RU64637U1 - ELECTRIC TENZOMETRIC DEVICE FOR MEASURING THE TENSION OF A BASIC THREAD ON A WEAVING MACHINE - Google Patents

Abstract

The utility model relates to textile machinery and can be used in weaving to measure the tension of individual warp threads by the depth of dressing in hems for looms of the type STB, ATPR, etc., while developing a wide range of fabrics.

The utility model allows to increase the reliability and accuracy of measuring the tension of a single main thread in the refueling of the loom along its width and simplify its design.

To do this, in an electrotensometric device for measuring the tension of a single main thread on a weaving machine, containing a cantilever jar in the form of a bar of equal resistance with strain gauges glued on it and a thread winding device, a horizontal plate rigidly connected to the cantilever beam, the horizontal plate is rectangular in shape it has a rectangular through hole with sides parallel to the sides of the plate, on two opposite sides of the horizontal plate in one direction from the console ravine and at right angles to the plane of the guide plates are formed,

the device for winding the thread into the device is made in the form of a hook mounted on the end of the cantilever jar from its lower side with the possibility of regulating its movement vertically and around the longitudinal axis. 1 ill.

Description

The utility model relates to textile machinery and can be used in weaving to measure the tension of individual warp threads by the depth of dressing in hems for looms of the type STB, ATPR, etc., while developing a wide range of fabrics.

Known electrotensometric device for measuring the tension of a group of threads [1], containing an elastic U-shaped plate bracket glued to it with strain gauges, a lower metal bracket for gripping and hanging under the U-shaped bracket in its middle group of threads. The device is placed on the surface of the warp threads, relying on the edges of an elastic U-shaped bracket, bent at a right angle. Under the action of the tension of the warp threads, an elastic deformation of the U-shaped bracket occurs, the signal from which is sensed using strain gauges and recorded by an oscilloscope to obtain an indication of the tension of the group of threads.

The disadvantages of the device are low accuracy and reliability of measurement due to unstable contact of the U-shaped bracket and threads and difficulties

threading from individual heaps into the lower metal bracket and placing them on a U-shaped bracket.

The prototype is an electrotensometric device for measuring the tension of a single thread [2], containing a plate with two eyes for threading, a cantilever beam fixed in it in the form of a bar of equal resistance with strain gauges glued on it and a thread winding device in the form of an eye at the end of the beam.

The disadvantages of the prototype are the low reliability and accuracy of measuring the tension of a single warp on a weaving machine due to the complexity of the design and the need to violate the integrity of the thread when refueling in the device, the inability to move the device along the width of the thread without destroying the thread, due to the low control of the angle of bending between the eyes for different strained individual warp threads.

The technical result of the claimed utility model is to increase the reliability and accuracy of measuring the tension of a single main thread in the refueling of a loom along its width and simplifying its design.

This result is achieved by the fact that in the electrotensometric device for measuring the tension of a single main thread on a weaving machine containing a cantilever beam in the form of a bar of equal resistance with strain gauges glued on it and a device for winding the thread, a horizontal plate rigidly connected to the cantilever beam, according to

utility model, the horizontal plate is rectangular in shape, it has a rectangular through hole with sides parallel to the sides of the plate, on two opposite sides of the horizontal plate in the same direction as the cantilever beam and guides are made at right angles to the plane of the plate, a device for threading the thread into the device made in the form of a hook mounted on the end of the cantilever beam from its lower side with the possibility of regulating its movement vertically and around the food noy axis.

The technical result is achieved as follows: threading the thread into the device does not destroy its integrity due to the fact that the device for winding is made in the form of a hook, adjusting the movement of the hook vertically and around the longitudinal axis allows you to more reliably grab and hold the thread in the device for threading, which improves the accuracy and reliability of measuring the tension of a single main thread; by making a rectangular hole in the horizontal plate, the convenience of selecting a single warp thread from a weaving loom is improved, which allows you to control the angle of bending of the thread and improve the reliability of measuring the tension of a single thread. By installing guides on two opposite sides of the horizontal plate in the same direction as the cantilever beam and at right angles to the plane of the horizontal plate, it allows you to move the device along the threads without distortion and ensure stability

the location of the device on the warp threads, not allowing the device to move across the warp threads, which also increases the reliability and accuracy of measuring the tension of the thread while simplifying the design of the device.

Figure 1-a shows a diagram of the device, figure 1-6 is a device in section along aa.

The device comprises a horizontal plate 1 with a rectangular through hole 2 made in it with sides parallel to the sides of the horizontal plate 1, a cantilever beam 3 in the form of a bar of equal resistance with strain gauges glued on it 4, guides 5 mounted on two opposite sides of the horizontal plate in the same direction as cantilever beam and at right angles to the plane of the plate, mounted on the end of the cantilever beam from its lower side with the ability to control movement along vertically potassium and around the longitudinal axis of the device for winding the thread 6, made in the form of a hook for gripping and holding the thread 7.

The device operates as follows. On the loom in the process of its work in the dressing, a thread is selected for which it is necessary to determine the nature of the change in tension. The device is installed on the refueling surface of the main threads using guides 5 made at right angles to the plane of the horizontal plate 1, placing them in the same direction with the cantilever beam 3 and warp threads, selected separately

the main thread 7 using the device for winding the thread in the form of a hook 6 is captured through a rectangular hole in the plate, positioning without skew in the device. At the same time, the location of the hook is adjusted vertically and around the longitudinal axis to ensure greater grip reliability and measurement accuracy. As a result of the formation of the bending angle of the main thread when it passes through the hook 6, the resultant force K acts on the cantilever beam 3, which deforms the cantilever beam 3 and the strain gauges 4 attached to it, transmitting a signal to the strain gauge installation to process and obtain an indication of the tension of the main thread.

The proposed device is notable for its ease of use, the measurement of the tension of an individual main thread in a dressing can be performed without the use of special fasteners, the degree of influence of the mass of the device on the thread tension is negligible, not distorting the measurement result, which increases the accuracy and reliability of measuring the thread tension.

Sources of information taken into account

1. Basics of designing textile machines. Under the general ed. Doctor of Technical Sciences, prof. A.I. Makarova. M: "Engineering", 1976. - S. 416.

2. Korytyssky Y.I. and others. Complex mechanical studies of the pneumatic machine P-105 company Kovo. M: TSNIITE Legprom, series III, information 1, 1966. - P.6.

Claims (1)

An electrotensometric device for measuring the tension of an individual warp on a weaving machine, comprising a cantilever beam in the form of a bar of equal resistance with strain gauges glued on it and a device for winding the thread, a horizontal plate rigidly connected to the cantilever beam, characterized in that the horizontal plate is rectangular in shape, it has a rectangular through hole with sides parallel to the sides of the horizontal plate along two opposite edges of the plate Guides are made in one direction with the cantilever beam and at right angles to the plate plane, the thread winding device is made in the form of a hook mounted on the end of the cantilever beam from its lower side with the possibility of regulating its movement vertically and around the longitudinal axis.