JPH01282371A - Weft treatment in shuttle-less weaving machine - Google Patents

Abstract

PURPOSE:To prevent occurrence of stopping of woven cloth by normally rotating a machine stand, making an opening in a closed state of port and letting a machine wait until completion of removal of bad yarn by an operator in the case wherein an opening part of warp is made into an open state and an action of removing bad yarn of warp feed is not succeeded. CONSTITUTION:When a machine stand stopped by detection of occurrence of mistake of weft feed is reversely rotated and bad yarn of weft feed is automatically removed from a warp opening part in an opened state of port, the machine stand is normally rotated and the warp opening is returned to a closed state of port in the case where removal of the bad yarn is not succeeded. A machine is let to wait in this state until removal of the bad yarn by an operation is completed so that the warp is avoided from being allowed to stand in loading of large tension for a long time.

Description

[Detailed Description of the Invention] [Industrial Application Field 1] The present invention detects the occurrence of a weft insertion error by a weft insertion error detection device, and after the machine is stopped, the machine is reversed, and the defective weft that has been inserted incorrectly is removed. This invention relates to a weft processing method in a shuttleless machine equipped with a defective weft removing device that automatically removes defective weft threads from inside the warp shed when the machine is in an open state.

[Conventional technology] Shuttleless looms such as air jet looms and A-tajet looms can achieve much higher productivity than looms with diameters, and the rate of weft insertion errors is on the order of unit compared to looms with diameters. Although it is less per production, it is slightly more when compared per unit time. In the case of a weft insertion error, the loom is stopped based on the weft insertion error detection signal from the weft insertion error detection device. After about one cycle of inertial operation after detection, the machine is completely stopped, and the weft yarns that have been inserted incorrectly (hereinafter referred to as defective wefts) are beaten before the machine stops, and the warp threads are closed and woven into the fabric. be included. Therefore, in order to remove the defective weft, the machine must be reversed to release the grip of the defective weft by the warp, and then the defective weft must be removed.

Various weft processing devices that automatically perform this defective weft removal work have been proposed (for example, Japanese Patent Laid-Open No. 61-24533
Publication No. 9). In these IRT machines, the machine stops due to a weft insertion error, and the machine is reversed and the crank angle is set to 1.
After the machine is stopped at around 80', the defective weft is removed from inside the warp opening by the defective weft removing device. After the defective weft removal device completes removing the defective weft, the machine is automatically restarted.

[Problem to be Solved by the Invention 1] In the conventional device, if a cutting accident occurs during the removal of defective wefts by the defective weft removing device and removal of the defective wefts ends in failure, the machine cannot be restarted. This was not done, and the machine remained at a crank angle of approximately 180° until the operator removed the defective weft yarn and restarted the machine. At a crank angle of 180°, the warp threads T are in the most open state as shown in FIG. 3(a'), and the tension applied to the warp threads T is also large.

If the tension applied to the warp threads T is held for a long time in this state with a large tension, the warp threads T will stretch completely, and after the worker completes the work of removing the defective weft threads and restarts the machine, the woven fabric will have R defects (stopping stages). There is a problem in that it is easy to occur.

The present invention has been made in view of the above problems, and includes:
The purpose of this is to prevent fabric defects from occurring in the woven fabric even if the defective weft removal operation by the defective weft removal device ends in failure and the weft operator performs the removal operation and restarts the machine. The object of this invention is to provide a weft processing method for shuttleless looms.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention reverses the 1η machine whose machine was stopped when the tying error detection device detects the occurrence of a weft insertion error, and detects the weft insertion error. If the removal of the defective weft by the defective weft removing device, which automatically removes the defective weft from inside the warp shedding when the machine is open, is unsuccessful, rotate the machine in the normal direction and remove the defective weft from the warp sheath. Closed,
Wait in that state until the worker removes the defective weft yarn.
I decided to do so.

[Operation] That is, in the present invention, when the defective weft removal device fails to remove the defective weft, the machine is rotated in the normal direction to a position where the warp shedding is closed, and the The machine waits until the operator performs the defective weft removal work and restarts the machine.

Therefore, unlike the conventional device, the warp opening is closed and the tension applied to the warp threads is reduced, allowing the lifting platform to start up again! I
This prevents the occurrence of stop steps in the Ia fabric woven after J.

[Embodiment] An embodiment embodying the present invention will be described below with reference to the drawings.

As shown in FIG. 2, a main nozzle 2 is fixed to one end of the slay 1, and a reed 3 having a function of guiding the weft Y is erected in front of the main nozzle 2. The weft yarn Y supplied from the weft length measuring and storage device 4 is transferred to the main nozzle 2.
The weft guide passage (
(not shown). The side of the main nozzle 2 II corresponding to the front of the woven fabric W is reeded 6! i l
A weft cutting device 5 is provided which cuts the weft Y, which is woven into the weft and connected to the main nozzle 2, at every weft insertion. The weft cutting device 5 is held in an inoperative state by the protruding operation of the air cylinder 7 when the weft insertion error detection device 6 disposed at the end of the slay 1 opposite to the main nozzle detects a weft insertion error, and the weft cutting device 5 is kept in an inoperative state by the protruding operation of the air cylinder 7. The defective weft Yb woven into the fabric is kept connected to the main nozzle 2 side.

A weft introduction duct 8, an air id 9, and a suction duct 10 are arranged on one side of the main nozzle 2.
A nozzle 11 is installed below the front weft insertion path so as to face the entrance 8a of the weft introducing duct 8. The motor 1 is connected between the weft introduction duct 8 and the air guide 9 when the slay 1 is stopped at a crank angle of approximately 180°.
2, the drive row 513 driven by the air cylinder 1
A pressing roller 15 is provided which is movable between an active position where it is pressed into contact with the drive roller 13 and a retracted position where it is spaced apart from the drive roller 13. In addition, a weft detector 1 is installed at a position opposite to the air id 9 and the suction duct] and 10.
6 are arranged. The air cylinder 7 for the weft cutting device 5 is connected to the solenoid ft 17, the blow nozzle 11 is connected to the solenoid valve 18, the suction duct 10 is connected to the solenoid valve 19, and the air cylinder 14 is connected to the solenoid valve 20. Each is connected to a pressure air supply tank 21. The weft introduced into the weft introduction duct 8 reaches the suction ducts i and 10.
Then, it is held between the two rollers 13 and 15, and is pulled toward the suction duct 10 by the rotation of both rollers 13 and 15. Further, a cutting blade 22 is disposed directly above the injection port of the main nozzle 2, and when the weft introduced into the weft introduction duct 8 is taken off by the action of both rollers 13.15, the cutting blade 22
The blade is cut by being pressed under tension against the blade.

Move the heald frame 23 up and down! A weft processing control computer 24 is supported on an opening bracket (not shown) that supports a jack lever for II, and the weft processing control computer 24 is connected to loom control computers 2 & 5.
The operation of the motor 12 and the electromagnetic valve 20 is controlled based on data exchange with the weft thread detector 16 and weft detection information from the weft thread detector 16. The weft processing control computer 24 is connected to the motor 12
The weft detection signal from the weft detector 16 from the start of rotation and the rotary encoder 12a installed in the motor 12
The weft yarn Y1. which passes through the set position of the yarn detector 16 based on the signal from Y1. The Yb(I) length σ is measured, and if the measured length is within a set value range, it is determined that defective weft removal has been successful, and if it is outside the set range, it is determined to be unsuccessful, and the identification control computer 25 The judgment signal is output to the terminal. or,
If it is determined that the process is unsuccessful, the abnormality display lamp 26 is blinked.

The fli machine control computer 25 operates the solenoid valves 17, 18, and 19 in response to a weft insertion error detection signal from the weft insertion error detection device 6 and an output signal from an encoder 27 for detecting a crank angle provided on the machine base. Controls the opening/closing operation of the machine and the forward/reverse rotation of the E-tater (not shown) for driving the machine base. A motor driven by an inverter is used as the machine drive motor.

Next, the operation of the apparatus configured as described above will be explained. In this embodiment, the defective weft processing in the case of -F due to weft insertion error is carried out according to the flowchart shown in FIG. When a weft insertion error occurs, a command is issued to stop the 25 fli machine control pin computers based on the weft insertion error detection signal from the weft insertion error detection device 6, and the solenoid valves 17 and 18
．． Issue an opening command to 19. As a result, air is injected from the blow nozzle 11 during inertial operation of the machine base, a suction airflow is generated in the suction duct 10, and the weft cutting device 5 is held in an inoperative state. Therefore, the defective weft Yb woven into the fabric is held in a state connected to the main nozzle 2 side, and the weft Y1 following the defective weft Yb is introduced into the weft introduction duct 8 without being inserted. . After the machine is stopped, the machine drive motor is reversed and stopped at the position where the slay 1 has retreated to the most retracted position (crank angle 1806), and the open state of the warp threads T is formed, and the upper and lower warp threads T
The weaving state of the defective weft yarn Yb due to the weaving is canceled.

The solenoid valve 18 is closed at the same time as the reverse φZ stop of the machine, and the valve [
]-The air outlet 1 from the nozzle 11 stops. Next, the solenoid valve 20 is opened and the air cylinder 14 is operated to protrude.
The pressing roller 15 is placed in an operating position where it is pressed against the driving roller 13, and the weft Y1 is held between the rollers 13 and 15. Subsequently, the weft detector 16 is activated, and the motor 12 is activated after a predetermined period of time. As a result, the weft Y1 is pulled toward the suction duct 10, and the defective weft yb on the front a side is pulled out from the warp opening following the weft Y1. Based on the output signals from the weft detector 16 and rotary encoder 12a, the weft processing control computer 24
If it is determined that weft processing is successful, 1! based on that signal! The machine control computer 25 outputs a restart signal for the machine. Then, the machine base is automatically reversed to the most suitable position for restarting, that is, the position of crank angle 3000, and the solenoid valve 17 is closed and the weft cutting device 5 is returned to the operable state. The machine will restart automatically.

If the nature of the defective weft Yb is known, such as when a cutting accident occurs while the defective weft Yb is being drawn out, the weft processing control computer 24 outputs a weft processing failure signal to the loom control computer 25. At the same time, the abnormality display lamp 26 blinks. The loom control computer 25 rotates the platform drive motor in the forward direction based on the signal indicating that the weft processing is unsuccessful, stops the loom at a crank angle of 300°, and waits at that position. Thereafter, the defective weft removal and restart operations are transferred to manual operations by the operator.

Until the defective weft is removed by the operator and the restart device is operated, the warp shedding is maintained in a closed state, that is, the tension applied to the warp threads T is small, as shown in Figure 3 (b), so unlike the conventional method, restarting is not possible. This prevents the formation of stop marks in the woven fabric later. When the machine frame is brought into a closed state with a crank angle of 300°, the reason why the machine is rotated in the normal direction is to prevent the warp threads T from getting entangled with the weft threads.

Note that the present invention is not limited to the above embodiments,
For example, if the defective weft removal operation is unsuccessful, the machine may be set to rotate in the normal direction after a predetermined period of time has elapsed, and the machine may be set to a closed state if the worker arrives late.

In addition, we use a conventional seven-wheel drive motor that does not use an inverter as the machine drive motor, and also use a separate low-speed drive motor to rotate the machine at low speed in preparation for removing defective wefts after the machine has stopped. Alternatively, instead of using a defective weft removing device that pulls out the defective weft Yb from the side of the warp opening, a device disclosed in Japanese Patent Application Laid-Open No. 58-220856 may be used to remove the defective weft Yb from above the warp opening. Pull out J
A configuration device may be used.

[Effects of the Invention] As detailed above, according to the present invention, when a weft insertion error occurs and the defective weft removal device fails to remove the defective weft, the machine automatically closes the warp shedding. After the machine is rotated forward, it waits in that state until it is restarted by the operator, so the warp threads are not left at 1 m with large tension applied for a long time, and the woven fabric does not change after restarting the machine. The occurrence of a stop step is prevented.

[Brief explanation of the drawing]

Fig. 1 is a flowchart showing the defective weft treatment procedure due to a bundling error, Fig. 2 is a schematic front view of a device implementing the present invention, and Figs. 3 (a) and (b) are a crank angle of 180° and a crank angle of 180°. It is a schematic diagram showing the state of the warp frontage at 300'. Main nozzle 2, weft insertion error detection device 6, weft introduction duct 8. Suction duct 10, blow nozzle 11, drive roller 13, pressure roller 15, weft detector 16, weft processing control computer 24, loom control computer 25, abnormality indicator lamp 26, defective weft Yb, weft Y, Y1, Warp T. Patent applicant Toyoda Co., Ltd. - tlJ1) Li Machinery Works representative Patent attorney On [1 Hironori 180° 300°

Claims (1)

[Claims] 1. After the machine is stopped when the weft insertion error detection device detects the occurrence of a weft insertion error, the machine is reversed and the defective weft that was incorrectly inserted is removed from the warp with the weft opening of the shedding device. In a shuttleless loom equipped with a defective weft removing device that automatically removes defective wefts from inside the shedding, if the defective weft removing device fails to remove the defective wefts, the loom is rotated forward and the warp sheath is closed. year,
A method for processing weft yarns in a shuttleless loom, which waits in this state until a worker removes defective weft yarns.