JPH0412062Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing the occurrence of fraying on the yarn end guided from the bobbin side to the yarn splicing device during yarn splicing in an automatic winder.

In an automatic winder equipped with a splicing device, the yarn ends on the package cage and bobbin sides are guided to the splicing device during splicing, but generally the yarn ends on the bobbin side are held under suction by a suction pipe. After that, the yarn is guided to the splicing device. At this time, the thread end on the bobbin side is released from the bobbin under no tension, so if the thread is elastic or the thread is not twisted stably, so-called kinks may occur in the guided thread, resulting in a defect. There was a problem with the formation of seams.

In particular, if the above-mentioned crease exists in a mechanical yarn splicing device that produces weaver knots and fisherman's knots, the knot will not be formed because the crease has no tension, leading to knotting mistakes, which can lead to knotting errors in automatic winders. This is extremely inconvenient for taking.

In the present invention, when the thread is released from the bobbin by the suction pipe and guided to the yarn splicing device, a tangle prevention member such as a plate or rod is brought into contact with the tip of the bobbin, and a gap between the tangle prevention member and the bobbin core tube is provided. This is intended to prevent the occurrence of fraying by applying resistance to the thread as it passes through and applying tension to the thread end on the bobbin side.

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

Fig. 1 is a side view of the automatic winder 1, in which there is a splicing device 2 in the center, and behind it there is a suction arm 3 that guides the yarn end on the package side to the splicing device 2, and the yarn end on the bobbin side. YB splicing device 2
A suction pipe 4 is arranged to be able to rotate. There is a clamp plate 5 at the opening at the tip of the suction pipe 4, which normally closes the opening, but when the suction pipe 4 turns to the chain line position in the figure, it contacts the guide plate 6 and closes the opening. It's starting to open. A camshaft 20 built into the automatic winder 1 controls the yarn splicing operation. A rotatable shaft 7 protrudes from the frame of the automatic winder 1 in the vicinity of the bobbin, and a shaft 10 in which a vibration prevention plate 8 formed by bending a rectangular plate and a weight 9 are fitted is attached to the shaft 7. A lever 11 protrudes from the frame of the automatic winder 1 in such a way as to lift the shaft 10 from below, and the lever 11 is interlocked with a camshaft 20 and moves to the operating position 1 shown by the solid line and the chain line in the figure.
Move up and down for 1 minute.

Therefore, the vibration prevention plate 8 is balanced by the weight 9 on the opposite side of the rotating shaft 7, and when the lever 11 is operated in conjunction with a tensor opener to be described later, the lever 11 and the shaft of the vibration prevention plate 8 are balanced. A gap is created between 10 as shown in the first diagram,
The anti-shake plate 8 contacts the surface of the bobbin with an appropriate pressing force determined by the balance with the weight. In other words, if the anti-tangle plate 8 is strongly pressed against the bobbin, the thread to be unraveled will not be able to pass between the plate 8 and the surface of the bobbin and will be cut, or even if it passes, the thread will fly off and the tension will suddenly increase. The pressing force is adjusted by the weight since there is a possibility that the fluctuation may cause cracking.

FIG. 2 shows an embodiment of the driving device for the anti-shake plate 8. As shown in FIG. A connecting rod 28 is connected to a lever 27 that is pivoted about a fixed shaft 26 by a tensor opener cam 25, and the lower end of the rod is connected to a lever 30 that presses a tensor opener rod 29. The lever 30 swings around a fixed shaft 31, and the pressing surface 32 presses against and separates from the end surface of the rod 29. The rod 29 is slidably supported through the fixed plate 33 and the bracket 34, and its tip (not shown) is adapted to move one of the pressing plates of the tensioner 14 shown in the first drawing. A pin 35 is fixed to the middle part of the rod 29, and the pin 35 is fixed to the middle part of the rod 29.
A rocking member 37 having a U-shaped groove 36 engaging the shaft 38 is fixed to the shaft 38 . The shaft 38 is pivotally connected to a fixed bracket of the winder, and one end of a swing lever 40 for actuating the anti-shake member 39 is fixed to the end of the shaft 38. The anti-tangle member 39 is formed by bending the upper and lower parts of a rod 42 that passes through a shaft 41 that is pivotally connected to the winder, with the upper bent part 43 abutting the lever 40 and the L-shaped plate 45 fixed to the lower bent part 44. Alternatively, a substantially U-shaped rod without the L-shaped plate 45 may be used. A rod 46 operates an opening/closing lever of a pre-clearer 47 provided at the lower part of the cutter 13 shown in the first figure, and is operated in conjunction with the lever 40.

Therefore, when the cam 25 rotates in the direction of arrow 48 during the yarn splicing operation, the lever 30 rotates in the direction of arrow 49 via the lever 27 and rod 28, and the rod 2
9 and the rod 29 slides in the direction of arrow 50. At this time, due to the rotation of the swinging member 37, the lever 40 pivots in the direction of the arrow 51 via the shaft 38, and therefore the anti-shake member 39 pivots at a constant angle in the direction of the arrow 52 about the shaft 41. , the angle of the L-shaped plate 45 contacts the tip of the bobbin 21. The bobbin tip means the core tube, and is the part without a thread layer.

The tensor operated by the tensor opener rod 29 is composed of two pressing plates 14a and 14b as shown in FIG. 1, one pressing plate 14b is fixed and the other pressing plate 14a is movable. Possibly and usually by spring force, the pressure plate 14
The end surfaces of a and 14b are pressed against each other, and the pressing plate 14
Appropriate tension is applied to the thread passing between a and 14b.

Next, the explanation will be given according to the order of operation. From the bobbin inserted into the peg 12, the thread passes through the guide plate 6, the pre-clearer 22, the thread cutting device 13, the tension device 14, the front surface of the suction slit 15 which constantly performs suction, and the winding drum 16. The thread is wound up into the package P. If the thread breaks, the thread end on the bobbin side
YB is sucked into the suction slit 15. The camshaft 20 starts rotating in response to a thread cutting signal (not shown) and enters into a thread splicing operation. First, the suction arm 3 turns from the solid line position to the chain line position in the figure, sucks the yarn end on the package side, and then returns to the solid line position again to guide the yarn end to the splicing device 2. Next, the suction pipe 4 turns from the solid line position to the chain line position in the figure. The clamp plate 5 comes into contact with the guide plate 6, and the opening at the tip of the suction pipe 4 opens to begin suction. At this time, the yarn cutting device 13 is activated, and the yarn end YB is cut and sucked into the suction pipe 4. Next, the suction pipe 4 begins to turn to return to its original position.
The clamp plate 5 leaves the guide plate 6 and closes the opening again to clamp the yarn end YB. At the beginning of this pivoting movement of the suction pipe 4, the lever 11 is lowered from the solid line position in the figure to the operating position 11 shown by the chain line. The shaft 1 supported by the lever 11
0 is the vibration prevention plate 8 due to the action of the weight 9.
At the same time, the bent part of the anti-shake plate 8 begins to rotate counterclockwise around the pin 7, and the bent part of the anti-shake plate 8 touches the tip of the bobbin 2.
1, resulting in the state shown by the chain line in the figure.

As the suction pipe 4 continues to rotate further, the thread end YB is released from the bobbin, but as resistance is encountered between the bobbin tip 21 and the anti-tangle plate 8, tension is applied and the occurrence of fuzz is suppressed. It is. When the suction pipe 4 returns to the position indicated by the solid line in the figure, tension is applied, and the thread end YB with no kinks is guided to the thread cutting device 13, the tension device 14, and the thread splicing device 2, where it is spliced with the thread end on the package cage side. It is rolled up again.

Note that the anti-shake member 8 shown in FIGS. 1 and 2,
39 operation, i.e. tensor opener rod 29
FIG. 3 shows a time chart of the operation of the suction pipe 4 and the suction pipe 4, etc.

Line L1 shows the movement of the tensor opener rod 29, line L2 shows the movement of the suction pipe 4, and line L3 shows the movement of the suction arm 3.
Lines L1, L2, and L3 also indicate the shape of each cam.

That is, the rotation of the suction arm 3 toward the package P is performed at the FG, and the yarn end on the package cage side is sucked and gripped at the GH and guided to the yarn splicing device. The suction pipe 4 turns toward the bobbin at CD, suction-holds the bobbin-side yarn end at DE, and guides it to the splicing device. The tensor opener rod 29 is located between AB and arrow 5 in Figure 2.
It is shown that the tensioner is in an open state at the flat portion a, and at the same time, the anti-shake member 39 is in contact with the bobbin tip 21 at AB.

Therefore, the action of the anti-tangle members 8 and 39 in contact with the tip of the bobbin is limited to at least the suction pipe 4.
is completed before suctioning the yarn end on the bobbin side at point D, and the return of the anti-tangle members 8 and 39 to their original positions (solid line position 8 in FIG. 1) is due to the tension on the yarn by the tension device 14. It can be timed to be at the same time or after the code starts.

In FIG. 4, the bobbin storage magazine 53 shown in FIG. 1 is not used in each winding unit, and trays 55 with bobbins 54 inserted and supported are individually conveyed, and the bobbins are transferred to the winding unit 1 with the bobbins inserted and supported in the trays.
An example is shown in which the device of the present invention is applied to an automatic winder of the type that supplies and discharges the winder. That is, the bobbin 54 conveyed by the bobbin supply conveyor 56 is automatically transferred from the bobbin intake position of the winding unit onto the rotary disk 57, guided by the guide plate 58, and positioned at the winding position 54a. , it is wound up in this state. That is, the inclination θ1 of the bobbin 54 with respect to the horizontal plane is smaller than the inclination θ2 in the case shown in the first diagram. Therefore, when releasing the thread from the bobbin 54, there is little release resistance and there is a strong tendency for rippling to occur.The anti-rip member 39 of the present invention is brought into contact with the bobbin tip 21 to provide release resistance, which is further effective. be prominent.

The measurement results of the dust contamination rate in a winder having the above-mentioned vibration prevention device and a conventional winder without the vibration prevention device are shown below. As a yarn splicing device,
Using a pneumatic splicing device that performs yarn splicing by applying a jet of air to the part where the yarn ends on the package cage side and the yarn ends on the bobbin side are aligned approximately parallel, all conditions were the same except for the presence or absence of the chattering prevention device of the present invention. I conducted an experiment below. In other words, if a mechanical knotter is used as a yarn splicing device, the yarn will often not be knotted if there is fluff, as described above, and it is impossible to measure the fluff contamination rate, so a pneumatic splicing device is used. use This shows that the winder having the anti-tangle device of the present invention is particularly effective when it has a pneumatic splicing device. In other words, the pneumatic splicing device performs yarn splicing regardless of the presence of burrs, and the burrs get mixed into the seam, making it impossible to obtain a good seam.

The measurement results are as follows.

In other words, if there is no anti-tangle device, the number of thread splices
Out of 500 yarn splices, the number of times that flutters were found near the seams was 68, which was 13.6%, but in the winder equipped with the flutter prevention device according to the present invention, the number of times that flutters were mixed in was zero for 1030 yarn splices.

As described above, according to the present invention, it is possible to apply appropriate tension to the yarn when guiding the yarn end released from the bobbin side during yarn splicing, and to apply a suitable tension to the yarn when guiding the yarn end that is released from the bobbin side. Also, the occurrence of cracking is suppressed and a good seam can be obtained.

Furthermore, since the separation of the anti-tangle member from the bobbin is controlled to occur at the same time or after the tensor of the winding unit starts applying tension to the yarn, at least the yarn unraveled from the bobbin is completely removed. The chance of a free state is prevented, and the possibility of fraying occurring from the yarn splicing operation to the resumption of winding can be extremely reduced.

In other words, in the present invention, the possibility of occurrence of chattering can be minimized by setting the activation timing of the chattering prevention member and the pressing force of the chattering prevention member against the bobbin to an appropriate strength according to the type of yarn or the inclination of the bobbin. It can be made small and there is no problem in unraveling the thread.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of an automatic winder according to an embodiment of the present invention, Fig. 2 is a perspective view showing the operating mechanism of the anti-shattering member, Fig. 3 is a timing chart of the mechanism, and Fig. 4 is FIG. 7 is a side view of main parts showing another embodiment of the automatic winder according to the present invention. 1... Automatic winder, 2... Yarn splicing device, 4
... Suction pipe, 8, 39 ... Anti-tangle member, 7 ... Rotating shaft, 9 ... Weight, 11 ... Lever, 14 ... Tenser, 21 ... Bobbin tip, 25 ... Tenser opener cam , 29...
Tenser opener rod.

Claims (1)

[Scope of Claim for Utility Model Registration] A yarn splicing device, a suction pipe that clamps and guides the tip of the yarn end on the yarn feeding bobbin side to the yarn splicing device, and In an automatic winder having a tensioner that applies tension to the thread, a vibration prevention member is provided on the outer periphery of the tip of the bobbin and can be brought into contact with and separated from the vibration prevention member, and the vibration prevention member is arranged to prevent contact and vibration associated with the movement of the suction pipe and the tensioner.
It has a separating mechanism, that is, while the thread is unraveled from the bobbin by the movement of the suction pipe, the anti-tangle member contacts the bobbin, and the separation of the anti-tangle member from the bobbin is caused by the tensor to release the thread from the bobbin. is a contact/separation mechanism that starts applying tension at the same time or after the application of tension is started, and the contact of the vibration prevention member with the bobbin is mainly on the side opposite to the rotation axis of the vibration prevention member and the vibration prevention member. An automatic winder having an anti-sharp device characterized in that the winder operates under a pressing force set by balance with a provided weight.