FR2484477A1 - Circular hosiery knitting machine - provides stopping stitches on single needles during decreasing and increasing - Google Patents

Abstract

On a circular hosiery-knitting machine, using more than one knitting system, oscillatory movement is introduced in which needles are withdrawn into a rest position, and are removed singly by pusher cams. In the formation of the heel region, the needles firstly effect a decrease, then increase, in a process where a stopping stitch is formed on the single needle during decreasing and increasing, and the needle is only brought completely to the rest position (or the knit position) before the ensuing stitch formation. Stopping stitches provide high elasticity in the regions of increasing and decreasing, and discourage tearing of the loops. Further, the stopping stitches are knitted over the increase/decrease holes, making the holes smaller and less noticeable.

Description

Circular knitting method and machine for knitting
stockings
The present invention relates to a method of knitting stockings on a circular knitting machine with several systems, in which during an oscillatory movement the needles are withdrawn in a rest position and are only pulled out by pushers and, for the formation of the heel, they first decrease and then increase.

The invention also relates to a circular knitting machine with several systems, for knitting stockings by implementing the method, and which comprises needles, needle pulling stoppers, pushers and stoppers. drive and withdrawal of pushers, as well as decrease fingers and at least one increase finger located outside the knitting region, as well as a knitting oscillation device, with at least two systems for forming the heel, and in which during a stirring movement, all the needles are lowered out of the knitting position by the needle withdrawal tabs and are only exited therefrom by the pushers.

A process of this kind is already known by the patent application from the German Federal Republic
DE-OS 28 25 864. This process produces edges of decreases and increases in the part of the heel, which tear easily, thus tending to cause the stitches to fall. In addition, large holes occur along these edges.

The object of the invention is therefore to propose a method as mentioned above aiming at increasing the elasticity of the knit along its edges having decreases or increases, and largely preventing the stitches from falling.

This result is obtained by the fact that, on each decrease or increase needle, a stopping point is first formed, the needle being brought into its resting or knitting position only before the next formation. of a mesh.

 The stopping points make it possible to obtain a great elasticity in the region of the edges of increases or decreases, which Qvite largely the tears of the meshes. In addition, the breakpoints are on the days, which rAtrScit them and makes them discreet.

The Federal Republic Patent Application
German DE-OS 28 25 864 describes a knitting machine of the type mentioned above, which comprises an augmenting finger situated outside the knitting zone and two decreasing fingers situated inside this zone.

This maohine does not make it possible to produce breakpoints along the edges of increases or decreases.

 The invention therefore relates to a circular knitting machine with several systems, intended for the implementation of the above method, and which is characterized in that all the decreasing or increasing fingers are outside the zone of knitting and in that it includes push rod outlet elements for the hooking position.

 Outside the knitting area, the pushers are well guided and are not subjected to any acceleration in the axial direction. There is therefore no reason to fear twists and turns or decreases or increases do not cause any disturbance in the operation of the machine.

According to ivenntion, the circular knitting machine is made so that, between the decreasing fingers and the push-button exit cleats, it includes additional push-button withdrawal cleats for the hooking position. This allows a safe and rapid exit of the pushers and associated needles in the hooking position.
Other characteristics and advantages of the invention will become apparent during the following description of an exemplary embodiment and with reference to the appended drawings in which
FIG. 1 is a schematic developed view showing the arrangement of the tabs and the control elements of a circular knitting machine intended for implementing the method according to the invention, and
Figure 2 is a schematic representation of the rows of stitches in the heel area.

In FIG. 1, the references I - IV designate four systems of a circular knitting machine for the stockings, with corresponding thread guides Ft - F4.

References 1 - 10 designate needle catches belonging to the different systems, of which part of needle output catches 5 to 8 and of reciprocating catches 11 and 12 can be controlled, and which are mounted on an apron S in a fixed position. These tabs control the needles, one of which is designated by N. The needles are supported so as to be able to move in their longitudinal direction in grooves of a circular arrangement which can, as desired, be brought about with a movement of rotation or d 'an oscillatory movement.

 Under the apron S are mounted push-pieces 13-30 as well as some non-referenced push-pieces. These are used to order pushers, one of which is designated by SCH. The lifters have heels A - D.

 Outside the knitting zone with oscillatory operation, there are arranged decrease fingers 31 and 32 as well as increase fingers 33 and 34.

 The reference G designates a base plate.

The set of cleats, represented schematically and in development, operates as follows:
After knitting a cuff, a bottom leg and possibly a panty part in circular operation, controlling the needles in both directions by means of needle pushers 1 to 10, in the usual manner which will not be described in more detail, the machine goes from circular movement to oscillatory movement when reaching the heel. During the circular movement, the push-buttons back and forth 11, 12 are retracted and do not intervene in the control of the hands. Now the reciprocating cleats 11 and 12 come into operation and the needle exit cleats 5, - 8 are retracted. The needle pulling cleats 1 - 4 lower all the needles N into a rest position. Only systems II, III and IV are still supplied with wire.

 At this time, the SCH pushers come into operation together with the push stops 13 - 16 to control the needles upwards in the t cottage position, the push stops engaging the heels A. The withdrawal of the hands is controlled by the stops pulling needles 2-4 in the opposite direction, and by the two back and forth cleats 11 and 12.

During the oscillating movement anticlockwise, the heels  are lifted by the push stopper 13, are pushed down by the upper return stop 22 and they slide down on the inside of the pusher cleat 14. The lower return cleat 27 lifts the heel D of the pusher, and these operations are repeated under the effect of the cleats 15, 23, 16, 28.

During the oscillating movement in the anti-clockwise direction, the needles which are lifted by the pushers in the knitting position under the effect of the cleat 13, are lowered into the hooking position by the return cleat ll and are then fully retracted by the needle pulling stopper 30 The pushing stopper 15 lifts the needles by the pushing rod in the knitting position, the return stopper 12 lowers the needles in the hooking position and the pulling stopper 4 fully retracts the needles down.

 During the oscillating movement clockwise, the operations take place in the opposite direction.

 For the decreases and the increases, a needle before the beginning of the knitting and another needle after the knitting of the second of the two rows of stitches produced simultaneously are brought in rest position or in knitting position. To obtain a decreasing or increasing elastic seam, with at the same time small days, a stop point is formed on each decreasing or increasing needle. Figure 2 schematically illustrates the resulting rows of meshes. In this diagram, arrows in the middle indicate the direction of the oscillatory movement. The vertical triangles at the ends of the rows of mail-indicate the points of art. Below the diagram of the rows of stitches, the needles are represented and numbered. It appears from the shortening or lengthening of the rows of stitches which are the specified needles which decrease or which increase and which are the needles on which are formed dss stitches.

More particularly, the operations take place in the following manner:
1. Decrease counterclockwise:
The pusher heel D1 (pusher heel of the needle designated by 1 'in the diagram of Figure 2) moves against the decrease finger 31 and is pushed down. The pusher heel D1 passes below the return cleat 26 and the pusher heel
A1 is raised in the hooking position by the pusher cleat 17 and brought into the non-knitting position by the traction cleat 18. All the pusher heels A and
D located in the heel region are controlled in the manner described above by the cleats 13, 22, 14, 27, 15, 23, 16 and 28. When the heel D is lifted by the return cleat 28> the heel push-piece A2 moves against the decrease finger 32 and is pushed down so as to pass below the return cleat 28 during a decrease in a clockwise direction, then it is raised in hooking position by the pusher cleat 20 and brought into the non-knitting position by the traction cleat 19.

2. Decrease in a clockwise direction: the pusher heel A11 passes against the decrease finger 32 and is pushed down. The pusher heel D11 passes below the return cleat 28 and the pusher heel A11 is lifted in the hanging position by the pusher cleat 20 and it is brought into the non-knitting position by the traction cleat 19. All the pusher heels A and D still in the heel region are controlled as described above by the cleats 16, 23, 15, 27, 14, 22, 13 and 26. When the pusher heel D is lifted by the return cleat 26, the pusher heel
A12 passes against the decrease finger 31 and is pushed down so as to pass below the return cleat 26 during a decrease in the anticlockwise direction, it is raised to the position of hooking by the cleat 17 and brought into the non-knitting position by the traction cleat 18.

 The pushers which are brought into the non-knitting position no longer raise the corresponding needles. Since the latter have been lowered to the non-knitting position by the needle pulling tabs, each of the corresponding needles is therefore moved out of its knitting position.

3. Increase anticlockwise: the pusher heel D12 passes against the augmentation finger 33> it is raised and passes below the return cleat 26. The pusher heel A12 is raised to position d 'hooking by the push-button cleat 17. The traction cleat 18 is retracted and by con conquer, the pusher heel A12 returns to the knitting position in the next row and lifts the corresponding needle N. All the pusher heels A and D which are in the heel region are controlled in the manner already described by the cleats 13, 22, 14, 27, 15, 23, 16 and 28. When the pusher heel D is supported - lifted by the return cleat 28, the heel D11 passes against the augmentation finger 34 and it is raised, to pass below the return cleat 28 for an increase in the clockwise direction. The pusher heel A11 is raised in the hooking position by the pusher cleat 20. The traction cleat 19 is retracted, so that the pusher heel A11 returns to the knitting position in the next row and also brings the corresponding needle in working position.

 4. Increase in a clockwise direction: The pusher heel D2 passes against the augmentation finger 34, it is raised and passes below the return cleat 28. The pusher heel A2 is raised in position d 'hooking by the pusher cleat 20. The traction cleat 19 is retracted, so that the pusher heel A2 returns to the knitting position with the corresponding needle in the next row.

All the pusher heels A and D in the heel region are controlled in the manner already described by the cleats 16, 23> 27, 14, 22, 13 and 26. When the pusher heel D is lifted by the return cleat 26, the pusher heel D1 passes against the augmentation finger 33 and it is raised, and it passes below the return heel 26 for increases in the anticlockwise direction. The pusher heel
A1 is raised in the hooking position by the pusher cleat 17. The pulling cleat 18 is retracted, so that the pusher A1 returns to the knitting position with the corresponding needle in the next row of stitches.

 Thanks to the arrangement of two fingers 31 - 34 for decreasing or increasing acting by the two faces, in front and behind the area of the cleats in pendulum movement, the heels of the pushers are in the rest position when they reach the fingers . There is therefore reason to fear no rebound and no irregular movement so that a sar and rapid oscillatory movement is possible.

Claims (3)

1 - Bottom knitting process on a circular knitting machine which works with several systems in an oscillatory movement, in which the needles are withdrawn in a rest position and are only pulled out by pushers and, for the formation of the heel , they first decrease and then increase, a process characterized in that a stopping point is first formed on each decrease or increase needle, the needle not being brought completely into its position rest or knitting position only before the next stitch formation 2 - Circular knitting machine with several systems, intended for the implementation of the method according to claim 1, and comprising needles, needles pulling quets, pushers and driving and withdrawal quets of pushers as well as decrease fingers and at least one 6 trough finger located outside the knitting region as well as a knitting oscillation device for knitting with at least two systems for forming the heel, and during a movement of oscillation, all the needles are lowered out of the soup sorting position by the needles withdrawal tabs and only being taken out by the pushers, machine characterized in that all the fingers for decreasing or increase (31 to 34) are located outside the knitting zone, and push rod outlet elements (17, 20) are provided for the hooking position.  3 - Machine according to claim 2, characterized in that, between the reduction fingers (31, 32) and the push-button outlet lugs (17, 20) are arranged lugs for removing additional pushers (26 , 28) for the hooking position.