JP4022906B2 - Flat knitting machine sinker - Google Patents

Description

The present invention relates to a flat knitting machine sinker for lowering a stitch having a plurality of stitch lowering surfaces .

  Such sinkers for flat knitting machines are known, for example, from EP 0 387 797 and EP 0 424 717. The sinker of the flat knitting machine described in European Patent No. 02389797 is a stitch lowering element and an extruded piece of the stitch at the same time, and the sinker of the flat knitting machine described in European Patent No. 0424717 performs only the stitch lowering function. , Jointly with a stitch extrusion piece fixedly provided on the needle bed. However, both of these known flat knitting machine sinkers have the same disadvantages. That is, since both sinkers have only one stitch lowering surface, it is impossible to reliably lower the stitches of the one-needle bed knitted fabric and the two-needle bed knitted fabric.

  From French Patent No. 1207319 there is known a stitch extruding piece which has a stitch retaining key and is supported in a swingable manner. This swinging movement of the stitch extruding piece is introduced by a translationally movable sliding piece provided under the center of rotation and under the stitch retaining key. Even in this known stitch extruded piece having a stitch retaining function, a uniform and reliable stitch pulling function cannot be provided for the stitches of the one-needle bed and the two-needle bed knitted fabric.

  European Patent No. 0567282 shows a swingable stitch extruding piece having a stitch retaining key for a flat knitting machine driven by individual needles. The swinging motion of the stitch extruding piece is introduced by a sliding piece that translates. Since the sliding piece is frictionally coupled to the needle, only the movement in the same direction as the needle can be performed. Here again, the stitch retaining function is not changed according to the type of knitting, that is, the two-needle bed or the one-needle bed knitting.

  The problem on which the present invention is based is to improve the sinker of the flat knitting machine in such a way that it is possible to pull down the stitches of a one-needle bed or a two-needle bed knitting in an optimal manner.

This problem is that the sinker has one stitch lowering surface for one needle floor knitting and a plurality of stitch lowering surfaces for two needle floor knitting, and the stitch lowering surface for two needle floor knitting is used for one needle bed knitting. Thus it is solved in that provided above the stitch pull down surface. With this configuration, regardless of whether one needle bed knitted fabric or two needle bed knitted fabric is manufactured, one of the stitch lowering surfaces can assume the function of reliably lowering the stitch.

  In the two-needle bed knitted fabric, the stitches are pulled down by the stitch-lowering sinker of the needle bed facing the stitches. Therefore, in general, a different height position is required with respect to the gap of the tooth gap when the stitch lowering sinker lowers the stitches of its own needle bed. If a plurality of stitch lowering surfaces are provided, the sinker is suitable for both one-needle bed knitting and two-needle bed knitting.

  Furthermore, if the stitches are first released from the stitch lowering surface at the lowest point, the additional stitch lowering surface can also perform a fixing function. This stitch is then captured by one of the following faces. The risk of slipping off the stitch lowering surface is present with particularly large stitches. This is because the large stitch is in contact with the stitch lowering surface only by a slight tension.

The ambient knitting th reductions surface sinkers and are provided with the same or different spacing, it is advantageous.

Knitting th reductions surface can extend in the radius direction relative to the rotational axis of the sinkers.

  The rotation axis of the sinker can be provided as much as possible above the needle stem. This means also reliably improves the sinker stitch lowering function. This is because when the rotational axis is provided at a relatively large distance from the needle bed, the stitch lowering surface captures the stitch better at the lower swing position.

  In another configuration, the sinker can have a plurality of stitch down surfaces and at least one stitch extrusion surface. Therefore, the sinker combines the stitch lowering function and the stitch pushing function. In another variant, the sinker has only a plurality of stitch down surfaces and can cooperate with a piece fixedly provided on the needle bed.

  Two preferred sinkers according to the present invention will be described in detail below with reference to the drawings, as an embodiment in which a flat knitting machine is used.

  The cross-sectional view of FIG. 1 shows a stitch lowering and stitch pushing device 100 of a flat knitting machine. A needle bed 4 is shown in the flat knitting machine, and a needle 7 is guided in a groove 41 of the needle bed so as to be movable in the vertical direction. The groove bottom is labeled 42. The needle bed 4 has a groove 43 for receiving the sinker guide piece 3 on the front end surface, and the sinker 1 is guided by the sinker guide piece 3 so as to be swingable. For this reason, the sinker guide piece 3 has a circular notch 31, and the circular portion 14 of the sinker 1 fits into the notch 31. Thus, the sinker can swing around the rotation axis 18 in a range limited to the arrow direction D and the reverse arrow direction D ′. The swing motion is limited in the same manner by the sinker guide piece 3. The stopper surface 33 of the sinker guide piece 3 limits the opening movement of the sinker 1 in the arrow direction D, and the surface 34 limits the downward movement in the arrow direction D ′. The needle bed and the sinker guide piece 3 are connected through a wire 44 that extends through the needle bed over the entire length. The pull-down wire 45 for stitches is passed through the long holes 19 in all the sinkers 1.

  The sinker 1 has a functional surface 11 for stitch formation, that is, stitch extrusion, a working surface 12 for pulling down the stitch of one needle bed knitting, and needles facing each other in the case of a two-needle bed knitting in a flat knitting machine having two needle beds. It has a separate working surface 13, 13.1, 13.2 for lowering the floor stitches. The swinging movement of the sinker in the arrow direction D or D ′ is started by the spring element 2. The spring element 2 is guided by a sliding piece bed 6 provided above the needle bed 4. Therefore, the sliding piece floor 6 also has a vertical groove 61, and the spring element 2 is inserted into the vertical groove 61. The spring element 2 has a U-shaped bending spring portion having leg sides 22 and 24. The free leg side 24 is bent outward at a portion 25. The spring element 2 acts on the sinker 1 by this portion 25. In the fully open position of the sinker 1 shown in FIG. 1, the portion 25 hits the surface 16 of the sinker 1. On the other hand, when the sinker 1 swings in the direction D ′, the surface 17 of the sinker 1 receives the action of the spring element portion 25. This occurs due to the movement of the spring element 2 in the groove 61, as also shown in FIGS. This movement is started by a carriage cam of the flat knitting machine, and this cam acts on the butt 21 of the spring element 2. The sliding piece bed 6 is coupled to the needle bed 4 by a coupling bar piece 5. For this reason, the connecting bar 5 has two bevel-shaped portions 51 and 52, which are in the needle bed 4 and the sliding piece floor 6 and fit into appropriately formed grooves. The movement of the spring element 2 is limited via a wire 63 that is passed through the elongated hole 23 of the spring element 2. The moving motion of the spring element 2 is converted into the rotational motion of the sinker 1 via the part 25. In order to minimize the movement of the spring element 2 necessary to initiate the necessary movement of the sinker 1, the portion 25 of the spring element 2 has a smaller distance than the distance between the stitch pull-down surface 12 and the rotation axis 18 of the sinker 1. It acts on the sinker 1 with respect to the rotation axis 18.

  Unlike FIG. 1 in which the sinker 1 is shown in the non-operating position, FIG. 2 shows the sinker 1 in a fully closed position, in which the stitch pull-down surface 12 of the sinker 1 pulls the stitch 9 of the needle 7. Detained. Therefore, the sinker 1 is swung in the rotational direction D ′ until the surface 16 abuts against the stopper surface 34 of the sinker guide piece 3. In order to start this rotational movement of the sinker 1, the spring element 2 is moved forward in the direction of the arrow X to the maximum. The part 25 of the spring element 2 now acts on the surface 17. However, the sinker 1 can move upward in a limited direction in the arrow direction D against the spring force of the spring element 2. However, FIG. 2 shows the position of the sinker 1 with respect to the large stitch 9, and the sinker 1 does not pull the stitch 9 upward against the spring force. If the stitch 9 may come off the stitch pulling surface 12, the stitch 9 could be captured again by one of the surfaces 13 to 13.2.

  On the contrary, FIG. 3 shows the device according to FIG. 2 when pulling down the small stitch 9. The sinker 1 is now swung upward against the force of the spring 2 in the opposite direction of the arrow D ′. The swinging movement is limited by the spring element 2 itself. The free leg side 24 of the U-shaped bending spring 2 is now in contact with the other leg side 22. Therefore, further pushing up of the sinker 1 by the stitch 9 is prevented. Again, the additional surfaces 13 to 13.2 serve a fixing function.

  The spring element 2 is guided with friction in the groove 16 of the sliding piece floor 6. Thus, when the cam no longer acts on the spring element 2, the spring element maintains its position at each sliding piece position. As a result, all the spring elements 2 and thus the sinker 1 can also be held in a predetermined swing position.

  FIG. 4 shows a stitch lowering device 200 of a flat knitting machine having two needle beds 4 and 4 ′. In the illustrated example, each of the needle beds is provided with sinkers 1, 1 ', spring elements 2, 2' and needles 7, 7 'as shown in FIG. This means that the stitch lowering device 101 of the second needle bed 4 ′ is the same as the stitch lowering device 100 of the needle bed 4. In a knitted fabric in which stitches are formed by both needle beds 4, 4 ', that is, a so-called two-needle bed knitted fabric, the operation of the stitch pull-down surfaces 12, 12' is limited. Therefore, in order to reliably pull down the stitches in the two-needle bed knitted fabric, the sinker 1 of the front needle bed 4 has additional functional surfaces 13, 13.1, 13.2, and the sinker 1 'of the rear needle bed 4' It has additional functional surfaces 13 ', 13.1', 13.2 '. These functional surfaces capture the stitch 9 'on the needle stem of the opposing needle 7, 7' and hold the stitch 9 'when the needle 7, 7' moves forward. In the example according to FIG. 4, the functional surface 13 of the sinker 1 of the front needle bed 4 captures the stitches 9 ′ of the needles 7 ′ of the rear needle bed 4 ′.

  2 shows a cross section of a needle bed of a first flat knitting machine with a sinker in a fully open position.   2 shows a cross section of the needle bed of a first flat knitting machine with a sinker in a fully closed position.   2 shows a section of a first flat knitting machine with a sinker in an intermediate position.   2 shows a cross section of two needle beds of a second flat knitting machine with opposing sinkers.

Explanation of symbols

1,1 'sinker 4, 4' needle bed 12, 12 ', 13, 13', 13.1, 13.1 ', 13.2, 13.2' stitch lowering surface

Claims (4)

The sinker (1, 1 ' ) of the flat knitting machine for lowering the stitches has a plurality of stitch lowering surfaces (12, 12', 13, 13 ', 13.1, 13.1', 13.2, 13.2). ′) , The sinker (1, 1 ′) has one stitch lowering surface (12, 12 ′) for one needle bed knitting and a plurality of stitch lowering surfaces (13, 12) for two needle bed knitting. 13 ', 13.1, 13.1', 13.2, 13.2 ') and the stitch lowering surface (13, 13', 13.1, 13.1 ', 13. 2, 13.2 ') is provided above the stitch pull-down surface (12, 12') for a single-needle floor knitted fabric. Hen eyes lowered surface (12, 12 ', 13, 13', 13,1,13.1 ', 13.2,13.2') is, in the ambient of the sinkers (1, 1 '), the same or The sinker according to claim 1, wherein the sinkers are provided at different intervals . Knitting eyes pulled surfaces (12, 12 ', 13, 13', 13.1,13.1 ', 13.2,13.2') is, with respect to the rotational axis of the sinkers (1, 1 ') (18) characterized in that it extends in the radius direction Te, sinker according to claim 1 or 2. Characterized in that the sinkers (1, 1 ') has a functional surface (11) for forming the stitches, sinkers according to one of claims 1 to 3.

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