JP2003213546A - Method and equipment for driving warp transfer device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for driving a warp transfer device, capable of preventing an accident of breakage of the warp, when motors of the warp transfer device are rotated in the direction of increasing tension of the warp on the occasion when a loom is operated in a manner other than its ordinary operation. <P>SOLUTION: In this method for driving the warp transfer device equipped with the motors which are independent of a main shaft motor of the loom, the motors of the warp transfer device are each subjected to speed control according to a command speed, and then subjected to torque control according to a command torque, when the motors are rotated in the direction of increasing the tension of the warp on the occasion when the loom is operated in the manner other than the ordinary operation. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for driving a warp transfer device that contributes to the transfer of warps such as a woven fabric winding device and a warp delivery device.

[0002]

2. Description of the Related Art In a loom, a warp yarn is fed from a warp yarn feeding device, and a woven fabric is wound around a woven fabric winding device to convey the warp yarn. In this type of loom,
As a drive source for the warp yarn feeding device and the woven fabric winding device, there is one that uses an electric motor independent of the main shaft motor of the loom.

In a loom equipped with a feed motor and a take-up motor independent of the main shaft motor of the loom, a speed command is issued when both motors are driven to transfer the warp yarn during a non-normal operation (weaving operation) of the loom. The two motors are driven correspondingly, and the warp tension during warp transfer is detected, and when the detected warp tension exceeds the set tension, the feed motor or the take-up motor is stopped, and the excess force acting on the warp is caused. A technique for preventing warp breakage due to tension has been proposed (JP-A-2-269841).

In this technique, the tension of a warp is monitored by a tension sensor while the loom is manually operated for inching or reversing, and when the detected warp tension reaches a set tension, the woven fabric winding device is detected. Alternatively, the warp delivery device is stopped. The warp tension is detected based on the displacement of a member such as a tension roller arranged upstream of the dropper in the warp transfer direction.

[0005]

However, in the above-mentioned prior art, since the tension of the warp is detected on the upstream side in the warp moving direction from the position where the dropper is arranged, the warp tension is increased when the machine is hung or when the warp is connected. When a knot passes through a dropper, a heddle, a reed, etc. all at once, even though a high tension acts on the warp, the high tension is not transmitted to the warp portion on the upstream side of the dropper,
Therefore, it is not detected by the tension sensor. For this reason,
On the upstream side of the arrangement position of the dropper, heddle, reed, etc.,
There remains the risk of warp breakage.

It is an object of the present invention to prevent a yarn breakage accident when the electric motor of the warp transfer device is rotated in a direction in which the warp tension increases during the normal operation of the loom.

[0007]

SOLUTION, OPERATION, AND EFFECT The method for driving a warp transfer device according to the present invention provides a command when rotating an electric motor independent of a main shaft motor of a loom in a direction in which the warp tension increases except during normal operation of the loom. It includes a first driving step of controlling the speed of the electric motor of the warp transfer device according to the speed, and a second driving step of thereafter controlling the torque of the electric motor according to the command torque.

A drive device for a warp transfer device according to the present invention comprises:
A manual operation unit that receives a push button signal and outputs a control mode signal and a signal associated therewith according to the received push button signal, and a speed control mode that receives the control mode signal and corresponds to the received control mode signal And a drive circuit for selecting one of the torque control modes and driving the electric motor in the selected control mode. The manual operation unit receives a rotation operation signal for rotating the electric motor in a direction in which the warp tension increases, receives a loom state signal corresponding to a time other than during the normal operation of the loom, and according to the received rotation operation signal, A signal corresponding to the speed control mode is output as the control mode signal in order to bring the electric motor into the constant speed rotation state, and then the control mode signal is switched from the speed control mode to the torque control mode. The warp transfer device here includes at least one of a warp delivery device and a woven fabric winding device.

When the electric motor is rotated in a direction in which the warp tension increases in a time other than the normal operation of the loom, the electric speed of the electric motor of the warp transfer device is initially controlled, and then the speed control is switched to the torque control. Therefore, the warp transfer device is surely started by the speed control and shifts to the torque control. Further, when the overtension acts on the warp, the torque acting on the electric motor increases, so that the warp transfer device can be stopped before the warp is cut, and the occurrence of a thread breakage accident that occurs in the prior art can be prevented. can do.

The switching from the first drive step to the second drive step may be performed based on the elapsed time from the start of control, or based on the actual value of the rotation amount or rotation speed of the electric motor. You may go. Further, the value of the command torque can be set in a range where a warp cutting accident does not occur.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, in a loom 10, a warp yarn 12 is fed from a delivery beam 14 around which the warp yarn 12 is wound, a tension roller 16 and a plurality of healds 18.
And it is connected to the cloth 22 through the reed 20. The woven woven fabric 24 reaches the cloth winding roller 28 from the cloth fell 22 through the guide roller 26, and is sent out to the cloth winding beam 32 by the clothes winding roller 28 and the pair of press rolls 30 and is wound up on the cloth winding beam 32. To be

The delivery beam 14 is rotated by a delivery motor 34, which is an electric motor such as a servomotor, via a speed reducer 36 to deliver a plurality of warp yarns 12 in the form of warp sheets. The clothes winding roller 28 is rotated by a winding motor 38, which is an electric motor such as a servo motor, and sends the woven cloth 24 to the cloth winding beam 32.

The delivery motor 34 is driven by the warp delivery device having the function of the warp transport device in response to the rotation of the main shaft (not shown) of the loom, and the winding motor 38 is driven by the woven fabric winding device. Is driven according to the rotation of the.

Although not shown, each heddle 18 is reciprocally moved up and down by a motion converting mechanism that receives a rotational movement of a main shaft motor or a dedicated motor to open the warp 12 up and down. The reed 20 is oscillated by a motion converting mechanism that receives a rotational motion of a main shaft motor or a dedicated motor, and strikes the weft yarn inserted in the opening of the warp yarn 12 to the cloth fell 22.

The weaving machine 10 selectively moves the warp 12 forward or backward in the moving direction by feeding the warp 12 out of the delivery beam 14 or winding it around the delivery beam 14 by rotating the delivery motor 34 in the forward or reverse direction. Can be made. The tension of the warp 12 is such that the warp 12 has a delivery beam 1
It decreases when it is unrolled from 4 and increases when it is taken up by the delivery beam 14.

The warp delivery device for driving the delivery motor 34 includes an operation control section 40 for controlling the rotation speed of the delivery motor 34 during normal operation (during weaving operation) and a manual operation of the delivery motor 34 at times other than during normal operation. Manual operation unit 42
And a drive circuit 44 for driving the delivery motor 34.

The operation signal S1 is a signal indicating whether or not the loom 10 is operating, and is turned on when the loom 10 is operating and turned off when the loom 10 is stopped. Such an operation signal S1 is supplied to the operation control unit 40 from a main controller (not shown).

The tension acting on the warp yarn 12 is detected by the tension sensor 46 as a load acting on the tension roller 16, and is supplied to the operation control section 40 as a tension signal S2.

The winding diameter of the delivery beam 14, which gradually decreases as the warp 12 is delivered, is detected by the winding diameter sensor 48 and supplied to the operation control section 40 and the manual operation section 42 as a winding diameter signal S3. The rotation amount of the delivery motor 34 is detected by the encoder 50 and supplied to the drive circuit 44 as a rotation amount signal θ.

The stop signal S4 is a signal for stopping the loom 10 due to the occurrence of a stop cause such as a weft insertion error or warp breakage, and is a signal which is turned on while the loom is stopped. It is supplied from the control device to the manual operation unit 42.

The operation control section 40 is connected to a data setter 52 in which data necessary for tension control of the warp 12, such as a target warp tension, a target driving density, a target rotational speed of the loom, etc., is preset.

During the normal operation of the loom (while the ON operation signal S1 is input), the operation control section 40 keeps various data set in the data setter 52 and the tension signal S2.
, And the target warp tension and tension signal S2 based on the winding diameter signal S3.
A command signal (speed command signal) S5 representing a speed command value that eliminates the deviation from is output, and a control mode signal (speed control mode signal) S6 for controlling the speed of the delivery motor 34 is output.

The manual operation section 42 is provided with a forward rotation button 54 and a forward rotation button 54 so that the delivery motor 34 can be manually operated at times other than the normal operation of the loom (when the ON stop signal S4 is input). It is connected to the reverse button 56 and also to the data setter 52.

Each of the forward rotation button 54 and the reverse rotation button 56 is composed of a push button switch, and is used for the delivery motor 34 when the machine is raised, when the machine is hung up, when thread is connected, when weaving, and the like.
(In other words, when the warp beam 14 needs to be rotated normally or reversely, it is pressed by the operator.

When the forward rotation button 54 is pressed, the forward rotation button signal S54 is turned on to rotate the feed motor 34 in the normal direction. When the reverse button 56 is pressed, the reverse button signal S56 is turned on to reverse the feed motor 34 during that time.

The manual operation section 42 receives various data set in the data setting device 52, the winding diameter signal S3, and the forward rotation button signal S54 while the ON stop signal S4 is input.
, A reverse rotation button signal S56, a speed command value, and a torque command value, based on the speed command value or the torque command value for driving the delivery motor 34 by a manual operation. Signal) S7 and a control mode signal (speed control mode signal or torque control mode signal) S8 representing the control mode are output.

The command signals S5 and S7 are supplied to the drive circuit 44 via the adder 58, and the control mode signals S6 and S8 are supplied to the drive circuit 44. However, in reality, the command signal S5 and the control mode signal S6 are supplied to the drive circuit 44 only during the normal operation, and the command signal S7 and the control mode signal S8 are supplied only when the loom is not in the normal operation. 44. The speed command value and the torque command value used in the manual operation unit 42 are preset in the manual operation unit 42 in the illustrated example, but may be preset in the setter 52.

The drive circuit 44 receives the command signals S5, S7, the control mode signals S6, S8, and the rotation angle signal θ to drive the feed motor 34, and detects the current flowing through the feed motor 34. A current sensor 62 for supplying the detection signal S9 to the motor controller 60 is provided.

The motor controller 60 controls the feed motor 34 based on various input signals to control mode signals S6 or S8.
In the control mode according to the above, a current for forward or reverse rotation is output to the delivery motor 34 according to the command signal S5 or S7. The motor controller 60 is configured as a servo control circuit so as to control the drive of the delivery motor 34.

During normal operation of the loom, a command signal (speed command signal) S5 indicating a speed command value and a control mode signal (speed control mode signal) S6 indicating a speed control mode are supplied from the operation control unit 40 to the motor controller 60. To be done. As a result, the motor controller 60 rotates the feed motor 34 in the speed control mode in the forward direction while controlling the speed according to the command signal S5 from the operation control unit 40.

When the forward rotation button 54 is pressed while the loom is stopped, the feed motor 34 is rotated in the forward direction (that is,
A command signal S7 representing a speed command value and a control mode signal S8 representing a speed control mode are supplied from the manual operation section 42 to the motor controller 60, such as when rotating in a direction in which the tension acting on the warp 12 decreases. This allows
While the forward rotation button 54 is being pressed, the motor controller 60 rotates the delivery motor 34 in the forward direction while controlling the speed according to the command signal S7. As a result, the warp 12 is unwound from the warp beam 14. When the pressing of the forward rotation button is stopped, the feed motor 34 is stopped.

On the other hand, the reverse button 5 is pressed while the loom is stopped.
When 6 is pressed, first, the command signal S7 representing the speed command value and the speed control mode are expressed so that the delivery motor 34 is rotated in the reverse direction (that is, when the tension acting on the warp yarn 12 is increased). The control mode signal S8 is supplied from the manual operation section 42 to the motor controller 60,
Then, a command signal (torque command signal) S7 representing a torque command and a control mode signal (torque control mode signal) S8 representing a torque control mode are sent from the manual operation section 42 to the motor controller 60 instead of the speed command signal and the speed control mode signal. Supplied.

As a result, the motor controller 60 is
While the reverse rotation button 56 is being pressed, the delivery motor 34 is reversely rotated while performing speed control according to the speed command value according to the command signal S7, and then the delivery motor 34 is commanded by the command signal S7.
The reverse rotation is performed while controlling the torque according to the torque command value corresponding to. As a result, the warp 12 is wound around the warp beam 14. When the pressing of the reverse button 56 is stopped, the feed motor 34 is stopped.

As described above, the control during the normal operation and the control in the direction for loosening the warp tension by the manual operation during the stop (forward rotation direction) are performed by supplying the speed command signal to the motor controller 60. The motor 34 is normally rotated in the speed control mode.

On the other hand, in the control in the direction of increasing (stretching) the warp tension (reverse direction) by manual operation during stop, the speed command signal is supplied to the motor controller 60 to control the speed of the delivery motor 34. Reverse in mode,
Then, the torque command signal is supplied to the motor controller 60, so that the delivery motor 34 is rotated in the torque control mode.

Table 1 shows the relationship between the command signal input to the motor controller 60 and the control mode of the feed motor 34 by the motor controller 60.

Next, the forward rotation button 5 while the loom is stopped
The operation of the manual operation unit 42 by the 4 or the reverse rotation button 56 will be described in more detail.

While the loom 10 is stopped, the operation control unit 40 does not output the signals S5 and S6. Therefore, the drive circuit 4
Reference numeral 4 drives the delivery motor 34 based on the signals S7 and S8 supplied from the manual operation unit 42, and if the signals S7 and S8 are not output, the delivery motor 34 is stopped in the stop control mode.

When the forward rotation button 54 is pressed while the loom is stopped, the manual operation section 42 outputs the speed command signal and the speed control mode signal as the command signal S7 and the control mode signal S8, respectively, during that time. The speed command signal at this time is
So that the moving speed of the warp 12 becomes a predetermined value,
It is determined based on various data of the data setter 52 and the winding diameter signal S3. As a result, the drive circuit 44 causes the delivery motor 3
4 is rotated normally while controlling the speed.

When the reverse button 56 is pressed,
The manual operation unit 42 first outputs the speed command signal and the speed control mode signal as the command signal S7 and the control mode signal S8 for a predetermined time, and then outputs the torque command signal and the torque control mode signal to the command signal S7 and the control mode signal S8, respectively. Output as.

The speed command signal when the reverse button 56 is pressed down is various data of the data setter 52 and the winding diameter signal S so that the moving speed of the warp 12 becomes a predetermined value.
It is decided based on 3 and. In addition, the torque command signal is the warp 1
It is determined based on various data of the data setter 52 and the winding diameter signal S3 so that the tension of 2 does not exceed the upper limit allowable value.

As a result, when the reverse rotation button 56 is pressed, the drive circuit 44 first reverses the feed motor 34 by speed control, and then reverses it by torque control after a lapse of a predetermined time.

When the forward rotation button 54 and the reverse rotation button 56 are pressed and then the pressing is stopped, the manual operation section 42 is pressed.
Is the control mode signal S8 because the button input is turned off.
Is switched from the speed control mode signal or the torque control mode signal to the stop control mode signal. As a result, the drive circuit 44 stops the delivery motor 34.

The timing for switching from the speed control to the torque control is a period determined in consideration of the fact that the feed motor 34 starts rotating after the reverse rotation button signal is input and the control can be switched to the torque control. It is set in the operation unit 42.

Such a period may be determined based on the elapsed time from the start of the speed control, or the delivery motor 34.
It may be determined based on the actual value of the rotation amount or the rotation speed. Further, the value of the torque command signal (torque command value) is set in a range in which a warp cutting accident does not occur.

The electric motor generally does not rotate when the starting torque is insufficient. Therefore, when the torque command value (warp yarn tension value) is too small, the delivery motor 34 remains stopped. On the contrary, when the torque command value is too large, the rotation speed of the delivery motor 34 is not controlled, and there is a risk of runaway rotation depending on the inertia amount of the drive system.

However, when the control of the feed motor 34 is switched to the torque control after the speed control when the reverse rotation button 56 is pressed as described above, the feed motor 34 is surely started by the speed control. When shifting to torque control,
The delivery motor 34 is controlled so that the torque generated therefrom does not exceed the torque command value.

The torque command value is set to an appropriate value within the range in which the warp is not cut, and this prevents the occurrence of a warp cutting accident due to the fact that the warp continues to be wound by mistake with high tension.

FIG. 2 shows torque in the case 1 in which the reverse button 56 is pressed between times t1 and t2, the case 2 which is pressed between times t1 and t4, and the case 3 in which the reverse button 56 is pressed between times t1 and t5. An example of changes in the speed of the feed motor and the warp tension when the mode signal is set to change to ON at time t3 is shown.

In Case 1, since the depression of the reverse rotation button 56 is released before time t3, the delivery motor is reversely rotated by the speed control and the stop control is performed from time t2. However, in Cases 2 and 3, the depression of the reverse rotation button 56 is released after the time t3, respectively.
The delivery motor is switched to the torque control from the time t3 to rotate in the reverse direction, and then the stop control is performed from the times t4 and t5. More specifically, in case 3, after the time t4,
The warp tension gradually increases, and eventually the warp tension and the output torque of the delivery motor balance each other. As a result, the delivery motor is brought into a stopped state, and thereafter, stop control is performed from time t5.

FIG. 3 shows an embodiment of the manual operation section 42 for switching from speed control to torque control after a certain time has elapsed from the time when the reverse rotation button 56 was pressed as described above, and FIG. 4 shows such a manual operation. An example of the waveform of each signal in the unit 42 is shown.

The stop signal S4 is supplied to one input terminal of the AND circuits 70 and 72, the forward rotation button signal S54 is supplied to the other input terminal of the AND circuit 70, and the reverse rotation button signal S56 is supplied to the other input terminal of the AND circuit 72. It is supplied to the input terminal, one input terminal of the AND circuit 74, and one input terminal of the NOR circuit 76.

The speed command value V1 and the torque command value Tq1 used when the feed motor is rotated in the reverse direction are set in the setters 80 and 82 connected to the reverse rotation command output unit 78, respectively. The speed command value V2 used when the delivery motor is rotated in the normal direction is set by the setter 86 connected to the normal rotation command output unit 84.
Is set to.

The output signal of the AND circuit 70 is the NOR circuit 7
It is supplied to the other input terminal of 6 and the forward rotation command output unit 84. On the other hand, a speed control mode signal S84 when the forward rotation button 54 is pressed is output from the manual operation unit 42.
The output signal of the AND circuit 72 is supplied to the switching signal generator 88.

The switching signal generator 88 is supplied to an on-delay timer 92 which outputs an on-signal after a lapse of time T1 set in the setter 90 from the rise of the output signal of the AND circuit 72. The output signal of the on-delay timer 92 is supplied to the other input terminal of the AND circuit 74 via the logic inverter 94.

The ON signals obtained from the outputs of the AND circuit 74, the on-delay timer 92 and the NOR circuit 76 are the speed control mode signal S81, the torque control mode signal S82 and the push button not pressed when the reverse button is pressed, respectively. Stop control mode signal S83
Is output from the manual operation unit 42. The speed control mode signal S81 and the torque control mode signal S82 are also supplied to the reverse rotation command output unit 78.

When the forward rotation button signal S54 is turned on while the loom is stopped, the manual operation portion 42 outputs the speed instruction value V2 as the instruction signal S7 from the forward rotation instruction output portion 84, and
Speed control mode signal S84 output from the AND circuit 70
Is output as a control mode signal.

When the reverse rotation button signal S56 is turned on while the loom is stopped, the manual operation section 42 outputs the output signal from the AND circuit 74 because the output signal of the on-delay timer 92 is off during the time T1 thereafter. The speed control mode signal S81 is output as a control mode signal. During this time, the manual operation unit 42 causes the reverse rotation command output unit 78 to output the speed command value V1 as the command signal S7.

When the time T1 has elapsed since the reverse button signal S56 was turned on, the on-delay timer 9
Since the output signal of No. 2 is turned on, the manual operation unit 42 outputs the torque control mode signal S82 obtained as the output of the on-delay timer 92 as a control mode signal. During this period, the manual operation unit 42 causes the reverse rotation command output unit 78 to output the torque command value Tq1 as the command signal S7.

When the forward rotation button signal S54 is turned off after being turned on and when the reverse rotation button signal S56 is turned off after torque control, the output signal of the NOR circuit 76 is turned on. Outputs the stop control mode signal S83 obtained at the output of the NOR circuit 76 as a control mode signal. During this period, the manual operation section 42 does not output the command signal S7.

FIG. 5 shows an embodiment of the switching signal generator 88 in the case of determining the switching timing from the speed control to the torque control based on the actual value of the rotation amount of the feed motor.

In the switching signal generator 88 shown in FIG. 5, when the reverse button is pressed while the loom is stopped, the integrator 100 is operated by the output signal of the AND circuit 72 to output the rotation amount signal θ of the feed motor. The integrated value is integrated, and the comparison circuit 102 compares the integrated value with a rotation amount threshold value preset in the threshold value setting unit 104.

The rotation amount threshold value is a value corresponding to the switching timing from speed control to torque control. Therefore, the comparison circuit 1
02 outputs an ON or OFF signal depending on whether or not the integrated value has reached the rotation amount threshold value.

Specifically, the output signal of the comparison circuit 102 is kept off unless the integrated value reaches the rotation amount threshold value. As a result, the manual operation section 42 outputs the speed control mode signal. However, when the integrated value reaches the rotation amount threshold value, the output signal of the comparison circuit 102 is turned on. As a result, the manual operation section 42 outputs the torque control mode signal S82.

FIG. 6 shows an embodiment of the switching signal generator 88 for determining the switching timing from speed control to torque control based on the actual value of the rotation speed of the feed motor.

The switching signal generator 88 shown in FIG. 6 converts the rotation amount signal θ of the delivery motor into the rotation speed of the delivery motor in the F / V converter 110, and supplies the converted rotation speed to the switch 112. There is. In the switching signal generation unit 88, when the reverse rotation button is pressed while the loom is stopped, the switch 112 is operated by the output signal of the AND circuit 72 and the rotation speed from the F / V converter 110 is compared with the comparison circuit 114. And the comparison circuit 114 compares it with a rotation speed threshold value preset in the threshold value setting unit 116.

The rotation speed threshold value is a value corresponding to the switching timing from speed control to torque control. Therefore, the comparison circuit 114 outputs an ON or OFF signal depending on whether or not the rotation speed of the delivery motor has reached the rotation speed threshold value.

Specifically, the output signal of the comparison circuit 114 is kept off when the rotation speed of the delivery motor does not reach the rotation speed threshold value. Thereby, the manual operation unit 42
Outputs a speed control mode signal. However, when the rotation speed of the delivery motor reaches the rotation speed threshold value, the comparison circuit 114
The output signal of turns on. Thereby, the manual operation unit 42
Outputs an ON torque control mode signal S82.

In the above-mentioned embodiment, the forward rotation button signal or the reverse rotation button signal is generated while the forward rotation button or the reverse rotation button is pressed. However, since the forward rotation button or the reverse rotation button is pressed, The forward rotation button signal or the reverse rotation button signal may be generated for a predetermined time.

Further, instead of generating the operation command signal composed of the forward rotation button signal and the reverse rotation button signal by the push button, an operation instruction signal corresponding to such a forward rotation rotation signal signal and a reverse rotation button signal is output from a controller (not shown). Command, for example, it may be automatically generated by a weaving command device to drive the feed motor.

The present invention may be applied not only to the warp yarn feeding device but also to the woven fabric winding device, or may be applied to both the warp yarn feeding device and the woven fabric winding device.

When the present invention is applied to the fabric winding device, the electric motor to be controlled and driven is the winding motor 38 shown in FIG.
The direction in which the warp tension increases is the direction in which the woven fabric is wound, that is, the forward rotation direction of the winding motor. In this case, the winding motor 3
8 is driven in synchronization with the rotation of the loom, and the operation control unit 40 in FIG. 1 outputs the speed command in synchronization with the rotation of the loom without using the tension signal S2 and the winding diameter signal S3. Good.

When the present invention is applied to both the warp yarn feeding device and the woven fabric winding device, the corresponding electric motor is driven to rotate in the normal direction by both the warp yarn feeding device and the woven fabric winding device during normal operation and normal rotation. During the reverse rotation operation, the corresponding electric motors may be reversely driven by both the warp delivery device and the woven fabric winding device.

Specifically, when both the woven fabric winding device and the warp yarn feeding device are rotated in the normal direction at times other than the normal operation of the loom, the speed control and the torque control according to the present invention are performed. In addition, when both the fabric winding device and the warp yarn feeding device are reversed, the switching between the speed control and the torque control according to the present invention can be applied to the warp yarn feeding device.

When removing looseness of the woven fabric, the technique of switching between the speed control and the torque control according to the present invention may be applied to only one of the warp feeding device and the woven fabric winding device. Further, the switching technology between the speed control and the torque control according to the present invention can be applied not only to the control during the stop of the loom but also to the control technology for moving the cloth fell position during the stop of the loom or at the start of starting. it can.

The present invention is not limited to the loom in which the control during the normal operation of the loom and the control during the manual operation are performed by the same device.
The present invention can also be applied to a loom in which control during normal operation of the loom and control during manual operation are performed by separate devices.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the invention.

[0078]

[Table 1]

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a main part of a loom including a drive device according to the present invention.

FIG. 2 is a diagram showing a waveform of an electric signal in the driving device shown in FIG.

FIG. 3 is a diagram showing an embodiment of a manual operation unit in the drive device shown in FIG.

4 is a diagram showing a waveform of an electric signal in the manual operation section shown in FIG.

FIG. 5 is a diagram showing another embodiment of the switching signal generation unit in the manual operation unit shown in FIG.

FIG. 6 is a diagram showing still another embodiment of the switching signal generation unit in the manual operation unit shown in FIG.

[Explanation of symbols]

10 loom 12 warp 14 Outgoing beam 16 tension roller 28 Clothes Roller 32 winding beam 34 delivery motor 36 reducer 38 Take-up motor 50 encoder 60 ammeter

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Jun Takashima             5-18-18 Nomachi, Kanazawa, Ishikawa Prefecture Tsudakoma             Industry Co., Ltd. F-term (reference) 4L050 CA02 CA10 EA01 EA11 EB01                       ED02 ED03 ED23 ED37 ED38

Claims (5)

[Claims] 1. A method for driving a warp transfer device including an electric motor independent of a main shaft motor of a loom, wherein a command speed is used when the electric motor is rotated in a direction in which a warp tension increases during a time other than normal operation of the loom. A driving method for a warp transfer device, comprising: a first driving step for controlling the speed of the electric motor in accordance with the above; and a second driving step for thereafter controlling the torque of the electric motor in accordance with the command torque. 2. The driving method according to claim 1, wherein the switching from the first driving step to the second driving step is performed according to an elapsed time from the start of control. 3. The driving method according to claim 1, wherein the switching from the first driving step to the second driving step is performed by an actual value of a rotation amount or a rotation speed of the electric motor. 4. The driving method according to claim 1, wherein the value of the command torque is set in a range in which a warp cutting accident does not occur. 5. A drive device for a warp transfer device comprising an electric motor independent of a main shaft motor of a loom, which receives a push button signal and outputs a control mode signal and a signal associated therewith in accordance with the received push button signal. And a drive circuit that receives the control mode signal, selects one of a speed control mode and a torque control mode in response to the received control mode signal, and drives the electric motor in the selected control mode. The manual operation unit receives a rotation operation signal for rotating the electric motor in a direction in which the warp tension increases, receives a loom state signal corresponding to a time other than the normal operation of the loom, and receives the rotation operation signal. In accordance with the above, a signal corresponding to a speed control mode is output as the control mode signal to bring the electric motor into a rotating state, and then the control mode signal is output. Switching from speed control mode to torque control mode, the drive device of the warp transfer device.