JP2822043B2 - Two beam delivery control device - Google Patents

Description

Description: TECHNICAL FIELD [0001] The present invention relates to a two-beam electric delivery device for a loom, and more particularly, to a device for controlling a delivery amount of a warp yarn between two beams.

[Conventional technology]

In a wide-width loom, two delivery beams are set in the weave width direction for warp supply and driven by a delivery device.

In a delivery device of a type in which two delivery beams are connected to each other at a shaft portion and are driven by a mechanism connected to a main shaft of a loom through one continuously variable transmission, the delivery beams of the delivery beams are connected to each other. In addition to the connecting operation between the two shafts, the warp yarns wound around the two delivery beams in the initial stage of the machine must have the same length and the same winding diameter. If the winding diameters are different between the two delivery beams, the delivery amount of the warp yarns will be different thereafter even if the same delivery rotation amount is given to the two delivery beams.

On the other hand, as shown in JP-B-58-38543 and JP-A-59-69360, two delivery motors are independent of each other, and each delivery beam is driven by a dedicated delivery motor. Does not require the operation of connecting the shafts at the time of setting, and eliminates the necessity of having two warp yarns having the same warp length and the same winding diameter. However, since each of the delivery motors is configured as an independent tension control system for each corresponding delivery beam, during the delivery process,
Depending on the disturbance in each tension control system, the sending amount of each sending beam does not always match. For this reason, in the front part of the weaving, a step is easily generated in the front and rear directions in the weaving width direction for each warp yarn of each delivery beam. If a step occurs, it becomes a very noticeable presence as a drawback of the fabric.

[Object of the invention]

Therefore, an object of the present invention is to eliminate the drawback of the prior art, namely, the difference in the amount of delivery between the respective delivery beams, while employing a method in which the two delivery beams are driven by independent delivery motors, respectively. Is to surely prevent the occurrence of a step.

[Solution of the Invention]

According to the present invention, when the two feed beams for warp supply are driven by dedicated feed motors, respectively, the controller of one of the feed motors is configured as a tension control system to respond to warp yarn tension fluctuations. Then, while controlling the delivery amount, the controller of the other delivery motor is configured as a tracking synchronization control system, and the other delivery motor is synchronized with the actual rotation amount signal of one delivery motor, and is followed by a predetermined ratio. Control.

Here, the setting of the ratio is manually set in advance in consideration of the winding diameters of the two outgoing beams, and is made constant during operation, or a change in the winding diameter of both outgoing beams is detected during operation, It is determined by calculation based on the winding diameter ratio of both, and is changed.

According to such control, one of the delivery motors
In order to maintain the warp tension at the target value, the warp feed amount is controlled, while the other feed motor is
It follows in synchronization with the rotation amount of one of the delivery motors. For this reason, the amount of warp sent between both the sending beams is substantially constant.

〔Example〕

FIGS. 1 and 2 show the configuration of a two-beam type electric delivery device 1 and a two-beam delivery control device 10 of the present invention, which are the premise of the present invention.

In FIG. 1 and FIG. 2, the two-beam electric delivery device 1 includes two delivery beams 2 and 3. These delivery beams 2 and 3 are arranged in the weaving width direction on the same axis with the warp yarns 4 and 5 wound thereon, and are driven by independent delivery motors 6 and 7, respectively. In addition, the warp yarns 4 and 5 are respectively sent out in a sheet form, wound around the tension roll 8, and then guided in a direction before weaving.

Further, the two-beam feeding control device 10 of the present invention is assembled by a tension controller 11 and a synchronization controller 12.

One tension controller 11 is configured as a tension control system,
The tension of the warp yarns 4 and 5 is detected as a tension signal of an electric quantity from the load of the tension roll 8 by the tension detectors 13 and 14 such as one or two load cells, and the deviation between the tension at the time of detection and the target tension is detected. By controlling one of the feed motors 6 based on the drive signal A from the internal tension control circuit 17, the feed amount of the warp yarns 4 is controlled.

The other synchronization controller 12 is a tracking synchronization control system,
According to the example in the figure, only the actual rotation amount signal D from the encoder 19 connected to one of the delivery motors 6 is input,
By rotating the other delivery motor 7 at a predetermined ratio k with respect to the actual rotation amount of the one delivery motor 6,
According to the example of FIG. 2, the actual rotation amount signal D is input and the other delivery motor 7 is connected to the one delivery motor 6.
By rotating the warp yarn 5 at a predetermined ratio k with respect to the actual rotation amount of the warp yarn 5, the warp yarn 5 is synchronized with the warp yarn 4 and the drive signal A from the tension control circuit 17 and the two send beams 2, 3 Based on the predetermined ratio k given based on the winding diameter ratio, the other delivery motor 7 is caused to follow the other delivery motor by the correction signal E obtained by multiplying the drive signal A by the predetermined ratio k.
Here, the predetermined ratio k is set in advance as a constant value, and is not changed during operation, or in the feeding process, the winding diameter ratio of the warp yarns 4 and 5 with both the sending beams 2 and 3 is measured, and during the operation, It is set to follow the change in the ratio.

During operation, the tension controller 11 receives the tension signal from one of the tension detectors 13 or the average tension signal from both the tension detectors 13 and 14 as an input, and detects the tension signal after detection and the target tension. And the tension control circuit 17 inside the tension controller 11
Then, a drive signal A proportional to the deviation is generated, and one of the delivery motors 6 is rotated in the delivery direction based on the drive signal A. Thus, the tension of the warp yarn 4 is controlled so as to always reach a target value as the weaving progresses.

On the other hand, the synchronization controller 12 receives only the actual rotation amount signal D, or the actual rotation amount signal D and the drive signal A, and synchronizes them within the synchronization controller 12 by a predetermined ratio k. The rotation amount of the other delivery motor 7 is controlled based on the synchronous drive signal B, and the warp yarn 5 is delivered by the delivery beam 3.

Here, as described above, the predetermined ratio k is set in advance as a constant value and is not changed during operation, or the winding diameters R1 and R2 of the warp yarns 4 and 5 are determined during operation by the winding diameter detectors 15 and 16. , And are determined from the winding diameter ratio R1 / R2 of both.

FIG. 3 shows the amount of delivery or delivery time on the horizontal axis and the winding diameters R1 and R2 of the warp yarns 4 and 5 of the respective delivery beams 2 and 3 on the vertical axis, and shows the state of change thereof. I have. Usually, the winding amounts of the warp yarns 4 and 5 in the delivery beams 2 and 3 are the same, but since their winding hardness is different, the winding diameters R1 and R2 of the warp yarns 4 and 5 of the delivery beams 2 and 3 are Are different. For this reason, if the same amount of warp yarns 4 and 5 are sent out per unit time as the weaving progresses, the warp yarns 4 and 5 will disappear at almost the same time for both the sending beams 2 and 3. . The change in the winding diameter at that time appears as an upwardly convex curve as seen in FIG. Moreover, the winding diameter ratio R1 / R at each time point
2 can be considered almost constant. The above-described predetermined ratio k is calculated approximately in advance by calculating these winding diameter ratios R1 / R2,
Set as a constant. Further, the predetermined ratio k is determined by the fact that the winding diameters R1, R2
Can be detected by the winding diameter detectors 15 and 16 and set based on the ratio between the two.

According to this control, even if the winding diameters of the warp yarns 4 and 5 on the two delivery beams 2 and 3 are different at the initial stage of the machine, the other delivery motor 7 follows the one delivery motor 6. As a result, warp yarns 4 and 5 of almost the same amount can be delivered between the two delivery beams 2 and 3. Moreover, according to this control, the winding amounts of the warp yarns 4 and 5 by the two delivery beams 2 and 3 do not necessarily have to be the same.

Of course, at the initial stage, two outgoing beams 2,
Depending on the magnitude relationship between the winding diameters R1 and R2 of the warp yarns 4 and 5 on 3, the ratio k is a value larger or smaller than 1. However, if the winding diameters are the same as the winding diameters R1 and R2, the ratio k is 1
Is set as

[Specific Example 1 (FIG. 4)] Specific example 1 of FIG. An example in which the predetermined ratio k is set as a constant without being changed during operation, and corresponds to the embodiment in FIG.

In FIG. 4, a tension controller 11 detects the tension of the warp yarns 4 and 5 by, for example, one tension detector 13 and sends it to a tension control circuit 17 as a tension signal. here,
The tension control circuit 17 compares the target tension value with the detected actual tension value, generates a drive signal A proportional to the deviation, gives the drive signal A to the drive circuit 18, and controls the rotation amount of the delivery motor 6. I do. Note that the actual rotation amount of the delivery motor 6 is detected as an actual rotation amount signal D by an encoder 19 connected to the delivery motor 6, and is negatively fed back to the tension control circuit 17. Thus, the rotation amount of the delivery motor 6 accurately follows the deviation.

On the other hand, the synchronization controller 12 receives only the actual rotation amount signal D from the encoder 19 by one input terminal of the synchronization control circuit 21 such as an up / down counter, and according to a predetermined ratio k given in advance by the setting unit 20. A drive signal B = kD is generated, and the feed motor 7 is rotated via the drive circuit 22. Note that the actual rotation amount of the delivery motor 7 is detected by the encoder 23 and is negatively fed back to the other input terminal of the synchronization control circuit 21.

According to the specific example 1, since the ratio k is preset in an initial state, the control is simple.

[Specific Example 2 (FIG. 5)] The specific example 2 of FIG.
The winding diameters R1 and R2 of the warp yarns 4 and 5 are detected, a predetermined ratio k is calculated therefrom, the ratio k is changed during operation, and the speed at which the delivery motor 7 follows the delivery motor 6, particularly a transitional speed. This is an example of increasing the response speed, and corresponds to the embodiment of FIG.

In FIG. 5, the averaging circuit 24 inside the tension controller 11 is shown.
Detects the load at the end of the tension roll 8 from the two tension detectors 13 and 14, calculates the average value of the tension of the warp yarns 4 and 5, generates a tension signal, and sends it to the tension control circuit 17. The tension control circuit 17 generates a drive signal A proportional to the deviation between the average tension signal and the target tension, and supplies the drive signal A to the drive circuit 18 to rotate the feed motor 6 in the same manner as in the first embodiment. At the same time as controlling the quantity, the multiplication circuit inside the synchronization controller 12
The same drive signal A is given to 27.

On the other hand, the two winding diameter detectors 15 and 16 respectively provide the winding diameters R1 and R1 of the warp yarns 4 and 5 at the positions of the corresponding delivery beams 2 and 3 respectively.
R2 is detected and sent to the arithmetic circuit 26 inside the synchronization controller 12. Here, the arithmetic circuit 26 calculates the diameter ratio R1 / R2 of the two,
A predetermined ratio k = R1 / R2 is calculated for each predetermined sampling period, and is sent to a multiplication circuit 27 inside the synchronization controller 12 and a synchronization control circuit 21 such as an up / down counter.

Therefore, the synchronization control circuit 21 takes in the actual rotation amount signal D from the encoder 19, generates a correction signal C = kD,
The signal is sent to an addition point 25 on the input side of the drive circuit 22. Further, the multiplication circuit 27 multiplies the drive signal A by a predetermined ratio k to generate a correction signal E = k · A, and sends it to the addition point 25 on the input side of the drive circuit 22. Therefore, the drive circuit 22 receives the synchronous drive signal B = C + E as input and rotates the delivery motor 7 in the delivery direction. Note that the actual rotation amount of the delivery motor 7 is detected by the encoder 23 and is negatively fed back to the other input terminal of the synchronization control circuit 21.

As described above, according to the second embodiment, when a tension deviation occurs on the tension controller 11 side, the drive signal A is output from the synchronous controller.
It is also sent directly to 12, multiplied by the ratio k in the multiplication circuit 27,
It becomes a part of the synchronous drive signal B. Therefore, the driving circuit 22
Causes the delivery motor 7 to respond quickly according to the control signal A at the beginning of the occurrence of the tension deviation. As a result, the other delivery motor 7 is driven while being proportional to the rotation amount of the one delivery motor 6 and being corrected at the predetermined ratio k. Further, since the winding diameters R1 and R2 of the warp yarns 4 and 5 on the two sending beams 2 and 3 are measured, the winding amounts of the warp yarns 4 and 5 are different at the initial stage for the two sending beams 2 and 3. Can also be woven.

〔The invention's effect〕

In the present invention, of the two delivery motors that independently drive the two delivery beams, one of the delivery motors is driven by a tension controller as a warp tension control system, and the other delivery motor is an actual one of the delivery motors. It is controlled by a synchronization controller as a tracking synchronization control system that follows the rotation amount in a synchronous state at a predetermined ratio. Therefore, even if the initial winding diameter and winding amount of the two delivery beams are different, and even if the winding diameters of the warp yarns are different due to the difference in winding hardness, despite the same length of winding, the two Since the delivery amount of the warp yarn can be set to be substantially the same between the two delivery beams, it is possible to weave a woven fabric having no step in the weaving width direction for each of the warp yarns of the delivery beams having different winding diameters and winding amounts.

In particular, according to the first aspect, even if one of the delivery motors does not faithfully respond to the drive signal from the tension control circuit due to the influence of disturbance or the like, and an error occurs in the actual rotation amount,
Since the other feed motor follows the actual rotation amount including the error synchronously, the difference in the feed amount between the two feed motors can be controlled by independent tension system controllers for each of the two feed motors. It is smaller than that of the control system.

According to the second aspect, in addition to the effect of the first aspect, the drive signal of the tension control circuit is also sent to the synchronous controller at a predetermined ratio.
The response speed of the synchronous controller is increased.

[Brief description of the drawings]

FIG. 1 is a block diagram of a two-beam feed control device of the present invention, FIG. 2 is a block diagram of a two-beam feed control device of the present invention, FIG. The figure is a block diagram of the first embodiment, and FIG. 5 is a block diagram of the second embodiment. DESCRIPTION OF SYMBOLS 1 ... 2 beam type electric delivery apparatus, 2, 3 ... Delivery beam, 4, 5 ... Warp, 6, 7 ... Delivery motor, 8 ... Tension roll, 10 ... 2 beam delivery control apparatus, 11 …… Tension controller, 12 …… Synchronization controller, 1
3, 14 ... tension detector, 15, 16 ... winding diameter detector, 17 ...
Tension control circuit, 18 Drive circuit, 19 Encoder, 20
…… Setting device, 21 …… Synchronous control circuit, 22 …… Drive circuit, 23
…… Encoder, 24 …… Average circuit, 25 …… Addition point, 26 …… Operation circuit, 27… Multiplication circuit.

Claims (2)

(57) [Claims] 1. Two warp supply beams (2, 3) are arranged in the weaving width direction, and each of the discharge beams (2, 3) is independently driven by a corresponding discharge motor (6, 7). In the two-beam type electric feeding device (1), a tension detector (13, 14) for detecting the warp yarn tension and a tension signal detected by the tension detector (13, 14) are input, and one of the feeding is performed. Connect the motor (6) to the tension control circuit (1
7) A tension controller (11) that rotates by the drive signal (A) to control the warp tension to a target tension, and an encoder that generates an actual rotation amount signal (D) of one of the feed motors (6). 19) and only the actual rotation amount signal (D) from the encoder (19) as inputs, the other delivery motor (7) is driven by two delivery beams (2) with respect to the actual rotation amount of one delivery motor (6). A synchronous controller (12) for following rotation with a rotation amount of a predetermined ratio (k) given based on the winding diameter ratio of (2) and (3).
Beam delivery control device (10). 2. Two warp supply beams (2, 3) are arranged in the weaving width direction, and each of the discharge beams (2, 3) is independently driven by a corresponding discharge motor (6, 7). In the two-beam type electric feeding device (1), a tension detector (13, 14) for detecting the warp yarn tension and a tension signal detected by the tension detector (13, 14) are input, and one of the feeding is performed. Connect the motor (6) to the tension control circuit (1
7) A tension controller (11) that rotates by the drive signal (A) to control the warp tension to a target tension, and an encoder that generates an actual rotation amount signal (D) of one of the feed motors (6). 19) and a predetermined ratio (k) given based on the actual rotation amount signal (D) from the encoder (19) and the winding diameter ratio of the two outgoing beams (2, 3),
The other delivery motor (7) is rotated synchronously with the actual rotation amount of the one delivery motor (6) at a rotation amount of the predetermined ratio (k), and a drive signal (A) from a tension control circuit (17) is provided. And two delivery beams (2, 3)
A predetermined ratio (k) given on the basis of the winding diameter ratio, the other delivery motor (7) follows the correction signal (E) obtained by multiplying the drive signal (A) by the predetermined ratio (k). A two-beam feeding control device (10), comprising: a synchronization controller (12) for rotating.