JP2574106Y2 - Automotive ceiling structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile ceiling structure, and more particularly to a bus ceiling structure.

[0002]

2. Description of the Related Art Conventionally, the structure of a ceiling 2 of a bus 1 is as follows.
For example, as shown in FIG. 3, a frame 4 is assembled from a plurality of iron square pipes 3, and a steel plate 5 having a predetermined thickness is attached to the frame 4 by spot welding or the like.

[0003]

[Problems to be Solved by the Invention] However, the roof 1 having the above structure has a large body weight, and particularly in the case of a high decker type bus having a higher height than a normal bus or the like, the weight of the ceiling 1 is large. Inevitably, the center of gravity increases as the vehicle size increases, and there is a problem that the vehicle height is restricted. Recently, many chandeliers, televisions, and the like are mounted on the ceiling, and the weight of the ceiling tends to increase.

The present invention has been devised in view of such a conventional problem, and it is possible to reduce the weight of a vehicle roof while maintaining the same strength, thereby lowering the center of gravity. In particular, it is an object of the present invention to eliminate restrictions on the vehicle height even in the case of a high decker type having a higher vehicle height than an ordinary bus or the like.

[0005]

According to the present invention, in order to achieve the above object, a ceiling of an automobile is impregnated with a phenol resin.
Use this paper core
The invention is characterized in that the upper and lower surfaces are constituted by a honeycomb panel having a sandwich structure made of a composite material in which thin steel plates are joined via an adhesive.

[0006]

The present invention is constructed as described above. In particular, the ceiling of a high decker type bus, which has a higher height than a normal bus or the like, is formed by a honeycomb panel having a sandwich structure, thereby achieving a conventional automobile ceiling. The weight can be significantly reduced compared to the weight, which allows the position of the center of gravity to be lowered.
In addition, heat retention and high rigidity can be achieved.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view of an automotive ceiling embodying the present invention, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and the ceiling 10 has upper and lower surfaces of a core 11 as shown in FIG. It is constituted by a honeycomb panel 13 having a sandwich structure formed by joining the steel plates 12a and 12b via an adhesive (not shown) having an epoxy structure.

In this embodiment, a paper core impregnated with a phenol resin is used for the core 11, the core cell size is Φ5 to 12.5 mm, and the core thickness is 12 to 4 mm.
The impregnation amount of 0 mm and phenol resin is 5 to 20%. The cell size, core thickness, and impregnation amount of the phenol resin for the core 11 are not limited to those in the above-described embodiment.

In this embodiment, the steel plates 12a and 12b are made of a surface-treated steel plate (zinc steel plate), and the thickness of the face plate is 0.4 to 1.0 mm on the outside and 0.2 to 0.4 mm on the inside. Things. The ceiling 10 configured as described above
Is fixed to the ceiling portion of the vehicle with a plurality of bolts 14 and the like, and in particular, the ceiling 10 of a high decker type bus having a height higher than that of a normal bus or the like is formed by a honeycomb panel having a sandwich structure. Can be significantly reduced in weight compared to the weight of the car ceiling, thereby lowering the position of the center of gravity, so that the height of the vehicle is not restricted and the heat retention and rigidity can be improved. Things.

[0010]

[Effect of the invention] In the invention, the vehicle height is normal as described above .
High-decker-type bus car ceiling
When using paper cores impregnated with
In addition, since the honeycomb panel is formed of a sandwich structure made of a composite material in which a thin steel plate is bonded to the upper and lower surfaces of the paper core via an adhesive, the following excellent effects are obtained. (A). The weight of the vehicle can be significantly reduced compared to the weight of the conventional car ceiling, and the center of gravity can be lowered especially for the high decker type bus ceiling, which has a higher height than a normal bus. Can be stabilized without any restrictions. (B). Since there is an air layer in the honeycomb panel of the sandwich structure constituting the ceiling, the heat retention is improved. (C). The same high rigidity was achieved as before, so vibration,
Harshness is reduced and ride comfort is improved. (D). The outside of the ceiling is smooth and the appearance is good.

[Brief description of the drawings]

FIG. 1 is a plan view of a vehicle ceiling embodying the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a perspective view showing a ceiling portion of a conventional bus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Ceiling 11 Core 12a, 12b Steel plate 13 Honeycomb panel

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-3-90468 (JP, A) JP-A-2-225747 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B62D 31/02 B62D 25/06

Claims (1)

(57) [Scope of request for utility model registration] 1. A high decker type vehicle having a higher vehicle height than usual.
In the structure of an automobile ceiling for a bus, a ceiling impregnated with a phenol resin is used for the automobile ceiling.
Use per core and top and bottom of this paper core
And a honeycomb structure having a sandwich structure made of a composite material in which thin steel plates are joined together via an adhesive.