EP1522618A1 - Sinker of a flat knitting machine - Google Patents

Abstract

The plate (1, 1') has several stitch hold-down surfaces (12, 13) : The plate has a stitch hold-down surface (12) for single knitted fabrics and one or more stitch hold-down surfaces (13, 13n) for double knits. The hold-down surfaces are distributed over regularly- or irregularly spaced peripheral locations of the plates. The surfaces have essentially radial orientation relative to the axes of rotation (18) of the plates. The plate includes a functional surface (11) to form stitches.

Description

The invention relates to a circuit board of a flat knitting machine for Hold down stitches.

Such boards of flat knitting machines are made, for example EP 0 238 797 and EP 0 424 717. The boards of the Flat knitting machine according to EP 0 238 797 B1 are at the same time Hold-down elements and mesh images, while the boards of the Flat knitting machine from EP 0 424 717 B1 only one Hold down function and with a rigid on the needle bed arranged mesh images interact. The boards of both However, known flat knitting machines are the same disadvantages common. Both boards have only one hold down, so it is not possible to stitch both embedding and safely hold down double-bed knitted fabrics.

From FR 1 207 319 are pivotally mounted mesh images known, which additionally provided with a stitch retention hook are. The pivoting movement of these mesh images is through translationally movable slide, which is below the fulcrum and are arranged below the stitch retention hook initiated. Even with these known mesh images with stitch retention function is not an equally safe hold down function given of stitches of single-bed and double-bed knitted fabrics.

EP 0 567 282 shows pivotable stitches with stitch retention hooks for flat knitting machines with a single needle drive. The pivoting movement of the mesh images is through translationally moved slides initiated. These sliders are with the needles frictionally connected, so they exclusively can move in the same direction to the needle. A Variation of the stitch retention function depending on the type the knitwear, d. H. of double or single-bed knit is also not here.

The present invention is based on the object, the board a flat knitting machine educate so that holding down of mesh single-bed and double-bed knitted fabrics in optimal Way is possible.

This task is solved by a board, which several Has mesh retaining surfaces. This embodiment ensures it, that regardless of whether a single or double-bed knitted fabric is created, one of the mesh holddown surfaces is able to function the safe To take over stitches.

For double-bed knit the stitches of the Hold down hold-down plates of the opposite needle bed. This is usually another height position in relation on the comb gap required as when holding down the stitches a single-bed knitted fabric, where the hold-down boards the Hold down meshes of your own needle bed. Are now several Holddown surfaces provided so are the boards in excellent way for both single and for double-bed knitwear.

In addition, the additional hold downs can also be a Fulfill a backup function, if a scam but once from should solve the deepest holddown. This mesh will then detected by one of the following surfaces. This danger of Slipping off the hold-down surface is especially at given large meshes, as these are only low voltage abut the holddown surfaces.

It is advantageous if the plurality of mesh retaining surfaces at different, same or different spaced circumferential locations of the boards are arranged.

The plurality of mesh holddown surfaces may relate to the Rotary axes of the boards a substantially radial orientation exhibit. However, they can also be designed hook-shaped.

The axis of rotation of the board can preferably above the Needle shafts can be arranged. Also by this measure can be improve the hold down effect of the board, as the Maschenniederhalteflächen at relatively high on the needle bed arranged rotary axes, the mesh legs in the lower Include pivot position better.

In a further embodiment, the boards can more Mesh holddown surfaces and at least one mesh canvas exhibit. They combine both the hold-down and the Meshing function in itself. In another variant can the boards only have multiple mesh holddown surfaces and with stitches rigidly attached to the needle beds interact.

Fig. 1

einen Querschnitt durch ein Nadelbett einer ersten Flachstrickmaschine mit einer Platine in vollständiger Öffnungsstellung;

Fig. 2

einen der Fig. 1 entsprechenden Querschnitt mit der Platine in vollständiger Schließstellung;

Fig. 3

eine der Fig. 1 entsprechende Schnittdarstellung mit der Platine in einer Zwischenstellung;

Fig. 4

einen Querschnitt durch zwei Nadelbetten einer zweiten Flachstrickmaschine mit gegenüberliegenden Platinen.

Hereinafter, two preferred boards according to the invention as using embodiments of flat knitting machines will be described with reference to the drawings. It shows:

Fig. 1

a cross section through a needle bed of a first flat knitting machine with a board in the fully open position;

Fig. 2

one of Figure 1 corresponding cross-section with the board in the fully closed position.

Fig. 3

one of Figure 1 corresponding sectional view with the board in an intermediate position.

Fig. 4

a cross section through two needle beds of a second flat knitting machine with opposing boards.

The sectional view in Fig. 1 shows an apparatus 100 of a flat knitting machine for holding down and forming stitches. From the flat knitting machine, a needle bed 4 is shown in the needles 7 are guided longitudinally displaceable in grooves 41 . The groove bottom is marked 42 . At the front end, the needle bed 4 grooves 43 for receiving board guide pieces 3 on which boards 1 are pivotally guided. The board guide pieces 3 have for this purpose a circular recess 31 into which a circular segment 14 of the board 1 engages. In this way, the circuit board 1 about the rotational axis 18 in the direction of arrow D and in the opposite direction D ' pivotally limited. The stop surface 33 of the sinker guide piece 3 limits the opening movement of the board 1 in the direction of arrow D and the surface 34, the movement down in the direction of arrow D '. The connection of the board guide pieces 3 with the needle bed via a wire 44 which extends over the entire length through the needle bed. The stitching wire 45 for the stitches is passed through slots 19 in all boards 1.

The circuit board 1 has a functional surface 11 for forming stitches, an active surface 12 for holding down loops of single-bed knitted fabrics and further active surfaces 13 , 13.1 , 13.2 for holding down loops of the opposing needle bed in double-bed knit fabrics in flat knitting machines with two needle beds. The pivoting movement of the board 1 in the direction of arrow D or D 'is triggered by a spring element 2 . This spring element 2 is guided in a cylinder disposed above the needle bed 4 slider bed. 6 For this purpose, the slide bed 6 has longitudinal grooves 61 into which the spring elements 2 are inserted. The spring element 2 has a U-shaped spiral spring section with legs 22, 24 . The free leg 24 is bent in the section 25 to the outside. With this section 25, the spring element 2 engages the circuit board 1. In the illustrated in Fig. 1 complete open position of the board 1, the section 25 is doing on the surface 16 of the board 1 at. In a pivoting movement of the board 1 in the direction D ', however, the surface 17 of the board 1 is acted upon by the spring element section 25. This is done by a displacement of the spring element 2 in the groove 61 , as also illustrated below in Figs. 2 and 3. The displacement is triggered by lock parts of the carriage of the flat knitting machine, which engage a foot 21 of the spring element 2. The slide bed 6 is connected via a connecting bar 5 with the needle bed 4. For this purpose, the connecting strip 5 has two dovetail-shaped sections 51, 52 which engage in correspondingly shaped grooves on the needle bed 4 and the slide bed 6, respectively. The displacement movement of the spring element 2 is limited by a wire 63 , which is guided in a slot 23 of the spring element 2. Via the section 25, a displacement movement of the spring element 2 is translated into a rotational movement of the board 1. In order to keep the required displacement movements of the spring elements 2 to trigger the required pivotal movement of the board 1 minimal, the portion 25 of the spring element 2 engages at a distance from the axis of rotation 18 of the board, which is less than the distance of the hold-down surface 12 to the axis of rotation 18th

Fig. 2 shows, in contrast to FIG. 1, in which the circuit board 1 is shown in its off-mode, the board 1 in its fully closed position in which it retains a mesh leg 9 of the needle 7 with the surface 12. The board 1 has been so far swiveled in the direction of rotation D 'until its surface 16 rests against a stop surface 34 of the blanking guide piece 3. The spring element has been moved to trigger this rotational movement of the board 1 in the direction of arrow X maximum forward. The section 25 of the spring element 2 now engages the surface 17. However, the board 1 can move in the direction of arrow D against the spring force of the spring element 2 limited move upwards. In Fig. 2, however, the position of the board 1 is shown for large meshes 9, which does not pull the board 1 against the spring force upwards. Should the stitch 9 detach from the surface 12, it could be recaptured by one of the surfaces 13 to 13.2.

Fig. 3, however, shows the arrangement of FIG. 2 while holding down small stitches 9. The board 1 has now been pivoted against the direction of the arrow D 'and against the force of the spring 2 upwards. The pivoting movement is limited by the spring element 2 itself. The free leg 24 of the U-shaped spiral spring portion is now on the leg 22 at. Another Nachobendrücken the board 1 through the mesh 9 is therefore excluded. Again, the additional surfaces 13 to 13.2 fulfill a backup function.

The spring element 2 is in the grooves 61 of the valve bed 6 with Friction led. This causes it in every slider position retains its position when the lock parts stop it apply. This allows all the spring elements 2 and so that the boards 1 in a defined pivot position being held.

4 shows in cross section a device 200 for holding down loops of a flat knitting machine with two needle beds 4, 4 '. Each of the needle beds is in the illustrated example with boards 1, 1 ', spring elements 2, 2' and knitting needles 7, 7 ', as shown in Fig. 1, equipped. This means that the device 101 for holding down stitches of the second needle bed 4 'is identical to the device 100 of the needle bed 4. For knitted fabrics whose stitches are formed on both needle beds 4, 4', ie so-called double-bed knitted fabrics, the effect of Hold-down surface 12, 12 ' limited. For safe hold down of the stitches in double-bed knitted fabrics, therefore, the board 1 of the front needle bed 4 additional functional surfaces 13, 13.1, 13.2 and the board 1 'of the rear needle bed 4' additional functional surfaces 13 ', 13.1', 13.2 ' on. These functional surfaces grasp the mesh legs 9 'of the stitches which are located on the shaft of the needles 7, 7' lying opposite them and hold them back when the needles 7, 7 ' carry out their advancing movement. In the example according to FIG. 4, the functional surface 13 of the board 1 of the front needle bed 4 has grasped the loop leg 9 'of the needle 7' of the rear needle bed 4 '.

Claims (5)

Circuit board (1, 1 ') of a flat knitting machine for holding down loops, characterized in that the board (1, 1') has a plurality of mesh holding surfaces (12, 12 ', 13, 13', 13.1, 13.1 ', 13.2, 13.2') , Circuit board according to claim 1, characterized in that the board (1, 1 ') has a mesh holding surface (12, 12') for single-bed knitted fabrics and at least one stitch-down holding surface (13, 13 ', 13.1, 13.1', 13.2, 13.2 ') for two-bed Knitted fabric. Circuit board according to claim 1 or 2, characterized in that the mesh retaining surfaces (12, 12 ', 13, 13', 13.1, 13.1 ', 13.2, 13.2') at different, equally or differently spaced peripheral locations of the boards (1, 1 ') are arranged. Circuit board according to one or more of the preceding claims, characterized in that the mesh retaining surfaces (12, 12 ', 13, 13', 13.1, 13.1 ', 13.2, 13.2') with respect to the axes of rotation (18) of the boards (1, 1 ') have a substantially radial orientation. Circuit board according to one or more of the preceding claims, characterized in that the circuit board (1, 1 ') has a functional surface (11) for forming meshes.

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