JP3491857B2 - Side collision prevention structure for vehicles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side collision prevention structure for a vehicle, and more particularly to a side collision prevention structure mainly for a rear door portion.

[0002]

2. Description of the Related Art In a vehicle, a rising surface portion is provided at a connecting portion between a rear end portion of a front floor and a front end portion of a rear floor, and the rising surface portion sets the rear floor at a position higher than the front floor so that the rear floor is located above the rear floor. A rear seat is usually attached, and a closed cross section in the vehicle width direction is formed by a cross member or the like on the back surface of the rising surface portion to secure the strength and rigidity of the rising surface portion.

In the general rear floor structure described above, at the time of a side collision, the front end of the other vehicle that collides deforms the rear door inward, and the rear door and the front end of the other vehicle run up to the upper part of the rear floor together. Therefore, there is a problem that the impact load at the time of a side collision cannot be well received and the collision energy cannot be effectively absorbed.

Therefore, as shown in FIG. 3, a guard pipe a is mounted on the upper portion of the rear floor c by a mounting member b in the vehicle width direction, and when the rear door is deformed inward by a side collision, one end of the guard pipe a is deformed. Although a rear door that has been deformed in the above has been developed so far, if the side end portion of the guard pipe a projects toward the rear door side from the side end surface of the rear seat, clothes or the like may be caught when a passenger gets in or out of the vehicle. Therefore, the side end of the guard pipe a does not protrude from the side end surface of the rear seat. Therefore, the side end of the guard pipe a cannot be contacted unless the rear door is considerably deformed inward. , There is a problem. In order to solve the problem, a collision energy absorbing member is attached to the rear door so as to project from the inner surface of the rear door to the inside of the vehicle and the front end of the rear door closely faces the side end of the guard pipe. A structure in which the load is transmitted to and dispersed in the collision energy absorbing member of the rear floor or the rear door on the opposite side by hitting one end face of the pipe and absorbing the load, has been developed in the past. It is disclosed in Japanese Patent No. 128817.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the system disclosed in Japanese Patent No. 8817, the diameter of the guard pipe is limited in terms of the installation space, and the guard pipe can receive the load of the side collision only at the side end face portion of the limited area. It is difficult to effectively absorb and absorb the collision energy because the impact load input to one end of the guard pipe through the collision energy absorbing member cannot be efficiently transmitted and dispersed to the body structural member. Have challenges.

The present invention is intended to solve the above conventional problems.

[0007]

DISCLOSURE OF THE INVENTION The present invention is directed to , for example , a rim provided inside a lower portion of a rear door and inside the door.
The left and right load bearing members having a substantially box-shaped cross section having side surfaces facing the oscillation are respectively fixed across the side sill and the side frame, which are structural members of the vehicle body, and the left and right load bearing members are fixed to the guard pipe. and characterized in that the coupled in, thereby the impact load inputted from one of the door during a side collision, firmly in its side of the side sill and the side frame via the load receiving member on that side
It is received by the load receiving member on the other side through the guard pipe, and is also received by the side sill and the side frame on the other side, which minimizes the entrance of the door into the vehicle. And the impact load is widely transmitted and distributed to the left and right body structural members,
The collision energy is effectively absorbed.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
2 and FIG. 2.

1 and 2, 1 is a rear floor 9.
A guard pipe is provided in the lower portion of the rear seat (not shown) near the front edge of the seat cushion in the vehicle width direction. The guard pipe 1 is fixed to the rear floor 9 by a mounting member. 2 is a load receiving member, and the load receiving member 2
Is fixed across the side sill 6 and the side frame 7 so as to face the inside of the lower portion of the rear door 5, and the side end portion of the guard pipe 1 is fixed to the load receiving member 2 by welding or the like. It

In the illustrated example, the load receiving member 2 is composed of two parts, a first member 3 and a second member 4.

The first member 3 includes a side surface portion 3a facing the inside of the lower portion of the rear door 5, an upper surface portion 3b formed by bending the upper end of the side surface portion 3a toward the inside of the vehicle, and a front end of the side surface portion 3a. It has a front part 3c that is formed by bending inward of the vehicle,
The lower edge portion of the front surface portion 3c is formed of a plate material having a large thickness in a structure having a mounting flange 3d joined to the upper surface of the side sill 6 and fixed by a bolt. The side surface portion 3a of the first member 3 has a large front-rear dimension so as to face the inside of the lower portion of the rear door 5 from the front end position of the seat cushion of the rear seat to the vicinity of the rear end of the lower portion of the rear door. A reinforcement 5a having a box-shaped cross section is provided inside the door at the lower part of the rear door 5 which faces 3a.
Is fixed in the front-back direction.

The second member 4 has an upper surface portion 4a joined to the lower surface of the upper surface portion 3b of the first member 3 and a front surface portion 4b formed by bending the front and rear end portions of the upper surface portion 4a downward. And the rear surface portion 4c
And a front-side portion 4b and a rear-side portion 4c, each of which has a front and rear mounting flanges 4d and 4e formed at the lower ends of the front-side portion 4b and the front-side portion 4c. Flange portions 4f and 4g, which are joined and fixed to the front surface portion 4a of the first member 3, are bent and formed at respective side edges of the front surface portion 4b and the rear surface portion 4c.

Then, the upper surface portion 4a of the second member 4 and the flange portions 4f and 4g are respectively joined to the upper surface portion 3b and the side surface portion 3a of the first member 3 and fixed by spot welding or the like. The first member 3 and the second member 4 are integrally coupled in a state in which the front surface 4b of the second member 4 is arranged substantially parallel to the rear of the front surface 3c of the first member 3 at a predetermined interval. The load receiving portion 2 is configured as a result.

The side end portion of the guard pipe 1 projects laterally from the seat cushion side end surface of the rear seat,
The laterally protruding portion of the guard pipe 1 is the load receiving member 2 described above.
The first member 3 is inserted between the front surface portion 3c of the first member 3 and the front surface portion 4b of the second member 4, and the side end surface of the guard pipe 1 is in contact with the side surface portion 3a of the first member 3. Front part 3 of 3
It is fixed to c and the upper surface portion 3b by welding.

The left and right load receiving members 2 in which the left and right side projecting portions of the guard pipe 1 are fitted and fixed in this manner include the mounting flange 3d of the first member 3 and the joint flange 4e on the rear side of the second member 4. The side portions are fixed to the inner upper surface of the side sill 6 with bolts, and the front joint flange 4d of the second member 4 and the inner portion of the rear joint flange 4e are bolted onto the side portions of the rear floor 9. Fix it. A side frame 7 having a substantially hat-shaped cross section is fixed to the lower surface of the side portion of the rear floor 9 to form a box-shaped cross section in the longitudinal direction of the vehicle body. The separators 8 and 8 are fixed, and the front and rear joint flanges 4d and 4e are fixed to the front and rear separators 8 and 8 with bolts via the rear floor 9, respectively. The joining flanges 4d and 4e are joined to the side frame 7 via the separators 8 and 8.

In this way, the left and right load bearing members 2 are firmly fixed to the left and right side sills 6 and the left and right side frames 7, and the left and right load bearing members 2 are joined by the guard pipe 1 in the vehicle width direction. Due to the structure, the impact load input from one rear door 5 at the time of a side collision of the vehicle is
The side sill 6 on that side through the load receiving member 2 on that side
And the side frame 7, the guard pipe 1 transmits the load to the load receiving member 2 on the other side, and inputs the load to the side sill 6 and the side frame 7 on the other side. It is firmly received by the frames 7 and 7, and the entry into the inside of the rear door 5 is minimized.

More specifically, if the lower portion of one rear door 5 tries to enter inside due to a side collision,
The reinforcement 5a portion hits the side surface portion 3a of the load receiving member 2 on that side in a wide range, and the load is received by the side sill 6 and the side frame 7 on the side on which the load receiving member 2 is attached. The load is input to the load receiving member 2 on the other side via the guard pipe 1, and the load is also received by the side sill 6 and the side frame 7 on the other side, so that the rear door 5 is prevented from entering the inside. The impact load is suppressed, and the impact load is widely transmitted and dispersed to the vehicle body constituent members, whereby the collision energy is effectively absorbed.

The side end portion of the guard pipe 1 projects laterally from the seat cushion of the rear seat, and the projecting portion is covered by the upper surface portion 3b and the front surface portion 3c of the first member 3. Therefore, it does not hinder the passengers getting in and out of the rear seats.

In the above description, the load receiving member 2 needs to be made of a plate material having a large plate thickness, and in consideration of formability, the first member 3 and the second member 4 are formed as shown in the figure. Although it is advisable to adopt a policy of combining two parts, the load receiving member 2 is composed of at least a side surface portion facing the inside of the lower portion of the rear door 5, an upper surface portion, a front surface portion, and a rear surface portion. If it has a substantially box-shaped cross-sectional structure and can be fixed to the side sill at the front and rear two points and to the side frame at the front and rear two points, it may be an integral body or a structure in which three or more parts are combined. It doesn't matter.

Further, the side collision countermeasure structure composed of the left and right load receiving members and the guard pipes connecting them can be applied not only to the illustrated rear door portion but also to the front door portion.

[0021]

As described above, according to the present invention, the inside of the lower portion of the door has a substantially box-shaped cross-sectional structure having side faces closely facing each other over a wide range in the front-rear direction, and straddles the side sill and the side frame. The left and right load receiving members that are fixed to each other and the guard pipe that connects the left and right load receiving members together constitute the vehicle side collision prevention structure, so that the lower portion of one door at the time of a side collision The impact load input to the load receiving member on that side is securely received by the side sills and the side frames on both the left and right sides, and it is possible to minimize the entrance of the door into the vehicle interior, and the impact load is applied to the vehicle body structure. Since it is widely transmitted and distributed to the members, the collision energy is effectively absorbed, and the structure is simple and it does not take up much space and is inexpensive. Coupled with the one in which can lead to practical effect much.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is a perspective view of a load receiving member on one side to which one side portion of a guard pipe is fixed.

2A is a view taken along the line AA of FIG. 1, FIG. 2B is a sectional view taken along line BB of FIG. 1, and FIG. 2C is a plan view of FIG.

FIG. 3 shows an example of a conventional side collision countermeasure structure,
(A) is a one side perspective view, (B) is a BB arrow view of (A).

[Explanation of symbols]

1 guard pipe 2 load receiving member 3 First member 3a side part 3b upper surface 3c front part 3d mounting flange 4 Second member 4a upper surface part 4b front part 4c rear part 4d joint flange 4e Joint flange 4f flange 4g flange 5 rear door 5a Reinforcement 6 side sills 7 side frame 8 separators 9 Rear floor

Claims (3)

(57) [Claims] 1. Inside a lower portion of a vehicle door , said door
Left right load-receiving member having a side portion which pairs toward the reinforcements provided inside the consists of a guard pipe connecting the left and right of the load receiving member, the left and right of the load receiving member, respectively A side collision prevention structure for a vehicle, which is fixed across a side sill and a side frame. 2. The side collision preventing structure for a vehicle according to claim 1, wherein the load receiving member fixing position of the side frame is provided with a separator for partitioning the inside of the cross section of the side frame. Vehicle side collision countermeasure structure. 3. The load receiving member according to claim 1 or 2, wherein a side surface portion that closely faces and opposes a wide range in the front-rear direction inside a lower portion of the door, and an upper surface portion that is formed by bending from an upper end of the side surface portion. A first member including a front surface portion formed by bending from a front end of the side surface portion, a front surface portion and a rear surface portion formed by bending downward from an upper surface portion and front and rear end portions of the upper surface portion, the front surface portion and the rear portion, respectively. A second member having a substantially hat-shaped cross section having front and rear mounting flanges that are respectively bent from the lower end of the surface portion, and the upper surface portion of the second member is bonded and fixed to the upper surface portion of the first member. A load receiving member having a substantially box-shaped cross-sectional structure is formed by abutting and fixing each side edge portion of the front surface portion and the rear surface portion of the two members to the inside of the side surface portion of the first member. The side end of the guard pipe was fixed along the rear side A side collision prevention structure for vehicles characterized by a structure.