JPH07109042B2 - Method for forming inclined winding in spinning machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a method for forming an inclined winding in a spinning machine such as a ring spinning machine and a ring twisting machine.

(Prior Art) Generally, a spinning machine of this type is provided with a ring rail lifting mechanism having a configuration as shown in FIG. This ring rail elevating mechanism is driven by a sprocket wheel 2 mounted on a main shaft 1 which is rotationally driven in synchronization with a front bottom roller (not shown), from a gear 4 driven in a direction of an arrow via a chain 3 to a clutch tooth. The gears up to the attached gear 5 are constantly rotating during the operation of the spinning machine, but are idle unless the gear 5 with the clutch teeth engages with the slide clutch 6. During the formation of the yarn, the slide clutch 6 is engaged with the clutch 8 directly connected to the shaper shaft 7 by the force of the spring, and the worm 9 connected to the slide clutch 6 via the spline is connected to the shaper wheel 10. By rotating in the same direction and rotating the pulley 11 in the direction of the arrow, the lifting chain 12 is wound up, and the ring rail 17 connected to this is raised. The ring rail 17 is repeatedly raised and lowered through the lifting chain 12 by the swinging of the lifting lever 14 caused by the rotation of the heart cam 13, and is gradually raised by the mechanism described above to form a yarn.

When the full pipe is reached, a full pipe signal is issued from an automatic counter (not shown), and then the descent time selection limit switch
The main motor stop limit switch LS2 is pressed after LS1 is pressed, so that the power supply to the main motor is stopped and the machine base becomes coasting. Next, the lowering limit switch LS3 is pressed to excite the lowering solenoid 15, and the lever 16 holds the slide clutch 6 in a position where it meshes with the clutch toothed gear 5 against the biasing force of the spring. As a result, the connection between the shaper shaft 7 and the worm 9 is released, and the rotation of the clutch toothed gear 5 is transmitted to the worm 9 via the slide clutch 6, so that the worm 9 and the pulley 9 are connected.
11 and 12 are reversed and the ring rail 17 descends in synchronization with the inertial operation of the machine base. When the ring rail 17 reaches the lowermost portion, the descent completion confirmation limit switch LS4 is pressed, the slide clutch 6 returns to the original position where it meshes with the clutch 8, and the automatic descent of the ring rail 17 is stopped.

As a result of the above-mentioned action, the ring rail 17 which was in the raised position at the time of full filling automatically descends to the lowermost position as shown in Fig. 6 (a), and as shown in Fig. 6 (b), the full thread 18 An inclined winding 19 is formed on the outer circumference. While the ring rail 17 is stopped at the lowermost position, the full yarn 18 continues to rotate with the spindle 20 and the tail spool 21 is formed on the knurled portion of the spindle 20.

This tail bobbin 21 is necessary to securely hold the winding start thread on the newly inserted empty bobbin when the spinning machine is restarted after the doffing. If the holding cannot be achieved, on the other hand, if it is too long, the waste thread increases and its treatment becomes a problem. Therefore, it is desirable to form the tail thread winding 21 wound a predetermined number of times.

Conventionally, as a method of defining the number of times of winding of this tail bobbin, when the limit switch LS2 for stopping the main motor is pressed during the automatic lowering of the ring rail, the power supply to the main motor is stopped, and the machine base enters the coasting operation. At the same time, a timer is operated, and after a predetermined time, a brake is operated to suddenly stop the main motor.

(Problems to be Solved by the Invention) However, in the above-mentioned conventional method, since the machine base is inertially operated when the ring rail is automatically lowered, the machine machine changes due to a change in the condition of the machine machine, that is, a time lapse after periodic cleaning. If the inertia during inertial rotation changes due to a change in the frictional resistance of the platform rotation part or a change in the winding amount per full-thread yarn, the spindle rotation as shown in Fig. 7 (a) The rate of decrease in speed changes. Therefore, there is a difference in the time until the ring rail reaches the lowermost position, and as shown in FIG. 7 (b), the periods in which the tail bobbin is actually formed are X, Y, and Z, respectively. There is a problem that the number of times the tail bobbin is wound is different.

Further, in order to smoothly perform the work at the time of replacing the tube or at the time of exposing the end yarn in the winder in the next step, the number of turns is preferably 1 to 2 when forming the inclined winding. However, in the above-mentioned conventional method, the automatic lowering of the ring rail is started at a high speed of inertial rotation of the main motor after the power supply to the main motor is stopped. There is also a problem that the lifting is slowed down by several times, the slack is generated in the lifting chain 12, the ring rail cannot follow the lowering speed, and the length of the inclined winding becomes long.

Configuration of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, in the present invention, the rotation speed of the main motor is set to be higher than the normal spinning speed at the time of a stop for full pipes or doffing on the way. After holding at a low constant speed,
We adopted a method of lowering the ring rail near the winding start position at a constant speed.

(Operation) In the inclined winding forming method of the present invention, after the rotation speed of the main motor is maintained at a constant speed lower than the normal spinning speed at the time of stopping for full pipe or halfway doffing, the ring rail is kept at a constant speed. It descends near the winding start position. Since the rotation speed of the main motor is lower than the normal spinning speed, the ring rail follows the rotation of the machine base at a constant speed up to the winding start position even when the conventional mechanism is used as it is as the automatic mechanism for lowering the ring rail. Down to form a slanted winding of the desired length.

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIGS. A spinning machine for carrying out the present invention is provided with a ring rail automatic lowering mechanism similar to the conventional apparatus shown in FIG. Further, it is provided with a lowering limit switch LS3 for sending a control signal to a control device for controlling the ring rail automatic lowering mechanism, a lowering completion confirmation limit switch LS4 and a low speed switching limit switch LS5. The main motor (not shown) has a pole number switching motor or an inverter-controlled induction motor capable of switching the drive speed to a constant rotation speed that is at least half or less than that during normal spinning, in addition to the rotation speed during normal spinning. Alternatively, a DC motor or the like is used.

Next, the operation of the device configured as described above will be described. When the winding operation at the normal spinning speed progresses to reach full pipe,
The full contact of the auto counter is closed, then the low speed changeover limit switch LS5 is closed and the main motor M operates at low speed. Next, when the lowering limit switch LS3 is pressed, the lowering solenoid 15 is excited, and the automatic lowering of the ring rail 17 is started as described above. At this time, since the main motor is driven at a constant low speed, the ring rail 17 surely follows the movement of the drive mechanism and descends at a constant speed. When the ring rail 17 descends to a predetermined position near the winding start position,
The descent completion confirmation limit switch LS4 is pressed, the descent solenoid 15 is demagnetized, the slide clutch 6 returns to the original position where it meshed with the clutch 8, and the automatic descent of the ring rail 17 is stopped. Then, the tail rail 21 is formed at a predetermined position below the spindle 20 while the ring rail 17 moves a small amount as the heart cam 13 rotates. Meanwhile, the descent solenoid
At the same time as the demagnetization of 15, the timer TR1 starts counting, and after a lapse of a predetermined time, the timer TR1 times up, the brake operates, and the machine base completely stops.

As described above, since the inclined rail is formed by the ring rail descending at a constant speed after the rotational speed of the main motor reaches a constant rotational speed that is less than half of the normal spinning speed, the inclined winding is used for doffing work or It is formed to have a predetermined length that does not hinder the end yarn from being taken out by the winder.

Second Embodiment Next, a second embodiment will be described with reference to FIG. The apparatus of this embodiment is largely different from the apparatus of the above embodiment in that the lowering of the ring rail 17 is driven by another motor independent of the main motor. That is, in the device of this embodiment, the sprocket wheel 2 constituting the automatic lowering mechanism for transmitting the rotation of the main shaft 1 to the worm 9,
Instead of providing the chain 3, the gear 4, the gear 5 with clutch teeth, the slide clutch 6 and the clutch 8, a pulley 23 that is integrally rotatable via an electromagnetic clutch 22 is provided at the end of the shaper shaft 7, and a descent motor 24 is provided. A belt 26 is wound around the pulley 25 fitted on the drive shaft and the pulley 23. On the other hand, the main motor M is an induction motor whose drive is controlled via the inverter 27.

The inverter 27 is a normal speed setter 28 and a descent speed setter.
The main motor M is drive-controlled based on the 29 setting signals. The signal from the descent speed setting device 29 is input to the inverter 27 via the comparator 32 to which the output signal from the rotation detector 31 that detects the rotation speed of the front bottom roller 30, that is, the spinning speed is input. ing.

In this device, when the full pipe is reached, the full contact of the auto counter closes, and then the low speed changeover limit switch LS5
Is turned on, and the main motor M rotates at a predetermined low speed. The speed of this low speed rotation is set with reference to the rotation speed of the front bottom roller 30 by the rotation detector 31. Next, the lower limit switch LS3 is pressed and the lowering motor 2
4, the electromagnetic clutch 22 is connected, the worm 9 is rotated in the opposite direction, and the ring rail descends at a constant speed set corresponding to the spinning speed at that time. When the descent is completed, the descent completion confirmation limit switch LS
4 is pushed, the lowering motor 24 stops, and the ring rail 17
The tail bobbin 21 is formed at a predetermined position below the spindle 20 while moving a small amount as the heart cam 13 rotates. At the same time as the descent completion confirmation switch LS4 is pressed, the timer TR1 starts counting as in the device of the above embodiment, and after a predetermined time has elapsed, the timer TR1 times out and the main motor M stops and the brake operates. Then the machine base completely stops.

In the device of this embodiment, the speed at the time of lowering the ring rail is set on the basis of the rotation speed of the front bottom roller 30, that is, the spinning speed, so that even if the spinning conditions are changed, the stop for doffing is stopped. The descending speed of the ring rail at that time is always constant, and it is not necessary to adjust the timer TR1 for setting the number of times of the tail bobbin 21 every time the spinning conditions are changed. Further, since the descending motor 24 is provided, the descending gear ring is eliminated, the number of parts can be greatly reduced, the reliability of the device can be greatly improved, and the maintenance work can be facilitated.

Third Embodiment Next, a third embodiment will be described with reference to FIG. The device of this embodiment uses a lifting device previously proposed by the applicant of the present invention (Japanese Patent Application No. 60-270746) as a lifting mechanism for the ring rail, instead of the conventional mechanism based on the swing of the lever by a heart cam. In addition, a main motor and a separate lowering motor are used for lowering the ring rail when stopping for doffing. In the lifting device, a line shaft 33 is rotatably arranged along the machine longitudinal direction, and a large number of screw gears 34 and bevel gears 35 are fitted on the line shaft 33 at predetermined intervals so as to be integrally rotatable. On the other hand, on the spindle rail (not shown), a poker pillar 36 as a support for supporting the ring rail 17 is supported slidably in the vertical direction via a slide guide (not shown), and a nut body 37 is provided below the slide guide. It is rotatably supported on the spindle rail. A screw portion 36a formed in the lower portion of the poker pillar 36 is screwed into the nut body 37, and a screw gear 38 that meshes with the screw gear 34 is fitted and fixed to the lower end. Further, the poker pillar 40 supporting the lappet angle 39 is supported by a slide guide (not shown) so as to be slidable in the vertical direction with respect to a machine frame (not shown). Poker pillar 40
Is rotatably supported with respect to the frame, and a nut body 42 having a bevel gear 41 that meshes with the bevel gear 35.
The lower end screw portion 40a is screwed into the. The rotation transmitted from the front bottom roller 30 via the gear trains 43 and 44 is applied to the clutch 4 installed in the gear train 44.
The line shaft 33 is converted into normal / reverse rotation drive via 5, 46, and the ring rail 17 and the lappet angle 39 are moved up and down in response to the forward / reverse rotation of the line shaft 33. A pulley 48 is integrally rotatably attached to an end of a rotary shaft 47 equipped with the clutches 45 and 46 via an electromagnetic clutch 22, and the pulley 48 and a pulley fitted to a drive shaft of a descending motor 24. Belt 50 is wound between 49.

In this device, during the normal spinning operation, the lowering motor 24
Is stopped, the electromagnetic clutch 22 is also demagnetized, and the rotation of the front bottom roller 30 on the rotating shaft 47 is reduced by the gear train 43, 44, the clutch 45,
It is transmitted via 46, and the ring rail is moved up and down. Then, when stopping for doffing, the rotation speed of the main motor is first switched to a predetermined low speed, and then the clutches 45, 46 are disengaged by the ON signal of the descent limit switch to rotate from the front bottom roller 30. The transmission of rotation to the shaft 47 is cut off, the descending motor 24 is driven and the electromagnetic clutch 22 is excited, the rotating shaft 47 is driven by the descending motor 24, and the ring rail 17 starts descending. Then, when the ring rail 17 descends to a predetermined position, the descending completion confirmation switch is pressed and the descending motor 24 stops, and at the same time, the timer starts counting. Then, as in the case of the above-described embodiment, after a lapse of a predetermined time, the timer expires and the power supply is stopped, and the brake is activated to completely stop the machine base. Therefore, even when the apparatus of this embodiment is used, the inclined winding having a predetermined length is formed and the tail thread winding also has a constant number of windings as in the above-described embodiments.

The present invention is not limited to the above-described embodiments, and for example, when the device using the descending motor 24 is used as the ring rail descending mechanism as in the second and third embodiments, the ring rail 17 is used. The lowering speed of the main motor, that is, the lowering speed of the main motor can be set based on the rotation speed of the spindle without setting the spinning speed as a reference, and the rotation speed of the lowering motor can be set by an inverter. A low speed is set as a standard, the descent motor is controlled to a constant speed compared to the spinning speed to lower the ring rail, or a drive driven by the main motor instead of using a variable speed motor as the main motor. A transmission that uses a multi-stage pulley on its shaft, a V-belt type continuously variable transmission, a ring cone type differential type transmission, etc. is installed to provide normal rotation speed and low speed rotation when the ring rail descends. Or to perform the switching of the time,
It may be applied when the doffing is stopped on the way other than when the pipe is full, or the counting of the timer may be started when the descent is started instead of when the descent is completed.

Effect of the Invention As described in detail above, according to the present invention, after the machine is stopped for full pipe or doffing on the way, the rotation speed of the main motor is maintained at a constant speed lower than the normal spinning operation speed. ,
Since the ring rail is lowered at a constant speed, the length of the slant winding is constant and the length of the tail bobbin is also constant, so that the pipe replacement work or restart after pipe replacement is performed smoothly, and the end of the winder It has an excellent effect that the yarn is smoothly released.

[Brief description of drawings]

FIGS. 1 and 2 show a first embodiment embodying the invention of FIG. 1, wherein FIG. 1 is a diagram showing changes in height of a ring rail and motor rotation speed with time, and FIG. 2 is a ring. FIG. 3 is a schematic perspective view showing a rail elevating mechanism, FIG. 3 is a schematic perspective view showing a ring rail elevating mechanism of the second embodiment, and FIG. 4 is a schematic perspective view showing a ring rail elevating mechanism of the third embodiment. FIG. 6 is a schematic perspective view showing a ring rail lifting mechanism of a conventional device, FIGS. 6 (a) and 6 (b) are side views showing a position change of the ring rail when the pipe is stopped, and FIG. 7 (a) is a coasting rotation. FIG. 7 (b) is a diagram showing a difference in reduction of the spindle rotation speed due to a difference in inertia of time, and FIG. 7 (b) is a diagram showing a time change of the ring rail position when the conventional device is stopped. Ring rail 17, inclined winding 19, descending motor 24, main motor M, low speed changeover limit switch LS5.

Claims (2)

[Claims] 1. In a spinning machine such as a ring spinning machine and a ring twisting machine, the rotation speed of a main motor is maintained at a constant speed lower than a normal spinning speed at the time of stopping for doffing, and then the ring rail is maintained at a constant speed. A method for forming a slanted winding in a spinning machine, which descends to the vicinity of a winding start position. 2. The inclined winding forming method for a spinning machine according to claim 1, wherein the ring rail elevating mechanism is driven by another motor independent of the main motor when the ring rail descends.