Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Toshio Morishita

Mitsuo Mori

Yoshiharu Yasui

Yoshihisa Suzuki

Kazuo Seiki

Hidejiro Araki

Katsumi Nakane

Takuzo Tooka

Haruyoshi Nakamura

Atsuo Sakakibara

Katumi Nakane

An inner rotor 5 has a recess 7 formed at a position corresponding to a navel 6 and the recess 7 has a taper surface 7a formed to the peripheral edge thereof. The end surface 6c of the navel 6 can be moved together with a support member 12 to an ordinary spinning position where it can be engaged with a thread Y drawn out through a thread guide and to a thread piecing position where it cannot be engaged therewith. When the thread is pieced, the navel 6 is disposed at the thread piecing position and after a seed thread is introduced into an outer rotor 2 from a thread drawing-out path 6b in the state that both the rotors 2, 5 are rotated, a fiber bundle in a fiber collecting portion 2a is drawn out together with the seed thread and a thread is spun without passing through the thread guide. Thereafter, the navel 6 is moved to the ordinary spinning position. While the navel 6 is being moved, the end surface 6c thereof is engaged with the thread Y which is introduced into the thread guide opened on the opening side of the outer rotor 2, so that operation proceeds to ordinary spinning. With this arrangement, the extreme end of the seed thread is caused to securely reach up to the fiber bundling unit of the outer rotor in thread piecing, whereby a spinning state in the thread piecing can smoothly proceed to the ordinary spinning state.

Thread piecing method for rotor type open end spinning frame and

A drafting device for a spinning machine, in which a plurality of loading devices for top rollers is provided, by which each top roller is held in a weighting arm in such a state as being displaceable independently from the other roller without disturbing the drafting operation of the other rollers. By this, a yarn piecing operation in a fasciated yarn spinning system can easily be carried out.

Drafting means for textile machine such as spinning machine

This invention is applicable for carrying out the doffing operation of several types of fly frames such as a fly frame provided with an upper rail having a plurality of flyers in suspended condition and a mechanism for driving these flyers therein, and a fly frame provided with a spindle rail and a bobbin rail disposed at a position above the spindle rail in such a condition that the bobbin rail can be displaced vertically during the building motion. According to the doffing method of the present invention, when it is required to carry out the doffing operation, the bobbins containing a full yarn package are relatively displaced to a position free from the corresponding flyers and the engagement of the bobbins with the corresponding bobbin driving mechanisms is released. Next the bobbins containing a full yarn package are carried toward a longitudinal end of the fly frame in a space above the arrangement of the bobbin driving mechanisms. In the preferable embodiment of the present invention, the carrying passage of the bobbin coincides with an alignment of the axial centers of the flyers arranged in the longitudinal direction of the fly frame. A chain conveyer is preferably used for carrying the bobbins. When the bobbin are carried to a longitudinal end of the fly frame, they are discharged from the fly frame. A fresh bobbin supplying device for supplying bobbins to the chain conveyer can be satisfactorily used.

Method and apparatus for doffing full packaged bobbins in a fly frame

A method and device are disclosed for cutting a rove at doffing in a flyer frame, wherein during the normal winding operation thereof the rove drawn out from front rollers is passed through the center hole of a flyer top, the hole of a hollow leg of a flyer, and over a presser and wound on a driven bobbin which is arranged on a bobbin rail moving up and down along the bobbin guide arbor of the flyer. Just before the doffing, the supply of the rove from the front rollers is failed and the bobbin and the flyer are caused to continue rotations substantially at the same speed for a time period sufficient to allow a predetermined number of rotations of both the bobbin and flyer, whereby the rove between the flyer top and the front rollers is subject to a stronger twist than that given during the normal winding operation. This assures that the rove is always cut of itself at an optimum portion thereof at the doffing.

Method and device for cutting rove at doffing in flyer frame

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Kariya, Japan

Toshio Morishita