JPH0141586B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a yarn breakage monitoring device for spinning machines, twisting machines, winding machines, etc. (hereinafter referred to as spinning machines, etc. in this application), and more specifically, it is capable of transmitting a signal depending on the presence or absence of yarn for each spindle. A spinning spinning machine is equipped with thread breakage detection heads of the above-mentioned type, and the signals from these stationary thread breakage detection heads are sent to a discrimination device at the end of the machine frame for each spindle to monitor thread breaks for each spindle. The present invention relates to thread breakage monitoring devices such as the above. In spinning machines, etc., if thread breaks occur and are left unattended, not only will operational efficiency be reduced and raw materials be wasted, but the thread may also wind around the draft roller or jam the newer. This is known to cause damage to the machine. For this reason, workers now regularly patrol spinning machines, etc.
When a thread breakage is discovered, the thread is repaired on the spot. However, manually detecting thread breakage by a worker not only increases worker fatigue and requires a large number of workers, but also causes problems such as failure to detect thread breakage. It was hot. Therefore, in order to solve the above problem, a device has been developed in which a thread breakage detection head is attached to each spindle, and the signals from these thread breakage detection heads are sent to a discrimination device at the end of the machine. Some suggestions have been made.
However, these conventional devices monitor the presence or absence of thread breakage for each weight row or group of weights, and are unable to monitor thread breakage for each weight. In addition, in order to monitor thread breakage for each spindle based on conventional equipment,
It is conceivable to wire each yarn breakage detection head to the discrimination device individually, but as is well known, spinning machines have a large number of spindles, so the number of wires and the length of the wires are extremely large, resulting in high costs. However, there was a problem that the wiring space became large and it was not practical. Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, and even if it is a stationary thread breakage monitoring device in which a thread breakage detection head is provided for each spindle, it is extremely easy to detect thread breakage for each spindle. The purpose of the present invention is to provide a thread breakage monitoring device for spinning machines, etc., which can quickly and accurately detect yarn breakage even with various devices, and which can extremely reduce the number and length of wires required between each spindle.
A storage circuit is provided for each spindle that can simultaneously store the signals from the yarn breakage detection head using a data latch signal, and each storage circuit is configured to change its storage signal from one end side to the other end side using a shift signal. A scanning device that repeats at predetermined time intervals the operation of sequentially shifting data latch signals and shift signals to each memory circuit at the end of the machine. The apparatus is characterized in that it is provided with a control device that counts and stores the number of thread breakages for each spindle based on the number of times the shift signal is transmitted and the thread breakage signal at that time. Next, embodiments of the present application will be described based on the drawings. In Figures 1 to 4, 1 is the frame of a spinning machine;
2 is a weight, 3 is a ring rail, and a ring 5 for guiding a traveler 4 for each weight 2 is attached to this ring rail 3. 6 is a separator bar attached to a support leg 7 fixed to the ring rail 3 or lifting rod top 30; 8 is a synthetic resin separator attached to this separator bar 6 with a mounting screw 29; 2 and on both outer sides of the weight 2 at both end positions. This separator 8 has a thick wall portion 8a in which the lower part, which does not perform the function of separating the threads, is larger than the other parts, and the middle part and the upper part, which perform the function of separating the threads, have approximately the same thickness as conventional separators. It is formed in a thin portion 8b having a thick dimension. A storage space 9 is formed within the thick portion 8a of the separator 8 and is open only to the back and bottom surfaces of the separator 8, in which a yarn breakage detection head and a memory circuit, which will be described later, can be stored therein. This storage space 9 consists of a lower storage space 9a and an upper storage space 9b that are continuous with each other, and the lower space 9a is at approximately the same height as the turning trajectory of the traveler 4 as shown in FIG. 2, and as shown in FIG. It is formed at a position on the line connecting the weights 2 to each other, that is, at a position closest to the turning trajectory of the traveler 4. Next, in the storage space 9 of the separator 8 corresponding to each weight 2 (in this embodiment, the separator 8 located on the left side of each weight 2 in FIG. A thread breakage detection head 10 capable of transmitting a corresponding signal and a storage circuit 11 capable of storing the signal from the thread breakage detection head 10 in response to an external data latch signal are respectively built-in. As a result, a thread breakage detection head 10 and a memory circuit 11 are attached to each spindle 2 of the spinning machine. This yarn breakage detection head 10 is an electromagnetic detector 1 that detects the presence or absence of yarn by using the electromagnetic induction effect caused by the traveling of the traveler 4 on the ring 5.
2 and an amplifier 13 for amplifying or amplifying and shaping the signal from this detector 12, and this detector 12 is fixedly housed in the lower housing space 9a with adhesive or the like, and the amplifier 13 It is assembled together with the circuit 11 on the printed circuit board 14 and fixedly stored in the upper storage space 9b. The detector 12 has a permanent magnet 1 as shown in FIGS.
2a, an iron core 12b whose one end is fixed to the permanent magnet 12a and whose other end is bent toward the corresponding weight 2, a coil 12c wound around the middle part of the iron core 12b, and the above-mentioned permanent magnet 12a,
It is composed of an iron core 12b and an iron plate 12d arranged on the side opposite to the corresponding weight 2 side of the coil 12c,
A magnetic field is formed in the orbit of the traveler 4 of the corresponding weight 2 by the permanent magnet 12a and the iron core 12b, and no magnetic field is formed in the orbit of the traveler 4 of the opposite weight 2 due to the action of the iron plate 12d. It's becoming like that. As shown in FIG. 7, the memory circuit 11 includes an AND gate circuit 15 and a D-type flip-flop 16 (hereinafter also referred to as D-type FF 16).
One input terminal 15 of this AND gate circuit 15
a is connected to the amplifier 13, and the other input terminal 15b is connected to the data latch signal line 18 via the connector 17.
The output terminal 15c of the AND gate circuit 15 is connected to a preset terminal (hereinafter referred to as PS terminal) of the D-type FF 16. This D
The FF16 operates as shown in the truth table in Table 1. When a high-level signal is applied to the PS terminal, other input terminals (hereinafter referred to as the D terminal) and counter clock terminal (hereinafter referred to as the CK terminal) are activated. ), the output terminal (hereinafter referred to as the Q terminal) outputs a high level signal, and when a clock pulse signal is applied to the CK terminal while the PS terminal is at a low level, the D The high or low level signal of the terminal is memorized and the Q terminal outputs that signal, and even if the D terminal changes thereafter, that state is maintained until the next clock pulse signal is applied to the CK terminal. There is. Therefore, the input of the AND gate circuit 15

[Table] If there is a signal from the thread breakage detection head 10 during the time when the data latch signal is applied to the force terminal 15b (if the thread is not broken), the Q of the D type FF 16
If the terminal is set to high level and there is no signal from the thread breakage detection head 10 (if the thread is broken),
The Q terminal is maintained at a low level, so that the yarn breakage state of each weight 2 at that time is stored in the D-type FF 16 corresponding to that weight 2. A power terminal 19a and a ground terminal 19b of the yarn breakage detection head 10 and the memory circuit 11 are connected to a power line 18a and a ground line 18b via a connector 17, respectively. Next, except for those corresponding to the weights 2 at both ends of each D-type FF16, the remaining ones are located on one side (on the left side in the drawing) of the D-type FF16 where the D terminals are adjacent, as shown in FIGS. 8 and 9. The Q terminal is connected to the D terminal of the other side through the connector 17 and the data line 18e, and all the D
The CK terminal of the FF16 is connected to a shift signal line 18d via a connector 17, thereby forming a shift register 20 as a whole. This shift register 20 is configured such that when a shift signal consisting of a clock pulse signal is applied to the shift signal line 18d, the signal (high level signal or low level signal) written in each D type FF 16 changes to 1 every time the shift signal is applied. D on the output side (right side in the drawing)
from the Q terminal of the D-type FF16 at the final output end (the rightmost end in the drawing) to each D-type FF1.
The signals stored in 6 are sequentially output every time a shift signal is input. The Q terminal of the D-type FF 16 at the final output end is connected to a discriminating device to be described later. The above power wire 18a, ground wire 18
b, data latch signal line 18c, shift signal line 1
8d and data line 18e are connected to one bus bar 18.
The bus bar 18 is disposed along the separator bar 6 in a space behind the separator bar 6, as shown in FIGS. 2, 3, and 6. The left side of this bus bar 18 is connected to a termination resistor 21 for impedance matching, as shown in FIG. The D terminal of the D-type FF 16 at the input side end (the leftmost end in the drawing) of the shift register 20 is connected to the terminating resistor 21 so that the D terminal is always at a low level, and the shift signal line Every time a shift signal is applied to FF 18d, the stored signals are reset to a low level signal starting from the leftmost D-type FF 16. Therefore, each D-type FF 16 can be cleared by applying a shift signal to the shift signal line 18d. Next, at the out-end end of the frame 1 of the spinning machine, a data latch signal is transmitted to each memory circuit 11 for a certain period of time t (for example, 0.03 seconds), and then a shift signal is transmitted for a certain period of time T (for example, 0.03 seconds). 1 second)
a scanning device 22 configured to repeat the scanning every other time;
A determining device 23 capable of determining the presence or absence of a storage signal transmitted from the Q terminal of the storage circuit 11 at the final output end in relation to the shift signal of the scanning device 22.
and a processing device 24 that performs processing such as an alarm based on the discrimination signal of the discrimination device 23. As shown in FIGS. 10 and 11, in the scanning device 22, when the machine operation switch 23a is turned on, a shift signal is first applied to the shift signal line 18d, and the D-type FF 16 of each memory circuit 11 is set to a low level. Then, after a predetermined time T has elapsed, the data latch signal C is transmitted to the data latch signal line 18c for a certain period of time t, so that each D-type FF 16 memorizes a signal corresponding to the presence or absence of thread at that time, and then the shift signal line 18d is The storage signal of each D-type FF16 is sequentially outputted from the Q terminal of the D-type FF16 at the final output terminal by transmitting a shift signal to the data latch signal line 18c, and then, after a predetermined time T has elapsed, the data latch signal C is transmitted again to the data latch signal line 18c. It is electrically configured to repeat the above scanning until the full tube switch 23b is turned on. The discriminating device 23 detects the D-type FF 16 at the final output terminal every time the shift signal is transmitted.
It is configured to discriminate between high and low levels of the memory signal output from the Q terminal of the spindle 2, and to output a thread breakage signal as a discrimination signal only when this memory signal changes from high level to low level at the weight 2. Based on the presence or absence of a thread breakage signal output from the discrimination device 23, it is possible to determine whether or not there is a thread breakage at each weight 2. Next, the processing device 24 can notify the worker of the occurrence of thread breakage in any of the weights 2 based on the thread breakage signal from the discrimination device 23 by lighting a lamp, making a buzzer sound, etc. An alarm device 25 and a counter 26 capable of counting and displaying the total number of thread breakages for each two rows of weights or for each machine based on the thread breakage signal.
and a control device 27 capable of processing data regarding yarn breakage based on the yarn breakage signal from the discriminating device 23 and the shift signal from the scanning device 22. Considering its function, the above-mentioned alarm device 25 needs to be provided in the spinning machine at all times.
It is specially attached to the end of the machine. This alarm device 25 is designed to issue an alarm when thread breakage occurs in a preset number of weights 2. It is preferable that the above-mentioned counter 26 is always provided in the spinning machine for production control and machine management, and this counter 26 is also specially attached to the end of the machine frame.
The control device 27 uses a microcomputer to count the number of yarn breakages for each spindle 2, the total number of yarn breakages at the start of spinning, the number of yarn breakages for each doffing, and the duration of yarn breakage. The apparatus is configured to be able to perform calculations such as calculation of the average value of , calculation of production loss caused by yarn breakage, etc., and storage and display of the results of these calculations. Considering its function, it is sufficient to temporarily provide this control device 27 in the spinning machine, and as shown in FIG. There is. Further, this control device 27 is connected to the discrimination device 23 via a connector 28. The control device 27 is attached to the machine base 1 by placing the control device 27 on the mounting surface 1a of the machine base 1, but the control device 27 is mounted on a movable trolley. This may be done by positioning the lever truck near the machine platform 1. The purpose of the control device 27 is to investigate the state of yarn breakage related to the operating state, maintenance state, various spinning conditions, etc. of the spinning machine, and it requires at least the calculations among the above calculations. , and other calculations can be freely omitted, and it is also possible to perform calculations other than those described above by changing the program. Next, the operation of monitoring yarn breakage in a spinning machine using the yarn breakage monitoring device configured as described above will be described. Generally, a large number of spinning machines are installed and operated in each factory, and when monitoring thread breakage on spinning machines, it is important to monitor each spinning machine in the factory for thread breakage in order to manage production and machines. It is preferable. In this case, in the yarn breakage monitoring device of this embodiment, the processing device 24 is composed of an alarm device 25, a counter 26, and a control device 27, and the alarm device 25, which must be always provided in the spinning machine, A counter 26, which is preferably provided, is attached exclusively to the machine frame 1, and a control device 27, which is sufficient to be temporarily provided in the spinning machine, is constructed in a portable manner so that it can be freely removed from the machine frame 1. Therefore, the spinning machines in the factory are divided into groups of many machines, and only one spinning machine in each group is equipped with the thread breakage monitoring device of the embodiment of the present application, and the other spinning machines are equipped with the thread breakage monitoring device. Equipped with the thread breakage monitoring device of the embodiment of the present application with the control device 27 removed, and the control device 27 of the embodiment of the present application is shared at different times for monitoring yarn breakage in other spinning machines in the group. Can be done. Therefore, the control device 27, which is relatively expensive, is provided in only one of the many spinning machines in each group, and the alarm device 25 and counter 26, which can be prepared at a relatively low cost, are installed in the other many spinning machines. By simply providing the thread breakage monitoring device as a processing device, all spinning machines can be equipped with the thread breakage monitoring device according to the embodiment of the present application at different times, thereby significantly reducing the cost required for monitoring thread breakage in each spinning machine. be able to. If you wish to use the control device 27 to process yarn breakage data for another spinning machine, pull out the plug 28a of the connector 28 from the socket 28b and connect the control device 27 to the mounting surface 1 of the desired machine frame 1.
a, and then insert it into the socket 28b of this machine 1.
This can be done by inserting the plug 28a into the. Next, turn on the machine operation switch 23a of the spinning machine.
When the spinning operation is started, each spindle 2 starts winding the thread onto the bobbin, and the thread rotates the traveler 4 on the ring 5. At the same time, the thread breakage monitoring device enters the thread breakage monitoring state, and the next Yarn breakage monitoring at each weight 2 is started as follows. First, if the thread at each weight 2 is not broken at each weight 2 position, this thread causes the traveler 4 on the ring 5 to rotate, and each time this traveler 4 rotates, the thread breaks within the magnetic field of the detector 12 of the thread breakage detection head 10. cross. As a result, an electromagnetic induction current is generated in the coil 12c of the detector 12 as shown in FIG. 14A, and a signal A based on this current is output from the detector 12. Detector 1
The signal A from 2 is amplified and waveform-shaped by an amplifier 13 and converted into a pulse signal B as shown in FIG. 14A. Furthermore, if the thread at each weight 2 is cut at each weight 2 position, the rotation of the traveler 4 is stopped, so that the pulse signal is not output from the detector 12 and the amplifier 13 as shown in FIG. 14B. do not have. On the other hand, the machine operation switch 2
3a, the scanning device 22 sends a shift signal to the shift signal line 18d as shown in FIG.
16 to a low level to perform a clearing operation, and after a predetermined time T, the data latch signal line 1
At 8c, the first data latch signal C is applied for a certain period of time t.
Send. By transmitting the data latch signal C, the AND gate circuit 15 of each memory circuit 11 determines that if the pulse signal B is input from the amplifier 13 while the data latch signal is being input, that is, if the thread is not broken, the signal shown in FIG. Output the thread signal d as shown,
This thread signal D is input to the PS terminal of the D-type FF 16, and the Q terminal of the D-type FF 16 is set and held at a high level. On the other hand, if the pulse signal B is not input from the amplifier 13 while the data latch signal is being input, that is, When the thread is broken, the AND gate circuit 15 does not output the thread signal D as shown in FIG. 14B, and the Q terminal of the D-type FF 16 is held at a low level. Therefore, by transmitting the data latch signal C, the yarn breakage state at each weight 2 at the time of transmission is stored in the D-type FF 16 corresponding to each weight 2 as a low level state. Since the presence or absence of thread breakage in each of the weights 2 is detected in the storage space 9 formed in the separator 8, the thread breakage detection head 10 and memory circuit 11 are not affected by external forces associated with machine operation. It is less susceptible to damage and can also prevent functional deterioration due to the adhesion of fluff, making it possible to reliably detect yarn breakage over a long period of time. When the transmission of the data latch signal C is completed, the scanning device 22 transmits a shift signal H to the shift signal line 18d. By sending this shift signal, the shift signal is simultaneously input to the CK terminal of each D-type FF 16 that constitutes the shift register 20, so that the stored signal of each D-type FF 16 is sent to the output side for each shift signal. Shifted by one. Therefore, the Q of the D type FF16 at the final output terminal is
From the terminal, first, when the input to the shift signal is 0 times, the memory signal of the weight 2 at the final output terminal is output, and when the input to the shift signal is 1 time, the memory signal from the second mass 2 from the final output terminal side is output. The memory signal at is output,
When the input to the shift signal is N-1 times, the memory signal at the Nth weight 2 from the final output end side is output,
These stored signals are input to the determining device 23, and the presence or absence of thread breakage at each weight 2 is determined. This discrimination device 23 outputs a discrimination signal, either a thread presence signal or a thread breakage signal, depending on the presence or absence of thread breakage every time the memory circuit is inputted, and this discrimination signal is sent to the processing device 23.
is input to the alarm device 25 and counter 26.
This alarm device 25 receives a thread breakage signal from the discriminating device 23 a preset number of times (for example, once or twice).
(times) is input, a warning is issued by lighting a lamp or sounding a buzzer. Therefore, the worker only has to go to the position of the spindle 2 of the spinning machine in accordance with the alarm from the alarm device 25 and splice the yarn using the thread cutting weight 2.
Repair of broken threads can be done quickly and with less effort. The counter 26 counts and displays the number of thread breakage signals inputted from the determining device 23. The above operations are performed in all spinning machines regardless of the presence or absence of the control device 27. In addition, the control device 27
In the yarn breakage monitoring device for the spinning machine to which the spinning machine is attached, the discrimination signal from the discrimination device 23 is input to the control device 27. In this control device 27, the discrimination signals inputted sequentially for each weight 2 from the discrimination device 23 are stored for each weight. Transmission to the above shift signal is stopped after this shift signal has been transmitted the same number of times as the number of weights 2, and thereby the reading of the memory signal stored in each D type FF 16 is completed, and at the same time, the Q of each D type FF 16 is transmitted. The pin is cleared to a low level. Thereafter, after a predetermined time T has elapsed, the scanning device 2
2 transmits the second data latch signal C, repeats the detection of thread breakage at each weight 2 and reading of the detected signal, and thereafter the above operation is performed by the full tube switch 23.
This is repeated until b is turned ON. In this case, a signal indicating the number of data latch signals is also input to the control device 27, and by comparing it with a previously stored signal, it becomes possible to calculate the thread breakage duration, etc. After that, this full pipe switch 23b
When turned ON, the transmission of the data latch signal and shift signal is stopped, and doffing of a full bobbin is performed. At this point, counter 26
The total number of thread breakages for all spindles 2 is displayed, and the control device 27 stores data regarding thread breakages for each spindle 2 during one bobbin winding for each spindle, and calculates the number of thread breakages input in advance in the program. The results are displayed as needed or all the time. The results of these calculations are displayed using a display device, a printer, or the like. The calculation in the control device 27 can be performed by counting the thread breakage signals from the discrimination device 23 for each input order, and the calculation is performed by summing up the number of thread breaks at the time of starting the machine, that is, when transmitting the first data latch signal. The calculation can be performed by calculating the total number of thread breakages from the start of the machine until after a predetermined period of time has elapsed. This can be done by averaging the time it takes for the data latch signal to be input (which can be determined by the number of times the data latch signal is sent).
The calculation can be easily performed based on the total yarn breakage duration. After replacing the full bobbin, the machine operation switch 23a is turned on again to start winding the thread onto the next bobbin, but in this case, the counter 26 starts counting after being reset to zero. 15 to 17 show different embodiments of the present application, in which one input terminal 15b _E of the AND gate circuit 15E is connected to one output terminal 30a of the polarity discrimination circuit 30, and the CK terminal of the D-type FF 16E is connected to the above A memory circuit 11E is configured by being connected to the other output terminal 30b of the polarity discrimination circuit 30, and the input terminal of the polarity discrimination circuit 30 is connected to the scanning signal line 18.
Connected to cE. If a signal of negative polarity is input to the input terminal of the polarity discrimination circuit 30, a signal is output to the output terminal 30a connected to the AND gate circuit 15E, and if a signal of positive polarity is input to the input terminal, the signal is output to the CK terminal. A signal is outputted to an output terminal 30b connected to. The scanning device 22E is configured to transmit a negative polarity data latch signal C to the scanning signal line 18cE, and then transmit a positive polarity shift signal to the scanning signal line 18cE. Therefore, in this embodiment, each memory circuit 11E and the discriminating device 23E can be wired with one less connection line than in the above embodiment. For this example and the next example, the same reference numerals as those of parts that are considered to have the same or equivalent configuration as those of the above example are given the letters E and F, respectively, and important explanations will be omitted. . Since FIG. 18 shows another different embodiment of the present application, a JK type flip-flop 16F (hereinafter referred to as JK type FF16F) is used for each memory circuit 11F,
Using this JK type FF16F, shift register 2
This is a configuration of 0F. That is, JK type FF16
One JK type FF1 where the J terminal and K terminal of F are adjacent
The Q terminal and the Q terminal are respectively connected to the J terminal and K terminal of the other adjacent JK type FF16F, and the input terminal is the JK type FF.
The K terminal of 16F is grounded via a knot circuit 31. In the above embodiment, the thread breakage detection head and the memory circuit are housed in the storage space of the separator, but they may be attached outside the separator or provided in the rappet section, or they may be used as the thread breakage detection head. is not limited to electromagnetic type; photoelectric type uses a phototube to detect the presence or absence of thread, vibratory type detects the presence or absence of thread by using vibrations of a thread guide, etc. It may also be an audio type that searches using sounds. Further, in the above embodiment, a control device for calculating data regarding thread breakage is detachably attached to the machine base, but this control device may be attached exclusively to the machine base, and in this case, Part of the functions of the scanning device, discrimination device, alarm device, and counter may be incorporated into the microcomputer of the control device. As described above, in the present invention, the signals of the thread breakage detection head are simultaneously stored using the data latch signal, and the stored signals are sequentially shifted, so that the scanning time for thread breakage detection is extremely shortened. As a result, it is possible to accurately and quickly notify the thread breakage from time to time, thereby reducing the reduction in operating efficiency and the waste of raw materials due to thread breakage. In addition, the operation of sequentially transmitting a data latch signal and a shift signal to each storage circuit is repeated at predetermined time intervals, and the signal of the thread breakage detection head is stored in the storage circuit by the data latch signal, and the stored signal is sequentially transmitted by the shift signal. The system determines the presence or absence of thread breakage by shifting, and counts and stores the number of thread breakages for each spindle based on the number of shift signals and the thread breakage signal at that time. It can detect time, discover defective weights, and calculate production losses. Furthermore, even if thread breakage is to be monitored for each spindle, the memory circuits provided for each spindle themselves are connected in sequence to form a shift register, and the memory signals of each memory circuit are sequentially transmitted by the shift signal. Since the presence or absence of thread breakage is determined for each spindle, the device for transmitting the signal from the thread breakage detection head to the discrimination device can be made extremely easily, reducing the overall cost and reducing the number of wires between each spindle. It can be easily wired in small spaces.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a plan view of a spinning machine equipped with a thread breakage monitoring device, FIG. 2 is an enlarged sectional view taken along the line -- in FIG. - line sectional view, Fig. 4 is a - line sectional view of Fig. 2, Fig. 5 is a rear view of the separator, Fig. 6 is a perspective view of the weight section, and Fig. 7 is a circuit explanatory diagram of the thread breakage detection head section. , Fig. 8 is an explanatory diagram of the shift register circuit, Fig. 9 is an explanatory diagram of the circuit of the thread breakage monitoring device, and Fig. 1 is an explanatory diagram of the circuit of the shift register.
Fig. 0 is a circuit explanatory diagram of the processing device part, Fig. 11 is a signal waveform diagram, Fig. 12 is a perspective view of the processing device part at the end of the machine, Fig. 13 is an explanatory diagram of use, Fig. 14 is a signal explanatory diagram, Fig. 15 is a circuit explanatory diagram showing different embodiments of the memory circuit, Fig. 16 is a circuit diagram of a shift register, Fig. 17 is a signal waveform diagram, and Fig. 18 is a circuit explanatory diagram showing different embodiments of the memory circuit. be. DESCRIPTION OF SYMBOLS 1... Machine base, 2... Weight, 10... Thread breakage detection head, 11... Memory circuit, 20... Shift register, 22... Scanning device, 23... Discrimination device, 2
4... Processing device.

Claims (1)

[Claims] 1. A thread breakage detection head is provided for each spindle of a spinning machine, etc., which can send a signal depending on the presence or absence of thread at the spindle position,
At the end of the machine, there is a discrimination device capable of discriminating a signal based on the detection signal of the thread breakage detection head and transmitting a thread presence signal or a thread breakage signal, and an alarm device capable of issuing an alarm when the thread breakage signal is received a predetermined number of times. In a thread breakage monitoring device for a spinning machine, etc., a memory circuit is provided for each spindle that can simultaneously store the signals from the thread breakage detection head using a data latch signal, and each memory circuit is connected to its own memory signal. A shift register is constructed by connecting the shift register so that the data is shifted one by one from one end to the other end in order to be input to the discriminator, and a data latch signal is sent to each storage circuit at the end of the machine. and a control device that counts and stores the number of thread breakages for each spindle based on the number of transmissions of the shift signal and the thread breakage signal at that time. Thread breakage monitoring device for spinning machines, etc.