CN110468493B - Tension measuring device of loom and tension measuring method thereof - Google Patents
Tension measuring device of loom and tension measuring method thereof Download PDFInfo
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- CN110468493B CN110468493B CN201910389212.6A CN201910389212A CN110468493B CN 110468493 B CN110468493 B CN 110468493B CN 201910389212 A CN201910389212 A CN 201910389212A CN 110468493 B CN110468493 B CN 110468493B
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- yarn
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B7/00—Flat-bed knitting machines with independently-movable needles
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
- D04B15/38—Devices for supplying, feeding, or guiding threads to needles
- D04B15/44—Tensioning devices for individual threads
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
- D04B35/10—Indicating, warning, or safety devices, e.g. stop motions
- D04B35/14—Indicating, warning, or safety devices, e.g. stop motions responsive to thread breakage
- D04B35/16—Indicating, warning, or safety devices, e.g. stop motions responsive to thread breakage with detectors associated with a series of threads
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B37/00—Auxiliary apparatus or devices for use with knitting machines
- D04B37/02—Auxiliary apparatus or devices for use with knitting machines with weft knitting machines
Abstract
The invention provides a tension measuring device of a loom and a tension measuring method thereof, which can know the correct tension of a knitting yarn in a state of being capable of knitting at a position after passing through a yarn feeding port and prevent the defects of the knitting fabric caused by the abnormal tension of the knitting yarn. In a weft knitting machine which feeds a knitting yarn through a yarn feeding path (2) to a knitting needle in a state where tension is applied to the knitting yarn (20), after the knitting yarn (20) is drawn into a measuring path (24) different from the yarn feeding path to the knitting needle in a state where knitting can be performed by a knitting yarn drawing-in means (51) at a position after passing through a yarn feeding port (153), the tension of the knitting yarn (20) drawn into the measuring path (24) without performing knitting is measured by a measuring means (52), and the measured value of the tension of the knitting yarn (20) at the position after passing through the yarn feeding port (153) is displayed on a monitor (53).
Description
Technical Field
The present invention relates to a tension measuring device capable of accurately grasping the tension of a knitting yarn in a loom that feeds the knitting yarn through a yarn feeding path to a knitting needle while applying tension to the knitting yarn from a yarn reel.
Background
Conventionally, as a tension measuring device for such a loom, the following devices are known: the tension measuring device is provided in the middle of a yarn feeding path of a knitting yarn from a yarn drum to a knitting needle, and measures the tension of the knitting yarn fed in a state where the tension is applied to the yarn feeding path by a top spring device, a side tensioner device, or the like (see patent document 1).
In this tension measuring device, when knitting is performed using a knitting yarn fed through a yarn feeding path, the tension of the knitting yarn in the middle of the yarn feeding path is measured before the knitting yarn passes through a yarn feeding port of the yarn feeding path.
[ Prior Art document ]
[ patent document ]
[ patent document 1 ] Japanese patent No. 2951068
Disclosure of Invention
However, as the tension of the knitting yarn at the time of knitting, considering the influence on the knitted fabric to be knitted, it is preferable to measure a tension measurement value at a position as close as possible to the knitting needle, that is, a position after passing through the yarn feeder.
In the above-described conventional tension measuring device, since the tension of the knitting yarn is measured at a position before the yarn feeder port, it cannot be denied that a difference is generated between the tension of the knitting yarn at a position after the yarn feeder port and the tension of the knitting yarn at a position after the yarn feeder port, and the tension of the knitting yarn cannot be accurately grasped.
Further, since the knitting yarn is fed to the knitting needle at a high speed just before the tension measurement, the knitting is continued by inertia even if there is an abnormality in the tension measurement value of the knitting yarn, and there is a possibility that a defect may occur in the knitted fabric during the knitting.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a tension measuring device for a loom and a tension measuring method thereof, which can detect an accurate tension of a knitting yarn knitted at a position after passing through a yarn feeder port by stopping the yarn feeder port and drawing the knitting yarn into a measuring path different from a yarn feeding path to a knitting needle to measure the tension in a state where the knitting can be performed at the position after passing through the yarn feeder port, and can prevent a defect of a knitted fabric due to an abnormality in a measured value of the tension of the knitting yarn.
In order to achieve the above object, the present invention is premised on a loom in which a knitting yarn having passed through a yarn feeding path to a knitting needle is guided to the knitting needle by a yarn feeding port of the yarn feeding path while applying tension to the knitting yarn from a yarn drum, and the knitting yarn is supplied to the knitting needle. A tension measuring device body is provided in the vicinity of the yarn feeder, and the tension measuring device body draws in the knitting yarn at a position after passing through the yarn feeder with respect to a measuring path different from a yarn feeding path to the knitting needle to measure the tension of the knitting yarn. The tension measuring apparatus main body includes: a knitting yarn drawing-in unit that draws in a knitting yarn to the measurement path in a state where the knitting yarn can be knitted, at a position after passing through the yarn feeder; a measuring unit provided between the yarn feeder and the knitting yarn drawing-in unit of the measurement path, for measuring a tension of the knitting yarn drawn in by the knitting yarn drawing-in unit to the measurement path without knitting; and a display unit that displays the measured value of the tension of the knitting yarn on the measurement path measured by the measurement unit. In this case, the state where knitting is possible means a state where knitting of the knitted fabric is possible in this state if the knitted fabric is guided to the knitting needle after passing through the yarn feeder.
Further, a tension applying means for applying tension to the knitting yarn is provided in the yarn feeding path. The display means may display the measured value of the tension of the knitting yarn on the measurement path so that the measured value of the tension can be compared with a target value of the tension of the knitting yarn passing through the yarn feeder as a target in advance and can be brought close to the target value of the tension by the adjustment of the tension applying means.
Further, the yarn feeding speed of the knitting yarn in the measurement path may be changed in accordance with a yarn feeding speed that varies at a position after passing through the yarn feeder by changing a feeding direction of the knitting yarn in the yarn feeding path.
The tension measuring device body may be detachably provided in the vicinity of a yarn feeder of the loom.
In order to achieve the above object, the present invention is premised on a loom in which a knitting yarn having passed through a yarn feeding path to a knitting needle is guided to the knitting needle by a yarn feeding port of the yarn feeding path while applying tension to the knitting yarn from a yarn drum and the knitting yarn is fed to the knitting needle as a tension measuring method of the loom. The knitting yarn is drawn in a position after passing through the yarn feeder port in a state where knitting can be performed with respect to a measurement path different from a yarn feeding path to the knitting needle. Then, the tension of the knitting yarn drawn into the measurement path without knitting is measured, and the measured value of the tension of the knitting yarn passing through the yarn feeder is displayed.
[ Effect of the invention ]
As described above, by introducing the knitting yarn into the measurement path in a state where the knitting yarn can be knitted at the position after passing through the yarn feeder and measuring the tension of the knitting yarn, the tension of the knitting yarn can be accurately grasped at the position after passing through the yarn feeder in a state where the knitting yarn can be knitted. In particular, even in the case of intarsia knitting in which a knitted fabric is knitted from a yarn drum through a plurality of yarn feeding paths having different lengths, the tension of the knitting yarn can be accurately grasped at a position after passing through the yarn feeding port for each yarn feeding path. Further, even in the same yarn feeding path, the tension of the knitting yarn that varies according to the knitting amount (yarn amount) of the knitted fabric can be accurately grasped.
Further, by stopping the yarn feeder at a position after passing through the yarn feeder and drawing the knitting yarn to a measurement path different from the yarn feeding path to the knitting needle to measure the tension, it is not necessary to knit the knitted fabric by the knitting needle while the tension of the knitting yarn is being measured, and it is possible to prevent a failure of the knitted fabric due to an abnormality in the tension measurement value of the knitting yarn by checking before knitting.
Further, by displaying the tension measurement value of the knitting yarn on the measurement path so as to be able to be compared with the target tension value of the knitting yarn which is a target in advance and to approach the target tension value by the adjustment of the tension applying means, the tension applying means can adjust the state of application of the tension to the knitting yarn, and the tension measurement value can accurately approach the target tension value.
Further, by changing the yarn feeding speed of the knitting yarn on the measurement path in accordance with the yarn feeding speed that varies due to the change in the feeding direction of the knitting yarn on the yarn feeding path at the position after passing through the yarn feeding port, the tension corresponding to the yarn feeding speed of the knitting yarn that varies on the yarn feeding path can be easily measured on the measurement path.
Further, the tension measuring device body is detachably provided in the vicinity of the yarn feeder of the loom, and can be provided in the vicinity of the yarn feeder of another loom, and the tension of the knitting yarn on the yarn feeding path of another loom can be accurately measured by using a single tension measuring device.
The yarn is drawn into a measurement path different from a yarn feeding path to the knitting needle in a state where the yarn can be knitted at a position after passing through the yarn feeding port, and a measured value of the tension of the yarn drawn into the measurement path without knitting is displayed. Thus, it is possible to provide a tension measuring method capable of accurately grasping the tension of a knitting yarn knitted at a position after passing through a yarn feeder and preventing a failure of a knitted fabric due to an abnormal tension of the knitting yarn on a yarn feeding path before knitting.
Drawings
Fig. 1 is a schematic configuration diagram of a flat knitting machine including a tension measuring device according to an embodiment of the present invention.
Fig. 2 is a schematic configuration diagram showing a yarn feeding path of a knitting yarn in the flat knitting machine of fig. 1.
Fig. 3 is a schematic configuration diagram of the tension measuring apparatus of fig. 2.
[ Mark Specification ]
Flat-bed machine (weaving machine)
153 yarn feeder
17 yarn reel
2 yarn feeding path
20 knitting yarn
24 measuring path
3 Top spring device (tension applying unit)
4 side tension device (tension applying unit)
50 tension measuring device body
51 knitting yarn draw-in unit
52 measurement unit
53 monitor (display unit)
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Fig. 1 is a schematic configuration diagram of a yarn feeding path of a knitting yarn including a tension measuring device according to an embodiment of the present invention, and fig. 2 is a schematic configuration diagram of a yarn feeding path of a knitting yarn in the flat knitting machine shown in fig. 1.
In fig. 1 and 2, the flat knitting machine 1 includes front and rear needle beds 11 (only one is shown) facing each other in an inverted V shape across a needle bed gap 10. Further, the carriage 12 is disposed on the front and rear needle beds 11 so as to straddle the yarn path rail 14. The carriage 12 is reciprocated in the longitudinal direction (the left-right direction in fig. 1) of the needle bed 11 by a servo motor (not shown).
Specifically, a plurality of yarn path rails 14 (only 1 is shown in fig. 1) are provided above the needle bed gap 10 so as to extend in the longitudinal direction of the needle bed 11. On the yarn path rail 14, yarn bobbins 15 and 16 for supplying the knitting yarn 20 are supported so as to be capable of running. Two running tracks for running the yarn bobbins 15 and 16 are formed on the yarn path rail 14. The yarn frames 15 and 16 include bases 151 and 161, yarn feed arms 152 and 162 extending downward from the bases 151 and 161, and yarn feed ports 153 and 163 provided at lower ends of the yarn feed arms 152 and 162 and guiding the knitting yarn 20 to knitting needles (not shown). A plurality of knitting needles are arranged in a row in the longitudinal direction of each needle bed 11, and knitting operation can be selectively performed by a system such as a needle selection mechanism and a cam mechanism mounted on each carriage 12.
The carriage 12 causes the yarn bobbins 15 and 16 to be interlocked by engaging the yarn bobbin interlocking pin with the concave portions of the yarn bobbins 15 and 16. Further, a yarn drum 17 is provided on a yarn stand 18 of the flat knitting machine 1. The knitting yarn 20 from each yarn drum 17 is supplied to the yarn feeders 153 and 163 of the respective bobbins 15 and 16 through the separate yarn feeding paths 2.
Knitting of the knitted fabric 22 is performed by repeating the following steps: the hook at the tip of the knitting needle is advanced toward the needle bed gap 10, and the knitting yarn 20 fed from the yarn feeder ports 153 and 163 is drawn into each needle bed 11, thereby knocking over the old loop. The carriage 12 moves one or more yarn bobbins 15, 16 together to knit the knitted fabric 22. Knitting of the knitted fabric 22 is performed under control based on previously created knitting data, and the knitted fabric 22 is pulled down below the needle bed gap 10 in accordance with the knitting. The operation of the carriage 12 and the knitting needles is also automatically performed based on the knitting data, and the moving stroke of the carriage 12 is also optimized based on the knitting data and the like.
The bobbins 15 and 16 stand by near the knitting end 221 which is the outer side of the knitting width of the knitted fabric 22. The moving direction of the carriage 12 is reversed by switching the rotation direction of a servo motor (not shown) in the vicinity of the outside of the knitting width of the knitted fabric 22.
The yarn feeding path 2 is provided with a plurality of top spring devices 3 as tension applying means provided at the upper end of the weft knitting machine 1. The top spring device 3 includes a tension disc 31, a support arm 32 protruding forward from a base end portion supporting the tension disc 31, and a yarn guide 33 provided at a front end of the support arm 32. The knitting yarn 20 supplied upward from the yarn drum 17 is guided downward from the tension disc 31 of the top spring device 3 by the yarn guide 33 at the distal end of the support arm 32. At this time, tension is applied to the knitting yarn 20 passing through the tension disc 31, and the load on the tension disc 31 is adjusted by the adjustment knob 34 provided on the tension disc 31, thereby changing the application of tension to the knitting yarn 20.
Further, the yarn feeding path 2 is provided with a plurality of side tensioners 4 as tension applying means provided on both right and left sides of the yarn standing stand 18. The side tensioner 4 includes support portions 41 supported swingably at both left and right ends of the yarn stand 18. The side tensioner 4 includes a side tensioner arm 42 having an upper end attached to the support portion 41, and a yarn guide 43 provided at a tip (lower end) of the side tensioner arm 42. The support portion 41 can adjust the swing load of the side tension arm 42 with respect to the yarn stand 18. The knitting yarn 20 guided downward from the top spring device 3 is guided inward in the left-right direction by the yarn guide 43 at the distal end of the side tension arm 42. At this time, tension is applied to the knitting yarn 20 by the swinging load of the side tension arm 42 in the support portion 41 and the bending of the side tension arm 42, and the swinging load of the side tension arm 42 is adjusted by an adjustment dial (not shown) provided in the support portion 41, thereby changing the application of tension to the knitting yarn 20.
Further, a delivery roller 44 for delivering the knitting yarn 20 by being wound around one turn is provided in the yarn feeding path 2 between the top spring device 3 and the side tension device 4. The feed roller 44 applies a driving force to the knitting yarn 20 to feed the yarn from the yarn drum 17 to the side tension device 4 via the top spring device 3, and smoothly feeds the knitting yarn 20 to the bobbins 15, 16 by reducing the resistance, and the bobbins 15, 16 slide in the left-right direction on the yarn path rail 14 in conjunction with the carriage 12. When the bobbins 15 and 16 slide in the left-right direction in conjunction with the carriage 12, the knitting yarn 20 from the side stretching device 4 is switched between a drawing direction in which the knitting yarn is drawn out from the yarn feeders 153 and 163 in the guiding direction and a pressing direction in which the knitting yarn is drawn out in a direction opposite to the guiding direction.
Fig. 3 is a schematic configuration diagram of the tension measuring apparatus shown in fig. 2. In fig. 3, a tension measuring device main body 50 of the tension measuring device 5 is provided in the vicinity of the yarn feeder 153 of the yarn stand 15, and the tension measuring device main body 50 draws the knitting yarn 20 into a measuring path 24 different from the yarn feeder path 2 to the knitting needle in a state where the yarn feeder 153 is stopped at a position after passing through the yarn feeder 153 to measure the tension. The tension measuring device main body 50 includes a housing 59 having a frame shape, and a magnet (not shown) is provided on a lower surface of the housing 59 and is detachably attached to the metal support base 19 of the weft knitting machine 1. This makes it possible to provide the tension measuring device in the vicinity of the yarn feeder of the other flat knitting machine, and to accurately measure the tension of the knitting yarn in the yarn feeding path of the other flat knitting machine using the single tension measuring device body 50. In the present embodiment, the housing 59 of the tension measuring device main body 50 is detachably attached to the support base 19 of the weft knitting machine 1, but the tension measuring device main body may be integrally provided in the support base of the weft knitting machine in a non-detachable state.
The tension measuring device body 50 includes a knitting yarn drawing-in unit 51, and the knitting yarn drawing-in unit 51 draws in the knitting yarn 20 on the yarn feeding path 2 at the time of feeding the knitting yarn to the knitting needle in a state where knitting can be performed to the measuring path 24 at a position after passing through the yarn feeding port 153. The knitting yarn drawing unit 51 includes: a knitting yarn drawing-in motor 511; a knitting yarn take-in pulley 513 rotationally and integrally coupled to the output shaft 512 of the knitting yarn take-in motor 511; and a driven pulley 514 which rotates together with the yarn take-in pulley 513 with the yarn 20 interposed therebetween. In this case, the yarn feeding speed of the knitting yarn 20 on the measurement path 24 by the knitting yarn drawing-in unit 51 is set to be the same as the yarn feeding speed of the knitting yarn 20 on the yarn feeding path 2 guided to the knitting needle at a position after passing through the yarn feeding port 153 by the yarn creel 15 interlocked with the carriage 12.
The tension measuring device body 50 further includes a measuring unit 52, and the measuring unit 52 is provided between the yarn feeder 153 and the knitting yarn drawing-in unit 51 of the measuring path 24. The measurement unit 52 includes: 2 guide rollers 521 and 522 for guiding the knitting yarn 20 fed to the measurement path 24; a tension detection roller 523 provided between the two guide rollers 521 and 522; a load sensor 524 supporting the tension detecting roller 523. The measuring unit 52 measures the tension of the knitting yarn 20 drawn into the measurement path 24 by the knitting yarn drawing unit 51 via the tension detecting roller 523 by the load cell 524.
The tension measuring apparatus main body 50 is provided with a monitor 53 as a display means for displaying the tension measured by the load cell 524. The monitor 53 displays a measured value of the tension of the knitting yarn 20 on the measurement path 24, which is a measured value of the tension of the knitting yarn 20 at a position after passing through the yarn feeder port 153. The tension measurement value displayed on the monitor 53 is displayed so as to be able to be compared with a target tension value of the knitting yarn 20 to the knitting needle on the yarn feeding path 2, which is a predetermined target, and is used so that the tension measurement value approaches the target tension value of the knitting yarn 20 on the yarn feeding path 2 at a position after passing through the yarn feeding port 153 by the adjustment of the top spring device 3 and the side tension device 4. In this case, the target tension value of the knitting yarn 20 on the yarn feeding path 2 at the position after passing through the yarn feeder 153 is set in advance according to the type of the flat knitting machine, and does not need to be an ideal target tension value as long as the target tension value can be knitted but cannot be knitted.
The yarn feeding speed of the knitting yarn 20 on the measurement path 24 is changed in accordance with a change in the guiding direction of the knitting yarn 20 to the knitting needle on the yarn feeding path 2 at a position after passing through the yarn feeding port 153, that is, a yarn feeding speed that varies when the knitting yarn 20 from the yarn feeding port 153 of the yarn creel 15 reversed by switching of the folding back in the traveling direction of the carriage 12 is switched between the pressing direction and the drawing direction. The yarn feeding speed that varies when the pressing direction and the drawing direction of the knitting yarn 20 are switched is set in advance in accordance with the pitch of the stitch row direction of the stitch, the stitch length of the knitted stitch, the speed of the knitted fabric 22, and the gauge of the flat knitting machine 1. In this case, the yarn feeding speed in the pressing direction and the drawing direction of the knitting yarn 20 is set in advance for each type of the flat knitting machine 1.
For example, in the case of a plain stitch, the yarn feeding speed (m/s) in the pressing direction of the knitting yarn 20 can be calculated based on ((stitch length of stitch-pitch of stitch)/pitch of stitch) × the speed at which the knitted fabric 22 is knitted. Specifically, the yarn feeding speed (m/s) in the pressing direction of the knitting yarn 20 is (6.0-1.814)/(1.814 × 1.0) ≈ 2.3m/s depending on the pitch 1.814 in the course direction of the stitch, the stitch length 6.0 of the knitted stitch, the speed 1.0 of the knitted fabric 22, and the number 14G of the flatbed knitting machine 1.
On the other hand, the yarn feeding speed (m/s) in the drawing direction of the knitting yarn 20 can also be calculated based on ((the stitch length of the stitch + the pitch of the stitch)/the pitch of the stitch) × the speed at which the knitted fabric 22 is knitted. Specifically, the yarn feeding speed (m/s) in the drawing direction of the knitting yarn 20 is (6.0+1.814)/(1.814 × 1.0) ≈ 4.3m/s depending on the pitch 1.814 in the course direction of the stitch, the stitch length 6.0 of the knitted stitch, the speed 1.0 of the knitted fabric 22, and the number 14G of the flatbed knitting machine 1.
In addition, the rotation speed of the knitting yarn drawing motor 511 can be obtained based on the yarn feeding speed in the pressing direction or the drawing direction of the knitting yarn 20 based on the correlation between the rotation speeds. For example, according to the correlation between the rotation speeds, the rotation speed of the yarn drawing-in pulley 513 is about 1400rpm when the yarn feeding speed in the pressing direction of the knitting yarn 20 is 2.3m/s, and the rotation speed of the yarn drawing-in pulley 513 is about 2550rpm when the yarn feeding speed in the drawing direction of the knitting yarn 20 is 4.3 m/s.
Next, an example of a measuring method for measuring the tension of the knitting yarn 20 at a position after passing through the yarn feeder port 153 by using the tension measuring device main body 50 will be described.
First, the knitting yarn 20 at a position after passing through the yarn feeder 153 of each yarn stand 15 is drawn in a state where knitting can be performed from the yarn drum 17 through the top spring device 3 and the side tension device 4 with respect to the measurement path 24 different from the yarn feeding path 2 to the knitting needle.
Subsequently, the knitting yarn 20 drawn into the measurement path 24 without being knitted is sandwiched between the knitting yarn drawing pulley 513 and the driven pulley 514. Then, the yarn take-in motor 511 rotates the yarn take-in pulley 513 in a state where knitting can be performed on the yarn feed path 2 when guiding the yarn to the knitting needle, and rotates the driven pulley 514 in tandem to feed out the yarn 20 that is taken in without knitting to the measurement path 24.
At this time, when the yarn feeding speed that varies when the position after passing through the yarn feeder 153 is switched to the pressing direction and the drawing direction of the knitting yarn 20 in the yarn feeding path 2 is set, the yarn feeding speed in the measurement path 24 may be set based on a preset numerical value in accordance with the pitch in the course direction of the stitch, the stitch length of the knitted stitch, the speed of the knitted fabric 22, the machine number of the flat knitting machine 1, and the like. Specifically, the rotation speed of the yarn take-in pulley 513 may be set based on the correlation with the yarn feeding speed in the pressing direction or the drawing direction of the yarn 20. Accordingly, the yarn feeding speeds in the pressing direction and the drawing direction having different ratios can be easily reproduced by using a combination of the stitch length of the stitch and the knitting speed, and the tension corresponding to the yarn feeding speed varying in the yarn feeding path 2 can be easily measured in the measurement path 24.
Then, the tension of the knitting yarn 20 drawn into the measurement path 24 without knitting at the position after passing through the yarn feeder port 153 is measured by the load cell 524 of the measurement unit 52. This makes it possible to accurately grasp the tension of the knitting yarn 20 passing through the yarn feeder port 153 in a position comparable to the yarn feeder path 2 in a state where knitting is possible. In particular, even in the case of intarsia knitting in which the knitted fabric 22 is knitted through a plurality of yarn feeding paths 2 and 2 having different lengths from different yarn reels 17, the tension of the knitting yarn 20 passing through the yarn feeding port 153 can be accurately grasped for each yarn feeding path 2 and 2. Moreover, even in the same yarn feeding path 2, the tension of the knitting yarn 20 that varies according to the knitting amount of the knitted fabric 22 can be accurately grasped. Further, by stopping the yarn feeder 153 at a position after passing through the yarn feeder 153 and drawing the knitting yarn 20 into the measurement path 24 different from the yarn feeder path 2 to the knitting needle to measure the tension, it is not necessary to knit the knitted fabric 22 while the tension of the knitting yarn 20 is being measured, and it is possible to prevent a problem of the knitted fabric 22 due to an abnormality in the tension measurement value of the knitting yarn 20 by checking before knitting.
Then, the measured value of the tension of the knitting yarn 20 measured by the load cell 524 at the position after passing through the yarn feeder port 153 is displayed on the monitor 53. Therefore, the tension measured value displayed on the monitor 53 can be compared with the target tension value of the knitting yarn 20 on the yarn feeding path 2 at the position after passing through the yarn feeder port 153. Thus, the measured value of the tension of the knitting yarn 20 on the yarn feeding path 2 can be accurately brought close to the target value of the tension by adjusting the load of the tension dial 31 by the adjustment knob 34 of the top spring device 3 or adjusting the swinging load of the side tension arm 42 with respect to the yarn stand 18 by the support portion 41 of the side tension device 4.
The present invention is not limited to the above embodiment, and includes various other modifications. For example, in the above embodiment, the tension measurement value displayed on the monitor 53 and the tension target value on the yarn feeding path 2 at the position after passing through the yarn feeder 153 can be compared and used for adjusting the top spring device 3, the side tension device 4, and the like so that the tension measurement value approaches the tension target value. In this case, since the measured tension value displayed on the monitor is a measured tension value as close as possible to the state in which knitting is performed, it is not necessary to adjust the tension value of the knitting yarn close to the target tension value. According to this, the tension measurement value displayed on the monitor can grasp the difference between yarn feeding ports in the same loom, the difference between different looms, and the like, and the adjustment of the state of application of tension to the yarn path can be accurately handled based on the tension measurement value without depending on the feeling.
In the above embodiment, the yarn feeding path 2 is provided with the delivery roller 44 that applies the driving force to the knitting yarn 20, but a delivery device that applies the driving force to the knitting yarn and measures the yarn feeding amount of the knitting yarn may be provided in the yarn feeding path.
In the above embodiment, the case where the tension measuring device 5 is applied to the weft knitting machine 1 has been described, but the present invention is not limited thereto, and the tension measuring device may be applied to a knitting machine such as a warp knitting machine or a circular knitting machine.
In the above embodiment, the case where the top spring device 3 and the side tension device 4 are applied as the tension applying means has been described, but this is merely an example, and the tension applying means is not limited to this.
In the above embodiment, the tension measuring apparatus main body 50 is detachably mounted on the support base 19 of the weft knitting machine 1 by the magnet provided on the lower surface of the housing 59, but the tension measuring apparatus main body may be detachably mounted by providing a recess in the support base of the weft knitting machine and fitting the housing into the recess. It is needless to say that the tension measuring device body may be detachably attached to the support base of the weft knitting machine by a lock member or the like.
Claims (6)
1. A tension measuring device for a loom,
the loom guides a knitting yarn passing through a yarn feeding path to a knitting needle through a yarn feeding port of the yarn feeding path to feed the knitting yarn to the knitting needle while applying tension to the knitting yarn from a yarn reel,
a tension measuring device body is provided in the vicinity of the yarn feeder, the tension measuring device body measuring the tension of the knitting yarn by drawing the knitting yarn at a position after passing through the yarn feeder with respect to a measuring path different from a yarn feeding path to the knitting needle,
the tension measuring device body includes:
a knitting yarn drawing-in unit that draws in a knitting yarn to the measurement path in a state where the knitting yarn can be knitted, at a position after passing through the yarn feeder;
a measuring unit provided between the yarn feeder and the knitting yarn drawing-in unit of the measurement path, for measuring a tension of the knitting yarn drawn in by the knitting yarn drawing-in unit to the measurement path without knitting; and
and a display unit that displays the measured value of the tension of the knitting yarn on the measurement path measured by the measurement unit.
2. The tension measuring device for a loom according to claim 1,
a yarn feeding path is provided with a tension applying unit for applying tension to the knitting yarn,
the display means displays a measured value of the tension of the knitting yarn on the measurement path so that the measured value can be compared with a target value of the tension of the knitting yarn passing through the yarn feeder as a target in advance and can be brought close to the target value of the tension by the adjustment of the tension applying means.
3. The tension measuring device for a loom according to claim 1 or 2,
the yarn feeding speed of the knitting yarn on the measurement path is changed in accordance with a yarn feeding speed that varies by changing the feeding direction of the knitting yarn on the yarn feeding path at a position after passing through the yarn feeder.
4. The tension measuring device for a loom according to claim 1 or 2,
the tension measuring device body is detachably provided in the vicinity of a yarn feeder of the loom.
5. The tension measuring device for a loom according to claim 3,
the tension measuring device body is detachably provided in the vicinity of a yarn feeder of the loom.
6. A method for measuring the tension of a loom,
the loom guides a knitting yarn passing through a yarn feeding path to a knitting needle through a yarn feeding port of the yarn feeding path to feed the knitting yarn to the knitting needle while applying tension to the knitting yarn from a yarn reel,
after the knitting yarn is drawn in a state where knitting can be performed with respect to a measurement path different from a yarn feeding path to the knitting needle at a position after passing through the yarn feeding port, the tension of the knitting yarn drawn in without performing knitting in the measurement path is measured, and the measured value of the tension of the knitting yarn passing through the position after passing through the yarn feeding port is displayed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018092147A JP7048407B2 (en) | 2018-05-11 | 2018-05-11 | Knitting machine tension measuring device and its tension measuring method |
| JP2018-092147 | 2018-05-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110468493A CN110468493A (en) | 2019-11-19 |
| CN110468493B true CN110468493B (en) | 2021-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910389212.6A Active CN110468493B (en) | 2018-05-11 | 2019-05-10 | Tension measuring device of loom and tension measuring method thereof |
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| Country | Link |
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| EP (1) | EP3567148B1 (en) |
| JP (1) | JP7048407B2 (en) |
| KR (1) | KR102190613B1 (en) |
| CN (1) | CN110468493B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7438007B2 (en) | 2020-04-23 | 2024-02-26 | 株式会社島精機製作所 | Thread insertion device for flat knitting machines |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3732102C1 (en) * | 1987-09-24 | 1989-05-03 | Gustav Memminger | Thread delivery device for textile machines with different times of thread consumption, in particular knitting and knitting machines |
| DE4032402A1 (en) | 1990-10-12 | 1992-04-16 | Menninger Iro Gmbh | Knitter yarn feed - has controlled yarn retraction to form a yarn reserve during a temporary break in the knitting e.g. slide direction change |
| JPH06272141A (en) * | 1993-03-16 | 1994-09-27 | Tsudakoma Corp | Knit fabric controlling apparatus |
| KR100351612B1 (en) * | 1994-09-02 | 2002-12-26 | 가부시키가이샤 시마세이키 세이사쿠쇼 | Thread length control method in flat knitting machine and its device |
| JP3085638B2 (en) | 1995-01-23 | 2000-09-11 | 株式会社島精機製作所 | Yarn length control device in flat knitting machine |
| DE19537325C1 (en) * | 1995-10-06 | 1996-11-28 | Memminger Iro Gmbh | Yarn feed tension control on flat bed knitting machine |
| JP3603031B2 (en) | 2001-01-31 | 2004-12-15 | 株式会社島精機製作所 | Yarn feeding device |
| ITMI20020945A1 (en) * | 2002-05-03 | 2003-11-03 | Tiziano Barea | METHOD AND DEVICE FOR THE CONSTANT VOLTAGE SUPPLY AND RECOVERY OF A YARN SUPPLIED TO A TEXTILE MACHINE |
| EP1548163B1 (en) | 2002-07-24 | 2012-12-05 | Shima Seiki Manufacturing Limited | Yarn feeding device for flat knitting machine |
| JP4366288B2 (en) | 2004-10-19 | 2009-11-18 | 株式会社島精機製作所 | Knitting machine, yarn processing method in knitting machine, yarn processing control device in knitting machine and program thereof |
| KR101356438B1 (en) * | 2006-09-15 | 2014-01-29 | 가부시키가이샤 시마세이키 세이사쿠쇼 | Method of measuring elastic characteristics of knitting yarn and knitting machine |
| ITMI20100887A1 (en) * | 2010-05-18 | 2011-11-19 | Btsr Int Spa | METHOD AND DEVICE PERFECTED TO POWER A THREAD TO A OPERATING MACHINE WITH TENSION AND CONSTANT SPEED |
| JP6272141B2 (en) | 2014-05-27 | 2018-01-31 | 株式会社Ｓｕｂａｒｕ | Electric motor cooling device |
| EP3230510B1 (en) * | 2014-12-09 | 2021-10-20 | Memminger-IRO GmbH | Method and device for monitoring a knitting machine |
-
2018
- 2018-05-11 JP JP2018092147A patent/JP7048407B2/en active Active
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2019
- 2019-05-07 EP EP19173120.7A patent/EP3567148B1/en active Active
- 2019-05-09 KR KR1020190054097A patent/KR102190613B1/en active IP Right Grant
- 2019-05-10 CN CN201910389212.6A patent/CN110468493B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| KR102190613B1 (en) | 2020-12-14 |
| KR20190129740A (en) | 2019-11-20 |
| JP7048407B2 (en) | 2022-04-05 |
| CN110468493A (en) | 2019-11-19 |
| EP3567148A1 (en) | 2019-11-13 |
| EP3567148B1 (en) | 2021-08-11 |
| JP2019196572A (en) | 2019-11-14 |
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