JPH1112860A - Ring-spinning machine or spindle for ring twister - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ring spinning machine or a spindle for ring twisters, which is not structurally complicated, from which sliding motion in any axial direction in cut waste dangerous region while saving warp sweeping is eliminated. SOLUTION: This spindle 1 has a zone for receiving an underwinding and the zone includes a supporting shoulder 14 rotating together with the spindle 1 and a clamping means 15 arranged to the supporting shoulder 14. When the spindle 1 rotates, the clamping means 15 enlarges the diameter as a result of centrifugal force and the clamping means 15 is raised in the radial direction from the supporting shoulder 14. The clamping means 15 has preferably a form of O-ring 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION The present invention is a spindle for a ring spinning machine or a ring twisting machine, which includes a zone for receiving underwindings, in which clamping means are arranged. The gripping means relates to those which are resiliently pressed against said zone while spinning is stopped and are released from said zone due to centrifugal force acting on said gripping means while the spindle is rotating.

[0002] Underwinding is necessary on the spindle so that the spinning process can continue without end breaks occurring after automatic doffing. Underwinding occurs at the end of the spinning process where the speed of rotation is reduced and the ring rail is lowered into the area below the winder tube. In the underwinding zone of the spindle, at least one turn of the yarn accumulates and adheres by friction or the like. The fixing of the underwinding thread must be of such a size that the thread between the underwinding and the bobbin is cut as close as possible to the underwinding zone when the full bobbin is lifted off the spindle. The underwinding yarn is still connected to the yarn coming there from the drafting device. When a new winding tube is placed on the machine,
The spinning process can be restarted without an end break when the ring rail is raised into the area of the winding tube, and then starts its traversing movement. In many practical embodiments of the spindle, the underwinding yarn must be removed from the underwinding zone after the initial operation. This is known as so-called warb cleaning.

A spindle of the type described above is known from EP 35803.
2A1. It has the advantage that all worm cleaning is eliminated because the underwinding yarn of the underwinding zone does not need to be wound more than 360 ° around the spindle because it is gripped. After the spindle has been started and the gripping effect has been increased, a very short length of underwinding yarn is pulled up in the area of the winding tube and placed under the winding at the edge of the winding tube. However, known spindles have the disadvantage that the design is very complex and has sliding bearings in areas which are particularly sensitive to chips. The gripping means takes the form of a sliding ring, which is the bearing shoulder when the spindle begins to rotate.
To release it from the underwinding thread. The sliding motion is caused by centrifugal force, and if the sliding ring includes a resilient tongue on the side facing away from the supporting shoulder, the tongue deforms outward as a result of the centrifugal force and the conical guiding surface Placed on top. The guide surface forces the sliding ring in the aforementioned sliding movement away from the supporting shoulder. The opposite movement of the resilient tongue is supported by a spring element, which again guides the sliding ring towards the supporting shoulder when the spindle stops.

It is an object of the present invention to provide a structurally complex structure which eliminates any axial sliding movement in the chip-hazard zone, while maintaining the above-mentioned advantage of the spindle that all forms of worm cleaning can be omitted. Is to create a spindle that is not.

This object has been achieved in that the gripping means can be released from the zone for underwinding by essentially radial elastic deformation by the centrifugal force acting on the gripping means.

When the spindle is not in operation, the gripping means, together with the supporting shoulders, achieve an ideal gripping of the thread for fixing the thread during doffing without the aid of an additional spring element. As the spindle rotates, the gripping effect is released without any element sliding in the axial direction of the spindle, as the diameter of the gripping means expands as a result of the centrifugal force. The gripping element is released radially from the underwinding zone. 360 underwinding yarn
No more need to be wound around the spindle, so that when the winding process is restarted, the underwinding yarn is located at the edge of the winding tube without any problems. The underwinding zone is then free of any residual underwinding.

[0007] Of course, the gripping means can be designed in various ways.

In one embodiment, the gripping means takes the form of a finger spring, which comprises a resilient tongue which is pressed against the supporting shoulder and which is expandable under the influence of centrifugal force. The tubular region of the finger spring is mounted on the spindle and does not need to perform any sliding movement. When the resilient tongue is raised radially from the support shoulder, the previously held underwinding yarn is released again.

[0009] In another particularly preferred embodiment, the gripping means takes the form of an O-ring. Thus, the gripping means is not only inexpensive but also easily made, which is easily replaceable and operationally reliable. The diameter of the gripping means expands under the influence of the centrifugal force. This expandability also facilitates its assembly.

Two O-rings can be provided axially, one behind the other, which can have, for example, different diameters and / or different flexibility and / or different original stresses. Thus, the gripping effect is generally increased in the underwinding area. The purpose of the embodiment in which the two O-rings are different is that the O-ring below the spindle first opens as a result of the centrifugal force, thus enabling an orderly winding of the underwinding yarn.

It also has a rotating support ring disposed on the O-ring, with the O-ring deformed on its outer diameter when the spindle is rotating relative to the support ring, wherein the spindle is When not moving, the support ring surrounds the O-ring at a radial distance. Thus, the O-ring when it is raised from the supporting shoulder is securely fixed when the spindle is in operation.

For this purpose, the support shoulder tapers in a conical shape towards the gripping means. This allows a particularly easy opening of the gripping means by means of its radial expansion, so that the underwinding yarn is released with good timing.

It is practical for the support shoulder to gradually change to a ring surface adapted to the cross section of the O-ring. This results in a good support surface for the O-ring when the spindle is not operating, which leads to a spatially precisely defined underwinding zone.

The gripping means and / or the supporting shoulder can have a high coefficient of friction, so that, besides the gripping effect,
Produces additional frictional coupling. The coefficient of friction is achieved by either a special material or its structure.

To make the spindle more operationally reliable, a simultaneously rotating fixing ring is provided upstream of the gripping means, the fixing ring being provided with a tooth catch notch on its outer periphery. The underwinding zone is thus clearly separated from the winding area, preventing the underwinding yarn from being loosened and wound in an uncontrolled manner around the lower area of the winding tube.

If a ring cutter is provided on the fixing ring, the underwinding yarn can be cut during the doffing at defined locations. For this purpose, a ring cutter is provided downstream of the fixed ring.

[0017] These and further objects, features and advantages of the present invention will become more readily apparent from the following detailed description, taken in conjunction with the accompanying drawings.

DETAILED DESCRIPTION OF THE DRAWINGS FIG. 1 shows a state immediately before the automatic doffing of the spindle 1, in which the spindle 1 is already stopped.

The spindle 1 comprises a rotating upper part 2 and a non-rotating bearing housing 3, the latter being fixedly stationary on a spindle rail (not shown). Upper part 2
The shaft 4 of the spindle 1 which rotates together with the spindle 1 is supported in a bearing housing 3 by a neck bearing and a step bearing in a manner not shown.

The upper part 2 is a coupling element (not shown)
Receives the take-up tube 5, and the spun yarn is wound around the bobbin 6 on the take-up tube 5. The winding process is performed in a known manner by means of a ring rail 7 which can be raised and lowered, which ring rail 7 extends over a plurality of adjacently arranged spinning stations. A spinning ring 8 is arranged on each spindle 1 on which a traveler 9 rotates, which guides the yarn to the bobbin 6 during operation.

In the non-operating position shown in FIG. 1, the ring rail 7 is lowered to the area below the bobbin 6.

The drive worm 10 is located on the upper part 2 of the spindle 1.
A drive belt 11, which is typically in the form of a tangential belt, is arranged relative to the drive worm 10 and drives a plurality of adjacently arranged spindles 1. Even when the spindle 1 is braked, the drive belt 11 usually remains in its position dragging on the drive worm 10.

When the bobbins 6 are full, a so-called doffing process takes place, in which all bobbins 6 on at least one machine side are raised collectively upward from their spindles 1 and exchanged for empty winding tubes 5. Is done. For this purpose, the ring rail 7 is lowered into a region below the bobbin 6, where the so-called underwinding zone 13 of the spindle 1 is arranged. The underwinding zone 13 forms the underwinding 12, which allows the spindle 1 to be restarted after doffing without causing an end break. During the doffing process, the underwinding 12 is cut from the bobbin 6 yarn,
It remains connected to the yarn 23 coming from the drafting device. The underwinding 12 is wound less than 360 °.

In this example, the underwinding zone 13 is formed like a wedge-shaped space. It comprises a support shoulder 14 which tapers downwardly in a conical shape, against which gripping means 15 when the spindle 1 is at rest.
Are flexibly arranged. In this embodiment, the gripping means 1
5 takes the form of an O-ring 16 whose diameter is expandable when the spindle 1 rotates due to the effect of centrifugal force.

In order to ensure reliable reception of the O-ring 16 when the spindle 1 is stopped, the support shoulder 1
4 gradually changes to a ring surface 17 which conforms to the circular cross section of the O-ring 16. Underwinding 12
The O-ring 16 and / or the supporting shoulder 14 have a high coefficient of friction such that the best possible frictional coupling between the O-ring 16 and the supporting shoulder 14 occurs.

The support ring 1 which rotates together with the spindle 1
8 is disposed on the O-ring 16 and the support ring 18 surrounds the O-ring 16 at a certain distance in the radial direction when the spindle 1 is at rest, against which the spindle 1 is moved. When rotated, the deformed O-ring 16 is positioned with its outer diameter (see FIG. 2).

Above the O-ring 16, but below the winding tube 5, a so-called fixing ring 19 is arranged against the upper part 2 of the spindle 1, which locks the tooth catch notch 20. Have. Thus, even when the underwinding 12 is wound around the underwinding zone 13, the thread still connected to the bobbin 6 remains at a predetermined point on the retaining ring 19. A ring cutter 21 is provided near the lower part of the fixing ring 19 and cuts the underwinding 12 from the thread of the bobbin 6 during automatic doffing. Immediately before the formation of the underwinding 12, the yarn connected to the bobbin 6 is connected to the underwinding zone 1 by several yarn loops 22.
Reduced to 3. However, as described above, the underwinding yarn remains connected to the yarn 23 coming from the drafting device.

In the embodiment shown in FIG. 2, the bobbin 6 has been replaced by a take-up tube 5, and the spindle 1 is again driven into a rotational movement. The ring rail 7 movable in the transverse directions A and B has risen in the region of the winding tube 5 and has already formed the first few turns 24 on the winding tube 5.

As a result of the restart of the rotation of the spindle 1, the gripping means 15 in the form of an O-ring 16 are radially expanding. Thus, the O-ring 16 has been raised radially from the support shoulder 14 to release the underwinding 12.

Below the first winding 24, the released, previously gripped thread piece 25 is wound by itself around the edge of the winding tube 5. Underwinding zone 1
3 is thus free of remaining thread, so that worm cleaning is omitted. The O-ring 16 is arranged on a support ring 18 which rotates with the spindle 1 with its outer diameter and adheres there during operation.

The reference numbers in FIG. 2 are the same as those in FIG. 1, and therefore the repetitive description is omitted.

The gripper 26 shown in FIG. 3 is somewhat more complex in shape than the O-ring 16 shown in FIG. However, it has the advantage that an additional support ring is omitted.

The gripping means 26 according to FIG. 3 takes the form of a so-called finger spring 27, which is fixedly connected to the upper part 2 of the spindle 1 by a lower tubular region. However, in the region of the supporting shoulder 14, the gripping means 26 comprises a plurality of elastic tongues 28.
Which are separated from one another by axially extending slits. These resilient tongues 28 can be deformed radially under the influence of centrifugal forces and are thus raised from the respective support shoulders 14.

The resilient tongue 28 forms an underwinding zone 13 with the supporting shoulder 14 and the spindle 1
Can stop and hold the underwinding 12 when it is stopped. However, when the spindle 1 is rotating, the resilient tongue 28 is raised from the disposed supporting shoulder 14 and releases the underwinding 12, so that it is located on the lower edge of the winding tube 5 after automatic doffing. .

The reference numbers in FIG. 3 are the same as those of the embodiment according to FIGS. 1 and 2, so that a repetitive description of the remaining elements is unnecessary.

[Brief description of the drawings]

FIG. 1 is an axial view, partially in section, of an enlarged spindle, wherein an underwinding yarn is held by gripping means in an underwinding zone.

FIG. 2 shows the same spindle after resumption after automatic doffing, where the gripping means is released from the underwinding zone.

FIG. 3 is a view similar to FIG. 1 with another embodiment of the gripping means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spindle 2 Upper part 3 Bearing housing 4 Spindle shaft 5 Winding tube 6 Bobbin 7 Ring rail 8 Spinning ring 9 Traveler 10 Drive worm 11 Drive belt 12 Underwinding 13 Underwinding zone 14 Support shoulder 15 Gripping means 16 O-ring (Gripping) Means) 17 Ring surface 18 Support ring 19 Fixing ring 20 Toothed thread catch notch 21 Ring cutter 22 Thread loop 23 Thread 24 First winding 25 Thread piece 26 Gripping means 27 Finger spring (gripping means) 28 Elastic tongue piece

Claims (10)

[Claims] 1. A spindle for a ring spinning machine or a ring twisting machine, comprising a zone for receiving underwinding, in which a gripping means is arranged, in which the spinning is stopped. The gap is elastically pressed against the zone and is released from the zone due to centrifugal force acting on the gripping means during rotation of the spindle, wherein the gripping means is essentially a centrifugal force acting on the gripping means. A spindle which is releasable from the zone for underwinding by radial elastic deformation. 2. The method according to claim 1, wherein the diameter of the gripping means is expandable in the zone for receiving underwinding due to centrifugal force. spindle. 3. A resilient tongue in which the gripping means (26) takes the form of a so-called finger spring (27), which can be pressed against the supporting shoulder (14) and expandable under the action of centrifugal force. The spindle according to claim 1 or 2, wherein the spindle comprises (28). 4. An O-ring (16) comprising: a gripping means (15);
Spindle according to claim 1 or 2, characterized in that it takes the form: 5. A rotating support ring (18) coupled to a spindle is provided, with the O-shape deformed when the spindle (1) is rotating with respect to this ring (18).
A ring (16) is arranged at its outer diameter and its support ring (18) surrounds the O-ring (16) at a radial distance when the spindle (1) is at rest. The spindle according to claim 4, wherein 6. The support shoulder (14) is provided with gripping means (15; 2).
6. The spindle according to claim 1, wherein the spindle tapers in a conical shape toward 6). 7. The method according to claim 4, wherein the support shoulder changes in shape into a ring surface adapted to the circular cross section of the O-ring. spindle. 8. Spindle according to claim 1, wherein the gripping means (15; 26) and / or the supporting shoulder (14) have a high coefficient of friction. 9. A rotating fixing ring (19) coupled to a spindle is provided upstream of the gripping means (15; 26), the fixing ring (19) being provided on its outer periphery with a tooth catch notch (20). The spindle according to any one of claims 1 to 8, comprising: 10. Spindle according to claim 9, wherein the ring cutter (21) is arranged on the fixing ring (19).