JPH03113052A - Inching control of weaving machine - Google Patents

Abstract

PURPOSE:To prevent weaving bar during inching by giving an inching direction when the angle of the main rotation is within a range of forbidden inching angle set previously, continuing the normal drive of a driving motor during the rotation period corresponding to the above-mentioned range of the angle even after going out of the direction and avoiding shortage of beating-up force. CONSTITUTION:Before the beating-up angle of the main shaft, a prescribed range of forbidden inching angle and a range of reversing operating angle between the above-mentioned range of the angle and the beating-up angle are previously set. A state where the angle of the main rotation is within the above-mentioned range of forbidden inching angle is detected by a detector and the inching switch is turned ON when the signal is sent out. Even after changing the switch to OFF, the normal drive of the drive motor is then continued over a period of the rotation within the above-mentioned range of the forbidden inching angle. When the main shaft is within the above-mentioned range of the reversing operation angle, an inching direction is given and, even after going out thereof, the normal rotating drive of the driving motor is continued during a continuous period corresponding to the range of the forbidden inching angle also as mentioned above after reversely driving the drive motor once. Thereby shortage of beating-up force can be prevented during that period.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control method for preventing the occurrence of weaving rows during inching operation of m machines.

[Conventional technology]

The invention of Utility Model Publication No. 61-13573 discloses that during inching operation of a rapier loom, the power supply to the driving motor for driving the m machine is continued before and after the weft grip is released by the rapier. According to this technique, thread receiving is a passing period;
Since inching operation is prohibited and the drive motor rotates continuously, mistakes in thread transfer can be reliably prevented.

[Issues with conventional technology]

However, troubles during inching operation are not limited to the above-mentioned yarn receiving errors, but also include problems with the quality of the woven fabric, such as the occurrence of weaving steps due to insufficient beating force. In other words, even near the beating angle, if driving operation, that is, intermittent rotation, is performed as the drive switch is operated, the beating movement will be executed without the driving motor for driving the loom being sufficiently accelerated.
The reed beating force is insufficient, and this causes weaving steps.

[Object of the Invention] Therefore, an object of the present invention is to prevent the occurrence of weaving steps due to insufficient beating force during driving operation.

[Means for solving the invention]

Therefore, the present invention sets a predetermined angle range before the beating angle of the loom, and allows the drive motor of the 1lli loom to continue rotating in the forward direction regardless of whether the drive command is on or off within this angle range. Alternatively, measures are taken to make the reed beating force the same as during steady operation by once reversing the drive motor and then continuing to rotate in the forward direction.

[Configuration of the Invention] FIG. 1 shows a necessary control system as a block in order to realize the drive control method of the present invention.

A rotation angle detection unit 2 for detecting the rotation angle θ of the main shaft 1 of the loom and a spring return push button drive switch 3 for commanding drive operation are both connected to the input end of the control unit 4. The control section 4 drives the driving motor 6 of the loom via the motor drive section 5 to rotate the main shaft 1. Here, the control section 4 is configured by a logic circuit or the like based on the drive control method of the present invention, and is also assembled by a computer to realize necessary functions as a program.

[Action of the invention]

While the loom is stopped, that is, while the drive motor 6 is stopped, the rotation angle detection unit 2 detects the rotation angle θ of the main shaft l, and detects the rotation angle θ of the main shaft l.
1), based on the first invention, for example, θ=3306 to 360° (O
o) The signal a is generated over the angular range A of prohibition of driving, or as shown in FIG. A signal a is generated at θ-340'' to 360° (0'), and a signal S is generated in the angle range B for starting reverse rotation, and these signals are sent to the control section 4.The operator presses the drive switch 3. When operated and turned on, the drive command signal S is transmitted during the operation.
is given to the control section 4.

When the main shaft 1 is outside the predetermined angle range A, the control unit 4
operates the motor drive section 5 to intermittently drive the rotation of the drive motor 6 in accordance with the on/off state of the drive switch 3, that is, the level change of the signal S. However, when the main shaft l enters within the angular range A due to drive operation or within the angular range B due to manual rotation, the drive command signal S
is given, the control unit 4 receives the driving prohibition signal a, so the drive motor 6 is prevented from rotating in the forward direction for a predetermined continuous rotation period C, regardless of whether the drive switch 3 is on or off. The rotation is continued, or after receiving a signal, the drive motor 6 is once reversed, and then continuously rotated in the forward rotation direction over a continuous rotation period C. Note that this continuous rotation period C is set by a predetermined set angle, a predetermined angular interval, or a predetermined time. As a result, the rotation of the drive motor 6 is sufficiently accelerated before the beating, and the beating movement is executed after the beating force is approximately equal to that during steady operation. Therefore, even in the process of this drive operation, the occurrence of weaving rows, especially one row, can be prevented.

Note that the rotational speed or rotational torque, or the rotational speed and rotational torque of the drive motor 6 are set to a higher value than in a steady state by the motor drive unit 5, as necessary, in preparation for strengthening the shinging force.

[Embodiment]

Examples 1 to 5 correspond to the first invention of claim (1), and Example 6 corresponds to the second invention of claim (2). .

Furthermore, Example 7 is related to the first and second inventions and corresponds to the embodiment section of claim (3).

[Embodiment 1] Embodiment 1 is an example constructed using logic circuit elements, as shown in FIG.

The angular range A in which driving is prohibited is set at the high contour portion of the main shaft IC and the attached dog 7. The proximity switch 8 inside the rotation angle detection section 2 generates an "L" level signal when the proximity switch 8 corresponds to the lower part of the dog 7. In this state, when the drive switch 3 is operated and the "H" level signal S is given to the OR gate 12 of the control section 4 as a drive command by the positive voltage (2), the driver 13 controls the motor drive section 5 for forward rotation. Since the relay 9 is driven and the relay contact 92 is set to the on state, the motor drive section 5 intermittently drives the drive motor 6 using the commercial power supply 10 according to the on/off state of the drive command. .

However, when the proximity switch 8 corresponds to the high contour part of the dog 7, detects the angular range A where driving is prohibited, and generates the signal a, the drive switch 3 is pressed and the relay 9 is energized. Then, the holding contact 91 is turned on, so unless the cancel switch 11 is turned off, the drive switch 3 is turned off and the signal S is turned off.
Even if the signal a goes to the “L” level and disappears, the signal a at the @H” level continues to be sent from the proximity switch 8 to the OR gate 1.
2, the relay 9 is continuously energized. For this reason, the motor drive unit 5 has an angular range A
is a predetermined continuous rotation period C, and the drive motor 6 is continuously rotated.

Therefore, when the main shaft 1 enters the angular range A due to inertia or the like during driving operation, and once a jig command is given by the drive switch 3, the control unit 4 controls the angle range for the continuous rotation period regardless of whether the drive switch 3 is off or not. The drive motor 6 is continuously rotated over angle C, that is, over the angular range A set by the dog 7, and the beating movement is completed during this period, thereby preventing insufficient beating force.

[Example 2] In this example 2, as shown in FIG. 4, the continuous rotation period C
This is an example in which the angle is set by the angular interval between the two dogs 7.14.

When the same proximity switch 8 as described above does not correspond to the high contour part of the dog 7, the "H" level signal S from the drive switch 3 is directly passed through the OR gate 12 to the driver 13.
The relay 9 is driven through the drive motor 6, so that the drive motor 6 can be rotated intermittently.

However, when the proximity switch 8 corresponds to the high contour part of the dog 7, the "H" level signal a is present, and the drive switch 3 is set to the on state, the AND gate 15 is set to the "H" level. The signal a is passed through, the R-S type flip-flop 16 is set, and the output terminal Q is continuously supplied with “
It generates an H" level output and drives the relay 9 via the OR gate 12 and driver 13. Therefore,
When the signal a of the proximity switch 8 and the drive command signal S are both set to the "H" level, the flip-flop 16 memorizes the state and switches the relay 9 to the subsequent drive switch 3.
It continues to drive regardless of whether it is turned off. Eventually, when the high profile part of the other dog 14 faces the proximity switch 17 near θ-360°, the "H" of the proximity switch 17
Since the flip-flop 16 is set to the reset state by the level signal C, the relay 9 is set to the OFF state at this point, and the continuous rotation of the drive motor 6 immediately stops. Therefore, this continuous rotation period C can be arbitrarily set, for example, beyond the beating angle by adjusting the rotational phase of the two dogs 7.17 on the main shaft 1.

[Embodiment 3] In this embodiment 3, as shown in FIG. 5, the continuous rotation period C
This is an example of setting by time.

Outside the angular range A in which driving is prohibited, the signal S of the drive switch 3 is in a state where it can directly drive the relay 9 intermittently, as in the previous embodiment. Here, when the "H" level signal S is input from the drive switch 3 to the AND gate 15 while the proximity switch 8 is facing the high outline part of the dog 7, from that point on, the one-shot circuit etc. The timer 18 generates an output with a predetermined time width, and this time width sets a continuous rotation period C, during which the relay 9 is turned on regardless of whether the drive switch 3 is off or not. lI! It will be driven in a yt manner.

[Example 4] In this example 4, as shown in FIG.
This is an example in which the continuous rotation period C is set according to the amount of rotation of the main shaft 1.

The angle range A is set by detecting the rotation angle θ of the main shaft I by the encoder 20 and comparing the rotation angle θ with the setting angle set by the setting device 19 by the comparator 21.

Outside the angle range A, the signal S from the drive switch 3 directly enters the OR gate 12 and drives the relay 9, as in the third embodiment. On the other hand, when the comparator 21 detects the angular range A, and in this state the 'H' level signal S is input from the drive switch 3, the AND gate 15 drives the one-shot circuit 22, and the counter 23 is set to the preset state.When the counter 22 is set to the preset state, the counter 23 is outputting an "H" level output, so that the relay 9 is in the excited state.However, Eventually, the signal P of the least significant bit for counting from the encoder 20 is input to the counter 24, and when it reaches the value of the count value setter 24 for setting the angular interval, the output of the counter 24 goes to the "L" level. At that point, the relay 9 is immediately set to the OFF state.The continuous rotation period C in this embodiment follows the count value of the counter 23, that is, the amount of rotation of the main shaft 1.

[Example 5] This example is shown in FIG. 7 and is similar to Example 2 (
Based on FIG. 4), this is an example in which the drive motor 6 is reversed near the beating angle and then started in the normal rotation direction.

When the drive switch 3 is operated outside the angle ranges A and B,
Depending on the on/off state, the forward rotation relay 9 operates.

Further, within the angular range A, the flip-flop 16 performs the same operation as described above in response to the signal a, and the continuous rotation period C
The relay 9 is rotated continuously over .

However, when the rotation angle θ of the spindle 1 is within the angle range B for starting reverse rotation due to manual rotation, etc., the “H” level signal and the “H” level signal S from the drive switch 3 are output to the AND gate 25. Since the signal is input, the flip-flop 26 is set to the cent state. Therefore, the output of the flip-flop 26 drives the reversing relay 28 via the driver 27 and closes the contact 281.
The drive motor 6 is temporarily rotated in the reverse direction.

When the drive motor 6 rotates in the reverse direction and the main shaft 1 reaches a reverse rotation stop angle (330°), a reverse rotation stop signal C1 sets the flip-flop 27 to a reset state. Therefore, at this point, the drive motor 6 immediately stops reversing. The output of the flip-flop 26 changes from H” level to @L
``When falling to the level, the one-shot circuit 29
A signal d indicating the end of reverse rotation at H" level is generated and sent to the cent input terminal of the flip-flop 16 through the OR gate 30. Therefore, since the flip-flop 16 is also set at this point, the relay 9 for forward rotation is set. teeth,
It rotates continuously until the flip-flop 16 is reset by the signal C to stop normal rotation, and stops at the normal rotation stop angle, for example, θ=10'. These signals a −, b %
c, -, cl are obtained by a dog/proximity switch, an encoder, etc., as in the previous embodiment.

In this embodiment as well, a timer or counter is used instead of the flip-flops 16 and 26, and the continuous rotation period C is regulated by a set angle, or by time or by a predetermined angular interval. You can also do that.

[Embodiment 6] All of the above embodiments are examples in which the rotational speed and rotational torque of the driving motor 6 during the continuous rotation period C are set in the same manner as during the steady state. The rotational speed, rotational torque, etc. may be set to higher values than during steady rotation, considering that the rotation is transient.

FIG. 8 shows an example in which the motor drive unit 5 is configured as an inverter for this purpose.

That is, the number of rotations, that is, the rotational speed of the drive motor 6 is set by the frequency setter 51. This frequency setter 51 is set to a value higher than the commercial frequency that determines the rotation speed during steady state, and the voltage pattern generator 52 and the PWM
It is sent to section 53. The voltage pattern generating section 52 has R
It is composed of OM etc., and multiple patterns P1
, P2, P3, etc. are stored in advance at predetermined addresses, and predetermined patterns are generated. In addition, the switch 5
4 specifies the address of the ROM in order to select a desired pattern from among the plurality of patterns P1, P2, and P3. Therefore, the voltage pattern generating section 52 outputs the desired pattern stored at the designated address. By changing this pattern, the rotational torque of the drive motor 6 is changed to an appropriate value.

Then, the PWM section 53 pulse-width modulates the commercial power supply 10 converted into DC in the driver 55 based on the signal of the frequency f and the voltage signal ■, and sends it to the drive motor 6 to drive the drive motor 6 at that frequency. The rotation speed of the motor 6 is changed. Of course, the driver 55 drives the drive motor 6 with a pulse width modulated alternating current voltage according to its frequency f. Such patterns P1, P2, and P3 are set so that the voltage V is proportional to the frequency f, as shown in FIG. Although not shown, other sequence circuits for starting and stopping the drive motor 6 are interposed in the commercial power supply line.

〔Effect of the invention〕

According to the first invention, when wefting and reeding by drive operation, the drive motor is always operated continuously within a predetermined angle range where driving is prohibited, and when wefting after wefting in each drive operation, Since the conditions are set to be the same as during normal operation, the reed beating force can be sufficiently increased. Thereby, the texture of the fabric due to weft insertion during driving can be set to be approximately the same as the texture during normal operation.

Further, in the second invention, in addition to the above-mentioned effect, when the main shaft of the loom is within the angle range of reverse start by hand rotation,
When the drive switch is pressed, the required reed striking force is obtained through sufficient acceleration due to forward rotation after reverse rotation.

In addition, in embodiments where the rotational speed, rotational torque, or rotational speed and rotational torque are changed in the direction of increasing during the continuous rotation period, a change may occur in the weaving conditions between the continuous rotation period and the continuous operation during normal operation. However, it is possible to prevent the formation of a thin film or one layer depending on the type of fabric.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the basic configuration of the present invention, Fig. 2 is an explanatory diagram of rotation angle, Figs. 3 to 8 are block diagrams of each embodiment, and Fig. 9 is a frequency-voltage diagram. This is a graph of ■... Main shaft, 2... Rotation angle detection unit, 3... Drive switch, 4... Control unit, 5... Motor drive unit, 6... Driving motor. Patent applicant Tsudakoma Kogyo Co., Ltd. Agent
Person: Patent attorney Kuni Nakagawa's younger brother, Figure t7-62, died of two evil acts, Figure 3.

Claims (3)

[Claims] (1) A predetermined angular range in which inching is prohibited is set before the beating angle, and when a inching command exists within this angular range, the predetermined continuous rotation is performed regardless of whether the inching command disappears after this point. A method for controlling the inching of a loom, characterized in that the drive motor continues to rotate in the forward direction over a period of time. (2) Set a predetermined angular range in which inching is prohibited before the beating angle, set an angular range for reverse start between this angular range in which inching is prohibited and the gnashing angle, and set the angle in which inching is prohibited. When a jig command exists within the range, the drive motor continues to rotate in the forward direction for a predetermined continuous rotation period regardless of the disappearance of the jig command, and within the angle range of reverse start, the jig command is 1. A method for controlling the inching of a loom, which comprises: first rotating the drive motor in reverse for a predetermined period of time when the motor is present, and then continuing to rotate the drive motor in the forward rotation direction for a predetermined continuous rotation period. (3) The method according to claim 1 or 2, characterized in that at least one of the rotational speed and rotational torque of the drive motor is changed from the value during normal operation during the predetermined continuous rotation period. How to control the inching of a loom.