JPH10112397A - Lightening arresting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a lightening current from flowing a set body, prevent a situation which causes electromagnetic induction or inductive lightening with electric, communication wiring, facility duct, pipes, or the like laid along the set body, and attain suppression of adverse influence on electronic equipment or the like electrically connected by insulating a lightening reception part against the set body and supporting it by lightening reception insulation and supporting means and insulating a lightening arresting lead wire against the set body by lead wire part insulating means. SOLUTION: A lightening reception part 1 of this lightening arresting device is provided at a set body 1 and is subjected to lightening shock. A lightening arresting lead wire 2 is connected to a lightening reception part 1 at one end and flows a lightening current from the lightening reception part 1. A grounding electrode part 3 is constituted by a grounding copper plate or the like to which the other end of the lightening arresting lead wire 2 is connected and is embedded underground. Lightening reception part insulating and supporting means 20 insulates and supports the lightening reception part 1 against the set body T, and lead wire part insulating means 40 is provided at the lightening arresting lead wire 2 and insulates the wire 2 against the set body T.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightning arrester provided on an installation object such as a building and receiving lightning strikes from direct lightning strikes, side lightning strikes, guided lightning strikes, intruding lightning strikes, etc. To a lightning arrester that performs

[0002]

2. Description of the Related Art Conventionally, as this type of lightning arrester, for example, as shown in FIG. 8, a lightning receiving unit 1 provided on an installation target T such as a building to receive a lightning strike, and one end provided on the lightning receiving unit 1 side. And a lightning conductor 2 for passing a lightning current from the lightning receiver 1 and a grounding pole 3 connected to the other end of the lightning conductor 2 and buried in the ground. The lightning receiving part 1 has a barbed part,
It is supported by a support rod 4 made of metal, for example, as shown in FIG.
As shown in FIG. 2, in the self-standing type, the support rod 4 is fixed to a flat portion of the installation target T via a metal support base 5. Since the support rod 4 and the support base 5 are designed by wind pressure load calculation based on the Building Standard Law, they are made of metal from the viewpoint of strength. Further, for example, as shown in FIG. 9B, in the side type, the support rod 4 is fixed to the vertical surface of the installation target T via a metal fitting 6.

[0003]

By the way, in such a conventional lightning arrester, the support rod 4, the support base 5, the mounting bracket 6, and the lightning arrester 2 of the lightning receiver 1 are made of a metal conductor. Therefore, when the object T comes into contact with the object T and the object T includes a conductive portion such as a metal, the object T is electrically connected. Therefore, a lightning current flows through the object T. For example, electromagnetic induction and dielectric lightning may occur in electricity, communication wiring, building equipment ducts and pipes laid along the installation target T, thereby adversely affecting electrically connected electronic devices and the like. Had the problem that Especially,
In recent years, with the rapid spread of computers and the like, the influence of lightning has become a serious problem.

The present invention has been made in view of the above-mentioned problems, and is a lightning arrester capable of preventing a lightning current from flowing to an installation target and preventing electromagnetic induction and dielectric lightning through the installation target. The purpose is to provide.

[0005]

In order to achieve the above object, a lightning arrester according to the present invention is provided with a lightning receiving unit provided on an installation target such as a building for receiving a lightning strike, and one end connected to the lightning receiving unit. A lightning arrester having a lightning arrester conducting the lightning current from the lightning arrester and a grounding pole connected to the other end of the lightning arrester and buried in the ground. The lightning-receiving part is insulated and supported by the lightning conductor, and the conductor insulation part is provided on the lightning conductor and insulated from the installation target. With this configuration, the lightning receiving part is insulated and supported by the lightning receiving part insulating support means with respect to the object to be installed, and the lightning arresting wire is insulated from the object to be installed by the conductor part insulating means. Since lightning current stops flowing, for example, electricity laid along the installation object,
This prevents electromagnetic induction or dielectric lightning from occurring in communication wiring, building equipment ducts, piping, and the like, and suppresses adverse effects on electronic devices and the like that are electrically connected.

[0006] If necessary, the lightning-receiving part insulating support means may include a supporting rod for supporting the lightning-receiving part, a base fixed to a plane portion of the installation target and supporting the supporting rod, And an insulating block formed of an insulating material and interposed between the lower end of the support rod. In this case, it is effective to provide a pipe made of an insulating material which is erected on the base and into which the support rod is inserted and held. Also. It is effective to provide an insulating interposition material interposed between the pipe and the support rod as required. Furthermore, if necessary, an outer pipe formed to be larger in diameter than the pipe and erected on the base coaxially with the pipe,
It is effective to provide an insulating filler filled between the outer pipe and the pipe. In addition, it is effective to provide a bridging member provided between the outer pipe and the pipe outside the outer pipe and the pipe as necessary.

[0007] If necessary, the lightning-receiving part insulating support means may include a supporting rod for supporting the lightning-receiving part, a fixing part fixed to a vertical surface of the installation target, and a holding part for holding the supporting rod. , And an insulating sandwiching member sandwiched between the holding portion of the mounting bracket and the support rod. Further, if necessary, the conductor insulation unit is made of an insulating covering material for covering the lightning conductor.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a lightning arrester according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Note that the same components as described above are denoted by the same reference numerals and described. 1 to 4 show a lightning arrester according to a first embodiment. The basic configuration of the lightning arrester according to this embodiment includes a lightning receiving unit 1 provided on an installation target T such as a building and receiving a lightning strike, a lightning current from the lightning receiving unit 1 having one end connected to the lightning receiving unit 1. And a ground pole 3 made of a grounded copper plate or the like and connected to the other end of the lightning conductor 2 and buried in the ground. Further, the lightning receiving unit 1 is attached to the installation target T.
Lightning-receiving part insulating support means 20 for insulating and supporting the light-receiving part;
A conductor insulation unit 40 is provided on the lightning conductor 2 to insulate the lightning conductor 2 from the installation target T.

[0009] The lightning receiving part 1 is disclosed in, for example, Japanese Patent No. 251943.
As shown in FIG. 2, a well-known type disclosed in Japanese Patent Publication No. 3 is used, which includes a rod 10 having a tip 11 at a tip thereof and a housing 1 provided at an intermediate portion of the rod 10.
2, a radial discharge electrode 13 fixed to the housing 12 so as to be electrically insulated from the spike 11, and disposed in close proximity to the spike 11, and radially provided insulated from the housing 12 to collect atmospheric electricity A tap member 14 and a discharge circuit (not shown) which is provided inside the housing 12 and stores electricity by power supply from the tap member 14 and discharges the discharge electrode 13 are provided. Is ionized so that lightning can be received more reliably. At the lower end of the rod 10,
An external thread 15 is formed.

As shown in FIG. 1, the lightning-receiving part insulating support means 20 is a so-called self-supporting type support means, and is provided on a flat portion such as a roof or a roof of a building as the object T to be installed. I have. The light-receiving part insulating support means 20 is shown in FIGS.
As shown in FIG.
It has. An insulating resin 22 such as an epoxy resin or polyacetal is applied to the surface of the support rod 21. As shown in FIG. 2, a female screw 23 is formed at the upper end of the support rod 21, and the male screw 15 formed on the rod 10 of the lightning receiver 1 is screwed to support the rod 10. . Reference numeral 16 denotes a lock nut for locking the rod 10.

The lightning receiving part insulating support means 20 is fixed to the flat part of the installation target T and supports the support rod 21.
4 and an insulating block 25 formed of an insulating material interposed between the base 24 and the lower end of the support rod 21. The insulating block 25 is formed of, for example, epoxy resin and has the same diameter as the support rod 21. Reference numeral 26 denotes a metal spacer interposed between the insulating block 25 and the base 24. The base 24 is fixed to the installation target T by an anchor bolt 28. Further, there is provided a pipe 30 made of an insulating material, which is erected on the base 24 and into which the support rod 21 is inserted and supported. This pipe 30
Is formed of, for example, a resin such as hard polyethylene or vinyl. Further, as shown in FIG. 4, an insulating intervening material 31 is interposed between the pipe 30 and the support rod 21. The interposition material 31 is made of, for example, epoxy resin, and is applied in a flowing state to the support rod 21 when the support rod 21 is inserted into the pipe 30, and is interposed by inserting the support rod 21.

Further, the lightning receiving section insulating support means 20 is provided on the base 24 and has an outer tube 32 having a diameter larger than the pipe 30 and standing upright on the base 24 coaxially with the pipe 30. And an insulating filler material 33 filled between them. As the outer tube 32, for example, a steel tube lined with polyethylene is used. As the filler 33, for example, concrete or mortar is used. Reference numeral 34 denotes a coating resin such as an epoxy resin applied to the upper end surfaces of the outer tube 32 and the filler 33.

As shown in FIG. 4, a bridging member formed of a metal rod is provided between the outer tube 32 and the pipe 30 via a fixing member 35 outside the outer tube 32 and the pipe 30. 36 are provided. Fixing member 3 for outer tube 32
Reference numeral 5 denotes a pair of clamping members 35a having a semicircular cross section for clamping the outer tube 32. The projecting pieces 35b connected to the left and right of the clamping member 35a are fastened to each other by bolts 37 and nuts 38 for mounting. Have been. On the other hand, pipe 3
Similarly, the fixing member 35 is also constituted by a pair of holding members 35a having a semicircular cross section for holding the pipe 30. Bolts 37 and nuts 38 connect the protruding pieces 35b provided to the left and right of the holding member 35a. It is attached by tightening with. The erection member 36 is connected to the upper and lower fixing members 3.
The left and right pairs are fixed by welding or the like between the five projecting pieces 35b.

As shown in FIG. 2, the conductor insulation 40 is made of an insulating covering material 41 for covering the lightning conductor 2. The covering material 41 is formed of a soft resin such as vinyl. One end of the lightning conductor 2 is exposed from the covering material 41, and is attached via a mounting terminal 42 to the tip of the support rod 21 so as to be in a conductive state with the rod 10. Moreover, as shown in FIG.
1 and is fixed to the support rod 21 and the installation target T by a stopper 43.

Therefore, when the lightning arrester according to this embodiment is installed on the installation target T, the outer tube 32 is fixed to the base 24 by welding or the like in advance in the lightning-receiving part insulating support means 20, and the outer tube 32 is fixed. The pipe 30 is erected in the pipe 32 and the filler 3
3 and the pipe 30 is fixed to the outer pipe 32 and the base 24. Further, the bridging member 36 is attached with a bolt 37 and a nut 38 via a fixing member 35. Further, a spacer 26 coated with an epoxy resin is inserted into the pipe 30, and an epoxy resin is injected and solidified thereon to form an insulating block 25.

When the lightning arrester is to be installed on the installation target T, a base 24 made in advance is placed on the flat surface of the installation target T, and the base 24 is attached to the anchor bolt 28.
Fix with etc. Then, the rod 10 of the lightning receiving section 1 is screwed into the support rod 21 and locked with the lock nut 16, epoxy resin is applied to the support rod 21, and the support rod 21 is inserted into the pipe 30. The lower end of the support rod 21 is brought into contact with the insulating block 25. In a state where the epoxy resin is solidified, the solidified epoxy resin is interposed between the pipe 30 and the support rod 21 as an insulating intervening material 31. On the other hand, the ground electrode portion 3 is buried in the ground at a required position near the installation target T. And in this state,
The lightning conductor 2 covered with the covering material 41 is disposed vertically outside the object T to be installed, and is fixed by a stopper 43. Further, one end of the lightning conductor 2 is connected to the upper end of the support rod 21 via the mounting terminal 42. In this case, the insulating resin 22 of the support rod 21 is peeled off to make the rod 10 of the lightning receiving section 1 conductive. In addition, the other end of the lightning conductor 2 is connected to the ground pole 3.

In this state, when the lightning unit 1 receives lightning, the lightning current is grounded to the grounding pole unit 3 through the lightning unit 1 and the lightning conductor 2. In this case, the support rod 21 of the lightning receiving unit 1 is insulated and supported by the lightning receiving unit insulating support means 20, and the lightning arresting wire 2 is covered by the covering material 41, which is the wire insulating means 40. It is insulated from the installation body T,
Therefore, a lightning current does not flow through the installation target T, so that electromagnetic induction or dielectric lightning caused by the installation target T is less likely to occur, and the effect on electronic devices and the like is suppressed. In particular, the lightning-receiving part insulating support means 20 includes the base 24 and the support rod 2.
Insulation block 2 with spacer 26 between it and lower end of
5, the insulating block 25
The lightning current flowing through the support rod 21 is interrupted without being transmitted to the installation target T, and the lightning current stops flowing through the installation target T. Therefore, electromagnetic induction due to the installation target T is less likely to occur.

Further, since the support rod 21 is covered with the pipe 30 formed of an insulating material, the transmission of the lightning current flowing through the support rod 21 to the installation target T is surely cut off. Lightning current can be reliably prevented from flowing through the body T, and occurrence of electromagnetic induction or the like due to the installation target T can be reliably suppressed. In addition, since it is covered and supported by the pipe 30, the mechanical strength is increased and the support is ensured. Furthermore, since the interposition material 31 is interposed between the pipe 30 and the support rod 21, the insulation between the support rod 21 and the pipe 30 is further ensured by the interposition material 31, and the support rod 21 The transmission of the lightning current flowing through the object T to the installation target T is reliably blocked, the lightning current can be prevented from flowing through the installation target T, and the occurrence of electromagnetic induction or the like caused by the installation target T is ensured. Can be deterred.

Further, since the insulating filler material 33 is filled between the outer tube 32 and the pipe 30, the insulation between the support rod 21 and the pipe 30 is further ensured by the filler material 33. The transmission of the lightning current flowing through the support rod 21 to the installation target T is reliably blocked, and the lightning current can be prevented from flowing through the installation target T, and electromagnetic induction or the like caused by the installation target T can be prevented. Can be reliably suppressed. Further, the outer pipe 32 and the filler 33 cause the pipe 3
The center of gravity is located at the lower end, and the mechanical strength is increased to stabilize the support, and the support rod 21 is stably held against the influence of wind and the like. A bridging member 36 is provided between the outer tube 32 and the pipe 30 outside the outer tube 32 and the pipe 30.
In this respect, the mechanical strength of the pipe 30 is increased, the support is assured, and the installation stability is increased.

FIGS. 5A and 5B show a lightning arrester according to a second embodiment. The lightning arrester according to this embodiment is formed in the same manner as in the first embodiment, but differs from the first embodiment in the configuration of the lightning-receiving part insulating support means 20. As shown in FIG. 5 (a), this is a so-called side-type type support means, which is provided on a vertical portion such as an outer wall of a building as the installation target T. The lightning receiving part insulating support means 20 includes a metal supporting rod 21 similar to the above, which supports the lightning receiving part 1. The surface of the support rod 21 is coated with an insulating resin 22 such as polyacetal. Further, a female screw is formed at the upper end of the support rod 21, and the male screw 15 formed on the rod 10 of the lightning receiving unit 1 is screwed to support the rod 10.

The lightning-receiving part insulating support means 20 is a mounting bracket 50 having a flange-shaped fixing part 51 fixed to the vertical surface of the installation target T and a ring-shaped holding part 52 for holding the support rod 21. And an insulating sandwiching member 53 sandwiched between the holding portion of the mounting bracket and the support rod 21. The mounting bracket 50 is fixed to the installation target T with an anchor bolt 54 in the fixing portion 51. The sandwiching member 53 is formed of a resin material such as an insulating resin or rubber that is applied and solidifies, such as polyacetal.

Therefore, also in the second embodiment, when the lightning unit 1 receives lightning, the lightning current is grounded to the ground pole unit 3 through the lightning unit 1 and the lightning conductor 2. In this case, the supporting rod 21 of the lightning receiving unit 1 is
The lightning conductor 2 is insulated from the installation target T because the lightning conductor 2 is covered with the coating material 41 that is the conductor insulation unit 40, so that the lightning current flows through the installation target T. Therefore, the installation target T
This makes it difficult for electromagnetic induction and dielectric lightning to occur, thereby suppressing the effects on electronic devices and the like. In particular, since the lightning receiving part insulating support means 20 includes the insulating sandwiching member 53, the lightning current flowing through the support rod 21 is interrupted by the sandwiching member 53 without being transmitted to the installation target T. Since lightning current does not flow through the installation target T, electromagnetic induction due to the installation target T is less likely to occur.

FIG. 6 shows another example of the installation target T to which the lightning arrester according to the second embodiment is attached. The installation object T is erected on the ground 10 to 30 m.
The supporting rod 21 is attached to the tip of the tower via a mounting bracket 50. This mounting bracket 5
An insulating sandwiching material is sandwiched between the support rod 21 and the support rod 21.

FIG. 7 shows a lightning arrester according to a third embodiment. The lightning arrester according to this embodiment is formed in the same manner as in the first embodiment, but differs from the first embodiment in the configuration of the lightning-receiving part insulating support means 20. The lightning receiving unit insulating support means 20 is a so-called self-supporting type support means, and is provided on a flat surface such as a roof or a roof of a building as the installation target T. The lightning-receiving part insulating support means 20 includes a metal supporting rod 21 for supporting the lightning-receiving part 1.
It has. The surface of the support rod 21 is coated with an insulating resin such as an epoxy resin or polyacetal. The lightning receiving part 1 is supported on the upper end of the support rod 21.

Further, the lightning receiving part insulating support means 20 is fixed to the flat part of the installation target T and supports the support rod 21.
1 is provided. An insulating block 6 made of an insulating material is provided between the base 24 and the lower end of the support rod 21 via a mounting body 62 and a spacer 63.
0 is provided. The insulating block 60 is formed of, for example, epoxy resin and has the same diameter as the support rod 21, is exposed to the outside, and is connected between the support rod 21 and the spacer 63 by fitting or the like. Reference numeral 64 denotes a wire for supporting the support rod 21, and an insulating ball insulator 65 is interposed therebetween. Therefore, also in the third embodiment, when the lightning unit 1 receives lightning, the lightning current is reduced to the lightning unit 1 and the lightning conductor 2.
(Not shown) and grounded to a ground pole (not shown). In this case, the support rod 21 of the lightning receiving unit 1 is insulated and supported by the insulating block 60 of the lightning receiving unit insulating support means 20, and the lightning arresting wire is covered by the conductive wire insulating means. Is insulated from the
Since lightning current does not flow through the installation target T, electromagnetic induction and dielectric lightning caused by the installation target T are less likely to occur, and the effect on electronic devices and the like is suppressed.

In the above-described embodiment, the configuration of the lightning receiving section 1 is not limited to the above-described one. No problem. Further, a so-called raised conductor which is stretched in a loop on a mound, a parapet, a roof or the like may be used.
May be covered with an insulating covering material and supported. Further, the configuration of the lightning-receiving part insulating support means 20 is not limited to the above.

[0027]

As described above, according to the lightning arrester of the present invention, the lightning arrester is insulated and supported from the object to be installed by the lightning arrester insulating support means, and the lightning arrestor is provided by the conductor insulation means. Since the conducting wire is insulated from the installation target, lightning current does not flow through the installation target, so electromagnetic induction is applied to, for example, electricity and communication wiring laid along the installation target, building equipment ducts and piping, etc. This can prevent a situation that causes electrical shock or dielectric lightning, thereby suppressing a situation that adversely affects electronic devices and the like that are electrically connected.

In the case where the lightning-receiving part insulating support means is provided with an insulating block made of an insulating material interposed between a supporting rod supporting the lightning-receiving part and a base supporting the supporting rod, As a result, the transmission of the lightning current flowing through the support rod to the installation target is interrupted, and the lightning current stops flowing through the installation target, so that it is possible to prevent a situation where electromagnetic induction or dielectric lightning caused by the installation target is generated. In addition, the influence on electronic devices and the like can be suppressed. In particular, it is effective for a self-standing type installation. In this case, when the supporting rod is held by a pipe formed of an insulating material, the supporting rod is covered by the pipe, so that the transmission of the lightning current flowing through the supporting rod to the installation target is surely interrupted. Thus, the occurrence of electromagnetic induction or the like due to the installation target can be reliably suppressed. Also,
Since it is supported by being covered with the pipe, the support of the support rod can be ensured accordingly.

In this case, when an insulating interposition material is interposed between the pipe and the support rod, the insulation between the support rod and the pipe is further ensured by the interposition material. Lightning current flowing through the support rod can be reliably cut off, and the occurrence of electromagnetic induction or the like due to the installation target can be more reliably suppressed. Furthermore, when a filler is filled between the outer pipe and the pipe, the filler further ensures the insulation between the support rod and the pipe, and the lightning current flowing through the support rod is more reliably blocked. Therefore, generation of electromagnetic induction or the like due to the installation target can be more reliably suppressed. Furthermore, when an erect member is installed between the outer tube and the pipe outside the outer tube and the pipe, the pipe is reliably supported, and the installation stability of the device can be increased.

Further, the lightning-receiving part insulating support means includes a support rod for supporting the lightning-receiving part, a fixing part fixed to the vertical surface of the installation object, and a mounting bracket having a holding part for holding the support rod.
In the case where an insulating sandwiching member sandwiched between the holding portion of the mounting bracket and the supporting rod is provided, transmission of the lightning current flowing through the supporting rod to the installation target by the sandwiching member. Is cut off, and lightning current stops flowing through the installation target, so that it is possible to prevent a situation in which electromagnetic induction or dielectric lightning caused by the installation target occurs, and it is possible to suppress the influence on electronic devices and the like. In particular, it is effective for installation of a side type.

In the case where the conductor insulation unit is made of an insulating covering material for covering the lightning conductor, the transmission of the lightning current from the lightning conductor to the installation target is interrupted by the covering material. Since lightning current does not flow through the body, it is possible to prevent electromagnetic induction or dielectric lightning caused by the installation target, and to suppress effects on electronic devices and the like.

[Brief description of the drawings]

FIG. 1 is an overall view showing a lightning arrester according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a main part of a lightning receiving unit and a lightning receiving unit insulating support means of the lightning arrester according to the first embodiment of the present invention.

FIG. 3 is a partial perspective view showing a main part of a lightning receiving unit insulating support means of the lightning arrester according to the first embodiment of the present invention.

FIGS. 4A and 4B are cross-sectional views showing a lightning-receiving part insulating support means of the lightning arrester according to the first embodiment of the present invention, wherein FIG. 4A is a front cross-sectional view, and FIG. It is an X-ray transverse sectional view.

FIGS. 5A and 5B are views showing a lightning receiving part insulating support means of the lightning arrester according to the second embodiment of the present invention, wherein FIG. 5A shows an attached state, and FIG. FIG. 3 is a diagram illustrating a configuration.

FIG. 6 is a diagram showing a lightning-receiving part insulating support means of a lightning arrester according to a second embodiment of the present invention, showing a state of attachment to another installation target.

FIG. 7 is a view showing a lightning receiving unit insulating support means of a lightning arrester according to a third embodiment of the present invention.

FIG. 8 is a diagram showing a problem of a conventional lightning arrester.

FIG. 9 is a view showing a mounting mode of the lightning arrester, and FIG.
FIG. 4 is a diagram showing a self-standing type mounting state, and FIG. 4B is a diagram showing a side type mounting state.

[Explanation of symbols]

 T Installation target 1 Light receiving part 2 Lightning conductor 3 Grounding pole part 10 Rod 15 Male screw 20 Light receiving part insulating support means 21 Support rod 22 Insulating resin 23 Female screw 24 Base 25 Insulating block 26 Spacer 28 Anchor bolt 30 Pipe 31 Intermediate material 32 Outer tube 33 Filler 35 Fixing member 36 Bridge member 40 Conductor insulating means 41 Coating material 42 Mounting terminal 43 Clamp 50 Mounting bracket 51 Fixed portion 52 Holding portion 53 Clamping material 60 Insulation block 61 Base 62 Mounting body 63 Spacer 64 Wire 65 Ball insulator

Claims (8)

[Claims] 1. A lightning receiving part provided on an object to be installed such as a building to receive a lightning strike, a lightning conductor having one end connected to the lightning receiving part for flowing a lightning current from the lightning receiving part, and the other end of the lightning conducting wire A lightning arrester provided with a lightning arrester insulating support means for insulating and supporting the lightning arrester with respect to an object to be installed, and a lightning arrester conducting wire. A lightning arrester characterized by comprising a conductor insulation means for insulated from an installation object. 2. The lightning-receiving part insulating support means includes: a supporting rod for supporting the lightning-receiving part; a base fixed to a plane portion of the installation target and supporting the supporting rod; 2. The lightning arrester according to claim 1, further comprising an insulating block formed of an insulating material interposed between the lower end and the insulating block. 3. The lightning arrester according to claim 2, further comprising a pipe formed of an insulating material which is erected on the base and into which the support rod is inserted and held. 4. The lightning arrester according to claim 3, further comprising an insulating material interposed between the pipe and the support rod. 5. An outer pipe formed to be larger in diameter than the pipe and erected on the base coaxially with the pipe, and an insulating filler filled between the outer pipe and the pipe. The lightning arrester according to claim 3 or 4, wherein the lightning arrester is configured as follows. 6. The lightning arrester according to claim 5, further comprising an erect member provided between said outer tube and said pipe outside said outer tube and said pipe. 7. The light receiving part insulating support means is provided with a supporting rod for supporting the light receiving part, a fixing part fixed to a vertical surface of the installation object, and a holding part for holding the supporting rod. 2. The lightning arrester according to claim 1, further comprising a metal fitting, and an insulating material sandwiched between the holding portion of the mounting metal and the support rod. 8. The lightning arrester according to claim 1, wherein said conductor insulation means is formed of an insulating covering material for covering said lightning conductor.