JPH01315214A - Assembling method of snatch block passage type reverse compression anchor clamp - Google Patents

Abstract

PURPOSE:To easily align the center line of the bolthole of an aluminum clamp and the center line of the bolthole of a steel clamp by composing the bolthole of the steel clamp, through which a plurality of clamping bolts for connecting jumper branch sections are passed, out of a plurality of slots in common in the bolts. CONSTITUTION:The steel core section 11 of an ACSR 10 is pressure-connected to a steel clamp 2 first, and a clearance gage 9 is installed on the steel clamp collar section 13 side. The steel clamp 2 is covered with an aluminum clamp 1 previously inserted into the ACSR 10, and the aluminum clamp 1 is drawn near the clearance gage 9. A jig for preventing the revolution of the steel clamp is inserted into at least one capable of being inserted in the boltholes of the aluminum clamp 1 and the bolthole 7 (a slot) of the steel clamp 2, and both sides of the jig are screwed. The wire side of the aluminum clamp 1 is compressed first, the clearance gage 9 is removed, and the aluminum clamp 1 is compressed successively toward the steel clamp side.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) 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) A metal wheel passing type, retaining clamp for ACSR is as shown in Fig. 3.
It consists of a clamp body 3 consisting of an aluminum clamp 1, a steel clamp 2 (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 No. 3 is formed into a straight cylindrical shape, and both sides of the connecting part 5 that connects the jumper branch part 4 are made 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 wire is extended, the jumper branch part 4 is fitted into the connection part 5, and the plurality of bolts are tightened with bolts 6. In this case, the bolt holes of the aluminum clamp 1 and the steel clamp 2 are provided before assembly, and after the clamp body 3 is assembled, the centers of the bolt holes of both must be aligned.

On the other hand, to assemble the clamp body 3, first use the AC5RI
After compressing and connecting the clear center part I+ of O 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,
Compress sequentially from the steel clamp side to 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 this electric wire from collapsing, a so-called reverse 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 this type of reverse compression method, the aluminum clamp 1 is first fixed to the aluminum stranded wire part, and then compressed to extend toward the steel clamp side. Even if bolt holes are prepared in anticipation of hole movement and elongation, it is often difficult to align the center with the bolt hole of the steel clamp 2 with a conventional regular bolt hole, and the tightening described above is difficult. A pressure arises that prevents the bolt from being inserted.

(Means for Solving the Problems) The present invention provides a method for assembling a metal wheel passing type reverse compression detention clamp that solves the above-mentioned problems, and its features are as follows:
It consists of an aluminum clamp and a steel clamp that connect the jumper branch with bolts.The aluminum clamp has multiple bolt holes for passing multiple bolts, and the steel clamp has multiple bolt holes for passing multiple bolts. After compressing and connecting the steel core of the ACSR to the above-mentioned steel clamp, place an aluminum clamp over it and align the center lines of both bolt holes, so that at least one of the bolt holes of the aluminum clamp and the steel clamp A steel clamp rotation prevention jig is inserted into the elongated hole to prevent the steel clamp from rotating, and the aluminum clamps are sequentially compressed toward the steel clamp to integrate them, and then the rotation prevention jig is removed and the jumper is inserted. The purpose is to connect the branches 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, and Figure (B) is a side view. can be,
Figure 2 shows the aluminum clamp before compression, Figure (A) is a front view, Figure (0) is a side view, and Figure 3 is a front view of 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, in which (a) is a front view, (0) is a side view, and (c) is a side view of the 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 AC3R10 to the steel clamp 2.
After the steel core If is compressed and connected, the feeler gauge 9 is installed on the steel clamp part 13 side.

Next, as shown in Fig. 2, cover the aluminum clamp 1, which has been inserted into the AC3R10 in advance, over the steel clamp 2.
When pulled up to the feeler gauge 9, the steel clamp collar 1
A gap of an appropriate size is created between the three surfaces 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 connection 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. Align the center lines of bolt holes 7 and 7, but since the bolt holes 7 are long holes, this work is easy.

Then, as shown in FIG. 2 (b), insert the steel clamp rotation prevention jig 14 into at least one of the bolt holes 8 of the aluminum clamp 1 that can be inserted through it and the bolt hole 7 (elongated hole) of the steel clamp 2. and then tighten the screws 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, making it impossible to insert the bolt 6 when tightening the jumper branch. It is made 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. It disappears, but there is no collision.

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

After the wire has been stretched, the jumper branch 4 as shown in FIG. 5 is fitted into the connection 5 of the clamp body 3, and the bolts 6 are passed through the bolt holes 7 and 8. Tightening completes the assembly of the retaining clamp.

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

In the clamp body of the above-mentioned metal wheel passing type reverse compression retention clamp, the bolt holes of the steel clamp through which the bolts are passed are tightened to connect the jumper branches.
Since it consists of a common long hole for multiple bolts, 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, which prevents steel clamping properly. By using a jig, even if the aluminum clamp extends toward the steel clamp during compression and the bolt holes move, the center lines will remain the same, making it extremely easy to align the centers of both bolt holes after compression. be able to.

[Brief explanation of the drawing]

Figures 1 to 3 are diagrams showing the steps of assembling the clamp body according to the present invention in order of process. (B) is a side view, Figures 2 (A) and (B) show the aluminum clamp before compression, (A) is a front view, (B) is a side view, and Figure 3 is an assembled FIG. 4 is a side view showing the steel clamp rotation prevention jig shown in FIG. 2. FIGS. Figure 1 shows a jumper branch used for the jumper branch, (A) is a front view, (B) is a side view, and (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 with bolt, 7, 8... Bolt hole, 9... Feeler gauge, 10... Steel core aluminum stranded wire (ACSR), II... 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 compression-connecting the steel core of the ACSR to the above-mentioned steel clamp, an aluminum clamp is placed over it, and the center lines of the bolt holes of both are aligned, and at least one of the bolt holes of the aluminum clamp and the length of the steel clamp are connected. A steel clamp rotation prevention jig is inserted into the hole to prevent the steel clamp from rotating, and the aluminum clamps are sequentially compressed toward the steel clamp side to integrate them, and then the rotation prevention jig is removed and the jumper is branched. A method for assembling a metal wheel passing type reverse compression type retaining clamp characterized by connecting parts with bolts.