JPH0620466U - Spinning equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To make a spindle drive device of a pneumatic spinning device suitable for high-speed rotation with a simple structure. [Structure] 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 hollow spindle 6 having a rotary drive unit 17 utilizing the air flow, and a tip directed toward an inlet 6a thereof. It is composed of a guide member 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 previously proposed a pneumatic spinning device for producing a real twist spun yarn, and has already filed another application (Japanese Patent Application No. 3-29904, etc.).

The device has a rotating hollow spindle and a guide member projecting its tip toward the entrance thereof, and jets a swirling airflow toward the entrance of the spindle to twist the fiber bundle exiting the draft device. It is a spinning device. As a drive device for this spindle, one that directly drives the spindle with a belt, one that surrounds the spindle with three rollers to drive it by external bearings, and a drive that incorporates a spindle into the hollow shaft of the rotor of the high-frequency induction motor Things are used.

[0004]

[Problems to be solved by the device]

 The conventional belt-type spindle drive device described above can only increase the rotation speed of the spindle by about 30,000 rpm, and the roller-spindle drive device can increase the rotation speed of the spindle, but the drive motor is required. Yes, the motor must be cooled for high speed rotation, which is expensive. The same can be said for the spindle drive device using the high frequency induction motor as long as the motor is used.

An object of the present invention is to provide a spinning device having a spindle drive device having a simple structure and suitable for high speed rotation.

[0006]

[Means for Solving the Problems] To achieve the above object, a spinning device of the present invention comprises a nozzle block having a nozzle for causing a swirling air flow to act on a fiber bundle exiting a draft device, and a rotation using an air flow. It is composed of a hollow spindle having a drive part and a guide member projecting with its tip facing the inlet.

[0007]

[Work]

 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. From there, it is drawn into the fiber bundle that is being formed into yarn and guided into a rotating spindle. Further, the rear end side of the fiber is inverted 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. .

[0008]

【Example】

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

This spinning device is provided with a nozzle block 2 having a nozzle 3 arranged inside a casing 1 following a draft device, a guide member support body 4 having a guide member 5 located at an inlet portion thereof. The inlet side is composed of a rotary spindle 6 inserted in the casing 1.

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 portion of the nozzle block 2 that covers the vicinity of the spindle inlet 6a is a small-diameter cylindrical hollow chamber 8 that follows the outer shape of the nozzle block 2, and the front thereof is slightly larger than the tip diameter of the spindle 6 by the nozzle block 2. It has a cylindrical shape with a diameter. In the portion following the hollow chamber 8, an annular hollow chamber 9 formed in the lower casing 1a and a tangential air escape hole 10 following it are formed.

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 which 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, after flowing into the air reservoir 11, is jetted 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.

In FIG. 1, the spindle drive unit is supported by the bare ring 15 inside the bearing casing 14 and driven by the air turbine. In the one shown in FIG. 2, the spindle drive unit is inside the bearing casing 14. 3 is supported by an air bearing and is driven by an air turbine. In the structure shown in FIG. 3, it is supported by an air bearing inside the bearing casing 14 and driven by a swirling air flow ejected from the nozzle 3. Is.

The air turbine has a structure common to those shown in FIGS. 1 and 2. As shown in FIG. 4, a cylindrical bush 16 having a compressed air supply hole 16a and an air discharge hole 16b that are tangentially opened in the bearing casing 14 is fitted into the bearing casing 14, and the compressed air is also supplied to the bearing casing 14. A compressed air supply hole 14a or an air discharge hole 14b communicating with the hole 16a or the air discharge hole 16b is provided, while a plurality of jet air flows are received on the outer peripheral surface of the spindle 6 corresponding to the opening of the compressed air supply hole 16a. The semicircular concave portion 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.

The air bearing has a structure common to those shown in FIGS. 2 and 3. A cylindrical bush 17 having an air ejection hole 17b is fitted into the bearing casing 14 following the air reservoir 17a, and the bearing casing 14 is also provided with a compressed air supply hole 14c communicating with the air reservoir 17a. It is a thing. Reference numeral 18 is 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.

Although the drive device dedicated to the spindle 6 is not provided in the structure shown in FIG. 3, the rotation resistance thereof is extremely small due to the adoption of the air bearing. Therefore, if the dimensional accuracy of each member is made to be accurate, High-speed rotation of 60,000 to 80,000 rpm can be achieved by the swirling airflow.

In the spinning system configured as described above, the fiber bundle drafted by the draft device is introduced into the casing 1 from the fiber bundle introduction hole 13 of the guide member support body 4 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 drawn from the periphery of the guide member 5 into the fiber bundle being formed into the yarn and guided into the spindle. The rear end side of the fiber is inverted from the spindle inlet 6a and separated into each fiber. The separated fibers at the rear end are exposed to the whirling airflow ejected from the nozzle 3 and are spirally wound around the fiber bundle that is being formed into the yarn as the yarn travels, resulting in a true twisted spun yarn. Becomes The guide member 5 functions as a so-called pseudo core that blocks the propagation of twists during the yarn forming process or temporarily acts as a substitute for the central fiber bundle, and does not significantly appear in the conventional air-bonded spun yarn. It functions to prevent the formation of twisted core fiber bundles and effectively form the yarn only from the wound fibers.

[0023]

[Effect of device]

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

That is, the amount of wound fiber is extremely large, and it is possible to manufacture a yarn whose appearance and tenacity properties are comparable to those of the ring yarn, and of course, since the airflow is used in the spindle drive part, 100,000 rpm The above high-speed rotation is also possible, and spun yarn with good yarn tightness can be stably manufactured in a state with less yarn breakage. Moreover, the vibration noise accompanying the rotation of the spindle can be reduced, and the rotation torque of the spindle is small, so that even if a yarn break occurs during spinning, the fibers do not get entangled. In addition, compared to general hydrostatic bearings, the load is only small due to its own weight, the structure is simple and inexpensive, and maintenance and replacement are easy.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment of a spinning device of the present invention.

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

FIG. 3 is a sectional view of a spinning device according to a third embodiment of the present invention.

FIG. 4 is a sectional view of an air turbine section used in the spinning device of the present invention.

[Explanation of symbols]

 2 Nozzle block 3 Nozzle 5 Guide member 6 Spindle 6a Spindle inlet

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[Procedure amendment]

[Submission date] May 20, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Scope of utility model registration request

[Correction method] Change

[Correction content]

[Scope of utility model registration request]

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 hollow spindle having a rotary drive section utilizing the air flow, and a guide member projecting its tip toward its inlet. Spinning device consisting of.