JP4026490B2 - Car side door structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a side door structure of an automobile, and more particularly to a slide-type side door structure in which a rear door is slidably provided in a front-rear direction of a vehicle body side portion.
[0002]
[Prior art]
Conventionally, as a side door structure of an automobile, a door composed of an inner panel and an outer panel is rotatably provided via a hinge on a pillar provided in the vertical direction of the vehicle body. In order to improve the door strength against the load input from the vehicle, a structure in which an impact bar is mounted as a reinforcing member in the front-rear direction of the vehicle body inside the door is common.
[0003]
For example, Patent Document 1 discloses a structure in which an impact bar is disposed inside a door with a front end portion and a rear end portion in the vehicle body front-rear direction via brackets.
[0004]
[Patent Document 1]
JP 11-310036 A (FIG. 1)
[0005]
[Problems to be solved by the invention]
By the way, in the case of such a side door structure of Patent Document 1, since the impact bar inside the door is arranged via a bracket, the impact bar and the pillar are not positioned on a straight line when viewed from the front-rear direction of the vehicle body. (In other words, the vehicle width direction position is shifted). In this case, when the load is input from the front of the vehicle body, it may be difficult to transmit the load to the rear of the vehicle body. However, the sill portion provided in the front-rear direction below the vehicle body facing the door is Since the front end portion is joined to the pillar (front pillar), the sill portion can compensate for the load transmitting action from the front to the rear of the vehicle body.
[0006]
However, when the rear door disposed behind the vehicle body in the side door of the automobile is a slide door that is slidably supported along rails provided in the longitudinal direction of the vehicle body, it faces the lower side of the rear door and extends in the longitudinal direction below the vehicle body. Since the cross section of the sill part is reduced due to the restriction of the sliding mechanism of the rear door, the load transmission action from the front to the rear of the vehicle is accompanied by the displacement of the positional relationship between the pillar and the impact bar in the vehicle width direction as described above. However, it is insufficient to compensate for the difficulty in energy absorption, and there is a risk that the energy absorption efficiency corresponding to this load will be reduced.
[0007]
In particular, when the floor as the vehicle compartment floor is lowered in order to expand the vehicle compartment space in the vehicle body in which the rear door is a sliding door, downsizing of the cross section of the sill portion becomes remarkable, and the load from the front to the rear of the vehicle body becomes remarkable. The transmission action becomes even more difficult, and the energy absorption efficiency corresponding to this load may be further reduced.
[0008]
Therefore, the present invention has been made in view of such a conventional problem, and even when the floor of the vehicle body is lowered, the load input from the front of the vehicle is efficiently transmitted to the rear of the vehicle, and according to this load. It is an object of the present invention to provide a side door structure for an automobile that can significantly improve the energy absorption efficiency.
[0009]
[Means for Solving the Problems]
In the present invention, in a side door structure of an automobile that has an inner panel and an outer panel and is slidably supported by rails provided in the front-rear direction of the vehicle body, a lower end portion between the inner panel and the outer panel In addition to providing a load transmission member with a closed cross-sectional shape in the longitudinal direction of the vehicle body, the lower portion of the pillar provided in the vertical direction of the side portion of the vehicle body and facing the lower end portion is enlarged in the vehicle width direction according to the shape of the lower end portion I tried to do it.
[0010]
【The invention's effect】
According to the present invention, a load transmitting member having a closed cross-sectional shape in the longitudinal direction of the vehicle body is provided at the lower end portion between the inner panel and the outer panel of the side door of the automobile that is slidably supported by rails provided in the longitudinal direction of the vehicle body. And a pillar lower portion provided in the vertical direction of the side portion of the vehicle body and facing the lower end portion is enlarged in the vehicle width direction in accordance with the shape of the lower end portion. Wraps in a wide area in the vehicle width direction when viewed from the front of the vehicle body, and is joined to the front end portion of the pillar, and a sill portion and a pillar arranged in the vehicle body front-rear direction below both sides of the vehicle compartment floor Since it wraps in a wide area in the vehicle width direction when viewed from the front, it is possible to provide an area where the sill part, the pillar and the impact transmission part wrap. Therefore, even when the floor of the vehicle body is lowered, the load input from the front of the vehicle can be efficiently transmitted from the sill to the load transmission member via the pillar to the rear of the vehicle. Accordingly, it is possible to provide a side door structure of an automobile that can significantly improve the energy absorption efficiency.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0012]
1 to 4 show a first embodiment of a side door structure of an automobile according to the present invention, FIG. 1 is a cross-sectional view showing a side door structure of an automobile in the first embodiment, and FIG. 1 is an enlarged perspective view showing a side portion of the vehicle body of FIG. 1, FIG. 3 is a schematic configuration diagram showing the relationship between the side portion of the vehicle body and the door in FIG. 1, and FIG. It is a perspective view which sees and shows a part (rear door).
[0013]
1 to 4, reference numeral 1 denotes a front door that is rotatably supported by a vehicle body via a hinge (not shown), and 2 slides on a rail (not shown) provided in the longitudinal direction of the vehicle body via a slide mechanism (not shown). A rear door (hereinafter referred to as a slide door) that is freely supported, 3 is a center pillar as a pillar provided in the vertical direction of the vehicle body between the front door 1 and the slide door 2, and 4 is attached to the front door 1. A front sill portion 5, which is disposed in the front-rear direction below the side portion of the vehicle body in front of the center pillar 3, faces the slide door 2, and is below the side portion of the vehicle body behind the center pillar 3. A rear sill portion 6 is disposed in the front-rear direction, and a floor panel is a vehicle body floor portion. Incidentally, in the case of this embodiment, since the floor panel 6 is lowered, the rear sill portion 5 has a smaller cross section as viewed from the front of the vehicle body.
[0014]
Note that arrows X, Y, and Z in FIG. 2 indicate the vehicle body upward direction, vehicle body rearward direction, and vehicle body outward direction, respectively, and in FIG. 4, arrows X, Y, and Z respectively indicate the vehicle body upward direction, vehicle body forward direction, and vehicle interior side. Pointing in the direction.
[0015]
Specifically, the front door 1 and the slide door 2 are formed by connecting inner panels 11 and 21 and outer panels 12 and 22 on the outer periphery. In this embodiment, the inner panel 21 and the outer panel 22 of the slide door 2 A reinforcement 23, which is a load transmission member having a closed cross section, is provided by connecting the front wall 23a to the inner panel 21 below.
[0016]
Further, a side wall 23a is provided at the front end portion of the vehicle body of the reinforcement 23, and a cylindrical pin 24 having one end coupled to a substantially central portion of the side wall 23a and a slide door at the other end. 2 is provided so as to protrude slightly from the front end portion of the vehicle body 2, and a side wall outside the figure is also provided at the rear end portion of the vehicle body that is in contact with the rear end portion of the slide door 2. Similarly, in the substantially central portion, a not-illustrated pin such as a column to which one end is coupled is suspended so that the other end slightly protrudes from the rear end of the slide door 2.
[0017]
Thus, when a load is input from the front of the vehicle body, the reinforcement 23 transmits the load from the pin 24 to the rear of the reinforcement 23 via the side wall 23a.
[0018]
The center pillar 3 includes a center pillar inner panel 31 provided on the side of the vehicle body on the side of the vehicle body and a center pillar outer panel 32 provided on the outside of the side of the vehicle body, and between the front door 1 and the slide door 2. It is arranged. The lower end portion of the sliding door 2 facing the portion where the reinforcement 23 is provided is overlapped with the reinforcement 23 of the sliding door 2 in a wide area in the vehicle width direction when viewed from the front of the vehicle body. Has been expanded.
[0019]
As described above, in this side door structure, the reinforcement 23 is provided in the longitudinal direction of the vehicle body between the inner panel 21 and the outer panel 22 of the slide door 2 and is opposed to the portion where the reinforcement 23 is provided. By expanding the lower end portion of the center pillar 3 in the vehicle width direction, the area A where the reinforcement 23 and the center pillar 3 wrap in the vehicle width direction can be increased when viewed from the front of the vehicle body. Since the region B where the front sill portion 4 and the center pillar 3 wrap can be enlarged, the front sill portion 4, the center pillar 3 and the reinforcement 23 wrap (that is, the region A and the region B wrap). ) Region C can be provided.
[0020]
Therefore, the load input from the front of the vehicle body can be efficiently transmitted from the front sill portion 4 to the reinforcement 23 via the center pillar 3 to the rear of the vehicle body, and the energy absorption efficiency corresponding to this load is thus greatly improved. And can be improved.
[0021]
Further, in this side door structure, since the slide mechanism (not shown) of the slide door 2 can be attached to the compartment side of the inner panel 21 at the site where the reinforcement 23 is provided, the attachment strength of the slide mechanism is increased. Thus, the operability of the slide door 2 can be improved, and vibrations when the slide door 2 is opened and closed can be reduced to prevent the generation of abnormal noise.
[0022]
Further, in this side door structure, when a load is input from the side of the vehicle body, the load can be transmitted to the floor panel 6 via the reinforcement 23 in the slide door 2. Deformation to the passenger compartment side can be suppressed.
[0023]
Further, in this side door structure, since the reinforcement 23 is provided in the lower part of the slide door 2, the load input from the front of the vehicle body is transmitted to the rear of the vehicle body even in the vehicle body with the floor panel 6 lowered. Without reducing the efficiency, the rear acyl 5 can be reduced, and the weight of the entire vehicle body can be reduced.
[0024]
5 to 7 show a second embodiment of a side door structure of an automobile according to the present invention, and FIG. 5 in which the same reference numerals are assigned to corresponding parts to FIG. 1 shows the side door of the automobile in the second embodiment. 6 is a cross-sectional view showing the structure, and FIG. 6 in which the same reference numerals are assigned to the corresponding parts to FIG. 2 is an enlarged perspective view showing the side part of the vehicle body in FIG. 5, and the same reference numerals are given to the corresponding parts to FIG. FIG. 7 attached thereto is a perspective view showing the essential part (rear door) of FIG. 5 in a transparent manner.
[0025]
In the following, the description of the same parts as those in the first embodiment will be omitted.
[0026]
Specifically, in the second embodiment, instead of the reinforcement 23 in the first embodiment, a prismatic aluminum extrusion in which a plurality of polygonal (in this case, square) holes 25a are perforated in the longitudinal direction of the vehicle body. A reinforce 25 made of a material is disposed between the inner panel 21 and the outer panel 22 of the slide door 2 in the vehicle body front-rear direction.
[0027]
The reinforcement 25 is provided with a side wall 25b having a step shape along the front end of the slide door 2 on the front side of the vehicle body in contact with the front end of the slide door 2. A side wall (not shown) having a step shape along the rear end of the slide door 2 is also provided on the rear side of the vehicle body in contact with the end.
[0028]
As a result, when a load is input from the front of the vehicle body, the reinforcement 25 transmits the load from the side wall 25b to the rear of the reinforcement 25.
[0029]
As described above, in this side door structure, the reinforcement 25 is provided in the longitudinal direction of the vehicle body between the inner panel 21 and the outer panel 22 of the slide door 2 and is opposed to the portion where the reinforcement 25 is provided. By expanding the lower end portion of the center pillar 3 in the vehicle width direction, the area A ′ where the reinforcement 25 and the center pillar 3 wrap in the vehicle width direction when viewed from the front of the vehicle body can be increased. In addition, since the area B where the front sill portion 4 and the center pillar 3 wrap can be enlarged, the front sill portion 4, the center pillar 3 and the reinforcement 25 wrap (that is, the area A ′ and the area B are separated). A region C ′ can be provided.
[0030]
Therefore, a load input from the front of the vehicle body can be efficiently transmitted from the front sill portion 4 to the reinforcement 25 via the center pillar 3 to the rear of the vehicle, and the reinforcement 25 passes through the rectangular hole 25a. Since it is made of a prismatic aluminum extrusion material that is perforated in the front-rear direction, it is possible to increase the transmission part of the load input from the front of the vehicle body to the rear of the vehicle body. The efficiency can be remarkably improved, and the energy absorption efficiency according to this load can be further improved.
[0031]
Further, in this side door structure, since the slide mechanism (not shown) of the slide door 2 can be attached to the compartment side of the inner panel 21 at the site where the reinforcement 25 is provided, the attachment strength of the slide mechanism is increased. Thus, the operability of the slide door 2 can be improved, and vibrations when the slide door 2 is opened and closed can be reduced to prevent generation of abnormal noise.
[0032]
Further, in this side door structure, when a load is input from the side of the vehicle body, the load can be transmitted to the floor panel 6 via the reinforcement 25 in the slide door 2. Deformation to the passenger compartment side can be suppressed.
[0033]
Further, in this side door structure, since the reinforcement 25 is provided below the inside of the slide door 2, the load input from the front of the vehicle body is transmitted to the rear of the vehicle body even in the vehicle body with the floor panel 6 being lowered. The reacyl 5 can be reduced without reducing the efficiency, and the reinforcement 25 itself is also formed of an extruded aluminum material, so that the weight of the entire vehicle body can be significantly reduced.
[0034]
Although the side door structure of the automobile in the present invention has been described by taking the above-described first and second embodiments as examples, the present invention is not limited to this, and various types are possible without departing from the gist of the present invention. Embodiments can be employed. For example, in the above-described first embodiment, a cylindrical pin 24 having one end coupled to the front and rear side ends of the reinforcement 23 and the other end thereof is connected to the front and rear of the slide door 2. Although the case where the side wall 23a is provided so as to protrude slightly from the end portion has been described, the shape and arrangement position of the pin 24 are not limited to this, and various other shapes and positions are also possible. Etc. can be widely applied.
[0035]
Further, in the second embodiment described above, a prismatic rain having a plurality of square holes 25a formed in the vehicle front-rear direction below the inner panel 21 and outer panel 22 of the slide door 2 in the vehicle front-rear direction. Although the case where the force 25 is provided has been described, it is needless to say that the shape of the hole 25a may be other polygonal or circular shapes.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a first embodiment of a side door structure of an automobile according to the present invention.
2 is an enlarged perspective view showing a side part of the vehicle body in FIG. 1. FIG.
3 is a schematic configuration diagram showing a relationship between a vehicle body side portion and a door in FIG. 1 as viewed from above. FIG.
4 is a perspective view illustrating a main part of FIG.
FIG. 5 is a perspective view showing a second embodiment of the side door structure of an automobile according to the present invention.
6 is an enlarged perspective view showing a side part of the vehicle body in FIG. 5. FIG.
7 is a perspective view illustrating a main part of FIG.
[Explanation of symbols]
1 ... Front door 2 ... Slide door (Rear door)
21 ... Inner panel 22 ... Outer panel 23, 25 ... Reinforce (load transmission member)
23a ... Front wall 25a ... Hole 25b ... Side wall 24 ... Pin 3 Center Pillar
4 Front sill part 5 Rear sill part (sill part)

Claims (2)

In the side door structure of an automobile that has an inner panel and an outer panel and is slidably supported by rails provided in the front-rear direction of the vehicle body,
A load transmitting member having a closed cross-sectional shape in the longitudinal direction of the vehicle body is provided at the lower end portion between the inner panel and the outer panel, and the lower portion of the pillar that is provided in the vertical direction of the side portion of the vehicle body and faces the lower end portion is arranged at the lower end portion. A side door structure for an automobile that expands in the vehicle width direction according to the shape of the vehicle. 2. The side door structure for an automobile according to claim 1, wherein the load transmission member is made of an extruded aluminum material.

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