Gripper and weft insertion device for a rapier loom

Abstract

The gripper comprises a housing (1), an actuator (2), a thread clamp (3) and a connecting section (11) for a gripper band. The actuator can be operated electrically and controlled via induction coils (71) in such a way that the clamping force and the clamping cycle of the thread clamp are adjusted in accordance with the physical and / or textile data of the weft to be inserted.

Description

technical field [0001] The invention relates to a gripper for a gripper loom and a weft insertion device with the gripper. Background technique [0002] For the weft laying, either a gripper is used to guide the weft thread through the shed, or a feed gripper and a pick-up gripper are used, from which the weft yarn is transferred to a pick-up gripper inside the shed. The gripper has actively (ie forcibly) controlled thread grippers outside the shed in the first mentioned configuration and inside the shed in the second mentioned configuration. In order to achieve this purpose, mechanical or electromechanical devices (GB2059455A) are used, and the operating parts for opening and closing the yarn clamps are arranged outside or below the shed. Especially in the case of yarn transfer inside the shed, this essentially leads to the following disadvantages. [0003] If a mechanical device is used, in order to operate the thread clamp, the operating member must be introduced betwee...

AI Technical Summary

Problems solved by technology

[0016] 2) High failure rate;

[0017] 3) reduced performance, and

[0018] 4) High cost

The complexity and size of the electromagnetic drive mechanism prevents one of ordinary skill in the art from locating it in the gripper housing

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