KR102393871B1 - A setup method of top tension devices on a flat knitting machine and a setup system - Google Patents

Abstract

(Problem) The present invention automates the setting of the tension with respect to a top tension device capable of electrically adjusting the tension applied to the yarn.
(Configuration) An adjustment member capable of electrically setting the tension applied to the yarn is provided, and a top tension device installed in the flat knitting machine is set. Measure the input value to the adjusting member for applying the desired tension to the yarn for each yarn, and correct the input value according to the factors of the feed threading route from the top tension device to the yarn carrier, and set the set value as that of the flat knitting machine. Applied to the adjustment member from the controller.

Description

Setting method and setting system of top tension device of flat knitting machine

The present invention relates to setting of a top tension device in a flat knitting machine.

In a flat knitting machine, a plurality of top tension devices (top tension devices) are installed on a mounting table at the top of a needle bed, and tension is applied to yarn from a yarn package to give side tension. (side tension), the positive yarn feeding device (positive yarn feeding device), or the like, or directly to the carrier (carrier) yarn is supplied (refer to Patent Document 1). For example, about 20 top tension devices are installed on one flat knitting machine, and in a knitting factory having a large number of flat knitting machines, the number of top tension devices is considerable.

It is conceivable to install an electrically controllable disk, roller, etc. in the top tension device to apply tension to the yarn. For example, if the yarn is clamped by a disk and the pressure applied from the disk to the yarn is controlled, the tension can be controlled. Even if the roller is driven by a motor and the torque applied to the roller is controlled, the tension can be controlled. However, even if the pressure of the disk, the torque of the rollers, etc. are constant, the tension applied when the seal is changed also changes.

The tension to be applied by the top tension device is changed by the rapid yarn path to the carrier of the yarn. And the sudden death path is different for each top tension device. Here, it is very difficult to set the tension one by one for a plurality of top tensioning devices.

: Japanese Patent Laid-Open No. Hei 08-003844

An object of the present invention is to automate the setting of the tension with respect to a top tension device capable of electrically adjusting the tension applied to the yarn.

The present invention provides a method for setting a top tensioning device provided in a flat knitting machine and having an adjusting member capable of electrically adjusting the tension applied to the yarn, the method comprising:

A measuring step of measuring the input value to the adjustment member for applying the desired tension to the yarn for each yarn;

A setting step of converting the input value into a set value for the adjusting member by correcting the input value according to the factors of the feeding route from the top tension device to the yarn carrier, and applying the converted set value from the controller of the flat knitting machine to the adjusting member

characterized by running.

The present invention provides a system for setting a top tensioning device provided in a flat knitting machine and having an adjusting member for adjusting a tension applied to a yarn by electrical input, the system comprising:

A measurement means for measuring an input value to an adjustment member for applying a desired tension to a yarn for each yarn and a controller of the flat knitting machine are provided, wherein the controller of the flat knitting machine is configured to: , converted into a set value for the adjusting member by correcting the input value, and applying the set value to the adjusting member.

In the present invention, with respect to the top tension device capable of electrically adjusting the tension applied to the yarn, the setting of the tension can be automatically changed when the yarn to be used is changed. The present invention is particularly effective when there are many top tension devices. In addition, although the same type of yarn may be used as the same yarn, even the same type of yarn may have different properties depending on temperature, humidity, production lot, etc. In this case, if the temperature, humidity, manufacturing lot, etc. are changed, it is preferable to re-measure the input value to the adjusting member.

Preferably, in the setting step, the yarn is fed from the top tension device and the type of yarn feeding destination on the upstream side of the carrier, the number of insulators (yarn guides) through which the yarn passes in the feeding route, and the feeding route. The input value is corrected according to the factors of the feeding route, such as the bending method of the yarn in . The tension to be applied by the top tension device is changed by the rapid firing route. However, by doing as described above, it is possible to convert the input value into a set value by correcting the input value according to the factors of the rapid fire route.

Preferably, the input value is measured for each of a plurality of feeding speeds, and a speed correction step of correcting a set value during knitting according to the yarn feeding speed from the top tension device is performed by the controller of the flat knitting machine. In this way, since it is possible to apply an appropriate tension according to the yarn feeding speed, it is possible to prevent unevenness in the dimensions of the knitted fabric to be knitted.

Preferably, in the measuring step, the thread is supplied to the lead-in member through the adjusting member and the tension sensor, tension is applied to the thread by the adjusting member, the thread is drawn by the lead-in member, and the measurement is performed by the tension sensor. Measure the input value to the adjusting member when the tension of the thread becomes the desired value. Here, by using the one of this configuration as the dedicated measuring machine, since the input value can be measured without using the flat knitting machine, there is no need to stop the knitting machine during measurement. For this reason, the knitted fabric can be knitted more efficiently. If a tension sensor is installed between the top tension device, side tension, active yarn feeder, etc., without using a dedicated measuring device, and a pull-in member is installed on the downstream side of the carrier of the flat knitting machine for measurement, there is no actual knitting on the flat knitting machine. It is possible to measure the input value to the adjustment member.

In the embodiment, the correction amount for each element of the fire supply route is calculated and added, but the correction value for the entire fire supply route may be measured. This correction is also a correction according to the factors of the rapid fire route. For example, the thread pulling-in speed and the tension in the vicinity of the exit of the top tension device are made constant, the required input value to the adjustment member is measured for each feed threading route, and the difference with the input value from the top tension device as a standard is measured. It is stored as a correction value for each rapid fire route. Even if the thread changes, the correction value for each rapid fire route can be used without changing, for example.
The present invention provides a method for setting a top tensioning device provided on a flat knitting machine and having an adjusting member capable of electrically adjusting the tension applied to the yarn, the method comprising:
Measurement step of measuring and storing the input value to the adjustment member for applying the desired tension to the yarn for each yarn - The input value to the adjustment member is determined by the element in contact with the yarn in the feeding route from the top tension device to the carrier. It is a value that does not take into account the change in tension- and,
a step of memorizing an element with which the yarn comes into contact in the feeding route from the top tension device to the carrier;
In order to correct the tension changed by the factors of the feed firing route different for each top tension device, according to the factors of the feed firing route, the input value to the adjusting member is corrected to convert it into a set value for the adjusting member, and the adjusting member A setting step of applying the set value for the flat knitting machine from the controller to the adjusting member
characterized by running.
The present invention provides a system for setting a top tensioning device provided in a flat knitting machine and provided with an adjusting member for adjusting the tension applied to the yarn by electrical input, the system comprising:
A measuring means for measuring an input value to an adjustment member for applying a desired tension to the yarn for each yarn and a controller of the flat knitting machine are provided, wherein the input value to the adjustment member is determined in the thread feeding route from the top tension device to the carrier. This value does not take into account the change in tension caused by the contacting element-,
The flat knitting machine's controller is
It is configured to store the element in contact with the yarn in the feeding route from the top tension device to the carrier,
In order to correct the tension changed by the factors of the feed firing route different for each top tension device, according to the factors of the feed firing route, the input value to the adjusting member is corrected to convert it into a set value for the adjusting member, and the adjusting member that is configured to apply the set value for
characterized.

Fig. 1 is a block diagram of a top tension device used in the embodiment.
Fig. 2 is a schematic diagram of a measurement step in Examples.
3 : is a figure which shows typically the table of the input values of the top tension device in an Example.
Fig. 4 is a diagram schematically showing the setting of the top tension device in the flat knitting machine according to the embodiment.
Fig. 5 is a flowchart showing the setting algorithm of the top tension device in the embodiment.

Hereinafter, optimal examples for carrying out the invention are shown.

(Example)

1 to 5 show an embodiment. Fig. 1 is a view showing an example of a top tension device 2, and Fig. 4 is a pair of pedestals, which is applied by pinching a yarn 10 to apply pressure. 6 is a driving part, which adjusts the pressure by driving the pedestal 4, and 7 is a port for inputting an electrical input to the driving part. The whole of the pedestal (4) - the port (7) is called the adjustment member (8). Instead of the pedestal 4, the thread 10 may be brought into contact with a roller and braked to adjust the brake torque of the roller, and the mechanism for adjusting the tension is arbitrary. Also, 11 is an insulator (碍子) that guides the thread. Moreover, if the tension sensor 12 is provided in the top tension device 2, it can be used for measurement of the input value to the adjustment member shown in FIG. However, if the tension sensor 12 is installed in all the top tension devices 2 , the present invention is meaningless, and when the tension sensor is installed, only some top tension devices 2 are installed. In the case of measuring on the flat knitting machine 20 using the top tension device 2, after subtracting the correction amount corresponding to each element of the feeding thread used for the measurement, the top tension device (2) Make corrections according to the elements of the star rapid fire route.

Fig. 2 shows the measurement of the input value to the adjustment member. From a yarn source, such as a yarn package 16 , a yarn 10 is supplied to a pull-in member 14 via an adjustment member 9 and a tension sensor 12 . The adjusting member 9 is, for example, the same as the adjusting member 8 of the top tension device 2, or the same kind as the adjusting member 8, such as a high-precision version thereof. 12 is a tension sensor (張力sensor), and measures the tension applied to the thread (10). In the pulling member 14, for example, a pair of rollers clamps the yarn, and the roller is driven to draw in the yarn. The adjusting member 9, the tension sensor 12 and the retracting member 14 are examples of dedicated measuring means. In addition, the addition of the tension sensor 12 to the top tension device 2 (Fig. 1) is an example of measuring means used as a top tension device for a flat knitting machine. For each speed at which the thread is drawn by the pull-in member 14, the input value to the adjustment member 9 for the tension measured by the tension sensor 12 to become a desired value is measured by the measuring means 9b, It stores in a memory not shown in the drawing. As a result, the data of the table 26 shown in FIG. 3 is obtained. The table is for each pulling-in speed of the yarn 10, and a plurality of input values for each desired tension are preferably described for each pulling-in speed. Also, preferably, a measuring means for measuring and storing the input value to the port 7 is provided in the driving unit 8 of Fig. 1 as well. In addition, the table 26 is not prepared for each thread pulling speed, and the input value to the adjusting member 9 when the desired tension is obtained may be measured while the thread 10 is drawn at a slow speed. .

4 shows the setting of the top tension device 2 in the flat knitting machine 20 in the embodiment. Reference numeral 30 denotes, for example, a pair of needle beds, and 32 denotes a carriage for operating the needles of the needle bed 30 . Reference numeral 34 denotes an upper part of the needle bed 30, which supports the top tension device 2 and the yarn package not shown in the drawing. On both sides of the needle bed 30, there are, for example, an active yarn feeder 40 and a side tensioner 42, and the top tensioner 2 draws out the yarn from the yarn package and applies tension to actively feed the yarn. It feeds to the device 40 or the side tension 42 . Then, the yarn is fed to the carrier 44 from the active yarn feeder 40 and the side tension 42 , and from the carrier 44 to the needle of the needle bed 30 . An insulator (not shown in the drawing) is arranged in the feeding route to change the direction of the thread, and friction is applied to the thread by the insulator.

The flat knitting machine 20 includes a controller 22 , reference numeral 24 denotes a main body of the controller 22 , reference numeral 25 a controller of the carriage 32 , and numerals 26 to 28 denote tables. The table 26 stores the data shown in Fig. 3, and creates a table 26 for each yarn to be used. The table 27 stores the elements of the feeding route to the carrier 44 for each top tension device 2 . In addition, the data of the elements of the quick firing route may be generated from the organization data, or may be input by the user from the controller 22 .

The table 28 memorizes the correction amount for each element of the fire feeding route, for example, the added amount of tension for each insulator of the fire feeding route, and the yarn feeding point in the middle between the carrier 44 and the top tension device 2 . ), the correction amount according to the bending angle of the yarn in the middle of the feeding route, and the like are stored.

As a yarn feeder on the upstream side of the carrier, Fig. 4 shows an active yarn feeder 40 and a side tension 42. As shown in Figs. The positive yarn feeder 40 feeds yarn from between a pair of rollers, and feeds a yarn of a required length by controlling the number of rotations of the rollers. The side tension 42 serves as a buffer of the yarn while applying tension to the yarn. In addition, in the positive yarn feeder 40 and the side tension 42 , the appropriate values of the yarn tension to be applied from the top tensioner 2 side are different from each other. The yarn 10 may be fed directly onto the carrier 44 from the top tension device 2 without using either the positive yarn feeder 40 or the side tensioner 42 . In this case, the correction amount directly related to the feeding is stored in the table 28 .

Although not shown in the figure, there are a plurality of insulators between the top tensioning device 2 and the carrier 44, and the insulators actually bend the yarn. If there is an insulator, since frictional force acts on the yarn, the added amount of the tension for each insulator is stored in the table (28). Also, when the thread is bent by the insulator, the tension rises. Consider the range of the bending angle of the yarn in the insulator as 180° to 90°, and the amount of tension added according to the bending angle of the yarn (for example, in 9 steps, 0.4g increases for every 10° as it approaches 90° ) is remembered. In addition, since the tension loss from insulators and the like increases for thick threads, it is recommended to remember the correction amount according to the thread thickness (for example, correction in three steps of thickness less than 0.2 mm, 0.2 mm or more and 0.8 mm or less, and more than 0.8 mm). desirable.

The main body 24 calculates the speed at which the yarn is fed from the top tension device 2 based on knitting information such as the carriage speed, the type of push knitting or pull knitting, and the consumed loop length. . The main body 24 performs the following processing for each top tension device 2 in use. Elements in the yarn feeding route are read from the table 27, and the basic tension is obtained by referring to the table 28 depending on whether the yarn feeding destination is the active yarn feeder 40 or the side tension 42. Also, referring to the table 28, a correction amount for the tension for each element is obtained and added to obtain a basic tension. Next, referring to the table 26 according to the yarn feed speed, the set value of the top tension device 2 for the desired tension is read, and the adjusting member 8 of the top tension device 2 is set.

Fig. 5 shows a setting algorithm in the embodiment. As a preparation, the correction amount for each element of the fire feeding route is determined and stored in the table 28 . In the production of knitted fabrics, for example, the yarn used changes by season, and many new types of yarn are used even within one season. Here, data required for the table 26 is acquired once for one type of yarn, and this is transferred to the table 26 of each flat knitting machine 20 . In step S1, the input value to the adjustment member for applying the desired tension to the yarn for each yarn feed speed is measured and stored. At this time, the properties of the yarn change due to temperature, humidity, or the like, and an appropriate input value may change. For this reason, it is preferable to match the environment in which the input value to the adjustment member is measured and the installation environment of the flat knitting machine 20 . Further, since the properties of the yarn may change depending on the production lot, if necessary, it is preferable to acquire the data of the table 26 again when the production lot is changed.

In step S2, the thread feeding route is stored in the table 27 for each top tension device 2 . The execution order of steps S1 and S2 is arbitrary. In step S3, with reference to the correction amount stored in the table 28 and the thread feeding route stored in the table 27, a set value for the adjustment member 8 of the individual top tension device 2 is obtained. In addition, it is not necessary to repeatedly execute step S3 during knitting, and the change according to the yarn feed speed may be stored in the main body 24 or a table not shown in the figure, and only the change according to the yarn feed speed may be changed.

The detailed processing in step S3 is shown in steps S3a to S3d. In step S3a, the elements of the fire feed route are read from the table 27. Factors in the yarn feeding route include the bending angle of the insulator and the yarn there, the type of first yarn feeding destination from the top tension device such as an active yarn feeder or side tension, and the direction of knitting of push knitting or pull knitting, etc. there is. In step S3b, the correction amount for each element in the fire feeding route is read from the table 28 and added to make the total correction amount. In step S3c, a set value for applying a desired tension is read with reference to a sub table corresponding to the yarn feed speed in the table 26 created for each yarn. For example, in Fig. 3, the table 26 includes three sub tables according to the yarn feed speed. It is desirable to memorize the set values read here. In step S3d, the correction amount of the total calculated|required in step S3b is added to the set value read in step S3c, and it is set as the set value with respect to a top tension device.

The rapid fire rate is often changed during formation. In this case, steps S3a to S3d may be executed again. However, it is preferable to execute only step S3c again and find the change in the set value from the rapid fire speed before the change. And if this change is added to the set value before the change, the set value for the new rapid fire speed is obtained. During knitting, the direction of knitting, whether it is push knitting or full knitting, may be changed. In this case, the change amount of the correction amount according to the change of the knitting direction is obtained from the table 28, and this is added to the set value before the change of the direction to be the set value after the change.

In the embodiment, when a new type of yarn is used for a plurality of top tensioning devices 2, the data of the table 26 only needs to be acquired once, so it is very effective. Moreover, if the tension sensor 12 is provided in all the top tension devices 2, it is not necessary to implement this invention. However, in this way, a large number of tension sensors are required.

In Examples, the following effects are obtained in addition to the above.

· All the top tension devices 2 can be set constant for each yarn to be used. Accordingly, even if the carriers 44 are different, the stitch size of the knitted fabric can be made constant. Also, even if the flat knitting machine 20 is different, the stitch size can be made constant.

· A higher quality knitted fabric can be knitted by correcting the set value of tension according to not only the feeding speed but also the start of knitting, the knitting of stitches at the ends, push knitting or pull knitting, etc. Furthermore, since this is implemented as feed forward control based on knitting information, a delay similar to feedback control does not occur, and tension can be kept constant.

If the set value for the adjustment member 8 of the top tension device 2 is changed according to the carrier 44 without being constant, it is also possible to actively control the stitch size.

2: Top tension device
4: pedestal
6: drive unit
7: input port
8, 9: Adjustment member
11: insulator
10: thread
12: tension sensor
14: incoming member
16: Yarn Package
20: flat knitting machine
22: controller
24: body
25 : carriage controller
26-28: table
30: needle bed
32 : carriage
34: mounting table
40: active thread transfer device
42: side tension
44 : carrier

Claims (6)

A method of setting a top tension device provided on a flat knitting machine and provided with an adjusting member capable of electrically adjusting a tension applied to a yarn. ,
Measuring step of measuring and storing the input value to the adjusting member for applying the desired tension to the yarn for each yarn - The input value to the adjusting member is the rapid yarn route from the top tension device to the carrier In , it is a value that does not take into account the change in tension due to the element in contact with the yarn- and,
a step of memorizing an element with which the yarn comes into contact in the feeding route from the top tension device to the carrier;
In order to correct the tension changed by the factors of the feed firing route different for each top tension device, according to the factors of the feed firing route, the input value to the adjusting member is corrected to convert it into a set value for the adjusting member, and the adjusting member A setting step of applying the set value for the flat knitting machine to the adjustment member from the controller
A method of setting a top tension device of a flat knitting machine, characterized in that it is executed.
According to claim 1,
In the setting step, the yarn is fed from the top tension device and the type of yarn feeding destination on the upstream side of the carrier, the number of insulators through which the yarn passes in the feeding route, and the number of yarns in the feeding route. A method of setting a top tension device for a flat knitting machine, characterized in that the input value is corrected according to a bending method.
3. The method of claim 1 or 2,
The input value is measured for each of a plurality of feeding speeds, and a speed correction step of correcting the set value during knitting is performed according to the feeding speed of the yarn from the top tension device by the controller of the flat knitting machine. How to set the top tension device.
3. The method according to claim 1 or 2 ,
In the measuring step, the thread is supplied to the pull-in member through the adjusting member and the tension sensor, tension is applied to the thread by the adjusting member, the thread is drawn by the lead-in member, and the tension of the thread measured by the tension sensor A method of setting a top tension device for a flat knitting machine, characterized in that the input value to the adjusting member is measured when the desired value is reached.
4. The method of claim 3 ,
In the measuring step, the thread is supplied to the pull-in member through the adjusting member and the tension sensor, tension is applied to the thread by the adjusting member, the thread is drawn by the lead-in member, and the tension of the thread measured by the tension sensor A method of setting a top tension device for a flat knitting machine, characterized in that the input value to the adjusting member is measured when the desired value is reached.
A system comprising an adjustment member for adjusting tension applied to yarn by electrical input and setting a top tension device installed in a flat knitting machine, the system comprising:
A measuring means for measuring an input value to an adjusting member for applying a desired tension to the yarn for each yarn and a controller of the flat knitting machine are provided, wherein the input value to the adjusting member is a feeding route from the top tension device to the carrier In , it is a value that does not take into account the change in tension caused by the element in contact with the yarn .
The flat knitting machine's controller is
It is configured to store the element in contact with the yarn in the feeding route from the top tension device to the carrier,
In order to correct the tension changed by the factors of the feed firing route different for each top tension device, according to the factors of the feed firing route, the input value to the adjusting member is corrected to convert it into a set value for the adjusting member, and the adjusting member that is configured to apply the set value for
A setting system for the top tension device of a flat knitting machine.

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