JPS58104878A - Thread binding method and its device - Google Patents

Abstract

PURPOSE:To automate thread binding by suspending a thread on an object binding section to extract the starting end of the thread through the final loop and by holding the starting end and ending terminal of the thread to apply an attractive force to the thread, to swing it, and to tighten and bind it. CONSTITUTION:A thread 25 is extracted from a feed bag and is suspended on a reel 8 and guide reel 20, then is inserted into a nozzle 18, and the starting end extracted from the tip is held between fingers 32, then tension is applied to it. Next, a protrusion plate 78 is protruded to a position that its tip passes above a crochet needle 72 and the thread 25 is wound on the axis of the crochet needle 72 while it is extracted through the nozzle 18. Since the thread 25 is formed in a loop, the crochet needle 72 is moved through the loop, thus the thread 25 is wound once around a stator coil 2. The crochet needle 72 is further rotated by 180 deg. to form a new loop, the starting end of the thread is inserted through the new loop and held, then a holding section 110 is swung to tighten the thread.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thread tying method and apparatus for winding threads around a large number of wire rods and tying them together.

For example, in a knitting machine for bundling the end coils (parts that protrude from the stator core) of the stator coils of electric motors, thread 1 is pulled out from between the end coils and the stator core to create a loop, and the end coils are threaded through the loop. It has been proposed that the thread be pulled out through the top and knitted one after the other using the chain stitch principle to create a loop.

However, in the knitting and stitching machine described above, after the yarn is knitted, the starting and ending ends of the yarn must be tied and fixed manually, resulting in low work efficiency.

Automation is also difficult. In addition, in order to tie the threads stronger than the tension of the threads during one knitting process, an extremely large force must be applied when tying the starting and ending ends of the threads.

It has drawbacks such as being tied with weak cohesion.

An object of the present invention is to provide a thread tying method and a tying device that can eliminate the drawbacks of the prior art described above, automate thread tying, and obtain sufficient binding force.

In order to achieve the above object, in the present invention, after a thread is hung around the binding part of an object using the principle of chain stitching, the starting end of the thread is pulled out through the final loop, and the starting end and the terminal end of the thread are held.
The method is characterized in that when an attractive force is applied to the thread, the thread is swung, the thread is tightened and tied, and the excess length of the thread is cut above the knot.

An embodiment of the present invention will be described below with reference to the drawings.

1 to 6 show an embodiment of the present invention. In the figures, a thread tying device has a stator 3 on which a stator coil 2, which is an object to be thread tying, is wound on a base 1. It consists of a U-shaped stand 4 that supports the holder, and various means arranged around it. That is, a yarn supplying means A that supplies a yarn for tying the stator coil 2, a starting end holding means B that holds and fixes the starting end of the supplied yarn, and a tying section of the stator coil 2 that binds the supplied yarn. A thread hooking means C for winding the thread around the binding part, a tightening means C for holding and tightening the starting end and the terminal end of the thread wound around the binding part to form a knot, Cutting means E for cutting the long valve
It consists of

The supply means A is supported by a bracket 5 erected on the base 1. A pair of reels 8 are rotatably supported on a bracket 6 fixed to the back i1 of the bracket 5 by a pair of shafts 7 erected at a predetermined interval. One of the reels 8 is connected via a constant torque clutch 11 to a motor 10 supported by a bracket 9 fixed to the bracket 6, and a rotational force is applied in the direction of the arrow shown in FIG. A bracket 12 is fixed to the upper end of the front surface of the bracket 5, and a cylinder 1 of five cylinders is vertically supported at the tip of the bracket 12. A bracket 15 is fixed to this cylinder 150 rod 14.

A block 17 is swingably supported on the front surface of the bracket 15 via a shaft 16, and an L-shaped nozzle 18 is fixed to the lower end of the block 17. Further, a guide reel 20 is rotatably supported on the upper part of the block 17 via a shaft 19. Said bracket 1
A cylinder 21 is fixed to the lower end of the block 17, and a cam 25 supported by the tip of the rod 22 of the cylinder 21 faces the lower end of the block 17. The old cylinder passes through the hole 24 of the bracket 5 in a slidable manner. The yarn 25 is pulled out from a supply pack 26 attached to the base 1, and is drawn out from the reel 8 and the guide reel 2.
0, then passed through the nozzle 18 and pulled out from its tip.

With such a configuration, a force that constantly pulls the yarn 25 back toward the supply bag 26 acts on the yarn 25 as tension.

Further, as the cylinder 15 is operated, the nozzle 18 is lowered from the standby position to the operating position.

Furthermore, it reciprocates between the upper and lower parts of the binding part.

On the other hand, when the cylinder 21 is actuated, the cam 2s cover block 17 is pushed by the cylinder 21, and the nozzle 18 is swung toward the back side 11 of the surface 4 in FIG. 25 to the hook needle described later.

The starting end holding means B is supported by a hook 27 fixed to the center of the bracket 5. A cylinder 28 is fixed to the rear end of the bracket 27. A slider 29 is slidably mounted on the bracket 2 and connected to the rod 50 of the cylinder 28.

A pair of shafts 5 are provided at the tip of the slider 29 at a predetermined interval.
1 is erected, and fingers 52 are movably supported on each shaft 51, thereby forming a chuck for holding the starting end of the thread 25. A spring 55 is mounted between the fingers 52, and applies rotational force to the finger s2 to open the holding portion of the finger s2. (button fixed to the rear of the slider 29)! Cam 5 coupled to rod 56 of 54VC supported cylinder s5
7, each of the fins engages with the rear end of 32.

With such a configuration, when the cylinder 35 is actuated to advance the cam 37, the tip of the finger 32 closes, and when the cam 37 is moved backward, the force of the spring 35 opens the tip of the finger 32. Further, when the cylinder 2B operates and protrudes its rod 3o, the tip of the finger 32 reaches a point where it can grip the thread 25 stretched between the nozzle 1B at the descending end and the pulling section described later. When the rod 3o is moved forward and the rod 3o is moved back, the finger 32 is moved back to the standby position.

The thread hooking means C has a winding part C that winds the thread 25 around the binding part.
+, and a starting end extrusion part Cz for passing the thread 25 held by the starting end holding means B to the starting winding part.

The winding portion C1 is supported on the base 1 by a pair of guides 58 positioned in front of the table 4 and erected by a diagonal. An elevating base 42 is connected to a pair of slide pads 59 that are slidably fitted into the guide 58 and to the tip of a rod 41 of a cylinder 4o attached to the base 1. A cylinder 44 is supported via a pair of brackets 4s fixed to the lower surface of this elevating base 42.

The lifting base 42 has a groove 45 on the top surface and a groove 4 on the end surface.
6 are formed respectively. #14 of lifting base 42
A slider 47 is slidably fitted and mounted on the cylinder 5, and is connected to the bellows 49 of the cylinder 44 with a bracket 48. On the slider 47.

A bearing 50 is fixed and rotatably supports a sleeve 52 in which a meticulously parallel elongated hole 51 is formed in the center. Also,
A bracket 5S is fixed on the slider 47.
A 180° rotating cylinder 55 is supported so that the fine center of the rotating shaft 54 coincides with the axial center of the sleeve 520. The rotation shaft 54ri of this cylinder 55, the sleeve 5
2 and is coupled to the sleeve 52 with a key 56. Further, a lever 57 is fixed to the other end of the rotating shaft 54. A link 60 is connected to the bracket 58 erected on the slider 47 via a shaft 59.
is swingably supported. An elongated hole 61 is formed at one end of the link 60, and a groove 62 is formed at the other end. A stopper 64 is slidably fitted and supported on the guide 65 fixed to the slider 47 so as to be located between the cylinder 55 and the bracket 5B, and a pin 65 implanted in the stopper 64 Groove 62 of link 60
It is slidably fitted.

A long hole 66 and a link 60 formed in the bracket 58
A pin 67r that slidably passes through the elongated hole 61! is installed in the movable pulley 8, and the stopper 64 is slid by the movement of the movable bracket 68.・The bearing 5
A cylinder 700 and a cylinder 71 supported by a plastic plate 69 fixed on top of the cylinder 70 are connected to the movable bracket 68, and when the cylinder 70 operates, the cylinder 700 is supported by a plastic plate 69.
move back and forth. A hook 72 is rotatably supported at the lower end of the movable bracket 8. One end of the hook 72 is slidably fitted into the sleeve 52,
A pin 75 that slidably fits into the elongated hole 51 of the sleeve 52
It is connected to the sleeve 52 by. Also, hook needle 7
A $74 for hooking the thread 25 is formed at the tip of the thread 2.

With such a configuration, when the cylinder 40 operates, the hook 72 moves up and down. In addition, by the operation of the cylinder 44, the thread 25 is reciprocated between a working position for winding the thread 25 around the tying part and a standby position. Furthermore, the actuation of the cylinder 550 causes the hook 72 to rotate. On the other hand, due to the operation of the cylinder 70, the hook 72 slides across the upper and lower parts of the 49 parts, and projects to a position where the thread 25 pulled out from the nozzle 18 can be caught in the groove 74. After hooking, the tip of the hook 72 is retreated to a point II where it passes through the previously formed loop. At this time, as the movable bracket 68 moves, the stopper 64 also slides, so if the operations of the cylinders 55 and 70 are synchronized, the hook 72 can be rotated approximately 900 degrees and then stopped. 9.1° The starting end extrusion portion Cs is supported by a bracket 75 fixed to the bracket 5 so as to be located below the starting end holding means B. This bracket 75 has
A cylinder 76 is supported, and an extrusion plate 78 is fixed to the tip of the rod 77.

A groove 79 for regulating the position of the thread 25 is formed at the tip of the extrusion plate 7B.

With such a configuration, when starting to wind the thread 25 around the tied portion, the finger 52 of the starting end holding means B and the nozzle 1B of the thread supplying means A (at this time, the nozzle 18 is located at the lower end) The thread 25 stretched on the threshold of
8, the hook 72 protrudes through the bottom of the 49 section.
Press it against the 0 shaft part, and insert the thread 25 into the groove 74 when the hook needle 72 retreats.
Let me hook you.

Further, at the end of winding the thread 25 (at this time, the nozzle 18 is at the rising end), the starting end of the thread 25 stretched between the fingers 32 and the 49th part is pushed by the extrusion plate 78, and the starting end of the thread 25 is pushed above the 49th part. It is pressed against the shaft of the hook 72 that protrudes through it, and is hooked into the groove 74 when the hook 72 retreats.

The line means □゛1゛D includes a pulling part for pulling up the starting and ending ends of the thread 25 wound around the bound υ part by the thread hooking means C to a position where they can be gripped by a chuck to be described later. ,
The chuck holding the starting end and the terminal end of the thread 25 is made to swing in the direction in which the thread 25 is wound, and a tightening part is used to bind the thread 25. The linear means is composed of two units having essentially the same configuration, so only one will be explained and the other will be given the same reference numerals.

The pulling part D1 is supported by the back surface of a placket 8G which is erected on the pace 1 in parallel to the winding direction of the thread 250. A bracket 81 fixed to the bracket 80
The rod 8s of the cylinder 82 supported by the cylinder 82 is slidably passed through the bracket 80. A U-shaped hob 84 is fixed to the tip of the rod 85. A pair of leaf springs 85 are attached to the opening of the holder 84 so that the spacing becomes narrower toward the bottom of the holder 84.

A gap smaller than the diameter of the thread 25 is formed between the tip of the leaf spring 85 and the bottom of the holder 84.

With such a configuration, the thread hooking means CK
The starting end (stretched between the bound part and the groove 74 of the hook 72) and the terminal end (between the bound part and the nozzle 1
After the holders 84 are held by the holders 84 and the threads 25 are held by the holders 84,
The holder 84 is pulled up and the starting and ending ends of the thread 25 are stretched in a direction substantially perpendicular to the direction in which the thread 25 is wound around the binding portion.

At this time, with respect to the movement of the holder 84, the thread 25 slides inside the holder 84 with a small force, and no more than necessary tension is applied.

The tightening portion 1h is supported by the bracket 80. A pair of upper and lower blocks 86 are fixed to both sides of the front surface of the bracket 80, and a pair of guide pavers 87 are fixed in parallel and perpendicularly therebetween at a predetermined interval. Further, a cylinder 89 is vertically supported by a pair of upper and lower brackets 88 fixed to the center of the bracket 80. The rod 90 of this cylinder 89 is
It protrudes downward. On the back, the above-mentioned Gaitono<8
Elevating plate 92r fixed with two pairs of blocks 91 that slidably fit with 7! , is connected to the rod 90 of the cylinder 89 by a bracket 93 fixed to the rear surface. Therefore, when the cylinder 89 operates, the elevating plate 92 moves up and down along the guide pawl 87. A protrusion 94 is formed on the side surface of the elevating plate 920 . A shaft 95 and a shaft 96 are erected at the upper front surface of the elevating plate 92 and at the center of the protrusion 94, respectively. The shaft 9
At one end of 5.

A plate 97 is swingably supported. On the other hand, one end of a five-position cylinder 98 is rotatably fitted and supported on the shaft 96, and the tip of the ay rod is rotatably connected to a bin 100 erected on the back side of the plate 97. are combined. Therefore, when the cylinder 9B operates, the plate 97 swings about the shaft 95. A bracket 101 is fixed to the front surface of the plate 97,
A cylinder 02 is supported by this bracket 101 vertically 1 and with its mouth 1° rad 105 facing downward. Said lot,・
,. 3゜Bottom end 2 fixed position Ji □-A 24. . At 4.

-105, a pair of links 106 are rotatably supported. On the other hand, a pair of shafts 107 are implanted at a predetermined interval in the lower part of the plate 970 Krj.

Each finger 108 is rotatably supported on one of the shafts 107. The upper end of each finger 108 is
It is rotatably connected to the free end of the link 106 by a shaft 109. Further, at the lower end of each finger 108, a thread 2 is attached.
A holding portion 110 for holding 5 is formed. The link 106° axis 109. The fingers 108 constitute a chuck. This chuck is opened and closed by the operation of the cylinder 102.

With such a configuration, with the holding part 110 of the chuck opened by the operation of the cylinder 102, the seventh cylinder 89 is actuated to lower the chuck and align the thread 25 and the holding part 110. .

It is chucked closed by the operation of the 7-rimmer 102, and the thread 25' is held in the holding part 110. Next, the cylinder 98 is actuated to swing the shack, and the thread 25 is moved to 11.
.

Tighten up. When the chuck is oscillated a predetermined number of times, the cylinder 98 stops at the neutral position. This way □
In this way, the binding part is tightened and a knot is formed.

The cutting means E has a cutting section E that cuts the starting end and the terminal end of the thread 25 above the knot formed by the fastening means.
1, and the thread 25 held in the holder 84 of the pulling part DI.
and a starting end removing part El that pulls out and removes the starting end from the holder 84 after cutting.

The cutting portion El is supported by a bracket 111K fixed to the bracket 80. This bracket 111 has a cylinder 112 that passes through the bracket 8o.
is supported, and a movable blade 114 is fixed to the tip of the rod 115.

With such a configuration, the movable blade 114 is moved from the current position across the upper part of the knot by the operation of the cylinder 1120, and cuts the thread 25 being pulled upward from the knot to the required length. .

The starting end removing part 1h has almost the same configuration as the starting end holding means B, and has a structure similar to that of the starting end holding means B.
) 115.

A cylinder 116 is fixed to the rear end of this bracket 115, and the bracket 115 is attached to the tip of a rod 117.
A rear end of a slider 118, which is slidably supported in suspension, is coupled to the rear end of the slider 118. A pair of shafts 119 are erected at the tip of the slider 118 at a predetermined interval, each shaft 119 rotatably supports a finger 120, and constitutes a chuck for holding the starting end of the thread 25. has been done. A spring (not shown) is inserted between the fingers 1200, and applies a rotational force to the fingers 120 to open the holding portion of the fingers 120. □A cylinder 122 is supported by a bracket 121 fixed to the slider 118, and a cam 124 connected to the tip of the rod 125 engages with the rear end of the finger 120.

Below the bracket 115 is the cylinder 11
In parallel with the rod 117 of 6, an L-shaped stripper 125
is arranged, and one side of the L-shape is located in the path of the starting end of the thread 25 drawn out by the finger 120. And below the stripper 125.

A box 126 is placed on the base 1.

With such a configuration, the cam 124 is moved backward by the operation of the cylinder 122, and the holding portion of the finger 120 is opened, and the cylinder 116 is actuated to move the slider 11.
8 and advances the finger 120 to a position where the starting end of the thread 25 can be held.

Then, the cylinder 122 is actuated to advance the cam 124 and close the holding portion of the finger 120.

Hold the starting end of the thread 25. In this state, wait until the thread 25 is cut. When the thread 25 is cut at the cutting portion E1, the cylinder 116 is actuated to retract the finger 120 and pull out the thread 25. Then, when the thread 25 is pulled out from the holder 84 and pulled out from the bracket H30, the cylinder 122 is activated.

The cam 124 is retracted and the holding portion of the finger 120 is opened. If the finger 120 is further retreated in this state, the thread 2
5 is caught on the stripper 125) and removed from the finger 120. The thread 25 then falls into a box 126 placed below the stripper 125 and is collected.

Note that the U-shaped opening of the table 4 is connected to the cutting means E.
It is arranged so as to face the bracket 80 which is not arranged. A hole corresponding to the opening of the base 4 is formed in the bracket 80, and the stator core 3 is supplied through this hole.

be discharged.

In the above configuration, the stator S is held by a transport means such as a pick-and-place unit (not shown),
The stator 5 is supplied to a predetermined position of each vehicle 4 through the hole of the bracket 80 and the opening of the base. On the other hand, the thread 25 is
The supply nozzle (pulled out from the hook 26, hung on the reel 8 and the guide reel 20, then inserted into the nozzle 18,
The starting end pulled out from the tip is held between the fingers 62. Next, the motor 10 is activated to apply tension to the thread 25. Further, the hook needle 72 at the lower end is moved from its standby position to the working position by the operation of the cylinder 44.

When the preparation for work is completed in this way, the nozzle 18 is lowered to the lowering end by the operation of the 7 cylinder 13. Then, by operating the cylinder 70), the hook 72 passes under the binding portion of the stator coil 2 and projects until the tip of the nozzle 18 passes through the groove 74. At this time.

jC) The collar 64 protrudes rearward. When the cylinder 55 is operated in this state, its rotating shaft 54 rotates until the lever 57 hits the stopper 64. Then.

The hook 72 also rotates, and the opening of the groove 74 that protrudes downward is now oriented horizontally. In this state, the cylinder 76 is operated to project the push-out plate 78 to a position where its tip passes past the above-mentioned hook 72. Then, the finger S2
The thread 25 stretched between the extrusion plate 78&C and the nozzle 180
The hook 72 is twisted and pushed while being pulled out from the nozzle 18.
It is wrapped around the shaft of. Then, when the cylinder 70 is actuated to move the hook 72 backward, the thread 2 is caught in the groove 74 of the hook 72.
Hook 5.

The thread 2s is pulled out from the nozzle 18. At this time, when the hook 72 retreats to its proper position, the stopper 64 separates from the turning surface of the lever 57, so the operation of the cylinder 5s causes the hook 72 to move backward.
2 rotates so that the opening of the groove 74 faces upward. On the other hand, the push-out plate 78 is retracted by the operation of the cylinder 76. In this way, the hook 72 retreats, its tip comes out from under the stator coil, and when the cylinder 70 stops,
Cylinder 4° operates to move hook needle 72 to stator coil 2.
Push it up to a position higher than the top of the . At the same time, cylinder 1
! 1 is activated, and the nozzle 18 is pulled up so that the tip of the nozzle 1B is higher than the hook 72. In this state,
Cylinder 70 is activated again to project barb 72 until groove 74 passes under the tip of nozzle 18 . At this time,
The thread 25 hooked into the groove 74 of the crochet needle 72 is detached from the groove 74 due to its tension immediately after the crochet needle 72 starts moving. However, since the thread 25 is looped, the hook 7
2 moves through the loop. Also, hook needle 72
Along with the protrusion, the stop flange 64 also protrudes. and,
When the cylinder 55 is actuated, the rotating shaft 54 rotates until the lever 57 fixed to one end comes into contact with the stopper 6tK, and the opening of the groove 74 of the upwardly protruding hook 72 is turned almost horizontally. In this state, when the cylinder 21 is operated and the cam 25 is projected, the block 17 is moved by the cam 25.
The lower end of is pushed, and the block 17 and nozzle 18 swing about the shaft 16. child.

Therefore, the thread 25 pulled out from the nozzle 18 is
It is wrapped around the shaft of No.2. In this state, the cylinder 70 operates to move the hook 72 backward. Then, the groove 74 of the hook 72 hooks the thread 25, and the hook 72 retreats while pulling out the thread 25 from the nozzle 18. Further, when the stopper 64 retreats as the hook 720 retreats, the cylinder 55 causes the hook 720 to move backward.
2 is turned so that the opening of the groove 74 faces downward.

And the hook needle 72.

Retract until the tip passes through the loop.

In this way, one winding of 250 threads around the stator coil 2 is completed. And if necessary.

Repeat the same operation as above (1). The thread 25 can be wrapped twice or more.

When the hook 72 that pulls out the thread 25 from the upper side of the stator coil 2 passes through the loop and returns to a predetermined position, the cylinder 70 stops. 4, the cylinder 55 operates to rotate the hook 72 by 180 degrees and direct the opening of the groove 74 upward to form a new loop. In this state, the cylinder 70 is operated and the hook 72 is passed through the newly formed loop.

and then pass it through the outside of the previously formed loop.
It passes over the stator coil 2 again and the nozzle 18
protrude downward. This color.

The thread 25 caught in the groove 74 of the hook 72 separates from @74 immediately after the hook 72 starts moving due to its tension. Then, the groove 74 of the hook 72 is opened by the operation of the cylinder 55.
is turned sideways. In this state, the supply/exhaust port of the cylinder 550 is communicated with the atmosphere, the pressing force of the cam 57 is released, and the holding force YM of the thread 25 by the finger S2 is released. Then, cylinder 76 operates.

The starting end of the thread 25 is pushed by the pushing plate 78 and wound around the shaft of the hook 720. At this time, the starting end of the thread 25 slides between the fingers 520 and is pulled out from the fingers 32. In this state, when the cylinder 70 is operated to move the hook 72 backward, the groove 7
4, hook the starting end of the thread 25 and retreat. and,
While the hook 72 is retracting, □ rotates so that the groove 74: faces downward K in the same way as above, and
I: Pass the starting end of the thread 25 through the newly formed loop. On the other hand, the extrusion plate 78 is.

The cylinder 76 is operated to move backward. and.

When the tip of the hook 72 exits the loop, the loop is contracted by the tension applied by the motor 10 and the thread 25
Press the starting end of Therefore, the length of the starting end of the thread 25 is
The length is such that when the tip of the hook 72 that has hooked the starting end of the thread 25 pulls out a new loop, the end of the starting tip passes between the fingers 52.

Or maybe just make it a little longer. on the other hand.

The cylinder 21 operates, causing the cam 17 to retreat and the nozzle 1
Return 8 to its original position. In this state, the pair of cylinders B2
is activated to cause the holder 84 to protrude toward the starting and ending ends of the yarn. That is, one holder 84 is attached to the starting end of the thread 25 stretched between the knot of the thread 25 and the hook 72, and the other holder 84 is attached to the terminal end of the thread 25 stretched between the knot of the thread 25 and the nozzle 18. The threads 25 are held by fitting the openings of the holders 84 into the openings of the holders 84 and pushing the threads 25 through the leaf springs 85 until they hit the bottom of the holders. In this state, the cylinder 44 is operated to retract the hook 72 to the standby position. Then, the starting free end of the thread 25 is pulled out from the loop and holder 84. On the other hand, the cylinder 1st is operated to raise the nozzle 18 to the rising end. Next, by operating the cylinder 82 and retracting the holder 84 holding the thread 25, the thread 25 is pulled up in a direction substantially perpendicular to the direction in which it is wound around the binding portion. In this state, when the cylinder 102 is actuated to pull up the seal 104 to open the holding part 110 of the finger 10B, and the cylinder 89 is actuated to lower the finger 108, the holding part 511
0 moves to a position where the holder 84 can hold the starting end or trailing end of the thread 25 pulled up. Then, the cylinder 102 is operated to close the holding portion 11Q and hold the thread 25. Next, the cylinder 116 is operated to push out the slider 118 and move the finger 120 forward to a position where it can hold the starting end of the thread 25, and then the cylinder 1
Activate 22.

The holding portion of the finger 120 is closed to hold the thread 25. In this state, cylinder 9B is operated.

Then, the plate 97 swings about the shaft 95 in a direction parallel to the winding direction of the thread 250 in the binding part, so the fingers 108 and the holding part 110 also swing at the same time, and the thread held in the holding part 110 swings. Pull 25 to tighten. and,
After the cylinder 9B reciprocates several times from its neutral position to forward and backward movement positions set before and after it, it stops at the neutral position and finishes tightening. Note that the #upper blade can be set arbitrarily depending on the pressure of the air supplied to the 7 cylinder 9B. Also, the length of the cylinder stroke is 980.

The length of the thread 25 wound around the binding part is made sufficiently larger than the length to be pulled out from the knot by tightening. When tightening is completed, the cylinder 55 operates and the fingers 52Yfiv
lti, 7 After the cylinder 28 operates and pushes the finger 32 to a position where it can hold the rear end of the thread 25 stretched between the nozzle 18 and the holder 84, the cylinder 35 operates to push the finger 52 to hold the thread 25. At this time, the cylinder 82 is actuated, the holder 84 is lowered, and the nozzle 18. The distance between the holder 84 and the holding portion 110 may be reduced. In this case, the slack in the thread 25 is absorbed by the rotation of the motor 10. Furthermore, the cylinder 82 may be one with a 5-positive scene. By doing so, it is possible to prevent the starting end of the primary thread 25 from becoming longer than necessary, so that the stroke of the cylinder 44 can be reduced and the waste of the thread 25 can be reduced. Next, the cylinder 89 is activated, the finger 108 is pulled up, the thread 25 is loosened between the knot and the holding part 1100, and a predetermined tension is applied.
The cylinder 112 is actuated to cause the blade 114 to protrude and cut the thread 25 between the knot and the holding part 110.

Then, due to the operation of the cylinder 112, the movable blade 114
retreats. At the same time, by the operation of cylinder +02,
The rotation of the finger 108 opens the holding part 110 and releases the thread 25, and the finger 108 rises to the rising end due to the operation of the τ cylinder 89.

Furthermore, at the same time, the cylinder 28 and the cylinder 116 operate to pull the starting end of the shoulder of the thread 25 held by the finger 52 (i.e., the primary thread binding) to the standby position of the finger 52 and hold it there. . On the other hand, the extra length of the starting end of the thread 25 held by the finger 120 is pulled out of the pouch 80. At this time, when the thread 25 is pulled out from the holder 84 and further pulled out from the bracket 80, the cylinder 122 is activated and the finger 120 is opened. Then, when the finger 120 further retreats, the thread 25 hits the stripper 125, separates from the finger 120, and falls into a box 126.

In this way, when the thread tying at one location is completed, the table 4 is integrated with a rotary table capable of index rotation, and while the stator coil 2 is index rotated,
The thread 25 may be wound where necessary, and finally the starting end of the final loop may be pulled out and held with a chuck and tightened.

Alternatively, the necessary parts may be tied one by one.

When the string binding is completed, the stator 3 is taken out by the conveying means and the primary stator 3 is supplied.

In the above embodiment, even if the holding force of the finger 52R1 is released, the thread 25 may be shaped as shown in FIG. That is, as shown in FIG. 4 (α), a groove 52g shallower than the radius of the thread 2s is formed in each holding portion of the finger 52. Alternatively, as shown in FIG. 3A, a protrusion 52k is formed on one side of the finger 32.

Further, the tip of the hook 72 is as shown in FIG.

That is, a groove 74 for hooking the thread 25 is formed at the tip of the hook 72. As shown in FIG. 7, a leaf spring 127 (
When the tension of the thread 25 is loosened, the thread 25 is held with a relatively small force that prevents the thread 25 from falling out of the groove 74, but the thread 25 is allowed to move in and out in the direction of the opening of the groove 74). It may be provided.

If the leaf spring 127 is provided in this way, the thread hooking is done at the end of the process when the starting end of the thread 25 is pulled out.

The cylinder 70 and the cylinder 44 are operated simultaneously, and the hook 7
2 can be retreated to the standby position, thereby shortening the cycle time of the entire device.

Moreover, the holder 84 is %! It is as shown in Figure @8. That is, a pair of leaf springs 85 are attached to the opening of the U-shaped holder 84, and when the thread 25 is inserted from the direction of the arrow, the leaf springs 85 are easily opened and the thread 25 is inserted into the holder 8.
Enter into the bottom of 4. However, once the thread 25 reaches the bottom, it is held down by the leaf spring 85 and is prevented from coming out in the direction of the opening.

In addition, in the above embodiment, if the thread 25 can be fused and cut by heat, a heating element is placed in place of the movable blade 114,
The starting and ending ends of the thread 25 may be welded to the thread 25 wound around the 49 portions at the same time as being fused.

Furthermore, the finger 108 for tightening the thread 25 may be reciprocated horizontally by the swinging lever.

As described above, according to one aspect of the present invention, a loop is created by pulling out the thread whose starting end is fixed and stretched behind the tied part forward from below the 49 part and moving it above the 49 part. ,
Pass the thread through this loop, pull out the thread stretched behind the 49 part from above the binding part through the loop, make a new loop,
Through this loop, pull out the starting end of the thread from above the 49th part, wrap the thread around the 49th part, and then connect the starting end and the ending end of the thread.
After tightening the thread by pulling it in the winding direction around the 49th section, the excess length of the thread is cut, making it possible to tie the thread fully automatically, greatly improving work efficiency. be able to. Also, since no one person is involved, the thread can be tightened evenly.

It has the effect of making the quality of the product uniform.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of the thread tying device according to the present invention, and FIG.
The figure is a right side view with a part of the i@1 figure omitted, and Figure 5 is a
@ Figure 1 is the plan view, Figure 4 is. A plan view showing a state cut almost at the center in the height direction in FIG. 1, and a plan view shown in FIG. 6(a), (J←1. Enlarged plan view and front view of the hook shown in FIG. 4), FIG. 7 is a plan view showing a modified example of the hook. Wards are enlarged views of the holders in Fig. 1. 4...stand, 8...all, 10...
Motor, 11...Clutch. A... Yarn supplying means, 52... Finger, B... Starting end holding means, 72... Crochet needle. 74...Groove, C...Threading means, 10B
...Finger, 110... Holding part. D...clamping means, 114...movable blade. E...Cutting means.

Claims (1)

[Claims] 1. A thread whose starting end is fixed and stretched behind the binding part is pulled out forward through the binding part and moved above the binding partii to form a loop. forming a loop, passing the rear end of the thread behind the binding part 9 and pulling it out over the binding part so as to pass through this loop;
The starting end of the thread is pulled out through this loop and the thread is hung on the tied part, and then the starting end and rear end of the thread are moved back and forth in the winding direction to pull the thread and tighten the thread. After tying up
4111 A thread binding method that involves cutting off the extra length at the starting end and trailing end of the thread. The method for tying a thread according to claim 1, characterized in that the thread is wound around the tying part two or more times. 5. A stand for supporting the object to be tied with a string, a nozzle and a nozzle disposed at the upper rear of the tying part of the object supported by this stand so as to be movable up and down and in the horizontal direction, and a tension applying mechanism that applies tension to the tip of the nozzle, a yarn supply means that supplies the yarn from the tip of the nozzle, and a chuck that is slidably disposed behind the binding section; A starting end holding means for holding and fixing the starting end of the thread pulled out from the thread with a chuck, and a hook disposed in front of the object so as to be movable up and down, slidable and rotatable, and having a hook formed at the tip for hooking the thread, A thread hooking means for drawing out the thread across the upper and lower parts of the binding part 9 and winding the thread around the binding part υ, and a chuck disposed above the binding part so as to be movable up and down and in the horizontal direction. Hold the end of the thread hooked to the binding part. Thread winding involves a pair of linear means that tightens the thread by reciprocating a chuck in the direction, and a movable blade that is arranged to be able to move back and forth across the upper part of the knot of the thread that has been tightened. A thread tying device characterized by being provided with a cutting means for cutting the length. 4. The thread tying device according to claim 5, wherein the table supporting the object is an index table that can be rotated in one step.