JPH073024B2 - Loom operation control device - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a device for detecting a weft insertion error of a loom, warp yarn breakage, or the number of automatic repairs at the time of yarn breakage, and controlling the operating condition of the loom. .

[Background of the Invention]

Generally, a weaving machine is provided with a weft stopping device and a warp stopping device. For example, the weft feeler of the weft stop device continues the operation of the loom while checking the tip of the weft thread in the weft insertion state with the weft edge on the arrival side. However, when the weft thread does not reach the position of the weft thread feeler, that is, when a weft insertion failure occurs, the weft stop device generates a stop signal for the loom and automatically stops the loom.

However, even if the weft reaches the opening end, if the weft feeler does not detect it and stops the loom due to poor weft insertion, the running loom stops in an unnecessary state. It will be. Such an operating state causes a decrease in the operating rate of the loom and also causes a stop mark on the woven cloth.

On the other hand, the quality of the woven fabric is generally graded by the number of weave marks appearing on the woven fabric of a certain length. For example, luxury anti
It is stipulated that the number of weaving scratches should be less than 5 times per 50 m, and the number of intermediate and lower grades should be less than 1 per fixed length.
It is defined as 0 or less.

Therefore, weaving damage due to poor weft insertion, warp yarn breakage, etc. is allowed within the above range for each grade, so the operation of the loom continues within the allowable value and It is sufficient to stop the loom for the first time when the allowable value is exceeded. With such a control mode, the operating rate of the loom can be increased as much as possible while ensuring the quality of the woven cloth.

[Conventional technology]

Such a control method has been already proposed with various contents. For example, the invention of Japanese Examined Patent Publication No. 57-47774 or Japanese Patent Laid-Open No. 50-118062 discloses that a predetermined length of woven cloth, a predetermined number of picks, or a counting period within a predetermined time,
Indicates that the number of occurrences of a signal for poor weft insertion is counted, and when the count value is within a predetermined value, the operation of the loom is continued, and when it exceeds the predetermined number of times, the operation of the loom is stopped. There is. However, in such a counting method, when a certain counting period such as a predetermined length of the woven cloth, a predetermined number of picks, or a predetermined time is ended and the next new counting period is started, the update section is updated. When defects such as weft insertion mistakes are concentrated, those defects are distributed to the counting period before and after, so the loom does not stop even if the quality of the woven fabric is below the specified quality in the update interval, Will continue.

Further, the invention of Japanese Examined Patent Publication No. 60-11145 shows that the above-mentioned predetermined counting period is started from the time when the first weft insertion failure signal is generated. However, this improved method also has the same drawbacks as the above-mentioned conventional example. Therefore, even if weft insertion defects occur intensively at the time of updating the counting period, the loom continues to weave without stopping.

Furthermore, the invention of Japanese Examined Patent Publication No. 59-26690 discloses a counting method in which the loom is stopped when the number of defective weft insertions exceeds a preset number of times while inspecting the temporal occurrence intervals of poor weft insertions. is doing. Even in this counting method, as in the above case, even if the weft insertion defects occur intensively before and after the switching of the counting period, this state is not detected and is ignored.

As described above, in any of the conventional control methods, the counting period such as the predetermined length of the woven cloth, the predetermined number of picks for the weft insertion, or the predetermined time of the weaving is always fixed on the time axis. Since a new counting period is started at the end of the period, if weaving scratches or the like are concentrated at the time of switching the predetermined section, the state will be overlooked even if the number of times per unit length is exceeded. Will be lost.

For the above reasons, conventional control schemes are not sufficient to keep the quality of the woven fabric accurately and consistently graded.
Therefore, the inspection operation after weaving was essential.

[Object of the Invention]

Therefore, an object of the present invention is to accurately detect the number of restorations such as poor weft insertion, warp yarn breakage, or yarn breakage so as to be suitable for grading of woven fabrics, and to expand weaving scratches, and thus to prevent deterioration. It is to completely prevent the occurrence and to guarantee the quality of the woven material at the weaving stage.

[Means for Solving the Invention]

In view of the above, the present invention stores an input unit for detecting an operating condition of a detection target such as a weft insertion defect, warp yarn breakage, or yarn breakage repair, and an output from the input unit, and a predetermined period from the start of storing the output. Storage means for releasing the storage state of the output after the passage of, and a determination means for determining whether the number of outputs stored in the storage means exceeds a predetermined number,
An output means is provided for generating a coping signal by the output from the judgment means when the number of stored outputs exceeds a predetermined number.

In this way, the storage means stores each output from the input means for a predetermined period from the time when each output occurs, while the determination means determines that the number of stored outputs exceeds the predetermined number. The output means generates a coping signal including a control signal such as a loom stop signal and a loom restart prohibition signal and an alarm in association with the output from the determination means. Since there is no end of the counting period and no subsequent update, it is possible to reliably detect when a predetermined number of outputs from the input means occur within a predetermined period.

Therefore, in the present invention, it is possible to reliably prevent overlooking of weaving flaws.

[Structure of Invention]

FIG. 1 shows an operation control device 1 for a loom according to the present invention. The operation control device 1 includes an input unit 2, a storage unit 3,
The judgment means 4 and the output means 5 are provided, and these are
They are sequentially connected in series.

The input unit 2 detects a weft insertion error, warp yarn breakage, repair at the time of yarn breakage, and the like as the operation status of the detection target, and outputs this to the storage unit 3. Therefore, the storage means 3
Stores the output from the input means 2, and releases the stored state after a predetermined period T has elapsed for each output.
On the other hand, the judging means 4 compares the number of stored outputs with a predetermined number set in advance, judges whether the number of stored outputs exceeds a predetermined number, and based on the judgment result. Generate output based on the original. Then, the output means 5
In response to the output from the determination means 4, a control signal for stopping the loom or prohibiting the restart of the loom or a signal for outputting an alarm as necessary is generated as a coping signal.

[Operation of the Invention] FIG. 2 and FIG. 3 show the operation state when the detection target is misplaced. Assuming that misalignment occurs irregularly on the axis of time t, those signals a,
b, c, d, and e are sequentially sent to the storage means 3 via the input means 2 and stored in the storage means 3 for a predetermined period T respectively, and during that period T, the signal A of "H" level,
B, C, D, and E.

On the other hand, the judging means 4 judges whether or not there is a weft insertion error a predetermined number of times, for example, 5 times, on a certain time axis.

In FIG. 2, since the weft insertion errors have not occurred 5 times at the same time on the time axis, the output means 5 does not generate the coping signal S. Therefore, at this time, the loom is not stopped and the weaving is continued. However, in FIG. 3, on the time axis,
Since 5 weft insertion errors have occurred at the same time, the output means 5 generates the "H" level handling signal S at that time,
For example, the loom is automatically stopped.

If the detection target is the number of repairs of yarn breakage, when the number of repairs reaches a predetermined number, the loom is in the restart prohibited state due to the generation of the coping signal S. As described above, the control content naturally varies depending on the detection target.

[Embodiment 1] Embodiment 1 of FIG. 4 shows a case where the loom operation control device 1 of the present invention is configured by a relay circuit.

The input means 2 is connected to the input switch 8, the resistor 9, and their connection points connected in series between the one power supply terminal 6 and the ground 10 and the input terminal 19 side of the storage means 3. The waveform shaping circuit 18 is provided. The input switch 8 is interlocked with, for example, a weft thread feeler of a weft stop device as a detection target, and is set to an ON state when a weft insertion failure occurs.

The storage means 3 is incorporated between the output end of the waveform shaping circuit 18 and the other power supply terminal 7. That is, the above-mentioned input terminal 19 is branched into five, and serially connected relay contacts 152, 112, 122, 132, 142 and relay contacts 111, 12 respectively.
1, 131, 141, 151, pulse generators 21, 22, 23, 24, 25,
Drivers 26, 27, 28, 29, 30 and relays 11, 12, 1
It reaches the common power supply terminal 7 through 3, 14, and 15.

Further, this power supply terminal 7 is connected to the ground 16 via the relay 16 and the relay contacts 113, 123, 133, 143 and 153 connected in parallel.
Has reached. The relay 16 has relay contacts 152
To drive a relay contact 161 connected in parallel with. The earth 20 is connected to the power supply terminal 7 as a constituent part of the judging means 4 and is connected in series to the relay contacts 114, 124, 13.
It is connected to the power supply terminal 7 via the relay 17 of the output means via 4, 144, 154. The relays 11, 12, 13, 14,
Diodes for surge absorption 31, 32, 3 for 15, 16, 17
3, 34, 35, 36, 37 are connected in parallel. And
The relay 17 drives the relay contact 171 of the output means 5.

Whenever a misfeed occurs, the input switch 8 is turned on each time. In this way, the signals a, b, c, d, e as shown in FIG. 2 or 3 are stored in the storage means 3.
Are sequentially input.

When the signal a is input first, the first pulse generator 21
Generates the signal A over a predetermined period T, during which the relay 11 sets the other relay contacts 112, 113 and the relay contact 114 to the on state while keeping the relay contact 111 in the off state. . Next, when the signal b is input,
Similarly, the second pulse generator 22 generates the signal B, so that the relay 12 operates for a predetermined period T from the time when the signal b is generated.
For the duration of its ON state and its relay contact 12
While keeping 1 off, the other relay contacts 122, 123, 1
Set 24 to the on state. After that, when the signals c, d, and e are sequentially input, the pulse generators 23, 24, and
25 sequentially operates, and the relays 13, 14, 15 sequentially turn on the relay contacts 133, 143, 153 and the relay contacts 134, 144, 154 while turning off the relay contacts 131, 141, 151, respectively. Set to the state of. These pulse generators 21, 22, 23, 24, 25 set the corresponding relays 11, 12, 13, 14, 15 to the off state after a predetermined period T has passed. Each time the relays 11, 12, 13, 14, and 15 operate, the relay 16 sets the relay contact 161 to the off state. In this way, when the fifth pulse generator 25 operates, the relay 15 closes the relay contact 152 to set the pulse generator 21 to the operable state again. In this way, the relays 11, 12, 13, 14, 15 are set in an operable state while sequentially circulating.

Now, as shown in FIG. 2, if the signals a, b, c, d and e are not continuously generated during the predetermined period T, the judging means 4
Since the AND condition of is not satisfied, the relay 17 of the output means 5
Does not operate and does not generate the handling signal S of "H" level.

However, as shown in FIG. 3, when the signals a, b, c, d, and e are repeatedly generated a predetermined number of times, that is, five times, during a predetermined period T, all the relay contacts are contacted at a certain time. 11
Since 4,124,134,144,154 are in the ON state, the relay 17 of the output means 5 is activated at that moment, and the relay contact 171 is set in the ON state. "A level coping signal S is generated and sent as a stop signal to the control system of the loom to activate the weft stop device,
Stop the loom automatically.

In addition, the above-described embodiment is, as an example, for 5 hours during the predetermined period T.
Since it is assumed that there is a mistake in inserting the horizontal times,
The storage means 3 includes five pulse generators 21, 22, 23, 24, 25.
And relays 11, 12, 13, 14, 15, 16 and the judging means 4 comprises five relay contacts 114, 124, 134, 144, 15
It is equipped with 4 in series, and AND condition is taken between them. However, since these correspond to a predetermined number of weft insertion mistakes, the number increases corresponding to the setting of the predetermined number of times,
Or it will decrease.

[Embodiment 2] Next, in Embodiment 2 of FIG. 5, the detection target is the number of repairs of yarn breakage, the operation control device 1 is configured by a digital circuit, and is placed under the control of a control computer. The case is shown.

The input means 2 similar to the above-mentioned embodiment is connected to the pointer 39 of the buffer 40 through the additional circuit 38 of the storage means 3 and also to the up input terminal of the counter 41. Further, the clock signal generation circuit 42 of the storage means 3 is bidirectionally connected to the buffer 40 by the erasing circuit 44 by branching to the additional circuit 38 via the time counter 43, and the counter 41 of the counter 41. It is also connected to the down input terminal. Note that the setting circuit 45 connected to the erasing circuit 44 is operated for a predetermined period T.
Set by. The judging means 4 is composed of a comparator 47 connected to the counter 41 on one input side and to the setter 46 on the other side. The output of the comparator 47 is connected to a driver 48 as an output means 5 and a flip-flop 49.

As described above, the operation control device 1 is placed under the control of the computer for controlling the loom. FIG. 6 shows an operation sequence when the operation control device 1 is returned to the initial state on the control side. When a reset command is given to the control system, the buffer 40 is set to the clear state, the data number of the counter 41 is returned to "0", and the pointer 39 is returned to the head address.

In this state, the loom is in an operating state and starts weaving. The control shown in FIG. 7 is performed when the thread breakage is repaired.
Initiate the required action.

That is, when a thread breakage is detected during weaving, the loom is automatically stopped, and the thread breakage state is restored, the input switch 8 is turned on. Although the clock signal generation circuit 42 is stopped during this restoration period, when the start signal is given to the loom after the yarn breakage is repaired, it immediately operates and continues to send the clock signal to the time counter 43. Therefore, the time counter 43
Generates a pulse for a predetermined time and continues to send it to add circuit 38 and erase circuit 44.

First, when the signal a is input, the additional circuit 38 reads the time at that time from the time counter 43, and buffers it.
Write the time at the 1st address of 40,
The signal is stored as the signal A and the content of the counter 41 is incremented by "1". At this time, the pointer 39 advances by one and prepares for the subsequent input of the signal b.

Similarly, the following signals b, c, d, and e are sequentially signal B,
It is read as C, D, E, and is sequentially added as the number of data.

Meanwhile, in the meantime, as shown in FIG. 10, an erase operation is performed. In FIG. 10, the data is processed by the interruption of the timer at regular intervals regardless of the generation of the signals a, b, c, d, and e.

After the timer is interrupted, the operation control device 1 first reads the current time, and then reads all the data stored in the buffer 40. Next, as the data, for example, a determination is made as to whether or not the generation time of the signal a, that is, the rising time of the signal A occurs after a time point that is a predetermined time T backward from the current time. At the present time, when the predetermined period T has already passed, the storage state of the signal A is erased from the buffer 40 by the erase circuit 44. At the same time, the corresponding erase signal is input to the down input of the counter 41, and the number of data is decremented by "1". Further, in the above judgment process, when the signal a is generated in a section traced back by a predetermined period T from the present time, the erasing of the buffer 40 and the decrement of the data number of the counter 41 are not performed, and all of them are performed in the next step. A determination is made as to whether a check was made on the data in. If all the data have not been checked yet, the same operation is repeated again.

As shown in FIG. 8, when the signals a, b, c, d, and e are not simultaneously generated in the section of the predetermined period T, the addition and the subtraction of the counter 41 proceed in parallel, so that the counter 41 Does not reach a predetermined value, for example "5". However, as shown in FIG. 9, the signals a, b, c,
When d and e are intensively generated during the predetermined period T, the subsequent signals b, c, d and e are continuously added before the subtraction is performed on the first signal a, so that the counter 41
Is a predetermined count value "5" during a predetermined period T.
To reach. Therefore, at the time when the fifth signal e is input, the comparator 47 (count value of the counter 41 ≧ set value)
Is confirmed, and at that time, the flip-flop 49 is driven to generate the handling signal S of "H" level.

During this period, the yarn breakage is being repaired. Therefore, when the operator performs an operation for starting the loom, the loom automatically tries to start. However, the yarn breakage state is intensively repaired five times or more in a certain section of the woven cloth, the control output S is output to the control system of the loom, and the restart of the loom is prohibited. Will not start automatically. In this way, it is possible to completely prevent the occurrence of defective reaction for a given grade.

[Other Examples]

In the above embodiment, the predetermined period T is set according to time, but the predetermined period T can be set based on the running time of the loom, the number of picks for weft insertion, and the weaving length of the fabric.

〔The invention's effect〕

In the present invention, the storage means stores the output from the input means, and after a predetermined period has elapsed for each output, the storage state of each output is sequentially released, while the determination means stores the output in the storage means. It is judged whether the number of stored outputs exceeds a predetermined number, and when the number of stored outputs exceeds the predetermined number, the output means generates a coping signal, so that there is no update of the period as in the conventional case, and In addition, there is no oversight of the detection target before and after the renewal period, the weaving flaws are accurately monitored, and the operation control of the loom is reliably performed. Moreover, since the judgment is made only when a predetermined number of outputs are generated within a predetermined period, the loom is not stopped unnecessarily, and the operation rate of the loom can be increased as much as possible and the downgrade can be achieved. Since the occurrence of warp can be completely prevented and the quality of the woven fabric is completely guaranteed at the weaving stage, the inspection operation after weaving becomes unnecessary.

[Brief description of drawings]

FIG. 1 is a block diagram of an operation control device for a loom of the present invention,
FIGS. 2 and 3 are time charts during operation, FIG. 4 is a circuit diagram of the operation control device in the first embodiment, and FIG.
FIG. 6 is a block diagram of an operation control device according to the second embodiment, sixth.
FIGS. 7, 7 and 10 are flow charts during operation, and FIGS. 8 and 9 are time charts during operation in the second embodiment. 1 ... Loom operation control device, 2 ... input means, 3 ... storage means, 4 ... determination means, 5 ... output means.

Claims (1)

[Claims] 1. Input means for detecting an operating state of a detection target; storage means for storing an output from the input means; and releasing the storage state of the output after a lapse of a predetermined period from the start of storing the output, Judgment means for judging whether or not the number of outputs stored in the storage means exceeds a predetermined number, and when the number of outputs stored exceeds a predetermined number, a coping signal is issued by the output from the judgment means. And an output means for generating the operation of the loom.