JPH0761274A - Impact absorbing seat for automobile - Google Patents

Abstract

PURPOSE:To provide an impact absorbing seat for an automobile preventing or reducing the injury of an occupant at the rear-end collision time of the automobile. CONSTITUTION:In the case of forward impact force acting upon the body of an automobile, an impact absorbing seat for an automobile is provided with an energy absorbing member 5 made of fiber reinforced plastic so as to be compression-destructed while moving the seat 1 relatively backward to an automobile body in the case of forward impact force acting upon the body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorbing sheet for an automobile, which reduces the shock acceleration applied to an occupant during a rear collision.

[0002]

2. Description of the Related Art Conventionally, various experiments and studies have been conducted on the safety of automobiles in a collision accident, and the safety of automobiles in recent years has reached a high level. Especially for frontal collisions that often result in fatalities due to accidents, the development of seat belts, airbags, etc. is progressing in addition to energy absorption by the vehicle body.

However, the number of injured persons is the largest in the case of a rear collision, that is, a so-called rear-end collision. In most cases, the occupant is not killed, and the pursuit of safety is delayed. There is.

[0004]

SUMMARY OF THE INVENTION The present invention provides a shock absorbing sheet for an automobile, which prevents or reduces injuries to an occupant in a rear collision of the automobile.

[0005]

The shock absorbing sheet for an automobile according to the present invention, which meets the above object, is a sheet for an automobile, comprising:
When a front impact force is applied to the body of an automobile, a fiber reinforced plastic energy absorption member is provided that absorbs impact energy by compressing and breaking while moving the seat rearward relative to the body. It consists of features.

[0006]

In other words, when a vehicle undergoes a rear collision, that is, a so-called rear-end collision, a shocking forward acceleration is generated in the vehicle body. As a result of this acceleration being transmitted to the occupant via the seat, the occupant will be injured such as whiplash. In such a case, in order to prevent or reduce the injury of the occupant, it is necessary to reduce the shocking acceleration transmitted to the occupant.

As a means for reducing the shocking acceleration transmitted to the occupants, it is considered that the rear part of the vehicle body has a crushable structure to reduce the acceleration of the vehicle body itself, which is actually incorporated in the structure of the vehicle. . However, among the causes of injury while riding a car in Japan,
Given that rear crashes are the most common cause, it cannot be said that measures have been taken sufficiently.

Therefore, in the present invention, when an impact force is applied to the vehicle body of the automobile in a forward direction, the seat is moved relatively rearward with respect to the vehicle body while compressing and breaking to absorb the impact energy, and the impact on the occupant. The seat is provided with an energy absorbing member for reducing the physical acceleration. As a result, the acceleration applied to the occupant is further reduced than the acceleration of the vehicle body, and the injury to the occupant can be prevented or reduced.

Further, if the impact acceleration of the occupant at the time of a rear collision of the vehicle is reduced by implementing the present invention, the strength required for the seat back or the seat reclining mechanism is correspondingly reduced, and the weight is lighter. There is also an advantage that you can design different seats.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the automotive shock absorbing sheet of the present invention will be described below with reference to the drawings. FIG. 1 shows an automobile shock absorbing sheet according to an embodiment of the present invention, and shows a case where the present invention is applied to an automobile seat that does not include a seat front-back position adjusting mechanism. In the figure, 1 indicates a seat mounted on an automobile. The seat 1 is installed on the seat pedestal 4. Reference numeral 3 denotes a rail provided so that the seat pedestal 4 can be moved rearward, and is a rail provided for application of the present invention. That is, at the time of a rear collision, the seat 1 can be moved back and forth along the rail 3 via the seat pedestal 4. Appropriate energy absorbing members 5 are provided to provide resistance to the movement of the seat 1 as it moves rearward along the rails 3. One end of the energy absorbing member 5 is connected to the seat pedestal 4, and the other end is connected to an appropriate fixing portion 6. The series of mechanisms under the seat constitutes the energy absorbing mechanism 2.

In this case, the energy absorbing member 5 is used in the sense that the shock acceleration of the occupant is reduced as much as possible.
It is preferable to reduce the resistance force of the seat to increase the moving distance of the seat, but in reality, the seat moving distance is limited, and accordingly, the resistance of the energy absorbing member 5 is set appropriately. Must be designed into.

Further, a seat used for a front seat of a passenger car or the like usually has a function of adjusting the position of the seat back and forth. In such a case, as shown in FIG. The energy absorbing mechanism 2 including the energy absorbing member 5 substantially similar to that shown in FIG. 1 may be provided between the adjusting mechanism 7 and the seat 1.

The energy absorbing member 5 used for these is
It is composed of fiber reinforced plastic members. The fiber-reinforced plastic energy absorbing member 5 is not particularly limited, but a cylindrical fiber-reinforced plastic, particularly a carbon fiber-reinforced plastic, is used in order to satisfy the requirements for stable energy absorption performance and weight reduction of automobiles. It is preferable to use. For example, when a cylinder 9 made of a carbon fiber / nylon resin composite material having one end tapered as shown in FIG. 3 is used, an energy absorbing member capable of exhibiting a large amount of energy absorption with a small weight can be obtained.

When the present invention is applied to a seat having a front-back position adjusting mechanism, if the front-back position adjusting mechanism and the energy absorbing mechanism are installed separately, two sets of rails for moving the seat forward and backward are required. However, it is not preferable because it may increase the production cost and the weight.

Therefore, as another embodiment of the present invention, the front-back position adjusting mechanism itself can be provided with an energy absorbing capability. For example, generally, a seat front-back position adjusting mechanism includes a rail 10 for position movement and a notched rail 11 for position fixing as shown in FIG. The seat can be fixed at a desired position by operating the front-back position adjusting lever 12 to move the seat pedestal 13 along the rail 10 and engaging the engaging piece 14 with the notched rail 11 after the movement. By making the material of the notched rail 11 a crushable material made of fiber reinforced plastic, it is possible to realize a shock absorbing sheet that moves backward while sequentially breaking the notches.

The fiber reinforced plastic used for the notched rail 11 is not particularly limited as long as it has sufficient strength to fix the sheet at normal times and can absorb energy by breaking the notches at the time of rear collision. However, it is particularly preferable to use carbon fiber reinforced plastic in order to satisfy the requirements of stable energy absorption performance and weight reduction of automobiles. For example, when a notched rail made of a carbon fiber / nylon resin composite material is used, a large amount of energy can be absorbed with a small weight.

[0017]

As described above, according to the present invention,
An automobile seat equipped with a fiber-reinforced plastic energy absorbing member that absorbs impact energy by compressing and breaking while moving the seat backward relative to the vehicle body when a forward impact force acts on the vehicle body To prevent injuries to passengers in the event of a rear collision of a vehicle,
Alternatively, it can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an automobile shock absorbing sheet according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of an automobile shock absorbing sheet according to another embodiment of the present invention.

FIG. 3 is a perspective view showing an example of an energy absorbing member used in the present invention.

FIG. 4 is a perspective view of the case where the present invention is applied to a general front-back position adjusting mechanism of a vehicle seat.

[Figure 5]

[Explanation of symbols]

1 seat 2 energy absorption mechanism 3 rail 4 seat pedestal 5 fiber reinforced plastic energy absorption member 6 fixed part 7 front and rear position adjustment mechanism 8 taper part 9 fiber reinforced plastic energy absorption member 10 rail 11 as fiber reinforced plastic energy absorption member Notched rail 12 Front-rear position adjustment lever 13 Seat pedestal 14 Engagement piece

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[Procedure amendment]

[Submission date] May 25, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an automobile shock absorbing sheet according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of an automobile shock absorbing sheet according to another embodiment of the present invention.

FIG. 3 is a perspective view showing an example of an energy absorbing member used in the present invention.

FIG. 4 is a perspective view of the case where the present invention is applied to a general front-back position adjusting mechanism of a vehicle seat.

[Explanation of reference numerals] 1 seat 2 energy absorption mechanism 3 rail 4 seat pedestal 5 energy absorption member made of fiber reinforced plastic 6 fixing part 7 front and rear position adjusting mechanism 8 taper part 9 energy absorption member made of fiber reinforced plastic 10 rail 11 made of fiber reinforced plastic Notched rail 12 as energy absorbing member 12 Front-rear position adjusting lever 13 Seat pedestal 14 Engagement piece

Claims (3)

[Claims] 1. In a vehicle seat, when a forward impact force acts on a vehicle body of an automobile, the seat is moved rearward relative to the vehicle body to compressively break and absorb impact energy. A shock absorbing sheet for an automobile, comprising a plastic energy absorbing member. 2. The shock absorbing sheet for an automobile according to claim 1, wherein an energy absorbing member is provided between the front and rear position adjusting mechanism of the automobile seat having the front and rear position adjusting mechanism and the seat. 3. The shock absorbing sheet for an automobile according to claim 1, wherein the front and rear position adjusting mechanism itself of the automobile seat provided with the front and rear position adjusting mechanism also has an energy absorbing capacity.