JP3452158B2 - Wire connector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cut-through blade for electrical connection which, when electrically connecting a distribution line, does not remove the coating of the insulated wire and penetrates the insulating coating as it is to electrically connect with a conductor. The present invention relates to an electric wire connector used mainly for performing bypass construction or trial connection between lines having an electric wire diameter of 2.6 to 11.5 mm.

[0002]

2. Description of the Related Art Conventionally, when electrically connecting a distribution line, as a means for connecting with a conductor without stripping the coating, a cut-through blade is attached to a connector and the cut-through blade is pierced through the coating. There are means of contact with the conductors inside.

FIG. 6 and FIG. 7 show an example of an electric wire connector 20 using a conventional cut-through blade.
Has a substantially U-shaped cross section, has side walls 21a on both sides of the intermediate portion, has a hook-shaped wire holding portion 21b at the upper portion, has a protruding base portion 21c at the lower portion, and has a handle 22 at the protruding base portion 21c. The rod 23 is rotatably supported.

A blade retainer 24 having a connecting portion 24a for a connection terminal is attached to the front end of the screw rod 23. The blade retainer 24 is vertically rotated in the support 21 by both side walls 21a. It is slidably fitted. Also,
A mounting groove is formed in the center of the upper surface of the blade presser 24, and a cut-through blade 25 is attached to the mounting groove. The cut-through blade 25 is an L-shaped member fixed to the blade presser 24 with a wing nut 26. It is removably held by a holding metal fitting 27. A connecting terminal of a ground wire can be connected to the connecting portion 24a on the front surface of the blade presser by a bolt or the like.

Then, the cut-through blade 25 is connected to the electric wire 2.
When connecting to 8, the handle 22 is rotated clockwise to move the blade holder 24 upward, and the cut-through blade 25 attached to the upper surface is pierced into the electric wire 28 held by the electric wire holding portion 21b to insulate the electric wire 28. Make electrical contact with the conductor through the coating.

[0006]

In the electric wire connector 20 provided with the conventional cut-through blade for electric connection as described above, when the electric wire connector is detached from the electric wire and used next, the cut-through is performed. Although it is necessary to remove the blade 25 from the blade retainer 24 and replace it, the above-mentioned conventional wire connector 20
In this case, even when the blade retainer 24 is pulled down, the electric wire holding portion 21b is located above the blade retainer 24, and this hinders the removal of the cut-through blade 25, which is a problem.

Further, since the cut-through blade 25 is attached from the rear surface of the blade presser 24 with the wing nut 26 using the L-shaped holding metal fitting 27, the structure becomes complicated, and the cut-through blade 25 must be removed easily. Has the trouble of loosening the wing nut 26 and removing the L-shaped holding fitting 27.

The present invention has been made in view of the above conventional circumstances, and an object thereof is to temporarily hold a cut-through blade as a structure for temporarily holding it between the upper portion of the blade pressing case and the claw of the blade pressing case. An object of the present invention is to provide an electric wire connector that allows a cut-through blade to be connected to an electric wire simply, quickly and surely so that the electric wire is tightened at an intermediate position. Further, another object of the present invention is to provide an electric wire connector in which the cut-through blade can be replaced smoothly.

[0009]

In order to achieve the above object, the present invention as set forth in claim 1, is a tip of a vertically moving mechanism for vertically moving in a substantially U-shaped support body having a hook-shaped electric wire holding portion. In the electric wire connector equipped with a cut-through blade that is attached to the electric wire holding portion and penetrates the covering of the electric wire to be electrically connected to the conductor, the vertical movement mechanism is attached to the handle. A screw rod and a blade presser having a mounting portion for a cut-through blade on the upper surface which is supported by the tip of the screw rod, and the blade presser is raised inside the screw rod during the first step of raising the screw rod. Blade holding case that temporarily holds the cut-through blade placed on the blade part with its claws, and the second step of raising the screw rod causes the blade holder to hold the cut-through blade in the temporarily held state, the blade holding case, and the cut-through. Consists of a sleeve member that raises the blade Those were.

According to a second aspect of the present invention, the lower end of the blade presser case is fixed to the sleeve member, and the blade presser is attached to the claw side of the blade presser case between the sleeve member and the blade presser. In addition to interposing an urging elastic member, a step portion that can abut against the lower end of the sleeve member is formed in a part of the screw rod, and the sleeve member and the upper portion of the sleeve member The elastic member, the blade retainer, the cut-through blade, and the blade retainer case can all be raised. That is, in claim 2, the vertical movement mechanism is a blade retainer having a stepped portion attached to the handle, and a blade retainer supported by the tip of the screw rod and having a mounting portion for a cut-through blade on the upper surface. During the first step of raising the screw rod, the blade retainer is raised inside thereof, and a blade retainer case for temporarily holding the cut-through blade placed on the placing portion in its claw is provided, and the blade retainer is used as the blade retainer. The elastic member that urges the claw side of the pressing case, and the second step of raising the screw rod causes the step portion of the screw rod to come into contact, so that the cut-through blade remains in the temporary holding state, and the elastic member, It comprises a blade retainer, a blade retainer case, and a sleeve member for raising the cut-through blade. The sleeve member is fixed to the lower end of the blade pressing case, and the stepped portion of the sleeve member comes into contact with the lower end of the sleeve member when the screw rod is raised in the second step, so that the blade pressing case is pushed up together with the sleeve member. Is configured. At this time, the elastic member interposed between the sleeve member and the blade retainer slightly contracts to serve as a cushioning material, preventing bending of the claw for temporarily holding the cut-through blade at the upper portion of the blade retainer case.

[0011]

[Operation] Set the cut-through blade on the mounting part on the top of the blade retainer, cover the blade retainer case on it, and rotate the handle clockwise to raise the screw rod. The inside of the presser case rises, and the cut-through blade is temporarily held between the blade presser and the claw on the upper part of the blade presser case.

When the screw rod is further raised, the stepped portion formed on the screw rod as the second step abuts and presses the sleeve member, and the sleeve member, the blade retainer, and the blade are held while the cut-through blade is temporarily held. The presser case and the cut-through blade rise, and the cut-through blade pierces the electric wire. Then, the cut-through blade penetrates the insulating coating of the electric wire and is electrically connected to the conductor inside.

Next, at the time of dismounting, when the handle is rotated counterclockwise, the screw rod descends, and the cut-through blade is disengaged from the covered electric wire by performing the operation opposite to the above. At this time, there is resistance to take out the cut-through blade from the coating of the wire, but since the claw of the blade pressing case forcibly pushes the cut-through blade downward,
Easy to remove.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. 1 is an exploded perspective view of an embodiment of the present invention,
FIG. 2 is a front view of the same, and FIGS. 3 to 5 are sectional views of essential parts.

The electric wire connector 1 of the present invention, as shown in FIG. 1 and the like, uses a cut-through blade 2 to penetrate the insulation wire 3 to make a connection with the conductor 3a therein. Is provided with a hook-shaped wire holding portion 4a, side walls 4b are provided on both sides of the intermediate portion, and a protruding base portion 4c is provided at a lower portion, and a substantially U-shaped support body 4 formed on the protruding base portion 4c of the support body 4. A screw rod 6 with a handle 5 that is screwed into a small-diameter hole of the stepped through-hole 4d and supported so as to be vertically movable, and a blade retainer 8 attached to the tip of the screw rod 6 via a disc spring washer 7. The cut-through blade 2 mounted on the mounting groove (mounting portion) 8f between the two guide protrusions 8a and 8b on the upper surface of the blade retainer 8 and the protrusion of the blade 2 when the cut-through blade 2 is raised. And a cylindrical blade pressing case 9 having claws 9a for holding and temporarily holding the blade 9a. Cage, the lead wire L for use in short-circuit such as ground under side of the support 4 is a connection terminal (V) 10
It is a structure that can be attached by etc.

This wire connector 1 is assembled as shown in FIGS. 2 to 5, and when connecting the cut-through blade 2 to the insulated wire 3, the handle 5 is rotated clockwise to move the blade holder 8 upward. The cut-through blade 2 which is moved and attached to the upper surface is pierced into the insulated wire 3 held by the wire holding portion 4a,
A method of penetrating the insulating coating of the electric wire 3 and making electrical contact with the conductor 3a is adopted.

The support 4 is a substantially U-shaped, integrally-molded product, and the inside of the hook-shaped upper part is edged in a V-shape to form a wire holding portion 4a. As will be described later, the pipe 1 at the tip of the braided wire 11 connected to the blade retainer 8 for transmitting the conduction from the cut-through blade 2 is provided on the U-shaped side portion.
A screw hole for a bolt for connecting 2 is drilled, and the pipe 12 is attached through the screw. A bolt hole for connecting a lead wire is formed in the U-shaped lower-side inclined portion 4e, and a connecting terminal (bolt) 10 of the lead wire L is screwed to the lower terminal inclined portion 4e through a washer and a spring washer.

As described above, the projecting base portion 4c at the lower portion of the U-shaped support body 4 is provided with the two-stage through holes 4d (the upper stage has a large diameter hole, and the lower side has a small diameter screw hole) to form a small diameter. The screw rods 6 are supported in the screw holes at intervals so that the screw rods 6 can be moved up and down in the first and second steps. On the large hole side,
A sleeve-shaped sleeve member 14 serving as a cylindrical spring retainer having a hole through which the midway portion of the tip end side of the screw rod 6 is vertically movable is fitted in the bottom portion so as to be capable of a second-stage vertical movement.

The threaded rod 6 allows the narrow diameter portion 6b on the tip side to rotate the blade retainer 8 from both sides of the blade retainer 8 with two hexagon socket head bolts 15 and 15 and allows some play in the vertical direction. It is provided to prevent the head portion 6a at the tip of the narrow diameter portion 6b from coming off, so that when the screw rod 6 is raised or lowered, the blade holder 8 can be raised or lowered without rotating in conjunction with the screw rod 6. It is configured.

A small diameter portion 6c having a larger diameter is provided below the narrow diameter portion 6b of the screw rod 6, and a disc spring washer 7 is loosely fitted to the outer periphery of the small diameter portion 6c. The blade presser 8 is in contact with the lower large-diameter hole 8c step portion.

Below the small diameter portion 6c of the screw rod 6, there is a medium diameter portion 6d having a larger diameter, and a spring 17 is wound around the outer periphery thereof, and the spring 17 serves as the cylindrical spring retainer. Is disposed between the bottom portion 14b of the sleeve member 14 and the back surface of the disc spring washer 7. Therefore, the blade retainer 8 is urged upward by the spring 17 and the disc spring washer 7, especially when the screw rod 6 descends. Further, the spring 17 and the disc spring washer 7 are used for the second-stage screw rod 6
When it rises, it contracts slightly and acts as a cushioning material, and the cut-through blade 2 on the upper portion of the blade pressing case 9 temporarily holds the claw 9a.
Prevents bending.

Further, a large diameter portion 6e is further below the medium diameter portion 6d of the screw rod 6, and a screw is engraved on the outer circumference of the large diameter portion 6e. The step 6f at the boundary between the medium diameter portion 6d and the large diameter portion 6e abuts and presses against the bottom portion 14b of the sleeve member 14 which serves as a spring retainer, so that the second stage of vertical movement is possible.

The blade retainer 8 has a shape as shown in FIG. 1, and has two parallel guide ridges 8a on the flat portion of the upper surface.
8b is provided, and a mounting groove 8f serving as a mounting portion is formed between the guide protrusions 8a and 8b.
Are to be placed. Rectangular protrusions 8d and 8e are provided on both sides of the blade retainer 8, and one protrusion 8d is provided.
The pipe 18 at the other end of the braided wire 11 is screwed to (on the front side in FIG. 1), and the slide stopper 19 is screwed to the other protrusion 8e.

As shown in FIG. 1, the cut-through blade 2 has a U-shaped cross section made of a conductive material such as copper, has a linear base 2a long in the longitudinal direction, and two rows of needle-like protrusions. And a group of needle-shaped protrusion blades 2b provided at intervals. It is preferable that the cut-through blade 2 be integrally formed by press working or the like.

Both ends of the base 2a of the cut-through blade 2 are mounted in the mounting groove 8f on the upper surface of the blade presser 8 and then fixed by covering with the blade presser case 9 and then raised by the rotation of the screw rod 6. Thus, the upper jaws 9a, 9a of the blade pressing case 9 are configured to come into contact with the nails 9a, 9a in the first step and regulated. At this time, the temporary holding state is set. Then, by the upward movement of the screw rod 6 in the second stage, all the parts on the sleeve member 14 that serve as spring retainers, that is, the blade retainer 8, the cut-through blade 2, the blade retainer case 9 and the like rise together with the sleeve member 14. Then, the blade group 2b of the cut-through blade 2 is pierced into the coating of the electric wire 3 held by the electric wire holding portion 4a of the support body 4, so that the conductor 3a therein can be electrically connected.

The blade pressing case 9 is substantially cylindrical and has a shape as shown in FIG. 1. The inside of the blade pressing case 9 is guided by guide holes 9b, 9b provided on both side walls to cut the blade pressing case 8. The through blade 2 is interlocked so that it can be freely moved by the first step up and down movement. The blade pressing case 9 is positioned so that the projections 9c, 9c at the upper portions of both rear ends of the blade pressing case 9 are brought into contact with the side walls 4b, 4b of the support body 4 and sandwiched therebetween. It will serve as a guide when climbing and descending in the second stage. Further, a drill hole 9d is formed in the lower end portion of the blade pressing case 9, and the support 4
It is fixed to the head portion 14a of the sleeve member 14 fitted in by means of screws or the like. Therefore, the blade pressing case 9 and the sleeve member 14 to which the blade pressing case 9 is fixed are kept stationary during the first step of raising and lowering the cut-through blade 2 and the blade pressing member 8. The upper end of the guide hole 9b is
When the blade presser 8 is raised in the first step, the slide stopper 1 screwed to the protrusion 8e provided just on the side of the blade presser 1
By the contact of 9 with each other, the upper limit of the restriction is regulated.

Next, the operation of this embodiment thus constructed will be described with reference to FIGS. 3 to 5. When the cut-through blade penetrates the electric wire coating to connect to the conductor, first, the cut-through blade 2 is placed on the upper surface of the blade holder 8 and the mounting groove 8 is formed.
Set to f, cover the blade pressing case 9, and screw the blade pressing case 9 to the head portion 14a of the sleeve member 14 that serves as the spring pressing (see FIG. 3).

From the state shown in FIG. 3, when the handle 5 starts to rotate to the right, the screw rod 6 is raised in the first step, and the state shown in FIG. 4 is obtained. That is, the blade retainer 8 rises inside the blade retainer case 9 via the tip of the screw rod 6, and the cut-through blade 2 is placed between the upper surface of the blade retainer 8 and the claws 9a, 9a of the blade retainer case 9. It is sandwiched and temporarily held.

Further, when the handle 5 is rotated rightward,
While maintaining the temporary holding state, the screw rod 6 is raised in the second step, and finally the state shown in FIG. 5 is obtained. That is,
The sleeve member 14 abuts on the step 6f of the large diameter portion 6e of the screw rod 6, and as the screw rod 6 rises, parts (blade retainer 8, cut-through blade 2, blade retainer case 9, etc.) above the sleeve member 14 are removed. All are raised and the electric wire holding portion 4a of the support body 4
The cut-through blade 2 pierces the coating of the electric wire 3 supported by the. When it further rises, the cut-through blade 2 is connected to the conductor 3a inside the electric wire coating, and the electric wire 3 and the lead wire L connected to the connection terminal (bolt) 10 of the support body 4 are connected to the cut-through blade 2 and the blade presser 8. , The braided wire 11 and the support body 4 are electrically connected to perform the function of the electric wire connector 1.

At the time of removal, the handle 5 is rotated counterclockwise,
By lowering the screw rod 6, the above-mentioned reverse operation is performed. At this time, there is resistance in removing the cut-through blade 2 from the coating of the electric wire 3, but the claws 9a, 9a of the blade pressing case 9 have a resistance.
Forcibly pushes the cut-through blade 2 downward, so it can be easily removed.

In the present embodiment, for convenience of explanation, the raising of the screw rod is described as being divided into the first stage and the second stage, but in actuality, it is performed in a continuous operation. Further, it goes without saying that the stepped portion between the large diameter portion and the medium diameter portion shown in this embodiment corresponds to the step portion which can come into contact with the lower end of the sleeve member.

[0032]

Since the present invention is constructed as described above,
Hold the wire with the hook-shaped wire holding part on the upper part of the support, push up the cut-through blade attached to the tip of the blade presser with the handle, and pierce the held wire. Can be connected to each other. In other words, by pushing up the screw rod with the handle in the first step, the cut-through blade is temporarily held between the mounting part on the upper surface of the blade holder and the upper claw of the blade holder case, and the screw in the second step is held in the temporarily held state. When the rod is lifted, the cut-through blade is pierced into the wire held in the wire holding part to electrically connect with the conductor inside, so the cut-through blade can be connected to the wire easily, quickly and reliably. You can do it.

The replacement of the cut-through blades can be carried out easily and smoothly because it is only necessary to remove the blade presser case from the blade presser and remove the cut-through blades placed on the upper surface of the blade presser. Moreover, the present invention has a simpler structure than the conventional structure in which the cut-through blade is attached to the blade retainer via the holding metal fitting with the wing nut.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of a wire connector of the present invention.

FIG. 2 is a front view of an embodiment of the electric wire connector of the present invention.

FIG. 3 is a side sectional view of an essential part of the lowermost end of the embodiment of the electric wire connector of the present invention.

FIG. 4 is a side sectional view of an essential part showing a temporary holding state of an embodiment of the electric wire connector of the present invention.

FIG. 5 is a side sectional view of an essential part of the uppermost end of an embodiment of the electric wire connector of the present invention.

FIG. 6 is a side view of a conventional wire connector.

FIG. 7 is a side sectional view of a main part of a conventional wire connector.

[Explanation of symbols]

1 electric wire connector 2 cut-through blade 2a base 2b blade group 3 insulated wire 3a conductor 4 support 4a Wire holding part 4b side wall 4c protruding base 4d through hole 4e inclined part 5 handles 6 screw rod 6a head 6b narrow diameter part 6c Small diameter part 6d Medium diameter part 6e Large diameter part 6f step 7 Disc spring washers 8 blade holder 8a, 8b guide ridges 8c large hole 8d, 8e protrusion 8f mounting groove 9 blade holder case 9a nail 9b Guide hole 9c protrusion 9d drill hole 10 connection terminals 11 braided wire 12,18 pipe 14 Sleeve member 14a head 14b bottom 15 Hexagon socket head cap screw 17 spring 19 Slide stop L lead wire

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Flat 3-55661 (JP, U) Flat 57-124972 (JP, U) Flat 2-18277 (JP, U) Flat 53- 21380 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01R 4/24 H01R 11/14

Claims (2)

(57) [Claims] 1. A conductor that is attached to the tip of a vertical movement mechanism that moves up and down in a substantially U-shaped support body having a hook-shaped electric wire holding portion, and penetrates through the coating of the covered electric wire held by the electric wire holding portion. An electric wire connector provided with a cut-through blade electrically connected to a screw rod attached to a handle of the vertical movement mechanism, and a mounting portion of the cut-through blade supported on the tip of the screw rod on the upper surface. A blade retainer having, and a blade retainer case in which the blade retainer is raised therein while the first-stage screw rod is being raised, and the cut-through blade placed on the placing portion is temporarily held by the nail. An electric wire connector comprising: the blade retainer, the blade retainer case, and a sleeve member for raising the cut-through blade when the cut-through blade is raised in the temporary stage while being raised. 2. A lower end of a blade presser case is fixed to the sleeve member, and an elastic member for urging the blade presser to the claw side of the blade presser case is interposed between the sleeve member and the blade presser, and A step portion that can come into contact with the lower end of the sleeve member is formed on a part of the screw rod, and as the screw rod moves up in the second stage,
The electric wire connector according to claim 1, wherein the sleeve member, the elastic member above it, the blade retainer, the cut-through blade, and the blade retainer case can all be raised.