JPS62199846A - Method and apparatus for automatically setting arrival timing of wefting device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a fluid jet type 11 m weft inserting device, and more particularly to a method and device for automatically setting the arrival timing of the weft thread at the initial stage of operation of a loom.

Conventionally, when changing weaving conditions, the weft arrival timing was set by observing the flying state of the weft using a stroboscope while the loom was in operation, or by using a weft arrival sensor at the weft end on the opposite yarn feeding side. This is done by measuring the arrival point, digitally displaying the measurement results, and manually adjusting the pressure setting of the horizontal insertion nozzle. With such a zero setting method, it takes a lot of time to make adjustments, and it is difficult to make appropriate settings (
There are also variations among individual looms, which makes it difficult to operate the looms with high efficiency and to weave high-quality collared garments.

On the other hand, JP-A-56-96938 and JP-A-56-1
The invention of No. 07046 shows that the arrival timing of the weft yarn is controlled to the target arrival timing by changing the pressure of the weft insertion fluid or the rotational speed of the loom. However, these inventions all involve control of a loom while it is in operation. Therefore, when the weaving conditions change, the wefting conditions such as the pressure of the pressure fluid are set based on past experience in the early stages of operation of the loom or the above-mentioned stroboscope method.

Further, in the above invention, if the controllable range is set to be large, the arrival timing of the weft thread will be automatically adjusted in the process of automatic control after the loom is started, regardless of its value. However, if the control range is wide (if it is set, the control state will become transiently unstable during the control process, and the deviation amount will also become large in the subsequent weaving stage), so accurate control within the target range is impossible. It becomes difficult.

OBJECTS OF THE INVENTION Accordingly, an object of the present invention is to automatically set weft insertion conditions so as to reach a target timing when changing weaving conditions, and to
The aim is to quickly respond to changes in weaving conditions during high-mix, low-volume production operations and to stabilize the quality of woven products by stabilizing weft insertion during subsequent weaving.

SUMMARY OF THE INVENTION Therefore, the present invention sequentially changes the weft insertion conditions at the trial weft insertion stage after setting new weaving conditions or changing different weaving conditions, and determines the actual arrival timing for each weft insertion condition. is measured, and the weft insertion conditions and arrival timings are stored in correspondence, and appropriate weft insertion conditions corresponding to the target arrival timing are calculated from the stored results. In the subsequent weaving operation, the wefting device performs the wefting movement under the calculated appropriate wefting conditions.

Here, the weft insertion condition is mainly the pressure value of the pressure fluid for weft insertion, but it may also be the injection start timing and injection end timing of the weft insertion nozzle, or a combination thereof, that is, the pressure value and the start of injection.・
It may be the end timing.

This weft insertion device is also used for multi-colored weft insertion. In that case, at the stage of trial weft insertion, each weft insertion condition and the arrival timing under that weft insertion condition are identified and stored for each type of selected weft thread. Therefore, even in the case of multi-colored weft insertion, appropriate weft insertion conditions are automatically set for each weft thread.

Structure of the Invention FIG. 1 shows the automatic arrival timing setting bag M20 of the present invention in relation to the horizontal loading control device 1 to be controlled.

The weft insertion device 1 is equipped with a weft insertion nozzle 5 for wefting the weft thread 2 together with a pressure fluid 3 into a vertical unopened space 4 . The weft yarn 2 is supplied by a yarn feeder 6 and guided into a rotating yarn guide 8 via a balloon guide 7.

The rotating yarn guide 8 measures the length while winding it around the outer periphery of the drum 9 by rotating relative to the length measurement storage drum 9, and stores it until the time of weaving. On the outer periphery of this drum 9, the weft yarn 2 is locked by a locking pin 10 during length measurement storage. The locking pin 10 is driven by an actuator 11 and moves back at the weft insertion timing, thereby unwinding the stored weft yarn 2 on the outer peripheral surface of the drum 9, and passing it through the yarn guide 12 to the weft insertion nozzle. 5, it becomes ready for horizontal insertion. On the other hand, the pressure fluid 3 is supplied from the pressure fluid source 1
3, and reaches the horizontal injection nozzle 5 through a pressure control valve 15, a pressure accumulation tank 16, and an on-off valve 17 in a pipe line 14. After the weft yarn 2 is wefted into the warp unopened 4 along with the pressure fluid 3 by the weft insertion nozzle 5,
It is driven in by a reed 18 and becomes a woven fabric 19.

The arrival timing automatic setting device 20 of the present invention includes:
On the input side, horizontal insertion condition command device 21, arrival sensor 22
, a storage device 25 connected to the rotation angle detector 23 and the weft selection command device 24, an arithmetic unit 27 connected to the storage device 25 and the target setter 26 on the input side; It consists of a controller 28 connected to the weft insertion condition command device 21 and connected to the above-mentioned pressure control valve 15 on the output side. Note that this controller 28 is also connected to the on-off valve 17.

Effect of the invention First, at the stage of trial weft insertion, the weft insertion condition command unit 21
is, for example, the pressure value pI of the pressure fluid 3 for each rotation of the m machine
, p2 . . . p7 are generated and sent to the controller 28 in order to sequentially change them within a predetermined range. Therefore, this controller 28 operates the pressure control valve 15 proportionally to sequentially change the pressure of the pressure fluid 3 from the pressure fluid source 13. Note that this controller 28 is synchronized with the rotation angle θ of the loom,
The timing θ between the on-off valve 17. and closing timing θ.

is also controlled. In this example, the opening/closing timing is
Always set constant.

Therefore, the weft insertion nozzle 5 warps the weft yarn 2 into the unopened hole 4 at different pressure values p+, I)z, . . . p7 each time the weft insertion is performed.

On the other hand, the arrival sensor 22 detects the actual arrival timings θ1, θ2 of the weft yarn 2 that has been inserted at a predetermined position, for example, a position corresponding to the weaving width on the anti-yarn feeding side during trial weft insertion.
...θ. is being detected. At this stage of trial weft insertion, the memory 25 stores the pressure values p+, I)z...pn from the weft insertion condition command unit 24 and the corresponding actual arrival timings θ3, θ2...θ7. are sequentially stored in relation to the rotation angle θ of the loom. Furthermore, when the weft thread is multi-colored, the memory device 25 stores the weft selection command device 2
Based on the selection signal from 4, the pressure value 'DI-, pz . . . are memorized in sequence.

Further, the number of times of such trial weft insertion is determined by the required control accuracy. Such pressure values p1, p2
・Actual arrival timing θ0, θ2 for p7 ・
The relationship between changes in θ is expressed, for example, as an inversely proportional linear graph, as shown in FIG.

Further, the target arrival timing e is input in advance to the calculator 27 by the target setting device 26 by the operator, and after the completion of the trial weft insertion as described above, the calculator 27 calculates the timing e calculated at the stage of the trial weft insertion. Actual arrival timing θ1, θ2...θ7 and pressure value pl of pressure fluid 3
, p2 ... p7, the pressure value P corresponding to the target arrival timing θ is determined directly or by performing interpolation calculation.
is determined and output to the controller 28. Therefore, the controller 28 controls the pressure control valve 1 based on the given target pressure value P.
5 to automatically set the pressure fluid 3 to the target pressure value P. At this stage, the horizontal insertion condition command unit 2
1 is in a dormant state.

In this way, the pressure of the pressure fluid 3 is automatically set before the actual weaving. Therefore, during the subsequent operation of the loom, the wefting device 1 receives the pressure fluid 3 at the target pressure value P.
Accordingly, a regular horizontal inserting operation is performed.

In addition, in the above embodiment, the pressure value is changed every time the weft is inserted,
The corresponding arrival timing is memorized, but a more accurate relationship can be obtained by changing the pressure value every predetermined number of weft strokes and sequentially storing the average value of the obtained arrival timing. .

Other Embodiments In the above embodiment, only the pressure of the pressure fluid 3 is used as the controlled variable as the weft insertion condition. Therefore, the control target of the controller 28 may be the on-off valve 17.

In FIG. 3, the pressure value of the pressure fluid 3 is constant, and the horizontal insertion nozzle 5. injection start timing, that is, the opening timing θ of the on-off valve 17. Yes θ. 2. When changing θo7, change the actual arrival timing θ1, θ2...θ7 to the target arrival timing θ and appropriate opening timing θ
. It is shown with

Note that in this graph, the opening time of the on-off valve 17 is constant for convenience.

As will be understood from this embodiment, the weft insertion conditions are not limited to the pressure of the pressure fluid 3, but may also be the weft insertion start timing and end timing, and furthermore, the weft insertion conditions may be the weft insertion start timing and end timing. May be combined.

In addition, the patent applicant proposed the patent application No. 60-22644 as an effective control method when controlling the pressure of the pressure fluid 3 and the start and end timing of injection at the same time.
He has already proposed invention No. 9. In the invention, pressure control and timing control are performed either alternatively or simultaneously according to changes in the diameter of the yarn supplying body 6.

Further, the arrival timing automatic setting device 20 of the present invention is shown in functional blocks for convenience of explanation, but each of these parts is configured as a part of a control computer, and also in the field of the computer program. Can be executed.

Effects of the Invention In the present invention, at the stage of trial weft insertion, changes in the actual arrival timing with respect to changes in the pressure of the weft insertion pressure fluid and the injection timing of the weft insertion nozzle are determined as the weft insertion conditions, and based on this, Appropriate horizontal insertion conditions for the timing of reaching the target are automatically set,
When the weaving conditions are newly set or changed, the optimal wefting conditions for the changed weaving conditions can be quickly set before the regular operation of the 'fi machine.

In addition, since appropriate weft insertion conditions are set in advance at this trial weft insertion stage, even when the arrival timing is automatically controlled while the loom is in operation, there is less need for variation in the control amount. A temporary unstable state at the initial stage of startup can be avoided, and the subsequent control amount is also reduced, making automatic control possible with high precision.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the mechanical configuration of the weft insertion control device and the automatic arrival timing setting device of the present invention, FIG. 2 is a graph of the relationship between pressure value and actual arrival timing, and FIG. It is a graph of the relationship between injection start timing and actual arrival timing in Example. 1. Weft insertion device, 2. Weft thread, 3. Pressure fluid,
4. Warp opening, 5. Weft insertion nozzle, 6. Yarn feeder, 13. Pressure fluid source, 15. Pressure control valve, 17.
- Opening/closing valve, 20... Arrival timing automatic setting device, 21
... Horizontal insertion condition command device, 22 ... Arrival sensor, 23
・・Rotation angle detector, 24・・Weft thread selection command device, 25・
- Memory device, 26... Goal setting device, 27... Arithmetic unit, 28
...Controller. Patent Applicant Tsudakoma Kogyo Co., Ltd. Representative Patent Attorney Kunio Nakagawa No. 7 Figure 2 Pressure --- Opening timing □ Procedural author's letter (spontaneous) January 20, 1988 Commissioner of the Japan Patent Office Black 1) Akira tijl 1
, Indication of the case 1985 Patent Application No. 039653 2, Title of the invention Method for automatically setting the arrival timing of a horizontal insertion device and its device 3, Person making the amendment Relationship with the case Patent applicant address 5 Nomachi, Kanazawa City, Ishikawa Prefecture Chome 18-18 Name
Tsudakoma Kogyo Co., Ltd. Representative Heiji Etsuma 4, Agent ◎160 6, Subject of amendment Detailed explanation of the invention in the specification column d51
,゛・7. Contents of amendment +11 The following sentence is added between page 13, line 16 and line 17 of the specification. "Furthermore, the control target is not limited to the weft insertion nozzle 5 on the yarn feeding side, but also a group of auxiliary weft insertion nozzles arranged along the flying path in order to energize the flying weft yarn 2. That's all.

Claims (7)

[Claims] (1) In a weft insertion device that inserts the weft yarn into the warp opening using the pulling force of a nozzle, there is a command process in which the weft insertion conditions are sequentially changed during the trial weft insertion stage, and when the weft yarn reaches a predetermined position during the trial weft insertion. a detection process that detects the arrival timing of the weft, a memory process that memorizes the relationship between the arrival timing of the weft thread and changes in weft insertion conditions during trial weaving, a setting process that sets the target arrival timing during regular weaving, and A calculation process that calculates appropriate weft insertion conditions corresponding to the target arrival timing based on the relationship between the arrival timing during weft insertion and changes in the weft insertion conditions, and the above-mentioned weft insertion using the optimal weft insertion conditions found in this calculation process. 1. A method for automatically setting the arrival timing of a weft insertion device, the method comprising the step of controlling the weft insertion conditions of a nozzle. (2) The weft insertion condition according to claim 1, wherein the weft insertion condition is at least one of the pressure value of the weft insertion pressure fluid, the injection start timing of the weft insertion nozzle, and the end timing. How to automatically set the arrival timing of the loading device. (3) Automatic arrival timing setting of the weft insertion device according to claim 1 or 2, characterized in that in the storage process, the arrival timing of the weft thread is stored for each type of weft thread in correspondence with the selection of the weft thread. Method. (4) In a weft insertion device that inserts the weft yarn into the warp opening by the traction force of the weft insertion nozzle after measuring and storing the length, there is a weft insertion condition command device that sequentially outputs different weft insertion conditions, and a weft insertion condition command based on the weft insertion condition command. a controller that controls the supply of pressurized fluid for weft insertion from a pressure fluid source to the weft insertion nozzle, an arrival sensor that detects the arrival timing of the weft inserted, and a controller that controls the arrival timing from the arrival sensor and the above-mentioned weft. A memory device that sequentially stores the weft feeding conditions from the weaving condition command device, a setting device that sets the timing to reach the target during weaving, and an optimal weft that corresponds to the timing to reach the target set by this goal setting device. Automatic arrival timing setting of a weft insertion device, characterized in that it is equipped with an arithmetic unit that calculates the insertion condition from the relationship between the arrival timing stored in the storage device and the change in the weft insertion condition, and outputs the calculated result to the controller. Device. (5) The arrival timing of the weft insertion device according to claim 4, wherein the controller controls a pressure control valve interposed between the pressure fluid source and the weft insertion nozzle as the weft insertion condition. Automatic configuration device. (6) The weft insertion device according to claim 4, wherein the controller controls the opening/closing timing of an on-off valve interposed between the pressure fluid source and the weft insertion nozzle as a weft insertion condition. Arrival timing automatic setting device. (7) An automatic arrival timing setting device for a weft insertion device, wherein the storage device is linked to a weft selection signal from a weft selection command device and stores arrival timing and weft insertion conditions for each type of weft yarn.