JP3456422B2 - Terminal crimping equipment for shielded wires - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to relates to the terminal crimping equipment for shielded wire.

[0002]

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

Generally, a shielded wire is one in which the outer circumference of a covered electric wire is covered with a conductive sheath, and the outer circumference of this conductive sheath is covered with an insulating sheath.
The inner terminal is crimped. The outer terminal for the shield wire is crimped to the shield wire while being connected to the conductive sheath, and covers the outer circumference of the inner terminal connected to the core wire of the covered electric wire . Usually, in order to crimp the outer terminal to the shielded wire, the conductive sheath is exposed at the end of the shielded wire by peeling off the insulating sheath, and this conductive sheath is peeled off from the insulating sheath. It is folded back at the end.

Here, an insulating annular spacer is provided between the outer terminal and the inner terminal, and the annular spacer is
It is fixed inside by the lance of the external terminal. On the other hand,
The inner terminal is formed with a protrusion that engages with the inner circumference of the annular spacer. Then, in the terminal connecting step of the shielded wire , the inner terminal previously crimped to the core wire of the covered electric wire of the shielded wire is inserted into the annular spacer assembled in the outer terminal, and the protrusion is engaged with the inner peripheral surface of the annular spacer. After stopping
The outer terminals are crimped.

[0005]

Conventionally, the work of inserting the inner terminal into the annular spacer incorporated in the outer terminal has conventionally been done by hand. For this reason, the projections of the inner terminals often cause improper locking, resulting in poor yield. 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.

[0006] The present invention has been made in view of the above problem, to improve the yield, and an object of the invention to provide a terminal crimping equipment for good workability shielded.

[0007]

In order to solve the above-mentioned problems, according to the present invention, an end portion of a conductive sheath covered with an insulating sheath is exposed from the end portion of the insulating sheath. A shield wire in which the inner terminal is pre-crimped to the end of the core wire of the covered electric wire covered with the conductive sheath, the spacer has a built-in spacer to which the inner terminal is assembled, and the end portion of the conductive sheath. A shield wire terminal crimping device for crimping an electrically connected outer terminal at a predetermined timing, between a press unit having an anvil and a crimper for crimping the outer terminal, and the anvil and the crimper. In the rear of the press unit and the terminal transport unit that transports the terminal strip in which the outer terminals are continuous.
Formation provided, a terminal among provisionally inserted to feed has an outer terminal between the anvil and the crimper, to the inside terminal
The claws cut into the inner peripheral part of the spacer and set in advance.
The terminal insertion unit for main insertion up to the specified regular insertion position, and the press unit and terminal so that the terminal insertion unit performs main insertion operation for inner terminals before the press unit performs crimping operation with the anvil and crimper. A shield wire terminal crimping device, comprising: a control means for controlling an insertion unit.

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

The "predetermined timing" for crimping the outer terminal may be the 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. Alternatively, the timing may be the timing when manually driving. In a preferred embodiment, a terminal crimping unit in which the above-mentioned press unit and 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 model of this terminal crimping unit. A switching means for turning on / off is further provided.

In the invention including this specific matter, the interlocking can be switched so as to drive the terminal insertion unit only when the terminal crimping unit of a specific model is mounted on the press machine, so that various kinds of operations can be performed. The terminal crimping unit can be used universally with the same press device. In another preferred aspect, the terminal insertion unit includes a locking claw capable of locking the inner terminal temporarily inserted in the outer terminal between the anvil and the crimper, and a locking position for locking the inner terminal. The engagement / disengagement drive mechanism that drives the locking claw between the retracted position that retracts from the inner terminal, and the engagement / disengagement drive mechanism that allows the locking claw to permanently insert the temporarily inserted inner terminal into the outer terminal. The insertion drive mechanism that drives the locking claw via the insertion drive mechanism, the advance / retreat drive mechanism that drives the locking claw through the insertion drive mechanism to move the locking claw back and forth between the anvil and the crimper, and the advance / retract drive mechanism. The terminal receiver is driven and receives the outer terminal when the inner terminal is fully inserted by the locking claw.

In the invention including this specific matter, the engaging / retracting drive mechanism introduces the locking claw and the terminal receiver between the anvil and the crimper before the pressing step, and the terminal receiver receives the outer terminal. Then, the engagement / disengagement drive mechanism displaces the locking claw from the retracted position to the locked position, and locks the inner terminal. After that, the insertion driving mechanism drives the locking claw via the engagement / disengagement driving mechanism, so that the locking claw cooperates with the terminal receiver to fully insert the inner terminal into the outer terminal. Here, since the outer terminal is, so to speak, locked by the outer terminal receiving the outer terminal, the inserting operation of the inner terminal is ensured.

In still another preferred embodiment, after the insertion drive mechanism finishes the main insertion operation, the engagement claw is unlocked before driving the engagement claw from the engagement position to the retracted position. It is driven in the insertion direction. In the invention including this specific matter, since the locking claw that has completed the main insertion can be driven in the direction away from the inner terminal even by the insertion drive mechanism, the locking claw is formed into a hook shape and the opening of the outer terminal is formed. Even when the inner terminal is pushed further inward, the locking claw can be reliably retracted from the outer terminal after the main insertion.

[0013]

[0014]

DETAILED DESCRIPTION OF THE INVENTION Referring to the accompanying drawings,
A preferred embodiment of the present invention will be described in detail. Figure 1
Is a perspective view showing a schematic configuration of a pressure bonding apparatus 10 in the embodiment of Hahon invention, crimping apparatus 10 of FIG. 2 FIG. 1
FIG. 3 is an exploded perspective view of a shield wire as a target of FIG. 3, FIG. 3 is a perspective view showing a state before crimping by the terminal crimping unit 1 of FIG. 1, and FIG. 4 is a perspective view of a shield wire to which an outer terminal is crimped.

First, referring to FIGS. 2 and 3, the shielded wire S which is the object of the present invention is a stranded wire S having conductivity.
1 is coated with an insulating coating S2, and the outer peripheral surface of the coating S2 is further coated with a braided sheath (conductive sheath) S3,
The outer periphery of the coaxial cable is covered with an insulating sheath S4, and in the illustrated example, the coaxial cable is for a high frequency connector.
In addition, in this specification, the stranded wire S1 and the covering 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. By inserting the inner terminal T1 into the insertion hole T31 of the resin spacer T3, the inner terminal T1 is assembled with the outer terminal T2 via the spacer T3. The outer terminal T2 includes a body T21 having a substantially rectangular tube shape,
And a barrel T22 formed at the base end portion (the end portion on the side opposite to the side connected to the other terminal) of the main body portion T21, and the spacer T3 is internally provided by a lance not shown in the drawing. It is a fixed one. 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, and as shown in FIG.
However, the braided sheath S3 folded back to the end of the insulating sheath S4 is crimped while surrounding the outer peripheral portion.

In order to supply the outer terminal T2 to the terminal crimping unit 1, the outer terminal T2 is formed on the terminal strip B as shown in FIGS. The terminal strip B has a connecting portion (not shown) protruding from one side portion of the long carrier B2 with a space therebetween, and the outer terminal T2 is orthogonal to the longitudinal direction of the carrier B2 via the connecting portion. It is connected integrally along the direction.

FIG. 5 is a schematic side view of the terminal crimping unit 1. With reference to FIGS. 1 and 5, the terminal crimping unit 1 shown in FIG. 1 supplies the shield wire S manually, and the operator connects the inner terminal T1 to the spacer T3 in the outer terminal T2 as described later.
It is a type that is driven in the state that it is temporarily inserted in
It is provided with a base plate 11 (see FIG. 5) which is detachably fixed to a block 10a placed on a workbench. A main body block 12 is erected on the base plate 11. At a predetermined position of the main body block 12, a terminal transport unit 13 that feeds the terminal strip B, and an outer terminal T of the terminal strip B that is fed by the terminal transport unit 13.
And a press unit 20 for crimping the two. The terminal transport unit 13 is similar to the known one,
It is linked to the press unit 20 and drives the terminal strip B in conjunction with the crimping operation of the press unit 20 to convey the outer terminals T2 to the press unit 20.

The press unit 20 has an anvil 21 (see FIG. 3) that receives the outer terminal T2 connected to the terminal strip B, and the barrel T2 of the outer terminal T2 in cooperation with the anvil 21.
A crimper 22 that crimps the 2 (see FIGS. 1 and 10), and a punch 23 that moves up and down integrally with the crimper 22,
It has a connecting portion of the terminal strip B and a slide cutter 24 (see FIG. 3) that cuts the carrier B2 by being driven by the punch 23. Crimper 22 and punch 2
3 is connected to a press device 26 via a shank 25 and can be moved up and down. The operation of the press device 26 is controlled by the control unit 100 described later.

In the structure as described above, the 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 includes an advancing / retreating drive section 51 as an advancing / retreating drive mechanism disposed on the block 10a behind the terminal crimping unit 1 and a forward / backward drive section 51. It has a movable table 52 that moves forward and backward. The movable table 52 has an insertion drive unit 53 as an insertion drive mechanism.
Is attached, and an engagement / disengagement drive unit 54 as an engagement / disengagement drive mechanism that is driven back and forth by the insertion drive unit 53 is provided. Each drive unit 51, 53, 54
Are both embodied as air cylinders.

A locking claw 55 is attached to the engagement / disengagement drive section 54. The locking claw 55 is the engagement / disengagement drive unit 54.
It is extended horizontally by the vertical movement. A tip locking portion 55a that is pointed downward is formed at the tip of the locking claw 55, and as will be described later, this tip locking portion 55a is temporarily inserted into the outer terminal T2 and the inner terminal T1 is inserted. The upper part of the can be disengaged.

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 the vertical direction. The pressure receiving surface 5 that contacts the end surface of the outer terminal T2 on the anvil 21 when the movable table 52 is driven forward by the forward / backward drive unit 51 as the forward / backward drive mechanism is provided at the tip of the terminal receiver 56.
6a and the outer terminal T2 whose end surface is in contact with the pressure receiving surface 56a.
And a pair of guide protrusions 56b for receiving the side portions of the.

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 back and forth between the anvil 21 and the crimper 22. . Further, a dog 62 detected by the 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, and 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. As a result, 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, is connected to the sensor 61, is connected to the press device 26, the insertion unit 50, and the foot switch 101, and is connected to the foot switch. By operating 101, each unit is configured to be driven as described below. Figure 6
FIG. 3 is a schematic side view of the crimping device 10 showing an operation process of the insertion unit 50 of FIG. 1. 7 to 9 are similar to FIG.
FIG. 10 is an enlarged view of a main part showing the operation process of the insertion unit 50 of FIG. 10, and FIG. 10 is a perspective view of the crimping process by the terminal crimping unit 1 of FIG.

First, referring to FIGS. 1 and 5 and 6, an operator temporarily inserts the shield wire S to which the inner terminal T1 is crimped in advance into the outer terminal T2 conveyed onto the anvil 21. At this point, when the foot switch 101 is operated to start the crimping operation, first, the control unit 100
It is confirmed that the terminal crimping unit 1 has the insertion window 12a. If the terminal crimping unit 1 is the unit having the insertion window 12a, the advance / retreat drive unit of the insertion unit 50 is preceded by the pressing process by the pressing device 26. 51 is driven, and the movable table 52 advances from the retracted position in the initial state to the working position shown in FIG. Thus, Oh <br/> Rukakaritometsume 55 and the terminal receiving 56 on the movable table 52 through the insertion window 12a is introduced between the anvil 21 and the crimper 22, as shown in FIG. 6, the locking The terminal receiver 56 receives the end surface of the outer terminal T2 with the claw 55 facing above the inner terminal T1.

Next, referring to FIGS. 1 and 7, the control unit 100 drives the engagement / disengagement drive portion 54 of the insertion unit 50 to drive the locking claws 55 downward, so that the control unit 100 of FIG.
The locking claw 55 is displaced from the retracted position shown by the phantom line to the locking position shown by the solid line. As a result, the front end locking portion 55a of the locking claw 55 is locked to the ups and downs of the inner terminal T1. Next, FIG.
Referring to FIG. 8 and FIG. 8, the front end locking portion 55a has the inner terminal T1.
Then, the control unit 100 drives the insertion drive portion 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 FIG. 3, the claw T11 formed on the upper portion of the inner terminal T1
Engages in the inner peripheral portion of the spacer T3 and is locked when the spacer T3 is inserted up to a preset regular insertion position.

After that, as shown in FIG. 9, the locking claw 55 is retracted upward, and then the forward / backward drive unit 51 retracts the locking claw 55 and the terminal receiver 56 to the rear of the terminal crimping unit 1 and presses. The device 26 is driven to perform the pressing operation (see FIG. 10). As a result, the outer terminal T2 into which the inner terminal T1 is fully inserted is cut from the terminal strip B and crimped to the end of the shield wire S, and is integrated with the shield wire S as shown in FIG.

As described above, in the illustrated embodiment, the forward / backward drive portion 51 introduces the locking claw 55 and the terminal receiver 56 between the anvil 21 and the crimper 22 before the pressing step, and the terminal receiver 56 is inserted. After the main insertion is performed while receiving the outer terminal T2, the crimping step of crimping the outer terminal T2 is performed, so that the inner terminal T1 is automatically and uniformly inserted into the regular insertion position. In this state, it is assembled to the spacer of the outer terminal T2 and integrated with the outer terminal T2 in a state where electrical insulation is secured. Since the outer terminal T2 is crimped in this state, the crimped state of the outer terminal T2 is stabilized and the yield is improved.

Therefore, in the above-described embodiment, since the insertion operation can be automatically and reliably performed, the yield is increased and the workability is improved. Particularly, in the illustrated embodiment, the terminal receiver 56 fixes the outer terminal T2 in a locked state, so that the inserting operation of the inner terminal T1 is ensured. Further, by using the interlock type sensor 61, there is an advantage that various terminal crimping units can be used in general, in addition to the terminal crimping unit 1 which requires the inserting operation of the inner terminal T1.

The above-described embodiments are merely examples of preferred examples of the present invention, and the present invention is not limited to the above-described embodiments. FIG. 11 is a schematic side view showing an enlarged main part of 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 front end locking portion 55a of the locking claw 55
May have a U-shaped hook shape. Further, in that case, after the main insertion step (movement in the direction of) is completed as indicated by the arrow-indicating the operation step procedure, as shown by, the engaging pawl 55 is temporarily moved by the insertion drive unit 53. It is desirable to retract the locking claw 55 upward by the engagement / disengagement drive unit 54 after advancing. When this operation procedure is adopted, the tip locking portion 55a of the locking claw 55 is formed into a hook shape as shown in the figure, and the tip locking portion 5 is provided inside the opening T23 of the outer terminal T2.
Even when the inner terminal T1 is pushed in by inserting 5a, there is no possibility that the outer terminal T2 and the locking claw 55 interfere with each other when the locking claw 55 is retracted.
There is an advantage that the insertion operation and the withdrawal operation can be surely performed even if the specification is to be pushed inward.

Needless to say, various design changes can be made 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 automatically and reliably performed, the yield is increased and the workability is improved.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view of a shield wire which is a target of the crimping device of FIG.

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

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

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 showing the operation process of the insertion unit of FIG. 1. FIG.

FIG. 7 is an enlarged view of a main part showing an operation process of the insertion unit in FIG.

8 is an enlarged view of a main part showing an operation process of the insertion unit in FIG.

FIG. 9 is an enlarged view of a main part showing an operation process of the insertion unit in FIG.

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

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

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

[Explanation of symbols]

1-terminal crimping unit 10 Crimping device 13-terminal transport unit 20 Press Unit 21 anvil 22 crimper 26 Press machine 50 terminal insertion unit 51 Forward / backward drive unit 52 movable table 53 Insertion drive unit 54 Engagement drive unit 55 Locking claw 55a Tip locking part 56 terminals 56a Pressure receiving surface 56b Guide projection 61 sensor 62 dog 100 control unit B terminal strip S shield wire S1 stranded wire S2 coating S3 braided sheath S4 insulating sheath T1 internal terminal T2 external terminal T3 spacer W coated electric wire

Claims (4)

(57) [Claims] 1. A core wire end portion of a covered electric wire, wherein an end portion of a conductive sheath covered with the insulating sheath is exposed from the end portion of the insulating sheath and covered with the conductive sheath. In order to crimp the outer terminal, which is electrically connected to the end of the conductive sheath, at a predetermined timing, it has a built-in spacer for assembling the inner terminal to the shield wire in which the inner terminal is crimped in advance. A terminal crimping device for shielded wire, comprising: a press unit having an anvil and a crimper for crimping the outer terminal; and a terminal carrying unit for carrying a terminal strip in which the outer terminal is continuous between the anvil and the crimper. When provided behind the press unit, fed by a temporary inserted among terminals to external terminals, the pawl formed on the inner terminal is the scan between the anvil and the crimper The inner peripheral portion of the over support
The terminal insertion unit that digs into the main body and inserts it to the preset regular insertion position, and the terminal insertion unit performs the main insertion operation of the inner terminal before the press unit performs the crimping operation with the anvil and crimper. 1. A shield wire terminal crimping device, comprising: a control unit for controlling the press unit and the terminal insertion unit. 2. The terminal crimping device for a shielded wire according to claim 1, wherein the terminal crimping unit in which the pressing unit and the terminal conveying unit are unitized is detachably provided to the pressing device. A terminal crimping device for shielded wire that is further equipped with switching means for turning ON / OFF the operation of the terminal insertion unit according to the model. 3. The shield wire terminal crimping device according to claim 1, wherein the terminal insertion unit is a locking claw capable of locking an inner terminal that is temporarily inserted into an outer terminal between an anvil and a crimper. And an engagement / disengagement drive mechanism that drives the locking claw between a locking position that locks the inner terminal and a retracted position that retracts from the inner terminal, and an inner terminal in which the locking claw is temporarily inserted into the outer terminal. The insertion pawl is driven between the anvil and the crimper by driving the locking pawl through the insertion drive mechanism and the insertion drive mechanism that drives the pawl through the engagement / disengagement drive mechanism so that the main insertion is performed. A terminal crimping device for shielded wire, comprising: an advance / retreat drive mechanism for advancing / retreating; and a terminal receiver that is driven by the advancing / retreating drive mechanism and receives an outer terminal when the inner terminal is fully inserted by a locking claw. 4. The shield wire terminal crimping device according to claim 3, wherein the engagement / disengagement driving mechanism drives the locking claw from the locking position to the retracted position after the insertion driving mechanism completes the main insertion operation. A shield wire terminal crimping device that drives the locking claws in the opposite insertion direction in advance.