JPH1197086A - Attaching fitting of earth plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably, safely and easily attach an earth plate to a steel tower angle by fastening an attaching block to be engaged with the base part of the earth plate attached along the outer surface of the vertical side of an L- shaped steel tower angle and a movable block diagonally arranged on the tip of the horizontal side by a fastening bolt, and fixing them to the steel tower angle. SOLUTION: An earth plate 1 against which a reinforcing plate 2 is held is attached to the outer surface of the vertical side part 5a of a steel tower angle 5 having the L-shaped section, an attaching block 6 is locked on the base part 1a of the earth plate 1, a fixing bolt 13 to be inserted through an elongated hole 4 of the earth plate 1 is fastened, and the earth plate 1 is bonded to the vertical side part 5a. A fastening bolt 8 extending diagonally up toward the tip of the horizontal side part 5f of the steel tower angle is fixed to the attaching block 6, and the threaded part 8a is inserted through a through hole 10 of a movable block 9 arranged on the tip of the horizontal side part 5f. By fastening a fastening nut 11 by this structure, the attaching block 6 and the movable block 9 are fixed to the steel tower angle 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a ground plate of a transmission tower, for example, and more particularly, to a mounting bracket for fixing a ground plate without processing a tower angle.

[0002]

2. Description of the Related Art As is well known, to perform so-called "stop work" in a transmission line or the like, a ground plate is fixed to a tower angle which is a part of a tower, and the ground plate is connected to the tower via a tower. Ground the induced current.

FIG. 4 shows a conventional mounting structure of the ground plate A. When the ground plate A is fixed to a tower angle, the ground plate A is mounted using two bolts B and nuts C. The hole a is fixed to the fixing hole d of the tower angle D.

[0004]

In the conventional mounting structure of the grounding plate A, the fixing hole d must be formed in the tower angle D by post-processing. Since the work is performed on a tower with a poor scaffolding, the work is not only extremely dangerous, but also involves the risk of removing the bolts B and nuts C during the mounting work.

SUMMARY OF THE INVENTION In view of the above-mentioned problem of the conventional ground plate mounting structure as described above, it is not necessary to perform post-processing on the tower angle, and the mounting parts and the like are removed during the mounting operation. An object of the present invention is to provide a mounting plate for a ground plate which is less likely to be dropped.

[0006]

In order to achieve this object, the present invention relates to a structure for fixing a grounding plate having a grounding tool mounting hole to a tower angle having an L-shaped cross section. A mounting block having a hook for locking a base of the ground plate, which is arranged along the outer surface of one side of the angle, and a connection positioned along the outer surface of the other side A movable block having a portion and having a tightening bolt extending from the mounting block penetrated therein; and a tightening nut screwed into the tightening bolt to tighten the mounting block and the movable block to the corresponding side portions. And a fixing bolt for a ground plate, comprising: a fixing bolt penetrating through a fixing hole formed in a portion near the base of the ground plate and having a tip screw portion screwed into a female screw of the connecting portion.

In the following description of a preferred embodiment of the present invention, the fixing hole is a long hole extending in the length direction of the ground plate, and the tower is moved by moving the fixing bolt along the long hole. A disc spring is fitted between the structure corresponding to the cross-sectional dimensional difference of the angle and the surface of the ground plate on the fixing bolt, and the elastic deformation of the disc spring prevents the loosening of the subsequent mounting state. Structure is described.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. The grounding plate 1 in the illustrated embodiment is reinforced by applying a reinforcing plate 2 having bending rigidity to a base portion.
A slot 4 extending in the length direction from the base 1a.
(Fixing holes) are formed in advance.

Then, the base 1a of the ground plate 1 and the reinforcing plate 2
Is extended along the outer surface of the vertical side 5a of the tower angle 5 to which the ground plate 1 is attached, and the vertical side 5
a of the mounting block 6 located at the lower part of the base plate 1a, and is grounded to the steel tower angle 5 by being closely attached to the outer surface thereof. Is formed, and the hook 6a is engaged with the notch 7.

Further, the mounting block 6 which is formed by metal molding.
A tightening bolt 8 extending diagonally upward toward the tip of the horizontal side 5b of the tower angle 5 is fixed to the movable tower 9 which is disposed at the tip of the horizontal side 5b. Through the through hole 10. The movable block 9, which is made of metal in the same manner as the mounting block 6, has the connecting portion 9a located on the outer surface side of the horizontal side portion 5b, so that the tightening nut 11 screwed into the screw portion 8a of the tightening bolt 8 is used. By tightening, both the mounting block 6 and the movable block 9 are securely fixed to the tower angle 5.

A screw 12 is formed in the connecting portion 9a so as to face the elongated hole 4, and a female screw 12 is formed in the elongated hole 4.
The screw portion 13a of the fixing bolt 13 penetrated through the hole is screwed. By tightening the fixing bolt 13, the ground plate 1 is completely adhered to the vertical side portion 5a of the tower angle 5.

In the illustrated embodiment, the fixing bolt 13
A plurality of disc springs 14 are interposed between the head 13b and the surface of the reinforcing plate 2, but the elastic deformation of these disc springs 14 prevents the subsequent loosening of the fixing bolts 13, Poor contact between the tower angle 5 and the ground plate 1 due to the loosening is prevented. Of course, when the ground plate 1 is actually mounted, a conductive compound is used on the contact surface between the vertical side 5a of the tower angle 5 and the ground plate 1.

Incidentally, the reference numeral "15" in FIG.
The O-ring 15 is located in the annular groove 3, and the O-ring 15 prevents the fixing bolt 13 from separating and falling off from the ground plate 1 and the reinforcing plate 2.

Since the mounting plate for the ground plate according to the illustrated embodiment has the above-described structure, the ground plate 1 is attached to the steel tower angle 5.
When mounting, the tightening nut 11 and the fixing bolt 13 may be sufficiently loosened. That is, by sufficiently loosening the tightening nut 11, the mounting block 6 and the movable block 9 are moved so that the vertical side portion 5a and the horizontal side portion 5b of the tower angle 5 are located inside the hook 6a and the connecting portion 9a. Is assembled to the tower angle 5, and the tightening nut 11 is operated with a fingertip to temporarily fix the mounting block 6 and the movable block 9 to the tower angle 5.

Thereafter, the ground plate 1 and the reinforcing plate 2 are slightly lifted up along the elongated hole 4 so that the notch 7 of the ground plate 1 matches the hook 6a of the mounting block 6, and the ground plate 1 and the reinforcing plate 2
Is lowered along the long hole 4, the inclination of the ground plate 1 with respect to the tower angle 5 is eliminated. Therefore, when the tightening nut 11 is strongly tightened, the mounting block 6 and the movable block 9 are firmly fixed to the tower angle 5 via the rigid tightening bolt 8, but if the tightening bolt 13 is tightened after this tightening, Since the base 1a of the ground plate 1 is placed in close contact with the tower angle 5 vertically, the tightening nut 1
By simply operating the fixing bolt 1 and the fixing bolt 13, the mounting operation can be completed without removing parts.

[0016]

As is apparent from the above description, according to the present invention, the ground plate can be securely fixed to the tower angle only by tightening the tightening nut and the fixing bolt.
Compared to conventional installation work that requires drilling on the tower,
It is a much safer and easier installation task. Also, since the mounting bracket of the present invention is an integral type that is not easily disassembled,
The risk of dropping parts or the like during the mounting operation can be avoided.

[Brief description of the drawings]

FIG. 1 is a perspective view of a mounting bracket of the present invention mounted on a tower angle.

FIG. 2 is a sectional view of the mounting bracket taken along line 2-2 of FIG.

FIG. 3 is a right side view of the mounting bracket.

FIG. 4 is an exploded perspective view of a conventional ground plate mounting structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ground plate 1a Base 2 Reinforcement plate 3 Grounding tool mounting hole 4 Slotted hole (fixing hole) 5 Tower angle 5a Vertical side 5b Horizontal side 6 Mounting block 6a Hook 7 Notch 8 Tightening bolt 9 Movable block 9a Connecting portion 11 tightening nut 12 female thread 13 fixing bolt 14 disc spring 15 o-ring

Claims (3)

[Claims] 1. A structure in which a grounding plate having a grounding tool mounting hole formed therein is fixed to a tower angle having an L-shaped cross section, wherein the grounding plate is provided along an outer surface of one side of the tower angle. A mounting block having a hook for locking the base of the ground plate, and a tightening bolt having a connecting portion positioned along the outer surface of the other side and extending from the mounting block. A movable block which is put in a penetrating state, a tightening nut which is screwed into the tightening bolt to tighten the mounting block and the movable block to the corresponding side portions, and a fixing formed at a portion near a base of the ground plate A fixing bolt that penetrates the hole and has a tip screw portion screwed into a female screw of the connection portion. 2. The fixing hole is a long hole extending in a length direction of the ground plate, and the movement of the fixing bolt along the long hole corresponds to a difference in cross-sectional dimension of the tower angle. The mounting bracket for a ground plate according to claim 1, wherein: 3. A disc spring is fitted between the fixing bolt and the surface of the ground plate, and a subsequent loosening of the mounted state is prevented by elastic deformation of the disc spring. The mounting plate for a ground plate according to claim 1 or 2.