US 5,341,633 AGranted

Apparatus for winding a roving applied to a roving frame

AssigneeHowa Machinery, Ltd.

InventorsHirotaka Nishikawa, Yoshio Kurachi, Takashi Kogiso, Shigeki Sekiya, Teruhiko Sato, Hideki Hashimoto, Makoto Ohmori, Kenji Sasaki

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Abstract

In a roving winding apparatus applied to a roving frame provided with a plurality of draft parts and corresponding bobbin wheels, a bobbin shaft for driving the bobbin wheel, a bobbin rail on which the bobbin shaft is rotatably horizontally mounted along the longitudinal direction thereof, a lifting motion mechanism for lifting the bobbin rail, and a main motor for driving the draft parts at a predetermined rotational speed, wherein the bobbin shaft is driven under a controlled condition created by a servomotor to follow a digital signal output from the rotation angle detecting device applied to the common bottom front roller of the draft parts, in an adjusted optimal condition under the control of a computer system, incorporated with the lifting motion of the bobbin rail.

Claims12

Dependent claims

A roving winding apparatus applied to a roving frame to produce roving bobbins, wherein the apparatus is provided with a plurality of draft parts and corresponding bobbin wheels, a bobbin shaft for driving said bobbin wheels, an elongated bobbin rail on which said bobbin shaft is rotatably mounted along the longitudinal direction thereof, a lifting motion mechanism for lifting said bobbin rail, a main driving motor for driving said draft parts at a predetermined rotational speed, said draft parts being provided with a common bottom front roller, and said lifting motion mechanism being provided with a mechanism for changing over a direction of displacement of said bobbin rail, comprising:

means for detecting a rotational angle of said bottom front roller and producing a digital signal representative of the rotational angle of said bottom front roller;
means for inputting data required to compute at least a diameter of said roving bobbin;
means for storing said data supplied from said input means;
means for computing the diameter of said roving bobbin based upon said stored data;
a digitally controlled motor for rotating the bobbin wheel, arranged independently from said main driving motor through said bobbin shaft;
and
digital control means for controlling a rotation angle of said digitally controlled motor based upon an output signal of said means for computing said diameter of the roving bobbin, in a relation with an output of said means for detecting said rotational angle of said bottom front roller;
whereby said digitally controlled motor rotates said bobbin wheel with said rotation angle computed by an output of said means for computing the diameter of said roving bobbin in relation to said digital signal of said sensing means, so that the balance between the winding length of said roving relying upon said rotation angle of said bobbin wheel on said roving bobbin and the delivery length of said roving relying upon said rotational angle of said bottom front roller is maintained.

5 more elements

A roving winding apparatus applied to a roving frame to produce roving bobbins, wherein the apparatus is provided with a plurality of draft parts and corresponding bobbin wheels, a bobbin shaft for driving said bobbin wheels, an elongated bobbin rail on which said bobbin shaft is rotatably mounted along the longitudinal direction thereof, a lifting motion mechanism for lifting said bobbin rail, a main motor for driving said draft parts at a predetermined rotational speed, said draft parts being provided with a common bottom front roller, and said lifting motion mechanism being provided with a change over mechanism for changing over a direction of displacement of said bobbin rail, comprising:

digital control means for producing a signal based on the combination of a sensed rotation angle of the bottom front roller and a computed diameter of the roving bobbin;
a digitally controlled motor for rotating the bobbin wheel, actuated by said signal issued from said digital control means and arranged independently from said main motor, said digitally controlled motor being actuated through a rotation angle for thereby rotating the bobbin wheel a predetermined rotation angle corresponding to the rotation angle of the bottom front roller and in accordance with the diameter of the roving bobbin, whereby the rotation angle of said bobbin wheel is controlled to a condition precisely corresponding to said rotation angle of said front roller so that the balance between the winding length of the roving on said roving bobbin and the delivery length of the roving is maintained;
said bobbin rail lifting mechanism including a lifter shaft for alternately displacing said bobbin rail upward and downward, said lifter shaft being driven by transmitting a rotation of said digitally controlled motor through said displacing direction change-over mechanism of said bobbin rail;
said change-over mechanism including a gear box, a pair of supporting shafts rigidly mounted on said gear box, a change-over rod shaft slidably supported by said supporting shafts along the axial direction thereof;
a change-over drive mechanism for actuating said change-over rod shaft;
a change-over wheel rotatably mounted on said change-over rod shaft in such a manner that a displacement thereof along the axial direction of said change-over rod shaft is restricted, said change-over wheel being provided with annular teeth at both sides thereof and further meshed with an intermediate gear for transmitting a driving power thereof to said lifting motion mechanism;
a pair of driven gears rotatably mounted on said pair of supporting shafts at both sides of said change-over wheel, each of said driven gears being provided with an annular gear formed on a side thereof facing said change-over wheel while meshing with corresponding annular teeth of said change-over wheel;
a control shaft indirectly driven by said digitally controlled motor;
and
a pair of drive gears rigidly mounted on said control shaft and meshing with a corresponding one of said driven gears.

7 more elements

Dependencies are inferred from the claim text.