JPH0412734Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a tool for attaching and detaching a branch connector, and relates to a tool used when connecting a branch connector to a main line and a branch line of an overhead electric line.

(Prior art and problems) The above branch connector has two wire insertion holes for holding the wires, and after inserting the main wire and the branch wire into each wire insertion hole, both wires are connected by tightening the bolts. This is for connecting and fixing.

Normally, when attaching and detaching the branch connector to and from the wires, multiple workers are required to grasp the branch connector, insert each wire into the wire insertion hole and hold it, and rotate the bolt. Work such as manually tightening and fixing each wire was divided among the workers, and the work was done manually one by one.

In recent years, there has been a demand for live wire work in various electrical works.
There is also a demand for the development of a tool for indirect live wires that can perform the above-mentioned work procedures simply by operating the insulated operating rod on the hand side of the above-mentioned branch connector attachment/detachment work.

However, the procedure for attaching and detaching the branch connector is complicated and troublesome. In particular, if the wire inserted into the wire insertion hole is not securely held and the connection is not made by tightening the bolt, a connection failure may occur. It has been difficult to develop tools for live wires that do not involve manual labor, as there are problems in which the wires may fall off or fall off.

(Means for Solving the Problems) Therefore, the object of this invention is to provide an attachment/detachment tool that allows the above-mentioned branch connector attachment/detachment work to be performed as an indirect live wire operation using an insulated operating rod.

In order to achieve the above object, the structure of this invention is such that the branch connector can be held between the tool body and the clamping piece that can move forward and backward, thereby ensuring that the branch connector is held securely. This makes it possible to attach and detach the wires.

A wire holding mechanism is provided at each location corresponding to the two wire insertion ports of the branch connector.
The wire inserted into the wire insertion port of the branch connector can be securely fixed and held.

As for the wire holding mechanism, the rear end of the wire holding piece is pivotably supported on a pushing body, and the pushing body is movable along the longitudinal direction of the wire holding piece and is threadedly engaged with a screw shaft. By rotating the shaft, the pushing body is moved forward and backward, and the wire holding piece pivotally supported on the pushing body is actuated.

A sliding groove is formed in the longitudinal direction on the side of the shaft fulcrum of the wire holding piece, and a guide roller that is pivotally supported on the tool body is slidably inserted into the sliding groove, so that the pushing body moves forward and backward. Due to the accompanying cam action between the sliding groove and the guide roller, the wire holding piece pivots from the side of the branch connector to the wire insertion opening, and further presses and fixes the wire to the branch connector.

By providing an operation shaft that can selectively rotate the screw shafts of the two sets of wire holding mechanisms described above, the two sets of wire holding mechanisms can be operated independently and separately. There is.

(Example) Next, an example of this invention will be illustrated below with reference to the drawings.

1 and 2 show the overall structure of the tool.

Reference numeral 1 denotes a tool body, which holds the lower half C1 of the branch connector C by sandwiching it between a fixed clamping part 10 and a movable clamping piece 11. The movable clamping piece 11 is connected to a screw shaft 12, and the screw shaft 12 is connected to the fixing nut 1 of the tool body 1.
3 is screwed together. Therefore, as shown in detail in FIG. 3, by rotating the screw shaft 12, the screw shaft 12 and the movable clamping piece 11 move back and forth to clamp the lower half C1 of the branch connector C. 14
is a fitting head of the operating rod, and is formed so that an insulated operating rod R with a fitting nut can be inserted thereinto. 15 is an adjustment double nut for adjusting the insertion depth of the insulated operating rod R.

Next, 2 of the branch connector C attached to the tool body 1
Wire holding mechanisms 2 are provided at upper and lower positions corresponding to the wire insertion holes h1 and h2 of the book, respectively.

In the wire holding mechanism 2, 20 is a wire holding piece, which is made of a plate-shaped piece bent in an L-shape.The bent end side 21 is arranged adjacent to the wire insertion holes h1 and h2, and the electric wire is inserted through this tip side 21. By moving the electric wire W from the openings h1 and h2 toward the lower half C1 side of the branch connector C, the electric wire W is pressed and fixed. In addition,
As shown in FIG. 2, the wire holding pieces 20 are symmetrically provided at positions corresponding to the front and back sides of the branch connector C.

The rear end of the wire holding piece 20 in the longitudinal direction is a link 22
The link 22 is connected to a movable nut 23. This link 22 and movable nut 23 serve as a pushing body that operates the wire holding piece 20. The movable nut 23 is adapted to slide in the longitudinal direction of the wire holding piece 20 while contacting the tool body 1.

The movable nut 23 is screwed onto the screw shaft 24,
A bevel gear 25 is provided on the screw shaft 24, and by rotating the bevel gear 25 and the screw shaft 24, the movable nut 23 moves forward and backward.

A longitudinal sliding groove 26 is formed in the wire holding piece 20 on the side of the pivot point 28 with respect to the link 22 . Reference numeral 27 denotes a guide roller rotatably supported by the tool body 1, and this guide roller 27 is slidably inserted into the sliding groove 26.

Due to the cam action of the guide roller 27 and the sliding groove 26, the wire holding piece 20 moves in the longitudinal direction and rotates. That is, as shown in FIG. 4, the pivot point 28 between the wire holding piece 20 and the link 22
When the screw shaft 24 is rotated to move the movable nut 23 and the link 22 back and forth, the wire holding piece 20 also moves linearly in the longitudinal direction, and the wire is inserted into the wire insertion opening 27. Push the electric wire W against the branch connector C and fix it.

However, as shown in FIG. 4, when the shaft fulcrum 28 of the wire holding piece 20 and the link 22 moves forward beyond the guide roller 27, the wire holding piece is moved by the cam action of the sliding groove 26 and the guide roller 27. 20 turns around the pivot point 28. This pivoting action allows the wire holding piece 20 to be withdrawn from the wire insertion grooves h1, h2 of the branch connector C to the side of the branch connector C.

Next, an operating mechanism 3 is provided perpendicularly to the axial direction of the wire holding mechanism 2, and 30 is a bevel gear.
1, and the operating shaft 31 is connected to the insulated operating rod 32.
is inserted into the inside of the rotary operating member, and is connected to a rotation operating member as appropriate, so that the operating shaft 31 can be rotated, and at the same time,
The operating shaft 31 is configured to be able to move up and down in the axial direction.

Therefore, when the operating shaft 31 is moved upward and the bevel gear 30 is engaged with the bevel gear 25 of the upper wire holding mechanism 2, the rotation of the operating shaft 31 causes
The upper wire holding mechanism 2 can be operated. Conversely, when the operating shaft 31 is moved downward and the bevel gear 30 is engaged with the bevel gear 25 of the lower wire holding mechanism 2,
By rotating the operating shaft 31, the lower wire holding mechanism 2 can be operated.

That is, the upper and lower wire holding mechanisms 2 can be independently and selectively operated.

A method of using the branch connector attachment/detachment tool described above will be explained.

First, when installing the branch connector C, the lower half C1 of the branch connector C is clamped by the operation of the movable clamping piece 11, and the branch connector C is held in the tool body 1.

Next, holding the insulated operating rod 32, bring the tool body 1 and the branch connector C closer to the installation location. At this time, the upper and lower wire holding pieces 20 turn upward or downward, and the wire insertion holes h1, h of the branch connector C are
2 [state shown in Figure 4].

Of the two wires connected by branch connector C,
The electric wire W on one side is inserted from the side of the branch connector C into the electric wire insertion hole h1 or h2 on one side.

Then, activate the wire holding mechanism 2 on the adjacent side,
After rotating the wire holding piece 20 and placing it above the electric wire W, move it straight and use the wire holding piece 20 to hold the electric wire W.
Press it against the branch connector C and fix it.

In this way, after holding the electric wire W on one side fixedly,
The wire W on the opposite side is fixedly held in the wire insertion hole h2 on the opposite side of the branch connector C by operating the lower wire holding mechanism 2 in the same manner as described above.

Next, if the tightening bolt b of the branch connector C is rotated and tightened with the operating rod as appropriate, the two electric wires W,
W is connected and fixed to branch connector C. after that,
The upper and lower wire holding pieces 20 are moved linearly to release the pressing and fixing of the wire W, and are further rotated to exit the wire holding pieces 20 from the wire insertion holes h1 and h2, and then the movable clamping piece 11 is moved downward. If the clamping of the branch connector C is released, the attachment/detachment tool can be detached from the electric wire W and the branch connector C.

Next, when removing the branch connector C from the wire W, the branch connector C in the overhead power line is clamped and fixed between the movable clamping piece 11 and the fixed clamping part 10 of the tool body 1, and the wire holding mechanism 2 After fixing the electric wire W, loosen the tightening bolt b.

After that, release the upper and lower wire holding mechanisms 2, 2 one by one, and remove the two wires W, W in sequence.
The branch connector C and the electric wires W, W may be separated, and the branch connector C may be recovered while being held between the tool body 1.

Among the attachment/detachment tools for the branch connector C described above, the operating mechanism of the movable clamping piece 11 is not only the illustrated structure of the screw shaft 12 and the fixing nut 13, but also a known gear or cam mechanism. It is also possible to change to one that is operated elastically by a spring.

The wire holding piece 20 may have an arc shape, a hook shape, or the like, which is suitable for pressing and fixing the wire W, in addition to the L-shape shown in the figure.

Further, depending on the shape and arrangement of the guide roller 27 and the sliding groove 26, the movement stroke of the wire holding piece 20 can be set freely, and the wire holding piece 20 can be freely set so as not to interfere with the work of connecting the electric wire W to the branch connector C. The structure shown is not limited to the structure shown, as long as the piece 20 can be actuated.

As a mechanism for selectively rotating the upper and lower screw shafts 24, 24, as shown in the figure, bevel gears 30, 30 are provided on an operation shaft 31 that can be moved up and down, and bevel gears 30, 30 are provided on the upper and lower screw shafts 24, 24. In addition to the structure that meshes with either of the gears 25, 25, a combination of known gear switching mechanisms, cams, clutch mechanisms, etc.
It is also possible to implement a method in which the screw shafts 24, 24 are selectively rotated.

Note that the branch connector C to which the attachment/detachment tool of this invention is applied is not limited to the shape or structure shown in the drawings, but can also be used to connect two electric wires W to the upper and lower halves C1 and C.
It can also be freely applied to various ordinary branch connectors that are connected and fixed by tightening with 2.

(Effects) According to the branch connector attachment/detachment tool of this invention configured as described above, the branch connector C can be securely held by the operation of the clamping piece 11, and the two electric wire insertion holes h1 and h2 can be held securely. are wire holding mechanisms 2 and 2, respectively.
Since the wire holding mechanisms 2, 2 can be operated independently and selectively, the two wires W, W can be reliably attached and detached from one side at a time.

In particular, as the wire holding mechanism 2, the wire holding piece 2
A link 22 and a movable nut 2 that pivotally support 28
3 is moved forward and backward by the rotation of a screw shaft 24 screwed into a movable nut 23,
The wire holding piece 20 can be pivoted by the cam action of the sliding groove 26 and the guide roller 27,
In addition to pressing and fixing the wire W with the wire holding piece 20, when inserting the wire W into the branch connector C, the wire holding piece 20 can be moved to a position where it does not interfere with the work, and the wire W is The attachment/detachment work is extremely easy and can be accomplished reliably.

Therefore, as an attachment/detachment tool, it is possible to make the attachment/detachment of branch connectors into live wire work, which was difficult in the past.
It has excellent practical value.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing an embodiment of the attachment/detachment tool of this invention, Fig. 2 is a top view, Fig. 3 is a schematic structural diagram of the clamping part of the branch connector, and Fig. 4 is the operation of the wire holding mechanism. It is a schematic structure diagram showing a state. 1... Tool body, 11... Movable clamping piece, 2...
Wire holding mechanism, 20... Wire holding piece, 22... Link, 23... Movable nut, 24... Screw shaft, 2
5...Bevel gear, 26...Sliding groove, 27...Guide roller, 28...Shaft fulcrum, 30...Bevel gear,
31...Operation axis, C...Branch connector, h1, h
2...Electric wire insertion port, W...Electric wire.

Claims (1)

[Scope of utility model registration request] The branch connector can be held between the tool body and the movable holding piece, and a wire holding mechanism is provided at each location corresponding to the two wire insertion holes of the branch connector. teeth,
The rear end of the wire holding piece is rotatably supported on the pushing body,
The pushing body is movable along the longitudinal direction of the wire holding piece and is screwed onto the screw shaft, so that the pushing body can be moved forward and backward by rotation of the screw shaft, and is moved to the side of the pivot point of the wire holding piece. A sliding groove is formed in the longitudinal direction, and a guide roller, which is pivotally supported on the tool body, is slidably inserted into the sliding groove, and the screw shafts of the two sets of wire holding mechanisms are selectively rotated. A branch connector attachment/detachment tool characterized by being equipped with a control axis.