JPH05302225A - Delivery device for wadding in core yarn production unit - Google Patents

Abstract

PURPOSE:To ensure the suction and unwinding of wadding from a wadding package by providing a means to slacken the wadding in between such package and an air sucker and by slackening the wadding prior to air sucker startup. CONSTITUTION:A mobile guide 2 capable of displacement in such a direction as to cross over wadding F is put in between (A) a guide G on the side of a wadding package P and (B) a tenser T to impart the yarns entering an air sucker 1 with tension. After displacement of the mobile guide 2 to a position 2' prior to air sucker startup, the guide 2 is restored to the original position to make the wadding slack in between the package and the air sucker, thus facilitating suction by the air sucker.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core yarn feeding device in a core yarn manufacturing device.

[0002]

2. Description of the Related Art A core yarn in which a filament yarn is arranged at the core and the periphery thereof is covered with short fibers has a feature that it has both excellent strength of the filament yarn and good feel of the short fiber spun yarn. In the device for manufacturing this core yarn, the core yarn is sent to the draft part of the spun yarn manufacturing device, where it is merged with the sliver in the draft, the short yarn is attached to the core yarn in the draft part, and the core yarn is produced by the air spinning nozzle. The core yarn is completed by entwining the short fibers with each other. In order to automatically feed the core yarn to the above predetermined position at the time of starting the device, a yarn feeding device for unwinding the core yarn from the package and feeding it into the spinning unit inlet is necessary.

Conventionally, a yarn feeding device which has been usually used is one in which a core yarn is sucked by an air sucker, is carried in an air stream in a thin tube and is fed to a draft part, where it is joined with a sliver in the draft.

However, since the tension required to unwind the yarn from the package differs depending on the type of the yarn and the position of the unwinding starting point, when the unwinding tension is abnormally large, the suction force of the air sucker is increased at the time of starting. Dependent core yarn unwinding was not performed smoothly, and it sometimes failed to send the core yarn into the draft part.

[0005]

SUMMARY OF THE INVENTION In view of the above points, the present invention, in manufacturing a core yarn, regardless of the type of the core yarn, sucks the core yarn at the start of suction from the core yarn package by air sucker. It is an object of the present invention to provide a core yarn feeding device in which unwinding is surely performed.

[0006]

In a core yarn feeding device for a core yarn manufacturing apparatus for feeding a core yarn by an air sucker, a means for causing slack in the core yarn between a package of the core yarn and an air sucker. And a mechanism for activating the means for causing the slack before starting the air sucker.

[0007]

In the device according to the present invention, when the core yarn manufacturing device is stopped due to yarn breakage or other reasons and the operation of the air sucker is stopped, the means for causing the slack in the core yarn is activated prior to the start of the air sucker. .. When the core yarn manufacturing apparatus is restarted, the loose core yarn is first sucked. When the yarn speed of the sucked core yarn is increased, the core yarn is pulled out from the core yarn package. The slackened core yarn at the initial stage of pulling out is easily sucked by the air sucker, so troubles associated with difficulty in unwinding when the operation is restarted are avoided.

[0008]

In the apparatus of the present invention, the means for causing the slack in the core yarn F between the package P and the air sucker 1 is arbitrary, and various means can be adopted. Examples of these are shown in FIGS.

In FIG. 1, the core is provided between the core yarn package P and the air sucker 1, more precisely, between the guide G on the package P side and the tensor T which applies tension to the yarn entering the air sucker 1. The movable guide 2 which can be displaced in the direction intersecting with the yarn F is installed. This movable guide 2 is arranged along a straight line connecting the guide G and the tensor T during normal operation (that is, along the traveling path of the core yarn F during normal operation). When slackening the core yarn F, after the core yarn is cut and the yarn end is clamped by a clamp cutter device which will be described later, the movable guide 2 is moved to a position 2'away from the above route while the core yarn F is hooked. The core yarn F is pulled out from the package P and is bent into a V-shape as indicated by the two-dot chain line F ′ by displacing the core yarn F from the package P.
Then, when the movable guide 2 is returned to the original position, the core yarn F is left in a loose state between the package P and the air sucker 1.

In FIG. 2, two movable guides similar to those in FIG. 1 are prepared. 2 movable guides 3,
4 are displaceable in mutually opposite directions with respect to the core yarn F traveling route. Specifically, the movable guides 3 and 4 are supported at both ends of the swing arm with the central portion as a fulcrum, and the swing arm is swung when the apparatus is stopped, so that the movable guide 3 is at the 3'position and the movable guide 4 is at the 4th position. ′
When the core yarns F are displaced to respective positions to have a Z-shaped arrangement, and then the movable guides 3 and 4 are returned to their original positions, the core yarns F indicated by the chain double-dashed line F ′ and the package P are It remains loose between Air Soccer 1.

In FIG. 3, another air sucker 5 is arranged between the package P and the air sucker 1 so that an air flow in a direction intersecting with the core yarn F can be acted on. When the air sucker 5 is actuated when slack is to be generated, the core yarn F is blown off sideways by the air flow, and the core yarn F is pulled out from the package P by the tension generated thereby. If the air sucker 5 is stopped after a sufficient amount of the core yarn F has been pulled out, the core yarn F ′ is left in a loose state between the package P and the air sucker 1.

In FIG. 4, instead of the air sucker 5 in the example of FIG. 3, a flat slack tube 6 is arranged with its opening close to the running path of the core yarn F during normal operation. .. If a suction airflow is generated for a short time when slackening is attempted, the core yarn F is drawn into the slack tube 6 by the airflow flowing into the slack tube 6,
When the air flow is stopped, the sucked core yarn F ′ remains as slack.

Next, an embodiment of the present invention which employs the slack generating means shown in FIG. 1 will be described with reference to FIG.

The core yarn feeding device has a basically well-known structure including an air sucker 1, a tensor T, a guide G, etc., and the tip of the air sucker 1 and the yarn discharging portion 1a are
It is arranged so as to face the sliver S between the apron 8 and the front roller 9 of the draft device via the funnel-shaped guide 7. The movable guide 2, which is a slack generating means attached to the core yarn feeding device, is composed of an L-shaped wire fixed to the tip of an arm 11 which can be swung with a spindle 10 as a swivel axis, and a horizontal portion of the movable guide 2. Is arranged so as to be on the core yarn F, but it can be displaced to the position 2'in the figure by turning the arm 11.

Operation rod 12 for rotating the arm 11.
Is connected to the control system of the back roller 13 of the draft device.

Next, the drive means for the back roller 13 and its control system will be described. Draft device back roller 1
3 has a power transmission system independent of the apron 8 and the front roller 9 so that the supply of the sliver S can be stopped independently when the yarn is broken. That is, the back bottom roller 13a has a pulley 14 integrated therewith, while the pulley 17 is provided on the output shaft 16 of the electromagnetic clutch 15 that cuts off power transmission from a power source (not shown). A belt 18 is stretched between the pulley 17 and the pulley 17. A micro switch 20 is inserted in the power supply circuit of the electromagnetic clutch 15, and when the micro switch 20 is on, the clutch 15 is in an engaged state. In addition to the pulley 17, a disc-shaped stopper 22 provided with a plurality of notches 21 on the circumference is fixed to the output shaft 16 of the electromagnetic clutch 15. Further, the operation arm 25 is rotatably supported by the support shaft 26, and one end 25a thereof is engaged with the push button operation lever 27 of the microswitch 20,
The microswitch 20 is turned on in one position of the turn and the microswitch 20 is turned off in another position of the turn. The other end 25b of the operation arm 25 has a stopper 22.
The operation arm 25 engages with the notch 21 when the micro switch 20 is turned off, but does not engage with the operation arm 25 when the micro switch 20 is turned on. ing.

A rod 28 is connected to the operating arm 25 at the engaging end 25b side of the stopper 22.
The operation arm 25 can be swung by moving up and down. When the rod 28 descends, the operation arm 25
Is at a position (state shown) in which the stopper engaging end 25b separates from the stopper 22 and turns on the micro switch 20, and when the rod 28 rises, the operating arm 25 causes the stopper engaging end 25b to engage with the notch 21 of the stopper 22. The micro switch 20 is turned off.

The rod 28 is connected via a pivotable arm 29 and a rod 30 to a push button 31 arranged on the front side so that it can be operated in front of the core yarn manufacturing apparatus. The push button 31 has a lock mechanism. An iron plate 32 is fixed to the rod 28,
The rod 28 can be held in the lowered position by the attractive force between the iron plate 32 and the electromagnetic magnet 33. The electromagnetic magnet 33 is a slab catcher 34.
Only works when a normal driving signal is emitted from.

The operating rod 12 for turning the guide support arm 11 is connected to the rod 28 by a connecting member 35, and the operating rod 12 is adapted to interlock with the vertical movement of the rod 28.

During normal operation of this core yarn manufacturing apparatus, the electromagnetic magnet 33 continues to operate and the iron plate 32 is attracted,
The rod 28 integrated with the iron plate 32 is lowered and the operation arm 25
Turns on the micro switch 20, and the stopper engaging end 25b thereof is separated from the notch 21 of the stopper 22, so that the power transmitted to the pulley 17 via the electromagnetic clutch 15 is transmitted to the back bottom roller 13a via the belt 18.
Is rotating. At this time, since the operation rod 12 is also lowered and the guide support arm 11 is swung upward, the guide 2 does not bend the traveling path of the core yarn F. In this state, the core yarn F enters between the apron 8 and the front roller 9 of the draft device via the guide G, the tensor T, and the air sucker 1, and merges with the sliver S coming out of the apron 8 to the front. Enter the air spinning nozzle 35 via the roller 9,
Completed here as core yarn, delivery roller 3
6, It is wound by a winding device (not shown) via the slab catcher 34.

In this state, there is a yarn breakage, or a defective yarn passes through the slab catcher 34, and when it is detected by the slab catcher 34 and the power of the electromagnetic magnet 33 is cut off, the attraction force of the iron plate 32 by the electromagnetic magnet 33 is generated. Since it disappears, the restoring force of the spring 36 pivots the arm 29 counterclockwise and pushes up the rod 28. As a result, the operation arm 25 pivots in the clockwise direction, the micro switch 20 is turned off and the electromagnetic clutch 15 is disengaged, and at the same time, the stopper engaging end 25b is formed in the notch 2 of the stopper 22.
1 and the inertial rotation are stopped, the back roller 13
Immediately stops and the supply of the sliver S is stopped. At the same time, since the operating rod 12 is also pushed up, the guide support arm 11 pivots counterclockwise and is displaced to the guide 2'position. Since the clamp cutter 37 at the exit of the air sucker 1 clamps the core thread F at the same time as the thread breaks,
When the guide 2 is displaced to the 2'position with the core thread F hooked and loosened like the core thread F ', the core thread F is pulled out from the package P by that amount.

When the yarn splicing is finished and the operation is restarted,
The rod 30 that pushes the push button 31 and moves to the right
As a result, the arm 29 pivots in the clockwise direction, and when the rod 28 is pulled down, the operation arm 25 operates in the direction opposite to that in the case of thread breakage, and the electromagnetic clutch 15 is closed and the stopper 22
Since the engagement with and is released, the back roller 13a is driven. At the same time, a valve (not shown) of the air sucker 1 is opened to start its operation, and suction of the core yarn F is started. The operating rod 12 is pulled down in conjunction with the lowering of the rod 28 to return the guide support arm 11 and the movable guide 2 to the original position. Therefore, immediately after the restart of the operation, the core yarn in a loose state is present between the guide G and the tensor T. There is an F, which is easily picked up by Air Soccer 1.

In the above embodiment, the slackening means is activated by interlocking with the stop of the core yarn manufacturing apparatus to loosen the core yarn. However, after the core yarn manufacturing apparatus is stopped and before the air sucker is started, the slack is removed. The generating means may be activated, that is, the slackening means may be activated prior to starting the air sucker.

[0024]

As described above, according to the present invention, means for causing slack in the core yarn is provided between the package of the core yarn and the air sucker, and the means for causing the slack is interlocked with the stop of the core yarn manufacturing apparatus. The core yarn can be sucked at a very low tension when the device is started, and the core yarn can be reliably fed into the core yarn manufacturing device regardless of its type.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of means for causing slack in a core yarn.

FIG. 2 is a schematic view showing another example of means for causing slack in the core yarn.

FIG. 3 is a schematic view showing another example of means for causing slack in the core yarn.

FIG. 4 is a schematic view showing another example of means for causing slack in the core yarn. Ru

FIG. 5 is a schematic view showing a usage state of the embodiment of the present invention.

[Explanation of symbols]

 1,5 Air sucker 2,3,4 Movable guide 6 Suction pipe 11 Arm 12 Operation rod 13 Back roller 15 Electromagnetic clutch

Claims (1)

[Claims] 1. A yarn feeding device for a core yarn manufacturing apparatus for feeding a core yarn by an air sucker, wherein means for causing slack in the core yarn is provided between a package of the core yarn and the air sucker, and the slack is eliminated. A core yarn feeding device in a core yarn manufacturing apparatus, characterized in that a mechanism for activating the generating means prior to starting the air sucker is provided.