Side sill structure

Abstract

To provide a side sill structure capable of improving the rigidity of a side sill in comparison with conventional technology, using a simple structure that does not need excessive heating for joining members in the hollow of the side sill.SOLUTION: A side sill structure 10 according to the present invention includes: a side sill S that extends in the vehicle back-and-forth direction at the external side of a vehicle in the vehicle widthwise direction; a plate member 4 that divides at least a part of the cross-section of the side sill in the vehicle widthwise direction; and a resin-made reinforcement 3 which is placed at the external side of the plate member 4 in the vehicle widthwise direction, and which is bonded to the side sill S. Either one of the reinforcement 3 or the plate member 4 includes a plurality of protrusions 33, and the other includes a plurality of insertions 41 into which the plurality of protrusions 33 are inserted, respectively.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a side sill structure. [Background technology]

[0002] In recent years, efforts to provide access to sustainable transport systems that take into consideration vulnerable transport participants such as the elderly, people with disabilities and children have been gaining momentum. To achieve this, we are focusing on research and development to further improve transport safety and convenience through development of improved vehicle rigidity. Conventionally, a side sill structure is known that includes a plate member that divides the closed cross section of the side sill in the vehicle width direction, and a pair of reinforcing members that are arranged in the closed cross section of the side sill so as to sandwich the plate member from both sides in the vehicle width direction (see, for example, Patent Document 1). Each of the reinforcing members of this side sill structure is generally hat-shaped in cross section, and has a bulge that is bonded to the plate member and a flange that is bonded to the inner wall surface of the side sill. According to this side sill structure, the plate member and the reinforcing member ensure the rigidity of the side sill, thereby making it possible to ensure a larger crash stroke of the side sill during a side collision. This allows the side sill to efficiently absorb energy during a side collision. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-143461 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional side sill structures (see, for example, Patent Document 1), the adhesive portion between the reinforcing member and the plate member is located within the hollow closed cross section of the side sill, so heat that promotes the hardening of the adhesive is not easily transmitted to the adhesive portion. If this results in insufficient adhesive strength between the reinforcing member and the plate member, slippage occurs between the reinforcing member and the plate member when a side impact load is input. Therefore, conventional side sill structures may not be able to effectively transmit load during a side impact and may not be able to exhibit sufficient rigidity. In addition, in such side sill structures, a heating process can be additionally performed on the joint between the reinforcing member and the plate member, but this creates a new problem of complicating the manufacturing process of the side sill structure.

[0005] The object of the present invention is to provide a side sill structure that can improve the rigidity of the side sill more than ever before with a simple structure without requiring extra heating to join the members within the closed cross section of the side sill, and thus contribute to the development of a sustainable transportation system. [Means for solving the problem]

[0006] The present invention, which has achieved the above object, provides a side sill structure including a side sill extending in the front-rear direction of the vehicle on the outer side in the vehicle width direction of the vehicle, a plate member that divides at least a part of the cross section of the side sill in the vehicle width direction, and a resin reinforcement member that is disposed on the outer side in the vehicle width direction of the plate member and adhered to the side sill, The reinforcement includes an outer convex portion that is bonded to at least one of the inner peripheral surfaces of the outer wall, upper wall, and lower wall of the side sill via an adhesive that hardens by heating, and an inner convex portion that protrudes toward the plate member, A plurality of protruding portions are provided on one of the reinforcement member and the plate member, and a plurality of insertion portions into which the protruding portions are inserted are provided on the other of the reinforcement member and the plate member. The protruding portion or the inserted portion is formed at an inner end of the inner protrusion, and the protruding portion and the inserted portion are disposed at a position spaced from the adhesive toward the center within the closed cross section of the side sill. It is characterized by: Effect of the Invention

[0007] According to the present invention, it is possible to provide a side sill structure that can improve the rigidity of the side sill compared to conventional methods with a simple configuration without requiring extra heating to join components within the closed cross section of the side sill. [Brief description of the drawings]

[0008] [Figure 1] 1 is a partially enlarged perspective view of a vehicle having a side sill structure according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an exploded perspective view of the side sill structure according to the embodiment of the present invention. [Diagram 3] FIG. 2 is a cross-sectional view taken along line III-III of FIG. [Figure 4] FIG. 4 is a partially enlarged view of a portion IV in FIG. [Diagram 5] FIG. 5 is a cross-sectional view of FIG. 4 . [Figure 6] FIG. 2 is a partially enlarged perspective view showing the arrangement of a bulkhead in the side sill structure according to the embodiment of the present invention. [Figure 7] FIG. 11 is a partially enlarged cross-sectional view showing a modified example of a side sill structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Next, a detailed description will be given of a form (embodiment) for carrying out the side sill structure of the present invention with reference to the drawings as appropriate. Note that the directions of the arrows in the drawings, front-rear, up-down, left-right, and right-left directions, correspond to the front-rear, up-down, left-right directions of the vehicle. In the following description, the left-right direction of the vehicle may be referred to as the vehicle width direction.

[0010] The side sill structure of this embodiment is mainly characterized in that a partition member (plate member) in the closed cross section of the side sill and a resin reinforcing member (reinforce) are joined by fitting. Since a pair of side sill structures are provided on the left and right sides of the vehicle, and these have symmetrical structures, only the right-side side sill structure will be described below, and a detailed description of the left-side side sill structure will be omitted.

[0011] First, prior to describing the side sill structure, the configuration of the vehicle will be described. FIG. 1 is a partially enlarged perspective view of a vehicle having a side sill structure 10 according to an embodiment of the present invention. As shown in FIG. 1, a side sill S constituting a side sill structure 10 is a vehicle frame member extending in the front-rear direction of the vehicle on a side of a lower part of the vehicle. Both outer edge portions of the floor panel 8a in the vehicle width direction are joined by spot welding or the like to the inner side portions of the left and right side sills S (the left side sill is not shown in FIG. 1) in the vehicle width direction.

[0012] A floor tunnel 8b that partially rises in the center in the vehicle width direction and extends in the front-rear direction is integrally formed with the floor panel 8a. In addition, a floor cross member 8c extending in the vehicle width direction is disposed on the floor panel 8a. The floor cross member 8c has a hat shape that opens downward in a cross section intersecting with the extending direction. A flange F10 of the floor cross member 8c that corresponds to a brim of the hat shape is joined to the floor panel 8a by spot welding or the like.

[0013] An outer end portion of the floor cross member 8c in the vehicle width direction is welded to the inner side, in the vehicle width direction, of the side sill S. In addition, an inner end portion of the floor cross member 8c in the vehicle width direction is welded to a side portion of the floor tunnel 8b. In this embodiment, the floor cross members 8c are assumed to be arranged in a pair in parallel at the front and rear on the floor panel 8a, but the number of floor cross members 8c is not limited to this.

[0014] As shown in FIG. 1, the side sill S is provided with a center pillar 6 extending upward from the side sill S. The center pillar 6 has an inner pillar 6a disposed on the inside in the vehicle width direction, an outer pillar 6b ​​disposed on the outside in the vehicle width direction, and a stiffener 7 (see FIG. 2) which will be described later.

[0015] FIG. 2 is an exploded perspective view of the side sill structure 10. As shown in FIG. 2, the pillar inner portion 6a is formed of a generally plate-like body whose front-rear width gradually increases from the top to the bottom. The leading and trailing edges of the inner pillar 6a each extend in a direction along the upper surface of the side sill S (see FIG. 1) and form a gentle curve that is concave downward as it approaches the side sill S.

[0016] Both ends of the lower side of the pillar inner 6a in the front-rear direction are sandwiched between an upper flange F6 of the side sill inner 2 and an upper flange F4 of the side sill outer 1, which will be described later, and are joined by spot welding or the like in a three-layered configuration. The pillar inner 6a is also joined to a flange F2 of the stiffener 7 by spot welding or the like.

[0017] As shown in FIG. 2, the pillar outer 6b has a base portion 6b1 with an L-shaped cross section that is arranged to cover the outer side of the side sill S in the vehicle width direction, and a main body portion 6b2 that extends upward from this base portion 6b1 to form a closed cross section between itself and the pillar inner 6a. The main body portion 6b2 has substantially the same planar shape as the inner pillar 6a in a side view of the vehicle. The main body 6b2 has a hat shape in cross section. A flange F1 of the pillar outer panel 6b overlapping the pillar inner panel 6a is joined to the pillar inner panel 6a by spot welding or the like, so that a closed cross section is formed on the inside of the center pillar 6.

[0018] The stiffener 7 is formed to correspond to the pillar outer 6b, and is disposed in the closed cross section of the center pillar 6. A lower portion 7a of the stiffener 7 is joined by spot welding or the like from the upper surface to the side surface of the side sill outer 1, which will be described next. An upper portion 7b of the stiffener 7 has a hat shape in cross section. The upper portion 7b of the stiffener 7 is joined to an outer surface of the pillar inner member 6a in the vehicle width direction at a flange F3 by spot welding or the like.

[0019] Next, the side sill structure 10 of the present embodiment will be described. As shown in FIG. 2, the side sill S constituting the side sill structure 10 includes a side sill inner 2, a side sill outer 1, a plate member 4, a reinforcement 3, and a bulkhead 5. The side sill inner panel 2 is disposed on the inside in the vehicle width direction (left side in FIG. 2) and has a hat shape that opens outward in the vehicle width direction in a cross section intersecting the longitudinal direction (front-rear direction in FIG. 2). Specifically, the side sill inner panel 2 is configured to have a bulging portion 24, an upper flange F6, and a lower flange F7.

[0020] The side sill outer 1 is disposed on the outer side of the side sill inner 2 in the vehicle width direction (right side in FIG. 2) so as to sandwich the plate member 4 between the side sill outer 1 and the side sill inner 2. The side sill outer 1 has a hat shape that opens inward in the vehicle width direction in a cross section intersecting the longitudinal direction (front-rear direction in FIG. 2). Specifically, the side sill outer 1 is configured to have a bulging portion 14, an upper flange F4, and a lower flange F5. In FIG. 2, the reference symbol B denotes a bracket that attaches the base portion 6b1 of the pillar outer 6b to the side sill outer 1. This bracket B is an elongated member having an L-shaped cross section that extends along the extension direction of the side sill S (front-rear direction in FIG. 2). The bracket B is attached to the outer surface of the side sill outer 1 by spot welding or the like.

[0021] The plate member 4 is formed of a long, substantially flat plate extending along the longitudinal direction of the side sill S (the front-rear direction in FIG. 2) with its plate surface facing in the vehicle width direction. The plate member 4 is disposed directly below the center pillar 6 (inner pillar 6a). The plate member 4 has a plurality of elongated round through holes 42 formed in the longitudinal direction (front-rear direction) of the plate member 4. Specifically, the plurality of elongated round through holes 42 arranged at equal intervals in the front-rear direction are arranged in three rows in a staggered manner in the up-down direction. Of these oblong through holes 42, those aligned in the middle of the three rows become inserted portions 41 (see FIG. 4) into which the protruding portions 33 (see FIG. 4) of the reinforcement 3 are inserted, as will be described in detail later. The inserted portion 41 will be described in detail later together with the reinforcement 3.

[0022] The reinforcement 3 is a long resin member having a substantially W-shaped cross section extending along the extension direction of the side sill S (the front-rear direction in FIG. 2). The reinforcement 3 is disposed inside the bulging portion 14 of the side sill outer 1. As shown in FIG. 3, which is a cross-sectional view taken along the line III-III in FIG. 1, the reinforcement 3 has a pair of upper and lower outer protrusions 31, and an inner protrusion 32 protruding toward the plate member 4 between the outer protrusions 31.

[0023] The upper outer protrusion 31 is formed so as to be in close contact with the upper wall 11 and the outer wall 12 at the corner formed by the upper wall 11 and the outer wall 12 of the side sill outer 1. The upper outer protrusion 31 is bonded with an adhesive A from the upper wall 11 to the outer wall 12 so as to be integrated with the side sill outer 1. The lower outer protrusion 31 is formed on the corner side between the lower wall 13 and the outer wall 12 of the side sill outer panel 1 so as to be in close contact with the lower wall 13 and the outer wall 12. The lower outer protrusion 31 is bonded with an adhesive A from the lower wall 13 to the outer wall 12 so as to be integrated with the side sill outer panel 1.

[0024] In the present embodiment, the adhesive A is assumed to be, for example, an epoxy-based or urethane-based structural adhesive, but is not limited to this. In Fig. 3, reference symbol 6b denotes a pillar outer, reference symbol 7 denotes a stiffener, and reference symbol B denotes a bracket. Reference symbol G denotes a side sill garnish which is not shown in Fig. 1 and Fig. 2. This side sill garnish G shown by a virtual line (two-dot chain line) is a long plate-like member arranged so as to cover roughly the lower half of the side sill S in the longitudinal direction (the direction perpendicular to the paper surface of Fig. 3) from the outside in the vehicle width direction.

[0025] FIG. 4 is a partial enlarged view of part IV in FIG. As shown in FIG. 4, the inner convex portion 32 of the reinforcement 3 has a protruding portion 33 formed thereon. The protruding portion 33 extends toward the plate member 4 from an inner end portion 32 a facing the plate surface of the plate member 4 as a base end, and is inserted into the oblong through hole 42 of the plate member 4 .

[0026] Here, the oblong through-hole 42 in the plate member 4 will be described in more detail. 3, the oblong through hole 42 serving as the inserted portion 41 of the plate member 4 into which the protruding portion 33 is inserted is formed to be located in the middle of three rows of oblong through holes 42 arranged in the vertical direction. Specifically, the inserted portions 41 are formed in the plate member 4 so as to be lined up in the front-rear direction (the direction perpendicular to the paper surface of FIG. 3) at positions facing the inner protrusions 32 in the vehicle width direction.

[0027] 4, the inserted portion 41 of the plate member 4 has a tubular portion 43 extending inward in the vehicle width direction from the periphery of an elongated through hole 42, which is the edge 41a of the inserted portion 41. This tubular portion 43 forms a collar portion into which the protruding portion 33 of the reinforcement 3 is fitted. The elongated through hole 42 and the tubular portion 43 in the inserted portion 41 can be formed simultaneously by subjecting the plate member 4 made of a steel plate to burring processing.

[0028] FIG. 5 is a cross-sectional view taken along line VV of FIG. 5, the elongated through-hole 42 serving as the inserted portion 41 of the plate member 4 has a length L1 in the longitudinal direction (front-rear direction) of the side sill S (see FIG. 1) that is longer than a length L2 in the up-down direction perpendicular to the longitudinal direction. Specifically, the elongated through-hole 42 has a substantially track-shaped inner peripheral edge having a pair of front and rear arc portions 42a and a pair of upper and lower parallel straight portions 42b.

[0029] 5, the protruding portion 33 of the reinforcement 3 to be inserted into such an inserted portion 41 has a generally track-shaped outer shape that fits into the oblong through-hole 42. That is, the outer shape of the protruding portion is formed such that the length L3 in the longitudinal direction (front-rear direction) of the side sill S is longer than the length L4 in the up-down direction perpendicular to the longitudinal direction. The elongated through hole 42 and the protruding portion 33 have a relationship of L1>L3 and L2>L4, and there is a slight clearance C between the elongated through hole 42 and the protruding portion 33. Although not shown in the drawings, such clearance C may be formed so that at least a part of the elongated through hole 42 and the protruding portion 33 is separated from each other.

[0030] In this embodiment, the protruding portion 33 (see FIG. 4) is assumed to be a solid body that fits inside the tubular portion 43 of the inserted portion 41. However, the protruding portion 33 may also be formed of a tubular body 33a shown by the imaginary line (two-dot chain line) in FIG. The above-described reinforcement 3 is formed of resin. Specifically, the reinforcement 3 has a reinforcement body 34 having a substantially W-shaped cross section formed of fiber-reinforced resin, and the protruding portion 33 formed of fiber-free resin. Such a reinforcement 3 can be manufactured by a known molding method such as an RTM (Resin Transfer Molding) method.

[0031] As shown in FIG. 2, the bulkhead 5 is disposed within the bulging portion 24 of the side sill inner panel 2 so as to be located more inward than the plate member 4 in the vehicle width direction. In this embodiment, the bulkhead 5 has a hat shape that opens inward in the vehicle width direction (to the left in FIG. 1) in cross section.

[0032] As shown in FIG. 2, the bulkhead 5 has a flange F8 formed at a position corresponding to the hat-shaped brim portion, and flanges F9 formed at the upper and lower ends of the bulkhead 5 (the upper flange is not shown in FIG. 2). 3, the flange F8 is joined by spot welding or the like to the inner wall 22 of the side sill inner panel 2. The upper flange F9 is joined by spot welding or the like to the upper wall 21 of the side sill inner panel 2. The lower flange F9 is joined by spot welding or the like to the lower wall 23 of the side sill inner panel 2.

[0033] Fig. 6 is a partially enlarged perspective view showing the arrangement of the bulkhead 5. Fig. 6 is a perspective view showing the side sill S as viewed from inside the vehicle, and the center pillar 6 (see Fig. 1) is omitted in Fig. 6 for convenience of drawing. In Fig. 6, the bulkhead 5 is indicated by a hidden line (dotted line). 6, the bulkheads 5 in this embodiment are disposed spaced apart from each other in the longitudinal direction (front-rear direction) of the side sill S so as to correspond to each of the pair of floor cross members 8c described above. The bulkheads 5 are formed to have substantially the same width as the front-rear width of the floor cross members 8c. In other words, the position of the bulkheads 5 within the bulging portion 24 of the side sill inner panel 2 coincides with the joint between the floor cross member 8c and the side sill inner panel 2 in the front-rear direction.

[0034] According to the side sill structure 10 described above, as shown in FIG. 3, the side impact load Ld input to the side sill outer 1 is efficiently transmitted to the pair of upper and lower outer convex portions 31 of the reinforcement 3, the inner convex portion 32 of the reinforcement 3, the plate member 4, the bulkhead 5, the side sill inner 2, and the floor cross member 8c.

[0035] <Action and effect> The following describes in more detail the effects and advantages of the side sill structure 10 according to this embodiment. In the side sill structure 10 according to this embodiment, the reinforcement 3 has a plurality of protruding portions 33, and the plate member 4 has a plurality of inserted portions 41 into which the protruding portions 33 are inserted. According to this side sill structure 10, when a side impact load is input, slippage is prevented between the reinforcement 3 and the plate member 4. The side impact load is more reliably transmitted from the reinforcement 3 to the plate member 4. As a result, the side sill structure 10 can improve the rigidity of the side sill S and suppress deformation. Furthermore, since the side sill structure 10 is connected by fitting the reinforcement 3 and the plate member, unlike the conventional side sill structure 10 (see, for example, Patent Document 1), the heating process for hardening the adhesive can be omitted, and the manufacturing process can be simplified.

[0036] In such a side sill structure 10, the reinforcement 3 is adhered to three surfaces of the side sill outer 1, namely the outer wall, upper wall and lower wall, by its outer protrusion 31, and is fitted into the plate member 4 by its inner protrusion 32. According to this side sill structure 10, the side collision load is more effectively transmitted from the reinforcement 3 to the plate member 4. The rigidity and deformation suppression performance of the side sill S are further improved.

[0037] In addition, in such a side sill structure 10, the inserted portion 41 of the plate member 4 is formed by a tubular portion 43 into which the protruding portion 33 of the reinforcement 3 is fitted. According to this side sill structure 10, it is possible to increase the contact area between the protruding portion 33 and the inserted portion 41. As a result, the side sill structure 10 can more reliably maintain the engagement between the reinforcement 3 and the plate member 4 when a side impact load is transmitted from the reinforcement 3 to the plate member 4. The side impact load is more reliably transmitted from the reinforcement 3 to the plate member 4.

[0038] In addition, in such a side sill structure 10, the protrusion 33 is formed as a solid body. According to this side sill structure 10, deformation of the protruding portion 33 can be effectively suppressed when a side collision load is input, and the rigidity of the side sill S can be further improved. In addition, in such a side sill structure 10, the protruding portion 33 can also be formed of a cylindrical body 33a (see FIG. 4). According to this side sill structure 10, by making the protruding portion 33 hollow, it is possible to reduce the weight of the side sill structure 10 while maintaining the contact area between the protruding portion 33 and the inserted portion 41. Furthermore, according to this side sill structure 10, the space formed between the reinforcement 3 and the side sill outer 1 and the space formed between the plate member 4 and the side sill inner 2 can be connected via the cylindrical body 33a.

[0039] In addition, in such a side sill structure 10, the reinforcement body 34 consisting of the outer convex portion 31 and the inner convex portion 32 of the reinforcement 3 is formed from fiber-reinforced resin, and the protrusion 33 is formed from fiber-free resin. Assuming that the reinforcement 3 has both the reinforcement body 34 and the protruding portion 33 formed of fiber-reinforced resin, the orientation of the reinforcing fibers in the reinforcement body 34 will be disturbed near the protruding portion 33 due to the reinforcing fibers extending continuously from the reinforcement body 34 to the protruding portion 33. This may cause the rigidity of the reinforcement body 34 to decrease. In contrast, the protruding portion 33 in this embodiment is formed from a fiber-free resin, and therefore does not disturb the orientation of the reinforcing fibers in the reinforcement body 34. According to this side sill structure 10, it is possible to ensure good rigidity of the reinforcement 3 while allowing the reinforcement 3 to be fitted to the plate member 4.

[0040] In such a side sill structure 10, the protruding portion 33 and the elongated through hole 42 (long hole) serving as the inserted portion 41 are elongated in the longitudinal direction (front-rear direction) of the side sill S. In addition, the side sill structure 10 has a clearance between the protruding portion 33 and the elongated through hole 42 (long hole) such that at least a portion of them is separated from each other. According to such a side sill structure 10, a moment generated in the side sill S during a side collision causes the protruding portion 33 and the inner periphery of the oblong through hole 42 (long hole) in the inserted portion 41 to abut against each other in the vehicle up-down direction.

[0041] At this time, in the side sill structure 10 of the present embodiment, since the protruding portion 33 and the oblong through hole 42 are elongated in the longitudinal direction (front-rear direction) of the side sill S, it is possible to increase the contact area between the protruding portion 33 and the oblong through hole 42. Slippage between the reinforcement 3 and the plate member 4 is more reliably prevented. Furthermore, such a side sill structure 10 can absorb variation in the relative positions in the longitudinal direction between the elongated through hole 42 (long hole) and the protrusion 33 when inserting the protrusion 33 of the reinforcement 3 into the elongated through hole 42 (long hole) of the plate member 4. The side sill structure 10 can more reliably fit the elongated through hole 42 (long hole) and the protrusion 33. In addition, the oblong through-hole 42 (long hole) formed in the plate member 4 also serves as a passage for the electrodeposition coating liquid when electrodeposition coating is performed on the vehicle body. According to such a side sill structure 10, electrodeposition coating can be performed evenly within the closed cross section of the side sill S.

[0042] Moreover, the plate member 4 of such a side sill structure 10 is disposed directly below the center pillar 6 (inner pillar 6a). According to such a side sill structure 10, the side collision load received by the reinforcement 3 can be transmitted to the center pillar 6 via the plate member 4. The rigidity and deformation suppression performance of the side sill S are further improved.

[0043] Moreover, the side sill S of such a side sill structure 10 includes a plurality of bulkheads 5 spaced apart in the longitudinal direction (front-rear direction) of the side sill S within a cross section on the inner side of the plate member 4 in the vehicle width direction. According to such a side sill structure 10, the bulkhead 5 is deformed by a side impact load, so that energy absorption during a side impact can be performed more efficiently. Furthermore, according to this side sill structure 10, the reinforcement 3 on the outside of the plate member 4 and the multiple bulkheads 5 on the inside of the plate member 4 work together during a side collision, thereby efficiently dispersing the side collision load.

[0044] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and can be embodied in various forms. In the above embodiment, a fitting structure is described in which a protrusion 33 is formed on the reinforcement 3 and the inserted portion 41 of this protrusion 33 is formed on the plate member 4, but the fitting structure between the reinforcement 3 and the plate member 4 is not limited to this.

[0045] FIG. 7 is a partially enlarged cross-sectional view showing a modification of the side sill structure 10 of the embodiment, and corresponds to FIG. 7, the side sill structure 10 according to the modified example has a tubular portion 44a that serves as a protrusion 44 in the plate member 4. It is assumed that this tubular portion 44a is formed by subjecting the plate member 4 to burring processing. The inner protrusion 32 of the reinforcement 3 has an inserted portion 35 formed as a through hole into which the cylindrical portion 44a is inserted.

[0046] According to such a side sill structure 10, unlike the reinforcement 3 having the protruding portion 33 (see FIG. 4) in the above embodiment, the structure of the reinforcement 3 is simplified. Also, according to such a side sill structure 10, the reinforcement 3 portion formed of the reinforced fiber resin fits with the protruding portion 44 of the plate member 4, so that the strength of the fitting structure is further improved.

[0047] In the embodiment, the cross-sectional shape of the protruding portion 33 and the planar shape of the inserted portion 41 (hole) are not particularly limited as long as they are long in the longitudinal direction (front-rear direction) of the side sill S, and may be, for example, a rectangle that is long in the front-rear direction.

[0048] In addition, in the embodiment, the inserted portion 41 (see Figure 4) is shown to have an elongated round through hole 42 (see Figure 4) and a tubular portion 43 (see Figure 4), but the present invention does not exclude inserted portion 41 that omits tubular portion 43 and is composed only of an elongated round through hole 42. [Explanation of symbols]

[0049] 3 Reinforcement 4 Plate members 5. Bulkhead 10 Side sill structure 11 Upper wall of outer side sill (upper wall of side sill) 12 Outer wall of side sill outer (outer wall of side sill) 13 Upper wall of outer side sill (lower wall of side sill) 31 Outer convex part of reinforcement 32 Inner convex part of reinforcement 32a Inner end of inner protrusion 33 Protrusion 33a cylinder 35 Inserted part 41 Inserted part 41a Edge of inserted portion of plate member 42 Oval through hole (oblong hole) 43 Cylindrical portion of plate member 44 Protrusion A Adhesive L1: Length of the inserted part in the longitudinal direction L2 Length in the direction perpendicular to the longitudinal direction of the inserted part L3 Longitudinal length of protrusion L4 Length of the protrusion in the direction perpendicular to the longitudinal direction S side sill

Claims

1. A side sill extending in a front-rear direction of the vehicle on an outer side in a vehicle width direction of the vehicle; A plate member that divides at least a portion of a cross section of the side sill in a vehicle width direction; A resin reinforcement member is disposed on the outer side of the plate member in the vehicle width direction and bonded to the side sill. The reinforcement is an outer protrusion that is bonded to at least one of the inner peripheral surfaces of the outer wall, upper wall, and lower wall of the side sill via an adhesive that hardens when heated; An inner protrusion protruding toward the plate member, A plurality of protruding portions are provided on one of the reinforcement member and the plate member, and a plurality of inserted portions into which the protruding portions are inserted are provided on the other of the reinforcement member and the plate member. The protruding portion or the inserted portion is formed on an inner end of the inner protrusion, The protruding portion and the inserted portion are A side sill structure, characterized in that the adhesive is disposed at a position spaced away from the center of the closed cross section of the side sill.

2. The insertion portion is formed on the plate member so as to face the inner protrusion, 2. The side sill structure according to claim 1, wherein the plate member includes a tubular portion extending in the vehicle width direction from an edge of the insertion portion.

3. 3. The side sill structure according to claim 2, wherein the protrusion is formed of a solid body that fits inside the cylindrical portion.

4. The side sill structure according to claim 2 , wherein the protrusion is formed of a cylindrical body that fits inside the cylindrical portion.

5. The outer convex portion and the inner convex portion of the reinforcement are formed of fiber reinforced resin, The side sill structure according to claim 1, wherein the protruding portion of the reinforcement is formed of a fiber-free resin.

6. A side sill extending in a front-rear direction of the vehicle on an outer side in a vehicle width direction of the vehicle; A plate member that divides at least a portion of a cross section of the side sill in a vehicle width direction; A resin reinforcement member is disposed on the outer side of the plate member in the vehicle width direction and bonded to the side sill. A plurality of protruding portions are provided on one of the reinforcement member and the plate member, and a plurality of inserted portions into which the protruding portions are inserted are provided on the other of the reinforcement member and the plate member. a side sill structure characterized in that the inserted portion is formed with an elongated hole whose longitudinal length is longer than the length of the side sill in a direction perpendicular to the longitudinal direction, and the outer shape of the protruding portion is formed so that the longitudinal length of the side sill is longer than the length of the side sill in the direction perpendicular to the longitudinal direction, and at least a portion of the protruding portion and the inserted portion are spaced apart.

7. 2. The side sill structure according to claim 1, wherein the plate member is disposed immediately below a pillar extending upward from the side sill.

8. 2. The side sill structure according to claim 1, wherein the side sill includes a plurality of bulkheads spaced apart from each other in a longitudinal direction of the side sill within a cross section located on an inner side in a vehicle width direction from the plate member.

Images