CN112442768B

CN112442768B - Management device for spinning machine and spinning machine with the same

Info

Publication number: CN112442768B
Application number: CN202010794876.3A
Authority: CN
Inventors: 须佐见浩之
Original assignee: Murata Machinery Ltd
Current assignee: Murata Machinery Ltd
Priority date: 2019-08-30
Filing date: 2020-08-10
Publication date: 2023-09-12
Anticipated expiration: 2040-08-10
Also published as: JP2021038476A; CN112442768A

Abstract

The present invention relates to a management device for a spinning machine and a spinning machine with the management device. A management device (9) manages a spinning machine (100) provided with a spinning device (3) and a lint recovery device (83). The spinning device (3) generates spun yarn (Y). A lint recovery device (83) recovers lint generated during the generation of the spun yarn (Y). The management device (9) is provided with a control device (90). The static pressure in the lint recovery device (83) varies according to the amount of lint recovered and stored by the lint recovery device (83). The control device (90) calculates the generation amount of the fiber scraps of the spinning frame (100) based on the static pressure.

Description

Management device for spinning machine and spinning machine with the same

Technical Field

The present invention relates generally to a management device for a spinning machine that generates and winds a yarn.

Background

Conventionally, a spinning machine is known which generates and winds a yarn from a raw material. Japanese patent publication No. 62-22908 (patent document 1) and japanese patent application laid-open No. 2015-183338 (patent document 2) disclose spinning frames and yarn winding machines as such spinning machines, respectively.

In the spinning frame of patent document 1, when yarn breakage occurs during winding of the yarn, an operator performs yarn splicing. The spinning machine of patent document 1 is configured to monitor the broken yarn and calculate the production loss (corresponding to the amount of yarn return) caused by the broken yarn.

The yarn winding machine of patent document 2 includes a yarn return storage tank for collecting the yarn returned by the yarn joining operation. When an operator collects the return wire from the return wire storage box, the weight of the collected return wire is often measured by a measuring device, and the production loss is managed. However, each time measurement is performed by a measuring instrument, the measurement is troublesome and sometimes forgotten, and there is room for improvement in terms of the accuracy of the management of production loss. The measurement of the return wire by the operator may be performed after the lapse of time, and a time lag may occur in the management of the production loss.

In the spinning machine, unlike the case where the yarn return occurs due to the yarn joining operation or the like, lint is generated during the yarn generation process, which also becomes a cause of the material loss. In order to grasp the raw material loss in yarn production, the demand for calculating the amount of lint generated when producing yarn is increasing.

Disclosure of Invention

The invention aims to provide a management device and a spinning machine capable of efficiently and accurately calculating the generation amount of fiber scraps.

According to a first aspect of the present invention, there is provided a management apparatus having the following structure. That is, the management device is a management device of a spinning machine including a spinning device and a lint recovery device. The spinning device generates yarn. The lint recovery device recovers lint generated during yarn generation. The management device includes a control device. The control device calculates the generation amount of the lint of the spinning machine based on a characteristic amount that varies according to the amount of the lint recovered and retained by the lint recovery device.

Thus, the generation amount of the lint can be rapidly and accurately calculated.

The management device may have the following configuration. That is, the lint recovery device collects and recovers the lint by a suction air flow formed by a negative pressure. The management device includes a static pressure detection device that detects a static pressure inside the lint recovery device. The control device calculates the lint generation amount based on the static pressure as the characteristic amount detected by the static pressure detection device.

Thus, the generated amount of lint can be calculated by a simple process using the detected value of the static pressure inside the lint recovery device.

The management device may have the following configuration. That is, the lint recovery device collects and recovers the lint by a suction air flow formed by a negative pressure. The management device includes a blower rotation speed acquisition device. The blower rotation speed obtaining device obtains a blower rotation speed of a blower that supplies negative pressure to the lint collecting device. The control device calculates the lint generation amount based on the blower rotational speed obtained by the blower rotational speed obtaining device as the characteristic amount.

Thus, when the blower rotation speed is controlled in accordance with the amount of lint remaining in the lint recovery device, the generated amount of lint can be calculated with a simple process using the blower rotation speed.

In the management device, it is preferable that the control device outputs a lint discharge instruction for discharging the lint stored in the lint recovery device when the static pressure detected by the static pressure detection device is equal to or less than a threshold value.

This can maintain the static pressure in the lint recovery device within a predetermined range. Therefore, in the spinning machine that generates yarn using the suction air flow, degradation of the quality of the generated yarn can be avoided. In addition, the collected fibers can be discharged at an appropriate timing.

In the management device, it is preferable that the control device outputs a lint discharge instruction for discharging the lint stored in the lint recovery device when the blower rotational speed detected by the blower rotational speed acquisition device is equal to or greater than a threshold value.

Accordingly, when the control is performed to increase the rotational speed of the blower as the lint remains in the lint recovery device, the recovered fiber can be discharged at an appropriate timing. Therefore, in the spinning machine that generates yarn using the suction air flow, degradation of the quality of the generated yarn can be avoided.

In the management device, it is preferable that the lint recovery device automatically discharges the remaining lint in response to the lint discharge instruction input from the control device.

This can save effort in discharging the lint. Further, since the lint can be reliably discharged, in the spinning machine that generates the yarn using the suction air flow, degradation of the quality of the generated yarn can be avoided.

In the management device, it is preferable that an input device inputs a reference lint amount as a reference for calculating the lint generation amount.

This allows the amount of lint generated to be easily calculated.

In the management apparatus, the following configuration is preferable. That is, the spinning machine includes a yarn winding device and a yarn splicing device. The yarn winding device winds the yarn produced by the spinning device. The yarn splicing device performs yarn splicing when a yarn breakage occurs during winding of the produced yarn. The control device calculates the amount of generated lint as the total amount of generated lint during yarn generation to generate and wind a yarn having a predetermined yarn throughput. The control device calculates the total amount of the return thread generated during the yarn generation period based on the number of times and/or time of the yarn joining by the joining device during the yarn generation period. The control device calculates a raw material loss amount by adding the calculated total generation amount of the lint and the total generation amount of the return thread.

This allows the raw material loss amount during yarn production to be calculated from the viewpoints of both the lint and the return thread, and therefore the raw material loss amount can be managed more accurately.

In the above-described management device, it is preferable that the control device obtains a ratio of the raw material loss amount to the predetermined yarn production amount.

This makes it possible to easily grasp the degree of the loss of the raw material at the time of yarn production.

The control device is preferably further provided with a display unit for displaying the raw material loss calculated by the control device.

Thus, the production manager and/or the operator can easily check the amount of material loss in the spinning machine.

In the management apparatus, the following configuration is preferable. That is, the control device includes a storage unit that stores the calculated amount of material loss. The control device calculates the raw material loss amount in units of the predetermined yarn production amount of the yarn wound by the spinning machine. The control device calculates a loss amount deviation, which is a deviation between a current loss amount of the raw material and a past loss amount of the raw material. The current material loss amount is the material loss amount calculated during the latest yarn generation period for generating and winding the yarn having the predetermined yarn throughput. The past material loss amount is the material loss amount determined to be abnormal among the material loss amounts calculated during the past yarn production period for producing and winding the yarn of the predetermined yarn production amount stored in the storage unit. When the absolute value of the calculated loss amount deviation is equal to or greater than a threshold value, it is determined that there is an abnormality in the raw material loss amount, and the abnormality is displayed on the display unit.

Thus, the production control can be performed well by monitoring the change in the amount of lost raw material. In addition, the operator can pay attention to abnormality or the like generated in the spinning machine in advance.

In the management device, it is preferable that the past material loss amount stored in the storage unit is updated to the current material loss amount when the absolute value of the loss amount deviation is smaller than the threshold value.

This allows a slow change in the amount of material lost due to a change in the spinning machine with time or the like, and can determine an abnormality in the amount of material lost.

In the management apparatus, the following configuration is preferable. That is, the control device is configured to be capable of communicating with another management device that manages a spinning machine different from the spinning machine. The control device obtains the past material loss amount from the other management device by communication.

This allows the abnormality in the amount of material loss to be well determined by sharing information between a plurality of devices.

In the management apparatus, the following configuration is preferable. That is, the control device includes a storage unit that stores the calculated amount of loss of the raw material in association with the type of yarn to be produced and the spinning conditions. The control device calculates the amount of material required to produce and wind a yarn having a predetermined yarn throughput under the specified yarn type and the spinning conditions, based on the amount of material loss stored in the storage unit.

Thus, the amount of raw material required for producing the yarn can be accurately predicted.

According to a second aspect of the present invention, there is provided a spinning machine with a management device having the following structure. That is, the spinning machine includes the management device and the spinning machine. The spinning machine is managed by the management device. The spinning device of the spinning machine is an air jet spinning device.

Thus, the amount of lint associated with the yarn formation by the air jet can be quickly and accurately calculated.

Drawings

Fig. 1 is a front view showing the overall structure of a spinning frame according to an embodiment of the present invention.

Fig. 2 is a side view showing the spinning unit and the piecing carriage.

Fig. 3A and 3B are schematic views showing the internal structure of the lint recycling bin.

Fig. 4 is a diagram showing a structure of a lint recovery device of a spinning frame according to a modification.

Detailed Description

Next, a spinning machine (spinning machine) 100 according to an embodiment of the present invention will be described with reference to the drawings. Hereinafter, the spinning operation of the spinning machine 100 is referred to as "upstream" and "downstream" as referring to upstream and downstream in the traveling direction of the sliver (raw material) S, the fiber bundle F, and the spun yarn Y when the spun yarn (yarn) Y is wound. When the suction of the lint or the return yarn of the spinning machine 100 is referred to as "upstream" and "downstream", the suction air flow is directed upstream and downstream in the direction of flow.

The spinning machine 100 according to the first embodiment shown in fig. 1 includes: blower box 80, motive box 70, spinning unit 1, and piecing carriage 6. The spinning units 1 are arranged in 1 row and provided in plurality.

A negative pressure source 81, a recovery device 82, and the like are provided in the blower case 80. The negative pressure source 81 generates a negative pressure. The recovery device 82 recovers the lint and the return thread generated by each spinning unit 1.

In the present specification, the lint means a lint in a state where the fiber is not twisted, and is generally generated during the generation of the spun yarn Y. The yarn return means the yarn fragments after spinning is completed and the spun yarn Y is in a state. The lint may be referred to as soft lint and the return thread may be referred to as hard lint.

As shown in fig. 1, the negative pressure source 81 includes a main blower (blower) 81a, a main motor 81b, a sub blower 81c, and a sub motor 81d.

The main blower 81a is connected to a lint recovery device 83 described later provided in the recovery device 82. The main blower 81a is driven by a main motor 81b constituted by an electric motor, and generates a negative pressure (in other words, suction air flow) in the lint recovery device 83.

The sub-blower 81c is connected to a return wire collecting device 84, which will be described later, provided in the collecting device 82. The sub-blower 81c is driven by a sub-motor 81d constituted by an electric motor, and generates a negative pressure (in other words, suction air flow) in the yarn return recovery device 84.

As shown in fig. 1, the recovery device 82 includes a lint recovery device 83 for recovering lint, and a return wire recovery device 84 for recovering return wire. The lint recycling device 83 is constituted by a lint recycling bin 85 and a main suction duct 86. The return wire collecting device 84 is constituted by a return wire collecting tank 87 and a sub suction pipe 88.

The lint recycling bin 85 is provided between the main blower 81a and the main suction duct 86. The lint collection box 85 captures and collects lint flowing in accordance with the suction air flow in the main suction duct 86 by using filters (a main filter 73 and a sub filter 74 described later, shown in fig. 3A and 3B) provided in a passage through which the suction air flow flows.

As shown in fig. 3A and 3B, the lint recovery box 85 is provided with a main passage 71 through which the suction air flows and a bypass passage 72. A main filter 73 is provided in the main passage 71, and a sub-filter 74 is provided in the bypass passage 72. The main filter 73 and the sub-filter 74 each have a wire mesh capable of capturing lint.

In a normal state of the spinning machine 100, as shown in fig. 3A, the suction air flow flows so as to pass through the main passage 71 in the lint recovery box 85. Accordingly, the lint flowing to the lint recovery box 85 with the suction air flow is captured by the main filter 73 disposed in the main passage 71.

The lint recovery box 85 is provided with a plurality of movable members, and the positions thereof can be changed as shown in fig. 3B. The position of the movable member can be switched by an appropriate actuator, not shown. As a result, in the spinning machine 100, the lint accumulated in the lint recovery tank 85 can be discharged while continuing spinning in each spinning unit 1.

In the state of fig. 3B, the suction air flow flows so as to pass through the bypass passage 72 in the lint recovery box 85. In the state of fig. 3B, the bottom of the main passage 71 in the vicinity of the portion where the main filter 73 is provided is opened. Accordingly, the lint captured by the main filter 73 falls down by its own weight, and is discharged to the outside of the lint recovery box 85. In this way, the lint can be automatically discharged from the lint recovery tank 85. The discharged lint is transported to an appropriate place by a conveyor or the like, not shown, and is recovered for reuse, for example.

In the state of fig. 3B, lint flowing into the lint recovery box 85 with the suction air flow is captured by the sub-filter 74 disposed in the bypass passage 72. The lint recovery tank 85 returns from the discharged state of fig. 3B to the normal state of fig. 3A in the near future. The suction air flow does not pass through the bypass passage 72, and therefore the lint captured by the sub-filter 74 falls downward. The lint flows with the suction air flow passing through the main passage 71, and is captured by the main filter 73.

The main suction duct 86 is formed to be elongated in a direction in which the spinning units 1 are arranged, and is provided across the plurality of spinning units 1. The suction air flow generated inside the lint recovery device 83 by the rotation of the main blower 81a is supplied to the draft device 2 and the spinning device 3, which will be described later, provided in each spinning unit 1 via the main suction duct 86.

As shown in fig. 1, the return wire recovery box 87 is provided between the sub-blower 81c and the sub-suction duct 88. The return wire collection box 87 captures and collects return wires flowing in accordance with the suction air flow in the sub suction duct 88 by using a filter, not shown, provided in a passage through which the suction air flow flows.

When discharging the return wire stored in the return wire collection box 87, the operator presses a not-shown return wire discharge button to close the suction air flow passage in the return wire collection box 87. Then, the return wire stored in the return wire collection box 87 is collected by the manual operation of the operator or the like. However, for example, the return wire collection box 87 is constructed substantially in the same manner as the lint collection box 85, and automatic discharge of the return wire can be achieved.

The sub suction duct 88 is formed to be elongated in a direction in which the spinning units 1 are arranged, and is provided across the plurality of spinning units 1. The suction air flow generated inside the yarn return device 84 by the rotation of the sub blower 81c is supplied to the yarn splicing cart 6, a doffing cart, etc., which are not shown, traveling with respect to each spinning unit 1, and suction ports (yarn traps and/or a yarn suction device 28, etc.), which are provided in each spinning unit 1, via the sub suction duct 88.

As shown in fig. 1, the master box 70 is provided with a management device 9. Thus, the spinning machine with the management device is constituted. The management device 9 is configured to be capable of communicating with a unit control unit, not shown, provided in each spinning unit 1. The unit control unit may be provided in units of a predetermined number of spinning units 1, instead of one-to-one arrangement of the spinning units 1. The management device 9 may communicate with a carriage control unit, not shown, provided in each of the yarn splicing carriages 6 and the doffing carriages. The management device 9 can collectively manage information of the spinning units 1, the yarn splicing carriages 6, the doffing carriages, and the like by communicating with the unit control units and the carriage control units.

The management device 9 includes a control device 90, a display (display unit) 91, and an input device 92.

The control device 90 is configured as a well-known computer. The control device 90 includes a CPU (Central Processing Unit) (not shown), a ROM (Read Only Memory), a RAM (Random Access Memory) (random access Memory), an HDD (Hard Disk Drive), and the like.

The display 91 displays various information related to the operation state of each spinning unit 1, yarn quality, and the amount of loss of raw material (total amount of fiber scraps and total amount of returned yarn).

The input device 92 includes a plurality of input keys. The operator can select information displayed on the display 91, set spinning conditions of the spinning machine 100, or the like by operating the input device 92. The spinning conditions of the spinning machine 100 include at least one of the thickness (count, fiber amount) of the spun yarn Y, the running speed of the spun yarn Y, that is, the yarn speed, and the draft conditions of the draft device 2 provided in the spinning unit 1. In the case where the display 91 is a touch panel display, the display 91 and the input device 92 may be integrally formed.

As shown in fig. 1, each spinning unit 1 mainly includes a draft device 2, a spinning device 3, and a yarn winding device 4, which are disposed in this order from the upstream side to the downstream side.

The draft device 2 is provided near the upper end of the frame 10 provided in the spinning machine 100. As shown in fig. 2, the draft device 2 includes four draft roller pairs, namely, a rear roller pair 21, a third roller pair 22, an intermediate roller pair 23, and a front roller pair 24, which are disposed in this order from the upstream side. A flapper belt 25 is provided for each roller in the intermediate roller pair 23.

The draft device 2 stretches (drafts) the sliver S supplied from the sliver housing, not shown, to a predetermined fiber amount (or thickness) by sandwiching the sliver S between rollers included in the draft roller pair and delivering the sliver S, thereby generating a fiber bundle F. The fiber bundle F generated by the draft device 2 is supplied to the spinning device 3.

As shown in fig. 2, a first lint suction and removal device 26 is provided on the immediately downstream side (below the front roller pair 24) of the draft device 2. The first lint suction removing apparatus 26 includes an elongated hollow member connected to the main suction duct 86. Therefore, a suction air flow is generated at the tip end portion and inside of the first lint suction and removal device 26.

Various lint is generated at the periphery of the draft device 2. For example, when the sliver S is drawn in the drawing device 2, the fibers are separated from the fiber bundle F, and the separated fibers become lint. The draft device 2 is provided with a cleaning device, not shown, for cleaning, and as a result of this cleaning, lint is generated. Although described later, lint adhering to the inside of the spinning device 3 is scattered around by the cleaning operation of the spinning device 3. The first lint suction and removal device 26 sucks and removes the lint. The lint sucked by the first lint suction and removal device 26 flows to the lint recovery tank 85 through the main suction duct 86 as the suction air flow in the first lint suction and removal device 26.

The lint generated by the draft device 2 may be removed by other suction removing means in addition to or instead of the first lint suction removing means 26. As another example of the suction removing device, a suction device configured to be opposed to the draft roller pair and suction the outer peripheral surface thereof can be given. The other suction and removal device may be a suction device provided specifically for removing lint generated as a result of the cleaning by the cleaning device.

The spinning device 3 is constituted by, for example, an air jet spinning device. The spinning device 3 includes a spinning nozzle, not shown. The spinning device 3 generates a spinning air flow by injecting compressed air from a spinning nozzle into the spinning device 3. The fiber bundle F supplied from the draft device 2 is twisted by the rotating air flow to generate spun yarn Y.

The structure of the spinning device 3 is well known, and will be briefly described below. Although not shown, the spinning device 3 includes a nozzle block and a hollow guide shaft. The nozzle block includes a fiber guide portion, a spinning nozzle, and a spinning chamber. The hollow guide shaft body is provided with a yarn passage and a second nozzle.

The fiber guide portion provided in the nozzle block guides the drawn fiber bundle F toward the inside (spinning chamber) of the spinning device 3. The spinning device 3 ejects air from a spinning nozzle into the spinning chamber, and applies a spinning air flow to the fiber bundle F in the spinning chamber. By the action of the rotating air flow, the fiber ends of the plurality of fibers constituting the fiber bundle F are reversely rotated.

The hollow guide shaft body is a cylindrical member, and a yarn passage is formed therein. The hollow guide shaft guides the spun yarn Y from the inside of the spinning chamber to the outside of the spinning device 3.

At the start of spinning, the fiber bundle F needs to be introduced from the draft device 2 to the spinning device 3. Accordingly, the spinning device 3 uses the second nozzle to jet air into the yarn path, and thereby generates a rotating air flow flowing from the upstream side toward the downstream side in the yarn path. The direction of the spinning air flow generated in the yarn path is opposite to that of the spinning chamber.

The spinning machine 100 (each spinning unit 1) includes a second lint suction and removal device 27. The second lint suction removing apparatus 27 includes an elongated hollow member. The second lint suction removing device 27 is provided to connect the spinning chamber of the spinning device 3 (or an exhaust passage provided downstream of the spinning chamber) and the main suction duct 86. Accordingly, a suction air flow is generated inside the second lint suction removing device 27.

Some of the fibers in the fiber bundle F supplied to the spinning device 3 are not separated by twisting as the spun yarn Y during the spinning operation. In this way, lint is generated in the spinning chamber. The second lint suction removing device 27 can remove the lint. The lint sucked by the second lint suction and removal device 27 flows to the lint recovery tank 85 through the main suction duct 86 along with the suction air flow in the second lint suction and removal device 27.

After the spinning operation of the spinning device 3 is stopped, or before the spinning operation is restarted (started), the cleaning operation of the spinning device 3 is performed. The cleaning operation will be described. First, the hollow guide shaft of the spinning device 3 is separated from the nozzle block, and the spinning chamber is opened to the outside. Next, in this state, air is ejected from the spinning nozzle for a predetermined time. This allows the lint remaining in the spinning chamber during the previous spinning operation to be blown out and removed from the spinning device 3. However, the above-described cleaning operation is an example, and the cleaning of the lint may be performed by other operations. The lint is sucked and removed by the first lint suction and removal device 26 or the second lint suction and removal device 27.

The yarn winding device 4 includes a rocker arm 41, a winding drum 42, and a traverse guide 43. The rocker arm 41 rotatably supports a bobbin 46 (i.e., package 45) for winding the spun yarn Y. The rocker arm 41 is supported swingably about a support shaft 44. The winding drum 42 rotates in contact with the outer peripheral surface of the bobbin 46 or the package 45, and rotationally drives the package 45 in the winding direction. The yarn winding device 4 reciprocates the traverse guide 43 by a driving mechanism not shown, and drives the winding drum 42 by an electric motor not shown. Thereby, the spun yarn Y is wound around the package 45 while being moved laterally.

In each spinning unit 1, a yarn accumulating device 11 and a yarn monitoring device 12 are provided between the spinning device 3 and the yarn winding device 4.

The yarn accumulating device 11 is provided downstream of the spinning device 3. As shown in fig. 2, the yarn accumulating device 11 includes a yarn accumulating roller 11a and a motor 11b for rotationally driving the yarn accumulating roller 11 a.

The yarn accumulating roller 11a temporarily winds and accumulates a constant amount of spun yarn Y on its outer peripheral surface. The yarn accumulating roller 11a rotates at a predetermined rotation speed while winding the spun yarn Y around the outer peripheral surface, and thereby pulls out the spun yarn Y from the spinning device 3 at a predetermined speed and conveys it downstream.

As shown in fig. 2, a yarn suction device 28 is provided near the yarn accumulating roller 11 a. The yarn suction device 28 is constituted by a hollow tube. The tube is connected to a sub-suction line 88. Therefore, a suction air flow is generated at the front end portion and inside of the yarn suction device 28.

When the spun yarn Y is wound up, if the yarn is broken for any reason, and if the spun yarn Y remains in the yarn accumulating roller 11a, the yarn suction device 28 can suction and remove the yarn end wound around the yarn accumulating roller 11a by the suction air flow generated at the front end and inside thereof. The yarn breakage includes at least one of a phenomenon in which the spun yarn Y is cut by applying excessive tension or the like to the spun yarn Y and a phenomenon in which the spun yarn Y is cut by detecting a yarn defect by the yarn monitoring device 12.

The yarn end (yarn return) sucked and removed by the yarn suction device 28 flows to the yarn return collection tank 87 through the sub-suction duct 88 in accordance with the suction air flow in the yarn suction device 28. The yarn end is removed by the yarn suction device 28, for example, before the joining operation of the joining carriage 6 described later is started.

The yarn monitoring device 12 is provided between the spinning device 3 and the yarn accumulating device 11. The spun yarn Y produced by the spinning device 3 passes through the yarn monitoring device 12 before being wound by the yarn accumulating device 11.

The yarn monitoring device 12 monitors the quality (thickness, etc.) of the traveling spun yarn Y by a light-transmitting sensor, and detects yarn defects (positions where abnormality exists such as thickness of the spun yarn Y, foreign matter, etc.) included in the spun yarn Y. The yarn monitoring device 12 is not limited to the light-transmitting type sensor, and for example, a capacitance type sensor may be used to monitor the spun yarn Y. The yarn monitoring device 12 may be configured to detect the tension of the spun yarn Y as the quality of the spun yarn Y.

When the yarn monitoring device 12 detects a yarn defect, the spun yarn Y is cut. Various methods for cutting the spun yarn Y are available, and for example, the spun yarn Y can be cut by stopping the spinning in the spinning device 3. The spinning unit 1 and the like may be configured to include a cutter, and the spun yarn Y may be cut by the cutter.

As shown in fig. 1, the joint carriage 6 includes a traveling wheel 61, a joint device 62, a suction pipe 63, and a suction nozzle 64.

The running wheel 61 is configured to be rotationally driven by a motor, not shown. By driving the traveling wheels 61, the yarn splicing cart 6 can travel with respect to the plurality of spinning units 1.

The suction pipe 63 is connected to the sub suction pipe 88. The suction pipe 63 generates a suction air flow at the tip thereof, and can suck and catch the spun yarn Y sent out from the spinning device 3. The suction nozzle 64 is connected to the sub suction pipe 88. The suction nozzle 64 generates a suction air flow at the tip thereof, and can thereby suck and catch the spun yarn Y from the package 45 supported by the yarn winding device 4. The suction pipe 63 and the suction nozzle 64 rotate in a state of capturing the spun yarn Y, and thereby guide the spun yarn Y to a position where the yarn can be guided into the yarn splicing device 62.

The yarn joining device 62 joins the spun yarn Y from the spinning device 3 guided by the suction pipe 63 and the spun yarn Y from the package 45 guided by the suction nozzle 64. In the present embodiment, the yarn joining device 62 is a twisting device that uses a rotating air flow to twist yarn ends together. The yarn splicing device 62 is not limited to the above described yarn splicing device, and for example, a yarn splicer, a knotter for mechanically connecting the spun yarn Y, or the like may be employed.

The yarn joining device 62 cuts the spun yarn Y sucked by the suction pipe 63 and the spun yarn Y sucked by the suction nozzle 64 so as to generate yarn ends for joining. The return strands thus produced are sucked and removed by the suction pipe 63 and the suction nozzle 64, respectively. The return yarn sucked and removed by the suction pipe 63 flows to the return yarn recovery tank 87 through the sub suction pipe 88 in accordance with the suction air flow in the suction pipe 63. The return yarn sucked and removed by the suction nozzle 64 flows to the return yarn collection tank 87 through the sub suction duct 88 in accordance with the suction air flow in the suction nozzle 64.

In the present embodiment, the management device 9 of the spinning machine 100 can calculate the amount of material loss generated during the process of forming the spun yarn Y and the package 45 in units of a predetermined yarn throughput. The management device 9 stores the calculated material loss amount in the storage unit 95. The calculated material loss amount is appropriately monitored, and an abnormality is detected when there is an irregular change in the material loss amount.

The calculated amount of material loss is used to determine the amount of sliver S (amount of material) required to produce and wind the spun yarn Y of a predetermined yarn throughput under the spinning conditions designated by the operator via the input device 92. This makes it possible to accurately predict the required amount of raw material, and thus, for example, it is easy to manage the stock of raw material.

The material loss amount can be obtained by adding the total recovery amount of the lint recovered by the lint recovery device 83 and the total recovery amount of the return thread recovered by the return thread recovery device 84 during the period in which the spun yarn Y of a predetermined yarn production amount is produced and wound. At least a large part of the lint generated by the spinning machine 100 is recovered by the lint recovery device 83, and at least a large part of the return thread is recovered by the return thread recovery device 84. Therefore, the recovery amount (total recovery amount) of the lint can be regarded as the generation amount (total generation amount) of the lint in the spinning machine 100. Also, the recovery amount of the return strands (total recovery amount) can be regarded as the generation amount of the return strands (total generation amount).

Next, calculation of the total recovery amount of lint will be described in detail. The predetermined yarn throughput is the amount of spun yarn Y that the spinning machine 100 needs to produce as a whole, and is set in advance by an operator. The predetermined yarn production amount can be expressed by the total weight or the number of packages 45, for example. The predetermined yarn throughput is appropriately set based on the type of the spinning machine 100, the type of the spun yarn Y to be produced, and the like.

In the lint recovery tank 85, as shown in fig. 3A and 3B, the main filter 73 for capturing lint is provided in a passage through which the suction air flow flows. Therefore, the resistance when the suction air flow flows in the main filter 73 increases with the lint stored in the main filter 73. The loss of dynamic pressure due to this resistance is a phenomenon in which the static pressure in the passage upstream of the main filter 73 is reduced due to the bernoulli's theorem.

In this way, the static pressure (characteristic amount) in the lint recovery tank 85 on the upstream side of the main filter 73 decreases according to the increase in the lint recovery amount. The amount of lint stored in the lint recovery tank 85 can be obtained by using this relationship.

The spinning machine 100 of the present embodiment is provided with a first static pressure detecting device (static pressure detecting device) 93. As shown in fig. 3A and 3B, the first static pressure detection device 93 is provided in, for example, the bypass passage 72 formed in the lint recovery box 85. The first static pressure detection device 93 detects the static pressure in the lint recovery tank 85 on the upstream side of the main filter 73 of the main passage 71.

The first static pressure detection device 93 is preferably provided on the downstream side of the sub-filter 74 in the bypass passage 72 shown in fig. 3A and 3B. Thus, the first static pressure detection device 93 can accurately detect the static pressure in the lint recovery tank 85 without being affected by lint and the like.

The first static pressure detection device 93 is constituted by a micro pressure difference sensor, for example. The first static pressure detection device 93 outputs the detected static pressure in the lint recovery tank 85 to the control device 90.

The control device 90 stores the static pressure detected by the first static pressure detection device 93 using the storage unit 95 constituted by the above ROM, RAM, HDD. The storage unit 95 stores static pressure-lint recovery amount data indicating a correspondence between the static pressure in the lint recovery device 83 and the recovery amount of lint recovered by the lint recovery tank 85.

The relationship between the static pressure and the collection amount of the lint varies depending on, for example, the type of spun yarn Y produced by the spinning machine 100, the set spinning conditions, and the like. In consideration of this fact, the above static pressure-lint recovery amount data is stored in association with the kind of spun yarn Y and spinning conditions. The static pressure-lint recovery amount data may be stored in the storage unit 95 as a table, or may be stored in the storage unit 95 as a calculated parameter.

Thus, the control device 90 can easily calculate the amount of lint stored in the lint recovery tank 85 based on the static pressure detected by the first static pressure detection device 93.

The control device 90 monitors the static pressure in the lint recovery device 83 using the first static pressure detection device 93. Specifically, when the static pressure detected by the first static pressure detection device 93 is equal to or lower than a predetermined threshold value, the control device 90 outputs a lint discharge instruction to the lint recovery device 83 so as to perform automatic discharge of the lint in the lint recovery tank 85. The lint recovery device 83 performs the above-described automatic discharge in accordance with the lint discharge instruction from the control device 90.

The control device 90 calculates the amount of lint discharged from the lint recovery device 83 as the lint discharge amount Q every time the automatic discharge is performed. The lint discharge amount Q corresponds to the amount of lint recovered by the lint recovery box 85 immediately before the automatic discharge. Therefore, the lint discharge amount Q corresponds to the amount of lint generated during the period between two adjacent automatic discharges. The lint discharge amount Q is calculated based on the static pressure detected by the first static pressure detecting device 93 immediately before the automatic discharge, with reference to the static pressure-lint recovery amount data. The calculated lint discharge amount Q is stored in the storage unit 95.

The production amount of spun yarn Y of the spinning machine 100 takes a certain amount of time to reach a predetermined yarn production amount. Hereinafter, the yarn generation period corresponding to the predetermined yarn production amount will be referred to as a specific period P. Even when the type of spun yarn Y and the spinning conditions are the same, the specific period P becomes longer or shorter due to an uncertainty (for example, the number of times the yarn defect is actually detected by the yarn monitoring device 12). The specific period P is not limited to the above, and may be set to one shift time unit, for example.

In the specific period P, the lint recovery device 83 may automatically discharge lint a plurality of times. In this case, the control device 90 according to the present embodiment calculates the lint discharge amount Q each time the automatic discharging of the lint is performed, and calculates the sum of the calculated plurality of lint discharge amounts Q. This allows the total recovery amount of lint recovered by the lint recovery device 83 in the specific period P to be calculated. The total recovery amount of the lint corresponds to the generation amount of the lint generated during the specific period P.

The end of the specific period P is almost inconsistent with the timing of automatic discharging of lint in the lint recovery device 83. In consideration of this fact, the control device 90 calculates the amount of lint remaining in the lint recovery tank 85 based on the static pressure detected by the first static pressure detection device 93 at the time when the specific period P ends. In this case, the control device 90 calculates the total collection amount of the lint by adding the calculated amount of the lint to the sum of the lint discharge amount Q calculated before the specific period P.

The automatic discharge of the lint is forcibly performed at the time when the specific period P ends, whereby the total recovery amount of the next specific period P can be simply and accurately calculated. At any time during the specific period P, the operator may clean the lint recovery device 83. In this case, the control device 90 calculates the amount of lint remaining in the lint recovery tank 85 based on the static pressure detected by the first static pressure detection device 93 immediately before cleaning, and uses the calculation result to calculate the total recovery amount of lint in the specific period P.

When the specific period P is interrupted for any reason (for example, maintenance of a machine or the like), and the operator cleans the lint recovery device 83, or when the specific period P is reset by the operator's operation, the control device 90 may start a new series of calculations by temporarily resetting the previous calculation processing in response to the restart or start of the specific period P.

Next, calculation of the total recovery amount of the yarn back in the spinning frame 100 according to the present embodiment will be described in detail. In the present embodiment, the control device 90 of the management device 9 calculates the total recovery amount of yarn back by adding the calculated joint yarn back amount and the doffing yarn back amount in the specific period P.

The amount of the joint thread-back is calculated as follows, for example. That is, the control device 90 counts the number of splices performed by the splice carriage 6 in the specific period P, and multiplies the number of splices obtained by the unit amount of splice back generated by one-time splice, thereby calculating the amount of splice back. The unit joint thread-back amount is a parameter set in advance in the control device 90. The unit joint thread-back amount can be obtained by, for example, actually measuring the joint thread-back amount actually generated in the test operation or the actual operation, and obtaining the average value of the measured values.

The amount of unit joint thread back is not limited to a constant value. For example, the number of times of the yarn splicing for each of the long yarn defect and the short yarn defect may be counted separately, the number of times of the yarn splicing may be multiplied by the unit yarn return amount in the case of the long yarn defect and the unit yarn return amount in the case of the short yarn defect, and the result of the multiplication may be added to obtain the yarn return amount.

The doffing yarn return amount is calculated by multiplying the number of times of doffing operations calculated by the predetermined prescribed yarn production amount, yarn type, yarn thickness, shape of the package 45, etc. by winding in the specific period P, and the unit doffing yarn return amount generated in one doffing operation calculated based on the yarn running speed, etc.

As in the calculation of the total collection amount of the lint, when the specific period P is interrupted for any reason (for example, maintenance of the machine) or when the specific period P is reset by an operation of the operator, the control device 90 may start a new series of calculations by temporarily resetting the previous calculation processing in response to the restart or start of the specific period P.

However, the present embodiment is not limited to this example, and the doffing yarn return amount may be calculated by counting the number of times the doffing operation is actually performed in the specific period P, for example, as in the calculation of the joint yarn return amount.

The splicing operation and doffing operation are not necessarily successful, and sometimes an error occurs. If an error occurs, the amount of thread back increases accordingly. In view of this fact, the yarn joining and doffing amounts calculated as described above may be corrected based on the number of yarn joining errors and doffing errors, respectively.

In the spinning machine 100 of the present embodiment, the control device 90 calculates the raw material loss amount by adding the total recovery amount (total production amount) of the lint calculated as described above to the total recovery amount (total production amount) of the return yarn. The amount of material loss calculated by the control device 90 is stored in the storage unit 95. The storage unit 95 stores the obtained material loss amount in association with the type of spun yarn Y generated in the specific period P corresponding to the material loss amount, the set spinning conditions, and the like.

The material loss rate can be obtained by dividing the material loss by a predetermined yarn throughput, which is the total amount of spun yarn Y wound in a specific period P. The control device 90 calculates the material loss rate and stores the material loss rate in the storage unit 95. The material loss rate is stored in the storage unit 95 in association with the type of spun yarn Y generated in the specific period P and the set spinning conditions.

In the spinning frame 100 of the present embodiment, the control device 90 determines whether or not an abnormality (abnormality related to the loss of raw material) has occurred in the spinning frame 100 based on the calculated amount of loss of raw material in the specific period P. The control device 90 may detect an abnormality of the sliver S itself as a raw material as an abnormality related to the loss of the raw material.

Specifically, the controller 90 calculates the amount of material loss in the specific period P as described above after winding the spun yarn Y having a predetermined yarn throughput. The control device 90 calculates a current material loss amount, which is a material loss amount calculated for the latest specific period P, and a loss amount deviation, which is a deviation of a past material loss amount, which is a material loss amount calculated for the past specific period P under the same spinning conditions stored in the storage unit 95.

When the absolute value of the loss amount deviation is equal to or greater than the preset threshold value, that is, when the material loss amount in the specific period P at this time diverges to a predetermined degree or more from the material loss amount in the specific period P in the past, the control device 90 determines that an abnormality has occurred in the material loss amount, and notifies the operator of the abnormality. The method of notifying the operator of the abnormality is various, and for example, a warning may be displayed on the display 91.

When the absolute value of the loss amount deviation is smaller than the threshold, the control device 90 updates the past loss amount of the raw material stored in the storage unit 95 in accordance with the same spinning condition and the same type of spun yarn Y, with the loss amount of the raw material in the specific period P obtained this time. This allows a slow change in the material loss amount due to aging of the spinning machine 100 or the like, and detects an abnormality in the material loss amount.

In the spinning machine 100 of the present embodiment, when the past material loss amount is not stored in the storage unit 95, the control device 90 uses the past material loss amount calculated and stored similarly by another management device that manages another spinning machine (another spinning machine) as another spinning machine, and performs the above-described determination. The control device 90 is configured to be capable of communicating with other management devices, and can acquire the past material loss amount by known communication. Thus, even when spinning the spun yarn Y of an unknown type, for example, it is possible to normally perform abnormality determination concerning the amount of material loss by acquiring information from another management device.

As described above, the management device 9 according to the present embodiment is a management device for the spinning machine 100 including the spinning device 3 and the lint recovery device 83. The spinning device 3 generates spun yarn Y. The lint recovery device 83 recovers lint generated during the generation of the spun yarn Y. The management device 9 includes a control device 90. The control device 90 calculates the amount of lint generated by the spinning machine 100 based on a characteristic amount (for example, a static pressure inside the lint recovery device 83) that varies according to the amount of lint recovered and retained by the lint recovery device 83.

Thus, the generation amount of the lint can be quickly and accurately calculated.

In the present embodiment, the lint recovery device 83 collects and recovers lint via the suction air flow generated by the negative pressure. The management device 9 includes a first static pressure detection device 93. The first static pressure detecting device 93 detects the static pressure inside the lint recycling device 83. The control device 90 calculates the generation amount of lint based on the static pressure, which is the feature amount detected by the first static pressure detection device 93.

This allows the amount of lint generated to be calculated by a simple process using the detected value of the static pressure inside the lint recovery device 83.

In the present embodiment, the control device 90 outputs a lint discharge instruction to discharge lint stored in the lint recovery device 83 when the static pressure detected by the first static pressure detection device 93 is equal to or less than a threshold value.

This can maintain the static pressure in the lint recovery device 83 within a proper range. Therefore, in the spinning machine 100 that generates the spun yarn Y using the suction air flow, the quality of the generated spun yarn Y can be prevented from being degraded. In addition, the collected lint can be discharged at an appropriate timing.

In the present embodiment, the lint recovery device 83 automatically discharges the remaining lint in response to the lint discharge instruction input from the control device 90.

This can save effort in discharging the lint. Further, since the lint can be reliably discharged, in the spinning machine 100 that generates the spun yarn Y using the suction air flow, degradation in quality of the generated spun yarn Y can be avoided.

The spinning machine 100 managed by the management device 9 of the present embodiment includes the yarn winding device 4 and the yarn splicing device 62. The yarn winding device 4 winds the spun yarn Y generated by the spinning device 3. The yarn splicing device 62 performs yarn splicing when a yarn breakage occurs during winding of the produced spun yarn Y. The control device 90 calculates the amount of lint generated as the total amount of lint generated during a specific period P in which the spun yarn Y of a predetermined yarn production amount is generated and wound. The control device 90 calculates the total amount of the return wire generated during the specific period P based on the number of times and/or the time of the joining by the joining device 62 during the specific period P. The control device 90 calculates the amount of raw material loss by adding the calculated total amount of lint and the total amount of return thread.

This allows the calculation of the amount of material lost in the specific period P from the viewpoints of both the lint and the return, and thus the amount of material lost can be managed more accurately.

In the present embodiment, the control device 90 obtains a ratio of the amount of material loss with respect to a predetermined yarn throughput as a material loss rate.

This makes it possible to easily grasp the degree of the loss of the raw material during the production of the spun yarn Y.

The management device 9 of the present embodiment includes a display 91. The display 91 displays the amount of material loss calculated by the control device 90.

Thus, the production manager and/or the operator can easily check the amount of material loss in the spinning machine 100.

In the present embodiment, the control device 90 includes a storage unit 95. The storage unit 95 stores the amount of material loss calculated by the control device 90. The control device 90 calculates the amount of material loss in units of a predetermined yarn throughput of the spun yarn Y wound by the spinning machine 100. The control device 90 calculates a current material loss amount and a loss amount deviation, which is a deviation from a past material loss amount. The current material loss amount is calculated for the latest specific period P in which the spun yarn Y of a predetermined yarn production amount is produced and wound. The past material loss amount is a material loss amount determined to be free from abnormality among the material loss amounts calculated for the past specific period P in which the spun yarn Y of a predetermined yarn throughput is generated and wound, and stored in the storage unit 95. When the absolute value of the calculated loss amount deviation is equal to or greater than the threshold value, the control device 90 determines that an abnormality has occurred in the loss amount of the raw material, and displays the abnormality on the display 91.

Thus, the production control can be performed well by monitoring the change in the amount of lost raw material. In addition, the operator can be made aware of an abnormality or the like generated in the spinning machine 100 in advance.

In the management device 9 of the present embodiment, when the absolute value of the loss amount deviation is smaller than the threshold value, the past material loss amount stored in the storage unit 95 is updated to the current material loss amount.

This allows a slow change in the material loss amount due to a change in the spinning frame 100 with respect to time or the like, and can determine an abnormality in the material loss amount.

In the present embodiment, the control device 90 can communicate with another management device that manages a spinning machine different from the spinning machine 100. The control device 90 obtains the past material loss amount from the other management device by communication.

This enables the abnormality of the material loss amount to be well determined by sharing information.

In the present embodiment, the control device 90 includes a storage unit 95. The storage unit 95 stores the calculated amount of loss of raw material in association with the type of yarn to be produced and the spinning conditions. The control device 90 calculates the amount of raw material required to produce and wind the spun yarn Y having a predetermined yarn throughput under the specified yarn type and spinning conditions, based on the amount of raw material loss stored in the storage unit 95.

This makes it possible to accurately predict the amount of raw material required for producing the spun yarn Y.

Next, a second embodiment will be described. In the description of the present embodiment, the same reference numerals are given to the same or similar components as those of the above embodiment in the drawings, and the description thereof may be omitted.

In the spinning machine 100 of the present embodiment, the management device 9 calculates the total collection amount of lint based on the reference lint amount set in advance and the number of times the lint collection box 85 automatically discharges the lint in the specific period P.

The reference lint amount is an amount of lint that is automatically discharged from the lint recovery tank 85 once. The reference lint amount can be obtained as an average value by dividing the total amount of lint actually discharged during the test run or the actual run by the number of times of automatic discharge, for example. The reference lint amount is input to the management device 9 by the operator operating the input device 92.

The control device 90 of the management device 9 counts the number of times of automatic discharging of lint by the lint recovery tank 85 during the specific period P. The control device 90 multiplies the obtained number of times of automatic discharge by the reference lint amount, thereby calculating the total recovery amount (in other words, the total production amount) of lint. Thus, the total generation amount of the lint can be calculated simply.

As described above, the management device 9 of the present embodiment includes the input device 92 for inputting the reference lint amount which is the reference for calculating the generation amount of lint.

Thus, the total generation amount of the lint can be calculated simply.

Next, a modification of the above embodiment will be described. Fig. 4 is a diagram showing a structure of the lint recovery device 83 of the spinning frame 100 according to the modification. In the description of the present modification, the same or similar components as those of the above-described embodiment are often denoted by the same reference numerals in the drawings, and the description thereof will be omitted.

In the spinning machine 100 according to the present modification, the rotation speed of the main blower 81a is controlled so that the static pressure in the lint recovery device 83 is always maintained within a predetermined range. Specifically, if the static pressure detected by the first static pressure detection device 93 is lower than the lower limit value of the above range, the control device 90 increases the rotation speed of the main blower 81 a. Hereinafter, the rotation speed of the main blower 81a may be simply referred to as the blower rotation speed. The greater the amount of lint remaining in the lint recovery tank 85, the faster the blower speed.

In the management device 9 of the present embodiment, the storage unit 95 stores rotational speed-lint recovery amount data indicating a correspondence relationship between the rotational speed of the main blower 81a and the amount of lint recovered by the lint recovery box 85.

As shown in fig. 4, the spinning machine 100 of the present embodiment is provided with a blower rotation speed sensor (blower rotation speed acquisition device) 94 that detects the rotation speed of the main blower 81 a. The blower rotation speed sensor 94 is constituted by, for example, a photoelectric rotation sensor, a magnetic rotation sensor, or the like. The blower rotation speed sensor 94 outputs the detected rotation speed of the main blower 81a to the control device 90.

The management device 9 according to the present embodiment calculates the amount of lint based on the rotational speed (characteristic amount) of the main blower 81a detected by the blower rotational speed sensor 94, instead of the static pressure according to the first embodiment. This allows the amount of lint stored in the lint recovery box 85 to be calculated with high accuracy.

The management device 9 of the present embodiment monitors the static pressure in the lint recovery device 83 using the first static pressure detection device 93. The management device 9 also monitors the collection amount of lint stored in the lint collection box 85 using the blower rotation speed sensor 94.

When the rotational speed of the main blower 81a detected by the blower rotational speed sensor 94 is equal to or greater than a predetermined threshold value, the control device 90 outputs a lint discharge instruction to the lint recovery device 83. The control device 90 calculates the lint discharge amount Q based on the rotation speed of the main blower 81a detected immediately before the automatic lint discharge is started.

Instead of detecting the blower rotational speed by a sensor, the control device 90 can acquire the blower rotational speed based on a rotational speed command value output to the main motor 81 b. In this case, the control device 90 actually functions as a blower rotational speed acquisition device.

As described above, the management device 9 of the present embodiment includes the blower rotation speed sensor 94. The blower rotation speed sensor 94 obtains the rotation speed of the main blower 81a that supplies negative pressure to the lint recovery device 83. The control device 90 calculates the amount of lint generated based on the rotational speed obtained by the blower rotational speed sensor 94.

Thus, when the blower rotation speed is controlled in accordance with the amount of lint remaining in the lint recovery device 83, the generated amount of lint can be calculated with a simple process using the blower rotation speed.

In the management device 9 of the present embodiment, the control device 90 outputs a lint discharge instruction to discharge lint collected by the lint collection device 83 when the rotational speed detected by the blower rotational speed sensor 94 exceeds a threshold value.

In this way, when the control is performed to increase the blower rotation speed as the lint remains in the lint recovery device 83, the collected lint can be discharged at an appropriate timing. Therefore, in the spinning machine 100 that generates the spun yarn Y using the suction air flow, the quality of the generated spun yarn Y can be prevented from being degraded.

While the preferred embodiments and modifications of the present invention have been described above, the above-described configuration can be changed as follows. The above-described embodiments and modifications, and the following modifications can be appropriately combined.

The first static pressure detection device 93 may be provided in the main suction pipe 86 or in a passage on the downstream side of the main filter 73.

The control device 90 may not calculate the lint discharge amount Q every time 1 automatic removal of lint is performed. For example, after winding the yarn having a predetermined yarn production amount (i.e., after the lapse of the specific period P), the control device 90 calculates the lint discharge amount Q in the specific period P in a lump based on the transition of the rise and/or fall of the static pressure in the specific period P.

The total recovery amount of the return strands may be calculated in the same manner as the total recovery amount of the lint. Specifically, a second static pressure detection device, not shown, is provided in the return wire collection tank 87 on the upstream side of a filter, not shown, that captures return wires, and in the vicinity of the filter. The amount of collected wire can be calculated based on the detected static pressure in the wire collection tank 87 every time the wire discharge operation is performed in the specific period P, and the total amount of collected wire can be obtained by adding the respective amounts of collected wire at the end of the specific period P.

The control device 90 may be configured to be capable of transmitting the raw material loss amount calculated for each specific period P to a separately provided management system, not shown. In this case, the management system can use the amount of loss of each raw material received from the control device 90 for performance analysis of the spinning machine 100, judgment of maintenance timing, and the like.

The control device 90 may store the raw material loss amount calculated for each specific period P a plurality of times in the past. In this case, the loss amount deviation can be obtained as a deviation of the current raw material loss amount from an average value of the past raw material loss amounts of a plurality of times, for example.

When an abnormality in the amount of loss of raw material is detected, the control device 90 may determine whether there is an abnormality in the total amount of production of lint, an abnormality in the total amount of production of return wire, or an abnormality in both, and display the determination result on the display 91. In this case, the determination of the cause of the abnormality becomes easy.

Not all the lint generated by the spinning frame 100 is recovered by the lint recovery device 83. Not all of the yarn return generated by the spinning frame 100 is recovered by the yarn return recovery device 84. In consideration of this fact, the control device 90 may calculate the recovery amount of the lint and the return wire as the generated amount without directly using the recovery amount, and may perform the correction in consideration of the recovery rate.

Each spinning unit 1 may be provided with each device so as to wind the spun yarn Y supplied from the lower side on the upper side in the height direction.

Instead of the yarn splicing cart 6, each spinning unit 1 may be provided with a yarn splicing device 62, a suction tube 63, and a suction nozzle 64.

Instead of the above-described structure in which the yarn Y is spliced by lapping or knotting, the yarn unit 1 may reversely convey the spun yarn Y from the package 45 to the yarn spinning device 3, and then restart the drafting by the drafting device 2 and the spinning by the yarn spinning device 3, thereby bringing the cut spun yarn Y into a continuous state (splice). In this case, for example, the yarn end of the spun yarn Y may be cut before the spun yarn Y is reversely fed to the spinning device 3, and the cut yarn end corresponds to the return yarn.

The number of draft rollers in the draft device 2 is not limited to four, but may be changed to two, three, or five or more.

The management device 9 may calculate the amount of accumulated yarn back based on the accumulated time for which the yarn accumulating roller 11a is rotated by the motor 11b in order to remove the yarn end of the yarn accumulating roller 11a, and may add the calculated amount to the total amount of accumulated yarn back.

The management device 9 of the spinning machine 100 may be configured to control only the recovery device 82, and calculate the amount of generation of the lint and/or the return thread by a management device (for example, a mobile terminal or a computer provided in a fiber shop where the spinning machine 100 is disposed) provided separately from the spinning machine 100. In this case, the management device receives necessary data from the management device 9 of the spinning machine 100.

The spinning unit 1 may be configured to draw out the spun yarn Y from the spinning device 3 by a known pair of conveying rollers instead of the yarn accumulating roller 11 a. In this case, at least one of the yarn accumulating device 11, the air gap pipe using the suction air flow, and the mechanical compensator may be disposed downstream of the pair of conveying rollers.

The spinning machine 100 may be a free-end spinning machine instead of an air jet spinning machine.

Claims

1. A control device for a spinning machine comprising a spinning device for producing yarn and a lint recovery device for recovering lint generated during the production of yarn, characterized by comprising a control device for calculating the amount of generated lint of the spinning machine based on a characteristic amount that varies according to the amount of lint recovered and retained by the lint recovery device,

the lint recycling device collects and recycles the lint by a suction air flow formed by negative pressure,

the management device includes at least one of a static pressure detection device that detects a static pressure inside the lint recovery device and a blower rotation speed acquisition device that acquires a blower rotation speed of a blower that supplies negative pressure to the lint recovery device,

The feature value is the static pressure detected by the static pressure detecting device or the blower rotational speed acquired by the blower rotational speed acquiring device.

2. The device according to claim 1, wherein,

the control device outputs a lint discharge instruction for discharging the lint stored in the lint recovery device when the static pressure detected by the static pressure detection device is equal to or less than a threshold value.

3. The device according to claim 1, wherein,

the control device outputs a lint discharge instruction for discharging the lint stored in the lint recovery device when the blower rotational speed detected by the blower rotational speed acquisition device is equal to or greater than a threshold value.

4. The management device according to claim 2, wherein,

the lint recovery device automatically discharges the remaining lint according to the lint discharge instruction inputted from the control device.

5. A management device according to claim 3, wherein,

6. The management apparatus according to any one of claims 1 to 5, comprising:

and an input device for inputting a reference lint amount as a reference for calculating the lint generation amount.

7. The management device according to any one of claims 1 to 5, wherein,

the spinning machine includes:

a yarn winding device for winding the yarn produced by the spinning device; and

a yarn joining device for joining the yarns when the yarns are broken during winding of the yarns,

the control device

The above-mentioned generation amount of the filings is calculated as the total generation amount of the filings during the yarn generation period in which the yarn of the prescribed yarn production amount is generated and wound,

based on the number of times and/or time of the yarn joining by the joining device during the yarn producing period, the total production amount of the return yarn during the yarn producing period is calculated,

the calculated total generation amount of the lint and the total generation amount of the return thread are added together to calculate a raw material loss amount.

8. The device according to claim 6, wherein,

the spinning machine includes:

a yarn winding device for winding the yarn produced by the spinning device; and

the control device

9. The control device according to claim 7, wherein the control device obtains a ratio of the amount of the raw material loss to the predetermined yarn production amount.

10. The device according to claim 8, wherein,

the control device obtains a ratio of the raw material loss amount to the predetermined yarn production amount.

11. The management apparatus according to claim 7, comprising:

and a display unit for displaying the raw material loss calculated by the control device.

12. The management apparatus according to any one of claims 8 to 10, comprising:

13. The device according to claim 11, wherein,

the control device is provided with a storage unit for storing the calculated raw material loss amount,

the control device calculates the raw material loss amount in units of the predetermined yarn production amount of the yarn wound by the spinning machine,

the control device calculates a loss amount deviation which is a deviation between a current loss amount of the raw material and a past loss amount of the raw material,

the current material loss amount is the material loss amount calculated during the latest yarn generation period for generating and winding the yarn of the prescribed yarn production amount,

the past material loss amount is the material loss amount determined to be abnormal among the material loss amounts calculated during the past yarn production period for producing and winding the yarn of the predetermined yarn production amount stored in the storage unit,

when the absolute value of the calculated loss amount deviation is equal to or greater than a threshold value, it is determined that there is an abnormality in the raw material loss amount, and the abnormality is displayed on the display unit.

14. The device according to claim 12, wherein,

15. The management device according to claim 13, wherein,

when the absolute value of the loss amount deviation is smaller than the threshold value, the past material loss amount stored in the storage unit is updated to the current material loss amount.

16. The management device of claim 14, wherein,

17. The device according to any one of claim 13 to 16, wherein,

the control device is configured to be capable of communicating with another management device for managing a spinning machine different from the spinning machine,

the control device obtains the past material loss amount from the other management device by communication.

18. The management device according to any one of claims 9 to 11, 13 to 16, wherein,

the control device comprises a storage unit for storing the calculated raw material loss amount and the type of yarn and spinning conditions,

the control device calculates the amount of material required to produce and wind a yarn having a predetermined yarn throughput under the specified yarn type and the spinning conditions, based on the amount of material loss stored in the storage unit.

19. The device according to claim 12, wherein,

20. The management device of claim 17, wherein,

21. A spinning machine with a management device is characterized by comprising:

the management device of any one of claims 1 to 20; and

the spinning machine managed by the management device,

the spinning device of the spinning machine is an air jet spinning device.