JPS6342009B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotating ring for spinning, and particularly to a passive rotating ring in which a ring rotating body rotates using the sliding friction resistance of a rotating traveler as torque.

[Conventional technology and its problems]

A rotating ring for spinning using a passive rotation system in which a ring rotating body rotates using the sliding frictional resistance of a traveler as torque is known as Japanese Patent Publication No. 15934/1983.

However, the conventional spinning ring described above has a complex structure and requires many high-precision parts, making it expensive and difficult to mass produce.
There are restrictions on its uses, and it lacks versatility when used for low-cost applications such as cotton and short fiber blends.

In addition, in the spinning spinning ring described above, a triangular annular sliding flange is fitted to the center outer periphery of the ring rotating body, and the sliding flange is inserted into a tapered groove with a triangular cross section recessed in the inner peripheral surface of the holder consisting of the upper and lower bearing seats. The triangular annular protrusion is fitted therewith, thereby forming a slidable shaft bearing.

Therefore, large pieces of fluff dust that have entered the internal gap of the spinning rotating ring are removed by the taper on the outer periphery of the ring rotating body and the dust evacuation mechanism of the diagonal groove. Although it is discharged in
Fine particles of dust generated from fine short fibers, oils, etc. that are not bulkier than the gap between the tapered parts are not subjected to the clamping pressure friction caused by the taper between the outer circumference of the ring rotating body and the inner surface of the holder, but are instead compressed by centrifugal action. While adhering to the sliding collar and moving slightly, it gathers in the gap at the tip of the larger-diameter triangular groove, accumulates in the triangular groove of the holder, receives compressive force, and becomes a felt-like harmful friction resistance object. This was a factor that inhibited the rotation of the ring rotating body.

Furthermore, in the spinning spinning ring described above, the triangular sliding shaft bearing is located approximately at the center of the inner peripheral surface of the holder, and the gap from the triangular sliding collar to the upper dust exhaust opening is long and at a steep angle. Since there were two bent parts, the air fluff in the upper gap where dust easily enters is accumulated and pressurized at the bent area and becomes felt, making it difficult to remove the dust and causing air fluff clogging.

In view of the above-mentioned problems, the present invention prevents even low-volume dust from accumulating on the shaft bearing, makes dust removal easier, and simplifies the structure of the shaft bearing, reducing costs. It is intended to.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention has a ring rotating body formed with a V-shaped circumferential groove whose cross section is V-shaped and opens outward, and a holder that is formed with a V-shaped circumferential groove that is approximately similar to the V-shaped circumferential groove. A triangular flange ring having the same shape and protruding inward is formed, the V-shaped circumferential groove and the flange ring constitute a shaft bearing portion with a slight play, and the shaft bearing portion allows the ring to rotate. The body is rotatably supported by the holder, and a taper is provided between the outer circumferential surface of the ring rotating body and the inner circumferential surface of the holder, the diameter of which gradually increases upward and downward from the shaft bearing. A shaped gap is provided respectively, and the tapered gap is formed to be wider than the minute gap provided in the shaft bearing part.

[Effect]

The ring rotating body is rotatably supported by the shaft bearing, and rotates using sliding frictional resistance with the rotating traveler as torque.

Between the ring rotating body and the holder, there is a slight clearance in the bearing part, and tapered gaps above and below the bearing part, both of which are open to the outside. Even if dust enters, its centrifugal force will force it out.

The tapered gap is wider than the minute clearance provided in the bearing, so when the ring rotating body rotates, the ring rotating body is supported only by the bearing, and the ring rotating body and the ring rotating body are supported only by the bearing. What is a holder?
There is no direct contact in the tapered gap, and smooth rotation occurs.

〔Example〕

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

FIG. 1 is a partially sectional front view of a rotating spinning ring. FIG. 2 is a partially enlarged front view showing a part of FIG. 1 when the ring rotating body 1 rotates normally and the shaft bearing A is in a floating state.

The ring rotating body 1 is constructed by integrating a flange rotor 1a and a lower rotor 1b by fitting them together.

The ring rotating body 1 is formed with a V-shaped circumferential groove 11 that is open to the outside and has a V-shaped cross section, and the holder 2 is formed with a V-shaped circumferential groove 11 that has a cross section that is approximately the same as the V-shaped circumferential groove 11 and is opened radially inward. A protruding triangular collar ring 12 is formed. These V-shaped circumferential grooves 11 and the collar ring 12 constitute a shaft bearing part A having minute clearances a1 and a2, and this shaft bearing part A allows the ring rotating body 1 to
is rotatably supported by the holder 2.

The holder 2 is made of an oil-free, wear-resistant material with a low coefficient of friction (for example, polyamide-imide or filled tetrafluoride resin), and even when the ring rotating body 1 is in contact with the bearing A, there is no contact resistance. is small, and the ring rotating body 1 rotates smoothly even when subjected to minute torque.

Moreover, the shaft bearing part A is provided so as to be located above the central part of the ring rotating body 1 and the holder 2, so that the fulcrum of the ring rotating body 1 is the flange part of the traveler 10 that rotates in contact with the bearing part A. Even if the ring rotating body 1 approaches the force point of 1 and receives changes in vertical and diametrical vectors due to changes in spinning tension and rotational speed, no center runout or oscillation occurs.

Further, tapered gaps b1 and b2 are provided between the outer circumferential surface of the ring rotating body 1 and the inner circumferential surface of the holder 2, which face each other, and whose diameters gradually increase upward and downward from the bearing part A, respectively. These tapered gaps b1 and b2 are formed to be wider than the minute gaps a1 and a2 provided in the bearing portion A.

The minute gap a1 and the tapered gap b1, and the minute gap a2 and the tapered gap b2 are continuous, and the tapered gap b1 has a larger inclination angle with respect to the axis (vertical line) than the minute gap a1. , the angle of inclination of the tapered gap b2 with respect to the axis is smaller than that of the minute clearance a2. Further, the length of the tapered gap b1 in the cross section is shorter than the length of the tapered gap b2.

As a result, the dust in the minute gap a1 and the tapered gap b1 is moved by the centrifugal force into the tapered gap b1.
The dust in the minute clearance a2 and the tapered gap b2 is easily discharged downward and outward by the centrifugal force or gravity.

Furthermore, a large number of oblique grooves c1 and c2 are formed on the outer circumferential surface of the ring rotating body 1. With these, as the ring rotating body 1 rotates, an air flow directed outward is generated in the tapered gaps b1 and b2, and a sufficient dust removal effect can be obtained even when the ring rotating body 1 rotates at a low speed. At the same time, the effect of discharging the dust in the tapered gap b2 to the lower end circumferential opening is enhanced due to the natural fall of the dust due to its own weight, the taper clamping pressure effect, and the physical friction caused by the oblique groove c2.

Further, on the upper outer peripheral edge of the flange rotor 1a, a dust cover 3 made of a soft elastic material and having diagonal grooves 3a formed on the inner wall that cause an air flow to be blown out during rotation is provided at the opening of the tapered gap b1. It is attached to cover the

This dust cover 3 serves as a dust-proof cover to prevent fine powder such as short fibers or oil agents falling from the spun yarn squeezed by the snail wire or traveler 10 from directly entering into the tapered gap b1. , when the machine is stopped, the thin outer periphery of the dust cover 3 contacts the upper periphery of the holder 2,
It also serves as a brake to stop the rotation of the ring rotating body 1 before the spindle stops rotating.

In addition, in order to prevent the ring rotating body 1 from rotating at an excessively high speed, a large number of oblique blades 5 are provided at equal intervals on the outer circumferential slope of the dust cover 3. If a downward hanging force is generated and the ring rotating body 1 rotates at an excessively high speed, the ring rotating body 1 is pulled down to apply frictional pressure to the bearing part A, and the tip periphery of the dust cover 3 is lowered. Then, it is brought into contact with the outer periphery of the flange of the holder 2 to perform a braking action.

Further, a brake ring 6 is provided at the lower end of the lower rotor 1b. This brake ring 6 is
It is an annular body made of soft elastic material (for example, synthetic rubber or synthetic resin) with an L-shaped cross section and a rim that opens slightly downward.A metal ring 7 is inserted into the inner core, and the rigidity of this metal ring supports the lower rotor. It is press-fitted and fixed to the lower peripheral edge of 1b and is integrated.

The tip flange of the brake ring 6 becomes a brake ring plate 6b that opens slightly outward and downward from the part fitted to the ring rotating body 1, and when the ring rotating body 1 rotates at low and medium speeds, it opens from the lower end circumference of the holder 2. When the ring rotating body 1 gradually rotates at high speed while facing each other without contact with an appropriate gap, the circumference of the tip of the brake ring plate 6b gradually lifts due to the action of centrifugal force and begins to come into contact with the circumference of the lower end of the holder 2. When the rotation becomes faster and exceeds a certain limit (approximately 5000 RPM in the experiment), the tip edge of the brake ring plate 6b rises horizontally like a valve and applies strong frictional pressure to the lower edge circumference of the holder 2, causing the ring to rotate. It has the effect of lowering the body 1, and also applies contact friction to the bearing part A to act as a brake to control excessive speed increase of the ring rotating body 1, and serves to prevent the occurrence of snarl when the machine is stopped.

Further, the brake ring plate 6b has a large number of diagonal grooves 6a formed on its inner upper surface, and as the ring rotating body 1 rotates at medium and high speeds, a tapered gap b is formed.
This function generates an air flow outward from the opening of No. 2, and discharges the dust discharged from the minute gap a2 and the tapered gap b2 to the lower end to the outside of the ring.

According to the embodiment described above, between the ring rotating body 1 and the holder 2, there are small gaps a1 and a2 in the bearing part A, and tapered gaps b1 and b2 upward and downward in the bearing part A. are provided, and all of these are open to the outside, so even if dust enters, it will not accumulate, and the dust will be expelled to the outside by its centrifugal force.

Moreover, since the tapered gaps b1 and b2 are formed wider than the minute clearances a1 and a2 provided in the bearing part A, when the ring rotating body 1 rotates, the ring rotating body 1 is The ring rotating body 1 and the holder do not come into direct contact in the tapered gap, and rotate smoothly.

〔Effect of the invention〕

According to the present invention, between the ring rotating body and the holder, a slight clearance is provided in the bearing part, and tapered gaps are provided above and below the bearing part, and both of these are provided on the outside. Because it is open, even if dust enters, it will not accumulate, and even bulky dust will be expelled by its centrifugal force.

Moreover, since the tapered gap is wider than the minute clearance provided in the shaft bearing, when the ring rotating body rotates, the ring rotating body is supported only by the bearing, and the ring rotating body and the holder do not come into direct contact at the tapered gap, allowing smooth rotation.

In addition, the rotating ring for spinning according to the present invention has a simple shaft bearing structure, can be manufactured at low cost, and is excellent in mass productivity.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, in which FIG. 1 is a partially sectional front view of a rotating ring for spinning, and FIG. 2 is a partially enlarged front view showing an enlarged part of the rotating ring for spinning shown in FIG. be. DESCRIPTION OF SYMBOLS 1... Ring rotating body, 2... Holder, 10... Traveler, 11... V-shaped circumferential groove, 12... Flange ring, A...
Bearing portion, a1, a2...minor clearance, b1, b2...tapered gap.

Claims (1)

[Claims] 1. A V-shaped circumferential groove with a V-shaped cross section and an outward opening is formed in the ring rotating body, and a holder has a V-shaped circumferential groove with a cross section that is approximately the same shape as the V-shaped circumferential groove. A flange ring is formed that protrudes inward, and the V-shaped circumferential groove and the flange ring constitute a bearing part with a slight clearance, and the bearing part allows the ring rotating body to move relative to the holder. A tapered gap is provided between the outer circumferential surface of the ring rotating body and the inner circumferential surface of the holder, the diameter of which gradually increases upwardly and downwardly from the bearing portion. A rotating ring for spinning, wherein the tapered gap is wider than a minute gap provided in the shaft bearing.