JP2017218716A - Thread clamp apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thread clamp apparatus capable of cleaning the thread clamp apparatus as necessary without problems.SOLUTION: The thread clamp apparatus 14 is for a spindle 2 of a spinning machine or a yarn twister and comprises a first clamp element 15 arranged on a spindle upper side portion 3, a second clamp element 18 supported movably in an axial direction with respect to the first clamp element, a loading apparatus that applies a pressure on the second clamp element with a spring force toward the first clamp element, and a load-removing apparatus that positions the second clamp element with a centrifugal force with an interval from the first clamp element and has an under-winding tube 16 arranged on a spindle upper side portion. The under-winding tube comprises a guide apparatus 22 that forms a mechanical type locking apparatus for the second clamp element with a corresponding guide adding part in the second clamp element supported movably.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a yarn clamping device for a spindle of a spinning machine or a twisting machine, the first clamping element being fixedly arranged on the upper part of the spindle, and the axial direction relative to the first clamping element A second clamp element that is movably supported, a load device that presses the second clamp element toward the first clamp element based on a spring force, and a second clamp element that is based on a centrifugal force. The present invention relates to a yarn clamping device comprising: a load removing device that positions with respect to one clamping element at intervals.

  As is well known, in a ring spinning machine, it is known that after the spinning cup on at least one machine long side is completed, so-called spinning end (Abspinnen) is first performed. The corresponding machine long side is prepared for the subsequent spinning cup change.

  In this connection, the ring spinning machine has moved the ring rail from the upper position to the lower region of the spinning winding tube of the spinning cup relatively quickly after the completion of the spinning cup on one machine long side. At this time, the yarns are usually guided downwardly over the surface of the spinning cup in a relatively steep spiral. The ring rail is then braked in this position, so that the yarn is wound several times in the transverse direction across the spinning cup. With this so-called reserve winding, the yarn of the spinning cup is fixed for further subsequent transport.

  The ring rail is then moved relatively quickly and somewhat downwards to the so-called winding point of the spindle, where it is braked anew. At this time, the yarn is newly wound in the form of a plurality of windings in the region where the spindle is wound.

  These underwindings, which are fixed at the so-called winding position of the spindle, each form a spinning start yarn (Anspinnfaden), and this spinning start yarn starts spinning again after changing the spinning cup. Will be needed for. That is, the ring rail is spun upward again after drawing the finished spinning cup from the spindle of the ring spinning machine and after installing a new spinning winding, where the yarn is cut off between reserve winding and underwinding respectively. It is moved to the lower region of the winding tube and the spinning start yarn is wound around a new spinning winding tube.

  The disadvantages of such a method are that the underwinding remains at the winding point of the spindle, and this residual underwinding becomes a significant volume after a certain number of spinning cups have been replaced, often with insufficient removal from the underwinding area. There is in not getting.

  Therefore, in order to facilitate the replacement of the spinning cups, in particular to avoid the time-consuming cleaning of the winding part of the spindle, a thread clamping device is arranged in the underwinding area of the spindle and this thread clamping device is used to temporarily A variety of proposals have already been presented in the past, such as enabling a simple fixing and thus no winding of the yarn around the spindle underwinding region.

  Such a thread clamping device, which is described in DE 196 28 826 A1, described in German Patent Application DE 196 28 826 A1 and arranged in the underwinding region of the spindle, And a second clamping element supported so as to be axially movable with respect to the longitudinal axis of the spindle.

  These clamping elements are pressed towards each other by a compression spring supported on a second clamping element and a warb that are movably supported, thereby providing a clamping moment between the clamping elements.

  In this known thread clamping device, the second clamping element has a conical ring surface that is inclined inwardly, and this ring surface together with the fixed first clamping element is a ring chamber. A centrifugal force element supported in a movable manner is disposed in the ring chamber.

  When the limit rotational speed of the spindle is exceeded, the force exerted on the movable clamping element from the centrifugal force element is greater than the spring force of the compression spring, so that the second clamping element movably supported Moves in the axial direction, thereby opening the thread clamping device.

  Correspondingly, this known thread clamping device moves again into the clamping position when it falls below the limit rotational speed of the spindle, in which the end faces of both clamping elements are crimped together.

  The yarn clamping device described in DE 196 28 826 has been found to be good in practice. However, these known thread clamping devices often present difficulties when the thread clamping device is soiled with thread residues, which is unexpected. That is, in this known thread clamping device, the second clamp element that is movably supported cannot be positioned at the cleaning position when the spindle is stopped.

  Also, German Patent Application Publication No. 102006022484 (DE 10 2006 022 484 A1), German Patent Application Publication No. 102008058655 (DE 10 2008 058 655 A1) and / or European Patent Application Publication No. 2530041. Document (EP 2 530 041 A1) likewise relates to a self-actuated yarn clamping device installed in the underwinding region of the spindle of a spinning or twisting machine, these yarn clamping devices being Although it is not necessary to attach an underwinding material to the winding part of the spindle, in these patent documents as well, how to deal with the case where the yarn clamping device is contaminated with yarn residue contrary to expectations. Is not described at all.

  The yarn clamping device described in DE 102006022484 is arranged in the upper part of the spindle of a spinning or twisting machine spindle as usual, and has a first clamping element fixed in position and , A second clamping element that is supported so as to be movable in the axial direction and can be crimped to the first clamping element fixed in position by a spring force, and a centrifugal force element. In other words, the yarn clamping device has accommodating portions on the side opposite to the first clamping element, and the centrifugal force element is disposed in these accommodating portions. Further, a compression spring is disposed between the housing portion and the contact surface of the second clamp element.

  The yarn clamping device described in DE 102008058655 is essentially a development of the yarn clamping device described above.

  This improved thread clamping device has a plurality of radially extending half shells, in which the centrifugal elements are arranged and guided. At this time, one half of the half shell is disposed on the second clamp element that is movably supported, and the other half of the corresponding half shell is a base element that is disposed in a fixed position. Is arranged.

  In addition, each movable second half of the clamping element half shell is provided with a guide (Kulisse) inclined relative to the horizontal, and each corresponding half half shell of the base element is provided with a horizontal guide. Yes.

  Further, the guide of the second half of the movable clamp element, which is inclined with respect to the horizontal, is arranged in the direction of the longitudinal axis of the upper part of the spindle starting from the half shell of the movable clamp element. The clamp element is movable so as to have an inclination angle different from that in the direction of the half shell.

  The yarn clamping device described in EP 2530041 also has a first clamping element fixed in position and a second clamping movably supported relative to the first clamping element as usual. The second clamp element is pressed toward the first clamp element by a pressing element formed as a coil spring.

  In this case as well, load relief elements formed as balls are provided, these load relief elements press the second clamping element based on the centrifugal force, and the yarn clamping device has a specific spindle speed. When it exceeds, it is released and works to release the thread.

  As already suggested above, these known thread clamping devices have been found to be good to some extent in practice, however, all are extremely difficult to clean when needed. Has the disadvantages.

  The problem underlying the present invention is to improve the thread clamping device starting from a thread clamping device of the type described above so that it can be cleaned without problems when necessary. .

  In the yarn clamping device according to the present invention that solves this problem, the yarn clamping device has an underwinding pipe that is fixedly arranged on the upper part of the spindle, and the underwinding pipe is movably supported by a second one. And a guide device which, together with a corresponding guide addition in the clamping element, forms a mechanical locking device for the second clamping element.

  Preferred embodiments of the thread clamping device according to the invention are the subject of the dependent claims.

  The configuration according to the present invention of the yarn clamping device has the following advantages over the known yarn clamping device. That is, in the yarn clamping device according to the present invention, the second clamping element is movably supported by the use of a mechanical locking device when necessary, that is, when the yarn clamping device is soiled by yarn residue. Can be reliably positioned at the cleaning position, and the yarn clamping device can be relatively easily cleaned at the cleaning position.

  In this case, in a preferred embodiment, the locking device can be positioned in the cleaning position without problems when the second clamp element movably supported is required, and the second movably supported in the cleaning position. The clamp elements are fixed so as to be spaced from the fixed first clamp elements. That is, when the spindle is stopped, the second clamping element can be manually operated without problems so that the area between the two clamping elements is freely accessible, and thus the entire thread clamping device can be easily and thoroughly cleaned. Can be positioned.

  Preferably, furthermore, the locking device is formed in the form of a bayonet joint. Such a bayonet joint is a suitable quick coupling device that has been found to be good in mechanical construction to reliably join and position two cylindrical members. That is, forming the locking device as a bayonet joint means that the second clamping element is formed by axial movement of the second movably supported clamping element in the underwinding tube and subsequent rotation, for example by 90 °. Can be securely fixed at a preset position in the stationary underwinding tube.

  In this so-called cleaning position, yarn residues that are present in the region of the yarn clamping device can be removed quickly and without problems.

  In a preferred embodiment, the guide device arranged in the underwinding pipe is further formed as a guide mechanism (Kulissenfuerung). That is, the stationary underwinding pipe has a guide mechanism that forms a reliable locking device in combination with a corresponding guide addition portion in the second clamp element that is movably supported.

  Such a configuration makes it possible to easily open the thread clamping device manually, when the second clamp element, which is movably supported, is fixed in the cleaning position by being pulled down and then rotated, for example by 90 °. In this cleaning position, it is possible to remove the yarn residues that are present in some cases quickly and without problems.

  In another preferred embodiment, the guide device arranged in the underwinding tube is further formed as a guide mechanism, each of the guide mechanisms being at least one vertically extending first guide part and at least partly. And a second guide portion extending horizontally.

  The guide mechanism formed in this way is a popular gearing element that has been found to be good in mechanical construction, such a gearing element being a corresponding element, for example a so-called guide block (Kulissenstein) In combination with this, the transmission element can be reliably positioned.

  By such a guide mechanism, a relatively complicated motion trajectory and a relatively simple motion trajectory as in this embodiment can be realized.

  That is, the guide mechanism in the underwinding tube, in combination with the corresponding guide addition portion in the second clamp element supported movably, forms a simple and reliable switching and locking device. The stop device enables the second clamp element, which is movably supported, to be securely fixed in a preset cleaning position.

  Preferably, the underwinding tube has at least two guide devices formed as a guide mechanism. However, it is not always necessary to limit the number of guide mechanisms.

  That is, instead of two guide mechanisms arranged 180 ° apart, the underwinding pipe has, for example, three guide mechanisms arranged 120 ° apart or four guide mechanisms arranged 90 ° apart. It may be.

  Further details of the present invention will now be described in detail using the embodiments shown in the drawings.

The yarn clamping device according to the invention, which is arranged in the upper part of the spindle of the spindle, during the spinning end process, i.e. the yarn clamping device is closed and the yarn is fixed between the clamping elements of the yarn clamping device It is a figure shown in a state. 1 shows a thread clamping device according to the invention in a cleaning position, i.e. in a state in which a second clamp element movably supported is located at a relatively large distance from a stationary first clamp element. FIG. It is a figure which decomposes | disassembles and shows the thread | yarn clamp apparatus which concerns on this invention.

  As is well known, a ring spinning machine or twisting machine is usually a so-called spinning machine in a plurality of identical working locations, which are arranged at relatively short intervals in the machine long side region of a textile machine. Unit 1 is included. Each of these spinning units 1 has a drivable spindle 2 that is rotatably supported, each of which is determined by a yarn 13 fed from a draft device arranged upstream. It works to give the yarn twist and wind it onto the spinning tube 6. At this time, the spindle 2 of the ring spinning machine or the twisting machine is usually driven by an individual motor, or, as in this embodiment, a circulating drive belt 11 (so-called envelope driving device) that applies force to the warb 12 of the spindle 2. (Huelltrieb)).

  As shown in FIG. 1, each of the spindles 2 has a spindle upper portion 3 that is rotatably supported and a bearing housing 4 that does not rotate. (Not shown).

  At this time, the spindle upper portion 3 has a so-called spindle shaft 5, which is rotatably supported by the bearing housing 4 using a base bearing and a neck bearing, as is well known.

  The upper part 3 of the spindle is further provided with coupling means (not shown) in its upper region, and these coupling means accommodate the spinning winding pipe 6 in which the spun yarn 13 is taken up by the spinning cup 7. Used to do.

  The winding process is performed in a known manner by a so-called traverse reciprocating motion of the ring rail 8, and the ring rail 8 extends over a plurality of spinning units 1 arranged side by side on the machine long side.

  As further shown in FIG. 1, a stationary spinning ring 9 is installed in the area of each spindle 2 on the ring rail 8, and a so-called ring traveler 10 circulates along the spinning ring 9 in a known manner, The ring traveler 10 is driven by a traveling yarn 13 connected to the rotating spindle 2 via the spinning winding tube 6 during the winding process.

  Each of the spindles 2 of the spinning machine or the twisting machine is further provided with a yarn clamping device 14 according to the present invention, and this yarn clamping device 14 is used when exchanging the spinning winding tube. That is, the yarn clamping device 14 is necessary when the spinning cup 7 of the spindle 2 is completed and pulled up from the spindle 2 together and replaced with a new spinning winding tube 6.

  As can be seen particularly well from FIG. 3, in this embodiment the thread clamping device 14 comprises a stationary first clamping element 15 fixed to the spindle upper part 3 of the spindle 2 as well as the spindle as the main component. An unwinding tube (Unterwindehuelse) 16 fixed to the upper part 3, a spring element 17 connectable to the underwinding tube 16, for example a leaf spring element, and a spring element 17 that is movably supported and functionally mounted. A second clamping element 18 connected to the so-called slide sleeve.

  The yarn clamping device 14 further includes a cover element 19 and a bottom portion 21 fixed to the spindle upper portion 3, and the cover element 19 and the bottom portion 21 are threaded during the spinning operation. It serves to protect the 14 leaf spring elements 17 against contamination from below.

  As can be further seen from the drawing, the underwinding pipe 16 is configured to include at least two support portions 24 for the spring element 17 and a receiving portion 27 for the centrifugal force element 26 connected to the spring element 17. ing.

  The spring element 17 is fixed to the support portion 24 of the underwinding pipe 16 in the attached state in a radial direction and an axial direction by using a pin-like additional portion 25 extending inward, and is limited and movable. It is supported.

  Further, as already suggested, centrifugal elements 26 are fixed to the spring elements 17 by, for example, screw coupling or clip coupling, and these centrifugal elements 26 are based on the bending stress of the spring element 17 which has been bent in advance. It is directed inward. That is, as shown in FIG. 1, for example, the centrifugal force element 26 is inwardly swung into the accommodating portion 27 of the underwinding pipe 16 in the mounted state and as long as the spindle 2 does not exceed the determined spindle rotation speed. .

  Furthermore, the underwinding pipe 16 has several at least two guide mechanisms 22 in its upper region, which guide mechanisms 22 are in the second clamp element 18 that is movably supported in the mounted state. A locking device is formed corresponding to the corresponding guide addition portion 23.

  That is, the guide mechanism 22 of the underwinding pipe 16 is coupled with the guide addition portion 23 of the second clamp element 18 that is movably supported, so that the clamp element 18 is positioned at the cleaning position RS as shown in FIG. In this cleaning position RS, the clamping elements 15, 18 are clearly spaced from one another.

  In order to obtain such a cleaning position RS in which the second clamp element 18 movably supported is positioned with a relatively large distance b with respect to the first clamp element 15 arranged in a stationary manner. When the spindle 2 is stopped, the second clamping element 18 must first be moved downward in the direction M manually and then rotated somewhat, for example by 90 °.

  In the case of such a procedure, the guide mechanism 22 disposed in the underwinding pipe 16 is coupled with the guide addition portion 23 disposed in the second clamp element 18 that is movably supported, and thus the second clamp element. 18 at the cleaning position RS, in which the second clamping element 18 is located at a large distance from the stationary first clamping element 15 and correspondingly the thread. The clamping device 14 can be cleaned without problems.

  The thread clamping device 14 remains in this cleaning position RS until this cleaning position RS is again released by a corresponding manual operation of the second clamping element 18.

Claims (6)

A yarn clamping device (14) for a spindle (2) of a spinning machine or a twisting machine, the first clamping element (15) being fixedly arranged on the upper part (3) of the spindle, and the first clamping element The second clamp element (18) supported so as to be axially movable relative to (15), and the second clamp element (18) based on the spring force, the first clamp element (15) And a load removing device for positioning the second clamp element (18) at an interval with respect to the first clamp element (15) based on centrifugal force. In the thread clamp device,
The thread clamp device (14) has an underwinding pipe (16) disposed in a stationary manner on the spindle upper part (3), and the underwinding pipe (16) is a movably supported first A guide device (22) which, together with a corresponding guide addition (23) in the two clamp elements (18), forms a mechanical locking device for the second clamp element (18). A thread clamping device (14), characterized in that   The locking device can be positioned at the cleaning position (RS) without any problem when the second clamp element (18) supported in a movable manner is necessary, and the second clamp at the cleaning position (RS). The thread clamping device (14) according to claim 1, wherein the element (18) is formed to be fixed at a distance from the stationary first clamping element (15).   The thread clamping device (14) according to claim 1 or 2, wherein the locking device is formed in the form of a bayonet joint.   The yarn clamping device (14) according to any one of claims 1 to 3, wherein the guide device (22) arranged in the underwinding pipe (16) is formed as a guide mechanism.   The yarn clamping device (14) according to claim 4, wherein each guide mechanism comprises at least one vertically extending first guide portion and at least partially horizontally extending second guide portion.   The yarn clamping device (14) according to claim 1, wherein the underwinding tube (16) has at least two guide devices (22) formed as a guide mechanism.