EMERGENCY EXIT FOR BUS CEILING

Subject of the invention

This invention relates to the separation of the ceiling into at least three sections, and generating an emergency exit area in the composite ceiling buses as a result of the separation of the middle section, on which the air conditioner is mounted, from the ceiling in case of overturn, as a consequence of the forces affecting the ceiling and the weight of the air conditioner.

State of Prior art

There exist various emergency exit mechanisms in the buses in order to provide the evacuation of the passengers in case of a probable accident. Mostly, side windows are used as emergency exit areas by being broken with a special hammer.

Hinged and rail based mechanisms are used on the side windows which are used as the emergency exit areas. In these systems the side windows might be opened wholly by release lever and used as an emergency exit area. However, these systems, which are used on the side windows, can not be used efficiently in case of overturn of the bus .

The emergency exits that might be used efficiently in case of overturn of the bus are generated on the ceiling of the vehicle. In these systems which constitute the present state of art, there exist ceiling emergency exit sections which

might be opened manually and which constitute the required space for the evacuation of the passengers.

However, these mechanisms which are required to be opened manually and which are used on the profile structured ceilings not only result in time loss in emergency situations but also might get stuck and not open because of the accident .

Although, these types of systems, which require the cover to be opened manually, are used in composite ceiling buses, they might become unserviceable as a result of the composite ceiling's breakdown at the moment of overturn.

In the present state of art, composite ceiling applications consist of a single piece and it is not supported by any ceiling profile structures. For this reason, fractures occur at the moment of overturn on the air conditioner montage points because of both the weight of the air conditioner and the forces that affect the ceiling. As a result, these disorderly occurred fractures go along the ceiling disorderly and cause the ceiling to break by smashing. The breakdown of the ceiling causes the probable emergency exit areas to become unserviceable while causing a security problem by creating a strength loss in the side walls of the buses.

With the ceiling application including a ceiling emergency exit on the ceiling which is the subject of the invention, an emergency exit is generated which might be used efficiently in case of overturn.

Detailed Description of the invention

This invention relates to; separation of the composite ceiling into at least three sections (1, 2, 3), separation of the weakest resistant section (2), on which the air conditioner is mounted, properly and primarily in comparison to the other sections by the effect of the forces affecting the ceiling and the weight of the air conditioner (4) , therefore generating the necessary emergency exit area (5) which is required for the evacuation of the passengers. In the mentioned application, at the moment of overturn, an emergency exit area (5) is being created on the bus ceiling by the separation of the middle section. (Figure 1)

The mentioned ceiling, on which the emergency exit is placed, consists of three sections (Figure 3) . The middle section (2) between the front (1) and (3) back sections is the section on which the air conditioner (4) is mounted as it might be seen in Figure 2; and it is separated from the front (1) and back (3) sections with profiles (6) (Figure 4) .

This middle section (2) is the section which will be forced to breakdown by the forces affecting the ceiling and will not be able to resist much and will snap. The reason of this situation is that, a breaking line is generated on the ceiling by means of the profiles (6) which separates the middle section (2) from the front and back sections. Therefore, the forces which affect the ceiling in case of overturn of the bus, cause a breakdown along this line that has the minimum resistance and provides the middle section (2) to separate from the ceiling properly.

This empty space, which is created by the separation of the middle section, generates an emergency exit area in order to be used in case of overturn of the bus. Since the ceiling emergency exit area (5) , which is the subject of the invention, does not have an estimated cover to be opened manually, it does not cause time loss during an accident.

Brief Description of the Drawings

Figure 1: Demonstration of bus ceiling emergency exit area

Figure 2 : The case of overturn of a bus that has a composite ceiling consisting of front, back and middle sections

Figure 3: Composite ceiling consisting of front, back and middle sections

Figure 4 : Separation profiles

References

1. Front section

2. Middle section

3. Back section

4. Air conditioner

5. Emergency exit area

6. Separation profiles