JP2010036696A - Reinforcing structure of hollow structure - Google Patents

Abstract

An object of the present invention is to improve the strength and rigidity of a hollow structure while making it possible to disperse stress generated in the hollow structure and suppressing the amount of foaming members to be used.
SOLUTION: Reinforcement 16 is fixed in a closed cross section 22 in a hollow structure 14, and both end portions 16A are arranged at corners 30 of the closed cross section 22. A gap 36 is provided between the floor panel 26 (wall portion) constituting the corner portion 30 and both end portions 16 </ b> A of the reinforcement 16. In the closed cross section 22, a resin reinforcing member 18 having an open cross section 28 opened at least on the reinforcement 16 side is disposed. The opening edge 18 </ b> A is also arranged at the corner 30 of the closed section 22. A foam member 20 is provided at least between the reinforcing member 18 and the hollow structure 14 in the closed cross section 22. The foamed member 20 is heated and foamed, enters the gap 36 and solidifies.
[Selection] Figure 7

Description

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

A hollow structure having a reinforcing body in a hollow chamber of the hollow structure, wherein the reinforcing body includes a beam portion formed on an inner wall surface on an acting side of an external force acting on the hollow structure, and an external force from the beam portion. An apparatus is disclosed that includes a plurality of column portions that extend in the action direction and are provided across the opposing inner wall surface on the side facing the inner wall surface on the external force acting side (see Patent Document 1).
JP 2002-274427 A JP 2003-40138 A JP 2001-199362 A JP-A-10-53156

  However, in the conventional example described in Patent Document 1 described above, the reinforcing body has an open cross-sectional structure in which an opening is provided on the bottom surface side of the inner panel constituting the hollow structure, and the opening in the reinforcing body Since the edge on the side is in contact with the bottom surface of the inner panel at the corner of the hollow chamber, the foam does not enter between the edge and the bottom surface. In other words, at the corner of the hollow chamber, the edge of the reinforcing body and the bottom surface of the inner panel are not joined by the foam. If an attempt is made to insert the foam into this part, the foam will penetrate into the space surrounded by the bottom surface of the inner panel and the reinforcing body and foam, so a large amount of foam is required. It is considered to be.

  In consideration of the above facts, the present invention allows the foamed member to enter between the edge of the reinforcing member in the closed cross section of the hollow structure and the corner of the closed cross section, thereby connecting to the hollow structure. An object of the present invention is to improve the strength and rigidity of the hollow structure while allowing the generated stress to be dispersed and suppressing the amount of the foaming member to be used.

  The invention according to claim 1 is a hollow structure having a polygonal closed cross section, and is fixed within the closed cross section of the hollow structure, and both end portions are arranged at corners of the closed cross section, and the corner A reinforcement provided with a gap between the wall portion constituting the portion and the both end portions, and an open cross section disposed in the closed cross section of the hollow structure body and opening at least on the reinforcement side An opening-side edge is disposed at the corner where the both end portions of the reinforcement are located, and the reinforcement member made of resin whose opening side of the open section is covered by the reinforcement, and at least in the closed section The reinforcing member is provided between the reinforcing member and the hollow structure, is heated and foamed, enters between the reinforcing member and the hollow structure into the gap, and is solidified. And a, a foam member that binds to the closed plane in the body.

  In the reinforcing structure for a hollow structure according to claim 1, the reinforcement is fixed in the closed section of the hollow structure having a polygonal closed section, and both ends thereof are arranged at the corners of the closed section. . A gap is provided between the wall portion constituting the corner of the closed cross section of the hollow structure and both ends of the reinforcement. Further, in the closed cross section of the hollow structure, a resin reinforcing member having an open cross section opened at least on the reinforcement side is disposed. The edge on the opening side is arranged at the corner of the closed cross section where both ends of the reinforcement are located, and the open side of the open cross section of the reinforcing member is covered by the reinforcement. A foam member is provided at least between the reinforcing member and the hollow structure in the reinforcement closed cross section. This foamed member is heated and foamed, and solidifies by entering from the space between the reinforcing member and the hollow structure to the gap between the wall portion constituting the corner of the closed section and both ends of the reinforcement. Thereby, the reinforcing member is coupled within the closed cross section of the hollow structure. By covering the opening side of the open cross section of the reinforcing member with reinforcement, when the foam member is foamed, the foam member is placed between the end portions of the reinforcement and the wall portion constituting the corner of the closed cross section. Can lead to the gap. Thereby, it can suppress that a foaming member enters into the open cross section of this reinforcement member from the edge by the side of the opening of a reinforcement member, and can suppress the quantity of the foam member to be used. In addition, the foamed member is inserted between the edge of the reinforcing member in the closed cross section of the hollow structure and the corner of the closed cross section, and the stress generated in the hollow structure can be dispersed. The strength and rigidity of the structure can be improved.

  According to a second aspect of the present invention, in the reinforcing structure for a hollow structure according to the first aspect, the both end portions of the reinforcement are arranged so as to overlap the end edges of the reinforcing member, and a gap between the end edges is provided. However, it is narrower than the gap between the reinforcing member and the hollow structure at the edge.

  In the reinforcing structure for a hollow structure according to claim 2, both ends of the reinforcement are arranged so as to overlap with the end edge of the reinforcing member, and a gap between the end edge and the reinforcing member at the end edge and the hollow Since it is narrower than the gap with the structure, it is further suppressed that the foaming member enters the inside of the open section of the reinforcing member from the edge on the opening side of the reinforcing member when the foaming member foams. The Thereby, a foaming member can enter efficiently into the clearance gap between the wall part which comprises the corner part of a closed cross section, and the both ends of a reinforcement at the time of foaming. For this reason, the usage-amount of a foaming member can be reduced further.

  According to a third aspect of the present invention, in the reinforcing structure for a hollow structure according to the first or second aspect, the closed cross section of the hollow structure is coupled to a vehicle floor panel and a vehicle lower side of the floor panel. And the reinforcing member is provided at the bent portion of the side member.

  In the reinforcing structure for a hollow structure according to claim 3, the closed cross section of the hollow structure is formed by a vehicle floor panel and a side member coupled to the vehicle lower side of the floor panel and extending in the vehicle front-rear direction. Since the reinforcing member is provided at the bent portion of the side member, the strength and rigidity of the bent portion when the collision load is input to the side member can be improved.

  As described above, according to the reinforcing structure for a hollow structure according to claim 1 of the present invention, between the edge of the reinforcing member and the corner of the closed section in the closed section of the hollow structure. By inserting and bonding the foam member, the stress generated in the hollow structure can be dispersed, and the strength and rigidity of the hollow structure can be improved while suppressing the amount of the foam member to be used. An excellent effect is obtained.

  According to the reinforcing structure for a hollow structure according to claim 2, an excellent effect that the amount of the foamed member used can be further reduced can be obtained.

  According to the hollow structure reinforcing structure of the third aspect, it is possible to obtain an excellent effect that the strength and rigidity of the bent portion can be improved when a collision load is input to the side member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, the hollow structure reinforcing structure S according to the present embodiment relates to a reinforcing structure in the bent portion 12 of the side member 10, and in FIG. 2, the hollow structure 14, the reinforcement 16, and a resin-made structure. The reinforcing member 18 and the foaming member 20 are included.

  2 and 3, the hollow structure 14 is a vehicle skeleton member having a substantially rectangular closed section 22 as an example of a polygon. The closed cross section 22 of the hollow structure 14 is formed by a floor panel 26 of the vehicle 24 (FIG. 1) and a side member 10 coupled to the vehicle lower side of the floor panel 26 and extending in the vehicle front-rear direction. The side member 10 is formed in, for example, an inverted hat shape in cross section, and is joined to the lower surface of the floor panel 26 in the upper flange 10B, for example, by welding.

  2 and 3, the reinforcement 16 is, for example, a press-formed product of a high-strength steel plate, and is fixed in a closed cross section 22 in the hollow structure 14. Both ends 16 </ b> A of the reinforcement 16 are arranged at the corners 30 of the closed cross section 22. A gap 36 is provided between the floor panel 26, which is an example of a wall portion constituting the corner portion 30, the side wall portion 10 </ b> A of the side member 10, and the both end portions 16 </ b> A. Specifically, the reinforcement 16 is joined to the floor panel 26 at the base portion 16B. As the joining means, for example, welding is used. Both end portions 16A of the reinforcement 16 are provided at both ends of the base portion 16B in the vehicle width direction, for example, and are spaced apart from the floor panel 26 and the side wall portions 10A of the side members 10.

  2 and 3, the resin reinforcing member 18 is disposed in the closed cross section 22 of the hollow structure 14, has an open cross section 28 that opens at least toward the reinforcement 16, and both end portions of the reinforcement 16. An edge 18A on the opening side is arranged at the corner 30 where 16A is located, and the opening side of the open section 28 is covered with the reinforcement 16. The reinforcing member 18 is provided, for example, in the bent portion 12 (FIG. 1) on the front side of the side member 10. In addition, although the opening side of the open cross section 28 shall be covered by the reinforcement 16, this is not limited to the structure by which this opening side is completely covered by the reinforcement 16. Therefore, for example, in the open section 28 of the reinforcing member 18, a region where the foaming member 20 does not enter at the time of foaming may not necessarily be covered by the reinforcement 16. Further, as will be described later, a necessary minimum gap in consideration of variations in assembling of each member is allowed.

  Here, the side member 10 includes a front side member 10F and a rear side member 10R before and after the central portion 10C in the vehicle longitudinal direction. Both the front side member 10F and the rear side member 10R are located on the vehicle upper side with respect to the central portion 10C. Accordingly, the boundary between the central portion 10C and the front side member 10F and the boundary between the central portion 10C and the rear side member 10R are formed as bent portions 12 and 13, respectively. The front bent portion 12 is a so-called kick portion. Wheels 15 are arranged outside the front side member 10F and the rear side member 10R in the vehicle width direction. The lower end portion of the A pillar 17 is coupled to the upper portion of the front bent portion 12. Further, the rear end portion of the apron upper member 19 extending in the vehicle front-rear direction is coupled to the A pillar 17.

  As shown in FIG. 2, in the present embodiment, both end portions 16A of the reinforcement 16 are disposed so as to overlap the edge 18A of the reinforcing member in the vehicle width direction in a predetermined range in the vehicle vertical direction, for example. The gap 31 with the edge 18A is narrower than the gap (such as the gap 36) between the reinforcing member 18 and the hollow structure 14 at the edge 18A. Specifically, the edge 16C on both sides in the vehicle width direction at both ends 16A of the reinforcement 16 is bent to the vehicle lower side along the edge 18A of the reinforcing member 18, and the reinforcing member in the closed cross section 22 is formed. It arrange | positions so that it may overlap with the inner side of 18 edge 18A. In other words, the end edge 18 </ b> A of the reinforcing member 18 is disposed in the gap 36 between the end edge 16 </ b> C of the both ends 16 </ b> A of the reinforcement 16 and the side wall 10 </ b> A of the side member 10. The edge 18A of the reinforcing member 18 is separated from the floor panel 26 in the vehicle vertical direction, and a gap 36 is also formed therebetween. In addition, the gap 31 between the end edge 18A of the reinforcing member 18 and both end portions 16A of the reinforcement 16 is larger than the gap between the reinforcing member 18 and the hollow structure 14 at the end edge 18A (such as the gap 36). It is narrowed. Note that the size of the gap 31 is the minimum necessary in consideration of variations in assembling each member.

  As shown in FIGS. 4 and 5, the resin reinforcing member 18 is formed in, for example, a substantially W-shaped cross section, and has an open cross section 28 opened on the vehicle upper side (reinforcement 16 side) and the vehicle lower side. It has an open section 29 that is open to the side wall 10 on the side of the lower wall portion 10D. The reinforcing member 18 has side wall portions 18B on both sides in the vehicle width direction each having an end edge 18A, and a pair of side wall portions 18C disposed between the end edges 18A on both sides.

  The upper edges of the side wall portion 18C are connected in the vehicle width direction by the upper wall portion 18D. The upper wall portion 18D is disposed apart from the base portion 16B of the reinforcement 16, and is formed to be narrower than the base portion 16B. Lower edges of 18B and 18C adjacent to each other in the vehicle width direction are connected to each other in the vehicle width direction by a lower wall portion 18E. The open section 29 is formed at the center of the reinforcing member 18 in the vehicle width direction, and the open section 28 is formed on both sides of the open section 29 in the vehicle width direction. In consideration of the die-cutting property when the reinforcing member 18 is molded, the interval between the side wall 18B and the side wall 18C is set so as to increase in the opening direction of the open cross sections 28 and 29, respectively.

  Ribs 38 are provided in the open cross sections 28 on both sides of the reinforcing member 18 in the vehicle width direction. The ribs 38 are arranged at predetermined intervals along the longitudinal direction of the reinforcing member 18 and are connected to the side wall portion 18B, the lower wall portion 18E, and the side wall portion 18C, respectively. A rib 39 is also provided in the open section 29 of the reinforcing member 18. The ribs 39 are arranged at predetermined intervals along the longitudinal direction of the reinforcing member 18 so as to be in phase with, for example, the open cross section 28, and are connected to the side wall 18C and the upper wall 18D on both sides, respectively.

  2 and 3, the foaming member 20 is provided between at least the reinforcing member 18 and the hollow structure 14 in the closed cross-section 22, is heated and foamed, and the reinforcing member 18 and the hollow structure 14. The reinforcing member 18 is coupled into the closed cross section 22 of the hollow structure 14 by entering the space 36 and solidifying it.

  In this embodiment, as shown in FIGS. 2 to 5, between the side wall portion 18 </ b> B of the reinforcing member 18 and the side wall portion 10 </ b> A of the side member 10, and below the lower wall portion 18 </ b> E of the reinforcing member 18 and the side member 10. A foam member 20 is provided between the wall 10D. The foam member 20 is arranged, for example, in a substantially L-shaped cross section so as to follow the side wall portion 18B and the lower wall portion 18E. Further, a sheet-like foam member 20 is provided between the upper wall portion 18D of the reinforcing member 18 and the base portion 16B of the reinforcement 16. In addition, as for the shape of each foaming member 20 here, all are the things before foaming. As shown in FIGS. 4 and 5, each foam member 20 is provided, for example, continuously along the longitudinal direction of the reinforcing member 18. The foam member 20 may be provided intermittently along the longitudinal direction of the reinforcing member 18.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. First, manufacture of the reinforcement structure S of a hollow structure is demonstrated. As shown in FIG. 5, the reinforcement 16 is fixed to the floor panel 26 in advance. The hollow structure 14 is configured by connecting the side member 10 to the lower surface of the floor panel 26, and a closed section 22 is formed. In the closed cross section 22, the hollow structure 14 and the foam member 20 are disposed. As shown in FIGS. 2 to 5, the reinforcing member 18 is temporarily fastened in the closed section 22 of the hollow structure 14 by a stopper (not shown) such as a clip.

  The foam member 20 is provided at least between the reinforcing member 18 and the hollow structure 14 in the closed cross section 22. Specifically, the side wall portion is provided between the side wall portion 18B of the reinforcing member 18 and the side wall portion 10A of the side member 10 and between the lower wall portion 18E of the reinforcing member 18 and the lower wall portion 10D of the side member 10. A foam member 20 having a substantially L-shaped cross section along 18B and the lower wall portion 18E is provided. In addition, a sheet-like foam member 20 is provided between the upper wall portion 18 </ b> D of the reinforcing member 18 and the base portion 16 </ b> B of the reinforcement 16.

  As shown in FIG. 6, in the process of heating the hollow structure 14 such as a coating process, the foamed member 20 is heated and foamed, and solidified to a relatively high rigidity state by cooling, so that The structure 14 and the reinforcing member 18 are coupled. Specifically, the foamed member 20 having an L-shaped cross section increases its volume by foaming, and spreads between the reinforcing member 18 and the hollow structure 14. At this time, both ends 16A of the reinforcement 16 and the edge 18A on the opening side of the open section 28 of the reinforcing member 18 are arranged at the corners 30 of the closed section 22 where the both ends 16A of the reinforcement 16 are located, The opening of the open section 28 is covered by the reinforcement 16, and further, between the floor panel 26, which is an example of a wall part that forms the corner 30 of the closed section 22, and both ends 16 A of the reinforcement 16, Since the gap 36 is provided, the foam member 20 can enter the direction of the arrow A from between the side wall portion 18B of the reinforcing member 18 and the side wall portion 10A of the side member 10 to the gap 36. When the foamed member 20 is solidified, as shown in FIGS. 7 to 9, the edge 30A on the opening side of the open section 28 of the reinforcing member 18 has a corner 30 of the closed section 22 located on the opening side. Combined with

  At this time, since the opening side of the open section 28 in the reinforcing member 18 is covered with the reinforcement 16, the foam member 20 constitutes both ends 16 </ b> A of the reinforcement 16 and the corner 30 of the closed section 22. It can guide | invade to the clearance gap 36 between the floor panels 26 which are an example of a wall part. Further, the end edges 16C of the both end portions 16A of the reinforcement 16 are arranged so as to overlap the end edges 18A of the reinforcing member 18, and a gap 31 between the end edges 18A and the reinforcing portions 18 and the hollow structures at the end edges 18A. 14 when the foamed member 20 is foamed, the foamed member extends from the end edge 18A on the opening side of the reinforcing member 18 to the inside of the open section 28 of the reinforcing member 18. It is suppressed that 20 enters. Therefore, the foaming member 20 can efficiently enter the gap 36 between the floor panel 26 constituting the corner portion 30 of the closed section 22 and the both end portions 16A of the reinforcement 16 during foaming. For this reason, the usage-amount of the foaming member 20 can be reduced.

  On the other hand, the foamed member 20 having an L-shaped cross section is foamed and solidified, whereby the side wall portion 18B of the reinforcing member 18 and the side wall portion 10A of the side member 10 are coupled, and the lower wall portion 18E of the reinforcing member 18 and the side wall The lower wall portion 10D of the member 10 is coupled. Accordingly, as shown in FIGS. 7 and 8, the reinforcing member 18 is also coupled to the corner 40 on the vehicle lower side of the closed section 22. As a result, the reinforcing member 18 is coupled to the four corners (corner portions 30 and 40 on both sides) of the substantially rectangular closed section 22 in the hollow structure 14. Furthermore, when the sheet-like foam member 20 is foamed and solidified, the upper wall portion 18D of the reinforcement member 18 and the base portion 16B of the reinforcement 16 are coupled.

  Thus, in the present embodiment, the foam member 20 is inserted between the edge 18A of the reinforcing member 18 and the corner 30 of the closed cross section 22 in the closed cross section 22 of the hollow structure 14, and the reinforcing member 18 is inserted. By coupling to the four corners of the closed section 22, stress generated in the hollow structure 14 can be dispersed, and the strength and rigidity of the hollow structure 14 can be improved while suppressing the amount of the foaming member 20 to be used. it can.

  In particular, in this embodiment, since the reinforcing member 18 is provided in the bent portion 12 on the front side of the side member 10, the strength and rigidity of the bent portion 12 when the collision load is input to the side member 10 are improved. And deformation of the floor panel 26 can be suppressed.

  In addition, although the reinforcement structure S of the hollow structure body which concerns on this embodiment shall be the reinforcement structure in the bending part 12 of the front side of the side member 10, it is not restricted to this, The bending part 13 of the rear side of the side member 10 is used. It can also be applied to other hollow structures such as pillars (not shown).

  Moreover, although the shape of the closed cross section 22 is substantially rectangular, it is not limited thereto, and may be a polygon other than this. Furthermore, the cross-sectional shape of the reinforcing member 18 and the shape and arrangement of the ribs 38 and 39 are not limited to the above-described configuration and illustrated examples. Further, the sheet-like foam member 20 is provided between the upper wall portion 18D of the reinforcing member 18 and the base portion 16B of the reinforcement 16. However, the present invention is not limited to this, and the upper wall portion 18D and the base portion 16B are connected to the mastic. You may make it couple | bond using adhesives, such as.

It is a side view which shows a part of frame | skeleton of a vehicle. 2 to 5 are views showing a state before foaming of the foam member, and FIG. 2 is an enlarged cross-sectional view taken along the arrow 2-2 in FIG. 1 showing the reinforcing structure of the hollow structure. It is a partially broken perspective view which shows the reinforcement structure of a hollow structure. In the reinforcing structure of a hollow structure, it is a partially broken perspective view mainly showing a configuration of a reinforcing member and an arrangement of foamed members. It is a disassembled perspective view of the reinforcement structure of a hollow structure. It is an expanded sectional view which shows the state which a foaming member foams and penetrates between the both ends of a reinforcement and a floor panel. FIGS. 7 to 9 are views showing a state after foaming and solidification of the foam member, and FIG. 7 is an enlarged cross-sectional view taken along arrow 7-7 in FIG. 1 showing the reinforcing structure of the hollow structure. It is a partially broken perspective view which shows the reinforcement structure of a hollow structure. In the reinforcing structure of a hollow structure, it is a partially broken perspective view mainly showing a state of a foamed member.

Explanation of symbols

10 Side member 10A Side member side wall (wall)
DESCRIPTION OF SYMBOLS 12 Bending part 14 Hollow structure 16 Reinforcement 16A Both ends 18 Reinforcement member 18A End edge 20 Foaming member 22 Closed section 26 Floor panel (wall part)
28 Open section 30 Corner 31 Gap 36 Gap S Reinforcing structure of hollow structure

Claims (3)

A hollow structure having a polygonal closed cross-section; and
The hollow structure body is fixed within the closed cross section, and both end portions are disposed at the corners of the closed cross section, and a gap is provided between the wall portion constituting the corner portions and the both end portions. Reinforcement,
The hollow structure has an open cross section that is disposed within the closed cross section and that opens at least toward the reinforcement side, and an opening side edge is disposed at the corner where the both ends of the reinforcement are located. A reinforcement member made of resin in which the opening side of the open cross section is covered by the reinforcement,
Provided at least between the reinforcing member and the hollow structure in the closed cross section, heated and foamed, enters between the reinforcing member and the hollow structure and into the gap to solidify, and the reinforcement A foam member that couples a member within the closed cross-section of the hollow structure;
Reinforcing structure of hollow structure having   The both ends of the reinforcement are arranged so as to overlap the edge of the reinforcing member, and the gap between the edge is narrower than the gap between the reinforcing member and the hollow structure at the edge. The reinforcing structure for a hollow structure according to claim 1. The closed cross section of the hollow structure is formed by a vehicle floor panel and a side member coupled to the vehicle lower side of the floor panel and extending in the vehicle front-rear direction.
The reinforcing structure for a hollow structure according to claim 1, wherein the reinforcing member is provided at a bent portion of the side member.

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