JP2539251Y2 - Lightning protection equipment for membrane roof structures - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention adopts a sheet-like membrane such as a glass fiber cloth as a roofing material, and stretches it between arch-shaped roofing structural materials to form a roof. The present invention relates to a lightning arrester that lays a ridge-side conductor along a roof.

[0002]

2. Description of the Related Art In such a membrane roof structure, there is a method in which a ridge conductor is directly mounted on an upper surface of a gasket at a seam of a roof material when installing a lightning arrester of a ridge conductor type in such a membrane roof structure.

In FIG. 6, a roofing material 15 is sandwiched between a bracket 11 and a clamp hardware 12, and the clamp hardware 12 is covered by a cover 25. Further, an end 21 of the cover 25 has an upper surface. Exposed gasket 2
0 on the membrane roof structure having a structure fitted to
Is directly attached to the upper surface of the gasket 20 in such a manner that the lower half thereof is embedded as shown in the figure (actual open flat 1-15).
0867).

[0004]

In such a conventional structure, the ridge conductor 23 is directly attached to the gasket 20 made of an insulating material such as synthetic rubber.
It is difficult to replace the gasket 20 or the gasket 20, and there is a problem that the gasket 20 is damaged when lightning is received. In consideration of the above points, the present invention aims to provide a lightning protection device for a membrane roof structure that facilitates replacement of a conductor and a gasket on a ridge and that can prevent damage during lightning. .

[0005]

According to the invention, there is provided a lightning arrester for a membrane roof structure according to the first aspect of the present invention, which comprises a plurality of sheet-like roofing materials, and a roof portion having a roof portion. The roofing material is sandwiched between a bracket and a clamp fitting, and the clamp fitting is covered with a cover and a gasket fitted to an end of the cover. In a lightning arrester having a structure for mounting a conductor, the ridge-side conductor is mounted at a distance from the gasket using a conductor mounting bracket.

[0006]

According to the first aspect of the present invention, the on-building conductor is mounted using the conductor mounting bracket, so that the on-building conductor and the gasket can be easily replaced. It is possible to prevent damage at the time.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a perspective view of a membrane roof structure. The membrane roof structure 1 includes a frame 2 and a roof 3.

The frame portion 2 has a structure in which arch frames 4 and 4 made of prestressed concrete are installed in parallel with a space therebetween, and are connected by a horizontal arch.

FIG. 2 is a partial perspective view of the roof. The roof 3 is installed so as to cover the frame 2. As the roof structural material, space frames 6, 6 made of arched steel pipes cross each other vertically and horizontally, and are assembled so as to cover the entire frame portion 2. Of these vertical and horizontal space frames 6, 6, an upper chord member 8 made of a steel pipe which is also a roof structural material is installed via a bundle 10 on a space frame parallel to the arch frames 4, 4 of the frame portion 2. ing.

FIG. 3 is a longitudinal sectional view showing a state where the on-building conductor is attached. A bracket 11 is installed on the upper chord material 8, and a clamp hardware 12 and a gasket fixture 17 for holding a roof material 15 are fixed on the bracket 11. A gasket 20 in which an end of a cover material 25 covering the clamp hardware 12 is fitted to the gasket fixture 17, and a ridge conductor 23 is attached on the gasket 20 using a conductor fixture 26. Has become.

A bracket 11 having a T-shaped cross section is continuously fixed on the upper chord material 8 in the longitudinal direction of the upper chord material 8 by welding. The clamp hardware 12 is attached to the left and right sides or one side of the bracket 11 in the width direction.
3 fixed. The clamp hardware 12 is continuous in the longitudinal direction of the upper chord material 8.

The roofing material 15 sandwiched between the bracket 11 and the clamp hardware 12 can be made of Teflon-coated glass fiber cloth or the like, and rubber cores 16 having a circular cross section are provided on both left and right edges of the sheet-like roofing material 15 in the longitudinal direction. Are formed continuously. The roof material 15 is sandwiched between the bracket 11 and the clamp hardware 12 together with the end of the cover material 25 covering the clamp hardware 12 with the rubber core 16 inside the end of the clamp hardware 12.

The gasket fixture 17 is fixed to the upper surface of the clamp hardware by bolts and nuts 13. The gasket attachment 17 is continuous in parallel with the clamp hardware 12. A gasket 20 made of an insulating material such as synthetic rubber is fitted to the gasket attachment 17. Recesses 21, 21 are formed in the left and right side edges of the gasket 20.
The ends of the cover members 25, 25 covering the second and the second 12 are fitted.

The conductor mounting member 26 has a mounting portion 26a and a rising portion 26b, and is formed in an L-shape as a whole. A large number of the conductor mounting brackets 26 are mounted at predetermined intervals in the length direction of the gasket 20. Above the rising portion 26b of the conductor fitting 26, a clamp fitting 28 having a ring-shaped holding portion 28a for supporting the ridge conductor 23 via the insulator 30 is provided with a bolt / nut 29 made of brass or the like.
It is fixed by. The conductor fitting 26 and the clamp fitting 28 are made of, for example, stainless steel.

As described above, a plurality of ridge conductors 23 are arranged in parallel with the roof 3 as shown in FIG. The ridge-up conductor 23 is connected to a conductor provided along the outer periphery of the roof 3 and is connected to a ground electrode by a down conductor.

In the above embodiment, an L-shaped conductor mounting member 26 is used. However, if the conductor 23 is separated from the gasket 20 and the on-building conductor 23 is mounted, the shape of the conductor mounting member 26 is as shown in FIG. A mounting portion 31a and a rising portion 31b in an inverted T-shape, and the mounting portion 31a is fixed to the upper surface of the gasket 20 with two screws 32,
Other shapes may be used. In FIG. 5, the same members as those in FIG. 3 are denoted by the same reference numerals.

[0017]

[Effect of this invention] As described above, this invention is a membrane roof structure in which a roof portion is formed by stretching a plurality of sheet-like roofing materials, and the roofing material is sandwiched between brackets and clamp hardware.
In addition, in the lightning arrester having a structure in which the clamp hardware is covered with a cover and a gasket fitted to an end of the cover, and a structure in which a conductor on a ridge is continuously attached to an upper surface of the gasket in a longitudinal direction, Since the upper conductor is mounted separately from the gasket by using a conductor mounting bracket, the following effects can be obtained. 1. Since the conductor on the ridge is attached to the upper surface of the gasket by using the conductor fitting, the installation and replacement of the conductor on the ridge become easy. 2. Since the on-building conductor is not attached directly to the top of the gasket, but is installed separately, it prevents damage to the gasket even during lightning strikes.

[Brief description of the drawings]

FIG. 1 is a perspective view of a membrane roof structure according to the present invention.

FIG. 2 is a partial perspective view of a roof part of the membrane roof structure according to the present invention.

FIG. 3 is a vertical cross-sectional view of the membrane roof structure according to the present invention with a ridge-side conductor attached thereto.

FIG. 4 is a plan view of the membrane roof structure according to the present invention.

FIG. 5 is a longitudinal sectional view of the membrane roof structure according to the present invention in a state where a ridge conductor is attached.

FIG. 6 is a schematic longitudinal sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Membrane roof structure 2 Frame part 3 Roof part 4 Arch frame 6 Space frame 8 Upper chord material 11 Bracket 12 Clamping hardware 15 Roofing material 17 Gasket mounting fixture 20 Gasket 23 Building conductor 25 Cover material 26 Conductor mounting fitting 27 Bolt 29 Bolt nut

Claims (1)

(57) [Scope of request for utility model registration] 1. A membrane roof structure in which a roof portion is constituted by stretching a plurality of sheet-like roofing materials, wherein the roofing material is sandwiched between a bracket and a clamp, and the clamp is a cover and a cover. In a lightning arrester having a structure in which an end of a cover is covered with a fitted gasket, and a structure in which a ridge conductor is continuously mounted in a longitudinal direction on an upper surface of the gasket, the ridge conductor is connected to a conductor mounting bracket. Lightning arrester for a membrane roof structure, which is installed separately from the gasket.