JP5051090B2 - Terminal crimping device - Google Patents

Description

  The present invention relates to a technique for crimping a crimp terminal to an electric wire.

  Crimping the crimping terminal to the electric wire is done by applying a large compressive load to the core wire crimping part with a crimping die while the exposed core part of the wire end is arranged on the core wire crimping part of the crimping terminal. This is done by plastically deforming the part. At this time, the core wire exposed portion can be accurately positioned with respect to the crimp terminal by performing the above crimping operation while the tip of the core wire exposed portion is brought into contact with the stopper disposed outside the core wire crimp portion.

  As a prior art related to the invention of the present application, for example, there is one described in Patent Document 1.

Japanese Patent Laid-Open No. 08-236254

  By the way, when crimping a crimp terminal to an electric wire having aluminum or an aluminum alloy as a core wire portion, in terms of its performance characteristics, compared with the case of crimping an electric wire having copper or a copper alloy as a core wire portion, crimping at high compression is possible. Necessary. However, if crimping is performed with high compression, the amount of elongation of the core wire portion increases. For this reason, as described above, if the crimping operation is performed while the tip of the core wire exposed portion is in contact with the stopper disposed outside the core wire crimping portion, the amount of core wire extension of the core wire exposed portion from the core wire crimping portion is increased. There is a problem that it gets bigger.

  Then, this invention aims at crimping | bonding a crimp terminal to an electric wire, making the extension amount of the exposed core wire part from the core wire crimp part of a crimp terminal as small as possible.

  In order to solve the above-mentioned problem, the terminal crimping apparatus according to the first aspect is a terminal crimping apparatus for crimping the core wire crimping portion of the crimp terminal to the exposed core wire portion of the electric wire end, and the core wire crimping portion can be placed thereon The core wire crimping part disposed on the lower mold between the lower mold and the lower mold by being relatively opposed to the lower mold and moved relative to the lower mold An upper mold for crimping the exposed core part to the exposed core part, a drive mechanism part for moving the lower mold and the upper mold relatively close to and away from each other, and the core crimping part placed on the lower mold A position restricting portion having a stopper provided so as to be movable between a restricting position capable of coming into contact with the tip of the exposed core portion and a retracted position retracted from a movement path of the lower die and the upper die. And moving in conjunction with the approaching / separating movement operation by the drive mechanism unit, and the approach by the drive mechanism unit An approaching / separating operation transmitting member that moves the stopper toward the retracted position in accordance with a moving operation, and moves the stopper toward the restricting position in accordance with a separating movement operation by the drive mechanism unit. It is.

  A second aspect is a terminal crimping device according to the first aspect, wherein the position restricting portion includes a stopper supporting portion that supports the stopper movably between the restricting position and the retracted position; A biasing member that biases the stopper toward the restriction position, and the approaching / separating operation transmitting member resists the biasing force of the biasing member in response to an approaching movement operation by the drive mechanism unit. A moving force for moving the stopper toward the retracted position is applied, and the moving force is released according to the separation movement operation by the drive mechanism unit, and the stopper is moved to the regulation position by the urging force of the urging member. It is intended to move towards.

  A third aspect is the terminal crimping apparatus according to the first or second aspect, wherein the stopper of the position restricting portion is arranged so that the restricting position and the retracting position are along an axial direction of the core wire crimping portion of the crimp terminal. It is provided to be movable between positions.

  According to the terminal crimping device according to the first aspect, the stopper is moved to the restriction position in accordance with the approaching movement operation by the drive mechanism unit, and the stopper is retracted in accordance with the separation movement operation by the drive mechanism unit. Since an approaching / separating motion transmitting member that moves to a position is provided, the position of the tip of the exposed core wire portion is regulated so as to be disposed on the core wire crimping portion, and then the relative relationship between the lower die and the upper die The core wire crimping portion is crimped to the exposed core wire portion by a close movement. Therefore, the amount of extension of the exposed core wire portion from the core wire crimp portion after crimping can be made as small as possible. Moreover, since the stopper has moved to the retracted position during crimping, the crimp terminal can be crimped to the electric wire without the stopper being in the way.

  According to the second aspect, the approaching / separating operation transmitting member moves the stopper toward the retracted position against the urging force of the urging member in accordance with the approaching / moving operation by the drive mechanism unit. In addition to applying a force and releasing the moving force according to the separation movement operation by the drive mechanism and moving the stopper toward the restriction position by the biasing force of the biasing member, the stopper moves to the retracted position. The moving operation can be ensured.

  According to the third aspect, the stopper of the position restricting portion is provided so as to be movable between the restricting position and the retracted position along the axial direction of the core wire crimping portion of the crimp terminal. It is possible to avoid interference between the stopper, the lower mold, and the upper mold, while relatively reducing the amount of movement.

  Hereinafter, the terminal crimping apparatus according to the embodiment will be described. 1 is a front view showing the terminal crimping device 20, FIG. 2 is a side view of the principal part of the terminal crimping device 20, FIG. 3 is a plan view of the principal part of the terminal crimping device 20, and FIG. FIG. 5 is a schematic explanatory view taken along line IV-IV, and FIG. 5 is a side view of a main part of the terminal crimping device 20 when performing a crimping operation.

  This terminal crimping device 20 is a device that crimps the core wire crimping portion 12 of the crimp terminal 10 to the exposed core wire portion 17 a at the end of the electric wire 16.

  Here, an example of the crimp terminal 10 and the electric wire 16 to be processed will be described.

  The electric wire 16 has a configuration in which an insulating coating portion 18 such as a resin is formed on the outer periphery of a core wire portion 17 which is a conductive wire linear member. Further, the insulating coating 18 is peeled off over a predetermined length at the end of the electric wire 16, and an exposed core portion 17 a having a predetermined length is formed at the end of the electric wire 16. The electric wire 16 suitable as a processing object by the terminal crimping device 20 is an electric wire 16 having a core wire portion 17 that is preferably crimped with high compression, such as aluminum or an aluminum alloy.

  The crimp terminal 10 is a member formed by punching and bending a metal plate such as a copper alloy plate, and has a configuration in which the coated crimp portion 11, the core wire crimp portion 12, and the connection portion 13 are linearly connected. Has been.

  The coated crimp part 11 is formed in a substantially U-shaped cross section on a surface substantially orthogonal to the longitudinal direction of the crimp terminal 10, and has a pair of coated crimp pieces 11 a on both sides. Then, in a state where the end portion of the insulating coating portion 18 of the electric wire 16 is disposed in the coated crimping portion 11, the coated crimping portion 11 is in front of the exposed core portion 17a by plastically deforming the pair of coated crimping pieces 11a inward. Thus, it is configured to be crimped to the end portion of the insulating coating portion 18. This covering crimping part 11 may be omitted.

  The core wire crimping portion 12 is formed in a substantially U-shaped cross section on a surface substantially orthogonal to the longitudinal direction of the crimp terminal 10, and has a pair of core wire crimping pieces 12a on both sides. Then, the core wire crimping portion 12 is crimped to the exposed core wire portion 17a by plastically deforming the pair of core wire crimping pieces 12a in the state where the exposed core wire crimping portion 12 is disposed in the core wire crimping portion 12. ing.

  The connection portion 13 is a portion configured to be connectable to a mating connection member, and is here formed in a substantially cylindrical shape and configured to be fitted and connected to a mating terminal member or the like. However, the connecting portion may be configured to be connectable to the mating connecting member, and may have a rod-like shape or an elongated plate-like shape according to the mating connecting member shape. It may be an annular shape that can be attached and connected.

  The terminal crimping device 20 includes a lower die 32 for covering and crimping and a lower die 36 for crimping a core, an upper die 42 for covering and crimping, an upper die 46 for crimping a core wire, a drive mechanism unit 50, and a position regulating unit 60. And an approaching / separating operation transmitting member 70.

  The lower die 32 for covering and crimping and the lower die 36 for crimping the core wire are members called anvils, and are fixedly mounted on the fixing member 22 so as to protrude upward.

  The upper end portion of the lower cover bonding die 32 is formed in an elongated bar-like portion, and a shallow groove-like lower pressure bonding die surface 32a that is curved in an arc shape is formed on the upper surface thereof.

  The upper end portion of the core wire crimping lower die 36 is formed in an elongated rod-like portion, and a shallow groove-shaped core wire crimping lower die surface 36a that is curved in an arc shape is formed on the upper surface thereof.

  The lower surface 32a for covering and crimping and the lower die surface 36a for crimping a core wire are provided so as to be connected in the same straight line, and the covering and crimping portion 11 of the crimping terminal 10 is connected to the lower die surface 32a for covering and crimping. The core wire crimping portion 12 is supported on the lower die surface 36a for core wire crimping.

  An electric wire guide member 34 is provided at a position adjacent to the lower die 32 for covering and crimping. A shallow groove-shaped guide groove 34 a that is curved in an arc shape is formed on the upper surface of the wire guide member 34. The guide groove 34a faces the end portion of the electric wire 16 toward the covering crimping portion 11 and the core wire crimping portion 12 of the crimping terminal 10 placed on the lower die surface 32a for covering crimping and the lower die surface 36a for core crimping. In addition to guiding, the electric wire 16 is configured to be placed in a mounting form before the crimp terminal 10.

  Further, a terminal auxiliary support portion 38 is provided adjacent to the lower die 36 for crimping the core wire. The terminal auxiliary support portion 38 supports the connection portion 13 portion of the crimp terminal 10 supported by the lower die 36 for crimping the core wire in a mounting manner. A concave portion 38a is formed in the terminal auxiliary support portion 38 below the approach / separation operation transmitting member 70, which will be described later, to avoid interference with the approaching / separating operation transmitting member 70 that descends.

  The upper crimping die 42 for covering and crimping and the upper die 46 for crimping the core wire are members also called crimpers, and are supported by the drive mechanism 50 so as to be suspended and movable up and down.

  The upper die 42 for covering and crimping is disposed above the lower die 32 for covering and pressing, and the insulating crimping portion 18 is connected between the upper die 42 for covering and pressing and the lower die 32 for covering and crimping. It is configured to be capable of being crimped to. More specifically, the upper die 42 for covering and crimping is a member supported in a hanging shape, and a concave groove-like covering is provided at a position below the upper die 42 and facing the lower die surface 32a for covering and crimping. An upper die surface 42a for pressure bonding is formed. The innermost (upper) part of the upper surface 42a for covering and crimping is formed in a curved shape that is curved in a semicircular arc shape, and the lower opening of the upper die surface 42a for covering and pressing is directed downward. It is formed in the curved surface shape which inclines. The pair of coated crimping pieces 11a is moved by moving the coated crimping upper mold 42 closer to the coated crimping lower mold 32 in a state where the coated crimped portion 11 is placed on the coated crimping lower mold surface 32a. It is deformed inward toward the insulation coating portion 18 so that the coating crimp portion 11 is crimped to the insulation coating portion 18.

  The core wire crimping upper die 46 is disposed above the core wire crimping lower die 36 so that the core wire crimping portion 12 is exposed between the core wire crimping upper die 46 and the core wire crimping lower die 36. It is comprised so that crimping | bonding to the part 17a is possible. More specifically, the core wire crimping upper die 46 is a member that is supported in a drooping shape, and a concave groove-shaped core wire crimping is provided at a position below the core wire crimping lower die surface 36a. An upper mold surface 46a is formed. The innermost (upper) portion of the upper die surface 46a for crimping the core wire is formed in a curved shape that is curved in a semicircular arc shape, and the lower opening of the upper die surface 46a for crimping the core wire faces downward. It is formed in the curved surface shape which inclines. Then, the core wire crimping upper die 46 is moved closer to the core wire crimping lower die 36 in a state where the core wire crimping portion 12 is placed on the core wire crimping lower die surface 36a, thereby a pair of core wire crimping pieces 12a. Is deformed inward toward the exposed core portion 17a, and the core wire crimping portion 12 is crimped to the exposed core portion 17a.

  In the present embodiment, the crimping terminal 10 having the coated crimping part 11 is targeted. However, when the crimped terminal 10 from which the coated crimping part 11 is omitted is targeted, the above-described lower mold 32 for coated crimping and the coated crimping are used. The upper mold 42 may be omitted.

  The drive mechanism unit 50 is configured to be able to move close to and away from the lower die 32 for covering and crimping, the lower die 36 for crimping the core wire, the upper die 42 for covering and crimping, and the upper die 46 for crimping the core wire. Here, the drive mechanism unit 50 includes a movable member 54 that is supported by the lift support frame 52 so as to be movable up and down, and a drive unit 56 that drives the movable member 54 up and down.

  The elevating support frame 52 has a back plate portion 52a erected in a substantially vertical posture on the fixing member 22, and a pair of guide frame pieces 52b fixed to one main surface (front side) of the back plate portion 52a. is doing. The pair of guide frame pieces 52b are fixed in a substantially vertical posture with respect to the upper surface of the fixing member 22 and the back plate portion 52a, and in a parallel posture with a predetermined interval therebetween. Moreover, the lower end part of a pair of guide frame piece 52b is separated from the upper surface of the fixing member 22, and the predetermined space for crimping | compression-bonding operations is formed among them.

  The movable member 54 is formed in a substantially rectangular parallelepiped shape that can be disposed between the pair of guide frame pieces 52b, and is guided between the pair of guide frame pieces 52b so as to be movable up and down in a fixed posture.

  On the lower part of the movable member 54, the covering crimping upper die 42, the core wire crimping upper die 46 and the like are supported in a suspended manner.

  The drive unit 56 is configured by an actuator such as an air cylinder or a hydraulic cylinder, or a reciprocating linear drive mechanism using a motor and a cam mechanism that converts the rotational motion of the motor to a linear motion, and the like. It is supported at a position by a support member (not shown). The drive portion 56 has a rod portion 56 a that can be driven forward and backward, and the tip portion of the rod portion 56 a is connected and fixed to the upper end portion of the movable member 54. Then, the movable member 54 is lifted / lowered by receiving the lifting / lowering driving force of the driving portion 56 via the rod portion 56a. As the movable member 54 is lifted / lowered, the cover crimping upper die 42 and the core wire crimping are performed. The upper mold 46 and the like are driven up and down.

  In the present embodiment, the drive unit 56 is configured to drive the cover crimping upper mold 42 and the core wire crimping upper mold 46 and the like up and down, but the coating crimping lower mold 32 and the core wire crimping lower mold 36. May be driven up or down, or both of the upper die 42 for covering crimping and the upper die 46 for crimping core wire, the lower die 32 for covering crimping and the lower die 36 for core crimping may be driven up and down. Good. In short, the drive mechanism unit 50 may be configured to relatively move the core wire crimping upper die 46 and the core wire crimping lower die 36 toward and away from each other.

  The position restricting portion 60 includes a stopper 62, a stopper supporting portion 64, and a coil spring 66 as an urging member.

  The stopper 62 includes a restriction position (see FIG. 2) that can contact the exposed core wire portion 17a on the core wire crimping portion 12 placed on the core wire crimping lower die 36, the core wire crimping lower die 36, and the core wire. Between the retreat position (see FIG. 5) retracted from the moving path of the upper crimping mold 46 (here, only the upper mold 46 for core crimping moves). It is arrange | positioned so that movement is possible.

  More specifically, the stopper 62 has a long rod-shaped stopper main body 62a, a core wire contact piece 62b, and a moving operation force receiving piece 62d. The core wire contact piece 62b is formed in an elongated plate-like piece formed so as to extend laterally from one end of the stopper main body 62a. Further, a contact portion 62c is formed protruding from the tip end portion of the stopper main body portion 62a downward, that is, toward the core wire crimping portion 12 placed on the core wire crimping lower die 36. The width of the tip of the contact portion 62c is smaller than the distance between the pair of core wire crimping pieces 12a of the core wire crimping portion 12, so that the tip of the contact portion 62c can be disposed in the core wire crimping portion 12. Is formed. Further, the moving operation force receiving piece 62d is formed in a rod shape extending laterally from the other end of the stopper main body 62a. An upper portion of the moving operation force receiving piece 62d on the side of the core wire contact piece 62b is formed on an inclined surface 62e that is inclined upward and opposite to the core wire contact piece 62b. Then, when the distal end portion of the approaching / separating operation transmitting member 70 is in sliding contact with the inclined surface 62e, the stopper 62 is moved toward the retracted position.

  The stopper 62 is supported by a stopper support portion 64 so as to be movable between a restriction position and a retracted position.

  More specifically, the stopper support part 64 is a member fixed on the terminal auxiliary support part 38, and has a stopper support hole 64a and a side hole 64b. The stopper support hole 64 a is formed in a hole shape extending along the axial direction of the core wire crimping portion 12 of the crimp terminal 10, and can support the stopper main body 62 a movably along the axial direction of the crimp terminal 10. It is configured. The axial direction of the core wire crimping portion 12 refers to the direction of the central axis of the U-shaped portion when the U-shaped portion of the core wire crimping portion 12 is considered to form a part of a substantially cylindrical shape. The core wire crimping portion 12 coincides with the axis of the exposed core wire portion 17a to be crimped and the longitudinal direction of the crimp terminal 10.

  Here, the stopper 62 is movably supported by a stopper support hole 64a formed in the stopper support portion 64, but is not limited to such a configuration. For example, a configuration in which the stopper is movably supported by the groove-shaped portion may be employed, or the stopper may be moved by inserting a rod-like member supported along the axial direction of the core wire crimping portion 12 into the stopper. It may be configured to be supported. In short, it is possible to adopt all configurations that can support the portion of the stopper that can contact the exposed core portion 17a so as to be movable between the restriction position and the retracted position.

  The stopper support hole 64a is opened on the crimp terminal 10 side, and the end of the core wire contact piece 62b of the stopper main body 62a extends outward through the opening. The stopper support hole 64a is closed on the opposite side of the crimp terminal 10, and the end of the stopper main body 62a on the moving operation force receiving piece 62d side faces the closed portion. The side hole 64b is a through hole formed at one side part of the stopper support part 64 and at the middle part of the stopper support hole 64a in the longitudinal direction, and has a long hole shape along the axial direction of the crimp terminal 10. Is formed. Then, the moving operation force receiving piece 62d of the stopper 62 protrudes to the outside of the stopper support portion 64 through the side hole 64b, and the axial direction of the crimp terminal 10 is the extending direction of the side hole 64b. Is arranged so as to be movable within a range in which the side hole 64b is formed.

  That is, the stopper 62 is supported so as to be movable along the axial direction of the core crimping portion 12 within a range in which the moving operation force receiving piece 62d can move along the side hole 64b. The core wire contact piece 62b is placed on the core wire crimping lower die 36 with the end of the stopper 62 on the core wire contact piece 62b side protruding most from the stopper support hole 64a. It is disposed at an upper position and a position from the connection portion 13. The core wire contact piece 62b is placed on the core wire crimping lower die 36 with the end of the stopper main body 62a of the stopper 62 on the core wire contact piece 62b side protruding most from the stopper support hole 64a. It is disposed at a position above the core crimping portion 12 and from the connecting portion 13 (see FIGS. 2 and 3). Further, the core wire abutting piece 62b is placed from above the core wire crimping portion 12 placed on the core wire crimping lower die 36 in a state where the stopper main body portion 62a of the stopper 62 is retracted to the innermost part in the stopper support hole 64a. It arrange | positions in the position retracted | saved to the connection part 13 side (refer FIG. 5), and interference with the upper metal mold | die 46 for core wire crimping and the stopper 62 is suppressed.

  The coil spring 66 is disposed in a compressed manner between the inner part of the stopper support hole 64a and the other end of the stopper main body 62a, and urges the stopper 62 so as to push it toward the restriction position. Yes. As the urging member that urges the stopper 62 toward the restriction position, various configurations that can apply a pressing force such as a plate spring or a torsion coil spring in addition to the coil spring 66 can be employed.

  The approaching / separating operation transmitting member 70 is configured to be movable in conjunction with the approaching / separating movement operation by the drive mechanism unit 50, and moves the stopper 62 toward the retracted position according to the approaching / moving operation, and also performs the separating / moving operation. Accordingly, the stopper 62 is moved toward the restriction position.

  More specifically, the approach / separation motion transmission member 70 is a long bar-like member, and is supported in a suspended manner by the movable member 54 at a position above the end of the moving operation force receiving piece 62d. A portion of the distal end portion of the approaching / separating motion transmitting member 70 that is opposite to the core wire contact piece 62b is inclined to an inclined surface 70a that is inclined toward the core wire contact piece 62b toward the distal end side (lower end side). . That is, the inclined surface 70a on the moving operation force receiving piece 62d side and the inclined surface 70a of the approaching / separating operation transmitting member 70 are inclined in the same direction. When the approaching / separating operation transmitting member 70 moves downward while the stopper 62 is in the restricting position, the inclined surface 70a on the moving operation force receiving piece 62d side and the inclined surface 70a of the approaching / separating operation transmitting member 70 are moved in the middle of the movement. (Refer to the approaching / separating motion transmitting member 70 shown by a two-dot chain line in FIG. 2).

  Then, an approaching operation by the drive mechanism 50, that is, an operation in which the covering crimping upper die 42 and the core wire crimping upper die 46 approach toward the covering crimping lower die 32 and the core wire crimping lower die 36. Accordingly, when the movable member 54 moves downward, the approaching / separating operation transmitting member 70 moves downward accordingly. Then, the inclined surface 70a at the tip of the approaching / separating operation transmitting member 70 is in sliding contact with the inclined surface 70a on the moving operation force receiving piece 62d side, and the stopper 62 is directed from the restricted position to the retracted position against the urging force of the coil spring 66. The moving force to be moved is applied. Further, in accordance with the separating operation by the drive mechanism 50, that is, the operation in which the covering crimping upper die 42 and the core wire crimping upper die 46 are separated from the covering crimping lower die 32 and the core wire crimping lower die 36. When the movable member 54 moves up, the approaching / separating operation transmitting member 70 moves up accordingly. Then, the distal end portion of the approaching / separating operation transmitting member 70 moves above the moving operation force receiving piece 62d, the moving force is released, and the stopper 62 moves from the retracted position toward the restricting position by the biasing force of the coil spring 66. It is configured.

  Note that the positional relationship between the distal end portion of the approaching / separating operation transmitting member 70 and the moving operation force receiving piece 62d is as follows: the upper die 42 for covering crimping, the upper die 46 for crimping core wire, the lower die 32 for covering crimping, and the core wire crimping. The inclined surface 70a on the side of the moving operation force receiving piece 62d and the inclined surface 70a of the approaching / separating operation transmitting member 70 are in sliding contact with each other at the timing before the lower mold 36 performs the crimping operation between them, and the stopper 62 Is moved to the regulation position, and the covering crimping upper die 42 and the core wire crimping upper die 46 are separated from the covering crimping lower die 32 and the core wire crimping lower die 36 (that is, the crimping terminal). 10 and the state where the electric wire 16 is set), the contact state between the approaching / separating operation transmitting member 70 and the moving operation force receiving piece 62d is set to be released.

  In the present embodiment, the approaching / separating operation transmitting member 70 is configured to be in sliding contact with the moving operation force receiving piece 62d on the extension of the crimp terminal 10 in the axial direction, but may be in sliding contact with other places.

  The operation and usage method of the terminal crimping apparatus 20 configured as described above will be described.

  First, in the initial state, the lower die 32 for covering and crimping and the lower die 36 for crimping the core wire, the upper die 42 for covering and crimping, and the upper die 46 for crimping the core wire are in a separated state (FIGS. 1 to 1). (See FIG. 4). In this state, the crimping terminal 10 is set such that the coated crimping portion 11 is placed on the lower die 32 for coating crimping and the core crimping portion 12 is placed on the lower die 36 for crimping the core wire. At this time, the core wire crimping portion 12 may be disposed on the core wire crimping lower die 36 so as to pass between the core wire crimping lower die 36 and the core wire contact piece 62b from the side of the crimp terminal 10. . The crimp terminal 10 may be set by hand or may be configured to be performed by an automatic terminal supply apparatus including a known configuration. When using a terminal supply apparatus, the crimp terminal 10 may be supplied in the form of a chain terminal in which a plurality of crimp terminals 10 are connected in parallel or in series. With the crimp terminal 10 set in this manner, the contact portion 62c of the core wire contact piece 62b of the stopper 62 is above the core wire crimp portion 12 (in this case, in the core wire crimp portion 12) and connected to the connection portion 13. It is arranged at the position.

  In this state, the operator grasps the end of the electric wire 16 and uses the guide groove 34a of the electric wire guide member 34 to arrange the exposed core portion 17a in the core wire crimping portion 12 and The end portion is disposed in the cover crimping portion 11. At this time, the end portion of the exposed core portion 17a is brought into contact with the contact portion 62c of the core wire contact piece 62b of the stopper 62 (see FIGS. 2 to 4). Thereby, the exposed core part 17a is set in a state positioned at a predetermined position. The electric wire 16 may also be configured to be set by an electric wire supply device including a known configuration.

  In this state, the movable member 54 is moved downward by driving the drive mechanism 50, and the covering crimping upper die 42, the core wire crimping upper die 46, and the approaching / separating operation transmitting member 70 are lowered (approached). .

  Then, first, the inclined surface 70a at the tip of the approaching / separating operation transmitting member 70 is in sliding contact with the inclined surface 70a on the moving operation force receiving piece 62d side, and the stopper 62 is retracted from the restricting position against the biasing force of the coil spring 66. Move towards As a result, the core wire contact piece 62b of the stopper 62 is retracted from the lower region, which is the movement path of the core wire crimping upper mold 46, and interference between the core wire crimping upper mold 46 and the stopper 62 is avoided. After the stopper 62 has moved to the retracted position, the side surface of the approaching / separating motion transmitting member 70 and the side surface of the moving operation force receiving piece 62d are in sliding contact with each other, so that the state of moving to the retracted position is maintained.

  Thereafter, the upper crimping die 42 for covering and crimping, the upper die 46 for crimping the core wire, and the approaching / separating motion transmitting member 70 are moved downward so that the upper die 42 for covering crimping and the upper die 46 for crimping the core wire are moved to the lower limit position. When moved, the coated crimping portion 11 is crimped to the insulating coating portion 18 between the coated crimping lower die 32 and the coated crimping upper die 42, and the core wire crimped lower die 36 and the core wire crimped upper die. The core wire crimping portion 12 is crimped to the exposed core wire portion 17 a between the mold 46 and the crimp terminal 10 is crimped to the end portion of the electric wire 16.

  Thereafter, the movable member 54 is moved up by driving the drive mechanism 50, and the cover crimping upper mold 42, the core wire crimping upper mold 46, and the approaching / separating operation transmitting member 70 are moved up (separated). In the middle of the movement, the contact state between the approach / separation operation transmitting member 70 and the moving operation force receiving piece 62d is released, and the stopper 62 returns from the retracted position to the restricted position by the biasing force of the coil spring 66. Then, the upper die 42 for covering and crimping and the upper die 46 for crimping the core wire and the lower die 32 for covering and crimping and the lower die 36 for crimping the core wire are returned to the initial state and are crimped to the ends. The electric wire 16 with the terminal 10 crimped is taken out, and the terminal crimping operation is completed.

  6 is a diagram showing an example of the positional relationship between the core wire abutting piece 62b of the stopper 62 and the core wire crimping portion 12, and FIG. 7 is a diagram showing an example of the shape of the exposed core wire portion 17a after crimping.

  In FIG. 6, in the core wire crimping portion 12, the core wire abutment is performed so that the end of the exposed core wire portion 17a is positioned at the position inside the length dimension L from the edge on the connection portion 13 side of the core wire crimping piece 12a. The case where the piece 62b is arrange | positioned is shown. When the crimp terminal 10 is crimped as described above by positioning as described above, the exposed core wire portion 17a extends in the longitudinal direction by the compressive force at the time of crimping, and the end portion of the exposed core wire portion 17a after the crimping is a core wire crimping piece. It extends from 12a to the connecting portion 13 side. However, as described above, since the end portion of the exposed core wire portion 17a is regulated so as to be positioned in the core wire crimp portion 12 before being crimped, the amount of extension is small.

  How much the dimension L should be set depends on the thickness (diameter) and length of the exposed core portion 17a, the compression ratio with respect to the exposed core portion 17a, the shape of the core crimp portion 12, and the like. Can be determined.

  On the other hand, as shown in FIG. 8, the core wire abutting piece 62b is arranged so that the end portion of the exposed core wire portion 17a is regulated at the position where the length dimension M protrudes from the end edge portion of the core wire crimping piece 12a to the connecting portion 13 side. As shown in FIG. 9, the exposed core wire portion 17a is elongated in the longitudinal direction by the compressive force at the time of crimping, and the end portion of the exposed core wire portion 17a after crimping is connected to the connecting portion 13 side from the core wire crimping piece 12a. It will be in a state of extending greatly. Such a greatly extended portion becomes a factor that hinders various operations on the crimp terminal 10 after crimping.

  According to the terminal crimping device 20 configured as described above, the stopper 62 is moved to the restricting position in accordance with the approaching movement operation by the driving mechanism unit 50, and the stopper 62 is retracted in accordance with the separation movement operation by the driving mechanism unit 50. In order to move to the position, the position of the tip of the exposed core wire portion 17a is regulated so as to be disposed on the core wire crimping portion 12, and then between the lower die 36 for core wire crimping and the upper die 46 for core wire crimping. Thus, the core wire crimping portion 12 is crimped to the exposed core wire portion 17a. Therefore, the extension amount of the exposed core wire portion 17a from the core wire crimping portion 12 in the state after the crimping can be made as small as possible.

  In particular, when the electric wire 16 is manually set, the position of the exposed core wire portion 17a with respect to the core wire crimping portion 12 tends to be uneven. Therefore, the amount of extension of the exposed core wire portion 17a from the core wire crimping portion 12 can be stably reduced as much as possible by performing crimping after positioning the distal end portion of the exposed core wire portion 17a as described above.

  In particular, the exposed core portion 17a formed of aluminum or an aluminum alloy is subjected to high-compression crimping from the viewpoint of reducing contact resistance, and the amount of elongation due to the crimping is increased. Therefore, it is particularly effective when performing the crimping process on the exposed core portion 17a.

  Further, since the stopper 62 is moved to the retracted position during crimping, the crimping operation of the crimp terminal 10 can be performed while preventing the interference between the stopper 62 and the core wire crimping upper mold 46.

  Further, the approaching / separating operation transmitting member 70 is moved according to the approaching / moving operation by the drive mechanism 50 to apply a moving force to move the stopper 62 toward the retracted position, and is moved according to the separating movement to move the stopper 62. Therefore, the movement operation of the stopper 62 synchronized with the movement operation of the core wire crimping upper die 46 and the like can be made more reliable.

  Further, since the stopper 62 is provided so as to be movable between the restricting position and the retracted position along the axial direction of the core wire crimping portion 12 of the crimp terminal 10, the movement amount of the stopper 62 is made as small as possible. Interference between the stopper 62 and the upper die 46 for crimping the core wire can be avoided.

  However, the manner in which the stopper 62 moves between the restriction position and the retracted position is not limited to the above example. For example, the structure which moves toward the diagonally upper side of the core wire crimping part 12 from the restriction position in the core wire crimping part 12 and moves to the retracted position may be used. In short, the stopper 62 can regulate the position of the tip of the exposed core wire portion 17a in the core wire crimping portion 12, and the movement path of the core wire crimping upper die 46 (when the core wire crimping lower die 36 moves). In other words, any configuration may be used as long as it moves between a retreat position that retreats from the movement route.

It is a front view which shows the terminal crimping apparatus which concerns on embodiment. It is a principal part side view of a terminal crimping apparatus same as the above. It is a principal part top view of a terminal crimping apparatus same as the above. FIG. 4 is a schematic explanatory diagram taken along line IV-IV in FIG. 2. It is a principal part side view of the terminal crimping | compression-bonding apparatus at the time of performing crimping | compression-bonding operation | movement. It is a figure which shows the example of positional relationship of the core wire contact piece of a stopper, and a core wire crimping part. It is a figure which shows the example of a shape of the exposed core wire part after crimping | compression-bonding. It is a figure which shows the example of positional relationship of the core wire contact piece of a stopper, and a core wire crimping part. It is a figure which shows the example of a shape of the exposed core wire part after crimping | compression-bonding.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Crimping terminal 12 Core wire crimping part 16 Electric wire 17a Exposed core wire part 20 Terminal crimping device 36 Core wire crimping lower die 36a Core wire crimping lower die surface 46 Core wire crimping upper die surface 46a Core wire crimping upper die surface 50 Drive mechanism Portion 56 Driving portion 60 Position restricting portion 62 Stopper 62a Stopper main body portion 62b Core wire abutting piece 62c Abutting portion 62d Moving operation force receiving piece 66 Coil spring 70 Approaching / separating motion transmitting member

Claims (3)

A terminal crimping device for crimping a core wire crimping portion of a crimping terminal to an exposed core portion of an electric wire end,
A lower mold on which the core crimping portion can be placed;
The core crimping part placed on the lower mold with the lower mold is placed on the exposed core part by being opposed to the lower mold and moved relative to the lower mold. An upper mold to be bonded,
A drive mechanism that relatively moves the lower mold and the upper mold closer to and away from each other;
A restriction position capable of contacting the tip of the exposed core part on the core crimping part placed on the lower mold, and a retreat position retracted from a movement path of the lower mold and the upper mold A position restricting portion having a stopper provided so as to be movable between;
It moves in conjunction with the approaching / separating movement operation by the drive mechanism unit, and moves the stopper toward the retracted position according to the approaching / moving operation by the drive mechanism unit, and according to the separation movement operation by the driving mechanism unit. An approaching / separating operation transmitting member that moves the stopper toward the restriction position;
A terminal crimping apparatus comprising: The terminal crimping device according to claim 1,
The position restricting portion includes a stopper support portion that supports the stopper movably between the restricting position and the retracted position, and an urging member that urges the stopper toward the restricting position,
The approaching / separating operation transmitting member applies a moving force for moving the stopper toward the retracted position against an urging force by the urging member in accordance with an approaching movement operation by the drive mechanism unit, and the driving A terminal crimping apparatus that releases the moving force in accordance with a separation movement operation by a mechanism and moves the stopper toward the restriction position by the biasing force of the biasing member. The terminal crimping device according to claim 1 or 2,
The stopper of the position restricting portion is a terminal crimping device provided so as to be movable between the restricting position and the retracted position along the axial direction of the core wire crimping portion of the crimp terminal.

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