JP2007241005A - Caution sign board for aircraft - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a caution sign board for aircraft which attracts attention of an aircraft patrolling power transmission facilities and takes a scene from the ground into consideration and is fitted nearby the top of an iron tower for power transmission. <P>SOLUTION: The caution sign board for aircraft comprises a recognition part 4 having a horizontally thin and long belt-like recognition surface 4a processed to increase recognition property at one side and a non-recognition part 9 having a horizontally thin and long belt-like non-recognition surface 6a processed to decrease recognition property at one side on a nearly perpendicular surface nearby the top of the iron tower for power transmission. The recognition surface 4a obliquely faces up at an angle where the recognition surface is easy to see from above a power transmission line and hard to see from the ground, and the non-recognition surface 6a obliquely faces down at an angle where the non-recognition surface is easy to see from the ground and hard to see from above the power transmission line, the recognition part and non-recognition part appearing alternately and successively in the perpendicular direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to an aircraft warning sign board, and more specifically, for an aircraft in which attention is paid to an aircraft for patrol of power transmission equipment by attaching it near the top of a high-voltage tower for power transmission, and the landscape from the ground is also taken into consideration. Concerning caution sign boards.

Conventionally, inspecting high-voltage power transmission towers (transmission towers) constructed in mountainous areas and transmission lines spanned between the transmission towers, patrol helicopters boarded by inspectors, transmission lines and transmission towers This is done by flying along the power transmission line while maintaining a distance of 20 to 30 meters and visually inspected by an inspector.
In order to prevent contact accidents with the power transmission tower, and to alert the flight airspace to the patrol helicopter flying close to the power transmission line and power transmission tower, In many cases, it was painted yellow, which means that it is a low-flying caution air space, and red, which means that it is a low-flying air space.

On the other hand, in recent years, mainly due to the demand for compliance with landscape regulations, the power transmission tower is painted in an environmentally harmonious color such as black, gray, brown, green, etc. according to the surrounding environment so that the power transmission tower is integrated with the surrounding environment. There are many cases.
In such a case, if the upper part of the steel tower is painted red or yellow, it may not only obstruct harmony with the surrounding environment of the power transmission tower but also may not comply with the landscape regulations. Therefore, in such a case, a rectangular plate-shaped caution sign plate having a vertical and horizontal dimension of about 40 cm x 60 cm, whose surface is painted red or yellow, is attached to the vertical surface on the transmission line side of the steel tower structure member near the top of the tower. It was.

  However, the flat warning sign board attached to the vertical plane of the power transmission tower is located diagonally forward and downward from the patrol helicopter that flies over the transmission line along the transmission line. Since the painted surface will be squinted, its recognizability is not sufficient. On the other hand, such warning sign boards painted in red or yellow are conspicuous when looked up from the ground and still have the problem of affecting the landscape.

Therefore, as in the invention described in Patent Document 1, a “steel tower sign plate joint fitting” or the like for freely adjusting and holding the vertical inclination of the sign board on the structural member of the steel tower has been proposed. Yes.
JP 9-34368 A

  The invention described in Patent Document 1 can attach the sign plate to the steel tower at a free angle, has high recognition from the sky, and can make the sign surface difficult to see from the ground, and has an effect on the landscape. Although it is excellent in that there are few, the structure is complicated, and in order to adjust the angle of the sign plate, it is necessary to remove the bolt that secures the sign plate and its joining bracket, so during the angle adjustment work There was a risk of falling sign boards.

  The present invention has been made to solve the above problems, and its object is to provide a warning sign board for an aircraft having a simple structure that has a high impact on the landscape while being highly recognizable from an aircraft such as a helicopter for patrol. There is to do.

  In order to solve the above problem, the aircraft warning sign board according to claim 1 is an aircraft warning sign board (10) attached to a substantially vertical plane in the vicinity of the top of the power transmission tower (2). Recognition unit (4) provided with a strip-like recognition surface (4a) that is elongated in the horizontal direction with surface treatment for improving the surface and horizontal direction with surface treatment for reducing the recognition property on one side A non-recognizing portion (6) having a non-recognizing surface (6a) that is long and narrow, and the recognizing surface has an angle that is easy to see from above the transmission line and difficult to see from the ground. Facing the diagonally upward direction, the non-recognizing surface is easily visible from the ground, and is facing obliquely downward at an angle that is difficult to see from above the transmission line, and the recognition unit and the non-recognition unit are continuous in the vertical direction. And appear alternately.

  According to a second aspect of the present invention, the long side of one end of the recognition unit (4) and the long side of one end of the non-recognition unit (6) are joined, and a pair of recognition unit and non-recognition unit is piled up. A mold is formed.

  The invention according to claim 3 is characterized in that the aircraft warning sign plate is formed by bending a single metal flat plate.

  The invention according to claim 4 is an aircraft warning sign plate (10) attached to a substantially vertical surface in the vicinity of the top of the power transmission tower (2), and is provided with a surface treatment on one side for improving the recognition. A recognition section (4) having a strip-like recognition surface (4a) that is elongated in the horizontal direction, and the recognition surface has an angle that is easy to see from above the transmission line and difficult to see from the ground. The recognition unit appears obliquely upward and appears in a louver shape that is continuous in the vertical direction.

  According to a fifth aspect of the present invention, the recognizing part (4) is attached to a base (8) that supports the recognizing part by using an inclination angle adjusting means (12) for adjusting the inclination angle. It is characterized by that.

  According to a sixth aspect of the present invention, the tilt angle adjusting means (12) includes a through-hole (14) provided in the horizontal direction of a base (8) formed in a frame shape, and the recognition portion (4). ) And a bolt hole (16) formed in the horizontal direction at substantially the center of both side surfaces on the short side, and a rotation fulcrum that penetrates the through hole of the base and is screwed with the bolt hole of the recognition part ( 18).

  The invention according to claim 7 is characterized in that the recognition surface (4a) of the recognition section (4) forms a curved surface.

  The invention described in claim 8 is characterized in that a reflecting mirror (22) is attached to the recognition surface (4a) of the recognition section (4).

  According to the first aspect of the present invention, in order to enhance the recognition from the sky, for example, the recognition surface with the surface painted in red or yellow is directed obliquely upward, while in order to reduce the recognition from the ground, for example, black, The non-recognition surface, which is painted in an environmentally harmonious color such as gray, brown, or green, faces downward, making it highly recognizable from aircraft such as helicopters flying over the sky. In addition, it is possible to provide an aircraft warning sign board that hardly affects the landscape.

  According to the invention described in claim 2, the aircraft warning sign plate is configured by joining and integrating the long side of one end of the recognition unit and the long side of one end of the non-recognition unit. The number of parts can be reduced, and the shape and structure of the sign can be simplified.

  According to the third aspect of the present invention, the aircraft warning sign plate can be easily produced by bending a single metal flat plate, and the production cost of the sign can be reduced. .

According to the invention described in claim 4, since the non-recognizing portion is not provided as in the invention described in claim 1 and only the recognition surface facing obliquely upward is formed, the recognizability is high from the sky, An aircraft warning sign board with low recognizability from the ground is provided. Here, the recognition surface cannot be seen by people on the ground, and only the space between the recognition unit adjacent to the bottom side and back of the recognition unit is visible, so the bottom side and back of the recognition unit are painted in an environmentally friendly color. It is preferable to do it.
Note that this aircraft warning sign plate can be produced by pressing a single metal plate to form a louver-like recognition portion.

  According to the fifth aspect of the present invention, the inclination angle of the recognizing unit can be adjusted by the inclination angle adjusting means, so that the individual transmission towers can be considered in consideration of the positional relationship between the transmission tower and the person on the ground. The inclination angle of the recognition unit can be adjusted so that the influence on the landscape is minimized.

  According to the invention described in claim 6, since the angle of each recognition surface can be adjusted by fixing the recognition unit to the base formed in a frame shape so that the angle can be freely adjusted using a bolt, Corresponding to the surrounding environment of each power transmission tower, the inclination of the recognition unit can be adjusted so that the recognition from the sky is high and the recognition from the ground is low.

  According to the seventh aspect of the present invention, the recognition surface of the recognition unit has a curved surface, so that even when an aircraft such as a patrol helicopter flies over the power transmission line and moves over the power transmission line, Since any one of the normal directions matches the line of sight of the pilot of the aircraft, the recognizability is high, and the recognizability can be improved under various weather conditions. Note that the recognition surface forming a curved surface may be convex upward or convex downward.

  According to the eighth aspect of the present invention, by attaching a colored or colorless reflecting mirror to the recognition surface, the recognizability of the recognition surface due to the reflection of sunlight is remarkably improved. In addition, since the recognition surface is inclined upward so as not to be seen from the ground, sunlight incident from above or from the side is not reflected to the ground.

  The aircraft warning sign plate of the present invention is mainly used by power companies for inspection of high-voltage power transmission towers (power transmission towers) that are power transmission facilities and transmission lines built between the power transmission towers. The helicopter that flies along the road is attached to a substantially vertical surface near the top of the power transmission tower to prevent contact accidents with the power transmission tower and to call attention to the nearby flying airspace. In addition, it has been devised so as to affect the scenery from the ground as much as possible.

  As schematically shown in FIG. 1, the power transmission tower 2 has four main pillars 11 supported at the lower end on the ground, and both ends are fixed between the standing main pillars. An abdominal member 13 made of a plurality of diagonal members and a horizontal member, and an arm metal member 15 fixed to an upstanding main column member, on which an overhead ground wire or a wire made of an electric wire (not shown) is laid It has.

  The main pillar 11 is composed of iron angle steel, a circular steel pipe or the like, and the lower end side is supported on the ground by concrete which is a basic structure. A square horizontal plane is formed so that adjacent main pillars are substantially equidistant, and each main pillar is erected substantially vertically upward.

  At the upper end of the four main pillars 11, a square pyramid-shaped steel tower tip 12 is formed which forms a truss structure by combining angle steel.

The aircraft warning sign plate 10 of the present invention is attached to a substantially vertical surface in the vicinity of the upper end (top) of the tip of the square pyramid tower.
Hereinafter, preferred embodiments of the aircraft warning sign plate of the present invention will be described with reference to the drawings.

FIG. 2 is a perspective view (FIG. 2 (a)) and an XX cross-sectional view (FIG. 2 (b)) showing a first embodiment of the aircraft warning sign board of the present invention.
The aircraft warning sign plate 10 shown in these figures is a corrugated plate in which long and narrow mountain-shaped irregularities are formed in a horizontal direction by bending a metal plate having a thickness of about 5 mm. It has a rectangular shape of about 60 cm.
As for the unevenness of the sign board, the recognition unit 4 having a horizontal strip-like recognition surface 4a horizontally applied with a surface treatment for improving the recognizability and a surface treatment for reducing the recognizability are applied to one surface. The non-recognizing portion 6 having the strip-shaped non-recognizing surface 6a elongated in the horizontal direction and the strip-shaped vertical portion 7 elongated in the horizontal direction are continuously formed.

The recognition surface 4a which is the surface of the recognition unit 4 is painted in a conspicuous color. Any color can be used as long as it is conspicuous, but in fact, it is necessary to convey information to the pilot that the airspace ahead of the power transmission tower is a flight caution airspace, a flight prohibition airspace, etc. Red or yellow is adopted.
This recognition surface 4a is obliquely upward so that it can be easily seen by the pilot of the helicopter flying over 20 meters of the transmission line along the transmission line, and is not visible to the person on the ground looking up the transmission tower from a distance. It is inclined so as to face. The inclination angle α is about 120 to 135 ° with respect to the vertically upward direction, but is preferably substantially parallel to the line-of-sight direction of the person on the ground in consideration of the positional relationship with the person on the ground.

The recognition surface 4a, which is the surface of the non-recognition unit 6, is painted in an environmentally harmonious color such as black, gray, brown, or green. This color is optimally adapted to the surrounding environment, but it is preferable to adopt a color with low saturation and lightness so as not to affect the landscape.
This non-recognizing surface 6a is obliquely downward so that it can be easily seen by people on the ground looking up at the transmission tower from a distance, and difficult to see from a helicopter pilot flying over the transmission line about 20 meters along the transmission line. It is inclined to face. This inclination angle β is about 120 to 135 ° with respect to the vertically downward direction.

  One recognition unit 4 and one non-recognition unit 6 form an angled portion 9 at an acute angle.

The surface of the vertical part 7 is painted in the same color as the non-recognizing part 6, and the normal of the surface of the vertical part is substantially horizontal. The vertical portion 7 is located between six mountain-shaped portions 9 arranged in the vertical direction. Since a certain distance is provided between the adjacent chevron portions 9 by the vertical portion 7, the recognition of the recognition surface by the shadow of the chevron portion located above is applied to the recognition surface 4 a of the lower chevron portion. The decline in sex can be reduced as much as possible.
In addition, a through hole 19 for attaching the aircraft warning sign plate 10 in the vicinity of the upper end (top) of the tower top 12 by bolts and nuts is formed in a part of the vertical portion 7.

  According to the aircraft warning sign plate 10 configured as described above, the pilot of the patrol helicopter mainly visually recognizes the recognition unit 4, while the person on the ground visually recognizes only the non-recognition unit 6, The pilot's attention can be drawn without affecting the landscape.

  Further, as shown in the drawing, it is also preferable to attach a reflecting mirror 22 colored red or yellow to the recognition surface 4a. The reflector 22 can be the same as that used for cars, bicycles, and the like. According to the reflecting mirror 22, the recognizability of the caution sign from the pilot is remarkably improved by the reflection of sunlight.

  As shown in FIG. 3, instead of creating an aircraft warning sign plate by bending a metal plate with a thickness of about 5 mm, a thin metal plate is bent to create a sign surface, and X It may be configured to be attached to the base 8 which is a rectangular metal flat plate having a side of about 40 cm x 60 cm and a thickness of about 5 mm. According to such a configuration, it is easy to create a sign surface, and it is also possible to reduce the weight of the attention sign plate by ensuring a certain level of strength. Further, it is possible to reduce the weight of the attention sign by punching processing that forms a plurality of holes in the base 8 (not shown).

  FIG. 4 is a perspective view (FIG. 4 (a)) and a sectional view taken along the line XX (FIG. 4 (b)) showing a second embodiment of the aircraft warning sign plate of the present invention. In addition, about the structure similar to Example 1 in a present Example, the code | symbol similar to FIG. 3 is attached | subjected, and the overlapping description is abbreviate | omitted.

  As shown in the figure, the aircraft warning sign board 10 includes a recognition unit 4 having a horizontal strip-like recognition surface 4a that has a surface treatment for improving the recognition property on one side, and a recognition property. A non-recognizing portion 6 having a strip-like non-recognizing surface 6a that is horizontally elongated and subjected to a surface treatment for lowering, and a base 8 that serves as a base for the recognizing portion 4 and the non-recognizing portion 6. Its size is almost the same size as the caution sign of Example 1.

The recognition unit 4 and the non-recognition unit 6 are formed by bending a thin metal plate, and the front end of the non-recognition unit 6 facing diagonally downward is oblique to the outside of the front end of the recognition unit 4 facing diagonally upward. It is in the shape of a receptacle extending upward.
The recognition surface 4a of the recognition unit 4 has a curved surface that protrudes upward as shown in the figure, but this curved surface is blocked by a non-recognition unit 6 that extends outward in the shape of a receptacle, so It is invisible. When the recognition surface 4a is curved, the recognition performance is improved even when an aircraft such as a patrol helicopter flies over the power transmission line and moves over the power transmission line.
By applying the same surface treatment to the recognition surface 4a as the recognition surface 4a on the back surface of the non-recognition portion 6 that continuously forms a V-shape with the recognition surface 4a and faces obliquely upward, the patrol helicopter and the like are located just above the attention sign Even when close to, the recognizability of the attention sign by the pilot can be ensured.

  FIG. 5 is a perspective view (FIG. 5 (a)) and a sectional view taken along line XX (FIG. 5 (b)) showing a third embodiment of the aircraft warning sign board of the present invention. In addition, about the structure similar to Example 1 in a present Example, the code | symbol similar to FIG. 3 is attached | subjected, and the overlapping description is abbreviate | omitted.

This aircraft warning sign plate 10 is produced by pressing a metal flat plate having a thickness of about 5 mm, and the size thereof is substantially the same as that of the first embodiment.
In this caution sign, a plurality of recognition units 4 having a horizontal strip-like recognition surface 4a extending in the horizontal direction appear in a louver shape continuously in the vertical direction, and between the adjacent recognition units 4 in the horizontal direction. An elongated space is formed. The louver-like recognition surface 4a faces obliquely upward at an angle that is easy to see from above and difficult to see from the ground (for example, about 120 to 135 ° with respect to the vertical upward direction). The front recognition surface 4a is painted in a conspicuous red or yellow color, and the rear surface of the recognition unit 4 is painted in an environmentally harmonious color.

  FIG. 6 is a perspective view showing a third embodiment of the aircraft warning sign plate 10 of the present invention.

  As shown in the figure, this aircraft warning sign board 10 includes a plurality of recognition units 4 each having a horizontal strip-like recognition surface 4a elongated in the horizontal direction, and a frame-shaped base 8 serving as a base for these recognition units 4. And a bolt 18 for attaching the recognition unit 4 to the base 8 so that the inclination angle can be adjusted. The size of the bolt 18 is substantially the same as that of the caution sign of the first embodiment.

The recognition unit 4 is a flat strip-like metal plate having a thickness of about 5 mm in the horizontal direction. The recognition surface 4a, which is the front surface, is painted in a conspicuous red or yellow color, and the back surface is painted in an environmentally harmonious color. .
Further, a bolt hole 16 in which a bolt groove is dug is formed in the horizontal direction substantially at the center of both side surfaces on the short side of the recognition unit 4.
The base 8 is a rectangular U-shaped frame formed by bending a metal flat plate having a thickness of about 5 mm, and a plurality of recognition units 4 are arranged in the vertical direction in a space surrounded by the frame. It has a size that can be. The horizontal length of the space surrounded by the frame is substantially the same as the horizontal length of the recognition unit 4, and both side surfaces on the short side of the recognition unit 4 are attached to the base in contact with the inside of the frame.
On both side surfaces of the base 8 in the vertical direction, a plurality of bolt holes 21 that are paired in the horizontal direction are formed at equal intervals.

The plurality of recognition units 4 arranged in a space surrounded by the frame body are fixed to the frame body by bolts 18 so as to have a desired inclination angle. That is, in the state in which the bolt 18 is loosened, the planar strip-shaped recognition unit 4 can rotate using the bolt 18 that passes through the bolt hole of the frame body and is screwed into the bolt hole 16 as a rotation fulcrum. When firmly tightened, the frame is fixed.
Therefore, according to the aircraft warning sign plate 10, the inclination angle of the recognition unit 4 can be adjusted so that the recognition surface 4a is least noticeable at the site in accordance with the local circumstances where the transmission tower is constructed.
In addition, if the recognition surface 4a of the recognition unit 4 located at the top is directed almost directly above, even if a helicopter for patrol is close to the top of the steel tower, the pilot recognizes the caution sign. The surface 4a can be recognized.

  In any of the embodiments described above, it is possible to improve the recognizability of the recognition surface from above by attaching a red or yellow reflecting mirror to the recognition surface or forming the recognition surface as a curved surface.

  As described above, according to the aircraft warning sign board of the present invention, it is highly recognizable from aircraft such as patrol helicopters, preventing contact accidents with power transmission towers and calling attention on the flight space. On the other hand, it is possible to provide a warning sign board for an aircraft having a simple structure that has little influence on the scenery of people on the ground.

  Of course, the shape or the like of the aircraft warning sign plate of the present invention can be changed as appropriate without departing from the spirit of the invention.

  The aircraft warning sign board of the present invention has been described as being mainly attached near the top of the power transmission tower, but the aircraft warning sign board of the present invention gives attention and information to the aircraft and also takes into account the landscape from the ground. However, the present invention is not limited to this, and can be applied to a high-rise structure such as a main tower of a suspension bridge.

It is the figure which represented the steel tower for power transmission typically. It is the figure which showed 1st Example of the warning sign board for aircrafts of this invention. It is the figure which showed the other form of 1st Example of the aircraft warning sign board of this invention. It is the figure which showed 2nd Example of the warning sign board for aircrafts of this invention. It is the figure which showed 3rd Example of the warning sign board for aircrafts of this invention. It is the figure which showed 4th Example of the warning sign board for aircrafts of this invention.

Explanation of symbols

2 Power transmission tower 4a Recognizing surface 4 Recognizing portion 6a Non-recognizing surface 6 Non-recognizing portion 7 Vertical portion 8 Base 9 Mountain-shaped portion 10 Aircraft warning sign plate 11 Main pillar material 12 Tower tip portion 13 Abdomen 15 Arm material 16 Bolt hole 18 Bolt 19 Through hole 21 Bolt hole 22 Reflector

Claims (8)

An aircraft warning sign plate (10) attached to a substantially vertical surface near the top of a power transmission tower (2),
A recognition unit (4) having a strip-like recognition surface (4a) elongated in the horizontal direction and subjected to a surface treatment for improving the recognition;
A non-recognizing portion (6) having a strip-shaped non-recognizing surface (6a) elongated in the horizontal direction and subjected to a surface treatment for lowering the recognizability;
The recognition surface faces obliquely upward at an angle that is easy to see from above the transmission line and difficult to see from the ground,
The non-recognition surface is easy to see from the ground and faces obliquely downward at an angle that is difficult to see from above the transmission line.
The aircraft warning sign board, wherein the recognition unit and the non-recognition unit appear alternately and continuously in a vertical direction.   The long side of one end of the recognition unit (4) and the long side of one end of the non-recognition unit (6) are joined, and the pair of recognition unit and non-recognition unit forms a mountain shape. The aircraft warning sign board according to claim 1.   3. The aircraft warning sign plate according to claim 1 or 2, wherein a single metal flat plate is bent. An aircraft warning sign plate (10) attached to a substantially vertical surface near the top of a power transmission tower (2),
A recognition unit (4) having a strip-shaped recognition surface (4a) that is elongated in the horizontal direction and has a surface treatment for improving the recognition property;
The recognition surface faces obliquely upward at an angle that is easy to see from above the transmission line and difficult to see from the ground,
The aircraft warning sign board, wherein the recognition unit appears in a louver shape continuous in a vertical direction.   The said recognition part (4) is attached to the base (8) which supports a recognition part using the inclination-angle adjustment means for adjusting the inclination-angle. Caution sign board for aircraft.   The inclination angle adjusting means is provided at substantially the center of the through-hole (14) provided in the horizontal direction of the base (8) formed in a frame shape and the both side surfaces on the short side of the recognition part (4). It is comprised from the bolt hole (16) each formed in the horizontal direction, and the volt | bolt (18) used as the rotation fulcrum which penetrates the through-hole of the said base, and is screwed together with the bolt hole of the recognition part. The aircraft warning sign board according to claim 5.   The aircraft warning sign board according to any one of claims 1 to 6, wherein the recognition surface (4a) of the recognition unit (4) forms a curved surface.   The caution sign board for an aircraft according to any one of claims 1 to 7, wherein a reflecting mirror (22) is attached to the recognition surface (4a) of the recognition unit (4).

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