JP2000106259A - Device and method of crimping terminal for shielding wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve yields and to enhance workability. SOLUTION: A terminal insertion unit 50 is provided for properly inserting an inner terminal T1, which is temporarily inserted in an outer terminal T2 fed between an anvil and the crimper of a press device 26. The terminal insertion unit 50 is brought into action, to properly insert the inner terminal by a control unit 100 prior to caulking action. Therefore, the inner terminal T1 which is automatically and uniformly inserted in the normal insertion position is assembled at the spacer T3 of the outer terminal T2, and since the outer terminal T2 is caulked in this condition, the crimped condition of the outer terminal T2 is stabilized to improve the yield.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal crimping apparatus for a shielded wire and a terminal crimping method.

[0002]

2. Description of the Related Art In general, a terminal crimping apparatus includes a press unit having an anvil, a crimper, a slide cutter and the like, and a terminal transport unit for transporting terminals to the press unit. The terminal transport unit intermittently transports a terminal band in which terminals are connected in parallel or in series, in conjunction with a swaging operation of a press unit. On the other hand, the press unit crimps a barrel formed on a terminal by an anvil and a crimper, crimps the terminal to the electric wire supplied to the terminal, and separates the terminal crimped by the slide cutter from the terminal band. . The electric wire is supplied by an automatic system supplied by an electric wire supply device or by a manual system supplied by an operator. By the way, among terminals crimped to electric wires, there are also external terminals for shielded wires used for so-called high-frequency cables and the like (for example, Japanese Utility Model Laid-Open No. 4-23081, Japanese Utility Model Laid-Open No. 5-2798).
No. 3).

[0003] Generally, a shielded wire is one in which the outer periphery of a covered electric wire is covered with a conductive sheath, and the outer periphery of the conductive sheath is covered with an insulating sheath.
The inner terminal is crimped. The outer terminal for the shielded wire is crimped to the shielded wire while being connected to the conductive sheath, and covers the outer periphery of the terminal connected to the covered electric wire. Normally, in order to crimp the outer terminal to the shielded wire, the end of the shielded wire is stripped of the insulating sheath to expose the conductive sheath, and the conductive sheath is stripped of the insulating sheath. It is folded at the end.

Here, an annular spacer for insulation is provided between the outer terminal and the inner terminal.
It is fixed inside by the lance of the outer terminal. On the other hand,
The inner terminal is formed with a projection that is engaged with the inner periphery of the annular spacer. Then, in the shield wire terminal connection step, the inner terminal crimped to the shielded wire insulated wire is inserted into an annular spacer assembled in the outer terminal, and the protrusion is engaged with the inner peripheral surface of the annular spacer. After that, the external terminals are crimped.

[0005]

Conventionally, the operation of inserting the inner terminal into the annular spacer incorporated in the outer terminal has conventionally been performed manually. For this reason, the projection of the inner terminal often causes locking failure, and there is a problem that the yield is poor. Further, since the insertion load for locking the protrusion of the inner terminal to the annular spacer is relatively large, it is severe for the operator.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object to provide a terminal crimping apparatus and a terminal crimping method for a shielded wire having improved yield and good workability.

[0007]

In order to solve the above-mentioned problems, the present invention provides a method for manufacturing a semiconductor device, comprising: an end portion of a conductive sheath covered with an insulating sheath, the end portion being exposed from the end portion of the insulating sheath; For a shielded wire in which an inner terminal is pre-pressed to an end of a core wire of a covered electric wire covered with the conductive sheath, a spacer for assembling the inner terminal is incorporated and an end of the conductive sheath. A terminal crimping device for a shielded wire for crimping an external terminal to be electrically connected at a predetermined timing, comprising: a press unit having an anvil and a crimper for caulking the external terminal; A terminal transport unit for transporting a terminal band in which the outer terminals are continuous, and a terminal insertion for fully inserting an inner terminal temporarily inserted into the outer terminal fed between the anvil and the crimper. And a control unit for controlling the press unit and the terminal insertion unit so that the terminal insertion unit performs the main insertion operation of the inner terminal before the press unit performs the caulking operation by the anvil and the crimper. A terminal crimping apparatus for a shielded wire, characterized in that:

In the invention including the specific matter, before the outer terminal is crimped by the pair of press units and crimped to the shield wire, the terminal insertion unit fully inserts the inner terminal temporarily inserted into the outer terminal. Therefore, the inner terminal is assembled to the spacer of the outer terminal in a state where it is automatically and uniformly inserted into the regular insertion position, and is integrated with the outer terminal while electrical insulation is secured. In this state, the outer terminals are swaged at a predetermined timing, so that the crimped state of the outer terminals is stabilized, and the yield is improved.

The "predetermined timing" at the time of caulking the outer terminal may be a timing when the inner terminal is detected by a sensor and the press unit is automatically interlocked, and a switch mechanism such as a foot switch is used. May be the timing for manual driving. In a preferred embodiment, a terminal crimping unit in which the press unit and the terminal transport unit are unitized is detachably provided to the press device, and the operation of the terminal insertion unit is turned on according to the type of the terminal crimping unit. Further, there is further provided switching means for turning on / off.

In the invention including this specific matter, it is possible to switch the interlock so as to drive the terminal insertion unit only when the terminal crimping unit of the specific model is mounted on the press device. The terminal crimping unit can be widely used with the same press device. In another preferred embodiment, the terminal insertion unit includes a locking claw that can be locked to the inner terminal temporarily inserted into the outer terminal between the anvil and the crimper, and a locking position that locks the inner terminal. An engagement / disengagement drive mechanism for driving the engagement claw between a retracted position retracted from the inner terminal and an engagement / disengagement drive mechanism such that the engagement claw fully inserts the inner terminal temporarily inserted into the outer terminal. An insertion drive mechanism that drives the locking claw through the insertion drive mechanism, an advance / retreat drive mechanism that drives the engagement claw between the anvil and the crimper by driving the engagement claw through the insertion drive mechanism, and the advance / retreat drive mechanism A terminal receiver that is driven and receives the outer terminal when the inner terminal is fully inserted by the locking claw.

[0011] In the invention including this specific matter, the locking claw and the terminal receiver are introduced between the anvil and the crimper before the pressing step by the advance / retreat drive mechanism, and the terminal receiver receives the outer terminal. Next, the locking claw is displaced from the retracted position to the locking position by the engagement / disengagement driving mechanism, and locked to the inner terminal. Thereafter, the insertion driving mechanism drives the locking claw via the engagement / disengagement driving mechanism, and the locking claw cooperates with the terminal receiver to fully insert the inner terminal into the outer terminal. Here, since the terminal receiver receives the outer terminal, the outer terminal is stopped in a locked state, so that the insertion operation of the inner terminal is ensured.

In still another preferred embodiment, after the insertion driving mechanism has completed the main insertion operation, the locking claw is released before the engagement / disengagement driving mechanism drives the locking claw from the locking position to the retracted position. It is driven in the insertion direction. In the invention including this specific matter, the locking claw after the main insertion can be driven in the direction away from the inner terminal also by the insertion driving mechanism, so that the locking claw is formed in a hook shape and the opening of the outer terminal is opened. Even when the inner terminal is pushed further inward, the locking claw can be reliably retracted from the outer terminal after full insertion.

According to another aspect of the present invention, the end of the conductive sheath covered by the insulating sheath is exposed from the end of the insulating sheath and is covered by the conductive sheath. For the shielded wire, the inner terminal of which is pre-pressed to the core wire end of the covered electric wire, a built-in spacer for assembling the inner terminal and a predetermined outer terminal electrically connected to the end of the conductive sheath are provided. A terminal crimping method for a shielded wire for crimping at the timing of, temporarily inserting the inner terminal into the outer terminal at a press position where the outer terminal is crimped,
A method for crimping a terminal for a shielded wire, comprising crimping the outer terminal after the temporarily inserted inner terminal is fully inserted into the outer terminal. In the invention including this specific matter, since the inner terminal is fully inserted in a state where the outer terminal is locked, the insertion operation of the outer terminal is assured, and the yield is improved. Further, since the main insertion operation is performed at the press position of the outer terminal, it is possible to consistently automate the step of crimping the outer terminal after at least temporarily inserting the inner terminal into the outer terminal.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
A preferred embodiment of the present invention will be described in detail. FIG. 1 is a perspective view showing a schematic configuration of a crimping apparatus 10 according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a shielded wire which is an object of the crimping apparatus 10 of FIG. 1, and FIG. FIG. 4 is a perspective view showing a state before crimping by the terminal crimping unit 1, and FIG. 4 is a perspective view of a shield wire to which an outer terminal is crimped.

First, referring to FIG. 2 and FIG. 3, a shielded wire S to which the present invention is applied is a stranded wire S having conductivity.
1 is covered with an insulating covering portion S2, and the outer peripheral surface of the covering portion S2 is further covered with a braided sheath (conductive sheath) S3.
The outer periphery thereof is covered with an insulating sheath S4, and in the illustrated example, is a coaxial cable for a high-frequency connector.
In this specification, the stranded wire S1 and the covered portion S2 are referred to as a covered electric wire W.

An inner terminal T1 is crimped to the stranded wire S1 of the covered electric wire W. The inner terminal T1 is inserted into the insertion hole T31 of the resin spacer T3, thereby being assembled with the outer terminal T2 via the spacer T3. The outer terminal T2 includes a substantially rectangular cylindrical main body T21,
A barrel T22 formed at a base end portion (an end portion opposite to a side to be connected to a terminal of the other side) of the main body portion T21, and the spacer T3 is internally provided by a lance not shown in the drawing. It has been stopped. The crimping device 10 according to the illustrated embodiment has the terminal crimping unit 1 for crimping the outer terminal T2 to the shielded wire S. As shown in FIG.
Is swaged in a state of surrounding the outer peripheral portion of the braided sheath S3 folded back to the end of the insulating sheath S4.

In order to supply the external terminal T2 to the terminal crimping unit 1, the external terminal T2 is formed on a terminal band B as shown in FIGS. The terminal band B has a connecting portion (not shown) protruding from one side of the long carrier B2 at an interval, and the outer terminal T2 is perpendicular to the longitudinal direction of the carrier B2 via the connecting portion. Are connected together along the direction of the movement.

FIG. 5 is a schematic side view of the terminal crimping unit 1. Referring to FIGS. 1 and 5, the terminal crimping unit 1 shown in FIG. 1 manually supplies the shield wire S and allows the worker to connect the inner terminal T1 to the spacer T3 in the outer terminal T2 as described later.
It is of a type that is driven while being temporarily inserted in the
A base plate 11 (see FIG. 5) is detachably fixed to a block 10a placed on a work table. On the base plate 11, a main body block 12 is erected. At a predetermined position of the main body block 12, a terminal transport unit 13 for feeding the terminal band B and an outer terminal T of the terminal band B fed by the terminal transport unit 13 are provided.
And a press unit 20 for crimping 2. The terminal transport unit 13 is, like a well-known one,
The outer terminal T2 is linked to the press unit 20 and drives the terminal band B in conjunction with the crimping operation of the press unit 20 to convey the outer terminal T2 to the press unit 20.

The press unit 20 includes an anvil 21 for receiving an external terminal T2 connected to the terminal band B (see FIG. 3), and a barrel T2 of the external terminal T2 in cooperation with the anvil 21.
A crimper 22 for caulking 2 (see FIGS. 1 and 10), a punch 23 that moves up and down integrally with the crimper 22,
A slide cutter 24 (see FIG. 3) that cuts the connecting portion of the terminal band B and the carrier B2 when driven by the punch 23. Crimper 22 and punch 2
Reference numeral 3 is connected to a press device 26 via a shank 25 so as to be moved up and down. The operation of the press device 26 is controlled by a control unit 100 described later.

In the above-described configuration, an insertion unit 50 is provided behind the terminal crimping unit 1 according to the illustrated embodiment. As shown in FIGS. 1 and 5, the insertion unit 50 is moved forward and backward by an advance / retreat drive unit 51 as an advance / retreat drive mechanism disposed behind the terminal crimping unit 1 on the block 10a. And a movable table 52 that moves forward and backward. The movable table 52 has an insertion drive unit 53 as an insertion drive mechanism.
And an engagement / disengagement drive unit 54 as an engagement / disengagement drive mechanism driven forward and backward by the insertion drive unit 53 is provided. Each drive unit 51, 53, 54
Are all embodied by air cylinders.

A locking claw 55 is attached to the engagement / disengagement drive unit 54. The locking claw 55 is connected to the engagement drive unit 54.
It extends horizontally so that it can move up and down. At the distal end of the locking claw 55, a distal locking portion 55a that is sharpened downward is formed. As will be described later, the distal locking portion 55a is inserted into the inner terminal T1 temporarily inserted into the outer terminal T2. It can be disengaged from the upper part.

Further, a terminal receiver 56 is fixed to the movable table 52, extends in parallel with the locking claw 55, and faces the locking claw 55 in a vertical direction. When the movable table 52 is driven forward by the forward / backward drive unit 51 as the above-mentioned forward / backward drive mechanism, the pressure receiving surface 5 that comes into contact with the end surface of the external terminal T2 on the anvil 21 is provided at the distal end of the terminal receiver 56.
6a and an external terminal T2 whose end face is in contact with the pressure receiving surface 56a.
And a pair of guide projections 56b for receiving the side portions of the guide.

An insertion window 12a is formed in the main body block 12 of the terminal crimping unit 1 so that the locking claw 55 and the terminal receiver 56 can move between the anvil 21 and the crimper 22. . Further, a dog 62 detected by a sensor 61 is provided on the back surface of the main body block 12.
Is provided. The sensor 62 is connected to the control unit 100. In the illustrated embodiment, the insertion unit 50 is driven only when the terminal crimping unit 1 having the insertion window 12a is mounted. An interlock capable of identifying the type of the terminal crimping unit 1 is configured in the control unit 100. Thus, the entire apparatus is configured as a general-purpose machine that can use different types of terminal crimping units.

The control unit 100 includes a microcomputer and other electrical components, and is connected to the sensor 61, and is also connected to the press device 26, the insertion unit 50, and the foot switch 101. Each unit is configured to be driven by the operation of 101 as described below. FIG.
2 is a schematic side view of the crimping device 10 showing an operation process of the insertion unit 50 of FIG. FIGS. 7 to 9 correspond to FIGS.
10 is an enlarged view of a main part showing an operation process of the insertion unit 50 of FIG. 1, and FIG. 10 is a perspective view of a crimping process by the terminal crimping unit 1 of FIG.

First, referring to FIG. 1, FIG. 5 and FIG. 6, an operator temporarily inserts shield wire S to which inner terminal T1 has been crimped in advance into outer terminal T2 conveyed onto anvil 21. When the foot switch 101 is operated at the time and the crimping operation is started, first, the control unit 100
It is confirmed that the terminal crimping unit 1 has the insertion window 12a, and when the terminal crimping unit 1 is a unit having the insertion window 12a, the moving unit of the insertion unit 50 is moved prior to the pressing step by the press device 26. 51 is driven, and the movable table 52 moves forward from the retreat position in the initial state to the work position shown in FIG. Thereby, the locking claw 55 and the terminal receiver 56 on the movable table 52 are introduced between the anvil 21 and the crimper 22 through the insertion window 12a, and as shown in FIG. The terminal receiver 56 receives the end face of the outer terminal T2 in a state facing upward.

Next, referring to FIGS. 1 and 7, the control unit 100 drives the engagement / disengagement drive unit 54 of the insertion unit 50, and drives the locking claw 55 downward.
Is displaced from the retracted position shown by the virtual line to the locked position shown by the solid line. As a result, the distal end locking portion 55a of the locking claw 55 is locked to the undulation of the inner terminal T1. Next, FIG.
Referring to FIG. 8 and FIG. 8, the distal end locking portion 55a is connected to the inner terminal T1.
After that, the control unit 100 drives the insertion drive unit 53, pulls the locking claw 55 backward, and drives the inner terminal T1 inside the outer terminal T2. As a result, FIG.
As shown in the figure, a claw T11 formed on the upper part of the inner terminal T1.
Bites into the inner peripheral portion of the spacer T3 and is locked when inserted to a preset regular insertion position.

Then, as shown in FIG. 9, after the locking claw 55 is retracted upward, the locking claw 55 and the terminal receiver 56 are retracted to the rear of the terminal crimping unit 1 by the advance / retreat drive unit 51, and the press is performed. The press operation is performed by driving the device 26 (see FIG. 10). As a result, the outer terminal T2 into which the inner terminal T1 is fully inserted is cut from the terminal band B and crimped to the end of the shield wire S, so that it is integrated with the shield wire S as shown in FIG.

As described above, in the illustrated embodiment, the locking claw 55 and the terminal receiver 56 are introduced between the anvil 21 and the crimper 22 by the advance / retreat drive unit 51 before the pressing step, and the terminal receiver 56 After the main insertion is performed with the outer terminal T2 received, a crimping step of caulking the outer terminal T2 is performed, so that the inner terminal T1 is automatically and uniformly inserted into the proper insertion position. In this state, it is assembled to the spacer of the external terminal T2, and is integrated with the external terminal T2 in a state where electrical insulation is secured. Then, since the outer terminal T2 is swaged in this state, the crimped state of the outer terminal T2 is stabilized, and the yield is improved.

Therefore, in the above embodiment, since the insertion operation can be performed automatically and reliably, a remarkable effect that the yield is increased and the workability is improved is exhibited. In particular, in the illustrated embodiment, the terminal receiver 56 stops the outer terminal T2 in a locked state, so that the insertion operation of the inner terminal T1 is ensured. In addition, the use of the interlock sensor 61 has the advantage that various types of terminal crimping units can be used in addition to the terminal crimping unit 1 that requires the insertion operation of the inner terminal T1.

The above embodiment is merely an example of a preferred specific example of the present invention, and the present invention is not limited to the above embodiment. FIG. 11 is an enlarged side view schematically showing a main part according to another embodiment of the present invention.
2 is a schematic cross-sectional view showing an enlarged main part of FIG. As shown in these figures, the distal end locking portion 55a of the locking claw 55
May have a U-shaped hook shape. In this case, after the main insertion step (movement in the direction) is completed, as shown by the-arrow indicating the operation step procedure, the locking claw 55 is temporarily moved by the insertion drive unit 53 as shown by the arrow. It is desirable that the engaging claw 55 is retracted upward by the engagement / disengagement drive unit 54 after the advancing is performed. When this operation procedure is adopted, the distal end locking portion 55a of the locking claw 55 is formed in a hook shape as shown in the figure, and the distal locking portion 5a is provided inside the opening T23 of the outer terminal T2.
Even when the inner terminal T1 is pushed in by inserting the inner terminal 5a, there is no possibility that the outer terminal T2 and the locking claw 55 will interfere with each other when the locking claw 55 is retracted.
There is an advantage that it is possible to reliably perform the inserting operation and the retreating operation even if it is designed to be pushed into the inside of the device 3.

It goes without saying that various design changes are possible within the scope of the claims of the present invention.

[0032]

As described above, according to the present invention, since the insertion operation can be performed automatically and reliably, a remarkable effect that the yield is improved and the workability is improved is exhibited.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a schematic configuration of a crimping device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a shielded wire which is an object of the crimping device of FIG.

FIG. 3 is a perspective view showing a state before crimping by the terminal crimping unit of FIG. 1;

FIG. 4 is a perspective view of a shield wire to which an outer terminal is crimped.

FIG. 5 is a schematic side view of the terminal crimping unit of FIG. 1;

FIG. 6 is a schematic side view of the crimping device illustrating an operation process of the insertion unit of FIG. 1;

FIG. 7 is an enlarged view of a main part showing operation steps of the insertion unit of FIG. 1;

FIG. 8 is an enlarged view of a main part showing operation steps of the insertion unit of FIG. 1;

FIG. 9 is an enlarged view of a main part showing operation steps of the insertion unit of FIG. 1;

FIG. 10 is a perspective view of the crimping step by the terminal crimping unit of FIG. 1 as viewed from the back side.

FIG. 11 is an enlarged side view schematically showing a main part according to another embodiment of the present invention.

FIG. 12 is a schematic cross-sectional view showing an enlarged main part of FIG. 11;

DESCRIPTION OF SYMBOLS 1 terminal crimping unit 10 crimping device 13 terminal transport unit 20 press unit 21 anvil 22 crimper 26 press device 50 terminal insertion unit 51 advance / retreat drive unit 52 movable table 53 insertion drive unit 54 engagement / disengagement drive unit 55 locking claw 55a distal end locking portion 56 terminal receiving 56a pressure receiving surface 56b guide projection 61 sensor 62 dog 100 control unit B terminal band S shielded wire S1 stranded wire S2 coating portion S3 braided sheath S4 insulating sheath T1 inner terminal T2 outer terminal T3 spacer W Insulated wire

Claims (5)

[Claims] An end of a conductive sheath covered by an insulating sheath is exposed from an end of the insulating sheath, and a core end of a covered electric wire covered by the conductive sheath. In order to crimp the outer terminal electrically connected to the end of the conductive sheath at a predetermined timing while incorporating a spacer into which the inner terminal is attached to the shield wire to which the inner terminal is crimped in advance. A press unit having an anvil and a crimper for caulking the outer terminal; and a terminal transport unit for transporting a terminal band in which the outer terminal is continuous between the anvil and the crimper. And a terminal insertion unit for fully inserting the inner terminal temporarily inserted into the outer terminal sent between the anvil and the crimper, and a press unit for the anvil and the crimper. A terminal crimping method for a shielded wire, comprising control means for controlling a press unit and a terminal insertion unit so that the terminal insertion unit performs a main insertion operation of an inner terminal prior to performing a crimping operation. apparatus. 2. A terminal crimping apparatus for a shielded wire according to claim 1, wherein a terminal crimping unit in which the press unit and the terminal transport unit are unitized is detachably provided to the press device. A terminal crimping apparatus for a shielded wire, further comprising switching means for turning on / off operation of a terminal insertion unit according to a model. 3. The shielded terminal crimping device according to claim 1, wherein the terminal insertion unit is capable of engaging with an inner terminal temporarily inserted into an outer terminal between the anvil and the crimper. An engaging / disengaging drive mechanism for driving the locking claw between a locking position for locking the inner terminal and a retracted position retracting from the inner terminal; and an inner terminal having the locking claw temporarily inserted into the outer terminal. The insertion claw is driven between the anvil and the crimper by driving the locking claw via the engagement / disengagement driving mechanism, and the locking claw via the insertion driving mechanism. A terminal crimping device for a shield wire, comprising: an advancing / retracting drive mechanism for advancing and retreating; and a terminal receiver driven by the advancing / retreating drive mechanism and receiving an outer terminal when the inner terminal is fully inserted by a locking claw. 4. The shielded terminal crimping device according to claim 3, wherein the engagement / disengagement drive mechanism drives the locking claw from the locking position to the retracted position after the insertion driving mechanism has completed the main insertion operation. A terminal crimping device for a shielded wire, which drives a locking claw in a direction opposite to an insertion direction. 5. An end of a conductive sheath covered by an insulating sheath is exposed from an end of the insulating sheath, and a core end of a covered electric wire covered by the conductive sheath. In order to crimp the outer terminal electrically connected to the end of the conductive sheath at a predetermined timing while incorporating a spacer into which the inner terminal is attached to the shield wire to which the inner terminal is crimped in advance. And crimping the outer terminal after temporarily inserting the inner terminal into the outer terminal at the press position where the outer terminal is crimped, and then inserting the temporarily inserted inner terminal into the outer terminal. A method for crimping a terminal for a shielded wire.