JPH0689487B2 - Spinning ring for spinning - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a spinning ring for spinning, and particularly to improvement of a brake mechanism thereof.

[Conventional technology and its problems]

Conventionally, a spinning rotary ring having a ring rotating body which is rotatably supported by a holder via a bearing portion, and the ring rotating body is configured to rotate by the rotational force of a traveler is disclosed in Japanese Patent Publication No. 54-15934. JP-A-58-156
It is known from Japanese Patent No. 037.

In this conventional rotating ring, the ring rotating body descends due to the rapid decrease in the rotation of the spindle when the machine stand is stopped, and at the same time, the dust cover for dust protection contacts the holder to stop the rotation of the ring rotating body. It has a function (Japanese Examined Patent Publication No. 54-15934), or a soft elastic ring body having an L-shaped cross section is integrated with the lower end of the ring rotating body, and the peripheral edge of the tip thereof is used as a brake shoe. During rotation, the brake shoe is brought into contact with the fixed holder by using centrifugal force, and the friction of the brake shoe brakes the ring rotor to suppress the ring rotor from moving at the same speed as the traveler ( JP-A-58-156037).

However, in the former case, the tip of the dust cover becomes horizontal when the ring rotating body rotates at a high speed of 6000 to 7,000 RPM or more due to high torque (high PV value) due to thick count spinning and high speed spinning. When it is opened and completely separated from the upper end of the holder, and the bearing becomes an air bearing, the frictional resistance approaches zero, and the ring rotating body is accelerated by the torque of the traveler and draws a J curve in an extremely short time. Rotate up to the same speed.

Thus, even if the spindle stops due to the stop of the machine base, the tip of the dust cover does not immediately contact the upper edge of the holder downwardly, and the ring rotating body performs inertial rotation for a while due to the moment of inertia. There was a problem that snare was generated due to the returning phenomenon, and this snare causes thread breakage at restart. That is, the braking action by the dust cover is a deactivating brake for stopping the ring that suppresses the inertial rotation of the ring after the machine base is switched off, and the friction pressure is so small that it is not intended to suppress the speeding up of the ring.

In order to prevent this, it takes a lot of time to gradually reduce the rotation of the spindle, reduce the spinning tension and the torque of the traveler, and wait for the rotation speed of the ring rotor to decrease before stopping the machine base. There was inconvenience.

In addition, when the rotational speed of the ring rotor increases in proportion to the spindle rotation during high-speed spinning and becomes the same speed as the traveler, the spinning tension control action unique to the depolarizing rotary ring is achieved by absorbing and converting spinning tension fluctuations into rotational torque. Lost,
Due to its inertia, it becomes impossible to absorb the fluctuation in spinning tension, and the spinning repeats severe fluctuations in tension as the winding speed changes.Therefore, depending on the type of fiber, fluffing, squeeze nep, and other deterioration in yarn quality may occur. there were.

For this reason, the ring rotating body during high-speed spinning is kept within a certain limit, and the bearing portion is made into a non-contact air bearing, so that the ring rotating body draws a J curve and becomes the same speed as the traveler, which causes the above-mentioned adverse effects. In order to prevent
A soft elastic ring plate (brake shoe) having a substantially L-shaped cross section and opened downward is integrated with the lower end of the ring rotating body, and when the ring rotating body rotates at a high speed, a centrifugal force applied to the ring plate makes the tip peripheral edge portion horizontal. The ring holder is lifted up and brought into contact with the lower end surface of the fixed holder, and the frictional pressure pulls down the ring rotor to prevent air bearing, and the frictional friction between the upper surface of the peripheral edge of the brake shoe and the lower end surface of the holder causes high speed rotation of the ring rotor. This is an improvement proposal to prevent the phenomenon of speeding up with the traveler due to the optimization.

However, this method is a great improvement in terms of active braking that controls the ring rotor during high-speed spinning, compared to the passive braking action that prevents overrun of the ring rotor when the former is stopped. During high-speed ring rotation due to high torque, strong frictional force due to centrifugal force is applied, which causes problems such as melting and wear due to frictional heat generation in the brake shoe, and the brake shoe must be replaced after a certain period of use. There was a maintenance problem that it did not happen.

In view of the above-mentioned problems, the present invention prevents excessive high-speed rotation that occurs due to friction resistance approaching zero due to the bearing portion of the ring rotating body becoming an air bearing, and does not cause wear or friction heat generation. The purpose is to provide a spinning ring for spinning.

Another object of the present invention is to reduce the energy loss by generating a rake force only when the ring rotating body rotates at a high speed.

[Means for Solving the Problems]

In order to solve the above problems, a ring according to the present invention is a spinning rotary ring including a holder and a ring rotating body rotatably supported by the holder via a bearing mechanism. The lower end of the body is provided with a brake shoe made of an elastic body that is annular and has an inclined portion that opens downward in the free state. Either the inclined portion of the brake shoe or the lower end of the holder is provided. An annular permanent magnet having magnetic poles arranged in the circumferential direction is provided on one side, and the other side of the inclined portion of the bent brake shoe or the lower end portion of the holder is formed of a conductive material at a position facing the permanent magnet. A derivative is provided.

In addition, the inclined portion of the brake shoe in a state where the permanent magnet or the guide is engaged with each other so that the relative movement in the circumferential direction is not possible and the relative movement in the radial direction is possible with respect to the inclined portion of the brake shoe. It is placed on top.

[Action]

Due to the rotation of the ring rotating body, an eddy current flows in the inductor provided at a position facing the permanent magnet, and thereby torque is generated between the ring rotating body and the holder.

This torque acts as a braking force for the ring rotating body, prevents the ring rotating body from being excessively speeded up, and prevents the bearing portion from becoming an air bearing.

Further, the brake shoe is lifted up by the centrifugal force caused by the rotation of the ring rotating body, whereby the permanent magnet and the dielectric material approach each other.

Therefore, in the case where the brake shoe is provided, when the rotation of the ring rotating body is low, almost no braking force acts on the ring rotating body, and the braking force is effective only when the rotation speed becomes high. Act on.

Further, when the permanent magnet or the derivative is an annular body and is placed on the inclined portion of the brake shoe, the annular body moves upward due to the lifting of the brake shoe, whereby the permanent magnet and the derivative. Approaches and.

〔Example〕

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

In FIG. 1, a ring rotating body 1 comprises a flange rotor 2 having a ring flange portion 2a on which a traveler 21 slides and rotates, and a nonmagnetic conductive material such as an aluminum alloy, a copper alloy, stainless steel, or a carbon material. The lower rotor 3 is fitted.

A fitting groove 6 is formed on the inner peripheral surface of the flange rotor 2, and an annular projection 3a formed on the outer circumference of the upper end portion of the lower rotor 3 is fitted into the fitting groove 6, whereby the flange rotor 2 and The lower rotor 3 is integrated. The upper end of the lower rotor 3 is provided with radial dividing grooves 3b at a plurality of circumferential positions to facilitate the fitting of the annular projection 3a into the fitting groove 6.

After the holder 7 is fitted into the mounting hole 23a of the ring rail 23, the stop ring 24 is fitted and fixed in the mounting circumferential groove 7a.

In addition, 12 is a dust cover, and 22 is ballooning of spun yarn which is being wound from a snell wire to a tube yarn (not shown).

On the outer peripheral surface of the ring rotating body 1 and the inner peripheral surface of the holder 7,
V-shaped V-shaped grooves 10 and 11 facing each other are formed,
A slide ring 8 is loosely fitted in these V grooves 10 and 11.

The slide ring 8 is made of a sliding material having a low friction coefficient, abrasion resistance and conductivity, such as carbon fiber-containing tetrafluoride resin,
Alternatively, a flexible annular body made of engineering plastic such as polyamide-imide and having a rhombic cross-section, and the outer peripheral slope 9a and the inner peripheral slope 9b each have an inclination angle of about 45 degrees with respect to the axis. Is. There is a minute gap between the slide ring 8 and each slope of the V-shaped grooves 10 and 11, whereby the slide ring 8 can rotate relative to both the ring rotating body 1 and the holder 7. However, the bearing rail groove G is formed here.

That is, the ring rotating body 1 is rotatably supported by the holder 7 via the bearing mechanism G including the V grooves 10 and 11 and the slide ring 8.

An annular permanent magnet 5 is fitted on the inner peripheral surface of the lower end of the holder 7. The permanent magnet 5 is an anisotropic magnet made of metal, ferrite (oxide ceramic), rare earth, plastic, or the like, and has an inner peripheral surface of, for example, 8 magnets.
It has poles of 12 poles, 12 poles, 16 poles, etc. with radial orientation and multipole anisotropic magnetization (see FIG. 5a).

The portion of the lower rotor 3 that faces the inner peripheral surface of the permanent magnet 5 is the inductor 4, and the gap S between them is
It can be appropriately set according to the ring rotating torque that differs depending on the size of each purpose of use of the ring and the spinning tension corresponding to the yarn count, or in relation to the strength and weakness of the magnet and the number of magnetic poles.

Next, the operation of the spinning rotary ring configured as described above will be described.

When the ring rotator 1 is stopped or the rotation speed is low, the upward lifting vector of the spinning tension is smaller than the gravity of the ring rotator 1, so that the ring rotator 1 passes through the slide ring 8 to form the V groove. It is supported on the lower slope of 11. When the tension of the spun yarn 22 increases and the ring rotating body 1 rotates at high speed and the lifting force increases upward, the ring rotating body 1 is lifted and the slide ring 8
It is pressed against the upper slope of the V-shaped groove 11 through and slides and rotates.

In any of these cases, the ring rotating body 1 is indirectly contacted and supported by the holder 7 via the slide ring 8, and no unnecessary play is generated, and the bearing mechanism G is prevented from becoming an air bearing. At the same time, the centripetal force due to the tapered surface having an inclination angle with respect to the axis acts, so that the ring rotating body 1 does not cause runout or horizontal wavy rotation, and performs stable rotation.

By the rotation of the ring rotating body 1, the inductor 4 is rotationally moved in the magnetic field of the permanent magnet 5 fixed to the holder 7 in the same direction as the traveler, so that an eddy current due to electromagnetic induction flows in the inductor 4. The direction of the electromagnetic force between the eddy current and the magnetic flux is opposite to the direction of rotation of the ring rotating body 1 that rotates integrally with the dielectric 4, so that a braking force that brakes the rotation of the ring rotating body 1 acts. . This braking force is
Magnetic field strength of permanent magnet 5, number of magnetic poles, conductivity of dielectric 4,
Although it depends on the size of the gap S between the conductor 4 and the permanent magnet 5, it is substantially proportional to the rotation speed of the ring rotating body 1 until the saturation state is reached.

Due to this braking force, the ring rotating body 1 is a traveler.
It is suppressed that the speed is the same as that of 21, and excessive speed is prevented.

Although the conductor 4 is formed integrally with the lower rotor 3 in the above-described embodiments, the conductor 4 may be formed separately from the lower rotor 3 and may be integrated by fitting the lower rotor 3 into the lower rotor 3. .

In the above-mentioned embodiment, the permanent magnet 5 is provided on the outer side in the radial direction of the dielectric 4, but the permanent magnet 5 is fitted on the outer circumference of the lower rotor 3 and the dielectric 4 is fitted on the inner circumference of the holder 7. You may oppose each other. In addition, a plurality of permanent magnets 5
Alternatively, if the conductors 4 are arranged coaxially in the radial direction,
The braking force increases.

FIG. 2 is a front sectional view showing another embodiment, and the same parts as those in the embodiment of FIG. 1 are designated by the same reference numerals.

In FIG. 2, a brake shoe 14 made of soft resin or synthetic rubber is fitted on the inner peripheral surface of the lower rotor 3,
It is sandwiched and fixed by a pressing ring 15 fitted on the inner peripheral surface thereof. The brake shoe 14 has a vertical portion 14a and an inclined portion 14b, and has a V-shaped cross section, and the vertical portion 14a has a ring shape continuous in the circumferential direction.

The inclined portion 14b has a shape that opens downward in a cone shape as shown in the drawing, is an elastic body that is continuous in the circumferential direction and can be horizontally extended by centrifugal force, or is easily deformed by centrifugal force. As described above, the slits in the radial direction are provided at a plurality of positions in the circumferential direction to divide the slit.

On the upper surface of the inclined portion 14b, a plurality of dielectrics 16 made of an aluminum alloy or the like are integrally formed by the insert method, caulking,
It is integrated with the brake shoe 14 by an adhesive agent or a bolt. When the inclined portion 14b is continuous in the circumferential direction, a required number of the dielectrics 16 are provided at equal intervals on the upper surface of the inclined portion 14b, and when the inclined portion 14b is divided, it is divided. The same number is provided on each of the inclined portions 14b.

An annular permanent magnet 17 having a magnetic pole of axially oriented multi-pole anisotropic magnetization is fitted in the holder 7 (see FIG. 5b).

When the ring rotating body 1a rotates, the brake shoe 14 receives an outward force due to the centrifugal force, and the inclined portion 14b uses the "C" -shaped inflection point fitted in the lower rotor 3 as a fulcrum to support the centrifugal force component. Is lifted up by and moves from the state shown by the solid line to the state shown by the chain line. As a result, the dielectric 16 approaches the permanent magnet 17, the brake shoe 14 is leveled at its limit, and when the dielectric 16 comes closest to the permanent magnet 17,
The gap S with 16 is the smallest. Therefore, the inductor 16 approaches the permanent magnet 17 together with the brake shoe 14 and cuts the magnetic flux in accordance with the rotation speed of the ring rotor 1a, so that an eddy current corresponding to the degree of approach and the rotation speed flows. The electromagnetic force between the eddy current and the magnetic flux causes the braking force to act on the inductor 16, that is, the ring rotating body 1a.

When the rotation speed of the ring rotor 1a is low, the gap between the inductor 16 and the permanent magnet 17 is large, so the magnetic force is almost inversely proportional to the square of the distance and is hardly affected by the magnetic flux, and the ring rotor 1a is Almost no braking force acts, but when the ring rotating body 1a becomes faster, the gap becomes smaller and the braking force acts. This braking force becomes maximum when the brake shoe 14 becomes horizontal as described above.

Therefore, in this embodiment, unnecessary braking force is not generated when the ring rotating body 1a is at low speed, and energy loss is reduced. Further, since it is non-contact even when the braking force is generated, it has no wear and has a long life.

In the above-described embodiment, the brake shoe 14 may be a permanent magnet made of soft synthetic resin or rubber, and the derivative may be fitted in the holder 7.

FIG. 3 is a front sectional view showing another embodiment, and the same parts as those of the embodiment of FIGS. 1 and 2 are designated by the same reference numerals.

In FIG. 3, a female screw 31a is formed on the inner peripheral surface of the lower end of the flange rotor 2, and a male screw 31b formed on the outer periphery of the upper end of the lower rotor 3 is screwed to this female screw 31a to an appropriate position. The flange rotor 2
And the lower rotor 3 are integrated. Reference numeral 32 is a notch groove provided in the lower end surface of the lower rotor 3, and 33 is a disc spring for preventing loosening.

When assembling this ring rotating body 1b, female screw 31
After applying a fixing agent (eg Sealock Mech or Loctite) to the a and male screw 31b to prevent them from loosening, insert the slide ring 34 and rotate the lower rotor 3 with an appropriate tool using the cut groove 32. Then, an appropriate gap (for example, about 0.1 plus or minus 0.05 mm) is provided between the slide ring 34 and the concave groove 10a formed by the lower end surface of the flange rotor 2 and the step end surface of the lower rotor 3. Adjust it.

In this way, since the flange rotor 2 and the lower rotor 3 are integrated by screw connection, the gap between the concave groove 10a and the outer diameter up and down direction of the slide ring 34 is set to the ring rotor.
It can be adjusted to the optimum state according to the rotational friction resistance of 1b.

The slide ring 34 has a pentagonal cross section,
It is loosely fitted in a V groove 11 formed in advance on the inner peripheral surface of the holder 7.

Thus, the bearing mechanism G1 is configured here, and the ring rotating body 1b is rotatably supported by the holder 7 via the bearing mechanism G1.

Referring also to FIG. 4, on the inner peripheral surface below the lower rotor 3, a brake shoe 35 including a vertical portion 35a and an inclined portion 35b.
Is inserted into the vertical portion 35a, and the press ring 1 is inserted into the inner peripheral surface of the vertical portion 35a.
It is sandwiched and fixed by 5. On the inclined portion 35b of the brake shoe 35, engaging projections 36, 36 ... Are formed at four locations in the circumferential direction.

37 is a derivative made of a non-magnetic material such as aluminum alloy, copper alloy, stainless steel, carbon, etc.
The brake shoe 35 is configured as an annular body independent of the brake shoe 35, and is placed on the inclined portion 35b.

There are four engaging grooves that are released in the radial direction at four locations in the circumferential direction of the dielectric 37.
38, 38 ... Are formed, and the engagement groove 38 fits into the above-mentioned engagement protrusion 36 so that relative movement with the inclined portion 35b in the circumferential direction is impossible and relative movement in the radial direction is possible. Are engaged with each other. The engagement protrusion 36 and the engagement groove 38 may be provided at three or five or more locations.

Therefore, when the ring rotator 1b rotates, the inclined portion 35b is lifted upward due to the centrifugal force thereof, whereby the derivative 37 moves upward as shown by the chain line and approaches the permanent magnet 17. An eddy current flows through the inductor 37 according to the degree of approach and the rotation speed, and a braking force acts on the ring rotating body 1b.

In this embodiment, if the angle of the inclined portion 35b with respect to the axis in the free state is 45 degrees and the minimum value of the gap S between the permanent magnet 17 and the dielectric 37 is set to 0.5 mm, for example, The maximum magnetic force difference is about 19 times. Therefore, a stronger braking force is generated as the ring rotating body 1b rotates at a higher speed, and conversely, a braking force is hardly generated at a low speed rotation that should not hinder the rotation of the ring rotating body 1b.

According to the ring rotator 1b shown in FIG. 3, the difficulty in the ring rotator 1a shown in FIG. 2, that is, the derivative 16 divided when the ring rotator 1a rotates may catch dust dust. , It is dangerous to touch your hand while rotating at high speed, and so on.

In the above-mentioned embodiment, the permanent magnets 5 and 17 are formed separately from the holder 7, and they are integrated by being fitted into the holder 7. However, the holder 7 is made of a magnetic material and the permanent magnets 5 and 17 are formed. The permanent magnet may be integrally formed by magnetizing the portion.

In the above-described embodiment, the inductor 37 is formed in the annular body and placed on the inclined portion 35b, but the permanent magnet is formed in the annular body and placed on the inclined portion 35b, and the inductor 7 is placed on the holder 7. You may fit in the lower end part of.

In the above-described embodiment, in the ring rotating body 1, 1a shown in FIGS. 1 and 2, the flange rotor 2 and the lower rotor 3 are integrated by the fitting groove 6 and the annular protrusion 3a. Similar to the ring rotating body 1b, the female thread and the male thread may be screwed together. With this arrangement, when assembling the spinning ring, the gap between the V groove 10 and the slide ring 8 is properly uniformed. Can be fine-tuned.

In the above-described embodiment, the bearing mechanism G1 of the spinning ring shown in FIG. 3 may be replaced with the bearing mechanism G shown in FIG. In addition, bearing mechanisms other than these may be used.

〔The invention's effect〕

According to the invention of claim 1, a braking force is generated by the rotation of the ring rotating body, and the braking force increases in accordance with the rotation speed of the ring rotating body, so that the ring rotating body is prevented from rotating at an excessively high speed. As a result, it is possible to suppress the rotation of the ring rotor within a range where the spinning tension control action, which is the greatest feature of the depolarizing rotary ring, can be maintained, and the snare caused by the overrun of the ring rotor when the machine stand is stopped. It is possible to prevent the occurrence.

Also, since this braking force is due to non-contact,
It has no friction heat or wear, has excellent durability and smoothness, and is easy to maintain.

Further, the braking force hardly acts when the rotation of the ring rotating body is low, and the braking force effectively acts only when the rotation speed becomes high. Therefore, unnecessary braking force is not generated, energy loss is reduced, and the present invention can be applied to a low torque spinning ring.

According to the invention of claim 2, in addition to the above effect, it is possible to obtain a stable and sufficient braking force.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a front sectional view of a spinning rotary ring, FIG. 2 is a front sectional view of a spinning rotary ring of another embodiment, and FIG. 3 is still another embodiment. FIG. 4 is a front sectional view of the spinning rotary ring of FIG. 4, FIG. 4 is a plan view of the derivative and the brake shoe shown in FIG. 3, and FIGS. 5A and 5B are views showing an example of a magnetized state of the permanent magnet. 1,1a, 1b ... Ring rotor, 3 ... Lower rotor, 4, 16, 37 ...
Derivatives, 5, 17 ... Permanent magnets, 7 ... Holders, 14, 35 ... Brake shoes, 14b, 35b ... Inclined portions, 36 ... Engaging protrusions, 38 ... Engaging grooves, G, G1 ... Bearing mechanism.

Claims (2)

[Claims] 1. A spinning rotary ring comprising a holder and a ring rotating body rotatably supported by the holder via a bearing mechanism, wherein a lower end portion of the ring rotating body has an annular shape. In a free state, a brake shoe made of an elastic body having an inclined portion that opens downward to the outside is provided, and either one of the inclined portion of the brake shoe and the lower end portion of the holder has an annular shape in which magnetic poles are arranged in the circumferential direction. A permanent magnet is provided, and a derivative made of a conductive material is provided at a position facing the permanent magnet on the other of the inclined portion of the brake shoe and the lower end of the holder. Rotating ring. 2. The brake shoe according to claim 1, wherein the permanent magnets or the guides are engaged with each other so that relative movement in the circumferential direction is impossible and relative movement in the radial direction is possible with respect to the inclined portion of the brake shoe. The spinning ring for spinning according to claim 1, wherein the spinning ring is mounted on the inclined portion of the.