JPH07126962A - Method for controlling epicyclic gear-type selvage apparatus - Google Patents

Abstract

PURPOSE:To prevent the shrinkage of a weft without lowering the quality of a woven cloth, when a loom is reversed to a restarting angle. CONSTITUTION:This invention concerns an epicyclic gear-type selvadge apparatus rotating in a synchronous manner with a shedding shaft of a shedding motion driven by a specialized driving motor. If the loom is stopped, it is reversed to the restarting position to return the shedding. During this operation, the synchronous control of the driving motor is once stopped at a specified shedding position and the driving motor is kept in a stopped state. After the loom is restarted, the synchronous control of the driving motor with the shedding shaft is restored when the shedding shaft arrives at the specified shedding position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a planetary gear type selvage device for a shuttleless loom.

[0002]

2. Description of the Related Art In a shuttleless loom, since weft yarns are cut every time weft is inserted, it is necessary to form an ear tissue in order to prevent the ends of the weft yarns in the woven fabric from being unraveled. A planetary gear type ear assembly is used. By the way, when a weft insertion failure occurs, the loom is stopped, the loom is rotated in reverse to eject the defective thread, and after removing the defective thread, the main axis of the loom is reversed to a position where the loom can be restarted. At the time of reversing to a position where the loom can be restarted, the warp yarn and the selvage yarn release the normal restraint of the weft yarn, which causes a problem that the weft yarn shrinks.

On the other hand, Japanese Patent Laid-Open No. 62-206059 discloses not to release the restraint of the weft yarn by the braided yarn at the time of reversing the loom after the defective yarn is removed. That is, the technique is to separate the selvedge device from the main shaft of the weaving machine when the weaving machine is reversed after the defective yarn is removed, so that the weft yarn is normally restrained by the selvage yarn.

In Japanese Utility Model Laid-Open No. 5-22583, a clutch is provided on the drive shaft of the planetary gear type selvage device for the same purpose as the above-mentioned prior art, and when the weaving machine is rotated in the reverse direction, the first reverse rotation is correct. It is disclosed that the selvage braid is prevented from opening during reverse rotation by releasing the clutch from.

According to the above-mentioned two prior arts, a clutch is provided on the drive shaft of the planetary gear type selvage device in order to separate the planetary gear type selvage device from the main shaft of the loom. There is a drawback in that the clutch connection work becomes complicated when it is brought into the connected state due to the necessity of phase matching.

On the other hand, in Japanese Patent Laid-Open No. 61-207646, the clutch is set to the on state in order to automatically connect the clutch provided on the drive shaft of the weft length measuring drum immediately after starting the loom. However, it discloses to restart the loom. However, in such a clutch connection method, after the loom is restarted, it is necessary to surely engage the clutch without impact while the rotational speed of the main shaft of the loom is low. It will be limited to just before the clutch engagement position.

For this reason, such a clutch connection method is described in the above-mentioned two prior arts (Japanese Patent Laid-Open No. 62-206059).
And the technique disclosed in Japanese Utility Model Laid-Open No. 5-22583), the restart position of the loom is restricted to a position slightly before the maximum opening position. Then, when the loom is restarted, due to the lack of beating force, a weaving step is likely to occur, and the quality of the woven fabric is also deteriorated. For this reason,
The technique of the above-mentioned clutch connection method cannot be directly used for controlling the planetary gear type ear assembly device.

[0008]

OBJECTS OF THE INVENTION It is therefore an object of the present invention to prevent weft thread shrinkage when the loom is reversed to a startable angle without degrading the quality of the woven fabric.

[0009]

According to the control method of the present invention, in a planetary gear type selvage device driven by a dedicated drive motor that rotates in synchronization with the shedding shaft of the shedding device, after the loom is stopped, When reversing the loom to the restart position and returning the shed, the synchronous control of the drive motor is interrupted at the predetermined shed position, the drive motor is stopped, and after the loom is re-started, the shed shaft moves to the predetermined shed position. When this occurs, the synchronous control of the drive motor with respect to the shed axis is restored to prevent the weft yarn from shrinking by holding the weft yarn with the selvedge yarn without degrading the quality of the woven fabric. The work to start has been simplified.

As described above, the drive motor of the planetary gear type ear assembly always rotates synchronously with the opening axis of the opening device. For example, when the shedding device of the loom has a pick finding function and is driven by a motor for pick finding during reverse rotation, that is, the reverse rotation of the shedding device is performed by an auxiliary motor provided separately from the driving motor of the loom. When this is done, the drive motor of the planetary gear type selvage device is configured to always rotate synchronously with the shedding shaft, since the main shaft of the weaving machine remains stopped during reverse rotation of the shedding device. When the shedding device does not have a pick finding function, that is, since the shedding shaft of the shedding device and the main shaft of the loom are always connected, the drive motor of the planetary gear type selvage device is always
It is synchronized with the shedding axis of the shedding device, in other words the main axis of the loom.

The predetermined opening position means an opening position in a predetermined loom cycle, and is usually set as the maximum opening position. However, the predetermined loom cycle differs depending on the cause of the loom stoppage. For example, in the case of weft stopping, the predetermined opening position is usually the opening position (maximum opening position) in the loom cycle one cycle before the loom stop (cycle with poor weft insertion), and in the case of vertical stopping, The predetermined opening position is an opening position (maximum opening position) in the loom cycle at the stop position.

[0012]

[Embodiment 1] This embodiment 1 is intended for a loom not having a pick finding function, and a drive motor of a planetary gear type selvage device is synchronously rotated by a control device while inputting a rotation angle of a main shaft of the loom. Here is an example. The predetermined opening position is the maximum opening position, and is set as a rotation angle of 180 degrees of the main shaft at this time.

FIG. 1 shows a method of the present invention, which is a control device 2 of a planetary gear type selvage device 1 and a spindle controller 3 of a loom 5.
The example shown in FIG.

The planetary gear type ear assembly 1 includes a drive motor 4
Is driven by. That is, the rotation of the drive motor 4 is transmitted to the rotating body 6 and the rotating body 6
An orbital motion is given to the pair of planetary gears 7 supported by. At this time, the revolving planetary gear 7 engages with the sun gear 8 fixed to the center to rotate on its own axis, thereby preventing twisting of the selvage yarn 9 from the bobbin integrally supported with the planetary gear 7 and revolving. As a result of the movement, opening movement is given to the braided yarn 9. Of course, the opening movement of the selvedge yarn 9 is synchronized with the opening movement of the warp yarn 10, and the warp yarn 10
Both ends of the weft thread 11 put in the opening of the are held by the braided thread 9 to form the ear tissue.

On the other hand, the control device 2 interlocks with the spindle controller 3 of the loom 5, detects the rotation angle of the spindle 12 of the loom 5, and controls the rotation of the drive motor 4 in synchronization with this. The spindle controller 3 controls the rotation of the drive motor 13 of the loom 5 while inputting a start signal and a stop signal. The drive motor 13 rotates the main shaft 12 to drive the opening shaft 16 of the opening device 14 and the other main motion device / auxiliary motion device 15.

The rotation of the main shaft 12 is performed by the encoder 1
Decoder 18 detected by 7 and inside the control device 2
The position commander 1 as a signal of the rotation angle of the spindle 12 via the
9 is input. The position commander 19 is used for the drive motor 4
In addition to the signal of the rotation angle of the spindle 12, a necessary signal is input from the spindle controller 3 via the data bus 20 and the interface 21 in order to drive the memory 2.
2, necessary data is also input from the CPU 23, the position pattern setter 24, etc., and a command signal is output to the up input end of the deviation counter 25.

The deviation counter 25 drives the drive amplifier 26 based on the command signal to drive the drive motor 4 by a required rotation amount at a predetermined speed, thereby rotating the drive motor 4 to the main shaft of the loom 5. Follow 12 rotations.
The rotation of the drive motor 4 is detected by the encoder 27 and sent back to the drive amplifier 26 as a rotation speed signal and to the down input end of the deviation counter 25 as a pulse train signal corresponding to the rotation amount for feedback control. It has become.

Next, FIG. 2 shows a sequence of operations required corresponding to the rotation angle of the main shaft 12 when a weft insertion defect occurs, and FIG. 3 shows when a weft insertion defect occurs.
On the time axis, the rotation states of the drive motor 13 and the drive motor 4 are shown.

Prior to the operation of the loom 5, the three position patterns are preset by the CPU 2 by the position pattern setter 24.
Input to 3. The first position pattern corresponds to the rotation angle of the main shaft 12 of the loom 5 in order to cause the shedding motion of the selvedge yarn 9 to be performed in synchronization with the shedding motion of the warp yarn 10 during normal weaving operation. It is input as command data for setting a target rotation angle of the drive motor 4. Further, the second position pattern is such that, when the main shaft 12 is rotated in the reverse direction, the drive motor 4 of the planetary gear type ear assembly device 1 is operated from when the rotation angle of the main shaft 12 becomes 180 degrees for the second time until it becomes 180 degrees again. Is input as command data for maintaining the rotation angle. Further, the third position pattern is such that, when the main shaft 12 rotates in the reverse direction, the rotation of the drive motor 4 of the planetary gear type ear assembly device 1 starts when the rotation angle of the main shaft 12 first reaches 180 degrees and then again reaches 180 degrees. It is input as command data for maintaining the angle.

When these position patterns are input, the CPU 23 takes in the three input position patterns and stores them in the memory 22. During operation of the loom 5, the first
Is read from the memory 22 by the CPU 23 and given to one input of the position commander 19.
The position command device 19 inputs a signal of the rotation angle of the main shaft 12 of the loom 5 via the encoder 17 and the decoder 18,
Planetary gear type ear assembly 1 based on the first position pattern
The pulse train signal corresponding to the drive motor 4 is output to the up input of the deviation counter 25 so that the drive motor 4 has a target rotation angle corresponding to the rotation angle of the main shaft 12.

Therefore, the deviation counter 25 controls the drive amplifier 26 based on the deviation to rotate the drive motor 4 at a predetermined speed by a rotation amount corresponding to the deviation. The rotation state of the drive motor 4 is detected by the encoder 27, and is output as a speed feedback signal to the drive amplifier 26.
Is sent to the down input of the deviation counter 25 as a pulse train signal corresponding to the rotation amount. Therefore, the drive motor 4 always follows the rotation of the main shaft 12 by rotating in the direction of decreasing the deviation in synchronization with the rotation of the main shaft 12.

When a weft insertion failure is detected during operation of the loom 5, the control device 2 and the spindle controller 3 perform necessary operations in the order shown in FIGS. That is, when a weft insertion failure is detected, a stop signal is given to the spindle controller 3 from a loom control device (not shown). The spindle controller 3 brakes the spindle 12 and, after inertial operation, stops the spindle 12 at a predetermined rotation angle, for example, 200 degrees. Of course, during this time, there is no cleaning. Since this stop corresponds to the poor weft insertion, a signal indicating that the weft is stopped is sent from the spindle controller 3 to the CPU 23 via the interface 21.

Therefore, the CPU 23 outputs the second position pattern to the position commander 19 in addition to the first position pattern. After the loom 5 is stopped, the main spindle controller 3 reverses the main spindle 12 by about 480 degrees to stop it at 180 degrees of the loom cycle in which the weft insertion failure occurs,
The weft thread 11 having a poor weft insertion is set in a state in which it is easy to take out, that is, in a state of being exposed. Simultaneously with the reverse rotation of the main shaft 12, the position commander 19 reverses the drive motor 4 of the planetary gear type ear assembly device 1 based on the first position pattern while inputting a signal about the rotation angle of the main shaft 12, causing a defect. Weft thread 1
1 is set to the mouth. After the defective weft 11 is put out,
The defective weft thread 11 is removed from the opening of the warp thread 10 manually or automatically.

When the defective weft thread 11 is removed, the spindle controller 3 reverses the spindle 12 and stops it at the position of 300 degrees in the loom cycle immediately before the weaving cycle in which the weft insertion failure occurs. When the defective weft thread 11 is in the lead-out state, the spindle 12 has reached 180 degrees for the second time during the reverse rotation of about 480 degrees, so the position commander 19
Is due to the spindle 12 becoming the second 180 degrees,
From this point on, the operation follows the second position pattern. That is, in order to maintain the current rotation angle of the drive motor 4 of the planetary gear type ear assembly device 1 until the rotation angle of the main shaft 12 reaches 180 degrees for the second time and then again reaches 180 degrees, the position of The commander 19 does not output the pulse train signal even if the rotation angle signal from the decoder 18 changes, and sets the drive motor 4 in a stopped state. Therefore, during that time, the drive motor 4 of the planetary gear type ear assembly device is
Placed in a stopped state. As a result, at the time of reversing after the defective weft thread 11 is removed, the warp thread 10 releases the restraint of the weft thread 11 that has been normally put in before the occurrence of the weft insertion failure, but the selvage braid thread 9 becomes normal. 1 weft thread
1 is kept restrained to prevent its shrinkage.

After that, the start signal is output to the main spindle controller 3 manually or from the side of the loom controller (not shown), so that the drive motor 13 of the loom 5 is set to the start state. After the start, the position commander 19 does not output the pulse train signal and keeps the drive motor 4 stopped until the rotation angle of the main shaft 12 reaches 180 degrees.
When the rotation angle of 180 degrees becomes 180 degrees, a pulse train signal is generated based on the first position pattern, and the drive motor 4 is started. In this way, the drive motor 4 is driven again in synchronization with the rotation of the main shaft 12. Therefore, the planetary gear type selvage device 1 holds the newly weft-inserted weft thread 11 after the drive motor 4 is started.

When the cause of the stop of the loom 5 is warp yarn breakage, a signal indicating the warp stop is output from the spindle controller 3 to the CPU 23. Therefore, the CPU 23 outputs the third position pattern to the position command unit 19 to perform the necessary operation. FIG. 4 shows the operation at the time of vertical stop. If a stop signal for warp yarn breakage is generated, as in the case of weft stopping,
The spindle 12 stops near 0 degrees. After that, the reverse rotation is performed up to the starting angle of the loom cycle at which the stop signal is generated, and after the operation required to repair the warp stop is completed, the drive motor 13 is started.

In the reverse rotation starting process, the planetary gear type selvage device 1 is set to the stopped state at 180 degrees of the loom cycle next to the loom cycle in which the stop signal is generated. Also, when the rotation angle of the main shaft 12 reaches 180 degrees in the starting process,
The planetary gear type ear assembly device 1 starts operation. That is, the position commander 19 causes the drive motor 4 to rotate in the reverse direction based on the first position pattern when the spindle 12 is rotated in the reverse direction.
The drive motor 4 is controlled based on the position pattern. As a result, the position commander 19 causes the spindle 12 to rotate 180
The pulse train signal is not output until the signal passes the angle regardless of the change in the rotation angle signal from the decoder 18. That is, the drive motor 4 remains stopped until the main shaft 12 passes 180 degrees by the start of the loom 5. Therefore, even in the case of the vertical stop, the weft thread 11 that has been properly wefted is held by the selvage thread 9 of the planetary gear type selvage assembly 1. In addition, the planetary gear type ear assembly device 1
Since the rotation angle of the main shaft 12 when the synchronization with the main shaft 12 is released and the rotation angle of the main shaft 12 when the synchronization is restored are always the same, in the process of operation required for vertical stop, The synchronization between the drive motor 4 and the spindle 12 is kept accurate.

[0028]

[Second Embodiment] This second embodiment is directed to a loom having a pick finding function. The drive motor controller of the planetary gear type selvage device controls the rotation of the drive motor while inputting the rotation angle of the opening shaft. This is an example of controlling.

As shown in FIG. 4, the opening device 14 is connected to the main shaft 12 via a clutch 28, and the motor 3 for pick finding is connected via a clutch 29.
It is linked to 0. The encoder 17 on the input side of the position commander 19 performs the same control as in the first embodiment by detecting the rotation angle of the opening shaft 16 of the opening device 14.

For example, when a poor weft insertion is detected,
A stop signal is output. After the inertial operation, the main shaft 12 of the loom 5 stops at a rotation angle of about 200 degrees. Opening device 1
4 in reverse rotation, the coupling between the main shaft 12 and the opening shaft 16 is separated by the clutch 28, and the clutch 29 is operated to operate the motor 30 for pick finding and the opening shaft 1.
6 and 6 are connected. After that, only the motor 30 is rotated and only the opening device 14 is rotated in the reverse direction. At this time, the spindle 1
2 is not rotating.

When the opening axis 16 reaches 180 degrees for the second time during the reverse rotation of the opening axis 16, the position commander 19 operates based on the second position pattern, and the opening axis 16 moves for the second 180 degrees. From when it reaches 180 degrees until it reaches 180 degrees again
The pulse train signal is not output, and the drive motor 4 remains stopped. When the opening shaft 16 reaches 180 degrees for the second time, the defective weft thread 11 is removed from the cloth fell when the yarn feeding is completed. After that, the opening axis 16 is reversed by 340 degrees, that is, until the opening axis 16 reaches 200 degrees in the previous loom cycle. At this position, the opening shaft 16 is connected to the main shaft 12. During this period, the drive motor 4 of the planetary gear type ear assembly device 1 is in a stopped state.

After connecting the main shaft 12 and the shed shaft 16, the loom 5
To start. After the loom 5 is started, the position commander 19 does not output a pulse train signal until the rotation angle of the shedding shaft 16 reaches 180 degrees, and when the rotation angle reaches 180 degrees, based on the first position pattern. A pulse train signal is output to drive the drive motor 4. Therefore, the drive motor 4 is driven again in synchronization with the rotation of the opening shaft 16.
In addition, in the above-described embodiment, the predetermined opening position is the maximum opening position in the predetermined loom cycle, but it is not limited to the maximum opening position. In short, when reversing,
It suffices as long as the restraint of the weft thread 11 by the braided thread 9 does not release until the weft thread 11 contracts.

[0033]

[Other Embodiments] For example, at the time of wefting, after removing the defective weft thread 11 and reversing the loom 5 to the restart position, the rotation polarity of the drive motor 4 of the planetary gear type selvage device 1 is reversed, After that, when the loom 5 is restarted, the rotation polarity may be returned to the original value. According to this
After the defective weft thread 11 is removed, when the loom 5 is reversely rotated to the restart position, the planetary gear type selvedge device 1 is normally rotated, the selvage weft thread 9 is excessively twisted, and the weft thread 11 is more reliably restrained. As a result, the weft thread 11 at the position close to the weave can be reliably prevented from shrinking.

[0034]

According to the present invention, the weft shrinkage can be prevented without degrading the quality of the woven fabric, and the work for restarting the loom can be simplified, so that the loom stop time can be shortened. it can.

[Brief description of drawings]

FIG. 1 is a block diagram of a control system for carrying out the method of the present invention.

FIG. 2 is an explanatory diagram of a necessary operation sequence corresponding to the rotation angle of the loom cycle when the weft is stopped.

FIG. 3 is an explanatory diagram of rotation states of a drive motor of the planetary gear type ear assembly device and a drive motor of the loom on the time axis when the weft is stopped.

FIG. 4 is an explanatory diagram of a necessary operation sequence corresponding to the rotation angle of the loom cycle when the warp is stopped.

FIG. 5 is a block diagram of a control system of another embodiment.

[Explanation of symbols]

 1 planetary gear type selvage device 2 control device 3 main spindle controller 4 drive motor 5 weaving machine 9 selvedge yarn 10 warp yarn 11 weft 12 main spindle 13 drive motor 14 opening device 16 opening shaft 19 position commander

Claims (1)

[Claims] 1. A planetary gear type selvage device driven by a dedicated drive motor that rotates synchronously with the shedding shaft of the shedding device. After stopping the loom, the loom is reversely rotated to a restart position to return the shed to a predetermined position. When the opening shaft reaches the above-mentioned predetermined opening position after the drive motor is stopped and the loom is restarted, the synchronous control of the drive motor with respect to the opening shaft is stopped. A method for controlling a planetary gear type ear assembly device, which is characterized by recovering.