JP2912928B2 - Support structure of lightning rod in lightning rod - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for connecting a lightning rod to an upper support pipe and a lower support pipe for supporting the lightning rod.

[0002]

2. Description of the Related Art Conventionally, a lightning rod installed on the roof of a building is constructed by attaching a lower supporting pipe to a fixed object on the roof of a building at an installation site, and then connecting an upper supporting pipe connected to a lightning rod to the lower supporting pipe. And fixed by welding at the lightning rod installation site.

[0003]

However, according to such conventional means, the workability is poor because many lightning rods are installed at high places with poor scaffolding, and the welding work is very difficult. In some cases, it is also a factor in the necessity of leaving out work in an insufficiently welded state. In addition, welding requires advanced technology by qualified people,
There was a problem that workers were short due to dangerous work at high places and the total cost was high.

Accordingly, the present invention eliminates any welding work at a lightning rod installation site, and enables a general worker to easily perform a lightning rod installation work with a simple operation, especially a lightning rod support structure. Provide a support structure for the lightning rod in the lightning rod that can electrically and mechanically connect and fix the upper support pipe connecting the upper and lower support pipes, thereby ensuring the reliability, homogenization, and installation work of the lightning rod The main purpose is to speed up the process and reduce the total cost.

[0005]

In order to achieve the above object, the present invention takes the following technical measures. That is, in the support structure according to the present invention, an upper support pipe 1 provided with a screw 10a for connecting the lightning arrester 3 at the upper part and a screw 4 for connection to the lower support pipe at the lower end, and the upper support pipe 1 is inserted. And a lower support tube 2 having an inner diameter as large as possible. This lower support tube 2
A pipe joint 6 provided with a fitting screw 5 to be screwed with the connecting screw 4 of the upper support tube 1 is fixed inside the pipe. A reducer 8 having a connecting means 7 for removably fixing the upper end of the lower support tube 2 and the upper support tube 1 inserted therein is integrally fixed to the upper end of the lower support tube 2. The structure was

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A connecting means 7 provided on the reducer 8 is used to screw a set bolt 9 from the outer surface of the reducer to fix the outer surface of the upper support tube 1 by crimping. The set bolts 9 are preferably stopped from three directions at equal intervals in the circumferential direction. This achieves a strong connection and fixation.

Further, the lower support pipe 2 and the pipe joint 6 incorporated therein are welded and fixed at a factory in advance through holes 12 formed at three places in the circumferential direction. Also, the upper support tube 1 and the coupling 10 are connected and fixed in advance at a factory via holes 11 formed at three places in the circumferential direction. Accordingly, at the work site, the members to be connected can be connected at two points: the lightning rod 3 and the upper support tube 1 are screwed together, and the upper support tube 1 and the lower support tube 2 are screwed together. Dramatic simplification and speeding up can be achieved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below based on a first embodiment shown in the drawings. In the figure, reference numeral 1 denotes an upper support tube,
A lightning arrester 3 made of a conductive metal such as aluminum, copper, or stainless steel is provided on the support tube 1 via a coupling 10.
And electrically and mechanically connected and fixed. In this embodiment, the lower part of the lightning arrester 3 is screwed into the screw part 10 a of the coupling 10, and the flange part 10
b and is fitted to the upper support tube 1 so as to close the opening at the upper end of the upper support tube 1, and is welded from a hole 11 formed in the upper support tube 1 and joined to the upper support tube 1. I have.
This welding operation is performed in advance at the factory. An inner screw 4 for connection is provided at the lower end of the upper support tube 1.

Reference numeral 2 in the figure denotes a lower support tube, which has an inside diameter into which the upper support tube 1 can be inserted, and has a predetermined internal portion for fitting which is screwed into an inner screw 4 of the upper support tube 1. A pipe joint 6 having an external thread 5 is fixed. As shown in FIGS. 4 and 5, the pipe joint 6 radially expands the lower part of the short pipe body in three directions until it has an outer diameter substantially equal to the inner diameter of the lower support pipe 2. Lower support tube 2
And is connected to the lower support tube 2 by welding from three holes 12 formed therethrough. This welding work is also performed in a factory in advance.

Further, as shown in FIGS. 2 and 3, a bolting means as a connecting means 7 for releasably fixing the upper end of the lower support tube 2 and the upper support tube 1 inserted therein is provided. A juicer 8 is fitted over the upper end of the lower support tube 2 and is welded and fixed by welding holes 13 provided at three places in the circumferential direction. This connecting means 7 is, as shown in FIG.
A set bolt 9 is screwed into the outer surface of the reducer 8 to fix the outer surface of the upper support tube 1 by pressure. The set bolts 9 are spaced at equal intervals in the circumferential direction.
It is preferable to stop from the direction. Thereby, the connection can be effectively performed with a small number of set bolts.

In the support structure for a lightning arrester configured as described above, the lower support pipe 2 is attached to a fixed object such as a rooftop wall of a building at a work site via another attachment fitting (not shown). Thereafter, the upper support pipe 1 to which the lightning arrester 3 is to be screwed in advance or to be screwed in later is inserted into the lower support pipe 2 and the inner screw 4 at the lower end thereof is screwed to the outer screw 5 of the internal fitting 6. Finally, by tightening the set bolt 9, the upper and lower support tubes 1 and 2 can be easily connected and fixed without performing a complicated welding operation.
Also, since the lower support pipe 2 and the pipe joint 6 incorporated therein, and the upper support pipe 1 and the lightning arrester connecting coupling 10 are welded in advance at a factory, the members to be connected at the work site are upper support. Only two screwing operations of the screw connection of the pipe 1 and the lower support pipe 2 and the screw connection of the lightning arrester 3 to the upper support pipe 1 are required.

FIGS. 6 and 7 show another embodiment of the pipe joint 6. The pipe joint 6 shown in this embodiment is different from the pipe joint 6 shown in FIG.
The outer screw 5 formed on the upper portion has the same diameter and the same size as the outer screw 5 of the pipe joint 6 shown in the first embodiment, and is fitted to the inner screw 4 below the upper support tube 1. Yes,
The lower expanded portion is adapted to match a large-diameter pipe shown by a two-dot chain line arc different from the lower support pipe 2 of the first embodiment. In this way, the size of the lower extension of the pipe joint 6 is changed so as to conform to several types of pipes, and several types of lower support pipes 2 having different inner diameters are formed. A lightning rod support tube having a thickness and a height suitable for the structure can be constructed.

The embodiment shown in FIG.
2 shows another embodiment of the connecting means, wherein the connecting screw 4 formed below the upper supporting pipe 1 is used as an external thread, and the fitting screw 5 of the pipe joint 6 is welded and connected to the inside of the lower supporting pipe 2. Is an internal thread formed on the inner surface of the cylindrical portion, and the pipe joint 6 is turned upside down from the case of the first embodiment, that is, the inside of the lower support pipe 2 with the expanded portion side upward. It is a structure that is welded. In addition, a driving recess 14 as a positioning and stopper is formed in three directions below the inner screw 5 for fitting. Of course, the depression 14 may not be provided, or an arbitrary means such as forming a projection at the lower end of the cylindrical portion and bending or welding other small pieces may be employed.

The embodiments which are considered to be representative of the present invention have been described above. However, the present invention is not necessarily limited to the structures of these embodiments, but includes the structural requirements and achieves the object of the present invention. However, the present invention can be appropriately modified and implemented within a range in which the following effects can be obtained.

[0015]

As described in detail above, in the present invention,
General workers can securely install the lightning rod without any welding work at the site where the lightning rod is installed, and in particular, install the lightning rod at a high place with poor scaffolding. Work can be performed easily, safely and quickly, and there is a remarkable effect that it is possible to ensure the safety of workers, to ensure the construction, to make the work uniform, and to reduce the total cost.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view of an upper support tube portion of a first embodiment.

FIG. 2 is a partial cross-sectional front view showing a main part of the upper support tube and the lower support tube.

FIG. 3 is a partially sectional front view showing a connection state between the upper support tube and the lower support tube.

FIG. 4 is a front view of the pipe joint.

FIG. 5 is a bottom view of the pipe joint shown in FIG. 4;

FIG. 6 is a front view of a pipe joint showing another embodiment.

FIG. 7 is a bottom view of the pipe joint of FIG. 6;

FIG. 8 is a partial sectional front view of a portion corresponding to FIG. 2 showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper support pipe 2 Lower support pipe 3 Lightning arrester 4 Connection screw of upper support pipe 5 Fitting screw of pipe joint 6 Pipe joint 7 Coupling means 8 Reducer 9 Set bolt 10 Coupling

Claims (1)

(57) [Claims] 1. A screw part (10a) for connecting a lightning arrester (3) on an upper part.
An upper support pipe (1) provided with a screw (4) for coupling to the lower support pipe at the lower end, and a lower support pipe (2) having an inside diameter into which the upper support pipe (1) can be inserted. , This lower support tube (2)
Inside, a pipe joint (6) provided with a fitting screw (5) to be screwed with a connection screw (4) of the upper support pipe (1) is fixed, and further, an upper end of the lower support pipe (2). Section and upper support tube inserted into this section
A support structure for a lightning rod in a lightning rod in which a reducer (8) provided with a coupling means (7) for removably fixing (1) is integrally fixed to an upper end of a lower support pipe (2).