JP2558212Y2 - Deformation correction tool for crimp terminal - Google Patents

Description

[Detailed description of the invention] [Industrial applications]

The present invention relates to a hand tool, and more particularly to a pliers-type tool for correcting deformation of a crimp terminal generated during crimping.

[0002]

2. Description of the Related Art In order to crimp a crimping terminal to a covered electric wire having a stripped end coating, a crimping tool having a crimping die composed of a crimper and an anvil is widely used. Crimping tools can be broadly classified into large tools that require a drive source such as hydraulic, pneumatic, and electric tools, and hand tools. Large tools and some hand tools include support members adjacent to the crimper and anvil to prevent crimp terminal deformation, ie, bend down (angle α in FIG. 4) and bend up (angle β in FIG. 5). I have.

[0003]

However, among the hand tools, a simple tool having two halves formed by punching a flat plate material is provided with a support member for preventing deformation such as bending down of a crimp terminal. Absent. Because if you add a support member,
This is because simple tools cannot be provided at low cost due to an increase in the number of parts processing and assembly steps. Therefore, when a simple tool is used, there is a high probability that deformation such as bend down occurs.
If deformation such as bend down occurs, the crimp terminal cannot be correctly mounted on the connector housing.

In addition, although the probability of occurrence of such a large tool is extremely low, deformation such as bending down has occurred. In the past, there was no suitable correction tool,
It has been common practice to discard such deformed terminals as defective products.

Therefore, an object of the present invention is to provide a tool for correcting deformation such as bending down of a crimp terminal in order to solve the above-mentioned problems.

[0006]

The deformation correcting tool for a crimp terminal according to the present invention is a pliers-shaped tool having a pair of halves provided with a grip portion at one end, and faces one of the halves. A protrusion protruding from the other half of the half is formed at the other end of the half, and a pedestal having a flat surface facing the protrusion and having a flat surface longer than the protrusion in the longitudinal direction of the half is provided at the other end of the half. It is characterized by being formed in.

[0007]

The concave side of the crimp terminal deformed during crimping is placed on the flat surface of the base. When the gripping portion is gripped, the deformed crimp terminal is supported at two points on the concave side by the base portion, and the deformation is corrected because the protrusion is pressed between the convex sides of the crimp terminal.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the deformation correcting tool for crimp terminals of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a deformation correcting tool 2 for a crimp terminal according to the present invention. Deformation correction tool 2
It comprises two substantially flat tool steel halves 4, 6 made of pliers which rotate about a support shaft 8. At one end of each half 4, 6, a plastic grip 10 is provided. Half 4 and 6 near the support shaft 8
Are opposed to each other to form core wire crimping dies 12 and 14 for crimping the core wire crimping portion 52 of the terminal 50 (FIG. 4) and the coating crimping die 16 for crimping the coating crimping portion 54, respectively. Coated crimping die 16 and gripper 1
The halves 4 and 6 face each other between 0 and 10 to form a plurality of wire covering strips 18 corresponding to the size of the wire W.

Usually, the core wire crimping dies 12 and 14 are properly used depending on the size of the core wire of the electric wire W to be used. However, in the case of a core wire crimping portion and an electric wire having a large size, only a compression ratio of about 100% (ratio of a core wire cross-sectional area before crimping to a core wire cross-sectional area before crimping) can be obtained. On the other hand, the following effects can be obtained by crimping the same core wire twice in the order of the core wire crimping type (large) 12 and the core wire crimping type (small) 14 in this order. That is, as shown in FIG. 6, first, the core wire crimping portion 52 is crimped over the whole by the core wire crimping die 12. Next, as shown in FIG. 7, a part of the core wire crimping part 52 is crimped by the core wire crimping die 14 whose width (t2) is smaller than the width (t1) of the core wire crimping die 12. Through these steps, a compression ratio (for example, 95% or less) that cannot be obtained with a conventional simple hand tool can be achieved in a part 52a of the core wire crimping portion 52. It should be noted that a similar effect can be obtained by crimping only with a core wire crimping type having a small anvil width. However, the compression ratio required by a single core crimping type (for example,
(95%), tear 53 of the core wire crimping portion 52 occurs as shown in FIG. The break 53 causes a problem that the terminal 50 does not enter the connector housing. Therefore, with the simple hand tool, particularly when crimping a large-sized core wire crimping portion and an electric wire, good crimping can be obtained by the two-time crimping.

Returning to FIG. 1, a projection 20 projecting toward the half 6 is formed at the other end of the half 4, and the other end of the half 4, 6 Long flat surface 22
A base 22 having a is formed. The protrusion 20 and the base 22 are opposed to each other with an interval (when the tool 2 is closed) corresponding to a typical crimping height (for example, 1 mm), and constitute a deformation correcting portion of the terminal 50. Projection 20 and base 22
The recesses 24 and 26 for escaping the cover crimping portion 54 of the terminal 50 are formed on the adjacent front end side, and the recesses 28 for escaping the contact portion 56 of the terminal 50 with the counterpart terminal (not shown) on the support shaft 8 side. , 30 are formed respectively.

FIGS. 2 and 3 are enlarged views showing a state before and after the terminal 50 is corrected by the deformation correcting tool 2 according to the present invention, respectively. The core wire crimping portion 52 is placed on the flat surface 22a of the base portion 22 so that the curved convex side 58 of the crimp terminal 50, which has been bent down by the core wire crimping dies 12, 14 and the like, faces the projection 20. When the gripping portions 10 and 10 of the tool 2 are gripped, the curved concave side 60 of the crimp terminal 50 is moved to the edge 22 b of the base portion 22 on the support shaft 8 side and the concave portion.
The core wire crimping portion 52 on the convex side 58 is pressed by the edge 20b or the surface 20a of the projection 20. When the gripping portions 10 and 10 are further gripped, the curved core wire crimping portion 52 is
It is sandwiched between the flat surface 22a of the base portion 22 and the flat surface 22a, and the bend down is corrected as shown in FIG.

Incidentally, even when the crimp terminal 50 'is bent up as shown in FIG. 5, the concave side of the core wire crimping portion 52' is bent.
The bend-up can be corrected by placing the 60 'on the flat surface 22a of the base 22 and going through the same process.

The preferred embodiment of the crimp terminal deformation correcting tool of the present invention has been described above. However, the present invention should not be limited to only the above embodiment, and various modifications and
It goes without saying that changes are possible. For example, the crimp terminal may have a male contact such as a tab. Further, the tip of the projection is not limited to a plane but may be, for example, a circle. Furthermore, when there is no step due to the covering crimping portion on the bottom surface of the crimp terminal, the base 22 may be extended to the tip without providing the concave portion 26 adjacent to the base 22. Also, in the specific embodiment of the deformation correcting tool of the present invention, a correcting portion is added to the conventional simple crimping hand tool, so that there is an advantage that crimping and deformation correction can be performed without holding the tool, but there is an independent crimping type having no crimping die. It is also possible to use a deformation correction tool.

[0015]

According to the crimp terminal deformation correcting tool of the present invention, a crimp terminal that has been conventionally discarded as a defective product can be corrected and used, so that the yield of crimp terminals can be improved. .

Further, when the deformation correcting tool of the present invention is added to the tip of the simple crimping tool, a series of steps of crimping and deformation correcting can be performed by one tool, so that the working efficiency is improved. Have.

Further, the deformation correcting tool of the present invention can be formed at a very low cost because the half thereof can be formed by pressing a flat plate material, and there is no need to attach a conventional supporting member.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a deformation correcting tool for a crimp terminal according to the present invention.

FIG. 2 is an enlarged view of the tool of FIG. 1 before deformation correction.

FIG. 3 is an enlarged view of the tool of FIG. 1 after deformation correction.

FIG. 4 is a side view showing an example of a crimp terminal that has been bent down.

FIG. 5 is a side view showing an example of a crimp terminal that has been bent up.

FIG. 6 is a view showing a state where the core wire crimping die 12 is crimped.

FIG. 7 is a view showing a state where the core wire crimping die 14 is crimped.

FIG. 8 is a diagram showing a problem when crimping is performed only by the core wire crimping die 14;

[Explanation of symbols]

 2 Deformation correction tool for crimp terminal 4, 6 Half 10 Grip 20 Protrusion 22 Base 22a Flat surface

Claims (1)

(57) [Scope of request for utility model registration] 1. A pliers-like tool having a pair of halves having a grip at one end, wherein a protrusion protruding toward one of the halves is formed at the other end of the other half. A deformation correcting tool for a crimp terminal, characterized in that a base portion facing the projection and having a flat surface longer than the projection in the longitudinal direction of the half body is formed at one other end of the half body.