BACKGROUND OF THE INVENTION
[0001] The present invention relates to a yarn sending device configured to send yarns and
a false-twist texturing machine including the yarn sending device.
[0002] A known yarn sending device is configured to send yarns while sandwiching the yarns
between drive rollers and driven rollers in a yarn processor including a crimp processing
part configured to crimp the yarns made of synthetic fibers. For example, Patent Literature
1 (
Japanese Laid-Open Patent Publication No. H1-132843) discloses a false-twist texturing machine including a yarn sending device having
(i) drive rollers fixed to a shaft which is rotatably driven and (ii) driven rollers
in contact with circumferential surfaces of the drive rollers. In this yarn sending
device, yarns are sandwiched between the drive rollers and the driven rollers. Furthermore,
as the drive rollers is rotated, the yarns are sent.
SUMMARY OF THE INVENTION
[0003] Patent Literature 1 discloses a so-called nip-roller type yarn sending device configured
to send yarns while sandwiching the yarns between drive rollers and driven rollers.
With this arrangement, when a contact state between circumferential surfaces of the
drive rollers and circumferential surfaces of the driven rollers is not appropriate,
the yarns may slip. To avoid the slipping of the yarns, it is required to adjust the
drive rollers to be exactly in parallel to the driven rollers. This makes maintenance
laborious.
[0004] In this regard, it is conceivable to send the yarns not by means of the nip-roller
type yarn sending device but by means of godet rollers which are rotationally driven
by motors. In this case, each yarn is not sandwiched between two rollers but is simply
wound onto a circumferential surface of one of the godet rollers. Therefore, the maintenance
for maintaining the two rollers to be in parallel to each other is not required. However,
the number of the godet rollers with the motors is required to be the same as that
of the yarns. This results in cost increase.
[0005] The present invention has been made in view of this problem. An object of the present
invention is to provide a yarn sending device which is able to reduce the burden of
maintenance and to achieve cost reduction.
[Solution to Problem]
[0006] A yarn sending device of the present invention is provided in a yarn processor including
a crimp processing part configured to crimp at least one yarn made of synthetic fibers,
the yarn sending device comprising: drive rollers fixed to a drive shaft which is
rotationally driven; and driven rollers which are rotated by making contact with circumferential
surfaces of the drive rollers and receiving a rotational force from the drive rollers.
At a part of each of the driven rollers in an axial direction of the each of the driven
rollers, a rotational force receiver configured to make contact with a circumferential
surface of corresponding one of the drive rollers and a yarn feeding unit which is
configured not to make contact with the circumferential surface of the corresponding
one of the drive rollers and onto which the at least one yarn is wound are formed.
[0007] With this arrangement, the drive rollers are fixed to the drive shaft. It is therefore
possible to rotate the drive rollers by using a single driving source configured to
rotationally drive the drive shaft. Cost reduction is therefore achieved. The each
of the driven rollers includes the rotational force receiver configured to make contact
with the circumferential surface of the corresponding one of the drive rollers and
the yarn feeding unit configured not to make contact with the circumferential surface
of the corresponding one of the drive rollers. As the each of the driven rollers is
rotated by receiving the rotational force of the corresponding one of the drive rollers
via the rotational force receiver, the at least one yarn wound onto the yarn feeding
unit is sent to the downstream side in a yarn running direction. Although it is required
to remain an appropriate contact state between each of the drive rollers and the rotational
force receiver of the each of the driven rollers, fine adjustment such as that in
a nip-roller type yarn sending device is not required. This is because the at least
one yarn is not sent while being sandwiched between the each of the drive rollers
and the each of the driven rollers. As a result, the burden of maintenance is reduced.
As such, the above-described arrangement makes it possible to reduce the burden of
maintenance and to achieve cost reduction.
[0008] In the present invention, the each of the driven rollers and the corresponding one
of the drive rollers may form a pair, a large diameter portion and a small diameter
portion which is smaller in outer diameter than the large diameter portion may be
formed in one roller among the pair of the each of the driven rollers and the corresponding
one of the drive rollers, and the large diameter portion may be configured to make
contact with a circumferential surface of the other roller among the pair of the each
of the driven rollers and the corresponding one of the drive rollers.
[0009] With this arrangement, there is a space between a circumferential surface of the
small diameter portion of the one roller and a part of a circumferential surface of
the other roller. The part of the circumferential surface of the other roller opposes
the small diameter portion. Therefore, when the at least one yarn is wound onto the
circumferential surface of the small diameter portion of the one roller or onto the
part of the circumferential surface of the other roller which opposes the small diameter
portion, the at least one yarn is sent on account of a holding force, i.e., a friction
force of the at least one wounded yarn without being sandwiched between the one roller
and the other roller.
[0010] In the present invention, the small diameter portion in the axial direction may be
larger than the large diameter portion in the axial direction.
[0011] With this arrangement, the small diameter portion is able to have a large part onto
which the at least one yarn is wounded. As a result, yarn threading is facilitated.
[0012] In the present invention, the one roller may be structured so that the large diameter
portion is attachable to and detachable from the small diameter portion.
[0013] When the large diameter portion of the one roller is worn as a result of contact
with the other roller, the number of rotations of the each of the driven rollers changes
so that the conveyance speed of conveying the at least one yarn changes. With the
above-described arrangement, when the large diameter portion is worn, the change of
conveyance speed of conveying the at least one yarn is avoided by performing replacement
of the large diameter portion.
[0014] In the present invention, at least a part of the small diameter portion formed in
the one roller may be provided to oppose a circumferential surface of the other roller.
[0015] For example, when the at least one yarn is thick, the at least one yarn is stably
sent by a nip-roller type yarn sending device. As such, the type of an appropriate
yarn sending device changes depending on the type of the at least one yarn. With the
above-described arrangement, when the large diameter portion is detached from the
small diameter portion, the yarn sending device is usable as the nip-roller type yarn
sending device configured to send the at least one yarn while sandwiching the at least
one yarn between the small diameter portion and the other roller. This makes it possible
to provide the yarn sending device which is appropriate for various types of yarns.
When the large diameter portion is detached from the small diameter portion in one
or some of the driven rollers, the various types of yarns are simultaneously sent
by the single yarn sending device.
[0016] In the present invention, the large diameter portion and the small diameter portion
may be formed in the each of the driven rollers, the large diameter portion may function
as the rotational force receiver, and the small diameter portion may function as the
yarn feeding unit.
[0017] According to this, a level difference is formed between the large diameter portion
and the small diameter portion. This makes it possible to prevent the at least one
yarn wounded onto the small diameter portion from moving to the large diameter portion.
It is therefore possible to prevent the at least one yarn from being unintentionally
sandwiched between the large diameter portion and the each of the drive rollers.
[0018] In the present invention, a fixing shaft which rotatably supports the each of the
driven rollers and a supporter which supports the fixing shaft may be provided in
the each of the driven rollers, and the fixing shaft may be fixed to the supporter
so as to be attachable to and detachable from the supporter.
[0019] With this arrangement, replacement of the each of the driven rollers is easily performed
in such a way that the fixing shaft is detached from the supporter along with the
each of the driven rollers.
[0020] In the present invention, both the large diameter portion and the small diameter
portion may be formed in the each of the driven rollers.
[0021] With this arrangement, a space required for providing a unit including the each of
the driven rollers, the fixing shaft, and the supporter is small as compared to a
case where the large diameter portion and the small diameter portion are formed in
different driven rollers. As the fixing shaft is detached from the supporter along
with the each of the driven rollers, the large diameter portion and the small diameter
portion are simultaneously detached.
[0022] In the present invention, the each of the driven rollers may be structured so that
a ring-shaped member is attached to a circumferential surface of a cylindrical roller
main body and, in the roller main body, a part to which the ring-shaped member is
attached may function as the large diameter portion and a part to which the ring-shaped
member is not attached may function as the small diameter portion.
[0023] With this arrangement, for example, when the large diameter portion is worn, the
worn ring-shaped member is detached from the roller main body and a new ring-shaped
member is attached to the roller main body. This facilitates replacement of the large
diameter portion.
[0024] In the present invention, the large diameter portion may be formed of a central portion
and an outer circumferential portion which is detachably attached to a circumferential
surface of the central portion.
[0025] With this arrangement, for example, when the large diameter portion is worn, replacement
is performed not for the entire large diameter portion but only for the outer circumferential
portion. Therefore, running costs are reduced.
[0026] In the present invention, the large diameter portion may be attached to an end face
of the small diameter portion in the each of the driven rollers.
[0027] When the large diameter portion is formed of the ring-shaped member described above,
the ring-shaped member may be broken because the strength of the ring-shaped member
is insufficient. Meanwhile, when the large diameter portion is attached to the end
face of the small diameter portion, the large diameter portion is shaped as a disc
to improve the strength of the large diameter portion.
[0028] In the present invention, the driven rollers may be respectively replaceable with
cylindrical rollers each of which has a constant outer diameter.
[0029] With this arrangement, when the each of the driven rollers each of which is configured
to send the at least one yarn by means of the small diameter portion without sandwiching
the at least one yarn is replaceable with a roller which is configured to send the
at least one yarn while sandwiching the at least one yarn with one of the drive rollers,
the yarn sending device which is appropriate for various types of yarns is provided.
When one or some of the driven rollers is/are replaced with one or some of the cylindrical
rollers each of which has a constant outer diameter, the various types of yarns are
simultaneously sent by the single yarn sending device.
[0030] In the present invention, the each of the driven rollers in the axial direction may
be larger than each of the drive rollers in an axial direction of the each of the
drive rollers and, in the each of the driven rollers, a part which is in contact with
a circumferential surface of the corresponding one of the drive rollers may function
as the rotational force receiver and a part which is not in contact with the circumferential
surface of the corresponding one of the drive rollers may function as the yarn feeding
unit.
[0031] With this arrangement, the driven rollers and the drive rollers are cylindrical in
shape. Therefore, the structures of the driven rollers and drive rollers are simplified
as compared to a case where the large diameter portion and the small diameter portion
are formed in the each of the driven rollers or the each of the drive rollers.
[0032] In the present invention, a circumferential surface of the yarn feeding unit may
be made of metal.
[0033] When the circumferential surface of the yarn feeding unit is worn as a result of
friction with the at least one yarn, the at least one yarn may get damaged or may
not be reliably sent. When the circumferential surface of the yarn feeding unit is
made of metal, wearing of the circumferential surface of the yarn feeding unit is
preferably suppressed.
[0034] In the present invention, a circumferential surface of the rotational force receiver
may be made of a material a friction coefficient of which is larger than a friction
coefficient of a material of the circumferential surface of the yarn feeding unit.
[0035] With this arrangement, when the rotational force receiver is in contact with a circumferential
surface of the each of the drive rollers, the rotational force receiver further reliably
receives the rotational force from the each of the drive rollers.
[0036] The yarn sending device of the present invention may further include a detector configured
to detect the number of rotations of the each of the driven rollers.
[0037] When the rotational force is transmitted as a result of the contact between the
each of the drive rollers and the each of the driven rollers, the number of rotations
of the each of the driven rollers may change because of wearing of the each of the
driven rollers. In this regard, when the detector configured to detect the number
of rotations of the each of the driven rollers is provided, the change of number of
rotations of the each of the driven rollers is grasped and suitably dealt with.
[0038] In the present invention, the each of the driven rollers may include a movement mechanism
configured to move the each of the driven rollers between a contact position where
the each of the driven rollers makes contact with a circumferential surface of the
corresponding one of the drive rollers and a separated position where the each of
the driven rollers is separated from the corresponding one of the drive rollers.
[0039] With this arrangement, when the at least one yarn is broken, the yarn breakage is
dealt with in such a way that one of the driven rollers which sends the at least one
broken yarn is separated from corresponding one of the drive rollers.
[0040] In the present invention, a separate roller may be provided in the vicinity of the
each of the driven rollers, and the at least one yarn may be wound onto the yarn feeding
unit and the separate roller.
[0041] With this arrangement, the at least one yarn is further reliably sent by the yarn
feeding unit.
[0042] In the present invention, the number of the drive rollers may be identical with the
number of the driven rollers.
[0043] As such, when the number of the drive rollers is identical with the number of the
driven rollers, the size of the each of the drive rollers in the axial direction is
small as compared to a case where, e.g., two driven rollers are provided to correspond
to the each of the drive rollers. It is therefore possible to reduce the total weight
of all of the drive rollers, and to rotate the drive rollers with small power. In
order to remain an appropriate contact state between the drive rollers and the driven
rollers, the drive rollers are preferably provided to correspond to the respective
driven rollers.
[0044] In the present invention, the axial direction of the each of the drive rollers may
be in parallel to a direction in which the drive rollers are aligned.
[0045] When known godet rollers with motors are aligned, the godet rollers are typically
provided so that an axial direction of each godet roller is orthogonal to a direction
in which the godet rollers are aligned. As a result, space saving is achieved in the
direction in which the godet rollers are aligned. In this case, however, a space equal
to the size of the diameter of each godet roller or the size of each motor is required.
Meanwhile, in the above-described arrangement of the present invention, it is not
required to provide the drive rollers with motors configured to drive the respective
drive rollers. Therefore, the drive rollers are provided as described above to achieve
space saving.
[0046] A false-twist texturing machine of the present invention includes the yarn sending
device arranged as described above, the false-twist texturing machine being configured
to false-twist yarns sent by the yarn sending device.
[0047] The false-twist texturing machine structured as described above makes it possible
to reduce the burden of maintenance of the yarn sending device and to achieve cost
reduction.
BRIEF DESCRIPTION OF THE DRAWINGS
[0048]
FIG. 1 is a schematic diagram of a false-twist texturing machine in an embodiment
of the present invention.
Each of FIG. 2(a) and FIG. 2(b) is a schematic diagram of a part of a yarn sending
device.
FIG. 3 is a schematic diagram of each separate roller.
FIG. 4 is a schematic diagram of each driven roller which has been replaced with a
cylindrical roller.
FIG. 5 is a schematic diagram of a part of a yarn sending device in a first modification.
FIG. 6 is a schematic diagram of a part of a yarn sending device in a second modification.
FIG. 7 is a schematic diagram of a part of a yarn sending device in a third modification.
FIG. 8 is a schematic diagram of a part of a yarn sending device in a fourth modification.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0049] The following will describe an embodiment of the present invention with reference
to figures.
(Overall Structure of False-Twist Texturing Machine)
[0050] FIG. 1 is a schematic diagram of a false-twist texturing machine 1 (corresponding
to a yarn processor of the present invention) in an embodiment of the present invention.
The false-twist texturing machine 1 includes: a yarn supplying part 2 configured to
supply yarns Y made of synthetic fibers; a processing part 3 (corresponding to a crimp
processing part of the present invention) configured to perform false-twisting (one
type of crimping of the present invention) for the yarns Y supplied from the yarn
supplying part 2; and a winding part 4 configured to wind the yarns Y false-twisted
by the processing part 3 so as to form packages P. In the processing part 3, processing
units 10 (these units may be referred to spindles) configured to false-twist the yarns
Y are aligned in a direction perpendicular to the sheet of FIG. 1. It is therefore
possible to simultaneously false-twist the running yarns Y aligned in the direction
perpendicular to the sheet of FIG. 1.
[0051] The yarn supplying part 2 is configured to supply the yarns Y from yarn supply packages
Q to the processing part 3. The processing part 3 is configured to false-twist the
yarns Y running along yarn paths. Each processing unit 10 forming the yarn processing
part 3 includes the following members provided along the yarn paths in this order
from the upstream side in a yarn running direction: a first feed roller 11; a twist-stopping
guide 12; a first heater 13; a cooler 14; a false-twisting device 15; a second feed
roller 16; an interlacing device 17; a third feed roller 18; a second heater 19; and
a fourth feed roller 20. In the winding part 4, the yarns Y false-twisted by the processing
part 3 are wound by winding devices 21 so as to form the packages P.
[0052] The false-twist texturing machine 1 includes a main base 5 and a winding base 6 which
are placed to be spaced apart from each other in a left-right direction of FIG. 1.
The main base 5 and the winding base 6 extend in the direction perpendicular to the
sheet of FIG. 1, and are placed to oppose each other. An upper part of the main base
5 is connected to an upper part of the winding base 6 by a supporting frame 7. Each
device forming the processing part 3 is mainly attached to the main base 5 or the
supporting frame 7. A working space 8 surrounded by the main base 5, the winding base
6, and the supporting frame 7 is a space where an operator performs various operations
such as yarn threading.
(Processing Part)
[0053] Each first feed roller 11 is provided at an upper portion of the winding base 6,
and configured to send a yarn Y supplied from the yarn supplying part 2 to a corresponding
first heater 13.
[0054] Each twist-stopping guide 12 is provided downstream of the first feed roller 11 and
upstream of the first heater 13 in the yarn running direction. The twist-stopping
guide 12 is configured to prevent twist of the yarn Y from being propagated to the
upstream side in the yarn running direction of the twist-stopping guide 12. The twist
of the yarn Y is formed by a corresponding false-twisting device 15 described later.
[0055] The first heater 13 is provided at the supporting frame 7, and configured to heat
the yarn Y sent from the first feed roller 11.
[0056] Each cooler 14 is provided downstream of the first heater 13 and upstream of the
false-twisting device 15 in the yarn running direction, and configured to cool the
yarn Y heated by the first heater 13.
[0057] The false-twisting device 15 is provided at an upper portion of the main base 5,
and configured to twist the yarn Y. Examples of the type of the false-twisting device
15 include a belt-type false-twisting device, a friction-disc type false-twisting
device, and a pin-type false-twisting device. In the present embodiment, the type
of the false-twisting device 15 is not limited to these.
[0058] Each second feed roller 16 is provided below the false-twisting device 15 in the
main base 5, and configured to send the yarn Y twisted by the false-twisting device
15 to a corresponding interlacing device 17. The conveyance speed of conveying the
yarn Y by the second feed roller 16 is higher than the conveyance speed of conveying
the yarn Y by the first feed roller 11. The yarn Y is therefore drawn between the
first feed roller 11 and the second feed roller 16.
[0059] The interlacing device 17 is provided below the second feed roller 16 in the main
base 5, and configured to interlace the yarn Y.
[0060] Each third feed roller 18 is provided below the interlacing device 17 in the main
base 5, and configured to send the yarn Y interlaced by the interlacing device 17
to a corresponding second heater 19. The conveyance speed of conveying the yarn Y
by the third feed roller 18 is lower than the conveyance speed of conveying the yarn
Y by the second feed roller 16. The yarn Y is therefore relaxed between the second
feed roller 16 and the third feed roller 18.
[0061] The second heater 19 is provided below the third feed roller 18 in the main base
5, and configured to heat the yarn Y sent from the third feed roller 18.
[0062] Each fourth feed roller 20 is provided at a lower portion of the winding base 6,
and configured to send the yarn Y thermally treated by the second heater 19 to a corresponding
winding device 21. The conveyance speed of conveying the yarn Y by the fourth feed
roller 20 is lower than the conveyance speed of conveying the yarn Y by the third
feed roller 18. The yarn Y is therefore relaxed between the third feed roller 18 and
the fourth feed roller 20.
[0063] In the processing part 3 arranged as described above, the yarn Y drawn between the
first feed roller 11 and the second feed roller 16 is twisted by the false-twisting
device 15. The twist formed by the false-twisting device 15 propagates to the twist-stopping
guide 12, but does not propagate to the upstream of the twist-stopping guide 12 in
the yarn running direction. The yarn Y twisted while being drawn is heated by the
first heater 13, and then cooled and thermally set by the cooler 14. The twisted yarn
Y passes the false-twisting device 15. After that, the yarn Y is unwound before reaching
the second feed roller 16. However, because the twist of the yarn Y is thermally set
as described above, each filament is maintained to be wavy in shape.
[0064] Subsequently, the yarn Y is interlaced by the interlacing device 17 while being relaxed
between the second feed roller 16 and the third feed roller 18. The interlaced yarn
Y is then thermally set by the second heater 19 while being relaxed between the third
feed roller 18 and the fourth feed roller 20. Finally, the yarn Y sent from the fourth
feed roller 20 is wound by the winding device 21 to form each package P.
(Yarn sending device)
[0065] Each of FIG. 2(a) and FIG. 2(b) is a schematic diagram of a part of a yarn sending
device 30. The yarn sending device 30 is applied to at least one or all of each first
feed roller 11, each second feed roller 16, each third feed roller 18, and each fourth
feed roller 20. The yarn sending device 30 includes a drive shaft 31, a motor 32,
drive rollers 33, and driven rollers 34.
[0066] The drive shaft 31 extends in the direction perpendicular to the sheet of FIG. 1,
i.e., in a direction in which the yarns Y are aligned at the processing part 3. The
drive shaft 31 is rotationally driven about its axis by the motor 32. To the drive
shaft 31, the drive rollers 33 are fixed at regular intervals in an axial direction
of the drive shaft 31 (hereinafter, this direction will be simply referred to as the
axial direction). As the drive shaft 31 is rotationally driven by the motor 32, the
drive rollers 33 are simultaneously rotated. The drive rollers 33 are cylindrical
rollers each of which has a constant outer diameter and which are made of metal. However,
the drive rollers 33 may be made of a material which is not metal.
[0067] The number of the driven rollers 34 is the same as that of the drive rollers 33.
The driven rollers 34 are provided at regular intervals in the axial direction, so
as to oppose the respective drive rollers 33. However, the number of the driven rollers
34 may not be the same as that of the drive rollers 33. For example, the driven rollers
34 may be provided for a single drive roller 33 which is large in the axial direction.
In each driven roller 34, a lever mechanism 37 (corresponding to a movement mechanism
of the present invention) is provided. Each driven roller 34 is attached to an unillustrated
base through a supporter 37a of the lever mechanism 37. In each driven roller 34,
a detector 38 configured to detect the number of rotations of the driven roller 34
is provided. However, the detector 38 may be omitted. Alternatively, the detector
38 may be provided in only one or some of the driven rollers 34.
[0068] The lever mechanism 37 is able to move a corresponding driven roller 34 between a
contact position (see FIG. 2(a)) where the driven roller 34 (specifically, a large
diameter portion 35) is in contact with a circumferential surface of a drive roller
33 and a separated position (see FIG. 2(b)) where the driven roller 34 (specifically,
the large diameter portion 35) is separated from the circumferential surface of the
drive roller 33. In the lever mechanism 37, an unillustrated biasing member (such
as a spring) configured to bias the driven roller 34 toward the drive roller 33 is
embedded. The biasing member is adjusted so that the driven roller 34 is in contact
with the drive roller 33 with suitable contact pressure.
[0069] Each driven roller 34 includes a fixing shaft 34a supporting the driven roller 34
to be rotatable. The fixing shaft 34a is in parallel to the drive shaft 31. Between
the driven roller 34 and the fixing shaft 34a, an unillustrated bearing is provided.
The fixing shaft 34a is fixed to the supporter 37a of the lever mechanism 37 by a
fixing mechanism. The fixing shaft 34a is detached from the supporter 37a (lever mechanism
37) by releasing the fixing mechanism. That is, the fixing shaft 34a is detachably
attached to the supporter 37a. When attached to the supporter 37a, the fixing shaft
34a is not rotated. The fixing shaft 34a can be detached from the supporter 37a, along
with the driven roller 34. The above-described fixing mechanism is, e.g., a bolt 80.
That is, when the bolt 80 is loosened, the fixing shaft 34a is detachable from the
supporter 37a. In this state, the driven rollers 34 shown in FIG. 2 are replaceable
with cylindrical rollers 39 each of which has a constant outer diameter as shown in
FIG. 4. Each driven roller 34 may be fixed to a shaft which is rotatably supported
by the supporter 37a.
[0070] The fixing shaft 34a is detached from the supporter 37a by being pulled off from
the supporter 37a in the axial direction. With this arrangement, when (i) each unit
including the driven roller 34, the fixing shaft 34a, and the lever mechanism 37 is
provided and (ii) the fixing shaft 34a is detached from the supporter 37a, a space
for pulling off the fixing shaft 34a from the supporter 37a is required in addition
to the space occupied by the unit.
[0071] In this regard, a mechanism for moving the driven roller 34 is not limited to the
lever mechanism 37. A different mechanism may be used as the mechanism for moving
the driven roller 34. In the present embodiment, the yarn threading is possible in
the state shown in FIG. 2(a). Therefore, an operation of the lever mechanism 37 is
not required in the yarn threading. The lever mechanism 37 is used for separating
the driven roller 34 from the drive roller 33 in case of an accident such as production
stop, malfunction, and yarn breakage.
[0072] On a circumferential surface of the driven roller 34, a level difference is formed
so that the large diameter portion 35 (corresponding to a rotational force receiver
of the present invention) and a small diameter portion 36 (corresponding to a yarn
feeding unit of the present invention) are provided. The small diameter portion 36
is smaller in outer diameter than the large diameter portion 35. In other words, both
the large diameter portion 35 and the small diameter portion 36 are formed in each
driven roller 34. When the driven roller 34 is at the contact position, the large
diameter portion 35 is in contact with the circumferential surface of the drive roller
33 to receive rotational force from the drive roller 33. The small diameter portion
36 is provided to oppose the circumferential surface of the drive roller 33. A direction
in which the small diameter portion 36 opposes the drive roller 33 is orthogonal to
the axial direction. In the present embodiment, the entire small diameter portion
36 is provided to oppose the circumferential surface of the drive roller 33 in the
axial direction. The small diameter portion 36 is provided so that at least a part
of the small diameter portion 36 opposes the circumferential surface of the drive
roller 33 in the axial direction. When the large diameter portion 35 is provided to
oppose the circumferential surface of the drive roller 33, the small diameter portion
36 may not be provided to oppose the circumferential surface of the drive roller 33.
Even when the driven roller 34 is at the contact position, there is a space between
the small diameter portion 36 and the circumferential surface of the drive roller
33. That is, a circumferential surface of the small diameter portion 36 is separated
from the circumferential surface of the drive roller 33.
[0073] In this regard, the large diameter portion 35 and the small diameter portion 36 may
be formed in different driven rollers 34. In this case, each driven roller 34 is fixed
to a shaft rotatably supported by the supporter 37a. Furthermore, the rotational force
received by the large diameter portion 35 is transmitted to the small diameter portion
36 via the shaft.
[0074] FIG. 3 is a schematic diagram of a separate roller 71 viewed from the right side
of the sheet of FIG. 2 (one side in the axial direction). The separate roller 71 is
provided in the vicinity of each driven roller 34. Between the small diameter portion
36 of the driven roller 34 and the separate roller 71, a yarn Y is wound onto the
small diameter portion 36 of the driven roller 34 and the separate roller 71 plural
times. A rotational axis of the separate roller 71 is slightly inclined with respect
to a rotational axis of the driven roller 34 so that the yarn Y, which is wound onto
the small diameter portion 36 of the driven roller 34 and the separate roller 71 plural
times, does not overlap with itself. When grooves or protruding portions are provided
on the circumferential surface of the separate roller 71 and/or the circumferential
surface of the small diameter portion 36 to prevent the yarn Y from overlapping with
itself, the rotational axis of the separate roller 71 may be in parallel to the rotational
axis of the driven roller 34. The grooves or protruding portions provided on the circumferential
surface of the separate roller 71 and/or the circumferential surface of the small
diameter portion 36 may be in parallel to one another. While the separate roller 71
is arranged to be rotationally driven in the present embodiment, the separate roller
71 may be fixed. Alternatively, the separate roller 71 may not be provided. For example,
a guide may be provided instead of the separate roller 71. Assume that the separate
roller 71 and the guide are not provided. In this case, when a spiral groove is formed
on the circumferential surface of the small diameter portion 36, the yarn Y is wound
onto the small diameter portion 36 of the driven roller 34 plural times along the
spiral groove so that the yarn Y does not overlap with itself. With this arrangement,
slipping of the yarn Y is prevented.
[0075] The small diameter portion 36 in the axial direction is larger than the large diameter
portion 35 in the axial direction. The large diameter portion 35 is attached to an
end face of the small diameter portion 36 by a bolt, etc. Furthermore, the large diameter
portion 35 is attachable to and detachable from the small diameter portion 36. The
large diameter portion 35 is a disc-shaped member made of rubber. The small diameter
portion 36 is a cylindrical member made of metal. The circumferential surface of the
small diameter portion 36 may be mirror-finished or matte-finished. A friction coefficient
of the circumferential surface of the large diameter portion 35 is larger than a friction
coefficient of the circumferential surface of the small diameter portion 36. With
this arrangement, the large diameter portion 35 is suitable for receiving the rotational
force by making contact with the circumferential surface of the drive roller 33. However,
the circumferential surface of the large diameter portion 35 may be made of a material
which is not rubber, and the circumferential surface of the small diameter portion
36 may be made of a material which is not metal and which is unlikely to be worn.
The friction coefficient of the circumferential surface of the large diameter portion
35 may not be larger than the friction coefficient of the circumferential surface
of the small diameter portion 36. The large diameter portion 35 may not be detachably
attached to the small diameter portion 36.
[0076] In the yarn sending device 30 arranged as described above, as the drive shaft 31
is rotationally driven by the motor 32, the drive rollers 33 simultaneously rotate
so that the rotational force is transmitted from the drive roller 33 to the large
diameter portions 35 of the respective driven rollers 34. As a result, the driven
rollers 34 are rotated so that the yarns Y wound onto the small diameter portions
36 of the respective driven rollers 34 are sent.
(Effects)
[0077] In the yarn sending device 30 of the present embodiment, the drive rollers 33 are
fixed to the drive shaft 31. It is therefore possible to rotate the drive rollers
33 by using the single motor 32 (driving source) configured to rotationally drive
the drive shaft 31. Cost reduction is therefore achieved. Each driven roller 34 includes
the rotational force receiver (large diameter portion 35) configured to make contact
with the circumferential surface of a corresponding drive roller 33 and the yarn feeding
unit (small diameter portion 36) configured not to make contact with the circumferential
surface of the drive roller 33. As the driven roller 34 are rotated by receiving the
rotational force of the drive roller 33 via the rotational force receiver 35, a yarn
Y wound onto the yarn feeding unit 36 is sent. Although it is required to remain an
appropriate contact state between each drive roller 33 and the rotational force receiver
35 of each driven roller 34, fine adjustment such as that in a nip-roller type yarn
sending device is not required. This is because the yarn Y is not sent while being
sandwiched between the drive roller 33 and the driven roller 34. As a result, the
burden of maintenance is reduced. It is therefore possible to achieve cost reduction
and to reduce the burden of maintenance by using the yarn sending device 30.
[0078] In the present embodiment, the large diameter portion 35 and the small diameter portion
36 which is smaller in outer diameter than the large diameter portion 35 are formed
in one roller (each driven roller 34 in the present embodiment) among each pair of
the drive roller 33 and the driven roller 34. The large diameter portion 35 is configured
to make contact with the circumferential surface of the other roller (each drive roller
33 in the present embodiment) among the pair of the drive roller 33 and the driven
roller 34. With this arrangement, there is a space between the circumferential surface
of the small diameter portion 36 of the one roller 34 and a part of the circumferential
surface of the other roller 33. The part of the circumferential surface of the other
roller 33 opposes the small diameter portion 36. Therefore, when the yarn Y is wound
onto the circumferential surface of the small diameter portion 36 of the one roller
34 or onto the part of the circumferential surface of the other roller 33 which opposes
the small diameter portion 36, the yarn Y is sent on account of a holding force, i.e.,
a friction force of the wounded yarn Y without being sandwiched between two rollers
33 and 34.
[0079] In the present embodiment, the small diameter portion 36 in the axial direction is
larger than the large diameter portion 35 in the axial direction. With this arrangement,
the small diameter portion 36 is able to have a large part onto which the yarn Y is
wounded. As a result, the yarn threading is facilitated.
[0080] In the present embodiment, the above-described one roller (each driven roller 34)
is structured so that the large diameter portion 35 is attachable to and detachable
from the small diameter portion 36. When the large diameter portion 35 is worn as
a result of contact with the above-described other roller (each drive roller 33),
the number of rotations of the driven roller 34 changes so that the conveyance speed
of conveying the yarn Y changes. In the embodiment above, when the large diameter
portion 35 is worn, the change of conveyance speed of conveying the yarn Y is avoided
by performing replacement of the large diameter portion 35. When the large diameter
portion 35 is made of resin such as rubber as described in the present embodiment,
the conveyance speed of conveying the yarn Y may be adjusted by polishing the surface
of the large diameter portion 35.
[0081] In the present embodiment, the small diameter portion 36 formed in the above-described
one roller (each driven roller 34) is provided to oppose the circumferential surface
of the above-described other roller (each drive roller 33). For example, when the
yarn Y is thick, the yarn Y is stably sent by the nip-roller type yarn sending device.
As such, the type of an appropriate yarn sending device changes depending on the type
of the yarn Y. With this arrangement, when each large diameter portion 35 is detached
from a corresponding small diameter portion 36, the yarn sending device 30 is usable
as the nip-roller type yarn sending device configured to send each yarn Y while sandwiching
the yarn Y between the small diameter portion 36 and the above-described other roller
33. This arrangement makes it possible to provide a yarn sending device which is appropriate
for various types of yarns Y. When the large diameter portion 35 is detached from
the small diameter portion 36 in one or some of the driven rollers 34, the various
types of yarns Y are simultaneously sent by a single yarn sending device.
[0082] In the present embodiment, the large diameter portion 35 and the small diameter portion
36 are formed in each driven roller 34. The large diameter portion 35 functions as
the rotational force receiver, and the small diameter portion 36 functions as the
yarn feeding unit. Furthermore, a level difference is formed between the large diameter
portion 35 and the small diameter portion 36. This arrangement makes it possible to
prevent the yarn Y wounded onto the small diameter portion 36 from moving to the large
diameter portion 35. It is therefore possible to prevent each yarn Y from being unintentionally
sandwiched between the large diameter portion 35 and the drive roller 33.
[0083] In the present embodiment, each driven roller 34 includes (i) the fixing shaft 34a
which supports the driven roller 34 to be rotatable and (ii) the supporter 37a which
supports the fixing shaft 34a. The fixing shaft 34a is fixed to the supporter 37a
so as to be attachable to and detachable from the supporter 37a. With this arrangement,
replacement of the driven roller 34 is easily performed in such a way that the fixing
shaft 34a is detached from the supporter 37a along with the driven roller 34.
[0084] In the present embodiment, the large diameter portion 35 and the small diameter portion
36 are formed in each driven roller 34. With this arrangement, a space required for
providing each unit including the driven roller 34, the fixing shaft 34a, and the
supporter 37a is small as compared to a case where the large diameter portion 35 and
the small diameter portion 36 are formed in different driven rollers 34. As the fixing
shaft 34a is detached from the supporter 37a along with the driven roller 34, the
large diameter portion 35 and the small diameter portion 36 are simultaneously detached.
[0085] In the present embodiment, the large diameter portion 35 is attached to the end
face of the small diameter portion 36. As described in a modification later, the large
diameter portion 35 may be a ring-shaped member. However, in this case, the ring-shaped
member may be broken because the strength of the ring-shaped member is insufficient.
Meanwhile, when the large diameter portion 35 is attached to the end face of the small
diameter portion 36, the large diameter portion 35 is shaped as a disc to improve
the strength of the large diameter portion 35.
[0086] In the present embodiment, the driven rollers 34 are replaceable with the respective
cylindrical rollers 39 (see FIG. 4) each of which has a constant outer diameter. For
example, when each yarn Y is thick, the yarn Y is stably sent by the nip-roller type
yarn sending device. As such, the type of an appropriate yarn sending device changes
depending on the type of the yarn Y. When each driven roller 34 which is configured
to send the yarn Y by means of the small diameter portion 36 without sandwiching the
yarn Y is replaceable with a roller which is configured to send the yarn Y while sandwiching
the yarn Y with the drive roller 33, the yarn sending device 30 which is appropriate
for various types of yarns Y is provided. When one or some of the driven rollers 34
is/are replaced with one or some of the cylindrical rollers 39 each of which has a
constant outer diameter, the various types of yarns Y are simultaneously sent by the
single yarn sending device 30.
[0087] In the present embodiment, the circumferential surface of the yarn feeding unit 36
is made of metal. When the circumferential surface of the yarn feeding unit 36 is
worn as a result of friction with each yarn Y, the yarn Y may get damaged or may not
be reliably sent. When the circumferential surface of the yarn feeding unit 36 is
made of metal, wearing of the circumferential surface of the yarn feeding unit 36
is preferably suppressed.
[0088] In the present embodiment, the circumferential surface of the rotational force receiver
35 is made of a material whose friction coefficient is larger than that of a material
of the circumferential surface of the yarn feeding unit 36. With this arrangement,
when the rotational force receiver 35 is in contact with the circumferential surface
of the drive roller 33, the rotational force receiver 35 further reliably receives
the rotational force from the drive roller 33.
[0089] In the present embodiment, the detector 38 configured to detect the number of rotations
of the driven roller 34 is provided. When the rotational force is transmitted as a
result of the contact between the drive roller 33 and the driven roller 34, the number
of rotations of the driven roller 34 may change because of wearing of the driven roller
34. In this regard, when the detector 38 configured to detect the number of rotations
of the driven roller 34 is provided, the change of number of rotations of the driven
roller 34 is grasped and suitably dealt with.
[0090] In the present embodiment, each driven roller 34 includes the lever mechanism 37
(movement mechanism) which is able to move the driven roller 34 between the contact
position where the driven roller 34 is in contact with the circumferential surface
of the drive roller 33 and the separated position where the driven roller 34 is separated
from the drive roller 33. With this arrangement, when one yarn Y is broken, the yarn
breakage is dealt with in such a way that one driven roller 34 sending this broken
yarn Y is separated from a corresponding drive roller 33.
[0091] In the present embodiment, the separate roller 71 is provided in the vicinity of
each driven roller 34, and the yarn Y is wound onto the yarn feeding unit 36 and the
separate roller 71. With this arrangement, the yarn Y is further reliably sent by
the yarn feeding unit 36.
[0092] In the present embodiment, the number of the drive rollers 33 is the same as that
of the driven rollers 34. As such, when the number of the drive rollers 33 is the
same as that of the driven rollers 34, the size of each drive roller 33 in the axial
direction is small as compared to a case where, e.g., two driven rollers 34 are provided
to correspond to each drive roller 33. It is therefore possible to reduce the total
weight of all drive rollers 33, and to rotate the drive rollers 33 with small power.
In order to remain the appropriate contact state between the drive rollers 33 and
the driven rollers 34, the drive rollers 33 are preferably provided to correspond
to the respective driven rollers 34.
[0093] In the present embodiment, the axial direction of each of the drive rollers 33 is
in parallel to the direction in which the drive rollers 33 are aligned. When known
godet rollers with motors are aligned, the godet rollers are typically provided so
that an axial direction of each godet roller is orthogonal to a direction in which
the godet rollers are aligned. As a result, space saving is achieved in the direction
in which the godet rollers are aligned. With this arrangement, however, a space equal
to the size of the diameter of each godet roller or the size of each motor is required.
Meanwhile, in the present embodiment, it is not required to provide the drive rollers
33 with motors configured to drive the respective drive rollers 33. Therefore, the
drive rollers 33 are provided as described above to achieve the space saving.
(Other Embodiments)
[0094] The following describes modifications of the present invention. It should be noted
that the arrangements and effects identical with those in the above-described embodiments
are not repeated here.
[0095] FIG. 5 is a schematic diagram of a part of a yarn sending device 46 in a first modification.
In the embodiment above, the large diameter portion 35 of each driven roller 34 is
formed of a single member. However, as described in the present modification, a large
diameter portion 47 of the driven roller 34 may be formed of a central portion 48
and an outer circumferential portion 49 which is attachable to and detachable from
a circumferential surface of the central portion 48. With this arrangement, for example,
when the large diameter portion 47 is worn, replacement is performed not for the entire
large diameter portion 47 but only for the outer circumferential portion 49. Therefore,
running costs are reduced.
[0096] FIG. 6 is a schematic diagram of a part of a yarn sending device 40 in a second modification.
In the embodiment above, the large diameter portion 35 of each driven roller 34 is
attached to the end face of the small diameter portion 36. However, as described in
the present modification, each driven roller 41 may be structured so that a ring-shaped
member 43 is attached to a circumferential surface of a cylindrical roller main body
42. The ring-shaped member 43 is preferably made of an elastic material such as rubber.
In the roller main body 42 of this case, a part to which the ring-shaped member 43
is attached functions as a large diameter portion 44 (rotational force receiver),
and a part to which the ring-shaped member 43 is not attached functions as a small
diameter portion 45 (yarn feeding unit). With this arrangement, for example, when
the large diameter portion 44 is worn, the worn ring-shaped member 43 is detached
from the roller main body 42 and a new ring-shaped member 43 is attached to the roller
main body 42. This facilitates replacement of the large diameter portion 44.
[0097] FIG. 7 is a schematic diagram of a part of a yarn sending device 50 in a third modification.
In the embodiment above, the large diameter portion 35 and the small diameter portion
36 are formed in each driven roller 34. However, as described in the present modification,
a large diameter portion 52 and a small diameter portion 53 may be formed in each
of drive rollers 51 and driven rollers 54 may be provided as cylindrical rollers each
of which has a constant outer diameter. In each driven roller 54 of this case, a part
which is in contact with a circumferential surface of the large diameter portion 52
of a corresponding drive roller 51 functions as a rotational force receiver 55, and
a part which is separated from the circumferential surface of the large diameter portion
52 functions as a yarn feeding unit 56. In order to suppress wearing of the driven
roller 54 as a result of friction with the yarn Y, the circumferential surface of
the driven roller 54 is preferably made of metal. However, the circumferential surface
of the driven roller 54 may be made of a material which is not metal as long as the
material is unlikely to be worn. In order to ensure the transmission of the rotational
force from the drive roller 51 to the driven roller 54, the circumferential surface
of at least the large diameter portion 52 of the drive roller 51 is preferably made
of a material such as rubber whose friction coefficient is large. However, the materials
of the drive roller 51 and driven roller 54 may be suitably changed.
[0098] FIG. 8 is a schematic diagram of a part of a yarn sending device 60 in a fourth
modification. In the embodiment above, the large diameter portion 35 and the small
diameter portion 36 are formed in each driven roller 34. However, as described in
the present modification, (i) each driven roller 62 in the axial direction may be
larger than each drive roller 61 in the axial direction and (ii) neither the drive
roller 61 nor the driven roller 62 may not be provided with a large diameter portion
and a small diameter portion. In the driven roller 62 of this case, a part which is
in contact with a circumferential surface of the drive roller 61 functions as a rotational
force receiver 63, and a part which is separated from the circumferential surface
of the drive roller 61 functions as a yarn feeding unit 64. With this arrangement,
the driven roller 62 and the drive roller 61 are cylindrical in shape. Therefore,
the structures of the driven roller 62 and drive roller 61 are simplified as compared
to a case where a large diameter portion and a small diameter portion are formed in
the driven roller 62 or the drive roller 61.
[0099] In the embodiment above, the large diameter portion 35 and the small diameter portion
36 are formed only in each driven roller 34. However, a large diameter portion and
a small diameter portion may be formed not only in each driven roller 34 but also
in each drive roller 33.
[0100] The rotational force may be further reliably transmitted in the embodiment above
by forming a gear or an anti-slip mechanism (such as a groove) on the circumferential
surface of the drive roller 33 and the circumferential surface of the large diameter
portion 35 of the driven roller 34.
[0101] In the embodiment above, the yarn sending device 30 is applied to the false-twist
texturing machine 1. However, the yarn sending device 30 may be applied to a yarn
processor of another type which is configured to crimp a yarn made of synthetic fibers.
1. A yarn sending device (30, 40, 46, 50, 60) provided in a yarn processor (1) including
a crimp processing part (3) configured to crimp at least one yarn (Y) made of synthetic
fibers, the yarn sending device (30, 40, 46, 50, 60) comprising:
drive rollers (33, 51, 61) fixed to a drive shaft (31) which is rotationally driven;
and
driven rollers (34, 41, 54, 62) which are rotated by making contact with circumferential
surfaces of the drive rollers (33, 51, 61) and receiving a rotational force from the
drive rollers (33, 51, 61),
a rotational force receiver (35, 44, 47, 55, 63) configured to make contact with a
circumferential surface of corresponding one of the drive rollers (33, 51, 61) and
a yarn feeding unit (36, 45, 56, 64) which is configured not to make contact with
the circumferential surface of the corresponding one of the drive rollers (33, 51,
61) and onto which the at least one yarn (Y) is wound being formed in a part of each
of the driven rollers (34, 41, 54, 62) in an axial direction of the each of the driven
rollers (34, 41, 54, 62) .
2. The yarn sending device (30, 40, 46, 50) according to claim 1, wherein, the each of
the driven rollers (34, 41, 54, 62) and the corresponding one of the drive rollers
(33, 51, 61) form a pair, a large diameter portion (35, 44, 47, 52) and a small diameter
portion (36, 45, 53) which is smaller in outer diameter than the large diameter portion
(35, 44, 47, 52) are formed in one roller (34, 41, 51) among the pair of the each
of the driven rollers (34, 41, 54, 62) and the corresponding one of the drive rollers
(33, 51, 61), and
the large diameter portion (35, 44, 47, 52) is configured to make contact with a circumferential
surface of the other roller (33, 54) among the pair of the each of the driven rollers
(34, 41, 54, 62) and the corresponding one of the drive rollers (33, 51, 61).
3. The yarn sending device (30, 40, 46, 50) according to claim 2, wherein, the small
diameter portion (36, 45, 53) in the axial direction is larger than the large diameter
portion (35, 44, 47, 52) in the axial direction.
4. The yarn sending device (30, 40, 46, 50) according to claim 2 or 3, wherein, the one
roller (34, 41, 51) is structured so that the large diameter portion (35, 44, 47,
52) is attachable to and detachable from the small diameter portion (36, 45, 53).
5. The yarn sending device (30, 40, 46, 50) according to claim 4, wherein, at least a
part of the small diameter portion (36, 45, 53) formed in the one roller (34, 41,
51) is provided to oppose a circumferential surface of the other roller (33, 54).
6. The yarn sending device (30, 40, 46) according to any one of claims 2 to 5, wherein,
the large diameter portion (35, 44, 47) and the small diameter portion (36, 45) are
formed in the each of the driven rollers (34, 41), the large diameter portion (35,
44, 47) functions as the rotational force receiver, and the small diameter portion
(36, 45) functions as the yarn feeding unit.
7. The yarn sending device (30, 40, 46) according to claim 6, wherein, a fixing shaft
(34a) which rotatably supports the each of the driven rollers (34, 41) and a supporter
(37a) which supports the fixing shaft (34a) are provided in the each of the driven
rollers (34, 41), and
the fixing shaft (34a) is fixed to the supporter (37a) so as to be attachable to and
detachable from the supporter (37a).
8. The yarn sending device (30, 40, 46) according to claim 7, wherein, both the large
diameter portion (35, 44, 47) and the small diameter portion (36, 45) are formed in
the each of the driven rollers (34, 41).
9. The yarn sending device (40) according to claim 8, wherein, the each of the driven
rollers (41) is structured so that a ring-shaped member (43) is attached to a circumferential
surface of a cylindrical roller main body (42) and, in the roller main body (42),
a part to which the ring-shaped member (43) is attached functions as the large diameter
portion (44) and a part to which the ring-shaped member (43) is not attached functions
as the small diameter portion (45).
10. The yarn sending device (46) according to claim 8, wherein, the large diameter portion
(47) is formed of a central portion (48) and an outer circumferential portion (49)
which is detachably attached to a circumferential surface of the central portion (48).
11. The yarn sending device (30, 46) according to claim 8, wherein, the large diameter
portion (35, 47) is attached to an end face of the small diameter portion (36) in
the each of the driven rollers (34).
12. The yarn sending device (30, 40, 46) according to any one of claims 8 to 10, wherein,
the driven rollers (34, 41) are respectively replaceable with cylindrical rollers
(39) each of which has a constant outer diameter.
13. The yarn sending device (60) according to claim 1, wherein, the each of the driven
rollers (62) in the axial direction is larger than each of the drive rollers (61)
in an axial direction of the each of the drive rollers (61) and, in the each of the
driven rollers (62), a part which is in contact with a circumferential surface of
the corresponding one of the drive rollers (61) functions as the rotational force
receiver (63) and a part which is not in contact with the circumferential surface
of the corresponding one of the drive rollers (61) functions as the yarn feeding unit
(64).
14. The yarn sending device (30, 40, 46, 50, 60) according to any one of claims 1 to 13,
wherein, a circumferential surface of the yarn feeding unit (36, 45, 56, 64) is made
of metal.
15. The yarn sending device (30, 40, 46, 50, 60) according to any one of claims 1 to 14,
wherein, a circumferential surface of the rotational force receiver (35, 44, 47, 55,
63) is made of a material whose friction coefficient is larger than a friction coefficient
of a material of the circumferential surface of the yarn feeding unit (36, 45, 56,
64) .
16. The yarn sending device (30, 40, 46, 50, 60) according to any one of claims 1 to 15,
further comprising a detector (38) configured to detect the number of rotations of
the each of the driven rollers (34, 41, 54, 62).
17. The yarn sending device (30, 40, 46, 50, 60) according to any one of claims 1 to 16,
wherein, the each of the driven rollers (34, 41, 54, 62) includes a movement mechanism
(37) configured to move the each of the driven rollers (34, 41, 54, 62) between a
contact position where the each of the driven rollers (34, 41, 54, 62) makes contact
with a circumferential surface of the corresponding one of the drive rollers (33,
51, 61) and a separated position where the each of the driven rollers (34, 41, 54,
62) is separated from the corresponding one of the drive rollers (33, 51, 61) .
18. The yarn sending device (30, 40, 46, 50, 60) according to any one of claims 1 to 17,
wherein, a separate roller (71) is provided in the vicinity of the each of the driven
rollers (34, 41, 54, 62), and
the at least one yarn (Y) is wound onto the yarn feeding unit (36, 45, 56, 64) and
the separate roller (71).
19. The yarn sending device (30, 40, 46, 50, 60) according to any one of claims 1 to 18,
wherein, the number of the drive rollers (33, 51, 61) is identical with the number
of the driven rollers (34, 41, 54, 62).
20. The yarn sending device (30, 40, 46, 50, 60) according to any one of claims 1 to 19,
wherein, the axial direction of the each of the drive rollers (33, 51, 61) is in parallel
to a direction in which the drive rollers (33, 51, 61) are aligned.
21. A false-twist texturing machine (1) comprising the yarn sending device (30, 40, 46,
50, 60) according to any one of claims 1 to 20, the false-twist texturing machine
(1) being configured to false-twist yarns (Y) sent by the yarn sending device (30,
40, 46, 50, 60).