JPH072473U - Fluff suppressor - Google Patents

Abstract

(57) [Summary] [Object] To obtain a fluff suppressing device capable of forming a spun yarn having substantially no fluff and capable of constituting a novel spinning device. A pair of rotating discs, each of which has an annular convex portion concentric with the rotating disc, is supported on one surface of the rotating disc so as to face each other so that the convex portions overlap each other, and the facing portion is a nip portion. And

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fluff suppressing device.

[0002]

[Prior art]

 Conventionally, in an air spinning machine, after a sliver supplied from a can is drafted by a draft device composed of three or more draft roller pairs, a series of swirling airflows generated by compressed air injection in opposite directions are generated. False-twisted by passing through the first and second air-spinning nozzles that are arranged in the above, and the bundled spun yarn is in a false-twisted state due to the presence of the wound fiber on the surface layer of the parallel core fiber. Are manufactured. On the surface of such spun yarn, a part of the end of the wound fiber is released to form a large amount of fluff and become a cloudy yarn, which has a considerable influence on the quality of the spun yarn.

[0003]

[Problems to be solved by the device]

 In view of the above-mentioned problems of the prior art, the present invention makes it possible to obtain a spun yarn that is substantially fluff-free (the number of fluffs that does not affect the quality of the spun yarn), and a new spinning device. It is an object of the present invention to provide a fluff suppressing device that can be configured.

[0004]

[Means for Solving the Problems]

 A pair of rotary discs, each of which has an annular convex portion concentric with the rotary disc, is supported on one surface of the rotary disc so as to face each other so that the convex portions overlap each other at two positions. And

[0005]

[Action]

 When the spun yarn is nipped by the convex portions of the pair of rotating discs and sent out, the spun yarn is given a false twisting and rubbing action, whereby fluff on the yarn surface is suppressed from being wrapped around the yarn itself.

When both of the two overlapping portions on the convex portion of the fluff suppressing device are nip portions, the twisting directions are opposite to each other in each of the nip portions. It is possible to impart a false twist at the nip portion and a rubbing action in the direction opposite to the false twist at the downstream nip portion. If the false twisting mechanism in the upstream nip portion is replaced with the second nozzle of the air spinning nozzle and the fluff suppressing device is arranged immediately after the first nozzle, the false twisting in the upstream nip portion of the fluff suppressing device will be performed. The surface layer fiber is wound around the core fiber to be bundled by the swirling airflow of the first nozzle to form a wound fiber and is in a twisted state, and after forming a bundled spun yarn, the spun yarn is downstream of the fluff suppressing device. The fluff of the spun yarn is wrapped around the yarn itself by the false twisting and rubbing action in the opposite direction added at the side nip portion, and a spinning device is constructed to deliver the spun yarn as a fluff-free spun yarn to the downstream side.

[0007]

【Example】

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

FIG. 1 shows a spinning machine 2 equipped with the fluff suppressing device 1 of the present invention. In the figure, the spinning machine 2 is a four-wire drafting device including a back roller pair 4a, a third roller pair 4b, a middle roller pair 4c having an apron belt e mounted thereon, and a front roller pair 4d. The air spinning device 5, the delivery roller 6 in contact with the nip roller 6a 6, the slack tube 7, the yarn clearer 8 for detecting yarn defects, and the winding device 9 arranged in series from the upstream side to the downstream side. A large number of spinning units are arranged side by side in the machine longitudinal direction, and one unit is shown in FIG.

The fluff suppressing device 1 is provided on the downstream side of the delivery roller 6 of the spinning machine 2. The fluff suppressing device 1 will be described below with reference to the drawings.

2 and 3 are a side view and a front sectional view showing a first embodiment of the present invention. In the figure, the fluff suppressing device 1 is constructed by opposing a pair of rotating disks A and B of the same shape.

The rotating disks A and B are provided integrally with the rotating shafts AO and BO at the end portions of the rotating shafts AO and BO, respectively, and have convex edges A1 and B1 in an annular shape along the peripheral portion of one side surface. Are formed in a dish shape, and the rotating disks A and B face each other with the side surfaces provided with the convex edges A1 and B1 partially overlapped with each other. The shaped nip portions T1 and T2 are supported in contact with each other, and are driven and rotated in the directions of arrows a and b in FIG. 1 about the rotation axes AO and BO by a power not shown.

The outer peripheral edges of the convex edges A1 and B1 are chamfered to facilitate the introduction of a yarn described later. It is also advantageous to secure the gripping force by forming the convex edges A1 and B1 with an elastic material such as rubber.

Next, the operation will be described based on examples.

The sliver S supplied from the can 3 in the spinning device 2 shown in FIG. 1 is drafted by the drafting device 4, then false twisted by the air spinning device 5, and sent out from the delivery roller 6 as spun yarn Y. It In this state, the spun yarn Y has many fluffs formed on its surface due to the action of the whirling air current during spinning. The spun yarn Y, which is provided with sufficient straightness by the delivery roller 6 or a guide member provided as necessary, is provided between the pair of two rotating disks A and B in the fluff suppressing device 1 as shown in FIG. It is introduced into the nip portions T1 and T2. At this time, the spun yarn Y is nipped in the nip portions T1 and T2 with a fixed gripping length, and the nip portions will be referred to as nip points n1 and n2 for the sake of convenience.

As shown in FIG. 4, at the nip point n1 on the upstream side in the traveling direction of the spun yarn Y in the fluff suppressing device 1, friction in the tangential direction due to rotation of the rotating disk A in the direction of arrow a (clockwise). The force Fa1 and the frictional force Fb1 in the tangential direction due to the rotation of the rotating disk B in the direction of arrow b (counterclockwise) act on the spun yarn Y.

The frictional force Fa1 and the frictional force Fb1 cause the spun yarn Y to be fed in the yarn traveling direction and generate a torque in the direction of the arrow t1 which is the counterclockwise direction in FIG. 3, and the torque causes the spun yarn Y to move. False twist is imparted. In the illustrated example, the false twist is applied at the nip point n1 in the same Z direction as the original twist direction of the spun yarn Y. The false twist imparted to the spun yarn Y by the frictional forces F a1 and Fb1 and the fluff on the surface layer of the spun yarn Y are suppressed from being wrapped around the yarn itself by the rubbing action.

Further, at the nip point n2 on the downstream side in the running direction of the spun yarn Y in the fluff suppressing device 1, the tangential frictional force Fa2 due to the rotation of the rotating disk A in the direction of the arrow and the rotating disk B The tangential frictional force Fb2 generated by the rotation in the direction of the arrow b acts on the spun yarn Y, which causes the spun yarn Y to be fed in the yarn running direction and opposite to the torque at the upstream nip point n1. A torque is generated in the direction, and the false twist is applied to the spun yarn Y 1 in the direction opposite to the false twist at the nip point n1. By the false twist and the rubbing action during friction, fluff is further suppressed, and the spun yarn Y having substantially no fluff is delivered to the downstream side and wound up by the winding device 9 shown in FIG.

In the fluff suppressing device 1 described above, it is advantageous to set the nip pressures at the nip points n1 and n2, that is, the contact pressures of the convex edges A1 and B1 of the rotating disks A and B to be equal. It is also possible to make the nip pressures at the nip points n1 and n2 different from each other by a means such as providing a small deflection angle on either or both of the rotation axes AO and BO of the respective rotary disks A and B. In this case, for example, the nip pressure at the upstream nip point n1 is set to be higher than the nip pressure at the downstream nip point n2, and the spun yarn Y is mainly false twisted at the upstream nip point n1. The function of each nip point n1, n2 may be differentiated by winding the fluff of the spun yarn Y around the yarn itself and additionally rubbing the fluff at the downstream nip point n2 to suppress the fluff.

FIG. 5 shows another embodiment in which the above-mentioned configuration is further developed.

In the figure, the fluff suppressing device 1 is arranged immediately after the first nozzle nozzle N 1 of the air spinning device 5 ′, and the nip point n 1 on the upstream side of the fluff suppressing device 1 is used as a second nozzle of the air spinning device 5. The fluff suppressing device 1 and the first nozzle N1 constitute a spinning device 5'to simplify the structure of the spinning machine 2.

In the spinning device 5 ′, the sliver S drafted from the front roller 4 d and sent out is converged by the false twist which is propagated retroactively from the upstream nip point n 1 of the fluff suppressing device 1, and further, The bundled spun yarn Y is formed by winding the fibers of the surface layer portion forming the sliver S around the core fiber by the swirling airflow in the direction opposite to the false twist generated by the compressed air injection in the one nozzle N1. At this time, many fluffs are formed on the surface of the spun yarn Y by the action of the whirling air current during spinning.

After passing through the upstream nip point n1 of the fluff suppressing device 1, it passes through the downstream nip point n2 in the process of untwisting. At this time, the spun yarn Y is given a false twisting and rubbing action in the same direction as the untwisting direction, whereby the above-mentioned fluff on the surface of the spun yarn Y is wrapped around the yarn itself and is suppressed, and is substantially The fluff-free spun yarn Y is delivered from the delivery roller 6.

It should be noted that the fluff suppressing device 1 of the present invention can be applied to various textile machines such as an air spinning machine, such as spinning machines and winders, which are effective in suppressing fluff.

Further, in the above-described embodiment, the yarn is nipped at the two nip points of the fluff suppressing device, but the yarn may be nipped at only one of the nip points to suppress the fluff. I do not care.

[0025]

[Effect of device]

 As described above, the fluff suppressing device of the present invention comprises a pair of rotating discs each having an annular convex portion concentric with the rotating disc on one surface of the rotating disc so that the convex portions are overlapped at two positions. The fluff suppressing device is provided immediately after the first nozzle of the air-spinning device, because a spun yarn having substantially no fluff can be obtained by supporting the shaft with the nip portion. It is possible to manufacture a spun yarn having substantially no fluff, and it is possible to simplify the structure of the spinning device.

[Brief description of drawings]

FIG. 1 is a perspective view showing a spinning machine equipped with a fluff suppressing device according to a first embodiment of the present invention.

FIG. 2 is a side view showing a first embodiment of the present invention.

FIG. 3 is a sectional view taken along the line XX-X ′ of FIG.

FIG. 4 is an enlarged view of a main part of FIG.

FIG. 5 is a side sectional view showing a second embodiment of the present invention.

[Explanation of symbols]

 1 Fluff Suppression Device 2 Spinning Machine A, B Rotating Disk A1, B1 Convex Edge n1, n2 Nip Point 5'Spinning Device N1 First Nozzle Y Spun Yarn

Claims (1)

[Scope of utility model registration request] 1. A pair of rotating disks, each of which has an annular convex portion concentric with the rotating disk on one surface of the rotating disk, are axially supported so as to face each other so that the convex portions overlap each other at two positions. A fluff suppressing device characterized by being a nip portion.