CN110642095B

CN110642095B - Yarn winding machine

Info

Publication number: CN110642095B
Application number: CN201911045482.1A
Authority: CN
Inventors: 中山升; 中村雄太
Original assignee: Murata Machinery Ltd
Current assignee: Murata Machinery Ltd
Priority date: 2014-07-10
Filing date: 2015-07-02
Publication date: 2021-03-26
Anticipated expiration: 2035-07-02
Also published as: CN110642095A; JP2016016959A; CN105253710B; CN105253710A; EP2966023A1; EP2966023B1

Abstract

The invention provides a yarn winding machine. The yarn winding machine includes a yarn supplying section, a winding section, a yarn splicing device, a detecting section, and a determining section. The yarn supplying section supplies a yarn. The winding section includes a rotation driving section for rotating the package, and winds the yarn supplied from the yarn supplying section into the package. The yarn joining device joins the yarn from the yarn supplying section and the yarn from the winding section. The detection unit detects a splice formed by the yarn splicing device. The judging part judges whether the joint is normal or not according to the detection result of the detecting part. After the determination unit determines that the joint is normal, the winding unit increases the acceleration of the rotational speed of the package to wind the package.

Description

Yarn winding machine

The present application is a divisional application of an invention patent application having an application number of 201510381921.1, an application date of 2015, 7/2, and an invention name of "a yarn winding machine and a yarn winding method".

Technical Field

The present invention relates generally to a yarn winding machine for inspecting a joint formed by a yarn splicing device.

Background

Conventionally, a yarn winding machine including a yarn supplying section, a winding section, and a yarn splicing device is known. The winding section winds the yarn by rotating the package. The yarn splicing device splices the yarn from the yarn supplying section and the yarn from the winding section when the yarn is cut between the yarn supplying section and the winding section. Jp 2013-67892 a (patent document 1), jp 2013-230908 a (patent document 2), and jp 2-215662 a (patent document 3) disclose techniques related to a yarn winding machine provided with a yarn joining device.

The yarn winding machine of patent document 1 is composed of a plurality of textile units. Since the winding section of each spinning unit is driven by a common drive source, the rotational speed of the winding drum for rotating the package is the same in all the spinning units. Each spinning unit is provided with a yarn splicing monitor for measuring the thickness of a yarn splice formed by the yarn splicing device. When it is determined that the yarn splicing operation is abnormal, each spinning unit cuts the yarn and performs yarn splicing again.

In the yarn winding machine of patent document 2, a yarn monitoring device is disposed upstream of the yarn joining device. The yarn monitoring device is an optical sensor or the like, and measures the quality of the yarn by detecting the thickness of the yarn passing through the yarn passage. The yarn monitoring device includes a blowout part that blows compressed air to the yarn passage. This makes it possible to blow off the yarn end adhering to the yarn path, and thus the measurement accuracy of the yarn monitoring device can be maintained.

Patent document 3 discloses a method of inspecting a yarn splicing device (splicer). The yarn winding machine has a mode for performing an inspection of the yarn splicing device, and when the mode is effective, the yarn splicing device rotates the package at a low speed and applies a predetermined tension to the yarn from the yarn supplying portion to detect the presence or absence of yarn breakage. When a yarn break occurs, the yarn winding machine notifies an operator that the yarn joining is incomplete. When the yarn breakage does not occur, the yarn winding machine cuts the yarn and performs yarn splicing again.

Disclosure of Invention

In a conventional yarn winding machine, when a yarn joining operation of a yarn joining device fails, a yarn from a package is wound into the package once. Then, the yarn winding machine sucks the surface of the package, etc., to catch the yarn end, and the yarn splicing device performs yarn splicing again. However, when the yarn end is caught from the package, there is a possibility that the catching of the yarn end fails or a part of the yarn on the surface layer of the package is caught.

In the yarn winding machine of patent document 1, the rotation speed of the winding tube for rotating the package is the same in all the spinning units, and therefore the package also rotates rapidly after the yarn splicing operation. As a result, the yarn is wound quickly after the yarn joining operation. Therefore, even in the case where the package is stopped after the yarn splicing failure is detected, there is a high possibility that the yarn end has already been wound into the package. Therefore, the above problem is remarkably exhibited. The yarn winding machine of patent document 2 does not disclose a structure for solving the above problem.

Patent document 3 discloses control for rotating the package at a low speed after the yarn splicing in a mode in which the inspection of the yarn splicing device is performed. However, this control is not described or suggested in the case of normal winding. In the mode of performing the inspection of the yarn joining device, the package is rotated at a low speed after the yarn joining is performed, and then the yarn is cut once, so that the rotation speed of the package does not increase.

The invention aims to provide a yarn winding machine which is difficult to wind a yarn end into a package when yarn connection fails.

According to a first aspect of the present invention, a yarn winding machine includes a yarn supplying section, a winding section, a yarn splicing device, a detecting section, and a determining section. The yarn supplying section supplies a yarn. The winding section includes a rotation driving section for rotating a package, and winds the yarn supplied from the yarn supplying section into the package. The yarn joining device joins the yarn from the yarn supplying portion and the yarn from the winding portion. The detection unit detects a yarn joint that is a part to be spliced by the yarn splicing device. The judging part judges whether the joint is normal or not according to the detection result of the detecting part. After the determination unit determines that the joints are normal, the winding unit increases the acceleration of the rotation speed of the package to wind the package.

Thus, the acceleration of the package is increased and the rotation speed of the package is accelerated to the target speed after the judgment that the joints are normal, and therefore the rotation speed of the package until the judgment of the joints is performed can be suppressed. Therefore, the yarn end is not easily wound into the package in the case of a failed yarn splicing. Therefore, for example, the yarn end of the package can be reliably captured.

In the yarn winding machine, the following configuration is preferable. An average acceleration of a period from when the winding unit starts rotating the package to when the determining unit determines the yarn splicing operation is performed after the yarn splicing apparatus performs yarn splicing is set as a first acceleration. The average acceleration during a period from when the determination unit determines that the joint is normal to when the rotational speed of the package reaches the target speed is set as a second acceleration. The winding unit changes the rotational speed of the package such that the second acceleration is greater than the first acceleration.

Accordingly, the acceleration of the package is low before the determination of the yarn splicing by the determination section, and therefore the rotation speed of the package after the yarn splicing failure can be suppressed.

In the yarn winding machine, it is preferable that the winding section stops winding the package when the determination section determines that the yarn end is not formed or the yarn end is abnormal.

This makes it possible to stop the winding operation when the yarn joining fails.

In the yarn winding machine, it is preferable that the winding section stops winding the package before the yarn end is wound around the package when the determination section determines that the yarn end is not formed or the yarn end is abnormal.

This can reliably catch the yarn end of the package.

The yarn winding machine preferably includes a yarn release member that performs a yarn release process of applying a force to the yarn in a direction in which the yarn is released from the detection portion after the yarn joining device performs the yarn joining.

When the yarn joining fails, the yarn is forced to come off the detection section by the yarn escape member, but when the yarn joining succeeds, the yarn does not escape even if the yarn escape member is forced. Therefore, by performing the yarn separating process, it is possible to determine whether or not the yarn joining is successful at an early timing.

In the yarn winding machine, the yarn release member is preferably an air ejecting section that ejects air to a yarn path of the yarn wound into the package.

Thus, it is possible to prevent an excessive tension from being applied to the yarn in the case of successful yarn joining and to substantially reliably separate the yarn from the detection portion in the case of failed yarn joining.

In the yarn winding machine, it is preferable that the yarn release member performs the yarn release process after the winding of the package by the winding section is started and after the slack of the yarn that occurs when the yarn is released by the yarn joining device disappears.

Accordingly, the yarn separating member can be caused to perform the yarn separating process at a relatively early timing, and therefore, it is possible to determine whether or not the yarn joining has succeeded at a relatively early timing.

In the yarn winding machine, the yarn joining device includes a holding portion that holds the yarn to be joined and a yarn accumulating portion that pulls the yarn held by the holding portion. The yarn separating member performs the yarn separating process after the holding portion releases the yarn and before the yarn accumulating portion releases the yarn.

Thus, the yarn separating member can be caused to perform the yarn separating process at a very early timing, and therefore, it is possible to determine whether or not the yarn joining has succeeded at a very early timing.

The yarn winding machine includes a restraining unit and a catching and guiding device. The suppressing unit suppresses the operation of the yarn after the yarn separating process is performed by the yarn separating member. The catching and guiding device catches the yarn from the package that is restrained by the restraining section and guides the yarn to the yarn splicing device.

Thus, when the yarn joining is failed and the yarn joining is performed again, the catching guide device can more reliably catch the yarn.

The yarn winding machine preferably includes a yarn accumulating device that accumulates the yarn between the yarn supplying portion and the winding portion.

Even when the yarn winding machine includes the yarn accumulating device, whether or not the yarn joining is successful can be determined at an early timing, and therefore the amount of the yarn accumulated during the period until the determination is made by the determination unit can be suppressed. Therefore, the amount of yarn to be discarded and the time required for discarding the yarn in the case of a failed yarn joining operation can be reduced.

The yarn winding machine preferably includes a control unit that controls at least the winding unit, the yarn splicing device, and the detection unit.

Thus, since the plurality of components are controlled by the single control unit, the control can be performed smoothly.

According to a second aspect of the present invention, a yarn winding method includes a yarn joining step, a detecting step, a judging step, and a winding step. In the yarn splicing step, the yarn is spliced between the yarn from the yarn supplying portion that supplies the yarn and the yarn from the winding portion that winds the yarn supplied from the yarn supplying portion into a package. In the detection step, the piecing, which is a part to be pieced in the piecing step, is detected. In the determining step, whether or not the joint is normal is determined based on the detection result in the detecting step. In the winding step, after the joint is determined to be normal in the determining step, the acceleration of the rotation speed of the package is increased to wind the package.

Thus, the acceleration of the package is increased to the target speed after the judgment that the joints are normal, and therefore the rotation speed of the package until the judgment of the joints is performed can be suppressed. Therefore, the yarn end is not easily wound into the package in the case of a failed yarn splicing. Therefore, for example, the yarn end of the package can be reliably captured.

Drawings

Fig. 1 is a side view showing a structure of a spinning unit provided in a spinning machine according to an embodiment of the present invention.

Fig. 2 is an enlarged perspective view showing the shapes of the yarn accumulating device and the first guide.

Fig. 3 is a perspective view showing the structure of the yarn splicing device.

Fig. 4 is a perspective view showing the structure of the yarn monitoring device.

Fig. 5 is a flowchart showing processing performed by the textile unit when a yarn is broken or cut.

Fig. 6A is a graph showing a change in the rotational speed of the package when the yarn splicing according to the present embodiment succeeds.

Fig. 6B is a graph showing a change in the rotational speed of the package when the yarn joining according to the conventional example is successful.

Fig. 7 is a side view showing a weaving unit in the course of yarn splicing.

Fig. 8 is a side view showing the textile unit when the yarn splicing is successful.

Fig. 9 is a side view of the textile unit showing a state in which the yarn end of the second yarn is detached by the yarn detaching device at the time of a yarn splicing failure.

Fig. 10 is a side view of the spinning unit showing a state in which the second catching guide catches the yarn end of the second yarn when the yarn splicing fails.

Fig. 11 is a graph showing a change in the rotational speed of the package when the yarn joining according to the modification is successful.

Detailed Description

Next, a spinning machine (yarn winding machine) according to an embodiment of the present invention will be described with reference to the drawings. In the present specification, "upstream" and "downstream" refer to upstream and downstream in the traveling direction of a fiber bundle and a textile yarn at the time of spinning.

The spinning machine includes a plurality of spinning units 2 arranged in parallel and a machine control device, not shown, for collectively managing the spinning units 2. Each spinning unit 2 spins the fiber bundle 8 fed from the draft device 7 by an air spinning device (yarn feeding section) 9 to generate a spun yarn 10, and winds the spun yarn 10 by a winding section 26 to form a package 50.

As shown in fig. 1, each spinning unit 2 includes a draft device 7, an air spinning device 9, a yarn accumulating device 22, a yarn joining device 23, a yarn monitoring device (detecting section) 25, and a winding section 26, which are arranged in this order from upstream to downstream. Each part of the weaving unit 2 is controlled by a unit controller 90 provided in the weaving unit 2. However, each part of the spinning unit 2 may be controlled by the machine control device.

The draft device 7 includes four draft rollers, i.e., a rear roller 16, a third roller 17, a middle roller 19 on which a rubber apron 18 is mounted, and a front roller 20, in this order from the upstream side. Each draft roller is rotationally driven at a predetermined rotational speed. The draft device 7 has opposed rollers arranged to face the draft rollers.

The draft device 7 pinches and conveys the sliver 15 supplied from a can (not shown) via a sliver guide between draft rollers and counter rollers, and thereby performs drawing (draft) to form the fiber bundle 8 before a predetermined fiber amount (or thickness) is reached.

An air weaving device 9 is arranged immediately downstream of the front roller 20. The air weaving device 9 twists the fiber bundle 8 supplied from the draft device 7 to produce a woven yarn 10. In the present embodiment, an air type spinning device that twists the fiber bundle 8 with rotating air is used.

Downstream of the air weaving device 9, a first guide 61 (fig. 2) is arranged for guiding the weaving yarn 10. The first guide 61 guides the spun yarn 10 to the yarn accumulating device 22. The first guide 61 is movable to pull the spun yarn 10 toward the yarn accumulating device 22 at the time of yarn splicing or the like.

A yarn accumulating device 22 is provided downstream of the first guide 61. The yarn accumulating device 22 includes a yarn accumulating roller 41, an electric motor 42 for driving and rotating the yarn accumulating roller 41, and a yarn hooking member 43. The spun yarn 10 is temporarily accumulated by winding the spun yarn 10 around the outer peripheral surface of the yarn accumulating roller 41.

A yarn hooking member 43 is attached to a downstream end of the yarn accumulating roller 41. The yarn hooking member 43 is supported to be rotatable relative to the yarn accumulating roller 41. A permanent magnet is attached to one of the yarn hooking member 43 and the yarn accumulating roller 41, and a hysteresis material is attached to the other. By these magnetic mechanisms, a torque is generated against the relative rotation of the yarn hooking member 43 with respect to the yarn accumulating roller 41. Therefore, only when a force against the torque is applied to the yarn hooking member 43 (when a yarn tension equal to or greater than a predetermined value is applied), the yarn hooking member 43 can rotate relative to the yarn accumulating roller 41, and the spun yarn 10 wound around the yarn accumulating roller 41 is unwound. When a force against the torque is not applied to the yarn hooking member 43, the yarn accumulating roller 41 and the yarn hooking member 43 rotate integrally, and the spun yarn 10 is accumulated in the yarn accumulating roller 41.

As described above, the yarn accumulating device 22 operates to unwind the spun yarn 10 when the yarn tension on the downstream side increases, and to stop the unwinding of the spun yarn 10 when the yarn tension decreases (the spun yarn 10 is about to slacken). Thus, the yarn accumulating device 22 can eliminate the slack of the spun yarn 10 and apply an appropriate tension to the spun yarn 10. Further, as described above, the yarn hooking member 43 operates to absorb the variation in the tension applied to the spun yarn 10 between the yarn accumulating device 22 and the winding portion 26, and thereby, the variation in the tension can be prevented from affecting the spun yarn 10 from the air spinning device 9 to the yarn accumulating device 22.

A second guide 62 is provided downstream of the yarn accumulating roller 41, and the second guide 62 restricts the operation of the spun yarn 10 unwound from the yarn accumulating roller 41. A yarn splicing device 23 is provided downstream of the second guide 62. When the spun yarn 10 between the air spinning device 9 and the package 50 is cut for some reason, the yarn joining device 23 joins the spun yarn 10 (first yarn) from the air spinning device 9 and the spun yarn 10 (second yarn) from the package 50. In the present embodiment, the yarn splicing device 23 is a twisting device that twists yarn ends with each other by a rotating air flow generated by compressed air. However, the yarn splicing device 23 is not limited to the above splicing device, and a mechanical knotter or the like can be used, for example.

The weaving unit 2 includes a first catching guide device 27 and a second catching guide device (catching guide device) 28 that guide the woven yarn 10 to the yarn joining device 23.

A base end portion of the first catching guide 27 is rotatably supported, and the first catching guide 27 is rotatable in the up-down direction with the base end portion as a rotation center. The first catching guide device 27 is formed in a hollow shape, is connected to a blower not shown, and can generate a suction air flow. The first catching guide 27 can catch the yarn end of the first yarn by rotating downward (see fig. 7). The first catching guide device 27 can guide the first yarn to the yarn joining device 23 by rotating upward after catching the first yarn.

A base end portion of the second catching guide 28 is rotatably supported, and the second catching guide 28 is rotatable in the up-down direction with the base end portion as a rotation center. The second catching guide device 28 is also formed in a hollow shape, and is connected to an unillustrated blower, and can generate a suction air flow. The second catching guide 28 can catch the yarn end of the second yarn by rotating upward (see fig. 7). The second catching guide device 28 can guide the second yarn to the yarn joining device 23 by rotating downward after catching the second yarn.

The yarn joining device 23 is driven in a state where the first yarn and the second yarn are guided to the yarn joining device 23, thereby joining the first yarn and the second yarn and bringing the spun yarn 10 into a continuous state between the air spinning device 9 and the package 50. This enables the yarn 10 to be wound into the package 50 again.

Next, a specific structure and a yarn joining operation of the yarn joining device 23 will be described with reference to fig. 3. As shown in fig. 3, the yarn joining device 23 includes a yarn joining nozzle 71, a pair of yarn collecting bars (yarn collecting portions) 72, a pair of yarn nipping portions (holding portions) 73, a yarn pressing bar 74, a pair of untwisting pipes 75, and a pair of cutters 76.

The yarn joining nozzle 71 is provided with a yarn joining hole 70. An ejection port, not shown, is formed inside the yarn joining hole 70. By ejecting the compressed air from the ejection port, a swirling air flow can be generated inside the yarn joining hole 70.

The yarn collecting bar 72, the yarn clamping portion 73, and the yarn pressing bar 74 are arranged in pairs with the yarn joining nozzle 71 interposed therebetween. The yarn accumulating bar 72 brings the first yarn and the second yarn guided to the yarn joining device 23 close to the yarn joining nozzle 71. The yarn clamping portion 73 clamps and holds predetermined portions of the first yarn and the second yarn in a state of being guided to the yarn joining nozzle 71. The yarn presser bar 74 presses the first yarn and the second yarn to position them when the yarn joining is performed by the yarn joining nozzle 71.

One untwisting tube 75 is provided for the first yarn and one untwisting tube 75 is provided for the second yarn. The compressed air is discharged into each untwisting pipe 75 from a compressed air passage, which is not shown.

The first yarn and the second yarn guided to the yarn joining device 23 are respectively brought close to the untwisting pipes 75 by the yarn accumulating rods 72 and held by the yarn nipping portions 73. The first yarn and the second yarn are cut into predetermined lengths by a cutter 76.

After the cutting of the yarn, the first yarn and the second yarn are untwisted by releasing the twist of the fiber at the yarn end by the air flow inside the respective untwisting pipes 75. When the untwisting of the yarn end ends, the yarn pressing operation of the yarn pressing lever 74 causes the first yarn and the second yarn to be drawn out from the respective untwisting pipes 75 and positioned in a state where they overlap each other in the yarn joining hole 70 of the yarn joining nozzle 71. In this state, compressed air is ejected into the yarn splicing hole 70, thereby generating a rotational flow of compressed air, twisting the first yarn and the second yarn to form a joint. When the formation of the joint is completed, the first yarn and the second yarn are released from being held by the yarn clamping portion 73, and the operations of the yarn collecting lever 72 and the yarn pressing lever 74 are released. In the present embodiment, since the yarn splicing is performed by the rotational flow of the compressed air, when the yarn splicing is normally performed, the portion where the splices are formed cannot be distinguished or is difficult to distinguish by visual observation. However, in the present specification, for convenience of description, the yarn of the part to which the yarn is spliced is referred to as a "splice".

A yarn monitoring device 25 is provided downstream of the yarn joining device 23. The yarn monitoring device 25 monitors the thickness of the advancing textile yarn 10 by means of an electrostatic capacitance sensor. As shown in fig. 4, the yarn monitoring device 25 includes a housing 80, a first air ejection portion (yarn separating member, air ejection portion) 82, a second air ejection portion (yarn separating member, air ejection portion) 83, and a cutter 85. The cutter 85 may be provided independently of the yarn monitoring device 25.

A slit-shaped recess 81 is formed in the housing 80. The textile yarn 10 travels inside the recess 81. The concave portion 81 is formed as a linear groove with one side opened, and the inside of the concave portion 81 serves as a detection region of the spun yarn 10. The cutter 85 is disposed upstream of the detection region in the yarn running direction.

The first air ejection portion 82 has a first ejection opening 82a formed in the inner wall of the recessed portion 81 on the back side. The first air ejection portion 82 can generate an air flow along the side wall of the groove-like recess 81 by ejecting air from the first ejection port 82a, and can blow the air toward the cutter 85 and the like.

A slit-shaped second air outlet 83a is formed in the second air ejection portion 83. The second air ejection portion 83 can blow air into the groove-shaped recess 81 in the direction of the arrow in fig. 4, that is, in a direction oblique to the width direction of the groove-shaped recess 81 and also oblique to the yarn running direction. The air jetted from the second air jetting port 83a of the second air jetting portion 83 is blown into the inside from the open side of the concave portion 81 and from the yarn running upstream side, and is obliquely blown to the side wall on the side of the concave portion 81. This generates a spiral air flow in the recess 81.

Thus, even if foreign matter such as lint and fibers intrudes into the recess 81, the foreign matter can be removed by blowing air from the first air ejection part 82 and the second air ejection part 83 to blow the foreign matter out of the recess 81.

The yarn monitoring device 25 generates the measured quality information of the spun yarn 10 to the unit controller (determination unit, control unit) 90. Thus, the unit controller 90 can determine whether or not the yarn splicing device 23 forms a normal yarn splice or determine a yarn defect (a portion where an abnormality occurs in the thickness or the like) in the spun yarn 10 during winding. When determining that the yarn splicing abnormality, the yarn defect, or the like is present, the unit controller 90 drives the cutter 85 (yarn cutting device) disposed near the yarn monitoring device 25 to cut the spun yarn 10. The yarn monitoring device 25 is not limited to the capacitance type sensor, and may monitor the thickness of the spun yarn 10 using a light transmission type sensor, for example. As the yarn defect, a foreign substance contained in the textile yarn 10 may be monitored. It is also possible to omit the cutter 85 and cut the textile yarn 10 by interrupting the production of the textile yarn 10 by the air textile device 9.

A winding portion 26 is disposed downstream of the yarn accumulating device 22. The winding unit 26 includes a swing arm 52, a winding drum 53, and a winding drum drive motor (rotation drive unit) 54. The yarn path from the yarn accumulating device 22 to the winding portion 26 is guided by being bent by the downstream guide 63. A suppression guide (suppression section) 64 is disposed in the vicinity of the downstream guide 63.

The swing arm 52 can rotatably support the winding tube 51 for winding the textile yarn 10. The rocker arm 52 is rotatable with its base end portion as a rotation center. Accordingly, even if the spun yarn 10 is wound around the winding tube 51 and the diameter of the package 50 is increased, the winding of the spun yarn 10 can be continued appropriately.

The winding drum 53 is rotated in contact with the outer peripheral surface of the winding tube 51 or the package 50 by the driving force of the winding drum driving motor 54 being transmitted. A traverse groove, not shown, is formed in the outer peripheral surface of the winding tube 53, and the spun yarn 10 can be traversed by the traverse groove with a predetermined width. Thus, the winding section 26 can wind the spun yarn 10 around the winding tube 51 while traversing, and form the package 50. As described above, in the present embodiment, since the winding drum drive motor 54 is provided for each of the weaving units 2, the winding drum 53 can be rotated at different speeds between the weaving units 2.

Next, the processing performed by the spinning unit 2 when a yarn break occurs or a yarn is cut will be described with reference to fig. 5 to 10. Note that the processing shown in the flowchart of fig. 5 is an example, and the order of the processing may be changed or two processing may be performed simultaneously.

When the yarn breakage occurs during the winding of the package 50 or when the spun yarn 10 is cut by the cutter 85, the spun yarn 10 is cut. When detecting the yarn breakage or yarn cutting (step S101), the spinning unit 2 stops the rotation of the package 50 using a package brake or the like (step S102), stops the drafting by the draft device 7, and stops the spinning by the air spinning device 9. The first guide 61 moves to a position away from the yarn accumulating device 22.

Next, an operation of capturing the cut yarn end and guiding the yarn end to the yarn splicing device 23 is performed (step S103). Specifically, as shown in fig. 7, the second catching guide 28 catches the second yarn by rotating upward. Thereafter, the winding section 26 rotates the package 50 in the reverse direction, and the second catching guide 28 rotates downward. Thereby, the second yarn is guided to a position where the yarn joining by the yarn joining device 23 is possible. The first catching guide 27 is moved to a position where the first yarn can be caught by rotating downward. Then, the draft by the draft device 7 is started again, and the spinning by the air spinning device 9 is started again, whereby the first yarn is sucked and caught by the first catching guide device 27. Thereafter, the first catching guide 27 rotates upward while sucking the first yarn. Thereby, the first yarn is guided to a position where the yarn joining device 23 can join the yarns. After that, the first guide 61 moves so as to approach the yarn accumulating device 22. This allows the spun yarn 10 to be hooked on the yarn hooking member 43 of the yarn accumulating device 22.

Subsequently, the yarn joining device 23 performs a yarn joining operation to form a joint between the first yarn and the second yarn (step S104). Then, the winding section 26 rotates the package 50 to wind the spun yarn 10. At this time, as shown in fig. 6A, the winding section 26 accelerates the package 50 at the first acceleration. The first acceleration is a value smaller than the second acceleration shown in fig. 6A and the acceleration in the conventional example shown in fig. 6B.

Next, the textile unit 2 performs yarn separation processing (step S106). The yarn detachment process refers to a process of applying a force to the textile yarn 10 to detach the textile yarn 10 from the detection area of the yarn monitoring device 25. In the present embodiment, the yarn separating process is performed by ejecting air from at least one of the first air ejecting section 82 and the second air ejecting section 83.

In the case where the yarn joining is successful, as shown in fig. 8, since the textile yarn 10 is continuous and tension is applied, it is not affected by the yarn separating process. When the yarn joining fails, the second yarn is separated from the yarn monitoring device 25 by performing the yarn separation process, as shown in fig. 9. The second yarn after being released from the yarn monitoring device 25 is guided by the restraining guide 64. This suppresses the movement of the second yarn, and facilitates the determination of the position of the yarn end of the second yarn.

By performing the yarn separation process as soon as possible, the failure of the yarn joining can be determined at an early timing. Therefore, for example, it is preferable to be performed after the yarn joining device 23 performs the process of forming the joint and after the slack of the spun yarn 10 generated when the spun yarn 10 is released disappears. It can also be done after the yarn clamp 73 releases the textile yarn 10 and before the yarn-gathering rod 72 releases the first and second yarns.

After the yarn escape process, the unit controller 90 judges whether or not the joint formed on the spun yarn 10 is normal (step S107). The unit controller 90 determines that the yarn splicing is normal when the yarn splicing of the spun yarn 10 detected by the yarn monitoring device 25 satisfies a predetermined condition (thickness, etc.). Alternatively, the unit controller 90 may determine that the yarn splicing is normal when the spun yarn 10 can be continuously detected for a predetermined time. When the yarn splicing detected by the yarn monitoring device 25 does not satisfy the predetermined condition or when the yarn monitoring device 25 does not detect the spun yarn 10, the unit controller 90 determines that the yarn splicing has failed (step S108).

When determining that the yarn splicing has failed, the unit controller 90 determines whether or not the yarn splicing has failed consecutively a predetermined number of times or more (step S109). When the textile unit 2 fails continuously for a predetermined number of times or more, the operator is notified of an error by a lamp, an alarm sound, or the like (step S110).

When the package 50 does not continuously fail more than a predetermined number of times, the winding section 26 stops the rotation of the package 50 (step S102). As described above, in the present embodiment, since the package 50 is rotated at the low first acceleration, the rotation speed of the package 50 when it is determined that the yarn splicing failure is caused is low. Therefore, the package 50 can be stopped before the yarn end of the second yarn is wound into the package 50. Therefore, as shown in fig. 10, the second catching guide 28 can attract and catch the yarn end in a state where the yarn end is separated from the package 50. Therefore, the probability of occurrence of a yarn end catching error can be reduced. Further, since whether or not the yarn joining is successful can be determined at an early timing, the amount of the yarn accumulating device 22 accumulated can be suppressed until the unit controller 90 determines that the yarn joining is successful. Therefore, the amount of the spun yarn 10 to be discarded can be reduced, and the winding efficiency can be improved. Thereafter, the spinning unit 2 performs the processing of step S102 and subsequent steps in the same manner as described above.

When the unit controller 90 determines that the joints are normal (when the determination in step S107 is yes), the winding unit 26 increases the rotation speed of the package 50 at the second acceleration (step S111, see fig. 6A). The second acceleration is a value larger than the first acceleration and the conventional acceleration.

Thereafter, the winding unit 26 determines whether or not the rotational speed of the package 50 has reached the target speed (step S112), and ends the acceleration of the package 50 when the rotational speed reaches the target speed (step S113). As described above, the acceleration of the package 50 is increased, so that the target speed can be reached in a short time.

Next, a modification of the above embodiment will be described with reference to fig. 11. In this modification, the structure of the spinning unit 2 is the same as that of the above embodiment. However, the present modification is different from the above embodiment in that the yarn separation process is performed after the yarn joining and before the package 50 is rotated.

As described above, if the failure of the yarn joining can be detected quickly, the package 50 can be stopped at a low speed, and therefore the yarn end of the second yarn is not easily wound into the package 50. Therefore, in the present modification, the yarn separation process is performed after the process of forming the yarn ends and before the package 50 is rotated. Further, after the process of forming the joint, the spun yarn 10 is slackened, and therefore there is a possibility that the spun yarn 10 is detached from the yarn monitoring device 25 by the yarn detachment process even in the case where the yarn splicing is successful. Therefore, it is necessary to apply tension to the spun yarn 10 by a tension applying device or the like.

When the yarn monitor 25 does not detect the spun yarn 10 by performing the yarn separation process, the yarn joining failure occurs. In this case, since the package 50 can be rotated without being wasted, the yarn splicing can be performed again at an early timing.

As described above, the spinning machine includes the air spinning device 9, the winding unit 26, the yarn joining device 23, the yarn monitoring device 25, and the unit controller 90. The air weaving device 9 feeds a weaving yarn 10. The winding section 26 has a winding drum driving motor 54 for rotating the package 50, and winds the spun yarn 10 supplied from the air spinning device 9 into the package 50. The yarn joining device 23 joins the first yarn from the air weaving device 9 and the second yarn from the winding portion 26. The yarn monitoring device 25 detects a portion to be spliced by the yarn splicing device 23, that is, a splice. The unit controller 90 determines whether or not the yarn splicing operation is normal based on the detection result of the yarn monitoring device 25. After the unit controller 90 determines that the joint is normal, the winding unit 26 increases the acceleration of the rotation speed of the package 50 to wind the package 50.

Thus, the acceleration of the package 50 is increased and the rotation speed of the package 50 is accelerated to the target speed after the joint is determined to be normal, and therefore the rotation speed of the package 50 until the joint is determined can be suppressed. Therefore, the yarn end is not easily wound into the package 50 in the case of a failed yarn joining. Therefore, for example, the yarn end of the package 50 can be reliably caught.

In the spinning machine of the present embodiment, an average acceleration during a period from when the winding unit 26 starts rotating the package 50 to when the unit controller 90 determines that the yarn splicing is performed after the yarn splicing device 23 performs yarn splicing is set as the first acceleration. The average acceleration during a period from when the unit controller 90 determines that the joint is normal to when the rotational speed of the package 50 reaches the target speed is set as the second acceleration. The winding section 26 changes the rotation speed of the package 50 so that the second acceleration is larger than the first acceleration.

Accordingly, the acceleration of the package 50 is low before the determination of the yarn splicing by the unit controller 90, and therefore the rotation speed of the package 50 after the yarn splicing failure can be suppressed.

In the spinning machine of the present embodiment, when the unit controller 90 determines that the yarn end is not formed or that the yarn end is abnormal, the winding unit 26 stops the winding of the package 50 before the yarn end is wound into the package 50.

This enables the yarn end of the package 50 to be reliably caught.

The spinning machine of the present embodiment includes the first air ejection portion 82 and the second air ejection portion 83, and the first air ejection portion 82 and the second air ejection portion 83 apply a force to the yarn in a direction in which the yarn is separated from the yarn monitoring device 25 after the yarn joining by the yarn joining device 23.

In the case of a failed yarn joining, the yarn is forced to come off from the yarn monitoring device 25 by the first air ejection portion 82 and the like, but in the case of a successful yarn joining, the yarn is not forced to come off even if the force is applied from the first air ejection portion 82 and the like. Therefore, by performing the yarn separating process, it is possible to determine whether or not the yarn joining is successful at an early timing.

The preferred embodiment and the modified examples of the present invention have been described above, but the above configuration can be modified as follows, for example.

In the above embodiment, the first air ejection part 82 and the second air ejection part 83 provided in the yarn monitoring device 25 have been described as the yarn separating member. However, the air ejection portion may be provided in another portion. Further, if the textile yarn 10 is configured to be applied with a force to such an extent that the force does not affect the yarn quality even when the yarn joining is successful, the solid may be brought into contact with the textile yarn 10 instead of the fluid such as air.

The unit controller 90 determines that the spun yarn 10 is not present when the yarn monitoring device 25 does not detect the spun yarn 10 for a predetermined time or more immediately after the yarn splicing and during the normal winding process. The judgment reference may be changed immediately after the yarn splicing and during the normal winding process. Immediately after the yarn splicing, the predetermined time is shortened, whereby the determination can be made quickly. As a result, the rotational speed of the package 50 when it is determined that the yarn joining has failed can be made lower.

It is also possible to provide separately means for judging the splice and means for monitoring the quality of the advancing textile yarn 10.

In the above embodiment, the first acceleration and the second acceleration are constant, but at least one of the first acceleration and the second acceleration may be changed. In this case, it is also preferable that the average acceleration in the time from the completion of the yarn splicing until the judgment of the joint normality be smaller than the average acceleration in the time from the judgment of the joint normality until the target speed is reached.

In the above embodiment, the unit controller 90 of the textile unit 2 determines the detection result of the yarn monitoring device 25. This determination may be performed by a control unit for controlling the yarn monitoring device 25, or may be performed by a machine control device.

In the above embodiment, the present invention is applied to a spinning machine that forms the package 50 above the spinning unit 2, but the present invention can also be applied to a spinning machine that forms the package 50 below the spinning unit 2 (see japanese patent application laid-open No. 2013-67892, etc.). The present invention can also be applied to a yarn winding machine such as an automatic winder. In this case, the structure for unwinding the yarn from the yarn supplying bobbin corresponds to the yarn supplying portion.

Claims

1. A yarn winding machine, comprising:

a yarn feeding section that feeds a yarn;

a winding section that has a rotation driving section that rotates a package, and that winds the yarn supplied by the yarn supplying section into the package;

a yarn joining device for joining the yarn from the yarn supplying section and the yarn from the winding section;

a detection unit that detects a joint that is a part to be spliced by the yarn splicing device;

a determination unit that determines whether the joint is normal or not based on a detection result of the detection unit; and

a yarn separating member that performs a yarn separating process of applying a force to the yarn in a direction in which the yarn is separated from the detecting portion after the yarn joining device performs the yarn joining,

the winding unit performs winding of the package by increasing the acceleration of the rotation speed of the package after the determination unit determines that the joint is normal.

2. The yarn winding machine of claim 1,

the winding unit stops winding of the package when the determination unit determines that the joint is not formed or the joint is abnormal.

3. The yarn winding machine of claim 2,

when the determination unit determines that the yarn end is not formed or that the yarn end is abnormal, the winding unit stops winding the package before the yarn end is wound around the package.

4. The yarn winding machine of claim 1,

the yarn separating member is an air ejecting section that ejects air to a yarn path of the yarn wound into the package.

5. The yarn winding machine of claim 2,

6. The yarn winding machine of claim 3,

7. The yarn winding machine according to any one of claims 1 to 6,

the yarn separating member performs the yarn separating process after the winding of the package by the winding section is started and after the slack of the yarn, which is generated when the yarn is released by the yarn joining device, is eliminated.

8. The yarn winding machine according to any one of claims 1 to 6,

the yarn joining device includes a holding portion for holding a yarn to be joined and a yarn gathering portion for pulling the yarn held by the holding portion,

the yarn separating member performs the yarn separating process after the holding portion releases the yarn and before the yarn accumulating portion releases the yarn.

9. The yarn winding machine according to any one of claims 1 to 6, comprising:

a suppressing unit that suppresses an operation of the yarn after the yarn separating process by the yarn separating member; and

and a catching and guiding device that catches the yarn from the package that is restrained by the restraining section and guides the yarn to the yarn splicing device.

10. The yarn winding machine according to claim 7, comprising:

11. The yarn winding machine according to claim 8, comprising:

12. The yarn winding machine according to any one of claims 1 to 6,

the yarn winding device is provided with a yarn accumulating device that accumulates the yarn between the yarn supplying section and the winding section.

13. The yarn winding machine of claim 7,

14. The yarn winding machine of claim 8,

15. The yarn winding machine of claim 9,

16. The yarn winding machine of claim 10,

17. The yarn winding machine of claim 11,

18. The yarn winding machine according to any one of claims 1 to 6,

the yarn splicing device is provided with a control unit for controlling at least the winding unit, the yarn splicing device, and the detection unit.

19. The yarn winding machine of claim 7,

20. The yarn winding machine of claim 8,

21. The yarn winding machine of claim 9,

22. The yarn winding machine of claim 10,

23. The yarn winding machine of claim 11,

24. The yarn winding machine of claim 12,

25. The yarn winding machine of claim 13,

26. The yarn winding machine of claim 14,

27. The yarn winding machine of claim 15,

28. The yarn winding machine of claim 16,

29. The yarn winding machine of claim 17,