JP2626500B2 - Splicing method for spinning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a splicing method for splicing cut spun yarn in a spinning device for producing a spun yarn having a spinning nozzle utilizing swirling air flow.

[0002]

2. Description of the Related Art Conventionally, in a spinning apparatus for producing a spun yarn by utilizing a swirling air flow, when the spun yarn is cut, the leading end is unwound from a seed yarn or a package of a winding section. Insert the lower yarn on the take-up side into the spinning nozzle, and then drive the draft device to restart the supply of the sliver, and cut the leading end inserted into the air nozzle into a seed yarn or lower yarn. In addition, a piecing method or the like in which sliver fibers are wound around to restart spinning is known.

[0003]

In a conventional piecing method, a seed thread whose leading end is defibrated or a lower thread unwound from a package of a winding section (hereinafter simply referred to as "lower thread"). After inserting the seed yarn or the lower yarn into the spinning nozzle, the tip of the seed yarn or the lower yarn is defibrated, and then the draft device is driven to drive the sliver. The sliver fiber is wound around the unwound seed yarn or bobbin thread at the end inserted into the spinning nozzle, and splicing is performed. If the defibration process is insufficient and the defibration process is inadequate, sliver entanglement is poor and splicing mistakes occur. A weak spliced portion is formed, and the thread breaks again at this portion There is a problem.

[0004] Further, if the supply timing of the sliver and the take-up timing of the seed yarn or the lower yarn are deviated, there is a problem that a yarn splicing error occurs or the yarn breaks again. For example, the take-up timing of the seed thread or lower thread is
If it is too early, the sliver fiber will not be wound around the leading end of the seed yarn or the lower yarn, and therefore, a splicing error will occur.If the timing of taking the seed yarn or the lower yarn is too late, the sliver fiber will be excessively supplied. Then, the sliver fiber is clogged in the spinning nozzle, and the yarn breakage occurs again.

[0005] Further, since the supplied sliver fiber is wound only around the defibrated tip of the seed yarn or the lower yarn, the piecing is performed, so that the piecing portion is short. Since a yarn break occurs or a yarn spliced portion becomes thick, there is a problem that the yarn is cut by a slab catcher.

An object of the present invention is to solve the problems of the above-described conventional piecing method of a spinning device and to provide a piecing method that can perform piecing quickly and reliably. .

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to provide a drafting device provided with a front roller.
Feed sliver with nozzle and hollow spindle
Spinning device that forms spun yarn through a spinning nozzle
The lower thread on the winding side with the hollow spindle and nozzle.
Through the sliver inlet of the spinning nozzle
From the sliver supply and the above-mentioned spinning nozzle.
Driving and feeding of the lower thread are resumed, and the spinning nozzle
Inside, sliver fiber wrapped around the lower thread
To perform piecing .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments without departing from the spirit of the present invention.

First, a spinning apparatus as an example to which the piecing method of the present invention is applied will be described with reference to FIG. 1 which is a schematic side view of a spinning apparatus.

In FIG. 1, L is a sliver supplied to a draft device D via a sliver guide G. The draft device D includes a back roller d1, a third roller d2, a second roller d3 having an apron, and a front roller d4. The sliver L drafted in the drafting device D is supplied to a spinning nozzle N described later, and is formed into a spun yarn Y by the spinning nozzle N.
After passing through a spun yarn feeding device H including a nip roller h1 and a delivery roller h2 and a slab catcher Z,
It is driven by the friction roller w1 of the winding unit W and wound on a package w3 supported by the cradle arm w2. Note that d5 is a clutch device such as an electromagnetic clutch for stopping or driving the back roller d1 or the third roller d2, and P is a tension applying device described later.

FIG. 2 shows the spinning nozzle N shown in FIG.
FIG. 3 is an enlarged partial cross-sectional view of the nozzle n1.
Air injection holes n5 are formed, and a hollow spindle n3 having a free end disposed in the cylindrical hollow chamber n2 so as to face the inlet of the hollow passage n6 of the hollow spindle n3. A needle-like guide member n7 having a diameter smaller than the diameter of the entrance of the hollow passage n6 is attached to the inner wall n8 of the nozzle n1 on the front roller d4 side. The hollow spindle n3 is rotatably supported by a suitable driving means such as an air turbine or a driving belt (not shown).

[0012] The drafted sliver L sent from the front roller d4 of the drafting device D has an air injection hole n.
Nozzle n1 by the suction airflow near the sliver introduction hole n9 of the nozzle n1 generated by the action of the air jetted from the nozzle n1
Is sucked into the cylindrical hollow chamber n2. Then, the fibers f constituting the sliver L sucked into the cylindrical hollow chamber n2
Is sent along the periphery of the needle-shaped guide member n7,
In the vicinity of the conical tip portion n4 of the hollow spindle n3, the fiber f is swept while being separated from the sliver L by the action of the swirling air flow ejected from the air injection hole n5 and swirling at high speed around the outer periphery of the hollow spindle n3. Temporarily twisted in the direction of the air flow.

At this time, the fibers f separated from the sliver L
Is that the needle-shaped guide member n7 prevents the formation of core fibers, and the hollow spindle n3 is rotated so that it is evenly distributed around the outer periphery of the distal end portion n4 of the hollow spindle n3, so that there is almost no core fiber. Therefore, most of the fibers are twisted and wound into a real twisted spun yarn Y. Further, the false twist twisted by the swirling airflow tends to propagate in the direction of the front roller d4, but the propagation is prevented by the needle-shaped guide member n7, and therefore, the sliver L sent from the front roller d4 is temporarily removed. It is not twisted by twisting. As described above, the false twisted fiber f is sequentially formed into the spun yarn Y, and is sent in the direction of the winding portion W through the hollow passage n6 of the hollow spindle n3. The above-described spun yarn forming apparatus is described in, for example,
No. 1525.

Hereinafter, a piecing method when a yarn breakage occurs in a spinning device having the above-described spinning nozzle N will be described. When a yarn breakage of the spun yarn Y occurs, a clutch device d5 is used as shown in FIG. 3 according to a yarn breakage detection signal of a known yarn breakage detection member (not shown).
To operate the back roller d1 or the third roller d.
2 and the supply of the sliver L is stopped,
The nip roller h1 is separated from the delivery roller h2 to stop the feeding of the spun yarn Y by the spun yarn feeding device H, and further, the cradle arm w2 is rotated to separate the package w3 from the friction roller w1, and the spun yarn Y package w3 Stop winding to

Next, as shown in FIG. 4, the spinning nozzle N is connected to the front roller d4 and the front roller d.
4 and at the same time, the spinning nozzle N is tilted clockwise about the fulcrum n11 of the support arm n10 of the spinning nozzle N. The spinning nozzle N
Such a movement can be appropriately performed by connecting the support arm n10 with an appropriate link mechanism and using a known cylinder device or the like as a drive source.

Next, a known suction mouse is brought into contact with the surface of the package w3 in which the cut spun yarn Y is wound, to suck the cut end of the spun yarn Y, and the sucked cut end is drawn from the suction mouse. As shown in FIG.
The yarn is transferred to the gripping member t1 of the yarn transport device T provided with the gripping member t1 at the tip, and the gripping member t1 gripping the cut end of the spun yarn Y is disposed at the rear of the spinning nozzle N. On the other hand, the suction head a1 of the yarn suction device A is arranged so as to approach or contact the sliver introduction hole n9 of the spinning nozzle N.

The spun yarn Y is rewound from the package w3 in which the cut spun yarn Y is wrapped, that is, the lower yarn on the winding side is rewound, and instead of using the lower yarn for piecing, another yarn is used. The spun yarn unwound from the package, that is, the seed yarn may be used for piecing, and after the piecing is completed, the spun yarn Y and the seed yarn on the package w3 side may be joined by a knotter or the like. Although possible, the following embodiment of the present invention describes a case where the spun yarn Y wound around the package w3 is unwound, that is, the lower yarn is used for piecing.

After arranging the suction head a1 of the yarn suction device A close to or in contact with the sliver introduction hole n9 of the spinning nozzle N, the suction head a1 of the yarn suction device A is set.
And release the gripping of the cut end of the spun yarn Y gripped by the gripping member t1 of the yarn transporting device T, as shown in FIG.
As shown in the figure, the spun yarn Y is passed through the hollow spindle n3 and the nozzle n1 of the spinning nozzle N, and the cut end of the spun yarn Y is suction-held by the suction head a1 of the yarn suction device A, and then the yarn suction is performed. The apparatus A is moved downward, and when the spun yarn Y is pulled out from the sliver introduction hole n9 of the spinning nozzle N by a predetermined amount, the downward movement of the yarn suction apparatus A is stopped.

Next, the suction head a1 of the yarn suction device A
By stopping the suction operation of the suction head a
By cutting the spun yarn Y sucked by the cutting device incorporated in 1, the gripping of the spun yarn Y from the suction head a1 of the yarn suction device A is released, and the released spun yarn Y is released. , As shown in FIG. Then, the spinning nozzle N is moved to FIG.
Return to the spinning position as shown in. In addition, as shown in FIG.
A configuration in which the spun yarn Y is stored in the storage part p2 in a negative pressure state by the suction of air by 1 can be used, or a known tension device such as a tension washer can be used.

Next, the clutch member d5 is operated,
Drive back roller d1 or third roller d2,
The supply of the sliver L is restarted. Immediately before the tip of the sliver L reaches the sliver introduction hole n9 of the spinning nozzle N or at the time when the tip reaches the sliver introduction hole n9, the spinning nozzle N
Is driven to be in a spinnable state. Immediately after the spinning nozzle N is driven and the spinning is enabled, the nip roller h1 is brought into contact with the delivery roller h2, and the feeding of the spun yarn Y by the nip roller h1 and the delivery roller h2 is restarted.

By restarting the feeding of the spun yarn Y by the nip roller h1 and the delivery roller h2, the fiber f of the sliver L supplied to the spinning nozzle N is changed at or immediately after the transfer of the spun yarn Y in the spinning nozzle N is started. The wrapping is performed around the spun yarn Y in the spinning nozzle N that has started the transfer, and the splicing is performed as if the fiber f of the sliver L is a core yarn with the spun yarn Y as a core. And
The fiber f of the sliver L winds around the spun yarn Y unreeled from the tension applying device P one after another.
Until the final end of the spun yarn Y gripped by the above passes through the tip end n4 of the hollow spindle n3, the winding of the fiber f of the sliver L around the spun yarn Y continues,
After the final end of the spun yarn Y held by the tension applying device P passes through the front end n4 of the hollow spindle n3,
The ordinary spinning process of the spun yarn Y using only the fiber f of the sliver L is performed.

In the present invention, unlike the conventional piecing method as described above, in which sliver fibers are attached to the leading end of the defibrated lower thread, the piecing is performed from the tension applying device P. Since the fibers f of the sliver L are successively wound around the spun yarn Y to be spliced, the supply timing of the sliver L or the take-up timing of the spun yarn Y by the spun yarn delivery device H is shifted. However, the final end of the spun yarn Y gripped by the tension applying device P is the tip end n4 of the hollow spindle n3.
Until the yarn passes through, the splicing error is reduced, and the splicing is performed as if the fiber f of the sliver L is a core yarn with the spun yarn Y as a core. Therefore, a strong spliced portion can be formed in which the spliced portion is inconspicuous.

Also, since the fiber f of the sliver L is wound around the spun yarn Y to perform splicing,
Since the spun yarn Y serving as the core does not need to be defibrated, the piecing can be performed without being affected by the degree of the defibrating process as in the conventional piecing method. Of course, also in the present invention, the spun yarn Y gripped by the tension applying device P is untwisted, and the spun yarn Y is turned into a twisted or substantially non-twisted state. The fiber f of the sliver L can be wound and twisted at the same time to perform piecing. By performing such piecing,
A stronger spliced part is obtained.

In the above embodiment, the spinning nozzle N is tilted clockwise. However, the spinning nozzle N can be tilted counterclockwise to move the spinning nozzle N upward. Can be arranged above the spinning nozzle N, and the yarn suction device A can be moved upward. Furthermore,
The present invention is applicable not only to a spinning device having a spinning nozzle in which the needle-shaped guide member n7 is not disposed, but also to a spinning device having a spinning nozzle utilizing various known swirling air flows. Can be.

[0025]

Since the present invention is configured as described above, it has the following effects. ◇

The sliver fiber is wound around the spun yarn inserted into the spinning nozzle and carried out from the sliver introduction hole of the spinning nozzle in the spinning nozzle to perform splicing. Even if the supply timing or the take-up timing of the spun yarn by the spun yarn sending-out device is shifted, the splicing can be performed, so that splicing errors are reduced.

Since the sliver fiber is wound around the spun yarn so as to produce a core yarn with the spun yarn as a core, the splicing is performed, so that the spliced portion is inconspicuous and a strong spliced portion can be formed. it can.

Since the sliver fiber is wound around the spun yarn to perform the splicing, there is no need to open the spun yarn as the core.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a spinning device to which the present invention is applied.

FIG. 2 is an enlarged partial cross-sectional view of a spinning nozzle as an example.

FIG. 3 is a schematic side view of the spinning device shown in FIG. 1 showing a piecing process.

FIG. 4 is a schematic side view of the spinning device showing a piecing process in the same manner.

FIG. 5 is a schematic side view of the spinning device showing a piecing process.

FIG. 6 is a schematic side view of the spinning device showing a piecing process in the same manner.

FIG. 7 is a schematic side view of the spinning device showing a piecing process in the same manner.

FIG. 8 is a schematic side view of the spinning device showing a piecing process.

[Explanation of symbols]

 A: a yarn suction device D: a draft device H: a spun yarn delivery member L: a sliver N: a spinning nozzle P: tension Applicator T ···· Thread conveying member W ···· Winding unit

Claims (1)

(57) [Claims] (1) A roller supplied from a front roller of a draft device.
Sliver having a nozzle and a hollow spindle
In a spinning device that forms a spun yarn through a spinning nozzle,
Pass the lower thread on the winding side through the hollow spindle and nozzle.
The end of the lower thread from the sliver inlet of the spinning nozzle.
After pulling out, supply of sliver and drive of the above spinning nozzle
And restart the feeding of the bobbin thread.
Then, wrap the sliver fiber around the lower thread
A piecing method for a spinning device, wherein piecing is performed .