Fiber bundle treatment assembly, fiber bundle treatment device, and spinning machine

Abstract

The present application relates to a fiber bundle processing assembly, a fiber bundle processing device, and a spinning machine. The fiber bundle processing assembly (40) has a draft lower roller set (42), a driving portion, and a draft base (41). The draft base (41) supports the draft lower roller set (42) and the driving portion, and is supported by two supports. When viewed in the roller shaft direction of the draft lower roller set (42), the rotation center of the motor of at least one of the front lower roller (42a) and the middle lower roller (42b) is located in a first region bounded by an imaginary line passing through the centers of the two supports. The rotation center of the motor of the rear lower roller (42d) is located in a second region bounded by an imaginary line.

Description

Technical Field

[0001] This invention mainly relates to a fiber bundle processing assembly for processing fiber bundles. Background Technology

[0002] Patent document 1 is Japanese Patent Application Publication No. 2020-200573. Patent document 2 is Japanese Patent Application Publication No. 2004-169264.

[0003] Patent document 1 discloses a drafting device unit comprising multiple upper rollers and multiple lower rollers. The drafting device unit includes a frame structure. The frame structure is mounted on a support tube of a frame of fiber machinery.

[0004] Patent document 2 discloses a drawing device comprising a front roller pair, a middle lower roller pair, a third roller pair, and a rear roller pair. The front lower roller, the middle lower roller, the third lower roller, and the rear lower roller are each driven by a different motor.

[0005] Patent documents 1 and 2 do not describe the layout of the motors in the drafting unit. An inappropriate layout of the motors could potentially increase the overall size of the drafting unit. Summary of the Invention

[0006] The present invention was made in view of the above circumstances, and its main objective is to provide a compact structure in a fiber bundle processing assembly having a lower roller driven by a motor.

[0007] The problem to be solved by the present invention is as described above. The means used to solve the problem and its effects will be described below.

[0008] According to a first aspect of the present invention, a fiber bundle processing assembly with the following structure is provided. That is, the fiber bundle processing assembly includes a lower drafting roller assembly, a drive unit, and a drafting base. The lower drafting roller assembly, together with the upper drafting roller assembly, clamps the fiber bundle for elongation. The drive unit includes multiple motors that drive the lower drafting roller assembly. The drafting base supports the lower drafting roller assembly and the drive unit, and is supported by two pillars. The lower drafting roller assembly includes a front lower roller, a middle lower roller, and a rear lower roller arranged sequentially from downstream to upstream in the fiber travel direction. When viewed in the roller axis direction of the lower drafting roller assembly, the rotation center of the motor driving at least one of the front lower roller and the middle lower roller is located in a first region bounded by an imaginary line passing through the center of each of the two pillars. The rotation center of the motor driving the rear lower roller is located in a second region bounded by the imaginary line.

[0009] When all motors are arranged together in a first or second region bounded by an imaginary line, the motors are located significantly outward from the imaginary line, thus increasing the size of the fiber bundle processing assembly. In contrast, in this invention, the motors can be distributed across the first and second regions, thereby enabling a miniaturization of the fiber bundle processing assembly.

[0010] In the fiber bundle processing assembly described above, it is preferable that the area where the lower drafting roller group is configured is the second region when viewed in the direction of the roller axis.

[0011] This allows a smaller motor driving the lower rear roller to be positioned in the second area. As a result, the distance between the lower drafting roller assembly and the support is shortened, thus reducing vibration of the lower drafting roller assembly.

[0012] In the aforementioned fiber bundle processing assembly, the following structure is preferred: The drafting lower roller assembly further includes a third lower roller, which is positioned between the middle lower roller and the rear lower roller. The drive unit includes a first motor, a second motor, a third motor, and a fourth motor as the aforementioned plurality of motors. The first motor drives the front lower roller. The second motor drives the middle lower roller. The third motor drives the third lower roller. The fourth motor drives the rear lower roller. The rotation centers of the first motor and the second motor are located in the first region bounded by the aforementioned imaginary line. The rotation centers of the third motor and the fourth motor are located in the second region bounded by the aforementioned imaginary line.

[0013] This allows the four motors to be distributed and configured in the first and second regions, thus enabling further miniaturization of the fiber bundle processing assembly.

[0014] In the aforementioned fiber bundle processing assembly, the following structure is preferred: When viewed in the direction of the roller axis, the first motor and the second motor are arranged along the fiber travel direction. The third motor and the fourth motor are arranged along the fiber travel direction. The second motor and the third motor are arranged in a direction orthogonal to the fiber travel direction.

[0015] Therefore, the positions of the second motor and the third motor overlap in the fiber travel direction, thus enabling the fiber bundle processing assembly to be miniaturized in the fiber travel direction.

[0016] In the fiber bundle processing assembly described above, the following structure is preferred: The motor driving the front lower roller is a DC brushless motor. The motor driving at least one of the middle lower roller and the rear lower roller is a stepper motor.

[0017] Therefore, since the front lower roller rotates at high speed, the rotation of the front lower roller can be stably controlled by using a DC brushless motor as the motor to drive the front lower roller.

[0018] In the fiber bundle processing assembly described above, it is preferable to include an air-jet spinning device, which is installed directly or via a component on the drafting base and uses a swirling airflow to spin the fiber bundle supplied from the drafting lower roller assembly to generate yarn.

[0019] Therefore, the drafting lower roller assembly and the air-jet spinning device are supported by a common component, which improves the accuracy of the positional relationship between the drafting lower roller assembly and the air-jet spinning device.

[0020] In the aforementioned fiber bundle processing assembly, the drive unit includes at least a first motor and a second motor as one of the aforementioned plurality of motors. The first motor drives the front lower roller, and the second motor drives the middle lower roller. Preferably, when viewed in the direction of the roller axis, the support shaft of the air-jet spinning device is disposed between the rotation center of the first motor and the rotation center of the second motor in the fiber travel direction.

[0021] Therefore, the support shaft of the air-jet spinning device can be configured using the space between the first motor and the second motor, so that even if the fiber bundle processing assembly is equipped with an air-jet spinning device, the size of the fiber bundle processing assembly can be miniaturized.

[0022] In the aforementioned fiber bundle processing assembly, the following structure is preferred: The drive unit includes at least a first motor as one of the aforementioned plurality of motors, which drives the front lower roller. At least a portion of the air-jet spinning device is movable. A space is formed between the first motor and the air-jet spinning device for moving at least a portion of the air-jet spinning device.

[0023] Therefore, at least a portion of the air-jet spinning device can be moved using the space between the first motor and the air-jet spinning device.

[0024] In the aforementioned fiber bundle processing assembly, the following structure is preferred: at least one of the front lower roller, the middle lower roller, and the rear lower roller is supported by a single arm in the roller axis direction. The area supported by a single arm relative to the fiber travel path is referred to as the support area. The central position of the housing of the motor that drives at least one of the front lower roller and the middle lower roller in the roller axis direction is located in the support area.

[0025] Therefore, the motor driving at least one of the front lower roller and the middle lower roller can be arranged in the attachment of the support area, so the motor is not easily located outside the roller axis direction, and the size of the fiber bundle processing assembly in the roller axis direction can be miniaturized.

[0026] In the fiber bundle processing assembly described above, the following structure is preferred: two lower drawing roller groups are arranged along the roller axis. The support regions of the two lower drawing roller groups are opposite each other.

[0027] Therefore, the support areas of the two lower drawing roller groups can be arranged close to each other, thus simplifying the support structure.

[0028] According to a second aspect of the present invention, a fiber bundle processing apparatus with the following structure is provided. The fiber bundle processing apparatus includes a fiber bundle processing assembly, a drafting upper roller assembly, and a drafting cradle. The drafting cradle supports the drafting upper roller assembly.

[0029] According to a third aspect of the present invention, a spinning machine with the following structure is provided. The spinning machine includes a fiber bundle treatment device, a lead-out device, and a winding device. The lead-out device leads the yarn out from the fiber bundle treatment device. The winding device winds the yarn to form a package.

[0030] The above describes fiber bundle processing devices or spinning machines that can achieve miniaturization.

[0031] In the aforementioned spinning machine, it is preferable that the cross-sectional shape of the support column is any one of the following: circular, polygonal, a shape obtained by removing a portion of a circle, or a shape obtained by removing a portion of a polygon.

[0032] Therefore, the shape of the support is simple, which reduces manufacturing costs.

[0033] According to a fourth aspect of the present invention, a fiber bundle processing assembly with the following structure is provided. That is, the fiber bundle processing assembly includes a lower drafting roller assembly and a drive unit. The lower drafting roller assembly includes a plurality of lower drafting rollers, which, together with the upper drafting roller assembly, clamp the fiber bundle for elongation. The drive unit includes at least three motors arranged for each of the lower drafting rollers, each individually driving one of the lower drafting rollers. The motor with the highest maximum rotational speed among the three motors is arranged at the bottom, and the motor with the lowest maximum rotational speed is arranged at the top.

[0034] According to a fifth aspect of the present invention, a fiber bundle processing assembly with the following structure is provided. That is, the fiber bundle processing assembly includes a lower drafting roller assembly and a drive unit. The lower drafting roller assembly includes a plurality of lower drafting rollers, which, together with the upper drafting roller assembly, clamp the fiber bundle for elongation. The drive unit includes at least three motors arranged for each of the lower drafting rollers, each motor individually driving the lower drafting roller. The motor with the highest power consumption among the three motors is arranged at the bottom, and the motor with the lowest power consumption is arranged at the top.

[0035] According to a sixth aspect of the present invention, a fiber bundle processing assembly with the following structure is provided. That is, the fiber bundle processing assembly includes a lower drafting roller assembly and a drive unit. The lower drafting roller assembly includes a plurality of lower drafting rollers, which, together with the upper drafting roller assembly, clamp the fiber bundle for elongation. The drive unit includes at least three motors arranged for each of the lower drafting rollers, each individually driving a lower drafting roller. The three motors include DC brushless motors and stepper motors. The DC brushless motors are positioned below the stepper motors.

[0036] The above allows for the placement of a relatively heavy motor at the bottom, thus enabling the fiber bundle processing assembly to operate stably. Attached Figure Description

[0037] Figure 1 This is a front view of a spinning machine according to one embodiment of the present invention.

[0038] Figure 2 This is a side view of the spinning unit.

[0039] Figure 3 This is an enlarged side view of the fiber bundle processing device.

[0040] Figure 4 This is a three-dimensional view of the fiber bundle processing assembly.

[0041] Figure 5 This is a side view of the fiber bundle processing assembly.

[0042] Figure 6 This is a rear view of the fiber bundle processing assembly. Detailed Implementation

[0043] Next, an embodiment of the present invention will be described with reference to the accompanying drawings. Figure 1 The spinning machine 1 shown has multiple spinning units 2, a frame 3, and a yarn receiving trolley 30 arranged in parallel.

[0044] like Figure 2 As shown, each spinning unit 2, from upstream to downstream, sequentially includes a fiber bundle guiding section 4, a fiber bundle processing device 5, a yarn monitoring device 6, a yarn storage device (lead-out device) 7, and a winding section (winding device) 8. Each device in the spinning unit 2 is supported by a frame 3. Furthermore, in this specification, "upstream" and "downstream" refer to the upstream and downstream directions of the fiber bundle and yarn during spinning.

[0045] The fiber bundle guide 4 guides the fiber bundle 10 supplied from the sliver can (not shown in the figure). The fiber bundle 10 guided by the fiber bundle guide 4 is then supplied to the fiber bundle processing device 5.

[0046] The fiber bundle processing device 5 spins the fiber bundle 10 to generate yarn 15 after drafting. The fiber bundle processing device 5 includes a drafting lower roller group 42 and a drafting upper roller group 60 as components for drafting. The drafting lower roller group 42 has multiple drafting lower rollers. The drafting lower rollers are driven to rotate by a motor described later. The drafting upper roller group 60 has multiple drafting upper rollers. The drafting lower rollers and drafting upper rollers are configured to face each other. By conveying the fiber bundle 10 between the drafting lower rollers and the drafting upper rollers, the fiber bundle 10 can be lengthened.

[0047] The fiber bundle processing apparatus 5 includes an air-jet spinning device 70 as a component for spinning. The air-jet spinning device 70 generates a swirling airflow internally. The air-jet spinning device 70 uses the swirling airflow to twist the fiber bundle 10 supplied from the lower drafting roller group 42 and the upper drafting roller group 60 to generate yarn 15. Alternatively, a ring spinning apparatus can be used instead of the air-jet spinning device 70. Details regarding the fiber bundle processing apparatus 5 will be described later.

[0048] The yarn 15 generated by the air-jet spinning device 70 passes through the yarn monitoring device 6. The yarn monitoring device 6 uses an optical sensor (not shown) to monitor the thickness of the traveling yarn 15. When the yarn monitoring device 6 detects a defect in the yarn 15 (e.g., an abnormality in the thickness of the yarn 15), it sends a defect detection signal to the unit control unit 26. Upon receiving the defect detection signal, the unit control unit 26 cuts the yarn 15. The unit control unit 26 can either stop the air-jet spinning device 70 to cut the yarn 15 or drive the cutter to cut the yarn 15. Furthermore, the yarn monitoring device 6 is not limited to an optical sensor; for example, a capacitive sensor can also be used to monitor the thickness of the yarn 15. Additionally, as a defect, it can also monitor foreign matter contained in the yarn 15 and / or abnormalities in the tension of the yarn 15.

[0049] The yarn 15, which has passed through the yarn monitoring device 6, is wound onto the bobbin 17 by the winding section 8. The winding section 8 winds the yarn 15 to form a package 18. The winding section 8 includes a cradle arm 19, a winding roller 20, and a traversing device 21.

[0050] The rocker arm 19 supports the bobbin 17 for winding the yarn 15 so that it can rotate. The winding roller 20 is driven to rotate by contacting the outer peripheral surface of the bobbin 17 (or the package 18), thereby causing the bobbin 17 to rotate passively. The traverse device 21 includes a traverse guide 22. The traverse guide 22 engages with the yarn 15 and is driven along the width direction of the bobbin 17. Thus, the yarn 15 wound on the bobbin 17 can be traversely moved.

[0051] With the above-described structure, the spinning unit 2 can generate yarn 15 from the fiber bundle 10 and wind it onto the bobbin 17. Furthermore, each spinning unit 2 may have one drive unit for driving the winding roller 20 and one drive unit for driving the traverse device 21. Alternatively, the spinning machine 1 may be equipped with a drive unit that drives the winding rollers 20 of multiple spinning units 2 simultaneously, and a drive unit that drives the traverse devices 21 of multiple spinning units 2 simultaneously.

[0052] Furthermore, in the spinning machine 1 of this embodiment, a yarn retention device 7 is disposed between the yarn monitoring device 6 and the winding section 8. For example... Figure 2 As shown, the yarn retention device 7 includes a yarn retention roller 23 and an electric motor 25 that drives the yarn retention roller 23 to rotate.

[0053] The yarn retention roller 23 is driven to rotate by the electric motor 25, thereby drawing the yarn 15 from the air-jet spinning device 70 by the yarn retention device 70. The yarn retention roller 23 can temporarily retain the drawn yarn 15 by winding it around its outer circumference. Because the yarn 15 is temporarily retained in this way, the yarn retention device 7 functions as a buffer. As a result, the undesirable situation where the spinning speed in the air-jet spinning device 70 is inconsistent with the winding speed in the winding section 8 due to some reason (such as loosening of the yarn 15) can be eliminated.

[0054] In addition, each spinning unit 2 includes a unit control unit 26. The unit control unit 26 appropriately controls the various structures of the spinning unit 2. One unit control unit 26 may also be configured to control a predetermined number of spinning units 2.

[0055] like Figure 1 and Figure 2 As shown, the yarn receiving trolley 30 is equipped with a yarn receiving device 31, a suction pipe 32, and a suction nozzle 33.

[0056] The yarn splicing device 31 is a device for joining yarn ends together. The structure of the yarn splicing device 31 is not particularly limited; for example, an air-jet splicer that uses a swirling airflow to twist the yarn ends together can be used. The yarn splicing device 31 can also be a knotter that mechanically connects yarn ends together. The suction tube 32 draws in the yarn end delivered from the air-jet spinning device 70, captures it, and guides it towards the yarn splicing device 31. The suction nozzle 33 draws in the yarn end from the package 18 supported on the winding section 8, captures it, and guides it towards the yarn splicing device 31.

[0057] The yarn splicing device 31 joins the yarn ends guided by the suction tube 32 and the suction nozzle 33 together. As a result, the cut yarn 15 becomes continuous again between the air-jet spinning device 70 and the winding section 8.

[0058] Next, refer to Figure 3 The fiber bundle processing device 5 will be described.

[0059] like Figure 3 As shown, the fiber bundle processing apparatus 5 includes a drafting base 41. The drafting base 41 is a frame-shaped component. A drafting lower roller assembly 42 and an air-jet spinning device 70 are mounted on the drafting base 41. Hereinafter, the drafting base 41 and the components mounted on the drafting base 41 (specifically, the drafting lower roller assembly 42 and the air-jet spinning device 70) are collectively referred to as the fiber bundle processing assembly 40. Furthermore, as... Figure 3 As shown, the drafting lower roller assembly 42 comprises, sequentially from downstream to upstream in the fiber travel direction, a front lower roller 42a, a middle lower roller 42b, a third lower roller 42c, and a rear lower roller 42d. Additionally, a lower conveyor belt 42e is wound around the middle lower roller 42b and the tension bar.

[0060] like Figure 3 As shown, the fiber bundle processing apparatus 5 includes a drafting cradle 61. A drafting upper roller assembly 60 is mounted on the drafting cradle 61, and the drafting cradle 61 supports the drafting upper roller assembly 60. The drafting cradle 61 can be opened and closed relative to the fiber bundle processing assembly 40. By closing the drafting cradle 61, the drafting upper roller assembly 60 comes into contact with or approaches the drafting lower roller assembly 42. Figure 3 As shown, the drafting upper roller group 60 includes a front upper roller 60a, a middle upper roller 60b, a third upper roller 60c, and a rear upper roller 60d sequentially from downstream to upstream in the fiber travel direction. Additionally, an upper conveyor belt 60e is wound around the middle upper roller 60b.

[0061] Next, refer to Figures 4 to 6 The fiber bundle processing assembly 40 will now be described. In this description, the arrangement of two components (e.g., a motor) includes not only a state where the two components are strictly arranged so that their central positions (e.g., axis positions) coincide, but also a state where their central positions are offset. Therefore, for example, if the arrangement is described as the two components being arranged along a first direction, it includes not only a state where the central positions of the two components in the first direction coincide, but also a state where the positions occupied by the two components in the first direction overlap.

[0062] like Figure 4 As shown, in the spinning machine 1 of this embodiment, two drafting lower roller groups 42 are arranged in a parallel configuration. The parallel direction of the drafting lower roller groups 42 is the same as the axial direction (hereinafter referred to as the roller axis direction) of each drafting roller in the drafting lower roller group 42. The two drafting lower roller groups 42 and their supporting structures are identical, or symmetrically constructed about the line of symmetry 102, and will therefore be described together. Furthermore, in Figure 4 The front lower roller 42a, middle lower roller 42b, lower belt 42e, and air-jet spinning device 70 of one of the two drafting lower roller groups 42 are omitted from the illustration.

[0063] like Figure 5 As shown, the stretching base 41 is supported by two supports 3a and 3b. The two supports 3a and 3b can be either part of the frame 3 or separate components fixed to the frame 3. Figure 4 As shown, the drafting base 41 is positioned in the region between the two drafting lower roller groups 42. Specifically, when viewed in a direction orthogonal to both the roller axis direction and the fiber travel direction, the drafting base 41 is positioned in the region between the two drafting lower roller groups 42. Thus, one drafting base 41 can be used for both drafting lower roller groups 42. However, the drafting base 41 can also be configured for each drafting lower roller group 42. In this case, when viewed in a direction orthogonal to both the roller axis direction and the fiber travel direction, two drafting lower roller groups 42 are configured, along with a first drafting base overlapping one of the drafting lower roller groups 42, and a second drafting base overlapping the other of the drafting lower roller groups 42.

[0064] like Figure 4 As shown, the fiber bundle processing assembly 40 includes a first support portion 43a, a second support portion 43b, a third support portion 43c, and a fourth support portion 43d, which are directly or indirectly mounted on the drawing base 41. The first support portion 43a supports the front lower roller 42a with a single arm. The second support portion 43b supports the middle lower roller 42b with a single arm. "Single arm" refers to the case where only one end of the roller in the axial direction is supported by a component, and the other end in the axial direction is not supported by other components. The third support portion 43c supports the third lower roller 42c with two arms. The fourth support portion 43d supports the rear lower roller 42d with two arms. "Two arms" refers to the case where both ends in the axial direction of the roller are supported by other components.

[0065] The first support portion 43a and the second support portion 43b respectively support the ends of the front lower roller 42a and the middle lower roller 42b on the side closest to the line of symmetry 102 (in other words, the ends on the side where the other drafting lower roller group 42 is located). Hereinafter, based on the fiber travel path 101, the area supported by a single arm is referred to as the support area, and the area not supported by a single arm is referred to as the free area.

[0066] The fiber bundle processing assembly 40 includes an adjustment mechanism 44 for individually adjusting the position of the fiber travel direction of the third lower roller 42c and the rear lower roller 42d. The adjustment mechanism 44 includes a sliding surface 44a and connecting members 44b and 44c. The sliding surface 44a is mounted on the drafting base 41. The connecting member 44b connects two arranged third support portions 43c to each other. The connecting member 44c connects two arranged fourth support portions 43d to each other. The connecting members 44b and 44c are slidable on the sliding surface 44a along the fiber travel direction. Additionally, mounting holes are formed in the connecting members 44b and 44c. In this embodiment, two mounting holes are formed in each connecting member 44b and 44c, but the number of mounting holes is not particularly limited. By inserting fasteners into each mounting hole for fastening, the sliding of the connecting members 44b and 44c relative to the sliding surface 44a can be restricted. The positions of the fiber travel direction of the third lower roller 42c and the rear lower roller 42d can be adjusted independently.

[0067] In this embodiment, because the connecting member 44b is provided, the positions of the fiber travel directions of the two third lower rollers 42c can be adjusted together. This reduces the adjustment time. Furthermore, the positions of the fiber travel directions of the two third lower rollers 42c can be aligned. This reduces the quality deviation of the generated yarn 15. Alternatively, a structure can be adopted in which the connecting member 44b is omitted, allowing for individual adjustment of the positions of the fiber travel directions of the two arranged third lower rollers 42c. The above-described effects and variations also apply to the rear lower roller 42d.

[0068] A space is formed between the adjusting mechanism 44 and the drafting base 41, excluding the portion where the adjusting mechanism 44 contacts the drafting base 41. Wiring and / or piping associated with the fiber bundle processing assembly 40 can be configured in this space, for example. Thus, the wiring and / or piping are protected by the adjusting mechanism 44. That is, the adjusting mechanism 44, in addition to its connecting function, also has a protective function.

[0069] The fiber bundle processing assembly 40 includes a drive unit 45 for driving the drafting lower roller assembly 42. In this embodiment, the drive unit 45 includes multiple motors provided for each drafting lower roller. Therefore, the drive unit 45 can drive the drafting lower rollers individually. However, multiple (e.g., two) drafting lower rollers arranged along the fiber travel direction can also be driven together by a single motor.

[0070] like Figure 5 and Figure 6 As shown, the drive unit 45 includes a first motor 45a, a second motor 45b, a third motor 45c, and a fourth motor 45d.

[0071] A first motor 45a drives the front lower roller 42a to rotate. The first motor 45a includes a first housing 46a and a first output shaft 47a. Motor structural components are housed within the first housing 46a. A first drive pulley 50a is mounted on the first output shaft 47a. Conversely, a first driven pulley 51a is mounted on the front lower roller 42a. A first belt 52a is wound around the first drive pulley 50a and the first driven pulley 51a. With this structure, the front lower roller 42a can be driven to rotate using the power generated by the first motor 45a.

[0072] Similarly, the second motor 45b includes a second housing 46b and a second output shaft 47b. Motor structural components are housed within the second housing 46b. A second drive pulley 50b is mounted on the second output shaft 47b. Conversely, a second driven pulley 51b is mounted on the lower roller 42b. A second belt 52b is wound around the second drive pulley 50b and the second driven pulley 51b. With this structure, the power generated by the second motor 45b can drive the lower roller 42b to rotate.

[0073] like Figure 6 As shown, the first motor 45a and the second motor 45b are disposed in the support area. Specifically, the central position (marked with a circle) of the roller axis of the first housing 46a and the second housing 46b is located in the support area. In addition, the first output shaft 47a and the second output shaft 47b are located in the support area and protrude in a direction away from the fiber travel path.

[0074] Assuming the position of the first output shaft 47a is the same as in this embodiment, but the protruding direction of the first output shaft 47a is opposite (i.e., the orientation of the first motor 45a is opposite), the first motor 45a is positioned significantly away from the fiber travel path. As a result, the size of the fiber bundle processing assembly 40 in the roller axis direction becomes larger. In contrast, in this embodiment, the first output shaft 47a protrudes in a direction away from the fiber travel path (and in a direction parallel to the roller axis direction), thus allowing the first motor 45a to be positioned near the fiber travel path. The same applies to the second motor 45b. As a result, the size of the fiber bundle processing assembly 40 in the roller axis direction can be miniaturized.

[0075] Furthermore, the first drive pulley 50a, the first driven pulley 51a, and the first belt 52a are arranged together in the support area. Similarly, the second drive pulley 50b, the second driven pulley 51b, and the second belt 52b are arranged together in the support area. Additionally, the front lower roller 42a and the middle lower roller 42b are supported by a single arm in the support area. Through the above, the roller axis dimensions in the portion containing the front lower roller 42a and the middle lower roller 42b can be miniaturized.

[0076] The third motor 45c drives the third lower roller 42c to rotate. The third motor 45c includes a third housing 46c and a third output shaft 47c. The motor structure components are built into the third housing 46c. The third drive pulley 50c is mounted on the third output shaft 47c. On the other hand, the third driven pulley 51c is mounted on the third lower roller 42c. A third belt 52c is wound around the third drive pulley 50c and the third driven pulley 51c. With the above structure, the power generated by the third motor 45c can drive the third lower roller 42c to rotate.

[0077] A fourth motor 45d drives the rear lower roller 42d to rotate. The fourth motor 45d includes a fourth housing 46d and a fourth output shaft 47d. Motor components are housed within the fourth housing 46d. A fourth drive pulley 50d is mounted on the fourth output shaft 47d. Conversely, a fourth driven pulley 51d is mounted on the rear lower roller 42d. A fourth belt 52d is wound around the fourth drive pulley 50d and the fourth driven pulley 51d. With this structure, the power generated by the fourth motor 45d can drive the rear lower roller 42d to rotate.

[0078] like Figure 6 As shown, the third motor 45c and the fourth motor 45d are disposed in the free region. Specifically, the central position (marked with a circle) of the roller axis direction of the third housing 46c and the fourth housing 46d is located in the free region. In addition, the third output shaft 47c and the fourth output shaft 47d are located in the free region and protrude in a direction away from the fiber travel path (and in a direction parallel to the roller axis direction).

[0079] Therefore, for the same reasons as the explanation regarding the orientation of the first motor 45a and the second motor 45b, the size of the roller axis of the fiber bundle processing assembly 40 can be miniaturized.

[0080] Furthermore, the adjustment mechanism 44 is located in the support area. On the other hand, the third drive pulley 50c, the third driven pulley 51c, the third belt 52c, the fourth drive pulley 50d, the fourth driven pulley 51d, and the fourth belt 52d are located in the free area. Therefore, a large adjustment space can be ensured for the operator to use the adjustment mechanism 44.

[0081] The air-jet spinning device 70 includes a first block 71, a second block 72, a first arm 73, a second arm 74, and a support shaft 75.

[0082] A fiber bundle 10 fed from the front lower roller 42a and the front upper roller 60a is supplied to the first block 71. A nozzle is formed in the first block 71, and a swirling airflow is generated by ejecting air from the nozzle. The generated swirling airflow acts on the fiber bundle 10. A hollow guide shaft is provided in the second block 72. By the action of the swirling airflow, the fiber bundle 10 oscillates around the front end of the hollow guide shaft. This twists the fiber bundle 10 to generate yarn 15.

[0083] The first arm 73 is a long, narrow component with a first block 71 fixed to one end along its length. The second arm 74 is also a long, narrow component with a second block 72 fixed to one end along its length. The second arm 74 is rotatable about a support shaft 75 supporting the other end along its length. This allows the first block 71 and the second block 72 to be separated for maintenance purposes, such as cleaning. Specifically, the rotation can be achieved using a double-acting cylinder or a single-acting cylinder and an elastic component (e.g., a spring).

[0084] Furthermore, the components of the air-jet spinning device 70 (e.g., the support shaft 75) are mounted on the drafting base 41. Alternatively, the air-jet spinning device 70 can be mounted on the drafting base 41 via other relay components. Therefore, the positional relationship between the drafting lower roller group 42 and the air-jet spinning device 70 is less prone to change. As a result, the quality of the generated yarn 15 is less prone to variation.

[0085] Furthermore, the support shaft 75 is not limited to being a shaft that serves as the center of rotation; it can be any shaft used to support the air-jet spinning device 70. Alternatively, a structure that allows the second block 72 to move linearly relative to the first block 71 can be used instead of a structure that allows the second block 72 to rotate. Or, the first block 71 and the second block 72 of the air-jet spinning device 70 can be a structure in which they are not open or closed.

[0086] Next, we will explain the relationship between the motor layout and the support when viewed in the direction of the roller axis.

[0087] As described above, the stretching base 41 is supported by two supports 3a and 3b. Figure 5 As shown, the straight line connecting the center C of support 3a and the center C of support 3b is called the imaginary line 103. Furthermore, the drafting base 41 can also be supported by three or more supports 3a and 3b. In this case, the center C used to define the imaginary line 103 can, for example, be the center C of the two supports 3a and 3b that primarily support the weight of the drafting base 41, or the center C of the supports 3a and 3b at one end and the other end in the fiber travel direction. Additionally, in Figure 5 In the diagram (viewed along the roller axis), the area is divided into a first region and a second region, with imaginary line 103 as the boundary. In this embodiment, the region where the lower drafting roller assembly 42 is configured is the second region.

[0088] The center C of supports 3a and 3b refers to the point at the center of the cross-sectional shape of supports 3a and 3b. The center C can be any point that can be understood as the center. For example, the center C can be determined as follows: In this embodiment, the cross-sectional shape of supports 3a and 3b is obtained by removing a portion of a rectangle (specifically, a square). In this case, for example, the intersection of the diagonals of the rectangle is the center C. The centroid can also be used instead of the intersection of the diagonals. Furthermore, if the cross-sectional shape is circular or annular, the center of the circle can be used as the center C.

[0089] like Figure 5 As shown, the rotation centers of the first motor 45a and the second motor 45b are located in the first region. The rotation centers of the third motor 45c and the fourth motor 45d are located in the second region.

[0090] Here, with all motors configured together in the first region, the fiber bundle processing assembly 40 is directed towards... Figure 5 The lower part of the fiber bundle processing assembly 40 protrudes significantly, thus increasing its size. On the other hand, with all motors arranged together in the second region, the distance from the supports 3a, 3b to the lower drafting roller assembly 42 becomes longer. This results in increased vibration of the lower drafting roller assembly 42. In contrast, by distributing the motors between the first and second regions as in this embodiment, the size of the fiber bundle processing assembly 40 can be reduced while shortening the distance from the supports 3a, 3b to the lower drafting roller assembly 42, thereby mitigating vibration of the lower drafting roller assembly 42.

[0091] Furthermore, in the lower drafting roller assembly 42, the downstream front lower roller 42a is driven to rotate at the highest speed, the middle lower roller 42b is driven to rotate at the second highest speed, the third lower roller 42c is driven to rotate at the third highest speed, and the rear lower roller 42d is driven to rotate at the lowest speed. Considering this, the first motor 45a is a DC brushless motor with excellent control at high speeds, while the second motor 45b, third motor 45c, and fourth motor 45d are stepper motors. Also, for the same reason, the first motor 45a tends to be larger in size, while the fourth motor 45d tends to be smaller in size. In this regard, by arranging the smaller third motor 45c and fourth motor 45d in the second region, the distance from the supports 3a and 3b to the lower drafting roller assembly 42 can be shortened, reducing vibration of the lower drafting roller assembly 42. Furthermore, the type of motor in this embodiment is only one example and can be changed. For example, the first motor 45a could also be a stepper motor, and the second motor 45b could also be a DC brushless motor.

[0092] In this embodiment, the first motor 45a and the second motor 45b are arranged along the fiber travel direction. Furthermore, the third motor 45c and the fourth motor 45d are also arranged along the fiber travel direction. Additionally, when viewed in the roller axis direction, the direction orthogonal to the fiber travel direction ( Figure 5 The direction in which the fiber bundle processing assembly 40 travels vertically is referred to as the third direction. By arranging the motors along the fiber travel direction, the size of the third direction of the fiber bundle processing assembly 40 can be miniaturized. Furthermore, the arrangement of the two components along the fiber travel direction means that the two components overlap when viewed in the fiber travel direction (the same applies in other directions). The second motor 45b and the third motor 45c are also arranged along the third direction. Therefore, the size of the fiber bundle processing assembly 40 in the fiber travel direction can also be miniaturized.

[0093] Furthermore, the first motor 45a and the second motor 45b are arranged in the first region, and the third motor 45c and the fourth motor 45d are arranged in the second region, thereby forming a space between the first motor 45a and the second motor 45b and the front lower roller 42a. The air-jet spinning device 70 is arranged using this space. Therefore, in the fiber travel direction, the support shaft 75 of the air-jet spinning device 70 is arranged between the rotation center of the first motor 45a and the rotation center of the second motor 45b. Furthermore, a space is also formed between the first motor 45a and the air-jet spinning device 70, thus allowing the second block 72 and the second arm 74 of the air-jet spinning device 70 to move using this space.

[0094] Next, refer to Figure 5 The positional relationship and characteristics of each motor in the vertical direction are explained.

[0095] like Figure 5 As shown, if the motors are arranged in order from the lower side in the vertical direction to the upper side in the vertical direction, they become the first motor 45a, the second motor 45b, the third motor 45c, and the fourth motor 45d.

[0096] Furthermore, as described above, if the motors are arranged in order of being driven from high speed to low speed, the order becomes first motor 45a, second motor 45b, third motor 45c, and fourth motor 45d, consistent with the vertical arrangement. Additionally, the motor with the highest maximum rotational speed is used for the highest-speed driving. Therefore, the order of the motors is also from highest to lowest maximum rotational speed. Thus, in this embodiment, in the height direction of the spinning machine 1, the first motor 45a, with the highest maximum rotational speed, is positioned at the bottom, and the fourth motor 45d, with the lowest maximum rotational speed, is positioned at the top.

[0097] Furthermore, the higher the driving speed, the higher the (rated) power consumption. Therefore, if the motors are arranged in order of decreasing power consumption, they become the first motor 45a, the second motor 45b, the third motor 45c, and the fourth motor 45d, consistent with the vertical arrangement. Therefore, in this embodiment, in the height direction of the spinning machine 1, the first motor 45a, which consumes the most power, is located at the bottom, and the fourth motor 45d, which consumes the least power, is located at the top.

[0098] Furthermore, as described above, the first motor 45a is a DC brushless motor, and the second motor 45b, the third motor 45c, and the fourth motor 45d are stepper motors. Therefore, in this embodiment, in the height direction of the spinning machine 1, the first motor 45a, which is a DC brushless motor, is located at the bottom, and the fourth motor 45d, which is a stepper motor, is located at the top.

[0099] By arranging the motors in this way, large or heavy motors can be positioned below, thus enabling a stable configuration of the fiber bundle processing assembly 40.

[0100] Furthermore, the closer the largest, heaviest, and fastest rotating first motor 45a is to the support column 3a, the greater the reduction in vibration transmitted to the lower drafting roller assembly 42. In this embodiment, the distance from the support column 3a to the first motor 45a is shorter than the distance from the support column 3a to the second motor 45b, shorter than the distance from the support column 3a to the third motor 45c, and shorter than the distance from the support column 3a to the fourth motor 45d. This reduces the vibration transmitted to the lower drafting roller assembly 42.

[0101] As described above, the fiber bundle processing assembly 40 of this embodiment includes a lower drawing roller assembly 42, a drive unit 45, and a drawing base 41. The lower drawing roller assembly 42, together with the upper drawing roller assembly 60, clamps the fiber bundle 10 to elongate it. The drive unit 45 includes multiple motors that drive the lower drawing roller assembly 42. The drawing base 41 supports the lower drawing roller assembly 42 and the drive unit 45, and is supported by two pillars 3a and 3b. The lower drawing roller assembly 42 includes a front lower roller 42a, a middle lower roller 42b, and a rear lower roller 42d arranged sequentially from downstream to upstream in the fiber travel direction. When viewed in the roller axis direction of the lower drawing roller assembly 42, the rotation center of at least one of the first motor 45a driving the front lower roller 42a and the second motor 45b driving the middle lower roller 42b is located in a first region bounded by an imaginary line 103 passing through the center C of the two pillars 3a and 3b. The rotation center of the fourth motor 45d driving the lower rear roller 42d (or the third motor 45c driving the third lower roller 42c) is located in the second region bounded by the imaginary line 103. This is feature 1.

[0102] When all motors are arranged together in a first or second region bounded by the imaginary line 103, the motors are located significantly outward relative to the imaginary line 103, thus increasing the size of the fiber bundle processing assembly 40. In this embodiment, the motors can be distributed across the first and second regions, thereby enabling a miniaturization of the fiber bundle processing assembly 40.

[0103] In the fiber bundle processing assembly 40 of this embodiment, the area where the lower drafting roller group 42 is configured is the second region when viewed in the roller axis direction. This is feature 2.

[0104] Therefore, a smaller motor that drives the lower rear roller 42d can be positioned in the second region. As a result, the distance between the lower drafting roller assembly 42 and the supports 3a and 3b is shortened, thus reducing the vibration of the lower drafting roller assembly 42.

[0105] In the fiber bundle processing assembly 40 of this embodiment, the drawing lower roller group 42 further includes a third lower roller 42c, which is disposed between the middle lower roller 42b and the rear lower roller 42d. The drive unit 45 includes a first motor 45a, a second motor 45b, a third motor 45c, and a fourth motor 45d as multiple motors. The first motor 45a drives the front lower roller 42a. The second motor 45b drives the middle lower roller 42b. The third motor 45c drives the third lower roller 42c. The fourth motor 45d drives the rear lower roller 42d. The rotation center of the first motor 45a and the rotation center of the second motor 45b are located in a first region bounded by the imaginary line 103. The rotation centers of the third motor 45c and the fourth motor 45d are located in a second region bounded by the imaginary line 103. This is feature 3.

[0106] Thus, the four motors can be distributed and arranged in the first and second regions, thereby enabling further miniaturization of the fiber bundle processing assembly 40.

[0107] In the fiber bundle processing assembly 40 of this embodiment, when viewed in the roller axis direction, the first motor 45a and the second motor 45b are arranged along the fiber travel direction. The third motor 45c and the fourth motor 45d are arranged along the fiber travel direction. The second motor 45b and the third motor 45c are arranged in a direction orthogonal to the fiber travel direction. This is feature 4.

[0108] Therefore, in the fiber travel direction, the position of the second motor 45b overlaps with the position of the third motor 45c, thus enabling the fiber bundle processing assembly 40 to be miniaturized in the fiber travel direction.

[0109] In the fiber bundle processing assembly 40 of this embodiment, the first motor 45a driving the front lower roller 42a is a DC brushless motor. The motor driving at least one of the middle lower roller 42b and the rear lower roller 42d is a stepper motor. This is feature 5.

[0110] Because the front lower roller 42a rotates at high speed, the rotation of the front lower roller 42a can be stably controlled by using a DC brushless motor as the motor to drive the front lower roller 42a.

[0111] The fiber bundle processing assembly 40 of this embodiment includes an air-jet spinning device 70, which is mounted directly or via a component on the drafting base 41. The air-jet spinning device 70 uses a swirling airflow to spin the fiber bundle 10 supplied from the drafting lower roller group 42 to generate yarn 15. This is feature 6.

[0112] Thus, the drafting lower roller group 42 and the air-jet spinning device 70 are supported by a common component (i.e., drafting base 41), thereby improving the accuracy of the positional relationship between the drafting lower roller group 42 and the air-jet spinning device 70.

[0113] In the fiber bundle processing assembly 40 of this embodiment, the drive unit 45 includes at least a first motor 45a and a second motor 45b as multiple motors. The first motor 45a drives the front lower roller 42a, and the second motor 45b drives the middle lower roller 42b. When viewed in the roller axis direction, the support shaft 75 of the air-jet spinning device 70 is arranged between the rotation center of the first motor 45a and the rotation center of the second motor 45b in the fiber travel direction. This is feature 7.

[0114] Therefore, the support shaft 75 of the air-jet spinning device 70 can be configured using the space between the first motor 45a and the second motor 45b, so that even when the fiber bundle processing assembly 40 is equipped with the air-jet spinning device 70, the size of the fiber bundle processing assembly 40 can be miniaturized.

[0115] In the fiber bundle processing assembly 40 of this embodiment, the drive unit 45 includes at least a first motor 45a as a plurality of motors, which drives the front lower roller 42a. At least a portion of the air-jet spinning device 70 is movable. A space is formed between the first motor 45a and the air-jet spinning device 70 for moving at least a portion of the air-jet spinning device 70. This is feature 8.

[0116] Therefore, at least a portion of the air-jet spinning device 70 can be moved using the space between the first motor 45a and the air-jet spinning device 70.

[0117] In the fiber bundle processing assembly 40 of this embodiment, at least one of the front lower roller 42a, the middle lower roller 42b, and the rear lower roller 42d is supported by a single arm in the roller axis direction. The area supported by a single arm relative to the fiber travel path 101 is referred to as the support region. The central position of at least one of the first housing 46a of the first motor 45a driving the front lower roller 42a and the second housing 46b of the second motor 45b driving the middle lower roller 42b in the roller axis direction is located in the support region. This is feature 9.

[0118] Therefore, at least one of the first motor 45a and the second motor 45b can be configured near the support area, so the motor is not easily located outside the roller axis direction, and the size of the fiber bundle processing assembly 40 in the roller axis direction can be miniaturized.

[0119] In the fiber bundle processing assembly 40 of this embodiment, two lower drawing roller groups 42 are arranged along the roller axis direction. The support regions of the two lower drawing roller groups 42 are opposite each other. This is feature 10.

[0120] Therefore, the support areas of the two lower drawing roller groups 42 can be arranged close to each other, thus simplifying the support structure.

[0121] The fiber bundle processing apparatus 5 of this embodiment includes a fiber bundle processing assembly 40, a drafting upper roller assembly 60, and a drafting cradle 61. The drafting cradle 61 supports the drafting upper roller assembly 60. This is feature 11.

[0122] The spinning machine 1 of this embodiment includes a fiber bundle treatment device 5, a yarn retention device 7, and a winding section 8. The yarn retention device 7 draws yarn 15 out from the fiber bundle treatment device 5. The winding section 8 winds the yarn 15 to form a package 18. This is feature 12.

[0123] Based on the above, a fiber bundle processing device 5 or a spinning machine 1 can be miniaturized.

[0124] In the spinning machine 1 of this embodiment, the cross-sectional shape of the supports 3a and 3b is any one of the following: circular, polygonal, a shape obtained by removing a portion of a circle, or a shape obtained by removing a portion of a polygon. This is feature 13.

[0125] Therefore, the simple shapes of the pillars 3a and 3b reduce manufacturing costs.

[0126] The fiber bundle processing assembly 40 of this embodiment includes a lower drawing roller group 42 and a drive unit 45. The lower drawing roller group 42 includes a plurality of lower drawing rollers, which, together with the upper drawing roller group 60, clamp the fiber bundle 10 to elongate it. The drive unit 45 includes at least three motors (first motor 45a, second motor 45b, third motor 45c, and fourth motor 45d) arranged for each lower drawing roller, and drives the lower drawing rollers individually. The motor with the highest maximum rotational speed (first motor 45a) is arranged at the bottom, and the motor with the lowest maximum rotational speed (fourth motor 45d) is arranged at the top. This is feature 14.

[0127] The fiber bundle processing assembly 40 of this embodiment includes a lower drawing roller group 42 and a drive unit 45. The lower drawing roller group 42 includes a plurality of lower drawing rollers, which, together with the upper drawing roller group 60, clamp the fiber bundle 10 to elongate it. The drive unit 45 includes at least three motors (first motor 45a, second motor 45b, third motor 45c, and fourth motor 45d) arranged for each lower drawing roller, and drives the lower drawing rollers individually. The motor with the highest power consumption (first motor 45a) is arranged at the bottom, and the motor with the lowest power consumption (fourth motor 45d) is arranged at the top. This is feature 15.

[0128] The fiber bundle processing assembly 40 of this embodiment includes a lower drawing roller group 42 and a drive unit 45. The lower drawing roller group 42 includes a plurality of lower drawing rollers, which, together with the upper drawing roller group 60, clamp the fiber bundle 10 to elongate it. The drive unit 45 includes at least three motors (first motor 45a, second motor 45b, third motor 45c, and fourth motor 45d) arranged for each lower drawing roller, and drives the lower drawing rollers individually. The three motors include the first motor 45a and the fourth motor 45d. The first motor 45a is a DC brushless motor, and the fourth motor 45d is a stepper motor. The DC brushless motor is positioned below the stepper motor. This is feature 16.

[0129] Based on the above, a relatively heavy motor can be positioned at the bottom, thus enabling the fiber bundle processing assembly 40 to operate stably.

[0130] For the features 1 to 16 mentioned above, they can be appropriately combined as long as no contradictions are generated. For example, at least one of features 1 to N-1 can be appropriately combined in feature N (N = 1, 2, ..., 16).

[0131] The preferred embodiments of the present invention have been described above, but the above structure can be modified, for example, as follows.

[0132] In the above embodiment, the yarn retention device 7 draws out the yarn 15 generated by the air-jet spinning device 70. Alternatively, the yarn 15 generated by the air-jet spinning device 70 can be drawn out by the delivery roller pair (drawing device). In this case, the yarn retention device 7 and / or a mechanical compensator can be arranged downstream of the delivery roller pair.

[0133] In the above embodiments, the front lower roller 42a and the middle lower roller 42b are driven to rotate by individual motors, but they can also be driven to rotate by a common motor. In the above embodiments, the third lower roller 42c and the rear lower roller 42d are driven to rotate by individual motors, but they can also be driven to rotate by a common motor.

[0134] In the above embodiment, there are four lower drafting rollers constituting the lower drafting roller group 42, but the third lower roller 42c can be omitted. Along with this, the third motor 45c, the third drive pulley 50c, the third driven pulley 51c, and the third belt 52c can also be omitted.

[0135] In the above embodiment, the yarn end is drawn from the package 18 by the suction nozzle 33 to capture and guide it to the yarn receiving device 31. However, a suction device may also be provided between the yarn holding device 7 and the yarn receiving device 31, so that the winding of the package 18 is interrupted after the yarn 15 is cut, while the yarn 15 on the package 18 side is attracted and captured by the suction device.

[0136] In the above embodiment, a splicer is used as the yarn splicing device 31. However, the yarn 15 from the package 18 may be reversed at least to the air-jet spinning device 70, and the drafting of the fiber bundle 10 performed by the fiber bundle treatment device 5 and the spinning performed by the air-jet spinning device 70 may be restarted, thereby splicing the yarn 15 between the fiber bundle treatment device 5 and the package 18 in a manner that makes the yarn 15 continuous again.

[0137] In the above embodiment, the spinning machine 1 has a yarn receiving carriage 30, but each spinning unit 2 may also have at least a part of the yarn receiving related device, or the yarn receiving carriage 30 may be omitted.

[0138] In the spinning machine 1, each device is arranged in the height direction of the machine platform such that the yarn 15 supplied from the upper side is wound on the lower side. However, each device may also be arranged such that the yarn supplied from the lower side is wound on the upper side.

Claims

1. A fiber bundle processing assembly, characterized in that, have: The lower drafting roller assembly, together with the upper drafting roller assembly, clamps the fiber bundle to elongate it; The drive unit includes multiple motors that drive the lower drafting roller assembly; and The drawing base supports the lower drawing roller assembly and the drive unit, and is supported by two pillars. The drafting lower roller assembly includes a front lower roller, a middle lower roller, and a rear lower roller arranged sequentially from downstream to upstream in the fiber travel direction. When viewed in the direction of the roller axis of the lower drawing roller assembly. The rotation center of the motor driving at least one of the front lower roller and the middle lower roller is located in a first region bounded by an imaginary line passing through the center of each of the two pillars. The rotation center of the motor driving the rear lower roller is located in the second region bounded by the imaginary line. The output axes of the plurality of motors protrude away from the direction of fiber travel. The plurality of motors are arranged along the direction of fiber travel.

2. The fiber bundle processing assembly according to claim 1, characterized in that, When viewed in the direction of the roller axis, the area where the lower roller assembly is configured is the second region.

3. The fiber bundle processing assembly according to claim 1, characterized in that, The drafting lower roller assembly also includes a third lower roller, which is disposed between the middle lower roller and the rear lower roller. The drive unit includes a first motor, a second motor, a third motor, and a fourth motor as the plurality of motors. The first motor drives the front lower roller. The second motor drives the lower roller. The third motor drives the third lower roller. The fourth motor drives the rear lower roller. The rotation centers of the first motor and the second motor are located in the first region bounded by the imaginary line. The rotation centers of the third motor and the fourth motor are located in the second region bounded by the imaginary line.

4. The fiber bundle processing assembly according to claim 2, characterized in that, The drafting lower roller assembly also includes a third lower roller, which is disposed between the middle lower roller and the rear lower roller. The drive unit includes a first motor, a second motor, a third motor, and a fourth motor as the plurality of motors. The first motor drives the front lower roller. The second motor drives the lower roller. The third motor drives the third lower roller. The fourth motor drives the rear lower roller. The rotation centers of the first motor and the second motor are located in the first region bounded by the imaginary line. The rotation centers of the third motor and the fourth motor are located in the second region bounded by the imaginary line.

5. The fiber bundle processing assembly according to claim 3, characterized in that, When viewed in the direction of the roller axis The first motor and the second motor are arranged along the fiber travel direction. The third motor and the fourth motor are arranged along the fiber travel direction. The second motor and the third motor are arranged in a direction orthogonal to the fiber travel direction.

6. The fiber bundle processing assembly according to claim 4, characterized in that, When viewed in the direction of the roller axis The first motor and the second motor are arranged along the fiber travel direction. The third motor and the fourth motor are arranged along the fiber travel direction. The second motor and the third motor are arranged in a direction orthogonal to the fiber travel direction.

7. The fiber bundle processing assembly according to any one of claims 1 to 6, characterized in that, The motor driving the front lower roller is a DC brushless motor. The motor driving at least one of the middle lower roller and the rear lower roller is a stepper motor.

8. The fiber bundle processing assembly according to any one of claims 1 to 6, characterized in that, have: An air-jet spinning device, directly or via components, is mounted on the drafting base and uses swirling airflow to spin a fiber bundle supplied from the drafting lower roller assembly to generate yarn.

9. The fiber bundle processing assembly according to claim 7, characterized in that, have: An air-jet spinning device, directly or via components, is mounted on the drafting base and uses swirling airflow to spin a fiber bundle supplied from the drafting lower roller assembly to generate yarn.

10. The fiber bundle processing assembly according to claim 8, The drive unit includes at least a first motor and a second motor as part of the plurality of motors. The first motor drives the front lower roller. The second motor drives the lower roller. When viewed in the direction of the roller axis, the support shaft of the air-jet spinning device is arranged between the rotation center of the first motor and the rotation center of the second motor in the fiber travel direction.

11. The fiber bundle processing assembly according to claim 9, The drive unit includes at least a first motor and a second motor as part of the plurality of motors. The first motor drives the front lower roller. The second motor drives the lower roller. When viewed in the direction of the roller axis, the support shaft of the air-jet spinning device is arranged between the rotation center of the first motor and the rotation center of the second motor in the fiber travel direction.

12. The fiber bundle processing assembly according to claim 8, characterized in that, The drive unit includes at least a first motor as one of the plurality of motors, and the first motor drives the front lower roller. At least a portion of the air-jet spinning device is movable. A space is formed between the first motor and the air-jet spinning device for moving at least a portion of the air-jet spinning device.

13. The fiber bundle processing assembly according to claim 9, characterized in that, The drive unit includes at least a first motor as one of the plurality of motors, and the first motor drives the front lower roller. At least a portion of the air-jet spinning device is movable. A space is formed between the first motor and the air-jet spinning device for moving at least a portion of the air-jet spinning device.

14. The fiber bundle processing assembly according to claim 10, characterized in that, The drive unit includes at least a first motor as one of the plurality of motors, and the first motor drives the front lower roller. At least a portion of the air-jet spinning device is movable. A space is formed between the first motor and the air-jet spinning device for moving at least a portion of the air-jet spinning device.

15. The fiber bundle processing assembly according to claim 11, characterized in that, The drive unit includes at least a first motor as one of the plurality of motors, and the first motor drives the front lower roller. At least a portion of the air-jet spinning device is movable. A space is formed between the first motor and the air-jet spinning device for moving at least a portion of the air-jet spinning device.

16. The fiber bundle processing assembly according to claim 12, characterized in that, At least one of the front lower roller, the middle lower roller, and the rear lower roller is supported by a single arm in the direction of the roller axis. The area supported by a single arm relative to the fiber travel path is called the support area. The central position of the housing of the motor driving at least one of the front lower roller and the middle lower roller in the roller axis direction is located in the support area.

17. The fiber bundle processing assembly according to claim 13, characterized in that, At least one of the front lower roller, the middle lower roller, and the rear lower roller is supported by a single arm in the direction of the roller axis. The area supported by a single arm relative to the fiber travel path is called the support area. The central position of the housing of the motor driving at least one of the front lower roller and the middle lower roller in the roller axis direction is located in the support area.

18. The fiber bundle processing assembly according to claim 14, characterized in that, At least one of the front lower roller, the middle lower roller, and the rear lower roller is supported by a single arm in the direction of the roller axis. The area supported by a single arm relative to the fiber travel path is called the support area. The central position of the housing of the motor driving at least one of the front lower roller and the middle lower roller in the roller axis direction is located in the support area.

19. The fiber bundle processing assembly according to claim 15, characterized in that, At least one of the front lower roller, the middle lower roller, and the rear lower roller is supported by a single arm in the direction of the roller axis. The area supported by a single arm relative to the fiber travel path is called the support area. The central position of the housing of the motor driving at least one of the front lower roller and the middle lower roller in the roller axis direction is located in the support area.

20. The fiber bundle processing assembly according to any one of claims 1 to 6, characterized in that, The drawing lower roller assembly consists of two units arranged along the roller axis. At least one of the front lower roller, middle lower roller, and rear lower roller in the drafting lower roller assembly is supported by a single arm in the roller axis direction. The area supported by a single arm relative to the fiber travel path is called the support area. The support regions of the two lower drawing roller assemblies are opposite each other.

21. The fiber bundle processing assembly according to claim 7, characterized in that, The drawing lower roller assembly consists of two units arranged along the roller axis. At least one of the front lower roller, middle lower roller, and rear lower roller in the drafting lower roller assembly is supported by a single arm in the roller axis direction. The area supported by a single arm relative to the fiber travel path is called the support area. The support regions of the two lower drawing roller assemblies are opposite each other.

22. The fiber bundle processing assembly according to claim 8, characterized in that, The drawing lower roller assembly consists of two units arranged along the roller axis. At least one of the front lower roller, middle lower roller, and rear lower roller in the drafting lower roller assembly is supported by a single arm in the roller axis direction. The area supported by a single arm relative to the fiber travel path is called the support area. The support regions of the two lower drawing roller assemblies are opposite each other.

23. The fiber bundle processing assembly according to claim 9, characterized in that, The drawing lower roller assembly consists of two units arranged along the roller axis. At least one of the front lower roller, middle lower roller, and rear lower roller in the drafting lower roller assembly is supported by a single arm in the roller axis direction. The area supported by a single arm relative to the fiber travel path is called the support area. The support regions of the two lower drawing roller assemblies are opposite each other.

24. The fiber bundle processing assembly according to claim 10, characterized in that, The drawing lower roller assembly consists of two units arranged along the roller axis. At least one of the front lower roller, middle lower roller, and rear lower roller in the drafting lower roller assembly is supported by a single arm in the roller axis direction. The area supported by a single arm relative to the fiber travel path is called the support area. The support regions of the two lower drawing roller assemblies are opposite each other.

25. The fiber bundle processing assembly according to claim 11, characterized in that, The drawing lower roller assembly consists of two units arranged along the roller axis. At least one of the front lower roller, middle lower roller, and rear lower roller in the drafting lower roller assembly is supported by a single arm in the roller axis direction. The area supported by a single arm relative to the fiber travel path is called the support area. The support regions of the two lower drawing roller assemblies are opposite each other.

26. The fiber bundle processing assembly according to claim 12, characterized in that, The drawing lower roller assembly consists of two units arranged along the roller axis. At least one of the front lower roller, middle lower roller, and rear lower roller in the drafting lower roller assembly is supported by a single arm in the roller axis direction. The area supported by a single arm relative to the fiber travel path is called the support area. The support regions of the two lower drawing roller assemblies are opposite each other.

27. The fiber bundle processing assembly according to claim 13, characterized in that, The drawing lower roller assembly consists of two units arranged along the roller axis. At least one of the front lower roller, middle lower roller, and rear lower roller in the drafting lower roller assembly is supported by a single arm in the roller axis direction. The area supported by a single arm relative to the fiber travel path is called the support area. The support regions of the two lower drawing roller assemblies are opposite each other.

28. The fiber bundle processing assembly according to claim 14, characterized in that, The drawing lower roller assembly consists of two units arranged along the roller axis. At least one of the front lower roller, middle lower roller, and rear lower roller in the drafting lower roller assembly is supported by a single arm in the roller axis direction. The area supported by a single arm relative to the fiber travel path is called the support area. The support regions of the two lower drawing roller assemblies are opposite each other.

29. The fiber bundle processing assembly according to claim 15, characterized in that, The drawing lower roller assembly consists of two units arranged along the roller axis. At least one of the front lower roller, middle lower roller, and rear lower roller in the drafting lower roller assembly is supported by a single arm in the roller axis direction. The area supported by a single arm relative to the fiber travel path is called the support area. The support regions of the two lower drawing roller assemblies are opposite each other.

30. The fiber bundle processing assembly according to claim 16, characterized in that, The drawing lower roller assembly consists of two units arranged along the roller axis. At least one of the front lower roller, middle lower roller, and rear lower roller in the drafting lower roller assembly is supported by a single arm in the roller axis direction. The area supported by a single arm relative to the fiber travel path is called the support area. The support regions of the two lower drawing roller assemblies are opposite each other.

31. The fiber bundle processing assembly according to claim 17, characterized in that, The drawing lower roller assembly consists of two units arranged along the roller axis. At least one of the front lower roller, middle lower roller, and rear lower roller in the drafting lower roller assembly is supported by a single arm in the roller axis direction. The area supported by a single arm relative to the fiber travel path is called the support area. The support regions of the two lower drawing roller assemblies are opposite each other.

32. The fiber bundle processing assembly according to claim 18, characterized in that, The drawing lower roller assembly consists of two units arranged along the roller axis. At least one of the front lower roller, middle lower roller, and rear lower roller in the drafting lower roller assembly is supported by a single arm in the roller axis direction. The area supported by a single arm relative to the fiber travel path is called the support area. The support regions of the two lower drawing roller assemblies are opposite each other.

33. The fiber bundle processing assembly according to claim 19, characterized in that, The drawing lower roller assembly consists of two units arranged along the roller axis. At least one of the front lower roller, middle lower roller, and rear lower roller in the drafting lower roller assembly is supported by a single arm in the roller axis direction. The area supported by a single arm relative to the fiber travel path is called the support area. The support regions of the two lower drawing roller assemblies are opposite each other.

34. A fiber bundle processing device, characterized in that, have: The fiber bundle processing assembly according to any one of claims 1 to 33; The drawing upper roller assembly; and The drafting cradle supports the upper drafting roller assembly.

35. A spinning machine, characterized in that, have: The fiber bundle processing apparatus according to claim 34; The yarn extraction device draws the yarn out of the fiber bundle processing device; and A winding device that winds yarn to form a package.

36. The spinning machine according to claim 35, characterized in that, The cross-sectional shape of the support column is any one of the following: circular, polygonal, a shape obtained by removing a portion of a circle, or a shape obtained by removing a portion of a polygon.

37. A fiber bundle processing assembly, characterized in that, have: The drafting lower roller assembly, comprising multiple drafting lower rollers, together with the drafting upper roller assembly, clamps the fiber bundle to elongate it; and The drive unit includes at least three motors, one for each of the lower drafting rollers, which individually drive the lower drafting rollers. Of the three motors, the one with the highest maximum rotational speed is positioned at the bottom, and the one with the lowest maximum rotational speed is positioned at the top. The output axes of the at least three motors protrude away from the direction of fiber travel. The at least three motors are arranged along the direction of fiber travel.

38. A fiber bundle processing assembly, characterized in that, have: The drafting lower roller assembly, comprising multiple drafting lower rollers, together with the drafting upper roller assembly, clamps the fiber bundle to elongate it; and The drive unit includes at least three motors, one for each of the lower drafting rollers, which individually drive the lower drafting rollers. The motor with the highest power consumption among the three motors is positioned at the bottom, and the motor with the lowest power consumption is positioned at the top. The output axes of the at least three motors protrude away from the direction of fiber travel. The at least three motors are arranged along the direction of fiber travel.

39. A fiber bundle processing assembly, characterized in that, have: The drafting lower roller assembly, comprising multiple drafting lower rollers, together with the drafting upper roller assembly, clamps the fiber bundle to elongate it; and The drive unit includes at least three motors, one for each of the lower drafting rollers, which individually drive the lower drafting rollers. The three motors include a DC brushless motor and a stepper motor. The DC brushless motor is positioned below the stepper motor. The output axes of the at least three motors protrude away from the direction of fiber travel. The at least three motors are arranged along the direction of fiber travel.

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