JP2023142135A - Yarn winding machine - Google Patents

Abstract

To provide a yarn winding machine including a capturing device which can capture a yarn on a package side with high probability.SOLUTION: A spinning machine includes: a spinning device 22; a yarn storage device 23; a winding device 25; a capturing device 24; and a unit control section. The spinning device 22 supplies a yarn 5. The yarn storage device 23 draws the yarn 5 from the spinning device 22. The winding device 25 winds the yarn 5 supplied by the spinning device 22 so as to form a package 7. The capturing device 24 is arranged at a position between the yarn storage device 23 and the winding device 25 in a yarn traveling direction and a position where the yarn 5 on a yarn path from the yarn storage device 23 up to the winding device 25 can be sucked, and sucks and captures the yarn 5 on the package 7 side when the yarn 5 is separated. The unit control section performs control for reducing tension of the yarn 5 between the yarn storage device 23 and the package 7 in a capturing standby period after the yarn 5 is separated and before the yarn 5 on the package 7 side is captured by the capturing device 24.SELECTED DRAWING: Figure 5

Description

The present invention mainly relates to a yarn winding machine equipped with a capturing device that suctions and captures yarn.

Patent Documents 1 and 2 disclose a spinning machine that is a type of yarn winding machine. A spinning machine winds up yarn produced by a spinning device using a winding device to form a package. The spinning machine also includes a yarn storage device, a suction pipe, a suction mouth, and a splicer. The yarn storage device stores yarn between the spinning device and the winding device. When the yarn is cut, the suction pipe moves close to the spinning device, suctions and captures the yarn on the spinning device side, and guides it to the splicer. When the yarn is cut, the suction mouse moves close to the package, suctions and captures the yarn on the package side, and guides it to the splicer. The splicer splices the yarn on the spinning device side and the yarn on the package side.

JP2014-88638A Japanese Patent Application Publication No. 2011-37572

In the spinning machines disclosed in Patent Documents 1 and 2, the yarn wound around the surface of the package is sucked by a suction mouth. Therefore, for example, if the thread is stuck to the surface of the package, there is a possibility that the package side may fail to capture the thread. This problem is not limited to spinning machines, but similar problems exist in other yarn winding machines such as automatic winders.

The present invention has been made in view of the above circumstances, and its main purpose is to provide a yarn winding machine equipped with a catching device that can catch yarn on the package side with high probability.

Means and effects for solving problems

The problem to be solved by the present invention is as described above, and next, the means for solving this problem and the effects thereof will be explained.

According to the aspect of the present invention, a yarn winding machine having the following configuration is provided. That is, the yarn winding machine includes a yarn feeding section, a pulling device, a winding device, a catching device, and a control section. The yarn feeding section supplies yarn. The drawing device draws out the yarn from the yarn feeding section. The winding device winds up the yarn supplied by the yarn feeding section to form a package. The catching device is located between the drawing device and the winding device in the yarn traveling direction, and is arranged at a position where it can suck the yarn on the yarn path from the drawing device to the winding device. If the yarn is separated, the yarn on the package side is suctioned and captured. The control unit reduces the tension of the yarn between the drawing device and the package during a capture waiting period after the yarn is separated and before the yarn on the package side is captured by the capturing device. Take control.

As a result, since the catching device catches the thread between the drawing device and the package, it is easier to catch the thread on the package side than when catching the thread stuck to the package. Furthermore, the tension of the thread between the drawing device and the package is reduced, which makes it easier for the suction flow of the capture device to act on the thread. As a result, the yarn on the package side can be captured with high probability.

The yarn winding machine described above preferably has the following configuration. That is, the drawing device includes a thread accumulating roller and a thread hooking member. The yarn storage roller is disposed downstream of the yarn feeding section in the yarn running direction and upstream of the winding device in the yarn running direction, and winds the yarn around the outer peripheral surface and temporarily stores the yarn. The yarn hooking member rotates integrally with the yarn accumulating roller while in contact with the yarn, thereby winding the yarn around the outer peripheral surface of the yarn accumulating roller.

Thereby, since the yarn is stored in the yarn storage roller, it is possible to secure time until the end of the yarn on the package side passes through the catching device after the yarn is separated. Therefore, control to reduce thread tension can be easily performed.

In the yarn winding machine, the control unit reduces the tension of the yarn between the drawing device and the package by rotating the package in the opposite direction with respect to the yarn winding direction during the capture standby period. It is preferable to do so.

Thereby, thread tension can be reduced through simple processing. Moreover, the degree to which the tension is reduced and/or the degree to which the thread is loosened can be adjusted by simply changing the amount of reverse rotation of the package.

In the yarn winding machine, it is preferable that the control unit reversely rotates the package so that a yarn of 20 mm or more is unwound from the package during the capture standby period.

This allows the yarn to be greatly loosened, making it easier for the suction flow of the catching device to act on the yarn.

In the yarn winding machine, it is preferable that the control section adjusts the amount of reverse rotation of the package depending on the type of yarn.

As a result, even if the yarn is of a type that is difficult to be attracted by the catching device, by increasing the amount of reverse rotation, the catching device can catch the yarn on the package side with high probability.

The yarn winding machine described above preferably has the following configuration. That is, the yarn winding machine includes a yarn monitoring device that monitors the condition of the yarn. The control unit increases the amount of reverse rotation of the package when the yarn defect detected by the yarn monitoring device is a long defect than when the yarn defect detected by the yarn monitoring device is a short defect.

Thereby, even if the yarn defect is long, the yarn defect can be removed from the yarn by increasing the amount of reverse rotation.

The yarn winding machine described above preferably has the following configuration. That is, the yarn winding machine further includes a yarn removing member that acts on the yarn to remove the yarn from the yarn hooking member. In the catching standby period, the control unit controls the winding speed of the package to be slower than the yarn feeding speed of the yarn accumulating roller in a state where the yarn is removed from the yarn hooking member by the yarn removing member. reducing thread tension between the withdrawal device and the package;

This allows the tension of the thread to be reduced using the drawing device.

The yarn winding machine described above preferably has the following configuration. That is, the yarn winding machine further includes a nullifying means for nullifying the action of the yarn hooking member on the yarn. The disabling means may include a stopper that stops the rotation of the threading member by contacting the threading member, and a stopper that stops the rotation of the threading member independently of the rotation of the thread storage roller. and a motor that is capable of stopping the threading member at a position retracted from the thread. The control unit is configured to cause the winding speed of the package to be lower than the yarn feeding speed of the yarn accumulating roller during the acquisition standby period, with the nullifying means invalidating the action of the yarn hooking member on the yarn. This reduces thread tension between the withdrawal device and the package.

This allows the tension of the thread to be reduced using the drawing device.

In the yarn winding machine, it is preferable that the control unit increases the yarn feeding speed of the yarn accumulating roller after decreasing the winding speed of the package to be slower than the yarn feeding speed of the yarn accumulating roller.

Thereby, the remaining yarn on the yarn storage roller can be removed in a short time while reducing the tension of the yarn using the winding device.

The yarn winding machine described above preferably has the following configuration. That is, the yarn winding machine includes a yarn splicing device that splices the yarn on the yarn feeding section side and the yarn on the package side. The control unit is configured to stop the package after the capturing device has completed capturing the yarn on the package side and stopping the rotation of the package, and until the yarn splicing device has completed the yarn splicing. maintain.

As a result, the time required for piecing can be shortened compared to the case where the package is rotated in the opposite direction immediately before splicing.

In the yarn winding machine described above, it is preferable that the capturing device suctions and captures the middle portion of the yarn while the yarn is connected between the pull-out device and the package.

Thereby, the catching device can catch the yarn before the yarn end becomes free, so it can capture the yarn on the package side with high probability.

1 is a front view showing the overall configuration of a spinning machine according to an embodiment of the present invention. FIG. 3 is a side view of a spinning unit and a yarn splicing cart. 5 is a flowchart showing a process corresponding to thread division. FIG. 3 is a side view of the spinning unit and the yarn splicing cart showing the state immediately after cutting the yarn. FIG. 3 is a side view of the spinning unit and the yarn splicing cart showing a state in which the yarn is captured by the capturing device. FIG. 3 is a side view of the spinning unit and the yarn splicing cart, showing a state in which the yarn on the package side and the yarn on the yarn supplying section are guided to the yarn splicing device. FIG. 3 is a side view of the spinning unit and the splicing cart, showing a state in which yarn on the package side and yarn on the yarn feeder side are spliced. 12 is a flowchart showing processing corresponding to thread division in a modified example.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A spinning machine (yarn winding machine) 1 according to an embodiment of the present invention will be described with reference to the drawings. In the following description, "upstream side" and "downstream side" mean the upstream side and the downstream side in the running direction of the thread 5, the sliver 4a, or the fiber bundle 4b, respectively.

As shown in FIG. 1, the spinning machine 1 includes a blower box 111, a control box 112, a plurality of spinning units 2, and a yarn splicing cart 80. The plurality of spinning units 2 are arranged side by side in a predetermined direction (parallel direction). Each spinning unit 2 performs spinning to generate yarn 5 and form a package 7.

Inside the blower box 111, a blower 113 and the like that function as a negative pressure source are arranged. A central control device 115, a display section 116, and an operation section 117 are arranged in the control box 112.

The central control device 115 centrally manages and controls each part of the spinning machine 1. The central control device 115 is connected to a unit control section 15 (FIG. 2, control section) included in each spinning unit 2 via an unillustrated signal line. In this embodiment, each spinning unit 2 includes a unit control section 15, but a predetermined number (for example, two or four) of spinning units 2 may share one unit control section 15. The central control device 115 and the unit control section 15 are each configured as a known computer having a CPU, ROM, RAM, etc. (not shown).

The display section 116 can display settings for the spinning units 2 and/or information regarding the status of each spinning unit 2. The operation unit 117 is operated by an operator to configure settings for the spinning machine 1 and/or to select information to be displayed on the display unit 116. The display unit 116 and the operation unit 117 may be configured with a touch panel display.

As shown in FIG. 2, each spinning unit 2 includes a draft device 21, a spinning device 22, a yarn storage device (pull-out device) 23, a catching device 24, and a winding device 25. These devices are arranged in order from the upstream side to the downstream side in the yarn running direction.

The yarn splicing cart 80 is movably provided with respect to each spinning unit 2. One yarn splicing cart 80 is provided for each of the plurality of spinning units 2. Although one yarn splicing truck 80 is illustrated in FIG. 1, the spinning machine 1 may include a plurality of yarn splicing trucks 80. The yarn splicing cart 80 includes a yarn splicing device 82, a suction pipe 83, and a suction mouth 84, as will be described later.

The draft device 21 is provided above the spinning unit 2. The draft device 21 includes a plurality of draft roller pairs. Each draft roller pair is composed of two draft rollers.

Specifically, the draft device 21 includes four draft roller pairs. The four draft roller pairs are a back roller pair 41, a third roller pair 42, a middle roller pair 43, and a front roller pair 44, which are arranged in order from the upstream side to the downstream side. An apron belt 45 is provided on each draft roller of the middle roller pair 43.

Each of the four draft roller pairs has a driving roller and a driven roller that face each other. Regarding the four draft roller pairs, each drive roller is provided with a drive unit such as a motor (not shown). Each drive roller is rotationally driven around the axis of the drive roller by a drive section. In this embodiment, a driving section for a driving roller is provided for each spinning unit 2. Therefore, the draft roller pair of a certain spinning unit 2 can operate independently with respect to the draft roller pairs of other spinning units 2. Note that the draft roller pairs of a plurality of spinning units 2 may be driven by a common drive unit.

The draft device 21 draws the sliver 4a supplied from a sliver supply section (not shown) until it reaches a predetermined fiber amount or thickness by sandwiching and conveying the sliver 4a between the driving roller and the driven roller of each draft roller pair. (drafting) to generate a fiber bundle 4b. The fiber bundle 4b generated by the draft device 21 is supplied to the spinning device 22.

The spinning device 22 is an air spinning device in this embodiment. The spinning device 22 applies a swirling air flow to the fiber bundle 4b generated by the draft device 21 to twist the fiber bundle 4b to generate the yarn 5. The spinning device 22 is arranged downstream of the draft device 21.

The spinning device 22 supplies the generated yarn 5 to the downstream side. Since the spinning device 22 supplies the yarn 5, it corresponds to a yarn feeding section. The yarn 5 produced by the spinning device 22 travels from the spinning device 22 toward the winding device 25 and is wound up by the winding device 25. A yarn path along which the yarn 5 travels is formed between the spinning device 22 and the winding device 25.

The yarn storage device 23 pulls out the yarn 5 produced by the spinning device 22 from the spinning device 22 and temporarily stores it. The yarn storage device 23 is arranged downstream of the spinning device 22 and upstream of the winding device 25.

The yarn storage device 23 includes a yarn storage roller 51, an electric motor 52, a thread hooking member 53, a thread removal member 55, and a storage amount sensor 56.

The yarn storage roller 51 is rotationally driven by an electric motor 52. The yarn storage roller 51 winds the yarn 5 around its outer peripheral surface and temporarily stores it. The yarn accumulating roller 51 can draw out the yarn 5 from the spinning device 22 at a predetermined speed by rotating at a predetermined rotational speed with the yarn 5 wound around its outer peripheral surface.

The thread hooking member 53 is capable of hooking the thread 5. The thread hooking member 53 is supported so as to be rotatable relative to the thread storage roller 51. Torque (resistance torque) that resists rotation relative to the yarn accumulating roller 51 is applied to the yarn hooking member 53 by a torque generating means such as a magnetic means. As a result, if the tension applied to the yarn 5 is strong enough to overcome this resistance torque, the yarn hooking member 53 rotates independently of the yarn accumulating roller 51 and unwinds the yarn 5 from the yarn accumulating roller 51. If the tension applied to the yarn 5 is weaker than the resistance torque, the yarn hooking member 53 rotates integrally with the yarn accumulating roller 51 and winds the yarn 5 around the yarn accumulating roller 51. Note that a drive unit that rotationally drives the threading member 53 may be provided.

The thread removal member 55 is arranged near the thread storage roller 51. The thread removing member 55 can perform a thread removing operation to remove the thread 5 from the thread hooking member 53. The thread removing member 55 is configured as an L-shaped member as shown in FIG. 1, and its end portion is rotatably supported.

The thread removing member 55 is provided movably between the position shown in FIG. 2 (retracted position) and the position shown in FIG. 6 (thread removing position). The thread removing member 55 passes through a space downstream of the thread storage roller 51 in the process of moving from the retracted position to the thread removing position. At this time, if there is a thread 5 caught on the thread hooking member 53, the thread removing member 55 acts on the thread 5, and the thread 5 is removed from the thread hooking member 53. By removing the thread 5 from the thread hooking member 53, the thread 5 wound around the thread accumulating roller 51 is unwound from the thread accumulating roller 51.

The thread removing member 55 is provided in each spinning unit 2, and a separate drive unit (such as a motor or an air cylinder) is provided for each thread removing member 55. The drive section of the thread removing member 55 is controlled by a unit control section (control section) 15. Therefore, the thread removing member 55 can operate independently with respect to the thread removing members 55 of other spinning units 2.

The storage amount sensor 56 detects the amount of yarn stored in the yarn storage roller 51. The storage amount sensor 56 is arranged so as to face an appropriate position on the outer peripheral surface of the yarn storage roller 51. The storage amount sensor 56 detects the presence or absence of the thread 5 at this position (detection position). The storage amount sensor 56 transmits a detection signal indicating the presence or absence of the yarn 5 at the detection position to the unit control section 15.

The yarn storage device 23 can temporarily store the yarn 5 on the outer peripheral surface of the yarn storage roller 51, and thus functions as a kind of buffer for the yarn 5. This eliminates problems caused by the spinning speed in the spinning device 22 and the winding speed (traveling speed of the yarn 5 wound into the package 7) not matching for some reason (for example, the yarn 5 becomes loose). be able to.

A yarn monitoring device 47 is provided between the spinning device 22 and the yarn storage device 23. The yarn monitoring device 47 detects the state of the yarn 5 upstream of the yarn storage device 23 (on the spinning device 22 side). The yarn 5 produced by the spinning device 22 passes through a yarn monitoring device 47 before being stored by the yarn storage device 23.

The yarn monitoring device 47 monitors the quality of the traveling yarn 5 using an optical sensor and detects yarn defects included in the yarn 5. Examples of yarn defects include abnormal thickness of the yarn 5 and/or foreign matter contained in the yarn 5. When the yarn monitoring device 47 detects a yarn defect in the yarn 5, it transmits a yarn defect detection signal to the unit control section 15. The yarn monitoring device 47 may monitor the quality of the yarn 5 using, for example, a capacitive sensor instead of an optical sensor. The yarn monitoring device 47 may be configured to detect an abnormality in the tension of the yarn 5 as a yarn defect.

The unit control section 15 determines whether or not to cut the thread 5 based on the detection result of the thread monitoring device 47. The cutting of the yarn 5 is achieved by the unit control section 15 controlling the spinning device 22 to stop spinning. Cutting of the thread 5 may be realized by stopping drafting by the drafting device 21 (for example, rotation of the back roller pair 41). Even when the supply of the fiber bundle 4b from the draft device 21 to the spinning device 22 is stopped, spinning by the spinning device 22 is substantially interrupted. The spinning unit 2 may be provided with a cutter, and the unit control section 15 may cut the yarn 5 using the cutter. Even when the yarn 5 is cut by the cutter, the unit control section 15 controls the spinning device 22 to substantially interrupt spinning.

The catching device 24 sucks the yarn 5 on the package 7 side when the yarn 5 is separated between the spinning device 22 and the winding device 25. The catching device 24 is arranged downstream of the yarn storage device 23 and upstream of the winding device 25. Furthermore, the catching device 24 is arranged at a position where it can suck the yarn 5 on the yarn path from the yarn storage device 23 to the winding device 25. On the other hand, the suction mouth 84 is placed at a position away from the yarn path from the yarn storage device 23 to the winding device 25 in the standby state. In this embodiment, the catching device 24 is fixed so that its distance to the yarn path does not change, but it may be movable to some extent. For example, the catching device 24 may be movable slightly toward and away from the yarn path. In other words, the movable length of the capture device 24 is shorter than the movable length of the suction mouse 84. When the yarn splicing cart 80 described below operates on the spinning unit 2, the catching device 24 is located upstream of the yarn splicing device 82 included in the yarn splicing cart 80. The catching device 24 can catch the yarn 5 on the package 7 side on the upstream side of the yarn splicing device 82 when the yarn 5 breaks down downstream of the spinning device 22 and upstream of the catching device 24.

When the yarn 5 is split, the unit control section 15 determines whether to use the catching device 24 or not, and controls the catching device 24 as appropriate based on the determination. The catching device 24 and the suction mouth 84 are selectively used for catching the yarn 5 on the package 7 side. Therefore, the use of the capture device 24 means the non-use of the suction mouse 84, and the non-use of the capture device 24 means the use of the suction mouse 84.

The catching device 24 includes a suction tube 61 and a thread catching detection sensor 63. A suction port 62 is formed at the tip (one longitudinal end) of the suction tube 61 . The suction port 62 opens toward a yarn path formed in the spinning unit 2. The suction port 62 of the capturing device 24 may be provided to open toward the thread path for capturing. The suction pipe 61 is connected to a negative pressure source such as a blower 113 via piping or the like. Thereby, a suction flow (suction force) can be generated in the suction port 62 (inside the suction tube 61). A shutter (not shown) may be provided in the capture device 24, and the suction flow may be generated at the suction port 62 by opening the shutter when necessary. The yarn capture detection sensor 63 is arranged immediately downstream of the suction port 62 of the capture device 24 in this embodiment. The yarn capture detection sensor 63 detects whether the yarn 5 on the package 7 side is captured by the capturing device 24 or not.

A yarn guide 48 and a waxing device 49 are provided downstream of the yarn storage device 23 and upstream of the winding device 25.

The yarn guide 48 is arranged downstream of the yarn storage roller 51. The thread guide 48 contacts and guides the thread 5 so that the thread 5 follows the thread path.

The waxing device 49 holds wax to be applied to the thread 5. The waxing device 49 waxes the yarn 5 running between the yarn storage device 23 and the winding device 25 . When winding the package 7 without applying wax to the yarn 5, the entire waxing device 49 may be removed from the spinning unit 2, or only the wax may be removed from the waxing device 49.

The winding device 25 winds up the yarn 5 that has passed through the yarn storage device 23 to form a package 7. The winding device 25 is arranged downstream of the yarn storage device 23.

The winding device 25 includes a cradle device 71, a package rotation device 72, and a traverse device 73.

The cradle device 71 includes a pair of cradle arms 74. The cradle device 71 can rotatably support a bobbin 7a for winding the thread 5 (and thus the package 7) between a pair of cradle arms 74. Cradle arm 74 can rotate around support shaft 75 .

The package rotation device 72 includes a winding drum 76 and a drum drive motor 77. The winding drum 76 can come into contact with the bobbin 7a or the outer peripheral surface of the package 7. The output shaft of the drum drive motor 77 is connected to the winding drum 76 by appropriate means. By driving the winding drum 76 with the drum drive motor 77, the package 7 can be rotated in the winding direction. The drum drive motor 77 is configured to be able to rotate in forward and reverse directions. Therefore, it is possible to rotate the package 7 in a direction opposite to the winding direction (reverse rotation).

The traverse device 73 includes a traverse guide 78 and a traverse drive motor 79. The traverse guide 78 can hook the yarn 5 wound around the package 7. The traverse guide 78 can reciprocate in the winding width direction of the package 7 . The output shaft of the traverse drive motor 79 is connected to the traverse guide 78 by appropriate means. By driving the traverse guide 78 reciprocatingly by the traverse drive motor 79 while the traverse guide 78 holds the yarn 5, the yarn 5 wound around the package 7 can be traversed.

The winding device 25 rotates the winding drum 76 of the package rotation device 72 while reciprocating the traverse guide 78 of the traverse device 73. Thereby, the winding device 25 winds the yarn 5 into the package 7 while traversing the yarn 5.

In this embodiment, a single drum drive motor 77 is provided for a single winding drum 76 of each spinning unit 2. Further, a single traverse drive motor 79 is provided for a single traverse guide 78 of each spinning unit 2. Therefore, the winding drum 76 and the traverse guide 78 can operate independently with respect to the winding drum 76 and the traverse guide 78 of the other spinning units 2.

As shown in FIG. 1, the spinning machine 1 is provided with a rail 101. The rail 101 is arranged so as to extend along the direction in which the plurality of spinning units 2 are lined up. The yarn splicing cart 80 is configured to be able to run on the rails 101. Thereby, the yarn splicing cart 80 can be moved relative to the plurality of spinning units 2.

The yarn splicing cart 80 travels to a working position corresponding to the spinning unit 2 where the yarn 5 has been split, and performs the yarn splicing process in the spinning unit 2. The yarn splicing cart 80 performs this yarn splicing process in cooperation with the capturing device 24 and the like provided in the spinning unit 2, or by using a device included in the yarn splicing cart 80.

The yarn splicing cart 80 includes running wheels 81, a yarn splicing device 82, a suction pipe 83, a suction mouth 84, and a cart control section 85.

The running wheels 81 are configured to be rotatably driven by an unillustrated driving means (for example, a motor). By driving the traveling wheels 81, the yarn splicing cart 80 can travel to each of the plurality of spinning units 2.

The suction pipe 83 is a member having a pipe-shaped portion. An opening is formed at the tip of the suction pipe 83. The suction pipe 83 is connected to an appropriate negative pressure source (for example, a blower 113). Therefore, a suction flow can be generated at the opening at the tip of the suction pipe 83. Suction pipe 83 is rotatably supported. By rotating the suction pipe 83, the opening at its tip can be brought closer to the spinning device 22, and the yarn 5 on the yarn feeding section side (the yarn 5 on the spinning device 22 side) can be captured.

The suction mouth 84 is a member having a pipe-shaped portion. An opening is formed at the tip of the suction mouth 84. The suction mouth 84 is connected to a negative pressure source such as a blower 113. Therefore, a suction flow can be generated at the opening at the tip of the suction mouth 84. Suction mouse 84 is rotatably supported. By rotating the suction mouth 84, the opening at its tip can be brought closer to the winding device 25 and the thread 5 on the package 7 side can be captured.

The yarn splicing device 82 includes a yarn splicing section 82a and cutters 82b and 82c. The yarn splicing device 82 can take in the yarn 5 on the yarn supplying section side and the yarn 5 on the package 7 side by operating a yarn shifting lever (not shown). The cutter 82b cuts the yarn 5 on the package 7 side between the yarn joining section 82a and the catching device 24 or the suction mouth 84. The cutter 82c cuts the yarn 5 on the yarn feeding section side between the yarn splicing section 82a and the suction pipe 83. The yarn splicing section 82a splices the yarn 5 on the yarn supplying section side and the yarn 5 on the package 7 side. In this embodiment, the yarn splicing device 82 is a splicer device that twists yarn ends together using a swirling air flow. The yarn splicing device 82 is not limited to the above-described splicer device, and may be, for example, a mechanical knotter.

The trolley control unit 85 is configured as a known computer having a CPU, ROM, RAM, etc. (not shown). The trolley control section 85 controls the yarn splicing process performed by the yarn splicing trolley 80 by controlling the operations of each section included in the yarn splicing trolley 80 .

Next, with reference to FIGS. 3 to 7, the flow of processing for dividing the thread 5 using the catching device 24 will be described.

In the following explanation, a situation will be explained in which a yarn defect is detected and the yarn 5 is cut. However, the same situation can also occur when the yarn 5 is cut due to strong tension being applied to the yarn 5 in the spinning device 22 or the drafting device 21, etc. Processing takes place. Further, in the following description, it is assumed that the unit control section 15 decides to use the capture device 24 at an appropriate timing.

As described above, the unit control section 15 determines whether or not the yarn 5 has a yarn defect based on the detection result of the yarn monitoring device 47 (S101). If the unit control section 15 determines that the yarn 5 has a yarn defect, it stops spinning by the spinning device 22 and cuts the yarn 5 (S102). FIG. 4 shows the state immediately after the thread 5 is cut.

Here, the difficulty of capturing the yarn 5 by the capturing device 24 will be explained. The capturing device 24 sucks and captures the yarn 5 located between the yarn accumulating device 23 and the winding device 25. However, since the thread 5 is under tension for winding, the thread 5 is in a taut state, and the suction flow is difficult to act on the thread 5. Therefore, the thread 5 may fail to be caught. In order to solve this problem, the unit control section 15 performs control to reduce the tension of the thread 5. The control to reduce the tension of the yarn 5 is performed during a capture standby period, which is a period after the yarn 5 is separated and before the yarn 5 on the package 7 side is captured by the capture device 24.

After cutting the thread 5, the unit control section 15 determines whether it is time to reduce the tension (S103). Immediately after cutting the yarn 5, a large amount of yarn 5 is stored in the yarn storage device 23. The yarn 5 (particularly the yarn 5 on the downstream side) stored in the yarn storage device 23 does not contain any yarn defects. Therefore, the unit control section 15 waits to execute the tension reducing control until a certain amount of the yarn 5 stored in the yarn storage device 23 is wound around the package 7. For example, the unit control section 15 determines that the tension reduction timing has come when a predetermined period of time has elapsed since the storage amount sensor 56 detected that there was no yarn 5. However, the unit control section 15 may determine that the tension reduction timing has come when a predetermined time has elapsed since the yarn 5 was cut, or when the storage amount sensor 56 detects that there is no yarn 5. .

When determining that the tension reduction timing has come, the unit control section 15 causes the catching device 24 to generate a suction flow (S104), and causes the yarn storage roller 51 to rotate and the winding device 25 to rotate the package 7 in the winding direction. After stopping, reverse rotation of the package 7 by the winding device 25 is started (S105). The processes in steps S104 and S105 may be started at the same time, or either process may be started first. By rotating the package 7 in the opposite direction while the rotation of the yarn accumulating roller 51 is stopped, the tension of the yarn 5 between the yarn accumulating device 23 and the package 7 is reduced, and the yarn 5 becomes slack. As a result, the thread 5 becomes more susceptible to the suction flow of the catching device 24 and becomes more likely to be caught by the catching device 24. Note that stopping the rotation of the yarn accumulating roller 51 is not essential, and the package 7 may be rotated in the opposite direction while the yarn accumulating roller 51 is kept rotating. The rotational speed of the yarn storage roller 51 in this case may be the same speed as before, may continue to be decelerated, or may be maintained at a low speed after deceleration. FIG. 5 shows a state in which the thread 5 is captured by the capture device 24. As shown in FIG. 5, in this embodiment, while the yarn 5 is connected between the yarn storage device 23 and the package 7, the middle portion of the yarn 5 is sucked and captured by the capture device 24.

Thereafter, the rotation of the yarn accumulating roller 51 is restarted, and by continuing to unwind the yarn 5 from the yarn accumulating roller 51, the yarn end of the yarn 5 on the package 7 side is captured by the capturing device 24. Further, since the catching device 24 catches the yarn 5, the yarn 5 on the package 7 side is located near the yarn splicing device 82. In order to position the yarn 5 on the package 7 side near the yarn splicing device 82, the yarn splicing device 82 may be provided so as to be movable in the front-rear direction with respect to the yarn path.

Next, the unit control section 15 determines whether the amount of reverse rotation exceeds a threshold value (S106). By increasing the amount of reverse rotation, the thread 5 captured and held by the capturing device 24 becomes longer. As a result, the thread 5 is stably held by the catching device 24, or in other words, the thread 5 is difficult to come off from the catching device 24. For example, it is preferable that a threshold value for the amount of reverse rotation is set such that the length of the yarn 5 unwound from the package 7 is 20 mm or more, and it is more preferable that a threshold value for the amount of reverse rotation is set such that the length of the yarn 5 that is unwound from the package 7 is 30 mm or more and 100 mm or less. .

Further, the unit control section 15 adjusts the threshold value of the amount of reverse rotation according to the type of thread 5. If the thread 5 is of a type that is difficult to be attracted by the catching device 24, it is preferable to increase the threshold value of the amount of reverse rotation. For example, the suction flow does not easily act on the yarn 5 having a small count (thick yarn 5). Therefore, the unit control section 15 adjusts the threshold value of the amount of reverse rotation, based on the count of the yarn 5 received from the central control device 115, for example. Further, instead of or in addition to the count of the thread 5, the threshold value of the amount of reverse rotation may be adjusted based on the material of the thread 5.

Further, the unit control section 15 may adjust the threshold value of the amount of reverse rotation depending on the length of the yarn defect. For example, when the yarn defect is a long defect, it is preferable to increase the threshold value of the amount of reverse rotation in order to remove all yarn defects. Therefore, the unit control section 15 sets the threshold for the amount of reverse rotation when the yarn defect is a long defect to be larger than the threshold for the amount of reverse rotation when the yarn defect is a short defect (for example, a slab or a nep). The unit control section 15 determines that the yarn defect is a long defect when the length of the detected yarn defect is greater than or equal to a predetermined value, and determines that it is a short defect when the length of the detected yarn defect is less than the predetermined value. In this embodiment, the length of the yarn defect is divided into two stages, but it may be divided into three or more stages.

If the unit control section 15 determines that the amount by which the package 7 is rotated in the reverse direction has reached the threshold value for the amount of reverse rotation, the unit control section 15 stops the reverse rotation of the package 7 (S107). Any one of the above-mentioned methods for determining the threshold value of the amount of reverse rotation may be employed, or two or more methods may be combined. Note that the process of predetermining the threshold value of the amount of reverse rotation is not essential and may be omitted. In this case, the package 7 may be rotated in the reverse direction until the yarn capture detection sensor 63 detects the yarn 5.

Next, the unit control section 15 instructs the cart control section 85 to capture the yarn 5 on the yarn feeding section side by the suction pipe 83 and guide it to the yarn splicing device 82 (S108). Specifically, by rotating the suction pipe 83, the opening at its tip approaches the vicinity of the spinning device 22. Thereafter, when the spinning device 22 restarts spinning, the suction pipe 83 sucks and captures the yarn 5 produced by the spinning device 22. Thereafter, the suction pipe 83 moves to the yarn guide position while capturing the yarn 5, so that the yarn 5 on the yarn feeding section side is guided to the vicinity of the yarn splicing device 82. In this series of operations, the yarn 5 on the yarn feeding section side comes to be stored in the yarn storage roller 51 again. FIG. 6 shows a state in which the yarn 5 on the package 7 side and the yarn 5 on the yarn supplying section side are guided to the yarn splicing device 82.

Next, the unit control section 15 instructs the cart control section 85 to cause the yarn splicing device 82 to splice the yarn 5 on the package 7 side and the yarn 5 on the yarn supplying section side (S109). The detailed process of yarn splicing is as described above. FIG. 7 shows the state during yarn splicing. After the yarn splicing is completed, the unit control section 15 restarts winding the yarn 5 onto the package 7 (S110).

In this embodiment, by rotating the package 7 in the reverse direction, the tension of the thread 5 is reduced, making it easier for the catching device 24 to capture the thread 5. Therefore, there is no need to reversely rotate the package 7 after the capture waiting period has elapsed. Specifically, the unit control section 15 maintains the stoppage of the rotation of the package 7 after the reverse rotation of the package 7 has stopped and until the yarn splicing by the yarn splicing device 82 is completed. ). Note that the package 7 may be rotated in the reverse direction after the capture standby period has elapsed.

On the other hand, Patent Document 1 describes that after the suction pipe and the suction mouth guide the yarn to the splicer, the package is rotated in the opposite direction to weaken the tension of the yarn on the package side. That is, the timing and purpose of reversely rotating the package are different between this embodiment and Patent Document 1. In the first place, Patent Document 1 does not disclose a device corresponding to the capturing device 24 of this embodiment.

Next, a modification of the above embodiment will be described with reference to FIG. Further, the matters described in the above embodiment can also be applied to this modification as long as there is no contradiction.

In the embodiment described above, the tension of the thread 5 is reduced by rotating the package 7 in the opposite direction. In contrast, in this modification, the tension of the yarn 5 is reduced by making the winding speed of the package 7 slower than the yarn feeding speed of the yarn storage device 23. This will be explained in detail below.

Steps S201 to S204 in the flowchart in FIG. 8 are the same as S101 to S104 in the flowchart in FIG. 3. Steps S209 to S211 in the flowchart in FIG. 8 are the same as S107 to S110 in the flowchart in FIG. 3. Therefore, steps S205 to S208, which are unique processes of this modification, will be explained.

The unit control section 15 operates the thread removing member 55 at or near the timing at which the suction flow is generated in the suction port 62 of the catching device 24 (S205). Specifically, the thread removing member 55 is moved from the retracted position to the thread removing position. As a result, the thread 5 comes off from the thread hooking member 53, so that it becomes possible to create slack in the thread 5 based on the speed difference between the winding speed and the thread feeding speed. After the timing at which the thread 5 passes through the thread removing member 55 and is sucked by the catching device 24, the thread removing member 55 moves from the thread removing position to the retracted position.

Next, the unit control section 15 adjusts the winding speed to be slower than the yarn feeding speed (S206). As a result, the yarn 5 between the yarn storage roller 51 and the package 7 becomes slack. In this embodiment, the unit control section 15 sets the winding speed to zero to stop the rotation of the package 7, and also reduces the yarn feeding speed to be lower than the yarn feeding speed during spinning by the spinning device 22. The purpose of reducing the yarn feeding speed is to gradually loosen the yarn 5. However, the speed adjustment in this embodiment is just an example, and is not limited to this. For example, the unit control section 15 does not need to change the yarn feeding speed. Further, the unit control section 15 may maintain the winding speed at a low speed instead of setting it to zero.

The unit control section 15 determines whether a predetermined time has elapsed after setting the winding speed to be slower than the yarn feeding speed (S207). The predetermined time is determined in advance based on, for example, the time required for the catching device 24 to catch the thread 5. When the unit control section 15 determines that the predetermined time has elapsed, the unit control section 15 increases the yarn feeding speed (S208). Thereby, the yarn remaining in the yarn storage device 23 can be unwound in a short time. After the yarn 5 remaining in the yarn storage device 23 is unwound, the rotation of the yarn storage roller 51 may be stopped.

As described above, the spinning machine 1 of the above embodiment and modification includes the spinning device 22, the yarn storage device 23, the winding device 25, the catching device 24, and the unit control section 15. The spinning device 22 supplies the yarn 5. The yarn storage device 23 pulls out the yarn 5 from the spinning device 22. The winding device 25 winds up the yarn 5 supplied by the spinning device 22 to form a package 7. The catching device 24 is located between the yarn storage device 23 and the winding device 25 in the yarn traveling direction, and is at a position where it can suck the yarn 5 on the yarn path from the yarn storage device 23 to the winding device 25. If the yarn 5 is separated, the yarn 5 on the package 7 side is suctioned and captured. The unit control unit 15 controls the yarn 5 between the yarn storage device 23 and the package 7 during a capture standby period after the yarn 5 is separated and before the yarn 5 on the package 7 side is captured by the capture device 24. control to reduce tension.

As a result, since the catching device 24 catches the yarn 5 between the yarn storage device 23 and the package 7, the catching device 24 catches the yarn 5 on the package 7 side, compared to the case where the yarn 5 stuck to the package 7 is caught. easy. Furthermore, since the tension of the yarn 5 between the yarn storage device 23 and the package 7 is reduced, the suction flow of the catching device 24 acts more easily on the yarn 5. As a result, the yarn 5 on the package 7 side can be captured with high probability.

In the spinning machine 1 of the embodiment and modification described above, the yarn storage device 23 includes a yarn storage roller 51 and a thread hooking member 53. The yarn storage roller 51 is disposed downstream of the spinning device 22 in the yarn traveling direction and upstream of the winding device 25 in the yarn traveling direction, and winds the yarn 5 around its outer peripheral surface and temporarily stores it. The thread hooking member 53 wraps the thread 5 around the outer peripheral surface of the thread accumulating roller 51 by rotating integrally with the thread accumulating roller 51 with the thread 5 in contact with the thread 5.

Thereby, since the yarn 5 is stored in the yarn storage roller 51, it is possible to secure time until the end of the yarn 5 on the package 7 side passes through the catching device 24 after the yarn 5 is divided. Therefore, control to reduce the tension of the thread 5 can be easily performed.

In the spinning machine 1 of the above-described embodiment and modification, the unit control section 15 rotates the package 7 in the opposite direction with respect to the winding direction of the yarn 5 during the acquisition standby period, so that the yarn storage device 23 and the package 7 can be connected to each other. The tension of thread 5 is reduced.

Thereby, the tension of the yarn 5 can be reduced by simple processing. Further, by simply changing the amount of reverse rotation of the package 7, the degree to which the tension is reduced and/or the degree to which the thread 5 is loosened can be adjusted.

In the spinning machine 1 of the embodiment described above, the unit control section 15 reversely rotates the package 7 so that the yarn 5 of 20 mm or more is unwound from the package 7 during the acquisition standby period.

Thereby, the thread 5 can be greatly loosened, so that the suction flow of the catching device 24 can be easily applied to the thread 5.

In the spinning machine 1 of the embodiment described above, the unit control section 15 adjusts the amount of reverse rotation of the package 7 depending on the type of yarn 5.

Thereby, even if the yarn 5 is of a type that is difficult to be attracted by the catching device 24, by increasing the amount of reverse rotation, the catching device 24 can catch the yarn 5 on the package 7 side with high probability.

The spinning machine 1 of the embodiment described above includes a yarn monitoring device 47 that monitors the condition of the yarn 5. When the yarn defect detected by the yarn monitoring device 47 is a long defect, the unit control section 15 increases the amount of reverse rotation of the package 7 than when the yarn defect detected by the yarn monitoring device 47 is a short defect. .

Thereby, even if the yarn defect is long, the yarn defect can be removed from the yarn 5 by increasing the amount of reverse rotation.

The spinning machine 1 of the above embodiment further includes a thread removing member 55 that acts on the thread 5 and removes the thread 5 from the thread hooking member 53. During the acquisition standby period, the unit controller 15 controls the winding speed of the package 7 to be slower than the yarn feeding speed of the yarn storage roller 51 while the yarn 5 is removed from the yarn hooking member 53 by the yarn removing member 55. , reducing the tension of the yarn 5 between the yarn storage device 23 and the package 7.

Thereby, the tension of the yarn 5 can be reduced using the yarn storage device 23.

The spinning machine 1 of the above-mentioned modification may be provided with a disabling means for disabling the action of the thread hooking member 53 on the thread 5 instead of the thread removing member 55. The disabling means may be a stopper that stops the rotation of the threading member 53 by coming into contact with the threading member 53. The stopper is an extensible member that extends and contacts the threading member 53 when the rotation of the threading member 53 is stopped, thereby stopping the rotation of the threading member 53. The disabling means is a motor capable of stopping the rotation of the thread hooking member 53 independently of the rotation of the yarn storage roller 51, and stopping the thread hooking member 53 at a position retracted from the thread 5. It's okay. During the acquisition standby period, the unit controller 15 controls the winding speed of the package 7 to be slower than the yarn feeding speed of the yarn storage roller 51 while the yarn 5 is removed from the yarn hooking member 53 by the yarn removing member 55. , reducing the tension of the yarn 5 between the yarn storage device 23 and the package 7.

Thereby, the tension of the yarn 5 can be reduced using the yarn storage device 23.

In the spinning machine 1 of the above modification, the unit control section 15 makes the winding speed of the package 7 slower than the yarn feeding speed of the yarn accumulating roller 51, and then increases the yarn feeding speed of the yarn accumulating roller 51.

Thereby, the remaining yarn on the yarn storage roller 51 can be removed in a short time while reducing the tension of the yarn 5 using the winding device 25.

The spinning machine 1 of the embodiment and modification described above includes a yarn splicing device 82 that splices the yarn 5 on the yarn feeding section side and the yarn 5 on the package 7 side. The unit control unit 15 controls the package 7 after the capturing device 24 has completed capturing the yarn 5 on the package 7 side and stopping the rotation of the package 7, and until the yarn splicing device 82 has completed the yarn splicing. maintain suspension.

Thereby, the time required for yarn splicing can be shortened compared to the case where the package 7 is rotated in reverse immediately before yarn splicing.

In the spinning machine 1 of the above embodiment and the modified embodiment, the capturing device 24 suctions and captures the middle portion of the yarn 5 in a state where the yarn 5 is connected between the yarn storage device 23 and the package 7 .

Thereby, the catching device 24 can catch the yarn 5 before the yarn end becomes free, and can therefore capture the yarn 5 on the package 7 side with high probability.

Although the preferred embodiments of the present invention have been described above, the above configuration can be modified as follows, for example.

In the spinning unit 2, a yarn guide may be provided between the yarn storage roller 51 and the suction port 62 of the catching device 24. The suction port 62 is provided to open between the thread guide and the thread guide 48 . In this case, by performing control to reduce the tension, the thread 5 becomes slack between the thread guide and the thread guide 48.

Although the spinning machine 1 includes a capture device 24 and a suction mouth 84, the suction mouth 84 may be omitted. The spinning machine 1 may not include the yarn splicing cart 80, and each spinning unit 2 may include a device necessary for yarn splicing processing.

The flowchart shown in the above embodiment is an example, and some processes may be omitted, the contents of some processes may be changed, or new processes may be added. For example, the process of generating the suction flow in the capture device 24 may be performed before the tension reduction timing. In this case, the catching device 24 suctions and captures the thread 5 immediately after the tension of the thread 5 between the thread storage device 23 and the winding device 25 decreases and becomes slack.

The central control device 115 or the trolley control section 85 may perform part of the processing described as being performed by the unit control section 15 in the above embodiment.

The spinning machine 1 may further include an auxiliary device that assists the suction of the yarn 5 by the catching device 24. For example, the auxiliary device is placed at a position facing the suction port 62 of the capture device 24. The auxiliary device pushes the yarn 5 toward the suction port 62 of the trapping device 24 by jetting gas, or pushes the yarn toward the suction port 62 of the trapping device 24 by contacting the yarn 5 and pressing the yarn 5. Push in.

In the above embodiment, the yarn 5 is pulled out from the spinning device 22 by the yarn storage device 23, but instead of the yarn storage device 23, a pair of delivery rollers (pulling device) as a pulling device is provided downstream of the spinning device 22, and the delivery roller The yarn 5 may be pulled out from the spinning device 22 by pairs. In this case, the yarn storage device 23 and/or a mechanical compensator may be provided downstream of the delivery roller pair.

In the spinning machine 1, each device is arranged so that the yarn 5 supplied on the upper side is wound on the lower side in the height direction of the machine base. However, each device may be arranged so that the yarn 5 supplied on the lower side is wound on the upper side.

The present invention is not limited to spinning machines, but can also be applied to other yarn winding machines such as automatic winders. When the present invention is applied to an automatic winder, the yarn feeding section is a portion where the yarn feeding bobbin is set and the yarn is pulled out from the yarn feeding bobbin.

1 Spinning machine 15 Unit control section (control section)
22 Spinning device (yarn feeding section)
23 Yarn storage device 24 Capturing device 25 Winding device 51 Yarn storage roller 53 Yarn hooking member 55 Yarn removal member

Claims (11)

a yarn feeding section for supplying yarn;
a pull-out device that pulls out the yarn from the yarn feeding section;
a winding device that winds up the yarn supplied by the yarn feeding section to form a package;
The yarn is disposed at a position between the drawing device and the winding device in the yarn traveling direction and at a position where the yarn on the yarn path from the drawing device to the winding device can be sucked. a capturing device that suctions and captures the thread on the package side when the thread is separated;
A control unit that performs control to reduce the tension of the yarn between the drawing device and the package during a capture waiting period after the yarn is separated and before the yarn on the package side is captured by the capturing device. and,
A yarn winding machine characterized by comprising: The yarn winding machine according to claim 1,
The drawer device includes:
a yarn storage roller that is disposed downstream of the yarn feeding section in the yarn running direction and upstream of the winding device in the yarn running direction, and winds the yarn around the outer peripheral surface and temporarily stores the yarn;
a thread hooking member that rotates integrally with the thread accumulating roller while in contact with the thread to wrap the thread around the outer peripheral surface of the thread accumulating roller;
A yarn winding machine characterized by comprising: The yarn winding machine according to claim 1 or 2,
Yarn winding characterized in that the control unit reduces the tension of the yarn between the drawing device and the package by rotating the package in a reverse direction with respect to the winding direction of the yarn during the catching standby period. Machine. The yarn winding machine according to claim 3,
The yarn winding machine, wherein the control unit reversely rotates the package so that a yarn of 20 mm or more is unwound from the package during the capture standby period. The yarn winding machine according to claim 3 or 4,
The yarn winding machine, wherein the control section adjusts the amount of reverse rotation of the package depending on the type of yarn. The yarn winding machine according to any one of claims 3 to 5,
Equipped with a thread monitoring device that monitors the thread condition.
The control unit may increase the amount of reverse rotation of the package when the yarn defect detected by the yarn monitoring device is a long defect than when the yarn defect detected by the yarn monitoring device is a short defect. A thread winding machine featuring: The yarn winding machine according to claim 2,
further comprising a thread removing member that acts on the thread and removes the thread from the thread hooking member;
In the catching standby period, the control unit controls the winding speed of the package to be slower than the yarn feeding speed of the yarn accumulating roller in a state where the yarn is removed from the yarn hooking member by the yarn removing member. A yarn winding machine characterized in that the tension of the yarn between the drawing device and the package is reduced. The yarn winding machine according to claim 2,
further comprising a disabling means for disabling the action of the thread hooking member on the thread,
The invalidating means includes:
a stopper that stops rotation of the threading member by contacting the threading member;
A motor capable of stopping the rotation of the threading member independently of rotation of the yarn storage roller, and stopping the threading member at a position retracted from the thread. can be,
The control unit is configured to control the winding speed of the package to be lower than the yarn feeding speed of the yarn accumulating roller during the acquisition standby period, with the nullifying means invalidating the action of the yarn hooking member on the yarn. A yarn winding machine characterized in that the tension of the yarn between the drawing device and the package is reduced by doing so. The yarn winding machine according to claim 7 or 8,
The yarn winding machine is characterized in that the control section increases the yarn feeding speed of the yarn accumulating roller after making the winding speed of the package slower than the yarn feeding speed of the yarn accumulating roller. A thread winding machine according to any one of claims 1 to 9,
a yarn splicing device that splices the yarn on the yarn feeding section side and the yarn on the package side;
The control unit is configured to stop the package after the capturing device has completed capturing the yarn on the package side and stopping the rotation of the package, and until the yarn splicing device has completed the yarn splicing. A yarn winding machine characterized by maintaining. A yarn winding machine according to any one of claims 1 to 10,
The yarn winding machine is characterized in that the catching device suctions and catches a middle part of the yarn in a state where the yarn is connected between the pulling device and the package.

Images