JP2017029337A - sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform sewing along a curved line more favorably.SOLUTION: A sewing machine includes: a first feeding mechanism 30 for performing feeding of a workpiece by a wheel 31 arranged in a state of being inclined obliquely next to a needle location; a second feeding mechanism 50 arranged on the upstream side in the feeding direction with respect to the first feeding mechanism, including a feeding body 51 coming into contact with the workpiece in a location eccentric from the rotation center, and for performing feeding of the workpiece along an arc around the rotation center; a control device 90 for individually controlling a driving source 33 of the first feeding mechanism and a driving source 53 of the second feeding mechanism; and a side end detection part 17 for detecting a location of a side end part of the workpiece regarding the direction crossing the feeding direction of the workpiece in the needle location. The control device controls the rotational speed of the driving source of the second feeding mechanism according to the location of the side end part of the workpiece detected by the side end detection part.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a sewing machine suitable for sewing along a curved line.

For example, when performing sewing along a curve on a workpiece, it is conventionally performed that an operator performs sewing by pressing the workpiece with the left hand and sliding the right hand around the left hand. Has been done.
In the case of this sewing, skilled skills are required to perform sewing along the trajectory of the target curve, and it is a problem that only workers with excellent skills can perform sewing.

In view of this, there has been proposed a sewing machine provided with a wheel feed that cooperates with the feed dog and feeds the workpiece at a position adjacent to the needle drop position.
In this sewing machine, the rotation axis of the wheel for wheel feeding is inclined with respect to the horizontal direction, and the workpiece can be fed along the arc shape of the ground contact area of the wheel by rotating the wheel with a motor. The workpiece can be sent along a curve, and sewing along the curve can be performed more easily (see, for example, Patent Document 1).

JP-A-6-15077

However, since the sewing machine equipped with the conventional wheel feed feeds next to the needle drop position, it tends to turn around the needle drop position, and the traveling direction of the sewing product tends to swing to the left or right. There was a problem that it was difficult to sew along a desired curve.
In addition, the conventional sewing machine equipped with wheel feeding can feed the workpiece along a curve with a constant curvature, but cannot cope with the change in the curvature of the curve. Because there is no choice but to manipulate the material to be sewn, the influence of the skill difference of the worker was inevitable.

  An object of the present invention is to provide a sewing machine capable of performing sewing along a curve with a certain level of quality.

The invention according to claim 1 is a sewing machine,
A first feed mechanism that feeds the workpiece by a wheel that is disposed obliquely next to the needle entry position;
A feed body that is disposed upstream of the first feed mechanism in the feed direction and that contacts the sewing product at a position eccentric from the rotation center, and feeds the sewing product along an arc around the rotation center. A second feed mechanism for performing
A control device for individually controlling the drive source of the first feed mechanism and the drive source of the second feed mechanism;
A side end detector that detects the position of the side end of the sewing product in a direction that intersects the feed direction of the sewing product at the needle drop position,
The said control apparatus controls the rotational speed of the drive source of a said 2nd feeding mechanism according to the position of the side edge part of the said to-be-sewn product which the said side edge detection part detected.

The invention according to claim 2 is the sewing machine according to claim 1,
An end detection unit that detects the passing of the end of the sewing product in the sewing direction at the needle drop position;
The control device controls the sewing motor serving as a sewing drive source to end sewing in accordance with the passage of the end portion of the sewing product detected by the end detection portion.

The invention according to claim 3 is the sewing machine according to claim 1 or 2,
The second feeding mechanism is characterized in that feeding is performed by rotating the feeding body that is in spherical contact with the workpiece.

The invention according to claim 4 is the sewing machine according to claim 3,
The second feeding mechanism includes a support shaft that supports the feeding body,
The feed body is connected with the center of rotation fixed to the support shaft,
The support shaft is disposed in an inclined state with respect to the needle plate.

The invention according to claim 5 is the sewing machine according to claim 1 or 2,
The second feeding mechanism is characterized in that a wheel disposed in an inclined state with respect to the needle plate is used as the feeding body, and feeding is performed by rotating the wheel.

In the present invention, since the sewing product is fed by the first feeding mechanism and the second feeding mechanism, the needle drop position is centered as compared to the case of feeding by the wheel only next to the needle drop position. This makes it difficult for the turning to occur, and makes it possible to stabilize the traveling direction of the sewing object. For this reason, it is possible to perform sewing along a desired curve, and to improve the sewing quality.
Furthermore, since the control apparatus which controls the rotational speed of the drive source of a 2nd feed mechanism according to the position of the side edge part of the to-be-sewn product detected by the side edge detection part is provided, the side edge part of the to-be-sewn object is curved. Even in this case, the second feeding mechanism can correct this appropriately, and sewing can be performed more accurately along the side end portion curved with respect to the workpiece.
In addition, since the control device performs control so as to automatically perform sewing along the side end portion of the workpiece, even a worker who does not have a skilled technique has a curved shape with high sewing quality. Sewing can be performed.

It is a perspective view of the sewing machine concerning this embodiment. FIG. 2 is a perspective view of the sewing machine viewed from a direction different from that in FIG. 1. It is a front view of the needle drop position vicinity in a sewing machine. It is a top view of the needle drop position periphery in a sewing machine. It is a top view of the needle drop position periphery in the sewing machine which showed arrangement | positioning of a termination | terminus sensor. It is a block diagram which shows the control system of a sewing machine. It is a flowchart of the sewing operation | movement by the control apparatus of a sewing machine.

[Whole structure of sewing machine]
Hereinafter, a sewing machine 10 according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view in which a part of the configuration of the sewing machine 10 is omitted, and FIG. 2 is a perspective view as seen from another direction.

  The sewing machine 10 captures a needle bar 12 that holds a sewing needle 11 at the lower end, a needle bar vertical movement mechanism (not shown) that moves the needle bar 12 up and down, and an upper thread passed through the sewing needle 11. A hook mechanism (not shown) that entangles the lower thread, and a main feed mechanism (not shown) that feeds the workpiece along the predetermined straight direction by letting the feed dog protrude and retract from the opening of the needle plate 13. A first feed mechanism 30 that feeds the workpiece by a wheel 31 that is disposed obliquely adjacent to a needle hole that is a needle drop position of the needle plate 13, and a first feed mechanism 30. A second feed mechanism 50 that feeds by rotating a feed body 51 that is arranged on the upstream side in the feed direction and contacts the workpiece in a spherical surface; and a sewing machine frame 20 that carries the above-described configurations; And a control device 90 for controlling each of the above components.

The sewing machine frame 20 extends in parallel with the sewing machine bed portion 21 from a sewing machine bed portion 21 located at the lower portion, a standing trunk portion (not shown) raised from the sewing bed portion 21, and an upper end portion of the standing trunk portion. Sewing machine arm 23.
The needle plate 13 described above is provided on the upper surface of the sewing machine bed portion 21 on one end side.
Hereinafter, the longitudinal direction of the sewing machine bed portion 21 and the sewing machine arm portion 23 and the horizontal direction is the Y-axis direction, and the horizontal direction orthogonal to the Y-axis direction is both the X-axis direction, the X-axis direction, and the Y-axis direction. A vertical vertical direction perpendicular to the Z axis direction is taken as a Z-axis direction. Also, the X-axis direction is parallel to the feed direction of the sewing product by the main feed mechanism, and the downstream side of the feed direction is “front”, the upstream side is “rear”, and the left hand side is facing “front”. Is described as “left” and the right hand side is “right”.

  The needle bar vertical movement mechanism includes a sewing machine motor 14, an upper shaft that is rotated by the sewing machine motor 14, and a crank mechanism that converts the rotational force of the upper shaft into a vertical driving force and applies it to the needle bar. The detailed description is omitted.

  The hook mechanism is a so-called full-rotation vertical hook, a hook shaft that supports the vertical hook, and a gear mechanism that transmits torque to the hook shaft at double speed from a vertical feed shaft that rotates in conjunction with the upper shaft via a belt mechanism. Detailed description will be omitted.

The main feed mechanism has a feed dog that moves forward and backward when it protrudes from the opening of the needle plate 13 and projects from the opening, and a vertical feed that fully rotates in conjunction with the upper shaft. A shaft and a horizontal feed shaft that is connected to a vertical feed shaft via a cam crank mechanism and reciprocates, a feed dog is held, and a reciprocating operation in the X-axis direction and the Z-axis direction from the horizontal feed shaft and the vertical feed shaft It is a well-known structure provided with the feed stand to which the reciprocating motion is given.
The upper and lower reciprocating motions and the reciprocating motion along the X-axis direction are transmitted to the feed base, and these are combined to form an elliptical motion along the X-axis direction. The feed dog moves upward from the opening of the needle plate 13. When protruding, it also moves in the X-axis direction and feeds the workpiece.
The feed direction of the sewing product by the feed dog of the main feed mechanism is a straight direction parallel to the X-axis direction.

A needle hole (not shown) is formed at the center of the plurality of openings where the feed dogs appear and disappear, and the sewing needle 11 drops the needle hole.
And the cloth presser 15 which presses down a to-be-sewn material from the top is arrange | positioned on the needle hole. The cloth presser 15 is supported by the lower end portion of the cloth presser bar 16 suspended from the sewing machine arm portion 23.
The cloth presser bar 16 is supported inside the sewing machine arm portion 23 so as to be movable up and down and pressed downward by a spring. Therefore, the cloth presser 15 can press the workpiece by this spring pressure.
Further, the sewing machine arm portion 23 is equipped with a press-up lever (not shown) so that the cloth presser 15 and the cloth presser bar 16 can be lifted upward against the spring by the turning operation of the press-up lever. Yes.

[First feed mechanism]
The first feed mechanism 30 is adjacent to a needle hole (not shown) of the needle plate 13 which is a needle drop position, and a wheel 31 disposed obliquely and a support for rotatably supporting the wheel 31. The arm 32, the first feed motor 33 that serves as a rotational drive source for the wheels 31, the main drive pulley 34 that is provided on the output shaft of the first feed motor 33, and the machine arm 23 that rotates behind the main drive pulley 34. An intermediate pulley 35 that is supported, a driven pulley 36 that is rotatably mounted on the support arm 32 below the intermediate pulley 35, a bevel gear 37 that is coaxially connected to the driven pulley 36, and a wheel 31 that is coaxial. A coupled bevel gear 38; a timing belt 39 spanned between the main pulley 34 and the intermediate pulley 35; and a timing belt 40 spanned between the intermediate pulley 35 and the driven pulley 36. .

3 is a front view of the configuration around the needle drop position as seen from the front, and FIG. 4 is a plan view as seen from above.
As shown in FIG. 3 and FIG. 4, the rotation center line C of the wheel 31 is parallel to the YZ plane and is inclined in the left-down direction with respect to the Y-axis direction. The rotation center line C of the wheel 31 is arranged to intersect the center line of the sewing needle 11.
The wheel 31 is formed of a material having an elastic outer periphery, and presses against the sewing object on the needle plate 13 while causing some elastic deformation. Therefore, the contact area of the wheel 31 with respect to the sewing object has an arc shape that is convex toward the right side (needle drop position side). Further, the radius of curvature of the arc of the contact region decreases as the inclination angle with respect to the Y-axis direction increases.

The wheel 31 is given a rotational force clockwise as viewed from the left. Accordingly, the first feed mechanism 30 acts to feed the workpiece in a direction that curves to the left while moving forward from the needle drop position.
As described above, the main feed mechanism feeds the workpiece straightly forward by the feed dog. Therefore, if the feed speed of the first feed mechanism 30 is decreased to lower the conveyance capacity of the sewing product, the influence of the main feed mechanism becomes relatively large, and the feed in the straight direction is performed. When the feeding speed of the mechanism 30 is increased to increase the workpiece conveyance capacity, the influence of the main feeding mechanism becomes relatively small, and feeding close to the left bending direction is performed.
The rotation speed of the wheel 31 is set in consideration of the balance with the main feed mechanism.

The first feed motor 33 is supported by the sewing machine arm 23 so that the output shaft is parallel to the Y-axis direction, and the main driving pulley 34, the intermediate pulley 35, and the driven pulley 36 are also parallel to the Y-axis direction. It is supported so that it can rotate around the line.
On the other hand, although the rotation center line C of the wheel 31 is inclined, the bevel gear 38 connected to the wheel 31 so as to be interlocked and rotated and the bevel gear 37 connected to the driven pulley 36 so as to be interlockingly rotated are both tooth tips. Is inclined with respect to the center of rotation, and by engaging these, a rotational force can be favorably applied to the inclined wheel 31.

[Secondary feed mechanism]
The second feed mechanism 50 is attached to the sewing product at a position slightly upstream from the vicinity of the needle drop position where the wheel 31 of the first feed mechanism 30 contacts the sewing product and slightly to the left. The product to be sewn is fed in contact with the top.
The second feed mechanism 50 includes a feed body 51 that comes into contact with the workpiece on the needle plate 13 from above, a support shaft 52 that supports the feed body 51, and an output shaft that is directly connected to the support shaft 52. A second feed motor 53 and a support mechanism 54 that supports the second feed motor 53 are provided.

The feed body 51 is a rotating body provided with a spherical contact surface with a sewing object that protrudes downward, and a support shaft 52 is connected to the center of rotation in a fixed state.
The second feed motor 53 is supported on the sewing machine arm portion 23 by the support mechanism 54. The support mechanism 54 supports the second feed motor 53 by a well-known slide guide mechanism so that the position of the second feed motor 53 can be adjusted in the X-axis direction, the Y-axis direction, and the Z-axis direction. It is supported so that it can tilt around the Y axis. The adjusted position and inclination angle of the second feed motor 53 can be fixed with a fixing screw or the like.

Then, by adjusting the position and inclination angle of the second feed motor 53 by the support mechanism 54, the support shaft 52 of the feed body 51 is tilted somewhat rearward from the state parallel to the Z-axis direction. ing.
As a result, the feed body 51 comes into contact with the workpiece at a position S that is eccentric rearward from the support shaft 52 that is the center of rotation. Since the second feed motor 53 applies a rotational force in a counterclockwise direction in plan view to the feed body 51, the feed body 51 is behind the support shaft 52 as shown in FIG. Thus, a conveying force is applied to the workpiece along the arcuate arrow Fs that protrudes toward the rear side.

The wheels 31 of the first feed mechanism 30 urge the feed in the direction of arrow Fm in FIG. 4 due to the inclination, and the feed bodies 51 of the second feed mechanism 50 move in the direction of the arrow Fs in FIG. Encourage feeding. When it is necessary to perform sewing along the curved right end H1 of the workpiece H in FIG. 4, the arrow Fm direction, which is the feed direction of the first feed mechanism 30, is the right end H1 of the workpiece H. Therefore, when the feed by the first feed mechanism 30 is sufficiently stably and effectively performed, proper sewing can be performed only by the feed by the first feed mechanism 30. However, when the feed of the first feed mechanism 30 does not sufficiently act or shake due to the type of fabric of the workpiece H, or the curvature radius of the right end H1 of the workpiece H is the first feed. If it is smaller than the feed direction Fm of the mechanism 30, there is a possibility that proper sewing cannot be performed along the right end H1.
In such a case, the feed by the second feed mechanism 50 is performed so that the sewing object H is moved to the right in the feed direction upstream of the contact position (needle drop position) of the first feed mechanism 30. The swivel component can be added to the feed, and sewing can be performed along the right end.

Further, on the upper surface of the sewing machine bed portion 21, on the upstream side in the feed direction of the sewing product H with respect to the needle drop position, the right end of the sewing product H in the Y-axis direction, which is the direction intersecting the feed direction of the sewing product H A side end sensor 17 is provided as a side end detection unit that detects the position of the portion H1.
The side end sensor 17 is a so-called line sensor in which a plurality of light receiving elements are formed side by side along the Y-axis direction, and the right end H1 of the sewing object H passes through the detection range of the side end sensor 17. Then, a part of the light receiving elements on the left side are shielded and the amount of received light decreases, so that the rightmost light receiving element of the plurality of light receiving elements in which the amount of received light is reduced is positioned at the right end of the sewing product H. It can be detected as a passing position of H1.
The side end sensor 17 inputs the detection position of the right end H1 of the sewing object H based on the change in the amount of received light to the control device 90 at a predetermined detection cycle.

In addition, on the lower surface of the sewing machine arm portion 23, the feed of the sewing product H is on the upstream side in the feed direction of the sewing product H with respect to the needle drop position and directly on the downstream side of the side end sensor 17. A termination sensor 18 is provided as a termination detection unit that detects passage of a termination portion that is an upstream end portion in the direction.
The termination sensor 18 includes a light emitting element and a light receiving element. The light emitting element emits light from above to the detection position, and the light receiving element receives reflected light of the light emitted from the light emitting element by the needle plate 13. The sewing position H exists during the sewing at the detection position, and the irradiation light from the light emitting element is shielded and sufficient reflected light cannot be obtained. And if the terminal part of the to-be-sewn material H passes a detection position, irradiation light will be reflected by the needle plate 13, and a light receiving element can receive the reflected light.
That is, when the end portion of the sewing product H passes through the detection position of the end sensor 18, the amount of light received by the light receiving element increases, so that the passage of the end portion of the sewing product H can be detected.
The end sensor 18 inputs a change in the amount of received light due to the passage of the end portion of the sewing object H to the control device 90 at a predetermined detection cycle.

[Sewing machine control system]
As shown in FIG. 6, the control device 90 includes a display panel 94 that displays various settings relating to sewing and the current state of the sewing machine, and screen selections and commands for performing various settings provided in the display panel 94. A setting switch 95 as setting input means for inputting numerical values and a start switch 98 for inputting the start of sewing are connected via an input / output circuit (not shown).

  The start switch 98 is means for inputting a drive command for a sewing operation to the control device 90 by an input operation. That is, when the start switch 98 is input, the control device 90 performs operation control for starting sewing.

  From the setting switch 95, the basic feed speed by the first feed mechanism 30 (basic rotational speed of the first feed motor 33), the basic feed speed by the second feed mechanism 50 (basic rotational speed of the second feed motor 53). ) Etc. are input by the operator.

The control device 90 is connected to the sewing machine motor 14, the first feed motor 33, and the second feed motor 53, which are the control targets, via drive circuits 14a, 33a, and 53a, respectively.
In addition, the side end sensor 17 and the end sensor 18 are connected to the control device 90. The drive circuits 14a, 33a, 53a, the side end sensor 17 and the end sensor 18 are connected to the control device 90 via an interface (not shown).
The control device 90 includes a CPU 91 that performs various controls, and a memory 92 in which a control program that executes operation control of the sewing machine 10 is written.

[Sewing operation]
The sewing operation control of the sewing machine 10 having the above configuration will be described based on the flowchart of FIG.
Here, the case where the front fabric is sewn on the cup material of the brassiere as the workpiece H is illustrated. This to-be-sewn product H has a curved shape with a curved outer edge shape, and sewing is performed along the outer edge.

When the start switch 98 is operated, the CPU 91 of the control device 90 starts driving the sewing machine motor 14 and starts sewing (step S1).
Further, along with the start of driving of the sewing machine motor 14, the first feed motor 33 and the second feed motor 53 are started to drive in the prescribed rotation direction at the respective basic rotation speeds (steps S3 and S5).

  As a result, the workpiece H is fed forward by the main feed mechanism as shown in FIG. 4 and is also fed to the left by the first and second feed mechanisms 30 and 50 to be sewn. Sewing is performed along the right edge of the object.

Furthermore, the CPU 91 reads the detection position of the right end H1 of the sewing product H by the side end sensor 17 (step S7).
And it controls to change the rotational speed of the 2nd feed motor 53 according to the reading result of the side edge sensor 17 (step S9). For example, when the right end H1 of the sewing object H is shifted to the left from the range of the proper position, the curve feed to the left side is insufficient, so that the rotation speed of the second feed motor 53 is increased. Update to high speed. Further, when the right end H1 of the sewing object H is shifted to the right from the range of the proper position, the curve feed to the left side is excessive, so that the rotation speed of the second feed motor 53 is further reduced. Update to speed.

Next, the CPU 91 reads the end sensor 18 and determines whether or not passage of the end of the sewing product H has been detected (step S11, see FIG. 5).
As a result, when the passage of the end portion of the sewing object H is not detected, the process returns to step S7, and the reading of the side end sensor 17 and the update of the rotation speed of the second feed motor 53 are performed again.
When the passage of the end portion of the sewing product H is detected, the number of stitches corresponding to the distance from the detection position of the end sensor 18 to the needle drop position is counted before the sewing machine motor 14 and the first feed. The drive of the motor 33 and the second feed motor 53 is stopped (step S13), and the sewing is finished.

[Effect of the embodiment]
As described above, the sewing machine 10 includes the first feed mechanism 30 that feeds the sewing object H by the wheel 31 that is disposed obliquely next to the needle drop position, and the first feed mechanism 30. And a second feed mechanism 50 that feeds the workpiece H along the arc-shaped arrow Fs. Since the feed can be performed in the curved direction at the two contact areas with respect to the sewn product H, it is possible to perform the sewing along the desired curve stably while suppressing the right and left blurring.

  Further, since the control device 90 individually controls the rotation speed of the first feed motor 33 and the second feed motor 53 in the sewing machine 10, the first and second feed motors 33, 53 or the second feed motor 33 are controlled. By changing the rotational speed of only the feed motor 53, the radius of curvature of the sewing curve can be changed, and more various kinds of sewing can be performed.

The sewing machine 10 also includes a side end sensor 17 that detects the position of the right end H1 of the sewing product H in a direction (Y-axis direction) that intersects the feed direction of the sewing product H at the needle drop position. Reference numeral 90 controls the rotational speed of the second feed motor 53 according to the position of the right end H1 of the sewing object H detected by the side end sensor 17.
For this reason, even if it is a case where it cannot sew correctly along the curved side edge part of the to-be-sewn material H only with the 1st feed mechanism 30, the 2nd feed mechanism 50 can correct this suitably. Thus, it becomes possible to perform sewing more accurately along the side end portion curved with respect to the sewing object H.
In addition, since the sewing machine 10 automatically performs sewing along the side end portion of the sewing object H under control, even a worker who does not have a skilled technique performs sewing with a curved shape with high sewing quality. It becomes possible.

Further, the sewing machine 10 includes a termination sensor 18 that detects passage of the sewing product H on the terminal side in the feed direction of the sewing product H at the needle drop position, and the control device 90 detects the sewing product detected by the termination sensor 18. In accordance with the passage of the end portion of H, the sewing motor 14 serving as a sewing drive source is controlled to end sewing.
Therefore, the sewing machine 14 can be sewn along the curved portion of the sewing object H, and the sewing machine motor 14 can be automatically stopped after the sewing is completed. Sewing along the curve is possible.

Further, the second feed mechanism 50 rotates the feed body 51 that contacts the workpiece H with a spherical surface to feed the workpiece to be sewn along a curved curve more effectively. It is possible to improve the sewing quality. Further, if the feeding body 51 is spherical, it is easy to tolerate the movement of the sewing object H in a direction deviating from the direction along the arc around the rotation center, and the sewing object is pulled. Thus, it is possible to suppress the occurrence of a wrinkle state and realize high-sewing quality sewing.
Further, by arranging the support shaft 52 of the feed body 51 in an inclined state with respect to the needle plate 13, it is possible to easily realize a configuration in which the feed body 51 comes into contact with the sewing object at a position eccentric from the rotation center. Is possible.

[Others]
The feed body 51 of the second feed mechanism 50 is hemispherical, but may be a flatter dish. Even in this case, it is desirable that the surface on the side to be sewn is a spherical surface. That is, the feed body 51 can be made flatter by forming a part of a spherical surface having a larger curvature radius.
Further, the feed body 51 may be constituted by wheels as in the first feed mechanism 30. In that case, the feed body 51 can be configured with a member that is easier to obtain, and the work to be sewn can be sent in the same manner as in the case of a hemisphere, and the manufacturing cost of the sewing machine 10 can be reduced.

  The sewing machine 10 has exemplified the case where the first and second feed mechanisms 30 and 50 are mounted on a so-called lockstitch sewing machine, but the first and second feeds can be applied to any sewing machine other than an automatic machine that performs XY feed. It is possible to carry out sewing along a curve by mounting the mechanisms 30 and 50.

DESCRIPTION OF SYMBOLS 10 Sewing machine 11 Sewing needle 12 Needle bar 13 Needle plate 14 Sewing machine motor 17 Side end sensor 18 End sensor 30 First feed mechanism 31 Wheel 33 First feed motor (drive source)
50 Second feed mechanism 51 Feed body 53 Second feed motor (drive source)
54 Support Mechanism 90 Control Device H Sewing Product H1 Right End S Contact Area

Claims (5)

A first feed mechanism that feeds the workpiece by a wheel that is disposed obliquely next to the needle entry position;
A feed body that is disposed upstream of the first feed mechanism in the feed direction and that contacts the sewing product at a position eccentric from the rotation center, and feeds the sewing product along an arc around the rotation center. A second feed mechanism for performing
A control device for individually controlling the drive source of the first feed mechanism and the drive source of the second feed mechanism;
A side end detector that detects the position of the side end of the sewing product in a direction that intersects the feed direction of the sewing product at the needle drop position,
The said control apparatus controls the rotational speed of the drive source of a said 2nd feed mechanism according to the position of the side edge part of the said to-be-sewn product which the said side edge detection part detected. An end detection unit that detects the passing of the end of the sewing product in the sewing direction at the needle drop position;
The said control apparatus performs control which complete | finishes sewing with respect to the sewing machine motor used as the drive source of sewing according to passage of the termination | terminus part of the said to-be-sewn product which the said termination | terminus detection part detected. The sewing machine according to 1.   3. The sewing machine according to claim 1, wherein the second feed mechanism feeds by rotating the feed body that is in spherical contact with the workpiece. The second feeding mechanism includes a support shaft that supports the feeding body,
The feed body is connected with the center of rotation fixed to the support shaft,
The sewing machine according to claim 3, wherein the support shaft is disposed obliquely with respect to the needle plate.   The said 2nd feeding mechanism makes the wheel arrange | positioned in the state slanting with respect to the throat plate as the said feed body, rotates the said wheel, and feeds, It is characterized by the above-mentioned. sewing machine.

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