JPH09263126A - Door structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent energy absorbing performance when one side of a vehicle bumped by providing only one guard bar. SOLUTION: In the structure of a door for a vehicle, in the door 1 of which a guard bar 6 is provided, a reinforce 8 is so provided as to stretch over both a pillar stacking edge section 1g stacking on a center pillar 3b in the cross direction of the vehicle with the doors closed and a sill stacking edge section if stacking on a side sill 2 in the cross direction of the vehicle with the doors closed, and the guard bar 6 is stretched inclined downward passing near the middle section swelling out in the furthest outside of the vehicle in the outer panel of the door 1 and is fixed to the reinforcement 8 at the rear end section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle door structure, and more particularly to a door structure having a guard bar inside the door.

[0002]

2. Description of the Related Art Conventionally, as a vehicle door structure having a guard bar inside, for example, one disclosed in Japanese Patent Application Laid-Open No. 7-164879 is known. In this conventional vehicle door structure, a guard bar extends in the front-rear direction and is bridged in a space formed between an outer panel and an inner panel of the door, and a rear end portion of the guard bar is a lock mechanism. The structure is fixed to a reinforcement provided in the middle of the door so as to overlap in the vehicle width direction. Therefore, in this conventional technique, it is possible to sufficiently oppose the load input to the guard bar backward.

[0003]

However, in the above-described conventional vehicle door structure, although the rear end portion of the guard bar is connected to the reinforcement, the reinforcement is provided only in the middle portion of the door. Since it was a structure provided, the distance from the side sill of the vehicle body that receives the reaction force against the collision energy absorption is far from the side collision,
Sufficient energy absorption performance was not obtained. Therefore, in order to improve the energy absorption performance, conventionally, a plurality of guard bars are provided in the space of the door, but in this case, there is a problem that the weight is increased and the connecting man-hour is increased, resulting in an increase in cost. The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to improve energy absorption performance at the time of a side collision with a structure in which only one guard bar is provided.

[0004]

In order to achieve the above-mentioned object, a vehicle door structure of the present invention has a front pillar and a rear pillar which are erected from a side sill provided at a lower portion of a vehicle body side in a front-rear direction. One end of the door disposed between the pillars is rotatably supported by one of the pillars by a hinge,
The door is configured by joining an outer panel and an inner panel so as to form a space between both panels, and a lock mechanism that engages with a member on the other pillar side is provided at the other end of the door. In addition, a pillar overlap edge is formed that overlaps the other pillar in the vehicle width direction with the door closed, and a sill overlap overlaps the side sill in the vehicle width direction with the door closed at the lower edge of the door. An edge portion is formed, and in a vehicle door structure in which a guard bar is extended in the front-rear direction inside the door, there is a reinforcement across the pillar overlapping edge portion and the sill overlapping edge portion of the door. The guard bar is provided so as to extend forward and backward such that the middle portion thereof passes near a portion of the outer panel of the door that is inflated to the outermost side of the vehicle and the end portion on the side where the lock mechanism is provided is lowered. And it has a structure which is characterized in that the end portion is fixed to the reinforcement. According to a second aspect of the invention, the reinforcement is provided so as to overlap the lock mechanism in the vehicle width direction. In the invention according to claim 3, the lower end portion of the reinforcement is provided with a hook portion that penetrates through the door and protrudes to the outside of the space portion and that is arranged at a position facing the side sill in the vehicle width direction. The hook portion has a structure in which the side facing the side sill has a curved cross-sectional shape. According to a fourth aspect of the invention, the end of the guard bar opposite to the side fixed to the reinforcement is fixed to a position near the hinge of the door. In the structure according to claim 5, the guard bar is formed of a hollow pipe.

[0005]

In the invention according to claim 1, in the case of a side collision,
If the colliding object is a small projected area such as a pole,
For example, when the vehicle collides with the middle part of the door, a load is input to the guard bar after the outer panel is deformed, and the load is transmitted to the reinforcement. To be done. In addition, if the colliding object has a large projected area, after the outer panel is deformed, the load is directly input from the colliding object to the guard bar and the reinforcement, and the pillar overlapping edge and sill overlapping of the door main body as described above. Input to the pillar and side sill from the edge, and a high reaction force is obtained by the pillar and side sill. As described above, since the reaction force of the load of the side collision is reliably obtained by the side sill, high rigidity is obtained. Moreover, the guard bar and the reinforcement, which are the strength members that receive the collision load,
Since the former is diagonally installed, it has a larger total area as compared to a horizontally installed one, and the latter has a larger area as it straddles the pillar and side sill. The impact absorption performance is large when the projected area of the object is large. In the invention according to claim 2, since the reinforcement is overlapped with the lock mechanism in the vehicle width direction, the load input to the reinforcement is transmitted to the pillar through the lock mechanism in addition to the pillar overlapping edge portion of the door. Therefore, high load transmission performance can be obtained, and a high reaction force can be obtained by the pillar. In the invention according to claim 3, when the load input to the reinforcement is transmitted to the side sill, first, the hook portion provided at the lower end of the reinforcement collides with the side sill. And, since this hook portion has a curved cross-sectional shape on the side sill side,
When hitting the side sill, the hook does not cut the side sill and the reaction force cannot be obtained. In the invention according to claim 4, the load inputted to the guard bar is transmitted through the hinge at the end portion on the side opposite to the reinforcement when the load is transmitted from the door to the pillar. Also, in the event of a front or rear side collision where the door hinge is provided, the input load is input from the hinge to the reinforcement through the guard bar, and the lock mechanism or the end of the door overlaps with the pillar. Is transmitted to, and receives a reaction force from the pillars and side sills. In the invention according to claim 5, since the guard bar is formed of a hollow pipe, it is easy to process, and high rigidity can be obtained with a small cross-sectional area.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a vehicle door structure of an embodiment. In FIG. 1, reference numeral 1 denotes a door. As shown in FIG. 2, which is a sectional view taken along the line S2-S2 of FIG. 1, the door 1 has a space portion 1c formed between an outer panel 1a and an inner panel 1b. It is constructed by joining.
A side sill 2 that forms the skeleton of the vehicle body extends in the front-rear direction below the door 1. The side sill 2 is also shown in detail in FIG. 3, which is a sectional view taken along line S3-S3 of FIG. As described above, there is formed a step portion 2a which is wrapped around the lower edge portion of the door 1 in the door closing direction (direction of arrow C in the figure) and which a weather strip 1d provided at the lower edge of the door abuts. FIG.
Returning to FIG. 1, front pillars (front pillars) 3a and center pillars (rear pillars) 3b are erected from the side sills 2 in front of and behind the door 1, respectively. The door 1 is
As shown in FIGS. 1 and 5 which is a sectional view taken along the line S5-S5 of FIG. 1, the front pillar 3a is rotatably attached by two hinges 4a and 4b, while the door 1 and the center pillar 3b are provided between the front pillar 3a and the center pillar 3b. , A lock mechanism 5 is provided (see FIG. 6, which is a cross-sectional view taken along line S6-S6 of FIG. 1). As shown in FIG. 6, the lock mechanism 5 includes a striker 5a fixed to the center pillar 3b and a latch (not shown) that is provided at the rear end of the door 1 and that can engage and disengage the striker 5a. It has a lock main body 5b. Further, as shown in FIGS. 5 and 6, the door 1 is configured to overlap the pillars 3a and 3b in the front-rear direction.

Returning to FIG. 1, a guard bar 6 is provided in the space 1c of the door 1. This guard bar 6
Is constituted by a cylindrical hollow pipe (see FIG. 2), and the front and rear ends of the guard bar 6 are respectively the hinges 4a.
Is fixed to the door 1 via a connecting plate 7 provided in the vicinity of the door 1 and a reinforcement 8 provided at the lower rear end of the door 1, and the guard bar 6 has a central portion at the central portion of the general portion of the door 1. In addition, as shown in FIG. 2, it extends rearward and obliquely through a position that bulges outmost to the outside of the vehicle.
That is, as shown in FIG. 4, the guard bar 6 has its front end portion fixed to the connecting plate 7 by welding, and the front end portion of the connecting plate 7 is provided at the edge portion of the inner panel 1b.
Is fixed by welding. On the other hand, the reinforcement 8 is formed in a substantially triangular shape as shown in FIG. 1, and has a sill overlapping edge portion 1f overlapping the side sill 2 in the vehicle width direction at the lower rear edge of the lower edge portion of the door 1 and in the vehicle width direction. It is provided so as to straddle a pillar overlapping edge portion 1g overlapping the center pillar 3b, and is fixed by welding to a step portion 1h of the inner panel 1b (see FIGS. 3 and 6). Then, the rear end portion of the guard bar 6 is fixed to the substantially central portion of the front end of the reinforcement 8 by welding. In addition, as shown in FIGS. 1 and 3, in a part of the lower end portion of the reinforcement 8,
A hook portion 8a that penetrates the inner panel 1b and projects to the outside of the space portion 1c and that faces the step portion 2a of the side sill 2 in the vehicle width direction is provided. The side of the hook 8a facing the step 2a of the side sill 2 at the tip end is formed into a substantially arcuate cross-sectional shape. The upper end of the reinforcement 8 is arranged so as to overlap the lock mechanism 5 in the vehicle width direction as shown in FIG.

Next, the operation of the embodiment during a side collision will be described. For example, when a pole-shaped object having a small projected cross-sectional area, such as a street light, collides with the center of the door 1 in the front-rear direction, for example, in the outermost bulged portion of the outer panel 1a immediately after the outer panel 1a is deformed. ,
An impact is input to the guard bar 6. Then, this shock is applied from the connecting plate 7 to the hinges 4a, 4 at the very beginning of input.
While being received by the front pillar 3a via b,
It is received by the center pillar 3b via the reinforcement 8 and the lock mechanism 5, and then the door 1 is deformed by the impact input, and the hook portion 8a of the reinforcement 8 is received.
When hits the side sill 2, the input to the reinforcement 8 is also received by the side sill 2.
In this state, the input to the guard bar 6 is received within the range sandwiched by the line connecting the upper hinge 4a and the lock mechanism 5 and the line connecting the lower hinge 4b and the position of the hook portion 8a of the train force 8. This means that it will receive an impact over a wider range than the structure with only two guard bars provided on the top and bottom. Further, at this time, the guard bar 6, the connecting plate 7, and the reinforcement 8 are respectively deformed to absorb the collision energy. Meanwhile, door 1
When the side-impacting object is an object having a larger area than the door 1, the object collides with the outer panel 1a from the most bulging portion to the outer side of the vehicle in order, and the guard bar 6, the connecting plate 7 and the rain. Impacts are input to the force 8 almost at the same time, and the impact energy is absorbed by the deformation of these 6, 7, and 8, respectively. Then, the inputs to these 6, 7, and 8 are the same as those described above, with both pillars 3a,
It is received by 3b and the side sill 2. In this way, the connecting plate 7 and the reinforcement 8 are connected to both pillars 3
When an impact is applied to the side sill 3a and the side sill 2, the connecting plate 7 is arranged in the vicinity of the hinge 4a, and the reinforcement 8 overlaps with the lock mechanism 5 in the vehicle width direction. In 3a and 3b, the load is tightly transmitted through the hinge 4a and the lock mechanism 5 and can be received with high rigidity. Further, at this time, the input from the reinforcement 8 to the side sill 2 is received by the hook portion 8a provided at the lower end portion of the reinforcement 8 colliding with the step portion 2a of the side sill 2 at first. Has a circular arc sectional shape, the hook portion 8a does not cut the side sill 2 and the side sill 2 cannot receive the load.

Next, at the time of a frontal collision, the impact input to the front pillar 3a is transmitted to the door 1, but at this time, it is transmitted and dispersed to the center pillar 3b and the side sill 2 via the guard bar 6. , In this case, the connecting plate 7
Is provided in the vicinity of the hinge 4a, the transmission from the front pillar 3a to the guard bar 6 is tightly performed, and the deformation of the door 1 can be suppressed.

In the present embodiment, as described above, the door 1
When a larger object collides with the side surface, the collision energy is absorbed by the deformation of the guard bar 6, the connecting plate 7 and the reinforcement 8, so that the area of the strength member that deforms is larger than that of the conventional structure in the reinforcement 8. It is large because it extends downward until it overlaps with the side sill 2, and the guard bar 6 has a longer overall length and a larger area than that provided horizontally because it is obliquely inclined. The effect that the shock absorption performance is enhanced can be obtained. Further, the reinforcement 8 is extended to a position where the side sill 2 overlaps with the side sill 2 in the vehicle width direction (the sill overlapping portion 1f), and part of the input to the reinforcement 8 is applied to the side sill 2.
Since it is configured to receive the input, it is possible to receive the input in a wide range, and it is possible to obtain an effect that the rigidity can be improved as compared with the related art. As described above, in order to improve the side collision energy absorption performance and the rigidity, only one guard bar 6 is provided, so that the weight, the number of parts, and the number of assembling work steps may be increased as compared with the conventional case. The effect is obtained. In addition, in this embodiment, since a pipe having a hollow circular cross section is used as the guard bar 6, it is lightweight and has high rigidity, and it is easy to process.

Although the embodiment has been described with reference to the drawings, the present invention is not limited to this embodiment. For example, although a cylindrical pipe is used as the guard bar 6 in the embodiment, a pipe having another cross-sectional shape may be used, or a non-hollow channel-shaped one such as an H cross-sectional shape may be used. Further, the shape of the reinforcement 8 is not limited to the triangular shape as long as it extends over the sill overlapping edge portion 1f and the pillar overlapping edge portion 1g of the door 1, and it does not necessarily overlap with the lock mechanism 5 in the vehicle width direction. No need. Further, in the embodiment, the door 1 has a front hinge, but it can be applied to a rear hinge door. In this case, the guard bar will be installed at the front.

[0012]

As described above, in the vehicle door structure of the present invention, the reinforcement is provided across the pillar overlap edge and the sill overlap edge of the door, and the guard bar is provided on this reinforcement. Since the end part of the guard bar is fixed and the guard bar is tilted so that the reinforcement falls, the input to the guard bar or reinforcement is transmitted directly from the reinforcement to the side sill during a side collision. It is possible to obtain an effect that high rigidity is obtained and energy absorption performance is improved. In the invention according to claim 2, since the reinforcement is structured to overlap with the lock mechanism in the vehicle width direction, the load input to the reinforcement is transmitted to the pillar through the lock mechanism in addition to the pillar overlapping edge of the door. Therefore, it is possible to obtain the effect that the rigidity and the energy absorption performance are improved. According to the third aspect of the present invention, since the hook portion that penetrates through the door and faces the side sill in the vehicle width direction is provided in the lower portion of the reinforcement, and the hook portion is formed in a curved cross-sectional shape, the reinforcement is provided at the time of a side collision. The load input to the side sill is transmitted to the side sill via the hook portion, and the effect of improving the transmission performance can be obtained. In the invention according to claim 4, since the end portion of the guard bar is fixed near the hinge, the load is tightly transmitted between the pillar to which the hinge is attached and the door,
The effect that the rigidity and the energy absorption performance can be improved can be obtained. According to the fifth aspect of the invention, since the guard bar is formed by the hollow pipe, it is easy to process, and high rigidity can be obtained with a small cross-sectional area.

[Brief description of drawings]

FIG. 1 is a side view showing a vehicle door structure according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line S2-S2 of FIG.

FIG. 3 is a sectional view taken along line S3-S3 of FIG.

FIG. 4 is a sectional view taken along line S4-S4 of FIG.

5 is a sectional view taken along line S5-S5 of FIG.

FIG. 6 is a sectional view taken along line S6-S6 of FIG.

[Explanation of symbols]

 1 Door 1a Outer panel 1b Inner panel 1c Space part 1d Weather strip 1e Step part 1f Sill overlap edge 1g Pillar overlap edge 1h Step part 2a Side step 2a Step pillar 3a Front pillar (front pillar) 3b Center pillar (rear pillar) 4a hinge 4b hinge 5 lock mechanism 5a striker 5b lock body 6 guard bar 7 connecting plate 8 reinforcement 8a hook part

Claims (5)

[Claims] 1. A front pillar and a rear pillar are erected from a side sill provided at a lower portion of a side portion of a vehicle body so as to be spaced apart from each other in the front-rear direction, and one end of a door disposed between the pillars is one pillar. The door is rotatably supported by a hinge, and the door is configured by joining an outer panel and an inner panel so as to form a space between the panels, and the other end of the door is provided with the other pillar side. And a lock mechanism that engages with the member is provided, and a pillar overlapping edge portion that overlaps the other pillar in the vehicle width direction in the door closed state is formed, and a lower edge portion of the door is in the door closed state. In a vehicle door structure in which a sill overlapping edge portion that overlaps with the side sill in the vehicle width direction is formed, and a guard bar extends in the front-rear direction inside the door, the pillar overlapping edge portion and the sill overlapping edge portion of the door are provided. Across the division Therefore, the guard bar passes forward and backward so that the end on the side where the lock mechanism is provided passes through the vicinity of the portion of the outer panel of the door that swells to the outermost side of the vehicle so that the end is low. A vehicle door structure, wherein the vehicle door structure is inclined and extends, and an end portion thereof is fixed to the reinforcement. 2. The vehicle door structure according to claim 1, wherein the reinforcement is provided so as to overlap with the lock mechanism in the vehicle width direction. 3. The lower end portion of the reinforcement is provided with a hook portion which penetrates the door and is projected to the outside of the space portion and which is arranged at a position facing the side sill in the vehicle width direction. The vehicle door structure according to claim 1 or 2, wherein the hook portion is formed to have a curved cross-sectional shape on the side facing the side sill. 4. The vehicle according to claim 1, wherein an end portion of the guard bar opposite to the one fixed to the reinforcement is fixed to a position near a hinge of the door. Door structure. 5. The vehicle door structure according to claim 1, wherein the guard bar is formed of a hollow pipe.