Howa Machinery, Ltd.

Yoshio Kurachi

Takashi Kogiso

Shigeki Sekiya

Kunio Shinkai

Hiroyuki Kureishi

Yukitaka Nomura

Toyoo Suzuki

Kenji Sasaki

Hirotaka Nishikawa

Kanehiro Ito

Teruhiko Sato

Makoto Ohmori

Shunji Ito

Hideki Hashimoto

Toshiyuki Kuzutani

When a residual amount R of a roving required to make a bobbin full at a desired stopping position A of the bobbin rail which moves upwardly is smaller than the amount (4.times.L) corresponding to remaining four layers of the roving for a normal winding process, a desired amount Q is calculated as the residual amount R divided by 4. The switching of the roving during the downward movement of the bobbin rail is done when the amount of the roving from the top end of the bobbin rail is equal to the desired spinning amount Q. This operation is repeated until a full bobbin amount is detected by an encoder, and the flyer frame is stopped.

Method and device for winding a roving in a flyer frame

A sliver piecing unit 80 includes three sets of separable rollers 804 and 844, 806 and 846, and 808 and 848 for nipping a sliver S1 fed from a consumed can to a spinning machine. A throttling nozzle 870 is arranged between the second and third sets of rollers 806 and 846, and 808 and 848. The draft ratio between the first and second sets of rollers 804 and 844, and 806 and 846 can be varied between 1.0 and 2.0. A sliver feed unit 70 includes a separable first and second roller 702a and 702b for feeding a sliver S2 from a full can to the piecing unit 80 so that the slivers S1 and S2 are combined. The draft ratio between the first and second sets of rollers 804 and 844, and 806 and 846 is controlled to obtain combined slivers of a thickness corresponding to that of a single sliver. A nipping belt 884 and nipping roller 886 are provided at the outlet from the third set of the rollers 808 and 804 for obtaining a rubbing movement in the combined slivers. A breaking element 802 is provided at the inlet to the first set of the rollers 804 and 844 to break the first sliver S1 after the completion of the piecing operation.

Method and apparatus for piecing slivers in a spinning machine by

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.

Apparatus for winding a roving applied to a roving frame

In a sliver piecing operation by an apparatus for continuously supplying slivers mechanically to a roving frame, wherein a plurality of aligned sliver cans are arranged along the longitudinal direction of the roving frames in a taper arrangement with regard to the volume of sliver contained therein. Full packaged sliver cans are aligned at a standby position adjacent to and facing the aligned sliver cans which contain the smallest volume of sliver therein, and when the above-mentioned sliver cans having the smallest volume of sliver reach an almost exhausted condition, a unit sliver piecing operation of piecing a leading end portion of sliver from one of each of the full packaged sliver cans with a trailing end portion of each sliver supplied to the roving frame, created by separating same from each sliver supplying can facing thereto, is carried out in steps at all of the above-mentioned full packaged sliver cans. When the full packaged sliver cans are at the standby positions thereof, a position of an end of a sliver from each of the full packaged sliver cans is regulated to a predetermined angular position with respect to the longitudinal axis of the sliver can.

Apparatus for continuously supplying and piecing slivers to a roving

When a full bobbin signal from a counter CCM counting the number of rotations of the front roller (3) is output, the control element (28) outputs a signal directed to the control motor (M2) of a unit (29) for reciprocating a bobbin rail (10). As a result, the rotation of the control motor (M2) is combined with the rotation of a differential gear (14 ) connected to the main motor (M1), so that a reciprocating movement of the bobbin rail (10) after the full bobbin state is obtained which is faster than that obtained during a usual taking up operation of the roving, which causes the roving to be wound on the bobbin in a much coarser state than usual. A limit switch (LSP) detects a predetermined desired position of the bobbin rail (10), and the control element (28) outputs a signal directed to the unit (29), whereby the main motor (M1) and the control motor (M2) are stopped.

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

A method and apparatus for continuously supplying slivers mechanically to a roving frame, wherein a plurality of aligned sliver cans are arranged along the longitudinal direction of the roving frames in a taper arrangement with regard to the volume of sliver contained therein-full packaged sliver cans are aligned at a standby position adjacent to and facing the aligned sliver cans which contain the smallet volume of sliver therein, and when the above-mentioned sliver cans having the smallest volume of sliver reach an almost exhausted condition, a unit sliver piecing operation of piecing a free end of sliver from one of each of the full packaged sliver cans with a free end of each sliver supplied to the roving frame, created by separating same from each sliver supplying can facing thereto, is carried out in steps at all of the above-mentioned full packaged sliver cans. When the packaged sliver cans are at the standby positions thereof, a position of an end of a sliver from each of the full packaged sliver cans is regulated to a predetermined angular position with respect to the longitudinal axis of the sliver can.

Method for continuously supplying slivers to a roving frame

A method and apparatus for transporting roving bobbins in a spinning factory utilizing a factory building having several floors for the installation of spinning machines such as roving frames and ring spinning frames, between specified positions on a floor where roving frames are installed and positions for carrying out a roving bobbin exchanging operation for ring spinning frames, wherein a guide rail system for displaying a plurality of bobbin carriers provided with a plurality of bobbin hangers is suspended from the ceiling of the floor on which the ring spinning frames are installed and transporting passages, provided with apparatus for displacing a plurality of pairs of roving bobbins by successive unit cycle operations composed of a first upwards displacing operation and a second downwards displacing operation, is arranged between each of the above-mentioned specified positions and a corresponding transfer position for the bobbin carriages at which the roving bobbins can be transferred thereto and therefrom at the uppermost position thereof, and capable of transferring roving bobbins between the above-mentioned specified position and the displacing means at the lowermost position of the transporting passage.

Method and apparatus for transporting roving bobbins in a spinning

A method for transporting articles in a system for transferring such articles between different machines provided on different floors of a building, wherein a predetermined number of articles are taken from a machine, the articles being hung in rows on a carrying unit moving along a guide rail, taking the articles to a lift, storing the articles in the lift while the articles are still hanging on the carrying unit, transferring the articles to another floor, withdrawing the articles from the lift while still hanging on the carrying unit, moving the carrying unit on a guide rail, and taking the articles to another machine by moving the carrying unit along the guide rail.

Method and apparatus for transporting articles

An apparatus for preventing an unwinding of a roving end from a full package roving bobbin during the transportation thereof. This apparatus is constructed in combination with the transportation mechanism formed in the known doffing mechanism or known overhead roving bobbin transportation system, in a condition such that a part of the constitutional mechanical elements of such known transportation mechanisms are utilized as a part of the constitutional mechanical elements of the apparatus according to the present invention. In the apparatus of the present invention, a pressing member is utilized for applying pressure against the peripheral face of the winding portion of each roving bobbin while this bobbin is rotating, and therefore the free end of the roving is firmly attached to the above-mentioned peripheral face of the roving bobbin. Consequently, any possible problems due to an unexpected unwinding of the roving can be effectively prevented.

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Nishikasugai, Japan

Yoshio Kurachi