JP3508237B2 - Wire crimp terminal - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crimp terminal for an electric wire used when connecting an electric wire, such as a stranded wire, to a quick-connecting type connector.

[0002]

2. Description of the Related Art As a conventional crimping terminal of this type, for example, a plurality of insertion pins fixed to a core wire of a multi-core electric wire and having tips connected to a quick-connecting connector, and the tips of the insertion pins are passed through. A holder body in which the insertion pins are individually housed, and a pair of covers that are rotatably attached to the upper and lower surfaces of the holder body and that are closed by sandwiching the original portion of the wire after the holder body is attached to the insertion pins. It is known that it is composed of.

[0003]

However, in the case where the electric wire is sandwiched between the pair of covers as in the prior art, it is difficult to surely position the electric wire in the inserting direction when the holder is fitted. Therefore, there is a problem that the electric wire is easily detached when a tension load is applied to the electric wire.
Especially, there is a problem that the same tension removing effect cannot be obtained for electric wires having different electric wire diameters. For example, the wire diameter is 3.5
When connecting one of the two wire mm ² and 5.5 mm ² to crimp terminals, in the crimp terminal to be able to connect hardly out of the wire of 3.5 mm ^2, the 5.5 mm ² wires If you try to pinch between the covers, the wire cannot be pinched between the covers and a large force is required to fit the holder. Conversely, a 5.5 mm ² wire is a crimping terminal that is difficult to disconnect. Then, when trying to sandwich a 3.5 mm ² electric wire between the covers, the electric wire moves and cannot be held between the covers, and the electric wire easily comes off. For different electric wires, it was necessary to manufacture crimp terminals with different shapes for each electric wire diameter.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to facilitate positioning of an electric wire when a holder is fitted, and even if the electric wire has a different diameter. An object of the present invention is to provide a crimp terminal for an electric wire that can lock the electric wire against a tension load with difficulty and obtain an equivalent tension removing effect, and can easily perform a fitting operation of a holder. The point is to provide a crimp terminal for an electric wire that can prevent the holder from being disassembled even when the hinge portion that connects the holder body and the cover is broken after the holder is fitted. The purpose is to provide a crimp terminal for electric wires that allows the holder to be easily disengaged from the outside of the holder, and yet another purpose is to prevent misalignment of the holder. The purpose of the present invention is to provide a crimp terminal for an electric wire that can increase the tension removal effect correctly, and yet another object is to prevent the holder from mating when the insertion pin is not fully inserted into the holder body. An object of the present invention is to provide a crimp terminal for an electric wire, which can prevent the insertion pin from being used in a state in which the protruding width is short.

[0005]

In order to solve the above-mentioned problems, the present invention provides a plurality of insertion pins 4 fixed to a core wire 3 of a multi-core electric wire 2 and having its tip connected to a quick-connecting type connector. ,
A holder body 6 in which the insertion pins 4 are individually housed by penetrating the tips of the insertion pins 4, and a holder body 6 which is rotatably attached to the upper and lower surfaces of the holder body 6, respectively, and is attached to the insertion pins 4 to attach an electric wire. A crimp terminal for an electric wire, comprising a pair of covers 7 and 8 that are closed so as to sandwich the base portion 10 of the electric wire 2. The electric wire diameters D ₁ and D are provided on the opposing surfaces of the pair of covers 7 and 8.
₂ is provided s husband and side locking claw 18 after a lower projecting height than the front locking claw 17 and the front locking claws 17 which can sandwich the original portion 10 of different wire 2A or 2B, the front locking claws 17及
And the rear side locking claw 18 penetrates the insertion pin 4 through the holder main body 6.
By closing the pair of covers 7 and 8 in this state,
It is shaped so as to be hooked on the original portion 10 of the electric wire 2, and the rear side locking claw 18 is positioned so as to be displaced to the side B opposite to the holder main body 6 side with the front side locking claw 17 interposed therebetween, and the rear side locking is performed. Nail 18
Stage of the core wire 3 of the electric wire 2B in accordance with the wire diameter D ₂ such that the tip of the original portion 10 of the locked by the wire 2B is located opposite B to the holder body 6 side across the front engagement pawl 17 The feature is that the squeeze dimension L ₂ is different.

The front end portions of the covers 7 and 8 are hinge portions 9
Is rotatably connected to both side surfaces of the holder main body 6 via, respectively, and any one of the abutting surfaces of the holder main body 6 and the covers 7 and 8 in a state where the covers 7 and 8 are closed around the hinge portion 9. A fitting protrusion 20 is provided on one of the two sides, and a fitting hole 21 is formed on the other side to hold the covers 7 and 8 in a closed state. Is preferred.

A fitting claw piece 1 is provided on the outer surface of the one cover 7.
3 is projected, and the covers 7, 8 are provided on the outer surface of the other cover 8.
Fitting groove 14 with which the fitting claw piece 13 fits in a state in which the
And the fitting claw piece 13 and the fitting groove 14 from the outside of the covers 7 and 8.
It is preferable to form a releasing groove 15 for releasing the fitting state with. First positioning concavo-convex portions 22 and 23 for respectively positioning the covers 7 and 8 with respect to the holder body 6 in a state where the covers 7 and 8 are closed on the facing surfaces of the holder body 6 and the covers 7 and 8. Is provided, and each cover 7, 8 is provided on the facing surface of each cover 7, 8 away from the holder body 6.
It is preferable to provide second positioning concave-convex portions 24 and 25 for positioning the covers 7 and 8 with each other in the closed state.

Only when the insertion pin 4 of the electric wire 2A or 2B is not completely inserted into the holder main body 6 on the surface of the cover 7 or 8 facing the electric wire 2A or 2B, the cover 7 or 8 is brought into contact with the insertion pin 4. Preferably, ribs 26 are provided so as to prevent 8 from being closed.

[0009]

According to the present invention, however, the pair of covers 7, 8 are
2A or 2B with different wire diameters D ₁ and D _{2 on} the opposite surface of
A front locking claw 17 capable of sandwiching the base portion 10 and a rear locking claw 18 having a lower projecting height than the front locking claw 17 are provided respectively , and the front locking claw 17 and the rear locking claw 18 are , Insert pin
Cover 4 with holder body 6 penetrating
By closing 7, 8
Since it has a hanging shape , at least one of the front side locking claw 17 and the rear side locking claw 18 is attached to the original portion 10 of the electric wire 2A or 2B inserted between the pair of covers 7 and 8 when the holder 5 is fitted. By being caught, the electric wire 2A or 2B can be easily positioned. Further, since the rear side locking claws 18 are positioned so as to be shifted to the side B opposite to the holder body 6 side with the front side locking claws 17 sandwiched therebetween, when the wire diameters D ₁ and D _{2 of} the wires 2A and 2B are different, If the wire diameter D ₁ is small, wire 2A
By closing the covers 7 and 8 so that the original portion 10 of the wire is hooked on the front side locking claw 17, the electric wire 2A having a small diameter can be positioned by the front side locking claw 17, while when the wire diameter D ₂ is large, the electric wire 2B can be positioned. The large-diameter electric wire 2B is positioned by the rear locking claw 18 by closing the covers 7 and 8 by hooking the original part 10 of the rear locking claw 18 having a lower protruding height than the front locking claw 17 to close the covers 7 and 8. As a result, even if the wire diameters D ₁ and D _{2 are} different, the same tension removing effect can be applied to the tension load, and the wire can be locked without coming off easily. Moreover, according to the wire diameter D ₂ , the tip of the base portion 10 of the electric wire 2B locked by the rear locking claw 18 is positioned on the side B opposite to the holder body 6 side with the front locking claw 17 interposed therebetween. Since the stepped dimension L ₂ of the core wire 3 of the electric wire 2B is made different, it is possible to prevent the base portion 10 of the electric wire 2A having a large electric wire diameter D ₁ from being caught by the front side locking claw 17, and accordingly, the protrusion height H ₁ , The pressing margins of the front side locking claw 17 and the rear side locking claw 18 having different H ₂ are the wire diameter D ₁ ,
Even if D ₂ is different, it becomes the same, and the force required for fitting the holder 5 becomes substantially constant.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 2, the crimp terminal 1 used in this embodiment has a core 3 of a three-core electric wire 2 (for example, a VCT cable) which is caulked and fixed to a base end thereof, and a tip of which is a quick-connecting type connector (see FIG. It is composed of three rod-shaped insertion pins 4 connected to (not shown) and an insulating holder 5 for accommodating each insertion pin 4 integrally.

The holder 5 includes a holder body 6 in which the insertion chambers 11 in which the insertion pins 4 are individually housed are arranged side by side in a lateral direction corresponding to the number of the insertion pins 4. A pair of covers 7, which are rotatably attached to the upper and lower surfaces of the holder body 6 via hinges 9 and which are closed after the holder body 6 is attached to the insertion pin 4 so as to sandwich the original portion 10 of the electric wire 2. 8 and. In the holder body 6, the insertion pin 4 is inserted into the front opening of the insertion chamber 11 of the insertion pin 4.
The pin cover 12 is attached so that the tip of the pin cover is penetrated.

Further, a pair of fitting claw pieces 13 are provided on the outer surface of the cover 7 at positions apart from the holder body 6, and the outer surface of the cover 8 is closed with the covers 7 and 8 closed. Fitting grooves 14 into which the fitting claw pieces 13 are fitted are respectively formed, and the fitting claw pieces 13 and the fitting groove 14 are fitted at the corners of the fitting groove 14, as shown in FIG. A release groove 15 for releasing the combined state is formed. Then, by inserting a tool such as a flat-blade screwdriver 16 into the releasing groove 15 and rotating it in the direction of the arrow in FIG. 4, the fitting state between the fitting claw piece 13 and the fitting groove 14 can be released. .

In addition, the facing surfaces of the covers 7 and 8 are shown in FIG.
As shown in FIG. 6, a front side locking claw 17 capable of sandwiching the original portion 10 of the electric wire 2A or 2B having different electric wire diameters D ₁ and D ₂ ;
Rear locking claws 18 having a lower protrusion height than the front locking claws 17
And the rear side locking claws 18 are located on the side B opposite to the holder body 6 side with the front side locking claws 17 interposed therebetween. In this embodiment, the front locking claw 17 is set to a protrusion height H ₁ that can lock the electric wire 2A having a wire diameter D ₁ of 3.5 mm ² , and the rear locking claw 18 is 5.5 mm ² for example. The projection height H ₂ (<H ₁ ) is set so that the electric wire 2B having the electric wire diameter D ₂ can be locked.
7 and 18, the effect of removing the tension of the electric wires 2A and 2B can be obtained. In addition, the core wire 3 of the electric wire 2A of 3.5 mm ²
The step length dimension L ₁ is set to such a length that the original portion 10 of the electric wire 2A can be hooked on the front side locking claw 17 in a state where the insertion pin 4 penetrates the holder body 6, while it is 5.5.
stage stripping dimension L ₂ of the core wire 3 of mm ² of the wire 2B is dimensioned to the original portion 10 of the electric wire 2B inserted pin 4 in a state of being through the holder body 6 caught only the rear locking claws 18, That is, the length of the tip of the original portion 10 of the electric wire 2B is set so that it can be located on the side B opposite to the holder body 6 with the front locking claw 17 interposed therebetween.

However, when the wire diameter D ₁ is small (for example, 3.5 mm ² ), as shown in FIG. 1A, the original portion 10 of the wire 2A is locked from the rear locking claw 18 to the front locking. Nail 17
The stepped dimension L ₁ of the core wire 3 is shortened to such an extent that the insertion pin 4, which is caulked and fixed to the tip of the core wire 3, can penetrate the holder body 6 in a state of being opposed to each other. Then, by closing the covers 7 and 8 with the insertion pin 4 penetrating the holder body 6, the fitting claw piece 13 (FIG. 2) of one cover 7 is fitted into the fitting groove 14 (FIG. 2) of the other cover 8. 2) can be fitted to hold the covers 7 and 8 in a closed state, and the electric wire 2A
The original portion 10 of is fixed in tension by the front locking claw 17. At this time, both the front side locking pawl 17 and the rear side locking pawl 18 are hooked on the base portion 10 of the electric wire 2A, but the base portion 10 of the electric wire 2A is mainly the front side locking pawl 17 having a high protrusion height H _1. The tension will be stopped at.

On the other hand, when the wire diameter D ₂ is large (for example, 5.5 mm ² ), as shown in FIG.
With the original portion 10 of B facing only the rear side locking claw 18, the stepping dimension L ₂ (>) of the core wire 3 to the extent that the insertion pin 4 fixed by crimping to the tip of the core wire 3 can penetrate the holder body 6
Make L ₁ ) longer. Then, when the pair of covers 7 and 8 are closed with the insertion pin 4 penetrating the holder body 6, the fitting claw piece 13 (FIG. 2) of one cover 7 is fitted into the fitting groove 14 ( 2), the covers 7 and 8 can be held in a closed state, and only the rear side locking claw 18 is caught on the original part 10 of the electric wire 2B, and the original part 10 of the electric wire 2B is locked by the rear side locking claw. It will be tensioned only by 18.

As described above, even when the wire diameters D ₁ and D ₂ of the electric wires 2A and 2B are different from each other, the front locking claw 17 or the rear side of the front portion of the electric wire 2A or 2B is fitted to the original portion 10 of the electric wire 2A or 2B when the holder 5 is fitted. By hooking at least one of the locking claws 18, the electric wires 2A and 2B can be easily positioned, and an equivalent tension removing effect can be obtained against a tension load.
Moreover, since the stepped dimension L ₂ of the electric wire 2B is changed according to the difference in the electric wire diameter D ₂ , the electric wire 2A having a large electric wire diameter D ₁
Since it is possible to prevent the original portion 10 of the front part from being caught by the front side locking claw 17, the pressing margin of the front side locking claw 17 and the rear side locking claw 18 (when the covers 7 and 8 are closed, the locking claw 17 or 18 is an electric wire). Even if the wire diameters D ₁ and D ₂ are different, the size of pressing the covers 7 and 8 until they are completely locked to the original portion 10 of 2A or 2B is the same, and the force required for fitting the holder 5 is substantially constant. Therefore, the fitting operation of the holder 5 can be easily performed.

Further, in the present embodiment, the outer claw type in which the fitting claw piece 13 is projected to the outside of the cover 7 is used, and the fitting groove 14 and the releasing groove corresponding to the fitting claw piece 13 are provided on the outside of the cover 8. 15
Since the and are provided, a slotted screwdriver 1 is provided in the release groove 15.
The covers 7 and 8 can be easily opened from the outside only by inserting 6 and rotating. By the way, in the past, many of the inner claw types have locking claws inside the cover. In this case, it is easy to disengage the holder when tension is applied, or it is relatively difficult to disengage the holder. However, according to the present invention, it becomes difficult for the holder 5 to come off from the tension load, and at the same time, the operation for releasing the fitting of the holder 5 can be easily performed.

Further, in the above embodiment, the front end portions of the covers 7 and 8 are rotatably connected to both side surfaces of the holder body 6 through the hinge portions 9, respectively, but as shown in FIG. A tapered fitting protrusion 20 is provided on the outer surface of each of the covers 7 and 8 on the hinge portion 9 side, and the fitting protrusion 20 is fitted on the outer surface of the holder body 6 on the hinge portion 9 side. A fitting hole 21 for holding the closed state of 7 and 8 may be provided as a recess. In this case, when the holder 5 is fitted, the tapered fitting protrusion 20 is introduced into the fitting hole 21, so that the holder body 6 and the covers 7 and 8 can be easily positioned and the holder 5 can be fitted. Even if the hinge portion 9 is broken after the joining, the covers 7 and 8 and the holder body 6 have a hooking structure that does not separate from each other, and there is an advantage that the holder 5 can be prevented from being disassembled.

Further, as shown in FIG. 2, the covers 7 and 8 are positioned with respect to the holder body 6 with the covers 7 and 8 closed on the opposing surfaces of the holder body 6 and the covers 7 and 8, respectively. The first positioning concave-convex portions 22 and 23 are provided to position the covers 7 and 8 relative to the facing surfaces of the covers 7 and 8 which are separated from the holder body 6 with the covers 7 and 8 closed. It is also possible to provide two positioning uneven portions 24 and 25. In this embodiment, the holder main body 6 and the cover when the covers 7 and 8 are closed by fitting the first positioning concave-convex portions 22 and 23 to each other and the second positioning concave-convex portions 24 and 25 to each other. It is possible to prevent the deviation between the covers 7 and 8 and the deviation between the covers 7 and 8 respectively. By the way, in the past, when the holder is fitted, the fitting is often difficult due to the vertical displacement of the cover, and further, the tension removing effect cannot be increased due to the deformation of the holder itself. Since the positioning irregularities 22, 23; 24, 25 provided at the two front and rear positions can correct the fitting deviation of the holder 5 and prevent the holder 5 itself from being deformed, the tension removing effect can be enhanced and the cover Since the covers 7 and 8 are automatically positioned by simply closing the covers 7 and 8, the fitting operation is further facilitated.

Further, as shown in FIGS. 2 and 6, the insertion pin 4 of the core wire 3 is not completely inserted into the holder body 6 on the surface of the covers 7 and 8 facing the electric wire 2A or 2B. A rib 26 for preventing incomplete insertion may be provided so as to prevent the covers 7 and 8 from coming into contact with the cover 4 and being closed. That is,
If the insertion pin 4 of the electric wire 2A or 2B is not completely inserted into the holder body 6 when the holder 5 is fitted, the protrusion margin C of the insertion pin 4 from the holder body 6 becomes short, and the connection with the connector is made. Although the state may become incomplete, in the present invention, when the insertion pin 4 is incompletely inserted, the rib 26 hits the base end portion 4a of the insertion pin 4 in the direction indicated by the arrow G in FIG. Since it becomes impossible to close 7, 8 and the cover 7, 8 can be closed only after the insertion pin 4 is completely inserted, it is possible to prevent the insertion pin 4 from being used in an incompletely inserted state. Therefore, there is an advantage that the connection state with the connector can always be maintained in a perfect state.

[0021]

As described above, according to the first aspect of the invention, the front locking claw capable of sandwiching the original portions of the wires having different wire diameters on the opposing surfaces of the pair of covers and the front locking claw. and side locking pawl provided respectively after even lower protrusion height, front engagement Tometsume及
And the rear side locking claws are in a shape with the insertion pin penetrating the holder body.
Close the pair of covers in the
It has a hooked shape, and positions the rear locking claws on the side opposite to the holder body side with the front locking claws sandwiched between them. Since the step size of the core wire of the wire is changed according to the wire diameter so that the tip is located on the side opposite to the holder body side with the front locking claw sandwiched, it is inserted between the pair of covers when the holder is fitted. By closing the cover by hooking at least one of the front side locking claw or the rear side locking claw on the original part of the electric wire
The wires can be easily positioned, and even if the wires have different diameters, they can be locked with the same tension removal effect against tension loads, making it difficult for the wires to come off. As a result, it is not necessary to manufacture a crimp terminal having a different shape for each wire diameter. In addition, by varying the step size of the core wire according to the wire diameter, it is possible to prevent the original part of the wire with a large wire diameter from being caught in the front locking claw, and the front locking claw and the rear locking accordingly. The pressing margins of the claws are the same even if the wire diameters are different, and the force required for fitting the holder is substantially constant, so that the holder can be easily assembled.

According to the second aspect of the present invention, the front end portion of each cover according to the first aspect is rotatably connected to both side surfaces of the holder main body through the hinge portion, and each cover is centered on the hinge portion. In order to keep the cover closed by projecting a fitting protrusion on one of the abutting surfaces of the holder body and each cover in the closed state, and by fitting the fitting protrusion on the other In addition to the effect of claim 1, the fitting structure of the fitting projection and the fitting hole facilitates the positioning of the holder body and the cover.
Even if the hinge part is temporarily cut after fitting the holder, the cover and the holder body have a hooking structure that does not separate from each other, and it is possible to prevent the holder from being disassembled.

According to a third aspect of the present invention, a fitting claw piece is provided on the outer surface of one cover according to the first aspect of the invention, and the cover is fitted on the outer surface of the other cover in a closed state. The effect according to claim 1, wherein a fitting groove into which the mating claw piece is fitted and a releasing groove for canceling the fitted state of the fitting claw piece and the fitting groove from the outside of the cover are formed. In addition, the fitting force of the holder is increased by fitting the fitting claw piece and the fitting groove, and the structure is such that the wire does not easily come off against the tension load, and the tension removing effect can be fully exerted, as well as for releasing. With the groove, it is possible to easily perform the fitting release operation of the holder from the outside of the holder.

Further, according to the invention of claim 4, the first positioning for positioning the respective covers with respect to the holder main body in a state where the respective covers are closed on the facing surfaces of the holder main body and the cover according to the first aspect. 2. The effect according to claim 1, further comprising: a concave-convex portion for positioning, and a second positioning concave-convex portion for positioning each cover with respect to each other when the covers are closed, on the facing surface of each cover separated from the holder body. In addition, since the fitting unevenness of the holder can be corrected by the positioning concavo-convex portions provided at the front and rear portions to prevent the holder itself from being deformed, it is possible to enhance the effect of removing the tension.

According to the invention of claim 5, the cover of claim 1 is brought into contact with the electric wire only when the insertion pin of the electric wire is imperfectly inserted into the holder body. In addition to the effect according to claim 1, in addition to the effect of claim 1, when the insertion pin of the holder body is not completely inserted, the rib fits the holder. It is possible to easily know that the protrusion width of the insertion pin from the holder body is too small by preventing the insertion, and it is possible to prevent the holder from being used in the state where the protrusion width of the insertion pin is short. There is an effect of improving.

[Brief description of drawings]

1A and 1B are cross-sectional views showing a locked state of wires having different wire diameters according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the above crimp terminal.

FIG. 3 is a perspective view when the above holder is fitted.

FIG. 4 is an operation explanatory diagram when the fitting of the above holder is released.

FIG. 5 is a perspective view of a main part near the hinge part of the above.

FIG. 6 is an explanatory view of the operation of the above rib.

[Explanation of symbols]

2A, 2B Electric wire 3 Core wire 4 Insertion pin 6 Holder body 7, 8 Cover 9 Hinge part 10 Original part 13 Fitting claw piece 14 Fitting groove 15 Release groove 17 Front locking claw 18 Rear locking claw 20 Fitting protrusion 21 fitting hole 22, 23 a first positioning concave-convex portion 24, 25 second positioning concave-convex portion 26 rib B opposite D _1, D ₂ diameter of the electric wire H _1, H ₂ protruding height L _1, L ₂ stage stripping Size

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-5-152032 (JP, A) Actual flat 2-46385 (JP, U) Actual flat 4-123070 (JP, U) Actual flat 3- 22360 (JP, U) Actual flat 6-29030 (JP, U) Actual flat 5-27975 (JP, U) Actual flat 6-44048 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01R 13/58

Claims (5)

(57) [Claims] 1. A plurality of insertion pins fixed to a core wire of a multi-core electric wire and having tips connected to a quick-connecting connector, and a holder body in which the insertion pins are individually housed so as to pass through the insertion pins. A crimp terminal for an electric wire, comprising a pair of covers rotatably attached to the upper and lower surfaces of the holder main body and closed by sandwiching the original portion of the electric wire after the holder main body is attached to the insertion pin, and side locking pawl after a lower projecting height than the front locking claw and capable front locking claw wire diameter sandwich the original portion of the different wires respectively provided on the facing surfaces of the pair of covers, front engaging claws and For the rear side locking claw, insert the insertion pin
Close the pair of covers with the rudder body penetrated.
Makes it possible to catch the front part of the electric wire, position the rear side locking claw on the side opposite to the holder body side with the front side locking claw in between, and lock the rear side locking claw. An electric wire characterized in that the step size of the core wire of the electric wire is changed according to the electric wire diameter so that the tip of the original portion of the electric wire is located on the side opposite to the holder main body side with the front locking claw interposed therebetween. Crimp terminal. 2. A front end portion of each cover is rotatably connected to both side surfaces of the holder main body via a hinge portion, and the holder main body and each cover are closed in a state where each cover is closed around the hinge portion. A fitting protrusion is provided on one of the butting surfaces, and a fitting hole for holding the cover closed by fitting the fitting protrusion is provided on the other of the other. The crimp terminal for an electric wire according to claim 1. 3. A fitting groove in which a fitting claw piece is projected on an outer surface of one cover, and a fitting groove into which the fitting claw piece fits with each cover closed on the outer surface of the other cover, and a cover. 2. The crimp terminal for an electric wire according to claim 1, further comprising a releasing groove for releasing the fitting state of the fitting claw piece and the fitting groove from the outside. 4. A first positioning concavo-convex portion for positioning each cover with respect to the holder main body in a state where the respective covers are closed is provided on a surface facing the holder main body and the cover, and each cover separated from the holder main body. 2. The crimp terminal for an electric wire according to claim 1, wherein a second positioning concave-convex portion for positioning each cover in a state where each cover is closed is provided on the opposing surface of. 5. A cover for preventing a state in which each cover is closed by abutting the insertion pin of the electric wire on the surface of the cover facing the electric wire only when the insertion pin of the electric wire is imperfectly inserted into the holder body. The crimp terminal for an electric wire according to claim 1, wherein the rib is provided so as to project.