JPS594047Y2 - Sliver opening roll in open-end spinning equipment - Google Patents

Description

[Detailed description of the invention] The present invention is an open-end spinning device for use in open-end spinning equipment in which a needle shaft is embedded in a bore provided in a cylindrical body for opening sliver, and the needle head protrudes from the cylindrical body. This relates to fiber rolls.

In known opening rolls of the above-mentioned type, for example as disclosed in U.S. Pat. Have difficulty.

For example, due to incorrect insertion, bending of the needle during implantation, or incorrect needle profile, a narrow annular gap may form between the needle and the bore wall, and the taper along the needle may When viewed in cross section, it has a crescent shape.

Fibers become trapped in such gaps, resulting in undesirable fiber build-up on the needles and therefore on the roll surface.

If such a phenomenon occurs, simply the opening action of the needle, i.e. its opening efficiency, is impaired by the increase in clumps due to the accumulated fiber material, and these clumps are unraveled haphazardly, resulting in open-end spinning. The fibers are fed randomly to the fiber collection surface of the device, and such uneven fiber feeding results in uneven yarn being spun.

If the point at which the cylindrical needle shaft changes into a pointed cylindrical portion is below the roll surface, that is, if this cylindrical portion of the needle extends into the needle shank bore, then The obstruction increases and an annular gap forms along the needle.

The object of the present invention is to use a needle of the type mentioned at the outset, to eliminate the disadvantages of known opening rolls, and to avoid undesirable accumulation of fibers on the needles at the roll surface.
Moreover, it is an object of the present invention to provide a sliver opening roll for an open-end spinning machine, which allows the needle to be inserted into the bore.

This purpose is achieved by a sliver opening roll as already mentioned, which has an external, wide recess with side walls and a base and with needles open on all sides; Below this foundation a bore is formed in which the needle shaft is firmly planted.

According to the invention, all sides of the needle exist freely between the roll surface and the bore due to the formation of the depression by the foundation,
Therefore, even if the needle is imprecisely implanted in the bore, or even if the needle is bent during implantation, or even if the needle profile is inaccurate, the individual needle is independent of the fiber jam. Therefore, undesirable accumulation of fibers on the roll surface is prevented from occurring.

According to the present invention, the tapered gap that is created between the needle and the bore when the needle is implanted is located below the roll surface and is pulled away from the roll surface by the indentation, so that the fibers cannot be gripped. Since it is not possible, it can be ignored.

The opening roll of the present invention has various advantages.

For example, the cylindrical portion of the needle reaches into the bore, and the annular tapered gap formed therein for the cylindrical portion of the needle cannot reach the fibers because of the indentation.

By selecting the cross-sectional area of the recess preferably larger than the cross-sectional area of the bore, a gap is formed between the needle and the longitudinally extending side wall of the recess facing the needle, so that even if fibers enter this gap, they will not get stuck. In a known manner, it is again removed from the gap by an air stream acting on the opening rolls.

Preferably, the depth of this depression and the width at the base are such that it ensures free movement of the fibers, i.e. no gripping of the fibers, yet the depression is sufficiently far from the roll surface;
The gap is formed to such an extent that even if fibers enter this gap, they will not reach the base (bottom) of this depression.

The needle shaft can be pressed into the bore and implanted.

Alternatively, it can be planted with radial clearance and firmly fixed using a fixing medium such as synthetic resin.

The needles can be provided on the opening roll radially or obliquely when viewed in the direction of rotation of the roll.

Hereinafter, the structure, function and effect of the opening roll of the present invention will be explained in detail with reference to the accompanying drawings.

In the open-end spinning machine shown in FIG. 1, the sliver 1 is fed to the opening roll 5 by means of a feed roll 3 and an elastically pressurized pedal lever 2 cooperating therewith.

The sliver roll 5 is rotatably supported in a housing 4 and is driven in the direction of the arrow A, i.e. it is fitted with needles 6 inclined forward in the direction of rotation A, which separate the supplied sliver into individual pieces. Defibrates into fibers.

From the opening rolls 5, which supply the individual fibers, a fiber supply duct 7 guides the fibers and air to the spinning rotor 8.

This spinning rotor 8 is kept under suction and is rotatably and drivably held via a shaft 11 in a bearing 12 in a housing 9 with a cover 10 .

The individual fibers are deposited on the fiber collection surface of the spinning rotor 8, where they are spun into yarn 14, which is passed through a pair of take-off rolls 1.
6 and taken out from the rotor via the take-out duct 15, and then wound onto a bobbin package (not shown).

As shown in FIG. 2, the opening roll 5 is installed in a hollow chamber 17 of a stationary housing, which covers the
It is sealed at 8.

The opening roll 5 is fixed to a shaft 19, while this shaft 1
9 is rotatably supported around an axis C within a bearing 20.

This opening roll 5 has a cylindrical bub 21 fixed to a shaft 19a with a reduced diameter, and side surfaces 22 extend radially outward from the bub 21.

A cylindrical ring 23 made of aluminum or brass is mounted coaxially on the bub 21 with an inner cylindrical surface 24, the outer circumferential surface of which forms the roller surface 25 of the opening roll 5.

A needle 6 with a cylindrical needle shaft 26 is fitted tightly into a respective bore 27 passing through the ring 23 on its inner circumference, and the needle 6 has a circular shape extending beyond the roll surface 25 to the tip 29 of the needle. It has a vertebral portion 28.

The side surface 22 has a radial flange 30 which extends a radial distance beyond the roll surface 25, and the needle tip 29 also projects beyond the roll surface 25 by the same distance.

The needles 6 are arranged in rows 31 extending parallel to the roll axis C and at equal intervals along the circumference with a gauge E.

The needle spacing F in the needle row is smaller than E.

However, it is also possible to use, for example, a roll in which needles are planted at the same density over the entire surface of the roll.

From FIG. 3 to FIG. 5, the needle 6 according to the present invention
One of the recesses 32 is shown coaxially with the bore 27.

The diameter of this hole is H, which is larger than the bore diameter G.
The depth of the depression is indicated by t, but needle 6
The needle shaft bore 2 passes through the shoulder 33 that is slightly inclined toward the
It has reached 7.

In FIG. 5, the needle shaft 26 has a diameter G1 and is press-fitted into the bore 27 so as to overcome the centrifugal force acting during operating conditions.

The recess 32 of diameter H forms an annular gap 37 surrounding the needle 6, the depth of which is equal to the distance from the hole wall 36 of the recess 32 to the needle surface 34 in the base formed by the shoulder 33. It's also big.

The diameter H is selected on the one hand by the thickness of the needle, i.e. the shaft diameter G1, where G1 is between 0.6 and 1.0 mm, preferably 0.
．． It is within the range of 6 to Q, 8 mm.

H is at least 0.7 m for Q, needle diameter G1 of 5 mm
Choose equal to m.

On the other hand, the diameter H is selected so that the distance substantially exceeds the fiber thickness, but the fiber thickness ranges from 0.002 to Q,
Q5mm, so b is, for example, 08Q5 m
Choose a size larger than m.

The thickness of the cotton fibers ranges from 0°002 to 0.01 mm.

Therefore, b is selected within the range of 0.05 to 0.15 mm.

The minimum value of depth t is selected within the range of 1 to 10 times the distance.

Preferably it is 5 times the distance.

The upper limit of the depth t is determined according to the length of the bore 27 necessary to ensure the stability of the needle shaft 26.

The needle 6 is implanted such that the transition point 38 between the needle shaft 26 and the vertebral portion 28 is located below the shoulder 33.

The tapered annular gap 39 formed between the conical portion 28 and the needle shaft bore 27 cannot be reached by the fibers due to the recess 32, thus preventing fiber jamming.

Even if fibers enter the annular gap 37, they will not be caught and therefore will not accumulate on the needle 6.

This can be made more effective by increasing the distance between the needle 6 and the bore wall 36 towards the roll surface 25.

In FIG. 6, mechanical elements that are the same as those shown in FIGS. 1 and 2 are designated by the same reference numerals.
1 is provided coaxially with the bub 21, the cylindrical shaft 43 of the needle 42 is provided on the bore 44, and the conical portion 46 of the needle 42 is provided on the bore 44.
has reached a point 45 protruding from the roll surface 40.

Along the row of needles 42a, a depression 47 develops in the axial direction in the form of a groove with a rectangular cross section of side walls 48, 48a, depth t and base 49 of width.

The width of this base 49 is larger than the diameter M of the bore 44.

A gap 50 of depth tl is left freely between the needle axis 43 and the opposite side wall 48 or 488 extending along the needle 42, which gap is the distance from the side wall 48 or 48a to the needle face 51. The base portion 49 is larger than the distance b1, and its width can be selected to be in the range of 1 to 10 times the distance b1.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of an open-end spinning device using a spreading roll according to the present invention, FIG. 2 is a cross-sectional view of the spreading roll shown in FIG. 1 along line II-II, and FIG. Figure 3 is the second
A partially enlarged sectional view of the opening roll shown in the figure, FIG.
5 is a sectional view taken along line V-IV in FIG. 3, FIG. 6 is a sectional view taken along line V--■ in FIG. FIG. 7 is a schematic perspective view of another embodiment of the fiber roll, including a cross section of a portion thereof. In these figures, 1 is the sliver, 2 is the pedal lever,
3 is a supply roll, 4 is a housing, 5 is an opening roll, 6
is a needle, 7 is a fiber supply duct, 8 is a spinning rotor, 9
is a housing, 10 is a cover, 11 is a shaft, 12 is a bearing, 14 is a thread, 15 is a thread take-off duct, 16 is a take-out roll, 17 is a hollow chamber, 18 is a cover, 19 is a shaft, 20 is a bearing, 21 is a cylinder shaped house or bub, 22 is the side,
23 is a ring, 24 is a cylindrical surface, 25 is a roll surface, 27
28 is a bore, 28 is a conical portion, 29 is a needle tip, 30 is a flange, 31 is a needle row, 32 is a recess, 33 is a shoulder, 34 is a needle surface, 36 is a bore wall, 37 is a gap, 3
9 is an annular gap, 40 is a roll surface, 42 is a needle, 43
44 is a cylindrical shaft, 44 is a bore, 45 is a needle tip, 46 is a conical portion, 48, 488 are side walls, 49 is a base, and 50 is a gap.

Claims (1)

[Claims for Utility Model Registration] 15. An open device having (plurality of) needles each having a needle width embedded in the bores (plurality) provided in a cylindrical body, with the tips of the needles protruding from the cylindrical body. - A sliver opening roll for an end spinning device, the side wall 36
: 48, 48 a and foundation 33 : With 49, a recess 32.47 is formed on the circumferential side of the cylindrical body to form a gap on all sides of the needle 6.42, and the foundation 33 is
a smaller bore 27 below adjacent to 49; forming a shaver, this bore 27: 44 having a needle shaft 26;
A sliver opening roll characterized by firmly implanting 43. 2. The opening roll according to claim 1, wherein the base 33: 49 forms a shoulder 33; 49 facing the needle 6; 42. 3. The opening roll according to claim 2, wherein the shoulder portion 33 is slightly inclined toward the needle 6. 4. The recess 32.47 has a depth t; tl corresponding to 1 to 10 times the distance bib between the needle surface 34: 51 of the foundation 33; 49 and the side wall 36; 48; 48a of the recess 32: 47; The opening roll according to claim 1 of the utility model registration claim, characterized in that it has the following. 5. The opening roll according to claim 4, wherein the depth 1; 11 is five times the distance b; bt. 6. The opening roll according to claim 4, which is a utility model registration, characterized in that the distance bib is approximately 0.05 to 0.15 mm, and the needle shaft diameter G1 is 0.6 to 0.8. 7. Distance bib is fiber thickness 0.002 to Q, Q5
The opening roll according to claim 4, which is larger than mm. 8. The point 38 that transitions from the cylindrical needle shaft 26 to the conical portion 28 reaching the needle tip 29 is the needle shaft bore 27
The opening roll according to any one of claims 1 to 6 of the utility model registration claim, characterized in that the roll is located below the foundation 33. 9. The opening roll according to claim 1, wherein the needle 6 is press-fitted into the bore 27. 10. A utility model characterized in that the needle 6; 42 is implanted in a ring 23: 41 having a bore 27; 44 and a recess 32; 47, and press-fitted into the hub 21 of the opening roll 5. The opening roll according to claim 1. 11. < Any one of claims 1 to 9 of the utility model registration claim characterized in that the recess 32 is provided coaxially with the needle 6 and forms an annular gap 37 surrounding the needle 6 The opening roll described in . 12. Utility model registration claim characterized in that the recess 47 is a groove extending along the needle row 42a, and a plurality of bores 44 for the needle row 42a are provided in the base 49 of this groove. The opening roll according to any one of Items 1 to 9.