JPH0242704B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat belt device for an automobile.

Generally, in this type of seatbelt device, a seatbelt anchor for fixing one end of the seatbelt is fixed to the floor panel, as seen in Japanese Patent Publication No. 53-36651, for example. In the belt device, when the seat body is provided with a seat slide mechanism and the seat body can be slid back and forth in the direction of travel of the vehicle, the position of the anchor changes as the seat body slides, and in some cases, the position of the anchor may change. There is a problem in that it becomes difficult to place the belt in the correct position on the body.

To solve the above problem, the anchor may be attached to the seat itself, but in this case, the force acting on the seat belt during a car collision etc. is transmitted to the seat body through the slide adjustment mechanism. Since the power is transmitted to the vehicle body, the seat body and the slide adjustment mechanism must be made very strong, which significantly increases the weight of the seat.

Therefore, the weight of the vehicle increases accordingly, resulting in an increase in wasteful fuel consumption, and also causes inconveniences such as the need for a large force when sliding the seat.

The present invention has been developed to solve the above problems.

A seatbelt device in which a seatbelt anchor is attached to a seat, the support having a substantially C-shaped cross section and having an opening opening toward the seat at a position opposite to the side of the seat in the body of an automobile. a fixing part that is provided along the front and rear of the vehicle and is fixed to the seat; a pair of engaging parts that are located on both sides of the fixing part in the front and back direction and have a hat-shaped cross section and loosely fit into the support rail; fixing an interference body to the seat together with the anchor, and causing the interference body to interfere with the support rail when the seat moves upward due to a load acting on the seat belt;
The present invention is characterized in that the load is received by the body.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A seat belt device according to the present invention will be described below based on embodiments shown in the drawings.

In the figure, reference numeral 1 denotes a seat consisting of a seat cushion 11 and a seat back 12, in which a seat back binge member 22 is pivoted on a seat cushion side hinge member 21 fixed to the side rear end of the seat cushion 11. By fixing the seat bag 12 to the hinge member 22, the seat bag 12 can be attached to the seat cushion 1.
1, it is supported so that it can be reclined.

Upper rails 31 constituting a seat slide mechanism are disposed on both sides of the lower surface of the seat cushion 11, while a lower rail 33 is fixed to the upper surface of the floor panel 30 via a bracket 32. Atsupa Rail 3
1 through rollers (not shown), the seat cushion 11, in other words, the seat 1, is moved forward and backward in the direction of travel of the vehicle (A-A direction in FIG. 1).
The slide is adjustable.

A locking mechanism (not shown) is provided between the upper rail 31 and the lower rail 32 to lock the slide of the seat 1 at any position.

Accordingly, the present invention provides a body that faces the side of the seat 1, specifically the seat cushion 11,
A support rail 4 having a substantially C-shaped cross section and having an opening 41 opening on the seat cushion side is disposed along the sliding direction of the seat 1, while a seat belt is attached to the side of the seat cushion 11. A belt anchor 50 that fixes one end of the seat belt 5 and an interference body 6 that loosely fits on the support rail 4 are attached, and when the seat 1 moves upward due to the load acting on the seat belt 5, the support rail of the interference body 6 is attached. By interfering with 4, the load is received by the body.

That is, in the embodiment shown in the figure, the support rail 4 has a length corresponding to the sliding amount of the seat 1, and openings at both ends in the longitudinal direction are closed by reinforcing plates 42, 42, and the floor constituting the body is The support rail 4 is attached to the side wall of the tunnel 10,
The opening 41 is arranged so as to extend along the sliding direction of the seat 1, and the mounting screw 43
is inserted through the through hole 44 formed in the rail 4 into the through hole 10a provided in the side wall of the floor tunnel 10, and the insertion end thereof is inserted into the floor tunnel 1.
The support rail 4 is fixed by screwing into a nut 45 fixed to the inner wall of the support rail 4.

On the other hand, an insertion hole 21a is formed in the seat cushion side hinge member 21 fixed to the side of the seat cushion 11 facing the floor tunnel 10, and a nut 23 is fixed to the inner surface thereof. One end of the belt anchor 50 and the interference body 6 are inserted into and supported by the connecting bolt 7 screwed into the nut 23 through the insertion hole 21a.

Further, the interference body 6 has a fixing portion 61 provided with an insertion hole 61a for the connection bolt 7 as shown in FIG.
Engagement parts 62 and 6 having a hat-shaped cross section are integrally formed on both sides of the fixed part 61 and can be loosely fitted into the rail 4 from the opening 41 of the support rail 4.
2, and reinforcing members 63, 63 are installed between the opposing inner walls 62a, 62a, 62a, 62a of the engaging portions 62, 62.

The present invention has the above-mentioned configuration, and the engagement portion 6 of the interference body 6 attached to the side of the seat cushion 11
2 and 62 are loosely fitted into the support rail 4 arranged in the sliding direction of the seat 1,
Normally, when the seat 1 is slid back and forth in the direction of travel of the automobile, the engaging portions 62, 62 only move within the rail 4, and therefore the seat 1
The position of the vehicle can be freely changed forward and backward in the direction of travel of the vehicle without any hindrance.

Therefore, for example, in the case of a sudden stop or a car collision, the seat belt 5 is attached in the direction of arrow B in FIG.
That is, a large load acts diagonally upward with respect to the sliding direction of the seat 1, and the load is transmitted from the belt anchor 50 fixing one end of the seat belt 5 to the seat 1, and the seat 1 is about to move in the direction of the arrow in FIG. Said seat belt 5
The load acting on the seat 1 can be reliably received by the support rail 4, in other words, by the body. In particular, when the load causes the rear part of the seat 1 to be lifted up from the front part, the seat 1 is moved forward. When the interference body 6 moves diagonally upward, the interference body 6 tilts with respect to the support rail 4, and the engagement portion 62, 62 of the interference body 6, which is located at the rear in the front-rear direction, The upper rear end of the portion 62 engages with the upper inner wall surface of the support rail 4, and the lower front end of the engagement portion 62 on the front side in the front-rear direction engages with the lower inner wall surface of the support rail 4, Not only can the seat 1 itself be prevented from tilting any further, but also the engagement portions 62, 62 can be prevented from tilting by the interference body 6.
Since the belt acts as a wedge and locks onto the support rail 4, the load acting on the seat belt 5 can be reliably received by the support rail 4. There is no need to provide a special frame to improve the strength, or to particularly improve the strength of the upper rail 31 and lower rail 33.

As described above, according to the present invention, when the seat is adjusted to slide forward and backward in the direction of travel of the vehicle, the fixed position of the seat belt relative to the seat can always be kept constant regardless of the adjustment. The occupant can be safely restrained by always placing the occupant in an appropriate position, and when adjusting the slide, the engaging portion of the interference body, which has a hat-shaped cross section, simply moves within the support rail. This can be done without any problems. Moreover, when a large load is applied to the seatbelt diagonally forward and upward with respect to the sliding direction of the seat, such as during a sudden stop or a car collision, and the seat attempts to move diagonally forward and upward, the interfering body The upper end surface of the engaging portion having a hat-shaped cross section engages with the inner wall surface of the support rail,
The load acting on the seat belt can be reliably received by the body, especially when the load causes the seat to move obliquely forward and upward, for example, with the rear part of the seat being lifted up from the front part. In this case, the interference body is tilted with respect to the support rail, and the upper rear end of the engagement part located rearward in the front-rear direction among the pair of engagement parts of the interference body is aligned with the upper inner wall surface of the support rail. The lower front end of the engagement portion on the front side in the front-rear direction engages with the lower inner wall surface of the support rail, thereby preventing the seat itself from further tilting, and preventing the interference. When the body tilts, the engaging portion acts as a wedge and locks onto the support rail, allowing the support rail to reliably absorb the load acting on the seatbelt. There is no need to create a strong shaft or slide adjustment mechanism, and therefore the vehicle weight does not increase significantly.

In other words, it has become possible to provide a seatbelt device with superior performance compared to the case where the slide adjustment mechanism and the like are made stronger as described above.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of the seat belt device of the present invention, FIG. 2 is an enlarged sectional view taken along the line of FIG. 1, and FIG. 3 is a perspective view of an interference body. DESCRIPTION OF SYMBOLS 1... Seat, 4... Support rail, 5... Seat belt, 50... Belt anchor, 6... Interfering body, 61... Fixing part, 62... Engaging part.

Claims (1)

[Claims] 1. A seatbelt device in which a seatbelt anchor is attached to the seat, which has a substantially C-shaped cross section and has an opening opening toward the seat at a position opposite to the side of the seat in the body of the automobile. A support rail is provided along the front and back of the vehicle traveling direction, and a fixing part is fixed to the seat, and a pair of hook-shaped cross-sectional engagements located on both sides of the fixing part in the front and back direction and loosely fitting into the support rail. An interference body having a section is fixed to the seat together with the anchor, and when the seat moves upward due to a load acting on the seat belt, the interference body is caused to interfere with the support rail and the load is received by the body. A seat belt device for an automobile, which is characterized in that it acts as if it were stopped.