摘要:
A method for preventing weft bars from being formed when a loom (1) stops, the loom (1) being operated on the basis of a shedding pattern of which a single repeat includes at least three cycles of a main shaft (23), includes a setting step of setting activation/non-activation of a plurality of kinds of weft-bar-prevention units (44) and activation quantity for when the weft-bar-prevention units (44) are activated in accordance with the combination of the cause of stoppage of the loom (1) and at least one of the cycle number in the repeat of the shedding pattern and a stop time for which the loom (1) has been stopped and a controlling step of controlling the weft-bar-prevention units (44) on the basis of the settings made in the setting step.
摘要:
An air jet loom includes a main nozzle (1) for weft insertion and a plurality of sub-nozzles (3) arranged along a weft insertion path, the sub-nozzles (3) ejecting air at preset timings in a relay manner from the sub-nozzle (3) closest to a weft insertion side to assist a movement of a weft yarn (Y) ejected from the main nozzle (1). The air jet loom includes an auxiliary ejection nozzle (10, 20) provided such that an ejection hole thereof is positioned near a distal end portion of the main nozzle (1), the auxiliary ejection nozzle (10, 20) ejecting air such that the air acts on the weft yarn (Y) pulled out from the main nozzle (1). When the air jet loom uses a pre-dyed yarn as the weft yarn (Y), the auxiliary ejection nozzle (10, 20) is caused to eject the air in a predetermined period within a period from a time of completion of the weft insertion to a time at which the weft yarn (Y) is restrained by warp yarns (T).
摘要:
A loom in which a weft arrival time is detected each time a weft insertion operation is performed includes a weft-insertion-condition display apparatus (20). The weft-insertion-condition display apparatus (20) calculates statistics (average, maximum and minimum values, and standard deviation) regarding weft arrival times detected in each of predetermined sampling periods on the basis of the detected weft arrival times, stores the statistics that are sequentially calculated during a weaving operation in time series, and graphically displays the stored statistics in time series along a time axis. An occurrence status of stoppages of the loom that have occurred in each of the predetermined sampling periods is displayed such that the number of stoppages can be visually recognized along the same time axis as the time axis along which the statistics are graphically displayed.
摘要:
A loom in which a weft arrival time is detected each time a weft insertion operation is performed includes a weft-insertion-condition display apparatus (20). The weft-insertion-condition display apparatus (20) calculates statistics (average, maximum and minimum values, and standard deviation) regarding weft arrival times detected in each of predetermined sampling periods on the basis of the detected weft arrival times, stores the statistics that are sequentially calculated during a weaving operation in time series, and graphically displays the stored statistics in time series along a time axis. An occurrence status of stoppages of the loom that have occurred in each of the predetermined sampling periods is displayed such that the number of stoppages can be visually recognized along the same time axis as the time axis along which the statistics are graphically displayed.
摘要:
A loom includes a display device, and a weft arrival time is detected each time a weft insertion operation is performed in the loom. The display device calculates statistics regarding the weft arrival times for each of predetermined sampling periods on the basis of the detected weft arrival times, stores the statistics that are sequentially calculated during a weaving operation in time series, and graphically displays the stored statistics in time series along a time axis. Information regarding a change in a weaving condition is displayed on the same screen as a display screen on which the statistics are displayed. The information regarding the change in the weaving condition includes an input history regarding a change in a setting of the weaving condition.
摘要:
A method for preventing weft bars from being formed when a loom (1) stops, the loom (1) being operated on the basis of a shedding pattern of which a single repeat includes at least three cycles of a main shaft (23), includes a setting step of setting activation/non-activation of a plurality of kinds of weft-bar-prevention units (44) and activation quantity for when the weft-bar-prevention units (44) are activated in accordance with the combination of the cause of stoppage of the loom (1) and at least one of the cycle number in the repeat of the shedding pattern and a stop time for which the loom (1) has been stopped and a controlling step of controlling the weft-bar-prevention units (44) on the basis of the settings made in the setting step.
摘要:
Heddle frames WF are moved up and down while keeping the main shaft A non-rotated after setting the main shaft A to a restart position so as to give a sufficient strain to the warp yarn Y. Thereafter, the loom is restarted and proceeded to a normal weaving operation after rendering the heddle frames WF to a synchronous relation to the main shaft A, thereby securing constant weft yarn density. This arrangement makes it possible to prevent formation of a filling bar in a fabric at the time of restarting the weaving operation of the loom.