JP4669015B2 - Vehicle seat belt device - Google Patents

Description

  The present invention relates to a vehicle seat belt device in which an anchor is provided via an anchor bracket at a roof side corner portion of a vehicle body, and a webbing is supported by the anchor.

In a vehicle seat belt device, an anchor bracket (impact absorbing member) is provided on an inner member of a center pillar, an anchor rail is provided on the anchor bracket with a bolt, and an anchor is provided on the anchor rail with an anchor bolt. Some anchors are configured to support webbing. (For example, refer to Patent Document 1).
Japanese Patent No. 3498879

The anchor bracket of Patent Document 1 is formed so as to be along the back surface of the inner member, and a bent portion having a substantially U-shaped cross section that protrudes outside the vehicle body between the center portion and the upper end portion and between the center portion and the lower end portion. Each is formed.
The upper and lower end portions are attached to the back surface of the inner member, and the central portion is attached to the bolt.
According to this anchor bracket, when an impact is applied to the anchor bolt, the bent portion can be deformed to absorb the impact.

Here, the anchor bracket of Patent Document 1 includes upper and lower end portions attached to the inner member, a center portion attached to the bolt, and a pair of bent portions that absorb impact.
In this way, since the anchor bracket is constituted by a large number of parts, the entire length of the anchor bracket becomes long.

Therefore, this anchor bracket can be attached to a member such as a center pillar that can ensure a long space.
However, some parts of the vehicle body cannot secure a long space, such as the roof-side corner portion at the rear of the vehicle body. For this reason, it has been considered difficult to attach an anchor bracket to the roof corner where a long space cannot be secured.

  An object of the present invention is to provide a vehicle seat belt device including an anchor bracket that can be attached to a roof-side corner portion at the rear of a vehicle body and that can absorb shocks.

  The invention according to claim 1 is a vehicle seat belt device in which an anchor bracket is provided at a roof-side corner portion of a vehicle body, an anchor is provided on the anchor bracket via an anchor bolt, and a webbing is supported by the anchor. The anchor bracket includes a vertical wall portion extending downward from a vehicle body, an inclined wall portion extending from a lower end portion of the vertical wall portion and provided with the anchor bolt, and the inclined wall portion. And a pair of attachment portions each provided on the vertical wall portion and attached to the vehicle body, wherein the vertical wall portion and the inclined wall portion are bent at an acute angle and formed in a substantially V shape. Features.

  The invention according to claim 2 is characterized in that the vertical wall portion is provided with a concave vertical bead as a reinforcing portion.

In the invention which concerns on Claim 1, the anchor bracket was comprised with the vertical wall part, the inclination wall part, and a pair of attaching part. And the anchor bolt was provided in the inclined wall part, and the anchor was provided in the anchor bolt.
Therefore, the part which comprises an anchor bracket can be restrained few compared with the anchor bracket of a prior art.
Further, the vertical wall portion and the inclined wall portion were formed in a substantially V shape. Therefore, a vertical wall part and an inclined wall part can be put together compactly.

In this way, the total length of the anchor bracket can be kept short by suppressing the number of parts that constitute the anchor bracket and compactly combining the vertical wall portion and the inclined wall portion.
Thereby, there exists an advantage that an anchor bracket can be attached to the site | part which cannot ensure long space like the roof side corner part of a vehicle body rear part.

Furthermore, in the invention according to claim 1, the anchor bracket is formed in a substantially V shape by bending the vertical wall portion and the inclined wall portion at an acute angle.
Then, an anchor bolt is provided on the inclined wall portion, and the webbing is supported on the anchor bolt via the anchor.

Therefore, when an impact load is applied to the anchor bolt, the impact load can be applied in a direction intersecting the vertical wall portion.
Thereby, there exists an advantage that a vertical wall part can be suitably deform | transformed with the applied impact load, and an impact load can be absorbed favorably.

In the invention which concerns on Claim 2, the concave vertical bead was provided in the vertical wall part as a reinforcement part.
Thereby, it is possible to favorably secure the rigidity of the vertical wall portion by adjusting the depth dimension of the vertical bead.

That is, by adjusting the depth dimension of the vertical bead, it is possible to suitably ensure the rigidity of the vertical wall portion so as to prevent the deformation of the vertical wall portion when a tensile load acts on the webbing.
Thereby, there exists an advantage that webbing can be favorably supported with an anchor bracket.

On the other hand, by adjusting the depth dimension of the vertical bead, it is possible to suitably secure the rigidity of the vertical wall portion so that the vertical wall portion is deformed when an impact load is applied to the anchor bracket.
Thereby, there exists an advantage that the impact load which acted on the anchor bracket can be favorably absorbed by the anchor bracket.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. Note that “front”, “rear”, “left”, and “right” indicate the direction viewed from the driver, the front side is Fr, the rear side is Rr, the left side is L, and the right side is R.

FIG. 1 is a plan view showing a vehicle including a vehicle seat belt device according to the present invention.
The vehicle 10 is provided with a first row seat (not shown) at the front portion of the vehicle compartment 12 of the vehicle body 11, and a second row seat 13 is provided behind the vehicle body of the first row seat. A third row seat 14 is provided at the rear of the vehicle body, and a vehicle seat belt device 15 used for the third row seat 14 is provided.
The vehicle seat belt device 15 is used, for example, to restrain an occupant seated on the third row seat 14.

The vehicle seat belt device 15 includes an anchor means 22 provided at a roof corner portion (roof side corner portion) 21 on the left side of the rear portion of the vehicle body 11, a first webbing (webbing) 23 connected to the anchor means 22, A buckle 24 provided on one webbing 23, a tongue 25 detachably provided on the buckle 24, a second webbing (webbing) 26 connected to the tongue 25, and a winding device to which the second webbing 26 is connected 27.
The winding device 27 is attached (provided) on the right side portion 28 of the third row seat 14 in the vehicle body 11 and in the vicinity of the floor portion.

2 is a perspective view showing the anchor means of the vehicle seat belt device according to the present invention, and FIG. 3 is a sectional view taken along line 3-3 of FIG.
In FIG. 2, the anchor cover 31 and the roof lining 32 are removed in order to facilitate understanding of the configuration of the anchor means 22.

The roof corner portion 21 is connected so that the rear end portion 34a of the left roof side rail 34 provided on the left side of the vehicle body 11 and the upper end portion 35a of the left rear pillar 35 provided on the left side of the vehicle body 11 intersect. It is a part.
Since the roof corner portion 21 is connected so that the rear end portion 34a of the left roof side rail 34 and the upper end portion 35a of the left rear pillar 35 intersect each other, a long space cannot be secured.

The left roof side rail 34 is an aggregate formed in a closed cross section by a roof outer panel (not shown) and a roof inner panel 37.
The left rear pillar 35 includes a rear pillar inner panel 38.
The rear pillar inner panel 38 has a recessed portion 41 that is recessed upward in the vicinity of the rear end portion 37a of the roof inner panel 37.
The recess 41 is formed in a substantially U-shaped cross section at the peripheral wall 42 and the top 43 (see FIG. 3).

The rear end portion 37a of the roof inner panel 37 is joined to the upper front end portion (a portion of the top 43 on the vehicle body front side) 38a by spot welding.
A pair of first mounting holes 45 (see also FIG. 4) are formed in the rear end portion 37a of the roof inner panel 37.
A pair of second mounting holes 46 (only one of which is shown) are formed in the upper front end portion 38 a of the rear pillar inner panel 38.

A rear end portion 47a of the roof rail extension 47 and a rear end portion 48a of the roof panel 48 are integrally joined to the top portion 43 of the rear pillar inner panel 38 by spot welding.
A pair of third mounting holes 51 (see FIG. 4) is formed in the top 43 of the rear pillar inner panel 38.

A pair of fourth mounting holes 52 (only one is shown) are formed in the rear end portion 47 a of the roof rail extension 47.
A pair of fifth mounting holes 53 (only one of which is shown) is formed in the rear end portion 48 a of the roof panel 48.

The first mounting hole 45 of the roof inner panel 37 and the second mounting hole 46 of the rear pillar inner panel 38 are coaxially arranged.
Further, the third mounting hole 51 of the rear pillar inner panel 38, the fourth mounting hole 52 of the roof rail extension 47, and the fifth mounting hole 53 of the roof panel 48 are arranged coaxially.
The anchor means 22 is attached to the roof corner portion 21 by using the first and second attachment holes 45, 46, and the third to fifth attachment holes 51, 52, 53, and so on.

FIG. 4 is an exploded perspective view showing the anchor means of the vehicle seat belt apparatus according to the present invention, and FIG. 5 is a perspective view showing the anchor bracket of the anchor means according to the present invention.
The anchor means 22 includes an anchor bracket 55 provided on the roof corner portion 21, an anchor nut 56 provided on the anchor bracket 55, an anchor bolt 57 provided on the anchor nut 56, and a bush 58 (see FIG. 3). ) And an anchor cover 31 (see FIG. 3) that covers the anchor bolt 57 and the anchor 59.

The anchor bracket 55 is a member formed by bending a flat plate into a substantially V shape.
The anchor bracket 55 includes a vertical wall portion 61 that extends substantially vertically toward the lower side of the vehicle body, an inclined wall portion 62 that extends upward from the lower end portion 61a of the vertical wall portion 61, and an inclined wall portion 62. A front mounting portion (one of the pair of mounting portions) 63 and a rear mounting portion (the other mounting portion of the pair of mounting portions) 64 provided on the vertical wall portion 61. ing.

The vertical wall portion 61 is formed in a substantially rectangular shape, and a vertical bead 66 extending in the vertical direction at the center portion is formed as a reinforcing portion. The vertical bead 66 is a portion that is recessed to a depth dimension D (see also FIG. 3) toward the rear of the vehicle body.
The vertical wall 61 can suitably ensure the rigidity of the vertical wall 61 by adjusting the depth dimension D of the vertical bead 66.

Therefore, by adjusting the depth dimension D of the vertical bead 66, when the tensile load is applied to the first webbing 23, the rigidity of the vertical wall portion 61 is suitably ensured so as to prevent the deformation of the vertical wall portion 61. It is possible.
Thereby, the first webbing 23 can be favorably supported by the anchor means 22.

On the other hand, by adjusting the depth dimension D of the vertical bead 66, the rigidity of the vertical wall portion 61 is suitably adjusted so that the vertical wall portion 61 is deformed when an impact load is applied to the anchor cover 31 shown in FIG. It is possible to secure.
Thereby, the impact load applied to the anchor cover 31 can be satisfactorily absorbed by the anchor means 22.

The inclined wall portion 62 is a portion extending from the lower end portion 61 a of the vertical wall portion 61 with an upward gradient of the inclination angle θ. The inclination angle θ is set to an acute angle.
Therefore, the inclined wall portion 62 and the vertical wall portion 61 are bent into an acute angle θ and formed in a substantially V shape.

The inclined wall portion 62 has an opening 67 formed substantially at the center. An anchor nut 56 projects from the opening 67 toward the vehicle compartment 12, and a base 72 of the anchor nut 56 is joined to the back surface 62a (see FIG. 3) of the inclined wall portion 62 by spot welding.
Accordingly, the anchor nut 56 is provided on the inclined wall portion 62.

The front mounting portion 63 is a portion that protrudes from the front end portion 62 b of the inclined wall portion 62 toward the front of the vehicle body.
As for this front attachment part 63, the step part 74 is formed in the both sides 63a, respectively, and the front attachment holes 74a and 74a are formed in each step part 74 and 74, respectively.

  The step portions 74 and 74 of the front mounting portion 63 are brought into contact with the rear end portion 37a of the roof inner panel 37, and the front mounting holes 74a and 74a are connected to the first mounting holes 45 and 45 and the second mounting holes 46 and 46 (FIG. 3). (Only one is shown in the figure).

Bolts 76, 76 (only one of which is shown) are inserted into the front mounting holes 74a, 74a, the first mounting holes 45, 45, and the second mounting holes 46, 46, and are projected from the second mounting holes 46, 46. Nuts 78 and 78 are screwed to the portions 76a and 76a.
Therefore, the front attachment portion 63 is attached to the rear end portion 37 a of the roof inner panel 37 with the bolts 76 and 76 and the nuts 78 and 78.

The rear attachment portion 64 is a portion that protrudes from the upper end portion 61 b of the vertical wall portion 61 toward the rear of the vehicle body.
The rear mounting portion 64 has rear mounting holes (long holes) 78 and 78 formed on both side portions 64a and 64a, respectively.

  The rear mounting portion 64 is brought into contact with the top portion 43 (see FIG. 3) of the rear pillar inner panel 38, and the rear mounting holes 78 and 78 have third mounting holes 51 and 51 and fourth mounting holes 52 and 52 (only one in FIG. 3). And the fifth mounting holes 53, 53 (only one is shown in FIG. 3).

The welding bolts 81, 81 are inserted into the rear mounting holes 78, 78, the third mounting holes 51, 51, the fourth mounting holes 52, 52, and the fifth mounting holes 53, 53, and project from the fifth mounting holes 53, 53. Nuts 82 and 82 (only one of which is shown) are screwed to the threaded portions 81a and 81a.
Therefore, the rear attachment portion 64 is attached to the top portion 43 (see FIG. 3) of the rear pillar inner panel 38 with the welding bolts 81 and 81 and the nuts 82 and 82.

  Thus, the front mounting portion 63 is mounted to the rear end portion 37a of the roof inner panel 37 with the bolts 76 and 76 and the nuts 78 and 78, and the rear mounting portion 64 is welded to the top portion 43 of the rear pillar inner panel 38 with the welding bolts 81 and 81 and The anchor bracket 55 is provided on the roof corner portion 21 by attaching with the nuts 82 and 82.

In this state, when the vehicle 10 shown in FIG. 1 collides, it is conceivable that an impact load acts on the lower end portion 61a of the anchor bracket 55 in the arrow direction.
When the impact load is applied to the lower end portion 61a, the vertical wall portion 61 is deformed so that the inclined wall portion 62 of the anchor bracket 55 rotates in the arrow direction (that is, counterclockwise) around the front end portion 62b. To do.

The anchor nut 56 includes a cylindrical portion 71 projecting from the opening 67 of the inclined wall portion 62 toward the vehicle compartment 12, and a base portion 72 provided at the proximal end portion of the cylindrical portion 71.
As for the cylinder part 71, the internal thread part 71a is formed in the inner periphery of a through-hole. The base portion 72 is a portion joined to the back surface 62a (see FIG. 3) of the inclined wall portion 62 by spot welding.

The anchor nut 56 and the anchor bracket 55 are covered with a roof lining 32 (see FIG. 3) so as not to be seen from the vehicle compartment 12 side.
The roof lining 32 is a lining that forms the ceiling of the vehicle compartment 12.

A threaded portion 57 a of an anchor bolt 57 is screwed to the anchor nut 56.
Returning to FIG. 3, the anchor bolt 57 is provided with first and second flanges 57 c and 57 d at a predetermined interval between the screw portion 57 a and the head portion 57 b.

Between the first and second flanges 57c and 57d, an anchor 59 is rotatably provided via a bush 58.
The anchor 59 has a support opening 59a, and the first webbing 23 is inserted into the support opening 59a.
Therefore, the first webbing 23 is supported by the anchor 59.

The anchor cover 31 is a member in which the engagement hole 85 of the base portion 31 a is engaged with the anchor bolt 57 and the cover portion 31 b covers the anchor bolt 57 and the anchor 59.
By covering the anchor bolt 57 and the anchor 59 with the cover portion 31b, the anchor bolt 57 and the anchor 59 can be hidden from the eyes of the occupant.

As described above, the anchor bracket 55 is composed of the vertical wall portion 61, the inclined wall portion 62, and the front and rear attachment portions 63 and 64.
An anchor bolt 57 is provided on the inclined wall portion 62, and an anchor 59 is provided on the anchor bolt 57.

Therefore, the site | part which comprises the anchor bracket 55 can be restrained few compared with the anchor bracket of a prior art.
Furthermore, the vertical wall part 61 and the inclined wall part 62 were formed in a substantially V shape. Therefore, the vertical wall part 61 and the inclined wall part 62 can be put together compactly.

  In this way, the total length of the anchor bracket 55 can be kept short by suppressing the parts constituting the anchor bracket 55 to be small and collecting the vertical wall portion 61 and the inclined wall portion 62 in a compact manner.

Here, as described above, the roof corner portion 21 is connected so that the rear end portion 34a of the left roof side rail 34 and the upper end portion 35a of the left rear pillar 35 intersect each other. For this reason, the roof corner portion 21 is a portion where a long space cannot be secured.
However, by keeping the total length of the anchor bracket 55 short, the anchor bracket 55 can be easily provided (attached) at a site where a long space cannot be secured, such as the roof corner portion 21.

Next, an example in which a tensile load acts on the first webbing 23 of the vehicle seat belt device 15 will be described in detail with reference to FIG.
FIG. 6 is a view for explaining an example in which a tensile load acts on the webbing of the vehicle seat belt device according to the present invention.
For example, when the vehicle 10 collides, it can be considered that the tensile load F <b> 1 acts on the first webbing 23.
This tensile load F1 acts on the inclined wall portion 62 of the anchor bracket 55 via the anchor 59, the anchor bolt 57, and the anchor nut 56.

A part of the tensile load F1 acting on the inclined wall portion 62 acts on the front mounting portion 63 as the tensile load F2.
Here, the front mounting portion 63 projects substantially linearly with respect to the inclined wall portion 62. Therefore, the tensile load F2 can be favorably supported by the front mounting portion 63.

On the other hand, the remainder of the tensile load F1 acts on the lower end portion 61a side of the vertical wall portion 61 as the tensile load F3.
Here, the inclined wall portion 62 and the vertical wall portion 61 are bent into an approximately V shape at an acute angle θ (see FIG. 5).

Therefore, when the tensile load F <b> 3 acts on the lower end portion 61 a side of the vertical wall portion 61, the tensile load F <b> 3 acts in a direction intersecting the vertical wall portion 61.
Thereby, the tensile load F3 acts on the vertical wall portion 61 as a bending load.
For this reason, it is conceivable that the vertical wall portion 61 bends and deforms relatively easily with the upper end portion 61b of the vertical wall portion 61 as a fulcrum with the applied tensile load F3.

Therefore, the rigidity of the vertical wall portion 61 is suitably secured (adjusted) by adjusting the depth dimension D of the reinforcing vertical bead 66 provided in the vertical wall portion 61.
Therefore, by adjusting the depth dimension D of the vertical bead 66, it is possible to prevent the vertical wall portion 61 from being bent and deformed by the tensile load F3.

Thus, the tensile load F3 can be favorably supported by the vertical wall portion 61 by preventing the vertical wall portion 61 from being bent and deformed.
Thereby, when the vehicle 10 collides, the 1st webbing 23 can be favorably supported by the anchor means 22.

Next, an example in which an impact load acts on the anchor cover 31 of the vehicle seat belt device 15 will be described in detail with reference to FIG.
FIGS. 7A and 7B are diagrams illustrating an example in which an impact load is applied to the anchor cover of the vehicle seat belt device according to the present invention.
In (a), for example, when the vehicle 10 collides, it is conceivable that the impact load F4 acts on the anchor cover 31.
The anchor cover 31 is deformed and comes into contact with the head 57b of the anchor bolt 57. Therefore, the impact load F4 is transmitted to the head 57b of the anchor bolt 57 through the anchor cover 31.

A part of the impact load F4 transmitted to the head portion 57b of the anchor bolt 57 acts on the lower end portion of the inclined wall portion 62 (that is, the lower end portion 61a of the vertical wall portion 61) as the impact load F5.
Here, the inclined wall portion 62 and the vertical wall portion 61 are bent into an approximately V shape at an acute angle θ (see FIG. 5).

Therefore, when the impact load F <b> 5 acts on the lower end portion 61 a of the vertical wall portion 61, the impact load F <b> 5 acts in a direction intersecting the vertical wall portion 61.
Thereby, the impact load F5 acts on the vertical wall portion 61 as a bending load.
That is, the impact load F5 acts as a load that relatively easily bends and deforms the vertical wall 61 with the upper end 61b of the vertical wall 61 as a fulcrum.

On the other hand, the vertical wall portion 61 is provided with a vertical bead 66 for reinforcement.
Since the vertical bead 66 is provided in the vertical wall portion 61, there is a possibility that the vertical wall portion 61 cannot be bent and deformed even if the impact load F5 acts on the lower end portion 61a of the vertical wall portion 61.

The vertical wall portion 61 can be adjusted in rigidity by adjusting the depth dimension D of the vertical bead 66.
That is, the vertical wall portion 61 is suitably secured (adjusted) so that the vertical dimension of the vertical bead 66 is adjusted and the vertical wall portion 61 is bent and deformed by the impact load F5.

Therefore, when the impact load F5 acts in a direction intersecting the vertical wall portion 61, the vertical wall portion 61 starts bending deformation.
Accordingly, the inclined wall portion 62 starts to rotate counterclockwise about the front end portion 62b of the inclined wall portion 62 as an axis.

In (b), the vertical wall portion 61 is bent and deformed, and the inclined wall portion 62 rotates counterclockwise about the front end portion 62 b of the inclined wall portion 62.
Thereby, the impact load F <b> 4 acting on the anchor cover 31 can be satisfactorily absorbed by the anchor means 22.

  In the above-described embodiment, the example in which the occupant of the third row seat 14 is restrained by using the vehicle seat belt device 15 is described. However, the present invention is not limited to this, and the vehicle seat belt device 15 is restrained by the wheelchair. Can also be used.

  Moreover, in the said embodiment, although the vehicle seatbelt apparatus 15 shown in FIG. 1 was illustrated as a vehicle seatbelt apparatus provided with the anchor means 22, the vehicle seatbelt apparatus provided with the anchor means 22 is shown to this. It is not limited.

  Furthermore, the shape of the roof corner portion 21, the anchor bracket 55, the anchor bolt 57, the anchor 59, the vertical wall portion 61, the inclined wall portion 62, the front and rear mounting portions 63 and 64, and the vertical bead 66 shown in the above embodiment is It is not limited to what was illustrated and can be changed as appropriate.

  INDUSTRIAL APPLICABILITY The present invention is suitable for application to an automobile provided with a vehicle seat belt device that supports a webbing via an anchor bolt and an anchor on an anchor bracket provided on a vehicle body.

It is a top view which shows the vehicle provided with the seatbelt apparatus for vehicles which concerns on this invention. It is a perspective view which shows the anchor means of the vehicle seatbelt apparatus which concerns on this invention. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. It is a disassembled perspective view which shows the anchor means of the vehicle seatbelt apparatus which concerns on this invention. It is a perspective view which shows the anchor bracket of the anchor means which concerns on this invention. It is a figure explaining the example which a tensile load acts on the webbing of the vehicle seatbelt apparatus which concerns on this invention. It is a figure explaining the example which the impact load acted on the anchor cover of the vehicle seatbelt apparatus which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 11 ... Car body, 15 ... Vehicle seatbelt apparatus, 21 ... Roof corner part (roof side corner part), 22 ... Anchor means, 23 ... 1st webbing (webbing), 26 ... 2nd webbing (webbing) 55 ... Anchor bracket, 57 ... Anchor bolt, 59 ... Anchor, 61 ... Vertical wall part, 61a ... Lower end part of vertical wall part, 62 ... Inclined wall part, 63,64 ... Front and rear mounting parts (a pair of mounting parts) , 66: vertical bead, D: depth dimension of vertical bead, θ: acute angle (inclination angle).

Claims (2)

An anchor bracket is provided on the roof side corner portion of the vehicle body, an anchor is provided on the anchor bracket via an anchor bolt, and a vehicle seat belt device that supports webbing with the anchor,
The anchor bracket is
A vertical wall portion extending downward from the vehicle body;
An inclined wall portion that extends from the lower end portion of the vertical wall portion with an upward slope and is provided with the anchor bolt;
A pair of attachment parts provided on the inclined wall part and the vertical wall part, respectively, and attached to the vehicle body,
The vehicle seat belt device, wherein the vertical wall portion and the inclined wall portion are bent at an acute angle to form a substantially V-shape.   The vehicle seat belt device according to claim 1, wherein the vertical wall portion is provided with a concave vertical bead as a reinforcing portion.

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