Claims
- 1. In a circular knitting machine comprising an axis of rotation, a needle cylinder provided with needles adapted to receive knitting yarn, cam sections for regulating the movement of said needles, a support for said cam sections, stripers and a common yarnguide from which the yarn may run to the needle, a striping system comprising at least two yarnguide rods, each being provided with a yarn notch, each rod being capable of pivoting between a first position away from said axis of rotation and a second position towards said axis of rotation;
- a first spring for each yarnguide rod urging it to said first position;
- a support member associated with each yarnguide rod and fixedly attached to a gripper member for retaining the yarn and with a shears member for cutting said yarn, said support member being provided with first means to be pushed downwardly and second means to be pushed upwardly, and being adapted to slide along the rod between a first lower position in which the gripper member retains the yarn and a second upper position in which the gripper member does not retain the yarn, said shears member being adapted to cut the yarn on moving from said second to said first position;
- a guide plate for each yarnguide rod, provided with a lower contour in which there is provided a recess for guiding the yarn between the infeed yarnguide and the common yarnguide;
- a moving cam, adapted to pick up the yarn retained in a yarnguide rod when the latter is in said second position thereof, such that the yarn slides along said lower contour to reach said recess, be inserted in the common yarnguide and be captured by the needle;
- a pivoting mechanism for pivoting each yarnguide rod comprising a last rocking lever having an end;
- a selection device for actuating the pivoting mechanisms;
- a closing mechanism to lead said support member to said first lower position; and
- an opening mechanism to lead said support member to said second upper position.
- 2. The system of claim 1, said selection device comprising:
- a slide member for each pivoting mechanism, which is adapted to slide between a retracted position and an extended position, which is housed in a slot and is provided with: a tail portion capable of being depressed into the slot against the urging of a second spring; a rear engagement surface; an upper engagement surface; a front engagement surface; an upper butt and a recess in which there is inserted said end of said last rocking lever with a clearance therebetween, such that a sliding movement of the slide member from said retracted position of a magnitude greater than said clearance, causes said last rocking lever to rock and the actuation of said pivoting mechanism;
- a single selection box which, for each slide member, comprises a selector adapted to occupy a retracted inoperative position or an extended operative position in which it engages said upper butt, causing the slide member to slide over a first distance of a magnitude of the order of said clearance;
- a first axial cam engaging said upper engagement surfaces of said slide members, causing the depression of said tail portion when the slide members have not moved over said first distance;
- a first radial cam engaging said rear engagement surfaces when said tail portions have not been depressed; and
- a second radial cam engaging said front engagement surfaces to return the slide members to said retracted position.
- 3. The system of claim 1, wherein said closing mechanism is provided with a first rocking arm pivotably connected to a closing lever which, on the one hand, is adapted to slide between a first retracted position to which it is urged by a third spring and a second, extended position and, on the other hand it is also adapted to pivot between an inoperative position, to which it is urged by a fourth spring, and an operative position to which it is led by the pivoting of any yarnguide rod to the second position thereof towards said axis of rotation, said closing lever having a terminal edge which, when the closing lever has been pivoted to the operative position thereof and is slid towards the extended position thereof, engages said first means of said support member, leading it to the first lower position thereof.
- 4. The system of claim 3, wherein said first rocking arm of said closing mechanism is engaged by a first pusher which in turn is engaged by a second axial cam, whereby the said closing lever is slid to the extended position thereof.
- 5. The system of claim 1, wherein said opening mechanism be provided with a second rocking arm pivotably attached to an opening lever which is adapted to slide between a low position to which it is urged by a fifth spring and a high position, said opening lever having an inner operative edge which, when the lever slides from said low position to said high position, is adapted to engage said second means of said support member, when the yarnguide rod corresponding to the support member is in the second position thereof towards the axis of rotation.
- 6. The system of claim 5, wherein said second rocking arm of said opening mechanism is engaged by a second pusher which in turn is engaged by a third axial cam, whereby said opening lever is slid to the high position thereof.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8703484 |
Dec 1987 |
ESX |
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Parent Case Info
This is a continuation of copending application Ser. No. 07/279,070 filed on 12/2/88, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4656842 |
Sawazaki |
Apr 1987 |
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Foreign Referenced Citations (2)
Number |
Date |
Country |
2805779 |
Aug 1978 |
DEX |
481545 |
Jul 1980 |
ESX |
Continuations (1)
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Number |
Date |
Country |
Parent |
279070 |
Dec 1988 |
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