JP2016121418A - Knitting method and knitting machine using sinker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a knitting method and a knitting machine which reduce the wear of a sinker top caused by yarn drawing-in operation at the time of loop formation using a sinker, thereby achieving the extension of the service life of the sinker at low cost.SOLUTION: According to the present invention, a fabric is knitted by moving a sinker 2 for assisting loop formation, arranged on each adjacent side of a knitting needle 1 supplied with a yarn, in a horizontal direction X by using a plurality of sinker cams 7 with respect to the knitting needle 1 moved in a vertical direction Z. The sinker 2 has a plurality of different stroke quantities in the horizontal direction X, so that a position on a sinker top 4 for drawing in a yarn 11 in the sinker 2 is held at a plurality of different positions.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a knitting method using a sinker for assisting loop formation and a knitting machine such as a circular knitting machine, and more particularly to prevention of wear of a sinker top due to contact with a yarn.

  Generally, in a knitting machine such as a circular knitting machine having a sinker used for assisting loop formation, a knitting needle and sinker are used in all feeders except for some special knitting machines in order to form a uniform loop. Performs the same operation. A sinker is a knitting tool that directly assists loop formation with a knitting needle. There are various shapes such as a small section and a larger one than a knitting needle. There are things that work. A feeder is a certain area from the yarn feeder to the knitting needle until the stitch (stitch) is formed. The same needle cam, sinker cam, etc. are arranged in each feeder. Of course, the sinker and the like perform the same operation. As a result, a uniform loop is formed in all feeders.

  As shown in FIG. 6, in the knitting machine, the sinker 2 is positioned on both sides of the knitting needle 1 to be fed, and the knitting needle 1 and the sinker 2 are alternately arranged along the circumferential direction. The knitting needle 1 moves in a vertical direction (vertical direction) Z by rotation of a needle cylinder (not shown) (hereinafter simply referred to as a cylinder) in which a plurality of knitting needles 1 are slidably accommodated in a needle groove. The sinker 2 moves back and forth in the horizontal direction (for example, the horizontal direction) X so that the sinker top 4 which is a horizontal surface provided above the center of the cylinder and intersects with each other, for example, is orthogonal. Repeat the same operation for each feeder.

  That is, in each feeder, the knitting needle 1 holds the yarn supplied by a yarn feeding unit (not shown) at a position above the sinker 2 by the hook 1a, and then the knitting needle 1 is lowered and lowered from the sinker top 4 as it is. Since the hook 1a pulls down the yarn, as a result, a yarn loop is formed by the three points of the sinker top 4 of the sinker 2 adjacent to the knitting needle 1 and the hook 1a of the knitting needle 1. When knitting a plain structure such as a knitted knitted fabric, the distance between the sinker top 4 on the knitting machine and the hook 1a of the knitting needle 1 at this time is kept constant by all the feeders, thereby making a uniform loop Can be generated. When the knitting needle 1 pulls down the yarn, the yarn is pulled by the knitting needle 1 and passes while contacting the sinker top 4.

  By the way, when the position of the sinker 2 maintains the same movement in all the feeders, as shown in FIG. 7, in the operation of being drawn through the horizontal plane of the sinker top 4 by the knitting needle 1 at the time of loop formation, Since the knitting needle 1 and the sinker 2 repeat the same movement synchronously and repeatedly in the feeder, the knitting needle 1 and the thread 11 come into contact when the hook 1a of the knitting needle 1 pulls the thread 11, and the thread 11 is on the sinker top 4 in any feeder. Pass through the same position of the head repeatedly. In this case, wear occurs on the sinker top 4 due to sliding friction that repeatedly occurs between the yarn 11 and the sinker top 4 depending on the properties and tension of the yarn 11.

  As shown in FIG. 8, when the wear is large, a concave recess 6 is generated in the sinker top 4. When the concave recess 6 is generated, the distance between the sinker top 4 and the hook 1a of the knitting needle 1 is not constant, and the loop shape formed in this portion is not uniform, resulting in a decrease in knitted fabric quality. Furthermore, if the concave depression 6 becomes large, the yarn may be caught in the depression 6 and the yarn may be broken to make knitting impossible.

  Synthetic yarns called dull yarns that have been surface-treated with a matte material have been used for the purpose of UV-cutting and non-gloss effects to prevent see-through. Dull yarns are subject to high friction due to the addition of matting agents such as titanium oxide, and are subject to wear. When dull yarn is used in a circular knitting machine, the dull yarn and sinker repeatedly contact at the same position on the sinker top, resulting in significant wear and frequent replacement of the sinker, resulting in a short service life. . The problem is that the manufacturing and maintenance costs increase due to the frequent replacement.

  Conventionally, as disclosed in Patent Document 1, as measures for preventing this wear, there are known measures such as creating a sinker with a material having high wear resistance and increasing the hardness of the sinker top portion by a coating process or the like.

  Further, as in Patent Document 2, by providing an area with reduced thickness on the sinker nose (see FIG. 7), which is the working part of the sinker, a gap space is created on both sides of the sinker to contact the knitting needle and the sinker. It is also known to reduce wear and sinker wear.

Japanese Utility Model Publication No. 7-38169 JP 2011-241532 A

  However, the coating process as in Patent Document 1 requires equipment and technology for that purpose, and requires a coating process in addition to a normal sinker manufacturing process, which requires manufacturing costs and time. Patent Document 2 mainly reduces wear due to friction between the sinker nose portion and the knitting needle, and is not very effective for wear of the sinker top, and the manufacturing cost is high. There are difficulties in the method.

  The present invention solves the above-described problems, reduces the wear of the sinker top that occurs during the pull-in operation of the yarn when forming a loop using the sinker, and realizes a long lifetime of the sinker at a low cost. An object is to provide a knitting method and a knitting machine.

  A knitting method using a sinker according to one configuration of the present invention includes a sinker that is arranged on both sides of a knitting needle to be fed and assists in forming a loop in a lateral direction by a plurality of sinker cams with respect to the knitting needle that moves in a longitudinal direction. The sinker has a plurality of different lateral stroke amounts so that the positions on the sinker top for drawing the yarn in the sinker are at a plurality of different positions. Retained. Here, the horizontal direction is a direction including a horizontal direction orthogonal to the vertical direction (vertical direction) and a direction inclined by a predetermined angle from the horizontal direction, and is, for example, a center direction of a cylinder of a circular knitting machine. is there. The stroke amount refers to the distance from the sinker position when the knitting needle pulls the yarn through the sinker top to the sinker position when the knitting needle is most advanced in the lateral direction when the center direction of the cylinder of the circular knitting machine is the front. .

  According to this configuration, since the sinker has a plurality of different stroke amounts, the position on the sinker top where the knitting needle draws the yarn through the sinker top changes accordingly. Unlike the case where the friction is concentrated at the same location, the friction is distributed to a plurality of locations on the sinker top, and wear is reduced accordingly. As a result, the wear of the sinker top that occurs during the pull-in operation of the yarn during loop formation in the knitting machine can be reduced, and the lifetime of the sinker can be extended at a low cost.

  A sinker cam device according to another configuration of the present invention includes a sinker arranged on both sides of a knitting needle to be fed to assist loop formation, and a plurality of feeders that are regions where stitches are formed by the knitting needle. A plurality of sinker cams that move in the lateral direction with respect to the knitting needles that move in the longitudinal direction, and the sinker has a plurality of different lateral stroke amounts, thereby pulling the yarn in the sinker on the sinker top Are held at a plurality of different positions.

  According to this configuration, since the sinker has a plurality of different stroke amounts, the position on the sinker top where the knitting needle draws the yarn through the sinker top changes accordingly. Unlike the fact that the friction of the sinker top is concentrated at the same location, the wear is reduced by that amount. As a result, the wear of the sinker top that occurs during the pull-in operation of the yarn during loop formation in the knitting machine can be reduced, and the lifetime of the sinker can be extended at a low cost.

  Preferably, a plurality of distances from a position when the sinker is most advanced in a cam race of the plurality of sinker cams to a position where the knitting needle pulls the yarn through the sinker top so that the stroke amount of the sinker is different. Are formed at different distances. In this case, for example, the position of the sinker cam race of the plurality of sinker cams when the sinker is most advanced and the position at which the knitting needle pulls the yarn through the sinker top are displaced laterally back and forth, so that the sinker stroke can be easily performed. The amount can be different.

  A circular knitting machine using a sinker according to still another configuration of the present invention uses the sinker cam device to rotate a cylinder in which the knitting needle is accommodated in a needle groove, thereby knitting a tubular knitted fabric. It has. Therefore, since the wear of the sinker top generated by the yarn pull-in operation during loop formation in the circular knitting machine can be reduced, a circular knitting machine having a sinker cam device having a long service life at low cost can be obtained.

  According to the present invention, since the sinker has a plurality of different stroke amounts, the position where the knitting needle pulls the yarn through the sinker top also changes, and therefore, the friction points with the yarn on the sinker top are dispersed in a plurality, and the wear Is reduced. As a result, the wear of the sinker top that occurs during the pull-in operation of the yarn during loop formation in the knitting machine can be reduced, and the lifetime of the sinker can be extended at a low cost.

It is a front view which shows the circular knitting machine using the sinker which concerns on one Embodiment of this invention. (A), (B) is a side view which shows the stroke amount of the sinker in the knitting method using the sinker in a present Example. (A) is an arrangement diagram showing sinker cams that vary the stroke amount of the sinker in this embodiment, and (B) and (C) are slides in which the yarn fed by the difference in stroke amount contacts and slides in this embodiment. It is a side view which shows the example from which the position on the sinker top to perform differs. It is a side view which shows the some contact position of the thread | yarn in the sinker top of the sinker from which a stroke amount differs for every feeder in a present Example. It is a perspective view which shows a sinker top abrasion test. It is a perspective view which shows the positional relationship of a knitting needle and a sinker. It is a side view showing the state where the supplied yarn slides on the sinker top. It is a side view which shows the state which the conventional sinker top was worn out by the sliding friction with the thread | yarn.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a knitting machine such as a circular knitting machine 10 using a sinker according to an embodiment of the present invention. The circular knitting machine 10 includes a knitting unit 12 for knitting a tubular knitted fabric using a sinker cam device S described later, and a winding unit 13 for winding the knitted tubular knitted fabric. Yes.

  In FIG. 1, the knitting unit 12 is installed above a bed 22 supported by a plurality of legs 21. A plurality of posts 24 are erected on the bed 22, and a horizontal member 25 is fixed to the upper part by a connecting member. The yarn supplying section 9 is supported on the horizontal member 25. The knitting unit 12 rotates a cylinder in which a plurality of knitting needles (not shown) are slidably accommodated in a needle groove by driving by a main motor 15 via a transmission means (not shown), and supplies the yarn 11 from the yarn supplying unit 9 to the knitting needles. Then pile the stitches in a spiral to create a tubular knitted fabric. A winding unit 13 including a plurality of winding rollers that winds the knitted fabric is installed below the bed 22.

  FIGS. 2A and 2B are side views showing the stroke amount of the sinker in the knitting method using the sinker 2 in the present embodiment. In addition to the sinker top 4 provided on the center direction side (front side) of the cylinder of the circular knitting machine 10, the sinker 2 has a bat 3 provided on the opposite side (rear side) and protruding in a convex shape. The bat 3 is slidably fitted into the cam race (groove) 8 of the sinker cam 7. The sinker cam device S is constituted by the sinker 2 and the sinker cam 7.

  In the raceway machine of the circular knitting machine 10, for example, when the center direction of the cylinder of the circular knitting machine 10 is the front, FIG. 2 (A) is the sinker position when the most advanced, and FIG. 2 (B) is the most retracted. The sinker position at the time, that is, the outermost position when viewed from the center of the knitting machine. In the present embodiment, since the knitting needle pulls the yarn at the sinker position when it is most retracted, the position of the cam race 8 of the sinker cam 7 at the sinker position when it is most retracted is displaced in the lateral direction X. The stroke amount of 2 is varied to a plurality.

  In the present embodiment, the position of the cam race when moving forward most as shown in FIG. 2A in each sinker cam is the same in all sinker cams. As a result, when the sinker retracts most, the yarn is pulled in, so that the position where the friction between the sinker and the yarn occurs is at a different position on the sinker top. In addition, although the knitted fabric quality may be affected depending on how the tip of the sinker and the knitted fabric come into contact with each other, in this embodiment, the most advanced position is the same in all the sinker cams. The method of contact of the knitted fabric is almost the same for all feeders, and has little effect on the quality of the knitted fabric.

  FIG. 3A is an array diagram showing the sinker cam 7 that varies the stroke amount of the sinker 2 for each of the feeders 5-1 to 5-5 in the present embodiment, and FIGS. 3B and 3C are stroke amounts in the present embodiment. It is a side view which shows the example from which the position of the sinker top 4 to which the thread | yarn 11 supplied by contact | movement moves while contacting is different. As shown in FIG. 3A, the sinker 2 has its bat 3 moved in the cam race (groove) 8 of each sinker cam 7 and moved back and forth in the lateral direction X. It moves along the circumferential direction (arrow line direction) Y in the cam race (groove) 8 of all sinker cams 7 and moves in the circumferential direction Y over 5-5. That is, the sinker 2 moves in the lateral direction X and the circumferential direction Y as the cylinder rotates.

  As shown in FIG. 3C, when the hook 1a of the knitting needle 1 holds the yarn 11 and falls below the sinker top 4 and draws the yarn 11, the sinker 2 moves backward and sinkers of the sinkers 2 on both sides of the knitting needle 1 are retracted. The knitting needle 1 descends between the tops 4, and the hooks 1 a of the knitting needles 1 pull the yarn 11, so that the yarn 11 passes through the position closest to the knitting needle 1 on the sinker top 4.

  At this time, a plurality of types of sinker cams 7 having different stroke amounts of the sinker 2, which are distances from the most advanced position of the sinker 2 in FIG. 2A to the most retracted position in FIG. When the knitting machine 1 is installed in all the feeders 5 of the knitting machine 10 to perform the knitting operation, the position on the sinker top where the knitting needle 1 is lowered and the yarn 11 is pulled in is changed. Wear is reduced.

  That is, if the stroke amount of the sinker 2 increases or decreases, the position at which the knitting needle 1 draws the yarn 11 through the sinker top 4 also changes by the increase / decrease amount, so the closest position from the knitting needle 1 on the sinker top 4 also changes. The thread 11 passes through different positions on the sinker top 4 for each of the feeders 5-1 to 5-5. As a result, the friction between the yarn and the sinker top concentrated on the same location in all the feeders 5 as in the prior art is dispersed in a plurality of locations according to the present invention, and the conventional yarn repeatedly slides at the same position. As a result, the wear of the sinker top 4 that has occurred is reduced.

  In the present embodiment, in the 90-feeder circular knitting machine having a cylinder diameter of 30 inches, as shown in FIG. 3A, each of the five first to fifth feeders 5-1 to 5-5 The sinker cams 7 are arranged so that the stroke amount in the operation in the direction Y is different by 0.25 mm within a total width of 1 mm. A plurality of sinker cam arrays of the five first to fifth feeders 5-1 to 5-5 are arranged. It is repeatedly installed in all yarn feeders of the circular knitting machine 10.

  When the knitting operation is performed using the circular knitting machine 10 in which such a sinker cam arrangement is performed, the knitting needle 1 passes through the sinker top 4 in each feeder from the first feeder 5-1 to the fifth feeder 5-5. The position where the yarn 11 is drawn differs by 0.25 mm, and the drawing operation of the yarn 11 on the sinker top 4 is performed at five locations within the 1.0 mm width, and the position where the yarn 11 on the sinker top 4 passes is Each shifts.

  FIG. 3B shows the sinker position when the feeder 5-1 has the largest stroke amount in FIG. 3A, and FIG. 3C shows the smallest stroke amount in FIG. This is the sinker position when it is most retracted in the feeder 5-5.

  FIG. 4 shows a position where the yarn 11 in this embodiment slides on the sinker top 4, and five yarns 11 are arranged in the lateral (front-rear) direction X by the first to fifth feeders 5-1 to 5-5. Position. Therefore, in the 90 feeder, each of the feeders 5-1 to 5-5 passes 18 times per one rotation of the cylinder, and passes 90 times per one rotation of the cylinder at one position like the conventional stroke. Compared to, the number of friction is 1/5. Thereby, the useful life of the sinker 2 in the present invention is at least five times longer than the conventional one.

  At this time, since the sinker top 4 holds a horizontal surface of the same height, the distance of the yarn 11 from the hook 1a to the sinker top 4 does not change regardless of the position on the sinker top 4 where the yarn 11 passes. . For this reason, the increase / decrease of the stroke amount of the sinker 2 hardly affects the size of the loop, and does not cause the nonuniformity of the loop.

  In this way, by using multiple types of sinker cams that vary the amount of stroke of the sinker, wear due to sliding friction with the sinker top thread is reduced even if the normal sinker is used as it is without coating treatment. The period is improved. In addition, since the wear of the sinker top is reduced, the degree of warp occurrence due to non-uniformity of the loop is reduced, and stable and good knitted fabric quality can be provided. As a result, the sinker can be used as it is without being coated, and the coating process and the equipment and technology for the coating process are not required, so that the manufacturing cost and time can be reduced. Furthermore, since the service life of the sinker is extended, the frequency of replacement is reduced, and the maintenance cost and time can be reduced.

  Generally, since the distance and dimensions of each part in the knitting part affect the quality of the knitted fabric, there is a fixed concept that the movement of the sinker and the knitting needle should naturally be the same in all the feeders. Is a thing in which the sinker 2 has a plurality of different stroke amounts and overturns the fixing concept.

  It should be noted that the feeder 4 does not have to be repeated every 5 feeders as in this embodiment, and any number such as every 4 feeders or every 6 feeders may be used, and the same number of each cam does not necessarily have to be provided. , The same arrangement may be irregularly arranged without being repeated. Further, the stroke amount of the sinker 2 does not have to be different by 0.25 mm, and may be an arbitrary value such as 0.2 mm or 0.15 mm. Further, the stroke amount may not be decreased sequentially from the first feeder, and may be increased, or the increase / decrease value may not be a constant amount. For example, the second feeder is decreased by 0.75 mm, and then The third feeder may be increased or decreased by 0.5 mm, and the next fourth feeder may be decreased by 0.25 mm.

  The present invention can be used not only for raceway machines, but also for example, pile machines, fleece machines, striper machines, computer jacquard machines, etc., whether single knit or double knit, and a sinker as in this embodiment. The present invention can be used as long as it is a knitting machine that uses a sinker regardless of whether it moves in a horizontal direction or in a direction inclined obliquely by a swing operation or the like.

[Test tools and test data]
FIG. 5 shows a schematic view of a sinker top wear test tool. As shown in this figure, using a test tool that reciprocates the sinker forward and backward, and under normal conditions where the sinker wears in 24 hours, a plurality of different stroke amounts are applied to the sinker as in the present invention. An experiment was conducted to confirm the effect of reducing wear when provided.

  First, a polyester processed yarn SD110Dtex48F was allowed to run on a sinker top of a sinker having a thickness of 0.2 mm. The polyester processed yarn was run using a process of being wound by a winder, and the running speed was set to 125 m / min. Further, the yarn tension during running of the yarn was increased to about 80 g. These conditions are set strictly to such an extent that actual knitting is impossible in order to promote wear of the sinker top.

  Under such test conditions, the test was first performed with the position of the sinker in the X direction fixed, that is, with a constant stroke amount as in the prior art. A concave depression of 15 mm was generated.

  On the other hand, under the same conditions, as in the present invention, the stroke amount of the sinker was set to 1 mm width, and the test was performed by performing an operation of moving within the 1 mm range at random 250 times per minute in the front-rear direction. No wear on the sinker top was seen after 24 hours. The test was further continued, and after 48 hours, the corners of the sinker top end face were slightly rounded and worn, and there was no wear enough to change the height of the sinker top. .

  As described above, in the present invention, since the sinker has a plurality of different stroke amounts, the position at which the knitting needle pulls the yarn through the sinker top changes accordingly. Unlike the fact that the friction of the top is concentrated at the same location, it is distributed at multiple locations on the sinker top, and wear is reduced accordingly. As a result, the wear of the sinker top that occurs during the pull-in operation of the yarn during loop formation in the knitting machine can be reduced, and the lifetime of the sinker can be extended at a low cost.

  As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily consider various changes and modifications within the obvious scope by looking at the present specification. Accordingly, such changes and modifications are to be construed as within the scope of the invention as defined by the appended claims.

1: Knitting needle 2: Sinker 3: Bat 4: Sinker top 5: Feeder 7: Sinker cam 8: Cam race (groove)
10: Circular knitting machine 11: Yarn 12: Knitting part S: Sinker cam device X: Lateral direction (horizontal direction)
Y: Sinker moving direction Z: Vertical direction (vertical direction)

Claims (6)

A knitting method for knitting a knitted fabric by moving a sinker, which is arranged on both sides of a knitting needle to be fed and assists loop formation, by a plurality of sinker cams with respect to the knitting needle moving in the vertical direction. There,
A knitting method using a sinker, wherein the sinker has a plurality of different lateral stroke amounts, whereby positions on the sinker top for drawing the yarn in the sinker are held at a plurality of different positions. A sinker that is arranged on both sides of the knitting needle to be fed to assist loop formation, and a plurality of feeders that are regions in which stitches are formed by the knitting needle in a direction transverse to the knitting needle that moves the sinker in the vertical direction With a plurality of sinker cams that move each,
A sinker cam device, wherein the sinker has a plurality of different lateral stroke amounts, whereby positions on the sinker top for drawing the yarn in the sinker are held at a plurality of different positions. In claim 2,
A plurality of different distances from a position when the sinker is most advanced in a cam race of the plurality of sinker cams to a position where the knitting needle pulls the yarn through the sinker top so that the stroke amount of the sinker is different. A sinker cam device formed of In claim 3,
A sinker cam device in which the position when the sinker is most advanced is the same in all sinker cams, and the positions at which the knitting needle pulls the yarn through the sinker top are a plurality of different positions. In claim 4,
A sinker cam device in which the position where the knitting needle pulls the yarn through the sinker top is the position where the sinker is most retracted. A sinker comprising a knitting portion that uses the sinker cam device according to any one of claims 2 to 5 and rotates a cylinder in which the knitting needle is accommodated in a needle groove to knitting a tubular knitted fabric. Use circular knitting machine.

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