JP6416341B2 - Warp knitting machine and method for producing warp knitted fabric - Google Patents

Description

The present invention is a warp knitting machine including a knitting needle, a yarn introduction needle, and a sinker assembly having a knock over edge and a down holder, wherein the knitting needles are arranged side by side in the width direction, and the yarn introduction needle has a width. The present invention relates to a warp knitting machine that is arranged side by side along a direction and in which a sinker assembly is arranged side by side along a width direction.
The present invention is also a method for producing a warp knitted fabric in which a yarn of a yarn group is guided to a knitting needle by a yarn introduction needle, wherein the down holder holds the yarn group above the loop after the knockover. It further relates to the way to go through.

  Some warp knitting machines have various structures, which differ particularly in the direction of take-out of the fabric. The fabric, that is, the warp knitted fabric to be manufactured is taken out almost linearly or at a large oblique angle with respect to the yarn to be fed, and the warp knitted fabric being taken out is formed in a process of forming a new loop. When the knitting needle is raised, the warp is received by the head of the knitting needle while holding the formed loop on the knitting needle. This type of cloth take-out technique is particularly used in Raschel knitting machines, but the warp knitted fabric obtained is relatively rough and feels uncomfortable when worn directly. .

  If the warp knitted fabric is taken out at a small angle with respect to the yarn being fed, for example in an automatic warp knitting machine, the loop must be held so that the knitting needle can rise without pulling up the loop. Don't be. In this case, a knock-over edge, that is, a so-called locking knock-over sinker having a molding locking portion and a down holder are used. When the knitting needle is raised, the down holder keeps the loop on its shaft with its underlay.

  The present invention is based on the object of presenting further possibilities for producing warp knitted fabrics.

  In the warp knitting machine of the type described at the beginning, this purpose is that the sinker assembly has a knock-over sinker and a down-holder that is separate from the knock-over sinker, and the knock-over sinker and the down holder have their respective operating paths. This can be achieved by being able to move in different motions in at least a portion of.

  By using the design structure of an embodiment of this type, a warp knitted fabric that could originally be manufactured only by using a so-called Raschel knitting machine can now be manufactured with a relatively low tension. Therefore, it can be produced only by using, for example, a Raschel knitting machine. Therefore, a lace fabric having a high tension and a rough feel can be produced from a new warp knitting machine. This is possible by moving the knockover sinker and the down holder at least temporarily separately from each other. In other areas of the movement path, the knockover sinker and the down holder can move together. This will be described later.

  Preferably, the down holder driving unit acts on the down holder in the width direction. By using the down holder driving unit, the down holder can be rearranged in the width direction with respect to the knock over sinker. The rearrangement along the width direction is also referred to as “offset along the side surface direction”. When the down holder is offset in the lateral direction, that is, when it is rearranged along the width direction, the down holder moves the yarn by that amount. In this way, the down holder produces a temporary underlay effect.

  Preferably, the down holder driving unit has a driving stroke in the width direction. This driving stroke displaces the position of the down holder from the collision-free region between the two knitting needles to the collision-free region between the other two knitting needles. The pitch length of the knockover sinker and the down holder matches the pitch length of the knitting needle. In the initial position, the knockover sinker and the down holder are arranged in a needle channel between the knitting needles. The knitting needle can also be called an “actuating needle”. The down holder is rearranged along the side direction, and this side direction rearrangement is an integral multiple of the pitch length between the knockover sinker and the knockover sinker or the pitch length between the knockover sinker and the knockover sinker. If they match, the thread acted on by the down holder is also laterally multiplied by an integer multiple of the pitch length between the knockover sinker and the knockover sinker or the pitch length between the knockover sinker and the knockover sinker. Will be deflected along. Therefore, a so-called artificial underlay is formed between two adjacent loops. If the knitting needle can move between the down holder and the down holder without collision, the drive stroke may not match the exact value of the pitch length described above.

  Preferably, the down holder drive is adapted to reposition the down holder in a linear thread path between the yarn introduction needle and the knitting needle in each case. In this way, the down holder can continue to hold the yarn on the knitting needle shaft when the knitting needle is raised so that the knitting needle can be raised after the down holder is repositioned along the lateral direction. This linear thread path can be disturbed as possible. As a result, a knitted fabric that is relatively free of tension can be manufactured.

  Preferably, the knockover sinker and / or the down holder has at least a part of the molding locking portion. The other part of the molding locking part can be provided on the down holder or the knockover sinker. As a result, an embodiment design structure similar to a conventional locking knockover sinker is at least part of the loop formation process.

  Preferably, the down holder driving unit is synchronized with the knitting needle drive so that the down holder driving unit offsets the down holder along the width direction before the knitting needle drive raises the knitting needle. Thus, the down holder is first offset along the lateral direction, and then the knitting needle is raised while the down holder holds the yarn.

  In the case of the method of the type described at the beginning, the above-mentioned purpose is to use a down holder that is separate from the knock over sinker, offset the down holder along the lateral direction without the knock over sinker, and then remove the knitting needle. It can be achieved by raising it.

  As mentioned above, in this way, it is possible to produce a knitted fabric with low tension that could be originally designed in the same way that it could only be done with a Raschel knitting machine until now. Become. For example, fringes (tufts) can be manufactured with very low tension.

  For this reason, it becomes possible to manufacture a knitted fabric using relatively thin yarns, and as a result, in many cases, a completely new tactile sensation and / or appearance can be obtained.

  Preferably, the down holder is adapted to disturb the linear thread between the yarn introduction needle and the knitting needle in each case. Thus, the yarn is no longer straight.

  It is also advantageous for the down holder to be offset along the lateral direction from a position in the collision-free area between the two knitting needles to a collision-free area between the other two knitting needles. The down holder is then repositioned from the needle channel between the knitting needles to the other needle channel so that the down holder does not interfere with the knitting needles when the knitting needles are raised.

  Preferably, when forming the underlay, the down holder keeps a portion of the yarn offset along the lateral direction. In this way, so-called artificial underlay formation is achieved.

  Preferably, when the down holder passes through the yarn group, the knockover sinker moves together with the down holder. This movement is performed at right angles to the width direction. This movement of the knock over sinker forms a sinker loop on each yarn.

  Preferably, when the knitting needle is lowered, the knockover sinker and the down holder are returned. This movement can be performed at the last stage of the downward movement of the knitting needle. The knockover sinker and down holder are then placed in their initial positions prior to the next loop formation cycle.

In the following, the invention is described using preferred exemplary embodiments with reference to the drawings.
It is the schematic which shows a part of warp knitting machine. It is the schematic which shows a part of warp knitting machine. It is a perspective view which shows the part in a part of loop formation process. FIG. 3 is a diagram showing the element described in FIG. 2 without a thread. It is a figure which shows the 3rd step of a loop formation process. It is a figure which shows the 4th step of a loop formation process. It is a figure which shows the 5th step of a loop formation process. It is the schematic similar to FIG. 1 which shows the components of a warp knitting machine.

  1a and 1b show the parts of a warp knitting machine, in particular a yarn introduction needle 1 configured here as a needle having a hole for guiding a yarn 2, a knitting needle 3, also called a "working needle", a knockover sinker 4 and a down The holder 5 is shown schematically.

In FIG. 1a, the knockover 4 is shown schematically. Here, it is assumed that the knockover is performed at a rotation angle of 0 ° of the main shaft (not shown) of the warp knitting machine.
FIG. 1b shows an embodiment of parts of a warp knitting machine that are slightly modified with respect to FIG. 1a.

  In the case of the design structure of the embodiment described in FIG. 1 a, the molding locking part 7 is configured as part of the knockover sinker 4. In the case of the design structure of the embodiment described in FIG. 1 b, the molding locking part 7 is configured as a part of the down holder 5. The locking required when the knitting needle 3 is raised is achieved by the interaction between the knockover sinker 4 and the down holder 5.

  In the loop forming step, the knitting needle 3 moves up and down (in the case of FIGS. 1a and 1b). The yarn introduction needle 1 is adapted to move along the direction perpendicular to the drawing twice from left to right or from right to left and between them (in the case of FIGS. 1a and 1b). The knockover sinker 4 and the down holder 5 move in the direction of a double-headed arrow 6. The down holder 5 forms a separate component from the knock over sinker 4, and the knock over sinker 4 is used for the loop knock over and for the locking function. In addition to movement in the direction, it is also possible to move in the direction perpendicular to the drawing. The down holder drive used for this purpose is not illustrated in detail. Similar to the drive of the bar to which the yarn introduction needle 1 is fixed, the drive of the down holder can be arranged at one end of the bar and act on the bar carrying the down holder 5 via the cam disk. It can be done.

FIG. 2 is a perspective view schematically showing the second step. The second step relates to “locking” that occurs at a rotation angle of 40 ° of the main shaft, for example.
When the loop is knocked over, the knockover sinker 4 and the down holder 5 move in a direction transverse to the width direction of the warp knitting machine. This moving direction is called “forward direction”. The down holder passes through the yarn group formed from the plurality of yarns 2. The knockover sinker 4 pushes the loop forward through the molding locking portion 7. This forward displacement forms a sinker loop. The knockover sinker 4 and the down holder 5 move together in the forward or backward direction in the direction of the arrow 8, that is, along the transverse direction with respect to the width direction. FIG. 3 further shows a dimension 9 for so-called “locking”. This dimension is derived from the space between the locking mold forming part 7 and the back of the knitting needle 3, that is, the surface of the knitting needle 3 facing the locking mold forming part 7.

  As can be seen from FIG. 2, the removal direction 10 is substantially the same as the movement direction illustrated by the arrow 8 of the knockover sinker 4 and the down holder 5. The take-out direction 10 extends in a direction substantially perpendicular to the average supply direction of the yarn 2. This angle may exceed 90 °. However, in any case, the angle is less than 180 °. Thus, no traction is added to the loop that results in extreme binding or solidification due to this removal.

  FIG. 2 further shows a knitting needle chest ridge 11 and a knitting needle head 12. Here, the knitting needle 12 is configured as a compound needle having a slide 17.

FIG. 4 shows the third step of the loop formation process, the displacement of the underlay.
As soon as the down holder 5 passes through the yarn group 2, the down holder 5 is offset in the lateral direction by at least one stitch pitch length of the knitting needle 3. The down holder 5 is arranged in the needle channel between the two knitting needles 3, that is, at the same position as the knockover sinker 4, as in the time point before the offset, that is, in the case of the initial position. The underlay of the fringe is displaced by the offset movement of the down holder 5, and the loop located on the shaft of the knitting needle 3 is pressed against the breast ridge 11 (see FIG. 2) of the rising knitting needle 3. ing. The offset of the down holder 5 and the displacement of the yarn and the temporary underlay caused thereby may be a single needle pitch length or a multi-needle pitch length. However, this case of this procedure does not necessarily result from the cross-linking of loop courses. The down holder offset movement is illustrated by arrow 14. However, the knockover sinker 4 remains in its original position along the width direction.

  FIG. 5 shows a fourth step in which overlay is performed. When the overlay is formed, the down holder 5 keeps the underlay in an appropriate position. In this way, the loop 13 wound around the knitting needle 3 is held while being pressed against the shaft of the knitting needle 3.

  FIG. 6 shows a fifth step in which the knitting needle 3 descends. When the knitting needle 3 descends, that is, when the knitting needle 3 moves from top to bottom, the down holder 5 moves backward (along the direction perpendicular to the drawing of FIG. 6). Moreover, the above-mentioned displacement is canceled and the underlay is released. The loop 13 described above can be knocked over, and for this purpose the knockover sinker 4 can have a further knockover device 15. The knockover device 15 is advantageous particularly when the loop 13 does not cross the knockover sinker 4 at the time of knockover (see FIG. 6). For this purpose, the knockover device 15 may be adapted to fill the channel between the knockover sinker 4 and the knockover sinker 4.

  Since the knockover sinker 4 is arranged along the same direction as the fringe traveling direction, the knockover of the knockover sinker 4 can be connected in the transverse direction that the loop 13 to be knocked over forms with respect to the newly formed loop. This can be achieved by the over device 15. FIG. 7 is a side view showing this step. The down holder 5 moves backward together with the knockover sinker 4, that is, along the arrow 16. This movement is performed together. The knitting needle 3 shown with the slide 17 can be passed through the “previous” loop 13.

  Since the loop does not need to be held on the shaft of the knitting needle 3 by a high traction force when the knitted article is taken out, the loop is held by the down holder 5, so that the warp knitted fabric is used with a relatively low tension (tension). Can be manufactured. As a result, a thin thread having a slight tensile strength can be used for production.

  For the reasons described above, it is also possible to manufacture lace fabrics that could only be manufactured with a Raschel knitting machine until now. Traditionally, this type of lace fabric has been manufactured using high tension and has a relatively rough feel. By using the down holder 5 that is movable along the lateral direction, that is, along the width direction, it is possible to produce warp knitted fabrics, for example lace fabrics, having a significantly lower tension.

  As described above, the offset movement of the down holder 5 for displacing the yarn may be one needle pitch length of the knitting needle 3 or a needle pitch length that is an integral multiple of the one needle pitch length of the knitting needle 3. There may be. The pitch length of the knitting needle 3 matches the pitch length of the down holder 5 and the pitch length of the knock over sinker 4. If the down holder 5 can move while avoiding a collision between the knitting needle 3 and the knitting needle 3, it is not necessary to keep the above-mentioned pitch length value exactly and match.

As can be seen from FIGS. 4 to 6 in particular, the linear yarn between the yarn introduction needle 1 and the knitting needle 3 is disturbed by the offset along the side surface direction of the down holder 5. As can be seen in particular in FIG. 4, this disturbance creates an artificial underlay in the yarn 2 at the intermediate distance 18.
In particular, a knockover device 15 is used so that the fringe can be knocked over.

The locking dimension 9 is a reference for the warp knitted fabric tension. It is possible to form a relatively loose sinker loop having a favorable effect on the feeling when touching the warp knitted fabric.
Since the artificial underlay is formed by the offset along the side surface direction of the yarn 2 caused by the down holder 5, a relatively loose fringe can be produced by the warp knitting machine.

Claims (13)

A warp knitting machine comprising a knitting needle (3), a yarn introduction needle (1), a sinker assembly having a knock over edge (15) and a down holder (5), wherein the knitting needle (3) is arranged in the width direction. In the warp knitting machine, wherein the yarn introduction needles (1) are arranged along the width direction, and the sinker assemblies are arranged along the width direction,
The sinker assembly includes a knockover sinker (4) and a down holder (5) separate from the knockover sinker (4);
A down holder driving unit for moving the knock over sinker (4) and the down holder (5) in respective operation paths;
The down holder driving unit acts on the down holder (5) along the width direction to change the position of the down holder (5) along the width direction with respect to the knock over sinker (4). A warp knitting machine characterized by being configured to allow   The down holder driving portion has the driving stroke in the width direction, and the driving stroke is positioned at the position of the down holder (5) in the collision-free region between the two knitting needles (3). The warp knitting machine according to claim 1, wherein the warp knitting machine is configured to be displaced to a collision-free region between the two. The warp according to claim 1 or 2 , characterized in that the down holder (5) and the knock-over sinker (4) are configured so that they can be repositioned along a transverse direction with respect to the width direction. Knitting machine. The down holder drive is configured to reposition the down holder (5) in a linear yarn path between the yarn introduction needle (1) and the knitting needle (3) in each case. The warp knitting machine according to any one of claims 1 to 3 , wherein The warp knitting machine according to any one of claims 1 to 4 , wherein the knockover sinker (4) has at least a part of a locking mold forming part (7). The warp knitting machine according to any one of claims 1 to 5 , characterized in that the down holder (5) has at least a part of a locking mold part (7). The down holder driving part is synchronized with the knitting needle drive so that the knitting needle drive raises the knitting needle (3) after the down holder driving part offsets the down holder (5) along the width direction. The warp knitting machine according to any one of claims 1 to 6 , wherein the warp knitting machine is configured as described above. A method for producing a warp knitted fabric in which a yarn (2) in a yarn group is guided to a knitting needle (3) by a yarn introduction needle (1), wherein the down holder (5) is a loop after knock-over. Passing through the yarn group above (13),
A down holder (5) which is a separate body from the knock over sinker (4) is used, and the knitting needle (3) after the down holder (5) is offset along the lateral direction without the knock over sinker. Is configured to be raised. 9. The method according to claim 8 , wherein the down holder (5) disturbs the linear yarn between the yarn introduction needle (1) and the knitting needle (3) in each case. When underlay forming method according to claim 8 or 9, characterized in that the down holder (5) is maintained to offset a portion of the yarn (2) laterally. The down holder (5) is offset along a lateral direction from one position of a collision-free area between two knitting needles toward a collision-free area between the other two knitting needles. The method according to any one of 8 to 10 . When the down holder (5) passes through the yarn group, to any one of claims 8 to 11 wherein the knock-over sinkers (4) is characterized in that it moves with the down holder (5) The method described. 13. A method according to any one of claims 8 to 12 , characterized in that the knockover sinker (4) and the down holder (5) return when the knitting needle (3) descends.

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