JP2862107B2 - Elastic yarn feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic yarn feeding device in an apparatus for spinning a core yarn using an elastic yarn as a core yarn.

[0002]

2. Description of the Related Art When spinning a core yarn having high elasticity using an elastic yarn as a core yarn, a payout roller for rotating the package rotatably supported by a supporting device at a constant peripheral speed is required to feed the elastic yarn from the package. Usually, the package is brought into pressure contact with the peripheral surface of the package, and the package is rotated to perform a constant-speed feeding.

When such a feeding means is adopted,
This is particularly remarkable when the elastic yarn is a polyurethane elastic yarn. However, the elastic yarn may not be smoothly unwound from the package but may be wound around the package and wound up in the opposite direction, and may be cut off in the course of being supplied to the spinning unit or the like. Such troubles are rare during steady-state operation in which unwinding proceeds under a large tension by being picked up at several times the unreeling speed.However, such as when resuming operation after piecing, the package and its This is likely to occur when the elastic yarn between the take-up means is being fed to the supply target portion with low tension. The reason is that the elastic yarns wound on the package in a tensioned state tend to stick to each other, and if the unwinding yarn tension is not sufficiently large, the elastic yarn being unwound will not be peeled off from the package surface. With the rotation of the package, the already unwound yarn is wound around the package in a reverse winding state.

[0004]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an elastic yarn feeding device which does not cause winding even when the yarn is being taken up with a low tension.

[0005]

SUMMARY OF THE INVENTION In an elastic yarn feeding device for feeding an elastic yarn by rotating a payout roller on which an elastic yarn package is placed, an elastic yarn passing area of a peripheral surface of the feeding roller is provided. A yarn press roller displaceable between a contact position and a position distant therefrom; and a package contacting / separating means for bringing the elastic yarn package into contact with / separating from the feeding roller in conjunction with the displacement of the yarn press roller, and When the press roller comes into contact with the feed roller, the elastic yarn package comes into contact with the feed roller, and when the yarn press roller separates from the feed roller, the elastic yarn package separates from the feed roller.

An elastic yarn feeding device which is driven at a constant peripheral speed and rotates an unwinding roller on which an elastic yarn package is placed to rotate the package to feed out the elastic yarn. The arm is installed so that the package separating plate can enter into the package press-contact portion of the payout roller peripheral surface along with the rotation thereof, and a second arm that rotates integrally with the arm is provided, and a rotatable thread is provided at the end thereof. The holding roller is mounted in parallel with the feeding roller, and the thread holding roller feeds the arm supporting the package separation plate and the second arm when the package separation plate separates from the package press-contact portion with their rotation. The roller was connected so as to be in contact with the elastic yarn passage area on the peripheral surface of the roller.

[0007]

When the elastic yarn is fed by the feeding device, the package is pressed against the feeding roller and rotated, and the yarn holding roller is pressed against the feeding roller to rotate the package. Make a payout. When the feeding is stopped, the package is separated from the feeding roller to stop the rotation of the package, and the thread press roller is pulled away from the feeding roller to stop the feeding of the elastic yarn.

In the case of a device having a package separating plate, switching between pressing and separating the package from the feeding roller is performed using the package separating plate. That is, when paying out the elastic yarn, each arm is turned so that the package separating plate is separated from the package pressing portion and the yarn pressing roller comes into contact with the elastic yarn passing area of the payout roller peripheral surface, and the package is pressed against the payout roller. Then, rotate the package and pay out the elastic yarn. To stop feeding, rotate both arms in the opposite direction, move the package isolation plate into the package pressure contact part, and separate the package from the feeding roller to stop the rotation of the package. Is stopped by moving it away from the elastic yarn passing area of the above.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to an embodiment in which the present invention is applied to an apparatus 2 for manufacturing a core yarn.

The elastic yarn feeder 3 of the present invention, together with the clamp device 4, constitutes the elastic yarn supply device 1, and the elastic yarn Y supplied by the elastic yarn supply device 1 is supplied to the front of the draft part 5 of the core yarn spinning device 2. The elastic yarn is supplied to the front roller 6 from the elastic yarn supply unit 7 on the upstream side of the roller 6.

The elastic yarn feeding device 3 has a feeding roller 1 on a rotating shaft 9 supported by a support plate 8 provided for each weight.
0 is fixed, and the end of the rotating shaft is connected to a motor 12 via an appropriate rotation transmitting means 11 such as a belt. A clutch (not shown) is provided between each feeding roller 10 and the rotating shaft 9, and the feeding roller 10 is driven and stopped for each weight. Each support plate 8
The pivot arms 14 and 15 are supported by being fixed to a shaft 13, and a package separating plate 16 is provided at the tip of the pivot arm 14 to constitute package contact / separation means.
You. A thread press roller 17 is provided at the tip of the turning arm 15.

The lower extension end of the swing arm 14 is a cylinder.
The thread press roller 17 and the package separating plate 16 are interlocked with each other when the piston rod 19 is moved in and out. That is, the piston rod 19
, The thread press roller 17 moves out of the feed roller 10.
At the same time, the package separating plate 16 comes off the nip point between the package 20 and the feeding roller 10 described later, which are placed on the feeding roller 10, and the two are brought into contact with each other. Further, when the piston rod 19 is retracted, the thread press roller 17 separates from the feeding roller 10, and the package isolation plate 16 pushes into the nip point between the package 20 and the feeding roller 10, thereby isolating them.

A package 20 is rotatably supported above the feeding roller 10 by an arm 21 supported by the support arm 8 so as to be pivotable.

The clamp device 4 partially uses a small air cylinder. As shown in detail in FIG. 3, a disk 24 is fixed to the tip of a piston rod 23 of a clamp device main body cylinder 22. The elastic yarn Y introduced into the gap 27 formed by the end surface 25 of the clamp device main body cylinder 22 and the inner surface 26 of the disk 23 can be nipped. Clamp device body cylinder 22 of piston rod 23
A spring 28 is in contact with the inner end, and the piston rod 23
Is constantly urged in a direction to protrude from the clamping device main body cylinder 22 and open the end surface 25 of the clamping device main body cylinder 22 and the inner surface 26 of the disk 24. A stopper 29 determines the width of the nip surface gap 27. One side of the piston 30 integrated with the piston rod 23 is used as an air chamber 31, and an air hose 32 connected to a pressure source (not shown) is opened.

Accordingly, the end face 25 and the inner face 26 are normally open due to the resilience of the spring 28, but when the pressure fluid is pressed into the air chamber 31, the two faces 25 and 26 are closed, and the elastic yarn Y
Nip.

A gutter-shaped guide 33 having a U-shaped cross section is provided so as to cover about the front half of the outer peripheral surface of the clamping device main body cylinder 22. The gutter-shaped guide 33 has a shape in which the upper end is enlarged and the lower end is narrowed, and an air jet nozzle 34 for jetting compressed air inward of the gutter-shaped guide 33 is provided at the upper end. The air injection nozzle 34 is fixed by selecting a position and a posture at which a high-speed air flow flowing in the direction of the elastic yarn supply unit 7 on the clamp device main body cylinder 22 can be blown to the elastic yarn Y. In addition, the supply unit 7 reliably and efficiently puts the elastic yarn on the air flow.
The gutter-shaped guide 33 performs an action for flowing in the direction.

The device 3 of the present invention can be used when supplying the elastic yarn 2 to a supply target such as another sliver or a yarn.
In particular, the present invention is not limited to the production of the core yarn described below.

Next, a description will be given of the feeding of the elastic yarn by this device. All the operations are automatically performed under the control of a control device (not shown).

When the core yarn is being spun normally, the piston rod 19 of the cylinder 18 is in the forward position,
As a result, the pivot arm 14 whose lower end is pushed pivots together with the pivot arm 15 around the support shaft 13 in the clockwise direction in FIG. 1 to draw out the package isolation plate 16 from the roller 10. The swivel arm 15 presses the thread press roller 17 at the tip against the payout roller 10 (the swivel arms 14, 15).
And the above-mentioned turning positions of the tip members fixed to them are shown by solid lines in FIG. 2). As a result, the package 20 supported by the swingable support arm 21 is pressed against the feeding roller 10 by its own weight, and rotates at the same peripheral speed as the feeding roller 10. Further, since the thread press roller 17 is also pressed against the feed roller 10 by the pressing force of the cylinder 18 and rotates with the feed roller 10, the unwound elastic yarn Y
Is fed at a constant speed through the space between the feeding roller 10 and the yarn presser roller 17, and is not affected by fluctuations in the speed of pulling or the tension.

When the feeding device 3 is in the feeding state as described above, the elastic thread clamping device 4 has its cylinder working air turned off. As a result, the piston 30 and the piston rod 23 fixed thereto move forward by the restoring force of the spring 28 until the piston 30 comes into contact with the stopper 29, and the disc 24
Keep away from As described above, the elastic yarn Y is caused to travel in the gap 27 between the disk 24 and the cylinder 25 of the clamping device body. The air injection nozzle 34 is not operating. As described above, the elastic yarn Y is unwound from the package 20 and is taken up by the front roller 6 of the draft part 5. The rotation speed of the feeding roller 10 is slightly lower than the rotation speed of the front roller 6, and the elastic yarn Y is pulled while being pulled three to four times.

When a slab catcher (not shown) detects a thread breakage or the like in the normal operation state, working air is supplied to the air chamber 31 of the clamp device main body cylinder 22 of the elastic thread clamp device 4, and the piston 30 and the piston 30 The rod 23 is retracted against the force of the spring 28, and the disk 24 is brought into close contact with the clamp device main body cylinder 22. As a result, the elastic yarn Y during traveling is clamped between the inner surface 26 of the disk 23 and the end surface 25 of the cylinder body 22 of the clamping device body. After being clamped, the elastic yarn Y, which is continuously pulled by the rotating front roller 6, is clamped by the clamping device 4 and the front roller 6.
You are torn between. On the other hand, the cylinder 18 is actuated to retract the piston rod 19, pivot the pivot arm 14 in the counterclockwise direction, and allow the package separating plate 16 to enter between the package 20 and the feed-out roller 10, thereby causing the package 20 to rotate.
To stop its rotation. Swivel arm at the same time
15 also turns in the same direction, causing the thread press roller 17 to be separated from the feed roller 10. As described above, the feeding of the elastic yarn Y is stopped, and the elastic yarn Y is suspended between the package 20 and the elastic yarn clamping device 4 in a tensioned state (the turning arms 14 and 15 and the tips fixed to them). The above-mentioned turning position of the member is indicated by a dashed line in FIG. 2).

Thereafter, when the yarn splicing by the yarn splicing device is started, the air jet nozzle 34 is operated and air is injected while the yarn end clamp by the elastic yarn clamp device 4 is maintained. The high-speed air flow generated by the injection obliquely collides with the elastic yarn Y above the clamped yarn end, and then flows through the space surrounded by the gutter-like guide 33 toward the front roller 6,
The elastic yarn Y is pulled in the direction of the front roller 6. On the other hand, immediately after the start of air injection, the piston rod 19 of the cylinder 18 is advanced, and the package isolation plate 16 is fed out of the roller 10.
Roller 10 and the yarn presser roller 17
Is returned to the above-mentioned extended state in which it is brought into pressure contact with.

When the yarn press roller 17 is returned in this manner, the elastic yarn Y between the package 20 and the clamp device 4 is loosened (tensile force is released), and an air flow is applied. As described above, the elastic yarn Y is fed into the elastic yarn supply section 7 on the upstream side of the front roller 6 of the draft part 5 while keeping the yarn end clamped.
Although the tensile force of the elastic yarn Y due to the air current is weak, the elastic yarn Y is forcibly fed out while being sandwiched between the rotating pressing roller 17 and the feeding roller 10, so that the unwinding is reliably performed.

The bent end 35 of the elastic yarn Y that has been fed out
When the portion reaches the front roller 6 and reaches the nip point of the roller, the elastic yarn Y unreeled from the package 20
Collection of ₁ begins. Elastic yarn Y ₂ yarn end that is fixed in the elastic yarn clamp device 4, will be immediately torn off. On the other hand, the yarn connected to the package 20 is pulled by the front roller 6 while being in contact with the peripheral surface of the disk 24 as shown by a solid line in FIG. Thereafter, the air injection is stopped, the cylinder working air is turned off, and the disk 24 of the elastic yarn clamp device 4 is moved to the clamp device main body cylinder 22.
When separated from the elastic yarn Y, as shown by the two-dot chain line in FIG.
When the yarn breaks, the supply state returns to the clampable supply state. In the above embodiment, the yarn holding roller 17 and the package separating plate 16 are connected by the arms 14 and 15, and the separating / contacting operation of the roller 17 and the operation of feeding and stopping the feeding of the elastic yarn are interlocked. The operation switching of the thread press roller 17 at the time of switching between the feeding and the stopping of the feeding is surely performed, and a more stable operation can be performed. The above 2
One operation may be driven by individual driving means, and both driving means may be interlocked with each other.

[0025]

As described above, according to the present invention, at the time of feeding out the elastic yarn, the yarn fed from the package is pressed by the yarn pressing roller by pressing the yarn pressing roller against the feeding roller. Does not wrap. Further, at the time of stopping the feeding of the elastic yarn, the yarn pressing roller is separated from the feeding roller, so that the yarn is prevented from being pulled out of the package by the nip between the two rollers. In addition, in the case where a package separating plate is provided so as to be interlocked with the thread press roller, the operation of the thread press roller at the time of switching between the feeding of the elastic yarn and the stop of the feeding is reliably performed, and a more stable operation is performed. Becomes possible.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a core yarn spinning apparatus employing an embodiment of the present invention.

FIG. 2 is a schematic side view showing a main part of the feeding device in FIG.

FIG. 3 is a horizontal sectional view of the clamp device in FIG. 1;

FIG. 4 is a view for explaining automatic supply of elastic yarn in the spinning device of FIG. 1;

FIG. 5 is a schematic side view showing a running state of a yarn Y.

[Explanation of symbols]

 3 Feeding device 4 Elastic yarn clamp device 6 Front roller 10 Feeding roller 14, 15 Rotating arm 16 Package isolation plate 17 Thread holding roller 33 Gutter-like guide 34 Air jet nozzle

Claims (2)

(57) [Claims] 1. An elastic yarn feeding device for feeding an elastic yarn by rotating a package by rotating a feeding roller on which an elastic yarn package is placed. A thread press roller displaceable between a position away from the
The elastic yarn package is fed in conjunction with the displacement of the yarn presser roller.
Package contacting / separating means for contacting / separating from the delivery roller
Provided when the thread presser roller comes in contact with the payout roller.
The elastic yarn package contacts the payout roller and
When the feed roller separates from the feed roller, the elastic thread
An elastic yarn feeding device, wherein a package is separated from a feeding roller . 2. An elastic yarn feeding device for feeding an elastic yarn by rotating a package by rotating a feeding roller on which an elastic yarn package is placed. The separating plate is installed so as to be able to enter the package pressing portion of the payout roller peripheral surface, and a rotatable thread holding roller is attached to a tip of a second arm that rotates integrally with the arm, and each of the arms is attached to the arm. An elastic yarn feeding device characterized in that the yarn pressing roller is connected so as to come into contact with an elastic yarn passing area on the peripheral surface of the feeding roller when the package separating plate separates from the package pressing portion with the rotation.