JP2872672B2 - Weft management method for weaving factory - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for managing the quality of a weft supply yarn supplying unit of each loom by a host computer common to a plurality of looms in a weaving factory.

2. Description of the Related Art A defective yarn feeder is unavoidable in the process of manufacturing a yarn feeder for supplying weft yarns. Therefore, in an actual weaving factory, a defective yarn feeder is set on a loom. When such a defective yarn feeder is set on the loom as a weft, the operating rate of the loom does not increase, and the productivity of the entire factory is reduced.

Therefore, conventionally, a weaver replaces the yarn feeder from experience while observing the weft stop state of the loom. However, according to such management, necessary information is not collected in a weft production process, and scientific quality control is impossible.

On the other hand, in today's weaving factories, many looms are placed under centralized control by the function of a host computer. Therefore, if the functions of the host computer are used, it is possible to centrally manage the operating states of a plurality of looms. Conventionally, various proposals have been made for such centralized management.
There is no effective means yet.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to scientifically execute the quality control of a weft supply for weft supply by utilizing the functions of a control device of each loom and a host computer common to them.

Means for Solving the Invention Under the above-mentioned object, according to the present invention, in a weaving factory, a host computer inputs stop data of a yarn feeder from a control device side of each loom, and further, based on stop data of each loom. Statistical values are determined, the quality of the yarn feeder of each loom is determined based on the obtained statistical values, and the content of the determination result is sent to a control device of a predetermined loom. Then, on the control device side of the loom, an alarm regarding the quality of the yarn feeder,
The content of the message is displayed, or the yarn feeder exchange device is operated based on the yarn feeder exchange command, and necessary measures are automatically performed. According to such management, accurate data on quality can be obtained for each yarn supplying body of the same kind of weft yarn, and the replacement standard of the yarn supplying body becomes clear, so that the management of the weft yarn can be performed accurately and easily.

Overview of Centralized Control Device FIG. 1 shows the relationship between a host computer 1 for centralized control and a number of loom control devices 2. The host computers 1 are connected to the respective loom control devices 2 by a data bus 4 via a communication control unit 3. Then, the weft yarn 6 is supplied to each loom 5 by a yarn supplying body 7. These yarn supply bodies 7 are indexed to predetermined supply positions by an exchange device 8 and fed into the weft insertion device of the loom 5 as weft yarns 6.

Next, FIG. 2 shows the internal configuration of the host computer 1 by functional blocks. That is, since the host computer 1 is configured as a computer, it is assembled as a storage, operation, control, and input / output device. However, as a function necessary to execute the method of the present invention, the in-process input means 11 It is composed of a yarn feeding designating unit 12, a loom searching unit 13, a yarn type data storing unit 14, a data temporary storing unit 15, a data reading unit 16, a statistical calculating unit 17, a determining unit 18 and an output unit 19. These are connected so that they can communicate with each other as shown in the figure.

FIG. 3 similarly shows the internal configuration of each loom control device 2 as a functional block. That is, the loom control device 2 is assembled as a control computer, and the weaving length input means 20, the yarn feed change sensor 2
1, counter 22, display means 23, stop data calculation means 24,
It is composed of a storage means 25, a stick sensor 27, and a communication means 28, which are connected as shown in FIG. The weaving length information includes the weaving time,
The number of picks and the weaving length are selectively input to the counter 22 by the switching means 29.

Weft yarn management method In weaving, each loom control device 2 is provided with a yarn feed change sensor.
In step 21, the type of the used yarn feeder 7 after the yarn supply exchange is read from a barcode or the like, and the read type is stored in the storage unit 25. The number of picks and the weaving length) are detected and counted by the counter 22. Then, the count values are sequentially sent to the storage means 25. On the other hand, when the loom 5 stops during weaving due to the weft stop, the weft stop sensor 27 detects the state and sends a weft stop signal to the storage means 25. In this way, the storage means 25 stores the data of the current weaving length of the yarn supplying body 7 (weft yarn type) and the number of times of weft stoppage. Therefore, the stoppage data calculation means 24 calculates the number of weft stoppages per unit length for the yarn feeder 7 in use from the data, and holds the result as stoppage data in a readable state. .

On the other hand, the host computer 1 executes the program of FIG. 4 based on the weft management method of the present invention.

First, after the program of the host computer 1 is started, the operator operates the in-process input means 11 to specify the type of the weft 6, that is, the type of the yarn supplying body 7, and writes it into the yarn supplying specifying means 12 and the data temporary storage means 15. . Thereafter, the loom search means 13 designates the numbers (No.) of the individual looms 5 in a fixed order from the large number of looms 5, and sets the in-process of the yarn feeder 7 of the specified type for the loom 5 being designated. The presence / absence is confirmed, and stop data is read from the loom control device 2 by the data reading means 16 for the loom 5 on which the yarn supply body 7 of this type is being processed, and stored in the data temporary storage means 15. of course,
If the designated yarn supplying body 7 is not in process, the reading operation is not performed for the loom, and the process jumps to the next step. In addition, the data of the type of the yarn feeder 7 and the number of each loom 5 is input to the host computer 1, and the specified type of the yarn feeder 7 is set in the host computer 1. Perform a number search,
Thereafter, the stoppage data may be read from the loom control device 2 of the loom 5 of the corresponding number. In this way, the reading of the data for all the looms 5 is completed, and after the completion of the predetermined search, the statistical calculation means 17 reads the stop data from the temporary data storage means 15 or further reads the yarn type data storage means. The past data on the type of the yarn feeder 7 of the type is also read from 14, and the average value and the standard deviation of the horizontal stoppage rate are calculated by statistical calculation, and are sent to the determination means 18. Therefore, the determining means 18 determines whether or not the stop data of each loom 5 is normal based on the calculated stop rate, that is, the determination value. For example, the stop data deviates from the average of the stop rates by a predetermined value or more. If the loom 5 with abnormal stop data does not exist, the data on the yarn feeder 7 of that type is sent to the yarn type data storage means 14 to update the data content. Or save the new data. If the stoppage data is abnormal at the time of the determination, an alarm, a message, or a yarn feeder replacement command is transmitted to the loom control device 2 of the loom 5 corresponding to the stoppage data as the content of the determination result. Yarn 7 input
The above-mentioned program is executed for all types, but when all types are completed, a series of programs is completed. When the stop data is not abnormal with respect to the discrimination value, the stop data is updated or accumulated for the type of the yarn supplying body 7, but the stop data is determined to be abnormal with respect to the discrimination value. Is not updated or stored. Therefore, the data of the discrimination value is transferred to the yarn type data storage means via the data temporary storage means 15.
It is sequentially updated or accumulated to 14 and is modified so as to match the actual general yarn supply.

Therefore, when the loom control device 2 receives a warning, a message, or the like, the loom control device 2 displays the content on the display means 23 to notify the weaver. When a yarn feeder exchange command is given, the loom control device 2 operates the exchange device 8 in response thereto, and replaces the yarn feeder 7 currently in use with a new yarn feeder 7 at the yarn feeding position. And a new weft thread 6 is automatically guided from the yarn feeder to a predetermined position of the weft insertion device. Such an automatic switching device 8 can be realized by the invention of Japanese Patent Application No. 62-77179 filed by the present applicant.

Calculation of Discriminant Value (Discriminant Function) The discriminant value (discriminating function) is obtained, for example, as follows.

 Now, it is assumed that the following items are given.

N: Number of rotations L: Yarn feed length C: Unit length cost W: Unit price of fabric per pick l: Consumption s: Number of stops η: Stopping rate (s / l) η ₀ : Average stopping rate t : Repair time t ': Time required for replacement Here, the loss when the current yarn feeder is not replaced is represented by the following formula, if the quality of the fabric is ignored.

(L−1) × (η−η ₀ ) × t × N × W Further, the loss when the current yarn feeder is replaced is represented by the following equation.

(L−1) × C + t ′ × N × W Therefore, the necessary discrimination value B is obtained by the following equation.

B = (η−η ₀ ) tNW− (C + t′NW) If C, t, N, and W are input in advance, the value of the discrimination value B can be obtained by obtaining η and η _0. .

Here, if B> 0, it is determined that a yarn feed exchange command is output. Note that the above equation is calculated assuming that the number of stops does not affect the quality.However, for a woven fabric with severe quality conditions where stopping is a defect, the quality of the quality is determined by the stopping rate before the above judgment. It is only necessary to predict whether or not a downgrade will occur and to instruct yarn replacement at that stage.

According to the present invention, based on stop data from a plurality of looms,
Accurate data can be obtained for each type of yarn feeder, and the standard for yarn feed exchange is clarified, so that the actual situation can be met. Therefore, weft yarn management in a weaving factory can be performed accurately and easily. .

In addition, since such data management is performed by a statistical method of quality control, the data is more rationalized than the conventional empirical response by a weaver. Then, since such management can be realized by the function of the host computer, the function of centralized management can be used more effectively.

When a warning or a message is displayed on each loom control device side as the content of the judgment result, information on the quality of the weft yarn supplying body can be obtained from the displayed content, so that an appropriate response can be taken based on the information. Becomes possible.

Also, when a yarn feeder replacement command is given to the yarn feeder replacement device as the content of the judgment result, the defective weft yarn feeder is automatically replaced, thereby saving labor and operating the loom. The rate is improved.

[Brief description of the drawings]

FIG. 1 is a connection diagram between a host computer for executing the method of the present invention and each loom control device, FIG. 2 is a functional block diagram of the host computer, FIG. 3 is a functional block diagram of the loom control device, FIG. The figure is a flowchart at the time of operation of the host computer. 1 ... host computer, 2 ... loom control device, 3 ...
... Communication control unit, 4 ... Data bus, 5 ... Loom, 6 ...
Weft, 7 ... Yarn feeder, 8 ... Changer.

Claims (3)

(57) [Claims] In a weaving plant, stop data by weft stop is stored in each loom control device of a plurality of looms, and the same type of weft yarn is stored in a host computer common to the plurality of looms. By reading the weft stop data from each loom control device on which the yarn feeder is set, and summing up these stop data, the weft of the type of weft is set on the entire weaving machine. The weft stoppage rate of the obtained loom is determined, and the weft stoppage rate of the obtained weft thread of each loom on which the weft supply of the type of weft is mounted is determined. By comparing the weft supply of each loom, the quality of the weft supply of each loom is determined, and the content of the determination result is sent to the loom control device corresponding to the weft supply of the weft determined to be defective. Weaving factory weft management method. 2. In a weaving factory, stoppage data by weaving is stored in each loom control device of a plurality of looms, and the same type of weft yarn is stored in a host computer common to the plurality of looms. By reading the weft stop data from each loom control device on which the yarn feeder is set, and summing up these stop data, the weft of the type of weft is set on the entire weaving machine. The weft stoppage rate of the obtained loom is determined, and the weft stoppage rate of the obtained weft thread of each loom on which the weft supply of the type of weft is mounted is determined. By comparing the weft supply of each loom, the quality of the weft supply of each loom is determined, and the content of the determination result is sent to the loom control device corresponding to the weft supply of the weft determined to be defective. On the device side, the judgment from the host computer Weft management method fabric factory and displaying alarm messages as the content. 3. In a weaving machine, stop data due to wefting is stored in each loom controller of a plurality of looms, and the same type of weft yarn is stored in a host computer common to the plurality of looms. By reading the weft stop data from each loom control device on which the yarn feeder is set, and summing up these stop data, the weft of the type of weft is set on the entire weaving machine. The weft stoppage rate of the obtained loom is determined, and the weft stoppage rate of the obtained weft thread of each loom on which the weft supply of the type of weft is mounted is determined. By comparing with the base rate, the quality of the weft supply of each weaving machine is judged, and the contents of the judgment result are sent to the loom control device corresponding to the weft supply of the weft judged as defective, and from the host computer. Yarn feeder as the content of the judgment result When receiving the exchange instruction, weft management method weaving factory, characterized in that to operate the yarn feeding member exchange system mounted to the loom.