CN101835930A - Weft knitting machine, and method for detecting abnormal vibrations in the weft knitting machine - Google Patents
Weft knitting machine, and method for detecting abnormal vibrations in the weft knitting machine Download PDFInfo
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- CN101835930A CN101835930A CN200880112500A CN200880112500A CN101835930A CN 101835930 A CN101835930 A CN 101835930A CN 200880112500 A CN200880112500 A CN 200880112500A CN 200880112500 A CN200880112500 A CN 200880112500A CN 101835930 A CN101835930 A CN 101835930A
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- vibration
- cam carrier
- needle
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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
- D04B35/18—Indicating, warning, or safety devices, e.g. stop motions responsive to breakage, misplacement, or malfunctioning of knitting instruments
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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
- D04B15/94—Driving-gear not otherwise provided for
- D04B15/96—Driving-gear not otherwise provided for in flat-bed knitting machines
Abstract
A weft knitting machine can detect abnormal vibrations resulting from an abnormal contact between a carriage and knitting needles, in a high sensitivity. A method can detect those abnormal vibrations. The weft knitting machine comprises a needle bed (1) having a plurality of knitting needles arrayed in parallel, and a carriage (2) running reciprocally over the needle bed (1) for moving the knitting needles back and forth. The carriage (2) includes vibration detecting means (or a vibration sensor (4)), which detects the vibrations to occur in a direction to intersect the running direction of the carriage (2). On the basis of the detection result, abnormal deciding means decides whether or not the abnormal vibrations are caused by the abnormal contact between the carriage (2) and the knitting needles. Even in case the running speed of the carriage (2) is high, the abnormal vibrations can be so detected as are discriminated from the vibrations accompanying the normal knitting operation.
Description
Technical field
The present invention relates to the detection method of the abnormal vibrations in straight-bar machines and the straight-bar machines.
Background technology
All the time, the known straight-bar machines that possesses needle-bar that is arranged with a plurality of knitting needles and the cam carrier that makes the knitting needle advance and retreat by on this needle-bar, back and forth walking.Knitting needle comprises: possess pin main body, needle jack, needle selection slyder, the selection piece of pinhock at front end, these each component parts are fitted to each other successively and are housed in the needle tray of needle-bar.In addition, needle jack, needle selection slyder and selection piece have from the outstanding pin heel of needle tray.On the other hand, cam carrier possesses the knitting cam that cooperates with each pin heel of needle jack and needle selection slyder, the needle selecting cam that cooperates with the pin heel of selection piece.And, by making cam carrier back and forth walking on needle-bar, guide each pin heel and knitting needle is slided in needle tray by these triangles, carry out the braiding of knitted fabric.
In the above-mentioned straight-bar machines, the advance and retreat direction of the direction of travel of cam carrier and knitting needle meets at right angles, and therefore when braiding, each pin heel effect of going up of knitting needle has bigger power.Particularly, remain on the shank and make pinhock enter under the situation of tooth oral-lateral of needle-bar or knitting needle will be introduced under the situation of opposition side of tooth mouth at the stocking yarn that is hooked in pinhock on the tooth mouth at coil, the action load of knitting needle is bigger, and the pin heel of knitting needle may fracture.In addition, accumulate under the situation of needle tray at dust etc., same pin heel also may fracture.The pin heel fractures when also directly continuing braiding, and the fragment that fractures etc. enters braiding (needle selection) triangle or needle tray, or contacts with other knitting needles, thereby worry can cause the secondary damage of straight-bar machines.Therefore, need go out cam carrier such as losing of pin heel by sensor and contact caused abnormal vibrations, even the braid movement of existing side by side stops with the unusual of knitting needle.
As the technology that detects this abnormal vibrations, the technology of record in the known patent documentation 1,2.
In the technology of patent documentation 1, vibrating sensor is set on cam carrier, detects the abnormal vibrations that produces on the direction of travel of cam carrier by this sensor.
In addition, in the technology of patent documentation 2, vacate the interval at the reverse side of needle-bar 1 by magnet a plurality of vibrating sensors 4 are installed, detect the abnormal vibrations (Fig. 7) that on the direction of travel of cam carrier 2, produces by these sensors 4.
Under any situation, all detect the unusual lateral vibration that surpasses the caused lateral vibration of normal braid movement in the vibration (lateral vibration) that on the direction of travel of cam carrier, produces.
Patent documentation 1: Japan opens clear 54-139750 communique in fact
Patent documentation 2: Japan opens clear 56-146793 communique in fact
In above-mentioned prior art, any abnormal vibrations detects all can obtain certain effect, but under the situation of the high speed of implementing braiding speed (speed of travel of cam carrier), abnormal vibrations detects may become not enough.
That is, above-mentioned technology is to detect the technology of all lateral vibrations, and when making braiding speed high speed, the lateral vibration that normal braiding causes becomes big.Consequently, the unusual unusual lateral vibration that causes and the difference that weaves the lateral vibration that causes normally of contacting of cam carrier and knitting needle diminishes, and worry is distinguished both and detected difficulty of abnormal vibrations in high sensitivity.
Summary of the invention
The present invention proposes in view of the above problems, and one of its purpose is, provides cam carrier and knitting needle unusual to be contacted that vibration that the abnormal vibrations that causes and normal braiding cause is distinguished and the straight-bar machines that detects in high sensitivity.
In addition, another object of the present invention is that the detection method of the abnormal vibrations in the straight-bar machines that can detect above-mentioned abnormal vibrations in high sensitivity is provided.
The inventor has carried out all research for the unusual detection that contacts the abnormal vibrations that causes of cam carrier and knitting needle, consequently, the understanding that the vibration that produces on the direction of travel of vibration (compressional vibration) than cam carrier that has obtained producing on the direction that the direction of travel with cam carrier intersects is easy to detect has been finished the present invention.
Straight-bar machines of the present invention possesses the needle-bar and the cam carrier by back and forth walking knitting needle is advanced and retreat that are arranged with a plurality of knitting needles on this needle-bar.In this straight-bar machines, it is characterized in that possessing vibration detecting unit and abnormal deciding means.Vibration detecting unit is located on the described cam carrier, detects the vibration that produces on the direction that the direction of travel with this cam carrier intersects.Abnormal deciding means is judged the unusual abnormal vibrations that causes that contacts that has or not cam carrier and knitting needle according to the testing result of vibration detecting unit.
In the straight-bar machines of the present invention, preferably, the testing result of described abnormal deciding means by vibration detecting unit whether defined threshold with on judge and have or not abnormal vibrations.Under this situation, preferably to be set at fast more then this threshold value of the speed of travel of cam carrier big more for this threshold value.
In addition, in the straight-bar machines of the present invention, preferably, also possesses the detection control module.This detection control module extracts from weave data because of normal braid movement and produces between the non-detection zone that regulation vibrates in the direction that the direction of travel with cam carrier intersects, cam carrier be between non-detection zone during, the vibration detection that described vibration detecting unit is carried out is invalid.
On the other hand, the detection method of the abnormal vibrations in the straight-bar machines of the present invention, detect the unusual abnormal vibrations that causes that contacts of described cam carrier and knitting needle when utilizing straight-bar machines to carry out the braiding of knitted fabric, described straight-bar machines possesses needle-bar and the cam carrier by back and forth walking knitting needle is advanced and retreat that is arranged with a plurality of knitting needles on this needle-bar.In this detection method, it is characterized in that, comprising: the process that detects the vibration that produces on the direction that the direction of travel with described cam carrier intersects; Testing result according to this vibration is judged the unusual process that contacts the abnormal vibrations that causes that has or not cam carrier and knitting needle; And the process of indicating cam carrier to stop according to the detection of this abnormal vibrations.
According to straight-bar machines of the present invention, carry out the detection of compressional vibration by vibration detecting unit.The compressional vibration that normal braid movement causes, littler than its lateral vibration that causes, even and make the speed of travel high speed of cam carrier, also be difficult to become bigger than lateral vibration.On the other hand, cam carrier and knitting needle unusual contacts the unusual compressional vibration that causes, compares enough big with the compressional vibration that normal braid movement causes.Therefore, if carry out the detection of compressional vibration, then unusual compressional vibration and the compressional vibration that normal braid movement causes can be distinguished clearly and detected by vibration detecting unit.
In addition, by vibration detecting unit is set, just a plurality of vibration detecting units need be set on needle-bar on cam carrier, the vibration detection characteristic of vibration detecting unit does not depend on the position on the needle-bar of losing that produces the pin heel yet.
And then, make by abnormal deciding means if the speed of travel of cam carrier is fast more and to judge that employed threshold value is big more, then can avoid the detection omission of abnormal vibrations, flase drop to survey effectively.The unusual size that contacts the unusual compressional vibration that causes of compressional vibration, cam carrier and knitting needle that normal braid movement causes changes according to the speed of travel of cam carrier.Therefore, change by abnormal deciding means if match and to judge employed threshold value, can prevent that then the detection omission of abnormal vibrations, flase drop from surveying with the speed of travel of cam carrier.
And, if the detection control module is set, then can more clearly distinguish the compressional vibration that unusual compressional vibration and normal braid movement cause on straight-bar machines of the present invention.For example, though the switching of knitting cam, thread-carrier linkage pin are the regular events that braiding causes from haunting of cam carrier, the bigger vibration of generation on the direction that the direction of travel with cam carrier intersects sometimes.Therefore, if extract the interval of the action of haunting of the switching of carrying out knitting cam, thread-carrier linkage pin from weave data as between non-detection zone by detecting control module, and the vibration detection that this interval vibration detecting unit is carried out is invalid, even then under the bigger situation of compressional vibration that normal braiding causes, also can flase drop survey and be abnormal vibrations.
According to the detection method of the abnormal vibrations in the straight-bar machines of the present invention, similarly carry out the detection of unusual compressional vibration with above-mentioned straight-bar machines of the present invention.The detection of this unusual compressional vibration is detected in high sensitivity owing to distinguish with normal compressional vibration, therefore under the unusual situation that contacts the abnormal vibrations that causes that produces cam carrier and knitting needle, can braid movement be stopped.
Description of drawings
Fig. 1 represents the straight-bar machines of the present invention of embodiment 1, (A) is the vertical view of this straight-bar machines, (B) is its side view, (C) is the enlarged diagram of the employed set square of this straight-bar machines.
Fig. 2 is the functional block diagram of the straight-bar machines of the present invention of embodiment 1.
Fig. 3 is the flow chart that carries out the step that abnormal vibrations detects in the straight-bar machines of the present invention of expression embodiment 1.
Among Fig. 4, (A) being the key diagram of signal waveform of the detection vibration of expression comparative example, (B) is the key diagram of signal waveform of the detection vibration of expression reference example, (C) is the key diagram of signal waveform of the detection vibration of expression embodiment 1.
Fig. 5 is the functional block diagram of the straight-bar machines of the present invention of embodiment 2.
Fig. 6 is the flow chart that carries out the step that abnormal vibrations detects in the straight-bar machines of the present invention of expression embodiment 2.
Fig. 7 represents the summary of existing straight-bar machines, (A) is the vertical view of this straight-bar machines, (B) is its side view.
Label declaration
1 needle-bar, 2 cam carrier 2A set square 2B knitting cam 2C needle selecting cams
3 tooth mouths, 4 vibrating sensors, 5 filter cells, 6 abnormal deciding means
7 detect the invalid judging unit of extraction unit 7B between the non-detection zone of control module 7A
The specific embodiment
Below, embodiments of the present invention are described with reference to the accompanying drawings.
＜embodiment 1 〉
Fig. 1 schematically represents the needle-bar 1 and the cam carrier 2 of straight-bar machines of the present invention.Herein, with so-called two needle-bar straight-bar machines, promptly have along left and right directions extend and on fore-and-aft direction the straight-bar machines of a pair of needle-bar 1 respect to one another be that example describes.The structure of this needle-bar 1 (knitting needle), cam carrier 2 is identical with known structure basically.That is, many knitting needles (diagram slightly) are arranged and are housed in the needle tray along left and right directions on the needle-bar 1.Cam carrier 2 is structures that a pair of set square 2A of the part of each needle-bar 1 before and after being configured to cover links above tooth mouth 3, can back and forth walk at needle-bar 1 upper edge left and right directions.This set square 2A is provided with knitting cam 2B and needle selecting cam 2C, in the back and forth pin heel of each triangle 2B, 2C guiding knitting needle during walking of cam carrier 2, makes knitting needle along the needle tray action of advancing and retreat.
Herein, in the one side of set square 2A, be on the face of opposition side of outstanding face such as knitting cam 2B vibration detecting unit to be set.Can suit to utilize the vibrating sensor 4 that has used piezoelectric element in the vibration detecting unit.Vibrating sensor 4 is preferably fixed by suitable unit such as screw clamps to the installation of set square 2A.By vibrating sensor 4 is set on cam carrier 2, compare with the situation that vibrating sensor 4 is set on needle-bar 1, less number of sensors gets final product, and the vibration detection characteristic of vibrating sensor 4 also can not depend on the position on the needle-bar 1 of cam carrier 2.And the distribution of vibrating sensor 4 also only is that the minority distribution to cam carrier gets final product, therefore install or when maintenance vibrating sensor 4 and distribution operability good.In addition, by configuration vibrating sensor 4 between a plurality of knitting cam 2B of set square 2A, heel fractures even arbitrary braiding (needle selection) triangle 2B (2C) of set square 2A causes pin, also can be with roughly same size detection vibration.,, on each set square 2A of front and back, a vibrating sensor 4 respectively is set between the two knitting cam 2B gets final product along the two triangle mechanisms that left and right directions is arranged for a pair of braiding (needle selection) triangle 2B (2C) as this example.For so-called three cam mechanisms, on each set square of front and back, two vibrating sensors respectively are set between three knitting cams get final product.Certainly, the installation site of vibrating sensor 4, number are not limited to above-mentioned structure.Also can on each set square of the front and back of three cam mechanisms, a vibrating sensor 4 be set respectively.Usually, vibrating sensor 4 is flat shape, by the detection faces of vibrating sensor 4 is installed on set square 2A abreast, can by vibrating sensor 4 detect with the direction of travel quadrature of cam carrier 2 and with the direction of set square 2A also quadrature on the vibration (orthogonal vibration) that produces.The vibration that is detected by vibrating sensor 4, the effect by piezoelectric element is transformed to detection signal and exports.
The processing unit of this detection signal then, is described according to Fig. 2.Fig. 2 is the functional block diagram relevant with the vibration detection of straight-bar machines of the present invention.
As shown in Figure 2, in the straight-bar machines main body (diagram slightly), constitute filter cell 5 and abnormal deciding means 6.At first, filter cell 5 is removed the composition of detection signal medium-high frequency.Low pass filter can suit to utilize in the filter cell 5.By this filter cell 5, can remove the signal component of the resonance point (for example between 1KHz～2KHz) of vibrating sensor 4, and also can remove the signal component of the orthogonal vibration that normal braid movement causes effectively.The inventor's result of study shows, the signal component of the orthogonal vibration that normal braid movement causes is included in higher frequency band district mostly, thus the signal component of orthogonal vibration that can be when the low frequency zone detects the pin heel fully and fractures.Therefore, if remove radio-frequency component from detection signal, then can remove the signal component of the orthogonal vibration that normal braid movement causes effectively by filter cell 5.But this filter cell 5 in the present invention not necessarily.
In addition, abnormal deciding means 6 by through the signal component of filter cell 5 whether more than defined threshold, judge whether to exist the unusual unusual orthogonal vibration that causes that contacts of cam carrier 2 and knitting needle.
In addition, though not shown, straight-bar machines of the present invention is provided with the display board that shows operation information and remarkable action, fractures etc. and to send the warning lamp of caution to the operator under the situation of abnormal vibrations detecting the pin heel.
On above-mentioned straight-bar machines, detect the pin heel step of abnormal vibrations such as fracture according to Fig. 3 explanation.
At first, obtain the signal component (step S1) of having removed radio-frequency component from the detection signal of vibrating sensor by filter cell.
Then, judge that this signal component is whether more than defined threshold (step S2).For threshold value, the signal value of for example rule of thumb finding out normal braid movement and being produced and setting gets final product.Usually, when the speed of travel of cam carrier accelerated, compressional vibration, cam carrier and the knitting needle that normal braid movement causes unusual contacted caused unusual compressional vibration and all becomes greatly, and when the speed of travel of cam carrier latened, these compressional vibrations also diminished.That is, compressional vibration that the normal braid movement when weaving based on high speed causes and unusual compressional vibration determine under the situation of threshold value that the unusual compressional vibration during the low speed braiding is lower than threshold value sometimes, so worry can have been missed the detection of abnormal vibrations.On the contrary, compressional vibration that the normal braid movement when weaving based on low speed causes and unusual compressional vibration determine under the situation of threshold value that the compressional vibration that the normal braid movement when weaving at a high speed causes surpasses threshold value sometimes, so worry can be measured abnormal vibrations by flase drop.Therefore, judge employed threshold value with matching, can prevent that then above-mentioned detection omission and flase drop from surveying if change by abnormal deciding means with the speed of travel of cam carrier.Especially, because the speed of travel (braiding speed) of the cam carrier of each row of knitted fabric can extract from weave data, so preferably change threshold value according to the braiding speed of extracting from weave data.
As the result of this judgement, if signal component more than threshold value, is then exported alarm signal (step S3).Alarm signal is to indicate braid movement to stop the signal of (action of cam carrier stops) at least.Certainly, preferably with braid movement stop to match, carry out the abnormal show of the lighting of warning lamp, display board by alarm signal.
On the other hand, if the not enough threshold value of signal component among the step S2 is then returned step S1 once more and is obtained the later step of signal component.
According to Fig. 4, compare with comparative example/reference example and to illustrate that above straight-bar machines detects the pin heel principle of abnormal vibrations such as fracture effectively.Among each figure of Fig. 4, solid line waveform is schematically represented the detection signal of the vibration that normal braid movement causes, dotted line waveform is schematically represented the fracture detection signal of the abnormal vibrations that causes of pin heel.
Comparative example (Fig. 4 (A)): the reverse side at needle-bar 1 equally spaced is provided with three vibrating sensors 4, detects the vibration (lateral vibration) of the direction of travel of cam carrier by each vibrating sensor 4.The detection faces of vibrating sensor 4 disposes (prior art that is equivalent to Fig. 7 and patent documentation 2) with respect to the inner face of needle-bar 1 with meeting at right angles.Under this situation, the vibration detection characteristic of each vibrating sensor 4 depends on the position of cam carrier.That is, the signal value of the lateral vibration that normal braid movement causes and the signal value of abnormal vibrations, big more during more near vibrating sensor 4 at cam carrier, and cam carrier vibrating sensor 4 each other in the middle of the time become minimum.Therefore, the signal value the when lateral vibration that normal braid movement causes is big, very little with the difference D1 of abnormal vibrations signal value hour, the setting amplitude of threshold value is subjected to bigger restriction.Especially, cam carrier is walked at a high speed then, and lateral vibration that normal braid movement causes is big more, makes the setting amplitude of threshold value have to set lessly more.Consequently, cause frequent flase drop to survey or detect and omit easily.
Reference example (Fig. 4 (B)): the detection faces of a vibrating sensor being installed with meeting at right angles with respect to the set square of cam carrier, with the vibration (lateral vibration) of the direction of travel that detects cam carrier.Under this situation, the signal value of the lateral vibration that normal braid movement causes and the location independent of cam carrier but the value of constant.But, also be that the fracture difference D2 of signal value of the unusual lateral vibration that causes of the signal value of the lateral vibration that causes of normal braid movement and pin heel is less under this situation, the setting amplitude of threshold value is not compared with comparative example and is had clear improvement.
Embodiment 1 (Fig. 4 (C)): the detection faces of a vibrating sensor being installed abreast with respect to the set square of cam carrier, the vibration (orthogonal vibration) that detects the right angle with respect to the direction of travel and the set square of cam carrier.Under this situation, the signal value of the orthogonal vibration that normal braid movement causes and the location independent of cam carrier but constant, and become with the lateral vibration of reference example and compare quite little signal value.The signal value of the orthogonal vibration when on the other hand, the pin heel fractures is big more than the signal value of the orthogonal vibration that normal braid movement causes.The difference D3 of the signal value of the orthogonal vibration when therefore, the signal value of the orthogonal vibration that causes of normal braid movement fractures with the pin heel is enough big value.Think all the time, the vibration that causes about the walking of cam carrier, owing to braiding (needle selection) triangle and pin are called in person to collide continuously and are produced, so be mainly lateral vibration, detected vibration (comprising vibration and abnormal vibrations that normal braiding causes) lateral vibration that also yes.But, by this inventor's checking, confirmed that the unusual of cam carrier and knitting needle contacts in the abnormal vibrations that causes, orthogonal vibration also has is enough to detected size.This can be speculated as, when the pin heel reaches the degree of losing, the pin heel is pushed by knitting cam and bending, knitting cam is gone up the heel of this crooked pin more or is lost the also remnants of defeated troops of top butt or lose sheet more of back knitting cam in the pin heel, therefore produces bigger orthogonal vibration along with going up more of these knitting cams.In addition, even improve the speed of travel of cam carrier, the signal value of the orthogonal vibration that normal braid movement causes is compared also less with the variation of the signal value of lateral vibration.Therefore, the setting amplitude of threshold value can be widely adopted among the embodiment, abnormal vibrations can be detected in high sensitivity.
＜embodiment 2 〉
Then, though according to Fig. 5 to describing at the embodiment that abnormal vibrations takes place also can only to detect under the situation that vibration that normal braid movement causes is impact, bigger orthogonal vibration.Only to detect control module 7 this point different with embodiment 1 possessing for present embodiment, and other structures are identical with embodiment 1, the therefore following difference that mainly illustrates.
The vibration that the detection control module 7 that present embodiment possesses causes normal braid movement be the situation of impact, bigger orthogonal vibration as extracting between non-detection zone, make that to go up the vibration detection that vibration detecting sensor 4 carries out between non-detection zone invalid.This is so-called " make vibration detection invalid " comprises following any one situation: (1) vibration detecting sensor 4 stops to move and does not carry out the situation of vibration detection itself; (2) carry out vibration detection, but the situation of not carrying out the unusual judgement of abnormal deciding means 6; (3) carry out vibration detection and unusual judge, but the situation of output abnormality judged result not.In a word, even produced the bigger orthogonal vibration that normal braid movement causes, the processing etc. that stops that can not carrying out braid movement gets final product.Detection control module 7 herein possesses extraction unit 7A and invalid judging unit 7B between non-detection zone.
Extraction unit 7A extracts between non-detection zone from weave data between non-detection zone.Weave data is set in the memory cell of straight-bar machines according to braiding conditions such as the size of knitted fabric, color, decorative pattern, braid methods.From this weave data can hold naturally cam carrier walking, stop, can also holding the action step of the straight-bar machines that needs in the braiding of knitted fabrics such as action of braiding (needle selection) triangle.For example, the switching, thread-carrier linkage pin of carrying out knitting cam in the outside of knitting width produces bigger orthogonal vibration during from the haunting of cam carrier on cam carrier.At this moment, if do not make the detection of the orthogonal vibration that the switching etc. of knitting cam causes invalid, then worry can be surveyed the orthogonal vibration of calling in person and fractureing and cause for pin by flase drop.Therefore, in the present embodiment, extract between non-detection zone from weave data by extraction unit 7A between non-detection zone.Between non-detection zone among the extraction unit 7A, preestablish following condition, promptly because a plurality of thread-carrier linkage pins are haunted etc., produce to surpass the threshold value of abnormal deciding means 6 and flase drop is surveyed the condition for the bigger orthogonal vibration of the degree of abnormal vibrations, get final product by whether existing the interval that meets this condition to extract between non-detection zone in the weave data.
On the other hand, invalid judging unit 7B judges that whether the signal component that obtains via vibrating sensor 4, filter cell 5 is the signal component between the non-detection zone that extracts.Then, as if the signal component that is judged as by invalid judging unit 7B between the non-detection zone that has not been to extract signal component, then judge by abnormal deciding means 6 whether this signal component is the signal component that abnormal vibrations produces.
The detection order of the abnormal vibrations of present embodiment is described according to Fig. 6.
At first, obtain by filter cell and remove signal component (step S11) behind the radio-frequency component from the detection signal of vibrating sensor.
Then, by detecting control module, judge that whether signal component is the signal (step S12) between non-detection zone.Also it doesn't matter for this step S12 and next procedure S13 counter-rotating.As the judged result of step S12,, then return step S11 once more and obtain the later step of signal component if be signal between non-detection zone.
On the contrary, if not the signal between non-detection zone, then judge that by abnormal deciding means this signal component is whether more than defined threshold (step S13).
As this judged result, if signal component more than threshold value, is then exported alarm signal (step S14).Carry out this point such as lighting a lamp of the stopping of cam carrier, warning lamp by the output alarm signal identical with embodiment 1.
On the other hand, if do not reach threshold value, then return step S11 once more and obtain the later step of signal component at step S13 signal component.
By above-mentioned present embodiment, except the highly sensitive abnormal vibrations detection of embodiment 1, even under the situation of the bigger orthogonal vibration that the normal braid movement of generation causes, also this orthogonal vibration flase drop can not surveyed is abnormal vibrations.Especially, according to present embodiment, even be positioned at cam carrier under the end situation in addition of needle-bar, the bigger orthogonal vibration flase drop that also normal braid movement can not caused is surveyed and is abnormal vibrations.For example, under situations such as embossing braiding, when being positioned at knitting width inboard, cam carrier also has the situations such as the thread-carrier linkage pin haunts that make.Also produce bigger orthogonal vibration under this situation, but owing to from weave data the thread-carrier linkage pin interval of waiting of haunting will be identified as between non-detection zone, therefore can flase drop surveying be abnormal vibrations.
In addition, the present invention is not limited to above-mentioned embodiment, can carry out various changes.For example, the present invention can be used in the four needle-bar straight-bar machines.In addition, the vibration that is detected by vibrating sensor if not the vibration of the direction of travel (along the direction of set square) of cam carrier, then also can be the vibration of the direction of intersecting with set square on-right angle ground.
The detection method of the abnormal vibrations in straight-bar machines of the present invention and the straight-bar machines can be applied in the employed straight-bar machines of braiding of cylindrical fabric etc. aptly.Especially, wait in expectation application as the higher straight-bar machines of the speed of travel of cam carrier.
Claims (4)
1. a straight-bar machines possesses the needle-bar and the cam carrier by back and forth walking knitting needle is advanced and retreat that are arranged with a plurality of knitting needles on this needle-bar, it is characterized in that possessing:
Vibration detecting unit is located on the described cam carrier, detects the vibration that produces on the direction that the direction of travel with this cam carrier intersects; And
Abnormal deciding means is judged the unusual abnormal vibrations that causes that contacts that has or not cam carrier and knitting needle according to the testing result of this vibration detecting unit.
2. straight-bar machines as claimed in claim 1 is characterized in that,
The testing result of described abnormal deciding means by vibration detecting unit whether defined threshold with on judge and have or not abnormal vibrations,
Fast more then this threshold value of the speed of travel that this threshold value is set at cam carrier is big more.
3. straight-bar machines as claimed in claim 2, it is characterized in that, also possesses the detection control module, this detection control module extracts from weave data because of normal braid movement and produces between the non-detection zone that regulation vibrates in the direction that the direction of travel with cam carrier intersects, cam carrier be between non-detection zone during, the vibration detection that described vibration detecting unit is carried out is invalid.
4. the detection method of the abnormal vibrations in the straight-bar machines, when utilizing straight-bar machines to carry out the braiding of knitted fabric, detect the unusual abnormal vibrations that causes that contacts of described cam carrier and knitting needle, described straight-bar machines possesses needle-bar and the cam carrier by back and forth walking knitting needle is advanced and retreat that is arranged with a plurality of knitting needles on this needle-bar, it is characterized in that, comprising:
Detect the process of the vibration that produces on the direction that the direction of travel with described cam carrier intersects;
Testing result according to this vibration is judged the unusual process that contacts the abnormal vibrations that causes that has or not cam carrier and knitting needle; And
The process of indicating cam carrier to stop according to the detection of this abnormal vibrations.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007-330646 | 2007-12-21 | ||
| JP2007330646 | 2007-12-21 | ||
| PCT/JP2008/003721 WO2009081532A1 (en) | 2007-12-21 | 2008-12-11 | Weft knitting machine, and method for detecting abnormal vibrations in the weft knitting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101835930A true CN101835930A (en) | 2010-09-15 |
| CN101835930B CN101835930B (en) | 2011-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008801125007A Active CN101835930B (en) | 2007-12-21 | 2008-12-11 | Weft knitting machine, and method for detecting abnormal vibrations in the weft knitting machine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2228475B1 (en) |
| JP (1) | JP5362584B2 (en) |
| CN (1) | CN101835930B (en) |
| WO (1) | WO2009081532A1 (en) |
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| CN110520561A (en) * | 2017-03-31 | 2019-11-29 | 耐克创新有限合伙公司 | Knitting machine with electron assistant component |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5013279B2 (en) * | 2009-08-28 | 2012-08-29 | 応用地質株式会社 | Falling rock and landslide detection system |
| EP2415916B1 (en) | 2010-08-04 | 2015-03-04 | L.G.L. Electronics S.p.A. | Method and apparatus for detecting accidental stops of the yarn on a knitting line |
| DE102019109426A1 (en) * | 2019-02-15 | 2020-08-20 | Rheinisch-Westfälische Technische Hochschule (Rwth) Aachen | Method and device for determining an operating state of a loop-forming machine |
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- 2008-12-11 CN CN2008801125007A patent/CN101835930B/en active Active
- 2008-12-11 JP JP2009546930A patent/JP5362584B2/en active Active
- 2008-12-11 WO PCT/JP2008/003721 patent/WO2009081532A1/en active Application Filing
- 2008-12-11 EP EP08864769.8A patent/EP2228475B1/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110520561A (en) * | 2017-03-31 | 2019-11-29 | 耐克创新有限合伙公司 | Knitting machine with electron assistant component |
| US10655254B2 (en) | 2017-03-31 | 2020-05-19 | Nike, Inc. | Knitting machine with electronic auxiliary component |
| TWI743348B (en) * | 2017-03-31 | 2021-10-21 | 荷蘭商耐克創新有限合夥公司 | Knitting machine with electronic auxiliary component and method of knitting a knitted component on a needle bed |
| US11286594B2 (en) | 2017-03-31 | 2022-03-29 | Nike, Inc. | Knitting machine with electronic auxiliary component |
| CN114672923A (en) * | 2017-03-31 | 2022-06-28 | 耐克创新有限合伙公司 | Knitting machine with electronic auxiliary components |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101835930B (en) | 2011-12-21 |
| JP5362584B2 (en) | 2013-12-11 |
| EP2228475A4 (en) | 2013-09-25 |
| EP2228475B1 (en) | 2014-10-08 |
| WO2009081532A1 (en) | 2009-07-02 |
| JPWO2009081532A1 (en) | 2011-05-06 |
| EP2228475A1 (en) | 2010-09-15 |
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