JP2001043909A - Crimp terminal for cable and terminal crimp tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crimp terminal provided with sharp protuberances on the entire inner surface of a wire barrel to make conducting possible without peeling off an insulating coating part, with a simple structure, and to provide a crimp tool capable of breaking a part of the wire barrel of the crimp-style terminal by crimping of a crimping machine provided with a protuberance on its inside. SOLUTION: In a conductive connecting tool to crimp the tip part of a cable 9 without peeling off an insulating coating part 12, a wire barrel is provided so as to embrace an insulating material coating the periphery of a cable end part 10 and sharp protuberances 4 are provided on the entire inner surface of the barrel, in order to crimp this crimp terminal. In relation to a conductive conventional connecting tool to crimp the tip part of the cable without peeling off the insulating coating part 12, one or several protuberances 7 are provided on the inside of an existing crimp machine, a part of the wire barrel of the crimp terminal is broken by crimping of the crimping machine to break the insulating coating part 12 at the tip of the cable, and the part of the wire barrel of the crimp terminal can be forced into direct contact with a core wire 11 by this terminal crimp tool.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a cable crimp terminal and a terminal crimping tool which are electrically connected by crimping a distal end portion of a cable. The present invention relates to a cable crimp terminal and a terminal crimp tool that can be crimped without stripping.

[0002]

2. Description of the Related Art Conventionally, an electric wire in which an insulating covering portion at a tip end portion of an electric wire is completely peeled off and a crimp terminal is crimped and attached thereto is disclosed in, for example, Japanese Patent Application Laid-Open Nos. 7-296860 and 6-2.
No. 60219 is known. However, in the case of an enameled wire, since the enamel is baked and painted, it is not easy to remove the enamel. Japanese Unexamined Patent Publication No. Hei 7-296860 that solves this problem exists. The outline of this is that at least one through hole is formed in the center of a wire barrel for crimping the tip of an electric wire, and the edge of the through hole is formed. Have a structure that protrudes in the direction of crimping the electric wire to form an edge.

The outline of Japanese Patent Application Laid-Open No. Hei 6-260219 is an electric wire crimping metal fitting that is insulated and electrically connected to a core portion of an exposed electric wire by stripping an insulating coating. The crimp fitting has a structure in which cut-and-raised projections that bite into the core portion of the electric wire during the crimping are integrally provided.

[0004]

However, both the former and the latter of the prior art have a problem that they cannot be made unless the insulating coating member of the electric wire is peeled off.

The present invention has been made in view of the above-mentioned circumstances, and has a simple configuration, which enables electrical conduction without stripping an insulating coating portion. A crimp terminal for a cable having sharp projections provided on the entire inner surface of a wire barrel. , And a projection is provided inside the crimping machine,
It is an object of the present invention to provide a crimping tool capable of breaking a part of a wire barrel of a crimp terminal by crimping of the crimping machine.

[0006]

In order to solve the above-mentioned problems, the present invention employs the following technical means. According to the first aspect of the present invention, in a conductive connector for crimping a distal end portion of a cable in a state where an insulating coating portion is not peeled off, a wire is provided so as to embrace an insulator covering the periphery of the cable end. A technical measure was adopted in which a barrel was provided, sharp projections were provided on the entire inner surface of the wire barrel, and pressure was applied.

[0007] According to the second aspect of the present invention, the first aspect is provided.
In addition to the described invention, a technical means is employed in which a triangular pyramid, a quadrangular pyramid, a pentagonal pyramid or the like is used to form a cutout on the outer peripheral surface of the wire barrel with a pyramid punch to form a sharp projection on the entire inner surface of the wire barrel. .

According to the third aspect of the present invention, in the conductive connector for crimping the distal end of the cable in a state where the insulating coating is not peeled off, the insulator covering the periphery of the cable end can be embraced. In a state where the wire barrel is provided as described above, in a state where the wire barrel is developed, a saw-tooth-shaped projection is formed at an end, and this is rounded into a cylindrical shape, and the projection is bent and raised to be crimped. .

According to the fourth aspect of the present invention, one or several existing conductive crimping machines are provided inside the existing crimping machine with respect to the conventional conductive connecting crimping device for crimping the distal end of the cable without stripping the insulating coating. This crimping machine is used to break a part of the wire barrel of the crimp terminal and break the insulation coating at the end of the cable so that a part of the wire barrel of the crimp terminal can directly contact the core wire. A technical means called a terminal crimping tool was adopted.

[0010]

Next, a specific embodiment of the present invention will be described in detail with reference to the drawings. Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
1 is a developed plan view of a cable crimp terminal 1 made of a metal plate such as copper or a copper alloy as a cable crimp fitting.

A connecting portion 2 is provided at one end, and a crimping portion 3 is provided at the other end. Further, when the crimping portion 3 is rounded into a cylindrical shape, a cut-and-raised projection 4 is provided integrally so as to protrude from the inner surface.

When the cable crimp terminal 1 is joined to an electric wire, the core wire 11 is held and pressed without peeling off the insulating coating 12 of the cable end 10 to penetrate the insulating coating 12. As a result, it is possible to obtain an electrical connection between the cable 9 and the cable crimp terminal 1 by making the core wire portion 11 bite.

Further, as shown in FIG. 2, by inserting the cable 9 into the cable crimp terminal 1 and crimping it, the joint area between the core portion 11 of the cable 9 and the cable crimp terminal 1 can be increased. When the cut-and-raised protrusions 4 bite, the effect of stripping and removing the oxide film on the surface of the core wire portion can be exhibited, and the contact resistance at the cable connection portion can be effectively reduced.

Next, a second embodiment will be described with reference to FIGS. As shown in FIG. 3, a saw-shaped protrusion 5 is formed at an end of the crimping portion 3, and the saw-shaped protrusion 5 is bent at a right angle by 90 degrees. As in the example, the cable 9 penetrates through the insulating coating portion 12 and cuts into the core wire portion 11 to enable electrical connection.
This is performed by combining with the cable 9 and crimping as shown in FIG.

Next, the crimping tool 6 will be described with reference to FIGS. The cable 9 is inserted into a conventional crimp terminal without cutting and raising the crimp terminal and forming the protrusion 4 or the saw-shaped protrusion 5 as in the cable crimp terminal 1 of the first and second embodiments. When crimping is performed, the crimping portion 3 of the crimping terminal is broken by the protrusion 7 and the receiver 8 provided on the crimping tool 6 by the sharp protrusion 7. Contact, thereby
This makes it easy to conduct electricity.

Further, as shown in FIG. 7, the shape of the blade portion of the punch which forms the shape of the cut-and-raised projection can be considered. 7A is a cone, FIG. 7B is a triangular pyramid, FIG. 7C is a quadrangular pyramid, FIG. 7D is a star pyramid, FIG.
7E is a triangular prism using a plate, and FIG.
FIG. 7 (g) shows a case where the plate body of FIG. 7 (e) is used in a wave form, and FIG.

Next, as shown in FIG. 8, the shape of the crimping portion of the crimping tool is shown. In FIG. 8 (a), the protrusion is formed on the crimping portion of the crimping tool for forming the cut-out projection. 8 (b), a male projection is provided on the upper side, a female recess is provided on the lower side, and a male projection is provided on both the upper and lower sides in FIG. 8 (c). Shown respectively.

The shape and number of the crimping terminal 1 for a cable, the connecting portion 2 and the crimping portion 3 of the crimping terminal 1 for a cable, and the shape and number of the cut-and-raised protrusions 4 in the above embodiment are limited to those described above. What is necessary is just to determine suitably according to the cable etc. to be joined.

[0019]

According to the present invention, a cut-and-raised projection which penetrates through the insulating coating portion of the cable and bites into the core wire portion at the time of crimping is provided integrally based on the above structure. The work can be performed very easily without having to peel off in advance. In addition, when crimped by the protrusion formed on the crimping portion, it bites into the insulating coating portion and the core wire portion, so that it is locked and also has a function of retaining.
In addition, the joint area between the core part of the cable and the crimp terminal for the cable can be increased, and the effect of stripping and removing the oxide film on the surface of the core part by the cut-and-raised projection can be exhibited, effectively reducing the contact resistance at the cable connection part. There is an advantage that can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing an expanded state of a cable crimp terminal according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a cable connection state in the first embodiment of the present invention.

FIG. 3 is a plan view showing an expanded state of a cable crimp terminal according to a second embodiment of the present invention.

FIG. 4 is a perspective view showing a cable joining state in a second embodiment of the present invention.

FIG. 5 is a front view showing the crimping tool of the present invention.

FIG. 6 is a sectional view taken along the line AA in FIG. 5;

FIG. 7 is a schematic perspective view showing seven examples of the shape of a blade portion of a punch for forming a cut-and-raised protrusion of a crimping portion.

FIG. 8 is a schematic cross-sectional view of an essential part showing three examples of the shape of a crimping portion of a crimping tool.

[Explanation of symbols]

1 ‥‥ Crimping terminal for cable 2 ‥‥ Connecting part 3 ‥‥ Crimping part 4 ‥‥ Cut-out projection 5 ‥‥ Saw blade-shaped projection 6 ‥‥ Crimping tool 7 ‥‥ Protrusion 8 ‥‥ Receptacle 9 ‥‥ Cable 10 ‥ ‥ Cable end 11 ‥‥ Core wire 12 ‥‥ Insulation coating

Claims (4)

[Claims] 1. A conductive connector for crimping a tip end of a cable in a state where an insulating coating portion is not peeled off, wherein a wire barrel is provided so as to embrace an insulator covering the periphery of the cable end portion, A crimp terminal for a cable, wherein a sharp projection is provided on the entire inner surface of the wire barrel and crimped. 2. A sharp projection is formed on the entire inner surface of the wire barrel by cutting and raising the outer peripheral surface of the wire barrel with a triangular pyramid, quadrangular pyramid, pentagonal pyramid or other pyramid punch. The crimp terminal for a cable according to claim 1. 3. A conductive connector for crimping a distal end portion of a cable in a state where an insulating coating portion is not peeled off, wherein a wire barrel is provided so as to embrace an insulator covering the periphery of the cable end portion, A crimp terminal for a cable, characterized in that a saw blade-like projection is formed at an end in an expanded state of the wire barrel, the projection is rolled into a cylindrical shape, and the projection is bent and raised to be crimped. 4. A conventional conductive fitting for crimping a tip end of a cable in a state in which an insulating coating portion is not peeled off,
One or several protrusions are provided inside the existing crimping machine, and a part of the wire barrel of the crimp terminal is broken by the crimping of the crimping machine to break the insulating coating at the tip of the cable,
A terminal crimping tool characterized in that a part of a wire barrel of a crimp terminal can directly contact a core wire.