JPH0834238A - Automobile - Google Patents

Abstract

PURPOSE:To provide an automobile which can disperse external force applied on a door effectively to absorb energy efficiently when external force is applied to the door and reduce its weight and cost. CONSTITUTION:An impact beam 18 whose cross-sectional shape is constant over the whole longitudinal direction is arranged between a door outer panel 3 and a door inner panel 4 of a door 1 attached to a car body 1, and each end 27, 27 thereof is opposed to mounting sections 26, 26 of the door inner panel 4 straigh and fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a vehicle body and a door rotatably supported by the vehicle body. The door is a door outer panel outside the vehicle, and a door inner door inside the vehicle fixed to the outer panel. The present invention relates to an automobile including a door body having a panel, and a door reinforcing means arranged inside the door body.

[0002]

2. Description of the Related Art In a vehicle of the above type, a door reinforcing means is provided inside the door body, so that when an external force acts on the door from the outside, the external force is dispersed over the entire door. Moreover, the external force can be transmitted to the vehicle body to absorb the energy, which can prevent the door and the vehicle body from undergoing large permanent deformation.

The conventional door reinforcing means has a high-rigidity impact beam made of, for example, a pipe, and a mounting member called an extension welded to each end portion in the longitudinal direction thereof, and each mounting member is a door of a door body. It is integrally fixed to the inner panel by welding. When an external force is applied to the door, the external force is received by the impact beam, then dispersed throughout the door and finally transmitted to the vehicle body. As described above, the conventional door reinforcing means can also minimize the amount of permanent deformation of the door and the vehicle body.

However, since the above-mentioned mounting member is composed of a flat plate-shaped piece, its bending rigidity tends to be lower than that of the impact beam, and even if the impact beam receives an external force applied to the door. , The mounting member may be permanently deformed or broken. When such a situation occurs, it becomes difficult to effectively disperse and transmit the external force to the entire door and the vehicle body. Therefore, in the past, the plate thickness and outer shape of the mounting member were set to be large to enhance its bending rigidity, prevent permanent deformation or breakage of the mounting member, and ensure that external force can be dispersed to the entire door and the vehicle body. Was there. However, if the size of the mounting member is increased in this way, it is inevitable that the weight of the vehicle increases and the cost thereof increases.

[0005]

SUMMARY OF THE INVENTION The present invention has been made based on the above-mentioned novel recognition, and an object thereof is to effectively disperse an external force applied to a door to absorb energy. An object of the present invention is to provide an automobile capable of suppressing the increase in weight and cost.

[0006]

In order to achieve the above object, the present invention is directed to an automobile of the type described at the beginning, in which the door reinforcing means has an impact beam having substantially the same cross sectional shape over the entire length in the longitudinal direction. The impact beam
A structure is proposed in which it is arranged in the space between the door outer panel and the door inner panel of the door body, and is fixed to the door inner panel with each longitudinal end directly facing the mounting portion of the door inner panel. To do.

At this time, it is desirable to set the shape of the vehicle body so that a part of the vehicle body is located at a portion facing each end of the impact beam with the door closed.

Furthermore, with the door closed, at the vehicle body portion facing each end of the impact beam, with respect to the door,
It is particularly advantageous if a recess is formed to receive the end of the impact beam when an external force acts from the outside to permanently deform the door.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings, and the above-mentioned conventional structure and its drawbacks will be more specifically described with reference to the drawings.

FIG. 1 is an external perspective view showing an example of an automobile, FIG. 2 is an enlarged sectional view taken along line II-II of FIG. 1, and FIG. 3 is II of FIG.
It is a sectional view taken along the line I-III. The cars shown in these figures
It has a vehicle body 1 and a side door 2 which is openably and closably supported by the vehicle body 1. The door 2 is a door outer panel 3 located outside the vehicle when the door 2 is closed as shown in the drawing.
And a door body 5 having a door inner panel 4 fixed to the door outer panel 3 and located inside the vehicle. The door body 5 is provided with a window glass 6 through a window regulator (not shown). 1) is supported so that it can be raised and lowered.

A reference numeral 7 in FIGS. 1 and 2 indicates a vehicle body 1.
2 is a front fender constituting a front side portion of the vehicle, and a reference numeral 8 in FIG. 2 is a front pillar constituting a skeleton of the vehicle body 1. The front pillar 8 includes a pillar outer panel 9 on the outer side of the vehicle, a pillar inner panel 10 on the inner side of the vehicle fixed to the outer panel 9, and a pillar fixed to the both panels 9 and 10 in a state of being sandwiched between the panels 9 and 10. It has a reinforcing panel 11. Reference numeral 12 in FIGS. 1 and 2 is a rear fender that constitutes a rear side portion of the vehicle body 1. The rear fender 12 is fixed to the quarter outer panel 13 on the outer side of the vehicle as shown in FIG. A quarter inner panel 14 inside the car and both panels 13 and 1
4 and a quarter reinforcing panel 15 fixed to these panels 13 and 14.

The front end portion of the door inner panel 4 of the door 2 is pivotally attached to the front pillar 8 via a door hinge 16 so as to be openable and closable, and the door 2 is rotated in a direction indicated by an arrow A in FIG. The door opening 17 can be closed by opening the door opening 17 between the front pillar 8 and the rear fender 12 and closing the door 2 as illustrated.

Here, a door reinforcing means 19 having an impact beam 18 is disposed inside the door body 5. Before explaining the details, an example of a conventional door reinforcing means will be clarified. deep.

FIG. 6 is a horizontal sectional view similar to FIG. 2, showing a conventional automobile body and door. In FIG. 6, parts corresponding to the respective constituent elements shown in FIG. 2 are shown in FIG. The code | symbol which attached a to the code | symbol which was attached is attached | subjected. As shown in FIG. 7, the conventional door reinforcing means 19a includes a door body 5a.
Of the impact beam 18a disposed in the interior of the vehicle, and the mounting member 2 welded to the respective ends 27a, 27a in the longitudinal direction thereof.
0a, 20a, and their respective mounting members 20a, 20a
Is integrally fixed to the mounting portions 26a, 26a of the door inner panel 4a by welding. Impact beam 18
a is made of, for example, a high-strength steel pipe.

When an external force F acts on the door body 5a from the outside, the external force F is applied to the impact beam 18a.
Received by the beam 18a and the mounting member 2
It is transmitted to the entire door 2a via 0a and 20a, and the door 2a is further deformed and transmitted to the vehicle body 1a. In this way, the external force F is distributed and transmitted to the entire door 2a and the vehicle body 1a, and energy is absorbed during this time, so that the amount of permanent deformation of the door 2a and the vehicle body 1a is suppressed.

However, as described above, each mounting member 20a, 20a is composed of a plate-shaped piece, so when an external force is applied to it, each mounting member 20a, 20a,
20a is more likely to be permanently deformed or broken than the impact beam 18a, and the external force F may not be effectively dispersed in the door 2a and the vehicle body 1a to absorb energy. Therefore, conventionally, each mounting member 20a,
The plate thickness and the outer size of 20a are formed large as shown in FIG. 7, the bending rigidity is increased, the permanent deformation and the breakage are prevented from occurring, and the dispersion effect of the external force F is not impaired. However, this inevitably led to the drawback of increasing the weight of the automobile and increasing its cost.

Conventionally, the impact beam 18a is fixed to the door inner panel 4a via the plate-shaped mounting members 20a, 20a. However, due to the structure of the door body, the impact beam 18a is fixed to the door by the mounting members 20a, 20a. This is because it was believed that the inner panel 4a had to be fixed.

In the embodiment shown in FIGS. 1 to 3,
By breaking such conventional wisdom, the impact beam 18 is directly opposed to and fixed to the mounting portion of the inner panel 4 as described below.

That is, the impact beam 18 is made of a high-rigidity material such as high-strength steel formed in a pipe shape as shown in FIG. 4, and its cross-sectional shape is substantially the same along the entire length in the longitudinal direction. Has been formed. The impact beam 18 is arranged in the space between the door outer panel 3 and the door inner panel 4 of the door body 5, and its longitudinal end portions 27, 27 directly face the mounting portions 26, 26 of the door inner panel 4. In this state, the door inner panel 4 is fixed. In the illustrated example, FIGS.
As shown in FIG.
Each of the fixing portions 21 and 21 has an end portion 27, 2 of the impact beam 18.
The impact beam 18 is fixed to the inner panel 4 by fixing 7 by welding and welding each flange portion 22 thereof to the mounting portions 26, 26 of the door inner panel 4. In the example shown in FIG. 2, each mounting portion 26, 26
Are formed on a flat surface, and the end portions 27, 27 of the impact beam 18 and the attachment portions 26, 26 of the door inner panel 4 are formed.
There is a slight gap G between the two ends 2
You may make 7 and 27 contact | abut to the attachment parts 26 and 26. Alternatively, the end portions 27, 27 of the impact beam 18 may be directly welded and fixed to the mounting portions 26, 26 without the interposition of the mounting members 20, 20. Also, the mounting members 20, 20
Is also made of a high-rigidity material such as high-strength steel.

As can be seen from the above description, the end portions 27, 27 of the beam 18 are accommodated between the door outer panel 3 and the door inner panel 4 in the region where the end portions 27, 27 of the impact beam 18 are located. By forming a large gap and arranging the ends 27, 27 therein, it is possible to directly fix the impact beam 18 to the mounting portions 26, 26 of the door inner panel 4. .

According to the above-mentioned structure, with respect to the door 2,
When an external force F acts from the outside and is received by the impact beam 18, the external force is directly transmitted to the door inner panel 4 via the beam 18, and the panel 4
The external force is transmitted to the vehicle body 1 due to the deformation (see FIG. 5). As in the prior art, the mounting member 20 composed of a plate-shaped piece
The external force is directly transmitted to the inner panel 4 from the impact beam 18 having high bending rigidity and high strength without passing through a and 20a. Therefore, the external force F can be effectively transmitted to the entire door 2 and the vehicle body 1, the energy can be efficiently absorbed, and large permanent deformation of the door 2 and the vehicle body 1 can be prevented. Moreover, since it is not necessary to use the mounting members 20a, 20a having a large plate thickness and a large size, it is possible to reduce the weight of the automobile and reduce its cost.

In this example, as shown in FIGS. 2 and 3,
The shape of the vehicle body 1 is set so that a part of the vehicle body 1 is located at a portion of the impact beam 18 facing the respective end portions 27, 27 in the longitudinal direction with the door 2 closed. That is, the part 2 of the front pillar 8 that constitutes the skeleton of the vehicle body 1
3 and a part 24 of the rear fender 12 are located facing the respective ends 27, 27 of the impact beam 18. Therefore, when the external force F is applied to the impact beam 18 and the door 2 is deformed as shown in FIG. 5, the respective end portions 27, 27 of the impact beam 18 are connected to the front pillar 8 and the rear fender via the door inner panel 4. Hit 12 respectively. As a result, before the door body 5 is largely deformed permanently, the external force F can be reliably transmitted to the vehicle body 1 side, the force can be dispersed, and the energy can be effectively absorbed. In this way, the amount of permanent deformation of the door 2 and the vehicle body 1 can be minimized. In the illustrated example, the vehicle body 1
Since the external force is transmitted to the highly rigid front pillar 8 forming the skeleton, the effect of absorbing the external force F can be further enhanced.

Further, as shown in FIGS. 2 and 3, with the door 2 closed, the ends 27 and 2 of the impact beam 18 are closed.
Recesses 25, 25 are formed in the vehicle body portion facing 7 respectively. In this example, the pillar reinforcing panel 11 of the front pillar 8 and the quarter reinforcing panel 15 of the rear fender 12 are formed with recesses 25, 25 recessed inwardly of the vehicle. According to this structure, with respect to the door 2,
When the external force F acts from the outside and the door 2 is permanently deformed as shown in FIG. 5, each end 2 of the impact beam 18 is
7, 27 are received in the respective recesses 25, 25. By forming the recesses 25, 25 in the vehicle body 1 in this way,
The advantages described below are obtained.

The acting direction of the external force F applied to the door 2 is not constant, but changes depending on the situation at that time. Therefore, if the above-mentioned recesses 25, 25 are not provided, when the external force F is generated, the part where the impact beam 18 hits the vehicle body 1 via the door inner panel 4 changes each time, and any portion of the vehicle body is affected by the impact beam 18. It cannot be predicted whether or not it will hit. On the other hand, when the recess 25 is formed in the vehicle body portion facing each end of the impact beam 18, when the door is deformed when the external force F is generated and the acting direction of the external force F is whatever, the impact beam The respective end portions 27, 27 of 18 are guided by the respective concave portions 25, 25 and always fit into the respective concave portions 25, 25. Therefore, each end 27, 27 of the impact beam 18 is
The position of hitting is always constant regardless of the direction of action of the external force F.

If the vehicle body portion on which the impact beam 18 hits is always the same as described above, the structure of the vehicle body 1 is
This is the most efficient way to absorb energy, and its body 1
Can be designed to have the least permanent deformation. If the vehicle body portion with which the end portions 27, 27 of the impact beam 18 hit is not constant, the position where the external force applied to the vehicle body acts changes each time. Therefore, how to design the vehicle body structure can absorb energy most efficiently. Moreover, it is difficult to predict whether or not the deformation amount of the vehicle body due to the external force can be minimized. If the vehicle body portion against which each end of the impact beam 18 strikes is constant, the energy absorption efficiency is maximized and the deformation amount of the vehicle body due to external force is minimized.
The body structure can be designed easily. Further, by forming the recesses 25, 25, there is an advantage that the rigidity of the vehicle body can be increased and the amount of permanent deformation when an external force is applied thereto can be reduced.

In the illustrated example, the recesses 25, 25 are formed in the pillar reinforcing panel 11 and the quarter reinforcing panel 15, but the recesses are formed in the outer panels 9, 13 of the front pillar 8 and the rear fender 12 or the inner pillars 10, 14. Alternatively, the recess may be formed in a plurality of panels.

Although the embodiment in which the structure of the present invention is applied to the side door provided on the side portion of the vehicle body has been described above, the present invention can be applied to a back door provided on the rear portion of the vehicle body.
Further, it is obvious that the present invention can be applied to various types of automobiles other than passenger cars.

[0028]

According to the structure of the first aspect of the invention, the impact beam is not transmitted to the entire door or the vehicle body through the plate-shaped mounting member which has been conventionally used, but each impact beam is used. Since the external force can be directly transmitted from the end portion to the entire door or the vehicle body, the effect of dispersing the external force can be improved and the energy absorption efficiency can be increased. Moreover, the weight of the automobile can be reduced and the cost thereof can be reduced.

According to the structure described in claim 2, since the vehicle body portion is located so as to face each end of the impact beam, the external force can be effectively transmitted from the impact beam to the vehicle body. The effect of dispersing external force and the effect of absorbing energy can be further enhanced.

According to the third aspect of the present invention, when the external force is generated, the position of the vehicle body portion with which each end of the impact beam hits can be made constant, whereby the dispersion effect of the external force and the energy absorption effect can be maximized. So that you can increase
It is possible to design the body structure.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an example of an automobile.

FIG. 2 is an enlarged horizontal cross-sectional view taken along the line II-II of FIG. 1 and is a partially cutaway view.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a perspective view of a door reinforcing means having an impact beam and a mounting member.

5 is a cross-sectional view similar to FIG. 3, showing a state in which an external force is applied to the door and the door is deformed.

FIG. 6 is a sectional view similar to FIG. 2, showing a conventional configuration.

7 is a perspective view of the conventional door reinforcing means shown in FIG.

[Explanation of symbols]

 1 Vehicle Body 2 Door 3 Door Outer Panel 4 Door Inner Panel 5 Door Body 18 Impact Beam 19 Door Reinforcing Means 23 Part 24 Part 25 Concave 26 Mounting Part 27 End Part F External Force

Claims (3)

[Claims] 1. A door body having a vehicle body and a door rotatably supported by the vehicle body, the door having a door outer panel outside the vehicle and a door inner panel inside the vehicle fixed to the outer panel. In the automobile having the door reinforcing means arranged inside the door body, the door reinforcing means has impact beams having substantially the same cross-sectional shape over the entire length in the longitudinal direction, and the impact beam is , The door body is fixed to the door inner panel in a space between the door outer panel and the door inner panel, and each longitudinal end of the door body directly faces the mounting portion of the door inner panel. Characteristic car. 2. The vehicle according to claim 1, wherein the shape of the vehicle body is set so that a part of the vehicle body is located at a portion facing each end of the impact beam with the door closed. 3. When the door is permanently deformed by an external force acting from the outside of the door on a vehicle body portion facing each end of the impact beam with the door closed, The automobile according to claim 2, wherein a concave portion that receives the end portion is formed.