FR2460355A1 - RACHEL KNITTING MACHINE WITH SLIDING NEEDLES - Google Patents

Abstract

MULTIBARRES RACHEL MACHINE. THE MOVEMENT OF THE SLIDE 4 AND THE OVERLAPPING MOVEMENT OF THE PASSETTE BARS OF DRAWING 8 ARE CONTROLLED SO THAT THE NEEDLE 1 IS CLOSED IMMEDIATELY AFTER COMPLETION OF THE JETEE ON PASSETTE BARS OF THE BACKGROUND WEFT 7 AT LEAST AFTER THE NEEDLE HAS MOVED A FIFTH OF ITS ELEVATION HEIGHT 9 ON ITS DESCENT MOVEMENT. THE REAR DRAWING PASSETTE BARS 8A PERFORM ONE AFTER THE OTHERS THE THROUGH INDIVIDUALLY OR IN GROUPS DURING THE SWINGING MOVEMENT INTO THE INTERIOR IMMEDIATELY AFTER THE NEEDLES PASSING THE NEEDLES 1. THE PASSETTES BARS OF THE DRAWING 1 NEEDLE NOT BEHIND THE EARLIER 1. OF OVERLAP, ALSO INDIVIDUALLY OR IN GROUPS, AS DURING OSCILLATION OUTWARDS. APPLICATION TO RACHEL-TYPE CHAIN KNITTING Crafts.

Description

1. The invention relates to a knitting machine

  Rachel multibar and slide needles.

  In a known machine of this type (machine LIBA-

  RACOP), the needle opens during the ascent, because the movement

  upward movement of the slide starts only slightly later. When the needle has reached its extreme upper position, (approximately 900 of the knitting cycle),

  it remains in this position while remaining open approximately

  up to 2700, because the slide is in the up position that it reaches approximately 130 and then takes place

  the pier on the guide bars of the shading.

  Then begins the upward movement of the needle still open at the same time as that of the slide, so that

  the closing position of the needle is approxi-

  to 340. The pier beneath all the guide bars can only begin afterwards and must

  end at approximately 60 in the next cycle of trico-

  floor. Only about 750 of the knitting cycle remains for the execution of the pier below, so that in case of long lengths of head, which always exist in case of elaborate variations of the drawing, it is necessary to admit against part a strong limitation of the speed of the machine. The invention relates to a machine in which the time interval available for the execution of the jetty under guide bars of the drawing is extended by a control of the movement of the slide and the headband movement of the guide bars of the pattern according to which the slider needle closes immediately at the end of the pier on guide bars of the weft, at least after the needle has traveled a distance corresponding to 1/5 of its elevation height during its descent movement and the guide bars that are located at the back perform their lateral movement of

  head, during the inward oscillation, indivi-

  or in groups successively, immediately after the passage of the slider needle, while the guide bars of the drawing which are located at the front 2. effect the lateral movement of headframe at the time of

oscillation to the outside.

  The needle also opens during the ascent in the solution according to the invention, because in this case also the upward movement of the slide also begins slightly later, so that when the needle is in the most high, after the slide has reached a position allowing the opening of the needle, the jetty on the guide bars of the shading can take place. But, according to the new rule, the guide bars of the design perform their head movement especially not all together, but individually or in groups;

  those at the rear can execute successively

  their jetty already under the inward oscillation of the shading bars of the shading, in each case immediately after the passage of the slide needles. These rear guide bars of the drawing thus have a time interval ranging from about 1100 to 650 of the

  next cycle, that is, approximately in the

valle corresponding to 315.

  The needle is already closed

  immediately after completion of the jetty on guide rods of the weft, but at least at the end of a path corresponding to a length of approximately 1/5 of the height of elevation, during the downward movement, from the highest position of the needle, because of the complementary stroke of the slide, the guide bars of the drawing which are in front can also start the

  one after another approximately at 240

  oscillation outward until the last drawbar of the design has completed its head movement approximately 1600 of the next cycle, so that these guide bars at the front

  have a total time interval of around 2800.

  The new rule allows to obtain as indicated a considerable lengthening of the time of jetty under bars

  with the help of the drawing, which makes it possible to increase

  the speed of the machine, even when the lengths of 3. headframe are large. The additional stroke of the slide having the effect, as mentioned, that the needle is closed immediately after completion of the jetty on and this needle remaining closed until the felling position is reached, the slide undergoes a specific movement. -

  cial, that is to say delayed, which allows a pro

  Gradually passing through the highest position of the additional stroke to the position of closure of the needle to reduce the forces of inertia, the slide

  can be placed over a greater or lesser distance

above the head of the needle.

  It is particularly important to use in the context of the invention a sliding needle whose shoulder is in the middle of the body or below

  when the needle is in the up position.

  The invention will be described in more detail with reference to the accompanying drawings by way of non-limiting example and in which: - Figure 1 shows schematically, with partial cross-section some of the elements of

  forming a mesh of a Rachel machine according to the invention

  tion; FIGS. 2 to 4 are representations

  identical to those in Figure 1, but at different

  mesh forming pieces; and FIG. 5 is a graph showing the displacement of the mesh forming elements as a function of a revolution of the machine, a diagram on which the solid line curve, the dashed line curve and the broken line curve respectively represent the movement of the slide needles, that of the guide bars and that of the slide, the hatched band representing the forward headband movement of the guide bars, while the cross-hatched band represents the movement of

  headframe to the back of the guide bars.

  The slider needle 1 is mounted in the bar 2 which performs ascending and descending movements and the slider 4 which is fixed to the bar 5 is guided in the 4. needle groove 3. The needle runs its course in the grooves of the felling plate 6. The example shown comprises two guide bars 7a and 7b of the shading frame

  and multiple guide bars 8.

  In the particular embodiment, FIG. 1 represents the slaughter position which coincides with approximately 00 of the knitting cycle, in the manner

  indicated on the graph of Figure 5.

  In the representation of FIG. 2, the needle has already reached its elevation height 9 and the guide bars start the outwardly oscillating movement in the direction of the arrow 10, after the guide bars 7 of the backstory have performed their

  thrown on. Immediately after needle 1 has passed

  Beyond the guide bar 8b which is the most forward, it already begins its head movement, that is to say, approximately 2700 (Figure 3), after the needle has been closed by the additional stroke of the slide 4. From this moment, the following guide bars of the drawing which are at the front part successively perform their movement of headframe. The closing of the needle takes place as mentioned above and according to FIG. 3 immediately after the guide rods 7 of the weft have run the jetty on, but at least before the needle 1 has traveled a fifth the distance corresponding to its height of elevation during

his descent movement.

  The rearmost guide rods of drawing 8a can already begin their headband movement as soon as the inward oscillation begins at approximately 1100, these bars performing this process

  individually, following each other, immediately

  after the passage of the slide needle. The sequence of head movements of these back guide rods can last up to about 65 of the next knitting cycle, as shown in the graph of Figure 5. The slide performs a delayed movement by relative to the movement of descent 12 of 5. the needle, as also shown in Figure 5, so that this slide undergoes relatively low accelerations during its rise and descent while it runs the additional stroke 11 indicated on the FIG. 5 to prevent the forces of inertia being too large,

  so that this slide can exceed in the particular case

  the head of the needle 14 over a distance 13, from the

  as shown in FIG.

  FIG. 3 shows the implementation of a special slider needle 1 in which its shoulder

  is in the middle of its height of elevation 9 or

  below when it is in the upper position to ensure that the jetty on is done in good conditions. 6.

Claims (4)

  1. - Rachel multibar and slide needle knitting machine, characterized in that the movement of the slide (4) and the head movement of the guide rods (8) are controlled so that the sliding needle (1) closes during its downhill movement immediately after the completion of the pier on guide bars of the backstop (7), at least after this needle has traveled a distance corresponding to one-fifth of its height of elevation (9) and the guide bars (8a) at the rear execute the pier under successively, individually or in groups, immediately after the passage of the slider needle (1) during the oscillating movement inward, while the guide bars at the front (8b)   perform the head movement, also individual-   in groups or in groups, only when moving outward. 2. - Rachel machine according to claim 1, characterized in that the movement of the slide (4) is controlled so that it executes an additional stroke (11) closing the needle after completion of the jetty   on guide bars of the base frame (7).   3. - Machine Rachel according to one of the claims-   1 and 2, characterized in that the movement of the slider (4) is controlled so that it executes a delayed downward movement during the downstroke (12) of the needle (1).   4. - Machine Rachel according to any of the   preceding claims, characterized in that the shoulder   (15) of the slider needle (1) is approximately   in the middle of the height of elevation (9) of this needle or below when it is in the high position.