JP2001025596A - Sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sewing machine which is capable of lessening the load of an operation to remove threads, etc., from, for example, a thread loop capturing device by facilitating the manual turning of the thread loop capturing device in case of the occurrence of the prescribed abnormality of the sewing machine, for example, a deviation in synchronization of a sewing machine spindle and a hook shaft by a prescribed quantity or above. SOLUTION: When the sewing machine spindle and the hook shaft 60 give rise to the deviation of the synchronization by more than the prescribed quantity or when the origin setting of the hook shaft 60 is not adequately executed or further, when the hook shaft 60 is disengaged from a standby position, the energization to a hook drive motor 58 for driving the hook shaft 60 is stopped when these cases are detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine motor for driving a main shaft of a sewing machine, and a hook driving motor for driving a hook shaft for rotating a yarn catcher in a system independent of the sewing machine motor. In regard to the sewing machine to be controlled synchronously, in particular, when there is a predetermined abnormality, for example, when the sewing machine main shaft and the hook shaft material are out of synchronization by a predetermined amount or more, or when the origin of the hook shaft material is not properly performed, When the material comes off the standby position,
The present invention relates to a sewing machine that can stop energization of a hook driving motor that drives a hook shaft member.

[0002]

2. Description of the Related Art Conventionally, a sewing machine main body of a normal sewing machine mainly includes a bed portion, a pillar portion, an arm portion, and a head portion, and a main shaft driven by a sewing machine motor is provided in the arm portion. , The needle bar, the sewing needle and the balance are driven up and down by the driving force of the main shaft. Further, in the bed portion, a thread wheel catching hook cooperating with the sewing needle and a shuttle shaft for driving the thread wheel catching hook are provided, but it is necessary to synchronize the sewing needle and the thread wheel catching shuttle with each other. Therefore, in the conventional sewing machine, the shuttle shaft is also configured to be rotationally driven by the main shaft.

[0003] There is a main shaft thread catching shaft independent sewing machine different from such a sewing machine. The sewing machine has a dedicated hook drive motor for the hook for catching the thread wheel in addition to the sewing machine motor for driving the needle bar, sewing needle and balance up and down, so that the hook drive motor is driven independently of the drive of the sewing machine main shaft. At that time,
The rotation of the thread catching hook is synchronized with the main shaft of the sewing machine, and the rotation state of the thread catching hook can be controlled in accordance with the sewing conditions (for example, see Japanese Patent Application Laid-Open No. 60-2175).
0, JP-A-3-234291, etc.).

In such a sewing machine in which the thread catching hook is driven synchronously independently of the main shaft, various measures have been proposed to prevent the synchronization between the sewing needle and the thread catching hook by manual operation. However, it has not been sufficiently proposed that a countermeasure to be taken when the amount of the synchronous deviation during the sewing operation of the sewing machine exceeds the allowable value is sufficient.

[0005]

For example, it is conceivable that the upper thread or the lower thread may be entangled in the thread catching hook as a cause of the synchronization deviation. Is stopped and an error message is displayed to that effect. In that case, in order to remove the yarn entangled in the yarn catching hook, the operator manually rotates the yarn catching hook to shift the rotation position, and manually removes the entangled yarn.

In general, a stepping motor or a servomotor is used as a motor for driving the shuttle for catching the yarn loop. These stepping motors and servomotors are energized even when the rotation is stopped, and have a static torque. are doing. Therefore, when removing the yarn from the yarn catching hook, a large force is required to manually rotate the yarn catching hook to a place where it can be easily removed, and the work is burdensome. Further, as a device for interrupting the energization of the shuttle driving motor, for example, as disclosed in Japanese Patent Application Laid-Open No. Hei 4-367691, there is a sewing machine provided with a hand-turning mode in which a thread wheel catching hook is turned by hand. In this case, it is troublesome to operate the hand-turning mode switch to cut off the power supply to the shuttle drive motor. An object of the present invention is to perform a predetermined abnormality of a sewing machine, for example, when a hook shaft and a main shaft of a sewing machine are out of synchronization by a predetermined amount or more, and in other cases, without manually performing a complicated operation, manually operate the thread catcher. An object of the present invention is to provide a sewing machine that can be easily turned to reduce the burden of removing a thread or the like from a thread wheel catching hook, for example.

[0007]

According to a first aspect of the present invention, there is provided a sewing machine motor for driving a needle bar on which a sewing needle is mounted via a main shaft of a sewing machine, and a thread wheel cooperating with the sewing needle to capture a thread wheel. A shuttle drive motor for driving the shuttle shaft material for rotating the catcher independently of the sewing machine spindle, and the shuttle drive motor and the sewing machine motor so that the thread catcher rotates in synchronization with the sewing machine spindle. In the sewing machine to be controlled, the sewing machine includes a detecting unit configured to detect a predetermined abnormality of the sewing machine, and a stop unit configured to stop energizing the shuttle drive motor when the detecting unit detects the predetermined abnormality. And As a result, when a predetermined abnormality is detected, the energization of the shuttle drive motor for driving the shuttle shaft member is stopped, so that it is easy to manually turn the yarn catcher without performing a complicated operation. Become. Therefore, when performing an operation of removing, for example, an entangled yarn or the like from the yarn loop catcher or other operations, the burden can be reduced.

According to a second aspect of the present invention, there is provided a sewing machine motor for driving a needle bar on which a sewing needle is mounted via a main shaft of the sewing machine.
A shuttle shaft motor for driving a spool shaft that rotates a thread catcher that catches a thread wheel in cooperation with the sewing needle, and a shuttle drive motor that drives independently of the sewing machine spindle; the thread catcher is synchronized with the sewing machine spindle; In the sewing machine that controls the shuttle drive motor and the sewing machine motor so as to rotate, a detection unit that detects a predetermined amount or more of synchronization deviation between the sewing machine main shaft and the shuttle shaft member. And stopping means for stopping the power supply to the shuttle drive motor when a synchronization shift is detected. Thereby, when it is detected that the sewing machine main shaft and the hook shaft material are out of synchronization by a predetermined amount or more, the power supply to the hook drive motor for driving the hook shaft material is stopped.
It becomes easy to manually rotate the yarn catcher without performing complicated operations. Therefore, when performing an operation of removing, for example, an entangled yarn or the like from the yarn loop catcher or other operations, the burden can be reduced.

According to a third aspect of the present invention, there is provided a sewing machine motor for driving a needle bar on which a sewing needle is mounted via a main shaft of the sewing machine.
A shuttle shaft motor for driving a spool shaft that rotates a thread catcher that catches a thread wheel in cooperation with the sewing needle, and a shuttle drive motor that drives independently of the sewing machine spindle; the thread catcher is synchronized with the sewing machine spindle; In the sewing machine that controls the shuttle drive motor and the sewing machine motor so that the shuttle shaft rotates, the detecting means for detecting the abnormality of the origin of the shuttle shaft material, and the detection means detects the abnormality of the origin search of the shuttle shaft material. And stopping means for stopping the power supply to the shuttle drive motor. As a result, when an abnormality of the origin search of the hook shaft member is detected, the energization to the hook drive motor for driving the hook shaft member is stopped.
It is easy to manually rotate the yarn catcher without complicated operations, and to reduce the burden when removing, for example, entangled yarn from the yarn catcher or performing other operations. Can be.

According to a fourth aspect of the present invention, there is provided a sewing machine motor for driving a needle bar on which a sewing needle is mounted via a main shaft of the sewing machine.
A shuttle shaft motor for driving a spool shaft that rotates a thread catcher that catches a thread wheel in cooperation with the sewing needle, and a shuttle drive motor that drives independently of the sewing machine spindle; the thread catcher is synchronized with the sewing machine spindle; In the sewing machine that controls the shuttle driving motor and the sewing machine motor so that the shuttle shaft rotates, the detecting means detects that the shuttle shaft member has deviated from the standby position, and the hook shaft member has deviated from the standby position by this detecting means. And stopping means for stopping the energization of the shuttle drive motor when the detection is made. As a result, when it is detected that the shuttle shaft member has deviated from the standby position, the power supply to the shuttle drive motor that drives the shuttle shaft member is stopped, so that the thread wheel catcher can be moved without complicated operation. It becomes easy to turn it manually, and it is possible to reduce the burden when performing, for example, an operation of removing a tangled yarn or the like from the yarn catcher or other operations. In addition, Claim 1
The term "stop the energization of the shuttle drive motor" described in claim 4 means that the drive current to the shuttle drive motor is completely cut off, and in addition to manually turning the yarn catcher. This means that the amount of current for driving flowing to the shuttle drive motor during sewing may be reduced to the extent that the sewing becomes easy.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, a display unit for displaying a detection result of the detection unit as an error warning is provided. And As a result, the operator can see from the display means that an error warning has been generated based on the detection result, so that, for example, an operation of removing a tangled yarn or the like from the yarn catcher and other operations may be performed.

According to the sewing machine of the sixth aspect, in the invention of the fifth aspect, after the error warning displayed on the display means is canceled, the shuttle drive motor is re-energized, and the starting point of the shuttle shaft member is set. It is characterized by having an origin setting means for setting. In this way, the hook drive motor is re-energized, and the origin of the hook shaft is determined. If the origin of the hook shaft is properly determined, the sewing machine waits for the start of sewing. Further, when the hook drive motor is, for example, a pulse motor, a relative misalignment between the thread catcher and the sewing needle may occur due to step-out of the motor. In view of the fact that the sewing machine is damaged due to interference between the wheel catcher and the sewing needle, when a synchronization deviation of a predetermined amount or more between the sewing machine main shaft and the shuttle shaft member is detected, the sword tip of the thread catcher and the needle are Then, the needle bar jump mechanism is operated so that the positional relationship does not interfere with the needle bar jumping mechanism. Therefore, the needle bar to which the sewing needle is attached is forcibly jumped to the top dead center position, and the interference between the thread catcher and the sewing needle due to the synchronization deviation can be reliably prevented.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. In the present embodiment,
A multi-head embroidery sewing machine provided with three embroidery sewing machines will be described, but the present invention is not necessarily implemented in a multi-head embroidery sewing machine. Each of the embroidery sewing machines is a so-called upper shaft / lower shaft independent drive type sewing machine, in which all the rotary hooks for catching the thread wheel are rotationally driven by a hook drive motor independent of the sewing machine motor. This multi-head embroidery sewing machine M
As shown in FIG. 1, a base frame 1 extending in the left-right direction is provided, and a sewing machine support plate 2 having a predetermined length in the left-right direction and having a substantially rectangular shape in a plan view is disposed on a rear side of an upper surface thereof. In addition, a support frame 3 extending in the left-right direction is provided upright at a rear end portion of the sewing machine support plate 2. The support frame 3 has three head portions 4 to 6 arranged side by side at predetermined intervals in the left-right direction. Further, at the front end of the sewing machine support plate 2 of the base frame 1, cylindrical bed portions 7 to 7 are provided.
9 are provided respectively, and bed units 10 to 1 are provided.
2 is a bed section 7-9 corresponding to the head section 4-6.
Respectively.

Therefore, the head units 4 to 6 provided on the support frame 3 and the independent bed units 10 to 12 are provided.
The three multi-needle embroidery sewing machines M1 to M3 are arranged side by side. At the front end of each of the heads 4 to 6 of the embroidery sewing machines M1 to M3, twelve needle bars 21 arranged in a line in the left-right direction are supported so as to be vertically movable. The front end of each of the heads 4 to 6 has 12
A needle bar case 20 for swingably supporting the balances 23 is provided, and the needle bar case 20 is supported so as to be movable in the left-right direction. Each needle bar case 20 is simultaneously moved in the left-right direction by a needle bar changing mechanism (not shown) driven by a needle bar changing motor 115 (see FIG. 8).
Embroidery thread color can be changed at the same time. Also,
A work table 13 is provided on the front side of the sewing machine support plate 2 and is flush with the upper surfaces of the bed units 10 to 12. On the left and right sides of the work table 13, 1
A pair of auxiliary tables 14 and 15 are provided. On the working table 13, a movable frame 16 having a rectangular frame shape in a plan view and extending in the left-right direction is placed so as to span the auxiliary tables 14 and 15. I have.

The drive frame 16a at the left end of the movable frame 16
Is driven to move in the X-axis direction (left-right direction) by an X-axis driving mechanism (not shown).
And a drive frame 16b at the right end of the Y-axis drive mechanism (not shown).
As a result, it is driven to move in the Y-axis direction (front-back direction). Therefore, the movable frame 16 is provided with an X-axis drive motor 117 (see FIG. 8).
X-axis drive mechanism driven by Y and Y-axis drive motor 119
(See FIG. 8), the XY
It can be moved on a plane. Auxiliary table 1
An operation panel 18 for executing various commands is provided on the rear side of the operation panel 6b. The operation panel 18 includes a display 18a for displaying a message relating to embroidery sewing.

Next, a needle bar vertical drive mechanism 25 provided for each of the embroidery sewing machines M1 to M3 for vertically driving the needle bar 21 will be described with reference to FIG. A base needle bar 26 extending in the up-down direction is disposed at the tip of each of the heads 4 to 6, and the base needle bar 26 is supported by the frame F at its upper end and lower end. A vertically moving member 27 having an engagement groove 27a that engages with a connecting pin 34 described later is inserted into the base needle bar 26 so as to be vertically movable, and a needle bar provided at a lower end of the vertically moving member 27 is provided. The holding member 28 is vertically and non-rotatably inserted into the base needle bar 26, and
A vertically movable member 27 is rotatably connected to the lower end of the member 7. The needle bar holder 28 is provided with a link 31 connected to a swing lever 30 pivotally supported by a pivot 29.
It is connected to.

On the other hand, an eccentric cam 32 is fixed to the main shaft 17 of the sewing machine which is disposed in the left and right direction through each of the heads 4 to 6, and the eccentric lever 3 which is externally fitted to the eccentric cam 32.
The lower end of 3 is connected to the swing lever 30. A sewing needle 22 is attached to the lower end of each of the twelve needle bars 21, and a connecting pin 34 is fixed to a substantially middle portion of the needle bar 21 in the height direction. A compression spring 35 is externally fitted between the support frame of the needle bar case 20 and the needle bar 21. The compression spring 35 constantly urges the needle bar 21 to the upper needle position.
Further, when the needle bar case 20 moves in the left-right direction, the connecting pin 34 of the needle bar 21 facing the vertical moving member 27 is selectively engaged with the engaging groove 27a of the vertical moving member 27. Has become.

As a result, the sewing machine main shaft 17 is rotated by the rotation of the sewing machine motor 110 in a predetermined rotation direction, and the vertical moving member 27 and the needle bar holder are held via the eccentric lever 33, the swing lever 30 and the link 31. As the needle 28 moves up and down integrally, only the needle bar 21 connected to the up-down moving member 27 via the connecting pin 34 is reciprocated up and down while adjusting to the main shaft 17 of the sewing machine. Next, each embroidery machine M
A needle bar jump mechanism 40 provided for each of 1 to M3 to jump the needle bar 21 to its uppermost position (top dead center position) will be described with reference to FIG. In the needle bar case 20,
A horizontally oriented needle bar jump solenoid 41 is provided, and a substantially L-shaped rotation lever 42 in plan view is attached to the needle bar case 20 so as to be rotatable about a vertical axis.
The drive part 42a of the rotary lever 42 contacts the plunger of the needle bar jump solenoid 41, and the vertical operation shaft 4 attached to the driven part 42b.
3 can be engaged with a protruding engagement portion 27 a formed integrally with the vertical movement member 27.

Further, the vertically moving member 27 is always elastically moved by a winding spring 44 provided at the upper end thereof so as to rotate from a rotated jump position indicated by a two-dot chain line to a normal connection position indicated by a solid line. It is being rushed. Accordingly, when the needle bar 21 is connected to the up and down moving member 27 via the connection pin 34, the needle bar jump solenoid 41 is driven for a predetermined time, and when the plunger advances rightward, The pivoting lever 42 pivots clockwise in plan view, and the vertical moving member 27 pivots to the jump position shown by a two-dot chain line via the operating shaft 43 and the engaging portion 27a, and is connected. The engagement between the pin 34 and the engagement groove 27a is released, and at the same time, the needle bar 21 is moved at a stroke to the needle position by the compression spring 35 (jump operation).

On the other hand, when the needle bar 21 has jumped to the needle upper position and the vertical moving member 27 has returned to the connecting position, the vertical moving member 27 rises from below to the direction of its substantially uppermost position. Sometimes, the vertical moving member 27 is
4, but temporarily pivots to the jump position, but is immediately returned to the coupling position by the winding spring 44, and the coupling pin 34 is automatically coupled to the engagement groove 27a. ing. Here, the presser foot 45 provided on each of the beds 7 to 9 is pressed by a presser foot drive mechanism (not shown) driven by a presser foot drive solenoid 106 to press the work cloth W on the beds 7 to 9. The position can be switched up and down over the position and the retracted position that has risen a predetermined distance.

Next, the bed units 10 to 12 will be described with reference to FIGS. Here, since the three bed units 10 to 12 have the same configuration, the leftmost bed unit 10 will be described. A bed case 50 having a substantially U-shaped section extending in the front-rear direction has a pair of support brackets 5 fixed at its rear end to a base frame 1 extending in the left-right direction located at the front end of the sewing machine support plate 2.
1 and at the front end of the bed case 50,
The shuttle module 55 is detachably fixed. Here, the upper side of the bed case 50 is covered with a needle plate 52 at its front end portion, and is covered with a cover plate 53 that is continuous with the needle plate 52.

Next, the shuttle module 55 will be described. As shown in FIGS. 4 and 5, a mounting block 56 is detachably fixed to a front end of the bed case 50 by a screw 57, and a hook driving motor including a pulse motor is mounted on a rear end of the mounting block 56. 58 are attached. On the other hand, on the front end side of the mounting block 56, a full rotary hook 59 for catching the thread wheel is provided, and a hook shaft 60 fixed to the full rotary hook 59 is pivotally connected to the mounting block 56 so as to be adjustable in the front-rear direction. Supported. And
The first connecting member 62 attached to the rear end of the shuttle shaft 60 and the second connecting member 63 attached to the front end of the drive shaft 58a of the shuttle drive motor 58 are interconnected. That is, the hook shaft 60 and the drive shaft 58a are connected to both connecting members 62, 6
3 are connected by a coupling 61. In this case, the shuttle shaft 60 and the drive shaft 58a which are connected by the coupling 61 and rotate integrally are referred to as a shuttle shaft member.

Here, the full rotary hook 59 will be briefly described. As shown in FIG. 25, the inner rotary hook 59 holds a bobbin case 67 for accommodating a bobbin, and the outer rotary hook 59a rotates outside the inner rotary hook. The outer hook 59a has an upper thread 4
7 for hooking 7 to form needle thread loop 47c
9b is formed. And, the main shaft 18 is approximately "200
° ”, the timing at which the sword tip 59b and the eye of the sewing needle 22 meet (see FIG. 21) is reached. At this timing, the sword tip 59b removes the needle-side upper thread 47 extending from the eye of the sewing needle 22. The upper thread loop 4 which is hooked and moves between the inner hook and the outer hook 59a by the rotation of the outer hook 59a.
7c is formed.

Further, a disk encoder 64 is attached to the second connecting member 63, and a plurality of slits formed in the disk encoder 64 are optically detected, and a photo sensor for outputting a shuttle shaft rotation signal is provided. The second
An encoder sensor 65 is mounted on the mounting block 56. Then, by driving the shuttle drive motor 58, the shuttle shaft 6 is driven via the drive shaft 58a and the coupling 61.
0 is rotationally driven, and the full rotary hook 59 is rotationally driven at a double rotational speed with respect to the sewing machine main shaft 17 in a predetermined rotational direction. Here, the front end of the bed unit 10 is covered with a protective cover 66 pivotally supported at the lower end of the front end of the bed case 50 via a hinge mechanism so as to be openable and closable.

Here, a brief description will be given of a pivot structure for pivotally supporting the rotary hook 59 so that the position of the rotary hook 59 can be adjusted in the front-rear direction. Immediately inside the cylindrical portion of the mounting block 56,
A cylindrical bearing case 70 is provided so as to be slidable in the front-rear direction, and a bearing 71 is press-fitted in the bearing case 70. And the mounting block 5
An eccentric pin 72 is attached to the left side wall portion 6, and a pin portion at the tip of the eccentric pin 72 is engaged with a vertically long pin hole formed in the left side wall of the bearing case 70. On the other hand, a set screw 73 to which the bearing case 70 can be fixed is detachably provided on the right side wall of the mounting block 56.

That is, while the set screw 73 is loosened,
By rotating the eccentric pin 72 clockwise or counterclockwise, the bearing case 7 is rotated through the pin hole.
0 can be moved forward or backward by a small distance (for example, 1 to 2 mm), and at the same time, the position of the rotary hook 59 can be finely adjusted in the front-rear direction, and the needle gap can be adjusted. Next, the upper thread 47 and the lower thread 48 are provided in each of the bed units 10 to 12.
The thread cutting mechanism 80 that cuts off the thread will be described with reference to FIGS.

A fixed plate (not shown) fixed to the mounting block 56 extends above the rotary hook 59. The movable plate 81 includes a movable blade 81 at a standby position indicated by a solid line and a maximum rotation indicated by a two-dot chain line. It is pivotally supported over the movement position. A fixed blade 82 for cutting the upper thread 47 and the lower thread 48 in cooperation with the movable blade 81 is attached to the lower side of the needle plate 52 immediately above the fixed plate with the blade portion facing forward. Have been.

The thread cutting operation lever 83 connected to the movable blade 81 extends backward through the inside of the bed case 50. That is, due to the forward movement of the thread cutting operation lever 83, the movable blade 81 rotates clockwise,
After moving forward to the maximum rotation position indicated by the two-dot chain line in FIG.
Is returning in the counterclockwise direction, the upper thread 47 and the lower thread 48 are engaged with the engaging portion 81a of the movable blade 81, and then the upper thread 47 is cooperated by the movable blade 81 and the fixed blade 82. And the lower thread 48 are cut at the same time.

Next, the thread cutting drive mechanism 85 for driving the thread cutting mechanism 80 will be described with reference to FIGS. The rear end of the thread cutting operation lever 83 is substantially L in a plan view and is pivotally attached to the rear end of the bed case 50 so as to be horizontally rotatable.
It is connected to a driven portion 86 a of a U-shaped rotating plate 86. On the other hand, at the left end of the base frame 1, the base frame 1
A thread cutting motor 88 is attached from below to a mounting plate 87 fixed to the
9 is provided with a stepped bolt 91
As a result, it is pivotally supported by the mounting plate 87.
Further, a base end of a plate-shaped connecting plate 92 is attached to the swinging member 90, and a left end of a thread cutting operation shaft 93 extending in the left-right direction is connected to a leading end of the connecting plate 92. I have.

The drive section 86b of the rotary plate 86 is connected to the thread cutting operation shaft 93. This allows
The swinging member 90 is rotated clockwise by a predetermined angle due to the counterclockwise rotation of the thread cutting motor 88, and the thread cutting operation shaft 93 is moved rightward by a predetermined distance via the connecting plate 92. As a result, the rotation plate 86 rotates clockwise, and the thread cutting operation lever 83 moves forward, and the movable blade 8
1 moves forward to the maximum rotation position. Thereafter, the clockwise rotation of the thread cutting motor 88 causes the turning plate 86 to rotate counterclockwise through the leftward movement of the thread cutting operation shaft 93, and the thread cutting operation lever 83 to move backward. To the upper thread 47 and the lower thread 4 engaged with the movable blade 81 as described above.
8 are simultaneously cut by the movable blade 81 and the fixed blade 82.

On the mounting plate 87 near the rocking member 90, a moving position detecting sensor 94 comprising a photo sensor is mounted.
Is provided with a shielding plate 95 for detecting and operating the movement position detection sensor 94. That is, the moving position detecting sensor 94 does not detect the shielding plate 95 when moving to the moving range from the cutting position of the movable blade 81 to the maximum turning position. While the signal DS is output, when the movable blade 81 has moved in the backward movement direction to the cutting position, the shield plate 95 is detected and the "H" level movement position detection signal DS is output.

Next, an outline of a control system of the multi-head embroidery sewing machine M will be described with reference to the block diagram of FIG. A sewing machine control device 100 that controls the entire embroidery sewing machine M other than the shuttle drive control includes a CPU 101, a ROM 102, and a RAM.
103, and an input interface (not shown) and an output interface (not shown) connected to the microcomputer via a bus such as a data bus.

A drive circuit 105 for the needle bar jump solenoid 41, a drive circuit 107 for the presser foot drive solenoid 106, and a thread break sensor 108 are connected to the sewing machine controller 100 with respect to the head unit 4. The other head units 5 and 6 are similarly connected. Further, the sewing machine control device 100 includes a sewing machine motor 1.
A driving circuit 111 for driving the motor 10 and a sewing machine motor 110
Encoder sensor 112 which outputs 1000 slit signals per rotation of a disk encoder provided in
A spindle origin sensor 113 for outputting one spindle origin signal per rotation of the first encoder sensor 112, and a stop position for detecting a stop position of the needle bar 21 (a rotational position of the sewing machine spindle 17 at about 100 °). Sensor 114 and needle bar case 2
A driving circuit 116 for a needle bar changing motor 115 for changing the needle bar 21 driven by moving the
And a drive circuit 120 for the Y-axis drive motor 119, and a plurality of switches for instructing sewing start and various commands, and an operation panel 18 provided with a display 18a. Are connected respectively.

On the other hand, it is connected to the sewing machine control device 100,
The hook shaft control device 150 that controls the drive of the rotary hook 59 and the thread cutting control includes a CPU 151, a ROM 152, and a RAM 1.
53, and an input interface (not shown) and an output interface (not shown) connected to the microcomputer via a bus such as a data bus. The shuttle shaft control device 150 includes a drive circuit 154 for the shuttle drive motor 58, a second encoder sensor 65 that outputs 50 slit signals in one rotation of the disk encoder 64, and a disk drive for the bed unit 10. A hook shaft origin sensor 155 that outputs one hook shaft synchronization signal with one rotation of the encoder 64 is connected to each of the other bed units 11,
12 is also connected in the same manner. Further, the shuttle shaft control device 150 is connected to a movement position detection sensor 94 and a drive circuit 156 for the thread cutting motor 88, respectively.

Here, the sewing machine motor 110 is formed of an induction motor, and is controlled by an inverter. The 1000 spindle rotation signals (slit signals) output from the first encoder sensor 112 in one rotation of the disk encoder provided in the sewing machine motor 110 are 40
The pulse is subdivided into 00 pulses and used as a spindle control pulse in drive control of the motor. On the other hand, the shuttle drive motor 58
It consists of a stepping motor and receives 1
Rotates, and at the same time, the rotary hook 59 also makes one rotation. The shuttle drive motor 58 is driven for two rotations while the sewing machine main shaft 17 makes one rotation.
In order to rotate, double speed (hereinafter referred to as hook shaft rotation speed K) drive control is performed.

Here, a power supply system for supplying power to the sewing machine motor 110 and the shuttle drive motor 58 will be described with reference to FIG. In addition to the drive circuit 111 for the sewing machine motor 110 and the drive circuit 154 for the shuttle drive motor 58, other drive circuits 105, 107, 116, 118, and 12
The power supply circuit 162 that supplies power to the rectifier circuit 16
1 is connected to a commercial power supply (AC power supply) 160.

The primary side for supplying alternating current to the rectifier circuit 161 has a power failure detection circuit 170 for detecting a power failure of the power supply.
Is provided, and a voltage drop detection circuit 180 for detecting a voltage drop of a power supply is provided on a secondary side for supplying a DC drive current from the rectifier circuit 161. An emergency capacitor, which is an emergency power supply that supplies power to the jump solenoid 41 via the drive circuit 105, is connected.

Next, the power failure detecting circuit 170 will be briefly described. The voltage dividing circuit 17 for dividing the AC voltage on the primary side is described below.
1, a timer (watchdog timer) 173 for generating a timer interrupt to the CPU 151 of the hook shaft control device 150 when the predetermined set time received from the hook shaft control device 150 has been reached, and a voltage dividing circuit from the voltage dividing circuit 171. And a comparator 172 that outputs a clear signal for clearing the set value of the timer 173 every time the divided voltage becomes higher than a predetermined value, that is, every AC cycle. . In other words, at the time of a power failure, the clear signal is not output from the comparator 172 to the timer 173, so that the count value of the timer 173 reaches the set time, and the timer 173 generates a timer interrupt at the time of the power failure from the hook shaft control device 150. .

On the other hand, the voltage drop detecting circuit 180 will be described briefly. A voltage dividing circuit 181 for dividing the DC voltage on the secondary side, and the divided voltage received from the voltage dividing circuit 181 is converted into a digital signal to convert the hook shaft. A / D output to control device 150
A converter 182 is provided. Here, a predetermined drive voltage is supplied from the control power supply circuit 163 to the shuttle shaft control device 150, the sewing machine control device 100, and a plurality of other electronic elements.

Next, the routine of the hook shaft drive control executed by the hook shaft control device 150 will be described with reference to FIGS.
9 will be described. Here, reference numerals Si (i = 9, 10, 11,...) In the figure indicate each step. Here, a signal output from the sewing machine control device 100 to the shuttle shaft control device 150 will be briefly described with reference to FIG.
7 is stopped at a rotation position of about "100 °", and the needle bar 21 jumps to the uppermost position by the needle bar jump mechanism 40 and stops. When the embroidery data having the needle drop data for N stitches is sewn, the main shaft drive signal from the sewing machine control device 100 is switched to the “H” level, and at the same time, the driving of the sewing machine motor 110 is started. Here, it is assumed that the embroidery data does not include thread trimming data for thread change, and embroidery sewing for N stitches is sequentially performed, and thread trimming is performed at the last Nth stitch.

In FIG. 21, the needle bar movement trajectory, the balance movement trajectory, the hook thread amount, and the rotation position of the full rotary hook 59 during sewing correspond to the rotation position of the sewing machine spindle 17. Shown respectively. However, the rotation position of the full rotary hook 59 is indicated by the rotation position (rotation angle) of the blade point 59b. By the way, at the first needle, the needle bar 21 is
At 0 °, that is, when the needle bar 21 is at the uppermost position, the needle bar 21 is automatically connected to the vertical movement member 27. Therefore, when the pull-in operation (picker operation) of the upper thread 47 at the start of sewing is not performed. A stitch is formed from the second and subsequent stitches. Then, at the last stitch of the Nth needle, when the sewing machine spindle 17 is at about “260 °”, the spindle drive signal is switched to the “L” level, a thread trimming signal is output, and then “270” of the sewing machine spindle 17 is output. ° to 440 ° (88 °) ”
The rotation of the sewing machine spindle 17 is actually stopped when the sewing machine spindle 17 is at “460 ° (100 °)” immediately after that.

When the power is supplied to the multi-head embroidery sewing machine M, this control is started, and first, a timer setting process control (see FIG. 11) for setting a set time in the timer 173 is executed (S9). When this control is started, first, a set time for generating a timer interrupt is set to 2.5 times the AC frequency ACt (S20). For example,
When the AC frequency ACt is “60 cycles”,
The set time “16 msec × 2.5” is set. Next, the count value of the timer 173 is cleared (S21),
The timer interrupt is permitted (S22), this control ends, and the process returns to S10 of the hook shaft drive control. Next, in the hook shaft drive control, the hook shaft origin search control (see FIG. 12).
Is executed (S10). When this control is started, first, a stop position signal from the stop position sensor 114 is read, and when the sewing machine main shaft 17 is at the stop position, that is, when the previous sewing process has been completed and the thread has been cut, usually "10" is set.
0 ° ”at the initial setting position. At this stop position (S25: YES), the rotation position of the hook shaft 60 is a rotation position of about 13 ° of the sewing machine main shaft 17, so that the rotation position when the hook shaft synchronization signal is output from the hook shaft origin sensor 155 is obtained. To return, the hook shaft control device 150
8 is permitted (S26).

Here, the count value I of the counter for counting the number of drive steps of the shuttle drive motor 58 is cleared (S27), and the shuttle drive motor 58 is driven forward by one pulse (S28). Then, the count value I is incremented by one (S29), and when the hook shaft synchronization signal is not input from the hook shaft origin sensor 155 (S30: N
O), it is determined whether or not the count value I is equal to or greater than a predetermined value (S31). That is, when S31 is executed, the hook shaft 6
Since the home position abnormality of 0 is detected, it functions as detecting means for detecting the home position abnormality of the hook shaft 60 (the hook shaft member). When the count value I is not equal to or greater than the predetermined value (S
31: NO), and S28 to S31 are repeatedly executed.
When the count value I is equal to or greater than the predetermined value (S3
1: YES), the hook shaft control device 150
8 is stopped (S32). Thus, the hook shaft 60
Is detected, the energization of the shuttle drive motor 58 is stopped, so that the rotary hook 59 (thread wheel catcher) is stopped.
Is easier to turn manually.

Then, an error message to that effect is displayed on the display 18a by the sewing machine control device 100 (S33), and the operator cancels the error display. The sewing machine control device 100 determines whether or not the error has been canceled (S34), and if the error display is not canceled (S34: NO), waits for the operator to cancel the display of the error message. After the display of the error warning is canceled (S34: YES), when the sewing machine main shaft 17 is at the stop position (S25: YES), the shuttle drive motor 58 is re-energized (S26), and the above-described mode is repeated to repeat the above-described manner. 6
Set the origin to 0. Thereafter, when the hook shaft synchronization signal is input while the count value I is within the predetermined value (S30: YE
S), the control of FIG. 12 is terminated, and
Return to The display 18a functions as a display unit that displays the detection result of the detection unit as an error warning. Further, after the hook shaft synchronization signal is not input when the count value I is within the predetermined value (S30: NO), S26 is executed again.
, And functions as an origin finding means for finding the origin of the hook shaft 60. Then, as shown in FIG. 20, when the shuttle shaft 60 has rotated to the initial setting position corresponding to the initial setting position “180 °” which is the rotation start position of the sewing machine main shaft 17 (S30: YES), this control is performed. Then, the process returns to S10 of the hook shaft drive control.

If the sewing machine main shaft 17 is not at the stop position (S25: NO), an error message to that effect is displayed on the display 18a by the sewing machine control device 100, and the operator manually rotates the sewing machine main shaft 17. To set the stop position. Next, in the hook shaft drive control, when the "H" level main shaft drive signal is not output from the sewing machine control device 100, that is, when sewing is not started (S25: NO),
This S11 is repeated and the process is on standby. Here, processing control during the standby processing will be described with reference to FIG. When the "H" level spindle drive signal is not output from the sewing machine control device 100 (see FIG. 20) (S130: NO), it is detected whether or not the shuttle shaft rotation signal is input from the second encoder sensor 65 (S131). ). In this case, unless the operator performs an operation of, for example, grasping and rotating the full rotary hook 59, the rotary shaft rotation signal is not detected (S
131: NO), S130, and S131 are repeated. Thereby, when S131 is executed, the hook shaft 60
(Hook shaft member) functions as a detecting means for detecting that the hook member has deviated from the standby position. Then, when the operator performs an operation of gripping and rotating the full rotary hook 59 during standby, the rotary shaft rotation signal is output from the second encoder sensor 65 (S131: YES), and the rotary shaft control device 150 The energization of the shuttle drive motor 58 is stopped (S132). Then, an error message to that effect is displayed on the display 18a by the sewing machine control device 100 (S13).
3) The operator cancels the error display. The sewing machine control device 100 determines whether the error has been released (S1).
34) When the error display is not canceled (S13)
4: NO), and waits for the display of the error message on the display 18a to be released (S134: YES). And FIG.
By returning to S10 of the hook shaft drive control after ending the control shown in (1), the control shown in FIG. When the sewing machine control device 100 outputs a "H" level spindle drive signal (see FIG. 20) at the start of sewing (S130: YES),
The sewing machine motor 110 is driven to rotate at the same time, and the sewing machine main shaft 17 is driven from the rotation position “100 °”.

Then, as shown in FIG. 22, at the first stitch after the start of sewing, when the sewing machine spindle 17 rotates to about “170 °” and the spindle synchronization signal is output from the spindle origin sensor 113 (S12). : YES), when the operation of pulling in the upper thread 47 to the lower side of the work cloth W is performed by a command from the sewing machine control device 100 (S13: YES), the upper thread pull-in process (see FIG. 13) is executed (S14). ). When the control of the upper thread pull-in process is started, a hook shaft synchronous drive process control (see FIG. 14) for rotating and driving the hook shaft 60 while synchronizing with the sewing machine main shaft 17 is executed (S36).
When this control is started, the first encoder sensor 112
The rotation position of the sewing machine spindle 17 is read by constantly counting the spindle rotation signal output from the controller (S4).
0) In order to synchronize with the rotation of the sewing machine main shaft 17, when it is the timing to drive the shuttle shaft 60 by one step (S41: YES), the shuttle drive motor 58 is rotationally driven by one step (S42).

Next, in order to confirm the rotation of the hook shaft 60,
The count value I of the counter that counts the number of drive steps of the shuttle drive motor 58 is incremented by one (S4
3) When the shuttle shaft rotation signal from the second encoder sensor 65 does not change (S44: NO), and when the count value I is equal to or smaller than the predetermined count value P (for example, 10 to 15) (S45: YES), The control is terminated, and the process returns to S31 of the upper thread pull-in process control. On the other hand, when the shuttle shaft rotation signal changes (S44: YES), the count value I is cleared (S46) because the shuttle shaft 60 is reliably driven, and the process returns to S31 similarly.

When it is not time to drive the hook shaft 60 (S41: NO), the hook shaft origin sensor 155
When the hook shaft synchronization signal is not input from (S47: N
O), the detection voltage Ks output from the A / D converter 182
Is read (S48), and when the detection voltage Ks is higher than a low set voltage Vs that hinders the driving of the sewing machine motor 110 or the shuttle drive motor 58 (S49: N
O), and return similarly. However, when the hook shaft synchronization signal is input (S47: YES), the sewing machine spindle 17
The data of the synchronous drive position table in which the allowable number of drive pulses of the shuttle drive motor 58 corresponding to the rotational position of the shuttle drive is stored in the ROM 152 in advance is stored in the ROM 152. Drive motor 5
When the shuttle shaft 60 is synchronously driven within the synchronization allowable range with respect to the sewing machine spindle 17 based on the number of drive pulses of No. 8 and the data of the synchronous drive position table (S50:
YES), and similarly returns to S31.

Here, the detection voltage Ks is
When the count value I is smaller than the predetermined count value P (S45: N), when the voltage is equal to or lower than the low set voltage Vs that hinders the driving of the shuttle drive motor 58 and the shuttle drive motor 58 (S49: YES).
O), or when the hook shaft 60 exceeds the allowable synchronization range with respect to the sewing machine main shaft 17, that is, when a synchronization deviation of a predetermined amount or more is detected and the synchronous driving is not performed (S50: N).
O), abnormality processing control (see FIG. 17) is executed (S5)
1). Thereby, when S50 is executed, it functions as detection means for detecting whether or not the sewing machine main shaft 17 and the hook shaft 60 (the hook shaft member) are out of synchronization by a predetermined amount or more.

Next, when the abnormality processing control shown in FIG. 17 is started, the needle bar jump solenoid 41 is driven for a predetermined time (S80). At this time, the needle bar jump solenoid 4 is connected from the capacitor C via the drive circuit 105.
1 is immediately supplied with power, so that the solenoid 41 operates quickly and reliably. As a result, as described above, the up-and-down moving member 27 rotates to the jump position, and the needle bar 21 jumps to the needle position at a stretch. Thereby, it is possible to reliably prevent the interference between the rotary hook 59 and the sewing needle 22 due to the synchronization deviation or the voltage drop of the power supply.

Next, a spindle drive stop command is output to the sewing machine controller 100 to stop the drive of the sewing machine motor 110 (S81). As a result, a brake operation signal is output from the sewing machine control device 100 to the drive circuit 111, and the sewing machine motor 110 is immediately stopped. At the same time, a drive stop process for outputting a brake operation signal is similarly performed on the drive circuit 154 (S8).
2) The shuttle drive motor 58 is immediately stopped. And
The sewing machine control device 100 stops the energization of the shuttle drive motor 58 (S83), so that the stationary torque of the shuttle drive motor 58 composed of a stepping motor can be reduced, and
To reduce the burden when manually rotating. Therefore, the full rotary hook 59 rotated by the hook drive motor 58 via the drive shaft 58a, the second connecting member 63 and the hook shaft 60.
Does not require a large force when the operator manually rotates, the manual operation of removing, for example, the upper thread 47 or the lower thread 48 entangled in the rotary hook 59 can be easily performed. Thus S
When the step 83 is executed, the power supply to the shuttle drive motor 58 is stopped, so that it functions as a power supply stopping unit. Next, a display command to display an error message indicating that the machine has stopped abnormally on the display 18a is output to the sewing machine control device 100 (S84). When the operator releases the abnormal state and releases the error state by operating the error release switch on the operation panel 18 (S8).
5: YES), this control is terminated, and S
It returns to 10.

When a power failure occurs, since the clear signal is not output from the comparator 172 to the timer 173 in the power failure detection circuit 170 as described above, the count value of the timer 173 reaches the set time and the timer 173 Then, a timer interrupt at the time of power failure occurs in the shuttle shaft control device 150. As a result, the abnormality processing control is executed, and the needle bar 21 jumps to the needle upper position at a stretch. As a result, the rotary hook 59 and the sewing needle 2 caused by the power failure
2 can be reliably prevented.

In the upper thread pulling-in process control (see FIG. 13), when the sewing machine main shaft 17 is not rotated to the rotation position of "280 °" (S37: NO), S is executed.
36 to S37 are repeatedly executed, and as shown in FIG. 20, when the sewing machine main shaft 17 is at the rotation position of “280 °” at the second stitch (S37: YES), the sewing machine main shaft 17 is set to “460 ° (100 °)), the driving of the hook driving motor 58 is stopped, and the rotation of the hook shaft 60 is forcibly stopped (S38: NO).

That is, when the main shaft 17 of the sewing machine
460 ° ”, when the second stitch is being sewn, the full rotary hook 59 is in the rotation position shown in FIGS.
This is a state in which the upper thread loop 47c engaged by the upper thread 9b is formed and cannot be disengaged from the full rotary hook 59, and a period during which the sewing needle 22 and the balance 23 are raised while the cloth is being fed. .

Thus, the upper thread 47a extending from the eye of the sewing needle 22 is pulled upward in accordance with the elevation of the sewing needle 22 and the balance 23. As a result, the upper thread end protruding above the work cloth W is inserted into the work cloth W and the needle hole 52a of the needle plate 52 and drawn into the rotary hook 59, and the upper thread loop 47 is pulled.
c is not substantially formed. Then, when the sewing machine main shaft 17 has reached the rotational position of “100 °”, that is, when the rotary hook 59 has reached the rotational position for timing the sewing machine main shaft 17 (S32: YES), the control is terminated.
The process returns to S15 of the hook shaft drive control, and actual sewing is started.

Then, in the hook shaft drive control, a sewing process control (see FIG. 15) is executed (S15). When this control is started, when the spindle drive signal from the sewing machine control device 100 is at the “H” level and the sewing is being performed (S5
5: YES) As described above, the hook shaft synchronous drive process control is performed from the third stitch to the final N-th stitch, ie, until the main shaft drive signal becomes “L” level and the sewing process is completed. The sewing operation is repeatedly performed, and the sewing operation is sequentially performed for each stitch (S56). Then, when the final N-th stitch sewing operation is performed and a “L” level spindle drive signal is input (S55: NO), this control is terminated.
The process returns to S16 of the hook shaft drive control.

In the shuttle shaft drive control, when the thread is not cut by a command from the sewing machine control device 100 at the time of the last stitch (S16: NO), the sewing machine main shaft 1
The hook shaft synchronous drive process control is executed until 7 becomes “360 °” (S18, S19: NO), and the blade point 59b is
2 so that the main shaft 17 of the sewing machine is “360 °”.
Is reached (S19: YES), S1
Return to 0. On the other hand, when performing thread cutting (S16:
YES), the sewing thread end remaining thread securing process control (see FIG. 16) is executed (S17). At this time, the thread cutting process is executed from the rotation position of “270 °” of the sewing machine spindle 17 substantially simultaneously with the sewing end upper thread remaining amount securing process control. It will be described later.

Next, when the remaining amount securing process control for securing the remaining amount of the upper thread from the eye of the sewing needle 22 is started, as shown in FIG. 24, during the sewing operation of the final Nth needle, Until the sewing machine spindle 17 reaches the rotation position of “300 °”,
The hook shaft synchronous driving process is executed while rotating the hook shaft 60 at a predetermined rotation speed K (S60, S61: NO). Then, when the sewing machine main shaft 17 reaches “300 °” (S61: YES), the driving of the shuttle drive motor 58 is temporarily stopped until the sewing machine main shaft 17 reaches “335 °”. Forcibly suspend the rotation (S6
2: NO).

That is, when the sewing machine main shaft 17 is at "300 ° to 335 °" during the sewing of the Nth needle, the full rotary hook 59 is at the rotational position shown in FIGS.
This is a state in which the upper thread loop 47c is formed maximally and cannot be disengaged from the rotary hook 59, and a period in which the sewing needle 22 and the balance 23 are raised while the cloth is being fed. At this time, the upper thread 47a extending from the eye of the sewing needle 22 is continuous with the work cloth W. During this period, the rotation of the rotary hook 59 is temporarily stopped. The amount is fed from a thread spool not shown.

Accordingly, when the thread is cut by a thread cutting operation described later, a sufficient amount of the upper thread remaining to prevent the upper thread end from coming off from the eye hole at the start of the next sewing operation is obtained.
It is secured in accordance with the amount of thread unwound from the thread spool. When the main shaft 17 of the sewing machine has reached "335" (S62: YES), in steps S63 to S76, the shuttle motor 58 is rotated over the rotation period in which the main shaft 17 is rotated by approximately "38". The upper thread loop 47c is quickly removed from the entire rotary hook 59 by controlling the drive so that the rotational speed becomes high in proportion to the rotational speed of the main shaft 17 and does not exceed the self-starting frequency. The quantity is stabilized.

That is, the main shaft 17 of the sewing machine is set at "335 °".
, The shuttle drive motor 58 is driven to rotate at the predetermined rotation speed K for the first ten pulses (S63 to S63).
S64: YES), and then the driving pulse cycle is K = 1.5
(S65), the shuttle drive motor 58 is driven to rotate at the rotation speed of 1.5 K for the next 10 pulses (S66 to S67: YES), and then the drive pulse cycle is K = 2. (S68), and the next 14
The shuttle drive motor 58 is driven to rotate at a rotation speed of 2K for one pulse (S69 to S70: YES).

Then, the drive pulse cycle is set so that K = 1.5 (S71), and the shuttle drive motor 58 is driven to rotate at a rotation speed of 1.5K for the next 10 pulses (S72 to S73). : YES), and then the drive pulse cycle is set to be K = 1 (S74), and the next 10
The shuttle drive motor 58 is driven to rotate at the rotation speed K by the number of pulses (S75 to S76: YES), this control ends, and the process returns to S10 of the shuttle shaft drive control. Next, a description will be given of the thread cutting process control executed simultaneously with the upper thread remaining amount securing process with reference to FIGS.

Incidentally, this cutting process control is included in the thread cutting control executed in parallel with the above-described shuttle shaft drive control when the power is turned on. First, the thread cutting control will be described. When the power is supplied to the multi-head embroidery sewing machine M, this control is started, and first, S90 to S9
By 8, the initial setting of the movable blade 81 is executed. That is, the movement position detection signal D from the movement position detection sensor 94
When S is at the “H” level, that is, when the shielding plate 95 is detected and the movable blade 81 is at the cutting position (S90: YES),
As the flag data of the drive direction flag DF of the thread cutting motor 88, "1" indicating the forward movement direction is set (S9).
1) The thread trimming motor 88 is driven one pulse at a time until the movement position detection signal DS becomes "L" level, that is, until the movable blade 81 is rotated by a predetermined amount from the cutting position in the forward movement direction (S92). , S93).

When the movement position detection signal DS becomes "L" level (S93: NO), the thread trimming motor 88 is driven by an additional 5 pulses, and the movable blade 81 is further moved in the forward direction by a small amount. It is rotated by a fixed amount (S94). Next, as the flag data of the drive direction flag DF of the thread trimming motor 88, "0" indicating the return direction is set (S95), and until the movement position detection signal DS becomes "H" level, that is, the movable blade The thread trimming motor 88 is driven one pulse at a time until 81 returns to the cutting position (S9).
6, S97). Then, the movement position detection signal DS becomes “H”.
When the level reaches the level (S97: YES), the thread trimming motor 88 is additionally driven by an additional 5 pulses, and the movable blade 81 is further rotated by a minute predetermined amount in the backward movement direction (S).
98).

Then, "H" is output from the sewing machine control device 100.
(S99: YE)
S), and repeats steps S99 and S100 until a thread trimming signal is received from the sewing machine control device 100. On the other hand, in the final sewing operation of the Nth needle, the sewing machine main shaft 17 is set to about "2".
When the thread cut signal is received at the rotational position of “60 °” (S100: YES), the cutting process control (see FIG. 19) is executed (S101). When this control is started and the sewing machine spindle 17 has reached the rotation position of “270 °” (S110: YES), the drive direction flag DF is set (S111), and as shown in FIG. Is counted for "11" pulses, and the thread trimming motor 8
Driving 8 by one pulse is repeatedly executed for 20 pulses (S112 to S113).

When the thread trimmer motor 88 has been driven for 20 pulses (S113: YES), the main shaft control pulse is counted for "4" pulses, and the thread trimmer motor 88 is turned on.
The pulse driving is repeatedly executed for 27 pulses (S114 to S115). Further, when the thread trimming motor 88 is driven for 27 pulses (S115: YE
S) The operation of counting the spindle control pulses for “2” pulses and driving the thread trimming motor 88 by one pulse is repeatedly executed for 121 pulses (S116 to S117). That is, when driving the last 121 pulses,
The upper thread 47 is separated from the bifurcated thread guide portion 59c (see FIG. 25) formed at a portion of the outer periphery of the rotary hook 59 that faces the sword tip 59b.
And the lower thread 48 and the upper thread 47b on the work cloth side
Divided by

When the thread cutting motor 88 is driven for 121 pulses, as shown in FIG.
1 is a state in which the lower thread 48 and the upper thread 47b on the work cloth side can be engaged with each other, and the lower thread 48 has moved to its maximum rotation position. Here, in FIG. 27, for convenience of explanation, the upper thread (needle thread) from the sewing needle 22 on the horizontal plane where the movable blade 81 is located
47a, an upper thread 47b connected to the work cloth W, and a lower thread 48.

Next, in this state, the thread trimmer motor is rotated up to a rotation position of "335 °" of the sewing machine spindle 17, which is a timing for rotating the shuttle shaft 60 at a high rotation speed proportional to the rotation speed of the sewing machine spindle 17. 88 is stopped (S1
18: NO), when the sewing machine main shaft 17 reaches the rotation position of “335 °” (S118: YES), the movable blade 81
The drive direction flag DF is reset in order to move back the motor (S119), and the main shaft control pulse is counted for "3" pulses to drive the thread trimming motor 88 by one pulse.
It is repeatedly executed for 00 pulses (S120 to S12
1). At this time, the lower thread 48 and the upper thread 47b on the work cloth side are engaged with the engaging portion 81a of the movable blade 81.

Further, when the thread trimming motor 88 is driven by 100 pulses (S121: YES), the main shaft control pulse is counted for "14" pulses and the thread trimming motor 88 is driven by one pulse. It is repeatedly executed until DS becomes "H" level (S12).
2 to S123). Here, at the end of the driving period for 100 pulses of the thread cutting motor 88, the movable blade 81 and the fixed blade 82 are moved at the timing indicated by the one-dot chain line in FIG.
The upper thread 47 and the lower thread 48 are cut at the same time by the cooperation of. Further, the thread cutting motor 88 is further driven by an additional 5 pulses, and the movable blade 81 is further rotated in the backward direction by a predetermined small amount (S124 to S125).

If the motor is rotated by an extra amount of 5 pulses (S125: YES), the movable blade 81 has been initialized, and this control is terminated to return to S9 of the thread cutting control.
Then, as described above, the process waits for the input of the next thread trimming signal. At this time, as shown in FIG. 28, the movable blade 81 has moved forward to the original standby position, and the ends of the cut upper thread 47 and lower thread 48 are provided below the fixed blade 82. It is held by a thread holding unit (not shown).

That is, as shown in FIGS. 24 and 26,
The thread cutting timing is such that the rotary hook 59 is driven to rotate at a high speed in proportion to the rotation speed of the sewing machine spindle 17 and the sewing machine spindle 1 is rotated.
When the upper thread loop 47c is quickly removed from the full rotary hook 59 at a substantially predetermined rotation position of 7, the variation in the timing at which the upper thread loop 47c comes off the full rotary hook 59 is reduced, and the upper thread loop 47c is secured after cutting. The amount of remaining yarn can be stabilized. Further, the upper thread remaining amount secured at this time is a sufficient thread amount to reliably prevent the end of the upper thread from coming out of the eye of the sewing needle 22 at the start of the next sewing operation. I have.

In the above multi-head embroidery sewing machine M, for example, in the hook shaft synchronous drive processing control for executing the sewing operation for each stitch, a predetermined abnormality of the sewing machine M, for example, the hook drive motor 58
Drive the second encoder sensor 6
When the hook shaft rotation signal from 5 does not change, or when the hook shaft 6
0 is out of the allowable synchronization range with respect to the sewing machine main shaft 17, and when a synchronization deviation of a predetermined amount or more is detected, when an abnormality of origin search of the hook shaft 60 is detected, or when the hook shaft 60 rotates during standby. When this is detected, the energization of the shuttle drive motor 58 that drives the shuttle shaft 60 is stopped, so that it becomes easy to manually rotate the full-rotation hook 59 (thread wheel catcher). For example, the burden of removing the entangled thread or the like can be reduced.

Further, when the detection voltage Ks is
0 or a low set voltage Vs or lower that hinders the driving of the shuttle drive motor 58, that is, when the voltage drop is equal to or higher than a predetermined value, the needle bar 21 is similarly forcibly jump-operated to the needle-up position. , The rotary hook 59 caused by the voltage drop of the power supply
And the sewing needle 22 can be reliably prevented. Further, at the time of a power failure, the count value of the timer 173 is not cleared.
When a timer interrupt occurs during a power failure, the needle bar 21
Is forcibly jumped to the needle upper position, so that interference between the rotary hook 59 and the sewing needle 22 due to a power failure can be reliably prevented.

Also, during execution of the hook shaft synchronous drive processing control,
When synchronization deviation of the hook shaft 60 with respect to the sewing machine main shaft 17 by a predetermined amount or more is detected, the detection voltage Ks is changed to the set voltage Vs.
In the following cases, when the voltage drop is equal to or more than a predetermined value, and at the time of a power failure, the needle bar 21 is forcibly jumped to the needle-up position each time, so that it may be caused by a synchronization deviation or a voltage drop. In addition, the interference between the rotary hook 59 and the sewing needle 22 caused by the power failure and the power failure can be reliably prevented. Furthermore,
When these abnormalities occur, the drive circuit 1
Since the power is immediately supplied to the needle bar jump solenoid 41 via 05, the solenoid 41 operates quickly and reliably.

It should be noted that the sewing machine main shaft 17 is configured to be synchronously controlled with the shuttle shaft 60, or a reference synchronization signal composed of a reference pulse train is output from either one of the two control devices 100 and 150, and the sewing machine motor is controlled. It is also possible to configure so that the synchronous control of the hook 110 and the shuttle drive motor 58 is performed based on the reference synchronization signal. The power failure detection circuit 170 and the voltage drop detection circuit 180 are merely examples, and may be configured by combining various electronic elements and electronic circuits, or may incorporate the capacitor C into the drive circuit 105 that drives the solenoid 41. , Sewing machine motor 1 that rotates by inertia during power outage
10 or the regenerative current generated from the shuttle drive motor 58 to drive the solenoid 41, or to make the needle bar 21 jump when the drive of the solenoid 41 is stopped during a power failure. Regarding the embodiment,
Various changes may be made based on existing techniques or techniques obvious to those skilled in the art. As the sewing machine motor 110 and the shuttle drive motor 58, other than the stepping motor,
For example, induction motors, AC servomotors, etc.
Various motors may be applied, and it is a matter of course that the present invention can be applied to various sewing machines provided with one embroidery sewing machine and configured to drive the thread catcher independently of the sewing machine motor. . In addition, “stop the energization of the shuttle drive motor 58”
In this case, the current applied to the shuttle drive motor 58 is not necessarily limited to zero.
Control such as reducing the applied current so that it is easy to rotate 0 or the like may be adopted. In addition, the predetermined abnormality of the sewing machine is a synchronization deviation between the sewing machine main shaft 17 and the shuttle shaft 60 by a predetermined amount or more, an abnormality detection of the origin search of the shuttle shaft 60,
The hook shaft 60 may be other than disengagement from the standby position.

[0076]

According to the first aspect of the present invention, a sewing machine motor for driving a needle bar on which a sewing needle is mounted via a main shaft of a sewing machine, and a thread catcher for catching a thread wheel in cooperation with the sewing needle are rotated. A sewing machine that controls a shuttle drive motor and a sewing machine motor so that the shuttle shaft member to be driven is provided with a shuttle drive motor that drives independently of the sewing machine spindle, and the thread wheel catcher rotates in synchronization with the sewing machine spindle. A detection unit that detects a predetermined abnormality of the sewing machine; and a stop unit that stops energization of the shuttle drive motor when the predetermined abnormality is detected by the detection unit. If
The energization to the hook drive motor that drives the hook shaft material is stopped. This makes it easy to manually rotate the yarn catcher without performing complicated operations, and reduces the burden when performing operations such as removing entangled yarn from the yarn catcher and other operations. Can be reduced.

In the sewing machine according to the second aspect, a sewing machine motor for driving a needle bar on which a sewing needle is mounted via a sewing machine main shaft, and a shuttle for rotating a thread catcher for catching a thread wheel in cooperation with the sewing needle. A hook drive motor that drives the shaft member independently of the sewing machine spindle; and a sewing machine that controls the shuttle drive motor and the sewing machine motor so that the thread catcher rotates in synchronization with the sewing machine spindle. Detection means for detecting a synchronization shift of a predetermined amount or more with the hook shaft member, and stopping means for stopping the energization to the shuttle drive motor when the detection of the synchronization shift of a predetermined amount or more. With this configuration, when the sewing machine main shaft and the shuttle shaft member are out of synchronization by a predetermined amount or more, the power supply to the shuttle drive motor that drives the shuttle shaft member is stopped. As a result, without performing complicated operations,
It becomes easy to rotate the yarn catcher manually, and the burden of removing, for example, entangled yarn from the yarn catcher and other operations can be reduced.

In the sewing machine according to the third aspect, a sewing machine motor for driving a needle bar on which a sewing needle is mounted via a main shaft of the sewing machine, and a shuttle for rotating a thread catcher for catching a thread wheel in cooperation with the sewing needle. A sewing machine drive motor that drives the shaft member independently of the sewing machine spindle; and a sewing machine that controls the shuttle drive motor and the sewing machine motor so that the thread catcher rotates in synchronization with the sewing machine spindle. Since there is provided a detecting means for detecting an abnormality of the origin of the shaft material, and a stopping means for stopping the energization to the shuttle drive motor when the abnormality of the origin of the shuttle shaft member is detected by the detecting means, If the origin of the hook shaft is not properly determined, the power supply to the hook drive motor that drives the hook shaft is stopped. Thereby, it becomes easy to manually rotate the yarn catcher without performing complicated operations, and for example, an operation of removing a tangled thread or the like from the yarn catcher,
When performing other operations, the burden can be reduced.

In the sewing machine according to the fourth aspect, a sewing machine motor for driving a needle bar on which a sewing needle is mounted via a main shaft of the sewing machine, and a shuttle for rotating a thread catcher for catching a thread wheel in cooperation with the sewing needle. A sewing machine drive motor that drives the shaft member independently of the sewing machine spindle; and a sewing machine that controls the shuttle drive motor and the sewing machine motor so that the thread catcher rotates in synchronization with the sewing machine spindle. Detecting means for detecting that the shaft has deviated from the standby position, and stopping means for stopping the energization of the shuttle driving motor when the detecting means detects that the hook shaft has deviated from the standby position. When the shuttle shaft member comes off the standby position, the power supply to the shuttle drive motor for driving the shuttle shaft member is stopped. This makes it easy to manually rotate the yarn catcher without performing complicated operations, and reduces the burden when performing operations such as removing entangled yarn from the yarn catcher and other operations. Can be reduced.

In the sewing machine according to the fifth aspect of the present invention, the display means for displaying the detection result of the detection means as an error warning is provided. Work to remove thread and the like, and other work can be performed.

In the sewing machine according to the present invention, after the error warning displayed on the display means is released, the shuttle drive motor is re-energized, and an origin finding means for finding the origin of the shuttle shaft member is provided. Therefore, when the origin of the hook shaft member is determined by re-energizing the hook drive motor, the sewing machine waits for the start of sewing, thereby improving the efficiency of sewing work.

[Brief description of the drawings]

FIG. 1 is a perspective view of a multi-head embroidery sewing machine.

FIG. 2 is a schematic perspective view of a needle bar vertical movement mechanism including a needle bar jump mechanism.

FIG. 3 is a plan view of a main part showing a work table and a bed unit.

FIG. 4 is a partial plan view of a bed unit provided with a shuttle module.

FIG. 5 is a partial vertical sectional side view of a bed unit provided with a shuttle module.

FIG. 6 is a partially enlarged plan view of a distal end portion of the bed unit.

FIG. 7 is an enlarged plan view of the thread cutting drive mechanism.

FIG. 8 is a block diagram of a control system of the multi-head embroidery sewing machine.

FIG. 9 is a block diagram of a power supply system of the multi-head embroidery sewing machine.

FIG. 10 is a schematic flowchart of a shuttle shaft drive control routine.

FIG. 11 is a schematic flowchart of an interrupt timer setting process control routine;

FIG. 12 is a schematic flowchart of a routine for controlling spindle / hook shaft initial setting processing.

FIG. 13 is a schematic flowchart of a needle thread pull-in process control routine.

FIG. 14 is a schematic flowchart of a shuttle shaft synchronous drive processing control routine.

FIG. 15 is a schematic flowchart of a sewing process control routine.

FIG. 16 is a schematic flowchart of a routine of a sewing end remaining thread securing process control at the end of sewing.

FIG. 17 is a schematic flowchart of an abnormality processing control routine.

FIG. 18 is a schematic flowchart of a thread trimming control routine.

FIG. 19 is a schematic flowchart of a cutting process control routine.

FIG. 20 is a time chart of various signals output regarding sewing of embroidery data for N stitches.

FIG. 21 is an explanatory diagram showing the movement curve of the needle bar and the balance, the curve of the yarn amount of the hook thread, and the rotation position of the full rotary hook corresponding to the rotation position of the main shaft.

FIG. 22 is a diagram showing the hook shaft rotation speed with respect to the rotation of the main shaft at the start of sewing.

FIG. 23 is a front view of the full rotary hook temporarily stopped when the main shaft is at about “280 °”.

FIG. 24 is a diagram showing a shuttle shaft rotation speed with respect to rotation of a main shaft during thread cutting.

FIG. 25 is a front view of the full rotary hook temporarily stopped when the main shaft is at about “300 °”.

FIG. 26 is a diagram showing the number of drive pulses of the thread trimming motor with respect to the rotation of the main shaft.

27 is a diagram corresponding to FIG. 6, in which the movable blade moves forward to the maximum rotation position and can engage with both the upper and lower yarns.

FIG. 28 is a diagram corresponding to FIG. 6, in which the movable blade has returned to the standby position and cuts both upper and lower yarns.

FIG. 29 is a schematic flowchart of a control routine when the shuttle shaft is rotated during standby of the spindle.

[Explanation of symbols]

 M Multi-head embroidery sewing machine 17 Sewing machine spindle 21 Needle bar 22 Needle bar 40 Needle bar jump mechanism 41 Needle bar jump solenoid 55 Hook module 58 Hook drive motor 59 Full rotation hook 60 Hook shaft 110 Sewing motor 150 Hook shaft control device 170 Power failure detection circuit 180 Voltage drop detection circuit C Capacitor W Work cloth

 ──────────────────────────────────────────────────続 き Continued from the front page F term (reference) 3B150 AA01 AA07 AA15 AA18 CA04 CA05 CA08 CB04 CE01 CE09 CE18 CE20 DB09 DG03 GD03 GD14 GF02 GF03 GG04 JA02 JA07 JA08 JA11 LA19 LA53 LA82 LA84 LA88 LA90 LB01 MA16 MA17 NA18 NA48 NA77 NC02 NC06 NC07 NC11 PA03 QA03 QA04 QA06 QA07

Claims (6)

[Claims] 1. A sewing machine comprising: a sewing machine motor for driving a needle bar on which a sewing needle is mounted via a sewing machine spindle; and a shuttle shaft member for rotating a thread wheel catcher for catching a thread wheel in cooperation with the sewing needle. A sewing machine drive motor that is driven independently of the sewing machine. The sewing machine controls the shuttle drive motor and the sewing machine motor so that the thread catcher rotates in synchronization with the sewing machine main shaft. A sewing machine comprising: a detecting means for detecting a predetermined abnormality detected by the detecting means; and a stopping means for stopping the energization to the shuttle drive motor when a predetermined abnormality is detected by the detecting means. 2. A sewing machine comprising: a sewing machine motor for driving a needle bar on which a sewing needle is mounted via a sewing machine spindle; and a shuttle shaft member for rotating a thread catcher for catching a thread wheel in cooperation with the sewing needle. And a shuttle drive motor that is driven independently of the sewing machine. The sewing machine controls the shuttle drive motor and the sewing machine motor so that the thread catcher rotates in synchronization with the machine spindle. Detection means for detecting a synchronization shift of a predetermined amount or more with the stop means, and stopping means for stopping the power supply to the shuttle drive motor when the detection of the synchronization shift of a predetermined amount or more is detected by the detection means. Sewing machine. A sewing machine motor for driving a needle bar, on which a sewing needle is mounted, via a sewing machine main shaft; And a shuttle drive motor that is driven independently of the sewing machine. A sewing machine comprising: detecting means for detecting an abnormality; and stopping means for stopping energization to the shuttle drive motor when the detecting means detects an abnormality in origin search of the shuttle shaft member. A sewing machine motor for driving a needle bar, on which a sewing needle is mounted, via a sewing machine spindle; A sewing machine driving the hook drive motor and the sewing machine motor so that the thread catcher rotates in synchronization with the main shaft of the sewing machine. Detecting means for detecting that the hook shaft has come off from the standby position, and stopping means for stopping power supply to the hook driving motor when the detecting means detects that the hook shaft member has deviated from the standby position. Sewing machine. 5. The sewing machine according to claim 1, further comprising display means for displaying a detection result of the detection means as an error warning. 6. An origin locating means for re-energizing the shuttle drive motor after the error warning displayed on the display means is released, and for locating the origin of the shuttle shaft member. The sewing machine according to claim 5, wherein: