JPH11293631A - Wind shield - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the quantity of crosswind on the upper face of a structure by connecting air intake ports provided on the side part of a structure to air blowout ports upward opening through ducts. SOLUTION: Many air intake ports 2 receiving crosswind W are provided in a line on the side part of a structure such as a bridge girder 1, and air blowout ports 3 opening upward are formed on the upper face of the side part of the bridge girder 1. The air intake port 2 and the air blowout port 3 are connected together through a duct 4. Then, when the crosswind W blows, air flowing in from the air intake port 2 passes through the duct 4, and blows out upward from the air blowout port 3. Hereby, the quantity of crosswind W on the road 5 on the upper face of the bridge girder 1 is reduced, and safety of running of a vehicle 6 and the like can be assured. It is unnecessary to provide a high wind shield wall on the side part of the bridge girder 1, and degradation of sceneries and wind resisting stability can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a windshield used as windbreak means for bridges, roads and the like. The present invention can also be applied to the edge of a building roof (land roof).

[0002]

2. Description of the Related Art FIG. 8 shows a conventional windbreak fence F generally used. By installing a windbreak fence F as a shielding plate or a transmission plate on both sides of the road in order to prevent the wind, it is possible to block or reduce the crosswind blowing on the road. However, since the conventional wind shield wall stands on the side of the road, there is a problem that the surrounding landscape is blocked and the scene cannot be enjoyed. Further, when a strong wind such as a typhoon or a seasonal wind blows, it is necessary to secure the strength of the wind shield wall against strong winds even though the vehicle is not traveling and no wind shield wall is required. Furthermore, when a wind shield wall is installed on a bridge or the like, there is a problem that the wind resistance stability of the bridge in a strong wind tends to deteriorate.

Further, as shown in FIG.
When a is provided, since a wall is provided on the road side to the periphery of the pier tower 8 or the like, a sharp decrease in the wind speed (at the wake of the tower) is caused, and the traveling performance of the vehicle is reduced. There is a problem of becoming unstable.

[0004]

SUMMARY OF THE INVENTION The present invention improves the wind resistance without obstructing the landscape by appropriately guiding the flow of air flowing into structures such as bridges and buildings according to the direction of the wind. An object of the present invention is to provide a windshield that can be achieved.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a windshield according to the present invention is provided with an air inlet provided on a side portion of a structure and an upward opening on an upper surface of the structure. An air outlet formed as described above and a duct connecting the air inlet and the air outlet are provided.

In the above-described windshield of the present invention, when the cross wind blows, the wind flows in from the air inlet on the side of the structure,
Since the air that has passed through the duct in the structure is blown upward from the air outlet on the upper surface of the structure, the amount of crosswind in the structure (the road or the roof of the building) is reduced.

In addition, there is no need to provide a wind shield wall of sufficient height on the side of the structure to receive a cross wind, so that the landscape and wind stability are not deteriorated. In addition, since the wind acting on the wind shield wall when the wind is strong is smaller than in the conventional case, it is advantageous from the viewpoint of strength design.

[0008] Further, the above structure is constituted as a bridge girder,
If a damper is provided in the middle part of the duct to enable the flow rate to be adjusted, the amount of air passing through the duct is increased when a sufficient wind shielding effect is desired. It is possible to reduce the amount of wind passing through the bridge and minimize the deterioration of wind resistance as a bridge.

Further, in the windshield of the present invention, an air intake for receiving a cross wind is formed on an outer wall of the pier tower supporting the bridge girder, and the air flowing into the pier tower through the air intake is formed. A horizontal slit-shaped air outlet for horizontally blowing the bridge girder onto the road is formed in the road-side wall of the pier tower.

[0010] In the windshield of the present invention described above, the crosswind that has flowed into the air intake in the outer wall of the pier tower is a portion of the pier tower adjacent to the bridge girder on the road side of the pier tower. The horizontal slit-shaped air outlet formed on the road allows the air to be blown horizontally onto the road, which increases the crosswind on the road that was blocked by the pier tower. The upper wind speed becomes almost uniform. Therefore, the traveling stability of the vehicle traveling on the road is improved.

In the windshield of the present invention, an air intake for receiving a cross wind is formed on an outer wall portion of a pier tower supporting a bridge girder, and air flowing into the pier tower through the air intake is formed. An air outlet for blowing air to the road side of the bridge girder is formed on the road side wall of the pier tower, and a baffle plate for guiding the flow of air blown from the air outlet in the bridge axis direction is provided by the air blower. It is characterized in that it is arranged at a position slightly separated from the front of the exit.

In the windshield of the present invention described above, the cross wind that has flowed into the air intake in the outer wall of the pier tower is a portion of the pier tower and the bridge girder adjacent to each other, and the wall on the road side of the pier tower. When the air is blown out from the air outlet formed in the section, it hits a baffle plate slightly separated from the front of the air outlet and becomes a flow that is bisected in the bridge axis direction.These air flows and the crosswind near the pier tower Interference, which causes the strength of the crosswind blowing onto the road to gradually decrease as it approaches the pier tower. In this way, it is possible to prevent the wind speed on the road from suddenly changing near the pier tower, so that the running stability of the vehicle traveling on the road is improved.

Further, the windshield of the present invention is provided with a nose member having a concave curved surface for changing a cross wind into an upward flow at a side portion of the bridge girder, and the nose member is rotated to be stored inside the bridge girder. A nose member storage mechanism is provided.

In the above-described windshield of the present invention, when the crosswind blowing on the bridge girder becomes strong and it becomes necessary to increase the running stability of the vehicle traveling on the road on the bridge girder, the nose member is rotated from the storage portion in the bridge girder. The nose member moves and stands up, and the concave curved surface of the nose member converts the crosswind flow into an upward airflow.

In this way, while the safety of the traveling vehicle is enhanced, the nose member is kept in the retracted state in the bridge girder in an area or time zone where the wind speed is not required to be reduced. Thus, the use of the nose member prevents the bridge girder from deteriorating the wind resistance.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view of a bridge girder having a windshield according to a first embodiment of the present invention; FIG. FIG. 3 is a schematic cross-sectional view of a bridge girder having a windshield as a second embodiment of the present invention, and FIG. 3 is a perspective view schematically showing a main part of a bridge girder having a windshield as a third embodiment of the present invention. FIG. 4 shows a fourth embodiment of the present invention.
FIG. 5 is a perspective view schematically showing a main part of a bridge girder having a windshield as an embodiment. FIG. 5 is a schematic cross-sectional view of a bridge girder having a windshield as a fifth embodiment of the present invention. FIGS. 7A and 7B are explanatory views showing the operation state of the nose member in FIG. 5, and FIG. 7 is a perspective view of FIG. 6B.

First, a first embodiment of the present invention will be described. As shown in FIG. 1, a large number of air intakes 2 for receiving a cross wind W are arranged in a row on a side of a bridge girder 1 as a structure. An air outlet 3 opening upward is formed on the upper surface of the side of the bridge girder 1. The air inlet 2 and the air outlet 3 are connected via a duct 4.

In the second embodiment of the present invention, as shown in FIG. 2, a damper 7 capable of adjusting a flow rate is provided at an intermediate portion of the duct 4 in the same configuration as that of the first embodiment. Is equipped.

In each of the windshields according to the first and second embodiments of the present invention described above, when a cross wind blows, wind flows in from the air inlet 2 on the side of the bridge girder 1 and passes through the duct 4 in the bridge girder 1. The blown air is blown upward from an air outlet 3 on the upper surface of the bridge girder 1. As a result, the amount of crosswind on the road 2 on the upper surface of the bridge girder 1 is reduced, and the traveling safety of the vehicle 6 is maintained.

Since there is no need to provide a wind shield wall having a sufficient height on the side of the bridge girder 1 to receive the cross wind, the landscape and the stability of wind resistance do not deteriorate. In addition, the wind acting on the wind shield wall when the wind is strong is also smaller than in the conventional case, which is advantageous from the viewpoint of strength design.

Also, as in the second embodiment shown in FIG.
When the damper 7 is provided in the middle part of the duct 4 and the flow rate can be adjusted, when it is desired to obtain a sufficient wind shielding effect, the amount of air passing through the duct 4 is increased, and when the wind shielding effect is not required. By reducing the amount of air flowing through the duct 4, it is possible to minimize possible deterioration of wind resistance as a bridge.

Next, a description will be given of a windshield as a third embodiment of the present invention. As shown in FIG. 3, a horizontal slit-like shape receiving a cross wind is provided on an outer wall of a pier tower 8 supporting a bridge girder 1. An air inlet 9 is formed, and a horizontal slit-shaped air outlet 10 for horizontally blowing air flowing into the pier tower 8 through the air inlet 9 onto the road 5 of the bridge girder 1 is provided with a pier tower. 8 is formed on the wall on the road side. On both sides of the road 5, wind shield walls 10a having horizontal slits are erected.

In the windshield according to the third embodiment described above, the cross wind flowing into the air intake 9 in the outer wall of the pier tower 8 causes the pier tower 8 and the bridge girder 1 to be adjacent to each other at the portion adjacent to each other. 8 is horizontally blown out onto the road 5 from a horizontal slit-shaped air outlet 10 formed in the wall portion on the road side.

The road 5 blocked by the pier tower 8
Since the upper cross wind is accelerated, the wind speed on the road 5 near the pier tower 8 becomes substantially uniform. Therefore, the traveling stability of the vehicle traveling on the road 5 is improved.

Next, a windshield as a fourth embodiment of the present invention will be described. As shown in FIG. 4, also in this embodiment, a cross wind is applied to the outer wall of the pier tower 8 supporting the bridge girder 1. While the air intake 11 is formed,
An air outlet (not shown) for blowing out the air flowing into the pier tower 8 through the air intake 11 toward the road 5 side of the bridge girder 1 is formed in the wall of the pier tower 8 on the road 5 side. A baffle plate 12 for guiding the flow of air blown out from the air outlet in the bridge axis direction is provided at a position slightly separated from the front surface of the air outlet.

In the windshield of the fourth embodiment described above, the cross wind flowing into the air intake port 11 on the outer wall of the pier tower 8 causes the pier tower 8 and the bridge girder 1 to be adjacent to each other at the portion adjacent to each other. When the air is blown out from the air outlet formed on the wall of the road 5 on the road 5 side, it hits a baffle plate 12 slightly separated from the front surface of the air outlet and forms a flow divided into two in the bridge axis direction. The current interferes with the crosswind near the pier tower 8,
As a result, the strength of the cross wind blowing on the road 5 is increased by the pier tower 8
It gradually decreases as it approaches. In this way, it is possible to prevent the wind speed on the road 5 from changing abruptly in the vicinity of the pier tower 8, so that the running stability of the vehicle traveling on the road 5 is improved.

Next, a description will be given of a windshield as a fifth embodiment of the present invention. As shown in FIG.
A nose member 13 having a nose member 13 is provided. When the nose member 13 is not used, the nose member 13 is rotatably stored inside the bridge girder 1 via the rotary shaft 14 as shown in FIG. .

A cover 16 is provided on a hole of the nose member 13 in which the nose member 13 protrudes and retracts. Cover 16 is a pivot
As shown in FIGS. 6B and 7, when the nose member 13 is used, the nose member 13 is turned by the turning shaft 17 with the driving device 18 to be in an open state. FIG.
In the use state of the nose member 13 shown in FIG. 7B and FIG. 7, a stopper (not shown) is used so that the nose member 13 can be held upright.

In the windshield of the fifth embodiment described above, when the cross wind blowing on the bridge girder 1 becomes strong and it becomes necessary to increase the running stability of the vehicle traveling on the road on the bridge girder 1, the nose member 13 is attached to the bridge girder 1. The nose member 13 is turned upright from the storage portion, and the concave curved surface 13a of the nose member 13 converts the crosswind flow into an upward airflow a.

In this way, while the safety of the traveling vehicle is improved, the nose member 13 is kept in the retracted state in which the nose member 13 is turned into the bridge girder 1 in an area or time zone where the wind speed reduction is not required on the bridge girder 1. Therefore, deterioration of the wind resistance of the bridge girder 1 due to the use of the nose member 13 can be avoided.

[0031]

As described above, according to the windshield of the present invention, the following effects can be obtained. (1) When a cross wind blows, the wind flows in from the air inlet on the side of the structure, and the air that has passed through the duct inside the structure is blown upward from the air outlet on the top of the structure. The amount of crosswind on an object (a road or the roof of a building) is reduced. Further, there is no need to provide a wind shield wall of sufficient height on the side of the structure to receive the cross wind, so that the landscape and the stability of the wind resistance do not deteriorate. And since the wind acting on the windshield during strong winds is smaller than in the past,
This is advantageous from the viewpoint of strength design. (2) If the above structure is configured as a bridge girder and a damper is provided in the middle of the duct to enable adjustment of the flow rate, it is necessary to increase the amount of air passing through the duct when obtaining a sufficient wind shielding effect. When there is no need for a wind-shielding effect, it is possible to reduce the amount of air passing through the duct and minimize the deterioration of wind resistance as a bridge. (3) Cross-wind that has flowed into the air intake on the outer wall of the pier tower forms horizontal slit-like air formed on the road-side wall of the pier tower at the part adjacent to the pier tower and the bridge girder. If the air is blown out horizontally onto the road from the outlet, the crosswind on the road blocked by the pier tower is increased, so that the wind speed on the road near the pier tower becomes almost uniform. Therefore, the traveling stability of the vehicle traveling on the road is improved. (4) The crosswind that has flowed into the air intake on the outer wall of the pier tower is adjacent to the pier tower and the bridge girder, and from the air outlet formed on the road side wall of the pier tower. When the air is blown out and hits a baffle slightly separated from the front of the air outlet, it becomes bifurcated in the direction of the bridge axis.These air flows interfere with the crosswind near the pier tower, thereby increasing the strength of the crosswind blowing on the road. Will gradually decrease as you approach the pier tower. In this way, it is possible to prevent the wind speed on the road from suddenly changing near the pier tower, so that the running stability of the vehicle traveling on the road is improved. (5) If the crosswind blowing on the bridge girder becomes stronger and it becomes necessary to increase the running stability of vehicles traveling on the road on the bridge girder, the nose member rotates from the storage section in the bridge girder and stands up,
When the function of converting the crosswind flow into an upward airflow is performed by the concave curved surface of the nose member, the safety of the traveling vehicle is enhanced. And, in the area and time zone where the wind speed reduction is not required on the bridge girder, since the nose member is kept in the retracted state rotated into the bridge girder, the use of the nose member deteriorates the wind resistance stability of the bridge girder. Will be avoided.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a bridge girder having a windshield as a first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of a bridge girder having a windshield as a second embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view of a bridge girder having a windshield according to a third embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view of a bridge girder having a windshield according to a fourth embodiment of the present invention.

FIG. 5 is a schematic cross-sectional view of a bridge girder having a windshield according to a fifth embodiment of the present invention.

6 (a) and 6 (b) are explanatory views showing the operation state of the nose member in FIG.

FIG. 7 is a perspective view of FIG. 6 (b).

FIG. 8 is a cross-sectional view showing an example of a conventional bridge girder.

FIG. 9 is a perspective view showing a part of a conventional bridge girder with a pier tower.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bridge girder 2 Air inlet 3 Air outlet 4 Duct 5 Road 6 Vehicle 7 Damper 8 Pier tower 9 Air inlet 10 Air outlet 10a Wind barrier 11 Air inlet 12 Baffle plate 13 Nose member 13a Concave curved surface 14 Rotation Axis 15 Drive 16 Cover 17 Rotating axis 18 Drive F Windbreak f W Crosswind a Upflow

Claims (5)

[Claims] 1. An air inlet provided on a side of a structure, an air outlet formed to open upward on an upper surface of the structure, and the air inlet and the air outlet described above. A windshield, characterized by having a duct for connecting with the windshield. 2. The windshield according to claim 1, wherein the structure is configured as a bridge girder, and a damper capable of adjusting a flow rate is interposed at an intermediate portion of the duct. 3. An air intake for receiving a cross wind is formed on an outer wall of the pier tower supporting the bridge girder, and air flowing into the inside of the pier tower through the air intake is formed on a road of the bridge girder. A windshield, wherein a horizontal slit-shaped air outlet for blowing out horizontally is formed in a wall on the road side of the pier tower. 4. An air intake for receiving a cross wind is formed on an outer wall portion of the pier tower supporting the bridge girder, and air flowing into the inside of the pier tower through the air intake is directed to a road side of the bridge girder. An air outlet for blowing is formed on a road side wall of the pier tower, and a baffle plate for guiding a flow of air blown from the air outlet in a bridge axis direction is slightly separated from a front surface of the air outlet. A windshield, which is disposed at a position. 5. A nose member storing mechanism which is provided on a side portion of a bridge girder with a nose member having a concavely curved surface for changing a cross wind into an upward flow, and which can rotate the nose member to be stored inside the bridge girder. A windshield, characterized in that a windshield is provided.