JP3965832B2 - Spinning winder and thread switching method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spinning winder that switches an elastic yarn from a full bobbin to an empty bobbin, and a yarn switching method thereof.
[0002]
[Prior art]
A conventional spinning winder is described in JP-A-10-167573. In this spinning winder, the elastic yarn from the yarn supply side is wound around the bobbin at the winding position to form a fully wound bobbin, and the empty bobbin at the standby position is placed on the yarn supplying side from the fully wound bobbin. The yarn is switched from a full bobbin to an empty bobbin by contacting with. In the yarn switching operation, the elastic yarn between the empty bobbin and the full bobbin is positioned at one end of the full bobbin so that it is wound around one end of the full bobbin and one end of the empty bobbin.
[0003]
[Problems to be solved by the invention]
In the conventional spinning winder, the elastic yarn is wound around the end of the full bobbin and one end of the empty bobbin when the yarn is switched. The end is overlapped.
Accordingly, when the elastic yarn is unwound from the fully wound bobbin in a later step, it is difficult to take out the winding end yarn end.
[0004]
An object of the present invention is to provide a spinning winder that can easily unwind the elastic yarn of a full bobbin by eliminating the overlap between the winding start yarn end and the winding end yarn end.
[0005]
[Means for Solving the Problems]
In the spinning winder and the yarn switching method of the present invention, the yarn switching guide and the winding end yarn end guide are moved around the outer periphery of the empty bobbin, so that the elastic yarn between the empty bobbin and the fully wound hobbin is moved. The positioning is performed at a position different from one end portion outside the winding width of the full bobbin and one end portion of the full bobbin.
As a result, when the elastic yarn is wound around the bobbin, it can be wound at different positions without overlapping the winding start yarn end and the winding end yarn end.
The yarn switching guide captures the elastic yarn between the empty bobbin and the full bobbin, positions it at a position different from one end outside the winding width of the full bobbin, winds it around the empty bobbin, The elastic yarn between the bobbin and the contact roller is also captured. In addition, the elastic yarn is guided to the one end of the full bobbin by the winding end yarn end guide, and the elastic yarn is fed from the end of the winding width. When the falling end face is dropped and positioned at the one end , the elastic yarn is dropped from the package surface of the full bobbin to the one end of the bobbin, and the tension is reduced. By using the decrease in tension to loosen the elastic yarn, it is possible to assist in winding the empty bobbin.
[0006]
Further, in the spinning winder of the present invention, the yarn switching guide is allowed to enter between the empty bobbin and the full bobbin and can be moved around the outer periphery of the empty bobbin, and the winding end yarn end guide is used as the yarn switching guide. It is attached to.
Accordingly, by moving only the yarn switching guide, the winding end yarn end guide can also be moved, and the structure can be simplified.
[0007]
Further, the winding end yarn end guide of the spinning winder of the present invention has an inclined surface that slides and guides the elastic yarn to one end of the full bobbin while moving around the outer periphery of the empty bobbin. is there.
Thereby, when the elastic yarn is slidably guided to one end of the full bobbin, it can be smoothly performed by the inclined surface.
[0008]
The spinning winder of the present invention and the yarn switching method thereof will be described with reference to the drawings.
[0009]
A spinning winder 1 shown in FIG. 1 is a turret type that winds an elastic yarn Y (stretchable yarn) from the yarn supply side as a package P, and includes a turret 3 and two bobbin holders 4 and 5. , A lifting box 6 and a thread switching device 7 are provided.
The turret 3 is pivotally supported on the turret shaft 8 of the body frame 2. The turret 3 is rotationally controlled by a drive source (not shown) such as an induction motor connected to the turret shaft 8.
[0010]
The two bobbin holders 4 and 5 are pivotally supported (cantilevered) by the turret 3 and extend to the opposite side of the body frame 2. The bobbin holders 4 and 5 are respectively positioned at a winding position M and a standby position T around the turret shaft 8 and are rotationally controlled by a drive source (not shown) such as an induction motor. The winding position M and the standby position T are set around the turret shaft 8 at an angle of 180 degrees, and the elastic yarn Y is wound as a package P at the winding position M. Each bobbin holder 4 and 5 is usually provided with a plurality of bobbins for winding the elastic yarn Y as a package P. In FIG. 1, one bobbin is disposed at the winding position M and the standby position T, respectively. For convenience of explanation, the bobbin wound as a package P is expressed as a full bobbin Bf and an empty bobbin as B.
These bobbin holders 4 and 5 are switched from the winding position M to the standby position T or from the standby position T to the winding position M by controlling the rotation of the turret 3. Each of the bobbin holders 4 and 5 rotates the turret 3 as shown in FIG. 4C when the elastic yarn Y is switched from the full bobbin Bf wound at the winding position M to the empty bobbin B at the standby position T. By controlling, it is positioned at the thread switching position K. The yarn switching position K is set at an intermediate position between the winding position M and the standby position T. At the yarn switching position K, the empty bobbin B at the standby position T is pressed against the elastic yarn Y on the yarn supply side from the full bobbin Bf (package P), and comes into contact (adhesion) with the elastic yarn Y. It is in a state.
[0011]
The elevating box 6 is provided on the body frame 2 so as to be movable up and down above the winding position M. The elevating box 6 includes a contact roller 9 and a traverse device 10. The contact roller 9 is brought into contact with the empty bobbin B (package P) at the winding position M, and is rotationally controlled by a drive source (not shown) such as an induction motor. The drabber device 10 includes a traverse guide 11. The traverse guide 11 traverses the elastic yarn Y toward the empty bobbin B (package P) at the winding position M by guiding the elastic yarn Y on the yarn supply side and strokes (reciprocates) the traverse width. .
[0012]
The thread switching device 7 is provided at a thread switching position K counterclockwise from the winding position M, and includes a thread switching guide 15 and a winding end thread end guide 16. The thread switching guide 15 extends from the tip of each bobbin holder 4, 5 to the vicinity of the turret 3 and is pivotally supported (cantilevered) on the guide shaft 17 of the machine body frame 2. A plurality of winding end yarn end guides 16 are mounted on the yarn switching guide 15 corresponding to the number of empty bobbins B of the bobbin holders 4 and 5.
[0013]
These guides 15 and 16 capture and guide the elastic yarn Y as shown in FIGS. 2 and 3 when the bobbin holders 4 and 5 are positioned at the yarn switching position K as shown in FIG. 4C. It is.
[0014]
2, 3, and 5, the yarn switching guide 15 is rotated between the guide bobbin B and the full bobbin Bf by rotating about the guide shaft 17, and is turned around the outer periphery of the empty bobbin B. The The yarn switching guide 15 is formed with a plurality of guide grooves 18 corresponding to the number of empty bobbins B of the bobbin holder 5. Each guide groove 18 is formed so as to be located in the width center portion 19 of each empty bobbin B.
[0015]
The yarn switching guide 15 is brought into contact with the elastic yarn Ya between the empty bobbin B and the full bobbin Bf by rotation toward the empty bobbin B, and guides and captures the traversed elastic yarn Ya in the guide groove 18. . Thus, the elastic yarn Ya is positioned at the width center portion 19 of the empty bobbin B by the guide groove 18.
Subsequently, the yarn switching guide 15 captures the elastic yarn Ya, and then captures the elastic yarn Yb between the empty bobbin B and the contact roller 9 (yarn supply side). As a result, the elastic yarn Ya is wound around the elastic yarn Yb and wound around the empty bobbin B, whereby the winding start yarn end around the empty bobbin B can be wound.
[0016]
The winding end yarn end guide 16 crosses the guide groove 18 of the yarn switching guide 15 in the axial direction of the full bobbin Bf (package P), and the winding width (traverse width) of the full bobbin Bf (package P). Extends to one end away from the end. The winding end yarn end guide 16 guides the elastic yarn Ya from the full width bobbin Bf to the outside of the winding width as it enters between the empty bobbin B and the full bobbin Bf. An inclined surface 20 and a guide groove 21 for positioning the elastic yarn Ya at one end of the bobbin Bf are provided. The guide groove 21 holds the elastic yarn Ya slidably guided to one end along the inclined surface 20 at that position. The inclined surface 20 is inclined toward the lower side of the full bobbin Bf.
[0017]
The winding end yarn end guide 16 is rotated together with the yarn switching guide 15 to capture the elastic yarn Ya between the empty bobbin B and the full bobbin Bf (package P) on the inclined surface 20.
Subsequently, the winding end yarn end guide 16 moves the elastic yarn Ya around the outer periphery of the empty bobbin B as the yarn switching guide 15 turns, so that the full winding bobbin Bf (package) is formed along the inclined surface 20. Guide outside the winding width of P).
At this time, the elastic yarn Ya is smoothly guided outside the winding width of the full bobbin Bf by the inclined surface 20 and guided into the guide groove 21. As a result, the elastic yarn Ya falls off from the winding end of the full bobbin Bf (package P) to one end of the full bobbin Bf without suddenly braking the full bobbin Bf. Thus, the winding end yarn end can be wound around one end portion of the full bobbin Bf. When the end face of the elastic yarn Ya falls, the package P is wound from the fast peripheral speed of the package P to the slow peripheral speed of the full bobbin Bf, and the tension of the elastic yarn Ya is greatly reduced instantaneously. Thus, the elastic yarn Ya having elasticity can be loosened without applying a sudden brake to the full bobbin Bf, and the elastic bobbin B is wound with the elastic yarns Ya and Yb sufficiently in contact with the empty bobbin B. It becomes possible.
[0018]
Next, a yarn switching method in the spinning winder will be described with reference to FIGS.
[0019]
Winding of the elastic yarn Y by the spinning winder 1 is started. In the winding operation, the bobbin holder 4 at the winding position M is rotated, and the contact roller 9 is pressed against each empty bobbin B to rotate. In this state, the traverse device 10 traverses the elastic yarn Y to wind it up as a package P on each bobbin B [see FIG. 4 (a)].
[0020]
When the package P at the winding position M is fully wound, the thread switching operation is started.
In the thread switching operation, the turret 3 is rotated counterclockwise so that the full bobbin Bf (bobbin holder 4) wound around the package P is switched to the standby position T and the empty bobbin B (bobbin holder 5) is switched to the winding position M. Then, the empty bobbin B is brought into contact with the elastic yarn Y on the yarn supply side from the package P. Further, the bobbin holder 5 is rotated [see FIG. 4B].
In this state, the fully wound bobbin Bf (bobbin holder 4) and the empty bobbin B (bobbin holder 5) are positioned at the thread switching position K by rotating the turret 3 counterclockwise. At this time, the empty bobbin B is pressed against the elastic yarn Y on the yarn supply side from the package P and brought into contact (adhesion) with the elastic yarn Y. The elastic yarn Y is traversed and wound around the package P in contact with the empty bobbin B (see FIG. 4C).
[0021]
When the bobbin holders 4 and 5 are positioned at the yarn switching position K, the yarn switching device 7 (the guides 15 and 16) is rotated between the empty bobbin B and the full bobbin Bf (package P). Thus, the yarn switching guide 15 is brought into contact with the elastic yarn Ya between the empty bobbin B and the full bobbin Bf, and guides and catches the elastic yarn Ya in the guide groove 18 in the traverse process, thereby elastic yarn Ya. Is positioned at the center 19 of the width of the empty bobbin B (see FIGS. 5A and 5B).
[0022]
Subsequently, when the yarn switching guide 15 is turned around the outer periphery of the empty bobbin B, the elastic yarn Ya comes into contact with the winding end yarn end guide 16 while being caught in the guide groove 19. Thus, the elastic yarn Ya is moved around the outer periphery of the empty bobbin B as the yarn switching guide 15 turns, so that the winding of the package P along the inclined surface 20 of the winding end yarn end guide 16 is performed. It is guided to slide toward the end of the width (traverse width). At this time, the elastic yarn Ya is smoothly guided by the inclined surface 20 inclined toward the lower side of the package P. As a result, a winding end bunch is formed at one end of the full bobbin Bf (see FIGS. 5C and 5D).
[0023]
Then, when the elastic yarn Ya reaches the winding end of the full bobbin Bf (package P) in the state of being guided by the winding end yarn end guide 16, one end of the full bobbin Bf is formed from the surface of the package P. The end face falls, falling to the part. Before and after the end face drop, the yarn switching guide 15 reaches the elastic yarn Yb between the empty bobbin B and the contact roller 9 (yarn supply side), and guides and catches the elastic yarn Yb in the guide groove 18. The elastic yarn Ya guided by the winding end yarn end guide 16 is also guided into the guide groove 21 and positioned at one end portion of the full bobbin Bf (see FIGS. 5E and 5F).
When the elastic yarn Ya is captured by the guide groove 21 of the winding end yarn end guide 16, the elastic yarn Ya (winding end yarn end) is wound around one end of the full bobbin Bf.
[0024]
Further, due to the fall of the end face of the elastic yarn Ya, the tension of the elastic yarn Ya is reduced due to the difference between the peripheral speed of the package P and the peripheral speed of the full bobbin Bf. Due to this decrease in tension, the elastic yarn Ya is loosened. The elastic yarn Ya sufficiently comes into contact with the elastic yarn Yb captured by the yarn switching guide 15 and is wound around the entire circumference of the empty bobbin B. At this time, the elastic yarn Ya is pulled by winding the elastic yarns Ya and Yb around the empty bobbin B, and is cut between the empty bobbin B and the full bobbin Bf (package P).
Then, the elastic yarn Yb (winding start yarn end) sent from the contact roller 9 is wound around the width center portion 19 of the empty bobbin B and is cut from the package P of the full bobbin Bf, thereby performing the yarn switching operation. Complete.
[0025]
When the thread switching operation is completed, the rotation of the bobbin holder 4 is stopped, the thread switching device 7 that has entered between the empty bobbin B and the full bobbin Bf is retracted, and the turret 3 is rotated clockwise, The bobbin B is switched to the winding position M, and the full bobbin Bf (package P) is switched to the standby position M (see FIG. 4B).
Thus, the elastic yarn Y can be wound around the package P at the winding position M, and the full bobbin Bf can be taken out from the bobbin holder 4 at the standby position T. The elastic yarn Y is continuously wound around the package P by repeatedly performing the winding operation and the yarn switching operation described above.
[0026]
Thus, when winding the elastic yarn Y around the package P, the winding start yarn end is the width center portion 19 of the bobbin B, and the winding end yarn end is one end portion of the full bobbin Bf. Different positions can be obtained without overlapping the start and end of winding. Thus, when the yarn of the full bobbin Bf is unwound in the subsequent step, it can be easily performed from the end of the winding end yarn.
[0027]
Further, since the winding end yarn end guide 16 is attached to the yarn switching guide 15, both the guides 15 and 16 can be integrated between the bobbins B and Bf, and only the yarn switching guide 15 can be inserted. The thread can be switched by turning it. Therefore, the mechanism for driving the guides 15 and 16 can be simplified.
[0028]
The yarn switching position K does not necessarily need to be set at an intermediate position between the winding position M and the standby position T, and the elastic bobbin B at the standby position T is located closer to the yarn supply side than the full bobbin Bf. Any position that can contact Y is acceptable.
Further, the winding start of the elastic yarn Y is not limited to the width center portion 19 of the empty bobbin B, and may be a position different from one end portion of the full bobbin Bf.
[0029]
【The invention's effect】
In the spinning winder and the yarn switching method of the present invention, when winding an elastic yarn around a bobbin, the winding start yarn end and the winding end yarn end can be wound at different positions without overlapping. Therefore, when unwinding the yarn of the fully wound package in the subsequent process, it can be easily performed from the end of the wound yarn.
Also, since both guides are moved around the outer periphery of the empty bobbin to catch the elastic yarn, for example, a mechanism for sliding one guide in the bobbin axial direction is not required, and both guides are similar to each other around the outer periphery of the empty bobbin. What is necessary is just to move within a movement locus | trajectory, and it can be set as a simple structure. The yarn switching guide captures the elastic yarn between the empty bobbin and the full bobbin, positions it at a position different from one end outside the winding width of the full bobbin, winds it around the empty bobbin, The elastic yarn between the bobbin and the contact roller is also captured. In addition, the elastic yarn is guided to the one end of the full bobbin by the winding end yarn end guide, and the elastic yarn is fed from the end of the winding width. When the falling end face is dropped and positioned at the one end, the elastic yarn is dropped from the package surface of the full bobbin to the one end of the bobbin, and the tension is reduced. By using the decrease in tension to loosen the elastic yarn, it is possible to assist in winding the empty bobbin. Thus, the elastic yarn having elasticity can be loosened without applying a sudden brake to the full bobbin, and the elastic bobbin can be wound with the elastic bobbin sufficiently in contact with the empty bobbin.
[0030]
In the spinning winder of the present invention, the yarn switching guide can be moved between the empty bobbin and the full bobbin so that it can be moved around the outer periphery of the empty bobbin, and the winding end yarn end guide is changed over by the yarn. It is attached to the guide.
Accordingly, by moving only the yarn switching guide, the winding end yarn end guide can also be turned, and the structure can be simplified. In other words, the yarn switching guide and the winding end yarn end guide can be moved around the outer periphery of the empty bobbin by a common drive source.
[0031]
The winding end yarn end guide of the spinning winder of the present invention has an inclined surface that slides and guides the elastic yarn to one end of the full bobbin while moving around the outer periphery of the empty bobbin.
Accordingly, when the elastic yarn is slidably guided to the one end portion of the full bobbin, it can be smoothly performed by the inclined surface, so that damage to the elastic yarn can be reduced.
[Brief description of the drawings]
FIG. 1 is a front view showing a spinning winder.
FIG. 2 is a perspective view showing a yarn switching device in a spinning winder.
FIG. 3 is a view taken along arrow AA in FIG. 2;
FIG. 4 is a schematic diagram for explaining a yarn switching method of a spinning winder.
FIG. 5 is a schematic diagram for explaining a yarn switching method of a spinning winder.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Spinning winder 2 Machine body frame 3 Turret 4 Bobbin holder 5 Bobbin holder 6 Lifting box 7 Thread switching device 8 Turret shaft 9 Contact roller 10 Traverse device 11 Traverse guide 15 Thread switching guide 16 Winding end yarn end guide 17 Guide shaft 18 Guide Groove 19 Empty bobbin width center 20 Inclined surface 21 Guide groove

Claims (4)

The elastic yarn from the yarn supply side is wound around the bobbin, and when the full bobbin is reached, the empty bobbin is brought into contact with the elastic yarn on the yarn supply side of the full bobbin, and then the elastic yarn is switched from the full bobbin to the empty bobbin. A spinning winder,
A thread switching guide and a winding end thread end guide, which are moved around the outer periphery of the empty bobbin at the time of switching the elastic yarn, and capture the elastic yarn between the empty bobbin and the full bobbin;
The yarn switching guide captures the elastic yarn between the empty bobbin and the full bobbin , positions it at a position different from one end outside the winding width of the full bobbin, winds it around the empty bobbin, It also captures elastic yarn between contact rollers ,
The winding end yarn end guide guides the elastic yarn to the one end portion of the full bobbin, and causes the elastic yarn to fall from the end of the winding width, and is positioned at the one end portion. A spinning winder. The yarn switching guide enters between the empty bobbin and the full bobbin and is movable around the outer periphery of the empty bobbin.
The spinning winder according to claim 1, wherein the winding end yarn end guide is attached to the yarn switching guide.   The winding end yarn end guide has an inclined surface that slides and guides the elastic yarn to one end of the full bobbin while moving around the outer periphery of the empty bobbin. Spinning winder. The elastic yarn from the yarn supply side is wound around the bobbin, and when the full bobbin is reached, the empty bobbin is brought into contact with the elastic yarn on the yarn supply side of the full bobbin, and then the elastic yarn is switched from the full bobbin to the empty bobbin. A yarn switching method for a spinning winder,
When switching the elastic yarn,
The elastic yarn between the empty bobbin and the full bobbin is captured , positioned at a position different from one end outside the winding width of the full bobbin, wound around the outer periphery of the empty bobbin, and the empty bobbin and the contact roller Capturing the elastic yarn in between ,
The elastic yarn between the empty bobbin and the full bobbin is guided to the one end of the full bobbin by moving the elastic bobbin around the outer periphery of the empty bobbin, and an end face drop occurs where the elastic yarn falls from the end of the winding width. And a step of positioning at the one end , and a yarn switching method for a spinning winder.

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