EP3205758B1 - Method for preparing restart of loom - Google Patents

Method for preparing restart of loom Download PDF

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Publication number
EP3205758B1
EP3205758B1 EP17155161.7A EP17155161A EP3205758B1 EP 3205758 B1 EP3205758 B1 EP 3205758B1 EP 17155161 A EP17155161 A EP 17155161A EP 3205758 B1 EP3205758 B1 EP 3205758B1
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EP
European Patent Office
Prior art keywords
loom
main shaft
state
pick
warp
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Application number
EP17155161.7A
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German (de)
English (en)
French (fr)
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EP3205758A3 (en
EP3205758A2 (en
Inventor
Masao Yamane
Yutaka Shibu
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Tsudakoma Corp
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Tsudakoma Industrial Co Ltd
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Publication of EP3205758A2 publication Critical patent/EP3205758A2/en
Publication of EP3205758A3 publication Critical patent/EP3205758A3/en
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Publication of EP3205758B1 publication Critical patent/EP3205758B1/en
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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
    • D03D51/18—Automatic stop motions
    • D03D51/44—Automatic stop motions acting on defective operation of loom mechanisms
    • 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
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/06—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping
    • D03D51/08—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping stopping at definite point in weaving cycle, or moving to such point after stopping

Definitions

  • the present invention relates to a method for preparing a restart of a loom including a main shaft and a warp shedding device, the warp shedding device being driven by the main shaft so as to move following a rotation of the main shaft, the warp shedding device having a leveling function with which it brings warps in a leveled state by reversing the main shaft, the loom allowing an operator to remove a defective weft pick at the occurrence of a weft insertion defect.
  • the loom At the occurrence of a weft insertion defect, which is a cause of stoppage of a loom, the loom is stopped to perform a correcting operation, such as a removal of a defective weft pick causing the weft insertion defect. After the correcting operation is finished, the loom performs a predetermined operation for restart (start-up operation) and is then restarted.
  • a correcting operation such as a removal of a defective weft pick causing the weft insertion defect.
  • a loom that does not include an (automatic) weft removal device, which automatically removes the defective weft pick that is, a loom that requires an operator to remove a defective weft pick enters a stand-by state after bringing warps into a leveled state (state where all the warps are aligned at the same level) after the loom is stopped first due to the occurrence of the weft insertion defect.
  • a warp shedding device of the loom that provides shedding motion to the warps has a leveling function with which it brings the warps into the leveled state.
  • the warp shedding device of the loom is driven to bring the warps into the leveled state following a reverse operation after the first stop.
  • the loom is stopped (second stop) again and enters the stand-by state.
  • the operator When an operator is to perform a correcting operation, firstly, the operator releases the leveled warps. Then, the operator reverses the loom and performs an operation for a so-called pick finding, in which a defective weft pick is exposed through the cloth fell. The operator manually removes the defective weft pick in the state where the pick is found (or in the pick-found state). As needed in some cases, an operator similarly removes a weft pick inserted in front of the defective weft pick. After the operation of removing a defective weft pick and the like is finished, the loom is restarted following the above-described predetermined start-up operation.
  • Japanese Unexamined Patent Application Publication No. 06-116841 discloses an operation (method) for preparing a restart of such a loom from the first stop.
  • Japanese Unexamined Patent Application Publication No. 06-116841 discloses an operation for preparing a restart of the loom including an electronic dobby shedding device as a warp shedding device.
  • Japanese Unexamined Patent Application Publication No. 06-116841 when an operator performs the correcting operation of the loom including an electronic dobby shedding device while the loom is in the stand-by state, the operator firstly rotates the loom forward by one rotation of the main shaft. Then, the operator releases the leveled warps following the forward rotation of the loom. The operator then reverses the loom for the pick finding.
  • the above-described weft insertion defect occurs in the loom concurrently with a warp breakage.
  • a warp becomes slack as a result of an occurrence of a warp breakage and a weft pick inserted into the warp shed then comes into contact with the slack warp and causes a weft insertion defect.
  • a warp breakage and a weft insertion defect concurrently occur in the loom and the loom is stopped due to these two causes of stoppage.
  • a cloth fell of the woven cloth is beaten plural times by the loom in a non-weaving state as a result of reversing to bring the warps into the leveled state from the first stop, rotating forward to release the leveled warps, and reversing for the pick finding.
  • a woven cloth that is being woven is more likely to have a weaving bar (stop bar). It is thus conceivable, as a measure to prevent an occurrence of such a stop bar, to set the loom so that the leveling function is disabled (turned off) while the loom is stopped due to a weft insertion defect.
  • correction of a warp breakage involving finding of a broken warp or correction of the broken warp, is performed easily in the conditions where the warps are aligned on the same plane. When the warps are not aligned (in the shed state), finding of a broken warp is difficult and the broken warp is difficult to correct by being hindered by other warps.
  • the loom While the loom is stopped due to a weft insertion defect, the loom may be required to be left in the stand-by state, for some reason, without being immediately restarted after a correcting operation for removing a defective weft pick is performed.
  • the warps While the loom is in the stand-by state, here, the warps are preferably in the leveled state. However, the warps are failed to be leveled in the case where the leveling function is disabled. To address this, the setting of the leveling function is conceivably changed to bring the warps into the leveled state after the correcting operation for removing the defective weft pick is finished and the setting is changed (returned) again before the restart to disable the leveling function. Such operations are, however, troublesome. Besides, an operator may fail to return the setting and may restart the loom while the leveling function remains enabled.
  • European Patent Application No. 1 798 321 A2 discloses another method for preparing a restart of a loom.
  • An example of the present invention may include reversing the main shaft from an initial stop time point, after the loom is stopped due to causes of stoppage that are an occurrence of a warp breakage and an occurrence of a weft insertion defect accompanied with the warp breakage, while the leveling function of the warp shedding device is disabled to bring the loom into a stand-by state in a weaving cycle in which the cause or causes of stoppage have occurred, reversing the main shaft in response to an operator operating a reverse button while the loom is in the stand-by state to bring the loom into a pick-found state, in which the defective weft pick is pickfound, and allowing the operator to remove the defective weft pick in the pick-found state, and reversing the main shaft in response to the operator operating a button after a removal of the defective weft pick while the leveling function of
  • the method for preparing a restart of a loom according to the present invention may include outputting a leveling command in response to the operator operating the reverse button when reversing the main shaft.
  • the loom while the loom is stopped due to causes of stoppage that are an occurrence of a warp breakage and an occurrence of a weft insertion defect accompanied with the warp breakage, the loom is reversed to an angle at which the loom is in a stand-by state from an initial stop time point, that is, a first stop time point after an idling rotation of the loom subsequent to the generation of a stop command signal (so-called a first stop time point), after the leveling function of the warp shedding device is disabled.
  • a first stop time point after an idling rotation of the loom subsequent to the generation of a stop command signal (so-called a first stop time point)
  • the operation of the loom for pick finding of a defective weft pick from the stand-by state only requires a reverse rotation without the need of releasing the leveled warps.
  • the warps are brought into the leveled state after the correcting operation of the weft insertion defect (operation of removing a defective weft pick) is performed.
  • a correcting operation of the broken warp can be easily performed.
  • Fig. 1 schematically illustrates the entire configuration of a loom 1 to which the invention is applied.
  • a large number of warps T are fed, while being in a sheet form, from a warp beam 3 to a cloth fell CF of a fabric W via a back roller 4 and then passing multiple healds 5 and a reed 6.
  • the warp beam 3 that feeds the warps T is driven by a let-off motor M2.
  • the let-off motor M2 is driven while being controlled so that the warps T are fed from the warp beam 3 at a predetermined tension, determined on the basis of parameters such as the rotation speed of a main shaft 2, a predetermined weft density of the woven cloth W, and the detected tension of the warps T.
  • the main shaft 2 is driven by a main motor MM to rotate at a predetermined rotation speed.
  • Each heald 5 through which a warp T is inserted is supported by a corresponding one of heald frames 7.
  • Each heald frame 7 is driven to reciprocate vertically by a warp shedding device.
  • a weft pick Y is inserted by a weft insertion mechanism (not illustrated). Concurrently, the weft pick Y is beaten by the reed 6 up to the cloth fell CF, so that a woven cloth W is formed.
  • the woven cloth W is guided to a cloth roller 13 via a guide roller 9, a take-up roller 11, and press rollers 12 and wound around the cloth roller 13.
  • the woven cloth W is pulled as a result of the take-up roller 11 being driven to rotate and woven at a weft density corresponding to the speed of let-off in response to the pulling.
  • the take-up roller 11 is driven by a take-up motor M1.
  • the take-up motor M1 is controlled so as to drive the take-up roller 11 so that the weft density of the woven cloth W, which is being woven, coincides with the predetermined weft density on the basis of the rotation speed of the main shaft 2 and the predetermined weft density of the woven cloth W.
  • Fig. 2 is a block diagram of a control structure of the loom 1.
  • the loom 1 includes a main control device 21.
  • the main control device 21 includes a storage unit 21a.
  • the storage unit 21a stores various weaving conditions including a predetermined rotation speed of the main shaft 2, a predetermined weft density of the woven cloth W, and a predetermined tension of the warps T.
  • the main control device 21 is connected to a main shaft controlling unit 25, which controls driving of the main motor MM, a let-off control device 27, which controls driving of a let-off motor M2, and a take-up control device 29, which controls driving of the take-up motor M1.
  • a warp shedding device that provides shedding motion to each heald frame 7 (heald 5) is an electronic dobby shedding device (herein after also simply referred to as "a dobby shedding device") 23.
  • the dobby shedding device is a shedding device that drives the heald frames so that the vertical position of each heald frame (vertical position at the maximum shedding of the warps T) in each loom weaving cycle is positioned at the position determined in the shedding pattern by switching the driving state of the driving mechanism, provided for each heald frame, in accordance with a predetermined shedding pattern.
  • the weaving cycle is a unit of a weaving motion repeated for each rotation of the main shaft 2.
  • One weaving cycle corresponds to a rotation angle of the main shaft 2 (hereinafter also referred to as "a crank angle") from 0° to 360° (to the next crank angle 0°).
  • the shedding pattern is determined as one repetition of a weave structure on the basis of the vertical position of the heald frames for each weaving cycle.
  • a selection pattern, described below, is the state of the vertical position of each heald frame determined for each weaving cycle.
  • the dobby shedding device 23 includes a dobby controlling device 23a, in which a shedding pattern for forming an intended weave structure of the woven cloth W is set, and a shedding driving unit 23b, which includes multiple driving mechanisms (not illustrated) each including components such as a solenoid, a swing lever, and a selection lever, the driving mechanisms being disposed so as to correspond to the heald frames 7.
  • the dobby shedding device 23 is connected to the main control device 21 at the dobby controlling device 23a.
  • each driving mechanism included in the shedding driving unit 23b includes a swing lever, connected to the main shaft 2 and driven to swing by a rotation of the main shaft 2.
  • the swing of the swing lever changes the vertical position of the corresponding heald frame 7.
  • the dobby shedding device 23 is driven by the main shaft 2 to drive the heald frames 7 and driven so as to move following a rotation of the main shaft 2.
  • each of the driving mechanism of the shedding driving unit 23b is connected to the corresponding heald frame 7 with a publicly known driving transfer mechanism (not illustrated) interposed therebetween.
  • each heald frame 7 is positioned at a shedding position (the vertical position) determined in the shedding pattern in each weaving cycle as a result of a solenoid select command being given per weaving cycle in accordance with the selection pattern for the weaving cycle in a shedding pattern determined in the dobby controlling device 23a on the basis of the shedding pattern and then bringing the solenoid of each driving mechanism in the shedding driving unit 23b into an excited state in response to the given select command.
  • the select command is given approximately one cycle prior to the weaving cycle determined in the shedding pattern in relation to the driving mechanism ( Fig. 3 ).
  • the loom 1 also includes, as typical loom components, a weft detection feeler 8, which detects a weft pick Y inserted in the manner described above, and a warp breakage sensor 10, which detects a breakage of warps T (warp breakage).
  • the weft detection feeler 8 and the warp breakage sensor 10 are connected to the main control device 21.
  • the main control device 21 determines whether a weft insertion has succeeded or failed on the basis of a weft detection signal Sy input from the weft detection feeler 8 per weft insertion in each weaving cycle.
  • the main control device 21 When the main control device 21 detects a weft insertion defect, in which a weft insertion is failed, the main control device 21 outputs a stop command signal Ss to the main shaft controlling unit 25. Similarly, when the main control device 21 detects a warp breakage, the main control device 21 outputs a stop command signal Ss to the main shaft controlling unit 25 in response to an input of a warp breakage detection signal St generated by the warp breakage sensor 10 at a detecting of a warp breakage.
  • the main shaft controlling unit 25 operates a braking device (not illustrated), which damps the main shaft 2, to stop the rotation of the main shaft 2 in response to the input of the stop command signal Ss and implements a stop control to stop the main motor MM.
  • a braking device not illustrated
  • the main shaft controlling unit 25 starts an operation of stopping the loom 1 in response to the generation of the stop command signal Ss
  • the loom 1 is left in the stationary state after passing a braking period, in which the main shaft 2 idly rotates approximately one rotation.
  • the loom 1 is in a weft insertion prohibited state, in which a weft insertion is not performed even when the crank angle arrives at a weft insertion start angle.
  • the loom 1 also includes an operation button, operated to activate the loom 1 in the stationary state, a stop button operated to stop the loom 1 in a continuous operation, a jogging button 15a, operated to slightly rotate forward the main shaft 2 of the loom 1 in the stationary state, and a reverse button 15b, operated to reverse the main shaft 2 of the loom 1 in the stationary state at low speed.
  • the loom 1 includes an input setting device 17 including a display screen (such as a touch display screen).
  • the operation button, the stop button, the jogging button 15a, and the reverse button 15b are disposed on the input setting device 17 in the form of, for example, being displayed on the display screen.
  • the input setting device 17 here is used to set the above-described weaving conditions and capable of displaying information of the loom 1 such as operation information or stoppage information.
  • the cause of stoppage is displayed on the display screen of the input setting device 17 to notify the operator of the cause of stoppage.
  • the warp breakage sensor 10 outputs a warp breakage detection signal St to the main control device 21 and the main control device 21 detects the occurrence of a warp breakage.
  • the main control device 21 detects the occurrence of the weft insertion defect on the basis of a weft detection signal Sy from the weft detection feeler 8.
  • the main control device 21 causes the input setting device 17 to display these causes of stoppage.
  • the operator can be notified of the causes of stoppage.
  • the main control device 21 When a weft insertion defect occurs during weaving in the above-described loom 1, the main control device 21 outputs the above-described stop command signal Ss at a predetermined time point (for example, at the crank angle of 290°) after the completion of the weft insertion period determined in the weaving cycle in which the weft insertion defect has occurred, as illustrated in Fig. 3 .
  • the main shaft controlling unit 25 performs the stop control, so that the loom 1 is brought into a temporary initial stop (first stop) state at the crank angle (for example at 300°) passing the braking period of approximately one rotation of the main shaft 2 from the time point at which the stop command signal Ss is generated.
  • the loom 1, in the first stop state, is then subjected to operations such as a reverse operation for removal of a defective weft pick causing the weft insertion defect.
  • the present invention is designed for a loom that does not include a weft removal device, which automatically removes (pulls out) a defective weft pick, that is, designed for a loom that requires an operator to remove a defective weft pick when a weft insertion defect occurs.
  • the loom 1 according to the embodiment does not include such a weft removal device, either. The loom 1 is thus left in the stand-by state by the time when an operator arrives to remove a defective weft pick.
  • the loom 1 in the first stop state thus automatically performs a reverse operation, in which the loom 1 reverses by approximately one rotation of the main shaft 2.
  • the loom 1 then stops (second stop) at, for example, the crank angle of approximately 300° in the previous weaving cycle (weaving cycle in which the weft insertion defect (cause of stoppage) occurs), which precedes the weaving cycle in which the loom has the first stop, and the loom 1 is left in the stand-by state, in which the loom 1 is left waiting for the arrival of the operator.
  • the warp beam 3 (let-off motor M2) and the take-up roller 11 (take-up motor M1) are driven in synchronization with the main shaft 2 (main motor MM) during weaving.
  • the warp beam 3 (let-off motor M2) and the take-up roller 11 (take-up motor M1) are driven to reverse (or rotate forward) by the amount corresponding to the reverse amount (or forward rotation amount) of the main shaft 2 (main motor MM) in synchronization with the main shaft 2 (main motor MM).
  • the warp breakage is usually corrected by an operator.
  • the loom 1 in the first stop state automatically performs a reverse operation and enters the stand-by state at the crank angle for the second stop.
  • the dobby controlling device 23a of the dobby shedding device 23 When the dobby shedding device 23 drives the heald frames 7 in accordance with the selection pattern for weaving during the reverse operation (hereinafter also referred to as "a first reverse") in which the loom 1 reverses from the crank angle for the first stop to the crank angle for the second stop, the dobby controlling device 23a of the dobby shedding device 23 generates a select command of the form illustrated in the middle one of the layers in Fig. 3 .
  • a typical dobby shedding device has a leveling function with which it brings warps into the leveled state in accordance with reverse of the main shaft, which drives the loom, after the loom is changed from the stationary state.
  • a typical dobby shedding device has a function of causing a dobby control device to generate a so-called reverse-pattern-based select command, obtained by reversing the selection pattern corresponding to the weaving cycle in which the loom is stopped, when the dobby shedding device is changed from the stationary state to the state where the main shaft, driving the dobby shedding device, is reversed, as illustrated in the bottom layer in Fig. 3 .
  • the function of the dobby shedding device with which it causes generation of the reverse-pattern-based select command is a leveling function of the dobby shedding device.
  • the leveling function is enabled as a result of a leveling command being output to the dobby controlling device (in the state where the reverse-pattern-based select command is generated).
  • whether the leveling function of the dobby shedding device 23 is to be enabled or disabled during the first reverse can be differently set depending on each cause of stoppage (weft insertion defect, a warp breakage, and others) by the input setting device 17.
  • the main control device 21 outputs a leveling command Lc at the time of the first stop in accordance with the different setting.
  • the warps are brought into the leveled state while the loom is in the stand-by state at the crank angle for the second stop.
  • the setting in the input setting device 17 indicates that the leveling function is enabled for the case where the cause of stoppage is a warp breakage.
  • the main control device 21 outputs a leveling command Lc to the dobby controlling device 23a at the first stop in response to an input of the warp breakage detection signal St from the warp breakage sensor 10.
  • the reverse-pattern-based select command is generated by the dobby controlling device 23a at the first reverse, so that the warps T are brought into the leveled state while the loom 1 is in the stand-by state at the crank angle for the second stop.
  • the dobby shedding device is controlled at the first reverse in the same manner as in the case of the occurrence of a warp breakage, such that the warps are brought into the leveled state while the loom is in the stand-by state.
  • an existing loom is subjected to a reverse operation by reversing the main shaft while the leveling function of the dobby shedding device is enabled.
  • causes of stoppage include a weft insertion defect
  • the reverse operation (the first reverse) of the loom 1 from the crank angle for the first stop to the crank angle (the stand-by state) for the second stop is performed while the leveling function of the dobby shedding device is disabled.
  • the warps are brought into the leveled state after a correcting operation (a defective-weft-pick removal operation) involving a removal of a defective weft pick is performed.
  • a correcting operation a defective-weft-pick removal operation
  • the present invention is described, according to which a warp breakage and a weft insertion defect concurrently occur in the loom 1 such that the causes of stoppage include a weft insertion defect (see Fig. 4 ).
  • a warp breakage occurs in the loom 1 during weaving (while the loom 1 is in operation)
  • a warp breakage is detected by the warp breakage sensor 10 and the warp breakage sensor 10 outputs a warp breakage detection signal St to the main control device 21.
  • the main control device 21 detects the occurrence of a warp breakage.
  • the main control device 21 detects the occurrence of the weft insertion defect on the basis of a weft detection signal Sy output from the weft detection feeler 8 to the main control device 21 for each weft insertion.
  • the main control device 21 On the basis of the detection of the occurrences of the warp breakage and the weft insertion defect, the main control device 21 outputs a stop command signal Ss to the main shaft controlling unit 25 at a predetermined time point (for example, at the crank angle of 290°) in the weaving cycle in which the warp breakage and the weft insertion defect have occurred. In response to the detection of the occurrences of the warp breakage and the weft insertion defect, the main control device 21 outputs a display command for displaying the causes of stoppage to the input setting device 17. Thus, the causes of stoppage are displayed on the display screen of the input setting device 17.
  • the main shaft controlling unit 25 performs a stop operation of the loom 1 (main shaft 2), described above.
  • the loom 1 is brought into the first stop state at an intended stop angle (for example, at the crank angle of 300°) in the subsequent weaving cycle following the weaving cycle in which the causes of stoppage occur (hereinafter this weaving cycle is also referred to as "an event cycle").
  • the main control device 21 outputs a reverse command to the main shaft controlling unit 25 to reverse the main shaft 2 to the crank angle for the second stop (for example, at the crank angle of 300° in the event cycle) at which the loom is in the stand-by state.
  • the reverse operation of the loom 1 is performed by reversing the main shaft 2 and the loom 1 enters the stand-by state in which it is left waiting for arrival of an operator.
  • the first reverse to the crank angle for the second stop is performed in the state where the leveling function of the dobby shedding device 23 is disabled.
  • the leveling function is disabled when a warp breakage and a weft insertion defect concurrently occur.
  • the reverse operation of the loom 1 back to the event cycle is performed so that the vertical position of each heald frame 7 in the event cycle is positioned in accordance with the selection pattern for weaving.
  • the operator performs a defective-weft-pick removal operation, in which he/she removes a defective weft pick from the woven cloth W.
  • the operator operates the reverse button 15b to cause the loom 1 to perform the reverse operation so that a defective weft pick is exposed from the cloth fell CF (the pick is found).
  • the loom 1 performs the reverse operation (second reverse) in which the main shaft 2 is reversed.
  • the main control device 21 In response to the operation on the reverse button 15b while the loom 1 according to the embodiment is in the stand-by state, the main control device 21 outputs a leveling command Lc to the dobby controlling device 23a of the dobby shedding device 23. In other words, when a warp breakage and a weft insertion defect are concurrently detected, the main control device 21 outputs a leveling command to the dobby controlling device 23a in response to the operation on the reverse button 15b firstly performed after the second stop.
  • a leveling command Lc is output from the main control device 21 to the dobby controlling device 23a.
  • the leveling function of the dobby controlling device 23a is enabled and a reverse-pattern-based select command is generated at this time.
  • the second reverse is performed in the state where the leveling function of the dobby shedding device 23 is enabled.
  • the state (driving state) of the dobby shedding device 23 for driving the heald frames 7 in the shedding driving unit 23b is changed for each weaving cycle so that each heald frame 7 is moved to the vertical position corresponding to the selection pattern.
  • the control performed to change the driving state of the shedding driving unit 23b is based on the select command generated by the dobby controlling device 23a at the time point approximately one cycle prior to the weaving cycle set in the shedding pattern.
  • the control in the reverse operation (reversing the main shaft 2) of the loom 1 is performed similarly.
  • the dobby shedding device 23 is driven to reverse following the reverse of the main shaft 2 in such a manner that the vertical position of each heald frame 7 in the previous weaving cycle preceding the event cycle is positioned in accordance with the reverse-pattern-based select command.
  • the main shaft 2 is continuously reversed from the stand-by state up to the crank angle (180°) at which the warps T form the maximum shed in the previous weaving cycle preceding the event cycle
  • each heald frame 7 at the crank angle 180° in the event cycle is positioned at the vertical position corresponding to the selection pattern of the weaving cycle during weaving.
  • the dobby shedding device 23 is driven while the each heald frame 7 is positioned at the vertical position corresponding to the selection pattern at the crank angle 180° in the previous weaving cycle preceding the event cycle.
  • the defective-weft-pick removal operation is performed, as described above.
  • the second reverse is stopped once at the time point when a defective weft pick is pickfound, that is, when the crank angle arrives at 180° in the event cycle and the loom 1 is stopped (third stop) at the crank angle.
  • the loom 1 is subjected to the above-described defective-weft-pick removal operation by an operator.
  • the operator operates the reverse button 15b again.
  • the second reverse is restarted in the state where the leveling function of the dobby shedding device 23 is enabled.
  • the second reverse is continued by the time when the crank angle arrives at the crank angle (for example, at the crank angle of 300°) set as the end of the previous weaving cycle preceding the event cycle and the second reverse is stopped at the crank angle.
  • the warps T are brought into the leveled state while the loom 1 is stopped (fourth stop).
  • the operator performs a correcting operation of the warp breakage. After the operator finishes the correcting operation of the warp breakage, the operator operates the operation button. Thus, the loom 1 performs a predetermined start-up operation (not described in detail) for restart and resumes a weaving operation.
  • the loom 1 is reversed up to the crank angle for the second stop, at which the loom 1 is in the stand-by state, while the leveling function of the dobby shedding device 23 is disabled.
  • the subsequent reverse operation of the loom 1 performed for pick finding of a defective weft pick is performed without releasing the leveled warps T.
  • This configuration thus minimizes the occurrence of a stop bar.
  • a correcting operation of the warp breakage also needs to be performed.
  • the warps T are in the leveled state, in which the correcting operation is facilitated, since the second reverse after the second stop is performed while the leveling function of the dobby shedding device 23 is enabled. Thus, the correcting operation of the warp breakage is easily performed.
  • the loom 1 is reversed from the second stop, at which the loom 1 is in the stand-by state, to the third stop, at which a defective weft pick is pickfound, while the leveling function of the dobby shedding device 23 is enabled.
  • the main control device 21 is configured so as to output a leveling command Lc for enabling the leveling function of the dobby shedding device 23 to the dobby shedding device 23 (dobby controlling device 23a) in response to an operation on the reverse button 15b for the reverse.
  • the reverse operation may be performed while the leveling function of the dobby shedding device 23 is disabled, as illustrated in Fig. 5 .
  • the main control device 21 does not output a leveling command Lc even after an operator operates the reverse button 15b in the stand-by state.
  • the reverse operation of the loom 1 toward the crank angle for the third stop is performed while the leveling function of the dobby shedding device 23 is disabled.
  • the dobby shedding device 23 is driven to reverse so as to move the heald frames 7 to the vertical position corresponding to the selection pattern for weaving.
  • an operation for bringing the warps T into the leveled state is performed in this invention.
  • the loom 1 is driven to rotate forward up to a crank angle at which the leveling function of the dobby shedding device 23 is enabled and that is smaller than the crank angle of 360° in the weaving cycle (the above-described event cycle) for the third stop.
  • the loom 1 is driven to rotate forward by, for example, operating the jogging button 15a.
  • the operator After the completion of the forward rotation driving, the operator operates the reverse button 15b to cause the loom 1 to perform the reverse operation up to a crank angle corresponding to the crank angle for the fourth stop in the embodiment.
  • the main control device 21 is configured so as to output a leveling command Lc to the dobby shedding device 23 in response to the operation of the reverse button 15b at this time.
  • the reverse operation of the loom 1 up to the crank angle for the fourth stop is performed while the leveling function of the dobby shedding device 23 is enabled.
  • the warps T are brought into the leveled state at the crank angle, as in the case of the embodiment.
  • the loom 1 in the forward rotation driving after the third stop, the loom 1 may be automatically driven to rotate forward to the above-described crank angle in response to the operation on the reverse button 15b in the third stop state.
  • the main control device 21 may be configured so as to output a forward rotation command to the main shaft controlling unit 25 in response to the operation on the reverse button 15b at this time.
  • the loom 1 is driven to reverse continuously with the forward rotation and, concurrently, the main control device 21 outputs the leveling command Lc to the dobby shedding device 23 in response to the operation on the reverse button 15b.
  • the above-described embodiment describes, as an example, the case where the loom 1 is stopped at the concurrent occurrences of a warp breakage and a weft insertion defect.
  • the case to which the present invention is applicable is not limited to the case where a warp breakage and a weft insertion defect concurrently occur.
  • the loom may be required, after the defective-weft-pick removal operation, to be brought into the stand-by state while the warps T are in the leveled state.
  • the present invention is applicable to the case where such a case is conceivable.
  • the loom 1 itself fails to be notified of such a request for the stand-by state after the defective-weft-pick removal operation.
  • the leveling function at the first reverse is enabled or disabled depending on each cause of stoppage
  • the leveling function is disabled for the case where a weft insertion defect is included in the cause of stoppage.
  • the operation may be performed, for example, in the following manner.
  • the main control device 21 does not output the leveling command Lc even when the reverse button 15b is operated in the state where the loom 1 is in the second stop, as illustrated in the example of Fig. 5 .
  • the operation button When the operation button is operated after the defective-weft-pick removal operation in the state where the loom 1 is in the third stop, the loom 1 is restarted after a predetermined start-up operation is performed.
  • the reverse button 15b When the reverse button 15b is operated, the subsequent reverse operation of the loom 1 may be performed while the leveling function of the dobby shedding device 23 is enabled.
  • the present invention has been described using the case where the loom 1 includes the electronic dobby shedding device 23 as a warp shedding device that provides shedding motion to the heald frames (healds).
  • the loom to which the present invention is applicable is not limited to the loom including such an electronic dobby shedding device as a warp shedding device.
  • the loom may include an electronic jacquard shedding device as a warp shedding device for driving, using a main shaft, each heald in accordance with a predetermined woven design pattern (selection pattern).

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP17155161.7A 2016-02-12 2017-02-08 Method for preparing restart of loom Active EP3205758B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2016024858A JP6612644B2 (ja) 2016-02-12 2016-02-12 織機の再起動準備方法

Publications (3)

Publication Number Publication Date
EP3205758A2 EP3205758A2 (en) 2017-08-16
EP3205758A3 EP3205758A3 (en) 2017-09-13
EP3205758B1 true EP3205758B1 (en) 2020-10-07

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EP17155161.7A Active EP3205758B1 (en) 2016-02-12 2017-02-08 Method for preparing restart of loom

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EP (1) EP3205758B1 (zh)
JP (1) JP6612644B2 (zh)
CN (1) CN107083613B (zh)

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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

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Publication number Priority date Publication date Assignee Title
JP3165264B2 (ja) 1992-10-02 2001-05-14 津田駒工業株式会社 織機の起動方法
JP4909652B2 (ja) * 2005-12-14 2012-04-04 津田駒工業株式会社 織機
JP5398176B2 (ja) * 2008-02-07 2014-01-29 津田駒工業株式会社 織機の緯入れ状況表示方法及びその表示装置

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Also Published As

Publication number Publication date
EP3205758A3 (en) 2017-09-13
JP2017141530A (ja) 2017-08-17
CN107083613B (zh) 2020-06-05
EP3205758A2 (en) 2017-08-16
JP6612644B2 (ja) 2019-11-27
CN107083613A (zh) 2017-08-22

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