JPH0368612B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for assembling a reverse compression type retaining clamp that can pass through a metal wheel and is used for retaining an ACSR.

(Prior art and problems to be solved) The metal wheel passing type retaining clamp for ACSR consists of an aluminum clamp 1 and a steel clamp 2 as shown in Fig. 3.
It consists of a clamp body 3 (the bolt hole in the conventional one is not a long hole) and a jumper branch part 4 as shown in FIG. The clamp body 3 is formed into a straight cylindrical shape, and both sides of the connection part 5 that connects the jumper branch part 4 are parallel surfaces, and a protector is attached to the outer periphery so that it can pass through the groove of the wire rolling wheel. After the line, jumper branch part 4 is attached to the connection part 5.
is fitted and tightened with a plurality of tightening bolts 6. In this case, the bolt holes of aluminum clamp 1 and steel clamp 2 are provided before assembly.
After assembling the clamp main body 3, it is necessary that the centers of both bolt holes are aligned.

On the other hand, to assemble the clamp body 3, first
After compressing and connecting the steel core part 11 of ACSR10 to the steel clamp 2, cover the steel clamp 2 and the aluminum stranded wire part 12 with the aluminum clamp 1, and in the case of positive compression work, tighten the outer periphery of the aluminum clamp 1 from the steel clamp side. Compress sequentially toward the wire side (tip side). In such positive compression, the elongation of the stranded aluminum wire due to the compression of the aluminum clamp 1 is much larger than that of the steel core, so the aluminum wire bulges near the mouth of the aluminum clamp 1, which is what is called a wire laugh. .

In order to prevent the electric wire from collapsing, a so-called feed compression method is adopted in which the aluminum clamp 1 is compressed sequentially from the electric wire side toward the steel clamp side.

However, in such a reverse compression method, the aluminum clamp 1 is first fixed to the aluminum stranded wire section, and then is stretched toward the steel clamp side due to subsequent compression. Even if bolt holes are prepared in anticipation of movement and elongation, it is often difficult to align the center with the bolt hole of the steel clamp 2 using a conventional regular bolt hole. The problem arises that it cannot be inserted.

(Means for Solving the Problems) The present invention provides a method for assembling a metal wheel passing type reverse compression retention clamp that solves the above-mentioned problems. The aluminum clamp has multiple bolt holes for passing multiple tightening bolts, and the steel clamp has a common long hole for multiple tightening bolts. After compressing and connecting the parts, place an aluminum clamp over it, align the center lines of both bolt holes, and insert a long hole rotation prevention jig into at least one of the bolt holes of the aluminum clamp and the steel clamp. To prevent rotation, the aluminum clamp is sequentially compressed toward the steel clamp side and integrated.
After that, the rotation prevention jig is removed and the jumper branch is connected with bolts.

Figures 1 to 3 are diagrams showing the steps of assembling the clamp body according to the present invention in order of process. Figure 1 shows the steel clamp after compression, Figure A is a front view, Figure B is a side view, and Figure 2 is a diagram showing the steel clamp after compression. The figure shows the aluminum clamp before compression, Figure A is a front view, Figure B is a side view, and Figure 3 is a front view showing the clamp body after assembly. FIG. 4 is a side view showing the steel clamp rotation prevention jig shown in FIG. 2. FIG. 5 is a diagram showing a jumper branch used in the invention, where A is a front view, B is a side view, and C is a side view of a tightening bolt.

Next, a method of assembling a detention clamp according to the present invention will be described.

First, as shown in Figure 1, attach the steel clamp 2.
After the steel core 11 of the ACSR 10 is compressed and connected, the feeler gauge 9 is installed on the steel clamp collar 13 side.

Next, as shown in FIG. 2, the aluminum clamp 1 inserted into the ACSR 10 in advance is placed over the steel clamp 2 and pulled up to the feeler gauge 9.
A gap of an appropriate size is created between the steel clamp collar 13 surface and the end surface 14' of the aluminum clamp 1.
This gap is provided to prevent the aluminum clamp 1 from elongating due to compression from the wire side of the aluminum clamp 1 toward the steel clamp side (in the direction of the arrow) and colliding with the steel clamp flange 13. (If compressed further after the collision, the connecting part 5 of the jumper branch of the aluminum clamp 1 may be deformed or the clamp may be damaged.) When the aluminum clamp 1 is placed over the steel clamp 2, the bolt holes 8, The center lines of bolt holes 7 are aligned, but since bolt holes 7 are long holes, this work is easy.

Then, as shown in FIG. 2B, a jig 14 for preventing rotation of the steel clamp is inserted into at least one of the bolt holes 8 of the aluminum clamp 1 through which it can be inserted and the bolt hole 7 (elongated hole) of the steel clamp 2. , screw on both sides. The steel clamp rotation prevention jig 14 prevents the steel clamp 2 from rotating during subsequent compression, and prevents the centers of the bolt holes 7 and 8 from shifting and making it impossible to insert the jumper branch tightening bolt 6. It consists of two parts as shown in Figure 4, and is screwed from both sides. Note that instead of this, a rod having an outer diameter that fits into the bolt hole 8 may be used.

After compressing the wire side of the aluminum clamp 1 first, removing the feeler gauge 9 and sequentially compressing it toward the steel clamp side, the gap between the steel clamp flange 13 and the end surface 14' of the aluminum clamp 1 is almost reduced. There is a thud, but there is no collision.

After compression, the steel clamp rotation prevention jig 14 is removed to obtain a clamp body 3 as shown in FIG. The centers of the bolt holes 7 (elongated holes) are well aligned.

After the wire is extended, a fifth
When the jumper branch 4 as shown in the figure is fitted and the tightening bolt 6 is passed through the bolt holes 7 and 8, it can be passed through very easily, and the assembly of the retaining clamp is completed by tightening with a nut.

(Effects of the Invention) As described above, the assembly method of the present invention has the following effects.

In the clamp body of the metal wheel passing type reverse compression retention clamp as described above, the bolt hole of the steel clamp through which the plurality of tightening bolts for connecting the jumper branch portion is passed is formed of a long hole common to the plurality of bolts. Therefore, it is easy to align the center line of the bolt hole of the aluminum clamp before compression with the center line of the bolt hole (long hole) of the steel clamp, and by using an appropriate steel clamp prevention jig, it is possible to Even if the clamp extends toward the steel clamp and the bolt holes move, the center lines remain aligned, so the centers of both bolt holes can be aligned very easily after compression.

[Brief explanation of drawings]

Figures 1 to 3 are diagrams showing the steps of assembling the clamp body according to the present invention in order of process.
B shows the state after compression with steel clamps, A is a front view, B is a side view, and FIGS. 2A and B show before compression with aluminum clamps, A is a front view, and B is a side view. , FIG. 3 is a front view showing the clamp body after assembly. FIG. 4 is a side view showing the steel clamp rotation prevention jig shown in FIG. 2. Figures 5A, 5B and 5C are views showing the jumper branch used in the present invention, in which Figure A is a front view, Figure B is a side view, and Figure C is a side view of the tightening bolt. 1...Aluminum clamp, 2...Steel clamp, 3
...Clamp body, 4...Jumper branch, 5
... Connection part, 6 ... Tightening bolt, 7, 8 ... Bolt hole, 9 ... Feeler gauge, 10 ... Steel core aluminum stranded wire (ACSR), 11 ... Steel core part, 12
...Aluminum stranded wire part, 13...Steel clamp collar part,
14... Steel clamp rotation prevention jig.

Claims (1)

[Claims] 1 Consists of an aluminum clamp and a steel clamp that connect the jumper branch with bolts, the aluminum clamp has multiple bolt holes through which multiple tightening bolts are passed, and the steel clamp has a long hole common to multiple tightening bolts. After compressing and connecting the steel core of ACSR to the above steel clamp, place an aluminum clamp over it, align the center lines of both bolt holes, and connect at least one of the bolt holes of the aluminum clamp to the long hole of the steel clamp. A steel clamp rotation prevention jig is inserted to prevent the steel clamp from rotating, and the aluminum clamp is sequentially compressed and integrated toward the steel clamp side, after which the rotation prevention jig is removed and the jumper branch is removed. A method for assembling a metal wheel passing type reverse compression type retaining clamp characterized by bolt connection.