JPS6138938Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a warp delivery control device for a loom.

Conventionally, various warp delivery devices have been used to supply warp threads to a loom, but all conventional warp delivery devices are mechanical, and the loom operation and the delivery device are synchronized. It is essential to install a transmission and a reversing mechanism as a configuration for adjustment, and the structure is complicated, which is difficult from the viewpoint of smooth operation and maintenance management of the equipment.
This was also a problem from the standpoint of installation space. In other words, in the operation of a loom, stopping, forward rotation, and reverse rotation are inevitably involved, but in performing automatic weaving,
It is essential to stop warp supply, feed out, rewind, and adjust the speed of warp sending out in response to the stoppage, forward rotation, and reverse rotation of the loom operation, and conventional means for adjusting the speed of warp sending out include: A mechanical transmission is provided on the output shaft side of the electric motor, and a mechanical rotation direction control device is further provided on the output shaft side of the mechanical transmission as the warp feeding and rewinding switching means, and a mechanical rotation direction control device is provided on the output shaft side of the mechanical transmission. The output shaft of the control device was connected to the warp beam via a reduction gear to control the warp delivery, but there is a method for controlling the mechanical transmission and the mechanical rotation direction control device. As for the configuration, an interlocking mechanism is required to link each of the above devices to the machine body,
Furthermore, a special gear mechanism is required as a braking means for stopping the warp delivery, which results in a complicated structure, which poses a problem in terms of maintenance and management.

Therefore, this idea uses a general-purpose AC motor as the drive source, installs an electromagnetic clutch/brake on the output shaft side of the AC motor, and connects the output of a variable frequency transmission (VFD) to the input of the AC motor. and providing a warp delivery control device that electrically controls warp delivery by connecting the electromagnetic clutch/brake input and the variable frequency transmission input to control signal output terminals of a loom main body, respectively,
It is an object of the present invention to eliminate the drawbacks of the conventional warp delivery device described above by omitting the mechanical control mechanism part.

An embodiment of the invention will be described with reference to the accompanying drawings. Reference numeral 1 denotes warp threads, and an arbitrary number of warp threads 1 are arranged in parallel and passed from a warp beam 2 to guide rollers 3, 4, The finished woven fabric 8 is sent to the weaving section 6 via the weaving section 5, where the warp threads are opened, the weft threads 7 are inserted, and weft beating is performed.
sent to. A dancer roll 10 engages the warp 1 between the guide rollers 4 and 5 from above, and the dancer roll 10 applies a constant tension to the warp 1 by the gravity of a weight 11 hanging from the dancer roll 10. , is linked to the actuating rod 12 of the displacement detector 13, which is a potentiometer. A rider roll 14 is in sliding contact with the outer periphery of the wound warp on the warp beam 2, and the rider roll 14 is connected to the operating rod 15.
Displacement detector 16 which is a potentiometer through
linked to. In the warp beam 2, arrow A indicates the forward rotation direction, and arrow B indicates the reverse rotation direction. (Induction motor) Linked to 20. A variable frequency transmission (VFD) 21 connected to the motor 20 by a line 21 has a forward/reverse control terminal 23 and a speed control terminal 2 as its inputs.
4, the variable frequency transmission 22
controls the output frequency on the line 21 according to the input signal value on the speed control terminal 24, and further controls the output frequency on the line 21 according to the difference in the form of the control signal on the forward/reverse control terminal 23. An example of an inverter that changes the mode of rotation to forward or reverse rotation is a product with the trade name V-FREQ. A control signal indicating forward or reverse rotation of the loom is sent from a control signal output terminal (not shown) on the loom main body.
The control signal is transmitted to the forward/reverse control terminal 23 of the transmission 22 via the line 25, control panel 26, and line 27 to determine the rotation direction of the motor 20. On the other hand, the control signal is used to determine whether the loom body is activated or deactivated. Operation (stop)
is also transmitted to the electromagnetic clutch/brake 19 via the line 25, control panel 26, and line 28 to control the operation of the electromagnetic clutch/brake 19. That is, when the loom is in operation, the electromagnetic clutch is energized,
When the demagnetization of the electromagnetic brake connects the speed reduction device 18 and the motor 20 and the loom operation stops, conversely, the electromagnetic clutch is demagnetized and the electromagnetic brake is excited, thereby connecting the speed reduction device 18 and the motor 20. At the same time, the rotation of the speed reducer 18 is stopped by braking. The dancer roll 10 applies a constant tension to the warp threads 1 using a weight 11, and moves up and down depending on the difference in the conveyance amount between the take-up and feed of the warp threads. It is detected by the displacement detector 13 connected to the line 29, the detection board 30, the line 31, and the amplification board 32 as the output of the displacement detector 13.
On the other hand, the rider roll 14 moves closer to the beam center in accordance with the decrease in the amount of wound warp remaining on the warp beam 2, and the rider roll 14 moves closer to the beam center due to the action of the operating rod 15. detected by an associated displacement detector 16, said displacement detector 1
6 outputs: line 33, detection board 34, line 35
The output signal from the displacement detector 16 and the output signal from the displacement detector 13 are processed in the amplifier board and combined into a single signal output, which is then transmitted to the amplifier board 32 via the line 36. It becomes the speed control terminal 24 input of the variable frequency transmission 22. Reference numeral 37 is a detection board connected to a power source (not shown);
Shows the lines that supply power to the amplifier board, control board, variable frequency transmission, etc.

To explain the operation of the warp delivery control device of this invention having the above configuration, when the loom main body is operating in the forward rotation direction, a control signal indicating the forward rotation operation of the loom is transmitted to the track 25, the control panel 26, the track 28, 27 to the electromagnetic clutch/brake 19 and the variable frequency transmission 22. Under the action of the control signal on the line 28, the clutch in the electromagnetic clutch/brake 19 is energized and the motor 20 and the speed reducer 18 are energized.
is connected, the control signal on the line 27 causes the variable frequency transmission 22 to rotate in the normal rotation mode, and the output frequency of the line 21 causes the motor 20 to rotate in the normal rotation direction, and the electromagnetic clutch/brake 19 , the reduction gear 18, and the drive shaft 17 to drive the warp beam 2 in the normal rotation direction, that is, in the direction of arrow A. Naturally, the outermost circumferential diameter of the wound warp of the warp beam 2 decreases during warp delivery, but in order to prevent the unit warp delivery amount from decreasing due to the decrease in the outermost circumferential diameter of the wound warp, the winding warp is A rider roll 14 is in sliding contact with the outermost circumference of the wound warp yarn, and the decrease in the diameter of the wound warp yarn is detected as a swing of the operating rod 15 by a displacement detector 16 linked to the rider roll 14. 16 output, line 33, detection board 3
4, transmitted to line 35, amplifier board 32, and line 3
6, resulting in an increase in the output frequency of the variable frequency transmission 22, which feeds back to the rotational speed of the motor 20 via the line 20 to correct the rotational speed of the motor 20. . If an inappropriate difference occurs in either the positive or negative direction between the warp delivery amount and the take-up amount, a displacement detector detects vertical movement of the dancer roll 10 disposed on the warp. 13, and as the output of the displacement detector 13, the line 2
9. The signal is transmitted to the detection board 30, the line 31, and the amplifier board 32, and is added to the signal component in the line 36, thereby increasing or decreasing the output frequency of the variable frequency transmission 22, and transmitting the signal via the line 21. feedback to the rotational speed of the motor 20.
Correct the rotation speed of 0.

If the loom body stops working, track 2
5. A stop signal (a signal indicating that the loom stops operating) is transmitted to the electromagnetic clutch/brake 19 via the control panel 26 and the line 28, and the electromagnetic clutch of the electromagnetic clutch/brake 19 is demagnetized by the stop signal. The electromagnetic brake is energized, and the warp beam 2 is stopped instantaneously by actuation of the electromagnetic clutch/brake 19.

On the other hand, when the stopped loom starts operating, the operating signal (a signal indicating the operation of the loom) is transmitted to the electromagnetic clutch/brake 19 via the line 25, control panel 26, and line 28. The electromagnetic brake in the electromagnetic clutch/brake 19 is demagnetized and the electromagnetic clutch is energized, so that the warp beam 2 starts instantaneously.

Note that when the loom body is operating in the reverse direction, the operating signal is transmitted to the electromagnetic clutch/brake 19 via the line 28, and the reversing signal (signal indicating the reverse operation of the loom) is variable via the line 27. The frequency is transmitted to the transmission device 22, and the electromagnetic brake of the electromagnetic clutch/brake 19 is demagnetized.
Since the electromagnetic clutch is energized and the output frequency on the line 21 is set in a reverse mode, the warp beam 2 is operated in the reverse direction, ie in the direction of arrow B, and the warp threads 1 are unwinded.

The tension value of the warp threads 1 can be set to an appropriate value depending on the weight of the weight 11 to which the dancer roll 10 is attached, but a limit switch is installed at the upper and lower limits of the operation of the dancer roll 10, and If a configuration is adopted in which the motor is stopped by contact with the dancer roll 10, the operation of the dancer roll 10 can be limited within a certain range.

The warp delivery control device of this invention uses a simple electric circuit to control warp delivery, controls the output rotation of a general-purpose AC motor by changing the frequency, and stops and operates using an electromagnetic clutch and brake. Because of this control, it is possible to change the speed over a wide range with constant torque characteristics, and its operation is smooth and maintenance-free for a long time. Forward and reverse rotation can be controlled by external signals, and it is synchronized with the operation of the loom itself. Since the motor is a general-purpose AC motor, it is easy to manufacture and install, takes up little space, operates reliably, is easy to maintain, and has excellent technical performance. be effective.

[Brief explanation of drawings]

The drawing is an operational system diagram showing an embodiment of this invention. Explanation of symbols, 1... warp, 2... warp beam,
7... Weft, 8... Woven fabric, 10... Dancer roll, 13... Displacement detector, 14... Rider roll, 16... Displacement detector, 17... Drive shaft, 18
... Reduction device, 19 ... Electromagnetic clutch/brake, 20 ... AC motor, 22 ... Variable frequency transmission device, 26 ... Control panel, 30 ... Detection board, 3
2...Amplification board, 34...Detection board.

Claims (1)

[Scope of utility model registration request] The electric motor that drives the warp beam 2 is an AC motor 20, and an electromagnetic clutch/brake 19 is installed on the output shaft of the AC motor 20, and the electric motor is connected to the warp beam 2 via the electromagnetic clutch/brake 19. The output of the transmission 22 is connected to the input of the AC motor 20, and the control signal output terminal of the loom body is connected to the input of the electromagnetic clutch/brake 19 and the forward/reverse control terminal 23 of the variable frequency transmission 22 through a suitable circuit. The output of displacement detectors 13 and 16 for detecting various changes on the warp is connected to the speed control terminal 24 of the variable frequency transmission 22 through an appropriate circuit. Control device.