JPS6262977A - Mesh control method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application 1) The present invention provides a method for adjusting the loop length of one stitch, which is the smallest unit of stitches constituting the knitted fabric, to uniformly when knitting a flat knitted fabric. Regarding the method.

[Conventional technology 1] When knitting a fabric in 8 horizontal rows, the fabric is knitted by the left and right reciprocating movement of the carriage, but at this time, the knitted fabric is knitted when the carriage moves rightward and when it moves leftward. There may be cases where the loop lengths of the stitches in the course are different.

The reason for this is that when the silk yarn feeding source is on one side of a knitting machine, the yarn feeding device pulls out the knitting yarn as the carriage moves outward (this drawing speed is at least as fast as the carriage moving speed). When knitting a knitted fabric (doubled) and when the carriage is reversed at the end of the knitting table and the knitting yarn that has already been pulled out is knitted, the amount of yarn when fed to the yarn feeding device is different. The tension was different, and as a result, the loops of the stitches knitted during the left and right transitions of the carriage were of different sizes. In addition, the stitches vary depending on the knitting speed of the knitting machine, and knitting irregularities may occur in the course of the knitted fabric. Therefore, as a means to make the thickness of the net fabric uniform, a reference section is set on the needle bed, and the thread length of the reference course fed to the needles in the reference section is used as the reference thread length when knitting the subsequent courses. The knitting yarn length used in the standard section of the course is compared with the standard yarn length, and the thread drive section is operated based on the comparison value, so that the knitting yarn length used in the standard section of the subsequent course is the standard yarn length. By comparison, a method of adjusting the stitch size was devised in which the knitting cam is operated so that the stitch size becomes larger when the former reaches more than the latter, and vice versa (Japanese Patent Application No. 57-217251@).

[Problem to be solved by the invention 1] In order to obtain uniformity of the stitches between the courses of the knitted fabric,
The knitting yarn length fed to the needles in the reference section provided on the needle bed is taken as the reference yarn length, and the yarn length fed to the needles in the reference section during course knitting after ili is compared with the reference yarn length, If you operate the knitting cam and adjust the stitches based on that value,
Although it is possible to adjust the thickness of subsequent courses so that it is equal to the standard yarn length, it is difficult to predetermine numerically how much the standard yarn length should be, and an approximate value is sufficient. Was.

The present invention has been made in view of this point, and by numerically setting the basic loop length of the stitches in advance, the loop length of the stitches of the knitted course is kept constant at a specified length. The purpose is to make the degree of merging constant and also to be able to determine the length of the knitted fabric in advance.

(Means for solving problems).

One stitch constituting the knitted fabric is taken as a basic loop, and its length is numerically determined in advance and stored as a designated value LA, and the actual chain length LB of the yarn required for subsequent course knitting is determined.
Compare the specified value length LA stored above LA-LB
) / When the absolute value of LA is smaller than the minimum correction limit amount β, the second correction is not made and (LA-LB)/L
When the absolute value of A is larger than the minimum correction limit amount β, a second correction is made, and when LA>LB, the loop length becomes longer, and when LA<LB, the loop length becomes shorter. Adjust the degree in each direction.

(Operation j Compare the standard value length stored in advance as a target value with the actual chain length of knitted fabric knitting, and when the correction execution limit W ratio exceeds a predetermined value, the knitting cam is adjusted to the loop length.) move in the direction in which the value increases or decreases.

(Example) From a plurality of knitting yarn packages 2 provided on the machine stand of the flat knitting machine 1, each knitting yarn 3 is detected by a yarn length detector 4 dedicated to each knitting yarn provided on both sides of the AAA stand. After t, the yarn is supplied to the needles (not shown) of the needle bed 7 by the yarn supplying member 6 reciprocating with the carriage 5.

On the front side of the needle bed 7 on the side 41, there is a number (
A needle pitch display section 8 is provided which is made up of small protrusions (the number of which is not necessarily 1:1), and a needle pitch sensor 9 of the carriage 5 is opposed to it, and the lock 10 of the carriage 5 is It detects whether it corresponds to the number nail.

The carriage 5 has a pair of knitting cams 11 and 12.
One or more locks 10 are provided, and each adjustment is made by raising and lowering the knitting cams 11 and 12. The Niratig cam 11.12 is the oblique i of the Raging cam 13.
14. It is installed on the main plate 15 of the carriage so that it can freely slide up and down diagonally parallel to 14? Sliding piece 17, 1 fitted to 1116
It is fixed at 8. Knitting cam 11°12 is
They are urged downward by springs 19 installed between the sliding pieces 17 and 18 and the base plate 15, respectively. Reference numeral 20 denotes a sliding piece stopper, which is supported by a guide member (not shown) sunk into the base plate 15 and a guide groove 22 provided in a lifting rod 21 (described later) so as to be slidable left and right on the base plate 15, and is moved to the left. When, knitting cam 11
When the knitting cam 11 tries to descend, it comes into contact with the lower end of the sliding piece 17 of the knitting cam 11, stopping the descent of the knitting cam 11, and when the knitting cam 12 tries to descend while moving to the right, the knitting Sliding piece 18 of cam 12
The knitting cam 12 stops descending. The lifting rod 21 is slidably supported by a member (not shown) on the base plate 15, and is provided with roll bins 23, 24. On the left and right sides of the lifting rod 21 are support shafts 25.2 planted on the base plate 15.
6 supports the swinging arms 27 and 28 so as to be swingable. The upper ends of the swinging arms 27 and 28 abut against roll bins 29.30 provided on the sliding pieces 17.18, respectively, and the swinging arms 27.2
The lower end portions of the roll bins 8 can move toward and away from the roll bin 23, respectively. In the above, since the sliding pieces 17 and 18 are each biased downward by the spring 19, the swinging arm 27 moves counterclockwise through the roll bin 29, and the swinging arm 28 moves counterclockwise through the roll bin 29. 30, they are each urged to rotate clockwise. At this time, if the end of the sliding piece stopper 20 comes into contact with, for example, the lower end of the sliding piece 17, the M moving piece 1
7 is prevented from descending, and only the sliding piece 18 descends, only the rocking arm 28 turns clockwise, and only the lower end of the rocking arm 28 contacts the roll bin 23, and the roll bin 23 and the rocking arm 27
It will be separated from the bottom edge of.

Reference numeral 30 denotes a pulse motor for power adjustment supported on the main plate 15 by a support member 31, and a cam 33 is attached to the motor shaft 32.
will be established. A roll pin 24 is in contact with a cam surface 34 of the cam 33. The contact pressure of the roll bin 24 against the cam surface 34 is based on the elastic force of the spring 19.

Therefore, when the cam 33 is rotated by the pulse motor 30 for power adjustment, the roll bin 24 in contact with the cam 33 is rotated.
rises or falls, its position is regulated, and the lifting rod 21
rises or falls. Therefore, the roll bin 23 swings the swing arm 27 or 28 depending on its position, and the sliding piece 17.18 is moved by the spring 19 via the roll bin 29.30.
It will either fall with the force of the spring or rise against the force of the spring. The amount of elevation is controlled by the rotation angle of the power adjustment motor 30.

Drive control of the power adjustment motor 30 is performed by a drive control section 50 that controls the drive of each part of the axle. Drive control section 5
0 is shown in block diagram form in FIG. The drive control section 50 includes a main control section 51. Storage section 52 for various information such as pattern 2 knitting machine control.
Fixed information input setting section 53. Yarn length comparison iW Tobe 54. Yarn length detection interface control section 55° edition One person output interface control section 56. Information input/output interface control unit 57 consists of a second motor interface control unit 58 and the like.

The main control calculation unit 51 is responsible for all control and calculation of this device, and is the center of the device, and is always connected to various control units and information according to programs such as real-time processing and batch processing, regardless of whether it is online or offline. Communicate and control to achieve desired results. The storage unit 52 is
When performing various types of knitting on a knitting machine, various types of knitting command input information (patterns, controls, etc.) are given to the knitting machine and the knitting machine knits according to the instructions. At the same time, it also stores the calculation results and control results of the knitting machine,
It is possible to read or rewrite the memory from the main control unit or the like. The fixed information input setting section 53 is
This is the part where fixed specification data for the knitting machine is set, and gauge input, backlash correction input, swing position correction input, yarn length calculation constant input, etc. are input. Thread length comparison numbing section 54
is a main calculation unit that compares the specified yarn length information from the main control unit with the measured yarn length information from the yarn length detection interface control unit 55, which will be described later, and sends the result to the main control unit 51. Part of it. The yarn length detection interface control section 55 transmits a signal from a yarn length detection intensifying section 59, which will be described later, to the drive control section 5.
This is an interface section for sending the yarn length measurement signal to 0, and it is also possible to judge whether the yarn length measurement signal is plus or minus 2, and to count and store these signals for each yarn used. The B machine output interface control section 56 has 8
This is the part that sends and receives the detection input from the needle pitch sensor, etc., which is input information from the machine, and the output signals from the solenoids, etc. for operating the knitting machine, to and from the knitting machine. The information input/output interface control section 57 is compatible with input devices for inputting various input information and output devices for outputting information that requires internal information, and can be controlled by instructions from the main control section. be done. The second motor face control unit 58 provides a circuit and an interface for controlling the forward and reverse rotation of the motor based on the calculation results from the main control.

The drive control section 50 includes a yarn length detection width increasing section 59. The information input/output media device 60 is provided with a motor drive section 61 for second adjustment, and a thread length detection interface control section 55. The information input/output interface control section 57 is connected to the motor interface control section 58 . The yarn length detection amplification section 59 is a circuit section that amplifies and shapes the detector output signal for measuring the knitting yarn length, and can take out a signal output for distinguishing between forward rotation and reverse rotation. The information input/output medium device 60 is connected to input devices for inputting various input information, output devices for outputting information that requires information in the device, and also outputs corrections and corrections results and stored contents. It is also possible to output Power adjustment motor drive unit 6
Reference numeral 1 denotes a drive control unit for a stitch adjustment motor 30 for moving the knitting cams 11, 12 of the lock 10 on the carriage 5 and adjusting the height thereof.

In the above-mentioned drive control section 50, the degree of knitting of the fabric to be knitted is inputted to the storage section 52 as data of the specified length LA by specifying the loop length or loop length of the loop for knitting the B fabric.

Here, the designated value length LA is given by the following equation.

However, [8-(ni1・N1・S+-...+n-Nn-
3) x to S, organization).

Nn: Number of loops in the course to measure the basic loop length (=number of needles).

S: Theoretical chain length correction factor for formation speed.

Theoretical enhancement correction factor in the direction of F=8.

17Theoretical chain length correction factor for winding down force.

K: Theoretical chain length correction factor for yarn spinning.

KJ: Theoretical chain length correction factor for thread passage load.

The above Nn (the number of loops in a course for measuring the basic loop length) is determined and stored in advance at which needle position in the course to be measured.

The loop length refers to the length 1 of the dashed-dotted line which is the center line of the knitting yarn 3 constituting the loop in FIG. 2, and the loop length refers to the height y. There is a relationship between y and 1 as V=kl, which is 0.2079 in the case of a plain knitted structure. The storage is carried out from the information input/output media device 60 to the information input/output interface control unit 57 through information media such as floppy disks and V71 tapes. The memory section 5 passes through the main control section performance section 51.
2 is stored. In addition to the loop length, the storage section 52 also stores the pattern of the knitted fabric to be knitted.

Organization command input information such as organization is stored.

The procedure for knitting the knitted fabric is as follows.

The above-mentioned storage is monitored by appropriate means such as a CRT, and the data is corrected by key operations, and the organization mode is set. The setting of the organization mode depends on whether or not to perform the stitch adjustment operation.
If you do, choose the loop length and loop length. Then, operation is started, but during the course to be organized, for example, a discarded course, no special adjustment is required. Therefore, it is determined from memory whether or not the course does not require such stitch adjustment, and only for courses that require stitch adjustment, the length of the net yarn actually used, that is, the actual chain length of the yarn used, is determined as LB and the specified value. A comparison is made with long [^.

However, when the carriage 5 moves, the needle pitch sensor 9 sequentially faces the needle pitch display section 8 provided in parallel with the needle bed 7, and transmits the needle pitch signal to the knitting machine input/output interface control section. The signal is input to the main control and performance section 51 via 56.

On the other hand, the knitting yarn 3 pulled out from the package 2 by the yarn feeding member 6 that moved with 8 vJ of the carriage is fed to the needles (not shown) of the needle bed 8. In the middle of this, knitting yarn 3 is knitted d
Since the yarn is wrapped around the yarn length detector 4 provided at the end of the machine an appropriate number of times, the yarn length detector 4 is rotated at the same time as the yarn is fed, and a pulse signal is generated as the yarn rotates. As mentioned above, the pulse signal indicates the yarn length fed to the needles in a predetermined specified range,
That is, the actual measured length of used yarn [B is emitted as a pulse signal, amplified in the yarn length detection ground section 59, and input to the yarn length comparison calculation section 54 via the yarn length detection interface control section 55. Here, the designated value length LA already stored in the storage unit 52 and the actual measured yarn length [B] are compared,
Calculate the absolute value of error rate (LA-LB) / LA, and if the error rate is larger than the abnormality processing limit ratio, take measures such as issuing a sound or light warning to stop the knitting machine in response to the abnormality. do. If the error rate is smaller than the abnormality processing limit ratio, the knitting continues as is, but if the error rate is smaller than the correction execution limit ratio β, no adjustment is made at all, and the error rate becomes the correction execution limit ratio β. If it is larger than , make the second adjustment. Here, the correction limit ratio β is a case where the error rate is less than or equal to that which can be corrected by the minimum unit of correction, and an error of that degree falls within a range that cannot be corrected. As mentioned above, the error rate (LA-LB)
When the absolute value of /LA is larger than the correction limit ratio β, the second adjustment is performed, but when the specified value length AL is larger than the actual measurement length [B, the specified value length is adjusted in the direction where the loop length becomes longer. ^
When is smaller than the actual measurement length [B, the loop length is adjusted in the direction of shorter. This adjustment is performed by adjusting the signal output from the main calculation unit 51 to the motor interface control unit 5.
8 to the stitch adjustment motor drive unit 61, and thereby adjusts the deviation by rotating the stitch adjustment motor 30 positively or negatively as described above.

In the above-mentioned adjustment of the degree, when the measured length of a predetermined number of loops is detected in the first course and it is known that the degree correction is necessary, the correction is actually performed when the carriage is reversed and the next This is not done when knitting the second course, but when the same yarn used in the first course is knitted in the same direction as the first course. This is to align the conditions for organization.

(Effect of the invention) According to the method of the present invention, when specifying the loop length or loop length of a knitted fabric, the length can be specifically specified in actual size, and the knitted fabric can be can produce a knitted fabric having uniform stitches with a length equal to the specified dimensions.For this purpose, it is possible to extract the yarn used for the entire knitted fabric in advance, and the total amount of yarn used for one loft can be reduced. In the case of patterned items, etc., it is possible to accurately predict each color, and it is possible to avoid using more thread than necessary.

In addition, since the specified value and the current measured value are compared during the knitting process, it is possible to obtain data for the stitch adjustment as described above, and to immediately detect any abnormality in the knitted fabric. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a block diagram including a drive control unit for carrying out the method of the present invention, FIG. 2 is a model diagram of a stitch loop, and FIG.
The figure is a front view of machine a, FIG. 4 is a plan view of the lock, and FIG. 5 is a cross-sectional view of the central portion thereof. 1...Loop length, y...Loop length, EΔ...
Specified value length. LB...Actual measurement length

Claims (1)

[Claims] 1. The total length of one or more predetermined number of basic loops constituting the stitches of a predetermined course to be knitted is determined in advance as a specified value length LA, and the specified value length LA and the knitted fabric are Compare the actual length LB of the yarn used to knit a predetermined number of loops during knitting, and when LA>LB, the loop length is lengthened, and when LA<LB, the loop length is shortened. A power adjustment method characterized by adjusting the power height respectively. 2. The total length of one or more predetermined number of basic loops constituting the stitches of a predetermined course to be knitted is determined in advance as the specified value length LA, and the specified value length LA and the predetermined number of loops are used when knitting the fabric. Compare the actual measured length LB of the yarn used for knitting, and if the absolute value of (LA-LB)/LA is smaller than the minimum correction limit β, do not make the second correction, ( L.A.
-LB)/When the absolute value of LA is larger than the minimum correction limit amount β, the second correction is made, and when LA>LB, the loop length is increased, and when LA<LB, the loop length is increased. A method for adjusting the length, which is characterized by adjusting the length in the direction of shortening the length. 3. The stitch adjustment method according to claim 1 or 2, wherein the length of the basic loop is the same as the length l of a line passing through the center of the yarn constituting one unit of stitch loop. 4. The degree adjustment method according to claim 1 or 2, wherein the basic loop length is the loop length y multiplied by 4.809. 5. When adjusting the thickness by comparing the specified value length LA and the measured value length LB, the scope of claim No. The power adjustment method described in item 1 or 2. 6. A patent claim for adjusting the stitch length in a subsequent knitting course in which knitting is performed using the same knitting yarn as the course in which the comparison was made, when the stitch stitch is adjusted by comparing the specified value length LA and the measured value length LB. The power adjustment method described in the first or second range. 7. The thickness adjustment method according to claim 1 or 2, wherein the specified length LA is a value obtained by multiplying at least the specified basic loop length by a coefficient and the number of loops that differ depending on the type of knitted fabric. . 8 The specified value length LA is the specified basic loop length,
A value that is multiplied by a coefficient and the number of loops that differ depending on the type of knitted fabric, and also multiplied by any or all of the specified length correction factors for knitting speed, knitting direction, unwinding force, yarn type, yarn path load, etc. A power adjustment method according to claim 1 or 2.