JP2000202179A - Sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily switch seams without requiring intricate mechanisms and delicate adjustment of a sewing machine. SOLUTION: A looper mechanism 42 forms the seams of a chain stitch system by interlocking to a needlebar mechanism 36. A hook mechanism 70 forms the seams of a lock stitch system by interlocking to the needlebar mechanism 36. A controller 73 includes drive means 55, 57 and 58 for respectively driving drive sources 37, 49 and 50 for the needlebar mechanism 36, the looper mechanism 42 and the hook mechanism 70, a synchronous control means 74 for cooperatively activating the plurality of drive means 55, 57 and 58 so as to form the seams and a switching means 64 for switching the seam systems to be formed by acting on the synchronous control means 74, thereby switching the operations of the looper mechanism 42 and the hook mechanism 70.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine suitably used for industrial use.

[0002]

2. Description of the Related Art In the sewing industry, the introduction of automatic sewing machines has been promoted in order to reduce labor costs and stabilize quality.
In general, an automatic sewing machine mainly has a lockstitch or a chain stitch sewing machine, and has a configuration in which peripheral devices are automated.

[0003] However, since the sewing seam depends on the type of the sewing machine main body, the application range of the automatic machine is limited to the type of the seam.

Further, in a general sewing factory, it is necessary to use different stitches according to the use of a sewn product, a fabric material, a sewing process, and the like, and it is necessary to store various sewing machines.

The general arrangement of the sewing machine and the drive unit, the structure of interlocking with the main shaft of the sewing machine, and the operation of the conventional sewing machine will be described with reference to the drawings.

FIG. 21 shows a general arrangement of a lockstitch sewing machine section and a sewing machine driving device, FIG. 22 schematically shows an example of a structure of a lockstitch sewing machine section, and FIG. 23 shows an example of a structure of a chain stitch sewing machine section. FIG.

In FIG. 21, the sewing machine 1 is driven by a motor 5 by a transmission mechanism including a sewing machine pulley 2, a belt 3 and a motor pulley 4.

By operating the pedal 6, the operator can give a command to the control device 9 by the signal of the pedal sensor 8 connected by the connecting rod 7. The control device 9 can drive or stop the sewing machine unit 1 by driving the motor 5 in accordance with the operation of the pedal 6.

The schematic structure of the lockstitch sewing machine will be described with reference to FIG.

The rotation of the sewing machine pulley 2 is transmitted to the needle bar 11 and the balance mechanism 12 by the main shaft 10, and is further used for driving the kama 15 via the connecting shaft 13 and the lower shaft 14. The comb 15 includes a bobbin 17 around which a lower thread 16 is wound. In the case of lockstitch sewing machine, the main spindle 10
The lower shaft 14 makes two rotations during one rotation.

The rotation of the main shaft 10 is converted into a vertical reciprocating movement of the needle bar 11. The needle bar 11 has a sewing needle 1 through which a needle thread 18 is passed.
9 is fixed, and the sewing needle 19 penetrates through the cloth 20 by the vertical movement of the needle bar 11, and guides the upper thread 18 to the kama 15. The upper thread 18 and the lower thread 16 form a seam in the cloth 20 by the cooperation of the operation of the sewing needle 19 and the stitch 15.

A schematic configuration of a chain stitch sewing machine will be described with reference to FIG.

The rotation of the sewing machine pulley 21 drives a looper mechanism 23 via a lower shaft 22. The lower shaft 22 drives the upper shaft 25 via the timing belt 24 at a one-to-one rotation ratio. The rotation of the upper shaft 25 is converted into a vertical reciprocating movement of the needle bar 11. The lower thread 16 is passed through the looper 27 of the looper mechanism 23. The needle bar 11 has a sewing needle 1 through which a needle thread 18 is passed.
9 is fixed, the sewing needle 19 penetrates the cloth 20 by the vertical movement of the needle bar 11, and guides the upper thread 18 to the looper mechanism 23.
By the cooperation of the operation of the sewing needle 19 and the looper 27, the upper thread 1
8 and bobbin thread 16 form a seam in cloth 20.

As described above, the stitch formed when the lower shaft 14 drives the kama 15 can be generally referred to as "final stitch" and formed when the lower shaft 22 drives the looper mechanism 23. The stitch to be performed can be referred to as “ring stitch”.

The operation of each mechanism and its interrelationship are complicated, and many types of stitches are classified, so that detailed description thereof will be omitted.

[0016]

In the known sewing machines described above, the sewing machine generally has a structure in which all the mechanisms are operated by one drive source such as a motor 5.

In order to make full use of the functions of each mechanism, it is necessary to make a movement in which each mechanism has a unique positional relationship, and it is necessary to finely adjust the positional relationship.
Further, a complicated mechanism for adjustment is required.

In other words, since the formation of the seam is determined by the interlocking condition of each mechanism, a mechanism specially configured for each seam is required. In addition, the same chain stitch includes types such as a double chain stitch, a flat stitch, and an overlock stitch, and therefore, a unique mechanism is required for each.

Therefore, if a sewing machine capable of forming different kinds of stitches with the same mechanism can be realized, the range of application of various automatic machines will be widened, and the line knitting and change of a sewing factory will be facilitated, greatly improving productivity. It is clear that we can contribute.

In order to solve this problem, a technique is considered in which the upper shaft for driving the needle bar and the lower shaft for driving the cam or looper are independently driven by separate motors, and their operations are individually controlled and adjusted. Can be Examples of the configuration include JP-A-63-194695 and JP-A-59-186589.
The techniques described in Japanese Patent Application Laid-Open Publication No. Sho 62-97098, Japanese Patent Laid-Open Publication No. Hei 3-92, and the like are known.
However, all of these technologies rotate the upper shaft and the lower shaft in synchronization, and therefore cannot adjust the movement in relation to the unique positional relationship of each mechanism, and therefore, the complicated mechanism and the mechanical Subtle adjustments are still needed.

Further, since a known sewing machine requires complicated movements related to the above-described mechanism-specific positional relations and delicate adjustments for interlocking, one sewing machine can be used for one kind of stitch. Is the mainstream. However, if several types of stitches can be formed with one sewing machine, knitting change in the sewing process can be simplified, and it is clear that the effect is great. As the technique, a technique described in JP-A-56-47787 is known. However, this technique merely configures a mechanism for lockstitching and a mechanism for chain stitching in one sewing machine at the same time, and still requires complicated mechanisms and fine adjustments, and easily switches stitches. Can not.

Accordingly, an object of the present invention is to make it possible to easily switch stitches without requiring a complicated mechanism and fine adjustment.

[0023]

To achieve this object, a sewing machine according to the present invention comprises a needle bar mechanism, a first looper mechanism,
A needle bar mechanism for holding a sewing needle; and a first needle bar for driving the needle bar.
Wherein the first looper mechanism includes a first looper and a second drive source for driving the first looper, and wherein the second looper mechanism includes a second looper mechanism. And a third drive source for driving the second looper, wherein the first and second looper mechanisms are linked to the needle bar mechanism, and one or both looper mechanisms are used to perform a chain stitch method. The control device is configured to form a seam, and the control device associates the first to third driving units that respectively drive the first to third driving sources with a plurality of the driving units so as to form a seam. A synchronous control means, and a switching means for switching the operation of the first and second looper mechanisms by acting on the synchronous control means to switch a stitch method to be formed.

According to the present invention, each function of the sewing machine constituted by a simple mechanism can be independently driven, the operation of each mechanism can be electrically adjusted, and a plurality of stitches can be formed by one sewing machine. You can easily switch.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION A sewing machine according to the present invention comprises a needle bar mechanism,
A first looper mechanism, a second looper mechanism, and a control device, wherein the needle bar mechanism includes a needle bar that holds a sewing needle, and a first drive source that drives the needle bar; The first looper mechanism includes a first looper, and a second drive source that drives the first looper, wherein the second looper mechanism includes:
A second looper and a third drive source for driving the second looper are provided, and the first and second looper mechanisms are operated by one or both looper mechanisms in conjunction with the needle bar mechanism. The control device includes first to third driving means for driving the first to third driving sources, respectively, and a plurality of the driving means for forming a seam. A synchronous control means for linking the means, and a switching means for switching an operation of the first and second looper mechanisms by acting on the synchronous control means to switch a stitch method to be formed. .

Thus, each function of the sewing machine constituted by a simple mechanism can be independently driven, and the stitch type of the chain stitch sewing machine can be switched by an electric signal, so that the range of application to an automatic machine or the like can be improved. There is a spreading effect.

Further, the sewing machine of the present invention includes a needle bar mechanism, a looper mechanism, a cam mechanism, and a control device. The needle bar mechanism drives a needle bar for holding a sewing needle and the needle bar. A first drive source, the looper mechanism includes a looper and a second drive source that drives the looper, and the kama mechanism includes a camera and a third drive source that drives the camera. ,
The looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, and the kama mechanism forms a lock stitch seam in cooperation with the needle bar mechanism. The apparatus includes first to third driving means for driving the first to third driving sources, a synchronization control means for operating a plurality of the driving means in cooperation to form a seam, and the synchronization control means. And switching means for switching the operation of the looper mechanism and the stirrup mechanism to switch the stitch method to be formed.

Thus, each function of the sewing machine constituted by a simple mechanism can be independently driven, and the lockstitch and the chain stitch can be handled by one sewing machine, which has an effect of expanding the application range to an automatic machine and the like. .

The sewing machine of the present invention includes a needle bar mechanism, a looper mechanism, a looper moving mechanism for moving the looper mechanism, a cam mechanism, a cam moving means for moving the cam mechanism, and a control device. The needle bar mechanism includes a needle bar that holds a sewing needle, and a first drive source that drives the needle bar, and the looper mechanism includes a looper and a second drive source that drives the looper. Wherein the kama mechanism comprises a kama and a third drive source for driving the kama, wherein the looper mechanism comprises:
A chain stitch seam is formed in cooperation with the needle bar mechanism, and the kama mechanism is configured to form a lock stitch seam in cooperation with the needle bar mechanism. First to third drive means for driving the first to third drive sources, respectively, and synchronous control means for operating the plurality of drive means in cooperation with each other to form a seam;
Acting on the looper moving mechanism and the kama moving mechanism, the looper mechanism is formed when forming a chain stitch seam, and the kama mechanism is formed with the needle bar mechanism when forming a lock stitch seam. And switching means for switching the operation of the looper mechanism and the stirrup mechanism by acting on the synchronization control means, thereby switching a stitch method to be formed.

This makes it possible to independently drive each function of the sewing machine constituted by a simple mechanism, and even to a sewing machine having a narrow bottom, a single sewing machine can perform lockstitching and chain stitching, and can be applied to an automatic machine or the like. This has the effect of expanding the range.

The sewing machine according to the present invention further comprises a needle bar mechanism, a lower thread mechanism which can be mounted by exchanging a looper mechanism and a kama mechanism,
A control device, wherein the needle bar mechanism includes a needle bar that holds a sewing needle, and a first drive source that drives the needle bar, and the looper mechanism includes a looper and a second drive that drives the looper. The drive mechanism includes a drive and a third drive source that drives the drive, the looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, The kama mechanism is configured to form a lock stitch seam in cooperation with the needle bar mechanism, and the control device includes:
First to third driving means for respectively driving the first to third driving sources; synchronous control means for operating a plurality of the driving means in cooperation with each other so as to form a seam; A switching means for switching the stitch method to be formed by acting on the synchronization control means in response to the looper mechanism or the kama mechanism.

This makes it possible to independently drive each function of the sewing machine constituted by a simple mechanism. Further, even with a sewing machine having a lower thread mechanism such as a tubular sewing machine, lock stitch and ring stitch can be performed by one sewing machine. It can respond and has the effect of expanding the range of application to automatic machines.

Further, the sewing machine of the present invention includes a needle bar mechanism, a looper mechanism, a kama mechanism, and a control device. The needle bar mechanism drives a needle bar for holding a sewing needle and the needle bar. A first drive source, the looper mechanism includes a looper and a second drive source that drives the looper, and the kama mechanism includes a camera and a third drive source that drives the camera. ,
The looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, and the kama mechanism forms a lock stitch seam in cooperation with the needle bar mechanism. The apparatus includes first to third driving means for driving the first to third driving sources, respectively, and the second or third driving means based on a signal representing an operation position of the first driving source. A synchronous control means for operating a plurality of the driving means in cooperation with each other so as to form a seam in cooperation with a source; and a stitch method to be formed is switched by operating the synchronous control means to switch the operation of each mechanism. Switching means.

Thus, not only can each function of the sewing machine constituted by a simple mechanism be independently driven, but also the operation of each mechanism can be electrically adjusted, and a plurality of stitches can be easily switched by one sewing machine. In addition, since all the mechanisms are subordinate to the needle bar, there is an effect that the operation of the sewing machine and the seam can be confirmed by manually moving the needle bar.

Further, the sewing machine of the present invention includes a needle bar mechanism, a looper mechanism, a kama mechanism, and a control device, and the needle bar mechanism drives a needle bar for holding a sewing needle and the needle bar. A first drive source, the looper mechanism includes a looper and a second drive source that drives the looper, and the kama mechanism includes a camera and a third drive source that drives the camera. ,
The looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, and the kama mechanism forms a lock stitch seam in cooperation with the needle bar mechanism. The apparatus includes first to third driving means for driving the first to third driving sources, respectively, and second and third driving means for performing one stroke operation of the first driving source.
By having the operation phase data of the drive source, a synchronous control means for cooperatively operating the plurality of drive means so as to form a seam, and by acting on the synchronous control means to switch the operation of each mechanism, Switching means for switching a stitch method to be formed; setting means capable of changing the operation phase data so as to arbitrarily set the operation position of the second or third drive source with respect to the operation position of the first drive source; Is included.

Thus, not only can each function of the sewing machine constituted by a simple mechanism be independently driven, but also the operation of each mechanism can be electrically adjusted, and a plurality of stitches can be easily switched by one sewing machine. Since the operation phase data can be freely set, there is an effect that the mechanism can be simplified and complicated movement of each mechanism can be realized based on the operation phase data.

Further, the sewing machine of the present invention includes a needle bar mechanism, a looper mechanism, a cam mechanism, and a control device. The needle bar mechanism drives a needle bar for holding a sewing needle and the needle bar. A first drive source, the looper mechanism includes a looper and a second drive source that drives the looper, and the kama mechanism includes a camera and a third drive source that drives the camera. ,
The looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, and the kama mechanism forms a lock stitch seam in cooperation with the needle bar mechanism. The apparatus includes first to third driving means for driving the first to third driving sources, respectively, and second and third driving means for performing one stroke operation of the first driving source.
By having the operation phase data of the drive source, a synchronous control means for cooperatively operating the plurality of drive means so as to form a seam, and by acting on the synchronous control means to switch the operation of each mechanism, A switching means for switching a stitch method to be formed; an operating position of the second or third driving source with respect to an operating position of the first driving source; an operating position of the first driving source and a second or third driving source; Setting means capable of changing the operation phase data so as to move in parallel in the direction of the coordinate axis of the orthogonal coordinate system using the operation position of the source as the coordinate axis.

Thus, not only can each function of the sewing machine constituted by a simple mechanism be independently driven, but also the operation of each mechanism can be electrically adjusted, and a plurality of stitches can be easily switched by one sewing machine. Since the mechanisms having complicated relationships can be individually adjusted, there is an effect that the sewing machine can be easily adjusted.

The sewing machine according to the present invention includes a needle bar mechanism, a looper mechanism, a hook mechanism, and a control device. The needle bar mechanism drives a needle bar for holding a sewing needle. A first drive source, the looper mechanism includes a looper and a second drive source that drives the looper, and the kama mechanism includes a camera and a third drive source that drives the camera. ,
The looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, and the kama mechanism forms a lock stitch seam in cooperation with the needle bar mechanism. The apparatus includes first to third driving means for driving the first to third driving sources, respectively, and second and third driving means for performing one stroke operation of the first driving source.
By having the operation phase data of the drive source, a synchronous control means for cooperatively operating the plurality of drive means so as to form a seam, and by acting on the synchronous control means to switch the operation of each mechanism, Switching means for switching a stitch method to be formed; and changing the operation of the first drive source and the operation of the second or third drive source in response to a change in the actual operation speed of the first drive source. So that they shift at a fixed rate,
Correction means for correcting the operation phase data.

Thus, not only can each function of the sewing machine constituted by a simple mechanism be independently driven, but also the operation of each mechanism can be electrically adjusted, and a plurality of stitches can be easily switched by one sewing machine. Although the behavior of the cloth and the thread greatly changes with the sewing speed, it can be easily corrected simply by shifting the operation phase data.

The sewing machine according to the present invention includes a needle bar mechanism, a looper mechanism, a cam mechanism, and a control device. The needle bar mechanism drives a needle bar for holding a sewing needle and the needle bar. A first drive source, the looper mechanism includes a looper and a second drive source that drives the looper, and the kama mechanism includes a camera and a third drive source that drives the camera. ,
The looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, and the kama mechanism forms a lock stitch seam in cooperation with the needle bar mechanism. The apparatus includes first to third driving means for driving the first to third driving sources, respectively, and second and third driving means for performing one stroke operation of the first driving source.
By having the operation phase data of the drive source, a synchronous control means for cooperatively operating the plurality of drive means so as to form a seam, and by acting on the synchronous control means to switch the operation of each mechanism, Switching means for switching the stitch method to be formed; storage means capable of storing a plurality of sets of the operation phase data; and synchronization control means having the plurality of sets of the operation phase data stored in the storage means. And selecting means for selecting operation phase data to be operated.

Thus, not only can each function of the sewing machine constituted by a simple mechanism be independently driven, but also the operation of each mechanism can be electrically adjusted, and a plurality of stitches can be easily switched by one sewing machine. In addition, by storing the optimum conditions according to the sewn products, the material and thickness of the cloth and thread, the process, etc., and selecting them according to the application, it is possible to respond to multi-product production and automatic machines at sewing factories. It is effective in expanding the range.

Further, the sewing machine of the present invention includes a needle bar mechanism, a looper mechanism, a kama mechanism, and a control device. The needle bar mechanism drives a needle bar for holding a sewing needle and the needle bar. A first drive source, the looper mechanism includes a looper and a second drive source that drives the looper, and the kama mechanism includes a camera and a third drive source that drives the camera. ,
The looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, and the kama mechanism forms a lock stitch seam in cooperation with the needle bar mechanism. The apparatus includes first to third driving means for driving the first to third driving sources, respectively, and second and third driving means for performing one stroke operation of the first driving source.
By having the operation phase data of the drive source, a synchronous control means for cooperatively operating the plurality of drive means so as to form a seam, and by acting on the synchronous control means to switch the operation of each mechanism, Switching means for switching a stitch method to be formed, and increasing or decreasing the speed of the first drive source when an error between the operation phase data and an actual operation phase of the second or third drive source becomes equal to or more than a certain value. And a phase difference limiting means.

Thus, not only can each function of the sewing machine constituted by a simple mechanism be independently driven, but also the operation of each mechanism can be electrically adjusted, and a plurality of stitches can be easily switched by one sewing machine. In addition, since the sewing speed is automatically reduced when any of the mechanisms cannot follow, there is an effect that the sewing machine can be used without being conscious of a change in a sewing product or a thread or a mechanical change in a sewing machine.

Further, the sewing machine of the present invention includes a needle bar mechanism, a looper mechanism, a kama mechanism, and a control device, and the needle bar mechanism drives a needle bar for holding a sewing needle and the needle bar. A first drive source, the looper mechanism includes a looper and a second drive source that drives the looper, and the kama mechanism includes a camera and a third drive source that drives the camera. ,
The looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, and the kama mechanism forms a lock stitch seam in cooperation with the needle bar mechanism. The apparatus includes first to third driving means for driving the first to third driving sources, a synchronization control means for operating a plurality of the driving means in cooperation to form a seam, and the synchronization control means. A switching means for switching the stitch method to be formed by switching the operation of each mechanism by acting on the mechanism, and acting on the synchronizing means when the mechanisms cannot cooperate with each other, thereby switching the plurality of drive sources to the respective mechanisms. And origin return means for returning to the origin position of each mechanism in an order that does not interfere with each other.

Thus, not only can each function of the sewing machine constituted by a simple mechanism be independently driven, but also the operation of each mechanism can be electrically adjusted, and a plurality of stitches can be easily switched with one sewing machine. Even when the sewing machine mechanism is moved while the power is turned off, or when a part of the mechanism is stopped due to an abnormality during sewing, the sewing machine mechanism can be returned without being damaged.

Further, the sewing machine of the present invention includes a needle bar mechanism, a looper mechanism, a kama mechanism, and a control device. The needle bar mechanism drives a needle bar for holding a sewing needle and the needle bar. A first drive source, the looper mechanism includes a looper and a second drive source that drives the looper, and the kama mechanism includes a camera and a third drive source that drives the camera. ,
The looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, and the kama mechanism forms a lock stitch seam in cooperation with the needle bar mechanism. The apparatus includes first to third driving means for driving the first to third driving sources, a synchronization control means for operating a plurality of the driving means in cooperation to form a seam, and the synchronization control means. A switching means for switching a stitch method to be formed by switching the operation of each mechanism by acting on the mechanism, a means for adjusting each mechanism or returning each mechanism to the home position, And a drive source restricting means for reducing the driving force of each drive source at the time of returning to the home position of each mechanism.

As a result, not only can each function of the sewing machine constituted by a simple mechanism be independently driven, but also the operation of each mechanism can be electrically adjusted, and a plurality of stitches can be easily switched by one sewing machine. Since each mechanism can be adjusted and each mechanism can be returned to the origin while the driving force of each motor is reduced to the minimum, there is an effect that these operations can be performed safely.

Also, the sewing machine of the present invention includes a needle bar mechanism, a looper mechanism, a kama mechanism, and a control device. The needle bar mechanism drives a needle bar for holding a sewing needle and the needle bar. A first drive source, the looper mechanism includes a looper and a second drive source that drives the looper, and the kama mechanism includes a camera and a third drive source that drives the camera. ,
The looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, and the kama mechanism forms a lock stitch seam in cooperation with the needle bar mechanism. The apparatus includes first to third driving means for driving the first to third driving sources, respectively, and second and third driving means for performing one stroke operation of the first driving source.
By having the operation phase data of the drive source, a synchronous control means for cooperatively operating the plurality of drive means so as to form a seam, and by acting on the synchronous control means to switch the operation of each mechanism, Switching means for switching a stitch method to be formed; current detection means for monitoring the current of each of the drive sources; and current detection means for detecting a current equal to or greater than a predetermined value for the second and third drive sources; Phase difference correction means for stopping the first drive source or driving the first drive source in the reverse direction until the error disappears when the error between the actual operation of the second and third drive sources and the operation phase data reaches a certain value or more. Is included.

Thus, not only can each function of the sewing machine constituted by a simple mechanism be independently driven, but also the operation of each mechanism can be electrically adjusted, and a plurality of stitches can be easily switched by one sewing machine. Even when some of the mechanisms are stopped due to an abnormality during sewing, the sewing machine is stopped while maintaining the positional relationship between the mechanisms, so that sewing can be resumed without damaging the sewn product.

Further, the sewing machine of the present invention includes a needle bar mechanism, a lower thread mechanism, and a control device, wherein the lower thread mechanism includes a looper mechanism and a claw mechanism, and the needle bar mechanism includes a sewing needle. A needle bar for holding the needle bar; a first drive source for driving the needle bar; the looper mechanism includes a looper and a second drive source for driving the looper; A third drive source for driving the stirrer, wherein the looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, and the stirrer mechanism forms a book stitch in cooperation with the needle bar mechanism. The control device includes first to third driving means for driving the first to third driving sources, respectively, and a plurality of the driving means for forming a seam. Control means for cooperating with each other, and this synchronization control means A switching means for switching a stitch method to be formed by acting to switch the operation of each mechanism, wherein the needle bar mechanism and the lower thread mechanism are supported by a mechanical structure constituting the control device. It is as if it were.

Thus, not only can each function of the sewing machine constituted by a simple mechanism be independently driven, but also the operation of each mechanism can be electrically adjusted, and a plurality of stitches can be easily switched by one sewing machine. Since there is no movable mechanism between the upper mechanism and the bottom mechanism, the control device can be housed and the whole sewing machine can be simplified.

Also, the sewing machine of the present invention includes a needle bar mechanism, a lower thread mechanism, and a controller, and the needle bar mechanism and the lower thread mechanism are supported by a mechanical structure constituting the controller. The lower thread mechanism includes a looper mechanism and a claw mechanism, and the needle bar mechanism includes a needle bar that holds a sewing needle,
A first drive source for driving the needle bar, and a second drive mechanism for moving the needle bar mechanism with respect to the mechanical structure of the control device so as to change the distance between the lower thread mechanism and the needle bar mechanism. Wherein the looper mechanism includes a looper and a third drive source for driving the looper, and the cam mechanism includes a camera and a fourth drive source for driving the camera. The mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, and the kama mechanism forms a lock stitch seam in cooperation with the needle bar mechanism. A first to a fourth driving means for respectively driving the first to the fourth driving sources, a synchronous control means for operating a plurality of the driving means in cooperation with each other so as to form a seam; To switch the operation of each mechanism A switching means for switching a stitch method to be formed, and a second drive means for causing the needle bar mechanism to approach the lower thread mechanism at the time of sewing operation, and the needle bar mechanism at times other than at the time of sewing operation. And means for operating the second drive source so as to move the second drive source away from the lower thread mechanism.

Thus, not only can each function of the sewing machine constituted by a simple mechanism be independently driven, but also the operation of each mechanism can be electrically adjusted, and a plurality of stitches can be easily switched by one sewing machine. While keeping the space for taking out the cloth wide, minimizing the vertical movement of the needle,
Therefore, the vibration of the sewing machine can be reduced, and the output of the drive motor can be reduced.

Also, the sewing machine of the present invention includes a needle bar mechanism, a lower thread mechanism, and a controller, and the needle bar mechanism and the lower thread mechanism are supported by a mechanical structure constituting the controller. The lower thread mechanism includes a looper mechanism and a claw mechanism, and the needle bar mechanism includes a needle bar that holds a sewing needle,
By moving the needle bar mechanism with respect to a mechanical structure of the control mechanism, the first drive source for driving the needle bar can be used to change the needle bar mechanism to one of the looper mechanism and the kama mechanism. A second drive source associated with one of the first and second drive sources, the looper mechanism includes a looper and a third drive source for driving the looper, and the kama mechanism includes a camera and a fourth drive for driving the camera. The looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, and the kama mechanism forms a lock stitch seam in cooperation with the needle bar mechanism. Wherein the control device includes first to fourth driving means for driving the first to fourth driving sources, respectively, and a synchronous control means for operating the plurality of driving means in cooperation to form a seam. Act on this synchronization control means Wherein is obtained to include the said act on the second driving means by operating the second drive source, switching means for switching the stitch method that forms switches the operation of each mechanism.

Thus, not only can each function of the sewing machine constituted by a simple mechanism be independently driven, but also the operation of each mechanism can be electrically adjusted, and a plurality of stitches can be easily switched by one sewing machine. The stitching method can be easily switched even with a sewing machine having a narrow bottom.

The sewing machine of the present invention includes a needle bar mechanism, a lower thread mechanism, and a control device. The needle bar mechanism and the lower position mechanism are provided at positions facing each other, and the lower thread mechanism is , A looper mechanism and a kama mechanism, wherein the needle bar mechanism comprises:
A needle bar for holding a sewing needle, and a first drive source for driving the needle bar; the looper mechanism includes a looper and a second drive source for driving the looper; A loop and a third drive source for driving the loop; the looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism; and the loop mechanism is connected to the needle bar mechanism. The control device is configured to form a lock stitch seam in cooperation with the first to third drive units that respectively drive the first to third drive sources, and a plurality of stitches to form a stitch. The needle bar mechanism and the bobbin thread mechanism, comprising: a synchronous control means for operating the driving means in cooperation with each other; and a switching means for switching an operation of each mechanism by acting on the synchronous control means to switch a stitch method to be formed. Configures the control device. The needle bar mechanism is rotatable in a direction not facing the bobbin thread mechanism, and cooperates with the bobbin thread mechanism during the sewing operation. It is configured to be fixable to a position.

As a result, not only can each function of the sewing machine constituted by a simple mechanism be independently driven, but also the operation of each mechanism can be electrically adjusted, and a plurality of stitches can be easily switched with one sewing machine. In addition, the needle bar mechanism is rotatable in a direction not opposed to the lower thread mechanism, and can be fixed to a position cooperating with the lower thread mechanism during the sewing operation. It has the effect of easily exchanging and threading the cloth and widening the space for taking out the cloth.

The sewing machine according to the present invention includes a needle bar mechanism, a lower thread mechanism, and a control device. The needle bar mechanism and the lower position mechanism are provided at positions facing each other. , A looper mechanism and a kama mechanism, wherein the needle bar mechanism comprises:
A needle bar for holding a sewing needle, and a first drive source for driving the needle bar; the looper mechanism includes a looper and a second drive source for driving the looper; A loop and a third drive source for driving the loop; the looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism; and the loop mechanism is connected to the needle bar mechanism. The control device is configured to form a lock stitch seam in cooperation with the first to third drive units that respectively drive the first to third drive sources, and a plurality of stitches to form a stitch. The needle bar mechanism and the bobbin thread mechanism, comprising: a synchronous control means for operating the driving means in cooperation with each other; and a switching means for switching an operation of each mechanism by acting on the synchronous control means to switch a stitch method to be formed. Configures the control device. The lower thread mechanism is rotatable in a direction not facing the needle bar mechanism, and cooperates with the needle bar mechanism during sewing operation. It is configured to be fixable to a position.

As a result, not only can each function of the sewing machine constituted by a simple mechanism be independently driven, but also the operation of each mechanism can be electrically adjusted, and a plurality of stitches can be easily switched by one sewing machine. In addition, the lower thread mechanism is rotatable in a direction not facing the needle bar mechanism, and can be fixed to a position cooperating with the needle bar mechanism during the sewing operation. There is an effect that replacement, threading of a looper thread, cleaning, and the like can be easily performed.

(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
FIG. 2 is a block diagram of a sewing machine according to an embodiment of the present invention, and FIG.
1 shows a general arrangement of a sewing machine unit and a driving device in the sewing machine of FIG. FIG. 3 is a diagram showing a needle bar mechanism, each looper mechanism, a thread reeling mechanism, and a cloth feed mechanism, and the configuration of each motor that drives them. 4 and 5 show operation phase data representing the operation position of each motor. FIG. 6 is a diagram showing a seam forming process of the overcast stitch, and FIG. 7 is a diagram showing a seam forming process of the double chain stitch.

With reference to FIGS. 1 to 7, the arrangement and operation of the sewing machine and the drive unit will be described.

In FIG. 2, a sewing machine section 32 is mounted on a sewing machine table 33. Below the sewing machine table 33, a pedal 6 operated by an operator, and a pedal sensor 8 which detects the movement of the pedal 6 and converts the movement into an electric signal are provided. Is arranged. The control device 34 is arranged at the lower right of the table 33 so as not to disturb the operator. 20 is a sewing cloth.

In FIG. 3, the sewing machine 32 has a sewing needle 19, a needle bar 36 for holding the sewing needle 19, a motor 37 for driving the needle bar 36, and a motor 37 above the cloth 20 to be sewn. A crank mechanism 38 for converting the rotational movement of the needle bar 36 into a vertical reciprocating movement of the needle bar 36, an upper thread winding mechanism 39 for feeding out the upper thread 18 by a required amount, and pulling back to tighten the seam when forming the seam, and driving the upper thread winding mechanism 39 Motor 40 is provided.

The looper 41 is provided below the sewing cloth 20.
, A looper mechanism 44 including a looper 43, a looper thread feeding mechanism 46 for feeding a required amount of looper thread 45, a looper thread feeding mechanism 48 for feeding a required amount of looper thread 47, and a motor 49 for driving the looper mechanism 42. When,
A motor 50 for driving the looper mechanism 44; a motor 51 for driving the looper threading mechanism 46;
8 is provided.

Further, a cloth feed mechanism 53 for feeding the cloth 20 to be sewn for each stitch at the time of seam formation, and a cloth feed mechanism 5
3 is provided.

In FIG. 1, the control device 34 is a motor 3
7, a driving unit 55 for driving the motor 40, a driving unit 57 for driving the motor 49,
Driving means 58 for driving the motor 50, driving means 59 for driving the motor 51, driving means 60 for driving the motor 52, and driving means 61 for driving the motor 54,
While monitoring the sensor signal SE of each motor indicated by the dotted line, the speed and position of each motor are controlled and driven. Each driving means 55
To 61 receive commands from the synchronization control means 62, respectively.

The electric signal Pd from the pedal sensor 8 is inputted to the command means 63, and a command such as a stop of the driving of the sewing machine is outputted from the command means 63 to the synchronization control means 62 in accordance with the electric signal Pd. The switching means 64 selects the operation phase data 65 or the operation phase data 66 of the synchronization control means 62.

The operation of the sewing machine according to the first embodiment configured as described above will be described below.

In FIG. 2, the operator operates the pedal 6, and the movement of the pedal 6 is detected by the pedal sensor 8 as an electric signal P.
It is transmitted to the control device 34 as d. In FIG. 1, in the control device 34, an electric signal Pd is input to a command means 63, and the command means 63 converts the electric signal Pd into operation commands for the sewing machine.

For example, a signal when the pedal 6 is depressed gives a command to the sewing machine 32 to start sewing.
The depressed amount means the operation speed of the sewing machine 32.
When the pedal 6 is depressed again, the signal is transmitted to the sewing machine 3.
2 is instructed such as a thread cutting operation. However, since it is not directly related to the present invention, illustration and description of the thread cutting mechanism and its operation are omitted. The signal when the pedal 6 is set to the neutral state instructs the sewing machine unit 32 to stop. The commanding means 63 slows down the feed operation of the cloth 20 with respect to the operation of the needle bar 36 during sewing to make the seam finer, increases the feed operation of the cloth 20 to make the seam coarser,
There is also a command to reverse the feed operation to make a reverse seam. The commanding unit 63 may instruct to rotate the cloth feeding motor 54 alone.

The synchronization control means 62 selects a command relating to the sewing function of the sewing machine 32 and selects one of the driving means 55 to 61.
Command. In other words, the synchronization control means 62 receives the sewing start command from the command means 63 and
The motors 37 to 54 are rotated or stopped by the steps 61 to 61.

At this time, the relationship between the operating phases of the motors 37 to 54 is shown in FIG. 4 showing an example of the operating phase data 65 based on the operating phase data 65 or 66, and FIG. Shown in Operating phase data 6
The switching unit 64 selects which of the data 5 and the operation phase data 66 is based on the data. Here, when the operation phase data 65 of FIG. 4 is selected, the looper 41 and the looper 43 are selected.
Is formed, and when the operation phase data 66 of FIG. 5 is selected, the double loop stitch is formed by the looper 41. The synchronization control means 62 commands the positions of the motors 37 to 54 to the drive means 55 to 61 in accordance with the signal from the command means 63 to drive the sewing machine 32.

Next, based on FIGS. 3, 4 and 6, the formation of the overlock stitch will be described.

The horizontal axis of the operation phase data shown in FIG. 4 represents the rotational position of the motor 37 for driving the needle bar 36, and 0 degrees indicates the needle bar 36.
, Approximately 180 degrees corresponds to approximately the bottom dead center of the needle bar 36, and further reaches 360 degrees, reaches the top dead center and returns to 0 degrees.

The vertical axis indicates each subordinate motor 4 except the motor 37.
0 to 54 rotation positions.

Curve A shows the rotational position of the motor 40 for driving the needle thread reeling mechanism 39. If the motor 40 is set at 0 degree when the motor 37 is at 0 degree, this motor 40
Rotates and the sewing needle 19 descends from the top dead center,
The upper thread 18 is fed out to the point B by the forward rotation. Motor 40
As the sewing needle 19 rises from the bottom dead center, the sewing needle 19 is pulled back to the point C by the reverse rotation to tighten the seam. The angle difference from 0 degree to the point C on the vertical axis corresponds to the length of the upper thread 18 used for one stitch. At the next stitch, motor 40 rotates along curve A 'to point C'. Hereinafter, similarly, the upper thread 18 is continuously fed out by a necessary length.

Motor 5 for driving looper thread reeling mechanism 46
1 and a motor 52 for driving the looper threading mechanism 48,
Similarly, the looper threads 45 and 47 are paid out as the loopers 41 and 43 move forward, and are pulled back as the loopers 41 and 43 move backward. As a result, the threads 45 and 47 are supplied in a necessary amount for the seam.

A motor 49 for driving the looper mechanism 42;
The motor 50 that drives the looper mechanism 44 is such that the looper 41 and the looper 43 are at the most retracted position at 0 degree, the looper 41 and the looper 43 are at the most advanced position at 180 degree, and further, at 360 degree, The looper 43 is rotated to the most retracted position and returns to 0 degrees.

FIG. 6 shows the seam forming process of the overcast stitching.
This will be described with reference to (a) to (f). (A) The loop 18a of the upper thread 18 is formed when the position of the sewing needle 19 is slightly raised from the lowermost point by the upward movement. The loopers 41 and 43 each start a forward movement. 4
5 and 47 are looper threads and 20 is a sewing cloth. (B) The looper 41 moves forward, and the loop 18 of the upper thread 18 is moved.
hook a. (C) The cloth feed mechanism 53 (FIG. 3) operates to feed the cloth 20
6 is given. The sewing needle 19 continues to rise. Each of the loopers 41 and 43 continues to advance, and the looper 43 catches the looper thread 45 during the movement. (D) The sewing needle 19 starts to descend from the top dead center, and at the same time, the loopers 41 and 43 start to retreat. At this time, the needle 19 descends while hooking the thread 47 of the looper 43. (E) The sewing needle 19 continues to descend further. Looper 41,
Both 43 continue the retreating motion, and the looper 43 removes the thread 47 of the looper 41 hanging. Further, the looper 41 retreats by removing the upper thread 18 hanging on the looper 41. (F) The sewing needle 19 becomes a bottom dead center. The loopers 41 and 43 are both most retracted, and are located farthest from the sewing needle 19 respectively. Returning to (a), the next stitch is formed by repeating the process up to (f).

The sewing needle 19 and the loopers 41, 4
The relationship between the rotation angles of the motors 37 to 54 for realizing the operation with No. 3 is as follows.

As shown at point (a) in FIG. 4, the curve showing the position of the motor 49 for driving the looper mechanism 42 is
6 is at a position of 180 degrees, that is,
As shown in FIG. 6A, the looper 41 is in the most retracted position at the position where the needle bar 36 has slightly risen from the bottom dead center, that is, the position where the rotation angle of the motor 49 is near 0 degrees. The curve indicating the position of the motor 50 that drives the looper mechanism 44 also indicates that the motor 37 is slightly past 180 degrees and the looper 43 is most retracted, that is, the motor 50 is near 0 degrees. .

At the same time as the motor 37 rotates and the needle bar 36 rises, the loopers 41 and 43 also move forward. That is, the motors 49 and 50 rotate simultaneously. Motor 37 is about 24
At point (b) of 0 degree and the motor 49 of 90 degree, the looper 45 hooks the upper thread 29 of the sewing needle 30 as shown in FIG. The motor 37 is about 320 degrees and the motor 50 is about 1
At a point (c) of 40 degrees, as shown in FIG.
3 hooks the looper thread 45. (D) The motor 37 at the point
Returns to 0 degrees, and the sewing needle 19 starts to descend as shown in FIG. The motor 37 is about 90 degrees and the motor 49 is about 2
At the 70 degree (e) point, the thread hanging on each looper is removed as shown in FIG. 6 (e), and the motor 37 returns to the 180 degree (f) point as shown in FIG. 6 (f). Return.

Next, the stitch formation of the double chain stitch will be described with reference to FIGS.

In FIG. 5, similarly to FIG. 4, the horizontal axis represents the rotational position of the motor 37 for driving the needle bar 36. 0 degree corresponds to almost the top dead center of the needle bar 36, and 180 degrees corresponds to the needle bar 36. The bottom dead center corresponds to the top dead center, and reaches the top dead center at 360 degrees and returns to 0 degrees.
The vertical axis indicates the rotational position of each of the subordinate motors 40 to 54 excluding the motor 37.

The stitch forming process of the double chain stitch shown in FIG. 7 is as follows. (A) The sewing needle 19 is at the lowest point, and the looper 41 is at the most retracted position away from the sewing needle 19. (B) A loop 18a of the upper thread 18 is formed where the sewing needle 19 is slightly raised by the upward movement. The looper 41 starts the forward movement, and hooks the upper thread 18 using the loop 18a. (C) The cloth 20 is fed. The looper 41 continues the forward movement, and performs the needle avoiding movement 27 at the most advanced position. The sewing needle 19 is located at the top dead center. (D) Simultaneously with the lowering of the sewing needle 19, the looper 41 starts the retreating movement 28, and at this time, the looper thread 45 as the lower thread, the loop 18a of the upper thread 18 hooked on the looper 41, and the looper 41 itself. Needle 19 enters the triangle created by. (E) As the sewing needle 19 fully enters the triangle and approaches the lowermost point, the looper 41 also continues to retreat, and the upper thread loop 18a of the previous stitch comes off the looper 41. The looper 41 is at the most retracted position. After (f), (a) to (e) are repeated. Here, as in (a) and (b), the sewing needle 19 is raised to form the upper thread loop 18a, and the looper 41 hangs the upper thread 18.

The positional relationship between the motors 37 to 54 for realizing the operation of the sewing needle 19 and the looper 41 described above is as follows.

In forming a double chain stitch, only one looper 41 is driven, and the other looper 43 is not used. For this reason, in FIG. 5, the motors 50 and 52 for the looper 43 remain stopped, and their lines remain at 0 degrees. In this state, the looper 43 is at the most retracted position and does not interfere with the movement of the looper 41.
At a point (a), a motor 49 for driving the looper 41 is provided.
The curve indicating the position of the arrow indicates that the motor 37 for driving the needle bar 36 is at a position of 180 degrees, that is, the position where the needle bar 36 is slightly raised from the bottom dead center shown at the point (a) in FIG. This indicates that the rotation angle of the motor 49 is near 0 degrees. As the motor 37 rotates and the needle bar 36 rises, the motor 49 rotates to move the looper 41 forward. Motor 37 is about 210 degrees, motor 4
At a point (b) where 9 is at a position of 30 degrees, the looper 41 hooks the upper thread 18 of the sewing needle 19 as shown in FIG. At a point (c) where the motor 37 is at a position of about 360 degrees and the motor 49 is at a position of about 180 degrees, the looper 41 performs the needle avoiding movement 27 shown in FIG. The needle avoiding movement 27 can be performed mechanically, but the details thereof are complicated, and the description is omitted.

Next, the motor 37 returns to 0 degree and the sewing needle 19
Begins to descend. At a point (d) where the motor 37 is about 90 degrees and the motor 49 is about 210 degrees, the sewing needle 30 is attached to the loop of the upper thread 29 and the looper thread 45 on the looper 41 as shown in FIG. enter. The motor 37 is about 150 degrees,
At a point (e) where the motor c is at about 300 degrees, the loop 18a of the upper thread 18 comes off the looper 41 as shown in FIG. The motor 37 returns to the original position at the point (f) at which the rotation of the motor 37 becomes 180 degrees.

In FIGS. 4 and 5, the dotted line indicating the rotational position of the motor 54 for driving the cloth feed mechanism 53
Is removed from the cloth 20, that is, only when the rotation angle of the motor 37 is between 300 degrees and 60 degrees.
4 operates.

As described above, in the sewing machine according to the first embodiment, when the operation phase data 65 is selected by the switching means 64, the overlock sewing is performed, and when the operation phase data 66 is selected, the double loop sewing is performed. The sewing can be performed, and the sewing method can be switched without changing the mechanical structure.

Here, the needle avoiding movement 27 is mechanically performed, but a special motor for the needle avoiding movement may be added, and the needle avoiding mechanism may be driven by the additional motor.

Here, the movement of the needle bar mechanism is controlled by the crank mechanism 3.
8 and the motor 37, the needle bar mechanism may be directly driven by a linear motor.

Here, the movements of the loopers 41 and 43 are performed by the looper mechanisms 42 and 44 and the motors 49 and 50. However, the loopers 41 and 43 may be directly driven by linear motors.

The operation phase data shown in FIGS. 4 and 5 is an example, and a seam forming method using another combination may be used.

Although the arrangement in which the loopers 41 and 43 are opposed to each other is adopted here, the arrangement at another angle around the sewing needle 19 may be adopted.

Here, only the looper arrangements relating to the two kinds of sewing methods, ie, the overlock sewing and the double chain sewing, are shown.
Other looper arrangements, such as a flat stitch or a double chain stitch looper arrangement in which the looper moves above the cloth, may be used.

Although only two types of stitches are switched here, any type of stitches may be switched.

As shown in FIG. 3, the cloth feeding mechanism 53 has a structure in which the cloth is fed while pressing the cloth with a rotating disk. Other structures such as a differential feed structure driven by another motor may be used. By the synchronization control means 62,
It is also possible to operate the cloth feeding mechanism 53 independently without cooperating with other mechanisms.

(Second Embodiment) FIG. 8 is a block diagram of a sewing machine according to a second embodiment of the present invention.
FIG. 9 is a diagram showing a configuration of a needle bar mechanism, a looper mechanism, a kama mechanism, a cloth feeding mechanism, and respective motors for driving them in FIG. 8, and FIG. FIG. FIG. 11 shows operation phase data indicating the operation position of each motor in the formation of the stitches of the lockstitch. FIG. 12 is a diagram showing a stitch forming process of the lockstitch.

The construction and operation of the sewing machine and the drive device according to the second embodiment of the present invention will be described below with reference to FIGS.

With respect to the configuration of the second embodiment, the first
The difference from this embodiment is that the looper mechanism 44 is replaced by a cam mechanism 70, the looper thread reeling mechanism 48 is omitted, and the control device 73 eliminates the driving means 60 for the motor 52 that drives the looper thread reeling mechanism 48, and the synchronization is achieved. The control means 74 is provided with operation phase data 66 for double chain stitching and operation phase data 71 for final stitching.

As shown in FIG. 9, the looper 41
It is arranged so as to be orthogonal to the needle hole of the sewing needle 19 through which 8 passes. Comb mechanism 70 driven by motor 50
The rotary shaft 69 of the kama is arranged in parallel with the direction of the needle hole, and the needle 18 of the sewing needle 19 is arranged on the side passing through the needle hole.

As shown in detail in FIG.
Are a bobbin 17 in which the bobbin thread 16 has been wound in advance, a bobbin case 75 for holding the bobbin 17, a bobbin case 7
5 which holds the motor 5 and is connected to the shaft of the motor 50
5 is provided.

Although the illustration of the bobbin case 75 is omitted,
A mechanism for adjusting the tension when pulling out the lower thread 16 is provided. Further, the bobbin case 75 needs to be stationary even when the claw 15 rotates, and therefore has a projection 76 called a kamadome, and can be rotated by a detent 77 having a gap enough for the upper thread 18 to pass through. Limited. Kama 15
Is provided with a protruding kama sword tip 31 for hooking the upper thread 18 coming out of the sewing needle 19.

In FIG. 8, the operation phase data includes
The operation phase data 66 for double chain stitching shown in FIG. 5 similar to the first embodiment and the operation phase data 71 for lockstitching shown in FIG. 11 are provided.
71 is switched by the switching means 64.

The other structure of the second embodiment is the same as that of the first embodiment.

The operation of the second embodiment configured as described above will be described below.

The operation when the switching means 64 selects the operation data 71 for lockstitching in FIG. 11 is different from that in the first embodiment.

As shown in FIG. 12, the process of forming the seam of the lock stitch is as follows. (A) The sewing needle 19 descends toward the cloth 20. Kama sword tip 31 comes almost downward. (B) At the lowest point of the needle 19, the kama sword tip 31 is
At about 50 ° before (C) The sewing needle 19 is raised by about 2 mm from the lowest point. The sword tip 31 meets the sewing needle 19 and starts capturing the upper thread 18. (D) The sewing needle 19 continues to rise, and the sword tip 31 passes through the lowest point. The upper thread 18 is drawn up to the maximum. (E) At the highest point of the needle 19, the sword tip 31 comes to a position about 50 ° before the needle center line. The upper thread 18 is pulled up and comes out of the blade point 31. (F) The sewing needle 19 is slightly lowered from the uppermost point. Kama 15
Enters the second rotation (idling). At this time, when the balance (not shown) reaches the uppermost point, the upper thread 18 is completely pulled up, and a seam is formed as shown in the figure.

The positional relationship between the motors for realizing the operation of the sewing needle 19 and the stirrer 15 described above is as follows.

In FIG. 11, the line indicating the rotational position of the motor 50 for driving the stitch mechanism 70 is set to 0 degree at the highest point where the sewing needle 19 and the stylus tip 15 meet, and the motor 37 for driving the sewing needle 19 is set at 1 degree. This indicates that two rotations are made during rotation. That is, the line indicating the rotational position of the motor 50 passes through 0 degree twice when the motor 37 is at about 20 degrees and when it is at about 200 degrees.

The point (a) in FIG. 11 is a position where the sewing needle 19 pierces the cloth 20 and the stitch point 31 is almost at the lowest point as shown in FIG.
00 degrees, the motor 50 is at an angle of about 180 degrees. (B)
As shown in FIG. 12 (b), the sewing needle 19 is located at the lowest point, and
At the position where the angle is 0 °, the motor 37 is set at 180 degrees and the motor 50 is set at
Is an angle of about 310 degrees. The point (c) corresponds to FIG.
The sewing needle 19 rises by about 2 mm from the lowermost point as shown in FIG.
, The motor 37 is at an angle of about 200 degrees, and the motor 50 is at an angle of 360 degrees, that is, 0 degrees. The point (d) is a position where the sewing needle 19 continues to rise and the stitch point 31 passes through the lowermost point as shown in FIG. 12 (d), and the motor 37 is about 280 degrees and the motor 50 is about 180 degrees. Angle. The point (e) is the uppermost point of the sewing needle 19 as shown in FIG.
°, the motor 37 is 360 degrees, ie 0 degrees,
The motor 50 is at an angle of about 310 degrees. (F) The point is
As shown in FIG. 12 (f), at the position where the sewing needle 19 is slightly lowered from the uppermost point and the stirrer 15 enters the second rotation, the motor 37 is at about 20 degrees, and the motor 50 is at an angle of 360 degrees, that is, 0 degree. Become.

In FIG. 11, the operation diagram of the motor 49 for driving the looper mechanism 42 and the motor 51 for driving the looper thread reeling mechanism 46 remains at 0 degree, and the looper 41 is at the most retracted position. Indicates that you are waiting.

As described above, in the sewing machine according to the second embodiment, double chain stitching is performed when the operation phase data 66 is selected by the switching means 64, and lock stitching is performed when the operation phase data 71 is selected. The sewing method can be changed without changing the mechanical structure.

(Third Embodiment) FIG. 13 is a block diagram of a sewing machine according to a third embodiment of the present invention.
FIG. 14 illustrates a needle bar mechanism, a looper mechanism,
It is a figure which shows the structure of a camera mechanism, each motor which drives them, a looper moving mechanism, and a camera moving mechanism.

The structure of the sewing machine according to the third embodiment is as follows.
The looper moving mechanism 80 is provided in the sewing machine according to the second embodiment.
The control device 82 includes a driving unit 83 and a driving unit 84. The switching unit 85 includes an operation phase data 66 for double chain stitching, an operation phase data 71 for lockstitching, Is different from that of the second embodiment in the point that a command is given to the driving means 83 and 84 and the like.

The looper moving mechanism 80 has a rail 86 fixed to the sewing machine main body, and a moving table 87 that moves along the rail 86 when driven by a motor 88. A motor 49 is attached. In detail, the moving table 87 can move in the direction of movement of the looper 41 along the rail 86, and the movement of the moving table 87 causes the looper 41 to move between the engaged position of the looper 41 and the sewing needle 19 and the standby position. Can be moved between.
The motor 88 is driven by driving means 83 of the control device 82.

The kama moving mechanism 81 has a rail 90 fixed to the sewing machine main body, and a moving table 91 which moves along the rail 90 when driven by a motor 92.
1 is provided with a rotation stop of the baffle mechanism 70 and the motor 50. In detail, the movable table 91 can be moved in the axial direction of the motor 50, and the movement of the movable table 91 can move the kama mechanism 70 between the engagement position of the kama and the sewing needle 19 and the standby position. it can. The motor 92 is driven by driving means 84 of the control device 82.

The operation of the third embodiment configured as described above will be described below.

As described above, the operation of the third embodiment is such that the looper 41 can move between the engagement position of the looper 41 and the sewing needle 19 and the standby position, and the cam mechanism 70 However, the operation of the second embodiment is different from that of the second embodiment in that it can be moved between the engagement position of the stitch and the sewing needle 19 and the standby position. Operating phase data 66 by the switching means 85,
The switching operation of the stitch type based on the selection of 71 is the same as in the above-described second embodiment.

When the switching means 85 selects the operation phase data 66, a command is issued to the driving means 83 at the same time to
To move the moving table 87 for the looper 41 to the looper 4
The sewing needle 19 is moved toward an engagement position between the sewing needle 1 and the sewing needle 19. Also,
Instruct the driving means 84 to rotate the motor 92 and move the moving table 91 for the stir mechanism 70 to a standby position separated from the sewing needle 19. Conversely, when the switching means 85 selects the operation position data 71, it simultaneously instructs the driving means 83 to rotate the motor 88 and move the moving table 87 for the looper 41 to a standby position away from the sewing needle 19. . In addition, the driving unit 84 is instructed to rotate the motor 92, and the moving table 91 for the kama mechanism 70 is moved toward the engagement position between the kama and the sewing needle 19. In addition, each moving table 87, 91
Is located at a predetermined position, the above-described movement is not performed.

As described above, when performing double chain stitching using the looper 41, the stirrup mechanism 70 can be made to stand by at the standby position, and when performing lockstitching using the stitch mechanism 70, the looper 41 can be set to the standby position. You can wait.

In this embodiment, the looper mechanism 42 or the kama mechanism 70 is moved in the direction of retreating from the sewing needle 19 during standby, but may be moved in the vertical or horizontal direction. May be rotated by 90 degrees or another angle.

(Fourth Embodiment) FIG. 15 shows a configuration of a main part of a sewing machine according to a fourth embodiment of the present invention.

In the fourth embodiment, an exchangeable looper section 100 and an exchangeable cam section 101 are provided, and the exchangeable looper section 100 and the exchangeable cam section 1 are provided on the sewing machine body.
The second embodiment is different from the second embodiment in that a lower thread mechanism holding portion 102 that selectively accommodates either one of the first and the second is provided.

The exchangeable looper section 100 includes a looper 41,
Looper mechanism 42, motor 49, looper threading mechanism 4
6 and a motor 51 are arranged in a cassette 103. The replaceable looper unit 100 is configured to maintain a relationship in which the looper 41 and the sewing needle 19 can form a double chain stitch when inserted and held in the lower thread mechanism holding unit 102. Each of the motors 49 and 51 is provided in the cassette 103.
A connector 105 is provided for connecting a power supply and an electric signal to the lower thread mechanism holding unit 102.
5 is provided.

Similarly, the replaceable comb section 101 has a structure in which the comb mechanism 70 and the motor 50 are arranged in the cassette 104. The exchangeable hook section 101 is provided with the lower thread mechanism holding section 10.
2, the stitch mechanism 70 and the sewing needle 19 maintain a relationship in which a stitch for final stitching can be formed. In the cassette 103 and the cassette 104, the size of the portion fitted to the lower thread mechanism holding portion 102 is the same. Further, the cassette 104 is provided with a connector 105 connected to the connector 106 similarly to the cassette 103.

The operation of the fourth embodiment configured as described above will be described below.

The formation of the seam is the same as in the second embodiment. The switching of the stitches in the fourth embodiment is performed in the following two-stage procedure.

First, the cassette 103 or the cassette 104 is removed from the lower thread mechanism holding section 102, and a substitute cassette 104 or the cassette 103 is inserted. Next, by operating the switching means 64 in the control device 73 having the same configuration as that of FIG. 8, when the cassette 103 having the looper 41 is inserted, the operation phase data 66 is selected, and When the provided cassette 104 is inserted, the operation phase data 71 is selected.

In the above description, the cassette 103,
After exchanging 104, one of the operation phase data 66 and 71 is selected by the switching means 64. However, an identification code is set in the connector 105, and when this is connected to the connector 106, It may be a method of selectively selecting.

The mechanism consisting of the needle bar 36, the crank mechanism 38, and the motor 37 is configured to be twisted 90 degrees about the needle bar 36 by a motor or the like, and the direction of the twist can be selected by selecting the operation phase data. In this way, a configuration in which the direction of the needle hole is automatically changed may be adopted.

The arrangement and the insertion direction of the cassettes 103 and 104 may be other.

(Fifth Embodiment) FIG. 16 is a block diagram of a sewing machine according to a fifth embodiment of the present invention, and FIG. 17 is a diagram for explaining the function of the setting means 121 in FIG.

The configuration of the fifth embodiment is different from the second embodiment in the control device 110. That is, control device 110 shown in FIG. 16 differs from control device 73 shown in FIG. 8 in the following configuration.

The command means 111 outputs a command relating to sewing to the synchronization control means 112 and the phase difference limiting means 1
13 is received.

The synchronization control means 112 receives the command from the command means 111 as described above, and receives the operation phase data 66,7.
Based on the above, a command is given to each of the driving means 114 to 119 from the driving means 114 to the driving means 119, and the sensor signal SE from the motor 37 for driving the needle bar 36 is monitored. In addition, the synchronization control means 112
The error signal ERP from 119 is also monitored. Each of the operation phase data 66 and 71 can be changed by the correction unit 120 and the setting unit 121. Each operation phase data 66, 71 is
The data can be exchanged with the data stored in the storage means 122. Driving commands to the driving units 114 to 119 are transmitted to the phase difference correcting unit 123.
Can be adjusted respectively. The synchronization control unit 112 outputs the error signal ERP from each of the driving units 114 to 119 to the phase difference detection unit 124. Furthermore, synchronization control means 112
Is a sensor signal S from a motor 37 for driving the needle bar 36.
E is calculated, and the result is used as a speed signal by the correction means 120.
Output to

Each of the driving means 114 to 119 outputs
The outputs to 7 to 54 are provided with a current sensor 125, and a current detecting means 126 monitors the current. The outputs of the current detecting means 126 and the phase difference detecting means 124 are received by the phase difference correcting means 123. The output of the phase difference detecting means 124 is also input to the phase difference limiting means 113. Storage means 12
The storage data of No. 2 is selected by the selection means 127 and exchanged with the operation phase data of the synchronization control means 112.

Driving power for each of the driving units 114 to 119 is supplied from the driving source limiting unit 128. The signal of the origin return means 129 is output to the synchronization control means 112 and the drive source restriction means 128.

The operation of the sewing machine thus configured according to the fifth embodiment will be described below.

The first operation will be described. In the operation phase data shown in FIG. 11 for the second embodiment, the horizontal axis is the data of the operation command to the motor 37 for driving the needle bar 36. In the fifth embodiment, the horizontal axis is the sensor The signal SE is set as an actually measured position of the motor 37 obtained by monitoring. The signal from the command means 111 is the motor 37
Is output to the driving means 114 as a speed command for
When the motor 37 rotates and the sensor signal SE is generated, the value of the horizontal axis of the operation phase data increases, and the other motors follow the angle corresponding to the angle.

Even when the motor 37 is rotated without being instructed by the instructing means 111, the other motors follow.

Next, the second operation will be described. Motor 37
When the rotation of the motor 37 is low, each of the other subordinate motors can drive each mechanism according to the operation phase data.
If the rotation of the gear becomes faster, it may not be possible to follow the movement due to the influence of the inertia and friction of each mechanism or the behavior of the yarn. For this reason, the correction means 120 is provided by the synchronization control means 112
, And operates on the operation phase data to advance the operation of each slave motor. That is, as shown at D in FIG. 17, the data curve is shifted to the left as the speed becomes higher.

The third operation will be described. In the synchronous phase data of FIG. 5 or FIG. 11, (a) to (f)
The important points in operating each mechanism in association with each other, such as the synchronization control point as shown by, that is, the point at which it meets the sewing needle 19, the point at which the thread is pulled in, the point at which the loop formed by the thread is hooked or deviated from the loop, and the like. is there. Between these synchronization control points, changing the data to some extent has no significant effect on stitch formation. However, the quality of the seam is slightly affected. Therefore, it is necessary to change data between the synchronization control points according to the material and thickness of the cloth, the material and thickness of the thread, the sewing speed, and the like. The first function of the setting unit 121 is as follows.
This is to change the operation phase data of FIG. 5 or 11 without changing the synchronization control point. For example, the setting unit 121
Although the details of the operation and display of are omitted, the motor 49 in FIG.
Is shifted upward from the solid line as shown by E, the "(d) (e)" terms are increased by the setting means 121 as necessary. In the case of F, the “(e) (f)” term is reduced as necessary.

The fourth operation is the synchronization control points (a) to (f)
Is to change. To elaborate, in fact,
It is necessary to readjust the synchronization control point due to the connection between each motor and each mechanism, the assembly error of each mechanism, and the like. At this time, the second function of the setting means 121 is as shown in FIG.
The synchronization control point of the first operation phase data is changed. For example,
In FIG. 17, when the synchronization control point (e) of the motor 49 is changed to G, the "motor 49 (e)" item is reduced by the setting means 121 as necessary. Further, for example, when (d) is changed to the horizontal direction like H, the "motor 37 (d)" item is increased by the setting means 121 as necessary.

In the fifth operation, the operation phase data obtained in the third operation or the fourth operation is stored in the storage means 122.
And changing the operation phase data by the selection means 127 as necessary.

The sixth operation will be described. Each of the driving units 114 to 119 reports an error of the actually measured position of each of the motors 37 to 54 to a command from the synchronization control unit 112 to the synchronization control unit 112 as an error signal ERP. The synchronization control unit 112 reports the error signal ERP from each of the driving units 114 to 119 to the phase difference detection unit 124. The phase difference limiting means 113 receives the signal from the phase difference detecting means 124, and the error signals ERP from the driving means 115 to 119 other than the driving means 114 of the motor 37 exceed a certain value, or When the synchronous control point cannot be maintained, the command means 111 acts so as to decrease the value of the speed command from the command means 111. Therefore, the command means 1
11 issues a speed command to reduce the speed of the motor 37,
This allows another motor to follow.

The seventh operation will be described. An output from each of the driving units 114 to 119 is monitored by a current detection unit 126 via a current sensor 125, and a state where a load is heavy or a restricted state is detected for any of the mechanisms. Further, the phase difference detecting means 124 detects that the error from the operation phase data has increased. Then, when these detections are performed, the phase difference correction unit 123 sets the synchronization control unit 1
Acting on 12, the motor 37 is stopped or reversely rotated until there is no error.

The eighth operation is that each of the driving means 114 to 119
By supplying each of the motor driving power sources from the driving source restricting means 128, the voltage can be reduced. At the time of the above-mentioned adjustment of the synchronization control point, etc., the drive source restricting means 128
Is operated, the voltage of the motor drive power supply is reduced to about 1/5, and the drive power of the motors 37 to 54 is reduced.

The ninth operation will be described. Control device 1
When the power is turned on, the operation position of each mechanism may not match the operation phase data. This is, for example, when the needle bar 36 or the stir mechanism 70 is moved with the power turned off. At this time, if all the mechanisms are moved at the same time in order to match the operation phase data, there is a case where the camera and the needle interfere. In such a case, the origin return means 129
First, the motor 37 for driving the sewing needle 19 is connected to the sewing needle 1.
Rotate only in the direction in which 9 rises. In other words, since 180 degrees of the motor 37 is the lowest point of the needle bar 36 on the horizontal axis in FIG. 11, the rotation direction of the motor 37 is changed at 180 degrees, and the motor 37 is rotated in the forward direction from 180 degrees to 360 degrees. The motor 37 is rotated in the reverse direction from 0 to 180 degrees to return to the original position of 0 degrees. Next, after confirming that the motor 37 has returned to the home position, the respective mechanisms such as the stirrer mechanism and the looper mechanism are returned to the home position.

As described above, the origin return means 129 has the function of determining the origin return procedure for each mechanism. further,
The origin return means 129 operates the drive source restriction means 128 to reduce the driving force of each motor until the origin return operation is completed.

In the above-described second operation, the operation phase data is shifted to the left as the speed of the motor 37 increases. However, the shape of the curve may be changed so as to partially shift.

In the fifth operation, the data in the storage means may be set in advance.

In the eighth operation, the voltage of the motor drive power supply is lowered. However, a command to reduce the maximum current may be issued to each of the driving means 114 to 119.

(Sixth Embodiment) FIG. 18 is a layout diagram of a sewing machine according to a sixth embodiment of the present invention, FIG. 19 is a diagram showing a configuration of a sewing machine unit, and FIG. It is a block diagram of.

In FIG. 18, the pedal 6 and the pedal sensor 8 are arranged at the positions of the feet of the sewing machine table 33, and the sewing machine section 130 is arranged on the table 33. The control device 131 is arranged as a component of the sewing machine unit 130.

In FIG. 19, the sewing machine 130 includes an upper mechanism 132, a bottom mechanism 133, and an upper connection mechanism 134.
And

The upper mechanism 132 includes a sewing needle 19, a needle bar 36 for holding the sewing needle 19, and a motor 3 for driving the needle bar 36.
7. A crank mechanism 38 for converting the rotational movement of the motor 37 into a vertical reciprocating movement of the needle bar 36, an upper thread 29 is fed out by a required amount, and an upper thread reeling mechanism 39, an upper thread reeling mechanism 39 which is pulled back in order to tighten the seam when forming the seam. And a motor 40 for driving the motor. Further, the upper mechanism 132 is provided with an upper holding mechanism 135 that can move left and right as viewed from the front by sliding between the upper connecting mechanism 134 and a motor 136 that moves the upper connecting mechanism 134.

The bottom mechanism 133 is provided with a lower thread mechanism 137. The lower thread mechanism 137 is provided opposite to the needle bar 36 of the upper mechanism 132, and the lower thread mechanism 137 shown in FIG.
It is rotatable in a direction not facing the needle bar 36 around the point K shown in (c). The bottom mechanism 133 has a bottom fixing mechanism 1 for fixing the lower thread mechanism 137 to the bottom mechanism 133.
38 are provided. The lower thread mechanism 137 includes a looper 4
1, looper mechanism 42, looper thread reeling mechanism 46, motor 4
9, a motor 51, a cam mechanism 70, and a motor 50. In the above-described second embodiment, the looper 41 and the kama mechanism 70 are arranged at positions where a seam can be formed in cooperation with the sewing needle 19, respectively.
In No. 7, the upper holding mechanism 135 and the upper connecting mechanism 134 are arranged at positions separated by the moving distance.

The mechanical structure constituting the control device 131 is fixed to the bottom mechanism 133, includes the components shown in FIG. 20, and supports the upper mechanism 132 via the upper connection mechanism 134. The control device 131 includes a motor 136.
And a driving unit 145 for driving the motor 140 are provided. The control device 131 is provided with an upper holding mechanism 139 that can hold the upper connection mechanism 134 and slide the upper connection mechanism 134, and a motor 140 that moves the upper connection mechanism 134 up and down. .

The upper connection mechanism 134 can move the upper mechanism 132 right and left by the motor 136 as described above. Further, the upper connection mechanism 134 includes a motor 140
Can move up and down with respect to the control device 131. The upper mechanism 132 has the needle bar 36 provided to face the lower thread mechanism 137 as described above.
, The needle bar 36 is connected to the lower thread mechanism 1 as shown by a virtual line.
It is rotatable in a direction not facing 37. Furthermore, the upper fixing mechanism 1 is fixed so that the upper mechanism 132 can be fixed at a position where the needle bar 36 faces and cooperates with the lower thread mechanism 137 during sewing.
41 are provided.

The operation based on the above configuration will be described.

In FIG. 20, when the switching means 142 selects the operation phase data 66 for the synchronization control means 143, a command is given to the driving means 144 to drive the motor 136. Thereby, the upper mechanism 132 is moved so that the sewing needle 19 is located at the position of the looper mechanism 42, and the double chain stitching operation is performed. Similarly, when the switching means 142 selects the operation phase data 71, a command is given to the driving means 144, the motor 136 is driven, and the upper mechanism 132 is moved so that the sewing needle 19 is at the position of the kama mechanism 70. At the same time, the lockstitching operation is performed.

When the cloth 20 is taken in and out, the command means 6
3 emits a signal to raise the presser foot. When the synchronization control unit 143 receives the instruction to raise the cloth presser, the driving unit 145 drives the motor 140 to move the upper mechanism 132 upward. When sewing, the upper mechanism 1
32 is moved downward.

The vertical movement function of the upper mechanism 132 may be linked to the thread cutting mechanism of the sewing machine.

The sewing machine mechanism in all the above-described embodiments is merely an example, and the present invention may be applied to any other mechanism.

[0168]

As described above, according to the present invention, each function of the sewing machine constituted by a simple mechanism can be independently driven, and the operation of each mechanism can be electrically adjusted. Multiple seams can be easily switched with the sewing machine.

[Brief description of the drawings]

FIG. 1 is a block diagram of a sewing machine according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing the general general arrangement of the sewing machine of FIG. 1;

FIG. 3 is a detailed view of a mechanism of a main part of the sewing machine of FIG. 1;

FIG. 4 is a diagram showing an example of an operation diagram of the sewing machine in FIG. 1;

FIG. 5 is a diagram showing another example of the operation diagram of the sewing machine in FIG. 1;

FIG. 6 is a diagram showing a seam forming process in the case of performing overcast stitching using the sewing machine of FIG. 1;

FIG. 7 is a diagram showing a seam forming process when performing double chain stitching using the sewing machine of FIG. 1;

FIG. 8 is a block diagram of a sewing machine according to a second embodiment of the present invention.

9 is a detailed view of a mechanism of a main part of the sewing machine of FIG. 8;

FIG. 10 is a detailed view of a kama mechanism in the sewing machine of FIG. 8;

FIG. 11 is a diagram showing an example of an operation diagram of the sewing machine in FIG. 8;

FIG. 12 is a diagram showing a seam forming process when performing lockstitching using the sewing machine of FIG. 8;

FIG. 13 is a block diagram of a sewing machine according to a third embodiment of the present invention.

14 is a detailed view of a mechanism of a main part of the sewing machine of FIG. 13;

FIG. 15 is a detailed view of a mechanism of a main part of a sewing machine according to a fourth embodiment of the present invention.

FIG. 16 is a block diagram of a sewing machine according to a fifth embodiment of the present invention.

FIG. 17 is an operation explanatory view of the sewing machine of FIG. 16;

FIG. 18 is a schematic configuration diagram of a sewing machine according to a sixth embodiment of the present invention.

FIG. 19 is a schematic configuration diagram of a main part of the sewing machine of FIG. 18;

FIG. 20 is a block diagram of the sewing machine of FIG. 18;

FIG. 21 is a schematic layout view of a conventional sewing machine.

FIG. 22 is a schematic configuration diagram of a lockstitch sewing machine part in a conventional sewing machine.

FIG. 23 is a schematic configuration diagram of a chain stitch sewing machine part in a conventional sewing machine.

[Explanation of symbols]

34, 73, 82, 110, 131 Control device 63 Command means 37, 40, 49 to 52, 54, 88, 92, 136,
140 Motor 42 Looper mechanism 44 Looper mechanism 53 Cloth feed mechanism 55 to 61, 83, 84, 114 to 119, 144, 1
45 Driving means 62, 74, 112, 143 Synchronous control means 64, 85, 142 Switching means 65, 66, 71 Operating phase data 70 Comb mechanism 134 Upper connection mechanism

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigeo Negi 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 72) Inventor Kenji Yagami 4-4-12 Nishitenma, Kita-ku, Osaka City, Osaka Prefecture Inside Yamato Sewing Machine Manufacturing Co., Ltd. (72) Ryosuke Fukumoto 2-103-3 Hotaruike Minamicho, Toyonaka City, Osaka Prefecture F-term in the factory (reference) 3B150 AA01 AA05 AA08 CE01 CE03 CE25 DF00 DG00 LA19 LA31 NA77 NB02 NB05 NB06 NC01 QA01 QA06

Claims (20)

[Claims] 1. A needle bar mechanism, a first looper mechanism, and a second looper mechanism.
The needle bar mechanism includes a needle bar that holds a sewing needle, and a first drive source that drives the needle bar, and the first looper mechanism includes a first looper mechanism. 1 looper and a second looper for driving the first looper.
Wherein the second looper mechanism includes a second looper and a third drive source for driving the second looper, wherein the first and second looper mechanisms are In conjunction with the needle bar mechanism, one or both looper mechanisms form a chain stitch seam, and the control device is configured to drive the first to third drive sources respectively. Drive means, a synchronous control means for linking a plurality of the drive means so as to form a seam, and the first and second act on the synchronous control means.
And a switching means for switching the stitch method to be formed by switching the operation of the looper mechanism. 2. A needle bar mechanism, a looper mechanism, a kama mechanism, and a control device, wherein the needle bar mechanism holds a sewing needle, and a first drive source that drives the needle bar. Wherein the looper mechanism includes a looper and a second drive source for driving the looper; the kama mechanism includes a camera and a third drive source for driving the kama; The stitch of the chain stitch method is formed in cooperation with the needle bar mechanism, and the stitch mechanism is configured to form the stitch of the lock stitch method in cooperation with the needle bar mechanism. First to third driving means for respectively driving the first to third driving sources, synchronization control means for operating a plurality of the driving means in cooperation with each other so as to form a seam, and acting on the synchronization control means. Switch the operation of the looper mechanism and the kama mechanism A switching means for switching a stitch method to be formed. 3. The needle bar mechanism, comprising: a needle bar mechanism, a looper mechanism, a looper moving mechanism for moving the looper mechanism, a cam mechanism, a cam moving means for moving the cam mechanism, and a controller. Includes a needle bar for holding a sewing needle, and a first drive source for driving the needle bar, wherein the looper mechanism includes a looper and a second drive source for driving the looper; Includes a kama and a third drive source for driving the kama, wherein the looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, and the kama mechanism is provided with the needle bar mechanism. The control device is configured to form first to third driving means for driving the first to third driving sources, respectively, and a plurality of stitches to form the stitch. Operating the driving means in cooperation with each other Acting on the loop control mechanism, the looper moving mechanism and the stirrer moving mechanism, the looper mechanism when forming a chain stitch seam, and the stitch mechanism when forming a lock stitch seam. A sewing machine comprising: a switching unit that switches a stitch method to be formed by moving the looper mechanism and the stirrer mechanism by operating the synchronization control unit while moving to a cooperative position with a mechanism. 4. A needle bar mechanism, a lower thread mechanism replaceable with a looper mechanism and a baffle mechanism, and a control device. The needle bar mechanism includes a needle bar for holding a sewing needle, A first drive source for driving the needle bar, the looper mechanism includes a looper and a second drive source for driving the looper, and the kama mechanism includes a stirrer and a third drive to drive the stirrup. The looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, and the kama mechanism forms a lock stitch seam in cooperation with the needle bar mechanism. Wherein the control device comprises: first to third driving means for driving the first to third driving sources, respectively; and synchronous control means for causing a plurality of the driving means to cooperate to form a seam. A looper mechanism attached to the lower thread mechanism or A sewing machine comprising: a switching unit that switches a stitch method to be formed by acting on the synchronization control unit in response to a kama mechanism. 5. A needle bar mechanism, a looper mechanism, a cam mechanism, and a control device, wherein the needle bar mechanism holds a sewing needle, and a first drive source that drives the needle bar. Wherein the looper mechanism includes a looper and a second drive source for driving the looper; the kama mechanism includes a camera and a third drive source for driving the kama; The stitch of the chain stitch method is formed in cooperation with the needle bar mechanism, and the stitch mechanism is configured to form the stitch of the lock stitch method in cooperation with the needle bar mechanism. Cooperation of first to third driving means for driving the first to third driving sources, respectively, and the second or third driving source based on a signal representing the operating position of the first driving source Operate a plurality of the driving means so as to form a seam by operation Synchronization control means for causing
A switching means for switching the operation of each mechanism by acting on the synchronization control means, thereby switching a stitch method to be formed. 6. A needle bar mechanism, a looper mechanism, a cam mechanism, and a control device, wherein the needle bar mechanism holds a sewing needle, and a first drive source that drives the needle bar. Wherein the looper mechanism includes a looper and a second drive source for driving the looper; the kama mechanism includes a camera and a third drive source for driving the kama; The stitch of the chain stitch method is formed in cooperation with the needle bar mechanism, and the stitch mechanism is configured to form the stitch of the lock stitch method in cooperation with the needle bar mechanism. First to third driving means for driving the first to third driving sources, respectively; and operating phase data of the second and third driving sources while the first driving source operates in one stroke. By having, a plurality of the driving means cooperate to form a seam. Synchronizing control means for operating the mechanism, switching means for switching the operation of each mechanism by acting on the synchronizing control means to change a stitch method to be formed, and a second or third position relative to the operating position of the first drive source. So that the operating position of the drive source of the
A setting unit that can change the operation phase data. 7. A needle bar mechanism, a looper mechanism, a kama mechanism, and a control device, wherein the needle bar mechanism holds a sewing needle, and a first drive source that drives the needle bar. Wherein the looper mechanism includes a looper and a second drive source for driving the looper; the kama mechanism includes a camera and a third drive source for driving the kama; The stitch of the chain stitch method is formed in cooperation with the needle bar mechanism, and the stitch mechanism is configured to form the stitch of the lock stitch method in cooperation with the needle bar mechanism. First to third driving means for driving the first to third driving sources, respectively; and operating phase data of the second and third driving sources while the first driving source operates in one stroke. By having, a plurality of the driving means cooperate to form a seam. Synchronizing control means for operating the mechanism, switching means for switching the operation of each mechanism by acting on the synchronizing control means to change a stitch method to be formed, and a second or third position relative to the operating position of the first drive source. The operating position of the first driving source and the operating position of the second or third driving source in parallel in the direction of the coordinate axis in the orthogonal coordinate system using the operating position of the first or second or third driving source as the coordinate axis. A setting means capable of changing phase data. 8. A needle bar mechanism, a looper mechanism, a kama mechanism, and a control device, wherein the needle bar mechanism holds a sewing needle, and a first drive source that drives the needle bar. Wherein the looper mechanism includes a looper and a second drive source for driving the looper; the kama mechanism includes a camera and a third drive source for driving the kama; The stitch of the chain stitch method is formed in cooperation with the needle bar mechanism, and the stitch mechanism is configured to form the stitch of the lock stitch method in cooperation with the needle bar mechanism. First to third driving means for driving the first to third driving sources, respectively; and operating phase data of the second and third driving sources while the first driving source operates in one stroke. By having, a plurality of the driving means cooperate to form a seam. A synchronous control unit that operates, a switching unit that switches the stitch method to be formed by switching the operation of each mechanism by acting on the synchronous control unit, and a change in the actual operation speed of the first drive source. And a correcting means for correcting the operation phase data so as to shift the operation of the first drive source and the operation of the second or third drive source at a fixed ratio. . 9. A needle bar mechanism, a looper mechanism, a kama mechanism, and a control device, wherein the needle bar mechanism holds a sewing needle, and a first drive source that drives the needle bar. Wherein the looper mechanism includes a looper and a second drive source for driving the looper; the kama mechanism includes a camera and a third drive source for driving the kama; The stitch of the chain stitch method is formed in cooperation with the needle bar mechanism, and the stitch mechanism is configured to form the stitch of the lock stitch method in cooperation with the needle bar mechanism. First to third driving means for driving the first to third driving sources, respectively; and operating phase data of the second and third driving sources while the first driving source operates in one stroke. By having, a plurality of the driving means cooperate to form a seam. Synchronous control means to operate, a switching means for switching the operation of each mechanism by acting on the synchronous control means, to switch a stitch method to be formed, a storage means capable of storing a plurality of sets of the operation phase data, Selecting means for selecting operation phase data to be provided to the synchronization control means from a plurality of sets of the operation phase data stored in the storage means. 10. A needle bar mechanism, a looper mechanism, a kama mechanism, and a control device, wherein the needle bar mechanism holds a sewing needle, and a first drive source that drives the needle bar. Wherein the looper mechanism includes a looper and a second drive source for driving the looper; the kama mechanism includes a camera and a third drive source for driving the kama; The stitch of the chain stitch method is formed in cooperation with the needle bar mechanism, and the stitch mechanism is configured to form the stitch of the lock stitch method in cooperation with the needle bar mechanism. First to third driving means for driving the first to third driving sources, respectively; and operating phase data of the second and third driving sources while the first driving source operates in one stroke. By having, a plurality of the driving means are linked so as to form a seam Synchronizing control means for operating, a switching means for switching the operation of each mechanism by acting on the synchronizing control means to switch a stitch method to be formed, and a means for controlling the operation phase data and the second or third drive source. A phase difference limiting means for increasing or decreasing the speed of the first drive source when an error from an actual operation phase becomes equal to or more than a predetermined value. 11. A needle bar mechanism, a looper mechanism, a kama mechanism, and a control device, wherein the needle bar mechanism holds a sewing needle, and a first drive source that drives the needle bar. Wherein the looper mechanism includes a looper and a second drive source for driving the looper; the kama mechanism includes a camera and a third drive source for driving the kama; The stitch of the chain stitch method is formed in cooperation with the needle bar mechanism, and the stitch mechanism is configured to form the stitch of the lock stitch method in cooperation with the needle bar mechanism. First to third driving means for respectively driving the first to third driving sources, synchronization control means for operating a plurality of the driving means in cooperation with each other so as to form a seam, and acting on the synchronization control means. Forming by switching the operation of each mechanism A switching unit for switching a stitch method to be performed, and an origin which acts on the synchronizing unit when the mechanisms cannot cooperate, and returns the plurality of driving sources to the origin positions of the mechanisms in an order in which the mechanisms do not interfere with each other. And a return means. 12. A needle bar mechanism, a looper mechanism, a kama mechanism, and a control device, wherein the needle bar mechanism holds a sewing needle, and a first drive source that drives the needle bar. Wherein the looper mechanism includes a looper and a second drive source for driving the looper; the kama mechanism includes a camera and a third drive source for driving the kama; The stitch of the chain stitch method is formed in cooperation with the needle bar mechanism, and the stitch mechanism is configured to form the stitch of the lock stitch method in cooperation with the needle bar mechanism. First to third driving means for respectively driving the first to third driving sources, synchronization control means for operating a plurality of the driving means in cooperation with each other so as to form a seam, and acting on the synchronization control means. Forming by switching the operation of each mechanism Switching means for switching the stitch method to be performed, means for adjusting each mechanism or returning each mechanism to the home position, and reducing driving force of each drive source when adjusting each mechanism or returning each mechanism to the home position. And a drive source restricting means. 13. A needle bar mechanism, a looper mechanism, a kama mechanism, and a control device, wherein the needle bar mechanism holds a sewing needle, and a first drive source that drives the needle bar. Wherein the looper mechanism includes a looper and a second drive source for driving the looper; the kama mechanism includes a camera and a third drive source for driving the kama; The stitch of the chain stitch method is formed in cooperation with the needle bar mechanism, and the stitch mechanism is configured to form the stitch of the lock stitch method in cooperation with the needle bar mechanism. First to third driving means for driving the first to third driving sources, respectively; and operating phase data of the second and third driving sources while the first driving source operates in one stroke. By having, a plurality of the driving means are linked so as to form a seam A synchronous control means for operating, a switching means for switching the operation of each mechanism by acting on the synchronous control means to switch a stitch method to be formed, a current detecting means for monitoring a current of each drive source, Current detection means detects a current equal to or greater than a predetermined value for the second and third drive sources, and an error between actual operation of the second and third drive sources and the operation phase data reaches a predetermined value or higher. And a phase difference correcting means for driving the first drive source in the reverse direction until the error is eliminated or the first drive source is stopped. 14. A needle bar mechanism, a bobbin thread mechanism, and a control device, wherein the bobbin thread mechanism includes a looper mechanism and a cam mechanism, and the needle bar mechanism includes a needle bar for holding a sewing needle. A first drive source for driving the needle bar, the looper mechanism includes a looper and a second drive source for driving the looper, and the cam mechanism includes a camera and a second drive for driving the camera. The looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, and the kama mechanism forms a lock stitch seam in cooperation with the needle bar mechanism. Wherein the control device is configured to control the first to third driving means for driving the first to third driving sources, respectively, and to synchronize the plurality of driving means so as to form a seam. Control means, and the synchronous control means A switching means for switching a stitch method to be formed by switching a structure operation, wherein the needle bar mechanism and the lower thread mechanism are supported by a mechanical structure constituting the control device. Sewing machine. 15. A needle bar mechanism, a lower thread mechanism, and a control device, wherein the needle bar mechanism and the lower thread mechanism are supported by a mechanical structure constituting the control device, The lower thread mechanism includes a looper mechanism and a claw mechanism. The needle bar mechanism includes a needle bar that holds a sewing needle, a first drive source that drives the needle bar, the lower thread mechanism, and a needle bar mechanism. And a second drive source for moving the needle bar mechanism with respect to the mechanical structure of the control device so as to change the distance between the looper mechanism and the looper mechanism.
The drive mechanism includes a drive and a fourth drive source that drives the drive, the looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, Further, the kama mechanism is configured to form a lockstitch seam in cooperation with the needle bar mechanism, and the control device is configured to drive the first to fourth drive sources, respectively. A driving unit, a synchronous control unit for operating the plurality of driving units in cooperation with each other so as to form a stitch, and a switching unit for switching an operation of each mechanism by acting on the synchronous control unit to switch a stitch method to be formed. Acting on the second driving means so that the needle bar mechanism approaches the bobbin thread mechanism during the sewing operation, and separates the needle bar mechanism from the bobbin thread mechanism at times other than during the sewing operation. The second Sewing machine characterized in that it comprises a means for operating the dynamic source. 16. A needle bar mechanism, a lower thread mechanism, and a control device, wherein the needle bar mechanism and the lower thread mechanism are supported by a mechanical structure constituting the control device, The lower thread mechanism includes a looper mechanism and a claw mechanism. The needle bar mechanism includes a needle bar that holds a sewing needle, a first drive source that drives the needle bar, and a control mechanism that controls the needle bar mechanism. A second drive source for moving the needle bar mechanism with one of the looper mechanism and the kama mechanism by moving the needle bar mechanism relative to the mechanical structure of the looper mechanism. 3rd driving looper
The drive mechanism includes a drive and a fourth drive source that drives the drive, the looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism, Further, the kama mechanism is configured to form a lockstitch seam in cooperation with the needle bar mechanism, and the control device is configured to drive the first to fourth drive sources, respectively. A driving unit, a synchronization control unit for operating the plurality of driving units in cooperation with each other so as to form a seam, and an operation of the synchronization control unit to switch the operation of each mechanism and an operation of the second driving unit. A sewing machine, comprising: switching means for switching a stitch method to be formed by operating a second drive source. 17. A needle bar mechanism, a lower thread mechanism, and a control device, wherein the needle bar mechanism and the lower position mechanism are provided at positions facing each other, and the lower thread mechanism includes a looper mechanism and a camera. A needle bar mechanism for holding a sewing needle, and a first drive source for driving the needle bar. The looper mechanism includes a looper and a second drive for driving the looper. A drive source, the kama mechanism includes a kama and a third drive source for driving the kama, and the looper mechanism forms a chain stitch seam in cooperation with the needle bar mechanism; The kama mechanism is configured to form a lockstitch seam in cooperation with the needle bar mechanism, and the control device includes first to third driving units that respectively drive the first to third driving sources. Means and a plurality of said driving means so as to form a seam. The needle bar mechanism and the bobbin thread mechanism, wherein the control means controls the operation of the mechanism and switches the operation of each mechanism to switch the stitch system to be formed. The needle bar mechanism is rotatable in a direction not facing the bobbin thread mechanism, and faces the bobbin thread mechanism during a sewing operation. A sewing machine characterized in that the sewing machine is configured to be fixed at a position to be linked with the sewing machine. 18. A needle bar mechanism, a lower thread mechanism, and a control device, wherein the needle bar mechanism and the lower position mechanism are provided at positions facing each other, and the lower thread mechanism includes a looper mechanism and a camera. A needle bar mechanism for holding a sewing needle, and a first drive source for driving the needle bar. The looper mechanism includes a looper and a second drive for driving the looper. A drive source; the kama mechanism includes a kama and a third drive source for driving the kama; the looper mechanism forms a ring-stitch seam in cooperation with the needle bar mechanism; The kama mechanism is configured to form a lockstitch seam in cooperation with the needle bar mechanism, and the control device is configured to perform first to third driving for driving the first to third driving sources, respectively. Means and a plurality of said driving means so as to form a seam. The needle bar mechanism and the bobbin thread mechanism, wherein the control means controls the operation of the mechanism and switches the operation of each mechanism to switch the stitch system to be formed. The lower thread mechanism is rotatable in a direction not facing the needle bar mechanism, and faces the needle bar mechanism during a sewing operation. A sewing machine characterized in that the sewing machine is configured to be fixed at a position to be linked with the sewing machine. 19. A needle thread reeling-out mechanism for reeling out and pulling out a required amount of upper thread when forming a stitch, a looper thread reeling-out mechanism for reeling out and pulling out a required amount of looper thread passing through each looper mechanism, and a drive source for driving each of the threading mechanisms. Wherein the control device includes driving means for driving each of the driving sources, and the synchronous control means is configured to operate the thread reeling mechanism in cooperation with a needle bar mechanism. 19. The sewing machine according to any one of the up to 18. 20. A control device comprising: a cloth feed mechanism; and a drive source for driving the cloth feed mechanism. The control device includes drive means for driving a drive source of the cloth feed mechanism. 20. The apparatus according to claim 1, wherein the feed mechanism is operated in cooperation with the needle bar mechanism, and the cloth feed mechanism is operated independently without cooperating with the needle bar mechanism. The sewing machine described in the item.