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

A method for producing a wire connection sleeve (10;

• 50), comprising:
• providing a conductive sheet material (P) formed with projections and recesses (33;
• 60;
• 70;
• 71;
• 80;
• 90;
• 100);
• winding the sheet material (P) into an inner tube (30;
• 51) with open ends;
• inserting the inner tube (30;
• 51) into an outer tube (20);
• and
• squashing a longitudinal intermediate part of the outer tube (20) to form a cross-sectionally small inner-tube portion (32) in an intermediate part of the inner tube (30;
• 51) that is cross-sectionally smaller than the open ends of the inner tube (30;
• 51) and forming a cross-sectionally small outer-tube portion (22) engaged with the inner tube (30;
• 51) in a longitudinal direction (LD) substantially in a part of the outer tube (20) located outside the cross-sectionally small inner-tube portion (32).

A wire connecting method for connecting first and second wires (W), the method comprising:

• providing a wire connection sleeve (10;
• 50) with an outer tube (20), an inner tube (30;
• 51) in the outer tube (20), projections or recesses (33;
• 60;
• 70;
• 71;
• 80;
• 90;
• 100) being formed on an inner surface of the inner tube (30;
• 51), opposite first and second ends of the inner tube (30;
• 51) being open and a longitudinal intermediate part of the inner tube (30;
• 51) being squashed to define a cross-sectionally small inner-tube portion (32) that is cross-sectionally smaller than the open first and second ends of the inner tube (30;
• 51);
• inserting a conductor (W1) of the first wire (W) into the first open end of the inner tube (30;
• 51);
• inserting a conductor (W1) of the second wire (W) into the second open end of the inner tube (30;
• 51);
• and
• crimping the wire connection sleeve (10;
• 50) so that the projections or recesses (33;
• 60;
• 70;
• 71;
• 80;
• 90;
• 100) of the inner tube (30;
• 51) securely engage the conductors (W1) of the respective first and second wires (W)