JP2012101720A - Seat belt anchor fitting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat belt anchor fitting structure capable of keeping a sufficient connecting strength at a vehicle body structure member to which the seat belt anchor is fitted under a tensile load input from the seat belt anchor even if a special countermeasure such as an increase in plate thickness or a reinforcement and the like is not applied.SOLUTION: A slip joint 26 is supported by an anchor bolt 106 at a connecting portion between a flange part 70 of a header upper element 62 set behind the sectional shape in a rear header 40 and a flange part 52 of a rear header 40. With this arrangement, a tensile force applied to the slip joint 26 does not act as a peeling load for peeling off the flange part 52 from the flange part 70. This arrangement makes it possible to assure a connecting strength between the flange part 52 and the flange part 70 even if a special countermeasure such as an increase in plate thickness of the flange part 52 or the flange part 70 or an increased number of welding points for use in connecting the flange part 52 with the flange part 70 is not applied.

Description

  The present invention relates to a seatbelt anchor mounting structure for mounting a seatbelt anchor that supports a front end portion and an intermediate portion of a webbing of a seatbelt device.

  Patent Document 1 below discloses a configuration in which a seat belt anchor is attached to a rear roof rail. The rear roof rail is closed by sandwiching and welding an outer panel flange portion formed in a cross-sectional hat shape in a vehicle side view and an inner panel flange portion formed in a cross-sectional hat shape opposite to the outer panel. It is integrally joined to the cross-sectional shape. The seat belt anchor is attached to the bottom wall of the inner panel by bolts with respect to the rear roof rail having such a configuration.

Japanese Unexamined Patent Publication No. 2000-168498

  In the configuration as described above, when the inner panel is pulled through the webbing (seat belt) and the seat belt anchor, this pulling force tries to peel the flange portion of the inner panel from the flange portion of the outer panel (that is, the above-mentioned The pulling force acts as a peeling load on the joint portion between the flange portion of the inner panel and the flange portion of the outer panel).

  For this reason, in such a configuration, the thickness of the inner panel or the outer panel is increased to improve the welding strength in the welded portion, the number of welding points is increased in the case of spot welding, or a separate reinforcing member is provided. It was necessary to provide sufficient bonding strength.

  In consideration of the above-described facts, the present invention provides a vehicle body structural material in which a seatbelt anchor is attached to a tensile load input from the seatbelt anchor without special measures such as an increase in plate thickness or reinforcement. It is an object to obtain a seat belt anchor mounting structure capable of maintaining sufficient bonding strength.

  The seat belt anchor mounting structure according to the first aspect of the present invention is joined to the first structural material so as to form a closed cross-sectional shape together with the first structural material constituting the vehicle body structural material and the first structural material. And passing through a joint portion between the second structural material constituting the vehicle body structural material and the first structural material and the second structural material, and one of the first structural material and the second structural material. And an anchor bolt for supporting a seat belt anchor provided on the opposite side of the other structural material.

  According to the seat belt anchor attachment structure of the first aspect, the seat belt anchor of the seat belt device is attached to the vehicle body structural member. The vehicle body structural material is formed by joining the first structural material and the second structural material, and has a closed cross-sectional shape composed of the first structural material and the second structural material. In the vehicle body structural material having such a closed cross-sectional shape, the seat belt anchor is supported by an anchor bolt that penetrates the joint portion between the first structural material and the second structural material.

  As described above, in the seat belt anchor mounting structure according to the present invention, the seat belt anchor is attached to the vehicle body structural member having the closed cross-sectional shape, whereby the webbing constituting the seat belt device is pulled and the seat belt anchor is interposed. Thus, it is possible to efficiently secure rigidity against a load input to the vehicle body structural material.

  Further, an anchor bolt is provided at a joint portion between the first structural material and the second structural material (that is, a support point of the seat belt anchor is set), and the first structural material and the second structural material are The joint portion and the support point of the seat belt anchor are not separated from each other. In addition, a seat belt anchor is provided on the opposite side of the one structural material of the first structural material and the second structural material to the other structural material. For this reason, when the seat belt anchor is pulled by the webbing, the seat belt anchor pulls the anchor bolt head and the nut that is fastened to the anchor bolt on the opposite side of the structural members of the seat belt anchor. . As a result, of the head and nut of the anchor bolt, the one positioned on the side opposite to the seat belt anchor of both structural members presses the other structural member toward the one structural member.

  As described above, in the seat belt anchor mounting structure according to the present invention, the tensile force applied to the seat belt anchor does not act so as to peel off the first structural material and the second structural material. For this reason, the joining of the first structural material and the second structural material can be maintained.

  According to a second aspect of the present invention, there is provided a seat belt anchor mounting structure according to the first aspect of the present invention, wherein the seat belt anchor mounting structure is provided so as to extend in the vehicle width direction along the rear end of the ceiling of the vehicle. The header upper constituting the rear header is used as the first structural material, and the header lower which is provided so as to extend in the vehicle width direction below the header upper and forms the rear header together with the header upper is used as the second structural material. The closed cross-sectional shape is formed in the middle part in the front-rear direction, and the anchor bolt is provided on the rear side of the closed cross-sectional shape.

  According to the seat belt anchor mounting structure of claim 2, the header upper as the first structural member constituting the rear header as the vehicle body structural member extends in the vehicle width direction along the rear end of the ceiling portion of the vehicle. A header lower as a second structural member which is provided and constitutes a rear header together with the header upper is provided so as to extend in the vehicle width direction below the header upper. When this header upper and header lower are joined, a closed cross-sectional shape is formed at the middle part of the rear header in the vehicle longitudinal direction.

  Here, the joint portion between the header upper and the header lower where the anchor bolt is provided is set on the rear side of the portion having the closed cross-sectional shape. For this reason, the seat belt anchor support point is separated from the occupant to the rear side as compared with the case where the seat belt anchor support point is set at the closed cross sectional shape portion of the rear header and the front portion of the rear header closed cross sectional shape. And the space between the occupant and the seat belt anchor can be secured.

  According to a third aspect of the present invention, there is provided a seat belt anchor mounting structure according to the second aspect of the present invention, wherein the back door hinge is configured to support the back door provided at the rear end portion of the vehicle so as to be pivotable up and down. A joint portion between the header upper and the header lower is set in the vicinity of the vehicle width direction, and a reinforcing member side joint portion is extended in the vehicle width direction from a reinforcing member for reinforcing the attachment portion of the back door hinge. The reinforcing member side joint portion is joined to the joint portion between the header upper and the header lower.

  According to the seat belt anchor mounting structure of the third aspect, the joint portion between the header upper and the header lower is set in the vicinity of the vehicle width direction of the back door hinge that supports the back door of the vehicle so as to be capable of opening and closing up and down. Further, a reinforcing member side joint portion extends in the vehicle width direction from the reinforcing member for reinforcing the mounting portion of the back door hinge, and this reinforcing member side joint portion is a joint portion between the header upper and the header lower, together with the header upper and the header lower. Be joined.

  Thus, at the support point of the seat belt anchor, not only the header upper and header lower are joined, but also the reinforcing member side joint extending from the reinforcing member in the vehicle width direction is joined. The joint portion is set in the vicinity of the back door hinge in the vehicle width direction. For this reason, the joint strength between the header upper and the header lower can be further improved without increasing the number of parts, and local deformation of the vehicle body structural material in this portion can be prevented or suppressed.

  As described above, in the seat belt anchor mounting structure according to the first aspect of the present invention, with respect to the tensile load input to the vehicle body structural material via the seat belt anchor without taking any special measures, The bonding strength between the first structural material and the second structural material can be secured.

  In the seat belt anchor mounting structure according to the second aspect, the support point of the seat belt anchor can be separated from the occupant to the rear side, and the distance between the occupant and the seat belt anchor can be secured.

  In the seatbelt anchor mounting structure according to claim 3, it is possible to further improve the bonding strength between the first structural material and the second structural material without particularly increasing the number of parts, and to prevent local deformation of the vehicle body structural material in this portion or Can be suppressed.

It is the perspective view which looked at the rear seat of the vehicle with which the seatbelt anchor was attached by the seatbelt anchor attachment structure which concerns on this Embodiment from the diagonally left front. It is the perspective view which looked at the rear part of the vehicle with which the seatbelt anchor was attached by the seatbelt anchor attachment structure which concerns on this Embodiment from diagonally right back. It is side surface sectional drawing to which the supporting point of the seatbelt anchor and its vicinity were expanded. It is the back sectional view which expanded the support point of a seatbelt anchor, and its neighborhood.

  Next, an embodiment of the present invention will be described with reference to FIGS. It should be noted that an arrow FR appropriately shown in each figure indicates the front of the vehicle to which the corresponding embodiment is applied, an arrow UP indicates the upper side of the vehicle to which the corresponding embodiment is applied, and an arrow RH is the corresponding embodiment. The right side of the width direction of the vehicle to which this form is applied is shown.

<Configuration of the present embodiment>
FIG. 1 is a schematic perspective view of a vehicle 12 to which a seat belt device 10 is attached by a seat belt anchor attachment structure according to the present embodiment. The seat belt device 10 includes a retractor 14. The retractor 14 is provided behind the right rear seat 16 and is fastened and fixed to a retractor mounting portion set on the inner rear panel 18 constituting the vehicle body of the vehicle 12 by fastening means such as a bolt.

  The retractor 14 is rotatably provided with a winding shaft whose rotational axis direction is substantially along the longitudinal direction of the vehicle, and a longitudinal base end portion of the webbing 20 formed in a long strip shape on the winding shaft. It has been stopped. The webbing 20 is drawn upward from the winding shaft of the retractor 14 along the inner rear panel 18. Above the retractor 14, a slip joint 22 is attached to the inner rear panel 18 with bolts or the like. A slit hole 24 is formed in the slip joint 22, and the webbing 20 passes through the slit hole 24.

  The webbing 20 that has passed through the slit hole 24 of the slip joint 22 is supported by the inner peripheral portion of the slit hole 24, and the webbing 20 is further inward in the vehicle width direction (leftward in the vehicle left-right direction) from the support position in the inner peripheral portion of the slit hole 24. ) And in an inclined direction upward of the vehicle. A slip joint 26 corresponding to a seat belt anchor according to the present invention is provided near the ceiling of the vehicle 12 corresponding to the webbing 20 extending from the slit hole 24 of the slip joint 22.

  Here, FIG. 2 shows the vicinity of the portion where the slip joint 26 is provided by a perspective view from the right rear side of the vehicle 12, and FIG. 3 shows the vicinity of the portion where the slip joint 26 is provided enlarged. A side sectional view is shown, and FIG. 4 is an enlarged rear sectional view showing the vicinity of a portion where the slip joint 26 is provided.

  As shown in these drawings, the slip joint 26 is attached to a rear header 40 constituting a vehicle body structural material as a skeleton member (beam member) of the vehicle body of the vehicle 12. The rear header 40 is provided below the roof panel 42 so as to extend in the vehicle width direction along the rear end portion of the roof panel 42, and both longitudinal ends thereof are integrally connected to the roof side rail by welding or the like. ing.

  The rear header 40 includes a header lower 44 as a second structural material. The header lower 44 includes a plate-like front wall portion 46 whose thickness direction is generally along the vehicle longitudinal direction and whose width direction is generally along the vehicle vertical direction. A plate-like flange portion 48 extends from the upper end of the front wall portion 46 toward the front of the vehicle along the roof panel 42. On the other hand, a plate-like lower wall portion 50 extends obliquely rearward and downward from the lower end of the front wall portion 46, and further, the rear end portion of the lower wall portion 50 (of the lower wall portion 50). A flange portion 52 extends toward the rear of the vehicle from an end portion opposite to the flange portion 48).

  On the upper side of the header lower 44 described above, a header upper 62 as a first structural material is provided. The header upper 62 includes a plate-like rear wall portion 64 whose thickness direction is approximately along the vehicle longitudinal direction and whose width direction is generally along the vehicle vertical direction. The rear wall portion 64 is opposed to the rear wall portion 64 behind the front wall portion 46, and a plate-like upper wall portion 66 extends from the upper end toward the front of the vehicle along the header lower 44. The joint 68 extends continuously from the front end of the upper wall portion 66. The joint portion 68 is opposed to the flange portion 48 on the upper side of the flange portion 48, and the joint portion 68 and the flange portion 48 are integrally joined by welding means such as spot welding.

  On the other hand, a flange portion 70 as a predetermined portion of the first structural member extends from the lower end of the rear wall portion 64 toward the rear of the vehicle. The flange portion 70 faces the flange portion 52 on the upper side of the flange portion 52, and the flange portion 70 and the flange portion 52 are integrally joined by welding means such as spot welding. As described above, the joint portion 68 and the flange portion 48 are integrally joined and the flange portion 70 and the flange portion 52 are integrally joined, so that the rear header 40 has the front wall portion 46 and the lower wall portion 50. A closed cross-sectional shape constituted by the rear wall portion 64 and the upper wall portion 66 is formed.

  Further, a back door hinge bracket 82 as a reinforcing member is provided between the header lower 44 and the header upper 62. The back door hinge bracket 82 is a plate-like member that is appropriately bent, and is provided on both ends of the rear header 40 in the longitudinal direction. In the vehicle width direction outer side of the vehicle width direction intermediate portion of the back door hinge bracket 82, the rear door side is inclined so that the rear end side is positioned below the front end side of the back door hinge bracket 82. A reinforcing member side joint 84 is set at the front end. The reinforcing member side joint portion 84 is sandwiched between the joint portion 68 and the flange portion 48 and is joined together with the joint portion 68 and the flange portion 48 in this state. On the other hand, a reinforcing member side joint 86 is set at the rear end of the back door hinge bracket 82. The reinforcing member side joining portion 86 is sandwiched between the flange portion 70 and the flange portion 52 and joined together with the flange portion 70 and the flange portion 52 in this state.

  Further, a fixing portion 88 is formed on the back door hinge bracket 82 on the inner side in the vehicle width direction than the reinforcing member side joining portion 86. The fixed portion 88 is formed in a hat shape in cross section that protrudes upward as a whole and opens downward. The fixing portion 88 has an upper wall portion 90. The upper wall 90 has a plate shape whose thickness direction is along the vehicle vertical direction.

  A slant wall 92 is formed continuously from the outer end of the upper wall 90 in the vehicle width direction. The inclined wall portion 92 extends from the outer end portion in the vehicle width direction of the upper wall portion 90 in a direction inclined in the vehicle width direction outward and downward of the vehicle, and the tip thereof is connected to the reinforcing member side joint portion 86. On the other hand, the inclined wall portion 94 is continuously formed from the inner wall direction end of the upper wall portion 90. The inclined wall portion 94 extends from the inner end portion in the vehicle width direction of the upper wall portion 90 in an inward direction in the vehicle width direction and inclined downward in the vehicle. A joining portion 96 extends inward in the vehicle width direction along the flange portion 52 from the tip of the inclined wall portion 94, and the joining portion 96 and the flange portion 52 are integrally joined by welding or the like.

  The flange portion 70 of the header upper 62 is bent so as to follow the inclined wall portion 92 and the upper wall portion 90 in the vehicle width direction, and at a portion where the flange portion 70 faces the upper wall portion 90 in the vehicle vertical direction, The flange portion 70 is sandwiched between the upper wall portion 90. A back door hinge 102 is provided on the upper side of the roof panel 42 corresponding to the upper wall portion 90. The back door hinge 102 has one or more bolts 104 passing through the bottom wall. These bolts 104 further penetrate the roof panel 42, the flange portion 70, and the upper wall portion 90 of the fixing portion 88, and a nut is screwed from the lower side of the upper wall portion 90. In this way, the back door hinge 102 fastened and fixed to the roof panel 42 by the bolt 104 rotates the back door (not shown) of the vehicle 12 about an axis whose center is the vehicle width direction around the upper end. (Opening and closing movement) is possible.

  The above-described slip joint 26 is disposed below the flange portion 52 located on the side of the fixing portion 88 where the back door hinge 102 is attached. An anchor bolt 106 penetrates from the lower side of the slip joint 26. The anchor bolt 106 further passes through the flange portion 52, the reinforcing member side joint portion 86, and the flange portion 70, and is screwed into a nut 108 provided on the upper side of the flange portion 70. Thereby, the slip joint 26 is attached to the lower side of the flange portion 52 (that is, a support point of the slip joint 26 is set at a joint portion between the flange portion 52 and the flange portion 70).

  The webbing 20 that has passed through the slit hole 24 of the slip joint 22 passes through the slit hole 110 formed in the slip joint 26. The webbing 20 that has passed through the slit hole 110 of the slip joint 26 is supported by the inner periphery of the slit hole 110, and the webbing 20 extends downward from the support position at the inner periphery of the slit hole 110 and is provided below the rear header 40. The roof head lining 112 extends through the hole 114 into the vehicle 12. The webbing 20 extending into the interior of the vehicle 12 passes through a gap between the central rear seat 116 and the right rear seat 16 provided on the inner side in the vehicle width direction of the right rear seat 16. And an anchor plate fixed to the vehicle body on the lower side of the central rear seat 116.

  A tongue plate 118 is provided in a portion of the webbing 20 that is located on the indoor side of the vehicle 12, and the right rear seat of the central rear seat 116 with an occupant seated on the central rear seat 116 hanging around the body. When the tongue plate 118 is attached to a buckle (not shown) provided on the side opposite to the side 16, the webbing 20 is attached to the occupant's body.

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

  As described above, in the seat belt device 10 mounted on the vehicle 12, the slip joint 26 is supported by the anchor bolt 106 that penetrates the joint portion between the flange portion 70 of the header upper 62 and the flange portion 52 of the rear header 40 in the rear header 40. Is done. For example, when the vehicle decelerates rapidly, the occupant's body attempts to move inertially toward the front side of the vehicle, and when the occupant's body pulls the webbing 20, the slip joint 26 is pulled by the webbing 20. The slip joint 26 to which such a pulling force is applied pulls the head of the anchor bolt 106.

  When the anchor bolt 106 is pulled by the slip joint 26, the nut 108 screwed to the anchor bolt 106 in this pulling direction presses the flange portion 70. For this reason, even if the slip joint 26 is pulled, the pulling force applied to the slip joint 26 does not act as a peeling load that peels off the flange portion 52 from the flange portion 70. Thus, the flange portion 52 or the flange portion 70 can be made thicker without special measures such as increasing the plate thickness or increasing the number of welding points for joining the flange portion 52 and the flange portion 70. The bonding strength between the flange portion 70 and the flange portion 70 can be ensured.

  As described above, since the joint strength between the flange portion 52 and the flange portion 70 can be ensured, in the present embodiment, even when the above pulling force is input to the slip joint 26, the front wall portion 46 and the lower wall portion. 50, the rear wall portion 64, and the upper wall portion 66 can be maintained in a closed cross-sectional shape, and high beam rigidity of the rear header 40 having the closed cross-sectional shape can be secured.

  Further, an attachment site (support point) of the slip joint 26 is set to the side of the fixing portion 88 in the back door hinge bracket 82 provided between the header lower 44 and the header upper 62 constituting the rear header 40, and the slip joint 26 is attached. Between the flange portion 52 of the header lower 44 and the flange portion 70 of the header upper 62, the reinforcing member side joint portion 86 of the back door hinge bracket 82 is sandwiched, and the reinforcing member side joint portion 86 is joined together with the flange portion 52 and the flange portion 70. Is done.

  For this reason, the joint strength with respect to the tensile force applied to the slip joint 26 can be further increased, and local deformation of the rear header 40 resulting from the input of the tensile force to the slip joint 26 can be effectively prevented or suppressed. In addition, since the back door hinge bracket 82 is a member used as a reinforcing material for attaching the back door hinge 102, the number of parts is not particularly increased when the bonding strength between the flange portion 52 and the flange portion 70 is supplemented.

  Further, in the present embodiment, the flange portion 52 and the flange portion 70 that are set on the rear side of the front wall portion 46, the lower wall portion 50, the rear wall portion 64, and the upper wall portion 66 that form a closed cross-sectional shape are joined. The attachment site (support point) of the slip joint 26 is set in the portion. This portion is a portion where the plate-like flange portion 52, the flange portion 70, and the reinforcing member side joint portion 86 of the back door hinge bracket 82 are simply overlapped. For this reason, compared with the structure which sets the attachment site | part (support point) of the slip joint 26 in the site | part which comprises the closed cross-sectional shape in the rear header 40, attachment of the anchor bolt 106 and screwing of the nut 108 with respect to the nut 108 are performed easily. The slip joint 26 can be easily attached.

  In addition to the joint portion between the flange portion 52 and the flange portion 70, the header lower 44 and the header upper 62 are joined by joining the flange portion 48 of the header lower 44 and the joint portion 68 of the header upper 62. The joint 26 may be attached.

  However, the flange portion 48 of the header lower 44 and the joint portion 68 of the header upper 62 are set on the front side of the front wall portion 46, the lower wall portion 50, the rear wall portion 64, and the upper wall portion 66 that form a closed cross-sectional shape (that is, It is located in front of the joint portion between the flange portion 52 and the flange portion 70). For this reason, by setting the attachment position of the slip joint 26 at the joint portion between the flange portion 52 and the flange portion 70, the attachment position of the slip joint 26 is set at the joint portion between the flange portion 48 and the joint portion 68. In addition, the distance between the seating position of the occupant along the vehicle longitudinal direction and the mounting position of the slip joint 26 can be set wide, and the restraining performance of the occupant's body by the webbing 20 can be enhanced.

  As described above, in the present embodiment, the attachment position (support point) of the slip joint 26 is set to the front wall portion 46, the lower wall portion 50, the rear wall portion 64, and the upper wall constituting the closed cross-sectional shape of the rear header 40. The flange portion 52 and the flange portion 70 which are set on the rear side of the portion 66 are set at the joint portion.

  However, from the viewpoint of the present invention described in claim 1, the flange of the header lower 44 set on the front side of the front wall portion 46, the lower wall portion 50, the rear wall portion 64, and the upper wall portion 66. The attachment position (support point) of the slip joint 26 may be set at the joint portion between the portion 48 and the joint portion 68 of the header upper 62, or the header lower 44 and the header upper 62 may be located at a portion constituting the closed cross-sectional shape of the rear header 40. If the joint portion is set, the attachment position (support point) of the slip joint 26 may be set at a portion where the header lower 44 and the header upper 62 are joined in the portion constituting the closed cross-sectional shape.

  Further, in the present embodiment, the rear header 40 that constitutes the skeleton of the vehicle body on the rear end side of the vehicle 12 is the “vehicle body component”, but the “vehicle body component” is not limited to the rear header 40 and is closed. If it has a cross-sectional shape, the roof side rail may be used as a “body component” to set the support points for the seat belt anchors such as the slip joint 26, or the reinforcing material such as the roof reinforcement may be The support point of the seat belt anchor such as the slip joint 26 may be set as the “material”.

  In the present embodiment, the slip joint 26 through which the intermediate portion of the webbing 20 passes is a “seat belt anchor”, but the anchor plate to which the tip of the webbing 20 is locked is a “seat belt anchor”. You may apply this invention to support of a plate.

10 Seat Belt Device 12 Vehicle 20 Webbing 26 Slip Joint (Seat Belt Anchor)
40 Rear header (body structure)
44 Header lower (second structural material)
62 Header upper (first structural material)
82 Back door hinge bracket (reinforcement member)
86 Reinforcement member side joint 102 Back door hinge 106 Anchor bolt (support means)

Claims (3)

A first structural material constituting the vehicle body structural material;
A second structural material which is joined to the first structural material so as to form a closed cross-sectional shape together with the first structural material, and constitutes the vehicle body structural material;
The first structural material and the second structural material penetrate through a joint portion, and are provided on the side opposite to the other structural material in one of the first structural material and the second structural material. Anchor bolts that support the seat belt anchor;
Seat belt anchor mounting structure. A header upper that is provided so as to extend in the vehicle width direction along the rear end of the ceiling of the vehicle and constitutes a rear header as a vehicle body structural material is the first structural material,
A header lower which is provided so as to extend in the vehicle width direction below the header upper and constitutes a rear header together with the header upper is the second structural material,
The seat belt anchor mounting structure according to claim 1, wherein the closed cross-sectional shape is formed in a middle portion in the front-rear direction of the rear header, and the anchor bolt is provided on the rear side of the closed cross-sectional shape.   A joint portion between the header upper and the header lower is set in the vicinity of the vehicle width direction in a back door hinge that supports a back door provided at the rear end portion of the vehicle so that the back door can be opened and closed up and down, and an attachment portion of the back door hinge is provided. The seat belt anchor according to claim 2, wherein a reinforcing member side joint portion is extended from the reinforcing member for reinforcing in the vehicle width direction, and the reinforcing member side joint portion is joined to a joint portion between the header upper and the header lower. Mounting structure.

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