JP3060794B2 - Terminal crimping 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 terminal crimping apparatus for crimping a wire by caulking a barrel of a terminal fitting.

[0002]

2. Description of the Related Art As shown in FIG. 8 (B), a terminal metal fitting is formed by bending a thin plate made of a conductive material and fitting with a mating terminal metal fitting on one side. And a barrel portion B for crimping the tip of the electric wire W is provided on the other side. The barrel portion B is composed of a coating barrel C for crimping a coating m at the end of the electric wire W and a core barrel D for crimping a core n on which a plurality of fine wires p that are stripped off and exposed are bundled. It is crimped so as to wrap around. At both ends of the core barrel D, a projection called a bell mouth E is provided so that the core n is not cut at the angular edge of the core barrel D.

As shown in FIG. 8 (A), this terminal fitting has a contact portion A and a fitting portion b having a substantially U-shaped cross-section at its rear portion. .) S is formed by performing pressure bonding.
A covering barrel piece c and a core barrel piece d that are crimped to the covering barrel C and the core barrel D are erected at the fitting part b of the work S, and the electric wire W is inserted into the fitting part b by the terminal crimping device. And the two barrel pieces c,
It has been conventionally performed to bend each inward and press-bond.

As this terminal crimping device, for example, the invention described in Japanese Utility Model Laid-Open Publication No. 1-172291 is known. As shown in FIGS. 9 and 10, a workpiece S is placed on a molding surface of a lower die 71. After the electric wire W is set above this, the covering crimper 73 and the core wire crimper 74 attached to the ram 72 are lowered and crimping of the covering barrel piece c and the core wire barrel piece d is performed.

At this time, an electric wire holder 75 is provided between the covering crimper 73 and the core wire crimper 74 so that the electric wire W is pressed into the U-shaped fitting portion b and then crimped. The wire retainer 75 is made of a block-shaped plate, and has spring receiving pins 76 and 7 provided on the upper portion and the ram 72.
7, a tension spring 78 is suspended and attached downwardly biased. Further, the wire holding member 75 is provided on the lower surface with a depressed surface 79 for bringing the electric wire W to the center, and when the ram 72 moves down, the electric wire W is first moved to the center by the depressed surface 79 and then into the work S. The crimper 73 and the crimper 73 press the fitting portion b.

[0006]

SUMMARY OF THE INVENTION Here, Bellmouth E
As shown in FIG. 11, a range r whose both sides are narrower by x than the lateral width q of the core wire barrel piece d is pressed by the molding surface of the core wire crimper 74 as shown in FIG. Corresponds to a position where a part of the lower end of the wire retainer 75 provided inside is located inside the edge of the core wire barrel piece d. Therefore, as shown by the two-dot chain line in FIG. 11, the wire retainer 75 could only be lowered until it hit the core barrel piece d.

That is, as shown in FIG. 12A, the core wire n is pushed in by the wire retainer 75 , and
As shown in (B), the wire retainer 75 is a core barrel piece d.
, The wire W can no longer be pushed in, and the core wire barrel piece d is crimped while the wire W is kept floating above the bottom surface of the fitting portion b. For this reason, as shown in FIG. 12C, a part of the core wire n protruding from the butted portion of the core wire barrel pieces, that is, so-called core wire spilling may occur.

When the electric wire W is arranged at a position deviated from the center of the fitting portion b, the core 79 may be led out of the fitting portion b. It is provided to guide to the center of the to prevent this. However, when the inclined surface 79 is provided, even if the wire retainer 75 is lowered to a position where it comes into contact with the core wire piece d, the wire W can be pushed only to a further upper position.
On the contrary, the tendency of the core wire to spill was promoted.

For this reason, the present invention is to provide a terminal crimping apparatus that does not cause spillage of the core wire by completely fitting the core wire into the insertion portion.

[0010]

As means for achieving the above object, the invention of claim 1 is characterized in that a coating barrel piece and a core wire barrel piece are erected at the upper edge between a lower mold and an upper mold. A workpiece having an inserted portion having a substantially U-shaped cross section and a tip of an electric wire are set above the inserted portion, and the sheath of the electric wire and the core wire are wrapped by the coated barrel piece and the core barrel piece, respectively. In the terminal crimping device for tightening and crimping, the upper die is provided with a molding surface for pressing the coating barrel piece, and has a molding crimper having a molding width wider than the coating barrel piece, and a molding for pressing the core wire barrel piece. A core wire crimper having a surface, and having a molding width capable of pressing only the center portion in the width direction to provide bell mouths at both ends in the width direction of the core wire barrel piece, and disposed between the two crimpers. , Coated barrel pieces and core barrel Prior to being crimped, a wire retainer for pushing the core of the wire into the fitting portion is provided, and between the wire retainer and the lower part of the core wire crimper, the wire retainer is released from contact with the core barrel piece. A gap is provided for this purpose, and the gap is
The wire retainer is paired with the core wire crimper at the lower part.
It has a feature in that it is formed by forming a stepped shape with a thin facing surface . The invention of claim 2 provides a lower mold and an upper mold
Between the coating barrel piece and the core barrel piece at the upper edge.
And a work in which a fitted portion having a substantially U-shaped cross section is formed.
Set the tip of the wire above the fitting,
Wrap the core wire with the coated barrel piece and core wire piece respectively
In a terminal crimping device that crimps by crimping
The upper mold has a molding surface for pressing the coated barrel piece.
Coating with a wider forming width than the coating barrel piece
Lymph and a molding surface for pressing the core barrel piece are provided,
And bell mouths are provided at both ends in the width direction of the core barrel piece
It has a molding width that can press only the center part in the width direction as much as possible
A core crimper and a crimper
Before the cover and core barrel pieces are crimped,
A wire retainer is provided to push the core of the wire into the fitting.
The wire clamp and the lower part of the core wire crimper.
During the installation, the wire retainer comes in contact with the core barrel piece.
A gap is provided to escape from the
The core wire crimper is provided with
It is formed by making the opposing surface a thick step
Characterized in Irutoko filtration. The invention according to claim 3 is characterized in that
Coated barrel piece and core wire barrel piece stand on top edge between upper mold
A work in which the provided substantially U-shaped cross-section is formed;
Set the tip of the wire above this fitting, and cover the wire.
The sheath and core wire are covered by the coated barrel piece and core wire piece, respectively.
Terminal crimping device that crimps by crimping so as to enclose it
The upper die has a molding surface for pressing the coated barrel piece.
With a wider forming width than the coated barrel piece.
A crimper and a molding surface to press the core barrel piece are provided.
The bell mouth at both ends in the width direction of the core wire barrel piece.
It has a molding width that can press only the center in the width direction to provide
Between the core crimper and the two crimpers
Before the coated barrel piece and core wire barrel piece are crimped
Wire press to push the core of the wire into the fitting
Are provided below the wire retainer and the core wire crimper.
Between the core wire barrel pieces
A gap is provided to escape from contact, and during this time
The gap is between the wire clamp and the top of the core wire crimper.
It is characterized by being formed by interposing a spacer
Having.

[0011]

First, a work in which a fitting portion having a substantially U-shaped cross section is formed is placed on a lower mold. The covering of the electric wire and the core wire are set at an upper position corresponding to the covering barrel piece and the core barrel piece which are erected on the upper edge of the fitting portion. Then, as the upper die descends, the wire retainer disposed between the covering crimper and the core wire crimper comes into contact with the wire and pushes the wire downward to put the wire into the fitting portion of the work. At this time,
Lymph is provided with bell mouths at both ends in the width direction of the core barrel.
Press only the center part to remove it.
With the core barrel piece protruding from both ends of the lymph
You. However, the space between the wire clamp and the core crimper is
A gap is provided, and the wire retainer starts from the core barrel piece.
Since the wire is released to the distant side, the wire clamp
Lowering further without contacting the rel piece, the core of the wire
To the deep part of the fitting part. Subsequently, the covering crimper and the core wire crimper are crimped and crimped so that the covering of the electric wire and the core wire are wrapped by the covering barrel piece and the core wire barrel piece, respectively. At this time, since the electric wire is pressed to the deep portion of the fitting portion, a so-called core wire spillage in which a part of the core wire protrudes from the core barrel does not occur.

[0012]

According to the present invention, when the electric wire is pushed into the fitting portion by the electric wire holding member, the electric wire can be pushed in without being disturbed by the core wire barrel piece, so that the core wire is pushed to a deep portion to reliably prevent the core wire from spilling. To play.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 of the present invention will be described below with reference to FIGS. FIG. 1 shows a main part of the terminal crimping device of the first embodiment, and an upper die fixed to a ram 2 is disposed above a lower die 1 so as to be able to move up and down like a general terminal crimping device. . The upper die comprises a coated crimper 3 for pressing the coated barrel piece c and a core wire crimper 4 for pressing the core barrel piece d.
An electric wire retainer 5 is mounted between the ram 2 and the ram 2 so as to be vertically movable by a tension spring (not shown) suspended between the electric wire retainer 5 and the ram 2.
Then, the workpiece S transported by the transport device (not shown) is placed on the lower die 1, and the electric wires W are sequentially transported from the wire transport device (not shown) to the upper surface of the lower die 1. The workpiece S is crimped so as to descend and wrap the electric wire W by the covering crimper 3 and the core wire crimper 4.

The coated crimper 3 has a thickness (forming width) wider than the coated barrel piece c so as to be formed over the entire width of the coated barrel piece c, and is formed by bending the coated barrel piece c inward at the lower end surface. Forming surface 10 is formed.

The core wire crimper 4 is a core wire barrel piece d.
Formed with a plate thickness (forming width) that is crimped in a slightly narrower range than its lateral width so that bell mouths E are provided at both ends of the molding surface, and a core surface barrel piece d is formed on the lower end surface of the molding surface 13 by curving inward. Are formed.

As shown in FIG. 2, the wire retainer 5 is formed of a substantially rectangular thick plate material as in the conventional example, and is provided with a pressing surface 14 for pressing the electric wire W. And
A tension spring (not shown) suspended between the wire retainer 5 and the ram 2 at the upper part of the wire retainer 5 is mounted to be vertically movable. The lower surface of the core crimper 4 side is made thin by a step 15 as shown in FIG.
The wire retainer 5 and the core wire crimper 4 are arranged in a laminated manner,
A gap y is formed below the core wire crimper 4 and the wire retainer 5, so that the wire retainer 5 is disposed at a position where it does not come into contact with the core barrel piece d.

The operation of the first embodiment will be described.
With the ram 2 raised, the workpiece S is transported and placed on the lower die 1 by a transport device (not shown). Further, the tip of the coating m is peeled off from the electric wire transport device (not shown) to remove the core wire n
There exposed wire W is conveyed and disposed between the workpiece S and both crimper 3,4. From this molding preparation state, ram 2
Is lowered, and pressure bonding of the work S is started.

Then, the ram 2 descends, and the pressing surface 14 of the wire retainer 5 further descends while pressing the wire W as shown in FIG. At this time, the wire holder 5 enters between the sheath barrel piece c and the core barrel piece d, and the core barrel piece d.
Therefore, the wire W is further lowered to push the wire W to the deep portion of the fitting portion b. At about the same time, the molding surfaces 10, 13 of the covering crimper 3 and the core wire crimper 4 abut against the upper ends of the covering barrel piece c and the core barrel piece d (only the molding surface 13 is shown in FIG. 3), The barrel pieces c and d are curved along the molding surfaces 10 and 13, and FIG.
As shown in (1), the core wire n and the sheath m of the electric wire W are crimped so as to wrap them, and the sheath m and the core wire n are crimped to the respective sheath barrels C and D. For this reason, both barrel pieces c and d are crimped in a state where the core wire n is pressed against the bottom of the fitting portion b, and the crimping process is completed without the core wire spilling. Then, when the pressure bonding step is completed, the ram 2 is raised again, and the pressure bonding step for the next work is started.

FIG. 4 is a front view of a main part of the second embodiment. The core wire crimper 4a is formed of a thick plate material, and the upper surface of the wire holding member 5a is thickened by a step 21 on the side thereof. When the covering crimper 3, the wire retainer 5 a and the core wire crimper 4 a are arranged in a stack, the core wire crimper 4
A gap is formed between a and the lower part of the wire retainer 5a, so that the wire retainer 5a is disposed so as not to contact the core barrel piece d.

FIG. 5 is a front view of a main part of the third embodiment. The core wire crimper 4b and the wire retainer 5b are each formed of a plate material, and a spacer 2 is provided between the two.
3 are provided, and the core wire crimper 4 is
A gap is formed between b and the lower part of the wire retainer 5b, so that the wire retainer 5b is disposed so as not to contact the core barrel piece d.

In the wire holding members according to the first to third embodiments, an example is shown in which no pressing surface is provided on the pressing surface. However, as shown in FIGS. May be provided with approach surfaces 34 and 35 for bringing the electric wire W to the center of the fitting portion b. Thereby, since the electric wire W is arranged at the center in the fitting portion b having a U-shaped cross section and then formed by crimping, the occurrence of core wire spillage can be further reliably prevented.

The present invention is not limited to the embodiment described above.
The wire W may be inserted between the wire and the core barrel piece d, and the electric wire W may be pushed to the deep portion of the insertion portion, and various modifications can be made without departing from the scope of the invention.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a first embodiment.

FIG. 2 is a perspective view of an electric wire retainer according to the first embodiment.

FIG. 3 is an explanatory diagram of a crimping operation according to the first embodiment.

FIG. 4 is a front view of a main part of a second embodiment.

FIG. 5 is a front view of a main part of a third embodiment.

FIG. 6 is a sectional view of a main part showing another modification.

FIG. 7 is a sectional view of a main part showing another modification.

8A is a perspective view of a terminal fitting (work) before crimping, and FIG. 8B is a perspective view of the terminal fitting after crimping.

FIG. 9 is an exploded perspective view of an upper die showing a conventional example.

FIG. 10 is a front view of a main part showing a conventional example.

FIG. 11 is an explanatory view of the same.

FIG. 12 is an explanatory diagram showing a problem to be solved in a conventional example.

[Explanation of symbols]

W ... electric wire m ... coating n ... core wire S ... work b ... fitting part c ... coating barrel piece d ... core wire barrel piece 3 ... coating crimper 4 ... core wire crimper 5 ... wire holding 10 ... forming surface 13 ... forming surface 14 ... pressing surface

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H01R 4/18 H01R 43/00 H01R 43/048

Claims (3)

(57) [Claims] 1. A work in which a fitting portion having a substantially U-shaped cross section having a coating barrel piece and a core wire barrel piece erected at an upper edge is formed between a lower mold and an upper mold, and a work piece above the fitting part. In the terminal crimping apparatus, the tip of the electric wire is set, and the sheath of the electric wire and the core wire are crimped so as to be wrapped by the coated barrel piece and the core wire piece, respectively. A surface is provided, and a coated crimper having a molding width wider than the coated barrel piece, and a molded surface for pressing the core barrel piece are provided,
And a core wire crimper having a molding width capable of pressing only the center portion in the width direction to provide bell mouths at both end portions in the width direction of the core wire barrel piece, disposed between the two crimpers, a coated barrel piece and Prior to the core barrel piece being crimped, there is provided an electric wire retainer for pushing the core wire of the electric wire into the fitting portion. Between the electric wire retainer and the lower part of the core wire crimper, the electric wire retainer comes into contact with the core wire barrel piece. gap to escape is provided since, and the gap, the wire-pressing previous in that the lower
It is shaped like a step with a thin wall facing the core wire crimper
Terminal crimping device characterized by being formed by the above. 2. A coating barrel at an upper edge between a lower mold and an upper mold.
The U-shaped cross section in which the piece and the core barrel piece are erected
Insert the tip of the wire above the formed work
Set the wire sheath and core wire on each of the coated barrel pieces.
And crimped so that it is wrapped by the core barrel piece
In the terminal crimping apparatus, the upper die is provided with a molding surface for pressing the coated barrel piece.
Coating with a wider forming width than the coating barrel piece
Lymph and a molding surface for pressing the core barrel piece are provided,
And bell mouths are provided at both ends in the width direction of the core barrel piece
It has a molding width that can press only the center part in the width direction as much as possible
A core crimper and a crimper
Before the cover and core barrel pieces are crimped,
A wire retainer is provided to push the core of the wire into the fitting.
Between the wire retainer and the lower part of the core wire crimper.
Is because the wire retainer comes in contact with the core barrel piece.
A gap is provided for escape, and the gap is formed by the core crimper at its upper part.
The surface facing the wire retainer has a stepped shape with a thick wall
Terminal crimping device characterized by being formed by the above. 3. A coating barrel at an upper edge between a lower mold and an upper mold.
The U-shaped cross section in which the piece and the core barrel piece are erected
Insert the tip of the wire above the formed work
Set the wire sheath and core wire on each of the coated barrel pieces.
And crimped so that it is wrapped by the core barrel piece
In the terminal crimping apparatus, the upper die is provided with a molding surface for pressing the coated barrel piece.
Coating with a wider forming width than the coating barrel piece
Lymph and a molding surface for pressing the core barrel piece are provided,
And bell mouths are provided at both ends in the width direction of the core barrel piece
It has a molding width that can press only the center part in the width direction as much as possible
A core crimper and a crimper
Before the cover and core barrel pieces are crimped,
A wire retainer is provided to push the core of the wire into the fitting.
Between the wire retainer and the lower part of the core wire crimper.
Is because the wire retainer comes in contact with the core barrel piece.
A gap is provided for escape, and the gap is formed between the wire retainer and the core wire crimper.
It is formed by interposing a spacer between the upper parts.
And a terminal crimping device.