Device for stopping bobbin rail of flyer frame at a desired position

A flyer frame comprising;

• a drafting unit;
• a plurality of bobbins;
• a bobbin rail on which said bobbins are mounted;
• means for rotating said bobbins on the bobbin rail so as to take up a roving from the drafting unit on the respective bobbins;
• reciprocating means, receiving a two directional rotational movement, for providing a vertical reciprocating movement of the bobbin rail in accordance with the direction of the rotational movement to be applied;
• a first rotating means for obtaining a rotating movement applied to the reciprocating means for obtaining a usual speed of the reciprocating movement of the bobbin rail for carrying out a shaping operation of the roving on the respective bobbins;
• first detecting means for detecting a full bobbin state of the bobbins wherein a desired amount of roving has been taken up on the bobbin;
• second detecting means for detecting a desired vertical position of the bobbin rail;
• second rotating means for generating, upon the detection of the full bobbin state by the first detecting means, a rotational movement independent from that obtained by the first rotating means, said second rotating means for obtaining a vertical reciprocating movement of the bobbin rail which is faster, by a predetermined fixed amount, than that obtained by the first rotating means;
• means, upon the detection of the desired vertical position of the bobbin rail, for stopping the flyer frame.

A flyer frame comprising:

• a drafting unit;
• a plurality of bobbins;
• a bobbin rail on which said bobbins are mounted;
• means for rotating said bobbins on the bobbin rail so as to take up a roving from the drafting unit on the respective bobbins;
• a first source for generating a two directional rotating movement;
• reciprocating means receiving the rotational movement from the first source for obtaining a vertical reciprocating movement of the bobbin rail in accordance with the direction of the rotational movement for obtaining a usual speed of the reciprocating movement of the bobbin rail for carrying out a shaping operation of the roving on the respective bobbins;
• a second source for generating a two differential rotational movement which is independent from the first source;
• a differential gear arranged between the first source and the second source, and the reciprocating means for obtaining a combined rotational movement from the first and second sources which is applied to the reciprocating means for obtaining an increased speed of the bobbin rail irrespective of the direction of the movement of the bobbin rail;
• first detecting means for detecting a full bobbins state of the bobbins wherein a desired amount of roving has been taken up on the bobbin;
• second detecting means for detecting a desired vertical position of the bobbin rail when the bobbin rail moves upwardly;
• operating means for operating the second source, upon the detection of the full bobbin state by the first detecting means, so that an increase speed of the reciprocating movement of the bobbin rail of a predetermined fixed amount is obtained, and;
• means for stopping the flyer frame, upon the detection of the desired vertical position of the bobbin rail by the second detection means when the bobbin rail moves upwardly.

A flyer frame comprising:

• a drafting unit;
• a plurality of bobbins;
• a bobbin rail on which said bobbins are mounted;
• means for rotating bobbins on the bobbin rail so as to take up a roving from the drafting unit on the respective bobbins;
• a first source for generating a two directional rotating movement;
• reciprocating mean receiving the rotational movement from the first source for obtaining a vertical reciprocating movement of the bobbin rail in accordance with the direction of the rotational movement to be applied for obtaining a usual speed of the reciprocating movement of the bobbin rail for obtaining a usual speed of the reciprocating movement of the bobbin rail for carrying out a shaping operation of the roving on the respective bobbins;
• a second source for generating a two directional rotational movement which is independent from the first source;
• a differential gear arranged between the first source and the second source, and the reciprocating means for obtaining a combined rotational movement from the first and second sources which is applied to the reciprocating means for obtaining an increased speed of the bobbin rail irrespective of the direction of the movement of the bobbin rail;
• first detecting means for detecting a full bobbin state of the bobbins wherein a desired amount of roving has been taken up on the bobbin;
• second detecting means for detecting a desired vertical position of the bobbin rail;
• third detecting means for detection of the vertical position of the bobbin rail higher than the desired position;
• operating means for operating the second source, upon the detection of the full bobbin state by the first detecting means, so that an increase speed of the reciprocating movement of the bobbin rail of a predetermined fixed amount is obtained in such a manner that a reduced rotational movement of the same direction as that by applied by the first source is obtained by the second source when it is determined that the bobbin rail is moved upwardly when it is detected that the bobbin rail is located below the desired position, or the bobbin rail moved downwardly when it is detected that the bobbin rail located above the desired position, and that an increased rotational movement as opposite the direction as that by applied by the first source is obtained by the second source when it is determined that the bobbin rail is moved upwardly when it is detected that the bobbin rail is located above the desired position, or the bobbin rail moved downwardly when it is detected that the bobbin rail located below the desired position, and;
• means for stopping the flyer frame, upon the detection of the desired vertical position of the bobbin rail by the second detecting means.