JPH11205965A - Wire retainer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire retainer which can clamp multi-size of wires and has high durability. SOLUTION: A wire retainer C1 is provided with a wire insert groove 15 formed between the opposed inner wall surfaces of a pair of wire clam pieces 19 protruding from a base part 13, a slot 20 formed near the base part 13 of the wire clamp pieces 19, a first slit 22a in which a thin wire clamp wall 18 is formed at the inner wall surface of the wire clamp piece 19, a second slit 22b which is bent from the end part of the first slit 22a and extends roughly parallel to the slot 20, and a jointing thin wall part 23 formed between the second slit 22b and the slot 20. A thin wall part 21 can be formed between the outer wall surface of the wire clamp piece 19 and the end part of the slot 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to automatic wiring of electric wires, automatic bottom cutting of electric wires, automatic stripping of the ends of the electric wires, and automatic connection of terminals to the ends of the stripped electric wires. Crimping,
The present invention relates to a wire holder used for a device for automatically inserting a terminal with a wire into a connector housing.

[0002]

2. Description of the Related Art An electric wire holder is an auxiliary tool for temporarily holding an electric wire and moving and positioning the same on a transfer line of an automatic apparatus. No. 1-313812, JP-A-1-3138
No. 72, etc.). As shown in the front view of FIG. 7, the structure of the electric wire holder A has a rectangular parallelepiped base 1 and a pair of electric wire holding pieces 2 and 2 protruding from an upper end surface of the base 1. An electric wire insertion groove 3 is formed between the pieces 2 and 2.

A support member B for supporting a large number of wire holders A
, The groove 4 opening on the upper surface penetrates the support member B in the longitudinal direction. The base 1 of the wire holder A can be inserted into the groove 4, but cannot be inserted or removed from the upper opening of the groove 4.
A large number of electric wire holders A are sequentially inserted from the end of the groove 4 and are arranged in a pushed state. The large number of wire holders A pushed into the grooves 4 are arranged at a predetermined pitch in the longitudinal direction of the support member B, and their positions are fixed by stoppers 5 screwed to the wire holders A.

A support member B on which a plurality of wire holders A are arranged and mounted is conveyed to a wire cutting station, a peeling station, a terminal crimping station, and a terminal insertion station on the conveyor, and is positioned and positioned at each station. Processing of the electric wire W held by the holder A is performed.
In order to hold the electric wire W on the electric wire holder A, the electric wire W is pushed near the end of the electric wire W into the electric wire insertion groove 3 of the electric wire holder A, and the electric wire W is held by the elastic force of the pair of electric wire holding pieces 2.

When the supporting member B is positioned at the cutting station, the end of the wire W is cut, and the cut end of the wire W is inserted into the wire insertion groove 3 of the adjacent wire holder A,
One wire W is gripped at both ends by two wire holders A adjacent to each other, the end of the wire W is peeled at the next station, and the connection terminal is crimped to the exposed wire conductor. Then, the crimped terminal is automatically inserted into the terminal receiving chamber of the connector housing. After all the automatic processing is completed, the clamp device grasps the electric wire W and moves up, and the electric wire W is removed from the electric wire holding piece 2.

[0006]

When the wire W having a small diameter is pushed into the wire insertion groove 3, the amount of bending deformation of the pair of wire holding pieces 2, 2 is small, so that the wire W is easily pushed in, and The wire holding pieces 2 and 2 hold the wire W with a small elastic force. When the wire W having a large diameter is pushed into the wire insertion groove 3, a large pressing force is required, and the wire holding piece 2 is largely bent and deformed to widen the tip width of the wire insertion groove 3. Therefore, the electric wire holder A cannot be used as the electric wire W of multiple sizes. There are the following two types of wire holders that can hold multiple size wires W.

As shown in FIG. 8, one type of electric wire holder A ₁ is provided with a concave groove 8 penetrating through the center of the base 7 in the width direction on the upper surface of the base 7 having a rectangular parallelepiped shape. Pins 9 are provided on both sides to penetrate the base 7 via the grooves 8. The central portion of a leaf spring 10 bent in a U-shape is placed in the concave groove 8, and the lower ends of the pair of electric wire holding pieces 11, 11 are pivotally attached to the pins 9, respectively.

The leaf spring 10 urges the pair of wire holding pieces 11 in the closing direction, and the wire W inserted into the wire insertion groove 12 between the pair of wire holding pieces 11 is
Is held between the pair of electric wire holding pieces 11 receiving the elastic force.
Since the leaf spring 10 can undergo large elastic bending deformation, the electric wire W
Although the wire W can be pinched even if the diameter of the wire spring fluctuates slightly, stress is concentrated on the bent portion 10a of the leaf spring 10, and there is a disadvantage that the wire W is broken during long-term use.

[0009] the wire holder A ₂ Another form, FIG. 9
As shown in FIG. 1, the base 13 and the pair of wire holding pieces 14 are of an integral structure, and the wire insertion groove 1 is provided between the pair of wire holding pieces 14.
5 is formed in the same manner as the wire holder A of FIG. 7, but the wire insertion groove 15 is provided near the inner wall surface of the wire holding piece 14.
The slit 17 is provided substantially parallel to the above, and a thin-walled wire holding wall 18 that is easily elastically deformed is formed between the inner wall surface of the wire holding piece 14 and the slit 17. Reference numeral 16 denotes a reinforcing rib provided on the outer wall surface of the electric wire holding piece 14.

[0010] In the electric wire holder A ₂ is configured, when pushed the wire W to the wire insertion groove 15, wire holding wall 18 is easily deformed, the tip width of the wire insertion groove 15 is hardly spread Therefore, the electric wire W does not fall off. Wire holder 1
8, the wire 17 can be elastically deformed until the width of the slit 17 becomes zero. However, when a larger wire W is inserted, the wire holding piece 14 is elastically deformed and the tip width of the wire insertion groove 15 is increased (FIG. 10). reference).

The electric wire holding piece 14 has a large thickness on the base 13 side.
Since the shape is not easily elastically deformed, the diameter of the electric wire W increases.
And the problem that a large insertion force is required
The width of the tip of the wire widens and the wire W easily falls off.
Therefore, electric wire holder A_TwoSize of electric wire W used for
There is a limit. Also, wire holder A_TwoIs integrated with the mold
Weld line L when formed ₁However, thin wire insulation
It is almost at the center of the holding wall 18 and grips the electric wire W
Since it coincides with the region where the elastic deformation occurs greatly,
8 was easily damaged. The present invention solves this problem.
Pinching multi-sized wires for the purpose of making decisions
Is durable, and the part holding the wire is hard to break
A wire holder is provided.

[0012]

To achieve the above object, an electric wire holder according to the present invention has a base mounted on a support member and a pair of electric wire holding pieces protruding from an end face of the base. An electric wire holder having an electric wire insertion groove for elastically interposing an inserted electric wire between opposed inner wall surfaces of the electric wire holding piece, wherein a long hole is provided near the base of the pair of electric wire holding pieces. A first slit forming a thin electric wire holding wall is provided on the inner wall surface, and a second slit which is bent from an end of the first slit and extends substantially parallel to the long hole is provided, and the second slit is provided. A connecting thin portion was formed between the slit and the long hole. By providing the connecting thin portion, the weld line generated on the electric wire holding wall at the time of formation is moved away from the position where the electric wire is sandwiched, and the electric wire holding wall is hardly damaged.

By forming a thin portion between both ends of the elongated hole and both outer wall surfaces of the electric wire holding piece, the pair of electric wire holding pieces is easily bent and deformed, so that a large size Wire can be clamped. The base and the electric wire holding piece are integrally formed from a synthetic resin material by a mold, so that the base and the pair of electric wire holding pieces have an integral structure, and the structure is simplified.

In order to enhance the elastic holding force of the wire holding piece, a spring made of a rod-shaped spring material and biasing the wire insertion groove in the closing direction can be provided. The spring is formed of a rod-shaped spring material formed in a ring shape having an opening in a part thereof. When both ends of the opening are configured to be pressed against the outer wall surface of the electric wire holding piece, the internal stress of the spring is reduced. Since they are substantially uniformly dispersed, the durability of the spring is increased.

[0015]

The embodiment of the embodiment of the present invention will be described with reference to the drawings, FIG. 1 is a perspective view of a wire retainer C ₁ of the first embodiment of the present invention, FIG 2 is nipping the wire W it is a front view of the wire holder C ₁ showing the state. Incidentally, the conventional same parts and the wire holder A ₂ of a detailed description thereof will be omitted with the same reference numerals.

As shown in FIG. 1, a wire insertion groove 1 is provided between a pair of wire holding pieces 19, 19 projecting from the upper surface of the base 13.
5 is formed, and a long hole 2 extending toward both outer wall surfaces of the wire holding piece 19 is provided at a position near the base 13 of the wire holding piece 19.
0 is provided, and a thin portion 21 that facilitates bending deformation is formed between the long hole 20 and both outer wall surfaces of the wire holding piece 19.

A first slit 22a is formed in each wire holding piece 19.
And a second slit 22b formed in a more L-shape. The first slit 22a, similar to the slit 17 of the wire holder A _2, forms a thin wire holding wall 18 between the inner wall surface to the wire clamping piece 19, an end portion of the first slit 22a and the length A second slit 22b is provided extending from the end of the first slit 22a to be substantially parallel to the long hole 20.
A thin connecting portion 23 is formed between the first and second long holes 20.

The electric wire holder C constructed as described above
₁ is when the electric wire W is pushed into the electric wire insertion groove 15,
Since the thin-walled wire holding wall 18 and the connecting thin-walled portion 23 are electrically deformed, the insertion of the wire W is easy. . When inserting a wire W having a larger diameter,
The thin portion 21 is elastically deformed to facilitate insertion of the electric wire W.

Since the thin portion 21 has a larger elastic force than the thin wire holding wall 18 and the connecting thin portion 23, it hardly undergoes elastic deformation when the diameter of the wire W is small, but the diameter of the wire W increases. When the amount of elastic deformation of the electric wire holding wall 18 and the connecting thin portion 23 exceeds the elastic deformation amount, the electric wire sandwiching piece 19 undergoes elastic deformation spreading outward with the thin portion 21 as a fulcrum. The amount of elastic deformation of the wire holding piece 19 increases as the wire W increases, and the holding force also increases. Since the thin portion 21 is located outside the wire holding piece 19, the wire holding piece 19 is
Since the wire W is closed so as to wrap around the wire 1 as a fulcrum, it is difficult for the wire W to come off.

[0020] When integrally forming the wire holder C ₁ in a mold of a synthetic resin material, delay the flow of the molten resin material for connecting the thin portion 23 is thin, as shown in FIG. 2, the weld line L ₂ is wire The position becomes farther below the holding position of W, and since this position hardly elastically deforms, breakage of the connecting thin portion 23 is prevented.

[0021] Figure 3 is a perspective view of the wire holding portion C ₂ showing a second embodiment of the present invention, differs from the electric wire holder C ₁ of the first embodiment, the wire holding pieces 19 in the closing direction is that the spring 24 for biasing is provided, the others are the same as the wire holding portion C ₁ of the first embodiment. Since the spring 24 is formed from a rod-shaped spring material, damage is unlikely to occur even if stress is concentrated on the corner 24a. The locking groove 1 for fixing the spring 24 is provided outside the base 13 and the wire holding piece 19.
3a and 19a are provided.

[0022] Upon insertion of the wire W of the small-diameter to the wire holder C _2, thin wire holding wall 18, connecting the thin portion 23 is elastically deformed (see FIG. 4), exceeding the elastic deformation of the thin wire retainer 18 When the electric wire W having a size is inserted, the thin portion 21 is elastically deformed, and the electric wire holding piece 19 spreads against the urging force of the spring 24. Therefore, as the diameter of the electric wire W increases, the electric wire holding force increases. Since the wire holding piece 19 is reinforced by the spring 24, it is not damaged even when used for a long period of time.

FIG. 5, FIG. 6 is a perspective view and a front view showing a wire holder C ₃ of the third embodiment of the present invention, the spring 2
4 but replacing the spring 24 'of the ring shape is similar to the wire holder C _2. Spring 24 '
Is formed in a ring shape having an opening in a part thereof from a rod-shaped spring material, and the opening end is pressed against the wire holding piece 19. A substantially uniform internal stress is generated in the ring-shaped spring 24 ', and no localized concentrated stress is generated.
The service life is longer than that of No. 4.

[0024]

Since the present invention is configured as described above, it has the following effects. (1) Since the thin wire holding wall that is easily elastically deformed is provided on the inner surface side of the wire holding piece, the wire is easily inserted into the wire insertion groove, and the tip of the wire insertion groove does not spread. Therefore, there is an advantage that the electric wire does not fall off. (2) Thin portions are formed at both ends of the wire holding piece due to the long holes provided in the wire holding piece, and the wire holding piece works in the direction of closing the wire insertion groove with this thin portion as a fulcrum, so that the wire falls off. do not do.

(3) When the diameter of the wire is small, the wire is clamped by the elastic force of the wire holding wall, and even if the diameter of the wire exceeds the deformation amount of the wire holding wall, the thin portion is deformed. A large-diameter electric wire can be clamped. Also, there is an advantage that a small-diameter electric wire is clamped with a small force, and the clamping force increases as the diameter of the electric wire increases. (4) The connecting thin portion formed between the elongated hole and the second slit has an effect of keeping the weld line for holding and closing the electric wire away from the electric wire gripping position when the electric wire holder is formed. Is prevented from being damaged. (5) If the spring for urging the electric wire holding piece in the closing direction is made of a rod-shaped spring material, the life of the spring is increased. When this spring is formed in a ring shape having an opening in a part from a bar-shaped spring material, the internal stress of the spring is made uniform, and the life of the spring is further increased.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wire holder according to a first embodiment of the present invention.

FIG. 2 is a front view illustrating a state where an electric wire is inserted into the electric wire holder of FIG. 1;

FIG. 3 is a perspective view of a wire holder according to a second embodiment of the present invention.

FIG. 4 is a front view illustrating a state where an electric wire is inserted into the electric wire holder of FIG. 3;

FIG. 5 is a perspective view of a wire holder according to a third embodiment of the present invention.

FIG. 6 is a front view illustrating a state where an electric wire is inserted into the electric wire holder of FIG. 5;

FIG. 7 is a front view showing a conventional example of an electric wire holder.

FIG. 8 is a perspective view showing another conventional example of the wire holder.

FIG. 9 is a perspective view showing another conventional example of an electric wire holder.

FIG. 10 is a front view of a wire holder having a wire holding wall.

[Explanation of symbols]

B Supporting members C _{1 to} C ₃ Electric wire holder W Electric wire 13 Base 15 Electric wire insertion groove 18 Thin electric wire holding wall 19 Electric wire holding piece 20 Long hole 21 Thin portion 22 Slit 22a First slit 22b Second slit 23 Connection thin portion 24 , 24 'spring

Claims (5)

[Claims] 1. An electric wire having a base mounted on a support member and a pair of wire holding pieces protruding from an end face of the base, wherein an electric wire inserted between the opposed inner wall surfaces of the wire holding piece is elastic. An electric wire holding tool in which an electric wire insertion groove to be interposed is formed. An elongated hole is provided in the vicinity of the base of the pair of electric wire holding pieces, and a first slit is formed on the inner wall surface to form a thin electric wire holding wall. A second slit that is bent from an end of the first slit and extends substantially parallel to the long hole, and a thin connecting portion is formed between the second slit and the long hole. Holder. 2. The wire holder according to claim 1, wherein a thin portion is formed between both ends of the elongated hole and both outer wall surfaces of the wire holding piece. 3. The electric wire holder according to claim 1, wherein the base and the electric wire holding piece are integrally formed by molding from a synthetic resin material. 4. The electric wire holder according to claim 1, wherein a spring made of a rod-shaped spring material is provided to bias the electric wire insertion groove in a closing direction. 5. The spring is formed of a rod-shaped spring material formed in a ring shape having an opening in a part thereof, and both ends of the opening are pressed against the outer wall surface of the electric wire holding piece. An electric wire holder according to any one of claims 1 to 4.