SU861992A1 - Pickup for measuring tension of threads and tape materials - Google Patents

Description

(54) SENSOR FOR MEASURING THREAD TENSION AND BELT MATERIALS

one

This invention relates to load measuring technique.

A known sensor for measuring the tension of a yarn, containing a system of thread guides consisting of three rollers, a bracket and a supporting rod, located with one of the outer rollers on the bracket, which is mounted on the axis of the middle roller with the possibility of turning around it, sensitive to an element associated with the middle roller; and a transducer for moving the sensitive element into an electrical signal tl 1.

The disadvantage of this sensor is its limited technological capabilities, since it is designed to measure the tension of monofilaments.

The closest in technical essence is a device for measuring the size of a magnetic tape.

containing guiding elements fixed in the housing, measuring system, conductor Ya1Kov, located between the guides and consisting of two rods, mounted symmetrically on the shaft, mounted rotatably in the housing, and tension converter t2l connected to the shaft.

those

However, it does not allow the capture of a moving belt and thread by a system of thread guides, and the design of the guides does not allow maintaining a constant angle of coverage of the thread guides of the measuring system, due to the gap between the guides, a greater thickness of the material being measured, which reduces the accuracy

20 measurements.

The aim of the invention is to expand the technical capabilities and improve accuracy.

3

This goal is achieved by introducing into the system of thread guides a two-arm lever connected with the housing and installed with the possibility of rotation relative to the shaft, located on both its shoulders in pairs and symmetrically supporting and threading rods that are placed outside the guide elements.

FIG. 1 shows the sensor. General view; in fig. 2 - the same, with the introduction of the thread in the throat of capture; in fig. 3 - the same, with the capture of the thread; in fig. 4 is the same when measured.

A sensor for measuring the tension of threads and tape materials comprises a housing 1, fixedly fastened on it, and guide lines 2 implemented in the form of rods, a measuring system of thread conductors consisting of two rods 3 fixed on shaft 4, a double-arm lever 5 and strengthened: on its arms there are two supporting rods b and two thread-conducting rods 7, a return spring 8, a clamp 9, an emphasis 10, a tension force transducer 1, a secondary device 12, a controlled filament (tape) 13.

The sensor works as follows. Before the measurement, a controlled filament (tape) 13 is inserted into the pickup zone between the guide rods 2, the measuring rods, 3, the supporting rods 6 and the thread-conducting rods 7 (Fig. 2).

The thread is gripped by moving the pair of guide rods 2 and pairs of measuring: rods 3 fixed on the body 1 by rotating the body 1 around the axis of rotation of the shaft 4. In this case, the supporting rods 6, which are located together with the wire seals 7, are pairwise and symmetrically on both arms of the lever 5, which freely rotates around the axis of the shaft 4, leaning on the controlled thread (tape), hold the lever on the bench until it is fixed by the latch 9. Moreover, the presence of a larger radius of rotation in relation to the gauge bubbled rods 3 allows relatively easy cocked wherein a return spring 8 (Fig. B), after the thread capturing sensor expands to the position measuring, while maintaining by a small additional inflection generated niteprovod conductive rod 9924

mi 7, a constant angle of coverage of the measuring rods 3 (Fig. 4). Measuring rods 3, coupled with opposite sides of the thread. (tapes) perceive the torque caused by the tension of the Slenta thread, which by means of a shaft 4 rigidly connected with them is transmitted to a tension tension converter P, generating a signal proportional to tension, which is fixed, for example, by the secondary device 12. After the measurement is completed, the clamp 9 releases the movable double-arm lever 5, which 5, together with the thread-conducting rods 7 fixed on it, is withdrawn by the return spring 8 up to the stop 10, freeing the thread from the gripping zone.

The sensor allows improving serviceability, increasing the accuracy and speed of measuring the tension of moving yarns (tapes) of a different range, as well as eliminating damage and breakage of the yarn (tape) during its capture.

The accuracy characteristics of the sensor do not depend on the assortment of the material being monitored (monofilament, multifilament yarn, tape material) and are mainly determined by the class of the tension-transducer, and the simplicity of refueling and measurement performance allowed for the on-line monitoring of the tension of materials in hard-to-reach 5 process equipment ,

Claims (2)

Invention Formula A sensor for measuring the tension of threads and tape materials, containing guiding elements mounted in the housing, a measuring system of thread conductors located between the guides and consisting of two rods fixed symmetrically on a shaft mounted to be turned in a housing, and a tension force transducer associated with the shaft, characterized in that, in order to expand technological capabilities and improve accuracy, A two-arm lever connected to the housing and installed with the possibility of rotation relative to the shaft, located on both its shoulders in pairs and symmetrically supporting the thread guide rods, which are placed outside the guide elements, is inserted into the system of thread conductors. Sources of information taken into account in the examination I. Copyright certificate of SSHZR for application No. 279416, cl. G 01 L 5/10, J3.07.79. 2. USSR author's certificate 517817, cl. G 01 L 5/10, 03.02.75 (prototype).