JP6465742B2 - Flat knitting machine with moving yarn guide - Google Patents

Description

  The present invention relates to a flat knitting machine including a moving yarn guide.

  The applicant has proposed that a movable yarn guide be taken by a carriage of a flat knitting machine (Patent Document 1 JPH08-176942). The yarn guide moves along the yarn path rail of the flat knitting machine and supports the knitting yarn fed from the end of the flat knitting machine to the yarn feeder in the middle. Then, the yarn guide is entrained by the carriage to prevent the knitting yarn from sagging or shaking.

  The applicant further proposed that, with respect to yarn feeding with a flat knitting machine, a desired amount of knitting yarn is actively sent out by a roller, and a tension generator is used to suppress fluctuations in tension applied to the knitting yarn ( Patent Document 2 WO2010 / 143498). With respect to the knitting yarn pulled out from a yarn source such as a cone, the knitting yarn is sent out by a roller of a servo motor drive, and an amount of knitting yarn necessary for knitting is supplied to the yarn feeder. Further, in order to suppress the tension fluctuation of the knitting yarn, a change in the tension is predicted from the knitting data, and the tension applied to the yarn is adjusted by the torque generator.

  The applicant examined in Patent Document 3 (JP2014-169518) that the sizes of stitches differ between transfer and set-up. Then, it has been proposed that the stitch size is made uniform by changing the stitch cam value between the setting and setting.

  If it is made like patent document 2, the fluctuation | variation of the tension | tensile_strength added to a knitting yarn can be made small. However, if the knitting with a flat knitting machine is further speeded up or the knitted fabric is knitted with a weaker knitting yarn, the techniques of Patent Documents 1 to 3 may break the knitting yarn because excessive tension is applied.

  Patent Document 4 (EP2813608A) proposes that a self-propelled yarn guide is provided and that the yarn guide always precedes the yarn feeder. Then, the yarn guide supplies the knitting yarn already drawn from the yarn source to the yarn feeder, thereby preventing fluctuations in the tension of the knitting yarn.

JPH08-176942 WO2010 / 143498 JP2014-169518 EP2813608A

  If the yarn guide is run in advance and the knitting yarn is pulled out and then the carriage and the yarn feeder are moved to perform knitting, the knitting efficiency decreases due to the movement time of the yarn guide. Therefore, it is necessary to reduce the variation in the tension of the knitting yarn while preventing a decrease in the knitting efficiency.

  An object of the present invention is to reduce fluctuations in tension of a knitting yarn without reducing knitting efficiency. As a result, the knitting yarn can be efficiently knitted while preventing the knitting yarn from being cut or the size of the stitches from being irregular.

The flat knitting machine provided with the moving yarn guide of the present invention,
A needle bed, a carriage that reciprocates on the needle bed, a yarn feeder that moves with the carriage and supplies knitting yarn to the needles on the needle bed, and moves on the needle bed independently of the carriage, and knitting from the yarn source to the yarn feeder In a flat knitting machine comprising a moving yarn guide for supplying yarn, and storing the knitting yarn between the yarn feeder and the yarn source by the moving yarn guide,
The yarn supply path from the yarn source to the yarn feeder is configured so that the knitting yarn is supplied to the yarn feeder from one of the longitudinal directions of the needle bed via the moving yarn guide preceding the yarn feeder,
When knitting from one side to the other side, in knitting, which is an entry section of the knitting width, for example, the moving yarn guide stops or moves to the yarn feeder side, so that the yarn source is moved through the moving yarn guide. Push knitting to reduce the length of knitting yarn stored up to the yarn feeder,
Between knitting and knitting, which is the exit section of the knitting width, for example, the moving yarn guide moves in the same direction as the yarn feeder, so that the knitting yarn accumulated from the yarn source to the yarn feeder via the moving yarn guide Start pulling knitting with increasing length, continue pulling knitting until the end of the creation,
After knitting to the set-up, the yarn feeder and the moving yarn guide are reversed, and when knitting from the other side to the one side, the moving yarn guide moves in the same direction as the yarn feeder, for example, during knitting. By pushing knitting,
The moving yarn guide is separated from the yarn feeder between the knitting and knitting, and continues to pull knitting until the end of knitting, and the moving yarn guide stays between knitting and knitting,
A controller for controlling the position of the moving yarn guide so as to repeat the cycle is provided.

  Incorporation and set-up are, for example, sections of about 10 needles, and generally sections of about 5 to 20 needles. If the knitting direction is reversed, the transfer and set-up are reversed. At least one yarn feeder is usually provided, and a plurality of moving yarn guides are provided for each yarn feeder, for example. The rail on which the moving yarn guide moves may be the same rail as the yarn feeder or a different rail. In the case of another rail, the moving yarn guide can pass the yarn feeder. In this specification, push knitting refers to knitting in which the length of knitting yarn accumulated from a yarn source such as a positive yarn feeder to a yarn feeder through a moving yarn guide is reduced. Pull knitting refers to knitting in which the length of the knitting yarn stored from the yarn source to the yarn feeder through the moving yarn guide increases.

  In this invention, the knitting is pushed and knitted, and the outlet is pulled and knitted. Therefore, when the knitting is knitted away from the yarn source, it is possible to reduce the stitch size and prevent excessive tension from being applied to the knitting yarn. Further, when the knitting is knitted in the direction approaching the yarn source, it is possible to prevent the stitch size from increasing and the tension of the knitting yarn from becoming excessively small. Since the yarn feeder is stopped and only the moving yarn guide does not move, knitting can be performed efficiently. For these reasons, it is possible to reduce knitting yarn tension fluctuations and prevent the knitting yarn from being cut or the stitch sizes from becoming uneven without reducing the knitting efficiency. Therefore, even a weak knitting yarn such as a high-grade yarn can be stably knitted, a normal knitting yarn can be knitted at a higher speed, and when knitting with a metal yarn, the wear of the needle can be reduced.

Preferably, an active yarn feeding device is provided between the yarn source and the moving yarn guide to feed a required amount of knitting yarn to the moving yarn guide side by a motor-driven roller.
The controller is configured to temporarily increase the feed amount of the knitting yarn from the positive yarn feed device when changing from push knitting to pull knitting between the knitting and the knitting. When the yarn feeder and the moving yarn guide start moving in the same direction, and when the moving yarn guide separates from the yarn feeder, the knitting changes to pull knitting or push knitting. In order to prevent the knitting yarn from being cut off due to tension fluctuations accompanying this, the amount of knitting yarn fed from the active yarn feeding device is temporarily increased.

  Preferably, the controller moves the yarn feeder and the moving yarn guide as a unit while moving in the same direction, and causes the moving yarn guide to run before the yarn feeder and the moving yarn guide are united. It is configured. If it does in this way, the impact at the time of uniting a yarn feeder and a moving thread guide can be eased. Therefore, the vibration of the yarn feeder and the vibration of the moving yarn guide can be reduced, and fluctuations in yarn tension can be reduced.

  Preferably, when the knitting is knitted from the one side, the controller is configured to move the moving yarn guide remaining between the knitting and the knitting to the yarn feeder side. As a result, the tension applied to the knitting yarn can be made particularly low during knitting, and the knitted fabric can be knitted without cutting the high-speed weak knitting yarn without, for example, an active yarn feeding device.

  Preferably, the controller is configured to disperse the position where the moving yarn guide stays between knitting and knitting when knitting from the other side. If the moving yarn guide stays repeatedly at the same position, stripes may occur in the wale direction. Therefore, the positions where the moving yarn guide stays are dispersed so as not to cause stripes.

Front view of main part of flat knitting machine of embodiment The figure which shows operation | movement of the moving thread | yarn guide in an Example. The figure which shows operation | movement of the moving yarn guide at the time of supplying a yarn feeder from both sides in an Example. The figure which shows arrangement | positioning of the moving thread | yarn guide at the time of using several yarn feeders along a course direction

  In the following, an optimum embodiment for carrying out the invention will be shown.

  1 to 4 show an embodiment. FIG. 1 shows a flat knitting machine 2, 4 is a needle bed, which is provided with at least a pair of front and back needle beds 4, and in addition to this, two front and rear needle beds may be added above the needle bed 4. In addition to the needle bed 4, a transfer jack bed or the like may be added. A plurality of yarn path rails 6 are provided above the needle bed 4 along the longitudinal direction of the flat knitting machine 2, and the guide 10 of the yarn feeder 8 extends along the yarn path rail 6 in the longitudinal direction of the needle bed 4. Move to (course direction). A carriage (not shown) is provided to reciprocate on the needle bed 4 to operate the needles of the needle bed 4 and to carry a desired yarn feeder 8 in a desired section by an entraining pin (not shown). A plurality of yarn feeders 8 are provided along the yarn path rail 6, and the carriage entrains the yarn feeder 8 at a desired position and entrains at the desired position so that the desired yarn feeder 8 is entrained in a desired section. Can be canceled. A self-propelled yarn feeder may be used instead of the carriage.

  For each yarn path rail 6, for example, an auxiliary rail 12 is provided below the yarn path rail 6 along the course direction, and the moving yarn guide 14 travels. The auxiliary rail 12 may be provided above the yarn path rail 6, or the auxiliary rail 12 may not be provided and the moving yarn guide 14 may travel on the yarn path rail 6. The moving yarn guide 14 is fixed to, for example, an endless belt 16, and the motor 18 drives the belt 16 to move the entire width of the needle bed 4 along the course direction. However, a traveling motor may be built in the moving yarn guide 14 to be self-propelled, or another carriage may be added for entrainment of the moving yarn guide 14.

  The yarn feeder 8 includes, for example, three rollers 22 to 24, and an eyelet may be used instead of the rollers 22 to 24. However, the roller has a smaller resistance to the yarn than the eyelet, and is preferable. The moving yarn guide 14 includes a pair of left and right rollers 25 and 26, for example, but may be a single roller. Then, the knitting yarn 28 is supplied through the rollers 22 to 26 and the rollers 22 and 25 in FIG. 1, and the stitches are formed by the needles of the needle bed 4.

  Reference numerals 30 and 31 denote rollers, and reference numeral 32 denotes a torque controller. The torque generator 34 controls the torque applied to the arm 36. Then, the knitting yarn 28 is passed through an eyelet or the like of the arm 36, and a controller 52 (to be described later) detects a variation in tension from the knitting data in advance and controls the torque generator 34. Reference numeral 40 denotes an active yarn feeding device, which drives a yarn feeding roller 44 by a servo motor 42 to feed a required amount of the knitting yarn 28 between the rollers 44 and 46, and returns the knitting yarn 28 to the upstream side as necessary. It is important to drive the yarn feeding roller 44 by a motor such as a servo motor 42 and supply a required amount of the knitting yarn 28 to the moving yarn guide 14 side. The torque controller 32 is simply used as an elastically biased buffer arm or the like. It may be replaced. Reference numeral 48 denotes a roller, and reference numeral 50 denotes a yarn source such as a cone. The knitting yarn 28 is supplied from one end of the needle bed 4.

  The controller 52 of the flat knitting machine 4 interprets the knitting data, moves the carriage, entrains and releases the yarn feeder 8, moves the moving yarn guide 14, controls the active yarn feeding device 40, controls the torque controller 32, etc. Generate data. In addition, generation | occurrence | production of data may be made unnecessary by including these data in organization data.

  FIG. 2 shows the locus of the yarn feeder 8 and the locus of the moving yarn guide 14 in the embodiment. For simplicity, the yarn feeder 8 is shown moving at a constant speed. The vertical direction in FIG. 2 represents time, the one-dot chain line represents the locus of the yarn feeder 8, the solid line represents the locus of the moving yarn guide 14 in the embodiment, and the broken line represents the locus of the moving yarn guide 14 in the modification. The right side of FIG. 2 is the side that supplies the knitting yarn 28 from the yarn source, which corresponds to one of the claims, and the left side is the other side. The right end of the knitting width may be referred to as one end, and the left end may be referred to as the other end.

  “In” indicates knitting, “Out” indicates knitting, W is the knitting width, and the knitting yarns of the yarn feeder 8 are knitted by focusing on the individual yarn feeders 8 rather than the overall width of the knitted fabric. It means width. At the left end of FIG. 2, the yarn feeder 8 and the moving yarn guide 14 are reversed, the knitting is performed immediately before the reversal, and the knitting is performed immediately after the reversal. “m (union)” indicates a position where the moving yarn guide 14 starts to move integrally with the yarn feeder 8, and the union moves integrally at a constant speed. In addition, even if it is not integrated, if it moves in the same direction at a constant speed, the combined effect and action are the same. Further, instead of merging, the moving yarn guide 14 may only move in the same direction as the yarn feeder 8 at a constant speed or a small speed difference, for example. “s (separation)” represents a position where the moving yarn guide 14 is separated from the yarn feeder 8. When the yarn feeder 8 moves to the right (one side) in FIG. 2, the moving yarn guide 14 stops, for example, at the center of the knitting width W (between knitting and knitting) and waits, but continues to move at a slow speed. You may wait. The standby range is indicated by “R”. The left side of FIG. 2 shows the feed speed of the knitting yarn 28 from the positive yarn feed device 40, and the feed speed increases with +.

  When the yarn feeder 8 moves toward the moving yarn guide 14, knitting is performed while consuming the knitting yarn 28 stored between the yarn feeder 8 and the moving yarn guide 14. The knitting in which the length of the knitting yarn from the torque controller 32 to the yarn feeder through the moving yarn guide 14 is referred to as “push knitting”. The yarn feeder 8 and the moving yarn guide 14 are integrally moved to the torque controller 32 side (the side to which the knitting yarn 28 is supplied on the right side in FIG. 2), and the knitting stored between the torque controller 32 and the moving yarn guide 14 is stored. Knitting while reducing the length of the yarn is also called "push knitting". In push knitting, since the knitting is performed while consuming the length of the stored knitting yarn, the yarn feeding speed from the torque controller 32 is low, the tension of the knitting yarn 28 is low, and the stitches tend to be large in size. is there.

  When the yarn feeder 8 moves together with the moving yarn guide 14 to the left side in FIG. 2 (side away from the torque controller 32), the length of the knitting yarn between the torque controller 32 and the yarn feeder 8 increases. The knitting in which the length of the knitting yarn from the torque controller 32 through the moving yarn guide 14 to the yarn feeder increases is called “pulling knitting”. If the yarn feeder 8 moves to the right side in FIG. 2 while leaving the moving yarn guide 14 in the waiting area R, the length of the knitting yarn stored between the yarn feeder 8 and the yarn source 50 increases. Called “Knitting”. In the pull knitting, the knitting yarn is knitted while increasing the accumulated length of the knitting yarn. Therefore, the yarn feeding speed from the torque controller 32 is high and the tension of the knitting yarn 28 tends to be high. In knitting, the stitch size tends to be coarse, so it is preferable to finish the pull knitting.

  For these reasons, the flat knitting machine 2 of the embodiment realizes a knitting method in which yarn breakage does not occur and the sizes of stitches are less likely to be uneven even when knitted at a high speed with a weak knitting yarn. The condition that the knitting efficiency is not lowered is also achieved.

  When the yarn guide 14 follows the trajectory of the embodiment shown by the solid line in FIG. 2, the knitting from the knitting to the uniting at the upper right end in FIG. 2 is pushed knitting, which reduces the stitch size and makes the knitting yarn easy to break. To prevent becoming. In addition, the yarn feeding speed from the active yarn feeding device 40 is increased during knitting, and the torque controller 32 also supplementarily lowers the tension applied to the knitting yarn.

  When knitting, the controller may be configured to move the moving yarn guide 14 remaining between the knitting and the knitting to the yarn feeder 8 side. As a result, the knitting yarn is supplied to the yarn feeder 8, and the increase in tension during knitting can be reduced. At this time, the moving yarn guide 14 approaches the yarn feeder 8 and decreases the length of the stored knitting yarn, so that the operation is similar to that of the active yarn feeding device.

  In the united m, in order to smoothly unite the moving yarn guide 14 with the yarn feeder 8, the traveling of the moving yarn guide 14 is started before the uniting, and both move integrally at a constant speed from the united position. The moving yarn guide 14 may be moved in the same direction as the yarn feeder 8 without being combined. Since the knitting changes from pushing to pulling due to the coalescence, the yarn feeding speed of the active yarn feeder is temporarily increased immediately before and after the coalescence. At this time, the torque controller 32 may also temporarily reduce the tension of the knitting yarn. If the coalescing position is constant, streaks or patterns may be generated in the waling direction of the knitted fabric. Therefore, the coalescing position is dispersed in the standby region R, and for example, a predetermined number of needles (for example, needles) for each knitting course. Shift the coalescing position by 10).

  The knitting from the coalescence to the end of the set-up is a pull knitting, and the yarn feeding speed from the active yarn feeding device 40 is increased as compared with the pushing knitting. Since the stitch size tends to be large due to the knitting at the left end of FIG. 2, immediately before the yarn feeder 8 and the moving yarn guide 14 are reversed, the yarn feeding speed from the active yarn feeding device 40 is reduced, and the torque controller is used as an auxiliary. The tension applied to the knitting yarn is increased, or the speed of the moving yarn guide 14 is increased to increase the tension of the knitting yarn. Then, when the yarn feeder 8 and the moving yarn guide 14 are reversed, the yarn feeding speed from the active yarn feeding device 40 once becomes zero, and the yarn feeding speed from the active yarn feeding device 40 is temporarily increased by rightward insertion.

  When the yarn feeder 8 and the moving yarn guide 14 are reversed without being stationary at the left end (the other end) in FIG. Even when the other end is knitted, the yarn feeding speed is temporarily increased from the positive yarn feeder 40. The torque controller 32 also temporarily reduces the tension applied to the knitting yarn. From knitting to separation, push knitting is used, and the yarn feeding speed from the active yarn feeding device 40 is reduced.

  In separation s, the moving yarn guide 14 is separated from the yarn feeder 8 and stopped in the standby region R, so that the speed of the moving yarn guide 14 is smoothly reduced. In addition, if it stops suddenly here, tension | tensile_strength fluctuation | variation will become large. The yarn feeding speed of the active yarn feeding device 40 is temporarily increased immediately before and after the separation. When separated, the knitting is changed to the pull knitting, so that the yarn feeding speed from the positive yarn feeding device 40 is increased as compared with the pushing knitting. If the separation position is constant, streaks or patterns may be generated in the waling direction of the knitted fabric. Therefore, the separation position is dispersed in the standby region R, for example, a predetermined number of needles (for example, needles) for each knitting course. Shift the separation position by 10).

  Since the stitch size tends to increase during set-up, the yarn feeding speed from the positive yarn feeding device 40 is decreased immediately before reaching the right end (one end) in FIG. The yarn feeder 8 is reversed at the right end in FIG. 2 without being stationary, and returns to the upper locus in FIG. The moving yarn guide 14 may be separated from the yarn feeder 8 in the standby region R and wait, and does not need to stop and wait.

  The broken line in FIG. 2 shows the trajectory of the moving yarn guide 14 in the modified example. The difference from the example is that the left line does not stop and wait for the yarn feeder 8, but moves forward at a lower speed than the yarn feeder 8. The moving yarn guide 14 and the yarn feeder 8 are united immediately before the left end of the knitting width. In the left line, knitting is an intermediate knitting between push knitting and pulling knitting, knitting is pulling, and the other knitting is intermediate between push knitting and pulling knitting. Even on the right side, the moving yarn guide 14 moves at a lower speed than the yarn feeder 8, performs intermediate knitting between push knitting and pulling knitting until just before knitting, and the moving yarn guide 14 stops just before knitting. Then, pull the organization. In the modified example, the change in the yarn supply condition is reduced, and the ratio of relying on the active yarn feeder 40 is reduced. The other points are the same as in the embodiment.

  FIG. 3 shows an example in which the knitting yarns 28 and 29 are fed from both the left and right sides. The knitting yarn 29 fed from the left side of the flat knitting machine 2 is fed to the yarn feeder 8 via the moving yarn guide 15. The knitting yarn 28 fed from the right side is fed to the yarn feeder 8 via the moving yarn guide 14. The double yarn feeding shown in FIG. 3 is obtained by adding the yarn feeding obtained by inverting the left and right to the yarn feeding in the embodiment shown in FIG.

  In FIGS. 2 and 3, yarns are fed from a single yarn feeder 8 for the entire knitting width, but the yarn feeder may be switched depending on the position within the knitting width in intarsia knitting or the like. FIG. 4 shows such an example. In the area 62 on the right side of the knitted fabric 60, the knitting yarn 28 is fed from the yarn feeder 8 via the moving yarn guide 14, and in the left area 64, the moving yarn guide 14 ′. The knitting yarn 28 'is fed from the yarn feeder 8' through the yarn. In such a case, knitting / knitting and knitting width are considered in units of areas 62 and 64, in other words, based on the yarn feeding range of the yarn feeders 8 and 8 '. That is, the same knitting as in FIGS. 2 and 3 is performed with the area 62 as the knitting width of the yarn feeder 8 and the area 64 as the knitting width of the yarn feeder 8 ′.

2 Flat knitting machine 4 Needle bed 6 Yarn path rail 8 Yarn feeder 10 Guide 12 Auxiliary rails 14 and 15 Moving yarn guide 16 Belt 18 Motor 22 to 26 Roller 28 and 29 Knitting yarn 30 and 31 Roller 32 Torque controller 34 Torque generator 36 Arm 40 Active yarn feeding device 42 Servo motor 44, 46 Roller 48 Roller 50 Thread source 52 Controller
60 Knitted fabric 62, 64 area

W Knitting width R Standby area

Claims (5)

A needle bed, a carriage that reciprocates on the needle bed, a yarn feeder that moves with the carriage and supplies knitting yarn to the needles on the needle bed, and moves on the needle bed independently of the carriage, and knitting from the yarn source to the yarn feeder In a flat knitting machine comprising a moving yarn guide for supplying yarn, and storing the knitting yarn between the yarn feeder and the yarn source by the moving yarn guide,
The yarn supply path from the yarn source to the yarn feeder is configured so that the knitting yarn is supplied to the yarn feeder from one of the longitudinal directions of the needle bed via the moving yarn guide preceding the yarn feeder,
When knitting from one side to the other side, in knitting, which is the entry section of the knitting width, the length of the knitting yarn accumulated from the yarn source to the yarn feeder through the moving yarn guide is reduced. Organize,
Between the knitting and the knitting, which is the exit section of the knitting width, pull knitting is started in which the length of the knitting yarn accumulated from the yarn source to the yarn feeder through the moving yarn guide is increased. Continue to pull to the end,
After knitting until knitting, the yarn feeder and the moving yarn guide are reversed, and when knitting from the other side toward the one side, push knitting is performed in knitting,
The moving yarn guide is separated from the yarn feeder between the knitting and knitting, and continues to pull knitting until the end of knitting, and the moving yarn guide stays between knitting and knitting,
A flat knitting machine comprising a moving yarn guide, characterized by comprising a controller for controlling the position of the moving yarn guide so as to repeat the cycle. Between the yarn source and the moving yarn guide, there is provided an active yarn feeding device that feeds a required amount of knitting yarn to the moving yarn guide side by a motor-driven roller,
The controller is configured to temporarily increase the feed amount of the knitting yarn from the positive yarn feeding device when changing from push knitting to pull knitting between the knitting and the knitting. A flat knitting machine comprising the moving yarn guide according to claim 1.   The controller is configured so that the yarn feeder and the moving yarn guide move together while moving in the same direction, and the moving yarn guide is run before the yarn feeder and moving yarn guide are united. A flat knitting machine comprising the moving yarn guide according to claim 1 or 2.   The controller is configured to move a moving yarn guide staying between knitting and knitting to the yarn feeder side when knitting knitting from the one side. A flat knitting machine including any one of the moving yarn guides 1 to 3.   5. The controller according to claim 1, wherein, when knitting from the other side, the controller is configured to disperse a position where the moving yarn guide stays between knitting and knitting. Flat knitting machine with a moving yarn guide.

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