JPS5923167Y2 - Steel tower nest prevention cover - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a nest-proof cover used in a steel tower.

In steel towers for power transmission lines, etc., pipes are used as horizontal or diagonal members, but birds such as sparrows nest in the openings at the ends of these pipes, causing corrosion of the members and staining of the insulators due to bird excrement, etc. is a problem.

For this reason, it has been proposed to close the end of the pipe by welding or adhering a cover.

By the way, the so-called edge-welded pipe, in which a flat steel plate is formed into a sheath shape and the vertical seams are welded, is often used as the pipe member of the steel tower.

In addition, it is necessary to install a joint member for suspending the insulator at the end of the pipe member of the transmission line tower, and this installation usually requires installation in Figure 1A and Figure 1B (Figure 1A As shown in BB sectional view), a notch is provided at the end of the pipe, a joint 2' is fitted into the notch, and the joint 2' and pipe P' are welded 3'.

However, if the pipe is the above-mentioned edge-welded pipe, the welding heat between the joint and the pipe causes processing distortion during forming the edge-sewn welded pipe into a sheath shape, resulting in the distortion shown in Figure 1B. As shown, deformation of the cross-sectional shape of the pipe end cannot be avoided.

If there is such distortion at the pipe end, it is difficult to stably fix the pipe end to the pipe end with the conventional pipe end blocking cover described above, and the distorted pipe end must be corrected, making installation difficult. be.

Even if it is possible to attach the cover to the end of the pipe, it is inevitable that the cover will be unstable, and there is a concern that the cover may come off unexpectedly due to strong wind pressure at the top of the tower.

In addition, due to deformation of the pipe end, it may not be possible to install the cover to the end of the pipe without leaving any gaps, which may cause resonance due to the wind, causing whistling noise that may give a sense of abnormality to nearby residents. It often happens.

The rust prevention cover for a steel tower according to the present invention has a structure that can eliminate the above-mentioned disadvantages, and has a substantially semicircular plate portion that is applied to the opening at the end of the pipe arm member of the steel tower, and a cover that is applied to the outer surface of the end of the member. The substantially semicircular plate portion is divided by radial slits, and a stretchable sheet is laminated on at least one side of both sides of the plate portion, and an elastic sheet is laminated on at least one side of both sides of the plate portion. is characterized by being provided with an adhesive layer.

The present invention will be explained below with reference to the drawings.

FIG. 2 shows a nest-proofing cover A according to the present invention.

In FIG. 2, reference numeral 1 indicates a cover main body, which is composed of a substantially semicircular plate portion 11 and an arcuate band frame edge 12 along the semicircumference of the plate portion 11. The portion 11 is divided into fan shapes by radial slits 2.2.

This cover main body 1 is made by cutting a thin plate (usually 0.3 to 1.0 mm thick), such as a steel plate, stainless steel plate, or hard plastic plate, with a predetermined strength and corrosion resistance into the shape shown in FIG. 3A. , can be created by bending this.

FIG. 3B shows a top view of the cover body bent in this way, and the arc angle of the approximately semicircular plate portion is 180°.
It is much smaller.

In FIG. 2, reference numeral 3 denotes an elastic sheet laminated on the back surface of the substantially semicircular plate portion 11, and has a thickness of 0.5 to 5.5 mm.
0 mm synthetic rubber sheet, foamed plastic sheet, felt, synthetic leather, etc. can be used.

This elastic sheet can also be laminated on the outer surface or both the inner and outer surfaces of the plate portion 11.

4 is an adhesive layer provided on the inner surface of the strip frame edge 12;
A double-sided adhesive elastic sheet I can be used, which is an elastic sheet having a thickness of 0.5 to 1.0 mm with adhesive layers provided on both sides.

FIG. 4A and FIG. 4B are a front view and a cross-sectional view showing how the anti-fog cover according to the present invention is used.

In Fig. 4A and Fig. 4B, P indicates the pipe arm member of the steel tower, B indicates the joint welded to the arm member, A,
A indicates the antifouling cover according to the present invention, and the end P of the pipe arm member is the cover A.

It is closed by the approximately semicircular plate portion 11.11 of A,
Approximately semicircular band-shaped frame edges 12.12 of the covers A, A are adhered to the outer peripheral surface of the member end P by adhesive layers 4, 4.

In the above, the bending rigidity against the curvature change of the band-shaped frame edge 12 itself of the cover A is extremely small, and the deformation resistance of the plate portion 11 against the bending deformation of the band-shaped frame edge 12 is also
It is small due to the fan-like deformability due to the slits 2, 2, .

Therefore, even if there is distortion in the cross-sectional shape of the pipe arm member end P, if the cover A is fitted to the member end, the divided pieces of the approximately semicircular plate portion will The space is wide enough to allow the cover to be easily fitted to the end of the arm member.

In this case, the elastic sheet stretches according to the degree of opening between the divided pieces of the approximately semicircular plate part, and the stress due to this stretching causes a pressure force between the band-shaped frame edge 12 of the cover A and the end surface of the arm member. (radial compressive force) acts on the frame edge 12
(In the case of radial tension, the adhesion strength decreases) to the end of the arm member.

In addition, the approximately semicircular plate portion 11 has a slit 2°2...
Even though these slits 2, 2... are provided, they are closed by the stretchable sheet 3 laminated to the plate portion 11, so they do not work under strong winds. There is no whistling sound caused by resonance.

As mentioned above, according to the anti-rust cover according to the present invention, it is possible to stably attach the anti-evil cover to the end of a pipe arm member of a steel tower, where deformation of the cross-sectional shape is unavoidable due to the welding of the joints described above, and moreover, It can be easily installed without the problem of whistling noise.

[Brief explanation of the drawing]

FIG. 1A is a side explanatory view showing the pipe arm member of the steel tower;
FIG. 1B is a sectional view taken along line B-B in FIG. 1A, FIG. 2 is a perspective explanatory view showing the cover according to the present invention, FIG. 3A is a plan view showing the base material for the cover, and FIG. 3B 4A is an explanatory top view of the cover, FIG. 4A is a front explanatory view showing how the cover according to the present invention is used, and FIG. 4B is a cross-sectional explanatory view showing how the cover according to the present invention is used. In the figure, 11 is a substantially semicircular plate portion, 12 is a substantially semicircular band frame edge, 2, 2 is a slit, 3 is an elastic sheet, and 4 is an adhesive layer.

Claims (1)

[Scope of utility model registration request] The substantially semicircular plate portion is provided with a substantially semicircular plate portion that is applied to the opening at the end of the pipe arm member of the steel tower, and an arcuate band-shaped frame edge that is applied to the outer surface of the end of the member, and the substantially semicircular plate portion is provided with a radial slit. A nestproof cover for a steel tower, characterized in that it is divided into parts, a stretchable sheet is laminated on at least one side of both sides of the plate part, and an adhesive layer is provided on the inner surface of the edge of the band-shaped frame.