JPH08195230A - Crimp terminal and method for crimping terminal - Google Patents

Abstract

PURPOSE: To deal with wires of different diameters using one kind of terminal in connecting them together. CONSTITUTION: An electrical contact portion 1 is projected at one end of a terminal 5, and a wire crimp portion 2 is horizontally projected in a flat plate shape at the other end. The wire crimp portion 2 is cut into the required length to match the diameter of wire and is curved into an approximately U shape. A crimp portion cutter 7, a crimp portion bender 8 and a crimping machine 9 are arranged in that order along the feed direction of a chain terminal 6, and the crimp portion is cut into the required length to match the wire diameter. The cutter 7 has a pair of rotatable cutting drums each of which has plural kinds of cutting blades with different cutting lengths. The crimp portion bender 8 has a pair of rotatable bending drums 24, 25. The crimping machine 9 has a rotatable crimp drum 31 which has plural kinds of crimp dies of different sizes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crimp terminal and a terminal crimping step for cutting a wire crimping portion of a terminal in accordance with various wire diameters in the process.

[0002]

2. Description of the Related Art FIG. 8 shows a terminal crimping method disclosed in Japanese Patent Laid-Open No. 3-147287. In this construction method, a chain terminal 61 formed by protruding a plurality of crimp terminals 44 in parallel on a chain band 43 is provided with a feed mechanism 45 and an upper anvil 46.
Between the lower crimper 47 and the lower crimper 47,
4. The stripping tip 52 of the wire 51 is set to the wire crimping portion 48 of the No. 4, and the anvil 46 is lowered by a cylinder (not shown) to caulkly connect the stripping tip 52 to the wire crimping portion 48 with the crimper 47. It is what makes me.

The crimp terminal 44 has a rectangular tubular electric contact portion 55 at the tip end thereof, and a pair of slightly taper-shaped core wire crimping pieces 49 and covered crimping pieces as electric wire crimping portions 48 at the base end portion. 50 and. The rear end of the coated crimping piece 50 is connected to the chain band 43 via a narrow piece 56. The chain belt 43
A rectangular engagement hole 58 for the feed pawl 57 of the feed mechanism 45 and a circular engagement hole 60 for the positioning pin 59 when the electric wire is crimped are formed at equal pitches in the longitudinal direction.

As described above, the stripping tip portion 52 of the electric wire 51 is crimp-connected to the electric wire crimping portion 48 between the two dies 46 and 47, that is, the conductor portion 53 is connected to the pair of core wire crimping pieces 49 and the covering crimping piece 50. The insulating coating portions 54 are crimped to the respective terminals, and at the same time, the narrow pieces 56 are cut to separate the terminals 44 and the chain bands 43. The terminal 44 can be set in the electric wire crimping machine without using the chain band 43 even in the state of the terminal 44 'having the core wire crimping piece 49' and the covering crimping piece 50 'as shown in FIG.

These terminals 44 and 44 'are shown in FIG.
As shown in (c), the respective heights of the core wire crimping piece 49 and the covering crimping piece 50 are set to various dimensions H _{1 to} H ₆ according to the diameter of the electric wire 51. Even in that case, the electric contact portion 55 is often formed in a constant shape and commonly used.

[0006]

However, in the above-mentioned conventional terminal crimping method, as shown in FIG. 11, the crimping machine 63 is used.
For example, when crimping and connecting an electric wire using the chain terminal 61, a plurality of types of reel-shaped chain terminals 61 _{1 to} 61 ₃ having different sizes and shapes of the wire crimping portion are prepared according to various wire diameters, and each chain is further provided. prepare terminals 61 ₁ to 61 more applicators (crimping die) comprising the anvil 46 and the crimper 47 which corresponds to ₃ 62 _{1-62 3,} these chained terminals 61 ₁ to 61 ₃ and the applicator 62 ₁ - 62 ₃ must be selectively used, which increases the manufacturing cost and the manufacturing man-hour of the terminal-equipped electric wire that composes the sub-harness and the like, and also increases the man-hour required for designing the crimp terminal.
Further, there has been a problem that management of a plurality of types of terminals is complicated and inventory is expanded.

In view of the above points, the present invention can reduce the manufacturing cost and the manufacturing man-hour in the crimping terminal which commonly uses the electric contact portion for the mating terminal and the terminal crimping method using the same, and also reduces the designing man-hour of the terminal. It is an object of the present invention to provide a crimp terminal and a terminal crimping method that can prevent the complication of terminal management and the expansion of inventory.

[0008]

In order to achieve the above object, according to the present invention, an electric contact portion for a mating terminal is formed on one side, and an electric wire crimping portion is formed on the other side so as to project horizontally in a flat plate shape. A crimp terminal that is used by cutting the wire crimp portion to a required length according to the wire diameter, and an electric contact portion for the mating terminal is completed on one of the crimp terminals, and a flat wire crimp portion is horizontal on the other. Formed by projecting in the direction, the electric wire crimping portion is cut into a required length according to the electric wire diameter, the cut electric wire crimping portion is bent and formed into a substantially U shape, and the electric wire is attached to the bent electric wire crimping portion. Adopts a terminal crimping method for crimp connection.

Further, in a terminal crimping method in which a chain terminal integrally molded with a plurality of crimp terminals is sent to a crimping machine, and an electric wire is crimped and connected to the crimping terminal by the crimping machine, in a crimping part cutting machine in the feeding direction of the chained terminal. And the crimping section bending machine and the crimping machine are sequentially arranged, and the flat wire crimping section of the crimping terminal protruding in the horizontal direction is cut into a required length by the crimping section cutting machine according to the wire diameter. It is also possible to bend and shape the cut wire crimping portion into a substantially U shape by the crimping portion bending machine.

Further, the crimping section cutting machine has a pair of rotatable cutting drums for the terminal crimping section, one cutting drum having a plurality of cutting blades having different cutting lengths, and the other drum. Has a plurality of types of receiving portions for the cutting blade,
The crimping section bending machine has a pair of rotatable bending drums with respect to the terminal crimping section, and the pair of bending drums have a plurality of types of convex and concave types of different sizes, and It is also effective that the crimping machine has a crimping drum which is rotatable with respect to the electric wire crimping portion, and the crimping drum has plural kinds of crimping molds having different sizes.

[0011]

[Operation] The electric contact part for the mating terminal is commonly used,
The electric wire crimping portion is used by being cut to an appropriate length according to the diameter of various electric wires to be connected in the electric wire crimping step. That is, it is cut by a crimping section cutting machine and is bent into a substantially U-shape by a crimping section bending machine to obtain a normal terminal shape. The crimping section cutting machine, the crimping section bending machine, and the respective drums of the crimping machine are selectively rotated according to various wire diameters, and after the wire crimping section is cut by the cutting blade and the receiving section, the convex type And the concave shape are bent into a substantially U shape. Then, the electric wire is crimped and connected by a crimping type.

[0012]

1 to 6 are conceptual views showing an embodiment of a terminal crimping method according to the present invention. In this method, as shown in Fig. 2 (a), only the electrical contact part 1 is processed into a rectangular tube shape, and the wire crimping part 2 is processed.
Is a reel-shaped chain terminal 6 having a crimping terminal 5 which is projected and extended horizontally in the form of a flat plate, and is sent to a crimping section cutting machine 7 of FIG. 1, and the cutting machine 7 causes the crimping terminal as shown by a chain line in FIG. 5, a pair of core wire crimping pieces 3 and a covering crimping piece 4 are cut into a required length according to the thickness of the electric wire 10, and then the cut crimping pieces 3'and 4'are folded into the crimping portion of FIG. The bending machine 8 rises and forms as shown in FIG. 2 (b), and finally, the crimping machine 9 crimps and connects the electric wire 10 to the crimping portion 2'formed by bending as shown in FIG. 2 (c). .

In the crimp terminal 5, the electrical contact portion 1 is punched and bent from a strip-shaped metal plate including the chain strip 20, and the wire crimp portion 2 is sent to the crimp portion cutting machine 7 in a state where it is punched and formed. . The crimping section cutting machine 7, the crimping section bending machine 8 and the crimping machine 9 are sequentially arranged in the feeding direction of the chain terminal 6 as shown in FIG. The cutting machine 7 is provided with a pair of upper and lower cutting drums 11 and 12 with respect to the chain terminal 6. The upper cutting drum 11 is vertically movable with respect to the lower cutting drum 12 by an elevating mechanism 13 such as a cylinder.

The upper cutting drum 12 has an outer periphery as shown in FIG.
Four types of cutting blades 14 with different concave sizes₁~
14_FourAre projected every 90 °. The cutting blade 14₁~
14 _FourIs a pair of sharp V-shaped blades 1 on both sides
6 has a concave portion for releasing the crimping piece between the two blade portions 16, 16.
It has a groove 17. On the outer circumference of the lower cutting drum 12,
Each cutting blade 14₁~ 14_Four15 corresponding to₁~
Fifteen_FourIs provided. Each receiving part 15₁~ 15_FourBlade
It has an escape groove 18 for the portion 16. The cutting blade 14₁
~ 14_FourAnd receiving part 15₁~ 15_FourBetween the crimp terminals 5
The wire crimping portion 2 is located. Then, as shown in FIG.
When the cutting drum 11 descends, the crimping pieces 3 to 4 move to the cutting blade 1.
The blade is cut between the pair of blade portions 16, 16.

The initial lengths of the crimping pieces 3 and 4 of the electric wire crimping portion 2 are lengths L ₁ and L corresponding to the electric wire having the largest diameter among the electric wires 10 to be used as shown by the chain line in FIG. 2 (a). _It is set to ₂ . Then, according to the wire diameter D (Fig. 2 (c)), the cutting drum 1
1 and 12 are rotated and the required cutting blade 14 is selected.
As shown by the solid line in (a), it is cut into lengths L ₃ and L ₄ that allow crimping and crimping. In the crimp terminal 5, the rear end of the coated crimp piece 4 is connected to the chain band 20 by a narrow piece 19 as in the conventional example.
A positioning pin hole 21 and a feed engagement hole 22 are formed in the chain band 20 at the time of crimping.

The terminal 5 ', which is obtained by cutting both the crimping pieces 3 and 4 to a required length, is sent to the crimping section bending machine 8 as shown in FIG. The folding machine 8 has a pair of upper and lower folding drums 24, 2 like the cutting machine 7.
Have 5. FIG upper folding drum 24 as 5 has a plurality of kinds of convex 26 _{1-26 4} having different sizes on the circumferential, lower folding drum 25 is concave corresponding to the convex 26 _{1-26 4} 27 _{1 to} 27 ₄ . The convex molds 26 _{1 to} 26 ₄ have a curved tip portion 28, and the concave molds 27 _{1 to} 27 ₄ have a curved bottom portion 29 with respect to the curved tip portion 28. The convex mold 26 ₁ ~
Between 26 ₄ and concave 27 _{1-27 4,} crimping piece 3,4 the required length L _3, L ₄ wire crimping portion 2 which is cut into 'is located. Then, the upper bending drum 24 is lowered by an elevating mechanism 30 (Fig. 1) such as a cylinder, and the wire crimping portion 2'is folded into a substantially U shape between the convex mold 26 and the concave mold 27 as shown in Fig. 4 (b). It is bent. In this state, as shown in FIG. 2B, the terminal has the same shape as that of the conventional terminal of FIG.

A terminal 5'formed by bending the wire crimping portion 2 '.
Is sent to the crimping machine 9 as shown in FIG. The crimping machine 9 has a crimping drum 31 which can be moved up and down by a lifting mechanism such as a cylinder (not shown). The crimping drum 31 has terminals 5'as shown in FIG.
And a plurality of types of anvils (upper pressure bonding type) 32 _{1 to} 32 ₄ having different sizes on the outer circumference. The crimper (lower crimp type) 33 for the anvils 32 _{1 to} 32 ₄ is commonly used. Then, the bent crimping portion 2'is located on the crimper 33, the electric wire 10 is set on the crimping portion 2 ', and the crimping portion 2'is set between the two molds 32 and 33 as shown in FIG. 4 (c).
Are crimped, and the electric wire 10 is crimped and connected. The narrow width portion 19 connecting the chain band 20 and the terminal 5'of FIG. 2 (b) is cut at the same time as crimping, so that the electric wire with terminal 34 is constructed as shown in FIG. 2 (c).

The terminal is not limited to the one connected to the chain band 20, but may be a crimp terminal 35 as shown in FIG. That is, the terminal 35 has a rectangular cylindrical electrical contact portion 36 for the mating terminal, and a flat wire crimp portion 38 extending rearward from the substrate portion 37 of the electrical contact portion 36, like the terminal 5. The wire crimping portion 38 includes a shorter core wire crimping piece 39 protruding in the horizontal direction and a longer covering crimping piece 40. The lengths of the core wire crimping piece 39 and the covering crimping piece 40 are
The lengths L ₁ and L ₂ are set to correspond to the largest diameter wire among the wires used. This terminal 35 is sent to the cutting machine 7 and the folding machine 8 of FIG.
The wire can be crimped with. Alternatively, the terminal 35 alone may be manually set in the cutting machine 7 and the folding machine 8 for processing.
According to these crimp terminals 5, 35, the crimp pieces 3, 4, 39,
By cutting 40 to a desired length, it is possible to reliably crimp-connect electric wires having different diameters.

[0019]

As described above, according to the present invention, in the terminal crimping step, the electric wire crimping portion is cut into an appropriate length corresponding to various electric wire diameters and is used, so that one kind of terminal or one kind By preparing only the chain terminal of, it is possible to perform crimp connection for all used electric wires. Therefore, it is not necessary to prepare multiple types of terminals and chain terminals as in the past, which reduces manufacturing costs and man-hours, reduces man-hours required to design crimp terminals, and facilitates terminal management and inventory. Decrease.

Also, since the setup work corresponding to the wire diameter can be easily carried out by rotating the crimping section cutting machine, the crimping section bending machine, and the respective drums of the crimping machine, it is possible to replace the applicator of the conventional crimping machine. There is no trouble, and workability and productivity are improved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a terminal crimping method according to the present invention.

2A to 2C are plan views sequentially showing a process of processing a wire crimping portion of a terminal.

FIG. 3 is a front view showing a cutting drum of the crimping machine.

4 (a) to 4 (c) are vertical cross-sectional views sequentially showing a process of processing an electric wire crimping portion.

FIG. 5 is a front view showing a folding drum of the crimping section folding machine.

FIG. 6 is a front view showing a crimping drum of the crimping machine.

FIG. 7 is a perspective view showing a single crimp terminal.

FIG. 8 is a perspective view showing a conventional terminal crimping method.

FIG. 9 is a perspective view showing a conventional crimp terminal alone.

10 (a) to 10 (c) are side views showing conventional terminals having different heights of the wire crimping portion.

FIG. 11 is a front view showing a conventional terminal crimping method.

[Explanation of symbols]

1,36 electrical contact 2, 38 wire crimping portion 5 and 35 crimping terminal 6 chained terminals 7 crimp portion cutter 8 crimp portion folding machine 9 crimpers 11, 12 the cutting drum 14 _{1-14 4} cutting blade 15 _{1-15 4} Receiving part 24,25 Bending drum 26 _{1 to} 26 ₄ Convex type 27 _{1 to} 27 ₄ Concave type 31 Crimping drum 32 _{1 to} 32 ₄ Crimping type

Claims (5)

[Claims] 1. An electric contact portion for a mating terminal is formed on one side, and an electric wire crimping portion is formed to horizontally project in a flat plate shape on the other side, and the electric wire crimping portion is cut to a required length according to an electric wire diameter. Crimp terminal characterized by being used. 2. A crimp terminal is provided with an electric contact portion for the mating terminal on one side, and a flat wire crimp portion is formed on the other side so as to project in the horizontal direction, and the crimp portion has a required length according to the wire diameter. A terminal crimping method characterized in that the wire is crimped and connected to the bent electric wire crimping portion by bending the cut electric wire crimping portion into a substantially U shape. 3. A terminal crimping method in which a chain terminal integrally molded with a plurality of crimp terminals is sent to a crimping machine, and an electric wire is crimped and connected to the crimping terminal by the crimping machine. And the crimping section bending machine and the crimping machine are sequentially arranged, and the flat wire crimping section of the crimping terminal protruding in the horizontal direction is cut into a required length by the crimping section cutting machine according to the wire diameter. Then, the terminal crimping method is characterized in that the cut electric wire crimping portion is bent and formed into a substantially U shape by the crimping portion bending machine. 4. The crimping section cutting machine has a pair of rotatable cutting drums for the terminal crimping section, one cutting drum having plural kinds of cutting blades having different cutting lengths, and the other drum. Has a plurality of types of receiving portions for the cutting blade, the crimping section bending machine has a pair of rotatable bending drums for the terminal crimping section, and the pair of bending drums have a plurality of different sizes. 4. A seed having a convex shape and a concave shape.
The terminal crimping method described. 5. The crimping machine has a crimping drum rotatable with respect to an electric wire crimping portion, and the crimping drum has a plurality of types of crimping molds having different sizes. Terminal crimping method.