JP2928720B2 - Lightning arrester mounting unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, as a mounting unit for a lightning arrester of this type, the following mounting unit for a lightning arrester has been proposed. As shown in FIGS. 8 and 9, a mounting adapter 111 for mounting and supporting the lightning arrester 110 includes a fixed mounting plate 113 disposed on the bottom surface of a horizontal rib 112 a of an angle member 112 constituting a support arm of a tower, and an angle member 11.
A lock fitting 114 locked to the second vertical rib 112b;
Fastener 115 disposed on the upper surface of the horizontal rib 112a
And a movable mounting plate 116 for supporting a lightning arrester that can be horizontally adjusted with respect to the clamp 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 fastener 115 is bent by an amount corresponding to the thickness of the horizontal rib 112 a of the angle member 112, so that the horizontal rib 112 a can be sandwiched between the fastener 115 and the fixed mounting plate 113.

[0004] A fixed mounting plate 113 is disposed on the bottom surface of the horizontal rib 112a of the angle member 112, and a locking member 114 is connected to the vertical rib 11 of the angle member 112.
2b. In this state, the locking fitting 114 is tightened and fixed to the fixed mounting plate 113 with the bolt 117. Further, the fastener 115 is connected to the horizontal rib 11 of the angle material 112.
It is arranged on the upper surface of 2a and fastened and fixed to the fixed mounting plate 113 with bolts 118. Further, the movable mounting plate 11
6 is fixed to the fixed mounting plate 113 with bolts 119, and the lightning arrester 11
0 is suspended and supported.

[0005] As an attachment unit different from the above type, there is an attachment unit shown in FIG. Using the mounting plate 120, the first L-shaped clamp 121 and the second L-shaped clamp 122, the two clamps 12 are used.
1 and 122, the angle member 112 is sandwiched and the bolt 1
At 23, the two clamps 121, 122 are tightened. Then, the mounting plate 120 is mounted on the extension of the first L-shaped clamping metal member 121 with the bolt 124 inserted into the elongated hole 125. The lightning arrester is supported on the tip of the mounting plate 120.

[0006]

However, in the former mounting unit, one end of the tightening member 115 is tightened and fixed to the fixed mounting plate 113 with the bolt 118, and the angled member 112 is bent by the bent engaging portion. Horizontal rib 112a
Press. For this reason, it is necessary to match the degree of bending of the fastener 115 with the thickness of the horizontal rib 112a, and the manufacture of the fastener 115 is troublesome. If the degree of bending of the fastener 115 does not match the thickness of the horizontal rib 112a, the clamping force against the fixed mounting plate 113 is not sufficient, and there is a problem that rattling occurs. In addition, when the vertical ribs 112b and the horizontal ribs 112a of the angle member 112 have different thicknesses, the locking metal 11
4 and the clamp 115 cannot be used as they are. The mounting of the mounting unit to the angle member 112 is performed by using the bolt 117 or the bolt 118.
Must be removed, so that there is a problem that the mounting workability is poor.

On the other hand, in the latter mounting unit, first, two clamps 121, 122 must be attached to the angle member 112, and then the attachment plate 120 must be attached to an extension of the first L-shaped clamp 121. In addition, there are many places to attach with bolts. For this reason, there are problems that the structure is complicated, mounting is troublesome, and the number of parts is large, and handling is inconvenient. In addition, the bolt 124 has the long hole 1
25, the tightening position of the bolt 124, that is, the mounting plate 1 with respect to the angle member 112.
20 was difficult to position.

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

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to easily attach / detach an angle member having a vertical rib end face facing downward, and to improve strength. It is still another object of the present invention to provide a lightning arrester mounting unit which can easily cope with a change in the application dimensions of the angle material.

[0010]

[MEANS FOR SOLVING THE PROBLEMS] In order to achieve the above object, in the lightning arrester mounting unit according to claim 1,
A substrate disposed on the upper surface of a horizontal rib of an angle member constituting a support arm of a tower, supporting a lightning arrester at a distal end side, and provided at a base end side of the substrate, and cooperating with the substrate by tightening bolts A fastening member for holding the horizontal rib of the angle material by the action, and a fastening member provided at a substrate portion on a tip side of the fastening metal member and fixed to a lower end portion of the vertical rib of the angle material. Is the gist.

The gist of the present invention is that a reinforcing plate is provided on the lower surface of the substrate so as to be in contact with the vertical rib of the angle member. The gist of the present invention is that a bolt for fastening the fastener to the substrate is inserted into an elongated hole formed in the substrate.

[0012]

According to the first aspect, when mounting the mounting unit to the angle member, first, the substrate is placed on the upper surface of the horizontal rib of the angle member. Next, a latch is hooked on the lower end of the vertical rib of the angle member. Then, by tightening the bolts from this state, the horizontal ribs of the angle material are firmly held by the cooperative action of the substrate and the fastener. Also,
When removing the mounting unit from the angle material, loosen the bolt to release the horizontal rib of the angle material from being clamped by the board and the clamp. Then, by removing the latch from the vertical rib, the mounting unit can be easily removed from the angle member. Thus, 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 the mounting unit is mounted on the angle material, the substrate is placed on the upper surface of the horizontal rib of the angle material. At this time, the reinforcing plate is brought into contact with the vertical rib of the angle material. Thereby, the substrate is positioned with respect to the horizontal ribs of the angle material. The rest is performed in the same manner as in claim 1.

Further, by providing a reinforcing plate on the substrate,
The strength of the substrate is improved. Further, since the reinforcing plate is in contact with the vertical ribs of the angle material, the bending moment of the substrate due to the weight of the lightning arrester also acts on the vertical ribs of the angle material. As a result, the strength of the angle material can be effectively used.

According to the third aspect of the present invention, since the bolt for fastening the fastener to the board is inserted into the elongated hole formed in the board, the length of the horizontal rib of the angle material changes. Can also respond to it.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying a mounting unit and a mounting bracket of a lightning arrester according to the present invention will be described below in detail with reference to the drawings. As shown in FIGS.
Is fixedly disposed on an angle member 12 constituting a support arm 4 of a steel tower via a fixing bracket 2 and a U-bolt 3. Then, a plurality of insulators 1 are usually connected to form an insulator series 6. An electric wire clamp 7 is connected to a lower end of the insulator series 6. A transmission line 8 is supported by the electric wire clamp 7. The power-supply-side arc horn 9 is attached to the 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 a horizontal rib 12a of an angle member 12 having an inverted L-shaped cross section. A pair of J-bolt insertion holes 11a are provided at substantially the center of the substrate 11 through. A pair of elongated holes 11b extending in the horizontal direction are provided on the base end side of the substrate 11 (the left side in FIGS. 1 and 2). Further, a pair of front and rear adapter bolt insertion holes 11c is provided through the center of the distal end side of the substrate 11. On the lower surface of the substrate 11, a reinforcing plate 13 which is opposed to the vertical rib 12b of the angle member 12 is fixed by welding.

A J-bolt 14 as a hook is inserted through both J-bolt insertion holes 11a of the substrate 11. The J-bolt 14 has a male screw formed on the upper part, and the lower part is a hook-shaped hooking part 14a.

The hook 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. In this state, the reinforcing plate 13 attached to the lower surface of the substrate 11 is firmly opposed to the vertical rib 12b of the angle member 12, and the substrate 11 is fixed to the angle member 12 in a stable state. .

A bolt 18 is inserted into each of the long holes 11b of the substrate 11 via a fastening member 17, and a double nut 29 is screwed into each of the bolts 18 through a single washer 19. Have been. The fastening member 17 has a substantially L-shaped cross section, and the curved portion 17a at the end serves as a spacer. Then, when the bolt 18 is tightened to press the fastener 17 against the horizontal rib 12a of the angle member 12, the curved portion 17a serves as a fulcrum, and the fastener 17 is effectively pressed against the horizontal rib 12a.

Adapter bolt insertion hole 11c of substrate 11
, A bolt 20 is inserted from below. Further, the bolt 20 is inserted into bolt insertion holes 21 a and 21 b of an adapter 21 that supports a lightning arrester 22 on a tip end side. A double nut 24 is screwed into 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 a long hole having an arc shape, and the other of the adapter 21 is the other bolt insertion hole 21b.
It is rotatable around a bolt 20 inserted through a.

As shown in FIGS. 1 and 5, the lightning arrester 22 is attached to the tip of an adapter 21 by a bolt 25. The lightning arrester 22 contains a resistance element 22a mainly composed of zinc oxide and having a non-linear voltage-current characteristic. The arc horn mounting bracket 26 is mounted and supported on the lower end of the lightning arrester 22, and a grounding-side arc horn 27 is mounted on the arc horn mounting bracket 26. And
The ground-side arc horn 27 is disposed to face the power-supply-side arc horn 9 provided on the transmission line 8, and an air discharge distance G is formed therebetween.

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

Next, the operation when the mounting unit 10 is mounted 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 12a of the angle member 12. In this state, the substrate 11 is slid to the base end side (the left side in the figure) until the reinforcing plate 13 comes into contact with the vertical rib 12b of the angle member 12 so as to be in contact therewith. That is, the contact between the reinforcing plate 13 and the vertical ribs 12b of the angle member 12 determines the position of the substrate 11 relative to the angle member 12 in the horizontal direction. next,
As shown in FIG. 7, the hook 14 b of the J bolt 14 is hooked on the lower end of the vertical rib 12 b of the angle member 12. Then, the double nut 16 is tightened. Thereby, the lower end of the vertical rib 12b is pressed against the hook portion 14b to prevent the substrate 11 from floating from the angle member 12.

Next, the bolt 18 is inserted into the long hole 11b of the substrate 11.
And tighten the fastener 17 to the horizontal rib 1 of the angle material 12.
The bolt 18 is moved until the bolt 18 comes into contact with the end face of 2a. After moving the fastener 17, the bolt 18 is tightened.
Thereby, the horizontal rib 12a of the angle member 12 is
1 and the clamp 17 are firmly clamped.

After attaching the unit 10 to the angle member 12, the adapter 21 to which the lightning arrester 22 is attached is attached to the substrate 11. At this time, the adapter 21 can rotate around the bolt 25a without completely tightening the bolts 25a and 25b. Then, the adapter 21 is rotated to adjust the gap G so that the predetermined gap G is formed between the power supply side arc horn 9 and the ground side arc horn 27, and the bolts 25a and 25b are tightened and fixed at that position. .

As described above, the mounting unit 10 and the lightning arrester 22 are mounted. As described above, according to the mounting unit 10 of the lightning arrester 22 of the present embodiment, the angle member 12 in which the end face of the vertical rib 12b faces downward.
Can be easily installed. The horizontal rib 12
It can be easily and reliably attached to the angle members 12 having different lengths and thicknesses a and vertical ribs 12b. Moreover, there is no need to remove the bolts 14, 18, and 20 when attaching and detaching the unit 10, and the workability for attachment and detachment is further improved.

In this embodiment, the reinforcing plate 1 is provided on the substrate 11.
3 allows the vertical ribs 1 of the angle member 12 to be mounted when the mounting unit 10 is mounted on the angle member 12.
By making contact with the horizontal ribs 2b, the horizontal positioning of the substrate 11 with respect to the horizontal ribs 12a of the angle member 12 can be quickly performed. Further, by providing the reinforcing plate 13 on the substrate 11, the strength of the substrate 11 is improved. Also,
Since the reinforcing plate 13 is also in contact with the vertical ribs 12b of the angle member 12, the substrate 11
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 used.

Other technical ideas grasped by the above embodiments will be described below together with their effects. (1) A spacer serving as a fulcrum when tightening the horizontal ribs of the angle material is integrally formed at an end of the fastener that is in contact with the horizontal ribs of the angle material, at an end opposite to the end. A mounting unit for a lightning arrester according to any one of the above.

With this configuration, the horizontal ribs 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, there is an excellent effect that the vertical rib end face can be attached to the support arm made of an angled material facing downward.

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

According to the third aspect of the present invention, since the bolt for fastening the fastener to the substrate is inserted into the elongated hole formed in the substrate, the applicable dimensions of the angle material (particularly the length of the horizontal rib) ) Changes can be easily accommodated.
Further, since it is not necessary to remove the bolt when attaching and detaching the unit to and from the angle material, there is an excellent effect that the detachability of the attachment unit can be further improved.

[Brief description of the drawings]

FIG. 1 is a 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 where the mounting unit is mounted on an angle member.

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

FIG. 4 is a plan view showing a state in which the lightning arrester device is mounted on a support arm of a steel tower by a mounting unit.

FIG. 5 is a front view showing a state in which the lightning arrester device is mounted on a support arm of a steel tower by a mounting unit.

FIG. 6 is a front view showing a process when the mounting unit is mounted 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 where a conventional mounting unit is mounted on an angle member.

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

[Explanation of symbols]

11: substrate, 11b: long hole, 12: angle material forming a support arm of a tower, 12a: horizontal rib, 12b: vertical rib, 13: reinforcing plate, 14: J-bolt as a hook, 17: tightening Metal fittings, 18 bolts, 22 lightning arrester

Claims (3)

(57) [Claims] 1. A board which is arranged on the upper surface of a horizontal rib of an angle member constituting a support arm of a tower and supports a lightning arrester at a tip end side, and a hook which is fixed to a lower end portion of a vertical rib of the angle member. An attachment unit for a lightning arrester, comprising: a metal fitting; and a metal fitting provided on a base end side of the substrate and clamping a horizontal rib of an angle material in cooperation with the substrate by tightening a bolt. 2. The mounting unit for a lightning arrester according to claim 1, wherein a reinforcing plate is provided on a lower surface of the substrate so as to be in contact with the vertical rib of the angle member. 3. The mounting unit for a lightning arrester according to claim 1, wherein a bolt for fastening the fastener to the board is inserted into an elongated hole formed in the board.