EP1039003B1 - Sliding tongue needle with split tongue - Google Patents

Description

The invention relates to a slide needle, in particular for use in stitch-forming textile machines.

For knitting machines and similar stitch-forming textile machines are pushpins in use, their hooks can be closed via a slide. The slider is managed and controlled separately so that it is on the hook can be moved to and away from it. On this way threads can be securely trapped in the hook become. The slider can also close the hook so that the stitch can slide over the hook. this The process is called knocking off. The slider is over pushed the hook out, can be transferred to the slider Stitches are taken over by other needles. This The process is called moving.

Stitch-forming textile machines must have the desired ones Form stitches with the highest reliability. To step even a few malfunctions is the quality of the manufactured textiles immediately impermissible. On the other hand, the stitch formation must be done at high speed run to make textile fabrics rational to be able to manufacture. The stitch formation process is allowed not go through despite the high speed Interferences are affected, as they result from changing Thread tensile forces, for example as a result of desired patterns, uneven thread thicknesses or other influences can originate.

After all, the needles should be one if possible subject to low wear, i.e. reliable in the long run work. In this way, maintenance and Limit downtimes to a not too large extent.

From the US-PS 1,673,634 is a needle with a split slide known. The slide is out two resilient thin sheets built up together are connected. They can be moved lengthways in one the slider slot provided the shaft of the needle. The slider slot begins near the hook. The two free ends protruding from the slider slot of the slider define a funnel which, if the Slider is pushed onto the hook, the tip of the Hakens picks up. For this, the two free ends of the Leg forming slider bent slightly away from each other. They are also designed so that they tend to be something to spring apart from each other when coming out of the slider slot come out.

It is an object of the invention to ensure operational safety to improve a slide needle.

This task is solved with a slide needle, which has the features of claim 1.

The slide needle according to the invention has a divided one or slotted slider. This slider is usually by two or more slide parts educated. Embodiments are also possible in which this slide is formed from a slotted part becomes.

The sliding parts or separated by a gap Areas of the slide are in the installed state of each other spring biased away. Not only do they spring the leg forming the funnel, but beyond also parts or areas adjoining the funnel. This is due to a resilient lateral bulge the slide parts reached that fixed elsewhere interconnected or integrally formed with each other could be. In the one following the funnel Area, however, they are not interconnected, to spring freely away from each other. The curvature of the Both slide parts are designed so that the immediately following the funnel of the slide Areas of the two slide parts on the flanks of the slider slot. The resulting right and left attachment point form management or storage points for the slider and center it.

The management and storage points are by the appropriate Bend the slide parts very close to that arranged free end of the slide. The slider is in Closed position, then the areas of the Slider, which form the attachment points, in the area of At the beginning of the slide slot. They are arranged in such a way that when the slider is in the transfer position, i.e. about the hook is pushed out, at least in sections come out of the slide slot. At a Embodiment reach the areas of the slide that form the contact points, the beginning of the slot when the slide is in the tee position. preferably, however, these areas reach the beginning of the slot already in the closed position of the slide.

Due to the special bending of the slide parts a small distance between the investment site and the achieved free end of the slide. This enables one precise guidance of the free end of the slide and thus the formation of a very narrow funnel. The precise The slide can be guided on or in the slide needle a safe location of the hook tip in the funnel, even if its mouth width is very small. Also at attacking laterally on the free ends of the slide Forces, for example through laterally acting thread tension the legs of the slide which define the funnel are not deflected so far that it closes when the hook is closed the tip of the hook would hit, reducing wear acts.

In addition, the narrow funnel enables the safe Slip the stitches over the hook when knocking what like the safe opening and closing of the slide Functional safety serves.

Another advantage arises from the possible Reduction of the funnel by improving the Guiding the slide in the slide slot. A smaller one Funnel allows the slide to run with little friction in the slide slot, especially when the funnel when the slide is pulled back into the slide slot entry. This in turn enables the slider slot to be interpreted relatively narrowly, i.e. that between the slider and to minimize existing channel play. A little Play in turn increases the positioning security and thus the functional safety of the slide needle.

Due to the bend of the slide parts according to the invention the slide is centered in the slide slot, i.e. guided in the middle. The slide stands with its two Slider parts with both flanks of the slider slot in Investment. The system is localized and defined. When the slide moves back and forth during the work of the slide needle both flanks of the slider slot continuously stripped. Dirt deposits are avoided and the Slider slot is kept clean. This also comes Functional safety of the slide needle benefits.

The two slide parts are preferably symmetrical trained to each other and are at the end or At the bottom of the funnel. This leads to the subsequent bulged sections of the To a certain extent support slide parts against each other twice, namely at the end of the funnel and at a lower one in the Slider slot lying point. This will make it sufficient Spring forces even with slight initial bends the slide parts reached. In addition, the slide parts be very thin.

The desired lateral deflection of the slide parts can be achieved by a single bend if necessary, which is located close to the funnel. The bending point roughly determines the management and storage location on Start of the slide slot. With a further improved Embodiment are two on each slide part Bends provided at a certain distance are arranged to each other. So it forms lateral bulge with a flat on the slide part out. The contact between the slide part and the flank of the slider slot becomes rather flat, causing wear on the slide due to material abrasion is reduced.

Another advantage of the embodiment with two Bending points for forming the deflection according to the invention is that the slider is beyond the hook be pushed into a transfer position (stitch transfer) can, without the two slide parts being too far spread apart.

The guidance of the protruding from the slide slot Slider tele is preferably in all positions the slide, i.e. both in open position and in Closed position, tee position or closed position or essentially at the beginning of the Slide slot. This way the length of the over the bearing part of the slide projecting freely minimized, which improved precision and thus increased Functional reliability enables.

In advantageous embodiments of the invention the slider slot is narrow and is less than 3 times Material thickness of one of the slide parts. The side possible resilient deflection of the funnel, which by the two slide parts is formed, it becomes small held.

Fig. 1 die erfindungsgemäße Schiebernadel mit Schieber, in schematisierter und ausschnittsweiser perspektivischer Darstellung,

Fig. 2 die Schiebernadel nach Figur 1, in einer Draufsicht mit Schieber in Umhängestellung,

Fig. 3 die Schiebernadel nach den Figuren 1 und 2, in Schließstellung, in einer schematisierten und ausschnittsweisen Draufsicht,

Fig. 4 die Schiebernadel nach den Figuren 1, 2 und 3, in Abschlagstellung, in einer schematisierten und ausschnittsweisen Draufsicht,

Fig. 5 die Schiebernadeln nach den Figuren 1 bis 4, in Rückzugstellung, in einer schematisierten und ausschnittsweisen Draufsicht,

Fig. 6 den Schieber der Schiebernadeln nach den Figuren 1 bis 5, in entspanntem Zustand, in schematisierter ausschnittsweiser Draufsicht,

Fig. 7 einen Teil des Schiebers nach Figur 6, in einem anderen Maßstab, in einer schematisierten Draufsicht,

Fig. 8 eine abgewandelte Ausführungsform der Schiebernadel, in Schließstellung, in einer schematisierten ausschnittsweisen Draufsicht,

Fig. 9 die Schiebernadel nach Figur 8, in Abschlagstellung, in einer schematisierten und ausschnittsweisen Draufsicht,

Fig. 10 die Schiebernadel nach den Figuren 8 und 9, in Umhängestellung in einer schematisierten Draufsicht,

Fig. 11 die Schiebernadel nach den Figuren 8 bis 10, in Rückzugstellung in einer schematisierten Draufsicht,

Fig. 12 den Schieber der Schiebernadel nach den Figuren 8 bis 11, in einer schematisierten und ausschnittsweisen Draufsicht, und

Fig. 13 einen Teil des Schiebers nach Figur 12, in einem anderen Maßstab in einer schematisierten Draufsicht.

Advantageous details of embodiments and further developments of the invention can be found in the subject matter of subclaims and / or the drawing and / or the associated description. Exemplary embodiments of the invention are illustrated in the drawing. Show it:

1 shows the slide needle according to the invention with slide, in a schematic and partial perspective view,

2 shows the slide needle according to FIG. 1, in a plan view with slide in the transfer position,

3 shows the slide needle according to FIGS. 1 and 2, in the closed position, in a schematic and partial plan view,

4 the slide needle according to FIGS. 1, 2 and 3, in the knock-off position, in a schematic and partial plan view,

5 the slide needles according to FIGS. 1 to 4, in the retracted position, in a schematic and partial plan view,

6 shows the slide of the slide needles according to FIGS. 1 to 5, in a relaxed state, in a schematic, sectional top view,

7 shows a part of the slide according to FIG. 6, on a different scale, in a schematic plan view,

8 shows a modified embodiment of the slide needle, in the closed position, in a schematic sectional top view,

9 shows the slide needle according to FIG. 8, in the knock-off position, in a schematic and partial plan view,

10 shows the slide needle according to FIGS. 8 and 9, in the transferred position in a schematic plan view,

11 shows the slide needle according to FIGS. 8 to 10, in the retracted position in a schematic plan view,

12 shows the slide of the slide needle according to FIGS. 8 to 11, in a schematic and partial plan view, and

13 shows a part of the slide according to FIG. 12, on a different scale, in a schematic plan view.

A slide needle 1 is illustrated in FIG. 1, the one shaft 2 with an end formed thereon Has hook 4. The one with a slightly rounded tip 5 leaking hook 4 tapers, as in particular also emerges from Figure 2. The tip 5 is in the Usually arranged on a plane of symmetry of the shaft 2. If necessary, the slide needle 1 can also be cranked sideways, be angled or curved.

The shaft 2 contains a slider slot 6, which of two diaphragm walls 7, 8 is limited. The diaphragm walls 7, 8 have spaced parallel planes trained inner surfaces 9, 10 on the flanks of the Form slide slot 6. The slide slot 6 starts its side facing the hook 4 flat out by the height of the diaphragm walls 7, 8 reduced to zero. The beginning of the slot 11 is in the area in which the diaphragm walls 7, 8 one for guiding one in the Slider slot 6 arranged slider 12 sufficient Have reached height. This amount is at the latest one Transition point 14 reached, from which the height the slit walls 7, 8 along the shaft 2 initially unchanged remains. Is one for guiding the slide 12 has reached sufficient height earlier, this can Place viewed as the beginning 11 of the slide slot 6 become.

As can already be seen in FIG. 1, the slide is formed from two slide parts 35, 15 which with respect to the The plane of symmetry of the shaft 2 is symmetrical to one another are. They are illustrated separately in FIG. 6, the or the slide member 35 again in Figure 7 is shown. Because of the symmetry of the two Slide parts 35, 15, the following description applies of the slide part 35 correspondingly for the or the slide part 15th

At its free end 16, the slide member 35 is from seen concave on the outside, the bend about one Circular arc follows. In this way, the slide parts form 35, 15 an open end of two legs 19, 20 limited funnel 17 which, as illustrated in FIG. 1 or 3, facing the tip 5 of the hook 4 and for it is set up the hook 4 or at least his Pick up tip 5. Specifying the funnel 17 Sections or legs 19, 20 of the slide parts 35, 15 rest against each other at a contact point 18. From here starting from the legs extend 19, 20 of the two Slider parts 35, 15 away from each other up to one Funnel opening width, which is about the diameter of the top 5 of the hook 4 corresponds. This is particularly from figure 3 showing the closed position of the slide needle 1 can be seen in which the free ends of the legs 19, 20th stand immediately at or in front of the tip 5.

Starting from the contact point 18 and from the funnel 17 leads the approximately circular bend of the slide parts 35, 15 again to remove the slide parts 35, 15 away from each other. The arcuate bend continues up to a first bending point 22. On section 23 of the slide part 35 adjoining here is essentially straight and flat. Section 23 closes with the adjacent area of the free end 16 an obtuse angle. The transition can be as sharp Bending line or as a more gently curved area be trained.

Farther from the free end 16, closes to the straight section 23 via a bending point 24 another, again unbent region 25 of the slide part 35 at. Section 23 and Area 25 form an obtuse angle with each other. Preferably this angle is slightly larger than the angle at the Bending point 22. In the relaxed state (Fig. 6) Slider parts 35, 15 the greatest distance from each other preferably at the bending point 24. Also at the bending point 22 is, however, the distance between the outside of the Slider parts 35, 15 larger than the width of the slider slot 6. The slide parts 35, 15 spring due to the Bend in one of the funnel 17 and the contact point 18 adjacent area away from each other and in Funnel area towards each other.

If the existing of the two slide parts 35, 15 Slider 12 in the slider slot 6 of the slider needle 1 used, the slide parts 35, 15 spring in the area 23 something together. As can be seen from Figure 3, lie the slide parts 35, 15 immediately after the beginning 11 of the slide slot 6 on the flanks 9, 10 of the slide slot 6. The plant is extensive and preferably on a front area (e.g. the section 23) of the slider 12 limited. The slide 12 is thereby centered in the slide slot 6. How out Figure 3 shows the funnel 17 is in the middle of the Tip 5.

The slide needle 1 described so far works as follows:

While operating a stitch-forming machine, in which the needle 1 is used, the Slide needle 1 moves along its longitudinal axis. Thereon the slide 12 is moved longitudinally, i.e. by doing Slider slot 6 moved. From that illustrated in Figure 3 For example, it is in the closed position Tee off position shifted according to Figure 4. The slide 12 keeps itself centered in the slide slot 6 and the Legs 19, 20 of the funnel 17 move laterally over the Tip 5 and thus close the hook 4. Because of the The legs are at a small opening width of the funnel 17 19, 20 close to the hook 4 and are laterally from this hardly off. The result is a smooth outer contour, can easily slide over the stitches or knocked off become.

By advancing the slider 12 in relation on the hook 4, the slide needle 1 can be in the transfer position be transferred, as illustrated in Figure 2 is. The slide parts 35, 15 move laterally on the Hook 4 over and are spread apart. Due to the extend through the bending points 22, 24 predetermined bend the areas 23 protruding beyond the hook 4 the slide parts 35, 15 approximately parallel to each other from the Hook 4 away. The slide 12 is guided by the Interplay of investment points at the beginning 11 of the Slider slot 6 and the lateral contact of the slide parts 35, 15 given on the hook 4.

In addition, the slide 12 can be illustrated in FIG. 5 Withdrawal position to be postponed. The Legs 19, 20 enter the slider slot 6. Because of the small opening width of the funnel 17, the Distance between the slide parts 35, 15 at the bending point 22 does not or only slightly exceeds, is the friction of the Ends of the legs 19, 20 on the flanks 9, 10 small. This has a wear-reducing effect and the slide runs as a result easily in the slider slot.

A modified embodiment of the invention Slider needle 1 is illustrated in Figures 8 to 13. As far as the same or functionally identical parts are present, the reference numerals of the above Description used without a separate explanation. Because of The construction and functional description is based on the above Executions referenced.

The difference of that illustrated in Figure 8 Slide needle 1 to that described above is in the slide 12. Its slide parts 35, 15 only have the bending point 22, but not the bending point 24 on. Starting from the bending point 22, the Slider parts 35, 15 (as for the slider part 35 in particular emerges from Figure 13) in a relaxed state straight away. However, this also leads to an investment in the Slider parts 35, 15 on the flanks 9, 10 of the diaphragm walls 7, 8 in the vicinity of or in the immediate vicinity from the beginning 11 of the slide slot. The slide 12 is centered and the game between the slider 12 and the flanks 9, 10 of the slot channel 6 is like here also compensated for in the embodiment described above. The game turns out to be a distance 30 between the slide parts 35, 15 a.

In this embodiment, too, the slide needle 1 points the funnel defined between the legs 19, 20 17 a width that is little or no greater than the diameter of the tip 5 of the hook 4. Will the slider 12 from its closed position illustrated in FIG. 8 pushed into the tee position according to FIG. 9, find the legs 19, 20 over the tip 5 without using this to collide. This is achieved in that the slider 12 on the bearings where the Slide parts 35, 15 rest on the flanks 9, 10, centered is. The small distance between the bearing point 14 and the tip 5 of the hook 4 ensures centering.

By pushing the slide further in, the Figure 10 illustrated shoulder position can be taken. Close due to the missing second bending point 24 the projecting beyond the hook 4 ends of the slide parts 35, 15 an acute angle with each other.

The opening width of the funnel 17 is essential less than with previously used needles split or slotted slider. Therefore the Funnel when moving into the slider slot is essential be less compressed. This will kick the funnel 17 with little friction into the slider slot 6 a.

A slide needle 1 has one of two resilient Slider parts 35, 15 formed slider 12 on in a slide slot 6 of the slide needle 1 is slidably mounted. The slide parts 35, 15 are arched or bent away from each other, the curvature is arranged close to the free end of the slide. The Distance between one end of the slide part 35 or 15 up to a first bending point 22 agrees approximately the distance between the tip 5 of the hook 4 and the Beginning 11 of the slide slot 6 match. It will possible the distance between bent away from each other Legs 19, 20 of the slide parts 35, 15, one Form funnel 17 for receiving the tip 5 of the hook 4 are supposed to be kept very low. Both through the special Bend improved guidance of the slide 12 than also the only slight expansion of the funnel 17 increase the functional reliability and service life of the slide needle 1.

Claims (10)

1. Compound needle (1) for loop-forming textile machines,
   with a needle body, the blade (2) of which bears a hook (4) with a point (5) at one end and has a slider slot (6) beginning opposite the open side of the hook (4), has two parallel flanks (9, 10) and extends away from the hook (4),
   with a slider (12), which has at least two slider parts (35, 15) and is disposed to be longitudinally displaceable in the slider slot (6) and which is located in a closed position with its free end in direct proximity to the point (5) of the hook (4),
   wherein the slider parts (35, 15) are bent away from one another at their free legs (19, 20) pointing towards the hook (4) in order to form a funnel (17) open towards the hook (4),
   characterised in that the slider parts (35, 15) adjoining the funnel (17) are bent away from one another so that in some regions the slider parts (35, 15) resiliently abut against the flanks (9, 10) of the slider slot (6) at abutment points, wherein the bent-out section is dimensioned such that the abutment points are located in the vicinity of the beginning (11) of the slider slot (6) when the slider (12) is moved into the closed position.
2. Compound needle according to Claim 1, characterised in that the slider parts (35, 15) are constructed symmetrically to one another and abut against one another at the end of the funnel (17).
3. Compound needle according to Claim 1, characterised in that the bend of the respective slider part (35, 15) is formed by at least one bending point (22), at which adjacent regions of the slider part (35, 15) enclose an obtuse angle with one another.
4. Compound needle according to Claim 1, characterised in that the bend of the respective slider part is formed by only one bending point (22), at which adjacent regions of the slider part (35, 15) enclose an obtuse angle with one another.
5. Compound needle according to Claim 1, characterised in that the bend of the respective slider part is formed by only two bending points (22, 24), at which adjacent regions of the slider part (35, 15) enclose an obtuse angle with one another.
6. Compound needle according to Claim 1, characterised in that the slider (12) can be moved into a cast-off position, in which the legs (19, 20) of the slider (12) forming the funnel (17) are pushed over the point (5) of the hook (4).
7. Compound needle according to Claim 6, characterised in that the abutment point of the slider (12) lies in the cast-off position at the beginning (11) of the slider slot (6).
8. Compound needle according to Claim 1, characterised in that the point of the hook (5) is slightly rounded, and that the funnel (17) formed by the slider (12) has an opening width which is essentially as large as a diameter of curvature fixed by the point (5).
9. Compound needle according to Claim 1 or 5, characterised in that the slider (12) may be moved into a stitch transfer position, in which the two slider parts (35, 15) extend laterally past and beyond the hook (4), and that the bend of the slider parts (35, 15) is such that the slider parts (35, 15) project essentially parallel to one another beyond the hook (4).
10. Compound needle according to Claim 1, characterised in that the regions of the slider parts (35, 15) of the slider (12), which form the abutment points in the closed position, are located outside the slider slot (6) when the slider (12) is moved into the stitch transfer position.

Images