Spinning machine

Abstract

To provide a spinning machine capable of reducing the amount of yarn to be removed by execution of a check mode.SOLUTION: A spinning machine 1 comprises a spinning unit 7, a unit control section 8, and a carriage control section 111. The spinning unit 7 has a spinning part 2 for spinning spun yarn Y1, a winding part 6 for winding the spun yarn Y1 supplied from the spinning part 2 to form a package P, a yarn splicing device 109 for performing yarn splicing of the spun yarn Y1 when the spun yarn Y1 is cut between the spinning part 2 and the winding part 6, and a storage device 4 for storing the spun yarn Y1 spun by the spinning part 2. When splicing the spun yarn Y1 cut between the spinning part 2 and the winding part 6, the unit control section 8 and the carriage control section 111 cut the spun yarn Y1 between the spinning part 2 and the storage device 4 after storing the spun yarn Y1 spun by the spinning part 2 in the storage device 4, and at a same time, execute a check mode performing the yarn splicing by the yarn splicing device 109.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a spinning machine that winds yarn to form a package. [Background technology]

[0002] A spinning machine is known that spins yarn to produce a spun yarn and winds the produced spun yarn to form a package. This spinning machine includes a spinning unit that produces the spun yarn, a winding unit that winds the spun yarn to form a package, and a storage device disposed between the spinning unit and the winding unit that stores the spun yarn. In the spinning machine, the yarn traveling between the spinning unit and the winding unit breaks during package formation. For this reason, the spinning machine is provided with a yarn splicing device that splices the cut yarn.

[0003] The above-mentioned spinning machine is operable in an operating mode (called a check mode) in which, when yarn joining is performed by the yarn joining device, an operator or the like can check the joined portion in order to check the state of the yarn joining by the yarn joining device (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-247108 Summary of the Invention [Problem to be solved by the invention]

[0005] In conventional spinning machines, when the check mode is being executed, spinning of the yarn by the spinning unit is stopped after the yarn joining device has completed the yarn joining. Therefore, spun yarn continues to be supplied from the spinning unit even while the yarn joining device is performing the yarn joining. When the check mode is executed, the joined yarn is removed from the spinning machine, but if spun yarn continues to be supplied from the spinning unit even while the yarn joining device is performing the yarn joining, a large amount of spun yarn is removed from the spinning machine unnecessarily.

[0006] An object of the present invention is to reduce the amount of yarn removed by executing a check mode in a spinning machine capable of executing a check mode for checking the state of a yarn spliced ​​by a yarn splicing device. [Means for solving the problem]

[0007] Below, several aspects will be described as means for solving the problems. These aspects can be arbitrarily combined as necessary. A spinning machine according to one aspect of the present invention includes a winding unit and a control unit. The winding unit has a spinning unit, a winding unit, a yarn joining device, and a storage device. The spinning unit spins yarn. The winding unit winds the yarn supplied from the spinning unit to form a package. The yarn joining device joins the yarn on the spinning unit side with the yarn on the package side when the yarn is broken between the spinning unit and the winding unit. The storage device is provided between the spinning unit and the yarn joining device, and stores the yarn spun by the spinning unit. The control unit controls the winding unit.

[0008] In the above-mentioned spinning machine, when joining a yarn that has been cut between the spinning unit and the winding unit, the control unit stores the yarn spun by the spinning unit in a storage device, and then executes a check mode in which the yarn between the spinning unit and the storage device is cut and simultaneously the yarn is joined by the yarn joining device.

[0009] In the above-described spinning machine, in the check mode executed when splicing a yarn cut between the spinning unit and the winding unit, the control unit stores the yarn spun by the spinning unit in the storage device, cuts the yarn between the spinning unit and the storage device, and simultaneously performs yarn splicing by the yarn splicing device. That is, when the check mode is executed, the control unit shortens the time between the timing of cutting the yarn between the spinning unit and the storage device and the timing of performing yarn splicing by the yarn splicing device. This reduces the amount of yarn supplied from the spinning unit and stored in the storage device when the check mode is executed. As a result, the amount of yarn removed when the check mode is executed can be reduced.

[0010] In the spinning machine, the yarn splicing device may be movable between a close position where it is close to a yarn travel path between the package and the spinning unit and a far position where it is far from the yarn travel path. In this case, when the check mode is executed, the control unit may cut the yarn between the spinning unit and the storage device when the yarn splicing device reaches the close position to perform yarn splicing. This makes it possible to stop the storage of yarn in the storage device before the amount of yarn stored in the storage device becomes excessive.

[0011] In the spinning machine described above, the control unit may cut the yarn between the spinning unit and the storage device before the yarn splicing by the yarn splicing device is completed when the check mode is executed, thereby stopping the storage of the yarn in the storage device before the amount of yarn stored in the storage device becomes excessive.

[0012] In the above spinning machine, the yarn joining device may have a yarn shifting lever. The yarn shifting lever shifts the yarn on the spinning unit side and the yarn on the package side by moving from a standby position to a working position. In this case, when the check mode is executed, the control unit may cut the yarn between the spinning unit and the storage device before the yarn shifting lever has completely moved from the standby position to the working position. This makes it possible to stop the storage of yarn in the storage device before the amount of yarn stored in the storage device becomes excessive.

[0013] The spinning machine may further include a capture unit and a change member. The capture unit moves between a capture position where it captures the yarn supplied from the spinning unit and a guide position where it guides the yarn to a position where the yarn splicing device will perform the yarn splicing. The change member moves between a first position where it sets the yarn travel path to a first travel path that causes the storage device to store the yarn, and a second position where it sets the yarn travel path to a second travel path that does not cause the storage device to store the yarn. In this case, the control unit may move the change member from the first position to the second position when the capture unit is positioned at the guide position during execution of the check mode. This prevents the yarn supplied from the spinning unit from being wasted in the storage device.

[0014] The spinning machine may further include a change member. The change member moves between a first position, where the yarn travel path is set to a first travel path that causes the storage device to store the yarn, and a second position, where the yarn travel path is set to a second travel path that does not cause the storage device to store the yarn. In this case, the control unit may move the change member from the second position to the first position when the check mode is executed, in addition to cutting the yarn between the spinning unit and the storage device. This reduces the amount of yarn stored in the storage device.

[0015] In the above spinning machine, the control unit may move the change member from the second position to the first position simultaneously with or after cutting the yarn between the spinning unit and the storage device when the check mode is executed, thereby reducing the amount of yarn stored in the storage device.

[0016] In the spinning machine, the control unit may cut the yarn between the spinning unit and the storage device by stopping the spinning of the yarn by the spinning unit, thereby stopping the supply of yarn from the spinning unit without providing a member for cutting the yarn.

[0017] In the above spinning machine, the spinning unit may include a draft device and a spinning device. The draft device causes a fiber bundle to travel. The spinning device spins the fiber bundle into a yarn. In this case, the control unit may stop the spinning of the yarn by stopping the draft device when the check mode is executed. This allows the yarn between the spinning unit and the storage device to be cut simply by stopping the draft device.

[0018] In the above spinning machine, the winding unit may have a rotating unit and a moving member. The rotating unit rotates while in contact with the package, thereby rotating the package. The moving member is capable of switching between a contact state in which the package and the rotating unit are in contact with each other and a separation state in which the package and the rotating unit are separated from each other by moving the rotating unit or the package. In this case, the control unit may keep the moving member in the contact state until the yarn joining device completes yarn joining. This prevents the package from rotating during yarn joining, thereby enabling stable yarn joining.

[0019] The spinning machine may further include a detection unit. The detection unit is provided between the yarn joining device and the winding unit, and detects the state of the joined portion of the yarn joined by the yarn joining device. In this case, the control unit may rotate the package using the winding unit and cause the detection unit to detect the joined portion. This allows the state of the yarn joining, which has conventionally been observed visually by a user, to be automatically observed by the detector.

[0020] In the above-described spinning machine, the control unit may cause the winding unit to repeatedly rotate the package forward and backward, and cause the detection unit to detect the yarn joint portion multiple times. This allows data obtained by observing the yarn joint portion multiple times, thereby making it possible to observe the state of the yarn joint more accurately.

[0021] The spinning machine may further include a suction and capture device that suctions and captures the yarn traveling between the storage device and the winding unit, thereby preventing the yarn that is cut between the storage device and the winding unit from sagging downward when the check mode is executed. [Effects of the Invention]

[0022] Since the amount of yarn supplied from the spinning unit and stored in the storage device during execution of the check mode can be reduced, the amount of yarn removed by execution of the check mode can be reduced. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] 4 is a flowchart showing the operation of the spinning machine. [Figure 4] 10 is a flowchart showing the yarn joining operation of a spun yarn in a normal mode. [Figure 5] 4 is a timing chart of the operation of each part during the yarn joining operation of spun yarn in the normal mode. [Figure 6] 10 is a flowchart showing the yarn joining operation of the spun yarn in the check mode. [Figure 7] 4 is a timing chart of the operation of each part during the yarn joining operation of the spun yarn in the check mode. DETAILED DESCRIPTION OF THE INVENTION

[0024] 1. First embodiment (1) Spinning machine The spinning machine 1 will be described below. In the following description, "upstream side" and "downstream side" respectively refer to the upstream side and downstream side in the running direction (yarn running direction) of the spun yarn (yarn) Y1, sliver Y2, or fiber bundle Y3 when the spun yarn (yarn) Y1 is being wound. As shown in FIG. 1, the spinning machine 1 includes a blower box 3, a prime mover box 5, multiple spinning units 7, and a yarn splicing cart 9. The blower box 3 contains a blower 11 that functions as a suction source. The prime mover box 5 contains a drive source, a central control device 13, a display unit 15, and an operation unit 17. The drive source provided in the prime mover box 5 includes an electric motor shared by multiple spinning units 7. FIG. 1 is a diagram showing the configuration of the spinning machine 1.

[0025] The central control device 13 centrally manages and controls each part of the spinning machine 1. The central control device 13 is connected to a unit control unit 8 (FIG. 2) provided in each spinning unit 7. In this embodiment, each spinning unit 7 is provided with a unit control unit 8, but a predetermined number (for example, two or four) of spinning units 7 may share one unit control unit 8.

[0026] The display unit 15 can display the settings for the spinning units 7 and / or information about the status of each spinning unit 7. The operation unit 17 is operated by the operator to set the spinning machine 1 and / or to select information to be displayed on the display unit 15. The display unit 15 and the operation unit 17 may be configured as a touch panel display.

[0027] The plurality of spinning units 7 are arranged in a predetermined direction. Each spinning unit 7 performs spinning using a spinning device 23 (to be described later) and the like. In this embodiment, the spinning machine 1 is configured as an air spinning machine.

[0028] When a yarn is broken in a spinning unit 7, the yarn splicing cart 9 moves to that spinning unit 7 and splices the broken yarn in that spinning unit 7. The yarn splicing cart 9 is provided so as to be movable relative to each spinning unit 7. One yarn splicing cart 9 is provided for each of the plurality of spinning units 7. Although one yarn splicing cart 9 is shown in FIG. 1, the spinning machine 1 may be provided with multiple yarn splicing carts 9. As shown in FIG. 1, the spinning machine 1 is provided with a rail 101. The rail 101 is arranged to extend along the direction in which the plurality of spinning units 7 are lined up. The yarn splicing cart 9 is configured to be able to travel on the rail 101. This allows the yarn splicing cart 9 to move relative to the plurality of spinning units 7.

[0029] (2) Spinning unit The spinning unit 7 will be described below with reference to Fig. 2. Fig. 2 is a diagram showing the configuration of the spinning unit 7. The spinning unit 7 includes a spinning section 2, a storage device 4, a winding section 6, and a unit control section 8. The spinning section 2, the storage device 4, and the winding section 6 are arranged in this order from upstream to downstream in the running direction of the spun yarn Y1, etc.

[0030] The spinning section 2 spins yarn to form a spun yarn Y1 and supplies the spun yarn Y1 to the winding section 6 to be wound into a package. The spinning section 2 has a draft device 21 and a spinning device 23. The draft device 21 is provided above the spinning unit 7. The draft device 21 has a plurality of draft roller pairs. Each draft roller pair is composed of two draft rollers.

[0031] Specifically, the draft device 21 includes four draft roller pairs: a back roller pair 21a, a third roller pair 21b, a middle roller pair 21c, and a front roller pair 21d, arranged in this order from the upstream side to the downstream side.

[0032] Each of the four draft roller pairs has a drive roller and a driven roller facing each other. A drive source such as a motor is provided for each drive roller of the four draft roller pairs. Each drive roller is driven to rotate around the axis of the drive roller by the drive source. The driven roller of each draft roller pair is rotatable around the axis of the driven roller via a bearing or the like (not shown). Some or all of the four draft roller pairs may be driven by a common drive source. Furthermore, some or all of the four draft roller pairs may be driven by a common drive source for multiple spinning units 7.

[0033] The draft device 21 sandwiches the sliver Y2 supplied from the sliver supply unit 97 between the draft rollers of each draft roller pair (between a drive roller and a driven roller) and runs the sliver Y2, stretching it to a predetermined fiber amount to generate a fiber bundle Y3. Furthermore, the draft device 21 can stop the production of the spun yarn Y1 by the spinning device 23 by stopping the drafting by the draft device 21 (for example, rotation of the back roller pair 21a) and stopping the supply of the sliver Y2. In other words, by stopping the draft device 21, the spun yarn Y1 running between the spinning unit 2 and the winding unit 6 can be cut.

[0034] The sliver supply section 97 is arranged upstream of the draft device 21. A can, which is a container for accommodating the sliver Y2, is arranged in the sliver supply section 97. A sliver sensor 99 for detecting the presence or absence of the sliver Y2 is provided between the draft device 21 and the sliver supply section 97. The sliver sensor 99 can detect the presence of the sliver Y2 being supplied to the draft device 21. Note that the sliver sensor 99 is not necessarily required.

[0035] In this embodiment, the spinning device 23 is configured as an air spinning device. The spinning device 23 applies a swirling air current to the fiber bundle Y3 produced by the draft device 21 to add twist and produce the spun yarn Y1. The spinning device 23 is located downstream of the draft device 21. A spinning section 2 consisting of the draft device 21 and the spinning device 23 supplies the spun yarn Y1. The spun yarn Y1 produced in the spinning section 2 runs from the spinning section 2 towards the winding section 6 and is wound by the winding section 6. A package P is formed by winding the spun yarn Y1. A yarn path along which the spun yarn Y1 runs is formed between the spinning section 2 and the winding section 6.

[0036] The storage device 4 pulls out and temporarily stores the spun yarn Y1 produced in the spinning unit 2. The storage device 4 is disposed midway along the yarn path formed between the spinning unit 2 and the winding unit 6. Specifically, the storage device 4 is disposed downstream of the spinning device 23.

[0037] The storage device 4 includes a yarn storage roller 41, an electric motor 43, a yarn hooking member 45, a changing member 47, and a stored yarn amount detection sensor 49. The yarn storage roller 41 is driven to rotate by the electric motor 43. The yarn storage roller 41 winds the spun yarn Y1 around its outer circumferential surface and temporarily stores the spun yarn Y1. By rotating at a predetermined rotational speed with the spun yarn Y1 wound around its outer circumferential surface, the yarn storage roller 41 can pull out the spun yarn Y1 from the spinning unit 2 at a predetermined speed.

[0038] The yarn hooking member 45 can hook the spun yarn Y1. With the spun yarn Y1 hooked, the yarn hooking member 45 rotates integrally with the yarn pooling roller 41, thereby guiding the spun yarn Y1 to the outer circumferential surface of the yarn pooling roller 41. In other words, when the spun yarn Y1 is hooked on the yarn hooking member 45, the spun yarn Y1 is wound onto the yarn pooling roller 41.

[0039] The change member 47 is disposed near the yarn pooling roller 41. The change member 47 is capable of performing a yarn removing operation to remove the spun yarn Y1 from the yarn hooking member 45. The change member 47 is configured, for example, as an L-shaped member, and one end thereof is rotatably supported.

[0040] The change member 47 can rotate to move between a first position and a second position that is higher than the first position. In Fig. 2, the change member 47 is located at the first position. When the change member 47 is located at the first position, if the spun yarn Y1 is caught on the yarn hooking member 45, the change member 47 leaves the spun yarn Y1 hooked on the yarn hooking member 45. In other words, when located at the first position, the change member 47 sets the travel path of the spun yarn Y1 to a first travel path that causes the yarn pooling roller 41 to pool the spun yarn Y1.

[0041] Meanwhile, in the process of moving from the first position to the second position, the changing member 47 passes through a space downstream of the yarn pooling roller 41. At this time, if the spun yarn Y1 is caught on the yarn hooking member 45, the changing member 47 acts on (contacts) the spun yarn Y1, causing the spun yarn Y1 to be released from the yarn hooking member 45. As a result, the spun yarn Y1 is no longer pooled on the yarn pooling roller 41. In other words, the changing member 47, which is in the second position, changes the travel path of the spun yarn Y1 to a second travel path that causes the yarn pooling roller 41 to pool the spun yarn Y1.

[0042] In this embodiment, the change member 47 is provided in each spinning unit 7, and an independent drive unit (motor, air cylinder, etc.) is provided for each change member 47. Therefore, the change member 47 can operate independently of the change members 47 of the other spinning units 7.

[0043] The yarn storage amount detection sensor 49 detects the amount of stored yarn on the yarn storage roller 41. The yarn storage amount detection sensor 49 is disposed so as to face an appropriate position on the outer circumferential surface of the yarn storage roller 41. The yarn storage amount detection sensor 49 detects the presence or absence of spun yarn Y1 at this position. The yarn storage amount detection sensor 49 transmits a detected detection signal to the unit control unit 8. Based on this detection signal, the unit control unit 8 can determine whether the stored yarn amount is equal to or greater than a predetermined amount.

[0044] The storage device 4 functions as a kind of buffer for the spun yarn Y1 by temporarily storing the spun yarn Y1 on the outer peripheral surface of the yarn storage roller 41. This makes it possible to eliminate problems (such as slack in the spun yarn Y1) caused by a mismatch between the spinning speed in the spinning unit 2 and the winding speed (the running speed of the spun yarn Y1 wound into a package P, which will be described later) for some reason.

[0045] The winding unit 6 is disposed downstream of the storage device 4 and winds the spun yarn Y1 to form a package P. The winding unit 6 includes a rotating unit 61, a moving member 63, and a traverse guide 65. The rotating unit 61 rotates while in contact with the outer peripheral surface of the bobbin B or the package P, thereby rotating the package P. The rotating unit 61 is rotated by the drive of an electric motor. The rotating unit 61 can rotate forward in the direction in which the spun yarn Y1 is wound onto the package P, and reverse in the opposite direction.

[0046] The moving member 63 is rotatably supported around a support shaft 67, and can rotatably support a bobbin B (package P) for winding the spun yarn Y1. The moving member 63 rotates around the support shaft 67 to move the bobbin B (package P), thereby switching between a contact state in which the package P (bobbin B) is in contact with the rotating part 61, and a separation state in which the package P (bobbin B) is separated from the rotating part 61. When the package P and the rotating part 61 are in contact, the package P rotates in accordance with the rotation of the rotating part 61. On the other hand, when the package P and the rotating part 61 are in a separation state, the package P does not rotate in accordance with the rotation of the rotating part 61.

[0047] The traverse guide 65 can be moved back and forth along the length direction of the package P by a predetermined driving means (for example, a motor). By rotating the rotating part 61 while the rotating part 61 is in contact with the package P (bobbin B) to rotate the package P, and by moving the spun yarn Y1 back and forth along the length direction of the package P by the traverse guide 65, the spun yarn Y1 can be wound onto the package P while traversing.

[0048] The unit control unit 8 is composed of a CPU, a storage device (RAM, ROM, HDD, SSD, etc.), and various interfaces, and controls the spinning unit 7. Part or all of the control of the spinning unit 7 by the unit control unit 8 may be realized by a program stored in a storage device that constitutes the unit control unit 8 and executable by the unit control unit 8. Furthermore, part of the control of the spinning unit 7 may be realized by hardware that constitutes the unit control unit 8.

[0049] The spinning unit 7 is equipped with a suction and capturing device 20. The suction and capturing device 20 is provided between the storage device 4 and the winding section 6. The suction and capturing device 20 suctions and captures the spun yarn Y1 traveling between the storage device 4 and the winding section 6. Specifically, when the spun yarn Y1 is cut, the suction and capturing device 20 suctions and captures the spun yarn Y1 on the package P side. Even more specifically, by rotating the yarn storage roller 41 while stopping the rotation of the package P, the spun yarn Y1 unwound from the yarn storage roller 41 is sucked and captured by the suction and capturing device 20. When the yarn splicing cart 9 performs work on the spinning unit 7, the suction and capturing device 20 is located upstream of the yarn splicing device 109 of the yarn splicing cart 9.

[0050] The suction capture device 20 includes a suction pipe 20a. A suction port 20b is formed at the tip of the suction pipe 20a. The suction port 20b opens toward the middle of the yarn path of the spun yarn Y1. The suction pipe 20a is connected to a suction source such as a blower 11 via a pipe or the like. This allows a suction airflow to be generated at the suction port 20b.

[0051] The suction and capturing device 20 is provided with a yarn capture detection sensor 20c. The yarn capture detection sensor 20c is located immediately downstream of the suction and capturing device 20. The yarn capture detection sensor 20c can detect whether the spun yarn Y1 on the package P side has been successfully captured by the suction and capturing device 20. The yarn capture detection sensor 20c detects the presence or absence of the spun yarn Y1 immediately downstream of the suction and capturing device 20, and transmits a detection signal indicating the presence or absence of the spun yarn Y1 to the unit control unit 8. The unit control unit 8 can determine whether the suction and capturing device 20 has been successful based on the detection signal from the yarn capture detection sensor 20c. It is also possible to determine whether the suction and capturing device 20 has been successful based on the detection result of a yarn running sensor 90, which will be described later, without providing the yarn capture detection sensor 20c.

[0052] The suction capturing device 20 may be provided with a shutter 20d. The shutter 20d switches between generating a suction force at the suction port 20b to cause the spun yarn Y1 to be captured by the suction capturing device 20, and not generating a suction force at the suction port 20b to cause the spun yarn Y1 to be captured by the suction capturing device 20. The shutter 20d is disposed, for example, between the suction port 20b and a portion of the suction capturing device 20 that is downstream of the suction port 20b in the air flow direction. The shutter 20d can be configured, for example, by an opening / closing mechanism having a plate-shaped member.

[0053] The shutter 20d can be opened and closed under the control of the unit control unit 8. By closing the shutter 20d, no suction force is generated at the suction port 20b, and the spun yarn Y1 cannot be captured by the suction and capturing device 20. On the other hand, by opening the shutter 20d, a suction force is generated at the suction port 20b, and the spun yarn Y1 can be captured by the suction and capturing device 20.

[0054] The spinning unit 7 has a yarn monitoring device 30 and a spinning sensor 50 between the spinning device 23 and the storage device 4. The yarn monitoring device 30 and the spinning sensor 50 detect the state of the spun yarn Y1 upstream (on the spinning section 2 side) of the storage device 4. The spun yarn Y1 produced in the spinning section 2 passes through the yarn monitoring device 30 and the spinning sensor 50 before being stored in the storage device 4.

[0055] The yarn monitoring device 30 monitors the quality of the traveling spun yarn Y1 and detects yarn defects in the spun yarn Y1. Examples of yarn defects include an abnormality in the thickness of the spun yarn Y1 and / or foreign matter contained in the spun yarn Y1. When the yarn monitoring device 30 detects a yarn defect in the spun yarn Y1, it transmits a yarn defect detection signal to the unit control unit 8. For example, an optical sensor or a capacitance sensor can be used as the yarn monitoring device 30.

[0056] The spinning sensor 50 is disposed immediately downstream of the yarn monitoring device 30. The spinning sensor 50 detects the tension of the spun yarn Y1 between the spinning unit 2 and the storage device 4. The spinning sensor 50 transmits a detection signal of the detected tension to the unit control unit 8. By monitoring the tension detected by the spinning sensor 50, the unit control unit 8 can determine abnormalities such as weak yarn. The spinning sensor 50 can also be omitted.

[0057] In order to maintain yarn quality, it is preferable to remove yarn defects and abnormal portions. Based on the detection results of at least one of the yarn monitoring device 30 and the spinning sensor 50, the unit control unit 8 determines whether to cut the spun yarn Y1 in order to remove the detected yarn defect and / or abnormal portion. The unit control unit 8 controls the spinning unit 2 to stop spinning. Specifically, the spun yarn Y1 is cut by stopping the drafting by the draft device 21 (rotation of the back roller pair 21a). This allows the spun yarn Y1 to be cut without providing a cutter or the like in the spinning unit 7.

[0058] The spinning unit 7 is provided with a waxing device 70 and a yarn travel sensor 90 between the suction and capturing device 20 and the winding section 6. The spun yarn Y1 that has passed through the storage device 4 passes through the waxing device 70 and near the yarn travel sensor 90 before being wound into a package P in the winding section 6.

[0059] The waxing device 70 can hold wax to be applied to the spun yarn Y1. The waxing device 70 can apply wax to the spun yarn Y1 traveling between the storage device 4 and the winding section 6. The yarn travel sensor 90 is disposed near the downstream side of the waxing device 70. The yarn travel sensor 90 can detect whether the spun yarn Y1 is traveling at a predetermined position in the yarn path, in other words, the presence or absence of the spun yarn Y1. The yarn travel sensor 90 transmits a detection signal indicating the presence or absence of the spun yarn Y1 to the unit control section 8.

[0060] (3) Yarn splicing cart The yarn splicing carriage 9 will be described below with reference to Figures 1 and 2. The yarn splicing carriage 9 travels to a working position corresponding to the spinning unit 7 where the spun yarn Y1 has been cut, and performs a yarn splicing process in that spinning unit 7. The yarn splicing carriage 9 includes traveling wheels 103, a first catching part 105, a second catching part 107, a yarn splicing device 109, a detection part 110, and a carriage control part 111.

[0061] The traveling wheels 103 are configured to be rotatably driven by a driving means. When the traveling wheels 103 are driven, the yarn splicing cart 9 can travel relative to each of the plurality of spinning units 7.

[0062] The first catching part 105 is a member having a pipe-like portion and is also called a suction pipe. An opening is formed at the tip of the first catching part 105. The first catching part 105 is connected to a suction source such as a blower 11. Therefore, a suction airflow can be generated at the tip of the first catching part 105. The first catching part 105 is supported so as to be rotatable. By rotating the first catching part 105, the first catching part 105 can move between a catching position where it catches the spun yarn Y1 supplied from the spinning part 2 and a guiding position where it guides the spun yarn Y1 to a position where the yarn joining is performed by the yarn joining device 109.

[0063] The second catching part 107 is a member having a pipe-like portion and is also called a suction mouth. An opening is formed at the tip 117 of the second catching part 107. The second catching part 107 is connected to a suction source such as a blower 11. Therefore, a suction airflow can be generated at the tip 117 of the second catching part 107. The second catching part 107 is supported so as to be rotatable. By rotating the second catching part 107, the tip 117 can be moved to a position close to the retraction part 6 (close position) or a position retracted from the retraction part 6 (retracted position).

[0064] When the spun yarn Y1 breaks, the first catching unit 105 rotates to the catching position, causing its tip to move in a direction approaching the spinning device 23 and catch the yarn end of the spun yarn Y1 on the spinning unit 2 side while approaching the spinning device 23. The first catching unit 105 then rotates to the guiding position, causing the tip of the first catching unit 105 to move in a direction away from the spinning device 23 and the spun yarn Y1 caught by the first catching unit 105 to be guided to a position where it can be joined by the yarn joining device 109.

[0065] Meanwhile, as the second catching part 107 rotates to the approach position, its tip 117 moves in a direction approaching the winding part 6 and catches the yarn end of the spun yarn Y1 on the winding part 6 side at a position approaching the winding part 6. The second catching part 107 then rotates to the retracted position. As a result, the tip 117 of the second catching part 107 moves in a direction away from the winding part 6, and the spun yarn Y1 caught by the second catching part 107 is guided to a position where it can be joined by the yarn joining device 109. Note that when the spun yarn Y1 has been suction-caught by the suction-catch device 20, there is no need to drive the second catching part 107.

[0066] After the spun yarn Y1 is broken, the yarn joining device 109 joins the spun yarn Y1 on the spinning unit 2 side guided by the first catching unit 105 with the spun yarn Y1 captured by the suction and capturing device 20 or the spun yarn Y1 on the package P side guided by the second catching unit 107. In this embodiment, the yarn joining device 109 is a splicer device that joins yarn ends by twisting them together using a swirling airflow. The yarn joining device 109 is not limited to the splicer device described above, and a mechanical knotter, for example, can also be used.

[0067] The yarn joining device 109 is movable between a close position where it is close to the travel path of the spun yarn Y1 between the package P and the spinning unit 2, and a separated position where it is separated from the travel path of the spun yarn Y1. The yarn joining device 109 moves to the close position when performing yarn joining, and is otherwise located at the separated position. The travel path of the spun yarn Y1 means the path along which the spun yarn Y1 travels when forming the package P. In addition, the yarn joining device 109 can move to the close position regardless of whether the spun yarn Y1 is present on the travel path of the spun yarn Y1 or not.

[0068] The yarn splicing device 109 has a yarn shifting lever 109a. The yarn shifting lever 109a is rotatable around an axis. By rotating, the yarn shifting lever 109a can move between a working position where the spun yarn Y1 on the spinning unit 2 side and the spun yarn Y1 on the package P side, which are guided into the yarn splicing device 109, are shifted toward the inside of the yarn splicing device 109, and a standby position where the spun yarn Y1 is not shifted toward the inside.

[0069] When performing yarn splicing, the yarn splicing device 109 moves from the separated position to the approach position, the yarn shifting lever 109a moves to the working position to shift the spun yarn Y1 on the spinning unit 2 side and the spun yarn Y1 on the package P side toward the inside of the yarn splicing device 109, and then the yarn splicing is performed by the yarn splicing device 109.

[0070] The detection unit 110 is a sensor that detects the state of the spliced ​​portion (referred to as the spliced ​​portion) of the spun yarn Y1 spliced ​​by the yarn splicing device 109. The detection unit 110 is provided between the yarn splicing device 109 and the winding unit 6. Specifically, the detection unit 110 is provided downstream of the yarn splicing device 109 in the yarn splicing cart 9. The detection unit 110 outputs the measurement results of the state of the spliced ​​portion (for example, the thickness of the spliced ​​portion) to the unit control unit 8. The detection unit 110 can be, for example, an optical sensor or a capacitance sensor.

[0071] The carriage control unit 111 is a computer system configured with a CPU, storage devices (RAM, ROM, HDD, SSD, etc.), and various interfaces. The carriage control unit 111 controls the operation of each unit of the yarn splicing carriage 9, thereby controlling the yarn splicing process performed by the yarn splicing carriage 9. Some or all of the control of the carriage control unit 111 may be realized by a program stored in a storage device of the carriage control unit 111 and executable by the carriage control unit 111, or may be realized by hardware constituting the carriage control unit 111.

[0072] The yarn splicing cart 9 normally waits at an appropriate position on the rail 101. When a break occurs in the spun yarn Y1 in any of the spinning units 7, the yarn splicing cart 9 moves to the spinning unit 7 where the break occurred. When the yarn splicing cart 9 is in a standby state, it does not generate a suction airflow in either the first catching portion 105 or the second catching portion 107. This makes it possible to save air consumption in each of the first catching portion 105 and the second catching portion 107.

[0073] (4) Operation of the spinning machine (4-1) Overview The operation of the spinning machine 1 having the above configuration will be described below. The spinning unit 7 can operate in two modes: "normal mode" and "check mode." The normal mode is an operating mode in which the spun yarn Y1 is produced and wound to form a package P. The check mode is a mode in which the condition of the spliced ​​portion when the cut spun yarn Y1 (the spun yarn Y1 on the spinning section 2 side and the spun yarn Y1 on the package P side) is spliced ​​is checked. The operator can set which mode the spinning unit 7 will operate in before operation.

[0074] (4-2) Operation in normal mode The operation of the spinning machine 1 in normal mode will be described below with reference to FIG. 3. Specifically, the operation of forming a package P in a specific spinning unit 7 of the spinning machine 1 will be described. FIG. 3 is a flowchart showing the operation of the spinning machine 1. First, it is assumed that at the start, the winding section 6 is winding the spun yarn Y1. In other words, the yarn between the spinning device 23 and the winding section 6 is connected. In this state, the spinning section 2 of the spinning unit 7 produces the spun yarn Y1 (step S1). Specifically, the unit control section 8 rotates each roller pair of the draft device 21 to produce a fiber bundle Y3 from the sliver Y2 supplied from the sliver supply section 97. This fiber bundle Y3 is supplied to the spinning device 23 by the draft device 21. The spinning device 23 produces the spun yarn Y1 from the supplied fiber bundle Y3. At this time, the change member 47 of the storage device 4 is in the first position, so the spun yarn Y1 produced by the spinning device 23 is wound onto the yarn storage roller 41 of the storage device 4. Furthermore, as the yarn storage roller 41 rotates, the spun yarn Y1 wound onto the yarn storage roller 41 is pulled out toward the winding section 6.

[0075] The winding section 6 winds the spun yarn Y1, which has been unwound from the yarn storage roller 41, onto a bobbin B (package P) to form the package P (step S2). Specifically, the unit control section 8 causes the moving member 63 of the winding section 6 to bring the bobbin B (package P) into contact with the rotating section 61, and rotates the rotating section 61 to rotate the bobbin B (package P). While rotating the bobbin B (package P), the unit control section 8 causes the spun yarn Y1 to move back and forth using the traverse guide 65, thereby winding the spun yarn Y1 onto the bobbin B (package P).

[0076] During winding of the spun yarn Y1, the unit control unit 8 determines whether or not the spun yarn Y1 has been cut for some reason (step S3). The unit control unit 8 determines that the spun yarn Y1 has been cut, for example, when the yarn running sensor 90 detects the absence of the spun yarn Y1, or when the yarn monitoring device 30 detects a yarn defect and stops drafting by the draft device 21, thereby cutting the spun yarn Y1, and the yarn monitoring device 30 detects the absence of the spun yarn Y1.

[0077] If the spun yarn Y1 is not broken ("No" in step S3), the unit control section 8 continues forming the package P (i.e., returns to step S2). On the other hand, if a break in the spun yarn Y1 is detected ("Yes" in step S3), yarn splicing is performed (step S4), and after the yarn splicing, winding of the spun yarn Y1 onto the bobbin B / package P is resumed (i.e., returns to step S2). The package P is formed by repeatedly performing the above steps S1 to S4.

[0078] (4-3) Yarn splicing operation in normal mode 4 and 5, the yarn joining operation of the spun yarn Y1 in the normal mode in step S4 will be described below. FIG. 4 is a flowchart showing the yarn joining operation of the spun yarn Y1 in the normal mode. FIG. 5 is a timing chart showing the operation of each part in the yarn joining operation of the spun yarn Y1 in the normal mode. When breakage of the spun yarn Y1 is detected, the unit control unit 8 stops the production of the spun yarn Y1 (step S501). Specifically, the unit control unit 8 stops the drafting by the draft device 21 and stops the supply of the fiber bundle Y3 to the spinning device 23, thereby stopping the production of the spun yarn Y1. Note that if the drafting by the draft device 21 is stopped in the above step S3, it is not necessary to perform step S501.

[0079] When the unit control unit 8 determines that the spun yarn Y1 has been cut, it notifies the carriage control unit 111 that the spun yarn Y1 has been cut. Upon receiving the notification, the carriage control unit 111 moves the yarn splicing carriage 9 to the spinning unit 7 where the cut spun yarn Y1 has occurred, and performs yarn splicing between the spun yarn Y1 on the package P (winding unit 6) side of the cut spun yarn Y1 and the spun yarn Y1 on the spinning unit 2 side. Specifically, the yarn splicing is performed as follows.

[0080] First, the spun yarn Y1 on the package P side is captured, and the captured spun yarn Y1 is guided to a position where it can be spliced ​​by the yarn joining device 109 (step S502). Specifically, at time t1 in Fig. 5, the carriage control unit 111 moves the second catching unit 107 from the retracted position to the approaching position. The second catching unit 107, having moved to the approaching position, approaches the package P formed by the winding unit 6. The second catching unit 107 sucks and captures the spun yarn Y1 on the package P side by using the suction force generated at the tip 117. At this time, the rotating unit 61 of the winding unit 6 rotates in the direction opposite to the winding direction in which the spun yarn Y1 is wound, making it easier to pull out the spun yarn Y1 from the package P.

[0081] Once the second catching unit 107 has caught the spun yarn Y1, the carriage control unit 111 moves the second catching unit 107 from the approach position to the retracted position. This allows the spun yarn Y1 caught by the second catching unit 107 to be guided to a position where it can be spliced ​​by the yarn joining device 109. Whether or not the second catching unit 107 has caught the spun yarn Y1 can be detected, for example, by a sensor. If the spun yarn Y1 has been sucked and caught by the suction and capturing device 20, it is not necessary to perform step S502.

[0082] The first catching unit 105 also catches the spun yarn Y1 on the spinning unit 2 side and guides the caught spun yarn Y1 to a position where it can be spliced ​​by the yarn joining device 109. Specifically, first, at time t2, the carriage control unit 111 moves the first catching unit 105 from the guide position to the capturing position (step S503). Having moved to the capturing position, the first catching unit 105 approaches the spinning device 23 of the spinning unit 2. Thereafter, at time t3, the carriage control unit 111 resumes rotation of the back roller pair 21a and resumes production of the spun yarn Y1 (step S504). As a result, the first catching unit 105 can suck and capture the spun yarn Y1 produced by the spinning unit 2 by the suction force generated at the tip.

[0083] Once the first catching unit 105 has caught the spun yarn Y1, the carriage control unit 111 moves the first catching unit 105 from the catching position to the guiding position (step S505). This allows the spun yarn Y1 caught by the first catching unit 105 to be guided to a position where it can be spliced ​​by the yarn splicing device 109. Whether the first catching unit 105 has caught the spun yarn Y1 can be detected by, for example, a sensor.

[0084] When step S505 is performed, the change member 47 of the storage device 4 is in the first position. Therefore, while the first catching part 105, which has caught the spun yarn Y1, is being moved from the catching position to the guiding position, the spun yarn Y1 caught by the first catching part 105 is caught by the yarn hooking member 45 of the storage device 4 and is wound onto the yarn storage roller 41.

[0085] The unit control unit 8 moves the change member 47 from the first position to the second position at the same time that the first catching part 105 is positioned at the guide position (step S506). Specifically, at time t4, when the first catching part 105, which has caught the spun yarn Y1, is about to reach the guide position, the unit control unit 8 moves the change member 47 from the first position to the second position. While the change member 47 moves from the first position to the second position, the spun yarn Y1 that had been caught on the yarn hooking member 45 is released, and winding of the spun yarn Y1 onto the yarn pooling roller 41 stops.

[0086] In this way, while the first catching part 105 is being moved from the catching position to the guiding position, the spun yarn Y1 caught by the first catching part 105 is wound onto the yarn pooling roller 41. Then, by moving the changing member 47 from the first position to the second position, a small amount of spun yarn Y1 is wound onto the yarn pooling roller 41, as shown in Fig. 5. In other words, a small amount of spun yarn Y1 is pooled in the pooling device 4.

[0087] Thereafter, at time t5, the carriage control unit 111 moves the yarn joining device 109 from the separated position to the close position (step S507). At time t6, the unit control unit 8 moves the change member 47 from the second position to the first position (step S508). While the change member 47 is moving from the second position to the first position, winding of the spun yarn Y1 onto the yarn storage roller 41 (i.e., storage of the spun yarn Y1 in the storage device 4) is resumed.

[0088] After the yarn joining device 109 moves to the approach position, it starts joining the spun yarn Y1 on the package P side with the spun yarn Y1 on the spinning unit 2 side (step S509). Specifically, at time t7, the carriage control unit 111 moves the yarn shifting lever 109a of the yarn joining device 109 from the standby position to the working position to move the spun yarn Y1 on the package P side and the spun yarn Y1 on the spinning unit 2 side toward the yarn joining device 109. Thereafter, the carriage control unit 111 controls the yarn joining device 109 to join the spun yarn Y1 on the package P side with the spun yarn Y1 on the spinning unit 2 side.

[0089] When the spun yarn Y1 on the package P side and the spun yarn Y1 on the spinning unit 2 side are spliced, the yarn splicing ends (step S510). Specifically, at time t8 after the yarn splicing is completed, the carriage control unit 111 moves the yarn shifting lever 109a from the working position to the standby position, and then at time t9, moves the yarn splicing device 109 from the approach position to the separated position. After this, winding of the spun yarn Y1 onto the package P is resumed.

[0090] At least during the execution of the above-described yarn splicing, the unit control section 8 keeps the moving member 63 of the winding section 6 in contact with the package P (i.e., keeps the rotating section 61 in contact with the package P) until the yarn splicing device 109 completes the yarn splicing. This prevents the package P from rotating during the yarn splicing, allowing for stable yarn splicing.

[0091] 5, in the normal mode, the spinning unit 2 continues to produce the spun yarn Y1 after it starts producing the spun yarn Y1 in order to have the first catching unit 105 catch the spun yarn Y1 (i.e., after time t3). Therefore, the spun yarn Y1 is wound onto the yarn storage roller 41 even after the change member 47 is moved from the second position to the first position at time t6 until the yarn splicing is completed. As a result, the amount of spun yarn Y1 stored in the storage device 4 is A1 from the start of the normal mode until the end of yarn splicing (immediately before the formation of the package P begins).

[0092] (4-4) Check mode operation 6 and 7, the yarn joining operation of the spun yarn Y1 in the check mode will be described below. FIG. 6 is a flowchart showing the yarn joining operation of the spun yarn Y1 in the check mode. FIG. 7 is a timing chart showing the operation of each part in the yarn joining operation of the spun yarn Y1 in the check mode. First, at the start of the check mode, the spun yarn Y1 is cut between the spinning unit 2 and the package P. Furthermore, the spinning unit 2 is not producing the spun yarn Y1. In this state, the check mode is started. In the check mode, the operations up to the start of yarn joining are the same as those in the normal mode. That is, steps S601 to S607 in the flowchart of FIG. 6 are the same as steps S502 to S508 in the flowchart of FIG. 4, respectively. Therefore, the explanation of steps S601 to S607 will be omitted, and the explanation will begin with the start of yarn joining (step S608).

[0093] In yarn joining in the check mode, the spun yarn Y1 spun by the spinning unit 2 is stored in the storage device 4, and then the spun yarn Y1 between the spinning unit 2 and the storage device 4 is cut, and at the same time, yarn joining is performed by the yarn joining device 109. In other words, the spun yarn Y1 between the spinning unit 2 and the storage device 4 is cut before the yarn joining by the yarn joining device 109 is completed.

[0094] Specifically, the unit control unit 8 cuts the spun yarn Y1 between the spinning unit 2 and the storage device 4 in conjunction with moving the change member 47 from the second position to the first position in step S608. More specifically, the unit control unit 8 cuts the spun yarn Y1 between the spinning unit 2 and the storage device 4 in conjunction with the yarn joining device 109 reaching the approach position. Here, "in conjunction with A" means a short period of time before or after the execution timing of A.

[0095] More specifically, at time t5, the yarn joining device 109 is moved from the separated position to the close position (step S606), and at time t6, the change member 47 is moved from the second position to the first position (step S607), after which yarn joining is started (step S608). At time t7, the yarn shifting lever 109a of the yarn joining device 109 starts to move from the standby position to the working position, and at time T (FIG. 7) before the movement of the yarn shifting lever 109a to the working position is completed, the unit control unit 8 cuts the spun yarn Y1 between the spinning unit 2 and the storage device 4 (step S609).

[0096] The interval between the time when the change member 47 is moved from the second position to the first position at time t6 and when it reaches the first position and the time when the spun yarn Y1 between the spinning unit 2 and the storage device 4 is cut at time T can be, for example, about 100 ms.

[0097] Specifically, at time T, the unit control unit 8 stops the draft by the draft device 21, stops the supply of the fiber bundle Y3 to the spinning device 23, and stops the spinning of yarn by the spinning unit 2 (production of the spun yarn Y1 by the spinning device 23), thereby cutting the spun yarn Y1 between the spinning unit 2 and the storage device 4. The unit control unit 8 notifies the carriage control unit 111 that the spun yarn Y1 has been cut. After the spun yarn Y1 between the spinning unit 2 and the storage device 4 has been cut, when the yarn shifting lever 109a reaches the working position, the carriage control unit 111 controls the yarn joining device 109 to join the spun yarn Y1 on the package P side with the spun yarn Y1 on the spinning unit 2 side.

[0098] After the spun yarn Y1 between the spinning unit 2 and the storage device 4 is cut, the yarn end of the cut spun yarn Y1 is caught by the suction catching device 20. Meanwhile, the yarn end of the spun yarn Y1 on the package P side is connected to the package P. At this time, the package P and the rotating unit 61 are in contact with each other.

[0099] When the spun yarn Y1 on the package P side and the spun yarn Y1 on the spinning unit 2 side are spliced, the yarn splicing is completed (step S610). Specifically, at time t8 after the yarn splicing is completed, the carriage control unit 111 moves the yarn shifting lever 109a from the working position to the standby position, and then at time t9, moves the yarn splicing device 109 from the approach position to the separated position.

[0100] After completing the yarn splicing as described above, the state of the spliced ​​portion of the spun yarn Y1 (the spliced ​​portion) is confirmed (step S611). Specifically, the unit control unit 8 holds one end of the spliced ​​spun yarn Y1 with the suction and capturing device 20, holds the other end of the spun yarn Y1 with the package P, and rotates the rotating unit 61 to rotate the package P that is in contact with the rotating unit 61, moving the spliced ​​portion of the spun yarn Y1 to the position of the detection unit 110 on the yarn splicing carriage 9, and causes the detection unit 110 to detect the spliced ​​portion.

[0101] At this time, the unit control section 8 causes the rotation section 61 to repeatedly rotate the package P forward and backward, causing the detection section 110 to detect the spliced ​​portion of the spun yarn Y1 multiple times. This allows the detection section 110 to measure the spliced ​​portion multiple times, making it possible to observe the state of the spliced ​​portion more accurately.

[0102] The user or the like can observe the state of the yarn spliced ​​portion by analyzing the measurement results obtained by the detection unit 110. Note that the user or the like can also observe the state of the yarn spliced ​​portion by visually inspecting the yarn spliced ​​portion.

[0103] After acquiring the data on the state of the yarn spliced ​​portion, the check mode is executed a predetermined number of times. The predetermined number of times may be one or more. After executing the check mode, the spinning unit 7 is stopped. By checking the data on the state of the yarn spliced ​​portion, the operator can change the settings of the yarn splicing device 109 as necessary.

[0104] In this way, in the check mode, the spun yarn Y1 spun by the spinning unit 2 is stored in the storage device 4, and then the spun yarn Y1 between the spinning unit 2 and the storage device 4 is cut, and simultaneously, the yarn joining is performed by the yarn joining device 109. In other words, the time between the timing of cutting the spun yarn Y1 between the spinning unit 2 and the storage device 4 and the timing of yarn joining by the yarn joining device 109 is shortened. This reduces the amount of spun yarn Y1 supplied from the spinning unit 2 and stored in the storage device 4. Specifically, as shown in FIG. 7, the amount of spun yarn Y1 stored at the end of the check mode is A2, which is less than the amount A1 stored at the end of the normal mode. As a result, the amount of spun yarn Y1 spun when the check mode is executed can be reduced. The spun yarn Y1 spun in the check mode is used to check the state of the yarn joining, and therefore it is not desired that it be mixed into the package P, which is the final product. For this reason, it is preferable to reduce the amount of spun yarn Y1 spun in the check mode.

[0105] 2. Other Embodiments Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible within the scope of the gist of the invention. In particular, the multiple embodiments and modifications described in this specification can be arbitrarily combined as necessary. (A) At least one of the processing content, execution order, and duration of each step in the flowcharts shown in Figures 4 and 6 may be changed as appropriate without departing from the spirit of the invention. In addition, some of the steps may be executed redundantly.

[0106] (B) In the first embodiment described above, when the check mode is executed, the spun yarn Y1 between the spinning unit 2 and the storage device 4 is cut immediately (for example, 100 ms later) after the change member 47 is moved from the second position to the first position in step S608. However, the timing of cutting the spun yarn Y1 is not limited to this. In order to reduce the amount of storage in the storage device 4, as long as the timing of moving the change member 47 to the first position and the timing of cutting the spun yarn Y1 are short, it is possible to decide which is executed first. Furthermore, the time interval between these timings can also be set arbitrarily.

[0107] That is, when the check mode is executed, the unit control unit 8 may move the change member from the second position to the first position simultaneously with cutting the yarn between the spinning unit 2 and the storage device 4 or after cutting the yarn between the spinning unit 2 and the storage device 4. This allows the amount of yarn stored by the storage device 4 to be further reduced.

[0108] (C) In the first embodiment described above, the rotating unit 61 of the winding unit 6 was capable of rotating forward and reverse independently. However, this is not limited to this. The winding unit 6 may have a rotating unit for forward rotation and a rotating unit for reverse rotation separately. For example, in cases where the drive means for the rotating unit for forward rotation is shared by multiple spinning units 7 and the rotating unit for forward rotation cannot be rotated in reverse independently, each spinning unit 7 may be provided with an independent rotating unit for reverse rotation, allowing each spinning unit 7 to rotate the package P forward / reverse independently.

[0109] (D) In ​​the first embodiment described above, the function of splicing the cut yarn in the spinning unit 7 is provided in the yarn splicing cart 9. However, this is not limited to this, and the spinning unit 7 may have the function of splicing the yarn. In other words, the spinning unit 7 may have the first catching unit 105, the second catching unit 107, the yarn splicing device 109, and the detection unit 110.

[0110] (E) In the check mode, the spinning unit 7 may be stopped after yarn splicing, and the operator may visually check the spliced ​​portion. After this check, the operator removes the spun yarn Y1 stored on the yarn storage roller 41. The smaller the amount of spun yarn Y1 stored on the yarn storage roller 41 after executing the check mode, the easier it is for the operator to remove the spun yarn Y1 from the yarn storage roller 41. On the other hand, if the amount of spun yarn Y1 stored on the yarn storage roller 41 is too small, insufficient tension will be applied to the spun yarn Y1, and the yarn may come off the yarn storage roller 41 when the next yarn splice is performed, which could result in a failed yarn splice.

[0111] Therefore, when executing the check mode again after executing the check mode or when executing the normal mode to perform yarn splicing, the operator may simply wind the cut spun yarn Y1 around the package P, or may have the suction and catching device 20 catch the yarn end of the spun yarn Y1. Alternatively, the operator may tear off the spliced ​​portion and then have the suction and catching device 20 catch the yarn end of the spun yarn Y1, or may tear off the spun yarn Y1 near the package P.

[0112] 3. Notes (1) A spinning machine (for example, spinning machine 1) includes a winding unit (for example, spinning unit 7) and a control unit (for example, unit control unit 8, carriage control unit 111). The winding unit includes a spinning unit (for example, spinning unit 2), a winding unit (for example, winding unit 6), a yarn joining device (for example, yarn joining device 109), and a storage device (for example, storage device 4). The spinning unit spins a yarn (for example, spun yarn Y1). The winding unit winds the yarn supplied from the spinning unit to form a package (for example, package P). If the yarn is broken between the spinning unit and the winding unit, the yarn joining device joins the yarn on the spinning unit side with the yarn on the package side. The storage device is provided between the spinning unit and the yarn joining device, and stores the yarn spun by the spinning unit. The control unit controls the winding unit.

[0113] In the above-mentioned spinning machine, when joining a yarn that has been cut between the spinning unit and the winding unit, the control unit stores the yarn spun by the spinning unit in a storage device, and then executes a check mode in which the yarn between the spinning unit and the storage device is cut and simultaneously the yarn is joined by the yarn joining device.

[0114] In the above-described spinning machine, in the check mode executed when splicing a yarn cut between the spinning unit and the winding unit, the control unit stores the yarn spun by the spinning unit in the storage device, cuts the yarn between the spinning unit and the storage device, and simultaneously performs yarn splicing by the yarn splicing device. That is, when the check mode is executed, the control unit shortens the time between the timing of cutting the yarn between the spinning unit and the storage device and the timing of performing yarn splicing by the yarn splicing device. This reduces the amount of yarn supplied from the spinning unit and stored in the storage device when the check mode is executed. As a result, the amount of yarn removed when the check mode is executed can be reduced.

[0115] (2) In the spinning machine described in (1) above, the yarn joining device may be movable between a close position where it is close to a yarn travel path between the package and the spinning unit and a separate position where it is separate from the yarn travel path. In this case, when the check mode is executed, the control unit may cut the yarn between the spinning unit and the storage device when the yarn joining device reaches the close position to perform yarn joining. This makes it possible to stop the storage of yarn in the storage device before the amount of yarn stored in the storage device becomes excessive.

[0116] (3) In the spinning machine of (1) or (2) above, the control unit may cut the yarn between the spinning unit and the storage device before the yarn splicing by the yarn splicing device is completed when the check mode is executed, thereby stopping the storage of the yarn in the storage device before the amount of yarn stored in the storage device becomes excessive.

[0117] (4) In any of the spinning machines (1) to (3) above, the yarn joining device may have a yarn shifting lever (e.g., yarn shifting lever 109a). The yarn shifting lever shifts the yarn on the spinning unit side and the yarn on the package side by moving from the standby position to the working position. In this case, when the check mode is executed, the control unit may cut the yarn between the spinning unit and the storage device before the yarn shifting lever has completely moved from the standby position to the working position. This makes it possible to stop the storage of yarn in the storage device before the amount of yarn stored in the storage device becomes excessive.

[0118] (5) The spinning machine according to any one of (1) to (4) above may further include a catching unit (e.g., first catching unit 105) and a changing member (e.g., changing member 47). The catching unit moves between a catching position where it catches the yarn supplied from the spinning unit and a guide position where it guides the yarn to a position where the yarn splicing device will perform the yarn splicing. The changing member moves between a first position where it sets the yarn travel path to a first travel path where the storage device stores the yarn, and a second position where it sets the yarn travel path to a second travel path where the storage device does not store the yarn. In this case, the control unit may move the changing member from the first position to the second position when the catching unit is positioned at the guide position during execution of the check mode. This prevents the yarn supplied from the spinning unit from being wasted in the storage device.

[0119] (6) The spinning machine according to any one of (1) to (5) above may further include a change member. The change member moves between a first position where the yarn travel path is set to a first travel path that causes the storage device to store the yarn, and a second position where the yarn travel path is set to a second travel path that does not cause the storage device to store the yarn. In this case, the control unit may move the change member from the second position to the first position when the check mode is executed, in addition to cutting the yarn between the spinning unit and the storage device. This reduces the amount of yarn stored in the storage device.

[0120] (7) In the spinning machine of (6) above, the control unit may move the change member from the second position to the first position simultaneously with or after the yarn is cut between the spinning unit and the storage device when the check mode is executed, thereby reducing the amount of yarn stored in the storage device.

[0121] (8) In the spinning machine of any one of (1) to (7) above, the control unit may cut the yarn between the spinning unit and the storage device by stopping the spinning of the yarn by the spinning unit, thereby stopping the supply of yarn from the spinning unit without providing a member for cutting the yarn.

[0122] (9) In the spinning machine of (8) above, the spinning unit may have a draft device (e.g., draft device 21) and a spinning device (e.g., spinning device 23). The draft device causes a fiber bundle to travel. The spinning device spins the fiber bundle into a yarn. In this case, the control unit may stop the spinning of the yarn by stopping the draft device when the check mode is executed. This allows the yarn between the spinning unit and the storage device to be cut by the simple method of stopping the draft device.

[0123] (10) In the spinning machine of any one of (1) to (9) above, the winding unit may have a rotating unit (for example, the rotating unit 61) and a moving member (for example, the moving member 63). The rotating unit rotates while in contact with the package, thereby rotating the package. The moving member is capable of switching between a contact state in which the package and the rotating unit are in contact with each other and a separation state in which the package and the rotating unit are separated from each other by moving the rotating unit or the package. In this case, the control unit may keep the moving member in the contact state until the yarn joining device completes yarn joining. This prevents the package from rotating during yarn joining, thereby enabling stable yarn joining.

[0124] (11) Any of the spinning machines described above in (1) to (10) may further include a detection unit (for example, the detection unit 110). The detection unit is provided between the yarn joining device and the winding unit, and detects the state of the joined portion of the yarn joined by the yarn joining device. In this case, the control unit may rotate the package using the winding unit, and cause the detection unit to detect the joined portion. This allows the state of the yarn joining, which has conventionally been visually checked by a user or the like, to be automatically observed by the detector.

[0125] (12) In the spinning machine of (11) above, the control unit may cause the winding unit to repeatedly rotate the package forward and backward, and cause the detection unit to detect the yarn splice portion multiple times. This allows data obtained by observing the yarn splice portion multiple times, making it possible to observe the state of the yarn splice more accurately.

[0126] (13) The spinning machine according to any one of (1) to (12) above may further include a suction and capture device (for example, suction and capture device 20). The suction and capture device sucks and captures the yarn traveling between the storage device and the winding unit. This prevents the yarn that is cut between the storage device and the winding unit from sagging downward when the check mode is executed. [Industrial Applicability]

[0127] The present invention can be widely applied to spinning machines that wind yarn to form a package. [Explanation of symbols]

[0128] 1: Spinning machine 2: Spinning section 3: Blower box 4: Storage device 5: Engine box 6: Winding section 7: Spinning unit 8: Unit control section 9: Yarn splicing cart 11: Blower 13: Central control unit 15: Display section 17:Operation section 20: Suction capture device 20a: Suction pipe 20b: Suction port 20c: Yarn catch detection sensor 20d: Shutter 21: Draft device 21a: Back roller pair 21b: Third Roller Pair 21c: Middle Roller vs. 21d: Front roller pair 23: Spinning device 30: Yarn monitoring device 41: Yarn storage roller 43: Electric motor 45: Yarn hooking member 47: Modified parts 49: Yarn storage amount detection sensor 50: Spinning sensor 61: Rotating part 63: Moving parts 65: Traverse Guide 67: Support shaft 70: Waxing device 90: Yarn travel sensor 97: Sliver supply section 99: Sliver sensor 101: Rail 103: Running wheel 105: First capture unit 107: Second capture unit 109: Yarn splicing device 109a: Thread guide lever 110: Detection unit 111: Carriage control unit 117: Tip B: Bobbin P: Package Y1: Spun yarn Y2: Sliver Y3: Fiber bundle

Claims

1. a spinning section for spinning yarn; a winding unit that winds the yarn supplied from the spinning unit to form a package; a yarn splicing device that splices the yarn on the spinning unit side with the yarn on the package side when the yarn is cut between the spinning unit and the winding unit; a storage device provided between the spinning unit and the yarn joining device, for storing the yarn spun by the spinning unit; a winding unit having a control unit that controls the winding unit; Equipped with The control unit When splicing a yarn cut between the spinning unit and the winding unit, a check mode is executed in which the yarn spun by the spinning unit is stored in the storage device, the yarn between the spinning unit and the storage device is cut, and at the same time, yarn splicing is performed by the yarn splicing device. Spinning machine.

2. the yarn joining device is movable between a close position where it is close to a yarn traveling path between the package and the spinning unit and a separate position where it is separated from the yarn traveling path, 2. The spinning machine according to claim 1, wherein the control unit cuts the yarn between the spinning unit and the storage device when the yarn joining device reaches the approach position to perform yarn joining during execution of the check mode.

3. The spinning machine according to claim 1 or 2, wherein the control unit, when executing the check mode, cuts the yarn between the spinning unit and the storage device before the yarn joining device completes the yarn joining.

4. the yarn joining device has a yarn shifting lever that shifts the yarn on the spinning unit side and the yarn on the package side by moving from a standby position to a working position, The spinning machine according to any one of claims 1 to 3, wherein the control unit, when executing the check mode, cuts the yarn between the spinning unit and the storage device before the movement of the yarn shifting lever from the standby position to the working position is completed.

5. a catcher that moves to a catch position where the yarn supplied from the spinning unit is caught, and a guide position where the yarn is guided to a position where the yarn is spliced ​​by the yarn splicing device; a change member that moves between a first position where the yarn travel path is a first travel path that causes the storage device to store the yarn and a second position where the yarn travel path is a second travel path that does not cause the storage device to store the yarn, A spinning machine according to any one of claims 1 to 4, wherein the control unit moves the change member from the first position to the second position in conjunction with the capture portion being positioned at the guide position when the check mode is executed.

6. The yarn storage device further includes a change member that moves between a first position where the yarn travel path is a first travel path that causes the storage device to store the yarn and a second position where the yarn travel path is a second travel path that does not cause the storage device to store the yarn, A spinning machine according to any one of claims 1 to 5, wherein the control unit moves the change member from the second position to the first position in conjunction with cutting the yarn between the spinning unit and the storage device when the check mode is executed.

7. The spinning machine described in claim 6, wherein the control unit, when executing the check mode, moves the change member from the second position to the first position simultaneously with cutting of the yarn between the spinning unit and the storage device or after cutting of the yarn between the spinning unit and the storage device.

8. The spinning machine according to any one of claims 1 to 7, wherein the control unit cuts the yarn between the spinning unit and the storage device by stopping the spinning of the yarn by the spinning unit.

9. the spinning unit includes a drafting device that runs a fiber bundle and a spinning device that spins the fiber bundle into a yarn, The spinning machine according to claim 8 , wherein the control unit stops the draft device to stop spinning of the yarn when the check mode is executed.

10. The winding section a rotating unit that rotates in contact with the package to rotate the package; a moving member that can switch between a contact state in which the package and the rotating unit are in contact with each other and a separation state in which the package and the rotating unit are separated by moving the rotating unit or the package, The spinning machine according to any one of claims 1 to 9, wherein the control unit keeps the moving members in the contact state until the yarn joining device completes yarn joining.

11. a detection unit that is provided between the yarn joining device and the winding unit and that detects a state of a joined portion of the yarn joined by the yarn joining device, The spinning machine according to any one of claims 1 to 10, wherein the control unit rotates the package using the winding unit and causes the detection unit to detect the yarn joint portion.

12. The spinning machine according to claim 11, wherein the control unit causes the winding unit to repeatedly rotate the package in a forward and reverse direction, thereby causing the detection unit to detect the yarn spliced ​​portion a plurality of times.

13. The spinning machine according to any one of claims 1 to 12, further comprising a suction and capture device that suctions and captures the yarn traveling between the storage device and the winding section.

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