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AssigneeMaschinenfabrik Rieter AG
InventorsAdalbert Stephan, Marek Burysek
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The inventions relates to the method of yarn braking especially at renewal of spinning in a working position of an air jet spinning machine by means of attending a device provided with a vacuum tube (2), into which before commencement of braking there is the end of the yarn (100) sucked in, which at drawing off from the vacuum tube (2) is braked between the braking surfaces of a stationary brake friction member (50) and a moving brake friction member (30), which are arranged on the attending device displaceably to the track of the yarn (100), while for generating the braking force the moving brake friction member (30) moves towards the stationary brake friction member (50) and it fits against it at a contact abscissa (301) or a contact surface (302). To generate the braking force on the moving brake friction member (30) the action force in the loading point (Y) and the reaction force in the stop point (X) is acting, whereas one of these points is to be found at the end of the moving brake friction member (30) lying opposite to the contact abscissa (301) or the contact surface (302) and the second is lying between this member and the contact abscissa (301) or the contact surface (302), while the action force is generated by means of the control member (4) and the reaction force is generated by means of the stop (6), against which the moving brake friction member (30) leans, so that the braking surface of the moving brake friction member (30) always abuts against the braking surface of the stationary brake friction member (5) along the whole length of their contact abscissa (301) or contact surface (302). The inventions also relates to the corresponding device.
Method of yarn braking especially at renewal of spinning in a working position of an air jet spinning machine by means of attending a device provided with a vacuum tube (2), into which before commencement of braking there is sucked in the end of the yarn (100), which at drawing off from the vacuum tube (2) is braked between the braking surfaces of a stationary brake friction member (5) and a moving brake friction member (30), which are arranged on the attending device displaceably to the path of the yarn (100), whereas for generating the braking force the moving brake friction member (30) moves towards the stationary brake friction member (5) and fits against it at a contact abscissa (301) or a contact surface (302), characterised in that to generate the braking force there is acting on the moving brake friction member (30) by the action force in the loading point (Y) and by reaction force in the stop point (X), wherein one of these points is located at the end of the moving brake friction member (30) lying opposite to the contact abscissa (301) or the contact surface (302) and the second is lying between this member and the contact abscissa (301) or the contact surface (302), wherein the action force is generated by means of the control member (4) and the reaction force is generated by means of the stop (6), against which the moving brake friction member (30) leans, so that the braking surface of the moving brake friction member (30) always abuts against the braking surface of the stationary brake friction member (5) along the whole length of their contact abscissa (301) or contact surface (302).
Method according to any of the previous claims, characterised in that the connecting line of the loading point (Y) and the stop point (X) divides the contact abscissa (301) or surface (302) into halves.
Method according to any of the previous claims, characterised in that both brake friction members (30, 40) in the unbraked position are to be found outside the space for braking, into which they transfer before commencement of braking.
Method according to any of the previous claims, characterised in that the control member (4) is formed by a pneumatic cylinder (40).
Device for braking of the yarn especially at renewal of spinning in working position of an air jet spinning machine by means of attending a device arranged displaceably along a line of work positions of the machine and provided with a vacuum tube (2) for sucking-in and subsequent releasing of the end of the yarn (100) for spinning-in, whereas to the mouth (21) of the vacuum tube (2) there are assigned the stationary brake friction member (50) and the moving brake friction member (30), wherein the stationary brake friction member (50) comprises a braking surface arranged across a path of the yarn (100), and the moving brake friction member (30) is formed by a plate (3) arranged under the stationary member (50) in a moving manner between its released and braking position, in which it abuts by its one end towards the braking surface of the stationary brake friction member (50) at the contact abscissa (301) or the contact surface (302), characterised in that to the moving brake friction member (30) the control member (4) and the stop (6) are assigned, wherein one of them abuts against the end of the moving brake friction member (30) being opposite to the contact abscissa (301) or the contact surface (302) to one side of the moving brake friction member (30) and the second abuts between the mentioned end and the contact abscissa (301) or the contact surface (302) to the opposite side of the moving brake friction member (30).
Dependencies are inferred from the claim text.