JPH0622379B2 - Stator coil lacing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lacing device for knitting a stator coil end of a rotary electric machine such as a small induction motor by single yarn chain knitting, and particularly to a knitting device in such a lacing device. The present invention relates to a processing mechanism for a sewing start end of a thread.

[Background of the Invention]

There are several methods used to process the stator coil end in small induction motors, and one of them is the lacing process that binds the coil end with sewing thread, which is used in refrigerators and refrigerators. Widely used in motors, etc.

By the way, in such a lacing process, as a matter of course, there is a problem of the terminal process of the lacing thread (a sewing thread). Various processing methods are used for this terminal treatment depending on the material of the lacing yarn to be used. As the lacing yarn, Tetron (registered trademark) is used.
Since synthetic resin yarns known as, for example, are generally used, the terminal treatment in the case of using such synthetic resin yarns is mainly a problem, and it has been conventionally desired to improve the efficiency.

One of the methods that has been conventionally adopted as such a lacing thread end treatment is a method of manually tying the lacing thread at the sewing start and the thread at the sewing end. That is, as shown in FIG. 1 (a), the end portion of the coil 2 wound around the stator core 1 is knitted with the racing yarn 2,
The sewing start portion 3a and the sewing end portion 3b are tied with a knot or the like, and thereafter, as shown in FIG. 1 (b), the heater 4 which is red-heated is used to melt and cut the portion of the racing thread 3 remaining from the knot. The terminal processing is completed.

According to this method, fraying of the racing yarn can be prevented by fusing, and unraveling of the knot can be prevented by solidification of the yarn accompanying fusing, but the work of tying the yarn is extremely difficult to mechanize. However, this method has a drawback that it requires only manual work, and thus this method causes a great deal of fatigue to the worker and also causes poor workability.

On the other hand, a method that does not depend on a knot is also known as another racing terminal process.

In this method, at the beginning and end of the sewing of the racing, only the knitting operation is performed a predetermined number of times until the stator index (intermittent rotation) is stopped, and the racing yarn is wound on the same position of the coil end. (This is called multiple stitching), and the sewing start end and sewing end end of the racing thread are held by the multiple stitched portion so that they cannot be untied. FIG. 2 shows an example of a stator coil which is end-treated by this method.

In FIG. 2, reference numeral 3A indicates the above-mentioned multi-sewn portion, and reference numeral 5 indicates a center guide (described later). Note that this example shows the case of lacing by single yarn chain knitting.

According to this multiple stitching, the sewing thread start terminal 3a of the racing thread is
, The next thread is tied on the first laced thread, and the next thread is tied on it, so that it cannot be unraveled easily, while the sewing end terminal 3b is as shown in FIG. In addition, the single-thread chain-knitted thread is represented by 3c, and as a result, the terminal 3b itself forms a loop of threads that it fastens, and it is easy to squeeze the terminal 6b. Can be unsolvable.

Therefore, according to this multiple stitching, after manually squeezing each terminal 3a, 3b, it is only necessary to cut it by a red-heated heater or the like, which is a work as compared with the method of making a knot shown in FIG. The fatigue of the worker is reduced and the workability can be improved.

By the way, in such stator coil lacing, the sewing start end 3a of the lacing thread 3 is supplied from a nozzle (not shown) of the center guide 5 of FIG. Racing begins while held by the person's hand or other suitable means. Therefore, this end 3a is always on the inner diameter side of the stator coil 2, and the stator core 1
It rises from the part near the end face.

Therefore, even if the state shown at 3a in FIG. 3 is initially obtained, the state shown at 3a 'in FIG.
It becomes necessary to disconnect in this state.

For this cutting, a red-heated heater is used for the above-mentioned reason, but the inner diameter of the coil must never be extended because the cooling fins of the rotor rotate after the motor is assembled as a motor. Therefore, care must be taken when cutting with the heater. Further, since the sewing end thread end 3b is only tightened by its own tension, there is a possibility that it may be loosened by cutting away from the portion B of FIG. 3 when cutting with the heater. It is necessary to cut near the B part as much as possible. Moreover, it is desirable to melt the yarn ends a little to make a ball to prevent the ball from coming off when it is cut, and it is a manual work because it is difficult to mechanize the work to make this ball by the current working method. Further, the shape of the coil 2 is slightly different depending on the situation when the coil 2 is inserted into the core 1. Since the shape of the coil 2 is not always kept constant, the distance for approaching the heater is not fixed. Has become.

Therefore, in the method by multiple stitches shown in FIG. 2,
Both the thread treatment at the beginning of sewing and the thread treatment at the end of sewing have difficulty in thread processing with a heater, and if it gets worse, other threads may be cut, which has been a major obstacle to mechanization.

Further, when the thread was cut, harmful smoke was emitted because the heater cuts the polyester synthetic resin thread. Since it is advantageous in terms of time to perform the thread processing without changing the state of the core 1 at the start and the end of the sewing, the thread end processing on the outer diameter side can be performed with a heater in a relatively easy state. On the inner diameter side, it becomes difficult to see unless the face is brought close to the coil 2. Therefore, this method has a drawback in that harmful smoke can be easily rinsed correspondingly.

As yet another method, as shown in FIG. 4, the lacing device indexes the core 1 in a state where the sewing start thread end 3a is sewn multiple times and the thread cannot be unraveled easily. While the single thread chain knitting is started, at this time, the sewing start thread end 3 is turned against the rotation direction.
There is a method of pulling and sewing a ". The explanation is omitted because the end of sewing is the same as the method described above. This method automates half of the above method and leaves the other half as manual work. Therefore, the disadvantage of the end treatment at the end of sewing is the same as described above, and it remains as it is, and mechanization and automation are difficult.

On the other hand, according to this method, the sewing of the sewing start can be automated and is meaningful.
As shown in the figure, it is quite conceivable that the end of the thread 3a "at the beginning of sewing spills from between the single-thread chain-knitted thread and the thread 3 '. Even if there is not much pilfered portion, it is fully conceivable to pierce the yarn 3'laced by the terminal 3a "during inspection work or transportation.

In the racing, it is natural to perform the coils 2 at the upper and lower portions, respectively. However, when the terminal 3a ″ is in the free state as described above, when the terminal 3a ″ is incorporated as a motor, air or a medium is axially formed in the core 1. At least one of the free ends 3a ″ when flowing flows toward the core 1 and the rotor (not shown). This can be a source of noise and the laced thread 3 ″ can be cut by the rotor and the cut ends can be rolled up.

Further, the laced stator is then transferred to a fixing process such as impregnation with varnish, but it is not so if the lacing yarn 3 is kept completely as it is until the time of fixing. is there. That is,
Even if the yarn end 3a ″ is fixed, the yarn end 3a ″ is rarely fixed along the coil 2, and usually at least one of them is fixed in a state of floating from the coil 2. Therefore, the motor As a result, the free terminal 3a ″ moves from its root during operation after assembling as described above, and the fixed layer in this portion is destroyed by electromagnetic vibration. This is also the case when the terminal 3a ″ is sewn along the outer peripheral direction of the coil 2 because the terminal 3a is sewn.
Since the yarns 3'and 3 "that tie up the a" intersect the coil 2 at a substantially right angle and therefore have no contact points or lines with the coil 2, the terminal 3a "is violently cooled by the cooling air or the medium. When vibrated, the fixed layer in the vicinity cannot be damped.

Furthermore, in the case of non-sticking, for example, a cooling motor, it is absolutely impossible for the terminal 3a ″ to vibrate violently depending on the medium as described above because it damages the yarn. It is common knowledge that even if it is pulled in the outer peripheral direction by a force of about 500 g, it floats from the coil 2 by 1 to 2 mm. Therefore, the thread end 3a ″ sewn thereunder is under a flowing medium or electromagnetic vibration. However, if the medium is violently vibrated violently, the yarns 3 ′ and 3 ″ will gradually loosen, further promoting electromagnetic vibration of the coil 2 and causing a vicious circle. Will bring about.

As described above, the conventional method has drawbacks that it is difficult to mechanize, has an adverse effect on workers, and has a problem in reliability.

[Object of the Invention]

The object of the present invention is to provide a lacing device which is excellent in workability for terminal treatment of lacing yarn, which can be easily automated and mechanized, and which can give high reliability to a product, excluding the above-mentioned drawbacks of the prior art. There is.

[Outline of Invention]

In order to achieve this object, the present invention swings the end of the sewing start of the racing thread rising from the inner circumferential direction of the stator coil end to the left and right in the advancing and retracting direction of the knitting needle in accordance with the racing operation by the knitting needle. However, it is characterized in that multiple sewing is performed and the rising position of the sewing start end is moved to the upper part or the outer peripheral direction of the stator coil.

Example of Invention

Hereinafter, a stator coil lacing apparatus according to the present invention will be described in detail with reference to the illustrated embodiments.

5 to 9 are diagrams for explaining the processing operation of the racing terminal in the embodiment of the racing apparatus according to the present invention. First, the principle of the present invention will be explained with reference to these figures.

Fig. 5 shows the state at the beginning of racing sewing, in which thread 3
After being pulled out from the nozzle 7, the sewing start end 3a is pulled upward, and then the knitting needle 6 first moves the coil 2
Between the rising and rising of the coil 2 of the core 1 and the core 2 toward the center of the core 1
To the outer circumference. At this time, the sewing start terminal 3a is at least at a position where it does not travel to the inner diameter of the coil 2 and does not intersect with the straight line connecting the knitting needle 6 and the nozzle 7 at a large angle, and the upper end is bound with the thread 3. To do so. While the knitting needle 6 sews the upper part of the coil 2 and descends again to advance and retreat, as shown in FIG. 6, swing the sewing start end 3a so that it is on the opposite side to the position where the terminal 3a was left. ,
The thread 3 is sewn on the terminal 3a again.

When such an operation is repeated several times, even if the terminal 3a is released as shown in FIG. 7, the sewing start portion cannot be easily unraveled. In this state, the terminal 3a is cut off from the coil 2 at a height of several mm as shown in FIG. In this way, it is possible to easily desire automation of the sewing start thread end 3a, but it is desirable to do the following in order to further enhance the effect of the present invention.

First, the sewing start end 3a drawn out in FIG. 5 is made to have the same height as the height of the coil 2 so as to be positioned within 40 mm to the left and right of the knitting needle 6 at a point about 100 mm away from the core 1. When the ends 3a are first brought close to the left and right of the knitting needle 6, they are held so as to be on the index side of the core 1.
That is, if the core 1 is indexed in the direction of the arrow in FIG. 5, the end is held so as to be on the right side of the knitting needle 6 with respect to the center direction of the core 1. Next, as shown in FIG. 6, when the knitting needle 6 completes the process of one cycle and enters the next cycle, the terminal is held at a position symmetrical to the knitting needle as in the case of FIG. 5, that is, on the left side. To do. Then, as shown in FIG. 8, when the third cycle is completed, the terminal 3a is raised and cut so as to be within 5 mm.

It should be noted that the yarn 3 is cut by a heater. At this time, immediately after cutting, the fusing part of the yarn is held down by a holding member made of a material that does not stick easily such as a fluororesin, and the fusing part is cut to other yarns. If you stick them together, you will get better results.

Further, as described above, if the terminal 3a is first held in the index direction, there is an advantage that the thread cutting process can be performed relatively easily without interfering with the operating knitting needle 6. As shown in FIG. 9, the cut portion of the sewing start terminal 3a can be sewn even if the surplus length is slightly long when multiple sewing is performed at the sewing end processing. The terminal 3a is held in the vicinity of the knitting needle 6 in order to sew it so as to surely make a line contact. In this way, when the terminal 3a is melted, the terminal 3a is kept substantially parallel to the already laced thread 3, so that when the terminal 3a is melted and pressed against the thread 3 with a pressing member or the like, the thread is melted by heat. Tend to stick to other threads, making lacing more reliable. Also, at least three times are required for multiple stitches, and it is difficult to ensure that the rising portion of the coil comes out to the outer peripheral portion of the coil 2 by two times.

Next, a racing apparatus according to an embodiment of the present invention, which operates according to the above operation principle, will be described.

In FIG. 10, a knitting needle 6 which is detachable by a chuck 63 is attached to a racing body 61. This knitting needle 6 has many types depending on the model. In this figure, the lower end position of the knitting needle 6 is shown by a solid line and the upper end position is shown by a two-dot chain line. The main body 61 has a center post 8 in a direction perpendicular to the knitting needle 6, in which the core 1 is held at a certain height by a holder (not shown). Inside the center post 8, there is a knitting needle 6 and a holder guide 5 which is raised and lowered and twisted for single-chain chain knitting by a drive unit (not shown), and a nozzle 7 for exchanging the yarn with the knitting needle 6 is provided at an upper tip portion thereof. .

The sewing start thread processing portion is mounted on the plate 45 supported by the column 60. This is a plate that can only be moved vertically
Guide bar 43 connected to guide holder 41 of 40 guides
A drive 44 held by 42 and actuating it
Is installed.

A plate 40 movable only up and down has a column 33, and a plate 28 rotatably held with respect to the column 31 via a radial bearing 31 and a thrust bearing 31 'is provided. The whole weight is received by the receiver 30 fixed to the support column 33 by a method such as a screw (not shown). Further, the plate 40 is provided with a driving unit 34 for giving a rotational movement to the plate 28, and the driving force by this is a boss.
It is transmitted to the plate 28 by the lever 35, the lever 36, and the pin 37. The plate 28 also has a holder 29 that holds the slide bar 25, and a support 27 that supports a drive unit 26 that drives the bar 25. Further, the slide bar 25 has a mounting plate 24, and the bar 25 is only for moving the mounting plate 24 forward and backward. A clamper drive unit 23 is attached to the tip of the mounting plate 24.

As shown in FIG. 11, a clamper holding plate 22 holding a clamper 18 by a plate 21 is attached to the clamper driving unit 23, and when the clamper driving unit 23 is operated, it is connected via connecting rods 20 and 17 connected by pins 19. Then, the clamper 18 is driven, and the clamper 18 is rotated about the pin 16. The pin 16 is held by the clamper holding plate 22.

Returning to FIG. 10, the clamper 18 is normally located at the position 18 (a) indicated by the chain double-dashed line. When the signal indicating that the racing preparation is completed is received, the clamper 18 is first advanced by the drive unit 26 and then lowered by the drive unit 44. At this time, the clamper drive unit 23 is in the retracted state, and the clamper 18
Is open. The position where the clamper 18 descends by the drive unit 44 is preferably between the center post 8 and the nozzle 7. The clamper 18 should be opened so that the sewing start end 3a can always be reliably clamped even when the center guide 5 moves up and down and is twisted, and thus the tip of the nozzle 7 from which the sewing start end 3a is projected is rotated up and down to some extent. It goes without saying that you have to do it. The clamper 18 is then closed to clamp the thread end 3a at the start of sewing, but at this time, if the air nozzle 9 is provided and air is blown from the direction opposite to the opening of the nozzle 7, the thread 3 will move directly from the nozzle 7. Since it is immediately extruded toward the coil 2, the workability of the clamp can be improved.

After the clamper 18 holds the terminal 3a, it rises and retreats to hold the terminal 3a at the position indicated by the chain double-dashed line 18 (a). The position of the slide bar 25 to which the clamper 18 is attached at this time is the position shown by the solid line (and broken line) in FIG. When the knitting needle 6 completes the above-described one cycle process in this state, the support column 33 attached to the vertically movable plate 40 not shown in FIG.
The plate 28 is rotated by the driving unit 34 attached to the plate 40. At this time, one of the boss 35 and the lever 36 is held by a pin 37 'so that they can rotate,
The other 36 is rotatably attached to a pin 37 fixed to a rotatable plate 28. Although a rotary reactor is used as the driving unit 34 for rotating the plate 28, the clamper 18 may be moved by linear driving. Now, when the drive unit 34 that gives rotation to the plate 28 rotates up to 180 degrees, the clamper 18
The slide bar 25 to which is attached is shown by a chain double-dashed line
The position 25 (B) is reached, and the sewing start terminal 3a moves from the position indicated by the solid line to the position 3a (B) which is symmetrical with respect to the knitting needle 6.

Further, when the knitting needle 6 completes the above-mentioned one cycle process in this state, the driving unit 35 for rotating the plate 28 again rotates so as to return to the original position. Slide bar 25
Is again in the position indicated by the solid line, and the knitting needle 6 performs one cycle of process. When this step is completed, the driving portion 53 for cutting the thread at the beginning of sewing, which holds the heater 50 that has heated red by the holding plate 52, operates to melt and cut the thread end 3a at the beginning of sewing. The mounting position of the drive unit 53 may be anywhere as long as the yarn can be cut, but it is desirable that the heater approaches from a position higher than the coil 2 during the cutting operation. The drive unit 53 retracts as soon as the yarn is melted. Then, while the end of the terminal 3a, which has been blown by the heater 50 by mistake, is not solidified yet, the pushing piece 49 made of a material that does not easily stick, such as the fluorine resin shown by the broken line in the figure, is moved forward by the drive section 55. , Press the sewing start end 3a of the fused portion, which is not yet solid, and attach it to the thread 3 being lacing. This push piece 49 immediately retreats. The thread cutting operation can be performed even after the knitting needle 6 finishes the multiple stitching and starts indexing in the direction of the arrow, so that workability is good. Needless to say, the heater 50 can have a shape along the coil 2 in order to make the remaining length of the yarn end 3a in the coil 2 as short as possible. Further, if another fixing process is performed next, there is no problem even if the pushing piece 49 is not pushed.

By the way, in the case of lacing, it is common to give tension to the lacing thread, so the description of this point is omitted. The tension is applied in this way because the yarn is pulled out from the nozzle 7 a little more when the yarn is hooked by the knitting needle 6 and the single yarn chain knitting is performed, so that the yarn 3 is absorbed and the yarn 3 does not sag on the coil 2. This is because
Especially when performing multiple stitches, the thread 3 drawn by the knitting needle 6 may become slack on the coil 2 unless it is pulled back for a long time. This tendency often occurs at the beginning of sewing, and this is in the middle of multiple stitching, which is easier for the thread to slip, so the amount of slack can be reduced compared to the case of multiple stitching. This is because it is conditionally worse than

The large slack 3d as shown in FIG. 13 is absorbed in the nozzle 7 by a tension device (not shown) by the time when the new yarn 3 from the nozzle 7 passes through the ring 3e with the knitting needle 6 hooked at the tip of the needle. If it is not made into a small loop as indicated by 3d (c), there is a possibility that the thread of the loop 3d will be caught again in the process of raising and advancing the knitting needle 6. In this case, as a countermeasure, before the knitting needle 6 moves up and forward, the sewing start end 3a is retracted by 1 and moved to the position indicated by 3a (c), whereby the thread is pulled and the ring 3d is indicated by the broken line. It is necessary to make it 3d. To do so, in this embodiment, as shown in FIG. 14, when the clamper 18 moves forward together when going to clamp the sewing start terminal 3a, and when it comes back after clamping the terminal 3a,
A drive unit 47 having a force stronger than that of the slide bar drive unit 26 using the lateral protrusion 48 of the mounting plate 24 as a stopper is provided. As a result, in conjunction with the knitting needle 6 performing a predetermined operation, the drive unit 47 that was pushing the protrusion 48 of the mounting plate 24 is retracted, the clamper 18 is moved from the solid line position to the position indicated by the broken line, and the wheel 3d is moved. Is small. By doing so, it is possible to prevent disconnection and excessive slack of the yarn. Note that this operation can be linked with the tension device. For example, if the tension device is operated before and after moving the driving unit 47 backward, a defect due to the looseness of the thread at the beginning of sewing can be solved. .

Now, although one embodiment of the present invention has been described above with respect to processing of thread at the beginning of sewing, the above-mentioned drawbacks remain and it cannot be said to be practical even if processing of thread at the end of sewing is not automated. Therefore, an embodiment of the present invention that enables automation of the end thread sewing end will be described below.

FIG. 15 shows an overall block diagram of the apparatus for grasping the general condition, and FIG. 16 shows a plan view. The end-of-sewn thread end processing mechanism is normally on standby at the top to avoid interference with the start-of-sewing thread end processing mechanism.

When the lacing by the lacing body 61 is completed, the holding plate 70 accommodating the yarn processing section is lowered by the drive source 103 while being regulated by the guide bar 102 guided by the guide 104 fixed to the holding plate 70 by the fixing tool 101. After the yarn is processed, it is raised by the drive source 103. The driving source 103 is attached to the holding plate 106. The holding plate 106 is attached by means of another holding plate 105 to the plate 45 supporting the sewing start thread end treating section.

Two guide bars 71 are held on the holding plate 70, and the drive source is attached to the holding plate 70 by the fixture 72.
It has a slide block 75 that moves left and right through a connector 74 by 73. 17 and the bottom view (right half) of FIG. 18 of the slide block 75 are used together to explain the slide block 75.

Since the thread retainer 78 is held by the pin 83 in the guide box 76 that guides the thread retainer from all sides and one of them is constantly pressed by the spring 80, when the force from the thread retainer drive source 79 does not act on the protrusion 78a, It is tilted around the pin 83 so that it does not interfere with the yarn 3 when the holding plate 70 is lowered by the drive unit 103. And the holding plate 70
When the thread has stopped descending and has reached a fixed position, the thread-supporting drive portion 79 pushes down the thread-supporting protrusion 78a, and the pin 82 stops and positions the thread-supporting projection 78a. At this time, the thread 3 enters its rim so that it can be scooped up by the thread support 78. The pins 82 and 83 are kept by the plate 77 so as not to jump out and have a step so as not to enter too much.

The thread retainer 84 guided by one surface of the guide box 76 of the thread retainer 78 and held by the guide 92 on the other side moves up and down by the drive source 85. The thread retainer 84 has a tongue-shaped pressing portion 84a on the lower side. The cutter holder 86, which is located between the thread retainer 84 and the thread retainer 78 and is partially guided by the thread retainer guide box 76, has a cutter 87 at the tip and a guide bar 88 at the top. The guide bar 88 is guided in the slide block 75. The cutter holder 86 is pushed downward by the drive source 89, and at this time, the guide bar 88
The guide box 76 is also guided because there is a possibility that the guide box 76 may tilt due to the small amount of guide.

The thread pusher 91 clearly shown in FIG. 19 is guided to the side opposite to the thread retainer 83 of the guide 92 and is actuated by the drive source 90 so as to push down the thread between the center post 8 and the nozzle 7.

Now, when the series of operations by the above parts is completed, the slide block 75 is moved by the drive source 73, and the heat treatment part is operated by the yarn 3
Come in front of. As shown in the enlarged view of FIG. 26, the heat treatment section has a drive source 95 attached at a certain angle to a holder 94 that also serves as a guide for the guide bar 97, and a heater is attached to the tip of the guide bar 97. There is a holding plate 96, on which a heater 98
And a sensor that senses the distance between the laced thread 3
99 and is attached.

When the racing is completed, as described above, the drive section 103 causes the sewing end thread end processing section to descend. Then, as described above, the thread support 78 inserts the thread 3 into the edge. This is to protect the knitting needle 6 and to prevent the thread 3 from coming off from the knitting needle 6 during thread processing. Good.

FIG. 19 shows a state in which the thread support 78 holds the thread. When the racing is just finished, the sewing end threads 3 and 3b are separated from the coil 2. By squeezing this, the root 3f of the thread is tightened and sticks to the coil 2. 20th to do so
As shown in the figure, the thread retainer 84 holds down the thread. At this time, the guide must be properly arranged so that the thread presser 84 does not rattle. The effect is exhibited only by repeatedly operating the thread presser 84 several times. Since the slack of the thread 3 generated by the thread retainer cannot be exhausted by the slack remover provided in the tension device, a slack remover must be separately provided between the tension device and the center guide 5. An example of the slack removing tool is shown in FIG.

The yarn discharged from the center guide 5 passes through the roller 111, the yarn clamper 115 and the tension device. Thread clamper 115
Is movable on the guide bar 113 by a driving source 117. The thread clamper 115 has a drive source 114 and starts to operate when the thread presser 84 is operated by a clamper (not shown). The drive source 117 must be set to an operating force that does not break the yarn 3. In this way
84 can always squeeze the thread 3 stretched in a straight line from the coil 2 to the knitting needle 6. The yarn holding is almost completed if it is done 5 times or more.

FIG. 22 shows a state in which the yarn holding process is completed. At this time, the base 3f of the thread is tightly squeezed.

Next, as shown in FIG. 23, the cutter 87 is lowered by the drive source 89 (not shown) to cut the yarn 3. At this time, at almost the same time, the thread pusher 91 is lowered by the drive unit 90, passes through the root 3f of the thread, and the next thread 3a at the start of sewing cut by the cutter 87 is cut.
Is pushed down into the center post 8. Even with this,
The thread end 3b at the end of sewing is not pulled out from the root 3f of the thread that has been hardened. However, if this cutting is performed with a heater, it may not be possible to obtain resistance when the cut end of the thread passes through the root 3f of the hardened thread. Therefore, in this embodiment, the cutter 87 is used as described above. I am using it.

By the way, when the thread 3 is cut by the cutter 87, the slack remover is still pulling the thread. However, when the thread 3 is cut at this time, the slack remover is working, so that the thread 3 It passes through the nozzle 7 and comes off the center guide 5. When the slack remover is released, the thread end 3a cannot be removed when the thread start 3a is to be removed from the root 3f of the thread by thread pressing, and the thread comes out from the nozzle 7. Become. Therefore, in order to solve this problem, in this embodiment, as shown in FIG.
A center post inner thread clamper mechanism is provided near the nozzle 7. The drive source 10 of the clamper mechanism is held by a stopper 14 between the stopper plate 11 and the center guide 5. The center guide 5 has a hole through which the thread 3 passes, but the stopper plate 11 has a plate 12 made of a material having a size larger than this hole and having a high friction coefficient. There is a holding plate 13 on the side. Thread 3 is this plate 12 and the presser plate 13
Clamped between. When the thread holding operation is completed, the clamping operation by the plate 12 and the pressing plate 13 is first activated. At this time, the tension device and the slack remover are each released so that even if the clamps by the center post inner thread clamps are released when all of them are completed, the remaining tension of the thread 3 causes the thread 3 to move from the center guide 5. Do not fall out.

After the thread is clamped by the thread clamp mechanism in the center post,
If thread 3 is pressed into the center post with thread clamp 91,
It will be as shown in the figure. This thread pressing work is for the next core 1
The thread end 3a at the beginning of sewing when attaching the
Also has an effect of preventing being caught between the inner diameter of the core 1 and the outer diameter of the center post 8.

Fig. 25 shows the slide block 75 in the end thread sewing process.
Shows the state in which the work performed using half of the above has been completed. Since the thread end 3b at the end of sewing is hardened at the root 3f of the thread, it cannot be unraveled.

In this state, the slide block 75 is moved by the drive source 73 as described above, and as shown in FIG.
98 thread processing.

A heater mounting plate 96 is attached to the drive source 95 and the guide bar 97 so that the heater 98 approaches the coil 2 at an angle. The heater 98 has a coil shape and a certain length in the circumferential direction of the coil in order to more reliably catch the yarn end 3b. First, the heater 98 has an angle of 10 to 15 mm from the coil 2 of the yarn end 3b to an angle at the coil 2. Approach relatively slowly. It is suitable that this angle is about 15 to 30 degrees. The reason for slowly approaching is to make the yarn end 3b into a ball shape while melting, and when approaching a certain distance from the root 3f of the yarn, the sensor 99 works and the heater 98 stops. If this is held for a short time, the end thread processing operation is completed and the sewing end thread processing mechanism returns to the original state. Although smoke or the like generated during the yarn processing is not shown, it is natural that the smoke is sucked by the suction device. Although not shown, it is of course possible to hold the melted thread at the sewing end thread end 3b before the sewing is started, like the start of sewing. It does not have to be done if the fixation is done by. Furthermore, it is necessary to make a ball on the thread by the heater processing even in the terminal processing at the end of sewing in order to improve the reliability of the product. By doing so, it is possible to reduce the risk of loosening the root 3f of the yarn due to electromagnetic vibration or the like.
Therefore, this ball of thread must be made very close to the root 3f of the thread, and this must be managed. Although the sensor 99 is used for management in the above embodiment, it goes without saying that a limit switch may be used or the position of the terminal may be measured by another driving source to obtain the distance.

Next, FIG. 27 shows another processing method for the end-of-sewn thread end. In the method shown in FIG. 27, in order to secure the length of the thread end 3b, a claw 121 for hooking the thread 3b is first used, and this claw 121 catches the thread end 3 from the vicinity of the nozzle 7 and then pulls up the C portion. It is designed to be cut with. Therefore, at this time, the thread clamper in the center post must be operated to prevent the thread from falling under the center guide 5 due to the tension even if the thread is cut. On the other hand, if the tension is not applied to the pulled-up yarn, it cannot be cut by the cutter. Therefore, the tension device must be operated until the yarn is pulled up by the claw 121 and the center post inner thread clamper is activated. After that, it is necessary to immediately release the tension device so that the yarn does not fall off due to the residual tension when the center post inner yarn clamper is released.

Now, even if the thread is cut in this way, the sewing end thread end 3
b does not fall off the knitting needle 6. Therefore, when the core 1 is lifted to remove it from the center post 8, the yarn end 3b remaining on the inner diameter side of the coil 2 passes through the root 3f of the yarn to avoid the knitting needle 6, and the yarn end 3b is attached to the outer periphery of the coil 2 as shown in FIG. As shown in, only one comes out.

One embodiment of the present invention by this method will be described with reference to FIGS. 28 to 30. The claw 121 can be rotated by a pin 160. Further, the claw 121 has a protrusion 121a so that when the thread 3 hits the lower part of the claw 121, the thread 3 can be easily hooked by rotating around the pin 160. At this time, the return end of the claw 121
The reference numeral 1a serves to hold it, and the inclination of the entire pawl 121 is adjusted by an adjusting tool 122a provided on the plate 122. On the other hand, the plate 122 is attached to the slide rod 124 by the attachment plate 133. The slide bar 124 is held by the upper and lower plates 126 via the guides 125, and
It moves back and forth by a drive source 123 attached to the upper and lower plates 126 via. The upper and lower plates 126 are supported by a guide bar 129 supported by a guide 129 so as to be slidable in the vertical direction via stoppers 130, and are moved up and down by a drive source 127 attached to a fixed plate 133. The fixed plate 133 is fixed to the plate 45 to which the sewing start thread processing device is attached.

On the other hand, the cutter 137 is held by the cutter holder 134 and is moved back and forth by the drive source 135 which is stopped from rotating. This cutter 13
The height, direction, etc. of 7 can be adjusted by the fixture 136.

The description up to here is for the case where there is not a sufficient distance between the knitting needle 6 and the core 1 and the yarn end 3b cannot be taken long, but the knitting needle 6 is separated from the core 1 after the completion of the racing. The structure does not have to be applied. This is because in these models, the yarn end can be secured by retracting the knitting needle 6 with respect to the core 1. Incidentally, since such a model is well known, its explanation is omitted.

Next, another example of the device for automatically performing only the processing of the terminal 3b of the stator in which only one thread end thread 3b is sewn from the coil 2 in the outer circumferential direction after finishing the lacing processing
Figure 31 shows.

The gantry 140 has a positioning plate 159 for holding the core 1, an inner diameter holder 157 for holding the core 1 from the inner diameter, and a support 158 for supporting the core 1 from the outer diameter. Further, at another position of the gantry 140, there is a gantry 144 for thread treatment, and a suction pipe 141 connected to a suction device (not shown) and held by a holder 142 is provided on the gantry 144. The suction pipe 141 moves back and forth by a drive source 143 held by a mount 144. Further, the pedestal 144 has holders 146 and 147 capable of holding at a certain angle, to which a heater driving source 145 is fixed. The heater 151 can be moved back and forth by another driving source 149, and is attached to the heater mounting plate 150 guided by the guide 161 at this time. The drive source 149 is attached to the plate 148 attached to the drive source 145 described above.

A clamper 156 is further provided on the gantry 140 between the core positioning section and the thread processing section. The clamper 156 is entirely moved up and down by a vertical drive source 153 attached to the pedestal 140 via a mounting tool 152, and the drive source 154
It is designed to be opened and closed by the. The structure of the clamper 156 is omitted because it is similar to that of FIG.

Next, the operation will be described. First, the core 1 having the yarn end 3b is set with the yarn end 3b toward the yarn processing section. When the setting is completed and a processing signal is output, a suction device (not shown) is activated to start suction through the suction pipe 141. Next, the suction pipe 141 is driven by the drive source 143.
Moves forward to near the end surface of the coil 2. Then the thread end 3b
Is sucked into the suction pipe. In this state, suction pipe 14
When 1 is retracted, the yarn end is almost straight toward the suction pipe 141. At this time, the clamper 156 is raised by the driving source 153, clamps the yarn end 3b, and then descends as it is. Since it is desirable to iron the yarn several times as described above, the clamper 156 alternates up and down during the descent, and the drive source 153 is controlled so that the depth of the descent gradually increases. This is controllly simple, and a flip-flop circuit or the like may be used to set the rising time slightly shorter than the falling time. Since the thread terminal 3b has been free until then, there is a lot of slack. For this reason, it is necessary to fully squeeze the first ironing, so it is desirable to advance the suction pipe 141 again and re-clamp it. Of course, it is possible to re-clamp by suctioning once, but it is not suitable when there is a time constraint.

Now, after squeezing a few times, the drive source remains clamped.
The heater 151 comes down by 145. Then, as mentioned above, the work is completed by fusing and making balls.

The method shown in Fig. 31 has the meaning of earning tact time.
Alternatively, since it can be used as a post-processing device for a current racing device, it can be said to be an extremely useful system. Of course, it goes without saying that it may be combined with a racing device.

By the way, in the above embodiments, the one-sided lacing device has been described, but it goes without saying that the present invention can be implemented as a two-sided lacing device. At this time, of course, it is necessary to determine the advancing / retreating direction of each mechanism in consideration of the mounting space and the like.

Further, in the above embodiments, the actuators such as air cylinders are used for each mechanism, but one robot or a plurality of robots may be used to perform the processing by each mechanism described above. Needless to say.

[Effects of the Invention] As described above, according to the present invention, the sewing start end of the racing thread can be extended above or outside the stator coil end. Can be easily automated, which can prevent an increase in fatigue due to manual work and a decrease in safety due to harmful smoke.In addition, automation facilitates product quality control.
It is possible to easily provide a lacing device that helps supply a reliable product.

[Brief description of drawings]

FIGS. 1 (a) and 1 (b) are explanatory diagrams showing an example of a conventional method for manually lacing yarn ends, FIG. 2, FIG. 3, and FIG. 4 are examples of lacing yarn end treatments by multiple stitches. FIG. 5 to FIG. 9 are explanatory views showing an example of a lacing yarn end treatment operation according to the present invention, and FIG. 10 is an overall configuration diagram with a partial cross section showing an embodiment of a lacing device according to the present invention. FIG. 11 is a front view showing an embodiment of the clamper, FIG. 12 is a plan view of the embodiment of FIG. 10, FIG. 13 is an explanatory view of processing operation, and FIG. 14 is another embodiment of the present invention. 15 is an overall configuration diagram showing an example, FIG. 15 and FIG. 16 are overall configuration diagrams and a plan view showing still another embodiment of the present invention, and FIGS.
19 and 20 are operation explanatory views, FIG. 21 is a plan view showing one embodiment of the slack removing tool, and FIGS. 22 and 23 are Operation explanatory view, FIG. 24 is an explanatory view showing an embodiment of the thread clamp mechanism, FIGS. 25 and 26 are operation explanatory views, FIG. 27 is an explanatory view showing an example of a racing thread sewing end terminal processing, FIG. 28 is a plan view showing an example of a racing thread sewing end terminal processing device, FIGS. 29 and 30 are enlarged views of the same main parts, and FIG. 31 is an overall view showing another example of a racing thread sewing end terminal processing device. It is a block diagram. 1 ... Stator core, 2 ... Stator coil, 3 ... Racing thread, 5 ... Center guide, 6 ... Knitting needle, 7 ...
Nozzle, 8 ... Center post, 9 ... Air nozzle, 18 ...
… Clamper.

Claims (1)

[Claims] 1. Stator driving means for intermittently rotating a stator core held substantially horizontally, and knitting needle driving for driving a knitting needle in relation to the stator in ascending, descending, advancing and retracting, and twisting directions with respect to the stator. In a lacing device for knitting a stator coil end by a single-thread chain knitting, a sewing thread pulling-out means for grasping a sewing start end portion of a sewing thread and pulling it out in an outer peripheral direction from an inner circumference of the stator coil end, and the sewing thread pulling-out means. Draw-out position moving means for moving the drawing-out position of the sewing start end portion of the sewing machine in the left-right direction with respect to the drawing-out direction of the sewing thread, and the multiple stitching operation by the stator driving means and the knitting needle driving means at the start of the knitting operation. And a control means for operating the pull-out position moving means alternately a plurality of times.