JP2001138864A - Seat belt device of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mount a seat belt device for a front seat on the front end side of a rear door and secure support strength without adding a reinforcement member in mounting the device in an automobile having an opening part corresponding to a front door and an opening part corresponding to a rear door which form one opening part when both doors are opened. SOLUTION: An upper door lock 3 and a lower door lock 4 are provided on the upper and lower parts of the front end of the rear door 2. A shoulder anchor 34 of the seat belt device for the front seat is fitted to a bracket 5 for fitting an upper door lock for fitting the upper door lock 3 to the rear door 2. A wrap outer anchor 33 and a seat belt retractor 32 are fitted to a bracket 6 for fitting a lower door lock for fitting the lower door lock 4 to the rear door 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat belt device for an automobile, and more particularly to a seat belt device provided for a front seat of an automobile without a center pillar.

[0002]

2. Description of the Related Art Heretofore, there has been known an apparatus in which a seat belt device for a front seat is disposed on a rear door. Such a seat belt device is disclosed in, for example, Japanese Utility Model Laid-Open Publication No.
No. 656 discloses this. The seatbelt device described in the above publication is applied to a center pillarless hardtop vehicle, and a seatbelt retractor is attached to a door hinge attaching rein hose panel (reinforcing member) provided at a front end of a rear door. Things.

[0003]

Incidentally, when a seat belt device for a front seat is set on the rear door, it is necessary to determine the belt mounting position near the front end of the door from the positional relationship of the front seat. However, the mounting structure of the seatbelt device described in the above publication is configured to mount the seatbelt retractor on a door hinge mounting rein hose panel provided to obtain the supporting strength of the door hinge of the rear door. The mounting structure is
It cannot be applied to a rear door that opens and closes with its rear end as a pivot point, and a rear door that opens and closes by sliding in the vehicle front-rear direction.

[0004] The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide an opening corresponding to a front door and an opening corresponding to a rear door. In an automobile that forms one opening when opened, a seat belt device for a front seat can be attached to the front end side of the rear door, and the mounting strength can be secured without adding a reinforcing member at the time of installation. Is to do.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, a seat belt device for an automobile according to the present invention has a configuration as described in each of the claims. In the present invention, the opening corresponding to the door is preferably an opening corresponding to the outer shape of the door. Therefore,
According to the first aspect of the invention, when an external force is input to the belt support member via the seat belt, the external force is efficiently transmitted from the door lock mounting bracket to the body via the door lock and the striker. For this reason, the load on the door panel is reduced, the door is prevented from being deformed or damaged, and the restraint performance of the seat belt is ensured. According to the first aspect of the present invention, the door lock mounting bracket provided at the front end of the rear door is commonly used as the bracket for the belt support member, that is, the door lock mounting bracket and the belt support member mounting bracket are used in common. Are integrated, sufficient supporting strength can be secured without increasing the number of reinforcing members.

Further, when the seat belt retractor and the wrap outer anchor are mounted on the door lock mounting bracket of the lower door lock as in the second aspect of the invention, the number of brackets can be reduced. Even if a somewhat thicker panel is used for the bracket for securing, the weight is substantially reduced, and the number of parts is reduced, so that the number of assembling steps is also reduced.

Further, when the shoulder anchor is mounted on the door lock mounting bracket of the upper door lock as in the invention of the third aspect, the same operation and effect as the invention of the second aspect can be obtained. it can.

According to the fourth aspect of the present invention, a vertically extending reinforcing member is interposed at the front end of the rear door, and a door lock mounting bracket is fixed to the reinforcing member, so that the front end of the rear door is formed. The overall strength can be improved, and thus the support rigidity of the belt support point can be increased.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an automobile without a center pillar. The center pillar-less side door according to the present embodiment is a double door type as shown in FIG. 1, and the front door 1 opens and closes using a front end in the vehicle front-rear direction as a pivot point through a door hinge (not shown),
The rear door 2 opens and closes with a rear end in the vehicle front-rear direction as a pivot point via a door hinge (not shown). Therefore, when both doors 1 and 2 are opened, the opening corresponding to the front door and the opening corresponding to the rear door form one opening.
Although only the right side of the automobile is shown in FIG. 1, the left side is symmetrical and the other doors have the same structure. 2 to 5 and 8 show the structure using the right door, and FIGS. 6 and 7 show the structure using the left door. The mating surface (free end side) of the front door 1 and the rear door 2 is overlapped (see FIG. 3) with the front door 1 side facing outward.
The opening / closing operation of the rear door 2 can be performed only in a state in which is opened.

As shown in FIGS. 6 and 7, the rear door 2 includes a rear door outer panel 21 (hereinafter simply referred to as an outer panel), a rear door inner panel 22 (hereinafter simply referred to as an inner panel), and an interior panel 22 for interior decoration. In addition to the trim (not shown) arranged on the surface side,
At least a reinforcing member 23 is provided to increase the strength of the front ends of the panels 21 and 22. The outer panel 21 and the rear panel 22 are joined to each other at their peripheral edges so as to form a predetermined space 2a (see FIG. 5) between the panels 21 and 22, and are reinforced at the front end side of the door internal space. A member 23 is interposed.

The reinforcing member 23 is formed by bending a vertically long panel having a thickness greater than the thickness of both panels 21 and 22 so as to have a substantially groove-shaped cross section as shown in the figure, with the opening side facing the inner panel 22. The upper and lower panels 21 and 22 are arranged so as to extend up and down, and a flange portion 23a at the periphery of the opening end is joined to the inner panel 22 by welding.
At the upper end of the reinforcing member 23, as shown in FIG. 6, a bolt through hole 23b for attaching a door lock described later is provided. In addition, the outer panel 21 has a side wall 21a.
Has a front wall portion 21b bent from the front end toward the vehicle interior, and a part of the front end surface of the reinforcing member 23 is joined to the front wall portion 21b by welding. As described above, the reinforcing member 23 is interposed at the front end of the rear door 2 in a state of being joined to the outer and inner panels 21 and 22, thereby reinforcing the front end of the door.

Upper and lower door locks 3 and 4 (see FIGS. 3 to 5) are attached to the upper and lower portions of the front end of the rear door 2, respectively. As shown in FIG. 6, in order to mount the upper door lock 3, an upper door lock mounting seat 22c having an appropriate number of bolt holes 22b is formed at the front upper portion of the side wall 22a of the inner panel 22. I have. In order to attach the lower door lock 4, a lower door provided with an appropriate number of bolt through holes 22e is provided on the front side of a bottom wall 22d bent outward from the lower end of the side wall 22a of the inner panel 22. A lock mounting seat 22f is formed.

The upper bracket 5 constituting the reinforcing plate for attaching the upper door lock has a substantially hat-shaped horizontal section as shown in FIG.
Are overlapped on the upper surface of the upper surface facing the outer panel 21 and are joined by welding. The upper bracket 5 includes a plurality of weld nuts 5a for mounting an upper door lock and for mounting a shoulder anchor described later. Then, the upper door lock 3 inserts the main body from the indoor surface side of the inner panel 22 into the U-shaped space of the reinforcing member 23 through the mounting opening 22g provided in the inner panel 22 and inserts the flange into the inner panel 22.
Is fastened to the weld nut 5a by a bolt 15 (see FIG. 5) in a state of contact with the indoor surface side. In FIG. 5, the reinforcing member 23 is omitted for easy understanding in the drawing.

On the other hand, as shown in FIGS. 6 and 7, the lower bracket 6, which constitutes the reinforcing plate for attaching the lower door lock, has a door lock attaching flat surface 6a and an end of the door lock attaching flat surface 6a. It is formed in a substantially L-shape having a belt mounting vertical surface 6b which is bent and extends upward along the side wall portion 22a of the inner panel 22. The lower bracket 6 has a lock mounting flat surface 6a and a terminal bending flange having a bottom wall portion 22b of the inner panel 22 and the reinforcing member 2.
3 is welded to the inner peripheral surface of the lower end. Also, a suitable number of bolt through holes 6 for door lock mounting are provided on the door lock mounting flat surface 6a of the lower bracket 6.
c is provided, and in a state where the lower door lock 4 is disposed inside the door, specifically, in the groove-shaped space of the reinforcing member 23,
The inner panel 22 is fastened by bolts 11 (see FIG. 8) inserted from outside the bottom wall portion 22d through the bolt through holes 22e and 6c.

As described above, the upper door lock 3 and the lower door lock 4 are attached to the upper front end side of the rear door 2, and the upper door lock 3 is attached to the striker 8 attached to the roof side rail 7 when the door is closed. And the lower door lock 4 engages with the striker 10 attached to the rocker panel 9 so that the rear door 2
Is fixed to the body side. The inner panel 22 and the lower bracket 6 are provided with insertion holes 12 and 13 for the striker 10 to enter and engage with the lower door lock 4 when the door is closed. Although not shown, the front door 1 is provided with a door lock substantially at the center in the vertical direction of the rear end face, and the door lock is attached to the front wall 21b of the rear door 2 near the vertical center. And is fixed to the rear door 2.

As shown in FIG. 2, a three-point seat belt device 30 for a front seat is attached to the front end of the rear door 2 configured as described above. As shown in FIGS. 2 to 5, the seat belt device 30 includes a webbing 31, a seat belt retractor (hereinafter, simply referred to as a retractor) 32 for winding the webbing 31, a wrap outer anchor 33 that supports one end of the webbing 31, and a retractor. There is provided a shoulder anchor 34 for supporting the webbing 31 pulled out from the middle 32 and a wrap inner anchor 35 for supporting the connection end of the webbing 31 drawn. In FIG. 2, a trim disposed on the indoor side surface of the inner panel 22 is shown as being shown. However, in the drawings related to the rear door after FIG. 3, the trim is omitted. .

The retractor 32, the wrap outer anchor 33, the shoulder anchor 34, and the wrap inner anchor 35 of the above-described seat belt component constitute a belt support member, and the wrap inner anchor 35 It is fixed to the seat cushion or floor panel 42, but all other parts are attached to the rear door 2. Hereinafter, a mounting structure of the seat belt device 30 to the rear door 2 will be described with reference to FIGS.

Retractor 32 and wrap outer anchor 3
3 is attached to the lower bracket 6 for attaching the lower door lock described above. For this purpose, a weld nut 6d for mounting the seat belt retractor 32 is provided at a substantially central portion of the upper end of the belt mounting vertical surface 6b of the lower bracket 6, and a weld nut 6e for mounting the wrap outer anchor 33 is provided at the front end. ing. As shown in FIGS. 5 and 7, the retractor 32 is configured such that the case body has the inner panel 2.
2 is inserted into the door through a retractor mounting opening 22 h (see FIG. 6) provided in the door 2, specifically, into the grooved space of the reinforcing member 23, and the upper and lower flanges of the case body are connected to the inner surface of the inner panel 22 Struck to the side.
In this state, the lower flange is the weld nut 6d on the center side.
The upper flange is fastened by a bolt 37 to a weld nut 22i fixed to the inner space side of the inner panel 22, as shown in FIG. The wrap outer anchor 33 is disposed on the inner side of the inner panel 22 in the indoor state.
2, and is fastened to the weld nut 6e on the front end side by the bolt 38 through the mounting hole 22j formed in the second.

On the other hand, the shoulder anchor 34 is attached from the inner surface side of the inner panel 22 via the slip joint 25. That is, the slip joint 25 is connected to the bolt through holes 22 b of the inner panel 22 and the reinforcing member 23,
A bolt (not shown) inserted through 3b is fastened to the weld nut 5a of the upper bracket 5, and a shoulder anchor 34 is attached to the slip joint 25 by a bolt 39 (see FIG. 5). The shoulder anchor 34 is disposed at least above a belt line (line passing below the glass window).

The seat belt device 30 is attached to the rear door 2 as described above. Then, the webbing 31 pulled out from the retractor 32 is connected to a pullout hole 14 formed in a trim disposed on the indoor surface side of the inner panel 22.
(See FIG. 2), it is guided upward and folded back through the guide hole 34a of the shoulder anchor 34, and its end is wrapped in the wrap outer anchor 33.
It is connected to the. Further, between the wrap outer anchor 33 and the shoulder anchor 34 in the webbing 21,
A tongue plate 36 for attaching / detaching a belt which can be connected to the buckle on the side of the wrap inner anchor 35 is attached.

In the present embodiment, as described above,
In an automobile having a double door type side door without a center pillar, a seat belt device 30 for a front seat is attached to a front end of a rear door 2. As described above, the rear door 2 can be opened and closed only when the front door 1 is open. Therefore, when the rear door 2 is opened and closed, the seat belt device 30 is disconnected from the wrap inner anchor 35 and is stored vertically along the inner panel 22 of the rear door 2. For this reason, when the rear door 2 is opened, the seat belt device 30 moves from the door opening together with the rear door 2, so that the occupant can get on and off with respect to the rear seat and when the luggage enters and leaves when the rear seat is used as a loading space. Does not hinder usability. Therefore, a wide opening space, which is one of the advantages of an automobile without a center pillar, can be effectively utilized.

By the way, when the vehicle is suddenly braked, the tension acting on the seat belt is controlled by the retractor 3 as a belt supporting member.
2. Input to the rear door 2 from the wrap outer anchor 33 and the shoulder anchor 34. In the present embodiment,
Since the upper and lower portions of the front end side of the rear door 2 are fixed to the body side through the upper and lower door locks 3, 4 and the strikers 8, 10, the input from the retractor 32, the wrap outer anchor 33, and the shoulder anchor 34 , Can be efficiently dispersed and transmitted from the upper door lock 3 and the lower door lock 4 to the body side via the strikers 8 and 10. For this reason, the load on the door panel is reduced, the door is prevented from being deformed or damaged, and the restraint performance of the seat belt can be ensured.

In this case, in the present embodiment, the rear door 2
The upper bracket 5 for the upper door lock 3 provided at the front end of the lower door lock 4 is commonly used as a mounting bracket for the shoulder anchor 34, and the lower bracket 6 for the lower door lock 4 is also used.
Is commonly used as a mounting bracket for the retractor 32 and the wrap outer anchor 33, so that the number of brackets can be reduced as compared with a case where brackets are individually set.
In other words, the bracket for attaching the door lock and the bracket for attaching the belt support member are integrated, so that sufficient supporting strength against the input can be obtained using a small number of reinforcing plates. . Also, with the reduction in the number of brackets, even if somewhat thicker panels are used as the brackets 5 and 6 to increase the support rigidity, the weight is substantially reduced, and the parts are reduced. The number of assembling steps can be reduced in connection with the reduction in the number of points.

In addition, at the front end of the rear door 2, between the outer panel 21 and the inner panel 22, a reinforcing member 23 having a substantially groove-shaped cross-section is disposed so as to extend up and down. Therefore, the strength and rigidity of the front end of the rear door 2 can be increased. Further, since the upper and lower brackets 5 and 6 for attaching the door lock are joined to the reinforcing member 23, it is possible to further increase the support strength against the input from the seat belt. In this embodiment, the upper and lower brackets 5 and 6 are provided with the weld nuts 5a, 6d and 6e.
4. The retractor 32 and the wrap outer anchor 33 can be assembled in a retrofit form from outside the door.

It should be noted that the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist of the present invention. For example, in the above-described embodiment, the two belt support members of the retractor 32 and the wrap outer anchor 33 are attached to the lower bracket 6 for attaching the lower door lock, but the lower bracket 6 is attached to the wrap outer anchor. 33 may be attached. In this case, the retractor 32 is disposed near the center of the front end or at the top of the front end so that the reinforcing member 23
It is possible to change to a configuration to be attached to the. Also,
The retractor 32 is also provided with the rear door 2 in the vehicle width direction.
The inner space 2a is not particularly limited, and may be arranged between the inner panel 22 and a trim (not shown) for interior decoration, or may be arranged so as to be exposed to the indoor side. It is also possible.

Also, a door lock mounting bracket 5,
The configuration in which the belt support member is provided for the upper and lower brackets 6 does not necessarily need to be implemented for the upper and lower brackets 5 and 6.
The embodiment may be changed to one of upper and lower brackets. In addition, the present invention does not prevent implementation in a form in which the reinforcing member 23 is omitted. Further, the opening and closing type of the side door has been described as a double door opening type using a door hinge, but it can be applied to a front door hinge type and a rear door sliding type in which the front door is pivotable and the rear door is slidable in the vehicle front-rear direction. It is. The type of opening and closing of the door is not limited to the above two types, and the front door and the rear door only need to be able to form one opening when both doors are opened. For example, a gull wing type door It can also be applied to doors that open and close using parallel links.

[0027]

As described in detail above, according to the present invention,
In an automobile in which an opening corresponding to a front door and an opening corresponding to a rear door form one opening when the doors are opened, a seat belt device for a front seat can be attached to a front end side of the rear door. In addition, at the time of attachment, the belt supporting strength can be ensured without adding a reinforcing member. Therefore, the weight of the rear door can be reduced, and the restraining performance of the seat belt can be ensured.

[Brief description of the drawings]

FIG. 1 is a perspective view of an automobile provided with a double door type side door without a center pillar.

FIG. 2 is a perspective view showing a rear door and a seat belt device.

FIG. 3 is a side view of the front and rear doors and the seat belt device as viewed from the room.

FIG. 4 is a side view of the reinforcing member set mainly at the front end of the rear door as viewed from the room.

FIG. 5 is a sectional view of FIG. 4;

FIG. 6 is a perspective view showing an exploded structure of the rear door.

FIG. 7 is a perspective view showing a structure of a lower portion of a front end of a rear door and a mounting structure of a retractor and a rack outer anchor.

FIG. 8 is a perspective view schematically showing a mounting structure of a lower door lock, a retractor, and a rack outer anchor to a bracket.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Front door 2 ... Rear door 3, 4 ... Door lock 5, 6 ... Bracket 8, 10 ... Striker 23 ... Reinforcement member 30 ... Seat belt device 31 ... Webbing 32 ... Seat belt retractor 33 ... Wrap outer anchor 34 ... Shoulder anchor 35 … Wrap-in na anchor

Claims (4)

[Claims] 1. A seat belt device applied to a front seat of an automobile, wherein an opening corresponding to a front door and an opening corresponding to a rear door form one opening when both doors are opened, A seat belt device for an automobile, wherein a belt supporting member is connected to a door lock mounting bracket of a door lock provided on a front end side of the rear door for fixing the rear door to the body. 2. The vehicle seat belt device according to claim 1, wherein said belt support member is a wrap outer anchor and a seat belt retractor mounted on a door lock mounting bracket of a lower door lock. Seat belt device. 3. The vehicle seat belt device according to claim 1, wherein said belt support member is a shoulder anchor attached to a door lock mounting bracket of an upper door lock. 4. The vehicle seat belt device according to claim 1, wherein a reinforcing member extending vertically is disposed at a front end of the rear door, and the door lock mounting bracket is provided on the reinforcing member. The seat belt device of the car which fixed the