EP1382727B1 - Vorrichtung zum Vermeiden einer ungewollten Inbetriebnahme einer Webmaschine - Google Patents

Vorrichtung zum Vermeiden einer ungewollten Inbetriebnahme einer Webmaschine Download PDF

Info

Publication number
EP1382727B1
EP1382727B1 EP03012053A EP03012053A EP1382727B1 EP 1382727 B1 EP1382727 B1 EP 1382727B1 EP 03012053 A EP03012053 A EP 03012053A EP 03012053 A EP03012053 A EP 03012053A EP 1382727 B1 EP1382727 B1 EP 1382727B1
Authority
EP
European Patent Office
Prior art keywords
loom
weft
controller
state
prevented
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.)
Expired - Fee Related
Application number
EP03012053A
Other languages
English (en)
French (fr)
Other versions
EP1382727A1 (de
Inventor
Mutsuo Fujitani
Yasunori Ota
Ryosuke Fujimori
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tsudakoma Industrial Co Ltd filed Critical Tsudakoma Industrial Co Ltd
Publication of EP1382727A1 publication Critical patent/EP1382727A1/de
Application granted granted Critical
Publication of EP1382727B1 publication Critical patent/EP1382727B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • 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
    • D03D39/00—Pile-fabric looms
    • 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

Definitions

  • the present invention relates to an apparatus for preventing accidentally resuming operation of a loom after the loom is stopped due to abnormality in the loom such as weft stop, warp stop and the like.
  • an operation button for operating a loom during stoppage of the loom is generally made operable. Therefore, in a conventional loom, even if an operator has not restored, operation of the loom is resumed in that state if the operation button is operated. In such a case, the quality of a cloth is degraded.
  • EP 0 507 739 A1 discloses an apparatus for preventing weaving bar in a loom which is caused by the slow forward or reverse rotation of the loom while the weaving operation of the loom is being interrupted.
  • a so-called short pick can be removed by slow rotation control means which accomplish the slow and reverse rotation movements necessary to remove the weft and the "short pick".
  • Weft failures caused by a malfunction of a weft length measuring storage unit or a weft insert device are not addressed in this document.
  • US 5,165,454 relates to a warp insertion monitoring method and apparatus for positively protecting woven cloth from defects due to warp insertion error or failure. Warp failure detection takes place during a period during which the loom is stopped. US 5,165,454 does not cover any weft insertion failures or restarting control measurements related to such failures.
  • An object of the present invention is to provide an improved apparatus which prevents degradation in quality of a cloth due to resuming of operation when an operator has not restored the cause of stoppage.
  • Such an apparatus for preventing accidental operation according to the present invention is defined by claim 1.
  • the loom is a pile weaving machine
  • the operation preventing circuit may be adapted to prevent the operation of the loom in case the first or the second information is stored in the memory at the time the operation command signal is inputted, whether or not the time the abnormality detection signal is generated was either at a fast picking or a loose picking.
  • the controllers can include detection means for generating the detection signal for eliminating the first or second information in the memory by detecting that the command signal for performing the normal rotation or reverse rotation was inputted or that the drive shaft was rotated.
  • the apparatus 10 for preventing accidental operation is used in an air jet loom using, for example, the compressed air as a fluid for weft insertion.
  • the weft 14 wound on a weft package 12 is measured to a predetermined length by a length measuring storage unit 16, and acts as supplied weft engaged by an engagement pin device 18 and stored, with its front end portion led into a main nozzle 20.
  • the weft led into the main nozzle 20 is released by the engagement pin device 18 for a predetermined period of time, jetted together with the compressed air from the main nozzle 20 and inserted into a shedding of the warp 24.
  • the inserted weft 14 is beaten against the cloth fell of a fabric 28 by a reed 26, cut off by a cutter 30 to be cut away from a weft portion led into the length measuring storage unit 16 via the main nozzle 20.
  • a plurality of warp portions 24a located at the end portion on the non-insert side in the direction of the textile width are used as catch cords, while a plurality of selvedge yarns 24b located inside the catch cords 24a as well as a plurality of selvedge yarns 24b located at the end portion on the insertion side are used as selvedge yarns to be formed into a leno tassel selvedge by a selvedge device 32.
  • These catch cords, warp portions and another warps are performed shedding motion by a shedding device driven and connected with a main shaft 50 or other shedding device using a motor driven in synchronism with the rotation of the main shaft 50.
  • the air jet loom further comprises a pair of weft feelers 34, 36 disposed on the non-insert side at an interval in the weft inserting direction, a known dropper device 38 for detecting cutting or looseness of the warps 24; a catch cord sensor 40 for detecting cutting or looseness of the catch cord 24a; a supplied weft sensor 42 for detecting cutting of the weft (supplied weft) 14 drawn out of the weft package 12; and a selvedge yarn sensor 44 disposed in each selvedge device 32 and detecting the cutting or using up of the selvedge yarn 24b.
  • the weft feeler 34 is a known H1 feeler for detecting the front end portion of a correctly inserted weft
  • the weft feeler 36 is a known H2 feeler for detecting that the inserted weft becomes a long pick, a middle cutting or the like, when such a case occurs.
  • the catch cord sensor 40 actuates similarly to the dropper device 38 and detects cutting or looseness of the catch cord 24a.
  • selvedge device 32 and the selvedge yarn sensor 44 those described in Japanese Utility Model Appln. Public Disclosure (KOKAI) No. 62-30364 can be used.
  • Such selvedge device 32 forms a pair of selvedge introduction holes on a turntable to be rotated in synchronism with the rotation of the main shaft 50 and forms a leno texture by the rotation of the turntable.
  • Such selvedge device 32 may be led into the main shaft 50 and driven, connected with the main shaft 50, or may be driven by a motor which is driven in synchronism with the main shaft 50.
  • the selvedge yarn sensor 44 can include a crank energized by a spring so as to resist the tension of the selvedge yarn, and a sensor member for outputting an abnormality signal when the selvedge yarn is abnormal, detecting that the selvedge yarn has arrived at a position corresponding to the yarn abnormality by the elastic force of the spring.
  • selvedge device 32 and the selvedge yarn sensor 44 such a device as mentioned above, a device other than a sensor, and a sensor may be used.
  • Each of the weft feelers 34, 36 and the selvedge yarn sensor 44 acts as a weft sensor, and each of the dropper device 38, the catch cord sensor 40 and the supplied weft sensor 42 acts as a warp sensor.
  • the detection signals of these sensors are supplied to the controller 46 of the apparatus 10 for preventing accidental operation as abnormal detection signals.
  • the controller 46 serves as a main controller for controlling a prime motor (main shaft motor) 48 of the loom as well as various devices of the loom.
  • the controller 46 therefore, receives not only the above mentioned detection signal but also a rotational angle signal ⁇ from an encoder 52 for detecting the rotational angle of the main shaft 50 and receives various set values as set in a setter 54 to control the rotation of the prime motor 48 on the basis of the data such as the received signal and set values.
  • the controller 46 is provided with an input port 60, an output port 62, a central processing unit (CPU) 64 and a memory 66 for storing various pieces of information.
  • CPU central processing unit
  • the controller 46 receives detection signals from the sensors 34, 36, 38, 40, 42 and 44 as well as the rotational angle signal ⁇ from the encoder 52 at the input port and reads in various pieces of information set in the setter 54.
  • the controller 46 further receives at the input port 60 an operation command from an operation command button 68 for starting operation (running) of the loom, an inching command (normally rotate command) from an inching command button 70 for inching the loom, a reverse command from a reverse command button 72 for reversing the loom, a stop command from a stop command button 74 for stopping the loom, a release command from a release command button 76 for releasing the weft from the length measuring storage unit, and a pre-winding command from a pre-wincting command button 78 for winding on the length measuring storage unit 16 at the time the loom stops to store the weft necessary for one weft insertion plus an extra amount.
  • the controller 46 supplies a predetermined control signal through an output port 62, based on various signals, data and commands received, to the selvedge device 32, a switch 80 for opening and closing a path for electricity to the prime motor 48, a switch 84 for opening and closing a path for electricity to an electromagnetic brake 82 which applies braking force to the prime motor 48 and the main shaft 50, a current controller 88 which controls the current supplied to a drive motor 86 for the yarn guide of the length measuring storage unit 16, a drive circuit 92 for controlling the electricity to an engagement pin solenoid 90 of the length measuring storage unit 16, a weft insertion device 94 and a warp shedding device 96, respectively.
  • the controller 46 also controls an indicating lamp 98 which indicates a stoppage of the operation. This informs an operator of the stoppage of the operation. It is, however, possible to inform the operator of the stoppage by letters, a warning sound or voice.
  • Preventing of the operation is done by software according to a program stored in the memory 66 similarly to other controls of the loom.
  • an abnormality detection signal is outputted from the weft feeler 34 or 36, so that the controller 46 stops the loom, to begin with.
  • the controller 46 automatically reverses the loom to a rotational angle at which the mis-inserted weft can be removed and to a rotational angle to make the loom stand by, and making the operation command button 68 ineffective, and puts the loom to stoppage.
  • the controller 46 informs the operator through an indication lamp or the like (not shown) that the loom is in the stoppage (a standby state), indicates by lighting the indicating lamp 98 the state that the operation is prevented, and even if an operation command is inputted by pushing the operation command button 68, makes the operation command ineffective.
  • a reverse command button 72 to remove the weft inserted immediately before the loom stopped (i.e., mis-inserted weft) and reverses the loom.
  • the mis-inserted weft is exposed at the cloth fell and becomes removable, thereby completing the preparation for removal of the weft.
  • the controller 46 reverses the loom (i. e., the main shaft 50) to the rotational angle for resuming the operation of the loom automatically or by an input of the reverse command. This completes the preparation for resuming the operation. Thereafter, the controller 46 makes the operation command button 68 effective and resumes the operation of the loom by an input of the operation command.
  • the timing for making the operation command button 68 ineffective and bringing into the prevented state of operation can be made an arbitrary time from the occurrence of a cause for stoppage until the loom is stopped at the rotational angle to get into standby.
  • the timing for canceling the prevented state of operation and making the operation command button 68 (i.e., the operation command) effective may be either at the rotational angle to resume operation of the loom or at an arbitrary time when or after the reversing operation of the weft inserted immediately before the stop up to the rotational angle at which the weft can be removed. Further, the removal of the mis-inserted weft can be done either by the operator or automatically.
  • step 101 the controller 46 carries out a step for preventing the operation to stop the loom (step 101).
  • step 101 firstly, energizing of the prime motor 48 is stopped, and the loom is stopped by applying the braking force by an electromagnetic plate 82 to the main shaft 50 (first stop), and next, by reversing the main shaft 50 automatically or manually to the rotational angle at which the weft inserted immediately before can be removed, the loom is stopped at the rotational angle of the main shaft 50to make the loom stand by (second stop).
  • the controller 46 puts the loom into stoppage (standby state) after the second stop and turns an operation preventing flag on.
  • the operation preventing flag is the information representing that an operation for restoring or resuming operation is not performed, and the state of setting this flag is set in the internal memory of the CPU 64 or the memory 66.
  • the controller 46 waits for pushing of a suitable command button.
  • step 104 when the suitable command button is pushed (step 103), the controller 46 judges whether the pushed command button is the operation command button 68 or not (step 104).
  • the controller 46 If the pushed command button is the operation command button 68, the controller 46, being prevented from operating, waits for pushing of another command button.
  • step 105 When another command button is pushed, the controller 46 has the loom perform an action corresponding to the command button pushed for restoration of the cause for stopping (step 105). Concretely, in case of a failure in weft insertion, step 105 reverses the prime motor 48 and the main shaft 50 up to the rotational angle of 180° at which the weft inserted immediately before stopping can be removed to reverse a shedding device 96.
  • the controller 46 judges whether the timing (time to cancel operation-prevented-state) to cancel the stoppage of operation was cleared or not (step 106).
  • the time for judgment it can be preset through the setter 54, for example, making it the time for judgment that the loom (i. e., the main shaft 50) is reversed to a predetermined rotational angle, and more concretely, that the main shaft 50 is reversed to the rotational angle of 300° at which the loom resumes its operation.
  • the controller 46 monitors the rotational angle signal ⁇ of the main shaft 50 of the loom over a period while the main shaft 50 is reversed and can judge whether the set timing for canceling the prevented state of operation was cleared or not.
  • the controller 46 When the normal or reverse rotation is finished, unless the timing for canceling the prevented state of operation is cleared, the controller 46, returning to step 103, waits for pushing of another command button. Concretely, even if the operator stops the loom at 180° by the reverse operation of the above step 105, since the above operation-prevented-state is not cleared, the controller 46, returning to step 103, waits for pushing of the next command button.
  • the main shaft 50 which is the corresponding device, is reversed toward the rotational angle of 300° for the loom to resume its operation (step 105), and the controller 46 judges whether the above-mentioned set timing for canceling the operation-prevented-state is cleared or not and detects that the rotational angle signal ⁇ of the main shaft 50 has reached 300°, then the controller 46 turns the operation preventing flag OFF and, thereafter, cancels the operation-prevented-state to make the operation command effective by operating the operation command button 68 (step 107).
  • step 108 when the operation command button 68 is pushed (step 108), the controller 46 resumes the operation of the loom since the operation-prevented-state has already been cancelled (step 109). Thereafter, the controller 46 controls the loom as usual.
  • timing for canceling the operation-prevented-state is set through the setter 54.
  • Such timing for canceling the operation-prevented-state can be, for example, the timing that the preparation for resuming the operation of the loom is completed, that is, at an arbitrary time when or after the start of the reversal after the weft is removed. More concretely, reaching the rotational angle of 300° at which the loom resumes its operation by the reversal operation can be set as timing for canceling the operation-prevented-state that.
  • step 106 for judging whether the timing for canceling the operation-prevented-state was cleared or not the judgment as to whether the timing for canceling the operation-prevented-state as set in the above was satisfied or not is made every time the push button is operated.
  • the timing for canceling the operation-prevented-state it is possible to use, besides the above-mentioned time, the time when the preparation for the weft removal is completed, that is, an arbitrary time when and after the reverse operation to remove the weft is started, and more concretely, the rotational angle of 180° when the second weft can be removed by the reverse operation to remove the weft. Even in case such timing for canceling the operation-prevented-state was set, since a judgment corresponding to such a set timing is made, an accidental operation and a trouble caused thereby can be prevented likewise.
  • Fig. 6 is shown an example of the motion of the loom from failing in the weft insertion to the resumption of the operation where the angle for resuming the operation of the loom is 300°.
  • the failure in the weft insertion may be one caused by the detection signal of either the weft feeler 34 or 36.
  • Fig. 6 shows an embodiment of the motion of the loom when restoration process for restoring the cause for stoppage (abnormal weft insertion) is carried out when the loom is stopped by the detection signal of either the weft feeler 34 or 36.
  • Fig. 6 also shows a case that a failure in the insertion of the weft 14a indicated by a circle including cross ( x ) mark inside in Fig. 6(B) causes the loom to stop at a time T1, and that the electromagnetic brake 82 is actuated at the rotation angle of 300° in an insertion cycle of the weft 14a, thereby stopping the loom at 250° in an insertion cycle of the subsequent weft 14b.
  • the controller 46 actuates an electromagnetic brake 82 from around 300°.
  • the loom makes inertial rotation of the main shaft 50 to around 250° in the subsequent weft insertion cycle and stops (the first stop).
  • the controller 46 makes the loom automatically reverses at a low speed up to 300°.
  • the loom reaching 300° by the reverse rotation of the main shaft 50, stops the reverse rotation of the main shaft 50 (the second stop), makes display means (not shown) indicate that "the weft stop occurred” and stands by to wait the arrival of an operator.
  • the rotational angle of 300° of the main shaft 50 is an angle for the warp 24 to get into a closed state, in order to prevent generation of a weft bar by elongation of the warp 24 during the standby state.
  • the operator on arrival, pushes a reversal command button 72 immediately so as to restore (remove) the mis-inserted yarn 14a which has caused the loom to stop.
  • the controller 46 reverses the main shaft 50 up to 180° in response to the reversal command.
  • the rotational angle 180° of the main shaft 50 is an angle for the warp 24 to get into an open state, and the mis-inserted yarn 14a is exposed at the cloth fell; in other words, at this time, the preparation for removing the weft is completed. Therefore, the operator can remove the mis-inserted yarn 14a which is in the exposed state.
  • the preparation for removing the weft is completed or not can be recognized by whether the loom is reversed at a low speed up to 180° after the first stop.
  • the judgment as to whether the preparation for removing the weft is completed or not the judgment as to whether or not there are output signals of various sensors such as a guard sensor disposed in the cloth fell for assuring safety of the operator, a sensor for detecting opening and closing of a cover door provided ahead for prevention of a stream for weft insertion from scattering such as a water jet loom, etc., may be added.
  • the controller 46 makes the loom resume the operation.
  • Reversing and resuming the operation of the loom in preparing for resumption of the operation can be performed, not by pushing the reversal command button 72 and the operation command button 68 and based on the inputs of the reversal command and the operation command, but automatically without interruption on the basis of the input of a corresponding command by pushing a command switch (not shown).
  • the operation-prevented-state is automatically cancelled when the command button is operated or the main shaft 50 was reversed up to 300°.
  • Fig. 6 is an example of removing a mis-inserted weft 14a in case of failure in weft-insertion, but the mis-inserted weft 14a and the weft 14 inserted before the mis-inserted weft may be removed. Also, in case of a failure, other than a failure in the weft insertion, such as a warp stop and a failure in the supplied weft, one or more wefts can be removed regardless of the cause of the stoppage.
  • the main shaft 50 i. e., the loom
  • the operation-prevented-state may be cancelled by pushing a command button for inserting one weft after the preparation for removal of the mis-inserted weft was completed, and after the main shaft 50 is rotated at a low speed from 180° up to 300°.
  • a new weft is inserted in place of the mis-inserted one and woven into a cloth.
  • the embodiment shown in Fig. 6 is an example of a plain weave, but can be applied to a pile weaving.
  • a pile fabric can be formed generally by incorporating textures of the pile weaving and the ground fabric by a predetermined length. Also, for example, in a towel weave with three-picks wefts, a pile is formed with two loose picks and one fast pick.
  • Fig. 7 shows an embodiment for removing two wefts regardless of the cause of the stoppage and repairing the cause of stoppage. This embodiment raises the effect of prevention of a weft bar in a woven fabric such as glass fabric using glass fibers.
  • Fig. 7 when any cause of stoppage occurs, the controller 46 actuates the electromagnetic brake 82 from 300°. By this, the loom makes inertia rotation of the main shaft 50 up to the neighborhood of 250° in the following weft insertion cycle and stops (the first stop).
  • the controller 46 makes the main shaft 50 of the loom automatically reversed to 300° at a low speed.
  • the loom when the main shaft 50 is reversed to 300° as a result of the above-mentioned reversal, stops the reversal of the main shaft 50 (the third stop), displays the information "the weft was stopped” in the indication means (not shown), to bring into a standby state to wait for the arrival of the operator.
  • the rotational angle 300° of the main shaft 50 is the angle at which the warp shedding is closed so as to prevent a generation of the weft bar.
  • the operator operates a reverse command button 72 to remove the weft inserted immediately before stopping.
  • This makes the controller 46 reverse the main shaft 50 in response to the reverse command and stop reversing at the rotational angle of 180° (second stop).
  • the rotational angle 180° is, as mentioned above, an angle to bring the warp shedding into an open state.
  • the mis-inserted weft 14a is brought into an exposed state at the cloth fell. For this reason, the operator can remove the initial weft which is in the exposed state.
  • the controller 46 further reverses the loom at a low speed to 300° to stop (fourth stop).
  • the operator pushes down the reverse command button 72 to remove the weft further ahead.
  • This causes the controller 46 to further reverse and the main shaft 50 at a low speed to 180° where the previous weft can be stopped by inputting of the reverse command (fifth stop).
  • the preparation for removing the weft is completed, and at the position of the rotational angle, the previous weft is removed by the operator.
  • the reversal from the position where the first weft can be removed (the rotational angle of the second stop) to the position where the previous weft can be removed (the rotational angle of the fifth stop) may be continuously done.
  • the controller 46 reverses the main shaft 50 at a low speed further to 300° and stops (the sixth stop). At this time, the preparation for resuming operation is completed, so that the operation-prevented-state is cancelled and the indicating lamp 98 is put out.
  • the timing to cancel the operation-prevented-state set in the controller 46 is set through the setter 54.
  • timing to cancel the operation-prevented-state it can be, for example, the time when the preparation for resuming the operation of the loom is completed, that is, an arbitrary time when the reversal started after removing two weft portions or later. More concretely, the timing for canceling the operation-prevented-state can be the time when the rotational angle of 300° for the loom to start its operation by the reverse operation for removing the second weft portion was reached.
  • step 106 for judging whether the timing to cancel the operation-prevented-state was reached or not in the flowcharts shown in Figs. 3 - 6 whether the set timing to cancel the operation-prevented-state was satisfied or not is judged every time the push button is operated. Ultimately, after the second weft portion was removed until the reverse operation is done to the rotational angle of 300° for resuming operation, the operation command is made ineffective, and thereafter, the judgment in step 106 is changed to the next processing step to make the operation command effective. Therefore, an accidental operation can be surely prevented.
  • the timing to cancel the operation-prevented-state may be the time when the preparation for removing the weft portion is completed, that is, an arbitrary time when the operation for removing the second weft portion was started or later, or more concretely, when, by the reverse operation to remove the second weft portion, the main shaft reached the rotational angle of 180° where the second weft portion can be removed. In this case, an accidental operation and inconveniences caused thereby can be prevented by the judgment as to whether or not the rotational angle at which the second weft portion can be removed was reached.
  • Fig. 8 shows an embodiment of an action of the loom by the controller 46 at the time the controller performs a restoring process to restore the cause of stoppage (abnormal selvage yarn) in stoppage because the selvedge yarn sensor 44 outputted an abnormality detection signal (e.g., a selvedge yarn breakage signal).
  • an abnormality detection signal e.g., a selvedge yarn breakage signal
  • the controller 46 When an abnormality in the selvedge yarn occurs at time T1, the controller 46 firstly actuates the electromagnetic brake 82 from 300°. Thereby, the loom stops after inertial rotation of the main shaft 50 to about 250° in the next weft insertion cycle (first stop).
  • controller 46 automatically reverses the loom at a low speed to 300° to make the loom stand by.
  • the controller 46 when the inching command button 70 is pushed and the inching command is inputted, inches the loom to an angle where a restoration process can be done (second stop). Since this enables to complete the preparation for restoration process, the loom can be put into the operation-prevented-state.
  • the restoration process of the abnormality in the selvedge yarn is performed.
  • the controller reverses the loom to 300° at a low speed.
  • the controller 46 cancels the stoppage when the inching command button 70 or the reverse command button 72 is pushed.
  • the controller 46 makes the loom resumes its operation when the operation command button 68 is pushed and the operation command is inputted.
  • the timing to cancel the operation-prevented-state to be set in the controller 46 is set through the setter 54.
  • timing to cancel the operation-prevented-state the time when, after the restoration work of the selvedge yarn and the rotation to the rotational angle to resume the operation of the loom, an operation to rotate the loom to the rotational angle for resuming the operation is performed, more concretely, the time when the rotational angle of 300° for the loom to resume its operation is reached by inching operation or reverse operation may be deemed such timing to cancel the operation-prevented-state.
  • step 106 for judging as to whether or not the timing to cancel the operation-prevented-state in the flowcharts shown in Figs. 3 - 6 was reached, whether or not the timing to cancel the set operation-prevented-state was satisfied is judged every time the push button is operated. Ultimately, the operation command is made ineffective until the rotational angle is reached after the inching or the reversal was performed, and thereafter, the judgment in step 106 is changed to the next process step to make the operation command effective. Therefore, an accidental operation by the judgment in step 106 tat the time of abnormality in the selvedge yarn can be surely prevented.
  • either the rotation to a rotational angle where the restoration work for the selvedge yarn can be easily done more concretely, after the selvedge yarn is broken or used up, inching operation or reverse operation is performed, or any of arbitrary rotational angles between 300° where the loom is in a standby state and a rotational angle positioned at the upper dead center where it is easy to restore a bobbin for the selvedge yarn on the side where the abnormality arose is positioned.
  • the embodiment in Fig. 8 can be applied also when the dropper device 38 or the catch cord sensor 40 outputted an abnormality detection signal.
  • a shedding device 96 may be of a type to be driven, connected to the main shaft 50, or a type to be driven by a special motor independent from the main shaft 50, such as a pick finder device or an electric shedding device.
  • the restoration accompanies the rotation of the main shaft, reaching the rotational angle of the main shaft for performing the restoration is made the timing to cancel the operation-prevented-state, but if it is programmed to automatically rotate to the angle or stop, the operator does not have to confirm the rotational angle but the time the operation was performed can be set as the timing to cancel the operation-prevented-state.
  • Fig. 9 shows an embodiment of the action of the loom by the controller 46 at the time the restoration process is performed to restore the cause of stopping (abnormality in the supplied weft) in stoppage because the weft feed sensor 42 outputted an abnormality detection signal (for example, supplied weft breakage signal).
  • an abnormality detection signal for example, supplied weft breakage signal
  • the controller 46 When an abnormality in the supplied weft occurs at the time T1, the controller 46, receiving the abnormality signal from the sensor 42, actuates the electromagnetic brake 82 firstly from around 300°. Due to this, the loom stops after inertial rotation toward the vicinity of 250° in the subsequent weft insertion cycle (first stop).
  • the controller 46 automatically reverses the loom to 300° at a low speed. Since the preparation for restoration process is completed at this rotational position, the restoration of abnormality in the supplied weft is performed.
  • the controller 46 resumes operating the main shaft 50 of the loom when the operation command button 68 is pushed and the operation command is inputted.
  • the length measuring storage unit 16 is of a type to rotate the yarn guide and wind the weft of a given length around the drum.
  • it is a publicly known weft length measuring storage device provided with a yarn guide to be rotated along the periphery of a immovable drum by a motor independent from a main shaft motor, and an engagement pin to be moved forward and backward relative to the periphery of the immovable drum, driven by an electromagnetic solenoid.
  • the weft length measuring storage unit has a push button capable of realizing manually such functions as to move the engagement pin prior to the operation of the loom, to wind the weft around the immovable drum by rotating the yarn guide by a given amount (pre-winding function), and to move the engagement pin backward (releasing function), respectively.
  • the operation of the release command button 76 is performed in response to the completion of the preparation for restoration, and the operation of the pre-winding command button 78 to the completion of the preparation to resume the operation, respectively.
  • the timing to cancel the operation-prevented-state set in the controller 46 can be set through the setter 54.
  • Such timing to cancel operation-prevented-state may be the time when the release command button 76 or the pre-winding command button 78 is operated.
  • step 106 to judge whether the timing to cancel the operation-prevented-state was satisfied or not in the flowcharts of Figs. 3 - 6 , whether or not the set timing to cancel the operation-prevented-state is judged every time the push button is operated.
  • the operation command is made ineffective, and thereafter, when the judgment in step 106 is changed to the subsequent process step, the operation command is made effective. Therefore, an accidental operation at the time an abnormality occurred in the supplied weft can be surely prevented.
  • the controller 46 cancels the operation-prevented-state when the release command button 76 or the pre-winding command button 78 was pushed. It is possible, however, to utilize operation for another device such as the weft insertion device for canceling the operation-prevented-state. More concretely, it is possible to utilize an operation signal for differentiating the jet air current from the main nozzle at the normal time from the restoring time, as in case of an air jet loom. Further, in place of the output of the command means, it is possible to utilize the output of a sensor for detecting whether or not the restoration work was done.
  • a device of another type may be used.
  • the supplied weft sensor 42 is of a type to sense the weft supplied to the length measuring storage unit, it may a sensor of another type.
  • the location for installing the sensor is not restricted to the position in the illustration but may be any place, if it is located on a yarn route.
  • a process relative to the prevention of operation can be handled by hardware in place of using software. For example, when the restoration accompanies some rotation of the loom, the following steps can be taken.
  • an operation permit circuit shown in Fig. 10 can be disposed between the operation command button 68 and the controller 46.
  • an operation permit circuit 110 to the input of the controller 46, to connect a timing signal generator 112 for generating various timing signals to the input of the operation permit circuit 110, and to connect a timing setter 114 for setting various timings to the timing signal generator 112.
  • timing setter 114 are set various timings such as the rotational angles of the main shaft respectively for stopping to realize restoration process, preparation for restoration process and preparation for resuming operation.
  • the timing setter 112 receives the rotational angle signal ⁇ of the main shaft 50 from the encoder 52 and outputs the timing signal to the operation permit circuit 110 every time the rotational angle of the main shaft 50 reaches the angle set in the timing setter.
  • the operation permit circuit 110 includes a discriminating circuit 116 for outputting an operation permit signal S1 when the timing to cancel the operation-prevented-state was satisfied to that effect, and an AND circuit 118 for outputting an AND signal of the operation permit signal S1 and the operation command by the operation command button 68 to the controller 46 as an operation signal S2.
  • the discriminating circuit 116 receives detection signals S3 from the sensors 34, 36, 38, 40, 42 and 44, an output signal of the timing signal generator 112, the release command from the release command button 76, the pre-winding command from the pre-winding command button 78, and a loom stop signal S4 (or an automatic reversal completion signal S5) from the controller 46.
  • the discriminating circuit 116 outputs the operation permit signal S1 which turns off when the loom stop signal S4 (or the automatic reversal completion signal S5) is inputted and, thereafter, in case the restoration of abnormality in the weft and the like accompanies the rotation of the main shaft 50, turns on when the main shaft 50 of the loom reaches the rotational angle for resuming operation (or when such an operation is performed) and in case the supplied weft is abnormal, turns on when a command signal from the pre-winding command button is inputted.
  • the discriminating circuit 116 may be of a type to output to turn on the operation permit signal S1 when the angle to enable restoration of the cause of stopping such as removal of the mis-inserted weft is reached (or when such an operation is performed).
  • the operation permit circuit 110 cancels the operation-prevented-state when the operation permit signal S1 is generated, and subsequently, the operation signal S2 is outputted to the controller 46 when the operation command is inputted.
  • the circuit shown in Fig. 10 can be also applied to the accidental operation preventing techniques shown in Figs. 1 - 8 .
  • Cancellation of the operation-prevented-state can be also judged by using the output signal of the sensor when pushing down the operation command button.
  • the software process shown in Fig. 11 can applied.
  • the weft sensors 34, 36, 42 and the warp sensors 38, 40, 44 are of the type to output the abnormality detection signals during the detection of abnormality.
  • step 120 when an operator pushes down the operation command button 68 when the restoration process is finished (step 120), the controller 46 judges as to whether the weft sensors 34, 36, 42 and the warp sensors 38, 40, 44 detect abnormality (step 121).
  • step 121 If it is judged in step 121 that an abnormality signal is outputted from a sensor, which caused stopping, the controller 46 does not operate but returns to step 120 and waits for the operation command button 68 to be pushed. At this time, it is preferable to display by the indicating lamp 98 to inform the operator to that effect.
  • the controller 46 turns the operation preventing flags off to cancel the operation-prevented-state and then moves to the step in Fig. 5 (step 122).
  • the process relative to the prevention of operation can be processed by way of the hardware instead of processing by the software.
  • the operation permit circuit shown in Fig. 12 can be disposed between the operation command button 68 and the controller 46.
  • an operation permit circuit 130 can be connected to the input of the controller 46.
  • the operation permit circuit 130 includes a discriminating circuit 132 to which the abnormality detection signals from the sensors 38, 42, 44 and the operation command from the operation command button 68 are inputted, a delay circuit 134 for delaying the operation command for a given period of time, and an AND circuit 136 which outputs the AND signals of both output signals S1, S6 of the discriminating circuit 132 and the delay circuit 134.
  • the discriminating circuit 132 judges as to whether or not any abnormality detection signal is outputted from the sensors 38, 42 and 44 when the operation command from the operation command button is inputted and, if not outputted, cancels the operation-prevented-state and outputs the operation permit signal S1 to the AND circuit 136.
  • the discriminating circuit 130 outputs the operation signal S2 to the controller 46 after the delay time by the delay circuit 134 elapsed when the operation command is inputted.
  • the discriminating circuit 132 makes the operation command ineffective while the abnormality detection signals from the sensors 38, 42 and 44 are being outputted and maintains the operation-prevented-state.
  • the operation preventing function may be made by a changeover switch not to work when the necessity arises, such as in case of gaiting or regulating operation of the loom. Further, it is more convenient to provide a reset button for resetting the function to prevent operation so that the operator can reset the function to prevent operation after recognizing a state of the loom to immediately make the loom operable.
  • the present invention can be applied not only to a liquid jet loom but also to a shuttleless loom such as a rapier loom as well as to a shuttle loom.
  • the present invention is not limited to the above embodiments but can be variously modified without departing its purport.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (3)

  1. Vorrichtung zum Vermeiden einer ungewollten Inbetriebnahme einer Webmaschine mit: einem Fehlererkennungssensor (34, 36, 38, 40) zum Erfassen eines Fehlers beim Schußeintrag, am Schußfaden (14) oder am Kettfaden (24); und
    einer Steuerung (46) zum Anhalten der Webmaschine über ein Fehlererkennungssignal vom Sensor (34, 36, 38, 40) und auch zur Inbetriebnahme der Webmaschine über ein Inbetriebnahmesignal von einem Inbetriebnahmeschalter (68),
    dadurch gekennzeichnet, dass die Steuerung einen Speicher (66) zum Speichern von wenigstens einem von drei Informationensbestandteilen aufweist, welche umfassen:
    - eine erste Information, die repräsentiert, dass, nachdem die Webmaschine durch das Fehlerkennsignal angehalten wurde, ein Betriebsmodus, bei dem die Antriebswelle einer Fachbildungsvorrichtung (96) in normaler Richtung oder entgegengesetzt zu einem Drehwinkel bewegt wird,
    um den Schußfaden, der unmittelbar vor dem Anhalten eingebracht wurde, zu entfernen, nicht durchgeführt wird und/oder
    um einen zweiten Schußfaden zu entfernen, der einen Takt vor dem ersten Schußfaden eingebracht wurde, unmittelbar vor dem Anhalten nicht durchgeführt wird,
    - eine zweite Information, die repräsentiert, dass, nachdem die Webmaschine durch das Fehlererfassungssignal angehalten wurde, ein Betriebsmodus zum Einstellen des Schußfadens (14) in einer Schußfadenlängen-Meß- und Speichereinheit (16) oder einer Schußfadeneintragvorrichtung nicht durchgeführt wird, und
    - eine dritte Information, die repräsentiert, dass ein Betriebsmodus, bei dem die Antriebswelle in normaler Richtung oder in entgegengesetzter Richtung zu einem Drehwinkel bewegt wird, um die Webmaschine in Betrieb zu nehmen, nicht durchgeführt wird, und
    einen Inbetriebnahme-Verhinderungsschaltkreis zum Verhindern der Inbetriebnahme der Webmaschine, im Falle dass zum Zeitpunkt der Eingabe des Inbetriebnahmesignals die erste, zweite oder dritte Information im Speicher (26) gespeichert ist.
  2. Vorrichtung zum Vermeiden einer ungewollten Inbetriebnahme einer Webmaschine nach Anspruch 1, bei welcher die Webmaschine eine Samtwebmaschine ist, und der Inbetriebnahme-Verhinderungsschaltkreis eine Inbetriebnahme der Webmaschine in dem Fall verhindert, wenn zum Zeitpunkt der Eingabe des Inbetriebnahmesignals die erste oder zweite Information im Speicher (66) gespeichert ist, und je nachdem, ob das Fehererfassungssignal bei einem Schnellschuß (fast pick) oder einem Losschuß (loose pick) erzeugt wurde.
  3. Vorrichtung zum Vermeiden einer ungewollten Inbetriebnahme einer Webmaschine nach Anspruch 1 oder 2, bei welcher die Steuerung (46) zusätzlich eine Erfassungsvorrichtung zum Erzeugen eines Erfassungssignals aufweist, um die erste oder zweite Information im Speicher (66) zu eliminieren, indem erfasst wird, dass das Steuersignal zum Durchführen der normalen Rotation oder der Umkehrrotation eingegeben wurde oder dass die Antriebswelle gedreht wurde.
EP03012053A 2002-07-19 2003-05-28 Vorrichtung zum Vermeiden einer ungewollten Inbetriebnahme einer Webmaschine Expired - Fee Related EP1382727B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002210530A JP2004052148A (ja) 2002-07-19 2002-07-19 織機の誤運転防止装置
JP2002210530 2002-07-19

Publications (2)

Publication Number Publication Date
EP1382727A1 EP1382727A1 (de) 2004-01-21
EP1382727B1 true EP1382727B1 (de) 2008-07-30

Family

ID=29774665

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03012053A Expired - Fee Related EP1382727B1 (de) 2002-07-19 2003-05-28 Vorrichtung zum Vermeiden einer ungewollten Inbetriebnahme einer Webmaschine

Country Status (4)

Country Link
EP (1) EP1382727B1 (de)
JP (1) JP2004052148A (de)
CN (1) CN1268798C (de)
DE (1) DE60322477D1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5084179B2 (ja) * 2006-06-02 2012-11-28 津田駒工業株式会社 織機の誤操作防止装置
JP5106972B2 (ja) * 2007-10-02 2012-12-26 津田駒工業株式会社 織機の稼動情報表示方法
CN103015013A (zh) * 2012-11-22 2013-04-03 广东溢达纺织有限公司 织机投纱故障自动处理系统及方法
CN104088064A (zh) * 2014-07-31 2014-10-08 安徽华茂纺织股份有限公司 一种喷气织机的张力停经钩装置
JP7264636B2 (ja) * 2018-12-21 2023-04-25 津田駒工業株式会社 パイル織機におけるパイル高さ異常の検出方法、及びパイル高さ異常を検出するための装置を備えたパイル織機
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
JP2020196972A (ja) * 2019-06-03 2020-12-10 株式会社豊田自動織機 織機の開口不良検知装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248272A (en) * 1979-10-25 1981-02-03 Appalachian Electronic Instruments, Inc. Shed sensing stop motion system for high speed looms
JPH03161555A (ja) * 1989-11-20 1991-07-11 Toyota Autom Loom Works Ltd 織機における経糸通し検出装置
JP2906716B2 (ja) * 1991-04-01 1999-06-21 株式会社豊田自動織機製作所 織機における織段発生防止装置
JP3318394B2 (ja) * 1993-06-02 2002-08-26 株式会社石川製作所 空気噴射式織機における運転再開方法

Also Published As

Publication number Publication date
CN1268798C (zh) 2006-08-09
JP2004052148A (ja) 2004-02-19
CN1475617A (zh) 2004-02-18
DE60322477D1 (de) 2008-09-11
EP1382727A1 (de) 2004-01-21

Similar Documents

Publication Publication Date Title
EP0236597A1 (de) Einrichtung zur Entfernung eines fehlerhaften Schussfadens bei einem schützenlosen Webstuhl
EP1382727B1 (de) Vorrichtung zum Vermeiden einer ungewollten Inbetriebnahme einer Webmaschine
EP0333262B1 (de) Luftstrahlwebmaschine mit verbessertem Schussfadeneintrag
JPH05321096A (ja) ジェットルームにおける止段防止方法
EP1580308B1 (de) Startsteuervorrichtung und Startsteuerverfahren für eine Webmaschine
EP0950741B1 (de) Verfahren zum Wiederstarten einer Webmaschine
JP2519933B2 (ja) 流体噴射式織機の給糸切れ糸排除装置
JPH0665840A (ja) 織機の不良緯糸除去装置
EP0494051A1 (de) Schussfadenhandhabungseinrichtung für Luftwebmaschinen
EP0445687B1 (de) Verfahren und Steuerungsvorrichtung zum Eintragen eines Einzelschusses in einer Düsenwebmaschine
US5642759A (en) Method for avoiding weaving a faulty weft thread during repair of weft thread fault
JPH0431273Y2 (de)
JP2007186838A (ja) 織機
JPH06280139A (ja) 織機の糸端処理装置
JPH07133558A (ja) パイル織機における緯糸処理方法
JP3387174B2 (ja) パイル織機における緯入れミス検出方法
JPH01292147A (ja) 無杼織機における緯糸処理方法
JP2623699B2 (ja) 緯糸処理装置を備えたジェットルームにおける運転制御方法
JP3584568B2 (ja) 織機における製織異常検出制御方法及び装置
JP2643139B2 (ja) 無杼織機における緯糸処理方法
JP2787385B2 (ja) 織機の詳細な停止原因判別方法
JP3185968B2 (ja) 空気噴射式織機の緯糸排出装置
JP3134331B2 (ja) ジェットルームにおける１ショット緯入れ方法
JPH04289247A (ja) ジェットルームにおける１ショット緯入れ方法
JPS6237139B2 (de)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

17P Request for examination filed

Effective date: 20040129

AKX Designation fees paid

Designated state(s): BE DE IT

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE IT

REF Corresponds to:

Ref document number: 60322477

Country of ref document: DE

Date of ref document: 20080911

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20090506

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20140521

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20140513

Year of fee payment: 12

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60322477

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150531

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20170522

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180528