JP4475100B2 - Electrical connection terminal mounting structure and manufacturing method thereof - Google Patents

Description

  The present invention relates to an insulating tube and a method for manufacturing the insulating tube.

FIG. 8 shows an electric wire fixing method for caulking and fixing a cord 105 used for wiring of an electric circuit, that is, a covered electric wire, to a terminal for electric connection. In this case, the cord 105 is fixed to the terminal 102 for electrical connection, the insulation barrel 103 of the terminal 102 is caulking and fixing the insulating tube 106, and the wire barrel 109 is caulking and fixing the copper wire 110.
Such a fixing method is disclosed in Patent Document 1, for example.

Japanese Patent Laid-Open No. 11-283720

However, some of the conventional insulating tubes have a problem that the insulating tube is easily detached from the terminal.
Since the insulating tube may be formed using a material that has a smooth surface and is slippery, pulling such an insulating tube, that is, applying a force in the direction opposite to the terminal, causes the insulating tube to be connected to the terminal with a relatively small force. It will come out of the insulation barrel and will no longer play the role of electric wire insulation.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide an insulating tube that is difficult to come off from a terminal for electrical connection.

In order to solve the above-mentioned problems, an electrical connection terminal mounting structure according to the present invention is an electrical connection terminal mounting structure including an electric wire, an insulation tube, and an electrical connection terminal, the insulation tube Is a covering portion that covers the electric wire, and an enlarged end portion that is formed of the same material as the covering portion and has a portion that covers the electric wire, and has an outer diameter larger than that of the covering portion. have a, for electrical connection terminal has a wire barrel portion for caulking the electric wire, and an insulation barrel portion for caulking the covering portion, the expanded end portion is caught by the insulation barrel portion.
The enlarged end portion of the insulating tube has an outer diameter larger than that of the covering portion, and is difficult to come out because it is caught by a terminal or the like.

Moreover, the manufacturing method of the attachment structure of the terminal for electrical connection which concerns on this invention is a manufacturing method of the attachment structure of the terminal for electrical connection which consists of an electric wire, the insulation tube which coat | covers a part of electric wire, and the terminal for electrical connection. a is, the insulating tube is cut by the heated metal plate, thereby forming at least one insulating tube, the metal plate which is heated at one end by contact, to expand the outer diameter of the end Forming the enlarged end, caulking and fixing the wire to the electrical connection terminal, and caulking and fixing the portion other than the enlarged end of the insulating tube to the electrical connection terminal so that the enlarged end is caught. Including .
In the manufacturing method of the electrical connection terminal mounting structure , after cutting the tube by a heat cutter or the like, the diameter of the cut end is expanded by the heat cutter or the like.

Furthermore, the manufacturing method of the electrical connection terminal mounting structure according to the present invention is an electrical connection terminal mounting structure comprising an electric wire, an insulating tube covering a part of the insulated wire, and an electrical connection terminal. In this method, a conical member is brought into contact with at least one end of the insulating tube so that the tip of the member is located inside the insulating tube, the one end is deformed, the outer diameter is enlarged, and the enlarged end portion Forming an electrical connection, caulking and fixing the electric wire to the electrical connection terminal, and caulking and fixing the portion other than the enlarged end of the insulating tube to the electrical connection terminal, so that the enlarged end is caught. May be included .
In the manufacturing method of the electrical connection terminal mounting structure , a conical jig or the like is screwed to expand one end of the diameter.

In the method for manufacturing an electrical connection terminal mounting structure according to the present invention, one end may be heated by a conical member.
In the method for manufacturing the electrical connection terminal mounting structure , a heated conical jig or the like is brought into contact with one end to increase the diameter of one end.

Furthermore, the manufacturing method of the electrical connection terminal mounting structure according to the present invention is an electrical connection terminal mounting structure comprising an electric wire, an insulating tube covering a part of the insulated wire, and an electrical connection terminal. A method comprising: forming at least one notch in at least one end of an insulating tube, dividing the tip into a plurality of portions, and bending one end of the divided insulating tube outward in the radial direction of the insulating tube. By enlarging the outer diameter to form an enlarged end, caulking and fixing the electric wire to the electrical connection terminal, and caulking and fixing the portion other than the enlarged end of the insulating tube to the electrical connection terminal, Allowing the enlarged end to catch .
In the manufacturing method of this electrical connection terminal mounting structure , one end of the insulating tube is cut out and expanded in diameter.

Furthermore, the electrical connection terminal mounting structure according to the present invention may be manufactured by the above method.
By the above method, an enlarged end portion that has a larger outer diameter than the covering portion and is difficult to be removed because it is caught in the terminal or the like is formed.

  According to this invention, since the insulating tube has the enlarged end portion, it is difficult to come out from the terminal for electrical connection.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 shows the shape of an insulating tube 6 according to Embodiment 1 of the present invention.
The insulating tube 6 is hollow, and an electric wire, for example, a copper wire penetrates through the inside. The insulating tube 6 has a substantially equal-diameter covering portion 6c that covers the copper wire, and an enlarged end portion 6b that is spread in a trumpet shape at one end and has a larger outer diameter than the covering portion 6c. That is, the insulating tube 6 has an outer diameter larger than that of the covering portion 6c at the enlarged end portion 6b. In addition, the magnitude | size of the outer diameter and internal diameter in the expansion end part 6b can be designed according to the state at the time of attaching to the terminal for electrical connection mentioned later.

Next, a method for manufacturing the insulating tube 6 according to Embodiment 1 will be described with reference to FIGS. 3 and 4.
FIG. 3 shows the insulating tube 16 ′ and the heat cutter 50 before cutting.

  The heat cutter 50 is a metal plate having a flat blade and has a function of cutting a tube or the like when heated. By moving the heat cutter 50 in a direction substantially perpendicular to the insulating tube 16 'before cutting, that is, in the direction of the arrow b, the insulating tube 16' before cutting is cut.

FIG. 4 shows the state of the insulating tube after cutting. The insulating tube is cut by the heat cutter 50 and becomes an insulating tube 16 having a cut end 16a.
After cutting, the cut end 16a of the insulating tube 16 is brought into contact with the heat cutter 50 vertically along the axial direction thereof. That is, a force is applied to the insulating tube 16 in the direction of the arrow c. Thereby, the cutting end 16a is heated by the heated heat cutter 50, and further deforms when the heat cutter 50 comes into contact with it, and has the same shape as the enlarged end portion 6b shown in FIG. Thus, the insulating tube 6 is formed.
The enlarged end portion 6b includes a portion that covers the copper wire, like the covering portion 6c, and the copper wire penetrates the inside thereof.

A tube material suitable for such a manufacturing method is, for example, a fluorine tube. However, any material that can be insulated by covering a copper wire is composed of other materials such as PVC (vinyl chloride) and polyimide. May be.
Further, in the process of processing, the physical shape, chemical composition, etc. of a part of the insulating tube 6 may change, but even in this case, if the material before processing is the same, it was formed from the same material. Consider it a thing.

Next, with reference to FIGS. 2 and 7, attachment of the cord 5 including the insulating tube 6 according to the first embodiment to the electrical connection terminal (hereinafter simply referred to as “terminal”) 2 will be described. .
2 is a schematic view, and FIG. 7 is a perspective view, both of which show the same configuration. The cord 5 has a configuration in which the copper wire 10 passes through the insulating tube 6. Here, the copper wire 10 is a bundle of a plurality of wires, but this may be a single wire.

  The terminal 2 includes an insulation barrel portion 3, a wire barrel portion 9, and a contact portion 11. The insulation barrel portion 3 holds and fixes the insulating tube 6 by being caulked along the outer periphery of the insulating tube 6. The wire barrel portion 9 is caulked along the outer periphery of the copper wire 10, thereby holding and fixing the copper wire 10 and electrically connecting the copper wire 10 and the terminal 2.

A method for fixing the cord 5 to the terminal 2 will be described.
First, at one end of the cord 5, the copper wire 10 is protruded from the enlarged end portion 6 b to form a portion that is not covered with the insulating tube. Next, the enlarged end portion 6 b is disposed between the insulation barrel portion 3 and the wire barrel portion 9 of the terminal 2. At this time, the insulation barrel portion 3 is positioned on the covering portion 6c side and the wire barrel portion 9 is positioned on the copper wire 10 side as viewed from the enlarged end portion 6b.
Thereafter, the insulation barrel portion 3 and the wire barrel portion 9 are respectively crimped to realize the fixing and electrical connection of the cord 5 as described above.

  The insulation barrel portion 3 is fixed by caulking along the outer periphery of a portion of the insulating tube 6 where the outer diameter is not widened, that is, a portion other than the enlarged end portion 6b. Since the enlarged end portion 6b has a larger outer diameter than the covering portion 6c, the inner diameter of the crimped insulation barrel portion 3 is smaller than the outer diameter of the enlarged end portion 6b.

  As described above, the insulating tube 6 according to the first embodiment has the enlarged end portion 6b having a larger outer diameter than the covering portion 6c, so that the enlarged end portion 6b is caught by the insulation barrel portion 3, and the insulation barrel portion. 3 is difficult to remove. That is, the insulating tube 6 is held against a larger force with respect to a tensile force in the direction of the arrow a or a force applied in a direction in which the insulating tube 6 is separated from the terminal 2. Thereby, the insulation of the copper wire 10 is more reliably maintained.

In addition, since the insulating tube 6 does not use a fixing member such as a rubber cap when the terminal 2 is fixed by the insulation barrel portion 3, it achieves a high holding force with a small number of parts.
Furthermore, since cutting and deformation | transformation of the insulation tube 16 are performed with the heat cutter which is the same tool, the number of tools required for a process is reduced and a process is abbreviate | omitted.
In addition, since the cutting end 16a is heated and deformed by the heat cutter 50, the same shape as the enlarged end portion 6b can be formed with a small force when contacting.
Furthermore, since it processes after cut | disconnecting an insulating tube, the insulating tube of suitable length can be cut out and used.

The insulating tube 6 according to the first embodiment may form the enlarged end 6b at the same time in the process of forming the insulating tube. That is, after forming the tube having the same diameter over the entire length, the end portion is not expanded into a trumpet shape, but the shape of the enlarged end portion 6b may be integrally formed simultaneously with the tube formation by injection molding or the like. .
By carrying out like this, the process of processing the insulating tube 6 and forming the enlarged end part 6b separately can be omitted.

Embodiment 2. FIG.
In the second embodiment, a different manufacturing method of the insulating tube 6 according to the first embodiment will be described.

The manufacturing method of the insulating tube which concerns on Embodiment 2 is demonstrated using FIG.
The insulating tube 26 is cut by means such as a cutter and has a cut end 26a. The illustrated jig 60 is a member having a conical tip 60a.

The cut end 26 a is brought into contact with the tip 60 a of the jig 60. At this time, the axis of the jig 60 is inside the inner periphery of the insulating tube 26 and is substantially parallel to the axis of the insulating tube 26. That is, the tip 60 a of the jig 60 is located inside the insulating tube 26.
The jig 60 is fixed, and a force is applied to the insulating tube 26 in the direction of the arrow d. Or, conversely, the insulating tube 26 may be fixed and a force may be applied to the jig 60 in the direction opposite to the arrow d, or a force may be applied to both the insulating tube 26 and the jig 60. .

  In this way, by screwing the tip 60a of the jig 60 into the cut end 26a of the insulating tube 26, the diameter of the cut end 26a is expanded, and a shape having a large outer diameter similar to the enlarged end portion 6b of FIG. To do. Thus, an insulating tube is formed.

  In the second embodiment, since the jig 60 is screwed into the insulating tube 26, the enlarged end portion can be formed while more securely holding the inner diameter of the insulating tube 26 necessary for the copper wire 10 to pass therethrough. .

Note that the jig 60 does not have to be conical as long as it has a convex portion that can expand the diameter of the insulating tube 26. Furthermore, the direction and position of the shaft when the jig 60 is brought into contact with the insulating tube 26 are not limited to those described above, and may be any state as long as the diameter of the cut end 26a can be expanded.
In the second embodiment, the jig 60 may be heated to such an extent that the cut end 26a can be easily deformed. Thereby, when making it contact, the expansion end part 26b can be formed with a small force.

Embodiment 3 FIG.
FIG. 6 shows the shape of the insulating tube 36 according to Embodiment 3 of the present invention.
This insulating tube 36 differs from the insulating tube 6 of the first embodiment only in the shape and manufacturing method of the enlarged end portion 36b.

The enlarged end portion 36b is formed by opening one end of the insulating tube. First, the insulating tube is cut to an appropriate length, and then cut in a substantially axial direction from the cut end toward the insulating tube. By this cutting, the tip of the insulating tube is divided into a plurality of parts.
Next, an enlarged end portion is formed by bending the distal ends of the insulating tubes separated from each other by the incision toward the radially outer side of the insulating tube. This step is performed, for example, by screwing a jig having a conical tip as in the third embodiment.
In this way, the insulating tube 36 is formed by cutting and widening the tip.

  In the third embodiment, since the insulating tube is cut by a predetermined length and deformed, it is not necessary to heat, and the enlarged end portion 36b can be formed with a small force.

  In the third embodiment, the number of cuts is eight, for example, but this may be at least one. When there is a single cut, the end portion is cut and spread only at one place.

It is a figure which shows the shape of the insulating tube 6 which concerns on Embodiment 1 of this invention. It is the schematic which shows the attachment state to the terminal 2 of the insulating tube 6 which concerns on Embodiment 1 of this invention. It is a figure which shows the manufacturing method of the insulating tube which concerns on Embodiment 1 of this invention. It is a figure which shows the manufacturing method of the insulation tube which concerns on Embodiment 1 of this invention. It is a figure which shows the manufacturing method of the insulating tube which concerns on Embodiment 2 of this invention. It is a figure which shows the shape of the insulating tube which concerns on Embodiment 3 of this invention. It is a perspective view which shows the attachment state to the terminal 2 of the insulating tube 6 which concerns on Embodiment 1 of this invention. It is the schematic which shows the attachment state to the terminal 2 of the conventional insulation tube 106. FIG.

Explanation of symbols

  6 Insulating tube, 6b Enlarged end, 6c Covering part, 10 Electric wire (copper wire), 16, 16 ', 26 Insulating tube, 16a One end of insulating tube, 50 Heated metal plate (heat cutter), 60 Conical shape Member (jig).

Claims (6)

An electrical connection terminal mounting structure comprising an electric wire, an insulating tube, and an electrical connection terminal,
The insulating tube is
A covering portion for covering the electric wires,
The cover portion has a larger outer diameter than the covering portion and formed of the same material, comprising a portion for covering the electric wires, possess at least one end formed enlarged end portion of the cover portion,
The electrical connection terminal is:
A wire barrel portion for caulking and fixing the electric wire;
An insulation barrel portion for caulking and fixing the covering portion;
Have
The enlarged end is caught by the insulation barrel part
Mounting structure for electrical connection terminals . An electrical connection terminal manufacturing method comprising an electrical wire, an insulating tube covering a part of the electrical wire, and an electrical connection terminal,
And that the heated metal plate and cutting the insulating tube, thereby forming at least one end in the insulating tube,
Abutting the heated metal plate to the one end to enlarge the outer diameter of the one end to form an enlarged end;
Caulking and fixing the electric wires to the electrical connection terminals;
By caulking and fixing a portion other than the enlarged end portion of the insulating tube to the electrical connection terminal, the enlarged end portion is caught.
The manufacturing method of the attachment structure of the terminal for electrical connection containing this . A method for manufacturing an electrical connection terminal mounting structure, comprising an electrical wire, an insulation tube that covers a portion of the insulated electrical wire, and an electrical connection terminal,
A conical member is brought into contact with at least one end of the insulating tube so that the tip of the member is located inside the insulating tube, the one end is deformed, the outer diameter is enlarged, and an enlarged end portion is formed. Forming,
Caulking and fixing the electric wires to the electrical connection terminals;
By caulking and fixing a portion other than the enlarged end portion of the insulating tube to the electrical connection terminal, the enlarged end portion is caught.
The manufacturing method of the attachment structure of the terminal for electrical connection containing this . The method for manufacturing an electrical connection terminal mounting structure according to claim 3, wherein the one end is heated by the conical member. A method for manufacturing an electrical connection terminal mounting structure, comprising an electrical wire, an insulation tube that covers a portion of the insulated electrical wire, and an electrical connection terminal,
And said at least one end of the insulating tube, to form a cut of at least one, it divides the tip into a plurality,
Bending one end of the divided insulating tube outward in the radial direction of the insulating tube to enlarge the outer diameter to form an enlarged end;
Caulking and fixing the electric wires to the electrical connection terminals;
By caulking and fixing a portion other than the enlarged end portion of the insulating tube to the electrical connection terminal, the enlarged end portion is caught.
The manufacturing method of the attachment structure of the terminal for electrical connection containing this . An electrical connection terminal mounting structure manufactured by the method according to claim 2.

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