one Example of this invention. It is a perspective view which shows the external appearance of the feed mechanism in the delivery arm type sewing machine of FIG. It is a disassembled perspective view which shows the external appearance of the feed mechanism in the delivery arm type sewing machine of FIG. It is a schematic perspective view which shows the external appearance of the feed mechanism in the delivery arm type sewing machine of another Example of this invention.

  A preferred first embodiment of a delivery arm type sewing machine according to the present invention will be described below with reference to FIGS.

  As shown in FIG. 1, the delivery arm type sewing machine according to the first embodiment has a cylinder 1, a bed 2 and an arm 3. The cylinder 1 extends in the horizontal direction from the lower part of the bed 2 that is erected. The direction in which the cylinder 1 extends from the lower part of the bed 2 is defined as a fabric feed direction F. The bed 2 extends upward and toward the fabric feeding direction F, and the operator performs the sewing operation while visually observing the cylinder 1 from the bed 2 side during the sewing operation. As shown in FIG. 1, a step 2a is provided. At the end of the bed 2 extending in the fabric feed direction F, the arm 3 extends in a direction crossing the fabric feed direction F, and the tip of the arm 3 is located above the tip of the cylinder 1.

  A feeding mechanism 6 is disposed in the lower part of the bed 2 and the cylinder 1. A main shaft (not shown) is disposed inside the arm 3 so as to be rotatable about the axis, and the feed mechanism 6 is driven by the rotation of the main shaft. The feed mechanism 6 has a transmission shaft 7 that is disposed in the lower part of the bed 2 and extends horizontally in the left-right direction. The transmission shaft 7 is rotatably supported by the bed 2 and rotates about the axis in conjunction with the rotation of the main shaft. As shown in FIGS. 1 to 3, an eccentric portion 8 is fixed to the transmission shaft 7, and one end of a vertical rod 9 and a front and rear rod 10 are connected to the eccentric portion 8.

  One end of a pin 13 is rotatably inserted into the other end of the vertical rod 9. The other end of the pin 13 is fitted and fixed in a pin hole 14ab of a block piece 14a formed at the base end of the main feed base 14. A pin 22 is inserted into the pin hole 14ac of the block piece 14a, and the pin 22 is fixed to the pin hole 14ac so that both ends thereof protrude from both ends of the pin hole 14ac. A bifurcated bifurcated piece 15 a formed at the base end of the first differential feed base 15 is slidably fitted to one end of the pin 22. A bifurcated bifurcated piece 16 a formed at the base end of the second differential feed base 16 is slidably fitted to the other end of the pin 22.

  The main feed base 14, the first differential feed base 15 and the second differential feed base 16 are arranged side by side in the cylinder 1 along the extending direction of the cylinder 1. A first differential feed base 15 is disposed on the left side and a second differential feed base 16 is disposed on the right side with the main feed base 14 interposed therebetween. The main feed base 14, the first differential feed base 15 and the second differential feed base 16 are formed with lateral holes 14b, 15b and 16b, respectively. The square piece 17 is inserted through the horizontal holes 14 b, 15 b and 16 b, and the horizontal holes 14 b, 15 b and 16 b are slidable forward and backward with respect to the square piece 17. A pivot pin 18 is fitted to the square piece 17 so as to be rotatable about its axis. The pivot pin 18 is disposed horizontally and perpendicularly to the extending direction of the cylinder 1, and both ends of the pivot pin 18 are installed on the cylinder 1.

  A main feed dog 19 is attached to the tip of the main feed base 14 so that the vertical position can be adjusted. A first differential feed dog 20 is attached to the tip of the first differential feed base 15 so that the vertical position can be adjusted. The first differential feed dog 20 is located on the front side of the material feed direction F with respect to the main feed dog 19. A second differential feed dog 21 is attached to the tip of the second differential feed base 16 so that the vertical position can be adjusted. The second differential feed dog 21 is located on the front side of the fabric feed direction F with respect to the main feed dog 19 and is adjacent to the first differential feed dog 20 in a direction intersecting with the fabric feed direction F. The first differential feed dog 20 and the second differential feed dog 21 are arranged so that the first differential feed dog 20 is positioned on the left side of the second differential feed dog 21 with respect to the material feed direction F. Left and right are arranged. By adjusting the mounting position of the first differential feed dog 20 in the vertical direction separately, the amount of feed of the fabric with respect to the left and right fabrics can be adjusted individually.

  A connecting portion of the crank 25 is connected to the other end of the front / rear rod 10, and a base portion of the crank 25 is fixed to the interlocking shaft 26. The interlocking shaft 26 extending horizontally is supported on the bed 2 so as to freely rotate, and swings around the shaft in conjunction with the rotation of the transmission shaft 7. In addition to the crank 25, the base of an adjustment crank 27 is fixed to the interlocking shaft 26. The adjustment crank 27 has an arcuate arm portion 27a extending rearward from the base portion. A slider 28 is inserted into the arm 27a, and the slider 28 is slidable on the arm 27a. One end of a link 29 and a link 30 is connected to the left and right ends of the slider 28. The other end of the link 29 is connected to a connecting portion of the crank 31 via a screw 33 and a collar 34. The base of the crank 31 is fixed in the middle of the swing shaft 32. A swing shaft 32 extending horizontally from side to side is pivotally supported by the bed 2 and swings about the axis in conjunction with the swing of the interlocking shaft 26. A base portion of the crank 35 is fixed in the middle of the swing shaft 32. The connecting portion of the crank 35 is connected to one end of the link 36 via a screw 37 and a collar 38. The other end of the link 36 is connected to the middle of the main feed base 14 via a screw 39 and a collar 40.

  A base portion of the first differential adjustment crank 45 is fixed to the left end of the swing shaft 32. The first differential adjustment crank 45 has an arcuate arm portion 45a extending upward from the base portion. The arm portion 45a has a U-shaped adjustment groove 45b opened on the right side. A square piece 46 is inserted into the adjustment groove 45 b, and the square piece 46 is connected to one end of a link 47 via a pin 50. The square piece 46 can slide in the adjustment groove 45b. The other end of the link 47 is connected to the middle of the first differential feed base 15 via a screw 48 and a collar 49.

  A base portion of the second differential adjustment crank 55 is fixed to the right end of the swing shaft 32. The second differential adjustment crank 55 has an arcuate arm portion 55a extending upward from the base portion. The arm portion 55a has a U-shaped adjustment groove 55b opened on the left side. A square piece 56 is inserted into the adjustment groove 55 b, and the square piece 56 is connected to one end of a link 57 via a pin 60. The square piece 56 is slidable in the adjustment groove 55b. The other end of the link 57 is connected to the middle of the second differential feed base 16 via a screw 58 and a collar 59.

  The main feed dog 19, the first differential feed dog 20 and the second differential feed dog 21 drive the main feed base 14, the first differential feed base 15 and the second differential feed base 16 by the feed mechanism 6 (vertical movement). And elliptical motion in the vertical plane along the fabric feed direction F) by combining with the back and forth motion), the main feed dog 19, the first differential feed dog 20 and the first feed dog 19 2 When the differential feed dog 21 protrudes from the upper surface of the needle plate, the fabric placed on the cylinder 1 is conveyed along the fabric feed direction F.

  The driving of the main feed base 14, the first differential feed base 15, and the second differential feed base 16 will be specifically described. When the transmission shaft 7 rotates about the axis in conjunction with the rotation of the main shaft, the main feed base 14, the first differential feed base 15 and the second differential feed base 16 are provided via the vertical rod 9, the pin 13 and the pin 22. Swings around the pivot pin 18 as a fulcrum. The main feed dog 19, the first differential feed dog 20 and the second differential feed dog 21 attached to the tips of the main feed table 14, the first differential feed table 15 and the second differential feed table 16 move up and down. Will do. When the transmission shaft 7 rotates about the axis in conjunction with the rotation of the main shaft, the interlocking shaft 26 swings about the axis via the front / rear rod 10 and the crank 25. When the adjusting crank 27 swings around the axis of the interlocking shaft 26 by the swinging of the interlocking shaft 26, the swinging of the adjusting crank 27 is transmitted to the swinging shaft 32 via the slider 28, the link 29 and the crank 31, and swings. The shaft 32 swings around the shaft. The main feed base 14 moves back and forth through the crank 35 and the link 36 by the swing of the swing shaft 32. In addition, the first differential adjustment crank 45 swings around the axis of the swing shaft 32 by the swing of the swing shaft 32, so that the first differential adjustment crank 45 swings with the square piece 46, the pin 50 and It is transmitted to the first differential feed base 15 via the link 47, and the first differential feed base 15 moves back and forth. Further, as the second differential adjustment crank 55 swings around the axis of the swing shaft 32 by swinging of the swing shaft 32, the second differential adjustment crank 55 swings by the square piece 56, the pin 60 and This is transmitted to the second differential feed base 16 via the link 57, and the second differential feed base 16 moves back and forth. That is, when the swing shaft 32 swings in conjunction with the rotation of the main shaft, the main feed teeth 19 attached to the tips of the main feed base 14, the first differential feed base 15 and the second differential feed base 16, The first differential feed dog 20 and the second differential feed dog 21 will move back and forth.

  Next, the first differential feed amount adjusting mechanism 61 that changes and adjusts the first differential feed amount will be described. The first differential feed amount adjustment mechanism 61 has a first differential adjustment lever 62 and a first differential scale plate 63 outside the bed 2. The first differential adjustment lever 62 and the first differential scale plate 63 are disposed on the left side of the lower portion of the bed 2. The first differential scale plate 63 has a scale 63a corresponding to the first differential feed amount at the rear edge thereof. The first differential adjustment lever 62 is disposed so that the tip thereof extends rearward from the base end toward the scale 63 a of the first differential scale plate 63. The base end of the first differential adjustment lever 62 is fixed to one end of the crank 64. The other end of the crank 64 is connected to one end of the lever 65 inside the bed 2. A swing shaft 32 is inserted through the base of the lever 65. The lever 65 is rotatable around the swing shaft 32 with respect to the swing shaft 32. One end of a link 66 is connected to the other end of the lever 65, and the other end of the link 66 is connected to one end of the link 47.

  Here, the change adjustment of the first differential feed amount will be described. When the first differential adjustment lever 62 is rotated up and down along the first differential scale plate 63, the lever 65 can be swung around the swing shaft 32 via the crank 64. As a result, the position of the square piece 46 in the adjustment groove 45 b of the first differential adjustment crank 45 is changed via the link 66 and the link 47. Then, by changing the distance between the swing shaft 32 and the square piece 46, the swing amount of the link 47 connected to the square piece 46 via the pin 50 is changed. As the first differential adjustment lever 62 is rotated upward, the square piece 46 slides to the lower end side of the adjustment groove 45b, the swing amount of the link 47 is reduced, and the first differential feed amount is reduced. Further, as the first differential adjustment lever 62 is rotated downward, the square piece 46 slides to the upper end side of the adjustment groove 45b, the swing amount of the link 47 increases, and the first differential feed amount increases. Become. As described above, the first differential feed amount is changed by the turning operation of the first differential adjustment lever 62, but the main feed amount and the second differential feed amount are not affected.

  Next, the second differential feed amount adjusting mechanism 71 that changes and adjusts the second differential feed amount will be described. The second differential feed amount adjustment mechanism 71 has a second differential adjustment lever 72 and a second differential scale plate 73 outside the bed 2. The second differential adjustment lever 72 and the second differential scale plate 73 are disposed on the right side surface of the lower portion of the bed 2. On the second differential scale plate 73, a scale 73a corresponding to the magnitude of the second differential feed amount is added at the rear edge. The second differential adjustment lever 72 is arranged such that the tip thereof extends rearward from the base end toward the scale 73 a of the second differential scale plate 73. The base end of the second differential adjustment lever 72 is fixed to one end of the crank 74. The other end of the crank 74 is connected to one end of a lever 75 inside the bed 2. A swing shaft 32 is inserted through the base of the lever 75. The lever 75 is rotatable with respect to the swing shaft 32 around the swing shaft 32. One end of a link 76 is connected to the other end of the lever 75, and the other end of the link 76 is connected to one end of the link 57.

  Here, the change adjustment of the second differential feed amount will be described. When the second differential adjustment lever 72 is rotated up and down along the second differential scale plate 73, the lever 75 can be swung around the swing shaft 32 via the crank 74. As a result, the position of the square piece 56 in the adjustment groove 55 b of the second differential adjustment crank 55 is changed via the link 76 and the link 57. Then, by changing the distance between the swing shaft 32 and the square piece 56, the swing amount of the link 57 connected to the square piece 56 via the pin 60 is changed. As the second differential adjustment lever 72 is turned upward, the square piece 56 slides to the lower end side of the adjustment groove 55b, the swing amount of the link 57 is reduced, and the second differential feed amount is reduced. Further, as the second differential adjustment lever 72 is rotated downward, the square piece 56 slides to the upper end side of the adjustment groove 55b, the swing amount of the link 57 increases, and the second differential feed amount increases. Become. As described above, the second differential feed amount is changed by the turning operation of the second differential adjustment lever 72, but the main feed amount and the first differential feed amount are not affected.

  According to the above configuration, the first differential adjustment lever 62 or the second differential adjustment lever 72 can be individually rotated when sewing the two right and left fabrics having different thicknesses and materials or when sewing the curved portion. By performing the operation, the first differential feed amount and the second differential feed amount can be adjusted separately, and the desired stitching can be performed. Further, since the first differential adjustment lever 62 and the second differential adjustment lever 72 are provided outside the bed 2, the first differential feed amount and the second differential feed amount should be adjusted very easily. Can do.

  Next, the main differential feed amount adjusting mechanism 81 that collectively changes and adjusts the main feed amount, the first differential feed amount, and the second differential feed amount will be described. The main differential feed amount adjustment mechanism 81 has a main differential adjustment lever 82 and a main differential scale plate 83 outside the bed 2. The main differential adjustment lever 82 and the main differential scale plate 83 are disposed on the left side of the lower portion of the bed 2. The main differential scale plate 83 is located behind the first differential scale plate 63. On the main differential scale plate 83, a scale 83a corresponding to the magnitudes of the main feed amount, the first differential feed amount, and the second differential feed amount is added to the rear edge. The main differential adjustment lever 82 is disposed so that the tip thereof extends rearward from the base end toward the scale 83 a of the main differential scale plate 83. The base end of the main differential adjustment lever 82 is fixed to one end of the crank 84. The other end of the crank 84 is connected to one end of the lever 85 inside the bed 2. A pivot shaft 86 is inserted through the base of the lever 85, and the lever 85 is fixed to the pivot shaft 86. The rotation shaft 86 extends horizontally from side to side and is rotatably supported on the bed 2. The other end of the link 30 is connected to the other end of the lever 85.

  Here, the batch change adjustment of the main feed amount, the first differential feed amount, and the second differential feed amount will be described. When the main differential adjustment lever 82 is rotated up and down along the main differential scale plate 83, the lever 85 and the rotation shaft 86 are swung around the rotation shaft 86 via the crank 84. Can do. Accordingly, the position of the slider 28 in the arm portion 27 a of the adjustment crank 27 is changed via the link 30. When the distance between the interlocking shaft 26 and the slider 28 is changed, the swing amount of the swing shaft 32 connected via the link 29 and the crank 31 is changed. Accordingly, the swing amount of the link 36 via the crank 35 and the swing amount of the link 47 via the first differential adjustment crank 45 and the square piece 46 are changed via the second differential adjustment crank 55 and the square piece 56. The swing amount of the link 57 is changed. As the main differential adjustment lever 82 is rotated upward, the slider 28 slides to the front end side of the arm portion 27a, the swing amount of the swing shaft 32 decreases, and the swing amount of each link 36, 47, 57 is reduced. The main feed amount, the first differential feed amount, and the second differential feed amount are collectively reduced. Further, as the main differential adjustment lever 82 is rotated downward, the slider 28 slides to the rear end side of the arm portion 27a, and the swing amount of the swing shaft 32 increases, and the links 36, 47, 57 are increased. And the main feed amount, the first differential feed amount, and the second differential feed amount are collectively increased. As described above, the amount of movement of the main feed base 14, the first differential feed base 15, and the second differential feed base 16 in the front-rear direction is collectively changed by the rotation operation of the main differential adjustment lever 82. With the above configuration, the main feed amount, the first differential feed amount, and the second differential feed amount can be easily and collectively controlled by rotating the main differential adjustment lever 82 provided outside the bed 2 of the sewing machine. Change can be adjusted.

  The feeding mechanism of the present invention is not limited to the first embodiment described above, and can be implemented in a feeding arm type sewing machine as shown in FIG. 4 (hereinafter referred to as a second embodiment). In the second embodiment shown in FIG. 4, only the configuration different from the first embodiment will be described, and the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment. As shown in FIG. 4, the delivery arm type sewing machine according to the second embodiment has a cylinder 101, a bed 102, and an arm 103. The cylinder 101 extends in the fabric feed direction F from the lower part of the bed 102. The bed 102 is erected from the base end of the cylinder 101. The arm 103 extends from the end of the bed 102 in a direction intersecting the dough feeding direction, the middle of the arm 103 is bent, and its tip is located above the cylinder 101. A horizontally extending main shaft 107 is rotatably supported on the arm 103. An eccentric portion 108 is fixed to the main shaft 107, and one end of an up / down rod 109 and a front / rear rod 110 of the feed mechanism 106 are connected to the eccentric portion 108. The other end of the vertical rod 109 is connected via a pin 13 to a block piece 14 a formed at the base end of the main feed base 14. A connecting portion of the crank 25 is connected to the other end of the front / rear rod 110. As described above, as in the second embodiment, the feeding mechanism of the present invention can also be implemented for a delivery arm type sewing machine of a different type from the first embodiment. The second embodiment is the same as the first embodiment. Actions and effects can be obtained.

  The present invention is not limited to the embodiments described above, and those skilled in the art can implement the present invention by adding various modifications without departing from the spirit of the present invention. The invention includes those modifications.

DESCRIPTION OF SYMBOLS 1 Cylinder 2 Bed 3 Arm 9 Vertical rod 10 Front / rear rod 14 Main feed base 15 First differential feed base 16 Second differential feed base 19 Main feed dog 20 First differential feed dog 21 Second differential feed dog 26 Interlocking shaft 27 Adjustment crank 32 Oscillating shaft 45 First differential adjustment crank 55 Second differential adjustment crank 61 First differential feed amount adjustment mechanism 62 First differential adjustment lever (first operation member)
71 Second differential feed amount adjustment mechanism 72 Second differential adjustment lever (second operation member)
81 Main differential feed amount adjustment mechanism 82 Main differential adjustment lever (third operation member)

Claims (4)

A cylinder extending from the lower part of the bed to be erected in the dough feeding direction;
An arm extending from the end of the bed in a direction crossing the dough feeding direction;
In the feed mechanism of the delivery arm type sewing machine that conveys the fabric placed side by side on the cylinder in the fabric feed direction by a feed dog that moves elliptically in the vertical plane along the fabric feed direction in conjunction with the main shaft,
A main feed base, a first differential feed base and a second differential feed base arranged side by side in the cylinder along the extending direction of the cylinder;
A main feed dog that is attached to the tip of the main feed base and conveys the fabrics arranged side by side in the fabric feed direction;
A first differential feed dog that is located on the front side in the fabric feed direction with respect to the main feed dog, is attached to the tip of the first differential feed base, and conveys one of the fabrics arranged in the left and right directions in the fabric feed direction; ,
Located on the near side of the material feed direction with respect to the main feed dog and adjacent to the first differential feed dog in a direction intersecting with the material feed direction, attached to the tip of the second differential feed base, A second differential feed dog that conveys the other of the fabrics arranged in the fabric in the fabric feed direction;
A first differential feed amount adjustment that changes and adjusts the amount of movement of the first differential feed dog and the first differential feed base in the front-rear direction per one rotation of the main shaft (hereinafter referred to as a first differential feed amount). Mechanism,
Second differential feed amount adjustment for changing and adjusting the amount of movement of the second differential feed dog and the second differential feed base in the front-rear direction per one rotation of the main shaft (hereinafter referred to as second differential feed amount) A feed arm sewing mechanism characterized by comprising a mechanism. The first differential feed amount adjusting mechanism includes a first operation member for adjusting a first differential feed amount provided outside the sewing machine,
2. The feeding arm type sewing machine according to claim 1, wherein the second differential feed amount adjusting mechanism includes a second operating member for adjusting a second differential feed amount provided outside the sewing machine. mechanism. The first differential feed dog and the second differential feed dog are left and right with respect to the material feed direction so that the first differential feed dog is positioned on the left side of the second differential feed dog. Arranged,
The first operating member is disposed on a left side surface of the bed;
The feeding mechanism of the feeding arm type sewing machine according to claim 2, wherein the second operation member is disposed on a right side surface of the bed. The feed mechanism includes an amount of movement of the main feed dog and the main feed base in the front-rear direction per one rotation of the main shaft (hereinafter referred to as a main feed amount), a first differential feed amount, and a second differential feed amount. It has a main differential feed amount adjustment mechanism that changes and adjusts all at once.
The main differential feed amount adjusting mechanism includes a third operation member that is provided outside the sewing machine and collectively adjusts the main feed amount, the first differential feed amount, and the second differential feed amount. The feeding mechanism of the feeding arm type sewing machine according to claim 3.

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