RU2338017C1 - Warp let-off motion on weaving loom - Google Patents

Abstract

FIELD: textile industry, paper industry.

SUBSTANCE: invention relates to textile engineering and can be used in weaving looms. The mechanism has two disks, kinematically connected with a weaver beam, in return a beam shaft is built up of two parts, connected by inner surface of a splined bush. Splines are placed on the external surfaces, and narrow gear-wheel and one of a brake disk are placed on the splines. The narrow gear-wheel is connected through an axial bearing with a tapped wheel, which is placed on the second part of the built-up shaft, and it interlocks with a broad gear-wheel, which is firmly fixed on one shaft with a worm wheel and rotated by the worm fixed on the shaft of weaving loom.

EFFECT: accuracy enhancement of beam thread's release during fabric production.

2 dwg

Description

The invention relates to textile machinery, can be used on looms to equalize the tension of the warp during the operation of the loom and reduce their breakage.

Known brake of a Navoi loom, containing a brake disc, rigidly mounted on one shaft with a weaving pile, which covers the brake band, pressed against it under the action of a spring [1].

A significant disadvantage of the known brake is that the magnitude of the tension of the base is regulated by changing the tightening of the spring and this mechanism requires recharging the spring.

A device is known for a loom for supplying warp yarns to a fabric forming zone under the influence of its own tension on warp yarns, comprising a web with a gear, which engages with a gear associated with the brake disc. On the sides of the disc there are brake pads adjoining it, connected to a spring, which in the process of weaving in a controlled manner compresses the pads to the disc, providing tension to the base unwound [2].

A significant disadvantage of this device is the reduced stiffness of the transmission of braking torque, due to the possibility of inertial slippage of the weaving navoi due to its large mass.

A brake is adopted as a prototype, comprising a brake means adjacent under the action of springs to the brake plate, made in the form of two bevel gears, by means of a spline connection associated with two brake discs, while the bevel gears mesh with a bevel gear, which is kinematically connected to the weaving in bulk [3].

A significant drawback of this brake is that the nava rotates only in the direction of winding the base, and compensation of the base tension does not occur.

The technical result is to increase the accuracy of tempering of warp threads in the manufacturing process of fabric.

The specified technical result is achieved by the fact that in the device for tempering and tensioning the warp on a weaving machine, comprising a brake means mounted on a web shaft and including two disks kinematically connected with a weaving web, according to the invention, the web shaft is made of prefabricated, consisting of two parts connected the inner surface of the spline sleeve, the splines being located on its outer surface and a narrow gear and one of the brake discs mounted on them, the narrow gear through the thrust bearing with yazana as a threaded wheel mounted on the second part of the collecting shaft and a worm gear pair through the wide.

The technical result, which consists in increasing the accuracy of tempering the warp threads during the production of fabrics, is achieved due to the possibility of turning the weaving navoi in the opposite direction after the tempering, which is necessary to equalize the tension of the warp threads at the moment of inertial movement of the navoi, due to its large mass, this allows to increase the quality of the produced tissue (to avoid the appearance of defects such as “duck banding” and “starting strips”).

The invention is illustrated by drawings, where figure 1 shows the kinematic diagram of the device and figure 2 shows the design of the probe to control the radius of the winding of the main yarn on a weaving.

The weaving bulk 1 (Fig. 1) is connected through a pin 2 to a prefabricated bulk shaft 3, consisting of two halves, which are freely located in the round grooves of the spline sleeve 4 with splines 5. The first disk 6 with friction pads is rigidly mounted on the left half of the prefabricated shaft 3 7. On the splines of the spline sleeve 4 are located the second disk 8 with friction linings 9 and a narrow gear 10, which is adjacent to the thrust bearing 11 in contact with the threaded wheel 12, having an opening with a rectangular thread 13, inside which the threaded part can rotate 14 of the right half of the collection shaft 3. Between the narrow gear 10 and the disk 8, springs 15 are located, by means of which the friction linings 9 of the disk 8 are pressed against the friction linings 7 of the disk 6. The narrow gear 10 is engaged with the wide gear 16, which is firmly connected to the roller 17, rigidly connected to the worm wheel 18, receiving rotation from the worm 19, mounted on the shaft of the loom. The prefabricated shaft 3 (figure 2) can be rotated in bearings 20, mounted in the bracket 21 of the loom. The lever of the probe 22, with which the spring 23 interacts, is attached to the right half of the shaft 3 by means of a rigid connection. The right half of the collection shaft 3 is made integrally with the flange 24, which is included in the annular groove of the bracket 25.

The device operates as follows. The rotational movement of the loom shaft is transmitted to the worm 19, and from there to the worm wheel 18. Due to the fact that the wide gear 16 is firmly connected to the worm shaft 17, it transmits the rotational movement to the narrow gear 10. The approach direction of the worm 19 must be selected so that the narrow gear 10 rotated in the opposite direction of rotation when unwinding the weaving. Through the spline sleeve 4, the rotation is transmitted to the disk 8, and through the friction linings 9 and 7, the rotational movement will be transmitted to the disk 6, which will tend to turn the weaving bulk 1 in the opposite direction until the filling tension is created, after which the bulk will stop, since the friction linings 7 and 9 will begin to slip relative to each other due to the flexible connection between the disks 6 and 8. In this case, the spline sleeve 4 will rotate around the collecting shaft 3. In the process of fabric formation, due to the operation of the commodity regulator, anizmov shedding and surf the weft thread to the fabric edge of the warp tension increases, and the torque generated by the warp beams 1, exceeds the torque generated by the narrow gear 10, which will allow textile navoyu 1 to turn around and make a vacation base. If during the warping of the warp, the tension of the main threads drops below the refueling, which is quite possible as a result of the inertial movement of the beam, then in this case the torque created by the narrow gear 10 will be more than the torque produced by the weaving fabric 1, and the latter will be forced to rotate in the opposite direction. Thus, the tension of the base will be leveled to the filling.

During the operation of the loom, the diameter of the winding of the weaving of the Navoi changes, while the lever of the probe 22 under the action of the spring 23 will move down, as a result of which the right half of the collection shaft 3 will rotate. Since this part of the shaft has a threaded connection with the wheel 12, then turning inside the threaded wheels 12, the roller will not be able to translate along the thread due to the fact that the flange 24 of the right half of the shaft 3 is located in the annular groove 24 of the bracket 25. Therefore, when it is rotated, the wheel 12 will post motion movement. The direction of the thread on the right half of the shaft 3 should be selected so that when it is turned from the probe, the wheel 12 is shifted in the opposite direction from the narrow gear 10. As a result of the spring 15, the narrow gear 10 is shifted and it will be shifted along the teeth of the wide gear 16. the springs 15 will weaken their effect on the disk 8, as a result, the braking torque will decrease, which will enable the weaving pile 1 to rotate a larger angle.

Information sources

1. Gordeev V.A., Volkov P.V. Weaving. - M .: Light and food industry, 1984, 485 p., S. 367.

2. US patent No. 4485849, MKI3 D03D 49/08, 1984

3. RF patent №2217532, IPC D03D 49/08, 2003

Claims (1)

A device for tempering and tensioning the warp on a loom, comprising a brake means mounted on a web shaft and including two disks kinematically connected with a weaving web, characterized in that the web shaft is prefabricated, consisting of two parts connected by the inner surface of the splined sleeve, splines which are located on its outer surface and a narrow gear and one of the brake discs are installed on them, and the narrow gear through the thrust bearing is connected as with a threaded wheel mounted on the second parts of the prefabricated shaft, and with a worm pair through a wide gear.

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