FR2490254A1 - METHOD FOR REMOVING THE END OF THE WIRE FROM A BASE AND DEVICE FOR IMPLEMENTING SAID METHOD - Google Patents

Abstract

THE INVENTION RELATES TO A PROCESS FOR REMOVING THE YARN END AT THE EDGE OF KNITTED STOCKINGS ON SMALL SIZE CIRCULAR KNITTING LAMPS AS WELL AS A DEVICE FOR IMPLEMENTING THIS PROCESS. ACCORDING TO THE INVENTION, DURING THE OPERATION NECESSARY FOR THE SUBSEQUENT WORK OF THE SOCKETS, FOR EXAMPLE DURING THE CHECKING AND TURNING, THE BOTTOM 1 IS SLIDED, STARTING WITH THE OPEN END 2 ON AN OPENING HOLDER 3, SUCH AS THAT EDGE 4 OF THE BOTTOM ENDS AT THE MOUTH 5 OF THE WORK HOLDER, THEN WE BRING THE WORK HOLDER 3 CARRYING THE BOTTOM 1 TO THE CUTTING DEVICE 6 PROVIDED OPPOSITE THE FRAME OF THE WORK HOLDER. THE EDGE WIRE 7 IS PNEUMATICALLY SUCKED IN THE HOLES 9 PROVIDED ON A CIRCLE IN A KNIFE SUPPORT DISC 8 AND CORRESPONDING TO DOOR 3 AND IT IS CUT BY KNIVES 11 WHICH TURN BEHIND THESE HOLES 9.

Description

The invention relates to a method for removing the end of the wire at the edge of

  knitted stockings on small circular knitting machines and a device for carrying out the method and preferably applies in combination with necessary operations after knitting, for example during the control, rollover etc. .

  A generally known method of manufacture and

  Continuous stocking of stockings, preferential for knitting stockings on small circular

  to remove needles each finished stock, after the interruption

  wire feeding, blocking and cutting the wire, and then starting the next down by bringing wire back to the needles. The locking member and the wire guide are arranged in the usual way, behind or in front of the

  knitting in the direction of rotation of the needle cylinder.

  Depending on the position of the locking member, the thread guide moves, when starting a new stocking, in front of or behind the knitting point so that the thread between the

  wire guide and the locking device can be grasped by the

  which are at the point of knitting.

  Once a certain number of needles pass through the

  knitting point seized the thread, the locking member

  the end of the wire that remains then, as an end

detached, at the bottom edge.

  This piece of loose wire remaining at the edge can not be kept short enough, as needed, because the distance between the locking member and the first needle

  passing through the knitting point and with which one starts

  this the first rank of the new low can not be lower than a certain minimum. To give all the same to the bottom edge

  look good, cut the piece of wire that

  pass, by manual work that requires time. However, the manual cutting of the thread involves another risk is that the end is cut too short and it can slip back through the first mesh, which gives

a defective edge.

  To eliminate these disadvantages, it has been proposed for example in DE 2 142 778 and 2 423 840

  apply in the knitting machine and which consists of

  expensive yarn by lowering needles

  born immediately before the needle that forms the first stitch of the new row. The rest of the thread must have negligible length. However, when working with large threads and textured synthetic threads,

  requires very great strengths and also very large

  needles, which has a detrimental effect on the

  all the knitting tools so that these solutions, as well as the plate proposed for example for the cutting of the wire by the US Patent 1,691,887 have not

  have been applied extensively to traditional crafts.

  In German Offenlegungsschrift 2,551,904 a solution is proposed whereby the yarn guide is first passed through the knitting stitch and, once the yarn has been gripped by the first needle, it is moved in front of the yarn. knitting point, one or more needles being brought after the first needle to a position in which the thread is not gripped

  of knitting, so that the thread, which was initial--

  between the yarn guide and the first needle, is knitted by the needle or needles not first grasping the yarn, when knitting the next row, giving said stitches

double wire.

  This solution also, which presents a progress on the tearing of the yarn, can obviously be achieved only on

  -25 a small number of machines, especially those of

  tion. Cutter devices known as "Gordon-Solis" cutter devices, generally used on single-cylinder machines provide a satisfactory solution here but can not be transposed for

double cylinder looms.

  At least in the majority of knitting

  Cylinder used currently knitted, too long edge is an unresolved problem, which is also the case on most of the double-cylinder looms

  which are still offered and are on the current market-

  LEMENT. Therefore, the knitted socks on such looms must be led to a process of manual labor, the cutting of the edge wire, which, in addition to the disadvantages mentioned,

  still leads to a disruption in the production process.

and increased expenses.

  The object of the invention is to provide a method and a dis-

  which makes it possible to perform more economically

  the long, loose end of yarn at the edge of knitted stockings on small circular looms

  dimension, in operations necessary after the trico-

  floor. According to the invention, the problem is solved by a method characterized by the fact that the bottom, starting with the open end, is pulled on a hollow work-holder having in a known manner a cylindrical shape, so that the bottom edge ends at the mouth of the workpiece holder, that is then brings the workpiece carrying the bottom to align with a cutting device and then brings said workpiece holder to the cutter device, sucks the edge thread that protrudes into this cutter device and is cut, the workpiece is brought back, a knife support disc is moved, the cutter holder is approached again, the wire is sucked edge in this device and it is cut, we bring back the work-holder and we evacuate the bottom through the interior of the work-carrier and we bring it to a depot

  from down. It can be noted that when one has pulled down

  opening the end of the workpiece so that the edge ends at the mouth of the latter, the workpiece is brought to align with a cutting device placed opposite the frame of the the workpiece, then it is brought to the cutter device, and the excess edge thread is sucked up and cut, and then, to ensure that the maximum length of edge thread is left for the case where would be in the most unfavorable region, between two holes of the cutter support disc of the cutter device, the holder carrying the

  first cutting device, and a disk of

  knives from an angle determined in reverse of the sense of

  knife, after which we approach again the workpiece of the dispositf cutter, and we suck the wire of

edge and cut it.

  It is advantageous to move the bearing disc of

  between the first and second cutting processes, an angle such as the length of the corresponding arc, on the

  diameter of the circle of holes, corresponds roughly to the diameter

meter of the holes.

  Advantageously, the edge wire is further led to the cutting device by means of a stream of compressed air which is

through the bookshelf.

  For the implementation of the method, it is used according to the invention a cutting device placed opposite the mounting of the workpiece holder. This device is characterized by the fact

  it comprises a cylindrical casing provided with at least one

  air cord, with a knife support disc presenting

  passages, preferably holes, and movably mounted

  around its axis in a certain margin and on which

  at least one cutterbar carrying at least two cutters

  applies under spring action in such a way as to

  see turning axially so that during rotation

  the cutting edges slide along the holes,

  these and thus cut off the aspired edge wire. The knife bar (s) and knives are each mounted so that they can tilt around their line

  median, orthogonal to the axis of rotation.

  The following invention will be more specifically explained with reference to an exemplary embodiment represented by the appended drawings in which: FIG. 1 is a perspective view of the arrangement of the workpiece holder and the cutter device;

  FIG. 2 is a perspective view of the portable

  both a bottom and aligned on the cutter device in the cutting position;

  FIG. 3 is a sectional view of the cutting device

  line A-B of Figure 2; FIG. 4 is a basic view of the position of the edge wire a) before the first cutting,

  (b) after the first cut, with the

  towed and the knife support disc being moved, c) when the workpiece has been approached again from the knife support disc, shortly before the second cut,

  d) after the second cutting, the holder being re-

  towed. The device shown in the drawings comprises a cylindrical casing 15 provided with at least one air connection 14, with a knife support disc 8 having passages, preferably holes 9, and mounted movably around axis within a certain margin and on which

  least one knife bar 10 carrying at least two necks

  11 applies under spring action so as to

  able to rotate axially so that during the rotation

  The cutting edges 10 slide along the holes 9, overlap the holes 9 and thereby cut off the suction edge wire. The bar portecouteaux 10 and the knives 11 are each mounted so as to tilt around

  their median axis orthogonal to the axis of rotation.

  Advantageously, the knife support disk is

  such that the holes are arranged on a circle of holes corresponding to the diameter of the holder, that the width of the threads between the holes is less than or equal to the diameter of the holes and that the diameter of the holes is preferably given by the relation B = where L is the maximum remaining permissible length of the edge wire and

  S the distance between the mouth of the book-holder and the over-

  cutting face of the knife support disc.

  To facilitate the guiding of the edge wire, the holes of the knife support disc are chamfered on the opposite side to

the cutting surface.

  The method that allows this device is as follows: The bottom 1 knitted by the loom is slipped, starting with the open end 2, on the hollow door 3 of cylindrical shape which is in the position of implementation I, in the desired measure so that the bottom edge 4 ends flush

  of the mouth 5 of the holder. We turn the door

  3, by means of a known drive, to the working position II where it is aligned with the cutter device 6 and

  then fed to the cutter device 6 subjected to a vacuum

  air ration. The downwardly hanging edge yarn 7 is attracted, when the bottom is approaching the cutter device 6, into one of the holes 9 of the dis-nle (knife trouble 8, the additional compressed air applied through the inside of the 3 to facilitate this operation.At the back of the knife support disc 8 turn one or more bars portecouteaux

  driven by known means and pushed by a res-

  17 against the knife support disc 8 and whose knives 11 slide along the holes 9 o they cut the

  edge wire 7 located in a hole 9, by a shearing action

  with the edge of the hole. The knife bar or bars 11 and knives 11 are each mounted so as to tilt about their central axis, orthogonal to the axis of rotation. To ensure the maximum permitted length of the edge wire, in particular when the bottom edge 4 is in a position such that the edge wire 7 is in the direction of the thread 12 and consequently to the edge of the hole o the cutter 6 is moved away from the cutting device 6 after the first cutting, after which the knife support disc 8 is moved, in the opposite direction of rotation of the cutter. the knife bar 10, an angle such as the length of the arc

  corresponding, on the diameter of the circle of holes, correspon-

  about the diameter of the holes, which is achieved by

  generally known means with back pressure of

  fate. When the book-holder 3 is again brought to the dis-

  positive cutter 6, the edge wire 7 eventually remained too

  long during the first cut is drawn into a hole 9 main-

  holding staggered in the threads and cut by the edge

  16 of the knife 11 going past. Once the door

  3 has left the cutter device 6, the bottom is pushed upside down of the positioning direction, in known manner, for example by means of traction rollers and transported by means of an air suction, through the work carrier, down to the bottom 13. During the work of a bottom 1, the next bottom 1 is pulled on a workpiece which has turned to the position of implementation I and the operation is also repeated often that we want. In FIG. 3, the cutter device is shown in section along the line A-B of FIG. 2. It is advantageous here that the arrangement of the holes 9 in the knife support disc 8 is made under the

  dependence of the diameter of the structure, the minimum length

  male and also the maximum length of the edge wire, the threads 12 between the circular holes 9 of the support disc of

  knives 8 to be at most equal to the diameter of the holes.

  The solution according to the invention guarantees a cutting on too long edge wire obtained by virtue of the technique of

  knitting on many small circular

  mension, the integration of the cut in an operation which follows the knitting, here for example the control and the reversal,

  taking place without taking extra time. relatively

  annual cut, there is a noticeable improvement in the minimum length

  and the maximum length that the edge wire can not exceed

  ser. Damage to the edge is excluded and we avoid loss of quality. At the same time, for the subsequent work of stockings with too long threads and made on small circular looms that can not be converted due to a large complication or

  spending too much, we found a simple and realistic solution

  sand with little means, to a problem that had arisen since

  for a long time and had not yet been satisfactorily solved

health.

Claims (8)

  A method for removing yarn ends at the knit bottom edge on circular looms, characterized by   do we pull down (1), starting at the end or-   green (2), on a hollow work-carrier (3) having in a known manner a cylindrical shape, so that the edge (4) of the bottom ends at the mouth (5) of the work-carrier, that thereafter the work carrier (3) carrying the bottom (1) is brought to line up   on a cutting device (6), and then bringing said holder   structure (3) to the cutting device (6), the overlying edge wire (7) is drawn into this cutting device (6) and   the cut, we bring back the book-holder (3), we move   a knife support disk (8), the door (3) of the cutter device (6) is approached again, the edge wire (7) is sucked into this device (6) and it is cut, it is brought back back the work-carrier (3) and the bottom (1) is evacuated through the interior of the work-carrier (3) and brought at a stocking (13).   2. Method according to claim 1, characterized in that between the first and second cutting process, the knife support disc (8) is moved by an angle such as the length of the corresponding arc, on the diameter of the   circle of holes, corresponds roughly to the diameter of the holes.   - 3. Method according to claim 1, characterized in that it facilitates the guiding of the edge wire by means of a stream of compressed air passing through the work-carrier (3). 4. Device for implementing the method according to   one of claims 1 to 3, characterized by the fact that   comprises a cylindrical housing (15) provided with at least one   air cord (14), with a knife support disc (8) having passages, preferably holes (9), and movably mounted about its axis in a defined margin and on which at least one cutterbar (10) carrying at least two knives (11) is applied under an action of   spring so as to be axially rotatable   during cutting of the blades (10), the cutting edges (16) slide along the holes (9), cover them and   thus cut off the suction wire (7).   5. Device according to claim 4, characterized in that the knife bar (10) and the knives (11) are each mounted so as to tilt   around their median axis orthogonal to the axis of rotation.   6. Device according to one of claims 4 and 5,   characterized by the fact that it comprises several bars knives (11).   7. Device according to claim 4, characterized in that the holes (9) of the knife support disc (8)   are arranged on a circle of holes corresponding to the diameter   the workpiece is such that the width of the threads (12) between the holes (9) is less than or equal to the diameter of the holes, the diameter of the holes being preferably given by the relation D = L-S in which L is the length   maximum permissible limit of the edge and the distance   be the mouth of the holder and the cutting surface of the knife support disc (8).   8. Device according to one of claims 4 and 7,   characterized in that the holes (9) of the knife support disc (8) are chamfered on the opposite side to the surface cutting.