A wire connection sleeve, a wire connection sleeve producing method, a repair wire preconnected with a wire connection sleeve by crimping and a wire connecting method

摘要

An object of the present invention is to provide a wire connection sleeve, a wire connection sleeve producing method, a repair wire pre-connected with a wire connection sleeve by crimping and a wire connecting method which can improve connection reliability at connected parts of wires. A wire connection sleeve includes a pipe-like outer tube 20 and an inner tube 30 inserted inside this outer tube 20. The inner tube 30 is formed by winding a sheet-like metal material P formed with projections or recesses into a tubular shape with both ends being open, and a longitudinal middle part of this inner tube 30 serves as an inner-tube small-diameter portion 32 which is so squashed or deformed that the opening size thereof is smaller than those of the opposite longitudinal ends. Thus, connection reliability at connected parts of wires W can be improved.