JPH0331619Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a vehicle seat structure that improves the structure of the seat cushion of a seat installed in a vehicle interior.

[Technical background of the invention]

2. Description of the Related Art Generally, a seat having a configuration shown in FIG. 7 is known as a seat installed in a vehicle interior of a vehicle such as an automobile. This FIG. 7 shows a seat arranged at the driver's seat in the vehicle interior, and 1 is the seat body. This seat body 1 is formed by a seat cushion 2 and a seat back 3. In this case, the seat cushion 2 has a seat cushion main body formed by a seat frame and a cushion material installed inside the seat frame, and the entire upper surface of the seat cushion main body is covered with a skin material. It is structured so that

Further, 4 is a seat belt device for fixing an occupant seated on the seat body 1 to the seat body 1. This seat belt device 4 includes a shoulder anchor (upper support part) 5 attached to the upper part of one side (door side) of the seat body 1, for example, the upper part of the center pillar arranged between the front door and the rear door of the vehicle body. A seatbelt retractor (retractor) 6 disposed at the bottom of the center pillar, a seatbelt webbing 7 that is unwound from the seatbelt retractor 6, a removable member 8 attached to the seatbelt webbing 7, and the seat body 1. It is formed by various structural members such as a buckle (lower support part) 9 disposed at the lower side (back bone side of the floor panel). In this case, the seatbelt webbing 7 that is paid out from the seatbelt retractor 6
The distal end of the buckle 9 is attached via a shoulder anchor 5 to a suitable fixing part at the bottom of the seat body 1 on the side opposite to the buckle 9 (on the door side), for example. Then, with the occupant seated on the seat body 1, the seat belt webbing 7, which is paid out from the seat belt retractor 6, is wrapped around the occupant on the seat body 1 via the shoulder anchors 5.
By inserting the engaging claw part of the detachable member 8 into the engagement hole of the buckle 9 to the predetermined engagement position, the detachable member 8 is removed.
The engaging claw portion of the shoulder anchor 5 is detachably engaged with the buckle 9, and in this state, the shoulder anchor 5 is
The seat belt webbing 7 is stretched between the shoulder belt 10 and the detachable member 8 which is secured to the buckle 9, and the upper body of the occupant seated on the seat body 1 is restrained by the shoulder belt 10. Seatbelt webbing 7 is installed between the fixing part on the front end side of seatbelt webbing 7 and detachable member 8 that is locked to buckle 9.
The waist belt 11 restrains the waist of the occupant seated on the seat body 1, and the occupant is fixed in the normal seating position as shown by the solid line in FIG. . In addition, in Figure 7, P
indicates the position of the center of gravity (reference position) of the occupant.

[Problems with background technology]

Seatbelt device 4 for conventional configurations
If the occupant's lower back is not sufficiently restrained by the waist belt 11 while using the seat belt 11, the occupant's lower back may slip on the upper surface of the seat cushion 2 due to inertia, for example, when a moving vehicle causes a collision. , there was a risk of being pushed forward. Therefore, as shown by the imaginary line in FIG. 7, as the occupant's waist moves, the occupant's upper body sinks downwards in the seat body 1, a so-called submarine phenomenon, which causes the shoulder anchors 5 and buckles 9 to become loose. There is a risk that the occupant will be hung by the shoulder belt 10 that is stretched between the detachable member 8 and the detachable member 8 that is stopped, which poses a problem in improving the safety of the occupant.

[Purpose of invention]

This idea suggests that even if the occupant's lumbar region is weakly restrained by the seatbelt device, when a moving vehicle causes a collision, the occupant's lumbar region may slide on the top surface of the seat cushion due to inertia, causing the vehicle to move forward. It is possible to prevent the passenger from being pushed out in the direction of the seat, and it is possible to improve safety by preventing the submarine phenomenon in which the upper body of the occupant sinks below the seat.In addition, it is possible to improve the reliability of operation. The purpose of the present invention is to provide a vehicle seat structure that can be used.

[Summary of the invention] This invention is designed to provide a seat that is suspended between an upper support part disposed at the upper part of one side of a seat installed in a vehicle interior and a lower support part disposed at the lower part of the other side of the seat. In the seat structure of a vehicle equipped with a shoulder belt type seat belt device that restrains the upper body of an occupant seated on the seat, the seat frame is attached to the front end portions of both sides of the seat frame attached to the seat cushion body of the seat. Support brackets are provided on the inner side of the seat frame so as to protrude from each other in a spaced-apart manner, and are arranged toward the vehicle width direction, and both ends of the support brackets are inserted into and supported in insertion holes of the support brackets on both sides of the seat frame. The vehicle is characterized by the provision of an energy-absorbing cross member that prevents the waist position of the occupant seated on the seat from moving forward from the normal seating position.

[Example of idea]

An embodiment of this invention will be described below with reference to FIGS. 1 to 5. Note that FIG. 1 schematically shows the configuration of a driver's seat of a vehicle such as an automobile, and the same parts in FIG. That is, this invention has a shoulder anchor (upper support part) 5 disposed at the upper part of one side of the seat body 1 installed in the vehicle interior, and a buckle (upper support part) 9 disposed at the lower part of the other side of the seat body 1. The seat frame 2 is mounted within the seat cushion body 21 of the seat body 1 in which a seat belt device 4 of 10 types with shoulder belts stretched between the locked detachable member 8 is attached.
Support brackets 23, 23 are provided at the front end portions of both sides of the seat frame 22 and project from the inside of the seat frame 22 in a spaced-apart manner. An energy absorbing cross member 25 is inserted and supported in the insertion holes 24 of the support brackets 23, 23 to prevent the waist position of the occupant seated on the seat body 1 from moving forward from the normal seating position. It is characterized by having the following. In this case, the seat frame 22 of the seat cushion main body 21 is formed by bending a component member having a substantially U-shaped cross-sectional shape into a substantially rectangular frame shape with the opening side facing inward, as shown in FIG. It is something.

Further, the support bracket 23 is a member having a substantially U-shaped cross section as shown in FIG. This support bracket 23 is inserted into the opening surfaces on both sides of the seat frame 22 with its opening surface facing outward (with the opening surface of the support bracket 23 facing the opening surface of the seat frame 22). The seat cushion body 22 is joined to the front side in the longitudinal direction of the vehicle body on both sides of the seat frame 22 (a position in front of the buttocks of the occupant seated on the seat cushion body 21) by means such as welding.
Furthermore, the insertion holes 24 of the support bracket 23 are formed at two locations on the inner bottom of the U-shaped cross section of the support bracket 23. The peripheral portion of each of these insertion holes 24 has an outer side (seat frame 2
A substantially flange-shaped protruding portion 26 protruding toward the second side) is formed by, for example, burring.

Further, the energy absorbing cross member 25 is formed of, for example, a solid round rod or a hollow pipe. Two cross members 25 are arranged in the longitudinal direction of the vehicle body. Both end portions of each cross member 25 are inserted into respective insertion holes 24 of support brackets 23, 23 on both sides of the seat frame 22, respectively. In this case, both end portions of each cross member 25 extend to an appropriate extended position outside the tip surface position of the protruding portion 26 at the peripheral portion of each insertion hole 24, and the end edge of this extended portion A retaining pin 27 is fitted in. At both ends of these cross members 25, 25, as shown in FIG.
An appropriate gap s (shown in FIG. 3) is formed between the tip end surface position of the fifth pin and the retaining pin 27.
As shown in the figure, as the cross member 25 deforms due to the pressing force F that presses the hip position of the occupant seated on the seat body 1 forward from the normal seating position, the deformation stroke ranges within this gap s. Inside, the cross member 25 is slidable along the inner peripheral surface of the protrusion 26 at the peripheral edge of each insertion hole 24.

Therefore, in the case of the above structure, support brackets are provided at the front end portions of both sides of the seat frame 22 mounted in the seat cushion body 21 of the seat body 1, and protrude from the inner side of the seat frame 22 in a spaced-apart and opposing state. 23, 23 are provided, and are arranged toward the vehicle width direction, and both ends are inserted and supported in the insertion holes 24 of the support brackets 23, 23 on both sides of the seat frame 22, and are seated on the seat body 1. Since the energy absorbing cross member 25 is provided to prevent the waist position of the occupant from moving forward from the normal seating position, a vehicle traveling with the seat belt device 4 in use can cause a collision. Even when the waist belt 11 is weakly restraining the occupant's waist, these cross members 25, 25 receive a pressing force that moves the occupant's waist forward, thereby suppressing forward movement of the occupant's waist. be able to. Therefore, it is possible to prevent the occupant's lower back from sliding on the upper surface of the seat cushion 2 and being pushed forward due to inertia force etc. when a running vehicle causes a collision as in the past. It is possible to prevent the submarine phenomenon in which the upper body side of the occupant sinks below the seat body 1, thereby improving safety.

Further, a substantially flange-shaped protrusion 26 is formed at the periphery of the insertion hole 24 of the support bracket 23, and both ends of the energy absorbing cross member 25 are formed at the protrusion at the periphery of each insertion hole 24. 26 to an appropriate extended position outside the tip surface position, and a retaining pin 27 is fitted to the edge of this extended part, so that the sheet can be secured as shown in FIG. An operation in which the cross member 25 is transformed from the normal state shown in FIG. 4 to the deformed state shown in FIG. Accordingly, the deformation stroke within the range of the gap s formed between the tip surface position of the protruding portion 26 at the peripheral edge portion of each insertion hole 24 of each support bracket 23, 23 at both ends of the cross member 25 and the retaining pin 27. Inside, the cross member 25 is slidable along the inner peripheral surface of the protrusion 26 at the peripheral edge of each insertion hole 24. Therefore, the pressing energy that causes the occupant's waist to move forward can be absorbed by the deformation of the cross members 25, 25, so that the impact force acting on the occupant in the event of a collision can be reduced. Furthermore, as the cross member 25 deforms from the normal state shown in FIG. 4 to the deformed state shown in FIG. The cross member 25 is inserted into each insertion hole 2 within the deformation stroke within the range of the gap s formed between the tip surface position of the portion 26 and the retaining pin 27.
4. The cross member 25 slides along the inner circumferential surface of the protrusion 26 at the circumferential edge of each insertion hole 24, and the resistance force generated when the cross member 25 handles the inner circumferential surface of the protrusion 26 at the circumferential edge of each of the insertion holes 24 acts on the occupant. Acting impact energy can be absorbed over a relatively long period of time. Therefore, for example, the cross member 25 and the support brackets 23, 2
3 are joined by means such as welding, the cross member 25 and the support bracket 23,
23 can be prevented from peeling off due to the pressing energy that moves the occupant's waist forward and become unable to absorb the impact force that acts on the occupant in the event of a collision, thereby increasing the reliability of operation. It is possible to further improve safety by increasing the

Note that this invention is not limited to the above embodiments. For example, in the above embodiment, the seat frame 22 of the seat cushion main body 21 is constructed by bending a structural member having a substantially U-shaped cross-sectional shape into a substantially rectangular frame shape with the opening side facing inward. As shown in the case of use, as shown in FIG.
1 forms the seat frame of the seat cushion main body 21, and this pan frame 3
Support brackets 32, 32 having a substantially L-shaped cross section are joined to both sides of the support brackets 32, 32 by means such as welding, and a cross member 34 is inserted into the burring shapes 33, 33 formed on these support brackets 32, 32. It may be configured such that both ends of the holder are supported in an inserted state. Further, the number of cross members may be one or three or more. Further, the cross member may be made by bending a sheet metal into a rectangular shape, and the cross-sectional shape may be circular, annular, or
Alternatively, it may have a shape other than a rectangle. Furthermore, it goes without saying that various other modifications can be made without departing from the gist of the invention.

[Effect of idea]

According to this invention, support brackets are provided at the front end portions of both sides of the seat frame installed in the seat cushion body of the seat, and are provided with support brackets that protrude from the inside of the seat frame in a spaced-apart manner and face each other. energy that is arranged and supported with both ends inserted into insertion holes of support brackets on both sides of the seat frame to suppress the position of the waist of an occupant seated on the seat from moving forward from the normal seating position; Since an absorbing cross member is provided, even if the occupant's lumbar region is weakly restrained by the seatbelt system, the occupant's lumbar region will not be compressed by the seat cushion due to inertia when the vehicle is in motion and causes a collision. This prevents the occupant from sliding on the top surface of the seat and being pushed forward, and prevents the submarine phenomenon where the upper body of the occupant sinks below the seat, improving safety. can increase the certainty of

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of this invention, and Figure 1 is a side view showing the overall schematic configuration;
Figure 2 is a perspective view showing the installation state of the energy absorbing cross member attached to the seat frame;
Fig. 3 is a vertical cross-sectional view of the main part of Fig. 2, Fig. 4 is a vertical cross-sectional view showing the normal installation state of the cross member,
FIG. 5 is a longitudinal sectional view showing the deformed state of the cross member, FIG. 6 is a longitudinal sectional view of the main part showing another embodiment,
FIG. 7 is an overall side view showing a conventional example. 4... Seat belt device, 5... Shoulder anchor (upper support part), 9... Buckle (lower support part), 10
... Shoulder belt, 21 ... Seat cushion body,
22, 31... Seat frame, 23, 32...
Support bracket, 24, 33...Insertion hole, 2
5, 34...Cross member.

Claims (1)

[Scope of utility model registration request] The upper body of the occupant seated on the seat is stretched between an upper support part disposed at the upper part of one side of the seat installed in the vehicle interior and a lower support part disposed at the lower part of the other side of the seat. In a vehicle seat structure in which a shoulder belt type seat belt device for restraint is installed, a seat frame that is installed in the seat cushion body of the seat has a front end portion on both sides protruding inside the seat frame in a spaced-apart and opposing state. In addition to providing a support bracket, the support bracket is disposed toward the vehicle width direction, and both ends of the support bracket are inserted into the insertion holes of the support brackets on both sides of the seat frame to support the lower back of the occupant seated on the seat. A vehicle seat structure comprising an energy absorbing cross member that prevents the position from moving forward from a normal seating position.