JP6300065B2 - Lower anchorage structure for vehicles - Google Patents

Description

  The present invention relates to a lower anchorage structure for a vehicle for mounting a child seat on a rear seat of the vehicle.

  Some child seats are compatible with ISOFIX. ISOFIX is a mechanism that can be attached more reliably in order to prevent ambiguity of attachment that occurs when a child seat is fixed by a seat belt and accidents caused by incorrect attachment. In the structure for fixing a child seat corresponding to ISOFIX, a bracket is arranged on a vehicle body floor (for example, a rear floor panel), and a child seat connecting member is connected to the bracket.

  As a method of attaching the child seat fixing member to the vehicle body floor, for example, those disclosed in Patent Document 1 and Patent Document 2 are known. In Patent Document 1, when a child seat fixing member is mounted on a vehicle body floor, the child vehicle seat is fixed by being sandwiched between the vehicle body floor and a flat-plate bracket. In Patent Document 2, a child seat fixing member is sandwiched between two brackets. Furthermore, rigidity is improved by connecting the left and right fixing brackets.

JP 2009-001191 A JP 2009-280146 A

  In the mounting method as described above, since the input from the child seat to the vehicle body is received by the vehicle body floor, it is difficult to ensure rigidity. In order to ensure the rigidity, securing the rigidity by attaching the connecting member increases the number of parts.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vehicle lower anchorage that can reliably receive an input from a child seat to a vehicle body using a rigid cross member. Is to provide a structure.

In order to achieve the above object, a lower anchorage structure for a vehicle according to the present invention is provided for a vehicle provided on the vehicle side for attaching a connecting member on the child seat side when the child seat is mounted on a rear seat of the vehicle. In the structure of the lower anchorage, a cross member extending in the vehicle width direction is disposed on the vehicle lower side of the rear floor panel of the vehicle, and the lower anchorage includes a mounting bracket disposed on an upper portion of the rear floor panel, A floor mounting portion is provided around the mounting bracket, and a cross section in the vehicle front-rear direction of the mounting bracket is substantially triangular, and the bottom of the triangular shape is provided along the upper surface of the rear floor panel. The vehicle rear side is provided so as to incline below the vehicle as it goes rearward of the vehicle. An inclined surface including a side is formed, and a boss recessed downward in the vehicle is formed at a vehicle rear portion of the inclined surface, and a vehicle lower surface of the boss is joined to the upper surface of the rear floor panel, and the mounting bracket and The cross member is configured to join the mounting bracket, the rear floor panel, and the cross member at the same place in a state where the rear floor panel is sandwiched, and the lower anchorage is the connecting member of the child seat A child seat mounting member for connecting
The child seat mounting member is mounted along the vehicle rear side of the mounting bracket, and ridge lines sandwiched between the boss and the floor mounting portion are provided on both sides of the boss in the vehicle width direction. The child seat mounting member is fixed to the mounting bracket in a state in which the longitudinal direction of the linearly extending legs provided on the child seat mounting member is along the direction in which the ridge line extends.

  Further, in one aspect of the vehicle lower anchorage structure according to the present invention, a cross-section in the vehicle front-rear direction of the mounting bracket is substantially triangular, and the bottom of the triangular shape is provided along the upper surface of the rear floor panel. The rear side of the vehicle is provided so as to incline below the vehicle as it goes toward the rear of the vehicle, and the lower anchorage includes a child seat mounting member for connecting the connecting member of the child seat, and the child seat mounting The member is attached along the vehicle rear side of the attachment bracket.

  According to the present invention, the mounting rigidity is improved, and the input from the child seat to the vehicle body can be reliably received using the highly rigid cross member.

  Further, according to one aspect of the present invention, it is possible to increase the rigidity and strength of the mounting bracket by forming a substantially triangular closed section having high rigidity on the rear floor panel, and to increase the mounting rigidity of the child seat mounting member. Can be effectively increased.

  Moreover, according to one aspect of the present invention, the bead shape improves the surface rigidity of the mounting surface of the child seat mounting member. Thereby, it becomes possible to make a mounting bracket difficult to deform | transform with respect to the load from a child seat mounting member. Furthermore, since the contact area with the leg part of the child seat mounting member can be increased, the mounting strength and rigidity can be increased.

  Further, according to one aspect of the present invention, it is possible to improve the rigidity of the mounting surface of the mounting bracket by providing the boss. Furthermore, by arranging clear ridge lines on both sides of the mounting bracket in the vehicle width direction, input from the child seat can be reliably received and distributed to the vehicle body.

  In addition, according to one aspect of the present invention, the load input direction from the child seat matches the rigid ridge line direction, so that the deformation of the mounting bracket can be suppressed during the load, and the load can be efficiently distributed to the vehicle body. Can be done.

It is a perspective view showing roughly the state where the connecting member of the child seat was connected to lower anchorage concerning the present invention. It is a perspective view which shows the state in which the lower anchorage of FIG. 1 was attached to the rear floor panel. It is the perspective view which looked at the rear floor panel of FIG. 2 from the vehicle downward direction. It is an expansion perspective view which expands and shows the lower anchorage of FIG. It is AA arrow sectional drawing of FIG. It is the expansion perspective view which expanded further the lower anchorage of FIG. It is a perspective view when the lower anchorage of FIG. 6 is seen from the vehicle rear and upper direction.

  Hereinafter, an embodiment of a lower anchorage structure for a vehicle according to the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view schematically showing a state in which a connecting member 41 of a child seat 40 is connected to the lower anchorage 5 of the present embodiment. FIG. 2 is a perspective view showing a state where the lower anchorage 5 of FIG. 1 is attached to the rear floor panel 1.

  FIG. 4 is an enlarged perspective view showing the lower anchorage 5 of FIG. 2 in an enlarged manner. 5 is a cross-sectional view taken along the line AA in FIG. FIG. 6 is an enlarged perspective view in which the lower anchorage 5 of FIG. 4 is further enlarged. FIG. 7 is a perspective view of the lower anchorage 5 of FIG. 6 when viewed from the rear and above the vehicle.

  The lower anchorage 5 of the present embodiment is a member for mounting the child seat 40 on the rear seat 50 of the vehicle. This lower anchorage 5 satisfies the ISOFIX (Isofix) standard.

  Here, ISOFIX will be described. ISOFIX is a mechanism that can be mounted more securely in order to prevent ambiguity of attachment that occurs when the child seat 40 is fixed by a seat belt and accidents caused by incorrect attachment. As shown in FIG. 1, without using a seat belt, a child seat 40 is fixed to two brackets (lower anchorage 5) embedded in the lower part of a vehicle seat, and a belt called a top tether 45 is attached to the upper part. The top tether anchorage 46 is connected and tightened.

  The child seat 40 in this example is mounted on the rear seat 50 of the vehicle. It arrange | positions on the seat cushion 52, maintaining the state which contact | connected the seat back 51, and is fixed in this state.

  On the vehicle side, there are two lower anchorages 5 arranged in the lower anchorage 5 and a top tether anchorage 46 at the top. The child seat 40 also needs to be adapted to this mounting structure.

  The lower anchorage 5 is a member fixed to the floor surface (upper surface) of the rear floor panel 1 of the vehicle.

  Here, the rear floor panel 1 is a member constituting the bottom of the vehicle. A rear seat 50 is disposed above the rear floor panel 1 in the vehicle. The rear seat 50 can be mounted with the child seat 40 as described above (FIG. 1).

  A plate-like connecting member 41 is provided at the lower part of the child seat 40. The connecting member 41 is a member for connecting to the lower anchorage 5. The connection between the lower anchorage 5 and the connecting member 41 will be described later.

  As shown in FIGS. 2 and 3, the main floor panel 4 is disposed in front of the rear floor panel 1 in the vehicle, and a spare tire storage portion 9 is disposed in the rear of the rear floor panel 1 in the vehicle. A pair of side members 3 extending in the vehicle front-rear direction are arranged on both sides of the rear floor panel 1 in the vehicle width direction. A rear cross member 2 extending in the vehicle width direction is disposed at the vehicle lower portion of the rear floor panel 1. The side member 3 and the rear cross member 2 are members constituting a skeleton of the vehicle, and are members having high rigidity among the members constituting the vehicle.

  Hereinafter, the configuration of the lower anchorage 5 will be described. The lower anchorage 5 includes a child seat mounting member 20 and a mounting bracket 10.

  The child seat mounting member 20 is a metal member to which the connecting member 41 of the child seat 40 is detachably connected (engaged). As shown in FIG. 4, the child seed attachment portion 20 is a U-shaped hook as a whole and is fixed to the attachment bracket 10. Of the U-shape, the linearly extending leg portion 21 is fixed to the rear inclined surface 15 described later. The fixed state will be described later.

  The mounting bracket 10 includes a hook fixing portion 12 and a floor mounting portion 11.

  The floor mounting portion 11 is a portion for fixing to the upper surface of the rear floor panel 1. A welded portion that is welded to the rear floor panel 1 is provided at the vehicle lower portion of the floor mounting portion 11. As shown in FIG. 5, the welded portion includes a front welded portion 31 on the vehicle front side and a rear welded portion 32 on the vehicle rear side of the vehicle lower side surface of the floor mounting portion 11. A hook fixing portion 12 is disposed behind the front welding portion 31 in the vehicle. The rear welding portion 32 is provided on the lower surface of the boss 16 provided at the rear portion of the rear inclined surface 15 of the hook fixing portion 12. The hook fixing part 12 and the boss 16 will be described later.

  A rear cross member 2 is disposed at the vehicle lower portion of the rear floor panel 1 where the floor mounting portion 11 is disposed. It arrange | positions so that it may overlap in order of the front side welding part 31, the rear floor panel 1, and the rear cross member 2 toward the downward direction from the vehicle upper direction, and these will be in the state fastened together. Similarly, it arrange | positions so that the back side welding part 32, the rear floor panel 1, and the rear cross member 2 may overlap in order, and these will be in the state fastened together.

  As shown in FIGS. 4 to 7, the hook fixing portion 12 is a portion to which the child seat mounting member 20 is fixed, and protrudes upward from the vehicle with respect to the floor mounting portion 11. The cross section in the vehicle front-rear direction of the hook fixing portion 12 is substantially triangular when viewed in the vehicle width direction (FIG. 5). The triangle is provided so that the bottom is along the surface of the rear floor panel 1. Of the sides above the bottom side of the vehicle, the side (rear side) on the rear side of the vehicle with respect to the apex 13 is inclined downward toward the vehicle as it goes toward the rear of the vehicle. The child seat mounting member 20 is fixed along the rear side.

  The hook fixing portion 12 has a front inclined surface 14 formed in front of the vehicle so as to include the apex 13 and a rear inclined surface 15 formed in the rear of the vehicle. The front inclined surface 14 includes a vehicle front side (front side) of the apex 13 of the triangle, and the rear inclined surface 15 includes the rear side of the triangle. A bolt hole 19 is formed in the front inclined surface 14 so that a bolt 35 can be inserted.

  As shown in FIGS. 6 and 7, beads 18 extending along the vehicle front-rear direction are provided on the rear inclined surface 15 at intervals in the vehicle width direction. The leg portion 21 of the child seat mounting member 20 is fixed on the rear inclined surface 15 while being in contact with the bead 18.

  A vehicle downward boss 16 is formed at the rear of the rear inclined surface 15. The bottom surface of the boss 16 is welded onto the rear floor panel 1. The vehicle lower side surface of the boss 16 serves as a rear welded portion 32.

  As shown in FIGS. 6 and 7, a ridge line 17 is provided on the vehicle upper side and both sides in the vehicle width direction with respect to the bottom of the boss 16. The left and right sides of the boss 16 when viewed from the rear of the vehicle are rear inclined surfaces 15 that are raised above the vehicle with respect to the bottom of the boss 16. Further, the outer side in the vehicle width direction is the same height as the rear floor panel 1. This raised portion becomes the ridge line 17. The ridge line 17 extends in the vehicle front-rear direction as shown by the broken line in FIG.

  The longitudinal direction of the leg portion 21 of the child seat mounting member 20 is along the direction in which the ridge line 17 extends (broken line in FIG. 7). In this state, the child seat mounting member 20 is fixed to the mounting bracket 10.

  As can be seen from the above description, according to the present embodiment, the mounting rigidity is improved, and the input from the child seat 40 to the vehicle body can be reliably received by using the rear cross member 2 having high rigidity. Furthermore, the following effects can be acquired by comprising the lower anchorage 5 as mentioned above.

  By forming a substantially triangular closed cross section with high rigidity on the rear floor panel 1 for the hook fixing portion 12, it becomes possible to increase the rigidity and strength of the mounting bracket 10, and the mounting rigidity of the child seat mounting member 20 is effective. Can be high.

  Further, by forming the bead 18 on the rear inclined surface 15, the surface rigidity of the mounting surface of the child seat mounting member 20 is improved. Thereby, the mounting bracket 10 can be made difficult to be deformed with respect to the load from the child seat mounting member 20. Furthermore, since the contact area with the leg 21 of the child seat mounting member 20 can be increased, the mounting strength and rigidity are increased.

  Further, by providing the boss 16, the rigidity of the mounting surface of the mounting bracket 10 can be improved. Furthermore, by arranging the clear ridge line 17 on both sides of the mounting bracket 10 in the vehicle width direction, the input from the child seat 40 can be reliably received and distributed to the vehicle body.

  Furthermore, since the input direction of the load from the child seat 40 and the direction in which the highly rigid ridge line 17 extends coincide with each other, the deformation of the mounting bracket 10 can be suppressed during the load, and the load can be efficiently distributed to the vehicle body. Is possible.

  The description of the above embodiment is an example for explaining the present invention, and does not limit the invention described in the claims. Moreover, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim.

  For example, in this embodiment, the lower surface of the boss 16 and the rear floor panel 1 are welded, and the rear floor panel 1 and the rear cross member 2 of this portion are welded. Also good. Moreover, the front side welding part 35 is good also as a bolt fastening.

DESCRIPTION OF SYMBOLS 1 Rear floor panel 2 Rear cross member 3 Side member 4 Main floor panel 5 Lower anchorage 9 Spare tire storage part 10 Mounting bracket 11 Floor mounting part 12 Hook fixing part 13 Apex 14 Front inclined surface 15 Back inclined surface 16 Boss 17 Edge 18 Bead 19 bolt hole 20 child seat mounting member 21 leg 31 front welded portion 32 rear welded portion 35 bolt 40 child seat 41 connecting member 45 top tether 46 top tether anchorage 50 rear seat 51 seat back 52 seat cushion

Claims (1)

When the child seat is mounted on the rear seat of the vehicle, in the structure of the lower anchorage for the vehicle provided on the vehicle side for attaching the connecting member on the child seat side,
A cross member extending in the vehicle width direction is arranged on the vehicle lower side of the rear floor panel of the vehicle,
The lower anchorage includes a mounting bracket disposed on an upper portion of the rear floor panel,
A floor mounting portion is provided around the mounting bracket,
A cross section of the mounting bracket in the vehicle front-rear direction is substantially triangular, the bottom of the triangle is provided along the upper surface of the rear floor panel, and the vehicle rear side is inclined downward in the vehicle as it goes rearward of the vehicle. Is provided as
An inclined surface including the vehicle rear side is formed,
A boss recessed downward in the vehicle is formed at the rear of the inclined surface of the vehicle, and a vehicle lower surface of the boss is joined to the upper surface of the rear floor panel,
In the state where the rear floor panel is sandwiched between the mounting bracket and the cross member, the mounting bracket, the rear floor panel, and the cross member are configured to be joined at the same location, respectively.
The lower anchorage includes a child seat attachment member for connecting the connecting member of the child seat,
The child seat mounting member is mounted along the vehicle rear side of the mounting bracket,
On both sides of the boss in the vehicle width direction, a ridge line sandwiched between the boss and the floor mounting portion is provided,
The child seat mounting member is fixed to the mounting bracket in a state in which the longitudinal direction of the linearly extending leg portion provided on the child seat mounting member is along the direction in which the ridge line extends. Lower anchorage structure.

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