WO2001055022A1 - Procede de detection du point de cassure d'un fil et appareil correspondant - Google Patents
Procede de detection du point de cassure d'un fil et appareil correspondant Download PDFInfo
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- WO2001055022A1 WO2001055022A1 PCT/JP2001/000498 JP0100498W WO0155022A1 WO 2001055022 A1 WO2001055022 A1 WO 2001055022A1 JP 0100498 W JP0100498 W JP 0100498W WO 0155022 A1 WO0155022 A1 WO 0155022A1
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- Prior art keywords
- yarn
- time
- tension
- breakage
- detecting
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000007423 decrease Effects 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims abstract 3
- 238000001514 detection method Methods 0.000 claims description 57
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- 238000005520 cutting process Methods 0.000 claims description 7
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- 230000008859 change Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
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- 238000005259 measurement Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 238000013480 data collection Methods 0.000 description 3
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- 230000006872 improvement Effects 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
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- 238000012360 testing method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
- D06H3/00—Inspecting textile materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/36—Textiles
- G01N33/365—Filiform textiles, e.g. yarns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
- B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
- B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
- B65H63/028—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element
- B65H63/032—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic
- B65H63/0321—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic using electronic actuators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
- B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
- B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
- B65H63/036—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the combination of the detecting or sensing elements with other devices, e.g. stopping devices for material advancing or winding mechanism
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/20—Location in space
- B65H2511/22—Distance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
Definitions
- the present invention relates to a yarn breakage position detection method and a yarn breakage position detection method capable of detecting where a break has occurred when a running yarn is cut in various fiber machines and fiber manufacturing processes.
- a yarn breakage position detection method capable of detecting where a break has occurred when a running yarn is cut in various fiber machines and fiber manufacturing processes.
- the synthetic fiber manufacturing process specifically, the process for manufacturing a processed yarn composed of long fibers, includes processes such as spinning, drawing, and false twisting.
- various guides, rollers, heating devices, false twisting disks, and other processing equipment are arranged over a section having a total length of, for example, 8 to 1 Om. It is produced continuously by running the strip.
- a yarn breakage detector for detecting a yarn breakage of the yarn is provided immediately before the winding section of each weight, and when a yarn breakage occurs, the supply of the yarn of the above-mentioned (1) is stopped.
- a yarn breakage management device that automatically performs appropriate yarn breakage processing is provided to manage yarn breakage. This eliminates the problem that the broken yarn end is wound around a roller or the like, causing the yarn to become thicker, leading to breakage of the adjacent weight, and stable production is being performed.
- the problem to be solved by the present invention is to develop a method for clarifying the factor of thread breakage at the time of thread breakage and a means therefor in view of the above-mentioned problems.
- An object of the present invention is to provide a method for measuring a yarn breakage position and an apparatus therefor, which can immediately identify which part of the yarn breakage has occurred.
- a yarn breakage position detecting method for detecting a cutting position of a yarn traveling in a yarn processing device, wherein the tension of the traveling yarn is monitored to cut the yarn. Detects the occurrence of the cut, detects that the end of the cut yarn passes through the reference position, and detects the time from the occurrence of the cut of the yarn until the end of the yarn passes the reference position, Calculating a thread break position relative to the reference position based on the detected time.
- a yarn breakage position detecting device that detects a cutting position of a yarn traveling in a yarn processing device, and detects a tension of the yarn traveling in contact with the traveling yarn.
- a tension detector provided at a reference position to detect the first point in time when the running yarn is cut from the tension signal of the tension detector; Disconnect from Yarn end passage detecting means for detecting a second point in time when the end of the thread passes the reference position, and a yarn breakage with respect to the reference position based on the first and second points in time.
- a yarn breakage position detecting device comprising a position detecting means for detecting an occurrence position.
- the time point at which the yarn break occurs is detected, and then the time point at which the yarn end of the broken yarn passes is detected at a predetermined reference position. . Then, based on the information calculated from the time difference between the time point of occurrence of the yarn break detected in this way and the time point of passing the yarn end formed by the breakage, the reference position is set as the starting point. It is characterized by finding the position where the thread break occurs.
- the method for detecting a yarn breakage position and the apparatus therefor it is possible to detect not only whether or not a yarn breakage has occurred as in the prior art, but also the position where the yarn breakage has occurred in the prior art. Can also be detected. For this reason, in the above-mentioned steps, it is possible to immediately identify which processing member caused the yarn breakage. For this reason, it is possible to identify the position where frequent yarn breaks occur, in other words, the specific processing member or processing site where frequent yarn breaks occur, and to quickly determine the cause of yarn breakage and its countermeasures.
- the above object of the present invention can be achieved.
- each weight is simply provided at the respective reference position. It is only necessary to install a tension detector. For this reason, the structure is extremely simple, and there is an effect that a contact portion with the yarn can be minimized in a region where the yarn is processed.
- the tension detector is It is preferable to use a contact-type tension detector that detects the yarn tension by bringing a tension detection guide or the like into contact. Above all, it is preferable that the contact with the running yarn can be reliably maintained until the yarn end passes, and the adverse effect such as abrasion damage to the yarn is small, and the contact portion with the yarn from this surface is small. Things are more preferred.
- a tension detector there is a cantilever type tension detector described later having one contact point, and as a tension detection guide for ensuring the contact with the traveling yarn, A ring guide or a U-shaped thread guide may be used.
- the other well-known yarn guide and tension detection guide are arranged along the yarn path of the traveling yarn, and the tension of the yarn is changed by the reaction force received from the yarn and the displacement or distortion of the tension detection guide.
- a commercially available product can be used as it is for the tension detector of the detection method.
- the method of arranging the yarn guide and the tension detection guide along the yarn path is to maintain the yarn securely on the tension detection guide until the yarn end passes the reference point. It can be applied preferably because of its superiority.
- the tension detector of the present invention a configuration in which the tension detection guide is supported by an elastic body such as a panel and the displacement thereof is detected is preferable from the following points.
- the thread end of the broken thread is used to detect the reference position (specifically, when the thread end passes through the tension detection guide), and the tension detection guide that appears in the tension signal after passing through the thread end is used.
- the tension detection guide that appears in the tension signal after passing through the thread end is used.
- the means for detecting the yarn breakage position is applicable as long as the position where the yarn breakage occurs can be appropriately identified according to the purpose.
- the yarn end that has been broken from the time when the The arithmetic means for calculating the yarn breakage position from the reference position based on the yarn length obtained by arithmetically multiplying the time elapsed until the point when the yarn passes through by the running speed of the running yarn is detected. Means are preferred from the viewpoint of versatility and cost.
- the measured value of the yarn length was corrected by the yarn elongation under tension applied to the running yarn before the yarn breakage, and the elongation during running was corrected. It is more preferable to determine the yarn length and use this corrected yarn length as the yarn break generation position from the reference position. However, if it is only necessary to be able to identify which processing device caused the yarn breakage in the above-mentioned process, detection accuracy is not so required, and such a configuration can be omitted.
- FIG. 1 is a graph showing the change over time of the output signal of the tension detector when a yarn break occurs in the embodiment of the present invention.
- FIG. 2 is a flow chart of the basic processing means of the embodiment of the present invention
- FIG. 3 is a flow chart of the yarn breakage position detection of the embodiment of the present invention
- FIG. 4 is a view showing a false twisting machine to which the present invention is applied as an example.
- FIG. 1 is a graph showing a change over time of an output signal of a tension detector when a yarn breakage occurs in the embodiment.
- FIG. 2 is a flowchart showing the scanning means of the tension detector of the embodiment, and
- FIG. 3 is a flowchart of the yarn breakage position measurement processing of the embodiment.
- Figure 4 shows the actual It is an explanatory view showing the composition of the false twisting machine to which the example was applied. It should be noted that the present invention is not applied only to the false twisting step shown in FIG. 4, and the detailed description is omitted here. However, it is not applicable to other spinning steps, caro heat drawing steps, and the like. Needless to say.
- the false twisting machine illustrated in FIG. 4 is known in Japanese Patent Publication No. 62-123327, etc., and the yarn Y supplied from the yarn package 1 passes through the guide roller 2. Then, it is supplied from the feed roller 3 to the yarn processing area. Then, the yarn Y supplied to the yarn processing area provided over a predetermined section is heated by a heating device 4, a cooling device 5, a false false twisting device 6 having both a twisting action and a feeding action, a delivery roller 7, and the like. Is processed by the processing member.
- the yarn Y is false-twisted by the friction false twisting device 6 while being stretched at a stretching ratio determined by a feed speed ratio between the feed roller 3 and the delivery roller 7.
- the false twist that has gone back to the heating device 4 is heat-set in a false twist form by the heating device 4 and the cooling device 5, and thus the yarn Y is subjected to a predetermined false twisting process.
- the false twisted yarn is untwisted, and then the yarn Y supplied to the delivery roller 7 is directed by the two guide rollers 2. It is converted and formed into a processed yarn package 8 by a winding machine not shown.
- a yarn breakage management device including a computer 12 is provided.
- the false twisting machine includes a tension detector 11 for measuring the yarn tension in the yarn processing area, which is a basic element of the yarn breakage position detecting device of the present invention, and the tension detector 11 is the most downstream in the yarn processing area. It is provided between the friction false twisting device 6 and the delivery roller 7 and is connected to the computer 12.
- the tension detector 11 can be suitably used as long as it can measure the tension of the yarn by coming into contact with the traveling yarn. In this example, as shown in the figure, there is a tension detection guide 1 la supported by a cantilevered elastic body that has little adverse effect on the yarn Y due to the tension measurement. A commercially available tension detector 11 1 that detects the strain and detects the tension of the yarn Y was used.
- a guide groove is provided at the contact point between the tension detection guide 11a and the yarn Y so that even when the yarn is broken, the running yarn Y and the tension detection guide are kept until the yarn end passes. This ensures that contact with the gate 11a can be maintained.
- a l 2 O 3, T i 2 O 3 ceramic, such as box or a hard click Romume onto gold Shokuhaha material It is preferable to use a material provided with a protective layer such as a lumber, since the surface of the guide is less likely to be scratched or worn by contact with the yarn.
- a three-guide type tension detector provided with two guides for fixing the thread path before and after the aforementioned tension detection guide, one of the two guides The omitted two-guide tension detector can also be applied.
- FIG. 1 shows a graph of the tension signal T, which is a result of actually measuring a change with time of the yarn tension at the time of yarn breakage by the tension detector 11.
- the time point at which the yarn break occurs is indicated by reference numeral S
- the time point at which the yarn end formed by the thread break passes through the tension detection guide 1 la is indicated by reference numeral D.
- the tension signal T from the tension detector 11 shows a fluctuation pattern in which the peak value temporarily rises from the steady operation value at the time point S, then drops sharply, then rises a little, and then drops. ing.
- the tension signal T gradually decreases to zero level while superimposing a periodically attenuating periodic signal having a predetermined period. It is known that the periodic signal detected at this time is caused by natural vibration of the tension detection guide system.
- the change in the tension signal T after the occurrence of thread breakage can be approximated by a first-order lag system as a whole, as shown in Fig.
- Reference numeral ⁇ in the figure is a thread break determination set value used to determine the occurrence of a thread break, which will be described later, and reference numeral B is a lower limit used to detect the passage of the broken yarn end. A> B.
- the present invention has been made by analyzing the tension behavior at the time of yarn breakage described above.
- the present invention provides a tension detector 11, a yarn breakage detection means 20, a yarn
- the end passage detecting means 21 and the position detecting means 22 are configured to perform various processes as illustrated in FIG.
- LPF low-pass filter
- the basic processing means sequentially scans the tension detector 11 of each ⁇ to collect the tension data of each weight, and determines the occurrence of a yarn break.
- a thread break processing function section for performing necessary thread break processing.
- the data collection function resets the ⁇ number P as shown in FIG. 2 (S 1), reads the tension signal T p from the tension detector 11 of the weight P (S 2) Then, the moving average processing is performed (S3), and the result is stored (S4).
- a scroll storage method of sequentially storing a predetermined number of latest data sampled for at least a predetermined time required for detecting the yarn breakage position is saved.
- the thread break processing unit determines whether or not a thread break has occurred (S5). If no break has occurred, the spindle number P, which has determined whether or not a break has occurred at that time, is performed. Move up by 1 (S11), if it is not the last spindle number (S10) Check data for the next spindle in the same way as above to check for thread breaks across all spindles . Then, when the confirmation of the occurrence of thread breakage of all the spindles is completed, the spindle number P is reset (S 1) and data is collected from the first spindle.
- the moving average value of the obtained tension signal T p (n) is compared with a preset thread break set value A to determine whether a thread break has occurred.
- the result of S5 is NO, that is, if the tension signal is equal to or greater than the thread break set value A
- the data collection function that collects the tension data of each weight as it is When the process returns and the occurrence of thread break is detected, the thread break process described below is performed. That is, if the result of S5 is YS (that is, if the moving average value of the tension signal is less than the preset thread break set value A), it is determined that a thread break has occurred (S6).
- a yarn breakage signal for operating a yarn breakage processing member such as a yarn feed cutter is output by the yarn breakage management device to the weight determined to have a yarn breakage (S7). Further, along with this, data such as the detection time No. necessary for the detection of the thread breakage position or maintenance management described below and the tension value Tp (No) at that time are stored (S8), and then the detection of the yarn breakage position is performed. Invokes a routine. Next, the procedure returns to the data collection function section, and the tension data of the next weight is collected (S9).
- a yarn breakage generation detecting process for detecting the yarn breakage generation starts.
- the thread breakage detection processing is based on the tension signal T p ( ⁇ ) stored in the scroll of the weight P and is retroactively determined from the thread breakage determination time point No as follows. Is detected. Book
- the steady-state value detection method is used as the basis, combined with the peak detection method that detects the peak value generated at the time of yarn breakage, which is unique to this example.
- T p (n-1) and TP (n) (in this case, the initial value of n is No.), which are continuously traced, are called (S 20), and the peak In the judgment step, it is judged whether or not there is a peak value (S21).
- the measured value T p (n) at the time point n and the measured value T p ( ⁇ -1), and the time when ⁇ ⁇ ( ⁇ ) ⁇ ⁇ ⁇ ( ⁇ -1) holds is determined as the “peak value time”.
- n is retroactively set to one (n — 1) (S 23), and the next retroactive value TP (n-1) is calculated. Then, the next retrospective value T p (n-2) is called, and the peak value determination step and the steady value determination step are performed for T p (n-1) and T p (n-2). This is repeated retrospectively until it reaches the normal value.
- the peak point in FIG. 1 is detected as the point of occurrence of thread breakage in the peak determination step, so that the detection can be performed as accurately as possible. If such a peak is not observed, in the step of determining the steady value, the point at which the tension falls by a fixed value ct or more from the steady value of the tension during steady operation is detected as the time of thread breakage occurrence. To ensure the stability and reliability of detection. In this way, when the time point of the occurrence of the thread break is detected, this time point is stored as the time point S of the thread break occurrence. Therefore, as shown in the actual measurement example in FIG. 1, the time point S at which the thread break occurs can be detected accurately. It should be noted that the latter steady value detection method alone is sufficient for specifying the thread breakage occurrence site, and in some cases, only one of these is sufficient.
- the detection of the point of occurrence of thread breakage can be performed by an electronic circuit such as a comparator circuit.
- the necessary thread breakage processing is performed by the scanning means, there is no need to speed up this detection processing.
- Computer software processing is advantageous in terms of versatility and operability. Even in the soft processing, a large decrease in tension is observed at the time of thread breakage as in the actual measurement example. Therefore, instead of this example, the differential value of the tension signal or the decrease in a fixed time (usually the scanning cycle) is used. A method in which the time when the value becomes equal to or more than a predetermined value is regarded as the time when the yarn breakage occurs can be applied.
- the processing enters the yarn end passing detection processing by the yarn end passing detecting means, and the time at which the yarn end passes at the reference position is detected.
- this detection in this example, a double detection method that uses an eigen-vibration detection method and a lower-limit detection method with different detection principles is used as follows. That is, in the tension detector 11 in which the yarn Y comes into contact with the tension detection guide 11a, the broken yarn end becomes apparent after passing, and is unique to the tension detection guide system illustrated in FIG. The method is based on the method of detecting the natural vibration of an object. In this case, if the natural vibration is not found, the time when the predetermined value becomes equal to or lower than the lower limit set value B set in advance for detecting the yarn end passing is detected, and the passing time is obtained.
- the yarn end passage detection processing of this example includes a natural vibration determining step (S25) for detecting the start of the natural vibration and a lower limit determining step (S26).
- the natural vibration determination step (S25) first, the tension signal T p (n) after the elapse of a predetermined time determined by the actual test after the yarn breakage occurrence determination and the next T p ( ⁇ + 1) to determine whether T p (n) ⁇ ⁇ ( ⁇ + 1) holds (substep 1), and when this relationship holds, this T p (n) is The minimum value min is stored together with this time point n, and the minimum value establishment flag is set. If this relationship does not hold, the determination in substep 1 is NO, and the flow proceeds to the next lower limit determination step (S26).
- the flow proceeds to the lower limit determination step (S26) as shown.
- the determination step of the lower limit value is that the tension signal T p ( ⁇ ) does not continue for a predetermined time or more when the tension signal T p ( ⁇ ) is equal to or less than a predetermined value (specifically, 25% or less in this example) of the steady value before thread breakage. Then, if the result is NO, the time point n is set to the next time point (n + 1), the process returns to the natural vibration determining step, and the above-mentioned steps are repeated.
- step S26 determines whether the tension signal falls below the lower limit. If the determination in step S26 is YES, that is, if the tension signal falls below the lower limit, the flow proceeds to the step of storing the yarn end passing time D (S27). In this case, the time point n when the tension signal falls below the set value is stored as the thread end passing time point D. This improves the reliability of the detection of the yarn end passage when the natural vibration is not clear. In the example of Fig. 1, it was detected by the natural vibration method, and the point at which the yarn end passed was D. However, in this example, it is d in the lower limit detection method.
- the yarn end passage detecting means has completed the predetermined processing.
- the position measuring process is started by the position measuring means, and the yarn breakage position is measured as follows. That is, the travel time L of the yarn end from the yarn break occurrence position to the reference position is known as the time difference from the yarn break occurrence time point S detected above to the yarn end passage time point D, and the yarn end ( That is, since the traveling speed V of the yarn Y) is determined to be a predetermined value from the winding speed of the yarn Y, the distance from the reference position to the yarn breakage occurrence position P can be measured as the product LXV. .
- the point of occurrence of yarn breakage is detected in a predetermined section such as the thread processing area, and then the point of passage of the broken yarn end at a reference position downstream of this predetermined section is detected.
- the thread break position can be measured based on the elapsed time.
- the yarn Y is running in a state where a constant tension is applied in the steady operation, so that it is preferable to correct the yarn Y precisely.
- the traveling speed V of the yarn Y set in advance based on the difference between the two points in time and the running speed V From the steady tension value Ts, the yarn length from the reference position, that is, the yarn breakage position P is determined by the following equation (1).
- the thread position P obtained in this way is converted into a predetermined format for convenient later use, and is stored together with the thread break occurrence time S and the yarn end passage time D. (S29).
- the present invention has a simple configuration in which the tension at each reference position is measured by a tension detector or the like. This realizes a yarn breakage position measurement method that can also measure the occurrence position online, and a device therefor.
- the fiber manufacturing plant where the processing process becomes longer and more complicated due to the direct connection of the process, while minimizing the adverse effect on the yarn quality due to the installation of the tension detector This makes a great contribution to the analysis of the factor of thread breakage online.
- the stabilization of the process can be achieved early by taking measures to reduce the yarn breakage as soon as possible, which greatly contributes to both productivity improvement and yarn quality improvement.
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- Quality & Reliability (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Materials Engineering (AREA)
- Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020017012315A KR20020003221A (ko) | 2000-01-28 | 2001-01-25 | 단사 위치 검출 방법 및 이를 위한 장치 |
EP01946832A EP1197462A4 (en) | 2000-01-28 | 2001-01-25 | METHOD FOR DETECTING THE CUTTING POINT OF A WIRE AND APPARATUS THEREOF |
US09/936,292 US6536643B2 (en) | 1999-08-10 | 2001-01-25 | Method for detecting break point of thread and apparatus therefor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000020098A JP2001208528A (ja) | 2000-01-28 | 2000-01-28 | 断糸位置測定装置 |
JP2000-020098 | 2000-01-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001055022A1 true WO2001055022A1 (fr) | 2001-08-02 |
Family
ID=18546715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/000498 WO2001055022A1 (fr) | 1999-08-10 | 2001-01-25 | Procede de detection du point de cassure d'un fil et appareil correspondant |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1197462A4 (ja) |
JP (1) | JP2001208528A (ja) |
KR (1) | KR20020003221A (ja) |
CN (1) | CN1173871C (ja) |
TW (1) | TW479130B (ja) |
WO (1) | WO2001055022A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6874615B2 (ja) | 2017-09-21 | 2021-05-19 | 株式会社島津製作所 | 材料試験のノイズ除去方法および材料試験機 |
CN108842237B (zh) * | 2018-06-29 | 2020-03-17 | 无锡市华文机电有限公司 | 一种纺机断纱信号的传输方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4477398A (en) * | 1982-07-06 | 1984-10-16 | Eastman Kodak Company | Yarn monitoring process |
JPH10151289A (ja) * | 1996-11-21 | 1998-06-09 | Brother Ind Ltd | ミシンの糸切れ検出装置 |
JPH11139690A (ja) * | 1997-11-04 | 1999-05-25 | Murata Mach Ltd | 自動ワインダ |
-
2000
- 2000-01-28 JP JP2000020098A patent/JP2001208528A/ja active Pending
-
2001
- 2001-01-20 TW TW090101564A patent/TW479130B/zh not_active IP Right Cessation
- 2001-01-25 KR KR1020017012315A patent/KR20020003221A/ko not_active Application Discontinuation
- 2001-01-25 CN CNB018000738A patent/CN1173871C/zh not_active Expired - Fee Related
- 2001-01-25 EP EP01946832A patent/EP1197462A4/en not_active Withdrawn
- 2001-01-25 WO PCT/JP2001/000498 patent/WO2001055022A1/ja not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4477398A (en) * | 1982-07-06 | 1984-10-16 | Eastman Kodak Company | Yarn monitoring process |
JPH10151289A (ja) * | 1996-11-21 | 1998-06-09 | Brother Ind Ltd | ミシンの糸切れ検出装置 |
JPH11139690A (ja) * | 1997-11-04 | 1999-05-25 | Murata Mach Ltd | 自動ワインダ |
Non-Patent Citations (1)
Title |
---|
See also references of EP1197462A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP1197462A4 (en) | 2004-10-06 |
TW479130B (en) | 2002-03-11 |
EP1197462A1 (en) | 2002-04-17 |
JP2001208528A (ja) | 2001-08-03 |
CN1358156A (zh) | 2002-07-10 |
KR20020003221A (ko) | 2002-01-10 |
CN1173871C (zh) | 2004-11-03 |
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