JP2003221747A - Control method for electric lug assembly device of fluid jet loom - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In an electric ear assembly device 3, an ear thread 17 is closed at an optimum closing timing according to a flying state of a weft 2. A sensor (a first unwinding sensor 25, a second unwinding sensor 26, a weft insertion sensor 27, a weft sensor 44, a weft sensor 4) detects a timing at which a weft 2 passes a predetermined position.
5), a detection signal is generated, and the electric ear assembly device 3 is driven based on the detection signal to cause the ear thread 17 to close, and the ear thread 17 to grip the weft.
The weft 2 is surely gripped at the earliest possible timing without hindering the flight of the weft 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for an electric selvedge device of a fluid jet loom, in which the weft yarn inserted into the weft yarn is gripped by the selvage yarn in accordance with the passage timing of the weft yarn inserted into the weft yarn. .

[0002]

2. Description of the Related Art Japanese Patent No. 2933889 discloses a twist ear forming method using a twist ear forming device. The twist selvage forming method is that a twist selvage forming device is provided on each of the weft supply side and the non-feed side of the weft, and each servo motor of the twist selvage forming device is driven independently of the drive control of the loom. By controlling the rotation speed (rotation speed) of
The twisting yarn shedding motion is synchronized with the shedding motion of the loom.

Generally, since the unwinding resistance of the weft varies depending on the winding diameter of the yarn feeder and the unwinding position of the weft from the yarn feeder, the weft measuring and storing device has different weft tensions. It is wound on different drums and wound with different hardness. As a result, when the weft is unwound from the drum of the weft measuring and storing device during weft insertion, the unwinding tension of the weft changes, so that the weft flying state (flying speed) changes during weft insertion. In addition, in the case of multicolor weft insertion, the flying state (flying speed) of the weft changes due to the characteristics peculiar to the yarn type due to variations in the weft yarn type, the jet fluid pressure for weft insertion, and the like.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The 933889 technique synchronizes the twist yarn shedding movement with the shedding movement of the loom. However, due to the reasons described above, the flying state (flying speed) of the weft thread constantly changes, so that the selvage yarn closes in synchronization with the shedding motion of the loom, and when the selvage yarn grips the weft thread, weft insertion is performed. The arrival position of the weft thread is
It is constantly different for each weft insertion. If the weft flying speed is slow and the selvage closing timing is too early, the selvage will obstruct the weft flying due to the closed state, and conversely, the weft flying speed will be fast and the selvage closing If the timing is too late, the weft grip is delayed and the weft is loosened, so that the ears of the woven fabric become loose and do not become tight ears.

Accordingly, an object of the present invention is to close the selvage yarns at the optimum closing timing in the electric selvedge device on the weft yarn feeding side and the non-weft yarn feeding side according to the flying state of the weft yarns. By performing the weft holding operation with the thread,
The purpose is to prevent the weft from flying and to prevent the weft from loosening so that a tight ear can be formed at the end of the woven fabric.

[0006]

To achieve the above object, the present invention detects the passage of a weft inserted in a predetermined position by a sensor, and drives an electric selvage assembly device based on the detection signal of the sensor. Then, the selvage yarn is closed and the weft yarn is gripped by the selvage yarn. As described above, according to the method of the present invention, the actual running state of the weft yarn is detected and the closing operation of the selvage yarn is performed, so that the weft yarn is not obstructed and the weft yarn is gripped at the earliest possible timing. As a result, according to the method of the present invention, weft slack can be reliably prevented without hindering the weft flying.

More specifically, a method for controlling an electric selvedge device of a fluid jet loom according to a first aspect of the present invention is a fluid jet loom, wherein at least one of a weft yarn feeding side and a weft yarn feeding side is electrically driven. With the selvedge device arranged, in the electric selvage device of the fluid jet loom that independently drives the electric selvedge device, the sensor detects the passage time of the weft yarn at a predetermined position,
The electric selvedge device is driven based on the detection signal of this sensor to close the selvage yarn, and the weft yarn is gripped by these selvage yarns.

Even when the flight speed of the weft changes and the time when the weft reaches the position where it is gripped by the electric selvedge device changes, when the weft reaches a predetermined position, the sensor detects the time when the weft reaches the predetermined position. Therefore, the weft inserted is
It is always gripped by the selvage when it reaches the optimum position. Also,
The weft is gripped by the selvage when it reaches the optimum position,
The running of the weft is not hindered by the presence of the selvage or the gripping operation of the selvage, and the closing operation of the selvage is performed at the earliest possible timing, so that the weft is gripped by the selvage before it is loosened. Therefore, the weft slack can be reliably prevented by gripping with the selvage. In the closing operation of the selvage yarn on the yarn feeding side, the selvage yarn grips the weft yarn, and it is possible to prevent the weft yarn from loosening on the yarn feeding side due to the inward return of the weft yarn when cutting with the cutter, and In the closing operation, the selvage yarn holds the weft thread and prevents weft thread slack on the anti-feeding side when closing the warp opening or when hitting the reed, thereby providing alternative functions such as the weft brake device and stretch nozzle. it can.

According to a second aspect of the present invention, there is provided a method for controlling an electric reassembling device for a fluid-jet loom, wherein the electric selvedge device is driven after a predetermined time has elapsed from the output of the detection signal of the sensor that detects passage of the weft at a predetermined position. And The predetermined time is set on the time or on the rotation angle of the loom spindle, and is determined according to the predetermined position.Therefore, if the predetermined position is set so that the predetermined time is shortened, the error is reduced accordingly. The weft can be gripped at the optimum position. The specified time is 0
The electric ear assembly device may be driven simultaneously with the output of the detection signal.

According to a third aspect of the present invention, there is provided a method for controlling an electric selvedge device of a fluid jet loom, in which the weft flying speed related information is obtained based on the detection signal of the sensor, and the drive timing is determined according to the flying speed related information. Is determined and the electric ear assembly device is driven. As the flight speed-related information, the time required for the weft to fly between two points including the predetermined position where the weft passage is detected by the sensor (rotation angle of the main shaft) or the flight speed, the rotation angle of the main shaft when passing the predetermined position, and the like. There are times and so on.

As a method of determining the drive timing in accordance with the flight speed related information, a reference drive timing (reference spindle rotation angle or time) is set, and the reference drive timing is changed according to the change in the flight speed related information. There is a method of correcting and changing the driving time. Specifically, a reference value is set, and the change is grasped by comparing the reference value with information. If it is faster than the standard, advance the drive time, if it is later than the standard, delay the drive time,
The weft grip is always opened when the tip of the weft reaches the optimum position. There is also a method of setting a specific time, starting driving after a predetermined period (rotation angle or time of the spindle) from the specific time, and changing the predetermined period according to the flight speed related information. As the specific time, a set time (for example, a rotation angle of the spindle of 0 ° or 1
It is set to 50 ° or the weft passage detection timing of the sensor.
To change the predetermined period, specifically, the predetermined period is calculated from the flight speed related information, or the predetermined period of each species is set in advance corresponding to the flight speed related information value, and selected according to the information value. .

According to a fourth aspect of the present invention, there is provided a method for controlling an electric selvedge device of a fluid jet loom, wherein the electric selvage device is arranged on each of a yarn supplying side and a non- yarn supplying side, and the yarn supplying operation is performed based on a detection signal of a sensor. Close the ear yarns of both the electric side selvedge device on the side and the electric selvage unit on the side opposite to the yarn supplying side, and make the selvage yarn on the yarn supplying side earlier than the selvage yarn on the opposite side and the weft yarn side. The closing operation is performed before the end of the woven fabric is reached. With this configuration,
Before the weft reaches the end of the fabric on the non-feed side, the weft is gripped by the selvage yarn on the feed side, and this grip brakes the flight of the weft, reducing the speed of the weft. The weft yarn is grasped on the yarn supplying side by the locking member and stops the flight. As a result, the weft insertion operation is stopped in the state where the weft flying speed is reduced, so that over tension is applied to the weft, and the weft is not cut or the quality of the fabric is not impaired.

According to a fifth aspect of the present invention, there is provided a method for controlling an electric selvedge device of a fluid jet loom, which is a fluid jet loom having a plurality of weft insertion nozzles, wherein the selvage yarn is detected based on a detection signal from a sensor and a weft thread type signal. Weft yarns that have low frictional resistance to the yarns are gripped quickly by the selvage yarns, and conversely weft yarns that have high frictional resistances to the selvage yarns are gripped slowly. Since the weft yarn is held after it has sufficiently run, the weft yarn is not obstructed by the selvage yarn.

According to a sixth aspect of the present invention, there is provided a method for controlling an electric selvedge device of a fluid jet loom, wherein the electric selvage device is arranged on each of the yarn supplying side and the anti-filament side, and the yarn supplying side is determined based on one detection signal. The electric ear-assembling device and the electric selvage-assembling device on the side opposite to the yarn feeding are closed. This allows the operation of the binaural device to be controlled by a single sensor rather than separate sensors.

A method of controlling an electric selvedge device of a fluid jet loom according to a seventh aspect of the present invention is characterized in that a tip of the weft is detected to detect a passage timing of the weft at a predetermined position.

In the control method for the electric selvedge device of the fluid jet loom according to the present invention, the weft amount unwound from the weft measuring and storing device is measured to detect the passage time of the weft at a predetermined position. It is characterized by

According to a ninth aspect of the present invention, there is provided a method for controlling an electric selvedge device of a fluid jet type loom, wherein a sensor provided at an end of the woven fabric on the non-feeding side detects a predetermined position of the weft, and the next weaving is performed. It is characterized by performing the closing operation of the electric ear assembly in a cycle. As a result, it is possible to control the closing operation of the ear device without providing a dedicated sensor.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1, 2, 3, 4 and 5 show an example of a multi-color weft insert in a two-color weft insert air-jet loom 1 in which a weft yarn 2 is fed to It shows a mode in which the electric selvage assembly devices 3 are respectively arranged on the non-feeding side.

First, in FIG. 1, a two-color weft-inserting air jet loom 1 has two weft measuring and storing devices 5 and weft inserting nozzles 6 corresponding to two kinds of wefts 2. Each of the weft yarns 2 is pulled out from one of the two yarn feeders 7 which are knotted, and reaches the weft yarn length measuring and storing device 5 via a balloon breaker 8 and a tenser 9. Each of the weft measuring and storing devices 5 locks the weft 2 on the outer peripheral surface of the drum 11 by the locking pin 12 while rotating the rotary arm 1
By rotating 0, the weft 2 is wound around the outer peripheral surface of the drum 11, and the weft 2 having a length required for one weft insertion is stored in the drum 11.

At the time of weft insertion, when the operating device 13 retracts the locking pin 12 from the outer peripheral surface of the drum 11 to unwind the weft yarn 2, the weft insertion nozzle 6 causes the unwound yarn 2 to unwind.
4 is drawn into the weft insertion nozzle 6 and jetted with a weft insertion fluid (air) to cause the selected weft yarn 2 to enter the opening 16 of the warp yarn 15 in the opening 16 of the warp yarn 15 and the electric selvedge device 3 on the yarn feeding side and the anti-feeding side. The weft insertion is carried out into the opening 18 of the selvage yarn 17, such as leno selvage yarn. The weft yarn 2 put in the weft is urged by a large number of sub-nozzles 4 and flies through the openings 16 and 18, and then reed 21
Thus, the woven cloth 22 is beaten on the cloth cloth 23 and cut by the yarn supplying cutter 24 at the yarn end on the yarn supplying side.

When the weft yarn 2 is unwound, the unwinding state (the unwinding number) of the weft yarn 2 is detected by the first unwinding sensor 25 and the second unwinding sensor 26. The first unwinding sensor 25 and the second unwinding sensor 26 are arranged on the diameter line of the drum 11 so as to face each other, detect the unwound wefts 2, and detect a total of two unwinding for each unwinding. Generate a signal.

During weft insertion, the weft insertion state of the weft yarn 2 (the state in which the weft yarn 2 reaches the unwoven yarn side cloth edge) is detected by the weft inserting sensor 27 at the anti-feed yarn side cloth edge. When the weft insertion sensor 27 detects the front end of the weft yarn 2 which has been normally inserted at the position where the weft yarn 2 reaches at the weft end on the non-feeding side, a weft signal of a certain level is generated and weaving is continued. When the leading edge of the weft 2 cannot be detected due to a weft insertion error, a weft insertion error signal is generated and sent to the main controller 40, which will be described later, to cause the air jet loom 1 to stop.

Each of the electric selvedge units 3 is independently driven in synchronization with the air jet loom 1 by the selvage group control device 20 to open / close the selvage yarns 17 of the electric selvage units 3. The weft-inserted weft 2 is gripped at the yarn supplying side and the opposite yarn supplying side to form an ear tissue.

2 and 3 show an electric selvage unit 3 on the anti-feeding side as a representative example of the electric selvage units 3 on the yarn supplying side and the anti- yarn supplying side. The electric yarn assembling device 3 on the yarn supplying side and the electric yarn assembling device 3 on the opposite yarn supplying side are both the same, and are configured as an electric leno device as an example. Through the balloon breaker 28, the tensor 29, and the thread guide 30 and into the thread guide hole 34a of the axis of the rotary shaft 34 of the motor rotor 33. The motor 32 of the electric selvedge device 3 is integrated with the rotary shaft 34 of the motor rotor 33 in a state of being synchronized with the air jet loom 1, and by rotating the rotary arm 31 facing the rotary shaft 34 with the rotary shaft 34 interposed therebetween. The two selvages 17 form a Reno ear tissue (Reno ear tissue).

The two selvage yarns 17 are provided in the yarn guide hole 3 of the rotary shaft 34.
4a is divided on the outlet side, comes out from the yarn guide hole 31a at each tip of the rotary arm 31, passes between the two guide pins 35,
Weave 23 has been reached. The rotating arm 31 is formed of a thin metal plate and has flexibility. Further, the two guide pins 35 are held by the guide pin holder 36, and the two selvage yarns 17 are passed between them,
The position in the weaving width direction is regulated while permitting the opening movement of the selvage yarn 17. When the direction of the rotating arm 31 is perpendicular to the surface of the woven fabric 22, the two selvage yarns 17 are connected to the maximum opening 1
8 is formed, and when the rotary arm 31 rotates and its direction becomes parallel to the surface of the woven fabric 22, the two selvage yarns 1
7 closes the opening 18 to be in a closed state.

FIG. 4 shows the connection between the ear-set control device 20 and other circuit elements. On the input side, the selvage set controller 20 receives a rotation angle signal of the spindle 37 from an encoder 38 connected to the spindle 37 of the loom, a control signal / weft type signal from the main controller 40, and a weft yarn from a setter 39. The signal of the delayed rotation angle for each species, the count-up signal from the counters 41 and 42 connected to the first unwinding sensor 25 and the second unwinding sensor 26 and corresponding to the cloth width are input, and at the output side , And is connected to the electric yarn assembling device 3 on the yarn feeding side and the electric yarn assembling device 3 on the side opposite to the yarn feeding side, and controls their respective motors 32 independently.

The main control device 40 receives a signal of a rotation angle of the main shaft 37 from an encoder 38 connected to the main shaft 37 of the loom as an input, synchronizes a controlled object of the loom with the main motion of the loom, and sets the selvage by the control signal. The operation of the control device 20 is controlled. Therefore, the selvage set control device 20 receives the rotation angle signal as input, and inputs the control signal, the weft type signal, the delayed rotation angle signal, and the count-up signal in synchronization with the main motion of the loom. The rotation (ON / OFF) of the motor 32 of the electric ear-assembling device 3 on the side and the motor 32 of the electric ear-assembling device 3 on the opposite yarn feeding side is controlled.

FIG. 5 shows the generation states of signals for unwinding the weft yarns of the first unwinding sensor 25 and the second unwinding sensor 26 on the rotation angle of the main shaft 37 of the loom, motors on the yarn feeding side and the anti-feeding side. 32
3 shows the changes in the rotating state of No. 2 and the flying speed of the weft 2.

The selvage set control device 20 controls the weft yarn 2 in which the weft has been inserted.
Detecting the passage time of a predetermined position of, based on this detection,
At least one selvage yarn 17 of the yarn feeder-side electric selvage device 3 and the anti-stripping-side electric selvage device 3 is closed to move the selvage yarn 1
The weft yarn 2 that has been put in the weft is gripped by 7. Here, the passage time of the weft yarn 2 at a predetermined position is detected by the first unwinding sensor 25 or the second unwinding sensor 26 provided in the weft measuring and storing device 5. The selvage control device 20 uses either the signal of the unwinding of the weft yarn of the first unwinding sensor 25 or the signal of the second unwinding sensor 26 as a detection signal according to the width of the fabric for control.

When the direction of the rotary arm 31 is upright with respect to the plane of the woven cloth 22, the yarn guide holes 31a at both ends are located vertically and maintain the two selvage yarns 17 in an open state. When the weft-inserted weft 2 reaches the predetermined position by the weft insertion and passes through the position, the first unwinding sensor 25 outputs the signal of the third unwinding of the weft. The counter 41 of sends a count-up signal to the ear-set control device 20.

At this time, when the selvage group control device 20 receives the count-up signal by the signal of the third weft unwinding, first, the motor 32 of the electric selvage device 3 on the yarn feeding side is driven to rotate the arm. Turn 31 by half turn upside down, and
By closing the selvage yarn 17 of the book and opening it in the reverse direction, the weft yarn 2 inserted is grasped on the yarn supplying side, and after a predetermined delay rotation angle from this, the motor of the electric selvedge device 3 on the opposite yarn supplying side is grasped. 32 is driven, the rotary arm 31 is half-turned upside down, the two selvage yarns 17 are closed, and the weft yarns 2 put in the weft yarns are opened in the opposite direction. Hold on the arrival side of 2.

As described above, the weft 2 is gripped by the weft 2
Because of the flying system from the yarn feeding side to the anti-yarn feeding side, the yarn feeding is performed earlier at the yarn feeding side and later at the opposite yarn feeding side at different predetermined times. Due to this different delay operation, for example, a delay rotation angle of 25 ° is set on the yarn feeder side on the setting device 39,
For example, a delay rotation angle of 65 ° is set on the non-feeding side. Therefore, the selvedge control device 20 turns on the motor 32 of the electric selvage device 3 on the yarn feeding side after the rotation angle of the main shaft 37 of the loom is 25 ° from the time when the count-up (third weft unwinding) signal is received. After the drive and the rotation angle of the main shaft 37 of the loom is 65 °, the motor 32 of the electric selvedge device 3 on the opposite yarn feeding side is driven.

The selvage control device 20 starts driving the motor 32 on the yarn supplying side, and after the rotation angle of the main shaft 37 is 15 °, the two selvage yarns 17 are closed and the weft yarn 2 in flight When the weft yarn 2 starts to be gripped and the weft yarn 2 starts to be braked, the flying speed of the weft yarn 2 is reduced. After the driving of the motor 32 on the yarn feeding side is started and the rotation angle is 30 °, the rotating arm 31 stops in the inverted state. The interlacing of the selvage yarn 17 is twisted in the vicinity of the cloth fell 23 between the cloth cloth 23 and the yarn introducing hole 31a of the rotary arm 31.
The selvage tissue is formed, and the weft yarn 2 is sandwiched between the weave 23 and the entanglement of the selvage yarn 17 on the yarn supplying side, and is strongly gripped.

Generally, at the end of weft insertion, when the locking pin 12 of the weft measuring and storing device 5 is actuated to stop the flying of the weft 2, overtension is applied to the weft 2 due to a sudden stop, but the locking pin is stopped. Since the weft yarn 2 is grasped by the selvage yarn 17 and decelerated before the operation of the weft yarn 12, there is no deterioration of the quality of the weft yarn 2, the occurrence of weft yarn breakage is eliminated, and the high quality woven fabric 22
It becomes possible to weave. After the weft insertion is completed, the weft yarn 2 is strongly gripped by the selvage yarn 17 and further cut by the yarn feeding cutter 24 in a state where no overtension due to a sudden stop is applied. ) Does not occur, and a tight ear can be formed.

The selvedge control device 20 uses the motor 32 on the side opposite to the yarn feeding side.
After the rotation angle of the main shaft 37 is 15 ° from the start of
The selvage yarn 17 of the book is in the closed state, and starts to grip the weft yarn 2 in flight. After the drive of the motor 32 on the non-feeding side is started and the rotation angle is 30 °, the rotating arm 31 stops in the inverted state. The interlacing of the selvage yarns 17 is twisted in the vicinity of the weaving cloth 23 between the weaving cloth 23 and the yarn introducing hole 31a of the rotary arm 31 to form an ear tissue, and the weft yarn 2 has the weft cloth 23 on the non-feeding side thereof. And the entanglement of the selvage 17 is sandwiched between them and they are strongly gripped.

In this way, the selvedge control device 20 on the non-feeding side causes the weft yarn 2 to be gripped as quickly as possible according to the flying state of the weft yarn 2 without obstructing the flight of the weft yarn 2. As a result, the weft yarn loosening due to the closing operation of the warp yarn 15 and the rafting can be prevented, and a tight ear can be formed.

On the other hand, the selvage yarn 17 between the yarn guide hole 31a of the rotary arm 31 and the yarn guide 30 is twisted in the opposite direction to form an entanglement. Therefore, the selvage group control device 20 performs a forward half rotation operation about 100 times to form a large number of entanglements in the selvage yarns 17 between the motor rotor 33 and the thread guide 30, and then 1 times in the reverse direction. After the rotation, the reverse half-rotation operation is performed about 100 times to eliminate the confounding.

In the setter 39, a peculiar delayed rotation angle is set according to the weft thread type. Normally, a small delayed rotation angle is set for the weft thread type having a low frictional resistance with respect to the selvage yarn 17, and the closing operation is performed early. The operation is started. By such an appropriate closing operation, the selvage yarn 17 can reliably grip the weft yarn 2.

The operation timing of the closing operation can be set by the delay time instead of the delay rotation angle. In addition, count-up (3rd weft unwinding)
The weft thread 2 may start a closing operation after the weft thread 2 has traveled a predetermined distance from the time when the signal is received, and for this reason, the selvage set control device 20 causes the first unset sensor 25 or the second unwinding sensor to operate. After measuring the time between pulses in the side sensor 26, calculating the weft flying speed from the weft length of one winding of the weft measuring and storing device 5, and detecting the pulse required to fly a predetermined flight distance. The closing operation start time is calculated and the closing operation is performed. Instead of using the first unwinding sensor 25 or the second unwinding sensor 26, as an alternative, an unwinding sensor dedicated to the weft measuring and storing device 5 may be provided so as to be movable in the drum circumferential direction. By doing so, a dedicated unwinding sensor can be installed at an optimum position on the drum circumference according to the width of the cloth, and the timing of the closing operation becomes easy.

Of course, the electric ear assembly device 3 may be an electric planetary ear assembly device instead of the electric leno device. In addition, this control is used for the closing operation of the selvage yarn in the current weaving cycle, the current weaving cycle is set as the detection cycle, and the control is executed in the next and subsequent weaving cycles based on the detection result. The closing operation of the selvage yarn in the weaving cycle may be performed.

FIG. 6 shows an example in which the weft 2 passing through a predetermined position is detected and the control is executed. In this example, the detection position of the weft yarn 2, that is, a predetermined position is near the woven fabric end on the anti-feeding side, and the weft-inserted weft 2 is detected by the weft insertion sensor 27 near the woven fabric end on the anti-feeding side. To be detected. Therefore, the weft signal output from the weft insertion sensor 27 is used not only for detecting the weft insertion state but also for controlling the electric selvedge device 3. The rotation angle or time of the main shaft 37 of the loom is set according to the weft type, and after the weft insertion sensor 27 detects the weft 2 in accordance with the next weft type, the weft feeding side and the non-feeding side in the next weaving cycle are set. The rotation angle or time of the main shaft 37 until the closing operation of the electric ear assembly device 3 is started is set.

FIG. 7 shows two weft sensors 44, 45 provided on the lead holder 43 along the weft insertion direction.
By directly detecting the front end of the weft yarn 2, the weft sensor 44 on the upstream side in the weft inserting direction is made to correspond to the electric selvedge device 3 on the yarn feeding side, and the weft sensor 44 on the downstream side in the weft inserting direction is counter-fed. It is an example corresponding to the side electric ear assembly device 3. In this example, since the flying state of the weft yarn 2 is directly detected, the time when the weft yarn 2 passes a predetermined position can be detected more accurately. By the way, without providing two weft yarn sensors, only one is provided, and after the output of the weft yarn sensor is generated, the electric selvedge device 3 on the yarn feeding side and the electric selvedge device 3 on the anti-feeding side are arranged according to the weft type. It is also possible to start the closing operation with different delay rotation angles or different delay times.

In FIGS. 8 and 9, the flying speed related information of the weft 2 is obtained based on the detection signal of the sensor 25, the driving timing is determined according to the flying speed related information, and the electric ear assembly device 3 is obtained. Is an example of driving.

In the example of FIG. 8, the reference rotation angle of the spindle 37 (hereinafter referred to as "reference drive angle") is used as the reference drive timing for starting the drive of the yarn feeding side motor 32 and the anti-feeding side motor 32. ) Are set respectively. As the flight speed related information of the weft 2, a required rotation angle between the second and third detection signals of the first unwind sensor 25 is obtained. The difference between the required rotation angle and the set reference required rotation angle, specifically, the deviation is obtained, the correction angle of each motor 32 is calculated according to the deviation, and the correction angle is corrected from each reference drive angle. At that time, the drive of each motor 32 is started. By the correction, when the required rotation angle is smaller than the reference and the flying speed of the weft 2 is fast, the driving is started earlier than the reference driving angle, and when the flying speed is large, the driving is slower than the reference driving angle. The driving is preferably started at a certain time, and the gripping of the weft yarn 2 is started when the tip of the weft yarn 2 always reaches the optimum position regardless of the flying speed. In addition,
The formulas for calculating the reference drive angle, the reference required rotation angle, and the correction angle may be changed according to the weft type and the operating conditions.

In the example of FIG. 9, the third detection signal output timing of the first disengagement sensor 25 is set as the specific time, and each motor 32 is started to drive after each predetermined period from the specific time. The predetermined period is changed according to the flight speed related information. Similar to the example of FIG. 8, the required rotation angle between the second and third detection signals of the first unwinding sensor 25 is obtained as the flying speed related information of the weft 2, and each predetermined period is calculated and changed. Then, the drive start timing of each motor 32 is changed. As the specific time, the second detection signal output time of the first unwinding sensor 25, the rotation angle of the main shaft 37 of 0 °, 150 °, or the like may be set. Further, the change of the predetermined period may be performed by presetting a predetermined period of each kind in correspondence with the flight speed related information value and selecting it in accordance with the information value without depending on the calculation.

[0046]

According to the first aspect of the present invention, in an electric selvedge device of a fluid jet type loom that holds a weft thread that has been inserted, a sensor detects the passage time of the weft thread at a predetermined position, and based on the detection signal of this sensor. The electric selvage device is driven to close the selvage yarn, and the weft yarn is gripped by the selvage yarn.

Therefore, even if the flying speed of the weft changes and the timing at which the weft reaches the position where it is gripped by the electric selvedge device also changes, the weft-inserted weft always has the ear when it reaches the optimum position. It is grasped by the thread. Further, since the weft thread is gripped by the selvage thread when it reaches the optimum position, the weft thread flying is not hindered by the presence of the selvage thread and the gripping operation by the selvage thread, and the selvage closing operation is performed at the earliest possible timing. Therefore, the weft yarn is grasped by the selvage yarn before it is loosened. Therefore, the weft slack can be reliably prevented by gripping with the selvage. In the closing operation of the selvage yarn on the yarn feeding side, the selvage yarn grips the weft yarn, and it is possible to prevent the weft yarn from loosening on the yarn feeding side due to the inward return of the weft yarn when cutting with the cutter, and In the closing operation, the selvage yarn holds the weft thread, and it is possible to prevent weft thread slack on the anti-feeding side during closing of the warp opening and beating, which allows weft thread pulling means such as a weft brake device and stretch nozzle to be avoided. Get better.

According to the second aspect, the electric ear assembly device is driven after a predetermined time has elapsed from the output of the detection signal of the sensor, and the predetermined time is determined according to the predetermined position to be set.
If the predetermined position is set so that the predetermined time is shortened, the error becomes smaller accordingly, so that the weft can be gripped at the optimum position.

According to the third aspect, the weft flying speed related information is obtained based on the detection signal of the sensor, the drive timing is determined according to the flying speed related information, and the electric selvedge device is driven. Therefore, even if the flying speed of the weft changes, the weft grip can be started when the tip of the weft reaches the optimum position, and the weft is always gripped at the optimum position.

According to the fourth aspect of the invention, the selvages of both the electric yarn assembling device on the yarn supplying side and the electric yarn assembling device on the opposite yarn supplying side are closed based on the detection signal of the sensor, so that the yarns on the yarn supplying side are closed. Since the selvage yarn is closed earlier than the selvage yarn on the non-feeding side and before the weft yarn reaches the woven fabric end on the anti-feeding side, the weft yarn reaches the woven fabric end on the anti-feeding side. Before, the weft yarn is gripped by the selvage yarn on the yarn supplying side, and this gripping brakes the flying of the weft yarn, and the weft yarn slows down. As a result, the weft yarn is grasped on the yarn supplying side, decelerated, and the flight is stopped. As a result, the weft insertion stop operation is performed in a state in which the weft flying speed is reduced, so that over tension is applied to the weft, and the weft is not cut or the fabric quality is not impaired.

According to the present invention, in the fluid jet loom having a plurality of weft insertion nozzles, the selvage closing operation of the selvage yarn is performed based on the detection signal from the sensor and the weft thread type signal. The weft thread with low frictional resistance is gripped quickly by the selvage yarn, and the weft thread with a high frictional resistance against the selvage yarn is delayed by the gripping operation. Since it is gripped after it has sufficiently run, the selvage yarn does not hinder the flight of the weft.

According to the sixth aspect, the closing operation of the electric yarn feeder on the yarn supplying side and the electric yarn engaging device on the opposite yarn feeding side is performed based on one detection signal.
Two sensors allow control of the operation of the binaural device.

According to the present invention, since the tip of the weft put in the weft is directly detected to detect the time when the weft passes the predetermined position, the time when the weft passes the predetermined position becomes accurate.
Control can be in good condition.

According to the eighth aspect, the weft amount unwound from the weft measuring and storing device is measured to detect the time when the weft passes the predetermined position. Therefore, the predetermined position of the weft is set sufficiently close to the yarn supplying side. Therefore, the control of the closing operation of the ear assembly can be executed with sufficient time.

According to the ninth aspect, the sensor provided at the end of the woven fabric on the side opposite to the yarn feeding detects the passage of the weft at a predetermined position, and the closing operation of the electric selvedge device is performed in the next weaving cycle. Thus, it is possible to control the closing operation of the ear device without providing a dedicated sensor.

[Brief description of drawings]

FIG. 1 is a plan view of a weft inserting device and an electric selvedge device of an air jet loom.

FIG. 2 is a side view of the electric ear assembly device.

FIG. 3 is a plan view of the electric ear assembly device.

FIG. 4 is a block diagram of a control system of the electric ear assembly device.

FIG. 5 shows the first unwinding sensor on the rotation angle of the main shaft of the loom,
It shows the generation status of the signal for unwinding the weft of the second unwinding sensor, the rotational states of the motors on the yarn feeding side and the non-feeding side, and changes in the weft flying speed.

FIG. 6 shows changes in the signal generation state of the weft insertion sensor, the rotation states of the motors on the yarn feeding side and the anti-feeding side, and the flying speed of the weft on the rotation angle of the main shaft of the loom.

FIG. 7 is a plan view of an electric selvedge device and a weft sensor.

FIG. 8 shows the first unwinding sensor on the rotation angle of the main shaft of the loom,
It shows the generation status of the signal for unwinding the weft of the second unwinding sensor, the rotational states of the motors on the yarn feeding side and the non-feeding side, and changes in the weft flying speed.

FIG. 9 shows the first unwinding sensor on the rotation angle of the main shaft of the loom,
It shows the generation status of the signal for unwinding the weft of the second unwinding sensor, the rotational states of the motors on the yarn feeding side and the non-feeding side, and changes in the weft flying speed.

[Explanation of symbols]

1 Air-jet loom 2 Weft 3 Electric selvage device 4 Sub-nozzle 5 Weft measuring / storing device 6 Weft insertion nozzle 7 Thread feeder 8 Balloon breaker 9 Tensor 10 Rotating arm 11 Drum 12 Locking pin 13 Operator 14 Thread guide 15 Warp Reference Signs List 16 opening 17 selvage 18 opening 19 selvage yarn feeder 20 selvage control device 21 reed 22 woven cloth 23 weaving cloth 24 yarn feeding cutter 25 first unwinding sensor 26 second unwinding sensor 27 weft insertion sensor 28 balloon breaker 29 Tensor 30 Thread guide 31 Rotating arm 31a Thread guide hole 32 Motor 33 Motor rotor 34 Rotating shaft 34a Thread guide hole 35 Guide pin 36 Guide pin holder 37 Main spindle 38 Encoder 39 Setting device 40 Main controller 41 Counter 42 Counter 43 Lead holder 44 Weft sensor 45 Weft sensor

Claims (9)

[Claims] 1. A fluid jet loom in which a motorized selvedge device is arranged on at least one of the weft yarn feeding side and the non-weft yarn feeding side and the electric yarn selvage device is independently driven. In the electric selvedge device, a sensor detects passage of a weft thread at a predetermined position, and based on the detection signal of the sensor, the electric selvage device is driven to close the selvage yarn, and the selvage yarn is gripped by these selvage yarns. A method for controlling an electric selvedge device of a fluid jet loom, comprising: 2. The method for controlling an electric selvedge device of a fluid jet loom according to claim 1, wherein the electric selvage device is driven after a predetermined time has elapsed from the output of the detection signal of the sensor. 3. The electric selvedge device is driven by determining flight speed related information of the weft yarn based on a detection signal of the sensor, determining a drive timing according to the flight speed related information. The method for controlling an electric reassembling device for a fluid jet type fiber machine according to claim 1. 4. An electric selvage assembly device on the weft supply side and an electric selvage assembly device on the opposite side of the weft yarn are arranged on the side of the weft supply side and the side of the opposite side of the weft, respectively, and the electric selvage set device on the side of the yarn supply and the electric selvage set device on the side opposite to the yarn supply are arranged based on the detection signal of the sensor. Both of the selvage yarns are closed, and the selvage yarns on the yarn supplying side are closed earlier than the selvage yarns on the anti-feeding side and before the weft reaches the woven fabric edge on the anti-feeding side. The method for controlling an electric selvedge device of a fluid jet loom according to claim 1, claim 2, or claim 3. 5. The closing operation of the selvage yarn is performed based on a detection signal from a sensor and a weft thread type signal in a fluid jet loom having a plurality of weft inserting nozzles. A method for controlling an electric selvedge device of a fluid jet loom according to claim 2 or claim 3. 6. An electric selvage assembly device on the weft supply side and an electric selvage assembly device on the opposite side of the weft yarn are arranged based on one detection signal. 4. The method for controlling an electric selvedge device of a fluid jet loom according to claim 1, 2 or 3, wherein the closing operation is performed. 7. The electric selvedge device for a fluid jet loom according to claim 1, 2 or 3, wherein the tip of the weft is detected to detect the passage time of the weft at a predetermined position. Control method. 8. The fluid jet according to claim 1, wherein the weft amount released from the weft measuring and storing device is measured to detect passage of the weft at a predetermined position. Method for controlling an electric selvedge device of a loom. 9. The closing operation of the electric selvedge device in the next weaving cycle is performed by detecting passage of a weft yarn at a predetermined position by a sensor provided at the end of the woven fabric on the side opposite to the yarn feeding. A method for controlling an electric selvedge device of a fluid jet loom according to claim 1, claim 2 or claim 3.