Textiles: spinning – twisting – and twining – Apparatus and processes – Threading up
Patent
1987-06-05
1988-11-08
Petrakes, John
Textiles: spinning, twisting, and twining
Apparatus and processes
Threading up
57 5883, 57 5886, 242147R, 242149, D01H 1310, D01H 786, B65H 5922
Patent
active
047826533
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a device for displacing a tenser in a two-for-one twister in which a tension applying device is installed within a center hole of a yarn supply package.
2. Description of the Related Art
A two-for-one twister houses therein a tension applying device. That is, in a tension device installed within a center hole of a yarn supply package, a capsule type or a spherical tenser is provided in part of a yarn passing hole, and tension is applied to a yarn while nipping the yarn under constant pressure between the tenser and the tenser supporting member.
In case of such a tension device, in threading operation, it is necessary to displace the tenser from a yarn passage to provide freedom without any abstacle in the yarn passage. Where threading is carried out by a guide means such as flexible nylon, or where threading is carried out by air stream, it is necessary to displace the tenser to a position not to cutoff an air stream passage.
Various tenser displacing devices have been proposed. However, some of these devices are inconvenient in positiveness of displacement of the tenser. That is, a tenser is displaced by compressed air; a push rod having a tapered end is inserted into a yarn guide hole to directly and forcibly displace the tenser; or a pin is projected from a cylindrical side to forcibly move the pin in a lateral direction. However, these proposals have disadvantages such that in case of using the compressed air, there involves inaccuracy in operation due to variation in air pressure and air leakage; in case of inserting the displacing push rod, the operation is cumbersome; and in case of pushing a pin from the side, the directivity of operation need be determined.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a device for displacing a tenser positively to a predetermined position by an extremely simple operation.
According to the device for displacing a tenser of an embodiment of the present invention, the tenser is held between a lower supporting member secured within a tenser housing and an upper supporting member inserted into the housing and secured to a vertically movable yarn guide pipe, a cam member formed in the outer periphery with a cam groove in engagement with a pin projected into the housing to locate upper and lower position of the yarn guide pipe is provided in axial position of the yarn guide pipe, said yarn guide pipe being urged by a spring in an axial direction of the yarn guide pipe, and a magnet for attracting and holding the tenser at a position displaced from a yarn running area is provided in part of the housing.
According to an embodiment of the present invention, the yarn guide pipe is pushed against the force of a spring to bring the cam member into engagement with the pin so that the cam member may be moved up and down integral with the yarn guide pipe, and when a spacing between the upper and lower supporting members, the tenser present therebetween is attracted and held by the magnet on the side to form a threading passage.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front view in section showing an embodiment of a device according to the present invention;
FIG. 2 is a developed front view showing a cam groove of a cam member;
FIGS. 3-A, 3-B, 3-C and 3-D is a view for explanation of operation showing the engaging relationship between a cam groove and a pin;
FIG. 4 is a front view in section showing the state wherein a tenser is attracted on a magnet;
FIG. 5 is a sectional view taken on line V--V of FIG. 1; and
FIG. 6 is a sectional view taken on line VI--VI of FIG. 4.
DESCRIPTION OF THE PREFERRED EMBODIMENT
An embodiment of the present invention will be described hereinafter with reference to the drawings.
In FIG. 1, a tenser device 3 is mounted on a support pipe 2 on a stationary disk 1 of a two-for-one twister. A yarn supply package 4 is placed on the stationary disk 1, and the tenser device 3 is inserted into a take-up tube 5 of the yarn supply pa
REFERENCES:
patent: 4281508 (1981-08-01), Frentzel-Beyme
patent: 4287712 (1981-09-01), Franzen
patent: 4355500 (1982-10-01), Yanobu et al.
patent: 4357792 (1982-11-01), D'Agnolo et al.
patent: 4377065 (1983-03-01), Yanobu
patent: 4391090 (1983-07-01), Charbonnier
patent: 4453377 (1984-06-01), Inger et al.
patent: 4642980 (1987-02-01), Fukunaga et al.
Murata Kikai Kabushiki Kaisha
Petrakes John
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