JP5606267B2 - Waterproofing and anticorrosion methods for electric wires with terminals - Google Patents

Description

  The present invention relates to a waterproof and anticorrosion method for a terminal-attached electric wire.

  2. Description of the Related Art Conventionally, a terminal-attached electric wire in which a conductor portion exposed by removing an electric wire covering is crimped with a terminal is known. As such an electric wire with a terminal, one that has been waterproofed by hot-melt molding of a terminal crimping portion has been proposed (see, for example, Patent Document 1).

  There has also been proposed a terminal-attached electric wire that is waterproofed by attaching a mold so as to surround the terminal crimping portion and injecting urethane foam into the mold (see, for example, Patent Document 2). Further, an ultraviolet curable first sealing material is dropped on the conductor portion of the electric wire from which the wire coating has been removed and the terminal is crimped, and a second sealing material is dropped on the first sealing material, There has also been proposed a terminal-attached electric wire that is waterproof and anticorrosive by irradiating the second sealing material with ultraviolet rays (see, for example, Patent Document 3).

JP 2006-286385 A JP 2007-52999 A No. 2007-13589

  However, in the electric wires with terminals described in Patent Documents 1 and 2, since hot melt or urethane foam is used, temperature management of the material is required. Further, when hot melt or urethane foam is used, the time required for cooling the hot melt or the time for curing the urethane foam is required, and the time until completion of the terminal-attached electric wire becomes long. Furthermore, in the electric wire with a terminal of patent documents 2 and 3, since the process of discharge and application | coating is performed, the shape and film thickness guarantee after a process will become difficult.

  The present invention has been made to solve such conventional problems. The object of the present invention is to eliminate the need for temperature management of materials, shorten the time to completion, and guarantee the shape and film thickness. It is an object of the present invention to provide a waterproof and anticorrosive method for a terminal-attached electric wire that can be easily made.

The waterproof and anticorrosion method for a terminal-attached electric wire according to the present invention is a waterproof and anticorrosion method for a terminal-attached electric wire obtained by crimping the exposed conductor portion with a terminal after removing the wire coating, and includes a thermoplastic resin, silicone rubber, elastomer, and A metal plate containing copper, aluminum, and tin is stacked on an insulating protective member composed of any one of a resin component mainly composed of at least one of a polyolefin-based resin and an ethylene-based copolymer. And laminating the parts so that the protective member is on the crimping part side with respect to the crimping part to which the terminal is crimped, and pressing the metal plate of the parts laminated by the laminating process on the crimping part side And a process.

  According to the waterproof and anticorrosion method for the electric wire with terminal, a component in which a metal plate is stacked on a protective member is laminated on a crimping portion to which a terminal is crimped, and this component is pressed against the crimping portion. It becomes worn and can be waterproofed and anticorrosive. In addition, it is not necessary to provide a temperature adjustment process in the above process, so that it is not necessary to manage the temperature of the material, and it is not necessary to wait for the material to cool or harden. Furthermore, there is no need for a material discharge or coating process. Therefore, it is not necessary to control the temperature of the material, the time to completion can be shortened, and the shape and film thickness can be easily guaranteed.

  Moreover, in the waterproof and anticorrosion method of the electric wire with terminal, it is preferable to further include a joining step of adhesively joining the protection member of the component and the metal plate prior to the lamination step.

  According to the waterproof and anticorrosion method for the electric wire with terminal, since there is a step of adhesively bonding the protective member and the metal plate prior to lamination, the positional relationship between the protective member and the metal plate is not easily broken during pressing. , It is possible to suppress the situation in which both are displaced.

  ADVANTAGE OF THE INVENTION According to this invention, the temperature control of material becomes unnecessary, and the waterproofing and anticorrosion method of the electric wire with a terminal which can make shape and film thickness guarantee easy while shortening the time to completion can be provided.

It is a block diagram which shows the electric wire with a terminal created by the waterproofing and anticorrosion method of the electric wire with a terminal which concerns on this embodiment, Comprising: (a) has shown the completed product, (b) has shown the decomposition | disassembly state. It is side sectional drawing of the electric wire with a terminal created by the waterproofing and anticorrosion method of the electric wire with a terminal which concerns on this embodiment.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings. FIG. 1 is a configuration diagram illustrating a terminal-attached electric wire created by the waterproof and anticorrosion method for a terminal-attached electric wire according to the present embodiment, in which (a) shows a finished product and (b) shows an exploded state. Show.

  As shown in FIGS. 1A and 1B, the electric wire with terminal 1 includes an electric wire 10 and a terminal 20, and the conductor portion 12 exposed by removing the covering 11 of the electric wire 10 is used as the barrel portion 21 of the terminal 20. It is crimped by crimping. The terminal 20 also has a covering barrel portion 22 for caulking the covering 11 of the electric wire 10.

  Moreover, as shown in FIG.1 (b), in this embodiment, the electric wire 1 with a terminal is equipped with the components 30 which consist of the metal plate 31 and the protection member 32, and this components 30 is pressed and fixed to a crimping | compression-bonding part. To prevent corrosion and waterproof. This component 30 has a protection member 32 on the crimping portion side of the terminal 20, and a metal plate 31 is laminated on the protection member 32.

  The metal plate 31 includes copper, aluminum, and tin. The protective member 32 is an insulating material composed of any one of a thermoplastic resin, a silicone rubber, an elastomer, and a resin component mainly composed of at least one of a polyolefin-based resin and an ethylene-based copolymer. It is a member.

  Here, examples of the elastomer include ethylene copolymers, styrene elastomers, thermoplastic polyester elastomers, and thermoplastic polyamide elastomers.

  Examples of the polyolefin resin include low density polyethylene, high density polyethylene, metallocene polyethylene, and styrene elastomer. Furthermore, examples of the ethylene copolymer include an ethylene-α olefin copolymer, an ethylene-propylene rubber, an ethylene butadiene rubber, an ethylene-vinyl acetate copolymer, and an ethylene-ethyl acrylate copolymer.

  Next, a waterproofing and anticorrosion method for the electric wire with terminal 1 according to the present embodiment will be described. First, the metal plate 31 and the protection member 32 are prepared, and these are adhesively bonded. Thereby, the position shift with the metal plate 31 and the protection member 32 is prevented. Then, the component 30 composed of the metal plate 31 and the protection member 32 is laminated on the crimping portion.

  Thereafter, the component 30 is pressed toward the crimping portion. Thereby, the component 30 which consists of the metal plate 31 and the protection member 32 will protect a crimping | compression-bonding part. In particular, the protective member 32 of the component 30 is abraded into the conductor portion 12 of the crimping portion, so that waterproofing and corrosion prevention can be achieved.

  Here, the protection member 32 has a U-shaped cross section. For this reason, in more detail, the component 30 is arranged such that the front protrusion 32a of the protection member 32 enters the recess 20a of the terminal 20 and the rear protrusion 32b is positioned on the rear end side of the covering barrel portion 22. Press. Thereby, the protection member 32 will be located so that the front and back of a crimping | compression-bonding part may be wrapped, and the water stop effect can be improved.

  FIG. 2 is a side cross-sectional view of the terminal-attached electric wire created by the waterproof and anticorrosion method for the terminal-attached electric wire according to the present embodiment. In particular, as shown in FIG. 2, when the terminal 30 is crimped, the positions of the wire covering 11 and the recessed portion 20 a of the terminal 20 are shifted vertically and have a stepped structure. For this reason, the situation which the water stop effect becomes small by the level | step difference by positioning and pressing the protrusions 32a and 32b before and after the protection member 32 as described above is prevented.

  Next, the waterproof and anticorrosion method according to the present embodiment and the difference from the prior art will be described. First, in this embodiment, after crimping the terminal 20 to the electric wire 10, the processing time for anticorrosion and waterproofing is about 0.2 to 1.0 seconds. On the other hand, in the case of the technique described in Patent Document 1, the processing time is about 15 to 60 seconds, and in the case of the techniques described in Patent Document 2 and Patent Document 3, the processing time is about 10 to 30 seconds. For this reason, in the waterproofing and anticorrosion method according to this embodiment, it can be said that the time until completion is shortened without cooling or curing time.

  Furthermore, in the present embodiment, the shape / membrane pressure guarantee is easy, but the shape / membrane pressure guarantee is not possible with the techniques described in Patent Document 2 and Patent Document 3, or it can be performed by dedicated equipment, or confirmed. Long warranty time. For this reason, in the waterproofing and anticorrosion method according to the present embodiment, it is possible to easily ensure the shape and film thickness.

  Thus, according to the waterproof and anticorrosion method for the electric wire with terminal 1 according to the present embodiment, the component 30 in which the metal plate 31 is stacked on the protective member 32 is laminated on the crimping portion to which the terminal 20 is crimped. Since the component 30 is pressed against the crimping portion, the protection member 32 is worn into the conductor portion 12, so that waterproofing and corrosion prevention can be achieved. In addition, it is not necessary to provide a temperature adjustment process in the above process, so that the temperature management of the material becomes unnecessary, and it is not necessary to wait for the material to cool or harden. Furthermore, there is no need for a material discharge or coating process. Therefore, it is not necessary to control the temperature of the material, the time to completion can be shortened, and the shape and film thickness can be easily guaranteed.

  Moreover, since the metal plate 31 is disposed on the protection member 32 as well as using the protection member 32, the protection member 32 can be protected by the metal plate 31, and the component 30 can be protected by a terminal crimping machine. Can be pressed.

  Moreover, since it has the process of adhesively bonding the protection member 32 and the metal plate 31 prior to lamination, the positional relationship between the protection member 32 and the metal plate 31 is unlikely to collapse during pressing, and the two are displaced. Can be suppressed.

  In the present embodiment, the metal plate 31 can be overlaid on the protective member 32 to form a part, and management and the like are easy. Further, the size of the component 30 is not so large.

  Furthermore, since lamination and pressing are performed, it is only necessary to divert or improve conventional equipment, and no special equipment is required. In addition, since no adhesive is used, the adhesive does not flow down and the shape is easily maintained.

  In addition, since the terminal-attached electric wire 1 is not exposed to heat or ultraviolet rays, the coating 11 does not deteriorate.

  As described above, the present invention has been described based on the embodiment, but the present invention is not limited to the above embodiment, and may be modified without departing from the gist of the present invention.

  For example, in the present embodiment, the component 30 is adhesively bonded in advance. However, the present invention is not limited to this, and the metal plate 31 may be simply laminated on the protective member 32 and pressed.

DESCRIPTION OF SYMBOLS 1 ... Electric wire with terminal 10 ... Electric wire 11 ... Cover 12 ... Conductor part 20 ... Terminal 21 ... Barrel 22 ... Cover barrel part 30 ... Component 31 ... Metal plate 32 ... Protection member

Claims (3)

A method for waterproofing and anticorrosion of an electric wire with a terminal obtained by crimping a conductor portion exposed by removing a wire covering with a terminal,
On an insulating protective member composed of any one of a thermoplastic resin, a silicone rubber, an elastomer, and a resin component mainly composed of at least one of a polyolefin-based resin and an ethylene-based copolymer, Laminating step of laminating a component in which metal plates containing copper, aluminum and tin are stacked so that the protective member is on the crimping part side with respect to the crimping part to which the terminal is crimped;
A pressing step of pressing the metal plate of the component laminated by the laminating step to the crimping portion side ;
A method for waterproofing and anticorrosion of electric wires with terminals, characterized by comprising: The waterproof and anticorrosion method for a terminal-attached electric wire according to claim 1, further comprising a joining step of adhesively joining the protective member of the component and the metal plate prior to the laminating step. The protective member has a U-shaped cross section having a front protrusion and a rear protrusion,
The terminal has a barrel portion for caulking the conductor portion, a concave portion on the front end side than the barrel portion, and a covering barrel portion for caulking the wire coating,
In the stacking step, the component is stacked on the pressure-bonding portion so that the front protrusion enters the recess and the rear protrusion is located on the rear end side of the covering barrel portion.
The waterproof and anticorrosion method for a terminal-attached electric wire according to any one of claims 1 and 2.

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