KR800000008B1 - Automatic control device of the loom - Google Patents

Abstract

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Description

Automatic control of loom

FIG. 1 is a diagram showing the outline of the photoelectric detector sphere of a defective aperture chamber applied to the present invention as a background of the present invention.

2 is a diagram showing the detection range of the photodetector of FIG.

FIG. 2a is a diagram to more generally represent FIG. 2 and to clarify the object of the invention.

3 is a mechanical block diagram showing one embodiment of the present invention.

4 is an electrical circuit diagram of a preferred embodiment of the present invention according to FIG.

5 is a waveform diagram of each part for explaining the operation of FIG.

6 is a waveform diagram of each part for explaining the operation of FIG.

The present invention relates to an automatic control device for a loom, and in particular, to detect the opening of the loom of thread loom caused by the weaving of the loom, and the slant caused by breaking of the thread. The present invention relates to an improvement of a control device.

During the weaving operation of the loom, the inclination becomes entangled or broken by thread lint or thread shaving, so that an opening defect occurs.

Various apparatuses for automatically detecting such opening defects have been proposed.

Among the prior arts, the type of photodetection of opening defects is particularly preferable in view of the rapid operation time. The details of the photodetection mechanism of the opening defect are disclosed in, for example, the "stopping machine for looms" of Japanese Patent Application No. 44-4843.

FIG. 1 is a diagram showing the outline of the photoelectric detector mechanism of the defective aperture yarn used as the background of the present invention and used in the present invention. The inclinations 1 and 2 are respectively opened up and down by the heds 3 and 4 respectively, and are sequentially sent to the left according to weaving. 1 is a dotted line showing the inclinations 1 'and 2', in which any of the inclinations 1 and 2 are entangled with each other with a threaded plasticizer in the opening, resulting in an opening failure. The body 5 is reciprocated by the rotation of the crankshaft 6. In the upper part of the Sleigh Sward (8), a sleigh (7) is provided in the front, and in the rear, the light source (9) the photoelectric element (10) so that the optical axis penetrates the opening of the inclined part on both sides of the loom. Are installed oppositely.

The cam 11 is fixedly installed on the crankshaft 6 so that the above-described photoelectric detector sphere causes the inclined opening failure when the body 5 moves at an appropriate time between one rotation of the loom, for example, inclined opening ( Only the period for detecting the shadow of 1 ') and 2' is selected so that the contact point of the timing switch SW is opened.

The opening / closing operation of the switch SW is used as a gate signal for sending the detection signal of the photoelectric detector back, but the details thereof will be described later. In addition, the photoelectric detector tool of FIG. 1 may be many other forms as a mechanism for photoelectric detection of an opening defect inclination as an example to the last.

2 is a diagram showing the detection range of the photoelectric detector sphere of FIG. This mechanism is configured to detect the presence or absence of an irregular opening in a range of, for example, 80 ° to 130 ° of the crankshaft 6. In other words, the timing switch SW is opened by the cam 11 in the range of 80 ° to 130 ° of rotation of the crankshaft 6.

Also, for example, in the case of a bad fabric of an opening, the inclination 1 (uppermost opening line) is not straight in the transverse direction and loosens several times as in the inclination 1 "indicated by the two-dot line in FIG. This loosening inclination 1 " blocks the light beam from the light source 9 within the detection range of 80 ° to 130 ° so that the true detection signal (negative opening detection) is performed even though the photoelectric element 10 is a normal opening. Therefore, in the case of a bad fabric of such an opening, a loom can be stopped automatically, for example, as a false opening, even if it is a normal opening, thereby causing a malfunction.

Therefore, it is conceivable to change the individuality range of the timing switch SW to 90 ° to 140 °, for example, by 10 ° depending on the detection range. This reduces the chances of malfunction due to loose inclination (1 ″) in the case of a bad fabric of the opening, but changes the mounting angle or shape of the cam 11 to adjust the individual period of the timing switch SW. The change is very difficult. In other words, in order to change the gate timing mechanically, it is necessary to arrange the machine, change the mounting angle or shape, and operate it again to determine its suitability. And if it is inadequate, the loom must be stopped again and changed, and the work is complicated.

In addition, if the part of the loom is covered with a cover or the like, the cover must be removed at that time. If this part is deep, it is difficult to reach and the work is difficult.

In addition, when the detection range is fixed to 90 ° to 140 ° from the beginning, it is difficult to detect an irregular opening such as a woven fabric in the case of a normal fabric.

A more detailed description will be made with reference to FIG. 2A.

The density per sheet of the heddle 3 and 4 which raises and lowers an inclination is used in 7-14 pieces with respect to 1 cm, for example.

For example, as in the case of the 113-width polyester and cotton 113-ply cloth, the number of inclinations is about 4, the inlet is 4 sheets. The number of carp is 1,500 pieces per piece. And the inclination density at this time will be about 53 articles per cm.

In the case of using such four inlets, as shown in FIG. 2A, the alignment surfaces of the inclinations 1 and 2 are not straight and have a certain width. Due to the weaving yarn, there are many yarn linings, and the yarns of each of the adjacent bosses and the lower yarns are entangled with each other, so that when the weaving operation starts, the opening becomes more incomplete. Becomes like '). At this time, since the shatle is circumferentially through the incomplete opening, the non-slip is made by stepping on the upper thread 1 'or by throwing the lower thread 2'. In order to detect such a defect opening, what has conventionally been performed operates the detection apparatus only in the angular range indicated by (B) in FIG. 2A.

In FIG. 2A, (X _A ) indicates the case where the body 5 is at the frontmost side, and (Xc) indicates the case where the body 5 is at the most child side. And (X _B ) indicates the angle at which the optical axes of the detectors 9 and 10 pass through the fully open supervisor group. From this angle X _B , the detection operation of the irregular opening starts, for example, when the start end of the right root of the timing switch SW shown in FIG. 2 is hit, this is the theoretical best adjustment. However, when the continuous operation is started, the operating speed is high, so the opening is delayed, and the position where the entanglement by the lint is released falls within the angle range indicated by B. In the end, the nonwoven can be rubbed. Such a lint entanglement results in a poor opening and the imperative angle (X _B1 ) at which nonwoven occurs in reality.

When the angle of occurrence of defective opening due to the strongest fluff or yarn is set to (Xc), the apparatus may be operated in the timing period between (X _B1 ) and (XC) shown in FIG. 2A.

However, this nonwoven occurrence angle is very unstable. For example, the optical axis of the detectors 9 and 10 has already moved to (Xc) when the shaft thrown from one side deviates from the middle part of the straight width. This is because the tangling that causes the strong nonwoven that occurred on the other side is released and eventually the nonwoven does not occur. Therefore, in such a case, if it is fixed at (X _B1 ) as the start of the detection range, the loom is stopped and malfunctions (false stops) are many.

Therefore, the practical angle is near (X _B2 ). This angle (X _B2 ) is more unstable and susceptible to the loom's operating speed, quality of yarn, inclination density, and the like.

It is necessary to move this (X _B2 ) further to the (Xc) side when the quality of the warp is particularly bad or in the case of a long open leg. The elements and angles that need to be changed are as follows for the 45th polyester and cotton blended yarns. That is, one is the speed of the loom, and if it is changed from 180 RPM to 220 RPM, for example, it is necessary to make the crankshaft angle about 5 ° (Xc). In addition, if the type of yarn is changed, for example, a yarn having a long fluff needs to be changed about 5 to 10 degrees. In this way, the operation of changing the angle (X _B1 ) to (X _B2 ) requires the use of a mechanical timing switch to release the screw holding the right root and move it to the scale amount. .

Therefore, in order to facilitate such a change, for example, it is known to determine the gate timing by processing with a mode electrode without using a mechanical timing switch such as the right root as shown in JP 48-40595 A. In this way, for example, when the optical axis crosses the superior axis, the first timer t ₁ is operated to move to (X _B2 ) in FIG. 2a, that is, only the time t ₁ is turned off. Therefore, the second timer t ₂ is operated from (X _B2 ) to (Xc) to turn on the device so that the time t ₁ and t ₂ can be varied. With this technique, the driver's license can be adjusted simply by picking up. However, the point of this method is that when the speed of the machine slows down (in the extreme example, the throw operation), the time t _l is always constant so that (X _B2 ) as the gate timing is relatively over (X _B1 ). X _B ) moves to the side and detects it as a false opening even though it is a normal opening, causing a false stop every time. The angle between the (X _A1 ) and the bender (X _B2 ) is about 15 to 20 degrees and the time is about 18 milliseconds when the operating speed is 180 RPM. Therefore, it is found that it is very difficult to accurately adjust while having subtle precision when considering the above-described fluctuation factors.

Therefore, the main object of the present invention is to simply set the irregular opening detection range, that is, the gate signal to a desired range according to the opening state of the fabric, and to detect the normal opening as the irregular opening even when the throw operation is performed as described above. It is to provide an automatic control device for the loom which does not cause a malfunction.

The present invention is connected to the crankshaft of the loom as a gate signal to gate the opening state detection signal, and generates a fixed timing signal that defines the start of a predetermined crankshaft angle range of the weaving operation. The delay circuit responding to the signal is provided so as to use the gate signal having the crankshaft angle corresponding to the output of the delay circuit adjusted by the variable means at the start.

3 is a basic functional block diagram of the present invention. The light beams from the light source 9 in FIGS. 1 and 2 are input to the photoelectric device 10, and the photoelectric device 10 receives the light beams and operates to detect a change in the amount of light due to blocking of the inclination. A real detection signal is derived. This detection signal is input to the amplifier A, amplified and input to the gate circuit.

As described later, the gate circuit gates a real detection signal and applies it to a real detection indicator (LED), for example, a light emitting diode, and at the same time, for example, a waveform shaping circuit (OSM ₁ ) consisting of _one short multivibrator. To give. On the other hand, a timing pulse from the dimming switch SW (derived at the personalization time of the switch) is given as a shielding signal of the gate over two delay circuits, which is a feature of the present invention. These two delay circuits are, for example, one short multi-vibrator, etc. One is for varying the time at which the output pulses of these delay circuits respond to the electrical timing pulses, for example, by the variable resistor VR ₃ . One of them is for varying the falling time of the output pulses of these delay circuits, for example, by the variable resistor VR ₄ in response to the timing pulses. As described above, the two delay circuits determine the opening / closing period of the gate circuit which is controlled to be opened and closed by the timing pulse from the timing switch SW. That is, one delay circuit is triggered by the rising signal of the timing pulse and outputs an output pulse having a pulse width determined by the variable resistor VR ₃ so that a subsequent delay circuit drops the output pulse from the one delay circuit. Triggered by the signal to freely determine the falling of the output pulse by the variable resistor (VR ₄ ). Therefore, these two delay circuits do not input the real detection signal of the gate, which is opened and closed due to the cooperative and fixed dimming pulse, to the subsequent circuit without the real detection signal due to the disturbance of the slope (maximum opening line). The rotation angle of the crankshaft can be set freely.

The real detection signal from the photoelectric element 10 is applied to a waveform shaping circuit, for example, from one short multivibrator or the like, across the gate, which is characterized by the delay circuit output. The pulse output from this waveform shaping is given to the accumulation circuit. When the pulse input by the predetermined number of real detection circuits is accumulated, the measurement circuit applies an input to a waveform shaping circuit such as, for example, one short multivibrator or the like to derive, for example, a pulse output for control. For example, the control circuit CC including a relay or the like stops, for example, in accordance with an electric control pulse signal.

4 is an electrical circuit diagram of a preferred embodiment of the present invention according to FIG.

The configuration thereof will be described below with reference to FIG.

In the configuration, the detection signal of the photoelectric element 10 is applied to the amplifier A, and its output is a capacitor C ₁ for differential and diode D ₂ for extracting only the forward components of the differential output. D ₃ ) is applied to the input circuit of one short multivibrator OSM ₁ as a waveform shaping circuit.

The connection point of the capacitor C ₁ and the diode D ₂ is connected between the diode D ₁ and the ground GND in a reverse direction with respect to the pole ground GND with the polarity shown in the figure. In addition, the switch transistor Tr ₃ as a gate circuit is connected.

On the other hand, the timing switch SW which is opened and closed in conjunction with the cam 11 in FIG. 1 is inserted between the base electrode of the transistor Tr ₄ and the ground GND, so that the output of the transistor Tr ₄ is It is input to one short multivibrator OSM ₃ as one delay circuit. This multivibrator (OSM ₃ ) output is furthermore given to one short multivibrator (OSM ₄ ) as one delay circuit. The multivibrator OSM ₃ is composed of transistors Tr ₈ and Tr ₉ and has a variable resistor VR ₃ for adjusting the output pulse width thereof. The multivibrator OSM ₄ has a transistor ( Tr ₁₀ ), (Tr ₁₁ ) and has a variable resistor VR ₄ for adjusting the output pulse width thereof. That is, the multivibrator OSM ₃ is triggered by the rise of the output pulse (timing pulse) of the transistor Tr ₄ and rises, and the output pulse falling after the time obtained by adjusting the variable resistor VR ₃ elapses. To derive. The multivibrator OSM ₄ is triggered by the fall of the output pulse of the multivibrator OSM ₃ and rises to derive an output pulse that falls after a time obtained by adjusting the variable resistor VR ₄ . The output of the multivibrator OSM ₄ is provided as the base input of the transistor Tr ₃ .

The above-mentioned one-shot multivibrator OSM ₁ is composed of transistors Tr ₁ and Tr ₂ and has a variable resistor VR _{1 at its} output. Such a one-shot multivibrator is well known in the art and thus detailed description of the circuit is omitted. The time constant or output duration of this multivibrator (OSM ₁ ) is shorter than the one operation cycle when the loom's operation speed is the fastest. Therefore, the multivibrator (OSM ₁ ) is used for each cycle at the maximum operation speed. Even if is operated, the continuous output is output at a space without being amplified. The output of the multivibrator OSM ₁ is applied to the base of the transistor Tr ₇ across the diodes D ₄ and D ₅ because of the extraction of the positive component of the differential capacitor C ₄ and the differential output. A transistor (Tr ₇₎ of the base capacitor (C ₄₎ is a capacitor of the integration for as an accumulation circuit for the purpose of accumulating the differential output (C ₅₎ is connected so only the differential output pulse a predetermined number of the capacitor (C ₅₎ When accumulated, for the first time transistor Tr ₇ is turned on and outputs to its emitter. The output of the transistor Tr ₇ is given to one short multivibrator OSM ₂ as a waveform shaping circuit, so that the duration required for driving the control circuit CC including a rear relay or the like, for example, pulse width 3 Converted to a pulse of seconds. The multivibrator OSM ₂ output drives the subsequent control circuit CC. The control circuit CC includes an output amplifier circuit and a relay for the purpose of stopping the loom. The relays are used to stop the operation of the loom but their subsequent devices are well known in the art and are therefore not an essential part of the present invention and thus the illustration is omitted.

The switch transistor Tr ₆ for discharging the charging charge of the capacitor C ₅ is connected to the base of the transistor Tr ₇ . When there is an input electrode of the base, the output of the multi-vibrator letter (OSM ₂₎ is given over a resistor (R ₁₅₎ output to the multi-vibrator letter (OSM ₂₎ of the transistor (Tr ₆₎ is necessarily transistor (Tr ₆₎ On, the capacitor C ₅ is discharged. In the transistor (Tr ₆₎ the base has a positive component extraction of the multi-vibrator letter (OSM ₃₎ a from the collector of the transistor (Tr ₉₎ constituting a condenser for a differential (C ₆₎ and a resistor (R ₁₂₎ and the differential output of the The differential output signal is given across the diode D ₆ . However, since the transistor Tr ₆ is connected, the output of one short multivibrator OSM ₁ is provided to the base, which is the input electrode of the transistor Tr ₅ , across the resistor R ₁₃ . Therefore, when there is an output of the multivibrator OSM ₁ , the transistor Tr ₅ is turned on and the base of the transistor Tr ₆ is forced to the potential of the ground GND, so the differential output signal of the capacitor C ₆ is at this time. Enters, it ends with what is called resonance. This differential output signal comes in when there is no output in one short multivibrator OSM ₁ and turns on transistor Tr _{6 for the} first time.

5 is a waveform diagram of each part for explaining the operation of FIG. Furthermore, this FIG. 5 assumes that there is a continuous opening failure for three or more operating periods of the weaving 35. The operation will be described below with reference to FIGS.

In FIG. 1, when the rotation angle of the crankshaft 6 reaches 80 ° corresponding to (X _B1 ) indicated in FIG. 2A, the timing switch SW is opened by the action of the cam 11, and the rotation angle is adjusted. When it reaches 130 degrees corresponding to (Xc) shown in FIG. 2A, the timing switch SW will return to the closed state by the action of the cam 11 again. During the individuality period of the timing switch SW, the transistor Tr ₅ is turned on to obtain a timing pulse as shown in FIG. Therefore, the output of this transistor Tr ₄ is differentiated by a subsequent differential capacitor, and the diode gives only the negative component of the differential output as a trigger input of the multivibrator OSM ₃ . For this reason, this multivibrator OSM ₃ derives an output pulse as shown in FIG. 5C determined by the variable resistor VR ₃ . Therefore, the output of the multivibrator OSM ₃ is differentiated by a subsequent differential capacitor, so that only a negative component (responsive to the fall of the output pulse of the multivibration letter OSM ₃ ) is multiplied by the diode. It is assigned to the trigger input of vibrator (OSM ₄ ). Therefore, this multivibrator OSM ₃ derives an output pulse as shown in FIG. 5 d determined by the variable resistor VR ₄ . The output pulse of the multivibrator OSM ₄ is provided as the base input of the transistor Tr ₃ as the gate circuit, and the output transistor turns on the low-period transistor Tr ₃ . Therefore, the selector potential of the transistor Tr ₃ depends only on the output signal from the amplifier A. That is, the gate of the transistor Tr ₃ is opened by the output pulse of the multivibrator OSM ₄ . In other words, the gate transistor Tr ₃ has the individual timing of the timing switch SW (X _{B1 in} FIG. 2a: rotation angle of the crankshaft 80 °) from the pulse width of the multivibrator OSM ₃ (the rotation angle of the crankshaft 10). °) the delay only i.e. 2a degrees (X _B2) open timing switch (SW) unique ends (the 2a-degree (Xc in): the pulse width of the delay than the crank chukhoe em 130 °) multi-vibrator letter (OSM ₄₎ Is closed by.

On the other hand, at this time, the output of the photoelectric element 10 and thus the amplifier A outputs a real detection signal due to the disturbance of the inclination 1 even in the case of a normal opening, but the gate transistor Tr ₃ starts the individual timing of the timing switch SW. In addition, since the crankshaft is turned off (opened) by 10 ° as the rotation angle of the crankshaft, the detection signal in the case of the normal opening is not given as an input by the following one short multivibrator OSM ₁ . Therefore, the capacitor C ₅ is not charged with any voltage.

However, even if the fifth chamber is derived detection signal due to the opening in the negative output of the amplifier (A), such as e is more negative role detection signal it is not incoming to the period of the off state of the gate transistor (Tr _3). Therefore, the indicator LED indicates that there is a negative opening, and this negative opening detection signal is given as a trigger signal of the multivibrator OSM ₁ as waveform shaping across the diodes D ₂ and D ₃ . For this reason, the multivibrator OSM ₁ derives a rising pulse output in response to the input fraudulent opening detection signal as shown in FIG.

Furthermore, the timing signal output of the multivibrator OSM ₄ is differentiated by the capacitor C ₆ so that a differential output is obtained at both ends of the resistor R ₁₂ . This positive component is applied to the base of the transistor Tr ₆ across the diode. However, the transistor Tr ₅ is turned on during the output period due to the output of the one short multivibrator OSM ₁ . Therefore, the transistor Tr ₆ is not turned on because the positive polarity component of the differential output is forced to ground GND across the transistor Tr ₅ . Therefore, the transistor Tr ₆ remains off and the capacitor C ₅ is not discharged.

Therefore, the differential output by the capacitor C ₄ of the output of the multivibrator OSM ₁ becomes the charging current of the waveform as shown in FIG. 5G to charge the capacitor C ₅ . The change in the charging voltage of the capacitor C ₅ is shown in FIG. 5h. The transistor Tr ₇ is turned on at the set voltage level of FIG. In this embodiment, three incoming pulses are charged (accumulated) and are set above the level as a ratio. Therefore, when the charging voltage reaches the above level, the transistor Tr ₇ is turned on, and a short circuit (OSM ₂ ), for example, generates a pulse having a pulse width of 3 seconds to generate a control circuit cc including a relay. Drive to perform the desired stop for example. At the same time, the multivibrator OSM ₂ output is applied to the transistor Tr ₆ across the resistor R ₁₅ to turn on the transistor Tr ₆ to discharge the capacitor C ₅ to return to the initial state. With the number of incoming pulses, the charging voltage of the capacitor C ₅ reaches the stop operating level by adjusting the variable resistor VR ₁ to change the output voltage of the output.

Next, with reference to FIG. 6, the operation state when the opening defect detection signal has not occurred three consecutive wandering cycles will be described. 6 shows an example in which the real detection signal is continuously input as shown in FIG. 5, but shows that the third real detection signal does not come in. Since the real detection signal is lost in the third time, there is no corresponding multivibrator OSM ₁ output and the transistor Tr ₅ remains off for the period. Therefore, the positive polarity of the undifferentiated force of the capacitor C ₆ shown in FIG. 6 and the component are applied to the base of the transistor Tr ₆ as shown in FIG. 6 h, and the transistor Tr ₆ is turned on. do. Transistor to discharge all (Tr ₆₎ over the transistor (Tr ₆₎ is the electric charge charged on the capacitor (C ₅₎ with a continuous incoming signal twice by without stopping up to operation level. In this manner, the initial state is returned.

As described above, according to this preferred embodiment, since the negative opening detection signal is accumulated by the condenser, only the predetermined number of times the negative opening detection signal is continuously controlled regardless of the operation speed of the loom, and is automatically controlled. The setting of the continuous incoming signal of the desired number of times is simply set by the variable resistor.

In addition, in the above-described embodiment, control is made when three or more consecutive irregular opening detection signals are input, but it is of course set freely according to the type of fabric to be woven (quality required).

As described above, according to the present invention, since the timing signal preceding the desired gate signal is mechanically or fixedly generated and the timing signal is delayed by an electrical delay circuit, the desired gate signal is obtained. An optimal gate signal is obtained. In other words, for adjusting the delay time of the electrical delay circuit, for example, only a variable resistor or the like may be operated. Therefore, there is no need to change the structure, the shape, or the mounting angle of the cam or the right wing which interlocks with the crank side, so that it is not necessary to stop the loom at each time in adjusting the gate phase, and the gate phase can be arbitrarily adjusted even during operation of the loom.

In addition, since it can be adjusted electrically by simply using a variable resistor, it is not necessary to enter and adjust the inside of the loom, for example, by extending the lead wire and installing this knob at the optimum position such as the control panel's operating surface. good.

In addition, in the case of the throw straight, in which the opening condition is improved, the detection range automatically detects the irregular opening toward the abnormal range.

If this be described in more detail with reference to 2a also because appointed the leading end of the mechanical fastening timing fixedly on PREFERRED (X _B1) since its gate signal to (X _B2) in the variable delay from the leading end of woogeun The circuit is provided so that its gate gate is turned off so that the gate is opened so that the device operates (X _B2 ). Therefore, even if shifted to the above-described throw operation, the detection range, that is, the beginning of the gate signal, starts from the maximum (X _B1 ) and does not go beyond (X _B1 ) again to (X _B ) as in the above-described prior art, and therefore is normal False stops such as detection of openings as irregular openings can be avoided.

Moreover, of course, it changes arbitrarily about the specific numerical value, such as the angle of the above-mentioned Example, to the loom, the kind of fabric, etc.

Claims (1)

In the automatic control device of the loom in which the inclined sheet is opened for each weaving operation, it is attached to the body of the electric loom and is connected to the opening state detecting means for detecting the opening state of the inclined sheet and the crank shaft of the weaving machine. A mechanical timing signal which is connected to an opening state detection means for detecting an opening state and a fixed timing signal defining a start of a predetermined crank side strength range of the weaving operation for detecting the opening state by being connected to a crank shaft of the loom. A delay circuit which operates in response to the generating means and a fixed timing signal defining the start stage; means for varying the delay time in the delay circuit; and outputs of the delay circuit adjusted by the variable means; Gate signal generating means for generating a gate signal having an axial angle at the start; Sites by a signal responsive to the gate means and the Dude agent a detection output to the gate of the detection output from said opening state detecting means for automatic control device of the weaving machine comprises means for controlling the weaving machine.

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