JPH06306745A - Method for treating weft miss in multi-spindle loom and apparatus therefor - Google Patents

Abstract

PURPOSE:To provide a method and apparatus for the treatment of weft-insertion miss in multi-spindle loom capable of automatically inserting a weft in the case of weft-insertion miss even at an increased weaving speed. CONSTITUTION:In a loom capable of correcting weft-insertion miss, the working position of a frame stopped by weft-insertion miss is detected by an encoder 48 (working position detection means). When the stop position is within a range to enable reverse rotation to return to the normal stop range enabling the single operation of a weft-insertion mechanism 7, the whole frame is automatically rotated in reverse direction to the normal stop range and, thereafter, the weft-insertion mechanism 7 is separated from the other mechanisms 11 and singly operated to perform the weft-insertion at the position before the insertion miss.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for operating a machine base when weft miss processing is performed on a loom for weaving multiaxial fabrics.

[0002]

2. Description of the Prior Art For example, in a loom for weaving a triaxial weave, a weft is inserted by a rapier into a shed formed by intersecting warps guided by heddles in a substantially opposite heddle row, and the weft is driven by a driving means. While driving, the warp is opened and the heddle is moved one pitch in the weft direction, and the heddle that reaches the end of the heddle row is rotated to the facing heddle row. In order to do so, if there is a weft insertion error during weft insertion by the rapier, this is detected by the weft sensor, the machine stand is stopped by the weft insertion error detection signal, and then only the weft insertion mechanism is automatically operated independently. There is a device in which weft insertion is performed at a place where weft insertion error is made (Japanese Patent Application No. 3-110749).

[0003]

The weft insertion error detection signal is sent at the time of delivery of the weft by the rapier, that is, at the timing when the weft enters the feed rapier up to the center of the width of the fabric and is delivered to the receiving rapier. Output at the same time (because the wefts are often broken when the rapier is delivered), and the weaving speed is low (80r.pm).
(Below) In a conventional multi-spindle loom, if the machine stand is stopped by this weft insertion error detection signal, the operation position of the machine stand is still stopped with the warp forming a shed, so the operator If the weft inserting mechanism alone is operated as it is, the weft thread is automatically wefted into the portion where the weft insertion error occurs, and the weft insertion error is recovered.

However, if an attempt is made to increase the weaving speed to increase the woven cloth production capacity, even if an attempt is made to stop the machine stand by the weft insertion error detection signal output at the above timing, due to inertia and other reasons, the machine stand Stops only after the warp has moved to the operating position where the shed is not formed, and even if only the weft inserting mechanism is operated alone, the rapier does not interfere with the warp in the state where the shed is not formed. , The inconvenience of cutting this has occurred.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the method of the present invention uses a rapier to insert a weft yarn into a shed formed by intersecting warp yarns guided by the heddles of substantially opposite heddle rows. Putting in, opening the warp while driving the weft with the driving means, moving the heddle 1 pitch in the weft direction, and
A weaving machine for weaving a multi-axis woven fabric by rotating the heddle reaching the end of the heddle row to the facing heddle row and stopping the machine base after detecting a weft insertion error and then only the weft insertion mechanism In a loom that automatically operates independently of other mechanisms to handle weft insertion errors, the operating position detection means detects the operating position of the machine stand that has been stopped due to the weft insertion error, and When the reversing range is outside the normal stop range where the insertion mechanism can operate independently, the entire machine base is automatically reversed to return to the normal stop range, and then the weft insertion mechanism is separated from other mechanisms to operate independently. The feature is that weft insertion is performed. Further, the device of the present invention puts the weft by a rapier into the shed formed by intersecting the warps guided by the heddles of the substantially opposite heddle row, and opens the warp while driving the weft with the driving means, A weaving machine for weaving a multiaxial fabric by moving the heddle in the weft direction by one pitch and rotating the heddle reaching the end of the heddle row to the facing heddle row, and detecting a weft insertion error. After stopping the machine stand, only the weft insertion mechanism is automatically operated independently of the other mechanisms to handle the weft insertion error, and an operating position detecting means for detecting the operating position of the machine stand is provided. A first discriminating means for discriminating whether or not the stop position of the machine base by the operating position detecting means is within a normal stop range in which the weft inserting mechanism can be independently operated; Second determining means for determining whether or not A reverse rotation command means for reversely rotating the entire machine base based on the determination result of the second determination means, and an independent operation command means for independently operating the weft inserting mechanism based on the determination result by the first determination means. To do.

[0006]

The operation position of the machine frame stopped by the weft insertion error is detected by the operation position detecting means, and the machine position can be reversed although the stop position is outside the normal operation stop range where the weft insertion mechanism can be operated independently. When it is in the reverse rotation possible range, the entire machine base is automatically reversed to return to the normal stop range. After that, the weft inserting mechanism is separated from the other mechanisms, and the weft insertion is performed by performing an independent operation. In this way, when the stop position is out of the normal stop range and is in the range where it can be reversed, the machine frame is automatically returned to the normal stop range, so that the weft insertion at the position where the weft insertion error has occurred increases the weaving speed. If you do, you can do it automatically.

[0007]

EXAMPLE A multi-axis loom according to the present invention will be described with reference to FIGS. In this multi-spindle loom, as described in Japanese Patent Application No. 3-110,749, the heddle row U ₁ ,
U ₂ are arranged substantially opposite to each other, and each heddle row U ₁ , U
₂ are shifted by 1/2 of the pitch between the heddle 1 so as to enter between the heddles 1 of heddle row U _1, U ₂ a number of heddle 1 constituting each heddle column U _1, U ₂ are opposed to each other. Heddle _{1 of} each heddle row U ₁ , U ₂ has 1 heddle for each row
An opening cam mechanism 3 for advancing and retreating is connected. Warps a and b sent from a large number of warp sending-out beams (not shown) located above the heddle 1 are supplied to each of the heddles 1 via a known compensator cam for making the length to the heddle 1 uniform on the way. Heddle row U by the cam mechanism 3
₁ and U ₂ are moved forward and backward to perform opening and closing motions of the warp yarns a and b.

To the heddle 1 of each of the heddle rows U ₁ and U ₂ , there is connected a traverse cam mechanism 5 configured to repeat 1 pitch movement of the heddle 1 in the weft direction for each row. Further, a temple 6 is provided immediately downstream of the cloth fell FL so that the woven cloth CH is sent to a cloth winding roll (not shown). Heddle column U _1, heddles row U ₁ in the weaving-width direction ends of the U ₂ the heddle 1 arriving to the end of the heddle column U _1, U _2, opposing, U ₂
A transfer device 2 for turning to is provided and driven by a transfer cam 4.

The weft insertion mechanism 7 comprises a weft supply device 42, a rapier device 40, and a weft release device 17. Weft feeder 4
2, the solenoid 45 operates at a predetermined timing according to a command from the control device 60, is supplied from a weft bobbin 41 through a sensor 9 which detects a weft breakage and outputs a yarn breakage detection signal to the control device 60, and a weft Y rapier. It is designed to be routed to the front passage. As well known, the rapier device 40 includes a gripping rapier 20 and a receiving rapier 15, which are driven by rapier cams 16 and 21 and rocking levers 8 and 8.
The two rapiers 15 and 20 approach and separate from each other above the cloth fell FL and deliver the weft Y fed by the weft supply device 42. Further, the weft releasing device 17 for releasing the weft Y of the receiving rapier 15 is driven by a releasing cam 18, and the gripper 15a of the receiving rapier 15 is driven by the weft releasing device 1 at the end on the side opposite to the weft inserting side.
The weft Y is released by pressing it with the pressing piece 17a of No. 7.

As the driving means 30, a pair of beaters 31 are provided facing the front and rear of the cloth fell FL (FIG. 3 (a)). These beaters 31 are driven by a beater cam device 32, and one beater 31 sandwiching the cloth fell FL pushes the weft Y into the cloth fell FL and holds that state (FIG. 3 (b)).
Next, when the warps a and b are crossed to form a shed, weft insertion is performed in the shed, and the beater 31 on the other side pushes the warp from the standby position B ₁ (FIG. 3 (c)). ), Orizen FL
The beater 31 that had been pressing back retracts and the warps a, b
The operation of returning to the standby position B ₁ located closer to the front is performed (FIG. 3 (d)). The operation timing at which the warp yarns a and b form an intersecting shed that does not interfere with the entry of the rapiers 15 and 20 is indicated by T ₁ in FIG. 5, and at other timings, the rapiers 15 and 20 are warped yarns a and b. Interfere with. The operation timing at which the beater 31 does not interfere with the rapiers 15 and 20 is shown at T ₂ in FIG.
Reference numerals 5 and 20 interfere with the beater 31. Reference numeral 44 is a selvege cutter that cuts the weft yarn after weft insertion, and is operated by a cutter operating cam 26.

Next, the drive system 10 of the weft inserting mechanism 7 and the drive system 12 of the other mechanism 11 excluding this will be described in detail. The drive system 10 of the weft inserting mechanism 7 leads from the motor 13 via the clutch unit 14 to the cam mechanism 16 of the receiving rapier 15 and the release cam mechanism 18 of the weft releasing device 17 on the right side of FIG. The cam mechanism 21 is reached. The drive system 12 for driving the other mechanism 11 is driven from the main motor 23 via the clutch unit 24 by the drive cams 26 of the left and right selvage cutters 44, the left and right cam mechanisms 32 of the driving means 30, the cam mechanism 3 and the transformer. Reaches Cam 4. The weft insertion drive system 10 and the other drive system 12 are connected via a clutch body 33 during normal operation. In this embodiment, when the weft insertion error causes the stop position of the machine base to stop in the reversible range B to be described later, the clutch unit 24 is disengaged, the clutch unit 33 is connected, the clutch unit 14 is connected, and the auxiliary motor 13 is reversed. After that, the entire machine base is rotated in the reverse direction, and after returning to the normal stop range A, the clutch body 33 is disengaged and only the weft insertion drive system 10 is driven by the forward rotation of the auxiliary motor 13.

The clutch body 33 is, for example, a single-position tooth clutch (only at one specific position in the circumferential direction,
Non-meshing) was used and after reversing the entire machine base,
When the weft insertion mechanism 7 is driven by the auxiliary motor 13, the clutch body 3
Since the clutch body 33 is again engaged with the weft-insertion drive system 10 at the original position, the operation timing relationship between the weft-insertion mechanism 7 and the other mechanism 11 is always constant. I am doing it. Reference numeral 48 is an encoder as an operating position detecting means for detecting the operating position of the entire machine base, and an operating position signal from the encoder 48 is output to the control device 60.

The controller 60 is a central processing unit (CP).
U) 61 and a storage device 62, to which a keyboard 63 is connected. In addition to the normal operation program, the storage device 63 stores the independent operation program of the weft inserting mechanism 7 when the weft is broken as shown in FIG. In addition, this control device 6
When the yarn break signal is input from the sensor 9, the operating position of the machine base input from the encoder 48 is 220 ° to 240 when one cycle of the rapier is 360 ° as shown in FIG. The machine stop signal is output during the interval. This operating position 220 ° -240
Is the timing at which the weft Y is delivered from the gripping rapier 20 to the receiving rapier 15.

Further, from the keyboard 63, as shown in FIG. 5, the normal stop range A is set and input between 240 ° and 300 ° of the operating position of the machine base and 300 °.
A range of up to 350 ° is set and input as a reversible range B in which the entire loom can be reversed, and these values are stored in the storage device 62, respectively. When the entire loom is rotated in the reverse direction, the warp yarns a and b are not rewound to the warp feed-out beam due to the structure of the loom, so the tension of the warp yarns a and b is slackened. Therefore, the slack in the reversible range B does not cause uneven weaving. It is set to such an amount. Further, 64 is a normal operation switch, and 65 is an independent operation switch.

Next, the operation of the apparatus constructed as described above will be described with reference to FIG. When the sensor 9 detects the occurrence of a weft insertion error, the machine frame signal X is output and the machine frame stops. At this time, when the rotation of the loom is 80 rpm or less and the machine stand is stopped by the machine stop signal X, the machine stops in the normal stop range A,
When the loom rotates faster than 80 rpm, it exceeds the normal stop range A and stops in the reversible range B.

Next, the operator pushes the islanding operation switch 65 (step P1), and the operating position data from the encoder 48 at the time of stop, that is, the machine stop position functions as the first discriminating means 50 in step P2. If it is A, or if it is not, the reversible range B is judged in step 9 which functions as the second judging means 51 by comparing it with the ranges A and B stored in advance, and in any case, the brake of the auxiliary motor 13 is released. Then, the clutch 24 is disengaged and the clutch 24 is disengaged to connect the clutch unit 14 (step P3, step P10). In that state, if the machine stop position is in the reversible range B, the reverse rotation command means 5
Auxiliary motor 1 by steps P11 to P13
A reverse rotation command is output to 3 and the auxiliary motor 13 reversely rotates,
The entire machine base is reversed to return the stop position to the normal stop range A and the auxiliary motor 13 is stopped.

Next, when stopping in any of the ranges A and B, the clutch body 33 is disengaged to disconnect the drive system 10 of the weft inserting mechanism 7 from the other drive system 12, and the auxiliary motor Step P4 in which the solenoid 13 is normally rotated at a low speed and the solenoid 45 is operated to function as the islanding operation command means 52.
Through P7, only the weft inserting mechanism 7 is driven to perform the weft insertion in the state before the weft insertion error, and after the clutch body 33 is connected during the rotation, the auxiliary motor 13 is stopped and the weft error processing is completed. The operator operates the normal operation switch 64 to bring the machine base into the normal operation. It should be noted that the stop position is in the reverse rotation possible range B
If it is out of the range, it is determined in step 9 that the automatic operation of the machine base is stopped and the weft insertion work is performed manually by the operator.

As described above, even when the machine base stop position is stopped in the reversible range outside the normal stop range by the weaving speed which is faster than the conventional one, only the weft inserting mechanism is automatically set to the normal stop position before the weft insertion error. Since the weft insertion is performed by returning the weft, the weft can be automatically inserted into the position where the weft insertion error occurs even when the weaving speed is increased.

[0019]

As described above, according to the present invention, the operating position of the machine frame stopped by the weft insertion error is detected, and when the stop position is in the reversible range outside the normal stop position, the entire machine frame is reversed. By doing so, the weft is returned to the normal stop range, and weft insertion is performed by operating only the weft inserting mechanism independently.Therefore, even when the weaving speed is faster than before, weft insertion can be performed when the shed is in the open state and warp and It is possible to automatically perform the miss processing of the weft without any interference and without cutting the warp.

[Brief description of drawings]

FIG. 1 is an overall view of a device of the present application.

FIG. 2 is an explanatory diagram of a heddle.

FIG. 3 is a diagram for explaining the operation of the beater.

FIG. 4 is a flow chart of the present apparatus.

FIG. 5 is an operation timing chart.

[Explanation of symbols]

1 heddle, 7 weft insertion mechanism, 11 other mechanism, 1
5,20 rapier (receiver rapier, gripping rapier), 30
Driving means, 31 beater, 48 encoder (operating position detecting means), 50 first determining means, 51 second determining means, 52 single operation commanding means, 53 reverse rotation commanding means, a, b warp, Y weft, U ₁ , U ₂ heddle row

Claims (2)

[Claims] 1. A weft is inserted by a rapier into a shed formed by intersecting the warps guided by the heddles of a substantially opposite heddle row, and the warp is opened while the weft is driven by a driving means, and the heddle is attached. A weaving machine for weaving a multi-axis woven fabric by moving one pitch in the weft direction and rotating the heddle reaching the end of the heddle row to the facing heddle row. After stopping the
In a loom that is automatically operated independently of other mechanisms to handle weft insertion errors, the operating position detection means detects the operating position of the machine stand that has stopped due to the weft insertion errors, and the stop position is the weft insertion mechanism. When it is in the reversible range outside the normal stop range that can be operated independently, the entire machine base is automatically reversed to return to the normal stop range, and then the weft insertion mechanism is disconnected from other mechanisms to operate independently. Weft yarn mistreatment method for multi-spindle loom. 2. A weft is inserted by a rapier into a shed formed by intersecting the warps guided by the heddles of a substantially opposite row of heddles, and the warp is opened while the weft is driven by a driving means to open the heddle. A weaving machine for weaving a multi-axis woven fabric by moving one pitch in the weft direction and rotating the heddle reaching the end of the heddle row to the facing heddle row. After stopping the
In a loom that automatically operates independently of other mechanisms to handle weft insertion errors, the operating position detecting means for detecting the operating position of the machine base and the stop position of the machine base by the operating position detecting means are First discriminating means for discriminating whether the insertion mechanism is in a normal stop range in which it can be operated independently; second discriminating means for discriminating whether the machine stand stop position is in a reversible range outside the normal stop range; A multi-axis having a reverse rotation command means for reversely rotating the entire machine base based on the determination result of the determination means, and an independent operation instruction means for independently operating the weft inserting mechanism based on the determination result by the first determination means. Weft miss processing device for loom.