JPH09302535A - Winding of tail yarn in spinning machinery and controller for lifting and lowering of ring rail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a tail yarn winding smoothly fly about from a tail yarn winding part provided in a lower part of a spindle after restarting a frame. SOLUTION: A ring rail 9 is suddenly lowered after completing the top bunch winding to form an oblique winding on the surface of a full bobbin B. When the ring rail 9 reaches a position L0 for starting the tail yarn winding, the moving direction thereof is reversed upward and the ring rail 9 is lifted to a lifting and lowering position L1 at a prescribed speed. When reaching the lifting and lowering position L1, the ring rail 9 is lifted to a primary lifting position and then stopped. Thereby, a tail yarn winding Y is helically formed in a tail yarn winding part 41. At the time of doffing, the tail yarn Y1 connected to the full bobbin B is cut with a cutting blade 42b when withdrawing the full bobbin B. After restarting a frame, a tail yarn Y2 connected from the tail yarn winding to the bobbin is cut with a device for treating the residual yarn and the tail yarn winding Y flies about as a fiber from cut ends of the tail yarns Y1 and Y2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tail thread winding method and a ring rail lifting control device for a spinning machine such as a ring spinning machine and a ring twisting machine.

[0002]

2. Description of the Related Art Conventionally, in a spinning machine such as a ring spinning machine and a ring twisting machine, doffing work is automatically performed when the pipe is full. Therefore, it is required that the yarn connected to the roller part is connected to the spindle while passing through the traveler so that the yarn can be automatically wound around the empty bobbin at the time of restarting after the doffing. To meet this requirement,
As shown in FIG. 7, a cutting blade 52b is provided and a concave portion 52a is provided around the periphery.
And the tail thread winding portion 51 having a knurl (not shown) formed on the circumferential surface immediately below the restriction portion.
The rotary clip 50 consisting of and was fitted to the lower part of the spindle. After the pipe is fully filled, the ring rail 53 is suddenly lowered to perform the inclined winding, and then the ring rail 53 is stopped at a predetermined position to wind the thread around the tail thread winding portion 51 several times to form a tail thread winding (bottom bunch) Y. When the full thread is pulled out, the full thread B is passed from the tail thread winding Y through the recess 52a.
The tail yarn Y1 extending in line was cut against the cutting blade 52b in a tensioned state.

When the machine base is restarted after the doffing, the yarn still passing through the traveler T is wound around the empty bobbin and the spinning is restarted. Since the cut end of the tail yarn Y1 is exposed to the high-speed airflow by the rotation of the spindle, the tail yarn winding Y is scattered as fibers from the cut end.

[0004]

However, in the prior art, since the tail thread winding Y is wound around the tail thread winding portion 51 at the same position, the tail threads are entangled with the fluff on the surface and the bottom thread is fluttered. It is strongly pressed against the knurling of the spool 51. Therefore, when the tail thread winding Y is prevented from scattering as fibers, the tail thread winding Y is not completely scattered by the time of the next doffing, and a part of the tail thread winding Y remains in the tail thread winding portion 51. There is. If the tail thread winding Y remains, the tail thread is wound at the same position and the tail thread winding is not only scattered, but also the newly wound tail thread winding is prevented from being scattered. Furthermore, since the knurling fluctuation regulating action does not work on the newly wound tail yarn, the tail yarn moves with a slight external force. Furthermore, the yarn end of the tail yarn may become entangled with the take-up yarn when the machine base is restarted, which may cause yarn breakage or fluffing.

The present invention has been made in view of the above-mentioned problems, and an object thereof is a tail in a spinning machine in which the tail thread wound around the tail thread winding portion is reliably scattered by the rotation of the spindle after the machine base is restarted. An object of the present invention is to provide a bobbin winding method and a ring rail lifting control device.

[0006]

In order to achieve the above object, in the invention according to claim 1, the ring rail is lowered to the tail thread winding start position, and then either above or below the tail thread winding start position. The ring rail was moved in one direction to form a tail spool during slow rotation of the spindle.

According to the invention of claim 2, in the invention of claim 1, the movement of the ring rail in one direction from the tail thread winding start position is continuously performed at a constant speed.

According to the invention of claim 3, in the invention of claim 1 or 2, the tail thread winding start position is changed for each doffing. In the invention according to claim 4, ring rail drive means for driving the ring rail up and down, ring rail position detection means for detecting the up and down position of the ring rail, and the ring rail above and below the tail thread winding start position during tail thread winding. And a control means for controlling the ring rail driving means based on a detection signal from the ring rail position detecting means so as to move the ring rail up and down control device.

According to a fifth aspect of the present invention, in the fourth aspect of the invention, the control means includes setting means capable of setting a moving direction and a moving speed of the ring rail when the tail thread is wound.

According to a sixth aspect of the invention, in the fifth aspect of the invention, the setting means can set a plurality of different tail thread winding start positions for each doffing.

[0011] According to the invention described in claims 1 to 6,
A tail thread winding is formed in a spiral shape on the tail thread winding portion provided at the lower portion of the spindle without being repeatedly wound in the same place.

According to the second aspect of the present invention, the ring rail moves at a constant speed in one of the upper direction and the lower direction when forming the tail thread winding. In the invention described in claims 3 and 6, the tail thread winding start position of the ring rail is changed for each doffing.

According to another aspect of the invention, the control means controls the ring rail driving means so that the moving direction and the moving speed of the ring rail are set by the setting means.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 2, the draft part, the spindle drive system, and the lifting drive system are independently driven and controlled. Main motor M
Is transmitted to the driving shaft 2 via the belt 1. A gear 2a is provided at one end of the driving shaft 2.
Is fixed, and the rotation of the driving shaft 2 is input to the reduction gear mechanism 3. The final stage gear 3 of the reduction gear mechanism 3
A rotary shaft 4a to which the front roller 4 is fixed is connected to a. Chin pulley 5 on the driving shaft 2
Is fixed, and the spindle 7 is rotated via the spindle tape 6.

The lifting drive system employs basically the same structure as a known device (for example, Japanese Utility Model Publication No. 3-48223) for raising and lowering a ring rail or the like by utilizing forward and reverse rotations of a line shaft. Below the ring rail 9 and the lappet angle 10, a line shaft 8 that constitutes a ring rail drive means is provided, and the ring rail lifting unit 1 that also constitutes a ring rail drive means.
Power is transmitted to 1. Ring rail lifting unit 11
Is a screw gear 12 fixed to the line shaft 8.
And a nut body 1 having a poker pillar 13 that supports the ring rail 9 or the lappet angle 10, and a gear portion 14a that is screwed on the inner peripheral surface with a screw portion 13a formed on the poker pillar 13 and that is meshed with the screw gear 12.
And 4.

The rotation of the servomotor 17 constituting the ring rail driving means is driven by the gear 1 fixed to its output shaft 17a.
8 and a gear 16 that meshes with a gear 18
5 is transmitted. The rotation of the rotary shaft 15 is performed by rotating a bevel gear 22 provided at an end thereof from a bevel gear 23 fixed to the rotary shaft 19.
Is transmitted to A worm 21 is provided at an end of the rotary shaft 19, and the worm 21 is meshed with a worm wheel 20 fixed to the line shaft 8.

The gear 2a provided at the end of the driving shaft 2 is meshed with the gear 24a fixed to the rotary shaft 24, and the rotation of the rotary shaft 24 is transmitted to the gear 27 via the belt transmission mechanism 25. . An electromagnetic clutch 26 is connected to the gear 27, and the electromagnetic clutch 26 is operated so as to connect the rotating shaft 15 and the gear 27 only during a power failure.

A sensor S for detecting the rotation of the gear 2a, a sensor SS for detecting the rotation of the gear 3a, and a rotary encoder 31 for detecting the rotation of the servomotor 17 are connected to the control device 28 as the control means. And each signal is input. The signals from the sensor S and the sensor SS are used for measuring the winding amount of the yarn and the spindle rotation speed, respectively. The rotary encoder 31 serves as a ring rail position detecting means. The controller 28 controls the rotations of the servo motor 17 and the main motor M via a servo driver 30 that feedback-controls the servo motor 17 and an inverter 29 that is connected to the main motor M. Also,
The setting device 32 as setting means sets various set values in the control device 28 according to the yarn type for driving the main motor M or the servo motor 17, the spinning conditions, and the like. As the set value, for example, the rotation speed pattern of the spindle 7 (the rotation speed N at the time of top bunch winding, the delay time ta from the start of bobbin winding to the start of deceleration), and the movement pattern of the ring rail 9 as shown in FIG. 3 ( Lifting position L0, L1, L3)
Etc. The control device 28 has a CPU (not shown) built therein, and drives and controls the main motor M and the servomotor 17 according to a predetermined program based on a set value preset by the setting device 32.

As shown in FIG. 1B, a rotary clip 40 having a tail thread winding portion 41 and a regulating portion 42 is fitted to the lower portion of the spindle 7. The regulating portion 42 is the tail winding portion 4
1 is provided and has a large number of recesses 42a capable of receiving the tail yarn Y1 connected to the full thread B mounted on the spindle 7, and at the time of removing the full thread B from the bottom thread Y1 introduced into the recess 42a. Annular cutting blade 4 that abuts and cuts
2b. Further, a tape (not shown) having a hook-and-loop fastener is attached to the surface of the tail thread winding portion 41.

Next, the operation of the device configured as described above will be described. When the winding amount of the yarn reaches a predetermined value set by the setting device 32 prior to the operation of the spinning machine, the ring rail 9 is raised to a predetermined position from time t0 and the top bunch winding operation is performed, as shown in FIG. Is started. At this time, the spindle 7 is rotated at a slow speed, and the rotation speed of the spindle 7 is maintained at N1. When the top bunch winding is wound by a predetermined amount, the ring rail 9 is suddenly lowered and an inclined winding is formed on the peripheral surface of the yarn. Ring rail 9 at time t1
When the tail thread winding start position L0 is reached, the ascending / descending direction is switched so as to rise at a constant speed lower than the ascending / descending speed during normal winding, and the tail thread winding Y is formed in the tail thread winding portion 41. At time t2, the tail rail winding of the ring rail 9 is finished at the ascending / descending position L1, and the ring rail 9 is raised to the primary raising position L3 and then stopped. The rotation speed of the spindle 7 is the time t1.
After a delay time T has elapsed, deceleration is started, and when the ring rail 9 reaches the primary rising position L3, the rotation of the spindle is stopped.

As shown in FIGS. 1 (a) and 1 (b), tail thread winding is started on the tail thread winding portion 41 from a position corresponding to the tail thread winding start position L0, and as the ring rail 9 rises, the tail thread winding is spiraled. A spool Y is formed. The bottom thread Y2 connected from the bottom thread winding Y is connected to the traveler T. The tail yarn Y1 that is continuous with the full-filled yarn B is cut by the cutting blade 42b by pulling out the full-filled yarn B during doffing. After the empty bobbin is mounted on the spindle 7, the machine base is restarted and the spindle 7 is rotated again. At this time, the fibers start to be scattered from the cut end of the tail yarn Y1.

After this, for example, Japanese Patent Laid-Open No. 61-19824.
When the tail yarn Y2 is cut by the residual yarn processing device as described in No. 3, the fibers are also scattered from the cut end of the tail yarn Y2, and the tail yarn winding Y is quickly scattered.

This embodiment has the following effects. (A) Since the tail thread winding Y is formed in a spiral shape by changing the position in the tail thread winding portion 41, the tail threads may be entangled with each other's fluff, or the lower layer tail thread may be pressed against the surface fastener more than necessary. Absent. Therefore, the tail yarn winding Y is smoothly scattered as fibers.

(B) Since the tail bobbin winding Y is formed by raising the ring rail 9, the distance from the end of the tail bobbin winding to the primary rising position is shortened, and the thread is detached from the traveler T during the primary lifting. The risk of being adversely affected by is reduced.

(C) Since the ring rail 9 is raised at a constant speed when the tail spool Y is formed, drive control of the ring rail 9 is facilitated. (D) Since the tape having the hook-and-loop fastener is attached to the peripheral surface of the tail thread winding portion 41, the position of the tail thread winding Y can be reliably held with a simple configuration.

(E) Ring rail 9 after forming the tail bobbin
In order to stop the rotation of the spindle 7 when reaches the primary rising position L3, the spindle 7 is decelerated after a delay time ta has elapsed from the time t1 at which the tail bobbin formation starts. Therefore,
It is possible to prevent the yarn from coming off the traveler T by stopping the rotation of the spindle before the ring rail 9 reaches the primary rising position L3.

(F) Since the drive means for rotating the line shaft 8 in the forward and reverse directions is constituted by the servo motor 17, the ascending / descending position of the ring rail 9 at the time of forming the tail spool can be accurately controlled.

The present invention is not limited to the above embodiment, but may be embodied as follows, for example. (1) As shown in FIG. 4, the ring rail 9 may be moved at a constant speed when the tail spool is formed. Time t2
At the ascending / descending position L2 and then the primary ascending position L3
To rise. At this time, only the deceleration is performed without reversing or stopping the moving direction of the ring rail 9 during the steep descent when forming the inclined winding, so that the driving load of the servo motor 17 can be reduced.

(2) The movement of the ring rail 9 at the time of winding the tail thread is not limited to the simple movement of raising or lowering, but may be any movement as long as the tail thread windings Y are wound around the tail thread winding portion 41 without overlapping each other. For example, as shown in FIG. 5, after temporarily stopping the movement of the ring rail 9 at the time of forming the tail spool until the predetermined time t3 at the tail spool starting position L0,
You may make it raise to the raising / lowering position L1. At this time, after about one turn is wound at the position corresponding to the tail thread winding start position L0, the ring rail moves up at a constant speed to form a spiral tail thread winding Y. Further, even in the case of (1) in which the tail thread winding start position L0 is on the upper side of the tail thread winding portion 41, similarly, the ring rail 9 may be temporarily stopped and then the descent may be started.

(3) The stop of the ring rail 9 at the time of forming the tail thread winding of (2) may be performed during the movement of the ring rail 9. Alternatively, the stop may be performed after the ring rail 9 is raised or lowered.

(4) Ring rail 9 for forming the tail spool
The movement of is not at a constant speed, but the speed may be changed as the spindle decelerates. (5) As shown in FIG. 6, the tail thread winding start position L0 may be changed for each doffing operation. For example, as the operating condition, the tail thread winding start position L0 is set by the setting device 32.
Set so that 1 and L02 are alternately repeated. In this case, when the last tail winding start position was L01, the bottom thread winding start position at the time of the next doffing is changed to L02.
Y11 and Y21 are Y1 when the tail winding start position is L01.
Reference numerals 2 and Y22 respectively represent the tail threads when the tail thread winding start position is L02. At this time, even if the tail thread winding at the time of the previous doffing does not scatter and remains, it is prevented that a new tail thread winding is formed in the same place. The tail winding start position may be set in three or more types.

(6) Ring rail 9 for forming the tail spool
When the movement is performed at a constant speed, the constant speed may be changed for each doffing. Even at this time, as in (5), even if the tail bobbin wind at the time of the last doffing is not scattered and remains, the moving speed of the ring rail 9 is different from that at the previous time, so that the same position is set at the same place. It is prevented that new tail windings are overlapped and formed, and both the remaining tail winding and the newly wound tail winding are easily scattered.

(7) The present invention may be applied to a spinning machine that is not equipped with a residual yarn processing device. (8) A knurl may be formed instead of the surface fastener of the tail thread winding portion 41.

(9) As the ring rail position detecting means, a position sensor for directly detecting the vertical position of the ring rail 9 may be used. Further, the ring rail 9 is indirectly detected by a timer based on a preset ring rail movement pattern without directly detecting the lifted position of the ring rail.
You may make it detect the raising / lowering position of.

(10) The ring rail 9 may be raised to the primary raising position after the rotation of the spindle 7 is stopped. The inventions other than those described in the claims that can be grasped from the embodiment and the modified examples will be described below together with their effects.

(1) In the invention according to any one of claims 4 to 6, the setting means can set at least one of a moving direction and a moving speed of a plurality of different ring rails for each doffing. To be there. In this case, even if the last buttocks winding remains in the buttocks winding part, it is prevented that a new buttocks winding is formed on the same butting at the same place, and the remaining buttocks winding and new windings are newly wound. Both sides of the tail bobbin are easily scattered.

(2) In the invention according to claim 1 or 2, the moving direction of the ring rail at the time of forming the tail spool is upward. In this case, since the distance from the end of the tail bobbin winding to the primary rising position is shortened, it is possible to reduce the risk of being adversely affected by the thread coming off the traveler T during the primary lifting.

(3) In the invention according to claim 1 or 2, the moving direction of the ring rail at the time of forming the tail thread winding is downward. In this case, only the deceleration is performed without reversing or stopping the movement of the ring rail that suddenly descends due to the inclined winding, so that the driving load of the ring rail driving means is reduced.

[0039]

As described above in detail, in the inventions according to claims 1 to 6, the tail windings are wound without overlapping each other, so that the tail windings are smoothly scattered from the tail winding portion.

According to the second aspect of the invention, the drive control of the ring rail at the time of forming the tail thread winding is easily performed. According to the third and sixth aspects of the present invention, even if the last tail thread winding remains in the tail thread winding portion, it is prevented that a new tail thread winding is formed on the tail thread winding portion at the same position. It is easy to scatter both the remaining bobbin winder and the newly wound bobbin winder.

In the invention described in claim 5, it is possible to set the moving direction and the moving speed of the ring rail 9 at the time of forming the tail thread winding according to the spinning condition such as the yarn type.

[Brief description of drawings]

FIG. 1A is a diagram of a ring rail elevating position when forming a tail thread winding according to an embodiment, and FIG. 1B is a schematic cross-sectional view of a tail thread winding portion corresponding to FIG.

FIG. 2 is a schematic perspective view of a drive system.

FIG. 3 is a diagram of the spindle rotation speed and the ring rail lifting position.

FIG. 4A is a diagram of a lifted position of a ring rail at the time of forming a tail thread winding of a modified example, and FIG. 4B is a schematic view of a tail thread winding portion corresponding to FIG.

FIG. 5A is a diagram of a ring rail elevating position at the time of forming the tail thread winding of another modified example, and FIG. 5B is a schematic view of the tail thread winding portion corresponding to FIG.

FIG. 6A is a diagram of a ring rail elevating position at the time of forming the tail thread winding of another modified example, and FIG. 6B is a schematic view of the tail thread winding portion corresponding to FIG.

FIG. 7 is a schematic sectional view showing a conventional technique.

[Explanation of symbols]

5 ... Spindle, 8 ... Line shaft constituting ring rail driving means, 9 ... Ring rail, 11 ... Ring rail lifting unit constituting ring rail driving means, 17
... Servo motor constituting ring rail driving means, 28
... control device as control means, 31 ... rotary encoder as ring rail position detection means, 32 ... setting device as setting means, Y ... tail thread winding, 41 ... tail thread winding portion,
L0, L01, L02 ... Bottom bobbin winding start position.

Claims (6)

[Claims] 1. A tail bobbin winding method in a spinning machine for forming a bobbin bobbin winding during slow rotation of a spindle in a bobbin bobbin winding section provided at a lower part of a spindle, wherein after moving a ring rail to a bobbin bobbin winding start position, A tail bobbin winding method in a spinning machine, wherein a tail rail is formed by moving a ring rail from the tail bobbin winding start position to one of an upper direction and a lower one. 2. The tail winding method for a spinning machine according to claim 1, wherein the movement of the ring rail in one direction from the tail winding start position is continuously performed at a constant speed. 3. The tail winding method for a spinning machine according to claim 1, wherein the tail winding start position is changed for each doffing. 4. A ring rail driving means for moving the ring rail up and down, a ring rail position detecting means for detecting an ascending / descending position of the ring rail, and one of the ring rail above and below the tail thread winding start position when the tail thread is wound. To move towards
A ring rail lifting control device for a spinning machine, comprising: a control means for controlling the ring rail drive means based on a detection signal from the ring rail position detection means. 5. The ring rail lifting / lowering control device for a spinning machine according to claim 4, wherein the control means includes setting means capable of setting a moving direction and a moving speed of the ring rail when the tail thread is wound. 6. The ring rail lifting control device for a spinning machine according to claim 5, wherein the setting means can set a plurality of different tail thread winding start positions for each doffing.