FR2649729A1 - DEVICE FOR CONTROLLING MOVEMENTS OF MOVEMENT OF PASSETTE BARS ON A CHAIN KNITTING MACHINE, IN PARTICULAR A SEWING KNITTING MATERIAL - Google Patents

Abstract

Device for controlling movement movements of guide bars on a warp knitting machine, in particular a sewing knitting machine, in which at least two guide bar pushers 5; 6; 7 are arranged vertically one above the other and are each connected with at least two guide bars 2; 3; 4, also held vertically one above the other which have been fitted with hole needles 21; 31; 41 fixed approximately parallel to the axis of rotation 12 of the drawing device 1, and in that each pusher 5; 6; 7 is coupled to an elbow displacement lever 8; 9; 10 whose pivot point 83; 93; 103 has a different position with respect to each pivot point 83; 93; 103 of another angled displacement lever 8; 9; 10.

Description

The present invention relates to a device for controlling

  displacement movements of guide bars on a warp knitting loom, in particular a sewing knitting loom, comprising a rotating drawing device the axis of rotation of which is horizontal, each further comprising an angled pivoting displacement lever for the bars with passettes, which is provided between

  the drawing device and a step bar pusher

  settes, located approximately on the median longitudinal axis of the guide bars, connected articulated with a

guide bar.

  A device of the type mentioned above is already known from DE-AS-1 288 228. As displacement levers, bent levers are used which are all mounted on a common pivot axis. On one wing of each bent movement lever, there is articulated a pusher of guide bars and the other wing palpates drawing supports of a drawing device. The drawing device moves around a horizontal axis of rotation. This device is suitable for controlling guide bars, staggered horizontally one behind the other,

  the hole needles being held about perpetually

  specifically to the axis of rotation of the drawing device.

  If at least two guide bars are to be provided, arranged vertically one above the other, so that the hole needles are approximately parallel to the axis of rotation of the drawing device, like this is necessary for example for knitting and sewing looms, the device described can only be used with serious drawbacks. In this case, we are forced either to give a position of

  oblique start at the pusher of at least one step bar-

  settes, either to rotate the whole device, or, when all the pushers must articulate

  on the median longitudinal axes of the pitch bars

  settes, to make that at least one bent lever of displacement-

  either shorter or longer. An oblique starting position for one or more bar pushers

  passettes leads to unfavorable transmission angles

  bles and insufficient transmission of forces in the pass bar concerned. Lateral forces are exerted on a guide bar with an oblique pusher which must be absorbed by technical means

additional antagonists.

  If we rotate the entire arrangement 90

  known sitive, technical problems arise, diffi-

  eyelashes to be resolved with regard to maintaining, guiding and lubricating the components of the device. If one shortens or if one lengthens one or more bent displacement levers, compared with at least one bent displacement lever unchanged, this device certainly makes it possible to articulate all the pushers in the direction of the median longitudinal axes of the bars to passettes,

  but requires more different types of bases

  rents of drawing supports or also angles of

unfavorable transmission.

  The invention proposes to produce a device of the aforementioned type allowing, by using favorable transmission angles, to control at least two guide bars arranged vertically one

  above the other, respecting the horizontal position-

  tale of the axis of rotation of the drawing device, by means of bent displacement levers, while avoiding increasing the number of basic types different from

drawing supports.

  This object is achieved according to the invention in that at least two pushers of guide bars are arranged vertically one above the other and are each connected with at least two guide bars, also held vertically the one above the other which have been fitted with hole needles fixed approximately parallel to the axis of rotation of the drawing device, and in that each pusher is coupled to an angled displacement lever whose point pivot has a different position with respect to each point of

  pivoting of another angled displacement lever.

  A preferred embodiment is characterized

  in that the position of the pivot point of each cranked displacement lever differs from the position of a pivot point of another cranked lever

  displacement in three spatial coordinates.

  Thanks to the invention, it is possible to make the transmission angles favorable and to ensure that harmful lateral forces are not exerted on the

  guide bars. The number of basic types required

  The space for drawing supports remains strictly limited. Because we respect the horizontal position for the axis of rotation of the device - drawing, there is no problem of maintenance or lubrication. The device can be advantageously used for the control of bars 3 passers staggered vertically

one above the other.

  Various other features of the invention

  moreover emerge from the detailed description which

follows.

  An embodiment of the object of the in-

  vention is represented By way of nonlimiting example,

to the accompanying drawings.

  FIG. 1 is a schematic front view of a device for controlling movement movements, and

  Figure 2 is a top view of Figure 1.

  According to Figure 1, the mechanism includes a drawing device 1 mounted to rotate in a bearing 11

  whose axis of rotation 12 is horizontal. The device -

  drawing 1 can be fitted, as shown, with chains-

  drawings or similar drawing supports, for the execution of movement movements of bars% passettes 2; 3; 4 comprising discs% cams 13; 14; 15. Cam discs 13; 14; 15 have been drawn, for simplicity, in the form of circles of the same diameter. At the bars and passettes 2; 3; 4 are connected

2649729--

  articulated pushers of guide bars 5; 6; 7 which, as regards their initial position, are all arranged approximately on the longitudinal median axis of the guide bars. At the ends of the pushers of the guide bars 5; 6; 7, opposite the pass bars 2; 3; 4, each pusher 5; 6; 7 is provided with an angled displacement lever 8; 9; 10, pivoting, so that the latter serve as transmission means for the movement movements, starting from the drawing device 1. The wing 81; 91; 101 of the angled displacement levers 8; 9; 10, approximate to the i3 cam discs; 14; 15, carries a feeler roller 82; 92; 102, for

detect curved lines.

  Since the pass bars 2; 3; 4 are arranged vertically one above the other so that their needles. hole 21; 31; 41 are positioned approximately parallel to the axis of rotation 12 of the drawing device 1 and because favorable transmission angles have to be applied, the pushbuttons of guide bars 5 .; 6; 7 are also arranged vertically one above the other. The angled displacement levers 8; 9; 10 have pivot points 83; 93; 103 which are in positions

  different, each lever 8; 9; 10 with preferred

  two wings of the same length which have their apex at the pivot points 83; 93; 103. The wings of the levers 8; 9; 10 are also of the same length, in the preferred embodiment shown, so that there are the same lever ratios for all the levers 8; 9; 10. These means allow, in a movement movement control device with a drawing device whose axis of rotation is horizontal, to work with favorable transmission angles, without it being necessary to increase the number of different basic types of drawing supports. The angled displacement levers 8; 9; 10 can naturally be of different length for the same leverage ratio

2649729-

  for all levers 8; 9; 10 and of the same wing length for each lever 8; 9; 10. It is also possible to give the bent displacement levers 8; 9; 10 different wing lengths, without the lever ratios being different from each other. Finally, one can still imagine, in the context of the invention, giving each of the levers 8; 9; 10, different wing lengths and therefore achieve different leverage ratios.

  The different positions of the pivot points

  tement 83; 93; 103 relate to differences in one, two or three spatial coordinates. A difference in position which is characterized by deviations in the three spatial coordinates, constitutes a variant

favorite.

Claims (4)

  1. Device for controlling movement of   displacement of guide bars on a three-way loom   ter warp, in particular a knitting machine To be sewn, comprising a rotating drawing device the axis of rotation of which is horizontal, each further comprising an angled pivoting displacement lever for the guide bars, which is provided between the drawing device and   a push bar with passettes, located approximately   on the median longitudinal axis of the bars   settes, hinged connected with a guide bar, characterized in that at least two pushers of guide bars (5; 6; 7) are arranged vertically one above the other and are each connected with at least two guide bars (2; 3; 4), also held vertically one above the other, which have been fitted with hole needles (21; 31; 41) fixed approximately parallel to the axis of rotation (12) of the drawing device (1), and in that each pusher (5; 6; 7) is coupled to an angled displacement lever (8; 9; 10) of which   the pivot point (83; 93; 103) has a position   different relative to each pivot point (83; 93; 103) of another angled displacement lever (8; 9; 10).   2. Device according to claim 1, character-   rised in that the position of the pivot point (83; 93; 103) of each bent displacement lever (8; 9; 10) differs from the position of a pivot point (83; 93; 103) by other angled displacement lever (8; 9; 10) in three spatial coordinates.   3. Device according to one of claims 1 and   2, characterized in that the wings of the angled displacement levers (8; 9; 10) which have their apex at the pivot points (83; 93; 103), all have the same length and also the same position.   4. Device according to one of claims 1 to   3, characterized in that for all bent levers of displacement <8; 9; 10), we have the same leverage ratios.