JPH0415291B2 - - Google Patents

Description

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

Conventional technology 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 raised once and then lowered to the winding start position. However, there were many occurrences of thread curling. As shown in Fig. 1, when the ring rail 1 rises from the bottom bunch winding position shown by the chain line, the traveler 3 on the ring 2 handles the yarn Y, so the traveler 3 is placed between the traveler 3 and the pet's snell wire 4. The thread Y connected to the traveler 3 tends to be looser than the thread connected between the traveler 3 and the spindle base 5, sometimes forming a snarl 6, and the traveler 3 completely rests on the ring 2 due to its own weight, causing the ring 2 to become loose. A large gap is formed between the lower engaging part and the opening of the traveler 3, and the thread connected between the traveler 3 and the spindle base 5 approaches substantially parallel to the bobbin 7 inserted into the spindle. This is because the yarn Y is in a state where it is easy to come off from the traveler 3. That is, if the bobbin 7 is rotated and the operation is restarted in the state shown in FIG. It becomes impossible to remove the thread and the thread breaks.

As a restart method to eliminate this drawback, a method of raising and lowering the ring rail according to the diagram shown in Fig. 3 is proposed in the Japanese Patent Publication No. 53-1999, which was announced on February 2, 1973.
It is described in Publication No. 2969. In this method, after doffing and inserting an empty bobbin, the ring rail 1 is raised by the forward rotation of the swinging motor for the time set by the timer TR1, and at the same time as the timer reaches time-up, the swinging motor is reversed and the ring rail is lowered. Then, during the descent of the ring rail 1, the main motor of the main machine is activated by a time-up command from the timer TR2 to wind the thread around the bobbin 7, and furthermore, during the descent of the ring rail 1, the lowering solenoid is activated by the action of the timer TR3. By automatically lowering the ring rail 1 to the winding start position, ballooning at the time of restart is stabilized, and then normal operation begins. In this method, after raising the ring rail 1, the ring rail 1 is lowered before rotating the spindle, so that the snarl 6 formed when the ring rail 1 is raised as shown in FIG. 1 disappears, and the snarl 6 shown in FIG. As shown, the traveler 3 tends to be lifted up and is ready to travel. Therefore, the gap between the opening of the traveler 3 and the lower engagement part of the ring 2 is almost closed, and in addition, the thread Y connected between the traveler 3 and the spindle base 5 forms a considerably large angle with respect to the axis of the bobbin 7. Thus, the thread Y is difficult to come off from the traveler 3. Therefore, when operation is restarted in the state shown in Figure 2,
Yarn winding is performed without yarn breakage due to balloon collapse.

However, in this conventional method, in order to reduce thread breakage due to balloon collapse, the ring rail
It is necessary to ensure a certain amount of descent of the ring rail 1, that is, to ensure a large amount of rise of the ring rail 1, and to ensure a certain level of descending speed of the ring rail 1. Since the swing motor in the conventional device raises and lowers the ring rail 1 at the same speed, if the lowering speed is secured above a certain level, the raising speed increases accordingly. However, as described above, when the ring rail 1 is raised, the thread Y connected to the Snell wire 4 via the traveler 3 tends to become loose, so if the rising speed is fast, there is a high chance that the thread will come off from the traveler 3. When the thread Y comes off from the traveler 3, thread breakage always occurs. Moreover, in this case, there was a problem in that the end of the thread wound around the upper part of the bobbin, and when it was swung around, it also caused the thread of the adjacent weight to break.

Purpose This invention was made in order to solve the above-mentioned conventional problems, and its purpose is to reduce the rising speed of the ring rail at the time of restarting and to reduce the possibility of the line coming off from the traveler during the rise. An object of the present invention is to provide an automatic movement device for restarting a spinning machine.

Structure of the Invention In order to achieve the above-mentioned object, the present invention provides a oscillator capable of raising and lowering the ring rail independently of the drive of the machine main motor at the time of restart in order to make the rising speed of the ring rail slower than the descending speed. The drive motor is designed to be able to change its speed between forward and reverse rotation.

Example 1 The first example embodying this invention will be described below as the fourth example.
This will be explained according to Figures 6 to 6. First, the drive mechanism for raising and lowering the ring rail will be explained with reference to FIG. A shaper wheel 11, which is fed one tooth at a time by the swinging of a ring rail (not shown), 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 and a slide clutch 14 are rotatably supported on the support shaft 10, and a clutch piece 15 is fixed so as to be rotatable together. A shaft portion for rotatably supporting a clutch piece 17 integrally formed with a gear 16 is formed protruding from one end of the worm 13, and a claw portion (not shown) is formed at the tip of the shaft portion. It engages with a claw portion that rotates together with the attached flange 18. The gear 16 is a main motor (not shown)
It is designed to always mesh with the gear 20 of the gear mechanism 19 that transmits the drive from. A toothed pulley 21 is fixed to the end of the support shaft 10, and the rotation of the swing motor M2 is caused by a worm 22, a worm wheel 23, an electromagnetic clutch 24, a toothed pulley 25,
The signal is transmitted to the toothed pulley 21 via a timing belt 26. The swing motor M2 is a 4/8-pole switching electric motor whose rotational speed can be changed in two stages between forward rotation drive and reverse rotation drive.

A clutch lever 27 that switches the engagement of the pawl flange 18 of the slide clutch 14 is rotatably supported by a shaft 28 extending in a direction perpendicular to the support shaft 10, and a spring 29 causes the pawl flange 18 to engage with the clutch piece 15. It is urged to rotate in the direction of A bolt 31 that can be engaged with a plunger 30 of a solenoid SOL is screwed onto one end of the clutch lever 27. The hand shaft 10
A worm wheel 34 that meshes with the worm 13 is fixed to an intermediate portion of a shaft 33 that extends in a direction perpendicular to the worm 13, and a chain pulley 36 for winding a chain 35 connected to a ring rail at one end.
is fixed, and the chain 35 is wound up and unwound by the chain pulley 36 in conjunction with the rotation of the worm 13. Further, cams 37 and 38 are fixed to the other end of the shaft 33 for operating limit switches LS1 and LS2 electrically connected to the solenoid SOL. This drive mechanism is controlled by the control circuit shown in FIGS. 6a and 6b.

Next, the operation of the apparatus configured as described above will be explained. During normal operation, the pawl flange 18 is engaged with the clutch piece 15, and the shaper wheel 11 is engaged with the clutch piece 15.
When the clutch piece 15 is rotated by a certain angle, the clutch piece 15 is rotated together with the support shaft 10, and this rotation causes the claw flange 1 to rotate.
8 to the worm 13. The rotation of the worm 13 is transmitted to the chain pulley 36 via the worm wheel 34 and the shaft 33, and gradually winds up the chain 35 connected to the ring rail, which causes the ring rail to move up and down by a heart cam (not shown). A tube thread is formed.

When restarting after doffing and inserting an empty bobbin, press push button switch PB3 in the first circuit, relay CR1 will be activated.
is excited and self-maintained. As a result, the timer TR1 in the first circuit starts counting, and at the same time, the electromagnetic contactor MS2F in the first circuit for driving the swinging motor in normal rotation is excited, and the swinging motor M2 is driven at low speed with eight poles. When the swing motor M2 rotates normally, the spindle 10 is rotated via the electromagnetic clutch 24, the toothed pulley 25, the timing belt 26, and the toothed pulley 21. transmitted to the worm 13, the worm wheel 34,
The chain pulley 36 connects to the chain 3 via the shaft 33.
5 is rotated in the direction of winding up, and the ring rail rises at a low speed. Since the ring rail ascends at a slow speed, unlike conventional devices, the occurrence of the thread coming off from the traveler 3 is extremely reduced.

When the ring rail rises to a predetermined position, the timer TR1 times up, its normally closed contact TR1b in the first circuit opens, and its normally open contacts TR1a in the first circuit and the second circuit close.
As a result, relay CR1 is demagnetized and the normally open contact in the first circuit, which was previously held in the closed state, is
CR1a opens, the forward rotation drive electromagnetic contactor MS2F of the swing motor M2 is demagnetized, and the reverse drive electromagnetic contactor MS2R in the first circuit is excited, and the swing motor M2 is driven in the reverse direction with four poles.
As a result, the ring rail begins to descend at double the speed at which it rose, that is, at the same speed as the descending speed of the conventional device. At the same time, timers TR2 and TR3 start counting. During the descent of the ring rail, the timer TR2 times up and its normally open contact TR2a in the first circuit closes, the main motor drive electromagnetic contactor MS1 is energized and self-held, the main motor M1 starts and the spindle rotates. Start. Then, timer TR3 times up while the ring rail is descending before the rotational speed of the spindle reaches the normal operating speed, and the normally closed contact TR3b in the first circuit opens and the oscillating motor M
At the same time, the second reverse drive electromagnetic contactor MS2R is demagnetized, the normally open contact TR3a in the first circuit is closed, and the solenoid SOL is energized. As a result, the clutch lever 27 is rotated against the spring force of the spring 29, and the pawl flange 18 of the slide clutch 14 is engaged with the other clutch piece 17. As a result, the rotation of the main motor M1 is controlled by the gear mechanism 1.
9, the ring rail is transmitted to the worm 13 via the gear 20, the clutch piece 17, and the pawl clutch 18, and the ring rail is automatically lowered at a higher speed than the lowering speed caused by the swing motor M2. When the ring rail descends to the winding start position, the limit switch LS2 is pushed by the cam 38, and the normally closed contacts LS2b in the first circuit and the first circuit are opened. This allows the solenoid
SOL is demagnetized, the clutch lever 27 is rotated by the force of the spring 29, and the claw flange 1
8 separates from the clutch piece 17 and becomes the clutch piece 15.
and the ring rail stops descending. Thereafter, the ring rail swings following the movement of the heart cam (not shown), and normal operation begins.

Embodiment 2 Next, a second embodiment of this invention is shown in FIGS. 7 and 8.
This will be explained according to figures a and b. In this embodiment, the raising of the ring rail at the time of restart and the lowering movement to the winding start position are all performed by the swinging motor M2, and a squirrel cage induction motor driven via an inverter is used as the swinging motor M2. This is a major difference from the apparatus of the previous embodiment.

As shown in FIG. 8a, the drive circuit for the swing motor M2 includes a variable resistor VR1 for setting low speed rotation, a variable resistor VR2 for setting medium speed rotation, and a variable resistor VR3 for setting high speed rotation, and , an inverter INV1 having a forward/reverse switching contact P1 is connected. Push button switch in the first circuit when restarting
When PB3 is pressed, relay CR1 is energized and self-held, and the oscillating motor drive electromagnetic contactor MS2 in the first circuit is energized and the timer is activated.
TR1 starts counting. As a result, the swing motor M2 is driven to rotate normally at a low speed via the inverter INV1, and the ring rail starts to rise at a low speed. When the ring rail rises to a predetermined position, the timer TR1 times out, its normally closed contact TR1b in the first circuit opens, and the forward/reverse switching contact P1 of the inverter INV1 switches to switch the normally closed contact TR1b in the first circuit and the normally closed contact TR1b in the first circuit to open. open contact
TR1a closes. As a result, the swing motor M2
is driven in reverse at a speed faster than the normal rotation through the medium-speed rotation setting variable resistor VR2 of the inverter INV1. Then the ring rail descends.
Timer TR2 times up during the descent of the ring rail, and its normally open contact in the first circuit
When TR2a closes, the main motor drive magnetic contactor MS
1 is excited and self-held, the main motor M1 starts and the spindle starts rotating. When the ring rail further descends, timer TR3 times up, and the normally closed contact TR3 in the first circuit
Its normally open contact in the first circuit at the same time as b opens
TR3a closes. As a result, the swing motor M2
is rotated at a higher speed than before via the high-speed rotation setting variable resistor VR3 of the inverter INV1, and the ring rail is also lowered at a high speed. When the ring rail descends to the winding start position, the limit switch LS2 is pushed by the cam 38, its normally closed contact LS2b in the first circuit opens, and the timers TR1, TR2, which had been kept in the energized state until then, are activated.
Magnetic contactor for driving TR3 and swing motor M2
MS2 is demagnetized, 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. When switching from lowering by the swing motor M2 to automatic lowering by the action of the main motor M1 while the ring rail is lowering, the slide clutch 14 operated by the solenoid SOL is used to switch to automatic lowering. Momentary stagnation may occur and ballooning may not proceed smoothly. However, when changing the speed of the swing motor 2 as in this embodiment, the lowering speed of the ring rail can be smoothly changed, ballooning can be performed smoothly, and the thread can be wound reliably.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, the swing motor M2 may be
The shape of each part may be changed without departing from the spirit of the invention, such as by using a pole-switching electric motor or a DC motor that can switch speeds, or by changing the raising of the ring rail to a predetermined position to a timer TR1 and regulating it with a limit switch. , the configuration, etc. can be changed arbitrarily.

Effects As detailed above, according to the present invention, it is possible to reduce the rising speed of the ring rail when restarting the machine, which greatly reduces the possibility of thread coming off from the traveler when the ring rail rises, thereby reducing thread breakage. can be prevented. Further, the load applied to the swing motor when the ring rail is raised and lowered by the swing motor is greatest when the ring rail is raised, and the required rated output of the motor is determined by the load when the ring rail is raised. Therefore, if the rising speed becomes slower, the load torque applied to the motor becomes smaller, so the rated output of the motor can be lowered, and the capacity of the electromagnetic clutch is also reduced, which is an advantage in that energy consumption and costs can be reduced. be effective.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing the state of the traveler and thread when the ring rail is raised in a conventional device.
The figure is a schematic diagram showing the state in which the ring rail has been lowered, FIG. 3 is a line diagram showing the change in height of the ring rail when restarting the conventional device, and FIG. 4 is a diagram of the device embodying the present invention. A perspective view showing the drive mechanism, FIG. 5 is a line diagram showing changes in the height position of the ring rail at the time of restart in the first embodiment, FIGS. 6 a and b are electrical circuit diagrams, and FIG. Figures 8a and 8b are electrical circuit diagrams showing changes in the height position of the ring rail at the time of restart in the embodiment. Ring rail...1, Traveler...3, Slide clutch...14, Main motor...M1, Swing motor...
M2, solenoid...SOL, limit switch...
LS2, inverter...INV1.

Claims (1)

[Scope of Claims] 1. A ring spinning machine and ring twisting yarn, which are configured so that the ring rail can be raised and lowered during restart by rotating the swinging motor in the forward and reverse directions independently of the drive of the machine main motor. In a spinning machine such as a spinning machine, the swinging motor is a motor whose speed can be changed between forward rotation and reverse rotation in order to make the rising speed of the ring rail slower than the descending speed. Oscillating device. 2. The automatic swinging device for restarting a spinning machine according to claim 1, wherein the swinging motor is a pole number switching electric motor. 3. The swing motor is a squirrel-cage induction motor, and the forward rotation drive circuit is connected to an inverter whose frequency can be changed.
An automatic movement device for restarting a spinning machine as described in 2.