Field of the Invention
[0001] The present invention relates a multiple twister for driving a drum for rotating
a winding package and a traverse device for traversing a twisted yarn to be wound
around the winding package by common driving means.
Background of the Invention
[0002] In a conventional two for one twister which is a typical example of a multiple twister,
a yarn released from a yarn supply package is put into a spindle rotating at a high
speed, and twisting is imparted while a tensile stress is imparted adequately by means
of a tension device and ballooning is performed by means of a rotating disc mounted
to the spindle. Then a twisted yarn is fed to a traverse device by means of a feed
roller, and the yarn to be wound on a bobbin rotating in contact with a rotating drum
is formed in a winding package.
[0003] In a driving system of this two for one twister, as shown in Figure 5, an output
of a first motor 81 driven by a command from a controller 80 is transmitted by means
of a driving system comprising a plurality of pulleys, a belt, and a speed reducer
to drive a spindle 82, a feed roller 83 and a drum 84.
Further, a traverse device 85 is driven by the transmission of an output of a second
motor 86 driven by another command from the controller 80 ,the transmission by of
means of a driving system comprising a plurality of pulleys, a belt and cam box. When
an induction motor rotating according to an output frequency from an inverter 87 is
used for the second motor 86, acceleration and deceleration can be performed arbitrarily.
Therefore, the rotation speed of the induction motor is periodically switched between
the upper and lower limits, and ribbon break can be performed by a disturb function
driven at a traverse speed at which the speed of the traverse device 85 are periodically
varied.
[0004] In a conventional multiple twister, however, there are provided the first motor 81
for driving the drum 84 and the second motor 86 for driving the traverse device 85,
independently. Therefore, if the outputs of the motors 81 and 86 each are interrupted
simultaneously during stoppage of the multiple twister, the traverse device 85 having
a small inertial force stops more before the drum 84 having a greater inertial force
stops. As a result, if the drum 84 is continuously driven with respect to the inactive
traverse device 85, there is a danger of a end missing that a twisted yarn slips off
from a winding package P, or a straight winding that a twisted yarn around the winding
package P is wound around one section.
[0005] It is an object of the present invention to prevent the end missing of the twisted
yarn or the straight winding at the time of stoppage by driving a traverse device
and a drum by common driving means and synchronizing the traverse device with driving
of the drum.
Summary of the Invention
[0006] To solve the above problems, there is provided a multiple twister as claimed in claim
1 according to the present invention, comprising a spindle driving system of a spindle
apparatus for twisting a yarn, a drum driving system for rotating a winding package
for winding the twisted yarn and a traverse driving system of a traverse device for
traversing the twisted yarn to be wound around the winding package. The spindle driving
system, the drum driving system and the traverse driving system are driven by a common
driving means, and the drum driving system and the traverse driving system are coupled
with each other via non-step transmission for applying disturbance by making a traverse
speed of the traverse device variable.
[0007] Thereby, during stoppage of each system, the traverse speed of the traverse device
can be made variable by non-step transmission so as to synchronize with drum rotation.
In addition, by the non-step transmission, the traverse speed of the traverse device
is made continuously variable between high and low speeds, thereby making it possible
to wind a twisted yarn while disturbing it.
[0008] Further, the spindle driving system, the drum driving system and the traverse driving
system are driven by the common driving means so as to certainly maintain synchronization
of each driving system during general acceleration and deceleration or during deceleration
at the time of electric interruption. Thereby, package quality improvement can be
achieved, and cut yarn due to excessive twisting can be certainly prevented.
[0009] In claim 2, said non-step transmission as claimed in claim 1 accelerates the traverse
speed of the traverse device step by step according to the winding quantity of the
winding package and applies disturbance by making the traverse speed continuously
variable between high and low speeds merely in a time zone in which a constant speed
is achieved after acceleration.
[0010] Thereby, when the traverse speed of the traverse device is accelerated step by step,
a winding angle that changes according to the winding quantity of the winding package
can be corrected. Alternatively, when the traverse speed is made continuously variable
between high and low speeds in a constant-speed time zone, the twisted yarn can be
wound around the winding package while it is disturbed.
[0011] In claim 3, the non-step transmission as claimed in claim 1 or claim 2 is provided
with a pair of pulleys coupled with each of the driving means side and the traverse
driving system and an endless belt to be wound around each pulley, each pulley having
a taper face following taper faces formed on both sides of the endless belt and comprising
two taper bodies arbitrarily drawn together and separated from each other, one of
these pulleys being provided with drawing and separating means for forcibly drawing
together and separating one taper body to/from another.
[0012] Thereby, when each taper body interval of one pulley is forcibly adjusted by the
drawing and separating means, the endless belt is changed to a diameter according
that interval. Further, each taper body interval of the other pulley is changed in
according therewith, and the diameter of the endless belt is changed. Therefore, the
traverse speed of the traverse device can be made variable appropriately due to such
change in the diameter of the endless belt.
[0013] In claim 4, said non-step transmission as claimed in any one of claims 1 to 3 is
provided with a reversible motor, a sensor for detecting a traverse speed, and a controller,
the controller applying disturbance by switching forward and backward rotation of
the reversible motor according to the detected traverse speed.
[0014] Thereby, an actual traverse speed is detected, and variable control of disturbance
can be performed, thus making it possible to perform simple and precise disturbance
merely by forward and backward rotation of the reversible motor.
Brief Description of the Drawing
[0015] Figure 1 is a schematic view showing a multiple twister.
[0016] Figure 2 is an enlarged view showing a structure of a non-step transmission employed
for the multiple twister.
[0017] Figure 3 is a graph showing traversing operation of a traverse device of the multiple
twister.
[0018] Figure 4 is a graph showing a relationship between a winding angle and a time of
the traverse device of the multiple twister.
[0019] Figure 5 is a schematic view showing a conventional multiple twister.
Detailed Description of the Preferred Embodiments
[0020] Hereinafter, a multiple twister in embodiments of the present invention will be described
with reference to Figures 1 to 4.
[0021] In Figure 1, a multiple twister 1 is provided with one spindle unit formed of a spindle
apparatus 2 and a winding apparatus 3 positioned on the spindle apparatus 2, and is
disposed in horizontal array on the back to form 80 to 304 spindle units as a whole.
This multiple twister 1 is provided with the devices 2 and 3, a driving motor 5 (driving
means), a spindle driving system A driven by the driving motor 5, a drum driving system
B and a traverse driving system C both of which are driven by the driving motor 5
and a controller 6. The spindle apparatus 2 comprises a cover 7 where a yarn supply
package is loaded and a spindle 8 coupled with the spindle driving system A. A winding
apparatus 4 comprises a drum 9 with which a winding package P is pressed and a feed
roller 10 and which are driven by the drum driving system B and a traverse device
11 traversed by a traverse driving system C.
[0022] The driving motor 5 is an induction motor and is driven by a rotation speed determined
by an output frequency from an inverter (not shown in the drawin) connected to the
controller 6 to drive the spindle driving system A and to drive the drum driving systems
B and the traverse driving system C via a speed change belt device 12, a speed reducer
13 and a non-step transmission 14.
[0023] The spindle driving system A has a belt 19 wound around a first pulley 15 provided
at an output shaft of the driving motor 5 and a second pulley 16 of a shaft 21 provided
in parallel to the driving motor 5, and a tangential belt 20 is wound between a third
pulley 17 of the shaft 21 and a fourth pulley 18. The tangential belt 20 is transferred
in contact with the spindle 8 of each spindle apparatus 2, and driving of the driving
motor 5 is transmitted to each spindle 8 by means of each of the pulleys 15 to 18
and a belt 19 and then is rotated.
[0024] The drum driving system B has a belt 28 wound around a fifth pulley 22 provided at
an output shaft between the driving motor 5 and the first pulley 15 and a sixth pulley
23 of a shaft 27 provided in parallel to the shaft 21. The shaft 21 is coupled with
the speed reducer 13 via a belt 29 wound around seventh and eighth pulleys 24 and
25 of the speed change belt device 12 (no-step transmission). The speed reducer 13
has a plurality of gears disposed therein and these gears are decelerated by inputting
rotational force from an input shaft 30 provided with the eighth pulley 25 of the
speed change belt device 12. At the same time, a rotational direction is changed.
[0025] In addition, the speed reducer 13 has three output shafts 31a to 31c and is a three-shaft
output by a single-shaft input. A ninth pulley 26 is engagingly mounted to each of
the parallel two output shafts 31a and 31b, and the traverse driving system C is coupled
with the remaining output shaft 31c. A belt 36 is wound around each of the ninth pulley
26, a tenth pulley 33 engagingly mounted to a support shaft 32, and an eleventh pulley
35 engagingly mounted to a support shaft 34. The drum 9 is engagingly mounted to the
support shaft 32 with a given interval, and the feed roller 10 is engagingly mounted
to the support shaft 34 with a given interval. The outputs of the driving motor 5
are transmitted to the support shafts 32 and 34 of the drum 9 and the feed roller
10, respectively, via the belt 28, the speed change belt device 12, the speed reducer
13 and the belt 36.
[0026] The traverse driving system C has the non-step transmission 14 coupled with the speed
reducer 13 and the non-step transmission 14 is continuous to a cam box 40. The cam
box 40 has a gear 42 at a transmission shaft 41 coupled with the non-step transmission
14 and is provided with a grooved drum 44 coupled with a gear 43 to be geared with
the gear 42. The grooved drum 44 is formed of a spiral-pattern cam groove 45 and a
cam shoe 46 is engaged with the cam groove 45. A reciprocating rod 47 is secured to
the cam shoe 46, and the transverse device 11 is secured to the reciprocating rod
47 with a given interval. An output of the driving motor 5 is transmitted from the
non-step transmission 14 to the grooved drum 44 of the cam box 40 via the speed change
belt device 12 and the speed reducer 13, the cam shoe 46 is moved along the cam groove
45 by rotation of the grooved drum 44, and thereby the traverse device 11 is reciprocated
and traversed.
[0027] The controller 6 is connected to the driving motor 5, an input board 60, a reversible
motor 53 (drawing and separating means) of the non-step transmission 14, a control
motor 61 of the speed change belt device 12, a drum proximity sensor 62 and a traverse
proximity sensor 63, respectively. The input board 60 inputs to the controller 6 data
such as conditions of the traverse device 11 (winding angle θ, traverse speed v and
disturbance swing width h), number of twists N, rotation speed of the spindle and
rotation speed of the drum 9. The proximity sensor 62 detects rotation of a target
body 64 of the shaft 32 to monitor an actual rotation speed of the drum 9 and outputs
it to the controller 6. Alternatively, the proximity sensor 63 detects rotation of
a target body 65 of the grooved drum 44 to monitor the winding angle θand the traverse
speed v of the traverse device 11 and outputs it to the controller 6. The controller
6 controls driving of the driving motor 5, the reversible motor 53 and the control
motor 61 by means of data inputted from the input board 60 and detection fed back
from each of the proximity sensors 62 and 63.
[0028] Now, in Figure 2, with reference to a concrete structure of the non-step transmission
14, the non-step transmission 14 comprises an input side pulley 50 provided at an
output shaft 31c of the speed reducer 13, an output side pulley 51 provided at a transmission
shaft 41 of the cam box 40, an endless belt 52 wound between the pulleys 50 and 51,
and the reversible motor (forward and backward rotation motor). The pulleys 50 and
51 comprises outer and inner washers (taper bodies) 54 and 55, and the insides of
the washers 54 and 55 are formed on taper faces, respectively. A holder is securely
mounted to the inner washer 55 of the input side pulley 50. An output shaft 56 of
the reversible motor 53 is coupled with the holder via a clutch 57 and the inner washer
55 of the input side pulley 50 is axially moved to the outer washer 54 fixed to the
output shaft 31c by forward and backward rotation of the motor 53. The outer washer
55 of the output side pulley 51 is provided with a spring box 58. A biasing spring
59 biasing the outer washer 55 toward the inner washer 55 fixed to the transmission
shaft 41 is disposed inside of the spring box 58. The endless belt 52 having taper
faces on both ends following the taper faces of the washers 54 and 55 are wound around
each of the pulleys 50 and 51.
[0029] When the reversible motor 53 is forward rotated, the inner washer 55 of the input
side pulley 50 is moved toward the outer washer 54 so as to narrow an interval and
a distance. Therefore, a winding diameter of the endless belt 52 of the input side
pulley 50 increases. Accordingly, the outer washer 54 of the output side pulley 51
is moved against spring force of the biasing spring 59 to widen an interval and a
distance with respect to the inner washer 55. Therefore, the winding diameter of the
endless belt 52 of the output side pulley 51 decreases. When the reversible motor
53 is rotated backward, the inner washer 55 of the input side pulley 50 decreases
to widen an interval and a distance from the outer washer 54. The winding diameter
of the endless belt 52 of the input side pulley 51 decreases. Accordingly, the outer
washer 54 of the output side pulley 51 is moved by spring force of the biasing spring
59 so as to narrow an interval and a distance with respect to the inner washer 55.
Therefore, the winding diameter of the endless belt 52 of the output side pulley 51
increases.
[0030] Thus, the non-step transmission 14 changes a rotation speed output from the output
side pulley 51 to the cam box 40 and varies the traverse speed of the traverse device
11 via the cam box 40 by changing the winding diameter of the endless belt 52 with
respect to each of the pulleys 50 and 51 through forward and backward rotation of
the reversible motor 53.
[0031] The multiple twister 1 of the present invention is constructed as described above.
Now, an operation of multiple twister 1 will be described.
[0032] The controller 6 receives data such as spindle rotation speed, drum rotation speed,
winding angle θ and traverse speed v with respect to the traverse device 11, and disturbance
width h of the twisted yarn and so on from the input board 60, and drives the driving
motor 5 based on these data. When the driving motor 5 is driven, its output is transmitted
to the spindle apparatus 11 via the spindle driving system A. The yarn to be released
from a yarn supply package enters a tension device (not shown in the drawings), a
given tensile stress is imparted. Then, the yarn is ballooned on a rotating disc of
the spindle 8 rotating at a high speed and reaches a balloon guide. One twist is applied
from the tension device to the rotating disc, and another twist is applied from the
rotating disc to the balloon guide and reaches the feed roller 10.
[0033] An output of the driving motor 5 is transmitted via the drum driving system B and
the traverse driving system C, the feed roller 10 and the drum 9 is rotated, and the
traverse device 11 is traversed. Thereby, the twisted yarn from the spindle apparatus
2 reaching the feed roller 10 is wound around the winding package P pressed by the
drum 9 traversed by the traverse device 11.
[0034] With respect to winding of the twisted yarn, the traverse device 11 winds such yarn
depending on the traverse speed v and the disturbance width h shown in Figure 3 and
depending on a winding angle θ shown in Figure 4. That is, the traverse conditions
of the traverse device 11 is determined by controlling the non-step transmission 14
based on information such as the winding angle θ due to the proximity sensor 63 continuously
fed back to the controller 6 and the traverse speed v. One period of the winding angle
in Figure 4 corresponds to that of disturbance in Figure 3, and disturbance is performed
for the winding angle to swing at a width of 7%.
[0035] In this state, the pulleys 50 and 51 of the reversible motor 53 of the no-step transmission
14 are fixed. As shown in Figure 3, the traverse speed v of the traverse device 11
is accelerated from the beginning of driving of the driving motor 5 to a time t1 while
a constant speed relationship with respect to the drum 9 is maintained. The reversible
motor 53 of the non-step transmission 14 is rotated forward and backward at time t2
at which a constant speed is achieved. A diameter of each of the pulleys 50 and 51
is increased and decreased with respect to the endless belt 52, the traverse speed
v of the traverse device 11 is made constantly variable within a certain range between
low and high speeds, and thereby the twisted yarn Y is wound around the winding package
P while it is disturbed at a width h, as shown in Figure 3. Thus, the traverse speed
v of the traverse device 11 is accelerated step by step, and the yarn is disturbed
merely in time zones t2, t3, t4... at which a contact speed is achieved after acceleration.
A yarn is disturbed merely in time zones t2, t3, t4... at which a constant speed other
than acceleration is achieved because it is difficult to make it variable between
high and low speeds for disturbance while the traverse speed v is accelerated step
by step by means of the non-step transmission 14.
[0036] Thereby, the winding angle θ changing according to a winding quantity of the twisted
yarn Y to be wound around the winding package P can be corrected to the setting, and
a ribbon can be prevented from being produced at the winding package P due to disturbance.
[0037] When the multiple twister 1 is stopped, the traverse speed v of the traverse device
11 is synchronized with rotation of the drum 9. That is, the controller 6 is employed
by controlling the non-step transmission 14 using the procedure similar to that shown
in Figure 3 based on an a actual rotation speed of the drum 9 fed back from the proximity
sensor 62. Further, the reversible motor 53 of the non-step transmission 14 is rotated
forward and backward, the diameter of the endless belt 52 is increased or decreased
with respect to each of the pulleys 50 and 51, and thereby the traverse speed v of
the traverse device 11 is decelerated and is synchronized with rotation of the drum
9 while a constant speed relationship is maintained.
[0038] Thereby, the traverse device 11 and the drum 9 can be stopped simultaneously, and
the end missing or the straight winding during stoppage can be prevented.
[0039] According to the multiple twister of the present invention, the drum driving system
of the drum rotating a winding package is coupled with the traverse driving system
of the traverse device traversing the twisted yard to be wound around the winding
package via the non-step transmission and is driven by common driving means. During
stoppage of each system, the traverse speed of the traverse device is made variable
so as to synchronize with rotation of the drum, therefore, the traverse device and
the drum can be stopped simultaneously, thereby making it possible to prevent the
end missing or the straight winding during stoppage.
[0040] With the non-step transmission, the traverse speed of the traverse device is accelerated
step by step according to a winding quantity of the winding package, and the traverse
speed is made continuously variable between high and low speeds merely in a time zone
at which a constant speed is achieved after acceleration. Thus, the winding angle
varied by a winding quantity of a twisted yarn due to the winding package can be corrected,
and the twisted yarn can be wound while it is disturbed. Therefore, a ribbon of the
winding package around which a twisted yarn is wound is prevented from being generated,
thereby making it possible to provide a good-quality winding package.
[0041] Further, said non-step transmission comprises the endless belt, a plurality of pulleys
comprising two taper bodies that drawn together and separated from each other arbitrarily,
and drawing and separating means for forcibly drawing together and separating each
of the taper bodies of one pulley. When each taper body interval of one pulley is
forcibly adjusted by the drawing and separating means, the endless belt is changed
to a diameter according to that interval, and each taper body interval of the other
pulley changes in conformity therewith, and the diameter of the endless belt is changed.
Therefore, the traverse speed is made variable appropriately by change in the diameter
of this endless belt. Since the taper face of the pulley can be brought into contact
with the taper faces on both sides of the endless belt, slippage is reduced even if
tensile stress of the endless belt is weak, the service life of the endless belt is
extended, and power transmission precision is enhanced.
1. Mehrfachzwimmaschine (1), bestehend aus einem Spindelantriebssystem (A) eines Spindelgeräts
(2) zum Verdrillen eines Fadens, einem Trommelantriebssystem (B) zum Drehen einer
Auflaufspule (P) zum Spulen eines verdrillten Fadens und einem Traversierantriebssystem
(C) einer Traversiervorrichtung zum Traversieren des verdrillten Fadens, der um die
Auflaufspule (P) gespult werden soll, wobei das Spindelantriebssystem (A), das Trommelantriebssystem
(B) und das Traversierantriebssystem (C) von einer gemeinsamen Antriebseinrichtung
angetrieben sind, und das Trommelantriebssystem (B) und das Traversierantriebssystem
(C) miteinander über ein stufenloses Getriebe gekuppelt ist, um durch Bewirken einer
Abweichung die Traversiergeschwindigkeit der Traversiervorrichtung (11) variabel zu
machen.
2. Mehrfachzwirnmaschine nach Anspruch 1, bei der das stufenlose Getriebe die Traversiergeschwindigkeit
der Traversiervorrichtung schrittweise entsprechend der Spulenmenge einer Auflaufspule
beschleunigt, und die Traversiergeschwindigkeit zwischen hohen und niedrigen Geschwindigkeiten
nur in einer Zeitzone kontinuierlich variabel macht, in der eine konstante Geschwindigkeit
nach Beschleunigung erreicht wird, um die Abweichung zu bewirken.
3. Mehrfachzwirnmaschine nach Anspruch 1 oder 2, bei der das stufenlose Getriebe mit
zwei Riemenscheiben, die jeweils mit der Antriebseinrichtungsseite und dem Traversierantriebssystem
gekuppelt sind und mit einem über jede Riemenscheibe laufenden Endlosriemen versehen
ist, wobei jede Riemenscheibe zwei Kegelkörper hat, die jeweils eine Schrägfläche
aufweisen, die einer der Schrägflächen folgt, die auf beiden Seiten des Endlosriemens
gebildet sind, und die gegeneinander gezogen und voneinander getrennt werden, und
bei der eine dieser Riemenscheiben mit einer Zusammenzieh- und Trenneinrichtung versehen
ist, um jeden Kegelkörper zwangsläufig zusammenzuziehen und zu trennen.
4. Mehrfachzwimmaschine nach einem der Ansprüche 1 bis 3, bei der das stufenlose Getriebe
mit einem Umkehrmotor, einem Sensor zur Ermittlung der Traversiergeschwindigkeit und
einer Steuerung versehen ist, wobei die Steuerung die Abweichung durch Vor- und Zurückschalten
der Drehung des Umkehrmotors entsprechend einer ermittelten Traversiergeschwindigkeit
bewirkt.