Textiles: knitting – Needle cooperating elements – Sinkers or web holders
Patent
1998-09-15
2000-01-18
Calvert, John J.
Textiles: knitting
Needle cooperating elements
Sinkers or web holders
66 64, 66109, D04B 1506
Patent
active
060148748
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a yarn guiding apparatus for guiding a yarn supplied to a needle of a flat knitting machine to a predetermined position on the front face or the rear face of the needle.
BACKGROUND ART
A yarn guiding apparatus wherein yarn holding members, each having a pushing down edge at an end portion thereof for pushing down a yarn, are provided for advancing and retreating movements between a plurality of needles and sinkers provided in rows such that, when each of the yarn holding members is advanced, such yarn holding member can be engaged with a yarn being supplied to a needle from a yarn carrier or already knitted and extending between needles and positioned, when a needle is advanced, such yarn into a hook or to the rear face of the needle developed by the applicant of the present application and disclosed in Japanese Patent Laid-Open No. Hei 8-13293.
However, where such a yarn holding member, as disclosed in the specification mentioned above, is itself moved forwardly and backwardly, in a horizontal direction, to engage a yarn pushing down operating edge, provided obliquely at an end thereof with a yarn to push down the yarn to a predetermined position, a sliding resistance is produced, between them and unnecessary tension is applied to the yarn. In order to push down the yarn to the predetermined position, it is necessary to either make the stroke of the yarn holding member large, or make the inclination angle large, to make the pushed down amount of the yarn large. However, if the latter is adopted, in order to make the knitting machine compact, then the inclination angle of the yarn pushing down acting edge must be made large, and a high resistance is applied to the yarn, when the yarn is pushed down. Further, the yarn which is engaged with the operating edges of left and right yarn holding members is pushed down in a condition bent in a zigzag condition while the yarn is kept taut. Consequently, in such a situation, the yarn is kept in a position higher than the aimed pushed down position and cannot be pushed down to the aimed position. This is likely to occur where a yarn does not slip well or when the knitting speed is high. Therefore, it is desired to prevent a high sliding resistance from being supplied to a yarn, when the yarn guide member pushes down the yarn.
Taking the foregoing into consideration, it is an object of the present invention to provide a yarn guiding apparatus which can guide a yarn without making advancing and retreating movements of a yarn guiding member for guiding a yarn into a hook of a needle, or to the rear face of a needle in a horizontal direction large and can guide the yarn, when an operating edge at an end of the yarn guiding member is engaged with and pushes down the yarn, in such condition that the yarn is slidably moved and a high resistance is not applied to the yarn.
DISCLOSURE OF THE INVENTION
According to the present invention, parallel to needles and sinkers provided on at least one pair of needle beds, having head portions opposed to each other with respect to the center of knock-over edge portions, yarn holding members, each having a yarn pushing down operating edge at an end thereof, are supported for sliding movement toward the knock-over edge portions, and yarn holding member deflection means is provided, for moving each of the yarn pushing down operating edges downwardly during sliding advancement of the yarn holding member. Consequently, because the yarn pushing down advancing and retreating movements of the operating edge of each of the yarn holding members are a combination of movements in a horizontal direction and movements of a vertical direction, such that, the yarn pushing down operating edge is pivoted downwardly while it such operating edge moves and passes above a yarn or, after a horizontal movement, the yarn holding down operating edge first keeps a most advanced position and then is moved downwardly, when the yarn pushing down operating edge is to be engaged with and push down a yarn, the yarn push
REFERENCES:
patent: 5305618 (1994-04-01), Yabuta
patent: 5333473 (1994-08-01), Miyamoto
patent: 5557948 (1996-09-01), Shima et al.
Shima Masahiro
Sonomura Minoru
Calvert John J.
Shima Seika Mfg., Ltd.
Worrell Jr. Larry D.
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