JP3201203B2 - Retractor mounting structure for shoulder belt - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractor mounting structure for a shoulder belt of a rear seat.

[0002]

2. Description of the Related Art A seat belt needs to be attached to a vehicle body with sufficient strength against a forward input load. Generally, the retractor of the center three-point belt for the front seat is stored and fixed in the center pillar, and the retractor of the center three-point belt for the rear seat is mounted on a rear shelf panel or the like. As a structure for attaching the retractor to the rear shelf panel, for example, as shown in FIG. 4, a bracket 2 having a substantially L-shaped cross section is fixed to the back side of a front wall 1b connected to the upper wall 1a of the rear shelf panel 1, and the closed cross section is used. A structure is proposed in which a retractor 3 is accommodated therein and fixed to the bracket 2 so that the shoulder belt 4 is extended from a belt insertion hole 1c provided in the front wall 1b of the rear shelf panel 1. (4-4)
1473).

[0003]

However, in the structure in which the retractor 3 is attached to the rear shelf panel 1, the bracket 2 and the rear shelf panel 1 are easily deformed when a forward input load is applied to the retractor 3. . Therefore, it is necessary to increase the thickness of the rear shelf panel 1 and the bracket 2 in order to have sufficient strength against an input load, which causes an increase in weight and cost. Further, workability when attaching the retractor 3 to the rear shelf panel 1 is poor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and provides a retractor mounting structure for a shoulder belt which has a simple structure and efficiently disperses an input load to a vehicle body side to suppress structural deformation. With the goal.

[0005]

According to the present invention, there is provided a rear deck cross member having a closed cross-sectional structure provided at the rear of a rear seat back, the rear deck cross member being located rearward of the rear deck cross member. A retractor mounting structure for a seat belt, in which a seat belt retractor for seating a rear seat is mounted on a rear shelf panel provided so as to straddle a rear-shelf cross member having a closed cross-sectional structure and the rear deck cross member provided by the retractor. Belt pay-out is top rearward
Provided location, before the cut Ya shelf panel provided with a notch which opens to face the rear deck cross member, the cut end is coupled to the lower surface of the rear deck cross member, the deformation and the input load is applied Possible steps
A first bracket upper end provided in a portion toward the rear is coupled to the rear shelf panel provided, said retry
The retractor is housed in the first bracket and the retractor
The mounting portion of the second bracket attached to the
The opposite upper and lower surfaces substantially center position of Kuta rear is obtained by the structure that is attached to the stair-shaped step portion.

According to a second aspect of the present invention, the retractor has a structure in which the mounting portion is fixed to the step portion of the bracket by one-point tightening. In claim 3, the retractor has a lower surface slightly spaced from the lower surface of the first bracket.
And is attached to the step so as to oppose each other. In claim 4, the retractor has a top surface
Of the belt is in contact with the rear shelf panel.
At the same height or slightly higher
This is a structure attached to the notch.

[0007]

[Action] When a forward input load is applied to the shoulder belt, a forward rotational moment acts on the retractor,
Step of the first bracket via the mounting part of the second bracket
The input load is transmitted as a shear load to the rear shelf panel while deforming the upward . The load transmitted to the rear shelf panel is efficiently dispersed and transmitted to the high-strength rear deck cross member and the rear shelf cross member having a closed cross-sectional structure, thereby preventing structural deformation of the rear shelf panel and the like.

According to the second aspect of the invention, the retractor can be easily rotated when a forward input load is applied by fixing the mounting portion to the step portion of the bracket by one-point tightening .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the accompanying drawings. As shown in FIGS. 1 to 3, a rear deck cross member 11 having a closed cross-sectional structure is provided behind a rear seat back 10 of the vehicle. A shelf cross member 12 is provided, and a lower end of a rear window glass 13 is fixed to the rear shelf cross member 12. A rear shelf panel 14 is provided between the rear deck cross member 11 and the rear shelf cross member 12 by bridging the rear deck cross member 11 and connecting flange portions provided at both front and rear edges. Each is fixed to the rear shelf cross member 12 by spot welding.

By the way, the rear shelf panel 14 has
As shown in FIG. 1, holes 14a to 14 for a speaker mounting hole or a vent (air purifier) of an air conditioner or the like.
A large number of holes c are provided, and appropriate holes are used according to the specifications. Therefore, there are a number of unused holes. Therefore, an appropriate one of the unused holes is used as a mounting hole for a bracket for mounting the retractor. That is, one hole 14c closest to the rear deck cross member 11 is selected, and the front edge of the hole 14c is cut out.
A notch that opens toward the rear deck cross member 11 (hereinafter referred to as a “notch 14c”) is provided with a first notch .
The bracket 15 as a bracket is attached.

The bracket 15 has a shape in which the front surface of a box fitted into the notch 14c is open, and a step portion 15a is formed substantially in the center of the rear surface in a stepped shape toward the rear.
Joining flange portions 15b and 15c are formed continuously on the upper edge of both side surfaces and the rear surface and the front edge of both side surfaces.
The front end 15e of 5d extends forward. The bracket 15 is formed integrally by press working.

The bracket 15 is used for the rear shelf panel 1.
4 is provided on the back side of the notch 14c with its front opening facing the rear deck cross member 11, and the joining flange 15b at the upper end is located behind the peripheral edge of the notch 14c and the joining flange 15c at the front end. Are fixed to the rear surface of the rear deck cross member 11 by welding and the front edge 15e of the lower surface 15d is fixed to the lower surface of the rear deck cross member 11 by spot welding.

Although an unused hole is used as a mounting portion of the bracket 15 to the rear shelf panel 14, the present invention is not limited to this, and a new mounting notch may be provided in some cases. However, the rear shelf panel 1
It is preferable to use the unused holes drilled in 4 as much as possible, because it is possible to reduce the cost and the number of processes.

A second bracket is provided at the rear end of the upper surface of the retractor 16.
The upper edge of a bracket 18 as a socket is welded, and the bracket 18 extends downward along the rear surface of the retractor 16 to a substantially central position, and is bent rearward at a substantially right angle at the central position to form a rear end. Is the joint flange 18a
It has been. The retractor 16 is provided with a feed-out port 16a for a shoulder belt 17 at a rear position on the upper surface.
The shoulder belt 17 is pulled out in the front direction, that is, in the direction of the rear seat back 10 as shown by an arrow.

The retractor 16 is accommodated in a bracket 15, and a joint flange 18a of the bracket 18 is fixed to the step 15a at one point, for example, by a mounting bolt 19 and a nut 20. And the retractor 16
Is the lower surface 1 when attached to the bracket 15.
6b is opposed to the lower surface 15d of the bracket 15 at a slight interval. Further, the position of the belt feeding port 16a on the upper surface is substantially the same height as the rear shelf panel 14,
Alternatively, it is located at a slightly higher position, and the difference h is small (FIG. 3).

The retractor 16 has a stepped portion 15a of the bracket 15 formed by the bracket 18 so that the upper and lower center positions of the rear surface thereof are substantially at the center.
, And the rotation center of the shoulder belt 17 is located substantially at the center of the retractor 16. Therefore, the rotation center of the shoulder belt 17 is located at substantially the same height as the step 15a. Thereby, the retractor 16 is disposed such that the extension direction of the shoulder belt 17 is substantially parallel to the surface of the rear shelf panel 14. The bracket 18
May be fixed to the bracket 15 by spot welding.

The operation will be described below. Retractor 16
When the shoulder belt 17 is worn by an occupant seated on the rear seat and is in a normal state, that is, when the front input load is not applied to the shoulder belt 17, as shown by solid lines in FIGS. The bracket 18 is held in a substantially horizontal state. And the shoulder belt 17
Is mounted with almost no restraint on the occupant.

In this state, when a forward input load is applied to the shoulder belt 17, the shoulder belt 17 is locked, and accordingly the retractor 16 is moved counterclockwise (forward) in the drawing as shown by an arrow in FIG. When a rotational moment is applied, the bracket 18 rotates counterclockwise while deforming as shown by a dotted line. When the front end 16c of the lower surface 16b contacts the lower surface 15d of the bracket 15, the rotation is prevented. The lower surface 16b of the retractor 16 is attached to the bracket 1
5, facing the lower surface 15d at a slight interval,
Therefore, the amount of rotation of the retractor 16 in the counterclockwise direction is small.

When a further input load is applied, the retractor 16 moves the mounting portion to the bracket 15, that is, the step portion 15 a via the bolt 19 as shown by the dotted line in FIG. The input load is transmitted as a shear load as shown by an arrow in FIG. At this time, the rotation of the retractor 16 is prevented by the bracket 15, and an upward load acts on the retractor 16, whereby the deformation direction of the bracket 15 also becomes upward, and the reduction of the effective point is suppressed. As a result, the input load direction of the shoulder belt 17 is
4, so that the deformation of the rear shelf panel 14 is prevented. Therefore, it is not necessary to particularly increase the thickness of the rear shelf panel, and a conventional thin rear shelf panel can be used. The input load transmitted to the rear shelf panel 14 is applied to the rear deck cross member 11 and the rear shelf cross member 1 having a high-strength closed-section structure.
2 is efficiently dispersed. This prevents structural deformation of the vehicle body.

[0020]

As described above, according to the present invention, a forward input load acting on a shoulder belt is transmitted to a rear shelf panel as a shear load, and a rear deck cross member and a rear deck having a high-strength closed-section structure are further provided. By transmitting and dispersing to the shelf cross member, deformation of the rear shelf panel can be prevented, and structural deformation of the vehicle body can be prevented by efficiently transmitting the input load to the vehicle body. Further, it is not necessary to increase the thickness of the rear shelf panel or the bracket, and the conventional rear shelf panel can be used as it is, thereby suppressing an increase in weight and cost. Moreover, the structure is simple, and additional components can be easily formed in accordance with the structure of the rear shelf panel, so that the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of an essential part showing an embodiment of a shoulder belt retractor mounting structure according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is an explanatory diagram showing a behavior of the retractor when a forward input load is applied to the shoulder belt of FIG. 2;

FIG. 4 is an explanatory view of a conventional mounting structure of a retractor to a rear shelf panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rear seat back 11 Rear deck cross member 12 Rear shelf cross member 14 Rear shelf panel 14a, 14b Hole 14c Notch 15, 18 Bracket 15a Step 16 Retractor 17 Shoulder belt 19 Mounting bolt 20 Nut

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Hideki Honjo 4-2-1-1, Shimomaruko, Ota-ku, Tokyo Mitsubishi Automotive Engineering Co., Ltd. (56) References JP-A-8-142915 (JP, A) JP JP-A-4-169360 (JP, A) JP-A-61-98654 (JP, A) JP-A-4-231235 (JP, A) JP-A-6-144155 (JP, A) (U, U) Shokai 55-136657 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60R 22/12-22/48 B62D 25/08

Claims (4)

(57) [Claims] 1. A rear deck cross member having a closed sectional structure provided behind a rear seat back and having a closed cross sectional structure provided behind the rear deck cross member, and a rear shelf cross member having a closed sectional structure provided behind the rear deck cross member. In a shoulder belt retractor mounting structure in which a seat belt retractor for seating the rear seat is mounted on a rear shelf panel provided so as to straddle the retractor, the retractor of the retractor has a belt payout opening at a rear upper surface position.
Provided, before the cut Ya shelf panel provided with a notch which opens to face the rear deck cross member, wherein the notch is being joined at one end thereof to a lower surface of the rear deck cross member, deformable and is input load applied Stepped steps
A first bracket provided on a portion facing a rear side and having an upper end coupled to the rear shelf panel, wherein the retractor is housed in the first bracket;
The mounting part of the second bracket attached to the retractor
Shoulder belt retractor mounting structure, wherein Rukoto attached to the stair-shaped step portion facing the upper and lower surfaces substantially center position of the retractor rear. 2. The retractor mounting structure for a shoulder belt according to claim 1, wherein the mounting portion of the retractor is fixed to a step portion of the bracket by one-point fastening. 3. The retractor according to claim 1, wherein a lower surface of the retractor is the first brush.
So that it is opposed to the lower surface of the
3. The device according to claim 1 , wherein the device is attached to a step.
3. The retractor mounting structure for a shoulder belt according to 1. 4. The retractor according to claim 1, wherein the retractor is provided on the upper surface of the belt.
The payout opening is approximately the same height as the rear shelf panel, or
Or slightly above the shoulder.
4. The method according to claim 1, wherein
Retractor mounting structure for shoulder belt.