JP4612464B2 - Mounting structure for storage housing at the rear of the vehicle - Google Patents

Description

  The present invention relates to a mounting structure for a storage case at the rear of a vehicle.

  In the rear part of the vehicle shown in FIG. 6, an article storage part 51 having a concave space is usually formed mainly for storing spare tires. FIG. 7 is an external perspective view of the surroundings of the conventional article storage section 51. In this figure, the storage casing 52 constituting the casing of the article storage section 51 is made of a steel plate, and is respectively provided on the front and both sides of the storage casing 52. The cross member 53 and the rear side frame 54 that are positioned are joined by welding in a suspended manner.

FIG. 8 is a cross-sectional view taken along the line DD in FIG. 7, and the conventional mounting structure of the storage housing 52 to the rear side frame 54 is a U-shaped main body 54a having an upper opening and both upper ends of the main body 54a. An upper edge portion 52c of the housing 52 is mounted on the rear side frame 54 having a so-called hat shape, which is formed integrally with the flange portion 54b, and is attached by spot welding via the flange portion 54b. That's it. The mounting structure on the cross member 53 side is the same as this. Patent Document 1 discloses a technique for attaching a seat to a floor via a cross member as a seat attachment structure.
JP 2003-291859 A

  The mounting structure is a mode in which the upper edge portion 52c of the housing case 52 is spot-welded to the upper side of the rear side frame 54. Therefore, the flange portion 54b extending horizontally on the rear side frame 54 side is required. . Therefore, in this mounting structure, the main body portion 54a of the rear side frame 54 and the wall surface portion 52b of the storage housing 52 are separated by the flange portion 54b interposed therebetween. When the installation position is determined, it can be said that the presence of the flange portion 54b can be a part that can hinder the storage space of the article storage portion 51 in the lateral direction. Of course, the same can be said for the cross member 53 shown in FIG.

  FIG. 9 is an explanatory cross-sectional view around the bottom surface portion 52 a of the storage housing 52. The bottom surface portion 52a is a part exposed to the outside of the vehicle. In this figure, when a reinforcing cross member 55 is stretched over the left and right rear side frames 54 (FIG. 7) so as to support the bottom surface portion 52a of the storage housing 52 (both ends of the reinforcing cross member 55 are shown in FIG. Although not shown, it is bent upward and is connected to the left and right rear side frames 54). Conventionally, the traveling wind interferes with the reinforcing cross member 55, and the airflow is swirled in the space behind the reinforcing cross member 55. There is a risk that the aerodynamic characteristics of the vehicle may be deteriorated.

  The present invention was devised to solve the above-described problems, and has a storage housing mounting structure at the rear of the vehicle that can take a large storage space for the article storage portion and reduce the influence on the aerodynamic characteristics of the vehicle. The purpose is to provide.

In order to solve the above-mentioned problems, the present invention is located at the vehicle rear side and at the left and right at the rear of the vehicle with respect to at least one of a cross member extending in the vehicle width direction and a rear side frame extending in the vehicle front-rear direction. A mounting structure for attaching and attaching a housing case for storing articles formed in a concave shape having a wall surface portion and a bottom surface portion comprising three surfaces , wherein the wall surface of the housing case is attached. Are joined to the side of the cross member or the rear side frame by welding , and the wall surface portion near the vehicle front and the bottom surface portion are formed of separate members, and the lower edge of the wall surface portion near the vehicle front is Bend backward and join to the front edge of the bottom surface, and support the outside of the bottom surface of the storage case behind the joint between the lower edge of the wall surface near the front of the vehicle and the front edge of the bottom surface Left and right A reinforcing cross member is spanned between the arranged rear side frames, welded to the housing case, and the bottom portion of the housing case is the same as the bottom portion of the reinforcing cross member at a rear position close to the reinforcing cross member. The storage housing mounting structure in the rear portion of the vehicle is characterized in that a recess is formed in the bottom surface of the storage housing so as to be at a certain height .

According to this mounting structure, by providing the welded portion extending downward along the wall surface portion of the storage housing on the cross member or rear side frame side, the wall surface portion of the storage housing is connected to the side portion of the cross member or rear side frame. Can be attached to. Therefore, unlike the conventional case, there is no problem that a horizontal flange portion formed on the cross member or the rear side frame is interposed therebetween, and the position of the wall surface portion can be brought closer to the cross member or the rear side frame. .
Moreover, according to this attachment structure, even if the storage casing to be suspended is formed deep, the rigidity of the storage casing can be increased by the reinforcing cross member.
Furthermore, according to this attachment structure, the traveling wind that has passed under the reinforcing cross member flows smoothly rearward along the bottom surface. Therefore, the occurrence of turbulence of the airflow in the space behind the reinforcing cross member is reduced, and the deterioration of the aerodynamic characteristics of the vehicle can be suppressed.

  Further, according to the present invention, the cross member or the rear side frame is positioned horizontally, and has a side portion that forms a first flange portion that extends downward along the wall surface portion of the storage housing, and a vertical shape. It is made of a frame material having a substantially L-shaped cross section, which is located and is formed of a second flange portion extending in the lateral direction and having a second flange portion. An upper edge that extends to the wall, and a hollow closed cross-section is formed by the frame material and the wall and upper edge of the storage housing. The structure is such that the parts are joined to the first flange part and the second flange part of the frame material by welding, respectively.

  According to this mounting structure, the rigidity of the cross member or the rear side frame, in particular, the torsional rigidity is increased by the presence of the hollow closed cross section, and the hollow closed cross section using only the housing for the cross member or the rear side frame. Since the portion can be formed, it is not necessary to separately provide a dedicated member for ensuring rigidity, and the number of parts can be reduced and the number of assembling steps can be simplified.

  According to the present invention, the storage space for the article storage portion at the rear of the vehicle can be widened, and the indoor merchandise of the vehicle is improved.

  FIG. 1 is an external perspective view of the periphery of an article storage unit 1 formed at the rear of the vehicle. The article storage unit 1 is formed as a concave space that mainly stores spare tires as articles, and the basic configuration of the storage casing 2 serving as the casing is composed of a bottom surface portion 2a on which articles are placed and a bottom surface portion 2a. It consists of a wall surface portion 2b rising from the edge. The bottom surface portion 2a and the wall surface portion 2b may be integrally formed, or may be a relationship formed as a separate member. In addition, a partition plate, a carpet, and the like (not shown) are horizontally disposed above the article storage unit 1, and the upper space functions as a trunk for storing passenger luggage and the like.

  Reference numeral 3 denotes a cross member extending in the vehicle width direction, reference numeral 4 denotes a pair of left and right rear side frames extending in the vehicle front-rear direction, and the cross member 3 is fixed so as to be spanned between the left and right rear side frames 4. Established. In other words, the cross member 3 and the left and right rear side frames 4 constitute a U-shaped frame member in plan view with the vehicle rear side opened around the article storage unit 1. Therefore, the storage housing 2 is attached as a housing having a bottom surface portion 2a having a rectangular shape in plan view and a wall surface portion 2b having three surfaces, and is suspended from the cross member 3 and the rear side frame 4.

  Conventionally, as shown in FIG. 7, the housing 52 is spot-welded at the top of the cross member 53 and the rear side frame 54, whereas the present invention is housed as shown in FIG. 1. The main feature is that the wall surface 2b of the housing 2 is attached to the side of the cross member 3 and the rear side frame 4 by welding. This eliminates the problem that the horizontally extending flange portion 54b is interposed therebetween as shown in FIG. 8, and accordingly the position of the wall surface portion 2b in FIG. 1 is set to the cross member 3 or rear side frame 4 side. Can be sent to. That is, the storage space in the horizontal direction of the article storage unit 1 can be expanded. In addition, the attachment structure of this invention is not restricted to the case where it applies to both the cross member 3 and the rear side frame 4, If it is applied to at least one, it is included by this invention.

  2 and 3 are an AA sectional view and a BB sectional view in FIG. 1, respectively. The mounting structure of the present invention in which the wall surface portion 2b of the housing 2 is joined to the side portions of the cross member 3 and the rear side frame 4 by welding (spot welding) is provided on the wall surface portion 2b on the cross member 3 and rear side frame 4 side. A welded portion extending along the structure is required. Therefore, in the present embodiment, as shown in FIG. 2, as the cross member 3, one side formed with a first flange portion 3 c that is positioned horizontally and extends downward along the wall surface portion 2 b of the storage housing 2. It is composed of a frame material having a substantially L-shaped cross section consisting of a portion 3a and another side portion 3b that forms a second flange portion 3d that is positioned vertically and extends laterally away from the wall surface portion 2b. The first flange portion 3c is used for the welded portion. Further, as shown in FIG. 3, the rear side frame 4 also has a side portion 4 a that is positioned horizontally and that forms a first flange portion 4 c that extends downward along the wall surface portion 2 b of the storage housing 2. The first flange comprises a frame material having a substantially L-shaped cross section, which is formed in a vertical shape and includes a second side portion 4b formed with a second flange portion 4d extending laterally away from the wall surface portion 2b. The portion 4c is used for the welded portion.

  The cross member 3 and the rear side frame 4 are required to be members having high rigidity. However, when the frame member has a substantially L-shaped cross section as described above, the torsional rigidity may decrease particularly when the frame is used alone. Therefore, the present invention forms an upper edge 2c extending outward in the horizontal direction at the upper end of the wall surface 2b of the housing 2 as shown in FIG. The wall surface portion 2b is brought into contact with the first flange portion 3c of the cross member 3 so as to form the hollow closed cross-section portion 5 by the wall surface portion 2b and the upper edge portion 2c. 2c is brought into contact with the second flange portion 3d and joined by spot welding. Therefore, the rigidity of the cross member 3, particularly the torsional rigidity, is enhanced by the presence of the hollow closed cross section 5. According to this mounting structure, an increase in weight can be suppressed as compared with a method in which the thickness of the cross member 3 is increased to ensure rigidity. In addition, since the hollow closed cross-section 5 is formed with respect to the cross member 3 by using only the housing 2, there is no need to separately provide a dedicated member for ensuring rigidity, and the number of parts can be reduced. Assembling man-hours can be simplified.

  In the present embodiment, the rear side frame 4 side has a structure in which a reinforcing member 6 having a substantially L-shaped cross section is welded to the rear side frame 4 so as to form a hollow closed cross section 5 in advance as shown in FIG. However, the mounting structure on the cross member 3 side can also be applied to the rear side frame 4 side.

  Next, the present invention will be described with respect to the problem of rigidity of the storage housing 2 and the problem of air current disturbance. In FIG. 1, a reinforcing cross member 7 is stretched between the left and right rear side frames 4 so as to bypass the storage housing 2 downward, and the bottom surface portion 2 a of the storage housing 2 is formed on the reinforcing cross member 7. Spot-welded in the form of being placed on. Since the housing case 2 has a structure that is suspended from the cross member 3 and the rear side frame 4, if the housing case 2 is formed deeply, there is a risk of insufficient rigidity. Therefore, as in the present invention, the rigidity of the housing 2 can be ensured by joining the reinforcing cross member 7 to the bottom surface 2a and the wall 2b of the housing 2 by welding.

  FIG. 4 is a cross-sectional explanatory view around the bottom surface portion 2 a of the storage housing 2. A local recess 8 is formed in the bottom surface portion 2 a so that the bottom surface portion 2 a is at the same height as the bottom portion of the reinforcing cross member 7 at a rear position close to the reinforcing cross member 7. The concave portion 8 is secured as a space for storing small items mainly used in an emergency, such as a triangular display plate, a jack, and a tool.

  In this way, at the rear position close to the reinforcing cross member 7, the concave portion 8 is formed in the bottom surface portion 2 a, and the bottom surface portion 2 a is adjusted to the same height as the bottom portion of the reinforcing cross member 7. The traveling wind that has passed under the reinforcing cross member 7 smoothly flows rearward as it is along the bottom surface portion 2a. Therefore, the occurrence of turbulence of airflow in the space behind the reinforcing cross member 7 is reduced, and the deterioration of the aerodynamic characteristics of the vehicle can be suppressed. Further, the vehicle travels through the bottom surface portion 2a by aligning the rear end of the bottom surface portion 2a and the lower end of the rear bumper 9 so that the bottom surface portion 2a and the lower surface of the rear bumper 9 of the vehicle indicated by phantom lines are smoothly connected. Wind can flow smoothly to the rear of the vehicle.

  In the case of FIG. 4, since a frame material having a hat-shaped cross section is used as the reinforcing cross member 7, the flange of the reinforcing cross member 7 is interposed between the bottom portion of the reinforcing cross member 7 and the bottom surface portion 2 a positioned rearward. Some space will be formed as much as there are parts. However, if the distance in the vehicle front-rear direction is also short in this space, most of the traveling wind flows as it is along the bottom surface portion 2a, and the airflow flowing into this space is slight. Therefore, the problem of air turbulence does not occur so much.

  FIG. 5 is a view showing a modified example of FIG. 4, and shows a case where the reinforcing cross member 7 is a frame material having a substantially L-shaped cross section and one side thereof is spot welded to the bottom 2a located rearward. . According to this, since there is no space between the reinforcing cross member 7 and the bottom portion 2a of the storage housing 2 located at the rear, all the traveling wind passing below the reinforcing cross member 7 is the bottom portion. Smoothly flows backward along 2a. Therefore, the problem of turbulence in the airflow is further solved, and a decrease in the aerodynamic characteristics of the vehicle is suppressed.

  Next, the problem of the shape of the storage housing 2 will be described. Conventionally, the storage housing 52 shown in FIG. 7 has a wall surface portion and a bottom surface portion that are integrally formed by drawing. There is a problem in that the R shape (curvature radius) of the corner of the corner increases, and the storage space decreases accordingly. In addition, because of the drawing process, the space shape of the article storage unit 51 is naturally limited to a substantially inverted frustoconical shape, and there is a problem that it is difficult to deal with a square-shaped article larger than the spare tire. On the other hand, as shown in FIG. 2, if the bottom surface portion 2a and the wall surface portion 2b are formed of separate members, the end portions of both can be connected in a substantially orthogonal shape, so that an R shape is obtained. Accordingly, the corner space between the wall surface portion 2b and the bottom surface portion 2a is widened, and the storage space of the entire article storage portion 1 is widened. Moreover, since the space shape of the article storage unit 1 can be formed into a flat, substantially rectangular parallelepiped shape, an article having a square shape larger than the spare tire can be stored.

  The preferred embodiments of the present invention have been described above. As described above, the mounting structure of the storage housing 2 according to the present invention is included in the present invention as long as it is applied to either the cross member 3 or the rear side frame 4. Moreover, the cross-sectional shape of the cross member 3 and the rear side frame 4 is not limited to a substantially L shape depending on circumstances.

It is explanatory drawing of this invention, and is an external appearance perspective view around the goods storage part formed in the vehicle rear part. It is AA sectional drawing in FIG. It is BB sectional drawing in FIG. It is explanatory drawing of this invention, and is sectional explanatory drawing around the bottom face part of a storage housing | casing. It is explanatory drawing of this invention, and is sectional explanatory drawing which showed the modification with respect to FIG. It is side surface explanatory drawing of the vehicle which shows the layout of the articles | goods storage part in a vehicle rear part. It is an external appearance perspective view around the conventional article storage part. It is DD sectional drawing in FIG. It is sectional explanatory drawing which shows the surroundings of the bottom face part of the conventional storage housing | casing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Article storage part 2 Storage housing | casing 2a Bottom face part 2b Wall surface part 2c Upper edge part 3 Cross member 3a One side part 3b Other side part 3c 1st flange part 3d 2nd flange part 4 Rear side frame 5 Hollow closed cross-section part 7 Reinforcement cross member 8 recess

Claims (2)

In the rear part of the vehicle, a wall surface part and a bottom part composed of three surfaces positioned on the front side and the left and right sides of the vehicle with respect to at least one of the cross member extending in the vehicle width direction and the rear side frame extending in the vehicle longitudinal direction. It has an attachment structure that is attached by welding so as to hang down a storage housing for storing articles that is formed in a concave shape,
Joining the wall surface of the housing to the side of the cross member or rear side frame by welding ,
The wall surface portion near the vehicle front and the bottom surface portion are formed of separate members, and the lower edge of the wall surface portion near the vehicle front is bent to the rear of the vehicle and joined to the front edge of the bottom surface portion.
Reinforced between the rear side frames arranged on the left and right sides so as to support the outside of the bottom surface portion of the storage housing at the rear of the joint portion between the lower edge of the wall portion near the front of the vehicle and the front edge of the bottom surface portion. Cross the cross member, weld it to the storage case,
A concave portion is formed on the bottom surface of the storage housing so that the bottom surface of the storage housing is at a height level comparable to the bottom of the reinforcement cross member at a rear position close to the reinforcement cross member. The mounting structure of the storage housing | casing in the vehicle rear part characterized by these. The cross member or the rear side frame is positioned horizontally and has one side portion forming a first flange portion extending downward along the wall surface portion of the storage housing, and is positioned vertically and laterally. It is made of a frame material having a substantially L-shaped cross section consisting of the other side portion forming the extended second flange portion, and extends upward in the horizontal direction at the upper end of the wall surface portion of the storage housing. An edge is formed,
The wall surface portion and the upper edge portion of the storage housing are respectively connected to the first flange portion of the frame material and the frame material so that a hollow closed cross section is formed by the frame material and the wall surface portion and the upper edge portion of the storage housing. The structure for attaching a storage housing in a vehicle rear portion according to claim 1, wherein the second flange portion is joined to the second flange portion by welding.

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