SU1684590A1 - Device for measuring yarn length on warping machines - Google Patents

Abstract

The invention relates to measuring instruments and can be used on textile machines. The aim of the invention is to improve the measurement accuracy. The device consists of a disk with a label attached to the roller, on both sides of which thread guides are installed. The thread guides and the roller, additionally equipped with a brake, are made to move in a vertical plane. The roller brake is connected with the input to the pedal switch pedal position sensor of the drive, which improves the accuracy of measuring the length of the threads in the transient modes of operation of the textile machine. 2 Il.

Description

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This invention relates to measuring instruments and can be used on textile machines.

The purpose of the invention is to improve the measurement accuracy.

Fig. 1 is a flow chart of the threading into the device; figure 2 - structural diagram of the device.

The device comprises a single-label disk 1 mounted on a roller 2 rotating on bearings mounted on an axis 3 having a vertical movement adjustment, thread guides 4 having a vertical adjustment for imparting the angle of coverage of the rollers with threads, a nitrating comb 5, evenly placing the threads on the roller and preventing them from tangling, an adjustable electromagnetic brake b of the roller 2 and a pedal switch actuator position sensor 7 connected to the brake

warping cam, adjustable cam 8 mounted on the pedal and interacting with sensor 7. The device also includes a reading element 9, a pulse shaper made in the form of an anti-breezing unit 10, a block 11 of counters, an indicator 12 for visual observation of the length of the threads, block 1 -3 comparisons, filament length indicator 14, electronic key 15, drive and brake control unit 16 of the warping roller and counter reset element 17. The output of the reading element 9 is connected to the input of the anti-bounce block 10, the output of which is connected to the input of the block 11 of counters. The output of the block 11 is connected to the input of the comparison block 13, to the other input of which the unit 14 of the length of the threads is connected. The output of the comparator unit 13 is connected to the input of the electronic switch 15, the output of which is connected to the input of the control unit 16. The output of the block 11 counters soOO 00 00 SL SL YO

It is connected to the input of the indicator 12. A counter reset element 17, made in the form of a button, is connected to the input of the block 11 of the counters and the control input of the electronic key 15.

The roller 2 with the axis 3, thread on the rulers 4, comb 5, brake b in the direction of movement of the threads are placed on the machine up to the comb thread stacker, in the direction along the width of the fan of the threads so that it provides refilling of the threads of one extreme vertical row of the spooler (Fig .one). The axis 3 of the roller 2 is parallel to the axis of the warping roller,

The device works as follows.

Before starting the measurement of the length of the threads by pressing the button 17, the readings of the block 11 of the counters are reset to O and the electronic key 15 is opened at the same time, which makes it possible to start the warp drive. The unit 14 of the length of the threads produces a set of the numerical value of the required length of the threads on the warp roller. At the moment of pressing the pedal of the warp drive actuator, which is at the same time in the extreme upper position, the cam 8, interacting with the pedal position sensor 7, opens (closes) its normally closed (normally open) contacts, which ensures the shutdown of the electromagnetic brake 6 of the roller 2 Upon further downward movement of the pedal, the warp roll is braked and its drive is activated. Due to the fact that the moment of McRole of the resistance to rotation of the roller is determined by the dependence

M., Mr. Orol.

sopr.rol. gtr.niti -2- p

where Pt.niti is the strength of the friction of a roller of a single thread, determined by the type of fiber of the thread and its angle of coverage of the roller by means of adjustable thread guides 4 (figure 1);

Orol. - diameter of the roller;

n is the number of threads in one extreme row of the spool of the wire contacting the roller; the roller begins to rotate simultaneously with the warp roller. In this case, the pulses excited by the label of the disk 1 in the reading element 9, through the anti-drift block 10, stabilizing their shape and size, arrive at the input of the block 11 of the counters. From the output of block 11, the signals in the binary code bidet arrive at block 13 of the equation, and from the other output - to the input of indicator 12. Codes entered into indicator 12 are converted and output as visual digital information with a reading resolution of 1 m. on 1 m occurs only after the excitation in the reading element of nine ten pulses, which corresponds to

ten revolutions of roller 2.

Comparison unit 13 compares the code received from the block of 11 counters with the setpoint device code 14. When the warping roller has been used up, the codes of the block 11

counters and knob 14 are equalized, and the equality signal locks the electronic key 15 and the control unit 16 turns off the warp drive and activates its brake.

When the warp roller is activated, the pedal of its drive, which has previously been fixed in the lower position, starts to move upwards under the action of the spring and takes up the extreme upper position only after the brakes of the warp roller act. In the extreme upper position of the pedal, the cam 8. interacting with the sensor 7 closes (opens) its contacts, which ensures

switching on electromagnetic brake 6 of roller 2. At the same time, due to the fact that the braking torque applied to the roller and adjustable in magnitude is less than its torque resistance, i.e.

....., t-Orol.

Mtorm.rol. Msoprol.rol. gtr.niti -2- p

the roller continues to rotate with decreasing frequency, the pulses from the disk mark continue to flow into the device circuit and

measurement of the length of the threads is made up to the complete stop of the warp roll.

The simultaneous stopping of the roller with the warping roller is ensured by a decrease in the speed of rotation of the warping roller, by the action of MTOR. and Msr.rol.

The need to measure the length of the threads after the start of braking of the warp roller is justified by the presence of rotational inertia due to slippage in the brake system of the warp roller, and the unacceptability of the instantaneous stop of the warp roller for technical reasons, since

the upper layers of threads are rubbed by the presser roller of the machine. For these reasons, for example, after the beginning of the braking of the warping roller, which wound the thread at a speed of 350 m / min, from 8 to 12 m of threads going through the roller 2 continue to wind on it.

If the warp yarn 8 is broken, in accordance with the operation of the machine’s electrical circuit, the warp drive drive stops and brakes. In this case, the pedal lift and the operation of the pedal position sensor 7, the continuation of the measurement of the length of the threads, up to the complete stop of the warp roll, is completely identical to the above.

The device is put into operation after replacing the accumulated warping roller with an empty one by pressing button 17 and then starting the warp roller with the pedal.

If it is necessary to change the value of the specified length of the threads, the required value is dialed at the setting device 14 before the device is started up.

In the event of an emergency or necessary shutdown of the device, the block 11 of the counters is provided with a memory, whereby information about the length of the threads accumulated on the warping roller is saved.

Claims (1)

Invention Formula Device for measuring the length of threads on warmers, containing measuring roller, equipped with a disk with a label that interacts with the reading element, unit length of the threads, comparison unit, electronic key, pulse shaper, block counters, indicator Fig. { and a drive and brake control unit, the control input of which is connected to a footswitch, characterized in that, in order to increase the accuracy measurement, it additionally has an element for resetting the counters, an adjustable electromagnetic brake of the measuring roller, an electrical input connected to the pedal switch pedal position sensor, and the measuring roller is installed with the possibility of covering it with the threads of an extreme vertical row of spool of the warping machine and has on both sides thread guides, each of which and the measuring roller are made to move in a vertical plane, while the output of the reading element is connected through the driver with the information The output input of the counter unit, the first output of which is connected to the indicator, and the second output, to the first input of the comparator unit, the second input of which is connected to the setter of the thread length, and the output, via an electronic key, to the input of the drive control unit and the warp brake , and the installed inputs of the meter block and electronic key are connected to the output of the counter reset element. Schi 2