JP5428732B2 - Anticorrosive coating method for electric wire with terminal, electric wire with anticorrosive coating terminal, anticorrosive supply device, and radiation heating device - Google Patents

Description

  The present invention relates to an electrolytic corrosion suppression technique for electric wires with terminals such as automobiles and harnesses for equipment.

  The harness for automobiles and equipment may incorporate a terminal-attached electric wire with a metal terminal attached to the end of the electric wire, and different metals may be employed for the core wire and the terminal of the electric wire with terminal. In this case, when moisture as an electrolyte aqueous solution adheres to the contact portion of the different metal, there is a possibility that corrosion (electro-corrosion) occurs in the metal having a low standard electrode potential due to the standard electrode potential difference between the metals. As a measure for suppressing such electrolytic corrosion between different kinds of metals, a structure in which a film made of an anticorrosive agent is formed on a metal surface having a low potential among different kinds of metals can be considered.

  As a method for forming a film, there are various vaseline, grease, or a method of applying an anticorrosive agent having fluidity at room temperature to a metal surface at room temperature, such as a treatment agent disclosed in Patent Document 1.

  However, the anticorrosives as described above may easily volatilize and elute due to heat or solvent, and the anticorrosive effect may be reduced.

  Therefore, an anticorrosive agent that is solid at room temperature and melts at a predetermined high temperature into a liquid so that it has excellent adhesion to the metal surface and can exhibit a stable anticorrosive effect over a long period of time. Various techniques have been developed for coating on the surface.

JP-A-11-166151

  However, it is necessary to supply an appropriate amount of the above-mentioned anticorrosive agent to the anticorrosion target portion in the vicinity of the contact portion between the core wire and the terminal in order to suppress overcoating or undercoating. is there.

  Accordingly, an object of the present invention is to enable the application work while easily confirming the supply amount of the anticorrosive.

  In order to solve the above-described problem, the anticorrosive coating method for a terminal-attached electric wire according to the first aspect is applied to a terminal-attached electric wire in which a terminal is crimped to the electric wire and the core wire end portion and the terminal are made of different metals. An anticorrosive coating method for the terminal-attached electric wire, wherein (a) the anticorrosive agent is granulated and supplied to the exposed portion of the core wire end; and (b) the core wire end. Heating the exposed portion of the portion and the granular anticorrosive agent to melt the anticorrosive agent formed in a granular form and applying the film to the exposed portion of the end portion of the core wire.

  The anticorrosive coating method for a terminal-attached electric wire according to the second aspect is the anticorrosive coating method for the electric wire with a terminal according to the first aspect, wherein the step (a) melts the molten anticorrosive. By discharging to the exposed part of the said core wire end part on the temperature conditions which the said anticorrosive can harden | cure, it is set as the process of supplying a granular anticorrosive agent to the exposed part of the said core wire end part.

  The anticorrosive coating method for a terminal-attached electric wire according to a third aspect is the anticorrosion agent application method for a terminal-attached electric wire according to the first or second aspect, wherein the step (b) includes heating wire to the end portion of the core wire. The exposed portion and the granular anticorrosive are irradiated.

  The anticorrosive coating method for a terminal-attached electric wire according to a fourth aspect is the anticorrosive coating method for a terminal-attached electric wire according to any one of the first to third aspects, wherein the crimping part is crimped to the electric wire; The step (b) is intended to heat the exposed portion of the end portion of the core wire and the granular anticorrosive agent while cooling the terminal fitting portion. Thus, the anticorrosive agent formed in a granular form is melted and applied to the exposed portion of the end portion of the core wire in the form of a film.

  The electric wire with an anticorrosive coating terminal according to the fifth aspect is obtained by applying an anticorrosive by the anticorrosive coating method for an electric wire with a terminal according to any one of the first to fourth aspects.

  The anticorrosive agent supply device according to the sixth aspect is an anticorrosive agent supply device that supplies a granular anticorrosive agent while forming a granular anticorrosive agent on the exposed portion of the core wire end portion of the electric wire with terminal whose terminal is crimped to the electric wire, A terminal-supported electric wire support part that supports the electric wire with terminal under a temperature condition in which the melted anticorrosive can be cured, and a predetermined amount of the melted anticorrosive agent is supported by the electric wire support part with terminal. An anticorrosive discharger that can be discharged to an exposed portion of the end portion of the core wire of the terminal-attached electric wire.

In the radiant heating device according to the seventh aspect, a granular anticorrosive agent is disposed on the exposed portion of the core wire end portion of the terminal-attached electric wire whose terminal is crimped to the electric wire, and the exposed portion of the core wire end portion and the granular wire portion are exposed. A radiant heating device for heating the anticorrosive, wherein the terminal-attached electric wire support portion that supports the terminal-attached electric wire, the exposed portion of the core wire end portion of the terminal-attached electric wire supported by the terminal-attached electric wire support portion, and granular A radiant heating section that radiates heat rays toward the anticorrosive agent.

The radiant heating device according to an eighth aspect is the radiant heating device according to the seventh aspect, wherein the terminal-attached electric wire support portion includes a terminal-attached electric wire holding member capable of holding a plurality of electric wires with terminals in parallel. The radiant heating unit radiates heat rays toward an exposed portion of the core wire end portions of the plurality of terminal-attached electric wires held in parallel and a linear region including the granular corrosion inhibitor.

  According to the anticorrosive coating method for a terminal-attached electric wire according to the first aspect, the size of the granular anticorrosive is confirmed at the stage where the anticorrosive is granulated and supplied to the exposed portion of the end portion of the core wire. Thus, the supply amount of the anticorrosive can be confirmed. For this reason, the application | coating operation | work can be performed, confirming the supply amount of anticorrosive easily.

  According to the 2nd aspect, since a granular corrosion inhibitor can be supplied to the exposed part of the said core wire edge part, it can reduce the number of manufacturing processes. Moreover, since the melted anticorrosive solidifies and becomes granular on the exposed portion of the end portion of the core wire, the melted anticorrosive agent is stably attached to the exposed portion of the end portion of the core wire, and the next heating step can be easily performed.

  According to the anticorrosive coating method according to the third aspect, by irradiating the exposed portion of the end portion of the core wire and the granular anticorrosive agent with a heat ray, the target location for applying the anticorrosive agent becomes a relatively stable temperature. Easy to heat locally.

  According to the 4th aspect, since the exposed part of the said core wire end part and a granular corrosion inhibitor are heated, cooling a terminal fitting part, the anticorrosive melt | dissolved by heating cannot flow into a terminal fitting part easily. For this reason, the poor contact etc. in a terminal fitting part can be controlled.

  According to the 5th aspect, the anticorrosion agent application terminal-equipped electric wire by which the anticorrosion agent was apply | coated by appropriate quantity can be obtained.

  According to the anticorrosive supply apparatus which concerns on a 6th aspect, it can supply, forming a granular anticorrosive in the exposed part of the said core wire edge part. Moreover, since the melted anticorrosive solidifies and becomes granular on the exposed portion of the end portion of the core wire, the molten anticorrosive agent is stably attached to the exposed portion of the end portion of the core wire.

  According to the 7th aspect, it is easy to carry out local heating so that an anticorrosive agent application target location may become comparatively stable temperature by radiating a heat ray toward the exposed part of the end part of the core wire, and the granular anticorrosive agent .

  According to the radiant heating device according to the eighth aspect, the exposed portions of the end portions of the core wires of the plurality of terminal-attached electric wires held in parallel and the granular anticorrosive are heated substantially simultaneously to form the granular anticorrosive. Can be melted and applied.

It is process drawing which shows the anticorrosive coating method of the electric wire with a terminal which concerns on embodiment. It is a side view which shows the electric wire with a terminal in an anticorrosive supply process. It is a side view which shows the electric wire with a terminal in a heating process. It is a schematic side view which shows an anticorrosive agent supply apparatus. It is a schematic plan view which shows a radiation heating apparatus. It is a schematic front view which shows a radiation heating apparatus. It is a schematic side view which shows a radiation heating apparatus. It is a schematic plan view which shows the electric wire holding member with a terminal. It is a schematic side view which shows the electric wire holding member with a terminal. It is explanatory drawing which shows the process of forming a granular corrosion inhibitor. It is explanatory drawing which shows the process of selecting and taking out granular anticorrosive one by one. It is explanatory drawing which shows the process of selecting and taking out granular anticorrosive one by one. It is explanatory drawing which shows the process of arrange | positioning the manufactured granular anticorrosive to the exposed part of an electric wire with a terminal. It is explanatory drawing which shows the heating process using a high temperature tank.

  Hereinafter, the anticorrosive coating method for the electric wire with terminal, the electric wire with anticorrosive coating terminal, the anticorrosive supply device, and the radiation heating device according to the embodiment will be described. Here, after describing the anticorrosive coating method and the anticorrosive coating terminal-attached electric wire for the electric wire with terminal, various devices used directly for carrying out the method will be described.

<Method of applying anticorrosive agent for electric wire with terminal and electric wire with anticorrosive agent applied terminal>
FIG. 1 is a process diagram showing a method for applying an anticorrosive agent to an electric wire with terminal, FIG. 2 is a side view showing an electric wire with terminal 10 in an anticorrosive agent supplying step, and FIG. 3 is a side view showing the electric wire with terminal 10 in a heating step. FIG.

  For convenience of explanation, the terminal-attached electric wire 10 that is an object to which the anticorrosive agent is applied by the present application method will be described. The electric wire with terminal 10 is configured by crimping the terminal 20 to the electric wire 12, and in particular, the core wire end portion 16 of the electric wire 12 and the terminal 20 are dissimilar metals (in this case, particularly when the standard electrode potential is different). (Refer to FIG. 2 and FIG. 3).

  That is, the electric wire 12 has a core wire made of an aluminum (or aluminum alloy) wire, and a covering portion 14 formed by extruding a resin or the like on the outer periphery of the core wire. The core wire is formed by twisting a plurality of aluminum (or aluminum alloy) strands or by a single core wire of aluminum (or aluminum alloy). And the coating | coated part 14 of the edge part of the electric wire 12 is peeled, and the core wire edge part is exposed to the edge part. Hereinafter, the end exposed at the end of the electric wire 12 will be described as the core end 16. The terminal 20 is formed long in one direction, and has a terminal fitting portion 22, a core crimping portion 24, and a covering crimping portion 26 in that order from the distal end side to the proximal end side in the longitudinal direction. The terminal fitting portion 22, the core wire crimping portion 24, and the covering crimping portion 26 are interconnected at the bottom of the terminal 20, and are separated from each other at a portion above the bottom.

  The terminal 20 is formed by punching, bending, or the like of a copper (or copper alloy such as brass or tin plating). Here, a case where the terminal 20 is a female terminal will be described. However, the terminal may be a male terminal.

  The terminal fitting portion 22 is configured such that a male terminal 28 or the like can be inserted and connected. Here, the terminal fitting portion 22 is formed in a cylindrical shape (more specifically, a rectangular tube shape) penetrating along the longitudinal direction of the terminal 20, and a male terminal 28 is formed therein so that it can be inserted and connected. Yes. Note that a contact piece 22 a for contacting the male terminal 28 may be provided inside the terminal fitting portion 22. In the case of a male terminal, the terminal fitting portion is formed in a substantially rectangular flat plate shape or a long bar shape.

  Of the terminal 20, the base end side portion of the terminal fitting portion 22 has a core wire crimping portion 24 and a covering crimping portion 26 of the terminal 20 from a bottom portion 23 extending from a part of the terminal fitting portion 22 in the longitudinal direction of the terminal 20. It is formed so as to protrude toward one side orthogonal to the longitudinal direction. The core crimping part 24 and the covering crimping part 26 are formed in a substantially U shape in a sectional view in which one side opens in a state before crimping to the electric wire 12.

  Then, the core wire crimping portion 24 is disposed in a state where the core wire end portion 16 of the electric wire 12 is disposed in the core wire crimping portion 24 of the terminal 20 and the covering portion 14 is disposed in the covering crimping portion 26. The cover crimping part 26 is crimped by a crimping die or the like. Thus, the core wire crimping portion 24 is crimped to the longitudinal intermediate portion of the core wire end portion 16 so as to cover substantially the entire outer periphery, and the covering crimping portion 26 is the end portion on the core wire end portion 16 side of the covering portion 14. Crimped to In this state, the base end portion of the core wire end portion 16 is exposed between the core wire crimp portion 24 and the cover crimp portion 26 (hereinafter, this portion may be referred to as an exposed portion 16b). The distal end portion is exposed between the core wire crimping portion 24 and the terminal fitting portion 22 (hereinafter, this portion may be referred to as an exposed portion 16a).

  In addition, although demonstrated about the terminal-attached electric wire 10 by the example which crimps | bonds the terminal 20 with respect to the core wire edge part 16 exposed to the edge part of the electric wire 12, it is not necessarily required. For example, the terminal-attached electric wire may have a configuration in which a terminal is crimped to connect the core wire end portion of another electric wire to the core wire end portion exposed at the middle portion in the longitudinal direction of the electric wire.

  In the electric wire with terminal 10 as described above, the core end 16 of the electric wire 12 is formed of aluminum (or aluminum alloy), and the terminal 20 is formed of a copper (or copper alloy such as brass or tin plating). Has been. For this reason, the standard electrode potential of the core wire end portion 16 is lower than the standard electrode potential of the terminal 20. Thereby, when water (electrolyte aqueous solution) adheres to the contact part vicinity part of the core wire crimping part 24 and the core wire end part 16, there is a possibility that corrosion (electric corrosion) occurs in the exposed parts 16a and 16b of the core wire end part 16. . This embodiment demonstrates the technique which suppresses electrolytic corrosion by apply | coating an anticorrosive agent to the exposed parts 16a and 16b and its vicinity part, and covering them in the shape of a film | membrane. However, a gap may be provided between the crimping piece ends on both sides of the core wire crimping portion 24 in the crimped state, and the core wire end portion 16 may be exposed at that portion. In this case, the exposed part between the crimping pieces may be a target to which the anticorrosive agent is applied. That is, a portion exposed to the outside in the vicinity of the contact portion with the terminal 20 in the core wire end portion 16 is an application target of the anticorrosive agent.

  The anticorrosive coating method for the electric wire with terminal includes an anticorrosive supply process P1 and a heating process P2 (see FIG. 1).

  The anticorrosive agent supplying step P1 is a step in which the anticorrosive agent 30 is granulated and supplied to the exposed portions 16a and 16b of the core wire end portion 16 (see FIG. 2).

  Here, an anticorrosive agent is what suppresses electrolytic corrosion by covering the electric corrosion suppression object location, and is also called a chelating agent. This anticorrosive agent is solid at room temperature, and has a physical property that melts and changes to a liquid when heated.

  Examples of the step of granulating the anticorrosive and supplying it to the exposed portions 16a and 16b include the following two modes.

  The first is by discharging the anticorrosive 30 melted by heating to the exposed portions 16a and 16b under temperature conditions (for example, at room temperature) where the melted anticorrosive 30 can be cured, thereby exposing the exposed portions 16a, 16b, In this mode, the granular anticorrosive 30 is supplied to 16b while being formed. That is, the step of forming the anticorrosive 30 in a granular form and the step of supplying the anticorrosive are substantially simultaneously performed.

  The second is an aspect in which the granular anticorrosive 30 is formed on the exposed portions 16a and 16b after the granular anticorrosive 30 is formed.

  These more specific contents will be described later.

  In any case, the granular anticorrosive 30 is disposed on the exposed portions 16a and 16b of the core wire end 16 by this step (see FIG. 2). In addition, the magnitude | size (namely, supply amount) of the granular anticorrosive 30 is a magnitude | size (amount) which can cover at least the outer periphery of the exposed part 16a or the exposed part 16b by the next heating process, and more Preferably, the size (amount) is such that it can adhere to the surface of the core wire crimping portion 24. The appropriate size (amount) of the granular anticorrosive 30 can be determined experimentally and empirically by observing the state of application of the anticorrosive to the terminal-attached electric wire 10 after the heating step. The granular anticorrosive 30 may have any shape such as a substantially spherical shape, a flat granular shape, a prismatic shape, or a cylindrical shape. That is, the anticorrosive 30 should just be formed in the granular shape from which the operator can confirm the magnitude | size (namely, supply amount) from the outside.

  In the heating process P2, the exposed portions 16a and 16b and the vicinity of the granular anticorrosive 30 are heated to melt the granular anticorrosive 30 and coat the anticorrosive 30 on the exposed portions 16a and 16b. It is the process of apply | coating to a shape (refer FIG. 3).

  Examples of the heating method include heating using heat radiation by a halogen heater or the like, heating using heat conduction from a hot plate or the like, heating using heat transfer (convection) by a high-temperature tank or the like. These more specific contents will be described in detail later.

  In the main heating step P2, when the exposed portions 16a and 16b and the anticorrosive agent 30 formed in a granular form are heated and the anticorrosive agent 30 is melted, the anticorrosive agent 30 is centered around the exposed portions 16a and 16b (core wire). Crimp part 24 etc.) It spreads on the surface. After that, when the terminal-attached electric wire 10 is naturally cooled or forcedly cooled, the anticorrosive 30 is solidified in a state where it is applied in a film form on the surfaces of the exposed portions 16a and 16b and the surface of the core wire crimping portion 24. Then, the anticorrosion structure part 32 is manufactured (see FIG. 3, particularly the net line part). Thereby, it is suppressed that the exposed parts 16a and 16b galvanize.

  According to the anticorrosive coating method for the terminal-attached electric wire 10 configured as described above, the anticorrosive 30 is granulated and supplied to the exposed portions 16a and 16b of the core wire end portion 16. The size and the like of the anticorrosive 30 can be confirmed. Thereby, the quantity of the anticorrosive agent to apply | coat can be confirmed, and the application | coating operation | work can be performed, confirming the supply amount of the anticorrosive agent 30 easily. Then, by confirming the supply amount of the anticorrosive agent 30, for example, if it is confirmed that it is not an appropriate amount, the supplied granular anticorrosive agent 30 is removed, or the granular anticorrosive agent 30 is supplied or It is possible to take measures such as adjusting the device to be manufactured. Thereby, the anticorrosive agent-coated terminal-attached electric wire 10 to which the anticorrosive agent 30 is applied in an appropriate amount can be obtained.

<Corrosion preventive supply device>
The supply method and anticorrosive agent supply apparatus which make the anticorrosive agent 30 granular and supply it to the exposed portions 16a and 16b of the core wire end portion 16 will be described. FIG. 4 is a schematic side view showing the anticorrosive supply device 40.

  This anticorrosive agent supply device 40 discharges the melted anticorrosive 30 to the exposed portions 16a and 16b under temperature conditions where the melted anticorrosive 30 can be cured, so that the exposed portions 16a and 16b are granular. The anticorrosive agent 30 is supplied while forming the anticorrosive agent 30 and includes a terminal-equipped wire support portion 42 and an anticorrosive agent discharge portion 44.

  The terminal-attached electric wire support portion 42 is configured to be able to support the electric wire with terminal 10 in a fixed posture with the exposed portions 16a and 16b facing upward. Here, the terminal-attached electric wire support portion 42 is configured not to have a heating device such as a heater, and is configured to support the terminal-attached electric wire 10 at room temperature. As a configuration in which the terminal-attached electric wire support portion 42 supports the terminal-attached electric wire 10 in a fixed posture, the terminal-attached electric wire 10 is formed by a recess capable of accommodating the terminal-attached electric wire 10, as will be described later. Various configurations such as a configuration to support, a configuration in which the terminal 20 or the electric wire 12 of the electric wire 10 with a terminal is partially held and supported in a fixed posture can be adopted.

  The anticorrosive discharge unit 44 is configured to be able to discharge the melted anticorrosive 30 onto the exposed portions 16a and 16b by a preset amount. Here, the anticorrosive discharge unit 44 stores the liquid while the anticorrosive 30 is heated to a melted state in which the anticorrosive 30 is softened so as to be discharged (for example, a Vicat softening temperature or higher defined in JISK7206 or the like, for example, 130 degrees Celsius). A portion 44a and a nozzle 44b for discharging the melted anticorrosive 30 stored in the storage portion 44a, and pressurizing the anticorrosive discharge portion 44 by a pressurizing mechanism such as air supply. Thus, a predetermined amount of the anticorrosive 30 can be discharged from the nozzle 44b. In addition, adjustment of the anticorrosive 30 to discharge is performed by adjusting the supply time (air pulse time) of the air intermittently supplied to the anticorrosive discharge part 44, for example. As such an anticorrosive discharge part 44, what is called a dispenser can be used.

  The anticorrosive discharge part 44 can be driven up and down in a posture in which the nozzle 44b faces downward by a moving mechanism 46 having a linear actuator such as a linear motor or a combination mechanism such as a motor and a ball screw mechanism. 20 is supported so as to be movable along the longitudinal direction. Thereby, the nozzle 44b can be selectively disposed immediately above the exposed portions 16a and 16b, and can be moved up and down on the exposed portions 16a and 16b.

  In the said anticorrosive agent supply apparatus 40, in the state which has arrange | positioned the nozzle 44b just above the exposed part 16a (or 16b) of the electric wire 10 with a terminal, the quantity which preset the anticorrosive 30 of a molten state from the anticorrosive discharge part 44 Only dispense. Further, during or immediately after the discharge, the anticorrosive discharge portion 44 is raised. Then, the discharged anticorrosive 30 is cooled and solidified on the exposed portion 16a (16b). Thereby, the anticorrosive 30 is supplied to the exposed portion 16a (or 16b) while being formed in a granular shape.

  Subsequently, in the state where the nozzle 44b is arranged just above the exposed portion 16b (or 16a) of the terminal-attached electric wire 10, the exposed portion is obtained by discharging the molten anticorrosive 30 in the same manner as described above. The anticorrosive 30 is also supplied to 16b (or 16a) while being formed in a granular form.

  In addition, when the several electric wire 10 with a terminal is hold | maintained in parallel state using the electric wire holding member 60 with a terminal mentioned later etc., it can be moved to the said movement mechanism 46 further along the arrangement direction of the electric wire 10 with a terminal. By incorporating the configuration and allowing the anticorrosive discharge portion 44 to move along the arrangement direction, the anticorrosive 30 can be continuously supplied to the plurality of electric wires with terminals 10 arranged in parallel. it can.

  According to the anticorrosive agent supply method and the anticorrosive agent supply device 40 configured as described above, by discharging the molten anticorrosive agent 30 to the exposed portions 16a and 16b, the granular anticorrosive agent 30 is applied to the exposed portions 16a and 16b. Can be supplied while forming. For this reason, the anticorrosive 30 can be supplied to the exposed portions 16a and 16b with a relatively small number of steps.

  Moreover, since the melt | dissolved anticorrosive 30 solidifies on the exposed parts 16a and 16b and becomes granular, the said granular anticorrosive 30 will be in the state which adhered to the exposed parts 16a and 16b stably. For this reason, there also exists an advantage that the transfer to the following process (for example, heating process) and the handling in the said process can be performed easily.

<Radiation heating device>
A method related to the heating process and the radiation heating apparatus 50 will be described. FIG. 5 is a schematic plan view showing the radiant heating device, FIG. 6 is a schematic front view showing the radiant heating device, and FIG. 7 is a schematic side view showing the radiant heating device.

  The radiant heating device 50 is a device for heating the exposed portions 16a and 16b and the granular anticorrosive agent 30 by irradiating the exposed portions 16a and 16b and the granular anticorrosive agent 30 with a terminal. An electric wire support part 52 and a radiation heating part 58 are provided.

  The terminal-attached electric wire support portion 52 is configured to be able to hold the terminal-attached electric wire 10 in a fixed posture. Here, the terminal-attached electric wire support 52 includes a stage 53 and a terminal-attached electric wire holding member 60.

  The stage 53 is formed in a long plate shape, and is supported on the base table 51 through a pair of linear guide portions 54 so as to be horizontally movable. That is, the linear guide portion 54 has a guide rod 54 a supported on the base stand 51 in a substantially horizontal posture, and a guide movable portion 54 b that can move along the guide rod 54 a and is fixed to the lower surface of the stage 53. doing. And the guide movable part 54b moves along the guide rod 54a, so that the stage 53 and the terminal-attached electric wire holding member 60 supported by the stage 53 can be heated by the radiation heating part 58, and the heating position. It is supported so as to be movable between the set position moved laterally from the position (see FIGS. 5 and 6).

  The stage 53 is configured to be movable and driven between the heating position and the set position by the terminal-attached electric wire moving mechanism 55. That is, the terminal-attached electric wire moving mechanism portion 55 is configured by a linear actuator such as an air cylinder or an oil cylinder, and has a main body portion 55a and a rod portion 55b that can be driven forward and backward from the main body portion 55a. The terminal-attached electric wire moving mechanism 55 is fixed in a posture along the moving direction of the stage at a side position of the stage 53 on the base table 51. The distal end portion of the rod portion 55 b is connected to one side portion of the stage 53. The stage 53 is configured to be moved between the heating position and the set position in accordance with the forward and backward driving of the rod portion 55b by the driving of the terminal-attached electric wire moving mechanism portion 55.

  The radiant heating unit 58 is configured by a heating device that can radiate heat rays such as a halogen heater, and is supported by a heating unit support 58a at a position away from the stage 53 on the heating position. The irradiation region of the heat rays radiated from the radiant heating unit 58 is downward, and is a range in which the exposed portions 16a and 16b of the terminal-attached electric wire 10 held by the terminal-attached electric wire holding member 60 on the stage 53 can be irradiated. Is set to This irradiation region will be described in detail later.

  FIG. 8 is a schematic plan view showing the terminal-attached electric wire holding member 60, and FIG. 9 is a schematic side view showing the terminal-attached electric wire holding member 60. The terminal-attached electric wire holding member 60 includes a plate-like main body portion 61, a proximal end side holding portion 62, and a distal end side holding portion 64. The proximal end holding portion 62 and the distal end side holding portion 64 are disposed and fixed with a space on one main surface of the main body portion 61. The distance between the base end side holding portion 62 and the tip end side holding portion 64 is such that the core wire end portion 16 (including the exposed portions 16a and 16b to be coated) can be disposed between them, for example, the terminal-attached electric wire 10 Among them, the dimension is set to be larger than the dimension between the terminal fitting part 22 and the cover crimping part 26. Further, a substantially elongated groove 61a penetrating the front and back is formed in a substantially central portion of the main body 61 corresponding to the proximal end holding portion 62 and the distal end holding portion 64.

  The distal end side holding portion 64 is formed with a hole portion 64a that can accommodate the distal end side portion (or the whole) of the terminal fitting portion 22 of the terminal-attached electric wire 10. More specifically, the hole portion 64a is formed in a bottomed hole shape that opens to the proximal end side holding portion 62 side in a portion of the distal end side holding portion 64 that faces the proximal end side holding portion 62. Yes. The hole 64a is formed so as to have a substantially rectangular parallelepiped space that opens larger (slightly larger here) than the cross-sectional shape of the terminal fitting portion 22 that is substantially orthogonal to the longitudinal direction of the terminal-attached electric wire 10.

  Further, the proximal end side holding portion 62 is formed with a groove portion 62a in which the electric wire 12 can be arranged in a substantially linear state. More specifically, the groove part 62a is formed in the one main surface (upper surface) of the base end side holding | maintenance part 62 in the position facing the said hole part 64a. The groove part 62a is formed in a linear groove shape that opens to the tip side holding part 64 side and the opposite side.

  Further, the base end side holding portion 62 is provided with a retaining portion 63 for preventing the electric wire 12 disposed in the groove portion 62a from being pulled out from the groove portion 62a. As the structure of the retaining portion 63, for example, a substantially disc-shaped flat plate member is pinned at a position on the side of the groove 62 a on one main surface (upper surface) of the base end side holding portion 62 and at an eccentric position of the flat plate member. It is possible to adopt a configuration in which it is attached rotatably by a stopper or the like, and the posture is changed between a retaining posture and a releasing posture by rotation of the flat plate member.

  And when setting the electric wire 10 with a terminal to the electric wire holding member 60 with a terminal, while inserting the front end side part of the terminal fitting part 22 into the hole part 64a through the opening, the electric wire 12 behind the terminal 20 is made into the groove part 62a. It arranges in. Further, when the posture of the retaining portion 63 is changed, the terminal-attached electric wire 10 is held. In this state, the core wire end portion 16 and the core wire crimping portion 24 including the exposed portions 16a and 16b are exposed outwardly between the proximal end side holding portion 62 and the distal end side holding portion 64, and on the exposed portions 16a and 16b. The granular anticorrosive 30 disposed on the outside is exposed outward (upward).

  Thus, the exposed portion 16a, 16b and the core wire crimping portion 24 are exposed by the groove portion 62a formation portion of the proximal end side holding portion 62 and the hole portion 64a formation portion of the distal end side holding portion 64. A holding unit for holding is configured.

  In addition, the said groove part 62a and the hole part 64a are formed in multiple numbers along the elongate direction of the electric wire holding member 60 with a terminal here, and the electric wire 10 with a terminal has a space | interval by each group, and is parallel. Has come to be supported.

  In addition, a hollow portion 65 is formed in the distal end side holding portion 64 along the longitudinal direction (the parallel direction of the plurality of hole portions 64a). And the refrigerant | coolant (water (liquid) or air (gas)) from the refrigerant supply source 66 using a pump etc. is circulated and supplied in the said cavity part 65, so that the front end side holding | maintenance part 64 is cooled. It has become. And the terminal fitting part 22 part arrange | positioned in the hole 64a is cooled because the front end side holding | maintenance part 64 is cooled. That is, a cooling mechanism that cools the terminal fitting portion 22 is configured by the hollow portion 65 formed in the distal end side holding portion 64 and the configuration that supplies the refrigerant to the hollow portion 65. The front end side holding portion 64 is preferably formed of a metal member (copper, aluminum, or the like) in order to improve thermal conductivity.

  But a cooling mechanism is not restricted to the said structure, What is necessary is just to be able to cool the terminal fitting part 22 of the electric wire 10 with a terminal. For example, the cooling mechanism may be a mechanism that blows air to the terminal fitting portion 22 by forming a fin-like portion in the distal end side holding portion 64.

  In the radiant heating device 50 configured as described above, the heating step is performed as follows.

  That is, the terminal-attached electric wire holding member 60 provided with the granular anticorrosive 30 is prepared in a terminal-attached electric wire holding member 60, and the terminal-attached electric wire holding member 60 is arranged in the set position. Set up. The positioning set of the terminal-attached electric wire holding member 60 with respect to the stage 53 can employ a setting mechanism using a fitting structure, a screwing structure, a toggle clamp, or the like.

  Thereafter, the stage 53 and the terminal-attached electric wire holding member 60 are moved from the set position to the heating position by driving the terminal-attached electric wire moving mechanism portion 55, and the heat rays radiated from the radiation heating portion 58 are changed into the electric wires 10 with terminals. The exposed portions 16a and 16b and the granular anticorrosive 30 are irradiated. Here, the heat ray irradiation region includes a region in which a plurality of exposed portions 16a are arranged in a straight line (for example, a width of 5 mm) and a plurality of other exposed portions 16b are arranged in a straight line among the plurality of electric wires 10 with terminals arranged in parallel. It is set so as to aim at an area (for example, a width of 5 mm), that is, two linear areas. Thereby, it heats centering on each exposed part 16a, 16b and the granular anticorrosive 30 arrange | positioned there, and the molten anticorrosive 30 spreads to the periphery centering on the exposed part 16a, 16b. But a heat ray may be radiated | emitted so that it may aim at one linear area | region, without dividing the exposed parts 16a and 16b.

  During this heating, the terminal fitting portion 22 is cooled by supplying a coolant to the cavity portion 65. Accordingly, when the melted anticorrosive 30 tries to spread to the terminal fitting portion 22, the temperature is lowered and the solution is about to solidify. For this reason, it can suppress that the molten anticorrosive 30 flows into the terminal fitting part 22. FIG. Then, the stage 53 and the terminal-attached electric wire holding member 60 are moved from the heating position to the set position by driving of the terminal-attached electric wire moving mechanism 55, and cooling (forced cooling or natural cooling may be used). ), The anticorrosive 30 is solidified and the anticorrosion structure 32 is manufactured (see FIG. 3).

  According to the heating method and the radiant heating device 50 configured as described above, since the heated portions are heated by irradiating the exposed portions 16a and 16b and the granular anticorrosive 30, the anticorrosive application target location is relatively stable. It is easy to carry out local heating so that the temperature becomes the same. That is, if heating is performed by irradiating the exposed portions 16a and 16b and the granular anticorrosive 30 with heat rays, the heating can be performed under conditions that are not easily affected by the crimp contact state between the terminal 20 and the core wire end portion 16 or the like. For this reason, the anticorrosive application target location can be heated to a relatively stable temperature, and the application state of the anticorrosive 30 is stabilized.

  Further, the terminal-attached electric wire holding member 60 is configured to be able to hold a plurality of electric wires with terminals 10 in parallel, and the radiant heating unit 58 is an exposed portion 16a of the plurality of electric wires with terminals 10 held in parallel. The exposed portions 16a and 16b of the plurality of terminal-attached electric wires 10 and the granular anticorrosive 30 can be heated almost simultaneously, and the heating operation and anticorrosive 30 melting and coating operations can be performed efficiently.

  Moreover, since the exposed portions 16a and 16b and the granular anticorrosive 30 are heated while the terminal fitting portion 22 is cooled, the anticorrosive 30 melted by heating hardly flows into the terminal fitting portion 22. For this reason, it becomes difficult for the anticorrosive 30 to adhere to the terminal fitting part 22, and the connection failure etc. with the terminal fitting part 22 and other male terminals 28 grade | etc., Can be suppressed.

<Modification>
But the method and apparatus which implement the said anticorrosive supply process P1 or the heating process P2 are not restricted to the said example.

  FIG. 10 is an explanatory diagram showing a process of forming the granular anticorrosive 30. As shown in FIG. In the figure, the granular anticorrosive 30 is continuously formed using the plate member 110 having a smooth main surface and the anticorrosive discharge part 144. The plate member 110 is disposed at a fixed position in a posture in which a smooth main surface faces upward. The plate member 110 is disposed under a temperature condition capable of curing the melted anticorrosive 30, here, a room temperature condition. Similarly to the anticorrosive agent discharging unit 44, the anticorrosive agent discharging unit 144 is configured to be able to discharge the melted anticorrosive agent 30 by a preset amount. And the anticorrosive agent discharge part 144 repeats discharging the melt | dissolved anticorrosive 30 only by the preset amount in each stationary state, repeating the movement on the main surface of the board member 110, and a rest. Then, the discharged anticorrosive 30 is cooled and solidified on the main surface of the plate member 110 to be formed into a granular shape. Thereby, many granular anticorrosives 30 can be manufactured many continuously.

  The method of manufacturing the granular anticorrosive 30 can also be manufactured by other methods. For example, a method of cutting a long line anticorrosive into predetermined dimensions, or a method of manufacturing the anticorrosive by pouring into a mold can be employed.

  FIG. 11 is an explanatory view showing a process of selecting and taking out the granular anticorrosive 30 one by one. In the drawing, a sorting hole 252 is formed in a flat sorting plate 250. The sorting hole 252 is formed in a through hole having an outer diameter and a depth dimension corresponding to a particle size having a size corresponding to an amount suitable for application to the terminal-attached electric wire 10. The plurality of sorting holes 252 are formed so as to be arranged in a straight line at intervals in each of the plurality of rows. Also, below the sorting plate 250, a closing plate 254 that is positioned below each row of the sorting holes 252 and closes the lower opening of the sorting hole 252 slides (inserts / removes) along the extending direction of the row. It is arranged to be possible.

  Then, the produced plurality of granular anticorrosive agents 30 are supplied so as to flow onto the sorting plate 250, and the sorting plate 250 is shaken in the surface direction. Then, the granular anticorrosive 30 having a size that can be fitted into the sorting hole 252 is fitted into the sorting hole 252, and the granular anticorrosive 30 that cannot be fitted into the sorting hole 252 is separated from the sorting hole 252. It remains on the sorting plate 250 without being fitted in 252. Thus, by removing the granular anticorrosive 30 remaining on the sorting plate 250, it is possible to eliminate the granular anticorrosive 30 that is excessively applied to the terminal-attached electric wire 10.

  Then, as shown in FIG. 12, when the blocking plate 254 is shifted outward from the bottom of the sorting plate 250 in a state where the granular anticorrosive 30 is fitted in each sorting hole 252 as described above, The lower openings of the plurality of sorting holes 252 arranged in a line are opened sequentially, and the granular anticorrosive 30 fitted into the sorting holes 252 can be taken out sequentially.

  FIG. 13 is an explanatory view showing a process of disposing the produced granular anticorrosive 30 on the exposed portions 16a and 16b of the terminal-attached electric wire 10. FIG.

  As shown in the figure, the terminal-attached electric wire setting jig 310 is formed with a set recess 312 in which the terminal 20 portion of the terminal-attached electric wire 10 can be inserted and held in a fixed posture. A supply hole 314 is formed in an upper portion of the terminal-attached electric wire setting jig 310 corresponding to the exposed portions 16a and 16b. The supply hole 314 is formed in a through hole having a size that penetrates the upper surface of the terminal-attached electric wire setting jig 310 and the set recess 312 and allows the granular anticorrosive 30 to pass therethrough. When the granular anticorrosive 30 is supplied to the supply hole 314 from above the terminal-attached electric wire setting jig 310, the granular anticorrosive 30 passes through the supply hole 314 and is exposed on the exposed portions 16a and 16b of the terminal-attached electric wire 10. And the step of supplying the granular anticorrosive 30 is performed.

  Further, in the electric wire setting jig 310 with a terminal, a heat conduction member 316 that is easy to conduct heat, for example, a heat conduction member 316 formed of aluminum, copper, iron, or the like is disposed at a position below the core wire end portion 16. Has been. Then, a heating device 318 such as a hot plate is disposed below the terminal-attached electric wire setting jig 310, and the heat from the heating device 318 is passed through the heat conducting member 316 and the core wire crimping portion 24 and the core wire end portion 16 of the terminal 20. In the same manner as in the case shown in FIG. 3, the anticorrosive 30 is solidified in a state where it is applied in the form of a film on the surfaces of the exposed portions 16a and 16b by heating and melting the granular anticorrosive 30. The anticorrosion structure 32 is manufactured. Thereby, a heating process is implemented.

  FIG. 14 is an explanatory view showing another heating step. In the figure, heating is performed using a high temperature bath 350.

  In other words, the high-temperature tank 350 controls the heater so as to keep the internal space at the set temperature by measuring the temperature of the internal space and the heater that heats the internal space in the case 352 that is thermally insulated from the outside. The internal space of the high-temperature tank 350 is maintained at a temperature at which the anticorrosive 30 can be melted (for example, 130 degrees Celsius).

  And the electric wire 10 with a terminal which arrange | positioned the granular corrosion inhibitor 30 on the exposed parts 16a and 16b is arranged in the high temperature tank 350, for example by arranging on the pallet 360. Thereby, the exposed portions 16a and 16b and the granular anticorrosive 30 are heated, and the granular anticorrosive 30 is melted, and the anticorrosive 30 is applied to the surfaces of the exposed portions 16a and 16b as shown in FIG. The anticorrosion structure part 32 is manufactured by solidifying in the state of being applied in the form of a film.

  Thus, the heating of the exposed portions 16a and 16b and the granular anticorrosive 30 is based on the principle using heat rays (electromagnetic waves), the principle that heat is transmitted through a solid, the principle that heat is transferred through the movement of a fluid such as gas, etc. This can be done using various principles.

  Note that various methods and various configurations of the embodiment and the modification described above can be appropriately combined as long as they do not contradict each other. For example, after supplying the anticorrosive agent 30 using the anticorrosive agent supply device 40 shown in FIG. 4, heating by a heating device such as a hot plate or heating using a high temperature bath may be performed.

  In addition, after the formation and supply of the anticorrosive agent 30 by the method shown in FIGS. 10 to 13, heating using heat radiation by a halogen heater or the like, or heating using a high-temperature tank may be performed. Good.

DESCRIPTION OF SYMBOLS 10 Electric wire with a terminal 12 Electric wire 16 Core wire edge part 16a, 16b Exposed part 20 Terminal 22 Terminal fitting part 24 Core wire crimping part 30 Anticorrosive agent 32 Anticorrosive structure part 40 Anticorrosive agent supply apparatus 42 Electric wire support part with terminal 44 Anticorrosive agent discharge part 50 Radiation heating device 52 Electric wire support portion with terminal 58 Radiation heating portion 60 Electric wire holding member with terminal 62 Base end side holding portion 62a Groove portion 64 Front end side holding portion 64a Hole portion 65 Cavity portion P1 Anticorrosive supply step P2 Heating step

Claims (8)

A terminal is crimped to the electric wire, and the anticorrosive coating method for the electric wire with terminal is applied to the electric wire with terminal to which the core wire end of the electric wire and the terminal are different metals,
(A) granulating the anticorrosive and supplying it to the exposed portion of the end of the core wire;
(B) heating the exposed portion of the end portion of the core wire and the granular anticorrosive agent to melt the anticorrosive agent formed in a granular form and applying the film to the exposed portion of the end portion of the core wire; ,
An anticorrosive coating method for a terminal-equipped electric wire. An anticorrosive coating method for a terminal-attached electric wire according to claim 1,
In the step (a), the melted anticorrosive agent is discharged onto the exposed portion of the core wire end portion under a temperature condition where the melted anticorrosive agent can be cured. An anticorrosive coating method for a terminal-attached electric wire, which is a step of supplying while forming a granular anticorrosive. An anticorrosive coating method for a terminal-attached electric wire according to claim 1 or 2,
The said process (b) is a process of applying the anticorrosive agent of the electric wire with a terminal which is a process of irradiating the exposed part of the said core wire end part, and the granular said anticorrosive agent with a heat ray. It is the anticorrosive coating method of the electric wire with a terminal given in any 1 paragraph of Claims 1-3,
For the terminal having a crimping portion to be crimped to the electric wire and a terminal fitting portion to be connected to the other,
In the step (b), while the terminal fitting portion is cooled, the exposed portion of the end portion of the core wire and the granular anticorrosive agent are heated to melt the anticorrosive agent formed in a granular shape, An anticorrosive coating method for a terminal-attached electric wire, which is a process of coating the exposed portion of the end portion of the core wire in a film shape.   An anticorrosive-coated terminal-attached electric wire applied with an anticorrosive agent by the anticorrosive coating method for a terminal-attached electric wire according to any one of claims 1 to 4. An anticorrosive agent supply device that supplies a granular anticorrosive agent while forming a granular anticorrosive agent on the exposed portion of the core wire end portion of the terminal-attached electric wire whose terminal is crimped to the electric wire,
A terminal-attached electric wire support part that supports the electric wire with terminal under a temperature condition in which the melted anticorrosive can be cured;
The anticorrosive discharging part capable of discharging the melted anticorrosive to a predetermined amount, an exposed portion of the end of the core wire of the terminal-attached electric wire supported by the terminal-attached electric wire support, and
An anticorrosive supply device comprising: A radiant heating device that heats the exposed portion of the core wire end and the granular anticorrosive agent in the exposed portion at the end of the core wire of the terminal-attached electric wire with the terminal crimped to the wire. And
A terminal-attached electric wire support part for supporting the electric wire with terminal;
A radiant heating unit that emits heat rays toward the exposed portion of the core wire end of the terminal-attached electric wire supported by the terminal-attached electric wire support and the granular anticorrosive,
A radiant heating device. A radiant heating device according to claim 7,
The terminal-attached electric wire support portion includes a terminal-attached electric wire holding member capable of holding a plurality of electric wires with terminals in parallel,
The said radiation heating part is a radiation heating apparatus which radiates | emits a heat ray toward the linear area | region containing the exposed part of the core wire edge part of the some electric wire with a terminal hold | maintained in parallel, and the granular said anticorrosive agent.

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