JP2022519143A - Knitting machine needles and knitting system - Google Patents

Abstract

The present invention limits the shank (3) in the longitudinal direction (z) of the shank (3) and ends with the hook tip (4), the hook (2) for forming a loop, and the hook (2) to the shank. It relates to a knitting machine needle (1) including at least a first driving portion (33) following the longitudinal direction (z) of (3). The knitting machine needle (1) has a predetermined breaking portion (9) for separating the hook (2) from the first driving portion (33). The default fracture portion (9) is formed by a portion of the shank (3) and extends in the longitudinal direction (z) of the shank (3). Also, the default fracture portion (9) is the first shank extending in the longitudinal direction (z) of the shank (3) between the tip (4) of the hook (2) and the first drive portion (33). The whole is arranged in the part (10). Further provided is a knitting system (15) with a knitting machine needle (1) having a predetermined fracture portion (9).

Description

The present invention relates to needles for knitting machines and knitting systems.

Known knitting machine needles exist in many different configurations. Knitting machine needles are used in knitting machines and often move through one or more bats of knitting machine needles in the grooves of the knitting machine needle bed. In this case, the butt of the knitting machine needle interacts with the cam of the knitting machine. In particular, in the case of a high-speed knitting machine, a strong acceleration force is applied to the needle for the knitting machine. Knitting machine needles with latches (latch needles) are frequently used. The latch makes many reciprocating movements to form a loop with the hook. In the case of a high-speed knitting machine, the high mobility of this reciprocating motion may cause defects in loop formation. This type of defect is facilitated by the inevitable wear of hooks and latches. The hook and latch are located at the front end of the knitting machine needle and are connected to the butt of the knitting machine needle via a shank.

In some knitting machines, a collision occurs between the butt of the knitting machine needle and the cam or selector. In Jitsukai Sho 62-191888 and European Patent Application Publication No. 14244416, for knitting machines so that the bat breaks before major damage occurs, in order to counter the occurrence of damage, or at least to mitigate the damage. It has been proposed to provide a predetermined break point in the needle butt. A similar default break point is described in China Utility Model No. 2534208. Further, the needle described in China Utility Model No. 2534208 is provided with a recess on the lower surface of the shank of the needle below the position where the latch retracts. This recess serves to relieve tension in the loop as it slides over the latch on the back. This tension relief occurs when an existing knit (preferably the preceding loop) engages in this recess. This type of tension relief depression is found in many knitting machine needle configurations below or in the immediate vicinity of the back position of the latch. These depressions are not the default break points as the depressions are not intended to break with a significant probability as a result of the force exerted by the thread on the hook.

German Patent Application Publication No. 1635837 shows a needle provided in the shank with a portion to prevent the transmission of a shock wave from the bat to the hook. These portions may be configured as portions with changed mechanical properties, or may be configured as portions with a smaller diameter of the needle. In each embodiment, this special portion is provided at the position where the height of the shank is maximized. These parts are not the default break points as the shank is not likely to break at these parts.

German Patent Application Publication No. 4320956 and German Patent Invention Publication No. 19503048 show default break points for sewing and knitting needles.

In recent years, especially in elongated knitting machine needles, damage due to collision between a portion adjacent to a shank butt and a portion adjacent to a cam has occurred.

An object of the present invention is to improve the above problems.

The above object is achieved by the knitting machine needle according to claim 1 and the knitting system according to claim 13.

The knitting machine needle according to the present invention includes a hook for forming a loop, the hook limiting the shank in the longitudinal direction of the shank, i.e. starting from there and ending at the tip of the hook. The hook follows the first drive portion in the longitudinal direction of the shank. The cam element of the knitting machine transmits the force for moving the needle of the knitting machine to the driving part of the needle of the knitting machine. The drive portion may be configured as a butt projecting above the shank along the positive height direction of the shank. Further, the driving portion may be formed by a coupling position. In this case, the connecting element usually has a butt, and the force for moving the knitting machine needle acts on the connecting position of the knitting machine needle in a known manner. Knitting machine needles according to the present invention may further include a latch. The latch closes inside the hook in the closed position and is pivoted to the shank so that the tip of the latch points toward the first drive along the longitudinal direction of the shank when the latch is in the backward position. You may. The latch may be pivotally supported on the shank by a hinge or shaft by a pin formed on the shank.

A needle for a knitting machine according to the present invention is characterized in that a predetermined breaking portion for separating the hook from the first driving portion is formed by a part of the shank and extends in the longitudinal direction thereof. As used herein, a "part" extends in the longitudinal direction of the needle over a distance longer than a small distance. The default fracture portion is entirely located in the first portion of the shank, the first portion of the shank extending along the longitudinal direction of the shank between the tip of the hook and the first drive portion. ..

Surprisingly, the problem of needlebed and cam damage was found to be significantly mitigated by this type of default rupture. This fracture manifests its effect on the shank of the knitting machine needle, resulting in a shank break between the hook and the first drive portion.

The default break extends in the longitudinal direction of the knitting machine needle over a non-minor distance. Knitting machine needles have a fairly high probability of breaking at a given break as a result of the forces that can be transmitted by the yarn if the needle is prevented from moving within the needle bed or if the loop knockover fails. .. As defined herein, the shank of the knitting machine needle extends over its entire length and is only subdivided into various different functional parts. The end of the shank forms a hook and has a portion bordering the hook that can come into contact with the yarn during the knitting operation. The shank also has a portion (driving portion or butt) that initiates the movement of the knitting machine needle. The portion located between the above-mentioned portions serves, for example, to guide the knitting machine needle (on the needle bed) and joins the above-mentioned functional portions. The default fracture is advantageously located at a portion having the ability to guide and join other functional portions of the shank. The shank may have parts of varying height. The parts having different shank heights may be fused with each other at the transition point. The first transition point may be located near the drive portion. The second transition point may be located near the hook. The second transition point may be located along the longitudinal direction from the tip of the hook at a distance of twice or three times the tip of the latch in the backward position of the latch. Further, the distance between the second transition point and the tip of the hook may be any value between the above values.

The predetermined breaking portion of the knitting machine needle is the force acting on the hook, and the hook is first driven by a force less than 80% of the force that permanently deforms the needle of the same structure having no predetermined breaking portion. It may be configured to be separable from the portion. The default fracture portion may be configured such that the hook is separable from the first drive portion, especially when an exceptionally large force is applied to the hook in the negative height direction. .. Those skilled in the art will appreciate that at least the diameter of the thread (“thinness”) is related to the breaking strength of the needle, and that the breaking strength is certainly determined by the fineness of the needle as well. This fineness also determines the maximum diameter of the yarn used. Since the tensile strength of the yarn also depends largely on the diameter of the yarn, it can be said that this fineness is a characteristic of the needle that has a great influence on the composition of the predetermined fracture portion as a whole. The fineness (gauge) of the knitting machine needle can be determined by the thickness of the band (strip-shaped material) punched out by the knitting machine needle, and may be measured in the width direction of the knitting machine needle. .. For 0.4 mm gauge needles, the force with which the hook is separated from the first drive portion can be in the range of approximately 5N to 1N, depending on the configuration of the predetermined breaking portion. A knitting machine needle of the same structure would be permanently deformed at about 8N. Here, the term "deformation" should be understood herein as a general term, in particular including "bending". A dedicated test to verify the suitability of a given break is to place the needle on the table with its underside (the surface facing away from the bat in the height of the bat) in contact with the table. The needle is pushed until the tip of the hook extends beyond the edge of the table and the end (front) portion of the hook of the needle protrudes at least so that the predetermined break extends beyond the edge of the table. If a defined breaking force or buckling force is applied to the hook, the needle should break at the defined breaking point. If the needle plastically deforms but does not break when the force is further increased (see example above), the needle's suitability for the purposes of the present disclosure is questionable.

The knitting machine needle may have a predetermined break portion that is entirely located in the second portion of the shank. The second portion of the shank extends longitudinally in the shank between the position of the tip of the latch in the rearward position of the latch and the first drive portion.

The knitting machine needle may have a predetermined break portion that is entirely located in a third portion of the shank. This fracture begins at a distance of two latch lengths from the pivot point of the latch in the direction of the first drive portion along the longitudinal direction of the knitting machine needle, and the first along the longitudinal direction of the knitting machine needle. It ends at a point separated by 3 latch lengths from the pivot point of the latch in the direction of the driving part of. The latch length is the distance between the pivot point of the latch and the tip of the latch (for example, the n latch length means a distance n times the latch length). This pivot point or bearing point of the latch may have a bearing seat in the latch in the form of a circular through hole, into which a shaft or pin extends. The latch length may be measured from the center of this through hole. The tip of the latch is the point of the latch farthest from this center point, and the distance between these two points can represent the latch length. By specifically defining the position of the predetermined break in the longitudinal direction of the knitting machine needle, it is possible to reduce the variation in the force with which the hook separates from the driving part, as shown by individual examples of a large number of knitting machine needles. can. The positions of the start point and the end point of the third portion of the shank described above are particularly advantageous when the latch operation length is 6.5 mm. The latch operating length may be measured along the longitudinal direction of the knitting machine needle from the end of the hook of the needle in the longitudinal direction of the shank to the tip of the latch in the backward position of the latch. The third part of the shank of the knitting machine needle with a latch operating length of 7.5 mm preferably starts at a distance of 1.5 latch lengths from the pivot point of the latch, and advantageously the pivot of the latch. It ends at a point separated by 3 latch lengths from the point. The third part of the shank of the knitting machine needle with a latch operating length of 5.5 mm preferably starts at a distance of 2 latch lengths from the pivot point of the latch, and advantageously from the pivot point of the latch. 3.5 Ends at a point spaced by the latch length. The third part of the shank of the knitting machine needle with a latch operating length of 4.5 mm preferably starts at a distance of 2.5 latch lengths from the pivot point of the latch, and advantageously the pivot of the latch. It ends at a point separated by 4 latch lengths from the point. The position of the third part of the shank must be properly extrapolated to the unreferenced latch operating length values.

The default break may be located at the fourth portion of the shank or the fifth portion of the shank. The fourth portion of the shank may extend from the pivot point of the latch to the second transition point. The fifth portion of the shank may extend from the position of the tip of the latch in the rearward position to the second transition point. For knitting machine needles without latches (eg, slide needles), the default break may be located at the sixth portion of the shank described below. The slide needle has a guide means for the slide (hook closing element), and the guide means are arranged at intervals in the longitudinal direction from the tip of the hook and extend longitudinally toward the drive portion. These guides do not extend below the tip of the hook. As a result, there is a minimum distance along the longitudinal direction between the tip of the hook and the guiding means. The sixth portion of the shank may extend from the tip of the hook by 1.5 to 3 times this minimum distance.

The knitting machine needle has a longitudinal distance of at least 75 mm from the end of the hook of the needle in the longitudinal direction of the shank to the start of the first drive portion (ie, the first bat) (the side closer to the hook). May be.

The knitting machine needle may have a shank having a height of 0.8 mm to 1.5 mm (“chest height”) at the highest point where the latch is pivotally supported by the shank. This height is measured in the height direction. The knitting machine needle may have a shank having a height between 50% and 70% of the chest height at the portion where the predetermined break is located.

The knitting machine needle may have a shank punched out from the strip material. The shank may have a thickness of 0.3 mm to 0.6 mm or 0.3 mm to 0.7 mm in the width direction at a portion where the thickness matches the thickness of the strip-shaped material.

The knitting machine needle may have a predetermined fracture portion with a reduced cross section perpendicular to the longitudinal direction of the shank. "Right angle to the longitudinal direction" means, in particular, within the plane defined by the height direction x and the width direction y of the needle.

The knitting machine needle may have a predetermined break portion in which the cross section of the shank is reduced. This reduction in cross section is achieved by a reduction in the height direction of the shank. This type of default fracture has the advantage that it can be manufactured simultaneously during the punching process and does not require a separate manufacturing step. Therefore, the predetermined fracture portion can be economically manufactured. The height reduction of the shank may be from above and / or from below. However, it is also conceivable that the shank may be provided with recesses (or a plurality of recesses) that do not extend to the upper and lower sides of the shank or the predetermined fractured portion. Knitting machine needles have a default break that is reduced by a minimum of 10% and a maximum of 60% in the height or height dimension of the adjacent shank or adjacent shank at the point of maximum cross-sectional reduction. You may be doing it. Therefore, 40% to 90% of the cross-sectional area remains (in the plane perpendicular to the longitudinal direction of the needle) at the thinnest point of the default fracture. Especially when multiple notches enter the shank from different directions (eg, top and bottom), the reduction in cross-sectional area or height is such that the reduction in cross-sectional area or height is distributed over different small portions of the default fracture. It may be (20% from the top, 25% from the bottom). By making the cross-sectional reduction portion of the predetermined fracture portion into a notch shape, a relatively accurately defined position can be obtained in order to separate the hook from the driving portion. Stress concentration is seen at the location of the default rupture. In addition, or instead, it is of course possible to reduce the width of the needle. In this case, in order to reduce the height of the shank, a means equivalent to the above-mentioned means can be used.

The knitting machine needle may have a reduced portion of a shank that is triangular in height and has an opening angle of 60 ° to 120 °. An angle of 90 ° may be particularly advantageous. The three corners formed on the shank may be rounded. If the reduction in the height direction is small, a radius of roundness of at least 0.02 mm is advantageous, and if the reduction in the height direction is large, the radius of roundness may be 0.35 mm or, for example, 0.4 mm. Or even if it is 0.5 mm, it can be advantageously configured. The height reduction may also consist of trapezoids, steps and other geometric shapes. In view of the above information, differences will be apparent, for example, when compared to recesses that function to relieve tension in the loop as it slides over a latch that is in a backward position. This type of depression is flattened with a large opening angle to facilitate loop entry and exit. In contrast, most default fractures are intended to induce a defined fracture at a defined location. The side opening angle of this type of default fracture is correspondingly smaller. In addition, due to the particular shape that favors the default break, it is recommended that this type of default break be placed in a position that is not suitable for the loop relaxation recess. The loop relaxation recess is placed at the position where the loop slides. Due to its shape, the default breaks can "capture" the loop and endanger the knitting process. Therefore, as mentioned above, it is advantageous to place the default fracture portion behind, for example, the position of the tip of the latch in the backward position of the latch. A further consideration that it is preferable to place the predetermined break in the rear part of the needle is the action of the lever. If the loop (here, the loop that is not particularly knocked over) transmits a large force inside the hook, the distance from the hook increases the leverage exerted by this force on the default rupture.

The material of the default fracture portion of the knitting machine needle may be one having a smaller elongation at break than the portion constituting the remaining portion of the shank. The behavior of the knitting machine needle under overload can be selectively controlled by this configuration (in addition to or instead of reducing the height or similar means) of the predetermined fracture. Differences in the degree of plastic deformation that the material undergoes are suppressed due to selective fracture when the load clearly exceeds the design load of the knitting machine needle. Knitting machine needles are advantageously made of steel. In the case of steel, the elongation at fracture can be affected by selectively adjusting the hardness or microstructure. For example, the ultrastructure of the default fracture may be selectively brittle and / or coarse grain.

As mentioned above, breakage of needle beds and cams is common in knitting systems that use elongated knitting machine needles at high speeds. In the present specification, the term "needle bed" is used as a general term for a part of a knitting system that guides a needle during a knitting operation. Specific examples thereof include a knitting cylinder and dial of a circular knitting machine, and a flat needle bed of a flat knitting machine.

German Patent Application Publication No. 3311361 and German Patent Application Publication No. 102014118217 describe methods for further improving the productivity of high-speed knitting machines, and the drawings include suitable knitting machine needles. An example of a typical knitting system is shown. The present invention specifically addresses the improvement of knitting machine needles and knitting systems to meet the high speed requirements described in these publications. These two publications describe a knitting system with knitting needles with a very long and thin shank between the hook and the first bat. According to these two publications, most of this long, thin shank is guided laterally (in the width of the needle) within each needle bed by a sinker rather than the groove wall of the needle bed. The above-mentioned type of knitting system achieves high knitting performance and high fineness at the same time. The contents of the two publications mentioned above are incorporated herein by reference, at least with respect to the shape of the knitting needles used and the placement of the knitting needles and sinkers in the knitting system.

A knitting system according to the present invention includes a needle bed with guiding means and at least one groove bottom. These guiding means and the bottom of the groove are set to receive the knitting machine needle and guide and support the knitting machine needle along its longitudinal direction during its intermittent movement. A needle bed in the form of a cylinder, dial, or a flat needle bed for, for example, a flat knitting machine is preferred. The knitting machine needle is received in the groove by the needle bed, guided by the groove wall in the width direction of the knitting machine needle, and supported by the groove bottom in the negative height direction of the knitting machine needle. Especially in the width direction, the knitting machine needle is not always guided over the entire length, and may be guided only by the rear portion of the knitting machine needle. In other parts of its length, the knitting machine needles may be guided in the width direction by other knitting tools (eg, German Patent Application Publication No. 331,361 and German Patent Application Publication No. 331,361). In the case of a knitting system according to No. 102014118217). The same applies to the support of the knitting machine needle at the bottom of the groove.

The knitting system according to the present invention further includes at least one cam element for transmitting force to at least the first driving portion of the knitting machine needle seated on the needle bed. In many cases, the butt of the knitting machine needle protrudes from the groove of the needle bed and is accepted by the path-shaped groove (cam curve) of the cam element. A circular knitting machine usually has multiple cam elements, each of which is a small distance across by the butt of the needle (of the coupling element) during one full rotation of the needle cylinder of the circular knitting machine. Determine the part. As a result of this relative movement of the needle in the width direction between the needle for the knitting machine and the cam element, the cam element exerts a force to move the needle in its longitudinal direction during the knitting operation on the circular knitting machine. Transmit to the drive part or the butt of the needle.

The object of the present invention includes a knitting system having a large number of knitting machine needles, and each of these knitting machine needles includes the following features as a part thereof.
A hook for forming a loop, which limits the shank in the longitudinal direction of the shank and ends at the tip of the hook, and
-The first drive part that continues from the hook in the longitudinal direction of the shank.
・

A knitting system according to the present invention is characterized in that at least one of the knitting machine needles has a predetermined breaking portion for separating the hook from the first driving portion. The default break is formed by a first portion of the shank that extends longitudinally through the shank. The default break is characterized in that it is entirely located in the first portion of the shank extending longitudinally between the tip of the hook and the first drive portion.

Due to the default rupture, the exceptionally large force acting on the knitting machine needle in the negative height direction will separate the hook from the first drive. As a result, these forces will not be transmitted to the immediate vicinity of the cam element of the shank. This means prevents, or at least reduces, collision-triggered damage to the needle bed and cam elements.

In the knitting system according to the present invention, the guide means of the needle bed and at least one groove bottom may be configured as follows. In this configuration, the position of the drive portion and the position of the predetermined break portion on the at least one cam element and at least one knitting needle are such that at least one knitting needle is at least intermittently from the guiding means during the knitting operation. As a result of the protrusion and elevation, the guiding means is tuned to no longer support the predetermined breaks of at least one knitting machine needle at least intermittently. At least when the knitting machine needle is in the raised state, the default break is above the first cam element. Such specific settings allow precise control of the behavior of the system when an unusually large force is applied to the unsupported portion of the hook or knitting machine needle. Such a large force can act over a relatively long lever from the hook to the predetermined break. The default rupture is approximately located where the needle bed of the raised knitting machine needle begins to support, so there is a high probability that a strictly defined rupture will occur at or during the default rupture. Very expensive. In this regard, it is also important that the position of the default fracture is not too forward in the hook direction. If this is not the case (too forward), the action of the lever may result in an unspecified break at the point where the knitting machine needle is again supported by the needle bed. Also, if the default break is completely within the supported area, undefined breaks can occur at the ends of the needle bed. For example, if the loops are not knocked over and gather on the hook, a large force may be generated when the knitted fabric is taken out. In such a case, the hook may be immediately applied with a take-out force exceeding the normal take-out force (for example, twice or more).

The use of needles in accordance with the present specification is particularly advantageous in the types of knitting systems described in German Patent Application Publication No. 3311361 and German Patent Application Publication No. 102014118217. Advantageously, the knitting system that is the subject of the present invention also has the additional properties of German Patent Application Publication No. 3311361 and German Patent Application Publication No. 102014118217.

FIG. 1 is a diagram showing the entire needle for a knitting machine. FIG. 2 is an enlarged view of the needle for the knitting machine of FIG. FIG. 3 is an enlarged view of another embodiment of a knitting machine needle similar to that of FIG. FIG. 4 is a diagram showing the whole of another embodiment of the needle for a knitting machine. FIG. 5 is an enlarged view of the needle for the knitting machine of FIG. FIG. 6 is an enlarged view of another embodiment of a knitting machine needle similar to that of FIG. FIG. 7 is an enlarged view of the needle for the knitting machine of FIG. 2 with the closed position of the latch and two cross-sectional views added. FIG. 8 is a diagram schematically showing a knitting system according to the present invention.

FIG. 1 is a diagram showing the entire needle 1 for a knitting machine. This figure is not on scale and details not essential to the present invention are omitted. Further figures have been simplified accordingly. For clarity, a coordinate system is added to indicate the direction defined on the knitting machine needle 1, where the longitudinal direction of the knitting machine needle 1 is z, the width direction is y, and the height direction is x. There is. In FIG. 1, the hook 2 is located at the left end of the knitting machine needle 1 in the longitudinal direction z. The knitting machine needle 1 has a butt 5 (also referred to as a driving portion 33) at a position not far from the right end of the knitting machine needle 1 in the longitudinal direction z in FIG. The bat 5 projects above the knitting machine needle 1 along the positive height direction x. All figures show only one bat 5 provided on the knitting machine needle 1. However, in all embodiments, it is conceivable that the knitting machine needle 1 extends further to the right and has one or more additional bats. The shank 3 of the knitting machine needle 1 extends between the hook 2 and the bat 5, clearly showing that the shank 3 has an elongated shape. In this embodiment, the length from the start portion 20 on the hook end side of the knitting machine needle 1 to the start portion 19 on the hook side of the first bat 5 is about 78 mm. For clarity, three parts (10, 11, 13) along the length of the shank 3 of the knitting machine needle 1 are shown in curly braces. The right end of the first portion 10 and the second portion 11 extends to the hook-side starting portion of the first butt 5. The shank 3 is provided with a default break point 9 in the third portion 13 included in the first portion 10 and the second portion 11. This point and further details are shown more clearly in FIG. 2, which is an enlarged view of the left side portion of the knitting machine needle 1.

In the enlarged view of FIG. 2, in particular, the tip 4 of the hook of the needle 1 for the knitting machine and the tip 20 on the hook end side are shown in an easy-to-understand manner. During the knitting operation, the loop of yarn for loop formation is held inside the hook 2 below the tip 4 of the hook. The latch 6 is shown at the rearward position 8, which also serves to form a loop. At this position, the tip 12 of the latch reaches the point maximally oriented towards the butt 5 (also referred to as the drive portion 33) in the longitudinal direction z. The latch 6 is pivotally supported by the shank 3 at the pivot point 14. The shank 3 has a predetermined break portion 9, which is provided with a notch or recess that reduces the height of the shank or the height dimension of the shank along the height direction x from above. There is. This recess is triangular and has a rounded tip. This triangle surrounds a 90 ° angle (“opening angle”) at the rounded tip. The height of the shank 3 is reduced by about 50% at the point where the remaining cross-sectional area is the smallest.

FIG. 3 basically corresponds to FIG. 2, except that it shows another embodiment of the default fracture portion 9. The magnitude of the reduction in the cross-sectional area is smaller than that of the embodiment of FIG. The roundness at the tip of the recess formed in the default fracture is either absent or too small to be represented in this figure. In each embodiment, the tip of the formed recess may be rounded. Further, the corners formed on the left and right of the predetermined broken portion 9 at the upper edge portion of the shank 3 may also be rounded in all embodiments.

FIG. 4 is a diagram showing the whole of a further embodiment of the knitting machine needle 1. Except for another configuration of the default break portion 9, the knitting machine needle 1 substantially corresponds to the knitting machine needle 1 of FIG. Further, a first transition point 28 and a second transition point are shown, and a fourth portion 30 of the shank 3 and a fifth portion 31 of the shank 3 are shown in curly braces. The height of the shank 3 (dimension in the height direction x) is maximum from the bat 5 to the first transition point 28. After the first transition point 28, the height of the shank 3 drops sharply towards the hook 2 of the shank 3 to a medium height. The height of the shank 3 decreases again towards the hook 2 after the second transition point 29. The fourth portion 30 of the shank 3 extends from the pivot point 14 of the latch 6 to the second transition point 29 along the longitudinal direction z of the knitting machine needle 1. The fifth portion 31 of the shank 3 extends from the tip 12 of the latch 6 at the rearward position 8 to the second transition point 29 along the longitudinal direction z of the knitting machine needle 1. The minimum height of the shank 3, and thus the appropriate position for the default break point 9, may be determined by both of these parts. Since the portion between the second transition point 29 of the shank and the first drive portion 33 has a large shank height, this portion of the shank provides the optimum position for the default fracture portion 9. It's not a thing.

The default fracture portion 9 is clearly shown in the enlarged view of FIG. The knitting machine needle 1 of FIG. 5 is essentially different from the knitting machine needle 1 of FIGS. 2 and 3 only in the configuration of the predetermined breaking portion 9. The default break portion 9 is formed by reducing the height of the shank 3 from below in the height direction x. This "from below" reduction is, in all other respects, the same configuration as the "from above" reduction shown in FIG. In all embodiments of the knitting machine needle 1, the reduction in shank diameter can always be carried out advantageously from top, bottom, or top and bottom. Alternatively, or in combination with it, a reduction in the width direction y can also be used. FIG. 5 further shows the side surface 25, the height reduction shape 26 of the shank height dimension in the zx plane, and the height reduction opening angle 27.

FIG. 6 is an enlarged view of the front region of the knitting machine needle 1, and the knitting machine needle 1 is the knitting machine needle 1 shown in FIGS. 1 to 5 except for the method in which the predetermined broken portion 9 is realized. Is basically supported. In this embodiment, the default fractured portion 9 is formed by a cross section of a shank 3 whose cross-sectional area is not adjusted to form the predetermined fractured portion 9. Instead, the material properties of the default breaks 9 have changed (this is symbolically shown by the hatching of the shank 3 at the default breaks 9), especially from the adjacent portions 23, 24 of the shank 3. However, the elongation at break is small. This kind of adjustment of material properties at a predetermined fracture portion 9 may be used advantageously in all embodiments of the invention in place of or in combination with other means such as reduction of cross-sectional area. can.

FIG. 7 basically corresponds to FIG. For clarity, the latch 6 of the knitting machine needle 1 of FIG. 7 is shown at its extreme positions. That is, the latch is shown in both the closed position 7 and the backward position 8. Adjacent portions 23, 24 to the default fracture portion are also shown.

Further, in FIG. 7, cross-sectional lines AA and BB are shown at two positions of the shank 3. Related cross-sections are arranged on the right side of the knitting machine needle 1 in FIG. 7, one showing a non-reduced cross-section 22 of the shank and the other showing a reduced cross-section 21 of the shank. These cross-sectional views show a first bat 5, a first transition point 28, and a second transition point 29 in the background.

FIG. 8 shows a cross section through the groove of the needle bed 16 of the knitting system 15 according to the present invention. The cutting line in this figure is parallel to the side wall of the needle 1 in the width direction and exists immediately in front of the side wall. The knitting system 15 is similar to the knitting system described in German Patent Application Publication No. 3311361 and German Patent Application Publication No. 102014118217. The drawings are not on scale and the essential components of the knitting process, such as additional knitting tools (especially sinkers), are omitted. As described above, the omitted sinker guides the knitting needle 1 in the width direction y at the portion of the knitting needle 1 in the longitudinal direction z in front of the groove wall 17. Therefore, the sinker adjacent to the needle 1 is usually partially visible behind the needle 1. The knitting machine needle 1 is two-dimensionally guided by the guiding means 17 of the needle bed 16. The knitting machine needle 1 is supported by the bottom portion (groove bottom) of the groove 32 of the needle bed 16 in the height direction x. The knitting machine needle 1 is guided in the width direction y by the two groove walls 17. In FIG. 8, only one groove wall 17 of the needle bed 16 is shown, and the groove wall 17 guides the rear portion of the knitting machine needle 1 on which the butt 5 is located in the width direction y (as described above). , The sinker that takes over the guidance function in front of the groove is omitted). The butt 5 of the knitting machine needle 1 engages with the cam element 18 shown in cross section. The knitting machine needle 1 is not supported in the height direction x by the needle bed 16 toward the front of the needle 1 at the illustrated position in the needle bed 16, particularly from the hook 2 to the predetermined break portion 9. Such a situation occurs at least when the knitting machine needle 1 is raised to the maximum during the knitting operation in the knitting system 15 according to the present invention. The default break is when the needle 1 is in an elevated position where the needle bed 16 or other knitting machine component no longer guarantees support for the default break 9 or at least most of the hook end of the needle in front of it. Especially, it is easy to happen. This is all the more so because at the load position shown, the front portion of the needle 1 having the hook 2 is likely to break, resulting in a predetermined break due to the force F. This fold is facilitated by the length of the lever (here, the distance from the default fracture portion 9 of the hook 2) (the action of the lever).

1: Knitting machine needle 2: Hook 3: Shank 4: Hook tip 5: Butt, 6: Latch, 7: Closed position, 8: Latch 6 backward position, 9: Latch 6 default break 10,: 1st part of shank 3, 11: 2nd part of shank 3, 12: tip of latch, 13: 3rd part of shank 3, 14: pivot point of latch 6, 15: knitting system, 16: Needle bed, 17: Guide means, 18: Cam element, 19: Start of hook side of first bat 5, 20: Hook end start position of needle 1 for knitting machine, 21: Reduced cross section of shank, 22: Shank cross section, 23: portion adjacent to the default break portion 9, 24: portion adjacent to the default break portion 9, 25: side surface, 26: shape of height reduction of the shank height dimension in the zx plane. , 27: Height reduction opening angle, 28: 1st transition point, 29: 2nd transition point, 30: 4th part of shank 3, 31: 5th part of shank 3, 32: Needle bed Bottom of 16 grooves 32, 33: driving part, F: force, x: height direction, y: width direction, z: longitudinal direction

Claims (14)

A hook (2) for forming a loop, which limits the shank (3) in the longitudinal direction (z) of the shank (3) and ends at the tip (4) of the hook.
A knitting machine needle (1) comprising at least a first driving portion (33) extending from the hook (2) to the longitudinal direction (z) of the shank (3).
The default breaking portion (9) for separating the hook (2) from the first driving portion (33) is
Formed by a portion of the shank (3) and extending in the longitudinal direction (z) of the shank (3).
The predetermined broken portion (9) is a first of the shank extending in the longitudinal direction (z) of the shank (3) between the tip (4) of the hook (2) and the first driving portion (33). A needle (1) for a knitting machine, characterized in that the whole is arranged in a portion (10) of 1. The default fractured portion (9) is
It breaks when a force smaller than 80% of the force acting on the hook (2) is applied.
The needle for a knitting machine according to claim 1, wherein the force acting on the hook (2) is a force that permanently deforms a needle for a knitting machine having the same structure that does not have the predetermined breaking portion (9). (1). In the latch (6), the inside of the hook (2) is closed in the closed position (7), and the tip of the latch is in the longitudinal direction of the shank (3) in the backward position (8) of the latch (6). The needle for a knitting machine according to claim 1 or 2, wherein a latch (6) is pivotally supported by the shank (3) so as to face the first driving portion (33) along (z). (1). The default break portion (9) is entirely disposed in the second portion (11) of the shank.
The second portion (11) of the shank is the position of the tip (12) of the latch in the backward position of the latch (6) and the hook-side start portion (19) of the first drive portion (33). The knitting machine needle (1) according to claim 3, wherein the shank extends in the longitudinal direction (z) between the two. The default break portion (9) is entirely disposed in the third portion (13) of the shank.
The third portion of the shank is 1 in the direction from the pivot point (14) of the latch (6) to the first drive portion (33) along the longitudinal direction (z) of the needle (1) for the knitting machine. .Starting from a position spaced from 5 latch lengths to 2.5 latch lengths,
An interval of 3 latch lengths to 4 latch lengths from the pivot point (14) of the latch (6) to the first driving portion (33) along the longitudinal direction (z) of the knitting machine needle (1). End at the open position,
The knitting machine needle (1) according to claim 3 or 4, wherein the latch length is a distance between the pivot point (14) of the latch and the tip end (12) of the latch. ). The hook-side start portion (19) of the first drive portion (33) is a longitudinal direction (z) of the shank (3) from the hook-side start portion (20) of the knitting machine needle (1). The knitting machine needle (1) according to any one of claims 1 to 5, wherein the needles (1) are arranged at a distance of at least 75 mm. The driving portion (33) is formed by a butt (5), which projects above the shank (3) in the positive height direction (x) of the shank (3). The needle for a knitting machine (1) according to any one of claims 1 to 6, which is characterized. The knitting machine according to any one of claims 1 to 7, wherein the predetermined broken portion (9) includes a reduced portion (21) having a cross section perpendicular to the longitudinal direction (z) of the shank. Needle (1). The predetermined broken portion (9) is characterized by including the reduced portion (21) in which the cross section (22) of the shank is reduced by reducing the dimension of the shank in the height direction (x). The needle for a knitting machine according to claim 8 (1). In the predetermined broken portion (9), the dimension of the shank in the height direction (x) is reduced by at least 10% and at most 50% at the place where the cross section (22) of the shank is reduced to the maximum. The knitting machine needle (1) according to claim 9. The reduction in the height (x) dimension of the shank has a triangular or trapezoidal shape (26) in the plane defined by the height direction (x) and the longitudinal direction (z), both sides of the shape. The knitting machine needle (1) according to claim 9 or 10, wherein the faces (25) take a range surrounding an opening angle of 60 ° to 120 ° with respect to each other. The predetermined fractured portion (9) is at least partially in the predetermined fractured portion (9) of the shank (3) rather than the other portions (10, 11, 13) of the shank (3). The knitting machine needle (1) according to any one of claims 1 to 11, wherein the needle (1) contains a material having a smaller elongation at break than the adjacent portions (23, 24). The guiding means (17) and at least one groove bottom (32) accept the knitting machine needle (1) and hold the knitting machine needle during the intermittent operation of the knitting machine needle in the longitudinal direction (z). Needle bed (16), with guiding means configured to support and guide and at least one groove bottom.
At least one cam element (18) for transmitting force to at least the first drive unit (33) of the knitting machine needle (1) seated on the needle bed (16), and.
A large number of the knitting machine needles (1), and each of these knitting machine needles (1) is a part thereof.
A hook (2) for forming a loop, which limits the shank (3) in the longitudinal direction (z) of the shank (3) and ends at the tip (4) of the hook.
In a knitting system (15) comprising at least a number of the knitting machine needles (1), including a first driving portion (33) from the hook (2) to the longitudinal direction (z) of the shank (3). There,
At least one of the knitting machine needles (1) has a predetermined breaking portion (9) for separating the hook (2) from the first driving portion (33).
The predetermined fracture portion (9) is formed by the first portion (10) of the shank (3) and extends in the longitudinal direction (z) of the shank (3).
A second of the shank (3) extending in the longitudinal direction (z) of the shank (3) between the tip of the hook (2) and the hook-side start portion (19) of the first drive portion (33). A knitting system (15) characterized in that the whole is arranged in a portion (10) of 1. The guide means (17) and at least one groove bottom (32) of the needle bed (16), at least one cam element (18), and the driving portion of at least one knitting machine needle (1). The position of (33) and the position of the predetermined broken portion (9) are
During the knitting operation, at least one knitting machine needle (1) rises at least intermittently so as to protrude from the guide means (17) and at least one groove bottom (32).
The guiding means (17) and the at least one groove bottom (32) are set so as not to support the predetermined breaking portion (9) of the at least one knitting machine needle (1) at least intermittently. The knitting system (15) according to claim 13, wherein the knitting system is characterized by the above.

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