CN112779634A

CN112779634A - Spinning machine

Info

Publication number: CN112779634A
Application number: CN202011076814.5A
Authority: CN
Inventors: 野村浩平; 岩田真治
Original assignee: Murata Machinery Ltd
Current assignee: Murata Machinery Ltd
Priority date: 2019-11-07
Filing date: 2020-10-10
Publication date: 2021-05-11
Also published as: JP2021075812A

Abstract

The invention provides a spinning machine which can remove yarn with proper length under the condition of removing defects generated on the yarn in a package. A spinning machine (1) is provided with: an air spinning device (7) that twists a fiber bundle (F) to produce a yarn (Y); a winding device (13) that winds the yarn (Y) generated by the air-jet spinning device (7) to form a package (P); a suction nozzle (28) for removing defects generated in the yarn (Y) in the package (P); and a machine body control device (15) for adjusting the length of the yarn (Y) to be removed by the suction nozzle (28) according to the spinning conditions.

Description

Spinning machine

Technical Field

One aspect of the invention relates to a spinning machine.

Background

For example, a spinning machine is known as shown in japanese patent application laid-open No. 2015-224397, which includes: a spinning device for twisting the fiber bundle to produce a yarn; and a winding device that winds the yarn generated by the spinning device to form a package. In such a spinning machine, for example, when a defect is detected in the yarn produced by the spinning device, the yarn is cut, and the yarn having a predetermined length is removed from the yarn end (the end on the outer peripheral surface side of the package) in the package, thereby removing the defect generated in the yarn.

However, in the above-described conventional spinning machine, a predetermined and constant length of yarn is always removed. Therefore, there are cases where an excess length of yarn is removed to remove the defect, or where the defect remains even after the yarn is removed. In the former case, the yarn is discarded excessively, so that the amount of wasted yarn is increased, and an extra time corresponding to the wasted amount is required, so that the operation of the spinning machine becomes inefficient. In the latter case, the defect generated in the yarn cannot be removed, and the defect may be mixed into the package.

Disclosure of Invention

An object of one aspect of the present invention is to provide a spinning machine capable of removing a yarn of an appropriate length when a defect occurring in the yarn is removed by removing the yarn of a removed length from an end of the yarn in a package.

A spinning machine according to one aspect of the present invention includes: a spinning device for twisting the fiber bundle to produce a yarn; a winding device that winds the yarn generated by the spinning device to form a package; a removing device for removing a defect generated in the yarn in the package; the control section adjusts a removal length, which is a length of the yarn removed from the yarn end in the package by the removal device, according to the spinning conditions.

The inventors of the present application have found the following: the length from the yarn end to the defective portion in the package varies depending on, for example, spinning conditions such as physical properties of the yarn. Therefore, in the spinning machine of the present application, the removal length is adjusted according to the spinning conditions. That is, in this configuration, when the spinning conditions are changed, the removal length is also changed. For example, if the spinning machine stores an appropriate removal length according to the spinning conditions based on the past operation data and/or experimental values, the yarn having an appropriate length can be removed according to the spinning conditions. As a result, when the defect generated in the yarn in the package is removed, the yarn having an appropriate length can be removed.

The spinning machine according to one aspect of the present invention may further include a yarn monitoring device that is disposed between the spinning device and the winding device, monitors a state of the yarn wound in the package, and cuts the yarn based on the state of the yarn monitored by the yarn monitoring device. In the spinning machine having this configuration, the yarn having an appropriate length can be removed from the yarn that is cut when the defect is detected by the monitoring of the yarn monitoring device in order to remove the defect.

In the spinning machine according to one aspect of the present invention, the control unit may control the removal length to be removed by the removal device in accordance with the spinning conditions in the case of a short defect in which the time from the start of detection of the defect detected by the monitoring of the yarn monitoring device to the cutting is shorter than a predetermined time, and the removal length to be removed by the removal device in the case of a long defect in which the time from the start of detection of the defect to the cutting is longer than the predetermined time. When the yarn is cut, the shape of the yarn end may be uncertain depending on the cutting mode. That is, the length from the detection of the defect to the yarn end becomes unstable. Therefore, by adjusting the removal length according to the spinning conditions only in the case of removing a short defect having a short length, it is possible to remove a yarn having an appropriate length. In the case of a long defect, since the removal length is long, even if the shape of the yarn end is uncertain, the influence thereof is small, and therefore, it is sufficient to remove the predetermined length.

In the spinning machine according to one aspect of the present invention, the control unit may cut the yarn by stopping the spinning operation of the spinning device. In this configuration, even when the yarn is cut by controlling the spinning device, the yarn of an appropriate length can be removed.

The spinning machine according to one aspect of the present invention may further include a draft device that drafts the fiber bundle supplied to the spinning device, and the control unit may cut the yarn by stopping the drafting by the draft device. In this configuration, even when the yarn is cut by controlling the draft device, the yarn of an appropriate length can be removed.

In the spinning machine according to one aspect of the present invention, when the removal length cannot be obtained from the spinning conditions, the control unit may adjust the removal length based on a difference between a detection time of the defect detected by monitoring of the yarn monitoring device and a detection time of the yarn end. In this configuration, even if a situation occurs in which the removal length cannot be adjusted according to the spinning conditions, the removal length can be adjusted based on the monitoring result of the yarn monitoring device.

The spinning machine according to one aspect of the present invention may further include a cutting device that is disposed between the spinning device and the winding device and cuts the yarn wound in the package, and the control unit may control the cutting device to cut the yarn. In this configuration, even when a cutting device for cutting the yarn is provided, the yarn of an appropriate length can be removed.

In the spinning machine according to one aspect of the present invention, the spinning condition may be at least one of a physical property of the yarn, a thickness of the yarn, and a speed of winding the yarn around the package. The inventors of the present application have found the following: the length from the end of the yarn to the defective portion in the package varies depending on, in particular, the physical properties of the yarn, the thickness of the yarn, and the speed at which the yarn is wound into the package. In this configuration, the length of the yarn from the end of the yarn in the package to the defective portion can be appropriately calculated, and therefore the yarn having an appropriate length can be removed.

In the spinning machine according to one aspect of the present invention, the control unit may increase the removal length as the mixing ratio of the polyester increases. In this configuration, even when the yarn length from the end of the yarn in the package to the defective portion tends to be long, the defective portion can be appropriately removed from the yarn.

In the spinning machine according to one aspect of the present invention, the control unit may increase the removal length as the thickness of the yarn becomes smaller. In this configuration, even when the yarn length from the end of the yarn in the package to the defective portion tends to be long, the defective portion can be appropriately removed from the yarn.

In the spinning machine according to one aspect of the present invention, the control unit may increase the removal length as the speed of winding the yarn in the package increases. In this configuration, even when the yarn length from the end of the yarn in the package to the defective portion tends to be long, the defective portion can be appropriately removed from the yarn.

The spinning machine according to one aspect of the present invention may further include an additive supply device that supplies an additive to the spinning device, and the spinning condition may be the presence or absence of the supply of the additive in the additive supply device. In this configuration, the defective portion can be appropriately removed from the yarn in the package according to the presence or absence of the supply of the additive.

In the spinning machine according to one aspect of the present invention, the control unit may increase the removal length in the case where the additive is supplied, as compared with the case where the additive is not supplied. In this configuration, even in the spinning machine including the additive supply device, the yarn having an appropriate length can be removed by the removal device.

A spinning machine according to one aspect of the present invention includes: a spinning device for twisting the fiber bundle to produce a yarn; a winding device that winds the yarn generated by the spinning device to form a package; a removing device for removing a defect generated in the yarn in the package; a yarn monitoring device that is disposed between the spinning device and the winding device and monitors a state of the yarn wound in the package; and a control unit that adjusts a removal length, which is a length of the yarn removed from the yarn end in the package by the removal device, based on the state of the yarn and the yarn end monitored by the yarn monitoring device. In the spinning machine having this configuration, the yarn having an appropriate length can be removed based on the defect and the yarn end detected by the monitoring of the yarn monitoring device.

In the spinning machine according to one aspect of the present invention, the control unit may stop the spinning operation of the spinning device and cut the yarn based on the state of the yarn monitored by the yarn monitoring device. In this configuration, the yarn cut when the defect is detected by the monitoring of the yarn monitoring device can be removed from the yarn having an appropriate length in order to remove the defect.

The spinning machine according to one aspect of the present invention may further include a draft device that drafts the fiber bundle supplied to the spinning device, and the control unit may stop the drafting by the draft device and cut the yarn. In this configuration, even when the yarn is cut by controlling the draft device, the yarn of an appropriate length can be removed.

The spinning machine according to one aspect of the present invention may further include a cutting device that is disposed between the spinning device and the yarn monitoring device and cuts the yarn wound in the package, and the control unit may control the cutting device to cut the yarn. In this configuration, even when a cutting device for cutting the yarn is provided, the yarn of an appropriate length can be removed.

In the spinning machine according to one aspect of the present invention, the control unit may control the removal length to be removed by the removal device based on the state of the yarn and the yarn end monitored by the yarn monitoring device in the case of a short defect in which the time from the start of defect detection to cutting is shorter than a predetermined time by monitoring of the yarn monitoring device, and the removal length to be removed by the removal device in the case of a long defect in which the time from the start of defect detection to cutting is longer than the predetermined time by monitoring of the yarn monitoring device. When the yarn is cut, the shape of the yarn end may be uncertain depending on the cutting mode. That is, the length from the detection of the defect to the yarn end becomes unstable. Therefore, the removal length is adjusted according to the monitoring result of the yarn monitoring device only when the short defect having a short removal length is removed, whereby the yarn having an appropriate length can be removed. In the case of a long defect, since the removal length is long, even if the shape of the yarn end is uncertain, the influence thereof is small, and therefore, the predetermined length may be removed.

In the spinning machine according to one aspect of the present invention, the defect that is the state of the yarn and the yarn end may be detected by monitoring with the yarn monitoring device, and the control unit may adjust the removal length based on a difference between a detection time of the defect detected by the yarn monitoring device and a detection time of the yarn end. In this configuration, the yarn of an appropriate length can be removed based on the defect and the yarn end detected by the monitoring of the yarn monitoring device.

The spinning machine according to one aspect of the present invention may further include a drive unit that rotates the package in an unwinding direction, which is a direction in which the yarn wound in the package is unwound, and the control unit may control the drive unit to adjust the removal length by adjusting the length of the yarn unwound from the package. In this configuration, the yarn corresponding to the target removal length can be reliably unwound from the package and removed.

In the spinning machine according to one aspect of the present invention, the control section may control the driving section so as to switch at least one of a rotation time when the package is rotated in the unwinding direction and a rotation speed per unit time of the package, thereby adjusting the length of the yarn unwound from the package. In this configuration, the length of the yarn unwound from the package can be easily adjusted.

The spinning machine according to one aspect of the present invention may further include a yarn splicing device that performs a yarn splicing operation for bringing the yarn into a continuous state when the yarn is in a cut state between the spinning device and the winding device, and the control unit may cause the yarn splicing device to perform the yarn splicing operation after causing the removal device to perform the removal operation for removing the defect in the yarn. In this configuration, a series of operation cycles for connecting the yarns are efficiently performed after the yarns are cut. This can shorten the time for the spinning machine to interrupt winding of the package.

The spinning machine according to one aspect of the present invention may include a plurality of spinning units each including a spinning device and a winding device, and the yarn splicing device may be provided on a yarn splicing cart that is provided so as to be capable of traveling along the plurality of spinning units arranged in one direction. In this configuration, since the time taken for the yarn splicing cart to be occupied by one spinning unit can be shortened, the operation efficiency of the entire spinning machine can be improved.

ADVANTAGEOUS EFFECTS OF INVENTION

According to one aspect of the present invention, when a defect generated in a yarn is removed by removing the yarn of a predetermined length from an end of the yarn in a package, the yarn of an appropriate length can be removed.

Drawings

Fig. 1 is a front view of a spinning machine according to a first embodiment.

Fig. 2 is a side view of the spinning machine shown in fig. 1.

Fig. 3 is a block diagram showing a configuration of the spinning machine shown in fig. 1.

Fig. 4 is a diagram simply showing the configuration of the additive supply device in the spinning machine according to the modification.

Detailed Description

Hereinafter, the spinning machine 1 according to the first embodiment will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

As shown in fig. 1, the spinning machine 1 includes a plurality of spinning units 2, a yarn splicing cart 3, a doffing cart (not shown), a first end frame 4, and a second end frame 5. The plurality of spinning units 2 are arranged in one direction. Each spinning unit 2 generates a yarn Y and winds it into a package P. When the package P becomes full in a certain spinning unit 2, the doffing cart doffs the package P and supplies a new bobbin B to the spinning unit 2.

A recovery device or the like that recovers fiber waste, yarn waste, and the like generated in the spinning unit 2 is housed in the first end frame 4. The second end frame 5 accommodates: an air pressure adjusting unit for adjusting the air pressure of compressed air (air) supplied from an air pressure feeding device 118 (see fig. 4) disposed in a fiber factory in which the spinning machine 1 is installed and supplying air to each part of the spinning machine 1; and a drive motor for supplying power to each part of the spinning unit 2. In the present embodiment, the flow path of the compressed air from the air pressure feeding device 118 to the air-jet spinning device (spinning device) 7 will not be described.

The second bezel 5 is provided with a body control device 15, a display screen 16, and input keys 17. The body control device 15 centrally manages and controls each part of the spinning machine 1. The body control device 15 includes: an input/output interface for inputting/outputting signals to/from the outside; a storage medium such as a ROM (Read Only Memory) for storing a program and information for processing, a RAM (Random Access Memory) for temporarily storing data, and the like; a CPU (Central Processing Unit); and a communication circuit and the like. The body control device 15 stores input data in the RAM based on a signal output by the CPU, loads a program stored in the ROM into the RAM, and executes the program loaded in the RAM, thereby executing various processes.

The display screen 16 can display information and the like related to the setting content and/or the state of the spinning unit 2. The operator can perform the setting operation of the spinning unit 2 by performing an appropriate operation using the input key 17. When the display screen 16 is formed by a touch panel display, the display screen 16 is formed integrally with the input keys 17. The details of an example of the control (hereinafter, also referred to as "defect removal control") for adjusting the length of the yarn Y to be removed by the suction nozzle (removing device) 28 of the yarn splicing cart 3 according to the spinning conditions by the machine body control device 15 will be described later.

Each spinning unit 2 includes, in order from the upstream side in the traveling direction of the yarn Y, a draft device 6, an air spinning device 7, a yarn monitoring device 8, a tension sensor 9, a yarn accumulating device 11, a waxing device 12, and a winding device 13. The unit controller 10 is provided for each predetermined amount of the spinning units 2, and controls the operation of the spinning units 2. The unit controller 10 may be provided in each spinning unit 2.

The draft device 6 drafts the sliver (fiber bundle) S. The air-jet spinning device 7 twists the fiber bundle F drafted by the draft device 6 by the back-twist of the air to produce a yarn Y. More specifically (however, not shown), the air-jet spinning device 7 includes a spinning chamber, a fiber guide portion, a whirling air flow generating nozzle, and a hollow guide shaft body. The fiber guide section guides the fiber bundle F supplied from the draft device 6 on the upstream side into the spinning chamber. The whirling air flow generating nozzle is arranged around the path along which the fiber bundle F travels. The whirling air flow is generated in the spinning chamber by ejecting air from a whirling air flow generating nozzle. The fiber ends of the plurality of fibers constituting the fiber bundle F are reversed by the whirling air flow and are whirled. The hollow guide shaft guides the yarn Y from the spinning chamber to the outside of the air-jet spinning device 7.

The yarn accumulating device 11 accumulates the yarn Y between the air-jet spinning device 7 and the winding device 13. The yarn accumulating device 11 has a function of drawing out the yarn Y from the air-jet spinning device 7. Instead of the yarn accumulating device 11, the yarn Y may be drawn out from the air-jet spinning device 7 by a pair of delivery rollers.

The waxing device 12 waxes the yarn Y between the yarn accumulating device 11 and the winding device 13.

The winding device 13 winds the yarn Y around the bobbin B to form a package P. The winding device 13 includes a cradle arm 21, a winding drum 22, and a traverse guide 23. The cradle arm 21 rotatably supports the bobbin B. The rocker arm 21 is swingably supported by a support shaft 24. When the bobbin B (package P) is rotated in the winding direction, the cradle arm 21 brings the surface of the bobbin B or the surface of the package P into contact with the surface of the winding drum 22 with an appropriate pressure. A drive motor (not shown) provided in the second end frame 5 drives the winding drums 22 of the plurality of spinning units 2 simultaneously. Thereby, in each spinning unit 2, the bobbin B or the package P is rotated in the winding direction.

The joint carriage 3 is provided with a reverse roller 35 b. The reverse roller 35b is a roller for rotating the package P in the unwinding direction, which is the direction opposite to the winding direction. When the package P is rotated in the unwinding direction, the cradle arm 21 separates (lifts) the front surface of the package P from the front surface of the winding drum 22. Then, the reverse roller 35b is brought into contact with the surface of the package P by the splice carriage 3. This enables the package P in contact with the reversing roller 35b to rotate in the unwinding direction.

The traverse guide 23 of each spinning unit 2 is provided on a rotary shaft shared by the plurality of spinning units 2. The traverse guide 23 traverses the yarn Y with a predetermined width with respect to the rotating bobbin B or package P by reciprocating the rotation shaft in the rotation axis direction of the winding drum 22 by a drive motor (not shown) of the second end frame 5.

The yarn monitoring device 8 monitors information on the running yarn Y between the air-jet spinning device 7 and the yarn accumulating device 11, and detects the presence or absence of a yarn defect based on the monitored information. When detecting a yarn defect, the yarn monitoring device 8 transmits a yarn defect detection signal to the unit controller 10. The tension sensor 9 measures the tension of the running yarn Y between the air spinning device 7 and the yarn accumulating device 11, and transmits a tension measurement signal to the unit controller 10. When the unit controller 10 determines that there is an abnormality based on the detection result of the yarn monitoring device 8 and/or the tension sensor 9, the unit controller 10 stops the spinning operation in the spinning unit 2 to cut the yarn Y.

When the yarn Y is cut in a certain spinning unit 2 or the yarn Y is cut for some reason, the yarn splicing cart 3 performs a yarn splicing operation in the spinning unit 2. One or more yarn splicing carriages 3 are provided in the spinning machine 1. The yarn splicing cart 3 travels along the arrangement direction (the left-right direction in fig. 1) of the spinning units 2. As shown in fig. 1, the joint carriage 3 travels by driving wheels by the travel motor 18.

As shown in fig. 2, the joint carriage 3 has a joint device 26, a suction pipe 27, a suction nozzle 28, and a reversing device 35.

When the yarn Y is in the cut-off state between the air-jet spinning device 7 and the yarn splicing device 26, the yarn splicing device 26 performs a yarn splicing operation for bringing the yarn Y into a continuous state. The yarn splicing device 26 splices the yarn Y drawn from the air-jet spinning device 7 (hereinafter referred to as a first yarn Y) and the yarn Y drawn from the package P (hereinafter referred to as a second yarn Y). The yarn splicing device 26 is a splicer using compressed air, a knotter mechanically connecting the yarns Y, or the like. In the present embodiment, a splicer will be described as an example.

The suction pipe 27 is rotatably supported by a support shaft 31, and catches and guides the first yarn Y from the air-jet spinning device 7 to the yarn splicing device 26. The suction pipe 27 sucks the first yarn Y of a predetermined length fed from the air-jet spinning device 7 when capturing the first yarn Y. The suction pipe 27 is provided to be movable to a standby position P11, a first yarn catching position P12 at which the first yarn Y from the air-jet spinning device 7 is caught, and a first yarn guiding position P13 at which the first yarn Y is guided to the piecing device 26. The standby position P11 and the first yarn guiding position P13 may be the same position. The movement (rotation) of the suction pipe 27 is controlled by the joint carriage control unit 30. The meaning of the control of the suction pipe 27 by the joint carriage control unit 30 is the same as the control of a drive unit, not shown, for moving the suction pipe 27. Hereinafter, the control of the suction nozzle 28 and the control of the reversing device 35 are also the same.

The suction nozzle 28 is rotatably supported by a support shaft 32, catches the second yarn Y from the winding device 13, and guides the second yarn Y to the yarn splicing device 26. When the suction nozzle 28 catches the second yarn Y, the yarn Y of a length is sucked and removed from an end of the yarn Y in the package P (not an end on the inner peripheral surface side of the package P that is in contact with the bobbin B, but an end on the outer peripheral surface side). The suction nozzle 28 of the present embodiment also has the following functions: the defect generated in the yarn Y is removed by removing the yarn Y having the removed length from the end of the yarn Y in the package P. The suction nozzle 28 is provided to be movable to a standby position P21, a second yarn catching position P22 where the second yarn Y from the winding device 13 is caught, and a second yarn guiding position P23 where the second yarn Y is guided to the piecing device 26. The standby position P21 and the second yarn guiding position P23 may be the same position. The movement (rotation) of the suction nozzle 28 is controlled by the joint carriage control section 30.

The reversing device 35 reverses the package P of the winding device 13. The reversing device 35 includes a support arm 35a and a reversing roller 35 b. One end of the support arm 35a is connected to the support shaft. Thereby, the support arm 35a is provided swingably about the support shaft. The support arm 35a is moved by a swing driving portion (driving portion) 40a such as a motor to a standby position (see fig. 2) where the reversing roller 35b does not contact the package P and a contact position (not shown) where the reversing roller 35b contacts the package P. The swing of the support arm 35a is controlled by the joint carriage control unit 30. The reverse roller 35b is provided at the other end of the support arm 35 a. The reverse roller 35b is rotated in the direction opposite to the winding drum 22 of the winding device 13 by a rotation driving unit (driving unit) 40b such as a motor. The rotation of the reversing roller 35b is controlled by the joint carriage control unit 30.

As described above, in the spinning machine 1 of the present embodiment, the yarn splicing cart control unit 30 executes defect removal control for adjusting the length of the yarn Y to be removed by the suction nozzle 28 in accordance with the spinning conditions. Specifically, the yarn splicing cart control unit 30 controls at least one of the rotation time when rotating the package P in the unwinding direction and the rotation speed of the package P per unit time. Thereby, the length of the yarn Y unwound from the package P is adjusted, and the length of the yarn Y removed by the suction nozzle 28 is adjusted (changed).

The joint carriage control unit 30 controls the driving of the rotation driving unit 40b in a state where the joint carriage 3 is stopped. Thus, at least one of the rotation time when the package P is rotated in the unwinding direction and the rotation speed of the package P per unit time can be controlled. The yarn splicing cart control unit 30 controls the driving of the swing driving unit 40a to switch whether or not the reversing roller 35b is in contact with the package P while the yarn splicing cart 3 is stopped. This enables the rotation time when the package P is rotated in the unwinding direction to be controlled.

The yarn splicing cart control unit 30 cuts the yarn Y upon detection of a yarn defect, and then controls at least one of the rotation time and the rotation speed per unit time of the package P as described above according to the spinning conditions, thereby unwinding the yarn Y of an appropriate length from the package P. Then, the unwound yarn Y is sucked by the suction nozzle 28. The yarn Y sucked by the suction nozzle 28 is guided to the yarn splicing device 26 by the suction nozzle 28, and is cut by a cutter (not shown) of the yarn splicing device 26. Thereby, the yarn Y in the portion where the defect occurs is removed (discarded) by the suction nozzle.

The appropriate length of the yarn Y to be removed by the suction nozzle 28 is calculated (determined) based on the spinning conditions. The spinning conditions are conditions set for the spinning machine 1 to produce a yarn to be produced in the spinning machine 1. The spinning conditions may include at least one of physical properties of the yarn Y, a thickness of the yarn Y (the number of counts of the yarn Y), and a speed (a traveling speed and a spinning speed) of the yarn Y wound around the package P. The physical properties of the yarn Y may include, for example, the mixing ratio of polyester, the type of material of the yarn Y, and the like. The spinning conditions may include the presence or absence of the supply of the additive by the additive supply apparatus 100.

For example, the yarn splicing cart control unit 30 controls at least one of the swing drive unit 40a and the rotation drive unit 40b so that the length of the yarn Y sucked by the suction nozzle 28 is longer when the mixing ratio of the polyester in the fiber bundle F spun by the spinning machine 1 is relatively high than when the mixing ratio is relatively low or when the polyester is not mixed. That is, the yarn splicing cart control unit 30 controls at least one of the swing drive unit 40a and the rotation drive unit 40b such that the higher the mixing ratio of the polyester in the fiber bundle F spun by the spinning machine 1, the longer the length of the yarn Y sucked by the suction nozzle 28.

For example, the yarn splicing cart control unit 30 controls at least one of the swing drive unit 40a and the rotation drive unit 40b so that the length of the yarn Y sucked by the suction nozzle 28 is longer when the thickness of the yarn Y generated by the spinning machine 1 is set to be relatively thin (when the spinning machine 1 generates the relatively thin yarn Y) than when the thickness of the yarn Y is set to be relatively thick (when the spinning machine 1 generates the relatively thick yarn Y). That is, the yarn splicing cart control unit 30 controls at least one of the swing drive unit 40a and the rotation drive unit 40b such that the length of the yarn Y sucked by the suction nozzle 28 becomes longer as the thickness of the yarn Y produced by the spinning machine 1 becomes thinner (the count becomes larger).

For example, the yarn splicing cart control unit 30 controls at least one of the swing drive unit 40a and the rotation drive unit 40b so that, when the speed (winding speed, spinning speed) of the yarn Y set in the spinning machine 1 is relatively high, the length of the yarn Y sucked by the suction nozzle 28 is longer than when the speed of the yarn Y is relatively low. That is, the yarn splicing cart control unit 30 controls at least one of the swing drive unit 40a and the rotation drive unit 40b such that the faster the speed of the yarn Y set in the spinning machine 1, the longer the length of the yarn Y sucked by the suction nozzle 28.

The yarn splicing cart control unit 30 shown in fig. 3 includes a storage unit 30a that stores control amounts (at least one of a rotation time when the package P is rotated in the unwinding direction and a rotation speed per unit time of the package P) that are optimal for the physical properties of each yarn Y, the thickness of each yarn Y, and the speed of each yarn Y. Such an optimum control amount can be derived from, for example, past operation data and/or experimental values. For example, when starting a batch, the operator operates the input key 17 to input information on the spinning conditions (the physical properties of the yarn Y, the thickness of the yarn Y, and the speed of the yarn Y), and the control unit acquires the input information. The joint carriage control unit 30 acquires the optimum control amount stored in association with the acquired information from the storage unit 30a, and controls at least one of the swing drive unit 40a and the rotation drive unit 40b based on the acquired control amount while the package P is wound in the batch.

Next, the operation of the spinning machine 1 in the defect removal control will be described. In the following description, the operations of the respective units are controlled based on control signals transmitted from the body control device 15 or the joint carriage control unit 30.

When a yarn breakage or yarn cutting occurs in one spinning unit 2, the cradle arm 21 is swung in the spinning unit 2, and the package P is separated from the winding drum 22. The yarn splicing cart control unit 30 transmits a control signal for moving the yarn splicing cart 3 to the one spinning unit 2 to the yarn splicing cart 3. Upon receiving the control signal, the yarn splicing cart 3 travels to the one spinning unit 2, and stops the travel by stopping the operation of the travel motor 18 at the work position corresponding to the one spinning unit 2.

Next, a braking member (not shown) provided on the splicing cart 3 contacts the package P to stop the inert rotation of the package P. When the rotation of the package P is stopped, the braking member may not be operated. Alternatively, the winding device 13 may be provided with a braking member for stopping the idle rotation of the package P.

Next, the reversing device 35 operates. The reversing device 35 moves from the standby position to the contact position, and stops at the contact position. When the reversing roller 35b of the reversing device 35 comes into contact with the package P, the package P rotates in a direction in which the second yarn Y is unwound (paid out). In the present embodiment, the rotation time or the rotation speed per unit time of the reversing roller 35b is controlled according to spinning conditions such as the physical properties of the yarn Y, the thickness of the yarn Y, and the speed of the yarn Y. As described above, the yarn splicing cart control unit 30 acquires the optimum control amount (the rotation time and the rotation speed per unit time) stored in association with the spinning condition from the storage unit 30a, and controls at least one of the swing drive unit 40a and the rotation drive unit 40b based on the acquired control amount. Thereby, the second yarn Y having a length corresponding to the spinning condition is discharged.

The suction nozzle 28 starts operating at the same timing as the reversing device 35 starts operating. The suction nozzle 28 moves from the standby position P21 to the second yarn catching position P22, and catches the second yarn Y at the second yarn catching position P22. That is, the suction nozzle 28 sucks the second yarn Y discharged from the package P by the reversing device 35. When catching the second yarn Y, the suction nozzle 28 moves from the second yarn catching position P22 to the second yarn guiding position P23, and guides the second yarn Y to the yarn splicing device 26. After the end of the joint operation of the joint device 26, the suction nozzle 28 moves to the standby position P21.

When the second yarn Y is caught by the suction nozzle 28 and the suction nozzle 28 swings to a predetermined position, the suction pipe 27 starts to operate. The suction pipe 27 moves from the standby position P11 to the first yarn catching position P12, and catches the first yarn Y at the first yarn catching position P12. The suction pipe 27 moves from the first yarn catching position P12 to the first yarn guiding position P13 when catching the first yarn Y, and guides the first yarn Y to the yarn splicing device 26. After the joint operation of the joint device 26 is completed, the suction pipe 27 moves to the standby position P11.

The yarn splicing device 26 performs a yarn splicing operation of connecting the first yarn Y guided by the suction pipe 27 and the second yarn Y guided by the suction nozzle 28. The yarn splicing device 26 cuts the first yarn Y sucked by the suction pipe 27 and the second yarn Y sucked by the suction nozzle 28. That is, a part of the first yarn Y sucked by the suction pipe 27 and a part of the second yarn Y sucked by the suction nozzle 28 are removed. The yarn end of the first yarn Y and the yarn end of the second yarn Y are twisted or connected by the yarn connecting device 26, thereby connecting the first yarn Y and the second yarn Y. As a result, the joint operation of the joint carriage 3 is completed. When the yarn splicing operation is completed, the machine body control device 15 transmits, for example, a control signal for moving the yarn splicing cart 3 to the next spinning unit 2 to the yarn splicing cart 3. The yarn splicing cart 3 moves to the next spinning unit 2 when receiving the control signal.

The operation and effect of the spinning machine 1 of the present embodiment will be described. In the spinning machine 1 of the present embodiment, the length of the yarn Y to be removed by the suction nozzle 28 is adjusted according to the spinning conditions. That is, in the present embodiment, when the spinning conditions are changed, the length of the yarn Y to be removed by the suction nozzle 28 is also changed. In the present embodiment, the yarn Y having an appropriate removal length acquired from the storage section 30a is removed by the suction nozzle 28. As a result, when the defect generated in the yarn Y is removed by removing the yarn Y of a predetermined length from the end of the yarn Y in the package P, the yarn Y of an appropriate length can be removed.

One advantage of removing the appropriate length of yarn Y is that excess length of yarn Y is not removed in order to remove the defect. This can reduce the amount of yarn Y discarded and shorten the extra time required to unwind an excess length of yarn Y. As a result, the joint efficiency (the operation efficiency of the joint carriage 3) can be improved. Another advantage of removing the appropriate length of yarn Y is that defects must be included in the removed yarn Y. This can reliably prevent the defect from being mixed into the package P.

In the spinning machine 1 of the present embodiment, the length of the yarn Y removed by the suction nozzle 28 is adjusted by controlling at least one of the swing driving portion 40a and the rotation driving portion 40b of the reversing roller 35b that rotates the package P in the unwinding direction to adjust the length of the yarn Y unwound from the package P. That is, in the spinning machine 1 of the present embodiment, the length of the yarn Y unwound from the package P is adjusted according to the spinning conditions. Thus, the yarn Y having the length from the end of the yarn Y to the defective portion in the package P, which is appropriately calculated, can be reliably removed.

In the spinning machine 1 of the present embodiment, the yarn splicing cart control unit 30 adjusts the length of the yarn Y unwound from the package P by controlling at least one of the rotation time when the package P is rotated in the unwinding direction and the rotation speed of the package P per unit time. That is, in the spinning machine 1 of the present embodiment, at least one of the rotation time when the package P is rotated in the unwinding direction and the rotation speed of the package P per unit time is adjusted according to the spinning conditions. This makes it possible to more easily adjust the length of the yarn Y unwound from the package P.

The yarn splicing cart control unit 30 can adjust the length of the yarn Y unwound from the package P by controlling the rotation time when the package P is rotated in the unwinding direction. When the rotation time is limited (for example, when the rotation time cannot be increased), the yarn splicing cart control section 30 can adjust the length of the yarn Y unwound from the package P by controlling (speeding up) the rotation speed per unit time. With this configuration, the time required to unwind the yarn Y of a predetermined length from the package P can be shortened. This can shorten the cycle time for the joint carriage 3 to perform the joint. The yarn splicing cart control unit 30 can remove the yarn Y of an appropriate length in a shorter time by controlling both the rotation time when rotating the package P in the unwinding direction and the rotation speed of the package P per unit time.

In the spinning machine 1 of the present embodiment, the yarn Y of an appropriate length can be removed from the yarn Y cut when the defect is detected based on the monitoring of the yarn monitoring device 8 in order to remove the defect.

In the spinning machine 1 of the present embodiment, the unit controller 10 controls the air-jet spinning device 7 to stop the spinning operation, thereby cutting the yarn Y. Thus, in the spinning machine 1 configured to cut the yarn Y by controlling the air-jet spinning device 7, the yarn Y having an appropriate length can be removed.

In the spinning machine 1 of the present embodiment, at least one of the physical properties of the yarn Y, the thickness of the yarn Y, and the speed of the yarn Y is used for the spinning conditions that are the basis for calculating the removal length. Thus, the length of the yarn Y from the end of the yarn Y in the package P to the defective portion is appropriately calculated. As a result, the yarn Y of an appropriate length can be removed by the suction nozzle 28.

In the spinning machine 1 of the present embodiment, the yarn splicing cart control unit 30 causes the yarn splicing device 26 to perform the yarn splicing operation after causing the suction nozzle 28 to perform the removal operation for removing the defect of the yarn Y. This makes it possible to efficiently execute a series of operation cycles of connecting the yarn Y after the yarn cutting. As a result, the time for the spinning machine 1 to interrupt winding of the package P can be shortened.

In the spinning machine 1 of the present embodiment, the yarn splicing device 26 is provided on the yarn splicing cart 3, and the yarn splicing cart 3 is provided so as to be capable of traveling along the spinning units 2 aligned in one direction. In this configuration, since the time taken for one spinning unit 2 to occupy the yarn splicing cart 3 can be shortened, the operation efficiency of the entire spinning machine 1 can be improved.

The first embodiment has been described above, but the present invention is not limited to the first embodiment. Various modifications can be made without departing from the scope of the invention.

For example, as a modification of the first embodiment, the spinning machine 1 may include an additive supply device 100 that supplies compressed air containing an additive to the air-jet spinning device 7. The structure of a spinning machine 1A (spinning machine 1A according to a modification) including the additive supply device 100 will be described with reference to fig. 4. Before the description of the configuration of the additive supply device 100, the configuration of the flow path of the compressed air from the air pressure feeding device 118 to the air-jet spinning device 7 (the first compressed air supply unit 101A), which is not described in the present embodiment, will be briefly described.

The first compressed air supply unit 101A includes: a first main pipe 112 connected to an air pressure feeding device 118; a first unit pipe 116 connected from the first main pipe 112 to each pneumatic spinning device 7; and a first supply valve 126 provided in the first unit pipe 116. The first supply valve 126 is controlled by the body control device 15 or the unit controller 10. With the configuration of the first compressed air supply unit 101A, compressed air is supplied from the air pressure feeding device 118 to each pneumatic spinning device 7.

The additive supply device 100 includes a second compressed air supply unit 101B and an additive supply unit 102. The second compressed air supply unit 101B includes: a second main pipe 111 connected to an air pressure feeding device 118; a main valve 121 disposed between the air pressure feeding device 118 and the second main pipe 111; a second unit pipe 115 connected from the second main pipe 111 to each pneumatic spinning device 7; and a second supply valve 125 provided in the second unit pipe 115. The second supply valve 125 is controlled by the body control device 15 or the unit controller 10.

The spinning machine 1 includes at least one additive supply unit 102. One additive supply unit 102 may be provided for each predetermined amount of the spinning units 2. The additive supply unit 102 supplies the water mist additive to the second main pipe 111. Examples of the additive include a drug, water, an aqueous solution, and the like. The chemical contains, for example, a component for preventing an oil agent from accumulating in the air-jet spinning device 7 of each spinning unit 2. The chemical may be a chemical capable of imparting at least one of the functions of antibiosis, deodorization, waxing, and the like to the yarn Y, in addition to the component for preventing the accumulation of the oil agent. In the additive supply unit 102, compressed air generated by the air pressure-feed device 118 can be used when generating the additive in the form of mist.

With the above-described configuration including the second compressed air supply section 101B and the additive supply section 102, compressed air containing an additive is supplied from the air pressure-feeding device 118 to each pneumatic spinning device 7. The machine-body control device 15 closes the main valve 121 and opens the first supply valve 126, thereby supplying compressed air containing no additive to each pneumatic spinning device 7. The machine-body control device 15 opens the main valve 121 and the second supply valve 125 and closes the first supply valve 126, thereby supplying the additive-containing compressed air to each pneumatic spinning device 7.

In the spinning machine 1A including the additive supply device 100, the machine body control device 15 may control at least one of the swing drive portion 40a and the rotation drive portion 40b based on the presence or absence of the supply of the additive to the air-jet spinning device 7 by the additive supply device 100. More specifically, the machine body control device 15 may control at least one of the swing drive portion 40a and the rotation drive portion 40b so as to increase the length of the yarn Y sucked by the suction nozzle 28 in the case where the additive is supplied, as compared with the case where the additive supply device 100 does not supply the additive to the air-jet spinning device 7. That is, the body control device 15 may control at least one of the swing drive portion 40a and the rotation drive portion 40b so as to increase the length of the yarn Y unwound from the package P in the case where the additive is supplied, as compared with the case where the additive is not supplied to the air-jet spinning device 7.

When the yarn Y to which the additive is supplied is cut in the air-jet spinning device 7, the unit controller 10 closes the second supply valve 125 and then stops the spinning operation in the air-jet spinning device 7. Therefore, even when the yarn Y is cut due to the detection of a defect in the yarn Y by the yarn monitoring device 8, the distance to cut the yarn Y is increased in accordance with the response of the second supply valve 125. That is, the length of the yarn Y from the end of the yarn Y in the package P to the defective portion becomes long. Therefore, in the case where the additive is supplied, the defective portion cannot be removed without increasing the length of the yarn Y unwound from the package P, as compared with the case where the additive is not supplied to the air-jet spinning device 7. In the spinning machine 1A according to the modification, even when the additive is supplied to the air-jet spinning device 7, the yarn Y having an appropriate length can be sucked by the suction nozzle 28, and therefore, the defect occurring in the yarn Y can be reliably removed. The additive supply device 100 may supply the additive to the fiber bundle F or the yarn Y from a position other than the position shown in fig. 4.

Next, a method of adjusting the removal length in the second embodiment will be described. While the removal length is adjusted according to the spinning conditions in the first embodiment, the removal length is adjusted based on the monitoring result of the yarn monitoring device 8 in the second embodiment. The basic configuration of the second embodiment is the same as that of the first embodiment. Therefore, descriptions of common parts are appropriately omitted.

The yarn monitoring device 8 monitors information on the traveling yarn Y between the air-jet spinning device 7 and the yarn accumulating device 11, and detects the presence or absence of a yarn defect based on the monitored information. When detecting a yarn defect, the yarn monitoring device 8 transmits a yarn defect detection signal to the unit controller 10. When the unit controller 10 determines that there is an abnormality based on the detection result of the yarn monitoring device 8, the unit controller 10 stops the spinning operation in the spinning unit 2 to cut the yarn Y. At this time, the unit controller 10 stores the reception time of the yarn defect detection signal transmitted from the yarn monitoring device 8.

The yarn Y is cut and then wound into a package P. Therefore, the yarn monitoring device 8 detects the yarn end of the yarn Y. Specifically, the yarn end is detected based on a state in which the yarn Y is detected and the yarn Y is not detected. When the yarn end is detected, the yarn monitoring device 8 transmits a yarn end detection signal to the unit controller 10. At this time, the unit controller 10 stores the reception time of the yarn end detection signal transmitted from the yarn monitoring device 8.

The removal length is determined based on a time difference between the reception time of the yarn defect detection signal and the reception time of the yarn end detection signal. Specifically, if the speed of the yarn Y is constant, the speed can be determined by adding a predetermined value to the product of the time difference and the speed. Further, if the speed of the yarn Y is not constant, it may be determined in consideration of the speed change. The purpose of adding the predetermined value is to make it impossible to know whether or not the yarn monitor 8 can always detect the most upstream portion of the yarn defect. However, the predetermined value is not necessarily added. The time difference can be obtained by storing the time at which the yarn defect detection signal and the yarn end detection signal are received. As another method, the time difference can be obtained by measuring the time from the reception of the yarn defect detection signal to the reception of the yarn end detection signal.

The defect removal control can be performed in the same manner as in the first embodiment. That is, the yarn splicing cart control unit 30 can adjust the length of the yarn Y unwound from the package P and can adjust the length of the yarn Y removed by the suction nozzle 28 by controlling at least one of the rotation time when the package P is rotated in the unwinding direction and the rotation speed of the package P per unit time.

In the first embodiment, the modification of the first embodiment, and the second embodiment, the description has been given by taking an example in which the reversing roller 35b provided in the splice carriage 3 is used to rotate the package P in the unwinding direction, but the present invention is not limited to this example. For example, instead of the configuration in which the winding drums 22 of the plurality of spinning units 2 are driven simultaneously, a rotation driving unit that rotationally drives the winding drums may be provided in each of the spinning units 2, and the package P may be rotated in the unwinding direction by the winding drums. Alternatively, each spinning unit 2 may be provided with a rotation driving unit for rotating a support unit provided on the cradle arm 21 and supporting the bobbin B (package P), and the package P may be rotated in the unwinding direction by the rotation driving unit.

In the first embodiment, the modification of the first embodiment, and the second embodiment, the description has been given by taking an example in which the suction nozzle 28 provided in the joint carriage 3 is applied as the removing device, but the present invention is not limited to this example. Here, a modified example of the removing device will be described.

For example, in a spinning machine having a configuration in which the yarn splicing device 26 and the suction nozzle 28 are provided for each spinning unit 2, the suction nozzle can be used as a removal device. Instead of the suction nozzle 28, a suction device having a suction port smaller than the suction nozzle 28 may be applied as the removal device. Further, a drawing device for drawing the yarn end from the package P may be provided separately from the suction device. In the configuration in which the yarn end pulled out by the pulling-out device is guided to the piecing device 26 by the suction device, the suction device can also be applied as a removing device. Also, these suction devices may not be moved and may be located at a fixed position. In this case, the compressed air may be supplied so that the yarn end can be sucked by the suction device. These suction devices may be configured to suck the yarn Y of a predetermined length from the package P.

In the first embodiment, the modified examples of the first embodiment, and the second embodiment, the description has been given by taking the example in which the operations of the travel motor 18, the suction pipe 27, the suction nozzle 28, the swing drive unit 40a, and the rotation drive unit 40b are controlled by the joint carriage control unit 30, but may be controlled by the body control device (control unit) 15.

In the first embodiment, the modification of the first embodiment, and the second embodiment, the unit controller 10 has been described as an example of cutting the yarn Y by stopping the spinning operation in the spinning unit 2, but the present invention is not limited to this example. For example, the unit controller 10 may cut the yarn Y by stopping the draft by the draft device 6. Further, a cutting device may be newly provided between the air-jet spinning device 7 and the winding device 13, and the unit controller 10 may control the cutting device to cut the yarn Y. In the case of the second embodiment, since the yarn end needs to be detected by the yarn monitoring device 8, the cutting device needs to be located upstream of the yarn monitoring device 8.

In this way, when the structure for cutting the yarn Y is changed, the length from the end of the yarn Y in the package P to the defective portion may be changed. Therefore, as one of the above-described spinning conditions, a structure of cutting the yarn Y may be included. That is, the length of the yarn Y to be removed by the suction nozzle 28 may be adjusted according to the cutting configuration of the yarn Y.

In the first embodiment, the modified examples of the first embodiment, and the second embodiment, the description has been given of an example in which the air-jet spinning device 7 is disposed above the winding device 13, and the yarn Y travels from the upper side to the lower side in the height direction of the spinning unit 2. However, the air-jet spinning device 7 may be disposed below the winding device 13, and the yarn Y may travel from the lower side to the upper side in the height direction of the spinning unit 2.

In the first embodiment, the modified examples of the first embodiment, and the second embodiment, the description has been given by taking an example in which the joint device 26 is configured as a splicer or a knotter. However, the yarn splicing device 26 may be configured to bring the cut yarn Y into a continuous state by splicing. In this case, the yarn Y having the removal length corresponding to the spinning conditions may be removed from the package P until the yarn Y from the package P is reversely fed to the air-jet spinning device 7.

In the first embodiment, the modifications of the first embodiment, and the second embodiment, an example is described in which the length of the yarn Y unwound from the package P is adjusted by controlling at least one of the rotation time when the package P is rotated in the unwinding direction and the rotation speed of the package P per unit time as the defect removal control. However, a yarn end detection sensor for detecting that the yarn Y is caught by the removing device may be provided inside the removing device. In this case, the removal length can be adjusted by changing the time for further suction from the time of detection by the yarn end detection sensor. Further, the removal length may be adjusted by controlling at least one of a rotation time when the package P is rotated in the unwinding direction and a rotation speed of the package P per unit time from the time of detection by the yarn end detection sensor.

In the first embodiment, the modification of the first embodiment, and the second embodiment, an example in which the removal length is adjusted by the unit controller 10 regardless of the type of the defect detected by the monitoring of the yarn monitoring device 8 has been described. However, the unit controller 10 may adjust the removal length in accordance with the type of the defect detected by the yarn monitoring device 8.

As the types of defects detected by the yarn monitoring device 8, short defects and long defects are listed. That is, for example, in the first embodiment, the unit controller 10 may perform control so that the removal length to be removed by the removal device is adjusted in accordance with the spinning condition only when the yarn monitoring device 8 detects a short defect, and the removal device removes a predetermined length that does not affect the spinning condition when the yarn monitoring device detects a long defect. The same applies to the modified example of the first embodiment and the second embodiment.

The short defect is a defect in the case where the time from the start of detection of the defect by monitoring by the yarn monitoring device 8 to the time until cutting is shorter than a predetermined time. That is, the short defect is a defect in which the capturing time by the removing device is short. A long defect is a defect in which the time from the start of detection of the defect to the time of cutting is longer than a predetermined time. That is, the long defect is a defect in which the time for capturing by the removing device is long.

Specifically, the short defect is a defect having a value obtained by adding 200% of the standard thickness to the standard thickness. As another example, there is a defect that the thickness is not less than a value obtained by adding 80% of the standard thickness to the value of the standard thickness and the length is not less than 3 cm. That is, the short defect is a defect in the case where the yarn having the first length is detected, the yarn having the first length being a value larger than the standard thickness, that is, the yarn having the first length or larger, or the yarn having the second length or larger. At this time, the second prescribed value is smaller than the first prescribed value.

Further, as a specific example of the long defect, there is a defect in the case where a value obtained by adding 30% of the standard thickness to the value of the standard thickness is not less than the value and the length is continued by not less than 20 cm. As another example, there is a defect that the value obtained by subtracting 25% of the standard thickness from the value of the standard thickness is not more than the value and the length is not less than 20 cm. That is, the long defect is a defect in the case where the second length is detected for a yarn having a value greater than the standard thickness, that is, a value greater than a third predetermined value, or the third length is detected for a yarn having a value less than the standard thickness, that is, a value less than a fourth predetermined value. At this time, the fourth predetermined value is smaller than the third predetermined value. The second length may be the same length as the third length or may be shorter than the third length. When the short defect is also considered, the first prescribed value > the second prescribed value > the third prescribed value ≧ the fourth prescribed value, the first length < the second length ≦ the third length.

These values of short defects and long defects can also be changed appropriately. Further, the value of the standard thickness may be multiplied or divided without addition or subtraction.

In the first embodiment, the case where the removal length is adjusted according to the spinning conditions has been described, but the present invention is not limited to this example. For example, the removal length may be adjusted in consideration of the reception time of the yarn defect detection signal and the reception time of the yarn end detection signal, as in the second embodiment. In this configuration, even when the removal length cannot be adjusted according to the spinning conditions, the removal length can be adjusted according to the detection result of the yarn monitoring device 8. For example, a case where the optimum control amount stored in association with the spinning condition cannot be acquired from the storage unit 30a due to a communication abnormality or the like, a case where the optimum control amount associated with the input spinning condition is not stored in the storage unit 30a, and the like can be cited. Even in this case, the removal length can be adjusted based on the detection result of the yarn monitoring device 8. Further, when the optimum control amount is not stored in the storage section 30a due to the new spinning condition, the result of adjusting the removal length based on the detection result of the yarn monitoring device 8 can be stored in the storage section 30a as the optimum control amount.

Claims

1. A spinning machine is provided with:

a spinning device for twisting the fiber bundle to produce a yarn;

a winding device that winds the yarn generated by the spinning device to form a package;

a removing device for removing a defect generated in the yarn in the package; and

a control section for adjusting a removal length of the yarn removed from an end of the yarn in the package by the removal device, in accordance with spinning conditions.

2. The spinning machine according to claim 1, further comprising:

a yarn monitoring device disposed between the spinning device and the winding device and monitoring a state of the yarn wound in the package,

in the spinning machine, the yarn is cut based on the state of the yarn monitored by the yarn monitoring device.

3. A spinning machine according to claim 2,

the control unit controls the removal length to be removed by the removal device in accordance with spinning conditions in the case of a short defect in which a time from the start of defect detection to cutting is shorter than a predetermined time by monitoring of the yarn monitoring device, and controls the removal device to remove a removal length of a predetermined length in the case of a long defect in which a time from the start of defect detection to cutting is longer than the predetermined time.

4. A spinning machine according to claim 2 or 3,

the control unit stops the spinning operation of the spinning device to cut the yarn.

5. A spinning machine according to any one of claims 2 to 4, further comprising:

a draft device for drafting the fiber bundle supplied to the spinning device,

the control unit stops the drafting by the drafting device to cut the yarn.

6. A spinning machine according to claim 2 or 3, further comprising:

a cutting device disposed between the spinning device and the winding device, for cutting the yarn wound in the package,

the control unit controls the cutting device to cut the yarn.

7. A spinning machine according to any one of claims 2 to 6,

the control unit adjusts the removal length based on a difference between a detection time of the defect detected by the monitoring of the yarn monitoring device and a detection time of the end of the yarn when the removal length cannot be obtained according to the spinning conditions.

8. A spinning machine according to any one of claims 1 to 7,

the spinning conditions include at least one of a physical property of the yarn, a thickness of the yarn, and a speed of winding the yarn around the package.

9. A spinning machine according to claim 8,

the spinning conditions are a mixing ratio of polyester as a physical property of the yarn,

the control unit may increase the removal length as the mixing ratio of the fiber bundle spun by the spinning device increases.

10. A spinning machine according to claim 8 or 9,

the spinning conditions are the thickness of the yarn,

the control unit may increase the removal length as the thickness of the yarn produced by the spinning device becomes smaller.

11. A spinning machine according to any one of claims 8 to 10,

the spinning condition is a speed of the yarn wound in the package,

the control unit increases the removal length as the yarn speed set in the spinning device increases.

12. A spinning machine according to any one of claims 1 to 11, further comprising:

an additive supply device for supplying an additive to the spinning device,

the spinning conditions are the presence or absence of the supply of the additive in the additive supply device.

13. A spinning machine according to claim 12,

the control unit may increase the removal length in a case where the additive is supplied, as compared with a case where the additive is not supplied.

14. A spinning machine is provided with:

a spinning device for twisting the fiber bundle to produce a yarn;

a removing device for removing a defect generated in the yarn in the package;

a yarn monitoring device that is disposed between the spinning device and the winding device and monitors a state of the yarn wound in the package; and

a control unit that adjusts a removal length of the yarn removed from the end of the yarn in the package by the removal device, based on the state of the yarn monitored by the yarn monitoring device and the end of the yarn.

15. A spinning machine according to claim 14,

the control unit stops the spinning operation of the spinning device and cuts the yarn based on the state of the yarn monitored by the yarn monitoring device.

16. A spinning machine according to claim 14 or 15, further comprising:

a draft device for drafting the fiber bundle supplied to the spinning device,

the control unit stops the drafting by the drafting device to cut the yarn.

17. A spinning machine according to claim 14, further comprising:

a cutting device disposed between the spinning device and the yarn monitoring device, for cutting the yarn wound in the package,

the control unit controls the cutting device to cut the yarn.

18. A spinning machine according to any one of claims 14 to 17,

the control unit controls the removal length to be removed by the removal device to be adjusted in accordance with the state of the yarn monitored by the yarn monitoring device and the end of the yarn when a short defect in which the time from the start of detection of the defect to the cutting is shorter than a predetermined time is detected by monitoring by the yarn monitoring device, and controls the removal device to remove a removal length of the predetermined length when a long defect in which the time from the start of detection of the defect to the cutting is longer than the predetermined time is detected.

19. A spinning machine according to any one of claims 14 to 18,

detecting a defect that is a state of the yarn and an end of the yarn by monitoring with the yarn monitoring device,

the control unit adjusts the removal length based on a difference between a detection time of the defect detected by the yarn monitoring device and a detection time of the end of the yarn.

20. A spinning machine according to any one of claims 1 to 19, further comprising:

a driving section configured to rotate the package in an unwinding direction in which the yarn wound in the package is unwound,

the control unit controls the driving unit to adjust the length of the yarn unwound from the package, thereby adjusting the removal length.

21. A spinning machine according to claim 20,

the control unit controls the driving unit so as to switch at least one of a rotation time during which the package is rotated in the unwinding direction and a rotation speed per unit time of the package, thereby adjusting the length of the yarn unwound from the package.

22. A spinning machine according to any one of claims 1 to 21, further comprising:

a yarn splicing device that performs a yarn splicing operation for bringing the yarn into a continuous state when the yarn is in a cut state between the spinning device and the winding device,

the control unit causes the yarn splicing device to perform the yarn splicing operation after causing the removing device to perform the yarn splicing operation.

23. A spinning machine according to claim 22,

comprising a plurality of spinning units each including the spinning device and the winding device,

the yarn splicing device is provided on a yarn splicing cart provided to be capable of traveling along the plurality of spinning units arranged in one direction.