JP2002138330A - Method and apparatus for simultaneously centralized controlled adjustment of yarn brake of two-for-one twisting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for the simultaneously centralized controlled adjustment of the braking force of yarn brakes of a plurality of twist spindles of a two-for-one twisting machine. SOLUTION: Each twist spindle (S) has a yarn brake (30) supported between two brake rings (20, 23), and the brake rings are stepwise moved in the axial direction. A downward force acts on a support frame (11) attached to a yarn balloon guide (9), and the yarn balloon guide gives a downward axial pressure to a yarn guide pipe (3) to cause the axial movement of the brake rings.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for simultaneous central control of a capsule thread brake on a plurality of rotating spindles of a double twister machine.

[0002]

2. Description of the Related Art German Patent No. 4408262 (DE 4408262 C2
) Discloses a central control device for a capsule-shaped yarn brake in a yarn machine, especially in a double twister machine. This conventional device includes a control unit and a common compressed air unit, which communicates with the rotary spindle via a connection unit, each connected to a respective rotary spindle, and further comprises a respective compressed air unit. Operable to deliver air pulses to a pressurized air cylinder connected to a brake ring on a rotating spindle, the control device including a common compressed air unit for delivering pressurized air pulses to the pressurized air cylinder. Control, whereby the pressurized air cylinder moves the rotatable brake ring of all capsule thread brakes axially over a predetermined range when it receives an air pulse.

[0003] German Patent No. 3243157 (DE PS 3243157)
Discloses a rotating spindle having a capsule thread brake, the capsule thread brake being held between upper and lower brake rings. The upper brake ring is attached to the support body at the lowermost end of the yarn guide tube of the rotary spindle, and is further elastically urged toward the lower second brake ring by a spring. The support body has a plurality of support shoulders arranged around the circumference at different positions in its axial direction, and one of the support shoulders is supported by a stationary detent. The adjustment of the braking force in the capsule-shaped yarn brake is performed in the following manner, and the yarn guide tube rises against a spring force for urging the support body, and then rotates within a predetermined swing angle range, and Another support shoulder of the body engages the detent.
Thus, in this conventional device, a respective adjustment of the capsule thread brake, in particular a respective manual adjustment, is performed.

[0004]

SUMMARY OF THE INVENTION The present invention provides a method and apparatus for simultaneous centrally controlled adjustment of a capsule thread brake on a plurality of rotating spindles of a double twister machine such that a pressurized air system is not required. Is to do.

[0005]

The key points of the excellent features of the present invention are as follows. The present invention provides a sufficiently high pressure in a yarn guide tube on a plurality of rotating spindles in a purely mechanical operation performed via a plurality of yarn balloon guides commonly supported on a support frame, each of which has a The yoke holding one of the two brake rings on each rotating spindle moves axially to some extent against the biasing force of the spring, and the Following release, rotation of the brake ring advances the brake ring to a different axial position relative to the other respective second brake ring.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the double twister machine carries a thread balloon guide 9 on a plurality of rotating spindles S arranged adjacent to each other, and the thread balloon guide 9 shares a common thread guide frame 11.
The thread guide frame is movable up and down (in a guide (not shown)) in the direction of the double-headed arrow f1 parallel to the axis of the rotary spindle S.

A yarn guide frame 11 is suspended by a suspension hanger 12 on a shaft 13, and the shaft is rotationally driven by a rotational drive device 14 drivably connected to a motor 15. The downward movement of the yarn guide frame 11 is performed by the action of gravity in accordance with the controlled operation of the motor 15. Therefore, it is possible to arrange the yarn balloon guide 9 at various positions over the yarn guide tube 3,
This can affect the weft process and control the shape of the yarn balloon. In the present invention,
The thread balloon guide 9 moves downwardly through the correspondingly adjusted thread guide frame 11 to the extent that the thread balloon guide 9 exerts downward pressure on the yarn guide tube 3 of the plurality of rotating spindles S. Then, the yarn guide tube 3 is pushed downward. As described below, in this way,
It is possible to provide a central control adjustment in the thread brake of a plurality of spindles S arranged next to each other.

FIG. 2 shows a part of the hollow shaft 2 consisting of a rotationally symmetric housing 16, in which an adjusting unit 18 for applying a downward pressure on the capsule thread brake 30 and the yarn guide tube 3. The adjustment unit 18 is operable to effect a change in the braking force on the capsule thread brake 30. Adjustment unit
The cylindrical housing 27 is attached to the lower end of the yarn guide tube 3 and opens toward its bottom surface to receive a coil spring 28 that further urges the adjusting unit 18 upward. I have it.

The housing 16 is closed at the top by a threaded cover 19 through which the yarn guide tube 3 is guided outwardly from the housing 16.
The capsule-type thread brake 30 is a bullet-shaped brake (bullet-lik
e brake), the bullet-shaped brake comprising two spring-biased movable tube sections 30. 1 and 30.
2 wherein each tube portion includes a cup or cap-like end. The lower tube section 30.2 rests against a brake ring 20 which is arranged in an axial guide or brake ring cradle 21 arranged in a groove 21.1. Coil spring 22
The brake ring support 21 abutting on the housing 16
The lower part of the thread ring receiver 21 is negatively guided by a housing bore 16.2. The table has been moved downward. The lowered thread ring 20 thus releases the bullet thread brake 30, which descends and engages the support ring 16.3 fixedly mounted in the housing; the support ring 16 .3 has a partial opening 16.31, so that the yarn introduced via the yarn guide tube 3 is sucked into the bore 21.1. Guided by 30. A yarn threading device of this type is disclosed in DE 4408262 C2 and is in any case the basic shape of a yarn introduction device as described in the adjusting unit 18 described below.

The first annular upper toothed rim 40 has a housing 27
The second annular lower toothed rim 41, which is arranged on the upper adjusting unit 18, is likewise arranged above the housing 27. The upwardly facing teeth in the lower toothed rim 41 define an axial space in the form of an opening / slot between the teeth,
The base or bottom at the opening / slot forms notches or respective support shoulders arranged at different axial heights around the circumference of the toothed rim;
Each notch or support shoulder rotates when the adjustment unit
Engage with a detent 29 projecting radially inward according to the function of the rotational position at 18.

The downward teeth on the upper toothed rim 40 are:
A downwardly extending axially extending slot between the teeth or a respective downwardly opening notch.

In FIGS. 3a to 3c for illustrating the shape of the teeth on the two toothed rims 40 and 41, the arrow f2 indicates the adjustment unit 8
Shows the direction of rotation. The tooth flanks 40.1 and 41.1 in the upper and lower toothed rims 40 and 41, respectively, extending in the direction of rotation f2, have substantially axial extensions. Downwardly flank flank 40.2 or 41.2 at upper and lower toothed rims 40 and 41, respectively.
Respectively form an upwardly inclined surface or a downwardly inclined surface which forms an angle of about 45 ° with respect to the rotation direction. The tips or peaks in the teeth of the upper toothed rim 40 are offset from the tips or peaks in the teeth of the lower toothed rim 41 in a rotational direction by a distance slightly greater than the diameter of the detent 29.

FIG. 3a shows the operating state in which the lower toothed rim 41 engages the detent 29, the detent being the spring 28
Engages the notch I between two adjacent teeth of the lower toothed rim using an adjusting unit 18 consisting of a lower toothed rim 41 which is biased upwardly by a. By the downward pressure acting on the yarn guide tube 3 by the adjusting unit 18,
Moving downward in the direction of arrow f3, the detent is initially assumed to be in the position represented by dashed line 29 'shown in FIG. 3b. Due to the further downward pressure acting on the yarn guide tube 3, the detent traverses along the flank 40.2 and deviates from the rotational direction f2 and subsequently corresponds to a partial rotation of the adjusting unit 18 in the rotational direction f2. Reaches the intermediate position 29 ″ shown in FIG. 3c.
The movement of 29 is along the path at the curved arrow f5 shown in FIG. 3a. The stationary detent 29 does not change its position in the axial direction, but rather the adjusting unit 18 partially rotates in this process.

Thereafter, when the yarn guide tube 3 is released again,
As shown in FIG. 3c, the adjusting unit 18 is again biased upward in the direction of arrow f4 by the biasing action of the spring 28 and the detent 29 is moved (according to the path indicated by the bent arrow f6) to the next position. It engages the notch II, thereby causing the adjustment unit 18
The movement of the detent 29 along the flanks 41.2 in the direction of the rotation direction f2 is followed by a further partial rotation of.

The lowering and subsequent release of the yarn guide tube 3 and the adjustment unit 18 continue the partial rotation of the adjustment unit 18 in the direction of rotation f2. Since each notch is lower than the immediately preceding notch, when the detent 29 engages with the next notch, the brake ring 23 moves to a lower position in accordance with the lowering and releasing movement of the yarn guide tube 3 and thus the braking force Bring an increase.

The braking force can thus be adjusted in a stepwise manner via the respective downward pressure and release procedure in the yarn guide tube 3 until the braking force reaches a maximum value, the maximum value being the lower tooth It has a predetermined value depending on the depth of the deepest notch in the attached rim 41.

Through multi-stage operation (ie, a number of operations including down pressure and release in the yarn guide tube 3), the yarn brake force causes the detent 29 to eventually reach the deepest notch of the lower toothed rim 41. It can be increased until it engages.

Due to the stepwise or continuous actuation in the yarn guide tube 3, the detent 29 subsequently moves to the next (highest located notch) in the lower toothed rim 41, the notch having the smallest notch. It corresponds to the braking force adjustment position.

The toothed rims 40 ', 41' in FIG. 4 are designed as lower components, which are freely rotatable with respect to the rest of the adjusting unit 18, but are not axially adjustable. Rim 40 'with teeth,
41 ', from below, by means of the collar of the housing 27, from above, for example via a threaded screw 61;
Is held by the detent body 60 attached to the main body.

As shown in FIG. 5, the thread balloon guide may alternatively be attached to the associated thread guide tube 3, such as a truncated ball-shaped thread balloon guide 9 ′. It may be constituted by a self-centering type.

This specification incorporates by reference the disclosure of the German Patent No. 10045909.9. (DE 10045909.9.) Priority certificate and is presented here.

Of course, the present invention is not limited to the specific disclosure in the specification and drawings, but includes any modifications within the scope of the appended claims.

[Brief description of the drawings]

FIG. 1 shows a perspective view of a double twister machine having a plurality of thread balloon guides commonly mounted on a vertically movable thread guide frame.

FIG. 2 shows an enlarged cross-sectional perspective view of a rotating spindle having a hollow shaft in which a capsule thread brake is arranged.

FIG. 3 (a) is an enlarged perspective view showing a part of the adjusting unit, and illustrates a second example of the adjusting unit in operation for adjusting the braking force of the rotary spindle with respect to the stationary detent; One position. FIG. 3 (b) is an enlarged perspective view showing a part of the adjusting unit, which is in a second position in the operating unit being operated to adjust the braking force of the rotary spindle with respect to the stationary detent. It is. FIG. 3 (c) is an enlarged perspective view showing a part of the adjusting unit, in a third position of the adjusting unit in operation to adjust the braking force of the rotary spindle with respect to the stationary detent. It is.

FIG. 4 is an enlarged perspective view showing a modification of one embodiment of the adjustment unit.

FIG. 5 is an enlarged perspective view of a rotating spindle having a modified embodiment of the thread balloon guide.

[Explanation of symbols]

 3 ... Yarn guide tube 9 ... Yarn balloon guide 11 ... Yarn guide frame 18 ... Adjustment unit 20 ... Brake ring 23 ... Brake ring 30 ... Yarn brake 40 ... Rim with upper teeth 41 ... Rim with lower teeth S ... Rotating spindle

Claims (8)

[Claims] 1. A method for simultaneous centrally controlled braking force adjustment of a capsule thread brake on a plurality of rotating spindles of a double twister machine, each of said rotating spindles being axially spaced from one another. A bullet-shaped braking device disposed within a hollow shaft having a capsule-like thread brake held between two brake rings, one of the brake rings having the brake ring in a new axial position; It is rotatable in response to downward axial pressure acting on itself to undergo discontinuous axial movement, and in its new position, when the downward axial pressure acting on itself is interrupted, A brake ring is engaged and each of the rotary spindles includes a yarn guide tube and a respective yarn balloon guide disposed above the yarn guide tube. A simultaneous centrally controlled braking force adjustment method, which comprises: a support frame on which the thread balloon guide is mounted and which is movable up and down parallel to the hollow shaft of the rotating spindle; With a downward axial force acting, the thread balloon guide attached to the support frame simultaneously exerts a downward axial pressure on the yarn guide tube of the rotating spindle, the pressure of Causing the rotatable, axially adjustable brake ring to move to a new axial position in the yarn guide tube of a rotating spindle, thereby acting on the rotating spindle throughout the travel of the yarn. A simultaneous centrally controlled braking force adjustment method that includes the steps of achieving simultaneous braking force adjustment. 2. A simultaneous centrally controlled braking force adjustment device for a plurality of capsule thread brakes, each disposed within a respective rotating spindle of a double twister machine; A thread brake held in the hollow shaft by two axially spaced brake rings, one of the brake rings being rotatable in response to an axial pressure acting on itself, whereby the brake ring The rotation results in a discontinuous axial movement of the brake ring to a new axial position, at which position the brake ring is engaged when the axial pressure acting on it is interrupted, and Has a yarn guide tube which forms part of its hollow shaft, and the double twister machine comprises a yarn balloon. A centrally controlled braking force adjustment device having a plurality of thread balloon guides associated with respective rotating spindles for guiding the shape of the rotating spindle, wherein said simultaneous centrally controlled braking force adjustment device comprises: Mounting means for mounting said brake ring to said yarn guide tube of each of said respective rotating spindles, said brake ring being a brake ring for converting rotation to axial movement of said brake ring; A support frame movably attached to the double twister machine for vertical movement substantially parallel to the axis of the rotary spindle, the support frame comprising a plurality of thread balloons.
A guide is attached to the support frame, each of the thread balloon guides exerting downward pressure on the thread guide tube of the respective associated rotating spindle simultaneously with the other thread balloon guides; The simultaneous downward axial pressure is thus applied to the brake ring attached to the yarn guide tube of the rotating spindle such that the one brake ring rotates and performs a corresponding axial movement. A centrally controlled braking force adjusting device comprising: a frame; 3. A plurality of adjusting units, each associated with a respective rotary spindle, each mounted on a hollow shaft in a respective rotary spindle and projecting radially inward relative to the respective associated adjusting unit. A plurality of radially projecting detents; each adjustment unit having an annular upper toothed rim and an annular lower toothed rim;
The upper toothed rim has a plurality of downwardly oriented teeth disposed about its circumference, with downwardly open slots configured between adjacent teeth; An upwardly-opening slot configured between adjacent teeth having a plurality of circumferentially disposed upwardly-directed teeth; the teeth of the upper toothed rim and the teeth of the lower toothed rim; Cooperate with each other to engage the respective radially inwardly projecting detents in response to the downward axial pressure acting on the yarn guide tube, and wherein the adjustment unit is stationary. Being guided by the stationary detent for rotation in a predetermined rotational direction relative to the detent; the top of the teeth of the upper toothed rim is angularly aligned with the top of the teeth of the lower toothed rim; At the teeth of the upper toothed rim The respective flank surfaces and the respective flank surfaces of the teeth of the lower toothed rim are at selected angles in an upward angle and a downward angle with respect to a predetermined rotation direction, and the upper toothed rim is The teeth and the teeth of the lower toothed rim guide the rotational movement of the adjusting unit relatively along a stationary detent, the method being as follows, wherein the stationary Detents disengage from engagement at respective notches between the teeth of the lower toothed rim when the downward axial pressure acting on the yarn guide tube is interrupted, and subsequently release the lower toothed rim. 3. A simultaneous centrally controlled braking force adjustment device according to claim 2, wherein said device engages another notch between said teeth. 4. In the upper and lower toothed rims,
4. A simultaneous centrally controlled braking force adjustment device according to claim 3, wherein these flank surfaces, which are angled upward with respect to the direction of rotation, extend substantially axially. 5. The angled flank surface of the upper and lower toothed rims is about 45 ° with respect to the direction of rotation.
4. The simultaneous centrally controlled braking force adjustment device according to claim 3, wherein the angle is formed. 6. A spring acting on the lower toothed rim of the adjustment unit for biasing the adjustment unit upward in the axial direction, whereby the downward movement of the yarn guide tube is provided. 3. The simultaneous center according to claim 2, wherein, when the axial pressure is interrupted, the upward axial biasing force of the adjusting unit causes the engagement of the detent at the next notch of the lower toothed rim. Controlled braking force adjuster. 7. The toothed rims are each configured as a lower component that is freely rotatable with respect to the rest of the adjustment unit, the toothed rims being adjustable in the axial direction. The simultaneous central control type brake force adjusting device according to claim 2. 8. The yarn balloon guide of claim 2, wherein said yarn balloon guides form ball-shaped yarn balloon guides, each centered on said yarn guide tube in said respective associated rotating spindle. 2. The simultaneous central control type brake force adjusting device according to item 1.