JPH04361646A - Operation control device for weaving machine - Google Patents

Abstract

PURPOSE:To rapidly control rise in starting and rise in abrupt stopping of weaving machine and to regulate speed in operation by simple and inexpensive constitution. CONSTITUTION:An armature 3 of an electromagnetic brake is laid through a leaf spring 13 on the side of a driving pulley 4 of weaving machine. An output shaft 15 of a differential transmission A fixing the pulley 4 of weaving machine to one input part 12 of the differential transmission with bolts 19 is inserted and immobilized to a main shaft 1 of weaving machine. A main motor 17 of weaving machine and the driving pulley 4 are connected to an endless belt 14. The other input part 9 of the differential transmission A is coupled with a regulating motor 26 provided with an electromagnetic brake by the endless belt 11 and the endless belt 11 is engaged with an auto tensioner 29.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for starting, stopping and intermittent operation of a loom.

0002

2. Description of the Related Art Conventionally, when a loom is restarted after a sudden stop, the main shaft position of the loom changes due to the cause of the sudden stop.

[0003] Many origin return control devices and methods have been considered for restarting. For example, as shown in FIG. 7, after the loom suddenly stops, the electromagnetic brake 2 is turned off, the electromagnetic tooth clutch 23 on the intermediate shaft 22 is turned on, and the loom main shaft 1 is controlled by the geared motor 20 with low rotational output. There is also a device that performs home return control and prepares by turning off the electromagnetic tooth clutch 23 and turning on the electromagnetic brake 2 to maintain the home position upon restart.

Furthermore, as an electrical control method, for example, in Utility Model Application No. 59-54588, a frequency conversion power supply device (inverter) 27 is installed from the commercial power supply, and after the loom is stopped, the electromagnetic brake 2 is turned off, and the power supply switching panel 28 By using the inverter power source, the loom main motor 17 is controlled to rotate at a low speed to perform return control to the origin, and the electromagnetic brake 2 is used to maintain the origin. Then, switch to commercial power at the switch board 28,
Devices that prepare for restart are known.

[0005]

[Problems to be Solved by the Invention] In the conventional device shown in FIG.
3 and a geared motor 20 for low speed control, the device is complicated and very expensive.

Furthermore, in the electrical control method, there is a limit to the output capacity of the power supply device 27, and a large number of looms cannot be controlled at the same time, resulting in some looms having a long waiting time.

[0007] Furthermore, there is a problem in that the wiring work becomes complicated due to the two power supply systems. Further, noise is generated between the power supply device 27 and the main electric motor 17, and there is a high risk that sensors in the loom control system will malfunction, and a noise filter is required.

[0008] These conventional techniques cannot absorb or alleviate the impact torque generated when the loom suddenly starts, runs, or suddenly stops, or the fluctuating torque during operation, resulting in generation of vibration noise and shortening the life of the loom. The present invention aims to overcome these drawbacks.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a loom main shaft drive system with a device equipped with a differential mechanism reducer and a brake, so that the main shaft drive system of a loom is provided with a device equipped with a differential mechanism reducer and a brake. By using an electric motor, the main shaft of the loom can be started,
It is configured to perform stop and intermittent operation control.

0010

[Operation] While the loom is in operation, the brake is actuated by some kind of stop signal, causing the loom to suddenly stop and maintain that state. Next, the rotation of the differential mechanism reducer is controlled by the control electric motor using a signal that corrects the deviation of the loom main shaft from the origin, and the output section of the differential mechanism reducer is decelerated by the reduction ratio, and the loom main shaft is rotated with a large torque. The rotation is controlled, and the control motor is stopped by the home return stop signal and maintains that state.

[0011] In the restart operation, the brake is turned off, and at the same time, the main electric motor is started to drive the differential mechanism speed reducer and the loom starts operating.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be explained in detail below with reference to embodiments shown in the accompanying drawings. In FIG. 1, 1a is a frame of a loom, on which a main shaft 1 of the loom is rotatably supported. A stator 2 of an electromagnetic brake is fixed to the side surface of the frame 1a with bolts.

Reference numeral 4 denotes a loom drive pulley, to the side of which an armature 3 of an electromagnetic brake is fixed with a bolt via a leaf spring 13. One of the leaf springs 13 is fixed to the armature 3, and the other is fixed to the pulley 4. The armature 3 is a stator 2 of the electromagnetic brake.
They are placed facing each other with a predetermined gap between them.

A is a known differential mechanism speed reducer, and the rotation of the first input section 9 in which a pulley is formed is decelerated by the differential mechanism and transmitted to the tubular output section 15. It is composed of

The output section 15 is inserted into the main shaft 1 of the loom and fixed to the main shaft 1 with a bolt.

The loom drive pulley 4 is fixed to the second input section 12 of the differential mechanism reduction gear A with bolts 19.

[0017] The input section 12 is connected to the differential mechanism reduction gear A.
It is fixed to the internal 5 of the unit with a bolt. 6 is an internal pin, 7 is a foil (inner tooth), 8 is a carrier pin, and 10 is an eccentric roller bearing, and these constitute a differential mechanism reduction gear A. Reference numeral 17 is a loom main motor, which is fixed to the frame 1a.

An endless belt 1 is provided between the pulley fixed to the output shaft of the main motor 17 and the loom drive pulley 4.
4 is crossed.

Reference numeral 26 denotes a control motor with a non-excitation type electromagnetic brake fixedly mounted on the frame 1a, and a pulley fixed to the output shaft of this control motor and a pulley integrally formed in the input section 9 are connected to each other. An endless belt 11 is stretched between them.

An auto-tensioner 29 is provided on the transmission path of the belt 11, and is configured to automatically adjust the tension of the belt 11.

Next, the operation of this embodiment will be explained. First, the principle of deceleration operation of the differential mechanism reducer A will be explained with reference to FIG. 1. When the input section 9 rotates once, the eccentric roller bearing 10 engaged with the input section 9 also rotates once in the same direction. 2. The foil (inner teeth) 7, which is in a state of loose rolling with the eccentric roller bearing 10, sequentially meshes with the internal pin (outer teeth) 6 while eccentrically moving (revolving).

3. In this way, the input section 9 is set to 1 as shown in Figure D.
When rotated, the inner teeth 7 deviate from the origin (Figure A) by the difference in the number of teeth from the outer teeth 6, and the foil (inner teeth) 7 rotates (rotates) in the opposite direction to the input section 9. In other words, the foil 7 revolves at high speed and simultaneously rotates at low speed. 4. Therefore, this decelerated rotation (rotation of the foil 7) is transmitted by the carrier pin 8 and becomes the rotation of the output section 15. The above is the operating principle of the known differential mechanism reduction gear.

During operation of the loom, when the coil built in the stator 2 of the electromagnetic brake is energized by a stop command due to some factor, the armature 3 is pressed against the stator 2 by electromagnetic force. As a result, the loom drive pulley 4 suddenly stops and maintains this state.

Next, the control electric motor 26 is controlled, and the rotation of its output shaft is transmitted to the input section 9 of the differential reduction gear A through the belt 11.

The rotation of the input section 9 is transmitted to the output section 15 via the differential mechanism, with the speed reduced equal to the reduction ratio of the reducer A, and the torque increased equal to the reduction ratio, and is transmitted to the loom main shaft. 1 is rotationally controlled.

The main shaft 1 of the loom is controlled by the control electric motor 26.
Several rotations are controlled to restore the longitudinal and latitudinal systems.
In addition, reverse rotation control is performed using a correction signal corresponding to the deviation from the origin and the stoppage.

Next, the electromagnetic brake is released simultaneously with the low speed inching completion signal, and the armature 3 is moved to the stator 2.
The electromagnetic brake of the control motor 26 is activated, and preparations for restart are completed.

When the output shaft of the main motor 17 rotates, this rotation causes the belt 14, the loom drive pulley 4, the input section 12,
It is transmitted to the loom main shaft 1 via the internal 5, internal pin 6, wheel 7 and output section 15.

When the main motor 17 rotates the loom drive pulley 4 and rotates the loom main shaft 1 at high speed, the input section 9
Keep the sides fixed.

In addition, the differential mechanism reducer A has a first input section 9 and a second input section 12 in addition to the above-mentioned two-speed switching drive.
Differential driving is possible in which both are driven at the same time.

In another embodiment, as shown in FIG. 6, the control motor 26 with a non-excitation type electromagnetic brake and the first input section 9 of the differential reduction gear A may be connected to a shaft capable of absorbing shocks. They are connected by a joint 30.

As the shaft joint 30, as shown in FIG.
A shaft coupling known as a centerflex coupling (trade name) in which rubber is pre-compressed or a belt tensioner known as a "rosta tensioner" (trade name) shown in FIG. 4 can be used.

[0033]

[Effects] Since the present invention is constructed as described above, it has the following effects. (1) Power saving can be achieved without the troubles caused by electrical control.

(2) The intermediate shaft electromagnetic clutch, timing belt, pulley, geared motor, etc. required in the conventional device can be omitted, resulting in cost reduction.

(3) During low-speed rotation control, only the loom main shaft can be controlled to rotate, so the loom drive pulley, belt, and loom main motor do not rotate, and GD2 can be reduced. Therefore, the capacity of the control motor can be reduced.

(4) By using the control motor in combination with the loom main motor, it is possible to quickly control the rise at startup and the fall at sudden stop. You can also control the speed while driving.

(5) Absorbs fluctuating torque and impact torque,
It can reduce vibration and noise and extend the life of the equipment.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a side view.

FIG. 3 is an external view of the shaft joint.

FIG. 4 is an external view of the shaft joint.

FIG. 5 is a diagram illustrating the principle of a differential mechanism reduction gear.

FIG. 6 is a side view showing another embodiment.

FIG. 7 is a side view of the prior art.

[Brief explanation of symbols]

1. Loom main shaft 2 Stator 3 Amateur 4 Loom drive pulley 5 Internal 6 Internal pin 7 Foil (inner tooth) 8 Carrier pin 9 Input section 10　Eccentric roller bearing 11 Belt 12 Input section 13. Leaf spring 14 Belt 15 Output section 17 Loom main motor 19 bolts 20 Geared motor 22 Intermediate shaft 23 Electromagnetic tooth clutch 24 Timing belt 26 Control motor 27 Inverter 28 Power switch board 29 Auto tensioner

Claims (5)

[Claims] Claim 1: The main shaft drive system of the loom is equipped with a device equipped with a differential speed reducer and a brake, and the main shaft of the loom is started, stopped, and moved intermittently by a main motor, a control motor, or a combination of both motors. A loom operation control device characterized by having a configuration for controlling. 2. The loom motion control device according to claim 1, wherein the differential speed reducer and both electric motors are provided with a brake mechanism. 3. The first motor, characterized in that both of the electric motors or the control electric motor are speed controllable electric motors.
The loom operation control device described in Section 1. 4. A control drive system between the output side of the control motor and the input side of the differential reduction gear is provided with a shaft joint or an auto-tensioner in which rubber is precompressed. 2. The loom operation control device according to claim 1, characterized in that: 5. In a loom operation control device that controls the rotation of a main shaft 1 of a loom using a main motor 17 and a control motor 26, a first input section 9 is linked to the control motor 26, and an output section is connected to the main shaft 1. a differential mechanism reducer connected to the main motor 17 and having a second input section 12 linked to the main electric motor 17, and an electromagnetic brake for fixing and unfixing the second input section 12 of the differential mechanism reducer. A loom operation control device characterized by: