JPH08192721A - Attaching structure of retractor for shoulder belt - Google Patents

Abstract

PURPOSE: To control structural deformation by efficiently scattering input load on a car body in the case where the forward input load acts on a retractor. CONSTITUTION: A notch 14c opening fronting on a rear deck cross member 11 is provided in the rear shelf panel 14 of a section where a retractor 16 is attached, and the notch is joined to the lower face of the rear deck cross member at its one end. A stair-shaped stepped part 15a is provided in a part toward a rear side for providing a bracket 15 whose upper end 15b is joined to the rear shelf panel. The retractor 16 is accommodated in the above bracket, and an attaching part 18 provided at an about central position on the vertical face of a rear part is attached to the stepped part.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A seat belt needs to be attached to a vehicle body with sufficient strength against a front input load. Generally, a central three-point belt retractor for a front seat is housed and fixed in a center pillar, and a central three-point belt retractor for a rear seat is attached to 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 continuously provided to the upper wall 1a of the rear shelf panel 1 to close the cross section. There is proposed a structure in which the shoulder belt 4 is extended from the belt insertion hole 1c formed in the front wall 1b of the rear shelf panel 1 by forming a part, storing the retractor 3 therein, and fixing it to the bracket 2. It is (actual Kaihei 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 likely to be deformed when an input load is applied to the retractor 3 in the forward direction. . 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 an increase in cost. In addition, workability when attaching the retractor 3 to the rear shelf panel 1 is poor.

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 to efficiently disperse an input load to the vehicle body side to suppress structural deformation. With the goal.

[0005]

In order to achieve the above object, according to the present invention, there is provided a rear deck cross member having a closed sectional structure provided at the rear of the rear seat back, and the rear deck cross member is located rearward of the rear deck cross member. In a shoulder belt retractor mounting structure 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-section structure and the rear deck cross member. A notch that opens toward the rear deck cross member is provided on the rear shelf panel of the portion to be attached, and one end is coupled to the lower surface of the rear deck cross member in the notch, and a step-like step is formed at the rearward portion. A bracket that is provided and whose upper end is connected to the rear shelf panel Provided, in which a structure for attaching the attachment portion provided on the upper and lower surfaces substantially center position of the rear housing the retractor to the bracket with the step portion of the stepped.

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. According to a third aspect of the present invention, the retractor has a structure in which a belt feeding port is provided at a rear position of an upper surface, and a front lower end abuts against the bracket due to a front input load applied to the belt to prevent rotation. Is.

[0007]

[Operation] When a forward input load is applied to the shoulder belt, a forward rotation moment acts on the retractor,
The retractor rotates. The retractor is prevented from rotating by the bracket, and when a further load is applied, the retractor is transmitted as a shear load to the rear shelf panel via the mounting portion. The load transmitted to the rear shelf panel is efficiently dispersed and transmitted to the rear deck cross member and the rear shelf cross member having a high-strength closed cross-section structure, and structural deformation of the rear shelf panel and the like is prevented.

According to the second aspect of the present 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. In the third aspect of the present invention, the retractor has the outlet of the shoulder belt provided at the rear position of the upper surface, so that the front lower end abuts against the bracket due to the front input load applied to the belt, and the retractor is prevented from rotating.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. As shown in FIGS. 1 to 3, a rear deck cross member 11 having a closed cross section structure is provided behind a rear seat back 10 of the vehicle, and a rear cross section structure rear is provided behind the rear deck cross member 11. 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 them, and connecting flange portions provided at both front and rear edges are connected to these rear deck cross members 11. Each of the rear shelf cross members 12 is welded and fixed by spot welding.

By the way, on the rear shelf panel 14,
As shown in FIG. 1, a hole for mounting a speaker, or holes 14a to 14 for a vent hole (air purifier) of an air conditioner, etc.
A large number of c are drilled, and appropriate holes are used according to the specifications. Therefore, there are some unused holes. Therefore, an appropriate hole among the unused holes is used as a mounting hole for the 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 (hereinafter referred to as a “notch 14c”) that opens toward the rear deck cross member 11 is formed, and a bracket 15 is attached to the notch 14c.

The bracket 15 has a shape in which a front surface of a box body fitted in the notch 14c is opened, and a step portion 15a having a stepwise shape toward the rear is formed at a substantially central position of the rear surface.
Joint flange portions 15b and 15c are continuously formed at the upper edges of both side surfaces and the rear surface and the front edge portions of both side surfaces.
The front end 15e of 5d is extended forward. The bracket 15 is integrally formed by press working.

The bracket 15 is a rear shelf panel 1
4 is arranged on the back side of the notch 14c with its front opening facing the rear deck cross member 11, and the joining flange portion 15b at the upper edge is on the back side of the peripheral edge portion of the notch 14c and at the joining flange portion 15c at the front edge. Is welded and fixed to the rear surface of the rear deck cross member 11, and the front edge 15e of the lower surface 15d is welded and fixed to the lower surface of the rear deck cross member 11 by spot welding.

Although an unused hole is used as the mounting portion of the bracket 15 to the rear shelf panel 14, the present invention is not limited to this, and a notch for mounting may be newly provided depending on the case. However, the rear shelf panel 1
It is preferable to use the unused holes formed in 4 as much as possible because the cost and the number of processing can be reduced.

The upper edge of the bracket 18 is welded to the rear end of the upper surface of the retractor 16.
Extends downward along the rear surface of the retractor 16 to a substantially central position and is bent rearward at the central position at a substantially right angle to form a joint flange portion 18a. The retractor 16 is provided with an outlet 16a for the shoulder belt 17 at a rear position on the upper surface thereof.
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 housed in the bracket 15, and the joint flange portion 18a of the bracket 18 is fixed to the step portion 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 mounted on the bracket 15.
6b is opposed to the lower surface 15d of the bracket 15 with a slight distance. 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, they are located at a slightly higher position, and the difference h between them is small (FIG. 3).

The retractor 16 has a bracket 18 so that the upper and lower substantially central positions of the rear surface of the retractor 16 are stepped portions 15a of the bracket 15.
And the center of rotation of the shoulder belt 17 is located substantially in the center of the retractor 16. Therefore, the center of rotation of the shoulder belt 17 is located at substantially the same height as the step portion 15a. As a result, the retractor 16 is arranged so that the extending direction of the shoulder belt 17 is substantially parallel to the surface of the rear shelf panel 14. The bracket 18
The attachment to the bracket 15 may be fixed by spot welding.

The operation will be described below. Retractor 16
When the shoulder belt 17 is attached to the occupant seated on the rear seat and is in a normal state, that is, when the forward input load is not applied to the shoulder belt 17, as shown by the solid lines in FIGS. 2 and 3. It is held in a substantially horizontal state by the bracket 18. And shoulder belt 17
Are installed with almost no restraint on the occupants.

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 in the counterclockwise direction (forward direction) as shown by the arrow in FIG. A rotation moment acts to rotate the bracket 18 in a counterclockwise direction while deforming the bracket 18 as shown by a dotted line, and when the front end 16c of the lower surface 16b contacts the lower surface 15d of the bracket 15, the rotation is blocked. The lower surface 16b of the retractor 16 is attached to the bracket 1
5 facing the lower surface 15d facing each other 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 is attached to the bracket 15, that is, the step portion 15a is deformed via the bolt 19 as shown by the dotted line in FIG. The input load is transmitted as a shear load as indicated by an arrow. At this time, the retractor 16 is prevented from rotating by the bracket 15, and an upward load is applied to the retractor 16, so that the deformation direction of the bracket 15 is also upward, and a decrease in the effective point is suppressed. As a result, the input load direction of the shoulder belt 17 is the same as the rear shelf panel 1
4 is substantially parallel to the rear shelf panel 14 and deformation of the rear shelf panel 14 is prevented. Therefore, it is not necessary to increase the thickness of the rear shelf panel, and the 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 cross-section structure.
2 can be efficiently dispersed. This prevents structural deformation of the vehicle body.

[0020]

As described above, according to the present invention, the forward input load acting on the shoulder belt is transmitted to the rear shelf panel as a shearing load, and the rear deck cross member and rear having a high-strength closed cross-section structure are further provided. It is possible to prevent the rear shelf panel from being deformed by transmitting and distributing the same to the shelf cross members, and to efficiently transmit the input load to the vehicle body to prevent structural deformation of 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, and the increase in weight and cost can be suppressed. Moreover, the structure is simple, and the additional parts can be easily formed in accordance with the structure of the rear shelf panel, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of essential parts 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 the behavior of the retractor when a forward input load is applied to the shoulder belt of FIG.

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

[Explanation 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

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hideki Honjo 4-21-1, Shimomaruko, Ota-ku, Tokyo Mitsubishi Motors Engineering Co., Ltd.

Claims (3)

[Claims] 1. A rear shelf cross member having a closed cross-section and a rear cross-member having a closed cross-section provided behind the rear seat back, the rear shelf cross-member having a closed cross-section provided rearward of the rear deck cross member. In a shoulder belt retractor mounting structure in which a seat belt retractor for seating a rear seat is mounted on a rear shelf panel that is installed so as to straddle the rear deck panel, the rear deck cross member faces the rear shelf panel at the portion where the retractor is mounted. A notch that opens is provided, and one end is coupled to the lower surface of the rear deck cross member in the notch, and a stepwise step portion is provided at a rearward portion, and a bracket whose upper end is coupled to the rear shelf panel is provided, The retractor is stored in the bracket and the upper and lower surfaces of the rear part A shoulder belt retractor mounting structure, wherein a mounting portion provided at a substantially central position is mounted on the stepped step portion. 2. The retractor mounting structure for a shoulder belt according to claim 1, wherein the mounting portion of the retractor is fixed to the step portion of the bracket by one-point tightening. 3. The retractor is provided with a belt feeding port at a rear position on an upper surface thereof, and a front lower end abuts against the bracket due to a front input load applied to the belt to prevent rotation. 2. The shoulder belt retractor mounting structure according to 2.