TWI642825B - Feeding mechanism of the feed-off-the-arm sewing machine - Google Patents

Abstract

Provide a feed mechanism of an out-arm type sewing machine, even if The left and right pieces of cloth to be sewn have different thicknesses or cloth materials, or when the curved portion is sewn, the right and left pieces of cloth can be appropriately conveyed in a manner desired by the operator.

The feed mechanism 6 is linked with the main shaft and along the cloth. The main feed teeth 19, the first differential feed teeth 20, and the second differential feed teeth 21 that perform elliptical motion in the vertical plane of the feed direction F feed the cloth placed on the cylinder 1 toward the cloth Transport to direction F. The feed mechanism 6 is provided with a first differential feed amount adjustment mechanism that changes and adjusts the amount of movement of the first differential feed tooth 20 in the front-back direction (hereinafter referred to as the first differential feed amount) in each revolution of the spindle 61. In addition, the feed mechanism 6 includes a second differential feed amount that changes and adjusts the amount of movement of the second differential feed tooth 21 in the front-rear direction (hereinafter referred to as the second differential feed amount) in each revolution of the spindle. Adjusting mechanism 71.

Description

Feed mechanism of out-arm type sewing machine

The present invention relates to a feeding mechanism of an out-arm type sewing machine that is easy to perform sewing operations of small sleeves and cylinders, and more particularly to a feeding mechanism that is most suitable for conveying cloths in the cloth feeding direction when sewing left and right cloths. Feed mechanism of arm type sewing machine.

In the present invention, the cloth feeding direction refers to the direction in which the cylinder extends from the lower part of the machine table.

In the present invention, front and rear refer to the front and rear directions of the cloth feed direction, and left and right refer to the left and right directions when the sewing machine is viewed from the front (the machine side in front of the cloth feed direction). In addition, the up and down direction refers to the up and down direction of the sewing machine.

A feed mechanism of an out-arm type sewing machine has been previously known as a feed mechanism of such an out-arm type sewing machine, which feeds the tooth linkage lever (in the lower part of the sewing machine and in the length direction of the cylinder extending in the horizontal direction) The feeding table is disposed inside the cylinder, and conveys the cloth along the extending direction of the cylinder (see Patent Document 1). The feed tooth link of the feed mechanism of this out-arm type sewing machine is composed of a forward feed link (main feed table) and a rear feed link (differential feed table). The tooth linkage rods are arranged side by side in the cylinder body. Forward feed teeth (main feed teeth) and rear are respectively installed at the front ends of the forward feed link and the rear feed link. Feed teeth (differential feed teeth). The forward feed teeth and the rear feed teeth are arranged one behind the other so that the forward feed teeth are located behind the rear feed teeth.

[Prior technical literature] [Patent Literature]

[Patent Document 1] Japanese Utility Model Registration No. 3151578 (Pages 6 to 8, Figures 1 to 5)

However, this out-arm type sewing machine is, for example, used to sew the lower thigh of briefs or women's underwear. Specifically, the left and right two pieces of cloth placed on the tube body are set from their respective end edges in a predetermined manner. The width is overlapped up and down to perform stitching. The two left and right pieces of fabric that are stitched are arranged on the feed teeth in a left and right direction and are conveyed in the cloth feeding direction. However, in the feeding mechanism of the out-of-arm sewing machine of the prior art, Or the raw material of the cloth is different, the feed amount of the left and right cloths will be different. If the curved part is sewn, the feed of the left and right cloths needs to be different. Therefore, in the case of performing the sewing as described above in the conventional out-arm type sewing machine, there is a problem that sewing is not desired by an operator who has wrinkles and the like on the sewing product.

Therefore, the present invention has been made in order to solve the problems as described above, and an object thereof is to provide an out-arm type sewing machine feed mechanism, even if the thickness of the left and right two pieces of cloth or the cloth materials are different, or the In the case where sewing is performed on the part, the left and right pieces of cloth can be appropriately transferred in a manner that the operator desires sewing.

The feeding mechanism of the out-arm type sewing machine of the present invention is as described in claim 1. In order to facilitate understanding of the content of the present invention, a description is given with reference to the symbols attached to FIGS. 1 to 4. The cylinders 1, 101 extend from the lower part of the stand 2, 102 to the cloth feeding direction F, and extend from the ends of the stand 2, 102 to the direction crossing the cloth feed direction F. The arms 3, 103, and the feed teeth that move in an elliptical motion along the vertical plane of the cloth feed direction F in conjunction with the main shaft, move the cloth placed on the cylinder 1, 101 toward the cloth feed direction F. The feed mechanism 6, 106 of the out-arm type sewing machine is characterized in that it includes a main feed table 14, a first differential feed table 15, and a second differential feed table 16, which are arranged along the cylinders 1, 101. The extension direction is arranged side by side in the cylinder body 1, 101; the main feed tooth 19 is installed at the front end of the main feed table 14; the first differential feed tooth 20 is opposite to the main feed tooth 19 It is located on the front side of the cloth feed direction F and is installed at the front end of the first differential feed table 15; the second differential feed tooth 21 is opposite to the The feed teeth 19 are located on the front side of the cloth feed direction F, are adjacent to the first differential feed teeth 20 in a direction crossing the cloth feed direction F, and are mounted on the second differential feed table 16 The front end; the first differential feed amount adjustment mechanism 61, which moves the first differential feed tooth 20 and the first differential feed table 15 in the front-rear direction in each revolution of the spindle (hereinafter referred to as the first Differential feed amount) to make adjustments; and a second differential feed amount adjustment mechanism 71 that adjusts the second differential feed tooth 21 and the second differential feed table 16 in each direction of the main shaft in each revolution The amount of movement (hereinafter referred to as the second differential feed amount) is adjusted.

According to this configuration, when the left and right two pieces of cloth having different thicknesses or cloth materials are sewn, or when the curved portion is sewn, etc., Equipped with the first differential feed amount adjustment mechanism 61 or the second differential feed amount adjustment mechanism 71, which can adjust the first differential feed amount or the second differential feed amount, respectively, so that the desired Stitched sewing.

The feeding mechanism of the out-arm type sewing machine of claim 1, as described in claim 2, may adopt the following configuration, in which the first differential feed amount adjustment mechanism 61 is provided outside the sewing machine to adjust the first difference A first operating member of a dynamic feed amount, and the second differential feed amount adjusting mechanism 71 includes a second operating member provided outside the sewing machine to adjust the second differential feed amount.

According to this configuration, since the first operation member or the second operation member is provided outside the sewing machine, the adjustment of the first differential feed amount or the second differential feed amount can be performed very easily.

The feeding mechanism of the out-arm type sewing machine of claim 2 may adopt the following configuration as described in claim 3, wherein the first differential feed tooth 20 and the second differential feed tooth 21 are relative to the cloth. The feed direction F is arranged left and right with each other so that the first differential feed tooth 20 is located on the left side of the second differential feed tooth 21, and the first operating member is arranged on the left side of the machine 2, 102. The second operating member is disposed on the right side of the machine 2 and 102.

According to this configuration, if the first differential feed amount of the first differential feed tooth 20 arranged on the left side with respect to the cloth feed direction F is to be adjusted, it is only necessary to adjust the first differential feed amount arranged on the machine 2, The first operation member on the left side of 102 can be operated by arranging an operation member corresponding to the differential feed tooth on the differential feed amount side to be adjusted and adjusting the differential feed amount. Machine side. Therefore, even on the side of the machine 2, 102 The first operation member and the second operation member are arranged. The operator does not hesitate to operate which operation member is better, and can change and adjust the desired differential feed amount.

The feeding mechanism of the out-arm type sewing machine of claim 3, as described in claim 4, may adopt the following structure, in which the feeding mechanism 6, 106 has the main feeding tooth for each revolution of the main shaft in a comprehensive manner. 19 and the main differential table 14 is a main differential feed amount adjustment mechanism for changing and adjusting the forward and backward movement amount (hereinafter referred to as the main feed amount), the first differential feed amount, and the second differential feed amount. 81. The main differential feed amount adjustment mechanism 81 is provided with a third operation provided outside the sewing machine to collectively adjust the main feed amount, the first differential feed amount, and the second differential feed amount. member.

According to this configuration, by operating the third operation member provided outside the sewing machine, the main feed amount, the first differential feed amount, and the second differential feed amount can be changed and adjusted collectively.

According to the feeding mechanism of the out-arm type sewing machine according to the present invention, even when the thickness of the left and right two pieces of cloth or the material of the cloth is different, or when the curved portion is sewn, it can still be separately compared to the left and right cloth Since the feed amount of the cloth can be easily adjusted, the left and right cloths can be appropriately conveyed in a manner that the operator desires stitching.

1‧‧‧ cylinder

2‧‧‧machine

3‧‧‧ arm

9‧‧‧ Up and down lever

10‧‧‧ front and rear lever

14‧‧‧Main feed table

15‧‧‧The first differential feed table

16‧‧‧ 2nd differential feed table

19‧‧‧Main feed tooth

20‧‧‧The first differential feed tooth

21‧‧‧ 2nd differential feed tooth

26‧‧‧Linked shaft

27‧‧‧Adjust the crank

32‧‧‧ swing axis

45‧‧‧The first differential adjustment crank

55‧‧‧ 2nd differential adjustment crank

61‧‧‧The first differential feed amount adjustment mechanism

62‧‧‧The first differential adjustment lever (the first operating member)

71‧‧‧The second differential feed amount adjustment mechanism

72‧‧‧ 2nd differential adjustment lever (2nd operating member)

81‧‧‧Main differential feed adjustment mechanism

82‧‧‧Main differential adjustment lever (3rd operation member)

FIG. 1 is a schematic perspective view showing an external appearance of a feeding mechanism of an out-arm type sewing machine according to an embodiment of the present invention.

Fig. 2 is a perspective view showing the appearance of the feed mechanism of the out-arm type sewing machine of Fig. 1.

Fig. 3 is an exploded perspective view showing the appearance of the feed mechanism of the out-arm type sewing machine of Fig. 1.

Fig. 4 is a schematic perspective view showing the external appearance of a feed mechanism of an out-arm type sewing machine according to another embodiment of the present invention.

[Form of Implementing Invention]

Hereinafter, a preferred first embodiment of the out-arm type sewing machine according to the present invention will be described with reference to FIGS. 1 to 3.

As shown in FIG. 1, the out-arm type sewing machine of the first embodiment includes a cylinder 1, a table 2, and an arm 3. The cylinder 1 extends from the lower part of the stand 2 in the horizontal direction. Let the direction in which the cylinder 1 extends from the lower part of the machine table 2 be the cloth feeding direction F. The machine 2 is oriented upward and extends in the cloth feed direction F. During sewing, the operator performs the sewing operation by visually viewing the cylinder 1 from the side of the machine 2. In order to easily observe the situation at hand, as in the first As shown in the figure, a step 2a is provided on the machine 2. At the end of the machine 2 extending in the cloth feeding direction F, the arm 3 extends in a direction crossing the cloth feeding direction F, and the front end of the arm 3 is located above the front end of the cylinder 1.

A feeding mechanism 6 is arranged below the machine 2 and the cylinder 1. A main shaft (not shown) is arranged inside the arm 3, and the main shaft is rotatable about the axis, and the feed mechanism 6 is driven by the rotation of the main shaft. The feed mechanism 6 includes a transmission shaft 7 that is disposed below the machine table 2 and extends horizontally left and right. The transmission shaft 7 is rotatably supported on the machine table 2 and rotates around the shaft 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. Here, one end of the up-and-down lever 9 and the front-rear lever 10 is connected to the eccentric portion 8.

An end of the pin 13 is rotatably inserted into the other end of the up-and-down lever 9. The other end of the pin 13 is inserted into and fixed to a pin hole 14ab of a piece 14a formed at the base end of the main feed table 14. In addition, a pin 22 is inserted into the pin hole 14ac of the block 14a, and both ends of the pin 22 are fixed to the pin hole 14ac so as to protrude from both ends of the pin hole 14ac. A slidable double-fork-shaped double-fork piece 15 a formed on the base end of the first differential feed table 15 is fitted to one end of the pin 22. In addition, a double-fork-shaped double-fork piece 16 a slidably formed on the base end of the second differential feed table 16 is fitted to the other end of the pin 22.

The main feed table 14, the first differential feed table 15, and the second differential feed table 16 are arranged side by side in the cylinder 1 along the extending direction of the cylinder 1. A first differential feed table 15 is disposed on the left side via a main feed table 14, and a second differential feed table 16 is disposed on the right side. Horizontal holes 14b, 15b, and 16b are formed in the main feed table 14, the first differential feed table 15, and the second differential feed table 16, respectively. The slider 17 is penetrated and inserted into the horizontal holes 14 b, 15 b, and 16 b, and the horizontal holes 14 b, 15 b, and 16 b can slide back and forth with respect to the slider 17. A pivot pin 18 rotatable around the shaft is inserted into the slider 17. The pivot pin 18 is arranged horizontally and orthogonally with respect to the extending direction of the cylinder body 1, and both ends of the pivot pin 18 are erected on the cylinder body 1.

A main feed tooth 19 is mounted on the front end of the main feed table 14 to adjust the vertical position. A first differential feed tooth 20 with an adjustable vertical position is mounted on the front end of the first differential feed table 15. The first differential feed tooth 20 is located on the front side of the cloth feed direction F with respect to the main feed tooth 19. A second differential feed tooth 21 is mounted on the front end of the second differential feed table 16 and has an adjustable vertical position. The second differential feed tooth 21 is located on the cloth feed relative to the main feed tooth 19 The front side of the direction F is adjacent to the first differential feed tooth 20 in a direction crossing the cloth feed direction F. The first differential feed tooth 20 and the second differential feed tooth 21 are arranged left and right with each other so that the first differential feed tooth 20 is positioned to the left of the second differential feed tooth 21 with respect to the cloth feed direction F. . By adjusting the mounting positions of the first differential feed teeth 20 in the up-down direction, the feed amount of the cloth relative to the left and right cloths can be adjusted separately.

A connecting portion of a crank 25 is connected to the other end of the front-rear lever 10, and a base of the crank 25 is fixed to the link shaft 26. The interlocking shaft 26 extending horizontally to the left and right is rotatably supported on the machine table 2 and swings around the shaft in conjunction with the rotation of the transmission shaft 7. In addition to the crank 25, a base of the adjustment crank 27 is fixed to the linkage shaft 26. The adjustment crank 27 has an arc-shaped arm portion 27 a extending rearward from the base portion. A slider 28 is inserted into the wrist portion 27a, and the slider 28 can slide on the wrist portion 27a. One ends of the connecting rod 29 and the connecting rod 30 are respectively connected to the left and right ends of the slider 28. The other end of the connecting rod 29 is connected to the 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. The swinging shaft 32 extending horizontally leftward and rightward is rotatably supported on the machine table 2 and swings around the shaft in conjunction with the swinging of the linkage shaft 26. A base of the crank 35 is fixed to 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 connecting rod 36 is connected to the middle of the main feeding table 14 via a screw 39 and a collar 40.

A base of the first differential adjustment crank 45 is fixed to the left end of the swing shaft 2. The first differential adjustment crank 45 has an arc-shaped arm portion 45 a extending upward from the base portion. The wrist 45a has a right opening A zigzag-shaped adjustment groove 45b. A slider 46 is inserted into the adjustment groove 45 b, and the slider 46 is connected to one end of the link 47 via a pin 50. The slider 46 is slidable in the adjustment groove 45b. The other end of the link 47 is connected to the middle of the first differential feeding table 15 via a screw 48 and a collar 49.

A base of the second differential adjustment crank 55 is fixed to the right end of the swing shaft 32. The second differential adjustment crank 55 includes an arc-shaped arm portion 55 a extending upward from the base portion. The wrist portion 55a has a left opening Shaped adjustment groove 55b. A slider 56 is inserted into the adjustment groove 55 b, and the slider 56 is connected to one end of the link 57 via a pin 60. The slider 56 is slidable in the adjustment groove 55b. The other end of the link 57 is connected to the middle of the second differential feeding table 16 via a screw 58 and a collar 59.

The main feed tooth 19, the first differential feed tooth 20, and the second differential feed tooth 21 are accompanied by the feeding mechanism 6 to the main feed table 14, the first differential feed table 15 and the second differential The drive of the feed table 16 (by the combination of up and down movements and forward and backward movements produces an elliptical movement in the vertical plane along the cloth feed direction F) from the grooves of the feed teeth of the needle plate not shown, when the main feed When the feed teeth 19, the first differential feed teeth 20, and the second differential feed teeth 21 protrude from the needle plate, the cloth placed on the cylinder 1 is transported along the cloth feed direction F.

Next, the driving of the main feed table 14, the first differential feed table 15, and the second differential feed table 16 will be specifically described. When the transmission shaft 7 rotates around the shaft in conjunction with the rotation of the main shaft, the main feed table 14, the first differential feed table 15, and the second differential feed table 16 are passed through the up-and-down lever 9, the pin 13 and the pin 22 The pivot pin 18 swings. Then, the main feed teeth 19, the first differential feed teeth 20, and the second differential feed are attached to the front ends of the main feed table 14, the first differential feed table 15, and the second differential feed table 16. The teeth 21 move up and down. In addition, if the transmission shaft 7 rotates around the shaft in conjunction with the rotation of the main shaft, Then, the interlocking shaft 26 swings around the shaft via the front-rear lever 10 and the crank 25. If the adjustment crank 27 swings around the linkage shaft 26 by the swing of the linkage shaft 26, the swing of the adjustment crank 27 is transmitted to the swing shaft 32 via the slider 28, the link 29, and the crank 31, and the swing shaft 32 swings around the shaft. By the swing of the swing shaft 32, the main feed table 14 moves forward and backward through the crank 35 and the link 36. In addition, the first differential adjustment crank 45 is swung around the swing shaft 32 by the swing of the swing shaft 32, and the swing of the first differential adjustment crank 45 is transmitted to the first through the slider 46, the pin 50, and the link 47. The differential feed table 15 then moves the first differential feed table 15 back and forth. In addition, the second differential adjustment crank 55 swings around the swing shaft 32 by the swing of the swing shaft 32, and the swing of the second differential adjustment crank 55 is transmitted to the second differential via the slider 56, the pin 60, and the link 57. The feed table 16 is moved so that the second differential feed table 16 moves forward and backward. That is, if the swing shaft 32 swings in conjunction with the rotation of the main shaft, the main feed teeth 19, which are mounted on the front ends of the main feed table 14, the first differential feed table 15, and the second differential feed table 16, The first differential feed tooth 20 and the second differential feed tooth 21 move forward and backward.

Next, a first differential feed amount adjustment mechanism 61 for changing and adjusting the first differential feed amount will be described. The first differential feed amount adjustment mechanism 61 includes a first differential adjustment lever 62 and a first differential scale 63 outside the machine 2. The first differential adjustment lever 62 and the first differential scale 63 are disposed on the left side of the lower portion of the machine table 2. A scale 63a corresponding to the magnitude of the first differential feed amount is marked on the first differential scale plate 63 and its rear edge. The first differential adjustment lever 62 is arranged so that its front end faces the scale 63 a of the first differential graduation plate 63 and extends rearward from the base end. 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 One end of the lever 65 is connected to the inside of the machine 2. A swing shaft 32 is inserted in the base of the lever 65. The lever 65 is rotatable about 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 in the up-down direction along the first differential scale 63, the lever 65 can be caused to swing about the swing axis 32 via the link 64. Thereby, the position of the slider 46 in the adjustment groove 45b of the first differential adjustment crank 45 is changed via the link 66 and the link 47. Further, by changing the distance between the swing shaft 32 and the slider 46, the swing amount of the link 47 connected to the slider 46 via the pin 50 is changed. As the first differential adjustment lever 62 is rotated upward, the slider 46 slides toward the lower end side of the adjustment groove 45b, so that the swing amount of the link 47 becomes smaller, so that the first differential feed amount becomes smaller. In addition, as the first differential adjustment lever 62 is rotated downward, the slider 46 slides toward the upper end side of the adjustment groove 45b, so that the amount of swing of the link 47 increases, so that the first differential feed amount increases. Through the above, the first differential feed amount is changed by the rotation operation of the first differential adjustment lever 62, but it has no effect on the main feed amount and the second differential feed amount.

Next, a second differential feed amount adjustment mechanism 71 for changing and adjusting the second differential feed amount will be described. The second differential feed amount adjustment mechanism 71 includes a second differential adjustment lever 72 and a second differential scale plate 73 outside the machine 2. The second differential adjustment lever 72 and the second differential scale plate 73 are arranged on the right side of the lower part of the machine table 2. A scale 73a corresponding to the magnitude of the second differential feed amount is marked on the second differential scale plate 73 and its rear edge. The second differential adjustment lever 72 is such that its front end faces the second differential scale 73 The degree 73a is arrange | positioned so that it may extend rearward from a base end. 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 an end connected to the lever 75 inside the machine 2. A swing shaft 32 is inserted in the base of the lever 75. The lever 75 is rotatable about the swing axis 32 relative to the swing axis 32. One end of the 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 adjustment and adjustment of the second differential feed amount will be described. When the second differential adjustment lever 72 is rotated in the up-down direction along the second differential scale 73, the lever 75 can be swung around the swing shaft 32 via the link 74. Thereby, the position of the slider 56 in the adjustment groove 55b of the second differential adjustment crank 55 is changed via the link 76 and the link 57. Further, by changing the distance between the swing shaft 32 and the slider 56, the swing amount of the link 57 connected to the slider 56 via the pin 60 is changed. As the second differential adjustment lever 72 is rotated upward, the slider 56 slides toward the lower end side of the adjustment groove 55b, so that the swing amount of the link 57 becomes smaller, so that the second differential feed amount becomes smaller. In addition, as the second differential adjustment lever 72 is rotated downward, the slider 56 slides toward the upper end side of the adjustment groove 55b, so that the amount of swing of the link 57 increases, and the second differential feed amount increases. Through the above, the second differential feed amount is changed by the rotation operation of the second differential adjustment lever 72, but it has no effect on the main feed amount and the first differential feed amount.

According to the above configuration, when the left and right two pieces of cloth having different thicknesses and cloth materials are sewn or when the curved portion is sewn, the first differential adjustment lever 62 or the second differential adjustment lever 72 are respectively used. By performing the rotation operation, the first differential feed amount and the second differential feed amount can be adjusted separately, so that the required sewing can be performed. In addition, Since the first differential adjustment lever 62 and the second differential adjustment lever 72 are provided outside the machine table 2, the first differential feed amount and the second differential feed amount can be adjusted very easily.

Next, the main differential feed amount adjustment mechanism 81 for collectively changing and adjusting 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 includes a main differential adjustment lever 82 and a main differential scale 83 outside the machine 2. The main differential adjustment lever 82 and the main differential scale 83 are disposed on the left side of the lower portion of the machine table 2. The main differential scale 83 is located rearward of the first differential scale 83. A scale 83a corresponding to the size of the main feed amount, the first differential feed amount, and the second differential feed amount is marked on the main differential scale plate 83 and its rear edge. The main differential adjustment lever 82 is arranged so that its front end faces the scale 83 a of the main differential scale 83 and extends rearward from the base end. 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 an end connected to the lever 85 inside the machine 2. A rotation shaft 86 is inserted in the base of the lever 85. The lever 85 is fixed to the rotation shaft 86. The rotating shaft 86 is horizontally extended to the left and right and is rotatably supported on the machine table 2. The other end of the link 30 is connected to the other end of the lever 85.

Here, the collective change adjustment of the main feed amount, the first differential feed amount, and the second differential feed amount will be described. If the main differential adjustment lever 82 is rotated in the up-down direction along the main differential scale 83, the lever 85 and the rotation shaft 86 can be swung around the rotation shaft 86 via the crank 84. Thereby, the position of the slider 28 on the wrist portion 27 a of the adjustment crank 27 is changed via the link 30. In addition, by changing the distance between the interlocking shaft 26 and the slider 28, the amount of swing of the swing shaft 32 connected to the link 29 via the crank 31 is changed. . With this, the swing amount of the link 36 through the crank 35, the swing amount of the link 47 through the first differential adjustment crank 45 and the slider 46, and the link 57 through the second differential adjustment crank 55 and the slider 56 The amount of swing is changed separately. As the main differential adjustment lever 82 is turned upward to operate, the slider 28 slides toward the front end side of the wrist portion 27a, so the amount of swing of the swing shaft 32 becomes smaller, so that the amount of swing of each link 36, 47, 57 also becomes smaller. Furthermore, the main feed amount, the first differential feed amount, and the second differential feed amount are collectively reduced. In addition, as the main differential adjustment lever 82 is turned downward to operate, the slider 28 slides toward the rear end of the wrist portion 27a, and the amount of swing of the swing shaft 32 becomes larger, so the amount of swing of each link 36, 47, 57 also increases. , And the main feed amount, the first differential feed amount, and the second differential feed amount are increased collectively. Based on the above, by the rotation operation of the main differential adjustment lever 82, the amount of movement in the forward and backward directions toward the main feed table 14, the first differential feed table 15, and the second differential feed table 16 is collectively performed. change. With the above configuration, by rotating the main differential adjustment lever 82 provided outside the machine 2 of the sewing machine, the main feed amount, the first differential feed amount, and the adjustment can be easily and collectively changed. 2nd differential feed.

The feed mechanism of the present invention is not limited to the first embodiment described above, and may be implemented in an out-arm type sewing machine shown in FIG. 4 (hereinafter, referred to as a second embodiment). The second embodiment shown in FIG. 4 will be described only with respect to the configuration different from that of the first embodiment, and the same configuration as that of the first embodiment will be denoted by the same symbol as that of the first embodiment. As shown in FIG. 4, the out-arm type sewing machine of the second embodiment includes a barrel 101, a table 102, and an arm 103. The cylinder 101 extends from the lower portion of the table 102 toward the cloth feeding direction F. The machine 102 is erected from the base end of the cylinder 101. The arm 103 is from the machine 102 The end portion extends in a direction crossing the cloth feeding direction F, and the middle of the arm 103 is curved, and the front end thereof is located above the cylinder 101. A horizontally extending and rotatable main shaft 107 is pivotally supported on the arm 103. An eccentric portion 108 is fixed to the main shaft 107, and the eccentric portion 108 is connected to one end of the upper and lower lever 109 and the front and rear lever 110 of the feeding mechanism 106. The other end of the up-and-down lever 109 is connected to the block piece 14 a formed at the base end of the main feed table 14 via a pin 13. The connecting portion of the crank 25 is connected to the other end of the front-rear lever 110. According to the above, as in the second embodiment, an out-arm type sewing machine of a different type from the first embodiment can also implement the feeding mechanism of the present invention, and the second embodiment can obtain similar functions and effects as the first embodiment.

The present invention is not limited to the embodiments described above. Those who are familiar with the technology can add various changes to the above embodiments for implementation within the scope of the essence of the present invention. The present invention also includes these modified forms.

Claims (2)

The feeding mechanism of an out-arm type sewing machine is a cylinder extending in the cloth feeding direction through the lower part of a self-standing machine, an arm extending from the end of the machine in a direction crossing the cloth feeding direction, And the feeding teeth which are linked with the main shaft and perform elliptical movement in the vertical plane along the feeding direction of the cloth, the cloth loaded on the cylinder is moved in the feeding direction of the cloth, and the feeding mechanism of the out-arm type sewing machine is characterized by It consists of: a main feed table, a first differential feed table, and a second differential feed table, which are arranged side by side in the cylinder along the extension direction of the cylinder; the main feed teeth are mounted on the cylinder; The front end of the main feed table; the first differential feed tooth is located on the front side of the cloth feeding direction relative to the main feed tooth and is installed at the front end of the first differential feed table; the second differential feed The feed tooth is located on the front side of the cloth feed direction with respect to the main feed tooth, is adjacent to the first differential feed tooth in a direction crossing the cloth feed direction, and is mounted on the second differential The front end of the feed table; the first differential feed amount adjustment mechanism, which should 1 The differential feed tooth and the amount of movement of the first differential feed table in the front-rear direction (hereinafter referred to as the first differential feed amount) are changed and adjusted; and a second differential feed amount adjustment mechanism for the main shaft The amount of movement of the second differential feed tooth and the second differential feed table in the forward and backward directions (hereinafter referred to as the second differential feed amount) is adjusted in each revolution, and the first differential feed is adjusted. The amount adjustment mechanism has a first operation member provided outside the sewing machine to adjust the first differential feed amount. The second differential feed amount adjustment mechanism has a second differential feed provided to the outside of the sewing machine. A second operating member of the same amount, the first differential feed tooth and the second differential feed tooth system are positioned with the first differential feed tooth relative to the cloth feed direction with the first differential feed tooth The left method is arranged left and right with each other, and the first operation member is disposed on the left side of the machine, and the second operation member is disposed on the right side of the machine. For example, the feed mechanism of the out-arm type sewing machine of claim 1, wherein the feed mechanism has a total amount of movement of the main feed tooth and the main feed table in the front-rear direction in each revolution of the main shaft (hereinafter referred to as Main feed amount), a first differential feed amount, and a second differential feed amount. The main differential feed amount adjustment mechanism is provided. The main differential feed amount adjustment mechanism is provided outside the sewing machine and is used for The third operating member that collectively adjusts the main feed amount, the first differential feed amount, and the second differential feed amount.