EP1619282A1 - Needle for a stitchforming system - Google Patents

Abstract

The needle body (2) has a hook (3) at the end, with a locking section (4) sliding on it and swinging in at least one of its positions. Between control plate (6) and control section (15) there is a coupling which can be controlled. The locking section (4) is guided by its cam slot (16) on a peg (18) bearing. When the closure section (14) opens the hook, it retreats into a slot (13) in the needle. The control plate is mounted to slide relative to the length of the needle. It is mounted to move back and forth on the needle. The cam track has a straight path (19) and a side section (21) forming with the peg (18) a swinging bearing for the closure section. The closure section is spring- (32) loaded in a given direction.

Description

The invention relates to a needle for a stitch-forming system, in particular for a knitting system.

Needles for stitch-forming systems, such as knitting machine needles, usually have a base body with a shaft and a hook formed on the shaft, wherein the hook interior can be opened and closed by a suitable closing member. As closing members, for example, pivotally mounted tongues or slides are in use, which are mounted longitudinally displaceable on the needle. The slider of a slider needle is provided with a foot which engages with a lock, so that the opening and closing movement can be performed in a controlled manner. The slider goes through a considerable stroke.

There are latch needles in which the tongue is freely movable. In addition, latch needles are known in which the tongue movement is controlled by a spool. Such a latch needle is known from WO 00/34560. This latch needle has a closing lever designed as an angle lever, one arm of which forms a closing section while the other arm is connected to a control slide and thus forms a control section. Depending on the position of the slide, the closing section can be moved into a first position in which it is outside the hook and releases the interior space. In another slide position, the closure tip is exactly at the tip of the hook. In a further slide position, the closing portion lies in a notch formed on the hook base and thus in turn releases the hook. However, the greater part of the closing portion protrudes from the notch.

This needle requires a slotted hook tip to allow the closure portion to move through the hook tip. This leads to extremely sharp and therefore sharp-edged structures at the tip of the hook. In addition, there is the danger that the closing portion abuts or gets stuck even at the slightest lateral clearance when passing through the bifurcated hook tip on the hook tip or rubs. This excludes the application of this principle in needles, which are intended for a particularly fine division.

On this basis, it is an object of the invention to provide a needle with externally controlled closing member. This control should be possible with a short-stroke actuating movement.

• Die erfindungsgemäße Nadel ist für Stricksysteme vorgesehen und eignet sich auch für den Einsatz in anderen maschenbildenden Maschinen (Wirkmaschinen) oder z.B. in Rundstrickmaschinen. Das Schließglied kann sowohl eine Schwenkbewegung als auch eine Schiebebewegung ausführen. Mit der kombinierten Schiebe-Schwenkbewegung gelingt es, den Hakeninnenraum vollständig zu öffnen und freizugeben, wobei dazu lediglich eine kurze Schließgliedtranslation und eine geringe Schließgliedschwenkbewegung kombiniert erforderlich sind. Dazu reicht eine kurze Bewegung einer Steuerplatine oder eines sonstigen Steuerelements aus. Der Betätigungshub des Steuerelements ist geringer als bei einer Schiebernadel. Dies wird dadurch erreicht, dass das Schließglied zwei Bewegungsfreiheitsgrade hat. In diesem Sinne ist es zweidimensional, d.h. mit zwei Bewegungskomponenten bewegbar.

This object is achieved by the needle according to claim 1:

• The needle according to the invention is intended for knitting systems and is also suitable for use in other stitch-forming machines (knitting machines) or, for example, in circular knitting machines. The closing member can perform both a pivoting movement and a sliding movement. With the combined sliding pivoting movement, it is possible to completely open and release the hook interior, with only a short closing element translation and a small closing element pivoting movement combined being required for this purpose. For this purpose, a short movement of a control board or other control is sufficient. The actuating stroke of the control is less than a slider needle. This is achieved in that the closing member has two degrees of freedom of movement. In this sense, it is two-dimensional, ie movable with two components of movement.

Furthermore, it succeeds with the pivoting movement to sink the closing member in a slot adjacent to the hook, so that the mesh lying in the hook can be transferred to the closing member with a short-stroke movement. Thus, the needle according to the invention requires in the Meshing smaller Axialhübe than it is the case with conventional needles or even with conventional latch needles.

Due to the axial translational movement of the closing member, no overlap occurs between the movement curve of the closing member end and the hook. The tip of the hook does not have to be forked. Nevertheless, the closure member may be both in a position below the hook tip as well as in a position above the hook tip. This opens the way to a miniaturization of the needle, so that the finest divisions are achievable. In addition, high operating speeds and higher system numbers (for example in circular knitting) can be achieved.

It is considered advantageous if the closing member is a slider having a closing portion, wherein the needle body has a receiving slot into which the closing portion can penetrate releasing the hook interior. If the closing portion of the hook interior is at least temporarily completely absorbed, lying in the hook interior mesh unhindered, for example, to a arranged near the hook abutment shoulder, which is then received by the closure member, as it pivots out of the receiving slot.

The closure member is preferably provided with a control portion which engages a control member. The control is, for example, a control board whose movement is controlled by a lock. It however, it may also be considered to directly engage the control section with a lock.

The control board is preferably slidably mounted with respect to the needle longitudinal direction, and it may also be pivotally mounted to move away from or approach the needle. The movement of the control board then has two components. This movement can be used in conjunction with a controllable coupling means to switch between translational movement and pivotal movement of the closing member. The controllable coupling means can be formed for example by a fork-like design of the control board on the one hand and by two provided on the control section of the closing member, spaced-apart investment means, of which, depending on the position of the control board optionally only the outer or both lie in the fork-like receptacle.

Furthermore, it is considered advantageous to store the closing member in a slotted guide. This includes, for example, a formed on the closing member longitudinal slot, which has a more or less straight portion for determining the translational movement and a side branch. Furthermore, the sliding guide includes a bearing means (axle, shaft, pin) which engages transversely through the relevant slot of the closing member. The side branch of the longitudinal slot of the closing member can serve as a hinge bearing for the pivotal movement of the closing member. In order to favor the engagement of the axle in the side branch, a spring element may be provided on the needle. This is preferably oriented and arranged so that it Locking element is biased to the locking of the side branch on the axle.

In an alternative embodiment, the slide guide can be conversely formed so that the slot for the longitudinal guide of the closing element together with side branch is formed on the needle while the closing member engages with a corresponding projection in this slot. Corresponding slots may be formed on both sides of the closing member in corresponding cheeks of the needle, between which the closing member is held. Protrusions projecting away from the flat sides of the closing element then run in these slots.

Further details of advantageous embodiments are the subject of the drawing, the description or claims.

Figur 1

die erfindungsgemäße Nadel nebst Schließglied und Steuerelement in Translationsposition in schematisierter Seitenansicht,

Figur 2

die Nadel nach Figur 1 mit Steuerplatine in Schwenkposition in schematisierter Seitenansicht,

Figur 3

eine etwas detailliertere schematisierte Darstellung der Nadeln nach Figur 2 in teilweise geschnittener Seitenansicht und in einer nicht maßstäblichen vergrößerten Darstellung und

Figur 4 bis 8

die Nadel nach Figur 1 bis 3 in verschiedenen Arbeitsstadien zur Veranschaulichung der Maschenbildung in schematischer Darstellung.

In the drawing, an embodiment of the invention is illustrated. Show it:

FIG. 1

the needle according to the invention together with closing element and control element in translational position in a schematic side view,

FIG. 2

the needle of Figure 1 with control board in pivoting position in a schematic side view,

FIG. 3

a somewhat more detailed schematic representation of the needles of Figure 2 in a partially sectioned side view and in a not to scale enlarged representation and

FIGS. 4 to 8

the needle of Figure 1 to 3 in different stages of work to illustrate the stitch formation in a schematic representation.

FIG. 1 illustrates a needle 1 which may be provided as a machine knitting needle, for example on a circular knitting machine. The needle 1 includes a needle body 2 with a hook 3 formed on the end side and a locking member 4 mounted on the needle body 2. In addition, the needle 1 is assigned a control board 6 as a control 5.

The needle body 2 is a flat body, for example, with a straight narrow needle back 7, as narrow straight needle top 8 and extending therebetween preferably flat side surfaces, of which in Figure 1, only one side surface 9 is visible. Starting from this substantially uniform cross section of the needle body 2, this has in the vicinity of the hook 3, a step 11, starting from which the height of the needle body 2 is reduced to the hook 3 out. The entire space bounded by the hook 3 and the step 11 serves for stitch formation. He is referred to here as a hook space 12.

The needle body 2 is provided with a slot 13 which begins approximately in the middle of the hook space 12 and extends across the step 11 away from the hook 3. The slot 13 is bounded by two flat cheeks belonging to the needle body 2. In the slot 13 sits the closing member 4, which is designed in the manner of an angle lever. One arm of this lever forms a closing portion 14 while the other arm forms a control portion 15.

For storage of the closing member 4 in the slot 13 is a link guide 16, to which a formed in the closing member 4 guide slot 17 and a Closing member 4 in the guide slot 17 transverse axis 18 through. The guide slot 17 is divided into a preferably substantially straight and approximately parallel to the closing portion 14 oriented guideway 19 and a preferably adjacent to one end of the guide track 19 side branch 21. In the present, preferred embodiment, the side branch 21 branches off at the front end, ie the end closest to the hook 3, from the guide track 19 in the direction of the needle back 7. The side branch 21 and the guide track 19 preferably have a width that matches the diameter of the axle 18 except for a slight play.

The control section 15 is engaged with the control board 6. This has for this purpose a fork-like recess 22. The control board 6 is a flat body whose thickness substantially coincides with the thickness of the needle body 2. With its narrow bottom 23, the control board 6 is located on the needle top 8. In this case, the underside 23 has, for example, an obtuse angle 24 which permits a tilting of the control board 6 between the position illustrated in FIG. 1, on the one hand, and the position illustrated in FIG. The control board 6 can thus rock back and forth between two positions. Both for determining the rocking position and the axial displacement with respect to. The needle longitudinal direction L may be formed on the control board 6, one or more control feet 25, 26, for example, with a needle lock a knitting machine engaged and thus cause the movement of the control board 6. Incidentally, the needle 1 is also in engagement with, for example, the lock of a knitting machine via a foot not further illustrated.

The recess 22 forms with a corresponding contour of the control section 15, a coupling means 27, to which except the recess 22 a formed on the control section 15, in side view disc-shaped head 28 and a spaced from the head 28 rectangular section 29 belong. Between the rectangular section 29 and the head 28, a narrower web 31 is formed. The width of the rectangular section coincides with the diameter of the head 28. This dimension is such that both the head 28 and the rectangular portion 29 fit into the recess 22 with a small clearance.

FIG. 3 illustrates further details. Thereafter, a spring 32 is housed in the slot 13, which is formed as a narrow in the tongue slot 13 movable leaf spring. It is supported with its two ends 33, 34 in corresponding seats 35, 36, which are formed in the tongue slot 13. It is bent to the axis 18, which is approximately centrally above the spring 32. It presses with its central portion 37 from below against the closing member. 4

• Die Länge des Schließabschnitts 14, gemessen zwischen dem vorderen Ende 38 der Führungsbahn 19 bzw. dem Seitenzweig 21 und dem vorderen Ende 39 des Schließabschnitts 14, ist geringer als der Abstand der Achse 18 von dem vorderen hakenseitigen Ende des Zungenschlitzes 13. Dadurch kann der Schließabschnitt 14 vollständig in den Schlitz 13 eintauchen. Des Weiteren ist der Abstand zwischen dem Ende 39 und dem hinteren, d.h. von dem Haken 3 abliegenden, Ende 45 der Führungsbahn 19 größer als der Abstand der Achse 18 von der Hakenspitze 3, wie ein Vorgriff auf Figur 4 zeigt. Zusätzlich zweigt der Seitenzweig 21 nicht rechtwinklig von der Führungsbahn 19 ab. Vielmehr ist zwischen dem Seitenzweig 21 und der Führungsbahn 19 ein stumpfer Winkel 42 ausgebildet. Des Weiteren ist der Seitenzweig 21 vorzugsweise kürzer als der Durchmesser der Achse 18. Damit wird erreicht, dass die Achse 18 leicht aus dem Seitenzweig 21 ausrastet, wenn das Schließglied 4 von der Steuerplatine 6 einen Längsschub erhält.

Needless to say, the needle 1 described in principle has the following features, which can be seen in particular with reference to FIG. 3:

• The length of the closing portion 14, measured between the front end 38 of the guide track 19 and the side branch 21 and the front end 39 of the closing portion 14 is less than the distance of the axis 18 from the front hook-side end of the tongue slot 13 Closing portion 14 completely immersed in the slot 13. Furthermore, the distance between the end 39 and the rear, that is remote from the hook 3, end 45 of the guide track 19 is greater than the distance of the axis 18 of the hook tip 3, as an anticipation of Figure 4 shows. In addition, the side branch 21 does not branch off at right angles from the guide track 19. Rather, an obtuse angle 42 is formed between the side branch 21 and the guide track 19. Furthermore, the side branch 21 is preferably shorter than the diameter of the axis 18. This ensures that the axis 18 easily disengages from the side branch 21 when the closing member 4 receives a longitudinal thrust from the control board 6.

Furthermore, can be dispensed with the stage 11. A formed between the closing portion 14 and the rectangular portion 29 on the closing member 4 throat 43 can take over their function.

• Figur 4 veranschaulicht die Nadel 1 mit einer in dem Haken 3 noch nicht abgeschlagenen Masche 44. Das Schließglied 4 befindet sich in seiner am weitesten vorgeschobenen Position. Die Achse 18 berührt ein hinteres Ende 45 der Führungsbahn 19. Das Ende 39 des Schließabschnitts 14 ruht an der Spitze des Hakens 3. Das Schließglied 4 ist dabei unverschwenkbar gehalten. Die Steuerplatine 6 ist so weit an den Nadelkörper 2 angenähert, dass sowohl der Kopf 28 als auch der Rechteckabschnitt 29 in der Ausnehmung 22 liegen. Der Steuerabschnitt 15 ist somit nicht gegen die Platine 6 verschwenkbar. Eine Axialbewegung der Platine 6 in Nadellängsrichtung L (Figur 1) überträgt sich als Schiebebewegung auf das Schließglied 4.

The needle 1 described thus far operates as follows with reference to FIGS. 4 to 8:

• Figure 4 illustrates the needle 1 with a not yet severed in the hook 3 mesh 44. The closure member 4 is in its furthest advanced position. The axis 18 contacts a rear end 45 of the guide track 19. The end 39 of the closing portion 14 rests at the tip of the hook 3. The closing member 4 is held unschwenkbar. The control board 6 is so far approximated to the needle body 2 that both the head 28 and the rectangular portion 29 are located in the recess 22. The control section 15 is thus not against the board 6 pivotable. An axial movement of the board 6 in the needle longitudinal direction L (FIG. 1) is transferred as a sliding movement to the closing element 4.

In order to open the hook space 12, the control board 6 can be displaced away from the hook 3 relative to the needle body 2. The result of such a movement illustrated in Figure 5. The hook space 12 is now open, wherein the closing portion 14 still projects into the hook space 12. If the withdrawal of the control board 6, the front end 38 of the guide rail 19 has arrived at the axis 18 (Figure 5) presses the spring 32, not further illustrated in Figures 4 to 8, the closing member 4 slightly upward, so that the side branch 21 of Guide slot 17 on the axis 18 engages.

Now, if the mesh 44 is transferred to the back of the closing portion 14 of the closing portion 14 is first completely sunk in the slot 13. For this purpose, the circuit board 6, as illustrated in FIG. 6, is moved somewhat away from the needle 1 or the needle body 2. The movement is just so far that even the head 28 but not the rectangular section 29 is seated in the recess 22. This can be done for example by the rocking movement of the control board 6, which can be seen by comparing Figures 1 and 2. Thus, the coupling means 27 is switched from a non-rotatable rigid coupling for transmitting the longitudinal sliding movement to a hinge connection between the control section 15 and the control board 6. If the control board 6 now experiences a short forward movement towards the hook 3, as shown in FIG. 2 or 6, the closing section 14 is sunk in the slot 13. The axis 18, the has been used as a straight guide for the closing member 4, is now the pivot center of the closing member 4. The mesh 44 can now, as Figure 6 illustrates, for example, slide up to the stage 11. It is located above the closing portion 14th

In the next step, illustrated in FIG. 7, the control board 6 is first pulled back so far that the longitudinal direction of the control section 15 is approximately aligned with the longitudinal direction of the opening 22. During this pivoting movement of the control section 15, the closing section 14 is lifted out of the slot 13. Then, the control board 6, as illustrated in Figure 7, are approximated to the needle 1, so that the closing member 4 is again rotatably coupled to the control board 6. In the meantime, the hook 3 may have picked up a newly inserted thread 46. Now, the control board 6 forward, i. moved towards the hook 3, the position shown in Figure 8 is finally reached. The end 39 of the closing member 4 abuts against the hook 3. The hook space 12 is closed. The mesh 44 can slide over the hook 3. This process is called knocking off.

A needle 1, in particular a machine knitting needle, for example for use in circular knitting machines, has a closing element 4, which is mounted so as to be both pivotable and longitudinally displaceable. The movement of the closing member is externally controlled by a control 5. The needle 1 according to the invention comes with particularly short strokes both for the needle 1 and 5 for the control. It is robust and is suitable, among other things, for particularly fine pitches and for higher system numbers in circular knitting machines.

Reference numerals:

1

needle

2

needle body

3

hook

4

closing member

5

control

6

control board

7

needle back

8th

Needle top

9

side surface

11

step

12

hook space

13

Slot, tongue slot, slide slot

14

closing portion

15

control section

16

link guide

17

guide slot

18

Bearing means, axle, shaft, pin

19

guideway

21

side branch

22

recess

23

bottom

24

corner

25, 26

tax feet

27

coupling agent

28

head

29

rectangular section

31

web

32

feather

33, 34

end up

35, 36

seats

37

section

38, 39

The End

42

corner

43

throat

44

mesh

45

The End

46

thread

L

Needle longitudinally

Claims (10)

Needle (1) for a stitch forming system, in particular for a knitting system,
with a needle body (2), at whose end a hook (3) is formed, and
with a closing member (4), which is displaceably mounted on the needle body (2) and also pivotable in at least one sliding position. Needle according to claim 1, characterized in that the closing member (4) has a closing portion (14), and that the needle body (2) has a slot (13) into which the closing portion (14) is immersed releasing the hook space (12) can. Needle according to claim 1, characterized in that the closing member (4) has a control portion (15) which engages with a control member (5). Needle according to claim 3, characterized in that the control element (5) is a control board (6). Needle according to claim 4, characterized in that the control board (6) is displaceably mounted with respect to the needle longitudinal direction (L). Needle according to claim 4, characterized in that the control board (6) is mounted on the needle (1) to and away from the latter. Needle according to Claim 4, characterized in that a controllable coupling means (27) is arranged between the control plate (6) and the control section (15). Needle according to claim 1, characterized in that the closing member (4) by means of a slotted guide (16) is mounted. Needle according to claim 8, characterized in that the slotted guide (16) has a straight guideway (19) and a side branch (21) which, together with one of the needle body (2) bearing means (18) as a pivot bearing for the closing member (4 ) serves. Needle according to claim 1, characterized in that the closing member (4) is biased by a spring means (32) in a predetermined direction.

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