JP2018063936A - Wire with terminal, manufacturing method of wire with terminal, and terminal crimping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire with terminal capable of restraining performance deterioration, and to provide a manufacturing method of a wire with terminal, and a terminal crimping device.SOLUTION: A wire 2 with terminal includes a wire 50, and a crimp terminal 1 having a wire connection 12 wound for the core wire 51 and coating 52 of the wire 50 and crimped. At the end on the tip side of the core wire 51 in the wire connection 12, there is an enlarged diameter part 12D for housing a water stop member 20 covering the tip of the core wire, and sealing the gap between the core wire and the wire connection, and the cross-sectional area of the enlarged diameter part 12D is larger than the cross-sectional area of a portion 12E closer to the proximal end side of the core wire 51 than the enlarged diameter part 12D.SELECTED DRAWING: Figure 16

Description

  The present invention relates to an electric wire with a terminal, a method for manufacturing an electric wire with a terminal, and a terminal crimping apparatus.

  2. Description of the Related Art Conventionally, there are a crimp terminal that is crimped to a core wire of an electric wire and a terminal crimping device that crimps the crimp terminal to an electric wire. As an example of a crimping terminal, Patent Document 1 discloses a crimping unit that crimps an exposed portion of a wire conductor that is exposed for a predetermined length from the tip of a covering in a covered electric wire whose outer periphery is covered with an insulating covering. A crimping terminal provided with barrel pieces on both sides in the width direction. The barrel piece is formed to have a length in the longitudinal direction longer than the length of the exposed portion of the wire conductor, and is fixed to at least a part of the surface of the crimping portion. There is disclosed a technique of a crimp terminal provided with water means and crimped by a barrel piece so that the crimping portion continuously and integrally surrounds from the leading end side to the rear end side of the covering body from the leading end side of the wire conductor. ing.

  In Patent Document 2, the crimping portion includes a coated crimping portion that crimps the coating portion of the coated conductor, a lead crimping portion that crimps the conductor exposed from the coating portion, and a sealing portion closer to the terminal body than the lead crimping portion. The technique of the electric wire with a terminal is disclosed in which the compression height of the sealing portion is higher than the compression height of the lead wire crimping portion.

WO2011 / 122622 JP 2017-84485 A

  Here, the room for improvement is still left at the point which suppresses the performance fall of the electric wire with a terminal. For example, if the core of the electric wire or the water-stopping member protrudes from the crimping terminal due to the pressure during crimping, the electrical performance and the sealing performance may be deteriorated. In a crimp terminal having a water stop member, if the protruding water stop member adheres to the mold, the sealing performance is likely to deteriorate. Or if the amount of extension of the crimp terminal at the time of crimping is large, the performance of the electric wire with terminal may vary.

  The objective of this invention is providing the electric wire with a terminal which can suppress a performance fall, the manufacturing method of the electric wire with a terminal, and a terminal crimping apparatus.

  The electric wire with a terminal of the present invention includes an electric wire and a crimp terminal having an electric wire connection portion wound around and crimped to the core wire and the sheath of the electric wire, and an end on the distal end side of the core wire in the electric wire connection portion The portion includes a diameter-enlarged portion that covers a tip end portion of the core wire and accommodates a water stop member that seals a gap between the core wire and the wire connecting portion, and the cross-sectional area of the diameter-enlarged portion is the diameter-enlarged portion. The cross-sectional area of the part of the base end side of the said core wire is larger than a part, It is characterized by the above-mentioned.

  The electric wire with a terminal concerning the present invention is provided with an electric wire and a crimp terminal which has an electric wire connection part wound around and crimped to a core wire and covering of an electric wire. At the end of the wire connecting portion on the tip end side of the core wire, there is an enlarged diameter portion that covers the tip end portion of the core wire and accommodates a water stop member that seals the gap between the core wire and the electric wire connecting portion. The area is larger than the cross-sectional area of the portion on the proximal end side of the core wire than the enlarged diameter portion. According to the electric wire with a terminal concerning the present invention, the amount of extension of an electric wire connection part is reduced by having an enlarged diameter part. By reducing the variation in length dimension by reducing the amount of elongation of the wire connecting portion, the performance of the terminal-attached wire can be prevented from being lowered.

Drawing 1 is a perspective view showing the state before crimping of the crimp terminal concerning an embodiment. FIG. 2 is a side view showing a state before crimping of the crimp terminal according to the embodiment. FIG. 3 is a perspective view illustrating the crimp terminal according to the embodiment after crimping. FIG. 4 is a side view showing the crimp terminal according to the embodiment after crimping. FIG. 5 is a perspective view showing a state before the electric wire connecting portion is bent in the crimp terminal according to the embodiment. FIG. 6 is a plan view showing a state in which a water stop member is affixed to the crimp terminal according to the embodiment. FIG. 7 is a plan view showing the terminal chain of the embodiment. FIG. 8 is a side view of the terminal crimping apparatus according to the embodiment. FIG. 9 is a front view of the terminal crimping apparatus according to the embodiment. FIG. 10 is a perspective view showing first and second molds according to the embodiment. FIG. 11 is a side view showing the terminal cut body according to the embodiment. FIG. 12 is a rear view illustrating the terminal cut body according to the embodiment. Drawing 13 is a sectional view showing the state where an electric wire and a crimp terminal were set in a terminal crimping device of an embodiment. FIG. 14 is a front view showing a second mold according to the embodiment. FIG. 15 is a cross-sectional view of the second mold according to the embodiment. FIG. 16 is a perspective view showing the wire connecting portion after crimping according to the embodiment. FIG. 17 is a longitudinal cross-sectional view of the wire connecting portion after crimping according to the embodiment. FIG. 18 is a cross-sectional view of the wire connecting portion after crimping according to the embodiment. FIG. 19 is a diagram illustrating an end portion of the electric wire connecting portion after crimping according to the embodiment. FIG. 20 is a longitudinal cross-sectional view of a wire connecting portion after crimping according to a comparative example. FIG. 21 is a diagram illustrating an end portion of a wire connecting portion after crimping according to a comparative example. FIG. 22 is a front view of a second mold according to the second example of the embodiment. FIG. 23 is a perspective view of a second mold according to a second example of the embodiment. FIG. 24 is a cross-sectional view of a second mold according to the second example of the embodiment. FIG. 25 is a perspective view of a first mold according to a second example of the embodiment. FIG. 26 is a perspective view of a terminal-attached electric wire according to a second example of the embodiment. FIG. 27 is a cross-sectional view of the electric wire with terminal according to the second example of the embodiment. FIG. 28 is another cross-sectional view of the electric wire with terminal according to the second example of the embodiment. FIG. 29 is a front view of a second mold according to a first modification of the embodiment. FIG. 30 is a cross-sectional view of a second mold according to a first modification of the embodiment. FIG. 31 is a diagram for explaining the operation during pressure bonding.

  Below, it explains in detail, referring to drawings for an electric wire with a terminal concerning an embodiment of the present invention, a manufacturing method of an electric wire with a terminal, and a terminal crimping device. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

[Embodiment]
The embodiment will be described with reference to FIGS. The present embodiment relates to an electric wire with a terminal, a method for manufacturing an electric wire with a terminal, and a terminal crimping apparatus. FIG. 13 shows a cross section taken along line XIII-XIII in FIG. FIG. 15 shows the XV-XV cross section of FIG. FIG. 18 shows a cross section XVIII-XVIII in FIG.

  First, the crimp terminal 1 according to the present embodiment will be described. The crimp terminal 1 shown in FIG. 1 and the like is a terminal that is crimped to the electric wire 50. The crimp terminal 1 is electrically connected to a mating terminal (not shown) in a state of being integrated with the electric wire 50. In the wire 50 to be crimped, the covering 52 at the end is removed and the core wire 51 is exposed for a predetermined length. The core wire 51 may be an assembly of a plurality of strands or a single wire such as a coaxial cable. The crimp terminal 1 is electrically connected to the exposed core wire 51 by being crimped to the end of the electric wire 50.

  The crimp terminal 1 includes a terminal fitting 10 and a water stop member 20. The terminal fitting 10 is a main part of the crimp terminal 1. The terminal fitting 10 is formed from a conductive metal plate (for example, a copper plate or a copper alloy plate) as a base material. The terminal fitting 10 is formed in a predetermined shape that can be connected to the mating terminal and the electric wire 50 by punching or bending the base material. The terminal fitting 10 has a terminal connection portion 11 and a wire connection portion 12. The terminal connection part 11 is a part electrically connected with the other party terminal. The wire connection portion 12 is a portion that is crimped to the wire 50 and is electrically connected to the core wire 51. A connecting portion 13 is provided between the terminal connecting portion 11 and the wire connecting portion 12. In other words, the terminal connection part 11 and the wire connection part 12 are connected via the connection part 13. The connecting portion 13 has side walls 13 a and 13 a that connect the side walls 11 a and 11 a of the terminal connecting portion 11 and the barrel pieces 15 and 16 that are the side walls of the wire connecting portion 12. One side wall 13 a connects one side wall 11 a and the first barrel piece 15, and the other side wall 13 a connects the other side wall 11 a and the second barrel piece 16. The height of the side wall 13a is lower than the height of the barrel pieces 15 and 16 and the side wall 11a. More specifically, the height of the side wall 13a decreases as it goes from the terminal connection portion 11 to the wire connection portion 12.

  The terminal fitting 10 may be a male terminal or a female terminal. The terminal connection portion 11 is molded into a male shape when the terminal fitting 10 is a male terminal, and is molded into a female shape when the terminal fitting 10 is a female terminal.

  In the description of the crimp terminal 1, the connection direction with the counterpart terminal, that is, the insertion direction with the counterpart terminal is referred to as a first direction L. The first direction L is the longitudinal direction of the crimp terminal 1. The parallel arrangement direction of the crimp terminals 1 is referred to as a second direction W. The parallel arrangement direction is a direction in which the crimp terminals 1 are arranged in parallel in the terminal chain 30 as described later, and is the width direction of the crimp terminals 1. In the crimp terminal 1, a direction orthogonal to both the first direction L and the second direction W is referred to as a third direction H. The third direction H is the height direction of the crimp terminal 1.

  In the molding process, the crimp terminal 1 is molded into a flat plate shape, and from this state, in the terminal connection part molding process, the terminal connection part 11 is formed in a cylindrical shape as shown in FIG. In the terminal connection portion forming step, the terminal connection portion 11 is bent. The terminal connection part 11 of this embodiment is formed in a cylindrical shape having a rectangular cross section. The electric wire connection part 12 is shape | molded so that a cross-sectional shape may become U shape in an electric wire connection part shaping | molding process. In the electric wire connection part forming step, the electric wire connection part 12 is bent. Moreover, the water stop member 20 is affixed to the electric wire connection part 12 in an affixing process. The pasting step may be executed before the wire connection portion forming step or after the wire connection portion forming step.

  As shown in FIGS. 1 and 6, the electric wire connecting portion 12 has a bottom portion 14, a first barrel piece portion 15, and a second barrel piece portion 16. The bottom part 14 is a part that becomes the bottom wall of the wire connection part 12 formed in a U shape. An end portion of the electric wire 50 is placed on the bottom portion 14 during the crimping process. The 1st barrel piece part 15 and the 2nd barrel piece part 16 are the site | parts used as the side wall of the electric wire connection part 12 formed in the U shape. The first barrel piece 15 and the second barrel piece 16 are connected to the end of the bottom portion 14 in the second direction W. The first barrel piece 15 and the second barrel piece 16 protrude from the end of the bottom portion 14 in the width direction in a direction intersecting the width direction. In the wire connection portion 12 formed in a U shape, when the end portion of the electric wire 50 is placed on the bottom portion 14, the first barrel piece portion 15 and the second barrel piece portion 16 are electrically connected from both sides in the second direction W. Surround 50.

  The first barrel piece 15 and the second barrel piece 16 may have the same length from the base on the bottom 14 side to the end surfaces of the tips 15a and 16a, and one length is longer than the other. Also good. In the crimp terminal 1 of the present embodiment, the length from the root to the tip 16 a in the second barrel piece 16 is longer than the length from the root to the tip 15 a in the first barrel piece 15. For example, the first barrel piece 15 and the second barrel piece 16 are wound around the electric wire 50 while overlapping each other. In the present embodiment, the second barrel piece 16 overlaps the outside of the first barrel piece 15. The first barrel piece 15 and the second barrel piece 16 may be crimped so-called B-crimps. In the B crimp, each of the first barrel piece 15 and the second barrel piece 16 is bent toward the bottom portion 14 and crimped so that the tips 15 a and 16 a are pressed toward the electric wire 50. The crimp terminal 1 of the present embodiment is provided with a water stop member 20 to be described later, so the former caulking process is employed.

  The end of the electric wire 50 is inserted into the U-shaped inner space from the U-shaped opening of the electric wire connecting portion 12, that is, the gap between the tips 15a and 16a. The wire connection portion 12 is formed so that the end of the wire 50 can be easily inserted. Specifically, as for the electric wire connection part 12, the space | interval of the 2nd direction W of the 1st barrel piece part 15 and the 2nd barrel piece part 16 is expanding as it goes to the end surface of the front-end | tip 15a, 16a from the bottom part 14 side.

  As shown in FIGS. 2 to 6, the first barrel piece 15 and the second barrel piece 16 have a connection crimping part 12 </ b> C interposed between the core crimping part 12 </ b> A and the covering crimping part 12 </ b> B. Each of the first barrel piece 15 and the second barrel piece 16 is a single piece in which the crimping parts 12A, 12C, and 12B are continuous along the first direction L in this order.

  The core wire crimping portion 12 </ b> A is a portion that is crimped to the core wire 51 at the tip of the electric wire 50. 12 A of core wire crimping | compression-bonding parts are the parts near the connection part 13 in each barrel piece part 15 and 16. FIG. The coated crimping part 12 </ b> B is a part that is crimped to the end of the coating 52. The covering crimping part 12B is a part located on the side farthest from the connecting part 13 side in each barrel piece part 15,16. 12 C of connection crimping | compression-bonding parts are site | parts which connect 12 A of core wire crimping parts, and the covering crimping | compression-bonding part 12B. 12 C of connection crimping parts are crimped | bonded with respect to the boundary part of the core wire 51 and the coating | coated 52 in the electric wire 50. FIG. The electric wire connection part 12 integrally covers the core wire 51 and the covering 52 by being crimped to the electric wire 50.

  As shown in FIGS. 5 and 6, a serration region 17 is provided on the inner wall surface of the electric wire connecting portion 12, that is, the wall surface on the side covering the electric wire 50. The serration region 17 is a core wire holding region that holds the core wire 51. The serration region 17 is a region including a portion wound around the core wire 51 on the inner wall surface of the electric wire connection portion 12. In the serration region 17, a plurality of recesses, a plurality of projections, or a combination of recesses and projections is arranged. A recessed part or a convex part increases the contact area of the electric wire connection part 12 and the core wire 51, and raises the adhesive strength of both. The serration region 17 of the present embodiment is a rectangular region, and a plurality of recesses 17a are formed at different positions in the first direction L.

  Here, it is not preferable that water permeates between the core wire 51 and the wire connecting portion 12 crimped to the core wire 51. For example, when the metal material of the core wire 51 and the metal material of the wire connection part 12 are different in the magnitude of the ionization tendency, there is a possibility of corrosion. As an example, when the material of the core wire 51 is aluminum and the material of the wire connection portion 12 is copper, the core wire 51 may be corroded. The crimp terminal 1 of the present embodiment is provided with a water stop member 20. The water stop member 20 suppresses the intrusion of water between the electric wire connecting portion 12 and the core wire 51.

  The water stop member 20 is a member formed in a sheet shape mainly including an adhesive such as an acrylic adhesive. As the water stop member 20 of this embodiment, a pressure-sensitive adhesive sheet formed by soaking a sheet-like nonwoven fabric with a pressure-sensitive adhesive and having a pressure-sensitive adhesive effect on both sides is used.

  The water stop member 20 is affixed, for example with respect to the inner wall surface of the flat wire connection part 12 shown in FIG. As shown in FIG. 6, the water stop member 20 is formed in a predetermined shape and includes a first water stop portion 21, a second water stop portion 22, and a third water stop portion 23. The first water stop portion 21 stops the portion where the first barrel piece portion 15 and the second barrel piece portion 16 overlap after completion of the pressure bonding. That is, the first water stop portion 21 is sandwiched between the first barrel piece portion 15 and the second barrel piece portion 16 that overlap each other to form a water stop region between the barrel piece portions 15 and 16. The first water stop portion 21 of the present embodiment is disposed in the second barrel piece portion 16 and extends along the first direction L.

  The second water stop portion 22 stops the terminal connection portion 11 from the tip of the core wire 51. The second water stop portion 22 is disposed at the end portion of the electric wire connection portion 12 on the terminal connection portion 11 side, and extends along the second direction W. It is desirable that at least a part of the second water stop portion 22 is provided in a region where the core wire 51 is placed. The 2nd water stop part 22 forms a water stop area | region in the clearance gap between the barrel piece parts 15 and 16 by being pinched | interposed between the overlapping barrel piece parts 15 and 16, for example. The 2nd water stop part 22 can also block the clearance gap by the side of the terminal connection part 11 rather than the front-end | tip of the core wire 51 by mutually overlapping in a crimping | compression-bonding process. The second water stop portion 22 suppresses water immersion from the terminal connection portion 11 side between the wire connection portion 12 and the core wire 51.

  The third water stop portion 23 suppresses the intrusion of water from the gap between the wire connecting portion 12 and the covering 52. The third water stop portion 23 is disposed at the end of the electric wire connection portion 12 opposite to the terminal connection portion 11 side, and extends along the second direction W. The third water stop portion 23 is sandwiched between the sheath 52 and the wire connection portion 12, thereby forming a water stop region between the sheath 52 and the wire connection portion 12.

  The terminal fitting 10 shown above is processed into a form having a flat wire connecting portion 12 shown in FIG. 5 through a pressing process for a single metal plate as a base material. In the subsequent attaching step, the water stop member 20 is attached to the flat wire connecting portion 12. Thereafter, the terminal fitting 10 is formed with the terminal connection portion 11 and the U-shaped wire connection portion 12 in the bending step.

  In the present embodiment, the terminal chain 30 shown in FIG. 7 is formed by a pressing process or a bending process. The terminal chain 30 is a chain of a plurality of crimp terminals 1 and is formed from a single metal plate. A terminal chain 30 is supplied to the terminal crimping device 100. The terminal crimping apparatus 100 performs a crimping process and a terminal cutting process on the terminal chain 30. The crimping process is a process of crimping the crimp terminal 1 of the terminal chain 30 by crimping the crimp terminal 1 to the electric wire 50. The terminal cutting step is a step of cutting the crimp terminal 1 crimped to the electric wire 50 from the terminal chain 30.

  The terminal chain 30 is an assembly of the crimp terminals 1. The terminal chain 30 includes a connecting piece 31, a plurality of crimp terminals 1, and a plurality of connecting portions 32. The connection piece 31, the crimp terminal 1, and the connection part 32 are formed from the same base material, and are integral. In the terminal chain 30, the crimp terminals 1 face the same direction and are arranged in parallel at equal intervals. In the terminal chain 30, one end of each crimp terminal 1 is connected to each other by a connecting piece 31. The shape of the connecting piece 31 is, for example, a rectangular elongated plate. The connecting piece 31 extends along the second direction W. The wire connecting portion 12 is connected to the connecting piece 31 via the connecting portion 32. More specifically, the connecting portion 32 connects the end of the bottom portion 14 opposite to the terminal connecting portion 11 side to the connecting piece 31.

  A plurality of terminal feed holes 31 a are formed in the connecting piece 31. The terminal feed holes 31 a are arranged at equal intervals along the feed direction of the terminal chain 30. The terminal feed hole 31a is a through hole that penetrates the connecting piece 31 in the plate thickness direction. The crimping terminal 1 is positioned with respect to the crimping device 102 described later by the terminal feed hole 31a. The terminal chain 30 is set with respect to the terminal crimping device 100 in a state of being wound in a reel shape.

  As illustrated in FIG. 8, the terminal crimping device 100 includes a terminal supply device 101, a crimping device 102, and a driving device 103. The terminal crimping device 100 is a device called an applicator in this technical field. The terminal supply device 101 is a device that supplies the crimp terminal 1 to a predetermined crimp position. The crimping device 102 is a device that crimps the crimp terminal 1 to the electric wire 50 at a predetermined crimping position. The driving device 103 is a device that operates the terminal supply device 101 and the crimping device 102.

  The terminal supply device 101 sequentially pulls out the terminal chain 30 wound in a reel shape from the outer peripheral side. The terminal supply device 101 supplies the crimp terminal 1 of the pulled terminal chain 30 to the crimp position in order from the top side. When the leading crimp terminal 1 is crimped to the electric wire 50 and is disconnected from the connecting piece 31, the terminal supply device 101 supplies the crimp terminal 1 that is newly at the leading position to the crimping position. The terminal supply device 101 performs a supply operation every time the crimping process and the terminal cutting process of one crimp terminal 1 are completed, and supplies the next crimp terminal 1 to the crimping position.

  The terminal supply device 101 includes a terminal feed member 101a and a power transmission mechanism 101b. The terminal feed member 101 a has a protrusion that is inserted into the terminal feed hole 31 a of the connecting piece 31. The terminal feed member 101a moves the terminal chain 30 in the feed direction in a state where the protrusion is inserted into the terminal feed hole 31a. The power transmission mechanism 101b operates the terminal feed member 101a in conjunction with a crimping operation (a vertical movement of a ram 114A or the like described later) by the crimping device 102. The terminal supply device 101 supplies the crimp terminal 1 to the crimping position by moving the terminal feeding member 101a in the vertical direction and the feeding direction in conjunction with the crimping operation of the crimping device 102.

  The crimping device 102 executes a crimping process for crimping the supplied crimping terminal 1 to the electric wire 50 and a terminal cutting process for separating the crimping terminal 1 from the connecting piece 31. The crimping device 102 includes a crimping machine 110 and a terminal cutting mechanism 120.

  The crimping machine 110 is a device that crimps the crimp terminal 1 to the electric wire 50 by crimping the crimp terminal 1 to the end of the electric wire 50. The crimping machine 110 according to the present embodiment crimps the crimp terminal 1 to the electric wire by crimping the first barrel piece 15 and the second barrel piece 16 of the crimp terminal 1 around the core wire 51 and the covering 52 of the electric wire 50. Crimp to 50. The crimping machine 110 includes a frame 111, a first mold 112, a second mold 113, and a power transmission mechanism 114.

  The frame 111 includes a base 111A, an anvil support 111B, a transmission support 111C, and a support 111D. The base 111 </ b> A is a member that forms the base of the terminal crimping apparatus 100. 111 A of bases are fixed with respect to the mounting base in which the terminal crimping apparatus 100 is mounted. The anvil support 111B, the transmission support 111C, and the support 111D are fixed on the base 111A.

The transmission portion support 111C is disposed rearward (to the right of the drawing in FIG. 8) and above (upward in the drawing of FIG. 8) with respect to the anvil support 111B. More specifically, transmission unit support 111C has a standing portion 111C ₁ and ram support portion 111C _2. Standing portion 111C ₁ is disposed behind the anvil support 111B, it is erected toward the base 111A upward. Ram support portion 111C ₂ is held on top of the standing portion 111C _1. Ram support portion 111C ₂ is a supporting portion for supporting the ram 114A which will be described later. Ram support portion 111C ₂ is above the anvil support 111B, are disposed at predetermined intervals between the anvil support 111B. The support base 111 </ b> D is a base that supports the terminal connection portion 11 of the crimp terminal 1. The height position of the upper surface of the support base 111 </ b> D is substantially the same position as the height position of the upper surface of the first mold 112.

  The first mold 112 and the second mold 113 are paired. The 1st metal mold | die 112 and the 2nd metal mold | die 113 are arrange | positioned at intervals in the up-down direction. As shown in FIG. 10, the first metal mold 112 and the second metal mold 113 sandwich the crimp terminal 1 and the electric wire 50 so that the crimp terminal 1 is crimped to the electric wire 50. The first mold 112 is a mold that supports the crimp terminal 1 from below. The first mold 112 is formed with two lower molds, and has a first anvil 112A as a first lower mold and a second anvil 112B as a second lower mold. The first anvil 112A and the second anvil 112B are integrally molded, for example. The second mold 113 is disposed above the first mold 112. The second mold 113 is formed with two upper molds, and has a first crimper 113A as a first upper mold and a second crimper 113B as a second upper mold.

  The first anvil 112A and the first crimper 113A face each other in the vertical direction. The first anvil 112A and the first crimper 113A cause the core wire crimping portion 12A to be crimped. That is, the first anvil 112 </ b> A and the first crimper 113 </ b> A are wound with the U-shaped core wire crimping portion 12 </ b> A around the core wire 51 of the electric wire 50 by crimping the core wire 51.

  The second anvil 112B and the second crimper 113B face each other in the vertical direction. The second anvil 112B and the second crimper 113B cause the coated crimping part 12B to be crimped. That is, the second anvil 112 </ b> B and the second crimper 113 </ b> B are wound with the U-shaped covering crimping part 12 </ b> B around the covering 52 and are crimped to the covering 52 by narrowing the interval between them.

  The driving device 103 transmits power to the power transmission mechanism 114 to narrow the distance between the first mold 112 and the second mold 113 in the crimping process, and crimp the wire connecting portion 12 to the wire 50. On the other hand, when the crimping process is completed, the driving device 103 widens the distance between the first mold 112 and the second mold 113. In the crimping apparatus 102 according to the present embodiment, the distance between the pair of molds 112 and 113 is changed by moving the second mold 113 up and down relative to the first mold 112.

  In the first mold 112, the first anvil 112A and the second anvil 112B may be separated, and in the second mold 113, the first crimper 113A and the second crimper 113B may be separated. In this case, the drive device 103 and the power transmission mechanism 114 may be configured to vertically move the first crimper 113A and the second crimper 113B separately.

  The power transmission mechanism 114 transmits the power output from the driving device 103 to the first crimper 113A and the second crimper 113B. As shown in FIG. 8, the power transmission mechanism 114 has a ram 114A, a ram bolt 114B, and a shank 114C.

Ram 114A is a movable member which is vertically movably supported relative to the ram support portion 111C _2. A second mold 113 is fixed to the ram 114A. Therefore, first crimper 113A and second crimper 113B moves up and down with respect to the ram support portion 111C ₂ become ram 114A integrally. The shape of the ram 114A is, for example, a rectangular shape. A female thread portion (not shown) is formed in the ram 114A. The female screw portion is formed on the inner peripheral surface of a vertical hole formed from the inner side of the ram 114A toward the upper end surface.

The ram bolt 114B has a male screw portion (not shown), and this male screw portion is screwed into the female screw portion of the ram 114A. Thus, ram bolt 114B moves up and down with respect to the ram support portion 111C ₂ become ram 114A integrally. Also, ram bolt 114B has a bolt head 114B ₁ positioned above the male screw portion. The bolt head 114B ₁ is a female thread portion (not shown) is formed. Bolt female thread of the head 114B ₁ is formed on the inner peripheral surface of the vertical bore formed toward the upper end surface from the inside of the bolt head 114B _1.

Shank 114C is a cylindrical hollow member, having respective male threaded portion 114C ₁ and the connecting portion to an end portion (not shown). Male thread portion 114C ₁ of the shank 114C is formed on the lower side of the hollow member, it is screwed into the female screw portion of the bolt head 114B ₁ of the ram bolt 114B. Thus, the shank 114C moves up and down with respect to the ram support portion 111C ₂ become ram 114A and ram bolt 114B integrally. A connecting portion of the shank 114 </ b> C is connected to the driving device 103.

The drive device 103 includes a drive source (not shown) and a power conversion mechanism (not shown) that converts the drive force of the drive source into power in the vertical direction. The connecting portion of the shank 114C is coupled to the output shaft of the power conversion mechanism. Thus, the upper and lower first crimper 113A and second crimper 113B is the output of the drive unit 103 (the output of the power conversion mechanism), ram 114A, ram bolt 114B, and become shank 114C integral with respect to the ram support portion 111C ₂ Move. As a driving source of the driving device 103, an electric actuator such as an electric motor, a hydraulic actuator such as a hydraulic cylinder, a pneumatic actuator such as an air cylinder, and the like are applicable.

The relative position in the vertical direction of the first crimper 113A for the first anvil 112A, and the relative position with respect to the vertical direction of the second crimper 113B second anvil 112B, the female screw portion of the bolt head 114B ₁ and the male threaded portion of the shank 114C by adjusting the screwing amount of 114C _1, it can be varied. Nut 114D is screwed to a male screw portion 114C ₁ of the shank 114C above the ram bolt 114B. Thus, the nut 114D forms a function of a so-called lock nut with a female screw portion of the bolt head 114B _1. The nut 114D can be fixed to the relative position of the first crimper 113A and the second crimper 113B by being tightened to the ram bolt 114B side after the adjustment of the relative position is completed.

As shown in FIG. 10, in the first anvil 112A and the second anvil 112B, concave surfaces 112A ₁ and 112B _{1 that} are recessed downward are formed at the respective upper ends. Each concave surface 112A ₁ , 112B ₁ is formed so that the cross-sectional shape is an arc shape in accordance with the shape of each bottom portion 14 of the U-shaped core wire crimping portion 12A and the U-shaped covering crimping portion 12B. Yes. In this crimping machine 110, each of the concave surfaces 112A _1, 112B ₁ is crimped position. Crimp terminal 1 for the bottom 14 have been supplied in the bottom, the bottom 14 of the core wire crimping portion 12A is placed on the concave surface 112A ₁ of the first anvil 112A, bottom 14 of the insulation crimp portion 12B is a second anvil 112B It is placed on the concave surface 112B _1. The first mold 112 is supported by the anvil support 111B with the concave surfaces 112A ₁ and 112B ₁ exposed upward.

As shown in FIG. 10, the first crimper 113A and the second crimper 113B are respectively formed with concave portions 113A ₁ and 113B _{1 that} are recessed upward. Each recess 113A _1, 113B ₁ are disposed opposite in the vertical direction with respect to each of the concave surfaces 112A _1, 112B ₁ of the first anvil 112A and second anvil 112B. Each concave portion 113A ₁ , 113B ₁ has first and second wall surfaces 115, 116 and a third wall surface 117. The first wall surface 115 and the second wall surface 116 face each other in the second direction W. The third wall surface 117 connects the upper ends of the first and second wall surfaces 115 and 116. Each concave portion 113A ₁ , 113B ₁ has the first barrel piece portion 15 and the second barrel portion 15 and the second barrel piece portion 15 in contact with the first to third wall surfaces 115, 116, 117 in contact with the first barrel piece portion 15 and the second barrel piece portion 16. The barrel piece 16 is crimped while being wound around the end of the electric wire 50. Each recess 113A _1, 113B ₁ is formed to allow such crimping operation.

  The crimping terminal 1 crimped by the crimping machine 110 is separated from the connection piece 31 by the terminal cutting mechanism 120. The terminal cutting mechanism 120 is configured to sandwich and cut the connecting portion 32 of the crimping terminal 1 supplied to the crimping position between the two terminal cutting portions, and performs the disconnection in conjunction with the progress of the crimping process. As shown in FIG. 8, the terminal cutting mechanism 120 is disposed on the front side (the left side in FIG. 8) of the second anvil 112B. The terminal cutting mechanism 120 includes a terminal cutting body 121, a pressing member 122, and an elastic member 123.

  The terminal cut body 121 is formed in a rectangular shape, and is arranged so as to be slidable in the vertical direction along the front surface of the second anvil 112B. As shown in FIGS. 11 and 12, a slit 121b is formed in the terminal cut body 121 from the sliding contact surface 121a to the second anvil 112B inward. The slit 121 b is a passage of the connecting piece 31 of the terminal chain 30. When the crimping terminal 1 to be crimped has been supplied to the crimping position, a part of the connecting portion 32 connected to the crimping terminal 1 protrudes from the slit 121b. The crimp terminal 1 supplied to the crimp position is supported from below by the first mold 112.

  The terminal cutting body 121 cuts the connecting portion 32 while moving up and down relatively with respect to the first mold 112 and the crimp terminal 1. Here, a position where the connecting piece 31 or the like can be inserted into the slit 121b is an initial position in the vertical direction of the terminal cutting body 121. As shown in FIG. 13, the end of the connecting portion 32 on the side of the wire connecting portion 12 protrudes from the slit 121b through the opening on the sliding contact surface 121a side (that is, the crimp terminal 1 side) of the slit 121b. In the terminal cut body 121, an upper edge portion (hereinafter referred to as “open edge”) 121 c in the opening is used as one terminal cutting portion. The other terminal cutting part is the upper surface edge 112a of the second anvil 112B.

  The pressing member 122 is fixed to the ram 114A and moves up and down integrally with the ram 114A. The pressing member 122 is disposed above the terminal cut body 121 and descends to push down the terminal cut body 121. The pressing member 122 is formed in a rectangular shape. The elastic member 123 applies an upward biasing force to the terminal cut body 121, and is made of a spring member or the like. When the pressing force from the pressing member 122 is released, the elastic member 123 returns the terminal cutting body 121 to the initial position in the vertical direction.

  In the terminal cutting mechanism 120, the pressing member 122 is lowered with the lowering of the second mold 113 during the crimping process, and the terminal cutting body 121 is pushed down. When the terminal cutting body 121 descends, the connecting portion 32 is sandwiched between the opening edge 121c of the slit 121b and the upper surface edge 112a (FIG. 13) of the second anvil 112B. In the terminal cutting mechanism 120, the opening edge 121c and the upper surface edge 112a act like a heel and apply a shearing force to the connecting portion 32. When the terminal cutting body 121 is further pushed down, the opening edge 121 c and the upper surface edge 112 a cut the connecting portion 32, and the crimp terminal 1 is separated from the connecting piece 31. In order to improve cutting performance, the opening edge 121c is inclined with respect to the upper surface edge 112a on the sliding contact surface 121a.

  As illustrated in FIG. 13, the electric wire 50 to be crimped is disposed at a predetermined position between the terminal cut body 121 and the pressing member 122. Specifically, the electric wire 50 is placed on the upper surface 121 d of the terminal cut body 121. For this reason, at least one of the upper part of the terminal cutting body 121 and the lower part of the pressing member 122 is provided with a space for escaping the electric wire 50 so that the electric wire 50 is not crushed therebetween.

  Here, the predetermined position is a position where the end portion of the electric wire 50 before the crimping process is present above the bottom portion 14 of the flat wire connecting portion 12. Further, the predetermined position can be placed on the bottom portion 14 of the core wire crimping portion 12A so that the tip of the core wire 51 pushed down at the start of the crimping process does not protrude from the core wire crimping portion 12A. It is a position. The core wire 51 may extend in the axial direction along with the crimping process, and the tip position of the core wire 51 may move along the axial direction. Desirably, the predetermined position is determined in consideration of the elongation.

  On the other hand, the end of the electric wire 50 (the core wire 51 and the covering 52 at the tip) is pushed down to the inner wall surface side of the electric wire connecting portion 12 by the second mold 113. For this reason, if it is not held at all, the electric wire 50 is lifted from the upper surface 121d of the terminal cut body 121, and the core wire 51 and the covering 52 at the tip end are crimped without being placed on the bottom portion 14 of the electric wire connecting portion 12. There is a fear. For this reason, in the terminal crimping apparatus 100 of this embodiment, the electric wire 50 is hold | maintained in a predetermined position between the upper part of the terminal cutting body 121, and the position of the edge part of the electric wire 50 with respect to the electric wire connection part 12 in a crimping process An electric wire holding mechanism that suppresses the deviation is provided.

  The electric wire holding mechanism includes an electric wire presser 118 that presses and holds the electric wire 50 placed on the upper surface 121d of the terminal cut body 121 as the electric wire placing portion toward the upper surface 121d (FIG. 13). The wire retainer 118 is disposed above the terminal cut body 121 and between the second mold 113 and the pressing member 122. Between the upper surface 121d of the terminal cutting body 121 and the lower surface of the wire retainer 118, a space (hereinafter referred to as “wire holding space”) 118A for holding the covering 52 of the wire 50 is formed. The electric wire holding space 118 </ b> A suppresses the lifting of the electric wire 50 from the upper surface 121 d of the terminal cut body 121 in the crimping process, and suppresses the positional deviation of the core wire 51 and the covering 52 at the tip with respect to the electric wire connecting portion 12. The wire retainer 118 can move up and down with respect to the upper surface 121 d of the terminal cut body 121, and forms a wire holding space 118 </ b> A with the upper portion of the terminal cut body 121 by descending. For example, the wire retainer 118 is fixed to the ram 114A and moves up and down integrally with the ram 114A. The electric wire 50 is held in the electric wire holding space 118 </ b> A formed with the lowering of the electric wire presser 118.

  When the crimping of the core crimping part 12A to the core wire 51 is performed by the terminal crimping apparatus 100 configured as described above, the core crimping part 12A is pressed against the core 51 with a high pressure. The core wire 51, the core wire crimping portion 12 </ b> A, and the water stop member 20 to which the pressing force is applied extend along the first direction L. In the crimping step, there is a possibility that the pressed core wire 51 extends and protrudes outside from the core wire crimping portion 12A, or the pressed water-stopping member 20 protrudes greatly from the core wire crimping portion 12A. As a result, the crimp terminal 1 may be deteriorated in sealing performance and electrical performance. In addition, if the water stop member 20 protrudes too far from the core wire crimping portion 12 </ b> A, the water stop member 20 may adhere to the second mold 113. As a result, there is a possibility that the sealing performance is deteriorated or that the crimp terminal 1 is not smoothly taken out from the second mold 113.

As will be described below, the terminal crimping apparatus 100 of the present embodiment has a configuration that can prevent the core wire 51 and the water stop member 20 from protruding from the core wire crimping portion 12A. As shown in FIG. 15, the second mold 113 of the present embodiment, the concave portion 113A ₁ has enlarged diameter portion 113C. Enlarged diameter portion 113C is provided at an end portion opposite to the second crimper 113B side of the concave portion 113A _1. That is, the enlarged diameter portion 113 </ b> C is provided at the end portion on the distal end side of the core wire 51 to be crimped.

The enlarged diameter portion 113C, a large cross-sectional area of the space than the enlarged diameter portion 113C is surrounded by the concave portion 113A ₁ as compared to the base end side portion 113D and the first die 112. Here, the “cross-sectional area” is a cross-sectional area of a cross section orthogonal to the first direction L. Portion 113D of the base end side than the enlarged diameter portion 113C in the recess 113A ₁ is a portion of the second crimper 113B side. In the enlarged diameter portion 113C, the third wall surface 117 spreads upward as compared to the proximal end portion 113D. More specifically, the third wall surface 117 of the first crimper 113A has a stepped portion 117A at the end far from the second crimper 113B. The stepped portion 117A is positioned one step higher than the other portions of the third wall surface 117 of the first crimper 113A. The height position of the third wall surface 117 changes stepwise toward the stepped portion 117A. As shown in FIG. 14, the stepped portion 117 </ b> A has an arc shape in plan view, like the other portions of the third wall surface 117.

The enlarged diameter portion 113C, than the portion 113D of the base end side, cross-sectional area of the space surrounded by the concave portion 113A ₁ and the first mold 112 is increased. The size relationship of the cross-sectional areas is a size relationship compared with the case where the position of the second mold 113 in the third direction H is the same. The enlarged diameter portion 113C is formed, for example, so that the above-described magnitude relationship is established when the second mold 113 is at least at the bottom dead center. The bottom dead center is the lower end position of the range in which the second mold 113 moves up and down. When the second mold 113 is at the bottom dead center, the first mold 112 and the second mold 113 are closest to each other in the third direction H.

According to the second mold 113 of the present embodiment, when the core wire crimping portion 12A is crimped to the core wire 51 of the electric wire 50, the pressing force by the enlarged diameter portion 113C is greater than the pressing force by the proximal end portion 113D. Lower. In addition, the compression rate at which the enlarged diameter portion 113C compresses the core wire 51 is lower than the compression rate at which the proximal end portion 113D compresses the core wire 51. Thereby, the protrusion of the core wire 51 from the core wire crimping part 12A and the protrusion of the water stop member 20 are suppressed. The enlarged diameter portion 113C of the present embodiment is provided in a range corresponding to the third water stop portion 23 in the first direction L. That is, in the concave portion 113A _1, enlarged diameter portion 113C is provided at a position to compress the third waterproof part 23. Thereby, the excessive protrusion of the water stop member 20, for example, the protrusion which adheres to the 2nd metal mold | die 113 is suppressed suitably.

The enlarged diameter portion 113C of the present embodiment is configured by expanding the third wall surface 117 upward. Height from the concave surface 112A ₁ of the first die 112 to the third wall 117, the portion of the proximal 113D low, is relatively high in the enlarged diameter portion 113C. On the other hand, the distance between the first wall surface 115 and the second wall surface 116 in the second direction W is equal between the enlarged diameter portion 113C and the proximal end portion 113D. That is, the enlarged diameter portion 113C is formed so as to reduce the flatness of the core wire crimping portion 12A and the core wire 51 after crimping, as compared with the proximal end portion 113D. Since the flatness of the core wire crimping portion 12A crimped by the enlarged diameter portion 113C is small, the core wire 51 and the water stop member 20 are unlikely to protrude from the core wire crimping portion 12A.

  FIG. 16 shows the wire connection portion 12 that is crimped to the wire 50 by the second mold 113 of the present embodiment. FIG. 17 shows a longitudinal section of the crimped wire connecting portion 12. FIG. 17 shows a cross section perpendicular to the second direction W and along the center line of the electric wire 50. The terminal-attached electric wire 2 is manufactured by crimping the electric wire connecting portion 12 to which the water blocking member 20 is previously attached to the electric wire 50. The water stop members 20 adhere to each other by being compressed in the crimping step, and close the end openings of the core wire crimping portion 12A. Moreover, the water stop member 20 covers the front-end | tip part of the core wire 51, and controls the penetration | invasion of the water to the internal space of 12 A of core wire crimping | compression-bonding parts. In addition, when a part of the water stop member 20 compressed between the electric wire 50 and the electric wire connection part 12 is pushed out to the terminal connection part 11 side, the pushed water stop member 20 uses the tip part of the core wire 51. The opening of the core wire crimping portion 12A can be closed.

  As shown in FIG. 16, the crimped core wire crimping portion 12 </ b> A according to the present embodiment has a diameter-enlarged portion 12 </ b> D at the end on the terminal connection portion 11 side. The cross-sectional area of the enlarged diameter portion 12D (for example, the area surrounded by the outermost diameter of the enlarged diameter portion 12D) is the cross-sectional area of the proximal end portion 12E in the core wire crimping portion 12A (for example, the maximum area of the proximal end portion 12E). Larger than the area surrounded by the outer diameter). This difference in cross-sectional area corresponds to the difference between the shape of the enlarged diameter portion 113C of the second mold 113 and the shape of the proximal end portion 113D. The main difference between the enlarged diameter portion 12D and the proximal end portion 12E is the height dimension, that is, the length in the third direction H. The height of the enlarged diameter portion 12D is higher than the height of the proximal end portion 12E. The width of the enlarged diameter portion 12D and the width of the proximal end portion 12E are the same.

  FIG. 20 shows a longitudinal section of a core wire crimping portion according to a comparative example. Unlike the second mold 113 of the present embodiment, the second mold for crimping the core wire crimping part 12A of the comparative example is not provided with the enlarged diameter part 113C. In the core wire crimping portion 12A of the comparative example, the water-stop member 20 and the core wire 51 have largely protruded outside from the core wire crimping portion 12A after crimping. This is because the tip end portion of the core wire crimping portion 12A is greatly compressed like the other portions. When the water stop member 20 protrudes greatly, the water stop performance is deteriorated, or the water stop member 20 adheres to the second mold 113. On the other hand, in the core wire crimping portion 12A crimped by the second mold 113 of the present embodiment, as shown in FIG. 17, the water stop member 20 and the core wire 51 do not protrude significantly outside the core wire crimping portion 12A. . Although the water blocking member 20 slightly protrudes from the core wire crimping portion 12 </ b> A, it does not protrude so much as to adhere to the second mold 113. The water blocking member 20 covers the tip of the core wire 51 and seals the gap between the core wire 51 and the core wire crimping portion 12A. Therefore, the terminal crimping apparatus 100 according to the present embodiment can suppress a decrease in sealing performance and a decrease in electrical performance in the core wire crimping portion 12A. Moreover, the terminal crimping apparatus 100 of this embodiment can suppress that the water stop member 20 adheres to the 2nd metal mold | die 113. FIG.

  Moreover, according to the 2nd metal mold | die 113 of this embodiment, as demonstrated below, the improvement of the electrical performance in 12 A of core wire crimping | compression-bonding parts can be aimed at. FIG. 21 shows an end portion of the core wire crimping portion 12A of the comparative example. FIG. 21 shows a view of the end of the core wire crimping portion 12A of FIG. In the core wire crimping part 12 </ b> A of the comparative example, the tip 15 a of the first barrel piece 15 is in contact with the inner surface and the bottom part 14 of the second barrel piece 16. The further deformation | transformation of the 1st barrel piece part 15 is easy to be controlled because the front-end | tip 15a of the 1st barrel piece part 15 contact | abuts to an inner wall surface in the middle of crimping | compression-bonding. As a result, the first barrel piece 15 and the second barrel piece 16 are not easily overlapped appropriately.

  On the other hand, in the core wire crimping part 12A according to the present embodiment, as shown in FIG. 19, the tip 15a of the first barrel piece 15 is not in contact with the inner wall surface when the crimping is completed. The tip 15a of the first barrel piece 15 is separated from the bottom 14 after the completion of the crimping. The enlarged diameter portion 113 </ b> C is formed so as to be crimped to the core wire 51 without bringing the tip 15 a of the first barrel piece 15 into contact with the bottom portion 14. Since the first barrel piece 15 does not come into contact with the bottom portion 14, the deformation of the first barrel piece 15 is hardly restricted during the crimping. When the first barrel piece 15 and the second barrel piece 16 are overlapped while falling inward, the deformation of the barrel pieces 15 and 16 is hardly hindered, so that a sufficient wrap amount and lap width can be obtained. Secured. Therefore, the terminal crimping apparatus 100 according to the present embodiment can improve the electrical performance of the core wire crimping portion 12A after crimping.

  A second example of the embodiment will be described with reference to FIGS. 22 is a front view of a second mold according to the second example of the embodiment, FIG. 23 is a perspective view of the second mold according to the second example of the embodiment, and FIG. 24 is a first view of the embodiment. Sectional drawing of the 2nd metal mold | die which concerns on 2 Example, FIG. 25 is a perspective view of the 1st metal mold | die concerning 2nd Example of embodiment, FIG. 26 is an electric wire with a terminal concerning 2nd Example of embodiment. FIG. 27 is a cross-sectional view of the electric wire with terminal according to the second example of the embodiment, and FIG. 28 is another cross-sectional view of the electric wire with terminal according to the second example of the embodiment. FIG. 24 shows a XXIV-XXIV cross section of FIG. FIG. 27 shows a XXVII-XXVII cross section of FIG. FIG. 28 shows a XXVIII-XXVIII cross section of FIG.

In a second example of an embodiment, the enlarged diameter portion of the second mold 113 113C has a plane portion 117A _1. The flat surface portion 117A ₁ is a flat surface that faces the first mold 112 in the third direction H, as shown in FIGS. Flat portion 117A ₁ is, for example, a surface parallel to the second direction W. Flat portion 117A ₁ may be parallel to the first direction L. The flat surface portion 117A ₁ of the second embodiment is a surface parallel to each of the first direction L and the second direction W. Accordingly, the plane portion 117A ₁ is a plane orthogonal to the moving direction of the second mold 113.

As shown in FIG. 22, the flat surface portion 117 </ b> A ₁ is a part of the third wall surface 117. The stepped portion 117A of the third wall surface 117 has a plane portion 117A ₁ , a first bending portion 117A ₂ , and a second bending portion 117A ₃ . The first curved portion 117A ₂ connects the flat portion 117A ₁ and the first wall surface 115. The second bending portion 117A ₃ connects the flat portion 117A ₁ and the second wall surface 116. The first curved portion 117A ₂ and the second curved portion 117A ₃ are concave curved surfaces, respectively. The curved shapes of the curved portions 117A ₂ and 117A ₃ when viewed from the first direction L are, for example, arc shapes. As shown in FIG. 23, the plane portion 117A ₁ , the first bending portion 117A ₂ , and the second bending portion 117A ₃ extend along the first direction L toward the proximal end portion 113D. .

As shown in FIG. 25, the first mold 112 of the second embodiment has a protrusion 112C. Projection 112C protrudes from the concave surface 112A ₁ of the first anvil 112A. Projection 112C is provided at the center portion of the second direction W in the concave surface 112A _1. The protrusion 112 </ b> C extends along the first direction L. The range of the protrusion 112 </ b> C in the first direction L corresponds to the range in which the core wire 51 of the electric wire 50 is disposed. The protrusion 112 </ b> C promotes adhesion between the core wire 51 and the core wire crimping portion 12 </ b> A by increasing the compression rate of the electric wire 50 with respect to the core wire 51.

As shown in FIG. 24, in the first direction L, the enlarged diameter portion 113C is located on the front side of the protrusion 112C. In the description of the second mold 113, “front side” indicates the first crimper 113A side viewed from the second crimper 113B, and “rear side” indicates the second crimper 113B side viewed from the first crimper 113A. The front side and the rear side correspond to the front side and the rear side of the crimp terminal 1 described later. In the first direction L, the range R1 in which the enlarged diameter portion 113C extends is separated from the range R2 in which the protrusion 112C extends by a predetermined distance to the front side. This distance is determined so that the effect of promoting adhesion by the protrusion 112C does not decrease. In a third wall 117, the rear end portion of the enlarged diameter portion 113C is an inclined portion 117A ₄ connected with the proximal portion 113D.

26 to 28 show the terminal-attached electric wire 2 manufactured by the first mold 112 and the second mold 113 according to the second embodiment. In the electric wire connection part 12, the core wire crimping part 12A has a diameter-enlarged part 12D and a proximal end part 12E. The enlarged diameter portion 12D is a portion crimped by the enlarged diameter portion 113C of the second mold 113. The proximal end portion 12E is a portion that is crimped by the proximal end portion 113D of the second mold 113. The core wire crimping portion 12A, the shape of the concave portion 113A ₁ of the first crimper 113A is transferred. In other words, the shape of the core wire crimping portion 12A of the wire with terminals 2 has a shape corresponding to the shape of the concave portion 113A _1.

As shown in FIGS. 26 to 28, the enlarged diameter portion 12D has a flat portion 12F. The flat portion 12F faces the bottom portion 14 in the third direction H as shown in FIG. Outer surface 12F ₁ of the flat part 12F is parallel to the second direction W. The shape of the outer side surface 12F ₁ corresponds to the shape of the planar portion 117A ₁ of the first mold 112. As shown in FIG. 28, the outer surface 12F ₁ is parallel to the first direction L. That is, in the electric wire with terminal 2 of the second embodiment, the outer side surface 12F ₁ is a plane orthogonal to the third direction H.

  As shown in FIG. 28, the bottom portion 14 has a recess 14a. The recess 14 a is formed by the protrusion 112 </ b> C of the first mold 112. The recess 14a is formed in the proximal end portion 12E. The recess 14a is recessed toward the core wire 51 side. The recess 14 a is a groove extending along the first direction L. The enlarged diameter portion 12D is separated from the concave portion 14a in the first direction L. The enlarged diameter portion 12D is located in front of the front end of the recess 14a. The water blocking member 20 covers the tip 51a of the core wire 51 and closes the opening on the connecting portion 13 side in the core wire crimping portion 12A. The enlarged diameter portion 12D accommodates the water stop member 20.

In the second mold 113, in a flat region 117A ₁ is provided in the enlarged diameter portion 113C, as described below, the elongation of the wire connecting portion 12 in the bonding step can be suppressed. By planar portion 117A ₁ are provided, it is possible to increase the cross-sectional area of the expanded diameter portion 113C. That is, at the time of crimping, the cross-sectional area of the region surrounded by the first mold 112 and the enlarged diameter portion 113C can be increased. As shown in FIG. 22, the shape of the stepped portion 117A is substantially rectangular. Corresponding to the shape of the stepped portion 117A, the cross-sectional shape of the enlarged diameter portion 12D of the core wire crimping portion 12A is a substantially rectangular shape as shown in FIG.

More particularly, the enlarged diameter portion 12D has a corner portion 12D ₁ in the side wall portion 12D ₂ and the curved shape. The pair of side wall portions 12D ₂ and 12D ₂ extends in the third direction H from the bottom portion 14 toward the flat portion 12F. Corner 12D ₁ is connects the flat portion 12F and the side wall portion 12D _2. The pair of side wall portions 12D ₂ and 12D ₂ face each other in the second direction W and are substantially parallel to each other. That is, the diameter-enlarged portion 12D has a constant dimension in the second direction W from the lower end to the upper end in the third direction H. Therefore, the cross-sectional area of the enlarged diameter portion 12D is maximized for the same terminal height H1. The terminal height H1 is the dimension in the third direction H of the crimp terminal 1 after crimping, that is, the crimp height.

In the crimping process, the volume is absorbed into the corner 12D ₁ of the enlarged diameter portion 12D. By volume the corner 12D ₁ is absorbed, the elongation amount of the wire connecting portion 12 toward the front side is reduced. As a result, variation in the length dimension of the crimp terminal 1 is suppressed. Further, by suppressing the terminal height H1 while maximizing the cross-sectional area of the enlarged diameter portion 12D, the step generated between the enlarged diameter portion 12D and the proximal end portion 12E is minimized. Therefore, the inclination angle of the inclined portion 12J (see FIG. 28) formed at the rear end portion of the enlarged diameter portion 12D becomes gradual, and the water stop performance is hardly lowered.

  Since the cross-sectional area of the enlarged diameter portion 12D is large, the extension amount of the wire connecting portion 12 and the core wire 51 in the first direction L is reduced in the crimping process. By reducing the amount of elongation of the core wire 51, a decrease in the water stop performance due to the water stop member 20 is suppressed. Moreover, when the elongation amount of the electric wire connection part 12 becomes small, the variation in the elongation amount of the electric wire connection part 12 in a crimping | compression-bonding process becomes small. As a result, in the terminal-attached electric wire 2, performance such as adhesion and resistance value is stabilized. Further, since the amount of elongation of the core wire 51 is reduced, the strength of the core wire 51 is hardly reduced.

Moreover, size reduction of the crimp terminal 1 after a crimping | compression-bonding becomes possible because the extension amount of the electric wire connection part 12 is reduced. For example, when downsizing of the connector is required, the depth dimension of the terminal accommodating portion that accommodates the crimp terminal 1 may be shortened. As a result, it is conceivable that shortening of the length dimension is required for the crimp terminal 1 after crimping. Method of manufacturing an electric wire with terminal in the second embodiment, the wire connecting portion 12 is crimped against the cable 50 by the second die 113 which enlarged diameter portion 113C has a plane portion 117A _1. Thereby, shortening of the length dimension of the crimp terminal 1 can be aimed at.

  Further, in the second mold 113 of the second embodiment, the enlarged diameter portion 113C is disposed in the first direction L so as to be separated from the protrusion 112C. Therefore, the enlarged diameter portion 113C is less likely to affect the effect of promoting adhesion by the protrusion 112C. Therefore, the 2nd metal mold | die 113 of 2nd Example can make the ensuring of the electrical performance in the electric wire 2 with a terminal, and stabilization of the length dimension of the crimp terminal 1 compatible.

Furthermore, the 2nd metal mold | die 113 of 2nd Example has the connection part 117B and the inclination part 117C, as shown in FIG. Connecting portion 117B and the inclined portion 117C is provided on the concave portion 113B ₁ of the second crimper 113B. The connecting portion 117 </ b> B and the inclined portion 117 </ b> C are part of the third wall surface 117. The connecting portion 117B is located on the front side in the first direction L with respect to the inclined portion 117C. The connecting portion 117B connects the connecting portion 117D and the inclined portion 117C of the third wall surface 117. The connecting portion 117 </ b> D is a portion that presses the connecting and crimping portion 12 </ b> C of the wire connecting portion 12. The connecting portion 117D is inclined so as to move away from the first mold 112 along the first direction L from the first crimper 113A side toward the second crimper 113B side.

The inclined portion 117C is inclined so as to approach the first mold 112 as it is separated from the first crimper 113A along the first direction L. In other words, the inclined portion 117C and the distance H2 of the third direction H of the concave surface 112B ₁ of the first die 112, it decreases as the distance from the first crimper 113A along a first direction L. The interval H2 in the third direction H changes at a constant rate along the first direction L, for example. In the second embodiment, the inclined portion 117C extends to the rear end of the concave portion 113B _1. In other words, in the third wall surface 117, the portion on the rear side of the connecting portion 117B is the inclined portion 117C. In the second mold 113 of the second embodiment, the curved shape of the connecting portion 117B and the curved shape of the inclined portion 117C are common.

  By providing the inclined portion 117C, the compression rate with respect to the coated crimping portion 12B increases as the distance from the first crimper 113A increases along the first direction L. That is, the inclined portion 117 </ b> C compresses the coated crimping portion 12 </ b> B with a high pressing force as it goes to the rear side.

  As shown in FIGS. 26 and 28, the cover crimping portion 12B of the terminal-attached electric wire 2 has a tapered portion 12G and a connecting portion 12H. The tapered portion 12G is a portion that is crimped by the inclined portion 117C of the second mold 113. The connecting portion 12 </ b> H is a portion crimped by the connecting portion 117 </ b> B of the second mold 113.

  The connecting portion 12H is connected to the connecting crimping portion 12C. The tapered portion 12G is located on the rear side in the first direction L with respect to the connecting portion 12H. In the description of the crimp terminal 1, the “front side” is the core crimp part 12A side viewed from the coated crimp part 12B, and the “rear side” is the coat crimp part 12B side viewed from the core crimp part 12A. In the taper portion 12G, the terminal height H3 decreases from the front side toward the rear side. The terminal height H3 is a distance in the third direction H from the outer surface of the bottom portion 14 to the outer surface of the cover crimping portion 12B. On the other hand, in the connecting portion 12H, the terminal height H3 does not vary along the first direction L. In the connecting portion 12H, regardless of the position in the first direction L, the terminal height H3 is substantially constant. Therefore, in the cross-sectional view of FIG. 28, the connecting portion 12H is parallel to the bottom portion 14.

  In the cross section orthogonal to the second direction W as shown in FIG. 28, the terminal height H3 of the tapered portion 12G gradually decreases from the front side toward the rear side. The terminal height H3 changes at a constant rate along the first direction L, for example. By forming the taper portion 12G in the coated crimping portion 12B, the crimping strength in the coated crimping portion 12B is increased. In other words, in the coated crimping portion 12B, the terminal height H3 decreases toward the rear side, so that the holding force by which the coated crimped portion 12B holds the electric wire 50 increases.

The covering crimping portion 12B is crimped by the second mold 113 having the inclined portion 117C, thereby suppressing the elongation of the covering crimping portion 12B. In the crimping step, the second mold 113 applies a pressing force larger than the pressing force to the front portion to the rear portion of the coated crimping portion 12B. Thereby, the elongation of the coated crimping part 12B is suppressed. Further, as shown in FIG. 24, the distance H2 of the inclined portion 117C and the concave surface 112B _1, it narrows toward the rear side along the first direction L. In other words, the cross-sectional area of the space surrounded by the inclined portion 117C and a concave surface 112B ₁ narrows toward the rear side along the first direction L. Therefore, even if the coated crimping portion 12B is about to extend rearward in the crimping process, the elongation is suppressed.

  In addition, the inclination direction of the inclined portion 117C is a direction in which the extension of the covering crimping portion 12B toward the rear side is suppressed. The inclined portion 117C causes a reaction force toward the front side to act on the coated crimping portion 12B that tends to extend toward the rear side. That is, the inclined portion 117 </ b> C not only suppresses the extension of the covering crimping portion 12 </ b> B by the frictional force but also suppresses the extension of the covering crimping portion 12 </ b> B by the reaction force toward the front side. Thus, the 2nd metal mold | die 113 of 2nd Example can suppress the expansion | extension of the coating crimping | compression-bonding part 12B which goes to the rear side of the 1st direction L. FIG.

  Further, as described above, the cover crimping portion 12B crimped by the second mold 113 of the second embodiment has a tapered portion 12G. The crimp terminal 1 in which the taper portion 12G is formed on the covering crimp portion 12B indicates that the extension of the covering crimp portion 12B is suppressed in the crimping process. That is, the second mold 113 of the second embodiment, the method of manufacturing a terminal-attached electric wire using the second mold 113, and the terminal-attached electric wire 2 have a common effect that the extension of the coated crimping portion 12B is suppressed. .

  Moreover, the electric wire 2 with a terminal which has the connection part 12H does not produce the fall of water stop performance easily. An electric wire with a terminal in which the connecting portion 12H is not provided and the connecting crimp portion 12C and the tapered portion 12G are directly connected is used as a comparative example. In the electric wire with a terminal of the comparative example, the barrel pieces 15 and 16 are bent at a steep angle at the connecting portion between the connecting crimp portion 12C and the tapered portion 12G. As a result, a gap is generated between the first barrel piece 15 and the second barrel piece 16 and the water stop performance is likely to be lowered. On the other hand, the cover crimping part 12B of the second embodiment has the connecting part 12H, so that the bending angle of the barrel piece parts 15 and 16 becomes a small angle. As a result, in the electric wire 2 with a terminal according to the second embodiment, the deterioration of the water stop performance is suppressed.

  As described above, the terminal-attached electric wire 2 according to the present embodiment includes the electric wire 50 and the crimp terminal 1 having the electric wire connecting portion 12 wound and crimped on the core wire 51 and the covering 52 of the electric wire 50. Have. A diameter-enlarged portion 12 </ b> D is provided at an end portion on the distal end side of the core wire 51 in the electric wire connecting portion 12. The enlarged diameter portion 12 </ b> D accommodates the water stop member 20 that covers the distal end portion of the core wire 51 and seals the gap between the core wire 51 and the wire connection portion 12. The cross-sectional area of the enlarged diameter portion 12D is larger than the cross-sectional area of the portion 12E on the proximal end side of the core wire 51 than the enlarged diameter portion 12D. In the crimp terminal 1 crimped by the terminal crimping apparatus 100 of the present embodiment, as the diameter-enlarged portion 12D is formed, the extension amount of the wire connecting portion 12 is reduced, and as a result, variations in the length of the crimp terminal 1 are suppressed. Is done. As a result, the terminal-attached electric wire 2 according to the present embodiment has an effect of suppressing a decrease in performance.

  Moreover, in the electric wire connection part 12 of this embodiment, the bottom part 14 of the part crimped | bonded with respect to the core wire 51 has the recessed part 14a dented in the core wire 51 side. The enlarged diameter portion 12 </ b> D is separated from the concave portion 14 a in the axial direction of the electric wire 50. The recess 14 a is formed by the protrusion 112 </ b> C of the first mold 112. By forming the recess 14a, adhesion between the core wire 51 and the core wire crimping portion 12A is promoted. Furthermore, since the enlarged diameter portion 12D is formed in a portion separated from the concave portion 14a, the effect of promoting adhesion by the concave portion 14a is unlikely to decrease.

Further, the wire with terminals 2 of the present embodiment, the enlarged diameter portion 12D includes a bottom 14 and opposed in a height direction of the crimp terminal 1, and the outer surface 12F ₁ flat portion 12F is parallel to the width direction of the bottom portion 14 Have The enlarged diameter portion 12D having the flat portion 12F has a larger cross-sectional area than the case where the flat portion 12F is not provided. Therefore, the enlarged diameter portion 12D of the present embodiment can reduce the amount of elongation of the wire connection portion 12 and suppress variations in the length of the crimp terminal 1.

The enlarged diameter portion 12D includes a side wall portion 12D ₂ extending in the height direction from the bottom portion 14 toward the flat portion 12F, and a curved corner portion 12D ₁ connecting the flat portion 12F and the side wall portion 12D _2. Have. Such a diameter-enlarged portion 12D has a substantially rectangular cross-sectional shape. Therefore, it is possible to maximize the cross-sectional area of the enlarged diameter portion 12D while suppressing an increase in the terminal width and the terminal height.

Moreover, the manufacturing method of the electric wire with a terminal of this embodiment includes a crimping process. In the crimping step, the wire connection portion 12 and the wire 50 of the crimp terminal 1 are sandwiched between the first die 112 and the second die 113 having the concave portions 113A ₁ and 113B ₁ to cover the core wire 51 and the covering of the wire 50. In this step, the wire connection portion 12 is wound around the wire 52 and crimped.

In the method for manufacturing a terminal-attached electric wire of the present embodiment, the electric wire connecting portion 12 is crimped to the electric wire 50 by the second mold 113 having the enlarged diameter portion 113C in the crimping step. Enlarged diameter portion 113C is located on the distal end 51a side of the core wire 51 in the concave portion 113A _1. The enlarged diameter portion 113 </ b> C has a flat surface portion 117 </ b> A ₁ that faces the _first mold 112. By the second mold 113 having a flat portion 117A ₁ crimped against the electric wire connecting portion 12 is made, the enlarged diameter portion 12D having a flat portion 12F in the wire connecting portion 12 is formed. As a result, the cross-sectional area of the enlarged diameter portion 12D is increased, and variations in the length of the crimp terminal 1 are suppressed.

The terminal crimping device 100 according to the present embodiment includes a first mold 112 and a second mold 113. First die 112 is a lower die for supporting the wire connecting portion 12 of the crimp terminal 1 by the concave surface 112A _1, 112B _1. The second mold 113 has concave portions 113A ₁ and 113A ₂ . The concave portions 113A ₁ and 113A ₂ are upper molds that sandwich the electric wire connection portion 12 and the electric wire 50 between the first mold 112 and wind the electric wire connection portion 12 around the core wire 51 and the covering 52 of the electric wire 50 to be crimped. It is.

The end portion of the front end side of the core wire 51 in the concave portion 113A ₁ is increased diameter portion 113C is provided. The enlarged diameter portion 113C, as compared to the base end portion 113D of the core 51 than the enlarged diameter portion 113C, a large cross-sectional area of the space surrounded by the concave portion 113A ₁ and the first die 112. Therefore, the terminal crimping apparatus 100 of this embodiment, when crimping the core wire crimping portion 12A to the core wire 51, the degree of compression at the end portion on the distal end side of the core wire 51 is lower than the degree of compression at other portions. To do.

  Therefore, the terminal crimping apparatus 100 of this embodiment can suppress the protrusion of the core wire 51 from the core wire crimping part 12 </ b> A and the excessive protrusion of the water stop member 20. Since the degree of compression in the enlarged diameter portion 113C is low, a sufficient amount of the water blocking member 20 can be interposed between the core wire 51 and the core wire crimping portion 12A after the completion of crimping. Moreover, interference with the 1st barrel piece part 15 and the 2nd barrel piece part 16 at the time of winding with respect to the electric wire 50 is suppressed because cross-sectional area is enlarged in 113 C of enlarged diameter parts. Moreover, the amount of elongation of the wire connection part 12 is reduced by providing the enlarged diameter part 113C. As a result, the length variation of the crimp terminal 1 is suppressed.

Further, in the enlarged diameter portion 113 </ b> C, the recessed portion 113 </ b> A <b> ₁ is recessed toward the side opposite to the first mold 112 as compared with the proximal end portion 113 </ b> D of the core wire 51. The third wall surface 117 is provided with a stepped portion 117 </ b> A that is recessed toward the side opposite to the first mold 112. The stepped portion 117 </ b> A has a relief structure during crimping, and allows the compressed core wire crimping portion 12 </ b> A and the core wire 51 to escape. By the concave portion 113A ₁ is recessed toward the side opposite to the first die 112, it is possible to appropriately suppress the excessive protrusion of the protrusion and waterstop member 20 of the core 51 from the core wire crimping portion 12A. Further, since the concave portion 113A ₁ is recessed toward the side opposite to the first die 112, variations in the length of the crimp terminal 1 is suppressed.

  In addition, the material of the core wire 51 of the electric wire 50 is not limited to aluminum. The core wire 51 may be, for example, copper or a copper alloy, or other metal having conductivity. The material of the crimp terminal 1 is not limited to copper or a copper alloy, and may be other conductive metals.

  The position and shape of the tapered portion 12G of the second embodiment are not limited to the illustrated position and shape. For example, a portion where the terminal height H3 does not vary may be provided on the rear side of the tapered portion 12G. In the cross section shown in FIG. 28, the shape of the tapered portion 12G may not be linear. For example, the cross-sectional shape of the taper portion 12G may be a shape curved toward the bottom portion 14 side or a shape curved toward the opposite side to the bottom portion 14 side. The tapered portion 12G may be bent in the middle of the first direction L. For example, the taper portion 12G may have a V-shaped cross section.

[First Modification of Embodiment]
A first modification of the embodiment will be described. 29 is a front view of a second mold according to the first modification of the embodiment, FIG. 30 is a cross-sectional view of the second mold according to the first modification of the embodiment, and FIG. 31 is an operation at the time of crimping. It is a figure explaining about. FIG. 30 shows a XXX-XXX cross section of FIG. The second mold 113 of the first modified example is different from the second mold 113 of the above embodiment in that the shapes of the front end of the first wall surface 115 and the second wall surface 116 are curved. The 2nd metal mold | die 113 which concerns on a 1st modification suppresses that the cutting of the connection part 13 generate | occur | produces.

  As shown in FIGS. 29 and 30, curved portions 115a and 116a are provided at the front ends of the first wall surface 115 and the second wall surface 116, respectively. The curved portions 115a and 116a are connected to the front surface 113F of the second mold 113. The front surface 113F is an end surface of the second mold 113 on the first crimper 113A side. The tangential direction at the ends 115b and 116b of the curved portions 115a and 116a is the first direction L. The tangential direction at the other ends 115c and 116c of the bending portions 115a and 115b is the second direction W. That is, the curved portions 115a and 115b are formed so that no edge is generated at both ends.

  As shown in FIG. 31, in the crimping step, the first wall 115 presses the first barrel piece 15 toward the second barrel piece 16 side, and the second wall 116 pushes the second barrel piece 16 to the first. Press toward the barrel piece 15 side. Here, the first wall surface 115 and the second wall surface 116 of the first modification have curved portions 115a and 116a, respectively. Even if the curved portions 115 a and 116 a come into contact with the side wall 13 a of the connecting portion 13, the side walls 13 a are hardly damaged. Therefore, the 2nd metal mold | die 113 of a 1st modification can suppress the fall of the intensity | strength of the connection part 13. FIG.

  When the curved part 115a, 116a is not provided in the second mold 113, the front end of the second mold 113 is more likely to damage the side wall 13a as the width Wd1 of the terminal connection part 11 is larger. Further, as the length L1 of the connecting portion 13 is shortened, the front end of the second mold 113 is likely to damage the side wall 13a. On the other hand, the 2nd metal mold | die 113 of a 1st modification has the curved parts 115a and 116a. The second mold 113 of the first modified example makes it possible to increase the width Wd1 while suppressing damage to the side wall 13a, and to shorten the length L1 of the connecting portion 13 while suppressing damage to the side wall 13a.

[Second Modification of Embodiment]
A second modification of the embodiment will be described. The water stop member 20 does not have to protrude from the electric wire connecting portion 12 after the crimping. The water blocking member 20 may not protrude from the wire connecting portion 12 as long as it covers the tip of the core wire 51 and appropriately seals between the core wire 51 and the wire connecting portion 12.

The shape of the enlarged diameter portion 113C is not limited to that illustrated. For example, the enlarged diameter portion 113 </ b> C may be formed so that the cross-sectional area of the space surrounded by the concave portion 113 </ b> A <b> ₁ and the first mold 112 gradually increases toward the distal end side of the core wire 51. On the contrary, the enlarged diameter portion 113C is toward the distal end side of the core 51, even if the cross-sectional area of the space surrounded by the concave portion 113A ₁ and the first die 112 is formed so as to gradually decrease Good.

In the enlarged diameter portion 113C, the third wall surface 117 may be provided with a plurality of step portions 117A. In this case, it is desirable that the cross-sectional area of the space surrounded by the concave portion 113A ₁ and the first die 112 is gradually increased stepwise along the first direction L. The shape of the stepped portion 117A in the front view is not limited to the arc shape. The shape of the stepped portion 117A may be, for example, a polygonal shape.

  The contents disclosed in the above embodiments and modifications can be executed in appropriate combination.

1 crimp terminal 2 wire with terminals 10 terminal fitting 11 portion 12F flat terminal connecting portion 12 wire connection portion 12A core wire crimping portion 12B covering crimping portion 12C coupling the crimping portion 12D enlarged diameter portion 12D ₁ corner portion 12D ₂ side wall portion 12E proximal side Part 12F ₁ outer surface 12G taper part 12H connecting part 12J inclined part 13 connecting part 13a side wall 14 bottom part (bottom wall part)
15 First barrel piece (first caulking piece)
16 Second barrel piece (second caulking piece)
17 serration region 20 water stop member 21 first water stop portion 22 second water stop portion 23 third water stop portion 30 terminal chain 31 connecting piece 31a terminal feed hole 32 connecting portion 50 electric wire 51 core wire 51a tip 52 covering 100 terminal crimping Device 101 Terminal supply device 102 Crimping device 103 Driving device 110 Crimping machine 111 Frame 112 First mold 112a Upper surface edge 112A First anvil 112A ₁ concave surface 112B 2nd anvil 112B ₁ concave surface 112C Protrusion 113 2nd mold 113A 1st Crimper 113A ₁ concave portion 113B second crimper 113B ₁ concave portion 113C enlarged diameter portion 113D proximal end portion 114 power transmission mechanism 115 first wall surface 116 second wall surface 115a, 116a curved portion 115b, 116b one end 115c, 116c other end 117 Third wall 17A stepped portion 117A ₁ flat portion 117A ₂ first bending part 117A ₃ second bending part 117B connecting portion 117C inclined portion 117D coupling portion 118 wire-pressing 120 terminal cutting mechanism 121 terminal truncations 122 pusher 123 elastic member L first direction W Second direction H Third direction H1, H3 Terminal height H2 spacing

Claims (8)

Electric wires,
A crimp terminal having a wire connecting portion wound around and crimped to the core wire and coating of the wire, and
At the end of the core wire in the electric wire connecting portion, there is an enlarged diameter portion that covers a water blocking member that covers the tip of the core wire and seals a gap between the core wire and the electric wire connecting portion,
The cross-sectional area of the said enlarged diameter part is larger than the cross-sectional area of the part of the base end side of the said core wire rather than the said enlarged diameter part. The electric wire with a terminal characterized by the above-mentioned. In the electric wire connecting portion, the bottom wall portion of the portion crimped to the core wire has a concave portion that is recessed toward the core wire side,
The electric wire with a terminal according to claim 1, wherein the enlarged-diameter portion is separated from the concave portion in the axial direction of the electric wire. The electric wire connecting portion has a bottom wall portion and a pair of crimping pieces protruding from both ends in the width direction of the bottom wall portion,
The pair of caulking pieces includes a first caulking piece that is wound around the core wire and the coating, and a second caulking piece that is wound around the outside of the first caulking piece. And
The electric wire with a terminal according to claim 1, wherein the enlarged-diameter portion has a flat portion that faces the bottom wall portion in the height direction of the crimp terminal and whose outer surface is parallel to the width direction of the bottom wall portion. . The diameter-enlarged portion includes a side wall portion extending in a height direction from the bottom wall portion toward the flat portion, and a curved corner portion connecting the flat portion and the side wall portion. Electric wire with terminal as described in 2. A crimping step in which the wire connection portion of the crimp terminal and the wire are sandwiched between the first die and the second die having the concave portion, and the wire connection portion is wound and crimped around the core wire and the covering of the wire. Including
In the crimping step, the second mold includes a diameter-enlarged portion at an end portion of the core wire in the concave portion, and the diameter-enlarged portion includes a flat portion facing the first mold. A method for producing a terminal-attached electric wire, wherein the electric wire connecting portion is crimped to the electric wire. A first mold for supporting the wire connection portion of the crimp terminal;
A second mold having a concave portion for sandwiching the electric wire connecting portion and the electric wire between the first die and winding and crimping the electric wire connecting portion around a core wire and a coating of the electric wire;
With
A diameter-enlarged portion is provided at an end portion of the core wire in the concave portion,
In the enlarged diameter portion, the cross-sectional area of the space surrounded by the concave portion and the first mold is larger than that of the proximal end portion of the core wire than the enlarged diameter portion. Crimping device. The terminal crimping device according to claim 6, wherein in the diameter-expanded portion, the concave portion is recessed toward the side opposite to the first mold as compared with a portion on the proximal end side of the core wire. The terminal crimping apparatus according to claim 6, wherein the enlarged diameter portion has a flat portion facing the first mold.

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