Crimp-connection structural body, wire harness, method of manufacturing crimp-connection structural body, and device of manufacturing crimp-connection structural body

A method of manufacturing a crimp-connection structural body comprising:

• an insulated wire formed by covering a conductive conductor by an insulating cover having insulation property;
• and a crimp terminal having a crimp section which allows connection by crimp of a conductor exposed portion formed by exposing the conductor by removing at least a portion of the insulating cover in a vicinity of a distal end of the insulating cover to the crimp section, wherein the conductor exposed portion is connected to the crimp section by crimp the conductor exposed portion by the crimp section, wherein
• the method sequentially performs:
• an insertion step of inserting at least the conductor exposed portion into a closed-barrel-type crimp section having an approximately cylindrical shape and extending in a long length direction of the insulated wire;
• and
• a crimp step of forming a cross-sectional shape of the crimp section in a radial direction into an approximately recessed cross-sectional shape and crimp the conductor exposed portion and the crimp section to each other such that a crimp recessed portion having two inclined portions inclined inward from positions of the crimp section spaced apart from each other by a distance which is 60% to 80% inclusive of an entire width of the crimp section in an approximately horizontal direction is formed by indenting the crimp section while setting an opposedly facing angle made by the two inclined portions of the crimp recessed portion to a value which ranges from 30° to 60° inclusive.

A device of manufacturing a crimp-connection structural body including:

• an insulated wire formed by covering a conductive conductor by an insulating cover having insulation property;
• and a crimp terminal having a crimp section which allows connection by crimp of a conductor exposed portion formed by exposing the conductor by removing at least a portion of the insulating cover in a vicinity of a distal end of the insulating cover to the crimp section, wherein the conductor exposed portion is connected to the crimp section by crimp the conductor exposed portion by the crimp section, the device comprising:
• an inserting means which inserts at least the conductor exposed portion into a closed-barrel-type crimp section having an approximately cylindrical shape and extending in a long length direction of the insulated wire;
• and
• a crimp means which forms a cross-sectional shape of the crimp section in a radial direction into an approximately recessed cross-sectional shape and crimp the conductor exposed portion and the crimp section to each other by forming the crimp section such that a crimp recessed portion having two inclined portions inclined inward from positions of the crimp section spaced apart from each other by a distance which is 90% or less of an entire width of the crimp section in an approximately horizontal direction is formed by indenting the crimp section while setting an opposedly facing angle made by the two inclined portions of the crimp recessed portion to a value which ranges from 10° to 120° inclusive.