Stopping method used in coupling and de-coupling heddles in Jacquard loom, employs piezoelectric- or magnetic actuation with two offset stopping planes at different levels

摘要

In systems with magnetically-assisted coupling, also known as magnetic actuators, and/or with piezoelectrically-assisted coupling, also known as piezoelectric actuators, where optionally a space saving arrangement is adopted in double construction, i.e. two actuators are arranged directly one above the other, at least two stopping unit planes are arranged with offset, one above the other. Electromagnets (23) with flap armatures (24) and stop rods or pressure rods (29) decoupled from the flap armature (24) and/or electromagnets (31), work together with plate armatures (32) and stop rods (33) or pressure rods, and/or electromagnets (55, 56) with self-sprung heddles (4) as magnetic armatures. Corresponding piezoelectric implementations are detailed in accordance with the foregoing principles. Flexural piezoelectric actuators take the form of laminates, stacks, tubes or flexural panels.