EP1795477B1 - Bobinoir - Google Patents

Bobinoir Download PDF

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Publication number
EP1795477B1
EP1795477B1 EP20060124374 EP06124374A EP1795477B1 EP 1795477 B1 EP1795477 B1 EP 1795477B1 EP 20060124374 EP20060124374 EP 20060124374 EP 06124374 A EP06124374 A EP 06124374A EP 1795477 B1 EP1795477 B1 EP 1795477B1
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EP
European Patent Office
Prior art keywords
yarn
speed
winding
drum
package
Prior art date
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Active
Application number
EP20060124374
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German (de)
English (en)
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EP1795477A1 (fr
Inventor
Kenji c/o Murata Kikai Kabushiki Kaisha Kawamoto
Makoto c/o Murata Kikai Kabushiki Kaisha Ito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Machinery Ltd
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Murata Machinery Ltd
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Publication date
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Publication of EP1795477A1 publication Critical patent/EP1795477A1/fr
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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
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/40—Arrangements for rotating packages
    • B65H54/42—Arrangements for rotating packages in which the package, core, or former is rotated by frictional contact of its periphery with a driving surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H61/00—Applications of devices for metering predetermined lengths of running material
    • B65H61/005—Applications of devices for metering predetermined lengths of running material for measuring speed of running 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
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a winder according to the preamble of claim 1.
  • a winder of a contact drum type conventionally winds a yarn on a bobbin to form a package.
  • means for rotationally driving the package is a drum that rotates in contact with a package to concurrently rotate the package (see, for example US-A-4 049 211 and the Unexamined Japanese Patent Application Publication (Tokkai-Hei) No. 5-246619 ).
  • Figure 4 of the accompanying drawings shows a drum 10 and a cone winding package 4 which are provided in a contact drum type winder.
  • the cone winding means that a bobbin 13 is shaped like a cone (cylinder shaped similarly to a truncated cone) so that a package 4 formed on the bobbin 13 is shaped like a cylinder similar to a truncated cone.
  • the package 4 is rotated by contacting with the drum to receive a rotational driving force from the drum 10.
  • the package 4 substantially contacts with the drum 10 at a driving point P that is a point in an axial direction, to receive a rotational driving force from the drum 10 at the driving point P.
  • the package 4 since the package 4 is conical, its diameter varies in the axial direction.
  • the outer peripheral length of the package 4 varies depending on an axial position on the package 4. Thus, it is impossible that the package 4 receives the rotational driving force from the drum 10 at two different axial points.
  • the package always receives the rotational driving force only at the driving point P which is a point in the axial direction.
  • the position of the driving point P varies depending on the center of gravity of the package.
  • an increase in the diameter of the package 4 and thus in its weight moves the position of the driving point P toward a larger diameter side of the package 4 in the axial direction.
  • Figure 2 shows how the traveling speed of a yarn (hereinafter referred to as a yarn speed) being wound into a cone winding package varies with the winding diameter of the package.
  • the yarn speed is in proportion to the rotation speed of the drum and such that detecting the rotation speed of the drum enables the yarn speed to be calculated.
  • the actual yarn speed is not in proportion to the rotation speed of the drum.
  • the yarn speed itself is not controlled.
  • the actual yarn speed may reach an unexpected value.
  • yarn quality itself may be affected; a winding tension of an unexpected magnitude may occur.
  • a problem to be solved by the present invention is that with a contact drum type winder, even when the rotation speed of the drum is controlled on the basis of detection of the drum rotation speed in order to control the yarn speed, the actual yarn speed may reach an unexpected value.
  • the fixed yarn speed allows the yarn to be wound into a package without varying tension applied to the yarn being wound into the package. This results in an appropriate package shape to offer a uniform unwinding speed during unwinding, thus improving yarn quality. Moreover, the yarn speed does not vary and can thus always be set at the maximum value that can be achieved by the winder. This improves production efficiency.
  • a similar winder, but for winding packages having a cylindrical shape is known from US-A-4 049 211 . Due to the cylindrical shape of the packages the problem of the varying driving point does not occur.
  • the automatic winder rewinds a yarn from a supplying package 2 produced by a spinning machine or the like to form a winding package 4 of a predetermined shape.
  • the automatic winder comprises a large number of winding units 1 each of which rewinds a single package.
  • the supplying package 2 is placed at the bottom of the winding unit 1, whereas the winding package 4 is placed at the top of the winding unit 1.
  • An unwinding assisting device 5, a variable tension device 6, a yarn splicing device 9, a yarn speed sensor 7, a yarn defect detecting device 8, and a traverse drum 10 are arranged in the winding unit 1 along a route for a yarn 3 extending from the supplying package 2 to the winding package 4.
  • the winding unit 1 also comprises a drum driver 11 that rotationally drives the traverse drum 10 and a sequencer 12 that instructs the drum driver 11 to control the rotational driving of the traverse drum 10.
  • the unwinding assisting device 5 controls an unwinding balloon that is generated while the yarn 3 is being unwound from the supplying package 2 in its axial direction.
  • the unwinding assisting device 5 comprises an umbrella-shaped cylindrical member 51 that covers a bobbin 21 for the supplying package 2, and a driving mechanism 52 that lowers the cylindrical member 51 while maintaining a substantially fixed gap f ⁇ between the cylindrical member 51 and a chess portion of the supplying package 2.
  • the cylindrical member 51 is controlled so that it has a substantially fixed balloon diameter during unwinding.
  • variable tension device 6 applies a variable winding tension to the yarn 3 being unwound from the supplying package 2.
  • the variable tension device 6 comprises fixed comb teeth 61 and movable comb teeth 62 alternately arranged opposite one another across the route for the yarn 3, and a driving mechanism 63 such as a solenoid which increases or reduces the amount of engagement between the comb teeth 61 and the comb teeth 62.
  • variable tension device 6 controls the amount by which the movable comb teeth 62 engage with the fixed comb teeth 61, that is, the degree of zigzag bending of the yarn route.
  • the variable tension device 6 can thus sequentially control the winding tension applied to the yarn 3.
  • the yarn speed sensor 7 is a device that detects the traveling speed of the yarn 3 (yarn speed) in a non-contact manner.
  • the yarn speed sensor 7 comprises a plurality of optical yarn thickness detecting devices along a yarn traveling direction, and the yarn speed sensor 7 utilizes a space filter system to detect the traveling speed of the yarn 3 on the basis of output signals from the yarn detecting means located at different position in the yarn traveling direction.
  • the optical yarn thickness detecting device comprises a light receiving element and a light source.
  • the quantity of light received by the light receiving element varies depending on the thickness of the yarn 3 passing at the detection position of the yarn detecting means.
  • the yarn thickness detecting device thus outputs an electric signal corresponding to the yarn thickness.
  • the yarn defect detecting device 8 Upon detecting a yarn defect such as a slab on the yarn 3, the yarn defect detecting device 8 cuts the yarn 3.
  • the yarn defect detecting device 8 comprises a yarn thickness detecting device 81 that detects the thickness of the passing yarn 3, a yarn detect determining device 82 that determines whether or not the yarn thickness corresponds to a yarn defect, and a yarn cutting device 83 that cuts the yarn 3 when it is determined to have a defect.
  • the thickness of the yarn 3 passing by the yarn thickness detecting device 81 is input to the yarn defect determining device 82 as an electric signal.
  • the yarn defect determining device 82 arithmetically compares the electric signal for the yarn thickness with a reference value. When the electric signal exceeds a tolerance, the yarn defect determining device 82 determines that a yarn defect has passed by and immediately outputs a yarn cut instruction signal to the yarn cutting device 83.
  • the yarn cutting device 83 is then actuated to forcibly cut the yarn.
  • a yarn traveling signal from the yarn cutting device 81 is turned off.
  • the yarn defect determining device 82 senses the yarn breakage and transmits a stop signal for the traverse drum 10 to the drum driver 11 via the sequencer 12. This stops rotating the traverse drum 10.
  • the yarn thickness detecting device 81 provided in the yarn defect detecting device 8, also comprises a light receiving element and a light source.
  • the yarn thickness detecting device outputs an electric signal for the yarn thickness.
  • the yarn splicing device 9 splices a lower yarn of the supplying package 2 side and an upper yarn of the winding package 4 side.
  • the yarn 3 is separated into an upper yarn and a lower yarn.
  • the yarn splicing device 9 carries out splicing to resume rewinding the yarn around the winding package 4.
  • the yarn defect determining device 82 transmits a yarn splicing instruction signal to the yarn splicing device 9 via the sequencer 12 in order to actuate the yarn splicing device 9.
  • the yarn splicing device 9 comprises an air nozzle device 91 that uses an air current to entangle fibers of the upper and lower yarns with one another for splicing, a lower yarn sucking device 92 that sucks, catches, and guides the lower yarn to the air nozzle device 91, and an upper yarn sucking device 93 that sucks, catches, and guides the upper yarn to the air nozzle device 91.
  • the lower yarn sucking device 92 comprises a main body composed of a suction pipe that sucks and catches the yarn 3, and a suction port 92a at the leading end of the suction pipe is pivotable around an axis 92b at the trailing end of the suction pipe.
  • Vertical pivoting of the suction pipe moves the suction port 92a between the air nozzle device 91 and a position above the unwinding assisting device 5.
  • the upper yarn sucking device 93 is similarly configured.
  • the upper yarn sucking device 93 comprises a main body composed of a suction pipe that sucks and catches the yarn 3.
  • a suction port 93a at the leading end of the suction pipe is pivotable around an axis 93b at the trailing end of the suction pipe.
  • Vertical pivoting of the suction pipe moves the suction port 93a between the air nozzle device 91 and a peripheral surface of the winding package 4.
  • the yarn defect detecting device 8 When the yarn defect detecting device 8 forcibly cuts the yarn on the basis of detection of a yarn defect by the yarn defect detecting device 8, the upper yarn is wound around the winding package 4, and on the basis of the yarn splicing instruction signal, the lower yarn is caught by the lower yarn sucking device 92 having the suction port 92a standing by above the unwinding assisting device 5.
  • the upper yarn is caught by the upper yarn sucking device 93 having the suction port 93a standing by over the peripheral surface of the winding package 4.
  • the lower yarn sucking device 92 subsequently moves the suction port 92a upward to guide the lower yarn to the air nozzle device 91, and the upper yarn sucking device 93 moves the suction port 93a downward to guide the upper yarn to the air nozzle device 91.
  • the air nozzle device 91 splices the upper yarn and lower yarn together.
  • the traverse drum 10 is a device that transversely wounds the yarn 3 into the winding package 4.
  • the traverse drum 10 has a function for swinging the yarn 3 in the axial direction of the winding package 4 and a function for rotating the winding package 4 to wind the yarn 3 on the winding package 4.
  • the function serving as winding means is implemented by forming the traverse drum 10 into a cylindrical rotating member.
  • the traverse drum 10 is placed so that its outer peripheral surface contacts with the outer peripheral surface of the winding package 4. In this state, rotation of the traverse drum 10 rotates the winding package 4 in conjunction with the traverse drum 10.
  • the function serving as traverse means is implemented by a groove 10a which is formed in the outer peripheral surface of the traverse drum 10 and through which the yarn 3 is guided.
  • This groove is formed so as to be displaced in the axial direction of the traverse drum 10 along its circumferential direction.
  • the yarn 3 guided through the groove 10a is swung in the axial direction of the traverse drum 10 in conjunction with rotation of the traverse drum 10.
  • the winding package 4 is formed by cone winding.
  • the bobbin 13 for the winding package 4 is shaped like a cone (cylinder shaped like a truncated cone).
  • the yarn 3 is wound around the outer peripheral surface of the bobbin 13 while being traversed. Consequently, a winding diameter of the yarn 3 is uniform perpendicularly to the axial direction of the bobbin 13.
  • the winding package 4 formed by winding the yarn 3 on the bobbin 13 is conically wound.
  • the bobbin 13 is supported by a cradle arm (not shown in the drawings) so that the outer peripheral surface of the winding package 4 (bobbin 13) is always in contact with the outer peripheral surface of the traverse drum 10.
  • the cradle arm has a supporting position of the bobbin 13 which is varied with an increase in the winding diameter of the winding package 4, formed on the bobbin 13.
  • the bobbin 13 is supported by the cradle arm so that the lower end of outer peripheral surface of the winding package 4 (bobbin 13) is parallel to the upper end of outer peripheral surface of the traverse drum 10. This allows the entire lower end of outer peripheral surface of the winding package 4 (bobbin 13) to be kept in contact with the entire upper end of outer peripheral surface of the traverse drum 10. The bobbin 13 is thus placed over the traverse drum 10.
  • the driving point P (the contact point between the winding package 4 and the traverse drum 10) will now be described.
  • the outer peripheral surfaces of the winding package 4 and traverse drum 10 are substantially in point contact with each other at one point.
  • the position of the point contact corresponds to the driving point P. That is, the winding package 4 (bobbin 13) is provided with the rotating force of the traverse drum 10 only at the driving point P.
  • the winding package 4 (bobbin 13) is provided with the rotating force only at the driving point P for the following reason.
  • the winding package 4 (bobbin 13) Since the winding package 4 (bobbin 13) is conical, its outer peripheral length varies in its axial direction. On the other hand, the peripheral speed provided by the traverse drum 10 is the same regardless of the axial position on the winding package 4 (bobbin 13). When the winding package 4 (bobbin 13) is provided with the same peripheral speed at its different axial positions, this means that the winding package 4 (bobbin 13) is provided with different rotation speeds owing to its varying outer peripheral length. Where the winding package 4 (bobbin 13) has a stable shape, it is impossible that the rotation speed of the winding package 4 varies at different axial positions. Consequently, the rotating force of the traverse drum 10 is substantially transmitted to the winding package 4 (bobbin 13) only at one axial point (driving point P) on the winding package 4 (bobbin 13).
  • the driving point P serves as a balancing center position of the winding package 4 (bobbin 13) in contact with the traverse drum 10.
  • This balancing center position is determined by a position of the center of gravity of the winding package 4 (bobbin 13) and the magnitude of the supporting force exerted by the cradle arm that exerts to support the opposite axial ends of the bobbin 13.
  • the position of the center of gravity of the winding package 4 (bobbin 13) is displaced toward a larger diameter side in response to an increase in winding diameter resulting from the progress of winding of the yarn 3.
  • the driving point P moves toward the larger diameter side of the winding package 4 as the winding diameter of the winding package 4 increases, as shown by arrow A ( Figure 1 ).
  • the rotation speed of the traverse drum 10 which is set at a fixed value regardless of the varying winding diameter of the winding package 4.
  • the fixed rotation speed of the traverse drum 10 disadvantageously prevents the yarn speed from being fixed.
  • the winding unit 1 includes a yarn speed control mechanism 15 that is able to control the yarn speed at the fixed yarn speed.
  • the yarn speed control mechanism 15 will be described later.
  • a line (a) in Figure 2 shows the relationship between the peripheral speed and winding diameter of the traverse drum 10.
  • the peripheral speed Vd is shown by a thick solid line.
  • the peripheral speed Vd has a fixed value.
  • a line (b) in Figure 2 shows the relationship between the traveling speed (yarn speed) of the yarn 3 and the winding diameter.
  • the average value of the yarn speed (traverse average value described later) is shown by a thick broken line. Thin broken lines are used to show the upper limit and lower limit of yarn speed instantaneous value, which varies across the average value.
  • the yarn speed sensor 7 detects the yarn speed instantaneous value.
  • the axis of abscissa in Figure 2 is a magnitude axis indicating the winding diameter of the winding package 4.
  • the axis of ordinate in the figure 2 is a speed axis indicating the yarn speed or peripheral speed.
  • the line (a) in Figure 2 does not show the rotation speed of the traverse drum 10 but its peripheral speed because the yarn speed does not correspond to the rotation speed of the traverse drum 10 but to its peripheral speed. This will be described later in detail.
  • the peripheral speed of the traverse drum 10 is determined by the rotation speed of the traverse drum 10 and its diameter.
  • the winding diameter of the winding package 4 increases as the time elapses. Accordingly, the axis of abscissa in Figure 2 is generally a time axis.
  • the yarn speed is higher than the fixed peripheral speed of the traverse drum 10.
  • the yarn speed is lower than the peripheral speed of the traverse drum 10.
  • the yarn speed varies with the winding diameter of the winding package 4.
  • the yarn 3 is formed into the winding package 4 with a varying tension. This may degrade the package shape and yarn unwinding ability.
  • the allowable speeds of the devices (unwinding assisting device 5, variable tension device 6, and the like) arranged on the yarn route are limited. That is, the devices arranged on the yarn route need to be configured to withstand speeds higher than the average yarn speed from winding start to winding end. This is the problem resulting from an unfixed yarn speed.
  • the yarn speed is generally in proportion to the rotation speed of the winding package 4.
  • the yarn 3 is pulled to travel on the yarn route in the winding unit 1.
  • the only driving means for allowing the yarn 3 to travel is the traverse drum 10, which rotates the winding package 4.
  • the rotation speed of the traverse drum 10 is the fixed rotation speed
  • the rotation speed of the winding package 4 varies by the displacement of the driving point P as described above.
  • the rotation speed of the winding package 4 decreases as the driving point P is displaced toward the larger diameter side in response to an increase in winding diameter. The reason is as follows.
  • the peripheral speed of the traverse drum 10 is the fixed peripheral speed. Further, the traverse drum 10 is substantially in contact with the winding package 4 only at the driving point P.
  • the winding package 4 is provided with the fixed peripheral speed by the traverse drum 10 at the driving point P.
  • the driving point P moves toward the larger diameter side with the peripheral speed of the traverse drum 10 fixed
  • the outer peripheral length of the winding package 4 at the driving point P increases. This in turn increases the time required to cause the winding package 4 to make one rotation.
  • the displacement of the driving point P toward the larger diameter side reduces the rotation speed of the winding package 4.
  • the increase in winding diameter itself generally increases the outer peripheral length of the winding package 4.
  • the yarn speed instantaneous value is generally equal to the peripheral speed of the winding package 4 at the actual winding position of the yarn 3.
  • the peripheral speed of the winding package 4 varies depending on the axial position on the winding package 4. Further, since the yarn 3 is transversely wound into the winding package 4, the position where the yarn 3 is wound on the winding package 4 varies from moment to moment.
  • the yarn 3 is swung in the axial direction of the winding package 4. This varies the length of the route for the yarn 3, extending from the traverse drum 10 to the winding package 4, to expand or contract the yarn 3. This in turn causes the yarn speed instantaneous value to deviate from the peripheral speed of the winding package 4 at the winding position.
  • the above variation in yarn speed caused by traverse winding is negligibly small compared to a variation in yarn speed caused by the displaced driving point P.
  • the traverse average value of the yarn speed obtained by averaging instantaneous values over the traverse winding period may be considered a target to be affected by the varying winding diameter of the winding package 4.
  • the yarn speed means the traverse average value of the yarn speed, unless otherwise specified.
  • the yarn speed control mechanism 15 controls the yarn speed so that it follows a target value.
  • setting a fixed yarn speed target value enables the yarn speed to be controlled to the fixed value, regardless of the varying winding diameter in order to prevent a variation in yarn speed resulting from the varying winding diameter.
  • the yarn speed control mechanism 15 comprises the traverse drum 10, which allows the yarn 3 to travel, the drum driver 11, which rotationally drives the traverse drum 10, the sequencer 12 as a control device that controls the rotation speed of the traverse drum 10, and the yarn speed sensor 7, which detects the yarn speed instantaneous value.
  • the sequencer 12 calculates the traverse average value of the yarn speed from the yarn speed instantaneous value detected by the yarn speed sensor 7, and the sequencer 12 controls the rotational driving of the traverse drum 10 via the drum driver 11 so that the traverse average value is equal to a predetermined target value.
  • the drum driver 11 comprises a driving motor 11 a that rotationally drives the traverse drum 10 and an inverter 11 b that varies an output from the driving motor 11 a.
  • the sequencer 12 is a computer apparatus comprising an arithmetic device 12a that executes data processing on the basis of programs and a storage device 12b in which data and the programs are stored.
  • the sequencer 12 is connected to the yarn speed sensor 7 and drum driver 11 so that it can transmit signals to and from the yarn speed sensor 7 and drum driver 11 via an input/output device provided in the sequencer 12.
  • An output signal from the yarn speed sensor 7 corresponds to the yarn speed instantaneous value. Accordingly, the sequencer 12 calculates the traverse average value of the yarn speed.
  • Information on the rotation speed of the traverse drum 10, which also functions as traverse means, is stored in the storage device 12b of the sequencer 12 in a time series manner.
  • the arithmetic device 12a calculates the current traverse period from the rotation speed information.
  • the arithmetic device 12a then averages, over the traverse period, yarn speed instantaneous values transmitted by the yarn speed sensor 7 to calculate the traverse average value of the yarn speed.
  • the yarn speed sensor 7 and the sequencer 12 constitute yarn speed (traverse average value) detecting means.
  • the yarn speed sequencer 7 constitutes means for detecting the yarn speed instantaneous value.
  • the sequencer 12 constitutes speed averaging means for averaging yarn speed instantaneous values over the traverse period to calculate the traverse average value of the yarn speed.
  • the time width over which yarn speed instantaneous values are averaged is not limited to one traverse period.
  • the time width may be a constant multiple of the traverse period.
  • the yarn speed sensor 7 cannot be used to determine the yarn speed instantaneous value. This is because the time width required to detect the yarn speed varies depending on the yarn speed.
  • the magnitude of frequency, from which the yarn speed is determined varies depending on the yarn speed, and this varies the time required to detect the yarn speed.
  • the intervals of pulse transmissions, from which the yarn speed is determined varies depending on the yarn speed, and this varies the time required to detect the yarn speed.
  • the time width required to detect the yarn speed corresponds to the amount of time until a specified point on the yarn 3 passes by the yarn speed sensor 7. This time is thus much smaller than the traverse period. Accordingly, in connection with the traverse period, the yarn speed detected by the yarn speed sensor 7 can be considered to be its instantaneous value.
  • the sequencer 12 compares the yarn speed detected value with the yarn speed target value stored in the storage device 12b.
  • the yarn speed target value set at a specified value, is stored in the storage device 12b.
  • the target value can be changed via an input device for the sequencer 12.
  • the sequencer 12 controls the rotation speed of the traverse drum 10 so that the yarn speed detected value is equal to the yarn speed target value.
  • This rotation speed control is performed by changing or maintaining an instruction value for the rotation speed of the traverse drum 10 with respect to the last instruction value.
  • the sequencer 12 sets the instruction value for the rotation speed of the traverse drum 10 to be smaller than the last one so as to lower the rotation speed of the traverse drum 10. In contrast, when the yarn speed detected value is smaller than the yarn speed target value, the sequencer 12 sets the instruction value for the rotation speed of the traverse drum 10 to be larger than the last one so as to raise the rotation speed of the traverse drum 10. When the yarn speed detected value is equal to the yarn speed target value, the sequencer 12 sets the instruction value for the rotation speed of the traverse drum 10 to be the same as the last one so as to maintain the rotation speed of the traverse drum 10.
  • An encoder 16 that is a rotation speed detecting device is provided in the winding unit 1 to serve as means for obtaining the detected value of rotation speed of the traverse drum 10.
  • the detected value of the rotation speed of the traverse drum 10 obtained by the encoder 16 is transmitted to the sequencer 12.
  • the sequencer 12 determines whether or not the detected value of rotation speed of the traverse drum 10 is equal to the instruction value for the rotation speed of the traverse drum 10 to monitor whether or not the drum driver 11 operates improperly.
  • the detected value itself of rotation speed of the traverse drum 10 is not utilized for the sequencer 12 to control the yarn speed so that it follows the target value.
  • a line (a) in Figure 3 shows the relationship between the peripheral speed of the traverse drum 10 and the winding diameter.
  • the peripheral speed is shown by a thick solid line.
  • the peripheral speed is controlled to increase consistently with the winding diameter.
  • a line (b) in Figure 3 shows the relationship between the yarn speed and the winding diameter.
  • the average value V (traverse average value) of the yarn speed is shown by a thick broken line. Thin broken lines are used to show the upper limit and lower limit of yarn speed instantaneous value, which varies across the average value.
  • the yarn speed sensor 7 detects the yarn speed instantaneous value.
  • the axis of abscissa in Figure 3 is a magnitude axis indicating the winding diameter of the winding package 4.
  • the axis of ordinate in the figure 3 is a speed axis indicating the yarn speed or peripheral speed.
  • the peripheral speed (rotation speed) of the traverse drum 10 gradually increases as the line (a) in Figure 3 .
  • the peripheral speed is lower than the fixed yarn speed.
  • the peripheral speed is higher than the yarn speed.
  • a line (c) in Figure 3 shows a partial enlarged view of the line (a) in Figure 3 .
  • the peripheral speed of the traverse drum 10 generally increases gradually as the line (a) in Figure 3 while forming a step-like waveform as the line (c) in Figure 3 .
  • the sequencer 12 in the yarn speed control mechanism 15 changes the instruction value for the rotation speed of the traverse drum 10 at every traverse period T.
  • the setting (change or maintenance) of the instruction value for the rotation speed is based on the traverse average value of the yarn speed.
  • the setting follows timings for the calculation of the traverse average value of the yarn speed.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Winding Filamentary Materials (AREA)

Claims (2)

  1. Bobinoir conique comprenant:
    un tambour (10) qui tourne en contact avec un emballage conique (4) pour faire tourner concurremment l'emballage; et un organe d'entraînement de tambour (11) qui entraîne en rotation le tambour, le bobinoir étant caractérisé en comprenant en outre:
    un moyen de détection de vitesse de fil (7) pour détecter une vitesse de fil qui est une vitesse de déplacement d'un fil enroulé dans un emballage; et
    un dispositif de commande (15) qui commande l'organe d'entraînement du tambour en réglant une valeur d'instruction pour une vitesse de rotation du tambour de telle sorte qu'une valeur détectée de la vitesse du fil est égale à une valeur fixe prédéterminée.
  2. Bobinoir selon la revendication 1, caractérisé en ce que le tambour est un tambour traverse ayant une surface périphérique extérieure dans laquelle une rainure traverse est formée.
EP20060124374 2005-12-08 2006-11-20 Bobinoir Active EP1795477B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005355303A JP4712549B2 (ja) 2005-12-08 2005-12-08 ワインダー

Publications (2)

Publication Number Publication Date
EP1795477A1 EP1795477A1 (fr) 2007-06-13
EP1795477B1 true EP1795477B1 (fr) 2009-09-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060124374 Active EP1795477B1 (fr) 2005-12-08 2006-11-20 Bobinoir

Country Status (3)

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EP (1) EP1795477B1 (fr)
JP (1) JP4712549B2 (fr)
DE (1) DE602006009207D1 (fr)

Cited By (1)

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CN101509756B (zh) * 2008-02-14 2012-11-07 村田机械株式会社 纱线品质测量器以及绕线机

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DE102008019012A1 (de) * 2008-04-15 2009-10-22 Ferdinand Josef Prof. Dr. Hermanns Verfahren und Anordnung zur hochgenauen Bestimmung der momentanen Aufwickelgeschwindigkeit eines laufenden Fadens
JP2014040325A (ja) * 2012-07-27 2014-03-06 Murata Mach Ltd 駆動状態検出装置、巻取ユニット、巻取機、紡績ユニット及び紡績機
JP2019137480A (ja) * 2018-02-07 2019-08-22 村田機械株式会社 糸巻取機及び糸巻取方法

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EP1795477A1 (fr) 2007-06-13
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JP2007153608A (ja) 2007-06-21

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