JPH0413452B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a starting device for a spinning machine such as a ring spinning machine or a ring twisting machine.

Prior Art In general, in spinning machines such as ring spinning machines and ring twisting machines, when restarting by inserting an empty bobbin into the spindle after doffing with a full bobbin, the ring rail is is raised once and then lowered to the winding start position. For example, in a spinning machine that performs doffing using an intermittent moving type automatic tube changer, the machine is stopped and restarted according to the diagram shown in FIG. That is, when the tube is full, the main motor stops, the ring rail automatically lowers, and after the bunch winding is formed, the automatic tube changer's uncoupling device swings so that it can enter between the lower end of the bobbin and the spindle. The ring rail is first raised by the forward rotation of the dynamic motor. After doffing is completed at this position, the ring rail is raised secondarily for the time set by timer TR1 due to forward rotation of the swing motor, and at the same time as the timer reaches time-up, the swing motor is reversed and the ring plate is lowered. Then, in response to a command from timer TR2, which times up while the ring rail is descending, the main motor of the machine starts and winds the thread around the bobbin.Furthermore, while the ring rail is descending, the lowering solenoid is activated, automatically lowering the ring rail and winding it. By lowering it to the starting position, the ballooning at startup is stabilized, and then normal operation begins.

On the other hand, in recent years spinning factories have been required to produce a wide variety of products in small lots, and accordingly, spinning conditions have become frequently changed. In ring spinning machines and ring twisting machines, the weight of travel used differs depending on the type of yarn, with heavy travel being used for thick yarns and light travel being used for thin yarns. As shown in FIG. 2, the size of the thread balloon changes depending on the distance L between the travel 2 moving on the ring 1 and the Snell wire 3, and the larger the distance L, the larger the balloon becomes. Therefore, the faster the ring rail 4 descends, that is, the ring 1 descends, the faster the balloon grows. Also, the light travel has more ring 1 slippage than the heavy travel.
It is easy to rotate along with the thread, and the amount of thread wound on the bobbin 5 is small. In contrast, the roller part (not shown)
Since the thread is sent out in a fixed amount from the balloon, the balloon will be larger if a light traveler 2 is used. If the balloon becomes larger than necessary, the thread tension will become too large, causing thread breakage, or
This causes the balloon to collapse, causing the thread to become entangled with the Snell wire 3.

When restarting the conventional device, the ring rail 4 is lowered by the main motor to stabilize the balloon after the ring rail 4 has been raised for the second time. faster than the rate of descent. Therefore, if a light traveler is used, the balloon becomes large due to the above-mentioned reasons, causing thread breakage and thread entanglement with the Snell wire. It was impossible to make a descent.

Purpose This invention was made in order to solve the above-mentioned conventional problems, and its purpose is to prevent the ring from ringing when restarting when the weight of the traveler used is changed depending on the type of thread. The descending speed of the rail can be set to the optimal value according to the traveler used, and even if the spinning conditions are changed frequently, the balloon can be stabilized when restarting, and the balloon becomes too large. An object of the present invention is to provide a starting device for a spinning machine that can reliably prevent yarn from becoming entangled in a Snell wire due to yarn breakage or balloon collapse.

Structure of the Invention In order to achieve the above-mentioned object, the present invention is configured such that the ring rail can be raised and lowered during restart by rotating the swing motor in the forward and reverse directions independently of the drive of the machine main motor. In order to make it possible to change the descending speed setting of the ring rail in ring spinning machines, ring twisting machines, etc., we installed a swing motor that can change the rotation speed setting, and when restarting after doffing. Means for setting the normal rotation time and reverse rotation time of the swing motor are provided, and means for starting the machine main motor at the time when the swing motor changes from normal rotation to reverse rotation is provided.

Embodiment Hereinafter, an embodiment embodying this invention will be described in the third to third embodiments.
This will be explained according to FIG. First, the third and fourth drive mechanisms for raising and lowering the ring rail (not shown) are installed.
This will be explained using figures. A shaper wheel 11, which is fed one tooth at a time by the singing motion of the ring rail, is fixed to one end of the support shaft 10, and a pawl 12 is provided to prevent reverse rotation of the shaper wheel 11. A worm 13, a clutch mechanism 14, and a clutch piece 15 are rotatably supported on the support shaft 10, and a gear 16 is supported on the other end.
is fixed. At one end of the worm 13 there is a fourth
As shown in the figure, a shaft portion 18 that rotatably supports the clutch piece 17 is formed protrudingly, and a claw portion 18a is formed at the tip of the shaft portion 18. The pawl portion 18a engages with a pawl 14a that rotates together with the clutch mechanism 14. A gear 19 is integrally formed on one clutch piece 15, and the rotation of the gear 16 is transmitted to the gear 19 via gears 21 and 22 on a separate shaft 20. A gear 23 is integrally formed on the other clutch piece 17, and the gear 23 always meshes with a gear 25 of a gear mechanism 24 that transmits drive from a main motor (not shown). A toothed pulley 26 is fixed to the end of the support shaft 10, and the rotation of the swing motor M2 is caused by a pair of gears, an electromagnetic clutch 27, and a toothed pulley 26.
8. The signal is transmitted to the toothed pulley 26 via the timing belt 29. The swing motor M2 is a squirrel cage induction motor, and is driven in reverse rotation via an inverter whose frequency can be changed.

A clutch lever 30 that switches the engagement of the clutch mechanism 14 is rotatably supported by a shaft 31 extending in a direction perpendicular to the support shaft 10, and is rotated by a spring 32 in a direction in which the clutch mechanism 14 engages with the clutch piece 15. Forced. A bolt 34 that can engage with the plunger 33 of the solenoid SOL is screwed onto one end of the clutch lever 30, and a locking protrusion 35 is formed on the side surface.A shaft 36 that extends in a direction perpendicular to the support shaft 10 A worm wheel 37 that meshes with the worm 13 is fixed to an intermediate portion of the worm wheel 37, so that the chain 38 is wound up and unwound by a pulley 39 in conjunction with the rotation of the worm 13. Axis 3
6 includes a cam 4 for controlling an engagement lever 40 that engages with the engagement protrusion 35 of the clutch lever 30;
1 is fixed. Also, at the other end of the shaft 36 are cams 42 and 43 that actuate limit switches LS1 and LS2 that are electrically connected to the solenoid SOL.
is fixed.

At the time of restart, the drive mechanism is controlled by the control circuit shown in FIG.

Next, the operation of the apparatus configured as described above will be explained. During normal operation, the clutch mechanism 14 is engaged with the clutch piece 15, and when the shaper wheel 11 rotates by a certain angle, the gear 16 rotates via the support shaft 10, and the gears 21 and 22 on the separate shaft 20 also rotate.
When the gear 21 rotates, the gear 19 that meshes with it rotates, and the clutch piece 1 that is integral with the gear 19 rotates.
5. Rotation is transmitted to the worm 13 via the clutch mechanism 14, pawl 14a, and pawl portion 18a. The rotation of the worm 13 is transmitted to the pulley 39 via the worm wheel 37 and the shaft 36, and gradually winds up the chain 38 connected to the ring rail. This causes the ring rail to be raised and lowered by a heart cam (not shown) and the tube yarn to be moved up and down. Form.
After the full pipe command is received, the machine starts inertial rotation and the solenoid
SOL works and the plunger 33 moves to the spring 32.
The clutch lever 30 is rotated against this force, and the clutch mechanism 14 is engaged with the clutch piece 17. At this time, the locking protrusion 35 of the clutch lever 30 engages with the engagement lever 40 to prevent the clutch lever 30 from returning due to the spring 32.
When the clutch mechanism 14 engages with the clutch piece 17,
The inertia rotation of the main motor causes the gear mechanism 24, the gear 23,
Clutch piece 17, clutch mechanism 14, pawl 14a,
It is transmitted to the worm 13 via the worm 18a, reverses the pulley 39, and is wound back onto the chain 38, so that the ring rail automatically lowers.

When the ring rail descends to the bottom punch winding position, the limit switch LSI1 is pushed, the solenoid SOL is de-energized, the clutch lever 30 is rotated by the spring 32, and the clutch mechanism 1 is rotated.
4 separates from the other clutch piece 17 and engages with one clutch piece 15. In this case, the locking protrusion 35 of the clutch lever 30 and the engagement lever 40
The engagement with is released by the action of the rear cam 41. When the clutch mechanism 14 disengages from the other clutch piece 17, the ring rail stops lowering, and a bunch winding is formed at this position, and when several turns have been made, the rotation of the spindle stops and the bunch winding is completed. Next, the swing motor M2 is driven to rotate normally for a predetermined period of time, and the spindle 10 is rotated via the electromagnetic clutch 27, the toothed pulley 28, the timing belt 29, and the toothed pulley 26. The rotation is transmitted to the worm 13 as described above, and the pulley 39 is rotated in a direction to wind up the chain 38 via the worm wheel 37 and the shaft 36, and the ring plate is raised. When the ring rail is first raised to a position where the tight fitting release device of the automatic tube changer can enter between the lower end of the bobbin and the spindle, the swing motor M2 stops, and the stopping of the spinning machine frame is completed. In addition, in a device that performs doffing without inserting the tight fit release device between the lower end of the bobbin and the spindle, this primary raising of the ring rail is unnecessary and the machine can be stopped when the bunch winding is completed. Complete.

Next, we will explain the effect upon restart. After doffing and inserting an empty bobbin, when the start button PB2 is pressed, the relay CR1 in the second circuit is energized and self-holding. Then, the timer TR1 in the third circuit starts counting, and the normally open contact CR1 of the relay CR1 in the fifth circuit closes, and the electromagnetic contactor MS2F for driving the normal rotation of the swing motor M2 is energized. As a result, the swing motor M2 rotates normally, and the pulley 39 rotates in the direction to wind up the chain 38 in the same manner as described above. When the ring rail rises to a predetermined position, the timer TR1 times up, its normally open contact _TR1 in the fourth circuit closes, and the relay CR2 is energized. Then, the normally open contact CR ₂ of the fifth circuit opens to demagnetize the forward rotation drive electromagnetic contactor MS2F, and the sixth circuit's normally open contact CR ₂ closes to demagnetize the forward rotation drive electromagnetic contactor MS2F.
MS2R is excited, the swing motor M2 is reversed, and the ring rail is lowered. At the same time, the normally open contact _TR1 of the timer TR1 in the first circuit closes, and the electromagnetic contactor MS1 for the main motor M1 is excited and self-held, and the main motor M1 is driven and the spindle starts rotating. As a result, the yarn starts ballooning, but the rotation speed of the swing motor M2 when driven in reverse is set to the optimum value according to the weight of the traveler used by the inverter INV whose frequency setting can be changed. A stable balloon is formed without becoming too large and causing thread breakage or getting entangled with the Snell wire due to collapse of the balloon. When the ring rail descends to the winding start position, limit switch LS2 is pushed by cam 43, its contact _LS2 in the second circuit is opened, relay CR1 is demagnetized, and timer TR1 is also demagnetized. This opens the normally open contact TR ₁ of the 4th circuit and relay CR 2
is demagnetized, the normally open contact CR ₂ in the sixth circuit opens, the reverse drive electromagnetic contactor MS2R is demagnetized, the swing motor M2 is stopped, and the ring rail stops lowering. Thereafter, the ring rail swings following the movement of the heart cam (not shown) and normal operation begins.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, an inverter INV may be connected to the normal rotation drive circuit of the swing motor M2, and the setting of the normal rotation time of the swing motor M2 and the main motor It is possible to configure M1 to be started by a limit switch provided at a predetermined raised position of the ring rail instead of timer TR1, or to provide a timer to set the reverse drive time of swing motor M2, without departing from the spirit of the invention. It is also possible to arbitrarily change the shape, structure, etc. of each part within the range.

Effects As detailed above, according to the present invention, the descending speed of the ring rail when restarting the machine can be set to an arbitrary value, which is optimal for the weight of the traveler used, which changes depending on the operating conditions of the machine. The ring rail can be lowered at a lower speed, and unlike conventional equipment, a stable balloon is formed even when restarting when using a light traveler, preventing thread breakage due to the balloon becoming too large and snell wires due to balloon collapse. It has the excellent effect of being able to reliably prevent the threads from becoming entangled, and to be able to sufficiently respond to frequent changes in operating conditions to meet the demands of high-mix, low-volume production without any hindrance.

[Brief explanation of drawings]

Figure 1 shows how the conventional device restarts after the tube is full.
A diagram up to normal operation; Fig. 2 is a partially cutaway side view showing the condition of the thread connecting the Snell wire to the traveler; Fig. 3 is a perspective view showing the drive mechanism for embodying this invention; Fig. 4 is its cross section,
FIG. 5 is a control circuit diagram, and FIG. 6 is a power circuit diagram. Solenoid SOL, swing motor M2, limit switches LS1, LS2, clutch mechanism 14, timer TR1, inverter INV.

Claims (1)

[Scope of Claims] 1. A ring spinning machine and a ring twisting spinning machine configured so that the ring rail can be raised and lowered during restart independently of the drive of the machine main motor by the forward and reverse rotation of the oscillating motor. In a spinning machine such as a spinning machine, a swing motor whose rotation speed can be changed is installed in order to make it possible to change the setting of the descending speed of the ring rail, and when restarting after doffing, the normal rotation time and time of the swing motor are adjusted. 1. A starting device for a spinning machine, comprising means for setting a reverse rotation time, and means for starting the frame main motor at the time when the swing motor changes from normal rotation to reverse rotation. 2. The spinning machine according to claim 1, wherein the swing motor is a squirrel-cage induction motor, and at least its reverse drive circuit is connected to an inverter whose frequency can be changed. activation device. 3. The means for setting the forward rotation time of the rocking motor and the means for starting the machine main motor are the same timer, and the means for setting the reverse rotation time of the rocking motor is a different timer. A starting device for a spinning machine according to claim 1 or 2.