Importance

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Abstract

In a negative double lift dobby machine, a balance lever 8 is pivotally attached to a jack-lever, and driving members 16, 17 disposed respectively in front of upper and lower ends of the balance lever 8 reciprocate in opposite phases with each other. Driven hook levers 10, 11 are pivotally attached to the upper and lower ends of the balance lever 8, and driving hook levers 18, 19 opposite to the driven hook levers 10, 11 are pivotally attached to the driving members 16, 17. Command levers rotate the driving hook levers 18, 19 to be engaged with the driven levers 10, 11 respectively. Flat surfaces 10b, 11b constituted in the driven hook levers 10, 11 respectively push stoppers 12, 13 under surface contact state. When the driven hook levers 10, 11 begin to be pulled by the driving hook levers 18, 19 respectively, the driven hook levers 10, 11 are moved in perpendicular direction to the flat surfaces 10b, 11b, engaging portion of the driven hook lever 10 with the driving hook levers 18 is on the ine connecting between pivotal centers of both hook levers 10 and 18, engaging portion of the driven hook levers 11 with the driving hook levers 19 is on the line connecting between pivotal centers of both hook levers 11 and 19, and rocking center of the pivotal portion of the jack lever 5 with the balance lever 8 is disposed above or below the rotation axial center of the jack-lever 5 on the vertical line passing through the axial center.

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First Claim