JP2023141444A - Reinforcement structure of vehicle - Google Patents

Abstract

To prevent a collision region of a side, sill receiving a collision load in a case of a side collision, from entering a vehicle body too much.SOLUTION: A reinforcement structure of a vehicle C comprises a side sill 3 which has a substantially channel-sectioned side sill inner 31 having an opening part 31a open toward outside the vehicle in a vehicle width direction, a side sill outer 32 provided to cover the opening part 31a, and a reinforcement member 33 sandwiched between the side sill inner 31 and side sill outer 32 to cover the opening part 31a. The side sill 3 supports a rail housing part 6 which houses a lower rail 5 of a slide door (not illustrated in Fig.) moving along an extension direction of the side sill 3. The reinforcement member 33 has first reinforcement parts 33a, 33b which are connected to both upper and lower end parts of the opening part 31a, and a second reinforcement part 33c which is connected to only one front/rear-directional end part of the rail housing part 6.SELECTED DRAWING: Figure 4

Description

The present invention relates to a reinforcing structure for a vehicle.

2. Description of the Related Art Conventionally, as a reinforcing structure for a vehicle, a vehicle body structure is known in which the rigidity of a side sill is improved to support the load of a lower rail of a sliding door (see, for example, Patent Document 1).

The vehicle body structure described in Patent Document 1 improves the rigidity of the side sill by overlapping and joining the flange portion of a reinforcing member for reinforcing the side sill in the longitudinal direction of the vehicle to the wall of the lower rail storage section that stores the lower rail of the sliding door. Improving.

The Ministry of Land, Infrastructure, Transport and Tourism has amended and promulgated the "Safety Standards for Road Transport Vehicles," which sets vehicle safety standards, including new occupant protection standards for side collisions with utility poles, etc. (hereinafter referred to as "side collisions"). , was implemented. Under the newly established passenger protection standards for side collisions with utility poles, etc., collision tests were conducted with the collision speed increased from 26 km/h to 32 km/h and the collision angle from 90 degrees to 75 degrees. stipulated to be implemented.

In addition, the safety standards for this road transport vehicle require that the input value of the impact applied to the dummy be below a certain value, that the door not come off, and that fuel leakage after a collision be below a certain amount. The law requires the following:

JP2018-114918A

In recent years, society has been demanding safer cars, and further improvements are desired. In conventional vehicle body structures, even if the amount of intrusion of the side sill increases due to increased speed, etc. at the time of a side collision, the deformed side sill is prevented from intruding too far inward in the vehicle width direction beyond the desired range. It is desirable to be able to do so.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a reinforcing structure for a vehicle that can prevent the collision area of a side sill, which receives a collision load during a side collision, from penetrating too much inside the vehicle body.

As a means for solving the above problems, the present invention provides a side sill inner having a substantially U-shaped cross section and having an opening opening toward the outside of the vehicle in the vehicle width direction, and a side sill outer provided so as to cover the opening. and a reinforcing member sandwiched between the side sill inner and the side sill outer and covering the opening, wherein the side sill has a reinforcing member that is sandwiched between the side sill inner and the side sill outer and covers the opening. The reinforcing member supports a rail storage part that stores a lower rail of a sliding door that moves, and the reinforcing member includes a first reinforcing part connected to both ends of the opening in the vertical direction, and a first reinforcing part connected to both ends of the opening in the front and rear directions. a second reinforcing portion connected only to one end of the second reinforcing portion.

INDUSTRIAL APPLICATION This invention can provide the reinforcement structure of the vehicle which can suppress the collision area|region of the side sill which receives a collision load at the time of a side collision from entering into the inside of a vehicle body too much.

FIG. 1 is a side view showing an example of a reinforcing structure for a vehicle according to an embodiment of the present invention. 2 is an enlarged view of part A in FIG. 1. FIG. FIG. 2 is an enlarged perspective view of a main part showing a rail storage section. FIG. 3 is an enlarged perspective view of a main part showing a reinforcing member installed. FIG. 3 is an enlarged side view of the reinforcing member. FIG. 3 is an enlarged sectional view taken along VI-VI in FIG. 2; FIG. 3 is an enlarged side view of a main part showing the state of the reinforcing member when the vehicle has a side collision. FIG. 2 is an enlarged bottom view of essential parts showing the state of the vicinity of the tank when the vehicle has a side collision. FIG. 3 is an explanatory diagram showing the normal state of the side sill before the vehicle causes a side collision, and the amount of intrusion of the side sill when the vehicle causes a side collision.

Hereinafter, an example of a reinforcing structure for a vehicle C according to an embodiment of the present invention will be explained based on FIGS. 1 to 9.
Note that the same components are given the same reference numerals, and redundant explanations will be omitted. The traveling direction of the vehicle C shown in Fig. 1 is described as "front", the backward direction as "rear", the vertically upper side as "up", the vertically lower side as "down", and the vehicle width direction as "left" and "right". do.
First, a vehicle C to which a reinforcing structure for a vehicle C according to an embodiment of the present invention is applied will be described.

≪Vehicle≫
The vehicle includes a door (not shown) movably supported on a side portion 1d of the vehicle body, a door opening 1a in which the door is arranged to be openable and closable, and a center pillar 2 provided approximately at the center of the side portion 1d of the vehicle body. and a side sill 3 forming a lower frame portion of the door opening 1a. That is, the vehicle C only needs to have the center pillar 2 and the side sill 3 on the side portion 1d of the vehicle body, and the type and type thereof are not particularly limited.

≪Vehicle body≫
As shown in FIG. 1, a pair of left and right side sills 3, a pair of left and right front pillars 11, and the like are installed substantially symmetrically in the lower portion of the vehicle body on both left and right sides of the vehicle body 1, for example. Further, the door opening 1a is provided with a sliding door (not shown) that slides along the extending direction of the side sill 3 to open and close the door opening 1a. Since the lower part of the vehicle body 1 is substantially symmetrical, hereinafter, one side of the left and right sides of the vehicle body 1 will be mainly described, and description of the other side of the left and right sides of the vehicle body 1 will be omitted as appropriate.

≪Reinforcement structure of vehicle≫
The reinforcement structure of the vehicle C is a vehicle body structure that prevents the collision area of the side sill 3, which receives the collision load F1 (see FIGS. 8 and 9) in the event of a side collision, from penetrating too far inside the vehicle body. The reinforcement structure of vehicle C does not increase the rigidity of the entire vehicle body in order to reduce the amount of intrusion C1 of the side sill 3 in the event of a side collision (see Fig. 9), but rather crushes the closed section of the side sill 3 to reduce the amount of intrusion C1. The structure is as follows.

As shown in FIG. 4, the reinforcing structure of the vehicle C includes a side sill inner 31, a side sill outer 32 (see FIG. 3), and a reinforcing member disposed between the side sill inner 31 and the side sill outer 32 to reinforce the side sill 3. 33 and a side sill 3 having the following. As a method for reducing the intrusion amount C1 (see FIG. 9), a triangular cut portion 33k formed on the lower side of the rear end of the reinforcing member 33 and a plurality of openings 33h formed in the reinforcing member 33 shown in FIG. and is cutting off. As a result, the reinforcing member 33 becomes brittle, and the side sill 3 is accelerated to open deformation in the event of a side collision, making it more likely to collapse than before. In order to absorb this, the intrusion amount C1 (see FIGS. 8 and 9) of the side collision location inward in the vehicle width direction is reduced.
In the parts of the side sill 3 where the reinforcing member 33 is not installed, since there is no reinforcing member 33, the side sill 3 is more likely to open and deform in the event of a side collision compared to the part where the reinforcing member 33 is installed. It has a structure that absorbs the collision load F1 (see FIGS. 8 and 9) by opening and deforming.

≪Center Pillar≫
As shown in FIG. 1, the center pillar 2 is a frame member that forms a rear frame portion of the door opening 1a on the front seat side and a front frame portion of the door opening 1a on the rear seat side. As shown in FIGS. 3 and 4, the center pillar 2 includes a center pillar outer 22 arranged on the outer side of the vehicle and a center pillar inner 21 arranged on the inner side of the vehicle. The center pillar 2 forms a closed cross section extending in the vertical direction by joining a center pillar outer 22 and a center pillar inner 21 to overlap each other in the vehicle width direction. The center pillar 2 is vertically joined to a connecting portion 1b at the center of the side sill 3, and extends from the connecting portion 1b to a roof side rail (not shown) disposed above.

<Center pillar inner>
As shown in FIG. 4, the center pillar inner 21 is a member that constitutes the inner surface of the center pillar 2. As shown in FIG. A lower end portion of the center pillar inner 21 is joined to the inner side of the side sill inner 31. The center pillar inner 21 is made of a metal plate member having a substantially concave shape when viewed in cross section.

<Center pillar outer>
As shown in FIGS. 2 and 3, the center pillar outer 22 is a member that constitutes the outer surface of the center pillar 2. As shown in FIGS. A lower end portion of the center pillar outer 22 is joined to the outer surface of the side sill outer 32. The center pillar outer 22 is made of a metal plate member having a substantially concave shape when viewed in cross section.

≪Side sill≫
As shown in FIG. 1, the side sill 3 is a frame member extending in the front-rear direction from the lower end of the front pillar 11 to the front end of the rear wheel house 12. As shown in FIG. 4 or FIG. 6, the side sill 3 includes a side sill inner 31 on the inside of the vehicle, a side sill outer 32 on the outside of the vehicle, a reinforcing member 33, a bulkhead 34, a lower rail 5, a rail storage part 6, It consists of:

As shown in FIG. 6, the side sill 3 is formed by joining a side sill inner 31 and a side sill outer 32 in the vehicle width direction to form a hollow substantially rectangular shape (forming a closed cross section) when viewed in longitudinal section. forming a structure. As shown in FIG. 4, the side sill 3 supports a rail storage portion 6 that stores a lower rail 5 of a sliding door (not shown) that moves along the extending direction of the side sill 3. A reinforcing member 33 for reinforcing the side sill 3 and a bulkhead 34 are provided between the side sill inner 31 and the side sill outer 32 (see FIG. 6).

<Side sill inner>
As shown in FIG. 6, the side sill inner 31 is an inner half that forms the vehicle interior side of the side sill 3. The side sill inner 31 is made of a member that is approximately U-shaped (approximately hat-shaped) in cross-sectional view and has an opening 31a that opens toward the outside of the vehicle in the vehicle width direction. Between the front end and the rear end of the side sill 3, a side sill inner upper flange 31b is formed at the upper end of the side sill inner 31, and a side sill inner lower flange 31c is formed at the lower end of the side sill inner 31.

As shown in FIG. 4 or FIG. 8, the side sill inner 31 includes the lower end of the center pillar inner 21, the outer end of the floor panel 7 in the vehicle width direction, and the outer end of the floor cross member 8 in the vehicle width direction. and are joined. As shown in FIG. 4, the side sill inner 31 has first reinforcing portions 33a, 33b on the side sill inner upper flange 31b and the side sill inner lower flange 31c from the vicinity of the connection part 1b with the center pillar 2 to the front corner part 1c. are joined.

<Side sill outer>
As shown in FIG. 6, the side sill outer 32 is an outer half that forms the outer side of the side sill 3. The side sill outer 32 is made of a member that is approximately U-shaped (approximately hat-shaped) in cross-sectional view. The side sill outer 32 is arranged to cover the opening 31a of the side sill inner 31. A side sill outer upper flange 32a is formed at the upper end of the side sill outer 32, and a side sill outer lower flange 32b is formed at the lower end of the side sill outer 32. As shown in FIGS. 2 and 3, a V-groove portion 32c for distributing load is formed in the connection portion 1b of the side sill outer 32 with the center pillar outer 22.

≪Reinforcement member≫
As shown in FIG. 4, the reinforcing member 33 is a metal plate member for reinforcing the side sill 3. The reinforcing member 33 is particularly arranged over the corner portion 1c from the vicinity of the connection portion 1b between the side sill inner 31 and the center pillar 2 to the front of the vehicle. Therefore, the corner portion 1c is reinforced by a reinforcing member 33. As shown in FIG. 6, the reinforcing member 33 is sandwiched between the side sill inner 31 and the side sill outer 32, and is disposed at the connecting portion between the center pillar 2 and the side sill 3 so as to cover the opening 31a.

As shown in FIG. 5, the reinforcing member 33 is formed of a substantially heptagonal metal plate member when viewed from the front. The reinforcing member 33 has first reinforcing parts 33a, 33b, a second reinforcing part 33c, an inclined edge 33d, a flange part 33f, an opening 33h, a cut part 33k, and a ridge line 33m. .

<First reinforcement part>
As shown in FIG. 5 or 6, the first reinforcing portions 33a, 33b are flanges connected to both ends of the opening 31a of the side sill inner 31 in the vertical direction in the reinforcing member 33. The upper first reinforcing portion 33a is reinforced by being sandwiched and joined by the side sill inner upper flange 31b and the side sill outer upper flange 32a. Further, the lower first reinforcing portion 33b is reinforced by being sandwiched and joined by the side sill inner lower flange 31c and the side sill outer lower flange 32b. The boundary portion between the first reinforcing portions 33a, 33b and the main body of the reinforcing member 33 is reinforced by ridge lines 33m formed by bending into a stepped shape and extending in the front-rear direction. Further, as shown in FIG. 4, the upper first reinforcing part 33a joins the corner part 1c from the vicinity of the connection part 1b between the side sill inner 31 and the center pillar 2 to the front of the vehicle to the side sill inner 31 and the side sill outer 32. It is reinforced by doing so.
Therefore, the connecting portion 1b between the center pillar 2 and the side sill 3 is reinforced by the reinforcing member 33, so that desired strength can be obtained.

<Second reinforcement part>
As shown in FIG. 4 or 5, the second reinforcing portion 33c is a flange that is connected only to one end (rear end) of the rail storage portion 6 in the front-rear direction and joined to the rail storage portion 6. It is. The second reinforcing portion 33c is formed by bending the rear end portion of the reinforcing member 33 into an L-shape in plan view so as to be joined to the front end portion of the rail storage portion 6 in abutting manner. As shown in FIG. 5, the vertical dimension L4 of the second reinforcing portion 33c is smaller than the vertical dimension L3 of the first reinforcing portions 33a and 33b.

As shown in FIG. 4, the second reinforcing portion 33c extends toward the rail storage portion 6 while becoming narrower from the first reinforcing portions 33a and 33b, and is connected to the rail storage portion 6 by abutting against it. Therefore, the portion of the reinforcing member 33 on the rear side of the first reinforcing portions 33a and 33b is separated from the upper and lower flanges of the side sill inner 31 and the side sill outer 32 and is not joined. Therefore, the portions of the reinforcing member 33 on the rear side of the first reinforcing portions 33a, 33b have weaker rigidity than the portions where the first reinforcing portions 33a, 33b are present, and the side sill inner 31 is deformed into an open mouth in the event of a side collision. It's getting easier.
Furthermore, since the rail storage portion 6 is joined to the second reinforcing portion 33c of the reinforcing member 33, the load of the lower rail 5 and the sliding door (not shown) is supported by the reinforcing member 33 and transmitted to the side sill 3. is now possible.

<Slope edge>
As shown in FIG. 5, the inclined edge portion 33d is formed between the lower first reinforcing portion 33b and the second reinforcing portion 33c so as to be diagonally upward rearward with respect to the side sill 3 extending in the front-rear direction. It is the edge. The inclined edge portion 33d is formed by cutting a triangular cut portion 33k in the reinforcing member 33. The inclined edge portion 33d is not joined to members such as the side sill inner 31 and the side sill outer 32. Furthermore, the upper first reinforcing portion 33a facing the inclined edge 33d and the flange portion 33f are not joined to the side sill 3 either. Therefore, the strength of the rear part of the reinforcing member 33 is weak due to the formation of unjoined parts such as the inclined edge 33d and the cut part 33k, and in the event of a side collision, the second reinforcement The side sill inner 31 can be easily opened up and down near the portion 33c.

<Flange part>
As shown in FIG. 5, the flange portion 33f is formed by bending the rear end portion of the reinforcing member 33 into a substantially L-shape when viewed in cross section. The flange portion 33f is bent at an obtuse angle when viewed from the side. A second reinforcing portion 33c is formed in a vertically formed portion (rear end portion of the reinforcing member 33) on the lower side of the flange portion 33f. The reinforcing member 33 is formed so that the width in the vertical direction gradually narrows from the upper end of the flange portion 33f and the rear end of the lower first reinforcing portion 33b toward the second reinforcing portion 33c.

<Opening>
The above-mentioned opening 33h is formed by punching out the reinforcing member 33, so that it can be used as a lightening hole to reduce the weight of the reinforcing member 33, or a welding torch (not shown) is used when connecting the side sill inner 31 to the center pillar inner 21. ) is a hole for inserting and welding. The openings 33h are elongated holes of various sizes formed in a plurality of locations on the reinforcing member 33 at appropriate intervals and elongated in the vertical direction.

<Cut section>
By cutting the lower side of the inclined edge 33d, the cut portion 33k disperses the stress applied during a side collision, and reduces the opening amount L2 (see FIG. 7) in which the side sill inner 31 is deformed during a side collision. This is a portion for making the mouth opening amount larger than the mouth opening amount L1 (see FIG. 4) before the side collision. The cut portion 33k is formed at a position closer to the rear side of the lower end of the reinforcing member 33. As shown in FIG. 4, the reinforcing member 33 deforms the opening of the side sill inner 31 by adjusting the size of the cut part 33k and controlling the joining range of the joining part in the lower first reinforcing part 33b. This makes it possible to adjust the mouth opening amount L2 (see FIG. 7). Further, the reinforcing member 33 is made smaller and lighter by forming the cut portion 33k and a plurality of through holes.

<Ridge line>
As shown in FIG. 5, the ridgeline 33m is a location for reinforcing the first reinforcing portions 33a, 33b. The ridgeline 33m is reinforced by bending the lower end of the upper first reinforcing part 33a and the upper end of the lower first reinforcing part 33b into a stepped shape.

≪Bulkhead≫
As shown in FIG. 4, the bulkhead 34 is a reinforcing member made of a metal plate that partitions the hollow part of the side sill 3 into front and rear parts. The bulkhead 34 is arranged within the hollow portion of the side sill 3 so as to be spaced apart rearward from the rear end portion of the center pillar inner 21 . The bulkhead 34 functions to prevent the side sill inner 31 and the side sill outer 32 from separating in the event of a collision. The bulkhead 34 has an upper flange 34a, a lower flange 34b, a joint piece 34c, and a partition surface 34d.

The partition surface 34d is a bulkhead main body arranged to partition the inside of the side sill inner 31 into front and rear sections.
The upper flange 34a is a protruding piece that extends upward from the outer peripheral edge of the partition surface 34d and is joined to the side sill inner upper flange 31b.
The lower flange 34b is a protruding piece that extends downward from the outer peripheral edge of the partition surface 34d and is joined to the side sill inner lower flange 31c.
The joining piece 34c is a protruding piece that is formed by bending the outer periphery of the partition surface 34d in the front-rear direction and is joined to the inner wall of the side sill inner 31.

≪Rail storage section≫
As shown in FIG. 4, the rail storage section 6 is formed into a hat shape when viewed in longitudinal section with the outside of the vehicle open, and a part of the front side is attached to a floor panel 7 (see FIG. 8) located inside the vehicle interior. It is formed into a bag shape and protrudes downward. A lower rail 5 of a sliding door is laid on the upper side of the inner surface of the rail storage section 6. A guide roller (not shown) is rolled along the lower rail 5, and the sliding door (not shown) is configured to slide in the longitudinal direction of the vehicle to open and close the door opening 1a. .

≪Floor panels, floor frames and floor cross members≫
The floor panel 7 shown in FIG. 8 is a metal plate member that forms the floor surface of the vehicle interior. The floor panel 7 is installed between the left and right side sills 3.
The floor frame 9 is a metal frame member that holds the floor panel 7 from below and has a substantially hat shape when viewed in longitudinal section. The floor frame 9 has, for example, a front end connected to a rear part of a front side frame (not shown), and a rear end connected to the floor cross member 8.
The floor cross member 8 is a metal frame member that is installed between the left and right side sills 3 and has a substantially hat shape when viewed in longitudinal section. The floor cross member 8 is made up of two members extending in the vehicle width direction before and after the fuel tank T.

≪Fuel tank≫
The fuel tank T is arranged, for example, between the left and right side sills 3 with an appropriate interval therebetween. The fuel tank T has a front end fixed to the front floor cross member 8, a rear end fixed to the rear floor cross member 8, and a tank holding band member Ta installed on the front and rear floor cross members 8. Retained.

[Effect of vehicle reinforcement structure]
The reinforcing structure for the vehicle C according to this embodiment is basically configured as described above. Next, with reference to FIGS. 1 to 9, the effect of the reinforcing structure for the vehicle C according to the embodiment of the present invention will be explained using, as an example, a case where the vehicle C side-collides with a pole imitating a utility pole, as disclosed in Patent Document 1. This will be explained in comparison with the vehicle body structure described in .

As shown in FIG. 4, a reinforcing member 33 is bonded to the corner portion 1c extending from the vicinity of the connection portion 1b between the side sill inner 31 and the center pillar 2 to the front of the vehicle for reinforcement. Therefore, the connecting portion between the center pillar 2 and the side sill 3 is reinforced by the reinforcing member 10 and has desired strength.

The reinforcing member 33 is arranged such that the upper and lower first reinforcing parts 33a and 33b are sandwiched and joined between the side sill inner 31 and the side sill outer 32 (see FIG. 6), and connect the upper and lower parts of the opening 31a. The side sill 3 below the corner portion 1c is partially reinforced.

Further, the reinforcing member 33 is formed so that the width in the vertical direction gradually becomes narrower from the upper and lower first reinforcing parts 33a and 33b toward the second reinforcing part 33c at the rear end, and the second reinforcing part at the rear end 33c is joined to the rail storage section 6 and holds the rail storage section 6.

As shown in FIG. 5, the reinforcing member 33 has a triangular cut portion 33k extending from the first reinforcing portion 33b on the lower side to the second reinforcing portion 33c on the rear end, so that the inclined edge portion 33d is cut. As a result, the entire reinforcing member 33 is miniaturized.
Further, since the reinforcing member 33 is formed with the inclined edge 33d, as shown in FIG. 6, the lower rear portion of the reinforcing member 33 is not welded to the side sill inner 31 and the side sill outer 32. Therefore, since the inclined edge 33d of the reinforcing member 33 is not supported by the side sill inner 31 and the side sill outer 32, a portion of the reinforcing member 33 near the rear end is in a fragile state. As a result, the vertical opening of the opening 31a of the side sill inner 31 is not restricted.

Normally, the opening amount L1 (length in the vertical direction) of the side sill inner 31 below the center pillar 2 has a length shown in FIG. 4 .

As shown in FIG. 7 or 8, when the vehicle C side-collides with a pole imitating a telephone pole, the side sill 3 is subjected to a collision load F1 in the vehicle width direction position by the pole, and is pressed by the collision load F1. It will be crushed.

As shown in FIG. 7, the corner portion 1c where the first reinforcing portions 33a and 33b of the reinforcing member 33 of the side sill inner 31 are joined has the opening 31a covered by the reinforcing member 33, so Improved rigidity against bumps. In other words, the portion of the vehicle C that makes a side collision with the pole is reinforced with the reinforcing member 33.

The rear portion of the first reinforcing portions 33a, 33b of the reinforcing member 33 is narrow from the first reinforcing portions 33a, 33b toward the rail storage portion 6, and has a weak inclined edge 33d (cut portion 33k (see FIG. 5). )) is formed. Therefore, in the event of a side collision, the portion (slanted edge 33d) on the rear side of the upper and lower first reinforcing portions 33a and 33b is deformed to open and become longer in the vertical direction, as shown in FIG. Since the stress applied during a side collision can be dispersed, appropriate lateral rigidity, torsional rigidity, and bending rigidity at the ground contact point can be maintained.

As shown in FIG. 7, since there is no reinforcing member 33 in the rear side of the reinforcing member 33 of the side sill inner 31, opening deformation is promoted and the opening deformation is larger than that in the part where the reinforcing member 33 is present. It absorbs the collision load F1 (see Fig. 8). The opening amount L2 of the side sill inner 31 is larger than the opening amount of the substantially trapezoidal reinforcing member described in Patent Document 1.

In this way, the side sill inner 31 is made easy to collapse so that the opening amount L2 becomes large in the event of a side collision, so that the side sill inner 31 is deformed to open in the event of a side collision and absorbs the collision load F1. Therefore, as shown in FIGS. 8 and 9, the intrusion amount C1 inward in the vehicle width direction at the time of a side collision can be made smaller than the intrusion amount of the side sill described in Patent Document 1.

As described above, the present invention provides a side sill inner 31 having a substantially U-shaped cross section and having an opening 31a that opens toward the outside of the vehicle in the vehicle width direction, and a side sill inner 31 that covers the opening 31a, as shown in FIG. 4 or 6. This is a reinforcing structure for a vehicle C including a side sill 3 having a side sill outer 32 provided as shown in FIG. , supports a rail storage part 6 that stores a lower rail 5 of a sliding door (not shown) that moves along the extending direction of the side sill 3, and the reinforcing member 33 is attached to both ends of the opening 31a in the vertical direction. It has first reinforcing parts 33a, 33b connected to the rail storage part 6, and a second reinforcing part 33c connected only to one end of the rail storage part 6 in the front-rear direction.

According to this configuration, the reinforcing structure of the vehicle C (see FIG. 1) of the present invention is, as shown in FIG. It is reinforced with a member 33. Therefore, the reinforcing member 33 can prevent the collision area of the side sill 3, which receives the collision load F1 at the time of a side collision, from penetrating too much inside the vehicle body.
As shown in FIG. 4, the reinforcing member 33 has first reinforcing parts 33a and 33b connected to both vertical ends of the opening 31a of the side sill inner 31, and one end of the rail storage part 6 in the front and back direction. The second reinforcing portion 33c is connected only to the second reinforcing portion 33c. In this way, since the reinforcing member 33 does not connect the second reinforcing portion 33c to the side sill inner 31, the side sill inner 31 is easily deformed in the vertical direction. Therefore, the reinforcing member 33 can absorb the collision load F1 by promoting the opening deformation of the side sill inner 31 in the event of a side collision. By reducing the intrusion amount C1, it is possible to prevent the deformed side sill 3 from intruding too far inward in the vehicle width direction beyond a desired range.

Further, as shown in FIG. 4, the second reinforcing portion 33c extends from the first reinforcing portions 33a and 33b toward the rail storage portion 6 while becoming narrower, and is connected to the rail storage portion 6 by abutting against it.

According to this configuration, the reinforcing member 33 shown in FIG. 4 is connected to the rail storage section 6 by the second reinforcing section 33c. Therefore, the reinforcing member 33 can firmly hold the rail storage section 6 that supports the lower rail 5 and the slide door (not shown). In addition, the reinforcing member 33 is narrowly formed from the first reinforcing portions 33a, 33b toward the rail storage portion 6, so that the area thereof is reduced, so that weight reduction can be achieved.

Further, as shown in FIG. 4, the first reinforcing portions 33a and 33b reinforce the corner portion 1c from the vicinity of the connecting portion 1b between the side sill inner 31 and the center pillar 2 to the front of the vehicle.

According to this configuration, the reinforcing member 33 reinforces the corner portion 1c from the connecting portion 1b between the side sill inner 31 and the center pillar 2 by the first reinforcing portions 33a and 33b, so that the center pillar 2 and the side sill 3 are reinforced. It can improve the strength of the connection point and securely fix it.

Further, as shown in FIG. 4, the reinforcing member 33 is provided between a first reinforcing part 33b provided at the lower end of the opening 31a and a second reinforcing part 33c, with respect to the side sill 3 extending in the front-rear direction. It has an inclined edge 33d formed diagonally, and the inclined edge 33d extends in the vertical direction from the side sill inner lower flange 31c (lower flange) of the side sill inner 31 and the side sill outer lower flange 32b (lower flange) of the side sill outer 32. They are separated.

According to this configuration, the reinforcing member 33 has an inclined edge spaced apart from the side sill inner lower flange 31c and the side sill outer lower flange 32b in the vertical direction between the first reinforcing part 33b and the second reinforcing part 33c. It has 33d. Therefore, as shown in FIG. 9, in the reinforcing member 33, since the inclined edge 33d is not joined to the side sill inner 31 and the side sill outer 32, the portion where the inclined edge 33d is formed is deformed in the event of a side collision. Collision load F1 can be absorbed.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications and changes can be made within the scope of the technical idea, and the present invention does not extend to inventions made by these modifications and changes. Of course.

For example, in the embodiment described above, a passenger car has been described as an example of the present invention, but any vehicle C having a center pillar 2 and a side sill 3 may be used, or a work vehicle or the like may be used.

1 Vehicle body 1b Connection part 1c Corner part 2 Center pillar 3 Side sill 5 Lower rail 6 Rail storage part 31 Side sill inner 31a Opening part 31c Side sill inner lower flange (lower flange)
32 Side sill outer 32b Side sill outer lower flange (lower flange)
33 Reinforcement members 33a, 33b First reinforcement portion 33c Second reinforcement portion 33d Slanted edge C Vehicle L3 Vertical dimension of first reinforcement portion L4 Vertical dimension of second reinforcement portion

Claims (4)

a side sill inner having a substantially U-shaped cross section and having an opening that opens toward the outside of the vehicle in the vehicle width direction;
a side sill outer provided to cover the opening;
a reinforcing member sandwiched between the side sill inner and the side sill outer and covering the opening;
A reinforcement structure for a vehicle equipped with a side sill having
The side sill supports a rail storage part that stores a lower rail of a sliding door that moves along the extending direction of the side sill,
The reinforcing member is
a first reinforcing portion connected to both ends of the opening in the vertical direction;
a second reinforcing portion connected only to one end in the front-rear direction of the rail storage portion;
Reinforcement structure of the vehicle. The reinforcing structure for a vehicle according to claim 1, wherein the second reinforcing portion extends from the first reinforcing portion toward the rail storage portion while becoming narrower, and is connected to the rail storage portion by abutting against the second reinforcing portion. The reinforcing structure for a vehicle according to claim 1 or 2, wherein the first reinforcing portion reinforces a corner portion from the vicinity of the connection portion between the side sill inner and the center pillar to the front of the vehicle. The reinforcing member includes an inclined edge formed diagonally with respect to the side sill extending in the front-back direction between the first reinforcing part and the second reinforcing part provided at the lower end of the opening. have,
The reinforcing structure for a vehicle according to any one of claims 1 to 3, wherein the inclined edge is vertically spaced apart from the lower flange of the side sill inner and the lower flange of the side sill outer.

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