Device for carrying out the programming of rotary dobbies in weaving machines
A dobby, rotary technology, applied in the direction of dobby, textile, textile and paper making, to achieve the effect of weakening the impact
Inactive Publication Date: 2010-09-22
IP FIRST
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Problems solved by technology
[0006] The dobby programming device known for a long time in the prior art has recently been improved by various important technical features which remove or reduce many of the disadvantages of the dobby programming device, such as for There is time to clear the previous selection and set a new selection for the next half-turn, requiring the spindle to stop every half-turn, and errors occur when the selection is performed "on time" at the centerline of the motion profile high probability
Method used
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[0018] The invention will be described in detail, by way of example only, with reference to its preferred embodiments which are schematically shown in the accompanying drawings.
[0019] As shown, the device of the invention is part of a dobby comprising a rotating shaft 1 on which is wedged a connecting rod element 2 shaped to have a Projection 2A pivotally connected at 3A to the operating lever 3 of the corresponding heald frame QL, and has a substantially circular ring 2B at the relative position of the ring 2B perpendicular to the diametrical direction of the longitudinal axis of the connecting rod element 2 There are two pins 2C.
[0020] A bearing 4 is inserted in the middle of the connecting rod 2, on the inner element of the bearing 4 is fitted an eccentric ring 5, which is able to rotate relative to the shaft 1, as can be further seen.
[0021] On the eccentric ring 5, a rocker 7 (or starting lever, or selection lever) capable of vibrating is mounted by a rivet 6 or ...
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The present invention provides a device to carry out the programming of rotary dobbies to operate the heald frames in weaving machines, of the type in which the control rods (3) of the heald frames (QL) are actuated by connecting rods (2) each mounted on an eccentric ring (5) rotating with respect to the main shaft (1) of the dobby, which further comprises a selection lever (7) pivoted on said eccentric ring (5) and an operating lever (16) with projecting end profiles co-operating with said selection lever (7), in which said profiles are manufactured each in the shape of a tooth (17, 18) pivoted at the corresponding end of said lever (16) in a recess having two diverging abutting walls (17A, 17B, 18A, 18B) and maintained in contact with one of them (17A, 18A) by spring means (19, 20), so as to be able to oscillate up to contacting the other (17B, 18B), with said spring means dampening the impact against the profiles themselves of the selection lever (7) each time that - during the usual forward running mode of the loom at steady speed - said profiles arrange themselves along the engagement trajectory of the selection lever (7).
Description
technical field [0001] The present invention relates to a selection device for executing a setting program of a rotary dobby for manipulating heald frames in a weaving machine. Background technique [0002] As we all know, the positioning of the heald frames in the loom affects the shape of the weft yarn in the finished fabric. The positioning of the heald frames must be set according to a predetermined order. Location. [0003] In order to achieve the alternate opening and closing of the shed entry formed by the warp threads, while allowing the insertion of the weft threads, the heald frames must therefore occupy a high and a low position, carrying the corresponding warp threads during this movement. In order to convert the rotational movement of the main shaft into an alternating translational movement of the heald frames, weaving machines are used, in particular "dobbies", in which suitable eccentric rings operate the movement of the individual heald frames by means of a...
Claims
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IPC IPC(8): D03C1/00
CPCD03C1/00
Inventor G·L·克雷蒙尼西I·赛尔图里尼
Owner IP FIRST