JP2007195957A - Sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To uniform the stitch pitch by restraining unevenness of an actual feed per stroke through the difference in the thickness of a cloth. <P>SOLUTION: The sewing machine includes a feed regulator shaft disposed in parallel with a feed rock shaft in a sewing machine head and for regulating the feed pitch through horizontal motion of the feed rock shaft by turning and a control motor for turning the feed rock shaft to regulate the feed pitch. The sewing machine is provided with a link member connected to the feed rock shaft and for transmitting a regulated amount of the feed pitch through the horizontal motion to a needle bar frame, a heaving regulating mechanism for regulating heaving of an upward feed foot and a control part for regulating the feed pitch through the feed regulator shaft by controlling the motor from the heaving regulated by the heaving regulating mechanism. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sewing machine, and more particularly, to a sewing machine that feeds cloth by an upper feed leg, a presser foot, and a feed dog.

  Conventionally, as a sewing machine, a sewing machine that performs sewing while feeding a cloth with an upper feed leg, a presser foot, and a feed dog is known (see, for example, Patent Document 1). FIG. 13 is an explanatory view showing the operation of the upper feed foot, presser foot and feed dog when feeding the cloth. As shown in FIG. 13 (a), when the sewing needle 101 is lowered to pierce the cloths 102 and 103, the upper feed leg 104 is lowered at the same time. At this time, the cloths 102 and 103 are sandwiched between the upper feed leg 104 and the feed dog 105 that has risen by swinging substantially elliptically.

  Next, as shown in FIG. 13 (b), when the upper feed foot 104 presses the cloths 102 and 103, the presser foot 106 that has previously pressed the cloths 102 and 103 starts to rise, and the cloths 102 and 103. Get away from. At this time, the sewing needle 101, the upper feed leg 104, and the feed dog 105 swing leftward in the figure with the cloths 102 and 103 pierced and pinched. As a result, the cloths 102 and 103 are fed leftward. At this time, the presser foot 106 moves up and down along one axis.

  Then, as shown in FIG. 13C, when the feed movement of the cloths 102 and 103 by the cooperation of the upper feed leg 104 and the feed dog 105 is finished, the sewing needle 101 rises and begins to come off from the cloths 102 and 103. . At this time, the presser foot 106 descends and presses the cloths 102 and 103.

Thereafter, as shown in FIG. 13 (d), the presser foot 106 presses the fabrics 102 and 103 and simultaneously the upper feed foot 104 and the feed dog 105 begin to separate from the fabrics 102 and 103. Thereafter, the sewing needle 101, the upper feed leg 104, and the feed dog 105 swing while being separated from the cloths 102 and 103, and return to the initial position shown in FIG. The cloth is sent by repeating these operations.
JP-A-7-136363

  Here, FIG. 14 shows the trajectories L1 and L2 of the upper feed leg 104 during cloth feeding. The difference between the tracks L1 and L2 is caused by the change in the thickness of the cloth. The locus L1 is a locus when a thin cloth is sewn, and the locus L2 is a locus when a thick cloth is sewn. In the trajectories L1 and L2, since the difference S1 and S2 in the sewing direction occurs, the actual feed amount differs even if the feed pitch is the same. As a result, for example, when a cloth having a varying thickness is sewn, the stitch pitch becomes uneven depending on the thickness.

  The subject of this invention is suppressing the change of the actual feed amount by the difference in fabric thickness, and uniforming a stitch pitch.

The invention described in claim 1
An upper shaft rotatably supported in the sewing machine arm;
A needle bar swinging shaft disposed in parallel with the upper shaft in the sewing machine arm and rotatably supported;
A needle bar swinging base connected to the needle bar swinging shaft and supported so as to be swingable in the sewing direction;
A needle bar that is supported by the needle bar swing base so as to be movable up and down, and moves up and down in conjunction with the upper shaft;
An upper feed leg that is supported by the needle bar swinging base so as to move up and down and moves up and down in synchronization with the needle bar;
A vertical feed shaft rotatably supported in the sewing machine bed;
A horizontal feed shaft disposed in parallel with the vertical feed shaft in the sewing machine bed and supported rotatably;
One end is connected to the vertical feed shaft and the other end is connected to the horizontal feed shaft, and the feed moves in the sewing direction by the vertical movement by the vertical feed shaft and the horizontal movement by the horizontal feed shaft. In a sewing machine comprising a tooth and performing sewing while feeding a cloth with the feed dog and the upper feed leg,
A feed adjusting body shaft which is arranged in parallel with the horizontal feed shaft in the sewing machine bed and adjusts by turning a feed pitch by horizontal movement of the horizontal feed shaft;
An adjustment motor for rotating the feed adjusting body shaft in order to adjust the feed pitch;
A link member connected to the horizontal feed shaft and transmitting an adjustment amount of the feed pitch by the horizontal movement to the needle bar swinging base;
A vertical adjustment mechanism for adjusting the vertical movement of the upper feed leg;
And a controller that controls the adjustment motor based on the vertical amount adjusted by the vertical adjustment mechanism and adjusts the feed pitch by the feed adjuster shaft.

The invention according to claim 2 is the sewing machine according to claim 1,
A storage unit for storing adjustment data of the feed pitch corresponding to the vertical amount of the upper feed leg;
The control unit controls the adjustment motor by selecting, from the adjustment data, the feed pitch corresponding to the vertical amount adjusted by the vertical amount adjustment mechanism.

The invention according to claim 3 is the sewing machine according to claim 1 or 2,
The vertical amount adjusting mechanism includes a cylinder for adjusting the vertical amount of the upper feed leg in two stages,
The control unit controls the adjustment motor by selecting the feed pitch corresponding to the vertical amount adjusted by the cylinder from the adjustment data.

The invention according to claim 4 is the sewing machine according to claim 3,
The up / down amount adjusting mechanism includes an adjusting body for adjusting the up / down amount in multiple steps within a range smaller than the adjustment amount of the up / down amount by the cylinder,
The control unit controls the adjustment motor by selecting the feed pitch corresponding to the vertical amount adjusted by the adjustment body from the adjustment data.

  According to the present invention, since the feed pitch is adjusted based on the vertical amount adjusted by the vertical amount adjustment mechanism, even if the vertical amount of the upper feed leg is adjusted according to the cloth thickness, the actual feed amount The change can be suppressed, and as a result, the stitch pitch can be made uniform.

  Hereinafter, the sewing machine according to the present embodiment will be described with reference to the drawings. FIG. 1 is a perspective view illustrating a schematic configuration of the sewing machine according to the present embodiment. As shown in FIG. 1, the sewing machine 1 includes a sewing machine frame 2, a sewing machine table 3 on which the sewing machine frame 2 is placed, and a first motor 4 that is incorporated in the sewing machine frame 2 and serves as an adjustment motor of the present invention. A first motor drive circuit 5 for driving the first motor 4, a control unit 6 for controlling the first motor drive circuit 5, and various instructions for the control unit 6 arranged on the sewing machine table 3 are inputted. An operation panel 7 is provided.

  First, the configuration of the sewing machine arm 2 on the sewing machine arm 2 side will be described. FIG. 2 is a mechanism diagram of the sewing machine 1. As shown in FIG. 2, inside the sewing machine arm 8 in the sewing machine frame 2, an upper shaft 9 that is rotatably supported and a parallel movement with respect to the upper shaft 9 are rotatably supported. A needle bar swing shaft 10 and a needle bar swing base 11 connected to the needle bar swing shaft 10 and supported so as to be swingable in the sewing direction are provided. The upper shaft 9 and the needle bar swing shaft 10 extend in a direction perpendicular to the sewing direction. Further, a second motor 60 (see FIG. 10) as a main motor of the present invention is connected to the upper shaft 9, and the upper shaft 9 is rotated by the second motor 60.

  FIG. 3 is a side view showing a schematic configuration around the needle bar rocking base 11. As shown in FIG. 3, a needle bar swing shaft 10 is connected to an upper end portion of the needle bar swing base 11 so that the needle bar swing base 11 rotates. A needle bar 13 for holding the sewing needle 12 and an upper feed leg 14 for feeding the cloth are supported at the lower end of the needle bar swing base 11. As a result, when the needle bar swinging base 11 swings in the sewing direction as the needle bar swinging shaft 10 rotates, the needle bar 13 and the upper feed leg 14 swing in the sewing direction. Here, the needle bar 13 is connected to an eccentric cam 15 attached to the upper shaft 9 via a link member 16, and moves up and down in conjunction with the rotation of the upper shaft 9.

  On the other hand, a triangular link member 18 is connected to the upper end portion of the upper feed leg 14 via a link member 17. In addition, a presser foot 20 is connected via a link member 19 to a connection position 18 b (left side in FIG. 3) behind the connection position 18 a of the link member 17 in the triangular link member 18. The presser foot 20 is restricted from moving in the sewing direction and is supported only to move up and down.

  The transmission link 22 is connected to the upper connection position 18 c of the triangular link member 18 via the link member 21. One end of a swing shaft 23 that is linked to the upper shaft 9 is connected to the end of the transmission link 22 on the side where the link member 21 is not connected. FIG. 4 is an exploded view of components connected to the swing shaft 23. As shown in FIG. 4, the other end of the swing shaft 23 is connected to a rotation connecting portion 24 that rotates together with the swing shaft 23. A crank rod 25 connected to the upper shaft 9 is connected to the rotation connecting portion 24 via a link member 26. Thereby, the rotation of the upper shaft 9 is transmitted to the swing shaft 23 via the crank rod 25, the link member 26 and the rotation connecting portion 24, and the swing shaft 23 is rotated.

When the swing shaft 23 reciprocally rotates in conjunction with the upper shaft 9, the upper connection position 18 c of the triangular link member 18 swings in the sewing direction via the transmission link 22 and the link member 21. When the upper connection position 18c of the triangular link member 18 swings to the right in FIG. 3, the triangular link member 18 itself rotates clockwise and the upper feed leg 14 is lowered. When the upper feed leg 14 comes into contact with the needle plate H by the lowering, the lowering of the upper feed leg 14 is restricted, and the triangular link member 18 rotates clockwise around the connection position 18a. Thereby, the connection position 18b of the triangular link member 18 will rise, and the presser foot 20 will raise.
On the other hand, when the upper connecting position 18c of the triangular link member 18 swings to the left in FIG. 3, the triangular link member 18 itself rotates counterclockwise and the presser foot 20 is lowered. When the presser foot 20 comes into contact with the needle plate H by the lowering, the lowering of the presser foot 20 is restricted, and the triangular link member 18 rotates counterclockwise around the connection position 18b. Thereby, the connection position 18a of the triangular link member 18 will rise, and the upper feed leg 14 will raise.
In addition, since the needle bar swinging base 11 swings even when the upper feed leg 14 moves up and down, the upper feed leg 14 swings in the sewing direction while moving up and down.

  As shown in FIG. 4, a pair of clamping members 27 that are clamped so as to be coaxial with the link member 26 are connected to the crank rod 25, and the crank rod 25 is connected to the clamping member 27 via the clamping member 27. An adjustment block 28 is connected to adjust the initial position. The adjustment block 28 is fixed to one end of an adjustment shaft 29 that is rotatable in parallel with the upper shaft 9, and the inclination angle of the adjustment block 28 is changed by the rotation of the adjustment shaft 29. A protrusion 30 for adjusting the rotation angle is fixed to the adjustment shaft 29. The protrusion 31 of the protrusion 30 is in contact with a rotatable ball-shaped rotating plate 32. Since the distance from the rotating shaft to the outer periphery of the rotating plate 32 is different at each location, the protrusion 31 moves back and forth as the rotating plate 32 rotates. The protrusion 30 is rotated by the back-and-forth movement of the protrusion 31 so that the adjustment shaft 29 is rotated. A manual dial 33 is connected to the rotating plate 32, and the rotating plate 32 is rotated by rotating the dial 33.

  Further, as shown in FIG. 2, one end side of the arm 29 a is fixed to the adjustment shaft 29. The other end side of the arm 29 a is disposed at a position where it can contact the rod of the cylinder 51. When the cylinder 51 is lowered, the protrusion 31 to which the adjustment shaft 29 is fixed comes into contact with the rotary plate 32 connected to the dial 33, and a predetermined amount of clearance is secured between the rod of the cylinder 51 and the arm 29. Has been. When the cylinder 51 is lifted, it comes into contact with the arm 29a, rotates the adjustment shaft 29 in the clockwise direction, and the protrusion 31 is separated from the rotating plate 32 by a predetermined amount.

Based on FIG. 5, changes in the vertical amount or the raised position when the cylinder 51 is raised will be described. In FIG. 5, the state changes from the two-dot chain line to the state shown by the solid line.
When the cylinder 51 is raised, the adjustment shaft 29 rotates clockwise, and the adjustment block 28 rotates clockwise. When the adjustment block 28 rotates in the clockwise direction, the connection point P between the holding member 27 and the crank rod 25 moves from P1 to P2.
As the crank rod 25 reciprocates, the swing shaft 23 rotates more and the swing angle becomes larger (A <B), and the vertical amount of the upper feed foot 14 and the presser foot 20 increases, and the lift position Also rises.
When the cylinder 51 is lowered, the vertical amount of the upper feed foot 14 and the presser foot 20 becomes the vertical amount set by the dial 33. The vertical adjustment mechanism includes a dial 33, a rotating plate 32, a cylinder 51, an adjustment shaft 29, an adjustment block 28, a holding member 27, a crank rod 25, and the like. Further, the adjustment of the inclination angle of the adjustment block 28 by the dial 33 can be adjusted in multiple steps within a range smaller than the adjustment amount by the cylinder 51. That is, the dial 33 is the adjusting body in the present invention. Note that the adjustment body is not limited to the dial 33, and may be a lever, for example.

  Next, the configuration of the sewing machine frame 2 on the machine bed 50 side will be described. As shown in FIG. 2, inside the sewing machine bed 50 of the sewing machine frame 2, a lower shaft 37 interlocked with the upper shaft 9 via pulleys 34, 35 and a belt 36, and a rotating shaft arranged in parallel with the lower shaft 37. There are provided a vertical feed shaft 38 and a horizontal feed shaft 39 that are movably supported.

  FIG. 6 is an exploded view of components connected to the lower shaft 37. As shown in FIG. 6, a first horizontal extending link 45 extending laterally is provided at one end of the vertical feed shaft 38, and the first horizontal extending link 45 has a lower shaft 37. A crank rod 46 is connected to each other. When the lower shaft 37 rotates, the distal end portion 46a of the crank rod 46 moves in a circular arc in the front-rear direction (Y direction), and the operation is transmitted to the vertical feed shaft 38 via the first horizontal extending link 45, The vertical feed shaft 38 rotates.

  A second horizontal extending link 40 extending to the side is fixed to the other end of the vertical feed shaft 38. One end of a support member 42 is connected to the second horizontal extension link 40 via a link member 41. When the vertical feed shaft 38 reciprocates, the extending portion 40a of the second horizontal extending link 40 performs an arc motion in the vertical direction, so that the operation is transmitted by the link member 41 and the one end portion of the support member 42 moves up and down. It is like that. Thereby, the rotational movement of the vertical feed shaft 38 is converted into the vertical movement.

  On the other hand, a first vertical extending link 47 extending upward is fixed to one end of the horizontal feed shaft 39. One end of a substantially U-shaped link body 48 is rotatably attached to the first vertical extending link 47. A front end portion of a crank rod 49 connected to the lower shaft 37 is connected to a substantially central portion of the link body 48. A feed adjustment body shaft 52 is connected to the other end of the link body 48.

  The feed adjusting body shaft 52 is provided with a gap 53 in which the link body 48 is disposed, and a pair of inner surfaces 54 forming the gap 53 are formed with curved grooves 55. FIG. 7 is an explanatory view showing the inner surface of the feed adjusting body shaft 52. As shown in FIG. 7, shaft pins 80 having square pieces 81 attached to both ends are disposed in the groove 55. The shaft pin 80 pivotally supports the other end of the link body 48. Here, when the feed adjusting body shaft 52 rotates, the groove 55 also rotates, so that the amount of movement of the other end portion of the link body 48 in the horizontal direction can be adjusted. Specifically, if the groove 55 is close to the horizontal, the amount of movement in the horizontal direction is large. Conversely, if the groove 55 is close to the vertical, the amount of movement in the horizontal direction is small.

  FIG. 8 is an explanatory diagram showing the positional relationship between the link body 48, the crank rod 49 and the first vertically extending link 47. When the crank rod 49 moves up and down, the other end of the link body 48 is inclined by the groove 55. The horizontal movement is transmitted to the horizontal feed shaft 39 from one end of the link body 48 via the first vertical extension link 47, and the horizontal feed shaft 39 rotates. . As described above, the amount of movement of the other end of the link body 48 changes depending on the inclination of the groove 55. Therefore, if the inclination of the groove 55 is adjusted by rotating the feed adjusting body shaft 52, the amount of movement of the link body 48 and The amount of rotation of the horizontal feed shaft 39 can be adjusted.

  A second vertical extension link 43 extending upward is fixed to the other end of the horizontal feed shaft 39. The second vertical extending link 43 is connected to the other end portion of the support member 42. When the horizontal feed shaft 39 reciprocally rotates, the extending portion 43a of the second vertical extending link 43 moves in a circular arc in the horizontal direction, so that the operation is transmitted to the supporting member 42, and the other end portion of the supporting member 42 is horizontal. It comes to exercise. As a result, the support member 42 swings in the sewing direction while moving up and down by the vertical feed shaft 38 and the horizontal feed shaft 39 in this manner. Here, the rotational movement of the horizontal feed shaft 39 is converted into a horizontal movement. Since the rotation amount of the horizontal feed shaft 39 can be adjusted by the feed adjusting body shaft 52, the horizontal movement amount of the support member 42 and the feed dog 44, that is, the cloth feed pitch can be adjusted.

  FIG. 9 is an exploded perspective view showing the relationship between the feed adjusting body shaft and the first motor. As shown in FIG. 9, the feed adjusting body shaft 52 is connected to the first motor 4 via three link members 56, 57 and 58. That is, when the first motor 4 rotates the feed adjusting body shaft 52, the feed pitch is adjusted.

  A feed dog 44 that feeds the cloth together with the upper feed foot 14 is fixed to the support member 42. At the time of sewing, since the cloth can be fed by swinging the cloth between the upper feed leg 14 and the feed dog 44, the support member 42 and the upper feed leg 14 are swung. It is set to advance in the sewing direction with the pinched.

  As shown in FIG. 2, since the horizontal feed shaft 39 and the needle bar swing shaft 10 are connected via the link member 59, the rotation of the horizontal feed shaft 39 adjusted by the feed adjusting body shaft 52 is performed. The amount of movement is also reflected on the needle bar swing shaft 10. That is, when the feed adjusting body shaft 52 is rotated, the rotation amount of the horizontal feed shaft 39 is adjusted to adjust the feed pitch on the feed dog 44 side, and the rotation amount of the needle bar swing shaft 10 is also adjusted. The feed pitch on the upper feed leg 14 side is also adjusted. As a result, accurate feed pitch control is possible.

FIG. 10 is a block diagram illustrating a main control configuration of the sewing machine 1 according to the present embodiment. As shown in FIG. 10, the controller 6 receives the rotational speed of the first motor 4 from the encoder 61 and drives the first motor 4 by the encoder 61, and the second motor 60 by the encoder 62. , A second motor drive circuit 63 that drives the second motor 60, a position sensor 64 that detects the vertical amount of the upper feed foot 14 or the presser foot 20, and a thread trimming mechanism 65 for cutting the thread. And the operation panel 7 are electrically connected.
The control unit 6 includes a CPU 70, a ROM 71, a RAM 72, and an EEPROM 73. The CPU 70 develops a control program in the ROM 71 based on an instruction input to the operation panel 7 on the RAM 71, and a position sensor 64, encoders 61, 62. The first motor drive circuit 5 and the second motor drive circuit 63 are controlled in accordance with the detection result.

The operation panel 7 is inputted with a sewing start instruction, an interruption instruction, a thread trimming instruction, a stitch pitch, a vertical amount adjustment switching instruction by the cylinder 51, and the like.
For example, even if the position sensor 64 is provided in the vicinity of the upper feed foot 14 or the presser foot 20 and directly detects the vertical amount, it detects the rotation amount of the dial 33, the inclination angle of the adjustment block 28, and the like. It may be one that indirectly detects the vertical amount.
The ROM 71 stores a feed pitch table T (adjustment data) in which a feed pitch corresponding to each vertical amount and each stitch pitch as shown in FIG. 11 is set. This is based on the stitch pitch input from the operation panel 7 and the vertical amount detected by the position sensor 64, so that a feed pitch suitable for them can be selected. For example, when the stitch pitch is 10 mm and the vertical distance is 5 mm, the feed pitch stored in the F2 column in the feed pitch table T is selected.
The feed pitch is a numerical value that directly controls the first motor as the adjusting motor. The input stitch pitch is the pitch of the stitches finally formed on the cloth desired by the operator.

Next, the operation of the sewing machine 1 of the present embodiment will be described with reference to the flowchart of FIG.
When the stitch pitch is input on the operation panel 7, the CPU 70 executes a control program. In step S1, the CPU 70 selects a feed pitch corresponding to the input stitch pitch and the detection result of the position sensor 64 at the time of input from the feed pitch table T.

  In step S <b> 2, the CPU 70 controls the first motor drive circuit 5 to drive the first motor 4 in order to rotate the feed adjusting body shaft 52 so as to achieve the selected feed pitch.

  In step S3, the CPU 70 determines whether or not a sewing start instruction has been input to the operation panel 7. If not, the CPU 70 waits in that state, and if it has been input, proceeds to step S4. To do.

In step S4, the CPU 70 controls the first motor driving circuit 5 and the second motor driving circuit 63 to drive the first motor 4 and the second motor 60, and executes sewing together with the cloth feeding.
In step S5, the CPU 70 determines whether or not a thread trimming instruction has been input to the operation panel 7. If it has been input, the process proceeds to step S6, and if not, the process proceeds to step S7.
In step S6, the CPU 70 controls the first motor driving circuit 5 and the second motor driving circuit 63 to stop the first motor 4 and the second motor 60, and then controls the thread cutting mechanism 65 to execute the thread cutting. Then, the control program is terminated.

  In step S7, the CPU 70 determines whether or not an interruption instruction is input to the operation panel 7. If not input, the process proceeds to step S8. If input, the process proceeds to step S4.

In step S8, the CPU 70 controls the first motor drive circuit 5 to stop the first motor 4 and interrupt the sewing.
In step S9, the CPU 70 determines whether or not the vertical amount has been adjusted by the dial 33 or the cylinder 51 based on the detection result of the position sensor 64. If the detection result has not changed from before the interruption, no adjustment is made. The process proceeds to step S3, and if the detection result has changed from before the interruption, it is determined that the adjustment has been made, and the process proceeds to step S10.

  In step S10, the CPU 70 selects a feed pitch corresponding to the stitch pitch input in advance and the adjusted vertical amount from the feed pitch table T, and proceeds to step S2. Thereby, even if the vertical amount of the upper feed foot 14 and the presser foot 20 is adjusted during sewing, the feed pitch is adjusted, so that the stitch pitch can be made uniform.

  As described above, according to the sewing machine 1 of the present embodiment, since the feed pitch is adjusted based on the vertical amount of the upper feed leg 14, the vertical amount of the upper feed leg 14 is adjusted in accordance with the cloth thickness. However, the change in the actual feed amount can be suppressed, and as a result, the stitch pitch can be made uniform.

Of course, the present invention is not limited to the above-described embodiment and can be modified as appropriate.
For example, the feed pitch table T exemplified in this embodiment may be rewritten by operating the operation panel 7. As a result, it is possible to rewrite the feed pitch according to the individual difference of the sewing machine 1 before shipment, and it is possible to rewrite to the feed pitch that meets the user's request even after shipment.

It is a perspective view showing the schematic structure of the sewing machine of this embodiment. FIG. 2 is a mechanism diagram of the sewing machine of FIG. 1. FIG. 2 is a side view illustrating a schematic configuration around a needle bar rocking base provided in the sewing machine of FIG. 1. FIG. 2 is an exploded view of components connected to a swing shaft provided in the sewing machine of FIG. 1. It is explanatory drawing showing the inclination-angle fluctuation | variation of the adjustment block with which the sewing machine of FIG. 1 is equipped. FIG. 2 is an exploded view of components connected to a lower shaft provided in the sewing machine of FIG. 1. It is explanatory drawing showing the inner surface of the feed adjustment body axis | shaft with which the sewing machine of FIG. 1 is equipped. It is explanatory drawing showing the positional relationship of the link body with which the sewing machine of FIG. 1 is equipped, a crank rod, and a 1st perpendicular extension link. It is a disassembled perspective view showing the relationship between the feed adjustment body axis | shaft of FIG. 7, and a 1st motor. It is a block diagram showing the main control structure of the sewing machine of FIG. It is explanatory drawing showing an example of the feed pitch table as adjustment data of embodiment. It is a flowchart of the control program performed with the sewing machine of this embodiment. It is explanatory drawing showing operation | movement of the upper feed leg, presser foot, and feed dog at the time of sending cloth with the conventional sewing machine. It is explanatory drawing showing the locus | trajectory of the upper feed leg at the time of cloth feed with the conventional sewing machine.

Explanation of symbols

1 sewing machine 2 sewing machine frame 3 sewing machine table 4 first motor (motor for adjustment)
5 First Motor Drive Circuit 6 Control Unit 7 Operation Panel 8 Sewing Arm 9 Upper Shaft 10 Needle Bar Oscillating Shaft 11 Needle Bar Oscillating Base 12 Sewing Needle 13 Needle Bar 14 Upper Feeding Feet 15 Eccentric Cam 17 Link Member (Vertical Amount Adjustment) mechanism)
18 Triangular link member (vertical adjustment mechanism)
19 Link member (vertical adjustment mechanism)
20 Presser foot 21 Link member (up / down adjustment mechanism)
22 Transmission link (vertical adjustment mechanism)
23 Oscillating shaft (vertical adjustment mechanism)
24 Rotating connection 25 Crank rod (Up / down adjustment mechanism)
26 Link member (vertical adjustment mechanism)
27 Clamping member (vertical adjustment mechanism)
28 Adjustment block (vertical adjustment mechanism)
29 Adjustment axis (up / down adjustment mechanism)
30 Protrusion (up / down adjustment mechanism)
32 Rotating plate (vertical adjustment mechanism)
33 dial (vertical adjustment mechanism, adjuster)
37 Lower shaft 38 Vertical feed shaft 39 Horizontal feed shaft 44 Feed dog 51 Cylinder (vertical amount adjustment mechanism)
52 Feed adjusting shaft 59 Link member 60 Second motor (main motor)
T Pitch table (adjustment data)

Claims (4)

An upper shaft rotatably supported in the sewing machine arm;
A needle bar swinging shaft disposed in parallel with the upper shaft in the sewing machine arm and rotatably supported;
A needle bar swinging base connected to the needle bar swinging shaft and supported so as to be swingable in the sewing direction;
A needle bar that is supported by the needle bar swing base so as to be movable up and down, and moves up and down in conjunction with the upper shaft;
An upper feed leg that is supported by the needle bar swinging base so as to move up and down and moves up and down in synchronization with the needle bar;
A vertical feed shaft rotatably supported in the sewing machine bed;
A horizontal feed shaft disposed in parallel with the vertical feed shaft in the sewing machine bed and supported rotatably;
One end is connected to the vertical feed shaft and the other end is connected to the horizontal feed shaft, and the feed moves in the sewing direction by the vertical movement by the vertical feed shaft and the horizontal movement by the horizontal feed shaft. In a sewing machine comprising a tooth and performing sewing while feeding a cloth with the feed dog and the upper feed leg,
A feed adjusting body shaft which is arranged in parallel with the horizontal feed shaft in the sewing bed and adjusts the feed pitch by its rotation;
An adjustment motor for rotating the feed adjusting body shaft in order to adjust the feed pitch;
A link member connected to the horizontal feed shaft and transmitting an adjustment amount of the feed pitch by the horizontal movement to the needle bar swinging base;
A vertical adjustment mechanism for adjusting the vertical movement of the upper feed leg;
A sewing machine comprising: a control unit that controls the adjustment motor based on the vertical amount adjusted by the vertical amount adjustment mechanism and adjusts the feed pitch by the feed adjustment body shaft. The sewing machine according to claim 1, wherein
A storage unit for storing adjustment data of the feed pitch corresponding to the vertical amount of the upper feed leg;
The said control part selects the said feed pitch corresponding to the said up-and-down amount adjusted with the said up-and-down amount adjustment mechanism from the said adjustment data, The sewing machine characterized by the above-mentioned. The sewing machine according to claim 1 or 2,
The vertical amount adjusting mechanism includes a cylinder for adjusting the vertical amount of the upper feed leg in two stages,
The said control part selects the said feed pitch corresponding to the said up-and-down amount adjusted with the said cylinder from the said adjustment data, The sewing machine characterized by the above-mentioned. The sewing machine according to claim 3, wherein
The up / down amount adjusting mechanism includes an adjusting body for adjusting the up / down amount in multiple steps within a range smaller than the adjustment amount of the up / down amount by the cylinder,
The said control part selects the said feed pitch corresponding to the said up-and-down amount adjusted with the said adjustment body from the said adjustment data, The sewing machine characterized by the above-mentioned.

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