JPS6137534Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a roof ventilator for introducing outside air into the vehicle interior from the front end of the roof of large trucks, buses, special vehicles, etc.

In large trucks and the like, outside air is often taken into the vehicle interior through a roof ventilator that opens at the front end of the roof.

A conventional roof ventilator A of this type has a cover attached to the front end of the roof 2 of the vehicle body 1, as shown in FIG. Attach 3 and
An outside air inflow side opening 4 is formed, and outside air is introduced into the vehicle interior 6 through an air port 5 that vertically penetrates a part of the roof 2.

The conventional roof ventilator A has air flow a parallel to the ground surface relatively generated by the running of the vehicle body 1.
An opening 4 is formed in a direction substantially perpendicular to the air flow a so that air can be taken in.

However, the front part of the vehicle body 1 has at least the windshield 7 slanted rearward toward the top in order to reduce air resistance during driving. A strong air flow b that hits the front part of the vehicle body and rises along the surface of the windshield 7, which is much larger than the opening area, prevents air from flowing into the roof ventilator A. Furthermore, the airflow b flowing from the front of the vehicle body upward to the roof 2 generates a large vortex c, which causes an increase in air resistance against the vehicle body 1 during running. This air resistance is determined by the height H ₁ of the cover 3 forming the roof ventilator A.
If the distance is about 150 mm from the upper end of the roof 2, the amount of protrusion of the cover 3 will increase by about 10% compared to the case where the amount of protrusion is zero.

On the other hand, in the case of large trucks, it is mandatory to install a speed indicator light 8 that indicates the running speed in three stages, and the speed indicator light 8 consisting of three rows must be installed at the center of the front end of the roof 2 of the vehicle body 1. .

Therefore, it is difficult to reduce the height _H1 of the cover 3 because three speed indicator lights 8 are installed at intervals in the opening 4 of the roof ventilator A so as to face forward.

Further, the air vent 5 provided on the roof 2 inside the cover 3 has a drainage wall 9 projecting upright from the mouth edge so as to prevent rainwater from flowing into the passenger compartment 6. However, the lower end of the opening 4 and the cut wall 9
There was also the problem that the difference in height between the top and the top of the pipe was relatively small, making it difficult to see much of a draining effect.

Furthermore, as a roof ventilator, it was
What is disclosed in Publication No. 9516 is that a marker light installed on a mounting base protrudes from the front of the roof, and airflow rises along the windshield surface below the glass and airflow hits the glass. These eddy currents cause turbulence flowing upward from both sides of the mount, which disturbs the air flow on the upper surface of the roof and causes an increase in air resistance.

Based on the above-mentioned viewpoints, the present invention provides a roof ventilator for large trucks, etc., which can solve all of the above-mentioned problems. The cover is arranged in parallel and tilted downward, and the plate thickness end surface of the cover and the inclined surface define an obliquely downward-directed outside air inflow side opening, and the outside air inflow side opening is provided on the roof inside the cover. a plurality of speed indicator light storage recesses formed at a position lower than the wall and spaced apart in the vehicle width direction at the front part of the cover;
This is a roof ventilator for a truck or the like, in which a speed indicator lamp is housed and mounted in these speed indicator lamp storage recesses so that the tip and upper surface of the speed indicator lamp do not protrude from the front and above the sloped surface of the front part of the cover.

An embodiment of the roof ventilator of the present invention will be explained with reference to the drawings. The roof ventilator B of the present invention is shown in a front view in a state where it is attached to a vehicle body in FIG. 3, and in a vertical side view in FIG. The front part of the attached cover 3 is inclined so as to be substantially parallel to the sloped surface of the front part of the roof 2, and the thickness end surface of the cover 3 and the sloped surface define an outside air inflow side opening 4 that faces diagonally downward. There is.

In addition, speed indicator light storage recesses 10, 10, 10 for storing and mounting speed indicator lights 8, 8, 8 are formed in the front part of the cover 3 of the roof ventilator B at intervals in the vehicle width direction. The front surface of the speed indicator light 8 stored and attached to each of the indicator light storage recesses 10, 10, 10 is located in the speed indicator light storage recess 10.
The upper surface of the speed indicator light 8 is prevented from protruding further forward than the upper surface of the cover 3.

The roof 2 is provided with an air port 5 that allows outside air to flow into the vehicle interior 6, and a raised water wall 9 is assembled and protruded from the edge of the air port 5, and the outside air inlet side opening 4 is It is formed at a position lower than this water cut wall 9.

The height of the cover ₃ from the top of the roof 2, indicated by H2 in Figure 3, is the same as that of the conventional roof ventilator A.
This is significantly reduced compared to the height _H1 at .

Since the present invention is constructed as described above, when the vehicle body 1 runs, the air flow a that flows parallel to the ground surface relative to the vehicle body 1 collides with the front of the vehicle body and hits the inclined surface of the windshield 7. A portion of the air flow b, which is a strong upward flow along the vehicle, flows straight into the outside air inflow side opening 4 and flows into the vehicle interior 6 from the air port 5.

The other part of the air flow b flows directly onto the roof 2, and the air flow a parallel to the ground surface flows smoothly along the upper surface of the front part of the cover 3. Since the front edge of the cover 3 is thin-walled, the air that hits the front edge of the cover 3 can flow into the outside air without causing any resistance. Side opening 4
The air flows over the roof 2 along the upper surface of the front part of the cover 3, and almost no vortex is generated due to the merging of the air flow a and the air flow b.

In addition, since the speed indicator light 8 is provided outside the outside air inflow side opening 4, the height _H2 of the cover 3 is significantly reduced compared to the height _H1 of a conventional cover, and the air resistance when the vehicle is running is reduced by the roof. As far as the ventilator part is concerned, it is significantly smaller and the outside air inlet side opening 4 is located low, so the drainage effect by the drainage wall 9 is reliable.

As is clear from the above explanation, the roof ventilator of the present invention can effectively utilize the airflow rising along the sloped surface at the front of the vehicle body as ventilation air. Since it is possible to avoid confusion in the air flow in front of the opening, it is also possible to prevent the generation of vortices, which is one of the causes of increased air resistance when the vehicle is running. The cover was installed in the speed indicator light storage recesses formed at intervals in the vehicle width direction to prevent it from protruding forward and upward of the sloped surface of the front part of the cover, which caused an increase in air resistance. The height is reduced, and sufficient airflow space is secured between the speed indicator lamp housing recesses formed at intervals in the vehicle width direction without forming any protruding parts that would obstruct airflow. This has excellent advantages such as no rainwater flowing into the vehicle interior.

[Brief explanation of the drawing]

Figures 1 and 2 show the conventional roof ventilator installed on the vehicle body. Figure 1 is a front view, Figure 2 is a vertical side view, and Figures 3 and 4 are the roof ventilators of the present invention. FIG. 3 is a front view, and FIG. 4 is a longitudinal side view, showing the state in which it is attached to a vehicle body. 1...Vehicle body, 2...Roof, 3...Cover, 4
...Outside air inflow side opening, 5...Air vent, 6...Vehicle interior, 7...Windshield, 8...Speed indicator light,
9... Rise cut wall portion, 10... Speed indicator light storage recessed portion.

Claims (1)

[Scope of utility model registration request] The front part of the cover attached to the roof of the vehicle body is tilted so as to be substantially parallel to the slope of the front part of the roof, and the thickness end face of the cover and the slope form an opening on the outside air inflow side that faces diagonally downward. The outside air inflow side opening is formed at a position lower than a rising water cutout provided on the roof in the cover, and a plurality of speed indicator lights are stored at intervals in the vehicle width direction in the front part of the cover. A truck, etc., in which a speed indicator lamp is housed and installed in such a manner that a concave part is formed and the tip and upper surface of the speed indicator lamp do not protrude from the front and above the sloped surface of the front part of the cover. Roof ventilator.