JP2016088448A - Vehicle body side part structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to fold a center pillar at a pre-set prescribed position even if a lateral collision load is inputted under various collision conditions.SOLUTION: A center pillar 14 is equipped with a center pillar inner 26, a center pillar stiffener 30 having a rear hinge fitting part 28a, and a lower stiffener 32 which is joined to a side face on an indoor side of the rear hinge fitting part 28a. A rear end side of a door beam 24 has a lap part 34 which overlaps with the center pillar 14 in a vehicle width direction at a position lower than the rear hinge fitting part 28a. The lower stiffener 32 has an extension part 36 which extends downwards from the rear hinge fitting part 28a, and a lower end 38 of the extension part 36 is located at a position off-set to an upper side with respect to an upper end part 42 of a rear side terminal part 40 of the lap part 34.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle body side structure of a vehicle such as an automobile.

  For example, Patent Document 1 discloses a vehicle body side part structure in which a rear end portion of a door beam and a hinge base disposed on a center pillar are arranged at a position where they overlap each other when viewed from the side of the vehicle body.

  In Patent Document 1, when a side impact load is input, the rear end portion of the door beam is received by the hinge base, so that the side impact load is distributed and transmitted from the hinge base to a relatively wide range of the center pillar. Thereby, in patent document 1, it is supposed that the local bending deformation | transformation of a center pillar is prevented and the approach to the vehicle interior of a front door can be blocked | prevented.

JP 2000-108662 A

  However, in the vehicle body side structure disclosed in Patent Document 1, the side impact load can be distributed and transmitted over a relatively wide range from the hinge base to the center pillar, but the strength of the center pillar is uniform over the entire region in the vehicle vertical direction. It is impossible to design and manufacture. For this reason, when a side collision load is input, a partial weak part is formed in the center pillar, and stress concentrates on the weak part, and the center pillar breaks.

  In addition, there are various collision conditions such as the shape of the collision object (for example, vehicle, guardrail, utility pole, etc.), the input direction of the side impact load, and the magnitude of the input value of the side impact load. It is difficult to predict what will concentrate. For example, when the stress is concentrated at the center portion of the center pillar in the vertical direction of the vehicle body, the amount of the center pillar entering the vehicle interior is larger than when the stress is concentrated on the upper side or the lower side of the center pillar.

  The present invention has been made in view of the above points, and even when a side collision load is input under various collision conditions, the vehicle body side is capable of folding the center pillar at a predetermined position set in advance. An object is to provide a partial structure.

  In order to achieve the above object, the present invention provides a front pillar extending in the vertical direction of the vehicle body at a front portion of the vehicle body, a front door rotatably attached to the front pillar via a front hinge, and the front pillar. A vehicle body side having a center pillar extending rearwardly of the vehicle body, a rear door rotatably attached to the center pillar via a rear hinge, and a door beam disposed in the front door and extending in the vehicle body longitudinal direction The center pillar includes a center pillarer on the vehicle interior side, a center pillar that is joined to the vehicle exterior side of the center pillarer to form a closed cross section, and a rear hinge attachment portion to which the rear hinge is attached. A stiffener, and a lower stiffener joined to the side surface of the rear hinge mounting portion on the vehicle interior side, The rear end side of the door beam has a lap portion that overlaps the center pillar in the vehicle width direction at a position below the rear hinge mounting portion, and the lower stiffener extends downward from the rear hinge mounting portion. And a lower end of the extending portion is disposed at a position offset upward from an upper end portion of the rear end portion of the wrap portion.

  According to the present invention, the lower end of the extension portion of the lower stiffener is disposed at a position offset upward from the upper end portion of the rear end portion of the lap portion of the door beam. Thus, in the present invention, when the side impact load is input to the front door and the door beam enters the vehicle interior side, the side impact load transmitted from the lap portion of the door beam is less than the lower end of the extension portion of the lower stiffener. It is possible to create a folding mode at the time of a side collision by concentrating on the lower side.

  Therefore, in the present invention, even when a collision load is input under various collision conditions, a stress concentration region (fragile portion) is set in advance in a portion below the lower end of the extension portion, and this stress concentration You can fold the center pillar in the area. As a result, in the present invention, the amount of entry of the center pillar into the vehicle interior can be controlled to reduce the amount of entry.

  In the present invention, the center pillar stiffener includes a side wall facing outward in the vehicle interior, and a front wall and a rear wall extending inward of the vehicle width from a front end and a rear end of the side wall. A U-shaped cross section formed by a wall and the rear wall, and the lower stiffener includes a lower side wall, a lower front wall, and a lower rear wall respectively joined to the side wall, the front wall, and the rear wall; The extension part has a cutout part formed by cutting out the lower side wall and the lower part of the lower front wall.

  According to the present invention, by providing the cutout portion in the extending portion, the rear end portion of the door beam wrap portion and the extending portion (lower side wall) can be separated along the longitudinal direction of the vehicle body. it can. As a result, a stress concentration region can be provided in a portion below the lower end of the lower stiffener and a portion between the lap portion and the lower side wall, and a center pillar folding mode can be more reliably created.

  Furthermore, the present invention is characterized in that a lower end of the center pillar stiffener is positioned below the rear hinge mounting portion and above the notch portion.

  According to the present invention, the lower end of the center pillar stiffener generally formed of a high-strength material is provided below the rear hinge mounting portion and above the notch portion, so that the center pillar stiffener can be used as the rear hinge mounting portion. While reinforcing the rigidity and strength, the stress concentration effect is not hindered by the notch, and the stress can be reliably concentrated in the stress concentration region.

  Furthermore, the present invention is characterized in that a bead portion extending in a vertical direction of the vehicle body is provided in the extending portion of the lower stiffener.

  According to the present invention, by providing the bead portion, the rigidity and strength of the extension portion of the lower stiffener can be increased. Thereby, it is possible to prevent the center pillar from being folded in the region where the extension portion exists, and to create the center pillar folding mode in the stress concentration region.

  Furthermore, in the present invention, the center pillar includes a center pillar outer that covers the center pillar stiffener from the outside of a vehicle compartment, and an end portion of the bead portion along the vehicle body vertical direction is joined to the center pillar outer. A bead junction is provided.

  According to the present invention, the rigidity and strength of the extended portion can be increased by joining the upper and lower end portions of the bead portion to the center pillar outer via the bead joint portion. Thereby, it is possible to prevent the center pillar from being bent in a region where the extension portion exists, and to create a center pillar folding mode in a preset stress concentration region.

  Furthermore, the present invention is configured such that the center pillar outer is divided into upper and lower parts by an upper center pillar outer and a lower center pillar outer, and a lower end of the upper center pillar outer and an upper end of the lower center pillar outer. The outer joint part is located above the lower end of the center pillar stiffener.

  If the outer joint part, which is the parting line of the center pillar outer, and the lower end of the center pillar stiffener are at the same position in the vertical direction of the vehicle body, stress concentrates at this same position, and a center pillar folding mode is created at an unintended part. Will be. Therefore, in the present invention, the outer joint portion is positioned above the lower end of the center pillar stiffener to avoid the occurrence of a folding mode in an unintended region and create a folding mode only in a preset stress concentration region. be able to.

  In the present invention, it is possible to obtain a vehicle body side part structure that can fold a center pillar at a predetermined position set in advance even when a side collision load is input under various collision conditions.

It is a principal part side view of the vehicle body to which the vehicle body side part structure which concerns on embodiment of this invention was applied. FIG. 2 is a partially enlarged side view of FIG. 1. It is an enlarged front view of Roastiffna. (A), (b) is a perspective view of a lower stiffener. FIG. 3 is an enlarged side view showing a state where a center pillar outer is attached to the state of FIG. 2. FIG. 6 is an enlarged side view showing a state in which the lower center pillar outer is removed from the state of FIG. 5. (A) is an end view along the line VIIA-VIIA in FIG. 5, and (b) is an end view along the line VIIB-VIIB in FIG. 5. In this embodiment, it is explanatory drawing which shows the stress concentration area | region formed by the bending mode at the time of a side collision.

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a side view of a main part of a vehicle body to which a vehicle body side part structure according to an embodiment of the present invention is applied, and FIG. 2 is a partially enlarged side view of FIG. In each figure, “front and rear” is the vehicle longitudinal direction, “up and down” is the vertical vertical direction (vehicle vertical direction), “left and right” is the vehicle width direction (vehicle horizontal direction), and “inside and outside” is the vehicle The interior side and the exterior side of the passenger compartment are shown. Moreover, in FIG. 1, the state which removed the center pillar outer from the center pillar is shown.

  As shown in FIG. 1, a vehicle body 10 to which a vehicle body side part structure according to an embodiment of the present invention is applied includes a front pillar (A-pillar) 12 positioned at the front of the vehicle body and extending in the vertical direction of the vehicle body, and a front pillar 12. And a center pillar (B-pillar) 14 extending in the vertical direction of the vehicle body.

  A front door opening 15 and a rear door opening 17 are respectively formed on the left and right sides of the vehicle body 10. In FIG. 1, only the right side is shown. A front door 18 is attached to the front door opening 15 in front of the vehicle body via a pair of front hinges 16 so as to be rotatable by a predetermined angle. The pair of front hinges 16 are attached to the front pillar 12 at a predetermined distance along the vertical direction.

  A rear door 22 is rotatably attached to the rear door opening 17 at the rear of the vehicle body through a pair of rear hinges 20 by a predetermined angle. The pair of rear hinges 20 are attached to the center pillar 14 with a predetermined distance apart along the vertical direction. In FIG. 1, the front door 18 and the rear door 22 are indicated by virtual lines for convenience.

  The front door 18 and the rear door 22 are formed by joining peripheral portions of an outer panel and an inner panel (not shown), respectively. Inside the front door 18 is disposed a door beam 24 that extends along the longitudinal direction of the vehicle body and is inclined so as to fall from the front of the vehicle body toward the rear of the vehicle body. The front end of the door beam 24 is fixed inside the front end portion of the inner panel. The rear end of the door beam 24 is fixed to the lower side inside the rear end portion of the inner panel.

  As shown in FIG. 2, the center pillar 14 is joined to a center pillarer 26 provided on the vehicle interior side, and is joined to the outside of the vehicle interior of the center pillarer 26 to form a closed cross section. A center pillar stiffener 30 having a portion 28a, a lower stiffener 32 joined to a side surface on the vehicle interior side of the rear hinge mounting portion 28a, and a center pillar outer 50 that covers the center pillar stiffener 32 from the outside of the vehicle interior (see FIG. 5 described later) And.

  The rear hinge mounting portion 28a is set so as to have high rigidity and strength by joining the center pillar stiffener 30 disposed on the outer side of the passenger compartment and the lower stiffener 32 disposed on the inner side of the passenger compartment. The lower stiffener 32 is also joined to the center pillar outer 50 via four bead joints 52 as described later (see FIG. 7B described later).

  The rear end side of the door beam 24 has a lap portion 34 that overlaps (wraps) with the center pillar 14 in the vehicle width direction at a position below the rear hinge mounting portion 28a.

  As shown in FIG. 2 and FIG. 7A, the center pilastiffer 30 includes a side wall 30a facing outward in the vehicle interior, a front wall 30b and a rear wall 30c extending inwardly of the vehicle width from the front and rear ends of the side wall 30a. Have The side wall 30a, the front wall 30b, and the rear wall 30c form a U-shaped cross-section 44 (see FIG. 7A described later).

  As shown in FIG. 7A to be described later, the lower stiffener 32 includes a lower side wall 32a and a lower front wall 32b that are respectively joined to the side wall 30a, the front wall 30b, and the rear wall 30c of the center pilastiffener 30. And a lower rear wall 32c. The lower stiffener 32 is formed in a substantially U-shaped cross section except for a portion where a notch 46 to be described later is formed, and the lower front wall 32b and the lower rear wall 32c face each other with the lower side wall 32a interposed therebetween. It is provided to do.

  3 is an enlarged front view of the lower stiffener, and FIGS. 4A and 4B are perspective views of the lower stiffener.

  As shown in FIGS. 2 and 3, the lower stiffener 32 includes an extending portion 36 that extends downward from a rear hinge mounting portion 28 b provided on the upper end side. The extending portion 36 is a lower portion of the lower stiffener 32 that is not covered with the center pilastiffer 30. As shown in FIG. 2, the lower end 38 of the extending portion 36 is disposed at a position offset upward from the upper end portion 42 of the rear end portion 40 of the lap portion 34 of the door beam 24. In other words, the horizontal imaginary line L passing through the upper end portion 42 of the rear terminal portion 40 of the lap portion 34 of the door beam 24 is set at a position where it does not overlap (overlap) with the lower end 38 of the extending portion 36 of the lower stiffener 32. ing.

  The extension part 36 of the lower stiffener 32 has a notch part 46 formed by notching the lower part of the lower side wall 32a and the lower front wall 32b. The notch 46 is formed in a substantially triangular shape when viewed from the front (see FIG. 3). As shown in FIG. 2, the lower end 30 d of the center pillar stiffener 30 is provided below the rear hinge attachment portion 28 b and above the notch portion 46. The upper end of the center pillar stiffener 30 is joined to the roof side rail as shown in FIG.

  The extending portion 36 of the lower stiffener 32 is provided with a pair of bead portions 48 that extend in parallel in a substantially square shape in a substantially vertical direction. Four bead joint portions 52 that are joined to the surface of the center pillar outer 50 on the vehicle interior side are provided at the upper and lower ends of each bead portion 48. Each bead joint portion 52 is configured by a circular bulge portion that is continuous with the bead portion 48 and bulges further toward the vehicle compartment outer side than the bead portion 48.

  5 is an enlarged side view showing a state in which the center pillar outer is attached to the state of FIG. 2, FIG. 6 is an enlarged side view showing a state in which the lower center pillar outer is removed from the state of FIG. FIG. 7A is an end view taken along line VIIA-VIIA in FIG. 5, and FIG. 7B is an end view taken along line VIIB-VIIB in FIG.

  As shown in FIG. 5, the center pillar 14 includes a center pillar outer 50 that covers the center pillar stiffener 30 from the outside of the passenger compartment. The center pillar outer 50 includes an upper center pillar outer 54 located on the upper side and a lower center pillar outer 56 located on the lower side. Three pieces including the center pillar liner 26, the center pillar stiffener 30, and the center pillar outer 50 are integrally joined to constitute the center pillar 14.

  The center pillar outer 50 includes an upper center pillar outer 54 and a lower center pillar outer 56. The center pillar outer 50 has an outer joint portion 58 in which a lower end 54a of an upper center pillar outer 54 and an upper end 56a of a lower center pillar outer 56, which are separately manufactured, are abutted and joined to each other. Are integrally connected with each other. The outer joint 58 forms a parting line extending along a substantially horizontal direction. As shown in FIG. 6, the outer joint 58 is set to be positioned above the lower end 30 d of the center pilastiffer 30.

  Returning to FIG. 2, a substantially rectangular opening 60 for accommodating the seat belt retractor 59 is formed on the lower side of the center pillar 14. In the opening 60, the extending part 36 of the lower stiffener 32 is arranged so as to face. A space is formed between the lower end 38 of the extending portion 36 and the bottom 60 a of the opening 60, and the side end of the lower side wall 32 a of the extending portion 36 and the side 60 b of the opening 60 are formed. A space is formed between them. A patch 62 is disposed along the rear door opening 17 at the rear of the vehicle body close to the opening 60.

  The vehicle body 10 to which the vehicle body side structure according to the present embodiment is applied is basically configured as described above. Next, the function and effect will be described. FIG. 8 is an explanatory diagram showing a stress concentration region formed by the folding mode at the time of a side collision in the present embodiment.

  In the present embodiment, the lower end 38 of the extension portion 36 of the lower stiffener 32 is disposed at a position offset upward from the upper end portion 42 of the rear end portion 40 of the lap portion 34 of the door beam 24. Thereby, in this embodiment, when the side impact load is input to the front door 18 and the door beam 24 enters the vehicle interior side, the side impact load transmitted from the lap portion 34 of the door beam 24 is increased. The folding mode at the time of a side collision can be created by concentrating on the lower side of the lower end 38 of the protruding portion 36.

  Therefore, in the present embodiment, even when a collision load is input under various collision conditions, as shown in FIG. 8, the stress concentration region ( The fragile portions R1 and R2 are provided, and the center pillar 14 can be folded at the stress concentration regions R1 and R2. As a result, in the present embodiment, the folding mode at the time of a side collision can be controlled to reduce the amount of the center pillar 14 entering the vehicle interior side.

  That is, at a portion above the lower end 30d of the center pilastiffener 30, two pieces of the center pilastiffener 30 and the lower stiffener 32 (including the rear hinge attaching portion 28 and the portion above the extending portion 36) are joined. Has been. At a portion below the lower end 30 d of the center pilastiffener 30, the center pilastiffener 30 is composed of a single piece consisting only of the extending portion 36 of the lower stiffener 32. In a portion below the lower end 38 of the extending portion 36 of the lower stiffener 32, a stress concentration region R1 is formed by the space formed by the opening 60, and the number of components is zero. As described above, in the present embodiment, in the vertical direction from the upper end to the lower end 38 of the lower stiffener 32, the constituent elements are configured by 2 sheets → 1 sheet → 0 sheets, so that the rigidity and strength are reduced stepwise. Thus, the stress concentration region R1 (see FIG. 8) is arranged at the end point.

  For example, when a weak part is composed of a part with strong and weak rigidity and a weak part, it will break at the boundary part, but in this embodiment, the rigidity and strength are reduced stepwise as described above. By controlling the time folding mode, the side impact load transmitted from the door beam 24 can be more reliably concentrated in the stress concentration region R1.

  Further, in the present embodiment, by providing a cutout portion 46 in the extension portion 36 of the lower stiffener 32, the rear end portion 40 of the lap portion 34 of the door beam 24 and the extension portion 36 (lower side wall 32a) are provided. Can be separated along the longitudinal direction of the vehicle body. Thereby, in this embodiment, while being able to provide the stress concentration area | region R1 in the part below the lower end 38 of the lower stiffener 32, stress concentration area | region R2 is provided in the part between the lap | wrap part 34 and the lower side wall 32a. The folding mode of the center pillar 14 can be made more reliably.

  Note that the stress concentration regions R1 and R2 shown in FIG. 8 are set at positions corresponding to the feet of the occupant seated on the rear seat (not shown), and the folding mode of the center pillar 14 at the feet and waist including the occupant's knees. It is possible to preferably avoid the occurrence of.

  Furthermore, in the present embodiment, the center pillar stiffener 30 that is generally formed of a high-strength material is provided with a lower end 30d below the rear hinge attachment portion 28b and above the notch portion 46, thereby providing a center pillar. The stiffener 30 reinforces the rigidity and strength of the rear hinge mounting portion 28b, and the stress concentration effect is not inhibited by the notch 46, and the stress can be reliably concentrated in the stress concentration regions R1 and R2.

  Furthermore, in the present embodiment, by providing the bead portion 48, the rigidity and strength of the extending portion 36 of the lower stiffener 32 can be increased. Thereby, it is possible to prevent the center pillar 14 from being bent in the region where the extension portion 36 exists, and to create a folding mode of the center pillar 14 in the stress concentration regions R1 and R2 set in advance.

  Furthermore, in this embodiment, the rigidity and strength of the extension part 36 can be increased by joining the upper and lower ends of the bead part 48 to the center pillar outer 50 via the bead joint part 52. Thereby, it is possible to prevent the center pillar 14 from being bent in the region where the extension portion 36 exists, and to create a folding mode of the center pillar 14 in the stress concentration regions R1 and R2 set in advance.

  If the outer joint 58 that is the parting line of the center pillar outer 54 and the lower end 30d of the center pillar stiffener 30 are at the same position in the vertical direction of the vehicle body, stress concentrates at this same position, and the center pillar 14 is unintentionally located. The fold mode will be created. Therefore, in the present embodiment, the outer joint portion 58 is positioned above the lower end 30d of the center pilastiffer 30, thereby avoiding the occurrence of a bending mode in an unintended portion, and a preset stress concentration region R1, A folding mode can be created only at R2.

DESCRIPTION OF SYMBOLS 10 Car body 12 Front pillar 14 Center pillar 16 Front hinge 18 Front door 20 Rear hinge 22 Rear door 24 Door beam 26 Center pillar liner 28a, 28b Rear hinge attachment part 30 Center pillar stiffener 30a Side wall 30b Front wall 30c Rear wall 30d Lower end 32 Lower stiffener 32a Lower side wall 32a Lower front wall 32c Lower rear wall 34 Lap portion 36 Extending portion 38 Lower end 40 (extended portion) Lower end 40 Rear end surface portion 42 Upper end portion 44 U-shaped cross section 46 Notch portion 48 Bead portion 50 Center pillar outer 52 Bead joint portion 54 Upper center pillar outer 54a Lower end (upper center pillar outer) 56 Lower center pillar outer 56a Upper end (lower center pillar outer) 58 Outer joint R1, R2 Stress concentration region

Claims (6)

A front pillar extending in the vertical direction of the vehicle body at the front of the vehicle body,
A front door rotatably attached to the front pillar via a front hinge;
A center pillar extending in the vertical direction of the vehicle body behind the front pillar;
A rear door rotatably attached to the center pillar via a rear hinge;
A door beam disposed inside the front door and extending in the longitudinal direction of the vehicle body;
A vehicle body side structure having
The center pillar is
A center pillar in the passenger compartment,
A center pillar stiffener having a rear hinge attachment portion to which the rear hinge is attached, and a closed cross-section formed on the outer side of the center pillar liner.
A lower stiffener joined to a side surface of the rear hinge mounting portion on the vehicle interior side,
The rear end side of the door beam has a lap portion that overlaps with the center pillar in the vehicle width direction at a position below the rear hinge mounting portion,
The lower stiffener has an extending portion that extends downward from the rear hinge mounting portion,
The vehicle body side part structure characterized by the lower end of the said extension part being arrange | positioned in the position offset upwards rather than the upper end part in the rear side terminal part of the said lap | wrap part. In the vehicle body side part structure according to claim 1,
The center pillar stiffener includes a side wall facing in the vehicle interior / exterior direction, and a front wall and a rear wall extending inward of a vehicle width from a front end and a rear end of the side wall, and the side wall, the front wall, and the rear wall With a U-shaped cross-section formed,
The lower stiffener includes a lower side wall, a lower front wall, and a lower rear wall that are joined to the side wall, the front wall, and the rear wall, respectively.
The vehicle body side structure according to claim 1, wherein the extending portion includes a cutout portion formed by cutting out a lower side wall and a lower portion of the lower front wall. The vehicle body side part structure according to claim 2,
The vehicle body side structure, wherein a lower end of the center pillar stiffener is located below the rear hinge mounting portion and above the notch portion. The vehicle body side part structure according to any one of claims 1 to 3,
A vehicle body side structure, wherein the extension portion of the lower stiffener is provided with a bead portion extending in a vertical direction of the vehicle body. The vehicle body side structure according to claim 4,
The center pillar comprises a center pillar outer that covers the center pillar stiffener from the outside of the passenger compartment,
A vehicle body side part structure characterized in that a bead joint portion joined to the center pillar outer is provided at an end portion of the bead portion along the vehicle body vertical direction. The vehicle body side part structure according to claim 5,
The center pillar outer is divided into upper and lower parts by an upper center pillar outer and a lower center pillar outer, and an outer joint portion in which a lower end of the upper center pillar outer and an upper end of the lower center pillar outer are joined. Have
The vehicle body side structure, wherein the outer joint portion is located above a lower end of the center pilastiffer.

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