JPH034104Y2 - - Google Patents

Description

[Detailed explanation of the invention] <Industrial application field> This invention is a lightning rod equipment that is installed along the roof of a building or the wall of a tower built on the roof of a building, and a grounding rod that is buried underground. It is used when arranging a lightning conductor that conductively connects the lightning conductor to the pole. Specifically, it is a lightning arrester that has an insertion connection part for the lightning conductor protection tube at one end and an external outlet for the lightning conductor at the other end. Concerning joints for conductor protection pipes.

<Prior art> The main role (function) of this type of joint is to prevent rainwater flowing from a flat surface such as the roof of a building or the side wall of a tower from the lightning conductor drawn out to the outside from penetrating into the protection pipe. The purpose is to prevent corrosion of protective tubes, conducting wires, and even terminal boxes, as well as to prevent a decrease in safety against lightning shock current caused by intruding rainwater.

As shown in FIG. 5, the conventionally commonly used joint has a seal rubber 0 at the conductor outlet 02B at one end in the axial direction of the straight pipe joint body 02C.
4 was simply fitted.

<Problems to be solved by the invention> Therefore, if one end of the lightning protection conductor protection tube faces a vertical or nearly vertical flat surface such as the side wall of a tower building, and a joint is connected there, In addition, if one end of the protective tube faces a horizontal or almost horizontal flat surface such as the roof of a building, the conductor outlet in the joint body should be in an upward position. Even if a rubber seal is fitted, it is inevitable that rainwater will enter the joint body and even the protective tube during blowing down or heavy rain, and this has the drawback that the original function described above cannot be reliably achieved. Ta.

In view of these circumstances, the present invention aims to eliminate the above-mentioned conventional drawbacks by making simple improvements such as changing the shape of the joint body.

<Means for Solving the Problems> The lightning protection conductor protection pipe joint according to the present invention devised to achieve the above object has the configuration described in detail at the beginning, and has the above-mentioned plug-in connection part. The joint body between the main body and the outlet is curved in an arc shape so that the outlet faces diagonally downward in the usage mode, and specifically, the outlet is always located lower than its neighboring parts. , the central angle θ of the curved range of the joint body is set at an appropriate angle within the range of approximately 135° to approximately 60°, and the inwardly bent lip portion of the outlet is elastic. The structure is similar in that it has an annular groove into which the lightning protection conductor is fitted, and a seal rubber having a conductor insertion hole whose inner diameter is smaller in the free state than the outer diameter of the lightning conductor is fitted.

<Function> According to the joint according to the present invention having such a characteristic configuration, in a usage mode in which the plug-in connection part of one end of the joint main body is plug-connected to one end of the lightning protection conductor protection tube, the plug-in connection part is vertical. When the posture is taken, the central angle θ of the curvature range is approximately 135°, while when the insertion joint is in a horizontal position, the central angle θ of the curvature range is approximately 60°. If you use one with a suitable center angle θ between about 135° and about 60° in an intermediate position, the outlet at the other end will necessarily face diagonally downward. That is, the above-mentioned outlet is always located lower than the vicinity thereof. Moreover, a sealing rubber is fitted into this opening, and the lightning conductor is drawn out through the insertion hole of this sealing rubber.
An appropriate length portion close to the insertion hole is in a diagonally downward hanging position.

Furthermore, in the joint of the present invention, the mouth edge of the outlet for the lightning conductor is bent inward and fitted into the annular groove of the seal rubber, so that the seal rubber is in a non-removal state. It is held at the rim of the mouth and there is no risk of it falling off even though the outlet is oriented diagonally downward.

<Effects of the invention> Therefore, when compared with conventional products, the present invention has the following advantages: (1) It is extremely easy to curve the joint body into an arc shape using a pipe pender, etc., and the increase in production costs can be reduced. Although it is an improvement measure that causes almost no damage, (2) it can reliably prevent rainwater flowing along the lightning protection conductor from entering the joints and protective pipes, preventing corrosion of various components and preventing lightning strikes. It has now been possible to reliably achieve the original function of this type of joint, which is to prevent a decrease in safety against impact currents.

<Examples> Examples of the present invention will be described below in detail based on the drawings.

Embodiment 1 In FIGS. 1 and 2, 2C is a joint body made of impact-resistant hard vinyl, with one end protruding onto a horizontal or nearly horizontal flat surface F such as the top of a building. The protruding end portion 1A of the lightning protection conductor protection tube 1 buried in the building wall W in a state where
A plug connection portion 2A that can be externally fitted is formed at the other end, and an external outlet 2B for the lightning conductor 3 is formed at the other end. Mouth portion 2a of this outlet 2B
is bent inward, while the joint body 2
The seal rubber 4 is attached to the outer periphery of the seal rubber 4, which has an outer diameter equal to the inner diameter of the lightning conductor C, and has a conductor insertion hole 4a in the center which has an inner diameter slightly smaller than the outer diameter of the lightning arrester conductor 3 in the free state. When pushed in from the outside, the bent edge portion 2a forms an annular groove 4a into which the bent edge portion 2a is elastically fitted, and the seal rubber is then inserted into the outlet 2B between the bent edge portion 2a and the annular groove 4a. It is fitted in such a way that it cannot be removed through elastic fitting. Then, the insertion connection part 2
The joint body 2C between A and the outlet 2B
In the usage mode shown in FIG. 2 in which the insertion connecting portion 2A is inserted and connected to the protruding end portion 1A of the protective tube 1, the outlet 2B is curved in an arc shape so as to face diagonally downward, The curved range of the curved joint main body 2C is approximately 135 degrees at the center angle θ.
In the figure, 5 is a lightning rod, and 6 is a grounding electrode.
Furthermore, adhesive means is used as the fixing means for the insertion connecting portion 2A.

Embodiment The difference between the embodiment shown in FIG. 3 and the embodiment is that the insertion connecting portion 2A at one end of the joint body 2C is formed into a female thread, and is screwed into a male thread formed on the protruding end portion 1A of the protection tube 1. The joint is configured to be fixedly connected to the protection tube 1 by fitting it together,
The other configurations are completely the same as those in the embodiment.

Embodiment As shown in FIG. 4, a protection pipe 1 is buried in a wall W of a building such as a tower in a horizontal or almost horizontal position, and one end portion 1A thereof opens into a vertical or nearly vertical flat surface F'. In this embodiment, the insertion connecting portion 2A at one end of the joint body 2C is connected to the cylindrical portion 2a1 that fits into the one end portion 1A of the protection tube ₁ and the periphery of the opening at one end of the protection tube 1. It is composed of an insertion limit flange 2a ₂ that comes into contact with the flange 1a of
The two flanges 2a ₂ and 1a are fixedly connected to each other by adhesive means between their opposing surfaces, and the curvature range of the joint body 2C is set to approximately 60 degrees at the central angle θ. In this case, the outlet 2B faces diagonally downward in the usage mode, and the function is no different from that of the other embodiments.

[Brief explanation of the drawing]

Figures 1 and 2 show one embodiment of the present invention; Figure 1 is a vertical cross-sectional view of the joint, Figure 2 is a vertical cross-sectional view of the joint in use, and Figures 3 and 4 are separately shown. FIG. 5 is a longitudinal cross-sectional view of the conventional product in use. 1...Lightning conductor protection tube, 2A...Plug-in connection part,
2B...Outlet, 2C...Joint body, 3...Lightning conductor, 4...Seal rubber, 4a...Annular groove, 4b
... Conductor insertion hole, θ ... Center angle of joint body curvature range.

Claims (1)

[Claims for Utility Model Registration] A joint for a lightning protection conductor protection tube which has an insertion connection portion 2A for the lightning protection conductor protection tube 1 at one end and a draw-out port 2B for drawing out the lightning protection conductor 3 to the outside at the other end, Plug-in connection part 2A and the outlet 2
The joint main body 2C between B and B is curved, and the central angle of the curved range is between about 135 degrees and about 60 degrees, and the outlet is located below the vicinity of the joint body 2C, and the outlet 2B has an annular groove 4a into which the inwardly bent mouth edge portion 2a is elastically fitted, and a conductor insertion hole 4b whose inner diameter in a free state is smaller than the outer diameter of the lightning arrester conductor 3. A joint for a lightning protection conductor protection tube, characterized in that a seal rubber 4 is fitted into the outlet 2B. The joint for a lightning protection conductor protection tube according to claim 1, wherein the insertion connection portion 2A is fixedly connected to the end portion of the protection tube 1 inserted therein by adhesive means. The joint for a lightning protection conductor protection tube according to claim 1, wherein the insertion connection portion 2A is fixedly connected to the end portion of the protection tube 1 inserted therein by screwing means.