JPH09155089A - Automatically lower thread-supplying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the trouble of entangling threads in advance by protecting devices consisting of an automatic lower thread supplying device when a power source is cut off and to reduce loss time and the stricting time of operator when the power supply is cut off while a lower thread is wound. SOLUTION: The operations of respective devices 160-162 are always monitored by a power source electrification controller 450, when a sewing machine power source switch 302 is turned off, the prescribed processing operations are continued until being completed, the trouble of entangling threads is prevented, and power supply can be arbitrarily cut off. When either the off of sewing machine power source switch 302 or the on of lower thread winding stop switch 309 is detected at the time of processing operation due to the lower thread winding device 162, and the processing operation of lower thread winding device 162 is immediately stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic bobbin thread feeder.

[0002]

2. Description of the Related Art In a sewing machine for sewing using an upper thread and a lower thread, particularly for an industrial sewing machine which performs high-speed sewing work, it is necessary to frequently replace a bobbin wound with a lower thread. There is. Generally, when the bobbin thread is consumed or the remaining amount is low, the sewing machine operation is temporarily stopped, the bobbin case is removed from the hook, the bobbin residual thread is removed, and the bobbin thread is wound around the bobbin. Re-accommodates the newly wound bobbin in the bobbin case, hooks the wound bobbin thread on the bobbin case, cuts the bobbin thread derived from this bobbin case with a predetermined length, and cuts this bobbin case. A series of operations, which is mounting in the pot, is performed manually.

However, such a manual removal operation of the residual thread, a bobbin winding operation on the bobbin, a thread hooking operation, a thread cutting operation and a bobbin case replacement operation are extremely inefficient and cause a decrease in productivity. Has become. Therefore, the applicant of the present application, in Japanese Patent Application Laid-Open No. 7-68071, etc., has automatically performed the above-mentioned residual thread removing work, bobbin winding work, thread hooking work, thread cutting work and bobbin case replacement work. And proposes an automatic bobbin thread feeder.

This automatic bobbin thread supplying device is equipped with a bobbin exchanging device for gripping a bobbin case accommodating a bobbin and moving along a predetermined path, and removing residual thread of the bobbin accommodated in the bobbin case. Residual thread removing device, bobbin thread from a bobbin thread supply source is inserted from the bobbin case opening, and the bobbin is driven to rotate to wind the bobbin thread around the bobbin in the bobbin case. And a thread hooking device for hooking the lower thread drawn from the opening of the bobbin case and rotating the circumference of the bobbin case so that the lower thread wound around the bobbin is drawn from a predetermined position of the bobbin case. The bobbin case has a thread cutting device that cuts a lower thread drawn from a predetermined position while leaving a predetermined length.

In the automatic bobbin thread feeder, first, the bobbin case in which the bobbin thread has been consumed is taken out from the bobbin by the bobbin exchanging device and conveyed to the residual thread removing position. After the residual thread of the bobbin is removed by the residual thread removing device, the bobbin is conveyed to the bobbin winding position, where a new bobbin thread is wound around the bobbin by the bobbin winding device, and the new bobbin thread is newly wound. The bobbin thread guided from the bobbin case is threaded on the bobbin case by the thread hooking device, and the bobbin thread drawn from the bobbin case is cut by the thread trimming device. By this, it is conveyed to the hook side and mounted in the hook. That is, the series of operations described above is automatically executed.

[0006]

However, in such a bobbin thread automatic feeding device, if the power is cut off (the sewing machine power switch is turned off) during the operation of each device, the thread will start at the next operation. There is a fear of causing problems such as entanglement. Here, since the automatic bobbin thread feeder is arranged, for example, inside the bed of the sewing machine, the operating state of each device is considered to be invisible or hard to see by the operator. Therefore, it is difficult to determine whether or not each device is operating, that is, whether or not the power can be shut down. You have to wait until it turns off and shut down the power.

Therefore, the applicant of the present invention filed Japanese Patent Application No.
The above-mentioned problems are solved in the specification of No. 66871 and the specification of Japanese Patent Application No. 7-150866. Japanese Patent Application No. 7-
The automatic bobbin thread feeder described in Japanese Patent No. 66871 is configured to constantly monitor the operation of each of the above-mentioned devices, complete the processing operation of the device in the middle of operation when the power switch is cut off, and enter the standby state. Or, Japanese Patent Application No. 7-150
In the automatic bobbin thread feeder described in Japanese Patent No. 866, the operation of each of the above-mentioned devices is constantly monitored, and the processing operation of the device in the middle of operation when the power switch is cut off is completed, and then this processing operation is performed. If there is a necessary processing operation before the bobbin replacement, which is scheduled to be performed, the processing operation is sequentially completed and put into a standby state. That is, in any of the bobbin thread automatic feeders, when the power switch is cut off, the predetermined processing operation is continued, and then the standby state is set (the predetermined processing operation is continued until it is completed). Therefore, even if the power is cut off during the operation of each device, there is no fear of causing a trouble such as thread entanglement, and the power can be cut off arbitrarily.

However, the above-mentioned Japanese Patent Application No. 7-66871.
The automatic bobbin thread feeder described in Japanese Patent Application No. 7-150866 and Japanese Patent Application No. 7-150866 also had the following problems. That is, even if an operator mistakes, for example, a thread having an incorrect thread type, thread count, or thread color is used as the bobbin thread supply source, the bobbin thread winding operation by the bobbin thread winding device is completed ( In the device described in Japanese Patent Application No. 7-150866, the subsequent operation is further executed), but the bobbin winding operation takes a relatively long time compared to other processing operations and Since it takes time to completely remove the bobbin thread wound by the completion of the thread winding operation, there is a problem that the loss time becomes long.

Further, when the power switch is cut off, a predetermined processing operation is continued and then a standby state is entered, so that the operator can leave the place immediately without monitoring until the processing is completed. However, the operator tends to wait for the device to stop, and therefore, in the bobbin winding operation, which requires a relatively long time to complete the processing operation, the operator is restrained for a long time in place, for example, moving to another work. There were problems such as being late and hindering people from coming home.

In view of the above, the present invention protects a device constituting an automatic bobbin thread feeder at the time of power interruption, avoids troubles such as thread entanglement in advance, and causes a loss time when the power is interrupted during winding of the bobbin thread. Another object of the present invention is to provide an automatic bobbin thread feeder which can reduce the operator restraint time.

[0011]

In order to achieve the above object, an automatic bobbin thread feeder according to a first aspect of the present invention provides a residual thread removing device for removing a residual thread of a bobbin and a bobbin thread from a lower thread supply source. A bobbin winding device that can be wound on a bobbin, and a thread hooking device that can hook the bobbin wound on a bobbin to a bobbin case,
A thread cutting device capable of cutting the bobbin wound on the bobbin with respect to the bobbin supply source, and a bobbin exchange capable of moving the bobbin case accommodating the bobbin between the hook position and the processing operation position of each device. An automatic bobbin thread supplying device provided with at least a bobbin winding device and one of the other devices, constantly monitors the operation of the device, and when the sewing machine power is turned off,
A power supply energization control device is provided which, while continuing a predetermined processing operation, stops the processing operation of the bobbin thread winding device immediately when the sewing machine power supply is detected to be off during the processing operation of the bobbin thread winding device.

According to the automatic bobbin thread feeder of the first aspect, the operation of the device constituting the automatic bobbin thread feeder is constantly monitored by the power supply energization control device, and when the sewing machine power is turned off, a predetermined operation is performed. Since the processing operation is continued until the completion, the trouble such as the thread entanglement can be prevented and the power can be arbitrarily cut off, while if the turning off of the sewing machine is detected during the processing operation by the lower thread winding device. Since the processing operation of the bobbin winding device is immediately stopped, for example, when an incorrect thread of the thread type, thread count, or thread color is used as a bobbin thread supply source by an operator error,
Immediately after being rewound, the removal operation will be performed in a shorter time than when it has all been wound.For example, when moving to another work or going home, the operator is restrained on the spot. Disappear.

In order to achieve the above object, an automatic bobbin thread feeder according to a second aspect of the present invention is capable of winding a bobbin from a bobbin and a residual thread removing device for removing a bobbin residual thread. Bobbin winding device, a bobbin wound bobbin threading device capable of hooking a bobbin case on the bobbin case, and a bobbin wound bobbin thread capable of being cut to a bobbin thread supply source. A bobbin thread having at least a bobbin winding device and another one of a cutting device and a bobbin exchanging device capable of moving a bobbin case accommodating a bobbin to a shuttle position and a processing operation position of each device. In the automatic feeding device, the operation of the device is constantly monitored, and when the sewing machine power is turned off, the predetermined processing operation is continued until it is completed, while the bobbin winding stop switch is turned on during the processing operation of the bobbin winding device. If the bobbin winding is detected, With a power energization control device which immediately stops the location of the processing operation.

According to the automatic bobbin thread feeder of the second aspect, the operation of the device constituting the automatic bobbin thread feeder is constantly monitored by the power supply energization control device, and when the sewing machine power is turned off, a predetermined operation is performed. Since the processing operation is continued until it is completed, problems such as yarn entanglement can be prevented and power can be cut off arbitrarily, while the lower thread winding operation is stopped midway during the processing operation by the lower thread winding device. When it is detected that the bobbin thread winding stop switch is turned on, the processing operation of the bobbin thread winding device is immediately stopped. Therefore, for example, due to an operator error, a thread having an incorrect thread type, thread count, or thread color can be used as a bobbin thread supply source. If it has been used as, it will be immediately rewound and its removal operation will be done in a shorter time than if it had been completely wound, for example when moving to another work or In the case of home, the operator will not be bound by its place.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. The automatic bobbin thread feeder of the present embodiment, as shown in FIG.
A residual thread removing device 161, a bobbin exchanging device 160,
The bobbin exchanging device 160
Is the lower thread winding position C of the lower thread winding device 162, the residual thread removing position B of the residual thread removing device 161, the shuttle position (bobbin case attaching / detaching position) A, and the bobbin case attaching / detaching position of the dummy shaft (bobbin case holding means) 6. The bobbin case 2 is moved to D.

The lower thread winding position C and the residual thread removing position B are
As shown in FIG. 1, a range V below the transport shaft 4 and a range W on the rotation fulcrum 103 side when the sewing machine bed 101 is raised from the upright plane along the coaxial line, and the rotation of the bobbin case gripping means. It is located at the opposite position of the locus. The residual thread removing position B is arranged below the lower thread winding position C. In addition, the residual yarn removing position B is in the transport axis direction (see FIG.
The position of the bobbin case gripping means is at the retracted position, and the position of the bobbin winding position C in the transport axis direction is a position slightly advanced from the retracted position (the paper surface in FIG. 1). Position advanced toward
It is in. Incidentally, reference numeral 102 in FIG. 1 denotes a sewing machine table, 106 denotes an oil pan, 104 and 105 denote lower shafts, and X denotes a rotation locus on the outer peripheral side when the sewing machine head is raised.

The above-mentioned automatic bobbin thread feeder is a sewing machine bed 10.
It is provided in the lower part of 1. First, the bobbin exchanging device 160 will be described below with reference to FIGS. 2 to 6. 2 to 6, reference numeral 1 is a shuttle to which the bobbin case 2 is mounted, reference numeral 1a is a shuttle shaft, and reference numeral 3 is provided upright on the main base attached to the main body of the sewing machine and arranged directly below the shuttle 1. 3A and 3B respectively show a base plate serving as a support body. A base end 4a of a carrier shaft 4 having an axis parallel to the shuttle shaft 1a is fixed to the base plate 3, and the carrier shaft 4 is fixed to the base plate 3a. It is in a cantilevered state. A transport block 12 is rotatably and slidably supported on the transport shaft 4 on the tip 4b side (opposite the base plate side) of the transport shaft 4. As shown in FIG. 2 in particular, the transport block 12 has a shape in which the outer peripheral surface of a cylinder is cut at two locations along the axial direction so that the cut surfaces face each other. To each cut surface of the transport block 12, one plate-shaped portion forming the L-shape of the transport plates 10 and 10 bent in an L-shape is fixed. Also,
The other plate-shaped portions forming the L-shape are in a state of facing each other with the axis interposed.

Each of the carrier plates 10 and 10 has a holding portion 11 and 1 which is bent so as to extend toward the shuttle along the axial direction.
One end of each of the holding parts 11 and 11 is fixed, and bobbin case gripping means (not shown) for gripping or releasing the bobbin case is provided at the other end of the holding parts 11 and 11 (end facing the shuttle). Are fixed respectively. The bobbin case gripping means is described, for example, in an automatic bobbin thread feeder of Japanese Unexamined Patent Publication No. 5-192476 or in a sewing machine of Japanese Patent Application No. 5-121960 previously filed by the present applicant. Including a pair of electromagnet adsorption heads, which are already applied, for example, Japanese Patent Application No. 5-1163 filed by the applicant earlier.
Appropriate ones such as those with lever claws described in the automatic bobbin thread feeder of the sewing machine of No. 63 can be adopted. The point is that the bobbin case 2 is provided with a facing member (for example, a hook) as needed. Anything that can be attached to and detached from 1) may be used.

2 to 6 again, a rotary gear 13 is fixed to the outer periphery of the transfer block 12, and the rotary gear 13 has a hook shaft 1a as shown in FIG. A drive gear 19 having an elongated shape meshes with the direction. One end of the drive gear 19 is rotatably supported by a portion of the motor fixing plate 21 attached to the base plate 3 that protrudes toward the other end of the transport shaft, and the other end is fixed to the motor fixing plate 21. The rotary shaft 20 is directly connected to the output shaft of the rotary motor 20.

Therefore, when the rotation motor 20 rotates, the transfer block 12 is moved through the drive gear 19 and the rotation gear 13.
A rotating arm 70 composed of the carrier plates 10, 10 and the holding portions 11, 11 is adapted to rotate. In the present embodiment, the rotating operation of the rotating arm 70 is performed when the rotating arm 70 is in the retracted position (see FIGS. 3 to 5).

A not-illustrated stop ring, for example, is fixed to the outer periphery of the transport block 12 on the fixed end side of the transport shaft 4 with respect to the rotary gear 13, and the rotary gear 13 and the stop on the outer periphery of the transport block 12 are fixed. A linear motion collar 14 is rotatably supported between the ring and the ring.

As shown in FIGS. 2 to 4, one end of a rack 16 movably supported in parallel with the shuttle shaft 1a is fixed to the translation collar 14, and the rack 16 is fixed.
The pinion 17 meshes with the other end of the. The pinion 17 is fixed to the output shaft of a moving motor 18 attached to the base plate 3.

Therefore, when the moving motor 18 is driven, the linearly moving collar 14 and the rotating arm 70 move along the axial direction of the transport shaft 4 together with the rack 16 via the pinion 17. That is, the rotating arm 70
Can rotate with respect to the transport shaft 4 and can slide along the transport shaft 4.

A sensor fixing plate 33 is attached to the open end side of the conveying shaft 4, and a rotation sensor 31 including a light emitting element 31a and a light receiving element 31b is attached on the sensor fixing plate 33. ing. In addition, as shown in FIGS. 2 and 3, the sensor plate 3 is attached to the rotating arm 70.
2 is fixed, and the rotation sensor 31 and the sensor fixing plate 3 so that the sensor plate 32 can pass between the light emitting element 31a and the light receiving element 31b when the rotation arm 70 rotates.
3 and the position of the sensor plate 32 are adjusted.

As shown in FIGS. 2 and 4, the base plate 3 has a linear motion sensor 41 having the same structure as the rotation sensor 31.
Is attached. Further, the sensor plate 15 is fixed to the rack 16, and when the rotating arm 70 is linearly moved, the sensor plate 15 is a light emitting element 41 a of the linear movement sensor 41.
The positions of the linear motion sensor 41 and the sensor plate 15 are adjusted so that they can pass between the light receiving element 41b and the light receiving element 41b.

That is, when the bobbin case holding means moves to the retracted position, the sensor plate 15 causes the linear motion sensor 4 to move.
The first light emitting element 41a and the light receiving element 41b are shielded from each other, whereby the movement of the bobbin case holding means to the retracted position is detected. Then, this time, the origin position is searched at the retracted position. That is, if the bobbin case gripping means is rotated at the retracted position and the position where the sensor plate 32 shields the light emitting element 31a and the light receiving element 31b is set as the origin position, for example, the bobbin case gripping means is rotated to this position. Then, it returns to the origin position. Also,
When, for example, a pulse motor is used as the rotation motor 20, the number of pulses of the pulse motor is counted to move the bobbin case gripping means to the hook position A, the bobbin thread winding position C, and the residual thread removing position. B can be controlled to rotate to the dummy position D.

Here, in the present embodiment, the turning arm 70 is in the retracted position and the position where the bobbin case 2 held by the bobbin case holding means faces the shuttle 1 is set at the turning arm 70 (bobbin case holding). Means) as the origin position.

A dummy shaft 6 as a bobbin case holding means is provided at a position opposite to the rotation locus of the bobbin case holding means on the base plate 3 and directly below the shuttle 1 as shown in FIG. Is fixed. As shown in FIG. 6 in particular, the dummy shaft 6 has the same structure as the inner hook shaft 5, and the bobbin case 2 in which the bobbin is housed.
The bobbin case 2 can be held by pushing. Then, the existing bobbin locking claw 2d of the bobbin case 2 that has been pushed in is configured to engage with the locking groove of the detent member 5aa projecting near the dummy shaft 6, as shown in FIG. Has been done. That is, the bobbin case 2 is positioned and held at a predetermined position.

At the residual yarn removing position B, a residual yarn removing device 161 is arranged. The residual yarn removing device 161 has, for example, a holding member capable of holding or releasing the tip end of the yarn wound on the bobbin, and is held by the holding member by rotating about one axis by, for example, driving a motor. A bobbin thread that can be automatically wound is used, but the point is that the bobbin case 2 is handed over to a state in which the bobbin case 2 is held by the bobbin case holding means or a means capable of holding the bobbin case. With the bobbin case 2 held by the bobbin case 2, the bobbin is rotated by the thread drawing operation of the drawing means for drawing the thread wound around the bobbin and drawn (dripping) from the bobbin case, and the thread wound around the bobbin is drawn out. Or the bobbin separated from the bobbin case 2 can be operated by the thread drawing operation of the drawing means. Hei may Whatever long as such yarn is pulled out, for example, the present applicant has previously filed by 5-203
Appropriate devices can be adopted, including the bobbin residual yarn removing device described in Japanese Patent Application No. 610, Japanese Patent Application No. 6-40351 and Japanese Patent Application No. 7-30027.

At the lower thread winding position C, the lower thread winding device 16 is provided.
2 are provided. As the lower thread winding device 162, for example, an apparatus that can automatically wind the lower thread around the bobbin by rotating the bobbin by driving a motor or the like is adopted. The lower thread winding device 162 includes a bobbin drive mechanism E, an air guide mechanism G, and a yarn supply detection mechanism F, as shown in a simplified manner in FIG. First, the bobbin drive mechanism E will be described below.

In FIGS. 7, 8 and 13, reference numeral 50 indicates a winding shaft, which is rotatably supported by the base plate 3. A plurality of holes 7b formed in the bobbin 7 at one end of the winding shaft 50 (see FIG. 17).
A clutch mechanism 50a capable of clutching is fixed to the other end, and a pulley 50b is fixed to the other end. A bobbin drive motor M2 is also fixed to the base plate 3. A pulley 52 is fixed to the output shaft of the bobbin drive motor M2, and a belt 51 is stretched between the pulley 52 and the pulley 50b.

That is, the bobbin case 2 which has reached the bobbin winding position C by the rotation of the rotating arm 70 is moved by the rotating arm 7.
When the bobbin driving motor M2 is driven while the bobbin driving motor M2 is driven forward by the forward movement operation of 0, the winding shaft 50 is rotated and the clutch mechanism 50a and the bobbin 7 are connected. Note that the clutch mechanism is not limited to the structure that engages with the hole as described above, and may have another structure.

Further, the lower thread winding device 162 includes a thread supply detecting mechanism F for detecting the entanglement of the lower thread with the bobbin shaft and the amount of the lower thread wound around the bobbin. The yarn supply detecting mechanism F will be described below. 9 and 10, the reference numeral 53 indicates a U-shaped base.
A roller shaft 55 is rotatably provided between the two side plates 53a and 53b. The side plate 53b of the roller shaft 55
The side end projects outward from the side plate 53b, and the bobbin thread 150 from the spool 200 is wound around the end (1
Rolled roller 54 is fixed.

A sensor slit 58 is fixed to a portion of the roller shaft 55 between both side plates 53a and 53b.
The sensor slit 58 has a disk shape, and a groove is provided in a part of the outer circumference. A photo sensor 60 is arranged at a position facing the sensor slit 58, and the groove of the sensor slit 58 can be detected. That is, the rotation of the roller 54 can be detected by the photo sensor 60.

The photo sensor 60 has a lower thread 15
An effective lower thread winding amount detecting means 61 for detecting the entanglement of 0 on the bobbin shaft and for detecting the effective lower thread winding amount wound around the bobbin shaft is connected. Further, the effective bobbin winding amount detecting means 61 is connected to a judging means 61B. This determination means 61B is a bobbin thread wound on the bobbin actually set by the set bobbin thread winding amount from the means 61A which can input and set the bobbin thread winding amount connected to the outside and the effective bobbin winding amount detecting means 61. It functions to send a drive stop signal to the driver 310a of the bobbin drive motor M2 when both bobbin thread amounts match. The effective bobbin winding amount detecting means 61 and the determining means 61B are incorporated in the bobbin winding device control means 401 (see FIG. 19) described later.

Further, downstream of the thread supply detecting mechanism F, the bobbin thread 150 from the bobbin winding 200 (see FIG. 11) as a bobbin thread supply source is guided into the bobbin case 2 through the opening 2A of the bobbin case 2. An air guide mechanism G is provided as a thread inserting means for performing the thread insertion. The air guide mechanism G will be described below. 7, 8 and 12, reference numeral 65 indicates a substantially hollow cylindrical yarn suction device, and as shown in FIG. 12, the yarn suction device 65 has a through hole 65b as a linear path. And a suction hole 65a that is obliquely connected to the through hole 65b and is open to the outside.
Are formed. As shown in FIGS. 7 and 8, an air tube 66 is provided at the opening on the upstream side of the through hole 65b.
Is connected to one end of the air tube 66, and the other end of the air tube 66 is connected to a solenoid valve 68. An air source (not shown) is connected to the solenoid valve 68. Further, in the open port on the downstream side of the through hole 65b in the yarn suction device 65,
One end of the air tube 67 is connected, the other end side of the air tube 67 is bent in a V shape, and an air nozzle 67a is provided at the tip thereof.

As shown in FIGS. 7 and 8, the yarn suction device 65 is fixed to the nozzle shaft 34, and the nozzle shaft 34 is rotatably supported by the base plate 3. The yarn suction device 65 and the base plate 3 on the nozzle shaft 34
A nozzle gear 35 is fixed between them, and a nozzle motor gear 36 meshes with the nozzle gear 35. The nozzle motor gear 36 is fixed to the output shaft of a stepping motor 37 as an air nozzle retracting motor fixed to the base plate 3.

Therefore, when the stepping motor 37 is driven, the yarn suction device 65, the air tube 67, and the air nozzle 67a rotate about the nozzle shaft 34 as a rotation fulcrum. The rotational position of the air nozzle 67a at this time is detected by the sensor plate 38 fixed to the nozzle gear 35 and the nozzle sensor 39 fixed to the base plate 3 and detecting the position of the sensor plate 38. The stepping motor 37 is controlled according to the detection result. That is, by driving the stepping motor 37, the air nozzle 67a
When the lower thread is entangled with the bobbin shaft 7a, it is located at a position (working position) N1 facing the opening 2A of the bobbin case 2 shown by the solid line in FIG. It is located at the retracted position N2 shown by the alternate long and short dash line in FIG. 8 and is located at the thread cutting position (the position between the working position N1 and the retracted position N2) shown by the alternate long and short dash line in FIG. ing.

Reference numeral 22 in FIGS. 7 and 8 indicates a cover for covering the bobbin drive mechanism E and the air guide mechanism G.
23 is a suction hole 65 of the yarn suction device 65 from the yarn supply detection mechanism F.
Guide rods for guiding the lower thread to a are shown respectively.

By the way, when the lower thread is entangled with the bobbin shaft 7a, the predetermined length of the lower thread is led out from the tip of the air nozzle 67a located at the working position N1 (details will be described later). The bobbin thread length (LL) led out from the air nozzle 67a is set to a length necessary for entwining the drawn bobbin thread end portion with the bobbin shaft. And this required length is in the range of {(length from the air nozzle at the working position to reach the outer circumference of the bobbin shaft) + [bobbin shaft full circumference length × (1.1 to 2.0)]}. It is preferable that {(the length from the air nozzle at the working position to reach the outer circumference of the bobbin shaft) + [the circumference length of the bobbin shaft ×
(1.25 to 1.8)]} is more preferable.

When the length is longer than the above range, it becomes difficult for the drawn out lower thread end to enter through the opening 2A of the bobbin case 2, or even if it does enter, the bobbin shaft 7a goes around the bobbin shaft 7a one or more times to form a knot by itself. There is a fear that the bobbin shaft 7a is bound, and if it is shorter than the range of, there is a fear that the lower thread end does not get entangled with the bobbin shaft 7a.

In this embodiment, the required length is 55 m.
m. That is, the distance H between the tip of the air nozzle 67a and the opening 2A of the bobbin case 2 is 7 mm, and the length 7 from the bobbin case opening 2A to the bobbin shaft outer circumference is 7 mm.
mm and (bobbin shaft circumference 25 mm x 1.64) = 41 mm
Asked from.

The lower thread guiding direction (air blowing direction) of the tip of the air nozzle 67a located at the working position N1 is on the bobbin shaft lower thread winding side. The bobbin shaft lower thread winding side referred to here is, as shown in FIGS. 14 and 15, one direction of the outer circumference of the bobbin shaft 7a divided into two by a line segment YY connecting the center of the bobbin shaft 7a and the tip of the air nozzle 67a. That is, this is the side on which the bobbin thread 150 is entangled with the bobbin shaft 7a (direction XX in FIG. 15). Also,
The lower thread guiding direction of the tip of the air nozzle 67a is preferably a direction intersecting the outer circumference of the bobbin shaft 7a on the bobbin shaft lower thread winding side XX, and particularly preferably a direction contacting the outer circumference of the bobbin shaft 7a.

Then, the distance H between the tip of the air nozzle 67a stopped at the position facing the bobbin case opening 2A (at the working position N1) and the opening 2A of the bobbin case 2.
(See FIG. 14) is preferably 10 mm or less, and particularly preferably 3 to 7 mm. With this range, the bobbin thread 15
It is possible to suppress the fluttering caused by the blown air of 0 and to form the vortex flow required for the lower thread 150 to be entangled with the bobbin shaft 7a in the bobbin case 2.

By the way, the lower thread winding device 162 is provided with a yarn hooking device. As shown in FIG. 16, this thread hooking device has a moving knife thread separator 116 rotatably arranged around the bobbin case 2 set at the lower thread winding position C. By rotating the loosening 116 around the bobbin case 2, the bobbin thread 150 from the bobbin winding 200 wound around the bobbin and led out from the bobbin case opening 2A is provided between the open end of the bobbin case 2 and the outer circumference of the bobbin 7. It is guided to the thread hooking position 2B through the gap and guided to the slit groove 2C, and the lower thread tension hole 2D and the lower thread lead-out hole 2 below.
It can be led out from the vicinity of the lower thread tension spring hole 2E via H (see FIG. 17). The thread hooking device is not limited to the one having the above-described configuration, and in short, the bobbin thread 150 wound around the bobbin and drawn out from the bobbin case opening 2A can be hooked on the bobbin case 2. Any device may be used as long as it is, for example, a yarn hooking device described in Japanese Patent Laid-Open No. 7-68071 or a yarn hooking device described in Japanese Patent Application No. 7-65140 previously filed by the present applicant. It is possible to adopt an appropriate one, starting with.

The bobbin thread winding device 162 is further provided with a thread cutting device. In this thread cutting device, the bobbin thread 150 from the bobbin winding 200 drawn out from the vicinity of the bobbin thread tension spring hole 2E is separated by the rotating operation of the moving knife thread separating section 116 and left for a predetermined length with the fixed knife 91. In this way, it can be cut (see FIG. 16).

Here, the lower thread tension spring hole 2E of the lower thread drawn out from the vicinity of the bobbin case 2 lower thread tension spring hole 2E.
To bobbin thread cutting point S (specifically, moving knife thread handling knife 116
The bobbin case 2 is fixed so that the bobbin thread length up to the point of rubbing with the fixed knife 91 (see FIG. 16) is the length required for seam formation by entanglement with the upper thread, that is, about 40 mm. The positions of the knife 91, the lower thread cutting point S, etc. are determined.

Further, the air nozzle 67a is set at the thread cutting position N.
5, the distance between the lower thread cutting point S at the time of cutting and the tip of the air nozzle 67a is required to entangle the lower thread with the bobbin shaft 7a as shown in FIG. Arrangements such as the bobbin case 2, the bobbin thread cutting point S, and the thread cutting position N5 of the air nozzle 67a are determined so as to substantially match the length LL (about 55 mm in the present embodiment).

The thread trimming device is not limited to the one having the above-mentioned structure, and the point is that the bobbin case 2 is wound around the bobbin case 2 and the bobbin thread tension spring 2D is passed through the bobbin thread outlet hole 2H. Bobbin 200 leading out from the vicinity of the spring hole 2E
Any one can be used as long as it can cut the bobbin thread 150 from No. 1 to 3, leaving the predetermined length, for example, the thread cutting device described in Japanese Patent Laid-Open No. 7-68071 or the applicant previously filed. Appropriate ones can be adopted including the thread cutting device described in Japanese Patent Application No. 7-65140.

Further, the thread supply detecting mechanism F and the thread winding 20
As shown in FIG. 11, a yarn tension varying means 204 for varying the tension of the bobbin thread 150 is provided between 0 and 0. This thread tension varying means 204 is used for the passing bobbin thread 150.
A tension spring 205 that presses the tension spring 205, a screw 206 that adjusts the pressing force of the tension spring 205 by a manual operation, and a solenoid SO that is disposed in the sewing machine bed 101 and that generates a solenoid thrust that resists the pressing force of the tension spring 205.
It is composed of L and. This thread tension varying means 204
The electric circuit for driving is configured such that a solenoid SOL is connected to a power source in series and a switch is interposed therebetween.

Therefore, when the switch is turned off, the solenoid thrust is not generated, the pressing force of the tension spring 205 is applied to the bobbin thread 150 to the maximum, and the bobbin thread tension is maximized. Further, when the switch is turned on, the above-mentioned solenoid thrust is maximally generated, and the tension spring 20 is applied to the lower thread 150.
The pressing force of 5 minus the solenoid thrust is applied,
The bobbin thread tension is minimum.

When the residual yarn removing device 161 and the bobbin winding device 162 contact the base plate 3 shown in FIG. 1, the base plate 3 is appropriately cut. Further, in FIG. 1, the residual thread removing position B, the bobbin thread winding position C, and the dummy shaft 6 are shown.
The bobbin attaching / detaching position D is close to the holding portion 11
Is exaggerated and described. Therefore, there is a concern that the holding unit 11 may contact the residual yarn removing device 161 and the bobbin winding device 162, but in reality, a sufficient space is secured to prevent such contact.

Further, an operation panel (not shown) is attached to the above automatic bobbin thread feeder, and this operation panel has
An operation switch, a setting switch 61A (see FIG. 10) as a bobbin winding amount setting means, a bobbin winding stop switch 309 for stopping the bobbin winding processing operation on the way, and an error display window 316 as a display means are attached. Has been done. Next, a bobbin thread automatic supply control device for controlling the operation of the bobbin thread automatic supply device will be described.

First, as shown in FIG. 18, the sewing machine main body 300 for executing a predetermined sewing operation is provided with a sewing machine power switch 302 for turning on / off the main power supply, and this sewing machine power switch is also provided. A sewing machine power supply monitoring means (sewing machine power supply monitoring circuit) 301 for discriminating between ON and OFF of 302 is additionally provided. This sewing machine power supply monitoring means 301 is provided with a power supply energization control device 450 (see FIG. 19) which will be described later.
The power source of, for example, + 5V in the sewing machine control circuit is monitored in advance, and the off detection signal of the sewing machine power switch 302 is
Energization timing control means 31 of the power supply energization control device 450
5 (described later).

On the other hand, the main power supply is also connected to the DC power supply circuit 304 via a relay switch 303 which constitutes a control switch means of a power supply energization control device 450 described later. The DC power supply circuit 30 of the power supply energization control device 450
4 is a bobbin thread winding device 162 described above.
(To be precise, it also includes a thread hooking and thread cutting device), a residual thread removing device 161 and a bobbin exchanging device 160, which are connected so as to supply drive currents, respectively, and are connected to the relay switch 3
Each device 1 based on the ON / OFF signal emitted from 03
It is configured to control the energization of 60, 161, 162.

Further, the bobbin winding device 162 has the structure shown in FIG.
8, the driver 310a for the bobbin drive motor M2 and the driver 31 for the air nozzle retraction motor 37
0b, a driver 31 for the motor of the thread separating unit 116 with a moving knife
0c, driver 3 for solenoid SOL of thread tension varying means
10d and the solenoid valve 68 driver 310e are connected to the bobbin exchanging device 160.
8 driver 311a, rotation motor 20 driver 31
1b are respectively connected, and the residual thread removing device 16
A residual thread winding motor driver 312a is connected to each of the terminals 1. A driver 313 is connected to the relay switch 303.

Then, these drivers 310a-310
e, 311a, 311b, 312a, 313, I /
CPU (Central Processing Unit) 30 via O port 305
6 and the signals from the ROM 307 and the RAM 308 attached to the CPU 306 are connected so as to be input. Then, the above devices 162, 161, 160
However, as shown in FIG. 19, the above-described predetermined operation is executed while being controlled by the automatic bobbin thread feeder control means 400, and the bobbin thread automatic feeder control means is made to enable this execution. The energization state of 400 is controlled by the power supply energization control device 450.

That is, as shown in FIG. 19, the lower thread automatic feeding device control means 400 includes a lower thread winding device control means 401 and a bobbin changing device control means (bobbin transport
Attachment / detachment device control means) 402 and residual yarn removal device control means 4
03, and each of these control means 401,
A predetermined drive current is supplied from the DC power supply circuit 304 of the power supply energization control device 450 to the parts 402 and 403, and an operation command signal from the energization timing control means 315 of the power supply energization control device 450 is similarly applied. ing. The energization timing control means 315 has a function of constantly monitoring the operations of the bobbin winding device 162, the residual yarn removing device 161, and the bobbin exchanging device 160.

The energization timing control means 315 is also provided.
A detection signal from the above-mentioned sewing machine power source monitoring means 301, that is, a signal which detects the on / off state of the sewing machine power source switch 302, is applied to. Then, when the energization timing control means 315 receives the off detection signal of the sewing machine power switch 302, the energization timing control means 315 completes the processing operation of the device that is in the middle of operation at the time of the power-off, and then is scheduled to be performed following this processing operation. If there is a necessary processing operation before the bobbin replacement, the processing operations are sequentially completed to enter the bobbin replacement standby state, that is, the processing necessary for the bobbin replacement (remaining thread removing processing, bobbin winding processing, thread hooking processing). , The thread trimming process) and then the operation command signal for moving the bobbin case to the retracted position (origin position) facing the shuttle 1 is used as the control means 401, 402, 403.
Each has a function to emit.

The energization timing control means 315 is also provided.
Is an operation command signal for advancing the bobbin case, which has been subjected to the processing necessary for bobbin replacement, from the origin position to a position where the bobbin case approaches the shuttle 1 when the bobbin case is in a standby state for bobbin replacement. To the bobbin exchange device control means 402 described above.

The energization timing control means 315 is also provided.
Has a function of issuing a processing completion signal to the control switch means 303 when the bobbin exchanging device 160 advances the bobbin case from the origin position to the position where the bobbin case faces and approaches the shuttle 1. On the other hand, control switch means 303
Is composed of a power relay switch, a solid state relay, etc., and is always supplied with an AC drive current regardless of the sewing machine power switch 302. Then, the control switch means 303 is configured to output a turn-off command signal to the DC power supply circuit 304 upon receiving the processing completion signal from the energization timing control means 315 described above. DC power supply circuit 3 which received this OFF command signal
04 will stop the supply of the drive current to the control means 401, 402, 403 and the devices 160, 161, 162.

As described above, since the bobbin case, which has been subjected to the necessary processing for bobbin exchange, is located at a position facing and facing the hook 1, the bobbin in the hook 1 and the bobbin in the hook 1 are retracted unless the rotating arm 70 is forcibly retracted. It is difficult to intervene in the bobbin case, the bobbin that is opposed to the bobbin case, and the bobbin case. That is, the bobbin and the bobbin case are prevented from being inadvertently touched unless necessary.

Further, the energization timing control means 31
The processing completion signal issued from the RAM 5 is also applied to the RAM (nonvolatile memory) 308 as the cutoff information storage means. The RAM 308 is composed of a battery backup RAM, an EEPROM or the like,
Information on whether the power is cut off normally or abnormally (for example, at the time of power failure) is stored in the RAM 308.
On the other hand, the power cutoff normality / abnormality information stored in the RAM 308 is constantly referred to by the energization timing control means 315 side, and the power cutoff normality / abnormality information stored in the RAM 308 is energized timing control means 315. Has been confirmed in. Then, the energization timing control means 315 is configured to issue an initialization signal to each of the control means 401, 402, 403 based on the confirmed normality or abnormality information of the power interruption.

The energization timing control means 315 is also provided.
A predetermined display means 316 is connected to the R
The power shutdown normal or abnormal information stored in the AM 308 is configured to be displayed.

Further, the energization timing control means 31
5 has a function of issuing an operation command signal to the bobbin exchanging device control means 402 described above so as to detect the origin from a position where the bobbin case is opposed to and approaching the shuttle 1 when the re-on detection signal of the sewing machine power switch 302 is received. Have

Further, the power supply energization control device 450 includes
Upon receiving the detection signal from the sewing machine power source monitoring means 301 and monitoring the operation of the bobbin exchanging device 160, the sewing machine power source switch 302 receives the re-on detection signal, and the origin is detected from the position where the bobbin case faces the hook 1 oppositely. When the origin is detected, it is determined whether or not the number of steps when the origin is detected is the same as the number of steps when the bobbin case is advanced to the position where the bobbin case is opposed to the hook 1. Before turning on the switch 302 again,
The manual intervention determination means 317 for determining that the bobbin and the bobbin case inside the bobbin and the bobbin case that are close to and facing the shuttle 1 have been intervened (taken some kind of treatment even if the trouble did not occur) Has been.

When the manual intervention determining means 317 determines that the manual intervention has taken place on the bobbin and the bobbin case before the sewing machine power switch 302 is turned on again, the display means 316 issues a warning indicating that the manual intervention has occurred. It is configured to display. That is, the operator is urged to check.

Further, when the manual intervention determination means 317 determines that the manual operation has not intervened in the bobbin and the bobbin case before the sewing machine power switch 302 is turned on again, the above-described energization timing control means 315 makes a predetermined decision. The operation command signal for continuing the process is sent to each of the control means 40 described above.
1, 402, 403 respectively.

Further, particularly when the energization timing control means 315 in the present embodiment detects one of the turning-off of the sewing machine power switch 302 and the turning-on of the bobbin winding stop switch 309 during the processing operation of the bobbin winding device 162. Only, it has a function of issuing an operation stop command signal for immediately stopping the processing operation of the lower thread winding device 162 to the lower thread winding device control means 401 described above.

At this time, the energization timing control means 315
Is an operation command signal for performing thread hooking by the thread hooking device and thread cutting by the thread cutting device on the bobbin whose bobbin winding operation has been stopped midway.
01 has a function to originate.

Further, the energization timing control means 315 is
When the bobbin whose bobbin winding operation has been interrupted halfway has been threaded and thread trimmed, the control switch means 3 is operated.
03 has a function of issuing a processing completion signal (provided that the sewing machine power switch 302 is turned off).

Next, the control operation of the lower thread automatic feeder using such a controller will be described with reference to the flow charts shown in FIGS. Considering the ease of understanding the explanation,
The description will be given from the start of the sewing operation. That is, first, in step 5, RAM (nonvolatile memory)
When 308 is cleared, the automatic bobbin thread feeder is put in the operation start standby state. Then, in step 6, it is determined whether or not there is a bobbin replacement request. The bobbin replacement request is automatically generated by the automatic bobbin thread feeder when, for example, the bobbin remaining yarn in the shuttle becomes small, or when the operator turns on the replacement request switch.

Then, if there is a bobbin replacement request by any of these, the process proceeds to step 7, and in step 7,
In order to avoid interference with the sewing machine 300, the sewing machine operation is prohibited and the process proceeds to step 8 where the bobbin is replaced. At this point, the one bobbin case 2Y held by the bobbin case holding means is at the original position, that is, the retracted position facing the shuttle 1 by the operation of step 4 or step 14 described later (see FIG. 6). For convenience of description, this bobbin case is 2Y and the bobbin case in the shuttle is 2X.

Then, the rotating arm 70 is rotated by 180 ° so that the bobbin case gripping means not gripping the bobbin case faces the hook 1 and is advanced to move the bobbin case 2X in the hook.
Is taken out, and then the rotating arm 70 is retracted. Next, the rotating arm 70 is rotated 180 ° to rotate the bobbin case 2
Y is opposed to the shuttle 1 and then moved forward to mount the bobbin case 2Y in the shuttle, and then the rotating arm 70 is retracted.

Next, in step 9, the operation of the sewing machine 300 is permitted in step 9, and the process proceeds to step 10. In step 10, the residual yarn removing process is performed and the process proceeds to step 11. In step 11, the bobbin thread winding process is performed. (Winding), thread hooking, and thread cutting processing are performed. First, the bobbin winding process will be described according to the bobbin winding process routine shown in FIG.

In this bobbin winding process routine, the following operations are performed before that. First, the bobbin thread 200 and the lower thread 150 from the thread tension varying means 204 are wound around the roller 54 by one.
Roll it up. At this time, the switch of the thread tension varying means 204 is turned on to maximize the solenoid thrust to minimize the bobbin thread tension.

Next, the thread end of the lower thread 150 is inserted into the suction hole 65a of the thread suction device 65 and pushed in slightly. Then
Temporarily turn on the solenoid valve 68 and air tubes 66, 67
Air from the air source is flown into the suction hole 65a, and the lower thread 150, which has been pushed into the suction hole 65a, is guided to the air nozzle 67a by the flow of air, and its thread end is exposed from the air nozzle 67a and led out. As described above, the lead-out length LL is a length required to entangle the bobbin shaft with the bobbin shaft, and is about 55 mm in the present embodiment. When the lower thread 150 inserted and pushed into the suction hole 65a is conveyed from the thread suction device 65 by air to be exposed from the air nozzle 67a and discharged, the operator manually pulls the lower thread from the spool 200. The required amount can be more favorably conveyed by pulling it loose in advance and loosening it by hand or by sending it out manually.

Then, in step 1, the rotating arm 70 is rotated to move the bobbin case 2X to the lower thread winding position C.
To face. Then, proceed to Step 2, Step 2
At this time, the rotating arm 70 is moved forward to move the bobbin case 2
X is moved to the bobbin winding position C and the bobbin drive motor M2 is temporarily driven to move the clutch mechanism 50a and the bobbin 7
And concatenate.

Next, in step 3, in step 3, the bobbin drive motor M2 is driven to rotate the bobbin 7, as shown in FIG. 22 (b). Next, in step 4, in step 4, the air nozzle retraction motor 37 is driven to move the air nozzle 67a waiting at the retreat position N2 to the work position N1 as shown in FIG.

Next, in step 5, in step 5, as shown in FIG. 22 (a), blowing of air from the air nozzle 67a is started, and the process proceeds to step 6, where in step 6, a fixed time is waited.

Then, as shown in FIG. 14, the bobbin thread end portion drawn out from the air nozzle 67a is satisfactorily inserted into the bobbin case 2 through the opening 2A of the bobbin case 2 with the fluttering suppressed. The bobbin shaft 7a is guided to the bobbin shaft lower thread winding side XX and is entangled with the bobbin shaft 7a by the cooperation of the rotation of the bobbin shaft 7a and the vortex flow formed by air.

In this way, when the bobbin thread 150 from the spool 200 is entangled with the bobbin shaft 7a, the roller 54
Starts to rotate, and from the photo sensor 60, as shown in FIG.
As shown in, the pulse wave starts to be output.

Then, in step 7, it is determined whether or not the effective bobbin winding amount detecting means 61 has counted a predetermined number of the pulse waves during the above-mentioned fixed time. Here, in the present embodiment, it is determined that the bobbin thread 150 is entangled with the bobbin shaft 7a when three pulse waves are detected. The number of pulse waves of three is a value that allows for a safety factor, and is not limited to this number.

Then, in step 7, when a predetermined number of pulse waves are not counted within a fixed time,
It is determined that the entanglement of the bobbin thread with the bobbin shaft 7a has failed, and the process proceeds to step 15. In step 15, the yarn guiding air from the air nozzle 67a is stopped and the process proceeds to step 16. In step 16, the air nozzle retract motor 3
7 to drive the air nozzle 67a at the work position N1.
To the retracted position N2. Then, the process returns to step 4 to retry.

On the other hand, in step 7, when the predetermined number of pulse waves are counted within the fixed time, it is determined that the bobbin shaft 7a has been successfully entangled with the bobbin thread, and the effective bobbin thread winding amount detecting means 61 determines. , The pulse wave after this is counted as the effective bobbin winding amount.

Next, in step 8, in step 8, as shown in FIG. 22 (a), the yarn guiding air from the air nozzle 67a is stopped and the process proceeds to step 9. In step 9, the air nozzle retracting motor is set. 37
Is driven as shown in FIG. 22C to move the air nozzle 67a at the working position N1 to the retracted position N2.

At this time, the bobbin drive motor M2 continues to rotate, and therefore the lower thread is wound around the bobbin shaft 7a. In this way, the tip of the air nozzle 67a and the bobbin shaft 7 are
When the bobbin thread is wound with the distance between the bobbin and the thread a being increased, the bobbin thread 150 is wound substantially uniformly over the entire area of the bobbin shaft 7a.

Then, the process proceeds to step 10 and step 1
At 0, the determining means 61B compares the actual lower thread winding amount detected by the effective lower thread winding amount detecting means 61 with the set lower thread winding amount input from the lower thread winding amount setting means 61A. It is determined whether the bobbin thread amounts match. Here, if they do not match, that is, if the bobbin thread has not yet been wound to the set bobbin thread winding amount, the process proceeds to step 11, and in step 11, it is determined whether or not the sewing machine power switch 302 is off, and it is determined to be on. In this case, the process proceeds to step 12, and in step 12, the bobbin winding stop switch 30
It is determined whether 9 is on, and if it is off, the process returns to step 10.

That is, unless the sewing machine power switch 302 or the bobbin winding stop switch 309 is detected to be ON during the bobbin winding operation, the actual bobbin winding amount is compared with the set bobbin winding amount. Repeatedly, if they match, the process proceeds to step 13, and in step 13, the bobbin drive motor M2 is stopped. That is, the set lower thread winding amount input from the lower thread winding amount setting means 61A is wound around the bobbin shaft 7a.

When the bobbin thread 150 is automatically wound around the bobbin 7 in this way, the process proceeds to step 14, in which the thread tension varying means 204 is turned off to eliminate the solenoid thrust. Perform threading with the bobbin thread tension maximized. That is, the spool 20 wound around the bobbin 7 and led out from the bobbin case opening 2A.
The lower thread 150 from 0 is guided to the thread hooking position 2B through the gap between the open end edge of the bobbin case 2 and the outer circumference of the bobbin 7 and guided to the slit groove 2C, and the lower thread tension hole 2D below the lower thread discharge hole. It is led out from the vicinity of the bobbin thread tension spring hole 2E through 2H.

When the thread is hooked in this way, the air nozzle 67a is moved from the retracted position N2 to the thread cutting position N5, and the switch of the thread tension varying means 204 is turned on to maximize the solenoid thrust. Thread trimming is performed with the lower thread tension minimized. As a result of this thread trimming,
As described above, the bobbin case 2 side bobbin thread has a length required for stitch formation by entanglement with the upper thread, that is, 40 mm.
The degree is such that the bobbin thread is pulled out from the vicinity of the bobbin thread tension spring hole 2E through the bobbin thread outlet hole 2H below the bobbin thread tension spring 2D, and the bobbin thread on the bobbin winding 200 side is, as described above, attached to the bobbin shaft 7a. Length LL required to entangle the wire, ie 55 mm
The degree is such that it is led out from the tip of the air nozzle 67a.

As described above, since the lower thread of the length LL required for entwining the lower thread with the bobbin shaft 7a is drawn from the air nozzle 67a, the bobbin for the next time (same for the next time and thereafter) On the other hand, if the same operation as described above is performed, the lower thread can be wound in the same manner. Then, the air nozzle 67
a is moved from the thread cutting position N5 to the retracted position N2. When the bobbin thread cutting operation is automatically performed in this way, the process returns to step 12 of the flowchart shown in FIG.

On the other hand, if it is determined in step 11 of the bobbin winding process routine that the sewing machine power switch 302 is off, or if it is determined in step 12 that the bobbin winding stop switch 309 is on, step 1
3, the bobbin drive motor M
Stop 2 That is, when it is detected that the sewing machine power switch 302 is turned off or the bobbin winding stop switch 309 is turned on during the bobbin winding processing operation, the bobbin winding processing operation is immediately stopped. Then, the process proceeds to step 14, and the bobbin in which the lower thread is wound halfway is hooked and thread-cut in the same manner as described above, and the bobbin shown in FIG.
The process returns to step 12 of the flowchart shown in FIG.

Then, in step 12 shown in FIG. 20, it is determined whether or not the sewing machine power switch 302 is off. If it is determined that the sewing machine power switch 302 is off, the process proceeds to step 18, and in step 18, the relay The switch 303 is turned off to cut off the power source of the automatic bobbin thread feeder. That is, when it is determined that the sewing machine power source 302 is off in step 11 of the above-described bobbin thread winding processing routine, the flow of steps 12 and 18 shown in FIG. 20 is performed.

On the other hand, if it is determined in step 12 that the sewing machine power switch 302 is on, step 1
In step 13, it is determined whether the bobbin thread winding stop switch 309 is on. If it is determined that the bobbin thread winding stop switch 309 is on, the process returns to step 12 and the same determination is repeated. That is, when it is determined in step 12 of the above-described bobbin thread winding routine that the bobbin thread winding stop switch 309 is turned on, the flow of steps 12, 13, and 12 shown in FIG. Wait for 302 to turn off.

On the other hand, when it is determined in step 13 that the bobbin winding stop switch 309 is off, that is, the sewing machine power switch 302 is off and the bobbin winding stop switch 309 is not detected during the bobbin winding processing operation, When the normal bobbin winding process, thread hooking process, and thread trimming process have been completed, the process proceeds to step 14, and in step 14,
The rotating arm 70 is retracted to the retracted position, and then rotated to make the bobbin case 2X face the shuttle 1 to be in a standby state.

Then, the process proceeds to step 15 and step 1
At 5, it is determined whether the sewing machine power switch 302 is off. Therefore, even if the sewing machine power switch 302 is turned off during the processing operation of each device in steps 8 to 11 (excluding the bobbin winding operation), step 8
All the series of processing operations in 11 to 11 are performed to enter the bobbin replacement standby state.

Then, if there is no bobbin replacement request in step 6 above, the process proceeds to step 15 and step 1
When it is determined in 5 that the sewing machine power switch 302 is ON, the process returns to step 6. That is, when the sewing machine power switch 302 is turned on, the bobbin case 2X held by the bobbin case holding means is in the original position and waits for a bobbin replacement request. When it is determined to be off, that is, when the sewing machine power switch 302 is turned off by the operator, the process proceeds to step 16.

Next, at step 16, the rotating arm 70 is moved forward by a predetermined number of steps to move the bobbin case 2X to the position where the bobbin case 2X opposes and approaches the shuttle 1. As a result, the bobbin case 2X and the bobbin case 2Y in the shuttle cannot be taken out unless the rotating arm 70 is forcibly rotated or retracted by hand. Incidentally, in the present embodiment, since there is an obstacle around the bobbin case holding means at this position, the rotation of the rotating arm 70 is restricted, and the rotation is not possible.

Then, the process proceeds to step 17, step 1
7, the current state is RAM (non-volatile memory)
In addition to being stored in the RAM 308, the fact that the normal power-off processing has been performed is also stored in the RAM 308. Then, the process proceeds to step 18, and in step 18, the relay switch 303 is turned off to cut off the power source of the automatic bobbin thread feeder.

After that, when the sewing machine power switch 302 is turned on again, the process returns to step 1 shown in FIG. 20, and the information on the state at the time of the previous power shutdown and whether or not the normal power shutdown process has been performed is displayed. It is read from the RAM 308.

Then proceed to step 2 where the initialization operation is performed in the most efficient manner.
Then, when this initialization operation is completed, the process proceeds to step 3, and in step 3, it is judged whether or not the previous normal power-off process was performed, and if it is the normal power-off process, that is, the operator turns on the sewing machine power supply. If the switch 302 is turned off, the process proceeds to step 4. If not, for example, if the power is not shut down normally due to an unexpected power failure, the display means 316 such as an error display window and a warning buzzer is displayed. An error message is displayed, and operator intervention is prompted to proceed to step 19. Further, if it is detected that the sewing machine power switch 302 is turned off or the bobbin winding stop switch 309 is detected during the bobbin winding operation, the process proceeds to step 19.

In step 4, the rotary arm 70 is retracted by a predetermined number of steps to detect the origin, and it is determined whether or not the origin is detected by the same number of steps (step 16) as described above. Here, when the operator takes out the bobbin case 2X and the bobbin case 2Y in the shuttle while the sewing machine power switch 302 is off, the position of the rotating arm 70 moves from the position where the rotary arm 70 approaches and approaches the shuttle 1. Therefore, the origin is not detected with the same number of steps as above. on the other hand,
If the operator has not taken out the bobbin case 2X and the bobbin case 2Y in the shuttle, the rotary arm 70 is located at a position facing the shuttle 1 so that the rotary arm 70 has the same number of steps as above. Return to the home position.
If the origin is not detected in the same number of steps, that is, if there is a fear that the bobbin case 2X and the bobbin case 2Y in the shuttle are removed, an error display window, a warning buzzer, or other display means 316 displays an error. Then, the intervention of the operator is prompted and the process proceeds to step 19.

When the rotating arm 70 is retracted by the same number of steps (step 16) as described above, it is determined whether or not the bobbin case 2X is at the origin position. It may be determined whether or not the bobbin case 2Y is taken out.

In step 19, the rotating arm 70 is rotated to make the bobbin case 2X face the dummy shaft 6, and then it is moved forward to pass the bobbin case 2X to the dummy shaft 6 and proceed to step 20. In step 20, Waiting for the operator's intervention, the bobbin check, residual thread removal processing and resetting are performed by the operator. At this time, the operator can take out the bobbin case held by the dummy shaft 6 without turning the palm of the hand by inserting the hand from the rotating arm side. The bobbin case can be attached to the dummy shaft 6 by inserting the hand from the rotating arm side and pushing the bobbin case into the dummy shaft 6 without turning the palm in the same way as when attaching the bobbin case to the inner hook shaft 5. .

When the bobbin case is mounted on the dummy shaft 6 in this manner, the bobbin case holding means is opposed to the dummy shaft 6 and then moved forward to move the bobbin case held by the dummy shaft 6 to the bobbin case. The gripping means grips it, then retracts it and proceeds to step 21. In step 21, the same bobbin winding process, yarn hooking process, and thread trimming process described in step 11 above are performed, and the process proceeds to step 22. In step 22, the sewing machine power switch 30 similar to that described in step 12 above is used.
When it is determined that the sewing machine power switch 302 is off during the bobbin thread winding processing operation in step 21, the bobbin thread winding processing operation in step 21 is stopped midway and thread hooking and thread cutting are performed. Processing is performed), the process proceeds to step 18. On the other hand, if it is not detected that the sewing machine power switch 302 is off during the bobbin thread winding process operation of step 21, the process proceeds to step 23, and in step 23, the above step 13 is performed. It is determined whether the bobbin thread winding stop switch 309 is turned on in the same manner as described in step 2, and step 2
Lower bobbin winding stop switch 309 during the first bobbin winding processing operation
Is detected (at this time, the bobbin thread winding processing operation of step 21 is stopped in the middle and thread hooking and thread cutting processing is performed), the process returns to step 22 and the operator turns on the sewing machine power switch 302. Wait for off.

On the other hand, if it is determined in step 23 that the bobbin thread winding stop switch 309 is off, the process proceeds to step 24, and in step 24, the bobbin case containing the bobbin that has been subjected to the respective processes in steps 20 and 21. To the hook 1.

Similarly, for the other bobbin case, after performing the processing of step 19 and step 20, the process proceeds to step 11 described above, and in step 11, the bobbin thread winding processing for the other bobbin case is performed. , Threading processing and thread cutting processing are performed. Then, the subsequent operations are similarly performed.

As described above, in this embodiment, the operations of the bobbin exchanging device 160, the residual yarn removing device 161, the bobbin thread winding device 162, the yarn hooking device and the thread trimming device, which constitute the automatic bobbin thread supplying device, are performed. Even if the power is cut off unexpectedly (by the sewing machine power switch 302), the power supply energization control device 450 completes the processing operation of the device that is operating when the sewing machine power switch 302 is cut off. If there is a necessary processing operation before the bobbin replacement scheduled to be performed subsequent to the processing operation, the processing operations are sequentially completed to enter the bobbin replacement standby state, and then the power to each device is cut off. It is designed to prevent malfunctions and to shut down the power supply arbitrarily. It protects each device that composes the automatic bobbin thread feeder when the power is cut off, and prevents thread entanglement. So that the can be avoided in advance the condition.

Further, particularly in the present embodiment, the power supply energization control device 450 constantly monitors the operation of each device constituting the bobbin thread automatic feeding device, and the sewing machine power switch 302 is operated during the processing operation by the bobbin winding device 162. When either the off state or the bobbin thread winding stop switch 309 is detected, the processing operation of the bobbin thread winding device 162 is immediately stopped. When it is used as the yarn supply source 200, it is immediately rewound and the removing operation can be performed in a shorter time than that when it is completely wound. When moving or returning home, the operator is not bound to the place, so the loss time and the operator It has to be able to reduce the time.

Further, the present embodiment has the following effects. That is, when the power supply energization control device 450 completes the processing operation of the device that is operating when the sewing machine power switch 302 is shut off, and then there is a processing operation necessary before bobbin replacement that is scheduled to be performed following this processing operation, The processing operations are sequentially completed to enter the bobbin replacement standby state, and then the power to each device is cut off, so that the bobbin replacement can be immediately executed when the sewing machine power switch 302 is turned on again. The loss time of the device can be reduced.

Further, by the power supply energization control device 450,
After the bobbin exchange standby state is given, an operation command is given to the bobbin exchange device 160 to move the bobbin case, which has been subjected to the processing necessary for bobbin exchange, to a position where the bobbin case approaches and faces the hook 1, and then the power to each device is cut off. Therefore, during the power-off, it is difficult to perform manual intervention on the bobbin case and the bobbin in the shuttle, and the waiting bobbin case and the bobbin held by the bobbin exchanging device 160 after the processing required for bobbin exchange is performed. The possibility of continuing the processing operation after the sewing machine power switch 302 is turned on again can be improved.

Further, by the power supply energization control device 450,
When the sewing machine power switch 302 is turned on again, a predetermined movement operation command is given to the bobbin exchanging device 160, and the movable parts (the rotating arm 70, the bobbin case gripping means, etc.) of the bobbin exchanging device 160 according to this movement operation command are moved. Based on the movement, the manual intervention determination means 800 performs the necessary processing for bobbin case and bobbin replacement in the shuttle before the sewing machine power switch 302 is turned on again.
When it is determined whether or not human intervention is performed on the waiting bobbin case and the bobbin gripped by 60, and when it is determined that human intervention is performed, the operator performs a check, and when it is determined that human intervention is not performed. Since the continuation process is continued, it is possible to prevent the occurrence of problems after the sewing machine power switch 302 is turned on again and to improve the automation rate.

Further, the interruption information storage means (RAM) 112.
Based on the normality / abnormality information of the power shutoff stored in the table, it is determined whether or not the normal power shutoff process is performed, and if it is abnormal, it is displayed on the display means 316. Therefore, the error check work and the recovery work are performed. Is very easy to do.

24 to 26 are flow charts showing the flow of the control operation procedure of the lower thread automatic feeder according to another embodiment of the present invention. In this embodiment, when the energization timing control means 315 receives the off detection signal of the sewing machine power switch 302, the energization timing control means 315 completes the processing operation of the device that is in the middle of operation at the time when the power is cut off and puts it in the standby state. The command signal is sent to each of the control means 401 and 40 described above.
2 and 403 respectively.

Next, the control operation of the lower thread automatic feeder using such a controller will be described with reference to the flow charts shown in FIGS. Considering the ease of understanding, the explanation will be given from the start of the sewing operation.

First, as shown in FIG. 25, when the RAM (nonvolatile memory) 308 is cleared in step 7, the operation of the lower thread automatic feeder is started. Then, in step 8, it is determined whether or not the bobbin is being attached / detached, and if it is confirmed that the bobbin is being attached / detached, a flag indicating that the bobbin is being attached / detached is written in the RAM 308 in step 9, and if the bobbin is not attached / detached. In step 10, the above flag is cleared.

Next, in step 11, it is judged whether or not the bobbin is being conveyed, and when it is confirmed that the bobbin is being conveyed, a flag indicating that the bobbin is being conveyed is written in the RAM 308 in step 12 and the bobbin is being conveyed. If not, the flag is cleared in step 13. Further, in step 14, it is judged whether or not the bobbin residual thread is being removed. If it is confirmed that the bobbin residual thread is being removed, a flag indicating that the bobbin residual thread is being removed is written in the RAM 308 in step 15, and the bobbin is also removed. If the residual thread is not being removed,
In step 16, the flag is cleared. Furthermore, in step 17, it is determined whether or not the bobbin bobbin thread is being wound, and if it is confirmed that the bobbin bobbin thread is being wound, a flag indicating that the bobbin bobbin thread is being wound is written in the RAM 308 in step 18, and If the bobbin bobbin thread is not being wound, the flag is cleared in step 19.

That is, if all of the above flags have been cleared, it has been confirmed that the operation of the automatic bobbin thread feeder has been normally completed. Following the confirmation of this normally completed operation, in step 20, the sewing machine power supply is turned on. Switch 3
02 is checked by the sewing machine power source monitoring means 301. If the sewing machine power is on, the bobbin winding stop switch 309 is determined in step 21.
Is turned on, and if it is turned off, the process returns to step 8 and the above operation is repeated. However, when it is confirmed that the sewing machine power is turned off, the next step 22 shown in FIG. After that, the power cutoff operation is executed.

In this power shut-off operation, as shown in FIG. 26, first, at step 22, it is judged whether the power is shut off while the bobbin is being loaded into or removed from the shuttle. 23, the bobbin attachment / detachment processing is continued by the energization timing control means 315, and is maintained in the standby state as it is after the processing operation is completed. If the power is not cut off while the bobbin is being attached to or removed from the shuttle 1, the process proceeds to the next step 24.

In step 24, it is determined whether the power is cut off during the bobbin transfer (during the rotation of the rotating arm 70). If so, the process proceeds to step 25, where the energization timing control means 315 sets the target. The bobbin transporting process is continued to the position, and after completion of the processing operation, the bobbin carrying process is maintained in the standby state. If the power is not shut off during the bobbin transport, the process proceeds to the next step 26.

Further, in step 26, it is judged whether or not the power supply is cut off during the bobbin residual thread removal. If yes, the process proceeds to step 27, in which the energization timing control means 315 continues the residual thread removal operation, After the operation is completed, the standby state is maintained as it is. If the power is not cut off while removing the bobbin residual thread, the next step 28
Proceed to.

In step 28, it is judged whether or not the power is cut off during bobbin bobbin winding, and if so, the process proceeds to step 29. In addition, the above step 21
In step 29, when the bobbin thread winding stop switch 309 is turned on, the energization timing control means 315 suspends the bobbin thread winding processing operation in step 29, as in the previous embodiment. Similarly, after the thread hooking process and the thread trimming process are performed, the standby state is maintained and the process proceeds to step 31. In step 31, the relay 303 is turned off and the power of the device itself is cut off.

On the other hand, when the bobbin bobbin thread is not wound and the bobbin thread automatic feeder is not in operation, or when the bobbin bobbin thread is maintained in the standby state in the above steps 23, 25 and 27, In step 30, the current state is RAM (nonvolatile memory) 30.
8 is stored in the RAM 308 as well as the fact that the normal power-off process is performed. Then, in the next step 31, the relay 303 is turned off to cut off the power supply of the apparatus itself.

After that, when the sewing machine power switch 302 is turned on again, the process returns to step 1 shown in FIG.
First, information about the state at the time of power shutdown in the previous time and whether or not a normal power shutdown process has been performed is read from the RAM 308.

Next, at step 2, it is judged whether or not the normal power-off processing has been performed last time, and if it is the normal power-off processing, the routine proceeds to step 3, and if it is not, for example, unexpectedly. If the power supply is not normally shut down due to a power failure or the like, or the sewing machine power switch 302 is turned off or the bobbin winding stop switch 309 is turned on during the bobbin winding processing operation, the process proceeds to step 5.

In step 3, the initialization operation is executed in the most efficient manner based on the state at the time of the previous power-off. When it is confirmed in step 4 that the initialization operation is normally completed, the process proceeds to step 7, and when it is not normal, the process proceeds to step 5.

At step 5, an error is displayed by a warning buzzer or the like, and the operator is prompted to check the device and remove the defect. At this time, by referring to the processing completion flags of the respective devices 160, 161, 162 of the automatic bobbin thread feeder described above, which device of the automatic bobbin thread feeder has an error is displayed. It is possible to perform check work and restoration processing work.

Then, in step 6 after such operator check, the initialization operation is executed again, and the error confirmation operation of the initialization operation is performed in step 4.

Then, as described above, step 7 (see FIG.
5), the RAM (nonvolatile memory) 308 is cleared, the operation of the automatic bobbin thread feeder is started, and the sewing operation is executed. Hereinafter, the same operation is repeated.

As described above, in the present embodiment, the bobbin exchanging device 160, the residual yarn removing device 161, the bobbin thread winding device 162, the bobbin thread winding device, and the bobbin thread forming device which constitute the bobbin thread automatic supplying device are controlled by the power supply energization control device 450. Even if the power is cut off unexpectedly (by the sewing machine power switch 302) during the operation of each device of the cutting device, the power supply energization control device 450 can be used to switch the device that is operating when the sewing machine power switch 302 is cut off. Since the operation process is completed and put in the standby state, problems such as yarn entanglement can be prevented and the power can be cut off arbitrarily. It protects and avoids problems such as thread entanglement in advance.

As in the previous embodiment, the sewing machine power switch 302 is operated during the processing operation by the lower thread winding device 162.
Is detected or the bobbin thread winding stop switch 309 is turned on, the processing operation of the bobbin thread winding device 162 is immediately stopped. When it is used as the lower thread supply source 200, it is immediately rewound, and its removing operation can be performed in a shorter time than that when it is completely wound. When moving to or returning home, the operator is not restrained on the spot, and therefore the loss time and the restraint time of the operator can be reduced.

Although the invention made by the present inventor has been specifically described based on the embodiments, the invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say, for example, in the above embodiment, during the bobbin winding process operation,
When either one of the turning-off of the sewing machine power switch 302 and the turning-on of the bobbin thread winding stop switch 309 is detected, the processing operation of the bobbin thread winding device 162 is immediately stopped, and the thread hooking processing,
Although the relay 303 is turned off after performing the thread cutting process, the relay 303 may be turned off after performing the thread hooking process, or the thread cutting process is performed without performing the thread hooking process. The relay 303 may be turned off later, or the relay 303 may be turned off immediately without performing threading processing and thread cutting processing.

In the above embodiment, the processing operation of the lower thread winding device 162 is immediately stopped when the sewing machine power switch 302 is detected to be off or the lower thread winding stop switch 309 is detected to be on. However, the present invention is also applicable to a device in which the bobbin thread winding stop switch 309 is not provided, and in such a case, the control operation described above is performed only by turning off the sewing machine power switch 302. become. When the bobbin thread winding stop switch 309 is provided, the control operation described above is performed only when the bobbin thread winding stop switch 309 is turned on, and the control operation described above is performed when the sewing machine power switch 302 is turned off. It is also possible not to perform.

In the present invention, the bobbin exchanging device 160,
At least the lower thread winding device 162 of the residual thread removing device 161, the lower thread winding device 162, the yarn hooking device, and the thread cutting device.
The same can be applied to a device provided with the other one and the same effect can be obtained.

[0136]

As described above, according to the bobbin thread automatic feeder of the present invention, the power supply energization controller constantly monitors the operation of the devices constituting the bobbin thread automatic feeder, and the sewing machine power is turned off. Then, the processing is continued until the prescribed processing operation is completed, and problems such as yarn entanglement are prevented and the power can be cut off arbitrarily. It is possible to prevent the troubles such as yarn entanglement in advance, and it is possible to improve the reliability of the lower thread automatic feeder.

Further, the power supply energization control device constantly monitors the operation of the device constituting the lower thread automatic feeding device, and detects the turning off of the sewing machine power as described in claim 1 during the processing operation by the lower thread winding device. Or when it detects that the bobbin winding stop switch, which is desired to stop the bobbin winding operation on the way, is turned on, the processing operation of the bobbin winding device is immediately stopped and, for example, an operator mistake ,
If a wrong yarn number or wrong color is used as the bobbin thread supply source, it will be immediately rewound and the removal operation will be completed in a shorter time than if it had been completely wound. For example, when moving to another job or when returning home, the operator is not constrained on the spot, so it is possible to reduce loss time and operator restraint time, and It is possible to improve operating efficiency and handleability.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an automatic bobbin thread feeder according to an embodiment of the present invention.

FIG. 2 is a front view of a bobbin changing device adopted in the same upper and lower yarn automatic feeding device.

FIG. 3 is a plan view of the above bobbin changing device.

FIG. 4 is a right side view showing a direct-acting mechanism portion of the above bobbin changing device.

FIG. 5 is a right side view showing a rotation mechanism portion of the above bobbin changing device.

FIG. 6 is a schematic right side view for explaining dummy positions and dummy shafts of the bobbin changing device of the above.

FIG. 7 is a top view showing a bobbin drive mechanism and an air guide mechanism of the lower thread winding device adopted in the same upper and lower thread automatic feeding device.

FIG. 8 is a front view of the same bobbin drive mechanism and air guide mechanism.

FIG. 9 is a front view showing a yarn supply detection mechanism of the same upper and lower yarn winding device.

FIG. 10 is a right side view of the same needle thread supply detecting mechanism.

FIG. 11 is a front view showing a yarn tension varying means of the same upper and lower yarn winding device.

FIG. 12 is a transverse cross-sectional view showing a lower thread suction device of the air guiding mechanism of the above.

FIG. 13 is a perspective view of the above bobbin drive mechanism.

FIG. 14 is an explanatory diagram showing a positional relationship with respect to a bobbin case and a bobbin shaft when a lower thread is entangled with an air nozzle for inserting a lower thread.

FIG. 15 is an explanatory diagram showing the bobbin shaft on the lower thread winding side.

FIG. 16 is an explanatory view showing the positional relationship among the air nozzle of the air guide mechanism, the thread cutting device, and the bobbin case during thread cutting.

FIG. 17 is a perspective view of a bobbin case adopted in the embodiment.

FIG. 18 is a block diagram showing the overall configuration of the apparatus in the above embodiment.

FIG. 19 is a block diagram showing a control system in the same embodiment.

FIG. 20 is a flowchart showing a flow of a control operation procedure of the same upper and lower yarn feeders.

FIG. 21 is a flowchart showing a flow of a control operation procedure of the same upper and lower yarn winding devices.

FIG. 22 is a timing chart for explaining the operation of the same upper and lower thread winding device.

FIG. 23 is a right side view showing only a main part of the bobbin changing device when the power to each device is cut off.

FIG. 24 is a flowchart showing a flow of control operation procedure of the automatic bobbin thread feeder in another embodiment of the present invention.

FIG. 25 is a flowchart following FIG. 24.

FIG. 26 is a flowchart following FIG. 25;

[Explanation of symbols]

 2,2X, 2Y bobbin case 7 bobbin 91 thread trimming device 116 thread hooking device 150 bobbin thread 160 bobbin exchanging device 161 residual thread removing device 162 bobbin thread winding device 200 bobbin thread supply source 302 sewing machine power switch 309 bobbin thread winding stop switch 315 Energization timing control means 450 Power supply energization control device A hook position B, C processing operation position

Claims (2)

[Claims] 1. A residual thread removing device for removing residual thread of a bobbin, a lower thread winding device capable of winding a lower thread from a lower thread supply source on a bobbin, and a bobbin for winding a lower thread wound on a bobbin. A thread hooking device capable of threading a case, a thread cutting device capable of cutting a lower thread wound around a bobbin with respect to a lower thread supply source, a bobbin case accommodating a bobbin at a hook position and each of the above devices. The bobbin changing device movable to the processing operation position, and an automatic bobbin thread supplying device including at least a bobbin winding device and another one of the bobbin exchanging device, and the sewing machine power supply is constantly monitored. When it is turned off, it continues until the predetermined processing operation is completed,
An automatic bobbin thread supplying device including a power supply energization control device for immediately stopping the processing operation of the bobbin winding device when it is detected that the sewing machine power supply is off during the processing operation of the bobbin winding device. 2. A residual thread removing device for removing residual thread of a bobbin, a bobbin winding device capable of winding a bobbin from a bobbin supply source, and a bobbin winding a bobbin wound on the bobbin. A thread hooking device capable of threading a case, a thread cutting device capable of cutting a lower thread wound around a bobbin with respect to a lower thread supply source, a bobbin case accommodating a bobbin at a hook position and each of the above devices. The bobbin changing device movable to the processing operation position, and an automatic bobbin thread supplying device including at least a bobbin winding device and another one of the bobbin exchanging device, and the sewing machine power supply is constantly monitored. When it is turned off, it continues until the predetermined processing operation is completed,
An automatic bobbin thread supplying device comprising a power supply energization control device for immediately stopping the processing operation of the bobbin winding device when it detects that the bobbin winding stop switch is turned on during the processing operation of the bobbin winding device.