JPS5813644B2 - Send Kanchiki Kenteihouhou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is used in so-called constant fineness automatic reeling, which mechanically senses whether the raw silk yarn being reeled is suitable for the welding point and automatically performs cocoon feeding and welding. This article relates to a method for testing a fineness sensor, and its purpose is to accurately and easily test a fineness sensor.

Various types of fineness sensors have been proposed for use in constant-fiber automatic reeling, and improvements are still being made to this day. The goal is to accurately sense the fine-grained weld points.

Naturally, this fine limit fineness differs depending on the target fineness for reeling, and even in the fineness sensor, the fine limit fineness set depending on the target fineness for reeling varies.

For example, when using a newly manufactured sensor or reeling yarn with a target fineness different from the target fineness used so far, the fine limit fineness is set and adjusted for each sensor. It takes a considerable amount of time and effort to verify whether or not a set and adjusted sensor actually meets its fineness limit.

Another important task is to find out whether a sensor that has been continuously used is no longer able to maintain the set fineness due to deformation over time. This is what we are doing.

Naturally, in these tests, a sensor that is the standard for the test, in other words, a prototype sensor, is selected, and this prototype sensor is compared with the sensor that is the test object. This is what determines whether the exam passes or fails.

Therefore, determining the prototype sensing device required an extremely large amount of time and effort, and furthermore, considerable attention had to be paid to its deformation over time.

As a result of various studies, the present inventors have found that it is possible to perform the verification test of such a fineness sensor more accurately and more easily, especially for the fineness limit that has been set. During the process, the change in the diameter of the picked up yarn is detected as a change in the amount of electricity, and this is converted into a numerical value and recorded or displayed together with the record, and the sensing of the fineness sensor is also recorded, By reading both records together, it is possible to clearly determine whether or not the fineness sensor being tested maintains the set fineness limit, which has led to the present invention.

Now, an example of the implementation of the present invention will be described with reference to the drawings.
is a reeling thread, and as usual, the first drum wheel 2 and the second drum wheel 3
, the kennel 4 is formed, and the third one passes through the fineness sensor 5.
The drum wheel 6 is rolled up in contact with an eccentric roll 9 provided between the fourth drum wheel 7 and the fifth drum wheel 8, and wound onto a small frame (not shown).

The take-up yarn 1 is changed into paths a and b between the fourth drum wheel γ and the fifth drum wheel 8 by the rotation of the eccentric roll 9.

Reference numeral 10 denotes a yarn diameter detector, which is disposed at a position such that it faces the yarn diameter detector 10 when the take-up yarn 1 is located at position a.

Although the yarn diameter detector 10 has been described as being placed between the fourth drum wheel 7 and the eccentric roll 9, the present invention is not limited to this, and it may also be placed between the eccentric roll 9 and the fifth drum wheel 8. The thread diameter detector 1 may be located between the third drum wheel 6 and the fourth drum wheel 1.
It is desirable that the position is such that the insertion and withdrawal of the yarn 1 from the yarn 1 does not affect the fineness sensor.

Further, although the yarn diameter detector 10 is arranged on the path a, it is of course possible to arrange it on the path b, and the eccentric roll 9 may be rotated actively and rotated by contact with the yarn. It may be something that

Alternatively, instead of an eccentric roll, a normal roll may be moved back and forth, or the yarn 1 may be actively moved back and forth using a Snell wire or other suitable yarn guide.
The yarn 1 may be inserted into and removed from the yarn diameter detector 10 at regular intervals.

The yarn diameter detector 10 is composed of, for example, a light source 11 and a photoelectric element 12 that receives the light beam from the light source 11. When the yarn 1 is in the path b, the light beam of the light source 11 is incident on the entire surface of the photoelectric element 12, and When path a is reached, the shadow of the thread is photoelectric element 1.
2, the light rays from the light source 11 are reduced by that amount before entering the photoelectric element, so the output voltage from the photoelectric element depends on whether or not there is a thread between the light source 11 and the photoelectric element 12. Naturally, there will be a difference.

This output voltage is amplified by an amplifier 13 and applied to one input of a differential amplifier 14.

The output of the differential amplifier 14 is connected to an analog-to-digital converter 15 and also to an amplifier 16 having a high amplitude ratio.

The output of this high amplification factor amplifier 16 is coupled to a voltage holder 19 via a switch 17 and an integrator 18 .

Therefore, the state in which the thread 1 is not present in the detector 10,
That is, if the switch 17 is closed when in state b, the noise signal with no string signal charges the integrator 18 and adds the output of the voltage holder 19 to the other input of the differential amplifier 14. Then, the servo mechanism is operated to reduce the output to zero.

In addition, when the yarn 1 is present in the detector 10, that is, in the state a, the switch is opened, and if the sensor mechanism is removed, the output of the differential amplifier 14 is proportional to the yarn diameter or yarn volume. It appears as an electrical signal, and this electrical signal can be digitized by the analog-to-digital converter 15 and displayed on the fineness equivalent value display 20.

However, in the present invention, the fineness equivalent value display 20
What is displayed is for reference only, and the output from the analog-to-digital converter 15 described above is the gate circuit 21.
The data is entered into a numerical recorder 22 such as a printer via a printer and is recorded as a numerical value, but at this time, for example, the gate circuit 21 is controlled intermittently at desired time intervals by the output signal of a timer 23 whose time limit can be adjusted in 1-second increments. By opening it for a short time, the numerical value recorder 22 records a four-digit numerical value corresponding to the fineness of the reeled yarn at desired time intervals.

If desired, the digital signals that have passed through the gate circuit 21 are inputted into the arithmetic unit 24 to be sequentially added, and then the average value or variance over a certain period of time is calculated, and the numerical value recorder 2
2 may be held.

Furthermore, when recording in the numerical recorder 22, if the numerical value deviates from the set value, it passes through a comparator (not shown) that checks this, so that the color of the printing ink is changed or the recording is performed. It is even better if an appropriate symbol is recorded at the head or tail of the numerical value.

As described above, the present invention is characterized in that the numerical value corresponding to the fineness of the reeled yarn is recorded by a recorder, and the behavior of the fineness sensor is also recorded.

For example, let us take as an example a well-known fineness sensor, in which two disks facing each other with a certain gap are supported by a shaft, and a reeling yarn is passed through this gap to detect the fineness. To explain, two discs 25 and 25' are provided facing each other with a certain gap 26, and are connected to the shaft 27.
When the thread 1 is passed through the container frame 28 and reeled as shown in the figure, the sensor disks 2 5 , 2 5
' is a position where the sliding force of the traveling yarn and the rotational force by the vertical weight 29 are balanced, and reeling is continued.

If the fineness of the yarn during reeling becomes thinner and reaches a certain limit, the balance between the sliding friction force of the yarn and the vertical weight 29 will be lost, and the disc 2
5 and 25' rotate clockwise, the sensing limiting rod 30 protruding from the disk 25 also rotates and is stopped by the stopper 31.

An example of automatic reeling is to search for this displacement at regular intervals and start the automatic cocoon feeding and splicing device when the displacement is discovered.
In addition to its original role, the stopper 31 is also made to serve as an electrical contact, and in addition to its role as a stopper, the stopper 31 is made to also serve as another contact, and the discs 25 and 25' as the fineness sensor are When the rotation, that is, the sensing limiting rod 30 rotates and is stopped by the stopper 31, a circuit is closed, and this circuit may be connected to the numerical value recorder 22 described above.

The electrical contacts can be opened and closed using an electronic proximity switch that non-contactly detects an object that is displaced in conjunction with the rotation of the disk 25, for example, by optically detecting the displacement of the sensing and limiting rod 30. From a practical point of view, it is desirable to use a method that opens and closes a non-contact relay.

By doing this, when the reeling yarn 1 is being reeled, the yarn diameter detector 10 detects a change in the yarn diameter, and this is recorded in the numerical recorder 22 as a value equivalent to the fineness of, for example, 4 digits. be done.

In this case, the number of digits of the numerical value recorded is of course arbitrary, and the fineness equivalent value is the digitized value detected by the detector 10 and digitized by the analog-to-digital converter 15. It has been confirmed through numerous experiments that the following relational expression holds between the average value of the thread diameter and the thread diameter: thread diameter - AXM, where A: 2.52, M: 1.65, and X: the average value of the digit value This is because it was possible.

At this time, as described above, the timer 23 records on the recorder at one second intervals, so a four-digit number is printed on the recording paper of the recorder.

Changes in the yarn diameter of the yarn are detected by the yarn diameter detector 10, and this is recorded as, for example, a four-digit number in the numerical recorder 22, but as described above, the timer 23 records it at one-second intervals. Then, four-digit numbers are printed on the recording paper of the recorder at one-second intervals, and during this time, when the fineness sensor 5 acts, the following happens.

That is, when the fineness of the pick-up yarn becomes thinner and reaches a certain fineness, the disk 25, 25' rotates clockwise, and the sensing and limiting rod 30, which is also a contact point, rotates accordingly, and the sensing limiter rod 30, which is also another contact point, rotates accordingly. The contact is stopped with the stopper 31, and as a result, the electric circuit is closed, and an appropriate code is recorded on the recording paper of the recorder 22.

Therefore, both the numerical value sent from the thread diameter detector 10 and the code sent from the fineness sensor 5 are recorded on the recording paper.

The content of this record is, as already explained, that the numerical value is the value equivalent to the fineness, and the code means the fineness sensing point, that is, the fineness limit junction point of the fineness sensor, so the two are compared. By doing so, it is possible to clearly know in what condition the fineness sensor is sensing the fineness.

To further explain this point, when yarn is reeled using a fineness sensor with the fine limit fineness set as A denier, whether or not the yarn is reeled while maintaining the fine limit fineness A denier is a considerable amount. It is impossible to know the fineness of the yarn unless you collect it and test it.

In other words, even if the fineness sensor detects a decrease in fineness, the time at which it senses it is when it senses A denier, which is the set fine limit fineness, or when it senses B denier, which is another denier. It is not possible to know whether it is detected as a fineness limit.

Therefore, while the fineness sensor notifies you of the point in time when it is detected, if you know the fineness equivalent value at the time of the notification, the fineness equivalent value at that time can be regarded as the fineness limit, so both can be recorded. For example, it is possible to know the fineness limit at the time of sensing by the sensor.

Therefore, if the known fineness limit at the sensing point matches the set fineness limit, the sensor is known to be a proper sensor, and the set fineness limit is determined. If the fineness does not match, it can be determined that the sensor is inappropriate.

In this way, it is necessary to test whether a newly manufactured sensor or a sensor adjusted for use in reeling yarn with a target fineness different from the target fineness used up until now is a passed product. However, according to the present invention, the yarn reeling operation is carried out in the same way as ordinary automatic yarn reeling operation, and in the recorder obtained by this, or recording paper. In the above, it is possible to know the fineness point that the sensor is sensing by simply comparing and observing the detection symbol of the sensor and the detected value.

In this case, theoretically it would be possible to assert that the value at that time is the fine limit point with just one sensing symbol, but
If possible, it is best to make a comprehensive judgment based on several sensing symbols and their numerical values.

In addition, in the present invention, it is not possible to simultaneously test two or more reeling threads, so several threads are tested.
It is good to test with a machine dedicated to the test, but it is also okay to use the required number of automatic reeling machines, which are usually used for 400 threads and outside, for the test.

However, in this case, it is unavoidable that the reeling temperature, reeling speed, and other reeling conditions are restricted by other reeling cords.

Although the above explanation uses a light source and a photoelectric element as a detector, the present invention is not limited to this, and by running a thread between a pair of electrostatic electrodes, changes in capacitance can be handled. Alternatively, if the output of the photoelectric element is stable, the output of the amplifier can be directly sent to the analog-to-digital converter without moving the yarn into or out of the light source. It is also possible to add

As mentioned earlier, the electric signal from the detector is converted into a digital signal, which is input into a computer and added sequentially.The average value over a certain period of time is calculated and recorded on a numerical recorder. represents the center fineness of the yarn being reeled.

In addition, if only the numerical values that are marked with the code when the fineness sensor notifies the sensor are added sequentially, then the average value over a certain number of times or a certain period of time is calculated and recorded in the numerical record value. The value expresses the fineness of the fine-limited fineness junction of the sensor being tested.

Therefore, it is also possible to divide the sensors into groups according to fineness based on this value.

The verification method according to the present invention is not limited to the sensor described above, that is, a sensor commonly called a slit-type fineness sensor, but can be applied to any number of mechanical constant density sensors. It is possible to test.

In addition, when carrying out this test, it is necessary that the sensor to be tested is applied to the reeling yarn while reeling, but when the sensor detects a decrease in fineness, the cocoon feeding based on this is necessary. Cocooning does not have to be carried out mechanically, and cocoon feeding may be carried out manually.

[Brief explanation of the drawing]

The attached drawings are for explaining an example of the implementation of the present invention.
The figure is a side view of the main parts showing the state of reeling. Figures 2 and 3 are front and side views of the fineness sensor. Figure 4 is the electrical signal system when a light source and photoelectric element are used as a detector. It is a diagram.

Claims (1)

[Claims] 1. Yarn reeling is performed using a fineness sensor to be verified, and the change in the diameter of the taken up yarn at that time is detected as a change in the amount of electricity, which is converted into a numerical value and displayed as a fineness equivalent value in the record or together with the record. In addition, the method also records the sensing time of the fineness sensor, thereby verifying the fineness sensor based on the fineness equivalent value at the time when the sensing of the sensor is recorded.