JPS5916018B2 - Cut warp detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for detecting and displaying cut warp yarns in a loom.

Depending on the width of the fabric, weaving machines have gone from having several thousand warp threads to more recently as many as 10,000 warp threads.

If even one of these many warp threads breaks, the loom must be stopped in order to splice the warp threads, and the operator must search for the cut warp thread among the thousands of warp threads. To do this, it is first necessary to detect warp thread breakage, and recently there have been devices that detect warp thread breakage without contact, such as devices that use light, ultrasonic waves, microwaves (radar), etc. Although such methods have been proposed, they have not been put into practical use except in a few cases due to problems such as the inability to avoid erroneous operation due to cotton getting entangled in the sensor and the high cost.

Therefore, a method has been used in the past to lock a dorotsupa pin to each warp thread and detect the fall of the dorotsupa pin due to cutting of the warp threads. Even in this method, optical, mechanical, and electric methods have been put into practical use. There is.

However, although these devices can detect warp breaks, especially in large looms with a large number of warp threads, searching for the cut warp threads requires great effort, attention, and a long time. Furthermore, there was an inconvenience in that productivity decreased.

Conventionally, when searching for such cut warp yarns, a worker moves a lever placed on the right or left end of the back of the loom that engages with the fallen drotsupa pin, and searches for the fallen drotsupa pin among thousands of warp threads. I was searching for it.

What is the process of automatically detecting the breakage of the warp threads due to a falling Droppa pin, automatically stopping the loom, and searching for the one fallen Droppa pin among the thousands of Droppa pins lined up over a length of approximately 4 meters? The problem was that the work was difficult and took a long time, resulting in poor textile productivity.

Therefore, in order to cut the cut warp threads, a reed switch, a dropper switch such as a phototube, etc. corresponding to each warp thread is used, and the fall of the dropper pin due to the cutting of the warp threads is detected by the conduction of the switch, and signal processing using matrix logic is performed. A device has been proposed that processes signals using a circuit and displays cut warp threads. However, such a device requires as many dropper switches as there are warp threads, and it is also necessary to construct a matrix logic corresponding to the number of warp threads, making the device extremely complex, inevitably prone to malfunctions, and making the device extremely difficult to operate. The drawback was that it was expensive.

There are other devices that use photoelectric elements for each number of warp threads, but these have the problems of causing mistakes in operation due to fluff and dust, and making the device expensive.

Furthermore, in order to solve the above-mentioned problem, the dropper bar and the filler bar are electrically insulated divided into a plurality of regions in the width direction of the warp group, and an indicator lamp is connected to each region.
A device has been proposed in which a dropper pin on which the warp threads are cut and falls acts as a switch, and an indicator lamp connected to the region to which the cut warp threads belong is lit to display the region to which the cut warp threads belong. However, in a loom that uses several thousand to 10,000 drop pins, such a device generally has multiple drop pins arranged side by side, and each pin is divided into an appropriate number of areas, so each area and display are different. In order to connect to the lamp, it is necessary to place a large number of signal output lines inside the loom with careful attention to electrical insulation, which is time-consuming and increases the number and length of signal output lines. There is a problem that the total amount used becomes enormous, and the structure of the dropper bar becomes complicated, resulting in an increase in cost.

Moreover, the loom rotates and reciprocates repeatedly during operation, and vibrations and shocks are constantly propagated to the signal take-out wires, dropper bars, etc., so there is a high possibility of wire breakage and shoots, leading to malfunctions. , which has the problem of being difficult to maintain. Therefore, the current situation is that these proposals have not been put to practical use in actual factories. The present invention was devised by the present inventors in the process of developing a device that solves the problems that conventional cut warp detection devices had.

An object of the present invention is to provide a highly practical device that has a simple configuration, detects and displays the position of cut warp yarns, is easy to install and maintain, is highly durable, and is less likely to malfunction.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive device that makes it easy, reliable, and quick to find the position of cut warp threads, minimizes the downtime of the loom, and improves the productivity of the loom. It is. The present invention comprises: a dropper pin made of a conductor that is supported by each warp thread and is arranged in a row in the width direction of a group of warp threads; a conductor locking body that is interlocked with the dropper pins arranged in the row; Both have a length that matches the width of the warp group, and when the warp pins are supported by the warp threads, they do not contact each other, but the warp threads are cut and fall due to the combined force of the dropper pins, and are supported by the conductor locking body. In this method, a plurality of conductive rods are arranged in parallel at positions where they touch each other, and a predetermined electrical input is applied to the conductive rods, which have an electrical impedance amount, and the conductive rods have electrical impedance that differs depending on the position in the width direction of the warp group of the cut warp threads. A sensor unit that outputs an electrical signal, and a sensor unit connected to the sensor unit to process the electrical signal from the sensor unit to detect the position in the width direction of the warp group of the cut warp threads and to display the same. A signal processing circuit section that outputs an electric signal according to the position in the width direction of the warp group of the cut warp threads, and a signal processing circuit section that outputs an electric signal according to the position of the warp group of the cut warp threads in the width direction based on the electric signal from the signal processing circuit section. This is a cut warp detection device comprising a display device. The present invention having the above configuration is very simple,
In addition, it is an inexpensive device, and a signal processing circuit detects the position of the cut warp threads in accordance with the position in the width direction of the warp group, which is output by the sensor unit, and displays the position on the display device, allowing the operator to cut the warp threads. This method has the advantage that it is easy to find the warp threads that have been used, and that the loom can be started quickly without splicing the warp threads.

Next, aspects included in the present invention will be described. The first aspect (Claim 2) is that the conductive rod disposed below the dropper pin can be treated as impedance quantities equivalent to a resistor, coil, capacitor, and equivalently these. When the dropper pin that was supported by cutting the warp falls due to its own weight, it is detected as an impedance proportional to the distance from the end of the position where it contacts the conductive rod, and the signal is processed to determine the position of the cut warp. It is to be displayed. The first aspect can be applied to existing looms because it is only necessary to replace the conventional conductive rod made of conductive wire with a resistance wire, coil wire, etc., and to add a signal processing circuit and a display device. It has an easy and simple configuration, and since cut warp threads can be easily found, the downtime of the loom can be minimized and productivity can be increased.

The second aspect (claim 3) is that the conductive rod of the sensor section is divided into a plurality of regions corresponding to the width of the warp group, and the position in the width direction of the warp group cut from the sensor section belongs. Different signals are output corresponding to the divided areas, and the output signals are processed to detect and display the area to which the cut warp belongs.

In the second aspect, a plurality of circuit elements of a signal processing circuit section corresponding to each divided area of a conductive rod are arranged in parallel, and a display means of a display device is connected to each of the circuit elements. In the first type (Claim 5), each divided area outputs a quantitatively or qualitatively different signal, and the area to which the cut warp belongs is determined based on the signal. and a second type (claim 6) that is lit by the display means of the display device corresponding to the area. This second aspect has similar advantages as described above.

A third aspect (Claim 4) is to perform signal processing on the electric impedance detected in the first aspect as being proportional to the position in the width direction of the warp group of the cut warp yarns. In this process, the position of the cut warp thread detected as the impedance amount is determined to which of the divided regions corresponding to the width of the warp thread group belongs, and the display means corresponding to the number of divided regions is selected. Only the display means corresponding to the area to which the selected warp belongs is lit. Similar to the above-mentioned embodiment, the third embodiment has the advantage that it is possible to easily find the cut warp threads using an inexpensive device and to minimize the downtime of the loom, thereby increasing productivity. have Hereinafter, the present invention will be explained based on examples.

The cut warp yarn detection device of the first embodiment belongs to the first aspect described above, and detects the position of the cut warp yarns as a divided resistance (partial pressure) by the dropper pin 12 of the conductive rod 13 made of a resistance wire of the sensor section 1. The signals are differentially amplified in a signal processing circuit section, converted into digital signals, and a display device I digitally displays the position of the cut warp threads. below,
This will be explained using FIGS. 1 to 3. The sensor section 1 includes a conductive locking body 11 that locks a dropper pin 12, and a conductive rod 13 made of the dropper pin 12 and a plurality of resistance wires.

As shown in Fig. 1, the warp wound around the ground beam GB is placed in a zigzag shape (as shown in Fig. 3) at an appropriate position downstream of the back roller BR in a direction perpendicular to the stop to facilitate the warp falling when the warp is cut. One by one, each pin is locked in the circular hole of the dropper pin 12 disposed in the hole.

Further, the dropper pin is made of a rectangular thin plate of stainless steel, and is electrically conductively locked in the long hole of the conductor locking band. When the lower end of the dropper pin 12 breaks the warp, the dropper pin 12 falls and is located below beyond the conductive rod 13, and the warp thread w is not cut and the warp thread w causes the dropper pin 1 to fall.
When the warp threads 2 and 2 are locked, the warp threads w are arranged in such a position that they do not come into contact with each other, and in a direction perpendicular to the warp threads w. Moreover, so that the dropper pin 12 easily falls over the conductive rod 13 when cutting the warp w, a predetermined number ( 6) are installed. Since the dropper pins 12 are arranged in a zigzag pattern as shown in FIG. 3 as described above, the width of the conductive rod needs to be sufficiently wider than the width of the dropper pins in the warp direction. One end of the conductive rod 13 is grounded. The signal processing circuit section includes differential amplifiers DA and A.
It consists of a D converter AD.

The differential amplifier DA has its positive input terminal connected to a DC power supply D.
Conductive rod 1 consisting of six resistance wires forming a closed circuit with C
Connect the end (left end in Figure 2) connected to the positive liquid of the DC power supply 3 (left end in Figure 2), and connect the negative input end to the dropper pin 1.
This is an operational amplifier that is connected to the left end in the figure of the conductive locking body 11 that locks 2 and is grounded.

When the distance from the left end of the conductive rod 13 to the position where the warp threads are cut and abuts on the conductive rod 13 is l, the differential amplifier DA amplifies the voltage -TOEO supplied to the positive input IE terminal. and outputs line (rule) 1.

The A-D converter AD has its input terminal connected to a differential amplifier DA.
Connected to the output terminal of the analog signal E differential amplifier D
The output signal (k-0)l of A is replaced with a digital 10-digit signal.

The display device 1 is a digital display device, and is connected to an A-D converter AD, and uses a digital signal outputted by the A-D converter AD to display information in the width direction of the warp group of cut warp threads, as shown in FIG. 2, for example. The position is digitally displayed as 1234.

The cut warp detection device of the first embodiment having the above-mentioned configuration is as follows:
When a certain warp is cut, the dropper pin 12 supported by the warp falls due to its own weight and comes into contact with the conductive rod 13 at a distance of 1 from the left end in the figure, then the sensor I detects the dividing resistor -RO or The voltage ±EO is applied to the positive input terminal of the differential amplifier DA of the signal processing circuit H, and the signal k(-)EO amplified by the differential amplifier DA is output as A-
The D converter AD converts it into a digital version, and the display device 1 displays, for example, 1234 digitally.

In other words, the display device allows the operator to know that the 1,234th warp thread from the left end has been cut, and the operator can use the display to know that the 1,234th warp thread from the left end has been cut, without spending a long time searching for the cut warp thread.
, 234th warp and then restarting the loom, it is possible to find the cut warp more quickly and improve productivity. Next, the cut warp yarn detection device of the second embodiment connects a rod member made of an insulator with a good electrical conductor at an appropriate interval from the lower end of the dropper pin 12 which is locked to the plurality of running warp yarns and the conductor locking band 11. Different voltages are applied to each of the covered annular members A, ~A4, which are arranged in a nodal manner with a slight interval between them, and the dropper pins 12 that fall due to the cutting of the warp threads strike the conductive rod. Detects and displays which region the cut warp belongs to by detecting the voltage at the contact point of the dropper pin 12 to determine which of the plurality of annular members A1 to A4 it has contacted. It is something to do. As shown in FIG. 4, the warp cut detection device of the second embodiment includes a sensor section 12 that constitutes a conductive rod having four annular members A1 to A4 to which different voltages are applied. , a signal processing circuit section 2 that processes the potential signal detected by the sensor section 12, and a display section 2 that displays the cut location of the warp threads cut based on the processed signal.

The sensor section 12 includes a dropper pin 12, a conductor locking band 11 for locking the dropper pin, a conductive rod made of an insulator, and four annular members A1 to A4 made of electrically conductive material held at slight intervals. It is constructed by covering in knots. Wedge-shaped guides G1 to G5 made of insulating material are arranged at the intervals between the annular members and at both ends, so that when the dropper pin 12 falls onto the side walls G, to G5 of the guides, it will surely fall onto either of the annular members. It guides you to come into contact with. The conductive rods have a total length equal to the total width of the warp group, and a plurality of the conductive rods are arranged in parallel at right angles to the warp group.

Further, the position of the conductive rod is such that the support by the warp is released due to the warp breakage, the dropper pin 12 falls, and is supported by the conductor locking band 13, and the dropper pin 12 is fully attached to the annular members A, ~A4 of the conductive rod. The contact arrangement is determined. The signal processing circuit section 2 includes a DC power supply DC and four resistors R1 to R1 having equal resistance values connected in series to the DC power supply DC.
A power supply unit BT consisting of R4, lead wires 11 to 14 connecting contacts corresponding to each potential divided and formed by the resistor to respective annular members of the sensor unit 1, and four comparison circuit elements CM.
It consists of a comparator circuit CM consisting of circuits 1 to CM4 and four reference voltage setting circuits E1 to E4.

The negative electrode side of the direct current power supply DC is grounded.

The DC power supply DC forms a closed circuit with resistors R1 to R4 having equal resistance values connected in series between the positive and negative electrodes. Further, the voltage V4 applied to the left end of the resistor R4 is applied to the fourth annular member A4 via the lead wire 14, and the resistor R
The left end voltage V3 of No. 3 is connected to the third annular member A through the lead wire.
3, and then connect and apply in the same manner. Comparison circuit CM is 4
It consists of circuit elements CM1 to CM4.

The first comparison circuit element CMl consists of a comparator,
The positive input end is connected to one end of the conductor locking band 11, the other end is connected to the first reference voltage setting circuit E1, and the output end is a diode D-1 whose anode is grounded via a resistor RMl.
Connect to the cathode of The second to fourth circuits have the same configuration, except that the reference voltages of the reference voltage setting circuits E1 to E4 connected to the negative input terminals of the comparators are different. The display device 2 consists of four photodiodes FDl to FD4 connected in series, each diode FDl
The anode of ~FD4 is connected to each of the comparison circuit elements CM, ~C
It is connected to the cathodes of diodes D-1 to D-4 connected to M4, and the cathode of the fourth photodiode FD4 is grounded.

In the cut warp detecting device of the second embodiment with the above-described configuration, when a certain warp is cut and the dropper pin 12 that was locked to the warp comes into contact with the second annular member A2, the voltage V2 is applied to the dropper pin. 12, applied to the positive input terminals of each of the comparison elements CM1 to CM4 of the signal processing circuit 2 via the conductor locking body 11.

Then, the first and second comparators CM, CM2 to which a reference voltage E2 set slightly lower than the voltage V2 and a reference voltage E1 lower than that are applied are turned on, and a potential difference is generated between the anode and the cathode. Only the second photodiode FD2 in the area lights up to notify the operator that the warp belonging to the second area has been cut. Next, the present invention will be described in a fifth embodiment based on the cut warp detection device of the third embodiment.
This will be explained using figures.

The warp cut detection device of the third embodiment belongs to the above-mentioned third aspect, and is perpendicular to the warp threads at an appropriate interval from the lower end of the dropper pin that is locked to the plurality of running warp threads and the conductor locking body. The voltage is determined based on the resistance division ratio at which position of the conductive rod, which is made up of a plurality of resistance wires arranged in parallel and whose length corresponds to the full width of the warp in the direction, is where the dropper pin falls into contact due to cutting of the warp. The voltage signal is used to display the cutting state at the part where the hard thread is cut.

The warp breakage detection device of the third embodiment includes a sensor section 1 that extracts the falling position of the dropper pin as a partial pressure based on dividing resistances, and a signal processing of the voltage signal outputted by the sensor section 1, similar to the first embodiment. a signal processing circuit section 3 for displaying the cut portion of the warp threads based on the processed signal; and a display device 1a for displaying the location of the cut warp threads based on the processed signal; , a stop signal for stopping the loom at a predetermined timing, and a stop device for resetting the signal processing circuit section 3 and outputting a set signal.

The sensor section 1 is the same as that in the first embodiment, so the same reference numerals are given and the explanation will be omitted.

The signal processing circuit section 3 is connected to a power supply section 21 that applies a predetermined voltage to the sensor section 1, an amplification section 22 that amplifies the voltage detected by the sensor section 1, and processes the amplified voltage signal. n circuit elements 231 that output signals to display means
23N, and a resetting circuit 24 for resetting the operation of the signal processing circuit 23.

The power supply section 21 is composed of a resistor R1 having one end connected to the positive electrode of a DC power supply, and a cathode-grounded silicon diode D having an anode connected to the other end of the resistor R1 and connected in series with the resistor R1. The anode of is connected to the other end 131 of the conductive rod 13 of the sensor section 1 which is not grounded. Therefore, a constant DC voltage of 0.6 is applied to both ends of the conductive rod 13, which is made of a resistance wire such as a nichrome wire, by utilizing the forward characteristics of the silicon diode D.

Usually, the length of the conductive rod is about 1 m to 4 m depending on the width of the fabric, but a constant DC voltage of 0.6 V is applied regardless of this length. The amplification section 22 includes three resistors R2, R3, and R4 connected in parallel, a diode D2, a transistor Q1, and a resistor R5.

The first resistor R2 has one end connected to the positive pole + of the DC power supply and the other end connected to the conductor locking band 13 of the sensor section 1.

The second resistor has one end connected to the positive pole + of the DC power supply,
The other end is connected to the base of transistor Q1. The third resistor R4 has one end connected to the positive pole + of the DC power supply, and the other end connected to the collector of the transistor Q. The fourth resistor R5 is connected between the emitter of the transistor Q1 and the grounded negative pole of the DC power supply. A diode D2 is connected to the base of the transistor Q1 and the other end of the first resistor R2. The amplifying section 22 having the above-mentioned configuration constitutes a DC amplifier, and if the second resistor R3 is set sufficiently larger than the fourth resistor R5, the amplification rate of the DC amplifier is independent of the amplification factor of the transistor. , is determined by the ratio (current) of the fourth resistor to the third resistor, and the input voltage R5/voltage is E.

Then the output is E. It becomes X{4. Also, since looms have severe mechanical vibrations or electrical noise, the voltage on the anode side of diode D2 is raised to the power supply voltage by resistor R2 and diode D2, and transistor Q1 is always kept at 0N.
The DC amplifier is operated only when the voltage shifts to 0.6 V or less to eliminate the effects of external noise and contact resistance. In addition, the resistance R2 is several 10K0 to several 1
It is necessary to set it to 00KΩ. Furthermore, the temperature characteristics of the diode D2 cancel out the temperature characteristics of the transistor Q1, thereby achieving stability against temperature changes. Signal processing circuit 2
3 consists of N circuit elements 231 to 23N.

The first circuit element 231 is a transistor Q of the amplifier section 22.
A first diode D whose anode is connected to the collector of
3, a second diode D4 whose anode is connected to the cathode of the first diode D3, and a thyristor SCRl whose gate is connected to the cathode of the second diode D4 and whose anode is connected to the positive pole of a DC power supply. ,
It consists of a resistor R3 and a capacitor C1 connected in parallel to remove noise between the cathode of the second diode and the cathode of the thyristor.

The second circuit element 232 has the connection relationship of the remaining elements with respect to the first circuit element 2, except that the anode of the first diode D5 is connected to the cathode of the first diode.
This is the same as No. 31, and the explanation will be omitted.

Subsequent circuit elements 233 to 23 (n-1) and the second
It consists of the same configuration as the circuit elements of. Note that the Nth circuit element 23N at the final stage is omitted because the first diode DN+2 serves as the second diode.

Further, the cathode of the first diode DN+1 is grounded via a resistor RNl. Therefore, the signal processing circuit 23 uses the first diodes D3, D5, . The voltage is applied to each circuit element 232 to 23N by decreasing the voltage by 6V.

The reset circuit 24 sets the device so as not to cause a malfunction when the warp threads are cut and the device operates to resume the operation by joining the warp threads. This is to temporarily cut off the supply of power supply voltage of 3.
It consists of a switch transistor Tr whose collector is connected to the positive pole of a DC power supply and whose emitter is connected to the power supply section 21 and the signal processing circuit section 23, and a resistor R24 connected in series to the base of the switch transistor Tr. It operates based on the reset signal from the device. The display device 8 includes N display means 31 to 3N and an oscillator 32.

The first display means 31 includes a photodiode LEDl whose anode is connected to the cathode of the thyristor of the first circuit element 231 of the signal processing circuit section 2, a resistor R7 connected between the anode of the photodiode LEDl and ground, and the resistor R7 connected between the anode of the photodiode LEDl and the ground. When a signal is output from the first circuit element, the photodiode LEDl emits light.

Similarly, the second to nth display means 32...3N also have their photodiodes LED2...LEDN.
and the respective circuit elements 232, . . . of the signal processing circuit section 2, respectively.
...23N thyristor SCR2...SC
It has the same circuit configuration as the first display means except that it is connected to the cathode of RN.

A display section having N display means is movably arranged by a magnet at a position easily visible to an operator of the loom. The oscillator 32 has a collector connected to a resistor R of each display means.
S, Rll...The switching transistor 9 connected to RN4 and with its terminal grounded, and the three inverters 11, IV2, V3 connected in series and the first
a resistor RN6 connected between the first inverter IVl and the base of the switching transistor Q3; a resistor RN7 connected in parallel between the first inverter IV and the third inverter IV3; Capacitor C connected in parallel between third inverter IV3
A clock pulse having a predetermined frequency is applied to the base of the switching transistor Q3, and the resistors R3 and R of each of the display means 31...3N are applied to the base of the switching transistor Q3.
N: Controls on/off of the connection between RN4 and ground.

When the signal processing circuit unit 2 outputs a signal indicating warp cutting to the display device, the stopping device uses this signal as a trigger to stop the loom if the rotational phase of the loom at that time is an unfavorable phase to stop the loom. The loom waits until the optimum phase is reached and then stops the loom at the optimum phase. The stopping device includes a memory circuit 41, an AND circuit 42, a stopping means 43, a timing circuit 44, and an AND circuit 45, as shown in FIG.

The memory circuit 41 is connected to the cathodes of the photodiodes LED to LEDN of each display means of the display device 3, and when the photodiodes LEDl to LEDN are turned on, it becomes "on" and maintains the "on" state. Subsequently, signals are output to gate circuits 42 and 45. The timing circuit 44 is connected to a pulse generator (not shown), and during the rotation phase of the loom, the timing circuit 44 takes into consideration the inertia and friction of the loom so that the loom stops at an optimal phase, and advances the loom by a predetermined phase. When a pulse generator that outputs a pulse with a different phase outputs a pulse, it outputs a pulse.

When the obstructing circuit 41 outputs a signal and the timing circuit 44 outputs a signal, the AND circuit 42 becomes "on" and outputs a signal to the stop means 43.

The AND circuit 45 is turned on when both the memory circuit 41 and the timing circuit 44 output signals, and when a signal indicating yarn splicing completion and starting of the loom is input to the terminal 451, the AND circuit 45 turns on the signal processing circuit section 3. A signal is output to 24.

That is, the signal is output later than the output pulse of the AND circuit 42. ．． Stopping means 43
stops the loom at the optimum phase based on the signal output from the AND circuit 42.

In the device of the fourth embodiment having the above configuration, for example, when a certain number of warp threads are cut, the dropper pin 12 attached to the warp thread falls, and the conductive rod of the sensor part that is reciprocating in the running direction of the warp thread is removed. 13. Then, the total length of the conductive rod 13 is 1. A voltage of 110.6 [V] is generated at the output end of the conductor locking band in accordance with the ratio of the distance 1 from the grounded end to the position where the dropper pin 12 falls and abuts. I amplifying section 22 (1, R' which amplifies the voltage v by & times
Outputs R5 voltage V-;

Each circuit element of the signal processing circuit 23 supplies V-0.6 [v] to the gate terminals of thyristors SCRl and SCR2 through diodes D3 and D4, diodes D5 and D6, and so on. ')X2, -0.6
A voltage of [v]×3, . . . -0.6 [v]XN is applied.

For example, if the voltage V is 0.6 [v'1X4 and V<0.6
[] When the relationship of X5 is satisfied, the signal filter SCR, ~S
Voltage is applied to the gate terminal of CR4 and the thyristor SCR
1 to SCR4 are made conductive, power supply voltage is supplied to each of the display means 31 to 34 of the connected display device 3, and each photodiode LED is turned on according to the oscillation frequency of the oscillator 32.
Blink LEDs 1 to 4. The entire width of the warp is divided into n regions by the operator looking at the first to fourth photodiodes LED1 to LED4 which are in a blinking state on the display section of the display device 3 disposed at an appropriate location on the loom, Fourth
The operator can easily know that the cut warp exists in the warp group belonging to the area of the number.

Also, based on the warp cutting signal from the signal processing circuit 23, the stopping device stops the loom at the optimal rotational phase for stopping the loom, so that the loom can be operated quickly and smoothly after the thread splicing work by the worker. This is what makes it possible.

The cut warp detecting device of the fifth embodiment belongs to the third aspect like the third embodiment, and has a length corresponding to the full width of the warp in the direction perpendicular to the warp at an appropriate interval from the lower end of the dropper pin 12. A coil is wound around the outer periphery of a bar member made of a magnetic material and arranged in parallel with each other, and one end of the capacitor is connected to one end of the coil, and the other end is a conductor locking member that is locked to a dropper pin. Connected to the tourniquet, when the warp threads are cut and the dropper pin falls, the coil L and capacitor C form a parallel circuit, and when a certain warp thread is cut, the dropper pin of the rod member wrapped with the coil falls into contact with the cut of a certain warp thread. Focusing on the fact that the inductance L of the coil changes depending on the position and distance to one end, and the resonance constant due to L and C changes, the oscillation frequency of the oscillator is changed accordingly, and the frequency signal is converted into a voltage signal by an F-V converter. The drop contact position of the dropper pin is detected based on the voltage value of the voltage signal, and only the area where the cut warp threads are present is displayed by lighting.

As shown in FIG. 6, the cut warp detection device of the fifth embodiment includes a sensor section 12 that detects the falling position of the dropper pin 12 as a coil inductance, and a resonance and FV conversion based on the signal output from the sensor section 13. a signal processing circuit unit 4 that converts the voltage signal into a voltage signal using a method and processes the voltage signal;
A display device 4 displays to which region the cut warp exists based on the processed signal, and a signal based on the cut of the warp is used as a trigger, and a predetermined timing is determined based on the timing with the rotational phase of the loom. and a stop device that outputs a stop signal to stop the loom. The sensor section 3 has six bar members BMl to BM6 made of magnetic material having a length equal to or longer than the full width of the warp thread group, and is arranged in parallel with six bar members BMl to BM6. It is constructed by winding coils L2, to L26 over the length.

Further, one end of six capacitors C2l to C26 having the same predetermined capacitance is connected to one end of each coil, and the other ends of the capacitors C2 and C26 are connected to the conductor locking band 11 which is locked to the dropper pin 12. When the warp threads are connected and the dropper pins 12 drop and come into contact with the coils C2, ~C26, a closed circuit is formed, and the capacitor C is connected to the coils L2, ~L26.
2l to C26 are connected in parallel. The arrangement, functions, etc. of the remaining rod members are the same as those of the conductive rod 13 of the third embodiment described above, and therefore the description thereof will be omitted. The signal processing circuit section 4 includes a high frequency oscillator 221 and an F-converter 22.
2, a comparison circuit 223 consisting of six comparison circuit elements 223A to 223F, and a reference voltage setting circuit 224.

The oscillator 221 consists of a high-frequency oscillation circuit, and is connected to the positive and negative poles of the capacitors C2l to C26, and the inductance of the coils L2l to L26 and the capacitance of the capacitor correspond to the position where the warp threads are cut and the dropper pin falls and contacts. It oscillates with resonance characteristics determined by and outputs a signal at a predetermined frequency.

The F-V converter 222 is connected to the oscillator and the oscillator 2
A voltage signal corresponding to the oscillation frequency outputted by 21 is output. The reference voltage setting unit 224 connects the DC power supply DV and five resistors RA-RE in series between the ground.

The resistance value of each resistor RA-RE is as follows:
6 from one end to the other end of the rod member BMl wrapped with a coil.
When divided into equal parts, the voltage is set so that the voltage is outputted by the F-converter when the dropper pin 12 falls into contact with the boundary between these six areas. The first comparison circuit element 223A of the comparison circuit 223 has a positive input terminal connected to the F-V converter 22.
a comparator CM, which is connected to the output terminal of the comparator CMl, and whose negative input waterfall is connected to the point A of the reference voltage setting section; and a resistor R, whose one end is connected to the output terminal of the comparator CMl.
Ml, and a switching transistor T whose collector is connected to the other end of the resistor RM and whose emitter is grounded.
Ml, a resistor RNl connected between the base of the switching transistor TM and the comparator CM2 of the second comparison circuit element 223B, and a diode whose cathode and anode are grounded to the collector of the transistor TMl. The second comparison circuit element 223B to the fifth comparison circuit element 223E have exactly the same configuration except for the first circuit element and the reference voltage supplied to the negative pole, so a description thereof will be omitted.

The sixth comparison circuit element 223F is the same except that it does not have a switching transistor and a resistor connected to the base of the transistor because it is the final stage. This comparison circuit 223 first connects the comparator CMl of the first comparison circuit element 223A with the output voltage of the F-V converter 222.
outputs a signal, but the next second comparison circuit element 223B
When the comparator CM2 outputs a signal, a voltage is applied to the base of the switching transistor TM of the first circuit element 223A via the resistor RN to turn on the switching transistor TM. The output of CM1 is grounded through the collector and emitter of the transistor, and does not light up the display lamp of the display device, which will be described later.

Therefore, in this embodiment, only the indicator lamp corresponding to the area to which the cut warp belongs is turned on. The display device 14 is
Each comparison circuit element 223A of the signal processing circuit section 1 ~
It consists of six indicator lamps 3L1 to 3L6 connected between the other ends of resistors RM and RM6 of 223F and ground.

The six lamps 3L1 to 3L6 are separately arranged in easily visible parts of the loom at positions corresponding to areas obtained by dividing the entire width of the warp group into six equal parts.

Therefore, the operator can easily and quickly find the cut warp by simply checking the warp in the area to which the lit indicator lamp belongs. In the cut warp detection device of the fourth embodiment having the above configuration, when a certain warp is cut and the dropper pin 12 supported by the warp falls due to its own weight, it comes into contact with a conductive rod made of a coil.

Then, the oscillator 221 of the signal processing circuit section 4 oscillates at a resonant frequency determined by the inductance of the conductive rod consisting of a coil determined by the contact position of the dropper pin 12 and the capacitance of the capacitor connected in parallel, and the frequency signal is generated. is converted into a voltage signal according to the frequency by an F-converter, and applied to the positive input terminals of comparison circuit 223 and each comparison circuit element 223A to 223F. Each comparison circuit element 223A~
223F, the applied voltage is the reference voltage setting circuit 2.
Those higher than the reference voltage set at 24 are turned on and output a signal. For example, the third comparison circuit element 22
3A to 223C are turned on, the first and second elements 223A, 223B are turned on, and the second and third elements 223B, 223C are turned on,
Switching transistors TM1 and TM2 are turned on and their outputs are grounded. Therefore, only the third comparison circuit element 223C outputs a signal, and only the third display means 3L3 of the display device 4 connected to the third comparison circuit element 223C is turned on, thereby notifying the operator. It is notified that the warp belonging to the third area has been cut. Therefore, the operator only needs to examine the third area, so the time required to stop the loom for finding the cut warp yarns and splicing the yarns is very short.

The fifth embodiment also has the advantage of increasing the productivity of the loom, similar to the previous embodiments. In summary, the present invention
A sensor section that outputs different electrical signals depending on the contact position of the dropper pin supported by the cut warp threads to the conductive rod, and a signal processing circuit that processes the electrical signal from the sensor section and detects the position. This is a cut warp detection device comprising a section and a display device for displaying the position in the width direction of a warp group of cut warps based on a signal from the signal processing circuit section. Therefore, the present invention has the effect of increasing the productivity of the loom by making it possible to easily find cut warp threads with a simple and inexpensive device, and minimizing the downtime of the loom. play.

Furthermore, the present invention has unique effects in each of the three aspects. Although the second embodiment has been described as an embodiment belonging to the second aspect, the following embodiments also have similar effects.

The first one, as shown in FIG. 7, connects resistors r1 to R6 with different resistance values connected to a DC power supply DC to a plurality of conductive parts A1 to A6 constituting a plurality of regions of the conductive rod of the sensor part. A fixed resistor R is connected to each other, and one end is grounded to one end of the conductor locking band.

are connected to form the sensor section, and the current flowing through the circuit changes depending on which area the dropper pin comes into contact with when the warp threads are cut, and the fixed resistance R is connected. If it is detected as a voltage change, it is possible to light up the display means of the area to which the cut warp belongs, as in the second embodiment. The second one is a plurality of regions (conductive parts) constituting the conductive rod, as shown in Fig. 8.
If AC signals of different frequencies are applied to the warp threads and the warp threads are cut and the dropper pin abuts on a certain area, then in Fig. The subsequent processing is to convert it into a voltage using an F-V converter as in the fifth embodiment, and to compare the voltage values to display that, for example, a warp belonging to the third area has been cut. Can be done.

In the figure, 0SC is a basic oscillator, and 0S1 to 0S3 are frequency dividers. The third method is to apply different capacitances C1 to C4 to a plurality of regions A1 to A4 constituting the conductive rod as shown in FIG.
.

= J Yahi Ei. If you want to use it privately as a DC voltage, you just need to detect it. Furthermore, although the above-mentioned third embodiment, which belongs to the third aspect of the present invention, has a sensor section configured in the same manner as the first embodiment, the conductor locking body 1 is
1 is grounded, so in order to do this, the power supply section 21 and the amplification section 22 of the signal processing circuit section 3 may be configured in the same manner as in the first embodiment.

It is also possible to use a differential amplifier constituting an input circuit as shown in FIG. In addition, in the third embodiment, if the cathodes of the display means LED, -LEDN of the display device 13 are connected to the input end of the storage circuit 41 of the stop device via a switch, the width can be reduced in the case of a normal fabric. In the case of 2-width or 4-width fabrics, even if the warp threads are cut at both ends of the fabric, or in the portions corresponding to the ``sleeves'' of the fabric, it will not have a major effect on the fabric, so it is especially unattended. If the loom is running all day and night, stopping the loom to cut the warp threads in these areas will reduce productivity. Even if warp threads are cut, the loom can continue operating without stopping.

In addition, the present invention can be modified in many ways without departing from the spirit of the claims.

[Brief explanation of drawings]

1 to 3 are diagrams explaining a first embodiment of the present invention, FIG. 4 is a circuit diagram showing a second embodiment of the present invention, and FIG. 5 is a circuit diagram of a third embodiment of the present invention. FIG. 6 is a circuit diagram showing a fourth embodiment of the present invention, and FIGS. 7 to 10 are circuit diagrams showing modifications of the present invention. In the figure, I is a sensor section, is a signal processing circuit section, is a display device,
is a stop device, 11 is a conductor locking band, 12 is a dropper pin,
Reference numeral 13 indicates a conductive rod.

Claims (1)

[Scope of Claims] 1. Dropper pins made of conductors that are supported by each warp and are arranged in rows in the width direction of the warp group, and conductor locking bodies that are interposed and locked on the rows of dropper pins. and has a length that at least matches the width of the warp group, and when the dropper pin is supported by the warp threads, there is no contact, the warp threads are cut, the dropper pin falls under its own weight, and is supported by the conductor locking body. In this state, multiple devices are arranged in parallel at positions where they touch each other, and a predetermined electrical input is applied to increase the amount of electrical impedance.
a sensor section that outputs different electrical signals depending on the position in the width direction of the warp group of cut warp threads; and a sensor section that is connected to the sensor section and processes the electrical signals from the sensor section. a signal processing circuit unit that detects the position in the width direction of the warp group of the cut warp threads and outputs an electric signal corresponding to the position of the warp stop group of the cut warp threads in the width direction in order to display the detected position; A cut warp detection device comprising: a display device that displays the position of a warp group of cut warp threads in the width direction based on an electric signal from a signal processing circuit unit. 2. The conductive rod of the sensor section is composed of a resistance wire, a coil, a capacitor, or anything that can be treated as an impedance element equivalent to these, and the conductivity due to the weight of the dropper pin supported by cutting the warp threads. The cut warp detection device according to claim 1, wherein the detection is performed as an impedance amount proportional to the position of contact with the rod. 3. The sensor section is divided into a plurality of regions corresponding to the width of the warp group of the conductive rod, and outputs different electric signals corresponding to the divided region to which the position in the width direction of the warp group of the cut warp belongs. A cut warp detection device according to claim 1, characterized in that: 4 The signal processing circuit section processes the electrical signal of the impedance amount corresponding to the position in the width direction of the warp group of the cut warp threads from the sensor section, and determines that the position in the width direction of the warp group of the cut warp threads is the warp thread. It determines which of the divided areas corresponds to the width of the group, and outputs a signal to the display means of the display device corresponding to the area to which the position in the width direction of the warp group of the cut warp belongs. 3. The cut warp detection device according to claim 2, wherein the device lights up a display device among the plurality of display devices corresponding to an area to which a position in the width direction of the warp group of the cut warp belongs. 5. The signal processing circuit section has the same number of circuit elements as the divided regions of the conductive rod of the sensor section, and each of the circuit elements is connected in parallel to the pair of output ends of the sensor section, and the circuit elements are connected in parallel to the pair of output ends of the sensor section, and The device is connected to display means for displaying the number of divided regions, and a signal is output from the circuit element of the signal processing circuit corresponding to the region where the warp yarn is cut and the dropper pin abuts on any region of the conductive rod. The cut warp yarn detection device according to claim 3, wherein the cut warp yarn detection device outputs an output and lights up a display means of a display device connected to the circuit element. 6. Each divided area of the conductive rod outputs a quantitatively or qualitatively different signal due to the contact of the dropper pin caused by cutting the warp threads, and the signal processing circuit section determines whether the dropper pin is connected to the conductive rod based on such signals. 4. The cut warp yarn detection device according to claim 3, wherein the cut warp thread detection device determines which region the cut warp threads have come into contact with, and lights up a display means of a display device corresponding to the region.