JP4467487B2 - Sewing machine cloth edge cutting device - Google Patents

Description

  The present invention relates to a cloth edge cutting apparatus for a sewing machine, and more particularly to a cloth edge cutting apparatus for a sewing machine for cutting a cloth edge.

  In order to cut the cloth end sewn by the sewing machine, for example, as disclosed in Japanese Patent Application Laid-Open No. 2003-181178, a sewing machine including a cloth edge cutting device has been proposed. According to such a sewing machine, it becomes possible to sequentially sew the cloth end in conjunction with the sewing after the cutting.

  A standard arrangement example of a sewing needle, a rotary hook, and a cloth edge cutting device in a conventional sewing machine with a cloth edge cutting device is shown in FIG. Here, the sewing needle 1 is provided with an edge portion 1a on the right side when viewed from the operator side, and is attached to the tip of a needle bar (not shown) to move up and down. The cloth feeding direction by the cloth feeding device accommodated in the sewing machine frame 2 is the direction of arrow A in the figure. The rotary hook 3 is a vertical rotary hook that is disposed on the right side in the cloth feeding direction L passing through the needle drop position of the sewing needle 1 as viewed from the operator side, and is rotated in the vertical plane. The vertical rotary hook 3 causes the hook sword tip 3 a to enter the right side of the sewing needle 1 in the same direction as the cloth feeding direction A, and captures the loop 4 a of the sewing thread 4 on the right side of the sewing needle 1. The cloth edge cutting device 5 sequentially cuts the cloth edge by the cooperation of a moving knife 5a which is driven to move up and down in synchronization with a sewing operation and a fixed knife 5b which is fixedly attached below the moving knife 5a. Therefore, it is arranged on the right side of the needle drop position of the sewing needle 1 at a position away from the needle drop position by an appropriate distance along the direction opposite to the cloth feed direction A, and the cloths cut at this position are sequentially sewn.

  Another configuration is shown in FIG. The configuration shown in FIG. 2 is a cutting mechanism for a sewing machine with a cloth edge cutting device. This sewing machine is arranged with the edge portion 1a of the needle 1 facing rightward when viewed from the operator side. In addition, the horizontal rotary hook 6 that is driven to rotate clockwise as viewed from above is arranged on the right side of the line L along the cloth feed direction passing through the needle drop position of the needle 1 so that the hook sword tip 6a is moved in the cloth feed direction A. The sewing thread 1 is inserted into the right side of the sewing needle 1 in a direction along the direction, and the sewing thread loop 4a of the sewing thread 4 is captured on the right side of the sewing needle 1. And the cloth edge cutting device 5 is arrange | positioned in the position which left | separated the appropriate distance along the direction opposite to the cloth feed direction A from the needle drop position on the right side of the needle drop position.

  FIG. 3 shows yet another configuration. This cloth edge cutting device is attached to a lockstitch sewing machine. The edge portion 1a of the sewing needle 1 is disposed toward the left side when viewed from the operator side. The rotary hook 7 is arranged on the left side of the cloth feed direction line L passing through the needle drop position of the needle 1 when viewed from the operator side, and is rotated clockwise in the direction of arrow B in the figure when viewed from above. It is a horizontal rotary hook. The horizontal rotary hook 7 causes the needle point 7a to enter the left side of the sewing needle 1 in a direction reverse to the cloth feeding direction A and captures the sewing thread loop 4a of the sewing thread 4 on the left side of the sewing needle 1. The cloth edge cutting device 5 is disposed close to the horizontal rotary hook 7 on the right side of the needle drop position.

  The configuration shown in FIG. 4 is the configuration disclosed in Japanese Patent Application No. 2003-181178 cited at the beginning, and here the cloth edge cutting device is attached to the sewing machine. The edge portion 1a of the sewing needle 1 is arranged on the right side when viewed from the operator side. Further, a horizontal shuttle 8 which is counterclockwise when viewed from above and is rotated in the direction of arrow E in the figure is arranged on the left side of the cloth feed direction line L passing through the needle drop position of the sewing needle 1, and the hook point 8a Is inserted into the right side of the sewing needle 1 in a direction along the cloth feeding direction A, and the loop 4a of the sewing thread 4 is captured on the right side of the sewing needle 1. The cloth edge cutting device 5 is arranged in the vicinity of the horizontal rotary hook 8 on the right side of the needle drop position.

  Such a cloth cutting device 5 is driven by, for example, a knife driving mechanism as shown in FIG. This drive mechanism has a configuration proposed in Japanese Patent Laid-Open No. 2003-181177. Due to the rotational motion of the upper shaft 11 of the sewing machine, the eccentric amount of the eccentric cam 12 fixed to the upper shaft 11 causes the drive rod 13 to generate a peristaltic motion. This movement causes the female drive link 16 to reciprocate up and down via the links 14 and 15. The drive-side cutting knife 17 is reciprocated up and down integrally with the knife drive link 16, and this position is obtained by cooperation with the fixed-side cutting knife 18 fixedly installed at the meshing position by the up-and-down reciprocation. Cut the fabric sent to the.

  The conventional sewing machine with a cloth edge cutting device according to FIGS. 1 and 3 described above, the cloth is fed to the cloth feed direction A because the cloth is fed to the needle drop position after the edge is cut by the cutting device 5. Misalignment tends to occur in the direction. Such misalignment of the cloth edge becomes prominent when the material is thick or when the cloth edge is cut into a curved line, resulting in a sewing failure that results in uneven finish width from the cloth edge to the seam after sewing. Therefore, in order to ensure the quality of the sewing product, there arises a problem that the fabric thickness is limited and the cloth edge shape is limited.

  It is considered that such a problem is solved by the configuration shown in FIG. 3, but the configuration shown in FIG. 3 is the case where a general Z twisted yarn is used as the sewing thread 6 and the hook hole of the hook sword tip 7 a or the needle 1. As a result of the edge squeezing the surface of the yarn in the direction opposite to the twisting direction of the yarn, the sewing thread 4 is likely to be twisted back, and this twisting back causes sewing failure such as thread breakage or yarn stitch disturbance. become.

  The configuration shown in FIG. 4 solves the problems caused by FIGS. 1, 2, and 3, but the rotary hook and its drive mechanism have a dedicated configuration, which causes a new problem in cost. On the other hand, as shown in FIG. 3 or FIG. 4, rotary hooks that are horizontally rotated clockwise or counterclockwise when viewed from above are arranged on the left and right of the needle drop position, respectively, and are orthogonal to the cloth feeding direction. In a two-needle lockstitch sewing machine in which two needles are arranged in the direction and the left and right needles and the shuttle respectively cooperate to form two parallel seams, a cloth end cutting device should be arranged Becomes impossible.

Further, in addition to the above problems, the conventional sewing machine with cloth edge cutting device has to incorporate the cutting knife in the frame of the sewing machine body because it takes the driving means of the cutting knife from the driving system of the sewing machine. Therefore, the cloth end cutting device becomes a dedicated sewing machine incorporated in the sewing machine body, and an economic burden increases for a user who does not need the cutting device.
JP 2003-181178 A JP 2003-181177 A

An object of the present invention is a cloth end cutting device for a sewing machine that can cut a sewing product with a predetermined uniform width from a sewing line, and sets the cutting device in the vicinity of the shuttle regardless of the position of the rotary shuttle. This is a sewing machine cloth edge cutting device that can also cut a sewing product with a uniform width at the same time as sewing even in a two-needle sewing machine in which the rotary hook is arranged on the left and right of the needle drop position. Provided is a cloth edge cutting device for a sewing machine which is a cloth edge cutting device, and the cloth edge cutting device is a unit independent of a sewing machine body, so that the cloth edge cutting device can be detachably attached later. That is.

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In the cloth edge cutting device attached to the sewing machine body, the cloth edge of the sewing material which is arranged inside the sewing needle of the sewing machine head and sent in the direction of the sewing machine needle and finished sewing is cut at the cloth edge cutting operation point. A cloth edge cutting means, and a cloth edge cutting point position adjusting means for adjusting the position of the cloth edge cutting means, wherein the cloth edge cutting means is provided at a rotationally upward position obliquely above the cloth edge cutting operation point. A rotating knife that is arranged on the right side of the needle as viewed from the operator side and tilted to the right so as to approach the needle drop position, and juxtaposed with the rotating knife. It consists of a fixed knife that cuts the cloth edge by movement, and the cloth edge cutting means can adjust the position of the cloth edge cutting operation point in the front / back, up / down and left / right directions with respect to the feed direction of the sewing material Easy cloth edge cutting point position adjustment means Cloth end cutting apparatus attached to the sewing machine body, characterized in that. To solve the above-mentioned problems.

Here, the cloth edge cutting operation point by the fixed knife and the rotary knife may be in the vicinity of the needle drop position of the sewing needle. Moreover, you may provide the position adjustment means which adjusts the action | operation point of a cutting | disconnection. Moreover, you may comprise from the unit which can be attached or detached with respect to a sewing machine main body. Moreover, it has a control means, and this control means may be provided with a switching means for switching between a state in which the cutting operation is interlocked with the sewing operation and a state in which the cutting operation is performed independently.

According to a preferred aspect of the present invention, a rotary knife cloth end cutting means for performing a cloth edge cutting operation in cooperation with a fixed knife without being incorporated in the sewing machine main body is a motor for driving the rotary knife . It is composed of a rotary knife driven by a rotational drive means provided obliquely above and rotating obliquely with respect to the vertical direction, and a fixed knife which is juxtaposed to the rotary knife and cuts the cloth end portion in cooperation. And a control device capable of selecting and controlling the case where the rotary knife is driven synchronously with the sewing operation of the sewing machine and the case where the rotary knife is driven independently, regardless of the structure below the needle plate. This is a cloth edge cutting device capable of setting and arranging cutting points in the vicinity.

  According to such an embodiment, in the case of a main sewing machine, the cutting position can be arranged in the vicinity of the sewing needle regardless of the position of the hook, so that any sewing product shape can be removed from the sewing line while maintaining the sewing quality. The sewn product can be cut with a uniform width, and the quality of the sewn product can be improved. For sewing machines other than the main sewing machine, the cutting position can be placed near the needle regardless of the structure below the needle plate, so that the sewing product can be cut with a uniform width from the sewing line regardless of the shape of the sewing product. This makes it possible to improve the quality of the sewn product.

  Further, according to the above aspect, in the main stitch sewing machine, since the cutting position can be set and arranged near the needle regardless of the position of the hook, the two-needle sewing machine in which the rotary hook is arranged on the left and right of the needle drop position. In this case, the sewn product can be cut with a uniform width from the sewing line simultaneously with the sewing, and the productivity can be improved. In addition, by adding this device to an existing sewing machine later without preparing a dedicated sewing machine with a cloth edge cutting mechanism, it is possible to provide a sewing machine with a cloth edge cutting function, thereby reducing the cost of the sewing machine body. It becomes possible.

This onset bright, in the cloth end cutting apparatus attached to the sewing machine body is disposed inside of the sewing needle of the sewing machine head, is fed in the direction of the sewing machine needle, cutting the fabric edge sewing is finished with a cloth end cutting operating point A cloth edge cutting means, and a cloth edge cutting point position adjusting means for adjusting the position of the cloth edge cutting means, wherein the cloth edge cutting means is provided at a rotational drive obliquely above the cloth edge cutting operation point. The rotary knife driven by the means and rotated obliquely with respect to the vertical direction, and the fixed knife that is juxtaposed with the rotary knife and cuts the cloth end portion in cooperation with each other. Is a cloth edge cutting device attached to the main body of the sewing machine to which the cloth edge cutting point position adjusting means capable of adjusting the position of the cloth edge cutting operation point in a direction transverse to the feeding direction of the sewing material is attached , The following became possible

According to such a cloth edge cutting device for a sewing machine of the present invention, according to the cloth edge cutting device attached to the sewing machine main body, the cloth edge cutting means is provided by the rotational drive means provided obliquely above the cloth edge cutting operation point. Driven and composed of a rotary knife that rotates obliquely with respect to the vertical direction and a fixed knife that is juxtaposed to the rotary knife and cuts the cloth end by cooperation, and is sent to the vicinity of the sewing needle. The end of the sewing material is cut at the cloth edge cutting operation point, and the arrangement of the cloth edge cutting device can be freely set regardless of the structure below the needle plate, and it rotates around the sewing needle. The cloth sewn with the knife can be cut almost simultaneously with the sewing. In addition, the sewing product can be cut uniformly from the sewing line at a predetermined width, and the quality of the sewing product can be improved.
The cloth edge cutting means can adjust the position of the cloth edge cutting operation point back and forth with respect to the feed direction of the sewing material, and can adjust the cloth edge cutting point position up and down according to the thickness of the sewing material. Since the means is used , the sewing product can be cut uniformly from the sewing line at a predetermined width, and the quality of the sewing product can be improved.

The present invention relates to a cloth edge cutting device attached to a sewing machine body, which is disposed inside a sewing needle of a sewing head and is operated to cut a cloth edge of a sewing material which is sent in the direction of the sewing needle and finished sewing. A cloth edge cutting means for cutting at a point, and a cloth edge cutting point position adjusting means for adjusting the position of the cloth edge cutting means, and the cloth edge cutting means is provided obliquely above the cloth edge cutting operating point. A rotating knife that is driven by the rotation driving means and is arranged on the right side of the needle as viewed from the operator side with respect to the vertical direction, and tilts to the right so as to approach the needle drop position. juxtaposed, is composed of a fixed knife for cutting the fabric edge portion by cooperating, in the fabric edge cutting means, the position of the cloth end cutting operating point with respect to the direction of feed of the sewing material, longitudinal, vertical and horizontal adjustable cloth end cutting point position adjusting means in the direction It is attached is a cloth end cutting apparatus attached to the sewing machine body, characterized in.
In the left-right direction, it means that “the cutting point can be adjusted in the left-right direction according to the required finished width from the stitch line (seam) to the cloth edge”. The left-right direction and the horizontal direction described in 0029 have the same meaning. “To provide a cloth end cutting device for a sewing machine capable of cutting a sewing product with a predetermined uniform width from a sewing line (0012). In a main sewing machine, regardless of the position of the hook, the sewing needle Since the cutting position can be arranged in the vicinity, the sewing product can be cut with a uniform width from the sewing line in any shape of the sewing product while maintaining the sewing quality, and the quality of the sewing product can be improved. For sewing machines other than the main sewing machine, the cutting position can be placed near the needle regardless of the structure below the needle plate, so that the sewing product can be cut with a uniform width from the sewing line regardless of the shape of the sewing product. can, it is possible to improve the quality of the sewn product (0020) is a matter that is described in such.
The present invention will be described with reference to the drawings. FIG. 6 shows the overall configuration of the sewing machine with a cloth edge cutting device of the present invention. The sewing machine 21 is placed on a leg base 22, and a cloth end cutting control box 23 is attached to the lower side of the top plate of the leg base 22. The sewing machine further includes a drive motor controller 24 and a power switch 25, and a sewing machine drive pedal 26 is attached to the lower end of the leg base 22. A changeover switch 27 is attached to the cloth edge cutting control box 23, and a knife rotation switch 28 is attached to the upper part of the sewing machine 21.

Thus the sewing machine 21 is on the table surface of the isosceles 22, the sewing machine drive motor controller 24 downward, and sewing machine drive pedal 26 in the lower part are arranged respectively. In addition, a power switch 25 and a cloth edge cutting control box 23 are mounted on the lower part of the footrest 22. In particular, the cloth edge cutting control box 23 is a changeover switch that can be switched between a cutting mode during sewing machine operation and a knife sharpening mode. 27 is mounted, and a knife rotation switch 28 that can be operated in the knife sharpening mode is mounted on the sewing machine 21.

  In FIG. 6, a needle bar 29 is attached to the head portion of the sewing machine 21 so as to be movable up and down, and a cloth end cutting device 20 is arranged so as to be positioned on the right side thereof. The cloth edge cutting means of the cloth edge cutting device 20 is driven by a rotation driving means provided obliquely above the cloth edge cutting operation point, and a rotating knife that rotates obliquely with respect to the vertical direction; A fixed knife that is juxtaposed to the rotary knife and that cuts the cloth edge by cooperation, and performs the action of cutting the edge of the sewing material sent to the vicinity of the sewing needle at the cloth edge cutting operation point. Accordingly, the cloth end is cut in conjunction with the sewing operation by the sewing needle and the rotary hook.

  7 to 9 show details of the sewing head portion. A needle bar 29 is vertically attached to the lower part of the sewing head. A needle holder 29 a is fixed to the lower end portion of the needle bar 29. A presser bar 30 is disposed vertically on the side of the needle bar 29, and a cloth presser 30 a is attached to the tip of the presser bar 30. An upper feed bar 31 is attached to the side of the presser bar 30, and an upper feed 31 a is fixed to the upper feed bar 31. A needle plate 32 is disposed along the moving surface of the sewing product, and a lower feed 33 is attached to the lower side thereof.

It will be described by FIGS. 7-9 cloth end cutting apparatus 2 0 shown in FIG.
The cloth edge cutting means is driven by a rotation driving means provided obliquely above the cloth edge cutting operation point, and is arranged in parallel with a rotating knife 34 that rotates obliquely with respect to the vertical direction, and the rotating knife. It is comprised from the fixed knife 40 which cut | disconnects a cloth edge part by cooperation. The end of the sewing material sent to the vicinity of the sewing needle is cut at the cloth end cutting operation point.
The cutting device 20 includes a rotary knife 34, a knife shaft 35, a drive belt 36, a drive motor 37, and a fixed knife 38. The cloth end cutting device 20 includes stays 39a, 39b, 39c, and a fixing stay 40. The drive motor 37 is attached to a motor mounting base 41, and the rotary knife 34 is attached to a knife moving base 42. The rotating device further includes a raising lever 43, a safety switch 44, a knife sharpening device 45, and a raising lever stop cam 46.

The needle bar 29 to which the needle holder 29a is fixed and the upper feed bar 31 to which the upper feed 31a is fixed are respectively arranged on the head portion of the sewing machine 21 so as to be able to be raised and lowered. A presser bar 30 to which the presser foot 30a is fixed is arranged on the sewing machine 21 so as to be movable up and down. Further, the motor mount 41, the front-rear direction as viewed from the operator side, the vertical direction, the lateral direction position adjustment means for moving the cloth end cutting point is provided on the fixed stay 39a therefor, 39 b, 39c, And 40 are fixed to the head portion of the sewing machine 21. Further, the knife moving base 42 configured to be rotatable with the knife shaft 35 to which the rotary knife 34 is fixed is configured so that the rotary knife 34 can move in the vertical direction and the front-rear direction as viewed from the operator side. 41 is attached. A drive belt 36 is used to transmit the drive of the drive motor 37 to the female shaft 35. Incidentally fixed knife 38 for cutting the sewing material by rotating female 34 cooperation is, that is fixed to the female moving base 42. Solid Teimesu 38 and the cutting point is composed of a rotating knife 34 is, in the vicinity upper surface of the needle plate 32, not shown in the right upper feed 31a, and is fixed to HariTome 29a as viewed from the operator side sewing machine It is comprised so that it can arrange | position to the position which becomes a fixed distance from the needle drop point of a needle | hook.
Further, a claw (not shown) provided on the raising lever 43 is engaged with the raising lever stop cam 46, and in conjunction with this operation, the knife mounting base 42 is configured to move up and down and back and forth when viewed from the operator side. The Further, a safety switch 44 is disposed at a position where a part of the knife mounting base 42 is turned on and off. On the other hand, the knife sharpening device 45 can rotate in the worker direction from the retracted position, and is in a position where the grindstone can contact the rotating knife 34 during sharpening, and is retracted to the retracted position by a spring (not shown).

  Reference numerals 10 </ b> A and B denote a winding transmission mechanism that drives the rotary knife 34 by a drive motor 37 attached to the motor mounting base 41. The belt 36 is stretched between a drive pulley 53 attached to the output shaft of the motor 37 and a driven pulley attached to the shaft of the rotary knife 34. The drive belt 36 is guided by guide pulleys 56 and 57 located in the middle, thereby forming a predetermined transmission path. In order to prevent the drive belt 36 from slackening, the tension pulley 58 is arranged in the middle, and the drive belt 36 is pressed from the side by a roll on the tension lever 59, whereby the drive belt 36 Prevents slack.

  Next, the configuration of the cloth edge cutting device control box 23 will be described. As shown in FIG. 12, this apparatus includes a breaker 47, an adapter 48, and a relay 49, and a changeover switch 27 connected to the relay 49 is switched between a sewing machine drive signal line 50 and a constant output signal line 51. It is like that.

  In the block diagram shown in FIG. 12, the original power is supplied to the adapter 48 via the breaker 47 from the power switch 25 that supplies power to the sewing machine driving motor controller 24. Further, the power converted by the adapter 48 is supplied to the relay 49. On the other hand, these are connected to the fixed contact of the changeover switch 27 so that either the sewing drive output signal (for example, air blow signal) 50 or the constant output signal 51 output from the sewing machine driving motor controller 24 can be selected. The movable contact of the switch 27 is connected to the signal side of the relay 49. A main rotation switch 28 is interposed between the changeover switch 27 of the constant output signal line 51 and the sewing machine driving motor / controller 24. On the other hand, a safety switch 44 is connected between the sewing machine drive motor controller 24 and the relay 49 on the plus side which is commonly used for both signals. The power supplied from the adapter 48 is supplied to the drive motor 37 by timing control via the relay 49 by each signal.

  In the above configuration, by operating the sewing machine driving pedal 26 in FIG. 6, the sewing machine driving motor / controller 24 drives the sewing machine 21 to start sewing work on a sewing product (not shown). At the same time, an output is output from the sewing machine drive motor controller 24 to the sewing machine drive output signal line 50 shown in FIG. At this time, when the changeover switch 27 is switched to the signal line 50 side as shown in FIG. 12, a control signal synchronized with the drive of the sewing machine 21 is supplied to the relay 49. Then, the drive voltage supplied from the power switch 25 to the adapter 48 via the breaker 47 is converted and flows to the relay 49. The electric power supplied from the adapter 48 flows to the drive motor 37 through the sewing machine drive signal line 50 synchronized with the drive of the sewing machine 21. As a result, the drive motor 37 is rotationally driven in synchronization with the drive of the sewing machine 21.

  The rotational force of the drive motor 37 is transmitted to the rotary knife 34 fixed to the knife shaft 35 via the drive belt 36 in FIG. 10, whereby the rotary knife 34 rotates in synchronization with the drive of the sewing machine 21. The sewing product is cut simultaneously with sewing at the cutting point in cooperation with the fixed knife 38.

  On the other hand, when the changeover switch 27 shown in FIG. 12 is always switched to the output signal line 51 side, the rotation command signal flows to the relay 49 when the female rotation switch 28 is turned on regardless of the driving of the sewing machine 21. As a result, the motor 37 is driven by supplying electric power to the drive motor 37 via the breaker 47 and the adapter 48. As a result, the rotary knife 34 is rotated. At this time, the rotating knife 34 can be sharpened by bringing the knife sharpening device 45 into contact with the rotating knife 34 by the return force of the spring.

  Further, by raising the raising lever 43, a cutting point constituted by the rotary knife 34 and the fixed knife 38 attached to the knife moving base 42 is moved to the operator side by a link mechanism (not shown) as shown in FIG. The claw moves from the cutting position to the retracted position above the rear part while moving back and forth and up and down as viewed from above, and a claw (not shown) provided on the raising lever 43 engages with the raising lever stop cam 46 to temporarily move at the cutting position. The fixed state is temporarily fixed to the retreat position. At the same time, the safety switch 44 that is pushed and closed by a part of the knife moving table 42 is converted into an open state. As a result, the signal transmitted to the relay 49 is cut off, and even when the sewing machine drive pedal 26 or the knife rotation switch 28 is operated, no current flows through the drive motor 37 and the rotary knife 34 is not driven.

  10 and 11 show only the cutting device after the cloth end cutting device 20 is detached from the sewing machine 21. FIG. As described above, the cloth edge cutting device according to the present embodiment is independent of the sewing machine 21 and can be added to the existing sewing machine later. Therefore, since the sewing machine 21 and the cutting device can be manufactured separately and combined as necessary, it is not necessary to add unnecessary equipment to the sewing machine that does not require the cutting device.

  Although the present invention has been described above with reference to the illustrated embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea of the present invention. For example, in the above-described embodiment, the belt 36 is used as the conduction means for driving the rotary knife 34. However, the belt 36 may be used instead of the belt 36 for driving. Further, although the fixed knife 38 is disposed on the knife moving table 42 of this cutting device, the fixed knife 38 may be attached to the needle plate 32 or the lower feed 33. Further, the drive motor 37 can be controlled using a sequencer instead of the relay 49 shown in FIG.

  The present invention can be widely used as a cloth edge cutting device in a sewing machine other than a main sewing machine or a sewing machine.

It is a principal part perspective view which shows the conventional cloth edge cutting device. It is a principal part perspective view of another conventional cloth edge cutting device. It is a perspective view of another conventional cloth edge cutting device. It is a perspective view of another conventional cloth edge cutting device. It is a front view of the cutting knife drive mechanism in the conventional cloth edge cutting device. It is a front view which shows the whole structure of the sewing machine of this Embodiment. It is a front view of the part of the sewing machine head of the sewing machine. It is a right view of the sewing machine head portion of the sewing machine. It is a left view of the sewing machine head part of the sewing machine. It is a front view which shows the drive mechanism of the rotary knife in the cutting position and raising position of a cloth end cutting device. It is a rear view of a cloth edge cutting device. It is a block diagram which shows the structure of the control apparatus of an end cutting device.

1 needle 1a edge section 2 sewing machine frame 3 vertical hook 3a hook point 4 thread 4a loop 5 cloth end cutting device 5a moving knife 5b fixed knife 6 horizontal hook 6a hook point 7 horizontal hook 7a hook point 8 horizontal hook 8a hook point 11 upper shaft 12 Eccentric cam 13 Drive rod 14, 15 Link 16 Female drive link 17 Cutting knife 18 Cutting knife (fixed side)
DESCRIPTION OF SYMBOLS 20 Cutting device 21 Sewing machine 22 Foot stand 23 Cloth edge cutting control box 24 Sewing machine drive motor controller 25 Power switch 26 Sewing machine drive pedal 27 Changeover switch 28 Female rotation switch 29 Needle bar 29a Needle clamp 30 Presser bar 30a Work clamp 31 Upper feed bar 31a Upper feed 32 Needle plate 33 Lower feed 34 Rotating knife 35 Female shaft 36 Drive belt 37 Drive motor 38 Fixed knife 39a, 39b, 39c Fixed stay 40 Fixed stay 41 Motor mounting base 42 Female moving table 43 Lift lever 44 Safety switch 45 Female Sharpening device 46 Lift lever stop cam 47 Breaker 48 Adapter 49 Relay 50 Sewing machine drive signal line 51 Constant output signal line 53 Drive pulley 56, 57 Guide pulley 58 Tension pulley 59 Tension lever

Claims (1)

In the cloth edge cutting device attached to the sewing machine body, the cloth edge of the sewing material which is arranged inside the sewing needle of the sewing machine head and sent in the direction of the sewing machine needle and finished sewing is cut at the cloth edge cutting operation point. A cloth edge cutting means, and a cloth edge cutting point position adjusting means for adjusting the position of the cloth edge cutting means, wherein the cloth edge cutting means is provided at a rotationally upward position obliquely above the cloth edge cutting operation point. A rotating knife that is arranged on the right side of the needle as viewed from the operator side and tilted to the right so as to approach the needle drop position, and juxtaposed with the rotating knife. It consists of a fixed knife that cuts the cloth edge by movement, and the cloth edge cutting means can adjust the position of the cloth edge cutting operation point in the front / back, up / down and left / right directions with respect to the feed direction of the sewing material Easy cloth edge cutting point position adjustment means Cloth end cutting apparatus attached to the sewing machine body, characterized in that. "

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