JP2007126784A - Tape-like weft yarn feed device for loom - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for efficiently weaving a hard and brittle tape-like yarn such as a carbon fiber and the like by rapier loom. <P>SOLUTION: A weft yarn storing portion was removed by synchronously driving a yarn feed reel unit with timing and length in which a rapier requires the weft yarn to remove a long loop portion having ≥1 pick. A wound diameter is calculated from wound diameter data of the feed reel and rotation informations of the loom and the feed reel, the amount of movement of the weft yarn is calculated from encoder signals of the rapier drive unit and the weft yarn is delivered by synchronously driving the feed reel by servomotor. The synchronous rate operation must be controlled by tension for a yarn having no stretch such as a carbon fiber and the like. The delivery tension is detected by tension roller and added as a corrective signal and changed to a tension control system. In addition, when the delivery tension and the weft tension are required to be individually set, the feed roll unit is inserted between the delivery unit and the weft insertion unit. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an improvement of a tape-like weft feeding device for a repia loom.

As a conventional technique, a tape-shaped weft feed reel is rotated in conjunction with the operation of the loom, and a position control using a dancer roller in a loop form between the feed reel portion and the gripper gripping the weft by a reel roller is used. More than picks were stored, and rapid horizontal insertion by the Repia drive was supported.

The control method using a dancer roller has poor responsiveness, and it has been necessary to store the weft yarn in a loop shape between the feed reel and the gripper for a length of one pick or more. For this reason, a twist occurred in the weft at the loop portion, and the quality of the produced fabric was deteriorated. In addition, due to the rapid horizontal insertion during the horizontal insertion period, the tension increases due to the sudden rise of the dancer roller, and weaving of the weft on the feed reel and thread pull-out from the repeater occur, making it impossible to increase the rotation speed of the loom. There were problems with fabric quality and productivity.

In the present invention, the delivery reel is driven by a servo motor, and the position information of the repeater drive portion is taken out by attaching an absolute encoder to the rotation shaft of the repeater drive portion, and this information and the delivery reel diameter are determined by the number of revolutions of the loom and the delivery reel. Calculated from the number of rotations, the rotation of the feeding reel and the refilling speed of the repier were operated at a synchronous ratio, the dancer roller control was abolished, and the loop storage part was eliminated.

In addition, a tension setting section using a guide roll and a tension roller is provided between the feed reel and the feed roll, and between the feed roll and the gripper, so that the weft releasing tension from the feed reel can be set. Furthermore, the tension setting part between the feed roll and the gripper is set to the tension setting provided between the feed roll and the gripper when the reper approaches the gripper part, grips the weft and starts to place the gripper part. The part functions as a transverse insertion tension.

The long loop part disappeared, the weft tension was stabilized, and the loom was able to rotate at high speed. Also, since the release tension from the delivery reel can be set, the weft can be smoothly wound and the weft can be smoothly unwound and the weft can be smoothly released. The tension can be set during the horizontal insertion period, the yarn from the repeater during the horizontal insertion period is eliminated, and the operating rate of the loom is improved.

FIG. 1 is a side view of the present invention. The tape-shaped weft 2 wound around the delivery reel 1 passes through the guide roll 3a and the guide roll 3b. At this time, there is a tension roller 4 between the guide roll 3a and the guide roll 3b, and tension is given to the weft 2 by the positional relationship between the weight of the tension roller 4 and the guide roll 3a and the guide roll 3b. The position of the tension roller 4 is detected by a position detector 14 attached to the lower side between the guide roll 3a and the guide roll 3b, and kept at a fixed position by a control method described later. The tension can be set by the weight of the tension roller 4 and the position between the guide roll 3a and the guide roll 3b.

Delivery of the weft 2 from the delivery reel 1 is performed by rotation of a delivery motor M1 mechanically connected to the delivery reel 1, and is performed in synchronization with the transverse insertion timing of the repeater 10.
Further, the weft 2 passes through the portion nipped between the feed roll 5 and the pushing roll 6 and passes through the guide roll 3c, the tension roller 7 and the guide roll 3d.

At this time, the tension can be set by the weight of the tension roller 7 and the position setting between the guide roll 3c and the guide roll 3d in the same manner as described above. The roller 7 is controlled. The feed roll 5 is mechanically connected to the feed motor M2 and is driven in synchronism with the weft insertion timing of the repeater 10. Since the weft 2 is nipped between the feed roll 5 and the pushing roll 6 and passes through this portion, it is possible to give separate stretches or tensions before and after.

The weft yarn 2 is fixed between the gripper fixing portion 9 and the gripper driving portion 8 at a timing when the weaving machine is not inserted, and the repeater 10 enters and grips the weft yarn 2. When the replier 10 starts moving backward while gripping the weft thread 2, the gripper driving unit 8 operates to release the weft thread 2 from a state where it is fixed between the gripper fixing unit 9 and the gripper driving unit 8. The timing control of the gripper driving unit 8 is performed by an encoder signal attached to the crankshaft of the loom main body (not shown).

The repeater 10 is attached to the tip of the repeater band 11, and the repeater band 11 is mechanically connected to the repeater band driving wheel 12. Here, the repeater band drive wheel 12 is mechanically connected to the repeater band drive motor M3. However, in general, the repeater band drive wheel 12 is often driven by a special cam from the drive portion of the loom body.

The apparatus using the repeater band drive motor M3 shown here is driven at a timing required for lateral insertion through a servo amplifier (not shown) by an encoder signal attached to the crankshaft of the loom body. An absolute encoder 13 is mechanically connected to the repeater band drive wheel 12 to extract accurate position information of the repeater 10.

When the repeater 10 moves backward due to the reverse rotation of the repeater band drive motor M3 and the drawing of the weft yarn 2 between the warp yarns (not shown) is completed, the opening portion (not shown) becomes the cross timing, and the warp yarn is caught between the warp yarns 2, The opening portion operates and the weft 2 is released from the repeater 10. On the other hand, the gripper drive unit 8 operates in accordance with the encoder signal attached to the loom main body described above to fix the weft 2, and a cutter (not shown) operates to move the fixed weft 2 to the warp side. The weft thread 2 portion that has been horizontally inserted is cut to complete the horizontal insertion.

The control operation will be described with reference to FIG. 2. The ratio of the synchronization ratio with the feed motor M1 and the feed motor M2, which is operated with the absolute encoder 13 that detects the position of the repeater 10 by the setting device 16, and the feed reel 1 Winding diameter data etc. are set. When an operation signal is received from the loom, the controller 17 enters an operating state, and the position information of the repeater 10 is input from the absolute encoder 13 and is synchronized with the servo amplifier 18 and the servo amplifier 20 at the timing required for insertion. Output signal required for ratio operation.

A feed motor M1 is electrically connected to the servo amplifier 18, and a feed motor M1 is electrically connected to the servo amplifier 20. An encoder 19 is mechanically connected to the feed motor M1, and an encoder 21 is connected to the feed motor M2. The encoder 19 is electrically connected to the servo amplifier 18 and the controller 17, and the rotation signal of the feed motor M1 is fed back, and this signal is used as a feedback signal of the synchronization ratio in addition to the stable rotation of the feed motor M1.

The diameter of the delivery reel 1 is calculated from the signals of the encoder 19 and the absolute encoder 13, and the winding diameter of the delivery reel 1, which is initially set by the setting device 16, is recalculated, and the synchronization ratio corresponding to the change in the winding diameter Calculate. Further, the position information of the tension roller 4 is detected by the position detector 14, the calculated value of the synchronization ratio is corrected, and the feed motor M1 is controlled through the servo amplifier 18.

This control method is based on synchronous ratio operation with quick response as a minor loop, and the main loop is a method in which tension control necessary for the weft 2 is corrected to synchronous ratio operation. Therefore, both stabilization of the control loop and high accuracy are achieved, and it is suitable for controlling yarn with less stretch.

Similarly, the feed motor M2 has a constant position from the guide roll 3c and the guide roll 3d with respect to the tension roller 7 by a signal from the position detector 15 with respect to the synchronous ratio operation by the signals of the encoder 21 and the absolute encoder 13. Correct as follows. Therefore, here also, the synchronous ratio operation is performed as the minor loop, and the tension control is performed as the main loop.

In the above description, the tension roller position control has been described as the tension setting method. However, a method of biasing the tension roller with a spring or a tension control method by attaching a load cell to the support portion can be considered. For convenience of explanation, the explanation has been made with the one-sided repeater loom, but the operation can be similarly performed with the double-sided repeater loom.

When there is no problem even if the feeding tension from the feeding reel 1 and the weft tension by the repeater 10 are almost equal due to the characteristics of the weft 2, such as the presence or absence of the weft 2, the hardness, etc., the feed roll The part can be omitted. For stretched yarns with better stretch control than tension control, the purpose of weft feeding without the long loop portion can be achieved only by the synchronous ratio operation of the feeding reel 1.

As a feeding device for a press or a cutting machine that intermittently feeds a material wound on a reel, it can be used as a high-speed and stable feeding device with almost no slack portion.

It is a side view of the present invention. It is an electrical simple connection diagram of the present invention.

Explanation of symbols

1 Feed reel 2 Weft 3a, 3b Guide roll
3c, 3d guide roll
4 Weight Roller 5 Feed Roll 6 Pushing Roll 7 Weight Roller 8 Gripper Drive 9 Gripper Fixing 10 Repeater 11 Repeater Band 12 Repeater Band Drive Wheel 13 Absolute Encoder 14 Position Detector 15 Position Detector 16 Setter 17 Controller 18 Servo Amplifier 19 Encoder 20 Servo amplifier 21 Encoder M1 Feed motor M2 Feed motor M3 Repia band drive motor

Claims (3)

In the weft delivery device of the Repia loom, the feed reel on which the tape-like weft is wound is mechanically connected to the servo motor, and the weft yarn is stretched and controlled at the weft insertion speed and synchronization ratio during the weeping period of the Repia. How to send in. 2. The method according to claim 1, wherein the feed tension is detected by detecting the position of the tension roller, etc., the stretch control by the synchronous ratio operation is corrected by the tension, and the feed control is operated as a tension control system. 3. The apparatus according to claim 2, wherein a feed roll is opened between the delivery reel and the repeater, the feed roll is operated in a synchronous ratio with a feeding period of the repeater, a tension between the feed roll and the repeater is detected, and stretch control is performed by the synchronous ratio operation. A device that can adjust the feeding tension and the weft insertion tension separately.

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