JP5194874B2 - Body side structure - Google Patents

Description

  The present invention relates to a vehicle body side structure suitable for a vehicle in which an impact beam that receives a side collision load of the vehicle is disposed in a door.

  2. Description of the Related Art Conventionally, a vehicle in which an impact beam (or a door beam) that receives a side collision load of the vehicle is disposed in the door along the front-rear direction is generally known. As a vehicle body side structure of this type of vehicle, for example, Japanese Patent Application Laid-Open No. H10-228867 projects to a predetermined position in the height direction of the center pillar, that is, a height position facing the rear end portion of the door beam disposed in the side door. There is described a vehicle body side structure in which a portion is provided so that the stress at the time of a side collision is distributed throughout the center pillar.

On the other hand, as a vehicle body side structure that prevents deformation of the center pillar, Patent Document 2 discloses a reinforcement member on the front portion of the center pillar at the same height position as the waist reinforcement disposed on the front door. The provided vehicle body side structure is described.
JP-A-9-254810 JP-A-8-2438

  By the way, in order to employ the vehicle body side part structure described in Patent Document 1, it is necessary to change the cross-sectional shape of the center pillar to form a convex portion on the outer surface thereof, and to face the outer surface of the center pillar. It is necessary to change the design of the cross-sectional shape of the rear end portion of the side door so as not to interfere with the convex portion.

  In order to avoid such a design change, it is conceivable that the reinforcing member described in Patent Document 2 is provided on the center pillar instead of the convex portion described in Patent Document 1. Therefore, there are the following problems. That is, when a side collision load is input from the rear end portion of the impact beam (or door beam) to the center pillar, the reinforcing member buckles and deforms together with the front portion of the center pillar, and as a result, the side collision load is reduced to the center pillar. There is a possibility that it cannot be dispersed to other skeleton members.

  SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a vehicle body side structure that can suppress the cross-sectional deformation of the pillar when a side collision load of the vehicle is input to the pillar from the rear end portion of the impact beam in the door. To do.

The vehicle body side part structure according to the present invention is a vehicle body side part structure in which an impact beam that receives a side collision load of a vehicle is disposed in a door along the front-rear direction, and is located inside the rear end of the impact beam. A pillar having a hollow cross-section disposed facing the pillar is provided, and a reinforcing member for reinforcing the front part of the pillar to which a side collision load is input from the rear end part of the impact beam is disposed in the pillar. The reinforcing member is disposed so as to form a closed cross section across the entire vehicle width direction between the front wall portion in the pillar and the cross sectional shape of the closed cross section extends from the outside in the vehicle width direction to the inside. It is characterized by being set to a trapezoid whose front and rear width gradually increases .

In the vehicle body side structure according to the present invention, when the impact beam in the door receives a side collision load of the vehicle, the side collision load is input from the rear end portion to the front portion of the pillar. Here, the front portion of the pillar that side collision load is input, since the closed cross-section across the vehicle width direction throughout between the front wall portion in the pillar by the reinforcing member is formed, a side collision load The cross-sectional deformation of the pillar due to is suppressed. As a result, the side collision load input to the front part of the pillar is distributed and transmitted from the pillar to the other skeleton part of the vehicle body, and the deformation of the passenger compartment is suppressed.

Further, in the vehicle body side part structure of the present invention, the cross-sectional shape of the closed cross section formed between the reinforcing member and the pillar wall is set to a trapezoid whose front-rear width gradually increases from the outside in the vehicle width direction to the inside. since it is, cross-sectional deformation of the pillar by a side collision load Ru is more reliably suppressed.

Also, if that is arranged in front of the lower portion of the reinforcing member Gapi error, since so that a side impact load is dispersed and transmitted more reliably from the pillar to the skeleton portion of the vehicle body preferred.

  According to the vehicle body side structure according to the present invention, the cross-sectional deformation of the pillar when the side collision load of the vehicle is input to the pillar from the rear end of the impact beam in the door can be suppressed. It can be distributed and transmitted from the pillar to the other skeleton part of the vehicle body. As a result, it becomes possible to suppress deformation of the passenger compartment.

  Hereinafter, the best embodiment of the vehicle body side part structure according to the present invention will be described with reference to the drawings. Here, in the drawings to be referred to, FIG. 1 is a front view showing a vehicle body front part structure according to an embodiment as seen from the outer surface side of a front door, and FIG. 2 is a transverse sectional view of a lower end portion of the center pillar shown in FIG. It is.

  The vehicle body side structure according to the embodiment is a vehicle body side structure configured to correspond to an impact beam (door beam) 2 disposed inside the front side door 1, for example, as shown in FIG.

  The front side door 1 has a front end hinged and supported by a front pillar 3 constituting a skeleton part of the vehicle body via a pair of upper and lower door hinges (not shown), and a rear end thereof via a door latch (not shown). The center pillar 4 constituting the skeleton of the vehicle body is detachably locked.

  The impact beam 2 is disposed obliquely from the front upper portion to the rear lower portion in the front side door 1, and the front end portion 2 </ b> A faces the outer surface side of the middle portion in the vertical direction of the front pillar 3, and the rear end portion 2A faces the front part of the lower end part 4A of the center pillar 4 and faces the outer surface side thereof.

  The center pillar 4 has a lower end 4A continuous with the rocker 5 constituting the skeleton of the vehicle body, and an upper end 4B continuous with the roof side rail 6 constituting the skeleton of the vehicle body. As shown in FIG. 2, the center pillar 4 is formed in a hollow cross section by a joint structure of a center pillar outer 4C having a substantially groove-shaped cross section and a substantially flat center pillar inner 4D. The shape is set to an isosceles trapezoidal shape having a wide front-rear width in which the front-rear width gradually increases from the outer side toward the inner side in the vehicle width direction.

  Here, in the center pillar 4, a rear end portion 2 </ b> A of the impact beam 2 faces to a predetermined portion where a side collision load is input from the rear end portion 2 </ b> A of the impact beam 2, that is, a lower end portion 5 </ b> A of the center pillar 4. A reinforcing member 7 is provided to reinforce the front part of the.

  The reinforcing member 7 includes a front wall portion in the center pillar 4, that is, an outer wall portion 4E and a front wall portion 4F formed on the center pillar outer 4C, and a front portion of the inner wall portion 4G including the center pillar inner 4D. In the example shown in FIG. 2, an isosceles trapezoidal closed cross section with a narrow front and rear width in which the front and rear width gradually increases from the outer side to the inner side in the vehicle width direction. Form.

  At the outer end of the main body 7A of the reinforcing member 7, a joining piece 7B joined to the inner surface of the outer wall 4E of the center pillar 4 by an appropriate means such as arc welding, laser welding, adhesion or the like is bent forward. Yes.

  Further, a joining piece 7 </ b> C that is joined to the inner surface of the inner wall portion 4 </ b> G of the center pillar 4 by the same appropriate means is formed on the inner end portion of the main body 7 </ b> A of the reinforcing member 7 by bending backward. As shown in FIG. 3, bead portions 7D and 7E extending in the vehicle width direction are formed on the main body 7A of the reinforcing member 7 so as to improve the buckling strength in the vehicle width direction.

  In the vehicle body side part structure of one embodiment configured as described above, when the other vehicle collides with the front side door 1 and the impact beam 2 in the front side door 1 receives the side collision load, the impact beam 2 A side collision load is input from the rear end 2 </ b> A to the front of the lower end 4 </ b> A of the center pillar 5.

  Here, at the front part in the lower end portion 4A of the center pillar 4 to which the side collision load is input, a closed cross section is formed over the entire vehicle width direction by the reinforcing member 7, and the cross sectional shape of the closed cross section is the vehicle shape. Since the isosceles trapezoidal shape having a narrow front-rear width in which the front-rear width gradually increases from the outer side in the width direction to the inner side, the cross-sectional deformation of the lower end portion 4A of the center pillar 4 due to the side collision load is reliably suppressed. As a result, the side collision load input to the lower end portion 4A of the center pillar 4 is distributed and transmitted to the rocker 5 and the roof side rail 6, which are other skeleton parts of the vehicle body, via the center pillar 4. Deformation of the passenger compartment is suppressed.

  Therefore, according to the vehicle body side structure of the embodiment, the center pillar when the side collision load of the vehicle is input from the rear end 2B of the impact beam 2 in the front side door 1 to the lower end 4A of the center pillar 4 is obtained. 4 and the side collision load can be distributed and transmitted from the center pillar 4 to the rocker 5 and the roof side rail 6 which are other skeleton parts of the vehicle body. As a result, it becomes possible to suppress deformation of the passenger compartment.

  The vehicle body side part structure of the present invention is not limited to the above-described embodiment. For example, the reinforcing member 7 shown in FIGS. 2 and 3 can be changed to the reinforcing member 8 shown in FIGS. 4 and 5 or the reinforcing member 9 shown in FIGS. 6 and 7.

  The reinforcing member 8 shown in FIGS. 4 and 5 has the same joining pieces 8B and 8C and bead portions 8D and 8E as the joining pieces 7B and 7C and the bead portions 7D and 7E of the reinforcing member 7 shown in FIGS. Although formed, the main body 8A of the reinforcing member 8 is formed in a state orthogonal to the joining pieces 8B and 8C. For this reason, the shape of the closed cross section formed in the front part in the center pillar 4 by the reinforcing member 8 is a trapezoidal shape of the front half part which divided the isosceles trapezoid shown in FIG.

  On the other hand, the reinforcing member 9 shown in FIGS. 6 and 7 includes a main body 9A, a joining piece 9B, and a bead portion similar to the main body 8A, the joining piece 8B, and the bead portions 8D and 8E of the reinforcing member 8 shown in FIGS. 9D and 9E are formed, but the joining piece 9C corresponding to the joining piece 8C of the reinforcing member 8 is bent forward like the joining piece 9B. For this reason, the shape of the closed cross section formed in the front part in the center pillar 4 by the reinforcement member 9 is a trapezoid similar to the trapezoid shown in FIG.

  The bead portions 7D and 7E of the reinforcing member 7 shown in FIG. 3 are not essential and may be omitted. Similarly, the bead portions 8D and 8E of the reinforcing member 8 shown in FIG. 5 and the bead portions 9D and 9E of the reinforcing member 9 shown in FIG. 7 can be omitted.

It is a front view which shows the vehicle body front part structure which concerns on one Embodiment of this invention seeing from the outer surface side of a front side door. It is a cross-sectional view of the lower end part of the center pillar shown in FIG. FIG. 3 is a perspective view of a reinforcing member shown in FIG. 2. It is a cross-sectional view corresponding to FIG. 2 which shows the 1st modification of the reinforcement member shown in FIG. It is a perspective view of the reinforcement member of the 1st modification shown in FIG. It is a cross-sectional view corresponding to FIG. 2 which shows the 2nd modification of the reinforcement member shown in FIG. It is a perspective view of the reinforcement member of the 1st modification shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Front side door, 2 ... Impact beam, 2A ... Front end part, 2B ... Rear end part, 3 ... Front pillar, 4 ... Center pillar, 4A ... Lower end part, 4B ... Upper end part, 4C ... Center pillar outer, 4D ... Center pillar inner, 4E ... outer wall portion, 4F ... front wall portion, 4G ... inner wall portion, 5 ... rocker, 6 ... roof side rail, 7 ... reinforcing member, 7A ... main body, 7B, 7C ... joint piece, 7D, 7E ... Beads, 8 ... reinforcing members, 8A ... main body, 8B, 8C ... joining pieces, 8D, 8E ... beads, 9 ... reinforcing members, 9A ... main bodies, 9B, 9C ... joining pieces, 9D, 9E ... beads.

Claims (3)

A vehicle body side structure in which an impact beam that receives a side collision load of the vehicle is disposed in the door along the front-rear direction,
Comprising a pillar of hollow cross-section is placed against the inner side of the rear end of the impact beam, the said pillars, the front portion of the pillar side collision load is inputted from the rear end of the impact beam A reinforcing member for reinforcing is arranged,
The reinforcing member is disposed so as to form a closed cross section across the entire vehicle width direction between the front wall portion in the pillar , and
The vehicle body side part structure is characterized in that the cross-sectional shape of the closed cross section is set to a trapezoid in which the front-rear width gradually increases from the outer side in the vehicle width direction toward the inner side. Vehicle body side structure according to claim 1, wherein the reinforcing member is characterized that you have been arranged to the front of the lower portion of the pillar. 3. The reinforcing member according to claim 1, wherein an outer end portion of the reinforcing member is joined to an inner surface of the outer wall portion of the pillar and an inner end portion is joined to an inner surface of the inner wall portion of the pillar . Car body side structure.

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