DE673999C - Pick-up needle - Google Patents

Description

Needle for picking up stitches The main patent 662 030 describes a needle for picking up stitches in knitwear, which, in contrast to the previously known needles of this type provided with a tongue, a slide or a resilient hook, has a longitudinal front incision in the needle shaft and in the area of the hook tip has an exposed member that rolls between two end positions, which is tangentially touched by the loop to be chained to slide along the shaft and carried along in a rolling motion until the hook opening is closed and thus the relevant loop over the Hook can be guided.

But since when the needle penetrates to the inside of the hook the Stitch sliding up the shaft, possibly in a row and without obstacles is to put back, it was further ensured that the attached rolling Organ or wheel disappear when rolled back into a recess in the needle incision could. Then take the wheel out of this position in the next step to be able to, the front of the shaft was finally fitted with a Notched to allow the slipping stitch from behind reaches the roller circumference and thus lifts said roller out of the recess and she in the rolling position.

Practice has shown, however, that the process in question is not always takes place flawlessly, and especially. that the cog not always, as desired, rolls out of the depression, but often simply shifted will. The consequence of this is a slight increase in the stress on the affected Mesh.

By increasing the diameter of the rolling organ and widening it the recess, in such a way that the wheel lying in it is behind over the back of the shaft protrudes, can indeed be achieved; that the same time with the front flap Rear, already lifted hash sliding along the back of the shaft onto the Wheel hits and helps lift it out of the depression. The cog is then, so to speak, from the rear when the needle is withdrawn from the knitted fabric Pass the stitches to the front, as it relates to the direction of movement of the needle it is known that the rear stitch that is canceled with respect to the front stitch that is to be canceled is known rushes. But, as just indicated, it becomes a wheel of larger diameter chosen, it means nothing else than a wider one, the mesh mechanically more stressful point on the needle, which should be avoided.

Based on the subject matter of the main patent, it is now proposed that delimits the needle having the wheel with one in a front shaft incision to provide pivotable and longitudinally movable slide, which apart from a rear Support point in front, attacking the wheel in the area of its axis, the latter as the front Has support point, provided profiled on the front and back ridge of the slide Parts for transferring the impulses received from the stitches to the wheel in ensure that the latter, properly lifted from a depression, starts rolling is brought.

It has already been suggested; sliding in the shaft, both straight to use guided as well as sliding and pivoting slides at the same time. However, the former had the disadvantage that they prevent the needle from passing through Knitwear made it difficult, especially because you were forced to use this slider with a to provide lower protrusion, which widens the needle profile and unnecessary, even causes dangerous tension in the mesh. This was why the slider was used was then slidably and pivotably arranged so that during a advance the needle the leading picked up stitch the one provided with your back attachment Slider could lift each, which is in it through the with its upper edge in contact reaching trailing stitch to be lifted was lowered again, so that a smoother Slipping through was the result. When such trained needles are withdrawn but the slider between the two aforementioned meshes is stuck, so to speak and up to the sleep position against a spring action with, taken. This clamping but in turn leads to unnecessary and harmful mechanical stress of the meshes, in particular, the force of a spring has to be overcome the stitches are only relieved when the needle is passed, this in the other direction but all the more burdened. This spring can not in this known embodiment be dispensed with, as they close the slide under the effect of its own weight and prevents the slide from sliding back regularly anyway ensures in the rear rest position.

The mode of operation and the advantages of the new needle should now be at hand the drawing will be explained in more detail using an example.

Figs. I, 3 and 4 show side views of the needle on a larger scale, namely in the closed position, in a middle position and in the lowest position Position of the wheel.

FIG. 2 is a plan view corresponding to FIG.

The Vig. 5 to 13 show in a diagrammatic representation the entire process when undoing a stitch. These figures are all seen from above so that the upper side of the knitted fabric is visible, with the exception of FIG. 10, which corresponds to a view from below.

14 to 17 relate to individual changes that could still be made to the needle according to the invention. and represent these on an enlarged scale with respect to FIGS.

The needle consists of the shaft r with the hook tip z and has like the needle described in the main patent, a wheel 5, which is held wider in the front part 3 'of an incision 3 kept narrower in the rear part and can roll here. In 3 ″, the wider part of the aforementioned E makes an incision the needle shaft through it, in such a way that the wheel goes down to the lowest position accordingly Fig. 4, in which the slightly smaller than the wheel diameter kept Length of the incision opening holds the wheel back, d.li. prevented from falling through.

In the narrow part of the incision and down to the notch A squint 1z, which has two points of support, extends in front of the little wheel on the axis 13 of the wheel and backwards inside the incision 3. in the In the area of this rear part, the slide has a cutout 14 which the freedom of movement in the longitudinal direction in connection with a pin 15 of the Shank limited. Immediately behind the wheel, the slide has a lower one Approach 16, which is in the lowest position of the wheel (see Fig..1) on the back of the shaft protrudes beyond the deepest point of the wheel. To let this through Approach the narrower part of the incision 3 at the front between the points 3 "' passed through the needle shaft.

The connection with the wheel takes place in such a way that the corresponding The end of the slide is fork-shaped and accommodates the wheel axle. Furthermore, the upper edge of the slide has one immediately behind your wheel beginning notch 17, behind which a raised part 18 of the upper edge up to the cutout 14 leads.

The one between the two end positions of FIGS. 1 and 4 is noteworthy 4 in the course of the advancement of the needle occurring middle position according to FIG. 3, which the practical best dimensions of individual parts of the needle can be found. In this position in which the axis of the wheel is on the center line A-A of the needle shaft the diameter of the wheel is slightly larger than the width of the shaft on both sides of this shaft by an equally large but relatively small amount beyond the same. At the same time, however, the wheel of a line B-B is tangential, the direction of the rising from the inside of the hook to the upper edge of the shaft Part extended while the slide hits the pin 15 backwards.

It should be noted that the length of the slide to the pin is insignificant is, so that the cutout 14 and the correspondingly located pin 15 as far as desired can be removed from the cog.

The dimensions of the approach 16 can be determined according to the following considerations «-I: hlen: It must be approximately, as shown in Fig. 16, a height H above the Reach out the wheel circumference that corresponds to the height or wall thickness of the needle shaft inside of the incision. This, so that the wheel through a back on the needle shaft passing mesh except for the inner flat part of the cut part in question can be raised to roll properly there.

Then, however, the upper edge part 17 'of the slide (see Fig. 6) run at least, approximately parallel to the lower edge 16 'of the approach i6.

Furthermore, as can be easily seen from FIG. I, the lowest point should be the notch 17 relocated to the rear with respect to the highest point of the extension 16 be.

Finally, the raised part 18 of the upper edge of the slide must be in the deepest Location of this latter (according to FIG. 4) still protrude a little beyond the upper edge of the shaft.

In FIGS. 5 to 13, the just to be canceled in one operation Mesh shown in black for better understanding. This is called the front stitch Mesh has the reference number 19, while the so-called rear mesh that has just been canceled is designated by 2o. The terms anterior and posterior mesh are justified by that in the operation in question the first at the front and the two at the back Slide along the shaft.

In the starting position according to FIG. 5, slider and wheel can either as shown, be in the closed position, which is the case when one in the middle of work, or they could also be in the open position as per Fig. 4 if you are just starting a job. The stitches are in both Cases as indicated in Fig. I in i9 and 2o.

From the position shown, the needle is now in the direction of the arrow 21 pushed into the knitted fabric and soon reaches the position according to FIG. 6, in which the front stitch i 9 is about to come against the wheel 5 and this to set in a rolling motion backwards. As a result of their lower tension if this front stitch ig lags behind stitch 2o in the course of the movement of the needle, as shown in Fig. 1 from the layers of these stitches indicated with iga and 2o11 can be.

As the needle advances further, it moves into the position shown in FIG Fig. 7, in which the stitch i9 that has now got over the wheel runs smoothly as a result of the the latter accelerates its movement in relation to the needle, so that it suddenly gets into the position shown in Fig. 3, labeled igP, in which it neither leads nor lags the mesh 20b. Simultaneously with the rolling of the wheel, the slide 12 was in its rear end position against the pin 15 brought to the stop. Only the front end of the slide and the wheel remain nor the possibility of pivoting about the pin 15 as the center. The one just now Rolling movement of the wheel that has taken place from the closed position to the last one described location takes place initially and over a very short distance along the incision 3 'in the direction of the shaft axis until the wheel passes through the opening 3 " and there becomes free to cross to move towards the shaft direction. That However, the wheel remains in its 1% tied position for the time being, because the wheel and slider, as can be seen from the layers igb, tob of the meshes in FIG. 3, between them the latter are performed .. It should be noted that the meshes practically by no means are more stressed by wider parts than just penetration of the smooth needle shaft is required. '' As the needle continues to penetrate into the position according to FIG. 8 passes the mesh ig in the notch 17 of the slide, which at the same time through the mesh 2o which meets the approach 16 something out of the shaft is lifted. The latter can be explained with reference to FIG. 3 in such a way that the stitch -ob, which now slides up the back of the shaft i, the approach 16 displaced into the shank, while the mesh lgb, which is the front of the shank describes itself along the part 17 'to the deepest point. the notch 17 moved in. But the two stitches are not pulled apart in any way, inadmissibly tensioned, because namely the edge i7 'approximately parallel to the edge 16' runs (see Fig. q.). So the needle penetrates through the knitted fabric, as if the shaft would run smoothly over its entire length.

Also with further advancement to the end position according to FIG there is no significant resistance to the tabs. The 20 mesh that is now is behind the approach 16, has .the smooth shaft back part in front of him. The front one Mesh 1g, however, meets the raised upper edge 18 of the slide, which, however, always rotating around the pin 15, is pivoted into the shaft and the wheel 5 pushes it down into its end position in opening 3 ". This movement takes place takes place without friction or application of force, and at last there are the two Stitches in layers igc and 2oc in FIG. 4, again with a lagging pocket igc.

As in the last-mentioned figure q. it can be seen that the slide is like this trained that in the said lowest position he was somewhat, but very little, about the front edge of the shaft protrudes so that the mesh is sure to press it down and hold something there.

Of course you can insert the needle as far as you want into the knitted fabric but will limit the rash to what is absolutely necessary.

The arrow 22 in Fig. G shows that the needle is now being withdrawn. During this withdrawal, the stitches slide ig and 2o down the shaft, however, by taking the mesh with it first so that it is in relation to the new sliding device of the mesh 2o lags again until the one shown in FIG Layers igd, 2od can be achieved, which correspond to the view from below of Fig. 10. Here is the mesh 20 "close to the back of the approach 16 of the slide 12, which through the further advance of this mesh is lifted and pushed forward so that the small wheel tends to move the edge K of the opening 3 '' 'in the direction of the arrow 23 to rotate. This turning movement is partly carried out, but also partly the wheel is lifted off the edge K and in a position approximately as shown in Fig. 3, lifted up, but moved a little further forward. This depends on the inclination the needle in relation to the knitted fabric, from the respective position of the sliding down Mesh ig and from the profile of the part 18 'of the meshing against the latter Leading edge elevation of the slide, eliminating the law of pivoting and displacement of the slide and wheel is influenced.

At a given moment, when the mesh 2o over the ridge of the Approach 16 slides over, the mesh comes ig into the deepest point of the notch 17, which lies behind the ridge of the lug 16 with respect to the tip of the hook. this again corresponds to the trailing movement of the tab 1g in relation to the mesh 2o.

As already said, the slide has swiveled, furthermore, too moved something forward. But both stitches go past the slider without that the latter is in some way caused by a sudden widening of the -To be pulled apart and mechanically stressed too much.

When the needle is withdrawn further, as shown in FIG. I i slides the -lasche ig over the inclined plane 17 'located at the front of the notch 17, with the insignificant resistance that occurs here contributes to this, the cog a little more to put it further forward, in a position where it is then under the influence of the above guided and rising mesh according to FIG. 12 is properly set in motion. At the same time, however, the hook 2 has captured a new loop.

The small wheel rolls smoothly from the position shown in FIG. 12 to the end position and leads the stitch over the hook closed by this wheel, which finally FIG. 13 represents. The starting position shown in FIG. 5 is also used reached, but with mesh 20 instead of mesh and instead of the Mesh i9 lying mesh 23.

The next time the Repeat the needle the processes just described.

From what has already been said, it emerges that the various organs of the needle preferably have some special conditions mentioned at the beginning, which can be repeated as follows: The slope of the edge 17 'is practically parallel to the edge 16' of the attachment 16. This approach takes effect over the circumference of the wheel by a height H which corresponds to the thickness 1I of the needle shaft wall inside the incision.

The deepest point of the notch 17 lies further back in relation to the neck tip than the ridge of the shoulder 16.

In the lowest position of the slide, its upper edge protrudes by one low value beyond the front edge of the shaft.

Finally, those already indicated with reference to FIG. 3 are preferred geometrical rules followed.

The inner back edge 24 of the slide does not have to have any particular shape have, but it just has to be able to pivot around the pin 15 and the Sliding of the slide can be secured with a little play.

The back edge part 2- 'is mainly hollow so that the Slider becomes easier what. could also be achieved by opening the slide would be provided with perforations in various places.

Like other compound needles, the needle according to the invention has the The advantage is that it cannot jump off in any way during the work, as is the case with Latch needles occurs frequently. Is that the rash of the latch needles Unintentional backward movement is somewhat shortened, so it can happen that the needle is withdrawn with the slider half open, the slider in a front next to be picked up meshes and this with the sliding along the shaft Mesh leads over Alen hook, which then no longer contains any mesh and jumps off. This cannot happen here.

With the known compound needles provided with a retraction spring, however, it can happen, especially if the knitted fabric is not stretched very tightly, that the tab sliding along the front of the shaft is unable to pull the slide against the spring force and the inherent pressure of the tab to pull the friction generated along the base of the needle incision to the front. In this case, this loop jumps off the slider and gets into the hook with the loop that has already been picked up. The hook then contains two loops, e.g. 12 as the mesh 1 9 and 23 of FIG. In the next reciprocation of the needle, the thing can set the record straight but again, but it remains the needle once or more times are sequentially, resulting in an irregular result of the work carried out. This is impossible with the needle according to the invention. Neither increased friction nor the force of a spring has to be overcome here, so that the slide and wheel are taken regularly and properly into the closed position.

As an advantage, it should also be mentioned that the going back and forth Movement of the working needle distance covered, d. H. the rash of the needle, can be kept quite smaller in the needle according to the invention than in the usual compound needles. In the latter case, the slide on the one hand must not be kept much wider than the shaft width, and it must be the slide on the other hand, if moved forward, the hook leading edge becomes a smooth one Result in sliding surface. The tip of the hook must therefore not be significantly wider than the needle shaft, but for this reason it has to be quite a long way from it be removed, d. H. there must be a fairly large hook opening for the At the front of the slider, the mesh sliding along the shaft does not jump off the hook. This unnecessarily lengthens the needle and thus the required deflection when working.

In the case of the needle according to the invention, the hook opening can be measured longitudinally can be significantly reduced because the tip of the hook is slightly wider than the needle can be held due to the slight stroke that is guided over the hook Mesh learns from the cog. There is no need to shorten the deflection of the needle Time to work and reduces the friction on the meshes.

Practice has also led to the result that the invention The needle can never come off, even if there are several rows of stitches next to each other must be canceled. The needle takes both in relation to the working direction Left-hand chain as well as the right-hand chain flawlessly on what has been done so far could never be achieved. This is of particular advantage when in the knitted fabric as a result of a hole on both sides of this hole several meshes jumped off are; because you can on one side of the hole z. B. pick up a row on the right, then the opposite left row on the other side, which you immediately start with the former linked, etc., while up to now in the. Had to act wisely that all chains lying next to one another are placed on one seat of Hole and held it with a thread until all of them lay next to each other Chains on the other side were also included and in the same way.

14 shows, on a larger scale, a modification of the front end of the slide, which has the purpose, by the arrangement of a front protruding beyond the wheel rising edge part 25 the rise of the loop sliding up from the hook to facilitate or at least guide by turning the wheel then rolls back a little earlier than in the case already described. The arrangement must of course be such that the nose formed by this slope at the end of the slide in the rearmost and deepest position of the latter shown in dash-dotted lines nowhere protrudes beyond the back 26 of the needle.

Fig. 15 shows how you could fix a small spring 27 in the incision 3 of the needle shaft i, z. B. by its rear part 28 shown in black is clamped between the side walls of the shaft, with your purpose to clamp the slide 12 very easily in its rear rest position and thus to secure the corresponding open position of the needle so that it is always ready to work. If such a spring is missing, the needle can be opened very easily, simply by inserting it into the knitted fabric in the usual way. plugged. It opens easily and does its job properly the next time it is withdrawn.

16 and 17 show how one can by changing the inclination of the rear Edge of the projection 16 can train the needle as closing early or late. at 16, this rear edge i6 ″ is almost perpendicular to the embodiment according to FIG Shaft direction, so that the slide and wheel through a direction of arrow 29 any mesh that comes into contact with this edge can be lifted very quickly. In the embodiment according to Fig..l7, on the contrary, the edge 16 "is very inclined; so that one in the direction of the arrow 3o along the rear shaft part sliding mesh a slow lifting the slide and wheel will trigger.

With a suitable inclination of the edge '16 ", in particular the Working speed of the needle can be influenced. Also the needle needs to be adjusted accordingly be held more or less inclined with respect to the knitted fabric. Of influence can finally be the more or less great coarseness or delicacy of the knitted fabric, so that if necessary for the processing of different goods needles with different Approach profiles can be produced. @r

Claims (12)

ATRNTAIV'S SPRLCHE: I. Needle for picking up stitches in knitted fabrics according to patent 662030, characterized in that the rolling element cooperates with a slide (12) arranged to slide and pivot in an incision in the needle shaft, and the slide works with a rear support point at the front, attacking the rolling element (5) in the area of its axis (13), the latter being used as a front support point, the rolling element being partly set in motion by the N1 ashes in the main patent, partly also by the usual ones Way is moved by the mesh operated slide, which lifts the rolling organ from a temporarily receiving recess on the runway with each needle stroke. 2. Needle according to claim i, characterized in that the front end of the slide is fork-shaped, in a notch of the wheel (5) trained rolling organ engages and the axis (13) of the wheel absorbs. 3. Needle according to claim i, characterized in that in the rear End position of the slide (12), in which the rolling element (5) enters through the back of the shaft through recess (3 ") of the same can be pivoted in, the circumference of the pivoted into a symmetrical position with respect to the shaft center line (A-A) rolling organ the direction (B-B) of from the inside of the holding to the upper edge of the shaft the rising part of the shaft (1) touches tangentially. d .. Needle according to claims i and 3, characterized in that the rolling member (5) in the designated Symmetry position on both sides of the shaft (i) protrudes beyond the same by the diameter this rolling organ is a little larger than the shaft height. 5. Needle after Claim i, characterized in that a rear projection (16) known per se of the slide (1:22) in the pivoting direction of the same over the circumference of the rolling organ reaches out that as a result of the passing of a mesh approach pressed into the shaft a position of the slide and the rolling element determines from which the latter can roll up to the hook in the shaft direction. 6. Needle according to claims i and 5, characterized in that the slide Behind the rolling member (5) has a recess (17) and that the upper edge of the slide, rising from the lowest point of the same towards the rolling organ (17 '), runs practically parallel to the lower edge part (W) from the ridge of the attachment (16) against the rolling organ. 7. Needle according to claims 1, 5 and 6, characterized in that that. in relation to the longitudinal direction of the slide, the deepest point of the recess (17) is moved back with respect to the ridge of the approach (16). B. Needle according to claims 1, 5 and 6, characterized in that the rear upper edge part (18) of the Slide (12) behind the recess (17) rises in such a way that it is completely at The slide pivoted into the shaft (i) protrudes a little over the front edge of the shaft. G. Needle according to Claims i and 3, characterized in that the through the back of the shaft through recess @ (3 ") is dimensioned such that it is the rolling organ (5) prevented from falling through. ok Needle according to claim i, characterized in that that to limit the slide slide movement and to determine its center of rotation the rear end of the slide (12) lying in the shaft (i) with a cutout (14) which cooperates with a pin @ (i5) located transversely through the shaft. i i. Needle according to claim i, characterized in that the rear end of the Slide (12) in the rear end position of the latter with one in the shaft incision lying spring (27). cooperates, which easily clamps the slide in said position. 12. Needle according to claims i and 2, characterized in that the front fork part protrudes beyond the rolling element (5) and the edge (25) thus formed rising the meshes coming from the hook (2) leads to the rolling element.