阅读说明：本技术 纤维处理方法、纤维处理系统、以及存储介质 (Fiber processing method, fiber processing system, and storage medium ) 是由 冈正毅 里见真一 于 2019-04-24 设计创作，主要内容包括：一种纤维处理方法、纤维处理系统、以及存储介质,纤维处理方法具备：梳理工序,使用1台或多台梳理机从原料生成纤维束；并条工序,使用1台或多台并条机对由梳理工序生成的纤维束进行并条；气流纺纱工序,使用1台或多台气流纺纱机对由并条工序并条的纤维束进行精纺而生成纱线；第一获取工序,获取与由梳理工序生成的纤维束的品质相关的第一品质数据；第二获取工序,获取与由并条工序并条后的纤维束的品质相关的第二品质数据；第三获取工序,获取与由气流纺纱工序生成的纱线的品质相关的第三品质数据；及异常判别工序,当由气流纺纱机生成的纱线不良的情况下,基于各品质数据,判别原料、梳理机、并条机及气流纺纱机中产生异常的至少任一个。(A fiber processing method, a fiber processing system, and a storage medium, the fiber processing method comprising: a carding step of generating a fiber bundle from a raw material using 1 or more carding machines; a drawing step of drawing the fiber bundle generated in the carding step by using 1 or more drawing frames; an open-end spinning step of producing a yarn by spinning the fiber bundle drawn in the drawing step using 1 or more open-end spinning machines; a first acquisition step of acquiring first quality data relating to the quality of the fiber bundle generated in the carding step; a second acquisition step of acquiring second quality data relating to the quality of the fiber bundle drawn by the drawing step; a third acquisition step of acquiring third quality data relating to the quality of the yarn produced in the open-end spinning step; and an abnormality determination step of determining at least one of the raw material, the carding machine, the drawing frame, and the rotor spinning machine, in which abnormality occurs, based on the respective quality data, when the yarn produced by the rotor spinning machine is defective.)

1. A fiber treatment method includes:

a carding step of generating a fiber bundle from a raw material using 1 or more carding machines;

a drawing step of drawing the fiber bundle generated in the carding step by using 1 or more drawing frames;

an open-end spinning step of producing a yarn by finely spinning the fiber bundle drawn in the drawing step using 1 or more open-end spinning machines;

a first acquisition step of acquiring first quality data relating to the quality of the fiber bundle generated in the carding step;

a second acquisition step of acquiring second quality data relating to the quality of the fiber bundle drawn in the drawing step;

a third acquisition step of acquiring third quality data on the quality of the yarn produced in the air-jet spinning step; and

and an abnormality determination step of determining at least one of the raw material, the carding machine, the drawing frame, and the rotor spinning machine, which has an abnormality, based on the first quality data, the second quality data, and the third quality data, when the yarn produced by the rotor spinning machine is defective.

2. The fiber treatment method according to claim 1,

in the abnormality determination step, when the yarn produced by the rotor spinning machine is defective, at least one of the raw material of the yarn, 1 or more rotor spinning machines that produce the yarn, 1 or more drawing frames that draw the fiber bundle supplied to the rotor spinning machine, and 1 or more carding machines that produce the fiber bundle supplied to the drawing frames is determined to have an abnormality based on the first quality data, the second quality data, and the third quality data.

3. The fiber treatment method according to claim 2,

in the abnormality determination step, when the yarn produced by the rotor spinning machine is defective, at least one of the raw material of the yarn, 1 rotor spinning machine that produces the yarn, 1 drawing machine that draws the fiber bundle supplied to the rotor spinning machine, and 1 carding machine that produces the fiber bundle supplied to the drawing machine is determined to be abnormal based on the first quality data, the second quality data, and the third quality data.

4. The fiber treatment method according to any one of claims 1 to 3,

in the abnormality determination step, when the yarn produced by the rotor spinning machine is defective, the cause of the abnormality is estimated based on the first quality data, the second quality data, and the third quality data.

5. The fiber treatment method according to any one of claims 1 to 4,

the first quality data is data relating to at least one of the number of nodules contained in the fiber bundle and the thickness of the fiber bundle,

the second quality data is data relating to the thickness of the fiber bundle,

the third quality data is data relating to at least one of a defect and a thickness of the yarn.

6. The fiber treatment method according to any one of claims 1 to 5,

in the abnormality determination step, when the yarn produced by the rotor spinning machine is defective, at least one of the raw material, the carding machine, the drawing frame, and the rotor spinning machine in which an abnormality occurs is determined based on setting data of the carding machine and setting data of the drawing frame.

7. The fiber treatment method according to claim 6,

the setting data of the carding machine is data related to setting of at least one of the generation speed of the fasciculus and the removing amount of the neps removed from the fasciculus,

the setting data of the drawing frame is data related to setting of at least one of a self-leveler of the drawing frame and a drawing speed of the fiber bundle.

8. The fiber treatment method according to any one of claims 1 to 7,

and a reporting step of reporting that prompts adjustment or maintenance of at least one of the carding machine, the drawing frame, and the rotor spinning machine to be performed, based on the determination result determined in the abnormality determining step.

9. The fiber treatment method according to claim 8,

in the reporting step, a display unit displays a prompt to adjust the setting or maintain at least one of the carding machine, the drawing frame, and the rotor spinning machine.

10. The fiber treatment method according to any one of claims 1 to 9,

the disclosed device is provided with:

a first step of setting a first threshold value that is a management limit value of fluctuation of the third quality data and a second threshold value that is smaller than the first threshold value;

a second step of changing setting data of at least one of the carding machine and the drawing frame after the first step; and

and a third step of returning to the second step after the second step when the third quality data is greater than the first threshold, returning the setting data of at least one of the carding machine and the drawing frame to the setting data before the second step which is the latest time before the first step when the third quality data is equal to or less than the first threshold and greater than the second threshold, and returning the setting data of at least one of the carding machine and the drawing frame to the first setting data before the second step when the third quality data is equal to or less than the second threshold.

11. The fiber treatment method according to any one of claims 1 to 10,

the abnormality determination step is performed by the control device of the rotor spinning machine.

12. The fiber treatment method according to any one of claims 1 to 11,

in the abnormality determination step, when the yarn produced by the rotor spinning machine is defective, at least one of the raw material, the carding machine, the drawing frame, and the rotor spinning machine in which an abnormality occurs is determined using a map for abnormality determination stored in a storage unit.

13. A fiber processing system is provided with:

1 or more carding machines to generate fiber bundles;

1 or a plurality of drawing frames for drawing the fiber bundles generated by the carding machine;

1 or more air-jet spinning machines for spinning the fiber bundle drawn by the drawing frame to produce a yarn;

a first quality data acquiring unit that acquires first quality data relating to quality of the generated fiber bundle;

a second quality data acquiring unit for acquiring second quality data relating to the quality of the drawn fiber bundle;

a third quality data acquiring unit configured to acquire third quality data on the quality of the yarn; and

and an abnormality determination unit configured to determine, when the yarn produced by the rotor spinning machine is defective, at least one of the raw material, the carding machine, the drawing frame, and the rotor spinning machine in which an abnormality occurs, based on the first quality data, the second quality data, and the third quality data.

14. A storage medium which is a computer-readable storage medium storing a fiber processing program, wherein,

the fiber treatment system is provided with:

1 or more carding machines to generate fiber bundles;

1 or a plurality of drawing frames for drawing the fiber bundles generated by the carding machine;

1 or more air-jet spinning machines for spinning the fiber bundle drawn by the drawing frame to produce a yarn;

a first quality data acquiring unit that acquires first quality data relating to quality of the generated fiber bundle;

a second quality data acquiring unit for acquiring second quality data relating to the quality of the drawn fiber bundle; and

a third quality data acquiring unit for acquiring third quality data related to the quality of the yarn to be produced,

the above-mentioned fiber treatment program is constituted so that,

in the fiber processing system, the computer is caused to execute an abnormality determination process including: when the yarn produced by the rotor spinning machine is defective, at least one of the raw material, the carding machine, the drawing frame, and the rotor spinning machine in which an abnormality occurs is determined based on the first quality data, the second quality data, and the third quality data.

Technical Field

The invention relates to a fiber processing method, a fiber processing system, and a storage medium.

Background

As a conventional technique relating to a fiber treatment method, a method described in japanese patent application laid-open No. 4-7269 is known. In the method described in japanese patent application laid-open No. 4-7269, in a fiber plant that produces a yarn through a carding step, a drawing step, and an air-jet spinning step (an open-end spinning step or an air-jet spinning step), an identification number is assigned to each step, each machine body, and each spindle. When a product is doffed and supplied to the next process, the machine body number on which the doffing is performed, the lot number of the product, and the machine body number of the supply target are stored. This makes it possible to track the history of the location and time of passage of the intermediate product or the final product.

In the above-described prior art, there are possibilities as follows: even if the yarn finally obtained is defective, the correlation between the fact that the yarn is defective and the raw material and each process cannot be judged, and the abnormality of the raw material and the machine (carding machine, drawing machine, and rotor spinning machine) of each process cannot be known. In this case, there is a concern that action delay for eliminating an abnormality may occur.

Disclosure of Invention

Accordingly, an object of the present invention is to provide a fiber processing method, a fiber processing system, and a storage medium capable of recognizing abnormality of a raw material, a carding machine, a drawing frame, and a rotor spinning machine.

A fiber treatment method according to an embodiment of the present invention includes: a carding step of generating a fiber bundle from a raw material using 1 or more carding machines; a drawing step of drawing the fiber bundle generated in the carding step by using 1 or more drawing frames; an open-end spinning step of producing a yarn by finely spinning the fiber bundle drawn in the drawing step using 1 or more open-end spinning machines; a first acquisition step of acquiring first quality data relating to the quality of a fiber bundle generated by the carding step; a second acquisition step of acquiring second quality data relating to the quality of the fiber bundle drawn by the drawing step; a third acquisition step of acquiring third quality data relating to the quality of the yarn produced by the open-end spinning step; and an abnormality determination step of determining at least one of the raw material, the carding machine, the drawing frame, and the rotor spinning machine, which has caused an abnormality, based on the first quality data, the second quality data, and the third quality data when the yarn produced by the rotor spinning machine is defective.

The abnormality of the raw material and the machine in each step was found to have a correlation with the quality data acquired in association with each step. Therefore, when the yarn produced by the rotor spinning machine is defective, the material having the abnormality and the machine of each step are discriminated based on the first quality data, the second quality data, and the third quality data. Thus, the abnormality of the material, the carding machine, the drawing frame, and the rotor spinning machine can be known.

In the fiber processing method according to one embodiment of the present invention, in the abnormality determination step, when the yarn produced by the rotor spinning machine is defective, at least one of abnormality occurrence in the raw material of the yarn, 1 or more rotor spinning machines that produce the yarn, 1 or more drawing frames that draw the fiber bundle supplied to the rotor spinning machines, and 1 or more carding machines that produce the fiber bundle supplied to the drawing frames may be determined based on the first quality data, the second quality data, and the third quality data. Thus, the abnormality of the raw material, the carding machine, the drawing frame, and the rotor spinning machine in the processing path related to the generation of the defective yarn can be known.

In the fiber processing method according to one embodiment of the present invention, in the abnormality determination step, when the yarn produced by the rotor spinning machine is defective, at least one of the raw material of the yarn, 1 rotor spinning machine that produces the yarn, 1 drawing machine that draws the fiber bundle supplied to the rotor spinning machine, and 1 carding machine that produces the fiber bundle supplied to the drawing machine may be determined based on the first quality data, the second quality data, and the third quality data. In this case, since the number of machines related to the generation of the defective yarn is small, it is possible to accurately know the abnormality of the raw material, the carding machine, the drawing frame, and the rotor spinning machine in the processing path related to the generation of the defective yarn.

In the fiber processing method according to one embodiment of the present invention, in the abnormality determination step, when the yarn produced by the rotor spinning machine is defective, the cause of the abnormality may be estimated based on the first quality data, the second quality data, and the third quality data. In this case, the specific cause of the abnormality in the material, the carding machine, the drawing frame, and the rotor spinning machine can also be known.

In the fiber processing method according to one embodiment of the present invention, the first quality data may be data relating to at least one of the number of nodules included in the fiber bundle and the thickness of the fiber bundle, the second quality data may be data relating to the thickness of the fiber bundle, and the third quality data may be data relating to at least one of the defect and the thickness of the yarn. In this case, the abnormality of the material, the carding machine, the drawing frame, and the rotor spinning machine can be known with high accuracy.

In the fiber processing method according to one embodiment of the present invention, in the abnormality determination step, when the yarn produced by the air-jet spinning machine is defective, at least one of the raw material, the carding machine, the drawing frame, and the air-jet spinning machine in which the abnormality occurs may be determined based on the setting data of the carding machine and the setting data of the drawing frame. Regarding the abnormality of the machine of the raw material and each process, it was found that there is a correlation with the relationship of the quality data acquired in association with each process, and also with the relationship of each setting data of the carding machine and the drawing machine. Therefore, by further using the setting data of the carding machine and the setting data of the drawing frame, it is possible to know the abnormality of the material, the carding machine, the drawing frame, and the rotor spinning machine with high accuracy.

In the fiber processing method according to the embodiment of the present invention, the setting data of the carding machine may be data relating to setting of at least one of a generation speed of the fiber bundle and a removal amount of the neps removed from the fiber bundle, and the setting data of the drawing frame may be data relating to setting of at least one of a self-leveler of the drawing frame and a drawing speed of the fiber bundle. In this case, the abnormality of the material, the carding machine, the drawing frame, and the rotor spinning machine can be known with high accuracy.

The fiber processing method according to one embodiment of the present invention may further include a reporting step of reporting to prompt setting adjustment or maintenance of at least one of the carding machine, the drawing frame, and the rotor spinning machine based on the determination result determined in the abnormality determining step. This enables, for example, an operator to quickly act on the raw material, carding machine, drawing frame, and rotor spinning machine.

In the fiber processing method according to the embodiment of the present invention, in the notification step, a display portion may be provided to prompt setting adjustment or maintenance of at least one of the carding machine, the drawing machine, and the rotor spinning machine. This enables the operator to confirm the specific contents of the report prompting the setting adjustment or maintenance.

A fiber processing method according to an embodiment of the present invention may include: a first step of setting a first threshold value that is a management limit value of fluctuation of the third quality data and a second threshold value that is smaller than the first threshold value; a second step of changing the setting data of at least one of the carding machine and the drawing frame after the first step; and a third step of returning to the second step after the second step when the third quality data is greater than the first threshold, returning the setting data of at least one of the carding machine and the drawing frame to the setting data before the second step which is the latest time before the first step when the third quality data is equal to or less than the first threshold and greater than the second threshold, and returning the setting data of at least one of the carding machine and the drawing frame to the setting data before the first step when the third quality data is equal to or less than the second threshold. Thus, the desired setting data for at least one of the carding machine and the drawing frame can be examined using the variation in the quality of the yarn produced by the rotor spinning machine as an index.

In the fiber processing method according to the embodiment of the present invention, the abnormality determination step may be performed by a control device of the rotor spinning machine. By performing abnormality determination by a control device of the air-jet spinning machine arranged downstream of the step, setting adjustment of the tracing step and confirmation of maintenance can be easily performed.

A fiber processing system according to an embodiment of the present invention includes: 1 or more carding machines to generate fiber bundles; 1 or more drawing frames for drawing the fiber bundles generated by the carding machine; 1 or more air-jet spinning machines for spinning the fiber bundle drawn by the drawing frame to produce a yarn; a first quality data acquisition unit that acquires first quality data relating to the quality of the generated fiber bundle; a second quality data acquiring unit for acquiring second quality data relating to the quality of the drawn fiber bundle; a third quality data acquisition unit for acquiring third quality data relating to the quality of the yarn to be produced; and an abnormality determination unit configured to determine at least one of the raw material, the carding machine, the drawing frame, and the rotor spinning machine, which has caused an abnormality, based on the first quality data, the second quality data, and the third quality data when the yarn produced by the rotor spinning machine is defective.

In this fiber processing system, similarly to the above-described fiber processing method, when the yarn produced by the rotor spinning machine is defective, the raw material having the abnormality and the machine of each step are discriminated based on the first quality data, the second quality data, and the third quality data. Thus, the abnormality of the material, the carding machine, the drawing frame, and the rotor spinning machine can be known.

A storage medium according to an embodiment of the present invention is a computer-readable storage medium storing a fiber processing program, and a fiber processing system includes: 1 or more carding machines to generate fiber bundles; 1 or more drawing frames for drawing the fiber bundles generated by the carding machine; 1 or more air-jet spinning machines for spinning the fiber bundle drawn by the drawing frame to produce a yarn; a first quality data acquisition unit that acquires first quality data relating to the quality of the generated fiber bundle; a second quality data acquiring unit for acquiring second quality data relating to the quality of the drawn fiber bundle; and a third quality data acquiring unit that acquires third quality data relating to the quality of the yarn to be produced, wherein the fiber processing program is configured to cause the computer to execute abnormality determination processing as follows in the fiber processing system: when the yarn produced by the rotor spinning machine is defective, at least one of the raw material, the carding machine, the drawing frame and the rotor spinning machine which generates the abnormality is discriminated based on the first quality data, the second quality data and the third quality data.

In the storage medium, similarly to the above-described fiber processing method, when the yarn produced by the rotor spinning machine is defective, the stored fiber processing program is used to determine the material having abnormality and the machine of each step based on the first quality data, the second quality data, and the third quality data. Thus, the abnormality of the material, the carding machine, the drawing frame, and the rotor spinning machine can be known.

According to the present invention, it is possible to provide a fiber processing method, a fiber processing system, and a storage medium capable of knowing abnormality of a raw material, a carding machine, a drawing frame, and a rotor spinning machine.

Drawings

Fig. 1 is a block diagram showing a configuration of a fiber processing system according to an embodiment.

Fig. 2 is a block diagram showing a main part of fig. 1.

Fig. 3 is a diagram showing a fiber processing routine according to an embodiment.

Fig. 4 is a table illustrating a mapping table for abnormality determination.

Fig. 5 is a graph showing the correlation of the number of nodules with time by way of example.

Detailed Description

Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description thereof is omitted.

As shown in fig. 1, a fiber processing system 1 according to one embodiment includes a plurality of carders 10, a plurality of drawing frames 30, a plurality of rotor spinning machines 50, and a controller 70.

The carding machine 10 combs (carding) the lap produced by the opening and picking machine in a step preceding the carding step, to produce a fiber bundle. For example, the carding machine 10 separates fibers by cutting a sheet-like lap with a guide bar, and removes trash, short fibers, and the like contained in the lap. Thereafter, the carding machine 10 combines and aggregates the fibers remaining after the removal of the trash and short fibers in parallel to produce a ribbon-shaped fiber bundle (carded sliver). The carding machine 10 has a drafting device. The draft device is provided downstream of the carding machine 10, and drafts (stretches) the generated fiber bundle. The drafting device opens the fiber bundle to improve the parallelism of the fiber bundle. The carding machine 10 accommodates the fiber bundle drafted by the draft device in a can (for example, a cylindrical container). The fiber bundle drafted by the draft device of the carding machine 10 is transferred to the next step while being contained in a can.

The drawing frame 30 draws the fiber bundle generated by the carding machine 10. For example, the drawing frame 30 draws 6 or 8 fiber bundles together 6 or 8 times, straightens the fibers, and removes unevenness in the thickness of the fiber bundles. The drawing frame 30 accommodates the drawn fiber bundle in a can. The fiber bundle drawn by the drawing frame 30 is transferred to the next process in a state of being stored in a can.

The air spinning machine 50 performs fine spinning on the fiber bundle drawn by the drawing frame 30 to generate a yarn. The air-jet spinning machine 50 twists the fiber bundle drawn by the drawing frame 30 to generate a yarn, and winds the yarn to form a package. The rotor spinning machine 50 is, for example, a rotor jet spinning machine or an open-end spinning machine. The air jet spinning machine produces a yarn by twisting a fiber bundle with a whirling air flow. The air-jet spinning machine 50 may draft the fiber bundle by a draft section having a plurality of draft roller pairs. The open-end spinning machine separates fibers of a fiber bundle by a carding roller or an air flow, and twists the fibers while aggregating the fibers again to produce a yarn.

The controller 70 is a computer, and has: a processor (e.g., a CPU) that executes an operating system, an application program, and the like; a storage unit 72 (see fig. 3) including a ROM [ Read Only Memory ], a RAM [ Random Access Memory ], and a hard disk; and a communication control unit configured by a network card or a wireless communication module. The storage unit 72 stores data or a database necessary for processing.

The controller 70 is a host controller that manages or controls the entire fiber processing system 1. For example, the controller 70 is constituted by a central management computer of a fiber plant in which the fiber processing system 1 is disposed. The controller 70 communicates with the carding machine 10, the drawing frame 30, and the rotor spinning machine 50, and manages or controls the carding machine 10, the drawing frame 30, and the rotor spinning machine 50. The controller 70 may be constituted by one device or a plurality of devices. In the case where the controller 70 is configured by a plurality of devices, the plurality of devices logically configure one controller 70 by being connected via a communication network such as the internet or an intranet.

In such a fiber treatment system 1, a fiber treatment method including the steps of: a carding step (carding step) of generating a fiber bundle from a raw material by using a carding machine 10; a drawing step of drawing the fiber bundle generated in the carding step by using a drawing frame 30; and an air spinning step of producing a yarn by spinning the fiber bundle drawn in the drawing step using an air spinning machine 50.

In the fiber processing system 1, the fiber bundle generated by the carding machine 10 and supplied toward the air spinning machine 50 passes only 1 time (1 pass) at the drawing frame 30. In the fiber processing system 1, the fiber bundle generated by 2 carding machines 10 is supplied to 1 drawing frame 30, and the fiber bundle drawn by 1 drawing frame 30 is supplied to 2 air-jet spinning machines 50.

The fiber treatment system 1 may include: a winding device for performing a winding process; and a combing machine for performing the combing process. In this case, the fiber processing method includes a lap step and a combing step. In the lap winding step, the 18 to 24-band fiber bundles generated by the carding machine 10 are formed into 1 sheet and wound up to generate a lap. In the combing step, the sliver lap produced by the sliver lap apparatus is cut by a guide bar, trash and short fibers are removed, and the fibers remaining after removal are combined in parallel to produce a uniform fiber bundle. The fiber bundle generated by the combing process is supplied to the drawing frame 30.

Instead of the air-jet spinning machine 50, the fiber processing system 1 may include a roving frame for performing a roving process, a ring spinning frame for performing a spinning process, and an automatic winder for performing a winding process. In this case, the fiber processing method includes a roving step, a spinning step, and a winding step instead of the air-jet spinning step. In the roving process, a roving is produced from the fiber bundle drawn by the drawing process using a roving machine. In the spinning process, a ring spinning frame is used to produce a yarn from the roving produced in the roving process. In the winding step, the yarn produced in the spinning step is wound by an automatic winder to form a package.

In the fiber processing system 1, the carding machine 10 is provided with the draft device, but the carding machine 10 may not be provided with the draft device. The fiber treatment system 1 is configured to pass the fiber bundle 1 time by 1 time in the drawing frame 30, but may be configured to pass the fiber bundle 2 times by 2 times in the drawing frame 30, or may be configured to pass the fiber bundle 3 times or more by 3 times or more in the drawing frame 30.

Next, the main part of the fiber processing system 1 will be described with reference to fig. 2.

The fiber processing system 1 includes a first quality data acquiring unit 11 that acquires first quality data relating to the quality of the generated fiber bundle. The first quality data includes data relating to the number of nodules contained in the fiber bundle and data relating to the thickness of the fiber bundle. The first quality data acquisition part 11 is, for example, a sensor provided on the downstream side of the card 10. As the first quality data acquisition unit 11, various known sensors can be used. The first quality data acquiring unit 11 may be configured to acquire any one of data relating to the knot of the fiber bundle and data relating to the thickness of the fiber bundle.

The fiber processing system 1 includes a second quality data acquiring unit 31 that acquires second quality data relating to the quality of the drawn fiber bundle. The second quality data includes data relating to the thickness of the fiber bundle. For example, second quality data acquiring unit 31 is a sensor provided on the downstream side of drawing frame 30. As the second quality data acquisition unit 31, various known sensors can be used.

The fiber processing system 1 includes a third quality data acquiring unit 51 that acquires third quality data relating to the quality of the yarn being produced. The third quality data includes data relating to a defect (nubs and/or neps) of the yarn and data relating to the thickness of the yarn. The third quality data acquisition section 51 is, for example, a sensor provided between the rotor spinning device and the yarn drawing device (the yarn accumulating roller or the delivery roller pair) in the rotor spinning machine 50. Various known sensors can be used as the third quality data acquisition unit 51.

The controller 70 includes an abnormality determination unit 71 as a functional configuration. The abnormality determination unit 71 performs an abnormality determination step. In the abnormality determination step, first, it is determined whether or not the yarn produced by the rotor spinning machine 50 is defective. Whether or not the yarn produced by the rotor spinning machine 50 is defective can be determined based on the third quality data acquired by the third quality data acquiring unit 51 of the rotor spinning machine 50. For example, in the abnormality determination step, when at least one of the number of small defects in the yarn produced by the rotor spinning machine 50 increases and the thickness of the yarn produced by the rotor spinning machine 50 varies, the yarn defect is determined.

In the abnormality determination step, when the yarn produced by the rotor spinning machine 50 is defective, at least one of the raw material, the carding machine 10, the drawing frame 30, and the rotor spinning machine 50 in which an abnormality occurs is determined based on the first quality data, the second quality data, and the third quality data. In the abnormality determination step, when the yarn produced by the rotor spinning machine 50 is defective, at least one of the raw material, the carding machine 10, the drawing frame 30, and the rotor spinning machine 50 in which an abnormality occurs is determined based on the setting data of the carding machine 10 and the setting data of the drawing frame 30.

The raw material is a raw material of the yarn produced by the fiber processing system 1. For example, the raw material is raw cotton (not limited to cotton) that is pressed and baled and conveyed. The setting data related to the setting of the carding machine 10 includes data related to the setting of the speed of generation (production speed) of the fiber bundle and data related to the setting of the amount of removal of the neps (long knots). Setting data relating to the settings of the carding machine 10 can be obtained from the carding machine 10. The setting data related to the setting of draw frame 30 includes data related to the setting of the self-leveler of draw frame 30 and data related to the drawing speed (production speed) of the fiber bundle. Setting data relating to the setting of draw frame 30 can be obtained from draw frame 30.

Self-levelers are systems that adjust the draft speed in draw frame 30. Specifically, one of the pair of draft rollers at the most upstream side of the drawing frame 30 is provided so as to be movable relative to the other in accordance with the thickness of the fiber bundle. The thickness of the fiber bundle is detected based on the displacement amount. When the coarse fiber bundle is inserted, the speed of the draft roller at the most upstream side is increased. When the bundle of fine fibers is inserted, the speed of the draft roller at the most upstream side is reduced.

In the abnormality determination step, when the yarn produced by the rotor spinning machine 50 is defective, the cause of the abnormality is estimated based on the first quality data, the second quality data, and the third quality data. In the abnormality determination step, when the yarn produced by the rotor spinning machine 50 is defective, the cause of the abnormality is estimated based on the setting data of the carding machine 10 and the setting data of the drawing frame 30.

In the abnormality determination step of the present embodiment, as will be described later, when the yarn produced by the rotor spinning machine 50 is defective, the abnormal portion and the estimated cause of the abnormality are specified using the map M for abnormality determination (see fig. 4). The mapping table M for abnormality determination is stored in the storage unit 72 of the controller 70.

The controller 70 performs a reporting process. In the reporting step, a report is made to prompt execution of setting adjustment or maintenance of at least any one of the carding machine 10, the drawing frame 30, and the rotor spinning machine 50, based on the determination result determined by the abnormality determination. The report is a notification prompting execution of setting adjustment or maintenance for eliminating the cause of the abnormality estimated in the abnormality determination step. The report may be, for example, the lighting or blinking of a report lamp of at least any one of the carding machine 10, the drawing frame 30, and the rotor spinning machine 50 having the cause of the abnormality. In the reporting step, a display section 90 displays a prompt to perform setting adjustment or maintenance of at least one of the carding machine 10, the drawing frame 30, and the rotor spinning machine 50. The display unit 90 is a monitor of a portable terminal such as a tablet computer. The display section 90 is capable of communicating with the controller 70.

The controller 70 sets a first threshold value, which is a management limit value for the fluctuation of the third quality data, and a second threshold value that is smaller (strict) than the first threshold value. When the operator changes the setting data of the card 10, the controller 70 enables the input of the setting data of the card 10 to be changed again when the third quality data is greater than the first threshold value, returns the setting data of the card 10 to the setting data before the latest change when the third quality data is equal to or less than the first threshold value and greater than the second threshold value, and returns the setting data of the card 10 to the setting data before the first change when the third quality data is equal to or less than the second threshold value (details will be described later).

In the fiber processing system 1, 2 carders 10, 1 drawing frame, and 2 air-jet spinning machines 50 construct 1 path group U having the same processing path of the fiber. When a yarn produced by a certain rotor spinning machine 50 is defective, an abnormality determination process is performed on the path group U to which the rotor spinning machine 50 belongs. In this case, the abnormality determination of the other 1 rotor spinning machine 50 can be omitted.

Specifically, when a yarn produced by a certain rotor spinning machine 50 is defective, at least one of the raw material of the yarn in the path group U to which the rotor spinning machine 50 belongs, the abnormality occurring in the rotor spinning machine 50, the drawing frame 30, and the carding machine 10 is discriminated on the basis of the first to third quality data in the path group U to which the rotor spinning machine 50 belongs and the setting data of the carding machine 10 and the drawing frame 30. That is, when a yarn defect occurs, at least one of the yarn material, the rotor spinning machine 50 that generates the yarn, the drawing frame 30 that draws the fiber bundle supplied to the rotor spinning machine 50, and the carding machine 10 that generates the fiber bundle supplied to the drawing frame 30 is determined to have an abnormality. Information on a path group U (correspondence relationship among the carding machine 10, the drawing frame 30, and the rotor spinning machine 50) having the same fiber processing path is predetermined and stored in the storage unit 72 of the controller 70 (see fig. 3). The controller 70 may perform the above determination based on setting data of the air-jet spinning machine 50.

As shown in fig. 3, a fiber processing program P is stored in the storage unit 72 of the controller 70. The storage unit 72 is a non-transitory computer-readable storage medium that stores the fiber processing program P. The controller 70 reads the fiber processing program P into the processor and executes the program to realize the fiber processing method. The fiber handler P includes an abnormality determination module P1. The abnormality determination module P1 causes the controller 70 to execute the abnormality determination process in the abnormality determination step described above. The fiber processing program P may also be provided on the basis of being fixedly recorded on a tangible recording medium such as a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the fiber processing program P may be provided as a data signal via a communication network.

Next, an example of a fiber treatment method performed by the fiber treatment system 1 will be described.

In the fiber processing method, as described above, a fiber bundle is generated from the raw material using the carding machine 10 (carding process). The produced fiber bundle is drawn by a drawing frame 30 (drawing process). The drawn fiber bundle is spun with an air-jet spinning machine 50 to produce a yarn (air-jet spinning step). The first quality data obtaining unit 11 obtains the first quality data (first obtaining step). The second quality data acquiring unit 31 acquires the second quality data (second acquiring step). The third quality data obtaining unit 51 obtains third quality data (third obtaining step).

In the fiber processing method, when the yarn generated by the rotor spinning machine 50 is defective, an abnormal portion in a processing path through which the defective yarn passes is determined based on the setting data of the carding machine 10, the setting data of the drawing frame 30, the first quality data, the second quality data, and the third quality data with reference to a map M shown in fig. 4 (an abnormality determination step). In the abnormality determination step, the cause of the abnormality may be estimated.

The setting data of the carding machine 10 are the setting data of the carding machine 10 in the processing path in which the yarn passes badly. The setting data of drawing frame 30 is the setting data of drawing frame 30 in the processing path through which the yarn passes badly. The first quality data is the quality data of the fiber bundle generated by the carding machine 10 in the processing path through which the yarn passes badly. The second quality data is the quality data of the fiber bundle drawn by the drawing frame 30 in the processing path through which the yarn passes, which is not good. The third quality data is poor quality data for the yarn.

The map M includes, as setting data of the carding machine 10, a tow generation speed and a removal amount of nodules removed from the tow. The first quality data includes the number of knots included in the fiber bundle detected by the sensor of the carding machine 10 and the variation in the thickness of the fiber bundle. The setting data of the drawing frame 30 includes the drawing speed of the fiber bundle and the presence or absence of setting change of the self-leveler. In addition to or instead of the presence or absence of the setting change of the self-leveler, the setting data of the drawing frame 30 may include the gauge of the draft roller (the distance between the plurality of draft rollers in the draft direction) and/or the draft ratio (the ratio of the peripheral speeds of the plurality of draft rollers in the draft direction). The second quality data includes variations in the thickness of the fiber bundle detected by the sensor of the drawing frame 30. The third quality data includes the number of small defects and the thickness variation of the yarn detected by the sensor of the air-jet spinning machine 50.

The "increase" and "change" of the mapping table M mean a change of a predetermined value or more. The "-" of the mapping table M means no change (no change with respect to a predetermined value). The setting of the knot removal amount in the setting of the carding machine 10 to "change to the reduction setting" means at least one of widening the distance between the main drum and the top deck of the carding machine 10, widening the distance between the main drum and the fixed deck, and adjusting the angle of the dust removing blade (narrowing the size of the suction opening).

The carding wires (teeth) of the carding machine 10 are provided with a plurality of tapered portions having sharp ends on the outer peripheral surface of the main drum. The doffing section of the carding machine 10 is a device that guides a fiber bundle from a main drum to a drafting device or a can. The improper condition of the draft device of the drawing frame 30 means that the draft ratio and/or the gauge of the draft roller is improper. The abnormality of the entire draft section of the rotor spinning machine 50 means that there is an abnormality (a gauge of the draft roller, accumulation of fly, or the like) in a certain portion of the entire draft section except for the front top roller.

As shown in the figure, in the abnormality determination step, when the number of nodules included in the fiber bundle detected by the sensor of the card 10 is increased, the number and thickness of the small defects of the yarn detected by the sensor of the air-jet spinning machine 50 are varied, and other data are not varied, it is determined that the abnormal portion is the raw material, and it is estimated that the cause of the abnormality is the reduction in the quality of the raw material. Specifically, for example, the abnormality of the material of the fiber bundle before being processed by the carding machine 10, or the abnormality of the management of the temperature and/or humidity of the fiber bundle even if there is no abnormality in the material of the fiber bundle. Alternatively, when the number of neps included in the fiber bundle detected by the sensor of the carding machine 10 increases, the number and thickness of the small flaws of the yarn detected by the sensor of the rotor spinning machine 50 vary, and the other data do not vary, it is determined that the abnormal portion is the carding machine 10, and it is estimated that the cause of the abnormality is the wear of the card wire. In this case, in the reporting step described later, an abnormality lamp provided in the vicinity of the main drum where the wear of the card wire occurs may be turned on or blinked, or a message urging the maintenance (the grinding or the replacement by the operator) of the card wire may be displayed on the display unit 90. Alternatively, when the card 10 includes a card wire polishing device, the card wire may be polished by the polishing device.

In the abnormality determination step, when the thickness of the fiber bundle detected by the sensor of the carding machine 10 varies, the thickness of the fiber bundle detected by the sensor of the drawing frame 30 varies, the thickness of the yarn detected by the sensor of the rotor spinning machine 50 increases, and other data do not vary, it is determined that the abnormal portion is the carding machine 10, and it is estimated that the cause of the abnormality is the abnormality of the doffing portion.

In the abnormality determination step, when the thickness of the fiber bundle detected by the sensor of the drawing frame 30 varies, the thickness of the yarn detected by the sensor of the air-jet spinning machine 50 varies, and the other data does not vary, it is determined that the abnormal portion is the drawing frame 30, and it is estimated that the cause of the abnormality is the abnormality of the draft section. In this case, in the reporting step described later, an abnormal lamp provided in the draft section of draw frame 30 may be turned on or blinked, or a message urging maintenance of the draft section (cleaning by an operator or the like) or adjustment of the draft ratio and/or gauge may be displayed on display section 90.

In the abnormality determination step, when the setting of the production speed of the carding machine 10 is changed rapidly, the number of neps included in the fiber bundle detected by the sensor of the carding machine 10 is increased, the number and thickness of small flaws of the yarn detected by the sensor of the rotor spinning machine 50 are varied, and other data are not varied, it is determined that the abnormal portion is the carding machine 10, and it is estimated that the cause of the abnormality is the reduction in removal of the neps.

In the abnormality determination step, when the setting of the generation speed of the carding machine 10 is changed rapidly, the thickness of the fiber bundle detected by the sensor of the carding machine 10 is changed, the thickness of the fiber bundle detected by the sensor of the drawing frame 30 is changed, the number of small defects of the yarn detected by the sensor of the air-jet spinning machine 50 is increased, and the other data is not changed, it is determined that the abnormal portion is the carding machine 10, and the cause of the abnormality is estimated to be the abnormality of the draft device. In this case, in a reporting step described later, a message urging the setting before returning the draft speed of the draft device of the card 10 may be displayed on the display unit 90.

In the abnormality determination step, when the setting of the knot removal amount of the carding machine 10 is changed to the setting of the reduction removal amount, the number of knots included in the fiber bundle detected by the sensor of the carding machine 10 is increased, the number and thickness of small flaws of the yarn detected by the sensor of the air-jet spinning machine 50 are varied, and other data are not varied, it is determined that the abnormal portion is the carding machine 10, and the cause of the abnormality is estimated to be the reduction of the knot removal amount. In this case, in a reporting step described later, the display unit 90 may display a message prompting at least one of a change in setting to increase the production speed, a widening of the distance between the main drum and the top deck of the carding machine 10, a widening of the distance between the main drum and the fixed deck, and an adjustment of the angle of the dust blade.

In the abnormality determination step, when the setting of the drawing speed of drawing frame 30 is changed rapidly, the yarn thickness detected by the sensor of air-jet spinning machine 50 varies, and the other data does not vary, it is determined that the abnormal portion is drawing frame 30, and it is estimated that the cause of the abnormality is an inappropriate draft device of drawing frame 30. In this case, in a reporting step described later, a message urging the draft ratio and/or the pitch of the draft rollers to be changed is displayed on the display unit 90.

In the abnormality determination step, when the setting of the self-leveling device of the draw frame 30 is changed, the yarn thickness detected by the sensor of the air-jet spinning machine 50 is changed, and other data is not changed, it is determined that the abnormal portion is the draw frame 30, and it is estimated that the cause of the abnormality is an inappropriate draft device of the draw frame 30. In this case, in a reporting step described later, a message urging adjustment of the setting of the self-leveler is displayed on the display unit 90.

In the abnormality determination step, when the number and thickness of the small defects of the yarn detected by the sensor of the rotor spinning machine 50 vary and the other data do not vary, it is determined that the abnormal portion is the rotor spinning machine 50, and it is estimated that the cause of the abnormality is the abnormality of the entire draft part of the rotor spinning machine 50. In this case, in the reporting step described later, the display unit 90 may display an abnormality (a gauge of the draft roller, a deposition of fly, or the like) in a certain portion of the entire draft section excluding the front top roller. More specifically, a message urging the cleaning of the stretching portion is displayed on the display portion 90.

In the abnormality determination step, when the number of small defects of the yarn detected by the sensor of the rotor spinning machine 50 is increased and the other data is not changed, it is determined that the abnormal portion is the rotor spinning machine 50, and it is estimated that the cause of the abnormality is the abnormality of the front top roller of the rotor spinning machine 50. In this case, in a reporting step described later, a message urging maintenance (polishing of the front top roller by an operator) or replacement of the front top roller may be displayed on the display unit 90.

In the abnormality determination step, when the yarn detected by the sensor of the rotor spinning machine 50 is changed and the other data is not changed, it is determined that the abnormal portion is the rotor spinning machine 50, and it is estimated that the cause of the abnormality is the abnormality of the entire draft section of the rotor spinning machine 50. In this case, in the reporting step described later, the display unit 90 may display an abnormality (a gauge of the draft roller, a deposition of fly, or the like) in a certain portion of the entire draft section excluding the front top roller. More specifically, a message urging the cleaning of the stretching portion may be displayed on the display portion 90.

In the fiber processing method, a report is made to urge setting adjustment or maintenance of at least any one of the carding machine 10, the drawing frame 30, and the rotor spinning machine 50 to be performed, based on the determination result of the abnormality determination step (reporting step). In the notification step, the controller 70 causes the display unit 90 to display various information prompting the setting adjustment or maintenance.

In the fiber processing method, the optimal setting of the previous step can be examined by using the change of the subsequent step as an index. That is, first, the operator sets a first threshold value, which is a management limit value for the fluctuation of the third quality data, and a second threshold value smaller than the first threshold value, via the operation input unit of the controller 70 (first step). The operator changes the setting data of the card 10 via the operation input part of the card 10 or the controller 70 (second step).

When the third quality data is greater than the first threshold value, the process returns to the second step. When the third quality data is equal to or lower than the first threshold value and equal to or higher than the second threshold value, the controller 70 returns the setting data of the carding machine 10 to the setting data before the second step which is the latest one before. When the third quality data is equal to or less than the second threshold value, the controller 70 returns the setting data of the card 10 to the setting data before the first second step (third step).

In the first step, the second step, and the third step in which the setting of the preceding step is checked using the change in the subsequent step as an index, all the steps of the processing may be manually performed by an operator, or all the steps of the processing may be automatically performed by the controller 70. Part of the processes of the first step, the second step, and the third step may be manually performed by an operator, and the other parts of the processes of the first step, the second step, and the third step may be automatically performed by the controller 70.

In the present embodiment, when the number of neps included in the fiber bundle detected by the sensor of the carding machine 10 increases, the number and thickness of the small spots of the yarn detected by the sensor of the air-jet spinning machine 50 vary, and the other data do not vary, it is determined that the abnormal portion is the raw material, and it is estimated that the cause of the abnormality is the deterioration of the quality of the raw material, or it is determined that the abnormal portion is the carding machine 10, and it is estimated that the cause of the abnormality is the wear of the card wire. The above discrimination results are likely to be easily discriminated based on the maintenance history of the carding machine 10 and the trend of the change in the number of the neps in the past.

Specifically, as shown in fig. 5, in the trend D0 of the change in the number of nodules, the number of nodules increases according to the maintenance cycle of the carding machine 10. The data D1 is roughly along the trend of the change in the number of nodules D0, and therefore it can be judged that there is no problem with the quality of the raw material, due to the wear of the needles of the carding machine 10. Since the data D2 largely deviates from the trend D0, it can be determined that the material itself has a problem.

As described above, in the fiber processing method, the fiber processing system 1, and the fiber processing program P, when the yarn generated by the rotor spinning machine 50 is defective, the raw material having abnormality and the machine of each step (the carding step, the drawing step, and the rotor spinning step) are determined with high accuracy based on the first quality data, the second quality data, and the third quality data. This is because it was found that: there is a correlation between the abnormality of the machine in the raw material and each step and the quality data acquired in association with each step. Therefore, in the fiber processing method, the fiber processing system 1, and the fiber processing program P, it is possible to know the abnormality of the raw material, the carding machine 10, the drawing frame 30, and the rotor spinning machine 50.

In the fiber processing method, the fiber processing system 1, and the fiber processing program P, when a yarn generated by the rotor spinning machine 50 is defective, at least one of the raw material of the yarn, the rotor spinning machine 50 that generates the yarn, the drawing frame 30 that draws the fiber bundle supplied to the rotor spinning machine 50, and the carding machine 10 that generates the fiber bundle supplied to the drawing frame 30 can be discriminated from the occurrence of an abnormality. This makes it possible to know the abnormality of the raw material, the carding machine 10, the drawing frame 30, and the rotor spinning machine 50 in the processing path related to the generation of the defective yarn.

In the fiber processing method, the fiber processing system 1, and the fiber processing program P, when the yarn produced by the rotor spinning machine 50 is defective, the cause of the abnormality is estimated based on the first quality data, the second quality data, and the third quality data. In this case, the specific cause of the abnormality in the raw material, the carding machine 10, the drawing frame 30, and the rotor spinning machine 50 can also be known.

In the fiber processing method, the fiber processing system 1, and the fiber processing program P, the first quality data is data relating to the number of knots included in the fiber bundle and the thickness of the fiber bundle, the second quality data is data relating to the thickness of the fiber bundle, and the third quality data is data relating to the defect and the thickness of the yarn. In this case, the abnormality of the raw material, the carding machine 10, the drawing frame 30, and the rotor spinning machine 50 can be known with high accuracy. The first quality data may be data relating to at least one of the number of nodules included in the fiber bundle and the thickness of the fiber bundle. The third quality data may be data relating to at least one of the defect and the thickness of the yarn.

In the fiber processing method, the fiber processing system 1, and the fiber processing program P, when the yarn generated by the rotor spinning machine 50 is defective, at least one of the raw material, the carding machine 10, the drawing frame 30, and the rotor spinning machine 50 in which an abnormality occurs is determined based on the setting data of the carding machine 10 and the setting data of the drawing frame 30. The following are found: the abnormality of the machine of the raw material and each process has a correlation with the relationship of the quality data acquired in association with each process, and also with the relationship of each setting data of the carding machine 10 and the drawing frame 30. Therefore, based on the setting data of the carding machine 10 and the setting data of the drawing frame 30, the abnormality of the material, the carding machine 10, the drawing frame 30, and the rotor spinning machine 50 can be known with high accuracy.

In the fiber processing method, the fiber processing system 1, and the fiber processing program P, the setting data of the carding machine 10 is data related to the setting of the generation speed of the fiber bundle and the removal amount of the neps removed from the fiber bundle. The setting data of drawing frame 30 is data related to the self-leveler of drawing frame 30 and the setting of the drawing speed of the fiber bundle. In this case, it is possible to know the abnormality of the raw material, the carding machine 10, the drawing frame 30, and the rotor spinning machine 50. For example, it is possible to grasp an abnormality due to an excessively high speed of generating a fiber bundle in the carding machine 10, an abnormality due to an excessively small amount of removing neps in the carding machine 10, an abnormality in detecting the thickness of a fiber bundle by a self-leveler of the drawing frame 30, and an abnormality due to an inappropriate drawing speed in the drawing frame 30. The setting data of the carding machine 10 may be data related to setting of at least one of the speed of generation of the fiber bundle and the amount of removal of the nodules from the fiber bundle. The setting data of drawing frame 30 may be data related to at least one of the setting of the self-leveler of drawing frame 30 and the drawing speed of the fiber bundle.

In the fiber processing method, the fiber processing system 1, and the fiber processing program P, a report is made to prompt setting adjustment or maintenance of at least any one of the carding machine 10, the drawing frame 30, and the rotor spinning machine 50 based on the determined determination result. This enables, for example, an operator to quickly act on the raw material, the carding machine 10, the drawing frame 30, and the rotor spinning machine 50.

In the fiber processing method, the fiber processing system 1, and the fiber processing program P, the display unit 90 displays a display for urging setting adjustment or maintenance of at least any one of the carding machine 10, the drawing frame 30, and the rotor spinning machine 50. This enables the operator to confirm the specific contents of the report prompting the setting adjustment or maintenance.

The fiber treatment method comprises: a first step of setting a first threshold value and a second threshold value; a second step of changing the setting data of the carding machine 10 after the first step; and a third step of returning, after the second step, to the second step when the third quality data is greater than the first threshold value, returning the setting data of the card 10 to the setting data before the second step which is the latest time before the first step when the third quality data is equal to or less than the first threshold value and greater than the second threshold value, and returning the setting data of the card 10 to the setting data before the second step which is the first time when the third quality data is equal to or less than the second threshold value. This makes it possible to investigate the preferable setting data of the carding machine 10 using the variation in the quality of the yarn produced by the rotor spinning machine 50 as an index.

In the second step and the third step, the setting data of draw frame 30 may be changed instead of the setting data of carding machine 10 or in addition to the setting data of carding machine 10. Considering the entire fiber plant in which the fiber processing system 1 is disposed, if the production speed of the carding machine 10 is increased and the production speed of the drawing frame 30 is not increased, there is a possibility that a fiber bundle (sliver) waiting for processing by the drawing frame 30 is generated. In this regard, if such a fiber bundle is generated, only the production speed of the carding machine 10 or only the production speed of the drawing frame 30 may be adjusted.

The embodiments and modifications according to the present invention have been described above, but the present invention is not limited to the embodiments and modifications. For example, the material and shape of each structure are not limited to the above-described material and shape, and various materials and shapes can be used. The present invention can be modified within the scope not changing the gist described in each technical means. The above embodiments and the above modifications may be combined as appropriate. At least some of the above embodiments and modifications may be combined arbitrarily.

In the above embodiment, the controller 70 is configured by a central management computer of the fiber plant, but the controller 70 may be configured by a control device of the rotor spinning machine 50, a control device of the drawing frame 30, a control device of the carding machine 10, or a control device of a portable terminal such as a tablet pc.

In the above embodiment, 1 path group U having the same fiber processing path may be constructed by 1 carding machine 10, 1 drawing frame, and 1 rotor spinning machine. In this case, in the fiber processing method, the fiber processing system 1, and the fiber processing program P, when the yarn generated by the rotor spinning machine 50 is defective, at least one of the raw material of the yarn, 1 rotor spinning machine 50 that generates the yarn, 1 drawing frame 30 that draws the fiber bundle supplied to the rotor spinning machine 50, and 1 carding machine 10 that generates the fiber bundle supplied to the drawing frame 30 is determined to be abnormal. Accordingly, since the number of machines related to the generation of the defective yarn is small, it is possible to accurately know the abnormality of the raw material, the carding machine 10, the drawing frame 30, and the rotor spinning machine 50 in the processing path related to the generation of the defective yarn.

In the above embodiment, the information of the path group U in which the processing paths of the fibers are the same is stored in the storage unit 72 of the controller 70, and the machine of each step in the same processing path is specified based on the stored information. However, the machine identification of each step in the same processing path is not limited to this example, and it is sufficient to identify which machine passes through each step. For example, the cause of the abnormality may be determined using an ID tag or a barcode given to the can. Carding machine 10 may also manage the first quality information sent to controller 70 in association with a can at the moment of filling it with a tow. The drawing frame 30 may be managed by transmitting the second quality information to the controller 70 in association with one can at the time of filling the can with the fiber bundle.

In the above embodiment, the third quality data may be average quality data of a plurality of spinning units of the rotor spinning machine 50, or may be quality data of each spinning unit (spindle unit). When the third quality data is the quality data for each spinning unit, at least one of the spinning unit, the 1 or more drawing frames 30 drawing the fiber bundle supplied to the spinning unit, and the 1 or more carding machines 10 generating the fiber bundle supplied to the drawing frame 30 may be determined to have an abnormality in the abnormality determination step.

In the above embodiment, in the abnormality determination step, one of the raw material, the carding machine 10, the drawing frame 30, and the rotor spinning machine 50, which has an abnormality, may be determined, or two or more of them, which have an abnormality, may be determined. In the above-described embodiment, the display unit 90 displays a message prompting the setting adjustment or maintenance, but instead of the display on the display unit 90 or in addition to the display on the display unit 90, at least one of the display devices provided in the machine of each step or a portable display device may display the message. Alternatively, a sheet on which information relating to the report is printed may be used. In the above embodiment, the quality (first quality data) of the fiber bundle generated in the carding step may be acquired between the carding step and the drawing step by using the measuring device.

In the above embodiment, the number of the carding machines 10 may be 1 or more. Drawing frame 30 may be 1 or more. The number of the rotor spinning machines 50 may be 1 or more. In the abnormality determination step performed by the abnormality determination section 71, at least one of the raw material, 1 or more carding machines 10, 1 or more drawing frames 30, and 1 or more rotor spinning machines 50 in which an abnormality occurs may be determined.

In the above embodiment, the controller 70 is configured by the central management computer, but the controller 70 may be configured by a control device of the rotor spinning machine 50. In this case, the control device of the air-jet spinning machine 50 includes the abnormality determination unit 71, and the abnormality determination step is performed by the control device of the air-jet spinning machine 50. By performing abnormality determination by the control device of the rotor spinning machine 50 disposed downstream of the step, setting adjustment of the tracing-back step and confirmation of maintenance can be easily performed.