JPH0316361Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> This invention is a method of fixing a lightning rod support tube to a wall (surface) via an anchor etc. when installing a lightning rod on the roof of a building, for example. A lightning rod support tube fixing fitting that is used to securely attach it to a mounting base, and more specifically, a lightning rod support that is inserted into a sheath tube that is fixedly protruded from the mounting base and can be fixedly attached to a wall. The present invention relates to a metal fitting for tightening and fixing a tube to the sheath tube via a plurality of press bolts in the circumferential direction at the open end of the sheath tube.

<Prior Art> As shown in FIG. 9, the means for fixing the support tube for a lightning rod that has been generally used in the past is a sheath tube 02 that is integrally fixed and protruded from a stand 01 that is fixedly attached to a wall. The lower end portion of the support tube 03 for the lightning rod is inserted into the sheath tube 02, and the support tube 03 is attached to a plurality of push bolts 04, 04 arranged in the circumferential direction near the lower end and near the upper end opening of the sheath tube 02, respectively. While the support tube 03 is tightened and fixed to the sheath tube 02 through the
In order to prevent the intrusion of rainwater etc. into the annular gap that occurs between the sheath pipe 02 and the support pipe 03, early corrosion caused by such rainwater intrusion, and furthermore to strengthen the fixing strength to the sheath pipe 02. In addition, the sheath tube 02 and the support tube 03 were welded by row welding 06 all around at the upper end opening of the sheath tube 02.

<Problems to be solved by the invention> However, when using the conventional fixing means as described above, in addition to the fixing work with bolts, the above-mentioned row welding work is required at the installation site, which is time-consuming and requires a lot of skill. In short, it is very inefficient and has the disadvantage that the corrosion-resistant plating on the peripheral surface of the support tube near the welded area is likely to peel off due to the heat effect during welding, resulting in a decrease in the corrosion resistance of the support tube. Also,
Since it is necessary to perform reliable low welding, the difference between the outer diameter of the support tube and the inner diameter of the sheath tube cannot be made very large. There was a practical difficulty in that it had almost no applicability, such as when it was used for fixing multiple types of support tubes with different types.

In view of the above circumstances, the present invention provides a fixing fitting for a support tube for a lightning rod that can be securely and firmly fixed with a small amount of work, without reducing the corrosion resistance of the support tube, and that has high dimensional adaptability. Have a purpose in mind.

<Means for Solving the Problems> The lightning rod support pipe fixing fitting according to the present invention devised to achieve the above object is a fitting having the configuration described in detail at the beginning of the invention, and has the structure as described in detail at the beginning. A metal fitting main body, which is formed into a substantially T-shape in vertical cross section and has a flange portion that can come into contact with the periphery of the opening end of the support tube, and a cylindrical portion that can be externally fitted onto the support tube, is divided into a plurality of pieces in the circumferential direction, and The structure is characterized in that each cylindrical portion of the divided body is configured to be press-fixed to the outer circumferential surface of the support tube via the push bolt.

<Function> When using the lightning rod support pipe fixing fitting according to the present invention having such a characteristic configuration, each divided body of the fitting main body is fixed so that the cylindrical portion thereof is located within the sheath tube, and After temporarily assembling the diameter of the sheath pipe in an untightened state so that the flange part contacts and supports the periphery of the opening end of the sheath pipe, the lower end portion of the support pipe is inserted into the sheath pipe through the inner space of the cylindrical part of each divided body. let Thereafter, by tightening the push bolts, each of the divided bodies is moved in the diameter reduction direction to press the inner surface of the cylindrical portion against the outer circumferential surface of the support tube, and the support tube is tightened from multiple points in the circumferential direction. Fix it.
In this tightened and fixed state, the flange portions of each of the divided bodies close the annular gap between the outer circumferential surface of the support tube and the inner circumferential surface of the sheath tube at their upper ends, thereby preventing rainwater from entering. Since the inner circumferential surface of the cylindrical part of each divided body comes into close contact with the outer circumferential surface of the support tube, it is possible to prevent rainwater from entering through the outer circumferential surface of the support tube. It is also easy to perform caulking treatment between the inner circumferential end and the outer circumferential surface of the support tube, and such treatment can reliably prevent rainwater from entering along the outer circumferential surface of the support tube. Furthermore, since the tightening is performed by reducing the diameter of each divided body, even if the diameters of the support tubes are slightly different, it is possible to reliably and easily tighten and fix the support tubes in the desired state of preventing water intrusion.

<Effects of the invention> Therefore, when the present invention is used, compared to the conventional means described above, (1) efficient fixing work can be performed with less work effort;

(2) Low welding is not required, and the work efficiency mentioned in (1) above can be further improved, as well as the plating on the circumferential surface of the support tube is almost never peeled off, and the plating treatment improves the corrosion resistance of the support tube. can be held sufficiently.

(3) Because the tightening and fixing method is based on the diameter reduction of the split body, even if there is some manufacturing error in the diameter of the support tube, it can be firmly and securely tightened, and the support tube and ultimately the lightning rod can be installed (erected). (4) It can be used to fix support tubes of different diameters, and its dimensional applicability is sufficiently high, and it is easy to reduce costs by adopting mass production of a small number of products.

This resulted in many practical effects such as:

<Examples> Examples of the present invention will be described below in detail based on the drawings. In the support pipe installation construction drawing shown in Figure 4, 1
is a plate-shaped mount that is fixed to a wall W forming the roof surface of a reinforced concrete building via an anchor bolt V embedded with one end welded to the reinforcing bar R, and the central part The sheath tube 2 is fixed and protruded upward from the rib plate 7 while being reinforced and supported by the rib plate 7, and a conical support is provided on the mounting base 1 portion at a position corresponding to the bottom of the sheath tube 2. A tube fitting projection 10 is fixed and protruded. Reference numeral 3 denotes a support tube for the lightning rod, which is made of brass or stainless steel, and is generally galvanized for corrosion resistance. 4 is attached to the sheath tube 2 with its respective tip end screwed into nuts 8 welded at multiple locations in the circumferential direction on the outer circumferential surface of the tube 2 near the upper end opening of the sheath tube 2.
This is a push bolt that protrudes inward. Reference numeral 5 denotes a flange portion 5A that can be brought into contact with the periphery of the upper end opening of the sheath tube 2, a cylindrical portion 5B that can be externally fitted onto the support tube 3, and a cylindrical portion 5B that extends from the outer periphery of the flange portion 5A in the same direction as the cylindrical portion 5B. This is a metal fitting main body for tightening and fixing a support pipe, which is formed into a substantially T-shaped longitudinal cross-section, with a cylindrical portion 5C integrally protruding from one side and a cylindrical portion 5C that is shorter than the other. As clearly shown in FIG. 3, each of the divided bodies 5 ₁ and 5 2 is divided into two parts in the circumferential direction by press working, and the cylindrical parts 5B and 5B of each divided body 5 1 and 5 ₂ are inserted inward in the radial direction via the push bolt 4. _The outer circumferential surface of the support tube 3 can be pressed and fixed by moving the support tube ₃ to reduce its diameter. One of the protrusion 5a and the recess 5b which fit into each other in the tightened and fixed state to the pipe 3 is formed, and each flange part 5A, 5
It is formed in an arcuate shape so as to form recesses 5d, 5d for filling the sealing caulking material between the inner peripheral end portion and the outer peripheral surface of the support tube 3 of A.

Thus, the lower end portion of the support tube 3 is connected to the sheath tube 2.
By fitting the lower end opening into the projection 10, the lower end position of the support tube 3 is fixed, and by rotating the push bolt 4 in the tightening direction, the divided body 5 of the metal fitting main body 5 ₁ and 5 ₂ are moved to reduce their diameters, and the cylindrical portions 5B and 5B of the divided bodies 5 ₁ and 5 ₂ are pressed and brought into close contact with the outer peripheral surface of the support tube 3, as shown in FIGS. 5 and 6. The tube 3 is fixedly supported at the upper end opening of the sheath tube 2. Then, in such a fixed state, the caulking material 11 is filled into the recesses 5d and 5d formed between the outer peripheral surface of the support tube 3 and the inner peripheral end of each of the divided bodies 5 ₁ and 5 ₂ in the metal fitting main body 5. This prevents rainwater flowing along the outer peripheral surface of the support tube 3 from entering the inside of the sheath tube 2, and also allows the upper end opening of the sheath tube 2 to be connected to the flange portions 5A and 5A of each of the divided bodies 5 ₁ and 5 ₂ . It is covered and has a cylindrical portion 5 facing downward on its outer periphery.
C and 5C are located. Since it has a so-called labyrinth structure, it is possible to reliably prevent rainwater from entering due to falling rain. 9 in the figure is a small drain hole formed at the lower end of the sheath tube 2.

Other examples will be listed below.

[] In the embodiment shown in FIG. 7, the metal fitting main body 5
In order to allow the divided bodies 5 ₁ and 5 ₂ to have the same specifications, a protrusion 5a and a recess 5b are provided at both ends of the divided bodies 5 ₁ and 5 ₂ in the circumferential _direction , respectively. 5 ₂ is constructed in a rotationally symmetrical manner.

[] The metal fitting main body 5 may be divided into three or four parts in the circumferential direction.

[] In the embodiment shown in FIG. 8, each of the divided bodies 5
The upper surfaces of the flange portions 5A and 5A of ₁ and 5 ₂ are formed into downward sloped surfaces facing outward.
This is more effective in preventing rainwater from entering.

[] The outer cylindrical portion 5C of the metal fitting main body 5 may be omitted.

[Brief explanation of drawings]

1 to 6 show an embodiment of the present invention,
Figure 1 is a perspective view of the disassembled state, Figures 2 and 3 are side and plan views of the assembled state, Figure 4 is an overall view of the installed state, and Figure 5 is an enlarged view of the main parts of Figure 4. Longitudinal cross-sectional view, Figure 6 is a cross-sectional view taken along the line of Figure 5, Figure 7 is
7 and 8 show different embodiments, respectively.
The figure is a plan view of an exploded state, FIG. 8 is an enlarged longitudinal sectional view of the main part, and FIG. 9 is an enlarged longitudinal sectional view of the main part showing a conventional example. 1...Mounting base, 2...Sheath pipe, 3...Support pipe, 4
... Push bolt, 5 ... Metal fitting body, 5 ₁ , 5 ₂ ...
Divided body, 5A...Flange part, 5B...Cylinder part, 5
C...Outer cylindrical portion, 5a...Protrusion, 5b...Recess.

Claims (1)

[Claims for Utility Model Registration] A lightning rod support tube 3 inserted into a sheath tube 2 integrally fixedly protruding from a mounting base 1 that can be fixedly attached to a wall W is attached to an open end of the sheath tube 2. A metal fitting that is tightened and fixed to the sheath tube 2 via a plurality of press bolts 4 in the circumferential direction, the sheath tube 2
The fitting main body 5, which has a flange portion 5A that can be brought into contact with the periphery of the opening end and a cylindrical portion 5B that can be externally fitted onto the support tube 3, and has a substantially T-shaped longitudinal section, is divided into a plurality of pieces in the circumferential direction. composed of those divided bodies 5
₁ , 5 ₂ , each cylinder portion 5B, 5B is connected to the push bolt 4.
A fixing fitting for a support tube for a lightning rod, characterized in that it is configured to be press-fixed to the outer circumferential surface of the support tube 3 through the respective support tubes. According to the utility model registered claim, the metal fitting main body 5 has a cylindrical portion 5C integrally connected to the outer periphery of the flange portion 5A and protruding in the same direction as the cylindrical portion 5B but shorter than the cylindrical portion 5B. Fixing fittings for the lightning rod support tube described. The divided bodies 5 ₁ and 5 ₂ each have one of a protrusion 5 a and a recess 5 b that fit into each other when the support tube 3 is tightened and fixed at the circumferential end of each of the flange portions 5 A and 5 A. A fixing fitting for a support tube for a lightning rod as set forth in claim 1 of a certain utility model registration. The divided bodies 5 ₁ and 5 ₂ have recesses 5 d and 5 d for filling with a sealing caulking material at the inner circumferential ends of their respective flange portions 5 A and 5 A, as described in claim 1 of the utility model registration claim. Fixing fittings for support tubes for lightning rods.