FR2458612A1 - DEVICE FOR THE CONTROL OF LOWS IN A CIRCULAR WEAVING MACHINE FOR MANUFACTURING GAS TISSUE - Google Patents

Abstract

DEVICE FOR CONTROLLING THE RODS OF A CIRCULAR WEAVING Loom FOR THE MANUFACTURE OF GAUZE-ARMOR FABRICS. THE INTERNAL 1 AND EXTERNAL 2 RODS ENSURING THE FORMATION OF THE STEP ARE MOBILE AXIALLY MOUNTED IN GUIDES 5 TO 8 WHOSE COMMON SUPPORT 3 TURNS AROUND AN AXIS 11 PARALLEL TO THE RODS 1, 2; TO CROSS THE TURN WIRE WITH THE RIGHT WIRE, CONTROL DEVICES 12 TO 14, 17 TO 19 TURN THE SUPPORTS 3 ALTERNATIVELY TO THE LEFT AND TO THE RIGHT DURING A DOUBLE STROKE OF THE RODS 1, 2. USE ESPECIALLY WITH TRADES MULTI-PHASE OR WAVING MOUTH CIRCULAR, ESPECIALLY FOR THE MANUFACTURE OF GAUZE FABRIC FOR PACKAGING.

Description

The present invention relates to a device for the control of

  smooth in a circular loom for

  the manufacture of tubular fabrics with gauze weave, comprising

  both outer and inner rods, arranged

  to the ring harness and carrying the healds which,

  to form the crowd, rise and fall under the

  rotating cams, linkages and / or levers.

  There are various types of straight looms for the manufacture of gauze fabric. In a weave fabric

  gauze, the weft threads are bound and locked in

  this to the two corresponding warp threads that were twisted together so that, despite its openings, it is used

  advantageously, for example, as packaging material.

  The object of the invention is to create a control of the rails

  a circular loom for manufacturing even

  on such looms tubular fabrics with gauze armor.

  This result is obtained by the invention, with a device

  of the type indicated at the beginning, thanks to the fact that

  the outer and outer members forming the shed or the pitch are held axially movable in guides whose common support is rotatably mounted about an axis parallel to the rods, and in that there are provided command which, during a double stroke of the rods rotate the support alternately to the left and to the right in order to cross the turn wire with the right wire. With the device according to the invention, the return of weft by the shuttle takes place when the right thread is in the lower pitch and the lap thread in the not

  superior. After each weft reentry, the outer stems

  The inner and outer strings perform a double stroke in which the warp yarns formed by the lap yarn and the straight yarn are, for their crossover, passed one over the other alternately from left to right and from right to left. left, before, to form the pitch, the right wire is raised again in the lower pitch and the lap wire in the upper step. With the device according to the invention, the crossing of the warp son during each double stroke is made by rotating alternately to the left and to the right support carrying the guides for the rods. According to a particularly advantageous embodiment, there is provided a lever directed transversely to the axis of rotation, fixed to the support provided with the guides; this lever carries at its free end a slide or a cam follower which rolls on a rotating cam disk, the slide or the roller being held between the cam disc

by means of a spring.

  To allow the rods to rotate around a pa-

  adjusts to their lift and lowering control well

  coupled with this command, the ends

  of the stems are advantageously connected through the

  connecting rods to the control linkage, the connections being constituted by ball joints or gimbal joints. According to a development of the invention, the crossing of

  warp threads during the double race that takes place after each

  that weft return takes place particularly

  simple thanks to the fact that the rails suspended in

  The smooth rods each comprise a step, and that, on the front parts of these steps, are arranged arms directed toward each other which are provided at their free ends eyelets smooth. The redans are deep enough to ensure the crossing of the warp threads without difficulty and the arms have a length to form crowds

  wide enough for the passage of the shuttles.

  The features and advantages of the invention

  will also draw from the description that follows, as

  example, with reference to the accompanying drawing in which

  FIG. 1 is a perspective view of the

  tif smooth control; FIG. 2 represents the different positions of the rails after crossing the warp threads during the re-entry

frame.

  FIG. 1 shows the control of the heddles of a circular weaving loom of the undulating or multiphase crowd type whose principle structure corresponds to the state of the prior art, so that it is useless to describe it. The inner rod 1 and the outer rod 2 slide axially in a cylindrical support 8. The guides for the rods are constituted by holes 5, 6 and 7, 8 respectively drilled in the lids 9 and 10 of the cylindrical support.

  3. The edges of holes 5 to 8 are filled with a mat-

  anti-friction material. The cylindrical support 3 closed by the covers 9 and 10 is mounted in the machine frame, rotating about the axis 11 passing halfway between the rods 1 and

  2, parallel to these, and wedged in axial displacement.

  To the cylindrical support 3 is fixed a lever 12 directed

  perpendicularly to the axis 11 at the free end 13 of which is

  mounted on the cam follower 14. The opposite side is attached to the

  cylindrical port 3 a lever 15 at the free end of which is hung a traction spring 16 whose other end

  is attached to the machine frame. The spring 16 maintains the

  The cam follower 14 is applied against the cam disk 17.

  The cam disk 17 may be constituted by a rotary ring or by a rotary eccentric. On the cam disk 17 are formed bulges 18 and depressions 19 through

  which, after each weft feed, the cylindrical support

  3 turns to the left or to the right during a double stroke of the rods to cross the warp 20, 21. To raise and lower the rods 1, 2, there are provided pivoting levers 22, 23 pivotally mounted in the machine frame around joints 24, 25 carrying at their free ends rollers 26, 27 rolling on unrepresented control cams concentrically rotating around

  the main shaft of the machine. The other ends of the

  pivoting yokes 22, 23 are articulated by connecting rods 28, 29

  with the lower ends of the rods 1, 2, the joints

  The rods 1, 2 carry, at their upper ends, transversely-oriented, smooth carriers 31, 32, arranged at a distance from each other, in which the rods 1, 2 are arranged at a distance from each other. smooth 35, 36 are hooked by their upper and lower ends. Each carrier carries a multiplicity of smooth, only one of which is shown to simplify the drawing. The healds comprise steps 37, 38 and, at the outer end of each step, are arranged in the extension of a line of smooth arms 39, 40 which carry at their free ends smooth eyelets 41, 42. arm 39, 40 of the rails 35, 36 are directed toward each other. In the eyelet 41 of the arm 39 directed downwards passes the right thread and in the eyelet 42 of the arm 40 directed towards

the top, the turn wire.

  As shown in Figure 2, the redans have a depth

  and such arms 39, 40 a length such that after the crossing of the warp son, the arms can engage

  one over the other far enough to form the step.

  The left part of Figure 2 shows the position of the eye-

  smooth 41, 42 when the crowd is open during the first frame reentry. Then, while the warp threads intersect, the stringers perform a double stroke, the arms 39, 40 engaging one over the other

  opposite, as can be seen in the right part of the fi

  2. The second frame return is then carried out with the

  smooth position represented in the right part of the

  2. At the following weft reentry, the

  take the position that can be seen on the left side

of the figure.

  The weft reentry takes place using the shuttle (not shown) which turns on the shuttle guide track 43.

Claims (4)

  1. Device for controlling healds in a circular loom for making tubular fabrics   with gauze weave, having inner and outer stems   with the healds, arranged concentrically at 1 '   ring to weave, which, to form the step or the crowd,   wind and fall under the action of rotating cams, trin-   gleries and / or levers, characterized in that the rods   the outer and outer parts of the step formation are mounted sliding axially in guides   whose common support is rotatably mounted around a pa-   to the rods, and in that there are provided control devices which, to cross the turn wire with the straight wire, turn the support alternately to the left and   to the right during a double stroke of the stems.   2. Device according to claim 1, characterized in   what is provided a lever attached to the support provided with guides   ges, arranged transversely to the axis of rotation of this support, which carries at its free end a slide or a roller cam which rolls on a rotating cam disk, and   in that a spring adapted to maintain the neck is provided   sledge or cam follower applied against the cam disk.   3. Device according to claim 1 or 2, characterized in that the lower ends of the rods are connected by means of connecting rods with the control linkage, and in that the links are constituted by seals. patella or gimbal joints.   4. Device according to any one of claims 1   at 3, characterized in that the hinges hung in the holders-smooth rods each comprise a step on the front parts of which are arranged arms directed one   to each other who are provided with smooth eyelets to their ex- free tremities.