False twist texturing machine

Abstract

False twist texturing machine (1) characterized in that the false twist texturing machine comprises a yarn feeding section (5); a plurality of feed rollers (20, 21, 22) configured to allow a yarn (Y) fed from the yarn feed section (5) to move; a winding device (15) adapted to wind the moving yarn (Y); and a first heating device (11), a cooling device (12), a false twisting device (13) and a second heating device (14) arranged in this order from an upstream side of a yarn moving direction along a yarn path from the yarn feeding section (5) toward the winding device (15), and in that the false twisting device (13) and the second heating device (14) are provided on a main frame (2) and the winding device (15) is provided on a winding frame (3) which is provided via a working space (6) opposite the main frame (2), a first feed roller (20) is arranged in the winding frame (3) to feed the yarn (Y) fed from the yarn feed section (5) to the first heating device (11), and the first heating device (11) and the cooling device (12) are provided in an upper portion of the working space (6) and the winding device (15), the main frame (2) and the yarn feed section (5) do not overlap in the vertical direction, and that winding devices (15) are arranged in four stages in the winding frame (3).

Description

Field of the invention

[0001] The present invention relates to a false twist texturing machine designed to impart a false twist to a yarn. Background of the invention

[0002] A false twist texturing machine configured to impart false twist to the yarn generally comprises a first heating device, a cooling device, a false twisting device, and a second heating device, which are arranged in this order from the upstream side of the yarn movement direction along a yarn path from a yarn feed section to a winding device. The disclosed structure of the device in the false twist texturing machine is, for example, as follows.

[0003] The unexamined Japanese patent application with publication number JP H08-325 866 A ( Fig. 6) describes a false twist texturing machine comprising a false twist device and a second heating device, both provided in a main frame, a winding device arranged in a winding stand above a working space opposite the main frame, and a first heating device and a cooling device, both arranged in the upper section of the working space and a winding stand, wherein the winding devices are arranged in three stages.

[0004] Furthermore, the unexamined Japanese patent application with publication number JP S52-31149 A ( Fig. 2) a false twist texturing machine comprising a winding device and a second heating device arranged side by side on a main frame, a yarn feeding section arranged across a working space opposite the main frame, wherein a yarn fed from the yarn feeding device, which is moved in the upper section of the working space, passes through a first heating device, a cooling device and a false twist device and is fed to the second heating device.

[0005] However, the false twist texturing machine described in JP H08-325866 A includes winding devices arranged in only three stages. Consequently, this machine requires the ability to wind a large number of bobbins, bundles, or spools in a short time. One possible solution is to increase the number of winding devices of the false twist texturing machine. However, a simple increase in the number of winding devices arranged vertically results in an increase in the height of the winding frame. This causes the yarn to bend significantly between a feed roller and the first heating device unless the first heating device and the cooling device are arranged higher. This significant bending increases the stress on the yarn, thereby reducing the yarn quality.Furthermore, if the first heating device and the cooling device are arranged higher to prevent a possible change in the bending angle of the yarn between the feed roller and the first heating device, the height of the false twist texturing machine as a whole is increased. Consequently, a larger space is required to house the false twist texturing machine. As a result, the cost of interior temperature control is increased.

[0006] Furthermore, the false twist texturing machine described in unexamined Japanese patent application publication number JP S52-31149 A proposes winding devices arranged in four stages. Full bobbins wound by the winding devices are discharged into the working space located opposite the second heating device. However, allocating a portion of the working space for storing full bobbins or bundles is difficult, as this may result in impaired operability during yarn production.

[0007] Similar machines are described in DE 26 26 731 A1, EP 0 807 701 A1 and DE 198 01 150 A1.

[0008] Accordingly, it is an object of the present invention to provide a false twist texturing machine configured to secure a space in which full bobbins are stored, thereby making it possible to wind many high-quality bobbins in a short time. Summary of the invention

[0009] A false twist texturing machine according to the present invention comprises a yarn feed section, a plurality of feed rollers configured to allow a yarn fed from the yarn feed device to move, a winding device configured to wind a moving yarn, and a first heating device, a cooling device, a false twist device, and a second heating device arranged in this order from an upstream side of a yarn moving direction along a yarn path from the yarn feed section toward the winding device. The false twist device and the second heating device are provided on the main frame. The winding device is provided in a winding stand arranged across a working space opposite the main arms.Furthermore, a first feed roller is arranged in the winding frame to feed the yarn fed from the yarn feed section to the first heating device. The first heating device and the cooling device are provided in an upper portion of the working space. The winding devices are arranged in four stages in the winding frame.

[0010] In the false twist texturing machine according to the present invention, the winding devices are arranged in four stages. Consequently, the false twist texturing machine according to the present invention allows more bobbins to be wound than false twist texturing machines in which the winding devices are arranged in three stages at most. Consequently, the present invention enables more bobbins to be wound in a short time. Furthermore, the present invention enables full bobbins to be unloaded into a free space located opposite the work space. This makes it possible to allocate a space for storing full bobbins while securing the work space. Consequently, many full bobbins can be stored in the free space. As a result, the frequency with which full bobbins need to be picked up is reduced, which contributes to increasing work efficiency.Despite an increase in the height of the false twist texturing machine as a whole and in the height of the winding frame, the first heating device and the cooling device arranged in the upper portion of the working space avoid overlapping the winding frame in the vertical direction. Consequently, the height of the false twist texturing machine as a whole is prevented from increasing. The required size of the space in which the false twist texturing machine is housed remains unchanged, and the cost for indoor temperature control is prevented from increasing. Furthermore, assuming that the first heating device and the cooling device are arranged to extend to the upper portion of the winding frame, since the first feed roller is provided in the winding section, the yarn is significantly bent between the first feed roller and the first heating device.However, since the first heating device and the cooling device are provided in the upper section of the working space, the bending of the yarn resulting from an increase in the height of the winding section is negligible. This reduces the stress on the yarn and serves to improve the yarn quality.

[0011] Furthermore, the first heating device and the cooling device are preferably arranged almost linearly along a horizontal direction. This results in a yarn path from the first feed roller to the cooling device becoming almost straight, thereby further reducing the degree of bending of the yarn moving along the yarn path from the feed roller to the cooling device. Consequently, the stress on the yarn is further reduced, resulting in further improved yarn quality.

[0012] Additionally, the first heater preferably includes a heater main body configured to enclose the moving yarn in a non-contact manner, and a heater configured to heat inside the heater main body. Compared with a heater configured to contact the yarn with an inner wall surface of the heater main body to heat the yarn, this structure allows the yarn to be heated evenly and quickly and enables a reduction in the length of the first heater. Furthermore, contact resistance acting on the yarn is reduced, thereby enabling high-speed winding.

[0013] Furthermore, the cooling device preferably comprises an air inlet duct with a slot formed therein, and the yarn moving near the slot is cooled by an airflow generated when air drawn through the air inlet duct flows into the air inlet duct through the slot. Compared with a cooling device configured to contact the yarn with a cooled cooling plate to cool the yarn, this structure enables the yarn to be cooled evenly and quickly. Consequently, the length of the cooling device can be reduced. Furthermore, the contact resistance acting on the yarn is reduced, enabling high-speed winding.

[0014] Furthermore, a second apron nip-type feed roller is preferably arranged between the false twisting device and the second heating device. The second feed roller guides the yarn at a higher speed than the first feed roller to pull the yarn. Consequently, a high tensile force is exerted on the yarn gripped by the second feed roller. To reliably guide the yarn held under tension downstream, the second feed roller must exert a high gripping force to prevent possible slippage between the second feed roller and the yarn. The second apron nip-type feed roller is designed to exert a strong gripping force.

[0015] In addition, it is preferable to provide two devices or two rollers in communication with the respective two yarns running parallel to each other for each of the first heating device, the cooling device, the false twisting device, and the feed roller arranged upstream of the second heating device in the yarn travel direction. For each of the second heating device and the feed roller arranged downstream of the second heating device, one device or one roller is provided in communication with the respective two yarns running parallel to each other. Consequently, the two yarns fed out of the respective false twisting devices pass through the one second heating device and are fed to the winding device by the one feed roller arranged downstream of the second heating device.This allows for a reduction in the number of second heaters and feed rollers arranged downstream of the second heater in the yarn travel direction. Consequently, the structure can be simplified.

[0016] A large number of bobbins are wound at the same time and can thus be wound in a short time. Furthermore, full bobbins can be unloaded into a free space arranged opposite a work space. Consequently, the space for storing full bobbins can be provided, while the work space is secured. Furthermore, even with an increase in the number of winding devices arranged in the vertical direction and consequently an increase in the height of the winding frame, the first heating device and the second cooling device are prevented from overlapping the winding frame in the vertical direction. Consequently, the height of the false twist texturing machine as a whole is prevented from increasing. The required size of the room in which the false twist texturing machine is housed remains unchanged, and costs for indoor temperature control are prevented from increasing.Furthermore, the first heating device and the cooling device are located in the upper section of the working chamber. Any possible bending of the yarn resulting from an increase in the height of the winding frame is negligible. This reduces the stress on the yarn, which serves to improve the yarn quality. Short description of the drawings Fig. 1 is a schematic plan view of a false twist texturing machine according to the present invention. Fig. Figure 2 is a schematic diagram showing an arrangement of devices along a yarn path. Fig. 3 is a vertical sectional view of a first heating device taken along a yarn moving direction. Fig. 4 is a vertical sectional view of a cooling device taken along a direction perpendicular to the yarn moving direction. Fig. 5 is a vertical sectional view of a second heater taken along a direction perpendicular to the yarn moving direction. Fig. 6 is a plan view of a second feed roller. Detailed description of preferred embodiments

[0017] An embodiment of the present invention will now be described. In the present embodiment, a false twist texturing machine that false twists and shrinks synthetic plastic fibers, such as polyester or polyamide, to produce a stretchable processed yarn is described.

[0018] First, the general structure of the false twist texturing machine is described with reference to Fig. 1. As described in Fig. 1, a false twist texturing machine 1 comprises a main frame 2 extending in the vertical direction and two winding stands 3 also extending in the vertical direction. The two winding stands 3 are arranged line-symmetrically with respect to the main frame 2, so that each of the winding stands 3 is arranged opposite the main frame 2 via a working space 6. A space 7 is provided opposite the working space 6 for the winding device 3, so that in the space 7, an operator picks up full bobbins P wound by the winding devices 15 provided in the winding stand 3 and described below.Furthermore, the false twist texturing machine comprises two yarn feed creels 5 (yarn feed sections) arranged opposite the respective two winding frames 3 in the corresponding spaces 7 and winding devices 15 designed to wind a yarn Y provided by each of the two yarn feed creels 5.

[0019] Furthermore, as in Fig. 1 and Fig. 2, the following are arranged on a yarn path from the yarn feed creel 5 to the winding devices 15 in the following order from the upstream side of the yarn movement direction: a first feed roller 20, a first heating device 11, a cooling device 12, a false twisting device 13, a second feed roller 21, a second heating device 14, and a third feed roller 22. Further, winding devices 15 are arranged in four stages in the vertical direction. For each of these devices and rollers, a plurality of devices or rollers are arranged in the vertical direction of the sheet of Fig. 1 arranged.

[0020] That is, in the false twist texturing machine 1, two groups of each of the devices are arranged along the yarn path from the yarn feed creel 5 to the winding devices 15 line-symmetrically with respect to the main frame 2. Furthermore, a plurality of groups of the devices are arranged in the vertical direction of the sheet of Fig. 1 arranged.

[0021] The first feed roller 20 is arranged at the upper end of the winding frame 3. The first heating device 15 is arranged at the upper portion of the working space 6. The cooling device is arranged closer to the main frame 2 than the first heating device 11, which is arranged in the upper portion of the working space 6. The false twisting device 13 is arranged in the upper portion of the space 3. The second feed roller 21 is arranged in the main frame 2 below the false twisting device 13. The second heating device 14 is arranged in the main frame below the second feed roller 21. Furthermore, the first heating device 11 and the cooling device 12 are arranged in the upper portion of the working space 6 almost rectilinearly along the horizontal direction. The yarn path from the yarn feed creel 5 to the winding devices 15 is formed to surround the working space 6.The first heating device 11 and the cooling device 12 are connected to a support section 4, which is designed to couple the main frame 2 to the winding frame 3. The positions of the first heating device 11 and the cooling device 12 are fixed.

[0022] A working corridor 17 is arranged in the working space 6. A threading operation conveying unit 18 moves on the upper surface of the working space 6 in the vertical direction of the sheet of Fig. 1. The operator can stand on the threading operation conveying unit 18 to perform threading operation and maintenance work at a high position near the first heating device 11 or the cooling device 12.

[0023] The first to third rollers 20 to 22 are rollers configured to guide the yarn from the upstream side to the downstream side of the yarn movement direction. The yarn feed speeds of the first feed roller 20 and the second feed roller 21 are set so that the second feed roller 20 feeds the yarn faster than the first feed roller 21. Consequently, the yarn Y is pulled between the first feed roller 20 and the second feed roller 21.

[0024] Furthermore, the yarn feed speeds of the second feed roller 21 and the third feed roller 22 are set so that the third feed roller 22 feeds the yarn more slowly than the second feed roller 21. Consequently, the yarn Y is loosened and thermally treated between the second feed roller 21 and the third feed roller 22.

[0025] A description will now be given of the operation of the false twist texturing machine 1 during a period from the feeding of the yarn Y from the yarn feed creel 5 until the yarn Y is wound in the winder 15. The yarn drawn between the first feed roller 20 and the second feed roller 21 is twisted by the false twister 13. Specifically, the false twister 13 is a belt-type nip twister comprising paired belts that cross each other and are configured to sandwich the moving yarn Y between the belts to twist and feed the yarn. The twist formed by the false twister 13 proceeds to the first feed roller 20, and the drawn and twisted yarn Y is then thermally set by the first heating device 11 and subsequently cooled by the cooling device 12.The twisted and thermally fixed yarn Y passes through the false twist device 13 and is then untwisted before it reaches the second feed roller 21.

[0026] The thus drawn and false-twisted textured yarn Y is loosened and thermally treated by the second heating device 14. The loosened and thermally treated yarn Y is then wound around a take-up tube by the winding device 15 to form a bobbin P. Full bobbins P are automatically removed from the winding device 15 and then stored in a storage device extending within the space 7 and located opposite the working space 6; the storage device is described below. Subsequently, the new take-up rolls are automatically attached to the winding device 15. The winding operation continues without operator intervention.

[0027] The first heating device 11 will now be described with reference to Fig. 3. As described in Fig. 3, the first heater 11 is, for example, a thermal treatment device described in Japanese Patent Publication No. JP 2856260 A, and includes an insulating material 31 extending linearly along the horizontal direction (yarn moving direction), an insulating cover 32 formed to cover the insulating material 31, two seeds heaters 35, 36 provided in the respective two heater main bodies 33, 34, which consist of two recesses formed in the insulating member 31, and two temperature sensors 37, 38 also provided in the respective two heater main bodies 33, 34.The temperature in the heater main bodies 33, 34 is controlled by feedback through the two temperature sensors 37, 38 to be suitable for adjusting the temperature of the yarn passing through the heater main bodies 33, 34 to a desired value according to the yarn feeding speed and the thickness and type of the yarn Y.

[0028] Yarn guides (not shown in the drawings), formed of ceramics, for example, are arranged in the heater main bodies 33, 34 at equal intervals along the yarn movement direction, extending from the inner wall surfaces of the heater main bodies 33, 34. The yarn Y passing through the heater main bodies 33, 34 contacts the yarn guides and is thus guided by the yarn guides. Consequently, the yarn Y is heated by the temperature in the heater main bodies 33, 34 without contacting the inner wall surfaces of the heater main bodies 33, 34.

[0029] Furthermore, the yarn moving through the heater main bodies 33, 34 is shaped like a circular arc because the yarn is guided by the yarn guides. Compared with a linear movement, this action allows positive vibrations (ballooning) to be prevented. Compared with a heater configured to contact the yarn Y with the inner wall surface of the heater main bodies 33, 34 to heat the yarn Y, the first heater 11 allows the yarn Y to be heated evenly and quickly by the air in the heater main bodies 33, 34. This enables a reduction in the length of the first heater 11 in the yarn movement direction. Furthermore, the contact resistance acting on the yarn Y is reduced, thereby enabling high-speed winding.

[0030] In the following, the cooling device 12 is described with reference to Fig. 4. As described in Fig. 4, the cooling device is a cooling device described in the unexamined Japanese patent application with publication number JP 9-316740 A and comprises an air inlet duct 41 extending in the vertical direction of the blade from Fig. 1. An exhaust fan (not shown in the drawings) whose electric motor speed is controlled by an inverter is connected to one end of the air intake duct 41 formed on one side of an extending direction of the air intake duct 41.

[0031] Two slits 42 are formed in the lower portion of the air intake duct 41 to separate them from each other along the extending direction. Two guides 43, 44 are provided outside each of the slits 42 to guide an air flow toward the air intake duct 41. The yarn Y moves outside the air intake duct 41 near each of the slits 42 and between the two guides 43, 44. In the present embodiment, the two yarns Y extending in the vertical direction of the sheet of Fig. 1, are cooled by a single cooling device 12. Contact elements 45, 46 are arranged discretely on the respective opposite surfaces of the two guides 43, 44 along the yarn movement direction. The contact elements 45, 46 are arranged in a zigzag pattern when viewed from above. The yarn Y, which moves between the two guides 43, 44, comes into alternating contact with the two contact elements 45, 46.

[0032] In the cooling device 11, when the exhaust fan is operated, air sucked in from the air inlet duct 41 flows into the air inlet duct 41 through the slots 42. At this time, the yarn Y comes into contact with the contact elements 45, 46, which have been cooled by an air flow flowing in each of the slots 42. The yarn Y is thereby cooled. Furthermore, the air flow flowing into the slots 42 directly cools the yarn Y. Consequently, the yarn is cooled by the two cooling actions and thus effectively cooled. The yarn Y can thus be cooled to the desired temperature. This enables a reduction in the length of the cooling device 12 in the yarn moving direction. Furthermore, the yarn Y, which is moved by the cooling device 12, comes into alternating contact with the contact elements 45, 46 instead of being in constant contact with the contact elements 45, 46.Therefore, the contact resistance acting on the yarn Y is reduced, enabling high-speed winding.

[0033] As described above, the first heating device 11 and the cooling device 12 have reduced lengths (1 m and 0.6 m, respectively, in the present embodiment) in the yarn movement direction. Consequently, the two devices can be arranged in the upper portion of the working space almost linearly along the horizontal direction. Assuming that the first heating device 11 and the cooling device 12 have long lengths in the yarn movement direction (2 to 2.5 m and 1.5 m, respectively, in the prior art), the working space 6 must be enlarged to allow the devices to be arranged in the upper portion of the working space 6. The enlarged working space 6 results in an increase in the size of the false twist texturing machine 1. Consequently, a larger space is also required in which the false twist texturing machine is housed. This increases the cost of indoor temperature regulation.

[0034] Furthermore, assuming that the first heater 11 and the cooling device 12 are arranged in the upper portion of the working space 6 so as to extend to the upper portion of the winding frame 3, the working space 6 does not need to be enlarged, but the yarn Y is significantly bent when it is guided from the first feed roller 20 provided on the winding frame 3 up to the first heater 11. This significant bending increases the tension on the yarn Y, thereby deteriorating the quality of the yarn Y. Consequently, the present embodiment reduces the length of the first heater 11 and the cooling device 12 in the yarn traveling direction to reduce the need to enlarge the working space 6. Consequently, the first heater and the cooling device 12 can be arranged in the upper portion of the working space 6 almost linearly along the horizontal direction.This prevents a potential increase in the cost of interior temperature control resulting from an increase in the size of the space in which the false twist texturing machine 1 is housed. Furthermore, the bending of the yarn Y between the first feed roller 20 and the first heating device 11 becomes insignificant. This serves to increase the quality of the yarn Y.

[0035] Now, the second heating device 14 is described with reference to Fig. 5. As described in Fig. 5, the second heating device 14 is provided in the main frame 2 along the vertical direction. A heat medium 42 is introduced into the second heating device 14 between two ducts 51, 53 extending in the vertical direction. The two ducts are introduced through a space 54 in the duct 53. The yarn Y is introduced through each of the ducts 55. When the heat medium 52 in the second heating device 14 is heated, heat from the heat medium 52 increases the temperature of the air in the space 54, in the duct 53, and the air in the space in the duct 55. Consequently, the yarn introduced through the duct 55 is heated. Each of the second heating devices 14 heats the yarns Y fed via the respective second feed rollers 21 through corresponding false twist devices 13 arranged side by side in the vertical direction of the sheet of Fig. 1 are arranged.

[0036] Then, as in Fig. 2, for each of the two feed rollers (not shown in the drawings) arranged on the downstream side of the second heating device 14 and including the third feed roller 22, the two yarns Y fed from the respective second heating device 14 are guided to the downstream side by a single feed roller. That is, the number of devices or rollers of the second heating devices 14 and the third feed roller 22 is half the number of devices or rollers of the first feed roller 20, the first heating device 11, the false twist device 13, and the second feed roller 21. Further, as described above, each of the cooling devices 12 cools the yarns Y extending in the vertical direction of the sheet from Fig. 1 move side by side. As in the case of the second heating device 14 and the third feed roller 22, the number of cooling devices 12 corresponds to half the number of devices or rollers of the first feed roller 20, the first heating device 11, the false twist device 13, and the second feed roller 21. This simplifies the structure of the false twist texturing machine 1, thereby reducing costs.

[0037] Now the winding device 15 is described. As in Fig. 1, the winding device comprises a take-up winder 61 and a doffing device 62.

[0038] The take-up winder 61 includes a stand configured to hold the take-up reel or reels P around which the yarn Y is wound, a winding reel configured to come into frictional contact with the take-up reel or reel P to rotate the take-up reel or reel P, and a traversing mechanism configured to traverse (pass) the yarn Y.

[0039] The take-off device 62 includes a stand operating mechanism configured to open, close, and expand the stand to move the bobbin P and to unload the bobbin P from the winding reel, a yarn cutting mechanism configured to cut the yarn connected to the bobbin P to be unloaded, an air sucker configured to suck in and hold the cut yarn end, a storage device in which the unloaded bobbin P is temporarily stored, a take-up reel holder in which take-up reels are accumulated, a take-up reel supply mechanism configured to supply the stand with a take-up reel, and a threading mechanism configured to thread the yarn onto the take-up reel gripped by the stand.

[0040] When a counter amount in a timer device reaches a predetermined value, the winding device 15, comprising the mechanisms described above, automatically removes the fully wound bobbin P from the stand and unloads the bobbin P into the storage device arranged behind the winding device 15. The winding device 15 then feeds the take-up reel to the stand via the take-up reel supply mechanism. The winding device 15 then allows the threading mechanism to thread the yarn Y into the take-up reel gripped from the stand to perform a winding operation. That is, winding can then be performed automatically without operator intervention until the winding operation has been performed on all the take-up reels accumulated in the take-up reel holder.

[0041] Now, the second feed roller 21 is rotated with reference to Fig. 6. As described in Fig. As shown in Figure 6, the second feed roller 21 is of the belt conveyor nip type and includes two driven rollers 65, 66 around which an endless belt 67 is wound, and a driven roller 68 in surface contact with the belt 67. In other words, the Y is gripped by the cooperation of the belt 67 and the two driven rollers and by the pressure on the roller 68, so that a strong gripping force is exerted by using the belt conveyor nip type feed roller 21. The second feed roller 21 is configured so that when the driven roller 68 is rotated, the belt 67 moves to move the driven rollers 65, 66 accordingly. The yarn Y fed by the false twisting device 13 is gripped between the belt 67 and the drive roller 68 and fed to the second heating device 14 arranged on the downstream side of the second feed roller 21 in the yarn moving direction.

[0042] The second feed roller 21 feeds the yarn Y faster than the first feed roller 20. Consequently, a tensile force acts on the yarn Y gripped by the second feed roller 21 to significantly pull the yarn. If an attempt is made to allow the nip roller to feed the significantly tensile-loaded yarn Y to the downstream side, slippage may occur between the nip roller and the yarn Y. This makes it difficult to apply the second tensile force to the yarn Y. Consequently, in the present embodiment, the second feed roller is of the belt conveyor nip type and allows the yarn to be gripped by a large contact surface between the belt surface 67 and the drive roller 68. This ensures a high gripping force and enables the yarn to be reliably guided to the downstream side with the desired tensile force applied to the yarn Y.

[0043] In the false twist texturing machine 1 according to the present invention, the winding devices 15 are arranged in four stages in the vertical direction. Consequently, the false twist texturing machine 1 according to the present invention enables more bobbins P to be wound in parallel than in a configuration in which the winding devices 15 are arranged in at most three stages. The false twist texturing machine 1 according to the present invention thus enables many bobbins P to be wound in a short time.

[0044] Generally, when the winding devices 15 are arranged in the winding frame 3 so as to be arranged in four stages in the vertical direction, the operator has difficulty replacing the bobbins P in the winding devices 15 arranged at higher positions. Therefore, the automatic replacement of the bobbins P eliminates the disadvantage of the operator's difficulty in replacing the bobbins P in the winding device 15 arranged at higher positions when the winding devices 15 are arranged in the winding frame 3 so as to be arranged in four stages in the vertical direction.

[0045] Furthermore, the automatic replacement of the bobbins P reduces the operation steps requiring operator intervention, thereby enabling a reduction in the number of operators. On the other hand, when the number of operators is reduced, the number of times the full bobbin is lifted is also preferably reduced. However, this requires a space in which full bobbins P are stored. Therefore, in the present embodiment, the full bobbins P can be unloaded into the free space (space 7) located opposite the work space 6. This is to prevent the following problem that may occur when full bobbins P are unloaded into the work space: Unless the bobbins P are lifted, a large number of bobbins P accumulate in the work space, which is thereby gradually reduced. Consequently, many bobbins P can be stored in the free space.This reduces the frequency at which full coils must be lifted, thereby increasing work efficiency.

[0046] Furthermore, the first heating device and the cooling device are provided in the upper portion of the working space 6. Consequently, even if the number of stages in which the winding devices 15 are arranged in the vertical direction is increased to four, the first heating device 11 and the cooling device 12 are prevented from overlapping the winding frame 3 in the vertical direction. This makes it impossible to increase the height of the false twist texturing machine as a whole. The required size of the space in which the false twist texturing machine is housed remains unchanged, and the cost of indoor temperature control is prevented from increasing.

[0047] Furthermore, it is assumed that winding devices are arranged in three stages in the vertical direction and four rows of winding devices 15 per span in the vertical direction of the sheet of Fig. 1. Consequently, a false twist texturing machine 1 winds the coils P in a total of 24 units. Furthermore, if ten spans of the false twist texturing machine 1 in the vertical direction of the sheet of Fig. 1, a total of 240 units are wound. The unit refers to a set of devices required to wind a yarn Y.

[0048] On the other hand, in the present invention, winding devices 15 are arranged in four stages in the vertical direction, and four rows of winding devices 15 are arranged per span in the vertical direction of the sheet of Fig. 1. Consequently, one false twist texturing machine can wind the bobbins P in units of 32 units. If a plurality of the false twist texturing machines 1 are provided to enable nearly 240 bobbins P to be wound as described above, only seven to eight spans in the vertical direction of the sheet need to be Fig. 1. Consequently, a comparison between the conventional art and the present embodiment, based on the same number of units, shows that the present invention enables a reduction in the number of false twist texturing machines 1 required. Consequently, a smaller space can be used to accommodate the false twist texturing machines, enabling a reduction in the cost of indoor temperature regulation.

[0049] Now, variations in which various changes were made to the above-described embodiment will be described. Components of the variations that are similar to corresponding components of the above-described embodiments are denoted by the same reference numerals. Description of these components will be omitted as appropriate.

[0050] In the present embodiment, the first heater 11 and the cooling device 12 are provided in the upper portion of the working space 6 almost linearly along the horizontal direction. However, the first heater 11 and the cooling device 12 may be provided in the upper portions of the working space 6 and a winding frame 3 along a direction including a vertical component. Alternatively, the first heater 11 and the cooling device 12 may extend from the upper portion of the working space 6 to the upper portions of the winding frame 3 or even to the upper portion of the main frame 2. This structure is used, for example, when the yarn Y is very thick and the first heater 11 must have a long length to heat the yarn Y to the desired temperature. This also applies to the cooling device 12.

[0051] Furthermore, the false twisting device 13 is not limited to the belt-driven gripper twisting device, but can be of any type, provided that the false twisting device can also false twist the yarn. The false twisting device 13 can, for example, be a twisting device of the friction disc type.

[0052] Furthermore, the first heater 11 does not necessarily have to be configured so that the yarn Y avoids contacting the inner wall surfaces of the heater main bodies 33, 34 as described above. The first heater 11 may be configured so that the yarn Y contacts the inner wall surfaces or may be configured to contact the second heater in a similar manner.

[0053] Additionally, the cooling device does not necessarily have to be configured to cool the yarn Y using an air flow as described above. The cooling device 12 must be configured to allow the yarn Y to come into contact with a contact element, such as a cooling plate, to cool the yarn Y.

[0054] Furthermore, the second feed roller 21 is not limited to the belt conveyor nip type. The second feed roller 21 can be of any type, provided that the second feed roller 21 enables the application of a strong gripping force or nip force. For example, the surface of the gripping roller can be machined to exert a strong adhesive force to increase the gripping force.

Claims

[1] False-spindle texturing machine (1) characterized by , that the false-spin texturing machine includes a yarn feed section (5); a plurality of feed rollers (20, 21, 22) designed to allow a yarn (Y) fed from the yarn feed section (5) to move; a winding device (15) designed to wind the moving yarn (Y); and a first heating device (11), a cooling device (12), a false twist device (13) and a second heating device (14), which are arranged in this order from an upstream side of a yarn movement direction along a yarn web from the yarn feed section (5) towards the winding device (15), and by providing the false twist device (13) and the second heating device (14) on a main frame (2) and the winding device (15) on a winding frame (3) which is provided via a working space (6) opposite the main frame (2), a first feed roller (20) is arranged in the winding frame (3) to feed the yarn (Y) supplied by the yarn feed section (5) to the first heating device (11), and the first heating device (11) and the cooling device (12) are provided in an upper section of the working space (6), and the winding device (15), the main frame (2) and the yarn feed section (5) do not overlap in the vertical direction, and that the winding frame (3) has winding devices (15) arranged in four stages. [2] False-swirl texturing machine according to claim 1, characterized by, that the first heating device (11) and the cooling device (12) are arranged almost linearly along a horizontal direction. [3] False-swirl texturing machine according to claim 2, characterized by , that the first heating device (11) comprises a heater main body (33, 34) configured to surround the moving yarn in a non-contacting manner and a heater configured to heat the interior of the heater main body (33, 34). [4] False-twist texturing machine according to claim 2 or 3, characterized by , that the cooling device (12) comprises an air inlet line (41) with a slot (42) formed therein and the yarn (Y) moving near the slot (42) is cooled by an airflow generated when air drawn in through the air inlet line (41) flows into the air inlet line (41) through the slot (42). [5] False-swirl texturing machine according to any one of claims 1 to 4, characterized by , that a second feed roller of the belt conveyor gap type is arranged between the false swirl device (13) and the second heating device (14). [6] False-swirl texturing machine according to any one of claims 1 to 5, characterized by , that for each of the first heating device (11), the cooling device (12), the false twist device (13) and the feed roller, which are arranged on the upstream side of the second heating device (14) in the direction of yarn movement, two devices or two rollers are provided according to the corresponding two yarns (Y) which move parallel to each other, wherein for the second heating device (14) and the feed roller which are arranged on the downstream side of the heating device a device or roller is provided in accordance with the two yarns (Y) which move parallel to each other, and wherein the two yarns (Y) which are led out of the corresponding two false twist devices move through a second heating device and are fed to the winding device by a feed roller which is arranged downstream of the second heating device.

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