JPS5817112B2 - Yarn length management device for multi-spindle automatic winding machine - Google Patents

Description

[Detailed Description of the Invention] When automatically installing and replacing bobbins with a multi-spindle bobbin machine for finishing small bobbins such as sewing thread, it is important to keep the thread length of the finished bobbins constant. These are the conditions.

However, when bobbins that have been wound to a certain length are automatically replaced with empty bobbins one after another, the equipment becomes extremely complex and expensive.

For this reason, an apparatus is used in which a multi-axis winding core is provided as a power source and a simultaneous doffing system is used in which bobbins are automatically exchanged all at once.

However, when the number of rotations of the drive shaft reaches a predetermined value, or when the outer diameter of the representative winding yarn reaches a predetermined value, doffing is performed all at once, so changes in the thread count, There was a drawback that the thread lengths were significantly uneven due to differences and changes in the thread tension between each thread, as well as slippage between the drive shaft and the thread bobbin.

For example, JIS specifies the thread length range for this type of winding thread from 11 threads to +9 threads, but the number of finished bobbins that deviate from this range reaches 25 threads, and the correction operation is complicated and time-consuming. The labor-saving effect of automatic machines has been halved.

The present invention seeks to obviate the above-mentioned drawbacks.

The present invention provides an automatic thread winding machine having a plurality of winding shafts, which has a rotating wheel that rotates integrally with the running yarn in correspondence with each winding bobbin, and an electric motor that generates pulses as the rotating wheel rotates. A length measuring detector constituted by a detector is provided, and the output pulse of the length measuring detector is applied in parallel to a counter set to the full yarn length of the winding bobbin and a yarn running detector, The outputs of the thread travel detector and the thread travel detector are connected in parallel to the input of the logic circuit and the display device, and when the winding bobbin is fully wound, the output signal of the logic circuit operates an electromagnetic solenoid, etc. to wind the bobbin. This is a thread length management device for a multi-spindle automatic thread winding machine, which stops the machine and displays the order of full winding of the winding bobbin on a display device.

The counter mentioned above has a setting device that sets the target value all at once.
Moreover, it is automatically reset by the output signal of the thread travel detector.

Furthermore, by adding a time analysis circuit that measures and calculates the time difference between the first full winding of the winding bobbin and the last full winding of the winding bobbin, abnormalities in the thread winding machine can be monitored.

Examples thereof will be described below.

FIG. 1a is a diagram showing the configuration of an embodiment of the present invention in a four-axis interlocking automatic thread winding machine, and the broken lines indicate electrical connections.

FIG. 1 is a side view of a portion of FIG.

The drum 3 has a groove formed on its circumferential surface, and is brought into pressure contact with the bobbin 4, and as the drum rotates, the thread 5 is wound around the bobbin in a traversing manner.

The thread 5 goes from the tip 6 to the snell wire 7 and the tension device 8
, the thread 5 is wound onto the bobbin 4 via a roller 9 and a length measuring detector 10, and the length measuring detector 10 sends pulses corresponding to the running length of the thread 5 to a controller 11 as described with reference to FIG.
Add to.

The control device 11 displays the desired length measurement amount and the selection, and also excites the electromagnetic solenoid 12 with the output signal to operate the automatic doffing mechanism 13.

Therefore, the winding of the bobbin 4 is stopped, the bobbin 4 is finished with a fixed length of thread, the bobbin is replaced with an empty bobbin, and the winding operation is started again.

Although the automatic operation in this case is not directly related to the present invention and will be omitted, the bobbin is replaced without cutting the thread 5 when the thread is fully wound.

The control device 11 includes a counting device, an AND gate circuit, a display device, a power supply device, etc., which will be explained with reference to FIG.

FIG. 2 is a vertical front view a and a vertical side view showing an example of the length measurement detector 10. It is anodized to increase its hardness, and its cross section is shaped like an opening to reduce weight.

This rotating ring 14 is held on a shaft 15 with a ball bearing,
In addition, a small piece 16 of a permanent magnet is embedded in the side surface.

A detection coil 17 is disposed opposite the small piece 16 with a small gap therebetween, and a thread path is formed by guides 18 and 18 so that the thread 5 comes into contact with the circumferential surface of the rotating ring 14.

Therefore, when the thread 5 runs, the rotating wheel 14 rotates together with the thread, and the number of rotations is proportional to the running length.

Each time the magnet piece 16 passes in front of the detection coil 17, an electric pulse is sent out from the coil, this pulse is amplified and shaped by the amplifier 19, and is applied to the control device 11.

FIG. 3 is a diagram showing the configuration of the control device 11, in which length measurement detectors 10 corresponding to each of the four bobbins 4, 4, . . .
．． 10... output pulses are counted by the counters 20, 20... in the control device 11, respectively, and simultaneously applied to each of the travel detectors 21, 21... .

When the count value of the counter 20 reaches the value preset by the setter 22, a full wind signal is sent out and applied to the logic circuit 23 and the order display device 24.

The counter 20 is a presettable down counter made of a semiconductor IC circuit, and the setter 22 is of a known type that performs digital counting using thumbhole switches of several digits.

Further, the running detector 21 uses a Schmitt trigger circuit or the like to apply its output to the reset terminal of the counter 20 and an inverting circuit 25, and the output of the inverting circuit 25 is applied to the logic circuit 23 via an output.

Therefore, when a signal pulse is sent out from the length measurement detector 10,
Travel detector 21 generates an output to reset counter 20, which counts the number of input pulses as the yarn travels.

Moreover, when the operation of the length measuring detector 10 is stopped due to thread breakage, the inverting circuit 25 sends out an output, and this output is sent to the logic circuit 2.
Join 3.

Since the logic circuit 23 is composed of AND gates, 4
When all of the counters 20 send out full winding signals, the logic circuit sends an output to operate the electromagnetic solenoid 12.

Therefore, the automatic doffing mechanism 13 operates and the bobbins 4, 4...
... will be automatically replaced all at once.

Further, if one of the four spindles breaks, the length measuring detector 10 corresponding to that spindle stops, and the counting operation of the counter 20 is interrupted.

However, at the same time, the output of the running detector 21 disappears and the inverting circuit 25 sends out an output, so that when all the remaining counters send out full winding signals, the logic circuit 23 sends out an output.

In this case, as will be described later, the indicator 28 lights up to notify the thread breakage, so by repairing the weight where the thread breakage occurred, the weight will also return to normal operation.

As mentioned above, each spindle becomes full in turn, and when all are full, the bobbins are replaced at the same time, so naturally the bobbin that became full first and the bobbin that became full last. There is a slight difference in the winding length.

This is due to differences in thread tension, bobbin slippage, variations in thread count, etc., so by displaying the full winding order and making adjustments according to that order, deviations in the winding length can be reduced. can do.

That is, the display device 24 in FIG. 3 displays the order of full volumes, and the time analyzer 29 is for determining the time difference between the first and last full volumes, and its output is sent to a comparator 31 along with the output of a timer 30. In addition, the number of out-of-standard occurrences is counted by a memory-type abnormal value counter 32 and added to the display 28.

FIG. 4 is a diagram showing the detailed configuration of the display device 24 and time analysis device 29, and the four terminals 33□ to 334 receive full wind signals from each of the four counters 20 in FIG. join.

These signals are differentiated by a capacitor and sent to OR gate 3.
4, - 344 and the start logic circuit 35 and is applied directly to the reset logic circuit 36.

The outputs of the OR gates 341 to 344 are connected to the gate 37. through 374, display counters 38 and 374, respectively.
384, the gates 371 to 374 are closed by signals from terminals 33 and 334, respectively.

Therefore, for example, if full winding signals are applied to terminals 331, 332, . . . in this order, first terminal 33...
The counters all count 1'' by the signal , and at the same time the gate 37 closes.

Next, the counter 38 =/-3 by the signal at the terminal 332.
84 counts 2 and at the same time gate 3γ2 closes.

In this way, the counters 38 to 384 display a display as shown in the figure.

The time analyzer 29 is a device for managing the time difference between the occurrence of the first full spindle among the four spindles and the occurrence of the last full spindle, and includes a start logic circuit 35, a reset logic circuit 36,
Flip-flop circuit 39, gate 40, counter 4
1, a clock pulse generator 42, a setting device 43, etc.

Now, as mentioned above, when the full winding signal from the first full winding terminal 33 of the four spindles is applied to the input of the start logic circuit 35, an output signal is simultaneously generated and the flip-flop circuit 39 is set, so that the output signal The generator 40 opens and the counter 41 counts the pulses of the clock pulse generator 42.

Since the full scale of the counter 41 is set to a desired value by the setting device 43, when the counted value exceeds the set value, it sends out an output signal and adds this to the counter 32 mentioned above and operates the display 28. let

Moreover, when a full winding signal is applied to the last terminal 334, a signal is sent from the reset logic circuit 36 and the flip-flop circuit 39 is reset, so that the counting operation of the counter 41 is stopped and is reset by the output of the circuit 36. Ru.

Therefore, the counter 32 counts the number of times the time difference between the first and last full windings exceeds the setting value of the setting device 43, and displays this number.

In addition, the display counters 38 to 384 are connected to the traveling detector 2 described above.
Although it is automatically reset using the output No. 1, it can also be set manually using the switch 44.

In the above-described apparatus, if each weight takes the same time to reach full winding, the error in the winding yarn length of each weight is zero.

However, in reality, there are slight differences in the conditions of each machine, so errors occur in the winding yarn length.

This error is expressed by the time difference between the full winding display on the display counter 24. Therefore, the full winding time difference on the display counter 24 is converted into time within the range of the yarn length management target value, and the count value of the counter 41 is set by the setting device 43. .

At the beginning of operation of the bobbin winding machine, if the difference in full winding time on the display counter 24 is large compared to the set value on the counter 41 and the yarn length management target value is not satisfied, the display counters 381 to 384
The above-mentioned count value can be easily reduced by adjusting the weights that deviate from the center value of the full-volume arrival time according to the display order.

For example, the last weight to be fully wound each time is often due to excessive thread tension or slippage of the bobbin, so mechanical maintenance of these points can be performed to bring the time close to the full winding time of the center group and reduce the thread length error. do.

In addition, the counter 41
Since the output is sent out, the operating results of the thread winding machine can be read by the abnormal value counter 32.

As described above, according to the present invention, in a multi-spindle automatic sewing thread winding machine, the error in the finished thread length can be kept within 2 threads, and the amount of thread can be saved by more than 7 threads compared to the conventional sewing machine.

In addition, unmanned operation for a long period of time is possible, which has an extremely large economic effect, as well as a remarkable effect on labor saving and improving the quality of products.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a diagram showing the configuration of an embodiment of the present invention.
Figure 3 is a diagram showing the structure of the yarn length detection section in Figure 1.
4 is a diagram showing the electrical configuration of the control device in the figure, and FIG. 4 is a diagram showing the detailed configuration of a part of FIG. 3. In the figure, 1 is the prime mover, 2 is the transmission mechanism, 3 is the winding drum, 4 is the bobbin, 5 is the thread, 6 is the tip, 7 is the Snell wire, 8 is the tension device, 9 is the roller, and 10 is the length measurement detector. , 11 is a control device, 12 is a solenoid, 13 is an automatic doffing mechanism, 14 is a rotating wheel, 15 is a shaft, 16 is a magnet, 1
7 is a detection coil, 18 is a guide, 19 is an amplifier, 20 is a counter, 21 is a traveling detector, 22 is a setting device, 23 is a logic circuit, 24 is a sequence display device, 25 is an inversion circuit, 28 is a display device, 29 is a time analyzer, 30 is a timer, 31 is a comparator, and 32 is an abnormal value counter.

Claims (1)

[Claims] 1. A rotating wheel that rotates integrally with the running yarn in correspondence with each winding bobbin of an automatic thread winding machine having a plurality of winding shafts, and an electrical detection device that generates pulses as the rotating wheel rotates. A length measuring detector is provided, and the output pulse of the length measuring detector is applied in parallel to a counter set to the full yarn length of the winding bobbin and a yarn travel detector. Each output of the thread running detector is applied in parallel to the input section of the logic circuit and the display device, and when the winding bobbin is fully wound, the output signal of the logic circuit operates an electromagnetic solenoid, etc. to wind the bobbin. A yarn length management device for a multi-spindle automatic thread winding machine, characterized in that the machine is stopped and the order of full winding of the winding bobbin is displayed on the display device.