JP4117241B2 - Bird damage prevention tool - Google Patents

Description

  The present invention mainly relates to a bird damage prevention device installed to prevent birds such as crows and pigeons from nesting on a power pole.

A bird harm prevention tool in which a large number of rod-shaped protrusions are arranged with a close interval in order to prevent birds such as crows and pigeons from flying is known from Patent Documents 1 and 2 listed below. Patent Document 3 restricts the space so that a nest cannot be formed by suspending a sphere on a utility pole or the like.
Japanese Patent Laid-Open No. 10-84839 JP 2003-000134 A JP 2001-258464 A

By the way, the nesting space on the utility pole is greatly different depending on the state of attachment of the arm bracket, the presence or absence of a switch, a transformer, etc. Then, there was no other way than to deal with the difference in the situation by increasing / decreasing the number of attachments and the size of the sphere. For this reason, in the said conventional preventive tool, the measure at an attachment site was not easy, and there existed a possibility that the space which can be nested depending on the situation remained, and could not prevent bird damage effectively.
In addition, in the conventional preventive device in which a large number of bars are arranged upward, it is possible to hook wire hangers etc. carried by birds in their mouths. But there was a risk of nesting.
The present invention seeks to eliminate the disadvantages of the conventional bird damage prevention device.

  For this purpose, the bird harm prevention device according to the present invention comprises a plurality of electric bars in which a round bar-shaped electrically insulating trunk body supported substantially vertically and a branch bar fixed to the outer periphery of a cylindrical mounting base are inclined. And a plurality of branches are formed on the trunk body by forming a detent on both end faces of the mounting base, and engaging the detent on the trunk by fitting the mounting base to the trunk. The rod is supported by expanding radially at a predetermined angle.

Further, the present invention is characterized in that, in the above bird damage prevention tool, the branch bar is formed so as to hang downwardly on the outer periphery of the cylindrical mounting base.
For this reason, the branch bar can be freely extended in a necessary space according to the situation on the electric pole, and the nesting is made difficult by dropping the wire for nest formation.

According to the present invention, in the above bird damage prevention device, a screw threaded portion is formed in the mounting base of the branch body, and a set screw is screwed into the screw threaded portion so that the set screw is pressure-bonded to the trunk. It is characterized by that.
For this reason, a branch bar can be effectively provided at the required height position on the utility pole.

  The branch bar can be freely extended in the necessary space according to the situation on the utility pole, etc., so that nesting can be made completely difficult and bird damage can be effectively prevented.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a bird harm prevention tool according to the present invention. In the figure, reference numeral 1 denotes a trunk body which is supported substantially vertically, and the trunk body is a round bar having a diameter of about 10 to 20 mm having rigidity made of an electrically insulating synthetic resin material. Reference numeral 2 denotes a branch body made of an electrically insulating synthetic resin material attached to the trunk body.

As shown in FIGS. 2 to 5, the branch body 2 has an angle α with respect to a horizontal plane that hangs downward on the outer periphery of a cylindrical attachment base portion 4 that can be fitted onto the trunk body 1 in a downward inclined manner. The branch bar 3 is integrally formed. The branch bar 3 is obtained by applying a polyethylene resin film to the outer peripheral surface of a linear bar made of glass fiber having high electrical insulation and rigidity. Further, a concave portion 5 is provided on the lower end surface of the mounting base portion 4, and the upper end surface of the mounting base portion 4 protrudes with respect to the concave portion 5 so as to have an angle β of 45 degrees in plan view as shown in FIG. 5. As will be described later, a rotation stop is formed by fitting the concave portion 5 and the convex portion 6 as described later.
Reference numeral 7 denotes a screw threaded portion protruding from one side of the mounting base 4 so that a set screw (tapping screw) 8 can be screwed into the screw threaded portion.

  The reference numeral 4A in FIG. 1 denotes an attachment base portion on which the branch bar 3 is not formed. As shown in FIG. 6, the attachment base portion 4A is externally fitted to the lower portion of the trunk body 1 supported vertically. Then, by tightening the set screw 8 screwed into the screw threaded portion 7, the tip of the set screw 8 is crimped to the outer peripheral surface of the trunk body 1, and the mounting base 4A is fixed. And the attachment base 4 of the said branch body 2 is inserted from the upper end of this trunk | body 1, and the convex part 6 provided in the upper end surface of the attachment base 4A is fitted in the recessed part 5 provided in the lower end surface of this attachment base 4. To do. This fitting forms a detent that prevents the mounting base 4 from rotating unnecessarily. The plurality of branches 2 are further inserted into the mounting base 4 from the upper end of the trunk 1, and the convex portion 6 of the lower mounting base 4 is fitted into the concave portion 5 of the upper mounting base 4. As a result, as shown in FIGS. 7 and 8, the upper mounting base is fixed relative to the lower mounting base relative to one direction at an angle β (45 degrees), and the lower branch bar is fixed. 3, the upper branch bar 3 is radially expanded and supported, and a plurality of branch bars have a spiral shape facing in all directions. Note that the mounting base 4 of the uppermost branch body 2 is preferably fixed by a set screw 8 in order to prevent lifting due to wind or the like.

As shown in FIG. 9, the bird damage prevention device configured in this way has the lower end portion of the trunk 1 attached to the tubular attachment 13 fixed to the arm metal 11 of the utility pole 10 via the clamp 12. By inserting it, it is supported substantially vertically, and by projecting each branch bar 3 radially on all sides of this utility pole, the arrival of birds and nesting are prevented. In particular, since each branch bar 3 is supported in a downwardly inclined manner, even if a wire or the like for nest building is carried in, it falls along the slope and makes it difficult to nest.
Further, the branch bar 3 can be easily cut to an appropriate length by a cutter, so that it can be freely extended in a space where there is a risk of nesting on the utility pole so as not to contact a switch or a transformer. . Moreover, since it consists of an electrically insulating material, there is no possibility that a short circuit accident will occur on the utility pole due to the provision of this bird damage prevention device.

  FIG. 10 shows another embodiment of the above-mentioned detent formed on the mounting base 4. In this embodiment, the upper and lower end surfaces of the mounting base 4 are formed with irregularities 9 in a chrysanthemum pattern, respectively, and the trunk When the projections 1 and 2 are inserted into the upper and lower mounting bases 4, the upper and lower mounting bases 4 engage with each other to prevent rotation, so that the opening angle of the upper and lower branch bars 3 is maintained at a desired constant angle. Thus, the rotation stopper is not limited to the structure shown in these embodiments. In this embodiment, the opening angle between the lower branch bar 3 and the upper branch bar 3 can be freely set, so that the branch bars can be extended to necessary places according to the situation on the utility pole.

In the above embodiment, the mounting base 4A not having the branch bar 3 is fixed in advance to a predetermined height of the trunk 1 in order to facilitate transportation and assembly. However, such a mounting base 4A is not necessarily used. There is no. Needless to say, the inclination angle of the branch bar 3 is not limited to the above embodiment.
In this embodiment, one branch bar is provided on one attachment base, but a plurality of branch bars may be provided on one attachment base.

The disassembled perspective view of the bird damage prevention tool which shows the Example of this invention. The perspective view when the branch body of the bird harm prevention tool which shows the Example of this invention is seen from upper direction. The perspective view when the branch body of the bird harm prevention tool which shows the Example of this invention is seen from the downward direction. The longitudinal cross-sectional view of the branch body of the bird damage prevention tool which shows the Example of this invention. The top view of the branch body of the bird damage prevention tool which shows the Example of this invention. The longitudinal cross-sectional view of the principal part of the bird damage prevention tool which shows the Example of this invention. The perspective view of the bird damage prevention tool which shows the Example of this invention. The top view of the bird damage prevention tool which shows the Example of this invention. The perspective view of the use condition of the bird damage prevention tool which shows the Example of this invention. The perspective view which shows the other Example of the branch body of the bird damage prevention tool of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Trunk body 2 Branch body 3 Branch bar 4 Mounting base 5 Concave part 6 Convex part 7 Screwing part 8 Set screw

Claims (3)

It consists of a round bar-shaped electrically insulating trunk that is supported substantially vertically and a plurality of electrically insulating branches with branch bars fixed to the outer periphery of a cylindrical mounting base, and both upper and lower ends of the mounting base And a plurality of mounting bases are externally fitted to the trunk body, and the concave and convex portions of the mounting bases adjacent to each other are fitted to the trunk. A bird damage prevention device characterized in that a plurality of branch bars are radially spread and supported at a predetermined angle on the body.   The bird harm prevention tool according to claim 1, wherein the branch bar is formed so as to hang downwardly on the outer periphery of the cylindrical mounting base.   The bird damage according to claim 1 or 2, wherein a screw threaded portion is formed in the attachment base portion of the branch body, and a set screw is screwed into the screw threaded portion so that the set screw is crimped to the trunk body. Prevention tool.

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