JPH0593348A - Apparatus for controlling stop position of yarn feeder - Google Patents

Abstract

PURPOSE:To minimize the error of stop position by correcting the slippage each time the yarn feeder is released and stopped. CONSTITUTION:The stop position data S1 based on knitting data is corrected by slippage data S2 to obtain release position data S3. The data S2 is corrected by the deviation of the data S1 from the stop position data S5 of the released yarn feeder 4. The data S1 is corrected by the corrected data S2 to obtain the corrected data S3. The slippage is recorrected by the deviation of the data S1 from the stop position data S5 of the yarn feeder. The slippage is corrected each time the yarn feeder is released and stopped to enable the accurate stop at the desired stop position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn feeder stop position control device capable of automatically correcting the stop position of a yarn feeder after being released from a traveling carriage.

[0002]

2. Description of the Related Art A yarn feeder mounted on a yarn path rail disposed above a needle bed and parallel to the longitudinal direction of the needle bed is a yarn feeder provided on a carriage which is reciprocally scanned on the needle bed. The entrainment pin is used for entrainment and release, but when the entrainment is released at the yarn path switching point, the yarn feeder moves from the released position to the stopped position due to the sliding (friction) resistance between the yarn feeder body and the yarn path rail. It will be stopped at the distance (hereinafter referred to as the amount of slip).

Since the above-mentioned slip amount differs depending on the carrying speed, that is, when the knitting speed of the carriage is slow and when it is fast, the release point of the carrying pin is controlled according to the knitting speed, and for example, the switching point is increased as the knitting speed increases. By accelerating the release position for, the stop position of the yarn feeder can be made constant without being affected by the carriage speed.

Further, the position at which the yarn feeder is stopped with respect to the switching point can be designated for each knitting direction, knitting system and yarn feeder. As mentioned above, the stop position of the yarn feeders is such that the yarn feeders do not rest on top of each other or the released yarn feeders can be adjusted for other purposes.

As disclosed in Japanese Patent Publication No. 63-23301, a needle groove number correction setting device is provided to correct the positional deviation from the release of the yarn feeder to the stop thereof. There is also.

[0006]

However, on the knitting side, the stop position of the yarn feeder can be accurately adjusted by performing the control as described above. However, the slip amount of the yarn feeder can be adjusted. Vary depending on the difference in sliding resistance between individual yarn feeders and yarn guide rails, the difference in frequency of use, etc. This is due to wear of the sliding parts due to long-term operation of the knitting machine, and as a result, the amount of slippage. Also changes.

Alternatively, it also varies depending on the difference in the amount of oil applied to the thread guide rail. This is because even if one thread rail is used as an example, if the oil is not uniformly applied to the entire rail, the amount of slippage will be different between the areas where there is much oil and the areas where there is little oil. Or it will be affected by the environment such as dust and temperature. In particular,
When knitting an intarsia pattern, it is required to accurately control the stop position of the yarn feeder at the switching point of each yarn path, and the brake is applied to the sliding part of the yarn feeder main body side with the yarn path rail. There is also a mechanism provided so that it can be stopped immediately after releasing it, but this is only for shortening the braking distance after releasing the driving pin and is not a solution to the above problem,
Conventionally, after the stop position of the yarn feeder is specified, the stop state must be monitored every time the state of the machine changes or the environment changes, and the stop position must be corrected manually by trial and error. Inevitably it was a heavy burden on the workers.

As described above, the device is capable of constantly monitoring the slip amount of the yarn feeder, which can be said to be constantly changing under various conditions, and automatically correcting the release timing each time the slip amount changes. The present invention has been made for the purpose of providing the above.

[0009]

According to the present invention, a yarn feeder stop pin for stopping a yarn feeder entraining pin of a flat knitting machine at a desired position on a needle bed according to knitting data and stopping the yarn feeder at a predetermined position. In the position control device, storage means for storing the slip amount data, correction means for correcting the stop position data of the yarn feeder based on the knitting data by the slip amount data and outputting the release position data, and the release position data Reset output means for outputting a reset command for resetting the yarn feeder carrying pin based on the above, detection means for detecting the position of the stopped yarn feeder and outputting stop position detection data, the stop position data and the stop position detection data Change the slip amount data by comparing with It took measures that and a stage.

Further, the storage means is a storage means for storing the slip amount in the right row and the slip amount in the left row of the yarn feeder according to the speed of the carriage, and the slip amount changing means is the right side of the yarn feeder. A slip amount changing means for changing the slip amount in each row, the slip amount in the left row, and the speed of the carriage may be used.

Further, the detection means includes a detection piece fixed to the yarn feeder, a sensor for outputting a detection signal when passing through the vicinity of the detection piece, and a needle selection gauge when the detection signal is output. A detection unit that outputs the stop position detection data of the yarn feeder based on the data may be used.

[0012]

According to the present invention, the stop position data of the yarn feeder determined by the knitting data is corrected by the slip amount data to obtain the release position data to be entrained and released. The release position data is used to release the data. The stop position data is obtained by detecting the position where the yarn feeder released by the entrainment release actually stops.

The release position data and the stop position data are compared with each other, and the slip amount data is corrected according to the deviation between the two. When the yarn feeder is released next time, the stop position data of the yarn feeder determined by the knitting data is corrected by the corrected slip amount data to obtain the release position data.

Then, the actual stop position of the yarn feeder at that time is detected, and the slip amount is corrected again by the deviation between the stop position data at this time and the stop position data determined by the knitting data. In this way, the operation is performed while correcting the slip amount each time the yarn feeder is released and stopped, so that the error in the stop position can always be suppressed to the minimum.

The slip amount of the yarn feeder is
Since there are variations depending on the right row and the left row, it is possible to control the stop position more accurately by storing them as the respective slip amounts. Also, the slip amount of the yarn feeder is
Since it also changes depending on the speed of the carriage, that is, the initial speed when the carriage is released, if the slip amount is corrected according to the speed of the carriage, the stop position can be controlled more accurately.

[0016]

Embodiments of the yarn feeder stop position control device of the present invention will be described below in detail with reference to the drawings.

In FIG. 1 showing an example of a flat knitting machine equipped with a yarn feeder stop position control device of the present invention, 1 is a carriage, 11 is a needle bed, 12 is a plunger box, 5 is a yarn path rail, 4 is a It is a yarn feeder. In FIG. 2, which shows the main part, 12 is a plunger box provided on the carriage 1, which is a yarn feeder entrainment pin 2 and drive mechanisms 21 and 2 for controlling it.
It has two magnetic sensors 31, 32.

The yarn feeder 4 is slidably provided along the yarn path rail 5, and when the yarn feeder entrainment pin 2 is projected, the yarn feeder 4 travels left and right in conjunction with the traveling of the carriage 1, and the yarn feeder entrainment pin 2 is moved. When 2 is sucked upward, it is released from the linked state with the carriage 1 and braked by frictional resistance or the like to stop. A small magnet 42 that can be detected by the magnetic sensor is embedded in the yarn feeder 4.

The detection signals of the magnetic sensors 31 and 32 are input to the controller 6, and the drive mechanism 21 is controlled by the controller 6. To the controller 6, needle selection gauge data is input as carriage position data. While describing the control device 6 in detail with reference to FIG.
The operation of the present invention will be described.

The following is an example of the case where a 7 gauge flat knitting machine is used and knitting is performed using a yarn feeder No. 1 at a carriage speed of 50 m / min. In the knitting data output circuit 66, knitting data (for example, needle No. 2
The data "200" as 00 and the reset correction data (for example, data "+4" for four + needles) are input and added to obtain stop position data S1 (data "204" as needle No. 204). The stop position data S1 is a desired stop position at which the yarn feeder is desired to be stopped, and may be stored as a single data without being divided into the knitting data and the reset correction data as described above.

In the slip amount storage circuit 63, speed correction data (for example, data "-" for five needles
5 ") and slip amount data (for example, data" -1 "for one-needle) are stored, and these data are added to make the slip amount data S2 (data" -6 for six needles "). In the correction circuit 64, the stop position data S1 (data "204") and the slip amount data S2 (data "-6") are added to release position data S3 (needle No. 198). As data “198”)
Is obtained.

The release position data S3 is input to the reset output circuit 65 and compared with the carriage position data.
When they match (at needle No. 198), a release command is output. The drive mechanism 21 is controlled by this release command, the yarn feeder entrainment pin 2 is raised, and the yarn feeder 4 is released.

The released yarn feeder 4 is braked by the sliding resistance with the yarn guide rail 5 or the like, and stops at a position slightly ahead of the released position (for example, the needle No. 205). When the actual stopped position (needle No. 205) is compared with the stopped position data S1 (needle No. 204), it is found that one needle has gone too far and stopped. This indicates that the actual slip amount data of the yarn feeder was larger than the set value, assuming that there was no error in the speed correction data.

Therefore, the actual stopped position output from the detection data output circuit 67 detected by the sensors 31 and 32 (data “205” as the needle No. 205)
Of the stop position data S1 (data "204") output from the knitting data output circuit 66 (data "-"
The slip amount changing circuit 62 rewrites the slip amount data with new data (data "-2") based on 1 ").

Since the slip amount is rewritten every time the yarn feeder is released, the slip amount of the yarn feeder is always corrected to the most accurate value. Therefore, the slip is corrected and output by the correction circuit 64. The position data always has a small error. Therefore, the position at which the yarn feeder actually stops can always be exactly at the predetermined position.

With respect to the small magnet as the detection piece of the yarn feeder, it is possible to recognize two yarn feeders per track by changing the polarities of the magnets. It is possible to detect the yarn feeder and correct the slip amount. In addition to the small magnet and the magnetic sensor, it is possible to obtain the stop position detection data of the yarn feeder by an encoder driven by a belt on each yarn feeder, a potentiometer connected to the yarn feeder, or the like.

Regarding the slip amount data shown in FIG. 4B,
In the above embodiment, the speed correction data (data "-5") and the slip amount data (eg data "-1")
Slip amount data (data "-6") is obtained by storing and separately and adding both, but they may be stored as a single data (data "-6") including both. ..

Then, common speed correction data for a plurality of yarn feeders are used as typical data (default value), and each yarn feeder has slip amount data in consideration of sliding resistance with the yarn guide rail. I'll let you. In the above description, a single yarn feeder has been described, but for a plurality of yarn feeders, each correction data may be stored in each yarn feeder.

[0029]

As described above, the slip amount of the yarn feeder, which may be said to be constantly changing under various conditions, is constantly monitored, and the release timing is automatically corrected each time the slip amount changes, which is desirable. It is possible to always accurately stop at the stop position. Therefore, the workability of operation management of the knitting machine is improved, and the defect occurrence rate of the knitted fabric is also reduced.

[Brief description of drawings]

FIG. 1 is an overall front view of a flat knitting machine including a yarn feeder stop position control device of the present invention.

FIG. 2 is an enlarged view showing a main part of the yarn feeder stop position control device of the present invention.

FIG. 3 is a block diagram of a yarn feeder stop position control device of the present invention.

FIG. 4 is an explanatory diagram showing an example of knitting data and slip amount data.

[Explanation of symbols]

 2 Yarn feeder entrainment pin 31 Sensor 32 Sensor 4 (41) Yarn feeder 42 Detection piece 6 Control circuit 61 Detection means 62 Sliding amount changing means 63 Storage means 64 Correction means 65 Reset output means 67 Detection data output circuit S1 Stop position data S2 Slip Quantity data S3 Release position data S4 Reset command S5 Stop position detection data S6 Needle gauge data S7 Detection signal

Claims (3)

[Claims] 1. A yarn feeder stop position control device for resetting a yarn feeder interlocking piece of a flat knitting machine at a desired position on a needle bed according to knitting data to stop the yarn feeder at a predetermined position. The storage means storing the, the correction means for correcting the stop position data of the yarn feeder based on the knitting data by the slip amount data and outputting the release position data, and the yarn feeder entraining pin based on the release position data. Reset output means for outputting a reset command for resetting, detection means for detecting the position of the stopped yarn feeder and outputting stop position detection data, and comparing the stop position data and the stop position detection data,
A yarn feeder stop position control device, comprising: a slip amount changing means for changing the slip amount data. 2. The storage means is a storage means for storing the amount of slippage in the right row and the amount of slippage in the left row of the yarn feeder according to the speed of the carriage, and the sliding amount change means is the storage amount of the yarn feeder. 2. The yarn feeder stop position control device according to claim 1, which is a slip amount changing unit that changes the slip amount in the right row, the slip amount in the left row, and the speed of the carriage, respectively. 3. The detection means, a detection piece fixed to the yarn feeder, a sensor that outputs a detection signal when passing near the detection piece, and a needle selection gauge when the detection signal is output. The yarn feeder stop position control device according to claim 1, further comprising a detection data output circuit that outputs stop position detection data of the yarn feeder according to data.