RU1784678C - Device for laying weft thread in loom - Google Patents

Description

1

(21) 4872672/12 (22) 05/14/90 (46) 12/30/92. Bull. Number 48

(71) Center for scientific and technical creativity of youth Pulse and the Leningrad Institute of Textile and Light Industry named after S.M. Kirova

(72) V.A. Gordeev, E.G. Poboroznyuk and A.V. Gusakov

(56) USSR copyright certificate Mg 1254671, class D 03 D 47/24, 1984. USSR copyright certificate Mg 1308656, class D 03 D 47/24, 1987.

(54) DEVICE FOR LAYING WEAR FITTINGS ON A FIRST WEAVING MACHINE

(57) Essence: the device allows to obtain both symmetrical and asymmetric in profile width multilayer fabric while maintaining strength indicators with stepless adjustment of the width of the multilayer fabric. 1 ill.

The invention relates to textile machinery and can be used on a rapier weaving machine in the production of multilayer fabrics with a profile that is variable in width.

A device is known for laying a weft yarn on a rapier weaving machine.

The disadvantage of this device is the inability to obtain tissue of variable width.

It is also known a device for laying a weft yarn on a rapier machine, having a gear rack with protrusions at the ends, a plate having longitudinal grooves for passing the protrusions of the gear rack and stops for restricting the movement of the gear rack, installed in the grooves to interact with the protrusions of the gear rack and connected with the programming device of the machine.

The most significant drawbacks of the known device for weaving a weft on a rapier weaving machine are: the inability to obtain a multilayer fabric symmetrical in width to the profile; the impossibility of a smooth change in the width of the produced fabric profile due to stepwise adjustment of the length of the weft thread introduced into the throat. The purpose of the invention is to increase usability and expand technological capabilities by providing a smooth change in the width of the produced profile of the fabric. To achieve this goal, the device for changing the length of the weft thread on the weaving machine for producing multilayer fabrics has a rapier spring loaded along its working path with a spring-loaded flexible cable for fastening to the aretback and connected to the reverse drive with a right and left thread screw for its ends to set movement limiters carriages with the possibility of connection with it and connected with the reversible drive of the last

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by means of the electric circuit of the machine, while the carriage moving drive is made in the form of a pair of drive drums placed along the working stroke of the carriages and an infinite element covering them with two stops on both branches interacting with the corresponding carriage.

The drawing shows the proposed device, General view.

An endless torso 2 is installed on the canopy 1 of the machine, the stops 5 are fixedly mounted on the upper 3 and lower 4 branches of which can interact with the stops of the rapier 6, interconnected by a tension spring 7 and mounted with the possibility of reciprocating movement along the guide 8 motionless mounted on the machine’s reed 1, on which the rapier 11 stops 10 are kinematically connected to the external driver via the electric motor 12 and can be moved along the lead screw 9.

The proposed device operates as follows.

The drive of the cable 2 mounted on the machine butt 1 is turned on. The drive reels of the cable begin to rotate and move the cable: the upper branch 3 from left to right, and the lower 4 from right to left. Along with the cable, the stops fixedly mounted on it also begin to move. Moving, the stops reach the stops of the rapier 6, abut against them and begin to move the rapiers 11 along the guide 8 towards each other through the throat. A shuttle with a weft thread is installed on one of the rapiers, which, moving together with the rapier, is routed through the throat. The rapiers travel through the pharynx until they abut against each other in the middle of the fabric. At the moment of rapier stop, the shuttle is transferred from one rapier to another and the stops are located, located on the upper 3 and lower 4 branches of the cable from the stops of rapier 6. After resetting from the stops, rapier 11 returns from the throat due to the tension spring 7, until contact with the stops 10 rapier 11, and the stops 5 continue to move along with the branches of the cable 3, 4, describe the full trajectory of their movement and reach the stops b, which are already in their original position based on the stops 10. The stops are installed on running 9, integral with the movable thereon. Moreover, the left and right parts have different directions of threading. For example, the left half is right, and the right is left. Thus, rotating the electric motor 12 by an amount specified by an external driver, the spindle 9, we reduce or open the stops 10, which increase or decrease

return rapier when exiting the pharynx. Having made the thread on the lead screw 9 with a fine pitch, for example, 1 mm, and discretely changing the angle of rotation of the lead screw 9 with a pitch, for example, through 15 °, we can adjust the width of the produced fabric through 0.042 mm. By changing the width of the fabric in this step, the profile of changing the width of the fabric will appear as a smooth line. Decrease or increase the return stroke

rapiers, reduce or increase the length of the weft thread laid in the throat and accordingly reduce or increase the width of the fabric produced symmetrically. To obtain an asymmetric profile

left or right it is enough to disable the left or right limiter. After the rapier returns to its original position, the bead is surfed with a machine tool laid in the throat of the weft thread. Stroke amount

Byrd is chosen in such a way that during

surf weft thread and fabric edge stops,

located on the cable have time to reach

the rapier stops and then the cycle repeats.

Thus, in comparison with the prototype, the claimed mechanism allows to obtain both symmetrical and asymmetric in profile width multilayer fabric while maintaining strength characteristics with stepless adjustment

the width of the multilayer fabric while simplifying the design.

Claims (1)

SUMMARY OF THE INVENTION yarns on a rapier weaving machine containing a pair of carriages installed in the guide pair with rapiers directed one to another, a drive for simultaneously moving the carriages towards one another carriage limiters along the rail, characterized in that, in order to increase usability and expand technological capabilities, by ensuring a smooth changes in the width of the produced fabric profile, it has a spring-mounted rapier placed along the working stroke - with its ends a flexible cable for securing the carriages and connected to the reversible a lead screw with right and left threads at its ends for installing carriage limiters that can be connected to it and connected to a reverse drive by means of an electrical circuit, while the carriage drive is made in the form of a pair of drive drums placed along the carriage travel and enclosing their infinite element with two stops on both branches x interacting with the corresponding carriage. / to