Cable arrangement for robot arm, and industrial robot utilizing the same

Abstract

A rotary arm 2 along which cables 8 and 43 are made to run, has a support member 35 in a rotary shaft body 7 positioned in its base end part. An inserting hole 36 for passing the cables is formed in its support member 35. Its whole opening surface is imparted to a position offset from the rotational axis 2a of the rotary arm 2. A rocking shaft is operated in a tip part of the rotary arm 2, and even if the cable 8 is bent large, the influence of its bending on the upstream side of the cable is minimized. To improve feeding stability and durability of a welding wire by minimizing an influence on an upstream side torch cable, by maintenance of a bending state in a joint and repetition of bending operation.

Description

technical field

[0001] The present invention relates to an arrangement structure of cables and the like of a robot arm and an industrial robot equipped with the same. Specifically, it relates to, for example, a multi-joint type arc welding robot that, even if the torch cable is shortened, the position of the welding torch In any case, the supply speed and the stability of the supply amount of the welding wire can also be improved to achieve the required welding quality, and it is possible to realize the suppression of the loss of the welding torch cable and the arrangement structure of the cable and the like to expand the operating area of ​​​​the robot and possess It's industrial robots. Background technique

[0002] An arc welding robot that feeds a welding wire (consumable electrode) pulled out from a wire reel or the like to a welding torch, melts it with electric energy, and performs continuous welding is equipped with a wire feeder that feeds the wire. The welding wir...

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