JP2673451B2 - Loom operation method - Google Patents

Description

The present invention relates to an operating method for starting a stopped loom.

(Prior Art) When a loom that has been stopped or stopped during weaving is restarted, due to a transient lack of beating force at the time of start-up, uneven density of wefts, that is, a stopped step, occurs in the product, that is, the woven fabric. Easy to form. This stoppage significantly reduces the commercial value of the woven fabric.

As one of the methods for preventing the formation of the stop stage, a so-called blank beating method has been proposed in which the beating device is operated while the weft inserting device is stopped until the beating force reaches a predetermined value. (Japanese Patent Laid-Open No. 59-21751). However, in this blank beating method, when the blank is beaten, the reed beating device is operated in a state where the weave is maintained at the beating position where the reed is beaten. The weft threads on the front part of the cloth become dense.

As another method of preventing the formation of the stop stage, after the main shaft of the loom is reversely rotated in advance and the weft inserting device is stopped, the rotation speed of the main shaft matches the reverse rotation speed. There is a method of causing the reed to perform a blank hitting motion by rotating it normally until it comes to a normal state, and then operating the loom normally.
-124651 publication). However, in this method, the weaving cloth is moved to the side of the warp feeding device which is behind the beating position by the reverse rotation of the main shaft, so that the weaving cloth is beaten during the idle driving motion, resulting in restarting. The weft threads on the front side of the fabric become dense.

(Problem to be Solved) It is an object of the present invention to provide a method for operating a loom, which can prevent the weft yarns from becoming coarse and dense in a portion before weaving at the time of restart.

(Means for Solving the Problem, Action and Effect of the Invention) An operating method for starting a loom in a stopped state according to the present invention is to retreat a cloth fell from a beating position to a position in front thereof and While stopping, the blanking motion is performed until the beating force reaches a predetermined value, the cloth fell is returned to the beating position, and then the normal operation of the loom is started.

The beating force gradually increases due to the blank beating motion of the reed,
Before weaving, the beating force is not moved to the beating position until the beating force reaches a predetermined value. When the beating force reaches a predetermined value, normal operation is started with the cloth fell returned to the beating position.

According to the present invention, since the cloth fell is not beaten during the blank beating motion, it is possible to prevent the phenomenon that the weaving density becomes large due to the blank beating motion, and the stop caused by the lack of the beating force. Generation of steps can be prevented.

The weaving cloth may be evacuated before starting the loom, or may be moved to the front of the weaving cloth at the start of the idle driving motion and may be evacuated by the first beating operation. In short, it is sufficient to retract the weaving cloth so that the reed does not swing to the weaving cloth during the beating operation during the blanking motion.

The weaving cloth can be stopped at the front position during the idle striking motion, and the weaving cloth can be moved to the reed cutting position at the start of normal operation after the beating force reaches a predetermined value. In addition, the weave may be gradually moved toward the beating position during the blanking motion so that the weave reaches the beating position when the beating force reaches a predetermined value.

It is preferable that the main shaft of the loom is reversely rotated a predetermined number of times prior to the idle driving motion, the main shaft is normally rotated to perform the idle driving motion, and the shedding device of the loom is operated in synchronization with the main shaft. Thereby, the phase adjustment of the aperture device is automatically performed.

Before weaving, it can be moved by at least one of a winding device for the woven fabric and a feeding device for the warp yarn. Further, whether or not the beating force has reached a predetermined value can be determined based on the counted value by counting the number of blank hits or the number of rotations of the spindle during the blank hitting motion.

(Example) Referring to FIG. 1, a loom 10 includes a delivery beam 14 around which a plurality of warp threads 12 are wound. The warp yarn 12 fed from the delivery beam 14 is supplied to the weaving portion via a tension roll 16 which maintains the tension of the warp yarn at a predetermined value. Warp 12
In the weaving section, an opening is formed by a plurality of healds 18, a weft 20 is put in the opening, and the weft is before weaving with a reed 22.
By being struck on 24, it is woven into a woven fabric 26. The woven cloth 26 is wound around a cloth winding beam 36 via a guide roll 28, a pressed beam 30, a take-up roll 32 and a guide roll 34.

The delivery beam 14 is transmitted to the gear mechanism 40 by the delivery motor 38.
And the delivery motor 38 is rotated forward or backward by the electric power output from the drive circuit 42. The drive circuit 42, a signal output from the sending control device 44,
A signal obtained by adding the output signal of the speedometer 46, which generates a signal having a voltage value corresponding to the rotation speed of the sending motor 38, at the addition point, that is, at the adding circuit 48, is supplied as a control signal.

A load cell 50 for generating an electric signal corresponding to the tension of the warp 12 is connected to the tension roll 16. The output signal of the load cell 50 is supplied to the sending control device 44. The delivery control device 44 is controlled by the main control device 52 so that the tension of the warp yarn 12 becomes constant, and the delivery motor is delivered.
A signal having a voltage value for rotating 38 is output to the adding circuit 48.

The motor 38 is accelerated or decelerated by a value corresponding to the voltage value supplied from the adder circuit 48 to the drive circuit 42.
It is controlled by the drive circuit 42.

Each heddle 18 is moved by a cam mechanism 56 that is rotationally driven by an opening motor 54. Each of the opening motors 54 is normally or reversely rotated by the electric power output from the drive circuit 60 controlled by the opening control device 58.

The weft yarn 20 is supplied to the weft insertion device 64 from the length measurement storage device 62 shown in FIG. The length measurement storage device 62 and the weft insertion device 64 are controlled by a weft insertion control device 66 shown in FIG. The weft 20 is fed from the yarn feeder 68 of the length measuring and storage device 62,
It is supplied to the weft inserting device 64 through the inside of the yarn guide 72 rotated by the drum motor 70 and the drum for measuring and storing 74.

During length measurement, the weft yarn 20 is locked by a pin 78 operated by an electromagnetic solenoid 76, and is wound and stored around the outer peripheral surface of the drum 74 by the rotation of the yarn guide 72. On the other hand, at the time of weft insertion, the weft yarn 20 is released from the pin 78, and is ejected together with the fluid from the main nozzle 80 of the weft insertion device 64 into the warp yarn opening. Weft insertion device 64
Includes a plurality of sub-nozzles 82 for ejecting a fluid that advances the weft yarn 20 in a predetermined direction during weft insertion.

The reed 22 is operated by the main shaft 84 of the loom 10. Spindle 84
Is rotated by a spindle motor 86 via a coupling mechanism 88. The main shaft motor 86 is normally or reversely rotated by the drive circuit 90.

The take-up roll 32 is rotated by a winding motor 92 via a gear mechanism 94. The winding motor 92 is normally or reversely rotated by the drive circuit 96, and the drive circuit 96 is controlled by the winding control device 98. An encoder 100 that generates a pulse signal having a frequency corresponding to the rotation speed of the motor is attached to the winding motor 92. The output signal of the encoder 100 is supplied to the winding control device 98 for adjusting the winding speed of the woven fabric 26 to a predetermined value.

An encoder 102 that generates a pulse signal having a frequency corresponding to the rotation speed of the spindle is connected to the spindle 84.
The output signal of the encoder is supplied to the main control device 52, the shed control device 58, the weft insertion control device 66, and the winding control device 98 in order to synchronize the respective parts of the loom 10.

An operation panel 104 is connected to the main controller 52. The operation panel 104 includes an operation command switch for starting the loom 10, a stop command switch for stopping the loom 10, a forward rotation command switch for temporarily rotating the loom 10 at a low speed forward, and a temporary loom 10 A reverse rotation designating switch or the like for reverse rotation at low speed is provided.

Instead of installing the motors 38, 54, 92, the sending beam
The 14, heddle 18, and the take-up roll 32 may be connected to the main shaft 84 via a clutch and driven by the main shaft 84. In this case, the delivery control device 44 and the opening control device 58
The winding control device 98 drives the corresponding clutch to drive the control shaft, the driving beam 14, the heddle 18, and the take-up roll 32.

FIG. 3 shows an embodiment of the main controller 52 for moving the cloth fell 24 by controlling the winding controller 98 at the time of restart.

The main controller 52 counts the output signal of the encoder 102 for the spindle 84, a spindle counter 110, a timing setter 112 that sets a plurality of types of timing, and a blank shot that sets the number of blank shots by the reed. The frequency setting device 114 is included.

The count value of the counter 110 corresponds to the rotation angle of the main shaft 84 because the output signal of the encoder 102 is a pulse signal having a frequency proportional to the rotation speed of the main shaft 84, and is cleared every time the main shaft 84 reaches 0 degree. To be done. The count value of the counter 110 is
Timing signal generator 116 as a rotation angle signal of main shaft 84
Supplied to

The timing setter 112 includes a feed-out control device 44 and an opening control device such as a timing for regulating the rotational angle position of the spindle when the loom is stopped and a timing for regulating the rotational angular position of the spindle when the reverse rotation is stopped. A plurality of timings at which the 58, the weft insertion control device 66, the winding control device 98 and the drive circuit 90 are operated are set to be changeable. Each timing is set as a rotation angle of the main shaft 84 and is also supplied to the timing signal generator 116.

The number of idle shots setting device 114 is set to be able to change the number of times the reed 22 is made to idle after restarting. Setting device 114
The number of blank hits set in is the counter 118 for the number of blank hits.
Supplied to

The timing signal generator 116 determines that the count value of the counter 110 for the spindle, that is, the rotation angle of the spindle 84 is the timing setter 11.
A timing signal is output to the sequence circuit 120 each time it matches the value set to 2, and each time the rotation angle of the main shaft 84 reaches 0 °, a 0 ° signal indicating that is output to the counter 118 for idle driving. Output.

The counter 118 for blank driving is a timing signal generator 116.
The 0-degree signal supplied from the counter is counted, and when the count value matches the value set in the blanking frequency setting unit 114, a match signal is output to the sequence control circuit 120. The counter 118 is cleared by the sequence control circuit 120.

An operation command switch 122 and an operation stop switch 124 provided on the operation panel 104 are connected to the sequence control circuit 120. The sequence control circuit 120 outputs the sending control device 44 and the aperture control device based on the timing signal from the timing signal generator 116 and the coincidence signal from the counter 118.
58, weft insertion control device 66, winding control device 98 and drive circuit 90 are controlled in synchronization.

FIG. 4 shows an embodiment of the winding control device 98 controlled by the main control device 52 shown in FIG.

The winding control device 98 includes a setting device 126 in which a rotation amount for reversely rotating the winding motor 92 at the time of restart is set. The value set in the setter is supplied to the pair of counters 128 and 130.

Each of the counters 128 and 130 counts the pulse signal generated by the encoder 100 of the winding motor 92, and is provided corresponding to each of the counters 128 and 130 when the count value matches the value set in the setting device 126. The flip-flops 132 and 134 thus reset are reset.

The flip-flop 132 is set by the forward rotation command signal supplied from the sequence control circuit 120 of the main controller 52 to the terminal 136. When flip-flop 132 is set, its Q output activates driver 138 to activate relay 140. As a result, the normally open contact 142 of the relay 140 is closed. The normally open contact 142 is used for the winding motor 92.
Speed potentiometer for setting the rotation speed when rotating the
Connected to 4.

On the other hand, the flip-flop 134 has the main controller 52.
It is set by the reverse rotation command signal supplied from the sequence control circuit 120 to the terminal 146. Flip-flops13
When 4 is set, its Q output activates the driver 148 to activate the relay 150. This allows relay 1
The 50 normally open contacts 152 are closed. The normally-open contact 152 is connected to a speed setter 154 that sets the rotation speed when the winding motor 92 is rotated in the reverse direction.

The speed setters 144 and 154 are variable resistors arranged to generate a DC voltage in the illustrated example. Setting device 144
Is applied in positive form to the summing point or summing circuit 156 via normally open contact 142, and the voltage of the setter 154 is applied in negative form to summing circuit 156 via normally open contact 152. .

The winding control device 98 also includes a winding operation circuit 158 and a converter 160. The winding operation circuit 158 is based on a pulse signal output from the encoders 100 and 102 during normal operation, as disclosed in, for example, JP-A-62-62959.
This is a known circuit that outputs a signal for rotating the winding motor 96 at a predetermined speed while synchronizing with the main shaft 84. The converter 160 is a known F / V converter that converts the frequency of the pulse signal output from the encoder 100 into a voltage.

The signal or voltage output from the winding operation circuit 158 is applied to the addition circuit 156 in a positive form, and the signal or voltage output from the converter 160 is applied to the addition circuit 156 in a negative form. The adder circuit 156 adds the respective input signals and then supplies them to the drive circuit 96.

The setting device 126 of the winding control device 98 sets the value for forward rotation and the value for reverse rotation separately, supplies the value for forward rotation to the counter 128, and the value for reverse rotation. May be supplied to the counter 130.

 The operation of the loom 10 will be described with reference to FIGS. 5 to 7.

During normal operation, the main control device 52 controls the feed-out control device 44, the opening control device 58, the weft insertion control device 66, the winding control device 98, and the drive circuit 90.

As a result, the warp 12 is sent out from the beam 14 at a predetermined speed, the heddle 18 is operated at a predetermined speed, and the weft 20
Is wefted at a predetermined timing, the reed 22 is operated at a predetermined timing, the take-up roll 32 is rotated at a predetermined speed, and the woven cloth 26 is wound around the cloth winding beam 36 at a predetermined speed.

Flip-flop 13 of the winding control device 98 during normal operation
2,134 have been reset. Therefore, the winding control device 98 outputs the addition signal of the output signal of the winding operation circuit 158 and the output signal of the converter 160 to the drive circuit 96.

When a cause such as a yarn breakage of the loom 10 that should be stopped occurs, the count value of the counter 110 of the main controller 52 is changed to the timing setter 1.
When it coincides with the stop timing set to 12, the stop timing signal is generated.
Feeding control device 44, opening control device 58, weft insertion control device 6
6. Give a stop command to the winding control device 98 and the drive circuit 90.

When the loom 10 is stopped, the cloth fell 24 is at a position on the hitting line 162 by the reeds 22, that is, a beating position, as shown in FIG. 7 (A).

After that, when the operation command switch 122 is pressed down, the main controller 52 outputs a forward rotation command signal to the terminal 136 of the winding controller 98. As a result, the flip-flop 132 of the winding control device 98 is set, so that a signal corresponding to the speed set in the speed setter 144 is supplied to the drive circuit 62, and the winding motor 92 is supplied to the speed setter 144. It is rotated at the set speed. As a result, the cloth fell 24 is advanced. The winding operation circuit 158 is not activated while the cloth fell 24 is advanced.

The count value of the counter 128 of the winding control device 98 is set by the setter 126.
If it matches the value set in, the flip-flop 132 is reset and the motor 92 is stopped. As a result, the seventh
As shown in the figure (B), the cloth fell 24 is retracted to a predetermined position.

When the cloth fell 24 is retracted to the predetermined position, the main controller 52
Outputs to the drive circuit 90 a signal for rotating the spindle motor 86 in the reverse direction at a low speed. As a result, the main shaft 84 is rotated in the reverse direction.
At this time, the heald motor 54 may also be reversely rotated.

When the spindle 84 is reversely rotated by the number of times set in the number-of-free-strokes setting device 114, the counter 118 of the main controller 52, which has been cleared at the same time as the start of the reverse rotation, outputs the coincidence signal, so that the main controller 52 is driven. After outputting the reverse rotation stop command signal to the circuit 90, a signal for rotating the heald motor 54 and the spindle motor 86 forward at a normal operating speed is supplied to the opening control device 58 and the drive circuit.
Output to 90 and.

As a result, the heddle 18 and the reed 22 are activated, and the reed 22 moves to the seventh position.
As shown in FIG. 3C, a blanking motion is performed. During the idling motion, the feed-out control device 44, the weft insertion control device 66 and the winding control device 66 are not activated. For this reason, since the cloth fell 24 is retracted to the front side of the cloth-wrapped beam 36, it is not struck by the reed 22.

During the blank beating motion of the reed 22, the main controller 52 determines whether or not the beating force has reached a predetermined value based on the output pulse of the encoder 102 for the main shaft 84. In the illustrated example, this determination is performed by counting the 0 degree signal after the start of the blank striking motion by the counter 118 and determining whether or not the count value has reached the value set in the blank striking frequency setting unit 114.

However, based on the output pulse of the encoder 102 for the spindle 84, the actual rotation speed of the spindle 84 is detected, and whether or not this rotation speed reaches a predetermined value or the idle time of the reed 22 is predetermined. It may be determined whether or not the beating force has reached a predetermined value, depending on whether or not the time has been reached.

When the main shaft 84 is positively rotated a predetermined number of times, the counter 118 of the main control device 52, which has been cleared at the same time as the start of the idling motion, outputs a coincidence signal.
The reverse rotation command signal is output to the terminal 146 of 98.

As a result, the reverse rotation flip-flop 134 is set, so that a signal corresponding to the speed set in the speed setter 154 is supplied to the drive circuit 96, and the winding motor 92 is set in the speed setter 154. It is rotated at the opposite speed. As a result, the cloth fell 24 is retracted. While the cloth fell is retracted,
The winding operation circuit 158 is not activated.

The count value of the counter 130 of the winding control device 98 is set by the setter 126.
If it matches the value set in, the flip-flop 134 is reset and the motor 92 is stopped. As a result, the seventh
As shown in the figure (D), the cloth fell 24 is returned to the beating position.

When the cloth fell 24 is returned to the beating position, the main controller 52
Outputs a signal for starting the normal operation of the loom 10 to the sending-out control device 44, the shedding control device 58, the weft insertion control device 66, the winding control device 98, and the drive circuit 90. As a result, the seventh
As shown in FIG. (E), the weft-inserted weft yarn is beaten by the reeds 22 onto the cloth fell 24.

As described above, by retracting the cloth fell 24 to a predetermined position and then rotating the main shaft 84 in the reverse direction and simultaneously rotating the heddle 18 in the reverse direction, the phases of the openings can be matched. However, when carrying out the present invention, the main shaft 84 need not be rotated in the reverse direction. In this case, the opening control device 58 may be driven at the same time as the start of the beating motion of the reed 22, and the repulsive force may be moved to the normal motion in a cycle in which the beating force reaches a predetermined value and the phases of the openings match.

The forward and backward movement of the cloth fell 24 can be performed by operating the feed-out control device 44. Alternatively, the winding control device 98 and the delivery control device 44 may be operated together. Further, for example, Japanese Patent Laid-Open No. 56-47
It is also possible to use a known kickback device as known from Japanese Patent No. 47, Japanese Patent Laid-Open No. 61-83355, etc., and to advance and retract the cloth fell 24 by the kickback device.

The cloth fell 24 may be advanced before the loom 10 is restarted, such as when the loom 10 is stopped. In this case, the main controller 52 causes the weaving cloth 24 to move forward due to a cause such as yarn breakage that should stop the loom 10, and causes the idle-motion motion of the reed 22 due to the operation command switch being pressed down. Let it start.

The retracted position of the cloth fell 24 may be any position as long as the cloth fell 24 is not struck by the reed 22 during the blanking motion of the reed 22. Therefore, the cloth fell 24 can be retracted by advancing the cloth cloth 24 by a preset distance. However, it is also possible to provide a sensor that detects the beating position of the cloth fell 24 and to retract the cloth fell 24 to a position where the sensor does not detect the cloth fell 24.

The retraction of the cloth fell 24 may be started after the beating force reaches a predetermined value, or may be started at the time point when the idle beating motion by the reed 22 is started. In the latter case, the main controller 52
Causes the weave 24 to gradually move toward the beating position during the blanking motion so that the cloth fell 24 reaches the beating position when the beating force reaches a predetermined value.

Further, the sending-out control device 44 and the winding control device 98 are
At the same time as the start of the blank beating motion of the reed 22, the normal operating state may be set. In this case, when the cloth fell 24 is retracted, in addition to the amount of movement of the cloth fell 24 previously retracted, the amount of movement during the blank striking motion may be retracted.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a loom used for carrying out the present invention, FIG. 2 is a view showing an embodiment of a weft length measuring storage device and weft insertion device, and FIG. 3 is a main control device. FIG. 4 is a block diagram showing an embodiment, FIG. 4 is a block diagram showing an embodiment of the winding control device, FIG. 5 is a flow chart illustrating the operation of the main control device, and FIG. 6 is an operation of the loom. FIG. 7 is a diagram showing a time chart to be explained, and FIG. 7 is a diagram for explaining the positional relationship of the cloth fell. 10: Loom, 12: Warp, 14: Sending beam, 18: Heald, 20: Weft, 22: Reed, 24: Weaving cloth, 26: Woven cloth, 32: Take-up roll, 44: Sending control device, 52 : Main control device, 58: Opening control device, 66: Weft insertion control device, 84: Spindle, 86: Spindle motor, 90: Spindle drive circuit, 98: Winding control device, 162: Reed position.

Claims (8)

(57) [Claims] 1. A driving method for starting a loom in a stopped state, wherein the beating force is retracted from a beating position to a position in front thereof and the weft inserting device is stopped. Of the loom is performed until it reaches a predetermined value, the cloth fell is returned to the reed position, and then the normal operation of the loom is started. 2. The method of operating a loom according to claim 1, wherein the weaving cloth is retracted before the weaving machine is started. 3. The method of operating a loom according to claim 1, wherein the cloth fell is evaded at the start of the blanking motion. 4. The method according to claim 1, wherein the cloth fell is stopped at the reed position during the blanking motion, and the cloth fell is moved to the regular position at the start of normal operation. How to operate a loom. 5. The woven fabric is gradually moved toward the repulsion position during the blanking motion so that the woven fabric reaches the reed position when the repulsion force reaches a predetermined value. The method for operating the loom according to claim 1, wherein the loom is moved. 6. A main shaft of a loom is reversely rotated by a predetermined number prior to the blanking motion, the main shaft is normally rotated to perform the blanking motion, and an opening device of the loom is operated in synchronization with the main shaft. The method for operating a loom according to claim (1). 7. The method of operating a loom according to claim 1, wherein the weaving cloth is moved by at least one of a woven cloth winding device and a warp feeding device. 8. During the blanking motion, the number of blanking or the number of rotations of the main shaft of the loom is counted, and it is judged whether or not the beating force has reached a predetermined value based on the counted value. The method of operating a loom according to claim 1.