Abstract: A joining method of electric wires includes peeling off an insulation sheath of each of a plurality of electric wires at a part of each of the electric wires to expose core wires having been twisted of each of the electric wires, untwisting the exposed core wires of each of the electric wires, and joining untwisted core wires of the electric wires together in a bundle.

Abstract: The present disclosure relates to a joining method for a terminal-equipped electric wire in which a plurality of terminal-equipped electric wires including a first terminal-equipped electric wire and a second terminal-equipped electric wire are joined each other. The joining method includes a first step of placing at least a conductor core wire of the first terminal-equipped electric wire among the plurality of terminal-equipped electric wires on a horn and crushing the conductor core wire of the first terminal-equipped electric wire by the horn and an anvil, and a second step of placing a conductor core wire of at least the second terminal-equipped electric wire among the plurality of terminal-equipped electric wires on the crushed conductor core wire and ultrasonically joining the conductor core wires by the horn and the anvil.

Abstract: A terminal includes: a tubular box portion to receive a mating terminal; a spring portion extending in a beam shape from a front end portion of the box portion; and a pressing piece configured to restrict a bending range of the spring portion. A free end of the spring portion is inside the box portion, and the spring portion has a contact point with the mating terminal. The pressing piece is placed at a pressing position located inside the box portion and away from the contact point in the bending direction. The pressing piece is configured to restrict the bending range of the spring portion to achieve at least part of the spring portion closer to the free end than the contact point is located on the bending direction side with respect to the pressing position.

Abstract: A terminal includes: a tubular box portion to receive a mating terminal; a spring portion extending in a beam shape from a front end portion of the box portion; and a pressing piece configured to restrict a bending range of the spring portion. A free end of the spring portion is inside the box portion, and the spring portion has a contact point with the mating terminal. The pressing piece is placed at a pressing position located inside the box portion and away from the contact point in the bending direction. The pressing piece is configured to restrict the bending range of the spring portion to achieve at least part of the spring portion closer to the free end than the contact point is located on the bending direction side with respect to the pressing position.

Abstract: A manufacturing method of a crimping terminal includes a terminal supply step of supplying the crimping terminal to a crimping position with a wire by a terminal supply device, the crimping terminal including a terminal connection portion, a wire connection portion to be crimped onto the wire, and a joint portion linking side walls of the terminal connection portion and the wire connection portion, a support step of supporting a bottom portion of the crimping terminal supplied to the crimping position by a first mold, a crimp step of deforming the wire connection portion while relatively moving toward the first mold, and crimping the wire connection portion onto the wire by a second mold, and a regulation step of regulating a width of the joint portion so as not to be wider than a width of the terminal connection portion, by sandwiching the joint portion from both sides in a width direction when the second mold crimps the wire connection portion by a regulation portion.

Abstract: A method of manufacturing a crimping terminal includes a punching process of punching out a crimping terminal from a flat-plate-shaped metal base material, an attaching process of attaching a sheet-like water stop member to a wire connection portion being a portion in the crimping terminal that is to be crimped onto a wire, and a bending process of bending the wire connection portion to which the water stop member is attached. The wire connection portion may integrally cover a core wire and a covering of the wire by being crimped onto the wire.

Abstract: A terminal crimping apparatus includes a terminal supply device configured to supply a terminal chain member including a plurality of crimping terminals, a first mold including a first edge portion provided at one end of a supporting surface supporting the crimping terminals, a second mold configured to crimp the crimping terminal onto a wire by sandwiching the crimping terminal between the second mold and the supporting surface, and a terminal cutting member including a second edge portion. The terminal cutting member cuts a boundary with the crimping terminal in a link portion using the second edge portion.

Abstract: A crimp terminal included in a wire harness includes an electrical connecting portion, a conductor caulking portion, and a coat caulking portion. The conductor caulking portion includes a first base to which the electrical connecting portion is joined at one side in an axial direction and to which the coat caulking portion is joined at the other side, and a pair of first barrel pieces that extend from the first base and wrap the conductor of the wire between the first base and the pair of first barrel pieces and caulked. The pair of first barrel pieces include bell-mouth portions at end portions close to the coat caulking portion. The first base has a first protrusion at a position facing base ends of the bell-mouth portions across the conductor, having a recessed portion on the conductor side and protruding away from the conductor, and extending in a crossing direction.

Abstract: A terminal crimping apparatus includes a terminal supply device configured to supply a terminal chain member including a plurality of crimping terminals, a first mold including a first edge portion provided at one end of a supporting surface supporting the crimping terminals, a second mold configured to crimp the crimping terminal onto a wire by sandwiching the crimping terminal between the second mold and the supporting surface, and a terminal cutting member including a second edge portion. The terminal cutting member cuts a boundary with the crimping terminal in a link portion using the second edge portion.

Abstract: A manufacturing method of a crimping terminal includes a terminal supply step of supplying the crimping terminal to a crimping position with a wire by a terminal supply device, the crimping terminal including a terminal connection portion, a wire connection portion to be crimped onto the wire, and a joint portion linking side walls of the terminal connection portion and the wire connection portion, a support step of supporting a bottom portion of the crimping terminal supplied to the crimping position by a first mold, a crimp step of deforming the wire connection portion while relatively moving toward the first mold, and crimping the wire connection portion onto the wire by a second mold, and a regulation step of regulating a width of the joint portion so as not to be wider than a width of the terminal connection portion, by sandwiching the joint portion from both sides in a width direction when the second mold crimps the wire connection portion by a regulation portion.

Abstract: A method of manufacturing a crimping terminal includes a punching process of punching out a crimping terminal from a flat-plate-shaped metal base material, an attaching process of attaching a sheet-like water stop member to a wire connection portion being a portion in the crimping terminal that is to be crimped onto a wire, and a bending process of bending the wire connection portion to which the water stop member is attached. The wire connection portion may integrally cover a core wire and a covering of the wire by being crimped onto the wire.

Abstract: A crimp terminal included in a wire harness includes an electrical connecting portion, a conductor caulking portion, and a coat caulking portion. The conductor caulking portion includes a first base to which the electrical connecting portion is joined at one side in an axial direction and to which the coat caulking portion is joined at the other side, and a pair of first barrel pieces that extend from the first base and wrap the conductor of the wire between the first base and the pair of first barrel pieces and caulked. The pair of first barrel pieces include bell-mouth portions at end portions close to the coat caulking portion. The first base has a first protrusion at a position facing base ends of the bell-mouth portions across the conductor, having a recessed portion on the conductor side and protruding away from the conductor, and extending in a crossing direction.