JP3094138B2 - Barrel terminal and wire connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a barrel terminal provided with a terminal connecting portion and an electric wire connecting portion for crimping an electric wire, and an electric wire connecting device to the barrel terminal, and more particularly to an electric wire connecting device regardless of the diameter of the electric wire. The present invention relates to a terminal structure that can reliably perform crimp connection.

[0002]

2. Description of the Related Art There are various types of terminals, also called barrel terminals or crimp terminals, as described below. For example, the barrel terminal 1 shown in FIGS.
Is obtained by stamping a single metal plate to integrally form a terminal connection portion 2 and an electric wire connection portion 3.
The wire W is crimped and connected by crimping. The shape of the wire connection portion 3 before connecting the wire W is a shape that is opened longitudinally along the axis and has a substantially circular cross section.
When the electric wire W is connected, the core wire is removed by stripping the sheath, and a portion of the sheath and the core wire are inserted into the wire connection portion 3 and caulked with a dedicated jig. At this time, if the diameter of the electric wire W is large, the electric wire connection portion 3 cannot be sufficiently swaged. Then, the diameter of the electric wire W is, for example, 0.3 sq to 0.5 s.
In the case of about q, as shown in FIG. 15, an inner diameter of the wire connection portion 3 is used, and the diameter of the wire W is 0.85 sq or more.
In the case of about 1.25 sq, a wire connection part 3 having a large inner diameter was used as shown in FIG. Therefore, the user of this terminal needs to prepare various types of barrel terminals 1 in order to correspond to the diameter of the electric wire W.

On the other hand, barrel terminals 5 shown in FIGS.
Is a terminal connection part 6 to be screwed and fixed to the counterpart terminal.
And the electric wire connection portion 7, which can be said to be a pipe, in other words, a pipe type, is integrally molded. The inner diameter of the electric wire connection part 7 is always the same diameter, and when connecting the electric wire W, the electric wire W is inserted into the electric wire connection part 7 from the core wire in a state where the coating is removed. By caulking with a jig, a concave caulking mark 8 is formed. At this portion, the electric wire W cannot be pulled out, and the core wire is connected to the electric wire connection portion 7, that is, the barrel terminal 5 so as to be able to conduct electricity.

[0004]

In the barrel terminals 1 and 5 described above, since the inner diameters of the wire connection portions 3 and 7 are fixed, various types of terminals must be prepared according to the size of the wire W. . In addition, a special crimping standard is required for each size of the electric wire W, and the crimping type needs to be replaced every time the electric wire size changes. However, when a wrong crimping standard occurs, a connection error due to insufficient crimping and a terminal breakage due to excessive crimping are likely to occur. In addition, various problems have occurred, such as a decrease in work efficiency and an increase in material costs.

On the other hand, in Japanese Utility Model Laid-Open No. 48-73787,
A crimp terminal in which an inner diameter and an outer diameter of a cylindrical grip portion (corresponding to the wire connection portion) on the wire insertion side is enlarged is disclosed. However, since the inside diameter of the portion for caulking the inserted electric wire is fixed, the same problem as in the above-described conventional example occurs. Japanese Utility Model Laid-Open Publication No. Sho 50-121992 discloses a crimping terminal with a sleeve for crimping and connecting an electric wire by inserting a truncated conical sleeve into a cylindrical electric wire connecting portion, but the diameter of the electric wire connecting portion is determined. Therefore, it has the same problem as described above.

Japanese Unexamined Utility Model Publication No. 61-114686 discloses an example of a crimping apparatus and a crimping terminal to be crimped. Although the terminal has a wide end on the wire insertion side, it has a core wire. Since the diameter of the portion to be crimped is fixed to a certain size, it has the same problem as described above. Actual Kaihei 2-
Japanese Patent Publication No. 65869 discloses a contact pin in which a cut is provided in a cylindrical core wire lock portion, and the cut is closed using a locking ring after inserting the core wire of the electric wire. However, when the thickness of the core wire is smaller than the core wire lock portion, the electric wire cannot be connected. That is, it is necessary to use any of the conventional terminals according to the thickness of the electric wire, and the above-mentioned problem cannot be solved. An object of the present invention is to provide a barrel terminal and an electric wire connection device that can share a barrel terminal and a caulking type, thereby improving the efficiency of electric wire connection work and reducing equipment costs.

[0007]

A barrel terminal according to the present invention for achieving the above object has a terminal connecting portion to be connected to another terminal or the like, an opening side for inserting an electric wire having a large diameter, and a distal end. And conical wire connection that gradually decreases in diameter
Equipped, the wire connection part can insert wires regardless of wire diameter
It is characterized in that it is connected by caulking and caulking . In addition, the electric wire connection device according to the present invention for achieving the above object, the opening side into which the electric wire is inserted has a large diameter, and a fixing portion for mounting a conical electric wire connection portion having a gradually decreasing diameter toward the tip. The formed pedestal, descends on the wire connection portion placed on the fixed portion, pressurizes a plurality of positions of the wire connection portion with steps corresponding to the inclination of the wire connection portion, and is inserted into the wire connection portion. And a pressurizing member for connecting the electric wire to the electric wire connection portion by caulking , wherein the fixing portion positions the electric wire connection portion.
It is characterized by being formed in a tapered shape for positioning .

[0008]

In other words, in the above barrel terminal, the terminal connecting portion for inserting the electric wire is formed in a conical shape having a gradually decreasing diameter from the opening side toward the tip. Even if it is deeply inserted into the connection part and it is thick, it can be inserted to a position where it can not be inserted by contacting the inclined surface. The wire connection device presses a plurality of positions with steps corresponding to the inclination of the conical terminal connection portion, and connects the wire inserted into the terminal connection portion to the terminal connection portion by caulking. Therefore, even if the shape of the electric wire is thin or thick, the connection can be surely made.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. In the description of the embodiment, the configuration and the like of the barrel terminal will be described with reference to FIGS. 1 and 2, and then the configuration and connection method of the electric wire connection device will be described with reference to FIGS. The barrel terminal 11 is formed by processing a single metal plate into a sheet metal, and has a terminal connection portion 12 and an electric wire connection portion 13 integrated with each other. The terminal connection part 12 is configured so that a mating terminal in the form of a male tab can be inserted therein, and is called an F terminal by those skilled in the art. Note that the configuration of the terminal connection portion 12 is not limited to the example shown in the drawing, and is configured to be a male tab and inserted into a mating terminal, that is, a configuration called an M terminal by those skilled in the art. Is also good.

The wire connecting portion 13 has a conical shape or a tapered shape whose diameter gradually decreases from the opening side shown at the left end in FIGS. 1 and 2, that is, from the wire insertion opening 13a toward the tip end, ie, the wire insertion direction. Is formed. Therefore, the electric wire W
Is thinner, the electric wire W and the core wire W as shown by a solid line in FIG.
a can be inserted deeply into the wire connection portion 13,
When the electric wire W is thick, it is inserted shallowly as shown by the imaginary line. By forming the electric wire connection portion 13 in a conical shape in this manner, the insertion of the electric wire W is simplified, and the core wire Wa is securely inserted into the electric wire connection portion 13 and positioned regardless of the wire diameter. . The connection between the electric wire W and the barrel terminal 11 is performed by the connection device and the connection method described below.

The structure of the connection device 21 is roughly classified into a pedestal 22 having a substantially H-shaped planar shape, and a pressing member (hereinafter, referred to as a pressing member) for caulking the wire connection portion 13 of the barrel terminal 11 positioned on the pedestal 22. , And an applicator.) 23. On the upper part of the pedestal 22, a groove-shaped wire guide portion 24 and a tapered fixing portion 25 for positioning the wire connection portion 13 are continuously formed. An inclined portion 26 for mounting the terminal connection portion 12 is provided continuously. Therefore, FIG.
When the barrel terminal 11 is placed on the pedestal 22 as shown in (2), the wire connection portion 13 is placed in the fixed portion 25 in a fitted state. Since the lower surface of the terminal connecting portion 13 is formed in a flat plate as shown in FIG. 2 and the inclined surface 26 is also flat, the barrel terminal 11 is positioned and fixed on the base 22 as shown in FIG. The barrel terminal 11 does not roll and does not shift even if a force is applied during crimping. The guide portions 27 formed in a concave shape on both sides of the fixing portion 25 guide the applicator 23 described below, and allow the applicator 23 to enter.

The applicator 23 is formed in a substantially E-shape as viewed from one side as shown in FIG. 5, and is configured to descend toward the pedestal 22 as shown by an arrow A when caulking the barrel terminal 11. Have been. A tooth mold 31 is provided at the center of the lower surface of the applicator 23, and plate-like guide projections 32a and 32b are provided at predetermined intervals on both sides thereof. As shown in FIG. 6 which is a cross-sectional view taken along the line BB of FIG. 5, the tooth mold 31 has two protrusions 33a,
3b are provided at predetermined intervals. The two projections 33a and 33b are used to press and crimp the electric wire connection portion 13 from above, and the step H is set in accordance with the inclination angle of the electric wire connection portion 13. 33
The interval L between a and 33b is set in consideration of the inclination angle and the length of the electric wire connection portion 13. In particular, the projections 33a, 33
As shown in FIG. 2, the distance L between the wires W is different from the width of the wire W even when the length of insertion into the terminal is different due to the difference in the thickness of the wire.
(Covering) and the distance to be located on the core wire Wa, and the projections 33a and 33b are capable of always crimping the electric wire W (covering) and the core wire Wa together.
The guide projections 32a and 32b are used to press the
7 to prevent displacement of the applicator 23.

Next, a procedure for caulking the barrel terminal 11 will be described. When the barrel terminal 11 is crimped, the barrel terminal 11 is transferred along the inclined portion 26 and positioned on the fixed portion 25 as shown by an arrow C in FIG. Next, as shown in FIG. 4, the electric wire W gripped by the electric wire feeder 34 is used.
Is sent toward the barrel terminal 11 positioned, and the electric wire W is inserted into the electric wire connection portion 13 from the electric wire guide portion 24 side. The electric wire feeder 34 includes a pair of holding members 35 that can be freely opened and closed.
a, 35b, the wire W is sandwiched, and after being sent by the movement amount according to the wire diameter described above with reference to FIG. 2, the wire W is separated. Wa is exposed. Thus, the barrel terminal 11
Is set, and the electric wire W is inserted.
When the applicator 23 is lowered as shown in FIG. 7, the guide projections 32a and 32b are fitted into the guide portions 27 as shown in FIG. The surface of the portion 13 is abutted, and then the pair of protrusions 33a and 33b are cut into the wire connection portion 13.
Then, after lowering the applicator 23 by a predetermined amount, the applicator 23 is raised to complete the work of caulking the barrel terminal 11.

Next, the barrel terminal 11 after crimping the electric wire will be described. A concave crimping mark 14 as shown in FIG. 8 is formed on the surface of the electric wire connection portion 13. This portion is depressed by the pressure of the pair of protrusions 33a and 33b, and the lower portion thereof is provided with a core wire Wa and an electric wire W as shown in FIG.
Is tightened. The electric wire W and the core wire Wa are the electric wire connection portion 1
3 is strongly pressed against the inner wall, so that the electric wire W cannot come out of the barrel terminal 11 and the core wire Wa is connected to be able to conduct electricity. By the way, the barrel terminal 11 in the present embodiment can be inserted regardless of the thickness of the electric wire W as described with reference to FIGS. Since the connecting device 21 can securely crimp the conical wire connection portion 13, the wires W having different thicknesses can be reliably connected to one type of the barrel terminal 11.

Next, a second embodiment of the present invention will be described with reference to FIGS. Barrel terminal 41 shown in FIG.
Is formed so that a screw insertion hole 43 is formed in the terminal connection portion 42 and can be screwed to another terminal. As in the first embodiment, the electric wire connecting portion 44 has a large diameter on the electric wire insertion side 44a and is formed in a conical shape whose diameter decreases toward the tip. In the barrel terminal 11 shown in FIG. 11, a terminal connection portion 42 is formed in a plate shape so as to be insertable and connectable to another terminal, and an electric wire connection portion 44 is formed in a conical shape as described above. In the barrel terminal 11 shown in FIG. 12, the terminal connection portion 42 is configured to receive another terminal similarly to the first embodiment, and the wire connection portion 44 is formed in the same manner as described above. Therefore, the electric wires W having different thicknesses can be inserted into the electric wire connection portion 44 in the same manner as described above, and can be connected by caulking as described below.

Next, the crimping state will be described. Even when the electric wire W shown in FIG. 13 is thin and the electric wire W is thick as shown in FIG. Since it is crimped as shown by 45, the core wire W
a is securely connected to the wire connection portion 44, in other words, the barrel terminal 4
1 can be connected. Such crimping is performed by the fixing portion 25
This can be achieved by providing a single protrusion on the lower surface of the tooth mold 31 described with reference to FIG.

[0017]

As described above, in the barrel terminal according to the present invention, the terminal connecting portion for inserting the electric wire is formed in a conical shape whose diameter gradually decreases from the opening side toward the tip.
When the diameter of the electric wire is small, the electric wire is inserted deeply into the terminal connection portion, and even when the electric wire is thick, the electric wire can be inserted to a position where it cannot be inserted by contacting the inclined surface. Therefore, regardless of the diameter of the electric wire, the electric wire can be electrically connected to the electric wire connection portion by being inserted into the electric wire connection portion and swaged. As a result, it is not necessary for the user to prepare various types of barrel terminals according to the difference in the diameter of the electric wire, and inventory management and process setup are facilitated. In addition, the electric wire connection device that performs the caulking can be shared, so that it is possible to reduce the facility cost, save time and effort for exchanging jigs, and improve workability. An electric wire connection device according to the present invention mounts a conical electric wire connection portion at a fixed position on a pedestal and lowers a tooth mold having a plurality of protrusions having steps corresponding to the inclination of the electric wire connection portion. This is to pressurize the wire connection portion and crimp and connect the wire inserted into the wire connection portion. Therefore, regardless of the diameter of the electric wire inserted into the electric wire connection portion, the crimped connection is reliably performed, and the reliability of the product using the barrel terminal can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a barrel terminal according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a configuration of a barrel terminal.

FIG. 3 is a perspective view showing a shape of a pedestal constituting the electric wire connection device.

FIG. 4 is a perspective view showing a state of fixing a barrel terminal and inserting a wire.

FIG. 5 is a perspective view showing a configuration of an electric wire connection portion.

FIG. 6 is a sectional view showing a configuration of a tooth mold.

FIG. 7 is a perspective view of the electric wire connection device showing an operation at the time of caulking.

FIG. 8 is a perspective view of a barrel terminal showing a crimping state.

FIG. 9 is a cross-sectional view of the barrel terminal showing a crimping state.

FIG. 10 is a perspective view of a barrel terminal according to a second embodiment of the present invention.

FIG. 11 is a perspective view showing another shape of the barrel terminal.

FIG. 12 is a perspective view showing another shape of the barrel terminal.

FIG. 13 is a cross-sectional view showing a crimping state of an electric wire.

FIG. 14 is a perspective view showing a crimping state corresponding to the thickness of the electric wire.

FIG. 15 is a perspective view showing a conventional terminal structure.

FIG. 16 is a perspective view showing another example of the conventional terminal structure.

FIG. 17 is a perspective view showing another example of a conventional terminal structure.

FIG. 18 is a sectional view showing a conventional terminal structure.

FIG. 19 is a perspective view of a terminal showing a conventional crimping state.

[Explanation of symbols]

 11, 41 Barrel terminal 12, 42 Terminal connection part 13, 44 Wire connection part 21 Wire connection device 22 Pedestal 23 Pressing member (applicator) 24 Wire guide part 25 Fixed part 26 Inclined part 27 Guide part 31 Tooth shape 32a, 32b Guide projection 33a, 33b Projection 34 Electric wire feeder W Electric wire Wa Core wire

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kenichi Katsumata 252 Kawashimada, Gotemba, Shizuoka Prefecture Inside Yazaki Parts Co., Ltd. (56) References JP-A-59-165390 (JP, A) JP-A-61-66388 (JP) , A) Japanese Utility Model Showa 62-145272 (JP, U) Japanese Utility Model Showa 48-73787 (JP, U) Japanese Patent Publication 55-37069 (JP, B1) Japanese Patent Publication 45-25053 (JP, B1) (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 43/04-43/058 H01R 4/18-4/20

Claims (2)

(57) [Claims] A terminal connection portion connected to another terminal or the like;
An opening side into which the wire is inserted has a large diameter, and a conical wire connection portion having a gradually decreasing diameter toward the tip is integrally provided with the wire connection portion.
The connecting part allows the wire to be inserted regardless of the wire diameter for crimping
A barrel terminal characterized by more connections . 2. A pedestal having a fixing portion for mounting a conical wire connection portion having a large diameter on the opening side into which the electric wire is inserted and having a gradually decreasing diameter toward the tip, and mounted on the fixing portion. The wire is lowered onto the wire connection portion, pressurizes a plurality of positions of the wire connection portion with a step corresponding to the inclination of the wire connection portion, and connects the wire inserted into the wire connection portion to the wire connection portion by caulking. Pressurizing member , wherein the fixing portion is configured to
An electric wire connecting device formed in a tapered shape for positioning .