CN112593316A - Calculation device, air spinning machine, and lint generation amount output method - Google Patents

Abstract

The invention provides a calculation device (80) provided with calculation units (19b, 57 b). The calculation sections (19b, 57b) calculate the amount of generation of lint to be generated in the air spinning machine (1) based on the yarn speed of the spun yarn running in the air spinning machine (1) and the condition for generating the spun yarn from the fiber bundle in the air spinning machine (1), i.e., the yarn generation condition.

Description

Calculation device, air spinning machine, and lint generation amount output method

Technical Field

The present invention relates to a calculation device, an air spinning machine provided with the calculation device, and a lint generation amount output method.

Background

Conventionally, an air spinning device is known which twists fibers by an air flow to produce a spun yarn. Such an air spinning machine is disclosed in, for example, japanese patent application laid-open No. 2018-53373 (patent document 1).

In the air spinning machine, when the spun yarn is in a broken state, a process such as yarn splicing is performed on the spun yarn. Therefore, unnecessary fiber scraps are generated along with the operation of the air spinning machine. In the present specification, the fiber chips mean chips made of fibers regardless of whether they are twisted in a linear shape.

If the fiber chips are not processed, the fiber chips adhere to the package formed by the spinning machine, and the quality of the package is degraded, resulting in a defect of the spinning machine itself. Therefore, a structure for recovering fiber scraps has been proposed for such a spinning machine.

In a factory where a spinning machine operates, information on the degree of generation of lint is particularly important from the viewpoint of preventing waste of raw material (generation of shortage of raw material). However, in the structure of patent document 1, the amount of the generated lint cannot be quantitatively grasped.

In a conventional spinning machine, the amount of fiber flocks generated cannot be confirmed unless the fiber flocks are collected from each device provided in the spinning machine and measured by a weight meter. Therefore, in the conventional spinning machine, it takes time and trouble to acquire information on the amount of fiber flocks generated, and there is room for improvement.

Disclosure of Invention

The purpose of the present invention is to confirm the amount of lint generated and/or generated from an air spinning machine with a simple structure.

According to a 1 st aspect of the present invention, there is provided a computing device of the following configuration. That is, the calculation device includes a calculation unit. The calculation unit calculates the amount of fiber flocks to be generated and/or generated in the air spinning machine based on the yarn speed of the spun yarn running in the air spinning machine and the yarn generation condition, which is a condition for generating the spun yarn from the fiber bundle in the air spinning machine.

Thus, the amount of the generated lint obtained can be used for various controls of the air spinning machine and/or displayed on a predetermined display unit. Therefore, information useful in the viewpoint of preventing the generation of a shortage of raw material or the like can be easily obtained. Further, since information on the amount of generated lint can be obtained without actually measuring the weight of the lint, a simple configuration can be realized.

In the above-described computing device, the following configuration is preferably formed. That is, the air spinning machine includes an air spinning device and a winding device. The air spinning device produces a spun yarn from the fiber bundle. The winding device winds the spun yarn produced by the air spinning device to form a package. The fiber chips include a yarn end at the start of spinning generated at the start of spinning in the air spinning machine and discarded without being wound into a package. The calculation unit calculates the amount of yarn ends generated at the start of spinning.

This enables calculation of the amount of yarn ends generated at the start of spinning, which occupies most of the fiber chips.

In the above-described computing device, the following configuration is preferably formed. That is, the air spinning machine includes a yarn accumulating device that temporarily accumulates the spun yarn between the air spinning device and the winding device. The fiber flock includes accumulated and removed ends which remain in the yarn storage device and are removed from the yarn storage device after the spun yarn is in a broken state. The calculation unit calculates the amount of generation of the accumulated and removed stubs.

Thus, when the air spinning machine is provided with the yarn storage device, the amount of generation of the accumulated yarn ends can be obtained by calculation, and the accuracy of the calculation result obtained by the calculation unit can be improved.

In the above-described computing device, the following configuration is preferably formed. That is, the air spinning machine includes a draft device. The draft device drafts the fiber bundle. The yarn production conditions under which the calculation unit calculates the amount of the generated lint include: the draft conditions under which the draft device performs draft.

This enables the amount of fiber flocks generated to be accurately calculated based on the draft conditions.

In the above-described computing device, the following configuration is preferably formed. That is, the draft device includes a plurality of draft roller pairs arranged in parallel in the running direction of the fiber bundle. The air spinning machine includes a drawing device for drawing the spun yarn from the air spinning device. The draft condition includes at least one of a draft ratio, a feed ratio, a circumferential speed change rate, and a roller pitch. The draft ratio is a ratio at which the fiber bundle is drawn by the draft device. The feed ratio is a ratio of a supply speed, which is a speed at which the fiber bundle is supplied to the most downstream one of the pair of draft rollers, to a take-up speed, which is a speed at which the staple fiber yarn is taken up by the take-up device. The peripheral speed change rate is a change rate at which the peripheral speed of the most upstream one of the pair of draft rollers changes between the start of spinning and the normal spinning. The roller pitch is a distance between adjacent pairs of draft rollers in the running direction of the fiber bundle.

Thus, when calculating the amount of generation of the lint, the calculation can include a factor that has a large influence on the amount of generation of the lint in the draft condition.

In the above-described computing device, the following configuration is preferably formed. That is, the air spinning machine includes a yarn joining device for joining the spun yarn after the spun yarn is in the cut state. The calculation unit calculates a predicted value of the amount of lint generated based on the predicted number of times of yarn splicing by the yarn splicing device.

Thus, it is possible to obtain a predicted value of the approximate amount of fiber flocks generated from the air spinning machine. Therefore, for example, before spinning by an air spinning machine, the amount of raw material required in the air spinning machine can be identified based on the predicted value. In addition, by using the number of times of the predicted yarn splicing, the amount of the generated lint can be accurately predicted.

In the above-described calculation device, it is preferable that the calculation unit acquires an actual measurement value of an amount of generation of lint actually measured after the air spinning machine performs spinning for a predetermined period, and corrects the predicted value based on the acquired actual measurement value.

This can improve the accuracy of the predicted value.

In the above-described computing device, the following configuration is preferably formed. That is, the fiber chip includes a chip fiber piece which is not twisted into the spun yarn and is detached. The calculation unit calculates the amount of the lint pieces generated.

Thus, the amount of the generated lint can be calculated.

In the above-described calculation device, the yarn producing conditions preferably include: the air spinning machine includes at least one of a type of the air spinning device and a raw material of a spun yarn produced by the air spinning device.

This enables the amount of the scrap fiber pieces generated to be accurately calculated.

In the above-described calculation device, it is preferable that the calculation unit calculates a predicted value of the amount of the generated lint pieces based on a length of time for which the air spinning device performs spinning.

This enables a rough predicted value of the amount of the generated lint to be obtained for the lint sheet.

The above-described calculation device preferably includes a display unit that displays the calculated amount of generated lint.

Thus, the production manager or operator can easily recognize the amount of lint generated by observing the display unit.

The above-described calculation device preferably includes a storage unit that stores the calculated amount of generated lint.

Thus, the calculation device can simplify the calculation by referring to the amount of generation calculated in the past, for example.

Preferably, the above-described calculation device includes an input unit that receives inputs of the yarn speed and the yarn producing condition, and the calculation by the calculation unit includes: when the yarn speed and the yarn producing condition are input from the input unit, the amount of the generated lint stored in association with the input yarn speed and the input yarn producing condition is read.

This can simplify the calculation by the calculation device.

According to the 2 nd aspect of the present invention, there is provided an air spinning machine of the following construction. That is, the air spinning machine includes the calculation device, the air spinning device, and the winding device. The air spinning device produces a spun yarn from a fiber bundle. The winding device winds the spun yarn produced by the air spinning device to form a package.

Thus, in the air spinning machine, the amount of fiber dust generated can be easily calculated.

In the air spinning machine, the following configuration is preferably adopted. That is, the air spinning machine includes a yarn splicing device for splicing a spun yarn cut between the air spinning device and the winding device. The calculation unit of the calculation device calculates a predicted value of the amount of lint generated based on the predicted number of times of yarn splicing by the yarn splicing device, and acquires an actual measurement value based on an execution result of a sampling model for measuring the actual measurement value of the amount of lint generated in association with yarn splicing by the yarn splicing device, and corrects the calculated predicted value based on the actual measurement value.

Thus, it is possible to obtain a predicted value of the approximate amount of fiber flocks generated from the air spinning machine. Since the predicted value is corrected based on the measured value, the accuracy of prediction can be improved.

In the air spinning machine, the following configuration is preferably adopted. That is, the air spinning machine includes a spinning unit and a work carriage. The spinning unit includes the air spinning device and the winding device. The work carriage is provided movably with respect to the spinning unit. The operation cart is at least one of a yarn joining cart for joining a spun yarn cut between the air spinning device and the winding device and a package discharge cart for discharging a package from the winding device.

Thus, in the air spinning machine in which at least one of the yarn splicing and the doffing is performed by the carriage, the amount of the fiber flocks generated only in association with the work carriage can be obtained by calculation.

According to the 3 rd aspect of the present invention, there is provided a lint generation amount output method having the following configuration. That is, the method for outputting the amount of lint generated and/or generated in the air spinning machine is determined based on the yarn speed of the spun yarn running in the air spinning machine and the yarn generation condition in the air spinning machine.

Thus, the information on the amount of lint generated can be easily obtained without actually measuring the weight of the lint. The amount of the generated lint obtained can be used for various controls in the air spinning machine and/or displayed on a predetermined display unit. Therefore, information useful in the viewpoint of preventing the generation of a shortage of raw material or the like can be easily obtained.

Drawings

Fig. 1 is a front view showing the entire structure of the air spinning machine.

Fig. 2 is a side view showing the spinning unit and the yarn joining cart.

Fig. 3 is a block diagram of an air spinning machine.

Detailed Description

Next, an air spinning machine 1 according to an embodiment of the present invention will be described with reference to fig. 1 to 3. In the following description, the terms "upstream" and "downstream" in the air spinning machine 1 denote upstream and downstream in the running direction of each of the sliver (fiber bundle) 26, the fiber bundle 28, and the spun yarn 30 when the spun yarn 30 is wound.

As shown in fig. 1, the air spinning machine 1 includes: a wind box 3, a prime mover case 4, a plurality of spinning units 5, a yarn joining carriage (work carriage) 6, and a doffing carriage (work carriage) 7.

A blower 11 and the like functioning as a negative pressure source are disposed in the air box 3.

A drive source and a central control device 15, which are not shown, are disposed in the prime mover case 4. The drive source provided in the prime mover case 4 includes a motor commonly used by the plurality of spinning units 5.

The central control device 15 can collectively manage and control each part of the air spinning machine 1. The central control device 15 includes a display (display unit) 16, an input unit 17, and a main control unit 18.

The display 16 can display information on the operating conditions of the respective spinning units 5 and/or the yarn quality by an appropriate operation of an operator. The display 16 can display information on lint as described later.

The input unit 17 includes a plurality of hardware keys. The operator can input various information to the central control device 15 by operating the input unit 17. As the input unit 17, a touch panel integrated with the display 16 or the like may be used.

As shown in fig. 3, each of the spinning units 5 includes a unit control unit 19 for controlling the spinning unit 5. The central control device 15 is configured to be able to communicate with the respective unit control units 19. The unit control unit 19 is configured as a known computer as described later. The central control device 15 can communicate with the yarn joining carriage control unit 57 and the doffing carriage control unit 67, which will be described later, in addition to the unit control unit 19. In the present embodiment, each spinning unit 5 is provided with the unit control section 19, but a plurality of (for example, 2 or 8) spinning units 5 may share one unit control section 19.

The air spinning machine 1 is provided with a calculation device 80. In the present embodiment, the calculation device 80 is configured by a combination of the central control device 15, the unit control section 19 of each spinning unit 5, the yarn joining carriage control section 57, and the doffing carriage control section 67.

The plurality of spinning units 5 are arranged side by side in a predetermined direction. As shown in fig. 2, each spinning unit 5 includes a draft device 21, an air spinning device 22, a yarn accumulating device (drawing device) 23, and a winding device 24. These devices 21, 22, 23, and 24 are arranged in order from upstream to downstream.

The draft device 21 includes a plurality of (4 in the present embodiment) draft roller pairs. Each of the draft roller pairs is composed of mutually opposed draft rollers. The draft device 21 sandwiches and conveys the sliver 26 supplied from a sliver cassette (not shown) via a sliver guide between mutually opposed draft rollers, thereby drawing (drafting) the sliver 26 to a predetermined fiber amount (or thickness) to generate a fiber bundle 28.

The 4 draft roller pairs of the present embodiment are a rear roller pair 31, a third roller pair 32, a middle roller pair 33, and a front roller pair 34 in this order from the upstream side. The intermediate roller pair 33 is provided with a rubber belt 35. The rear roller pair 31 has 2 draft rollers 31A and 31B. The third roller pair 32 has 2 draft rollers 32A, 32B. The middle roller pair 33 has 2 draft rollers 33A and 33B. The front roller pair 34 has 2 draft rollers 34A and 34B. Of the 4 draft roller pairs, the rear roller pair 31 is located on the most upstream side, and the front roller pair 34 is located on the most downstream side.

One draft roller of each pair of draft rollers is driven by an electric motor, not shown, and rotates at a predetermined peripheral speed. The rotational speed of each draft roller pair (peripheral speed of the draft rollers) is controlled by the unit control unit 19 and/or the central control device 15.

The air spinning device 22 includes a spinning nozzle (not shown) and a main shaft (hollow guide shaft body) 29. The air spinning device 22 twists the fiber bundle 28 supplied from the draft device 21 by a whirling airflow generated by injecting compressed air from a spinning nozzle into the air spinning device 22, thereby generating a spun yarn 30. The obtained spun yarn 30 is guided to the outside through a fiber passage formed in the main shaft 29.

The spun yarn 30 produced by the air spinning device 22 is supplied to the yarn accumulating device 23. The yarn accumulating device 23 includes a yarn guide member 36, a yarn accumulating roller 37, a accumulating motor 38, and a yarn shedding bar 39.

The yarn guide member 36 catches and guides the spun yarn 30. The yarn guide member 36 is rotated while guiding the spun yarn 30, and thereby the spun yarn 30 can be guided to the outer peripheral surface of the yarn accumulating roller 37.

The yarn accumulating roller 37 can temporarily accumulate the spun yarn 30 wound around the outer peripheral surface thereof. The yarn accumulating roller 37 is rotationally driven at a predetermined rotational speed by a accumulating motor 38. The yarn accumulating roller 37 can draw out the spun yarn 30 from the air spinning device 22 at a predetermined speed and convey the spun yarn to the downstream side.

The yarn accumulating motor 38 can rotationally drive the yarn accumulating roller 37. The driving speed of the storage motor 38 (and hence the peripheral speed of the yarn storage roller 37) is controlled by the unit control section 19.

The yarn take-off lever 39 is disposed near the downstream end of the yarn storage roller 37. The yarn release lever 39 is configured to be swingable between a raised position (yarn release position) and a lowered position (standby position) about a swing shaft 39 a. The doffer bar 39 is not in contact with the running spun yarn 30 when in the lowered position. Therefore, in this state, the spun yarn 30 can be hooked on the yarn hooking member 36 and wound around the yarn accumulating roller 37. When the doffing bar 39 is located at the raised position, it comes into contact with the running spun yarn 30 and pushes up the spun yarn 30 with respect to the yarn storage roller 37. Therefore, in this state, the spun yarn 30 can be detached from the yarn guide member 36. In addition, when the doffing bar 39 is raised in advance in a state where the spun yarn 30 is not wound around the yarn accumulating roller 37, the spun yarn 30 can be prevented from being wound around the yarn accumulating roller 37. The doffer bar 39 is normally held in the lowered position.

A yarn monitoring device 41 is provided between the air spinning device 22 and the yarn accumulating device 23. The spun yarn 30 produced by the air spinning device 22 passes through the yarn monitoring device 41 before being accumulated in the yarn accumulating device 23.

The yarn monitoring device 41 monitors the quality (thickness, etc.) of the running spun yarn 30 with a light-transmitting sensor, and detects a yarn defect contained in the spun yarn 30. The yarn defect may be, for example, an abnormality in the thickness of the spun yarn 30, or mixing of foreign matter. When detecting a yarn defect of the spun yarn 30, the yarn monitoring device 41 transmits a yarn defect detection signal to the unit control section 19. Instead of the light-transmitting sensor, the yarn monitoring device 41 may monitor the quality of the spun yarn 30 using a light-reflecting sensor or a capacitive sensor, for example. The yarn monitoring device 41 may be configured to monitor the tension of the spun yarn 30 as the quality of the spun yarn 30.

Upon receiving the yarn defect detection signal from the yarn monitoring device 41, the unit control section 19 stops the spinning operation of the air spinning device 22. Thereby, the spun yarn 30 is cut (broken). That is, the air spinning device 22 functions as a cutting portion that cuts the spun yarn 30 when the yarn monitoring device 41 detects a yarn defect. The spinning unit 5 may also include a cutter for cutting the spun yarn 30.

The winding device 24 is supplied with the spun yarn 30 passing through the yarn storage device 23. The winding device 24 includes a rocker arm 45, a winding drum 46, and a traverse guide 47.

The swing arm 45 can rotatably support a bobbin 49 (package 50) for winding the spun yarn 30. The rocker arm 45 is supported to be swingable about a fulcrum shaft 48. The winding drum 46 rotates while being in contact with the outer peripheral surface of the bobbin 49 or the package 50, thereby rotationally driving the bobbin 49 or the package 50 in the winding direction. The winding device 24 drives the winding drum 46 by an electric motor, not shown, while reciprocating the traverse guide 47 by a driving mechanism, not shown. Thus, the winding device 24 winds the spun yarn 30 into the package 50 while reciprocating the spun yarn 30.

As shown in fig. 1, a yarn joining carriage travel rail 52 is disposed in the air spinning machine 1 along the direction in which the plurality of spinning units 5 are aligned. The yarn joining carriage 6 is configured to be movable on the yarn joining carriage travel rail 52. Thereby, the yarn joining cart 6 can move relative to the plurality of spinning units 5. When the spun yarn 30 between the air spinning device 22 and the winding device 24 is in a broken state in a certain spinning unit 5 for some reason, the yarn joining cart 6 moves to the spinning unit 5 and performs a yarn joining operation with respect to the spinning unit 5.

As shown in fig. 1 and the like, the yarn joining cart 6 includes: a running wheel 53, a yarn joining device 54, a yarn catching part (a suction pipe 55 and a suction nozzle 56), and a yarn joining cart control part 57.

The suction pipe 55 rotates upward about the base end portion and generates a suction airflow at the tip end portion, thereby sucking and catching the yarn end (upper yarn) of the spun yarn 30 fed from the air spinning device 22. The suction nozzle 56 rotates downward about the base end portion and generates a suction airflow at the tip end portion, thereby sucking and catching the yarn end (lower yarn) of the spun yarn 30 from the package 50 supported by the winding device 24. The suction pipe 55 and the suction nozzle 56 are rotated while catching the spun yarn 30, and the spun yarn 30 is guided to a position where it can be guided to the yarn joining device 54.

The yarn joining device 54 joins the upper yarn and the lower yarn. Thus, the spun yarn 30 is continuously produced by the air spinning device 22 and wound into the package 50 by the winding device 24. In the present embodiment, the yarn splicing device 54 is a twisting device that twists yarn ends to each other by a rotating airflow. The yarn splicing device 54 may be a mechanical knotter, for example, instead of the splicing device.

The yarn joining carriage 6 may be provided with no yarn joining device 54, and the spun yarn 30 may be joined by a repair device. In this case, the yarn joining cart 6 draws the spun yarn 30 from the package 50 and introduces the spun yarn into the air spinning device 22, and then starts the drafting operation of the drafting device 21 and the spinning operation of the air spinning device 22, thereby bringing the spun yarn 30 into a continuous state again. In this configuration, the air spinning device 22 actually functions as a yarn splicing device.

The yarn joining cart control unit 57 controls the operation of each unit provided in the yarn joining cart 6, thereby controlling the yarn joining operation performed by the yarn joining cart 6. The yarn joining cart control unit 57 is configured as a known computer.

As shown in fig. 1, a doffing carriage travel rail 61 is disposed in the air spinning machine 1 along the direction in which the plurality of spinning units 5 are aligned. The doffing carriage 7 is configured to be movable on a doffing carriage travel rail 61. Thereby, the doffing carriage 7 can move relative to the plurality of spinning units 5. When the package 50 wound by a certain spinning unit 5 is fully wound (in a state in which a predetermined amount of the spun yarn 30 is wound), the doffing cart 7 moves to the spinning unit 5 having the package 50, and performs a doffing operation on the spinning unit 5. The doffing operation is an operation of removing the package 50 that is fully wound from the spinning unit 5. The doffing operation may be an operation of mounting an empty bobbin in the spinning unit 5.

As shown in fig. 1 and 3, the doffing carriage 7 includes: a running wheel 62, an empty bobbin storage section 63, a cradle operation arm 64, a yarn drawing arm 65, an empty bobbin supply arm 66, and a doffing cart control section 67.

Empty bobbin storage 63 can store a plurality of empty bobbins 49. The cradle operation arm 64 operates the swing arm 45 of the spinning unit 5, and can remove the fully wound package 50 from the swing arm 45. The yarn drawing arm 65 can be extended and contracted by a cylinder mechanism not shown. A catching portion configured as an air suction device is provided at the tip end portion of the yarn drawing arm 65. The catching section generates a suction airflow and can suck and catch the spun yarn 30 generated by the air spinning device 22. A cutter, not shown, for cutting the spun yarn 30 sucked and caught by the catching portion is provided at the tip of the yarn drawing arm 65. Empty bobbin supply arm 66 can grip empty bobbin 49 supported by empty bobbin storage 63 and supply bobbin 49 to swing arm 45 of spinning unit 5. After the empty bobbin 49 is supplied to the swing arm 45 by the empty bobbin supply arm 66, the swing arm 45 is operated by the swing frame operation arm 64, whereby the empty bobbin 49 can be attached to the spinning unit 5.

The doffing carriage control unit 67 controls the operation of each unit provided in the doffing carriage 7, thereby controlling the doffing operation performed by the doffing carriage 7. The doffing carriage control unit 67 is configured as a known computer.

In the air spinning machine 1 configured as described above, fiber flocks are generated at each part during spinning. The flock comprises a flock fiber sheet and a thread end. In the present specification, the scrap fiber piece indicates fibers that are not twisted into a linear shape, and the end of the yarn indicates fibers that are twisted into a linear shape. The pieces of lint can be soft lint and the ends of the thread can be hard lint. Specific examples of the generation of the lint are as follows.

The air spinning machine 1 is capable of two kinds of spinning, one is outlet spinning and one is ordinary spinning. The outlet yarn spinning is a spinning operation in which the air spinning device 22 alone applies a whirling airflow to the fibers of the fiber bundle 28 to twist and produce a spun yarn 30, and the produced spun yarn 30 is conveyed to the downstream side. The outlet spinning is also called start spinning or self-twist spinning. In general, spinning is a spinning operation for continuously producing the spun yarn 30 wound by the winding device 24 (in other words, the yarn accumulating device 23).

First, generation of a stub will be described. In each spinning unit 5, the spun yarn 30 may be broken between the air spinning device 22 and the winding device 24 for some reason. When the air spinning device 22 starts spinning in this state, the outlet spinning is first performed. The spun yarn 30 based on the outlet yarn is a yarn that is woven transitionally by a method different from the usual one, and is thus treated as a yarn end. Hereinafter, this end may be referred to as a spinning start end. Shortly after the start of the outlet spinning, the air spinning device 22 moves to the normal spinning.

The broken state of the spun yarn 30 may be caused by various reasons, but in most cases, the yarn monitoring device 41 detects a yarn defect of the spun yarn 30 while the spun yarn 30 produced by the air spinning device 22 (by normal spinning) is being wound by the winding device 24. In this case, since the air spinning device 22 stops spinning, the spun yarn 30 is cut by a portion of the air spinning device 22.

The yarn joining device 54 provided in the yarn joining carriage 6 joins the spun yarn 30 in the spinning unit 5 in which the spun yarn 30 is in the cut state. This allows the spun yarn 30 to be continuously formed between the air spinning device 22 and the winding device 24. In the yarn joining operation, the yarn joining device 54 cuts off an excess portion of the upper yarn and the lower yarn by a cutter, not shown, and removes the excess portion as a yarn end. The upper yarn removed by the yarn joining device 54 includes the spun yarn 30 produced by the outlet spinning of the air spinning device 22.

When the spun yarn 30 is cut by the yarn monitoring device 41 detecting a yarn defect, the yarn defect is included in a part of the lower yarn removed by the suction nozzle 56. The end of thread removed from the lower yarn is the spun yarn 30 drawn from the package 50. Hereinafter, this end may be referred to as a package lead-out end.

The spun yarn 30 between the yarn accumulating device 23 and the winding device 24 provided in each spinning unit 5 may be cut for some reason. When the cutoff is detected by an appropriate sensor, the air spinning device 22 automatically stops spinning. As a result, the spun yarn 30 is cut even between the air spinning device 22 and the yarn accumulating device 23. Then, the spun yarn 30 stored in the yarn storage device 23 is drawn out by a stored yarn removing device, not shown, disposed in the vicinity of the yarn storage roller 37, and all of the spun yarn is removed as a yarn end. Hereinafter, the end of a thread at this time may be referred to as a deposit removal end of a thread. In addition, the spun yarn 30 of the yarn storage device 23 is also removed when the yarn splicing by the yarn splicing device 54 fails.

Next, the generation of the scrap fiber pieces will be described. In each spinning unit 5, a predetermined amount of fibers are not twisted into the spun yarn 30 and are separated during the process of twisting the fiber bundle 28 to produce the spun yarn 30. Such a chip fiber sheet is generated in the draft device 21 and/or the air spinning device 22.

The lint thus generated in the air spinning machine 1 is sucked by the suction device provided at an appropriate position. The lint sucked by the suction device is conveyed to the wind box 3 and accumulated in a collection unit provided in the wind box 3. The lint and the scrap fiber pieces may be collected in different collecting units.

The calculation device 80 provided in the air spinning machine 1 can calculate the amount of lint to be generated and/or generated as described above. The following description will be specifically made.

The unit control unit 19 includes a storage unit 19a and a calculation unit 19 b.

Specifically, the unit control unit 19 is configured as a known computer. The computer includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The ROM stores a program for controlling each part of the spinning unit 5 and acquiring various information. The unit control unit 19 can function as the storage unit 19a, the calculation unit 19b, and the like by the cooperation of the hardware and the software.

The unit control unit 19 obtains the amount of fiber flocks to be generated and/or generated in the spinning unit 5 by calculation at the time of the spinning operation of the spinning unit 5 or the like, and transmits the amount to the central control device 15.

The yarn joining cart control unit 57 includes a storage unit 57a and a calculation unit 57 b. The yarn joining cart control unit 57 is configured as a known computer in the same manner as the unit control unit 19. When the yarn joining operation of the yarn joining carriage 6 is performed, the yarn joining carriage control unit 57 obtains the amount of fiber waste (specifically, yarn ends) generated by calculation, and transmits the amount to the central control device 15.

The central control device 15 receives data of the amount of generation of lint from the unit control unit 19 and the yarn joining cart control unit 57. The main control unit 18 provided in the central control device 15 performs a process of collecting the received data.

The main control unit 18 includes a summary unit 18 a.

Specifically, the central control unit 15 is configured as a known computer. The computer includes a CPU, a ROM, a RAM, and the like. The ROM stores a program for displaying various information on the central control unit 15 and receiving setting input by an operator. The central control device 15 can cause the main control unit 18 to function as the aggregation unit 18a by the cooperation of the hardware and the software described above.

Next, the calculation of the amount of yarn ends generated in the lint in accordance with the outlet yarn spinning of the air spinning device 22 (a lint generation amount output method) will be described in detail.

The air spinning device 22 performs the outlet spinning in accordance with the yarn splicing operation and the doffing operation. As described above, all the spun yarn 30 produced in the outlet spinning becomes a yarn end. There are a plurality of factors that affect the amount of thread ends generated at the start of spinning, and these factors are listed below.

The 1 st factor is the time from the start of spinning by the air spinning device 22 to the descent of the doffing bar 39. Hereinafter, this time may be referred to as a doffing time.

The air spinning device 22 starts the yarn discharge spinning, and the spun yarn 30 discharged from the air spinning device 22 is caught by the suction pipe 55 rotating upward on the yarn joining carriage 6. Thereafter, the suction pipe 55 rotates downward, and the spun yarn 30 is guided to the yarn joining device 54. At the beginning of the spinning start of the air spinning device 22, the doffing lever 39 is at the raised position, and therefore the spun yarn 30 generated by the outlet spinning is not wound around the yarn accumulating roller 37. After that, the air spinning device 22 moves from the outlet spinning to the normal spinning, and after a little time has elapsed, the doffing bar 39 descends. As a result, the spun yarn 30 produced by the normal spinning starts to be wound around the yarn accumulating roller 37. Then, the yarn joining operation of the yarn joining device 54 is performed. Since all the spun yarns 30 generated while the doffing bar 39 is raised become ends, the amount of ends generated increases as the doffing time is longer.

The 2 nd factor is the number of times the yarn splicing operation and the doffing operation are performed. Since the yarn end at the start of spinning occurs every 1 time of yarn splicing, the amount of yarn end generated increases as the number of times of yarn splicing execution increases. The same applies to the doffing operation.

The 3 rd factor is the draw ratio. The draft device 21 drafts the fiber bundle 28 so that the spun yarn 30 produced by the air spinning device 22 has a desired thickness. In the draft device 21, the speed of each draft roller pair (the peripheral speed of each draft roller) is appropriately set by the unit control section 19, and the ratio of the drawn fiber bundle 28 can be changed. The draw ratio corresponds to this ratio. As the Draft ratio, for example, there are mdr (main Draft ratio), idr (intermediate Draft ratio), bdr (brake Draft ratio), and tdr (total Draft ratio).

MDR, IDR, BDR, and TDR can be calculated by the following formulas (1) to (4), respectively.

MDR ═ (amount or number of fibers before introduction into the middle roll pair)/(amount or number of fibers after drafting by the front roll pair) · (1)

IDR ═ (amount or number of fibers before introduction into the third roll pair)/(amount or number of fibers after drafting by the middle roll pair) · (2)

BDR ═ (amount or number of fibers before introduction into the rear pair of rolls)/(amount or number of fibers after drafting by the third pair of rolls) · (3)

TDR (amount or number of fibers before introduction into the rear roller pair)/(amount or number of fibers drafted by the front roller pair) · (4)

MDR, IDR, BDR, and TDR can also be calculated by the following formulas (5) to (8).

MDR ═ (speed of front roll pair)/(speed of middle roll pair) · (5)

IDR ═ (speed of middle roll pair)/(speed of third roll pair) · (6)

BDR (speed of third roll pair)/(speed of back roll pair) · (7)

TDR＝MDR×IDR×BDR· · · (8)

The "speed" in expressions (5) to (7) represents the peripheral speed (angular velocity × radius) of the draft roller of each draft roller pair.

The draft ratio, particularly TDR, gives a large influence on the amount of yarn generation. When the TDR is small, the fiber bundle 28 is not stretched so much in the draft device 21, and therefore the spun yarn 30 produced by the air spinning device 22 becomes thick. As a result, the amount of thread ends generated increases. In calculating the head of line generation, MDR and BDR may be considered in addition to TDR.

The 4 th factor is the yarn speed. As the yarn speed is higher, the spun yarn 30 is supplied from the air spinning device 22 at a higher speed, and thus the amount of yarn ends generated increases.

The 5 th factor is the circumferential velocity change rate. In the present specification, the circumferential speed change rate means a change in the circumferential speed of the rear roller pair 31 between the outlet spinning and the normal spinning performed in the air spinning machine 1 in a ratio.

To describe in detail, in the air-jet spinning machine 1 of the present embodiment, for the purpose of reliably producing the spun yarn 30 during the outlet spinning, the spun yarn 30 having a thickness different from that during the normal spinning may be produced. The thickness of the spun yarn 30 is changed by changing the speed of the rear roller pair 31. The circumferential speed change rate described above indicates the degree of change in the speed. In general, as the circumferential speed change rate is further from 1, it takes a longer time to move from the outlet yarn to the normal yarn, and thus the amount of yarn ends generated increases.

The 6 th factor is the feed ratio. The feed ratio is a ratio of the peripheral speed of the front roller pair 34 to the peripheral speed of the yarn storage roller 37 provided in the yarn storage device 23 (the drawing speed of the spun yarn 30 drawn by the yarn storage device 23). The peripheral speed of the pair of front rollers 34 can be referred to as the feeding speed of the front roller pair 34 to feed the fiber bundle 28. The peripheral speed of the yarn accumulating roller 37 can be referred to as a drawing speed at which the yarn accumulating roller 37 draws the spun yarn 30 on the downstream side of the air spinning device 22 when the spun yarn 30 is wound. In general, the smaller the feed ratio, the more the spun yarn 30 is produced at a high speed in the air spinning device 22, and therefore the amount of yarn ends generated increases.

The 7 th factor is the roll pitch (gauge width). The roller pitch represents a distance between adjacent pairs of draft rollers in the running direction of the fiber bundle 28 (sliver 26) in the draft device 21. In fig. 2, as an example of the roller spacing, the roller spacing between the rear roller pair 31 and the third roller pair 32 is shown by a distance D1. The roller pitch is represented as an axial pitch between the draft rollers 31A and 32A of the adjacent pair of draft rollers located on one side with respect to the running path of the fiber bundle 28 (sliver 26). The roller pitch actually indicates the distance from each other of the points at which the fiber bundle 28 is nipped by the 2 draft roller pairs. As the distance increases, the length from the position where the sliver 26 is supplied to the draft device 21 to the position where the fiber bundle 28 is discharged increases, and thus the amount of yarn ends generated increases.

The calculation unit 19b calculates the amount of yarn ends generated at the start of spinning, taking all or a part of the above factors into consideration. When the basic method is simply explained, the length of the yarn end generated by the 1-time outlet spinning can be roughly obtained by multiplying the yarn doffing time described above by the yarn speed at the time of outlet spinning. The yarn end length is multiplied by the weight per unit length of the spun yarn 30, whereby the yarn end generation amount of the 1-time spun yarn can be obtained. The weight per unit length of the spun yarn 30 differs depending on the yarn production conditions and the like. The calculation unit 19b uses the count information transferred from the central control device 15 for the weight of the spun yarn 30 per unit length.

In the present embodiment, the calculation unit 19b of the unit control unit 19 can calculate the amount of thread ends (accumulated and removed thread ends) generated when the spun yarn 30 remaining in the yarn accumulating device 23 after the spun yarn 30 is cut. Specifically, the length of the spun yarn 30 accumulated in the yarn accumulator 23 can be obtained by an unillustrated accumulated amount sensor provided in the vicinity of the yarn accumulating roller 37. The accumulation amount sensor can be configured as an optical sensor, for example. The yarn end generation amount can be obtained by multiplying the length of the accumulated yarn by the weight per unit length of the spun yarn 30. However, the calculation of the amount of generation of the accumulated and removed stubs may be omitted.

The calculation unit 19b of the unit control unit 19 can also calculate the amount of the lint generated as the air spinning device 22 spins. Specifically, the main shaft 29 of the air spinning device 22 can be appropriately selected from a plurality of types prepared in advance and used for appropriately spinning even under various raw materials and conditions. For example, the outer diameter of the upstream side of the main shaft 29 is different depending on the kind. In the present embodiment, the kind of the main shaft 29 corresponds to the kind of the air spinning device 22. Information on the spindle 29 to be used is input by the operator together with information on the material for spinning, and is stored in the storage unit 19a in advance.

The amount of the flock sheet generated in the air spinning device 22 differs depending on the yarn speed, the type of the main shaft 29, the material of the spun yarn, the draft condition, and the like. The storage unit 19a stores the amount of the lint generated per unit time in combination of the conditions. The calculation unit 19b multiplies the amount of the lint generated per unit time by the driving time of the air spinning device 22, thereby determining the amount of the lint generated.

The calculation unit 57b of the yarn joining carriage control unit 57 can calculate the amount of thread ends pulled out from the package 50 side and removed for every 1-time yarn joining. Specifically, the calculating section 57b calculates the length of the spun yarn 30 drawn from the package 50 and removed. When the spun yarn 30 is cut by detecting a yarn defect, the length of the spun yarn 30 to be removed from the package 50 differs depending on the length of the spun yarn 30 occupied by the yarn defect. When the yarn joining carriage 6 draws the lower yarn from the package 50 by the suction nozzle 56, the package 50 is rotated in the reverse direction to the winding direction by the reversing roller driven by an electric motor, not shown, provided in the yarn joining carriage 6. The length of the lower yarn drawn from the package 50 can be obtained by multiplying the operating time of the electric motor by the peripheral speed of the package 50 in the reverse rotation. The package drawn length is multiplied by the weight per unit length of the spun yarn 30 to obtain the amount of yarn drawn from the package. The count information transferred from the central control device 15 is used as the weight per unit length of the spun yarn 30.

The unit control unit 19 obtains the amount of fiber waste (lint or waste fiber pieces) generated in the spinning unit 5 controlled by the unit control unit 19, and transmits the amount of the generated fiber waste to the central control device 15.

When the yarn joining operation is performed by a certain spinning unit 5 and the amount of fiber waste (package leading-out yarn) is acquired, the yarn joining cart control unit 57 transmits the amount of fiber waste to the central control device 15. At this time, the yarn joining carriage control section 57 transmits information for specifying the spinning unit 5 to the central control device 15 together.

The yarn end generated at the time of the doffing operation is the yarn end at the start of spinning, and the doffing carriage control section 67 calculates the amount of generation of the lint in the same manner as the yarn joining carriage control section 57. However, the calculation of the amount of lint generated by the doffing carriage control unit 67 may be omitted.

The central control device 15 accumulates the amount of the received lint generation and stores the accumulated value. Further, the calculation device 80 calculates an accumulated value of the generation amount of the lint for each spinning unit 5.

The main control unit 18 of the central control device 15 outputs information based on the amount of lint generated, which is received from the unit control unit 19 and the yarn joining cart control unit 57, to the display 16. The main control unit 18 can display the amount of fiber flocks generated in the entire air spinning machine 1 on the display 16, for example. However, the amount of fiber waste generated per spinning unit 5 can be displayed. In addition, the amount of lint generated can be indicated by the reason of the generation of lint (for example, a yarn splicing operation and a doffing operation).

The operator can know the amount of lint generated by observing the display 16. In the present embodiment, the display 16 merely displays the amount of the lint generated, but the amount of the lint generated can be appropriately used for control. For example, when the cumulative value of the amount of lint generated exceeds a threshold value, a control may be performed to report by a lamp or the like and prompt the collection of the lint. Further, since the amount of the used sliver 26 can be calculated by adding the amount of the generated lint to the amount of the produced spun yarn 30, the calculated amount of the generated lint can be used for control for notifying the operator of the decrease in the remaining amount of the sliver 26.

The calculation of the amount of the generation of the scrap fiber pieces in the fiber scrap can be omitted. In this case, the main control unit 18 displays only the thread end generation amount as the generation amount of lint on the display 16.

The amount of generation of the lint in the air spinning machine 1 is closely related to the number of times of the yarn splicing work performed in the air spinning machine 1 to some extent. Therefore, the calculation device 80 can predict the amount of lint generated based on the predicted value of the number of times the yarn splicing device 54 performs yarn splicing within a predetermined period (for example, a predetermined batch, a predetermined shift). Hereinafter, the predicted value of the number of times of performing the yarn joining in a predetermined period may be referred to as a predicted value of the number of times of yarn joining. If the predicted value of the number of times of yarn splicing is acquired in some form, the calculation device 80 may calculate the predicted value of the amount of lint generated based on the acquired predicted value of the number of times of yarn splicing. The calculated predicted value may be displayed on the display 16. The predicted value of the number of times of yarn splicing can be obtained based on the actual number of times of yarn splicing performed when the air spinning machine 1 is operated under the same conditions in the past, for example, with reference to the operation history information stored in the central control device 15.

The predicted value of the amount of generation of lint calculated by the calculation device 80 can be referred to by an operator when the operator sets a defect discrimination threshold value used by the yarn monitoring device 41 to detect a yarn defect.

When the yarn monitoring device 41 detects a yarn defect, the yarn defect is discarded as a yarn end. Therefore, the quality of the produced spun yarn 30 is improved by strictly discriminating the defect, and the amount of the end of thread generated is reduced in a trade-off relationship. In consideration of this, for example, when the predicted value of the amount of generation of the lint calculated by the calculation unit 19b is sufficient for the allowable range of the operator, the defect discrimination threshold of the yarn monitoring device 41 may be set to be strict, and the criterion for defect discrimination of the spun yarn 30 may be set to be strict. Conversely, it is also possible to place importance on the reduction in the amount of lint generated and to set the defect discrimination threshold to be less strict.

In order to improve the accuracy of predicting the amount of generation of lint, the calculation device 80 according to the present embodiment can correct the predicted value based on the actual measurement value of the amount of generation of lint. The measured value of the amount of generation of the lint can be obtained by actually measuring the weight of the lint recovered from the air spinning machine 1 (execution of a sampling model). The operator inputs an actual measurement value of the amount of lint generated, for example, using the input unit 17. At this time, the operator also inputs the information on the collected lint, for example, the lint corresponding to the time when the air spinning machine 1 is operated.

The calculation device 80 obtains an actual measurement value of the amount of lint generated based on the input. Further, the calculation device 80 acquires the number of times of yarn splicing performed during the input operation period. The number of times of execution of the yarn splicing can be obtained by referring to the operation history information stored in the central control device 15. The calculation device 80 obtains the relationship between the measured weight of the lint and the number of times of execution of the yarn splicing, and determines a parameter (for example, a correction coefficient) for correcting the predicted value of the lint based on the relationship.

As the actual measurement value of the amount of generation of lint, in addition to the value measured during the actual operation of the air spinning machine 1, the actual measurement value measured when the air spinning machine 1 is temporarily operated by a special model can be used. Hereinafter, this model may be referred to as a sampling model. The operation period of the air spinning machine 1 under the sampling pattern can be arbitrarily set. The operation of the air spinning machine 1 of the sampling model is almost the same as that in the actual operation. When the air spinning machine 1 is operated by the sampling model, the number of times is counted every time the yarn joining device 54 is operated. After the operation under the sampling pattern is completed, the operator measures the amount of lint generated and inputs the result to the central control unit 15. The calculation device 80 determines parameters for correcting the predicted value of the lint. After that, the actual operation of the air spinning machine 1 is started.

As described above, the calculation device 80 includes the calculation units 19b and 57 b. The calculation sections 19b, 57b calculate the amount of generation of lint generated and/or generated in the air spinning machine 1 based on the yarn speed of the spun yarn 30 running in the air spinning machine 1 and the yarn generation condition as a condition for generating a yarn from the fiber bundle 28.

Thereby, the amount of generated lint obtained can be used for various controls in the air spinning machine 1 and/or displayed on the display 16. Therefore, information useful in the viewpoint of preventing the occurrence of a shortage of raw material or the like can be easily obtained. Further, since information on the amount of generated lint can be obtained without actually measuring the weight of the lint, a simple configuration can be realized.

The air spinning machine 1 of the present embodiment includes an air spinning device 22 and a winding device 24. The air spinning device 22 produces a spun yarn 30 from the fiber bundle 28. The winding device 24 winds the spun yarn 30 produced by the air spinning device 22 to form a package 50. The fiber dust includes a spinning start end generated at the spinning start time of the air spinning machine 1 and discarded without being wound into the package 50. The calculating section 19b calculates the amount of yarn ends generated at the start of spinning.

This enables calculation of the amount of yarn ends generated at the start of spinning, which occupies most of the fiber chips.

The air spinning machine 1 of the present embodiment includes a yarn accumulating device 23 that temporarily accumulates the generated spun yarn 30. The flock is contained in the accumulated yarn accumulated in the yarn accumulator 23 and removed from the yarn accumulator 23 after the spun yarn 30 is in a cut state. The calculation unit 19b calculates the amount of generation of the accumulated and removed stubs.

Thus, when the air spinning machine 1 includes the yarn accumulating device 23, the amount of generation of the accumulated yarn ends can be obtained by calculation, and the accuracy of the calculation result of the calculating unit 19b can be improved.

The air spinning machine 1 of the present embodiment includes a draft device 21. The draft device 21 drafts the fiber bundle 28. The yarn generating conditions when the calculating unit 19b calculates the amount of the generated lint include draft conditions under which the draft device 21 performs draft.

This enables the amount of fiber flocks generated to be accurately calculated based on the draft conditions.

The draft device 21 of the present embodiment includes a plurality of draft roller pairs 31, 32, 33, and 34 arranged side by side in the running direction of the fiber bundle 28. The air spinning machine 1 includes a yarn accumulating device 23 that draws out a spun yarn from the air spinning device 22. The draft condition includes at least one of a draft ratio, a feed ratio, a circumferential speed change rate, and a roller pitch. The draft ratio is a ratio at which the fiber bundle 28 is drawn by the draft device 21. The feed ratio is a ratio of a feed speed as a speed at which the front roller pair 34 feeds the fiber bundle 28 to a take-up speed as a speed at which the spun staple yarn 30 spun by air is taken up downstream by the yarn accumulating device 23. The circumferential speed change rate is a change rate at which the circumferential speed of the rear roller pair 31 changes at the start of spinning and at the time of normal spinning. The roller pitch is a distance between adjacent pairs of draft rollers in the running direction of the fiber bundle 28.

Thus, when calculating the amount of generation of the lint, the calculation can include a factor having a large influence on the amount of generation of the lint in the draft condition.

In the present embodiment, the air spinning machine 1 includes a yarn splicing device 54. The yarn joining device 54 joins the spun yarn 30 after the spun yarn 30 is in the cut state. The calculation unit 19b calculates a predicted value of the amount of lint generated based on the predicted number of times the yarn splicing device 54 performs yarn splicing within a predetermined time.

This enables an approximate predicted value of the amount of generated fiber flocks to be obtained for the air spinning machine 1. Therefore, for example, before spinning by the air spinning machine 1, the amount of the material required in the air spinning machine 1 can be identified based on the predicted value. In addition, by using the number of times of the predicted yarn splicing, the amount of the generated lint can be accurately predicted.

In the present embodiment, the calculation unit 19b acquires an actual measurement value as an amount of generation of lint actually measured after the air spinning machine 1 performs spinning for a predetermined period of time, and corrects the predicted value based on the acquired actual measurement value.

This can improve the accuracy of the predicted value.

In the present embodiment, the fiber tow includes a tow fiber sheet that is not twisted into the spun yarn 30 and is separated therefrom. The calculation unit 19b calculates the amount of the lint pieces generated from the lint.

Thus, the amount of the generated lint can be calculated.

In the present embodiment, the yarn producing conditions referred to when the calculating unit 19b calculates the amount of the generated lint are the type of the air spinning device 22 provided in the air spinning machine 1 and the raw material of the spun yarn 30 produced by the air spinning device 22.

This enables the amount of the scrap fiber pieces generated to be accurately calculated.

In the present embodiment, in the calculation device 80, the calculation unit 19b calculates a predicted value of the amount of the generated lint pieces based on the length of time for which the air spinning device 22 performs spinning.

Thus, a predicted value of the amount of scrap fiber pieces contained in the fiber scrap can be obtained.

The computing device 80 of the present embodiment includes a display 16. The display 16 displays the calculated amount of the generated lint.

Thus, the production manager or operator can easily recognize the amount of lint generated by observing the display 16.

The calculation device 80 of the present embodiment includes a storage unit that stores the calculated amount of generated lint.

Thus, the calculation device 80 can simplify the calculation by referring to the amount of generation calculated in the past, for example.

The calculation device 80 of the present embodiment includes a storage unit that stores past measured values in association with the yarn speed and the yarn producing condition, and an input unit 17 that receives inputs of the yarn speed and the yarn producing condition. When the yarn speed and the yarn producing condition are input from the input unit 17, the calculation unit 19b may read the actual measurement values stored in association with the input yarn speed and the yarn producing condition from the storage unit 19a instead of calculating the amount of fiber waste generated.

This can simplify the calculation by the calculation device 80.

The air spinning machine 1 of the present embodiment includes the calculation device 80, the air spinning device 22, and the winding device 24. The air spinning device 22 produces a spun yarn 30 from the fiber bundle 28. The winding device 24 winds the spun yarn 30 produced by the air spinning device 22 to form a package 50.

Thus, in the air spinning machine 1, the amount of generation of the lint can be easily calculated.

The air spinning machine 1 of the present embodiment includes a yarn splicing device 54. The yarn joining device 54 joins the spun yarn cut between the air spinning device 22 and the winding device 24. The calculation unit 19b of the calculation device 80 calculates a predicted value of the amount of generation of lint based on the predicted number of times of yarn splicing by the yarn splicing device 54, acquires an actual measurement value based on the result of execution of a sampling model for measuring the actual measurement value of the amount of generation of lint generated in association with yarn splicing by the yarn splicing device 54, and corrects the calculated predicted value by the actual measurement value.

This enables a rough predicted value of the amount of generated lint to be obtained for the lint generated from the air-spinning machine 1. Since the predicted value is corrected based on the measured value, the accuracy of prediction can be improved.

The air spinning machine 1 of the present embodiment includes a spinning unit 5 having an air spinning device 22 and a winding device 24, and a work vehicle provided movably with respect to the spinning unit 5. The work cart is at least one of the yarn joining cart 6 that joins the spun yarn 30 cut between the air spinning device 22 and the winding device 24, and the doffing cart 7 that discharges the package 50 from the winding device 24.

Thus, in the air spinning machine 1 in which the yarn joining operation is performed by the yarn joining carriage 6 and the doffing operation is performed by the doffing carriage 7, the generation amount of the lint to be generated and/or generated already only in relation to the yarn joining carriage 6 and/or the doffing carriage 7 can be obtained by calculation.

While the preferred embodiments of the present invention have been described above, the above-described configuration can be modified as follows, for example. The following modifications can be combined as appropriate.

The calculation device 80 may omit the function of predicting the amount of lint generated.

The calculation device 80 may be configured to calculate only the amount of thread ends or the amount of lint pieces as the amount of lint.

In the calculation of the lint (the lint sheet and the lint), some of the parameters described in the above embodiment may be omitted, and other appropriate parameters may be used.

In the above embodiment, the calculation unit 19b of the unit control unit 19 calculates the amount of generation of lint for each spinning unit 5. Similarly, the calculation unit 57b of the yarn joining carriage control unit 57 calculates the amount of the lint generated by the yarn joining carriage 6. However, these calculations may be realized by a calculation unit provided in the central control device 15 (main control unit 18). Instead of providing 1 unit control unit 19 for each spinning unit 5, 1 unit control unit 19 may be provided for a plurality of spinning units 5.

In the above-described embodiment, the unit control unit 19 includes the storage unit 19a, but the central control device may include the storage unit 19 a.

The time length for which the air spinning device 22 performs spinning for the calculation section 19b to calculate the predicted value of the amount of the generated lint can be any time length during the execution of spinning. For example, the time length may be an execution time length (period) of a plurality of batches of spun yarns, or may be an execution time length (period) of one-time spinning.

In the above embodiment, the air spinning machine 1 includes the calculation device 80. However, the calculation device 80 may be configured as a separate device without being installed in the air spinning machine 1. For example, the calculation device 80 may be a management device placed in a fiber factory in which the air spinning machine 1 is installed. The computing device 80 does not need to be installed in the fiber factory where the air spinning machine 1 is installed, and may be a computer on a network including a cloud.

In the above embodiment, the yarn speed and the yarn generating condition are input from the input unit 17. However, at least one of the yarn speed and the yarn producing condition may not be directly input to the air spinning machine 1. For example, when the calculation device 80 is another management device or computer, at least any one of the yarn speed and the yarn producing condition may be input from these devices.

At least one of the display 16, the input unit 17, the aggregation unit 18a, the storage unit 19a, and the calculation unit 19b provided in the calculation device 80 may be provided in a different management device or computer, instead of the air spinning machine 1.

As a configuration for drawing the spun yarn 30 from the air spinning device 22, a known delivery roller pair may be used instead of the yarn accumulating roller 37. That is, the drawing device may be a device including a pair of output rollers. In this case, the accumulated removal stubs are not generated. When the spun yarn 30 is drawn out from the air spinning device 22 by the pair of delivery rollers, at least one of the yarn accumulating device 23, the slacking off tube using the suction airflow, and the mechanical compensator may be provided downstream of the pair of rollers.

In the above embodiment, the TDR in the draft ratio is obtained from the relationship between the peripheral speeds of the rear roller pair 31 and the front roller pair 34. The TDR is not limited to this example, and may be obtained from the relationship between the circumferential speeds of the rear roller pair 31 and the yarn accumulating roller 37. In addition, when the air spinning machine includes the delivery roller pair, the TDR may be obtained from a relationship between circumferential speeds of the rear roller pair 31 and the delivery roller pair.

The central control device 15 may output information on the amount of generated lint obtained to another computer connected to the central control device 15 through a network, or may print the information on paper or the like by a printer. That is, the information on the calculated amount of generated lint may be displayed on another display device without being displayed on the display 16 of the air spinning machine 1.

In the above-described embodiment, the calculation result of the amount of lint generated is displayed on the display 16 provided in the central control device 15. However, for example, a display unit may be provided in at least one of the spinning unit 5, the yarn joining carriage 6, and the doffing carriage 7, and the calculation result of the amount of generated lint may be displayed on the display unit.

The air spinning machine 1 may include a device in which each spinning unit 5 is associated with yarn splicing, instead of the yarn splicing cart 6.

In the above-described embodiment and modification, each device is arranged such that the spun yarn 30 supplied on the upper side is wound on the lower side in the height direction. However, each device may be arranged so that the yarn fed on the lower side is wound on the upper side.

In the above embodiment and modification, the calculation device 80 calculates the amount of generation of lint every time based on the yarn speed and the yarn generation condition. However, the calculated result may be preliminarily made into a database as a predicted value, and the calculation device 80 may use the predicted value read out from the database. Alternatively, the past measured values and the like may be previously made into a database in association with the yarn speed and the yarn producing condition, and when the yarn speed and the yarn producing condition are input, the computing device 80 may read the measured values and the like from the database (for example, cloud). That is, in this specification, "calculation" includes "reading". In the case of reading, only reading may be performed, or both reading and calculation may be performed. In the latter case, the read result may be used to recalculate the amount of lint generated.

In view of the above teachings, it should be apparent that many modifications and variations of the present invention are possible. Therefore, it is to be understood that the present invention can be practiced in a method other than that described in the present specification within the claims.

Claims (17)

1. A computing device, characterized in that,

the yarn spinning device is provided with a calculation unit that calculates the amount of generation of lint to be generated and/or the amount of generation of generated lint on the basis of the yarn speed of a spun yarn running in an air spinning machine and a yarn generation condition, which is a condition for generating the spun yarn from a fiber bundle in the air spinning machine.

2. The computing device of claim 1,

the air spinning machine comprises:

an air spinning device for producing the spun yarn from the fiber bundle; and

a winding device for winding the spun yarn produced by the air spinning device to form a package,

the fiber chip includes a yarn end at the start of spinning generated at the start of spinning by the air spinning machine and discarded without being wound into a package,

the calculation unit calculates the amount of yarn ends generated at the start of spinning.

3. The computing device of claim 1 or 2,

the air spinning machine includes a yarn storage device that temporarily stores the spun yarn between the air spinning device and the winding device,

the flock includes accumulated and removed ends of thread which remain in the yarn storage device and are removed from the yarn storage device after the staple fiber yarn is in a broken state,

the calculation unit calculates the amount of generation of the accumulated and removed stubs.

4. The computing device of any one of claims 1-3,

the air spinning machine is provided with a drafting device for drafting the fiber bundle,

the yarn production conditions under which the calculation unit calculates the amount of lint generated include: a draft condition based on the draft of the draft device.

5. The computing device of claim 4,

the draft device has a plurality of draft roller pairs arranged side by side in a running direction of the fiber bundle,

the air spinning machine is provided with a leading-out device for leading out the staple fiber yarn from an air spinning device,

the draft conditions include at least any one of the following conditions:

a draft ratio at which the fiber bundle is drawn by the draft device;

a feed ratio of a feed speed, which is a speed at which the fiber bundle is fed to the most downstream pair of draft rollers, to a take-up speed, which is a speed at which the staple fiber yarn is taken up by the take-up device;

a peripheral speed change rate at which a peripheral speed of an uppermost draft roller pair of the draft roller pairs changes between at a start of spinning and at a time of normal spinning; and

a roller pitch, a distance between adjacent pairs of draft rollers in a running direction of the fiber bundle.

6. The computing device of any one of claims 1-5,

the air spinning machine is provided with a yarn splicing device for splicing the staple fiber yarn after the staple fiber yarn is in a broken state,

the calculation unit calculates a predicted value of the amount of lint generated based on the predicted number of times of yarn splicing by the yarn splicing device.

7. The computing device of claim 6,

the calculation unit acquires an actual measurement value of an amount of lint generated actually measured after the air spinning machine performs spinning for a predetermined period, and corrects the predicted value based on the acquired actual measurement value.

8. The computing device of any one of claims 1 to 7,

the fiber flock comprises a flock fiber sheet which is detached without twisting into the staple fiber yarn,

the calculation unit calculates the amount of the flock fiber sheet generated.

9. The computing device of claim 8,

the yarn forming conditions include: and a fiber spinning device for spinning the spun yarn, wherein the fiber spinning device is provided with a plurality of types of air spinning devices, and the raw material of the spun yarn is generated by the air spinning devices.

10. The computing device of claim 8 or 9,

the calculation unit calculates a predicted value of the amount of the generated lint fiber sheet based on the length of time for which the spinning is performed by the air spinning device.

11. The computing device of any one of claims 1-10,

the device is provided with a display unit for displaying the calculated amount of the generated lint.

12. The computing device of any one of claims 1 to 11,

the device is provided with a storage part for storing the calculated amount of the generated lint.

13. The computing device of any one of claims 1-12,

an input unit for receiving the yarn speed and the yarn producing condition,

the calculation by the calculation unit includes: when the yarn speed and the yarn producing condition are input from the input unit, the amount of the generated lint stored in association with the input yarn speed and the input yarn producing condition is read.

14. An air spinning machine is characterized by comprising:

the computing device of any one of claims 1-13;

an air spinning device for producing a spun yarn from a fiber bundle; and

and a winding device for winding the spun yarn produced by the air spinning device to form a package.

15. Air spinning machine according to claim 14,

the yarn splicing device is provided for splicing a spun yarn cut between the air spinning device and the winding device,

the calculation unit calculates a predicted value of the amount of lint generated based on the predicted number of times of yarn splicing by the yarn splicing device,

acquiring an actual measurement value based on an execution result of a sampling model for measuring an actual measurement value of an amount of generation of lint generated in association with yarn splicing by the yarn splicing device,

correcting the calculated predicted value by the measured value.

16. The air spinning machine according to claim 14 or 15, characterized by comprising:

a spinning unit having the air spinning device and the winding device; and

a working carriage provided movably with respect to the spinning unit,

the operation cart is at least one of a yarn joining cart for joining the spun yarn cut between the air spinning device and the winding device and a doffing cart for discharging the package from the winding device.

17. A method for outputting the amount of fiber flocks generated,

the method includes determining a generation amount of lint to be generated and/or generated in an air spinning machine based on a yarn speed of a spun yarn operated in the air spinning machine and a yarn generation condition in the air spinning machine.

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