JP2002095884A - Bobbin thread-winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the authenticity of the entwinement of a bobbin thread to a bobbin and the entwinement state and to providing a bobbin thread-winding device with improved reliability since the control of a bobbin thread supply speed and a bobbin thread-winding speed was vague and at the same time the off timing of thread- guiding air was vague, and hence threat-entwining retrial frequently occurred when the bobbin thread is to be entwined, or the entwinement of the thread failed, also the entwinement quality of the thread failed, the thread end entwined the thread at a rear side overlappingly so that remaining thread could not be removed completely when the remaining thread was to be removed, and thread entwinement when winding the thread at a post process became further poor for causing a vicious cycle. SOLUTION: In the bobbin thread-winding device having a bobbin thread- accommodating and leading means for accommodating the thread that is led from the tip of the bobbin thread supply means once and releasing the thread that is accommodated for releasing in entwinement, the bobbin thread that has been accommodated is supplied by intermittently releasing and leading toward the inside of a bobbin case by the bobbin thread accommodating/leading means and at the same time a bobbin is rotated by the bobbin-driving means for entwining the thread to the bobbin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to control of a lower thread feeding mechanism of a lower thread winding device.

[0002]

2. Description of the Related Art A thread supply nozzle having a bobbin thread provided from a bobbin supply source, which can be brought into contact with and separated from a bobbin case opening, a bobbin driving means for rotating a bobbin inside the bobbin case, and a guide by a thread supply nozzle. In cooperation with air guide means for inserting the lower thread to be inserted into the bobbin case, the lower thread winding device for tangling the lower thread of the bobbin shaft of the bobbin accommodated in the bobbin case is inserted into the yarn supply nozzle. It is common to provide a feeding mechanism that feeds out the lower thread from the lower thread supply source side so as to be led out from the nozzle tip.

Conventionally, as shown in JP-A-8-276089 by the present applicant, the lower thread has been derived from the beginning of the length of the thread that was unwound during the previous entanglement from the tip of the nozzle.
In the lower thread supply path between the lower thread supply source and the thread supply nozzle, a delivery mechanism using a delivery roller that rotates by a motor as a drive source and that can deliver the thread on the thread supply source side to the thread supply nozzle side. A proposal has been made.

[0004] However, in the bobbin winding device having the above-described structure, since the bobbin thread having a relatively long length is derived from the beginning, the bobbin thread that is derived from the beginning when the lower thread is entangled. Is entangled with other than the bobbin axis,
Also, the thread may not be securely inserted into the bobbin case due to the effect of resistance due to contact with the thread type or the outer peripheral surface of the bobbin case, or even if inserted, it may be bent and inserted because a predetermined length of thread is drawn out from the beginning. And the reliability of the entanglement of the yarn on the bobbin shaft was lacking.

Accordingly, Japanese Patent Application Laid-Open No. 11-33263 by the present applicant,
As described in JP-A-11-267384, the yarn that has been drawn out from the beginning by turning the wiper is manually stored once, and when the next lower yarn is wound, the wiper is turned again to derive the lower yarn. There has been proposed a lower thread winding device provided with a lower thread storing / leading-out means.

[0006]

In Japanese Unexamined Patent Application Publication No. Hei 8-173671, which has been proposed by the present applicant, the speed of the pay-out motor when the lower thread is fed when the lower thread is entangled is lower than the speed of the thread winding motor. , There is. Further, in JP-A-11-33263, the lower thread is temporarily stored in the thread supply means when the lower thread is entangled, and is slowly released when the lower thread is released again.
There is.

However, as described above, the control of the supply speed of the yarn and the control of the winding speed of the bobbin are both ambiguous. Furthermore, the timing of turning off the yarn guide air was ambiguous. For this reason, depending on conditions such as the type of yarn, retry of yarn entanglement frequently occurs or yarn entanglement fails. In addition, the quality of the yarn entanglement varies, and the yarn on the bobbin shaft is entangled with the rear yarn so as to overlap from above. In addition, the viscous circulation that the yarn entanglement at the time of the yarn winding in the subsequent process is further deteriorated due to the yarn residue that cannot be completely removed has occurred.

Accordingly, an object of the present invention is to provide a bobbin winding apparatus which improves the reliability and the state of entanglement of the bobbin with the bobbin, and improves the reliability.

[0009]

In order to achieve the above object, a bobbin winding device according to claim 1 is provided with a bobbin case having an opening in a peripheral edge, and is housed and rotatable in the bobbin case. , A bobbin having a bobbin shaft capable of winding a yarn, bobbin driving means for rotating a bobbin in a bobbin case, and a yarn from a lower yarn supply source being led out from a leading end, and the A lower thread supply means capable of coming and going near the bobbin case opening for guiding the thread, and a lower thread derived from the tip of the lower thread supply means being inserted into the lower thread supply means from the tip before being entangled with the bobbin shaft. And a lower thread storage / leading-out means for releasing the stored lower thread at the time of entanglement and leading it out of the tip, and intermittently moving the drawn-in lower thread into the bobbin case by the lower thread storage / leading means. Open and out Control means for controlling the supply of the lower thread from the tip of the lower thread supply means into and out of the bobbin case, and rotating the bobbin by means of the bobbin driving means. It is characterized in that the yarn is entangled with the yarn.

In addition, in the bobbin winding device according to the second aspect, the intermittent operation of intermittently releasing and drawing out the lower thread intermittently by repeatedly moving and stopping by the lower thread storing / leading-out means. The stop time is the same or longer than the time.

In addition, in the bobbin winding device according to the third aspect, in addition to the first aspect, the intermittent supply speed of the bobbin thread, which is intermittently released and led out by the lower thread storing and leading means, into the bobbin case, The rotation speed is lower than the rotation speed of the bobbin shaft surface by the bobbin driving means.

A bobbin winding device according to a fourth aspect of the present invention includes a bobbin case having an opening formed in a peripheral edge thereof, and a bobbin shaft housed in the bobbin case and rotatably supported to wind the yarn. A bobbin having; a lower thread supply means capable of approaching / separating in the vicinity of the bobbin case opening for guiding the thread into the opening from an end capable of approaching / separating near the bobbin case opening; The lower thread is stored in the lower thread supply means from the front end thereof before being entangled with the bobbin shaft, and the stored lower thread is released at the time of entanglement and is drawn out from the front end by air. Deriving means, bobbin driving means for rotating the bobbin to entangle the bobbin thread supplied to the inside of the bobbin case with the bobbin axis, and entanglement detecting means for detecting entanglement of the bobbin thread with the bobbin axis,
And immediately after detecting the entanglement of the thread on the bobbin shaft, the air of the lower thread deriving means is stopped.

A bobbin winding device according to a fifth aspect of the present invention comprises a bobbin case having an opening formed in a peripheral edge thereof, and a bobbin shaft housed in the bobbin case and rotatably supported to wind the yarn. A bobbin and a thread from the lower thread supply source from the tip, guide the thread into the bobbin case opening when the lower thread is entangled, and retreat to a position separated from the bobbin case opening when winding the lower thread. Bobbin thread supply means which can be brought into contact with and separated from the vicinity of the bobbin case opening, bobbin driving means for rotating the bobbin so that the bobbin thread supplied to the inside of the bobbin case is entangled with the bobbin shaft, Entanglement detecting means for detecting entanglement, wherein the entanglement is detected again after the lower thread supply means is retracted.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. FIG.
FIG. 1 is a side view for explaining an outline of a lower thread automatic supply device 100 provided with a lower thread winding device of the embodiment.

An automatic lower thread feeding device 100 according to this embodiment
As shown in FIG. 1, is attached to the lower portion of the sewing machine bed 10 provided on the sewing machine table T. Although not shown in detail in FIG. The apparatus includes a yarn winding device (to be described in detail later), a residual yarn removing device 1 that performs a residual yarn removing process at a residual yarn removing position B, and a bobbin replacing device 3. The bobbin exchanging device 3 includes a rotating arm 5 that is rotatable about a fixed shaft 4 and is linearly movable along the axial direction of the fixed shaft 4, and a bobbin case 6 is attached to the rotating arm 5. The bobbin case gripping means 2 which can be gripped or opened is provided. The bobbin case gripping means 2 is provided with a lower thread winding position C provided on one circular arc centered on the fixed shaft 4 and a lower thread winding position C. Yarn removal device 1
Thread removal position B, bobbin case attachment / detachment position (hook position)
K and a dummy position D.

That is, when it is time to replace the bobbin (insufficient remaining amount of bobbin thread, etc.), the bobbin replacing device 3 advances the bobbin case gripping means 2 to the bobbin case attaching / detaching position K, thereby removing the bobbin case 6 in the shuttle. The bobbin case 6 is retracted and then retracted, and the removed bobbin case 6 is positioned at the remaining yarn removing position.
Transfer to B and mount. Further, the pivot arm 5 pivots to the dummy position D, takes out the bobbin case 6 containing the bobbin 13 on which the bobbin thread has been wound at the dummy position D by the bobbin case gripping means 2, and faces the bobbin case attaching / detaching position K. Then, the bobbin case 6 containing the bobbin 13 on which the bobbin thread has been wound is attached to the bobbin case attaching / detaching position K by moving the bobbin case gripping means 2 forward. By further retreating and rotating by a predetermined angle, the bobbin case gripping means 2
The bobbin case 6 accommodating the bobbin for which the residual yarn removing process has been completed is taken out, and is conveyed and attached to the lower yarn winding position C. Bobbin winding position C
The bobbin case 6 conveyed to the bobbin case 13 is subjected to a bobbin winding process on the inner bobbin 13, a thread hooking process on the bobbin case 6, and a thread trimming process. Until the bobbin is replaced. As described above, the bobbin changing device 3 can rotate the bobbin case gripping means 2 to each predetermined position.

As the bobbin changing device 3, for example, Japanese Unexamined Patent Application Publication No. 11-253680 or 9-56948
The bobbin case gripping means 2 (bobbin case 6) can be used as required, for example, by removing the bobbin case attaching / detaching position A, the bobbin winding position C of the bobbin winding device, Any device can be used as long as it can be moved to any position, such as the remaining yarn removing position B of the remaining yarn removing device 1 and the dummy position D. Examples of the bobbin case gripping means 2 include a pair of electromagnet suction heads described in, for example, Japanese Patent Application Laid-Open No. 5-192476.
An appropriate device such as a device using a lever claw described in Japanese Patent No. 304369 can be employed. In other words, a device in which the bobbin case 6 can be attached to and detached from an opposing member (for example, a hook K) as necessary. Good.

When the bobbin case 6 removed from the shuttle (bobbin case attaching / detaching position K) and the bobbin case 6 is removed by the bobbin case gripping means 2 and moves to the residual yarn removing position B, the residual yarn is removed. The remaining yarn of the bobbin 13 is removed by the device 1. The remaining yarn removing device 1 is configured such that the bobbin 13 is rotated by the yarn pulling-out operation of the pulling-out means for pulling out the yarn wound around the bobbin 13 and drawn out from the bobbin case 6, and the yarn wound around the bobbin 13 is pulled out. Any one may be used as long as it is suitable.

Further, when the bobbin case 6 accommodating the bobbin from which the residual yarn has been removed is gripped by the bobbin case gripping means 2 and moved to the lower thread winding position C, the lower thread is wound on the bobbin by the lower thread winding device. Is done. This bobbin winding device is
As shown in simplified form in FIG. 1, the bobbin rotating means E, the lower thread supply means G, the thread supply detecting device F, the lower thread storage and
Conduit 7 for guiding the lower thread to the lead-out means H and the yarn supply means G
0 (described in FIG. 2). Of these, the bobbin rotation means E and the lower thread supply means G constitute a lower thread winding means for winding the lower thread around the bobbin 13.

FIG. 2 is a configuration diagram showing the configuration of the lower thread winding device. FIG. 2 is a top view. As shown in FIG. 2, the bobbin rotating means E of the bobbin winding device drives the bobbin motor M1 to apply this rotational driving force via a motor shaft pulley 7, a timing belt 8, and a take-up pulley 9. To the take-up clutch plate 12, and at this time, with respect to the existing hole of the bobbin 13 housed inside the bobbin case 6 held by the bobbin case holding means 2 located at the lower thread winding position C. The clutch pins formed on the winding clutch plate 12 are connected by rotating the winding clutch plate 12 by transmitting the driving force, and then the bobbin 13 is rotated.

The lower thread supply means G of the lower thread winding device generally includes a thread suction device 15 and a thread supply nozzle 16 in which a lower thread L from a lower thread supply source (thread spool) (not shown) is disposed, and a solenoid valve 17. Opening operation of the lower thread supply path (conduit 7) in the thread suction device 15
And a lower thread supply rotation motor M2 for moving the nozzle tip 16a by rotating the thread suction device 15 about a shaft 18 as a fulcrum.
And A conduit 70 for guiding the lower thread L is connected to the thread suction device 15.

According to the lower thread supply means G, the lower thread L having a length necessary for entanglement is once supplied from the nozzle tip 16a.
After being housed in the yarn supply nozzle tip 16a, the lower thread supply rotation motor M2 drives the nozzle tip 16a to a working position near the opening of the bobbin case 6 and supplies air at this time. The bobbin thread L is led out by blowing the air from the tip 16a, and the led-out thread is guided to the inside from the opening of the bobbin case 6. At this time, the bobbin 13 rotated by the driving of the above-described bobbin motor M1 is moved. The lower thread L guided inside the bobbin case 6 is entangled with the bobbin shaft 13c by blowing the air into the bobbin case 6 accommodated therein to form a vortex in the bobbin case 6, and thereafter, the so-called so-called bobbin shaft 13c is formed. The lower thread supply rotation motor M2 is driven to move the nozzle tip 16a to a winding operation position separated from the operation position so that uniform winding can be performed. , It is adapted to perform the bobbin thread times.

FIGS. 3 and 4 show a detailed configuration diagram of the yarn supply detecting device F of the lower yarn winding device. FIG. 3 is a front view of the yarn supply detection device F, and FIG. 4 is a side view of the yarn supply detection device F. The yarn supply detecting device F of the bobbin winding device detects the entanglement of the bobbin with the bobbin shaft and the amount of the bobbin wound on the bobbin. The yarn supply detecting device F will be described below. In FIGS. 3 and 4, reference numeral 46 denotes a U-shaped base, and a roller shaft 47 is rotatably stretched between both side plates of the base 46. This roller shaft 4
One end of 7 protrudes outward from one side plate, and a roller 45 on which a bobbin thread L from a bobbin thread as a bobbin thread supply source is wound (is wound once) is fixed to the end section. I have.

A sensor slit 48 is fixed to a portion of the roller shaft 45 between both side plates. The sensor slit 48 has a disk shape, and a groove is provided in a part of the outer periphery. A photo sensor 49 is provided at a position facing the sensor slit 48 so that the groove of the sensor slit 48 can be detected. That is, the photo sensor 49
Thus, the rotation of the roller 45 can be detected.

The photo sensor 49 detects that the bobbin thread L is entangled with the bobbin shaft and detects the bobbin shaft 13c.
The effective bobbin winding amount detecting means 61 for detecting the effective bobbin winding amount wound around is connected. The effective lower thread winding amount detecting means 61 is connected to a determining means 61B. This determination means 61B is provided with a set lower thread winding amount from an externally connected lower thread winding amount setting means 61A and a lower thread actually wound on the bobbin from an effective lower thread winding amount detecting means 61. The amount is compared with the amount, and when both lower yarn amounts match, a function of transmitting a drive stop signal to the driver 310a of the thread winding motor M1 is provided. The effective lower bobbin winding amount detecting means 61 and the judging means 61B control the lower bobbin winding apparatus. The lower bobbin winding apparatus control section 401 has a control system (not shown) of the lower bobbin automatic supply apparatus 100 which is constituted by a CPU or the like. ).

FIGS. 5 and 6 show a lower thread storage device for the lower thread winding device.
FIG. 3 shows a detailed configuration diagram of a derivation mechanism. FIG. 5 is a top view, and FIG.
6 is a side view. As shown in FIG. 2, the lower thread storage / lead-out mechanism H of the lower thread winding device is provided upstream of the lower thread supply path from the inlet of the conduit 70, and is provided between the yarn supply detection device F and the yarn suction device 15. The lower thread L is temporarily drawn into and stored in the lower thread L, or the stored lower thread L is released and led out. By storing and leading out the lower thread L, the lower thread drawn out from the nozzle tip 16a of the thread suction device 15 is drawn into and stored in the nozzle tip, and the drawn and stored lower thread L is communicated with air from the nozzle tip 16a. Can be derived by the cooperation of.

As shown in FIGS. 5 and 6, the bobbin thread storage / lead-out mechanism H rotates the base 50, the thread pulling motor 42, the motor gear 42c fixed to the motor shaft 42a, and the base 50 via the rotary shaft 53. Gear 5 fixed in a possible state
4. The wiper 52 is fixed to the gear 54. The end of the wiper 52 is provided with a threading hole 52b through which the bobbin thread L is passed, and when the wiper 52 is rotated clockwise (CW direction in FIG. 5), the threading hole 5b is rotated.
The lower thread L passed through 2b is pulled out from the suction port of the conduit 70 and is temporarily stored inside the thread supply nozzle 16, while the counterclockwise direction of the wiper 52 (CCW direction in FIG. 5).
The intermittent rotation gradually releases the temporarily stored lower thread L, and at the same time, supplies air from the air source into the suction device 15 to be sucked into the conduit 70 suction port. The air is drawn out from the nozzle tip 16a of the yarn supply nozzle 16 by air. In addition, the lower thread automatic feeding device 100 includes, for example,
A thread hooking device and a thread cutting device as described in, for example, Japanese Patent No. 5577 are additionally provided. The thread hooking device is located at the lower thread winding position C.
And the lower thread L wound around the bobbin 13 and led out from the opening of the bobbin case 6 by the rotation of the moving knife thread. The bobbin case 6 is configured to thread the thread so as to be led out from a lower thread lead-out hole under the lower thread tension bobbin. Is separated by the turning operation of the moving knife thread separation and cut at a fixed knife. In both devices, an appropriate method may be used as long as a similar effect is obtained.

Next, the preparation of the lower thread L of the lower thread winding device 100 configured as described above will be described. In the above-described bobbin winding device, the bobbin thread L is first extended from a bobbin (not shown) serving as a bobbin supply source wound in units of several thousand meters, for example, provided above the bobbin. After passing through a thread guide (not shown), the thread tension 44 provided on the sewing machine table T and in front of the thread supply detecting device F is provided.
After the lower thread L is rotated once by the roller 45 of the thread supply detecting device F, the thread is hooked on the rear thread tensioner 44. Next, the lower thread L derived from the thread supply detecting device F is stored in the lower thread storage /
After passing through the threading hole 52b of the wiper 52 of the lead-out mechanism H, the lower thread L is drawn out from the lower thread storage / lead-out mechanism H again. Here, for convenience, the yarn is wound in units of thousands of meters, but the amount of yarn held is not limited as long as the effect as a yarn supply source is achieved.

Thread supply detecting device F and bobbin thread storage / discharge mechanism H
Then, the operation panel, a switch (not shown), and the like are operated to open the electromagnetic valve 17 of the yarn supplying means G. By this opening operation, the air from the air source is supplied to the lower yarn supply path in the yarn suction device 15, and the air supply also causes the air to flow into the conduit 70. Then, the lower thread L can be sucked and guided in the conduit 70.

In this state, the lower thread L led out from the lower thread storage / lead-out mechanism H is sucked into the conduit 70 exposed on the sewing machine table T. Then, the lower thread L passes through the inside of the conduit 70, is guided to the outlet of the conduit 70, passes through the yarn suction device 15 of the yarn supply means G, and passes through the nozzle tip 16 of the yarn supply nozzle 16.
is discharged from a.

The nozzle tip 16 of the yarn supply nozzle 16
When the lower thread L is discharged from the nozzle a, the operation panel and a switch (not shown) are operated to close the solenoid valve 17 of the thread supply means G, and then the length of the lower thread L coming out of the nozzle tip 16a. Is adjusted to complete preparation of the lower thread.

Next, the bobbin winding operation of the bobbin winding apparatus according to the present embodiment will be described with reference to the flowchart shown in FIG. This bobbin winding operation is started when the bobbin case 6 accommodating the bobbin 13 that has undergone the residual yarn removing process or that requires a new bobbin winding is transported to the bobbin winding position C.

At this point in time, the lower thread L required for the entanglement has already been drawn out of the tip 16a of the thread supply nozzle, the thread pulling motor 42 is released from being pulled in and the wiper 52
Is located closest to the suction hole of the conduit 70.

Here, as described above, the bobbin case gripping means 2 for gripping the predetermined bobbin case 6 is moved to the lower thread winding position C.
Then, the bobbin case gripping means 2 is advanced to engage with the clutch plate 12, and in step 1, the bobbin 13 is rotated by driving the thread winding motor M1 to connect the clutch pin to the existing hole of the bobbin 13.

Next, in step 2, the thread picking motor 42 is operated in the direction of arrow CCW in FIG. 5 to rotate the wiper 52 by 60 ° in the direction of arrow CW in FIG. Then, since the position of the threading hole 52b of the wiper 52 moves to a position farther from the suction hole of the conduit 70, the conduit 7
At the same time as the lower thread L in 0 is drawn into the lower thread / introducing means H side, the lower thread L coming out of the nozzle tip 16a is drawn into the conduit 70 side and stored.

At this time, it is preferable that the lower thread L hand-wound by the wiper 52 only comes from the downstream side of the lower thread supply path from the wiper 52. The degree of pull-in of the lower thread L derived from the nozzle tip 16a is preferably such that the lower thread end is pulled from the nozzle tip 16a to about half the length of the thread supply nozzle 16.

Next, in step 3, the yarn supply nozzle tip 16a is moved to the initial work position of the lower yarn winding process near the opening of the bobbin case 6.

Then, in step 4, the yarn guide air solenoid valve 17 is turned on to release air from the air source into the yarn suction device 15.
The yarn is supplied to the yarn supply nozzle 16 through the nozzle, and the air is blown out from the yarn supply nozzle tip 16a.

Thereafter, in step 5, the timer is once reset here, restarted, and the routine proceeds to step 6. Immediately thereafter, in step 6, the thread take-up motor 4
2 is operated in the direction of the arrow CW in FIG. 5, and the wiper 52 is rotated in the direction of the arrow CCW in FIG.
Stop. Here, the amount of movement of the lower thread is 2.5 mm, which is released from the yarn supply nozzle 16 in cooperation with the yarn guide air. . However, in this embodiment, it is assumed that the lower thread L corresponding to 100 mm in total is pulled in when the wiper 52 stores the thread.

Next, at step 7, the wiper 52
It is determined whether or not 0.1 seconds have elapsed since the rotation of the motor stopped, and if it has not elapsed, the flow returns to the upstream of the chart to continue waiting. If it is determined that 0.1 seconds have elapsed, the process proceeds to step S8.

Next, at step 8, if the rotation speed of the roller 45 of the yarn supply detecting device F has not reached the winding confirmation value, it is determined that the lower thread L is not yet entangled with the bobbin shaft 13c, The process proceeds to step 14 described later. If it is determined that the number of rotations of the roller 45 has reached the winding confirmation value, the process proceeds to step 9. Here, the yarn supply detecting device F wraps the yarn around the bobbin shaft 13c and determines that the rotation of the roller 45 due to the lower yarn wound by the rotation of the bobbin has reached a certain value or more, thereby confirming the winding. .

When the winding is determined in step 8, the yarn guide air solenoid valve 17 is turned off in step 9, and then the wiper 52 is continuously rotated in the direction of arrow CCW in FIG. The threading hole 52b of 52 moves to the initial position closest to the introduction hole of the conduit 70 (step 10).

Then, in step 11, the yarn supply nozzle 16 is retracted to be separated from the bobbin case opening, then the above-described lower yarn winding processing is performed (step 12), and the above-described yarn hooking / thread cutting processing is performed (step 12). 1
3), a series of lower thread winding processing ends.

On the other hand, if it is determined in step 8 that the number of revolutions of the roller 45 has not reached the winding confirmation value, the flow advances to step 14 to determine whether the wiper 52 has made a small movement 40 times in the direction of the arrow CCW in FIG. A determination is made (operations K1 to K40 in FIG. 5), and if the number has not reached 40, the process returns to step 5 and the operations in steps 5 to 8 are repeated. Also,
If it is the 40th time, the wiper 52 is set at 60 ° (1.5 ° × 4
(0 times) It turns in the CCW direction in FIG. 5, it is determined that the wiper 52 has returned to the initial position, and the yarn guide air solenoid valve 17 is turned off (step 15). Next, the yarn supply nozzle 16 is retracted (step 16), and it is determined again whether or not the rotation speed of the roller 45 has reached the winding confirmation value (step 1).
7). Here, if the winding confirmation value has been reached, step 1
Then, the process proceeds to step 2 and the processes after step 12 are performed. If the winding confirmation value has not been reached, the thread winding motor M1 is turned off.
FF is performed (step 18), and then it is determined whether or not the wiper 52 has repeated the predetermined number of retries (step 19). If the predetermined number of retries has not been performed, the process returns to step 1 to perform a series of lower thread winding processing. repeat. If the bobbin winding process has been repeated a predetermined number of times, an error is displayed as an error (step 20), and the series of processes ends.

In this embodiment, the bobbin axis is 50 mm /
It rotates continuously at a speed of 2 seconds, and the lower thread L
At a speed of 0 mm / sec, the wiper 52 is intermittently drawn out of the yarn supply nozzle tip 16a by the intermittent movement of the wiper 52 in cooperation with the yarn guide air. By the way, if the supply speed of the yarn is lower than the rotation speed of the bobbin shaft surface, it is convenient for the yarn to be entangled, and it is more preferable that the speed ratio is 1/2 or less.

In the case where the yarn is intermittently supplied, the stop time is 9 when the ratio of the operation of the yarn to the stop time is 1 as the operation time. That is, 1: 9
By making the stop time longer, it is advantageous for entanglement of the yarn. The supply speed of the yarn based on the operation time of the yarn is about 200 mm / sec. However, since the stop time is nine times the operation time, the yarn supply speed is substantially 2% as a whole.
0 mm / sec is the yarn supply speed.

It should be noted that the present invention is not limited to the lower thread winding device of this embodiment, but can be changed as appropriate. In addition, the detailed structure, processing details, and the like of the lower thread automatic supply device 100 that are specifically shown can be appropriately changed without departing from the spirit of the invention.

[0048]

As described above, according to the first aspect of the present invention, since the lower thread is intermittently fed, the lower thread repeatedly moves and stops in the forward direction with respect to the rotation direction of the bobbin shaft.
Therefore, the stopping operation increases the catch of the bobbin thread on the bobbin shaft, and the thread can be entangled in a shorter time.

According to the present invention described in claim 2,
The effect of the invention described in claim 1 can be further ensured.

According to the third aspect of the present invention, when the bobbin thread is entangled with the bobbin shaft, the bobbin thread is supplied at a speed lower than the rotation speed of the bobbin shaft, so that the bobbin thread is fed to the bobbin shaft. Are reliably and favorably entangled.

According to the fourth aspect of the present invention, the yarn guiding air is turned off immediately after the entanglement of the lower yarn has been confirmed, so that the yarn entanglement after the yarn entanglement is small, and the yarn entanglement in a good state can be achieved. It is possible.

According to the fifth aspect of the present invention, whether or not the number of rotations of the roller has reached the winding confirmation value is confirmed again after the leading end of the yarn supplying means is separated from the position near the bobbin case. As the certainty of thread entanglement improves,
If the thread is retried without knowing that the thread has been entangled due to the retreat of the thread supply nozzle, it is possible to prevent the thread from tangling around the thread winding portion.

[Brief description of the drawings]

FIG. 1 is a front view of an automatic lower thread supply device including a lower thread winding device according to an embodiment of the present invention.

FIG. 2 is a top view of a configuration related to a lower thread winding device in the lower thread automatic supply device.

FIG. 3 is a front view illustrating a configuration of a yarn supply detection device of the lower yarn winding device.

FIG. 4 is a side view illustrating a configuration of a yarn supply detection device of the lower yarn winding device.

FIG. 5 is a top view showing a configuration and an operation of a lower thread storing / leading-out means of the lower thread winding device.

FIG. 6 is a side view showing a configuration of a lower thread storage / lead-out means of the lower thread winding device.

FIG. 7 is a flowchart illustrating a control procedure for performing a lower thread winding process of the lower thread automatic supply device.

[Explanation of symbols]

1 Residual thread removing device 2 Bobbin case gripping means
3 Bobbin changing device 4 Fixed shaft 5 Rotating arm
6 Bobbin case 7 Motor shaft pulley 8 Timing belt
9 Take-up pulley 10 Sewing bed 12 Clutch plate
13 Bobbin 13c Bobbin shaft 15 Suction unit
16 Thread supply nozzle 16a Thread supply nozzle tip 17 Solenoid valve
18 axis 42 Pincushion motor 42a Motor shaft
42c Motor gear 44 Thread tension 45 Roller
46 Frame 47 Roller shaft 48 Sensor slit
49 Photo sensor 50 Base 52 Wiper
52b Wiper threading hole 53 Rotary shaft 54 Gear 61
Effective bobbin winding amount detecting means 61A Lower bobbin winding amount setting means 61B Judgment means
70 Conduit 100 Automatic bobbin thread supply device 310a M2 driver 40
1 Bobbin winding device control means M1 Bobbin motor M2 Bobbin supply rotation motor B Residual thread removal position C Bobbin winding position
D Dummy position E Bobbin rotating means F Thread supply detecting device
G Bobbin thread supply means H Bobbin thread storage / extraction means K Bobbin case attachment / detachment position
L Lower thread T Sewing machine table

Claims (5)

[Claims] A bobbin case having an opening formed in a peripheral edge thereof;
A bobbin that is housed in the bobbin case and is rotatably supported and has a bobbin shaft capable of winding a yarn; bobbin driving means for rotating the bobbin in the bobbin case; And a lower thread supply means which guides the thread into the bobbin case opening and which can be brought into contact with and separated from the vicinity of the bobbin case opening, and a lower thread derived from the tip of the lower thread supply means is entangled with the bobbin shaft. A lower thread storing / leading-out means for storing the stored lower thread inside the lower thread supplying means from the front end thereof and releasing the stored lower thread at the time of entanglement and leading it out of the front end; and Control means for intermittently opening and drawing out to the inside of the bobbin case by the drawing-out means and controlling the supply so as to be fed out, and intermittently drawing out the lower thread from the tip of the lower thread supply means to the inside of the bobbin case.・ To guide Bobbin thread winding device which rotates the bobbin and performing with entanglement of the yarn to the bobbin by the bobbin drive means. 2. A bobbin thread winding device according to claim 1, wherein said bobbin thread storing / leading-out means repeats moving / stopping to intermittently open / lead-out the bobbin thread for a moving time of intermittent operation. A bobbin winding device characterized in that the time is the same or longer. 3. The bobbin winding device according to claim 1, wherein an intermittent supply speed of the bobbin thread, which is intermittently released and led out by the bobbin storage / leading-out means, into the bobbin case is controlled by a bobbin driving means. A lower thread winding device characterized in that the rotation speed is lower than the rotation speed of the surface. 4. A bobbin case having an opening formed on a periphery thereof.
A bobbin housed in the bobbin case and rotatably supported and having a bobbin shaft capable of winding a yarn, and a lower thread supply source inwardly into and from the bobbin case opening and closing end near the bobbin case opening A lower thread supply means for deriving and guiding the thread from the lower thread supply means, and a lower thread derived from the tip of the lower thread supply means being housed inside the lower thread supply means from the tip before being entangled with the bobbin shaft, Lower thread storage / lead-out means for releasing the lower thread when entangled and leading it out of the tip by air, and bobbin driving means for rotating the bobbin to entangle the lower thread supplied inside the bobbin case with the bobbin shaft. , Entanglement detecting means for detecting entanglement of the lower thread with the bobbin shaft,
Wherein the air of the lower thread deriving means is stopped immediately after detecting the entanglement of the thread with the bobbin shaft. 5. A bobbin case having an opening formed in a periphery thereof.
A bobbin having a bobbin shaft that is housed and rotatably supported in the bobbin case and capable of winding a yarn, and a yarn from a lower yarn supply source are led out from the tip, and are inserted into the bobbin case opening when the lower yarn is entangled. A lower thread supply means that guides the yarn toward the lower side, and is capable of approaching / separating near the bobbin case opening that retreats to a position separated from the bobbin case opening when winding the lower thread;
A bobbin driving means for rotating the bobbin to entangle the bobbin thread supplied to the inside of the bobbin case with the bobbin axis; and an entanglement detecting means for detecting entanglement of the lower thread with the bobbin axis; A lower thread winding device for detecting entanglement again after retreating the supply means.