JP2018080059A - Yarn guide pulley for mechanical yarn storage device provided in traversing triangle area at work station of textile machine that manufactures cross wound package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn guide pulley for a mechanical yarn storage device placed in the traversing triangle area at the work station of a textile machine for manufacturing a cross wound package for compensating changes in yarn winding speed caused by traversing when winding the cross wound package.SOLUTION: A yarn guide pulley (39) has a yarn running surface (7) with a U-shaped yarn guide groove (32) formed therein.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a machine disposed in a traversing triangle area in a workstation of a textile machine for producing a cross-wound package, in order to correct a change in the yarn-wounding speed caused by the traverse in the winding of the cross-wound package. This is related to the thread guide pulley for type thread storage device.

  Designed as an open-end rotor spinning machine, the textile machine workstation for producing cross-wound packages, as is known, has an open-end spinning device that produces yarn at a constant supply speed, and the produced yarn. It is equipped with a winding device that traverses the package so that it becomes a cross-wound package, and a yarn storage device that compensates for fluctuations in the yarn winding speed and tension generated by traversing.

  In this connection, in the construction of textile machines, pneumatic and mechanically operated yarn storage devices are known, but mechanical yarn storage devices differ in part in their form.

  Mechanical yarn storage devices can be activated by definition, for example, and can employ relatively complex control measures. However, a mechanical yarn storage device only has a spring element that is deflected by the yarn in response to changes in the yarn winding speed.

  Controllable mechanical yarn accumulators are usually used in conical cross-wound packages, for example as described in DE 24 54 917 C2. That is, due to such a yarn storage device, a variation in the partly very large yarn winding speed that occurs when winding a conical cross-winding package is a constant yarn of the open-end rotor spinning device. It is corrected for the supply speed.

  These known yarn storage devices are usually equipped with three yarn guide pulleys each arranged in the yarn path, two of which are fixedly arranged and the third pulley is movable It is attached to the swivel lever. That is, the third yarn guide pulley moves as needed during the spinning process, temporarily extending the length of the normal yarn path.

  The rotation axis of the yarn guide pulley of this known yarn storage device is arranged perpendicular to the traverse surface of the yarn to be scraped off, and has a V-shaped yarn guide groove on its running surface. The

For example, DE 28 03 378 C2 describes a mechanical yarn storage device that compensates for changes in the yarn winding speed caused by traversing with a leaf spring element.
In particular, this known yarn storage device employed in a cylindrical cross-wound package is each equipped with a leaf spring element, and a thread guide pulley arranged in the path of the thread to be wound is fixed at the end thereof. It has been.

For example, in the yarn storage device described in DE 28 03 378 C2, a leaf spring is proposed in which two steel clamps are used as holders and are fixed to a frame of a fiber device and connected to a yarn guide pulley via a roller carrier. The
In addition, in the middle between the holder and the roller carrier, the leaf spring is integrated into a rubber element to prevent uncontrolled vibrations.
Also in these mechanical yarn storage devices, the rotation axis of the yarn guide pulley is arranged perpendicular to the traversing surface of the yarn to be scraped, but DE 28 03 378 C2 has a thread guide pulley running surface. The design is not described.

In addition, DE 10 2009 021 066 A1 describes a workstation for an open-end rotor spinning machine, which is likewise equipped with a mechanical yarn storage device.
This known yarn storage device is also equipped with three yarn guide pulleys arranged in the yarn path area.
Two of the thread guide pulleys are fixed, for example, installed in the housing of the paraffin processing machine, and the third pulley that supports the leaf spring is mounted on the swivel lever as a movable type.
In this known yarn storage device, the rotation axis of the yarn guide pulley is parallel to the traversing surface of the yarn to be scraped in order to facilitate threading to the yarn storage device after yarn breakage. .
The running surface of the thread guide pulley is a V-shaped thread guide groove.

  This known mechanical yarn storage device can be employed in cross-wound packages, for example colored packages, which have a relatively low yarn tension, and also in so-called rovings, where the yarn tension in the winding process is much higher. The

  However, in reality, in the yarn accumulating device configured as described above, the yarn is traversed in the lateral direction with respect to the traveling direction in the region of the yarn guide pulley on the outlet side of the yarn accumulating device by the traverse guide when the yarn is wound up. I understood that it is affected by. In other words, with such a yarn storage device, there is a risk that the yarn in the V-shaped yarn guide groove will shift greatly in the lateral direction due to traversing or come out of the V-shaped yarn guide groove of the outlet side yarn guide pulley.

  In such a case, the yarn to be scraped is not correctly guided in the yarn guide groove of the yarn guide pulley at the outlet side of the yarn storage device, and in many cases, the yarn comes into contact with adjacent parts, and these parts Will be damaged over time and must be replaced.

  Starting from the current state-of-the-art technology described above, the problem of the present invention is that the rotation axis of the yarn guide pulley is arranged parallel to the traversing surface of the yarn, and the yarn to be wound is affected by the lateral force However, we are developing a mechanical yarn storage device in which the traversed yarn is reliably guided in the yarn guide groove of the yarn guide pulley.

  According to the present invention, this problem can be solved by a yarn guide pulley having a yarn traveling surface in which a yarn guide groove designed in a U shape is incorporated.

  Further advantageous embodiments of the invention are the subject matter of the dependent claims.

The thread guide pulley according to the present invention has an advantage that the thread guide groove of such a form reliably guides the thread that passes even during traversing. In other words, even under the influence of the lateral force caused by traversing by the U-shaped yarn guide groove by the U-shaped yarn guide groove,
This prevents the thread that passes through from the thread guide groove of the thread guide pulley and hits the mounting parts of the winding device.
The configuration of the yarn guide pulley according to the present invention makes it easy for the moving yarn to easily guide the traveling yarn to the U-shaped yarn guide groove of the outlet side yarn guide pulley of the mechanical yarn storage device at all times. Can be guaranteed.

  In an advantageous embodiment, the width and depth of the U-shaped thread guide groove are designed to be equal.

  First of all, it is possible to pass the thread through the thread guide groove relatively easily after the thread breakage, and it is possible to easily realize that the thread passed through stays in the thread guide groove during the winding process. Embodiments can be achieved.

However, in other embodiments, the width and depth of the U-shaped thread guide groove can be different.
In other words, the width and depth of the yarn guide groove can be adjusted to always meet the requirements according to the yarn material used and the spinning conditions in which it is processed.

For example, in the case of difficult yarns such as yarn with long bristle feet, the width of the thread guide groove built into the thread travel surface of the thread guide pulley can be set larger than the depth.
However, the thread guide groove can also be configured so that its width is smaller than its depth.

  After all, it can be said that the advantageous form of the U-shaped thread guide groove should be determined according to the material processed by the textile machine that produces the cross-wound package, as already explained.

In an advantageous embodiment, the width of the thread guide groove incorporated in the pulley thread running surface is 3 to 8 mm.
Such a configuration ensures that the running yarn can easily and reliably fit in the yarn guide groove at any time.
That is, after the yarn breakage, a new yarn is always quickly and reliably rearranged in the region of the yarn guide pulley of the yarn storage device. It can be passed through the thread guide groove without any problem.

  The invention is explained in detail on the basis of the embodiment shown in the following figure.

The following are shown:
A mechanical yarn storage device in which the rotation axis of the pulley is arranged in front of a traverse triangle arranged in parallel to the cross section of the yarn, and the rotation axis of the yarn guide pulley is arranged in parallel to the traversing surface of the yarn. 1 is a simplified front perspective view of a workstation of an open end rotor spinning machine having BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a workstation scooping device constructed according to the present invention in an open-end rotor spinning machine having a mechanical yarn accumulating device. A yarn guide pulley of a mechanical yarn accumulating device constructed on a large scale according to the present invention in a large-scale form. Pulley of mechanical yarn storage device based on the prior art.

FIG. 1 is a very simplified front view of a textile device for producing a cross-wound package, in this example an open-end rotor spinning machine workstation 10.
As is well known, such an open-end rotor spinning machine has many workstations 10 of the same structure arranged in a row. In the workstation 10, the yarn 17 is spun from a so-called sliver stored in a spinning can (not shown) using the open-end rotor spinning device 12, and then a cross-winding package 19 is created by the winding device 18. The

  The winding device 18 of such a workstation 10 has a cross-winding package, for example for this purpose, driven by a winding frame 8, for example a separate motor, to a rotatable holder of the cross-winding package 19. The traversing device 22 having the traversing guide 1 for traversing the yarn 17 to be whispered, and the traversing drive device 23 for rotating the cross-wiring package 19 by friction are mounted. At that time, the bobbin driving device 23 has a bobbin driving roller 14 connected to a motor driving device 27.

  Each work station 10 is equipped with a yarn storage device 4 to compensate for changes in the yarn winding force and speed caused by traversing during the winding process. In the case shown, the yarn storage device 4 is designed as a mechanical yarn storage device and is placed in front of the paraffin processing device 5.

  Each individual workstation 10 of such an open-end rotor spinning machine is equipped with the various yarn handling and yarn processing equipment necessary to enable proper operation of the workstation 10.

For example, the workstation 10 is equipped with a so-called yarn monitoring device 3 and a yarn drawing device 20.
The workstation 10 is further designed, for example, to pneumatically pick up the yarn 17 picked up by the cross-winding package 19 when the yarn breaks and to feed it to the open-end rotor spinning device 12 to continue spinning. The suction nozzle 21 is installed.

  As shown in FIG. 1, the yarn drawing device 20, the suction nozzle 21, the traverse guide 1, and the winding device driving roller 14 are driven by individual driving devices 24, 25, 26, and 27, respectively. Here, the individual drive devices 24, 25, 26, 27 are connected to the workstation computer 6 via control cables 28, 29, 30, 31, respectively, and preferably this further via the bus system 7. Connected to the central control unit (not shown) of the open-end rotor spinning machine.

As can be seen from the figure, the mechanical yarn storage device 4 disposed immediately before the paraffin processing device 5 in the yarn path includes, for example, two fixed yarn guide pulleys 38 attached to the housing of the paraffin processing device 5, It has 39 housings and a thread guide pulley 36 that is affected by the thread 17 during the movable spinning process.
Here, the thread guide pulley 36 is connected via a leaf spring element 34 to a movable adjustment lever 35 that can be rotated within a certain range by a driving means such as a thrust piston transmission 37. That is, the adjusting lever 35 and the yarn guide pulley 36 of the yarn accumulating device 4 can be arranged at the yarn splicing position (not shown) or the operation position I shown in FIG.

  FIG. 2 is a front view of the scraping device 18 of the workstation 10 of the open-end spinning machine shown very simplified in FIG.

  As can be seen from the drawing, the yarn 17 generated by the open-end spinning device 12 and supplied from the yarn drawing device 20 in the yarn feeding direction F at a constant speed is firstly arranged in the path to the cross-winding package 19. 4. Next, slide on the paraffin 11 of the paraffin processing unit 5.

  Such a paraffin processing apparatus 5 has already been known as various embodiments for a long time, and a detailed description of their structure and function is omitted here.

  Following the paraffin processing device 5, the yarn 17 whose direction is adjusted by the traverse guide 1 slides on the yarn guide 2 and is scraped off by a cross-winding package 19 that rotates by friction from the package driving roller 14.

  As can be seen from the figure, the mechanical yarn storage device 4 is connected to the adjusting lever 35 via two fixed yarn guide pulleys 38 and 39 and a leaf spring element 34 attached to the housing of the paraffin processing device. The movable thread guide pulley 36 is installed.

  Here, the fixed yarn guide pulley 38 serves as an inlet side component of the yarn storage device 4, and the fixed yarn guide pulley 39 similarly functions as an outlet side component of the yarn storage device 4, and at the same time, the vertex of the so-called traverse triangle 9. It will also be. That is, the yarn 17 is alternately moved between the ends of the cross-winding package 19 by the traverse guide 1 when the yarn 17 is wound on the cross-winding package 19, thereby traversing the triangle 9 as shown in FIG. Is formed.

At that time, the traverse triangle 9 has the yarn guide pulley 39 as its starting point and the point where the yarn 17 is scraped off by the cross-winding package 19 as its end point.
As can be easily imagined, the traverse of the yarn 17 causes a continuous change in the distance between the yarn guide pulley 39 and the location of the yarn 17 in the cross-winding package 19, resulting in the yarn tension. And the yarn winding speed changes constantly.
This change in the yarn take-up speed is compensated by the yarn guide pulley 36 of the yarn storage device 4 because the yarn guide pulley 36 is shifted forward or backward, thereby compensating the yarn take-up speed. .

  Since the yarn guide pulleys 38 and 36 do not receive a lateral force from the passing yarn 17 during spinning, and only a yarn force orthogonal to the rotary shafts 15 and 16 is applied, the yarn traveling surfaces designed in a V-shape respectively. Have That is, in the thread guide pulleys 38 and 36, the thread 17 is guided by a groove designed in a V shape.

  As already described, the yarn guide pulley 39 is the apex of the traverse triangle 9, and the moving yarn 17 is not only subjected to the force by the yarn perpendicular to the rotary shaft 13, but is also removed from the cross-wound package 19. Sometimes lateral force generated by traversing the thread 17 is applied. That is, the yarn 17 traversed by the traverse guide 1 during spinning tends to move alternately from the center of the yarn guide pulley 39 to the left or right. At this time, for example, the yarn 17 comes off from the yarn guide pulley 39 side. Or an adjacent part.

  In order to reliably guide the yarn 17 in the region of the yarn guide pulley 39 of the yarn storage device 4, the yarn guide pulley 39 has a yarn guide groove 32 designed in a U shape according to the present invention. Is provided.

  That is, the yarn guide pulley 39 is formed with a side edge that stands perpendicular to the upper portion of the yarn guide groove 32, so that the yarn 17 that passes through is disengaged from the yarn guide groove 32 of the yarn guide pulley 39 during traverse, Prevents hitting adjacent parts.

Figure 4 shows a thread guide pulley 40 that is traditionally built into a mechanical thread storage device, but sensitive to the lateral force of the thread. In other words, Figure 4 shows a thread guide pulley based on the current state of the art.
As shown in the drawing, the yarn guide pulley 40 whose rotation axis is indicated by 41 has a V-shaped yarn running surface through which the yarn 17 passes through the deepest region during the spinning process.
As can be easily imagined, with such a thread guide pulley 40, there is always a risk that the thread 17 will be displaced laterally or disengaged from the V-shaped thread running surface when a lateral force is applied.

FIG. 3 shows in detail a thread guide pulley 39 of the form according to the invention.
As can be seen from the figure, with the yarn guide pulley 39, the rotary shaft 13 and the yarn running surface 7 parallel to the rotary shaft 13 can be confirmed.
A U-shaped thread guide groove 32 is formed on the thread running surface 7, and as shown, the thread 17 is reliably guided at the bottom.
At that time, the width B and depth T of the yarn guide groove 32 can be set differently depending on, for example, the material to be scraped off and the spinning conditions in which it is processed.
For example, the thread guide groove 32 can be designed so that the width B and the depth T of the thread guide groove 32 are the same.

  However, in another embodiment, the width B and the depth T of the U-shaped thread guide groove 32 can be designed differently. In other words, the width B of the U-shaped thread guide groove 32 may be set larger or smaller than the depth T of the thread guide groove.

Functions of the device according to the invention:
During the spinning or winding process, the yarn 17 produced by the open-end rotor spinning device 12 is pulled out from the open-end rotor spinning device 12 by the yarn drawing device 20 at a constant yarn feed speed, and further to the winding device 18. It is transported and completed there as a cylindrical cross-fired package 19. At that time, the cross-winding package 19 is rotatably attached to the winder frame 8 and its surface is in contact with a winder driving roller 14 that can be driven individually and rotates at a constant speed. Drives the cross-fired package 19.
That is, when the yarn 17 produced by the open-end rotor spinning device 12 reaches the region of the scooping device 18, the traversing guide 1 of the traversing device 22 causes the yarn 17 to be scooped off as a crossing surface of the cross-winding package 19. Will be traversed.

If a change in the yarn winding speed based on traversing continuously occurs during the winding process, the yarn 17 provided at a constant yarn feeding speed by the yarn drawing device 20 is passed through the paraffin processing device 5. Then, it passes through the mechanical yarn storage device 4 where the changes in the yarn winding speed are compensated.
The mechanical yarn storage device 4 is equipped with a fixed inlet-side yarn guide pulley 38, a movable yarn guide pulley 36 disposed on the leaf spring element 34, and a fixed outlet-side yarn guide pulley 39.

  As shown in FIGS. 1 and 2, the thread guide pulley 36 is connected to a pivotable adjustment lever via a leaf spring element 34, and is arranged in the path of the thread 17 in its operating position I. At this time, the passing thread 17 is slightly deflected by the thread guide pulley 36, and the thread 17 is adjusted according to the tension of the thread by the spring force of the leaf spring element 34.

  Since the yarn 17 is always perpendicular to the rotary shafts 15 and 16 of the yarn guide pulleys 38 and 36 in the region of the yarn guide pulleys 38 and 36 during the winding process, no lateral force is generated. The guide pulleys 38 and 36 have a V-shaped design yarn running surface, and the yarn 17 passing through the area of the yarn guide pulleys 38 and 36 is guided relatively reliably.

  However, in the area of the yarn guide pulley 39 on the outlet side of the yarn storage device 4, proper yarn guidance is much more difficult. This is because the yarn 17 wound by the cross-wound package 19 and traversed by the traverse guide 1 is subjected to a significant lateral force on the yarn traveling surface of the yarn guide pulley 39.

In order to ensure that the yarn 17 to be spun off is always guided on the yarn traveling surface in the region of the yarn guide pulley 39 on the exit side, which is also the starting point of the traverse triangle 9, as is known, The yarn running surface 7 has a U-shaped yarn guide groove 32 shape.
The vertically standing edge of the U-shaped thread guide groove 32 prevents the passing thread 17 from coming off the thread travel surface of the thread guide pulley 39 due to the influence of the lateral force and reaching the adjacent parts.
The mechanical yarn storage device 4 automatically compensates for changes in the yarn winding speed caused by traversing during the winding process by corresponding movements of the yarn guide pulley 36 arranged at the end of the leaf spring element 34. In addition, the tension of the yarn 17 that is scraped off by the cross-wound package 19 is kept almost constant. That is, the mechanical yarn accumulating device 4 maintains a substantially constant winding condition, and in the case of traversing toward the end of the cross-winding package 19, the yarn tension increases due to an increase in the winding speed of the yarn 17. In the case of traversing toward the center of the cross-winding package 19, the yarn tension is also prevented from decreasing due to the decrease in the yarn 17 winding speed.

Claims (6)

In the region of the traversing triangle (9) in the work station (10) of the textile machine for manufacturing the cross-wound package, which compensates for the change in the yarn winding speed generated by traversing when the cross-wound package (19) is wound. A yarn guide pulley (39) used in the mechanical yarn storage device (4) arranged,
The thread guide pulley (39) has a thread running surface (7) with a thread guide groove (32) formed in a U-shape.   The yarn guide pulley (39) according to claim 1, wherein the U-shaped yarn guide groove (32) is configured such that the width (B) and the depth (T) are equal.   The thread guide pulley (39) according to claim 1, wherein the U-shaped thread guide groove (32) has a different width (B) and depth (T).   The yarn guide pulley (39) according to claim 3, wherein the width (B) of the yarn guide groove (32) is greater than the depth (T) of the yarn guide groove (32).   The yarn guide pulley (39) according to claim 3, wherein the width (B) of the yarn guide groove (32) is smaller than the depth (T) of the yarn guide groove (32).   The yarn guide pulley (39) according to claim 1, wherein the width (B) of the yarn guide groove (32) is 3 to 8 mm.

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