JP2010247785A - Vehicle mounted object fastening structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle mounted object fastening structure capable of enabling reinforcement by closing an opening end side of a vehicle structural member without using a reinforcement member such as a plate having a closed cross section provided by closing the opening end side of the vehicle structural member. <P>SOLUTION: A bracket 12, in which a connecting part 58 extending from a side portion on the opposite side of an attaching part 52 of a leg 54 is connected to a bottom wall 20 and the like of a rear cross member 18 having a hat shape in cross section, is connected to a flange 26 in which an extending part 62 extended from the attaching part 52 is formed on the cross member 18. Therefore, a cross section of the bottom wall 20 of the rear cross member 18 as seen in a longitudinal direction is closed only by the rear cross member 18 and the bracket 12. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle-mounted object fastening structure for fastening and fixing a fixed part of a vehicle-mounted object mounted on a vehicle to a vehicle body side.

  Japanese Patent Application Laid-Open No. H10-228667 discloses a belt anchor in which a reinforce is provided in a cross section of a rear side member having a hat-shaped cross section that opens toward the upper side of a vehicle, and a webbing that constitutes a seat belt device is engaged with the reinforce. An attached configuration is disclosed.

JP 2007-186040 A

  In the configuration disclosed in Patent Document 1, each flange of the reinforcement is joined to each of the bottom surface, the inner surface, and the outer surface of the rear side member, but the upper surface of the reinforcement is not joined to the rear side member. Therefore, in the configuration disclosed in Patent Document 1, the cross-sectional shape cut in the direction perpendicular to the longitudinal direction of the bottom surface of the rear side member is not closed at the reinforcement mounting portion of the rear side member.

  For this reason, in such a structure, a plate is provided so as to straddle both flanges extending from the upper end of the rear side member on the upper side of the reinforcement, and the bottom surface of the rear side member is joined by joining the plate to both flanges. A cross-sectional shape cut in a direction perpendicular to the longitudinal direction may be reinforced as a closed cross-sectional shape.

  However, providing such a plate increases the number of components and increases the weight.

  In consideration of the above-mentioned fact, the present invention can be mounted on a vehicle that can close and reinforce the opening end side of the vehicle body structural material without relying on a reinforcing member such as a plate that closes the opening end side of the vehicle body structural material to have a closed cross section. The object is to obtain an object fastening structure.

  According to the first aspect of the present invention, there is provided a vehicle mounted article fastening structure according to the first aspect of the present invention, in which the vertical wall that is erected from both ends in the width direction of the bottom wall is spaced from the end opposite to the bottom wall. A mounting portion provided on the opening end side of the vehicle body structural material that is formed in a cross-sectional hat shape in which the flange portion extends toward the direction and whose opening end side is covered with a floor member, and the bottom wall of the mounting portion A leg portion extending from the end portions located on both sides in the longitudinal direction toward the bottom wall side and integrally fixed to at least one of the bottom wall and the vertical wall; and Extending from an end located on the width direction side of the bottom wall and disposed between the floor member and the flange portion and integrally fixed to the flange portion. A vehicle provided on the opposite side of the floor member from the mounting portion. Integrally fastened fixing the fixing portion in a state sandwiching the floor member to the attachment portion by the fixing portion of the payload and said attachment portion.

  In the vehicle mounted article fastening structure according to the first aspect of the present invention, a bracket is provided on a vehicle body structural material such as a skeleton member that constitutes the skeleton of the vehicle and a reinforcing member that reinforces such a skeleton member. The vehicle body structural material has a bottom wall. Vertical walls are erected from both ends of the bottom wall in the width direction, and a flange portion is bottomed from an end of the vertical wall opposite to the bottom wall. It extends outward in the width direction of the wall. For this reason, the cross-sectional shape of the vehicle body structural material is generally a hat shape, and a floor member that constitutes the floor of the vehicle is provided so as to cover the opening side of the vehicle body structural material. A mounting portion of the bracket is provided on the opening side of the vehicle body structural material. On the opposite side of the floor member mounting portion, there is a fixed portion of the vehicle-mounted object, and with the floor member sandwiched between the fixing portion and the bracket mounting portion, the fixing portion is fastened and fixed to the mounting portion together with the floor member. Is done.

  On the other hand, legs extend from the ends located on both sides in the longitudinal direction of the bottom wall (body structure material) of the bracket mounting portion toward the bottom wall, and these legs are the bottom of the body structure material. It is integrally fixed to at least one of the wall and the vertical wall of the vehicle body structural member. As described above, the bracket in which the leg portion extends from both ends in the longitudinal direction of the bottom wall (vehicle body structural material) in the mounting portion has a shape seen along the longitudinal direction of the bottom wall constituting the vehicle structural material, It has a concave shape that opens toward the bottom wall. For this reason, a closed cross section is formed by the attachment portion, both the leg portions, and the bottom wall by integrally fixing the above-mentioned leg portion to the bottom wall of the vehicle body structural material. Thereby, the rigidity of the vehicle body structural material in the site | part which fastened and fixed the fixing | fixed part of the vehicle mounting thing can be improved.

  Further, an extension portion extends from an end portion of the attachment portion located on the width direction side of the bottom wall (vehicle body structural material). This extending portion is integrally fixed to the flange portion of the vehicle body structural material. Therefore, when the extending portion extends from the end portion located on one side in the width direction of the bottom wall in the mounting portion, the bottom of the vertical walls and both flange portions constituting the vehicle body structural material When the vertical wall or flange part on the other side in the width direction of the wall is fixed directly or indirectly integrally, the bottom wall, both vertical walls, both flange parts, both extension parts, and attachment A closed cross-sectional shape can be formed with the part.

  On the other hand, when extending the extended portion from the end portion located on both sides in the width direction of the bottom wall in the mounting portion, each of the extended portions is integrally fixed to the corresponding flange portion, A closed cross-sectional shape is formed by the bottom wall, both vertical walls, both flange portions, both extending portions, and the mounting portion. In this way, since the cross-sectional shape seen in the longitudinal direction of the bottom wall at the portion where the fixed portion of the vehicle-mounted object is fastened and fixed can be made into a closed cross-section, it is possible to withstand bending around the axis with the width direction of the bottom wall as the axial direction. The rigidity of the vehicle body structural material can be improved.

  Also, if the vehicle load is about to move or be pulled in a direction that is inclined in the width direction of the bottom wall of the vehicle body structure material with respect to the opening direction of the vehicle body structure material, fasten the fixed part of the vehicle load material A moment around the axis is generated around the region where the longitudinal direction of the bottom wall is the axial direction. On the other hand, since the extension part extended from the attachment part is integrally coupled to the flange part of the vehicle body structural material, it has high rigidity with respect to the external force that causes the above moment. It is possible to prevent or effectively suppress the collapse of the cross-sectional shape of the above-mentioned closed cross-section due to an external force that generates a moment of.

  According to a second aspect of the present invention, there is provided the vehicle mounted article fastening structure according to the first aspect of the present invention, wherein the mounting portion of the mounting portion is located on both sides in the width direction of the bottom wall. The extension part is extended from the end of the object opposite to the direction of the tensile force applied to the fixed part.

  In the vehicle mounted article fastening structure according to the second aspect of the present invention, of the end parts located on both sides in the width direction of the bottom wall (vehicle body structural material) in the mounting part constituting the bracket, the fixed part of the vehicle mounted article The extension portion extends from the end opposite to the direction of the tensile force applied to (i.e., the direction of the width direction component of the bottom wall included in the tensile force). Since the extension portion and the flange portion of the vehicle body structural member are integrally fixed, an axis whose axial direction is the longitudinal direction of the bottom wall centered on the fastening portion of the fixed portion of the vehicle-mounted object by the pulling force described above. Even if a surrounding moment is generated, the closed cross-section is not easily broken, and it is possible to prevent or suppress the fixing between the bracket leg and the bottom wall or vertical wall of the vehicle structural member.

  According to a third aspect of the present invention, there is provided the vehicle mounted article fastening structure according to the first or second aspect of the invention, wherein each of the end portions of the attachment portion located on both sides in the width direction of the bottom wall is provided. The extension portion extends from the top.

  In the vehicle mounted article fastening structure according to the third aspect of the present invention, the extending portion extends from the end portion located on both sides in the width direction of the bottom wall (vehicle body structural material) in the mounting portion constituting the bracket, Each of these extending portions is fastened and fixed to each flange portion of the vehicle body structural material. For this reason, the cross-sectional shape of the portion where the bracket is provided in the longitudinal direction of the bottom wall constituting the vehicle body structural material is closed only by the bracket and the vehicle body structural material. For this reason, sufficient rigidity can be secured without providing a reinforcing member for closing the opening side of the vehicle body structural material so as to have a closed cross section separately from the bracket, and the reinforcing member provided separately from such a bracket At the same time, if the structure is such that the opening side of the vehicle body structural material is closed by a bracket, the rigidity can be further improved.

  In particular, in the configuration in which the reinforcing member is interposed between the bracket mounting portion and the floor member, a hole through which a fastening means such as a bolt for fastening the fixed portion of the vehicle mounted article to the bracket mounting portion passes is provided in the bracket. It must be formed on all of the mounting part, the reinforcing member, and the floor member. In this case, the inner diameter dimension of the hole of the reinforcing member is larger than the inner diameter dimension of the hole of the bracket mounting portion in consideration of the formation position of each hole and the assembly error of each member. The dimension must be larger than the inner diameter of the hole in the reinforcing member. For this reason, the hole of a floor member will become large.

  On the other hand, if the present invention is applied to form a closed cross section only with the vehicle body structural material and the bracket without providing the reinforcing member, the inner diameter of the hole of the floor member is formed at the mounting portion of the bracket. The inner diameter dimension of the hole of the floor member can be made smaller as long as it is larger than the inner diameter dimension of the hole, and the assembly accuracy of the fixed portion of the vehicle-mounted object is improved.

  Further, when a tensile force is applied to the fixed portion of the vehicle-mounted object, a moment around the axis is generated with the longitudinal direction of the bottom wall centering on the fastening portion of the fixed portion of the vehicle-mounted object being the axial direction. Here, the direction of the tensile force applied to the fixed portion of the vehicle-mounted object among the end portions located on both sides in the width direction of the bottom wall (vehicle body structural material) in the mounting portion (more specifically, For example, when extending from the end on the side of the width direction component of the bottom wall included in the pulling force, the extending portion to be rotated by the pulling force interferes with the flange portion of the vehicle body structural material. Rotation is regulated. Thereby, said moment is canceled.

  According to a fourth aspect of the present invention, there is provided a vehicle mounted article fastening structure according to any one of the first to third aspects, wherein a seat belt device mounted on a vehicle is the vehicle mounted article. The seat belt anchor that is fastened and fixed to the bracket by locking the front end side of the webbing belt that constitutes the seat belt device is used as the fixing portion.

  In the vehicle mounted article fastening structure according to the fourth aspect of the present invention, the seat belt device mounted on the vehicle is the vehicle mounted article. Further, a seat belt anchor that engages the front end side of the webbing belt constituting the seat belt device is used as a fixing portion, and is fastened and fixed to the mounting portion of the bracket.

  The webbing belt is pulled when an occupant seated on the vehicle seat wears the webbing belt on the body or when the vehicle decelerates. When the webbing belt is pulled in this manner, the seat belt anchor with which the front end side of the webbing belt is locked is pulled, so that the longitudinal direction of the bottom wall is pivoted around the fastening portion between the seat belt anchor and the mounting portion. A moment around the axis as a direction is generated, and a pulling force having this moment tries to break the cross-sectional shape of the closed cross section when viewed along the longitudinal direction of the bottom wall.

  However, as described above, since the extension portion of the bracket is integrally coupled to the flange portion of the vehicle body structural material, the bracket has high rigidity against an external force that generates such a moment. It is possible to prevent or effectively suppress the collapse of the cross-sectional shape of the closed cross-section due to an external force that generates a moment.

  As described above, in the vehicle mounting structure according to the first aspect of the present invention, at least one side along the width direction of the bottom wall at the opening end of the vehicle body structural member is integrally fixed to the extending portion. Therefore, the rigidity can be improved without greatly depending on the reinforcing member.

  In the vehicle mounted article fastening structure according to the second aspect of the present invention, in particular, the rigidity against the tensile force applied to the fixed portion of the vehicle mounted article can be improved.

  In the vehicle mounted article fastening structure according to the third aspect of the present invention, the opening end of the vehicle body structural member can be closed without providing a reinforcing member for closing the opening end of the vehicle body structural member, thereby improving rigidity. In addition, the number of parts can be reduced and the rigidity can be further improved. Furthermore, when it is set as the structure which does not provide said reinforcement member, the positional accuracy of the fixing | fixed part of a vehicle mounting thing can be improved. Moreover, when the extension portion is extended from the end portion on the side in the direction of the tensile force applied to the fixed portion among the end portions located on both sides in the width direction of the bottom wall in the mounting portion, the extension portion is caused by the tensile force. The generated moment can be canceled.

  In the vehicle mounted article fastening structure according to the fourth aspect of the present invention, high rigidity can be obtained with respect to the tensile force applied to the seat belt anchor by pulling the webbing belt constituting the seat belt device.

It is a disassembled perspective view which shows the principal part of a structure of the vehicle mounted article fastening structure which concerns on one embodiment of this invention. It is side surface sectional drawing which shows the principal part of a structure of the vehicle mounted article fastening structure which concerns on one embodiment of this invention. It is a perspective view which shows the modification of a bracket.

<Configuration of the present embodiment>
In FIG. 1, a vehicle-mounted object fastening structure according to an embodiment of the present invention is applied, and a seatbelt anchor 16 as a fixing portion of a seatbelt device 14 which is an aspect of the vehicle-mounted object is provided via a bracket 12. The example fixed to the rear cross member 18 as a vehicle body structural material is shown. In each of the drawings including FIG. 1, the arrow FR indicates the front of the vehicle, the arrow LF indicates the left in the vehicle width direction, and the arrow UP indicates the upper side of the vehicle.

(Configuration of rear cross member 18)
First, the configuration of the rear cross member 18 will be described. The rear cross member 18 includes a bottom wall 20. The bottom wall 20 has a plate shape whose longitudinal direction is generally along the vehicle width direction (arrow LF direction in FIG. 1 and its opposite direction) and whose width direction is generally along the vehicle front-rear direction (arrow FR direction and its opposite direction in FIG. 1). Is formed. From both ends of the bottom wall 20 in the width direction, plate-like vertical walls 22 whose thickness direction is along the front-rear direction of the vehicle are erected substantially upward (in the direction of the arrow UP in FIG. 1) of the vehicle. . A flange portion 26 extends from the upper end portions of these vertical walls 22 (that is, the end portion of the vertical wall 22 opposite to the bottom wall 20).

  Each flange portion 26 is formed in a plate shape whose thickness direction is substantially along the vertical direction of the vehicle (the arrow UP direction in FIG. 1 and the opposite direction thereof), and on the vehicle front side of the pair of front and rear vertical walls 22. A flange portion 26 extends from the upper end portion of the vertical wall 22 positioned substantially toward the front side of the vehicle, and a flange portion extends from the upper end portion of the vertical wall 22 positioned at the rear side of the vehicle toward the rear side of the vehicle. 26 (that is, each flange portion 26 extends from the upper end portion of the vertical wall 22 toward the outside in the width direction of the bottom wall 20). Thus, the rear cross member 18 is formed in a hat shape that is opened substantially upwardly toward the vehicle.

  A rear floor side member 30 which is an example of another aspect of the vehicle body structural material is provided at both ends in the vehicle width direction of the rear cross member 18 (in FIG. 1, the rear floor side member 30 on the left side in the vehicle width direction is provided. Only the rear floor side member 30 on the right side in the vehicle width direction is not shown).

  The rear floor side member 30 has a bottom wall (not shown). The bottom wall is formed in a plate shape whose longitudinal direction is substantially along the longitudinal direction of the vehicle and whose width direction is substantially along the vehicle width direction. From both ends of the bottom wall in the width direction, plate-like vertical walls 34 whose thickness direction is along the front-rear direction of the vehicle are erected substantially upward (in the direction of the arrow UP in FIG. 1) of the vehicle. A flange portion 38 extends from the upper end portions of these vertical walls 34 (that is, the end portion on the side opposite to the bottom wall of the vertical walls 34). Each flange portion 38 is formed in a plate shape whose thickness direction is substantially along the vertical direction of the vehicle (the arrow UP direction in FIG. 1 and the opposite direction thereof), and of the pair of left and right vertical walls 34, the left side in the vehicle width direction. A flange portion 38 extends from the upper end of the vertical wall 34 positioned substantially to the left of the vehicle, and from the upper end of the vertical wall 34 positioned to the right of the vehicle width direction, generally toward the right of the vehicle. A flange portion 38 is extended.

  As described above, the rear floor side member 30 is also formed in a hat shape that is opened substantially upward toward the vehicle as in the case of the rear cross member 18. The left end in the vehicle width direction of the rear cross member 18 is integrally joined to the rear floor side member 30 located on the left in the vehicle width direction, and the right end in the vehicle width direction of the rear cross member 18 is positioned on the right in the vehicle width direction. The rear floor side member 30 is integrally joined.

  A rear floor panel 42 as a floor member is provided above the rear cross member 18 and the rear floor side member 30. The rear floor panel 42 is formed in a plate shape whose thickness direction is substantially along the vehicle vertical direction, and the opening end of the rear cross member 18 (that is, the flange portion 26 side of the rear cross member 18) and the opening end of the rear floor side member 30 (that is, the opening end). The flange portion of the rear cross member 18 is arranged on the rear cross member 18 or the rear floor side member 30 so as to close the flange portion 38 side of the rear floor side member 30 and is fixed by a fixing means such as welding (for example, spot welding). 26 and the flange portion 38 of the rear floor side member 30 are integrally fixed.

(Configuration of bracket 12)
The bracket 12 is disposed inside the rear cross member 18 (that is, generally between both vertical walls 22). The bracket 12 includes a mounting portion 52. The mounting portion 52 is formed in a flat plate shape whose thickness direction is substantially along the vertical direction of the vehicle. A leg portion 54 extends substantially downward from the end of the mounting portion 52 located at both ends of the bottom wall 20 in the longitudinal direction. The outer peripheral shape of the leg portion 54 is along the inner shape of the rear cross member 18 constituted by the bottom wall 20 and the vertical walls 22.

  A joint portion 58 extends from the outer peripheral portion of these leg portions 54 outward in the longitudinal direction of the bottom wall 20. The joint 58 is in contact with one surface in the thickness direction facing the upper surface in the thickness direction of the bottom wall 20 and the inner surface in the thickness direction of both vertical walls 22, and the joint 58 is welded (for example, spot welding). Etc., and is integrally joined to either the bottom wall 20 or both the vertical walls 22. In this way, the joint portion 58 is integrally joined to the bottom wall 20 and the vertical wall 22, so that when the arrangement portion of the bracket 12 on the rear cross member 18 is viewed in the width direction of the bottom wall 20, the attachment portion The shape of the cross section constituted by 52, both leg portions 54 and the bottom wall 20 is a so-called “closed cross-sectional shape”.

  On the other hand, the extension part 62 is extended from the edge part located in the width direction both sides of the bottom wall 20 in the attaching part 52. As shown in FIG. The extension part 62 is formed in a flat plate shape whose thickness direction is substantially equal to the thickness direction of the attachment part 52, and is closer to the center than the ends located on both sides in the longitudinal direction of the bottom wall 20 in the attachment part 52, The mounting portion 52 extends outward in the width direction of the bottom wall 20 from ends located on both sides in the width direction of the bottom wall 20. Moreover, the dimension along the longitudinal direction of the bottom wall 20 in the extension part 62 is gradually reduced toward the outer side in the width direction of the bottom wall 20, and the extension part 62 is outward of the bottom wall 20 in plan view. It has a substantially triangular shape with the side at the top.

  Of the pair of front and rear extension parts 62, the extension part 62 located on the vehicle front side opposes the flange part 26 located on the vehicle front side of the pair of front and rear flange parts 26 in the vehicle vertical direction and welds ( For example, the front extension 62 and the front flange 26 are integrally joined by spot welding or the like. Of the pair of front and rear extension parts 62, the extension part 62 located on the vehicle rear side faces the flange part 26 located on the vehicle rear side of the pair of front and rear flange parts 26 in the vehicle vertical direction, and is welded. The rear extension 62 and the rear flange 26 are integrally joined by, for example, spot welding.

  As described above, the extension part 62 extends from the attachment part 52. Therefore, when the arrangement portion of the bracket 12 in the rear cross member 18 is viewed in the longitudinal direction of the bottom wall 20, the mounting portion 52, both extending portions 62, both flange portions 26, the vertical wall 22, and the bottom wall 20 The shape of the cross section formed by the so-called “closed cross-sectional shape”.

  The rear floor panel 42 is positioned above the mounting portion 52 and the extended portions 62, and therefore the extended portions 62 are sandwiched between the flange portion 26 and the rear floor panel 42. The flange portion 26 of the rear cross member 18 and the flange portion 38 of the rear floor side member 30 and the rear floor panel 42 are appropriately integrally joined by welding or the like. In this embodiment, the extension portion 62 is a flange. In the portion facing the portion 26, the flange portion 26 and the rear floor panel 42 are not integrally joined (that is, welding or the like is not performed in this portion).

  A substantially circular circular hole 72 is formed in the mounting portion 52 constituting the bracket 12 described above. The circular hole 72 penetrates the attachment portion 52 in the thickness direction on the center side in the longitudinal direction of the bottom wall 20 in the attachment portion 52 and on the center side in the width direction. A circular hole 74 having a slightly larger inner diameter than the circular hole 72 is formed in the rear floor panel 42 corresponding to the circular hole 72. The circular hole 74 is formed to face the circular hole 72 in a state where the rear floor panel 42 is disposed at a predetermined position on the rear cross member 18 and the rear floor side member 30.

(Configuration of seat belt anchor 16)
The seat belt anchor 16 is provided on the opposite side of the mounting portion 52 via the rear floor panel 42 (that is, the position corresponding to the position of the bracket 12 on the rear floor panel 42). The seat belt anchor 16 includes a base portion 82. The base portion 82 is formed in a flat plate shape whose thickness direction is substantially along the vertical direction of the vehicle, and the lower surface in the thickness direction of the base portion 82 and the upper surface in the thickness direction of the rear floor panel 42 face each other. Thus, the seat belt anchor 16 is disposed on the rear floor panel 42.

  A circular circular hole 84 is formed at the center in the longitudinal direction and the center in the width direction of the base 82, and the circular hole 84 and the circular hole 74 are formed with the seat belt anchor 16 disposed on the rear floor panel 42. Opposing, the circular hole 72 formed in the attachment portion 52, the circular hole 74 formed in the rear floor panel 42, and the circular hole 84 formed in the base portion 82 communicate with each other. Bolts 86 constituting fastening means pass through the circular holes 72, 74, 84 communicated in this way from the upper side of the rear floor panel 42.

  Corresponding to the bolts 86 passing through the circular holes 72, 74, 84, nuts (weld nuts) 88 that constitute fastening means together with the bolts 86 are provided on the back surface (surface opposite to the rear floor panel 42) of the mounting portion 52. The mounting portion 52 is integrally provided. When the bolt 86 that has passed through the circular holes 72, 74, 84 is screwed into the nut 88 and tightened, the base portion 82 (that is, the seat belt anchor 16) is fastened and fixed to the bracket 12 together with the rear floor panel 42, and as a result, the rear cross It is fixed to the member 18.

  On the other hand, vertical wall portions 90 are erected from the ends of the base portion 82 on both sides in the vehicle width direction. Belt passage holes 92 are formed in these vertical wall portions 90. The belt passage hole 92 of each vertical wall portion 90 has a slit shape in which the longitudinal direction is along the width direction of the vertical wall portion 90 (that is, the vehicle longitudinal direction). The front end side in the longitudinal direction of the webbing belt 94 constituting the seat belt device 14 passes through each belt passage hole 92 of each vertical wall portion 90.

  The webbing belt 94 that has passed through the belt passage hole 92 through one side in the thickness direction of the vertical wall portion 90 is folded back and passes through the other side in the thickness direction of the vertical wall portion 90. It is joined to the portion on the proximal end side in the longitudinal direction with respect to the passage portion of 92 by sewing or the like. Thereby, the front end side in the longitudinal direction of the webbing belt 94 is locked to the seat belt anchor 16.

  In the present embodiment, the seat belt anchor 16 is provided below the seat cushion (not shown) constituting the rear seat (not shown) and behind the seat cushion. The longitudinal base end portion of the webbing belt 94 whose front end is locked to the seat belt anchor 16 is locked to a spool of a webbing take-up device (not shown). This webbing take-up device has a vehicle body constituting member different from the rear cross member 18 and the rear floor side member 30 and a skeleton member constituting the skeleton of the seat back on the rear side of the seat back (not shown) constituting the rear seat. Directly or indirectly.

  The webbing belt 94 whose longitudinal base end is locked to the spool of the webbing take-up device is directed from the upper end of the seat back of the rear seat toward the lower side of the seat back along the front surface of the seat back. The front end side is locked to the seat belt anchor 16 through the gap. An occupant seated at a seating position corresponding to the seat belt device 14 in the rear seat pulls the webbing belt 94 and hangs the webbing belt 94 on the front side of the body to wear the webbing belt 94.

<Operation and effect of the present embodiment>
Next, the operation and effect of the present embodiment will be described.

  As described above, when the portion of the rear cross member 18 where the bracket 12 is provided is viewed in the width direction of the bottom wall 20, the shape of the cross section constituted by the mounting portion 52, both legs 54 and the bottom wall 20 is the same. When the portion of the rear cross member 18 where the bracket 12 is provided is viewed in the longitudinal direction of the bottom wall 20, the mounting portion 52, both extending portions 62, and both flange portions 26 are formed. The cross-sectional shape formed by the vertical wall 22 and the bottom wall 20 is a so-called “closed cross-sectional shape”. For this reason, the portion where the bracket 12 is provided in the rear cross member 18 has high rigidity, and the change in the cross-sectional shape due to the external force can be effectively suppressed.

  In particular, in the present embodiment, the seat belt anchor 16 in which the front end side of the webbing belt 94 is locked is fastened and fixed to the bracket 12. Here, for example, when the occupant seated on the rear seat wears the webbing belt 94, the occupant pulls the webbing belt 94. When the vehicle body decelerates and the occupant's body attempts to move inertially, the webbing belt 94 attached to the occupant's body is pulled by the occupant's body.

  When the webbing belt 94 is pulled in this way, as shown in FIG. 2, the pulling force F in the direction in which the vertical wall portion 90 is inclined upwardly with respect to the front side of the vehicle on the front end side of the webbing belt 94. Then pull the vertical wall 90. When such a pulling force F is applied to the seat belt anchor 16, the fastening portion between the seat belt anchor 16 and the bracket 12, that is, the longitudinal direction of the bottom wall 20 centering on the position of the bolt 86 is the axial direction. A moment M around the axis is generated. The direction of the moment M is such that the upper end portion of the webbing belt 94 (that is, the end portion opposite to the base portion 82) is tilted forward of the vehicle.

  The pulling force F is transmitted to the bracket 12 via the bolt 86, and the mounting portion 52 of the bracket 12 tends to move in a direction inclined toward the vehicle front side with respect to the vehicle upper side along with the rear floor panel 42. However, in the present embodiment, as described above, the extension portion 62 is joined to the flange portion 26, so that the cross-sectional shape when viewed in the longitudinal direction of the bottom wall 20 is a closed cross-sectional shape as described above. Therefore, the collapse of the cross-sectional shape due to such a pulling force is prevented or effectively suppressed.

  Moreover, when the bracket 12 tries to rotate around the axis having the longitudinal direction of the bottom wall 20 as the axial direction by the pulling force F as described above, the bracket 12 extends from the end on the vehicle front side of both ends in the width direction. The extended portion 62 that has been extended interferes with the flange portion 26 located on the front side of the vehicle, and the rotation of the extended portion 62 is restricted. Since the rotation of the extension portion 62 is restricted in this way, the rotation of the bracket 12 is restricted or suppressed, so that the moment M can be canceled.

  Moreover, in the present embodiment, since the two extending portions 62 extending from the attachment portion 52 are joined to the flange portion 26 of the rear cross member 18, the closed cross-sectional structure as described above is formed. A closed cross-sectional structure can be formed only by the rear cross member 18 and the bracket 12. For this reason, when forming a closed cross-sectional structure, it is not necessary to use a reinforcing member joined to both flange portions 26 in a state of straddling both flange portions 26, the number of parts can be reduced, and the cost can be reduced. .

  Further, in the configuration in which such a reinforcing member is separately provided, a hole through which the bolt 86 passes must be formed in the reinforcing member. This reinforcing member is interposed between the mounting portion 52 and the rear floor panel 42. For this reason, not only the assembly error of the bracket 12 and the rear floor panel 42 to the rear cross member 18 but also the assembly error of the reinforcing member to the rear cross member 18 occurs, so it is difficult to assemble the seat belt anchor 16 with high positional accuracy. .

  Moreover, considering such assembly errors, the inner diameter of the hole of the reinforcing member is set to be larger than the inner diameter of the circular hole 72 of the mounting portion 52, and the inner diameter of the circular hole 74 of the rear floor panel 42 is reinforced. It must be set larger than the inner diameter of the member. When the inner diameter of the circular hole 74 is increased in this way, it is difficult to keep the high mechanical strength around the circular hole 74 on the rear floor panel 42.

  On the other hand, in the present embodiment, it is not necessary to use the reinforcing member as described above, so that the seat belt anchor 16 can be assembled with high positional accuracy. In addition, since the inner diameter of the circular hole 74 only needs to be larger than the inner diameter of the circular hole 72, an increase in the inner diameter of the circular hole 74 can be suppressed, and the mechanical strength of the rear floor panel 42 around the circular hole 74 is improved. it can.

(Supplementary information)
In the present embodiment, as described above, a reinforcing member separate from the rear cross member 18 and the bracket 12 is not provided. However, the flanges 26 are separated from both the flanges 26 separately from the bracket 12. The structure which provides the reinforcement member joined may be sufficient. In such a configuration, although the effects of reducing the number of parts as described above and improving the accuracy of the assembly position of the seat belt anchor 16 cannot be obtained, the effect of improving the rigidity by providing the reinforcing member and the flange portion 26 are improved. Both of the effects of improving the rigidity by joining the extending portion 62 can be obtained. Therefore, with such a configuration, even higher rigidity can be obtained, and when a particularly high rigidity is not required, the reinforcing member can be thinned and the effect of reducing weight can be obtained.

  Moreover, in this Embodiment, it was the structure which extended the extension part 62 from the edge part located in the width direction both sides of the bottom wall 20 in the attaching part 52. As shown in FIG. However, the extension portion 62 is extended from only one of the end portions of the attachment portion 52 located on both sides in the width direction of the bottom wall 20 and joined to the flange portion 26, and the other end of the bottom wall 20 is connected. On the side, the above-described reinforcing member may be provided to provide a closed cross-sectional structure. Further, the reinforcing member is joined to both flange portions 26 so as to straddle both flange portions 26 as described above, and the extending portion 62 extending from one side in the width direction of the bottom wall 20 in the mounting portion 52 is used as the reinforcing member. It is good also as a structure joined to the flange part 26 with it. By adopting such a configuration, it is possible to particularly improve the rigidity against an external force in a specific direction, such as the pulling force as described above.

  Furthermore, in the present embodiment, the shape of the extension portion 62 is a substantially triangular shape with the width direction outer side of the bottom wall 20 as the top portion, but the shape of the extension portion 62 is limited to such a shape. It is not a thing. For example, as shown in FIG. 3, the extension part 62 is formed in a rectangular shape in which the dimension of the extension part 62 along the same direction as the dimension of the attachment part 52 along the longitudinal direction of the bottom wall 20 is substantially equal. Also good. Thus, if the shape of the extension part 62 is made into a rectangular shape, since the number of spot welding spots can be increased, the joint strength can be improved.

  When forming the bracket 12 having the extending portion 62 having the shape as described above, a metal flat plate is drawn and formed. However, the shape of the extending portion 62 is changed from the width direction of the bottom wall 20 as described above. Since it is possible to form by a press molding in a configuration having a substantially triangular shape with the side as the top, a configuration in which the shape of the extension 62 is a substantially triangular shape with the width direction outer side of the bottom wall 20 as the top is Not bad in terms of formability and processing cost.

  Further, in the present embodiment, the bracket 12 is provided on the rear cross member 18, but the vehicle body structural material on which the bracket 12 is provided is not limited to the rear cross member 18, for example, the rear floor side member The structure which provides the bracket 12 in 30 may be sufficient.

  Further, in the present embodiment, the “vehicle-mounted item” in the claims is the seat belt device 14, but the vehicle-mounted item is not limited to the seat belt device 14. For example, the above-described rear seat may be referred to as “vehicle-mounted item” in the claims, and the present invention may be applied to fasten and fix the rear seat.

12 Bracket 14 Seatbelt device (vehicle mounted)
16 Seat belt anchor (fixed part)
18 Rear cross member (body structure)
20 Bottom wall 22 Vertical wall 26 Flange part 42 Rear floor panel (floor member)
52 Attaching part 54 Leg part 62 Extension part 86 Bolt (fastening means)
88 Nut (fastening means)

Claims (4)

A vertical wall erected from both ends in the width direction of the bottom wall is formed into a cross-sectional hat shape in which a flange portion is extended outward in the width direction of the bottom wall from the end opposite to the bottom wall. Mounting portion provided on the opening end side of the vehicle body structural material whose opening end side is covered with the floor member,
Legs that extend toward the bottom wall from the ends of the mounting portion located on both sides in the longitudinal direction of the bottom wall and are integrally fixed to at least one of the bottom wall and the vertical wall. And
An extending portion that extends from an end portion of the mounting portion that is located on the width direction side of the bottom wall, is disposed between the floor member and the flange portion, and is integrally fixed to the flange portion;
The bracket is configured to include the mounting member, and the floor member is sandwiched between the mounting portion and the mounting portion of the vehicle-mounted object provided on the opposite side of the mounting portion of the floor member. A vehicle-mounted object fastening structure that is fastened and fixed integrally to the mounting portion.   Out of the end portions of the attachment portion located on both sides in the width direction of the bottom wall, the extension portion is extended from the end portion on the opposite side to the direction of the tensile force applied to the fixed portion of the vehicle-mounted object. The vehicle-mounted object fastening structure according to claim 1.   The vehicle mounted article fastening structure according to claim 1 or 2, wherein the extension portion is extended from each of end portions located on both sides in the width direction of the bottom wall in the attachment portion.   The seatbelt device mounted on a vehicle is the vehicle-mounted item, and a seatbelt anchor that is fastened and fixed to the bracket by locking the front end side of the webbing belt constituting the seatbelt device is used as the fixing portion. The vehicle mounted article fastening structure according to any one of claims 1 to 3.

Images