FR2518591A1 - PRESS-MESH DEVICE FOR RECTILINE MACHINE - Google Patents

Abstract

THE STITCH PRESSURE DEVICE FOR A STRAIGHT-LINE KNITTING MACHINE, WHICH CONSISTS OF IN THE WORKING ZONE OF ACTIVE SKATES, INCLUDES AT LEAST TWO SKATES 14, 16; 15, 17 INDEPENDENT, OF DIFFERENT PROFILE SHAPE. THESE MAY AT WILL BE MADE ACTIVE OR INACTIVE DURING THE KNITTING PROCESS. THE AVAILABLE PROFILE SHAPES ALLOW OPTIMAL USE FOR ALL TYPES OF KNITTINGS AND SUCCESSIONS OF ONE OR TWO FONTURES THAT CAN BE IMPLEMENTED IN AN ITEM.

Description

251859-1

  The present invention relates to a press-mesh device for a straight knitting machine comprising roof-shaped needle beds and individually movable needles, which is connected to working locations, formed by locks, in the form of knitting systems and mesh conveyor, and which consists in its working area of active pads which extend parallel to the

working front of the needles.

  Mesh press devices are used on straight knitting machines of all types in order to save on the one hand the usual knit traction device or also the tensile weights under the needle beds, and on the other hand to allow economical manufacture of reduced knit blanks for clothing purposes,

  exceptional structure contexts or the like.

  Already known from Swiss patents 516 676, 598 386, (580 / 80-4) different mesh press whose active pads have, in the work area, different shapes of profiles are described

  basically transverse, round, oval, flat and triangular profiles

  as well as several multiform longitudinal profiles.

  The use of such mesh presses has shown that, for example, round transverse profiles are unsuitable for knitting at a needle-bed. On the contrary, flat transverse profiles improve this same knitting without, however, allowing perfect mesh formation.

when knitting at two needle beds.

  Combined profiles for skids, such as those described for example in Swiss Patent No. 592,763, give only partially satisfactory results, because often, in one and the same product, the most diverse knits are combined, such as at a needle bed and at two beds. As a result, with the usual profiles, there is no suitable form that can be used optimally for

  all knits and successions of knits that can be used.

  In addition, all the known solutions have the important disadvantage that, in each case, it is set up in the device, before the beginning of knitting, a form of skate profile chosen once and for all, a change that can not be realized after the judgment

of the machine.

  This results not only in long periods of downtime.

  but in addition the flexibility of use of the machine is consid-

reduced.

  The present invention aims to avoid the disadvantages

2 2518591

  mentioned -the usual mesh press devices.

  This object is achieved according to the invention by the fact that at each working position for the same direction of movement of the locks are associated at least two independent pads, of different profile shape, and that one or the other form of skate profile is likely to be

  made active or inactive at will and during the knitting process.

  Other advantageous features of the invention are indicated below: The pads are arranged at the positions of the locks in the reversal direction The control of the pads is carried out by a program of the

machine; -

  Each pad is attached to a support so as to accomplish an arcuate path around a curing tooth of the needle beds, each pad advantageously having a proper center of rotation, and the rotational movement of each pad being of preference caused

  by a helical cam surface that cooperates with a pin.

  The subject of the invention will now be described in more detail

  using an exemplary embodiment illustrated in the drawing.

  In this drawing FIG. 1 is a simplified partial view of a press-mesh device for a knitting system of a straight double-needle knitting machine with sliders of round and flat profile shapes. FIG. 2 is a sectional view along II-II of FIG. 1 with a flat shoe in action, FIG. 3 is a sectional view similar to that of FIG. 2, but with a round pad in action, FIG. is a schematic representation of the positions

  skates according to their disposition and their direction of movement.

  For a better understanding, we have, for the device

  mesh press shown in Figure 1, placed in the same plane of

  drawing the corresponding organs of the front needle bed and the needle bed

  rear arrows A and B of Figure 2.

  In addition, only the parts that are

  necessary to explain the present embodiment.

  On a machine bench, not shown, are arranged, roof-shaped, two needle 1, 2 (Figure 2) with a felling tooth 33 Needles 5, 6 slide in a plurality of parallel grooves 3, 4 for the displacement needles, locks are used 7, 8

3 25 18591

  which are set up in a common cart 9 movable in-and-out

comes on the beds.

  On the inclined front sides facing the carriage extends

  the actual mesh press device which consists of two

  partial positive 10, 11, front and respectively rear, substantially identical The front mesh device 10 is connected by a base plate -12 to the front lock 7 and, similarly, the rear mesh press device It is connected by the base plate 13 to

the rear lock 8.

  In the case of a single knitting system, the base plate 13 comprises, for example, means for controlling sliders 16 of defined profile shape suitable for a direction of movement from right to left, in accordance with the direction of the arrow indicated in FIG. FIG. 1, and furthermore means for controlling pads 14 of another form of

  profile appropriate to a direction of movement from left to right, that is,

  say the opposite of the direction indicated by the arrow.

  Correspondingly, other pads 15 and 17 are arranged on the base plate 12 and their meaning will be further described in

the following.

  On each base plate 12, 13 are arranged horizontal axes 18, 19 which assume their exact height position relative to the needle beds by means of adjusting rods 20, 21 and blocks

fastening 22.

  In order to obtain, for the axes 18, 19, different positions of the center of rotation, the adjustment rods 21 are shorter than the adjustment rods 20 A screw fastener 23 (FIG.

  fine adjustment, easy, by rotation of the adjustment rods.

  Each axis 18, 19 is surrounded by a drum-shaped sleeve 24, 25 which, on both sides, is supported by covers 26, 27

  and is laterally secured by clips 28.

  The pads 14 to 17 are rigidly connected to the outside of the movable bushings 24 and 25 and have, in the zone of the needle beds I and 2, different profile shapes, as well as actuating bolts.

  29 arranged opposite the bent portion of the pads.

  Actuation bolts 29 are in contact with control cams 30, 31 which are put in place on a common control lock

mobile 32.

  A torsion spring 34, placed between the shafts 17, 18 and the bushes 24, 25, makes a permanent support of the actuating bolt 29 on the corresponding control cams 30, 31 and, at the same time, a support elastic skates 14 to 17 on the knit that lies between

the two needle beds 1, 2.

  As is also apparent from Figures 1 and 2, during a lateral displacement of the control lock 32 and thus the control cams 30, 31 away from an average position, it ensures a rotation of the sleeves 24, 25 and skids 14 to 17 in either direction of the

double arrow shown.

  The operation of the mesh press device of the invention, according to the example shown, will now be explained in more detail.

  with particular reference to Figure-4.

  When making an article on a straight knitting machine, one normally starts with a curb, holding the needles.

  both needle beds being put into action.

  For this purpose, skates with a formaldehyde

round profile.

  For this purpose, in FIG. 4a, for the movement of the carriage from right to left in the direction of the arrow, the control cams 30, 31 of the front device are brought by a control program in the left position. thus to the skate 15 of round profile shape

  to be tilted in the working area of the needles (Figure 3).

  On the contrary, the control cams 30, 31 of the rear device remain in the average position in order to keep the two inactive.

pads 14 and 16.

  After completion of the movement of the carriage in one direction, it causes, for the backward displacement, a change of position of the

control cams -

  As shown in FIG. 4b, and in the direction of the arrow, the control cams 30, 31 of the front device are now brought into the mean position, which makes the two pads 15 and 17 inactive. rear device control

  are instead ordered to the right to release the pad 14-

and make it active -

  This process of activating and deactivating the pads 14 and 15 of round profile shape according to the direction of movement of the

trolley is repeated at will.

  If, however, during the manufacture of an article, it is desired, for example, to perform a knitting at a needle-bed in which only the needles of a needle bed are used, it is then necessary

  to use another form of skate profile, namely a flattened shape.

  In FIGS. 4c and 4d, it is shown how, in a corresponding manner, the pads 16 and 17 are alternately activated according to whether the carriage is moved from right to left or vice versa.

  control of the control cams 30, 31 is similarly carried out.

  Because the pads do not interfere with each other as they move in the form of an arc around the felling tooth 33, since they do not describe a common arc section, the device can be rendered

totally inactive.

  In the general context of the invention, it is irrelevant whether the straight knitting machine is one or more systems because

  this then requires only an obvious development.

  It should further be understood that such a device is not only suitable for working locations for mesh forming but is also suitable for mesh transfer work sites or the like, and-generally where

  different profile of pads are to use.

Claims (4)

  A press knit device for a straight knitting machine comprising roof-shaped shaped beds (1, 2) and individually movable needles (5, 6) which is connected to working locations formed by locks (7, 8), in the form of knitting systems and mesh transfer, and which consists in its working area of active pads (14-17) which extend parallel to the working edge of the needles, characterized by the that at each working position for the same direction of movement of the locks (7, 8) are associated at least two independent pads (14, 16, 15, 17) of different profile shape, and that one or the other form of shoe profile is likely to be made active or inactive at will and during the knitting process.   2 mesh press device according to claim 1, characterized in that the pads are arranged at the reversal locations of moving locks.   3 mesh press device according to claim 1, characterized in that the control of the pads is performed by a program of the machine.   4 mesh press device according to claim 1, characterized in that each pad is fixed to a support (12, 13) so as to perform a path in the form of a circular arc around a felling tooth (33) bedbugs.   Mesh press device according to Claim 4, characterized:   in that each pad has its own center of rotation.   6 mesh press device according to one of the claims   4 and 5, characterized in that the rotational movement of each pad is caused by a helical cam surface (30, 31) which cooperates with a peak (29).