EP0881315B2 - Sliding-tongue needles for knitting machine - Google Patents

Abstract

The needle (1) has a hooked end (3) and a slider (2) with a heel (4), a beak (5) and a shoulder to support the stitch. The slider moves relative to the needle to open and close the hook with its beak and move each stitch with its beak and shoulder. The slider has a U-shaped cross-section and a stepped end forming the beak for carrying a stitch. For part of its length from the beak the slider recess is wide enough to permit the passage of a needle with a stitch on it.

Description

The present invention relates to a sliding needle for a knitting machine, comprising a needle provided with a spout and a slider provided with a heel, a spout and a shoulder of mesh support, this slider being movable relative to the needle to close and open the needle beak by its beak and to cause a mesh through its beak and its shoulder to perform a mesh transfer.

Slide or piston needles have been known for a long time.

The first sliding needle for industrial use, created by J. F. WILCOMB in 1924, has a needle moving inside a slide. This construction only allowed the closure of the needle beak, but not the mesh transfer by the slide.

of the US Patents 4,043,153 and 5186026 and patent applications DE 31 51 150 , 32 20 049 and 4,231,015 Sliding needles are known, the actual needle of which is in the form of a slider in which a piston moves which closes the needle beak. Using a plunger to close the needle tip removes the valve from traditional needles, resulting in a more robust needle and reducing the needle stroke when forming the mesh. . The piston also makes it possible to carry out a mesh transfer from a needle of a needle bed to a needle of the opposite needle bed. This piston-and-needle construction has been adopted by other manufacturers. The needle is always the piston, except in the construction according to U.S. Patent 4,434,627 , in which the piston, U-shaped, is under the needle, or surrounds the needle.

For the execution of the mesh report the sliding needle is sometimes equipped with a patch attached to the side of the needle ( DE 36 24 038 ).

Also known are coumpound side spring needles, as well as dual slide needles.

In general, with the piston needles according to the prior art, the reception of the carried mesh is always carried out by and in the beak of the needle. Therefore, if a mesh is already present in the beak of this needle, it is impossible to differentiate the following action, carry or knitting, for each of these meshes.

On the other hand, to laterally transfer a set of meshes of a number of needles to neighboring needles, operation commonly known as "punching", it is necessary to use an auxiliary needle bed in which needles or punches come grasp the stitches on the needles to transfer them to the other needles.

The object of the invention is to provide a sliding needle according to claim 1, which offers new possibilities of knitting, in particular the possibility of punching without needles and auxiliary punches.

The slide needle according to the invention is characterized in that the slide has a U-shaped profile through which it overlaps the needle, and that it is split in its end region, including the spout, to let a needle pass or an opposite slide for executing a mesh transfer or punching.

In a straight knitting machine with two needle beds movable longitudinally, the sliding needle according to the invention therefore not only makes it possible to ensure the known function of mesh transfer, but also the punching function for the needles of the opposite needle bed, by simply moving a bed. It is thus possible to do without auxiliary needle bed and its punches.

The slide overlapping the needle, it can withdraw into the slide with one or more meshes, while another mesh can remain on the slide held in the up position. The meshes on the slides can then be transferred to the slides or in the beaks of the needles of the same needle bed or the opposite needle bed. With the same needle, it is thus possible to separate meshes and to work them in different ways.

In order not to injure the mesh or meshes which are thus inside the slide, the latter has, for a part of its length from its beak, an inner width substantially greater than the thickness of the needle so as to allow the passage of the mesh or stitches in the beak of the needle.

The movements required for the different operations of the slide needle according to the invention are of very small amplitude. This reduces the length of the cam carrier, reduces the stroke of the carriage and increases the production of knitting.

1. a) de réceptionner une maille sur une coulisse tout en ayant une ou plusieurs mailles dans le bec de l'aiguille correspondant à la coulisse qui réceptionne;
2. b) de réceptionner une maille dans le bec de l'aiguille;
3. c) de reporter cette maille ou une autre maille, tout en conservant une ou des mailles dans le bec de l'aiguille correspondant à la coulisse qui effectue se report, la maille ou les mailles présentes dans le bec de l'aiguille pouvant être ensuite reportées ou tricotées;
4. d) d'utiliser la coulisse comme élément de relais pour déplacer une ou un ensemble de mailles de la même fonture par poinçonnage.

In summary, the sliding needle according to the invention allows:

1. a) receiving a mesh on a slide while having one or more meshes in the nozzle of the needle corresponding to the slide that receives;
2. b) receiving a mesh in the beak of the needle;
3. c) to postpone this mesh or another mesh, while maintaining one or more meshes in the bill of the needle corresponding to the slide that is carried out, the mesh or the meshes present in the bill of the needle which can then be carried over or knitted;
4. d) using the slide as a relay element to move one or a set of stitches of the same needle by punching.

The attached drawing represents, as example, an embodiment of the sliding needle according to the invention.

Figure 1 shows a side view in forming position.

Figure 2 is a side view of the slide alone.

Figure 3 is a top view of the slide, in the direction of the arrow, Figure 2.

FIG. 4 is a sectional view along IV - IV of FIG. 2.

Figure 5 shows the slide needle in the mesh transfer preparation position.

Figure 6 shows the slide needle in the mesh transfer position.

Figure 7 shows the sliding needle in the punching position by the slider of a needle of the opposite needle bed.

The slide needle shown consists of a needle 1 and a slide 2 within which the needle 1 slides.

The needle 1 is provided with a spout 3 at its end. In the embodiment shown, the needle 1 has no heel because it is supposed to be driven by a key. It could however be provided with one or more heels for its drive by the cams of the cam carrier.

The slide 2 has a U-shaped profile (FIG. 4) through which it overlaps the needle 1. At the rear, the slide 2 is provided with a heel 4 for its drive and at the front it has a spout 5 of which the upper part is located below the level of the back of the slide so as to form a shoulder 6. On the spout 5 the sides of the slide are closed along a line of joint 15 so as to form a rounded sliding surface for the sts. The edges of these sides are further rounded between the end of the spout 5 and the lower edges 8 of the slide. Behind the shoulder 6 the U-shaped profile is interrupted over a certain length so as to form a passage 7 at the back of the slide. On a part of the length of the slide, from its spout 5, the average width of the U-shaped profile of the slide is substantially greater than the thickness of the needle 1. In FIGS. 1, 5, 6 and 7, schematically represented the profile of two opposite needle beds 9 and 10 of a straight double-needle knitting machine.

In Figure 1, the spout 3 of the needle 1 is closed by the nozzle 6 of the slide, so that the wire 11 is trapped in the needle beak.

Figure 5 shows the slide needle in the mesh transfer preparation position. Needle 1 is in the up position. By sliding on the needle the wire 12 is raised above the nozzle 5 of the slide.

In Figure 6, the needle 1 is shown in the down position. The slide 2 is high and the mesh 12 bears against the shoulder 6 of the slide. A needle 1 'of the opposite needle 10, can engage in the slide 2 and through it through its passage 7 to enter a mesh carried by the slide 2 for its transfer. In this position, we see that the spout 3 of the needle 1 is in the U-shaped part of the slide. The clearance between the needle 1 and the slide 2 allows the mesh or meshes in the spout 3 of the needle to engage in the slide without being injured.

FIG. 7 represents the sliding needle in the same position as FIG. 6, but instead of being an opposite needle 1 'which engages in the slide 2, it is the corresponding slide 2' which engages 2. When the slide 2 is down, the mesh that was on the nozzle of the slide 2 is on the slide 2 '. The function of the slide 2 'is thus that of a punch. The needle bed 10 can be moved to the left or to the right in order to transfer the meshes carried by the slides 2 'onto needles 1 of the needle bed 9 or on the slides 2 of the needle bed 9 at the end of a transfer onto the needles. 10. All the possibilities are open.

It should be noted that the clogged hole technique remains possible and that a comb transfer, as described in EP 0 362 126 is also possible with the slide.

Claims (1)

1. Slider type needle for a knitting machine comprising a needle (1) equipped with a beard (3) and a slider (2) having a U-shaped profile by means of which it straddles the needle and equipped with a bull (4), with a nose (5) and with a stitch bearing shoulder (6) at the rear of which the back of the slider has a cutout (7), this slider being displaceable relative to the needle in order to close and open the beard of the needle by means of its nose, said slider being split (7,15) in its end region, comprising the nose, in order to allow a needle to pass through to carry out a stitch transfer in order that it should be able to drive a stitch by means of its nose (5) and its shoulder (6) so as to execute a stitch transfer, characterized in that, in order to carry out a stitch transfer from slider to needle, and from, slider to another slider, said other slider having n punching function, on the nose (5) of the slider, the sides of the slider close along a joining line (15) so as to form a rounded sliding surface for the stitches, in that the edges of these sides are rounded between the end of the nose (5) and the lower edges (8) of the slider and in that the rounded parts of said edges and said joining line (15) join at the end of the nose (5) and in that the slider (2) has, over part of its length, starting from its nose, an average inner width which is substantially greater than the thickness of the needle, so as to make it possible for a stitch located on the needle to pass through, and presents, except its nose, a constant width.

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