JP2008068755A - Mounting structure of car seat belt apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a car seat belt apparatus which improves the support balance of a retractor of a seat belt apparatus and support rigidity at the same time. <P>SOLUTION: This car seat belt apparatus is provided with a roof panel 9, a roof side rail 4 that forms a side upper portion of a car body, a rear header 10 bridging rear ends of the roof side rail 4, the retractor 18 attached to the one side portion of the rear head 10, a roof reinforcement 16 bridging both ends of a roof panel 9 in front of the rear header 10, and a retractor mounting portion formed at the side portion of the roof reinforcement 16 and attached with the retractor 18. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mounting structure for an automobile seat belt device in which a passenger in a rear central seat is restrained by a three-point seat belt device.

Conventionally, in a one-box car or a wagon type vehicle, it is known to restrain a passenger by a three-point seat belt device in order to improve the safety of a three-seat rear seat.
As a mounting structure of such a seat belt device, there are structures disclosed in Patent Document 1 and Patent Document 2.

  In the structure disclosed in Patent Document 1, a belt-like bracket is attached across a rear header extending in the vehicle width direction and a roof side rail extending in the front-rear direction, and a retractor of a seat belt device is attached to the bracket. However, since the support of the retractor has a cantilever structure, the support balance of the retractor is poor, and in addition, due to the large separation distance between the retractor and the roof side rail, sufficient support rigidity of the retractor cannot be secured. There was a problem.

  The structure disclosed in Patent Document 2 is provided with a large support bracket having a substantially trapezoidal shape in plan view connected to both a rear header extending in the vehicle width direction and a roof side rail extending in the front-rear direction. The seatbelt retractor is attached.

  However, since the support bracket is large in this conventional structure, the weight is increased and the separation distance between the retractor and the roof side rail is large. Therefore, the second bracket is fixed to the support bracket described above. The second bracket needs to be attached to the roof side rail, and there is a problem that sufficient support rigidity of the retractor cannot be secured.

JP 2000-1156 A JP 2002-331907 A

  Therefore, the present invention provides a roof rain bridge that is bridged between both ends of a roof panel in front of a rear header in a structure in which a retractor of a seat belt device is attached to one side portion of a rear header bridged between rear ends of left and right roof side rails. By providing a reinforcement and attaching the retractor of the seat belt device to the side of the roof reinforcement, the retractor is supported on the front and back of the rear header one side and the roof reinforcement side, thereby improving the support balance of the retractor In addition to the roof side rail far from the retractor, the mounting structure of the seat belt device for an automobile that can improve the support rigidity of the retractor by being attached to the side of the roof reinforcement near the retractor is provided. Objective.

An automobile seat belt device mounting structure according to the present invention includes a roof panel, left and right roof side rails forming the upper side of a vehicle body, a rear header bridged between rear ends of the left and right roof side rails, and a rear header The retractor of the seat belt device attached to one side, the roof reinforcement bridged between the left and right ends of the roof panel in front of the rear header, and the retractor attachment formed on the side of the roof reinforcement to which the retractor is attached Part.
According to the above-described configuration, the retractor of the seat belt device includes one side portion of the rear header and a side portion of the roof reinforcement (the side end portion of the roof reinforcement is joined to the roof side rail and has high rigidity). Since it supports in front and back, the support balance of this retractor can be improved.
Further, unlike the structure in which the retractor is attached to the roof side rail far from the retractor, the retractor is attached to the side portion of the roof reinforcement near the retractor, so that the support rigidity of the retractor can be improved.

  In short, it is possible to improve both the support balance of the retractor and the support rigidity.

In one embodiment of the present invention, there is provided a front-rear width enlarged portion in which the front-rear width of the retractor mounting portion is formed larger than the front-rear width of the center of the roof reinforcement.
According to the said structure, the rigidity improvement of a retractor attachment part can be aimed at, suppressing the weight increase of a roof reinforcement. Incidentally, if the entire roof reinforcement is formed wide, the weight increases, but the front-rear width of the retractor mounting portion is formed large, so that the weight increase can be suppressed.

In one embodiment of the present invention, there is provided a vertical width expanding portion in which the vertical width of the retractor mounting portion is formed larger than the vertical width of the center of the roof reinforcement.
According to the said structure, the rigidity of a retractor attachment part can be aimed at, ensuring the ceiling height of the center part of a roof, ie, vehicle interior space.

In one embodiment of the present invention, a corner gusset bridged between the roof reinforcement near the retractor mounting portion and the roof side rail is provided.
According to the above configuration, the rigidity of the retractor mounting portion can be improved while the torsional rigidity of the vehicle body is improved with the above-described corner gusset.

In one embodiment of the present invention, a retractor extending portion that is extended from a mounting portion of the retractor to the side portion of the roof reinforcement and attached to the roof side rail is provided.
According to the above configuration, since the extension portion is connected between the roof reinforcement side portion (retractor mounting portion) and the roof side rail, the rigidity of the retractor mounting portion can be improved without increasing the number of parts. You can plan.

  According to the present invention, in a structure in which the retractor of the seat belt device is attached to one side portion of the rear header bridged between the rear ends of the left and right roof side rails, the roof rain bridged between both ends of the roof panel in front of the rear header. Since the reinforcement is provided and the retractor of the seat belt device is attached to the roof reinforcement side, the retractor is supported by the front and back of the rear header one side and the roof reinforcement side to improve the support balance of the retractor Unlike the roof side rail far from the retractor, the retractor is attached to the side of the roof reinforcement near the retractor, so that the support rigidity of the retractor can be improved.

  For the purpose of improving both the support balance of the retractor of the seat belt device and the support rigidity, the roof panel, the left and right roof side rails forming the upper side of the vehicle body, and the rear of the left and right roof side rails A rear header bridged between the ends, a seat belt retractor attached to one side of the rear header, a roof reinforcement bridged between the left and right ends of the roof panel in front of the rear header, and the roof reinforcement side And a retractor mounting portion to which the retractor is mounted.

An embodiment of the present invention will be described in detail with reference to the drawings.
The drawing shows the mounting structure of a seat belt device for automobiles. First, the overall configuration of the vehicle body will be described with reference to FIG. FIG. 1 is a perspective view showing a state in which the roof side is looked up from the inside of the vehicle interior. The vehicle includes a rear door opening 1, a quarter window opening 2, and a back door opening 3.

The above-described rear door opening 1 includes left and right roof side rails 4 (only the left side is shown) as vehicle body rigid members forming the upper side of the vehicle body, a center pillar 5 having a closed cross-sectional structure extending in the vertical direction, The vehicle is surrounded by a side sill 6 having a closed cross-sectional structure extending in the front-rear direction of the vehicle and a quarter pillar 7 having a closed cross-sectional structure extending in the vertical direction at the lower part of the vehicle body.
Further, the above-described quarter window opening 2 is surrounded by the rear portion of the roof side rail 4, the above-described quarter pillar 7, and the upper portion of the rear end pillar 8.

  Further, the above-described back door opening 3 is formed by a rear header 10 disposed at a lower portion of the roof panel 9 and bridged between the rear ends of the left and right roof side rails 4, 4 in the vehicle width direction, and a rear end pillar 8. It is surrounded. The above-described elements 4, 5, 6, 7, and 8 are vehicle body rigid members.

  Here, a reinforcement 11 is provided so as to straddle the rear passenger compartment side of the roof side rail 4 and the passenger compartment side of the rear end pillar 8, and the rear header 10, the roof side rail 4, and the rear end are provided. A rear corner gusset 12 is provided to reinforce the three corners of the pillar 8.

  On the other hand, a roof reinforcement 13 having a wide structure that extends in the vehicle width direction and is bridged between the left and right roof side rails 4 and 4 is provided corresponding to the portion where the center pillar 5 is disposed. The ment 13 is disposed below the roof panel 9.

  A total of three roof reinforcements 14, 15, 16 are provided between the roof reinforcement 13 and the rear header 10 described above at a predetermined interval in the front-rear direction.

  Each of these roof reinforcements 14, 15, 16 is disposed at the lower part of the roof panel 9, and extends between the left and right roof side rails 4, 4 in the vehicle width direction and is bridged. Each of the roof reinforcements 13 to 16 described above is for ensuring the rigidity of the roof panel 9.

  By the way, between the rear corner gusset 12 that covers the left side as one side part of the rear header 10 described above, specifically, the passenger compartment side of the rear header 10 and the roof reinforcement 16 in front of the rear header gusset 12, A retractor 18 is attached.

  The seat belt device 17 restrains the passenger in the rear central seat in a three-point manner, and includes a seat belt 20 having a tongue 19 at the tip and a retractor bracket 21 (hereinafter simply referred to as a bracket).

In FIG. 1, 22 is a wheel house inner, and 23 is a wheel house outer.
2 is a view showing the roof side looking up from the inside of the vehicle interior (that is, a bottom view), FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2 (corresponding to a front view), and FIG. FIG. 3 is a cross-sectional view taken along line -B, and as shown in FIG. 3, the roof side rail 4 includes a roof side rail outer 4A (an upper portion of the cab side outer) and a roof side rail inner 4B. 4A and 4B are provided with a closed cross section 24 that joins and fixes the respective joint flange portions 4a, 4b, 4c, and 4d and extends in the vehicle front-rear direction.

  Further, as shown in FIGS. 3 and 4, the above-described rear header 10 has a closed section 25 (FIG. 4) extending in the vehicle width direction by fixing the rear header upper 10U and the rear header lower 10L at their joint flange portions. See).

  As shown in FIG. 3, the joint flange 10a at the left end of the rear header lower 10L is formed by joining a joint flange 9a that is integrally lowered from the left side of the roof panel 9 and a joint flange 4a of the roof side rail outer 4A. They are connected by means such as welding.

  On the other hand, as shown in FIG. 2, the rear corner gusset 12 has a recess 12a corresponding to a portion where the rear end attachment portion 21a of the bracket 21 of the retractor 18 is attached to the rear header 10. At the position of the recess 12a, as shown in FIGS. 3 and 4, the rear header lower 10L, the rear corner gusset 12, and the rear end mounting portion 21a of the bracket 21 are fastened using fastening members such as bolts 26 and nuts 27, Fastened together.

  That is, the rear corner gusset 12 is provided with an overlapping portion (see the recess 12a) that overlaps with one side portion of the rear header lower 10L, and the bracket 21 of the retractor 18 is attached to the rear header lower 10L via the rear corner gusset 12. It is a thing.

  FIG. 5 is a perspective view of FIG. 2, and FIG. 6 is a cross-sectional view (corresponding to a front view) of the main part along the line CC in FIG. 2, and the roof reinforcement 16 having a hat-shaped cross section is arranged in the vehicle width direction. The joint flange portion 16a at the left end of the roof panel 9 is connected to the joint flange portion 9a integrally lowered from the left side portion of the roof panel 9 and the joint flange portion 4a of the roof side rail outer 4A. Are connected.

  2, 5, and 6, the roof side rail inner 4 </ b> B has a cutout portion 4 e for enabling three plate members to be punched for the purpose of securing the joint strength of spot welding. Are provided.

  FIG. 7 is an enlarged perspective view showing only the roof reinforcement 16 extracted from the perspective view shown in FIG. 5, and the roof reinforcement 16 includes front and rear upper pieces 16b and 16c as shown in FIG. The roof reinforcement 16 includes a front and rear vertical wall pieces 16d and 16e and a bottom piece 16f, and is formed in a cross-sectional hat shape. A front-rear width enlarged portion 16X formed with a large front-rear width L2 of the attachment portion 16A is provided.

  The roof reinforcement 16 includes a vertical width expanding portion 16Y in which the vertical width W2 of the retractor mounting portion 16A on the side thereof is larger than the vertical width W1 at the center.

  By forming the front-rear width expanding portion 16X and the vertical width expanding portion 16Y corresponding to the retractor mounting portion 16A, the rigidity of the retractor mounting portion 16A is improved and the support rigidity of the retractor 18 is improved. Forming.

  Further, as shown in FIGS. 2, 5, and 6, a corner gusset 28 is provided to be bridged between the roof reinforcement 16 near the retractor mounting portion 16A and the roof side rail inner 4B.

  An upper end portion 28a of the corner gusset 28 is fastened and fixed to a front end mounting portion 21b of the bracket 21 and a roof reinforcement 16 described later, while a lower end portion 28b of the corner gusset 28 is a predetermined portion of the roof side rail inner 4B. The corner gusset 28 is configured to improve the torsional rigidity of the vehicle body and improve the rigidity of the retractor mounting portion 16A.

  As shown in the perspective view of FIG. 8, the above corner gusset 28 is a reinforcing member extending in an inclined manner from the upper end portion 28a to the lower end portion 28b, and a bead 28d is integrally formed on the main body portion 28c. The corner gusset 28 itself is configured to improve the rigidity.

  Instead of the corner gusset 28 shown in FIG. 8, the corner gusset 28 shown in FIG. 9 may be used. In addition to the structure of FIG. 8, the corner gusset 28 shown in FIG. 9 has vertical wall portions 28e, 28e integrally formed on the front and back of the main portion 28c, and joint flange portions 28f, 28f on the vertical wall portions 28e, 28e. Are integrally formed, and a pair of front and rear joining flange portions 28f, 28f are welded and fixed to the roof side rail inner 4B. With this configuration, the strength of the corner gusset 28 itself can be further increased, and the torsional rigidity of the vehicle body can be further improved.

  On the other hand, the bracket 21 of the retractor 18 is integrally formed with the above-described front end mounting portion 21b so as to extend outward from the front portion 21c on the extension line of the rear end mounting portion 21a as shown in FIGS. ing.

  As shown in FIG. 6, the retractor mounting portion 16A (see FIG. 7) on the side of the roof reinforcement 16, the corner gusset 28, and the front end mounting portion 21b of the bracket 21 are connected to a bolt 29, a nut 30, and the like. The fastening member is used to fasten together.

  In the figure, arrow F indicates the front of the vehicle, arrow R indicates the rear of the vehicle, arrow IN indicates the inner side of the vehicle, arrow OUT indicates the outer side of the vehicle, and arrow UP indicates the upper side of the vehicle.

As described above, the mounting structure of the automobile seat belt apparatus shown in FIGS. 1 to 9 includes the roof panel 9, the left and right roof side rails 4 that form the upper side of the vehicle body, the left and right roof side rails 4, 4. 4 between the rear header 10 bridged between the rear ends, the retractor 18 of the seat belt device 17 attached to one side (see the left side) of the rear header 10, and the right and left ends of the roof panel 9 in front of the rear header 10. And a retractor mounting portion 16A (see 17) formed on the side of the roof reinforcement 16 to which the bracket 21 of the retractor 18 is attached (see FIG. 2).
According to this configuration, the retractor 18 of the seat belt device 17 (refer to its bracket 21 in detail) is connected to one side of the rear header 10 and the side of the roof reinforcement 16 (the side end of the roof reinforcement 16 is Since it is supported by the front and rear (refer to the front end mounting portion 21b and the rear end mounting portion 21a) that are joined to the roof side rail 4 and have high rigidity, it is possible to improve the support balance of the retractor 18.
Unlike the structure in which the retractor 18 is attached to the roof side rail 4 far from the retractor 18, the retractor 18 is attached to the side portion of the roof reinforcement 16 close to the retractor 18, so that the support rigidity of the retractor 18 is improved. be able to.
In short, it is possible to improve both the support balance of the retractor 18 and the support rigidity.

The roof reinforcement 16 includes a front-rear width enlarged portion 16X in which the front-rear width L2 of the retractor mounting portion 16A is formed larger than the front-rear width L1 of the center (see FIG. 7).
According to this configuration, it is possible to improve the rigidity of the retractor mounting portion 16 </ b> A while suppressing an increase in the weight of the roof reinforcement 16. For example, if the entire roof reinforcement is formed wide, the weight is increased. However, the entire width of the retractor mounting portion 16A (of the roof reinforcement 16 is not increased) without forming the entire roof reinforcement 16 wide. Since only the front and rear widths of the side portions are formed large, an increase in weight can be suppressed.

Further, the roof reinforcement 16 includes a vertical width expanding portion 16Y in which the vertical width W2 of the retractor mounting portion 16A is formed larger than the vertical width W1 at the center (see FIG. 7).
According to this configuration, it is possible to improve the rigidity of the retractor mounting portion 16A while securing the ceiling height of the center portion of the roof, that is, the vehicle interior space.

In addition, a corner gusset 28 bridged between the roof reinforcement 16 in the vicinity of the retractor mounting portion 16A and the roof side rail 4 is provided (see FIG. 6).
According to this configuration, the rigidity of the retractor mounting portion 16A can be improved while the torsional rigidity of the vehicle body is improved by the corner gusset 28 described above.

  Further, as disclosed in the embodiment, the three corners of the rear header 10, the roof side rail 4, and the rear end pillar 8 are reinforced, and the rear portion of the retractor 18 of the seat belt device 17 (see the rear end mounting portion 21a of the bracket 21). ) And a rear corner gusset 12 having an overlapping portion (refer to the concave portion 12a) with one side portion of the rear header 10 to which the rear header 10 is attached. Since it is possible to fasten and fix to one side and the overlapping portion (see the recess 12a) of the rear corner gusset 12, the support rigidity of the retractor 18 can be further improved.

  FIG. 10 shows another embodiment of the mounting structure for an automobile seat belt device. In the embodiment shown in FIG. 6, the space between the vicinity of the retractor mounting portion 16A of the roof reinforcement 16 and the roof side rail inner 4B. In this embodiment shown in FIG. 10, the corner gusset 28 is attached to the side of the roof reinforcement 16 without using the corner gusset 28 (see the attachment portion 16 </ b> A). ), The extension portion 21d of the bracket 21 of the retractor 18 that extends outward in the vehicle width direction and is attached to the roof side rail inner 4B is integrally formed with the bracket 21.

  The front end mounting portion 21b of the bracket 21 of the retractor 18 is connected to the side of the roof reinforcement 16 by a bolt 29 and a nut 30, and the extension portion 21d of the bracket 21 is a fastening member such as a bolt 31 and a nut 32. Are connected and fixed to the roof side rail inner 4B.

Thus, in the embodiment shown in FIG. 10, the extension portion of the retractor 18 that is extended from the attachment portion of the retractor 18 to the side portion of the roof reinforcement 16 and attached to the roof side rail 4. 21d (specifically, the extending portion 21d of the bracket 21).
According to this configuration, the side portion of the roof reinforcement 16 (attachment portion 16A of the retractor 18) and the roof side rail 4 are connected by the extending portion 21d, so that the retractor 18 is not increased without increasing the number of parts. The rigidity of the mounting portion can be improved.

  In the embodiment shown in FIG. 10 as well, other configurations, operations, and effects are almost the same as those of the previous embodiment shown in FIGS. The detailed description is omitted.

The perspective view which shows the vehicle provided with the attachment structure of the seatbelt apparatus for motor vehicles of this invention in the state which looked up at the roof side from the vehicle interior part Bottom view showing the mounting structure of an automobile seat belt device 2 is a cross-sectional view taken along line AA in FIG. Sectional drawing which follows the BB line of FIG. Perspective view of FIG. Sectional drawing of the principal part in alignment with the CC line of FIG. Perspective view of roof reinforcement Perspective view of corner gusset Perspective view showing another embodiment of corner gusset Front view of main part showing another embodiment of mounting structure of seat belt device for automobile

Explanation of symbols

DESCRIPTION OF SYMBOLS 4 ... Roof side rail 8 ... Rear end pillar 9 ... Roof panel 10 ... Rear header 16 ... Roof reinforcement 16A ... Retractor attachment part 16X ... Front-back width expansion part 16Y ... Vertical width expansion part 17 ... Seat belt device 18 ... Retractor 21d ... Extension Debe 28 ... Corner gusset

Claims (5)

A mounting structure for an automobile seat belt device,
A roof panel,
Left and right roof side rails forming the upper side of the vehicle body;
A rear header bridged between the rear ends of the left and right roof side rails;
A retractor of a seat belt device attached to one side of the rear header;
A roof reinforcement bridged between the left and right ends of the roof panel in front of the rear header;
A structure for mounting an automobile seat belt apparatus, comprising a retractor mounting portion formed on a side portion of a roof reinforcement to which the retractor is mounted. The mounting structure for an automobile seat belt device according to claim 1, further comprising a front-rear width expanding portion in which a front-rear width of the retractor mounting portion is formed larger than a front-rear width of the center of the roof reinforcement. The mounting structure for an automobile seat belt device according to claim 1, further comprising a vertical width expanding portion formed so that a vertical width of the retractor mounting portion is larger than a vertical width of a center of the roof reinforcement. The mounting structure for an automobile seat belt device according to any one of claims 1 to 3, further comprising a corner gusset bridged between a roof reinforcement near the retractor mounting portion and a roof side rail. The automobile seat belt according to any one of claims 1 to 3, further comprising a retractor extending portion that is extended from a mounting portion of the retractor to a side portion of the roof reinforcement and is attached to the roof side rail. Device mounting structure.

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