JPS63222957A - Seat belt device of automobile - Google Patents

Abstract

PURPOSE:To reduce pressing force of a seat belt to a person sitting on the front seat, in a seat belt device to which a retractor is installed in a rear door, by moving a belt guide toward the front end part of the rear door according to the opening of the rear door. CONSTITUTION:When a rear door 4 is fully opened with a hinge 21 as its center, a rod member 14 is projected from a case 13 by L accompanying the opening operation with its tip end 14a touching a center pillar 17 by a coil spring 16a. By this, a belt guide 11 supported by the rod member 14 is moved forward along a drawing out port 7 of a door trim 6 and moved toward the front end part of the rear door 4 according to the opening degree. Accordingly, the amount of pulling out outside of car and its tension of the seat belt 5 is reduced as much as possible. In this way, the pressing force of the seat belt to the person sitting on the front seat at the opening of the rear door can be reduced as much as possible, specially, it becomes possible that the pressing force in case where the retractor 3 becomes the locked state by the rapid opening is largely reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a seat belt device for a vehicle, and more particularly to a seat belt device for a vehicle in which a seat belt retractor for a front seat is installed in a rear door.

(Prior Art) Conventionally, seat belt devices for front seats of automobiles have a structure in which a retractor is housed between the center pillar of the vehicle body and its pillar trim (Utility Model No. 61-7).
8064, etc.), but in recent years, a structure in which the retractor is attached to the inside of the rear door has been considered. In this structure, the seatbelt retractor is attached to the lower part of the inner panel of the rear door, and the seatbelt, which is wound around the retractor with a certain tension, is guided into the passenger compartment through a drawer opening in the door trim, and is attached to the seat of the vehicle. A tank fixedly provided in the middle of the belt is fitted and fixed to a locking device disposed on the center side of the vehicle body on the side of the front seat to protect the occupants in the front seat.

(Problem to be Solved by the Invention) By the way, in a vehicle in which a seatbelt retractor is installed in the rear door as described above, when the rear door is rotated toward the outside of the vehicle and opened, As the rear door opens, the seat belt is also pulled outward.

For this reason, if a front seat occupant opens the rear door while wearing a seat belt, the front seat occupant's body will be compressed by the seat belt with a force greater than the winding tension. If the front seat is opened suddenly, there is a risk that the front seat passenger may become locked and press the passenger's shoulders and chest with strong force, causing discomfort to the passenger in the front seat. There was a problem with this.

The present invention has been made in view of the above circumstances, and its purpose is to reduce as much as possible the compressive force from the seatbelt that is transmitted to the front seat occupant who has fastened the seatbelt when the rear door is opened. To provide a seat belt device for an automobile in which a retractor is installed in a rear door, which can reduce the weight of the seat belt.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a retractor for a front seat seat belt that is installed inside the rear door, and a seat belt that is wound around the retractor that is pulled up by an opening in the door trim. In an automobile seat belt device that is led into a vehicle interior from an exit, the outlet is formed in the shape of a long hole along the longitudinal direction of the vehicle, and a seat belt is formed in the inner surface of the door trim in the front along the outlet. A movable seat belt guide is disposed in the rear door, and the seat belt guide is positioned and supported behind the drawer opening when the rear door is closed, and is linked to the opening operation when the rear door is opened. A seat belt device for an automobile is constructed by providing an operating means for supporting the seat belt guide while moving it forward of the outlet.

(Function) In the present invention configured as described above, when the rear door is closed, the seat belt guide is positioned at the end of the elongated seat belt outlet formed in the door trim and is operated by the operating means. Supported. When the rear door is opened from this state, the operating means is operated in conjunction with the opening operation, and the seat belt guide supported by the operating means is moved forward along the outlet. Therefore, when the rear door is opened, the seat belt is pulled outward in the vehicle width direction of the vehicle body, and the tension generated in the seat belt at that time is reduced as much as possible. The force exerted by the seat belt on the occupant in the front seat who is wearing the belt is reduced as much as possible.

(Embodiment) A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 shows the main parts of the automobile seat belt device according to the present invention, and is a plan sectional view of the rear door (an enlarged sectional view of section A in Fig. 3), and Fig. 2 shows the line ■-■ in Fig. 1. Arrow sectional view, 3rd
The figure is a schematic perspective view of the interior of a vehicle equipped with the seat belt device of the present invention.

As shown in FIG. 3, the seatbelt device 2 of the front seat 1 of the vehicle has a general ELR type three-point support structure, and the seatbelt retractor 3 of this seatbelt device 2 is shown in the illustration. It is housed inside the rear door 4 so that it looks like this. The seat belt 5 wound around the retractor 3 is pulled out into the vehicle interior from a drawer lower formed on the door trim 6 of the rear door 4, and is inserted into the belt guide 1a provided on the shoulder of the front seat 1, and the tip thereof A tongue 9 provided at the front seat 1 is removably fitted into a latch 10 provided on the side of the center side of the vehicle body, and the lap seat belt is branched from the middle of the seat belt 5. The tip end 5b of the front seat 1 is fixed to a floor 8 or the like on the outside of the vehicle body on the side of the front seat 1, so that the occupant seated in the front seat 1 is supported and protected at three points. .

By the way, as shown in FIGS. 1 to 3, the retractor 3 for the belt 5 to the seat 1 is located slightly behind the center of the rear door 4 and is attached below the inner panel 4a of the rear door 4. Further, the lower drawer for pulling out the seat belt 5, which is always wound around the retractor 3 with a constant tension, into the vehicle interior is formed in the shape of a long hole along the front-rear direction of the vehicle. Below this drawer lower, a belt guide 11 is disposed on the inner side of the door trim 6 and is movable in the front and back direction along the drawer lower. It is supported so as to be movable back and forth along the drawer lower according to the drawer.

The operating means 12 is disposed between the inner panel 4a and the outer panel 4b of the rear door 4, and includes a bottomed cylindrical case 13 and a rod member that is slidably movable within the case 13. 14, a support member 15 that is provided to protrude from the rod member 14 toward the inside of the vehicle interior in the radial direction and supports the belt guide 11, and a support member 15 that urges the rod member 14 toward the front side of the vehicle. biasing means 16 to
It is mainly composed of.

The base end 13a of the case 13 on the open end side is welded and fixed to the inside of the front end wall 4C of the inner panel 4a, and the upper and lower parts are connected to the inner panel via a bracket 24 over the entire length. It is welded and fixed to 4a and is provided substantially horizontally.

The other end 13b of the case 13 on the closed side extends further rearward than the rear end 7a of the drawer lower formed in the door trim 6. The front end wall 4C of the inner panel 4a is connected to the rear side surface 17a of the center pillar 17 of the vehicle body.
The distal end 14a of the rod member 14, which is slidably inserted into the case 13, is inserted into the fixed position of the proximal end 13a of the case 13, and is connected to the center pillar 17. An insertion hole 18 is opened for abutment.

The rod member 14 is provided with flange portions 14b and 14G having enlarged diameters at its rear end and approximately at its center. ! I'm starting to move. Further, a coil spring 16 as the biasing means 16 is provided between the flange 14b at the rear end of the rod member 14 and the other end 13b on the closed side of the case 13.
a is inserted, and this coil spring 16a functions as a compression spring to constantly urge the rod member 14 forward.

Further, the support member 15 of the belt guide 11, which is provided so as to protrude from the rod member 14 toward the vehicle interior side, has a long hole formed in the case 13 and the inner panel 4a, respectively, along the moving direction of the rod member 14. The support member 15 is guided between the inner panel 4a and the door trim 6 through 19 and 20, and the support member 15 is bent toward the lower drawer of the door trim 6. The belt guide 11 is welded to the protruding end 15a.

Therefore, in the seat belt device 2 configured in this manner, as shown in FIG. case 13 in contact with
As a result, the coil spring 16a is compressed and accumulates elastic force, and the belt guide 11 faces the elongated drawer lower formed in the door trim 6 and moves toward the front of the vehicle. Located at the rear of the direction.

From this state, when the rear door 4 is rotated outward in the width direction of the vehicle around the door hinge 21 and opened to its fully open position (relative to the center pillar 17 of the vehicle body in the figure)
The side position is moved to show the fully open position of the rear door 4. ), with the opening operation of the rear door 4, the front end wall 4C of the inner panel 4a and the rear side surface 1 of the center pillar 17
7a are moving away from each other. Then, the rod member 14 is urged by the elastic force of the coil spring 16a, and the tip end 1
4a is maintained in contact with the rear side surface 17a of the center pillar 17 and is projected from the case 13, and is moved forward by the maximum length L when viewed from the rear door 4 side.

As a result, the belt guide 11 supported by the rod member 14 is also moved forward from the rear position along the drawer lower formed in the door trim 6 by the maximum length L mentioned above. Therefore, when the rear door 4 is opened, the belt guide 11 is moved toward the outside of the vehicle together with the rear door 4, and at the same time, the belt guide 11 is moved along with the rear door 4 according to the opening angle.
It will be moved towards the front end of. In other words,
The belt guide 11 is moved outward from the vehicle while the radius of its rotation locus is decreasing.

Therefore, the seat belt 5 that is inserted into the belt guide 11 and guided into the vehicle interior is pulled out of the vehicle interior when the rear door 4 is opened, and the force exerted at that time (i.e., , seat belt 5
(tension acting on) is reduced as much as possible.

By the way, in the front seat seat belt device 2 in which the retractor 3 is disposed inside the rear door 4, when the occupant in the front seat 1 opens the rear door 4 while wearing the seat belt 5, the occupant The force caused by the seat belt 5 being pulled outward from the vehicle is added to the winding tension of the retractor 3, which is always acting on the seat belt 5, and the seat belt 5 is strongly compressed.

However, as described above, in the present invention, the force by which the seat belt 5 is pulled out of the vehicle and the force (tension of the seat belt 5) at that time are reduced as much as possible, so that the rear door 4 is Front seat 1 when opened
0 The force pressing on the occupant with the seat belt 5 is reduced as much as possible, especially when the rear door 4 is suddenly opened and the retractor 3 is locked. It has become so.

As shown in FIG. 1, when the rear door 4 is opened widely, the rod member 14 of the operating means 12 is moved at its tip 1.
4a slides on the rear side surface 17a of the center pillar 17 toward the inside of the vehicle interior, and its contact angle θ increases. Therefore, if the opening angle of the rear door 4 exceeds a certain angle, there is a risk that the rod member 14 may obstruct the closing operation when the rear door 4 is opened.

Therefore, in this embodiment, in order to smoothly close the rear door 4, the tip 14a of the rod member 14 contacts the rear side surface 17a of the center pillar 17 when the rear door 4 is opened at a predetermined angle or more. is provided with an abutting member 23 having a curved surface 22 to reduce the abutting angle.

Further, FIG. 4 shows a modified embodiment, and as shown in this figure, the coil spring 16a of the operating means 12 has a flange 14C formed approximately at the center of the rod member 14 and a front end wall of the inner panel 4a. 4C, and its both ends may be locked to the flange 14C and the front end wall 4C side, so that it functions as a tension spring.

(Effects) To summarize, according to the present invention, when the rear door is opened, the belt guide is moved toward the front end of the rear door while reducing the radius of its rotation locus according to the opening angle. Can be done. For this reason, the amount by which the seat belt, which is inserted into the belt guide and guided into the vehicle interior, is pulled out of the vehicle interior when the rear door is opened,
The tension generated in the seatbelt at that time can be reduced as much as possible, and as a result, the force exerted by the seatbelt on the occupant in the front seat when the rear door is opened is reduced as much as possible. This makes it possible to significantly reduce the compressive force, especially when the rear door is suddenly opened and the retractor becomes locked.

[Brief explanation of the drawing]

Fig. 1 shows the main parts of the automobile seat belt device according to the present invention, and is a plan sectional view of the rear door (an enlarged sectional view of section A in Fig. 3), and Fig. 2 shows the line ■-■ in Fig. 1. Arrow sectional view, 3rd
The figure is a perspective view of the interior of a vehicle equipped with the seat belt device of the present invention, and FIG. 4 is a plan cross-sectional view of a main part of a modified embodiment. 1...Front seat 2...Seat belt device 3...Retractor 4...Rear door 5...
・・Seat belt 6・Door trim 7・・・・
Outlet 11...Belt guide 12...
Operation means

Claims (1)

[Claims] In an automobile seat belt device, a retractor for a front seat seat belt is installed inside the rear door, and the seat belt wound around the retractor is guided into the passenger compartment through an outlet opening in the door trim. A seatbelt guide is formed in the shape of a long hole along the direction, and a seatbelt guide is disposed on the inner surface of the outlet, and is movable back and forth along the seatbelt guide. The seatbelt guide is provided with an operating means that is positioned behind and supports the seat belt guide when the rear door is closed, and that moves and supports the seat belt guide forward of the seat belt guide in conjunction with the opening operation when the rear door is opened. Seat belt devices for automobiles.