EP1862573A1 - Vorrichtung zum Vermeiden von Operativfehlern für eine Webmaschine - Google Patents

Vorrichtung zum Vermeiden von Operativfehlern für eine Webmaschine Download PDF

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Publication number
EP1862573A1
EP1862573A1 EP07008338A EP07008338A EP1862573A1 EP 1862573 A1 EP1862573 A1 EP 1862573A1 EP 07008338 A EP07008338 A EP 07008338A EP 07008338 A EP07008338 A EP 07008338A EP 1862573 A1 EP1862573 A1 EP 1862573A1
Authority
EP
European Patent Office
Prior art keywords
loom
shedding
reverse
rotation
angle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07008338A
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English (en)
French (fr)
Other versions
EP1862573B1 (de
Inventor
Morikazu Yamazaki
Yutaka Shibu
Masato Fukami
Kenji Sakurada
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.)
Tsudakoma Corp
Original Assignee
Tsudakoma Industrial Co Ltd
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Publication date
Application filed by Tsudakoma Industrial Co Ltd filed Critical Tsudakoma Industrial Co Ltd
Publication of EP1862573A1 publication Critical patent/EP1862573A1/de
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Publication of EP1862573B1 publication Critical patent/EP1862573B1/de
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/002—Avoiding starting marks
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C19/00—Methods or devices concerned with designing or making patterns, not provided for in other groups of this subclass
    • D03C19/005—Electronic

Definitions

  • a loom equipped with a shedding device having a leveling function by prohibiting a reverse rotation even if the operator erroneously commands the loom to perform a reverse rotation.
  • a loom is a type in which a central closed-shed state is attained by rotating a loom main shaft in the reverse direction while outputting an inverted shedding pattern to be used in the subsequent step, which is obtained by inverting the current shedding pattern.
  • the range of the aforementioned cross timing serving as a set range for the aforementioned "set angle" includes a main-shaft angle at which the shed amount of warp threads due to the driven healds is several centimeters or less.
  • the main controller prohibits the reverse rotation of the loom main shaft if the main-shaft angle exceeds the reverse-rotation prohibition angle within the range in which the shedding device is driven on the basis of the inverted shedding pattern. Accordingly, this prevents quality impairment of woven cloth, such as formation of weft bars caused by a displaced cloth fell or a cloth breakage caused by a beating motion resulting from driving of the loom main shaft, namely, the warp shedding device, in response to an erroneous reverse-rotation command.
  • the reverse-rotation prohibition angle is set to an angle at which the quality impairment of woven cloth actually does not occur.
  • the reverse-rotation prohibition angle may be set to an angle preliminarily determined by the manufacturer in view of the above or may be adjustable by the user.
  • Fig. 1 is a block diagram showing the inside of a control device 10 for a loom and a warp shedding device 50 for generating a warp shedding motion.
  • the control device 10 functioning as a control system for the loom mainly includes a setting unit 12 for setting various weaving parameters and a main controller 14 for controlling the loom on the basis of the set parameters input to the setting unit 12 and other input data.
  • the main controller 14 is connected to a drive circuit 28 for driving a main-shaft motor 26, and to a drive circuit 32 for driving an electromagnetic brake 30. Furthermore, although not shown, the main controller 14 is also connected to a take-up control circuit for driving a take-up motor, a let-off control circuit for driving a let-off motor, and a weft-insertion controller for controlling weft insertion. These circuits are controlled on the basis of signals output from the main controller 14 via the output port 18.
  • the drive circuit 28 When the loom is in operation, the drive circuit 28 receives an ON output of the activation signal S5 (activation ON signal S5) from the main controller 14 and rotates the main-shaft motor 26 forward at high speed, thus maintaining the normal operational state of the loom.
  • the drive circuit 28 receives an ON output of the forward rotation signal S6 (forward rotation ON signal S6) and rotates the main-shaft motor 26 forward at low speed.
  • the drive circuit 28 receives an ON output of the reverse rotation signal S7 (reverse rotation ON signal S7) and rotates the main-shaft motor 26 in the reverse direction at low speed.
  • the shedding controller 56 preliminarily receives information related to each shedding step number set in the setting unit 12, the information including a drive mode of each heald frame (selection of up-and-down motion of the heald frame) and an output mode of selection signals used for switching weft threads in multicolor weft insertion or for changing the weft insertion density.
  • the received information is stored in a storage unit (not shown) included in the shedding controller 56.
  • the shedding controller 56 determines the rotating direction of the drive shaft 52, or in other words, the rotating direction of the loom main shaft 24, on the basis of the step signals S16 and S17 from the respective sensors 54 and 55.
  • the shedding controller 56 increments or decrements the shedding step number by one in accordance with the number of turns of the drive shaft 52, and updates the shedding pattern and the selection pattern in a one-by-one fashion. Based on the updated shedding pattern and selection pattern, the shedding controller 56 outputs a selection signal S18, which represents the drive mode of each of the heald frames to be driven in the subsequent shedding step, to the selection solenoids 57 provided as actuators for the respective heald frames through an electronic circuit (not shown).
  • the angular transition in the operational state that occurs in accordance with the rotation of the loom main shaft is shown in a time-series fashion towards the bottom of the page with the angle (timing) at which the weft-insertion error signal S10 is generated being located at the center.
  • the actual warp shedding pattern obtained when the leveling command S14 is input to the shedding controller 56 and the logical output state of the heald-frame pattern output by the shedding controller 56 for reverse rotation are shown at the bottom.
  • the cross timing for the shedding device is appropriately set by adjusting the connection phase between the main shaft 24 and the drive shaft 52, and is adequately adjusted within the range of ⁇ several tens of degrees in terms of the main-shaft angle depending on the weaving specification.
  • the cross timing for the shedding device is set at 300°.
  • a period in which the signal of the solenoid-selection shedding pattern is output corresponds to a predetermined period in which a shedding motion in a certain cycle is changed to a shedding motion in the subsequent cycle, that is, a range of a main-shaft angle that corresponds to the maximum shed amount by the shedding device.
  • the shedding controller 56 determines a rotating direction of the drive shaft 52 when the activation signal S5, the forward rotation signal S6, or the reverse rotation signal S7 from the main controller 14 is turned on, and selectively outputs the reversal-prohibiting signal S15a or S15b in synchronization with the step signal S16 or S17 depending on the determined rotating direction. More specifically, when the rotating direction is forward, only the reversal-prohibiting signal S15b that prohibits reversal from forward rotation to reverse rotation is output in synchronization with the step signal S17. On the other hand, when the rotating direction is reverse, only the reversal-prohibiting signal S15a that prohibits reversal from reverse rotation to forward rotation is output in synchronization with the step signal S16.
  • Fig. 3A shows an example of the setting state of a normal shedding pattern for weaving using five heald frames H1, H2, ..., H5.
  • the spaces with "x" show that the heald frames are at the upper position, whereas the blank spaces show that the heald frames are at the lower position.
  • the shedding step number changes from "1" to "5" in the vertical direction, or in other words, as the shedding pattern changes from "1" to "5", one heald frame is at the upper position whereas the remaining heald frames are at the lower position.
  • the main controller 14 executes the leveling function by outputting the leveling command S14 to the shedding controller 56 at an angle prior to the cross timing by one-half turn (180°) in terms of the main-shaft angle. Consequently, the shedding pattern obtained by inverting the current shedding pattern is input to the selection solenoids 57.
  • the main controller 14 turns off the brake signal S8 and turns on the reverse rotation signal S7 so that the loom main shaft is rotated in the reverse direction at low speed.
  • the main controller 14 turns off the leveling command S14 and stops the main shaft 24.
  • a motion converting mechanism (not shown) connected to the main shaft 24 converts the rotation of the main shaft 24 into a rocking motion for the reed 64 so that the reed 64 is driven in a beating motion.
  • the warp threads 61 are transferred from the left to the right of the figure.
  • the operator operates the inching button 42 to rotate the main shaft 24 forward at low speed so that the warp shed is changed back to an open-shed state, based on the normal shedding pattern, from the central closed-shed state, based on the aforementioned inverted pattern.
  • the angle at which the manual forward rotation is stopped may be a timing at which the driving of the heald frames is to be started on the basis of the normal shedding pattern.
  • the main controller 14 may continuously output the forward rotation signal S6 to rotate the main shaft 24 forward at low speed until the main shaft 24 leaves the reversal prohibition period of the electronic dobby device (specifically, until the main-shaft angle exceeds 210° at which the step signal S15 output in synchronization with the step signal S16 is turned off).
  • Fig. 4 is a flowchart of the process executed by the main controller 14 in response to input of an operation-button signal when the loom is in a stopped state.
  • the main controller 14 determines the input conditions of the plurality of operation-button signals, and the process proceeds from the current step to a subsequent step that corresponds to the determined result of the operation signals.
  • the main controller 14 receives the reverse operation signal S3 in an ON state, whereby the process proceeds to step ST003.
  • step ST003 the main controller 14 determines whether the leveling function is set in an operative or inoperative mode. The process then proceeds from step ST003 to a subsequent step that corresponds to the determined result.
  • the operative/inoperative information of the leveling function is set in the setting unit 12 prior to the continuous operation of the loom, such as during a looming operation. For example, when the leveling function is set in the operative mode, if the loom is to be set on standby after an occurrence of a cause of stoppage, the main controller 14 will output the leveling command S14 so that the driving is implemented on the basis of an inverted shedding pattern as shown in Figs. 2 and 5, thereby setting the warp shed to the central closed-shed state. On the other hand, if the leveling function is set in the inoperative mode, the main controller 14 will not output the leveling command S14, which means that the driving is implemented on the basis of the normal shedding pattern.
  • step ST003 the determination steps to be described below will be skipped so that the process proceeds directly to step ST006 where the loom is controlled on the basis of a manual reverse rotation mode as a control mode of the loom.
  • step ST004 the leveling function is determined to be operative in step ST003 (that is, if the determination result is "YES"), the process proceeds to step ST004.
  • step ST004 the main controller 14 determines whether or not the warp heald frames are currently driven on the basis of an inverted shedding pattern (reverse-rotation frame pattern) generated for central leveling.
  • the main controller 14 is capable of controlling the overall operation of the loom from the point of occurrence of the cause of stoppage to the point of reactivation of the loom.
  • the main controller 14 also receives the main-shaft angle signal ⁇ and the signals S15a and S15b from the shedding device. More specifically, the signals S15a and S15b are called a forward-rotation prohibition signal and a reverse-rotation prohibition signal, respectively, and are output regardless of whether or not a leveling function is provided as in the present invention.
  • the signals S15a and S15b are output in accordance with the rotating direction of the drive shaft 52. More specifically, when the shedding controller 56 receives the activation signal S5 or the forward rotation signal S6, the shedding controller 56 turns off the signal S15a serving as the forward-rotation prohibition signal and outputs the signal S15b serving as the reverse-rotation prohibition signal in synchronization with input of the step signal S17. On the other hand, when the shedding controller 56 receives the reverse rotation signal S7, the shedding controller 56 turns off the signal S15b serving as the reverse-rotation prohibition signal and outputs the signal S15a serving as the forward-rotation prohibition signal in synchronization with input of the step signal S16.
  • the drive shaft of the shedding device can be rotated forward to switch the signal S15a from on to off, so that the count value for the number of outputs can be decremented by one.
  • the internal process flag A is set to an OFF state. This process can be implemented by the main controller 14 as a control routine.
  • step ST004 the main controller 14 determines whether or not the drive mode is based on the inverted shedding pattern in accordance with the set state of the internal process flag A. If the internal process flag A is on, it is determined that the drive mode is based on the inverted pattern, and the process proceeds to the next step (step ST005).
  • step ST005 the main controller 14 determines whether or not the current main-shaft angle ⁇ has reached the reverse-rotation prohibition angle preliminarily set in the setting unit 12. If the current main-shaft angle ⁇ has not reached the reverse-rotation prohibition angle, the process proceeds to step ST006 where the loom is driven on the basis of a manual reverse-rotation mode as the control mode of the loom. On the other hand, if the current main-shaft angle ⁇ has reached the reverse-rotation prohibition angle, the process proceeds to step ST007 where the control mode of the loom is set to a stop mode.
  • step ST002 if signals excluding the reverse operation signal S3, namely, the activation operation signal S1, the inching operation signal S2, and the stop operation signal S4, are received by the main controller 14, the process proceeds to step STOXX, which is not described in detail.
  • step STOXX a necessary determination process and switching process of the control mode are performed, and the corresponding signal is output so that the loom is driven in accordance with the corresponding operation button.
  • the control mode of the loom is set to the stop mode.
  • the brake signal S8 is turned on so that the loom is stopped.
  • step ST004 the process proceeds through steps ST004 and ST005 so that the low-speed reverse rotation is continuously executed.
  • the process proceeds to step ST007 where the loom is automatically stopped at the reverse-rotation prohibition angle.
  • the preliminarily set reverse-rotation prohibition angle may be set by means of the setting unit 12, or may be determined automatically when, for example, the cross timing of the shedding device is set, or may be set to a value preliminarily determined by the manufacturer.
  • the present embodiment is based on the assumption that the reverse-rotation prohibition angle is set by means of the setting unit 12 and is preliminarily set to 280° included within the range of several tens of degrees with respect to 300° which is the angle that corresponds to the cross timing of the shedding device.
  • the operator can implement the reverse-rotating operation so as to repair a defectively inserted weft thread or a broken thread, and can then reactivate the loom. Accordingly, preventing these operational errors can properly solve serious problems that can affect the quality of the woven cloth, such as weft bars and cloth breakages.
  • the reverse-rotation prohibition angle used in the above-described manner may be arbitrarily determined within a range in which the angle does not cause serious defects in the woven cloth.
  • two set ranges for the reverse-rotation prohibition angle are indicated by circled letters "a” and "b" below the horizontal axis (the main-shaft angle) in Fig. 2.
  • the set range indicated by “a” specifically shows a range in which the shedding device is driven on the basis of an inverted shedding pattern.
  • the blank circles indicate that the main-shaft angle at which the shed amount of warp threads is at the maximum is not included within the set range "a".
  • the reverse-rotation prohibition angle may be set to 300°, which is the set angle for the cross timing.
  • the reverse-rotation prohibition angle may be set to an angle, such as 320°, which is subsequent to the aforementioned cross timing.
  • step ST005 of the process shown in Fig. 4 will always be "YES”.
  • the process proceeds to step ST007 where the control mode of the loom is set to the stop mode, thereby prohibiting the reverse rotation.
  • the condition for setting the loom on standby with the warp shed in the central closed-shed state is not limited to the above.
  • the present invention is similarly applicable to a case where an additional manual leveling button is provided, such that when the manual leveling button is operated, the loom main shaft is automatically rotated in the reverse direction and an inverted shedding pattern is output from the shedding controller, thereby achieving the central closed-shed state.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP07008338A 2006-06-02 2007-04-24 Vorrichtung zum Vermeiden von Operativfehlern für eine Webmaschine Not-in-force EP1862573B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006155376A JP5084179B2 (ja) 2006-06-02 2006-06-02 織機の誤操作防止装置

Publications (2)

Publication Number Publication Date
EP1862573A1 true EP1862573A1 (de) 2007-12-05
EP1862573B1 EP1862573B1 (de) 2009-08-19

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EP07008338A Not-in-force EP1862573B1 (de) 2006-06-02 2007-04-24 Vorrichtung zum Vermeiden von Operativfehlern für eine Webmaschine

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EP (1) EP1862573B1 (de)
JP (1) JP5084179B2 (de)
CN (1) CN101082148B (de)
DE (1) DE602007002007D1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7159063B2 (ja) * 2019-01-22 2022-10-24 津田駒工業株式会社 パイル織機における起動制限方法及び装置
CN109972258B (zh) * 2019-04-25 2021-08-24 山东日发纺织机械有限公司 一种织机开口装置的控制方法
CN115478348A (zh) * 2022-09-13 2022-12-16 苏州汇川控制技术有限公司 织机控制方法、装置、设备及计算机可读存储介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01266241A (ja) * 1988-04-13 1989-10-24 Toyota Autom Loom Works Ltd 織機における織段発生防止方法
JPH03113052A (ja) * 1989-09-22 1991-05-14 Tsudakoma Corp 織機の寸動制御方法
JPH06116841A (ja) * 1992-10-02 1994-04-26 Tsudakoma Corp 織機の起動方法
EP0839939A1 (de) * 1996-10-29 1998-05-06 Tsudakoma Kogyo Kabushiki Kaisha Verfahren zur Steuerung des Wiederanlaufs einer Webmaschine
EP1637636A2 (de) * 2004-09-17 2006-03-22 Tsudakoma Kogyo Kabushiki Kaisha Vorrichtung zur Bestimmung eines Sollwerts

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004052148A (ja) * 2002-07-19 2004-02-19 Tsudakoma Corp 織機の誤運転防止装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01266241A (ja) * 1988-04-13 1989-10-24 Toyota Autom Loom Works Ltd 織機における織段発生防止方法
JPH03113052A (ja) * 1989-09-22 1991-05-14 Tsudakoma Corp 織機の寸動制御方法
JPH06116841A (ja) * 1992-10-02 1994-04-26 Tsudakoma Corp 織機の起動方法
EP0839939A1 (de) * 1996-10-29 1998-05-06 Tsudakoma Kogyo Kabushiki Kaisha Verfahren zur Steuerung des Wiederanlaufs einer Webmaschine
EP1637636A2 (de) * 2004-09-17 2006-03-22 Tsudakoma Kogyo Kabushiki Kaisha Vorrichtung zur Bestimmung eines Sollwerts

Also Published As

Publication number Publication date
EP1862573B1 (de) 2009-08-19
DE602007002007D1 (de) 2009-10-01
CN101082148A (zh) 2007-12-05
JP2007321313A (ja) 2007-12-13
CN101082148B (zh) 2011-01-26
JP5084179B2 (ja) 2012-11-28

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