JP3919899B2 - Grounding plate mounting bracket - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to, for example, a mounting structure for a grounding plate of a transmission line tower, and more particularly, to a mounting bracket for fixing the grounding plate without processing the tower angle.
[0002]
[Prior art]
As is well known, in order to carry out so-called “stopping work” in a transmission line or the like, a grounding plate is fixed to a tower angle that is a part of a steel tower, and an induced current is grounded from the grounding board via the steel tower. .
[0003]
That is, FIG. 4 shows a conventional mounting structure of the above-mentioned ground plate A. When fixing the ground plate A to the tower angle, the mounting holes a of the ground plate A are formed using two bolts B and nuts C. Fix to the fixing hole d of the tower angle D.
[0004]
[Problems to be solved by the invention]
By the way, in such a conventional mounting structure of the ground plate A, it is necessary to post-process the fixing hole d with respect to the steel tower angle D. However, the drilling operation of the fixing hole d is a tower work with poor scaffolding. Therefore, it is not only a very dangerous work, but also involves the risk of removing the bolts B and nuts C during the installation work.
[0005]
The object of the present invention is to eliminate the need for post-processing on the tower angle in view of the problems of the conventional ground plate mounting structure as described above, and there is a risk that mounting parts and the like will be dropped during the mounting operation. There is a need to obtain a mounting plate for a ground plate that is less likely.
[0006]
[Means for Solving the Problems]
In order to achieve this object, the present invention provides a structure for fixing a grounding plate in which a grounding tool mounting hole is formed to a steel tower angle having an L-shaped cross section, and an outer side of one side portion of the steel tower angle. A mounting block having a hook for locking the base portion of the grounding plate, which is in a state along the surface, and a connecting portion positioned along the outer surface of the other side portion, and from the mounting block A movable block that allows the extended tightening bolt to pass through; a tightening nut that is screwed into the tightening bolt to tighten the mounting block and the movable block to the corresponding side portion; and a base near the base of the ground plate The present invention proposes a mounting member for a grounding plate, which includes a fixing bolt that is penetrated through a fixing hole formed in a portion and that has a tip screw portion screwed into a female screw of the connecting portion.
[0007]
In the description of the preferred embodiments of the present invention described later, the fixing hole is a long hole extending in the length direction of the ground plate, and the section of the tower angle is moved by the movement of the fixing bolt along the long hole. A structure corresponding to a dimensional difference, and a structure in which a disc spring is fitted between the fixing bolt and the surface of the ground plate, and subsequent loosening of the mounting state is prevented by elastic deformation of the disc spring. Explained.
[0008]
【Example】
The details of the embodiment of the present invention will be described below with reference to FIGS.
The grounding plate 1 in the illustrated embodiment is reinforced by applying a reinforcing plate 2 having bending rigidity to the base, and two grounding tool mounting holes 3 are provided near the tip of the grounding plate 1 from the base 1a. A long hole 4 (fixed hole) extending in the length direction is previously formed in the portion.
[0009]
The base portion 1a and the reinforcing plate 2 of the ground plate 1 are extended along the outer surface of the vertical side portion 5a of the tower angle 5 to which the ground plate 1 is attached and are positioned below the vertical side portion 5a. Although it is in close contact with the outer surface by the hook 6a of the mounting block 6 and is grounded to the tower angle 5, a notch for preventing the ground plate 1 from tilting at the center in the width direction of the lower edge of the ground plate 1 and the reinforcing plate 2 7 is formed, and the hook 6 a is engaged with the notch 7.
[0010]
Further, a fastening bolt 8 extending obliquely upward toward the tip of the horizontal side portion 5b of the tower angle 5 is fixed to the mounting block 6 formed by metal, and the screw portion 8a of the fastening bolt 8 is connected to the horizontal side portion 5b. It penetrates through the through hole 10 of the movable block 9 arranged at the tip of the part 5b.
The movable block 9 that is metal-processed in the same manner as the mounting block 6 has a connecting portion 9a located on the outer surface side of the horizontal side portion 5b, so that the tightening nut 11 screwed into the threaded portion 8a of the tightening bolt 8 is provided. By tightening, both the mounting blocks 6 and the movable block 9 are securely fixed to the tower angle 5.
[0011]
A screw 12 is formed in the connecting portion 9 a so as to face the long hole 4, and a screw portion 13 a of a fixing bolt 13 passing through the long hole 4 is screwed into the female screw 12. By tightening, the ground plate 1 is brought into a complete contact state with the vertical side portion 5 a of the tower angle 5.
[0012]
In the illustrated embodiment, a plurality of disc springs 14 are interposed between the head 13 b of the fixing bolt 13 and the surface of the reinforcing plate 2. Thus, the loose fixing bolt 13 is prevented from loosening, and poor contact between the tower angle 5 and the ground plate 1 due to the loosening is prevented.
Of course, in the actual mounting of the ground plate 1, a conductive compound is used on the contact surface between the vertical side 5 a of the tower angle 5 and the ground plate 1.
[0013]
2 is an O-ring positioned in the annular groove of the fixing bolt 13. The O-ring 15 prevents the fixing bolt 13 from being separated or dropped from the ground plate 1 and the reinforcing plate 2. It will be.
[0014]
Since the mounting bracket for the ground plate according to the illustrated embodiment has the above-described structure, when the ground plate 1 is attached to the tower angle 5, the tightening nut 11 and the fixing bolt 13 may be sufficiently loosened.
That is, the mounting block 6 and the movable block 9 are arranged so that the vertical side portion 5a and the horizontal side portion 5b of the tower angle 5 are positioned inside the hook 6a and the connecting portion 9a by sufficiently loosening the tightening nut 11. Is attached 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.
[0015]
Thereafter, the ground plate 1 and the reinforcing plate 2 are slightly lifted along the long holes 4 so that the notches 7 of the ground plate 1 are aligned with the hooks 6 a of the mounting block 6. , 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 attachment block 6 and the movable block 9 are firmly fixed to the tower angle 5 via the rigid tightening bolts 8. After tightening, the fixing bolt 13 is tightened. Since the base 1a of the ground plate 1 is brought into close contact after the tower angle 5 is vertical, the mounting operation can be completed by simply operating the tightening nut 11 and the fixing bolt 13 without removing the parts.
[0016]
【The invention's effect】
As is clear from the above description, according to the present invention, since the ground plate can be securely fixed to the tower angle only by the tightening operation of the tightening nut and the fixing bolt, the conventional drilling on the tower is required. Compared to the installation work, the installation work is much safer and simpler.
In addition, since the mounting bracket of the present invention is an integrated type that is not easily disassembled, it is possible to avoid the risk of removing parts and the like during the mounting operation.
[Brief description of the drawings]
FIG. 1 is a perspective view of a mounting bracket of the present invention in a state of being mounted on a steel tower angle.
FIG. 2 is a cross-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]
1 Grounding plate 1a Base 2 Reinforcing plate 3 Grounding tool mounting hole 4 Long hole (fixing hole)
5 Steel tower angle 5a Vertical side 5b Horizontal side 6 Mounting block 6a Hook 7 Notch 8 Tightening bolt 9 Movable block 9a Connection part 11 Tightening nut 12 Female thread 13 Fixing bolt 14 Disc spring 15 O ring

Claims (3)

In the structure for fixing a grounding plate in which a grounding tool mounting hole is formed to a steel tower angle having an L-shaped cross section, the contact that is in a state along the outer surface of one side portion of the steel tower angle. A mounting block having a hook for locking the base portion of the main plate and a connecting bolt positioned along the outer surface of the other side portion and a fastening bolt extended from the mounting block are put through. A movable block; a tightening nut that is screwed into the tightening bolt to tighten the mounting block and the movable block to the corresponding side portion; and a fixing hole formed in a portion near the base of the ground plate; A mounting bracket for a ground plate, comprising: a fixing bolt for screwing a tip screw portion into a female screw of the connecting portion. The fixing hole is an elongated hole extending in a length direction of the ground plate, and corresponds to a cross-sectional dimension difference of the tower angle by movement of the fixing bolt along the elongated hole. 1. A mounting plate for the ground plate according to 1. 3. A disc spring is fitted between the fixing bolt and the surface of the ground plate, and subsequent loosening of the mounting state is prevented by elastic deformation of the disc spring. Mounting plate for the described ground plate.

Images