Fiber bundle concentrating device for spinning machines

Abstract

To provide a fiber bundle-gathering device of a spinning machine, capable of positioning a coupling to a position where a bolt can be easily operated when stopping the fiber bundle-gathering device.SOLUTION: A fiber bundle-gathering device 10 is assembled with: a rotation position detection part 30 for output of a rotation positional information of a counter shaft 20 by detection of a detection face 60c; a control device 40 which receives the rotation positional information output from the rotation position detection part 30 and controls rotation of the counter shaft 20; and an operation part 41 which outputs a stop command to stop rotation of the counter shaft 20 to the control device 40. The control device 40 controls drive of the counter shaft 20 in a manner that when rotation of the counter shaft 20 is stopped, the coupling 70 is positioned in an operation range when a stop command is input from the operation part 41 based on the rotation positional information input from the rotation position detection part 30.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fiber bundle collecting device for a spinning machine. [Background technology]

[0002] A fiber bundle concentrating device of a spinning machine pre-concentrates fiber bundles drafted by a drafting device before twisting. This concentrating improves yarn quality, such as reduced fuzz and increased yarn strength. The fiber bundle concentrating device is provided on the frame of the spinning machine. As disclosed in Patent Document 1, for example, such a fiber bundle concentrating device includes a rotary shaft equipped with a delivery bottom roller that delivers the fiber bundle, and a countershaft for rotating the rotary shaft. A drive gear is provided on the countershaft, and a passive gear is provided on the rotary shaft. The drive gear is engaged with the passive gear. This engagement transmits rotational force from the countershaft to the rotary shaft.

[0003] Generally, since the frame of a spinning machine is long and large, it is difficult to drive the fiber bundle concentrating device with a single countershaft. For this reason, the fiber bundle concentrating device is provided with multiple countershafts. The multiple countershafts are arranged in the axial direction of the countershafts, and axially adjacent countershafts are connected by a coupling. In this case, the coupling connects the countershafts by tightening a bolt. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] European Patent Application Publication No. 1473388 Summary of the Invention [Problem to be solved by the invention]

[0005] For maintenance of the fiber bundle concentrating device, etc., it may be necessary to release the connection between the countershafts by the coupling. In this case, it is necessary to stop the drive of the fiber bundle concentrating device to stop the rotation of the countershafts, and then release the tightening of the bolts. Furthermore, after the maintenance is completed, it is necessary to tighten the bolts again. However, depending on the rotational position of the coupling when the drive of the fiber bundle concentrating device is stopped and the rotation of the countershafts is stopped, it can be very difficult to operate the bolts. [Means for solving the problem]

[0006] A fiber bundle concentrating device for a spinning machine that solves the above problems includes a delivery bottom roller that is provided on a rotating shaft and transports a fiber bundle, a suction section that exerts a suction effect on the fiber bundle, a ventilation apron that rotates along the suction section, and a delivery top roller that rotates together with the delivery bottom roller that comes into contact with the delivery top roller via the ventilation apron, and comprises a condensing unit that concentrating the drafted fiber bundle, a countershaft that rotates the rotating shaft, the countershafts being a plurality of countershafts that are aligned in the axial direction of the countershaft, a countershaft drive motor that drives the countershaft, and a coupling that connects the countershafts adjacent to each other in the axial direction and rotates integrally with the countershaft, the coupling connects the countershafts by fastening a coupling body that is spanned between ends of the adjacent countershafts with a bolt, and the countershaft a detectable portion provided on a bolt or the coupling for detecting a rotational position of the countershaft; a rotational position detection portion for outputting rotational position information of the countershaft by detecting the detectable portion; a control device that receives the rotational position information output by the rotational position detection portion and controls the countershaft drive motor; and an operation portion that outputs a stop command to the control device, wherein an operation range of the coupling is a rotational position range of the coupling where the bolt can be operated relative to the coupling body from the front, and when the stop command is input from the operation portion, the control device controls the drive of the countershaft drive motor based on the rotational position information input from the rotational position detection portion so that the coupling is positioned within the operation range when the rotation of the countershaft is stopped.

[0007] According to this, when a stop command is output from the operation unit, the rotation of the countershaft drive motor stops, and the rotation of the countershaft stops, the coupling is positioned within the operation range. Therefore, when the fiber bundle focusing device is stopped, the coupling can be positioned at a position where the bolt can be easily operated. As a result, after the drive of the fiber bundle focusing device is stopped, the bolt can be easily operated relative to the coupling body.

[0008] The fiber bundle collecting device of the spinning machine may include a plurality of the couplings, and all of the plurality of couplings may be aligned in the rotational position. With this, when a stop command is output from the operating unit, the countershaft drive motor stops driving and the countershaft stops rotating, and all couplings are positioned within the operating range, making it possible to operate the bolt relative to the coupling body for any coupling.

[0009] In a fiber bundle concentrating device of a spinning machine, a detection shaft may be connected to the counter shaft located at one end of a plurality of counter shafts lined up, the detection shaft may rotate as a counter shaft, the axial length of the detection shaft may be shorter than the axial length of the counter shaft, and the detectable part may be provided on the detection shaft.

[0010] This allows the fiber bundle concentrating device to be made smaller than when, for example, a counter shaft provided with a detected portion is connected to a counter shaft at one end in the axial direction. Regarding the fiber bundle collecting device of a spinning machine, the spinning machine is provided with a spindle drive motor that drives a spindle to wind up the fiber bundle collected by the fiber bundle collecting device, and the control device includes a synchronization control unit that drives the counter shaft drive motor and the spindle drive motor in synchronization with each other, a detection speed setting unit that sets a detection speed, which is a rotational speed of each of the counter shaft drive motor and the spindle drive motor and which is set for each of the counter shaft drive motor and the spindle drive motor, and which is slower than the rotational speed at the time when the stop command is input from the operation unit, and a detection speed setting unit that sets a detection speed when the spinning machine is stopped during operation and the rotation of the counter shaft has stopped. and a mode setting unit that sets a first maintenance mode that positions the coupling within the operation range to be executable, and when the first maintenance mode is set to be executable by the mode setting unit and the stop command is input from the operation unit during operation of the spinning machine, the synchronization control unit may drive each of the counter shaft drive motor and the spindle drive motor to synchronously decelerate to the detection speed, drive the counter shaft drive motor and the spindle drive motor synchronously at the detection speed, and stop driving each of the counter shaft drive motor and the spindle drive motor when the rotational position detection unit detects the detected part.

[0011] According to this, when the mode setting unit sets the first maintenance mode to be executable and a detection signal is output from the rotational position detection unit while the machine is being driven at the detection speed, the synchronization control unit synchronizes and stops the countershaft drive motor and the spindle drive motor. Then, the spindle stops following the countershaft stopping so that the coupling is positioned within the operating range. In other words, the countershaft can be stopped based on the rotational position of the countershaft to position the coupling within the operating range, and the spindle can be stopped following the countershaft. Furthermore, because each of the countershaft drive motor and the spindle drive motor is stopped after being decelerated to the detection speed, rotation due to inertia after stopping can be reduced. As a result, even if the countershaft is stopped at a desired position, the difference in rotation speed relative to the spindle can be reduced, thereby preventing breakage of the fiber bundle.

[0012] Regarding the fiber bundle collecting device of a spinning machine, the spinning machine includes a spindle drive motor that drives a spindle to wind up the fiber bundle collected by the fiber bundle collecting device, and the control device includes a synchronization control unit that drives the counter shaft drive motor and the spindle drive motor in synchronization with each other, a detection speed setting unit that sets a detection speed, which is a rotational speed of each of the counter shaft drive motor and the spindle drive motor and which is set for each of the counter shaft drive motor and the spindle drive motor, and which is slower than the rotational speed at the time when the stop command is input from the operation unit, and a control unit that starts the spinning machine when it is stopped. and a mode setting unit that sets a second maintenance mode to be executable when the spinning machine is stopped after rotation of the countershaft has stopped and rotation of the countershaft has stopped, and when the second maintenance mode is set to be executable by the mode setting unit and a command to execute the second maintenance mode is input to the stopped spinning machine, the synchronization control unit may drive the countershaft drive motor and the spindle drive motor in synchronization with each other at the detection speed, and stop driving the countershaft drive motor and the spindle drive motor when the rotation position detection unit detects the detected portion.

[0013] According to this, when the mode setting unit sets the second maintenance mode to be executable, if a detection signal is output from the rotational position detection unit while the spinning machine is being driven at the detection speed after startup, the synchronization control unit synchronizes and stops the countershaft drive motor and the spindle drive motor. Then, the spindle stops following the countershaft stopping so that the coupling is positioned within the operation range. In other words, based on the rotational position of the countershaft, the countershaft can be stopped to position the coupling within the operation range, and the spindle can be stopped following the countershaft. Furthermore, because the countershaft drive motor and the spindle drive motor each stop while rotating at the detection speed, rotation due to inertia after stopping can be reduced. As a result, even if the countershaft is stopped at a desired position, the difference in rotation speed relative to the spindle can be reduced, thereby preventing breakage of the fiber bundle. Furthermore, even if maintenance of the fiber bundle collecting device is desired while the spinning machine is stopped, the countershaft can be positioned to facilitate maintenance by executing the second maintenance mode.

[0014] With respect to the fiber bundle collecting device of a spinning machine, the mode setting unit may set a normal stop mode to be executable in which the counter shaft drive motor is caused to follow the spindle drive motor and the spindle drive motor and the counter shaft drive motor are stopped.

[0015] This allows the operator to select how to stop the spinning machine, thereby meeting the operator's needs. [Effects of the Invention]

[0016] According to the present invention, when the fiber bundle concentrating device is stopped, the coupling can be positioned at a position where the bolt can be easily operated. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a front view schematically showing a spinning machine and a fiber bundle collecting device according to a first embodiment. FIG. [Figure 2] FIG. 2 is a cross-sectional view showing a condensation unit. [Figure 3] FIG. [Figure 4] FIG. 10 is a cross-sectional view showing the coupling in the operating range. [Figure 5] FIG. 10 is a cross-sectional view showing the coupling in the operating range. [Figure 6] FIG. [Figure 7] FIG. 10 is a front view showing the state in which the jig body is attached to the countershaft. [Figure 8] FIG. 10 is a side view showing the state in which the jig body is attached to the countershaft. [Figure 9] FIG. [Figure 10] FIG. 2 is a partial perspective view showing a detection surface of the detection shaft. [Figure 11] FIG. 4 is a configuration diagram schematically showing a spinning machine according to a second embodiment. [Figure 12] FIG. 2 is a diagram schematically illustrating an input unit. [Figure 13] FIG. 10 is a diagram illustrating a normal stop mode. [Figure 14] FIG. 10 is a diagram illustrating a first maintenance mode. [Figure 15] FIG. 10 is a diagram illustrating a second maintenance mode. [Figure 16] FIG. 4 is a partial perspective view showing a detection surface of the coupling. DETAILED DESCRIPTION OF THE INVENTION

[0018] (First embodiment) A first embodiment of a fiber bundle bundling device for a spinning machine will be described below with reference to FIGS.

[0019] <Overall fiber bundle concentrating device for spinning machines> The fiber bundle concentrating device of the spinning machine is provided downstream of the draft device. In the following description, the "fiber bundle concentrating device of the spinning machine" will be simply referred to as the "fiber bundle concentrating device." The fiber bundle concentrating device pre-concentrates the drafted fiber bundles before twisting. The fiber bundle concentrating device also performs processes such as reducing fuzz in the concentrated fiber bundles.

[0020] <Spinning machine> As shown in FIG. 1, the spinning machine 100 includes a fiber bundle bundling device 10, an out-end head 101, a gear end head 102, and a plurality of support plates 50. The out-end head 101 and the gear end head 102 are mounted on a machine base (not shown). A countershaft drive motor 103 is built in the gear end head 102. The countershaft drive motor 103 drives the fiber bundle bundling device 10. The draft device is provided on the rear side of the fiber bundle bundling device 10 in the direction perpendicular to the plane of FIG. 1. After being processed by the fiber bundle bundling device 10, the fiber bundle F is transported downward toward the front side in the direction perpendicular to the plane of FIG. 1. The front side in the direction perpendicular to the plane of FIG. 1 is the front side of the fiber bundle bundling device 10. Therefore, the fiber bundle F processed by the fiber bundle bundling device 10 is transported toward the front of the fiber bundle bundling device 10. A front view refers to a view of the fiber bundle bundling device 10 from the front. The direction in which the out-end head 101 and the gear-end head 102 face each other is defined as a longitudinal direction X of the spinning machine 100.

[0021] <Support plate> The support plate 50 is fixed to a roller stand (not shown). A plurality of support plates 50 are arranged between the out-end head 101 and the gear end head 102.

[0022] Figure 8 shows a schematic diagram of the support plate 50. As shown in Figure 8, a shaft groove 53 is formed in the support plate 50. In a side view of the support plate 50 in the longitudinal direction X of the spinning machine 100, the shaft groove 53 has an arc shape and opens forward and obliquely upward.

[0023] <Fiber bundle concentrating device> 1, the fiber bundle focusing device 10 is disposed between an out-end head 101 and a gear-end head 102. The fiber bundle focusing device 10 includes a plurality of condensation units 11, a plurality of counter shafts 20, and a coupling 70 that connects adjacent counter shafts 20. The fiber bundle focusing device 10 also includes a rotational position detection unit 30, a control device 40, an operation unit 41, and a detection surface 60c as a detection target.

[0024] <Condensation Unit> The condensing unit 11 condenses the drafted fiber bundle F. 1 and 2, the condensation unit 11 has a rotating shaft 12, a delivery bottom roller 13, a suction section 14, a ventilation apron 15, and a delivery top roller 16. The delivery bottom roller 13 is provided on the rotating shaft 12 and rotates integrally with the rotating shaft 12. A passive gear 18 is provided on the rotating shaft 12.

[0025] The suction section 14 has a plurality of suction holes (not shown). The suction section 14 exerts a suction effect on the transported fiber bundle F via a breathable apron 15. The breathable apron 15 is formed of an endless woven fabric that ensures breathability. The breathable apron 15 is wrapped around the delivery bottom roller 13, the suction section 14, and the guide section 19. The breathable apron 15 rotates along the suction section 14. The delivery top roller 16 is in contact with the delivery bottom roller 13 via the breathable apron 15, and rotates together with the delivery bottom roller 13.

[0026] As shown in FIG. 1, the fiber bundle collecting device 10 has eight spindles of condensation units 11 as one unit. The fiber bundle collecting device 10 has a plurality of condensation units 11 between an out-end head 101 and a gear-end head 102. Each condensation unit 11 is arranged between support plates 50. Two support plates 50 (one unit) are arranged between adjacent condensation units 11 in the longitudinal direction X. A rotating shaft bearing 51 and a shaft bearing 52 are arranged between the support plates 50 (one unit). The rotating shaft 12 is rotatably supported by the support plates 50 via the rotating shaft bearing 51.

[0027] <Countershaft> The countershaft 20 rotates the rotary shaft 12. The countershafts 20 are arranged in the axial direction of the countershafts 20. The countershafts 20 are rotatably supported on the support plate 50 via shaft bearings 52. The countershafts 20 are arranged in the longitudinal direction X of the spinning machine 100. Each countershaft 20 includes a shaft body 20a, a first connecting end 20b, and a second connecting end 20c. The first connecting end 20b is provided at a first axial end of the shaft body 20a. The second connecting end 20c is provided at a second axial end of the shaft body 20a. The axial length of the first connecting end 20b is shorter than the axial length of the second connecting end 20c. The first connecting end 20b and the second connecting end 20c have smaller diameters than the shaft body 20a.

[0028] 3, the first connecting end 20b faces the second connecting end 20c of the adjacent countershaft 20. The second connecting end 20c is inserted between the support plates 50 and is rotatably supported by the support plates 50 via shaft bearings 52.

[0029] As shown in FIG. 1 , the countershaft 20 is provided with a drive gear 21. The drive gear 21 is disposed axially on the countershaft 20, closer to the first connecting end 20b. The driven gear 18 and the drive gear 21 may be disposed axially on the countershaft 20, closer to the second connecting end 20c, or at the center in the axial direction. The drive gear 21 meshes with the driven gear 18 of the rotating shaft 12. When the drive gear 21 rotates together with the countershaft 20, the driven gear 18 of the rotating shaft 12 is rotated. As the driven gear 18 rotates, the delivery bottom roller 13 rotates together with the rotating shaft 12. As the delivery bottom roller 13 rotates, the ventilation apron 15 rotates and the fiber bundle F is fed. Therefore, the delivery bottom roller 13 feeds the fiber bundle F.

[0030] The fiber bundle F is sandwiched between a delivery bottom roller 13 and a delivery top roller 16 that rotate in response to the rotation of the rotary shaft 12 driven by the counter shaft 20, and is conveyed while being sucked into the suction section 14 via the ventilation apron 15.

[0031] <Detection shaft> The detection shaft 60, which also serves as a countershaft, is connected to the countershaft 20 located at one end of the multiple countershafts 20 lined up. More specifically, the detection shaft 60 is connected to the countershaft 20 closest to the outer head 101. This detection shaft 60 rotates as a countershaft. The axial length of the detection shaft 60 is shorter than the axial length of the countershafts 20.

[0032] A first end 60a of the detection shaft 60 is connected to a second connecting end 20c of the countershaft 20 by a coupling 70. A second end 60b of the detection shaft 60 protrudes outward from the out-end head 101 and is rotatably supported by a bearing 105. A detection surface 60c is provided on the second end 60b of the detection shaft 60 as a detection target. Therefore, the countershaft 20 is provided with the detection surface 60c as a detection target. This detection surface 60c is provided to detect the rotational position of the countershaft 20. As shown in FIG. 10 , the detection surface 60c is a flat surface extending in the axial and radial directions of the detection shaft 60.

[0033] <Coupling> As shown in Figures 3, 4, and 5, the coupling 70 includes a coupling body 73 and a plurality of bolts 80. The coupling body 73 includes a first connecting member 71 and a second connecting member 72. The axial direction of the coupling 70 is the axial direction of the first connecting member 71 and the second connecting member 72, and the radial direction of the coupling 70 is the radial direction of the first connecting member 71 and the second connecting member 72. The first connecting member 71 and the second connecting member 72 are semi-cylindrical. The first connecting member 71 and the second connecting member 72 each include an accommodating recess 79. The accommodating recess 79 is a recess for accommodating the first connecting end portion 20b and the second connecting end portion 20c. The first connecting member 71 and the second connecting member 72 each include mating surfaces 74 that radially sandwich the accommodating recess 79.

[0034] The first connecting member 71 is formed with a bolt head accommodating portion 75 and an insertion hole 76 that communicates with the bolt head accommodating portion 75. The bolt head accommodating portion 75 opens into an arc-shaped surface on the outer surface of the first connecting member 71. The insertion hole 76 opens into a mating surface 74 of the first connecting member 71. The bolt head accommodating portion 75 and the insertion hole 76 are aligned in a row in the axial direction of the first connecting member 71 along the accommodating recess 79. The bolt head accommodating portion 75 and the insertion hole 76 are arranged on both sides of the accommodating recess 79 so as to sandwich the accommodating recess 79 in the radial direction.

[0035] An internal thread 77 is formed on the second connecting member 72. The internal thread 77 communicates between the arc-shaped surface of the outer surface of the first connecting member 71 and the mating surface 74. The internal threads 77 are aligned in a row in the axial direction of the second connecting member 72 along the accommodating recess 79. The internal threads 77 are arranged on both sides of the accommodating recess 79 so as to sandwich the accommodating recess 79 in the radial direction.

[0036] The bolt 80 has a bolt head 80a and a bolt shank 80b. An operation hole 80c is formed in the bolt head 80a. The operation hole 80c is a hexagonal hole. The bolt 80 is operated by inserting an operation tool 90 into the operation hole 80c. The operation tool 90 is a long hexagonal rod.

[0037] The coupling 70 connects the countershafts 20 that are adjacent in the axial direction of the countershafts 20, and rotates integrally with the countershafts 20. The bolt shank 80b is inserted into the insertion hole 76 through the bolt head accommodating portion 75 of the first connecting member 71, and is threaded into the female thread 77 of the second connecting member 72. By threading the bolt shank 80b into the female thread 77, the first connecting member 71 and the second connecting member 72 are brought close to each other and the coupling body 73 is tightened. The coupling 70 is formed by tightening the coupling body 73 with the bolt 80.

[0038] The coupling body 73 spans the first connecting end 20b and the second connecting end 20c that are adjacent in the longitudinal direction X. A portion of the bolt head 80a is accommodated in the bolt head accommodating portion 75. The first connecting end 20b and the second connecting end 20c are sandwiched between the accommodating recesses 79 of the first connecting member 71 and the accommodating recesses 79 of the second connecting member 72. This connects the countershafts 20 to each other. Therefore, the coupling 70 connects the adjacent countershafts 20 by tightening the coupling body 73 that spans the ends of the adjacent countershafts 20 with the bolt 80. All of the countershafts 20 and the detection shafts 60 included in the fiber bundle collecting device 10 are connected by the coupling 70. Therefore, all of the countershafts 20 and the detection shafts 60 rotate integrally.

[0039] With respect to the countershaft 20, the position of a point in the circumferential direction of the countershaft 20, i.e., the rotational position, changes in the rotational direction as the countershaft 20 rotates. The position of a point in the circumferential direction of the coupling 70, i.e., the rotational position, changes in the rotational direction as the countershaft 20 rotates. All of the couplings 70 connect the countershafts 20 with the positions of the bolt head receiving portions 75 aligned in the rotational direction of the countershaft 20. In other words, the rotational positions of all of the multiple couplings 70 are aligned.

[0040] 1, the positions of the bolt head receiving portions 75 of all couplings 70 in the rotational direction of the countershaft 20, i.e., the rotational positions, are aligned with respect to the detected surface 60c of the detection shaft 60. More specifically, the direction in which the detected surface 60c faces is the same as the direction in which the bolt head receiving portions 75 face. Therefore, when the rotational position of the detection shaft 60 is such that the detected surface 60c faces forward, the bolt head receiving portions 75 of each coupling 70 face forward.

[0041] Therefore, when viewed from the front of the fiber bundle collecting device 10, if an operator can see the bolt head accommodating portion 75 of one coupling 70, the operator can also see the bolt head accommodating portions 75 of all the remaining couplings 70.

[0042] To couple the countershafts 20 together using the coupling 70, the bolt shank 80b is inserted into the insertion hole 76 through the bolt head housing 75, and then an operating tool 90 is inserted into the operating hole 80c in the bolt head 80a. The bolt shank 80b must then be screwed into the female thread 77 by operating the operating tool 90. To release the coupling of the countershafts 20 together using the coupling 70, the operating tool 90 must be inserted into the operating hole 80c in the bolt head 80a and then operated to remove the bolt shank 80b from the female thread 77.

[0043] If the bolt head accommodating portion 75 is not positioned within a predetermined operation range, the operator cannot operate the bolt 80 using the operating tool 90 from the front side of the fiber bundle collecting device 10. For example, this may occur if the bolt head accommodating portion 75 is hidden by the rotating shaft 12. Therefore, as shown in FIG. 4, one end of the operation range is a position below the rotating shaft 12 where the bolt head accommodating portion 75 opens forward so that it is not hidden by the rotating shaft 12. Here, "forward" is not limited to the horizontal direction and includes a case where the operating tool 90 is slightly upward from the horizontal direction as long as it does not interfere with the rotating shaft 12. As shown in FIG. 5, the other end of the operation range is set at a position where the bolt head accommodating portion 75 opens forward and diagonally downward. Note that the position shown in FIG. 4 is shifted by 90 degrees from the position shown in FIG. 5. The other end of the operation range may be set appropriately within a range where the operating tool 90 does not interfere with a structure located below the operating tool 90, such as a suction cleaning device. The operation range is a range in which the bolt 80 can be operated relative to the coupling body 73 from the front of the fiber bundle collecting device 10 .

[0044] <Mounting jig> As shown in Fig. 7, an attachment jig 83 is used when connecting countershafts 20 to each other using the coupling 70. The attachment jig 83 is used when attaching the coupling 70 while aligning the circumferential position of the countershaft 20. The attachment jig 83 is attached to the countershaft 20 when in use. The attachment jig 83 includes a jig main body 84, a first protrusion 85, and a second protrusion 86. The jig main body 84 includes a first end face 84a and a second end face 84b. The first end face 84a and the second end face 84b are end faces of the jig main body 84 in the axial direction.

[0045] As shown in FIG. 6, the jig body 84 has a mounting recess 84c extending in the axial direction of the jig body 84. The mounting recess 84c is a recess extending in the axial direction of the jig body 84. The mounting recess 84c is open at both axial ends of the jig body 84. When the jig body 84 is viewed in the axial direction, each of the first end face 84a and the second end face 84b is approximately C-shaped. The jig body 84 has opening edges 84d extending in the axial direction to sandwich the mounting recess 84c. The pair of opening edges 84d are parallel. The direction in which the pair of opening edges 84d face each other across the mounting recess 84c is defined as the width direction of the jig body 84. The direction from one of the pair of opening edges 84d to the other along the first end face 84a and the second end face 84b of the jig body 84 is defined as the circumferential direction. A position equidistant from the pair of opening edges 84d in the circumferential direction is defined as an intermediate position P.

[0046] The first protrusion 85 is provided on a first end surface 84a of the jig body 84. The first protrusion 85 is disposed on the first end surface 84a closer to one opening edge 84d than the intermediate position P. The first protrusion 85 is cylindrical and protrudes in the axial direction from the first end surface 84a. The mounting recess 84c is attached to the shaft body 20a from above, and the first protrusion 85 is brought into contact with the shaft groove 53. This allows the mounting jig 83 to be positioned so that the mounting recess 84c opens downward, and restricts relative rotation of the mounting jig 83 with respect to the countershaft 20.

[0047] The second protrusion 86 is provided at an intermediate position P of the second end surface 84b of the jig body 84. The second protrusion 86 is plate-shaped. The thickness direction of the second protrusion 86 is the same as the width direction of the jig body 84.

[0048] <How to use the mounting jig> As shown in Figures 7 and 8, the mounting recess 84c is mounted on the second connecting end 20c of one of the adjacent countershafts 20. At this time, the first connecting end 20b of the other countershaft 20 faces the second connecting end 20c. Then, the mounting jig 83 is mounted on the second connecting end 20c, and the first protrusion 85 is brought into contact with the surface forming the shaft groove 53. This positions the mounting jig 83 so that the mounting recess 84c opens downward. At the same time, relative rotation of the mounting jig 83 with respect to the countershaft 20 is restricted. At this time, the second protrusion 86 is located at the top of the second end face 84b, and the thickness direction of the second protrusion 86 is aligned with the front-to-rear direction of the spinning machine 100.

[0049] Next, as shown in FIG. 9 , the first connecting member 71 is positioned in front of the second protrusion 86, and the second connecting member 72 is positioned behind the second protrusion 86, so that the second protrusion 86 is sandwiched between the first connecting member 71 and the second connecting member 72. At this time, the second connecting end 20c and the first connecting end 20b are sandwiched between the first connecting member 71 and the second connecting member 72. Then, when the mating surface 74 of the first connecting member 71 is brought into contact with the front surface of the second protrusion 86, the first connecting member 71 can be positioned so that the bolt head accommodating portion 75 of the first connecting member 71 faces forward. Furthermore, when the mating surface 74 of the second connecting member 72 is brought into contact with the rear surface of the second protrusion 86, the second connecting member 72 can be positioned so that the female thread 77 of the second connecting member 72 faces rearward.

[0050] Furthermore, one axial end face of each of the first and second connecting members 71 and 72 is brought into contact with the second end face 84b. This causes the accommodating recess 79 of the first connecting member 71 and the accommodating recess 79 of the second connecting member 72 to face each other, and also causes the mating surface 74 of the first connecting member 71 and the mating surface 74 of the second connecting member 72 to face each other. Therefore, the insertion hole 76 of the first connecting member 71 and the female thread 77 of the second connecting member 72 also face each other.

[0051] Then, when the bolt shank 80b inserted into the insertion hole 76 through the bolt head accommodating portion 75 is screwed into the female thread 77, the first connecting member 71 and the second connecting member 72 can be connected by the bolt 80. As a result, the first connecting end portion 20b and the second connecting end portion 20c accommodated in the accommodating recess 79 can be sandwiched by the coupling body 73, and the countershafts 20 can be connected to each other by the couplings 70. By repeating this process, the countershafts 20 can be connected to each other while aligning the rotational positions of all of the couplings 70.

[0052] <Rotational position detection unit> As shown in FIG. 1 , the rotational position detection unit 30 is disposed close to the out-end head 101. The rotational position detection unit 30 faces the second end 60b of the detection shaft 60. The rotational position detection unit 30 is, for example, a proximity sensor. The rotational position detection unit 30 detects the approach of the detection surface 60c of the detection shaft 60 in a non-contact manner. The rotational position detection unit 30 outputs a detection signal each time it detects the detection surface 60c. The rotational position detection unit 30 outputs the detection signal at an interval of one pulse per rotation of the detection shaft 60. As the rotational speed of the countershaft 20 (i.e., the rotational speed of the countershaft drive motor 103) increases, the output interval of the detection signal by the rotational position detection unit 30 decreases. On the other hand, as the rotational speed of the countershaft 20 (i.e., the rotational speed of the countershaft drive motor 103) decreases, the output interval of the detection signal by the rotational position detection unit 30 increases. Therefore, the detection signal output by the rotational position detection unit 30 represents rotational position information of the countershaft 20. Therefore, the rotational position detection unit 30 outputs rotational position information of the countershaft 20 by detecting the detection target surface 60c.

[0053] As described above, when the detection shaft 60 is rotated to a position where the detected surface 60c faces forward, the bolt head accommodating portion 75 of each coupling 70 faces forward. Therefore, when the rotational position detection unit 30 outputs a detection signal, the bolt head accommodating portion 75 of each coupling 70 is in a position where it faces forward. In other words, the rotational position of each coupling 70 is a position where the bolt head accommodating portion 75 faces forward and is located within the operation range.

[0054] <Control device> The control device 40 includes a processor (not shown) and a storage unit. Examples of the processor include a central processing unit (CPU), a graphics processing unit (GPU), and a digital signal processor (DSP). The storage unit includes a random access memory (RAM) and a read-only memory (ROM). The storage unit stores program code or instructions configured to cause the processor to execute a process. The storage unit, i.e., a computer-readable medium, includes any available medium accessible by a general-purpose or special-purpose computer. The control device 40 may be configured with hardware circuits such as an application-specific integrated circuit (ASIC) or a field-programmable gate array (FPGA). The control device 40, which is a processing circuit, may include one or more processors operating according to a computer program, one or more hardware circuits such as an ASIC or an FPGA, or a combination thereof.

[0055] The control device 40 receives the detection signal output from the rotational position detection unit 30 and controls the driving of the counter shaft drive motor 103. The control device 40 outputs a drive signal to the counter shaft drive motor 103 to drive the counter shaft drive motor 103. By driving the counter shaft drive motor 103, the counter shaft 20 rotates and the fiber bundle collecting device 10 is driven.

[0056] An operation unit 41 is connected to the control device 40. Examples of the operation unit 41 include a dial, a physical button, and a touch panel. In the present embodiment, the operation unit 41 is a physical button. The operation unit 41 is operated to temporarily suspend or completely stop the drive of the fiber bundle concentrating device 10 and stop the drive of the counter shaft 20. The operation unit 41 outputs a stop command to stop the drive of the counter shaft 20 to the control device 40. The operation unit 41 may be installed in the gear end head 102 or the out-end head 101, or in a higher-level control device of the spinning machine 100, as long as it can perform an operation to stop the drive of the counter shaft 20.

[0057] When the fiber bundle collecting device 10 is operating, a detection signal is periodically input to the control device 40 from the rotation position detection unit 30. The control device 40 controls the rotation speed of the counter shaft drive motor 103 based on the detection signal.

[0058] When a stop command is output from the operation unit 41 and a stop command is input to the control device 40, the control device 40 switches the control of the countershaft drive motor 103 from rotation speed control to position control. More specifically, when the stop command is input from the operation unit 41, the control device 40 controls the drive of the countershaft 20 based on the detection signal input from the rotation position detection unit 30 so that the coupling 70 is positioned within the operation range when the rotation of the countershaft 20 is stopped. More specifically, when the stop command is input, the control device 40 detects the rotation position of the countershaft 20 based on the detection signal from the rotation position detection unit 30, and controls the position so that the countershaft 20 stops at a predetermined rotation position. More specifically, the control device 40 controls the drive of the countershaft drive motor 103 so that the coupling 70 stops within the operation range.

[0059] In this embodiment, as shown in Figures 4 and 5, the control device 40 controls the driving of the countershaft drive motor 103 so that the bolt head accommodating portion 75 is positioned below the rotating shaft 12, between a position where it opens forward and a position where it opens diagonally downward, that is, from one end to the other end of the operating range.

[0060] [Operation of the first embodiment] For example, for maintenance of the fiber bundle collecting device 10, the fiber bundle collecting device 10 may be temporarily stopped, and then the drive gear 21, the shaft bearing 52, the counter shaft 20, etc. may be replaced.

[0061] The operator operates the operating unit 41. When the control device 40 receives a stop command from the operating unit 41, it switches the control of the countershaft drive motor 103 from rotation speed control to position control. The control device 40 performs position control so that the countershaft 20 stops at a predetermined rotational position based on a detection signal from the rotational position detection unit 30. When the rotation of the countershaft 20 stops, the bolt head accommodating portions 75 of all couplings 70 are positioned within the operation range. Therefore, the operator can operate the bolt heads 80a accommodated in the bolt head accommodating portions 75 from the front of the fiber bundle focusing device 10 using the operating tool 90. Then, the operator operates the bolt 80 using the operating tool 90 to remove the bolt 80 from the female thread 77 and from the coupling main body 73 through the insertion hole 76 and the bolt head accommodating portion 75. As a result, the coupling main body 73 can be disassembled into the first connecting member 71 and the second connecting member 72, and the connection between the countershafts 20 by the coupling 70 can be released. Similar processing is performed for the other couplings 70. This makes it possible to move the countershaft 20 in the longitudinal direction X, allowing replacement of the drive gear 21, shaft bearing 52, countershaft 20, etc.

[0062] After maintenance is completed, the countershafts 20 are returned to their original positions and the countershafts 20 are reconnected by the couplings 70. Because the countershafts 20 are stopped so that the detection surfaces 60c face forward, the bolt head housing portions 75 of the couplings 70 other than the removed coupling 70 face forward.

[0063] Then, the coupling 70 is attached to the countershafts 20 using the attachment jig 83, and the countershafts 20 are connected to each other. At this time, the operator can operate the operating tool 90 from the front of the fiber bundle collecting device 10. Then, the operator operates the bolt 80 with the operating tool 90, and inserts the bolt shank 80b into the insertion hole 76 through the bolt head accommodating portion 75, and screws it into the female thread 77. As a result, the bolt 80 is screwed into the coupling main body 73, and the countershafts 20 can be connected to each other by the coupling 70.

[0064] According to the first embodiment, the following effects can be obtained. (1-1) When the operating unit 41 is operated and a stop command is input to the control device 40, the control device 40 controls the driving of the countershaft drive motor 103 to stop the driving of the fiber bundle collecting device 10. Then, when the rotation of the countershaft 20 stops, the coupling 70 is positioned within the operating range. Therefore, when the driving of the fiber bundle collecting device 10 stops, the coupling 70 can be positioned at a position where the bolt 80 can be easily operated. As a result, after the driving of the fiber bundle collecting device 10 is stopped, the bolt 80 can be easily operated relative to the coupling body 73.

[0065] (1-2) The fiber bundle collecting device 10 includes a plurality of couplings 70. The rotational positions of all of the plurality of couplings 70 are aligned. Therefore, when a stop command is output from the operation unit 41 and the rotation of the counter shaft 20 stops, all of the couplings 70 are positioned within the operation range. Therefore, the bolt 80 can be operated relative to the coupling body 73 of any of the couplings 70.

[0066] (1-3) The detected surface 60c is provided on the detection shaft 60. For example, compared to a case where another counter shaft 20 having a detected surface is connected to the counter shaft 20 closest to the out-end head 101, the fiber bundle collecting device 10 can be made smaller in size in the longitudinal direction X.

[0067] (1-4) When the fiber bundle collecting device 10 is stopped by the control device 40, the coupling 70 can be positioned within the operation range. Therefore, the bolt 80 can be operated with respect to the coupling body 73 when the fiber bundle collecting device 10 is stopped. Therefore, the bolt 80 can be operated even when the operation of the fiber bundle collecting device 10 is stopped, except for when maintenance of the fiber bundle collecting device 10 is being performed. Therefore, when maintenance becomes necessary while the operation of the fiber bundle collecting device 10 is stopped, the maintenance can be performed without having to rotate the counter shaft 20 again.

[0068] (1-5) By using the mounting jig 83, the rotational position of the coupling 70 can be easily aligned. (Second embodiment) Next, a second embodiment of a fiber bundle collecting device for a spinning machine will be described with reference to Figures 11 to 14. In the second embodiment, detailed descriptions of the same parts as those in the first embodiment will be omitted.

[0069] As shown in FIG. 11, the spinning machine 100 includes a spindle drive device 111, a lifting unit 120, and a drafting device . The spindle drive device 111 drives the spindle 110 to wind up the fiber bundle F collected by the fiber bundle collecting device 10. The spindle drive device 111 includes a spindle drive motor 112, a drive pulley 113, a driven pulley 114, and a tangential belt 115 wound around both pulleys 113 and 114. The spindle 110 is driven by the spindle drive motor 112. The spindle drive motor 112 is a variable speed motor driven via an inverter 116. The control device 40 controls the inverter 116.

[0070] The lifting unit 120 raises and lowers the spindle 110. The lifting unit 120 includes a line shaft 121, a ring rail 122, a lappet angle (not shown) equipped with a snell wire 123, a poker pillar 124, a nut body 125, a lifting motor 126, and a driver 127. The line shaft 121 is rotatably disposed along the spindle row. A screw gear 121a is formed on the line shaft 121. The lifting motor 126 is connected to the line shaft 121 via a gear mechanism (not shown). The poker pillar 124 supports the ring rail 122 equipped with a ring 122a. A screw portion 124a is formed on the lower part of the poker pillar 124. The nut body 125 is threadedly engaged with the screw portion 124a and meshes with the screw gear 121a.

[0071] When the lifting motor 126 rotates in both forward and reverse directions to rotate the line shaft 121, the ring rail 122 is raised and lowered by the screw gear 121a, the nut body 125, and the screw portion 124a. The driver 127 drives the lifting motor 126. The control device 40 controls the driver 127.

[0072] During operation of the spinning machine 100, the control device 40 controls the inverter 116 and the driver 127 to control the driving of the spindle drive motor 112 and the lifting motor 126. The lifting unit 120 is driven by the driving of the lifting motor 126, and the ring rail 122 is repeatedly raised and lowered, and the spindle drive motor 112 is driven by the driving of the spindle drive device 111, and the spindle 110 is rotated. As a result, the fiber bundle F that has passed through the fiber bundle collecting device 10 is wound onto the bobbin B supported by the spindle 110.

[0073] The draft device 130 drafts the fiber bundle F. The draft device 130 includes a front roller 131, a first draft motor 132, a middle roller 133, a second draft motor 134, and a back bottom roller 135. The back bottom roller 135 is connected to the middle roller 133 via a gear train 136. The middle roller 133 includes an apron 133a. A first driver 132a drives the first draft motor 132. A second driver 134a drives the second draft motor 134. The control device 40 controls the first driver 132a and the second driver 134a. The first draft motor 132 and the second draft motor 134 drive the draft device 130. The draft device 130 is driven by the driving of the first draft motor 132 and the second draft motor 134.

[0074] The fiber bundle focusing device 10 is disposed in front of the draft device 130. The fiber bundle focusing device 10 focuses the fiber bundle F drafted by the draft device 130. The counter shaft drive motor 103 drives the fiber bundle focusing device 10. The counter shaft drive motor driver 128 drives the counter shaft drive motor 103. The control device 40 controls the counter shaft drive motor driver 128.

[0075] The spinning machine 100 includes an input section 44 . 12, the input unit 44 is provided with a physical button-type operation unit 41 and a start button 46. The operation unit 41 is operated to temporarily suspend or completely stop the operation of the spinning machine 100. The start button 46 is operated to start the stopped spinning machine 100.

[0076] A display unit 45 is arranged in the input unit 44. The display unit 45 displays an operation screen IM. The operation screen IM functions as a mode setting unit. The operation screen IM is a screen on which the operator performs an operation to select a first maintenance mode M1 or a second maintenance mode M2 ​​as the maintenance mode for the spinning machine 100. The operation screen IM displays an ON button B1 for selecting the first maintenance mode M1 and an OFF button B2 for deselecting the first maintenance mode M1.

[0077] When the ON button B1 is operated to select the first maintenance mode M1, the control device 40 sets the first maintenance mode M1 to be executable. When the OFF button B2 is operated to deselect the first maintenance mode M1, the control device 40 sets the normal stop mode M3 to be executable. Therefore, the operation screen IM, which is the mode setting section, selects the first maintenance mode M1 or the normal stop mode M3 and sets it to be executable.

[0078] The operation screen IM also displays an ON button B3 for selecting the second maintenance mode M2 ​​and an OFF button B4 for deselecting the second maintenance mode M2. When the ON button B3 is operated to select the second maintenance mode M2, the control device 40 sets the second maintenance mode M2 ​​to be executable. Therefore, the operation screen IM, which is the mode setting unit, selects the second maintenance mode M2 ​​and sets it to be executable. When the OFF button B4 is operated, the control device 40 sets the second maintenance mode M2 ​​to OFF. Therefore, the operation screen IM, which is the mode setting unit, selects the second maintenance mode M2 ​​and sets it to be executable.

[0079] The input unit 44 is provided with a parameter input unit 47. The parameter input unit 47 is a section where the operator inputs spinning parameters of the spinning machine 100. The parameter input unit 47 is of a dial type. Note that the parameter input unit 47 may be displayed on the operation screen IM, or may be a physical button other than a dial type.

[0080] 11 , during operation of the spinning machine 100, the control device 40 controls the spindle drive motor 112 via the inverter 116, and also controls each of the drivers 127, 128, 132a, and 134a to control the driving of each of the motors 103, 126, 132, and 134. During operation of the spinning machine 100, the control device 40 synchronizes and controls the fiber bundle collecting device 10, the spindle drive device 111, the lifting unit 120, and the draft device 130 in accordance with the spinning parameters input by the parameter input unit 47. Specifically, the control device 40 synchronizes and controls the motors 103, 112, 126, 132, and 134 in accordance with the spinning parameters input by the parameter input unit 47. Therefore, the spinning machine 100 includes a spindle drive motor 112 that drives a spindle 110 for winding the fiber bundle F collected by the fiber bundle collecting device 10. In this embodiment, the spinning machine 100 includes a first draft motor 132 and a second draft motor 134 that drive a draft device 130 that drafts the fiber bundle F, the spindle drive motor 112, and a lifting motor 126 that drives a lifting unit 120 that raises and lowers the spindle 110.

[0081] The control device 40 includes an operation screen IM as the mode setting unit, a synchronization control unit 401, a detection speed setting unit 402, and a display control unit 403. The display control unit 403 causes the display unit 45 to display the operation screen IM.

[0082] The synchronization control unit 401 controls the countershaft drive motor 103, the spindle drive motor 112, the lifting motor 126, the first draft motor 132, and the second draft motor 134 in synchronization with each other. Note that "synchronization" does not mean that the rotation speeds of the motors 103, 112, 126, 132, and 134 are all the same, but rather that the speed ratio is constant. In other words, "controlling in synchronization with each other" means that the synchronization control unit 401 controls the countershaft drive motor 103, the spindle drive motor 112, the lifting motor 126, the first draft motor 132, and the second draft motor 134 to be driven at appropriate rotation speeds so that the fiber bundle F can be spun in accordance with the spinning parameters input by the parameter input unit 47.

[0083] Furthermore, when executing the first maintenance mode M1, the synchronization control unit 401 drives the spindle drive motor 112 in synchronization with the counter shaft drive motor 103 in order to synchronously drive the fiber bundle collecting device 10 and the spindle drive device 111. The synchronization control unit 401 controls the counter shaft drive motor driver 128 and the inverter 116 to synchronize the spindle drive motor 112 with the counter shaft drive motor 103.

[0084] The detection speed setting unit 402 sets the detection speed V2c of the countershaft drive motor 103 and the detection speed V2s of the spindle drive motor 112 in the synchronization control unit 401. The detection speeds V2c and V2s are each a predetermined constant rotation speed. The detection speed V2c of the countershaft drive motor 103 is set to a sufficiently small value so that the rotation speed is slower than the rotation speed V1c of the countershaft drive motor 103 when a stop command is input from the operation unit 41. The detection speed V2s of the spindle drive motor 112 is set to a sufficiently small value so that the rotation speed is slower than the rotation speed V1s of the spindle drive motor 112 when a stop command is input from the operation unit 41. Furthermore, the detection speeds V2c and V2s are slow rotation speeds that allow the countershaft drive motor 103 and the spindle drive motor 112 to be stopped quickly. The lower the detection speed V2s of the spindle drive motor 112, the more preferable it is. An example of the detected speed V2s of the spindle drive motor 112 is the minimum rotation speed of the spindle drive motor 112 that can be controlled by the inverter 116.

[0085] The detected speed V2c of the countershaft drive motor 103 is slower than the detected speed V2s of the spindle drive motor 112. The detected speed V2c of the countershaft drive motor 103 is a rotational speed at which the countershaft 20 can be stopped at a predetermined rotational position with a small rotation after a detection signal is output by the rotational position detection unit 30. The predetermined rotational position is a position at which the coupling 70 stops within its operating range.

[0086] For example, when the rotational position detection unit 30 detects the leading edge in the rotational direction of one of the two edges of the detected surface 60c in the rotational direction of the countershaft 20, the rotational position detection unit 30 outputs a detection signal. If the countershaft 20 is rotating at the detection speed V2c, after the detection signal is output, the countershaft 20 stops immediately after the trailing edge in the rotational direction of the detected surface 60c passes the rotational position detection unit 30.

[0087] The detected speed V2c of the countershaft drive motor 103 and the detected speed V2s of the spindle drive motor 112 are stored in the storage unit of the control device 40. <First maintenance mode> The first maintenance mode M1 is executed during operation of the spinning machine 100. The first maintenance mode M1 is a mode in which the coupling 70 is positioned within the operating range when the spinning machine 100 is stopped during operation and the rotation of the countershaft 20 stops.

[0088] When the ON button B1 for the first maintenance mode M1 is operated on the operation screen IM of the display unit 45, the first maintenance mode M1 is set to be executable in the control device 40. When the first maintenance mode M1 is set to be executable, the detected speed setting unit 402 acquires the detected speed V2c of the countershaft drive motor 103 and the detected speed V2s of the spindle drive motor 112 from the storage unit and sets them in the synchronization control unit 401.

[0089] In the first maintenance mode M1, the synchronization control unit 401 drives each of the countershaft drive motor 103 and the spindle drive motor 112 to decelerate synchronously from the rotational speed during operation to the detected speeds V2c and V2s, and after deceleration, drives the countershaft drive motor 103 and the spindle drive motor 112 synchronously at the detected speeds V2c and V2s.

[0090] In the first maintenance mode M1, the synchronization control unit 401 stops driving the counter shaft drive motor 103 and the spindle drive motor 112 when the rotational position detection unit 30 detects the detection surface 60c. Then, in the first maintenance mode M1, when the synchronization control unit 401 stops driving the counter shaft drive motor 103, the drive of the fiber bundle collecting device 10 stops and the counter shaft 20 rotates slightly by inertia. Then, when the rotation of the counter shaft 20 stops, the coupling 70 is positioned at a position where the bolt 80 can be easily operated. In other words, the coupling 70 is positioned within the operation range.

[0091] Furthermore, when the synchronization control unit 401 stops driving the spindle drive motor 112, the spindle 110 rotates slightly due to inertia and then stops. Therefore, when the first maintenance mode M1 is executed, the countershaft 20 stops so that the coupling 70 is positioned within the operation range, and the spindle 110 immediately follows and stops.

[0092] <Normal stop mode> The normal stop mode M3 is executed while the spinning machine 100 is in operation. In normal stop mode M3, when a stop command is output from the operation unit 41, the synchronization control unit 401 synchronously decelerates the countershaft drive motor 103 and the spindle drive motor 112. The synchronization control unit 401 controls the countershaft drive motor driver 128 and also controls the inverter 116. Then, the synchronization control unit 401 controls the inverter 116 to stop the spindle drive motor 112, and then controls the countershaft drive motor driver 128 to stop the countershaft drive motor 103. In other words, in normal stop mode M3, the control device 40 causes the countershaft drive motor 103 to follow the spindle drive motor 112, thereby stopping the spindle drive motor 112 and the countershaft drive motor 103. When the OFF button B2 for the first maintenance mode M1 is operated on the operation screen IM of the display unit 45, the control device 40 is set to enable normal stop mode M3.

[0093] 13 is a graph showing the relationship between time and the rotation speed of the spindle 110 and the countershaft 20 in normal stop mode M3. The vertical axis of the graph shows the rotation speed [rpm] of the spindle 110 and the countershaft 20, and the horizontal axis of the graph shows time t. The solid line in FIG. 13 represents the spindle 110. The dashed dotted line in FIG. 13 represents the countershaft 20.

[0094] As shown in FIG. 13 , in the normal stop mode M3, when the operation unit 41 is operated to input a stop command at time t1 during operation of the spinning machine 100, the synchronization control unit 401 controls the inverter 116 to start decelerating the spindle drive motor 112 from the rotational speed V1s at that time t1. The synchronization control unit 401 also controls the countershaft drive motor driver 128 to start decelerating the countershaft drive motor 103 from the rotational speed V1c at that time t1. Then, the rotational speeds of the spindle 110 and the countershaft 20 gradually decrease. The synchronization control unit 401 then controls the countershaft drive motor driver 128 and the inverter 116 so that the countershaft drive motor 103 stops simultaneously or nearly simultaneously with the stop of the spindle drive motor 112. Then, the rotation of the countershaft 20 stops simultaneously or nearly simultaneously with the stop of the rotation of the spindle 110. That is, the rotation of the counter shaft 20 follows the rotation of the spindle 110 so that the fiber bundle F is not broken when the rotation of the spindle 110 stops.

[0095] [Operation of the second embodiment] 14 is a graph showing the relationship between time and the rotation speed of the spindle 110 and the countershaft 20 in the first maintenance mode M1. The vertical axis of the graph shows the rotation speed [rpm] of the spindle 110 and the countershaft 20, and the horizontal axis of the graph shows time t. The solid line in FIG. 14 represents the spindle 110. The dashed dotted line in FIG. 14 represents the countershaft 20.

[0096] As shown in FIG. 14 , in the spinning machine 100 in which the first maintenance mode M1 is set executable on the operation screen IM, when a stop command is output from the operation unit 41 at time t1 during operation, the synchronization control unit 401 controls the inverter 116 to start decelerating the spindle drive motor 112 from the rotational speed V1s at time t1. The synchronization control unit 401 also controls the countershaft drive motor driver 128 to start decelerating the countershaft drive motor 103 from the rotational speed V1c at time t1. Then, the rotational speeds of the spindle 110 and the countershaft 20 gradually decrease. At this time, the synchronization control unit 401 may synchronize and decelerate other motors in addition to the countershaft drive motor 103 and the spindle drive motor 112.

[0097] As the rotation speeds of the countershaft drive motor 103 and the spindle drive motor 112 decrease, the intervals between the detection signals output from the rotational position detector 30 gradually increase. Thereafter, when the rotation speed V1c of the countershaft drive motor 103 and the rotation speed V1s of the spindle drive motor 112 are decelerated to the detection speeds V2c and V2s of the motors 103 and 112, respectively, the synchronization controller 401 drives the countershaft drive motor 103 and the spindle drive motor 112 in synchronization with each other at the detection speeds V2c and V2s. Then, the countershaft drive motor 103 and the spindle drive motor 112 rotate at constant rotation speeds at their respective detection speeds V2c and V2s.

[0098] Then, after the countershaft drive motor 103 starts driving at the detected speed V2c, at time t2, a detection signal from the rotational position detector 30 is input to the control device 40 for the first time. The synchronization control unit 401 synchronizes the countershaft drive motor 103 and the spindle drive motor 112 and stops them. Then, the countershaft drive motor 103 and the spindle drive motor 112 rotate slightly due to inertia and then stop. The countershaft 20 and the spindle 110 also rotate slightly and then stop. When the rotation of the countershaft 20 and the spindle 110 stops, the coupling 70 stops so that it is located within the operating range.

[0099] According to the second embodiment, the following effects can be obtained. (2-1) When the first maintenance mode M1 is executed, the countershaft 20 is stopped based on the rotational position of the countershaft 20 to position the coupling 70 within the operation range, and the spindle 110 is stopped by following the countershaft 20. Then, the countershaft drive motor 103 and the spindle drive motor 112 are stopped after being decelerated to the detection speeds V2c and V2s, respectively, so that rotation due to inertia after stopping can be reduced. As a result, even if the countershaft 20 is stopped at a desired position, the difference in the relative rotation speed with the spindle 110 can be reduced, and breakage of the fiber bundle F can be suppressed.

[0100] (2-2) The detection speeds V2c and V2s are set to constant speeds. Therefore, while driving at the detection speeds V2c and V2s, the countershaft drive motor 103 and the spindle drive motor 112 can be stopped at a constant and slight rotation no matter when a detection signal is output from the rotational position detection unit 30. For example, it is possible to eliminate variations in the amount of rotation of the countershaft 20 and the spindle 110 depending on the timing at which the detection signal is output, such as when a detection signal is output while the countershaft drive motor 103 and the spindle drive motor 112 are gradually decelerating. As a result, breakage of the fiber bundle F can be suppressed when the first maintenance mode M1 is executed.

[0101] (2-3) The detected speeds V2c and V2s are rotational speeds at which the countershaft 20 stops with almost no rotation due to inertia after the countershaft drive motor 103 is stopped. Therefore, after the countershaft drive motor 103 is stopped, it is easy to position the coupling 70 within the operating range.

[0102] (2-4) The operation screen IM as a mode setting unit can be set to execute the first maintenance mode M1 or the normal stop mode M3 by operation on the operation screen IM. Therefore, for example, when maintenance of the fiber bundle collecting device 10 is not required, the spinning machine 100 can be stopped in the normal stop mode M3, and when maintenance of the fiber bundle collecting device 10 is required, the spinning machine 100 can be stopped in the first maintenance mode M1. Therefore, since the way in which the spinning machine 100 is stopped can be selected depending on the state of the fiber bundle collecting device 10, the needs of the operator regarding the use of the spinning machine 100 can be met.

[0103] (Third embodiment) Next, a third embodiment of a fiber bundle collecting device for a spinning machine will be described with reference to Fig. 15. In the third embodiment, detailed descriptions of parts that are the same as those in the first and second embodiments will be omitted.

[0104] In the third embodiment, the second maintenance mode M2 ​​will be described. <Second maintenance mode> The second maintenance mode M2 ​​is executed while the spinning machine 100 is stopped. That is, the second maintenance mode M2 ​​is executed when it becomes necessary to perform maintenance on the fiber bundle collecting device 10. The second maintenance mode M2 ​​is a mode in which the coupling 70 is positioned within the operation range when the stopped spinning machine 100 is started and then the spinning machine 100 stops and the rotation of the countershaft 20 stops.

[0105] When the ON button B3 for the second maintenance mode M2 ​​is operated on the operation screen IM of the display unit 45, the second maintenance mode M2 ​​is set to be executable in the control device 40. When the second maintenance mode M2 ​​is set to be executable, the detected speed setting unit 402 obtains the detected speeds V2c and V2s of the countershaft drive motor 103 and the spindle drive motor 112 from the storage unit and sets them in the synchronization control unit 401.

[0106] 15, in the third embodiment as well, the detected speeds V2c and V2s are the rotational speeds of the countershaft drive motor 103 and the spindle drive motor 112, and are rotational speeds set for the countershaft drive motor 103 and the spindle drive motor 112. The detected speeds V2c and V2s are set to sufficiently small values ​​so that they are rotational speeds lower than the rotational speeds V1c and V1s at the time when a stop command is input from the operation unit 41 in the spinning machine 100 during operation.

[0107] In the second maintenance mode M2, when the start button 46 is operated at time ts, an execution command for the second maintenance mode M2 ​​is input to the control device 40. Then, the synchronization control unit 401 starts the countershaft drive motor 103 and the spindle drive motor 112 and drives them synchronously. After starting the spinning machine 100, the synchronization control unit 401 synchronizes the countershaft drive motor 103 and the spindle drive motor 112 and drives them at detection speeds V2c and V2s. In the second maintenance mode M2, the synchronization control unit 401 stops driving the countershaft drive motor 103 and the spindle drive motor 112 at time t2 when the rotational position detection unit 30 detects the detection surface 60c. Then, in the second maintenance mode M2, when the synchronization control unit 401 stops driving the countershaft drive motor 103, driving of the fiber bundle collecting device 10 stops and the countershaft 20 rotates slightly by inertia. When the rotation of the countershaft 20 stops, the coupling 70 is positioned so that it is easy to operate the bolt 80. In other words, the coupling 70 is positioned within the operating range.

[0108] Furthermore, when the synchronization control unit 401 stops driving the spindle drive motor 112, the spindle 110 rotates slightly due to inertia and then stops. Therefore, when the second maintenance mode M2 ​​is executed, the countershaft 20 stops so that the coupling 70 is positioned within the operation range, and the spindle 110 immediately follows and stops.

[0109] 15 is a graph showing the relationship between time and the rotation speed of the spindle 110 and the countershaft 20 in the second maintenance mode M2. The vertical axis of the graph shows the rotation speed [rpm] of the spindle 110 and the countershaft 20, and the horizontal axis of the graph shows time t. The solid line in FIG. 15 represents the spindle 110. The dashed dotted line in FIG. 15 represents the countershaft 20.

[0110] [Operation of the third embodiment] 15, when the second maintenance mode M2 ​​is set to be executable on the operation screen IM in the spinning machine 100 after it has stopped in the normal stop mode M3, the start button 46 is operated at time ts to input a command to execute the second maintenance mode M2. The synchronization control unit 401 then drives the countershaft drive motor 103 and the spindle drive motor 112 in synchronization with each other and accelerates them at a constant acceleration rate up to the detected speeds V2c and V2s. When the rotational speeds of the countershaft drive motor 103 and the spindle drive motor 112 reach the detected speeds V2c and V2s, the synchronization control unit 401 drives the countershaft drive motor 103 and the spindle drive motor 112 in synchronization with each other at the detected speeds V2c and V2s.

[0111] After the countershaft drive motor 103 and the spindle drive motor 112 start to drive at the detected speeds V2c and V2s, at time t2, when a detection signal from the rotational position detector 30 is input to the control device 40 for the first time, the synchronization control unit 401 synchronizes the countershaft drive motor 103 and the spindle drive motor 112 and stops their drive. Then, the countershaft drive motor 103 and the spindle drive motor 112 rotate slightly due to inertia and then stop. The countershaft 20 and the spindle 110 also rotate slightly and then stop. When the rotation of the countershaft 20 and the spindle 110 stops, the coupling 70 stops and is positioned within the operating range.

[0112] According to the third embodiment, the following effects can be obtained. (3-1) By executing the second maintenance mode M2, the coupling 70 can be positioned within the operation range. Therefore, even if maintenance of the fiber bundle collecting device 10 is to be performed while the spinning machine 100 is stopped, by executing the second maintenance mode M2, the counter shaft 20 can be positioned at a position where maintenance can be easily performed. Furthermore, even if the counter shaft 20 is stopped at a desired position, the difference in the relative rotation speed with the spindle 110 can be reduced, so that breakage of the fiber bundle F can be suppressed when the second maintenance mode M2 ​​is executed.

[0113] Each embodiment can be modified as follows: Each embodiment and the following modifications can be combined with each other to the extent that no technical contradiction occurs. 16 , the detected surface 71c may be provided on the coupling 70. The detected surface 71c may be provided by forming a flat surface on the outer surface of the first connecting member 71, or may be provided by forming a flat surface on the outer surface of the second connecting member 72.

[0114] The detected portion does not have to be a surface such as the detected surface 60c. For example, it may be a groove or a hole provided in the countershaft 20 or the detection shaft 60. In short, as long as the rotational position detection unit 30 can detect the rotational position of the countershaft 20, the type of the rotational position detection unit 30 and the type of the detected portion may be changed.

[0115] When the fiber bundle collecting device 10 includes two counter shafts 20, only one coupling 70 may be provided. The coupling body 73 of the coupling 70 does not have to be divided into the first connecting member 71 and the second connecting member 72. For example, the coupling body 73 may be C-shaped when viewed in the axial direction.

[0116] The detection shaft 60 may be replaced with the countershaft 20. In this case, a detected portion is provided on the second connecting end 20c of the countershaft 20. The position of the detected portion in the longitudinal direction X may be set arbitrarily, such as at the end or the center of the longitudinal direction X. In this case, the position of the rotational position detection portion 30 is changed depending on the position of the detected portion.

[0117] The operating range may be changed as needed. For example, it may be set to a position where the bolt head housing 75 is rotated 45 degrees downward from the position shown in Figure 4. In short, the operating range may be changed as needed as long as the operator can operate the bolt 80.

[0118] The number of fiber bundle collecting devices 10 and the number of counter shafts 20 may be changed as appropriate. In this case, the spinning machine 100 may be provided with a middle head according to the number of fiber bundle collecting devices 10.

[0119] The fiber bundle collecting device 10 may include a plurality of detectable parts. In this case, a rotational position detecting unit 30 is provided for each of the detectable parts. For example, the rotational positions of the plurality of couplings 70 are made different. Then, a detectable part is provided on each counter shaft 20 or coupling 70, and a rotational position detecting unit 30 is provided for each detectable part.

[0120] The axial lengths of the first connecting end 20b and the second connecting end 20c of the countershaft 20 may be changed as appropriate. As long as the rotational position detection unit 30 can detect the detected surface 60c, the method of supporting the detection shaft 60, the method of arranging the rotational position detection unit 30, the position of the detected surface 60c, and the position of the rotational position detection unit 30 may be changed as appropriate.

[0121] In the first maintenance mode M1 and the second maintenance mode M2, the time at which the countershaft drive motor 103 and the spindle drive motor 112 are stopped during driving at the detection speeds V2c and V2s does not have to be the first time the rotational position detection unit 30 detects the detection surface 60c, and may be changed as desired. For example, the time may be the second time the rotational position detection unit 30 detects the detection surface 60c.

[0122] In the spinning machine 100, the draft device 130 and the lifting unit 120 may be driven by the spindle drive motor 112. In this case, the draft device 130 does not include the first draft motor 132 and the second draft motor 134, and the lifting unit 120 does not include the lifting motor 126. [Explanation of symbols]

[0123] F...fiber bundle, 10...fiber bundle concentrating device, 11...condensation unit, 12...rotating shaft, 13...delivery bottom roller, 14...suction section, 15...ventilation apron, 16...delivery top roller, 20...counter shaft, 20b...first connecting end, 20c...second connecting end, 30...rotational position detection section, 40...control device, 41...operation section, 60...detection shaft, 60c, 71c...detection surface as detected section, 70...coupling, 73...coupling body, 80...bolt, 103...counter shaft drive motor, 110...spindle, 112...spindle drive motor, 401...synchronization control section, 402...detection speed setting section, IM...operation screen as mode setting section.

Claims

1. a condensing unit that includes a delivery bottom roller that is provided on a rotating shaft and that conveys a fiber bundle, a suction section that exerts a suction effect on the fiber bundle, a ventilation apron that rotates along the suction section, and a delivery top roller that rotates together with the delivery bottom roller that comes into contact with the delivery bottom roller via the ventilation apron, and that collects the drafted fiber bundle; a plurality of counter shafts arranged in an axial direction of the counter shafts, the counter shafts rotating the rotary shaft; a countershaft drive motor that drives the countershaft; a coupling that connects the countershafts adjacent to each other in the axial direction and rotates integrally with the countershafts, The coupling connects the countershafts by fastening a coupling body that is spanned between the ends of the adjacent countershafts with a bolt, a detection target portion provided on the countershaft or the coupling for detecting a rotational position of the countershaft; a rotational position detection unit that detects the detected portion and outputs rotational position information of the countershaft; a control device that receives the rotational position information output by the rotational position detection unit and controls the countershaft drive motor; an operation unit that outputs a stop command to the control device to stop driving of the countershaft drive motor, a rotational position range of the coupling in which the bolt can be operated relative to the coupling body from the front is defined as an operation range of the coupling, the control device, when the stop command is input from the operation unit, controls the drive of the countershaft drive motor based on the rotational position information input from the rotational position detection unit so that the coupling is positioned within the operation range when the rotation of the countershaft is stopped.

2. The fiber bundle collecting device of a spinning machine according to claim 1, wherein the fiber bundle collecting device includes a plurality of the couplings, and all of the plurality of couplings are aligned in the rotational position.

3. A fiber bundle collecting device for a spinning machine as described in claim 1 or claim 2, wherein a detection shaft is connected to the counter shaft located at one end of the multiple counter shafts lined up, the detection shaft rotates as a counter shaft, the axial length of the detection shaft is shorter than the axial length of the counter shaft, and the detectable part is provided on the detection shaft.

4. the spinning machine includes a spindle drive motor that drives a spindle to wind the fiber bundle gathered by the fiber bundle gathering device, The control device a synchronization control unit that drives the countershaft drive motor and the spindle drive motor in synchronization with each other; a detection speed setting unit that sets a detection speed, which is a rotational speed of each of the countershaft drive motor and the spindle drive motor and which is set for each of the countershaft drive motor and the spindle drive motor, and which is a rotational speed that is slower than the rotational speed at the time when the stop command is input from the operation unit; a mode setting unit that sets a first maintenance mode in which the coupling is positioned within the operation range when the spinning machine in operation is stopped and the rotation of the countershaft is stopped, When the mode setting unit sets the first maintenance mode to be executable, if the stop command is input from the operation unit during operation of the spinning machine, 3. The fiber bundle collecting device of a spinning machine according to claim 1 or 2, wherein the synchronization control unit drives each of the counter shaft drive motor and the spindle drive motor to synchronously decelerate to the detection speed, drives the counter shaft drive motor and the spindle drive motor synchronously at the detection speed, and stops driving each of the counter shaft drive motor and the spindle drive motor when the rotational position detection unit detects the detection target portion.

5. the spinning machine includes a spindle drive motor that drives a spindle to wind the fiber bundle gathered by the fiber bundle gathering device, The control device a synchronization control unit that drives the countershaft drive motor and the spindle drive motor in synchronization with each other; a detection speed setting unit that sets a detection speed, which is a rotational speed of each of the countershaft drive motor and the spindle drive motor and which is set for each of the countershaft drive motor and the spindle drive motor, and which is a rotational speed that is slower than the rotational speed at the time when the stop command is input from the operation unit; a mode setting unit that sets a second maintenance mode in which the coupling is positioned within the operation range when the spinning machine is started and then stopped to stop rotation of the countershaft, so as to be executable; When the mode setting unit has set the second maintenance mode to be executable, and an execution command for the second maintenance mode is input to the spinning machine that is stopped, 3. The fiber bundle collecting device of a spinning machine according to claim 1, wherein the synchronization control unit drives the counter shaft drive motor and the spindle drive motor in synchronization with each other at the detected speed, and stops driving the counter shaft drive motor and the spindle drive motor when the rotational position detection unit detects the detected portion.

6. The fiber bundle collecting device of a spinning machine according to claim 4, wherein the mode setting unit sets a normal stop mode in which the counter shaft drive motor is caused to follow the spindle drive motor and the spindle drive motor and the counter shaft drive motor are stopped.

Images