Traverse device

Abstract

To provide a traverse device capable of carrying out accurate traverse control and preventing interference between rotary vanes adjacent in a direction in which a plurality of traverse units are arrayed and damages to the device.SOLUTION: A traverse device 1 comprises a drive motor 11, a toothed transmission belt 12 and a plurality of traverse units 13. Each traverse unit 13 has a traverse guide 17, rotary vanes (18, 19) for traversing a yarn 101 by rotating reverse to each other, a drive-force transmission shaft 22 for transmitting a drive force to the rotary vanes (18, 19) and an interference-avoidance cam 21. The interference-avoidance cams 21 adjacent in an arraying direction Y of the traverse units 13 rotate without abutment in a state the drive-force transmission shafts 22 adjacent in the arraying direction Y are at the same rotational speed. If rotational speed deviates between the drive-force transmission shafts 22, the interference-avoidance cams 21 abut against each other to regulate the deviation in rotational speed between the drive-force transmission shafts 22 and avoid the interference between the rotary vanes (18, 19) adjacent in the arraying direction Y.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a traverse device including a plurality of traverse units that traverse a yarn wound as a package, wherein the plurality of traverse units are arranged side by side.

Background Art

[0002] As a traverse device including a plurality of traverse units that traverse a yarn wound as a package, the plurality of traverse units being arranged side by side, one disclosed in Patent Document 1 is known. The traverse device disclosed in Patent Document 1 includes a plurality of traverse units (traversing devices 2) arranged side by side. Each of the plurality of traverse units has a traverse guide (guide plate 9) and a pair of rotating blades (blades 7, 8). A traverse path, which is the path along which the yarn is traversed, is guided by the traverse guide. The pair of rotating blades rotate in opposite directions to each other to traverse the yarn along the traverse guide, and are configured to transfer the yarn at both end sides of the traverse path.

[0003] In the traverse device described in Patent Document 1, driving force is transmitted to each of the multiple traverse units using a worm gear or a toothed transmission belt. Specifically, in a configuration using a worm gear, a worm gear consisting of worms 18, 20 and worm wheels 17, 19 is disclosed to synchronously rotate the rotors 12, 13 of each traverse unit, and the rotors 12, 13 rotate the blades 7, 8. Because the rotors 12, 13 of each traverse unit are synchronously rotated by the worm gear, the blades 7, 8 of each traverse unit driven by the rotors 12, 13 also rotate synchronously. Furthermore, Patent Document 1 discloses a configuration using a toothed transmission belt, specifically in which driving force is transmitted from tangential belts 45, 46 configured as toothed transmission belts to the rotors 12, 13 of each traverse unit via belt pulleys 43, 44 configured as toothed pulleys, thereby driving the rotors 12, 13 of each traverse unit to rotate in a synchronous manner. Since the rotors 12, 13 of each traverse unit are driven to rotate in a synchronous manner by the driving force from the toothed transmission belt, the blades 7, 8 of each traverse unit driven by the rotors 12, 13 also rotate in a synchronous manner.

[0004] In the traverse device of Patent Document 1, whether using a worm gear or a toothed transmission belt, the rotating blades (blades 7, 8) of multiple traverse units rotate synchronously. Therefore, in the traverse device of Patent Document 1, even if the rotating blades of adjacent traverse units are positioned close together in the direction in which they are lined up, interference between them can be prevented. That is, even if the rotational trajectories of adjacent rotating blades in the above-mentioned direction of alignment are positioned close together so that they partially overlap, interference between adjacent rotating blades in the above-mentioned direction of alignment can be prevented. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Special Publication No. 3-72544 [Overview of the project] [Problems that the invention aims to solve]

[0006] In the traverse device described in Patent Document 1, when a worm gear is used, the worm and worm wheel are always meshed, so the rotating blades of multiple traverse units are always maintained in a synchronized rotation state. This prevents interference between adjacent rotating blades in the direction of arrangement of multiple traverse units, which can damage the traverse device. However, due to the worm gear configuration, it is difficult to eliminate the play between the worm and worm wheel, and there is a problem in that it is difficult to perform high-precision traverse control to make a thread traverse by rotating a pair of rotating blades in opposite directions. On the other hand, in the traverse device described in Patent Document 1, when a toothed transmission belt is used, the problem of play between the worm and worm wheel does not occur, so high-precision traverse control can be performed. However, in the configuration using a toothed transmission belt, there is a risk of the toothed transmission belt breaking, and if the toothed transmission belt breaks, the synchronized rotation of the rotating blades of multiple traverse units will be impaired. If the toothed transmission belt breaks and the synchronous rotation of the rotor blades is impaired, adjacent rotor blades in the direction of alignment of the multiple traverse units will interfere with each other, causing damage to the traverse device.

[0007] The present invention has been made in view of the above circumstances, and aims to provide a traverse device that can perform highly accurate traverse control and effectively prevent interference between adjacent rotating blades in the direction in which multiple traverse units are aligned, thereby preventing damage to the device. [Means for solving the problem]

[0008] (1) The traverse device of the present invention is A traverse device comprising multiple traverse units for winding yarn as a package, wherein multiple such traverse units are arranged in a row, The system further comprises a drive motor and a toothed transmission belt that is driven by the drive motor and transmits synchronized driving force to a plurality of traverse units, Each of the multiple traverse units is A traverse guide guides the traverse path, which is the path the thread takes as it moves back and forth in a crisscross pattern, A pair of rotating blades rotate in opposite directions to traverse the thread along the traverse guide and to transfer the thread at both ends of the traverse path, A drive force transmission shaft is driven by the driving force transmitted from the toothed transmission belt and transmits the driving force to the rotating blades, An interference avoidance cam is provided on the drive force transmission shaft to avoid interference between the rotating blades which are arranged adjacent to each other in the direction in which the multiple traverse units are aligned, It has, In the multiple traverse units, the rotating blades that are adjacent to each other in the direction of alignment and rotate in opposite directions are arranged along the same plane. In the multiple traverse units, the interference avoidance cams adjacent to each other in the alignment direction are: When the rotational speeds of adjacent drive force transmission shafts in the aforementioned alignment direction are the same, adjacent interference avoidance cams in the aforementioned alignment direction rotate together with the drive force transmission shafts without contacting each other. If a discrepancy occurs in the rotational speed of adjacent drive force transmission shafts in the aforementioned alignment direction, the interference avoidance cams adjacent to each other in the aforementioned alignment direction come into contact with each other, thereby restricting the discrepancy in rotational speed between the drive force transmission shafts and preventing interference between adjacent rotating blades in the aforementioned alignment direction. It is characterized by the following:

[0009] According to the traverse device described in (1) above, a toothed transmission belt transmits synchronous driving force to multiple traverse units, eliminating the need for a gear mechanism to transmit driving force between multiple traverse units. Therefore, problems such as backlash, which occur in configurations that transmit driving force between multiple traverse units using a worm gear, do not occur, and traverse control that causes a pair of rotating blades to rotate in opposite directions to create a traverse swing can be performed with high precision. Furthermore, since problems such as backlash, which occur in configurations that transmit driving force between multiple traverse units using a worm gear, do not occur, noise can be suppressed. In addition, according to the above traverse device, in a normal operating state where the rotational speeds of adjacent driving force transmission shafts in the direction in which the multiple traverse units are aligned are the same, the interference avoidance cams provided on adjacent driving force transmission shafts do not come into contact with each other, and the driving force transmission shafts rotate without contact, maintaining a normal operating state in which adjacent rotating blades rotate synchronously. On the other hand, if the toothed transmission belt is damaged in the traverse device, a discrepancy will occur in the rotational speeds of adjacent driving force transmission shafts in the direction in which the multiple traverse units are aligned. However, with the traverse device described above, when there is a difference in the rotational speed of adjacent drive force transmission shafts, the interference avoidance cams provided on adjacent drive force transmission shafts come into contact with each other, restricting the difference in rotational speed between adjacent drive force transmission shafts and preventing interference between adjacent rotating blades. Therefore, the traverse device described above enables highly accurate traverse control and suppresses noise, and furthermore, it effectively prevents interference between adjacent rotating blades in the direction in which multiple traverse units are aligned, thereby preventing damage to the device.

[0010] (2) The traverse device of the present invention is A traverse device comprising multiple traverse units for winding yarn as a package, wherein multiple such traverse units are arranged in a row, Each of the multiple traverse units is A traverse guide guides the traverse path, which is the path the thread takes as it moves back and forth in a crisscross pattern, A pair of rotating blades rotate in opposite directions to traverse the thread along the traverse guide and to transfer the thread at both ends of the traverse path, The drive motor and A drive force transmission shaft that is driven by the drive force transmitted from the drive motor and transmits the drive force to the rotating blade, An interference avoidance cam is provided on the drive force transmission shaft to avoid interference between the rotating blades which are arranged adjacent to each other in the direction in which the multiple traverse units are aligned, It has, In the multiple traverse units, the rotating blades that are adjacent to each other in the direction of alignment and rotate in opposite directions are arranged along the same plane. In the multiple traverse units, the interference avoidance cams adjacent to each other in the alignment direction are: When the rotational speeds of adjacent drive force transmission shafts in the aforementioned alignment direction are the same, adjacent interference avoidance cams in the aforementioned alignment direction rotate together with the drive force transmission shafts without contacting each other. If a discrepancy occurs in the rotational speed of adjacent drive force transmission shafts in the aforementioned alignment direction, the interference avoidance cams adjacent to each other in the aforementioned alignment direction come into contact with each other, thereby restricting the discrepancy in rotational speed between the drive force transmission shafts and preventing interference between adjacent rotating blades in the aforementioned alignment direction. The system further includes a control unit that controls the drive motors provided in each of the multiple traverse units to rotate at the same rotational speed. It is characterized by the following:

[0011] According to the traverse device described in (2) above, the rotating blades of each traverse unit are rotated via a drive force transmission shaft by a drive motor individually provided for each traverse unit. Therefore, a gear mechanism for transmitting drive force between multiple traverse units is unnecessary. As a result, problems such as backlash, which occur in configurations that use worm gears to transmit drive force between multiple traverse units, do not occur, and traverse control that causes the thread to traverse by rotating a pair of rotating blades in opposite directions can be performed with high precision. Furthermore, since problems such as backlash, which occur in configurations that use worm gears to transmit drive force between multiple traverse units, do not occur, noise can be suppressed. In addition, the drive motors of multiple traverse units are controlled by the control unit to rotate at the same rotational speed, so that the rotating blades of multiple traverse units rotate in sync. Furthermore, with the above-described traverse device, in a normal operating state where the rotational speeds of adjacent drive force transmission shafts in the direction of arrangement of multiple traverse units are the same, the interference avoidance cams provided on adjacent drive force transmission shafts do not come into contact with each other, and the drive force transmission shafts rotate without contact, maintaining a normal operating state in which adjacent rotating blades rotate in sync. On the other hand, if a drive motor failure occurs in any of the multiple traverse units of the traverse device, a difference in rotational speed will occur in adjacent drive force transmission shafts in the direction of arrangement of multiple traverse units. However, with the above-described traverse device, when a difference in rotational speed occurs in adjacent drive force transmission shafts, the interference avoidance cams provided on adjacent drive force transmission shafts come into contact with each other, restricting the difference in rotational speed between adjacent drive force transmission shafts and preventing interference between adjacent rotating blades. Therefore, the above-described traverse device enables highly accurate traverse control and suppresses noise. Furthermore, it effectively prevents interference between adjacent rotating blades in the direction in which multiple traverse units are aligned, thereby preventing damage to the device.

[0012] (3) In the traverse device of the present invention, The interference avoidance cam has a plurality of protrusions that project radially along the radial direction with respect to the drive force transmission shaft, When there is a deviation between the rotational speeds of the adjacent driving force transmission shafts in the arrangement direction, the protrusions of the interference avoidance cams that are adjacent in the arrangement direction come into contact with each other to regulate the deviation between the rotational speeds of the driving force transmission shafts, characterized in that

[0013] According to the traverse device described in (3) above, a plurality of radially protruding protrusions in the radial direction of the driving force transmission shaft are provided on the interference avoidance cam. When a deviation occurs between the rotational speeds of adjacent driving force transmission shafts, the protrusions come into contact with each other, and the deviation between the rotational speeds of adjacent driving force transmission shafts is regulated. Therefore, an interference avoidance cam can be constructed in which the structure for regulating the deviation between the rotational speeds of adjacent driving force transmission shafts is arranged with high space efficiency along the circumferential direction of the driving force transmission shaft. Accordingly, the interference avoidance cam can be made compact, and the structure can be further simplified.

[0014] (4) In the traverse device of the present invention, the plurality of protrusions are provided along the outer circumference of the interference avoidance cam, and are arranged at equal angular intervals in the circumferential direction of the interference avoidance cam, characterized in that

[0015] According to the traverse device described in (4) above, the protrusions that regulate the deviation between the rotational speeds of adjacent driving force transmission shafts are arranged at equal angular intervals in the circumferential direction of the interference avoidance cam. Therefore, the amount of rotational speed deviation regulated between adjacent driving force transmission shafts can be accurately controlled.

[0016] The traverse device according to the present invention is not required to include all of the configurations described in (1) or (2) above, and the configurations described in (3) and (4) above. For example, in the invention related to the traverse device described in (1) or (2) above, a traverse device that does not include the configuration described in (3) above, or the configurations described in (3) and (4) above, can be regarded as the traverse device of the present invention. Further, a traverse device including the configuration of (1) or (2) above and the configuration of (3) above can also be regarded as the traverse device of the present invention. Further, a traverse device including the configuration of (1) or (2) above and the configurations of (3) and (4) above can also be regarded as the traverse device of the present invention. Effects of the Invention

[0017] According to the present invention, it is possible to provide a traverse device that can perform high-precision traverse control, suitably prevent adjacent rotating blades from interfering with each other in the direction in which a plurality of traverse units are arranged, and prevent damage to the device. Brief Description of the Drawings

[0018] [Figure 1] It is a perspective view showing the overall configuration of a yarn winding machine provided with a traverse device. [Figure 2] It is a perspective view showing the traverse device according to the first embodiment of the present invention. [Figure 3] It is a plan view of the traverse device shown in Fig. 2. [Figure 4] It is a side view of the traverse device shown in Fig. 2. [Figure 5] It is a bottom view of a traverse unit in the traverse device. [Figure 6] It is a diagram schematically showing the configuration for transmitting driving force in the traverse unit of the traverse device shown in Fig. 2. [Figure 7] It is a diagram showing the arrangement state of a pair of rotating blades respectively provided in a plurality of traverse units. [Figure 8]This is a perspective view showing a traverse device according to a second embodiment of the present invention. [Figure 9] Figure 7 is a plan view of the traverse device. [Figure 10] Figure 7 is a side view of the traverse device. [Figure 11] This figure schematically shows the configuration for transmitting driving force in the traverse unit of the traverse device shown in Figure 7. [Figure 12] Figure 7 is a schematic diagram of the control configuration of the traverse device. [Figure 13] This is a perspective view showing a modified traverse device, specifically a part of the traverse device. [Figure 14] Figure 13 is a plan view of the traverse device, showing a part of the traverse device. [Modes for carrying out the invention]

[0019] The embodiments for carrying out the present invention will be described below with reference to the drawings. The present invention comprises a plurality of traverse units for winding yarn as a package, and as a traverse device in which a plurality of traverse units are arranged in a row, it can be widely applied to various uses.

[0020] The traverse device of the embodiment of the present invention is provided in a textile machine such as a yarn winder that winds yarn spun from a spinning machine. Figure 1 is a perspective view showing the overall configuration of a yarn winder 100 equipped with a traverse device. In the following description, first, the yarn winder 100 will be described as an example of a textile machine equipped with a traverse device, and then the traverse device 1 according to the first embodiment of the present invention (see Figure 2) and the traverse device 2 according to the second embodiment of the present invention (see Figure 8) will be described. In the following description, the vertical, horizontal, and left-right directions of the yarn winder 100 and the traverse devices (1, 2) provided in the yarn winder 100 will be defined as shown by arrows in Figure 1 and Figures 2 to 10 described later.

[0021] [Thread winding machine] Referring to Figure 1, the yarn winder 100, which is equipped with either a traverse device 1 or a traverse device 2, is configured as a textile machine for winding multiple yarns 101 spun from a spinning machine (not shown) into multiple packages 102. The yarn winder 100 is composed of a base frame 103, a main frame 104 supported on the base frame 103, a disc-shaped turret plate 105 supported on the main frame 104, two bobbin holders (106a, 106b) supported on the turret plate 105, a lifting frame 107 supported on the main frame 104, and the like.

[0022] The turret plate 105 is disc-shaped and configured to rotate around a horizontal axis relative to the main frame 104. Each of the two bobbin holders (106a, 106b) is supported at one end by the turret plate 105 and extends cantilevered to the left side of the turret plate 105. The bobbin holders (106a, 106b) are rotationally driven by a drive motor (not shown) located on the right side of the turret plate 105.

[0023] Furthermore, each of the two bobbin holders (106a, 106b) supported by the turret plate 105 has multiple bobbins (108a, 108b) mounted on it. That is, one bobbin holder 106a has multiple bobbins 108a mounted on it, and the other bobbin holder 106b has multiple bobbins 108b mounted on it. The multiple bobbins 108a are mounted on the bobbin holder 106a in a series arrangement along the longitudinal direction of the cantilevered bobbin holder 106a. The multiple bobbins 108b are mounted on the bobbin holder 106b in a series arrangement along the longitudinal direction of the cantilevered bobbin holder 106b.

[0024] Furthermore, the turret plate 105 is configured to rotate in 180° increments around a horizontal axis. Then, the package 102 is formed by winding the thread 101 onto the bobbin 108a of one bobbin holder 106a, which is located in the upper winding position. In Figure 1, one bobbin holder 106a is located in the upper winding position, where the thread 101 is wound as the package 102, and the other bobbin holder 106b is located in the lower standby position. When the package 102 formed by winding the thread 101 onto the multiple bobbins 108a of one bobbin holder 106a is fully wound, the turret plate 105 rotates 180°, and the other bobbin holder 106b is newly positioned in the winding position. Then, the thread 101 is wound onto the multiple bobbins 108b of the other bobbin holder 106b, which is now in the winding position, and the package 102 is formed.

[0025] The lifting frame 107, supported by the main frame 104, is provided to be able to move up and down relative to the main frame 104. The lifting frame 107 is equipped with a traverse device (1, 2) according to the first or second embodiment of the present invention, which will be described later. The traverse device (1, 2) equipped on the lifting frame 107 is provided with a plurality of traverse units (13, 30), which will be described later, for traversing the yarn 101 that will be wound as a package 102. The lifting frame 107 is also provided with a plurality of contact rollers 109. The plurality of contact rollers 109 are arranged side by side along the left-right direction on the lifting frame 107 and are each supported so as to be rotatable.

[0026] In the lifting frame 107, each of the multiple traverse units (13, 30) in the traverse devices (1, 2) and each of the multiple contact rollers 109 are arranged correspondingly in the vertical direction. The cover 107a of the lifting frame 107 is provided with multiple guide grooves 107b into which the thread 101 is inserted. The thread 101 is inserted into each of the multiple guide grooves 107b from top to bottom. The thread 101 inserted into each of the multiple guide grooves 107b is fed downward while being traversed by each of the multiple traverse units (13, 30) in the traverse devices (1, 2) equipped on the lifting frame 107. Then, the yarn 101, which is traversed downward by each of the multiple traverse units (13, 30), comes into contact with a part of the circumferential surface of the contact roller 109 and is guided to the bobbins (108a, 108b) located below the contact roller 109, where it is wound onto the bobbins (108a, 108b) to form the package 102. In this way, the yarn 101 is traversed downward by the traverse units (13, 30) in the traverse device (1, 2) equipped on the lifting frame 107 and wound up as the package 102.

[0027] The traverse device 1 according to the first embodiment of the present invention and the traverse device 2 according to the second embodiment of the present invention are provided in the yarn winding machine 100 described above. The traverse devices (1 and 2) according to the first and second embodiments of the present invention will be described below.

[0028] [First Embodiment] (Overview of the traverse device) Figure 2 is a perspective view showing a traverse device 1 according to the first embodiment of the present invention. Figure 3 is a plan view of the traverse device 1. Figure 4 is a side view of the traverse device 1. Referring to Figures 1 to 4, the traverse device 1 is provided in a yarn winding machine 100 and is mounted on the lifting frame 107 of the yarn winding machine 100. The traverse device 1 comprises a plurality of traverse units 13 that traverse the yarn 101 to be wound as a package 102, and the plurality of traverse units 13 are arranged in series along the left-right direction. In addition to the plurality of traverse units 13, the traverse device 1 is also composed of a drive motor 11 and a toothed transmission belt 12. The plurality of traverse units 13, the drive motor 11 and the toothed transmission belt 12 are built into the lifting frame 107. The plurality of traverse units 13 and the drive motor 11 are supported by the lifting frame 107 within the lifting frame 107.

[0029] Referring to Figures 2 to 4, the drive motor 11 is provided as an electric motor and is configured as a drive source that generates driving force to drive the multiple traverse units 13. The toothed transmission belt 12 is driven by the drive motor 11 and is provided as a power transmission belt for transmitting synchronized driving force to the multiple traverse units 13. The toothed transmission belt 12 is provided as an endless power transmission belt that is driven circumferentially by the drive motor 11, and teeth are provided on both the inner and outer surfaces. Note that the teeth provided on the toothed transmission belt 12 are not shown in the drawings.

[0030] The drive motor 11 is provided with a drive pulley 11a fixed to the end of its output shaft. Each of the multiple traverse units 13 is provided with a driven pulley 15. The driven pulleys 15 are located on the upper side of each traverse unit 13. Both the drive pulley 11a and the multiple driven pulleys 15 provided on each of the multiple traverse units 13 are toothed pulleys, and teeth are provided on their outer circumference. Note that the teeth on the drive pulley 11a and the driven pulleys 15 are not shown in the drawings. The toothed transmission belt 12 is wrapped around the drive pulley 11a and the multiple driven pulleys 15. The toothed transmission belt 12 is wrapped around the drive pulley 11a and the multiple driven pulleys 15 in a manner in which the teeth mesh with each other. In order to maintain proper belt tension, the toothed transmission belt 12 is also wrapped around an intermediate pulley 14 between the drive pulley 11a and the multiple driven pulleys 15.

[0031] When the drive motor 11 rotates the drive pulley 11a, the rotation of the drive pulley 11a is transmitted to the multiple driven pulleys 15 via the toothed transmission belt 12. The multiple driven pulleys 15, each provided on the multiple traverse units 13, are configured as pulleys with the same diameter and the same number of teeth, and rotate at the same rotational speed when driven by the toothed transmission belt 12. As a result, synchronized driving force is transmitted from the toothed transmission belt 12 to the multiple driven pulleys 15. In other words, synchronized driving force is transmitted from the toothed transmission belt 12 to the multiple traverse units 13.

[0032] Furthermore, the toothed transmission belt 12 is wrapped around multiple driven pulleys 15, each provided on the upper surface of multiple traverse units 13 arranged in series along the left-right direction, alternating between wrapping around the front and rear sides. In other words, the inner and outer circumferences of the toothed transmission belt 12 are alternately wrapped around the multiple driven pulleys 15 arranged in series along the left-right direction. For this reason, adjacent driven pulleys 15 in the left-right direction are configured to rotate in opposite directions. That is, a driven pulley placed next to a driven pulley 15 that rotates clockwise when viewed from above will rotate counterclockwise when viewed from above.

[0033] (Traverse Unit) Figure 5 is a bottom view of one traverse unit 13 in the traverse device 1. Figure 6 is a schematic diagram showing the configuration for transmitting driving force in the traverse unit 13 of the traverse device 1. Referring to Figures 2 to 6, the traverse device 1 is provided with a plurality of traverse units 13 that traverse the yarn 101 wound as a package 102, and the plurality of traverse units 13 are arranged in series in the left-right direction. Each of the plurality of traverse units 13 has a driven pulley 15, a housing 16, a traverse guide 17, a pair of rotating blades (18, 19), a driving force transmission mechanism 20, and an interference avoidance cam 21.

[0034] The driven pulley 15 is located on the upper side of the housing 16 and is configured as a pulley to which the driving force transmitted from the drive motor 11 to the traverse unit 13 via the toothed transmission belt 12 is input. The driven pulley 15 is rotatably supported on the upper side of the housing 16. The housing 16 houses the drive force transmission mechanism 20. On the lower side of the housing 16, a pair of rotating blades (18, 19) are rotatably supported on the housing 16. In Figure 6, the traverse unit 13 is shown schematically, with the housing 16 not shown. Also in Figure 6, the cross-sections of the power transmission path in the drive force transmission mechanism 20 are shown at different cross-sectional positions from a certain point in the power transmission path. More specifically, in Figure 6, the cross-section on the driven pulley 15 side of the power transmission path in the drive force transmission mechanism 20 is shown along the front-to-back direction, while the cross-section on the pair of rotating blades (18, 19) side of the power transmission path in the drive force transmission mechanism 20 is shown along the left-to-right direction.

[0035] Referring to Figures 2 to 5, the traverse guide 17 is provided as a guide member that guides the traverse trajectory, which is the path along which the thread 101 is traversed as it reciprocates. In this embodiment, the traverse guide 17 is provided in the housing 16. The thread 101 is traversed by a pair of rotating vanes (18, 19) described later. The traverse guide 17 is configured to guide the traverse trajectory, which is the path along which the thread 101, traversed by the pair of rotating vanes (18, 19), is traversed as it reciprocates. Note that in Figures 3, 5, and 6, the illustration of the thread 101 whose traverse trajectory is guided by the traverse guide 17 is omitted. The traverse guide 17 is provided as the front end of the housing 16 and is configured to have an edge that extends in an arc shape along the horizontal plane. More specifically, the traverse guide 17 is configured to have an edge that extends in an arc shape, gently curving forward along the left-right direction and protruding from the front end of the housing 16. As the thread 101 is traversed back and forth by the pair of rotating blades (18, 19), the thread 101 is traversed back and forth while sliding against the arc-shaped edge of the traverse guide 17 that extends along the horizontal plane. This guides the traverse path of the thread 101.

[0036] Figure 7 shows the arrangement of a pair of rotating blades (18, 19) provided on each of the multiple traverse units 13. Note that Figure 7 shows the pair of rotating blades (18, 19) viewed from below, and schematically shows only the pair of rotating blades (18, 19) provided on each of the multiple traverse units 13. Referring to Figures 2 to 7, the pair of rotating blades (18, 19) rotate in opposite directions to traverse the thread 101 along the traverse guide 17, and are configured to transfer the thread 101 at both ends of the traverse trajectory.

[0037] A pair of rotating blades (18, 19) are provided on each traverse unit 13 and are supported below the housing 16 so as to be rotatable around a vertical axis. The pair of rotating blades (18, 19) are rotationally driven around the vertical axis by the driving force transmitted from the driven pulley 15 via a driving force transmission mechanism 20 housed in the housing 16 (described later), and are configured to rotate in opposite directions to each other. The rotating blades 18 and 19 are arranged side by side in the vertical direction, with the rotating blade 18 positioned below and the rotating blade 19 positioned above. The rotating blades 18 and 19 are configured to rotate in opposite directions to each other when rotationally driven by the driving force transmission mechanism 20 (described later). Referring to Figure 5, for example, if the rotating blade 18 rotates clockwise when viewed from below, the rotating blade 19 is configured to rotate counterclockwise when viewed from below. In Figure 5, the rotation direction of the rotating blade 18, which rotates clockwise when viewed from below, is indicated by arrow X1, and the rotation direction of the rotating blade 19, which rotates counterclockwise when viewed from below, is indicated by arrow X2. Also, as mentioned above, adjacent driven pulleys 15 in the left-right direction where multiple traverse units 13 are lined up rotate in opposite directions to each other. Therefore, the same applies to the rotating blades 18 and 19, which are rotationally driven by the driving force transmitted from the driven pulleys 15 via the driving force transmission mechanism 20 described later. That is, adjacent rotating blades 18 in the direction where multiple traverse units 13 are lined up rotate in opposite directions to each other. Similarly, adjacent rotating blades 19 in the direction where multiple traverse units 13 are lined up also rotate in opposite directions to each other.

[0038] Furthermore, the rotating blades 18 and 19 are each provided with three blades (18a, 19a). More specifically, the rotating blade 18 is provided with three blades 18a arranged at equal angular intervals in the circumferential direction and extending radially along the radial direction. The rotating blade 19 is provided with three blades 19a arranged at equal angular intervals in the circumferential direction and extending radially along the radial direction. The three blades 18a of the rotating blade 18 are arranged to extend radially along the horizontal plane. The three blades 19a of the rotating blade 19 are also arranged to extend radially along the horizontal plane.

[0039] Furthermore, in multiple traverse units 13, adjacent rotating vanes (18, 19) in the alignment direction Y, which is the direction in which the multiple traverse units 13 are aligned, are arranged along the same plane that extends parallel to the horizontal plane. In each traverse unit 13, the rotating vanes 18 and 19 are arranged vertically. Adjacent rotating vanes 18 in the alignment direction Y rotate in opposite directions and are arranged along a plane parallel to the horizontal plane, and adjacent rotating vanes 19 in the alignment direction Y also rotate in opposite directions and are arranged along another plane parallel to the horizontal plane. In other words, in multiple traverse units 13, adjacent rotating vanes 18 in the alignment direction Y that rotate in opposite directions are arranged along one identical plane that extends horizontally. Similarly, adjacent rotating vanes 19 in multiple traverse units 13 that rotate in opposite directions in the alignment direction Y are also arranged along another identical plane that extends horizontally. In this embodiment, the alignment direction Y, which is the direction in which the multiple traverse units 13 are aligned, is parallel to the left-right direction and is indicated by the dashed line with arrows Y at both ends in Figures 3 and 7.

[0040] Furthermore, in multiple traverse units 13, adjacent rotating blades 18 in the alignment direction Y are arranged in close proximity so that the rotational trajectories of the rotating blades 18 overlap on a plane parallel to the horizontal plane. That is, the rotational trajectories, which are the regions through which the blades 18a of the rotating blades 18 pass, are set to overlap for adjacent rotating blades 18 in the alignment direction Y. Since the rotational trajectories of adjacent rotating blades 18 in the alignment direction Y overlap, one rotating blade 18 will enter the rotational trajectory of the other adjacent rotating blade 18 in the alignment direction Y. Therefore, adjacent rotating blades 18 in the alignment direction Y are configured to rotate in opposite directions with an angle difference set so that they do not interfere with each other. Similarly, in multiple traverse units 13, adjacent rotating blades 19 in the alignment direction Y are arranged in close proximity so that the rotational trajectories of the rotating blades 19 overlap on a plane parallel to the horizontal plane. In other words, the rotational trajectory, which is the region through which the blades 19a of the rotating blade 19 pass, is set to overlap between adjacent rotating blades 19 in the alignment direction Y. Since the rotational trajectories of adjacent rotating blades 19 in the alignment direction Y overlap, one rotating blade 19 will enter the rotational trajectory of the other adjacent rotating blade 19 in the alignment direction Y. Therefore, adjacent rotating blades 19 in the alignment direction Y are configured to rotate in opposite directions with an angle difference set so that they do not interfere with each other. As mentioned above, the rotating blade 19 rotates in the opposite direction to the rotating blade 18 of the same traverse unit 13, and also rotates in the opposite direction to the rotating blade 19 of adjacent traverse units 13 in the alignment direction Y. For example, in a traverse unit 13 adjacent to a traverse unit 13 in the alignment direction Y, where the rotating blade 18 rotates clockwise when viewed from below and the rotating blade 19 rotates counterclockwise when viewed from below, the rotating blade 18 rotates counterclockwise when viewed from below and the rotating blade 19 rotates clockwise when viewed from below.

[0041] Furthermore, in each traverse unit 13, the rotation center of the rotating blade 18, which rotates around a vertical axis, and the rotation center of the rotating blade 19, which similarly rotates around a vertical axis, are set to be eccentric with respect to each other. In this embodiment, the rotation centers of the rotating blade 18 and the rotation centers of the rotating blade 19 are set to be eccentric in the left-right direction along the traverse trajectory in which the thread 101 is guided and traversed by the traverse guide 17.

[0042] When the thread 101 is traversed back and forth along the traverse path by a pair of rotating blades (18, 19) while being guided by the traverse guide 17, the thread 101 is passed between the pair of rotating blades (18, 19) at both ends of the traverse path.

[0043] When the thread 101 is transferred from the rotating blade 18 to the rotating blade 19, first, the thread 101 is looped around the tip of one of the blades 18a of the rotating blade 18 and held by the blade 18a of the rotating blade 18. Guided by the traverse guide 17, it moves along the traverse trajectory to one end of the traverse trajectory as the rotating blade 18 rotates. Then, as the thread 101 moves to one end of the traverse trajectory together with the blade 18a of the rotating blade 18, the tip of the blade 18a of the rotating blade 18 that was holding the thread 101 is positioned slightly inside the traverse guide 17, and the thread 101 detaches from the tip of the blade 18a of the rotating blade 18. At this time, the thread 101 detaches from the tip of the blade 18a of the rotating blade 18, and simultaneously, the tip of one blade 19a of the rotating blade 19, which rotates in the opposite direction to the rotating blade 18, enters the traverse trajectory. The thread 101 that detached from the blade 18a of the rotating blade 18 then becomes caught on the blade 19a of the rotating blade 19 that entered the traverse trajectory and is held by the blade 19a of the rotating blade 19. As a result, the thread 101 is transferred from the rotating blade 18 to the rotating blade 19 at one end of the traverse trajectory.

[0044] When the thread 101 is passed from the rotating blade 18 to the rotating blade 19, the thread 101 is looped around the tip of one of the blades 19a of the rotating blade 19 and held by the blade 19a of the rotating blade 19. Guided by the traverse guide 17, the thread 101 moves along the traverse path to the other end of the traverse path as the rotating blade 19 rotates. As the thread 101 moves to the other end of the traverse path together with the blade 19a of the rotating blade 19, the tip of the blade 19a of the rotating blade 19 that was holding the thread 101 is positioned slightly inside the traverse guide 17, and the thread 101 detaches from the tip of the blade 19a of the rotating blade 19. At this time, the thread 101 detaches from the tip of the blade 19a of the rotating blade 19, and simultaneously, the tip of one blade 18a of the rotating blade 18, which rotates in the opposite direction to the rotating blade 19, enters the traverse trajectory. The thread 101 that detached from the blade 19a of the rotating blade 19 then becomes caught on the blade 18a of the rotating blade 18 that entered the traverse trajectory and is held by the blade 18a of the rotating blade 18. As a result, the thread 101 is transferred from the rotating blade 19 to the rotating blade 18 at the other end of the traverse trajectory.

[0045] As described above, the pair of rotating blades (18, 19) are configured to rotate in opposite directions to traverse the thread 101 along the traverse guide 17, and to transfer the thread 101 at both ends of the traverse path.

[0046] Referring to Figure 6, in each traverse unit 13, the drive force transmission mechanism 20 is provided as a mechanism for transmitting the drive force transmitted from the toothed transmission belt 12 to the driven pulley 15 to the rotating blades (18, 19). The drive force transmission mechanism 20 is provided with a first drive force transmission shaft 22, a second drive force transmission shaft 23, and a third drive force transmission shaft 24, which are driven by the drive force transmitted from the toothed transmission belt 12 and for transmitting the drive force to the rotating blades (18, 19).

[0047] The first drive force transmission shaft 22 is provided as a solid rotating shaft that rotates with its axis in the vertical direction, and a driven pulley 15 is fixed to its upper end. When the driven pulley 15 is rotationally driven by the toothed transmission belt 12, the first drive force transmission shaft 22 also rotates together with the driven pulley 15. In addition, gears 25 and 26 are provided on the lower half of the first drive force transmission shaft 22, arranged vertically. Both gears 25 and 26 are fixed to the first drive force transmission shaft 22, with gear 25 positioned on the upper side and gear 26 on the lower side. Gear 25 is provided as a gear for transmitting driving force to the rotating blade 18 side, and gear 26 is provided as a gear for transmitting driving force to the rotating blade 19 side.

[0048] The second drive force transmission shaft 23 is provided as a solid rotating shaft that rotates with its axis in the vertical direction, and a rotating blade 18 is fixed to its lower end. A gear 27 is provided on the upper end of the second drive force transmission shaft 23. The gear 27 is fixed to the second drive force transmission shaft 23. The gear 27 is configured to receive drive force from a gear 25 provided on the first drive force transmission shaft 22 via an intermediate gear 28. That is, the gear 25 on the first drive force transmission shaft 22 side and the intermediate gear 28 mesh, and the intermediate gear 28 meshes with the gear 27 on the second drive force transmission shaft 23 side. When the gear 25 rotates together with the first drive force transmission shaft 22, the intermediate gear 28 that meshes with the gear 25 rotates in the opposite direction to the gear 25, and furthermore, the gear 27 that meshes with the intermediate gear 28 rotates together with the second drive force transmission shaft 23 in the opposite direction to the intermediate gear 28. Therefore, gear 25 and gear 27 rotate in the same direction, and the first drive force transmission shaft 22 and the second drive force transmission shaft 23 rotate in the same direction. The rotating blade 18 rotates together with the second drive force transmission shaft 23. As a result, the rotating blade 18 rotates in the same direction as the driven pulley 15.

[0049] The third drive force transmission shaft 24 is provided as a cylindrical hollow shaft that rotates with its axis in the vertical direction, and the rotating blades 19 are fixed to its lower end. That is, the rotating blades 19 are fixed to the outer circumference of the lower end of the third drive force transmission shaft 24, which is a cylindrical hollow shaft. The second drive force transmission shaft 23 is positioned to pass through the inside of the cylindrical third drive force transmission shaft 24. The rotation center of the second drive force transmission shaft 23, which is the rotation center of the rotating blades 18, and the rotation center of the cylindrical third drive force transmission shaft 24, which is the rotation center of the rotating blades 19, are set to be eccentric to each other. A gear 29 is provided on the upper end of the third drive force transmission shaft 24. The gear 29 is fixed to the outer circumference of the upper end of the cylindrical third drive force transmission shaft 24. The gear 29 meshes with a gear 26 provided on the first drive force transmission shaft 22, and is configured to transmit drive force from the gear 26. As the gear 26 rotates with the first drive force transmission shaft 22, the gear 29 that meshes with the gear 26 rotates in the opposite direction to the gear 26 with the third drive force transmission shaft 24. Therefore, the first drive force transmission shaft 22 and the third drive force transmission shaft 24 rotate in opposite directions. Then, the rotating blade 19 rotates with the third drive force transmission shaft 24. As a result, the rotating blade 19 rotates in the opposite direction to the driven pulley 15.

[0050] As described above, the drive force transmission mechanism 20 is provided with a first drive force transmission shaft 22, a second drive force transmission shaft 23, and a third drive force transmission shaft 24, which are drive force transmission shafts driven by the drive force transmitted from the toothed transmission belt 12 and for transmitting the drive force to the rotating blades (18, 19). The first drive force transmission shaft 22 rotates together with the driven pulley 15 which is rotationally driven by the toothed transmission belt 12, the second drive force transmission shaft 23 rotates together with the rotating blades 18 in the same direction, and the third drive force transmission shaft 24 rotates together with the rotating blades 19 in the opposite direction. For this reason, the rotating blades 18 and 19 are configured to rotate in opposite directions to each other. In the power transmission mechanism 20, the number of teeth on gears 25 and 27, and the number of teeth on gears 26 and 29 are set so that the rotating blades 18 and 19, which rotate in opposite directions to each other, rotate in opposite directions at the same rotational speed.

[0051] Referring to Figures 2 to 6, the interference avoidance cam 21 is provided in each traverse unit 13 and is provided as a member to avoid interference between rotating blades (18, 19) that are arranged adjacent to each other in the alignment direction Y of the multiple traverse units 13. In other words, interference avoidance cam The 21 is provided as a member to prevent interference between adjacent rotating blades 18 in the alignment direction Y, and also to prevent interference between adjacent rotating blades 19 in the alignment direction Y.

[0052] The interference avoidance cam 21 is provided in a disc shape and is driven by the driving force transmitted from the toothed transmission belt 12 and is provided on the drive force transmission shaft for transmitting the driving force to the rotating blades (18, 19). In this embodiment, the interference avoidance cam 21 is provided on the first drive force transmission shaft 22, which is the drive force transmission shaft. The interference avoidance cam 21 is fixed to the first drive force transmission shaft 22 in a state where it is positioned between the lower end of the driven pulley 15 and the upper surface of the housing 16. Furthermore, the interference avoidance cam 21 is fixed to the first drive force transmission shaft 22 in a state where the radial center position of the disc-shaped interference avoidance cam 21 coincides with the rotation center position of the first drive force transmission shaft 22. In this embodiment, since the interference avoidance cam 21 is provided on the first drive force transmission shaft 22 which is fixed to the driven pulley 15, it rotates together with the driven pulley 15. Then, just as adjacent driven pulleys 15 in the alignment direction Y rotate in opposite directions to each other, adjacent interference avoidance cams 21 in the alignment direction Y also rotate in opposite directions to each other.

[0053] The interference avoidance cam 21 may be provided on the second drive force transmission shaft 23 or the third drive force transmission shaft 24, rather than the first drive force transmission shaft 22. If the interference avoidance cam 21 is provided on the second drive force transmission shaft 23, for example, the second drive force transmission shaft 23 is provided so as to penetrate the rotating blade 18 and protrude downward from the rotating blade 18. The interference avoidance cam 21 is then attached to the lower end of the second drive force transmission shaft 23. If the interference avoidance cam 21 is provided on the third drive force transmission shaft 24, for example, the interference avoidance cam 21 is attached to the third drive force transmission shaft 24 between the lower end of the first drive force transmission shaft 22 and the upper surface of the rotating blade 19.

[0054] Furthermore, in the multiple traverse units 13, adjacent interference avoidance cams 21 in the alignment direction Y are arranged along the same plane that extends parallel to the horizontal plane. The interference avoidance cam 21 also has multiple projections 21a that protrude radially along the radial direction with respect to the first drive force transmission shaft 22. The multiple projections 21a are provided along the outer circumference of the interference avoidance cam 21 and are arranged at equal angular intervals in the circumferential direction.

[0055] Furthermore, in multiple traverse units 13, adjacent interference avoidance cams 21 in the alignment direction Y are arranged in close proximity such that the rotational trajectories of the projections 21a partially overlap on a plane parallel to the horizontal plane. That is, the rotational trajectories of the projections 21a, which are the regions through which the projections 21a of the interference avoidance cams 21 pass, are set to partially overlap between adjacent interference avoidance cams 21 in the alignment direction Y. Since the rotational trajectories of the projections 21a of adjacent interference avoidance cams 21 in the alignment direction Y overlap, the projection 21a of one of the adjacent interference avoidance cams 21 in the alignment direction Y will enter the rotational trajectory of the projection 21a of the other interference avoidance cam 21. Therefore, adjacent interference avoidance cams 21 in the alignment direction Y are configured to rotate in opposite directions with an angle difference set so that the projections 21a do not interfere with each other.

[0056] As described above, the interference avoidance cams 21 are configured to rotate in opposite directions to each other while being set to an angle difference such that adjacent interference avoidance cams 21 in the alignment direction Y do not interfere with each other. For this reason, in multiple traverse units 13, adjacent interference avoidance cams 21 in the alignment direction Y are configured to rotate together with the first drive force transmission shafts 22 without contacting each other, when the rotation speeds (magnitude of rotational speeds) of adjacent first drive force transmission shafts 22 in the alignment direction Y are the same. In other words, adjacent interference avoidance cams 21 in the alignment direction Y are configured to rotate together with the first drive force transmission shafts 22 without contacting each other, when the rotation speeds (magnitude of rotational speeds) of adjacent first drive force transmission shafts 22 in the alignment direction Y that rotate in opposite directions to each other are the same.

[0057] Furthermore, the interference avoidance cams 21 are configured such that the rotational trajectories of the projections 21a of adjacent interference avoidance cams 21 in the alignment direction Y partially overlap. Therefore, in multiple traverse units 13, if there is a difference in the rotational speed of adjacent first drive force transmission shafts 22 in the alignment direction Y, the projections 21a of adjacent interference avoidance cams 21 in the alignment direction Y will come into contact with each other, thereby restricting the difference in rotational speed between the first drive force transmission shafts 22. The interference avoidance cams 21 are configured to avoid interference between adjacent rotating blades (18, 19) in the alignment direction Y by restricting the difference in rotational speed between the first drive force transmission shafts 22 through the contact of the projections 21a. In other words, the interference avoidance cam 21 is configured such that when there is a difference in the rotational speed of adjacent first drive force transmission shafts 22 in the alignment direction Y, the protrusions 21a come into contact with each other, thereby restricting the difference in rotational speed between the first drive force transmission shafts 22, and preventing interference between adjacent rotating blades 18 in the alignment direction Y, as well as between adjacent rotating blades 19 in the alignment direction Y.

[0058] As described above, when adjacent first drive force transmission shafts 22 in the alignment direction Y have the same rotational speed, adjacent interference avoidance cams 21 in the alignment direction Y do not come into contact with each other. Therefore, under normal operating conditions of the traverse device 1, the interference avoidance cams 21 do not come into contact with each other. However, if the toothed transmission belt 12 is damaged, a difference in rotational speed will occur between adjacent first drive force transmission shafts 22 in the alignment direction Y. In this case, adjacent interference avoidance cams 21 in the alignment direction Y will come into contact with each other, and the difference in rotational speed between adjacent first drive force transmission shafts 22 in the alignment direction Y is restricted. Therefore, for the rotating blades 18 to which drive force is transmitted from the first drive force transmission shaft 22 via the second drive force transmission shaft 23, the difference in rotational speed between adjacent rotating blades 18 in the alignment direction Y is also restricted. Similarly, for the rotating blades 19 to which driving force is transmitted from the first driving force transmission shaft 22 via the third driving force transmission shaft 24, the difference in rotational speed between adjacent rotating blades 19 in the alignment direction Y is restricted. As a result, interference between adjacent rotating blades 18 in the alignment direction Y is avoided, and interference between adjacent rotating blades 19 in the alignment direction Y is also avoided.

[0059] (Effects and Benefits) According to the traverse device 1 described above, since the toothed transmission belt 12 transmits synchronous driving force to multiple traverse units 13, a gear mechanism for transmitting driving force between multiple traverse units 13 is unnecessary. Therefore, problems such as backlash, which occur in configurations that transmit driving force between multiple traverse units 13 using a worm gear, do not occur, and traverse control that causes the thread 101 to swing in a crisscross pattern by rotating a pair of rotating blades (18, 19) in opposite directions can be performed with high precision. Furthermore, since problems such as backlash, which occur in configurations that transmit driving force between multiple traverse units 13 using a worm gear, do not occur, noise can be suppressed. In addition, according to the traverse device 1 described above, in a normal operating state where the rotational speeds of adjacent first driving force transmission shafts 22 in the alignment direction Y of the multiple traverse units 13 are the same, the interference avoidance cams 21 provided on adjacent first driving force transmission shafts 22 do not come into contact with each other, the first driving force transmission shafts 22 rotate without contact, and the normal operating state in which adjacent rotating blades (18, 19) rotate synchronously is maintained. On the other hand, if the toothed transmission belt 12 in the traverse device 1 is damaged, a discrepancy will occur in the rotational speed of adjacent first drive force transmission shafts 22 in the direction Y in which the multiple traverse units 13 are aligned. However, with the traverse device 1 described above, when a discrepancy occurs in the rotational speed of adjacent first drive force transmission shafts 22, the interference avoidance cams 21 provided on adjacent first drive force transmission shafts 22 come into contact with each other, restricting the discrepancy in rotational speed between adjacent first drive force transmission shafts 22 and preventing interference between adjacent rotating blades (18, 19). Therefore, with the traverse device 1 described above, high-precision traverse control can be performed, noise can be suppressed, and furthermore, interference between adjacent rotating blades (18, 19) in the direction in which the multiple traverse units 13 are aligned can be suitably prevented, thereby preventing damage to the traverse device 1.

[0060] Furthermore, according to the traverse device 1 described above, a plurality of protrusions 21a projecting radially in the radial direction of the first drive force transmission shaft 22 are provided on the interference avoidance cam 21. When a difference in rotational speed occurs between adjacent first drive force transmission shafts 22, the protrusions 21a come into contact with each other, restricting the difference in rotational speed between adjacent first drive force transmission shafts 22. Therefore, an interference avoidance cam 21 can be constructed in which the structure for restricting the difference in rotational speed between adjacent first drive force transmission shafts 22 is space-efficiently arranged along the circumferential direction of the first drive force transmission shaft 22. Thus, the interference avoidance cam 21 can be made more compact and its structure can be further simplified.

[0061] Furthermore, according to the traverse device 1 described above, the protrusions 21a that restrict the rotational speed difference of adjacent first drive force transmission shafts 22 are arranged at equal angular intervals in the circumferential direction of the interference avoidance cam 21. Therefore, the amount of rotational speed difference restricted in adjacent first drive force transmission shafts 22 can be precisely controlled.

[0062] [Second Embodiment] Next, a second embodiment of the present invention will be described. Figure 8 is a perspective view showing a traverse device 2 according to the second embodiment of the present invention. Figure 9 is a plan view of the traverse device 2. Figure 10 is a side view of the traverse device 2. Figure 11 is a schematic diagram showing the configuration for transmitting driving force in the traverse unit 30 of the traverse device 2. Figure 12 is a block diagram illustrating the schematic control configuration of the traverse device 2. In the description of the second embodiment, redundant explanations of components similar to those in the first embodiment described above will be omitted by using the same reference numerals in the drawings or by referring to the same reference numerals.

[0063] Referring to Figures 1 and 8 to 12, the traverse device 2 is installed on the yarn winding machine 100 and mounted on the lifting frame 107 of the yarn winding machine 100. The traverse device 2 comprises multiple traverse units 30 that traverse the yarn 101 to be wound as a package 102, and the multiple traverse units 30 are arranged in series along the left-right direction. In addition to the multiple traverse units 30, the traverse device 2 is also configured with a control unit 32 that controls the drive motor 31 provided for each of the multiple traverse units 30.

[0064] Unlike the traverse device 1 of the first embodiment, the traverse device 2 of the second embodiment is configured such that the rotating blades (18, 19) of each traverse unit 30 are driven by a drive motor 31 provided in each traverse unit 30. In other words, the traverse device 2 does not have a single drive motor 11 as a drive source or a toothed transmission belt 12 to transmit the driving force from the drive motor 11. Instead, the rotating blades (18, 19) are rotated by the driving force generated by the drive motor 31 provided in each traverse unit 30.

[0065] Referring to Figures 8 to 11, each of the multiple traverse units 30 in the traverse device 2 is configured to include a drive motor 31, a housing 16, a traverse guide 17 provided on the housing 16, a pair of rotating blades (18, 19), a drive force transmission mechanism 20, and an interference avoidance cam 21. The housing 16, traverse guide 17, pair of rotating blades (18, 19), drive force transmission mechanism 20, and interference avoidance cam 21 in the traverse unit 30 are configured similarly to the housing 16, traverse guide 17, pair of rotating blades (18, 19), drive force transmission mechanism 20, and interference avoidance cam 21 in the traverse unit 13 of the first embodiment. However, the traverse unit 30 of the second embodiment differs from the traverse unit 13 of the first embodiment in that it does not have a driven pulley 15 and is provided with a drive motor 31.

[0066] Referring to Figures 8 to 11, the drive motor 31 is provided as an electric motor and is installed in each traverse unit 30. The drive motor 31 is configured, for example, as a synchronous motor. The drive motor 31 is configured as a drive source that generates a driving force to rotate a pair of rotating blades (18, 19) in opposite directions in each traverse unit 30. The drive motor 31 is positioned above the housing 16 and is arranged to generate a rotational driving force around a vertical axis.

[0067] Referring to Figure 11, the output shaft (not shown) of the drive motor 31 is connected to the first drive force transmission shaft 22 in the drive force transmission mechanism 20, and the rotation of the drive motor 31 is directly input to the first drive force transmission shaft 22. That is, the lower end of the output shaft of the drive motor 31 and the upper end of the first drive force transmission shaft 22 are coupled to each other, and the first drive force transmission shaft 22 rotates together with the rotation of the drive motor 31. Note that the output shaft of the drive motor 31 and the first drive force transmission shaft 22 are not limited to being directly connected; they may also be configured to transmit driving force through the meshing of a gear provided on the output shaft of the drive motor 31 and a gear provided on the first drive force transmission shaft 22.

[0068] When the drive motor 31 rotates, the first drive force transmission shaft 22, which is driven by the drive motor 31, rotates. As the first drive force transmission shaft 22 rotates, the drive force from the first drive force transmission shaft 22 is transmitted to the second drive force transmission shaft 23 via the meshing of gear 25, intermediate gear 28, and gear 27, causing the second drive force transmission shaft 23 to rotate in the same direction as the first drive force transmission shaft 22. The rotating blades 18 then rotate together with the second drive force transmission shaft 23 in the same direction as the first drive force transmission shaft 22. Furthermore, when the first drive force transmission shaft 22 rotates, the drive force from the first drive force transmission shaft 22 is transmitted to the third drive force transmission shaft 24 via the meshing of gear 26 and gear 27, causing the third drive force transmission shaft 24 to rotate in the opposite direction to the first drive force transmission shaft 22. The rotating blades 19 then rotate together with the third drive force transmission shaft 24 in the opposite direction to the first drive force transmission shaft 22. Therefore, when the drive motor 31 rotates, the rotating blade 18 rotates in the same direction as the first drive force transmission shaft 22 driven by the drive motor 31, while the rotating blade 19 rotates in the opposite direction. For this reason, the rotating blades 18 and 19 are configured to rotate in opposite directions to each other.

[0069] Furthermore, referring to Figures 8 to 12, the drive motors 31 provided in each of the multiple traverse units 30 are configured to have their rotation controlled by the control unit 32. In other words, the traverse device 2 is equipped with a control unit 32, and all of the multiple drive motors 31 provided in the multiple traverse units 30 are configured to have their rotation controlled by the control unit 32. The control unit 32 is configured to include, for example, a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), etc. The CPU reads a program corresponding to the processing content from the ROM, loads it into the RAM, and works in cooperation with the loaded program to centrally control the operation of each drive motor 31.

[0070] The control unit 32 is configured to control the drive motors 31 provided on each of the multiple traverse units 30 so that they rotate at the same rotational speed. Furthermore, the control unit 32 is configured to control adjacent drive motors 31 in the alignment direction Y so that they rotate in opposite directions. That is, the drive motors 31 of adjacent traverse units 30 in the alignment direction Y are configured to rotate at the same rotational speed in opposite directions based on the control of the control unit 32. For example, if the drive motor 31 of any of the multiple traverse units 30 rotates clockwise when viewed from above, the drive motors 31 adjacent to that drive motor 31 in the alignment direction Y will rotate counterclockwise when viewed from above. Then, the drive motors 31 that are adjacent to each other in the alignment direction Y and rotate clockwise when viewed from above and the drive motors 31 that rotate counterclockwise when viewed from above will rotate at the same rotational speed.

[0071] In the traverse device 2, adjacent drive motors 31 in the alignment direction Y rotate in opposite directions at the same rotational speed. Therefore, adjacent first drive force transmission shafts 22 in the alignment direction Y also rotate in opposite directions at the same rotational speed, similar to the first embodiment. The interference avoidance cams 21 provided on the first drive force transmission shafts 22 also rotate in the same way as in the first embodiment. That is, because adjacent first drive force transmission shafts 22 in the alignment direction Y rotate in opposite directions at the same rotational speed, adjacent interference avoidance cams 21 in the alignment direction Y also rotate in opposite directions at the same rotational speed. For example, if an interference avoidance cam 21 of one of the multiple traverse units 30 rotates clockwise when viewed from above, the interference avoidance cams 21 adjacent to that interference avoidance cam 21 in the alignment direction Y rotate counterclockwise when viewed from above. Furthermore, the interference avoidance cams 21 that are adjacent to each other in the alignment direction Y and rotate clockwise when viewed from above, and the interference avoidance cams 21 that rotate counterclockwise when viewed from above, rotate at the same rotational speed. In Figure 9, the rotation direction of the interference avoidance cam 21 that rotates clockwise when viewed from above is indicated by arrow R1, and the rotation direction of the interference avoidance cam 21 that rotates counterclockwise when viewed from above is indicated by arrow R2.

[0072] Furthermore, the interference avoidance cams 21 provided on each of the multiple traverse units 30 are configured in the same way as the interference avoidance cams 21 provided on each of the multiple traverse units 13 in the first embodiment. That is, the interference avoidance cams 21 of the traverse units 30 are configured to rotate in opposite directions to each other while being set to an angle difference such that adjacent interference avoidance cams 21 in the alignment direction Y do not interfere with each other. For this reason, when the rotation speeds of adjacent first drive force transmission shafts 22 in the alignment direction Y are the same, adjacent interference avoidance cams 21 in the multiple traverse units 30 are configured to rotate together with the first drive force transmission shafts 22 without contacting each other in the alignment direction Y. In addition, the interference avoidance cams 21 of the traverse units 30 are configured such that the rotation trajectories of the protrusions 21a of adjacent interference avoidance cams 21 in the alignment direction Y partially overlap. Therefore, in multiple traverse units 30, adjacent interference avoidance cams 21 in the alignment direction Y are configured such that if there is a difference in the rotational speed of adjacent first drive force transmission shafts 22 in the alignment direction Y, the protrusions 21a of adjacent interference avoidance cams 21 in the alignment direction Y come into contact with each other, thereby restricting the difference in rotational speed between the first drive force transmission shafts 22. The interference avoidance cams 21 are configured to avoid interference between adjacent rotating blades (18, 19) in the alignment direction Y by restricting the difference in rotational speed between the first drive force transmission shafts 22 through the contact of the protrusions 21a.

[0073] As described above, in the traverse device 2, when the rotational speeds of adjacent first drive force transmission shafts 22 in the alignment direction Y are the same, adjacent interference avoidance cams 21 in the alignment direction Y do not come into contact with each other. Therefore, under normal operating conditions of the traverse device 2, the interference avoidance cams 21 do not come into contact with each other. However, if the drive motor 31 fails in any of the multiple traverse units 30, a difference in rotational speed will occur between adjacent first drive force transmission shafts 22 in the alignment direction Y. In this case, adjacent interference avoidance cams 21 in the alignment direction Y will come into contact with each other, and the difference in rotational speed between adjacent first drive force transmission shafts 22 in the alignment direction Y will be restricted. Therefore, for the rotating blades 18 to which drive force is transmitted from the first drive force transmission shaft 22 via the second drive force transmission shaft 23, the difference in rotational speed between adjacent rotating blades 18 in the alignment direction Y will also be restricted. Similarly, for the rotating blades 19 to which driving force is transmitted from the first driving force transmission shaft 22 via the third driving force transmission shaft 24, the difference in rotational speed between adjacent rotating blades 19 in the alignment direction Y is restricted. As a result, interference between adjacent rotating blades 18 in the alignment direction Y is avoided, and interference between adjacent rotating blades 19 in the alignment direction Y is also avoided.

[0074] In the traverse device 2, an example was given in which the interference avoidance cam 21 is provided on the first drive force transmission shaft 22 in each traverse unit 30, but this is not required. The interference avoidance cam 21 of the traverse unit 30 may be provided on the second drive force transmission shaft 23 or the third drive force transmission shaft 24 instead of the first drive force transmission shaft 22. When the interference avoidance cam 21 is provided on the second drive force transmission shaft 23, for example, the second drive force transmission shaft 23 is provided so as to penetrate the rotating blade 18 and protrude below the rotating blade 18. The interference avoidance cam 21 is then attached to the lower end of the second drive force transmission shaft 23. When the interference avoidance cam 21 is provided on the third drive force transmission shaft 24, for example, the interference avoidance cam 21 is attached to the third drive force transmission shaft 24 between the lower end of the first drive force transmission shaft 22 and the upper surface of the rotating blade 19.

[0075] According to the traverse device 2 described above, the rotating blades (18, 19) of each traverse unit 30 are rotationally driven by a drive motor 31 individually provided in each traverse unit 30, via the first to third drive force transmission shafts (22, 23, 24). Therefore, a gear mechanism for transmitting drive force between multiple traverse units 30 is unnecessary. As a result, problems such as backlash, which occur in configurations that transmit drive force between multiple traverse units 30 using a worm gear, do not occur, and traverse control that causes the thread 101 to traverse by rotating a pair of rotating blades (18, 19) in opposite directions can be performed with high precision. Furthermore, since problems such as backlash, which occur in configurations that transmit drive force between multiple traverse units 30 using a worm gear, do not occur, noise can be suppressed. In addition, the drive motors 31 of the multiple traverse units 30 are controlled by the control unit 32 to rotate at the same rotational speed, so that the state in which the rotating blades (18, 19) of the multiple traverse units 30 rotate in synchronous order is maintained. Furthermore, according to the traverse device 2 described above, in a normal operating state where the rotational speeds of adjacent first drive force transmission shafts 22 in the direction Y of the arrangement of the multiple traverse units 30 are the same, the interference avoidance cams 21 provided on adjacent first drive force transmission shafts 22 do not come into contact with each other, the first drive force transmission shafts 22 rotate without contact, and a normal operating state in which adjacent rotating blades (18, 19) rotate synchronously is maintained. On the other hand, in the traverse device 2, if a drive motor 31 fails in any of the multiple traverse units 30, a difference will occur in the rotational speeds of adjacent first drive force transmission shafts 22 in the direction Y of the arrangement of the multiple traverse units 30. However, with the traverse device 2 described above, when there is a difference in the rotational speed of adjacent first drive force transmission shafts 22, the interference avoidance cams 21 provided on adjacent first drive force transmission shafts 22 come into contact with each other, restricting the difference in rotational speed between adjacent first drive force transmission shafts 22 and preventing interference between adjacent rotating blades (18, 19). Therefore, with the traverse device 2 described above, high-precision traverse control can be performed and noise can be suppressed. Furthermore, interference between adjacent rotating blades (18, 19) in the direction in which the multiple traverse units 30 are aligned can be suitably prevented, and damage to the traverse device 2 can be prevented.

[0076] [Differentiation] Although embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and various modifications are possible as long as they are within the scope of the claims. For example, it may be implemented with the following modifications.

[0077] (1) In the above-described embodiment, the traverse devices (1, 2) were described as being equipped in a yarn winding machine 100 that winds yarn spun from a spinning machine, but this is not required. The traverse devices (1, 2) can be applied to any textile machine equipped with a mechanism for winding yarn as a package, so the traverse devices (1, 2) may be equipped in textile machines other than the yarn winding machine 100. For example, the traverse devices (1, 2) may be equipped in a false twisting machine.

[0078] (2) In the above-described embodiment, the interference avoidance cam 21 was described as being provided in a disc shape, with a plurality of protrusions 21a that project radially along the radial direction on the outer circumference of the disc-shaped interference avoidance cam 21. However, the form of the interference avoidance cam is not limited to this. The shape of the interference avoidance cam is not limited to the shape exemplified in the above-described embodiment and may be changed. For example, an interference avoidance cam with a shape provided with a plurality of vanes that extend radially along the radial direction may be implemented.

[0079] (3) Furthermore, the shape of the interference avoidance cam does not have to be the same for each of the multiple traverse units. For example, as shown in Figures 13 and 14, an arrangement may be made in which interference avoidance cams of different shapes are alternately provided in adjacent traverse units in the alignment direction Y.

[0080] Figure 13 is a perspective view showing a modified traverse device 1A, and is a diagram showing a part of the traverse device 1A. Figure 14 is a plan view of the traverse device 1A, and is a diagram showing a part of the traverse device 1A. The modified traverse device 1A shown in Figures 13 and 14 is configured similarly to the traverse device 1 of the first embodiment, but differs from the traverse device 1 of the first embodiment in that adjacent traverse units 13 in the alignment direction Y are provided with alternatingly different shaped interference avoidance cams (33, 34). In the description of the modified traverse device 1A, redundant explanations of the same configuration as the first embodiment will be omitted by using the same reference numerals in the drawings or by referring to the same reference numerals, and only the different shapes of the interference avoidance cams (33, 34) will be described.

[0081] Referring to Figures 13 and 14, in the traverse device 1A, adjacent traverse units 13 in the alignment direction Y are provided with alternatingly differently shaped interference avoidance cams (33, 34). In the traverse device 1A, traverse units 13 equipped with interference avoidance cam 33 and traverse units 13 equipped with interference avoidance cam 34, which has a different shape from interference avoidance cam 33, are arranged alternately in the alignment direction Y. That is, in the traverse device 1A, interference avoidance cams 33 and 34, which have different shapes from each other, are arranged alternately in the alignment direction Y.

[0082] The interference avoidance cam 33 is provided in a disc shape, and a plurality of protrusions 33a project radially along the radial direction on the outer circumference of the disc-shaped interference avoidance cam 33, and are arranged at equal angular intervals in the circumferential direction of the interference avoidance cam 33. Between the protrusions 33a that project radially and are arranged at equal angular intervals in the circumferential direction on the outer circumference of the interference avoidance cam 33, there are grooves that are curved and recessed in a U shape. That is, between adjacent protrusions 33a in the circumferential direction on the outer circumference of the interference avoidance cam 33, there are grooves that are curved and recessed in a U shape.

[0083] In a traverse unit 13 adjacent to a traverse unit 13 equipped with an interference avoidance cam 33 in the direction Y, an interference avoidance cam 34 is provided, which has a different shape from the interference avoidance cam 33. The interference avoidance cam 34 is provided in a disc shape, and in the region near the outer edge of the upper surface of the disc-shaped interference avoidance cam 34, there are multiple protrusions 34a that project upward in a short cylindrical shape along the circumferential direction of the interference avoidance cam 34. The multiple protrusions 34a that project upward in a cylindrical shape near the outer edge of the upper surface of the disc-shaped interference avoidance cam 34 are arranged at equal angular intervals in the circumferential direction on the upper surface of the interference avoidance cam 34.

[0084] In adjacent traverse units 13 in the alignment direction Y, interference avoidance cams 33 and 34 are positioned next to each other. The interference avoidance cams 33 and 34 adjacent in the alignment direction Y are positioned close together such that the rotational trajectory of the projection 33a of the interference avoidance cam 33 and the rotational trajectory of the convex portion 34a of the interference avoidance cam 34 partially overlap on a plane parallel to the horizontal plane. In other words, the rotational trajectory of the projection 33a of the interference avoidance cam 33, which is the region through which the projection 33a of the interference avoidance cam 33 passes, and the rotational trajectory of the convex portion 34a of the interference avoidance cam 34 adjacent to the interference avoidance cam 33 in the alignment direction Y pass, are set to partially overlap. Furthermore, since the rotational trajectory of the projection 33a of the interference avoidance cam 33 and the rotational trajectory of the convex portion 34a of the interference avoidance cam 34 adjacent to the interference avoidance cam 33 in the alignment direction Y overlap, the convex portion 34a of the interference avoidance cam 34 will enter the rotational trajectory of the projection 33a of the interference avoidance cam 33. Therefore, the interference avoidance cams 33 and 34 adjacent to each other in the alignment direction Y are configured to rotate in opposite directions with an angle difference set so that the projection 33a and the convex portion 34a do not interfere with each other. When the convex portion 34a of the interference avoidance cam 34 enters the rotational trajectory of the projection 33a of the interference avoidance cam 33, the convex portion 34a enters the U-shaped groove between the projections 33a aligned in the circumferential direction of the interference avoidance cam 33 without interfering with the projection 33a.

[0085] As described above, the interference avoidance cams (33, 34) are configured to rotate in opposite directions to each other while being set to an angle difference such that adjacent interference avoidance cams 33 and 34 in the alignment direction Y do not interfere with each other. For this reason, in multiple traverse units 13, when adjacent first drive force transmission shafts 22 in the alignment direction Y have the same rotation speed, the adjacent interference avoidance cams 33 and 34 in the alignment direction Y rotate together with the first drive force transmission shafts 22 without contacting each other. In other words, when adjacent first drive force transmission shafts 22 in the alignment direction Y have the same rotation speed, the adjacent interference avoidance cams 33 and 34 in the alignment direction Y rotate together with the first drive force transmission shafts 22 without contacting each other.

[0086] Furthermore, the interference avoidance cams (33, 34) are configured such that the rotational trajectory of the projection 33a of the interference avoidance cam 33 and the rotational trajectory of the convex portion 34a of the interference avoidance cam 34 adjacent to the interference avoidance cam 33 in the alignment direction Y partially overlap. Therefore, in multiple traverse units 13, if there is a difference in the rotational speed of adjacent first drive force transmission shafts 22 in the alignment direction Y, the projection 33a of the interference avoidance cam 33 and the convex portion 34a of the interference avoidance cam 34 adjacent to the interference avoidance cam 33 in the alignment direction Y come into contact, thereby restricting the difference in rotational speed between the first drive force transmission shafts 22. Furthermore, the interference avoidance cams (33, 34) are configured such that the projection 33a of the interference avoidance cam 33 and the convex portion 34a of the interference avoidance cam 34 come into contact with each other, thereby restricting the difference in rotational speed between the first drive force transmission shafts 22, and thus avoiding interference between adjacent rotating blades (18, 19) in the alignment direction Y. In other words, when a difference in rotational speed occurs between adjacent first drive force transmission shafts 22 in the alignment direction Y, the projection 33a of the interference avoidance cam 33 and the convex portion 34a of the interference avoidance cam 34 come into contact with each other, thereby restricting the difference in rotational speed between the first drive force transmission shafts 22, and thus avoiding interference between adjacent rotating blades 18 and adjacent rotating blades 19 in the alignment direction Y.

[0087] As described above, when the rotational speeds of adjacent first drive force transmission shafts 22 in the alignment direction Y are the same, the interference avoidance cams 33 and 34 adjacent in the alignment direction Y do not come into contact. Therefore, under normal operating conditions of the traverse device 1A, the interference avoidance cams 33 and 34 do not come into contact. However, if the toothed transmission belt 12 is damaged, a difference in rotational speed will occur between adjacent first drive force transmission shafts 22 in the alignment direction Y. In this case, the interference avoidance cams 33 and 34 adjacent in the alignment direction Y will come into contact, and the difference in rotational speed between adjacent first drive force transmission shafts 22 in the alignment direction Y is restricted. Therefore, the difference in rotational speed between adjacent rotating blades 18 in the alignment direction Y is also restricted for the rotating blades 18 to which drive force is transmitted from the first drive force transmission shaft 22 via the second drive force transmission shaft 23. Similarly, for the rotating blades 19 to which driving force is transmitted from the first driving force transmission shaft 22 via the third driving force transmission shaft 24, the difference in rotational speed between adjacent rotating blades 19 in the alignment direction Y is restricted. As a result, interference between adjacent rotating blades 18 in the alignment direction Y is avoided, and interference between adjacent rotating blades 19 in the alignment direction Y is also avoided.

[0088] (4) In the above-described embodiment, a rotor blade (18, 19) having three blades (18a, 19a) extending radially along the radial direction was described as an example, but this is not required. The number of blades extending radially along the radial direction in the rotor blade is not limited to three, and for example, a rotor blade with two or four blades may be implemented. [Explanation of Symbols]

[0089] 1, 2 Traverse device 11 Drive motor 12-toothed transmission belt 13, 30 Traverse Unit 17 Traverse Guide 18, 19 Rotating blades 22. First drive force transmission shaft (drive force transmission shaft) 23. Second drive force transmission shaft (drive force transmission shaft) 24. Third drive force transmission shaft (drive force transmission shaft) 31 Drive motor 32 Control Unit 101 thread

Claims

1. A traverse device comprising multiple traverse units for winding yarn as a package, wherein multiple such traverse units are arranged in a row, The system further comprises a drive motor and a toothed transmission belt that is driven by the drive motor and transmits synchronized driving force to a plurality of traverse units, Each of the multiple traverse units is A traverse guide guides the traverse path, which is the path the thread takes as it moves back and forth in a crisscross pattern, A pair of rotating blades rotate in opposite directions to traverse the thread along the traverse guide and to transfer the thread at both ends of the traverse path, A drive force transmission shaft is driven by the driving force transmitted from the toothed transmission belt and transmits the driving force to the rotating blades, An interference avoidance cam is provided on the drive force transmission shaft to avoid interference between the rotating blades which are arranged adjacent to each other in the direction in which the multiple traverse units are aligned, It has, In the multiple traverse units, the rotating blades that are adjacent to each other in the direction of alignment and rotate in opposite directions are arranged along the same plane. In the multiple traverse units, the interference avoidance cams adjacent to each other in the alignment direction are: When the rotational speeds of adjacent drive force transmission shafts in the aforementioned alignment direction are the same, adjacent interference avoidance cams in the aforementioned alignment direction rotate together with the drive force transmission shafts without contacting each other. If a discrepancy occurs in the rotational speed of adjacent drive force transmission shafts in the aforementioned alignment direction, the interference avoidance cams adjacent to each other in the aforementioned alignment direction come into contact with each other, thereby restricting the discrepancy in rotational speed between the drive force transmission shafts and preventing interference between adjacent rotating blades in the aforementioned alignment direction. A traverse device characterized by the following features.

2. A traverse device comprising multiple traverse units for winding yarn as a package, wherein multiple such traverse units are arranged in a row, Each of the multiple traverse units is A traverse guide guides the traverse path, which is the path the thread takes as it moves back and forth in a crisscross pattern, A pair of rotating blades rotate in opposite directions to traverse the thread along the traverse guide and to transfer the thread at both ends of the traverse path, The drive motor and A drive force transmission shaft that is driven by the drive force transmitted from the drive motor and transmits the drive force to the rotating blade, An interference avoidance cam is provided on the drive force transmission shaft to avoid interference between the rotating blades which are arranged adjacent to each other in the direction in which the multiple traverse units are aligned, It has, In the multiple traverse units, the rotating blades that are adjacent to each other in the direction of alignment and rotate in opposite directions are arranged along the same plane. In the multiple traverse units, the interference avoidance cams adjacent to each other in the alignment direction are: When the rotational speeds of adjacent drive force transmission shafts in the aforementioned alignment direction are the same, adjacent interference avoidance cams in the aforementioned alignment direction rotate together with the drive force transmission shafts without contacting each other. If a discrepancy occurs in the rotational speed of adjacent drive force transmission shafts in the aforementioned alignment direction, the interference avoidance cams adjacent to each other in the aforementioned alignment direction come into contact with each other, thereby restricting the discrepancy in rotational speed between the drive force transmission shafts and preventing interference between adjacent rotating blades in the aforementioned alignment direction. The system further includes a control unit that controls the drive motors provided in each of the multiple traverse units to rotate at the same rotational speed. A traverse device characterized by the following features.

3. The interference avoidance cam has a plurality of protrusions that project radially along the radial direction with respect to the drive force transmission shaft, If a discrepancy occurs in the rotational speed of adjacent drive force transmission shafts in the aforementioned alignment direction, the protrusions of adjacent interference avoidance cams in the aforementioned alignment direction come into contact with each other, thereby restricting the discrepancy in rotational speed between the drive force transmission shafts. A traverse device according to claim 1 or 2.

4. The multiple protrusions are provided along the outer circumference of the interference avoidance cam and are arranged at equal angular intervals in the circumferential direction of the interference avoidance cam. The traverse device according to feature 3.

Images