JP2715089B2 - Loom operating method and apparatus - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an operation method and an operation control device effective for preventing a weaving step of a loom.

2. Description of the Related Art Conventionally, a pre-weaving position of a woven fabric is controlled to move in synchronization with rotation of a loom. However, it is very difficult to move the loom in synchronization with the rotation of the loom during a transitional operation when the loom is started or stopped, and the position of the loom is shifted. Also, during low-speed inching operation while the loom is stopped, delicate fluctuations such as changes in the physical properties of the warp yarns, friction due to heald mail, and changes in temple friction affect the weaving by the desired amount before weaving. It is also very difficult, and the weaving position also shifts at this time. When the loom is restarted in a state where the weaving position is shifted in this way, a weaving step occurs.

In order to solve the conventional drawbacks, the inventions of JP-A-58-186640 and JP-A-59-30944 disclose moving the weaving position to a proper position when the loom is started. However, as described above, it is very difficult to move the weaving cloth to the intended position, and it is not an effective solution.

From this, it is considered more effective to prevent the position before weaving from being moved rather than being synchronized with the rotation of the loom during the transitional operation and the inching operation when starting and stopping the loom. .

OBJECTS OF THE INVENTION Accordingly, an object of the present invention is to solve the conventional disadvantages by preventing the loom from being moved at all during the stoppage of the loom, the transitional rotation of the loom, or the inching operation.

Means for Solving the Problems Under the above-mentioned object, the present invention provides a method for stopping a feeding operation and a winding operation at a predetermined angle of a main shaft during a transitional rotation of the main shaft of the loom until the loom stops, and stopping the loom during a period during which the loom is stopped. During the start-up of the loom, the feed-out movement and the winding-up movement remain stopped regardless of the rotation of the main shaft during the first weft insertion after the start-up, and the feed-out movement and The winding movement is started. Therefore, during such a period from the stop of the loom to the restart, the feeding motion and the winding motion always stop or start only at a predetermined angle of the main shaft of the loom, during which the rotation of the loom is performed before the loom. Will not move at all without synchronization.

In the present invention, a device effective for such control is realized by a logic circuit or by using a control function such as a computer.

FIG. 1 shows a main part of a loom 1. Warp yarn 2
Is sent out from the sending beam 3 via the tension roll 4 and forms an opening 6 with the vertical movement of the heald 5, intersects with the weft 7 in the opening 6, is beaten by the reed 8 to the weave 9, and It becomes cloth 10. This woven cloth 10
It is wound by a plurality of guide rolls 11 and a take-up roll 12, and finally wound around a take-up beam 13.

The delivery beam 3 is driven by a delivery motor 15 of an electric delivery device 14 via a gear train 16. The delivery motor 15 is controlled by a delivery control device 17. That is, the feed-out control device 17 is assembled as a tension control system for the warp yarn 2, detects the tension of the warp yarn 2 at the position of the tension roll 4 by the tension detector 18, and according to the deviation from the target tension, The drive circuit 19 is controlled to control the rotation amount of the delivery motor 15. The rotation speed of the delivery motor 15 is detected by the tachogenerator 20 and the addition point of the input side of the motor drive circuit 19 is determined.
Negative feedback to 21.

On the other hand, the winding roll 12 is driven by a winding motor 23 of an electric winding device 22 via a gear train 24. The winding motor 23 is provided with a winding control device 26.
Is controlled by This winding control device 26 is a loom 1
The rotation of the main shaft 27 is detected by a rotation detector 28, and the main shaft 27 is
The take-up motor 23 is rotated by the motor drive circuit 29 in accordance with the rotation amount of 27, and the rotation amount is detected by the pulse generator 30, whereby the winding motor 23 is rotated by the required rotation amount.

Needless to say, the main shaft 27 is directly linked to the repulsion movement of the reed 8 and is driven by the driving motor 31 via the belt 32.

The feed control device 17 and the winding control device 26 are under the control of the operation control device 33 which is a characteristic of the present invention. The operation control device 33 is configured by a logic circuit or a computer based on the method of the present invention, as will be described later with each embodiment. When the loom 1 is stopped or started, the main shaft 27 rotates during one rotation. so,
A control signal is generated to the feeding control device 17 and the winding control device 26 only at a certain reference rotation angle. The operation control device 33 is installed as a part of the main control device 34 on the loom main body side or separately as illustrated in FIG.
Connected to it.

Operation of the invention During operation of the loom 1, the operation detector 28 detects the rotation angle of the main shaft 27, generates a rotation pulse signal at every certain rotation angle, and generates a pulse signal at a predetermined angle, for example, at a rotation angle of 0 ° C. Are generated.

When the loom 1 is in operation, an operation signal of “H” level is given to the operation control device 33 from the main control device 34,
The operation control device 33 generates an “H” level control signal corresponding to the operation command, and thereby operates the sending-out control device 17 and the winding control device 26. Therefore,
The delivery control device 17 sequentially rotates the delivery motor 15 to set the tension of the warp yarn 2 to a target tension. Further, the winding control device 26 sequentially rotates the winding motor 23 following the progress of weaving, that is, in proportion to the rotation of the main shaft 27.

During such a weaving operation, if a stop command is issued to the loom 1 due to, for example, poor weft insertion, the main weaving device 34 is set to the second
As shown in the figure, in response to the stop command, the operation signal is changed to “L” level, and the driving motor 31 is stopped at a predetermined angle while decelerating. On the other hand, when the rotation detector 28 generates the reference timing signal after the level change of the operation signal, the operation control device 33 generates an "L" level control signal. Immediately issues a stop command to the device 26. Therefore, the feeding device 14 and the winding device 22 always stop only at a predetermined angle, that is, the angle 0 ° of the main shaft 27.

Thereafter, the loom 1 is placed under the control of the main controller 34, reversely rotates in preparation for the extraction of the defective weft thread 7, and waits in the closed state as shown in (1) in FIG. Then, the weaver further reverses the main shaft 27 of the loom 1 to bring the defective weft thread 7 into a completely open state, and (2) in FIG.
Then, the defective weft thread 7 is pulled out as described above, and then, as shown in FIG. 3 (3), it is reversed again to the substantially closed start position to prepare for the next restart. During this stop period, the feeding device 14 and the winding device 22 do not operate,
The warp yarn 2 and the woven fabric 10 hardly move.

When the main control device 34 generates an operation signal of "H" level for restarting, the driving motor 31 starts up according to its startup characteristics. Since refilling is not performed as needed during a few picks, for example, two picks intended for starting, the reed 8 continues to be idle and compensates for the shortage of the pushing force due to insufficient rotation at the intended starting. .

After that, weft insertion starts, and then the rotation detector 26
Generates a predetermined angle, that is, a reference timing signal, the operation control device 33 supplies the operation signals to the feeding control device 17 and the winding control device 26 to restart the feeding motion and the winding motion. As a result, after the new weft thread 7 is driven in, the feed control device 17 and the winding control device 26 resume the operation.

In this way, the unwinding movement and the winding movement are
When the loom 1 is stopped, it stops only at a predetermined angle, and also stops during a reverse rotation or an inching operation during the stop period, and restarts only at the same predetermined angle at the time of subsequent restart. Therefore, when stopping and starting the feeding and winding motions, there is no deviation by one rotation angle,
Also, the movement of the weave 9 is impossible.

The wefting, unwinding and winding movements are started in the same phase and simultaneously.

Embodiment 1 FIGS. 4 and 5 show an example in which the operation control device 33 is constituted by a logic circuit and an operation state thereof.

When the operation signal becomes "H" level and an operation command is issued to the loom 1, the one-shot pulse generation circuit 35 sets the counter 36 to the reset state. This counter 36
Setting device 37 for weft protection or setting device 38 for other than weft protection
And the changeover switch 39 and the changeover device 40. This preset value sets the number of idle picks when the loom 1 is started. The two setting devices 37, 38 determine at the beginning of the unwinding and winding movements, i.e. whether to start the unwinding and winding up with a pick-in or to start them after a certain pick. You.

When the operation signal changes to “L” level during operation, the AND gate 43 receives the “H” level signal from the knot circuit 44. Therefore, when the “H” level reference timing signal is received, the flip-flop 45 is activated. After resetting, the control signal is changed to “L” level in order to stop the feeding or winding motion.

After that, the operation signal becomes “H” level, and the loom 1 is restarted. During this time, a predetermined number of "H" level timing signals are given to the down input of the counter 36 via the AND gates 41 and 42, and when the count value overflows, the "L" level prohibition signal is output from one of the outputs. Is output, and the input from the AND gate 42 is inhibited. At the same time, the one-shot pulse generation circuit 46 generates an “H” level output at the other output, and sets the flip-flop 45 to the set state. An "H" level control signal is output to start the movement and the winding movement.

Second Embodiment Next, FIGS. 6 and 7 show an example in which the operation control device 33 is constituted by a dedicated computer, or the above-described control is executed by using the function of a computer on the main control device 34 side. .

As shown in FIG. 6, when the operation signal changes to "H" level and when it changes to "L" level, an interrupt signal is issued to the computer. Otherwise, the operation status = 0, that is, a stop state command is issued. If the operation is an operation, the operation state is set by the operation status = 1, and then the internal counter is reset by C = 0. The state is set, and the count valid flag is set.

Thereafter, as shown in FIG. 7, when the reference timing signal rises, a routine for the feeding motion and the winding motion is started by interruption, and the operation status = 1? Is determined first. That is, when the operation for stopping is commanded, the feeding motion and the winding motion immediately enter the stop state.
However, when the operation status = 1, the valid flag set? Is determined, otherwise the routine ends, but if set, the counter C = C
The built-in counter value is updated by +1. Then, it is determined whether or not the counter value is equal to the set value. When the counter value becomes equal, the valid flag is reset, and the feeding motion and the winding motion are started, and Will be shifted to the operation state.

In each of the above embodiments, the sending and winding motions are performed by a dedicated motor separate from the driving motor of the loom,
The present invention is not limited to this, and can also be applied to an apparatus of a type in which a drive source is transmitted from a driving source of a loom via a clutch and a winding mechanism is operated. In this case, the engagement / disengagement of the clutch is controlled by a control signal from the operation control device described above.

According to the present invention, when the loom is stopped, the unwinding motion and the winding motion are stopped only at a predetermined angle, and during the halt period of the loom, the unwinding motion and the winding motion are set to the stopped state, and thereafter, Even at the time of restart, after the first horizontal insertion, the unwinding motion and the winding motion start operating only at the same predetermined angle as at the time of stopping, so there is no deviation between the unwinding motion and the winding motion before and after the stop, and Since there is no movement before weaving, there is no need for a conventional weaving alignment device, and the occurrence of weaving steps can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a loom, FIGS. 2 and 3 are time charts of operation, FIG. 4 is a block diagram of an operation control device in a first embodiment, and FIG. FIGS. 6 and 7 are flowcharts of the second embodiment. 1 ... loom, 2 ... warp yarn, 3 ... delivery beam, 9
...... before weaving, 10 ... woven cloth, 12 ... winding roll, 14 ...
Feeding device, 17: Feeding control device, 22: Winding device, 26: Winding control device, 27: Spindle, 28: Rotation detector, 33: Operation control device, 34: Main control device , 36…
…counter.

Claims (2)

(57) [Claims] In a transitional rotation of a main shaft of a loom until the loom stops, a feeding operation and a winding operation are stopped at a predetermined angle of the main shaft, and the feeding operation is performed regardless of the rotation of the main shaft during a stop period of the loom. The locomotion and the winding motion are kept in a stopped state, and when the loom is started thereafter, after the first weft insertion, the feeding motion and the winding motion are started when the predetermined angle is reached. The operating method of the loom. 2. A feeding device for feeding a warp yarn under a predetermined tension, a winding device for winding a woven fabric following the progress of weaving, and a rotation angle of a main shaft of a weaving machine for detecting a rotation angle of a main shaft of a weaving machine. A rotation detector that generates a reference timing signal at an angle, and when the operation signal and the reference timing signal of the loom are simultaneously input, the feeding device and the winding device are stopped, and after the first weft insertion after the loom is started, An operation device for a loom, comprising: an operation control device that starts operation of the feeding device and the winding device when the timing signal is input.