FR2536093A1 - FRAME WIRE WINDING MECHANISM FOR MULTIPHASE MACHINING MACHINES - Google Patents

Abstract

A. WEFT WINDING MECHANISM FOR MULTI-PHASE WEAVING MACHINES. B. MECHANISM CHARACTERIZED IN THAT, ABOVE THE ROTATING TABLE ARE ARRANGED ELECTRO-MAGNETS 18, EACH OF WHICH IS PROVIDED WITH A PLATE 22 AND A COMPRESSION SPRING 21 TO PRESS THIS PLATE AGAINST THE FRONT OF THE COIL 2 OF THE WEFT INSERTION BODY 1, A GUIDE TUBE 24 BEING FURTHER PROVIDED FOR INTRODUCING THE END OF THE WEFT YARN 25 IN AN ANNULAR SPACE ON THE BOTTOM 15 OF THE COIL 2, ANCHORED IN A DIAPHRAGM 7, AND PROVIDED WITH SUCTION ORIFICES 8, THIS DIAPHRAGM 7 BEING FIXED IN THE CONTINUOUS OPENING 3 OF THE THREAD INSERTING BODY 1. C. THE INVENTION RELATES TO A WEFT WINDING WINDING MECHANISM.

Description

Weft winding mechanism for machines

multi-phase weaving machine ".

  The present invention relates to a

  yarn winding machine for weaving machines

  multiple phases, which consists of a rotary table

  tive with seats for filing for frame insertions,

  with coils for the measured weft thread length.

  Currently different types of mechanis-

  A known one of these known mechanisms comprises a winding head with a spindle adapted to receive the insertion spool of the spool. This winding head is provided with gripping members whose jaws guide the weft yarn from the feed reel to the spool of the weft insertion member The top cover of the spool head winding abuts against the weft insertion spool, thereby gripping the weft and displacing it by inversion and projection into a groove provided in the weft insertion spool,

  which makes possible its winding on this coil.

  The drive of the spindle is derived from a belt to

  high speed, by means of rollers of

  and is equipped with a brake, a clutch and a

  timing mechanism, which makes it possible to release

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  clutch engagement and brake engagement after a specific time interval, which corresponds to the number of

  required revolutions of the weft insertion coil.

  The winding mechanism further comprises adjusting members which make possible a complementary adjustment

  the necessary frame length.

  The disadvantage of the winding mechanism

  of this type lies in its relatively

  and the undesirable wear of some of the

  winding elements, such as, for example, coils

  insert, the hood of the head, the pick-up roller

  As a result of wear, it is difficult to maintain a constant accuracy of the length measurement of the weft yarn to be wound. Due to the large mass of the entire mechanism, its

  operation is extremely noisy.

  The mechanism mentioned above is usually provided with an electromagnetic clutch and a brake, which compensate for certain disadvantages of the mechanical assembly, but which then pose the problem

  the poor reliability of operation of certain

electrical devices.

  In some mechanisms, we use a

  winding by means of a flail which also diminishes

  part of the disadvantages encountered in the use of

  the winding head cover, however,

  removal of the weft reel from the winding head becomes more complicated and it requires that the

  flail is always directed in the same direction.

  Another winding mechanism is equal.

  It is well known in which the weft is blown by a stream of air into the blast receiving chamber of the weft insertion member. The disadvantage of this arrangement lies in an uncontrolled deposition of

  frame in the blowing chamber, which causes a dis-

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  irregular tribution of the weft along the entire length of the crowd In addition, the air supply

  compressed mechanism and machine-is very disadvantageous

  saddle. The disadvantages mentioned are avoided by the winding mechanism according to the present invention which is characterized in that above the rotary table are arranged electromagnets, of which

  each is provided with a tray and a compressor spring

  to press this plate against the front of the weft insertion member coil, a guide tube being further provided for introducing the end of the wire

  weft in an annular space on the bottom of the bobbin

  ne, a suction nozzle, connected to a source of depression

  the coil being provided at its bottom with a set of radial orifices, and a narrow-blade type turbine being arranged near the bottom, driven in rotation, in common with the coil on a pin, anchored in a diaphragm, and provided with suction ports, this diaphragm being fixed in the continuous opening of the wire insertion member. The advantages of the winding mechanism

  according to the invention resides in its conception

  very simple, a low level of noise thanks to slow-moving masses and safe operation.

  gives the possibility of a reliable winding of a lon-

  exactly defined frame wire.

  The accompanying drawings show embodiments of the winding mechanism according to the invention, in which: FIG. 1 is a view in axial section through a winding mechanism according to a first

exemplary embodiment.

  FIG. 2 is a similar view of a

second embodiment.

  FIG. 3 is a similar view of a

third embodiment.

  The winding mechanism for multi-phase weaving machines comprises for example a rotary table, not shown, which is provided with

  seats (not shown) for the deposit of

  weft assembly 1 (Figure 1) Each of these members is provided with a coil 2 which is mounted for free rotation in its continuous opening 3 The coil 2 rests, with its hub 4 in bearings 5 which are mounted on a spindle 6 which is attached to the diaphragm 7 which is provided with a set of suction ports 8 The diaphragm 7 is fixed, by means of a ring 9 and screws (not shown) by

  via an elastic washer 10, in the box

  It is provided in the continuous opening 3 The coil 2 is provided with a circumferential groove 12, a side wall 13 is extended and is engaged between the

  diaphragm 7 and the stop shoulder 14 provided in the

  Continuous vein 3 The bottom 15 of the circumferential groove

  12 is provided with a set of radial orifices 16 which open into the space between the bottom 15 of the groove 12 and the hub 4 of the spool 2 In this space

  is arranged a set of blades which constitutes a tur-

narrow blade 17.

  In the rotary table, not shown, is mounted in each of its seats, an electromagnet

  18 with winding 19, adjustable in height The electro-

  magnet 18 is provided, in its axis, with a housing 20, in which is anchored a compression spring 21 On the opposite end of the spring 21, is mounted a plate 22, which bears against the front of the coil 2, thus covering the entire surface of the

narrow blade turbine 17.

  In front of the electromagnet 18, is mounted

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  a suction nozzle 23 which is connected to a source of

  depression (not shown) and which is adjustable in

  In front of the circumferential groove 12 of the coil 2, a housing is provided in the weft insertion 1, in which the guide tube 24 is engaged for the weft thread 25. This guide tube 24 extends as far as the annular space 26 surrounding the coil 2 which is connected around the electromagnet 18, with

  the surrounding space by an annular opening 27.

  The arrangement of the winding mechanism shown in Figure 2 is basically the same as that of the mechanism shown in Figure 1 In this example, the pin 6 passes through the hub 4 of the coil 2 and is provided with one end spherical

  for its contact with the elastic stop 28, which is

  on the central appendix 29 of the electromagnet 18.

  Around this central appendage 29 is placed a spring

  compression 21, which leans against an annular appendix

  30, adapted for this support, the tray 22 of form

  ring, which in Figure 2 leans against the

  The plate 22, in this case, has a circumference bent in a top direction and is provided with circumferential appendages 31 which engage in guide projections 32 protruding on the circumference of the electromagnet. magnet 18 The opening

  ring 27 around the electromagnet 18 prolongs the

  annular space 26 around the coil 2 of the guide tube

24 for the weft thread 25.

  The winding mechanism shown in FIG. 3 is based on the same principle. The coil 2 is, in this example, provided with a bottom directed towards

  the hub 4 The annular space 26 in which is introduced

  The guide tube 24 is disposed between the bottom 15 and the hub 4 of the spool 2. The narrow blade type turbine 17 is disposed on the circumferential side.

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  The latter is limited so as not to exceed the outer surface of the weft insertion member 1 by a stop shoulder 14 which is engaged with the turbine 17. The electromagnet 18 is provided with a central opening 33 through which passes, the guide tube 24 and which forms, on one hand, a channel for the air sucked by the turbine 17 This central opening 33

  is provided, from the side of the spool 2, with a sponge.

  ring 34, on which the spring of

  compression 21, supported by one end against a

  Annular wise 30 provided on the annular plate 22.

  The winding mechanism according to the present invention operates in the following manner. The weft insertion member 1, after passing through the shed of a multi-phase weaving machine, in which the weft yarn has unrolled from its spool 2, is deposited in a non

  of the rotary table From the upper

  the electromagnet 18 is approached to the coil 2 by means of a mechanism not shown and by suction from the bottom of the suction injector 23 Simultaneously, the guide tube 24 with the weft thread 25, of which a supply reserve is advantageously wound on a transverse winding reel, not shown, penetrates into the annular space 26 of the spool 2 By means of the suction nozzle 23, the spool 2 of the insertion member frame 1 and tray 22 are moved

  upward under the effect of depression This depression

  sion acts simultaneously on the weft thread 25 through suction holes 8 provided in the diaphragm 7, the turbine 17 and radial orifices 16 provided in the

bottom 15 of the coil 2.

  Under the influence of this depression, the former

  the end of the weft thread 25 is moved out of the guide tube 24, over a defined length corresponding to the need and determined by a mechanism not shown. The depression acting on the plate 22 has the effect of pressing it against the spool 2, which ensures its

  initial position before winding The effect of

  The pressure is further increased by the action of the compression spring 21. At a certain time, a feeler (not shown)

  sends a signal for the electronic control device

  than the electromagnet 18, so that it attracts the plate 22, against the action of the compression spring

  21 Thus, the brake is released, and simultaneously, the

  air flow to the turbine 17 is open, which starts its rotational movement caused by the air flow.

  the weft yarn is wound on the spool 2.

  During this winding, the diaphragm 7 is bent by the force thus caused, and, consequently, the coil 2 is displaced with its side wall 13 in a position shown in FIGS. 1 and 2, or the turbine part 17, in the example of Figure 3, is separated from the stop shoulder 14 Thus, the coil 2 has its brake completely released and the winding

  with a minimum of passive resistance,

  only the deposit of the wire on it.

  After a certain time, or a certain number of revolutions of the coil 2, the supply of energy to the winding 19 of the electromagnet 18 is interrupted, the plate 22 is pushed back by the compression spring 21 and the depression against coil 2, which is

thus shut down.

  After the weft yarn 25 has been wound in the length necessary for a width of

  fabric, the insertion member 1 with the spool 2 are pre-

  trimmed for insertion into the crowd of the weaving machine. The invention can be used for the winding of weft yarn in insertion members of

  weft of multi-phase weaving machines.

RE VE N D I CA T I O N

  Weft winding mechanism for multi-phase weaving machines, consisting of

  a rotary table provided with seats for depositing orga-

  Weft insertion wefts with bobbins for a measured length of weft yarn, a mechanism characterized in that

  above the rotary table are arranged

  magnets (18), each of which is provided with a plate (22)

  and a compression spring (21) for pressing this plate

  against the front of the coil (2) of the

  weft fraction (1), a guide tube (24) being further provided for introducing the end of the weft thread (25) into an annular space on the bottom (15) of the spool (2), a nozzle of suction nozzle (23), connected to a vacuum source, being arranged below the rotary table, the coil (2) being provided, in its

  bottom (15) of a set of radial orifices (16), and a turbo

  narrow-blade type (17) being disposed near the

  bottom (15), driven in rotation, in common with the bobbin

  ne (2) on a pin (6), anchored in a diaphragm (7), and provided with suction ports (8), this diaphragm (7)

  being fixed in the continuous opening (3) of the

sertion of wire (1) -