FR2688236A1 - DEVICE FOR THE SELECTION OF CLAMP VALVE NEEDLES IN NEEDLE CYLINDERS OF A CIRCULAR KNITTING MACHINE. - Google Patents

Abstract

a) Device for the selection of valve needles in needle cylinders of a circular knitting machine; b) characterized in that the means for actuating the tilting selection plates (5) are arranged in relation to the height of the arc of the needle cylinder (1) in which the needles (4) are inserted at the same time in the upper and lower needle plates (3).

Description

"Device for selecting valve needles in cylinders

  The present invention relates to a device for selecting valve needles in the needle cylinders of a double-cylinder circular knitting machine for producing knitwear articles in the form of knitting needles. wherein the needles are guided by needle plates on which are mounted tilting selection plates with two alternately selectable guide pins to be engaged in cam slides for the purpose of guiding needles in knitting or non-knitting position.

knitting.

  Double knitting machines for hosiery articles are known which are equipped with a needle selection device acting on the drawing selection platens for the purpose of selecting between the knitted, jacquard or reverse knitted structures or their combination. In the case of transfer above the selection plates, the needles are transferred to the upper needle cylinder or the needles are selected. This arrangement results in a relatively large height of the needle cylinders required for lifting the pick plates and guiding the needle plates. As a result, relatively large masses are present which have on the force of inertia during the cass e of the machine in case of default, but

  especially during reverse walking.

  An object of the present invention is to overcome the above disadvantages which are essentially solved by means acting on the tilting selection plates which are arranged considering the height of the arc of the needle cylinder in which the needles are hooked. both in the upper and lower needle plates An advantage of the invention lies in the fact that the device makes it possible to select and transfer the needles between the needle cylinders by a simple device requiring little, and in relation with the height, which decreases the height of the cam feed, and in the upper needle cylinder there is no need to have an offset to select the needle plates so that the guide pins

will be empty.

  The device according to the invention with a cam system for knitting knitted or returned knit articles is hereinafter described according to a preferred embodiment with reference to the accompanying drawing. A known double circular knitting machine for producing hosiery is equipped with a lower needle cylinder 1 and an upper needle cylinder 2 which have in the grooves the needle plates 3 of the needles 4 which serve to their guide and their transfer between the needle cylinders 1 and 2 The selection plates 5 with guide stubs 51 and 52 are mounted by means of a pivoting articulation on the needle plates 3 The guide stubs 51 and 52 are placed at the ends which serve for guiding the needle plates 3 and also the needles 4 in the knitting and non-knitting slides, the selection plates 5 are

  also provided with the heels of 5 'drawings.

  The cam system of the lower needle cylinder 1 consists of a cam-shaped upper ring 7, and is formed within the range of the upper guide stubs 51 of the cam path 9 starting at point B in the direction The cam path 9 is terminated by the chamfer 9 '. Then, at the height of the guide stubs 51, the camming path 10 is formed in which the camming path 10 is formed. cams of density 10 and 11 of the two knitting feeds of this machine Between the cam-shaped rings 7 and 8 the cam path 13 is formed to guide the lower guide stubs 52 and the needles 4 at the height of the heel or for guide the empty lower needle plates 3 to a height where their push opens the upper needles 4 The path 13 enters the knitting cam path 14 which guides the operational needles 4 in the direction in knitting wad so that this is related to the correct density cam 15 of the main knitting feed A cam path 16 is further formed in the cam-shaped ring 8 to guide

  needles 4 in the depressed position.

  To sort the needles 4 in the upper and / or lower needle cylinder pushers 17 of the drawing device are used controlled by means of the electronic drawing device or by a drawing drum The pushers 17 are at the height or at the arc of the needle cylinder 1 in which the needles 4 are mounted in the needle plates

upper and lower 3.

  The cam system of the upper needle cylinder 2 consists of cam-shaped rings 18 and 19 and a ring 20. In the range or height level of the lower guide stubs 51 a knitting cam slide 23 is formed. between the cam-shaped rings 18 and 19, that is to say in contact with the cams 24 and 25 of the two knitting feeds. The cam path 23 opens the cam path 26 for transferring the needles 4 into the lower needle cylinder 1 terminated by a chamfer 260 'Between the ring 20 and the cam-shaped ring 19 is the cam slide 27 at the height of the upper guide pins 52 used to guide the empty plates of 'needle

superior 3.

  A pusher 28 is disposed in the cam path 27 to push the guide stubs 52 which are disposed opposite the horizontal section of the cam path 23 A pusher 29 is disposed in the cam path 13 which corresponds to the point In addition there are pushers 30 and 31 which serve to transfer the needles 4 and which act on the guide stubs 52 at the height of the ribs which form the grooves.

needle cylinders 1 and 2.

  The device described above for the selection and the transfer of the needles 4 between the needle cylinders 1 and 2 is as follows: In place of the pusher 17 the needles 4 are mounted in the upper and lower needle plates 3 which are guided by the guide stubs 51 in the cam paths 9 or 23 The pushers 17 sort according to a program the guide stubs 51 and 52 of all the lower selection plates 5 in the pushed and pulled positions. The lower needle plates 3 guided by the heels of guides pulled, or pushed out, are lifted from the point X by the lifting edge 9 of the cam path 9 and through the needles 4 they raise the plates upper needle 3 so that their guide stubs 51 are transferred over the end 18 of the cam-shaped ring 18 and then continue along the cam slide 23 The lifting edge 9 is lifted at the end of the cam. location A, that is to say up to the height at which the guide pins 52 of the lower selection plates 5 reach the level of the pusher 30 which pushes them deeper As a result the lower selection plate 5 inclines the lower needle plates 3, their ends open and release the lower hooks of the needles 4 The lower needle plates 3 are guided horizontally by the cam path 9 behind the location A and the plates of acute 3 are guided upwards by the cam path 23 behind the point A 'which corresponds to the point A so that the needles 4 are transferred to the upper needle plates 3 and then knit in the upper needle cylinder The empty lower needle plates 3 are then lowered by the cam path 9 and their guide stubs 51 are pushed by the chamfer 9 so that the lower guide stubs 52 are pulled out of the cam path 13. The plates 3 guided lower needle according to a program by means of the pushers 17 fired guide heels 52 pass in the path of

  cam 13 under the lifting edge 9 to the pusher 29.

  The pusher 29 pushes the guide stubs 52 so that the upper guide stubs 51 are pulled into the knitting cam path 10 The lower needle plates 3 are held by their horizontal movement by means of the needles 4, and upper needle plates 3 at horizontal level so that their guide heels

  51 pass under the end 18 in the cam path 26.

  There at point C their upper guide stubs 52 strike the pusher 30 which is pushed deeper so that the upper needle plates 3 open and thus release the upper hooks of the needles 4 The lower needle plates which hold the needles 4 are lowered by the edge 10 of the knitting cam path 10 and thus transfer the needles 4 into the lower needle cylinder 1 so that the

  upper needle plate 3 exceeds

  The empty upper needle plates 3 are then lifted by the guide stubs 51 through the cam path 26 to the point where the guide stubs 51 are pushed by the chamfer 260 so that the corresponding guide stubs 52 are pulled into the cam path 27 The upper needle blank plates 3 are guided through this cam path 27 to the pusher 28 which in turn pulls the guide stubs 51 into the cam path 23 The needles 4 are inserted, by the reciprocating movement of the needles 4 and empty needle plates 3, into the needle plates 3 in both the needle cylinders 1 and 2 because of the shape.

  knitting cam paths 10 and 23.

  The invention can be modified in different ways, for example the working edges 9, 10 can be in the sphere of influence of the other guide stubs 52 so that the overall cam system is suitably adapted. In addition instead cam rings conventional cam means can be used Similarly instead of pushers 17 other means can be used

for example tilting levers.

Claims (3)

R E V E N D I C A T IO N S   1) Device for selecting valve needles in the needle cylinders of a double-cylinder circular knitting machine to produce knitwear articles in which the needles are guided by needle plates on which are mounted tilting selection plates with two alternately selectable guiding heels to be engaged in cam slides for the purpose of guiding needles in the knitting or non-knitting position, characterized in that the means for actuating the tilting selection plates (5 ) are arranged in relation to the height of the arc of the needle cylinder (1) in which the needles (4) are inserted at the same time into the plates   needle (3) upper and lower.   2) Device according to claim 1, characterized in that in the direction of rotation (S) are first arranged the means for actuating the drawing stops (5 ') of the lower tilting selection plates (5) and behind them, at height level of a group of guide pins (51) pushed out, is the lifting edge (9) to lift the lower needle plates (3) and, by means of the needles (4), also lift the upper needle plates (3) to the level of the knitting cam path (23) in the needle cylinder superior (2).   3) Device according to claim 2, characterized in that, under the lifting edge (9) to lift the lower needle plates (3), and by means of the needles (4), also lift the upper needle plates up to the height level of the knitting cam path (23) in the upper needle cylinder (2), is located at the height level of the second group of guide pins (52) pushed outwards, a horizontally arranged cam path (13) for moving the needles (4) to the camming path in the cylinder lower needle (1).