Device for forming shed and jacquard loom equipped with such device

Abstract

#CMT# # / CMT# The device has a series of knives operated by an upper knife box (C1) and a lower knife box, and equipped with a guiding system. The system has a connecting rod (202) articulated around a first axis. The system is independent from knife box driving rods, and comprises levers (204, 206) respectively articulated on a connecting rod around second and third axes. The levers are articulated on supports of the device around fourth and fifth axes, respectively. The fourth and fifth axes are located on both sides of a vertical straight line secant with the first axis, where the axes are parallel. #CMT#USE : # / CMT# Device for forming a weaving shed on a Jacquard-loom (claimed). #CMT#ADVANTAGE : # / CMT# The device permits efficient vertical guiding of the knife boxes, without requiring a system that uses lubrication and increasing the encumbrance of the knife box guiding kinematics. The device ensures easy utilization and maintenance of the Jacquard-loom. #CMT#DESCRIPTION OF DRAWINGS : # / CMT# The drawing shows an end view of an upper knife box in lower position and its driving and guiding units located on a side of the knife box. C1 : Upper knife box 14 : Crosspiece 148 : Crosspiece end 202 : Connecting rod 204, 206 : Levers.

Description

technical field [0001] The present invention relates to a shed forming device on a jacquard type loom, and a jacquard type loom equipped with such a device. [0002] More specifically, the invention relates to vertically actuating in opposite phase two sets of gibs or blades used in Jacquard type looms to transmit vertical motion to hooks forming part of the weaving mechanism. In this type of loom, the hooks are arranged in rows and they are lifted alternately by said blades or griffes - also called "griffes" - each of which is itself supported by two One or the other of the cartridge supports. Each cartridge needs to be driven by vertical reciprocating motion in opposite phase to the other cartridge. Background technique [0003] For this purpose, it is known from FR-A-2669650 to use an input shaft driven by a continuous rotary movement and on which are mounted four eccentrics, each associated with a lever for controlling a rocker arm. The blade holder is suspended by co...

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