An operating device of a loom comprises a setter for setting at least one parameter, and a controller which, when an operation signal is inputted, makes the loom perform a low-speed normal rotation process for normally rotating the main shaft of the loom at a low speed and then a blank beating operation process without accompanying weft insertion while actuating the loom, and subsequently, shifting the loom to an ordinary operation process accompanying weft insertion. In the setter, it is possible to manually set the termination time of at least one of the low-speed normal rotation process and the blank beating operation process as the parameter.

[Purpose] To provide set points of a loom by taking into account requirement information to be weighted in a weaving factory.

[Constitution] The set point deciding apparatus comprises an input device for inputting input information, and an output device for deciding and outputting set points of operating conditions of a loom on the basis of the input information. The input information includes specification information of a cloth and requirement information on production of the cloth. The output device decides and outputs the set points of the operating conditions of the loom on the basis of the specification information of the cloth and the requirement information.

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.

The weft bar preventing apparatus comprises: a target tension processor (76) capable of setting a target tension (Ts) of the warp (12) at a start preparation time at a value different from a target value (Tr) at a regular operation time; and a drive circuit (78, 86, 94, 98) for driving a warp beam (14) so as to make a target tension of the warp (12) corresponding to the start preparation time by a start preparation signal (S4) inputted prior to starting operation of a loom (10). In the target tension processor (76), information for determining the target tension (Ts) at the start preparation time by the target tension (Tr) at the regular operation time is set, and the target tension processor determines, at the time of setting the target tension of the regular operation time, the target tension at the start preparation time on the basis of the target tension at the regular operation time and said information.

A filling bar preventing method starts a loom (10) after completing a preparatory starting procedure including a cloth fell position correcting operation that corrects the position of the cloth fell (22) by turning a surface roller (28) included in the loom (10), and a warp tension adjusting operation that adjusts warp tension to a predetermined warp tension by turning a warp beam (14) included in the loom (10). The preparatory starting procedure is completed by completing the warp tension adjusting operation after the completion of the cloth fell position correcting operation.

The weft bar preventing apparatus comprises: a target tension processor (76) capable of setting a target tension (Ts) of the warp (12) at a start preparation time at a value different from a target value (Tr) at a regular operation time; and a drive circuit (78, 86, 94, 98) for driving a warp beam (14) so as to make a target tension of the warp (12) corresponding to the start preparation time by a start preparation signal (S4) inputted prior to starting operation of a loom (10). In the target tension processor (76), information for determining the target tension (Ts) at the start preparation time by the target tension (Tr) at the regular operation time is set, and the target tension processor determines, at the time of setting the target tension of the regular operation time, the target tension at the start preparation time on the basis of the target tension at the regular operation time and said information.

An apparatus for preventing accidental operation of a loom is characterized by storing at least one of first information and second information, the first information representing that, after the loom is stopped by a detection signal from an abnormality detection sensor (34, 36, 38, 40), an operation to have a drive shaft of a shedding device (96) normally rotate or reverse to a rotational angle to remove the weft inserted immediately before insertion is not performed, and the second information representing that an operation to have the drive shaft normally rotate or reverse to a rotational angle to start running of the loom is not performed, and by stopping start running of the loom in case the first or second information is stored in the memory at the time of input of an operation command signal.

Die Erfindung betrifft ein Verfahren zum Anwerfen von mit einem elektromotorischen Hauptantrieb ausgerüsteten Webmaschinen, wobei wenigstens eine Schwungmasse vom Hauptantriebsmotor angetrieben wird, die über eine Kupplung an die Webmaschinenhauptwelle kuppelbar ist, und zum Anwerfen der Webmaschine der Hauptantriebsmotor und die Schwungmasse auf eine vorgegebene, gegenüber ihrer Nenndrehzahl höhere Startdrehzahl gebracht wird, und bei Erreichen der vorgegebenen Startdrehzahl die Schwungmasse an die Webmaschinenhauptwelle gekuppelt wird. Gemäß der Erfindung soll die erforderliche Startdrehzahl automatisch ermittelt werden.

Erfindungsgemäß wird dies dadurch erreicht, dass die Drehzahl der Webmaschinenhauptwelle mindestens beim ersten Blattanschlag gemessen und die Abweichung der gemessenen Drehzahl von der Nenndrehzahl ermittelt wird, wobei in der Webmaschinensteuerung ein Auswerten und Abspeichern der Messwerte erfolgt und eine Startdrehzahl für den Anwerfvorgang auf Grundlage der ermittelten Messwerte berechnet wird, derart, dass bei einem erneuten Start der Webmaschine mindestens die Nenndrehzahl beim ersten Blattanschlag erreicht wird.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Vermeiden von Bremsverzögerungen beim Auslösen einer Bremsung des Webmaschinen-Hauptantriebs nach lang anhaltendem, ununterbrochenem Weben zu schaffen, und infolge der Bremsung Anlaufstellen im Gewebe zu vermeiden.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass der Webprozess wahlweise durch einen Schussfadenbruch oder ein dem Schussbruch adäquates Ereignis in dem Schussfadenzuführsystem zwischen der Vorratsspule und einem Vorspuler einer Webmaschine oder durch Erreichen eines anderen, der Webmaschinen-Programmsteuerung vorgegebenen Kriteriums, unterbrochen wird.

A device for controlling the working speed of a loom, during the starting run of the loom, wherein the motor section of the loom comprises a double-speed motor. A first lower speed is equal to the steady speed of the loom; a second higher speed is equal or higher than a predetermined launching speed. During the starting run, the instantaneous speed of the motor is continuously monitored and the motor section is connected, through a main clutch group, to the weaving section of the loom, in a rest state, when said speed is equal to a predetermined launching speed.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Vermeiden von Bremsverzögerungen beim Auslösen einer Bremsung des Webmaschinen-Hauptantriebs nach lang anhaltendem, ununterbrochenem Weben zu schaffen, und infolge der Bremsung Anlaufstellen im Gewebe zu vermeiden.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass der Webprozess wahlweise durch einen Schussfadenbruch oder ein dem Schussbruch adäquates Ereignis in dem Schussfadenzuführsystem zwischen der Vorratsspule und einem Vorspuler einer Webmaschine oder durch Erreichen eines anderen, der Webmaschinen-Programmsteuerung vorgegebenen Kriteriums, unterbrochen wird.

A loom restarting method restarts a loom stopped due to a loom stopping cause without entailing a "wavy set mark". When a loom is stopped due to a loom stopping cause entailing faulty picking, the loom restarting method provides a loom stopping command, withholds the loom from a picking operation during a braking period for braking the loom to stop the same in a weaving cycle subsequent to a weaving cycle in which the loom stopping cause occurred, reverses the loom to the weaving cycle in which faulty picking occurred, removes a weft yarn picked by faulty picking, and restarts the loom to resume a normal weaving operation. The main shaft of the loom is positioned, after removing the weft yarn picked by faulty picking, at an angular position at which a picking operation is possible in the weaving cycle in which the weft yarn picked by faulty picking was removed and the reed of the loom is not in contact with a weft yarn inserted in the cloth fell of a fabric on the loom, and then the loom is restarted.

When weaving operation is stopped due to a weft insertion failure, the loom is driven in a backward direction so that pick finding is conducted and a defective weft yarn is removed. After that, the loom is reset to a start state. In this case, a shed is formed in accordance with a correction pattern SKsj (j=1, 2...) instead of a regular shedding pattern SKi. By setting the shedding size of the correction pattern SKsj to the warp yarn is not in excessively large tension. In this manner, weft yarns woven into a fabric before the occurrence of weft insertion failure are not undesirably moved, thereby keeping the density of weft yarn uniform, and preventing filling bar in the fabric.

A control system for a shuttleless loom, in which the electric motor (24) driving the warp beam (25) is connected to the electric motor (15) driving the take-up roller (13) via a first control unit (20) for the electrical signal controlling the beam motor (24), and of which the transformation ratio is adjustable by the loom control unit (16); to the first control unit (20) there is also fed a signal representing the difference between the tension signal of the tension sensor and a set signal, the two said motors (24,15) being synchronized with each other by the electrical signal of an angular velocity and/or position transducer (4) applied to the shed formation device, which signal is fed to the beam motor (24) and to the input of said first control unit (20) via an analogous second control unit (19), adjustable by said loom control unit (16).