JPH07262846A - Mounting unit for lighting protection insulator - Google Patents

Abstract

PURPOSE:To provide a mounting unit for a lighting protection insulator, which can be simply mounted on/demounted from an angle material the vertical end face of which is faced downward, concurrently can enhance its strength, and furthermore can easily cope with the angle material even if the applied dimension of the angle material is changed. CONSTITUTION:A reinforcing plate 13 which is oppositely in contact with the vertical rib 12a of an angle material 12 is provided for the lower surface of a base 11 to be rested on the horizontal rib 12a of the angle material 12. A hole to which a bolt 18 fastening a fastening fitting 17 at the base 11 side is made an oblong 11b. A J bolt 14 which is hooked so as to be fixed to the lower end section of the vertical rib 12b of the angle 12 is disposed in a base 11 area at the tip end side from the fastening fitting 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightning arrester mounting unit for mounting a lightning arrester for a transmission line on a support arm of a steel tower.

[0002]

2. Description of the Related Art Heretofore, as a mounting unit for a lightning protection insulator of this type, the following mounting unit for a lightning protection insulator has been proposed. As shown in FIGS. 8 and 9, a mounting adapter 111 for mounting and supporting the lightning protection insulator 110 includes a fixed mounting plate 113 arranged on the bottom surface of the horizontal rib 112a of the angle member 112 that constitutes the support arm of the steel tower, and the angle member 11.
Locking metal fittings 114 that are locked to the two vertical ribs 112b,
Fastening fitting 115 arranged on the upper surface of the horizontal rib 112a
And a movable mounting plate 116 for supporting the lightning protection insulator, the position of which is adjustable in the horizontal direction with respect to the tightening fitting 115.

The upper end of the locking member 114 is formed in a U shape so as to engage with the upper edge of the vertical rib 112b of the angle member 112. One end of the tightening member 115 is bent by an amount corresponding to the thickness of the horizontal rib 112a of the angle member 112, and the horizontal rib 112a can be sandwiched between the fixed mounting plate 113 and the fixed mounting plate 113.

The fixed mounting plate 113 is arranged on the bottom surface of the horizontal rib 112a of the angle member 112, and the locking metal fitting 114 is attached to the vertical rib 11 of the angle member 112.
Lock to 2b. In this state, the locking metal fitting 114 is tightened and fixed to the fixed mounting plate 113 with the bolt 117. In addition, the tightening fitting 115 is attached to the horizontal rib 11 of the angle member 112.
It is arranged on the upper surface of 2a and fixed to the fixed mounting plate 113 with bolts 118. Furthermore, the movable mounting plate 11
6 is attached to the fixed mounting plate 113 with a bolt 119, and the lightning protection insulator 11 is attached to the tip of the movable mounting plate 116.
Suspend 0.

An example of the mounting unit different from the above type is the mounting unit shown in FIG. By using the mounting plate 120 and the first L-shaped clamp metal fitting 121 and the second L-shaped clamp metal fitting 122, both clamp metal fittings 12
The angle member 112 is sandwiched between 1,122 and the bolt 1
At 23, both clamps 121, 122 are tightened. Then, the attachment plate 120 is attached to the extension portion of the first L-shaped clamp 121 by the bolts 124 inserted into the elongated holes 125. The lightning arrestor is supported on the tip of the mounting plate 120.

[0006]

However, in the former mounting unit, one end of the tightening metal fitting 115 is tightened and fixed to the fixed mounting plate 113 with the bolt 118, and the angle member 112 is bent at the engaging portion. Horizontal rib 112a
Press. For this reason, it is necessary to match the degree of bending of the fastening member 115 with the thickness of the horizontal rib 112a, which makes the production of the fastening member 115 cumbersome. If the degree of bending of the fastening member 115 does not match the thickness of the horizontal rib 112a, the clamping force with respect to the fixed mounting plate 113 is insufficient and rattling occurs. Moreover, when the vertical ribs 112b and the horizontal ribs 112a of the angle member 112 have different thicknesses, the locking fitting 11
However, there was a problem that it was not possible to use the No. 4 and the tightening fitting 115 as they were. Further, the mounting of the mounting unit to the angle member 112 is performed by the bolt 117 or the bolt 118.
Since it has to be removed, there is a problem that mounting workability is poor.

On the other hand, in the latter mounting unit, first, the two clamps 121, 122 must be mounted on the angle member 112, and then the mounting plate 120 must be mounted on the extension of the first L-shaped clamp 121. Moreover, there are many places to attach with bolts. Therefore, there is a problem that the structure is complicated, the mounting is troublesome, and the number of parts is large and the handling is inconvenient. In addition, the bolt 124 has the long hole 1
Since it is inserted into the mounting plate 25, the tightening position of the bolt 124, that is, the mounting plate 1 for the angle member 112.
It was difficult to position 20.

Also, in any of the mounting units,
It cannot be used when the angle member 112 faces upside down from FIG. 8, that is, when the end face of the vertical rib 112b faces downward.

The present invention has been made to solve the above problems, and its purpose is to easily attach and detach to and from an angle member having vertical rib end faces facing downward, and to improve strength. Further, it is an object of the present invention to provide a lightning protection insulator mounting unit that can easily cope with a change in the applied size of the angle member.

[0010]

[Means for Solving the Problems] In order to achieve the above object, in the lightning protection insulator mounting unit according to claim 1,
A substrate arranged on the upper surface of the horizontal rib of the angle member that constitutes the support arm of the steel tower, and supporting the lightning protection insulator at the tip side, and the substrate provided at the base end side of the substrate, and the cooperation of the substrate by tightening the bolt. The fastening metal fitting that holds the horizontal rib of the angle member by the action, and the latch metal fitting that is provided at the board portion on the tip side of the fastening metal fitting and that is latched and fixed to the lower end portion of the vertical rib of the angle material. The point is to become.

The gist of the invention is to provide a reinforcing plate on the lower surface of the substrate so as to face the vertical rib of the angle member. In a third aspect of the present invention, the gist of the invention is that the bolt for fastening the fastening member to the board side is inserted into an elongated hole formed in the board.

[0012]

According to the first aspect, when the mounting unit is mounted on the angle member, first, the substrate is placed on the upper surface of the horizontal rib of the angle member. Then, the hooking metal is hooked on the lower end of the vertical rib of the angle member. Then, by tightening the bolts in this state, the horizontal rib of the angle member is firmly sandwiched by the cooperative action of the substrate and the tightening metal fitting. Also,
When removing the mounting unit from the angle member, loosen the bolts to release the clamping of the horizontal rib of the angle member between the board and the clamp. Then, by removing the hook metal fitting from the vertical rib, the mounting unit can be easily removed from the angle member. As described above, according to the present invention, the mounting unit can be easily attached to and detached from the angle member without removing the bolt.

According to the second aspect, when mounting the mounting unit on the angle member, the substrate is placed on the upper surface of the horizontal rib of the angle member. At this time, the reinforcing plate is brought into contact with the vertical rib of the angle member. As a result, the substrate is positioned with respect to the horizontal rib of the angle member. After that, the same procedure as in claim 1 is performed.

Further, since the reinforcing plate is provided on the substrate,
The strength of the substrate is improved. Further, since the reinforcing plate is in contact with the vertical rib of the angle member, the bending moment of the substrate due to the weight of the lightning arrestor also acts on the vertical rib of the angle member. As a result, the strength of the angle member can be effectively utilized.

According to the third aspect of the present invention, since the bolt for fastening the fastening member to the board side is inserted into the long hole formed in the board, the length of the horizontal rib of the angle member changes. Can also accommodate it.

[0016]

[Embodiment] An embodiment embodying a mounting unit and a mounting bracket of a lightning protection insulator of the present invention will be described in detail below with reference to the drawings. As shown in FIGS. 4 and 5, the normal insulator 1
Is fixedly arranged on the angle member 12 which constitutes the support arm 4 of the steel tower through the fixing metal fitting 2 and the U bolt 3. A plurality of normal insulators 1 are connected to form an insulator string 6. An electric wire clamp 7 is connected to the lower end of the insulator string 6. A power transmission line 8 is supported by the electric wire clamp 7. The charging-side arc horn 9 is attached to the power transmission line 8.

As shown in FIGS. 1 to 3, the substrate 11 of the mounting unit 10 of this embodiment is arranged on the upper surface of the horizontal rib 12a of the angle member 12 having an inverted L-shaped cross section. A pair of J-bolt insertion holes 11a are formed in the substrate 11 substantially at the center thereof. Further, a pair of elongated holes 11b extending in the horizontal direction is formed on the base end side (left side in FIGS. 1 and 2) of the substrate 11 so as to be transparent. Further, a pair of front and rear adapter bolt insertion holes 11c are provided in the center of the substrate 11 on the front end side. A reinforcing plate 13 is fixed to the lower surface of the substrate 11 by welding so as to face and contact the vertical ribs 12b of the angle member 12.

J-bolts 14 as hooks are inserted into both J-bolt insertion holes 11a of the substrate 11, respectively. The J-bolt 14 has a male screw formed on the upper portion thereof, and a lower portion thereof serves as a hook-shaped hooking portion 14a.

The hook portion 14a of the J bolt 14 is hooked on the lower end of the vertical rib 12b of the angle member 12, and the upper portion is inserted into the J bolt insertion hole 11a of the substrate 11.
A double nut 16 is screwed onto the male screw from above the substrate 11 via a washer 15. Further, in this state, the reinforcing plate 13 attached to the lower surface of the substrate 11 firmly contacts and contacts the vertical ribs 12b of the angle member 12, and the substrate 11 is fixed to the angle member 12 in a stable state. .

Bolts 18 are inserted into both elongated holes 11b of the base plate 11 via fastening metal fittings 17, and a double nut 29 is screwed into each bolt 18 via a common washer 19. Has been done. The fastening member 17 is formed in a substantially horizontal L-shape in cross section, and the curved portion 17a at the end serves as a spacer. Then, when the bolts 18 are tightened to crimp the fastening member 17 to the horizontal rib 12a of the angle member 12, the curved portion 17a serves as a fulcrum, and the fastening member 17 is effectively crimped to the horizontal rib 12a.

Adapter bolt insertion hole 11c of substrate 11
The bolt 20 is inserted through the lower part of the. The bolt 20 is inserted through the bolt insertion holes 21a and 21b of the adapter 21 that supports the lightning protection insulator 22 on the tip side. A double nut 24 is screwed onto the bolt 20 via a washer 23 on the upper surface of the adapter 21.
One of the bolt insertion holes 21b of the adapter 21 is an elongated hole having an arc shape, and the adapter 21 is the other bolt insertion hole 21.
It is rotatable about the bolt 20 inserted in a.

As shown in FIGS. 1 and 5, the lightning protection insulator 22 is attached to the tip of the adapter 21 by a bolt 25. The lightning protection insulator 22 accommodates a resistance element 22a whose main component is zinc oxide and whose voltage-current characteristic is non-linear. The arc horn mounting bracket 26 is mounted and supported on the lower end of the lightning protection insulator 22, and the ground side arc horn 27 is mounted on the arc horn mounting bracket 26. And
The grounding side arc horn 27 is disposed so as to face the charging side arc horn 9 provided on the power transmission line 8, and an air discharge distance G is formed between the two.

When a lightning surge current enters the power transmission line 8 due to a lightning stroke, the current flashes over the air discharge distance G and flows into the resistance element 22a in the lightning protection insulator 22.
Further, the current flows through the adapter 21 and the substrate 11 to the support arm 2 and is discharged from the steel tower to the ground. Further, the subsequent flow due to the operating voltage generated thereafter is suppressed and cut off by the resistance element 22a in the lightning protection insulator 22 and the air discharge distance G.

Next, the operation of mounting the mounting unit 10 on the angle member 12 will be described. First, as shown in FIG. 6, the substrate 11 is placed on the upper surface of the horizontal rib 12 a of the angle member 12. In this state, the substrate 11 is slid to the base end side (left side in the figure) until the reinforcing plate 13 comes into contact with the vertical ribs 12b of the angle member 12 so as to face each other. That is, the horizontal position of the substrate 11 with respect to the angle member 12 is determined by the contact between the reinforcing plate 13 and the vertical rib 12b of the angle member 12. next,
As shown in FIG. 7, the hook portion 14b of the J bolt 14 is hooked on the lower end of the vertical rib 12b of the angle member 12. Then, the double nut 16 is tightened. As a result, the lower ends of the vertical ribs 12b are brought into pressure contact with the hooking portions 14b, and the substrate 11 is prevented from rising from the angle member 12.

Next, the bolt 18 is attached to the long hole 11b of the substrate 11.
Along the horizontal rib 1 of the angle member 12
The bolt 18 is moved until it contacts the end face of 2a. After moving the clamp 17, the bolt 18 is tightened.
As a result, the horizontal rib 12a of the angle member 12 is attached to the substrate 1
It is firmly clamped by 1 and the clamp 17.

After the unit 10 is attached to the angle member 12, the adapter 21 having the lightning protection insulator 22 attached thereto is attached to the substrate 11. At this time, the bolts 25a and 25b are not completely tightened, and the adapter 21 is allowed to rotate around the bolt 25a. Then, the adapter 21 is rotated to adjust the gap G so that a predetermined gap G is formed between the charging side arc horn 9 and the grounding side arc horn 27, and the bolts 25a and 25b are fixed by tightening at that position. .

The mounting unit 10 and the lightning protection insulator 22 are mounted as described above. As described above, according to the mounting unit 10 of the lightning protection insulator 22 of the present embodiment, the angle member 12 in which the end face of the vertical rib 12b faces downward.
It can be easily attached to. Also, the horizontal rib 12
The angle member 12 having different lengths and thicknesses of a and vertical ribs 12b of different lengths and thicknesses can be easily and surely attached. Moreover, it is not necessary to remove the bolts 14, 18 and 20 when the unit 10 is attached and detached, and the workability of attachment and detachment is further improved.

In this embodiment, the reinforcing plate 1 is attached to the substrate 11.
By providing 3, the vertical rib 1 of the angle member 12 when the mounting unit 10 is attached to the angle member 12 is provided.
By making contact with 2b, the horizontal positioning of the substrate 11 with respect to the horizontal rib 12a of the angle member 12 can be quickly performed. Further, the strength of the substrate 11 is improved by providing the reinforcing plate 13 on the substrate 11. Also,
Since the reinforcing plate 13 is also in contact with the vertical rib 12b of the angle member 12, the substrate 11 due to its own weight of the lightning arrester 11
Bending moment also acts on the vertical rib 12b of the angle member 12. As a result, the strength of the angle member 12 can be effectively utilized.

Other technical ideas grasped by the above embodiments will be described below together with their effects. (1) A spacer, which is a fulcrum when tightening the horizontal rib of the angle member, is integrally formed at an end of the fastening member that is in contact with the horizontal rib of the angle member and opposite to the end of the fastening member. A lightning insulator mounting unit according to any one of 1.

According to this structure, the horizontal rib of the angle member can be tightened more firmly without increasing the number of parts.

[0031]

As described in detail above, according to the first aspect, the excellent effect that the vertical rib end face can be attached to the support arm composed of the angle member facing downward is exerted.

According to the second aspect, when the mounting unit is attached to the angle member, the reinforcing plate and the vertical rib of the angle member are brought into contact with each other, whereby the horizontal positioning of the substrate with respect to the angle member can be easily performed. it can. Further, the strength of the substrate can be improved by providing the reinforcing plate on the substrate. Furthermore, since the bending moment of the substrate due to the weight of the lightning arrestor also acts on the vertical rib of the angle member via the reinforcing plate, the strength of the angle member can be effectively utilized.

According to the third aspect of the present invention, since the bolt for fastening the fastening member to the board side is inserted into the elongated hole formed in the board, the applicable dimension of the angle member (especially the length of the horizontal rib). ) Changes, you can easily cope with it.
In addition, since it is not necessary to remove the bolts when attaching or detaching the unit to or from the angle member, there is an excellent effect that the detachability of the attached unit can be further improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which an attachment unit according to an embodiment of the present invention is attached to an angle member.

FIG. 2 is a bottom view showing a state in which the mounting unit is mounted on the angle member.

FIG. 3 is a side view showing a state in which the mounting unit is mounted on an angle member.

FIG. 4 is a plan view showing a state where the lightning protection insulator device is attached to a support arm of a steel tower by an attachment unit.

FIG. 5 is a front view showing a state in which the lightning protection insulator device is attached to a support arm of a steel tower by an attachment unit.

FIG. 6 is a front view showing a process of mounting the mounting unit on the angle member.

FIG. 7 is a front view showing a stroke when the mounting unit is mounted on the angle member.

FIG. 8 is an exploded perspective view showing a conventional mounting unit.

FIG. 9 is a front view showing a state in which a conventional mounting unit is mounted on an angle member.

FIG. 10 is a front view showing a state in which a conventional mounting unit different from that in FIG. 9 is mounted on an angle member.

[Explanation of symbols]

11 ... Substrate, 11b ... Long hole, 12 ... Angle material constituting a support arm of a steel tower, 12a ... Horizontal ribs, 12b ... Vertical ribs, 13 ... Reinforcing plate, 14 ... J bolts as hooks, 17 ... Tightening Metal fittings, 18 ... Bolts, 22 ... Lightning arresters

Claims (3)

[Claims] 1. A substrate which is arranged on the upper surface of a horizontal rib of an angle member which constitutes a support arm of a steel tower and which supports a lightning protection insulator at a tip side thereof, and a hook which is hooked and fixed to a lower end portion of a vertical rib of the angle member. A lightning arrester mounting unit comprising: a metal fitting; and a metal fitting provided on the base end side of the base plate, which clamps a horizontal rib of an angle member by a cooperative action with the base plate by tightening a bolt. 2. The lightning protection insulator mounting unit according to claim 1, wherein a reinforcing plate is provided on a lower surface of the substrate so as to face the vertical rib of the angle member. 3. The lightning protection insulator mounting unit according to claim 1, wherein the bolt for tightening the fastening member to the board side is inserted into an elongated hole formed in the board.