JPH0840072A - Door structure for automobile - Google Patents

Abstract

PURPOSE:To provide a door structure for an automobile which is improved so as to enhance absorbing efficiency of input from the side. CONSTITUTION:In a door structure for an automobile where a closed cross-sectional part 6 is formed of a door outer panel 3 and a reinforcement 3a and input from the side is absorbed, a recessed part where the inside of the interior is recessed is arranged in a longitudinal directional prescribed part of the reinforcement to form the closed cross-sectional part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile door structure constructed so as to efficiently disperse lateral inputs.

[0002]

2. Description of the Related Art As a door reinforcing structure, it is known to weld a reinforcement to the inner surface of an outer panel or an inner panel to form a frame structure having a closed cross section inside the door (Japanese Patent Laid-Open No. 62-62-62). 103222). This conventional structure is mainly intended to increase rigidity.

[0003]

However, in the conventional structure disclosed in the above publication, the deformability of the door when the input is made from the inside of the vehicle is not particularly taken into consideration.

The present invention has been devised in view of the above circumstances, and its main purpose is to disperse the input energy from the outside of the vehicle compartment with high rigidity and the energy for the input from the inside of the vehicle compartment. It is an object of the present invention to provide an improved automobile door structure so that the absorption stroke can be increased.

[0005]

According to the present invention, such an object is for an automobile in which a door outer panel and a reinforcement form a closed cross section to disperse a lateral input. By providing a door structure for a vehicle, characterized in that a recessed portion that is recessed in a vehicle interior side is provided at a predetermined portion in the front-rear direction of the reinforcement forming the closed cross-section. To be achieved.

[0006]

According to such a structure, the energy can be efficiently dispersed with the high rigidity of the closed cross section for the input from the outside of the vehicle interior, and the closed cross section can be efficiently received for the input from the inside of the vehicle interior. Since the energy absorption stroke can be secured by the concave portion of the groove, the energy absorption efficiency can be maximized within a limited size.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described in detail below with reference to specific embodiments shown in the accompanying drawings.

1 and 2 show a cross section of a main part of a door constructed according to the present invention. FIG. 1 is a partial vertical cross section of the upper side of the door main body, and FIG. 2 is II-II of FIG. A line cross section is shown. The door 1 is composed of an outer panel 3 on the outside and an inner panel 4 on the inner side with the accommodation portion of the side glass 2 as a boundary. By joining the reinforcements 3a and 4a to a specific portion, the front and rear direction is obtained. Closed cross-section portions 6 and 7 are formed.

The closed cross section 7 on the inner panel side is formed of a reinforcement 4a having a relatively high rigidity on the outer side. By appropriately setting the plate thickness and the cross sectional shape, an input from the outside of the vehicle compartment can be obtained. You can take it. The inner side is formed with a relatively large radius and is relatively easily deformed. A cushion pad 8 is sandwiched between the closed cross-section portion 7 and the door is lined with an inner skin 9 such as a synthetic resin material. The vertical dimensions of the plate material of the inner panel 4 and the reinforcement 4a, which form the closed cross-section portion 7 on the inner panel side, when the plate material is developed are substantially equal to each other, and as shown in FIG. When external force is applied from
The closed cross section 7 is crushed and extends vertically. As a result, the external force applied from the side is absorbed by attempting to flatten the plate material forming the closed cross section 7 up and down.

On the other hand, in the reinforcement 3a on the outer panel side, the distance between the outer panel 3 and the outer panel 3 is different between the central portion and the front and rear portions thereof, and the central portion C has a concave inner surface. As a result, while ensuring rigidity of the outer panel 3 with respect to an input from the outside, the outwardly deformable region on the inner panel 4 side with respect to the input from the inside of the vehicle is provided with the reinforcement 3a on the outer panel side.
Since it can be secured in the recess provided in the central portion C, the external force absorption efficiency can be maximized within a limited size.

In the above embodiment, the closed cross section 7 is provided on the inner panel side, but needless to say, the omission of this does not affect the essence of the present invention.

[0012]

As described above, according to the present invention, it is possible to efficiently disperse the input energy from the outside of the vehicle compartment with a high rigidity of the closed cross section, and also to improve the deformation stroke of the inner panel when the energy is input from the inside of the vehicle compartment. Since it can be ensured, the energy absorption efficiency can be improved without increasing the thickness dimension of the door.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a main part of a door according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a schematic diagram showing a mode of deformation due to an external force.

[Explanation of symbols]

 1 Door 2 Side Glass 3 Outer Panel 4 Inner Panel 3a ・ 4a Reinforcement 6.7 Closed Section 8 Cushion Pad 9 Inner Skin

Claims (1)

[Claims] 1. A door structure for an automobile, wherein a closed cross section is formed by an outer door panel and a reinforcement so as to disperse an input from a side, the reinforcement forming the closed cross section. A door structure for an automobile, characterized in that a recess is formed at a predetermined portion in the front-rear direction of the ment, which is recessed toward the vehicle interior side.