JPH0679753U - Spinning equipment - Google Patents

Abstract

(57) [Summary] [Purpose] While maintaining various characteristics such as the strength, number of twists, and unevenness of the spun yarn in a spinning device in which fibers are supplied from around a guide member and twisted by a swirling airflow. In addition, it is possible to easily thread the upper thread without causing thread breakage or reducing the thread elongation. A nozzle block (2) having a nozzle (3) for causing a swirling air flow to act on a fiber bundle exiting a draft device, a rotary spindle (6) having a curved fiber bundle passage (7), and a guide member protruding toward its inlet (6a). It consists of 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus for producing a spun yarn by twisting an untwisted short fiber bundle drafted by a drafting device by causing a swirling air flow to twist the bundle.

[0002]

[Prior art]

 The present applicant has proposed and applied for a spinning device shown in FIG. 4 (Japanese Patent Laid-Open No. 4-24221). The spinning device includes a nozzle block 4 having a nozzle 3 that causes a swirling air flow to act on a fiber bundle that has exited the draft device, a spindle 6 that accommodates a sphere 19 in a fiber bundle passage 7, and a tip that faces the inlet 6a. And a guide member 5 projecting upwardly, and a non-twisted short fiber bundle is twisted by a swirling air current to produce a spun yarn.

[0003]

[Problems to be solved by the device]

 The above spinning device is similar in appearance and yarn characteristics to a ring yarn, and in addition, by accommodating the spheres 19 in the fiber bundle passage 7 of the spindle 6, various characteristics such as yarn strength, twist number, and yarn unevenness are improved. However, conversely, by accommodating the spheres 19 in the fiber bundle passage 7 of the spindle 6, it is very difficult to thread the yarn, the elongation of the yarn is reduced, and There is a defect that thread breakage occurs when foreign matter such as leaf dregs and seed dregs that pass through passes the position of the sphere 19.

Incidentally, in this type of spinning device, the smaller the inner diameter of the fiber bundle passage 7 of the spindle 6, the greater the yarn strength and the less the yarn unevenness. However, if the inner diameter of the fiber bundle passage 7 is small, thread breakage will occur when passing foreign substances such as leaf dregs and seed dregs. The inner diameter cannot be smaller than 0.9 mm.

This invention maintains various characteristics such as strength, number of twists, and yarn unevenness of a spun yarn in a spinning device in which fibers are supplied from around a guide member and twisted by a swirling airflow, The aim is to facilitate threading without causing thread breakage or decreasing the thread elongation.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a spinning device of the present invention is provided with a nozzle block having a nozzle for causing a swirling air flow to act on a fiber bundle exiting a draft device, a rotary spindle having a curved fiber bundle passage, and an inlet thereof. It is composed of a guide member that projects toward the tip.

[0007]

[Action]

 In the spinning device configured as described above, the fiber bundle exiting the draft device is drawn into the device by the action of the air flow ejected from the nozzle, and the front ends of all the fibers of the fiber bundle are around the guide member. Then, the fiber bundle is drawn into the yarn and guided into the spindle. The rear end side of the fiber is reversed from the spindle inlet and separated into each fiber. The separated fibers at the rear end are exposed to the swirling airflow ejected from the nozzle, and as the yarn travels, they are spirally wrapped around the fiber bundle that is being formed into yarn and become spun yarn with a real twist. . At that time, the fiber bundle being formed into the yarn is bent by the fiber bundle passage of the spindle to be in a gripping state, receives the rotational force without slipping, is squeezed, and the tension increases.

[0008]

【Example】

 The spinning device of the present invention will be described with reference to FIGS. 1 to 3.

The spinning device S is provided between the front roller Rf and the delivery roller Rd of the draft device D, and is a nozzle having a nozzle 3 arranged substantially inside the casing 1 following the draft device. It comprises a block 2, a guide member support 4 located at the entrance thereof and having a guide member 5, and a rotary spindle 6 inserted into the casing 1 on the entrance side.

The draft device D employs, for example, a front roller Rf, a second roller R2 having an apron, a third roller R3, and a back roller Rb.

A fiber bundle passage 7 is formed through the center of the spindle 6, the outer diameter of the inlet 6a is sufficiently small, and the portion following the inlet 6a is a conical portion whose outer diameter increases toward the downstream side. 6b. The spindle 6 is composed of a cylindrical body 61 having a large inner diameter and a head portion 62 having a bent portion 62a inside.

If the bendable portion 62a of the fiber bundle passage 7 in the head portion 62 can be processed, it is ideal to provide it at two places as shown in FIG. 3, but as shown in FIG. Is good. In that case, the inner diameter of the fiber bundle passage 7 is 0.9 mm, the angle of inclination of the bent portion 62a with respect to the spindle axis is 30 °, and the cutting angle of the outlet portion is 30 °, so that the fiber bundle in the process of being formed into a yarn is As shown by the dotted line in Fig. 2, it seems that the fiber can pass straight through, but the fiber bundle is bent at the exit by the thickness of the fiber bundle.

When the spindle 6 configured as described above rotates, the fiber bundle in the process of being formed into a yarn is bent and held, so that the fiber bundle does not slip and the spinning force from the spindle 6 does not occur. As it rotates by receiving the force, it is squeezed at the outlet and the tension increases. When the fiber bundle rotates without slipping, the ballooning is stabilized, the wrapping action of the fiber described later is promoted, the yarn strength is increased together with the increase in tension, and the number of twists is increased. Further, when the fiber bundle is squeezed, yarn unevenness is reduced.

A portion of the nozzle block 2 that covers the vicinity of the spindle inlet 6 a is a hollow cylindrical chamber 8 having a small diameter along its outer shape, and its upstream side is slightly smaller than the tip diameter of the spindle 6 by the nozzle block 2. It has a large-diameter cylindrical shape. An annular hollow chamber 9 formed in the lower casing 1a and a tangential air escape hole 10 following the hollow chamber 9 are formed in a portion following the hollow chamber 8.

Inside the upper casing 1 b, a hollow air reservoir 11 is formed between the upper casing 1 b and the nozzle block 2. The nozzle block 2 is formed with four air injection nozzles 3 which communicate with the air reservoir 11 and face downstream slightly away from the inlet 6a of the spindle 6 and which are tangential to the hollow chamber 8. A hose (not shown) is connected to the air reservoir 11 through a hole 12. The direction of the nozzle 3 is set to be the same as the rotation direction of the spindle 6.

The compressed air supplied from the hose flows into the air reservoir 11 and then is ejected from the nozzle 3 into the hollow space 8 to generate a high-speed swirling airflow in the vicinity of the spindle inlet 6a. After swirling inside the hollow chamber 8, this air flow diffuses outward while swirling gently inside the hollow chamber 9, is guided to the escape hole 10 and is discharged. At the same time, this air flow generates a suction air flow that flows from the nip point of the front roller into the hollow portion of the casing 1.

The guide member support 4 has a cap shape having a fiber bundle introduction hole 13 in an upper portion deviated from the center, and a pin-shaped guide member 5 is fixed to the center of the upper portion.

The guide member 5 projects from the center of the upper portion of the guide member support 4 and has a free end, which faces the inlet 6 a of the spindle 6.

The spindle drive section is supported inside the bearing casing 14 by an air bearing and driven by an air turbine.

In the air bearing, a cylindrical bush 17 having an air ejection hole 17b is fitted in the bearing casing 14 following the air reservoir 17a, and the bearing casing 14 also has a compressed air supply hole 14c communicating with the air reservoir 17a. Is provided. Reference numeral 18 denotes a cap of the bearing casing 14.

In this air bearing, when compressed air is supplied from a hose (not shown) connected to the compressed air supply hole 14c, the compressed air passes through the air reservoir 17a and the air ejection hole 17b, and the spindle 6 and the bush. The spindle 6 is discharged through a slight gap with the bush 17 and comes into a non-contact state with the bush 17.

In the air turbine, a cylindrical bush 16 having a compressed air supply hole 16a and an air discharge hole 16b opening in the tangential direction is fitted in the bearing casing 14, and the bearing casing 14 also has the compressed air supply hole 16a or the compressed air supply hole 16a. A compressed air supply hole 14a or an air discharge hole 14b communicating with the air discharge hole 16b is provided, while a plurality of halves for receiving jet air flows on the outer peripheral surface of the spindle 6 corresponding to the opening of the compressed air supply hole 16a. The circular recess 6c is formed.

In this air turbine, when compressed air is supplied from a hose (not shown) connected to the compressed air supply hole 14a, the compressed air passes through the compressed air supply hole 16a and hits the recess 6c of the spindle 6 to Rotate 6. The airflow that rotates the spindle 6 is discharged through the air discharge holes 16b and 14b.

In the spinning device configured as described above, the fiber bundle exiting the draft device is drawn into the device by the action of the air flow ejected from the nozzle 3, and the front ends of all the fibers of the fiber bundle are From around the guide member 5, the fiber bundle being formed into a yarn is drawn and guided into the rotating spindle 6. On the rear end side of the fibers, the axial component force of the air flow ejected from the nozzle 3 acts to reverse the fibers from the spindle inlet 6a and separate the fibers. The separated fibers at the rear end are exposed to the swirling airflow ejected from the nozzle 3, and are wound in a spiral around the fiber bundle that is being formed in the yarn as the yarn travels, resulting in a true twisted spinning. It becomes the thread Y. At that time, the fiber bundle being formed into the yarn is bent by the bent fiber bundle passage 7 of the rotating spindle 6 to be in a gripping state, and is rotated by receiving the rotational force from the spindle 6 without slipping and being squeezed. Also, the tension increases.

[0025]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, it has the following effects.

That is, it is possible to produce a yarn having an extremely large amount of wound fiber and having properties such as appearance, tenacity, number of twists, and yarn unevenness that are comparable to those of a ring yarn, and of course, yarn breakage occurs, Not only does the elongation of the thread not decrease, but threading can be performed easily.

[Brief description of drawings]

FIG. 1 is a side view showing the relationship between a spinning device, a draft device and a delivery roller of the present invention.

FIG. 2 is a vertical sectional view of the spinning device of the present invention.

FIG. 3 is a longitudinal sectional view of another spindle in the spinning device of the present invention.

FIG. 4 is a vertical sectional view of a conventional spinning device.

[Explanation of symbols]

 2 nozzle block 3 nozzle 5 guide member 6 spindle 6a spindle inlet 62 spindle head 7 spindle fiber bundle passage

Claims (1)

[Scope of utility model registration request] 1. A nozzle block having a nozzle for causing a swirling air flow to act on a fiber bundle exiting a draft device, a rotary spindle having a bent fiber bundle passage, and a guide member projecting its tip toward its inlet. Spinning equipment.