JPH0619186Y2 - Terminal crimping tool - Google Patents

Description

[Detailed Description of the Invention] <Industrial application> The present invention is a terminal used for connecting and connecting by crimping a terminal by pressurizing and deforming a bare end from which the coating of the end of a covered electric wire is peeled off. The present invention relates to a crimping tool, and more particularly to a terminal crimping tool suitable for crimping and connecting a terminal having a flat head shape and a wire connection portion having a cylindrical shape.

<Prior Art> Conventionally, many types of this type of terminal crimping tool have been devised and applied for, and many types have been manufactured and used.

This type of crimping tool basically has a male and female pressurizing body at its tip end for pressing and deforming the wire connection part of the terminal to crimp it to the bare end of the covered wire, and at the other end side. The pressurizing body is configured to be opened / closed by operating an operating lever formed in series.

<Problems to be solved by the invention> However, in such a manual type terminal crimping tool,
There is no one that regulates its posture with respect to the wire connecting portion of the terminal, that is, the posture in the depth direction and the circumferential direction, and at the same time, the bare end portion of the wire is protruded from the terminal crimping portion by a certain length to crimp and join.

Therefore, the posture of supplying the terminal to the terminal pressing body is free,
The postures of the terminal in the depth direction and the circumferential direction at the time of the pressurizing operation had to be appropriately performed only by visual measurement.

Therefore, the crimping deformation shape of the wire connection part of the terminal crimped by this type of terminal crimping tool will be different depending on the crimping operator and at the time of crimping operation. The problem was that I couldn't get one. In addition, since the bare end of the wire cannot always be projected and held from the tip of the crimped terminal, the bonding force of the wire cannot be kept constant. With the aim of solving the problems of the past, whether you are a person who can not use a terminal crimping tool, a person who is new to the terminal crimping tool, or a quick and relatively violent treatment, you always have the right posture. It is an object of the present invention to obtain a terminal crimping tool capable of crimping and deforming a wire connecting portion of a terminal and capable of always protruding a bare end of an electric wire from a crimped terminal tip.

<Means for Solving the Problems> The structure of the present invention for achieving the object will be described with reference to FIGS. 1 to 7 corresponding to the embodiments. It has a pair of male and female pressers (1), (2) at one end for pressurizing and deforming the wire connecting part (t) of the terminal (T) connected to the bare end (k) of the electric wire (K), A terminal crimping tool having a pair of operating levers (4), (5) on the other end side for opening and closing the pressurizing bodies (1), (2) via a pivot pin (3), the L-shaped A terminal holder (6) in which a gap (6c) for inserting and holding the head (h) of the terminal (T) is formed by the upper piece (18) of the metal fitting (13) and the holding plate (16).
The gap (6c) portion is located on one side of the male and female crimp portions (1a) and (2a) which are fitted to each other in the pressure bodies (1) and (2). A terminal crimping tool, which is mounted on the side of a pressure body (1 or 2), wherein the terminal holding body is
(6) is perpendicular to the side surface of the pressing body (2) by the screw (14),
It is attached so that it can move slightly in both horizontal directions, and it is elastically pressed toward the side surface of the pressing body (2) by a helical spring (15) mounted around the screw (14). A groove-shaped recess (6) that allows a certain amount of the bare end (k) of the wire (K) to project into the edge of the holding plate (16) facing the pressure body (2).
a) is formed, and the gap (6c) has a top and bottom where a plate-like elastic material (24) can be mounted in the gap leaving at least the thickness width of the terminal (T) to be inserted therein. The structure is formed to have a width. <Operation> Since the terminal crimping tool referred to in the present invention has such a structure, it is used to connect the terminal to the bare end (k) of the wire (K).
To connect (T), first insert the head (h) of the terminal (T) into the gap (6c) of the terminal holder (6) from the tip side, and then,
Insert the bare end (k) of the electric wire (K) into the tube portion of the electric wire connecting portion (t) covered with the plastic insulation tube (p) of the terminal (T), and operate the operation lever (4 ), (5) should be clamped and clamped.

At the time of this crimping operation, the terminal (T) inserted into the gap (6c) of the terminal holder (6) is inserted into this gap (6c) so that the posture in the circumferential direction and the posture in the depth direction are changed. Since the posture is always fixed, the crimping deformation of the terminal with respect to the electric wire is always performed in a constant state.

During crimping, the pressure applied to the wire connection part (t) is applied to the connection part between the wire connection part (t) and the head part (h), but at this time, the gap (6c)
However, the elastic material (24) is not mounted because the plate-shaped elastic material (24) is formed in the vertical width so that the thickness of the terminal (T) inserted into the terminal can be left in the gap. Even if
The terminal (T) moves downward in the slightly wider gap (6c), and the lower surface of the terminal (T) comes into close contact with the inner surface of the gap (6c) of the upper piece (18) to be absorbed. Since no force is applied to (T), it does not bend. This action can be expected to have a more effective cushioning effect when the elastic material (24) is mounted in the gap.

<Embodiment> An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

The structure of the main body of the terminal crimping tool is, as shown in the overall view in Figs. 1 and 2, the bare end (k) of the covered electric wire (K).
The pair of male and female pressure bodies (1) and (2) that deforms the wire connection part (t) of the terminal (T) connected to the above from the plastic insulation tube (p) by pressure is applied to the tip side (right side in the figure). And a pair of operation levers (4), (5) for opening and closing the pivot pin (3) as a fulcrum at the other end, and opening and closing the operation levers (4), (5). The pressurizing bodies (1), (2) are opened and closed by means of the pivot pin (3) serving as the fulcrum, and the terminal crimping tool itself thus constructed is generally known. There is.

The structure of the pressurizing bodies (1) and (2) in the embodiment is, as shown in an enlarged view in FIG. 3, three types of large, medium and small recesses (1a) and (1a) having different widths. ′) ...
(1) and male pressurizing body having three types of large, medium and small protrusions (2a), (2a ') ...
(2), and these pressurizing bodies (1), (2) are terminals (T) having a cylindrical electric wire connecting portion (t) covered with the plastic insulating tube (p) shown in FIG. It deforms under pressure and insulates the tubular electric wire connection part (t) of the terminal (T) from the insulation tube (p).
Of the plate body portion (1f), (2f) to be deformed by pressure from the outside of the plate and the plate body portion (11), (12) to deform the cover end portion (c) under pressure, the plate body portion (1f), (2f) is connected to the operation levers (4), (5) that are opened and closed by the pivot pin (3), and the plate bodies (11), (12)
And are fastened with screws (7) and (8).

When pressing the terminal (T), the male and female pressure parts (1e), (1e '), ..., (2e) of the plate parts (1f), (2f) that press the tubular wire connection part (t) ), (2
e ′), ..., Male and female pressure parts (1a), (1a ′) ..., (2a), (2a) of the plates (11), (12) that press the coated end (c). ′) ... It is formed one step higher and the diameter of the outer cover of the terminal (T) that holds the covered end (c) of the covered electric wire (K) is deformed by pressure from the outside. , Larger than the wire connection part.

Thus, the terminal holding member (6) is attached to the side surface of the male pressure member (2) shown in the lower part of the drawing on the male pressure member (2e), (2e ′) side.
Is attached to the side surface of the pressing body (2) by a screw (14) so that it can be slightly moved in both vertical and horizontal directions.
4) Pressing and pressing body by means of a helical spring (15) mounted around
It is elastically pressed toward the side of (2). This terminal holding body (6) is a recessed portion (6a) of a holding plate (16) made of a hard plastic having a groove-shaped recessed portion (6a) formed on the upper surface in the width direction.
The edge (19) on the opposite side to the upper edge (34) of the L-shaped metal fitting (13).
Then, the head (h) of the terminal (T) is inserted and fixed at an interval (6c), and the contact piece (17) of the L-shaped metal fitting (13) is fixed to the screw.
(14) is attached to the side surface of the pressurizing body (2).

As is apparent from FIG. 3, the recesses (6a) are provided at positions corresponding to the positions of the three kinds of protrusions (2a), (2a ') ... And the gap (6c) is The terminal to be inserted into this
The plate-shaped elastic material (24), which will be described later while leaving the thickness of (T), is formed in a vertical width so that it can be mounted in the gap. As a result, the terminal (T) is formed to have a vertical width sufficient to allow the head (h) to move in the thickness direction due to the pressure deformation of the wire connecting portion (t).

Using the terminal crimping tool with such a structure, the covered electric wire
To crimp connect the terminal (T) to the bare end (k) of (K), first,
As shown in FIG. 3, FIG. 6 and FIG. 7, the terminal (T) is inserted into an optional terminal holding recess (6a) according to the size of the terminal (T).
Insert the head (h) from the tip (Fig. 3, 5). After inserting the terminal (T) into the recessed part (6a) in this way, insert the bare end (k) of the wire (K) into the tube part of the wire connection part (t) of the terminal (T), and then cover the end. Position the part (c) on the plastic tube (p) (Fig. 6) and operate the operating levers (4) and (5) in the closing direction to close the pressure bodies (1) and (2). By doing so, the electric wire connection portion (t) covered with the plastic tube (p) of the terminal (T) and the covered end portion (c) of the electric wire covered with the plastic tube (p) are crimped and deformed at the same time, and the electric wire ( Bare end (k) and coated end of (K)
The terminal (T) is crimp-connected to (c) (Fig. 7).

The hard plastic pressing plate (16) is transparent,
When inserting the terminal (T) and inserting the electric wire (K), it is possible to visually confirm each insertion end through the holding plate (16), so that the reliability of the work can be improved. However, even an originally opaque metal plate such as aluminum can function to keep the length (S) constant.

When the tip portion (20) of the holding plate (16) is attached with the tip edge aligned with the contact piece (17) of the L-shaped metal fitting (13), the gap between the terminals (T) is formed.
Easy and accurate insertion into (6c). The holding plate (16) is fixed to the side of the male pressure body (2) with the screw (14) and a strong helical spring (15), but when pressing the wire connection part (t) of the terminal (T). When the cylindrical plastic insulation tube (p) and the wire connection part (t) extend in the depth direction, the terminal (T) moves downward in the slightly wide eye gap (6c), Since the extension margin can be absorbed without suppressing the extension of the connection portion (t), the mutual relational position of the electric wire (K) and the terminal (T) can be kept constant without being disturbed.

For the inner wall (6b) of the groove-like recess (6a), insert the tip of the bare end (k) of the wire into the plastic insulation tube (p) of the terminal (T) and the wire connection (t). It acts as a stopper that keeps the protruding length (S) of the bare end (k) accurately by stopping after abutting. That is, even if the wire connecting part (t) is compressed and extended, the tip of the bare end (k) has a constant protrusion length from the tip of the connecting part (t).
Since (S) can be retained, it has the effect of stabilizing the quality.

When pressing the terminal (T) from above and below, the wire connection part (t) and the head
If upward force is applied to the connection part with (h) and the connection part (t) and the lower surface of the head (h) remain horizontal, the head will be finished when finished.
Although (h) may bend upward from the connection part and damage the commercial value, it moves downward in the slightly wide eye gap (6c) of the terminal holder (6), so (t) and head
Since no force is applied to the connection part with (h), the terminal (T) does not bend, so there is no loss in quality. Spiral spring
Instead of (15), an elastic body such as rubber may be used to strongly attach the terminal holding body (6).

When the terminal (T) is attached to the crimping tool, the tip of the plastic insulation tube (p) contacts the front edge (20) of the holding plate (16) and automatically and stably holds it in the correct position. can do.

As in this embodiment shown in FIG. 3, if the recessed portion (6a) is formed in a laterally long manner over the front lateral width of the front edge of the pressing plate (16), the advantage of ease of manufacture can be obtained. .

However, the groove-like recessed portions (6a) of the holding plate (16) may be provided separately and independently at the positions corresponding to the pressure-bonded portions (1a) ... (2a).

The crimp terminal to be connected and connected to the electric wire by the terminal crimping tool according to the present invention is not limited to the flat donut-shaped terminal (T) as shown in FIG. Is suitable for crimping flat plate terminals (T), etc. Also, the shape of the wire connecting part (t) to be crimped and connected to the bare end (k) of the wire must be cylindrical like the connecting part (t) of the terminal (T) shown in FIG. Instead, it may be U-shaped in side view.

Further, in the embodiment of the terminal crimping tool shown in FIGS. 1 to 3, the crimping portions (1a) ..., (2a) ... Although it is shown that three crimped parts are formed,
It goes without saying that a) and (2a) may be single.

Further, another embodiment shown in FIG. 8 to FIG.
Terminal formed between 6) and the upper piece (18) of L-shaped metal fitting (13)
Between the inner surface of the upper piece (18) of the L-shaped metal fitting (13) and the inner surface of the holding plate (16) in the gap (6c) where the head (h) of (T) is inserted, the terminal (T)
The gap (6c) to insert the head (h) of is as a wide gap (G),
Resilient materials such as moltoprene and foamed rubber in this space (G)
(24) is attached to the entire inner surface of the upper piece (18).

Then, the elastic material (24) near the insertion opening of the gap (6c) is shaped to incline (25) toward the opening (FIG. 8).

If so, when inserting the terminal (T) into the gap (6c) as shown in FIG. 9, the elastic material (24) does not obstruct the insertion due to the inclination (25), and the terminal (T) is stopped. Even when you release the finger holding the terminal (T), the elastic force of the elastic material (24) causes the terminal (T) to
The terminal (T) is stopped by being pressed by the inner surface of (16) and can be held in the same posture.The terminal (T) does not separate from the gap (6c), so insert the next wire (K). Work and pressure deformation work can be done easily.

Also, when the operation lever is pressed, the terminal holder (6) is fixed by the force of the strong spring (15) and does not move, and even if the terminal (T) receives a pressing force and moves downward, While being elastically pressed and supported by the elastic material (24), it lowers in the same posture, so no external force is applied to the connection part between the wire connection part (t) and the head part (h) of the terminal (T), It never bends.

Therefore, the entire terminal (T) will not be distorted and deformed even in the finish.

The embodiment shown in FIGS. 11 to 13 is an embodiment in which a leaf spring is used as the elastic material (24).
When the (T) is deformed under pressure, the terminal (T) is lowered while being supported by the spring (24) with the terminal holder (6) fixed,
The terminal (T) does not cause strain deformation of the outer diameter.

In each of the above-mentioned embodiments, the terminal holder (6) is separated by the L-shaped metal fitting (13) and the holding plate (16) screwed thereto.
(6c) is shown as formed, but the terminal holder (6)
May be integrally formed of, for example, an aluminum die cast or a hard synthetic resin material.

<Effects of the Invention> With the above configuration, the present invention can exert the following remarkable effects.

In a manual terminal crimping tool equipped with a terminal holder (6) that holds the terminal in a fixed posture when it is pressed, the terminal holder is , Perpendicular to the side of the pressing body (2) by the screw (14),
Since it is attached so that it can move slightly in both horizontal directions, it is elastically pressed toward the side surface of the pressing body (2) by the helical spring (15) mounted around the screw (14). , It is possible to absorb the distorting force that causes bending and deformation between the terminal connection part and the head when crimping the terminal and the pressing force in the horizontal direction, so that the terminal can always be crimped properly and the terminal is held. The body can be formed with a small number of components and can be constructed at low cost and compactly. Moreover, when attaching and detaching the terminal holder, it can be done simply by rotating the screw (14), so that the detaching operation can be easily performed by anyone. .

Furthermore, a groove-like recess (6a) is formed at the edge of the holding plate (16) facing the pressing body (2), into which the bare end (k) of the electric wire (K) can be projected by a certain amount. Therefore, the bare end of the wire can always be protruded from the crimped terminal tip by a certain amount, so that the wire is always connected with a uniform coupling force without worrying about the insertion amount of the wire each time crimping. It can be connected to a crimp terminal.

The gap (6c) of the terminal holder (6) is the terminal to be inserted into this.
Since the plate-like elastic material (24) is formed in the vertical width so that the thickness width of (T) can be left, the elastic material is
Terminals inserted in the gap (6c) if (24) is not installed
If there is a gap above and below (T), or if the elastic material (24) is installed, the terminal (T) is elastically received by the elastic material (24), so the terminal (T) is When pressed, the terminal head can move up and down in the gap (6c), the force applied to the connection between the wire connection part (t) and the head part (h) is relaxed, and the terminal ( The deformation of T) can be prevented more reliably.

[Brief description of drawings]

1 to 10 are views showing an embodiment of the present invention. FIG. 1 is a side view of the whole, FIG. 2 is a plan view of the same, FIG. 3 is a perspective view of a tip portion, and FIG. 5 and 5 are vertical front views of main parts, FIGS. 6 and 7 are vertical front views of main parts sequentially showing the crimping procedure of terminals, and FIGS. 8 to 10 show another embodiment. FIGS. 11 to 13 are explanatory views sequentially showing the crimping procedure of the terminal of still another embodiment, which are vertical front views of the essential parts. In the figure, (1) and (2) are pressure bodies, (1a) and (2a) are crimping parts, (3) is a pivot pin, (4) and (5) are operating levers, and (6) is a terminal holder. Body, (6a) is a recess, (6b) is a back wall surface, (6c) is a gap, (13) is an L-shaped metal fitting,
(16) is a holding plate, (18) is an upper piece, (h) is a head, (K) is a covered wire, (k) is a bare end, (T) is a terminal, and (t) is a wire connection part. is there.

Claims (1)

[Scope of utility model registration request] 1. A terminal connected to a bare end (k) of a covered electric wire (K).
(T) a pair of male and female pressure bodies that deform the wire connection (t) under pressure
(1), (2) at one end, the pressurizing body (1), (2) is a pivot pin
A terminal crimping tool having a pair of operating levers (4), (5) on the other end side for opening and closing via (3), the upper piece (18) of the L-shaped metal fitting (13) and the holding plate (16). ) And a terminal holder (6) that forms a gap (6c) for inserting and holding the head (h) of the terminal (T).
The gap (6c) portion is located on one side of the male and female crimp portions (1a) and (2a) which are fitted to each other in the pressure bodies (1) and (2). A terminal crimping tool, which is mounted on the side of a pressure body (1 or 2), wherein the terminal holding body is
(6) is perpendicular to the side surface of the pressing body (2) by the screw (14),
It is attached so that it can move slightly in both horizontal directions, and it is elastically pressed toward the side surface of the pressing body (2) by a helical spring (15) mounted around the screw (14). A groove-shaped recess (6) that allows a certain amount of the bare end (k) of the wire (K) to project into the edge of the holding plate (16) facing the pressure body (2).
a) is formed, and the plate-like elastic material (24) can be mounted in the gap (6c) leaving at least the thickness width of the terminal (T) inserted therein. A terminal crimping tool formed with a vertical width.