JPH0633678Y2 - Lightning arrester - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a lightning protection device for a headstock or expansion joint provided in a building.

(Prior Art and Its Problems) Conventionally, as an example of a lightning arrester for protecting a building having a flat roof from a lightning strike, a ridge conductor is installed on a parapet that is provided around the roof, and the ridge conductor is used for lightning protection. It is performed to connect to the ground electrode by a conductor or the like.

1 (a) and 1 (b) show an example of such a ridge conductor. First, in FIG. 1 (a), the ridge conductor 1 is in close contact with the parapet 3 via the mounting hardware 2. Installed. The ridge-top conductor 1 is attached in close contact with the parapet 3 via the attachment hardware 2. A rectangular copper wire is usually used as the conductor on the ridge. In this case, only the part where the horizontal distance α from the on-building conductor 1 is 20 cm or less is practically the protection range to be protected from lightning strike. Further, in FIG. 1B, a parapet 3 is mounted on the parapet 3, and a ridge conductor 1'is mounted on the parapet 4 while maintaining a predetermined height. In this case, it is said that only the portion connecting the line connecting the outer end of the headstock 4 and the conductor 1 ′ and the line perpendicular to the conductor and forming an angle θ of 60 ° or less with the line is protected from lightning stroke. Therefore, the ridge-top conductor 1'also holds a predetermined height in consideration of this point.

However, in these conventional lightning arresters, the ridge conductor cannot be first provided in an arbitrary part of the parapet and must be installed in a part belonging to the protection range, so that the conductor installation position is complicated to be calculated. It takes time. In addition, an oxidation protection film of alumite, which is a poor conductor of electricity, is usually formed on the surface of a headstock made of aluminum or its alloy, but since these metals are originally both excellent conductors of electricity, Attaching a conductor to such a headstock would be more irrational in terms of material economy because it would be necessary to provide another conductor on top of a good conductor, which would cause a cost increase. In addition, since the above-building conductor is exposed on the parapets, umbrellas, etc.,
The appearance of the building is also damaged.

For this reason, as disclosed in, for example, Japanese Utility Model Laid-Open No. 56-43600, in view of forming one or more continuous loops on the parapet, a lightning protection device using the tree as a lightning conductor is proposed. It is also considered to be configured. However, this is one in which the connected wood members are connected by a special joint member, which is inferior in workability and complicates the work, and also breaks some joint members and loosens the fastening of the connecting portions. There was a defect that caused poor conductivity.

(Technical Problem of the Invention) The technical problem of the present invention is to solve the above-mentioned drawbacks and to propose a lightning arrester having excellent workability and conductivity.

(Means for Solving the Problems) A lightning arrester according to the present invention is a headlight or aluminum formed by continuously connecting long components of aluminum or its alloy along the longitudinal direction of parapets provided around the roof of a building. Or, in an expansion joint formed by continuously joining long components of the alloy along the roof facing portion of a building adjacent to each other, it is arranged between the back surface of the adjacent heading or expansion joint components and these members. It is characterized in that the surface of the drain joint is contacted so as to be able to conduct electricity to form a loop-shaped conductor on the building, and this conductor is connected to a ground electrode via a lightning conductor.

(Effect of the Invention) According to the above configuration, since the loop-shaped conductor can be configured by using the drain joint, the construction is easier than the conventional case where a lightning arrester is separately installed. The number of parts can be reduced. In addition, the contact area between the drainage joint and the head member or expansion joint constituent member is very large, so that contact failure hardly occurs.

In addition, the drain joint is a Kasaki or expansion
Since it is arranged on the back surface of the joint component,
The aesthetic appearance is not impaired, and since it is not directly exposed to wind and rain, it is less likely to corrode and the lightning protection effect can be maintained for a long time.

(Examples) Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First, in FIG. 2 (a), reference numeral 5 indicates a parapet. The parapet 5 is installed around the flat roof at the top of the building, and the prevention sheet 6 extends from the top to the inside of the building frame.
Is attached, and the end portion of the waterproof sheet 6 is end-treated by a caulking seal material 7. On top of the parapet 5, a headstock A is arranged via a headstock holder 8. The headstock holder 8 is a short member made of aluminum or its alloy and has locking portions 8a at both ends, and is screwed to the top of the parapet 5 at regular intervals. On the other hand, the headstock A is formed by connecting a plurality of long headwear members 9 (9 ') made of aluminum or an alloy thereof along the parapet. The head board member 9 includes a covering edge 9a that inclines downward toward the inside of the building body, a hanging edge 9b that hangs from both ends of the covering edge 9a, and a lock receiving portion provided on the back side of the lower end of the hanging edge 9b.
9c, which is pressed down from above the headstock holder 8 and elastically engages the engaging portion 8a of the holder 8 and the engaging portion 9c below the hanging edge 9b to cover the holder 8. Has been done. In addition, when the above-mentioned head member 9 (9 ') is connected, the end portion 9d of one head member and the end portion 9'd of the head member 9'adjacent thereto are connected via the drain joint 10. There is. The drain joint 10 has an outer shape that is substantially the same as the inner shape of the headstock member 9, and a drain groove 10a is formed on the upper surface thereof. One of the drain joints 10 is arranged on the back side of the one head member 9 and the other is arranged on the back side of the other head member 9 '. In this way, the head member 9 is provided on the parapet 5 and the drain joint
10 forms a continuous loop-shaped head tree A. However, this Kasaki A is not sufficiently conductive. This is because the headstock member 9 and the drainage joint 10 are usually anodized, and therefore the surface is covered with a protective film of an alumite coating, and the alumite coating is a poor conductor of electricity. This is because it is difficult to energize even when they are brought into contact with.

Therefore, after removing alumite from the contact surface between the headstock members 9 and 9'and the drain joint 10 to expose the bare metal, a connection compound (eg, "Jointal Z manufactured by Nikkei Kako Co., Ltd." )) Is applied and contact-connected via this. Since the connection compound contains mineral oil grease as a main component and metal particles for electric conduction, a friction enhancer, etc., it prevents corrosion of the contact surfaces of the headstock members 9 and 9'and the drain joint 10, and forms an oxide film. Has the effect of prevention,
Further, since the contact areas of these members 9, 9 ', 10 are large, they will not be broken by ordinary impact. Therefore, the adjacent tree members 9 and 9'are sufficiently conductively connected via the drain joint 10, and the tree tree A provided around the roof can be configured as a loop-shaped lightning conductor.

The drain joint 10 'connecting the two head members 9 and 9'is provided with a central portion 10'a as shown in FIG. 2 (b).
Is formed in a corrugated shape or a bellows shape, and after removing the alumite coating from the screwed portion 10'b or the welded portion, screwing is also performed on the back surface of the Kasaki member 9 (9 ') from which the alumite coating has also been removed via a connection compound. Alternatively, it is preferably fixed by welding.

With the above configuration, the central portion of the drain joint 10 '
Waveforms or bellows portions of 10'a are adjacent to each other.
Is very convenient because it has a function as a guide for the rainwater that guides the rainwater that has entered through the gap between the headstock members 9 and 9'to the outside of the headstock.

Next, the above-mentioned head board A is grounded to the ground electrode through the lightning conductor. In this case, for example, as shown in FIG. 3, one end of the lightning conductor 16 is connected to the connection terminal 17, and the connection terminal 17 is attached to the outer surface of the outer hanging edge 9b of the building frame of the headstock A, which is configured as a conductor. You can fasten by. In this case as well, the contact surface between the connection terminal 17 and the hanging edge 9b is joined through the connection compound after the alumite film removal treatment. Lightning conductor
16 hangs along the outer surface of the building frame, and the other end is connected to the building's steel frame, rebar, etc. These steel frames and reinforcing bars are directly connected to the ground electrode. According to this structure, the lightning conductor wire can be attached very easily, and thus the workability is excellent. Moreover,
The conductor is safe because it is arranged along the outer surface of the building frame.

Further, as shown in FIG. 4, the connection terminal 17 may be fixed to the outer surface of the hanging edge 9b on the inner side of the building body of the headstock A configured as a lightning conductor by a bolt 18. Also in this case both members 1
Anodizing film removal treatment is applied to the fastening surface of 7 and 9b, and it is also fastened via a connecting compound. A cutout groove 19 is provided in the vicinity of the connection terminal mounting portion of the headstock A, and the lightning conductor 16 connected to the connection terminal 17 is guided to the inside of the headboard A through the cutout groove, and further from the top of the parapet 5 to the inside of the parapet 5. It is embedded and connected to the steel pole or main reinforcement of the building, and connected to the grounding electrode through these steel poles and main reinforcement. With this configuration, since the connection terminal 17 is attached to the inside of the building body, the installation work is easy, and since the lightning conductor 16 is immediately guided from the vicinity of the connection terminal 17 to the back side of the headstock, it does not affect the human body. It is preferable for safety, and the conductor 16 is connected to the ground electrode through the inside of the parapet 5 and is not exposed to the outside of the body. Therefore, there is no possibility of causing an accident such as disconnection due to insufficient external force.

When the connection terminal 17 is mounted inside the building body as described above, it is preferable to cover the terminal 17 with the box-shaped cover member 20 made of aluminum or the like.

In addition, as shown in FIG. 5, a parallel cut 21 is made in a part of the inside of the building frame of the headstock member 9, a headboard part 22 sandwiched by the notch 21 is projected, and this protruding hanging edge 22
A space sufficient to accommodate the terminal boss 17a of the connection terminal 17 is provided on the back side of a, and the connection terminal 17 is easily attached to the back side of the hanging edge 22a by projecting a part of the hanging edge 9b in this manner. Good.

Further, as shown in FIG. 6, one end 23a of the angled connecting plate 23 is screwed or welded to the back side of the hanging edge 9b of the head member 9 and the other end 23b of the connecting plate 23 is attached to the building of the head member 9. It may be formed so as to rise vertically on the back side on the outside of the body, and the connection terminal 17 may be screwed or welded and fixed to the other end. In a normal case, there is no room for accommodating the terminal boss of the connection terminal 17 between the hanging edge 9b of the headstock member 9 and the parapet side wall, but the covering edge 9a of the headboard member 9 has an outer portion of the building frame more than an inner portion. It is configured at a high position, that is, as a downward slope toward the inside of the skeleton, whereas the top of the parapet is horizontal, so between the outer edge of the skeleton 9a of the head member 9 and the top of the parapet. Has a space for accommodating the terminal boss of the connection terminal 17. In the case of this example, the connection terminal 17 is arranged on the back side of the head member 9 using this space, and when connecting the terminal 17, first, the connection plate 23
The connection terminal is fixed to the end portion 23b of the connection terminal, and after the head member is attached from above, the other end portion 23 of the connection plate 23 is attached to the hanging edge 9b.
Fix a. The lightning conductor 16 connected to the connection terminal 17 is embedded in the parapet and has one end connected to the ground electrode. It is sufficient that the connection plate 23 is made of an aluminum plate, and it is needless to say that the connection parts are connected to each other by applying the connection compound after removing the alumite coating as described above when connecting the both ends.

When the connecting terminal is arranged between the cover edge 9a of the head member 9 and the top of the parapet in this way, the connecting terminal can be protected from wind and rain and insufficient external force without performing special processing on the head member. It is also preferable in terms of appearance because there is no noticeable protrusion on the outside of the head tree.

When arranging the connection terminals on the back side of the headstock, as shown by the dotted line in FIG. 6, the connection terminal accommodating recess 24 is formed in a part of the inner wall of the parapet, and the headboard member is directly or directly connected to the connection board. It is also possible to adopt a configuration in which the connection terminal connected via the above is accommodated in this recess.

As described above, the headstock members connected in a loop on the parapet of the building structure are connected in a conductive manner, and the headstock itself is configured as a lightning conductor on the ridge, and this conductor is connected to the ground pole via the lightning conductor. I connected it, so I have an independent lightning rod, an overhead ground wire,
Lightning protection can be achieved without providing a conductor on the ridge.

Next, FIG. 7 shows an example in which the expansion joint B is configured as a lightning conductor. An expansion joint is often provided between adjacent buildings, and the expansion joint is usually made of a constituent member such as aluminum or an alloy thereof like the above-mentioned headstock, and is arranged on the parapet. Unlike the above-mentioned expansion tree, such an expansion joint is rarely installed around a building by itself, but it can form a loop together with the expansion tree. For example, by forming an expansion joint between a tree-shaped head tree formed in a loop on one building and a tree-shaped head tree formed in a loop on a building adjacent to the same, the expansion joints are connected in succession to each other. It is possible to construct one loop-shaped headstock.

Therefore, an example of the expansion joint will be described. In the figure, a and a'represent parapets of adjacent buildings. A long support member 25 is provided at the top end of each of the parapets a and a ', and a joint holder 26 is erected on the support member 25, and a joint cover 27 is fitted over the holder 26. Covers the gap between the parapets a and a '. Parapet a,
A headstock member 29 is arranged on a'via a headstock holder 28. The support member 25 has a locking projection 25a and a fitting groove 25b of the airtight material 30 on the upper part thereof, and a locking groove 25c is formed on the other top end side of the parapet, while a rubber or It is formed by forming a fitting groove 25d of a water blocking plate 31 made of synthetic resin, and is screwed to a parapet. The joint holder 26 is erected and supported on the support members 25, 25 by locking the end portion of the spring member 33, which is short and fixed to the lower portion thereof, to the locking projection 25a of the support member 25. Therefore, even if the building frame is relatively displaced due to a vibration or the like, it can respond to this displacement. Locking parts 26 are provided on both sides of the joint holder 26.
On the other hand, while a is formed, lock receiving portions 27b are formed below the hanging edges 27a at both ends of the cover material 27, and the cover material 27 is pressed down from above the joint holder 26 so that the joint
The locking portion 26a of the holder 26 and the cover material locking receiving portion 27b are elastically locked to be fitted over the support members 25, 25. The headstock holder 28 is short and has a locking portion 28a at one end, and is fixed by screws on the parapets a and a '. On the other hand, the Kasaki member 29 has a standing portion 29a on one side.
And a hanging edge 29b provided with a lock receiving portion 29c on the other side, and the rising portion 29a is provided with the locking groove 25c of the support member 25.
On the other hand, the locking receiving portion 29c of the hanging edge 29b is locked to the locking portion 28a of the headstock holder 28 so as to be locked and fixed on the parapets a and a '. As described above, the expansion joint B is arranged along the parapet by connecting the long supporting member 25, the cover member 27, and the head member 29 which are all made of aluminum or an alloy thereof. Therefore, a drain joint (not shown) is provided at the joint portion of the members 25, 27, 29 as in the case of the headstock.

The expansion joint B having the above-mentioned configuration is connected to the above-mentioned headstock A at both ends thereof. Similar to the above-mentioned Kasaki A, this expansion joint B does not mean that the adjacent long cover material 27, support member 25, Kasaki member 29, etc. are connected in a conductive state. The joint 10 'itself may be screwed or welded to both cover members. Also, when connecting the support member 25 and the head member 29 which are adjacent to each other, the drain joint 10 'may be used in the same manner as described above. When connecting the expansion joint component and the drainage joint, after the alumite is removed from each other as described above, the surfaces to which the connection compound is applied are brought into contact and fixed by screwing or welding.

With the above configuration, the expansion joint also becomes a conductor that is continuous in a loop along the parapet together with the parapet headstock. Next, when connecting a lightning conductor to the expansion joint,
A connection terminal (not shown) connected to one end of 34 is conductively screwed or welded to the cover material 27, support member 25 or head member 29 of the expansion joint B, and the conductor 34 is connected between both buildings. It may be suspended along the gap, and the other end may be connected directly to the grounding electrode or to the steel frame or rebar of the building.

As described in detail above, the lightning arrester according to the present invention is a cap tree or aluminum or its alloy formed by continuously connecting long components of aluminum or its alloy along the longitudinal direction of parapets provided around the roof of a building. In the expansion joint formed by joining the long constituent members of the above along the roof facing part of the adjacent building, the back surface of the adjacent Kasaki or expansion joint constituent members and the drain joints arranged between these members. A loop-shaped conductor is formed on the building by contacting the surface with electricity so that the conductor can be connected to a ground electrode via a lightning conductor.

In this way, since the loop-shaped conductor can be constructed using the drain joint, the construction is easier and the number of parts can be reduced compared to the case where the lightning arrester is grounded separately as in the conventional case. You can In addition, the contact area between the drainage joint and the head member or expansion joint constituent member is very large, so that contact failure hardly occurs.

In addition, the drain joint is a Kasaki or expansion
Since it is arranged on the back surface of the joint constituent member, its aesthetic appearance is not impaired, and since it is not directly exposed to wind and rain, it is less likely to corrode and the lightning protection effect can be maintained for a long time.

[Brief description of drawings]

1 (a) and 1 (b) are sectional views showing a conventional on-building conductor,
2 (a) and 2 (b) are perspective views showing a structure of a parapet cap tree, and FIGS. 3 to 6 are explanatory views showing a connection mode between a conductor and a lightning conductor in the lightning arrester. FIG. 1 is a cross-sectional view showing the structure of an expansion joint, the arrangement of connecting members, and the manner of connecting lightning conductors. Reference A ... Draining Kasaki, B ... Expansion joint, 1 ... Building conductor, 2 ... Mounting hardware, 3, 5 ... Parapet, 4 ... Draining Kasaki, 8 ... Kasagi holder, 9 ...
… Drainer Kasaki member, 10 …… Joint plate, 17 …… Current connection terminal, 16 …… Conducting wire, 20 …… Cover material, 25 …… Supporting member,
26 …… Joint holder, 27 …… Joint cover, 28 …… Kasagi holder, 29 …… Misakiri Kasaki, 34 …… Conductor wire

Claims (1)

[Scope of utility model registration request] 1. A headstock formed by continuously connecting long components of aluminum or an alloy thereof along a longitudinal direction of a parapet provided around a roof of a building, or a long component of aluminum or an alloy thereof is close to each other. In an expansion joint that is installed along the roof facing part of the building, make the back surface of the adjacent wood or expansion joint constituent member and the surface of the drainage joint arranged between these members electrically contactable. A lightning arrester characterized in that a loop-shaped conductor is formed on the building and the conductor is connected to a ground electrode via a lightning conductor.