JPH08229262A - Bobbin thread winding device - Google Patents

Abstract

PURPOSE: To wind bobbin thread by surely coiling bobbin thread from a bobbin thread supply source around a bobbin shaft even without a bobbin thread supply mechanism for forcedly supplying the bobbin thread, to lower the cost fo a device and to improve reliability. CONSTITUTION: A bobbin thread end part from the bobbin thread supply source is led out by a length LL from the tip 67a required to be coiled around the bobbin shaft and inserted inside a bobbin case 2 from a bobbin case opening part 2A by a thread insertion means G. Then, the bobbin thread end part inserted inside the bobbin case 2 by the thread insertion means G is coiled around the bobbin shaft by the cooperation of a bobbin thread coiling means 68 and bobbin rotation by a bobbin driving means E and the bobbin threads is wound around a bobbin housed inside the bobbin case 2 by rotating the bobbin shaft around which the bobbin thread end part is coiled by the bobbin driving means E. The need of the bobbin thread supply mechanism for forcedly supplying the bobbin thread is eliminated, the bobbin thread 150 from the bobbin thread supply source is surely coiled around the bobbin shaft and bobbin winding is made possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for winding a bobbin on a bobbin.

[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 that performs high-speed sewing work, it is necessary to frequently replace a bobbin wound with a lower thread. is there. Generally, when the bobbin thread is consumed, the sewing machine operation is temporarily stopped, the bobbin case is removed from the hook, the bobbin thread is wound around the bobbin, and the bobbin on which this bobbin thread is newly wound is placed in the bobbin case. A series of operations for accommodating and mounting the bobbin case in the shuttle are performed manually.

[0003]

However, the manual operation of winding the bobbin around the bobbin and the replacement operation of the bobbin case are extremely inefficient and cause a decrease in productivity. Therefore, the present applicant has proposed a device for automatically winding a bobbin and replacing the bobbin in Japanese Patent Application No. 6-285932 filed earlier.
We are trying to solve the above problems.

The bobbin thread winding device described in the specification of Japanese Patent Application No. 6-285932 rotates a payout roller by driving, for example, a payout motor as a payout roller driving means, and the bobbin thread is supplied by the rotation of the payout roller. The lower thread from the source is unwound, and this unwound lower thread is guided to the bobbin case opening by the air guide means.
The bobbin thread guided to the opening of the bobbin case is further unwound by the unwinding roller and is sent into the bobbin case by the air of the air guiding means, and the bobbin thread sent into the bobbin case is rotated by the bobbin driving means. The bobbin shaft is securely entwined with the bobbin shaft so that the bobbin thread can be automatically wound around the bobbin shaft.

Therefore, the bobbin thread fed into the bobbin case is surely entangled with the bobbin shaft, so that the bobbin thread winding device described in Japanese Patent Application No. 4-188688 filed by the applicant of the present invention is compared with the bobbin thread winding device. The upper end of the bobbin case comes out of the bobbin case and entangles, making it impossible to form a good stitch.In some cases, the upper thread may break, or the bobbin thread may not be the winding shaft for rotating the bobbin. It is prevented that the device is wound around and the device must be stopped.

The apparatus described in Japanese Patent Application No. 6-285932 is equipped with the bobbin changing apparatus described in Japanese Patent Application No. 4-188688.
A bobbin case for accommodating a bobbin in which a bobbin thread is automatically wound by the bobbin thread winding device can be automatically attached to a hook, and a bobbin case for accommodating a bobbin with less residual thread is provided. It is also possible to take it out automatically from the pot.

However, this Japanese Patent Application No. 6-28593
The device described in Japanese Patent No. 2 has the following problems. That is, there is a problem in that the apparatus becomes expensive because a feeding motor must be attached.

Even when the driving of the feeding motor is stopped, the feeding roller is excessively rotated by the inertial force, and as a result, the feeding roller is wound around the feeding roller (Japanese Patent Application No. 6-28).
In the specification of No. 5932, the bobbin thread is entangled with other mechanisms, and the bobbin thread tension is abnormally increased. There is also a problem that

Therefore, according to the present invention, even if there is no lower thread feeding mechanism for forcibly feeding the lower thread, the lower thread from the lower thread supply source can be reliably entangled with the bobbin shaft to wind the lower thread, and the lowering of the apparatus can be achieved. It is an object of the present invention to provide a bobbin winding device that is cost effective and highly reliable.

[0010]

In order to achieve the above-mentioned object, a bobbin winding device according to a first aspect of the present invention is provided with a bobbin case having an opening formed at a peripheral edge thereof, and is accommodated in the bobbin case and rotatable. A bobbin which is supported and has a bobbin shaft on which the yarn can be wound, a bobbin drive means for rotating the bobbin in the bobbin case, and a bobbin end portion from the bobbin thread supply source are necessary for entwining the bobbin shaft. The bobbin drive means rotates the bobbin driving means to rotate the bobbin drive means by inserting the thread inserting means that is guided from the tip of the bobbin case into the bobbin case through the bobbin case opening and the bobbin case is inserted into the bobbin case by the thread inserting means. And a bobbin thread entanglement means for entwining the bobbin shaft with the bobbin shaft by rotating the bobbin shaft having the entwined bobbin thread end portion by the bobbin drive means. It made it possible winding the bobbin thread to have been the bobbin.

In order to achieve the above object, a bobbin winding device according to a second aspect of the present invention is the same as the above first aspect, and further includes a yarn inserting means.
The bobbin thread from the bobbin thread supply source is guided to the bobbin case opening according to the guide path, and the bobbin thread end portion of a length necessary for entwining with the bobbin shaft is led out from the tip of the bobbin case. It is characterized in that the yarn end portion is air guiding means capable of guiding the yarn end portion into the bobbin case from the bobbin case opening portion by air.

According to a third aspect of the present invention, in addition to the first aspect, the lower thread winding device has a lower thread entanglement means inserted into the bobbin case by a thread insertion means. It is characterized in that it is an air means for forming an air flow in the bobbin case so that the portion is entangled with the bobbin shaft.

In order to achieve the above object, in a bobbin winding device according to a fourth aspect, in addition to the first aspect, a bobbin thread wound around a bobbin shaft and led out from a bobbin case opening is threaded onto a bobbin case. A thread hooking means is provided which can be hooked and pulled out from the lower thread tension spring.

According to a fifth aspect of the present invention, in addition to the first or fourth aspect of the present invention, in the bobbin case, a lower thread wound around a bobbin shaft and led out from the bobbin case is provided. A cutting means is provided for cutting the bobbin case by leaving a predetermined amount by relative movement, and the bobbin shaft is entwined with the bobbin thread at a distance between the bobbin thread cutting point and the tip of the thread insertion means when the bobbin case is cut by the cutting means. It is characterized in that it is designed to match the length required for

According to a sixth aspect of the present invention, in addition to the first aspect, the bobbin thread winding device separates the tip of the yarn inserting means from a work position near the bobbin case opening and from this work position. The moving means is provided so as to be movable to the retracted position, and the tip of the yarn inserting means is moved away from the working position by this moving means to wind the bobbin around the bobbin shaft.

According to a seventh aspect of the present invention, in addition to the fourth aspect, the bobbin thread winding device separates the tip of the yarn inserting means from the work position near the bobbin case opening and the work position. The moving means is provided so as to be movable to the retracted position, and the tip of the yarn inserting means is moved away from the working position by this moving means to carry out yarn hooking.

In order to achieve the above object, in a bobbin winding device according to an eighth aspect, in addition to the fifth aspect, the tip of the thread inserting means is separated from the work position near the bobbin case opening and the work position. The moving means is provided so as to be movable to the retracted position, and the lower end of the yarn inserting means is moved away from the working position by this moving means to perform bobbin thread cutting.

In order to achieve the above object, a bobbin winding device according to a ninth aspect of the present invention is the same as the bobbin winding device according to any one of the sixth to eighth aspects, wherein the position of the tip of the yarn inserting means is set to the working position and the retracted position. It can be set variably between and.

In order to achieve the above object, in the bobbin winding device according to a tenth aspect of the present invention, in addition to the third aspect, the air blowing direction by the air means is a line segment connecting the center of the bobbin shaft and the tip of the air means. Is also located on the bobbin winding side of the outer circumference of the bobbin shaft.

In order to achieve the above object, a bobbin winding device according to an eleventh aspect of the present invention comprises, in addition to the first aspect, a lower thread entanglement detection means for detecting entanglement of a bobbin with a bobbin shaft. The entanglement of the bobbin with the bobbin shaft can be detected based on the output of the yarn entanglement detection means.

In order to achieve the above object, a bobbin winding device according to a twelfth aspect of the present invention is the same as that of the eleventh aspect, in the case where the lower thread entanglement detecting means does not detect the entanglement of the lower thread with the bobbin shaft. The feature is that the operation required for entanglement of the lower thread with the bobbin shaft is performed again or as it is.

[0022]

According to the bobbin winding device of the first aspect,
The length of the bobbin thread from the bobbin thread supply source is the length required for the bobbin shaft to be entangled by the thread inserting means, is led out from the tip, and is inserted into the bobbin case through the bobbin case opening. The bobbin thread end inserted in the case is entangled with the bobbin shaft by the cooperation of the bobbin thread entanglement means and the bobbin rotation by the bobbin drive means, and the bobbin shaft with the bobbin thread entangled by the bobbin drive means rotates. Then, the bobbin is wound around the bobbin stored in the bobbin case. Therefore, the bobbin thread from the bobbin thread supply source is reliably entangled with the bobbin shaft to wind the bobbin thread even if there is no bobbin thread delivering mechanism forcibly delivering the bobbin thread.

According to the bobbin winding device of claim 2,
The bobbin thread from the bobbin thread supply source is guided to the bobbin case opening according to the guide path by using the thread insertion means of claim 1 as the air guide means, and the tip of the bobbin shaft has a length required to be entangled with the bobbin shaft. From the bobbin case and the guided lower thread end is guided by air from the bobbin case opening into the bobbin case.

According to the bobbin winding device of claim 3,
A bobbin thread end portion inserted into the bobbin case by the thread inserting means by using the bobbin thread entanglement means as air means cooperates with air flow by the air means and bobbin rotation by the bobbin driving means. Entangles with the bobbin shaft.

According to the bobbin winding device of claim 4,
The bobbin thread wound around the bobbin shaft and drawn out from the opening of the bobbin case is hooked on the bobbin case by the thread hooking means and drawn out from under the bobbin thread tension spring.

According to the bobbin winding device of claim 5,
A bobbin thread wound around a bobbin shaft and led out from the bobbin case, wherein a bobbin thread led out from an opening of the bobbin case in claim 1 and a bobbin thread led out from a bobbin thread tension spring under the invention. The thread is cut by the cutting means that moves relative to the bobbin case, leaving a predetermined amount (the length required to form a stitch due to the entanglement with the upper thread) from the bobbin case.
Since the distance between the bobbin thread cutting point and the tip of the thread inserting means at the time of cutting by the cutting means is substantially equal to the length required to entangle the bobbin thread with the bobbin shaft, the thread inserting means After the bobbin thread is cut, a bobbin thread of a length necessary to entangle the bobbin thread with the bobbin shaft is always drawn out from the tip of the. Therefore, the bobbin thread from the bobbin thread supply source can still be reliably entangled with the bobbin shaft even without a bobbin thread delivering mechanism forcibly delivering the bobbin thread.

According to the bobbin winding device of claim 6,
When the bobbin thread is wound around the bobbin shaft, the tip of the thread inserting means is moved away from the working position by the moving means. Therefore,
The distance between the tip of the thread inserting means and the bobbin shaft is lengthened so that the bobbin thread is wound substantially uniformly over the entire bobbin shaft.

According to the bobbin winding device of claim 7,
When the bobbin thread drawn out from the opening of the bobbin case is hooked on the bobbin case, the tip of the thread inserting means is moved away from the working position by the moving means. Therefore, the tip of the thread inserting means and the thread hooking means do not interfere with each other.

According to the bobbin winding device of claim 8,
When performing bobbin thread cutting, the tip of the thread inserting means is moved away from the working position by the moving means. Therefore, the tip of the yarn inserting means does not interfere with the cutting means.

According to the bobbin winding device of claim 9,
Since the position of the tip of the thread inserting means is variably set between the working position and the retracted position, for example, at the time of bobbin thread cutting, the bobbin thread cutting point at the time of cutting by the cutting means and the thread inserting means The tip of the thread inserting means is set between the working position and the retracted position so that the distance between the tip and the tip substantially coincides with the length required to entangle the bobbin thread with the bobbin shaft. Further, for example, when winding the bobbin thread, the tip of the thread inserting means is moved to the retracted position so that the distance between the bobbin axis and the bobbin shaft is maximized, and the bobbin thread is wound most uniformly over the entire bobbin shaft. To be done.

According to the bobbin winding device of the tenth aspect, the air blowing direction by the air means is closer to the bobbin shaft outer periphery than the line segment connecting the center of the bobbin shaft and the tip of the air means. Therefore, the bobbin thread inserted into the bobbin case is entangled with the bobbin shaft satisfactorily due to the cooperation of the air and the rotation of the bobbin shaft.

According to the bobbin winding device of the eleventh aspect, since the entanglement of the bobbin with the bobbin shaft is detected by the bobbin entanglement detecting means, the entanglement and the subsequent entanglements are, for example, the bobbin winding amount. Can be detected as

Further, according to the bobbin winding device of the twelfth aspect, if the entanglement of the bobbin thread with respect to the bobbin shaft is not detected by the bobbin thread entanglement detecting means, the operation necessary for the entanglement of the bobbin thread with the bobbin axis is performed again. Or done as is. Therefore,
This operation increases the possibility that the bobbin thread will be entangled with the bobbin shaft.

[0034]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIG. 20, the automatic bobbin thread feeder of this embodiment includes a bobbin thread winding device 162, a residual thread removing device 161, and a bobbin thread winding position C and residual thread removing device 162 of these bobbin thread winding devices 162. A bobbin exchanging device 160 capable of moving the bobbin case 2 to a bobbin case attaching / detaching position D of the bobbin case attaching / detaching position A of the hook 16 (bobbin case attaching / detaching position) 16 of the dummy shaft 6 is schematically shown. The automatic bobbin thread feeder is provided below the sewing machine bed 101. . First, the bobbin changing device 160 will be described below with reference to FIGS. 21 to 25.

21 to 25, reference numeral 1 is a hook on which the bobbin case 2 is mounted, 1a is a hook shaft, and 3 is a stand on a main base attached to the main body of the sewing machine. Each of the base plates as a support body is shown, and 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.
Is cantilevered by the base plate 3.

On the tip 4b side (opposite to the base plate side) of the conveying shaft 4, the conveying block 12 is formed so that the outer peripheral surface of the hollow cylinder is cut at two locations along the axial direction so that the cut surfaces face each other. (See FIG. 21) is rotatably and slidably supported on the transport shaft 4.

To each cut surface of the transport block 12, one plate-shaped portion of the transport plates 10, 10 bent into an L-shape is fixed, and the other of the L-shaped transport plates is formed. As shown in FIG. 21, the plate-shaped portions of the are opposed to each other with the axis interposed therebetween.

One end of each of the holders 11 and 11 bent toward the shuttle along the axial direction is fixed to each of the carrier plates 10 and 10, and the other of the holders 11 and 11 is fixed. A bobbin case gripping means (not shown) capable of gripping or releasing the bobbin case is fixed to each end (end facing the shuttle). As the bobbin case gripping means, for example, an automatic bobbin thread feeder of Japanese Unexamined Patent Publication No. 5-192476 or Japanese Patent Application No. 5-12196 previously filed by the present applicant.
The automatic bobbin thread automatic threading machine of Japanese Patent Application No. 5-116363 filed by the applicant of the present application, including a pair of electromagnet adsorption heads described in the automatic bobbin thread feeder of the sewing machine of No. 0 specification. Appropriate ones such as those using the lever claws described in the supply device can be adopted, and the point is that the bobbin case 2 may be an opposing member (for example, the shuttle 1) if necessary.
Anything that can be attached to and detached from is acceptable.

A rotary gear 13 is fixed to the outer periphery of the transfer block 12, and the rotary gear 13 has a long drive shape in the direction of the shuttle shaft 1a as shown in FIG. The gear 19 is meshed. The drive gear 19 has one end attached to the motor fixing plate 2 attached to the base plate 3.
1 is rotatably supported by a portion protruding toward the other end of the transport shaft, and the other end is directly connected to the output shaft of the rotary motor 20 fixed to the motor fixing plate 21.

Therefore, when the rotation motor 20 rotates, the transfer block 12 is moved through the drive gear 19 and the rotation gear 13.
Also, a rotating arm 70 as a rotating means composed of the transport 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 at the retracted position (see FIGS. 22 to 24). Further, the transport shaft 4 is cantilevered, but since it is guided by the drive gear 19, its supporting strength is sufficient.

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.

This linear motion collar 14 has a structure shown in FIGS.
3, one end of a rack 16 movably supported in parallel with the shuttle shaft 1a is fixed, and a pinion 17 is meshed with the other end of the rack 16. The pinion 17 is a moving motor 1 attached to the base plate 3.
It is fixed to 8 output shafts.

Therefore, when the moving motor 18 is driven, the linear motion collar 14, together with the rack 16 through the pinion 17,
The rotating arm 70 is configured to move along the axial direction of the transport shaft 4. 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 transport 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. As shown in FIGS. 21 and 22, a sensor plate 32 is fixed to the rotating arm 70, and when the rotating arm 70 rotates, the sensor plate 32 causes the light emitting element 31a and the light receiving element 31b to rotate. The positions of the rotation sensor 31, the sensor fixing plate 33, and the sensor plate 32 are adjusted so that the rotation sensor 31, the sensor fixing plate 33, and the sensor plate 32 can pass therethrough.

As shown in FIGS. 21 and 23, a linear motion sensor 41 having the same structure as the rotation sensor 31 is attached to the base plate 3. A sensor plate 15 is fixed to the rack 16 and the rotating arm 70 is attached.
The positions of the linear motion sensor 41 and the sensor plate 15 are adjusted so that the sensor plate 15 can pass between the light emitting element 41a and the light receiving element 41b of the linear motion sensor 41 when the linear motion is performed.

Further, as shown in FIG. 20, at a position opposite to the rotation locus of the bobbin case gripping means on the base plate 3 and directly below the hook 1 at the position D, the dummy shaft 6 as the bobbin case holding means is provided. Is fixed. As shown in FIG. 25, the dummy shaft 6 has the same structure as the inner hook shaft 5, and can hold the bobbin case 2 by pushing the bobbin case 2 containing the bobbin. . 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.

By the way, as shown in FIG. 20, the bobbin thread winding position C and the residual thread removing position B are in a range V below the conveying shaft 4 and from the upright plane along the coaxial line from the sewing machine bed 1.
The range W on the side of the rotation fulcrum 103 when raising 01,
The bobbin case gripping means is arranged at a position opposite to the rotation locus of the holding means. The residual thread removing position B is arranged below the lower thread winding position C. The position of the residual thread removing position B in the transport axis direction (direction perpendicular to the paper surface in FIG. 20) is the retracted position of the bobbin case gripping means, and the position of the lower thread winding position C in the transport axis direction is the bobbin case gripping means. Is at a position slightly advanced from the retracted position (position advanced toward the paper surface in FIG. 20).

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. As long as it is such a thing, for example, Japanese Patent Application No. 5-203610 filed by the applicant earlier, Gantaira 6-4035
Appropriate ones can be adopted including the bobbin residual yarn removing device described in No. 1 specification.

The residual thread removing device is constructed as described above, and since the lower thread which is wound on the bobbin and hangs down from the bobbin case is basically drawn out, its main part is located below the residual thread removing position B. It is located in.

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 a lower thread on a bobbin by driving a motor or the like and then hook the bobbin case 2 and cut the lower thread is adopted. The bobbin winding device 162 will be described below.

This bobbin winding device has a bobbin drive mechanism E as a bobbin drive means for rotating the bobbin. The bobbin drive mechanism E will be described below. In FIG. 1, reference numeral 50 indicates a winding shaft, and the winding shaft 5
0 is rotatably supported on a base (not shown).
A clutch mechanism 5 capable of clutching a plurality of existing holes (see FIG. 14) formed on the bobbin 7 at one end of the winding shaft 50.
0a and the pulley 50b are fixed to the other end, respectively. A bobbin drive motor M2 is also fixed to the base. A pulley 5 is attached to the output shaft of the bobbin drive motor M2.
2 is fixed, and a belt 51 is stretched between the pulley 52 and the pulley 50b.

That is, the bobbin case 2 which has reached the lower thread winding position C by the rotation of the rotating arm 70 is moved by the rotating arm 7.
And the bobbin drive motor M
When the winding shaft 50 rotates when the drive shaft 2 is driven, 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.

The bobbin thread winding device is a mechanism for loosening the bobbin thread 150 from the bobbin winding 200 (see FIG. 4) serving as a bobbin thread supply source, the entanglement of the bobbin thread on the bobbin shaft, and the bottom thread wound on the bobbin. A mechanism for detecting the yarn amount is provided (these are collectively referred to as symbol F). The mechanism F will be described below.
1 to 3, reference numeral 53 indicates a U-shaped base, and a roller shaft 55 is rotatably wound between both side plates 53a and 53b of the base 53. The end portion of the roller shaft 55 on the side plate 53b side projects outward from the side plate 53b, and the roller 54 around which the bobbin thread 150 from the spool 200 is wound (one turn) is fixed to the end portion. ing.

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.

Then, 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 61C of the bobbin drive motor M2 when the two bobbin thread amounts match.

The mechanism F also includes a loosening mechanism for loosening the lower thread 150. This slack eliminating mechanism is rotatably supported by a roller shaft 55 via a bearing (not shown), and the slack eliminating lever 6 has a bobbin thread 150 passed through a hole.
2, a spring 64 for urging the slack eliminating lever 62 in a direction for slackening the lower thread 150, and a stopper 63 for restricting the rotation of the slack eliminating lever 62 by the urging force of the spring 64.
It consists of and.

Further, an air guide mechanism G as a yarn inserting means for guiding the lower yarn 150 from the bobbin 200 to the opening 2A of the bobbin case 2 is provided downstream of the mechanism F (in this embodiment). Is a lower thread entanglement means (air means)
Also doubles). The air guide mechanism G will be described below. In FIG. 1, reference numeral 65 indicates a substantially hollow cylindrical yarn suction device. As shown in FIGS. 1 and 5, the yarn suction device 65 communicates an internal space and the outside with each other from the upstream side. A suction hole 65a facing the downstream side is formed. One end of an air tube 66 communicating with the internal space of the yarn suction device 65 is connected to the upstream side of the yarn suction device 65. An electromagnetic valve 68 is connected to the other end of the air tube 66, and an air source (not shown) is connected to the electromagnetic valve 68. Further, a thread mounting switch (not shown) for turning on / off the solenoid valve 68 is provided.

On the downstream side of the yarn suction device 65, the yarn suction device 6
One end of a rotatable air tube 67 is connected to the yarn suction device 65, which communicates with the internal space of 5. The other end of the air tube 67 is bent into an L shape, and the air nozzle 67a at the tip of the air tube 67 is connected to the opening 2A of the bobbin case 2 in a state where the clutch mechanism 50a and the bobbin 7 are connected. The position is adjusted so as to face. Then, as shown in FIGS. 8 and 9, the tip of the air nozzle 67a stopped at the facing position (at the working position) (the tip of the yarn inserting means; the tip of the air guiding means) in the lower thread guiding direction (air blowing) Direction) is on the bobbin shaft lower thread winding side.

The bobbin shaft lower thread winding side referred to here is
As shown in FIG. 9, 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, the side where the lower thread 150 is entangled with the bobbin shaft 7a ( The reference numeral XX in the drawing).
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 of contacting the outer circumference of the bobbin shaft 7a.

The bobbin thread length (LL) drawn out from the air nozzle 67a is set to a length required to entangle the drawn bobbin thread end 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)]}. Preferably
{(Length from the air nozzle at the working position to reach the outer circumference of the bobbin shaft) + [One round bobbin shaft length x (1.25
.About.1.8)]} is more preferable.

If the length is longer than the above range, it is 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 mm.
Set to. That is, the distance H between the tip of the air nozzle 67a and the opening 2A of the bobbin case 2 is set to 7 mm, and the length 7 m in contact with the bobbin shaft outer periphery from the bobbin case opening 2A.
m and (bobbin shaft circumference 25 mm × 1.64) = 131 mm.

When the solenoid valve 68 is turned on, air is supplied from the air source, and the air is blown from the air nozzle 67a through the air tube 66, the yarn suction device 65, and the air tube 67, and the yarn suction device 65 is discharged. The lower thread end portion inserted through the suction hole 65a is led out from the air nozzle 67a.

At this time, the distance H (see FIG. 8) between the tip of the air nozzle 67a stopped at the facing position (at the working position) and the opening 2A of the bobbin case 2 is preferably 10 mm or less, Particularly preferably, it is 3 to 7 mm. With this range, fluttering of the lower thread 150 due to blown air can be suppressed, and a vortex flow required for the lower thread 150 to be entangled with the bobbin shaft 7a in the bobbin case 2 can be formed.

By the way, an intermediate portion of the air tube 67 is rotatably supported by the base 501 of the lower thread winding device. The air tube 67 is biased in the clockwise direction in FIG. 1 by a spring 570 that constitutes one of the moving means, while the biasing force of the spring 570 follows the operation of a nozzle retraction solenoid 69 that constitutes the other of the moving means. It is rotated in the direction against. Here, in the present embodiment, a latching solenoid is adopted as the nozzle retraction solenoid 69, and the nozzle retraction solenoid 69 is used.
When an ON signal is applied to the spring (see FIG. 6C), the spring 570
The air nozzle 67a against the urging force of the bobbin case 2
6A is retracted and an OFF signal is given to the nozzle retraction solenoid 69 (see FIG. 6D), the air nozzle 67a is moved to the facing position facing the opening 2A of the bobbin case 2 by the biasing force of the spring 570. Moving.

Further, when the bobbin case 2 is set at the bobbin winding position C, around the bobbin case 2, a thread separating member with a moving knife 116 is fixed which constitutes thread hooking means and cutting means ( (See FIG. 10).

As shown in FIG. 11, this thread separator with a moving knife 116 is a V-shaped notch for introducing the lower thread to the front end (front side in FIG. 11) and the rear end (back side in FIG. 11). It has a moving knife plate 116A on which 116C and 116D are respectively formed, and has a V-shaped notch 116
C and 116D are, as shown in FIG. 16 and FIG.
The apex of the cut portion 116C is formed so as to be displaced to the left side in FIG. 11 with respect to the apex of the cut portion 116D. On the upper surface of the moving knife plate 116A, a cutting eye (moving knife) 116E is formed on a line approximately connecting the apex of the cut portion 116C and the apex of the cut portion 116D, and FIG. 10 and FIG. A thread splitting wing 116 with a small gap for allowing the fixed knife 91 shown in FIG.
B is provided. Both the moving knife plate 116A and the yarn separating blade 116B are curved in an arc shape with the winding shaft 50 as the center (see FIGS. 10 and 11), and the thread separating unit with moving knife 116 surrounds the bobbin case 2. Rotating and fixing knife 9
When the position 1 is reached, the positional relationships are adjusted so that the moving knife 116E on the back of the moving knife plate 116A rubs against the tip of the fixed knife 91.

The thread separator 116 with a moving knife is a motor (not shown) capable of forward and reverse rotation through a plurality of gears (not shown).
Is driven to rotate. That is, by driving the motor, the thread separating device with a moving knife 116 is rotated in the forward and reverse directions.

After the bobbin thread is wound and the thread is hooked (details will be described later), the bobbin case 2 has the bobbin thread tension spring 2
D A lower thread cutting point S (specifically, a point at which the moving knife 116E and the fixed knife 91 rub each other) from the lower thread leading hole 2E of the lower thread led out from the lower thread leading hole 2E (see FIGS. 10 and 14). )
Each arrangement of the bobbin case 2, the fixed knife 91, the lower thread cutting point S, etc. is determined so that the bobbin thread length up to 40 mm is the length necessary for forming a stitch by entanglement with the upper thread, that is, about 40 mm. (See FIG. 10).

By the way, the air nozzle 67a can be moved to the work position shown in FIG. 8 and the work position shown in FIG. 10 by the nozzle retraction solenoid 69 as described above. It is in the retracted position during bobbin winding, thread hooking and thread cutting.

When the air nozzle 67a is located at the retracted position, the distance between the bobbin thread cutting point S and the tip of the air nozzle 67a at the time of cutting is as shown in FIG. Each of the bobbin case 2, the bobbin thread cutting point S, the retreat position of the air nozzle 67a, etc. is made to substantially match the length LL (about 55 mm in this embodiment) required to entangle the bobbin thread with The placement has been decided.

Further, above the bobbin case 2 when the bobbin case 2 is set at the bobbin thread winding position C, and below the rotation locus of the thread separating unit 116 with the moving knife, FIG.
2, FIG. 13, and FIGS. 15 to 19, the thread hooking lever 124 is rotatably supported by a step screw 124a in a plane orthogonal to the paper surface of FIG. As shown in FIG. 12, the thread hooking lever 124 has a hook 124A at the tip and a hook 124A.
And an inclined surface 124B that is continuous with and is inclined from the upper side to the lower right side in FIG. The thread hooking lever 124 is biased counterclockwise in FIG. 12 by a torsion spring 125, and is normally in the state shown by the solid line in FIG.

The tip of the winding shaft 50 is shown in FIG.
The front side of the wiper 13 is rotatably supported.
0 is set. The wiper 130 is in the shape of a bar with a bent portion, and is rotated by a rotary air cylinder (not shown). .

Further, between the mechanism F and the bobbin winder 200, as shown in FIG. 4, a thread tension varying means 204 for varying the tension of the lower thread 150 is provided. The thread tension varying means 204 includes a tension spring 205 for pressing the passing bobbin thread 150, a screw 206 for manually adjusting the pressing force of the tension spring 205, and the sewing machine bed 1.
01 and a solenoid SOL that generates a solenoid thrust force against the pressing force of the tension spring 205.

The electric circuit for driving the thread tension varying means 204 has a structure in which a power source V is connected in series to a solenoid SOL and a switch SW is interposed therebetween.

Therefore, when the switch SW 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. When the switch SW is turned on, the solenoid thrust force is generated to the maximum, and the lower thread 150 is applied with the solenoid thrust force subtracted from the pressing force of the tension spring 205, and the lower thread tension is minimized.

When the residual yarn removing device 161 and the bobbin winding device 162 come into contact with the base plate 3 shown in FIGS. 20 to 25, the base plate 3 is appropriately cut. In FIG. 20, the residual thread removing position B, the bobbin thread winding position C, and the bobbin attaching / detaching position D with respect to the dummy shaft 6 are close to each other, and the holding portion 11 is exaggerated. 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.

By the way, in this embodiment, the bobbin case holding means is moved by the moving motor 18 to the bobbin case attaching / detaching positions (hook position; dummy shaft position) A and D and the retracted position (the position opposite to the hook). 21 to FIG. 25). That is, when the bobbin case holding means moves to the retracted position, the sensor plate 15 causes the linear motion sensor 41 to move.
The 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. If it does, it will return 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, dummy position D
In addition, the rotation can be controlled.

Next, the operation of the automatic bobbin thread feeder configured as described above will be described below. First, for example, in order to allow one of the bobbin case gripping means to grip the bobbin case containing the bobbin wound bobbin, a hand is inserted from the rotating arm side to accommodate the bobbin wound bobbin. Similarly to the case where the bobbin case is mounted on the inner hook shaft 5, the bobbin case is mounted on the dummy shaft 6 by pushing it into the dummy shaft 6 without turning the palm. Here, for convenience of explanation,
The bobbin case has a code 2X, and the bobbin case has a code 2Y described below.

Next, when the power switch is turned on, the rotary arm 70 is returned to the original position, and when the start switch is turned on, the rotary arm 70 is rotated so that one bobbin case holding means faces the dummy position D. Let Then, the rotating arm 70 is moved forward so that one bobbin case holding means holds the bobbin case 2X containing the bobbin already wound on the dummy shaft 6.
At this time, the other bobbin case holding means moves toward the shuttle without interfering with any obstacle.

Here, when the dummy shaft 6 is provided at a position opposite to the residual thread removing position B or the bobbin thread winding position C with respect to the transport shaft 4, the residual thread removing position B is set to the above-mentioned position. As described above, the position in the transport axis direction is at the retracted position of the bobbin case gripping means, and the position of the lower thread winding position C in the transport axis direction is at a position slightly advanced from the retracted position of the bobbin case gripping means. When one of the bobbin case gripping means faces the dummy shaft 6, the other bobbin case gripping means collides with the residual thread removing device 161 and the bobbin thread winding device 162. However, in this embodiment,
As described above, since the dummy shaft 6 is arranged at a position directly below the shuttle 1 at a position opposite to the rotation locus of the bobbin case gripping means, there is no problem.

Then, the rotating arm 70 is moved backward and rotated so that one of the bobbin case holding means for holding the bobbin case 2X faces the hook 1 and is moved forward to accommodate the bobbin wound bobbin. Bobbin case 2X
Install in the pot. At this time, the other bobbin case holding means moves toward the dummy shaft 6 without interfering with any obstacle. Then, the rotating arm 70 is retracted. At this time, the worker inserts his / her hand again from the side of the rotating arm in the same manner as described above, and mounts the bobbin case 2Y accommodating the bobbin on which the lower thread has been wound onto the dummy shaft 6.

Next, when the sewing is started, the bobbin wound with the bobbin thread held on the dummy shaft 6 is accommodated in one of the bobbin case holding means by the same operation as above during the sewing. The bobbin case 2Y is gripped and the rotating arm 70 is retracted.

If, for example, a bobbin replacement command is issued because the remaining thread of the bobbin in the shuttle has decreased,
The sewing operation of the sewing machine is prohibited, the bobbin case gripping means that does not grip the bobbin case is advanced, the bobbin case 2X that accommodates the bobbin with less remaining thread is taken out of the hook, and the rotating arm 70 is moved. Retreat.

Next, the rotating arm 70 is rotated to make the bobbin case 2Y containing the bobbin wound bobbin face the hook 1 and move forward to move the bobbin case 2Y containing the bobbin wound bobbin. Then, the rotary arm 70 is retracted.

When the sewing is started, the rotating arm 70 is rotated during the sewing to move the bobbin case 2X accommodating the bobbin in which the residual thread is reduced to the residual thread removing position B. Then, the residual thread removing device 161 there removes the residual thread of the bobbin accommodated in the bobbin case 2X,
The bobbin is an empty bobbin without threads.

Then, the rotating arm 70 is rotated to move the bobbin case 2X containing the empty bobbin into the bobbin winding device 162.
And the rotating arm 70 is moved forward, and the lower thread winding device 162 winds the lower thread around the empty bobbin. Next, the operation of the lower thread winding device 162 will be described below with reference to FIGS. 1 to 19.

First, the bobbin thread 200 and the bobbin thread 150 from the thread tension varying means 204 are wound once around the roller 54, and the bobbin thread wound once is passed through the hole of the loosening lever 62. At this point, the switch SW of the thread tension varying means 204 is turned on to maximize the solenoid thrust to minimize the bobbin thread tension.

Next, the yarn end of the lower yarn 150 is inserted into the suction hole 65a of the yarn 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 necessary for entwining the bobbin shaft with the bobbin shaft, and is about 55 mm in this embodiment. When the lower thread 150 that has been inserted and pushed into the suction hole 65a is conveyed from the thread suction device 65 by air and exposed from the air nozzle 67a and led out,
When the operator manually pulls the bobbin thread from the spool 200 by a necessary amount in advance and loosens it, or when the bobbin thread is manually fed out, the bobbin thread can be more favorably conveyed.

Then, the bobbin case 2 which has reached the lower thread winding position C by the rotation of the rotating arm 70 is moved to the rotating arm 70.
And the bobbin drive motor M
2 is temporarily driven to connect the clutch mechanism 50a and the bobbin 7.

Then, as shown in FIG. 6B, the bobbin drive motor M2 is driven at a low speed to rotate the bobbin at a low speed. Next, as shown in FIG. 6D, an OFF signal is given to the nozzle retraction solenoid 69 to turn off the air nozzle 67a.
Is directed to a work position near the opening 2A of the bobbin case 2, and as shown in FIG. 6A, the solenoid valve 68 is turned on to allow air from the air source to flow into the air tubes 66 and 67.

Then, as shown in FIG. 8, the lower thread end portion led out from the air nozzle 67a is satisfactorily inserted into the bobbin case 2 through the opening 2A of the bobbin case 2 in a state where fluttering or the like is suppressed ( And is guided to the bobbin shaft lower thread winding side XX, and the bobbin shaft 7a is rotated by the rotation of the bobbin shaft 7a and the vortex flow formed by air.
entangle with a.

In this way, when the bobbin thread 150 from the bobbin 200 is entangled with the bobbin shaft 7a, the roller 54 starts to rotate, and the photosensor 60 generates a pulse wave as shown in FIG. 6 (e). Output begins. Then, in the effective bobbin winding amount detecting means 61, when a predetermined number of this pulse wave is counted, it is determined that the bobbin thread 150 is entangled with the bobbin shaft 7a. Here, in the present embodiment, when three pulse waves are detected, the bobbin thread 150 moves the bobbin shaft 7a.
It is decided to be entangled in. The number of pulse waves of three is a value that allows for a safety factor, and is not limited to this number.

When the entanglement of the bobbin thread 150 with the bobbin shaft 7a is detected in this way, the effective bobbin winding amount detecting means 61 counts the subsequent pulse waves as the effective bobbin winding amount. Go. Also, at this time, FIG.
As shown in FIG. 6A, the solenoid valve 68 is turned off to stop the air from the air source, and as shown in FIG.
9 to the air nozzle 67a to turn on the air nozzle 67a.
As shown in FIG.

By the way, when the bobbin thread 150 is not entangled with the bobbin shaft 7a and a pulse wave is not output from the photo sensor 60 as shown in FIG.
As shown in FIG. 7A, the solenoid valve 68 is turned off to stop the air from the air source, and as shown in FIG. 7C, the nozzle retraction solenoid 6 has a slight time lag.
An ON signal is given to 9 to retract the air nozzle 67a to the retracted position and return to the initial state.

Then, as shown in FIG. 7D again, an OFF signal is given to the nozzle retraction solenoid 69 to direct the air nozzle 67a to the working position near the opening 2A of the bobbin case 2, and As shown in FIG. 7 (a), the solenoid valve 68 is turned on to allow air from the air source to flow through the air tubes 66 and 67. That is, the retry operation is performed. In the present embodiment, the retry operation is performed up to three times. If the entanglement of the bobbin thread with the bobbin shaft 7a is not detected even if the retry operation is performed three times, some trouble occurs. When it occurs, an alarm such as an alarm is issued, and an operator can intervene to deal with the defect.

Now, as explained above, the lower thread 150
Entanglement with the bobbin shaft 7a is detected and the air nozzle 67a is retracted to the retracted position as shown in FIG. 10, the bobbin drive motor M2 is accelerated from a low speed to a high speed to lower the bobbin thread 7a. It will be wound around. As described above, when the bobbin thread is wound while the distance between the tip of the air nozzle 67a and the bobbin shaft 7a is lengthened, the bobbin thread 150 is wound substantially uniformly over the entire bobbin shaft 7a. Become.

Then, 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. When both bobbin thread amounts match, a drive stop signal is sent to the driver 61C of the bobbin drive motor M2 to stop the bobbin drive motor M2. 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.

It should be noted that the bobbin drive motor M2 is decelerated from a high speed to a low speed before a predetermined amount of the set bobbin thread winding amount to continue the low speed driving, and the bobbin drive motor M is set at the set bobbin winding amount.
If 2 is stopped, the set lower thread winding amount can be directly used as the actual lower thread winding amount without overrunning the rotation.

When the bobbin thread 150 is automatically wound around the bobbin 7 in this way, the switch SW of the thread tension varying means 204 is turned off to eliminate the solenoid thrust and maximize the bobbin thread tension. Then, the bobbin case 2 is threaded onto the bobbin case 2 by the lower thread 150 drawn out from the opening 2A of the bobbin case 2. This thread hooking operation will be described below.

First, the thread separator 116 with a moving knife is shown in FIG.
A half rotation is performed from the initial position shown in Fig. 16 to rotate it to the position shown in Fig. 16. Then, the lower thread 150 (see FIG. 14) led out from the opening 2A of the bobbin case 2 is caught at the apex of the V-shaped notch 116D, and the bobbin case 2
It moves toward the thread hooking position 2B on the lower thread tension spring side (see FIG. 16).

At this time, the bobbin thread moving toward the thread hooking position 2B contacts the inclined surface 124B of the thread hook lever 124 and pushes the thread hook lever 124 in the traveling direction. As described above, since the torsion spring 125 urges it in the direction opposite to the traveling direction,
As shown in, the lower thread 150 is guided to the slit 2C at the thread hooking position 2B after the thread hooking lever 124 is pushed by a predetermined amount in the traveling direction. After that, the thread separator with a moving knife 116 is rotated half a turn in reverse, and the thread separator with a moving knife 11
Return 6 to its original position (see FIG. 17).

Then, the wiper 130 is rotated about 180 ° from the initial position, as shown in FIG. Then, the thread portion led out from the slit 2C is
The lower thread portion hooked by 30 and entering the slit 2C is guided under the lower thread tension spring 2D and led out from the lead-out hole 2E. Then, the wiper 130 is returned to the initial position.

In the bobbin case 2 used in this embodiment, as shown in FIG. 14, the thread 150 drawn out from the opening 2A is provided with the thread hooking position 2B on the bobbin case 2 on the lower thread tension spring side. Chamfer 2 to make it easier to move to
Although "a" is applied, there is no change in the sewing quality due to the chamfer 2a. In addition, the thread 15 drawn out from the opening 2A
This chamfer 2a may be omitted if 0 moves well to the thread hooking position 2B.

When the thread hooking operation on the bobbin case 2 is automatically performed in this way, then the bobbin thread supplied to the thread hooked bobbin case 2 is cut. First, the switch SW of the thread tension varying means 204 is turned on to maximize the solenoid thrust to minimize the bobbin thread tension.

Next, the thread separator 116 with a moving knife is shown in FIG.
Rotate in the opposite direction to. Then, as shown in FIG. 19, the lower thread 150 led out from the lead-out hole 2E below the lower thread tension spring 8D of the bobbin case 2 has the V-shaped cut portion 1
The yarn is pulled out by being caught at the top of 16C.

The drawn yarn is caught at the apex of the V-shaped notch 116C, and the yarn separating blade 116
B is sorted to the right side in FIG.

Then, the thread separator with a moving knife 116 is further rotated in the same direction. Then, the thread separator with the moving knife 116
The moving knife 116E and the fixed knife 91 face each other, and the lower thread 150 between them is cut (see FIGS. 10 and 19).

That is, as described above, the bobbin case 2 side bobbin thread is pulled out from the lead-out hole 2E below the bobbin thread tension spring 2D by a length necessary for forming a stitch by entanglement with the top thread, that is, about 40 mm. Is cut off.

The bobbin thread on the bobbin winding 200 side has a length L required to entangle the bobbin thread with the bobbin shaft 7a, as described above.
L, that is, about 55 mm is led out from the tip of the air nozzle 67a and cut.

When the bobbin thread cutting operation is automatically performed in this way, the rotary arm 70 is retracted to the standby state, and when the next bobbin replacement command is issued, the sewing operation of the sewing machine is prohibited. , The rotating arm 70 is rotated, and the bobbin case gripping means not gripping the bobbin case is attached to the hook 1.
The bobbin case 2Y accommodating the bobbin with less remaining thread,
The rotating arm 70 is retracted.

Then, the rotating arm 70 is rotated and moved forward, and the bobbin case 2X accommodating the bobbin wound with the lower thread by the lower thread winding device 162 is mounted in the shuttle. Retreat. After that, the above operation is repeated.

By the way, when the bobbin case 2 (2X, 2Y) held by the bobbin case holding means is taken out or the bobbin case 2 of a different color is used,
In the case of temporarily holding the bobbin case 2 on the dummy shaft 6, the bobbin case holding means holding the bobbin case 2 is opposed to the dummy shaft 6 and is moved forward to be held by the bobbin case holding means. The bobbin case 2 that has been used can be transferred to the dummy shaft 6.

When the bobbin case 2 held by the dummy shaft 6 is taken out, if the hand is inserted from the rotating arm side, the palm is returned like the bobbin case 2 taken out from the inner hook shaft 5. Instead, the bobbin case held on the dummy shaft 6 can be taken out. It is very easy to take out the bobbin case from the dummy shaft 6 by this manual work.

As described above, in this embodiment, the length of the LL air nozzle 67a required for the bobbin shaft 7a to be entangled with the bobbin thread end portion from the bobbin 200 by the air guide mechanism G as the thread insertion means. The bobbin case 2 is drawn out and inserted into the bobbin case 2 through the bobbin case opening 2A, and the lower thread end portion inserted into the bobbin case 2 by the air guiding mechanism G is used as air and bobbin driving means as bobbin entanglement means. The bobbin drive motor M2 causes the bobbin shaft 7a to be entangled with the bobbin drive motor M2, and the bobbin drive motor M2 rotates the bobbin shaft 7a with the bobbin thread end entangled so that the bobbin shaft 7a is accommodated in the bobbin case 2. A bobbin 7 may be wound with a bobbin thread and a bobbin thread delivery mechanism for forcibly delivering the bobbin thread as described in Japanese Patent Application No. 6-285932 may be used. Bobbin shaft 7a of the lower thread from the tree 200
The lower thread winding mechanism is not necessary because the lower thread winding mechanism is not required because the lower thread winding mechanism is not necessary. It is possible to improve reliability by eliminating the entanglement of the lower thread.

Further, in this embodiment, as described above, the length LL required to entangle the bobbin thread with the bobbin shaft 7a is derived from the tip of the air nozzle 67a. Therefore, when the bobbin thread is wound around the bobbin case of the next time (the next time and after), the bobbin drive motor M2 is driven at a low speed to rotate the bobbin at a low speed, and the air nozzle 67a is operated. When the solenoid valve 68 is turned on and air from the air source is made to flow to the air tubes 66 and 67 while moving to the position, the bobbin shaft 7a is rotated by the cooperation of the rotation of the bobbin shaft 7a and the vortex flow formed by the air. The lower thread drawn out from the tip of the air nozzle 67a can be entangled. That is, Japanese Patent Application No. 6-285
The bobbin can be automatically wound around the bobbin without a feeding motor such as the device described in Japanese Patent No. 932.

Further, in the present embodiment, the bobbin shaft 7a
Since the tip of the air nozzle 67a is moved away from the working position to the retracted position when the bobbin thread is wound around the bobbin shaft 7a, the bobbin thread 150 is spread over the entire bobbin shaft. It is possible to wind it substantially uniformly over the entire length.

Further, in the present embodiment, when the bobbin case 2 is hooked with the lower thread drawn out from the bobbin case opening 2A, the air nozzle 67a is moved away from the working position to the retreat position, and the air nozzle 67a Since it does not interfere with the thread separator 116 with the moving knife, the reliability of the device can be improved.

Further, in the present embodiment, when the bobbin thread cutting is performed, the air nozzle 67a is moved away from the working position to the retracted position, and the air nozzle 67a and the thread separating device with the moving knife 1 are separated.
Since it does not interfere with 16, it is possible to improve the reliability of the device.

Further, in the present embodiment, the air blowing direction by the air nozzle 67a is set to the lower thread winding side XX on the outer circumference of the bobbin shaft rather than the line segment YY connecting the center of the bobbin shaft and the tip of the air nozzle 67a. Since the bobbin thread inserted in 2 is entwined with the bobbin shaft satisfactorily by the cooperation of the air and the rotation of the bobbin shaft, the reliability of the device can be improved.

Further, in the present embodiment, since the entanglement of the bobbin thread around the bobbin shaft 7a can be detected by the effective bobbin winding amount detecting means 61, the entanglement and subsequent ones are taken as the actual bobbin winding amount. It is possible to detect it, and it is possible to wind the lower thread with high accuracy.

Further, in the present embodiment, if the effective lower thread winding amount detecting means 61 does not detect the entanglement of the lower thread with the bobbin shaft 7a, the operation necessary for the entanglement of the lower thread with the bobbin shaft 7a is performed again or again. Since the operation is performed as it is, and the possibility that the bobbin thread is entangled with the bobbin shaft 7a is increased by this operation, the reliability of the device can be improved.

Furthermore, the apparatus of this embodiment has the following effects. That is, an automatic bobbin thread supplying device is provided in the lower portion of the sewing machine bed 101, and the residual thread removing position B and the bobbin thread winding position C are positions opposite to the rotation locus of the bobbin case gripping means and rotate with the bobbin case gripping means. The residual yarn removing device 161 and the bobbin winding device 16 are arranged in a range V below the transport shaft 4 and in a range W on the side of the rotation fulcrum 103 when the sewing machine bed 101 is raised from the upright plane along the coaxial line.
2 is the rotation locus X on the outer peripheral side when the sewing machine head is raised.
Since it is configured to move away from the inside of the sewing machine, the device (the residual yarn removing device 161, the bobbin winding device 162) in which there is a risk of interference when the sewing machine bed 101 is raised is small and elaborate without making the components small. Since it is possible to prevent interference (contact) with the device, it is possible to reduce the cost of the device and to simplify the assembly work and the work such as wiring and piping and improve the maintainability. It is possible. In addition, since the devices are configured to approach each other in the same manner, it is possible to concentrate wiring, piping and the like, which is advantageous in terms of space, and waste of the rotating operation of the bobbin case gripping means is possible. It is possible to reduce.

Incidentally, as shown in FIG. 20, the lower shaft of the sewing machine is located at a position opposite to the rotation locus of the bobbin case gripping means and above the transport shaft 4 which rotates together with the bobbin case gripping means. Since 104 and 105 are installed close to each other, the lower yarn winding device 162 and the residual yarn removing device 1 are provided in the range.
It is difficult to place 61.

When the bobbin case gripping means is moved in the axial direction to the bobbin case attaching / detaching position (hook position) A, the bobbin case on the opposite side of the bobbin case gripping means in the rotating arm 70 with the transport shaft 4 as the center. Since the gripping means also moves in the axial direction in the same manner, a clearance space that does not interfere with the bobbin case gripping means on the opposite side is required in the movement path of the bobbin case gripping means on the opposite side. The bobbin case gripping means is arranged directly below the shuttle at a position opposite to the rotation trajectory, and the bobbin case gripping means is moved in the axial direction to move to the bobbin case attaching / detaching position (hook position) A and to the dummy shaft 6. In both cases, since the bobbin case gripping means on the opposite side does not interfere with the facing member, the clearance space required when the dummy shaft 6 is provided. Newly provided need is gone.

The residual thread removing device 161 roughly rotates the bobbin by the thread drawing operation of the drawing means for drawing the thread wound around the bobbin and hanging from the thread drawing section of the bobbin case 2. Since it is configured, the main part thereof is arranged below the residual yarn removing position B. Therefore, when the residual thread removing position B and the bobbin thread winding device C are replaced with each other, there is no space for arranging the main part of the residual thread removing device 161, but in the present embodiment, the residual thread removing position B is changed to the bobbin thread winding position. Place it below C and remove residual thread B
Since the lower space is configured to be an empty space, it is possible to dispose the residual yarn removing device by utilizing this empty space. Further, since the residual thread removing position is arranged below the bobbin thread winding position, the residual thread removed by the residual thread removing device is promptly discharged without being entangled with another bobbin thread winding device. Has become.

Although the invention made by the present inventor has been specifically described based on the embodiments, the present 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, by the air guide mechanism G,
The lower end of the bobbin thread from the bobbin 200 is inserted into the bobbin case through the opening 2A of the bobbin case 2 in a state in which the length LL required for entwining the bobbin shaft 7a is derived. Is inserted into a short tubular member, for example, and the inserted lower yarn can be grasped or released by a grasping member, which is required to entangle the lower yarn with the bobbin shaft 7a. Length LL
It is grasped in the pulled-out state and moved to the working position, and thereafter, the bobbin thread is always opened, and the short tubular member is replaced with a mechanism for moving the working position and the retracted position as in the above embodiment. However, it is possible to obtain the same effect as the above embodiment. In the case of such a configuration, an air means for properly guiding the lower thread drawn from the tip of the short tubular member into the bobbin case 2 and entwining it with the bobbin shaft 7a is required.

Further, in the above embodiment, the bobbin shaft 7
With the length LL required for entwining with a inserted in the bobbin case 2, the air by the air guide mechanism G and the bobbin rotation by the bobbin drive motor M2 cooperate to
The bobbin shaft 7a is entwined with the lower thread so that the lower thread can be wound. However, the air can be replaced with, for example, the configuration described in Japanese Patent Application No. 5-239194 filed by the applicant of the present application. is there. That is, the lower thread inserted in the bobbin case 2 is hooked on the key-shaped portion of the key-shaped thread hooking member projectingly formed on the outer periphery of the bobbin shaft 7a according to the low speed rotation of the bobbin drive motor M2, and the bobbin shaft 7a is rotated. Of the thread is inserted into the annular groove formed on the outer periphery behind the thread hooking member so that the groove depth on the thread end side is deeper than that on the bobbin thread supply side, and the thread on the thread end side is made lower than the thread on the supply side. Alternatively, the bobbin thread may be entangled with the bobbin shaft as a result.

Further, the thread inserting means is composed of the above-mentioned short tubular member, and the bobbin thread entanglement means is composed of the thread hooking member and the annular groove. By these both means, the same effect as in the above embodiment can be obtained. It is also possible.

Further, in the above embodiment, the spool 20
The opening 2A of the bobbin case 2 in a state in which the length LL required to entangle the bobbin thread from 0 with the bobbin shaft 7a is derived.
The means for further inserting the bobbin case into the bobbin case, and the bobbin shaft 7a with the lower thread end portion inserted into the bobbin case 2 by this means
Although it is also used as a means for entwining with (integrated as an air guide mechanism G), it is of course possible to provide a separate body.

In the above embodiment, the actual bobbin thread winding amount is detected by the rotation of the roller 54 in order to improve the accuracy of the bobbin thread winding amount. However, although the accuracy is lowered, for example, the bobbin drive motor M2 is used. Alternatively, a rotation detecting device such as an encoder may be provided to detect the amount of bobbin winding by bobbin rotation. Further, the bobbin winding amount detected by the rotation of the bobbin is corrected by, for example, a calculating means (for example, when the winding diameter is increased, the winding length is increased even if the rotation speed is the same). It is also possible to improve the accuracy.

Further, in the above-mentioned embodiment, an application example for cutting the lower thread led out from the lead-out hole 2E under the lower thread tension spring 2D of the bobbin case 2 is described.
It goes without saying that the present invention can also be applied to the case where the lower thread drawn out from the opening 2A is cut without threading.

In the above embodiment, the air nozzle 67a is retracted to the retracted position in order to avoid interference with the thread separating unit with moving knife 116 when threading and bobbin thread cutting. If the structure of the thread cutting means is replaced with the thread separating unit with a moving knife 116 and does not interfere with the air nozzle 67a during thread hooking and bobbin thread cutting, the air nozzle 67a is fixed at the working position. Is also good. When configured in this manner, the distance between the lower thread cutting point at the time of cutting and the tip of the air nozzle 67a is fixed so that the distance is substantially equal to the length required to entangle the lower thread with the bobbin shaft 7a. It is necessary to move the knife 91 and the like.

Further, in the above embodiment, the bobbin case 2 is fixed and the bobbin thread is cut by moving the thread separating member with a moving knife 116, but the thread separating member with a moving knife is fixed. The bobbin case 2 may be rotated, the bobbin case 2 may be moved, or both may be moved to cut the lower thread.

Further, in the above-mentioned embodiment, the thread separator 116 with a moving knife is made to have the functions of thread hooking and bobbin thread cutting, but of course it may be a separate body.

Further, in the above embodiment, the air nozzle 67 is provided by the nozzle retraction solenoid 69 and the spring 570.
Although a can be moved to two positions, a working position and a retracted position, the air nozzle 67a can be variably set between the working position and the retracted position by a stepping motor (in this case, the retracted position). Is farther from the opening 2A of the bobbin case 2 than in the above embodiment). For example, at the time of cutting the lower thread, the distance between the lower thread cutting point S and the tip of the air nozzle 67a at the time of cutting the bobbin shaft 7a. The tip of the air nozzle 67a is set between the working position and the retracted position (the same position as in the above embodiment) so as to approximately match the length required to entangle the lower thread with the lower thread. In this case, the tip of the air nozzle 67a is moved to the retracted position so that the distance between the bobbin shaft 7a and the bobbin shaft 7a is maximized (position farther from the above embodiment), and the bobbin thread is evenly distributed over the entire bobbin shaft. It is also possible to make the times.

In the above embodiment, the bobbin case holding means is the dummy shaft 6, but the bobbin case 2 is not limited to the dummy shaft 6, and the bobbin case 2 is magnetically attracted by a magnet to be housed in the holder. The bobbin case holding means for holding may be replaced.

Furthermore, in the above-described embodiment, when performing the retry operation, the air nozzle 67a is retracted from the work position to the retracted position, and then moved to the work position again, for example, unluckyly winding the bobbin thread around the bobbin shaft. Side XX
The lower thread that has been inserted on the side opposite to the side is once removed and inserted again into the bobbin case 2. However, such a lower thread reinsertion operation is stopped at the working position of the air nozzle 67a. It is also possible to do it as it is. That is,
As shown by the phantom line in FIG. 1, a pair of rollers 600, 600 driven by a drive motor (not shown) so as to be able to rotate in the forward and reverse directions are arranged in the lower thread supply path, and these rollers 6
00 and 600 can be pressed against or separated from the bobbin thread 150, and are normally separated from the bobbin thread 150, and when the retry operation is performed, the bobbin thread 150 is pressed and rotated to wind the bobbin thread. If a predetermined amount of lower thread is fed back into the bobbin case 2 by pulling back a predetermined amount to the 200 side and then rotating the rollers 600, 600 in the reverse direction.
During the retry operation, the working position of the air nozzle 67a can be kept stopped. When the entanglement of the lower thread 150 with the bobbin shaft 7a is detected, the roller 60
It goes without saying that 0,600 is separated from the lower thread 150.

[0139]

As described above, according to the bobbin thread winding device of the first aspect, the length required for the bobbin shaft to be entangled with the bobbin thread end portion from the bobbin thread supply source by the thread inserting means. The bobbin thread is pulled out from the tip and inserted into the bobbin case through the bobbin case opening. The bobbin shaft is entangled by the action, and the bobbin driving means rotates the bobbin shaft in which the bobbin end is entangled to wind the bobbin thread around the bobbin housed in the bobbin case and forcibly feed the bobbin thread. Even if there is no bobbin thread feeding mechanism, the bobbin thread from the bobbin thread supply source is securely entangled with the bobbin shaft so that the bobbin thread can be wound. Min, low cost of equipment Together it is possible, it becomes possible to improve the reliability eliminates such entangled lower thread caused by the lower thread feeding mechanism.

According to the bobbin winding device of claim 2,
The yarn inserting means according to claim 1 is used as an air guide means, and the lower thread from the lower thread supply source is guided to the bobbin case opening along the guide path, and is guided from the tip of the length necessary for entwining with the bobbin shaft, Since the drawn out lower thread end portion is configured to be guided into the bobbin case from the bobbin case opening portion by air, the same effect as that of claim 1 can be obtained.

According to the bobbin winding device of claim 3,
A bobbin is provided, wherein the bobbin entanglement means is an air means, and the bobbin thread end portion inserted into the bobbin case by the thread insertion means is caused to cooperate with the air flow by the air means and the bobbin rotation by the bobbin driving means. Since it is configured to be entwined with the shaft, the same effect as that of claim 1 can be obtained.

According to the bobbin winding device of claim 4,
In addition to claim 1, the lower thread wound around the bobbin shaft and drawn out from the opening of the bobbin case is hooked on the bobbin case by the thread hooking means and drawn out from the lower thread tension spring. In addition to the effect of the first aspect, the thread hooking operation can be automatically performed.

According to the bobbin winding device of claim 5,
In addition to claim 1 or 4, a bobbin thread wound around a bobbin shaft and led out from the bobbin case, wherein in the claim 1, a bobbin thread led out from the bobbin case opening, The bobbin thread derived from the unscrewed bobbin thread tension spring is cut by a cutting device that moves relative to the bobbin case, leaving a predetermined amount (the length required for stitch formation by entanglement with the bobbin thread) from the bobbin case. , The distance between the bobbin thread cutting point and the tip of the thread inserting means at the time of cutting by this cutting means is made substantially equal to the length required to entangle the bobbin thread with the bobbin shaft, Is configured so that a bobbin thread having a length required to entangle the bobbin thread with the bobbin shaft is always drawn out after the bobbin thread is cut. Therefore, in addition to the effect of claim 1 or 4, the bobbin thread is forcibly forced. Even if there is no lower thread feeding mechanism for feeding the lower thread, It becomes possible to automatically and reliably entangled in the bobbin shaft after being.

According to the bobbin winding device of claim 6,
In addition to claim 1, when winding the bobbin around the bobbin shaft,
Since the distal end of the thread inserting means is moved away from the work position by the moving means to increase the distance between the bobbin axis and the bobbin axis, the bobbin thread can be distributed over the entire bobbin axis. It becomes possible to wind it substantially uniformly.

According to the bobbin winding device of claim 7,
In addition to claim 4, when the bobbin thread drawn out from the opening of the bobbin case is hooked on the bobbin case, the tip of the thread inserting means is moved away from the work position by the moving means, and the tip of the thread inserting means and the thread hooking. Since it is configured so as not to interfere with the means, it is possible to further improve the reliability of the device in addition to the effect of the fourth aspect.

According to the bobbin winding device of claim 8,
In addition to claim 5, when the bobbin thread is cut, the tip of the thread inserting means is moved away from the working position by the moving means so that the tip of the thread inserting means does not interfere with the cutting means. In addition to the effect of claim 5, the reliability of the device can be further improved.

According to the bobbin winding device of claim 9,
In addition to any one of claims 6 to 8, since the position of the tip of the thread inserting means can be variably set between a working position and a retracted position, for example, when bobbin thread cutting is performed. Is the tip of the thread inserting means so that the distance between the bobbin thread cutting point and the tip of the thread inserting means at the time of cutting by the cutting means is substantially equal to the length required to entangle the bobbin thread with the bobbin shaft. Can be set between the working position and the retracted position, and when the bobbin thread is wound, for example, the tip of the yarn inserting means is moved to the retracted position so that the distance between the bobbin shaft and the bobbin shaft is maximized. The yarn can be wound most uniformly over the entire bobbin shaft.

According to a tenth aspect of the present invention, in addition to the third aspect, the bobbin shaft outer periphery is set such that the air blowing direction of the air means is more than the line segment connecting the center of the bobbin shaft and the tip of the air means. In addition to the effect of claim 3, since the lower thread is wound on the lower thread winding side and the lower thread inserted into the bobbin case is entangled well with the bobbin axis by the cooperation of air and the rotation of the bobbin axis. Therefore, the reliability of the device can be further improved.

According to the bobbin thread winding device of claim 11, in addition to claim 1, entanglement of the bobbin thread with the bobbin shaft can be detected by the bobbin thread entanglement detecting means. In addition to the effect of item 1, the entangled and subsequent items can be detected as, for example, the bobbin thread winding amount,
It is possible to wind the lower thread with high accuracy.

According to the twelfth aspect of the present invention, in addition to the twelfth aspect, when the lower thread entanglement detecting means does not detect the entanglement of the lower thread with the bobbin shaft, the lower thread wraps with respect to the bobbin axis. The operation necessary for entanglement is performed again or as it is, and the operation is configured to increase the possibility of entanglement of the bobbin thread with the bobbin shaft.
In addition to the effect of 1, the reliability of the device can be further improved.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing the configuration of a lower thread winding device according to an embodiment of the present invention.

FIG. 2 is a front view of a mechanism for detecting both the entanglement of the lower thread and the winding amount of the lower thread of FIG. 1, and a loosening mechanism.

FIG. 3 is a side view showing the mechanism of FIG. 2 together with a control block.

FIG. 4 is a front view of the thread tension varying means applied to the embodiment.

5 is a cross-sectional view of the lower thread suction device of FIG.

FIG. 6 is a timing chart for explaining the operation of the same upper and lower thread winding device.

FIG. 7 is a timing chart for explaining a retry operation of the upper and lower yarn winding device.

FIG. 8 is an explanatory view showing a positional relationship with respect to the bobbin case and the bobbin shaft when the lower thread of the air guide means also serving as the air means is entangled.

FIG. 9 is a view for explaining a bobbin shaft on which the lower thread is wound.

FIG. 10 is an explanatory view showing a positional relationship between an air guide means also serving as an air means and a bobbin case at the time of cutting the lower thread of the tip thereof.

FIG. 11 is a perspective view of a thread separator with a moving knife attached to the same upper and lower thread winding device.

FIG. 12 is a plan view of a thread hooking lever attached to the same upper and lower thread winding device.

13 is a cross-sectional view of FIG.

FIG. 14 is a perspective view of a bobbin case adopted in the embodiment.

FIG. 15 is a side view of an essential part of the lower thread winding device, showing a state in which the lower thread is wound by the upper and lower thread winding device.

FIG. 16 is a plan view of an essential part of the lower thread winding device, which illustrates a lower thread guiding operation to a slit of the bobbin case.

17 is a plan view of an essential part of the lower thread winding device, which illustrates a lower thread guiding operation following the lower thread guiding operation to the slit in FIG. 16. FIG.

FIG. 18 is a side view of the main part of the lower thread winding device, which illustrates the lower thread winding operation under the lower thread tension spring of the bobbin case.

FIG. 19 is a side view of an essential part of the lower thread winding device, which illustrates a lower thread cutting operation.

FIG. 20 is a front view showing a schematic configuration of an automatic bobbin thread feeder to which the same upper and lower thread winding device is applied.

FIG. 21 is a front view of a bobbin changing device used in the same upper and lower thread automatic feeding device.

FIG. 22 is a plan view of the above bobbin changing device.

FIG. 23 is a left side view of the above bobbin changing device.

FIG. 24 is a right side view of the above bobbin changing device.

FIG. 25 is a schematic side view for explaining dummy positions and dummy axes.

[Explanation of symbols]

2, 2X, 2Y bobbin case 2A bobbin case opening 2D bobbin thread tension spring 2E bobbin thread tension spring outlet hole 7 bobbin 7a bobbin shaft 60, 61 bobbin thread entanglement detection means 65, 67 guide path 67a thread insertion means Tip 69,570 Moving means 91 Cutting means 116,124 Thread hooking means 150 Lower thread 200 Lower thread supply source E Bobbin drive means G Thread inserting means (lower thread entanglement means; air guiding means,
Air means) S Lower thread cutting point LL Length required for entwining with bobbin shaft XX Lower thread winding side YY Line segment connecting bobbin shaft center and air means tip

Claims (12)

[Claims] 1. A bobbin case having an opening at its periphery, a bobbin housed in the bobbin case, having a bobbin shaft rotatably supported and capable of winding a thread, and a bobbin in the bobbin case. The bobbin driving means for driving the bobbin and the bobbin thread end from the bobbin thread supply source have a length necessary for entwining with the bobbin shaft and can be inserted into the bobbin case through the bobbin case opening. Means and a lower thread entanglement means for entwining the lower thread end portion inserted into the bobbin case by the thread insertion means with the bobbin shaft in cooperation with the bobbin rotation by the bobbin driving means. A bobbin thread winding device capable of winding a bobbin thread on a bobbin housed in a bobbin case by rotating a bobbin shaft having bobbin thread ends entwined by a bobbin drive means. 2. The bobbin winding device according to claim 1, wherein the thread inserting means guides the bobbin thread from the bobbin thread supply source to the bobbin case opening along the guide path and entangles the bobbin shaft. The lower thread end portion having a required length is led out from the tip thereof, and the drawn lower thread end portion is air guiding means capable of guiding the lower thread end portion into the bobbin case from the bobbin case opening by air. Bobbin winding device. 3. The bobbin winding device according to claim 1, wherein the bobbin thread entanglement means is provided in the bobbin case such that the bobbin thread end portion inserted into the bobbin case by the thread insertion means is entangled with the bobbin shaft. A bobbin winding device characterized by being an air means for forming an air flow. 4. The bobbin thread winding device according to claim 1, wherein the bobbin thread wound around a bobbin shaft and drawn out from the opening of the bobbin case is hooked on the bobbin case and can be drawn out from under the bobbin thread tension spring. A bobbin winding device equipped with a thread hooking means. 5. The bobbin thread winding device according to claim 1 or 4, wherein the bobbin thread wound around a bobbin shaft and led out from the bobbin case,
The bobbin case is provided with cutting means for cutting the bobbin case relative to the bobbin case by moving relative to the bobbin case. A bobbin winding device characterized in that the length is substantially the same as the length required to entangle the thread. 6. The bobbin winding device according to claim 1, further comprising moving means for moving the tip of the yarn inserting means to a working position near the opening of the bobbin case and a retracted position separated from the working position. A bobbin thread winding device configured to move the tip of the thread insertion means away from the work position by the moving means to wind the bobbin thread around the bobbin shaft. 7. The bobbin winding device according to claim 4, further comprising moving means for moving the tip of the yarn inserting means to a working position near the opening of the bobbin case and a retracted position separated from the working position. A bobbin winding device in which the tip of the thread inserting means is moved away from the working position by this moving means to carry out thread hooking. 8. The bobbin winding device according to claim 5, further comprising moving means for moving the tip of the thread inserting means to a working position near the opening of the bobbin case and a retracted position separated from the working position. A bobbin thread winding device configured to move the tip of the thread inserting means away from the working position by the moving means to perform bobbin thread cutting. 9. The bobbin winding device according to claim 6, wherein the position of the tip of the yarn inserting means can be variably set between a working position and a retracted position. Turning device. 10. The bobbin thread winding device according to claim 3, wherein the air blowing direction of the air means is closer to the bobbin shaft outer periphery than the line segment connecting the center of the bobbin shaft and the tip of the air means. A bobbin winding device characterized by: 11. The bobbin thread winding device according to claim 1, further comprising a bobbin thread entanglement detection means for detecting entanglement of the bobbin thread with the bobbin shaft, and the bobbin thread entanglement detection means based on the output of the bobbin thread entanglement detection means. A bobbin winding device that can detect entanglement on the bobbin shaft. 12. The bobbin winding device according to claim 11, wherein when the bobbin thread entanglement detection means does not detect the entanglement of the bobbin thread with respect to the bobbin shaft, an operation necessary for the entanglement of the bobbin thread with the bobbin shaft is performed. A bobbin winding device characterized by being performed again or as it is.