JPH0624128Y2 - Coated wire connector - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a covered electric wire connector, and in particular, it makes the cut-through blade suitable for single-use by reducing the cost and improves workability and maintenance management. The present invention relates to a covered electric wire connector that can eliminate the need for the above, and can prevent the conductor from being damaged or broken due to the piercing of the cut-through blade, and that the cut-through blade can be easily replaced.

[Conventional technology]

As a conventional covered electric wire connector, for example, Japanese Utility Model Publication No. 62
No. 26923 and Japanese Patent Laid-Open No. 64-57570.

The former is a pair of tightening plates with parallel grooves formed on both sides of the central part having a bolt insertion hole, and the parallel grooves of the tightening plates are detachably fitted and tightened respectively. It is configured to have a concave cut-through blade having a tip-saw-tooth-shaped protrusion protruding from the plate at both ends, and a bolt nut for tightening a pair of tightening plates.

In such a configuration, for example, a trunk line and a branch line are passed between the pair of tightening plates, the pair of tightening plates are tightened with bolts and nuts, and the ends of the cut-through blades protruding from the tightening plates have serrated protrusions at both ends. The portions are bitten into the conductors of the main line and the branch line at right angles to the longitudinal direction of the electric wire, and the main line and the branch line are electrically connected to divide the current of the main line into the branch line.

On the other hand, the latter is provided on the upper and lower main bodies that are openably and closably coupled by a hinge and clamps the wire by tightening bolts, and at least on the wire clamping surface of the lower body, and the wire coating is broken on the wire side. A conductor having a rod portion having a tooth portion that abuts the core wire, and a rod portion that has a ground metal engaging portion that protrudes through the lower body on the opposite side and has a ground wire locked at the end portion. There is.

In such a configuration, put an electric wire between the upper and lower body,
When the upper and lower main bodies are tightened and fixed, the tooth portion of the conductor breaks the coating of the electric wire and abuts the inner core wire to obtain an electrical connection with the electric wire. It is designed to conduct electricity.

[Problems to be solved by the device]

However, according to the conventional coated electric wire connector, since the cut-through blade is formed by subjecting the metal having the predetermined cross-sectional area (thickness) to the predetermined processing, the unit price of the cut-through blade increases, Since it cannot be used as a disposable item, it must be stored and managed for each size for replacement.

Further, each has the following problems.

(1) Japanese Utility Model Publication No. 62-26923 Since the projecting portion having a saw-toothed tip bites at a right angle to the core wire, the core wire may be damaged or, in the worst case, broken. Moreover, since the two electric wires are connected using the cut-through blade as a current path, a predetermined cross-sectional area (wall thickness) is required, which causes a cost increase as described above.

(2) Japanese Unexamined Patent Publication No. 64-57570 Since the conductor in which the tooth portion and the rod are integrally formed is assembled and integrated with the lower body and the grounding metal engaging portion, the number of teeth can be changed according to the size and type of the electric wire to be pierced When exchanging the tooth portion such as changing it, there is an inconvenience that it is necessary to exchange each tool (connector).

Therefore, an object of the present invention is to provide a covered electric wire connector that can be made disposable by reducing the cost of the cut-through blade, improve the workability, and make storage and management unnecessary. is there.

Another object of the present invention is to provide a connector for a covered electric wire which can prevent damage or disconnection of a conductor due to piercing of a cut-through blade.

Still another object of the present invention is to provide a covered electric wire connector capable of removing a cut-through blade that has become unusable and easily mounting a new cut-through blade.

[Means for Solving the Problems]

In view of the above problems, the present invention reduces the cost of the cut-through blade, makes it suitable for single use, improves workability, and eliminates the need for storage and management. In order to prevent the conductor from being damaged or broken due to piercing, and to remove the cut-through blade that is no longer usable and to easily install a new cut-through blade, a receiving die with a groove for receiving the covered wire is provided. A holding metal fitting having a groove for accommodating the covered electric wire and a recess for positioning a cut-through blade having a predetermined length along the length direction of the covered electric wire in the groove, and a connecting metal fitting connected to the holding metal fitting The cut-through blade is positioned in the recess of the holding metal fitting and moved toward the receiving die to receive the covered metal wire. The cut-through blade has a structure in which the cut-through blade is pressed from the back by a metal fitting to connect the cut-through blade to the conductor by penetrating the insulation of the covered electric wire. And a plurality of blade groups having a plurality of protrusions protruding from the base portion, a plurality of blade groups are formed intermittently with a predetermined distance in the length direction of the base portion and the plurality of It has a structure in which the protrusions are aligned in the length direction of the wire,
For a covered electric wire in which when a plurality of blade groups are connected to the conductor of the covered electric wire, the interface between the conductor and the cut-through blade and the recess of the holding metal fitting, the current path through the holding metal fitting and the connecting metal fitting is configured. It provides a connector.

The cut-through blade can be fixed, for example, by locating the cut-through blade in the recess of the holding metal fitting and locking the base portion with the claws of the blade holder screwed on both sides of the holding metal fitting.

〔Example〕

Hereinafter, the covered wire connector of the present invention will be described in detail with reference to the accompanying drawings.

1 (a) and 1 (b) are cut-through blades 1 applied to the present invention.
Indicates 0. A plurality of cut-through blades 10 having a substantially U-shaped cross section are arranged at a predetermined interval P at both ends (longitudinal direction) of a plate-shaped base 11 made of copper (3 in this embodiment).
The blade group 13 having the projections 12) is integrally formed with the base portion 11, and an intermittent portion 18 having a predetermined distance 1 is formed between the blade groups 13. This cut-through blade 10 is the second
As shown in the figure, such a shape can be obtained by bending the plurality of protrusions 12 formed on both sides (short side direction) of the base portion 11 at the fold line (dotted line) portion.

3 (a) and 3 (b) show an embodiment of the present invention, in which the grip portion 9
A rod 9a having a rod is slidably supported by a support body 2, a press fitting 1 having a connecting portion 4 is fixed to the tip of the rod 9a, and a cut-through blade 10 is provided in a groove 1a of the press fitting 1. Has been. As will be described later, the cut-through blade 10 is detachably fixed to the holding metal fitting 1 by a blade holder 7 fixed via a bolt 8. Connection part 4
For example, the connection terminal 5 of the ground wire 17 can be connected via the bolt 6. Engagement groove 3A on the support 2
Is formed, and the receiving die 3 can be attached to and detached from the engaging groove 3A in the direction perpendicular to the paper surface (FIG. 3 (b)). That is, the expansion spring 19 provided on the support body 2 urges the ball body 20, and when the receiving die 3 is inserted into the engagement groove 3A, the urged ball body 20 is formed on the receiving die 3. It is adapted to engage a hole (not shown). A groove 3a is formed in the receiving die 3, and the groove 3a is formed by
Rotate a in the direction of the arrow to receive the holding metal fitting 1 and the receiving die 3
The conductor 16 and the coated electric wire 14 having the insulating coating 15 can be held by cooperating with the groove 1a of the holding metal fitting 1 by abutting on the cut-through blade provided in the holding metal fitting 1. 10 can be pierced to the conductor 16 of the covered electric wire 14. By the piercing of the cut-through blade 10, the covered electric wire 14 and the ground wire 17 are electrically connected to each other via the metal fitting 1, and the covered electric wire 14 can be grounded.

FIG. 4 shows a method of fixing the cut-through blade 10 in the groove 1a of the holding metal fitting 1. The cut-through blade 10 is arranged in the recess 1b formed in the groove 1a, and in this state, the claw 7b of the blade holder 7 is provided.
Are arranged on both sides of the press fitting 1 so as to be locked on the base portion 11 of the cut-through blade 10. After that, the bolt 8 is inserted into the bolt hole 1c of the press fitting 1 through the washer 8a and the insertion hole 7a of the blade holder 7, so that the claw 7b of the blade holder 7 clamps the cut-through blade 10. The cut-through blade 10 can be fixed to the holding metal fitting 1 by.

In the above configuration, when the grip portion 9 is rotated and the rod 9a is rotationally moved in the direction of the arrow, the holding metal fitting 1 provided at the tip of the rod 9a abuts the receiving die 3, and the holding metal fitting 1 and the receiving die are provided. A cut-through blade that holds the covered electric wire 14 by means of 3 and is fixed in the groove 1a of the holding metal fitting 1.
The blade group 13 of 10 breaks through the insulating coating 15 and each projection 12 penetrates to the conductor 16. At this time, since the intermittent portion 18 having a predetermined distance 1 is formed between the plurality of blade groups 13, the length of the base portion 11 becomes longer than that of the conventional one, but the compressive force received by the base portion 11 is thereby increased. In addition, since the blade group 13 has an intermittent portion 18, it can be easily covered with a small pressure.
You can pierce 14. Further, since the cut-through blade 10 is detachable, it can be easily replaced even if the protrusion 12 is damaged. Therefore, copper having relatively low mechanical strength can be used. As a result, the cut-through blade 10 can obtain good conductivity.

5 (a) and 5 (b) show another cut-through blade 10 applied to the present invention, which is a portion surrounded by the base portion 11 and the blade group 13, that is,
The compound enclosure 21 is disposed inside the "U" shape. As shown in FIG. 6, the compound enclosure 21 is, for example, white or the like (preferably a color opposite to the insulating coating).
The compound 22 mixed with the color pigment is sealed by a thin film bag 23 such as an aluminum sheet, and the thin film bag 23 is easily broken by a predetermined compression force, for example, the piercing force of the cut-through blade 10. There is.

In the above structure, when the cut-through blade 10 is pierced into the covered electric wire 14 as shown in FIG. 7, the thin film bag 23 of the compound enclosure 21 is ruptured by the compressive force due to the piercing and the colored compound 22 inside flows out. To do. The compound 22 penetrates into the through holes 24 formed in the insulating cover 15 by the piercing of the cut-through blade 10, and the respective protrusions
It penetrates into the gap formed between 12. Therefore, a gap is not formed in the through hole, rainwater and the like can be prevented from entering, and the protrusions 12 and the conductor 16 can be prevented from rusting. Further, when the cut-through blade 10 is detached from the covered electric wire 14, as shown in FIG.
Since 24 or the vicinity thereof is colored white or the like, the hole residue of the through hole 24 can be displayed on the outer periphery of the covered electric wire 14, and the maintenance worker can easily find the hole residue. .

Although the cut-through blade described above has been described as being grounded, the invention is not limited to this and may be connected to an arrester terminal, a fuse terminal, or the like.

[Effect of device]

As described above, according to the connector for a covered electric wire of the present invention, the receiving die having the groove for receiving the covered electric wire, the groove for housing the covered electric wire, and the groove having a predetermined length along the length direction of the covered electric wire Consists of a press fitting having a recess for locating the cut-through blade and a connecting fitting connected to the press fitting, and the cut-through blade is positioned in the recess of the press fitting to move the press fitting toward the die. With this structure, the coated wire is sandwiched between the groove of the die and the groove of the holding metal fitting, and the cut-through blade is pushed from the back by the holding metal fitting to connect the cut-through blade to the conductor by penetrating the insulator of the coated wire. And the cut-through blade has
It is composed of a plate-shaped base made of a conductive material and a plurality of blade groups having a plurality of protrusions protruding from the base, and the plurality of blade groups are formed intermittently while having a predetermined distance in the length direction of the base. And the plurality of protrusions are arranged in the length direction of the electric wire, and when a plurality of blade groups are connected to the conductor of the covered electric wire, the cut-through blade from the conductor and the recess of the holding metal fitting are Since the current path that passes through the interface contact part, the holding metal fittings, and the connecting metal fittings is configured, the cost of the cut-through blade is reduced, making it suitable for disposable use, improving workability and eliminating the need for maintenance management. In addition, the conductor can be prevented from being damaged or broken due to the piercing of the cut-through blade, and the cut-through blade can be easily replaced.

[Brief description of drawings]

1 (a) and 1 (b) are explanatory views showing an embodiment of the present invention, and FIG.
Fig. 3 is an explanatory view showing the cut-through blade before processing, Fig. 3
(a), (b) is an explanatory view showing a compression tool using a cut-through blade, Fig. 4 is an exploded perspective view showing a method of fixing the cut-through blade to the press fitting, and Fig. 5 (a), (b). ) Is an explanatory view showing a second embodiment of the present invention, FIG. 6 is an explanatory view showing a compound enclosure, FIG. 7 is an explanatory view showing a state in which a cut-through blade is pierced into a covered electric wire, and FIG. 8 is Explanatory drawing showing the through holes remaining in the covered electric wire, explanation of reference numerals 1 ... Press fitting, 1a ... Groove 1b ... Recess, 1c ... Bolt hole 2 ... Supporting body, 3 ... Receiving die 3a ... Groove, 3A ... engagement groove 4 ... connecting part, 5 ... connection terminal 6 ... bolt, 7 ... blade holder 7a ... insertion groove, 7b ... claw 8 ... bolt 8a ... washer, 9 ... grip Part 9a …… Rod 10 …… Cut-through blade 11 …… Base, 12 …… Protrusion 13 …… Blade group, 14 …… Coated electric wire 15 …… Insulation coating, 16… Conductor 17 ...... ground line, 18 ...... intermediate region 19 ...... extension spring, 20 ...... ball 21 ...... compound inclusions 22 ...... compound, 23 ...... film bag 24 ...... through hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-64-57570 (JP, A) Actual opening 48-105070 (JP, U) Actual opening Sho 53-21380 (JP, U) Actual opening 52- 5818 (JP, Y2) Actual public Sho 62-26923 (JP, Y2)

Claims (3)

[Scope of utility model registration request] 1. A receiving die 3 having a groove 3a for receiving the covered electric wire 14, a groove 1a for accommodating the covered electric wire 14, and a predetermined length in the groove 1a along the length direction of the covered electric wire 14. The cut-through blade 10 includes a press fitting 1 having a recess 1b for locating the cut-through blade 10 and a connecting fitting 4 connected to the press-fitting metal 1. The cut-through blade 10 is provided in the recess 1b of the press fitting 1.
Position, and by moving the pressing metal fitting 1 toward the receiving die 3, the covered electric wire 14 is sandwiched between the groove 3a of the receiving die 3 and the groove 1a of the pressing metal fitting 1, and the cut-through is performed. The blade 10 is pushed from the back by the holding metal fitting 1 to connect the cut-through blade 10 to the conductor 16 by penetrating the insulator 15 of the covered electric wire 14, and the cut-through blade 10 is made of a conductive material. A plate-shaped base 11
And a plurality of blade groups 13 having a plurality of protrusions 12 protruding from the base portion 11, the plurality of blade groups 13 being the base portion.
11 has a configuration in which the plurality of projections 12 are formed intermittently while having a predetermined distance in the length direction of 11 and are arranged in the length direction of the electric wire 14, and the plurality of blade groups 13 are When connected to the conductor 16 of the covered electric wire 14, a current passage is formed from the conductor 16 through the interface contact portion between the cut-through blade 10 and the recess 1b of the holding metal fitting 1, the holding metal fitting 1 and the connecting metal fitting 4. A covered electric wire connector comprising: 2. The predetermined conductive material is copper.
Connector for covered electric wire in the item. 3. The coated electric wire according to claim 1, wherein the cut-through blade 10 is provided with a compound enclosure for enclosing the colored compound on the base 11 and allowing the compound to flow out by a predetermined compression force. Connector.